CN110141947A - A kind of coke oven flue gas carbon dioxide discharge-reduction technique and system - Google Patents
A kind of coke oven flue gas carbon dioxide discharge-reduction technique and system Download PDFInfo
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- CN110141947A CN110141947A CN201910447869.3A CN201910447869A CN110141947A CN 110141947 A CN110141947 A CN 110141947A CN 201910447869 A CN201910447869 A CN 201910447869A CN 110141947 A CN110141947 A CN 110141947A
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- 239000003546 flue gas Substances 0.000 title claims abstract description 87
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 85
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 83
- 239000000571 coke Substances 0.000 title claims abstract description 82
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 16
- 239000007789 gas Substances 0.000 claims abstract description 43
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 32
- 238000003795 desorption Methods 0.000 claims abstract description 32
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000000908 ammonium hydroxide Substances 0.000 claims abstract description 28
- 238000010521 absorption reaction Methods 0.000 claims abstract description 26
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 claims abstract description 22
- 229910000013 Ammonium bicarbonate Inorganic materials 0.000 claims abstract description 22
- 235000012538 ammonium bicarbonate Nutrition 0.000 claims abstract description 22
- 239000001099 ammonium carbonate Substances 0.000 claims abstract description 22
- 238000003763 carbonization Methods 0.000 claims abstract description 19
- 238000006243 chemical reaction Methods 0.000 claims abstract description 19
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 14
- 230000023556 desulfurization Effects 0.000 claims abstract description 14
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910052921 ammonium sulfate Inorganic materials 0.000 claims abstract description 13
- 235000011130 ammonium sulphate Nutrition 0.000 claims abstract description 13
- 238000010438 heat treatment Methods 0.000 claims abstract description 12
- 238000011084 recovery Methods 0.000 claims abstract description 11
- 239000002918 waste heat Substances 0.000 claims abstract description 11
- 239000003034 coal gas Substances 0.000 claims abstract description 10
- 239000000243 solution Substances 0.000 claims abstract description 10
- 239000007864 aqueous solution Substances 0.000 claims abstract description 8
- 230000008569 process Effects 0.000 claims abstract description 6
- 238000000746 purification Methods 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims abstract description 4
- 238000001556 precipitation Methods 0.000 claims abstract description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 30
- 229910021529 ammonia Inorganic materials 0.000 claims description 15
- 238000010025 steaming Methods 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 238000004064 recycling Methods 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 3
- 239000001257 hydrogen Substances 0.000 claims description 3
- 229910052739 hydrogen Inorganic materials 0.000 claims description 3
- -1 hydrogen ammonium salt Chemical class 0.000 claims description 3
- 239000012266 salt solution Substances 0.000 claims description 3
- 239000000779 smoke Substances 0.000 claims description 2
- 238000004458 analytical method Methods 0.000 claims 1
- 235000019504 cigarettes Nutrition 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 20
- 238000004939 coking Methods 0.000 abstract description 11
- 239000011280 coal tar Substances 0.000 abstract description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000010000 carbonizing Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 206010054949 Metaplasia Diseases 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 238000002679 ablation Methods 0.000 description 1
- HIVLDXAAFGCOFU-UHFFFAOYSA-N ammonium hydrosulfide Chemical compound [NH4+].[SH-] HIVLDXAAFGCOFU-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000015689 metaplastic ossification Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
- 239000002912 waste gas Substances 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
- B01D53/60—Simultaneously removing sulfur oxides and 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
- B01D53/46—Removing components of defined structure
- B01D53/62—Carbon 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
- B01D53/75—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
- B01D53/74—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
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
- Y02C20/00—Capture or disposal of greenhouse gases
- Y02C20/40—Capture or disposal of greenhouse gases of CO2
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Treating Waste Gases (AREA)
Abstract
The present invention relates to a kind of coke oven flue gas carbon dioxide discharge-reduction technique and system, the coke oven flue gas that coke oven heating system generates enters flue gas desulfurization and denitrification system for NOx and SO2Then removing recycles heat by flue gas waste heat recovery system, enters back into CO2Absorption system absorbs CO therein2After discharge, ammonium hydroxide and CO2The ammonium bicarbonate soln that reaction generates enters CO2Desorption system generates ammonium sulfate with sulfuric acid reaction in reactor and dissolves in aqueous solution, while CO is precipitated2Gas；The CO of precipitation2Gas enters the carbonization chamber of High T-emperature Carbonization system, reacts with indoor coal tar material is carbonized, and the CO of generation enters the collection of subsequent coal gas and purification system with the coal gas that retort process is precipitated；Solution by desorption reaction is sent by pipeline to the saturator of ammonium sulfate device.The present invention can effectively reduce coke oven flue gas CO2Discharge to atmosphere, the resource utilization for improving coking production exhaust gas are horizontal.
