CN216136995U

CN216136995U - Fuming sulfuric acid preparation facilities

Info

Publication number: CN216136995U
Application number: CN202121754689.9U
Authority: CN
Inventors: 高飞; 岳焕玲; 董四禄; 肖万平; 秦赢
Original assignee: China ENFI Engineering Corp
Current assignee: China ENFI Engineering Corp
Priority date: 2021-07-29
Filing date: 2021-07-29
Publication date: 2022-03-29
Anticipated expiration: 2031-07-29

Abstract

The utility model relates to the technical field of chemical engineering, in particular to a fuming sulfuric acid preparation device. The fuming sulfuric acid preparation device comprises a purification tower, a desulfurization tower, a regeneration tower, a converter and an absorption tower, wherein the purification tower is provided with a first cavity, a sulfur-containing flue gas inlet and a first purified flue gas outlet, and a first spraying device is arranged in the first cavity; the desulfurizing tower is provided with a third chamber, a second purified flue gas inlet, a second desulfurizing agent outlet and a desulfurized gas outlet, and a third spraying device is arranged in the third chamber; a heat source is arranged on the regeneration tower; the converter is provided with a fifth chamber, a sulfur dioxide inlet, an oxygen-containing gas inlet and a sulfur trioxide outlet, and a catalyst layer is arranged in the fifth chamber; the absorption tower has a sixth cavity, a sulfur trioxide inlet, a second sulfuric acid outlet and a tail gas outlet, and a fourth spraying device is arranged in the sixth cavity. The fuming sulfuric acid preparation device solves the problem of treatment of low-concentration flue gas, and simultaneously changes waste into valuables to produce fuming sulfuric acid with high added value.

Description

Fuming sulfuric acid preparation facilities

Technical Field

The utility model relates to the technical field of chemical engineering, in particular to a fuming sulfuric acid preparation device.

Background

In the related technology, the sulfur-containing flue gas, such as flue gas generated by slag treatment, is desulfurized mainly by a gypsum method, namely, the sulfur-containing flue gas is treated by limestone slurry to remove sulfur dioxide in the sulfur-containing flue gas. Therefore, a large amount of gypsum is generated in the process of treating the sulfur-containing flue gas, and on one hand, the economic value of the gypsum is lower; on the other hand, the produced gypsum is generally subjected to stockpiling treatment, and the stockpiled gypsum occupies large space and is easy to cause secondary pollution.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.

To this end, embodiments of the present invention provide an oleum production apparatus that produces oleum using low concentration sulfur-containing flue gas.

The oleum production apparatus according to an embodiment of the present invention includes:

the purification tower is provided with a first cavity, and a sulfur-containing flue gas inlet and a first purified flue gas outlet which are communicated with the first cavity, wherein a first spraying device for spraying a purification liquid is arranged in the first cavity, the sulfur-containing flue gas inlet can be communicated with a sulfur-containing flue gas source, the first spraying device is positioned between the sulfur-containing flue gas inlet and the first purified flue gas outlet in the vertical direction, and the sulfur-containing flue gas inlet is positioned below the first purified flue gas outlet;

the desulfurization tower is provided with a third chamber, and a second purified flue gas inlet, a second desulfurizer outlet and a desulfurization gas outlet which are communicated with the third chamber, wherein a third spraying device for spraying a first desulfurizer is arranged in the third chamber, the second purified flue gas inlet is connected with the first purified flue gas outlet, the third spraying device is positioned between the second purified flue gas inlet and the desulfurization gas outlet in the vertical direction, the second purified flue gas inlet is positioned below the desulfurization gas outlet, and the second desulfurizer outlet is positioned below the second purified flue gas inlet;

the regeneration tower is provided with a fourth cavity, and a second desulfurizer inlet, a sulfur dioxide outlet and a first desulfurizer outlet which are communicated with the fourth cavity, and a heat source for heating a second desulfurizer is arranged on the regeneration tower, wherein the second desulfurizer inlet is connected with the second desulfurizer outlet, the second desulfurizer inlet is positioned between the sulfur dioxide outlet and the first desulfurizer outlet in the vertical direction, and the first desulfurizer outlet is positioned below the sulfur dioxide outlet;

the converter is provided with a fifth chamber, and a sulfur dioxide inlet, an oxygen-containing gas inlet and a sulfur trioxide outlet which are communicated with the fifth chamber, wherein a catalyst layer is arranged in the fifth chamber, the sulfur dioxide inlet is connected with the sulfur dioxide outlet, the oxygen-containing gas inlet can be communicated with an oxygen-containing gas source, the catalyst layer is positioned between the sulfur dioxide inlet and the sulfur trioxide outlet in the vertical direction, the sulfur trioxide outlet is positioned below the sulfur dioxide inlet, and the oxygen-containing gas inlet is positioned above the catalyst layer; and

the absorption tower, the absorption tower have the sixth cavity and with sulfur trioxide import, second sulfuric acid export and the exhaust outlet of sixth cavity intercommunication, be equipped with the fourth spray set who is used for spraying first sulphuric acid in the sixth cavity, wherein the sulfur trioxide import with the sulfur trioxide export links to each other, the fourth spray set is located in the up and down direction the sulfur trioxide import with between the exhaust outlet, the sulfur trioxide import is located exhaust outlet below, the second sulfuric acid export is located sulfur trioxide import below.

The fuming sulfuric acid preparation device provided by the embodiment of the utility model has the advantages of good sulfur-containing flue gas treatment effect, good quality of prepared fuming sulfuric acid and the like.

In some embodiments, the cooling tower further comprises a cooling tower, the cooling tower has a second chamber, and a first purified flue gas inlet and a second purified flue gas outlet which are communicated with the second chamber, a second spraying device for spraying cooling liquid is arranged in the second chamber, wherein the first purified flue gas inlet is connected with the first purified flue gas outlet, the second purified flue gas outlet is connected with the second purified flue gas inlet, the second spraying device is located between the first purified flue gas inlet and the second purified flue gas outlet in the up-down direction, and the first purified flue gas inlet is located below the second purified flue gas outlet.

In some embodiments, further comprising:

the cooling tower is further provided with a cooling liquid inlet and a cooling liquid outlet which are communicated with the second cavity, the cooling liquid inlet is connected with the second spraying pipe, the second spraying pipe is connected with the second spraying device, and the cooling liquid outlet is positioned below the first purified flue gas inlet; and

the cooling liquid pump, coolant liquid exit tube and coolant liquid advance the pipe, the coolant liquid pump has coolant liquid pump import and coolant liquid pump export, the coolant liquid export with the coolant liquid exit tube links to each other, the coolant liquid exit tube with the coolant liquid pump import links to each other, the coolant liquid pump export with the coolant liquid advances the pipe and links to each other, the coolant liquid advance the pipe with the coolant liquid import links to each other.

