CN102716651A - Desulfurization and denitrification integral smoke gas purification treatment system and desulfurization and denitrification integral smoke gas purification treatment process - Google Patents
Desulfurization and denitrification integral smoke gas purification treatment system and desulfurization and denitrification integral smoke gas purification treatment process Download PDFInfo
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- CN102716651A CN102716651A CN2012102131677A CN201210213167A CN102716651A CN 102716651 A CN102716651 A CN 102716651A CN 2012102131677 A CN2012102131677 A CN 2012102131677A CN 201210213167 A CN201210213167 A CN 201210213167A CN 102716651 A CN102716651 A CN 102716651A
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- Prior art keywords
- desulfurization
- flue gas
- oxidation
- absorption
- denitrification
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- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 141
- 230000023556 desulfurization Effects 0.000 title claims abstract description 130
- 238000000034 method Methods 0.000 title claims abstract description 37
- 239000000779 smoke Substances 0.000 title claims abstract description 21
- 238000000746 purification Methods 0.000 title abstract description 14
- 238000010521 absorption reaction Methods 0.000 claims abstract description 142
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 136
- 230000003647 oxidation Effects 0.000 claims abstract description 134
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 88
- 239000013535 sea water Substances 0.000 claims abstract description 28
- 230000001590 oxidative effect Effects 0.000 claims abstract description 14
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 119
- 239000003546 flue gas Substances 0.000 claims description 119
- 239000007788 liquid Substances 0.000 claims description 102
- 238000002156 mixing Methods 0.000 claims description 51
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims description 47
- 238000003860 storage Methods 0.000 claims description 34
- 238000004140 cleaning Methods 0.000 claims description 32
- 238000011084 recovery Methods 0.000 claims description 31
- 239000003517 fume Substances 0.000 claims description 29
- 238000002203 pretreatment Methods 0.000 claims description 15
- 238000005273 aeration Methods 0.000 claims description 14
- 238000007599 discharging Methods 0.000 claims description 13
- 238000005507 spraying Methods 0.000 claims description 11
- 238000010079 rubber tapping Methods 0.000 claims description 9
- 239000007921 spray Substances 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 238000011010 flushing procedure Methods 0.000 claims description 7
- 239000007789 gas Substances 0.000 claims description 7
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 230000003197 catalytic effect Effects 0.000 claims description 2
- 238000001914 filtration Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 4
- 239000000126 substance Substances 0.000 abstract description 2
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 45
- 239000000243 solution Substances 0.000 description 24
- 230000009286 beneficial effect Effects 0.000 description 10
- 230000005484 gravity Effects 0.000 description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 8
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 8
- 238000009826 distribution Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 6
- 239000003344 environmental pollutant Substances 0.000 description 6
- 231100000719 pollutant Toxicity 0.000 description 6
- 229910052717 sulfur Inorganic materials 0.000 description 5
- 239000011593 sulfur Substances 0.000 description 5
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 229910002651 NO3 Inorganic materials 0.000 description 3
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 3
- 239000005864 Sulphur Substances 0.000 description 3
- 230000002378 acidificating effect Effects 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 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 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000005272 metallurgy Methods 0.000 description 2
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- AKEJUJNQAAGONA-UHFFFAOYSA-N sulfur trioxide Chemical compound O=S(=O)=O AKEJUJNQAAGONA-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 241000628997 Flos Species 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 239000007853 buffer solution Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- -1 sulfate radical Chemical class 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Abstract
The invention relates to a desulfurization and denitrification integral smoke gas purification treatment system and a desulfurization and denitrification integral smoke gas purification treatment process, in particular to an integral smoke gas purification treatment system and an integral smoke gas purification treatment process adopting seawater to realize desulfurization and denitrification. The system comprises a raw smoke gas input system, an absorption system and a clean smoke gas exhaust system in mutual connection, and also comprises a raw smoke gas oxidation system and a desulfurization and denitrification agent integral function system, wherein the raw smoke gas oxidation system is connected with the raw smoke gas input system, and the desulfurization and denitrification agent integral function system is connected with the absorption system. According to the process, the system is utilized for oxidizing the smoke gas, and then, the integral purification and absorption treatment is carried out. The system and the process provided by the invention have the advantages that the system setting and the technical flow process are simple and optimized, the integral smoke gas desulfurization and denitrification are realized, any other substance does not need to be added in the application process, except cyclically utilized seawater and air, the energy-saving and environment-friendly effects are obvious, the green and clean treatment of the smoke gas is realized, and the system and the process are suitable for being applied to the field of industrial tail gas purification treatment, particularly in regions with seawater application convenience, and are particularly suitable for being popularized and applied.
Description
Technical field
The present invention relates to a kind of desulfurization and denitrification integral system for cleaning fume and purification process technique thereof, the desulfurization and denitrification integral system for cleaning fume and the purification process technique thereof that especially utilize seawater to carry out.