Description
Technical field
The present invention relates to cock-oven gas purifying technical field more particularly to a kind of coke oven flue gas carbon dioxide discharge-reduction technique and
System.
Background technique
In coking production process, for the coking production of integrated iron and steel works, generally use from blast furnace production process
Blast furnace gas (also known as poor gas) and on a small quantity by Mixture Density Networks made of gas cleaning system treated coke-stove gas doping
Gas provides thermal energy with air burning for coke oven production.For independent coking production enterprise, then coke oven itself production is generallyd use
The obtained coke-stove gas (also known as rich gas) by purification provides thermal energy with air burning for coke oven production.No matter mixing is used
Heated by gas or coke-stove gas heating, in the combustion chamber occur combustion reaction it is exothermic simultaneously, in coal gas it is carbon containing at
CO can be generated after divided combustion2, and under the high temperature conditions, the nitrogen in air, which can aoxidize, generates NOx, and the sulfide in coal gas can oxygen
Metaplasia is at SO2, these CO generated after burning2, NOx and SO2Can with burning waste gas together successively the bottom flue through coke oven, point
After flue, main chimney flue, it is discharged into atmosphere by coke oven chimney.In the exhaust gas of discharge, NOx and SO2It is that there is pollution to atmosphere
The pollutant of effect, under the requirement of increasingly harsh environmental protection policy and relevant laws and regulations, it is necessary to which it to the greatest extent may be used from exhaust gas
Energy ground removing, for this purpose, usually setting coke oven flue gas desulphurization denitration facility purifies coke oven flue gas.
" coking chemistry emission of industrial pollutants standard " (GB16171-2012) is directed to the pollution that coking production process generates
Object gives harsh emission limit, but to the CO generated in production2Discharge do not make corresponding regulation, therefore, right
In terms of the improvement of coke oven flue gas pollutant, people have only concentrated on focus to NOx in coke oven flue gas and SO at present2Emission reduction
In improvement, to CO in coke oven flue gas2Discharge rarely have concern.
But the CO of coking production process2Discharge also can not be ignored.The coke for being 1,000,000 tons/year with a coke production ability
It for changing production facility, is heated according to mixed gas, rough calculation about generates about 500,000 tons of CO every year2, only according to me
Nearly 1.2 hundred million tons of the data of integrated iron and steel works, state year coke output calculate, the coking production meeting of annual integrated iron and steel works, China
0.6 hundred million tons of CO is discharged to atmosphere2。
It is generally known that CO2It is generally acknowledged greenhouse gases, a large amount of discharges to atmosphere are to cause earth surface temperature liter
It is high, cause glacial ablation, the natural calamities such as sea level rise, hurricane, flood and arid an important factor for, increasingly by generation
How the concern of various countries, boundary and all kinds of international organizations reduces the CO of human production life activity generation2And its discharge to atmosphere
Become the important process direction of protection environment.
Therefore, in order to protect environment for the survival of mankind, pollution of the coking production enterprise to atmosphere is reduced, it is necessary to no
It is disconnected to improve coking production technique, develop the coke making process of clean and environmental protection.
Summary of the invention
The present invention provides a kind of coke oven flue gas carbon dioxide discharge-reduction technique and systems, can effectively reduce coke oven flue gas
CO2Discharge to atmosphere, the resource utilization for improving coking production exhaust gas are horizontal.