In some embodiments, further comprising:

the heat exchanger is provided with a cooling liquid inlet, a cooling liquid outlet, a cooling liquid inlet and a cooling liquid outlet, the cooling liquid inlet is communicated with the cooling liquid outlet, the cooling liquid pump outlet is connected with the heat exchanger connecting pipe, the heat exchanger connecting pipe is connected with the cooling liquid inlet, and the cooling liquid outlet is connected with the cooling liquid inlet pipe; and

the cooling system comprises a cooling agent inlet pipe and a cooling agent outlet pipe, wherein a cooling agent inlet is connected with the cooling agent inlet pipe, a cooling agent outlet is connected with the cooling agent outlet pipe, and the cooling agent inlet pipe can be communicated with cooling agent.

In some embodiments, further comprising:

the purification tower is further provided with a purification liquid inlet and a purification liquid outlet which are communicated with the first cavity, the purification liquid inlet is connected with the first spray pipe, the first spray pipe is connected with the first spray device, and the purification liquid outlet is positioned below the sulfur-containing flue gas inlet; and

the pipe is advanced to scavenging solution pump, scavenging solution exit tube and scavenging solution, the scavenging solution pump has scavenging solution pump import and scavenging solution pump export, the scavenging solution export with the scavenging solution exit tube links to each other, the scavenging solution exit tube with the scavenging solution pump import links to each other, the scavenging solution pump export with the scavenging solution advances the pipe and links to each other, the scavenging solution advance the pipe with the scavenging solution import links to each other.

In some embodiments, further comprising:

the regeneration tower is further provided with a second desulfurizer inlet and a first desulfurizer outlet which are communicated with the fourth cavity, the first desulfurizer inlet is connected with the third spray pipe, the third spray pipe is connected with the third spray device, the second desulfurizer outlet is positioned below the second purified flue gas inlet, and the first desulfurizer outlet is positioned below the second desulfurizer inlet;

the first desulfurizer pump is provided with a first desulfurizer pump inlet and a first desulfurizer pump outlet, the first desulfurizer outlet is connected with the first desulfurizer pipe, the first desulfurizer pipe is connected with the first desulfurizer pump inlet, the first desulfurizer pump outlet is connected with the second desulfurizer pipe, and the second desulfurizer pipe is connected with the first desulfurizer inlet; and

the second desulfurizer pump is provided with a second desulfurizer pump inlet and a second desulfurizer pump outlet, the second desulfurizer outlet is connected with the third desulfurizer pipe, the third desulfurizer pipe is connected with the second desulfurizer pump inlet, the second desulfurizer pump outlet is connected with the fourth desulfurizer pipe, and the fourth desulfurizer pipe is connected with the second desulfurizer inlet.

In some embodiments, further comprising:

the absorption tower is further provided with a first sulfuric acid inlet communicated with the sixth cavity, the first sulfuric acid inlet is connected with the fourth spraying pipe, and the fourth spraying pipe is connected with the fourth spraying device;

the fuming sulfuric acid pool is provided with a second sulfuric acid inlet, a supplementing water inlet and a first sulfuric acid outlet, the second sulfuric acid outlet is connected with the second sulfuric acid pipe, the second sulfuric acid pipe is connected with the second sulfuric acid inlet, the supplementing water inlet is connected with the supplementing water pipe, and the supplementing water pipe can be communicated with a water source; and

the first sulfuric acid outlet is connected with the first sulfuric acid pipe, each of the first sulfuric acid branch pipe and the first sulfuric acid main pipe is connected with the first sulfuric acid pipe, and the first sulfuric acid main pipe is connected with the first sulfuric acid inlet.

Drawings

FIG. 1 is a schematic structural view of an oleum production apparatus according to one embodiment of the present invention.

Fig. 2 is a schematic view of the structure of the purification tower and the cooling tower of fig. 1.

Fig. 3 is a schematic view of the configuration at the desulfurization tower and the regeneration tower of fig. 1.

Fig. 4 is a schematic view of the structure at the converter and the absorption tower in fig. 1.

Reference numerals: an oleum preparation device 100;

a purification tower 1; a first chamber 101; a sulfur-containing flue gas inlet 102; a first purified flue gas outlet 103; a purified liquid inlet 104; a purified liquid outlet 105; a purge liquid pump 106; a purge pump inlet 1061; a purified liquid pump outlet 1062; a sulfur-containing flue gas source 107; a flue gas inlet pipe 1071; a clean flue gas duct 108; a purified liquid outlet pipe 109; a purified liquid inlet pipe 110; a first spray device 111; a first shower 1111;

a cooling tower 2; a second chamber 201; a first purified flue gas inlet 202; a second purified flue gas outlet 203; a coolant inlet 204; a coolant outlet 205; a coolant pump 206; a coolant pump inlet 2061; a coolant pump outlet 2062; a cooling flue gas duct 208; a coolant outlet pipe 209; a coolant inlet pipe 210; a second spraying device 211; a second shower 2111; a heat exchanger 212; a heat exchanger first inlet 2121; a heat exchanger first outlet 2122; a heat exchanger second inlet 2123; a coolant inlet line 21231; a heat exchanger second outlet 2124; a coolant outlet pipe 21241; a heat exchanger connection pipe 2125;

a desulfurizing tower 3; a third chamber 301; a second purified flue gas inlet 302; a second desulfurizing agent outlet 303; a sweet gas outlet 304; a desulfurization gas pipe 3041; a first desulfurizing agent inlet 305; a second desulfurizer pump 306; a second desulfurizer pump inlet 3061; the second desulfurizer pump outlet 3062; a third desulfurizing agent pipe 307; a fourth desulfurizing agent pipe 308; a first desulfurizing agent pipe 309; a second desulfurizer pipe 310; a third spray device 311; a third shower pipe 3111;

a regeneration tower 4; a fourth chamber 401; a second desulfurizing agent inlet 402; a sulfur dioxide outlet 403; a first desulfurizing agent outlet 405; a first desulfurizer pump 406; a first desulfurizer pump inlet 4061; the outlet 4062 of the first desulfurizer pump;

a converter 5; a fifth chamber 501; a sulfur dioxide inlet 502; a sulfur trioxide outlet 503; an oxygen-containing gas inlet 504; a sulfur dioxide pipe 505; an oxygen-containing gas pipe 506; a sulfur trioxide tube 507; a mixed gas pipe 508;

an absorption tower 6; a sixth chamber 601; a sulfur trioxide inlet 602; a second sulfuric acid outlet 603; a first sulfuric acid inlet 604; a tail gas outlet 605; an exhaust pipe 6051; a fourth spray device 606; a fourth shower 6061;

a fuming sulfuric acid pool 7; a second sulfuric acid inlet 701; a first sulfuric acid outlet 702; a make-up water inlet 703; a supplementary water pipe 704; a second sulfuric acid tube 705; a first sulfuric acid pipe 706; a first sulfuric acid branch pipe 7061; a first main sulfuric acid tube 7062.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.

As shown in fig. 1 to 4, an oleum production apparatus 100 according to an embodiment of the present invention includes a purification tower 1, a desulfurization tower 3, a regeneration tower 4, a converter 5, and an absorption tower 6.

