CN104611063B - A kind of airflow bed gasification furnace - Google Patents
A kind of airflow bed gasification furnace Download PDFInfo
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- CN104611063B CN104611063B CN201510004604.8A CN201510004604A CN104611063B CN 104611063 B CN104611063 B CN 104611063B CN 201510004604 A CN201510004604 A CN 201510004604A CN 104611063 B CN104611063 B CN 104611063B
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- outer tube
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/46—Gasification of granular or pulverulent flues in suspension
- C10J3/48—Apparatus; Plants
- C10J3/485—Entrained flow gasifiers
Abstract
The present invention discloses a kind of airflow bed gasification furnace, it is related to gasification furnace technical field, solve when carrying out gasification reaction using airflow bed gasification furnace of the prior art, combustion parts hydrogen is needed to be preheated, and semicoke is not utilized effectively, so as to cause in coal hydrogenation gasification technique the problem that hydrogen gas consumption is larger, carbon conversion efficiency is relatively low.The airflow bed gasification furnace that the present invention is provided, including gasification furnace outer tube, the upper area in gasification furnace outer tube are fixed with reaction inner core, and gasification furnace outer tube top is provided with solid material nozzle, and the top inlet of solid material nozzle orientating reaction inner core is arranged；Baffle plate is provided with below the bottom end outlet of reaction inner core；Gasification furnace outer tube side wall is provided with raw material gas jets, and raw material gas jets are located on the upside of baffle plate；Gasification furnace outer tube bottom is provided with gasification agent inlet.Present invention is mainly applied in the hydrogasification reaction of coal.
Description
Technical field
The present invention relates to gasification furnace technical field, more particularly to a kind of airflow bed gasification furnace.
Background technology
The gasification reaction of coal hydrogenation is a thermochemical process, using fine coal (fine coal of the general diameter less than 75 μm) as original
Material, using hydrogen as gasifying agent, the reaction under high-temperature and high-pressure conditions generates raw gas and tar light oil.Wherein, raw gas is passed through
Methane-rich gas are obtained after the operation such as separation.
At present, fine coal hydrogasification technique mainly adopts airflow bed gasification furnace.In prior art, airflow bed gasification furnace is usual
Coal nozzle is provided with the top of gasification furnace and hydrogen nozzle, bottom are provided with raw gas outlet and semicoke outlet；Wherein, hydrogen spray
Hydrogen heating furnace is generally connected with outside mouth, a large amount of cold hydrogen and a small amount of oxygen, a small amount of oxygen and portion in hydrogen heating furnace, is passed through
Combustion of hydrogen is divided to be lifted remaining hydrogen temperature, part burning makes entrance again in gasifying furnace nozzle to lift the hydrogen after temperature
The temperature of needs is reached in gasification furnace with the hydrogen of coal dust reaction.Specifically, fine coal and hydrogen are in high temperature, the gasification furnace of high pressure
After carrying out gasification reaction, raw gas, a small amount of tar light oil and a large amount of semicokes (coal not reacted completely) are generated；Wherein, product half
It is burnt typically directly to discharge from semicoke outlet.
Above-mentioned gasification furnace during coal hydrogenation gasification carries out preheating using hydrogen portion burning and can waste a large amount of preciousnesses
Mainly include carbon in hydrogen, and semicoke, can react generation hydrogen with vapor or oxygen, and release substantial amounts of heat, it is existing
In having technology, semicoke is typically directly discharged from semicoke outlet, therefore the hydrogen source and heat in the carbon source in semicoke, semicoke product
Source is not effectively utilized, and so as to cause, the hydrogen gas consumption in coal hydrogenation gasification technique is larger, carbon conversion efficiency is relatively low.
The content of the invention
The present invention provides a kind of airflow bed gasification furnace, solves and is gasified using airflow bed gasification furnace of the prior art
During reaction, need combustion parts hydrogen to be preheated, and semicoke is not utilized effectively, so as to cause in coal hydrogenation gasification technique
Hydrogen gas consumption is larger, the problem that carbon conversion efficiency is relatively low.