In order to achieve the above object, the present invention is implemented with the following technical solutions:
A kind of coke oven flue gas carbon dioxide discharge-reduction technique, includes the following steps:
1) coke oven flue gas that coke oven heating system generates initially enters flue gas desulfurization and denitrification system, will be in coke oven flue gas
NOx and SO2Removing；
2) heat that the coke oven flue gas after desulphurization denitration is carried by flue gas waste heat recovery system recycling, the coke oven after cooling
Flue gas enters CO2Absorption system absorbs the CO in coke oven flue gas using ammonium hydroxide2, remove CO2Afterwards by coke oven flue gas outlet drain,
Ammonium hydroxide and CO2The ammonium bicarbonate soln that reaction generates enters CO2Desorption system；
3) in CO2In desorption system, ammonium bicarbonate soln generates ammonium sulfate with sulfuric acid reaction in reactor and is dissolved in
In aqueous solution, while CO is precipitated2Gas；The CO of precipitation2Gas enters the carbonization chamber of High T-emperature Carbonization system, indoor with carbonizing
Coal tar material reacts, and the CO of generation is collected and purification system as the coal gas that retort process is precipitated enters subsequent coal gas；
Solution by desorption reaction is sent by pipeline to the saturator of ammonium sulfate device.
The CO2Absorption system includes at least a CO2Absorption tower；In CO2In absorption tower, coke oven flue gas with enter CO2It inhales
Receive the ammonium hydroxide counter current contacting of tower, the CO in flue gas2Chemical reaction generation ammonium hydrogen carbonate occurs with the ammonia in ammonium hydroxide and is dissolved in CO2
In the tower bottom solution on absorption tower, CO then is sent to from outlet at bottom by pipeline2Desorption system.
The ammonium hydroxide is the product ammonium hydroxide that ammonia steaming system obtains.
The CO2Desorption system includes at least a reactor, and reactor is closed container；Into CO2The carbon of desorption system
Sour hydrogen ammonium salt solution, with the sulfuric acid reaction of addition, generates ammonium sulfate and dissolves in aqueous solution in reactor, while CO is precipitated2Gas
Body.
For realizing the coke oven flue gas carbon dioxide discharge-reduction system of the technique, including sequentially connected coke oven heating system
System, flue gas desulfurization and denitrification system, flue gas waste heat recovery system, CO2Absorption system, CO2Desorption system and High T-emperature Carbonization system；
The coke oven flue gas outlet of the coke oven heating system connects the flue gas of flue gas desulfurization and denitrification system by coke oven flue gas conveyance conduit
The exhanst gas outlet of entrance, flue gas desulfurization and denitrification system connects CO by flue2The coke oven flue gas entrance of absorption system, flue gas
Flue gas waste heat recovery system is set on pipeline；CO2Absorption system sets ammonia inlet, coke oven flue gas entrance, neat stress outlet and carbonic acid
The outlet of hydrogen ammonium salt solution, wherein ammonia inlet connects external ammonium hydroxide conveyance conduit, ammonium bicarbonate soln outlet connection CO2Desorption system
Ammonium bicarbonate soln entrance, neat stress outlet connection neat stress discharge tube；CO2Desorption system set aqueous sulfuric acid entrance,
Ammonium bicarbonate soln entrance, CO2Desorption gas outlet and the outlet of parsing raffinate, wherein aqueous sulfuric acid entrance connects external sulfuric acid
Conveyance conduit, CO2Gas vent connects the carbonization chamber of High T-emperature Carbonization system, and the outlet of parsing raffinate connects sulphur ammonium dress by pipeline
The saturator set.
The product ammonium hydroxide outlet of the ammonium hydroxide conveyance conduit connection ammonia steaming system.
Compared with prior art, the beneficial effects of the present invention are:
1) coke-stove gas production quantity and calorific value are improved；The CO that will be captured from coke oven flue gas2It is added to coke furnace carbonization chamber, and
CO is generated at high temperature, can increase the occurrence quantity of coke-stove gas, while increasing the carbon component in coke-stove gas, is conducive to coke
The raising of producer gas calorific value；
2) CO is realized2Emission reduction；The CO in coke oven flue gas can be effectively removed through the invention2Ingredient avoids CO2Xiang great
The direct emission of gas, while by the CO of capture2Chemical conversion is carried out using the production technology of coke oven itself, realizes CO2Circulation
Using with recycling application, to environmental protection have positive promote meaning.
Detailed description of the invention
Fig. 1 is a kind of flow diagram of coke oven flue gas carbon dioxide discharge-reduction technique of the present invention.
