CN106520148A - Water gas preparing system based on dry method coke quenching - Google Patents
Water gas preparing system based on dry method coke quenching Download PDFInfo
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- CN106520148A CN106520148A CN201610957402.XA CN201610957402A CN106520148A CN 106520148 A CN106520148 A CN 106520148A CN 201610957402 A CN201610957402 A CN 201610957402A CN 106520148 A CN106520148 A CN 106520148A
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- Prior art keywords
- gas
- coke
- dry
- dry quenching
- system based
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Classifications
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- 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
- C10B39/00—Cooling or quenching coke
- C10B39/02—Dry cooling outside the oven
-
- 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
-
- 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
- C10B57/005—After-treatment of coke, e.g. calcination desulfurization
-
- 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
- C10B57/08—Non-mechanical pretreatment of the charge, e.g. desulfurization
- C10B57/10—Drying
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/46—Gasification of granular or pulverulent flues in suspension
- C10J3/54—Gasification of granular or pulverulent fuels by the Winkler technique, i.e. by fluidisation
- C10J3/56—Apparatus; Plants
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/72—Other features
- C10J3/82—Gas withdrawal means
- C10J3/84—Gas withdrawal means with means for removing dust or tar from the gas
-
- 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
Abstract
The invention discloses a water gas preparing system based on dry method coke quenching. The water gas preparing system comprises a crusher, a fluidized bed, a coke oven and a dry quenching oven, all of which are sequentially connected. A dry quenching oven circulation gas outlet is connected with a dry medium inlet of the fluidized bed through a waste heat boiler and a circulation draught fan. A dry medium outlet of the fluidized bed is connected with a dry quenching oven circulation gas inlet through a settling chamber or a cyclone dust remover. A circulation pipeline from a circulation gas outlet of the settling chamber or the cyclone dust remover to the dry quenching oven circulation gas inlet is provided with a gas guiding-out port connected with a gas purifying system. The system is simple, running is reliable, low-temperature waste heat and byproduct gas can be effectively recycled, coking coal is effectively dried, the service life of equipment is prolonged, meanwhile, smoke discharge is greatly reduced, and the system is friendly to the environment.
Description
Technical field
The present invention relates to a kind of coal chemical technology, specifically a kind of water gas preparation system based on CDQ.
Background technology
CDQ originates from Switzerland, and through the Development Technology relative maturity of over half a century, reliable, equipment is got over
More to maximize.It is developed so far, although occur in that different forms, but its typical process flow is similar, be using lazy
Property gas by a kind of coke quenching method of red burnt cooling：Red Jiao loads from the top of coke dry quenching furnace, and cryogenic inert gas are roused by circulating fan
Entering coke dry quenching furnace and cooling down red Jiao, the coke after cooling is that is, dry cold Jiao (300 DEG C of ＜) to be put out from the discharge of coke dry quenching furnace bottom, absorbs sensible heat
High temperature inert gas Jing one-time dedusting removes coarse granule coke breeze and carries out heat exchange into waste heat boiler, and boiler produces steam to be used to send out
Electricity.Noble gases Jing final dustings after cooling remove fine grained coke breeze, then are pressurizeed by circulating fan, the cooling of Jing feed water preheaters
To after about 130 DEG C, coke dry quenching furnace is blasted again by circulating fan, noble gases are used in closed system interior circulation.
The main process has following all various problems：
(1) coke temperature that environmental system is discharged is damaged into environment containing about 0.2GJ/t- burnt sensible heat more than 150 DEG C
Lose, not only focusing process system belt produces thermal etching, goes back the working environment of the burnt processing region of severe exacerbation；
(2) gas-circulating system negative pressure section can leak into a small amount of air, O2Will be generated with coke gasification reaction by red focus layer
CO2, CO2CO can be reduced into again in coke layer high-temperature region, and with increasing for cycle-index, in recyclegas, CO concentration is more and more high.
