CN107151567A - Coal water slurry gasification system and its technique - Google Patents
Coal water slurry gasification system and its technique Download PDFInfo
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- CN107151567A CN107151567A CN201710513035.9A CN201710513035A CN107151567A CN 107151567 A CN107151567 A CN 107151567A CN 201710513035 A CN201710513035 A CN 201710513035A CN 107151567 A CN107151567 A CN 107151567A
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- 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
- C10J3/48—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
- C10J3/721—Multistage gasification, e.g. plural parallel or serial gasification stages
-
- 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
- C10J3/86—Other features combined with waste-heat boilers
-
- 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
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0913—Carbonaceous raw material
-
- 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
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0953—Gasifying agents
- C10J2300/0959—Oxygen
-
- 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
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0953—Gasifying agents
- C10J2300/0973—Water
- C10J2300/0976—Water as steam
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
- Y02E20/18—Integrated gasification combined cycle [IGCC], e.g. combined with carbon capture and storage [CCS]
-
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The invention provides a kind of coal water slurry gasification system and its technique, it is related to Coal Gasification Technology field.The system includes gasification unit, including gasification furnace and grey dreg-locking hopper；Gasification furnace includes one section of bottom main reaction region, two sections of top assisted reaction area and the lime-ash shock chamber of connection, and lime-ash shock chamber is connected with grey dreg-locking hopper；Separative element, including cyclone separator and the first collection ash can；Heat recovery unit, including the useless pot of coal gas, drum and the second collection ash can；Drum is connected with the tubulation in the useless pot of coal gas；The gas outlet of cyclone separator is connected with the air inlet of the useless pot of coal gas；Coal gas gives up pot provided with exhaust outlet；The superheated steam part that the useless pot of coal gas is produced is passed through the inlet port in the two sections of assisted reaction areas in top, and a part is communicated with the external world.The problem of present invention alleviates inefficient traditional coal slurry gasification systematic heat utilization and relatively low calorific value of gas that produce, sets whole system flow efficiency of utilization high and can realize the controllable adjustment to the calorific value of gas of generation by present system each unit.
Description
Technical field
The present invention relates to Coal Gasification Technology field, in particular to a kind of coal water slurry gasification system and its technique.
Background technology
Coal Gasification refers to make raw material with coal, to produce industrial fuel gas, and it is clean, efficiently utilizes the most main of coal
Want one of approach, such as fuel cell, coal gas combined cycle generation technology.Coal gas application field widely, can be used to do
Fuel gas (industrial combustion gas and domestic gas), material gas, coal gas combined cycle generation, fuel cell and liquid fuel etc..
Existing coal-water slurry gasification system flow is mainly：Water-coal-slurry together enters nozzle with oxygen, utilizes nozzle
Enter gasification furnace combustion chamber together, carry out gasification reaction under the conditions of 1200~1300 DEG C in combustion chamber, reacted coal gas enters
Enter gasification furnace shock chamber, carry out Quench using water in shock chamber, gas temperature is cooled to 260 DEG C or so submittings, submitting
Coal gas enters scrubbing tower bottom, in scrubbing tower, and coal gas carries out gas washing with the washings entered at the top of scrubbing tower, by coal
Temperature degree drops to 190~230 DEG C and is conveyed to user.
Existing coal-water slurry gasification system still has problems with：
1st, the coal gas of high temperature that 1300 DEG C or so are produced in combustion chamber is directly cooled to 260 DEG C with water Quench so that a large amount of
Gas sensible heat and steam latent heat waste, gasification furnace send out coal gas be directly entered scrubbing tower, carry out wash cooling with water again,
Whole flow process does not all carry out effective recycling to substantial amounts of gas sensible heat and steam latent heat, and efficiency of utilization is not high；
2nd, existing coal water slurry gasification reaction temperature is higher, reaches 1200~1350 DEG C, the coal gas produced on this condition
Middle methane content is very low, only ppm ranks so that the calorific value of gas of existing coal water slurry gasification technology production is relatively low, it is impossible to
Used as fuel gas；
3rd, material water-coal-slurry and gasifying agent oxygen enter gasification furnace from top single injector so that coal slurry atomizing effect is not good,
Feed coal is not in time for reaction also and has just gone out combustion chamber reaction zone so that the residual carbon content in lime-ash is higher.
In view of this, it is special to propose the present invention.
The content of the invention
An object of the present invention is to provide a kind of coal water slurry gasification system, and the system has heat recovery unit, from
The high-temperature gas that gasification furnace comes out, after dry method gas solid separation, a large amount of sensible heats of high-temperature gas is reclaimed using useless pot, can be obtained
It is partly personal for gasification furnace reaction to superheated steam, partly send outside, whole flow process efficiency of utilization is high, in addition, in the system
Gasification furnace is two sections of gasification furnaces, and the high-temperature gas sensible heat produced after the reaction of lower reaction zone is as thermal source, and on top, reaction zone adds
Enter raw material and carry out secondary response so that available gas composition is improved in gas, while by adjusting adding for top reaction zone raw material
The regulation that methane gas content is produced to secondary response can be realized by entering amount, so as to realize the controllable tune to the calorific value of gas of generation
Section.
The second object of the present invention is to provide a kind of and supporting coal-water slurry gasification of the coal water slurry gasification system, is somebody's turn to do
Technique has and above-mentioned coal water slurry gasification system identical advantage.