Background technology
At present, in thermal power plant, metallurgy, chemical industry, useless admittedly garbage disposal and other industrial tail gas pollutant with sulphur, nitrogen oxide (SO
2, NOx) be main, more to the improvement technology of these flue gas pollutants, for example: administer sulfur dioxide (SO
2) limestone-gypsum method, ammonia process, two alkaline process, SCR (SCR) method, SNCR (SNCR) method, the low nitrogen burning method of administering nitrogen oxide (NOx), perhaps, more than the combination of several kinds of denitration technologies; But, need in different devices, different workshop section and flow process, carry out respectively for removing fully basically all of the sulphur in the flue gas, nitrogen pollutant, simultaneously, take big quantity space, consume the mass energy material.
Be energy savings; A lot of smoke eliminators that are provided with by the sea use cheap seawater to purify, and have reduced a large amount of construction costs and operating cost; But the sea water desulfuration device is follow-up to be utilized seawater to carry out denitrating flue gas to handle and but also do not have mature technology to occur.
Therefore, demand researching and developing out a kind of high-efficiency desulfurization denitration technology urgently, can in same technological process, carry out; Need develop the technology of utilizing seawater to carry out the high-efficiency desulfurization denitration especially; To realize energy-saving consumption-reducing, reduce financial cost, and fully reach the high standard requirement of environmental protection.
Summary of the invention
The objective of the invention is; Problem to prior art exists provides a kind of desulfurization and denitrification integral system for cleaning fume and purification process technique thereof, and the integrated high-efficiency that in same technological process, carries out sulfur-bearing, nitrogen pollutant synchronously removes; Realize the low-loss of energy and material; Practice thrift financial cost, simultaneously, ensure to reach high-level environmental requirement.
The technical scheme that the present invention deals with problems is: a kind of desulfurization and denitrification integral system for cleaning fume; Comprise interconnective former flue gas input system, absorption system and clean flue gas emission; Wherein, also comprise the former flue gas oxidative system that is connected with said former flue gas input system, the desulfurization denitrification agent comprehensive function system that is connected with said absorption system.
Further; Said desulfurization denitrification agent comprehensive function system comprises interconnective desulphurization denitration agent feeding device, absorption liquid retracting device, recovery device; Wherein, said desulphurization denitration agent feeding device is connected with said absorption system respectively with the absorption liquid retracting device.
Further, said desulphurization denitration agent feeding device comprises interconnective desulfurization denitrification agent storage device, desulfurization denitrification agent delivery pump and desulfurization denitrification agent conveyance conduit; Said absorption liquid retracting device comprises interconnective absorption liquid discharge tube and absorption liquid recovery pond; Said recovery device comprises interconnective oxidation pre-treatment device and tapping equipment; Said oxidation pre-treatment device comprises that the outer air that is provided with of aeration tube, oxidation pond that is provided with in oxidation pond, the oxidation pond is imported blower fan and the air input channel is used in oxidation; Wherein, Said air input blower fan communicates with the external world, and said oxidation is connected with said aeration tube with the air input channel; Said tapping equipment comprises vent channels, and said vent channels is connected with said oxidation pond; Said absorption liquid recovery pond is connected with said oxidation pond; Said absorption system comprises the absorption tower; Said absorption tower is connected with said absorption liquid discharge tube, desulfurization denitrification agent conveyance conduit respectively.
Further, said former flue gas input system comprises interconnective former flue gas input booster fan and former flue gas input channel; Said former flue gas oxidative system is the ozone oxidation system, comprises interconnective ozone with air input channel, air compressor and ozone generator, and said ozone generator is connected with said former flue gas input channel; In the absorption tower of said absorption system, be disposed with liquid storage tank, spray equipment and demister from the bottom to top; Said spray equipment comprises a plurality of spraying layers, and said demister comprises an above demister and is arranged on the demister flushing water layer of demister top; Bottom, said absorption tower inlet is connected with said former flue gas input channel; The outlet of top, said absorption tower is connected with said clean flue gas emission; Said spraying layer is connected with the desulfurization denitrification agent conveyance conduit; Said liquid storage tank is connected with said absorption liquid discharge tube; Preferably, be provided with drain valve in the junction of said liquid storage tank and absorption liquid discharge tube, absorption liquid is opened drain valve after reaching finite concentration in liquid storage tank, the discharging absorption liquid.
Preferably, said absorption liquid recovery pond and said desulfurization denitrification agent storage device are same device mixing pit; The below of said liquid storage tank is connected with the top of said mixing pit, and the middle top of said mixing pit is connected with the top of said oxidation pond, and the top of said oxidation pond is connected with said vent channels.
Preferably; Desulfurization and denitrification integral system for cleaning fume of the present invention also comprises the acidity adjustment device; Said acidity adjustment device comprises interconnective regulator solution delivery pump and regulator solution conveyance conduit; Wherein, be provided with the regulator solution filter in said regulator solution delivery pump porch, said regulator solution conveyance conduit is connected with said mixing pit; Be provided with the desulfurization denitrification agent filter in the porch of said desulfurization denitrification agent delivery pump; In the former flue gas input channel of porch, bottom, said absorption tower, be provided with the ozone distributor; Preferably, said ozone distributor is the ozone even distribution device, can ozone be ejected in the former flue gas input channel, and ozone is evenly distributed in former flue gas input channel, thereby is beneficial to that ozone fully contacts with nitric oxide in the former flue gas and with its oxidation.