Additionally, coke remaining fugitive constituent is being separated out all the time, the pyrogenous origin H of coke2、CO、CH4Deng being all also inflammable and explosive composition.These
It is outer after flammable group of burning to arrange, it is both the waste of the energy, or the source of pollution；
(3) leakage of waste heat boiler, causes the moisture increase in recyclegas, the water that steam is generated in coke layer high-temperature region
It is outer after gas-fired to arrange, cause energy waste；
(4) the burnt dust content of furnace roof dress is big, temperature is high, and the sensible heat that flue dust is carried fails effective recycling.
On the other hand, enter in stove coking coal containing 10% or so moisture, in carbonization chamber process of coking, the moisture is most
Coke oven is left with raw coke oven gas form eventually, heat energy about 0.585GJ/t- coals are consumed.For reducing energy consumption, reduce coking chemical waste water and produce,
Many coal conditioning techniques are developed, used Precarbon methods, Simcar methods, Coaltek methods etc. are adopted by such as foreign countries.Domestic minority
Coke-oven plant using coal humidifying technology (CMC) by moisture Control between 6～8%, it is coal charge in this moisture model which selects reason
Dust emission in enclosing is controllable, and the heat of coke oven exhaust gas is only capable of being dried to numerical value here.The as-fired coal of most coke-oven plants
Moisture relies primarily on the moisture controlled into factory's feed coal, and forms relatively stable cooperation moisture content of coal through coal yard heap volume blending and enter
Row enters stove coking, and the means of moisture are not almost controlled in actual mechanical process.
In order to reduce the pretreatment cost into stove coking coal, make full use of more than the unemployed waste heat in CDQ
Can, effective utilization ways need to be sought.
The content of the invention
The invention aims to solve above-mentioned technical problem, there is provided a kind of simple system, it is reliable, effectively can return
Receive low temperature exhaust heat, by-product gas, to coking coal efficient drying, extension device service life and soot emissions are greatly decreased, to ring
The friendly water gas preparation system based on CDQ in border.
Present system includes disintegrating machine, fluid bed, coke oven and the coke dry quenching furnace being sequentially connected, the coke dry quenching furnace circulating gas
The dried medium entrance connection of outlet Jing waste heat boilers, circulating fan and fluid bed, the dried medium outlet Jing sedimentations of fluid bed
Room or cyclone dust extractor are connected with the circulating gas entrance of coke dry quenching furnace；The circulating gas outlet of the expansion chamber or cyclone dust extractor
The coal gas outlet being connected with gas cleaning system is provided with to coke dry quenching furnace circulating gas entrance pipeloop..
The feeding mouth of the disintegrating machine is connected with festoon drier discharging opening.
The dust outlet of the expansion chamber or cyclone dust extractor is connected with pressure ball system or with blast furnace blowing coal-hole.
Disappear dress Jiao's flue dust dust collection pipes of detonation burner and coke dry quenching furnace of the dried medium entrance Jing of the festoon drier connect
Connect.
The dried medium entrance of the festoon drier is connected with the coke oven flue gas outlet of coke oven horizontal flue.
