CN208814958U - A kind of dry coal powder airflow bed gasification system of low pressure - Google Patents
A kind of dry coal powder airflow bed gasification system of low pressure Download PDFInfo
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- CN208814958U CN208814958U CN201821350207.1U CN201821350207U CN208814958U CN 208814958 U CN208814958 U CN 208814958U CN 201821350207 U CN201821350207 U CN 201821350207U CN 208814958 U CN208814958 U CN 208814958U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
Abstract
The utility model discloses a kind of dry coal powder airflow bed gasification systems of low pressure, it includes pulverized coal bin, dosing valve, convey mixer, gasification furnace, gasification burner tip, fly ash separator, convection current is given up pot, flying dust washer, scrubbing tower and desulfurizer, pulverized coal bin is connected by dosing valve with conveying mixer, conveying mixer is connected with gasification burner tip, gasification burner tip is mounted on top of gasification furnace, gasification furnace is by gasification combustion chamber, radiation waste pot, slag bath composition, gasification combustion chamber, the side wall of the radiation waste pot and the slag bath is made of water-cooling wall, radiation waste pot side wall is equipped with the first gas exit, first gas exit is connected with the first gas entry of fly ash separator, second gas exit of fly ash separator and the useless pot of convection current, flying dust washer, scrubbing tower and desulfurizer are sequentially connected.The utility model solves the problems, such as that high equipment cost present in existing dry coal powder airflow bed gasification technology, dry pulverized coal feed stability difference are low with integrated heat efficiency.
Description
Technical field
The utility model relates to coal gas technology fields, and in particular to a kind of low pressure dry coal powder airflow bed coal-gasification system
System.
Background technique
Industrial combustion gas is mainly used in the burning occasion of normal pressure or low pressure, in the industrial combustion gas field in China, due to natural
It gas shortage of resources and is influenced by combustion gas cost, mainly generates coal gas using coal gasification, for meeting ceramics, metallurgy, papermaking
Etc. industries demand on gas.Compared with fixed bed and the coal gasification mode of fluidized bed, air-flow bed coal-gasification has efficiency of carbon con version high
The advantages that easy to handle with coal gasification waste water, receives more and more attention under the trend of energy-saving and emission-reduction.Air-flow bed coal-gasification point
Two ways is fed for water-coal-slurry charging and dry pulverized coal, high, oxygen consumes low advantage, dry coal with cold gas efficiency for dry pulverized coal charging
Powder airflow bed Coal Gasification Technology is suitable for coal gas burning field.
The dry coal powder airflow bed Coal Gasification Technology of industrial comparative maturity includes Shell Coal Gasification Technology and GSP coal at present
Gasification technology is mainly used in field chemical industry synthesis (about 4MPa) of high pressure, belongs to high-pressure system, however high-pressure system no matter
Device fabrication still during operation, all haves the shortcomings that at high cost, risk is high, if being directly applied to the combustion of low pressure coal system
Following disadvantage will be present in gas field: (1) pulverized coal conveying device uses normal pressure powder cabin-lock hopper-high pressure powder cabin form, and gasification furnace uses
Pressure-bearing steel shell and water wall structure, gasification furnace slag discharge use lock hopper structure, these settings cause apparatus structure complicated, equipment manufacturing cost
It is high；(2) for dry pulverized coal feed using material issuance tank fluidizing type feed and pneumatic conveying method, dry pulverized coal feed stability is poor, influences gas
Change the stable operation of furnace；(3) coal gas of high temperature Exposure degree is incomplete, causes energy dissipation, the synthesis thermal effect that coal combustion gas utilizes
Rate is low.
Utility model content
The purpose of this utility model is to provide a kind of dry coal powder airflow bed gasification systems of low pressure, ask as follows to solve
Topic: (1) the powder airflow bed coal combustion gas of high pressure dry coal is at high cost, risk is high；(2) high pressure dry coal is powder airflow bed directly applies to low pressure
When coal combustion gas, high equipment cost, dry pulverized coal feed stability is poor, gasifier operation stability is poor, Exposure degree rate is low, comprehensive
It is low to close the thermal efficiency.
