CN109621653A - A kind of the coke oven flue gas ammonia method desulfurizing system and method for resourcebility recycling - Google Patents
A kind of the coke oven flue gas ammonia method desulfurizing system and method for resourcebility recycling Download PDFInfo
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- CN109621653A CN109621653A CN201811637771.6A CN201811637771A CN109621653A CN 109621653 A CN109621653 A CN 109621653A CN 201811637771 A CN201811637771 A CN 201811637771A CN 109621653 A CN109621653 A CN 109621653A
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- ammonium sulfate
- sulfate solution
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- ammonium
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- 230000003009 desulfurizing effect Effects 0.000 title claims abstract description 80
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 64
- 238000000034 method Methods 0.000 title claims abstract description 64
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 43
- 239000003546 flue gas Substances 0.000 title claims abstract description 43
- 229910021529 ammonia Inorganic materials 0.000 title claims abstract description 32
- 239000000571 coke Substances 0.000 title claims abstract description 28
- 238000004064 recycling Methods 0.000 title claims abstract description 17
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 claims abstract description 200
- 229910052921 ammonium sulfate Inorganic materials 0.000 claims abstract description 200
- 235000011130 ammonium sulphate Nutrition 0.000 claims abstract description 200
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 claims abstract description 92
- 239000007788 liquid Substances 0.000 claims abstract description 83
- 230000008569 process Effects 0.000 claims abstract description 29
- 238000007599 discharging Methods 0.000 claims abstract description 22
- 238000010992 reflux Methods 0.000 claims abstract description 10
- 239000000243 solution Substances 0.000 claims description 173
- 238000001514 detection method Methods 0.000 claims description 42
- 239000002253 acid Substances 0.000 claims description 36
- HIVLDXAAFGCOFU-UHFFFAOYSA-N ammonium hydrosulfide Chemical compound [NH4+].[SH-] HIVLDXAAFGCOFU-UHFFFAOYSA-N 0.000 claims description 27
- 239000007789 gas Substances 0.000 claims description 24
- 239000007921 spray Substances 0.000 claims description 19
- 238000004519 manufacturing process Methods 0.000 claims description 15
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 12
- 239000005864 Sulphur Substances 0.000 claims description 11
- 239000002002 slurry Substances 0.000 claims description 11
- PQUCIEFHOVEZAU-UHFFFAOYSA-N Diammonium sulfite Chemical compound [NH4+].[NH4+].[O-]S([O-])=O PQUCIEFHOVEZAU-UHFFFAOYSA-N 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims description 8
- 230000009471 action Effects 0.000 claims description 7
- 239000000428 dust Substances 0.000 claims description 7
- 238000012544 monitoring process Methods 0.000 claims description 7
- 238000012360 testing method Methods 0.000 claims description 7
- 239000012266 salt solution Substances 0.000 claims description 6
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 6
- 230000008676 import Effects 0.000 claims description 4
- 239000006228 supernatant Substances 0.000 claims description 4
- 150000003863 ammonium salts Chemical class 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 238000010521 absorption reaction Methods 0.000 claims 1
- 235000019504 cigarettes Nutrition 0.000 claims 1
- 239000012452 mother liquor Substances 0.000 abstract description 4
- 238000010276 construction Methods 0.000 abstract description 3
- 235000010269 sulphur dioxide Nutrition 0.000 description 38
- 238000006477 desulfuration reaction Methods 0.000 description 9
- 230000023556 desulfurization Effects 0.000 description 9
- 239000000126 substance Substances 0.000 description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 3
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 3
- 238000004939 coking Methods 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- JZRWCGZRTZMZEH-UHFFFAOYSA-N Thiamine Natural products CC1=C(CCO)SC=[N+]1CC1=CN=C(C)N=C1N JZRWCGZRTZMZEH-UHFFFAOYSA-N 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 238000002386 leaching Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 230000001376 precipitating effect Effects 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- KYMBYSLLVAOCFI-UHFFFAOYSA-N thiamine Chemical compound CC1=C(CCO)SCN1CC1=CN=C(C)N=C1N KYMBYSLLVAOCFI-UHFFFAOYSA-N 0.000 description 2
- 229960003495 thiamine Drugs 0.000 description 2
- 235000019157 thiamine Nutrition 0.000 description 2
- 239000011721 thiamine Substances 0.000 description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 210000004709 eyebrow Anatomy 0.000 description 1
- 210000000720 eyelash Anatomy 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- HNBFUFIYQWYCDM-UHFFFAOYSA-N oxygen(2-) sulfane titanium(4+) Chemical compound [O--].[O--].S.[Ti+4] HNBFUFIYQWYCDM-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000004291 sulphur dioxide Substances 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 230000032258 transport 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
- B01D53/46—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