The present invention also provides a kind of desulfurization and denitrification integral gas cleaning treatment process, comprises the steps:
(1) flue gas input
The former flue gas of former flue gas input system input gets into absorption system after the oxidation of former flue gas oxidative system;
(2) smoke absorption purifies
The flue gas that gets into absorption system is after the desulfurization denitrification agent that desulfurization denitrification agent comprehensive function system carries purifies the absorption processing, and the clean flue gas of gained gets into clean flue gas emission, and the gained absorption liquid gets into desulfurization denitrification agent comprehensive function system and handles and recycle;
(3) clean fume emission
The clean flue gas that gets into clean flue gas emission in the said step (2) discharges.
Further, in said step (1): in said former flue gas input system, former flue gas is carried through booster fan pressurization back, and inlet gets into the absorption tower from the bottom, absorption tower after the ozone oxidation that former flue gas oxidative system is carried in former flue gas input channel; Wherein, said ozone is made through ozone generator after ozone gets into the air compressor processed compressed with the air input channel by air again, and gained ozone is carried through the ozone distributor that is arranged in the former flue gas input channel; Preferably, the former flue gas of being carried is the flue gas through the deduster dedusting.
Further; In said step (2): after the flue gas after the oxidation gets into the absorption tower of absorption system; The desulfurization denitrification agent that sprays with spraying layer from bottom to top counter current contacting mutually purifies absorption, and is up again through after the demister demist, continues the up demister that passes and washes water layer and get into clean flue gas emission; Sulfur in smoke and nitrogen oxide are removed fully, and the absorption liquid entering desulfurization denitrification agent comprehensive function system that gets in the liquid storage tank of bottom, absorption tower handles and recycle; Wherein, said desulfurization denitrification agent is provided by the desulphurization denitration agent feeding device, and said desulfurization denitrification agent delivers into the absorption tower by the desulfurization denitrification agent delivery pump through the desulfurization denitrification agent conveyance conduit after filtering from desulfurization denitrfying agent storage device; The gained absorption liquid flows in the absorption liquid recovery pond through the absorption liquid discharge tube.
Further, in said step (2): said absorption liquid recovery pond and said desulfurization denitrification agent storage device are same device mixing pit; The regulator solution that mixed liquor in the said mixing pit is carried through the acidity adjustment device is regulated the acidity continued as the desulfurization denitrification agent recycle; Mixed liquor in the said mixing pit carries out discharging after the oxidation pre-treatment through recovery device; Wherein, in said acidity adjustment device, regulator solution is input in the mixing pit by the regulator solution delivery pump after the regulator solution filter filters; In said recovery device; Mixed liquor carries out oxidation by the oxidation pre-treatment device; Discharge by tapping equipment; The mixed liquor oxidation is carried out in the oxidation pond of oxidation pre-treatment device, the abundant catalytic oxidation of air that aeration tube is carried in mixed liquor and the oxidation pond, and said air is imported with the air input channel through oxidation by the outer air input blower fan that is provided with of oxidation pond; Mixed liquor after the oxidation pond oxidation is through the vent channels discharging of tapping equipment.
Further, said desulfurization denitrification agent is a seawater; Said regulator solution is a seawater; The pH value of absorption liquid is 3.5 when following, in absorption liquid discharge tube inflow absorption liquid recovery pond in the said liquid storage tank; PH of mixed value in the said mixing pit is 5.0 ~ 5.4; Said mixed liquor in oxidation pond through oxidation pre-treatment reach the pH value greater than 7 after the discharging.
Said liquid storage tank is above said mixing pit, and said absorption liquid utilizes the potential difference between said liquid storage tank and the mixing pit to flow in the mixing pit; Said mixing pit is above said oxidation pond, and said mixed liquor utilizes the potential difference between said mixing pit and the oxidation pond to flow in the oxidation pond; Said oxidation pond is above vent channels, and the mixed liquor in the oxidation pond after oxidation utilizes oxidation pond to enter in the relevant marine site with potential difference between vent channels.
The natural alkaline components (being mainly sodium chloride, sulfate and a certain amount of soluble carbon hydrochlorate) that desulfurization and denitrification integral system for cleaning fume of the present invention and purification process technique thereof make full use of in the seawater absorbs the acidic oxide (main component sulfur dioxide, sulfur trioxide, nitric oxide, nitrogen dioxide etc.) in the flue gas, and makes the NO in the former flue gas be oxidized to NO through the oxidation to former flue gas in the said step (1)
2Thereby, make nitrogen oxide fully purified to absorb and be protected; Realize that through desulfurization denitrification agent comprehensive function system the circulation of desulfurization denitrification agent is supplied with and abundant the recovery handled, make environment protecting obtain highly ensureing; In addition, because of the pH value of general seawater is 7.5 ~ 8.3, natural basicity is about 1.2 ~ 2.5mmol/L; Therefore make natural sea-water have the ability of very strong soda acid buffer capacity and absorption acidic oxide, and through generating harmless sulfate and nitrate after the natural alkaline components absorption of seawater, wherein; In said step (2), the absorption cleaning product has been carried out the oxidation recovery through recovery device, the acidic materials oxidations such as inferior sulfate radical that it is contained; Thereby effectively avoided the discharging of acid; Simultaneously, sulfate is that the natural component of seawater can not produce any influence to seawater, and nitrate is dissolved in a large amount of seawater by fully dilution; So former flue gas is that sulfate and nitrate improve a little through the seawater that flows back to the ocean after the desulphurization denitration purified treatment of the present invention; But when it left the floss hole certain distance, the difference of this concentration can disappear very soon, and then had ensured that seawater is not contaminated; Use the present invention and carry out the flue gas desulfurization and denitrification purified treatment, desulfuration efficiency is greater than 95%, and out of stock efficient is greater than 80%.To sum up, in the whole process of desulphurization denitration, except that seawater and air, not adding any other material, really realized green desulfurization denitration and discharging, is the flue gas treating process of clean and environment-friendly.
