CN208694706U

CN208694706U - A kind of selective catalytic reduction equipment for denitrifying flue gas

Info

Publication number: CN208694706U
Application number: CN201820728871.9U
Authority: CN
Inventors: 汪茂晓
Original assignee: Ma'anshan Yu Yu Environmental Engineering Co Ltd
Current assignee: Ma'anshan Keyu Environmental Protection Equipment Co ltd
Priority date: 2018-05-16
Filing date: 2018-05-16
Publication date: 2019-04-05
Anticipated expiration: 2028-05-16

Abstract

The utility model discloses a selective catalytic reduction method for flue gas denitration device, which comprises a flue gas inlet, one end of the flue gas inlet is connected with a soot separation device, and one side of the smoke separation device is connected with a destocking reaction box through , a nitrogen oxide monitor is connected to the side of the out-of-stock reaction box. The utility model sprays the large particles of dust in the flue gas through the flue dust separation device, so that it is separated from the gas, which facilitates the removal of nitrates in the flue gas, and also solves the inconvenience of replacement or maintenance of the traditional ammonia spray grid pipe. It can prevent the ammonia injection grid tube from being worn out by the impact of the flue gas for a long time and affect the quality of the out-of-stock. It is convenient to detect and monitor the exhausted flue gas after the out-of-stock smoke through the nitrification detector, so as to prevent the nitrate in the smoke from not being removed. It is clean and flows into the atmosphere, causing harm to the atmosphere, further improving the quality of flue gas out of stock, and providing better technical support for my country's environment.

Description

A kind of selective catalytic reduction equipment for denitrifying flue gas

Technical field

The utility model relates to gas denitrifying technology field, specifically a kind of selective catalytic reduction denitrating flue gas dress It sets.

Background technique

The out of stock process for being away nitrogen oxides in combustion product gases of flue dust is selectively urged in numerous gas denitrifying technologies Changing reduction (SCR) technology is a kind of technology that current large thermal power plant denitrating flue gas is most widely used.

Chinese patent discloses a kind of production of denitrification reducing agent gas ammonia and denitrating flue gas integrated apparatus (Authorization Notice No. CN 105521706 B), which is capable of handling the boiler smoke after carrying out Self-duster, and flue gas heating uses high temperature hot-blast furnace With the mode that flue gas vapors heater and rotary flue gas heat-exchange unit combine, reaches energy-saving and reduced operating cost Purpose, but the dust of bulky grain in flue gas cannot be intercepted, bulky grain dust can not be made to separate with flue gas, and traditional spray ammonia Grating pipe is all directly to be welded in flue inner wall, since long-time is influenced to be easy to be worn by flue gas, is easily reduced its as received basis Amount, the discharge simultaneously for flue gas is not monitored, does not know that whether the itrated compound in flue gas is removed completely, is easy to make Itrated compound leakage current enters in atmosphere, damages to atmosphere.Therefore, those skilled in the art provide a kind of selective catalysis also Former method equipment for denitrifying flue gas, to solve the problems mentioned in the above background technology.

Summary of the invention

The purpose of this utility model is to provide a kind of selective catalytic reduction equipment for denitrifying flue gas, to solve above-mentioned back The problem of being proposed in scape technology.

To achieve the above object, the utility model provides the following technical solutions:

A kind of selective catalytic reduction equipment for denitrifying flue gas, including gas inlet, one end perforation of the gas inlet It is connected with dust separating device, the side perforation of the dust separating device is connected with out of stock reaction chamber, the out of stock reaction chamber Side be connected with nitrogen oxides monitor, and the other side of out of stock reaction chamber is connected with air preheater, the nitrogen oxides One end of monitor is connected with mixer, and the side of the air preheater, which penetrates through, is connected with pressure fan, and air preheater Other side perforation is connected with electric precipitator, and the side of the mixer is provided with FIC controller, and the side of mixer passes through The perforation of FIC controller is connected with liquefied ammonia surge tank, and the other side of the mixer is connected with dilution air, the liquefied ammonia surge tank Side perforation be connected with liquefied ammonia holding vessel, the upper end perforation of the electric precipitator is connected with niter air somascope, the niter air inspection One end perforation for looking into instrument is connected with second gas solenoid valve, and is equipped with first between niter air somascope and second gas solenoid valve Gas solenoid valve, the upper end of the first gas solenoid valve are connected with net gas outlet.