In order to realize the above-mentioned purpose of the present invention, spy uses following technical scheme：
A kind of coal water slurry gasification system, including：
Gasification unit, including gasification furnace and grey dreg-locking hopper；
The gasification furnace includes one section of the bottom main reaction region and two sections of top assisted reaction area of connection, one section of the bottom
Main reaction region side is provided with nozzle, and described two sections of assisted reaction area lower sides in top are provided with inlet port, the bottom one
Section main reaction region bottom is provided with lime-ash shock chamber, the lime-ash output end of the lime-ash shock chamber and the input of the grey dreg-locking hopper
End connection；
Separative element, including cyclone separator and the first collection ash can；The output end of the cyclone separator and described first
Collect the input connection of ash can；Gas outlet and the import of the cyclone separator connect above described two sections of assisted reaction areas in top
It is logical；
Heat recovery unit, including the useless pot of coal gas, drum and the second collection ash can；The coal gas give up pot output end with it is described
The input connection of second collection ash can, the drum is connected with the tubulation in the useless pot of the coal gas；The cyclone separator goes out
Gas port is connected with the air inlet of the useless pot of the coal gas；The coal gas gives up pot provided with exhaust outlet；
The superheated steam part that the useless pot of the coal gas is produced is passed through the inlet port in the two sections of assisted reaction areas in top, one
Part is communicated with the external world.
Further, on the basis of technical solution of the present invention, the useless pot of coal gas includes housing, waste heat heat exchanging pipe and steam mistake
Hot tubulation；
The waste heat heat exchanging pipe is arranged in housing, and the waste heat heat exchanging pipe is provided with feed tube and drain pipe, institute
State feed tube to connect with the drum bottom, the drain pipe in the middle part of the drum with connecting；
The steam superheating tubulation is arranged in housing and above the waste heat heat exchanging pipe, the steam superheating row
Pipe is provided with air inlet pipe and escape pipe, and the air inlet pipe is connected with the drum, and the escape pipe is a part of with the top two
The inlet port connection in section assisted reaction area a, part is communicated with the external world；
The lower housing portion is provided with separated space, for gas ash content from.
Preferably, on the basis of technical solution of the present invention, the one section of main reaction region in bottom side is at least oppositely arranged
A pair of nozzles.
Further, on the basis of technical solution of the present invention, the coal water slurry gasification system also includes：Washing unit, institute
Stating washing unit includes scrubbing tower, and the exhaust outlet of the useless pot of the coal gas is connected with the air inlet of the scrubbing tower.
Further, on the basis of technical solution of the present invention, the coal water slurry gasification system also includes：Grey water process list
Member, the grey unit for treating water includes flash tank, subsider, ash water tank and mortar-trough；
The flash tank is connected with the discharge outlet of the scrubbing tower and the discharge outlet of the lime-ash shock chamber respectively；It is described heavy
Drop groove is connected with the flash tank, and the upper outlet of the subsider is connected with the ash water tank, and the bottom of the subsider goes out
Mouth is connected with the mortar-trough；
The first collection ash can and the second collection ash can are connected with the subsider.
Further, on the basis of technical solution of the present invention, the grey unit for treating water also includes deoxygenation tank, knockout drum
And heat exchanger；
The deoxygenation tank is connected by grey water pump with the ash water tank, the deoxygenation tank by deoxygenation water pump with it is described
Heat exchanger is connected；
The heat exchanger is connected with the scrubbing tower and the knockout drum respectively；The flash tank passes sequentially through the heat exchange
Connected after device and the knockout drum with the subsider.
Preferably, on the basis of technical solution of the present invention, the coal water slurry gasification system also includes：Dry method dust is filled
Put；
The exhaust outlet of the useless pot of the coal gas is connected with the air inlet of the dry-method dust-removal device.
Further, on the basis of technical solution of the present invention, the coal water slurry gasification system also includes：Subsider, buck
Groove and mortar-trough；The dry-method dust-removal device is connected with the subsider；
The first collection ash can and the second collection ash can are connected with the subsider；
The upper outlet of the subsider is connected with the ash water tank, the lower part outlet of the subsider and the mortar-trough
Connection.
A kind of coal-water slurry gasification, comprises the following steps：
Raw material slurry is entered with gasifying agent by nozzle to react in one section of the bottom main reaction region of gasification furnace, reacted gas
Body enters in two sections of the top assisted reaction area of gasification furnace, the raw material slurry secondary counter with two sections of top assisted reaction area inlet port
Should；
Gas enters cyclone separator after being reacted through gasification furnace, and the lime-ash after being cooled down through slag from gasifying furnace shock chamber enters ash charge
Discharged after dreg-locking hopper；
Gas after being separated through cyclone separator enters the useless pot of coal gas, and the solid after being separated through cyclone separator enters first
Collect ash can；
The saturated vapor that drum comes is overheated into superheated steam by the high-temperature gas in the useless pot of coal gas, and a superheated steam part is entered
In two sections of the top assisted reaction area for entering gasification furnace, a part is sent outside.
Further, on the basis of technical solution of the present invention, the raw material slurry into two sections of top assisted reaction area account for into
Enter the 15~30% of gasification furnace raw material slurry total amount.
Compared with the prior art, the present invention has the advantages that：
(1) coal water slurry gasification system that the present invention is provided includes gasification unit, separative element and heat recovery unit, gasification
The gasification furnace of unit is two stage gasifier, and the high-temperature gas sensible heat produced after the reaction of lower reaction zone is anti-on top as thermal source
Answer area to add slurry and carry out secondary response so that available gas composition is improved in gas, while former by adjusting top reaction zone
The addition of material can realize the regulation that methane gas content is produced to secondary response, so as to realize to the calorific value of gas of generation
Controllable adjustment.The coal gas of high temperature of gasification furnace is recycled by heat recovery unit, after dry method gas solid separation, using useless
Pot reclaims a large amount of sensible heats of high-temperature gas, and by-product obtains superheated steam, partly reenters gasification furnace and promotes secondary response, portion
Exceptionally send, whole flow process efficiency of utilization is high.
(2) present invention utilizes two-period form gasification furnace, and the coal gas of high temperature sensible heat that first paragraph is produced can be secondary as second segment
The thermal source of reaction, second segment adds slurry and carries out producing hydrogen and methane gas after secondary response again so that in coal gas effectively
Gas componant and calorific value are significantly improved.
(3) present invention adds the addition of slurry by adjusting gasification furnace second segment again, can realize to producing coal gas
The regulation of middle methane gas content, thus realize to produce calorific value of gas controllable adjustment so that the coal gas of generation can by with
Make different purposes, using in different industries, coal gas is applied widely.