To achieve the above object, the utility model provides a kind of dry coal powder airflow bed gasification system of low pressure comprising
Pulverized coal bin, dosing valve, conveying mixer, gasification furnace, gasification burner tip, fly ash separator and the useless pot of convection current, the coal dust
Storehouse is connect by the dosing valve with the first coal powder entrance of the conveying mixer, and the dosing valve is rotation
Valve, the conveying mixer are venturi mixer, and the gasification furnace includes the gasification combustion for being arranged and being sequentially communicated from top to bottom
Burn room, radiation waste pot and slag bath, the gasification burner tip be mounted on the top of the gasification combustion chamber and with the gasification, and combustion
Room connection, the second coal powder entrance of the gasification burner tip is connect with the second discharge of the conveying mixer, in the gas
The side wall for changing combustion chamber is externally provided with water-cooling wall a, water-cooling wall b is externally provided in the side wall of the radiation waste pot, in the side of the slag bath
Wall is externally provided with water-cooling wall c, is equipped with the first gas exit, the first coal of the radiation waste pot in the sidewall bottom of the radiation waste pot
Gas outlet connect with the first gas entry of the fly ash separator, the second gas exit of the fly ash separator with it is described right
The second gas entry connection of useless pot is flowed, the fly ash separator is cyclone separator.
In certain pressure differential range, rotary valve can will be in the pulverized coal bin of normal pressure and described defeated in low pressure
It send mixer to keep apart, avoids gas from being leapt up by the conveying mixer is counter into the pulverized coal bin, influence coal dust feed.This
Outside, it is rotated by the steady and continuous of cell compartment in rotary valve, coal dust uniformly continuous feed may be implemented, by the rotation for adjusting cell compartment
Speed, adjustable coal dust delivery rate.
In venturi mixer, conveying gas is accelerated, the conveying gas of high speed due to local constriction in flow area
It is sufficiently mixed with the pulverized coal particle for entering venturi mixer, avoids pulverized coal particle and assemble blocking pipeline in the duct.In addition,
Pressure in venturi mixer due to local gas velocity raising and reduce, to reduce the work pressure of the dosing valve
Difference reduces its gas blowby possibility.
Cyclone separator separates ash particle most of in coal gas, reduces dust content of gas, that is, avoids flying dust
Grain deposits blocking in subsequent pipeline, and can improve the coefficient of heat transfer and waste heat recovery rate, while reducing the negative of subsequent wet dedusting
Lotus.Preferably, cyclone separator is made of the water wall structure of interior deposited wearing-proof refractory material.
Wherein, the gasification burner tip is equipped with multiple, top array of multiple gasification burner tips in the gasification combustion chamber
Distribution.Since vapor pressure is lower, coal gasification reaction rate is lower, can strengthen gas-solid by the way that multiple gasification burner tips are arranged
Contact and mixing, improve gas-solid reaction rate, reduce due to the lower influence to gasification reaction rate of pressure.
Wherein, the water-cooling wall of the gasification combustion chamber, the radiation waste pot and the slag bath is integral type water-cooling wall.One
Formula water-cooling wall manufactures, is easy to installation and maintenance, and one body swimming cold wall can be born between low pressure gasifying furnace interior and external environment
Pressure difference, due to eliminating the pressure-bearing steel shell in high pressure coal gasification technology, to reduce integrated gasification furnace manufacturing cost.
Wherein, it being exported in the bottom of the slag bath equipped with pulp water, the pulp water outlet of the slag bath is connect with deslagging water installations,
The deslagging water installations are angle valve.Angle valve can bear the gasification furnace slag bath and external pressure difference, and can continuously arrange
The pulp water for bottom of pond portion of slagging tap.By the aperture regulation gasification furnace slag discharge rate for adjusting angle valve.Due to eliminating high pressure coal gasification skill
Intermittent lock hopper system in art reduces integrated gasification furnace manufacturing cost to simplify deslagging water system.