The purification tower 1 is provided with a first chamber 101, and a sulfur-containing flue gas inlet 102 and a first purified flue gas outlet 103 which are communicated with the first chamber 101, and a first spraying device 111 for spraying a purification liquid is arranged in the first chamber 101. Wherein, the inlet 102 of the sulfur-containing flue gas can be communicated with the source of the sulfur-containing flue gas, the first spraying device 111 is positioned between the inlet 102 of the sulfur-containing flue gas and the first purified flue gas outlet 103 in the up-down direction, and the inlet 102 of the sulfur-containing flue gas is positioned below the first purified flue gas outlet 103.

The desulfurizing tower 3 is provided with a third chamber 301, a second purified flue gas inlet 302 communicated with the third chamber 301, a second desulfurizing agent outlet 303 and a desulfurized gas outlet 304, and a third spraying device 311 used for spraying the first desulfurizing agent is arranged in the third chamber 301. The second purified flue gas inlet 302 is connected with the first purified flue gas outlet 103, the third spraying device 311 is located between the second purified flue gas inlet 302 and the desulfurized gas outlet 304 in the vertical direction, the second purified flue gas inlet 302 is located below the desulfurized gas outlet 304, and the second desulfurizer outlet 303 is located below the second purified flue gas inlet 302.

The regeneration tower 4 is provided with a fourth cavity 401, and a second desulfurizer inlet 402, a sulfur dioxide outlet 403 and a first desulfurizer outlet 405 which are communicated with the fourth cavity 401, and a heat source for heating the second desulfurizer is arranged on the regeneration tower 4. The second desulfurizer inlet 402 is connected with the second desulfurizer outlet 303, the second desulfurizer inlet 402 is located between the sulfur dioxide outlet 403 and the first desulfurizer outlet 405 in the vertical direction, and the first desulfurizer outlet 405 is located below the sulfur dioxide outlet 403.

The converter 5 has a fifth chamber 501 and a sulphur dioxide inlet 502, an oxygen containing gas inlet 504 and a sulphur trioxide outlet 503 communicating with the fifth chamber 501, the fifth chamber 501 being provided with a catalyst layer. Wherein the sulphur dioxide inlet 502 is connected to the sulphur dioxide outlet 403 and the oxygen containing gas inlet 504 is capable of being in communication with an oxygen containing gas source. The catalyst layer is located between the sulfur dioxide inlet 502 and the sulfur trioxide outlet 503 in the up-down direction, the sulfur trioxide outlet 503 is located below the sulfur dioxide inlet 502, and the oxygen-containing gas inlet 504 is located above the catalyst layer.

The absorption tower 6 is provided with a sixth chamber 601, a sulfur trioxide inlet 602 communicated with the sixth chamber 601, a second sulfuric acid outlet 603 and a tail gas outlet 605, and a fourth spraying device 606 for spraying the first sulfuric acid is arranged in the sixth chamber 601. Wherein, sulfur trioxide import 602 links to each other with sulfur trioxide export 503, and fourth spray set 606 is located between sulfur trioxide import 602 and the exhaust gas export 605 in the up-and-down direction, and sulfur trioxide import 602 is located exhaust gas export 605 below, and second sulfuric acid export 603 is located sulfur trioxide import 602 below.

When oleum is produced by using the oleum preparation device 100 according to the embodiment of the utility model, sulfur-containing flue gas is introduced into the first chamber 101 of the purification tower 1 from the sulfur-containing flue gas inlet 102, and impurities in the sulfur-containing flue gas are removed by using the purification liquid sprayed by the first spraying device 111 arranged in the first chamber 101, so as to obtain the purified flue gas. Because the first spraying device 111 is located between the sulfur-containing flue gas inlet 102 and the first purified flue gas outlet 103 in the vertical direction, and the sulfur-containing flue gas inlet 102 is located below the first purified flue gas outlet 103, the sulfur-containing flue gas introduced into the first chamber 101 flows from bottom to top, and the purified liquid sprayed from the first spraying device 111 flows from top to bottom, so that the sulfur-containing flue gas introduced into the first chamber 101 and the purified liquid sprayed from the first spraying device 111 flow in opposite directions, and further the sulfur-containing flue gas introduced into the first chamber 101 can be fully contacted with the purified liquid sprayed from the first spraying device 111, and the impurities in the sulfur-containing flue gas can be effectively removed by using the purified liquid.

The sulfur-containing flue gas can be flue gas generated by slag treatment; the purification liquid may be water; the impurities may be dust and gas dissolved in the purification liquid.

The purified flue gas is introduced into the third chamber 301 of the desulfurizing tower 3 from the second purified flue gas inlet 302, the first desulfurizing agent sprayed by the third spraying device 311 arranged in the third chamber 301 is utilized to absorb sulfur dioxide in the purified flue gas so as to obtain the desulfurized gas and the second desulfurizing agent, and the desulfurized gas is discharged from the desulfurized gas outlet. Because the third spraying device 311 is located between the second purified flue gas inlet 302 and the desulfurized gas outlet 304 in the up-down direction, the second purified flue gas inlet 302 is located below the desulfurized gas outlet 304, so that the purified flue gas introduced into the third chamber 301 flows from bottom to top, the first desulfurizing agent sprayed from the third spraying device 311 flows from top to bottom, so that the purified flue gas introduced into the third chamber 301 and the first desulfurizing agent sprayed from the third spraying device 311 flow in opposite directions, and further the purified flue gas introduced into the third chamber 301 can be in full contact with the first desulfurizing agent sprayed from the third spraying device 311, and the sulfur dioxide in the purified flue gas can be fully absorbed by the first desulfurizing agent.

The first desulfurizer can be an organic amine desulfurizer, and the first desulfurizer contains a small amount of sulfur dioxide or does not contain sulfur dioxide; the desulfurization gas is a gas containing little sulfur dioxide or even no sulfur dioxide; the second desulfurizer is a desulfurizer containing sulfur dioxide.

The second desulfurizing agent is introduced into the fourth chamber 401 of the regeneration tower 4 from the second desulfurizing agent inlet 402, and is heated by the heat source provided on the regeneration tower 4, so that sulfur dioxide gas and the first desulfurizing agent are obtained. Because the second desulfurizer inlet 402 is positioned between the sulfur dioxide outlet 403 and the first desulfurizer outlet 405 in the vertical direction, and the first desulfurizer outlet 405 is positioned below the sulfur dioxide outlet 403, the second desulfurizer is sufficiently heated by the heat source arranged on the regeneration tower 4, which is beneficial to sufficiently resolving the sulfur dioxide gas in the second desulfurizer.

The heat source may be steam. For example, the regeneration tower 4 is provided with a water jacket on the outside thereof, and steam flows through the water jacket.