In figure: 1. coke oven heating system, 2. flue gas desulfurization and denitrification system, 3. flue gas waste heat recovery system 4.CO2It inhales
Receipts system 5.CO26. High T-emperature Carbonization system of desorption system
Specific embodiment
Specific embodiments of the present invention will be further explained with reference to the accompanying drawing:
As shown in Figure 1, a kind of coke oven flue gas carbon dioxide discharge-reduction technique of the present invention, includes the following steps:
1) coke oven flue gas that coke oven heating system 1 generates initially enters flue gas desulfurization and denitrification system 2, will be in coke oven flue gas
NOx and SO2Removing；
2) heat that the coke oven flue gas after desulphurization denitration is carried by the recycling of flue gas waste heat recovery system 3, the coke after cooling
Kiln gas enters CO2Absorption system 4 absorbs the CO in coke oven flue gas using ammonium hydroxide2, remove CO2It exports and arranges by coke oven flue gas afterwards
It puts, ammonium hydroxide and CO2The ammonium bicarbonate soln that reaction generates enters CO2Desorption system 5；
3) in CO2In desorption system 5, ammonium bicarbonate soln generates ammonium sulfate with sulfuric acid reaction in reactor and is dissolved in
In aqueous solution, while CO is precipitated2Gas；The CO of precipitation2Gas enters the carbonization chamber of High T-emperature Carbonization system 6, indoor with carbonizing
Coal tar material reacts, and the CO of generation is collected and purification system as the coal gas that retort process is precipitated enters subsequent coal gas；
Solution by desorption reaction is sent by pipeline to the saturator of ammonium sulfate device.
The CO2Absorption system 4 includes at least a CO2Absorption tower；In CO2In absorption tower, coke oven flue gas with enter CO2
The ammonium hydroxide counter current contacting on absorption tower, the CO in flue gas2Chemical reaction generation ammonium hydrogen carbonate occurs with the ammonia in ammonium hydroxide and is dissolved in
CO2In the tower bottom solution on absorption tower, CO then is sent to from outlet at bottom by pipeline2Desorption system 5.
The ammonium hydroxide is the product ammonium hydroxide that ammonia steaming system obtains.
The CO2Desorption system 5 includes at least a reactor, and reactor is closed container；Into CO2Desorption system 5
Ammonium bicarbonate soln, with the sulfuric acid reaction of addition, generates ammonium sulfate and dissolves in aqueous solution in reactor, while CO is precipitated2
Gas.
For realizing the coke oven flue gas carbon dioxide discharge-reduction system of the technique, including sequentially connected coke oven heating system
1, flue gas desulfurization and denitrification system 2, flue gas waste heat recovery system 3, CO2Absorption system 4, CO2Desorption system 5 and High T-emperature Carbonization system
System 6；The coke oven flue gas outlet of the coke oven heating system 1 connects flue gas desulfurization and denitrification system 2 by coke oven flue gas conveyance conduit
Smoke inlet, the exhanst gas outlet of flue gas desulfurization and denitrification system 2 connects CO by flue2The coke oven flue gas of absorption system 4
Entrance sets flue gas waste heat recovery system 3 on flue；CO2Absorption system 4 sets ammonia inlet, coke oven flue gas entrance, neat stress
Outlet and ammonium bicarbonate soln outlet, wherein ammonia inlet connects external ammonium hydroxide conveyance conduit, ammonium bicarbonate soln outlet connection
CO2The ammonium bicarbonate soln entrance of desorption system 5, neat stress outlet connection neat stress discharge tube；CO2Desorption system 5 sets sulfuric acid
Aqueous solution entrance, ammonium bicarbonate soln entrance, CO2Desorption gas outlet and parsing raffinate export, wherein aqueous sulfuric acid entrance
Connect external sulfuric acid conveyance conduit, CO2Gas vent connects the carbonization chamber of High T-emperature Carbonization system 6, and the outlet of parsing raffinate passes through
The saturator of pipeline connection ammonium sulfate device.
The product ammonium hydroxide outlet of the ammonium hydroxide conveyance conduit connection ammonia steaming system.
