CN105176589A - Coke fixed bed pressurization gasification device and process - Google Patents
Coke fixed bed pressurization gasification device and process Download PDFInfo
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- CN105176589A CN105176589A CN201510659348.6A CN201510659348A CN105176589A CN 105176589 A CN105176589 A CN 105176589A CN 201510659348 A CN201510659348 A CN 201510659348A CN 105176589 A CN105176589 A CN 105176589A
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Abstract
The invention relates to the field of gasification of coke raw material high-temperature oxidized coal, in particular to a coke fixed bed pressurized gasification device and a process. The device comprises a gasifying agent mixer and a gasifier which are connected in the process flow, a pressure swing feeding lock hopper, an ash discharging lock hopper, a washing dust remover and a saturation tower; the gasifier is divided into an ash layer, an oxidation layer, a first reduction layer, a second reduction layer, a dry distillation layer and a drying layer from bottom to top; the upper part of the gasifier is sequentially connected with a washing dust remover and a saturation tower through a gas outlet. The gasification agent passes through each layer of the gasifier from bottom to top to generate coal gas through coal gasification reaction, and the coal gas is washed by water, transferred with heat and mass, and sent out after coal ash dust and impurities are removed. The equipment of the invention has reasonable structure, high efficiency, energy saving, environmental protection, no pollution, easy maintenance, small occupied area and investment saving, and has excellent industrial prospect and social benefit for developing coke pressurized gasification under the large background of serious surplus of productivity, lost coke products and low price of the current coking enterprises.
Description
Technical field
The present invention relates to coke raw material high temperature oxidation gasification field, be specifically related to a kind of coke fixed bed pressured gasification device and technique.
Background technology
At present, traditional coke granule fixed bed gasification technology (CGP, CoKeGasificationProcessoffixedBed) is that under adopting air/or adding steam normal pressure, the technology that coke gasification manufactures coal gas (carbon monoxide) is carried out in the circulation of high-temp combustion fixed-bed intermittent formula.In general, this type of coke gasification process unit is made up of coke bin, feed test tank, vapourizing furnace, grey hopper, fly-ash separator, waste heat boiler, air blower and auxiliary auxiliary facility thereof; Vaporized chemical mostly is air and water vapor, and pressure is close to normal pressure, and efficiency is low, energy consumption is high, big for environment pollution.Separately there is the lurgi gasifier of German LURGI, also be pressure gasification process, this technology just for the gasification of the fuel such as bituminous coal, brown coal, its vapourizing furnace is full water leg structure, complex structure, wastewater treatment difficulty, energy consumption are high, it is comparatively large to pollute, investment compared with high, maintenance difficulty is large.
Summary of the invention
The object of the present invention is to provide a kind of coke fixed bed pressured gasification device and technique, have now energy-efficient, pollution-free, environmental protection is good, flow process is simple, take up an area less, device structure rationally and the advantage of maintenance reduced investment.
A kind of coke fixed bed pressured gasification device provided by the invention, comprising: the vaporized chemical mixing tank that technical process is connected and gasifier, and transformation charging lock hopper, ash discharge lock hopper, scrubber and saturator;
Described gasifier is divided into grieshoch, zone of oxidation, the first reducing zone, the second reducing zone, destructive distillation layer and drying layer from bottom to top;
Described transformation charging lock hopper is connected by the opening for feed of charging stock tank with gasifier top, and the top of described transformation charging lock hopper is connected with coke bin, pressurized gas pipeline and release gas piping;
Described ash discharge lock hopper is connected with the bottom ash discharging hole of gasifier, and ash discharge lock hopper is transformation ash discharge tank, and arranges hydraulic pressure ash-valve;
Described gasifier top arranges pneumatic outlet, and is connected successively with scrubber, saturator by pneumatic outlet, has wear-resistant castable insulating lining in pneumatic outlet; Described scrubber and saturator are the mass-and heat-transfer equipment that air water fully contacts, and coal gas is sent at the top of saturator, and bottom is discharged waste water and sent to the reuse of grey water handing Posterior circle.
