CN110452724A - A kind of clean coking process and system - Google Patents
A kind of clean coking process and system Download PDFInfo
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- CN110452724A CN110452724A CN201910718811.8A CN201910718811A CN110452724A CN 110452724 A CN110452724 A CN 110452724A CN 201910718811 A CN201910718811 A CN 201910718811A CN 110452724 A CN110452724 A CN 110452724A
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- coke
- coal
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- 238000004939 coking Methods 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 28
- 230000008569 process Effects 0.000 title claims abstract description 21
- 239000000571 coke Substances 0.000 claims abstract description 166
- 239000003546 flue gas Substances 0.000 claims abstract description 130
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 124
- 238000010438 heat treatment Methods 0.000 claims abstract description 47
- 238000003763 carbonization Methods 0.000 claims abstract description 43
- 239000003034 coal gas Substances 0.000 claims abstract description 39
- 239000001257 hydrogen Substances 0.000 claims abstract description 38
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 38
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 33
- 238000001816 cooling Methods 0.000 claims abstract description 27
- 238000000746 purification Methods 0.000 claims abstract description 17
- 239000007789 gas Substances 0.000 claims description 93
- 238000002485 combustion reaction Methods 0.000 claims description 23
- 230000001172 regenerating effect Effects 0.000 claims description 19
- 239000002918 waste heat Substances 0.000 claims description 19
- 239000003245 coal Substances 0.000 claims description 18
- 238000011084 recovery Methods 0.000 claims description 16
- 238000005338 heat storage Methods 0.000 claims description 14
- 239000000047 product Substances 0.000 claims description 14
- 239000002737 fuel gas Substances 0.000 claims description 13
- 239000000567 combustion gas Substances 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims description 8
- 150000002431 hydrogen Chemical class 0.000 claims description 7
- 238000009833 condensation Methods 0.000 claims description 6
- 230000005494 condensation Effects 0.000 claims description 6
- 238000000197 pyrolysis Methods 0.000 claims description 6
- 239000011280 coal tar Substances 0.000 claims description 5
- 239000000779 smoke Substances 0.000 claims description 5
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 4
- 239000006227 byproduct Substances 0.000 claims description 4
- 238000004821 distillation Methods 0.000 claims description 4
- 239000012535 impurity Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 238000000926 separation method Methods 0.000 claims description 4
- 239000011269 tar Substances 0.000 claims description 4
- 239000000908 ammonium hydroxide Substances 0.000 claims description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 230000008859 change Effects 0.000 claims description 3
- 238000006477 desulfuration reaction Methods 0.000 claims description 3
- 230000023556 desulfurization Effects 0.000 claims description 3
- 229930195733 hydrocarbon Natural products 0.000 claims description 3
- 150000002430 hydrocarbons Chemical class 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 230000009466 transformation Effects 0.000 claims description 3
- 238000005192 partition Methods 0.000 claims description 2
- 239000011335 coal coke Substances 0.000 claims 1
- 238000007781 pre-processing Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 22
- 239000005431 greenhouse gas 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 4
- 230000009467 reduction Effects 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- 235000011114 ammonium hydroxide Nutrition 0.000 description 3
- 238000004140 cleaning 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
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 235000019504 cigarettes Nutrition 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 238000002679 ablation Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 230000000630 rising effect Effects 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
- 238000004073 vulcanization Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
- C10B53/04—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form of powdered coal
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Industrial Gases (AREA)
Abstract
The present invention relates to a kind of clean coking process and systems, collect the system comprises coke oven heating system, High T-emperature Carbonization system, coal gas and mention hydrogen system, coke oven flue gas pretreatment system and coke oven flue gas cooling system with purification system, coal gas；The present invention can effectively reduce or avoid the generation of atmosphere pollution in coking production process, produce clean energy products, and the resource utilization for improving coking production process is horizontal, reduces the discharge of coking production process greenhouse gases, construct green coking production technique.
