CN106987279A - A kind of U-shaped coal gasification reaction device of secondary separation slagging-off and the coal gasifying process that secondary separation slagging-off is carried out using the device - Google Patents
A kind of U-shaped coal gasification reaction device of secondary separation slagging-off and the coal gasifying process that secondary separation slagging-off is carried out using the device Download PDFInfo
- Publication number
- CN106987279A CN106987279A CN201710317087.9A CN201710317087A CN106987279A CN 106987279 A CN106987279 A CN 106987279A CN 201710317087 A CN201710317087 A CN 201710317087A CN 106987279 A CN106987279 A CN 106987279A
- Authority
- CN
- China
- Prior art keywords
- gasification
- coal
- room
- secondary separation
- hearth
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- C10J3/52—Ash-removing devices
- C10J3/526—Ash-removing devices for entrained flow gasifiers
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/72—Other features
- C10J3/721—Multistage gasification, e.g. plural parallel or serial gasification stages
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0913—Carbonaceous raw material
- C10J2300/093—Coal
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
Abstract
A kind of U-shaped coal gasification reaction device of secondary separation slagging-off and the coal gasifying process that secondary separation slagging-off is carried out using the device, it is related to a kind of U-shaped coal gasification reaction device of secondary separation slagging-off and the coal gasifying process of secondary separation slagging-off is carried out using the device.The present invention is to solve existing entrained flow gasification converter fly ash growing amount is big, unburned carbon in flue dust is high, efficiency of carbon con version is low and the problem of low energy utilization rate.The U-shaped coal gasification reaction device of secondary separation slagging-off is made up of gasification body of heater, horizontal flue and useless pot；The gasification body of heater is made up of gasifier nozzle, gasification hearth, water screen tube, cooling water pipe and slag bath；The useless pot is divided into radiation heat transfer room and convection heat-exchange chamber by middle furnace wall；The gasification body of heater, horizontal flue and second gasification room constitute the coal gasification reaction area of U-shaped.The present invention is used for coal gasification.
Description
Technical field
Secondary separation is carried out the present invention relates to a kind of U-shaped coal gasification reaction device of secondary separation slagging-off and using the device
The coal gasifying process of slagging-off.
Background technology
China is world's coal production and consumption big country, and at present, coal accounts for 70% in China's primary energy consumption structure
Left and right, the wherein coal of more than half are used by the way of directly burning, resulting pollution that caused by coal burning thing pair
Ecological environment causes serious pollution.Coal Gasification Technology is one of most important clean coal technology, can using Coal Gasification Technology
To produce industrial fuel gas, domestic fuel gas, chemical industry synthesis unstripped gas, synthetic fuel oil unstripped gas, hydrogen fuel cell, synthesis day
Right gas, rocket fuel etc..Current main Coal Gasification Technology has moving bed fixed bed gasification, fluidized gasification, entrained flow gasification
And molten bath gasifica tion, wherein, entrained flow bed gasification technology is because its intensity of gasification is high, big single stove production capacity, coal wide adaptation range,
The advantages of efficiency of carbon con version is high turns into the main development direction of coal gasification.
It is main to use two kinds of entrained flow gasification skills of chilling process and pot destroying process in current industrialized gasification technology
Art.Chilling process is as disclosed in the patent CN105255522A that gasifies as disclosed in Shanghai Furnace Factory Co., Ltd, Siemens Company
Described in patent CN204097415U, CN101255362A that gasifies, after synthesis gas leaves vaporizer, using the method for wash cooling
Temperature is cooled to about 200 DEG C for 1200 DEG C~1600 DEG C of high-temperature synthesis gas and lime-ash, most of sensible heat is swashed in synthesis gas
Cold water is taken away, and effective utilization rate of energy is low.Another is pot destroying process, and gasify patent as disclosed in Shell companies
Described in CN1639306, synthesis gas is set to cool by the method for circulating synthesis gas Quench and useless pot recuperation of heat.Although the flow can
The problem of reclaiming synthesis gas sensible heat, but often occur useless pot ash deposit and slag buildup in the process of running, block synthesis gas passage, forces work
The unplanned parking of factory, needs the process equipment of complexity to handle dust-laden synthesis gas in addition in the follow-up workshop section of the flow, cost compared with
It is high.
The chemical reactivity of coal represent the coal be used for gasify complexity, the relatively low coal of gasification reactivity
Kind, reaction rate is slow, and the time required for the reaction that is gasified totally is long.Existing Coal Gasification Technology coal dust is only sent out in gasification hearth
Raw reaction, and due to using chilling process, force to remove slag stopping in 900~1250 DEG C of effecting reaction temperature range
Process is stayed, its residence time is shorter, if the relatively low coal of selected activity is raw material, the utilization ratio of coal will be greatly reduced, raw
Same amount of synthesis gas is produced, the demand of coal increases, and operating cost will also be significantly improved, therefore existing Coal Gasification Technology is for coal
The reactivity planted has strict demand, and its coal adaptability is poor.
In addition, in existing gasification technology, residence time of the coal dust in gasification furnace is short, causes the carbon in coal dust to fail completely
Reaction, the flying dust amount for discharging gasification furnace with synthesis gas is big, and unburned carbon in flue dust is high, and gasification furnace efficiency of carbon con version is low, adds gasification
Cost.For example：A set of coal consumption is the coal gasification apparatus of 1000 ton days, and year generation flying dust amount is about 20,000 tons, unburned carbon in flue dust
About 10%~30%, the quality of the carbon slatterned in the flying dust generated every year is about 2000~6000 tons, be converted to consumption coal into
This about 100~3,000,000 yuan.