Inventor makees the deficiency that hot complementary energy fails effective recycling to the low temperature that existing dry quenching system is present, and is not changing
On the premise of becoming existing dry coke quenching main process, following improvement has been made：(1) original circulation inertia is substituted using circulating gas
Quenching medium of the gas as dry quenching system, while have also been changed former circulation route, goes out the circulating gas pair of dry quenching system
Coking coal after broken is dried, and makes the waste heat in circulating gas obtain efficient recovery, and loopback enters the circulation of dry quenching system
The temperature of coal gas can be down to 100 DEG C -110 DEG C, and so as to reduce further the tapping temperature of cold Jiao, tapping temperature can be down to 150
Below DEG C, the cold burnt hot injury to the burnt belt of fortune is reduced, service life of equipment is extended.(2) circulating gas send into fluid bed
Coking coal after to crushing is dried, and can improve drying efficiency and efficiency, and the ash-laden gas removing dust Posterior circle of generation enters
Exchange heat in entering dry quenching system, there is no the pollution problem of outer smoke evacuation dirt after fluid bed, the discharge for thoroughly solving PM2.5 is asked
Topic, it is environmentally friendly；(3) although various reactions cause the CO (H for also containing in there is the dry quenching system described in background technology2、
CO、CH4Deng) problem accumulated, due to inventor it is creative quenching medium has been changed to into circulating gas by circulated inert gas,
This technical problem becomes beneficial technique effect just；Additionally, due to the circulation route for changing circulating gas, coal is circulated
When gas is dried in fluid bed, the moisture content in coking coal can be absorbed, these steam directly enter dry quenching system with circulating gas
React to form water gas with red Jiao afterwards, so that circulating gas amount is on the basis of circulation route demand is met, moreover it is possible to
Surplus gas are produced, additional economic benefit is generated, heat energy, non-exhaust emission, energy-conservation drop are fully reclaimed in whole cyclic process
Consumption, it is environmentally friendly.Also, the course of reaction of above-mentioned water gas is an endothermic process, is also beneficial to quickly putting out for coke dry quenching furnace
It is burnt.(4) in order to the water content of effective control coal is down to less than 3%, inventor is by controlling out the circulating gas of waste heat boiler
Temperature, is conducive to improving the dry tenacity of fluid bed, makes the water content that coking coal goes out in fluid bed be down to less than 3%, even more
It is low.(5), when the water in circulating gas enters dry quenching system, can react with coke, according to gas-solid reaction mechanism, coke
The fine coke breeze on surface can preferentially occur water gas reaction, i.e., preferentially consume the fine dusts on coke surface, so as to improve Jiao
Carbonaceous amount, reduces fine powder coke content, improves product quality.
Further, fill for furnace roof that burnt flue dust dustiness is big, temperature is high, the sensible heat that flue dust is carried fails efficient recovery profit
Problem, inventor by this part flue dust Jing sending into after the burnt dirt of quick-fried burner combustion oxygen depleted and part that disappears, and from
The coke oven flue gas of coke oven horizontal flue send into festoon drier together as dried medium so that the waste heat of this part of flue dust is obtained
To effective recycling.
Present system is simple, reduces out the cold burnt temperature of dry quenching system, reclaims cold burnt sensible heat about 0.1GJ/t- more
Jiao, also accordingly slow down the cold burnt thermal etching to travelling belt, along the life-span for having grown belt；Creative has used circulating gas
Original noble gases are replaced, the discharge of PM2.5 is reduced, the burnt waste heats above of 0.4GJ/t- is further reclaimed, while going back by-product
Coal gas, improves coke quality；The drying effect and efficiency of coking coal are improve, coal water content is down to less than 3%, is dried heat energy
It is from system hypothermia waste heat, further energy-saving.
Description of the drawings
Fig. 1 is present system figure.
Wherein, 1- festoon driers, 2- disintegrating machines, 3- fluid beds, 4- expansion chambers or cyclone dust extractor, 5- blast furnace blowings storehouse
Or pressure ball system, 6- coke dry quenching furnaces, 7- waste heat boilers, 8- disappear detonation burner, 9- coke ovens, 10- cleaner units, 11- coal gas outlets,
12- circulating fans.
