CN109589765A - Ultralow-temperature denitration device combined with lime-gypsum desulfurization process - Google Patents
Ultralow-temperature denitration device combined with lime-gypsum desulfurization process Download PDFInfo
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- CN109589765A CN109589765A CN201811527363.5A CN201811527363A CN109589765A CN 109589765 A CN109589765 A CN 109589765A CN 201811527363 A CN201811527363 A CN 201811527363A CN 109589765 A CN109589765 A CN 109589765A
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- tower
- denitration
- lime
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- pipeline
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- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 73
- 230000023556 desulfurization Effects 0.000 title claims abstract description 63
- 238000000034 method Methods 0.000 title claims abstract description 31
- 239000010440 gypsum Substances 0.000 title claims abstract description 25
- 229910052602 gypsum Inorganic materials 0.000 title claims abstract description 25
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 41
- 230000003647 oxidation Effects 0.000 claims abstract description 30
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 30
- 230000009467 reduction Effects 0.000 claims abstract description 30
- 238000005516 engineering process Methods 0.000 claims abstract description 21
- 239000007788 liquid Substances 0.000 claims abstract description 21
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000011575 calcium Substances 0.000 claims abstract description 12
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 12
- 238000003860 storage Methods 0.000 claims abstract description 11
- 230000003009 desulfurizing effect Effects 0.000 claims description 47
- 239000007921 spray Substances 0.000 claims description 44
- 238000002360 preparation method Methods 0.000 claims description 36
- 239000000920 calcium hydroxide Substances 0.000 claims description 24
- 235000011116 calcium hydroxide Nutrition 0.000 claims description 24
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 18
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 17
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 17
- 239000004571 lime Substances 0.000 claims description 17
- 229910052717 sulfur Inorganic materials 0.000 claims description 16
- 239000011593 sulfur Substances 0.000 claims description 16
- 235000019504 cigarettes Nutrition 0.000 claims description 2
- 238000007599 discharging Methods 0.000 claims 1
- 239000000779 smoke Substances 0.000 abstract description 6
- 230000001360 synchronised effect Effects 0.000 abstract 1
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 30
- 239000003546 flue gas Substances 0.000 description 27
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 26
- 239000000047 product Substances 0.000 description 24
- 238000006722 reduction reaction Methods 0.000 description 24
- 238000006243 chemical reaction Methods 0.000 description 18
- 239000007789 gas Substances 0.000 description 16
- 230000000694 effects Effects 0.000 description 11
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 10
- 238000000926 separation method Methods 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- GBAOBIBJACZTNA-UHFFFAOYSA-L calcium sulfite Chemical compound [Ca+2].[O-]S([O-])=O GBAOBIBJACZTNA-UHFFFAOYSA-L 0.000 description 6
- 235000010261 calcium sulphite Nutrition 0.000 description 6
- 239000003638 chemical reducing agent Substances 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 229910002089 NOx Inorganic materials 0.000 description 3
- 239000005864 Sulphur Substances 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- POIUWJQBRNEFGX-XAMSXPGMSA-N cathelicidin Chemical compound C([C@@H](C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CO)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CCC(O)=O)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H]([C@@H](C)CC)C(=O)NCC(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CCC(O)=O)C(=O)N[C@@H](CC=1C=CC=CC=1)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H]([C@@H](C)CC)C(=O)N[C@@H](C(C)C)C(=O)N[C@@H](CCC(N)=O)C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H]([C@@H](C)CC)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CC(O)=O)C(=O)N[C@@H](CC=1C=CC=CC=1)C(=O)N[C@@H](CC(C)C)C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H](CC(N)=O)C(=O)N[C@@H](CC(C)C)C(=O)N[C@@H](C(C)C)C(=O)N1[C@@H](CCC1)C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H]([C@@H](C)O)C(=O)N[C@@H](CCC(O)=O)C(=O)N[C@@H](CO)C(O)=O)NC(=O)[C@H](CC=1C=CC=CC=1)NC(=O)[C@H](CC(O)=O)NC(=O)CNC(=O)[C@H](CC(C)C)NC(=O)[C@@H](N)CC(C)C)C1=CC=CC=C1 POIUWJQBRNEFGX-XAMSXPGMSA-N 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 238000000746 purification Methods 0.000 description 3
- 235000010269 sulphur dioxide Nutrition 0.000 description 3
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 2
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 2