The content of the invention
The present invention is to solve existing entrained flow gasification converter fly ash growing amount is big, unburned carbon in flue dust is high, efficiency of carbon con version it is low with
And energy utilization rate it is low the problem of, and a kind of U-shaped coal gasification reaction device of secondary separation slagging-off is provided and entered using the device
The coal gasifying process of row secondary separation slagging-off.
A kind of U-shaped coal gasification reaction device of secondary separation slagging-off of the present invention is by gasification body of heater, horizontal flue and useless pot group
Into；The gasification body of heater is made up of gasifier nozzle, gasification hearth, water screen tube, cooling water pipe and slag bath；The useless pot is by spoke
Penetrate Heat Room, convection heat-exchange chamber, middle furnace wall and syngas outlet composition；Gasification hearth is provided with the gasification furnace body, institute
State gasification hearth to be surrounded by water screen tube, the top of the gasification body of heater is provided with gasifier nozzle, the gasifier nozzle with
Gasification hearth is connected, and the bottom of the gasification body of heater is provided with slag bath, and the slag bath is connected with gasification hearth；The useless pot
Radiation heat transfer room and convection heat-exchange chamber are divided into by middle furnace wall, the top of the useless pot is provided with exhaust gases passes to connect spoke
Heat Room and convection heat-exchange chamber are penetrated, the bottom of the radiation heat transfer room is second gasification room, and the bottom of the second gasification room is set
It is equipped with useless pot entrance, the second gasification room and is provided with reverse c-shape air-flow transfer, the reverse c-shape air-flow transfer is set
Put on the relative middle furnace wall of useless pot entrance, some groups of convection heating surfaces, the convection current are provided with the heat convection room
The bottom of Heat Room is provided with syngas outlet；The gasification body of heater is connected with useless pot by horizontal flue, the horizontal cigarette
The two ends in road are connected with gasification hearth and second gasification room respectively, the gasification body of heater, horizontal flue and second gasification room group
Into the coal gasification reaction area of U-shaped；Stagger arrangement or in-line arrangement have vertical scummer in the horizontal flue, if the scummer by
Dry root cooling water pipe, which is staggered, to be formed；The inwall in the coal gasification reaction area of the U-shaped is laid with a floor flame-proof thermal insulation material
Layer.
The operation principle of the present apparatus：Coal gasification reaction occurs in gasification body of heater and horizontal flue and secondary gas in the present invention
In the U-shaped coal gasification reaction area for changing room three composition.Coal dust and gasifying agent enter gasification hearth by gasifier nozzle, in gasification furnace
Gasification reaction occurs in thorax.Along with the progress of gasification reaction, the ash content in pulverized coal particle is melted rapidly at high operating temperatures, shape
Into molten slag, a part of liquid slag is deposited on the internal face of gasification hearth, and flows into slag bath along the internal face of gasification hearth,
Discharged after being cooled down in slag bath, remaining liquid slag and the synthesis gas and unreacting gas agent composition mixed airflow of reaction generation.It is mixed
Air-flow is closed by during scummer, remaining liquid slag is further caught in horizontal flue, the molten slag at large caught then with
Mixed airflow enters second gasification room.Into after second gasification room, mixed airflow is stopped by reverse c-shape air-flow transfer,
Air-flow fast steering so that the liquid slag carried secretly in mixed airflow is separated under inertia force effect from air-flow, is deposited to
The bottom of second gasification room, meanwhile, under the strong disturbance effect of reverse c-shape air-flow transfer, the increase of air-flow mixing intensity, liquid
Second gasification reaction occurs in second gasification room for unreacted carbon and gasifying agent in state slag.After second gasification reacts,
Carbon residue and gasifying agent in molten slag have completely reacted.Molten slag under being trapped and deposited by scummer is through horizontal cigarette
Road flows into the slag bath of gasification hearth bottom, discharges gasification hearth；The synthesis gas ultimately generated flows through useless pot, is passed to convection heating surface
Heat is passed, is finally flowed out by syngas outlet.
The coal gasifying process that secondary separation slagging-off is carried out using said apparatus is to carry out according to the following steps：
First, gasification hearth internal pressure is set as 0.1~4MPa, and the running temperature of gasification hearth is 1250 DEG C~1600
℃；
2nd, coal dust and gasifying agent are sent into gasification hearth by gasifier nozzle, gasification reaction occurs in gasification hearth；
When the ash content in pulverized coal particle is melted rapidly at high operating temperatures, molten slag is formed；A part of liquid of molten slag melts
Slag deposits flows into slag bath on the internal face of gasification hearth, and along the internal face of gasification hearth, is discharged after being cooled down in slag bath；It is surplus
Remaining molten slag, the synthesis gas of reaction generation and unreacting gas agent composition mixed airflow；Mixed airflow enters by horizontal flue
Enter second gasification room, when mixed airflow passes through horizontal flue, remaining liquid slag is further caught by the scummer in horizontal flue
Collection, the molten slag of collection at large enters second gasification room with the synthesis gas and unreacting gas agent of reaction generation；In secondary gas
Change interior and stopped that air-flow fast steering, the molten slag of entrainment is isolated from air-flow by reverse c-shape air-flow transfer
Come, deposit to the bottom of second gasification room, then flow into slag bath, meanwhile, the synthesis gas and unreacting gas agent for reacting generation exist
Second gasification reaction, the synthesis gas ultimately generated occur in second gasification room；
3rd, the synthesis gas ultimately generated enters convection heat-exchange chamber by the exhaust gases passes on useless pot top, in convection heat-exchange chamber
It is interior that heat is transmitted by convection heating surface, then by being flowed out by syngas outlet.