Wherein, ash outlet, the ash outlet of the fly ash separator and ash-valve are equipped in the bottom of the fly ash separator
Connection, the ash-valve are rotary valve.Rotary valve can by low pressure the fly ash separator and external atmospheric pressure environment every
It leaves, avoids inflammable and explosive coal gas from leaking from fly ash separator and safety accident occurs.In addition, passing through cell compartment in rotary valve
The discharge of ash particle uniformly continuous may be implemented in steady and continuous rotation, adjustable by adjusting the speed of rotation of rotary valve cell compartment
Ash discharge rate.
Wherein, the dry coal powder airflow bed gasification system of the low pressure further includes flying dust washer, scrubbing tower and desulfurization dress
It sets, the flying dust washer is Venturi scrubber, third gas entry and the useless pot of the convection current of the flying dust washer
The connection of third gas exit, the 4th gas exit of the flying dust washer are connect with the 4th gas entry of the scrubbing tower,
5th gas exit of the scrubbing tower is connect with the 5th gas entry of the desulfurizer, on the side wall top of the scrubbing tower
Portion is equipped with washing water inlet, is equipped with gray water outlet in the bottom of the scrubbing tower.
The utility model has the advantages that
(1) a kind of dry coal powder airflow bed gasification system of low pressure is provided, high-pressure system is not used, reduce costs and
Risk；(2) pulverized coal conveying device, gasification furnace structure and gasification furnace slag discharge system are simplified, eliminates high pressure dry coal powder
The lock hopper and high pressure powder cabin equipment used in air-flow bed coal-gasification technology, eliminates gasification furnace pressure-bearing steel shell structure, eliminates gas
Change fire grate dreg-locking hopper, to save equipment investment, reduces equipment manufacturing cost；(3) coal dust feed-type is optimized, using quantitatively giving
Material valve and conveying mixer mode are fed, and are fed stable, high reliablity, easy to operate, improve the stability of gasification furnace；(4) lead to
The useless pot of overshoot and the useless pot of convection current recycle coal gas of high temperature sensible heat completely, improve Exposure degree rate, integrated heat efficiency is high.
Detailed description of the invention
Fig. 1 is the structural schematic diagram for the dry coal powder airflow bed gasification system of low pressure that embodiment 1 provides.
Fig. 2 is the flow chart for the dry coal powder airflow bed coal gasification method of low pressure that embodiment 2 provides.
In figure: 100- pulverized coal bin, the first discharge of 110-, 200- dosing valve, 210- pan feeding valve port, 220- discharging
Valve port, 300- convey mixer, the first coal powder entrance of 310-, and 320- conveys gas entrance, the second discharge of 330-, 400- gasification
Burner, the second coal powder entrance of 410-, 420- oxidant inlet, 500- gasification furnace, 510- gasification combustion chamber, 511- water-cooling wall a,
520- radiation waste pot, the first gas exit of 521- water-cooling wall b, 522-, 530- slag bath, the outlet of 531- water-cooling wall c, 532- pulp water,
600- deslagging water installations, 610- inlet, 620- leakage fluid dram, 700- fly ash separator, the first gas entry of 710-, 720- ash go out
Mouthful, the second gas exit of 730-, 800- ash-valve, 810- ash inlet, 820- ash discharging hole, 900- convection current gives up pot, the second coal of 910-
Gas entrance, 920- third gas exit, 1000- flying dust washer, 1010- third gas entry, the 4th gas exit of 1020-,
1100- scrubbing tower, the 4th gas entry of 1110-, the washing water inlet 1120-, 1130- gray water outlet, the 5th coal gas of 1140- go out
Mouthful, 1200- desulfurizer, the 5th gas entry of 1210-, the 6th gas exit of 1220-.
Specific embodiment
The following examples illustrate the utility model, but is not intended to limit the scope of the present invention.