- B01D53/504—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 device
-
- 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
- B01D53/73—After-treatment of removed components
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
- C01C1/00—Ammonia; Compounds thereof
- C01C1/24—Sulfates of ammonium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/206—Ammonium compounds
- B01D2251/2062—Ammonia
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Treating Waste Gases (AREA)
Abstract
The present invention relates to the coke oven flue gas ammonia method desulfurizing systems and method of a kind of recycling of resourcebility, system includes desulfurizing tower, settling tank, surge tank, ammonium sulfate solution pre-processes tank, the ammonium sulfate solution outlet of desulfurizing tower is connected by the inlet of discharging pump and settling tank, the liquid outlet of settling tank and the inlet of surge tank connect, the liquid outlet of surge tank is connect by delivery pump with the inlet that ammonium sulfate solution pre-processes tank, ammonium sulfate solution pre-processes tank and is equipped with acid-adding port, the ammonium sulfate solution liquid outlet of ammonium sulfate solution pretreatment tank is connected with ammonium sulfate solution pretreatment pump, the downstream of ammonium sulfate solution pretreatment pump is connect by return valve with the ammonium sulfate solution refluxing opening that ammonium sulfate solution pre-processes tank, the downstream of ammonium sulfate solution pretreatment pump is connect by delivery valve with coke-oven plant's ammonium sulfate workshop section mother liquor tank or saturator.It can be organically combined with the original ammonium sulfate workshop section in coke-oven plant, sulfur dioxide and can reduce ammonia method desulfurizing system construction cost in efficient removal coke oven flue gas, and simplify system.
Description
Technical field
The present invention relates to the coke oven flue gas ammonia process that environmentally friendly fume treatment technical field more particularly to a kind of resourcebility recycle
Desulphurization system and method.
Background technique
Currently, power industry has carried out comprehensive control to sulfur dioxide etc., the contamination control of coking industry is also compeled
In the eyebrows and eyelashes.Coking industry is atmospheric environment heavy polluted industry, according to the newest relevant criterion that Chinese Ministry of Environmental Protection promulgates, the master of coke oven flue gas
Want pollutant sulfur dioxide that qualified discharge is needed to need qualified discharge.
There are many sulfur methods, and common Wet Flue Gas Desulfurization Technique mainly has two kinds of the ammonia process of desulfurization and calcium method desulfurization, and ammonia process is de-
Sulphur removal efficiency is high, and by-product is ammonium sulfate, can be used for producing chemical fertilizer, has certain recovery value.But the ammonia process of desulfurization by
Dust is affected, and sulphur ammonium crystallizes susceptible.The systematic comparison of ammonia process of desulfurization thiamine recovery is complicated, and equipment is more, thiamine recovery
System building higher cost, system complex, maintenance difficulties are larger.
Summary of the invention
It is an object of the invention to overcome the defect of the prior art, a kind of coke oven flue gas ammonia of resourcebility recycling is provided
Method desulphurization system can be organically combined with the original ammonium sulfate workshop section in coke-oven plant, can in efficient removal coke oven flue gas sulfur dioxide and
Ammonia method desulfurizing system construction cost can be reduced, and simplifies system.
The present invention is implemented as follows: the present invention provides a kind of coke oven flue gas ammonia method desulfurizing system of resourcebility recycling,
Including desulfurizing tower, settling tank, surge tank, ammonium sulfate solution pre-process tank, the desulfurizing tower be successively arranged from top to bottom exhanst gas outlet,
The ammonium sulfate solution outlet of gas inlet, ammonium sulfate solution outlet, the desulfurizing tower is connected by the inlet of discharging pump and settling tank,
The liquid outlet of the settling tank and the inlet of surge tank connect, and the liquid outlet of surge tank is located by delivery pump with ammonium sulfate solution in advance
The inlet connection of tank is managed, ammonium sulfate solution pretreatment tank is additionally provided with acid-adding port, ammonium sulfate solution refluxing opening and ammonium sulfate solution liquid outlet,
The ammonium sulfate solution liquid outlet of the ammonium sulfate solution pretreatment tank is connected with ammonium sulfate solution pretreatment pump, the ammonium sulfate solution pretreatment
The downstream of pump is connect by return valve with the ammonium sulfate solution refluxing opening that ammonium sulfate solution pre-processes tank, the ammonium sulfate solution pretreatment
The downstream of pump is connected by the production system of delivery valve and the ammonium sulfate workshop section of coke-oven plant, for producing sulphur using sulphur ammonium slurries
Ammonium.