The beneficial effects of the invention are as follows：
First, the present invention, which can be improved, catches slag efficiency.
Such as using chilling process gasification technology in, entrainment of flying dust synthesis gas flow by simply water spray Quench after
Gasification furnace is flowed out, flying dust is easy to be carried over, therefore the flying dust amount of discharge gasification furnace is big, is discharged during gasification furnace actual motion
Lime-ash is than general 3:7~5:Between 5.That using two kinds catches mode associated with slag means in the present invention to strengthen gasification furnace catches slag
Ability：(1) scummer is set in horizontal flue, using scummer enhancing to the seizure for the molten slag carried secretly in mixed airflow
Ability, scummer can trap about 20% molten slag；(2) reverse c-shape air-flow is set up on the furnace wall of second gasification room side
Transfer, mixed airflow is stopped that air-flow fast steering is mixed in second gasification room by reverse c-shape air-flow transfer
The molten slag carried secretly in air-flow is separated under inertia force effect from air-flow, is deposited on reverse c-shape air-flow transfer,
And flowed downward along water screen tube, finally discharged by the lower cinder notch of gasification hearth bottom.Therefore, the present invention can reduce discharge gas
Change the flying dust amount of stove, lime-ash ratio can reach 1:9, catch slag efficiency high.
2nd, the present invention can be prevented effectively from useless pot ash deposit and slag buildup problem.
Such as using in the gasification technology of pot destroying process, in top of gasification furnace using circulation low temperature synthesis gas Quench, make synthesis
Temperature degree is reduced to 900 DEG C or so, then further carries out heat recovery to synthesis gas in useless pot.When gasification furnace load fluctuation
Or during adjusting process parameter, useless pot entrance synthesis gas temperature rise is easily caused, and a large amount of flying dusts carried in synthesis gas are in height
Temperature is lower to have certain adhesiveness, induces useless pot ash deposit and slag buildup, influences its heat recovery to synthesis gas, give up pot production superheated steam
Temperature is reduced, and is caused a large amount of steam grid-connected can only can not empty, is caused serious waste.In addition the pot dust stratification that gives up can also be caused when serious
Synthesis gas channel blockage, causes gasification furnace to explode, and triggers major accident.The present invention using two kinds catch mode associated with slag means come
That strengthens gasification furnace catches slag ability, can trap more than 90% molten slag carried in synthesis gas, and is captured down
Liquid lime-ash flows into the slag bath of gasification hearth bottom through horizontal flue, and synthesis gas will not be followed to enter in useless pot；And residue is about
When 10% lime-ash flows out second gasification room with synthesis gas, its temperature has already decreased to about 900 DEG C, and now the adhesiveness of lime-ash has been
Through extremely faint, it will not also be sticked to when flowing through useless pot stream heat convection face on tube wall.It can be seen that, the present invention can be prevented effectively from useless pot
Ash deposit and slag buildup problem.
3rd, the present invention expands gasification reaction space, extends coal dust and residence time of the gasifying agent in stove, is conducive to
The abundant progress of gasification reaction, improves the efficiency of carbon con version of gasification installation.
Such as dry coal powder airflow bed coal gasification apparatus generally uses chilling process, in order to ensure to be capable of smooth liquid at lower cinder notch
State deslagging, cinder notch temperature is higher than ash fusion point, therefore deslagging temperature is 1200 DEG C~1600 DEG C, and molten slag enters after lower cinder notch
Water spray Quench is carried out, slag temperature is reduced rapidly.It can be seen that the deslagging temperature of prior art stops far above coal gasification effecting reaction
Temperature (about 900 DEG C), prior art forces to remove slag in 900 DEG C to the effecting reaction temperature range between deslagging temperature
Gasification reaction can not occur in the temperature range for the unreacted carbon in holding process, slag, therefore its gasification reaction time is short,
Gasification reaction fails to carry out completely, to cause ash content carbon high.Coal gasification reaction occurs in gasification body of heater and level in the present invention
In the U-shaped coal gasification reaction area of flue and second gasification room three composition.Second gasification room is set in useless pot porch, it is secondary
The water screen tube of vaporizer lays flame-proof thermal insulation material to fiery side, reduces furnace wall caloric receptivity to maintain two using flame-proof thermal insulation material
Secondary vaporizer is in higher temperature (more than 900 DEG C), carbon residue and gasifying agent in gasification hearth in unreacted molten slag
Can occur gasification reaction in this space, gasification effective reaction space is increased with this, extend the gasification reaction time, it is ensured that coal dust
Fully reacted with gasifying agent, improve the efficiency of carbon con version of gasification installation.
4th, the present invention can reclaim synthesis gas sensible heat, improve effective utilization rate of energy.