As a further solution of the present invention: the dust separating device includes water pipe, demister, spray head and absorption Layer, the water pipe is fixedly mounted on the inside of dust separating device, and the lower end perforation of water pipe is provided at least four spray heads, institute The upper end for stating water pipe is fixedly installed demister, and the lower end of the spray head is fixedly installed with adsorption layer, and the adsorption layer is a kind of The component of active carbon material.

The out of stock reaction chamber includes sliding rail, cowling panel, ammonia-spraying grid as a further solution of the present invention, Pipe, SCR reactor and deflector, the ammonia-spraying grid pipe are mounted on the inside of out of stock reaction chamber, and the lower end of ammonia-spraying grid pipe It is fixedly installed sliding rail, the upper end of the ammonia-spraying grid pipe is equipped with cowling panel, and the lower end of the sliding rail is provided with SCR reaction Device, the deflector are mounted on the inner bottom of out of stock reaction chamber.

The lower end of the ammonia-spraying grid pipe is provided with sliding seat as a further solution of the present invention, described de- The outside of pin reaction chamber correspond to and is provided with maintenance door at the position of ammonia-spraying grid pipe, and the ammonia-spraying grid pipe and out of stock reaction chamber lead to It crosses sliding rail and sliding seat is slidably connected.

As a further solution of the present invention, the nitrogen oxides monitor, dilution air, FIC controller, give Blower, electric precipitator, niter air somascope, first gas solenoid valve and second gas solenoid valve are electrically connected with external power supply.

One end of the dilution air is provided with air hose, and dilution air as a further solution of the present invention, It is penetrated through and is connected by air hose with mixer, the junction of the dilution air and mixer is provided with sealing ring.

One end of the first gas solenoid valve is provided with flange, flange as a further solution of the present invention, Outside be provided with sealing ring, the first gas solenoid valve is exported with net gas and is fixedly connected by flange.

Compared with prior art, the utility model has the beneficial effects that

1, the utility model sprays the bulky grain dust in flue gas by dust separating device, makes itself and gas point From, first the bulky grain dust in flue gas is adsorbed with adsorption layer, recycle spray head water leaching is carried out to it, make bulky grain dust It is separated with gas, convenient for being purged to the itrated compound in flue gas, while can also prevent the bulky grain dust in flue dust to smoke pipe It causes damages, avoids the problem of bulky grain dust results in blockage to ammonia-spraying grid pipe.

2, ammonia-spraying grid pipe is replaced or is repaired by the way that maintenance door and sliding rail are convenient, due to the ammonia-spraying grid pipe range time Impact by flue gas be easy to cause ammonia-spraying grid pipe to be seriously worn, in addition, traditional ammonia-spraying grid pipe is all to bore directly above Hole is used for spray ammonia, for a long time using being easy to cause it to block, causes spray ammonia uneven, and ammonia-spraying grid in the market Pipe is directly welded in flue inner wall, all inconvenient for dismounting, replacement and maintenance, therefore can using sliding rail and sliding seat So that ammonia-spraying grid pipe is changed to detachable, not only facilitates and it is repaired and is replaced, but also will not influence out of stock device as received basis Amount.

3, detection monitoring is carried out to the flue gas of discharge after cigarette is out of stock by the way that itrated compound detector is convenient, prevented in flue dust Itrated compound is not removed completely, has residual itrated compound to be discharged into atmosphere, to have an impact to atmosphere, if discovery has residual to nitrify When object, by second gas solenoid valve do not remove clean flue gas be sent into out of stock reaction chamber again carry out it is secondary out of stock, into One step improves the out of stock quality of flue gas, provides superior technique guarantee to the environment in China.