- 239000000376 reactant Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000004291 sulphur dioxide Substances 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 1
- IOVCWXUNBOPUCH-UHFFFAOYSA-N Nitrous acid Chemical compound ON=O IOVCWXUNBOPUCH-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 239000006071 cream Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 235000019391 nitrogen oxide Nutrition 0.000 description 1
- JTJMJGYZQZDUJJ-UHFFFAOYSA-N phencyclidine Chemical class C1CCCCN1C1(C=2C=CC=CC=2)CCCCC1 JTJMJGYZQZDUJJ-UHFFFAOYSA-N 0.000 description 1
- RAFRTSDUWORDLA-UHFFFAOYSA-N phenyl 3-chloropropanoate Chemical compound ClCCC(=O)OC1=CC=CC=C1 RAFRTSDUWORDLA-UHFFFAOYSA-N 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/75—Multi-step processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
- B01D53/502—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific solution or suspension
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/54—Nitrogen compounds
- B01D53/56—Nitrogen oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/79—Injecting reactants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/96—Regeneration, reactivation or recycling of reactants
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/46—Sulfates
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/46—Sulfates
- C01F11/464—Sulfates of Ca from gases containing sulfur oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/40—Alkaline earth metal or magnesium compounds
- B01D2251/404—Alkaline earth metal or magnesium compounds of calcium
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Sustainable Development (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses an ultralow temperature denitration device combined with lime-gypsum desulfurization process, which comprises a desulfurization tower, a denitration agent storage tank and an oxidation fan, wherein one side of the desulfurization tower is connected with a smoke inlet pipe, a circulating groove is arranged in the bottom of the desulfurization tower, the denitration tower is connected with a denitration circulating pump, a pipeline is connected to the top of the desulfurization tower, the denitration agent storage tank is connected with a denitration agent pump, the oxidation fan is connected with an oxidation air pipe connected to the bottom of the circulating groove, calcium-based desulfurizer liquid is arranged in the circulating groove, two sides of the circulating groove are respectively connected with a reduction circulating pump and a desulfurization circulating pump connected with a desulfurization sprayer positioned in the desulfurization tower through pipelines, a demister, a chimney, a denitration sprayer and a reduction sprayer, the chimney is connected to the denitration circulating pump, and the reduction sprayer is; the invention combines the lime-gypsum desulfurization process and the bottom temperature denitration technology, has simple structure, reasonably utilizes the desulfurization product for denitration, reduces the cost and simultaneously improves the synchronous desulfurization rate and the denitration rate.
Description
Technical field
The present invention relates to flue gases purification fields, more specifically, it relates to a kind of combination lime-gypsum method desulfurization work
The ultralow temperature denitrification apparatus of skill.
Background technique
Industrial melting furnaces denitrating flue gas is the environmental protection policy that country just proposed and promoted in recent years, it is intended to protect environment, inhibit
Industry excess capacity promotes industry technology transition；But it is suitble to the matching technology of industry melting furnaces denitrating flue gas, is at home and abroad in
The development exploration stage；Industry melting furnaces denitration method for flue gas generallys use SNCR and SCR method denitration at present；SNCR method denitration is not
Under conditions of catalyst, the reducing agents such as ammonia, urea are sprayed into Boiler Furnace and carry out selective reaction with NOx, but must be
Reducing agent is added in high-temperature region, which is influenced very greatly by boiler structure size, and denitrification rate is low；SCR method denitration refers in catalyst
And under the conditions of 320~450 DEG C of reaction temperature, the reaction of nitrogen oxides in reducing agent (liquefied ammonia) and flue gas generate harmless nitrogen and
Water, to remove the NOx in flue gas, SCR method denitration efficiency is up to 70-90%；However steel-making sintering machine, nonferrous smelting fuming
Furnace, bottom convertor survey the flue-gas temperature of blown converter and coke oven all at 200 DEG C hereinafter, the temperature such as after wet desulphurization is even more to be lower than
After 60 DEG C, according to SNCR and SCR method denitration, it is also necessary to carry out heat temperature raising to flue gas, considerably increase operating cost.