The sulphur dioxide gas and the oxygen containing gas are introduced into the fifth chamber 501 of the converter 5 from a sulphur dioxide inlet 502 and an oxygen containing gas inlet 504, respectively, and the oxygen in the sulphur dioxide gas and the oxygen containing gas reacts under the catalytic action of the catalyst layer in the converter 5 to obtain sulphur trioxide gas. Because the catalyst layer is positioned between the sulfur dioxide inlet 502 and the sulfur trioxide outlet 503 in the up-down direction, the sulfur trioxide outlet 503 is positioned below the sulfur dioxide inlet 502, and the oxygen-containing gas inlet 504 is positioned above the catalyst layer, the sulfur dioxide gas and the oxygen in the oxygen-containing gas are fully mixed and contact with the catalyst layer, and the improvement of the conversion rate of the sulfur dioxide is facilitated.

The catalyst in the catalyst layer may be a vanadium catalyst; the oxygen-containing gas may be air.

The sulfur trioxide gas is introduced into the sixth chamber 601 from the sulfur trioxide inlet 602, and the sulfur trioxide gas is absorbed by the first sulfuric acid sprayed by the fourth spraying device 606 provided in the sixth chamber 601, so as to obtain the second sulfuric acid. Because the fourth spray device 606 is located between the sulfur trioxide inlet 602 and the tail gas outlet 605 in the up-down direction, the sulfur trioxide inlet 602 is located below the tail gas outlet 605, the second sulfuric acid outlet 603 is located below the sulfur trioxide inlet 602, so that the sulfur trioxide gas introduced into the sixth chamber 601 flows from bottom to top, the first sulfuric acid sprayed from the fourth spray device 606 flows from top to bottom, so that the sulfur trioxide gas introduced into the sixth chamber 601 is opposite to the first sulfuric acid sprayed from the fourth spray device 606 in the flowing direction, further, the sulfur trioxide gas introduced into the sixth chamber 601 is fully contacted with the first sulfuric acid sprayed from the fourth spray device 606, and the full absorption of the sulfur trioxide gas by utilizing the first sulfuric acid is facilitated.

The second sulfuric acid may be a fuming sulfuric acid product or may be diluted to obtain a fuming sulfuric acid product. The oleum product may be 104.5% oleum.

In the related technology, the treatment process of the sulfur-containing flue gas mainly utilizes limestone slurry to absorb sulfur dioxide in the sulfur-containing flue gas to obtain gypsum with lower added value, and the gypsum is generally subjected to stockpiling treatment, so that the stockpiled gypsum occupies large area and is easy to cause secondary pollution.

According to the fuming sulfuric acid preparation device 100 provided by the embodiment of the utility model, impurities in the sulfur-containing flue gas are effectively removed by using the purification tower, so that the harmful substances such as dust in the sulfur-containing flue gas are reduced and even removed, and the quality of the prepared fuming sulfuric acid is improved; the sulfur dioxide in the purified flue gas can be fully absorbed by utilizing the desulfurizing tower, so that the sulfur dioxide in the sulfur-containing gas can be reduced or even eliminated, and the utilization rate of the sulfur dioxide in the sulfur-containing flue gas can be improved; the regeneration tower can be used for fully resolving sulfur dioxide gas and converting the sulfur dioxide into sulfur trioxide more by using the converter, so that the utilization rate of the sulfur dioxide in the sulfur-containing flue gas can be improved; the absorption tower can be used for fully absorbing sulfur trioxide gas, so that fuming sulfuric acid products with good quality, higher economic value and convenient storage are obtained.

Therefore, the fuming sulfuric acid preparation device 100 not only solves the problem of treatment of sulfur-containing flue gas, but also prepares fuming sulfuric acid with higher economic value.

Therefore, the fuming sulfuric acid preparation device 100 provided by the embodiment of the utility model has the advantages of good sulfur-containing flue gas treatment effect, good quality of prepared fuming sulfuric acid and the like.

In addition, the purification tower 1, the desulfurization tower 3, the regeneration tower 4, the converter 5 and the absorption tower 6 in the oleum production apparatus 100 according to the embodiment of the present invention have simple structures, and the purification tower 1, the desulfurization tower and the absorption tower 6 have similar overall structures and are convenient to process and manufacture.

An oleum production apparatus 100 according to an embodiment of the present invention is described in detail below with reference to the accompanying drawings.

As shown in fig. 1 to 4, the fuming sulfuric acid production apparatus according to the embodiment of the utility model comprises a purification tower 1, a desulfurization tower 3, a regeneration tower 4, a converter 5 and an absorption tower 6.

The purification tower 1 is provided with a first chamber 101, and a sulfur-containing flue gas inlet 102 and a first purified flue gas outlet 103 which are communicated with the first chamber 101, and a first spraying device 111 for spraying a purification liquid is arranged in the first chamber 101. Wherein, the inlet 102 for sulfur-containing flue gas can be communicated with the source 107 for sulfur-containing flue gas, the first spraying device 111 is located between the inlet 102 for sulfur-containing flue gas and the first purified flue gas outlet 103 in the up-down direction, and the inlet 102 for sulfur-containing flue gas is located below the first purified flue gas outlet 103. The sulfur-containing flue gas may be flue gas generated by slag treatment.

In some embodiments, the oleum production apparatus 100 according to embodiments of the present invention further comprises a flue gas inlet duct 1071, the sulfur containing flue gas inlet 102 being connected to the flue gas inlet duct 1071, the flue gas inlet duct 1071 being capable of communicating with a sulfur containing flue gas source 107. From there, the sour flue gas enters the first chamber 101 of the scrubbing tower 1 through the sour flue gas inlet 102 via the flue gas inlet duct 1071.

In some embodiments, the oleum production apparatus 100 according to embodiments of the present invention further comprises a first spray pipe 1111, a purge liquid pump 106, a purge liquid outlet pipe 109, and a purge liquid inlet pipe 110.

The purification tower 1 further has a purification liquid inlet 104 and a purification liquid outlet 105 communicating with the first chamber 101, the purification liquid inlet 104 being connected to a first shower 1111, and the first shower 1111 being connected to the first shower 111. The cleaning liquid outlet 105 is located below the sulfurous flue gas inlet 102.

The purge liquid pump 106 has a purge liquid pump inlet 1061 and a purge liquid pump outlet 1062.

The purified liquid outlet 105 is connected to the purified liquid outlet pipe 109, and the purified liquid outlet pipe 109 is connected to the purified liquid pump inlet 1061, in other words, the purified liquid outlet 105 is connected to the purified liquid pump inlet 1061 through the purified liquid outlet pipe 109.

The purified liquid pump outlet 1062 is connected to the purified liquid inlet pipe 110, and the purified liquid inlet pipe 110 is connected to the purified liquid inlet 204. In other words, the cleaning liquid pump outlet 1062 is connected to the cleaning liquid inlet 204 through the cleaning liquid inlet pipe 110.