Detailed description of the invention

Fig. 1 is a kind of structural schematic diagram of selective catalytic reduction equipment for denitrifying flue gas.

Fig. 2 is a kind of structural schematic diagram of dust separating device in selective catalytic reduction equipment for denitrifying flue gas.

Fig. 3 is a kind of structural schematic diagram of out of stock reaction chamber in selective catalytic reduction equipment for denitrifying flue gas.

In figure: 1, gas inlet；2, dust separating device；3, out of stock reaction chamber；4, nitrogen oxides monitor；5, wind is diluted Machine；6, mixer；7, FIC controller；8, liquefied ammonia surge tank；9, pressure fan；10, liquefied ammonia holding vessel；11, air preheater；12, Electric precipitator；13, itrated compound detector；14, first gas solenoid valve；15, net gas outlet；16, second gas solenoid valve；17, Water pipe；18, demister；19, spray head；20, adsorption layer；21, sliding rail；22, cowling panel；23, ammonia-spraying grid pipe；24, SCR reacts Device；25, deflector.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work Every other embodiment obtained, fall within the protection scope of the utility model.

Please refer to Fig. 1~3, in the utility model embodiment, a kind of selective catalytic reduction equipment for denitrifying flue gas, including Gas inlet 1, one end perforation of gas inlet 1 are connected with dust separating device 2, and the side of dust separating device 2 penetrates through connection There is out of stock reaction chamber 3, the side of out of stock reaction chamber 3 is connected with nitrogen oxides monitor 4, and the other side of out of stock reaction chamber 3 connects It is connected to air preheater 11, one end of nitrogen oxides monitor 4 is connected with mixer 6, and the side of air preheater 11, which penetrates through, to be connected It is connected to pressure fan 9, and the other side perforation of air preheater 11 is connected with electric precipitator 12, the side of mixer 6 is provided with FIC Controller 7, and the side of mixer 6 is connected with liquefied ammonia surge tank 8 by the perforation of FIC controller 7, the other side of mixer 6 connects It is connected to dilution air 5, the side perforation of liquefied ammonia surge tank 8 is connected with liquefied ammonia holding vessel 10, and the upper end of electric precipitator 12, which penetrates through, to be connected It is connected to niter air somascope 13, one end perforation of niter air somascope 13 is connected with second gas solenoid valve 16, and niter air somascope 13 First gas solenoid valve 14 is installed between second gas solenoid valve 16, the upper end of first gas solenoid valve 14 is connected with net gas Outlet 15.

Flue gas is separated for convenience, the bulky grain dust in removing flue gas, in the present embodiment, it is preferred that flue dust Separator 2 includes water pipe 17, demister 18, spray head 19 and adsorption layer 20, and water pipe 17 is fixedly mounted on dust separating device 2 Inside, and the lower end perforation of water pipe 17 is provided at least four spray heads 19, the upper end of water pipe 17 is fixedly installed demister 18, spray First 19 lower end is fixedly installed with adsorption layer 20, and adsorption layer 20 is a kind of component of active carbon material.

Out of stock processing is carried out to flue gas for convenience, prevents the itrated compound in flue gas from having an impact to atmosphere, the present embodiment In, it is preferred that out of stock reaction chamber 3 includes sliding rail 21, cowling panel 22, ammonia-spraying grid pipe 23, SCR reactor 24 and deflector 25, Ammonia-spraying grid pipe 23 is mounted on the inside of out of stock reaction chamber 3, and the lower end of ammonia-spraying grid pipe 23 is fixedly installed sliding rail 21, sprays ammonia The upper end of grating pipe 23 is equipped with cowling panel 22, and the lower end of sliding rail 21 is provided with SCR reactor 24, and deflector 25 is mounted on out of stock The inner bottom of reaction chamber 3.