Description
Technical field
The present invention relates to coking of coal technical field more particularly to a kind of clean coking process and systems.
Background technique
Coking is the process through high-temperature retorting conversion coke and coal gas with the coal for being suitble to coking.Currently, being led in coking of coal
What domain was most widely used is mechanization heat accumulation coke oven, forms refining in the form of carbonization chamber and combustion chamber adjacent spaces arrangement
Oven battery.In the combustion chamber, it is sent out after being mixed with air for the combustion gas (coke-stove gas or other types combustion gas) to coke oven heating
Raw combustion reaction, while releasing amount of heat.The heat that burning generates is passed to by the furnace wall between combustion chamber and carbonization chamber
Carbonize indoor coal charge, coal charge under continual high temperature heat supply effect in carbonization chamber by destructive distillation coke, simultaneously
Volatile component forms raw coke oven gas under high temperature action in coal charge.The raw coke oven gas that coal charge destructive distillation obtains in carbonization chamber is passing through coke oven
Cooled when the tedge at top, bridge tube by cyclic ammonia water, at the same the ingredients such as tar in raw coke oven gas be condensed after with coal gas
Separation, collects using coke-stove gas gas collecting tube and directs into gas cleaning system.Coke in gas cleaning system, in coal gas
Impurity such as oil, ammonia, benzene, sulphur and wherein valuable ingredient is efficiently separated out, and pass through corresponding producing process
Processing forms the chemical products of various high added values.
In the above process, in coke oven heating, for the coking production of integrated iron and steel works, generally use raw from blast furnace
The blast furnace gas (also known as poor gas) of production process and on a small quantity by made of gas cleaning system treated coke-stove gas doping
Mixed gas provides thermal energy with air burning for coke oven production.For independent coking production enterprise, then coke oven is generallyd use certainly
The coke-stove gas (also known as rich gas) by purification that body produces provides thermal energy with air burning for coke oven production.No matter make
With mixed gas heating or coke-stove gas heating, generation combustion reaction is exothermic simultaneously in the combustion chamber, in coal gas
CO can be generated after carbonaceous component burning2, and under the high temperature conditions, the nitrogen in air, which can aoxidize, generates NOx, the vulcanization in coal gas
Object, which can aoxidize, generates SO2, these CO generated after burning2, NOx and SO2The small of coke oven can be sequentially entered together with burning waste gas
Flue divides flue, main chimney flue, is discharged into atmosphere finally by coke oven chimney.In the exhaust gas of discharge, NOx and SO2It is to atmosphere
Pollutant with contamination, under the requirement of increasingly harsh environmental protection policy and laws and regulations, it is necessary to by it from exhaust gas
It removes as much as possible, for this purpose, usually setting coke oven flue gas desulphurization denitration facility purifies coke oven flue gas.And in exhaust gas
CO2It is generally acknowledged greenhouse gases, a large amount of discharges to atmosphere are to cause earth surface temperature to increase, cause glacial ablation, sea
An important factor for natural calamities such as plane rising, hurricane, flood and arid, therefore also increasingly by countries in the world and all kinds of
How the concern of international organization reduces the CO of human production life activity generation2And its discharge to atmosphere becomes protection ring
The important process direction in border.
In current coking production technology, for the NOx and SO generated in Heating Process in Coke Oven2Although can pass through
Desulphurization denitration facility is set, purified treatment is carried out to coke oven flue gas, but the construction and operation of desulphurization denitration facility need coking production
Enterprise constantly puts into more expenses and energy.And for the CO in coke oven exhaust gas2, then there are no implement effective emission reduction to arrange
It applies.