Further, spray equipment is equipped in the desulfurizing tower, the spray equipment is located at gas inlet and exhanst gas outlet
Between, the inlet of the spray equipment is connect with the ammonia spirit import that desulfurizing tower is arranged, for carrying out adverse current spray to flue gas
Leaching removes the sulfur dioxide in flue gas, generates ammonium sulfate.
Further, the middle and lower part of desulfurizing tower is arranged in the gas inlet, and desulfurizing tower is arranged in the exhanst gas outlet
The bottom of desulfurizing tower is arranged in top, the ammonium sulfate solution outlet.
Further, the acid-adding port of ammonium sulfate solution pretreatment tank is equipped with strong acid inlet valve, and the strong acid inlet valve is for controlling
Strong acid processed is added ammonium sulfate solution and pre-processes tank, and strong acid fills under the stirring action of ammonium sulfate solution pretreatment pump with ammonium sulfate
Divide mixing, the ammonium sulfite in solution is decomposed completely, parse sulfur dioxide, ammonium sulfate solution pre-processes tank and is equipped with sulfur dioxide
Outlet is connected to the gas inlet of desulfurizing tower, is back to the sulfur dioxide parsed in ammonium sulfate solution pretreatment tank in desulfurizing tower
It is absorbed again；The strong acid inlet valve uses autocontrol valve.The acid-adding port of ammonium sulfate solution pretreatment tank is connected with strong acid
Autocontrol valve is fed, is connect with sulfuric acid high position tank original in coke-oven plant.Because ammonium sulfate workshop section production in coke-oven plant's is needed using dense sulphur
Acid can use nearby.
Sulfur dioxide is back in the desulfurizing tower of desulphurization system, avoids secondary pollution.
Further, the liquid outlet of the settling tank is located at the upper end of settling tank.Further, it is equipped in the surge tank
Liquid level detection device and solution density detection device, the liquid level detection device, solution density detection device, delivery pump respectively with
Controller connection, liquid level signal, density signal for will test respectively pass to controller, and the controller is according to liquid level
Liquid level signal, the density signal of detection device and the transmitting of solution density detection device, control the working condition of delivery pump, work as buffering
After solution reaches the discharging liquid level of setting in tank, and density reaches setting value, delivery pump is opened, by the ammonium sulfate solution in surge tank
It is delivered to ammonium sulfate solution pretreatment tank.Liquid level detection device avoids liquid level is excessively high from causing slurries overflow.Solution density detection dress
It sets, achievees the purpose that monitor concentration by monitoring solution density, by controlled concentration, adjust discharging opportunity and period.Surge tank
After liquid level reaches discharging liquid level, after specified density (concentration) is reached such as solution, discharge pump work.Not up to density (concentration)
When, pump work is returned to, slurries are returned to desulfurizing tower, and the reaction was continued and concentration.
Further, liquid level detection device, the liquid level detection device, output are equipped in the ammonium sulfate solution pretreatment tank
Valve, return valve, ammonium sulfate solution pretreatment pump are connect with controller respectively, and the liquid level signal for will test passes to control
Device, the liquid level signal that the controller is transmitted according to liquid level detection device, the working condition of control ammonium sulfate solution pretreatment pump, when
After solution reaches certain liquid level in ammonium sulfate solution pretreatment tank, ammonium sulfate solution pretreatment pump is opened, close outflow valve opens reflux
Valve is stirred ammonium sulfate solution in pretreatment tank by ammonium sulfate solution pretreatment pump, after stirring specific time, closing volume
Valve opens delivery valve, and slurries are discharged by ammonium sulfate solution pretreatment pump.
Further, concentration detection apparatus is equipped in desulfurizing tower, the concentration detection apparatus is connect with controller, and being used for will
The concentration signal detected passes to controller, and the concentration signal that the controller is transmitted according to concentration detection apparatus controls out
The working condition of material pump will be in desulfurizing tower by discharging pump after the ammonium sulfate in desulfurizing tower is enriched to certain concentration
Ammonium sulfate be delivered in settling tank.Ammonium sulfate concentration in desulfurizing tower just starts after reaching requirement toward buffer-precipitation
Discharging in tank.
