CN104984642A - Flue gas desulfurization, denitrification and dust removal integrating system - Google Patents
Flue gas desulfurization, denitrification and dust removal integrating system Download PDFInfo
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- CN104984642A CN104984642A CN201510410905.0A CN201510410905A CN104984642A CN 104984642 A CN104984642 A CN 104984642A CN 201510410905 A CN201510410905 A CN 201510410905A CN 104984642 A CN104984642 A CN 104984642A
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- flue gas
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- denitration
- ozone
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 80
- 239000003546 flue gas Substances 0.000 title claims abstract description 80
- 239000000428 dust Substances 0.000 title claims abstract description 49
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 40
- 230000023556 desulfurization Effects 0.000 title claims abstract description 40
- 238000010521 absorption reaction Methods 0.000 claims abstract description 28
- 239000012495 reaction gas Substances 0.000 claims abstract description 25
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 22
- 150000004767 nitrides Chemical class 0.000 claims abstract description 10
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims description 44
- 239000007921 spray Substances 0.000 claims description 23
- 230000003647 oxidation Effects 0.000 claims description 20
- 239000000956 alloy Substances 0.000 claims description 12
- 239000007789 gas Substances 0.000 claims description 12
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 11
- 229910052760 oxygen Inorganic materials 0.000 claims description 11
- 239000001301 oxygen Substances 0.000 claims description 11
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 claims description 10
- 239000000779 smoke Substances 0.000 claims description 10
- 239000002250 absorbent Substances 0.000 claims description 9
- 230000002745 absorbent Effects 0.000 claims description 9
- 229910052755 nonmetal Inorganic materials 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 235000019738 Limestone Nutrition 0.000 claims description 6
- 239000006028 limestone Substances 0.000 claims description 6
- 238000002485 combustion reaction Methods 0.000 claims description 4
- 239000004743 Polypropylene Substances 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 238000010828 elution Methods 0.000 claims description 3
- 229910000856 hastalloy Inorganic materials 0.000 claims description 3
- -1 polypropylene Polymers 0.000 claims description 3
- 229920001155 polypropylene Polymers 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 25
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 230000009467 reduction Effects 0.000 abstract description 2
- 238000007599 discharging Methods 0.000 abstract 1
- 150000003568 thioethers Chemical class 0.000 abstract 1
- 238000000034 method Methods 0.000 description 15
- 230000008569 process Effects 0.000 description 11
- 239000003344 environmental pollutant Substances 0.000 description 9
- 231100000719 pollutant Toxicity 0.000 description 9
- 239000003517 fume Substances 0.000 description 5
- 230000010354 integration Effects 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 239000000443 aerosol Substances 0.000 description 4
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000010440 gypsum Substances 0.000 description 3
- 229910052602 gypsum Inorganic materials 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 150000001412 amines Chemical class 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 238000010531 catalytic reduction reaction Methods 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
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- MGWGWNFMUOTEHG-UHFFFAOYSA-N 4-(3,5-dimethylphenyl)-1,3-thiazol-2-amine Chemical compound CC1=CC(C)=CC(C=2N=C(N)SC=2)=C1 MGWGWNFMUOTEHG-UHFFFAOYSA-N 0.000 description 1
- 244000025254 Cannabis sativa Species 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 241000208125 Nicotiana Species 0.000 description 1
- 235000002637 Nicotiana tabacum Nutrition 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- XOCUXOWLYLLJLV-UHFFFAOYSA-N [O].[S] Chemical compound [O].[S] XOCUXOWLYLLJLV-UHFFFAOYSA-N 0.000 description 1
- HIVLDXAAFGCOFU-UHFFFAOYSA-N ammonium hydrosulfide Chemical compound [NH4+].[SH-] HIVLDXAAFGCOFU-UHFFFAOYSA-N 0.000 description 1
- 235000021168 barbecue Nutrition 0.000 description 1
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- 229910052757 nitrogen Inorganic materials 0.000 description 1
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
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- 230000008635 plant growth Effects 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
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- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Treating Waste Gases (AREA)
Abstract
The invention relates to a flue gas desulfurization, denitrification and dust removal integrating system. The system comprises an absorption tower, a desulfurization device and a denitrification and dust removal device, wherein the desulfurization device is arranged in the absorption tower and is used for removing sulfides entering flue gas from a flue gas inlet to form a first reaction gas; the denitrification and dust removal device is arranged in the absorption tower and is used for removing nitrides and dust from the first reaction gas to form a second reaction gas; the second reaction gas is exhausted from a flue gas outlet. The removing technology of NO(X) is changed into oxidization from reduction, so that the NO(X) is well applied in a low-temperature flue gas-purifying area after wet desulphurization, and NO in the flue gas is oxidized into NO2 by discharging equipment of the denitrification and dust removal device; meanwhile, dust in the flue gas is removed by electrostatic principle. The desulfurization, denitrification and dust removal integrating system provided by the invention is low in investment, simple, low in energy consumption, and low in operation cost, does not cause secondary pollution, and is easily popularized and utilized in a flue gas treatment system.