As dry coal powder airflow bed coal gasification apparatus is cooled down using chilling process is direct to high-temperature synthesis gas, chilled water and
High-temperature synthesis gas is directly contacted, and a large amount of sensible heats contained in synthesis gas are quenched water and taken away, and thereby results in the huge wave of the energy
Take, the heating gas efficiency of gasification installation (the enthalpy increment of the chemical energy of synthesis gas and steam in synthesis gas sensible heat utilization system it
With the ratio between with the chemical energy of coal for gasification) it is low.The present invention uses pot destroying process cooling down high-temperature synthesis gas, while being absorbed using useless pot
Heat production high-temperature steam, preboiler feedwater, pot destroying process can reclaim equivalent to 15 in feed coal low heat valve~
18% energy so that heating gas efficiency is up to 90~95%, and heating gas efficiency improves 5~8% compared with chilling process；This
Outside, the price of steam is 100~200 yuan per ton, is 30000Nm for a gas making amount3The supporting useless pot of/h gasification furnace,
About 30 tons of steam can be produced per hour, and the annual return of steam is about 30,000,000 yuan, it can be seen that, the present invention can effectively reclaim conjunction
Into gas sensible heat, effective utilization rate of energy is improved, huge economic benefit is brought to enterprise.
5th, gasification reactor apparatus of the invention can gasify low reaction activity coal, and coal adaptability is strong.
The chemical reactivity of coal represent the coal be used for gasify complexity, the relatively low coal of gasification reactivity
Kind, reaction rate is slow, and the time required for the reaction that is gasified totally is long.Existing Coal Gasification Technology coal dust is only sent out in gasification hearth
Raw reaction, and due to using chilling process, force to remove slag stopping in 900~1250 DEG C of effecting reaction temperature range
Process is stayed, its residence time is shorter, if the relatively low coal of selected activity is raw material, the utilization ratio of coal will be greatly reduced, raw
Same amount of synthesis gas is produced, the demand of coal increases, and operating cost will also be significantly improved, therefore existing Coal Gasification Technology is for coal
The reactivity planted has strict demand, and its coal adaptability is poor.Second gasification room is set in the porch of useless pot in the present invention,
Effective gasification space of coal dust is significantly increased, extends its residence time, low reaction activity coal can be made fully to react.Cause
This, the present invention can use low reaction activity coal, and coal adaptability is strong.
Brief description of the drawings
Fig. 1 is that a kind of structure of the U-shaped coal gasification reaction device of secondary separation slagging-off described in embodiment four is shown
It is intended to；
Fig. 2 is the structural representation for the scummer that stagger arrangement form is arranged；
Fig. 3 is Fig. 2 B directions view；
Fig. 4 is the sectional view in Fig. 2 C-C directions；
Fig. 5 is the enlarged drawing of D parts in Fig. 4；
Fig. 6 is the structural representation for the scummer that in-line form is arranged；
Fig. 7 is Fig. 6 B directions view；
Fig. 8 is the sectional view in Fig. 6 C-C directions；
Fig. 9 is the enlarged drawing of D parts in Fig. 8；
Figure 10 is that a kind of structure of the U-shaped coal gasification reaction device of secondary separation slagging-off described in embodiment five is shown
It is intended to；
Figure 11 is the sectional view in E-E directions in Figure 10.
Embodiment
Technical solution of the present invention is not limited to act embodiment set forth below, in addition between each embodiment
Any combination.
Embodiment one：Illustrate present embodiment, a kind of secondary separation slagging-off of present embodiment with reference to Fig. 1~Fig. 9
U-shaped coal gasification reaction device be made up of gasification body of heater 4, horizontal flue 8 and useless pot 1；The gasification body of heater 4 is by gasifier nozzle
3rd, gasification hearth 5, water screen tube 6, cooling water pipe 14 and slag bath 9 are constituted；The useless pot 1 by radiation heat transfer room, convection heat-exchange chamber,
Middle furnace wall and syngas outlet 11 are constituted；Gasification hearth 5 is provided with the gasification body of heater 4, the gasification hearth 5 is by water cooling
Wall pipe 6 is surrounded, and the top of the gasification body of heater 4 is provided with gasifier nozzle 3, and the gasifier nozzle 3 is connected with gasification hearth 5
Logical, the bottom of the gasification body of heater 4 is provided with slag bath 9, and the slag bath 9 is connected with gasification hearth 5；The useless pot 1 is by centre
Furnace wall is divided into radiation heat transfer room and convection heat-exchange chamber, and the top of the useless pot 1 is provided with exhaust gases passes and changed to connect radiation
Hot cell and convection heat-exchange chamber, the bottom of the radiation heat transfer room is second gasification room 2, and the bottom of the second gasification room 2 is set
Have and reverse c-shape air-flow transfer 13 is provided with useless pot entrance, the second gasification room 2, the reverse c-shape air-flow transfer 13
It is arranged on the relative middle furnace wall of useless pot entrance, some groups of convection heating surfaces 12 is provided with the heat convection room, it is described
The bottom of convection heat-exchange chamber is provided with syngas outlet 11；The gasification body of heater 4 is connected with useless pot 1 by horizontal flue 8, institute
The two ends for stating horizontal flue 8 are connected with gasification hearth 5 and second gasification room 2 respectively, the gasification body of heater 3, the and of horizontal flue 8
Second gasification room 2 constitutes the coal gasification reaction area of U-shaped；Stagger arrangement or in-line arrangement have vertical scummer in the horizontal flue 8
10, the scummer 10 is staggered by some cooling water pipes 14 and formed；The inwall in the coal gasification reaction area of the U-shaped is applied
Provided with one layer of flame-proof thermal insulation material layer 7.