Ammonia-spraying grid pipe 23 is replaced or repaired for convenience, in the present embodiment, it is preferred that ammonia-spraying grid pipe 23 Lower end is provided with sliding seat, and the outside of out of stock reaction chamber 3 corresponds to and is provided with maintenance door at the position of ammonia-spraying grid pipe 23, sprays ammonia lattice Bank tube 23 is slidably connected with out of stock reaction chamber 3 by sliding rail 21 and sliding seat.

In order to facilitate the out of stock efficiency of enhancing flue gas, in the present embodiment, it is preferred that nitrogen oxides monitor 4, dilution air 5, FIC controller 7, pressure fan 9, electric precipitator 12, niter air somascope 13, first gas solenoid valve 14 and second gas solenoid valve 16 are electrically connected with external power supply.

In order to facilitate mixing efficiency is accelerated, out of stock speed is improved, in the present embodiment, it is preferred that one end of dilution air 5 is set It is equipped with air hose, and dilution air 5 and mixer 6 are penetrated through by air hose and connected, the junction of dilution air 5 and mixer 6 is arranged There is sealing ring.

In order to facilitate the discharge direction after control fume treatment, in the present embodiment, it is preferred that first gas solenoid valve 14 One end is provided with flange, and sealing ring is provided on the outside of flange, and first gas solenoid valve 14 and net gas outlet 15 are solid by flange Fixed connection.

The working principle of the utility model is: firstly, being carried out by dust separating device 2 to the bulky grain dust in flue gas It sprays, separates it with gas, first the bulky grain dust in flue gas is adsorbed with adsorption layer 20, recycle spray head 19 to it Water leaching is carried out, bulky grain dust is separated with gas, convenient for being purged to the itrated compound in flue gas, can prevent in flue dust Bulky grain dust cause damages to smoke pipe, also avoid the problem of bulky grain dust results in blockage to ammonia-spraying grid pipe 23, water Pipe 17 and the perforation of outer connected with water faucet connect, then, by maintenance door and sliding rail 21 it is convenient to ammonia-spraying grid pipe 23 carry out replacement or Maintenance when needing replacing, opens maintenance door, and one end of ammonia-spraying grid pipe 23 is provided with knob, utilizes 21 He of sliding rail by knob Ammonia-spraying grid pipe 23 is pulled out out of stock reaction chamber 3 by sliding seat, convenient for replacing or repairing to it, prevent ammonia-spraying grid pipe 23 because it is long when Between worn by flue gas and influence out of stock quality, finally, by itrated compound detector 13 it is convenient after cigarette is out of stock to the flue gas of discharge Detection monitoring is carried out, prevents the itrated compound in flue dust from not removing completely, has residual itrated compound to be discharged into atmosphere, thus to atmosphere It has an impact, if discovery has residual itrated compound, itrated compound detector 13 can carry the information to external controller (external controller For the common controller of out of stock device in the market), external controller will issue instruction and close first gas solenoid valve 14, and beat Second gas solenoid valve 16 is opened, out of stock reaction chamber 3 is sent into clean flue gas is not removed by second gas solenoid valve 16 again Interior progress is secondary out of stock, further improves the out of stock quality of flue gas, provides superior technique guarantee to the environment in China.

It is obvious to a person skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and And without departing substantially from the spirit or essential attributes of the utility model, it can realize that this is practical new in other specific forms Type.Therefore, in all respects, the present embodiments are to be considered as illustrative and not restrictive, this is practical new The range of type is indicated by the appended claims rather than the foregoing description, it is intended that containing for the equivalent requirements of the claims will be fallen in All changes in justice and range are embraced therein.It should not treat any reference in the claims as limiting Related claim.

In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art The other embodiments being understood that.