Limestone/lime-gypsum method flue gas desulfurization technique is generated by using after calcium-based desulfurizing agent sulfur dioxide absorption
Two kinds of desulfurization products of calcium sulfite and calcium sulfate, however since both desulfurization product utilization rates are not high, and its solubility compared with
It is small, fouling is easily formed in desulfuration absorbing tower, causes to block, and is easily caused the waste of desulfurization product and is influenced desulphurization system just
Often operation.
Summary of the invention
In view of the deficiencies of the prior art, the present invention intends to provide a kind of combination lime-gypsum method desulfurization work
The ultralow temperature denitrification apparatus of skill has the advantages that operating cost is low and synchronizes the high desulfurization of progress and denitration.
To achieve the above object, the present invention provides the following technical scheme that
A kind of ultralow temperature denitrification apparatus of combination lime-gypsum method sulfur removal technology, including desulfurizing tower, denitrating tower, denitrfying agent
Storage tank and oxidation fan, the tower top of the desulfurizing tower are connect with the denitrating tower tower bottom by pipeline, the desulfurizing tower tower bottom
Side is connected with smoke-intake pipe, and the interior circulating slot for being placed with calcium-based desulfurizing agent liquid is offered in the tower bottom of the desulfurizing tower, described
Oxidation fan is connected with oxidation air, the slot bottom company of the one end of the oxidation air far from the oxidation fan and the circulating slot
It connects, one side ducts of circulating slot are connected with desulfuration recycle pump, and the desulfuration recycle pump is connected far from the side of the circulating slot
There are several layers to be located at the desulfurization spray thrower in the desulfurizing tower, another side ducts of circulating slot are connected with reduction circulating pump, institute
It states the direction in denitrating tower from tower bottom to tower top and is connected with denitration spray thrower, reduction spray thrower, demister and chimney in turn, it is described
Reduction circulating pump is connect with the reduction spray thrower, and denitrating tower tower bottom side is connected with denitration circulating pump, and the denitration follows
Ring pump connect with the denitration spray thrower, the denitrfying agent storage tank be connected with denitrfying agent pump, the tower bottom side of the denitrating tower and
The denitrfying agent pump connection, the chimney are connect with the denitration column overhead.
So set, containing SO2And NOXIndustrial smoke enter desulfurization by being connected to the smoke-intake pipe of desulfurizing tower tower bottom side
Tower；The calcium-based desulfurizing agent liquid in the circulating slot for being opened in desulfurizing tower tower bottom is pipelined to desulfurization by desulfuration recycle pump
Spray thrower with contain SO2And NOXIndustrial smoke contact carry out desulphurization reaction；Desulfurization spray thrower is provided with several layers, convenient for making desulfurization
SO in the doctor solution and flue gas that jet flow device sprays2It obtains more sufficiently reacting, realizes the effect for improving desulfurization degree；Desulphurization reaction generates
Calcium sulfite afterwards enters in circulating slot, and calcium sulfite is generated by being connected in the oxygen reaction that the oxidation air of oxidation fan is sent out
Calcium sulfate, the calcium sulfate liquid in circulating slot are delivered in reduction spray thrower by restoring circulating pump；Then, after the completion of desulfurization
After flue gas enters the tower bottom of denitrating tower by pipeline from desulfurization column overhead, by denitrfying agent pump from denitrfying agent storage tank convey Lai denitration
Agent is delivered to denitration spray thrower and smoke contacts progress denitration reaction to denitrating tower tower bottom, then through denitration circulating pump；Complete denitration
The flue gas of reaction sequentially enters the reduction spray thrower of denitrating tower upper end and demister contact is reacted, first defeated by reduction circulating pump
Send to reduction spray thrower liquid in calcium sulfate in flue gas nitrogen and sulphur dioxide reduction react and generate nitrous acid respectively
Calcium and H2After O and calcium sulfate, by direct exhaust chimney qualified discharge after demister further purifies, to reach further
The effect of desulfurization and denitration, and then realize the effect for improving denitrification rate and desulfurization degree；By lime-gypsum method sulfur removal technology and bottom temperature
Denitration technology combines, can be lower than 90 DEG C the case where lower completion oxynitrides removing, do not limited by flue-gas temperature,
Improve the stability of system；And overall structure is simple, rationally using desulfurization product as denitrification reducing agent, avoids calcium sulfate
The operation of scale effect desulphurization system, improves desulfurization degree and denitrification rate while reducing costs；In addition, entire production process
Circulation in middle gas-liquid closing, will not generate the new three wastes, without secondary pollution.
