CN207108930U - Coal water slurry gasification system - Google Patents
Coal water slurry gasification system Download PDFInfo
- Publication number
- CN207108930U CN207108930U CN201720770621.7U CN201720770621U CN207108930U CN 207108930 U CN207108930 U CN 207108930U CN 201720770621 U CN201720770621 U CN 201720770621U CN 207108930 U CN207108930 U CN 207108930U
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- ash
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- gas
- coal gas
- subsider
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- 238000002309 gasification Methods 0.000 title claims abstract description 135
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 120
- 239000002002 slurry Substances 0.000 title claims abstract description 74
- 239000003245 coal Substances 0.000 title claims abstract description 59
- 239000003034 coal gas Substances 0.000 claims abstract description 110
- 238000006243 chemical reaction Methods 0.000 claims abstract description 91
- 230000035939 shock Effects 0.000 claims abstract description 26
- 238000011084 recovery Methods 0.000 claims abstract description 17
- 239000007789 gas Substances 0.000 claims description 88
- 238000005201 scrubbing Methods 0.000 claims description 38
- 238000006392 deoxygenation reaction Methods 0.000 claims description 30
- 238000000034 method Methods 0.000 claims description 27
- 238000005406 washing Methods 0.000 claims description 25
- 239000002918 waste heat Substances 0.000 claims description 19
- 239000010797 grey water Substances 0.000 claims description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 7
- 239000001301 oxygen Substances 0.000 claims description 7
- 229910052760 oxygen Inorganic materials 0.000 claims description 7
- 238000004891 communication Methods 0.000 claims description 3
- 239000000428 dust Substances 0.000 claims description 3
- 239000003250 coal slurry Substances 0.000 abstract description 8
- 238000005516 engineering process Methods 0.000 abstract description 6
- 239000002956 ash Substances 0.000 description 95
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 26
- 239000002994 raw material Substances 0.000 description 20
- 239000007788 liquid Substances 0.000 description 15
- 230000004044 response Effects 0.000 description 15
- 238000000926 separation method Methods 0.000 description 14
- 239000007787 solid Substances 0.000 description 13
- 239000003795 chemical substances by application Substances 0.000 description 11
- 230000008569 process Effects 0.000 description 9
- 239000000203 mixture Substances 0.000 description 8
- 239000006227 byproduct Substances 0.000 description 7
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- 238000001816 cooling Methods 0.000 description 6
- 239000002737 fuel gas Substances 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- 229910052799 carbon Inorganic materials 0.000 description 5
- 238000002485 combustion reaction Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 229920006395 saturated elastomer Polymers 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- 239000010883 coal ash Substances 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000007921 spray Substances 0.000 description 4
- 238000000889 atomisation Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 239000002893 slag Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 239000002802 bituminous coal Substances 0.000 description 2
- 239000003818 cinder Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007701 flash-distillation Methods 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000013021 overheating Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000010410 dusting Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000003077 lignite Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000002006 petroleum coke Substances 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000008234 soft water Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Classifications
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
Landscapes
- Industrial Gases (AREA)
Abstract
The utility model provides a kind of coal water slurry gasification system, is related to Coal Gasification Technology field.The system includes gasification unit, including gasification furnace and grey dreg-locking hopper；One section of the bottom main reaction region, two sections of top assisted reaction area and lime-ash shock chamber, lime-ash shock chamber that gasification furnace includes connection are connected with grey dreg-locking hopper；Separative element, including cyclone separator and the first collection ash can；Heat recovery unit, including coal gas give up pot, drum and second collection ash can；Drum connects with the tubulation in the useless pot of coal gas；The gas outlet of cyclone separator connects with the air inlet of the useless pot of coal gas；The useless pot of coal gas is provided with exhaust outlet；A superheated steam part caused by the useless pot of coal gas is passed through two sections of top assisted reaction area inlet port, and a part communicates with the external world.The utility model alleviates that traditional coal slurry gasification system efficiency of utilization is high and the caused relatively low problem of calorific value of gas, sets whole system flow efficiency of utilization high by Tthe utility model system each unit and can realize the controllable adjustment to caused calorific value of gas.