By taking a coke production ability is 1,000,000 tons/year of coking production facility as an example, heated according to mixed gas,
Rough calculation, about generates about 500,000 tons of CO every year2, only according to integrated iron and steel works, China years nearly 1.2 hundred million tons of coke output
Data calculate, the coking production of annual integrated iron and steel works, China can discharge 0.6 hundred million tons of CO to atmosphere2。
As it can be seen that reducing pollution of the coking production enterprise to atmosphere, it is necessary to no to protect environment for the survival of mankind
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 clean coking process and system, it can effectively reduce or avoid and is big in coking production process
The generation of gas pollutant produces clean energy products, and the resource utilization for improving coking production process is horizontal, reduces coking production
The discharge of process greenhouse gases constructs green coking production technique.
In order to achieve the above object, the present invention is implemented with the following technical solutions:
A kind of clean coking process, includes the following steps:
1) in the combustion chamber of coke oven heating system, oxygen and coke-stove gas full combustion simultaneously discharge heat, to coal high temperature
Indoor coal charge is carbonized in distillation system carries out heating destructive distillation；
2) the coke oven flue gas main component generated after coke oven heating system burning is CO2、H2O and a small amount of SO2, coke oven
Flue gas enters coke oven flue gas pretreatment system；In coke oven flue gas pretreatment system, more than coke oven flue gas progress desulfurization and recycling
Heat；
3) coke oven flue gas after pretreatment enters coke oven flue gas cooling system；In coke oven flue gas cooling system, flue gas
In vapor be condensed into as liquid condensation water, and recycled by condensation water recovery system；
4) removing the main component of the coke oven flue gas after vapor is CO2, it is CO by main component2Coke oven flue gas send to
In the carbonization chamber of High T-emperature Carbonization system；In carbonization chamber, CO2It contacts and chemically reacts with high temperature coal tar material, CO2Turned
It turns to CO, and is collected and purification system as the coke-stove gas generated in carbonization chamber is discharged into coal gas by tedge, to realize
CO2Resourcable transformation；
5) enter coal gas and collect the coke-stove gas with purification system after cooling, purification, remove impurity therein, obtain phase
Tar, ammonium hydroxide, benzene-type products and the byproduct answered, purified coke-stove gas enter coal gas and mention hydrogen system；
6) it is mentioned in hydrogen system in coal gas, the Hydrogen Separation in coke-stove gas is come out and is used as product hydrogen, the coke after mentioning hydrogen
Producer gas is returned in coke oven heating system and is used as combustion gas as product coal gas, a portion coke-stove gas.
In the coke oven heating system, combustion-supporting gas uses pure oxygen, purified, mention in the coke-stove gas after hydrogen and contain CH4、
CO and other hydrocarbons.
The coke oven flue gas that the coke oven heating system generates through regenerative chamber, bottom flue, to divide flue and main chimney flue to collect laggard
Enter coke oven flue gas pretreatment system.
Heat storage is set in the regenerative chamber, is cooled to 300 DEG C after the coke oven flue gas of regenerative chamber and heat storage heat exchange
Hereinafter, coke oven flue gas after cooling enters back into coke oven flue gas pretreatment system；The coke oven flue gas pretreatment system includes flue gas
Desulphurization system and flue gas waste heat recovery system, flue gas desulphurization system remove the SO in coke oven flue gas2, flue gas waste heat recovery system pair
The waste heat of coke oven flue gas is recycled.
Heat storage is set in the regenerative chamber, can also be cooled to after the coke oven flue gas of regenerative chamber and heat storage heat exchange
150 DEG C hereinafter, coke oven flue gas after cooling enters back into coke oven flue gas pretreatment system；The coke oven flue gas pretreatment system includes
Flue gas desulphurization system and flue gas waste heat recovery system, coke oven flue gas first pass through flue gas waste heat recovery system to the waste heat of coke oven flue gas
It is recycled, enters back into flue gas desulphurization system removing SO2, the flue gas desulphurization system is using active coke desulphurizing system.