Specific embodiment
Explanation is further explained to present system below in conjunction with the accompanying drawings：
Referring to Fig. 1, the present invention includes the festoon drier 1 being sequentially connected, disintegrating machine 2, fluid bed 3, coke oven 9 and dry puts out
Stove 6, the circulating gas outlet Jing waste heat boilers 7 and circulating fan 12 of the coke dry quenching furnace 6 are connected with the dried medium entrance of fluid bed 3
Connect, the dried medium outlet Jing expansion chambers of fluid bed 3 or cyclone dust extractor 4 are connected with the circulating gas entrance of coke dry quenching furnace 6, described
The fine coal outlet of expansion chamber or cyclone dust extractor 4 is connected with pressure ball system or blast furnace blowing coal-hole 5；The expansion chamber or whirlwind are removed
The circulating gas of dirt device 4 are exported to the pipeloop of 6 circulating gas entrance of coke dry quenching furnace and are provided with what is be connected with gas cleaning system
Coal gas outlet 11.The dried medium entrance Jing of the festoon drier 1 disappears the dress Jiao's cigarette at the top of detonation burner 8 and coke dry quenching furnace 6
Dirt dust collection pipe connects.Coke oven flue gas outlet of the dried medium entrance of the festoon drier 1 also with coke oven horizontal flue
Connection (not shown).The exhanst gas outlet of the festoon drier 1 and disintegrating machine 2 is connected with cleaner unit 10.
Technical process explanation：Coking coal (water content is 10wt%) is first by from the horizontal cigarette of coke oven in festoon drier 1
The coke oven flue gas in road are dried, and water content drops to 7-8wt%, and then Jing disintegrating machines 2 are crushed to below 3mm, refine after crushing
Coking coal carries out fluidizing in sending into fluid bed 3, is dried, is classified, and below circulating gas drying to water content 3wt%, and is classified
To rough coal grain (particle diameter is 0.3-3mm) and fine breeze (particle diameter ＜ 0.3mm), after rough coal grain feeding 9 coking of coke oven, obtain red
Jiao, it is red it is burnt send into coke dry quenching furnace 6 cold burnt less than 150 DEG C of temperature obtained after circulating gas quenching discharge；Go out dry quenching system 6
Circulating gas (900 DEG C of temperature) go out the circulating gas (temperature 180-230 DEG C) of waste heat boiler 7 into 7 byproduct steam of waste heat boiler
Coking coal fluidisation after fluid bed 3 pairs is crushed is sent into, is dried, is classified Jing circulating fan 12, the circulating gas for going out fluid bed 3 contain greatly
Amount fine breeze (particle diameter ＜ 0.3mm), Jing after 4 dedusting of expansion chamber or cyclone dust extractor, most of loopback coke dry quenching furnace 6 is carried out to red Jiao
Quenching, fraction Jing coal gas outlet 11 are drawn and send into coal gas dust removal cleaning system as by-product gas；Jing expansion chambers or whirlwind
The fine coal that dust settler 4 is isolated sends into pressure ball system or blast furnace blowing coal-hole 5.Gathered dust by burnt flue dust is filled at the top of the coke dry quenching furnace 6
The burnt flue dust of dress that pipeline is drawn is Jing after the burnt dirt of the burning oxygen depleted of detonation burner 8 and part that disappears and from coke oven horizontal flue
Coke oven flue gas send into festoon drier 1 together as dried medium.Flue gas from the festoon drier 1 and disintegrating machine 2 send
Enter qualified discharge after 11 dedusting of cleaner unit.
By taking the 6m coke ovens production for producing burnt 1,100,000 tons of burnt 2,55 hole per year as an example, using the present invention after, add up to recovery waste heat
More than 0.4GJ/t- is burnt, by-product gas 10000m3It is more than/hour；Before coking coal enters coke oven, water content is down to less than 3%, subtracts
Few more than 70% coking chemical waste water yield.
Claims (5)
1. a kind of water gas preparation system based on CDQ, including the disintegrating machine, fluid bed, coke oven being sequentially connected and dry puts out
Stove, it is characterised in that the dried medium entrance of the coke dry quenching furnace circulating gas outlet Jing waste heat boilers, circulating fan and fluid bed
Connection, the dried medium outlet Jing expansion chambers of fluid bed or cyclone dust extractor are connected with the circulating gas entrance of coke dry quenching furnace；It is described
The circulating gas of expansion chamber or cyclone dust extractor are exported to coke dry quenching furnace circulating gas entrance pipeloop and are provided with and gas purification
The coal gas outlet of system connection.