Description
Technical field
The invention belongs to fume treatment technical field, particularly relate to a kind of flue gas desulfurization denitration dust-removing integrated system.
Background technology
Atmosphere pollution is exactly refer to mainly containing the oxygen (accounting for 21%) that the nitrogen (accounting for 78%) be beneficial to plant growth and human body, animal need in normal air, also containing a small amount of carbon dioxide < 0.03% > and other gases.When this does not belong to gas or the material of Atmospheric components, after sulfide, nitrogen oxide, dust, organic matter etc. enter air, atmosphere pollution just there occurs.Atmosphere pollution causes primarily of the activity of people, and the source of atmospheric pollution mainly contains: plant emissions, vehicle exhaust, land reclamation and cultivation are burnt the grass on waste land, forest fire, kitchen smoke (comprising roadside barbecue), dust (comprising construction site) etc.Atmosphere pollution can be divided into two large classes by its existence.One is aerosol state pollutant, and another kind is gaseous state pollutant.Aerosol state pollutant mainly contains dust, tobacco juice drips, mist, depositing dust, floating dust, suspension etc.Gaseous state pollutant mainly contains the oxygen sulfur compound based on sulfur dioxide, the oxynitrides based on nitrogen dioxide, the hydrocarbon that the hydrocarbon based on carbon dioxide and carbon, hydrogen combine.Not only containing inorganic pollution in air, and containing organic pollution.
For reducing pollutant (the such as SO in fuel combustion generation flue gas
2, NO
x) concentration of emission has multiple desulphurization and denitration technology.Desulfur technology most widely used is at present Limestone-gypsum Wet Flue Gas Desulfurization Process technique, and this technology adopts lime stone as absorbent, and key reaction is carried out in absorption tower.Denitration technology most widely used is at present SCR SCR technology, this technology NH
3as reducing agent, the former flue gas section of the high temperature after economizer arranges the equipment such as SCR reactor, catalyst, soot blower, and in flue gas, mixing adds NH in advance
3, NH
3and NO
x(NO and NO
2) under the effect of certain temperature and catalyst, reaction generates N
2, thus realize NO
xremoval.
Desulphurization denitration is important step in fume treatment, and the removal of two kinds of pollutants organically can be combined and realize integration, be a direction of green technology development all the time.Desulphurization denitration technology realizes integration very large difficulty.First, be set up at cloth, denitrating system is arranged in the high-temperature flue gas section at boiler economizer rear, and desulphurization system is arranged near air-introduced machine after funnel, belongs to low-temperature flue gas; On fume treatment object, existing denitration technology can only carry out in the former smoke-gas area of high temperature, cannot arrange in the former flue gas district of wet desulphurization entrance low temperature or wet desulphurization low exit temperature neat stress district.Abroad in current proposed integrated technique, mainly use organic amine to SO
2and NO
xcarry out selective absorbing and catalytic reduction, basically can only process in high-temperature flue gas, to NO
xremoval or reducing process, cause whole system to arrange so quite complicated, investment, energy consumption, operating cost are quite high, are difficult to penetration and promotion.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of flue gas desulfurization denitration dust-removing integrated system.