Embodiment two：Present embodiment from unlike embodiment one：It is adjacent in the scummer 10
Lateral clearance L between cooling water pipe 14 is not less than 100mm, and longitudinal pitch d is not less than 2.5 times of the diameter of cooling water pipe 14.Such as
This setting, which is easy to strengthen gasification furnace, catches slag ability, further reduction flying dust growing amount, while be also avoided that scummer slagging.Its
He is identical with embodiment one.
Embodiment three：Present embodiment from unlike embodiment one or two：The cooling water pipe 14
Material is identical with water screen tube 6.Other are identical with embodiment one or two.
Embodiment four：Unlike one of present embodiment and embodiment one to three：The gasification furnace
Burner 3 is single burner, and the gasifier nozzle 3 is vertically arranged in the top of gasification body of heater 4, the axle of the gasifier nozzle 3
Line and the axis of gasification hearth 5 coincide.Other are identical with one of embodiment one to three.
Embodiment five：Illustrate present embodiment, present embodiment and embodiment with reference to Figure 10 and Figure 11
Unlike one of one to four：The gasifier nozzle 3 is is arranged on 4 burners of the gasification upper side of body of heater 4, and 4 are burnt
The center line of mouth forms the circle of contact in the center of gasification hearth 5.Other are identical with one of embodiment one to four.
Embodiment six：Illustrate present embodiment with reference to Fig. 1~Figure 11, present embodiment utilizes embodiment
The coal gasifying process that device described in one carries out secondary separation slagging-off is to carry out according to the following steps：
First, the internal pressure of gasification hearth 5 is set as 0.1~4MPa, and the running temperature of gasification hearth 5 is 1250 DEG C~1600
℃；
2nd, coal dust and gasifying agent are sent into gasification hearth 5 by gasifier nozzle 3, gasified reverse occurs in gasification hearth 5
Should；When the ash content in pulverized coal particle is melted rapidly at high operating temperatures, molten slag is formed；A part of liquid of molten slag
Slag deposition flows into slag bath 9 on the internal face of gasification hearth 5, and along the internal face of gasification hearth 5, after being cooled down in slag bath 9
Discharge；Remaining liquid slag, the synthesis gas of reaction generation and unreacting gas agent composition mixed airflow；Mixed airflow passes through level
Flue 8 enters second gasification room 2, and when mixed airflow passes through horizontal flue 8, remaining liquid slag is by the slagging-off in horizontal flue 8
Device 10 is further trapped, and the molten slag of collection at large enters second gasification with the synthesis gas and unreacting gas agent of reaction generation
Room 2；By the stop of reverse c-shape air-flow transfer 13, air-flow fast steering, the molten slag of entrainment in second gasification room 2
Separated from air-flow, deposit to the bottom of second gasification room 2, then flow into slag bath 9, meanwhile, react the synthesis gas of generation
Occur second gasification reaction, the synthesis gas ultimately generated in second gasification room 2 with unreacting gas agent；
3rd, the synthesis gas ultimately generated enters convection heat-exchange chamber by the exhaust gases passes on the useless top of pot 1, in convection heat-exchange chamber
It is interior that heat is transmitted by convection heating surface 12, then by being flowed out by syngas outlet 11.
Embodiment seven：Present embodiment from unlike embodiment six：The second gasification room 2 is exported
Flue-gas temperature is 900 DEG C.Other are identical with embodiment six.
Embodiment eight：Present embodiment from unlike embodiment six or seven：The coal dust is low work
Property coal.Other are identical with embodiment six or seven.
Embodiment nine：Unlike one of present embodiment and embodiment six to eight：The gasifying agent
The mixed gas constituted for oxygen or oxygen with vapor.Other are identical with one of embodiment six to eight.
Beneficial effect of the present invention is verified using following examples：
Embodiment：Illustrate the present embodiment with reference to Fig. 1, the present embodiment carries out two using the device described in embodiment one
The coal gasifying process of secondary separation slagging-off is to carry out according to the following steps：
First, the internal pressure of gasification hearth 5 is set as 4MPa, coal consumption is 1000t/d, the running temperature of gasification hearth 5 is
1250 DEG C~1600 DEG C；
2nd, coal dust and gasifying agent are sent into gasification hearth 5 by gasifier nozzle 3, gasified reverse occurs in gasification hearth 5
Should；When the ash content in pulverized coal particle is melted rapidly at high operating temperatures, molten slag is formed；A part of liquid of molten slag
Slag deposition flows into slag bath 9 on the internal face of gasification hearth 5, and along the internal face of gasification hearth 5, after being cooled down in slag bath 9
Discharge；Remaining liquid slag, the synthesis gas of reaction generation and unreacting gas agent composition mixed airflow；Mixed airflow passes through level
Flue 8 enters second gasification room 2, and when mixed airflow passes through horizontal flue 8, remaining liquid slag is by the slagging-off in horizontal flue 8
Device 10 is further trapped, and the molten slag of collection at large enters second gasification with the synthesis gas and unreacting gas agent of reaction generation
Room 2；By the stop of reverse c-shape air-flow transfer 13, air-flow fast steering, the molten slag of entrainment in second gasification room 2
Separated from air-flow, deposit to the bottom of second gasification room 2, then flow into slag bath 9, meanwhile, react the synthesis gas of generation
Occur second gasification reaction, the synthesis gas ultimately generated in second gasification room 2 with unreacting gas agent；
3rd, the synthesis gas ultimately generated enters convection heat-exchange chamber by the stomata on the useless top of pot 1, leads in heat convection room
The transmission heat of convection heating surface 12 is crossed, then by being flowed out by syngas outlet 11.