To reach above-mentioned purpose, the present invention is adopted the following technical scheme that：
A kind of airflow bed gasification furnace, including gasification furnace outer tube, the upper area in the gasification furnace outer tube are fixed with reaction
Inner core, the gasification furnace outer tube top are provided with solid material nozzle, top of the solid material nozzle towards the reaction inner core
End entrance is arranged；Baffle plate is provided with below the bottom end outlet of the reaction inner core；The gasification furnace outer tube side wall is provided with raw material gas blowout
Mouth, and the raw material gas jets are on the upside of the baffle plate；The gasification furnace outer tube bottom is provided with gasification agent inlet.
Wherein, the baffle plate is the circular arcuation baffle plate for raising up.
Specifically, the peripheral diameter of the circular arcuation baffle plate is the 6/5-3/2 of the reaction inner core barrel dliameter；The circle
Spacing between the bottom of the top of arcuation baffle plate and the reaction inner core is the 4/5-6/5 of the reaction inner core barrel dliameter.
During practical application, the solid material nozzle at least hangs down including a center for being located at the gasification furnace outer tube
Straight down-set central nozzle.
Wherein, the solid material nozzle also includes at least 2 peripheral injector nozzles, and the peripheral injector nozzles are sprayed around the center
Mouth is arranged in circumferential uniform pitch；The incident direction of the peripheral injector nozzles is 30- with the angle of the central nozzle incident direction
45 degree.
Specifically, the raw material gas jets at least include two；The raw material gas jets are evenly distributed on the gasification furnace
On the side wall of outer tube.
Further, the raw material gas jets are concordant with the bottom end outlet of the reaction inner core.
Preferably, the incident direction of the raw material gas jets is to tilt upward, and the folder of the incident direction and horizontal plane
Angle is 30-60 degree.
During practical application, in the outer medial wall of the tube of the gasification furnace, gas distribution grid is fixed with；The gas distribution grid is located at
The bottom section of the gasification furnace outer tube.
Wherein, the reaction inner core barrel dliameter is the 2/3-2/5 of the gasification furnace outer tube barrel dliameter；The reaction internal barrel is a length of
The 3/8-5/8 of the gasification furnace outer tube tube length；Between between the top and the top of the gasification furnace outer tube of the reaction inner core
Barrel dliameter of the gap less than the reaction inner core.
Specifically, product gas outlet is additionally provided with the side wall of the gasification furnace outer tube；The product gas outlet is located at described
The upper area of gasification furnace outer tube, and the top inlet region setting of the correspondence reaction inner core.
Further, slag-drip opening is additionally provided with the side wall of the gasification furnace outer tube；The slag-drip opening is located at the gasification furnace
The lower area of outer tube, and the underside area setting of the correspondence baffle plate.
Preferably, the slag-drip opening includes two；Two slag-drip openings are symmetrical arranged diagonally downward, and with the gasification
The angle of stove outer tube side wall is 30-60 degree.
