CN205710622U - A kind of coal water slurry gasification coal gas waste heat recycling system - Google Patents
A kind of coal water slurry gasification coal gas waste heat recycling system Download PDFInfo
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- CN205710622U CN205710622U CN201620349465.2U CN201620349465U CN205710622U CN 205710622 U CN205710622 U CN 205710622U CN 201620349465 U CN201620349465 U CN 201620349465U CN 205710622 U CN205710622 U CN 205710622U
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- waste heat
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- 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
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- 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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Abstract
This utility model provides a kind of coal water slurry gasification coal gas waste heat recycling system.Coal water slurry gasification coal gas waste heat recycling system of the present utility model includes: coal slurry gasifier (3), fluidized gasification device (4), gas heat exchanger (5) and fluidized bed pyrolyzer (6)；The gas exit of described coal slurry gasifier (3) is connected with the gas feed of described fluidized gasification device (4)；The gas outlet of described fluidized gasification device (4) is connected with the gas inlet of described gas heat exchanger (5)；The nitrogen outlet of described gas heat exchanger (5) is connected with the gas feed of described fluidized bed pyrolyzer (6).The coal gas heat recovery based on fluidized gasification of this utility model offer and the system of purification, combine the technical advantage of fluidized gasification, and total system equipment is simple, it is easy to operation, and the thermal efficiency is high, pollution-free.
Description
Technical field
This utility model belongs to chemical technology field, is specifically related to coal water slurry gasification coal gas waste heat recovery profit
Use system.
Background technology
Coal water slurry entrained flow bed gasification, makes water-coal-slurry by feed coal, under the rolling action of gasifying agent,
Both also flow contact, and coal charge is gentle with gasifying agent generation combustion reaction higher than at a temperature of its ash fusion point
Change reaction.The reaction temperature of entrained flow gasification is high compared with fixed bed gasification and fluidized gasification, reaction
Speed is fast, and the coal charge time of staying is short, and product does not contains the material such as tar, methane.The master of coal water slurry gasification
Wanting feature is that gasification temperature is high, intensity is big, coal adaptability is relatively strong, gasification index is good.
Owing to water-coal-slurry concentration in gasifying medium is low, reactant flowing, product gas and fuel it
Between can not carry out internal heat, what its result was Outlet Gas Temperature than moving bed and fluid bed is the highest,
In order to ensure the higher thermal efficiency, typically heat exchange area is set on follow-up heat reclaim unit bigger
Heat transmission equipment.At high temperature react, the gas sensible heat that there is gasification furnace is high, cold gas efficiency is low,
The shortcomings such as consumption of raw materials is high.Coal water slurry gasification process vaporizer outlet temperature typically more than 1300 DEG C,
And due to coal water slurry gasification, containing substantial amounts of H in the coal gas of gasification furnace outlet2O and CO2,
For the technique of coal water slurry gasification preparing synthetic gas, rationally reclaim synthesis gas high temperature sensible heat be one the heaviest
The engineering problem wanted.
The cooling of the coal gas of coal water slurry gasification generation at present mainly has two kinds of methods: one is gasification gas Quench
Technique, two, coal gas through waste heat boiler heat exchange produce steam.
Chinese patent CN 204,569,850 U discloses the coal slurry gasifier technology with double chilling ring
Scheme.In this patent, coal slurry gasifier includes combustor vaporizer, shock chamber's outer wall, the first Quench
Ring, the second chilling ring, vapor riser, gas down-comer etc..The cooling water that first chilling ring flows out
Flow down along gas down-comer, tube wall is formed the most thinning moisture film, the second chilling ring
The current flowed out can supplement moisture film in centre position, makes the moisture film bottom gas down-comer can reach foot
Enough thickness, effective protective gas down-comer, and the high-temperature gas produced effectively is lowered the temperature.
The shortcoming of this technology is that efficiency is low and itself is the most energy-conservation and causes the waste of the energy, due to washings
It is directly to contact generation wash water and difficult treatment with coal gas, brings serious problem of environmental pollution.