Further, ash discharge fire grate and vaporized chemical import is provided with bottom described gasifier;
Described ash discharge fire grate is the structure of a speed-changing rotation, evenly gas distribution and ash discharge, and adopting resistant and wear-resistant cast steel preparation, is multilayer polygonal sector structure, drives speed-changing rotation crush cinder by motor;
Described vaporized chemical import is annular porous distributed architecture, is connected with steam oxygen mixing tank by pipeline.
Further, described coke fixed bed pressured gasification device also comprises: drum;
Described gasifier is pressurized vessel, and its operating pressure is 0.5 ~ 5.0MPa; Described furnace wall, gasifier middle and lower part or all furnace wall adopt cooling water jecket, and the inwall of cooling water jecket adopts charcoal steel and stainless compound steel plate or stainless steel built-up welding, have the ability of absorbing thermal expansion amount, elimination thermal stress deformation;
When furnace wall, gasifier middle and lower part adopts cooling water jecket, the furnace wall, top of gasifier is the insulated lining of liner insulating refractory, and side towards the fire is in wear-resistant castable or the fire-resistant stiffener of heavy.
The top of described cooling water jecket arranges the steam outlet pipe be connected with drum, and the bottom of cooling water jecket arranges the water inlet pipe be connected with drum; Oiler feed enters cooling water jecket by thermogenesis steam, and the steam that cooling water jecket produces is sent as byproduct steam, uses as vapour source.
Further, described coke fixed bed pressured gasification device also comprises: being arranged on bottom, gasifier furnace wall has annular air scoop; Described annular air scoop is connected with steam-pipe, has flexible gasifier bed temperature function.
Annular air scoop can convenient and swift adjusting furnace temperature, improves capacity of equipment and transformation efficiency.
Further, described coke fixed bed pressured gasification device also comprises: the belljar valve distributor being arranged on described gasifier its top feed mouth place;
Described belljar valve distributor, by a vertical long valve rod Driven by Hydraulic Cylinder, can enter stove, belljar valve distributor surface overlaying wearable hard alloy by the smooth and easy coke pellet that is uniformly distributed, and can realize the sealing in gasifier.
Further, described coke fixed bed pressured gasification device also comprises: be arranged in the cloth conically shaped around described belljar valve distributor, can guarantee that furnace roof charge level is concentric(al) circles waveform horizontal distribution, upstream is evenly distributed, be conducive to coke gasification.
Further, the inlet and outlet of described transformation charging lock hopper is respectively equipped with hydraulic automatic flat-plate valve; Transformation charging lock hopper adopts list or twin-lock bucket to arrange, and arranges pressure equilibrium pipeline between lock hopper;
The inlet and outlet of described ash discharge lock hopper is respectively equipped with hydraulic automatic flat-plate valve, the interior wall liner abrasion-proof corrosion-proof backplate of ash discharge lock hopper.
Further, described scrubber is the Venturi air water washer of stainless steel, and described saturator is solid valve vertical tower plate structure vapour-liquid contacting column or waste heat boiler device, makes coal gas reach wet down, gives a dinner of welcome and water saturated object.
Present invention also offers a kind of coke fixed bed pressured gasification technique based on described device, comprise the following steps:
Vaporized chemical enters in gasifier after preheating mixing, from bottom to top by grieshoch, zone of oxidation, the first reducing zone, the second reducing zone, destructive distillation layer and drying layer;
Vaporized chemical absorbs sensible heat via grieshoch and heats up; In zone of oxidation, coke and O
2there is combustion reactions and generate CO
2, gas-solid temperature of charge continues to raise; Upstream enters the first reducing zone and the second reducing zone again, coke and high-temperature gas generation coal gasification reaction:
upstream heat absorption, temperature decline; Upstream by destructive distillation layer and drying layer, contacts with the cold coke pellet entering stove, derives after carrying out heat exchange from air outlet, gasifier top again;
The coal gas that gasifier is produced enters scrubber through outlet and mixes with washing water, and gas temperature reduces, and the coal ash dust simultaneously carried secretly in coal gas and other impurity are by water washing; After gas-water separation, coal gas enters saturator, and through water washing, heat and mass, in coal gas, coal ash dust and impurity wash removing further, and coal gas is saturated by water vapor institute simultaneously, sends after air water separator Separation of Water.