Brief description of the drawings
, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical scheme of the prior art
The accompanying drawing used required in embodiment or description of the prior art is briefly described, it should be apparent that, in describing below
Accompanying drawing is some embodiments of the present invention, for those of ordinary skill in the art, before creative work is not paid
Put, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of the coal water slurry gasification system of one embodiment of the present invention；
Fig. 2 is gasification unit structural representation in the coal water slurry gasification system of one embodiment of the present invention；
Heat recovery unit structural representation in the coal water slurry gasification system of Fig. 3 one embodiment of the present invention；
Fig. 4 shows for the structure of scrubbing tower in the coal water slurry gasification system of one embodiment of the present invention and grey unit for treating water
It is intended to；
Fig. 5 is the structural representation of the coal water slurry gasification system of the embodiment of the present invention one；
Fig. 6 is the structural representation of the coal water slurry gasification system of the embodiment of the present invention two.
Icon：10- gasification units；11- gasification furnaces；One section of 111- bottoms main reaction region；Two sections of 112- tops assisted reaction
Area；113- lime-ash shock chamber；12- ash dreg-locking hoppers；13- shurry pumps；20- separative elements；21- cyclone separators；22- first collects ash
Tank；30- heat recovery units；31- coal gas gives up pot；32- drums；33- second collects ash can；311- housings；312- waste heats heat exchange row
Pipe；313- steam superheating tubulations；40- washing units；41- scrubbing towers；50- ash unit for treating water；51- flash tanks；52- is separated
Tank；53- subsiders；54- ash water tanks；55- mortar-troughs；56- deoxygenation tanks；57- heat exchangers；58- ash water pumps；59- deoxygenation water pumps.
Embodiment
Technical scheme is clearly and completely described below in conjunction with accompanying drawing, it is clear that described implementation
Example is a part of embodiment of the invention, rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill
The every other embodiment that personnel are obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
In the description of the invention, it is necessary to explanation, the orientation or position of the instruction such as term " on ", " under ", " interior ", " outer "
It is, based on orientation shown in the drawings or position relationship, to be for only for ease of the description present invention and simplify description to put relation, rather than
Indicate or imply that the device or element of meaning there must be specific orientation, with specific azimuth configuration and operation, therefore can not
It is interpreted as limitation of the present invention.In addition, term " first ", " second ", " the 3rd " are only used for describing purpose, and it is not intended that
Indicate or imply relative importance.
According to the first aspect of the invention there is provided a kind of coal water slurry gasification system, Fig. 1 is a kind of embodiment party of the invention
The structural representation of the coal water slurry gasification system of formula；Fig. 2 is gasification in the coal water slurry gasification system of one embodiment of the present invention
The structural representation of unit；The structure of heat recovery unit is shown in the coal water slurry gasification system of Fig. 3 one embodiment of the present invention
It is intended to；Fig. 4 for scrubbing tower and grey unit for treating water in the coal water slurry gasification system of one embodiment of the present invention structural representation
Figure.
As shown in figures 1-4, coal water slurry gasification system includes：
Gasification unit 10, including gasification furnace 11 and grey dreg-locking hopper 12；Gasification furnace 11 includes one section of the bottom main reaction of connection
Area 111 and two sections of top assisted reaction area 112, the one section of main reaction region 111 in bottom side are provided with nozzle, and two sections of top auxiliary is anti-
The lower side of area 112 is answered to be provided with inlet port, the one section of main reaction region 111 in bottom bottom is provided with lime-ash shock chamber 113, and lime-ash swashs
The lime-ash output end of cold house 113 is connected with the input of grey dreg-locking hopper 12；
Separative element 20, including the collection ash can 22 of cyclone separator 21 and first；The output end of cyclone separator 21 and first
Collect the input connection of ash can 22；The top gas outlet of two sections of top assisted reaction area 112 and the inlet communication of cyclone separator 21；
Heat recovery unit 30, including the useless pot 31 of coal gas, the collection ash can 33 of drum 32 and second；The output end of the useless pot 31 of coal gas
It is connected with the input of the second collection ash can 33, drum 32 is connected with the tubulation in the useless pot 31 of coal gas；The outlet of cyclone separator 21
Mouth is connected with the air inlet of the useless pot 31 of coal gas；Coal gas gives up pot 31 provided with exhaust outlet；The superheated steam one that the useless pot 31 of coal gas is produced
Divide the inlet port for being passed through the two sections of assisted reaction areas 112 in top, a part is communicated with the external world.
Gasification furnace 11 in the present invention is two-stage gasifier, including one section of the bottom main reaction region 111 of connection and top
Two sections of assisted reaction areas 112, raw material slurry can be pressurizeed by shurry pump 13, from the bottom one of gasification furnace 11 together with gasifying agent
Section main reaction region 111 enters in gasification furnace 11.
Raw material slurry can be certain by being prepared into water grinding by bituminous coal, ub-bituminous coal, lignite, petroleum coke and heavy oil etc.
The slurry of mass concentration (such as 55%-65%)；The gasifying agent that one section of bottom main reaction region is added is purity oxygen, two sections of top auxiliary
The gasifying agent that reaction zone is added is steam.
Raw material slurry is produced with CO, H with gasifying agent reaction2、CO2Based on coal gas of high temperature move up, into gasification furnace 11
In two sections of assisted reaction areas 112 of Upper Upper, the raw material slurry in two sections of assisted reaction areas 112 of Upper Upper with adding again
And steam carries out secondary response, secondary response generates H to steam again with carbon2So that available gas composition is improved in coal gas, while with
The reduction of temperature, it is also a large amount of to produce methane gas so that calorific value of gas is significantly improved.
Gasification furnace 11 uses two stage gasification, and the material of spray is supplemented using the sensible heat gasification second segment of first paragraph coal gas of high temperature
Slurry, makes the top air outlet temperature of two sections of top assisted reaction area 112 drop to 1000 DEG C or so, is conducive to improving heat utilization efficiency.