The purified liquid flowing out from the purified liquid outlet 105 enters the purified liquid pump 106 through the purified liquid outlet 109, and the purified liquid flowing out by the purified liquid pump 106 enters the first spraying device 111 through the purified liquid inlet 110, the purified liquid inlet 204 and the first spraying pipe 1111. Therefore, the purified liquid pump 106 is used to recycle the purified liquid, which is beneficial to improving the resource utilization rate.

In some embodiments, the oleum production apparatus 100 according to embodiments of the present invention further comprises a cooling tower 2. The cooling tower 2 has a second chamber 201, and a first purified flue gas inlet 202 and a second purified flue gas outlet 203 which are communicated with the second chamber 201, and a second spraying device 211 for spraying cooling liquid is arranged in the second chamber 201. Wherein, the first purified flue gas inlet 202 is connected with the first purified flue gas outlet 103, the second purified flue gas outlet 203 is connected with the second purified flue gas inlet 302, the second spraying device 211 is arranged between the first purified flue gas inlet 202 and the second purified flue gas outlet 203 in the up-down direction, and the first purified flue gas inlet 202 is arranged below the second purified flue gas outlet 203.

The purified flue gas before entering the cooling tower 2 is taken as the first purified flue gas, and the cooled purified flue gas flowing out from the second purified flue gas outlet 203 is taken as the second purified flue gas. The first purified flue gas is firstly introduced into the second chamber 201 of the cooling tower 2 from the first purified flue gas inlet 202, and the second spraying device 211 arranged in the second chamber 201 is used for spraying cooling liquid to cool the first purified flue gas, so as to obtain cooled purified flue gas. The cooled cleaned flue gas is then introduced into the third chamber 301 of the thionizer 3 from the second cleaned flue gas inlet 302. The cooling fluid may be water.

From this, utilize cooling tower 2 can purify the flue gas with first purification flue gas cooling for the second of temperature for first settlement temperature, this second purifies the flue gas and reenters desulfurizing tower 3 in, be favorable to the second to purify the more abundant absorption by first desulfurizer in the flue gas, not only be favorable to further reducing or even eliminate the sulfur dioxide among the sulfur-containing gas, be favorable to further improving the sulfur dioxide utilization ratio among the sulfur-containing flue gas moreover.

Preferably, the first set temperature is in the range of 30 ℃ to 60 ℃.

In some embodiments, the oleum production apparatus 100 according to embodiments of the utility model further comprises a purge flue gas duct 108, and the first purge flue gas outlet 103 is connected to the first purge flue gas inlet 202 through the purge flue gas duct 108.

In some embodiments, the oleum production apparatus 100 according to embodiments of the present invention further comprises a second spray pipe 2111, a coolant pump 206, a coolant outlet pipe 209, and a coolant inlet pipe 210. The cooling tower 2 further has a cooling liquid inlet 204 and a cooling liquid outlet 205 which are communicated with the second chamber 201, the cooling liquid inlet 204 is connected with a second spraying pipe 2111, the second spraying pipe 2111 is connected with a second spraying device 211, and the cooling liquid outlet 205 is positioned below the first purified flue gas inlet 202.

The coolant pump 206 has a coolant pump inlet 2061 and a coolant pump outlet 2062.

The coolant outlet 205 is connected to the coolant outlet 209, the coolant outlet 209 is connected to the coolant pump inlet 2061, the coolant pump outlet 2062 is connected to the coolant inlet 210, and the coolant inlet 210 is connected to the coolant inlet 204. In other words, the coolant outlet 205 is connected to the coolant pump inlet 2061 via the coolant outlet line 209, and the coolant pump outlet 2062 is connected to the coolant inlet 204 via the coolant inlet line 210.

The cooling liquid flowing out from the cooling liquid outlet 205 enters the cooling liquid pump 206 through the cooling liquid outlet pipe 209, and the cooling liquid flowing out by the cooling liquid pump 206 enters the second spraying device 211 through the cooling liquid inlet pipe 210, the cooling liquid inlet 204 and the second spraying pipe 2111. Therefore, the coolant pump 206 is used to recycle the coolant, which is beneficial to improving the resource utilization rate.

In some embodiments, the oleum production apparatus 100 according to embodiments of the present invention further comprises a heat exchanger 212, a heat exchanger connection tube 2125, a coolant inlet tube 21231, and a coolant outlet tube 21241.

The heat exchanger 212 has a first heat exchanger inlet 2121, a first heat exchanger outlet 2122, a second heat exchanger inlet 2123 and a second heat exchanger outlet 2124, the first heat exchanger inlet 2121 is in communication with the first heat exchanger outlet 2122, and the second heat exchanger inlet 2123 is in communication with the second heat exchanger outlet 2124.

The coolant pump outlet 2062 is connected to the heat exchanger connecting pipe 2125, and the heat exchanger connecting pipe 2125 is connected to the heat exchanger first inlet 2121, in other words, the coolant pump outlet 2062 is connected to the heat exchanger first inlet 2121 via the heat exchanger connecting pipe 2125. The heat exchanger first outlet 2122 is connected to the coolant inlet pipe 210.

The heat exchanger second inlet 2123 is connected to the coolant inlet line 21231, the heat exchanger second outlet 2124 is connected to the coolant outlet line 21241, and the coolant inlet line 21231 is capable of communicating with the coolant.

The cooling liquid flowing out of the cooling liquid outlet 205 enters the cooling liquid pump 206 through the cooling liquid outlet pipe 209, and then enters the heat exchanger 212 through the heat exchanger connecting pipe 2125 and the heat exchanger first inlet 2121, and the cooling liquid exchanges heat with the cooling liquid entering through the cooling liquid inlet pipe 21231 and the heat exchanger second inlet 2123 in the heat exchanger 212, so as to obtain a cooled cooling liquid; the cooled coolant then enters the second spraying device 211 through the first outlet 2122 of the heat exchanger, the coolant inlet pipe 210, the coolant inlet 204, and the second spraying pipe 2111. Therefore, the cooling of the cooling liquid is realized by the heat exchanger 212, which is beneficial to improving the cooling rate of the first purified flue gas.

In some embodiments, the oleum production apparatus 100 according to embodiments of the present invention further comprises a cooling flue gas duct 208, and the second cleaned flue gas outlet 203 is connected to the second cleaned flue gas inlet 302 via the cooling flue gas duct 208.

In some embodiments, the oleum production apparatus 100 according to embodiments of the present invention further includes a desulfurization gas pipe 3041, the desulfurization gas pipe 3041 being connected to the desulfurization gas outlet 304, the desulfurization gas being discharged from the desulfurization gas pipe 3041 through the desulfurization gas outlet 304.

In some embodiments, the oleum production apparatus 100 according to embodiments of the present disclosure further comprises a third spray pipe 3111, a second desulfurizer pump 306, a third desulfurizer pipe 307, a fourth desulfurizer pipe 308, a first desulfurizer pump 406, a first desulfurizer pipe 309, and a second desulfurizer pipe 310.