Lime-ash ratio processed by the invention reaches 1:9, unburned carbon in flue dust 7%, it is seen that its flying dust amount is low, and flying dust carbon residue is low, carbon
High conversion rate.Numerical computations checking is learnt：Coal dust is about 12s in residing time in furnace, is the general technology gasification furnace residence time
1.5~3 times of (4~8s), gasification reaction is complete.In addition burnt by examination, find the applicable low activity coal of the gasification furnace, can be with
Effectively reduce production cost.
Embodiment two：Prior art is used under conditions of operating pressure is 4MPa, coal consumption is 1000t/d gasification
Lime-ash ratio reaches 5 in stove, running:5, unburned carbon in flue dust about 30%, it is seen that its flying dust amount is big, flying dust carbon residue is high, carbon conversion
Rate is low.Numerical computations checking is learnt：Coal dust is about 4s in residing time in furnace, and coal dust fails to carry out gasification reaction completely.In addition
Burnt by examination, it is found that the gasification furnace does not apply to low activity coal, can only the expensive high activity coal of applied cost, gasifier operation
Cost is high.
Claims (9)
1. a kind of U-shaped coal gasification reaction device of secondary separation slagging-off, it is characterised in that the U-shaped coal gasification of secondary separation slagging-off is anti-
Device is answered to be made up of gasification body of heater (4), horizontal flue (8) and useless pot (1)；It is described gasification body of heater (4) by gasifier nozzle (3),
Gasification hearth (5), water screen tube (6), cooling water pipe (14) and slag bath (9) composition；The useless pot (1) is by radiation heat transfer room, right
Flow Heat Room, middle furnace wall and syngas outlet (11) composition；Gasification hearth (5) is provided with the gasification body of heater (4), it is described
Gasification hearth (5) is surrounded by water screen tube (6), and the top of the gasification body of heater (4) is provided with gasifier nozzle (3), the gas
Change stove burner (3) with gasification hearth (5) to be connected, the bottom of the gasification body of heater (4) is provided with slag bath (9), the slag bath (9)
It is connected with gasification hearth (5)；The useless pot (1) is divided into radiation heat transfer room and convection heat-exchange chamber by middle furnace wall, described useless
The top of pot (1) is provided with exhaust gases passes to connect radiation heat transfer room and convection heat-exchange chamber, the bottom of the radiation heat transfer room
For second gasification room (2), the bottom of the second gasification room (2), which is provided with useless pot entrance, the second gasification room (2), to be set
There is reverse c-shape air-flow transfer (13), the reverse c-shape air-flow transfer (13) is arranged on the relative middle furnace wall of useless pot entrance
On, some groups of convection heating surfaces (12) are provided with the heat convection room, the bottom of the convection heat-exchange chamber is provided with synthesis
Gas exports (11)；The gasification body of heater (4) is connected with useless pot (1) by horizontal flue (8), and the two of the horizontal flue (8)
End is connected with gasification hearth (5) and second gasification room (2) respectively, the gasification body of heater (3), horizontal flue (8) and secondary gas
Change the coal gasification reaction area that room (2) constitute U-shaped；The interior stagger arrangement of the horizontal flue (8) or in-line arrangement have vertical scummer
(10), the scummer (10) is staggered by some cooling water pipes (14) and formed；The coal gasification reaction area of the U-shaped it is interior
Wall is laid with one layer of flame-proof thermal insulation material layer (7).
2. the U-shaped coal gasification reaction device of a kind of secondary separation slagging-off according to claim 1, it is characterised in that described to remove
Lateral clearance L in slag device (10) between adjacent cooling water pipe (14) is not less than 100mm, and longitudinal pitch d is not less than cooling water pipe
(14) 2.5 times of diameter.
3. the U-shaped coal gasification reaction device of a kind of secondary separation slagging-off according to claim 1, it is characterised in that described cold
But water pipe (14) material is identical with water screen tube (6).
4. a kind of U-shaped coal gasification reaction device of secondary separation slagging-off according to claim 1, it is characterised in that the gas
It is single burner to change stove burner (3), and the gasifier nozzle (3) is vertically arranged in the top of gasification body of heater (4), the gasification furnace
The axis of burner (3) and the axis of gasification hearth (5) coincide.
5. a kind of U-shaped coal gasification reaction device of secondary separation slagging-off according to claim 1, it is characterised in that the gas
Change stove burner (3) be arranged on gasification body of heater (4) upper side 4 burners, and 4 burners center line in gasification hearth
(5) center forms the circle of contact.