Compared with prior art, the invention has the beneficial effects as follows:
1, system of the present invention novel and reasonable design, technological process simple optimizing and clean environment firendly have realized that fully incorporate flue gas desulfurization is out of stock, synchronous high-efficiency removes sulfur-bearing, nitrogen pollutant in same process system flow process, and the later stage product has been carried out abundant processing;
2, innovative design of the present invention; In the whole process of using, except that recycle seawater and air, do not have any other material and add and loss; Effects of energy conservation and environmental protection is remarkable; Financial cost significantly reduces, and has realized that the green that flue gas is handled cleans, and is suitable in dischargings such as metallurgy, generatings with sulphur, nitrogen oxide (SO
2, NOx) pollutant is that use in main industrial tail gas purified treatment field, particularly, especially be fit to apply in seawater convenient application area.
Description of drawings
Fig. 1 is the structural representation of desulfurization and denitrification integral flue gas purification system of the present invention.
Shown in the figure: the former flue gas input of 1-booster fan, the former flue gas input channel of 2-; 3-ozone is used the air input channel, 4-air compressor, 5-ozone generator; The 6-absorption tower, 7-liquid storage tank, 8-spraying layer, 9-demister, 10-demister flushing water layer, bottom, 11-absorption tower inlet; 12-desulfurization denitrification agent delivery pump, 13-desulfurization denitrification agent conveyance conduit; 14-absorption liquid discharge tube; The 15-oxidation pond, the 16-aeration tube, 17-air input blower fan, the air input channel is used in the 18-oxidation; The 19-vent channels; The 20-mixing pit; 21-regulator solution delivery pump, 22-regulator solution conveyance conduit, 23-regulator solution filter; 24-desulfurization denitrification agent filter; The outlet of top, 25-absorption tower.
The specific embodiment
Embodiment 1
As shown in Figure 1; A kind of desulfurization and denitrification integral system for cleaning fume; Comprise former flue gas input system, former flue gas oxidative system, absorption system, clean flue gas emission (not shown), desulfurization denitrification agent comprehensive function system, acidity adjustment device, wherein:
Said former flue gas input system comprises interconnective former flue gas input booster fan 1 and former flue gas input channel 2;
Said former flue gas oxidative system is the ozone oxidation system, comprises interconnective ozone with air input channel 3, air compressor 4 and ozone generator 5, and ozone generator 5 is connected with former flue gas input channel 2;
Said absorption system comprises absorption tower 6; The liquid storage tank 7, spray equipment and the demister that in absorption tower 6, set gradually from the bottom to top; Said spray equipment comprises 2 spraying layers 8, and said demister comprises a demister 9 and is arranged on the demister flushing water layer 10 of demister 9 tops; Bottom, absorption tower inlet 10 is connected with former flue gas input channel 2; Top, absorption tower outlet 11 is connected with said clean flue gas emission;
Said desulfurization denitrification agent comprehensive function system comprises interconnective desulphurization denitration agent feeding device, absorption liquid retracting device, recovery device; Said desulphurization denitration agent feeding device comprises interconnective desulfurization denitrification agent storage device, desulfurization denitrification agent delivery pump 12 and desulfurization denitrification agent conveyance conduit 13, is provided with desulfurization denitrification agent filter 24 in the porch of desulfurization denitrification agent delivery pump 12; Said absorption liquid retracting device comprises interconnective absorption liquid discharge tube 14 and absorption liquid recovery pond; Said recovery device comprises interconnective oxidation pre-treatment device and tapping equipment; Said oxidation pre-treatment device comprises that the aeration tube 16, the oxidation pond 15 outer air input blower fans 17 that are provided with and the oxidation that are provided with in oxidation pond 15, the oxidation pond 15 are with air input channel 18; Wherein, Air input blower fan 17 communicates with the external world, and oxidation is connected with aeration tube 16 with air input channel 18; Said tapping equipment comprises vent channels 19, and vent channels 19 is connected with oxidation pond 15; Said absorption liquid recovery pond and said desulfurization denitrification agent storage device are same device mixing pit 20; Mixing pit 20 is connected with oxidation pond 15;
Said acidity adjustment device comprises interconnective regulator solution delivery pump 21 and regulator solution conveyance conduit 22, wherein, is provided with regulator solution filter 23 in regulator solution delivery pump 21 porch, and regulator solution conveyance conduit 22 is connected with mixing pit 20;
Absorption tower 6 is connected with absorption liquid discharge tube 14, desulfurization denitrification agent conveyance conduit 13 respectively, and spraying layer 8 is connected with desulfurization denitrification agent conveyance conduit 13; Liquid storage tank 7 is connected with absorption liquid discharge tube 14.