Due to adding second segment gasification, residence time of the coal gas in stove is extended, the tar in coal gas, heavy hydrocarbon compounds is filled
Divide pyrolysis, thus gas purification processing is simpler, without harmful substances such as tar, phenol in waste water, environmental pollution is less.
, can be with addition, the addition of the secondary slurry by being adjusted into two sections of 11 top of gasification furnace assisted reaction area 112
The regulation of the methane gas content in coal gas is realized, so as to carry out controllable adjustment to the calorific value of gas of generation.
When the coal gas of production is used to the chemical products such as synthesis ammonia, methanol, appropriate reduce enters the top two of gasification furnace 11
The slurry addition in section assisted reaction area 112, it might even be possible to be added without, can so cause the methane gas composition in coal gas to return
To ppm grades so that coal gas is more suitable for producing chemical products, it is adapted to production synthesis ammonia, the enterprise of methanol.
When the coal gas of production is not used as fuel gas, appropriate increase enters two sections of 11 top of gasification furnace assisted reaction area
112 slurry addition, it might even be possible to be added to 30% or so of raw material slurry total amount, can so cause methane gas in coal gas
Body composition reaches higher level so that coal gas is more suitable for being used as fuel gas, is adapted to the industries such as IGCC, ceramics, glass.
The present invention can realize the regulation of the methane gas content in the coal gas to generation so that the coal gas of generation can be by
As different purposes, using in different industries, coal gas is applied widely.
11 bottom of gasification furnace, one section of main reaction region 111 bottom is provided with lime-ash shock chamber 113, the ash of lime-ash shock chamber 113
Slag output end is connected with the input of grey dreg-locking hopper 12, and the cinder that gasification furnace 11 is produced after reacting enters lime-ash shock chamber 113, ash
Slag shock chamber 113 sets up liquid level with water, and for cooling down reacted lime-ash, lime-ash enters grey dreg-locking hopper 12 from the bottom of gasification furnace 11
Discharge.
Reacted coal gas sends out gasification furnace 11 at 1000 DEG C or so and enters cyclone separator 21, in cyclone separator 21
Gas solid separation is realized, gas is sent to the useless pot 31 of coal gas, and the coal ash separated is entered the first collection ash can 22, taken out of using waterpower.
Dry method gas solid separation is carried out using cyclone separator 21, is conducive to the recovery to high-temperature gas after separation.
The high temperature coal gas of cyclone separator 21 enters the useless pot 31 of coal gas, is given up in coal gas in pot 31, coal gas of high temperature can be by coal
The boiler water of the useless drum 32 of pot 31 of gas is heated into saturation state steam and can will further obtain middle pressure saturated vapor overheat
Vapours is pressed through in obtaining, the recycling of a large amount of sensible heats of the high-temperature gas exported to gasification furnace 11, the mistake of by-product is realized
Vapours part reacts personal for gasification furnace 11, with coming from material in two sections of assisted reaction areas 112 of superheated steam input Upper Upper
The raw material slurry of stock pump 13 carries out secondary response under the high temperature conditions, and secondary response can be promoted to carry out, the superheated steam portion of by-product
Branch exceptionally send, and whole flow process efficiency of utilization is high.
Gas solid separation is carried out again to coal gas in the coal gas useless bottom of pot 31, the gas temperature after separation drops to 250 DEG C,
The coal ash separated is sent to the second collection ash can 33, is taken out of using waterpower.
Traditional coal water slurry gasification system flow does not carry out effective recovery to substantial amounts of gas sensible heat and steam latent heat
Utilize, efficiency of utilization is not high and calorific value of gas of the production of existing coal water slurry gasification technology is relatively low, it is impossible to make as fuel gas
With.
The coal water slurry gasification system that the present invention is provided includes gasification unit, separative element and heat recovery unit, and gasification is single
The gasification furnace of member is two stage gasifier, and the high-temperature gas sensible heat produced after the reaction of lower reaction zone is as thermal source, in top reaction
Area adds slurry and carries out secondary response so that available gas composition is improved in gas, while by adjusting top reaction zone raw material
Addition can realize to secondary response produce methane gas content regulation so that realize to the calorific value of gas of generation can
Control regulation.The coal gas of high temperature of gasification furnace is recycled by heat recovery unit, after dry method gas solid separation, useless pot is utilized
A large amount of sensible heats of high-temperature gas are reclaimed, and by-product obtains superheated steam, partly reenters gasification furnace and promotes secondary response, part
Send outside, whole flow process efficiency of utilization is high.
In a preferred embodiment, as shown in figure 3, coal gas gives up, pot 31 includes housing 311, waste heat heat exchanging pipe
312 and steam superheating tubulation 313；
Waste heat heat exchanging pipe 312 is arranged in housing 311, and waste heat heat exchanging pipe 312 is provided with feed tube and drain pipe, enters
Liquid pipe is connected with the bottom of drum 32, and drain pipe is connected with the middle part of drum 32；
Steam superheating tubulation 313 is arranged in housing 311 and positioned at the top of waste heat heat exchanging pipe 312, steam superheating tubulation
313 are provided with air inlet pipe and escape pipe, and air inlet pipe is connected with drum 32, an escape pipe part and two sections of top assisted reaction area
112 inlet port connection a, part is communicated with the external world；
The bottom of housing 311 is provided with separated space, for gas ash content from.
The high-temperature gas that gasification unit 10 is generated enters after cyclone separator 21 carries out rough dusting and entered, and coal gas gives up pot
31, after the soft water after the heating of waste heat heat exchanging pipe 312 produces saturated vapor in the drum 32, by drum 32 by saturated vapor
Input is superheated steam into steam superheating tubulation 313, then by used heat heated by gas, and the vapor portion after overheat is sent to gasification
Two sections of 11 top of stove assisted reaction area 112, remaining is sent outside.