The technical scheme that the present invention solves the problems of the technologies described above is as follows: a kind of flue gas desulfurization denitration dust-removing integrated system, for the treatment of sulfide, nitride and dust contained in the flue gas of combustion system discharge; It comprises:
Absorption tower, described absorption tower comprises smoke inlet and exhanst gas outlet;
Desulfurizer, is arranged in described absorption tower; Described desulfurizer for removing the sulfide in the flue gas that entered by smoke inlet, to form the first reaction gas;
Denitration and dust arrester, be arranged in described absorption tower; Described denitration and dust arrester for removing nitride in the first reaction gas and dust, to form the second reaction gas; Nitride oxide in first reaction gas is NO by described denitration and dust arrester
2, and with elution device by NO
2removing; Second reaction gas is discharged by exhanst gas outlet.
The present invention's flue gas desulfurization denitration dust-removing integrated system as above, further, described flue gas is low-temperature flue gas, and flue-gas temperature is at 45 DEG C to 65 DEG C.
The present invention's flue gas desulfurization denitration dust-removing integrated system as above, further, described denitration and dust arrester comprise:
Ozone occurs and dedusting negative electrode, and described ozone occurs and dedusting negative electrode is barrel-shaped structure;
Ozone generation anode, described ozone generation anode is arranged in the tubular chamber of ozone generation and dedusting negative electrode; Described ozone occurs and forms ozone generating section between dedusting negative electrode and ozone generation anode;
Dedusting anode, described dedusting anode is barrel-shaped structure, is set in ozone and occurs and dedusting cathode external; Described ozone occurs and forms denitrating flue gas reaction zone and dedusting area between dedusting negative electrode and dedusting anode;
Apparatus of oxygen supply, described apparatus of oxygen supply provides air or oxygen to ozone generating section.
The present invention's flue gas desulfurization denitration dust-removing integrated system as above, further, described ozone occurs and dedusting negative electrode is made up of alloy material; Ozone generation anode is made up of alloy material or conductive nonmetal material; Dedusting anode is made up of alloy material or conductive nonmetal material.
The present invention's flue gas desulfurization denitration dust-removing integrated system as above, further, described alloy is 1.4529 stainless steels, C276 Hastelloy; Described conductive nonmetal material is conducting polypropylene, electroconductive frp.
The present invention's flue gas desulfurization denitration dust-removing integrated system as above, further, described denitration and dust arrester also comprise demister, and described demister is for removing the aqueous vapor in the second reaction gas.
The present invention's flue gas desulfurization denitration dust-removing integrated system as above, further, described desulfurizer comprises:
Stock tank, described in be arranged on the bottom on described absorption tower, for absorbing the sulfide in flue gas;
Spray equipment, described spray equipment is arranged on the top of described stock tank;
Circulation line, one end of circulation line is communicated with described stock tank, and the other end is communicated with described spray equipment;
Circulating pump, is arranged on described circulation line;
Oxidation spray gun, described oxidation spray gun inserts described stock tank;
Oxidation fan, be arranged on described absorption tower outside, oxidation spray gun is communicated with oxidation fan through air hose.
The present invention's flue gas desulfurization denitration dust-removing integrated system as above, further, described stock tank utilizes lime stone as absorbent, or utilizes NH
3as absorbent.
The invention has the beneficial effects as follows: present system is by NO
xremoval technology change oxidation into by reduction, make it the low temperature neat stress region that can well be applied in wet desulphurization rear, utilize and be arranged in discharge equipment in exhaust gases passes oxidation generation NO is carried out to the NO in flue gas
2, thus make nitrogen-containing pollutant formation be absorbed by slurries and to form stable nitrate anion.Meanwhile, electrostatic principle is utilized to remove the dust flowed through in flue gas.Inventive desulfurization denitration dust collecting integral system investments is few, system is simple, energy consumption is low, operating cost is low, non-secondary pollution source, is easy to apply in existing smoke processing system.