Further, described vaporized chemical is the gas mixture of oxygen and water vapor, or the gas mixture of oxygen, water vapor and carbonic acid gas; The lock hopper gas of described transformation charging lock hopper is the coal gas that finally obtains of this technique or rare gas element.
Utilize carbonic acid gas as vaporized chemical, coal gas, emissions reduction can be increased production; Use rare gas element as charging lock hopper pressurising gas, equipment can be saved, improve factor of created gase, reduce production cost.
Beneficial effect of the present invention is:
Device structure of the present invention is reasonable, energy-efficient, environment friendly and pollution-free, maintenance easily, take up an area less, reduced investment; This device gas washing dedusting sewage oil-containing and pollutent few, recycle, water and heat effectively utilize, energy-conservation, water saving; Therefore, the present invention is seriously superfluous in current coal chemical enterprise production capacity, under the overall background that coke product is unsalable, price is low, has fabulous industrial prospect and social benefit for exploitation coke pressurized gasification.
Accompanying drawing explanation
In order to be illustrated more clearly in the specific embodiment of the invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The process flow sheet of the coke fixed bed pressured gasification device that Fig. 1 provides for the embodiment of the present invention.
Reference numeral:
1-gasifier; 2-scrubber; 3-transformation charging lock hopper;
4-charging stock tank; 5-ash discharge lock hopper; 6-oxygen preheat device;
7-vaporized chemical mixing tank; 8-annular air scoop; 9-ash discharge fire grate;
10-drum; 11-saturator; 12-circulation cleaning pump;
13-cooling water jecket; 14-insulated lining; 15-pneumatic outlet;
The import of 16-vaporized chemical; 17-ash discharging hole; The thin grey lock hopper of 18-;
19-air water separator; 20-coke bin; 21-belljar valve distributor.
Embodiment
Be clearly and completely described technical scheme of the present invention below in conjunction with accompanying drawing, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
In describing the invention, it should be noted that, orientation or the position relationship of the instruction such as term " " center ", " on ", D score, "left", "right", " vertically ", " level ", " interior ", " outward " they be based on orientation shown in the drawings or position relationship; be only the present invention for convenience of description and simplified characterization; instead of instruction or imply the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as limitation of the present invention.In addition, term " first ", " second ", " the 3rd " only for describing object, and can not be interpreted as instruction or hint relative importance.
In describing the invention, it should be noted that, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or connect integratedly; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, particular case above-mentioned term concrete meaning in the present invention can be understood.
A kind of coke fixed bed pressured gasification device provided by the invention, comprising: technical process is connected vaporized chemical mixing tank and gasifier and transformation charging lock hopper, ash discharge lock hopper, scrubber and saturator.
Gasifier is divided into grieshoch, zone of oxidation, the first reducing zone, the second reducing zone, destructive distillation layer and drying layer from bottom to top; Transformation charging lock hopper is connected by the opening for feed of charging stock tank with gasifier top, and the top of described transformation charging lock hopper is connected with coke bin, pressurized gas pipeline and release gas piping; Ash discharge lock hopper is connected with the bottom ash discharging hole of gasifier, and ash discharge lock hopper is transformation ash discharge tank, and arranges hydraulic pressure ash-valve; Gasifier top arranges pneumatic outlet, and is connected successively with scrubber, saturator by pneumatic outlet, has wear-resistant castable insulating lining in pneumatic outlet; Described scrubber and saturator are the mass-and heat-transfer equipment that air water fully contacts, and coal gas is sent at the top of saturator, and bottom is discharged waste water and sent to the reuse of grey water handing Posterior circle.