Further setting: the smoke-intake pipe is connected with vortex gas distributor close to one end of the circulating slot.
So set, the vortex gas distributor connected by smoke-intake pipe close to one end of circulating slot, utilizes vortex gas
Distributor changes the walking manner of flue gas, improves the way of contact of flue gas and doctor solution, realizes the benefit for further increasing desulfurizing agent
With rate and denitration efficiency.
Further setting: a liter gas cap, described liter of gas are provided between the denitration spray thrower and the reduction spray thrower
Cap is connected in the denitrating tower.
So set, by the liter gas cap being arranged between denitration spray thrower and reduction spray thrower, realization is sprayed to denitration
Flue gas after drenching the spray liquid reaction of device carries out gas-liquid separation.
Further setting: further including lime silo, preparation vessel, pond and milk of lime pump, the output end connection of the lime silo
There is outlet valve, the outlet valve is connect with the notch pipeline of the preparation vessel, the notch pipeline in the pond and the preparation vessel
Connection, the slot bottom of the preparation vessel are connect with the milk of lime pump pipeline, and the milk of lime pump is connect with the circulating slot pipeline.
So set, the outlet valve for being connected to lime silo output end is opened, the lime in lime silo is entered by pipeline
In preparation vessel, the lime into preparation vessel is mixed and made into lime by the water that the pond that pipeline is connected to preparation vessel notch is injected
Cream, milk of lime are entered in circulating slot by the milk of lime pump that pipeline is connected to preparation vessel slot bottom；Realize the preparation of calcium-based desulfurizing agent,
Reduce desulfurizing agent purchase cost.
Further setting: agitating device is provided in the preparation vessel.
So set, playing the role of coming into full contact with lime with water, just by the agitating device being set in preparation vessel
In the preparation efficiency for improving milk of lime.
Further setting: filter is connected between the preparation vessel and the milk of lime pump.
So set, playing prevents milk of lime pump from blocking by the filter being connected between preparation vessel and milk of lime pump
Effect, while improving the preparation purity of desulfurizing agent.
Further setting: further including collecting pit, the tower bottom of the denitrating tower is connect with the collecting pit pipeline, the circulation
The slot bottom of slot is connect with the collecting pit pipeline.
So set, the denitration product that denitration reduction reaction generates is entered in collecting pit from denitrating tower tower bottom by pipeline,
Reactant after desulphurization reaction generates is entered in collecting pit by pipeline, and desulfurization product and denitration reduzate are collected in realization
Effect avoids the calcium sulfate in desulfurization product and denitration reduzate from blocking the operation for influencing desulfurizing tower and denitrating tower.
Further setting: the collecting pit pipeline is connected with filter charging pump, and the filter charging pump is far from described
Collecting pit one end pipeline is connected with cyclone, and the output end of the cyclone is connected with filter, the filter with it is described
Conveying pipeline is connected between desulfurizing tower, the filter is connected with moisture trap close to one end of the conveying pipeline, described
Circulation pipe is connected between the input terminal of cyclone and the conveying pipeline.
So set, desulfurization product and denitration product enter after collecting pit through filter charging pump pipeline to being connected to
In cyclone of the filter charging pump far from collecting pit one end, denitration product and desulfurization product are by the preliminary eddy flow of cyclone progress
Separation, the solid being then demultiplex out are sequentially sent to be connected to the filter of cyclone output end and the air water being connected on filter
Separator carries out secondary separation and three times separating and dehydrating respectively, isolates gypsum by-product；Liquid then passes through filter and air water
Cyclone swirl flow point is again introduced by the circulation pipe being connected between the input terminal of cyclone and conveying pipeline after separator
From the liquid separated, which returns to, continues to participate in desulphurization reaction in desulfurizing tower, further increase into the desulfurizing agent in circulating slot
Quality；And then realize the utilization rate for improving desulfurization and denitration product, cost is reduced, desulfurization is rationally recycled and denitration product mentions
The function of high desulfurization rate.
Further setting: the oxidation fan is roots blower.
So set, oxidation fan uses roots blower, play the role of energy-saving consumption-reducing.
Further setting: two layers of primary demister is provided in the desulfurizing tower.
So set, by be set in desulfurizing tower two layers primary demister, realize that the flue gas to desulfurization in it carries out
Preliminary purification.