In the airflow bed gasification furnace that the present invention is provided, illustrate by taking the hydrogasification of coal reaction as an example, fine coal can be from
Solid material nozzle enters reaction inner core, the ring that hydrogen can be entered between gasification furnace outer tube and reaction inner core from raw material gas jets
In gap, and there is coal hydrogenation gasification reaction with fine coal in being moved from the top inlet of reaction inner core into reaction inner core upwards, it is raw
Into hydrogen-rich raw gas (H2 contents are more, CH4 contents are less) and semicoke.Wherein, hydrogen-rich raw gas goes out from the bottom of reaction inner core
Mouth out when run into baffle plate, just occur baffling phenomenon, that is, circulate and move upwards；Semicoke then gas centrifugal action and itself
Under action of gravity, drop from around baffle plate in the lower area of gasification furnace outer tube, with the oxygen entered from gasification agent inlet or
There is gasification reaction in vapor, produce raw gas again, and raw gas is moved upwards to be met with hydrogen-rich raw gas and (contained in raw gas
Part high-temperature hydrogen), the annular space between reaction inner core and gasification furnace outer tube is moved upwards together, and is sprayed into raw material gas jets
The mixing of fresh cold hydrogen after, continue that coal hydrogenation gasification reaction occurs with fine coal in reaction inner core；Wherein, hydrogen-rich raw gas
Circulation can effectively realize the preheating of cold hydrogen, can also increase the time of staying of the hydrogen in gasification furnace, improve the profit of hydrogen
Use efficiency；The high temperature rough gas that char Gasification is produced contain a certain amount of hydrogen, can preheat cold hydrogen, or and fine coal adds
Hydrogen gasification reaction provides hydrogen source.Thus analysis understands, in the airflow bed gasification furnace that the present invention is provided, is provided with reaction
Cylinder, baffle plate, gasification agent inlet, and the lower end area of gasification furnace outer tube can carry out the gasification reaction of semicoke, obtain semicoke
Substantially effectively utilize, that is, generate preheating of the high temperature rough gas for coal hydrogenation gasification hydrogen in reaction, it is to avoid existing skill
Burning hydrogen in art is preheated；The gasification reaction of coal hydrogenation, therefore the gas that the present invention is provided can be carried out in reaction inner core
Fluidized gas producer is interior circulation two-part structure, can realize the hydrogasification of fine coal, semicoke again in a reaction unit
Gasification, and the preheating and the circulation of hydrogen-rich raw gas of hydrogen, so as to reduce the consumption of hydrogen, and improve carbon conversion effect
Rate, and then it is integrally improved the efficiency of coal hydrogenation gasification technique.
Description of the drawings
Fig. 1 is a kind of structural representation of coal hydrogenation gasification stove provided in an embodiment of the present invention；
Fig. 2 is the structural representation of another kind of coal hydrogenation gasification stove provided in an embodiment of the present invention.
In figure, 1- gasification furnace outer tube；2- reacts inner core；3- solid material nozzles；31- central nozzles；32- peripheral injector nozzles；
4- (circular arcuation) baffle plate；5- raw material gas jets；6- gasification agent inlets；7- gas distribution grids；8- product gas outlets；9- deslagginves
Mouthful；The lower area of A- gasification furnace outer tube；The cyclic process of a- hydrogen-rich raw gas；The cyclic process of b- raw gas.
Specific embodiment
Below in conjunction with the accompanying drawings a kind of coal hydrogenation gasification stove provided in an embodiment of the present invention is described in detail.
The embodiment of the present invention provides a kind of airflow bed gasification furnace, as shown in figure 1, including gasification furnace outer tube 1, gasification furnace outer tube
Upper area in 1 is fixed with reaction inner core 2, and 1 top of gasification furnace outer tube is provided with solid material nozzle 3,3 court of solid material nozzle
Top inlet to reaction inner core 2 is arranged；Baffle plate 4 is provided with below the bottom end outlet of reaction inner core 2；2 side wall of gasification furnace outer tube sets
There are raw material gas jets 5, and raw material gas jets 5 are located on the upside of baffle plate 4；2 bottom of gasification furnace outer tube is provided with gasification agent inlet 6.