In the foregoing description:
Junction at liquid storage tank 7 and absorption liquid discharge tube 14 is provided with the drain valve (not shown), opens drain valve after absorption liquid reaches finite concentration in liquid storage tank 7, the discharging absorption liquid;
The below of liquid storage tank 7 is connected with the top of mixing pit 20, and the absorption liquid that is beneficial in the liquid storage tank 7 utilizes potential difference to advance mixing pit 20 by flow by gravity; The middle top of mixing pit 20 and the top of oxidation pond 15, the mixed liquor that is beneficial in the mixing pit 20 utilizes potential difference to advance oxidation pond 15 by flow by gravity; The top of oxidation pond 15 is connected with vent channels 19, and the mixed liquor that is beneficial to after the oxidation processes in the oxidation pond 20 utilizes potential difference to advance vent channels 19 by flow by gravity, simultaneously, also is beneficial to the mixed liquors that get in the oxidation pond 15 and obtains abundant oxidation;
It is that nitrogen dioxide provides guarantee that the setting of said former flue gas oxidative system makes the oxidation of nitric oxide in the former flue gas, thereby for nitrogen-containing oxide is fully absorbed guarantee is provided; Simultaneously;, the bottom, absorption tower is provided with ozone distributor (not shown) in entering the mouth the former flue gas input channel 2 at 11 places; Said ozone distributor is the ozone even distribution device; Can ozone be ejected in the former flue gas input channel 2, ozone is evenly distributed in former flue gas input channel 2, thereby fully contact with nitric oxide in the former flue gas and guarantee further is provided for ozone its oxidation;
The setting of said desulfurization denitrification agent comprehensive function system; Comprehensively possessed desulfurization denitrification agent functions of physical supply, absorption liquid processing and restore funcitons; Integrate multinomial function; Fully saved Installed capital cost, when having practiced thrift lot of materials, be beneficial to and fully improved systemic-function and running efficiency of system; And said absorption liquid recovery pond and said desulfurization denitrification agent storage device are same device mixing pit 20; Then when ensureing the desulfurization denitrification agent supply; Also be beneficial to the recycle desulfurization denitrification agent, reach the effect of energy savings, and efficient processing the in the subsequent set of absorption liquid provided convenience; Also practice thrift the setting that repeats of relevant device, reached the effect of energy-saving consumption-reducing equally; In said recovery device, the setting of said aeration tube 16 can be carried out a large amount of aerations in oxidation pond 15, guarantees SO
3 2-In the time of by abundant oxidation, be beneficial to the CO in the liquid
2Discharge oxidation pond 15, and a large amount of aerations also are beneficial to the oxygen content that increases in the oxidation pond, thereby provide safeguard for qualified discharge;
The quantity of said spraying layer 8, demister 9, demister flushing water layer 10, desulfurization denitrification agent delivery pump 12 and each filter can be provided with relevant needs according to the component content of actual flue gas.
Use desulfurization and denitrification integral system for cleaning fume of the present invention and carry out the flue gas desulfurization and denitrification purified treatment, comprise the steps:
(1) flue gas input
What former flue gas input system was imported gets into absorption system after the oxidation of former flue gas oxidative system;
In said former flue gas input system, carry through former flue gas booster fan 1 pressurization back through the former flue gas of deduster dedusting, inlet 11 gets into from the bottom, absorption tower after the ozone oxidation that former flue gas oxidative system is carried in former flue gas input channel 2; Wherein, Said ozone is made through ozone generator 5 after ozone gets into air compressor 4 processed compressed with air input channel 3 by air again; Gained ozone evenly distributes through the ozone distributors that are arranged in the former flue gas input channel 2, thereby ozone is fully contacted and with its oxidation with nitric oxide in the former flue gas;
The oxidation equation formula is following:
NO+O
3→NO
2+O
2
(2) smoke absorption purifies
After flue gas in the step (1) after the oxidation gets into absorption tower 6; The desulfurization denitrification agent that sprays with spraying layer 8 from bottom to top is after counter current contacting purifies absorption mutually, and up again through after demister 9 demists, the up demister flushing water layer 10 that passes gets into clean flue gas exhaust system; Sulfur in smoke and nitrogen oxide are removed fully; Absorption liquid falls into liquid storage tank 7, and gained absorption liquid pH value is 3.5 o'clock, opens drain valve; Absorption liquid is flowed in the mixing pit 20 through absorption liquid discharge tube 14, and said absorption liquid utilizes the potential difference between liquid storage tank 7 and the mixing pit 20 to flow in the mixing pit 20;
In this process, the desulphurization reaction equation is following:
SO
2+H
2O→H
2SO
3→H
++HSO
3 -
HSO
3 -+1/2O
2→SO
4 -+H
+；
The denitration reaction equation is following:
NO
2+H
2O→HNO
3→NO
3 -+H
+；