Description
Technical field
Coal Gasification Technology field is the utility model is related to, in particular to a kind of coal water slurry gasification system.
Background technology
Coal Gasification refers to make raw material with coal, and to produce industrial fuel gas, 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 is very extensive, 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, and in scrubbing tower, 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, 1300 DEG C or so of coal gas of high temperature is produced in combustion chamber and is directly cooled to 260 DEG C with water Quench so that be 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 is not all recycled effectively 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, on this condition caused coal gas
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 and coal slurry atomizing effect is bad,
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 utility model.
Utility model content
The purpose of this utility model 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 are reclaimed using useless pot, can be obtained
To superheated steam, partly react personal for gasification furnace, 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 caused high-temperature gas sensible heat is as thermal source after the reaction of lower reaction zone, and on top, reaction zone adds
Entering raw material and carry out secondary response so that available gas composition improves 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 caused calorific value of gas
Section.
In order to realize above-mentioned purpose of the present utility model, 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 coal gas give up pot, drum and 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 connect with the tubulation in the useless pot of the coal gas；The cyclone separator goes out
Gas port connects with the air inlet of the useless pot of the coal gas；The useless pot of the coal gas is provided with exhaust outlet；
A coal gas superheated steam part caused by pot of giving up is passed through the inlet port in the two sections of assisted reaction areas in top, and one
Part communicates with the external world.
Further, on the basis of technical solutions of the utility model, the useless pot of coal gas includes housing, waste heat heat exchanging pipe and steaming
Vapour overheats 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 connects 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 communicate with the external world；
The lower housing portion is provided with separated space, for gas ash content from.
Preferably, on the basis of technical solutions of the utility model, the one section of main reaction region in bottom side is at least relative
A pair of nozzles is set.
Further, on the basis of technical solutions of the utility model, the coal water slurry gasification system also includes：Washing is single
Member, the exhaust outlet of the useless pot of the coal gas connect with the washing unit.
Preferably, the washing unit includes scrubbing tower, the air inlet of the exhaust outlet and the scrubbing tower of the useless pot of the coal gas
Mouth connection.
Further, on the basis of technical solutions of the utility model, the coal water slurry gasification system also includes：Grey water process
Unit, the grey unit for treating water include flash tank, subsider, ash water tank and mortar-trough；
The flash tank connects 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 connects with the flash tank, and the upper outlet of the subsider connects with the ash water tank, and the bottom of the subsider goes out
Mouth connects with the mortar-trough；
The first collection ash can and the second collection ash can connect with the subsider.
Further, on the basis of technical solutions of the utility model, the grey unit for treating water also includes deoxygenation tank, divided
From tank 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 connects；
The heat exchanger connects 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 solutions of the utility model, the washing unit is dry-method dust-removal device.
Further, on the basis of technical solutions of the utility model, the coal water slurry gasification system also includes：Subsider；
The dry-method dust-removal device connects with the subsider；
The first collection ash can and the second collection ash can connect with the subsider.
Further, on the basis of technical solutions of the utility model, the coal water slurry gasification system also includes：Ash water tank and
Mortar-trough；
The upper outlet of the subsider connects with the ash water tank, the lower part outlet of the subsider and the mortar-trough
Connection.
The technical process of the coal water slurry gasification system is as follows：
Raw material slurry is entered in one section of the bottom main reaction region of gasification furnace with gasifying agent by nozzle to react, 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 gasification furnace reacts, and the lime-ash after slag from gasifying furnace shock chamber cools down enters ash charge
Discharged after dreg-locking hopper；
Gas after cyclone separator separates enters the useless pot of coal gas, and the solid after cyclone separator separates enters first
Collect ash can；
The saturated vapor that drum comes is overheated into superheated steam, a superheated steam part by the high-temperature gas in the useless pot of coal gas
In two sections of the top assisted reaction area for entering gasification furnace, a part is sent outside.