Claims

1. A selective catalytic reduction flue gas denitration device, comprising a flue gas inlet (1), characterized in that one end of the flue gas inlet (1) is connected with a soot separation device (2), and the soot separation An out-of-stock reaction box (3) is throughly connected to one side of the device (2), a nitrogen oxide monitor (4) is connected to the side of the out-of-stock reaction box (3), and the other side of the out-of-stock reaction box (3) is connected to There is an air preheater (11), one end of the nitrogen oxide monitor (4) is connected with a mixer (6), one side of the air preheater (11) is connected with a blower (9), and An electrostatic precipitator (12) is connected through the other side of the air preheater (11), an FIC controller (7) is arranged on one side of the mixer (6), and one side of the mixer (6) passes through The FIC controller (7) is connected through a liquid ammonia buffer tank (8), the other side of the mixer (6) is connected with a dilution fan (5), and one side of the liquid ammonia buffer tank (8) is connected through There is a liquid ammonia storage tank (10), the upper end of the electrostatic precipitator (12) is connected with a nitrous gas inspection instrument (13), and one end of the nitrate gas inspection instrument (13) is throughly connected with a second gas solenoid valve ( 16), and a first gas solenoid valve (14) is installed between the nitrate gas inspection instrument (13) and the second gas solenoid valve (16), and the upper end of the first gas solenoid valve (14) is connected with a clean gas outlet (15).

2 . A selective catalytic reduction flue gas denitrification device according to claim 1 , wherein the soot separation device ( 2 ) comprises a water pipe ( 17 ), a mist eliminator ( 18 ), and a spray head ( 19 ). 3 . and the adsorption layer (20), the water pipe (17) is fixedly installed inside the smoke and dust separation device (2), and the lower end of the water pipe (17) is provided with at least four nozzles (19) penetrating through the water pipe (17). A mist eliminator (18) is fixedly arranged at the upper end, and an adsorption layer (20) is fixedly installed at the lower end of the spray head (19), and the adsorption layer (20) is a component made of activated carbon.

3. A selective catalytic reduction flue gas denitration device according to claim 1, wherein the out-of-stock reaction box (3) comprises a slide rail (21), a rectifier plate (22), an ammonia injection grille Pipe (23), SCR reactor (24) and deflector (25), the ammonia injection grid pipe (23) is installed inside the out-of-stock reaction box (3), and the ammonia injection grid pipe (23) A slide rail (21) is fixedly arranged at the lower end, a rectifier plate (22) is installed at the upper end of the ammonia injection grid pipe (23), and an SCR reactor (24) is arranged at the lower end of the slide rail (21). The baffle plate (25) is installed at the inner bottom end of the out-of-stock reaction box (3).

4. A selective catalytic reduction flue gas denitrification device according to claim 3, characterized in that the lower end of the ammonia injection grid pipe (23) is provided with a sliding seat, and the out-of-stock reaction box (3) An inspection door is provided at a position corresponding to the ammonia injection grid pipe (23) on the outer side of the casing.

5. A selective catalytic reduction flue gas denitrification device according to claim 1, wherein the nitrogen oxide monitor (4), the dilution fan (5), the FIC controller (7), the blower (9), the electrostatic precipitator (12), the nitrate gas inspection instrument (13), the first gas solenoid valve (14) and the second gas solenoid valve (16) are all electrically connected to an external power supply.

6. A selective catalytic reduction flue gas denitrification device according to claim 1, wherein one end of the dilution fan (5) is provided with an air duct, and the dilution fan (5) and the mixer (6) ) are connected through an air duct, and a sealing ring is provided at the connection between the dilution fan (5) and the mixer (6).

7. A selective catalytic reduction flue gas denitrification device according to claim 1, wherein one end of the first gas solenoid valve (14) is provided with a flange, and the outer side of the flange is provided with a sealing ring , the first gas solenoid valve (14) is fixedly connected with the clean gas outlet (15) through a flange.