Can have using the waste heat heat exchanging pipe and steam superheating tubulation in housing to the heat of raw gas/unstripped gas
Effect is utilized, waste heat recovery efficiency high, and byproduct steam taste is high.
In a preferred embodiment, the side of one section of bottom main reaction region 111 is at least oppositely arranged a pair of nozzles.
Preferably, the one section of main reaction region 111 in bottom two ends, which are set, is each provided with a nozzle, and two nozzles are opposed right in 180 °
Spray, raw material slurry is added in gasification reactor with gasifying agent by nozzle to be reacted.
Slurry enters gasification furnace from single injector so that coal slurry atomizing effect is not good, and feed coal is not in time for reaction also just
Combustion chamber reaction zone is gone out so that the residual carbon content in lime-ash is higher.By two nozzles being oppositely arranged make coal slurry respectively from
The two ends of one section of gasification furnace bottom main reaction region enter, and are allowed to mutually hit atomization, atomizing effect is good, and coal fills with gasifying agent reaction
Point, gasification efficiency is high, and efficiency of carbon con version is high.
As a preferred embodiment, coal water slurry gasification system also includes：Washing unit 40, washing unit 40 includes
Scrubbing tower 41, the exhaust outlet of the useless pot 31 of coal gas is connected with the air inlet of scrubbing tower 41.
Scrubbing tower 41 is the vapour-liquid contacting column of solid valve arrangement or the vapour-liquid contacting column of vertical sieve tray structure, inside there is plate column
Plate, scrubbing tower makes coal gas decreasing temperature and increasing humidity, realizes the purpose that coal gas is given a dinner of welcome with aqueous vapor saturation.
Enter from the give up coal gas of pot 31 of coal gas from the bottom of scrubbing tower 41, in scrubbing tower 41, coal gas with from scrubbing tower 41
The washings that top enters carry out gas washing, and gas temperature is dropped into 190~230 DEG C and gives user.
Further preferably, coal water slurry gasification system also includes：Grey unit for treating water 50, grey unit for treating water 50 includes flash distillation
Tank 51, subsider 53, ash water tank 54 and mortar-trough 55；
Flash tank 51 is connected with the discharge outlet of scrubbing tower 41 and the discharge outlet of lime-ash shock chamber 113 respectively；Subsider 53 with
Flash tank 51 is connected, and the upper outlet of subsider 53 is connected with ash water tank 54, and lower part outlet and the mortar-trough 55 of subsider 53 connect
It is logical；The first collection collection ash can 33 of ash can 22 and second is connected with subsider 53.
The water that give a dinner of welcome water and lime-ash shock chamber 113 in scrubbing tower 41 are sent out is sent to flash tank 51 by pipeline.
Flash tank 51 be it is a kind of by decompression boil the container that form is discharged the on-condensible gas incorporated in liquid again, reality
Existing liquid release fixed gas, cooling and the purpose containing solid concentration.Concentration buck after flash distillation sends into subsider 53 by pipeline.
Subsider 53 is a kind of fixed equipment separated made by gravitational settling in liquid, the concentrate of its bottom
Lime-ash in outwards output, the first collection collection ash can 33 of ash can 22 and second enters subsider 53, after settlement upper clear supernate overflow
Return in ash water tank 54, realize system water circulation use.
Further, grey unit for treating water 50 also includes deoxygenation tank 56, knockout drum 52 and heat exchanger 57；
Deoxygenation tank 56 is connected by grey water pump 58 with ash water tank 54, and deoxygenation tank 56 passes through deoxygenation water pump 59 and heat exchanger
57 connections；Heat exchanger 57 is connected with scrubbing tower 41 and knockout drum 52 respectively；Flash tank 51 passes sequentially through heat exchanger 57 and knockout drum
Connected after 52 with subsider 53.
The equipment that deoxygenation tank 56 is a kind of utilization low-pressure steam heating system water to reduce oxygen in water concentration, ash
Water in tank 54 enters deoxygenation tank 56 and carries out low temperature deoxygenation, and the deaerated water after deoxygenation is sent to by deoxygenation water pump 59 to be changed
Hot device 57 is used after heating for the washings of scrubbing tower 41, and realization is recycled.
Steam after the flash distillation of flash tank 51 is as thermal source feeding heat exchanger 57, for heating the deaerated water after deoxygenation,
Steam after heat exchange realizes gas-liquid separation by knockout drum 52, and liquid feeding subsider 53 is handled.
As another preferred embodiment, coal water slurry gasification system also includes：Dry-method dust-removal device；Coal gas gives up pot 31
Exhaust outlet connected with the air inlet of dry-method dust-removal device.
Dry-method dust-removal device can select conventional nonaqueous dust cleaner.
Supporting coal water slurry gasification system also includes with dry-method dust-removal device：Subsider 53, ash water tank 54 and mortar-trough 55；
Subsider 53 is connected with dry-method dust-removal device；
First collection ash can 22 is stated subsider 53 with the second collection ash can 33 and connected；The upper outlet and ash water tank of subsider 53
54 connections, the lower part outlet of subsider 53 is connected with mortar-trough 55.
After scrubbing tower is replaced with dry-method dust-removal device, washed because water is not used in dry-method dust-removal device, therefore not
Waste water is produced, so as to cancel part waste water treatment device, for example：The equipment such as flash tank, knockout drum, deoxygenation tank, in addition,
The size of the equipment such as subsider, ash water tank, deoxygenation tank, mortar-trough can also significantly be reduced.
Coal gas from the useless pot of coal gas carries out follow-up settlement treatment after being purified by dry-method dust-removal device, net using dry method
Change mode post-processing more facilitates, and device therefor is few, efficiency high.