The present invention provides a kind of coke oven flue gas ammonia method desulfurizing method of resourcebility recycling, includes the following steps:
After coke oven flue gas enters desulfurizing tower, the spray equipment controlled in desulfurizing tower carries out countercurrent spray to flue gas, removes in flue gas
Sulfur dioxide, generate ammonium sulfate；
It after ammonium sulfate in desulfurizing tower is enriched to certain concentration, is delivered in settling tank by discharging pump, in settling tank
The liquid outlet of middle standing filtering dust, supernatant autoprecipitation tank enters the buffer tank, liquid level detection device, solution in surge tank
The liquid level and density of ammonium sulfate in device for detecting density real-time monitoring surge tank, when the solution in surge tank reaches discharging
Liquid level, and after density reaches setting value, delivery pump is opened, the solution in surge tank is delivered to ammonium sulfate solution pretreatment tank, together
When, ammonium sulfate solution pre-processes the liquid level of ammonium sulfate in the liquid level detection device real-time monitoring surge tank in tank, when sulphur ammonium is molten
After solution reaches certain liquid level in liquid pretreatment tank, ammonium sulfate solution pretreatment pump is opened, close outflow valve is opened return valve, led to
Crossing ammonium sulfate solution pretreatment pump is stirred ammonium sulfate solution in pretreatment tank；
It is then turned on strong acid inlet valve, strong acid is added, strong acid is molten with ammonium sulfate under the stirring action of ammonium sulfate solution pretreatment pump
Liquid is thoroughly mixed, and the ammonium sulfite in solution is decomposed completely, parses sulfur dioxide, and is back in desulfurizing tower and is carried out
It absorbs again；
Ammonium sulfate solution after parsing sulfur dioxide completely is pre-processed by ammonium sulfate solution and is pumped, is delivered to the sulphur ammonium work of coke-oven plant
The production system of section produces sulphur ammonium using ammonium sulfate solution.
After parsing sulfur dioxide, desulfurizing tower in the return desulphurization system of sulfur dioxide avoids secondary pollution.It parses in advance
The purpose of sulfur dioxide is the ammonium sulfate production system for preventing sulfur dioxide from sulphur ammonium slurries being followed to enter in coke-oven plant, titanium dioxide out
If sulphur parses in ammonium sulfate production system in coke-oven plant, the substances such as sulfurous acid can be generated in its pipe network, it can will be in coke-oven plant
The gas piping of sulphur ammonium system corrodes.
Further, strong acid uses the concentrated sulfuric acid, will not introduce new impurity.
Compared with prior art, the invention has the following advantages:
The present invention carries out countercurrent spray to flue gas using desulfurizing tower, removes the sulfur dioxide in flue gas, generates ammonium sulfate.Ammonia
Ammonium sulfate solution after method desulfurization is delivered to settling tank by discharging pump, and for precipitating the dust filtered out in solution, supernatant enters
Surge tank.Ammonium sulfate solution in surge tank contains ammonium sulfate and a small amount of ammonium sulfite, is delivered to sulphur by ammonium sulfate solution delivery pump
Ammonium salt solution pre-processes tank, carries out enriching sulfur acid pretreatment in sulphur ammonium pretreatment tank, pretreated ammonium sulfate solution directly transports
To coke-oven plant's ammonium sulfate workshop section mother liquor tank or saturator.After ammonium sulfate solution after the ammonia process of desulfurization is by above-mentioned preliminary pretreatment, directly
It send to coke-oven plant's ammonium sulfate workshop section, the present invention is organically combined with the original ammonium sulfate workshop section in coke-oven plant, it can efficient removal coke oven
Sulfur dioxide in flue gas, and ammonia method desulfurizing system construction cost can be reduced, and simplify system, save great amount of investment and operation dimension
Shield expense.
Strong acid inlet valve is opened, strong acid is added, strong acid fills under the action of ammonium sulfate solution is pre-processed and pumped with ammonium sulfate
Divide and be stirred, the ammonium sulfite in solution is decomposed completely, parse sulfur dioxide, sulfur dioxide, which returns in desulphurization system, to be taken off
Sulphur tower, avoids secondary pollution, and the purpose for parsing sulfur dioxide in advance is to prevent sulfur dioxide from sulphur ammonium slurries being followed to enter coking
Ammonium sulfate production system in factory can generate if sulfur dioxide parses in ammonium sulfate production system in coke-oven plant in its pipe network
The substances such as sulfurous acid can corrode the gas piping of sulphur ammonium system in coke-oven plant.