During work, vaporized chemical enters in gasifier after preheating mixing, from bottom to top by grieshoch, zone of oxidation, the first reducing zone, the second reducing zone, destructive distillation layer and drying layer; Vaporized chemical absorbs sensible heat via grieshoch and heats up, at zone of oxidation coke and O
2there is combustion reactions and generate CO
2and continue to heat up; Upstream enters the first reducing zone and the second reducing zone, and coke and high-temperature gas generation coal gasification reaction also absorb heat, and upstream temperature declines, again by destructive distillation layer and drying layer, contact with the cold coke pellet entering stove, carry out heat exchange and obtain coal gas, derive from air outlet, gasifier top;
The coal gas that gasifier is produced enters scrubber through outlet and mixes with washing water, and gas temperature continues to reduce, and the coal ash dust simultaneously carried secretly in coal gas and other impurity are by water washing; After gas-water separation, coal gas enters saturator, and through water washing, heat and mass, in coal gas, coal ash dust and impurity wash removing further, and coal gas is saturated by water vapor institute simultaneously, sends after air water separator Separation of Water.
Vaporized chemical can be the gas mixture of oxygen and water vapor, also can be the gas mixture of oxygen, water vapor and carbonic acid gas.
The process flow sheet of the coke fixed bed pressured gasification device that Fig. 1 provides for the embodiment of the present invention.
As shown in Figure 1, gasifier 1 is divided into grieshoch, zone of oxidation, the first reducing zone, the second reducing zone, destructive distillation layer and drying layer from bottom to top.Ash discharge fire grate 9 and vaporized chemical import 16 is provided with bottom gasifier 1; The bottom ash discharging hole 17 of gasifier 1 is connected with ash discharge lock hopper 5, and ash discharge lock hopper is transformation ash discharge tank, and arranges hydraulic pressure ash-valve.Transformation charging lock hopper 3 is connected with the opening for feed at gasifier 1 top by charging stock tank 4, and the top of transformation charging lock hopper 3 is connected with coke bin 20, pressurized gas pipeline and release gas piping.Annular air scoop 8 is also had above bottom, gasifier 1 furnace wall, ash discharge fire grate 9.
Gasifier 1 its top feed mouth place also arranges the belljar valve distributor 21 be connected with charging stock tank 4; Described belljar valve distributor 21, by a vertical long valve rod Driven by Hydraulic Cylinder, can enter stove, belljar valve distributor 21 surface overlaying wearable hard alloy by the smooth and easy coke pellet that is uniformly distributed, and energy tight closing gasifier 1, gas pressure is not leaked.
Gasifier 1 is pressurized vessel, and its operating pressure is 0.5 ~ 5.0MPa; The furnace wall, middle and lower part of gasifier 1 adopts cooling water jecket 13, and the inwall of cooling water jecket 13 adopts charcoal steel and stainless compound steel plate or stainless steel built-up welding, has the ability of absorbing thermal expansion amount, elimination thermal stress deformation; The furnace wall, top of gasifier 1 is the insulated lining 14 of liner insulating refractory, and side towards the fire is in wear-resistant castable or the fire-resistant stiffener of heavy.
The top of cooling water jecket 13 arranges the steam outlet pipe be connected with drum 10, and the bottom of cooling water jecket 13 arranges the water inlet pipe be connected with drum 10; Oiler feed enters cooling water jecket by thermogenesis steam, and the steam that cooling water jecket produces is sent as byproduct steam, uses as vapour source.
Oxygen channel is connected with oxygen preheat device 6, vaporized chemical mixing tank 7 successively, and steam-pipe is connected with annular air scoop 8, vaporized chemical mixing tank 7 and ash discharge lock hopper 5 respectively.The outlet of vaporized chemical mixing tank 7 is connected with described vaporized chemical import 16.