In airflow bed gasification furnace provided in an embodiment of the present invention, illustrate by taking the hydrogasification reaction of coal as an example, fine coal
Can from solid material nozzle enter reaction inner core, hydrogen can from raw material gas jets enter gasification furnace outer tube with reaction inner core it
Between annular space in, and move upwards from reaction inner core top inlet enter reaction inner core in fine coal occur coal hydrogenation gasification it is anti-
Should, generate hydrogen-rich raw gas (H2 contents are more, CH4 contents are less) and semicoke.Wherein, hydrogen-rich raw gas is from the bottom of reaction inner core
Baffle plate is run into when bringing out mouth out, baffling phenomenon is just occurred, that is, is circulated and moves upwards；Semicoke then gas centrifugal action and from
Under the action of gravity of body, drop from around baffle plate in the lower area of gasification furnace outer tube, with the oxygen entered from gasification agent inlet
There is gasification reaction in gas or vapor, produce raw gas again, and raw gas is moved upwards and met (in raw gas with hydrogen-rich raw gas
Containing part high-temperature hydrogen), together along reaction inner core and gasification furnace outer tube between annular space move upwards, and with raw material gas jets
After the fresh cold hydrogen mixing for spraying into, continue that coal hydrogenation gasification reaction occurs with fine coal in reaction inner core；Wherein, hydrogen-rich is thick
The preheating of cold hydrogen can be effectively realized in the circulation of coal gas, can also increase the time of staying of the hydrogen in gasification furnace, improve hydrogen
Utilization ratio；The high temperature rough gas that char Gasification is produced contain a certain amount of hydrogen, can preheat cold hydrogen, or powder
Coal hydrogenation gasification reaction provides hydrogen source.Thus analysis understands, in airflow bed gasification furnace provided in an embodiment of the present invention, arranges
There are reaction inner core, baffle plate, gasification agent inlet, and the lower end area of gasification furnace outer tube can carry out the gasification reaction of semicoke, make
Semicoke is fully effectively used, that is, generate preheating of the high temperature rough gas for coal hydrogenation gasification hydrogen in reaction, it is to avoid
Burning hydrogen of the prior art is preheated；The gasification reaction of coal hydrogenation, therefore the present invention can be carried out in reaction inner core
The airflow bed gasification furnace that embodiment is provided is interior circulation two-part structure, and the hydrogenation of fine coal can be realized in a reaction unit
Gasification, semicoke are regasified, and the preheating and the circulation of hydrogen-rich raw gas of hydrogen, so as to reduce the consumption of hydrogen, and
Carbon conversion efficiency is improve, and then is integrally improved the efficiency of coal hydrogenation gasification technique.
Herein it should be added that, char Gasification produce raw gas temperature be 1000 DEG C or so, raw gas enters
Enough thermals source can be provided for the hydrogasification of coal during row circulation；Wherein, the hydrogen partial for containing in raw gas, can be coal
Hydrogasification enough hydrogen source is provided.Specifically, the rough coal that the hydrogen-rich raw gas of coal hydrogenation gasification generation, char Gasification are produced
The mixed gas temperature of fresh cold hydrogen that gas is sprayed into raw material gas jets is maintained at 800-900 DEG C, meets coal hydrogenation gasification
Temperature requirement.
Coal hydrogenation gasification of the prior art, it usually needs hydrogen partial burning is preheated, to reach reaction requirement
Temperature.Airflow bed gasification furnace provided in an embodiment of the present invention, only need to be passed through hot hydrogen at the initial reaction moment so that its with
There is gasification reaction in fine coal, so as to the carrying out of reaction, the raw gas that hydrogen-rich raw gas and char Gasification are produced can be coal
Hydrogasification provides certain thermal source and hydrogen source, that is, when realizing the circulation of follow-up raw gas, enable the high-temperature hydrogen in raw gas
It is enough to mix with the cold hydrogen being subsequently passed through, the efficient preheating of cold hydrogen is realized, to be gradually lowered the demand of hot hydrogen；Meanwhile,
Airflow bed gasification furnace provided in an embodiment of the present invention, by increasing capacitance it is possible to increase the time of staying of the hydrogen in gasification furnace, so as to effectively improve
The utilization ratio of hydrogen.
When actual production is manufactured, baffle plate 4 can be straight panel structure, such as circular baffle plate or rectangle baffle plate, but present invention reality
Apply in the airflow bed gasification furnace of example offer, in order to improve baffling effect of the baffle plate 4 to gas, as shown in figure 1, baffle plate 4 can be
The circular arcuation baffle plate 4 for raising up, i.e. the concrete structure of circle arcuation baffle plate 4 can be elliposoidal.Wherein, circular arcuation gear
Plate 4 can be by its own, between reaction inner core 2, and/or its own arranges support between gasification furnace outer tube 1 (in figure
It is not shown) it is fixed installation；Specifically, support can be made up of multiple metal rods and/or metal tube, multiple metal rods and/
Or between metal tube and circular arcuation baffle plate 4, reaction inner core 2, gasification furnace outer tube 1, can with adopt weld by the way of be fixed.