6. the coal gasifying process of secondary separation slagging-off is carried out using the device described in claim 1, it is characterised in that carry out secondary
The coal gasifying process of separation slagging-off is to carry out according to the following steps：
First, gasification hearth (5) internal pressure is set as 0.1~4MPa, and the running temperature of gasification hearth (5) is 1250 DEG C~1600
℃；
2nd, coal dust and gasifying agent are sent into gasification hearth (5) by gasifier nozzle (3), gasified in gasification hearth (5)
Reaction；When the ash content in pulverized coal particle is melted rapidly at high operating temperatures, molten slag is formed；A part of liquid of molten slag
State slag deposition flows into slag bath (9) on the internal face of gasification hearth (5), and along the internal face of gasification hearth (5), in slag bath
(9) discharged after being cooled down in；Remaining liquid slag, the synthesis gas of reaction generation and unreacting gas agent composition mixed airflow；Mixing
Air-flow enters second gasification room (2) by horizontal flue (8), when mixed airflow passes through horizontal flue (8), remaining liquid slag quilt
Scummer (10) in horizontal flue (8) is further trapped, the molten slag of collection at large with reaction generation synthesis gas and not
React gasifying agent and enter second gasification room (2)；By the stop of reverse c-shape air-flow transfer (13) in second gasification room (2),
Air-flow fast steering, the molten slag of entrainment is separated from air-flow, deposits to the bottom of second gasification room (2), Ran Houliu
Enter slag bath (9), meanwhile, the synthesis gas and unreacting gas agent for reacting generation are anti-in second gasification room (2) interior generation second gasification
Should, the synthesis gas ultimately generated；
3rd, the synthesis gas ultimately generated enters convection heat-exchange chamber by the exhaust gases passes on useless pot (1) top, in heat convection room
Heat is transmitted by convection heating surface (12), then by being flowed out by syngas outlet (11).
7. the U-shaped coal gasification reaction device according to claim 6 removed the gred using secondary separation carries out secondary separation slagging-off
Coal gasifying process, it is characterised in that second gasification room (2) exit gas temperature be 900 DEG C.
8. the U-shaped coal gasification reaction device according to claim 6 removed the gred using secondary separation carries out secondary separation slagging-off
Coal gasifying process, it is characterised in that the coal dust be low activity coal.
9. the U-shaped coal gasification reaction device according to claim 6 removed the gred using secondary separation carries out secondary separation slagging-off
Coal gasifying process, it is characterised in that the gasifying agent is the mixed gas that oxygen or oxygen are constituted with vapor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710317087.9A CN106987279A (en) | 2017-05-08 | 2017-05-08 | A kind of U-shaped coal gasification reaction device of secondary separation slagging-off and the coal gasifying process that secondary separation slagging-off is carried out using the device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710317087.9A CN106987279A (en) | 2017-05-08 | 2017-05-08 | A kind of U-shaped coal gasification reaction device of secondary separation slagging-off and the coal gasifying process that secondary separation slagging-off is carried out using the device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106987279A true CN106987279A (en) | 2017-07-28 |
Family
ID=59418211
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710317087.9A Pending CN106987279A (en) | 2017-05-08 | 2017-05-08 | A kind of U-shaped coal gasification reaction device of secondary separation slagging-off and the coal gasifying process that secondary separation slagging-off is carried out using the device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106987279A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108998098A (en) * | 2018-07-19 | 2018-12-14 | 山东大学 | A kind of slag tap, high-temperature coke loopback coal gasifying process and device |
| CN111849558A (en) * | 2020-07-27 | 2020-10-30 | 哈尔滨工业大学 | Spraying device for coal gasification slag removal system and application method thereof |
| CN111849559A (en) * | 2020-07-27 | 2020-10-30 | 哈尔滨工业大学 | Combined deslagging device of coal gasification system and application method thereof |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4270493A (en) * | 1979-01-08 | 1981-06-02 | Combustion Engineering, Inc. | Steam generating heat exchanger |
| US4425254A (en) * | 1978-06-29 | 1984-01-10 | Josef Langhoff | Slag removal method |
| US4647294A (en) * | 1984-03-30 | 1987-03-03 | Texaco Development Corp. | Partial oxidation apparatus |
| CN86106039A (en) * | 1985-10-30 | 1987-05-27 | 德国巴布考克工厂有限公司 | Be used to cool off the device of the hot gas that contains dust |
| US5980858A (en) * | 1996-04-23 | 1999-11-09 | Ebara Corporation | Method for treating wastes by gasification |
| CN1994865A (en) * | 2006-12-12 | 2007-07-11 | 华东理工大学 | Gasification device for two-stage gasification coupled with heat recovery and washing and its uses |
| CN101255362A (en) * | 2006-12-14 | 2008-09-03 | 西门子公司 | Entrained flow reactor for gasifying solid and liquid energy sources |
| CN101781586A (en) * | 2010-01-29 | 2010-07-21 | 上海锅炉厂有限公司 | High-temperature synthesis gas sensible heat recovery device |
| CN103160329A (en) * | 2013-03-22 | 2013-06-19 | 东方电气集团东方锅炉股份有限公司 | Coal water slurry water wall gasification furnace of waste heat boiler process |
| CN104745233A (en) * | 2015-02-12 | 2015-07-01 | 哈尔滨工业大学 | Device for integrally forming natural water cycle by gasifier water cycle and waste heat boiler |