Gasifier 1 top arranges pneumatic outlet 15, and is connected successively with scrubber 2, saturator 11 by pneumatic outlet 15; The mass-and heat-transfer equipment that scrubber 2 fully contacts for air water with saturator 11, coal gas is sent at the top of saturator, and waste water is discharged in bottom.The bottom of saturator 11 is connected to the top of scrubber 2 by pipeline and circulation cleaning pump 12, realize the recycle of washing water.
The top of saturator 11 can pass into high temperature phlegma or gasification reuse water as saturation water; The top of saturator 11 is connected with air water separator by pipeline, and outwards sends the coal gas finally obtained; The bottom of saturator 11 arranges waste pipe, returns and recycle after waste water being delivered to grey water handing.
In a preferred embodiment of the invention, ash discharge fire grate 9 can be ventilated for speed-changing rotation, the structure of evenly gas distribution and ash discharge, and adopting resistant and wear-resistant cast steel preparation, is multilayer polygonal sector structure, drives speed-changing rotation crush cinder by motor.
In a preferred embodiment of the invention, vaporized chemical import 16 is annular porous distributed architecture.
In a preferred embodiment of the invention, can also layout cloth conically shaped around belljar valve distributor 21, can guarantee that furnace roof charge level is concentric(al) circles waveform horizontal distribution, upstream is evenly distributed, is conducive to coke gasification.
In a preferred embodiment of the invention, the inlet and outlet of transformation charging lock hopper 3 is respectively equipped with hydraulic automatic flat-plate valve; Transformation charging lock hopper 3 is monolock bucket, or adopts twin-lock bucket to arrange, and arranges pressure equilibrium pipeline between lock hopper; The inlet and outlet of ash discharge lock hopper 5 is respectively equipped with hydraulic automatic flat-plate valve, the interior wall liner abrasion-proof corrosion-proof backplate of ash discharge lock hopper 5.
In a preferred embodiment of the invention, scrubber 2 is the Venturi air water washer of stainless steel, and saturator 11 is solid valve vertical tower plate structure vapour-liquid contacting column or waste heat boiler device, makes coal gas reach wet down, gives a dinner of welcome and water saturated object.
In a preferred embodiment of the invention, the inwall of gasifier 1 all can also adopt cooling water jecket structure.
Gasifying process based on described coke fixed bed pressured gasification device provided by the invention is:
Oxygen after preheating with vapor mixing, enter each fuel bed in gasifier 1 by vaporized chemical import 16.Gas is the immovable bed such as destructive distillation layer and drying layer from bottom to top; Vaporized chemical absorbs sensible heat raised temperature via grieshoch and reaches 260 DEG C ~ 350 DEG C; Through zone of oxidation, coke and oxygen generation combustion reactions generate CO
2, gas-solid temperature of charge is increased to rapidly 1000 ~ 1100 DEG C; Upstream enters the first reducing zone, the second reducing zone, coke and high-temperature gas generation coal gasification reaction:
this reaction is thermo-negative reaction, bed and upstream temperature drop to 550 ~ 600 DEG C, upstream is again by destructive distillation layer and drying layer, namely contact with the cold coke pellet entering stove, carry out heat exchange temperature and drop to 500 ~ 550 DEG C, derive from gasifier top gas outlet 15, cold coke is heated in destructive distillation layer and drying layer and gas effect is stored in a small amount of fugitive constituent of coke and moisture effusion enters upstream and walks with the export coal band of gas.
Feeding density charcoal crushing and screening is 5 ~ 25mm and 25 ~ 50mm, two kinds of particles, store in coke bin 20, by being metered into transformation charging lock hopper 3, add charging stock tank 4 and gasifier 1 in chronological order, reverse and dynamic with upstream, pass downwardly through drying layer, destructive distillation layer, the first reducing zone, the second reducing zone, zone of oxidation and grieshoch, enter ash discharge lock hopper 5 through ash discharge fire grate 9, ash discharging hole 17, lime-ash is arranged from ash discharge lock hopper 5 end opening self-acting valve.