Wherein, said desulfurization denitrification agent is provided by the desulphurization denitration agent feeding device, and said desulfurization denitrification agent delivers into absorption tower 6 by desulfurization denitrification agent delivery pump 21 through desulfurization denitrification agent conveyance conduit 13 from mixing pit 20 after desulfurization denitrification agent filter 24 filters;
The regulator solution that mixed liquor in the mixing pit 20 is carried through the acidity adjustment device is regulated acidity; In said acidity adjustment device; Regulator solution is input in the mixing pit 20 through regulator solution conveyance conduit 22 by regulator solution delivery pump 21 after regulator solution filter 23 filters; Make the pH of mixed value in the mixing pit keep 5.0, mixed liquor can be continued as the desulfurization denitrification agent recycle;
After the mixed liquor in the mixing pit 20 reached certain liquid level, mixed liquor carried out discharging after the oxidation pre-treatment through recovery device; At first; Mixed liquor utilizes the potential difference between mixing pit 20 and the oxidation pond 15 to flow in the oxidation pond 15; In oxidation pond 15, mixed liquor fully contacts with the air that aeration tube 16 is carried and by fully oxidation, mixed liquor reaches the pH value through oxidation in oxidation pond 15 be after 7; Mixed liquor after oxidation utilizes the potential difference of 19 of oxidation pond 15 and vent channels to advance vent channels 19 by flow by gravity, and then enters in the relevant marine site; The used air of oxidation is imported with air input channel 18 through oxidation by air input blower fan 17;
(3) clean fume emission
The clean flue gas that gets into clean flue gas emission in the said step (2) discharges.
In above-mentioned technical process:
In step (1); Because of nitric oxide production reproducibility is better than sulfur dioxide, and its electronic structure also makes the nitric oxide production speed of ozone oxidation be far longer than the speed of oxidation sulfur dioxide, about some thousandths of second; Therefore; Sulfur in smoke can not influence ozone to nitric oxide production oxidation, and nitric oxide can not cause the waste of raw material ozone by abundant oxidation the time yet;
In step (2), in recovery device, through a large amount of aeration SO
3 2-In the time of by abundant oxidation, the CO in the liquid
2Also driven discharge, and, increase the oxygen content of liquid in the oxidation pond, thereby effectively avoided the discharging of acid, for qualified discharge provides guarantee, also assurance is provided for keeping the seawater balance;
In step (2), said desulfurization denitrification agent is a seawater; Said regulator solution is a seawater;
In whole technical process, except that seawater and air, do not add any other material, really realized the green desulfurization denitration and the discharging of flue gas.
Use the present invention and carry out the flue gas desulfurization and denitrification purified treatment, desulfuration efficiency reaches 95%, and denitration efficiency reaches 80%.
Embodiment 2
As shown in Figure 1, a kind of setting of desulfurization and denitrification integral system for cleaning fume and distribution are with embodiment 1.
Use desulfurization and denitrification integral system for cleaning fume of the present invention and carry out the flue gas desulfurization and denitrification purified treatment,, remove following steps with embodiment 1:
In the step (2), gained absorption liquid pH value is 2.5 o'clock, opens drain valve, and absorption liquid is flowed in the mixing pit 20 through absorption liquid discharge tube 14; Make the pH of mixed value in the mixing pit keep 5.4 through the acidity adjustment device; Mixed liquor reaches the pH value through oxidation in oxidation pond 15 be after 7.5, and the mixed liquor after oxidation utilizes the potential difference of 19 of oxidation pond 15 and vent channels to advance in the vent channels 19 by flow by gravity.
Use the present invention and carry out the flue gas desulfurization and denitrification purified treatment, desulfuration efficiency reaches 98%, and denitration efficiency reaches 90%.
Embodiment 3
As shown in Figure 1, a kind of setting of desulfurization and denitrification integral system for cleaning fume and distribution are with embodiment 1.
Use desulfurization and denitrification integral system for cleaning fume of the present invention and carry out the flue gas desulfurization and denitrification purified treatment,, remove following steps with embodiment 1:
In the step (2), gained absorption liquid pH value is 3.0 o'clock, opens drain valve, and absorption liquid is flowed in the mixing pit 20 through absorption liquid discharge tube 14; Make the pH of mixed value in the mixing pit keep 5.2 through the acidity adjustment device; Mixed liquor reaches the pH value through oxidation in oxidation pond 15 be after 7.3, and the mixed liquor after oxidation utilizes the potential difference of 19 of oxidation pond 15 and vent channels to advance in the vent channels 19 by flow by gravity.
Use the present invention and carry out the flue gas desulfurization and denitrification purified treatment, desulfuration efficiency reaches 96%, and denitration efficiency reaches 88%.
Embodiment 4
As shown in Figure 1, a kind of setting of desulfurization and denitrification integral system for cleaning fume and distribution are with embodiment 1.