Embodiment 1
As shown in Figure 1, embodiment 1 provides a kind of dry coal powder airflow bed gasification system of low pressure comprising pulverized coal bin
100, dosing valve 200, conveying mixer 300, gasification furnace 500, gasification burner tip 400, fly ash separator 700, the useless pot of convection current
900, flying dust washer 1000, scrubbing tower 1100 and desulfurizer 1200 are equipped with the first coal in the bottom of the pulverized coal bin 100
Powder outlet 110, the first discharge 110 is connect with the pan feeding valve port 210 of the dosing valve 200, dosing valve 200
Discharging valve port 220 is connect with the first coal powder entrance 310 of the conveying mixer 300, and the dosing valve 200 is rotation
Valve, the conveying mixer 300 are venturi mixer, and the gasification furnace 500 includes being arranged and being sequentially communicated from top to bottom
Gasification combustion chamber 510, radiation waste pot 520 and slag bath 530, the gasification burner tip 400 are mounted on the gasification combustion chamber 510
Top is simultaneously connected to the gasification combustion chamber 510, and the second coal powder entrance 410 of the gasification burner tip 400 is mixed with the conveying
Second discharge 330 of device 300 connects, and water-cooling wall a511 is externally provided in the side wall of the gasification combustion chamber 510, in the spoke
The side wall for penetrating useless pot 520 is externally provided with water-cooling wall b521, water-cooling wall c531 is externally provided in the side wall of the slag bath 530, in the spoke
Penetrate useless pot 520 sidewall bottom be equipped with the first gas exit 522, the first gas exit 522 of the radiation waste pot 520 with it is described
First gas entry 710 of 700 side wall upper part of fly ash separator connects, and second coal gas at 700 top of fly ash separator goes out
Mouth 730 is connect with second gas entry 910 at useless 900 top of pot of the convection current, and the fly ash separator 700 is cyclonic separation
Device is made of the water wall structure of interior deposited wearing-proof refractory material, and the flying dust washer 1000 is Venturi scrubber, described to fly
The third gas entry 1010 of grey washer 1000 is connect with the third gas exit 920 of the useless pot 900 of the convection current, the flying dust
4th gas exit 1020 of washer 1000 is connect with the 4th gas entry 1110 of 1100 sidewall bottom of scrubbing tower, institute
The 5th gas exit 1140 for stating scrubbing tower 1100 is connect with the 5th gas entry 1210 of the desulfurizer 1200, in desulfurization
The top of device 1200 is equipped with the 6th gas exit 1220, and the 6th gas exit 1220 connects with gas pipeline (not shown)
It connects, is equipped with washing water inlet 1120 in the top side wall of the scrubbing tower 1100, is equipped with ash in the bottom of the scrubbing tower 1100
Water out 1130.
In the present embodiment, conveying mixer 300 is additionally provided with conveying gas entrance 320, conveying gas entrance 320 and conveying gas
The connection of pipeline (not shown), conveying the conveying gas in feed channel is nitrogen or carbon dioxide.
In the present embodiment, gasification burner tip 400 is additionally provided with oxidant inlet 420, oxidant inlet 420 and oxidant conduit
(not shown) connection, oxidant are the mixture of oxygen and vapor.
In the present embodiment, the gasification burner tip 400 is equipped with multiple, and multiple gasification burner tips 400 are fired in the gasification
The top array distribution of room 510 is burnt, since the pressure of gasification reaction is lower, coal gasification reaction rate is lower, multiple by being arranged
Gasification burner tip 400 can strengthen gas-solid contact and mixing, improve gas-solid reaction rate, reduce since pressure is lower to gasification reaction
The influence of rate.
In the present embodiment, the water-cooling wall of the gasification combustion chamber 510, the radiation waste pot 520 and the slag bath 530 is
One body swimming cold wall, the manufacture of one body swimming cold wall, installation and easy to maintenance, can bear the inside of low pressure gasifying furnace 500 and
Pressure difference between external environment, due to eliminating the pressure-bearing steel shell in high pressure coal gasification technology, to reduce integrated gasification
500 manufacturing cost of furnace.
In the present embodiment, pulp water outlet 532, the pulp water outlet of the slag bath 530 are equipped in the bottom of the slag bath 530
532 connect with the inlet 610 of deslagging water installations 600, are equipped with leakage fluid dram 620, the deslagging in the bottom of deslagging water installations 600
Water installations 600 are angle valve, and deslagging water installations 600 can bear the slag bath 530 and external pressure difference of 500 bottom of gasification furnace, and
The pulp water of 530 bottom of slag bath can continuously be discharged, the aperture regulation by adjusting deslagging water installations 600 (angle valve) 600 gasifies
The deslagging rate of furnace 500, due to eliminating the intermittent lock hopper system in high pressure coal gasification technology, to simplify deslagging water
System reduces 500 manufacturing cost of gasification furnace.