203079923 No. U water coal slurry pressure gasifications disclosing water-cooling wall pot destroying process of Chinese patent CN
Technical scheme.This utility model Coal-water Slurry Pressurized Gasification Unit, is burnt by gasification furnace combustor, gasification furnace
Mouth, radiation waste heat recovery boiler and convection current heat recovery boiler are constituted, and gasifier nozzle is separately positioned on
Gasification furnace top of combustion chamber, gasifier nozzle communicates with gasification furnace combustion chamber, coal slurry feed-line
Being connected with gasifier nozzle, gasification furnace combustor is connected with radiation waste heat recovery boiler directly below, spoke
Penetrating waste heat boiler top and be provided with gas outlet, convection current heat recovery boiler connects with gas outlet；Gas
The coal gas changing stove generation carries out coal gas waste heat recovery through convection current radiant boiler and radiation waste heat boiler.This
Low-pressure steam amount produced by individual technique is very big, but owing to pressure is the lowest, value is relatively low, coal gas
The utilization rate of waste heat is relatively low, and cold gas efficiency is the most relatively low so that Gas Production cost increases
Add, and easy slagging scorification on radiant boiler water-cooling wall, slag block up, cause gasifier operation abnormal, very
To stopping.
Utility model content
, problem not environmentally the most energy-conservation for prior art, the purpose of this utility model is to provide one
Plant energy-conservation, safe and environment-friendly coal water slurry gasification coal gas waste heat recycling system.
To achieve these goals, this utility model provides a kind of coal water slurry gasification coal gas waste heat recovery
Utilize system, including: coal slurry gasifier (3), fluidized gasification device (4), gas heat exchanger
(5) and fluidized bed pyrolyzer (6), the gas exit of described coal slurry gasifier (3) and described stream
The gas feed changing bed gasifying apparatus (4) connects；The gas of described fluidized gasification device (4) goes out
Mouth is connected with the gas inlet of described gas heat exchanger (5)；The nitrogen of described gas heat exchanger (5)
Outlet is connected with the gas feed of described fluidized bed pyrolyzer (6).
Further, described coal water slurry gasification coal gas waste heat recycling system also includes: coal pulverizer
(1), water-coal-slurry preparation facilities (2).Semicoke outlet and the described water-coal-slurry system of described coal pulverizer (1)
The semicoke import of standby device (2) connects；The outlet of described water-coal-slurry preparation facilities (2) and described water
The water-coal-slurry import of coal slurry gasification furnace (3) connects.
Further, described coal water slurry gasification coal gas waste heat recycling system also includes oil gas condensation
Device (7), the oil gas vent of described fluidized bed pyrolyzer (6) and described oil gas condensation device (7)
Connect.
Further, described coal water slurry gasification coal gas waste heat recycling system also includes: half coke bin
(8)；The import of described half coke bin (8) exports with the semicoke of described fluidized bed pyrolyzer (6) and is connected.
Further, in described coal water slurry gasification coal gas waste heat recycling system, described half coke bin
(8) semicoke outlet is connected with the semicoke import of described fluidized gasification device (4).
Further, in described coal water slurry gasification coal gas waste heat recycling system, described half coke bin
(8) semicoke outlet is connected with the import of described coal pulverizer (1).
Fluid bed gas is combined according to coal water slurry gasification coal gas waste heat recycling system of the present utility model
The technical advantage changed, total system equipment is simple, it is easy to operation, does not has dirt in coal gas cooling procedure
Water produces, and the thermal efficiency is high, pollution-free, has the effect of energy-conserving and environment-protective.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of this utility model device.
Detailed description of the invention
The technical problems to be solved in the utility model is to provide a kind of safe and reliable, coal gas waste heat recovery profit
High by rate, coolant gas efficiency high, by the heat recovery system of energy-conserving and environment-protective.Technology of the present utility model
Scheme is the feature according to coal water slurry entrained flow bed gasification, is first that temperature of exit gas is at 1200 DEG C
Between-1600 DEG C, then there is the H containing about 10%-20% in gasification furnace outlet raw gas2O and 10%-20%
CO2.Coal gas of high temperature is passed through in fluidized-bed gasification furnace and carries out gasification reaction with semicoke,
C+CO2=2CO；C+H2O=CO+H2.Above-mentioned two reaction is the endothermic reaction.By in fluidisation
The gasification reaction occurred in Chuan, had both reduced gas temperature, had improve again CO and H in coal gas2Contain
Amount.Coal gas through preliminary cooling carries out heat exchange with inert nitrogen gas, and high temperature nitrogen is as pyrolysis of coal
Pyrolysis gas use, pyrolysis produces the high value added product such as oil, coal gas, and semicoke is as water-coal-slurry raw material
Use with fluidized-bed gasification furnace charge raw material.Coal water slurry gasification coal gas waste heat chemical method obtains classification and fills
Divide and utilize.