In conclusion the present invention combines lime-gypsum method sulfur removal technology and bottom temperature denitration technology, 90 can be lower than
DEG C the case where lower completion oxynitrides removing, do not limited by flue-gas temperature, improve the stability and denitrification rate of system；
It is restored by the way that calcium sulfite oxidation is generated calcium sulfate as denitration with lime-gypsum method desulfurization at calcium sulfate using oxidation fan
Agent improves desulfurization product utilization rate, and calcium sulfate scaling is avoided to influence the operation of desulphurization system, reduces operating cost, improves simultaneously
Desulfurization degree and denitrification rate；In addition, recycling in gas-liquid closing in entire production process, the new three wastes will not be generated, without secondary dirt
Dye.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the embodiment of the present invention.
In figure: 1, desulfurizing tower；2, denitrating tower；3, denitrfying agent storage tank；4, oxidation fan；5, smoke-intake pipe；6, circulating slot；7, oxygen
Change air hose；8, desulfuration recycle pump；9, desulfurization spray thrower；10, circulating pump is restored；11, denitration spray thrower；12, spray thrower is restored；
13, demister；14, chimney；15, denitration circulating pump；16, denitrfying agent pumps；17, vortex gas distributor；18, gas cap is risen；19, stone
Ash cellar；20, preparation vessel；21, pond；22, milk of lime pump；23, outlet valve；24, agitating device；25, filter；26, collecting pit；
27, filter charging pump；28, cyclone；29, filter；30, conveying pipeline；31, moisture trap；32, circulation pipe；33, primary
Demister.
Specific embodiment
With reference to the accompanying drawings and examples, specific embodiments of the present invention will be described in further detail.Implement below
Example is not intended to limit the scope of the invention for illustrating the present invention.
The ultralow temperature denitrification apparatus of a kind of combination lime-gypsum method sulfur removal technology of the invention, as shown in Figure 1, including de-
The tower top of sulphur tower 1, denitrating tower 2, denitrfying agent storage tank 3 and oxidation fan 4, desulfurizing tower 1 is connect with 2 tower bottom of denitrating tower by pipeline,
Denitrfying agent storage tank 3 is connected with denitrfying agent pump 16, the tower bottom side of denitrating tower 2 is connect with denitrfying agent pump 16.
As shown in Figure 1, the side of 1 tower bottom of desulfurizing tower is connected with smoke-intake pipe 5, smoke-intake pipe 5 is connected close to one end of circulating slot 6
There is vortex gas distributor 17；Two layers of primary demister 33 is provided in desulfurizing tower 1；It is put in being offered in the tower bottom of desulfurizing tower 1
It is equipped with the circulating slot 6 of calcium-based desulfurizing agent liquid, 6 one side ducts of circulating slot are connected with desulfuration recycle pump 8, another side pipe of circulating slot 6
Road is connected with reduction circulating pump 10；Desulfuration recycle pump 8 is connected with several layers far from the side of circulating slot 6 and is located in desulfurizing tower 1
Desulfurization spray thrower 9；Oxidation fan 4 is connected with oxidation air 7, the one end of oxidation air 7 far from oxidation fan 4 and circulating slot 6
Slot bottom connection；Oxidation fan 4 is roots blower.
As shown in Figure 1, the direction in denitrating tower 2 from tower bottom to tower top is connected with denitration spray thrower 11, reduction spray in turn
Device 12, demister 13 and chimney 14, reduction circulating pump 10 are connect with reduction spray thrower 12, and 2 tower bottom side of denitrating tower is connected with de-
Nitre circulating pump 15, denitration circulating pump 15 are connect with denitration spray thrower 11；It is set between denitration spray thrower 11 and reduction spray thrower 12
It is equipped with liter gas cap 18, gas cap 18 is risen and is connected in denitrating tower 2, chimney 14 is connect with the tower bottom of denitrating tower 2.
As shown in Figure 1, further including lime silo 19, preparation vessel 20, pond 21 and milk of lime pump 22；The output end of lime silo 19
It is connected with outlet valve 23, outlet valve 23 is connect with the notch pipeline of preparation vessel 20；The notch pipeline of pond 21 and preparation vessel 20 connects
It connects；Agitating device 24 is provided in preparation vessel 20；The slot bottom of preparation vessel 20 is connect with 22 pipeline of milk of lime pump；Preparation vessel 20 with
Filter 25 is connected between milk of lime pump 22；Milk of lime pump 22 is connect with 6 pipeline of circulating slot.