| DE102014002842A1 (en) * | 2014-02-25 | 2015-08-27 | Linde Aktiengesellschaft | Method and apparatus for entrained flow gasification of high carbon material |
| CN204607941U (en) * | 2014-02-24 | 2015-09-02 | 西门子公司 | For transmitting the device of the waste material of high-temperature gasification Primordial Qi and fluid |
| CN105586093A (en) * | 2016-03-02 | 2016-05-18 | 上海锅炉厂有限公司 | Gasification reactor with partial heat recovery device and gasification method by using gasification reactor |
-
2017
- 2017-05-08 CN CN201710317087.9A patent/CN106987279A/en active Pending
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4425254A (en) * | 1978-06-29 | 1984-01-10 | Josef Langhoff | Slag removal method |
| US4270493A (en) * | 1979-01-08 | 1981-06-02 | Combustion Engineering, Inc. | Steam generating heat exchanger |
| US4647294A (en) * | 1984-03-30 | 1987-03-03 | Texaco Development Corp. | Partial oxidation apparatus |
| CN86106039A (en) * | 1985-10-30 | 1987-05-27 | 德国巴布考克工厂有限公司 | Be used to cool off the device of the hot gas that contains dust |
| US5980858A (en) * | 1996-04-23 | 1999-11-09 | Ebara Corporation | Method for treating wastes by gasification |
| CN1994865A (en) * | 2006-12-12 | 2007-07-11 | 华东理工大学 | Gasification device for two-stage gasification coupled with heat recovery and washing and its uses |
| CN101255362A (en) * | 2006-12-14 | 2008-09-03 | 西门子公司 | Entrained flow reactor for gasifying solid and liquid energy sources |
| CN101781586A (en) * | 2010-01-29 | 2010-07-21 | 上海锅炉厂有限公司 | High-temperature synthesis gas sensible heat recovery device |
| CN103160329A (en) * | 2013-03-22 | 2013-06-19 | 东方电气集团东方锅炉股份有限公司 | Coal water slurry water wall gasification furnace of waste heat boiler process |
| CN204607941U (en) * | 2014-02-24 | 2015-09-02 | 西门子公司 | For transmitting the device of the waste material of high-temperature gasification Primordial Qi and fluid |
| DE102014002842A1 (en) * | 2014-02-25 | 2015-08-27 | Linde Aktiengesellschaft | Method and apparatus for entrained flow gasification of high carbon material |
| CN104745233A (en) * | 2015-02-12 | 2015-07-01 | 哈尔滨工业大学 | Device for integrally forming natural water cycle by gasifier water cycle and waste heat boiler |
| CN105586093A (en) * | 2016-03-02 | 2016-05-18 | 上海锅炉厂有限公司 | Gasification reactor with partial heat recovery device and gasification method by using gasification reactor |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108998098A (en) * | 2018-07-19 | 2018-12-14 | 山东大学 | A kind of slag tap, high-temperature coke loopback coal gasifying process and device |
| CN111849558A (en) * | 2020-07-27 | 2020-10-30 | 哈尔滨工业大学 | Spraying device for coal gasification slag removal system and application method thereof |
| CN111849559A (en) * | 2020-07-27 | 2020-10-30 | 哈尔滨工业大学 | Combined deslagging device of coal gasification system and application method thereof |
| CN111849559B (en) * | 2020-07-27 | 2021-11-05 | 哈尔滨工业大学 | Combined deslagging device of coal gasification system and application method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101508915B (en) | Gasifying device for liquid fuel or solid fuel aqueous slurry | |
| CN102433160B (en) | Control method for biomass gasification equipment | |
| CN101781586B (en) | High-temperature synthesis gas sensible heat recovery device | |
| CA2452617A1 (en) | Method for producing clean energy from coal | |
| CN101906324A (en) | Indirect gasification process of biomass water vapor and equipment thereof | |
| CN102146301A (en) | Method for two-stage coal gasification on composite external heat fixed bed and gas furnace | |
| CN106867590A (en) | A kind of useless pot Quench integral type water-coal-slurry water cooled wall gasification furnace and gasification process | |
| CN106987279A (en) | A kind of U-shaped coal gasification reaction device of secondary separation slagging-off and the coal gasifying process that secondary separation slagging-off is carried out using the device | |
| CN104593085A (en) | Coal gasifier for slag granulation and coal gas preparation process | |
| CN107446628A (en) | A kind of new fixed bed slag gasification reacting furnace and its gas making method | |
| CN101550361A (en) | Under nozzle-type entrained flow gasification shock chilling device and shock chilling technology | |
| CN107099337A (en) | A kind of U-shaped coal gasification reaction device and the technique for carrying out coal gasification using the device | |
| CN104449872A (en) | Gasification process system for fine particle biomass or solid fossil fuel | |
| CN105154140B (en) | A kind of method and apparatus for the multistage air-flow bed coal-gasification for coupling high temperature shift | |
| CN110117497A (en) | A kind of low temperature distillation pyrolytic process system of double heat source low-order coals | |
| CN211497525U (en) | Gasifier capable of efficiently recovering energy | |
| CN206033675U (en) | Low tar gas device of dry distillation of jointly gasifying preparation | |
| CN107723031A (en) | High-pressure gasification and pyrolysis integrated device for pulverized coal | |
| CN105441131B (en) | A kind of method of coal gasification lime-ash oxidation and decarbonization ash content coproduction steam | |
| CN201770674U (en) | Biomass steam indirect gasification equipment | |
| CN103756730B (en) | Heat accumulating type powdered coal entrained bed gasification method | |
| CN106947541A (en) | A kind of combined method and system based on low order pyrolysis of coal water vapour quenching water-gas hydrogen manufacturing | |
| CN207193220U (en) | A kind of circulation fluidized bed coal gasifying Multi-stage cooling dust arrester | |
| CN107760379A (en) | Fluid bed and melting bed combined type catalytic coal gasification devices and methods therefor | |
| CN201660609U (en) | High-temperature synthesis gas sensible heat recovery plant |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170728 |