The desulfurization tower 3 further has a second desulfurization agent outlet 303 and a first desulfurization agent inlet 305 communicating with the third chamber 301, and the regeneration tower 4 further has a second desulfurization agent inlet 402 and a first desulfurization agent outlet 405 communicating with the fourth chamber 401. The first desulfurizer inlet 305 is connected with the third spray pipe 3111, the third spray pipe 3111 is connected with the third spray device 311, the second desulfurizer outlet 303 is positioned below the second purified flue gas inlet 302, and the first desulfurizer outlet 405 is positioned below the second desulfurizer inlet 402.

The first desulfurizer pump 406 has a first desulfurizer pump inlet 4061 and a first desulfurizer pump outlet 4062, the first desulfurizer outlet 405 is connected to the first desulfurizer pipe 309, the first desulfurizer pipe 309 is connected to the first desulfurizer pump inlet 4061, the first desulfurizer pump outlet 4062 is connected to the second desulfurizer pipe 310, and the second desulfurizer pipe 310 is connected to the first desulfurizer inlet 305.

The second desulfurizer pump 306 has a second desulfurizer pump inlet 3061 and a second desulfurizer pump outlet 3062.

The second desulfurizer outlet 303 is connected to a third desulfurizer pipe 307, and the third desulfurizer pipe 307 is connected to a second desulfurizer pump inlet 3061. In other words, the second desulfurization agent outlet 303 is connected to the second desulfurization agent pump inlet 3061 via the third desulfurization agent pipe 307.

The second desulfurizer pump outlet 3062 is connected to the fourth desulfurizer pipe 308, and the fourth desulfurizer pipe 308 is connected to the second desulfurizer inlet 402. In other words, the second desulfurization agent is connected to the second desulfurization agent inlet 402 through the fourth desulfurization agent pipe 308.

The first desulfurizer flowing out from the first desulfurizer outlet 405 enters the first desulfurizer pump 406 through the first desulfurizer pipe 309, and the first desulfurizer enters the third spray device 311 through the second desulfurizer pipe 310, the first desulfurizer inlet 305 and the third spray pipe 3111 by using the first desulfurizer pump 406. The second desulfurizer flowing out from the second desulfurizer outlet 303 enters the second desulfurizer pump 306 through the third desulfurizer pipe 307, and the second desulfurizer flowing out from the second desulfurizer pump 306 enters the regeneration tower 4 through the fourth desulfurizer pipe 308 and the second desulfurizer inlet 402, and is heated in the regeneration tower 4 to obtain the first desulfurizer and sulfur dioxide gas. Thus, the first desulfurizing agent pump 406 and the second desulfurizing agent pump 306 are utilized to conveniently realize the transfer of the first desulfurizing agent and the second desulfurizing agent between the desulfurizing tower 3 and the regenerating tower 4.

The purified liquid flowing out from the purified liquid outlet 105 enters the purified liquid pump 106 through the purified liquid outlet 109, and the purified liquid flowing out by the purified liquid pump 106 enters the first spraying device 111 through the purified liquid inlet 110, the purified liquid inlet 204 and the first spraying pipe 1111. Thereby realizing the cyclic utilization of the purifying liquid and being beneficial to improving the resource utilization rate.

In some embodiments, the oleum production apparatus 100 according to embodiments of the utility model further comprises a sulfur dioxide tube 505, the sulfur dioxide outlet 403 being connected to the sulfur dioxide inlet 502 by the sulfur dioxide tube 505.

In some embodiments, the oleum production apparatus 100 according to embodiments of the present invention further comprises a drying tower having a seventh chamber and an oxygen-containing gas source inlet and an oxygen-containing gas outlet in communication with the seventh chamber, the oxygen-containing gas source inlet being communicable with an oxygen-containing gas source and the oxygen-containing gas outlet being in communication with the oxygen-containing gas inlet 504.

Thereby, the oxygen-containing gas is dried by the drying tower, and the water vapor in the oxygen-containing gas is removed.

In some embodiments, the sulfur dioxide inlet 502 and the oxygen-containing gas inlet 504 share the same inlet.

Therefore, the sulfur dioxide gas and the oxygen-containing gas are fully mixed, and the conversion rate of the sulfur dioxide is improved.

The first sulfuric acid has an optimum absorption temperature, and therefore, in order to keep the first sulfuric acid within the optimum absorption temperature range, the temperature of sulfur trioxide entering the absorption tower 6 needs to be controlled. On the one hand, the flow rate of the sulfur-containing gas and the sulfur dioxide concentration may fluctuate in the actual production process. For example, when the sulfur-containing flue gas is flue gas generated by slag treatment, the flow rate of the sulfur-containing gas and the concentration of sulfur dioxide fluctuate. On the other hand, the process of reacting sulfur dioxide and oxygen to generate sulfur trioxide is an exothermic reaction. Therefore, by controlling the flow rate of the sulfur dioxide gas at the sulfur dioxide inlet 502 and the flow rate of the oxygen-containing gas at the oxygen-containing gas inlet 504, the temperature of the sulfur trioxide outlet 503, and thus the temperature of the sulfur trioxide in the absorption tower 6, can be controlled.

Preferably, a temperature measuring device is arranged at the sulfur trioxide outlet 503. Therefore, the flow rate of the oxygen-containing gas at the oxygen-containing gas inlet 504 and the temperature of the sulfur trioxide outlet 503 can be controlled in an interlocking manner, so that the reaction amount of sulfur dioxide and oxygen in the converter 5 can be controlled, and the temperature of sulfur trioxide in the absorption tower 6 can be controlled, so that the first sulfuric acid has the optimal absorption temperature.

For example, the first sulfuric acid has an optimal absorption temperature when the temperature at the sulfur trioxide outlet 503 is the second set temperature. When the temperature measured by the measuring device is lower than the second set temperature, the flow rate of the oxygen-containing gas at the oxygen-containing gas inlet 504 is increased, thereby increasing the reaction amount of sulfur dioxide and oxygen, and the temperature of the sulfur trioxide outlet 503 is made to be the second set temperature. When the temperature measured by the measuring device is higher than the second set temperature, the flow rate of the oxygen-containing gas at the oxygen-containing gas inlet 504 is reduced, thereby reducing the reaction amount of sulfur dioxide and oxygen, and the temperature of the sulfur trioxide outlet 503 is made to be the second set temperature.

Preferably, the second set temperature is less than 600 ℃.

Preferably, the first desulfurization agent pump 406 and the second desulfurization agent pump 306 are variable frequency pumps. Therefore, the flow of the sulfur dioxide gas at the sulfur dioxide inlet 502 can be controlled by controlling the flow of the first desulfurizing agent and the second desulfurizing agent in the first desulfurizing agent pump 406 and the second desulfurizing agent pump 306, so that the reaction amount of sulfur dioxide and oxygen is controlled, the temperature of sulfur trioxide in the absorption tower 6 is further controlled, and the first sulfuric acid has the optimal absorption temperature.