Preferably, the raw material slurry into two sections of top assisted reaction area account for 15 into gasification furnace raw material slurry total amount~
30%.
Compared with the prior art, the utility model has the advantages that：
(1) coal water slurry gasification system provided by the utility model includes gasification unit, separative element and heat recovery unit,
The gasification furnace of gasification unit is two stage gasifier, and caused high-temperature gas sensible heat is as thermal source after the reaction of lower reaction zone, upper
Portion's reaction zone adds slurry and carries out secondary response so that available gas composition improves in gas, while is reacted by adjusting top
The addition of area's raw material can realize the regulation that methane gas content is produced to secondary response, so as to realize to caused coal gas heat
The controllable adjustment of value.The coal gas of high temperature of gasification furnace is recycled by heat recovery unit, after dry method gas solid separation, profit
A large amount of sensible heats of high-temperature gas are reclaimed with useless pot, and by-product obtains superheated steam, partly reenters gasification furnace and promotes secondary counter
Should, partly send outside, whole flow process efficiency of utilization is high.
(2) the utility model utilizes two-period form gasification furnace, and coal gas of high temperature sensible heat caused by first paragraph can be used as second segment
The thermal source of secondary response, second segment add after slurry carries out secondary response and produce hydrogen and methane gas again so that in coal gas
Available gas composition and calorific value significantly improve.
(3) the utility model adds the addition of slurry by adjusting gasification furnace second segment again, can realize to producing
The regulation of methane gas content in coal gas, so as to realize the controllable adjustment to producing calorific value of gas so that caused coal gas can
It is used as different purposes, using in different industries, coal gas is applied widely.
Brief description of the drawings
, below will be right in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
The required accompanying drawing used is briefly described in embodiment or description of the prior art, it should be apparent that, describe below
In accompanying drawing be some embodiments of the present utility model, for those of ordinary skill in the art, do not paying creativeness
On the premise of work, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is a kind of structural representation of the coal water slurry gasification system of embodiment of the utility model；
Fig. 2 is gasification unit structural representation in a kind of coal water slurry gasification system of embodiment of the utility model；
Heat recovery unit structural representation in a kind of coal water slurry gasification system of embodiment of Fig. 3 the utility model；
Fig. 4 is the knot of scrubbing tower and grey unit for treating water in a kind of coal water slurry gasification system of embodiment of the utility model
Structure schematic diagram；
Fig. 5 is the structural representation of the coal water slurry gasification system of the utility model embodiment one；
Fig. 6 is the structural representation of the coal water slurry gasification system of the utility model embodiment 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
The technical solution of the utility model is clearly and completely described below in conjunction with accompanying drawing, it is clear that described
Embodiment is the utility model part of the embodiment, rather than whole embodiments.Based on the embodiment in the utility model, sheet
The every other embodiment that field those of ordinary skill is obtained under the premise of creative work is not made, belongs to this practicality
Novel protected scope.
, it is necessary to explanation, the orientation of the instruction such as term " on ", " under ", " interior ", " outer " in description of the present utility model
Or position relationship is based on orientation shown in the drawings or position relationship, is for only for ease of description the utility model and simplification is retouched
State, rather than instruction or imply signified device or element there must be specific orientation, with specific azimuth configuration and operation,
Therefore it is not intended that to limitation of the present utility model.In addition, term " first ", " second ", " the 3rd " are only used for describing purpose,
And it is not intended that instruction or hint relative importance.
The utility model provides a kind of coal water slurry gasification system, and Fig. 1 is a kind of water coal of embodiment of the utility model
Starch the structural representation of gasification system；Fig. 2 is gasification unit in a kind of coal water slurry gasification system of embodiment of the utility model
Structural representation；The structure of heat recovery unit is shown in a kind of coal water slurry gasification system of embodiment of Fig. 3 the utility model
It is intended to；Fig. 4 is the structure of scrubbing tower and grey unit for treating water in a kind of coal water slurry gasification system of embodiment of the utility model
Schematic diagram.