Use desulfurization and denitrification integral system for cleaning fume of the present invention and carry out the flue gas desulfurization and denitrification purified treatment,, remove following steps with embodiment 1:
In the step (2), gained absorption liquid pH value is 3.2 o'clock, opens drain valve, and absorption liquid is flowed in the mixing pit 20 through absorption liquid discharge tube 14; Make the pH of mixed value in the mixing pit keep 5.3 through the acidity adjustment device; Mixed liquor reaches the pH value through oxidation in oxidation pond 15 be after 7.4, and the mixed liquor after oxidation utilizes the potential difference of 19 of oxidation pond 15 and vent channels to advance in the vent channels 19 by flow by gravity.
Use the present invention and carry out the flue gas desulfurization and denitrification purified treatment, desulfuration efficiency reaches 99%, and denitration efficiency reaches 95%.
Embodiment 5
As shown in Figure 1, a kind of setting of desulfurization and denitrification integral system for cleaning fume and distribution are with embodiment 1.
Use desulfurization and denitrification integral system for cleaning fume of the present invention and carry out the flue gas desulfurization and denitrification purified treatment,, remove following steps with embodiment 1:
In the step (2), gained absorption liquid pH value is 2.7 o'clock, opens drain valve, and absorption liquid is flowed in the mixing pit 20 through absorption liquid discharge tube 14; Make the pH of mixed value in the mixing pit keep 5.1 through the acidity adjustment device; Mixed liquor reaches the pH value through oxidation in oxidation pond 15 be after 7.2, and the mixed liquor after oxidation utilizes the potential difference of 19 of oxidation pond 15 and vent channels to advance in the vent channels 19 by flow by gravity.
Use the present invention and carry out the flue gas desulfurization and denitrification purified treatment, desulfuration efficiency reaches 97%, and denitration efficiency reaches 93%.
Embodiment 6
As shown in Figure 1, a kind of setting of desulfurization and denitrification integral system for cleaning fume and distribution are with embodiment 1.
Use desulfurization and denitrification integral system for cleaning fume of the present invention and carry out the flue gas desulfurization and denitrification purified treatment,, remove following steps with embodiment 1:
In the step (2), gained absorption liquid pH value is 2.9 o'clock, opens drain valve, and absorption liquid is flowed in the mixing pit 20 through absorption liquid discharge tube 14; Make the pH of mixed value in the mixing pit keep 5.0 through the acidity adjustment device; Mixed liquor reaches the pH value through oxidation in oxidation pond 15 be after 7.7, and the mixed liquor after oxidation utilizes the potential difference of 19 of oxidation pond 15 and vent channels to advance in the vent channels 19 by flow by gravity.
Use the present invention and carry out the flue gas desulfurization and denitrification purified treatment, desulfuration efficiency reaches 99%, and denitration efficiency reaches 96%.
The invention is not restricted to above-mentioned embodiment, those skilled in the art made to any conspicuous improvement of above-mentioned embodiment or change, can not exceed the protection domain of design of the present invention and accompanying claims.
Claims (10)
1. desulfurization and denitrification integral system for cleaning fume; Comprise interconnective former flue gas input system, absorption system and clean flue gas emission, it is characterized in that: also comprise the former flue gas oxidative system that is connected with said former flue gas input system, the desulfurization denitrification agent comprehensive function system that is connected with said absorption system.
2. desulfurization and denitrification integral system for cleaning fume according to claim 1 is characterized in that:
Said desulfurization denitrification agent comprehensive function system comprises interconnective desulphurization denitration agent feeding device, absorption liquid retracting device, recovery device, and wherein, said desulphurization denitration agent feeding device is connected with said absorption system respectively with the absorption liquid retracting device.
3. desulfurization and denitrification integral system for cleaning fume according to claim 2 is characterized in that:
Said desulphurization denitration agent feeding device comprises interconnective desulfurization denitrification agent storage device, desulfurization denitrification agent delivery pump and desulfurization denitrification agent conveyance conduit;
Said absorption liquid retracting device comprises interconnective absorption liquid discharge tube and absorption liquid recovery pond;
Said recovery device comprises interconnective oxidation pre-treatment device and tapping equipment; Said oxidation pre-treatment device comprises that the outer air that is provided with of aeration tube, oxidation pond that is provided with in oxidation pond, the oxidation pond is imported blower fan and the air input channel is used in oxidation; Wherein, Said air input blower fan communicates with the external world, and said oxidation is connected with said aeration tube with the air input channel; Said tapping equipment comprises vent channels, and said vent channels is connected with said oxidation pond;
Said absorption liquid recovery pond is connected with said oxidation pond;
Said absorption system comprises the absorption tower;
Said absorption tower is connected with said absorption liquid discharge tube, desulfurization denitrification agent conveyance conduit respectively.