For example, the first sulfuric acid has an optimal absorption temperature when the temperature at the sulfur trioxide outlet 503 is the second set temperature. When the temperature measured by the measuring device is lower than the second set temperature, the flow rates of the first desulfurizing agent and the second desulfurizing agent are increased so as to increase the flow rate of the sulfur dioxide at the sulfur dioxide inlet 502, thereby increasing the reaction amount of the sulfur dioxide and the oxygen, and enabling the temperature of the sulfur trioxide outlet 503 to be the second set temperature. When the temperature measured by the measuring device is higher than the second set temperature, the flow rates of the first desulfurizing agent and the second desulfurizing agent are reduced so as to increase the flow rate of the sulfur dioxide at the sulfur dioxide inlet 502, thereby reducing the reaction amount of the sulfur dioxide and the oxygen and enabling the temperature of the sulfur trioxide outlet 503 to be the second set temperature.

In some embodiments, the oleum production apparatus 100 according to embodiments of the present invention further comprises a sulfur dioxide pipe 505, an oxygen-containing gas pipe 506, a sulfur trioxide pipe 507, and a mixed gas pipe 508, the mixed gas pipe 508 being in communication with the sulfur dioxide inlet 502 (oxygen-containing gas inlet 504), each of the sulfur dioxide pipe 505 and the oxygen-containing gas pipe 506 being connected to the mixed gas pipe 508. The sulfur trioxide outlet 503 is connected with a sulfur trioxide pipe 507, and the sulfur trioxide pipe 507 is communicated with a sulfur trioxide inlet 602.

In some embodiments, the oleum production apparatus 100 according to embodiments of the present invention further comprises an exhaust gas duct 6051, the exhaust gas outlet 605 is connected to the exhaust gas duct 6051, and the exhaust gas in the absorption tower 6 that is not absorbed by the first sulfuric acid is discharged through the exhaust gas outlet 605 through the exhaust gas duct 6051.

In some embodiments, the oleum production apparatus 100 according to embodiments of the present invention further comprises a fourth spray pipe 6061, the oleum pool 7, a second sulfuric acid pipe 705, a make-up water pipe 704, a first sulfuric acid pipe 706, a first sulfuric acid branch pipe 7061, and a first sulfuric acid main pipe 7062. The absorption tower 6 further has a first sulfuric acid inlet 604 communicating with the sixth chamber 601, the first sulfuric acid inlet 604 being connected to a fourth spray pipe 6061, and the fourth spray pipe 6061 being connected to a fourth spray means 606.

The fuming sulfuric acid pool 7 has a second sulfuric acid inlet 701, a make-up water inlet 703 and a first sulfuric acid outlet 702.

The second sulfuric acid outlet 603 is connected to a second sulfuric acid pipe 705, and the second sulfuric acid pipe 705 is connected to a second sulfuric acid inlet 701. In other words, the second sulfuric acid outlet 603 is connected to the second sulfuric acid inlet 701 through the second sulfuric acid pipe 705.

The make-up water inlet 703 is connected to a make-up water line 704, and the make-up water line 704 can be in communication with a water source.

The first sulfuric acid outlet 702 is connected to a first sulfuric acid pipe 706, and the first sulfuric acid pipe 706 is connected to the first sulfuric acid inlet 604. In other words, the first sulfuric acid outlet 702 is connected to the first sulfuric acid inlet 604 through a first sulfuric acid pipe 706.

Each of the first branch sulfuric acid pipe 7061 and the first main sulfuric acid pipe 7062 is connected to the first sulfuric acid pipe 706, and the first main sulfuric acid pipe 7062 is connected to the first sulfuric acid inlet 604.

The second sulfuric acid flowing out from the second sulfuric acid outlet 603 enters the fuming sulfuric acid pool 7 through the second sulfuric acid inlet 701, and simultaneously, the make-up water enters the fuming sulfuric acid pool 7 through the make-up water pipe 704 and the make-up water inlet 703, so that the second sulfuric acid and the make-up water are mixed in the fuming sulfuric acid pool 7 to obtain the first sulfuric acid which is fuming sulfuric acid with a set concentration.

A part of the first sulfuric acid enters the fourth spraying device 606 through the first sulfuric acid outlet 702, the first sulfuric acid pipe 706, the first sulfuric acid main pipe 7062 and the first sulfuric acid inlet 604, and the part of the first sulfuric acid is used for absorbing sulfur trioxide; the other part of the first sulfuric acid is discharged through a first sulfuric acid outlet 702, a first sulfuric acid main pipe 7062 and a first sulfuric acid branch pipe 7061, and the part of the first sulfuric acid is fuming sulfuric acid products.

Therefore, fuming sulfuric acid with set concentration can be conveniently obtained by utilizing the fuming sulfuric acid pool 7.

It will be appreciated by those skilled in the art that when the oleum production apparatus 100 is first used, the first sulfuric acid may be dilute sulfuric acid (less than 100% sulfuric acid), in which case the first branch sulfuric acid pipe 7061 is not in communication with the first main sulfuric acid pipe 7062 and no water is required to be replenished through the replenishment water pipe 704, both the first and second sulfuric acids being circulated between the oleum pool 7 and the absorption tower 6. When the fuming sulfuric acid preparation apparatus 100 is operated for a certain time and the obtained first sulfuric acid concentration reaches the set concentration, a part of the first sulfuric acid is discharged through the first sulfuric acid branch pipe 7061 to be used as a fuming sulfuric acid product, and simultaneously, the set water is supplemented to the fuming sulfuric acid tank 7 through the supplementing water pipe 704.

In some embodiments, the oleum production apparatus 100 according to embodiments of the present invention further comprises an oleum pump disposed within the oleum pool 7, the oleum pump having an oleum pump inlet and an oleum pump outlet, the oleum pump outlet being connected to the first sulfuric acid outlet 702.

Thereby, the use of a fuming sulfuric acid pump facilitates pumping of the first sulfuric acid out of the fuming sulfuric acid pool 7.

The method of operation of the oleum production apparatus 100 comprises the steps of:

introducing sulfur-containing flue gas and purifying liquid into a first chamber 101 of the purifying tower 1, and removing impurities in the sulfur-containing flue gas by using the purifying liquid so as to obtain purified flue gas;

introducing the purified flue gas and a desulfurizing agent into a third chamber 301 of a desulfurizing tower 3, and absorbing sulfur dioxide in the purified flue gas by the desulfurizing agent so as to obtain a desulfurized gas and a second desulfurizing agent;

introducing the second desulfurizer into a fourth chamber 401 of the regeneration tower 4, and heating the second desulfurizer by using a heat source of the regeneration tower 4 to regenerate the second desulfurizer so as to obtain sulfur dioxide gas and the first desulfurizer;

sulphur dioxide gas and oxygen containing gas are introduced into a fifth chamber 501 of the converter 5, the sulphur dioxide gas and oxygen in the oxygen containing gas reacting within the converter 5 to obtain sulphur trioxide gas; and

sulfur trioxide gas and the first sulfuric acid are introduced into a sixth chamber 601 of the absorption tower 6, and the sulfur trioxide gas is absorbed by the first sulfuric acid to obtain a second sulfuric acid.