A kind of clean coking system, including coke oven heating system, High T-emperature Carbonization system, coal gas collect with purification system,
Coal gas mentions hydrogen system, coke oven flue gas pretreatment system and coke oven flue gas cooling system；The coke oven heating system includes combustion-supporting gas
Feed unit, fuel gas supply unit, combustion chamber and regenerative chamber, the combustion-supporting gas feed unit, which is set, helps fuel gas inlet connection pure oxygen defeated
Pipeline is sent, the fuel gas supply unit sets fuel gas inlet connection coke-stove gas conveyance conduit；The coke oven heating system and coal are high
Warm distillation system is disposed adjacent, between the carbonization chamber in the combustion chamber in coke oven heating system and High T-emperature Carbonization system be equipped with every
Wall, the combustion chamber of several alternate arrangements and carbonization chamber collectively constitute coke oven battery；The High T-emperature Carbonization system sets gas exit
Coal gas collection, which is sequentially connected, by gas piping mentions hydrogen system with purification system, coal gas；The coke oven heating system sets flue gas and goes out
Mouth is sequentially connected coke oven flue gas pretreatment system, coke oven flue gas cooling system by flue, and coke oven flue gas cooling system is set
Condensation-water drain and CO2Exhanst gas outlet, CO2Exhanst gas outlet passes through CO2Carbonization chamber in smoke conveying duct and High T-emperature Carbonization system
On CO2Smoke inlet is connected；Coal gas mentions hydrogen system and sets product hydrogen outlet and coke-stove gas outlet, coke-stove gas outlet connection
Coke-stove gas conveyance conduit.
Compared with prior art, the beneficial effects of the present invention are:
1) clean energy resource is produced；
H is rich in the coke-stove gas that coal is generated through high-temperature retorting2, and H2As clean energy resource use increasingly by
To the concern of all circles, H2Preparation have become hydrogen energy source using the impassable premise of industry.Coking production is provided to coal
The Efficient Conversion in source and utilization, while producing raw coke necessary to steel industry, to the hydrogen gas in coke oven gas of by-product
Extraction will be greatly reduced hydrogen energy source utilize industry hydrogen preparation cost, become the important hydrogen source of hydrogen energy source industry.Therefore, it adopts
Hydrogen in coke-stove gas is extracted with technique of the present invention, the road of coking industry development can be widened, tamps coal tar
The foundation of change industry.
2) the source emission reduction of NOx is realized；
The present invention reduces the generation for even avoiding NOx by using pure oxygen burning, will realize from the source that coking produces
The emission reduction of pollutant.Simultaneously as existing coke oven heating system is not used to make combustion-supporting gas using air, give up after avoiding burning
The presence of a large amount of N2, not only significantly reduces the volume of coke oven flue gas, more avoids carrying around the outlet of amount of heat exhaust gas in gas
Caused by effective energy lose, so that the efficiency of energy utilization of coke oven heating system is significantly improved, realized from source
Energy conservation.
3) high heating value combustion gas is produced；
By purified coke-stove gas after mentioning hydrogen, the calorific value of remaining coke-stove gas improves nearly 60%, either
The heating of coke oven itself, or as the combustion gas of other purposes, can all significantly improve efficiency of combustion and efficiency of energy utilization.Calorific value
Improve also die-offing along with combustion gas volume simultaneously so that pipeline used in fuel gas transmission is reduced, combustion gas of being more convenient for
Conveying.
4) CO is realized2Emission reduction and resource utilization；
Because the present invention uses pure oxygen burning, the main component for the coke oven flue gas that coke oven heating system generates is CO2And H2O, two
Person accounts for nearly the 96% of coke oven flue gas total amount.By coke oven flue gas cooling system, by the H in flue gas2O is cooled to condensed water and gives
It recycles, valuable water resource can be saved.And CO2It is admitted to carbonization chamber, react with coal tar material generation at high temperature
CO is again converted into the available energy, not only coke oven flue gas is made to realize zero-emission, and the calorific value of coke-stove gas is also improved,
There is positive promote meaning to efficient utilize of environmental protection and the energy.