Certainly, this is not restricted for the concrete fixed form of baffle plate 4, and those skilled in the art can select other rational methods.
Specifically, the peripheral maximum gauge of circular arcuation baffle plate 4 can be the 6/5-3/2 of reaction 2 barrel dliameter of inner core, arc of circle
Spacing between the top of shape baffle plate 4 and the bottom end outlet of reaction inner core 2 can be the 4/5-6/5 of reaction 2 barrel dliameter of inner core, so as to
Circular arcuation baffle plate 4 ensure that the hydrogen-rich raw gas of hydrogasification generation, when baffle plate 4 is run into, can occur good baffling
Phenomenon, and be circulated up motion, meanwhile, semicoke can under the centrifugal action of gas and the action of gravity of itself, successfully from
1 lower area of gasification furnace outer tube that the periphery of circular arcuation baffle plate 4 is entered on the downside of which.Wherein, the top of circular arcuation baffle plate 4 with
Spacing between the bottom end outlet of reaction inner core 2, it may be preferred to be equal with the barrel dliameter of reaction inner core 2, so as to ensure
The circulation rate of gas, it is to avoid semicoke occurs to pile up, can avoid excessive gas to run downside into baffle plate 4 again, affect baffling effect
Really.
Herein it should be added that, reclinate circular arc in airflow bed gasification furnace provided in an embodiment of the present invention
The baffle plate 4 of structure, can not only make the hydrogen-rich raw gas from reaction inner core 2 out that baffling phenomenon occurs, but also can have
Effect ground reduces impact of the hydrogen-rich raw gas to baffle plate 4, so as to prevent accumulation of the semicoke (granule) on baffle plate 4, affects follow-up half
Burnt gasification reaction.Additionally, semicoke is regasified after the raw gas of generation runs into circular arcuation baffle plate 4, can be with coal hydrogenation gas
Change annular space of the hydrogen-rich raw gas for producing together between gasification furnace outer tube 1 and reaction inner core 2 to move upwards, prevent semicoke gas again
Change bottom of the raw gas for producing directly from reaction inner core 2 to enter, the flowing side contrary with the gas generation in reaction inner core 2
To the proper flow of gas in impact reaction inner core 2.
Further, solid material nozzle 3 can be one, and positioned at the center of gasification furnace outer tube 1 vertically downward
Arrange, so as to ensure that all fine coal that solid material nozzle 3 sprays can carry out gasification reaction in reaction inner core 2.Its
In, in order to fine coal can be dispersed at the top inlet of reaction inner core 2, as shown in figure 1, solid material nozzle 3 can be wrapped
A central nozzle 31 for being arranged positioned at the center of gasification furnace outer tube 1 vertically downward and multiple (at least 2) are included around center
The peripheral injector nozzles 32 that nozzle 31 is arranged in circumferential uniform pitch；Specifically, central nozzle 31 is may be located in gasification furnace outer tube 1
Heart position is arranged vertically downward, and peripheral injector nozzles 32 can symmetrically be inclined at the periphery of central nozzle 31, and can be preferably
Angle with central nozzle 31 is 30-45 degree, so as to ensure that all fine coal that solid material nozzle 3 sprays can
Into reaction inner core 2 in, additionally it is possible to make the fine coal that multiple different spray nozzles (31,32) are sprayed into reaction inner core 2 top inlet at
Occur mutually to collide, and then play a part of dispersed fine coal so as to can be fully contacted with hydrogen, as often as possible occur anti-
Should.