As shown in Figure 1, further including collecting pit 26, the tower bottom of denitrating tower 2 is connect with 26 pipeline of collecting pit, the slot of circulating slot 6
Bottom is connect with 26 pipeline of collecting pit；26 pipeline of collecting pit is connected with filter charging pump 27；Filter charging pump 27 is far from collection
26 one end pipeline of pond is connected with cyclone 28；The output end of cyclone 28 is connected with filter 29, in filter 29 and desulfurizing tower 1
Between be connected with conveying pipeline 30；Filter 29 is connected with moisture trap 31 close to one end of conveying pipeline 30；In cyclone 28
Circulation pipe 32 is connected between input terminal and conveying pipeline 30.
Working principle: contain SO2And NOXIndustrial smoke by be connected to the smoke-intake pipe 5 of 1 tower bottom side of desulfurizing tower enter it is de-
Sulphur tower 1；The calcium-based desulfurizing agent liquid in the circulating slot 6 for being opened in 1 tower bottom of desulfurizing tower is passed through into pipeline by desulfuration recycle pump 8
To desulfurization spray thrower 9 and contain SO2And NOXIndustrial smoke contact carry out desulphurization reaction；Desulfurization spray thrower 9 is provided with several layers, just
The SO in the doctor solution and flue gas for spraying desulfurization jet flow device2It obtains more sufficiently reacting, realizes the effect for improving desulfurization degree；Desulfurization
Calcium sulfite after reaction generates enters in circulating slot 6, what calcium sulfite was sent out by being connected in the oxidation air 7 of oxidation fan 4
Oxygen reaction generates calcium sulfate, and the calcium sulfate liquid in circulating slot 6 is delivered in reduction spray thrower 12 by restoring circulating pump 10；
Then, after the flue gas after the completion of desulfurization enters the tower bottom of denitrating tower 2 by pipeline from 1 tower top of desulfurizing tower, by denitrfying agent pump 16 from
The denitrfying agent that the conveying of denitrfying agent storage tank 3 comes is delivered to denitration spray thrower 11 and cigarette to 2 tower bottom of denitrating tower, then through denitration circulating pump 15
Gas contact carries out denitration reaction；The flue gas of denitration reaction is completed by being arranged between denitration spray thrower 11 and reduction spray thrower 12
Liter gas cap 18, realize to after react with the spray liquid of denitration spray thrower 11 flue gas progress gas-liquid separation；It sequentially enters again de-
Reduction spray thrower 12 and demister 13 contact of 2 upper end of nitre tower are reacted, and are first delivered to reduction spray by reduction circulating pump 10
Calcium sulfate in the liquid of device 12 in flue gas nitrogen and sulphur dioxide reduction react and generate calcium nitrite and H respectively2O and sulphur
After sour calcium, by 14 qualified discharge of direct exhaust chimney after demister 13 further purification, thus reach further desulfurization and
The effect of denitration, and then realize the effect for improving denitrification rate and desulfurization degree；By lime-gypsum method sulfur removal technology and bottom temperature denitration skill
Art combines, can be lower than 90 DEG C the case where lower completion oxynitrides removing, do not limited, improved by flue-gas temperature
The stability of system；And overall structure is simple, rationally using desulfurization product as denitrification reducing agent, avoids calcium sulfate scaling shadow
The operation for ringing desulphurization system, improves desulfurization degree and denitrification rate while reducing costs；In addition, gas-liquid in entire production process
Circulation, will not generate the new three wastes in closing, without secondary pollution；In addition, oxidation fan 4 uses roots blower, plays energy conservation and subtract
The effect of consumption.
When needing to prepare calcium-based desulfurizing agent, the outlet valve 23 for being connected to 19 output end of lime silo is opened, lime silo 19
Interior lime is entered in preparation vessel 20 by pipeline, and the lime into preparation vessel 20 is connected to 20 notch of preparation vessel by pipeline
The water that pond 21 is injected is mixed and made into milk of lime, by the agitating device 24 being set in preparation vessel 20, keeps lime abundant with water
Contact, convenient for improving the preparation efficiency of milk of lime；Milk of lime by pipeline be connected to the milk of lime pump 22 of 20 slot bottom of preparation vessel into
Enter in circulating slot 6；And then realize the preparation of calcium-based desulfurizing agent, reduce desulfurizing agent purchase cost；In addition, by being connected to preparation vessel
Filter 25 between 20 and milk of lime pump 22 plays the role of preventing milk of lime pump 22 from blocking, while improving the system of desulfurizing agent
Standby purity.