Detailed description of the invention
Fig. 1 is the schematic diagram for the coke oven flue gas ammonia method desulfurizing system that a kind of resourcebility of the invention recycles.
In attached drawing, 1 is desulfurizing tower；2 be discharging pump；3 be settling tank；4 be surge tank；5 be delivery pump；6 be ammonium sulfate solution
Pre-process tank；7 be ammonium sulfate solution pretreatment pump；8 be the production system of ammonium sulfate workshop section.
Specific embodiment
The following is a clear and complete description of the technical scheme in the embodiments of the invention, it is clear that described embodiment
Only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, the common skill in this field
Art personnel all other embodiment obtained without making creative work belongs to the model that the present invention protects
It encloses.
Referring to Fig. 1, the present invention provides a kind of coke oven flue gas ammonia method desulfurizing system of resourcebility recycling, including desulfurizing tower 1,
Settling tank 3, surge tank 4, ammonium sulfate solution pre-process tank 6, the desulfurizing tower be successively arranged from top to bottom exhanst gas outlet, flue gas into
The ammonium sulfate solution outlet of mouth, ammonium sulfate solution outlet, the desulfurizing tower is connect by discharging pump 2 with the inlet of settling tank, described
The liquid outlet of settling tank and the inlet of surge tank connect, and the liquid outlet of surge tank is pre-processed by delivery pump 5 and ammonium sulfate solution
The inlet of tank connects, and ammonium sulfate solution pretreatment tank is additionally provided with acid-adding port, ammonium sulfate solution refluxing opening and ammonium sulfate solution liquid outlet, institute
The ammonium sulfate solution liquid outlet for stating ammonium sulfate solution pretreatment tank is connected with ammonium sulfate solution pretreatment pump 7, the ammonium sulfate solution pretreatment
The downstream of pump is connect by return valve with the ammonium sulfate solution refluxing opening that ammonium sulfate solution pre-processes tank, the ammonium sulfate solution pretreatment
The downstream of pump is connected by the production system 8 of delivery valve and the ammonium sulfate workshop section of coke-oven plant, for producing sulphur using sulphur ammonium slurries
Ammonium.The downstream of ammonium sulfate solution pretreatment pump can be with coke-oven plant's ammonium sulfate workshop section mother liquor tank by delivery valve as described in the embodiment
Or saturator connection.
The present invention is by reacting with ammonia water, by the Sulphur Dioxide in flue gas at ammonium sulfate, and by existing in coke-oven plant
There is ammonium sulfate workshop section to be recycled.
Further, spray equipment is equipped in the desulfurizing tower, the spray equipment is located at gas inlet and exhanst gas outlet
Between, the inlet of the spray equipment is connect with the ammonia spirit import that desulfurizing tower is arranged, for carrying out adverse current spray to flue gas
Leaching removes the sulfur dioxide in flue gas, generates ammonium sulfate.
Further, the middle and lower part of desulfurizing tower is arranged in the gas inlet, and desulfurizing tower is arranged in the exhanst gas outlet
The bottom of desulfurizing tower is arranged in top, the ammonium sulfate solution outlet.
Further, the liquid outlet of the settling tank is located at the upper end of settling tank.
Further, liquid level detection device and solution density detection device, the level sensing are equipped in the surge tank
Device, solution density detection device, delivery pump are connect with controller respectively, liquid level signal, density for will test respectively
Signal passes to controller, liquid level signal that the controller is transmitted according to liquid level detection device and solution density detection device,
Density signal controls the working condition of delivery pump, and when solution reaches the discharging liquid level of setting in surge tank, and density reaches setting
After value, delivery pump is opened, the ammonium sulfate solution in surge tank is delivered to ammonium sulfate solution pretreatment tank.
Further, the acid-adding port of ammonium sulfate solution pretreatment tank is equipped with strong acid inlet valve, and the strong acid inlet valve is for controlling
Strong acid processed is added ammonium sulfate solution and pre-processes tank, and strong acid fills under the stirring action of ammonium sulfate solution pretreatment pump with ammonium sulfate
Divide mixing, the ammonium sulfite in solution is decomposed completely, parse sulfur dioxide, ammonium sulfate solution pre-processes tank and is equipped with sulfur dioxide
Outlet is connected to the gas inlet of desulfurizing tower, is back to the sulfur dioxide parsed in ammonium sulfate solution pretreatment tank in desulfurizing tower
It is absorbed again；The strong acid inlet valve uses autocontrol valve.