5) process of coking efficiency of energy utilization is improved；
By in regenerative chamber be arranged have enough heat storage capacities heat storage, by coke oven flue gas temperature be down to 300 DEG C or
150 DEG C hereinafter, the energy that coke oven heating system fuel gas buring discharges to be sufficiently used for the destructive distillation of coal charge in carbonization chamber with this, are reduced
The energy that outer waste air carries reduces coking process total energy consumption to improve the utilization efficiency of the process of coking energy.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of clean coking system of the present invention.
Fig. 2 is the composition schematic diagram of coke oven heating system of the present invention.
In figure: 1. coke oven heating system, 11. 13. combustion chamber of combustion-supporting 12. fuel gas supply unit of gas feed unit, 14. regenerative chamber
2. 3. coal gas of High T-emperature Carbonization system, which is collected, mentions 5. coke oven flue gas pretreatment system of hydrogen system, 6. coke oven with 4. coal gas of purification system
Flue-gas-cooling system
Specific embodiment
Specific embodiments of the present invention will be further explained with reference to the accompanying drawing:
A kind of clean coking process of the present invention, includes the following steps:
1) in the combustion chamber of coke oven heating system 1 13, oxygen and coke-stove gas full combustion simultaneously discharge heat, to coal height
Indoor coal charge, which is carbonized, in warm distillation system 2 carries out heating destructive distillation；
2) the coke oven flue gas main component that coke oven heating system 1 generates after burning is CO2、H2O and a small amount of SO2, coke oven
Flue gas enters coke oven flue gas pretreatment system 5；In coke oven flue gas pretreatment system, more than coke oven flue gas progress desulfurization and recycling
Heat；
3) coke oven flue gas after pretreatment enters coke oven flue gas cooling system 6；In coke oven flue gas cooling system 6, cigarette
Vapor in gas is condensed into as liquid condensation water, and is recycled by condensation water recovery system；
4) removing the main component of the coke oven flue gas after vapor is CO2, it is CO by main component2Coke oven flue gas send to
In the carbonization chamber of High T-emperature Carbonization system 2；In carbonization chamber, CO2It contacts and chemically reacts with high temperature coal tar material, CO2Turned
Turn to CO, and with the coke-stove gas generated in carbonization chamber by tedge be discharged into coal gas collect with purification system 3, to realize
CO2Resourcable transformation；
5) enter coal gas and collect the coke-stove gas with purification system 3 after cooling, purification, remove impurity therein, obtain
Corresponding tar, ammonium hydroxide, benzene-type products and byproduct, purified coke-stove gas enter coal gas and mention hydrogen system 4；
6) it is mentioned in hydrogen system 4 in coal gas, the Hydrogen Separation in coke-stove gas is come out and is used as product hydrogen, the coke after mentioning hydrogen
Producer gas is returned in coke oven heating system 1 and is used as combustion gas as product coal gas, a portion coke-stove gas.
In the coke oven heating system 1, combustion-supporting gas uses pure oxygen, purified, mention and containing in the coke-stove gas after hydrogen
CH4, CO and other hydrocarbons.
The coke oven flue gas that the coke oven heating system 1 generates is after regenerative chamber 14, bottom flue, dividing flue and main chimney flue to collect
Into coke oven flue gas pretreatment system 5.
Heat storage is set in the regenerative chamber 14, is cooled to after the coke oven flue gas of regenerative chamber 14 and heat storage heat exchange
300 DEG C hereinafter, coke oven flue gas after cooling enters back into coke oven flue gas pretreatment system 5；The coke oven flue gas pretreatment system 5 wraps
Flue gas desulphurization system and flue gas waste heat recovery system are included, flue gas desulphurization system removes the SO in coke oven flue gas2, flue gas waste heat recovery
System recycles the waste heat of coke oven flue gas.