4. desulfurization and denitrification integral system for cleaning fume according to claim 3 is characterized in that:
Said former flue gas input system comprises interconnective former flue gas input booster fan and former flue gas input channel;
Said former flue gas oxidative system is the ozone oxidation system, comprises interconnective ozone with air input channel, air compressor and ozone generator, and said ozone generator is connected with said former flue gas input channel;
Be disposed with liquid storage tank, spray equipment and demister in the absorption tower of said absorption system from the bottom to top; Said spray equipment comprises a plurality of spraying layers, and said demister comprises an above demister and is arranged on the demister flushing water layer of demister top;
Bottom, said absorption tower inlet is connected with said former flue gas input channel;
The outlet of top, said absorption tower is connected with said clean flue gas emission;
Said spraying layer is connected with said desulfurization denitrification agent conveyance conduit;
Said liquid storage tank is connected with said absorption liquid discharge tube.
5. desulfurization and denitrification integral system for cleaning fume according to claim 4 is characterized in that:
Said absorption liquid recovery pond and said desulfurization denitrification agent storage device are same device mixing pit;
The below of said liquid storage tank is connected with the top of said mixing pit, and the middle top of said mixing pit is connected with the top of said oxidation pond, and the top of said oxidation pond is connected with said vent channels.
6. desulfurization and denitrification integral system for cleaning fume according to claim 5; It is characterized in that: said desulfurization and denitrification integral system for cleaning fume also comprises the acidity adjustment device; Said acidity adjustment device comprises interconnective regulator solution delivery pump and regulator solution conveyance conduit; Wherein, be provided with the regulator solution filter in said regulator solution delivery pump porch, said regulator solution conveyance conduit is connected with said mixing pit;
Be provided with the desulfurization denitrification agent filter in the porch of said desulfurization denitrification agent delivery pump;
In the former flue gas input channel of porch, bottom, said absorption tower, be provided with the ozone distributor.
7. a desulfurization and denitrification integral gas cleaning treatment process is characterized in that, comprises the steps:
(1) flue gas input
The former flue gas of former flue gas input system input gets into absorption system after the oxidation of former flue gas oxidative system;
(2) smoke absorption purifies
The flue gas that gets into absorption system is after the desulfurization denitrification agent that desulfurization denitrification agent comprehensive function system carries purifies the absorption processing, and the clean flue gas of gained gets into clean flue gas emission, and the gained absorption liquid gets into desulfurization denitrification agent comprehensive function system and handles and recycle;
(3) clean fume emission
The clean flue gas that gets into clean flue gas emission in the said step (2) discharges.
8. desulfurization and denitrification integral gas cleaning treatment process according to claim 7 is characterized in that:
In said step (1):
In said former flue gas input system, former flue gas is carried through booster fan pressurization back, and inlet gets into the absorption tower from the bottom, absorption tower after the ozone oxidation that former flue gas oxidative system is carried in former flue gas input channel;
Wherein, said ozone is made through ozone generator after ozone gets into the air compressor processed compressed with the air input channel by air again, and gained ozone is carried through the ozone distributor that is arranged in the former flue gas input channel;
In said step (2):
After flue gas after the oxidation gets into the absorption tower of absorption system; The desulfurization denitrification agent that sprays with spraying layer from bottom to top counter current contacting mutually purifies absorption; Up again through after the demister demist; Continue the up demister flushing water layer that passes and get into clean flue gas emission, the absorption liquid entering desulfurization denitrification agent comprehensive function system that gets in the liquid storage tank of bottom, absorption tower handles and recycle;
Wherein, said desulfurization denitrification agent is provided by the desulphurization denitration agent feeding device, and said desulfurization denitrification agent delivers into the absorption tower by the desulfurization denitrification agent delivery pump through the desulfurization denitrification agent conveyance conduit after filtering from desulfurization denitrfying agent storage device;
The gained absorption liquid flows in the absorption liquid recovery pond through the absorption liquid discharge tube.
9. desulfurization and denitrification integral gas cleaning treatment process according to claim 8 is characterized in that:
In said step (2):
Said absorption liquid recovery pond and said desulfurization denitrification agent storage device are same device mixing pit;
The regulator solution that mixed liquor in the said mixing pit is carried through the acidity adjustment device is regulated the acidity continued as the desulfurization denitrification agent recycle;
Mixed liquor in the said mixing pit carries out discharging after the oxidation pre-treatment through recovery device;
Wherein, in said acidity adjustment device, regulator solution is input in the mixing pit by the regulator solution delivery pump after the regulator solution filter filters;
In said recovery device; Mixed liquor carries out oxidation by the oxidation pre-treatment device; Discharge by tapping equipment; The mixed liquor oxidation is carried out in the oxidation pond of oxidation pre-treatment device, the abundant catalytic oxidation of air that aeration tube is carried in mixed liquor and the oxidation pond, and said air is imported with the air input channel through oxidation by the outer air input blower fan that is provided with of oxidation pond.
10. desulfurization and denitrification integral gas cleaning treatment process according to claim 9 is characterized in that:
Said desulfurization denitrification agent is a seawater;
Said regulator solution is a seawater;
The pH value of absorption liquid is 3.5 when following, in absorption liquid discharge tube inflow absorption liquid recovery pond in the said liquid storage tank;
PH of mixed value in the said mixing pit is 5.0 ~ 5.4;
Said mixed liquor in oxidation pond through oxidation pre-treatment reach the pH value greater than 7 after the discharging.
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