Sulfur dioxide is back in the desulfurizing tower of desulphurization system, avoids secondary pollution.
Further, liquid level detection device, the liquid level detection device, output are equipped in the ammonium sulfate solution pretreatment tank
Valve, return valve, ammonium sulfate solution pretreatment pump are connect with controller respectively, and the liquid level signal for will test passes to control
Device, the liquid level signal that the controller is transmitted according to liquid level detection device, the working condition of control ammonium sulfate solution pretreatment pump, when
After solution reaches certain liquid level in ammonium sulfate solution pretreatment tank, ammonium sulfate solution pretreatment pump is opened, close outflow valve opens reflux
Valve is stirred ammonium sulfate solution in pretreatment tank by ammonium sulfate solution pretreatment pump.
Further, the acid-adding port of ammonium sulfate solution pretreatment tank is connected with strong acid inlet valve.
Further, concentration detection apparatus is equipped in desulfurizing tower, the concentration detection apparatus is connect with controller, and being used for will
The concentration signal detected passes to controller, and the concentration signal that the controller is transmitted according to concentration detection apparatus controls out
The working condition of material pump will be in desulfurizing tower by discharging pump after the ammonium sulfate in desulfurizing tower is enriched to certain concentration
Ammonium sulfate be delivered in settling tank.
The present invention provides a kind of coke oven flue gas ammonia method desulfurizing method of resourcebility recycling, includes the following steps:
After coke oven flue gas enters desulfurizing tower, the spray equipment controlled in desulfurizing tower carries out countercurrent spray to flue gas, removes in flue gas
Sulfur dioxide, generate ammonium sulfate；
It after ammonium sulfate in desulfurizing tower is enriched to certain concentration, is delivered in settling tank by discharging pump, in settling tank
The liquid outlet of middle standing filtering dust, supernatant autoprecipitation tank enters the buffer tank, liquid level detection device, solution in surge tank
The liquid level and density of ammonium sulfate in device for detecting density real-time monitoring surge tank, when the solution in surge tank reaches discharging
Liquid level, and density reaches setting value such as 1.26~1.30g/cm3Afterwards, delivery pump is opened, the solution in surge tank is delivered to sulphur
Ammonium salt solution pre-processes tank, meanwhile, it is molten that ammonium sulfate solution pre-processes ammonium sulfate in the liquid level detection device real-time monitoring surge tank in tank
The liquid level of liquid opens ammonium sulfate solution pretreatment pump, closes output after solution reaches certain liquid level in ammonium sulfate solution pretreatment tank
Valve opens return valve, is stirred ammonium sulfate solution in pretreatment tank by ammonium sulfate solution pretreatment pump；Ammonium sulfate solution is located in advance
It is stirred in reason tank using the reflux of ammonium sulfate solution pretreatment pump.
It is then turned on strong acid inlet valve, the strong acid such as concentrated sulfuric acid is added, the strong acid such as concentrated sulfuric acid is in ammonium sulfate solution pretreatment pump
It under stirring action, is thoroughly mixed with ammonium sulfate, the ammonium sulfite in solution is decomposed completely, parses titanium dioxide
Sulphur, sulfur dioxide return to desulfurizing tower in desulphurization system and are absorbed again, avoid secondary pollution.Sulfur dioxide is parsed in advance
Purpose is the ammonium sulfate production system for preventing sulfur dioxide from sulphur ammonium slurries being followed to enter in coke-oven plant, if sulfur dioxide is in coke-oven plant
It is parsed in interior ammonium sulfate production system, the substances such as sulfurous acid can be generated in its pipe network, it can be by the coal of sulphur ammonium system in coke-oven plant
Feed channel corrosion.
Ammonium sulfate solution after parsing sulfur dioxide completely is pre-processed by ammonium sulfate solution and is pumped, is delivered to the sulphur of coke-oven plant
The production system of ammonium workshop section produces sulphur ammonium using ammonium sulfate solution.