Accompanying drawing explanation
The flue gas desulfurization denitration dust-removing integrated system schematic of one that Fig. 1 provides for the embodiment of the present invention;
A kind of denitration that Fig. 2 provides for the embodiment of the present invention and dust arrester horizontal profile schematic diagram;
A kind of denitration that Fig. 3 provides for the embodiment of the present invention and dust arrester sectional elevation schematic diagram.
In accompanying drawing, the list of parts representated by each label is as follows:
1, desulfurizer, 11, stock tank, 12, spray equipment, 13, circulating pump, 14, smoke inlet, 2, denitration and dedusting area, 21, denitration and dust arrester, 211, ozone generation anode, 212, ozone occurs and dedusting negative electrode, 213, dedusting anode, 214, ozone generating section, 215, denitrating flue gas reaction zone and dedusting area, 22, demister, 23, exhanst gas outlet, 3, absorption tower.
Detailed description of the invention
Be described principle of the present invention and feature below in conjunction with accompanying drawing, example, only for explaining the present invention, is not intended to limit scope of the present invention.
Desulphurization denitration is important step in fume treatment, and the removal of two kinds of pollutants organically can be combined and realize integration, be a direction of green technology development all the time.Desulfur technology most widely used is at present Limestone-gypsum Wet Flue Gas Desulfurization Process technique, and this technology adopts lime stone as absorbent, and key reaction is carried out in absorption tower.Most widely used denitration technology is SCR SCR technology, this technology NH
3as reducing agent, the former flue gas section of the high temperature after economizer arranges the equipment such as SCR reactor, catalyst, soot blower.Above-mentioned desulfur technology and denitration technology realize integratedly having very large difficulty.First, be set up at cloth, denitrating system is arranged in the high-temperature flue gas section at boiler economizer rear, and desulphurization system is arranged near air-introduced machine after funnel, belongs to low-temperature flue gas; On fume treatment object, existing denitration technology can only carry out in the former smoke-gas area of high temperature, cannot arrange in the former flue gas district of wet desulphurization entrance low temperature or wet desulphurization low exit temperature neat stress district.Abroad in current proposed integrated technique, mainly use organic amine to SO
2and NO
xcarry out selective absorbing and catalytic reduction, basically can only process in high-temperature flue gas, to NO
xremoval or reducing process, cause whole system to arrange so quite complicated, investment, energy consumption, operating cost are quite high, are difficult to penetration and promotion.
The embodiment of the present invention needs to solve desulphurization denitration technology cannot the problem of integration.
Fig. 1 illustrates the flue gas desulfurization denitration dust-removing integrated system of one that the embodiment of the present invention provides, sulfide, nitride and dust contained in the flue gas that this system is discharged for the treatment of combustion system; It comprises:
Absorption tower 3, described absorption tower comprises smoke inlet 14 and exhanst gas outlet 23;
Desulfurizer 1, is arranged in described absorption tower 3; Described desulfurizer 1 for removing the sulfide in the flue gas that entered by smoke inlet 14, to form the first reaction gas;
Denitration and dust arrester 2, be arranged in described absorption tower 3; Described denitration and dust arrester 2 for removing nitride in the first reaction gas and dust, to form the second reaction gas; Nitride oxide in first reaction gas is NO by described denitration and dust arrester
2, and with elution device by NO
2removing; Second reaction gas is discharged by exhanst gas outlet 23.
State in the flue gas desulfurization denitration dust-removing integrated system of embodiment on the invention, described flue gas is low-temperature flue gas, and flue-gas temperature is at 45 DEG C to 65 DEG C.
The operation principle of the flue gas desulfurization denitration dust-removing integrated system of the above embodiment of the present invention is as follows:
Present system comprises desulfurization absorption, low-temperature oxidation denitration and dedusting three key devices, first carries out desulfurization, then carries out denitration and dedusting.Flue gas enters absorption tower, containing SO from adsorption tower smoke entrance
2, NO
x, the pollutant such as dust flue gas after wet desulphurization washing, then by denitration and dust arrester oxidized residual the SO in flue gas
2and NO
x, make NO
xin can not dissolve portions turn for by liquid absorption, thus further removal can be able to.