The coal gas that gasifier 1 is produced enters scrubber 2 through pneumatic outlet 15, mix with the washing water of circulation cleaning pump 12, gas temperature is subject to thermal evaporation with water, temperature is reduced to 200 ~ 250 DEG C, the coal ash dust of gas entrainment simultaneously and other impurity are by water washing, after gas-water separation, coal gas enters saturator 11, the vertical tower tray that coal gas is arranged in tower by saturator 11 bottom air inlet fully contacts with the washing water that tower top gets off, coal gas is through water washing, heat and mass, in coal gas, dirt and impurity wash removing further, coal gas is saturated by water vapor institute simultaneously, send after air water separator 19 Separation of Water.
Vaporized chemical is the gas mixture of oxygen and water vapor, or the gas mixture of oxygen, water vapor and carbonic acid gas; The lock hopper gas of transformation charging lock hopper is the coal gas that finally obtains of this technique or rare gas element.
Device structure of the present invention is reasonable, energy-efficient, environment friendly and pollution-free, maintenance easily, take up an area less, reduced investment; This device gas washing dedusting sewage oil-containing and pollutent few, recycle, water and heat effectively utilize, energy-conservation, water saving.
Last it is noted that above each embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to foregoing embodiments to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein some or all of technical characteristic; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (10)
1. a coke fixed bed pressured gasification device, is characterized in that, comprising: the vaporized chemical mixing tank that technical process is connected and gasifier, and transformation charging lock hopper, ash discharge lock hopper, scrubber and saturator;
Described gasifier is divided into grieshoch, zone of oxidation, the first reducing zone, the second reducing zone, destructive distillation layer and drying layer from bottom to top;
Described transformation charging lock hopper is connected by the opening for feed of charging stock tank with gasifier top, and described transformation charging lock hopper is connected with coke bin, pressurized gas pipeline and release gas piping;
Described ash discharge lock hopper is connected with the bottom ash discharging hole of gasifier, and ash discharge lock hopper is transformation ash discharge tank;
Described gasifier top arranges pneumatic outlet, and is connected successively with scrubber, saturator by pneumatic outlet; Described scrubber and saturator are the mass-and heat-transfer equipment that air water fully contacts, and coal gas is sent at the top of saturator, and waste water is discharged in bottom.
2. coke fixed bed pressured gasification device according to claim 1, is characterized in that, is provided with ash discharge fire grate and vaporized chemical import bottom described gasifier;
Described ash discharge fire grate is the structure of a speed-changing rotation, evenly gas distribution and ash discharge, is multilayer polygonal sector, drives speed-changing rotation crush cinder by motor;
Described vaporized chemical import is annular porous distributed architecture, is connected with steam oxygen mixing tank by pipeline.
3. coke fixed bed pressured gasification device according to claim 1, is characterized in that, also comprise: drum;
Described gasifier is pressurized vessel, and its operating pressure is 0.5 ~ 5.0MPa; Described furnace wall, gasifier middle and lower part or all furnace wall adopt cooling water jecket, and the inwall of cooling water jecket adopts charcoal steel and stainless compound steel plate or stainless steel built-up welding, have the ability of absorbing thermal expansion amount, elimination thermal stress deformation;
The top of described cooling water jecket arranges the steam outlet pipe be connected with drum, and the bottom of cooling water jecket arranges the water inlet pipe be connected with drum; Oiler feed enters cooling water jecket by thermogenesis steam, and the steam that cooling water jecket produces is sent as byproduct steam, uses as vapour source.
4. coke fixed bed pressured gasification device according to claim 1, is characterized in that, also comprise: the annular air scoop being arranged on bottom, gasifier furnace wall; Send into steam in described annular air scoop, there is flexible gasifier bed temperature function.