Preferably, in order that being uniformly distributed in annular space of the hydrogen between reaction inner core 2 and gasification furnace outer tube 1, such as Fig. 1 institutes
Show, raw material gas jets 5 at least can include two；Multiple above-mentioned raw materials gas jets 5 can be evenly distributed on gasification furnace outer tube 1
On the wall of side, so that the hydrogen in above-mentioned annular space can be uniformly distributed, and then from each side at the top inlet of reaction inner core 2
React in inner core 2 to entering, it is to avoid hydrogen is concentrated from a direction and entered in reaction inner core 2, it is impossible to be fully contacted with fine coal.Its
In, raw material gas jets 5 can be concordant with the bottom end outlet of reaction inner core 2, i.e., raw material gas jets 5 are gone out with the bottom of reaction inner core 2
It is highly consistent in the horizontal direction at mouthful, so as to the cold hydrogen that Jing raw materials gas jets 5 are sprayed into can be in the very first time with annular space
Hot gas contact, and flow through whole annular space from bottom to up and be sufficiently mixed, to realize the at utmost preheating of cold hydrogen.Tool
Body ground, the incident direction of raw material gas jets 5 can be to tilt upward, i.e., raw material gas jets 5 can be to tilt upward injection, and should
Incident direction can be 30-60 degree with the angle of horizontal plane, i.e., the angle of incidence of the injection of raw material gas jets 5 can be 30-60 degree, from
And reduce direct impact of the hydrogen for spraying into reaction 2 side wall of inner core；Meanwhile, incident direction and hydrogen-rich raw gas and half of hydrogen
The loop direction of the raw gas of coke gasification is consistent, and then is conducive to the Rapid Circulation of gas.
During practical application, in order that the gas that gasification agent inlet 6 is entered can be uniformly distributed, as shown in Fig. 2 outside gasification furnace
Cylinder can be provided with gas distribution grid 7 on 1 medial wall.Specifically, gas distribution grid 7 may be located at the bottom zone of gasification furnace outer tube 1
Domain, and it is corresponding with gasification agent inlet 6, while multiple through hole (not shown)s on gas distribution grid 7, can be provided with, so as to Jing gas
Vapor, and/or oxygen, and/or air that agent entrance 6 is entered, can pass through the multiple through holes on gas distribution grid 7,
Lower area of the even diffusion profile in gasification furnace outer tube 1, carries out fully gasification reaction with semicoke.
Preferably, in order to avoid the moieties in 1 lower area of gasification furnace outer tube fall to expiring whole gas distribution grid 7, lead
Cause gas distribution grid 7 on through hole blocking, affect gasifying agent dispersion effect, as shown in Fig. 2 gas distribution grid 7 can be to
Under inclined conical hopper formula structure, so as to the material fallen on gas distribution grid 7, voluntarily can slide to gas distribution grid 7
Central area, it is ensured that the through hole in other regions still keeps unimpeded.As gasification agent inlet 6 can be with gas distribution grid 7
Central area correspondence is vertically arranged, and dispels in gas distribution grid 7 so as to the gasifying agent that Jing gasification agent inlets 6 are sprayed into can also be played
The effect of heart district domain material.
Wherein, can fully gasify in reaction inner core 2 to ensure fine coal, as depicted in figs. 1 and 2, react inner core 2
Barrel dliameter can be the 2/3-2/5 of the barrel dliameter of gasification furnace outer tube 1, and the tube length for reacting inner core 2 can be the tube length of gasification furnace outer tube 1
3/8-5/8, so as to according to the bottle coal ratio and coal input quantity in real reaction, to meet the time of staying of the fine coal in reaction inner core 2
In the 10-20 seconds, and then sufficiently can be gasified.Between the top inlet of reaction inner core 2 and the top of gasification furnace outer tube 1
Gap can be less than the barrel dliameter of reaction inner core 2, to realize that the fine coal that solid material nozzle 3 is sprayed into can be rapidly introduced in reaction
In cylinder 2, there is gasification reaction with hydrogen；Simultaneously, it should be taken into account that ensure to react annular space between inner core 2 and gasification furnace outer tube 1
The good circulation of middle gas.Specifically, can be by the top of reaction inner core 2 and the multiple peaces vertically and horizontally of bottom welding
(not shown) is shelved, so as to realize the good fixation to reacting inner core 2.Certainly, the concrete fixed form for reacting inner core 2 exists
This is not restricted, and those skilled in the art can select other rational methods.