According to another aspect of the present invention there is provided a kind of coal-water slurry gasification, comprise the following steps：
Raw material slurry is entered with gasifying agent by nozzle to react in one section of the bottom main reaction region 111 of gasification furnace 11, reaction
Gas afterwards enters in two sections of the top assisted reaction area 112 of gasification furnace 11, with two sections of the top inlet port of assisted reaction area 112
Raw material slurry secondary response；
Gas enters cyclone separator 21 after being reacted through gasification furnace 11, after being cooled down through the lime-ash shock chamber 113 of gasification furnace 11
Lime-ash is discharged after entering grey dreg-locking hopper 12；
Gas after being separated through cyclone separator 21 enters the useless pot 31 of coal gas, and the solid after being separated through cyclone separator 21 enters
Enter the first collection ash can 22；
The saturated vapor of drum 32 is overheated into superheated steam, superheated steam one by the high-temperature gas in the useless pot 31 of coal gas
Divide and enter in two sections of the top assisted reaction area 112 of gasification furnace 11, a part is sent outside.
The coal-water slurry gasification is carried out in above-mentioned coal water slurry gasification system, with above-mentioned coal water slurry gasification system
Identical advantage, will not be repeated here.
Preferably, the raw material slurry into two sections of top assisted reaction area 112 is accounted for into the raw material slurry total amount of gasification furnace 11
15~30%.
The raw material slurry in typical but non-limiting two sections of assisted reaction areas in top add mass percent be 15%,
20%th, 25% or 30%.
Add the addition of slurry again by adjusting gasification furnace second segment, can realize to producing methane gas in coal gas
The regulation of content, methane gas adjustable extent is reached between 1~8%, so that the controllable adjustment to producing calorific value of gas is realized,
Enable produce coal gas be used as different purposes, using in different industries, coal gas is applied widely, for example for
During the chemical products such as production synthesis ammonia, methanol, addition will be lacked, it might even be possible to be added without, and can so cause the first in coal gas
Alkane gas componant returns to ppm grades, during as the industry fuel gas such as IGCC, ceramics, glass, and addition is big so that first in coal gas
Alkane gas componant reaches higher level.
Embodiment one
A kind of coal water slurry gasification system, as shown in figure 5, the system includes：
Gasification unit 10, including gasification furnace 11, grey dreg-locking hopper 12 and shurry pump 13；Gasification furnace 11 includes the bottom one of connection
Section main reaction region 111 and two sections of top assisted reaction area 112, the one section of main reaction region 111 in bottom side is relatively set with a pair of sprays
Mouth, two nozzles are opposed to spray in 180 °, and two sections of the top lower side of assisted reaction area 112 is provided with inlet port, one section of bottom master
The bottom of reaction zone 111 is provided with lime-ash shock chamber 113, the lime-ash output end of lime-ash shock chamber 113 and the input of grey dreg-locking hopper 12
End connection；Shurry pump 13 is used for slurry input nozzle；
Separative element 20, including the collection ash can 22 of cyclone separator 21 and first；The output end of cyclone separator 21 and first
Collect the input connection of ash can 22；The top gas outlet of two sections of top assisted reaction area 112 and the inlet communication of cyclone separator 21；
Heat recovery unit 30, including the useless pot 31 of coal gas, the collection ash can 33 of drum 32 and second；The output end of the useless pot 31 of coal gas
It is connected with the input of the second collection ash can 33, drum 32 is connected with the tubulation in the useless pot 31 of coal gas；The outlet of cyclone separator 21
Mouth is connected with the air inlet of the useless pot 31 of coal gas；Coal gas gives up pot 31 provided with exhaust outlet；The superheated steam one that the useless pot 31 of coal gas is produced
Divide the inlet port for being passed through the two sections of assisted reaction areas 112 in top, a part is communicated with the external world.
Washing unit 40, washing unit 40 includes scrubbing tower 41, the air inlet of the exhaust outlet and scrubbing tower 41 of the useless pot 31 of coal gas
Mouth connection.
Grey unit for treating water 50, grey unit for treating water 50 include flash tank 51, subsider 53, ash water tank 54, mortar-trough 55,
Deoxygenation tank 56, knockout drum 52 and heat exchanger 57；
Flash tank 51 is connected with the discharge outlet of scrubbing tower 41 and the discharge outlet of lime-ash shock chamber 113 respectively；Flash tank 51 according to
Secondary by being connected after heat exchanger 57 and knockout drum 52 with subsider 53, the upper outlet of subsider 53 is connected with ash water tank 54, is sunk
The lower part outlet of drop groove 53 is connected with mortar-trough 55；The first collection collection ash can 33 of ash can 22 and second is connected with subsider 53；Remove
Oxygen tank 56 is connected by grey water pump 58 with ash water tank 54, and deoxygenation tank 56 is connected by deoxygenation water pump 59 with heat exchanger 57；Change
Hot device 57 is connected with scrubbing tower 41 and knockout drum 52 respectively.
Wherein, the useless pot 31 of coal gas includes housing 311, waste heat heat exchanging pipe 312 and steam superheating tubulation 313；Waste heat exchanges heat
Tubulation 312 is arranged in housing 311, and waste heat heat exchanging pipe 312 is provided with feed tube and drain pipe, feed tube and the bottom of drum 32
Connection, drain pipe is connected with the middle part of drum 32；Steam superheating tubulation 313 is arranged in housing 311 and positioned at waste heat heat exchanging pipe
312 tops, steam superheating tubulation 313 is provided with air inlet pipe and escape pipe, and air inlet pipe is connected with drum 32, an escape pipe part and
The inlet port connection in two sections of top assisted reaction area 112 a, part is communicated with the external world；The bottom of housing 311 is provided with separated space,
For gas ash content from.