In the present embodiment, ash outlet 720, the fly ash separator 700 are equipped in the bottom of the fly ash separator 700
Ash outlet 720 connect with the ash inlet 810 of ash-valve 800, the bottom of ash-valve 800 is equipped with ash discharging hole 820, the ash-valve
800 be that rotary valve, raw gas and fly ash granule carry out gas solid separation, wherein most fly ash granule in fly ash separator 700
It by 720 discharge of ash outlet of fly ash separator 700, and is discharged by ash-valve 800, wherein ash-valve 800 can will be in
The fly ash separator 700 of low pressure and external atmospheric pressure environment are kept apart, and inflammable and explosive coal gas is avoided to let out from fly ash separator 700
Safety accident occurs for leakage, in addition, ash particle may be implemented and uniformly connect by the steady and continuous rotation of the cell compartment in ash-valve 800
Continuous discharge, by adjusting the speed of rotation of cell compartment, adjustable ash discharge rate.
When system works, the coal dust in pulverized coal bin 100 is passed through conveying mixer 300 by dosing valve 200,
In 10bar pressure differential range, dosing valve 200 can be by the pulverized coal bin 100 in normal pressure and the conveying mixer in low pressure
300 keep apart, and gas is avoided to be leapt up by conveying mixer 300 is counter into pulverized coal bin 100, influence coal dust feed, in addition, by fixed
Coal dust uniformly continuous feed may be implemented in stabilization, the continuous rotation for measuring the cell compartment in feed valve 200, by the rotation for adjusting cell compartment
Rotary speed, adjustable coal dust delivery rate.
In conveying mixer 300, conveying gas is due to local constriction in flow area (conveying 300 internal structure of mixer
Cause) and be accelerated, the conveying gas of high speed is sufficiently mixed with the pulverized coal particle for entering conveying mixer 300, avoids coal dust
Particle assemble in the duct blocking pipeline, in addition, conveying mixer 300 in pressure due to local gas velocity raising and reduce,
To reduce the operting differential pressure of dosing valve 200, reduce its gas blowby possibility, coal dust in conveying mixer 300 with it is defeated
It supplies gas and is sent into gasification burner tip 400 after mixing.
Coal dust and oxidant pass through gasification burner tip 400 and are passed through gasification furnace 500, in the gasification combustion chamber 510 of gasification furnace 500
Gasification reaction occurs and generates raw gas, the ash content in coal dust melts in an environment of high temperature becomes grey solid impurity particle, wherein oxidant
In vapor volume fraction be 0~50%, pass through change the adjustable fuel gas of vapor volume fraction in hydrogen content.
Raw gas and grey solid impurity particle are passed through in the radiation waste pot 520 of gasification furnace 500 and cool to 700~800 DEG C, in cooling procedure
In, the water-cooling wall of radiation waste pot 520 carries out first time Exposure degree, and the biggish grey solid impurity particle of partial size falls into 500 bottom of gasification furnace
Slag bath 530, the raw gas of entrainment small particle fly ash granule is passed through flying dust by the first gas exit 522 of radiation waste pot 520
Separator 700.
Raw gas and fly ash granule carry out gas solid separation in fly ash separator 700, and the raw gas after gas solid separation passes through
Second gas exit 730 of fly ash separator 700 is passed through the useless pot 900 of convection current.Fly ash separator 700 is by most of grey in coal gas
Grain separates, and reduces dust content of gas, that is, avoids fly ash granule and deposit blocking in subsequent pipeline, and can improve heat exchange system
Several and Exposure degree rate, while reducing the load of subsequent wet dedusting.