In addition, the vortex gas distributor 17 connected by smoke-intake pipe 5 close to one end of circulating slot 6, utilizes vortex gas
Distributor 17 changes the walking manner of flue gas, improves the way of contact of flue gas and doctor solution, and realization further increases desulfurizing agent
Utilization rate and denitration efficiency；The denitration product that denitration reduction reaction generates enters collecting pit 26 by pipeline from 2 tower bottom of denitrating tower
Interior, the reactant after desulphurization reaction generates is entered in collecting pit 26 by pipeline, is realized desulfurization product and denitration reduzate
The effect of collection avoids the calcium sulfate in desulfurization product and denitration reduzate from blocking the fortune for influencing desulfurizing tower 1 and denitrating tower 2
Row；Into after collecting pit 26 desulfurization product and denitration product by 27 pipeline of filter charging pump to be connected to filter confession
In material 27 cyclones 28 far from 26 one end of collecting pit of pump, denitration product and desulfurization product pass through cyclone 28 and carry out preliminary eddy flow
Separation, the solid being then demultiplex out are sequentially sent to be connected to the filter 29 of 28 output end of cyclone and be connected on filter 29
Moisture trap 31 carry out secondary separation and separating and dehydrating three times, isolate gypsum by-product；The liquid that cyclone 28 is isolated
Body is then by being connected to following between the input terminal of cyclone 28 and conveying pipeline 30 after filter 29 and moisture trap 31
Endless tube 32 is again introduced into cyclone 28 and carries out swirl flow separation, finally returns to desulfurizing tower from the liquid that filter 29 is separated
Desulphurization reaction is continued to participate in 1, is further increased into the desulfurizing agent quality in circulating slot 6；And then it realizes and improves desulfurization and take off
The utilization rate of nitre product, reduces cost, rationally recycles desulfurization and denitration product improves the function of desulfurization degree；The present invention also adopts
It is precisely controlled with DSC control system, it is ensured that reduce operating cost in the case that tail gas NOx emission is up to standard.
The above is only a preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-mentioned implementation
Example, all technical solutions belonged under thinking of the present invention all belong to the scope of protection of the present invention.It should be pointed out that for the art
Those of ordinary skill for, several improvements and modifications without departing from the principles of the present invention, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of ultralow temperature denitrification apparatus of combination lime-gypsum method sulfur removal technology, it is characterised in that: including desulfurizing tower, denitration
Tower, denitrfying agent storage tank and oxidation fan, the tower top of the desulfurizing tower are connect with the denitrating tower tower bottom by pipeline, the desulfurization
The side of tower tower bottom is connected with smoke-intake pipe, and the interior circulation for being placed with calcium-based desulfurizing agent liquid is offered in the tower bottom of the desulfurizing tower
Slot, the oxidation fan are connected with oxidation air, the one end of the oxidation air far from the oxidation fan and the circulating slot
Slot bottom connection, one side ducts of circulating slot are connected with desulfuration recycle pump, and the desulfuration recycle pump is far from the circulating slot
Side is connected with the desulfurization spray thrower that several layers are located in the desulfurizing tower, and another side ducts of circulating slot are connected with reduction and follow
Ring pump, the interior direction from tower bottom to tower top of the denitrating tower are connected with denitration spray thrower, reduction spray thrower, demister and cigarette in turn
Chimney, the reduction circulating pump are connect with the reduction spray thrower, and denitrating tower tower bottom side is connected with denitration circulating pump, described
Denitration circulating pump is connect with the denitration spray thrower, and the denitrfying agent storage tank is connected with denitrfying agent pump, the tower bottom of the denitrating tower
Side and denitrfying agent pump connect, and the chimney is connect with the denitration column overhead.
2. a kind of ultralow temperature denitrification apparatus of combination lime-gypsum method sulfur removal technology according to claim 1, feature exist
In: the smoke-intake pipe is connected with vortex gas distributor close to one end of the circulating slot.