The technical process of the system is as follows：
Raw material slurry is pressurizeed by shurry pump 13, from one section of the bottom of gasification furnace 11 main reaction region 111 together with gasifying agent
Two ends nozzle enters in gasification furnace 11, and the raw material slurry and gasifying agent of penetrating to spray reaction, produce with CO, H2、CO2For
Main coal gas of high temperature, coal gas of high temperature is moved up, into 11 Upper Upper of gasification furnace, two sections of assisted reaction areas 112, on top
The superheated steam progress of the raw material slurry and the by-product of pot 31 that given up from coal gas that add in the assisted reaction area 112 of two sections of top and again
Secondary response, steam reacts generation H again with carbon2And CH4Gas.Gasification furnace 11, which is sent out, at 1000 DEG C or so enters cyclonic separation
Device 21, realizes gas solid separation in cyclone separator 21, and gas is sent to the useless pot 31 of coal gas, and the coal ash separated enters the first collection
Ash can 22, is taken out of using waterpower.The cinder that one section of 11 bottom of gasification furnace main reaction region 111 is produced after reacting enters lime-ash shock chamber
113, liquid level is set up with cooling water in lime-ash shock chamber 113, for cooling down reacted lime-ash, lime-ash enters from the bottom of gasification furnace 11
Ash charge dreg-locking hopper 12 is discharged.The water of cooling lime-ash comes from deoxygenation water pump 59, and the water after cooling is from the lime-ash shock chamber of gasification furnace 11
113 bottoms are discharged, and are sent to flash tank 51.
Enter the useless pot 31 of coal gas from the high temperature coal gas of cyclone separator 21, given up in coal gas in pot 31, coal gas of high temperature is first
The middle pressure saturated vapor of drum 32 is overheated, it is auxiliary that the superheated steam part after overheat is sent to two sections of 11 top of gasification furnace
Reaction zone 112 is helped, remaining is sent outside.Boiler water is heated into saturation state and steamed into pressure saturation in the by-product of drum 32 by coal gas afterwards
Vapour.Gas solid separation is carried out again to coal gas in the coal gas useless bottom of pot 31, the gas temperature after separation drops to 250 DEG C or so and sent
Into scrubbing tower 41, the coal ash separated is sent to the second collection ash can 33, is taken out of using waterpower.
Enter from the give up coal gas of pot 31 of coal gas from the bottom of scrubbing tower 41, in scrubbing tower 41, coal gas with from scrubbing tower 41
The washings that top enters carry out gas washing, and gas temperature is dropped into 190~230 DEG C and gives user.
Buck after being washed in scrubbing tower 41 comes out what is sent out with the lime-ash shock chamber 113 of gasification furnace 11 from the bottom of scrubbing tower 41
Water is sent to flash tank 51 together, and the grey water section of flash tank 51 flashes to steam, and steam is sent to heat exchanger 57, for heat from
The deaerated water that deoxygenation water pump 59 is sent, is sent in scrubbing tower 41 and uses afterwards, and the steam after heat exchange is real by knockout drum 52
Existing gas-liquid separation, the liquid separated is sent to subsider 53, and gas is sent to torch burning disposal.Concentration buck after flash distillation
Subsider 53 is sent to, in subsider 53, solid natural subsidence is carried out using medicament and gravity, realizes the separation of solid-liquid.It is heavy
The clear liquid overflow for dropping the top of groove 53 enters ash water tank 54, and being sent to deoxygenation tank 56 using grey water pump 58 carries out low temperature deoxygenation, removes
Deaerated water after oxygen is sent to heat exchanger 57 using deoxygenation water pump 59 and heated.The concentrated mortar of the bottom of subsider 53 is sent to ash from bottom
Stock tank 55, with being pumped into user.
The present embodiment has the following advantages that：
1st, as-fired coal slurry enters from the one section of main reaction region in gasification furnace bottom two ends respectively, is allowed to mutually hit atomization, atomization
Effect is good, and coal and gasifying agent reaction are abundant, and gasification efficiency is high, and efficiency of carbon con version is high；
2nd, the coal gas of high temperature sensible heat by the use of the one section of main reaction region generation in bottom adds raw material again as thermal source at vertical section
Secondary response is carried out, H is additionally generated2So that available gas composition is improved in coal gas, while methane gas can be produced so that
Calorific value of gas is significantly improved；
3rd, by the addition for the secondary coal slurry for being adjusted into two sections of gasification furnace top assisted reaction area, it is possible to achieve coal gas
In methane gas content regulation, so as to the calorific value of gas of generation carry out controllable adjustment；
4th, the coal gas of high temperature come out from gasification furnace, by dry method gas solid separation, reclaims coal gas of high temperature using useless pot afterwards
A large amount of sensible heats press through vapours in coming, part it is personal it is outer also send outside, whole flow process efficiency of utilization is high.
Embodiment two
A kind of coal water slurry gasification system, as shown in fig. 6, gasification unit 10, separative element 20 and heat recovery in the system
Unit 30 is identical with embodiment one, is at nonaqueous dust cleaner, buck from the system washing unit 40 unlike embodiment one
Reason unit 50 includes：Subsider 53, ash water tank 54 and mortar-trough 55；The first collection collection ash can 33 of ash can 22 and second states subsider
53 connections；The upper outlet of subsider 53 is connected with ash water tank 54, and the lower part outlet of subsider 53 is connected with mortar-trough 55.
The embodiment is replaced after scrubbing tower using efficient dry-method dust-removal device, flash tank, heat exchanger, knockout drum, deaerated water
Groove, grey water pump can be cancelled, and subsider, ash water tank, deoxygenation water pump, mortar-trough equipment size or capacity of equipment can be realized big
Amplitude reduces, and has saved equipment and floor space.
Although being illustrated with specific embodiment and describing the present invention, but it will be appreciated that in the essence without departing substantially from the present invention
Many other changes and modification can be made in the case of god and scope.It is, therefore, intended that wrapping in the following claims
Include all such changes and modifications belonged in the scope of the invention.