Ammonium sulfate solution is exported to coke-oven plant's ammonium sulfate workshop section mother liquor tank or is satisfied by ammonium sulfate solution pretreatment pump by the present embodiment
And device, that is, the production system of the ammonium sulfate workshop section of coke-oven plant is entered, directly can produce sulphur ammonium using the sulphur ammonium slurries of desulfurization zone.
It is introduced into settling tank precipitating before ammonium sulfate solution discharging, removes the apparent dust particles in part in ammonium sulfate solution, effectively
The influence for avoiding dust from growing up too much to sulphur ammonium crystallization and crystal, avoids the interference to sulphur ammonium crystallization section.
In ammonium sulfate after the ammonia process of desulfurization, contain part ammonium sulfite.Ammonium sulfate solution is into before saturator, into sulphur
Ammonium salt solution pre-processes tank and carries out acid adding pretreatment.Solution is delivered to sulphur by ammonium sulfate solution delivery pump in ammonium sulfate solution surge tank
After ammonium salt solution surge tank, using the original strong acid of coke-oven plant's ammonium sulfate workshop section, excessive strong acid is added in tank, sharply with ammonium sulfite
It reacts and largely parses sulfur dioxide, after parsing sulfur dioxide, desulfurizing tower in the return desulphurization system of sulfur dioxide is avoided
Secondary pollution, and effectively avoiding sulfur dioxide enters coke oven gas system corrosive pipeline coke oven gas pipe.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of coke oven flue gas ammonia method desulfurizing system of resourcebility recycling, it is characterised in that: including desulfurizing tower, settling tank, delay
Tank, ammonium sulfate solution pretreatment tank are rushed, the desulfurizing tower is successively arranged exhanst gas outlet, gas inlet, ammonium sulfate solution from top to bottom and goes out
Mouthful, the ammonium sulfate solution outlet of the desulfurizing tower is connected by the inlet of discharging pump and settling tank, the liquid outlet of the settling tank
It being connect with the inlet of surge tank, the liquid outlet of surge tank is connect by delivery pump with the inlet that ammonium sulfate solution pre-processes tank,
Ammonium sulfate solution pretreatment tank is additionally provided with acid-adding port, ammonium sulfate solution refluxing opening and ammonium sulfate solution liquid outlet, and the ammonium sulfate solution is located in advance
The ammonium sulfate solution liquid outlet of reason tank is connected with ammonium sulfate solution pretreatment pump, and the downstream of the ammonium sulfate solution pretreatment pump passes through back
Stream valve is connect with the ammonium sulfate solution refluxing opening of ammonium sulfate solution pretreatment tank, and the downstream of the ammonium sulfate solution pretreatment pump passes through defeated
The production system of valve and the ammonium sulfate workshop section of coke-oven plant connects out, for producing sulphur ammonium using sulphur ammonium slurries.
2. the coke oven flue gas ammonia method desulfurizing system of resourcebility recycling according to claim 1, it is characterised in that: described de-
Spray equipment is equipped in sulphur tower, the spray equipment is between gas inlet and exhanst gas outlet, the feed liquor of the spray equipment
Mouth is connect with the ammonia spirit import of desulfurizing tower setting, for carrying out countercurrent spray to flue gas, the sulfur dioxide in removing flue gas,
Generate ammonium sulfate.
3. the coke oven flue gas ammonia method desulfurizing system of resourcebility recycling according to claim 1, it is characterised in that: the cigarette
The middle and lower part of desulfurizing tower is arranged in gas import, and the top of desulfurizing tower is arranged in the exhanst gas outlet, and the ammonium sulfate solution outlet is set
It sets in the bottom of desulfurizing tower.
4. the coke oven flue gas ammonia method desulfurizing system of resourcebility recycling according to claim 1, it is characterised in that: sulphur ammonium is molten
The acid-adding port that liquid pre-processes tank is equipped with strong acid inlet valve, and ammonium sulfate solution pretreatment is added for controlling strong acid in the strong acid inlet valve
Tank, strong acid are sufficiently mixed, by the ammonium sulfite in solution under the stirring action of ammonium sulfate solution pretreatment pump with ammonium sulfate
It decomposes completely, parses sulfur dioxide, ammonium sulfate solution pre-processes tank and is equipped with sulfur dioxide and exports to be connected with the gas inlet of desulfurizing tower
It is logical, it is back to the sulfur dioxide parsed in ammonium sulfate solution pretreatment tank in desulfurizing tower and is absorbed；The strong acid inlet valve
Using autocontrol valve.