Embodiment shown in below in conjunction with the accompanying drawings further illustrates structure of the present utility model.
Fig. 1 is a kind of coal gas heat recovery based on fluidized gasification of this utility model and purification
The principle schematic of system.In figure: 1, coal pulverizer, 2, water-coal-slurry preparation facilities, 3, water-coal-slurry
Gasification furnace, 4, fluidized gasification device, 5, gas heat exchanger, 6, fluidized bed pyrolyzer, 7, oil,
Gas condensing unit, 8, half coke bin.
As it is shown in figure 1, a kind of coal water slurry gasification coal gas waste heat recycling system bag of the present utility model
Include: coal pulverizer (1), water-coal-slurry preparation facilities (2), coal slurry gasifier (3), fluidized gasification
Device (4), gas heat exchanger (5), fluidized bed pyrolyzer (6), oil gas condensation device (7), half
Coke bin (8).Described coal slurry gasifier gas exit is connected with fluidized gasification device gas feed；
Described fluidized gasification device gas outlet is connected with gas heat exchanger gas inlet；Described gas converting heat
Device nitrogen outlet is connected with fluidized bed pyrolyzer gas feed；Described fluid bed oil gas vent is cold with oil gas
Solidifying device connects；The outlet of described fluidized bed pyrolysis device semicoke is connected with half coke bin import；Described semicoke
Storehouse outlet is connected with fluidized gasification device semicoke import；Described half coke bin semicoke outlet is entered with coal pulverizer
Mouth connects；The outlet of described coal pulverizer semicoke is connected with water-coal-slurry preparation facilities semicoke import.
The system shown in Fig. 1 is utilized to carry out gasification gas heat recovery and purify the concrete step of technique
Suddenly include:
(1) coal gas of high temperature produced by coal slurry gasifier 1200 DEG C-1600 DEG C enters fluidized gasification
In stove, containing about the CO of 10-20% in coal gas2H with 10%-20%2O, in coal gas high-temperature waste heat condition
H in lower coal gas2O and CO2C+CO is carried out with semicoke2=2CO；C+H2O=CO+H2Reaction.Synthesis
Gas effective ingredient CO, H2Content improves 4%-5%.
(2) after fluidized gasification device 4, gas temperature is reduced to 950 DEG C-1000 DEG C, coal gas
Being preheated by nitrogen through gas heat exchanger, now gas temperature is further decreased to 500 DEG C-600 DEG C.
(3) through the gas preheating nitrogen to 500 DEG C-600 DEG C of gas preheating, this nitrogen is as coal warm
The heat carrier solved is sent in fluidized bed pyrolyzer 6.
(4) pyrolysis produce gas mixture send into oil, gas condensing unit 7 condense, obtain oil,
The addition products such as coal gas.
(5), during pyrolysis char enters half coke bin 8, a part of semicoke is prepared raw material as water-coal-slurry and is sent into
Being ground in grinder 1, the coal dust after grinding makes water-coal-slurry with water.
In (6) half coke bins 8, a part of semicoke sends into fluidisation as the carbon source of reaction in fluidized-bed gasification furnace
In bed gasifying apparatus 4, generating gasification reaction in fluidized gasification device.
Embodiment
The coal gas of high temperature produced by coal slurry gasifier 1300 DEG C enters in fluidized-bed gasification furnace, in coal gas
CO containing about 15%2With 10% H2O, H in coal gas under the conditions of coal gas high-temperature waste heat2O and CO2
Carry out C+CO2=2CO；C+H2O=CO+H2Reaction.Synthesis gas finite element CO, H2Content carries
High by 5%.After fluidized gasification device 4, gas temperature is reduced to 950 DEG C, and coal gas is through gas
Nitrogen is preheated by heat exchanger, and now gas temperature is reduced to 600 DEG C further.Coal through gas preheating
The pre-hot nitrogen of gas to 550 DEG C, this nitrogen sends into fluidized bed pyrolyzer as the heat carrier of jet coal pyrolysis of coal
In.The gas mixture that pyrolysis produces is sent into oil gas condensation device and is condensed, and obtains oil, coal gas etc.