The reduction reaction that present system changes existing denitration technology is oxidation reaction, thus makes to realize denitration in low-temperature flue gas district.Achieve sulphur denitration dust collecting to organically combine, save the area, reduce SR, can whole implementation.Run dependence to main frame little, the desulphurization and denitration that can realize under any operating mode normally runs.
State in the specific implementation process of flue gas desulfurization denitration dust-removing integrated system of embodiment on the invention, as shown in Figures 2 and 3, described denitration and dust arrester 21 comprise:
Ozone occurs and dedusting negative electrode 212, and described ozone occurs and dedusting negative electrode is barrel-shaped structure;
Ozone generation anode 211, described ozone generation anode is arranged in the tubular chamber of ozone generation and dedusting negative electrode; Described ozone occurs and forms ozone generating section 214 between dedusting negative electrode and ozone generation anode;
Dedusting anode 213, described dedusting anode is barrel-shaped structure, is set in ozone and occurs and dedusting cathode external; Described ozone occurs and forms denitrating flue gas reaction zone and dedusting area 215 between dedusting negative electrode and dedusting anode;
Apparatus of oxygen supply, described apparatus of oxygen supply provides air or oxygen to ozone generating section 214.
State in the specific implementation process of flue gas desulfurization denitration dust-removing integrated system of embodiment on the invention, described ozone occurs and dedusting negative electrode is made up of alloy material; Ozone generation anode is made up of alloy material or conductive nonmetal material; Dedusting anode is made up of alloy material or conductive nonmetal material.Preferably, described alloy is 1.4529 stainless steels, C276 Hastelloy; Described conductive nonmetal material is conducting polypropylene, electroconductive frp.
First denitration and dust arrester discharge to the first reaction gas entered wherein, produce ozone or to oxygen molecule ionization, make SO
2, the material such as NO is oxidized, NO is formed easily by NO that water washing is got off
2, finally absorb removal by spray or liquid film mode, thus reach denitration object.In discharge process, in the first reaction gas by gaseous molecular (as SO
3) aerosol that formed can be destroyed, and has certain aerosol removal effect.When first reaction gas of dust-laden is by denitration dust collecting device, under electrostatic interaction, dust is adsorbed on dedusting anode, thus dust is removed.Present system adopts low-temperature oxidation denitration technology, and the ozone utilizing electric discharge to produce can, to denitrating flue gas, utilize electrostatic principle to remove the dust in flue gas simultaneously.
State in the specific implementation process of flue gas desulfurization denitration dust-removing integrated system of embodiment on the invention, described denitration and dust arrester also comprise demister 22, and described demister 22 is for removing the aqueous vapor in the second reaction gas.As shown in Figure 1, denitration and dust arrester 21 and demister 22 are arranged on denitration and the dedusting area 2 on absorption tower 3.
State in the specific implementation process of flue gas desulfurization denitration dust-removing integrated system of embodiment on the invention, described desulfurizer 1 comprises:
Stock tank 11, described in be arranged on the bottom on described absorption tower 3, for absorbing the sulfide in flue gas; In a more preferred embodiment, described stock tank utilizes lime stone as absorbent, or utilizes NH
3as absorbent.
Spray equipment 12, described spray equipment is arranged on the top of described stock tank 11;
Circulation line, one end of circulation line is communicated with described stock tank, and the other end is communicated with described spray equipment;
Circulating pump 13, is arranged on described circulation line;
Oxidation spray gun, described oxidation spray gun inserts described stock tank;
Oxidation fan, be arranged on described absorption tower outside, oxidation spray gun is communicated with oxidation fan through air hose.