Since the reactor is closed container, and each medium inlet and outlet should effectively be separated with atmosphere, therefore in reactor
Only CO2Gas exists
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (6)
1. a kind of coke oven flue gas carbon dioxide discharge-reduction technique, which comprises the steps of:
1) coke oven heating system generate coke oven flue gas initially enter flue gas desulfurization and denitrification system, by coke oven flue gas NOx and
SO2Removing；
2) heat that the coke oven flue gas after desulphurization denitration is carried by flue gas waste heat recovery system recycling, the coke oven flue gas after cooling
Into CO2Absorption system absorbs the CO in coke oven flue gas using ammonium hydroxide2, remove CO2Afterwards by coke oven flue gas outlet drain, ammonium hydroxide
With CO2The ammonium bicarbonate soln that reaction generates enters CO2Desorption system；
3) in CO2In desorption system, ammonium bicarbonate soln generates ammonium sulfate with sulfuric acid reaction in reactor and is dissolved in aqueous solution
In, while CO is precipitated2Gas；The CO of precipitation2Gas enters the carbonization chamber of High T-emperature Carbonization system, with the indoor tarry of charing
Material reacts, and the CO of generation is collected and purification system as the coal gas that retort process is precipitated enters subsequent coal gas；By solution
The solution for inhaling reaction is sent by pipeline to the saturator of ammonium sulfate device.
2. a kind of coke oven flue gas carbon dioxide discharge-reduction technique according to claim 1, which is characterized in that the CO2Absorb system
System includes at least a CO2Absorption tower；In CO2In absorption tower, coke oven flue gas with enter CO2The ammonium hydroxide counter current contacting on absorption tower, cigarette
CO in gas2Chemical reaction generation ammonium hydrogen carbonate occurs with the ammonia in ammonium hydroxide and is dissolved in CO2In the tower bottom solution on absorption tower, so
CO is sent to from outlet at bottom by pipeline afterwards2Desorption system.
3. a kind of coke oven flue gas carbon dioxide discharge-reduction technique according to claim 1, which is characterized in that the ammonium hydroxide is to steam
The product ammonium hydroxide that ammonia system obtains.
4. a kind of coke oven flue gas carbon dioxide discharge-reduction technique according to claim 1, which is characterized in that the CO2Desorption system
System includes at least a reactor, and reactor is closed container；Into CO2The ammonium bicarbonate soln of desorption system is in reactor
It with the sulfuric acid reaction of addition, generates ammonium sulfate and dissolves in aqueous solution, while CO is precipitated2Gas.
5. for realizing the coke oven flue gas carbon dioxide discharge-reduction system of any one technique described in claim 1-4, feature exists
In, including sequentially connected coke oven heating system, flue gas desulfurization and denitrification system, flue gas waste heat recovery system, CO2Absorption system,
CO2Desorption system and High T-emperature Carbonization system；The coke oven flue gas outlet of the coke oven heating system passes through coke oven flue gas delivery pipe
Road connects the smoke inlet of flue gas desulfurization and denitrification system, and the exhanst gas outlet of flue gas desulfurization and denitrification system is connected by flue
CO2The coke oven flue gas entrance of absorption system sets flue gas waste heat recovery system on flue；CO2Absorption system set ammonia inlet,
Coke oven flue gas entrance, neat stress outlet and ammonium bicarbonate soln outlet, wherein ammonia inlet connects external ammonium hydroxide conveyance conduit, carbon
Sour hydrogen ammonium salt solution outlet connection CO2The ammonium bicarbonate soln entrance of desorption system, neat stress outlet connection neat stress discharge tube；
CO2Desorption system sets aqueous sulfuric acid entrance, ammonium bicarbonate soln entrance, CO2Desorption gas outlet and the outlet of parsing raffinate,
Middle aqueous sulfuric acid entrance connects external sulfuric acid conveyance conduit, CO2Gas vent connects the carbonization chamber of High T-emperature Carbonization system, solution
Analyse the saturator that raffinate outlet connects ammonium sulfate device by pipeline.
6. a kind of coke oven flue gas carbon dioxide discharge-reduction system according to claim 5, which is characterized in that the ammonium hydroxide conveying
Pipeline connects the product ammonium hydroxide outlet of ammonia steaming system.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111632490A (en) * | 2020-05-27 | 2020-09-08 | 云南省能源研究院有限公司 | Treatment method for reducing carbon dioxide emission |
| CN112811440A (en) * | 2021-03-03 | 2021-05-18 | 西安热工研究院有限公司 | System and method for preparing ammonium sulfate by using boiler sulfur-containing flue gas |
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