Heat storage is set in the regenerative chamber 14, it can also be cold after the coke oven flue gas of regenerative chamber 14 and heat storage heat exchange
But to 150 DEG C hereinafter, coke oven flue gas after cooling enters back into coke oven flue gas pretreatment system 5；Coke oven flue gas pretreatment system
System 5 includes flue gas desulphurization system and flue gas waste heat recovery system, and coke oven flue gas first passes through flue gas waste heat recovery system to coke oven cigarette
The waste heat of gas is recycled, and flue gas desulphurization system removing SO is entered back into2, the flue gas desulphurization system is using active coke desulphurizing system
System.
As shown in Figure 1, a kind of clean coking system of the present invention, including coke oven heating system 1, High T-emperature Carbonization system
2, coal gas, which is collected, mentions hydrogen system 4, coke oven flue gas pretreatment system 5 and coke oven flue gas cooling system 6 with purification system 3, coal gas；Such as
Shown in Fig. 2, the coke oven heating system 1 includes combustion-supporting gas feed unit 11, fuel gas supply unit 12, combustion chamber 13 and regenerative chamber
14, the combustion-supporting gas feed unit 11, which is set, helps fuel gas inlet to connect pure oxygen conveyance conduit, and the fuel gas supply unit 12 sets combustion gas
Entrance connects coke-stove gas conveyance conduit；The coke oven heating system 1 is disposed adjacent with High T-emperature Carbonization system 2, coke oven heating
Partition wall, the combustion chamber of several alternate arrangements are equipped between carbonization chamber in combustion chamber 13 in system 1 and High T-emperature Carbonization system 2
13 collectively constitute coke oven battery with carbonization chamber；The High T-emperature Carbonization system 2 sets gas exit and is sequentially connected by gas piping
Coal gas, which is collected, mentions hydrogen system 4 with purification system 3, coal gas；The coke oven heating system 1 sets exhanst gas outlet and passes through flue successively
Coke oven flue gas pretreatment system 5, coke oven flue gas cooling system 6 are connected, coke oven flue gas cooling system 6 sets condensation-water drain and CO2
Exhanst gas outlet, CO2Exhanst gas outlet passes through CO2CO in smoke conveying duct and High T-emperature Carbonization system 2 on carbonization chamber2Flue gas enters
Mouth is connected；Coal gas mentions hydrogen system 4 and sets product hydrogen outlet and coke-stove gas outlet, coke-stove gas outlet connection coke-stove gas conveying
Pipeline.
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 clean coking process, which comprises the steps of:
1) in the combustion chamber of coke oven heating system, oxygen and coke-stove gas full combustion simultaneously discharge heat, to High T-emperature Carbonization
Indoor coal charge is carbonized in system carries out heating destructive distillation；
2) the coke oven flue gas main component generated after coke oven heating system burning is CO2、H2O and a small amount of SO2, coke oven flue gas
Into coke oven flue gas pretreatment system；In coke oven flue gas pretreatment system, desulfurization and recovery waste heat are carried out to coke oven flue gas；
3) coke oven flue gas after pretreatment enters coke oven flue gas cooling system；In coke oven flue gas cooling system, in flue gas
Vapor is condensed into as liquid condensation water, and is recycled by condensation water recovery system；
4) removing the main component of the coke oven flue gas after vapor is CO2, it is CO by main component2Coke oven flue gas send to coal height
In the carbonization chamber of warm distillation system；In carbonization chamber, CO2It contacts and chemically reacts with high temperature coal tar material, CO2It is converted into
CO, and with the coke-stove gas generated in carbonization chamber by tedge be discharged into coal gas collect and purification system, to realize CO2's
Resourcable transformation；
5) enter coal gas and collect the coke-stove gas with purification system after cooling, purification, remove impurity therein, obtain corresponding
Tar, ammonium hydroxide, benzene-type products and byproduct, purified coke-stove gas enter coal gas and mention hydrogen system；
6) it is mentioned in hydrogen system in coal gas, the Hydrogen Separation in coke-stove gas is come out and is used as product hydrogen, the coke-oven coal after mentioning hydrogen
Gas is returned in coke oven heating system and is used as combustion gas as product coal gas, a portion coke-stove gas.