Raw gas is passed through flying dust washer 1000 after convection current gives up and is further cooled to 200~300 DEG C in pot 900, cools down
Second of Exposure degree is carried out in the process, and the flying dust in raw gas is captured in flying dust washer 1000, is captured down
The flying dust come is passed through scrubbing tower 1100 together with raw gas, and remaining flying dust is further caught in scrubbing tower 1100 in raw gas
It catches, raw gas is passed through desulfurizer 1200 after sufficiently washing in scrubbing tower 1100, the buck mixing in scrubbing tower 1100
Object is discharged by gray water outlet 1130, and after raw gas passes through 1200 desulfurization of desulfurizer, clean gas is made.
Embodiment 2
As shown in Fig. 2, embodiment 2 provides a kind of method of low pressure dry coal powder airflow bed coal-gasification, it makes use of implementations
The dry coal powder airflow bed gasification system of low pressure in example 1 comprising following steps:
Step 1, the low pressure supply of coal dust；
Coal dust under normal pressure state in pulverized coal bin is passed through the conveying mixer under low-pressure state by dosing valve, it is fixed
Amount feed valve is continuously and uniformly fed while pulverized coal bin and conveying mixer is isolated, and coal dust is in conveying mixer and from defeated
The conveying gas for sending the conveying gas entrance of mixer to enter is sent into gasification burner tip after evenly mixing；
Step 2, gasification reaction and first time Exposure degree；
Coal dust is passed through gasification furnace, the oxidation that simultaneous oxidation agent passes through gasification burner tip by the second coal powder entrance of gasification burner tip
Agent entrance is passed through gasification furnace, and gasification reaction occurs in the gasification, and combustion room on gasification furnace top and generates raw gas, during this,
Ash content in coal dust melts in an environment of high temperature becomes grey solid impurity particle, and raw gas and grey solid impurity particle carry a large amount of sensible heats and be passed through gas
Change the radiation waste pot in the middle part of furnace, and carries out first time Exposure degree in radiation waste pot and make raw gas and the cooling drop of grey solid impurity particle
Temperature, the biggish solid impurity particle of partial size fall into the slag bath of gasification furnace bottom, and the raw gas of entrainment small particle fly ash granule passes through radiation waste
First gas exit of pot sidewall bottom is passed through fly ash separator；
Step 3, gas solid separation；
Raw gas and fly ash granule carry out gas solid separation in fly ash separator, and wherein most fly ash granule passes through flying dust
The ash outlet discharge of separator, raw gas are passed through the useless pot of convection current by the second gas exit of fly ash separator；
Step 4, second of Exposure degree and washing；
Raw gas gives up in convection current and carries out second of Exposure degree in pot, and the raw gas after cooling is passed through flying dust washer, slightly
Flying dust in coal gas is captured in flying dust washer, and the flying dust to get off that is captured is passed through scrubbing tower together with raw gas,
Remaining flying dust is further captured in scrubbing tower in raw gas, and raw gas is passed through after being washed thoroughly in scrubbing tower
Desulfurizer, the grey aqueous mixtures in scrubbing tower pass through gray water outlet and are discharged；
Step 5, desulfurization；
After raw gas passes through desulfurizer desulfurization, clean gas is made.
In step 1, pulverized coal flow is adjusted by adjustment quantitative feed valve, to adjust the load of coal combustion gas.
In step 2, oxidant is the mixture of oxygen and vapor, by the volume point for changing vapor in oxidant
Hydrogen content and calorific value in the adjustable fuel gas of number；Pulp water in slag bath is continuously discharged by deslagging water installations, is passed through
Deslagging water installations are adjusted to adjust gasification furnace slag discharge rate.
In step 2, the vapor volume fraction in oxidant is 0~50%.
In step 2, raw gas and grey solid impurity particle are passed through in the radiation waste pot of gasification furnace and cool to 700~800 DEG C.
In step 3, pass through the ash-valve with ash outlet connection from the fly ash granule of the ash outlet discharge of fly ash separator
Discharge, by adjusting ash-valve to adjust ash discharge rate.
In step 4, raw gas gives up in convection current and is cooled to 200~300 DEG C in pot.
Although above having made detailed description to the utility model with generality explanation and specific embodiment,
On the basis of the utility model, it can be made some modifications or improvements, this is apparent to those skilled in the art
's.Therefore, these modifications or improvements on the basis of without departing from the spirit of the present invention, belong to the utility model and want
Seek the range of protection.