5. coke fixed bed pressured gasification device according to claim 1, is characterized in that, also comprise: the belljar valve distributor being arranged on described gasifier its top feed mouth place;
Described belljar valve distributor, by a vertical long valve rod Driven by Hydraulic Cylinder, can enter stove, belljar valve distributor surface overlaying wearable hard alloy by the smooth and easy coke pellet that is uniformly distributed, and can realize the sealing in gasifier.
6. coke fixed bed pressured gasification device according to claim 5, is characterized in that, also comprise: be arranged in the cloth conically shaped around described belljar valve distributor, can guarantee that furnace roof charge level is concentric(al) circles waveform horizontal distribution.
7. coke fixed bed pressured gasification device according to claim 1, is characterized in that: the inlet and outlet of described transformation charging lock hopper is respectively equipped with hydraulic automatic flat-plate valve; Transformation charging lock hopper adopts list or twin-lock bucket to arrange, and arranges pressure equilibrium pipeline between lock hopper;
The inlet and outlet of described ash discharge lock hopper is respectively equipped with hydraulic automatic flat-plate valve, the interior wall liner abrasion-proof corrosion-proof backplate of ash discharge lock hopper.
8. coke fixed bed pressured gasification device according to claim 1, it is characterized in that, described scrubber is the Venturi air water washer of stainless steel, described saturator is solid valve vertical tower plate structure vapour-liquid contacting column or waste heat boiler device, makes coal gas reach wet down, gives a dinner of welcome and water saturated object.
9., based on a coke fixed bed pressured gasification technique for device described in any one of claim 1 ~ 8, it is characterized in that, comprise the following steps:
Vaporized chemical enters in gasifier after preheating mixing, from bottom to top by grieshoch, zone of oxidation, the first reducing zone, the second reducing zone, destructive distillation layer and drying layer;
Vaporized chemical absorbs sensible heat via grieshoch and heats up; In zone of oxidation, coke and O
2there is combustion reactions and generate CO
2, gas-solid temperature of charge continues to raise; Upstream enters the first reducing zone and the second reducing zone again, coke and high-temperature gas generation coal gasification reaction:
upstream heat absorption, temperature decline; Upstream by destructive distillation layer and drying layer, contacts with the cold coke pellet entering stove, derives after carrying out heat exchange from air outlet, gasifier top again;
The coal gas that gasifier is produced enters scrubber through outlet and mixes with washing water, and gas temperature reduces, and the coal ash dust simultaneously carried secretly in coal gas and other impurity are by water washing; After gas-water separation, coal gas enters saturator, and through water washing, heat and mass, in coal gas, coal ash dust and impurity wash removing further, and coal gas is saturated by water vapor institute simultaneously, sends after air water separator Separation of Water.
10. based on a coke fixed bed pressured gasification technique according to claim 9, it is characterized in that, described vaporized chemical is the gas mixture of oxygen and water vapor, or the gas mixture of oxygen, water vapor and carbonic acid gas; The lock hopper gas of described transformation charging lock hopper is the coal gas that finally obtains of this technique or rare gas element.
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| CN106190318A (en) * | 2016-08-03 | 2016-12-07 | 赛鼎工程有限公司 | A kind of Processes and apparatus of coke gasification |
| CN106221807A (en) * | 2016-08-03 | 2016-12-14 | 赛鼎工程有限公司 | A kind of coke gasification produces the method and apparatus of coal gas |
| CN106318467A (en) * | 2016-11-18 | 2017-01-11 | 北京金泰瑞和工程科技有限公司 | Gasification reactor and gasification system |
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| CN106398773A (en) * | 2016-11-18 | 2017-02-15 | 北京金泰瑞和工程科技有限公司 | Pressurized gasification system for fixed bed |
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| CN106544058A (en) * | 2017-01-24 | 2017-03-29 | 北京金泰瑞和工程科技有限公司 | Fixed bed pressured gasification system |
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