During practical application, as shown in Fig. 2 product gas outlet 8 and slag-drip opening 9 are additionally provided with the side wall of gasification furnace outer tube 1.Its
In, product gas outlet 8 may be located at the upper area of gasification furnace outer tube 1, so as to realize the collection of raw gas；Slag-drip opening 9 can be with
Positioned at the lower area of gasification furnace outer tube 1, so as to realize the collection of residue.
Specifically, the setting as shown in Fig. 2 product gas outlet 8 can be alignd with the top inlet of reaction inner core 2, so that from
The raw gas that product gas outlet 8 is discharged, obtains pure methane and pure cold hydrogen through dedusting and after separating；Wherein, it is pure cold
Hydrogen can carry out gasification reaction with fine coal sprayed in coal hydrogenation gasification stove by raw material gas jets 5 again.The embodiment of the present invention
In the airflow bed gasification furnace of offer, in order to prevent from product gas outlet 8 flow effect of the raw gas discharged to coal hydrogenation gasification
The top of inner core 2 is slightly below reacted in the flowing of the gas entered in reaction inner core 2 from annular space in stove, preferably product gas outlet 8
Entrance is arranged.During practical application, slag-drip opening 9 may be located at the underside area of baffle plate 4 and arrange, and regasify height so as to ensure semicoke
Degree, i.e. in the response time of semicoke, make semicoke have enough time of staying in the lower area of gasification furnace outer tube 1, generally according to
The reactivity of Coal rank semicoke should be maintained at 5-30 minutes and be advisable.
Preferably, in order that reacted residue quickly and smoothly can be discharged, as shown in Fig. 2 slag-drip opening 9 can be wrapped
Include two.Wherein, two slag-drip openings 9 can be symmetrical arranged diagonally downward, and be 30-60 with the angle of 1 side wall of gasification furnace outer tube
Degree, so as to ensure that the residue after char Gasification smoothly can be discharged.
Airflow bed gasification furnace of the prior art, generally burns to preheat reaction gas (often 1 kilogram of reaction using hydrogen portion
Coal needs to burn 0.5 cubic metre or so of hydrogen preheating, and this hydrogen partial is not involved in reaction, and simply burning provides heat), make
Waste into hydrogen；And the hydrogen in raw gas returns to gasification furnace after separating, thermal loss is more serious；Course of reaction
Middle efficiency of carbon con version is low, and typically 45% or so, a large amount of semicokes of generation are expelled directly out after the Quench of gasification furnace bottom, and half
Carbon residue in Jiao is not utilized effectively.However, airflow bed gasification furnace provided in an embodiment of the present invention, while realizing fine coal
Hydrogasification, the regasifying of semicoke, the efficient preheating of cold hydrogen and the circulation of hydrogen-rich raw gas, improve whole coal hydrogenation gas
The efficiency of chemical industry skill, overall carbon conversions bring up to more than 90%.Wherein, regasifying for semicoke not only make semicoke and obtained efficiently
Conversion, and sufficiently recycle, and react for coal hydrogenation gasification and provide hydrogen source and substantial amounts of thermal source.
Specifically, as depicted in figs. 1 and 2, in airflow bed gasification furnace provided in an embodiment of the present invention, the hydrogenation of fine coal exists
Carry out in reaction inner core 2, the cyclic process of the hydrogen-rich raw gas of generation is as shown in dotted arrow a；Regasifying for semicoke is being gasified
Carry out in the lower area of stove outer tube 1, the region as shown in solid arrow A, the cyclic process such as dotted arrow b of the raw gas of generation
It is shown.
The above, the only specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, should all be contained
Cover within protection scope of the present invention.Therefore, protection scope of the present invention described should be defined by scope of the claims.
Claims (13)
1. a kind of airflow bed gasification furnace, it is characterised in that including gasification furnace outer tube, the upper area in the gasification furnace outer tube is solid
Surely there is reaction inner core, the gasification furnace outer tube top is provided with solid material nozzle, and the solid material nozzle is towards the reaction
The top inlet of inner core is arranged；
Baffle plate is provided with below the bottom end outlet of the reaction inner core, the baffle plate is used to make from the bottom end outlet for reacting inner core out
Gas occur baffling；Gap is provided between the side wall of the reaction inner core and gasification furnace outer tube, the gap is circulated for gas；
The gasification furnace outer tube side wall is provided with raw material gas jets, and the raw material gas jets are located on the upside of the baffle plate；The gasification furnace
Outer tube bottom is provided with gasification agent inlet.