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 cyclone separator 21 and first collect ash can 22；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 coal gas give up pot 31, drum 32 and second collect ash can 33；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 connects with the tubulation in the useless pot 31 of coal gas；The outlet of cyclone separator 21
Mouth connects with the air inlet of the useless pot 31 of coal gas；The useless pot 31 of coal gas is provided with exhaust outlet；Superheated steam one caused by the useless pot 31 of coal gas
Divide the inlet port for being passed through the two sections of assisted reaction areas 112 in top, a part communicates with the external world.
Gasification furnace 11 in the utility model is two-stage gasifier, includes one section of the bottom He of main reaction region 111 of connection
Two sections of top assisted reaction area 112, raw material slurry can be pressurizeed by shurry pump 13, together with gasifying agent under gasification furnace 11
One section of portion 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 adds is purity oxygen, and two sections of top aids in
The gasifying agent that reaction zone adds 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 improves in coal gas, while with
The reduction of temperature, also largely produces methane gas so that calorific value of gas is significantly improved.
Gasification furnace 11 uses two stage gasification, utilizes the material of the sensible heat gasification second segment supplement spray 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 advantageous to improve 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, it is less without harmful substance, environmental pollutions such as tar, phenol in waste water.
, 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 caused calorific value of gas.
When the coal gas of production is used to synthesize the chemical products such as 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 levels so that coal gas is more suitable for producing chemical products, 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 utility model can realize the regulation to the methane gas content in caused coal gas so that caused coal gas energy
Enough it is used 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 caused cinder enters lime-ash shock chamber 113 after gasification furnace 11 reacts, ash
Slag shock chamber 113 establishes 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 advantageous 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, realizes the recycling of a large amount of sensible heats of the high-temperature gas exported to gasification furnace 11, the mistake of by-product
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 bottom of pot 31 of giving up, the gas temperature after separating 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 is not reclaimed effectively to substantial amounts of gas sensible heat and steam latent heat
Utilize, efficiency of utilization is not high and the calorific value of gas of existing coal water slurry gasification technology production is relatively low, it is impossible to makes as fuel gas
With.
Coal water slurry gasification system provided by the utility model includes gasification unit, separative element and heat recovery unit, gas
The gasification furnace for changing unit is two stage gasifier, and caused high-temperature gas sensible heat is as thermal source after the reaction of lower reaction zone, on top
Reaction zone adds slurry and carries out secondary response so that and available gas composition improves in gas, while by adjusting top reaction zone
The addition of raw material can realize the regulation that methane gas content is produced to secondary response, so as to realize to caused calorific value of gas
Controllable adjustment.The coal gas of high temperature of gasification furnace is recycled by heat recovery unit, after dry method gas solid separation, utilized
A large amount of sensible heats of useless pot recovery high-temperature gas, and by-product obtains superheated steam, partly reenters gasification furnace and promotes secondary response,
Part is sent outside, and 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 connects with the bottom of drum 32, and drain pipe connects 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 connects with drum 32, an escape pipe part and two sections of top assisted reaction area
112 inlet port connection, a part communicate 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 generates 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 overheating 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 in housing and steam superheating tubulation to the heat of raw gas/unstripped gas
Effect utilizes, waste heat recovery efficiency high, and byproduct steam taste is high.
In a preferred embodiment, the one section of main reaction region 111 in bottom side is at least oppositely arranged a pair of nozzles.
Preferably, the one section of main reaction region 111 in bottom both 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 bad, 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 both ends of one section of gasification furnace bottom main reaction region enter, and are allowed to mutually hit atomization, and atomizing effect is good, and coal fills with gasifying agent reaction
Point, gasification efficiency is high, and efficiency of carbon con version is high.