3. a kind of ultralow temperature denitrification apparatus of combination lime-gypsum method sulfur removal technology according to claim 1, feature exist
In: a liter gas cap is provided between the denitration spray thrower and the reduction spray thrower, described liter of gas cap is connected to the denitration
In tower.
4. a kind of ultralow temperature denitrification apparatus of combination lime-gypsum method sulfur removal technology according to claim 1, feature exist
In: it further include lime silo, preparation vessel, pond and milk of lime pump, the output end of the lime silo is connected with outlet valve, the discharging
Valve is connect with the notch pipeline of the preparation vessel, and the pond is connect with the notch pipeline of the preparation vessel, the preparation vessel
Slot bottom is connect with the milk of lime pump pipeline, and the milk of lime pump is connect with the circulating slot pipeline.
5. a kind of ultralow temperature denitrification apparatus of combination lime-gypsum method sulfur removal technology according to claim 4, feature exist
In: agitating device is provided in the preparation vessel.
6. a kind of ultralow temperature denitrification apparatus of combination lime-gypsum method sulfur removal technology according to claim 4, feature exist
In: between the preparation vessel and the milk of lime pump it is connected with filter.
7. a kind of ultralow temperature denitrification apparatus of combination lime-gypsum method sulfur removal technology according to claim 1, feature exist
In: it further include collecting pit, the tower bottom of the denitrating tower is connect with the collecting pit pipeline, the slot bottom of the circulating slot and the receipts
Collect the connection of pond pipeline.
8. a kind of ultralow temperature denitrification apparatus of combination lime-gypsum method sulfur removal technology according to claim 7, feature exist
In: the collecting pit pipeline is connected with filter charging pump, and the filter charging pump connects far from described collecting pit one end pipeline
It is connected to cyclone, the output end of the cyclone is connected with filter, is connected between the filter and the desulfurizing tower
Conveying pipeline, the filter are connected with moisture trap close to one end of the conveying pipeline, the cyclone input terminal with
Circulation pipe is connected between the conveying pipeline.
9. a kind of ultralow temperature denitrification apparatus of combination lime-gypsum method sulfur removal technology according to claim 1, feature exist
In: the oxidation fan is roots blower.
10. a kind of ultralow temperature denitrification apparatus of combination lime-gypsum method sulfur removal technology according to claim 1, feature
It is: is provided with two layers of primary demister in the desulfurizing tower.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811527363.5A CN109589765A (en) | 2018-12-13 | 2018-12-13 | Ultralow-temperature denitration device combined with lime-gypsum desulfurization process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811527363.5A CN109589765A (en) | 2018-12-13 | 2018-12-13 | Ultralow-temperature denitration device combined with lime-gypsum desulfurization process |
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| CN109589765A true CN109589765A (en) | 2019-04-09 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105311946A (en) * | 2015-12-09 | 2016-02-10 | 深圳广昌达环境科学有限公司 | Flue gas denitration and desulfuration washing system and denitration and desulfuration method |
| CN205055805U (en) * | 2015-09-18 | 2016-03-02 | 巴彦淖尔市飞尚铜业有限公司 | Environment collection cigarette desulfurization system is smelted to copper |
| CN106823717A (en) * | 2017-01-23 | 2017-06-13 | 湖北蔚天环保科技有限公司 | A kind of coke oven flue gas comprehensive treatment system |
| CN209475965U (en) * | 2018-12-13 | 2019-10-11 | 湖北蔚天环保科技有限公司 | Ultralow-temperature denitration device combined with lime-gypsum desulfurization process |
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2018
- 2018-12-13 CN CN201811527363.5A patent/CN109589765A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205055805U (en) * | 2015-09-18 | 2016-03-02 | 巴彦淖尔市飞尚铜业有限公司 | Environment collection cigarette desulfurization system is smelted to copper |
| CN105311946A (en) * | 2015-12-09 | 2016-02-10 | 深圳广昌达环境科学有限公司 | Flue gas denitration and desulfuration washing system and denitration and desulfuration method |
| CN106823717A (en) * | 2017-01-23 | 2017-06-13 | 湖北蔚天环保科技有限公司 | A kind of coke oven flue gas comprehensive treatment system |
| CN209475965U (en) * | 2018-12-13 | 2019-10-11 | 湖北蔚天环保科技有限公司 | Ultralow-temperature denitration device combined with lime-gypsum desulfurization process |
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