5. the coke oven flue gas ammonia method desulfurizing system of resourcebility recycling according to claim 1, it is characterised in that: described heavy
The liquid outlet of shallow lake tank is located at the upper end of settling tank.
6. the coke oven flue gas ammonia method desulfurizing system of resourcebility recycling according to claim 1, it is characterised in that: described slow
It rushes and is equipped with liquid level detection device and solution density detection device in tank, it is the liquid level detection device, solution density detection device, defeated
Pump is sent to connect respectively with controller, the liquid level signal, density signal for will test respectively pass to controller, the control
Liquid level signal, the density signal that device is transmitted according to liquid level detection device and solution density detection device, control the work of delivery pump
State opens delivery pump, by surge tank after solution reaches the discharging liquid level of setting, and density reaches setting value in surge tank
In ammonium sulfate solution be delivered to ammonium sulfate solution pretreatment tank.
7. the coke oven flue gas ammonia method desulfurizing system of resourcebility recycling according to claim 1, it is characterised in that: the sulphur
Ammonium salt solution, which pre-processes, is equipped with liquid level detection device in tank, the liquid level detection device, delivery valve, return valve, ammonium sulfate solution are located in advance
Reason pump is connect with controller respectively, and the liquid level signal for will test passes to controller, and the controller is examined according to liquid level
Survey the liquid level signal of device transmitting, the working condition of control ammonium sulfate solution pretreatment pump, when solution in ammonium sulfate solution pretreatment tank
After reaching certain liquid level, ammonium sulfate solution pretreatment pump is opened, close outflow valve is opened return valve, pre-processed by ammonium sulfate solution
Pump is stirred ammonium sulfate solution in pretreatment tank, and after stirring specific time, closing volume valve opens delivery valve, passes through sulphur
Slurries are discharged ammonium salt solution pretreatment pump.
8. the coke oven flue gas ammonia method desulfurizing system of resourcebility recycling according to claim 1, it is characterised in that: desulfurizing tower
Interior to be equipped with concentration detection apparatus, the concentration detection apparatus is connect with controller, and the concentration signal for will test passes to
Controller, the concentration signal that the controller is transmitted according to concentration detection apparatus control the working condition of discharging pump, work as desulfurizing tower
After interior ammonium sulfate is enriched to certain concentration, the ammonium sulfate in desulfurizing tower is delivered to by settling tank by discharging pump
In.
9. a kind of coke oven flue gas ammonia method desulfurizing method of resourcebility recycling, which comprises the steps of:
1) after coke oven flue gas enters desulfurizing tower, the spray equipment controlled in desulfurizing tower carries out countercurrent spray to flue gas, removes flue gas
In sulfur dioxide, generate ammonium sulfate；
2) it after the ammonium sulfate in desulfurizing tower is enriched to certain concentration, is delivered in settling tank, is being precipitated by discharging pump
Filtering dust is stood in tank, the liquid outlet of supernatant autoprecipitation tank enters the buffer tank, liquid level detection device in surge tank, molten
The liquid level and density of ammonium sulfate in liquid device for detecting density real-time monitoring surge tank, when the solution in surge tank reaches out
Feed liquid position, and after density reaches setting value, delivery pump is opened, the solution in surge tank is delivered to ammonium sulfate solution pretreatment tank,
Meanwhile ammonium sulfate solution pre-processes the liquid level of ammonium sulfate in the liquid level detection device real-time monitoring surge tank in tank, works as sulphur ammonium
After solution reaches certain liquid level in solution pretreatment tank, ammonium sulfate solution pretreatment pump is opened, close outflow valve opens return valve,
Ammonium sulfate solution is stirred in pretreatment tank by ammonium sulfate solution pretreatment pump；
3) it is then turned on strong acid inlet valve, strong acid is added, strong acid is under the stirring action of ammonium sulfate solution pretreatment pump, with ammonium sulfate
Solution is sufficiently mixed, and the ammonium sulfite in solution is decomposed completely, parses sulfur dioxide, and is back in desulfurizing tower and is carried out again
Secondary absorption；
4) ammonium sulfate solution after sulfur dioxide is parsed completely, is pre-processed and is pumped by ammonium sulfate solution, is delivered to the sulphur ammonium of coke-oven plant
The production system of workshop section produces sulphur ammonium using ammonium sulfate solution.
10. according to the method described in claim 9, it is characterized by: strong acid uses the concentrated sulfuric acid.
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