2. airflow bed gasification furnace according to claim 1, it is characterised in that the baffle plate is the circular arcuation for raising up
Baffle plate.
3. airflow bed gasification furnace according to claim 2, it is characterised in that the peripheral diameter of the circular arcuation baffle plate is
The 6/5-3/2 of the reaction inner core barrel dliameter；Between between the top of the circular arcuation baffle plate and the bottom of the reaction inner core
Away from the 4/5-6/5 for the reaction inner core barrel dliameter.
4. airflow bed gasification furnace according to claim 1, it is characterised in that the solid material nozzle at least includes
Positioned at the central nozzle that the center of the gasification furnace outer tube is arranged vertically downward.
5. airflow bed gasification furnace according to claim 4, it is characterised in that the solid material nozzle also includes at least 2
Individual peripheral injector nozzles, the peripheral injector nozzles are arranged in circumferential uniform pitch around the central nozzle；The incidence of the peripheral injector nozzles
Direction is 30-45 degree with the angle of the central nozzle incident direction.
6. airflow bed gasification furnace according to claim 1, it is characterised in that the raw material gas jets at least include two；
The raw material gas jets are evenly distributed on the side wall of the gasification furnace outer tube.
7. airflow bed gasification furnace according to claim 6, it is characterised in that the raw material gas jets and the reaction inner core
Bottom end outlet it is concordant.
8. airflow bed gasification furnace according to claim 6, it is characterised in that the incident direction of the raw material gas jets is to incline
Obliquely, and the angle of the incident direction and horizontal plane is 30-60 degree.
9. airflow bed gasification furnace according to claim 1, it is characterised in that be fixed with the outer medial wall of the tube of the gasification furnace
Gas distribution grid；The gas distribution grid is located at the bottom section of the gasification furnace outer tube.
10. airflow bed gasification furnace according to claim 1, it is characterised in that the reaction inner core barrel dliameter is the gasification
The 2/3-2/5 of stove outer tube barrel dliameter；The 3/8-5/8 for reacting a length of gasification furnace outer tube tube length of internal barrel；In the reaction
Barrel dliameter of the gap between the top and the top of the gasification furnace outer tube of cylinder less than the reaction inner core.
11. airflow bed gasification furnaces according to claim 1, it is characterised in that also set on the side wall of the gasification furnace outer tube
There is product gas outlet；Upper area of the product gas outlet positioned at the gasification furnace outer tube, and the correspondence reaction inner core
Top inlet region is arranged.
12. airflow bed gasification furnaces according to claim 1, it is characterised in that also set on the side wall of the gasification furnace outer tube
There is slag-drip opening；The slag-drip opening is located at the lower area of the gasification furnace outer tube, and the underside area of the correspondence baffle plate is arranged.
13. airflow bed gasification furnaces according to claim 12, it is characterised in that the slag-drip opening includes two；Two institutes
State slag-drip opening to be symmetrical arranged diagonally downward, and be 30-60 degree with the angle of the gasification furnace outer tube side wall.
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| CN107721112B (en) * | 2017-11-21 | 2024-02-02 | 湖北加德科技股份有限公司 | Municipal sludge drying pyrolysis gasification self-sustaining incineration system |
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| CN108753366B (en) * | 2018-06-04 | 2019-11-26 | 新奥科技发展有限公司 | A kind of airflow bed gasification furnace |
| CN109453824B (en) * | 2018-11-15 | 2021-09-10 | 新奥科技发展有限公司 | Catalyst loading method and catalytic hydro-gasification method |
| CN112461017B (en) * | 2020-11-13 | 2022-08-30 | 浙江启尔机电技术有限公司 | Thermal buffer tank, liquid supply device using the same, and thermal buffer method |
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