In a preferred embodiment, the coal water slurry gasification system also includes：Washing unit 40, washing unit
40, the exhaust outlet of the useless pot 31 of coal gas connects with washing unit 40.
As a preferred embodiment, washing unit 40 includes scrubbing tower 41, the exhaust outlet of the useless pot 31 of coal gas is with washing
Wash the air inlet connection of 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 make coal gas decreasing temperature and increasing humidity, realize 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.
As a preferred embodiment, the coal water slurry gasification system also includes：Grey unit for treating water 50, at buck
Reason unit 50 includes flash tank 51, subsider 53, ash water tank 54 and mortar-trough 55；
Flash tank 51 connects 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 connects, and the upper outlet of subsider 53 connects with ash water tank 54, and lower part outlet and the mortar-trough 55 of subsider 53 connect
It is logical；First collection ash can 22 and second collects ash can 33 and connected with subsider 53.
The water that water and lime-ash shock chamber 113 are sent out of giving a dinner of welcome in scrubbing tower 41 is sent to flash tank 51 by pipeline.
Flash tank 51 is a kind of by depressurizing the container for boiling form again and being discharged the on-condensible gas incorporated in liquid, reality
Existing liquid release fixed gas, cooling and the purpose containing solid concentration.Concentration buck after flash distillation is sent into subsider 53 by pipeline.
Subsider 53 is a kind of equipment for being separated the fixation in liquid by gravitational settling, the concentrate of its bottom
Outwards output, the lime-ash that the first collection ash can 22 and second collects in ash can 33 enter 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 connects with the scrubbing tower 41 and knockout drum 52 respectively；Flash tank 51 passes sequentially through heat exchanger 57 and divided
Connected from after tank 52 with subsider 53.
Deoxygenation tank 56 be it is a kind of using low-pressure steam heating system water so as to reduce the equipment of 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 uses after heating for the washings of scrubbing tower 41, and realization recycles.
Steam after flash tank 51 flashes is sent into heat exchanger 57 as thermal source, for heating the deaerated water after deoxygenation,
Steam after heat exchange realizes gas-liquid separation by knockout drum 52, and liquid is sent into subsider 53 and handled.
As another preferred embodiment, washing unit 40 is dry-method dust-removal device.
Conventional nonaqueous dust cleaner can be selected in dry-method dust-removal device.
Supporting coal water slurry gasification system also includes with dry-method dust-removal device：Subsider 53, ash water tank 54 and mortar-trough 55；
Dry-method dust-removal device connects with subsider 53；
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 connect 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, such as：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.
From coal gas give up pot coal gas purified by dry-method dust-removal device after carry out follow-up settlement treatment, it is net using dry method
Change mode post-processing is more convenient, and device therefor is few, efficiency high.
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 are relatively set with a pair of sprays
Mouth, two nozzles are opposed to spraying 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 cyclone separator 21 and first collect ash can 22；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 coal gas give up pot 31, drum 32 and second collect ash can 33；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 connects with the tubulation in the useless pot 31 of coal gas；The outlet of cyclone separator 21
Mouth connects with the air inlet of the useless pot 31 of coal gas；The useless pot 31 of coal gas is provided with exhaust outlet；Superheated steam one caused by the useless pot 31 of coal gas
Divide the inlet port for being passed through the two sections of assisted reaction areas 112 in top, a part communicates with the external world.