Addition product.Pyrolysis char enters in half coke bin 8, and a part of semicoke is prepared raw material as water-coal-slurry and sent
Entering in grinder and be ground, the coal dust after grinding makes water-coal-slurry with water.A part in half coke bin
During semicoke is as in fluidized-bed gasification furnace, the carbon source of reaction sends into fluidized-bed gasification furnace, in fluidized gasification
A generating gasification reaction in stove.
It should be noted that each embodiment above by reference to described by accompanying drawing is only in order to illustrate this practicality
Novel and unrestricted scope of the present utility model, it will be understood by those within the art that, not
The amendment on the premise of departing from spirit and scope of the present utility model, this utility model carried out or equivalent
Replace, all should contain within the scope of this utility model.Additionally, unless the context outside indication,
The word occurred in the singular includes plural form, and vice versa.It addition, unless stated otherwise, that
All or part of of any embodiment can make in conjunction with all or part of of any other embodiments
With.
Claims (6)
1. a coal water slurry gasification coal gas waste heat recycling system, including: coal slurry gasifier (3), fluidized gasification device (4), gas heat exchanger (5) and fluidized bed pyrolyzer (6)；The gas exit of described coal slurry gasifier (3) is connected with the gas feed of described fluidized gasification device (4)；The gas outlet of described fluidized gasification device (4) is connected with the gas inlet of described gas heat exchanger (5)；The nitrogen outlet of described gas heat exchanger (5) is connected with the gas feed of described fluidized bed pyrolyzer (6).
Coal water slurry gasification coal gas waste heat recycling system the most according to claim 1, it is characterised in that also include: coal pulverizer (1), water-coal-slurry preparation facilities (2)；
The semicoke outlet of described coal pulverizer (1) is connected with the semicoke import of described water-coal-slurry preparation facilities (2)；The outlet of described water-coal-slurry preparation facilities (2) is connected with the water-coal-slurry import of described coal slurry gasifier (3).
Coal water slurry gasification coal gas waste heat recycling system the most according to claim 1 and 2, it is characterized in that, also include that oil gas condensation device (7), the oil gas vent of described fluidized bed pyrolyzer (6) are connected with described oil gas condensation device (7).
Coal water slurry gasification coal gas waste heat recycling system the most according to claim 2, it is characterised in that also include: half coke bin (8)；The import of described half coke bin (8) exports with the semicoke of described fluidized bed pyrolyzer (6) and is connected.
Coal water slurry gasification coal gas waste heat recycling system the most according to claim 4, it is characterised in that the semicoke outlet of described half coke bin (8) is connected with the semicoke import of described fluidized gasification device (4).
Coal water slurry gasification coal gas waste heat recycling system the most according to claim 4, it is characterised in that the semicoke outlet of described half coke bin (8) is connected with the import of described coal pulverizer (1).
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| CN201620349465.2U CN205710622U (en) | 2016-04-22 | 2016-04-22 | A kind of coal water slurry gasification coal gas waste heat recycling system |
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| CN201620349465.2U CN205710622U (en) | 2016-04-22 | 2016-04-22 | A kind of coal water slurry gasification coal gas waste heat recycling system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105779018A (en) * | 2016-04-22 | 2016-07-20 | 北京神雾环境能源科技集团股份有限公司 | Recycling system and method for gas waste heat of coal water slurry gasification |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105779018A (en) * | 2016-04-22 | 2016-07-20 | 北京神雾环境能源科技集团股份有限公司 | Recycling system and method for gas waste heat of coal water slurry gasification |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 102200 Beijing City, Changping District science and Technology Park Chang Huai Lu No. 155 Patentee after: Shenwu science and technology group Limited by Share Ltd Address before: 102200 Beijing City, Changping District science and Technology Park Chang Huai Lu No. 155 Patentee before: Beijing Shenwu Environment Energy Technology Group Co., Ltd. |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Recycling system and method for gas waste heat of coal water slurry gasification Effective date of registration: 20180307 Granted publication date: 20161123 Pledgee: Bank of Nanjing, Limited by Share Ltd, Beijing branch Pledgor: Shenwu science and technology group Limited by Share Ltd Registration number: 2018990000177 |
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Effective date of registration: 20180724 Granted publication date: 20161123 |
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Date of cancellation: 20210724 Granted publication date: 20161123 |
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Effective date of registration: 20210724 Granted publication date: 20161123 |