2. a kind of clean coking process according to claim 1, which is characterized in that combustion-supporting in the coke oven heating system
Gas uses pure oxygen, purified, mention in the coke-stove gas after hydrogen and contain CH4, CO and other hydrocarbons.
3. a kind of clean coking process according to claim 1, which is characterized in that the coke that the coke oven heating system generates
Kiln gas through regenerative chamber, bottom flue, divide flue and main chimney flue to collect after enter coke oven flue gas pretreatment system.
4. a kind of clean coking process according to claim 3, which is characterized in that set heat storage in the regenerative chamber, pass through
The coke oven flue gas and heat storage for crossing regenerative chamber are cooled to 300 DEG C hereinafter, coke oven flue gas after cooling enters back into coke oven after exchanging heat
Flue gas pretreatment system；The coke oven flue gas pretreatment system includes flue gas desulphurization system and flue gas waste heat recovery system, flue gas
Desulphurization system removes the SO in coke oven flue gas2, flue gas waste heat recovery system recycles the waste heat of coke oven flue gas.
5. a kind of clean coking process according to claim 3, which is characterized in that set heat storage in the regenerative chamber, pass through
Cross regenerative chamber coke oven flue gas and heat storage heat exchange after can also be cooled to 150 DEG C hereinafter, coke oven flue gas after cooling again into
Enter coke oven flue gas pretreatment system；The coke oven flue gas pretreatment system includes flue gas desulphurization system and flue gas waste heat recovery system
System, coke oven flue gas first pass through flue gas waste heat recovery system and recycle to the waste heat of coke oven flue gas, enter back into flue gas desulphurization system
Remove SO2, the flue gas desulphurization system is using active coke desulphurizing system.
6. a kind of clean coking system for realizing any one technique described in claim 1-5, which is characterized in that including coke
Stove heating system, High T-emperature Carbonization system, coal gas, which are collected, mentions hydrogen system, coke oven flue gas pretreatment system with purification system, coal gas
And coke oven flue gas cooling system；The coke oven heating system includes combustion-supporting gas feed unit, fuel gas supply unit, combustion chamber and storage
Hot cell, the combustion-supporting gas feed unit, which is set, helps fuel gas inlet to connect pure oxygen conveyance conduit, and the fuel gas supply unit sets combustion gas and enters
Mouth connection coke-stove gas conveyance conduit；The coke oven heating system is disposed adjacent with High T-emperature Carbonization system, coke oven heating system
In combustion chamber and High T-emperature Carbonization system in carbonization chamber between be equipped with partition wall, the combustion chamber of several alternate arrangements and carbonization chamber
Collectively constitute coke oven battery；The High T-emperature Carbonization system set gas exit by gas piping be sequentially connected coal gas collect with it is net
Change system, coal gas mention hydrogen system；The coke oven heating system sets exhanst gas outlet, and by flue to be sequentially connected coke oven flue gas pre-
Processing system, coke oven flue gas cooling system, coke oven flue gas cooling system set condensation-water drain and CO2Exhanst gas outlet, CO2Flue gas goes out
Mouth passes through CO2CO in smoke conveying duct and High T-emperature Carbonization system on carbonization chamber2Smoke inlet is connected；Coal gas mentions hydrogen system
If product hydrogen outlet and coke-stove gas outlet, coke-stove gas outlet connection coke-stove gas conveyance conduit.
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| CN113444551A (en) * | 2021-06-29 | 2021-09-28 | 鞍钢股份有限公司 | Method for preparing combustible gas by using dry quenching primary dedusting ash |
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| CN110452724B (en) | 2024-03-19 |
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