Washing unit 40, washing unit 40 include 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 connects 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 connects with ash water tank 54, sinks
The lower part outlet of drop groove 53 connects with mortar-trough 55；First collection ash can 22 and second collects ash can 33 and 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 connects with the 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 connect with the middle part of drum 32；Steam superheating tubulation 313 is arranged in housing 311 and is located 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 connects with drum 32, an escape pipe part and
The inlet port connection in two sections of top assisted reaction area 112, a part communicate 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
Both 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 move 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 again with carbon produces H2And CH4Gas.Gasification furnace 11, which is sent out, at 1000 DEG C or so enters cyclonic separation
Device 21, gas solid separation is realized in cyclone separator 21, 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.Caused cinder enters lime-ash shock chamber after one section of 11 bottom of gasification furnace main reaction region 111 is reacted
113, liquid level is established 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 overheating 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 bottom of pot 31 of giving up, the gas temperature after separating 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 51 grey water section of flash tank flashes to steam, and steam is sent to heat exchanger 57, for heat from
The deaerated water that deoxygenation water pump 59 is sent, it is sent in scrubbing tower 41 and uses afterwards, the steam after exchanging heat is real by knockout drum 52
Existing gas-liquid separation, the liquid separated are 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 on drop groove 53 top 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 both 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, by the use of coal gas of high temperature sensible heat caused by the main reaction region of one section of bottom, as thermal source, raw material is added again at vertical section
Secondary response is carried out, additionally generates H2So that available gas composition improves in coal gas, while can produce methane gas 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 caused calorific value of gas carry out controllable adjustment；
4th, the coal gas of high temperature come out from gasification furnace, by dry method gas solid separation, coal gas of high temperature is reclaimed 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, and the system washing unit 40 unlike embodiment one is nonaqueous dust cleaner, at buck
Reason unit 50 includes：Subsider 53, ash water tank 54 and mortar-trough 55；First collection ash can 22 and second collects ash can 33 and states subsider
53 connections；The upper outlet of subsider 53 connects with ash water tank 54, and the lower part outlet of subsider 53 connects with mortar-trough 55.
After the embodiment replaces 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 being described the utility model, but will be appreciated that without departing substantially from this practicality
Many other change and modification can be made in the case of new spirit and scope.It is, therefore, intended that in appended right
It is required that include belonging to all such changes and modifications in the scope of the utility model.
Claims (10)
- A kind of 1. 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) side and be provided with nozzle, 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 coal gas give up pot (31), drum (32) and 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) connects with the air inlet of the useless pot (31) of the coal gas；The coal gas Useless pot (31) is provided with exhaust outlet；A coal gas superheated steam part caused by pot (31) of giving up is passed through the entrance of the two sections of assisted reaction areas (112) in top Mouthful, a part communicates 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 connect with the drum (32) bottom, 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 connects 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 communicates 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 also wraps Include：Washing unit (40), the give up exhaust outlet of pot (31) of the coal gas connect with the washing unit (40).
- 5. according to the coal water slurry gasification system described in claim 4, it is characterised in that the washing unit (40) includes scrubbing tower (41), the exhaust outlet of the useless pot (31) of the coal gas connects with the air inlet of the scrubbing tower (41).
- 6. according to the coal water slurry gasification system described in claim 5, 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) include 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) connects with the mortar-trough (55)；The first collection ash can (22) and the second collection ash can (33) connect with the subsider (53).
- 7. according to the coal water slurry gasification system described in claim 6, 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) connects 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).
- 8. according to the coal water slurry gasification system described in claim 4, it is characterised in that the washing unit (40) is dry method dust Device.
- 9. according to the coal water slurry gasification system described in claim 8, it is characterised in that the coal water slurry gasification system also includes： Subsider (53)；The dry-method dust-removal device connects with the subsider (53)；The first collection ash can (22) and the second collection ash can (33) connect with the subsider (53).
- 10. according to the coal water slurry gasification system described in claim 9, it is characterised in that the coal water slurry gasification system also includes： Ash water tank (54) and mortar-trough (55)；The upper outlet of the subsider (53) connects with the ash water tank (54), the lower part outlet of the subsider (53) and institute State mortar-trough (55) connection.
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| CN201720770621.7U CN207108930U (en) | 2017-06-28 | 2017-06-28 | Coal water slurry gasification system |
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| CN107151567A (en) * | 2017-06-28 | 2017-09-12 | 北京金泰瑞和工程科技有限公司 | Coal water slurry gasification system and its technique |
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