During the work of inventive desulfurization device, spray equipment carries out spray washing to flue gas, SO wherein
2be rapidly absorbed into stock tank, by the oxidation spray gun of Operation system setting, utilize oxygen the SO in slurries
3 2-be oxidized to SO
4 2-, form stable calcium sulfate (i.e. gypsum) further with lime stone, reach the object of desulfurization.In addition, NH can also be used
3generate sulphur ammonium as absorbent and carry out desulfurization.
The invention solves desulfur denitrate dust collecting integration and low-temperature denitration technical barrier, can reduce investment outlay significantly, reduce SR, and non-secondary pollution, can not impact system cloud gray model, can work under any operating mode.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. a flue gas desulfurization denitration dust-removing integrated system, for the treatment of sulfide, nitride and dust contained in the flue gas of combustion system discharge; It is characterized in that, comprising:
Absorption tower, described absorption tower comprises smoke inlet and exhanst gas outlet;
Desulfurizer, is arranged in described absorption tower; Described desulfurizer for removing the sulfide in the flue gas that entered by smoke inlet, to form the first reaction gas;
Denitration and dust arrester, be arranged in described absorption tower; Described denitration and dust arrester for removing nitride in the first reaction gas and dust, to form the second reaction gas; Nitride oxide in first reaction gas is NO by described denitration and dust arrester
2, and with elution device by NO
2removing; Second reaction gas is discharged by exhanst gas outlet.
2. flue gas desulfurization denitration dust-removing integrated system according to claim 1, is characterized in that, described flue gas is low-temperature flue gas, and flue-gas temperature is at 45 DEG C to 65 DEG C.
3. flue gas desulfurization denitration dust-removing integrated system according to claim 1 and 2, is characterized in that, described denitration and dust arrester comprise:
Ozone occurs and dedusting negative electrode, and described ozone occurs and dedusting negative electrode is barrel-shaped structure;
Ozone generation anode, described ozone generation anode is arranged in the tubular chamber of ozone generation and dedusting negative electrode; Described ozone occurs and forms ozone generating section between dedusting negative electrode and ozone generation anode;
Dedusting anode, described dedusting anode is barrel-shaped structure, is set in ozone and occurs and dedusting cathode external; Described ozone occurs and forms denitrating flue gas reaction zone and dedusting area between dedusting negative electrode and dedusting anode;
Apparatus of oxygen supply, described apparatus of oxygen supply provides air or oxygen to ozone generating section.
4. flue gas desulfurization denitration dust-removing integrated system according to claim 3, is characterized in that, described ozone occurs and dedusting negative electrode is made up of alloy material; Ozone generation anode is made up of alloy material or conductive nonmetal material; Dedusting anode is made up of alloy material or conductive nonmetal material.
5. flue gas desulfurization denitration dust-removing integrated system according to claim 4, is characterized in that, described alloy is 1.4529 stainless steels, C276 Hastelloy; Described conductive nonmetal material is conducting polypropylene, electroconductive frp.
6. flue gas desulfurization denitration dust-removing integrated system according to claim 3, is characterized in that, described denitration and dust arrester also comprise demister, and described demister is for removing the aqueous vapor in the second reaction gas.
7. flue gas desulfurization denitration dust-removing integrated system according to claim 1, is characterized in that, described desulfurizer comprises:
Stock tank, described in be arranged on the bottom on described absorption tower, for absorbing the sulfide in flue gas;
Spray equipment, described spray equipment is arranged on the top of described stock tank;
Circulation line, one end of circulation line is communicated with described stock tank, and the other end is communicated with described spray equipment;
Circulating pump, is arranged on described circulation line;
Oxidation spray gun, described oxidation spray gun inserts described stock tank;
Oxidation fan, be arranged on described absorption tower outside, oxidation spray gun is communicated with oxidation fan through air hose.
8. flue gas desulfurization denitration dust-removing integrated system according to claim 7, is characterized in that, described stock tank utilizes lime stone as absorbent, or utilizes NH
3as absorbent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510410905.0A CN104984642A (en) | 2015-07-14 | 2015-07-14 | Flue gas desulfurization, denitrification and dust removal integrating system |
Applications Claiming Priority (1)
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Application publication date: 20151021 |