Claims (10)
1. a kind of coal water slurry gasification system, it is characterised in that including：
Gasification unit (10), including gasification furnace (11) and grey dreg-locking hopper (12)；
The gasification furnace (11) includes one section of the bottom main reaction region (111) and two sections of top assisted reaction area (112) of connection, institute
State one section of bottom main reaction region (111) and be provided with nozzle sideways, described two sections of assisted reaction area (112) lower sides in top are set
There is inlet port, described one section of main reaction region (111) bottom in bottom is provided with lime-ash shock chamber (113), the lime-ash shock chamber
(113) lime-ash output end is connected with the input of the grey dreg-locking hopper (12)；
Separative element (20), including cyclone separator (21) and the first collection ash can (22)；The output of the cyclone separator (21)
The input with the described first collection ash can (22) is held to be connected；Gas outlet and institute above described two sections of assisted reaction areas (112) in top
State the inlet communication of cyclone separator (21)；
Heat recovery unit (30), including the useless pot (31) of coal gas, drum (32) and the second collection ash can (33)；The coal gas gives up pot
(31) output end is connected with the input of the described second collection ash can (33), and the drum (32) is given up with the coal gas in pot (31)
Tubulation connection；The gas outlet of the cyclone separator (21) is connected with the air inlet of the useless pot (31) of the coal gas；The coal gas
Useless pot (31) is provided with exhaust outlet；
The give up superheated steam part of pot (31) generation of the coal gas is passed through the entrance of the two sections of assisted reaction areas (112) in top
Mouthful, a part is communicated with the external world.
2. according to the coal water slurry gasification system described in claim 1, it is characterised in that the coal gas pot (31) that gives up includes housing
(311), waste heat heat exchanging pipe (312) and steam superheating tubulation (313)；
The waste heat heat exchanging pipe (312) is arranged in housing (311), and the waste heat heat exchanging pipe (312) is provided with feed tube
And drain pipe, the feed tube connects with the drum (32) bottom, and the drain pipe in the middle part of the drum (32) with connecting；
The steam superheating tubulation (313) is arranged in housing and above the waste heat heat exchanging pipe (312), the steam
Overheat tubulation (313) is provided with air inlet pipe and escape pipe, and the air inlet pipe is connected with the drum (32), the escape pipe one
Divide and connected with the inlet port of the two sections of assisted reaction areas (112) in top, a part is communicated with the external world；
Housing (311) bottom is provided with separated space, for gas ash content from.
3. according to the coal water slurry gasification system described in claim 1 or 2, it is characterised in that described one section of main reaction region in bottom
(111) side is at least oppositely arranged a pair of nozzles.
4. according to the coal water slurry gasification system described in claim 1 or 2, it is characterised in that the coal water slurry gasification system is also wrapped
Include：Washing unit (40), the washing unit (40) include scrubbing tower (41), the coal gas give up pot (31) exhaust outlet with it is described
The air inlet connection of scrubbing tower (41).
5. according to the coal water slurry gasification system described in claim 4, it is characterised in that the coal water slurry gasification system also includes：
Grey unit for treating water (50), the grey unit for treating water (50) includes flash tank (51), subsider (53), ash water tank (54) and ash
Stock tank (55)；
The flash tank (51) connects with the discharge outlet of the scrubbing tower (41) and the discharge outlet of the lime-ash shock chamber (113) respectively
It is logical；The subsider (53) connects with the flash tank (51), upper outlet and the ash water tank of the subsider (53)
(54) connect, the lower part outlet of the subsider (53) is connected with the mortar-trough (55)；
The first collection ash can (22) and the second collection ash can (33) are connected with the subsider (53).
6. according to the coal water slurry gasification system described in claim 5, it is characterised in that the grey unit for treating water (50) also includes
Deoxygenation tank (56), knockout drum (52) and heat exchanger (57)；
The deoxygenation tank (56) is connected by grey water pump (58) with the ash water tank (54), the deoxygenation tank (56) by except
Oxygen water pump (59) is connected with the heat exchanger (57)；
The heat exchanger (57) connects with the scrubbing tower (41) and the knockout drum (52) respectively；The flash tank (51) is successively
Connected afterwards with the subsider (53) by the heat exchanger (57) and the knockout drum (52).
7. according to the coal water slurry gasification system described in claim 1 or 2, it is characterised in that the coal water slurry gasification system is also wrapped
Include：Dry-method dust-removal device；
The give up exhaust outlet of pot (31) of the coal gas is connected with the air inlet of the dry-method dust-removal device.
8. according to the coal water slurry gasification system described in claim 7, it is characterised in that the coal water slurry gasification system also includes：
Subsider (53), ash water tank (54) and mortar-trough (55)；
The dry-method dust-removal device is connected with the subsider (53)；
The first collection ash can (22) and the second collection ash can (33) are connected with the subsider (53)；
The upper outlet of the subsider (53) is connected with the ash water tank (54), the lower part outlet of the subsider (53) and institute
State mortar-trough (55) connection.
9. a kind of coal-water slurry gasification, it is characterised in that comprise the following steps：
Raw material slurry is entered with gasifying agent by nozzle to react in one section of the bottom main reaction region (111) of gasification furnace (11), reaction
Gas afterwards enters in two sections of the top assisted reaction area (112) of gasification furnace (11), enters with two sections of top assisted reaction area (112)
The raw material slurry secondary response of entrance；
Gas enters cyclone separator (21) after being reacted through gasification furnace (11), is cooled down through gasification furnace (11) lime-ash shock chamber (113)
Lime-ash afterwards enters grey dreg-locking hopper (12) and discharged afterwards；
Gas after being separated through cyclone separator (21) enters the useless pot (31) of coal gas, the solid after being separated through cyclone separator (21)
Into the first collection ash can (22)；
The saturated vapor that drum (32) comes is overheated into superheated steam, superheated steam one by the high-temperature gas that coal gas gives up in pot (31)
Divide and enter in two sections of the top assisted reaction area (112) of gasification furnace (11), a part is sent outside.
10. according to the coal-water slurry gasification described in claim 9, it is characterised in that enter two sections of top assisted reaction area
(112) raw material slurry accounts for 15~30% into gasification furnace (11) raw material slurry total amount.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108194909A (en) * | 2017-12-27 | 2018-06-22 | 太原理工大学 | A kind of whirlwind heat-exchanger rig and technique |
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Application publication date: 20170912 |