Claims (6)
1. a kind of dry coal powder airflow bed gasification system of low pressure, which is characterized in that the low pressure dry coal powder airflow bed coal-gasification system
System include pulverized coal bin (100), dosing valve (200), conveying mixer (300), gasification furnace (500), gasification burner tip (400),
Fly ash separator (700) and convection current are given up pot (900), the pulverized coal bin (100) by the dosing valve (200) with it is described
The first coal powder entrance (310) connection of mixer (300) is conveyed, the dosing valve (200) is rotary valve, and the conveying is mixed
Clutch (300) is venturi mixer, and the gasification furnace (500) includes the gasification combustion chamber for being arranged and being sequentially communicated from top to bottom
(510), radiation waste pot (520) and slag bath (530), the gasification burner tip (400) are mounted on the gasification combustion chamber (510)
Top is simultaneously connected to the gasification combustion chamber (510), the second coal powder entrance (410) of the gasification burner tip (400) with it is described defeated
It send the second discharge (330) of mixer (300) to connect, is externally provided with water-cooling wall a in the side wall of the gasification combustion chamber (510)
(511), water-cooling wall b (521) are externally provided in the side wall of the radiation waste pot (520), are externally provided in the side wall of the slag bath (530)
Water-cooling wall c (531) is equipped with the first gas exit (522) in the sidewall bottom of the radiation waste pot (520), the radiation waste pot
(520) the first gas exit (522) is connect with the first gas entry (710) of the fly ash separator (700), the flying dust
The second gas exit (730) of separator (700) is connect with second gas entry (910) of the convection current useless pot (900), described
Fly ash separator (700) is cyclone separator.
2. the dry coal powder airflow bed gasification system of low pressure according to claim 1, which is characterized in that the gasification burner tip
(400) it is equipped with multiple, top array distribution of multiple gasification burner tips (400) in the gasification combustion chamber (510).
3. the dry coal powder airflow bed gasification system of low pressure according to claim 1, which is characterized in that the gasification combustion chamber
(510), the water-cooling wall of the radiation waste pot (520) and the slag bath (530) is integral type water-cooling wall.
4. the dry coal powder airflow bed gasification system of low pressure according to claim 1, which is characterized in that in the slag bath
(530) bottom is equipped with pulp water outlet (532), and the pulp water outlet (532) and deslagging water installations (600) of the slag bath (530) is even
It connects, the deslagging water installations (600) are angle valve.
5. the dry coal powder airflow bed gasification system of low pressure according to claim 1, which is characterized in that separated in the flying dust
The bottom of device (700) is equipped with ash outlet (720), and the ash outlet (720) and ash-valve (800) of the fly ash separator (700) is even
It connects, the ash-valve (800) is rotary valve.
6. the dry coal powder airflow bed gasification system of low pressure described in any one of -5 according to claim 1, which is characterized in that institute
Stating the dry coal powder airflow bed gasification system of low pressure further includes flying dust washer (1000), scrubbing tower (1100) and desulfurizer
(1200), the flying dust washer (1000) is Venturi scrubber, the third gas entry of the flying dust washer (1000)
(1010) it is connect with the third gas exit (930) of the convection current useless pot (900), the 4th coal of the flying dust washer (1000)
Gas outlet (1020) is connect with the 4th gas entry (1110) of the scrubbing tower (1100), and the 5th of the scrubbing tower (1100) the
Gas exit (1140) is connect with the 5th gas entry (1210) of the desulfurizer (1200), in the scrubbing tower (1100)
Top side wall be equipped with washing water inlet (1120), the bottom of the scrubbing tower (1100) be equipped with gray water outlet (1130).
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| CN108795502A (en) * | 2018-08-21 | 2018-11-13 | 北京清创晋华科技有限公司 | A kind of dry coal powder airflow bed gasification system of low pressure and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108795502A (en) * | 2018-08-21 | 2018-11-13 | 北京清创晋华科技有限公司 | A kind of dry coal powder airflow bed gasification system of low pressure and method |
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