2. the water gas preparation system based on CDQ as claimed in claim 1, it is characterised in that the disintegrating machine enters
Material mouth is connected with festoon drier discharging opening.
3. the water gas preparation system based on CDQ as claimed in claim 1 or 2, it is characterised in that the expansion chamber
Or the dust outlet of cyclone dust extractor is connected with pressure ball system or with blast furnace blowing coal-hole.
4. the water gas preparation system based on CDQ as claimed in claim 1, it is characterised in that the festoon drier
Disappear dress Jiao's flue dust dust collection pipes of detonation burner and coke dry quenching furnace of dried medium entrance Jing be connected.
5. the water gas preparation system based on CDQ as described in claim 1 or 4, it is characterised in that the annular is dry
The dried medium entrance of dry machine is connected with the coke oven flue gas outlet of coke oven horizontal flue.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610957402.XA CN106520148B (en) | 2016-10-27 | 2016-10-27 | Water-gas preparation system based on Dry Quenching |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610957402.XA CN106520148B (en) | 2016-10-27 | 2016-10-27 | Water-gas preparation system based on Dry Quenching |
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| CN106520148A true CN106520148A (en) | 2017-03-22 |
| CN106520148B CN106520148B (en) | 2019-03-15 |
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| CN201610957402.XA Active CN106520148B (en) | 2016-10-27 | 2016-10-27 | Water-gas preparation system based on Dry Quenching |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110813006A (en) * | 2019-12-02 | 2020-02-21 | 中冶焦耐(大连)工程技术有限公司 | Waste gas waste heat recovery and purification process of coke oven gas heating system |
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| JPS6232174A (en) * | 1985-08-05 | 1987-02-12 | Nippon Steel Corp | Coke dry quenching equipment |
| CN2232039Y (en) * | 1995-12-11 | 1996-07-31 | 康成 | Vertical continuous coke furnace |
| CN102433142A (en) * | 2011-10-21 | 2012-05-02 | 山东天力干燥股份有限公司 | Quality-improving technique combining low-rank coal pneumatic drying with multi-tube revolving destructive distillation and system for same |
| CN103965922A (en) * | 2013-01-31 | 2014-08-06 | 神华集团有限责任公司 | Semi-coke dry quenching method, semi-coke product and coal pyrolysis system |
| CN105907413A (en) * | 2016-05-04 | 2016-08-31 | 无锡亿恩科技股份有限公司 | Low-temperature carbonization process for low-order pulverized coal |
-
2016
- 2016-10-27 CN CN201610957402.XA patent/CN106520148B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6232174A (en) * | 1985-08-05 | 1987-02-12 | Nippon Steel Corp | Coke dry quenching equipment |
| CN2232039Y (en) * | 1995-12-11 | 1996-07-31 | 康成 | Vertical continuous coke furnace |
| CN102433142A (en) * | 2011-10-21 | 2012-05-02 | 山东天力干燥股份有限公司 | Quality-improving technique combining low-rank coal pneumatic drying with multi-tube revolving destructive distillation and system for same |
| CN103965922A (en) * | 2013-01-31 | 2014-08-06 | 神华集团有限责任公司 | Semi-coke dry quenching method, semi-coke product and coal pyrolysis system |
| CN105907413A (en) * | 2016-05-04 | 2016-08-31 | 无锡亿恩科技股份有限公司 | Low-temperature carbonization process for low-order pulverized coal |
Non-Patent Citations (1)
| Title |
|---|
| 李哲浩: "《炼焦新技术》", 30 April 1988, 冶金工业出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110813006A (en) * | 2019-12-02 | 2020-02-21 | 中冶焦耐(大连)工程技术有限公司 | Waste gas waste heat recovery and purification process of coke oven gas heating system |
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| CN106520148B (en) | 2019-03-15 |
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