In some embodiments, the sulfur dioxide concentration in the sulfur-containing flue gas is between 0.01% and 3%.

In some embodiments, the purified flue gas and the cooling liquid are introduced into the second chamber 201 of the cooling tower 2, the purified flue gas is cooled by the cooling liquid to obtain a cooled purified flue gas, and the cooled purified flue gas is introduced into the desulfurization tower 3.

Taking the oleum production apparatus 100 shown in fig. 1-4 as an example, the operation method of the oleum production apparatus 100 will be described in detail:

the sulfur-containing flue gas enters the first chamber 101 of the purification tower 1 through the flue gas inlet pipe 1071 and the sulfur-containing flue gas inlet 102, and the first spraying device 111 arranged in the first chamber 101 is used for spraying the purification liquid, so that the harmful substances in the sulfur-containing flue gas are removed by the purification liquid, and the purified flue gas is obtained. The recycle of the cleaning solution is achieved by the cleaning solution pump 106.

The first purified flue gas enters the second chamber 201 of the cooling tower 2 through the first purified flue gas outlet 103, the purified flue gas pipe 108 and the first purified flue gas inlet 202, and the second spraying device 211 arranged in the second chamber 201 is used for spraying cooling liquid, so that the first purified flue gas is cooled to a first set temperature by using the cooling liquid, and the cooled purified flue gas is obtained. The coolant pump 206 is used to circulate the coolant, and the heat exchanger 212 is used to cool the coolant.

The second purified flue gas enters the third chamber 301 of the desulfurization tower 3 through the second purified flue gas outlet 203, the cooling flue gas pipe 208 and the second purified flue gas inlet 302, the first desulfurizer is sprayed by using the third spraying device 311 arranged in the third chamber 301, so that the sulfur dioxide gas in the second purified flue gas is absorbed by using the first desulfurizer, so as to obtain a second desulfurizer and a desulfurized gas, and the desulfurized gas is discharged through the desulfurized gas outlet 304 and the desulfurized gas pipe 3041. The second desulfurizing agent is introduced into the fourth chamber 401 of the regeneration tower 4 by the second desulfurizing agent pump 306, and the second desulfurizing agent is heated by the heat source, so that sulfur dioxide gas and the first desulfurizing agent are obtained. The first desulfurizing agent is introduced into the desulfurizing tower 3 by the first desulfurizing agent pump 406.

The sulphur dioxide gas enters the fifth chamber 501 of the converter 5 through the sulphur dioxide outlet 403, the sulphur dioxide pipe 505 and the sulphur dioxide inlet 502, the oxygen-containing gas is introduced into the fifth chamber 501 of the converter 5 through the oxygen-containing gas pipe 506 and the oxygen-containing gas inlet 504, and the sulphur dioxide gas and the oxygen in the oxygen-containing gas react under the catalytic action of the catalyst layer in the converter 5 to obtain sulphur trioxide gas.

The sulfur trioxide gas is introduced into the sixth chamber 601 through a sulfur trioxide inlet 602, a sulfur trioxide pipe 507 and a sulfur trioxide inlet 602, the sulfur trioxide gas is absorbed by the first sulfuric acid which is sprayed by a fourth spraying device 606 arranged in the sixth chamber 601, so that the second sulfuric acid is obtained.

The second sulphuric acid enters the fuming sulphuric acid pool 7 through the second sulphuric acid outlet 603, the second sulphuric acid pipe 705 and the second sulphuric acid inlet 701, and simultaneously the make-up water enters the fuming sulphuric acid pool 7 through the make-up water pipe 704 and the make-up water inlet 703, so that the second sulphuric acid and the make-up water are mixed in the fuming sulphuric acid pool 7 to obtain the first sulphuric acid.

The first sulfuric acid is fuming sulfuric acid with a set concentration, a part of the fuming sulfuric acid enters the fourth spraying device 606 through the first sulfuric acid outlet 702, the first sulfuric acid pipe 706, the first sulfuric acid main pipe 7062 and the first sulfuric acid inlet 604, and the part of the first sulfuric acid is used for absorbing sulfur trioxide; the other part of the first sulfuric acid is discharged through a first sulfuric acid outlet 702, a first sulfuric acid main pipe 7062 and a first sulfuric acid branch pipe 7061, and the part of the first sulfuric acid is fuming sulfuric acid products.

The fuming sulfuric acid preparation device 100 provided by the embodiment of the utility model can be used for producing fuming sulfuric acid with higher economic added value by using sulfur-containing flue gas with low concentration, so that the problem of treatment of the flue gas with low concentration is solved, and meanwhile, the fuming sulfuric acid with high added value is produced by changing waste into valuable, so that the fuming sulfuric acid preparation device has important significance.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the utility model.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" and the like mean that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. An oleum production apparatus, comprising:

the regeneration tower is provided with a fourth cavity, and a second desulfurizer inlet, a sulfur dioxide outlet and a first desulfurizer outlet which are communicated with the fourth cavity, and a heat source for heating a second desulfurizer is arranged on the regeneration tower, wherein the second desulfurizer inlet is connected with the second desulfurizer outlet, and the second desulfurizer inlet is positioned between the sulfur dioxide outlet and the first desulfurizer outlet in the vertical direction;

the converter is provided with a fifth chamber, and a sulfur dioxide inlet, an oxygen-containing gas inlet and a sulfur trioxide outlet which are communicated with the fifth chamber, wherein a catalyst layer is arranged in the fifth chamber, the sulfur dioxide inlet is connected with the sulfur dioxide outlet, the oxygen-containing gas inlet can be communicated with an oxygen-containing gas source, and the catalyst layer is positioned between the sulfur dioxide inlet and the sulfur trioxide outlet in the vertical direction; and

2. The apparatus according to claim 1, further comprising a cooling tower having a second chamber and a first purified flue gas inlet and a second purified flue gas outlet communicating with the second chamber, wherein a second spray device for spraying a cooling liquid is provided in the second chamber, wherein the first purified flue gas inlet is connected to the first purified flue gas outlet, the second purified flue gas outlet is connected to the second purified flue gas inlet, the second spray device is located between the first purified flue gas inlet and the second purified flue gas outlet in the vertical direction, and the first purified flue gas inlet is located below the second purified flue gas outlet.

3. The oleum production apparatus of claim 2, further comprising:

4. The oleum production apparatus of claim 3, further comprising:

5. The oleum production apparatus of any of claims 1-4, further comprising:

6. The oleum production apparatus of any of claims 1-4, further comprising:

the regeneration tower is further provided with a second desulfurizer inlet and a first desulfurizer outlet which are communicated with the fourth cavity, the first desulfurizer inlet is connected with the third spray pipe, the third spray pipe is connected with the third spray device, and the first desulfurizer outlet is positioned below the second desulfurizer inlet;

7. The oleum production apparatus of any of claims 1-4, further comprising: