CN208776672U - A kind of manifold type gasification system - Google Patents
A kind of manifold type gasification system Download PDFInfo
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- CN208776672U CN208776672U CN201821354065.6U CN201821354065U CN208776672U CN 208776672 U CN208776672 U CN 208776672U CN 201821354065 U CN201821354065 U CN 201821354065U CN 208776672 U CN208776672 U CN 208776672U
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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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Abstract
The utility model discloses a kind of manifold type gasification systems, belong to Coal Clean efficient technique of rainwater utilization field.A kind of manifold type gasification system includes the gasification system being sequentially connected, residual neat recovering system, dust pelletizing system and the flying dust circulatory system, airflow bed gasification furnace is connected to fluidized-bed gasification furnace downstream, wherein residual neat recovering system uses multiloop waste heat recovery mode, system thermal is made full use of, the thermal efficiency is improved；And gasification system further includes cyclone mixer, entrained flow gasification furnace upper end is provided with gasification burner tip, and the flying dust circulatory system is connected with gasification burner tip, changes the feeding manner of coal dust, flying dust and gasifying agent, so that gasification reaction is more thorough, efficiency of carbon con version is significantly improved.
Description
Technical field
The utility model belongs to Coal Clean efficient technique of rainwater utilization field, specifically, being related to a kind of manifold type coal gasification
System.
Background technique
Coal Gasification Technology is one of the important channel that Coal Clean efficiently utilizes.Currently, common coal gasifying process according to
Fuel motion conditions different in furnace, are broadly divided into 4 classes: fixed bed, fluidized bed, air flow bed and melting bed.In contrast,
Fluidized bed and entrained flow bed gasification technology are because of the discharge in gasification without tar and phenol, and produced coal gas clean-up performance is higher,
Wider application is industrially obtained, it has also become the mainstream technology of cleaning coal gas preparation.But in existing Coal Gasification Technology,
Due to the technical characterstic of the design feature and reaction in furnace temperature of fluidized-bed gasification furnace lower (1000 DEG C or so), institute's producing coal gas
In contain the complete coal particle of a large amount of unreacteds, efficiency of carbon con version is low and there is a problem that flying dust amount is big and Residual carbon is high, conventional
Processing mode is to be sent to Industrial Boiler or boiler of power plant burns, but due to flying dust fugitive constituent is extremely low, kindling is difficult,
The problems such as be easy to causeing burner hearth coking, therefore the problem always during fluidized gasification Technique Popularizing；And entrained flow gasification
For technology since its reaction temperature is higher (1500 DEG C or so), efficiency of carbon con version is high, has become the mainstream hair of Coal Gasification Technology in recent years
Open up direction.But airflow bed gasification furnace is higher to coal Particle size requirements, it is desirable that coal partial size is less than 0.1mm, needs to increase pulverized coal preparation system
System, increases equipment and system investments.
Chinese invention patent application number 201710500836.1, publication number CN107118809A, publication date 2017-09-01
Patent document disclose a kind of air flow bed and combine cycle gasification system and its two-part gasification process with recirculating fluidized bed.The hair
Bright combination cycle gasification system, including the air flow bed interconnected and recirculating fluidized bed, entrained flow gasification uses whole system
Flying dust as raw material, flying dust recycles, and improves the utilization rate of solid fuel, and recirculating fluidized bed gasification is produced using air flow bed
Certain temperature and pressure flue gas as First air and gasifying agent, the recycling of flue gas makes recirculating fluidized bed without lasting supplement
First air and gasifying agent generate recirculating fluidized bed by adjusting the pressure of air flow bed, the mass ratio of oxygen and flying marking
Imflammable gas product pressure, calorific value adjustable extent are big, can be realized flying dust zero-emission, fuel comprehensive utilization ratio reach 99% with
On；The method that the invention changes conventional process recirculating fluidized bed flying dust has reached and has rationally utilized the carbon residue in flying dust, improves
The purpose of solid fuel utilization rate.Although but the invention has the disadvantage that one that recirculating fluidized bed gasification is produced using air flow bed
The flue gas of temperature, pressure is determined as First air and gasifying agent, but gasifies agent content in the flue gas generated after air flow bed is reacted not
Foot easily causes its reaction not exclusively directly as the gasifying agent of fluidized gasification, and fluidized bed bed drain purge and flying dust amount is caused to increase
Greatly, and the phosphorus content of slag and unburned carbon in flue dust increase, and efficiency of carbon con version reduces.
Chinese invention patent application number 201610644936.7, publication number CN106118750A, publication date 2016-11-16
Patent document disclose a kind of step combination bed gasification system, it includes: coal supply unit, one which, which combines bed gasification system,
Grade fluid bed gasification unit, secondary air flow bed gasification unit, waste heat recovery unit, waste residue collector unit；Coal supply unit and one
Grade fluid bed gasification unit connection, level-one fluid bed gasification unit are connected to secondary air flow bed gasification unit, secondary air flow bed gas
Change unit to be connected to waste heat recovery unit, waste heat recovery unit is connected to waste residue collector unit.The step combination cot gas of the invention
Change system can carry out step gasification to coal dust, realize the Efficient Conversion of coal.But the invention has the disadvantage that its waste heat returns
Unit is received using the heat in radiation heat transfer room and convection heat-exchange chamber gas recovery, the recycled produced steam of heat does not obtain
It is made full use of to system itself, the thermal efficiency is lower；And it still will be present in the coal gas generated through the reaction of secondary air flow bed gasification furnace
The flying dust of a certain amount of complete fine particle of unreacted can not be discharged in the form of slag from furnace bottom, and as produced coal gas enters
Follow-up system then needs the flying dust to entrained in its coal gas to be separated and efficiently used.
Summary of the invention
1, it to solve the problems, such as
For the problem that coal efficiency of carbon con version existing in the prior art is low, waste heat recovery efficiency is not high, the utility model
A kind of manifold type gasification system is provided.The design feature of the utility model combination fluidized-bed gasification furnace and airflow bed gasification furnace and
Respective gasification reaction technical characterstic, carries out the coupling of the two, and improves simultaneously to gasification system, allows coal dust or flying dust can
To carry out efficient gasification reaction with gasifying agent, the efficiency of carbon con version of coal is improved, and whole system makes full use of coal gas waste heat,
Significantly reduce the energy consumption of gasification system.
2, technical solution
In order to achieve the above objectives, the utility model adopts the following technical solutions:
A kind of manifold type gasification system, including be sequentially connected gasification system, residual neat recovering system, dust pelletizing system and fly
The grey circulatory system, the gasification system include fluidized-bed gasification furnace and airflow bed gasification furnace, and the airflow bed gasification furnace connects
It connects in the fluidized-bed gasification furnace downstream,
The residual neat recovering system includes waste heat boiler, preheater, drum and waste-heat recoverer, the air flow bed gas
Change furnace, waste heat boiler, preheater and waste-heat recoverer are sequentially connected, the drum respectively with the airflow bed gasification furnace,
The waste heat boiler and the waste-heat recoverer are bi-directionally connected, and the drum also passes through the preheater and fluidisation
Bed gasification furnace, airflow bed gasification furnace are connected；
The gasification system further includes cyclone mixer, the cyclone mixer respectively with the fluidized-bed gasification furnace
Output end, the airflow bed gasification furnace input terminal are connected；The entrained flow gasification furnace upper end is provided with gasification burner tip, described
The flying dust circulatory system be connected with the gasification burner tip.
It preferably, further include gasifying agent supply equipment, the gasifying agent supply equipment is distinguished by the preheater
It is connected with the gasification burner tip, the fluidized-bed gasification furnace.
Preferably, the gasification burner tip is at least arranged three, and the gasification burner tip is along entrained flow gasification producer gas
The setting of entrance external circumferential.
Preferably, nozzle cover is provided with outside the gasification burner tip.
Preferably, the first water-cooling wall is provided in the airflow bed gasification furnace.
Preferably, refractory material is laid in first water-cooling wall.
Preferably, at least two layers of second water-cooling walls, the second water-cooling wall described in two layers are provided in the waste heat boiler
Between formed coal gas baffling channel, the coal gas baffling channel is connected with the gas exit of the waste heat boiler.
3, beneficial effect
Using technical solution provided by the utility model, have the advantages that compared with prior art
(1) a kind of manifold type gasification system of the utility model, wherein residual neat recovering system uses multiloop waste heat
Way of recycling carries out heat recovery, and the heating gas for generation of gasifying successively passes through waste heat boiler, preheater and waste-heat recoverer, by
Grade reduces heating gas temperature, has simultaneously effective recycled the heat in heating gas, byproduct steam carries out energy to greatest extent
Recycling and utilization, the thermal efficiency significantly improves；The utility model advanced optimizes gasification workshop section simultaneously, increases whirlwind mixing
Device, while gasification burner tip is provided on airflow bed gasification furnace, coal dust can be sprayed into air flow bed gas by one side cyclone mixer
Change furnace progress second gasification and greatly improves the efficiency of gasification reaction by the way of this jet flow；On the other hand, from winged
The flying dust for returning time thorax in the circulatory system also sprays into airflow bed gasification furnace, flying dust and gasifying agent with gasifying agent from gasification burner tip together
Come into full contact with so that flying dust is more easier to burn, solve the problems, such as to catch fire during flying dust returns thorax difficult, further increase
The efficiency of carbon con version of coal；
(2) a kind of manifold type gasification system of the utility model, comprehensively considers existing fluidized bed and entrained flow gasification skill
Respective Pros and Cons, the utility model couple fluidized-bed gasification furnace and airflow bed gasification furnace in art, eliminate gas
Fine coal preparation unit in fluidized bed gasification technology reduces equipment investment, while sharing one by coupling, fluidized bed and air flow bed
Residual neat recovering system, dust pelletizing system etc. are covered, occupied area is reduced, reduces equipment manufacturing cost, reduces cost of investment, and pass through
Gasification system after coupling is applicable to a plurality of types of solid fuels, and it is wide to be applicable in coal range；
(3) a kind of manifold type gasification system of the utility model is coupled in fluidized-bed gasification furnace and airflow bed gasification furnace
Cyclone mixer is introduced simultaneously in the process to revolve the complete coal particle of coal gas and unreacted that fluidized-bed gasification furnace generates to be vortexed
The mode hit sprays into airflow bed gasification furnace, compared to the original mode flowed naturally, what the vortex rotation that the utility model uses was hit
Input mode easily facilitates and is sufficiently mixed with the gasifying agent sprayed at gasification burner tip, also extends the furnace outage time of particle,
So that reaction is more thorough, the conversion ratio of coal is further improved；Particle is easier to reach under the influence of centrifugal force simultaneously
Airflow bed gasification furnace inner wall is conducive to dross in furnace, protects burner hearth；
(4) a kind of manifold type gasification system of the utility model, further includes gasifying agent supply equipment, and gasifying agent supply is set
It is standby to provide air, oxygen or oxygen-enriched for gasification reaction, after these gasifying agents are by preheater preheating, fluidized gasification is participated in respectively
The gasification reaction of furnace and airflow bed gasification furnace, middle fluidized-bed gasification furnace uses one that airflow bed gasification furnace produces compared to the prior art
The flue gas of temperature, pressure is determined as First air and gasifying agent, the utility model provides sufficient gasifying agent for fluidized-bed gasification furnace,
So that gasification reaction is more complete, the efficiency of carbon con version of coal is further increased；
(5) three, and gasification burner tip edge is at least arranged in a kind of manifold type gasification system of the utility model, gasification burner tip
The setting of airflow bed gasification furnace gas entry external circumferential, on the one hand ensure that gasifying agent or flying dust can be uniformly dispersed in furnace
It is interior, it is heated evenly, reacts more complete, on the other hand, each gasification burner tip being circumferentially arranged can be accepted preferably from whirlwind
The coal gas to get off and coal particles are hit in mixer rotation, extend the furnace outage time of particle, while gasifying agent and coal particles also have
Sufficient mixing, improves the efficiency of gasification reaction；
(6) a kind of manifold type gasification system of the utility model plays wherein being provided with nozzle cover outside gasification burner tip
The effect for protecting gasification burner tip at high temperature, extends the service life of gasification burner tip；
(7) a kind of manifold type gasification system of the utility model, is wherein provided with the first water cooling in airflow bed gasification furnace
Wall protects burner hearth at high temperature, extends service life of equipment, while the radiation loss of sufficiently recycling burner hearth, byproduct steam；First
It is laid with refractory material in water-cooling wall, the first water-cooling wall is allowed to be insulated, the caloric receptivity of capped water screen tube is reduced, so that burner hearth temperature
The problem of degree is significant to be increased, and avoids airflow bed gasification furnace in igniting or underload, flame instability, is easy stove chamber fire-extinguishing, together
When flame retardant coating can also reduce the abrasion of the first water-cooling wall；
(8) a kind of manifold type gasification system of the utility model is provided at least two layers of second water in waste heat boiler
Cold wall forms coal gas baffling channel between two layers of second water-cooling walls, and coal gas baffling channel is connected with the gas exit of waste heat boiler
It is logical, cooling processing can be carried out to institute's producing coal gas by multilayer water-cooling wall, airflow bed gasification furnace institute producing coal gas and slag are by waste heat boiler
Producer gas import enters, and first downlink flowing, slag falls into slag bath under self gravitation effect, after arranged by waste heat boiler slag-drip opening
Out, then baffling uplink extends gas cooling path by the coal gas baffling channel formed between multilayer water-cooling wall to coal gas, improves
Its heat transfer efficiency also reduces the body height of waste heat boiler.
Detailed description of the invention
Fig. 1 is the system structure diagram of the utility model.
In figure: 1, run coal bin；2, small coal scuttle；3, feeder；4, fluidized-bed gasification furnace；5, cyclone mixer；6, air flow bed
Gasification furnace；7, waste heat boiler；8, preheater；9, drum；10, waste-heat recoverer；11, bag filter；12, ash bucket；13, storehouse
Pump；14, mucking machine；15, dragveyer；16, defeated slag crust band；17, gasification burner tip.
Specific embodiment
The utility model is further described below in the following with reference to the drawings and specific embodiments.
Embodiment 1
As shown in Figure 1, a kind of manifold type gasification system, including be sequentially connected gasification system, residual neat recovering system, remove
Dirt system and the flying dust circulatory system, gasification system include fluidized-bed gasification furnace 4 and airflow bed gasification furnace 6, and airflow bed gasification furnace 6 connects
It connects in 4 downstream of fluidized-bed gasification furnace.
Residual neat recovering system includes waste heat boiler 7, preheater 8, drum 9 and waste-heat recoverer 10, airflow bed gasification furnace 6,
Waste heat boiler 7, preheater 8 and waste-heat recoverer 10 are sequentially connected, specifically, it is provided with gas inlet above waste heat boiler 7, with
The gas exit of airflow bed gasification furnace 6 is connected, for receiving gasification system coal gas generated and slag, on waste heat boiler 7
Portion is provided with gas exit and is connected with preheater 8.
Fresh wetting system is connected on drum 9, for recycling the supply of fresh water in system, important is respectively air-flows
Bed gasification furnace 6, waste heat boiler 7 and waste-heat recoverer 10 provide cooling water, drum 9 respectively with airflow bed gasification furnace 6, waste heat boiler
7 and waste-heat recoverer 10 be bi-directionally connected, the connection of two-phase herein, in particular to, be provided on drum 9 outlet of first cold medium and
First steam entry, the outlet of the first cold medium are connected with the water inlet on airflow bed gasification furnace 6, and the first steam entry is gentle
The heat of water outlet connection on fluidized gas producer 6, cooling water and airflow bed gasification furnace 6 exchanges heat；Is provided on drum 9
The outlet of two cold mediums and the second steam entry, the outlet of the second cold medium are connected with the water inlet of waste heat boiler 7, waste heat boiler 7
Water outlet connected with the second steam entry of drum 9 so that the heating gas in cooling water and waste heat boiler 7 exchanges heat；
The outlet of third cold medium and third steam entry, the outlet of third cold medium and third steam entry are additionally provided on drum 9
It is connected respectively with waste-heat recoverer 10, so that heating gas and cooling water further exchange heat, generates steam, and drum 9 is also by pre-
Hot device 8 is connected with fluidized-bed gasification furnace 4, airflow bed gasification furnace 6, so that the steaming generated by above-mentioned three kinds cooling water heat exchange circuits
Vapour by drum 9 buffering after, a part as gasifying agent continue through preheater 8 preheat after be transported to fluidized-bed gasification furnace 4,
Airflow bed gasification furnace 6 carries out gasification reaction, and a part is sent to steam pipe network after collecting and used for downstream steam user, uses simultaneously
This industrial equipment of drum 9, realizes the steam/water circulating of entire gasification system, can reduce the supply of fresh recirculated water in system.
It should be noted that the hot and cold medium to exchange heat in preheater 8 is the steam exported from drum 9 respectively, carrys out autopneumatolysis
The oxygen of agent supply equipment or heating gas oxygen-enriched and from the output of waste heat boiler 7, by the heat of heating gas in preheater 8
Gasifying agent is preheated, energy needed for gasification reaction, save the cost in gasification furnace can be reduced, and gasifying agent is preheated
After be passed through in gasification furnace, this high temperature combustion supporting technology effectively improves the cold gas efficiency of whole system, improves the thermal efficiency.
By above-mentioned multiloop heat exchange mode, heating gas temperature is reduced step by step, has simultaneously effective recycled heating gas
In heat, byproduct steam carries out the recycling and utilization of energy to greatest extent, and the thermal efficiency significantly improves.
Improvement has also been made to existing gasification system in the present embodiment, sets between fluidized-bed gasification furnace 4 and airflow bed gasification furnace 6
It is equipped with cyclone mixer 5, cyclone mixer 5 is connected with 4 output end of fluidized-bed gasification furnace, 6 input terminal of airflow bed gasification furnace respectively,
Specifically, 5 top of cyclone mixer and 4 output end of fluidized-bed gasification furnace, the i.e. gas exit of upper end are connected, cyclone mixer 5
6 input terminal of lower section and airflow bed gasification furnace, i.e. gas inlet are connected, and cyclone mixer 5 is by gasification reaction in fluidized-bed gasification furnace 4
The complete coal particle of coal gas and unreacted of generation is sprayed into airflow bed gasification furnace 6 with being vortexed the form that rotation is hit, and air flow bed gas
Change 6 upper end of furnace and be provided with gasification burner tip 17, for receiving gasifying agent, cyclone mixer 5 will be at 6 gas entry of airflow bed gasification furnace
The complete coal particle of the coal gas and unreacted come in, which sprays into, carries out gasification reaction in furnace, the gasifying agent introduced with gasification burner tip 17 fills
Divide mixing, improves reaction efficiency, and this vortex of cyclone mixer 5 revolves the input mode hit, and can also extend particle
Furnace outage time further improves the conversion ratio of coal so that reaction is more thorough, while particle is under the influence of centrifugal force more
It is accessible to 6 inner wall of airflow bed gasification furnace, is conducive to dross in furnace, protects burner hearth.
It is worth noting that, gasification burner tip 17 is also connected with the flying dust circulatory system, gasification burner tip 17 is logical with flying dust at this time
Road and gasifying agent channel, gasification burner tip 17 spray into flying dust and gasifying agent together in airflow bed gasification furnace 6, flying dust and gasifying agent
Come into full contact with so that flying dust is more easier to burn, solve the problems, such as to catch fire during flying dust returns thorax difficult, further increase
Coal conversion.
A kind of manifold type gasification system of the present embodiment, gasification process, specifically includes the following steps:
A, gasify workshop section: raw coal, which is crushed to after 10mm, to be transported to fluidized-bed gasification furnace 4 and gasifies, the coal gas of generation and not
The coal particle of fully reacting is sprayed into a manner of being vortexed rotation and hitting through cyclone mixer 5 and carries out second gasification in airflow bed gasification furnace 6
Reaction, wherein gasifying agent needed for reacting is provided by gasifying agent supply equipment and heat exchange workshop section, gasifying agent supply equipment is gasified reverse
The gasifying agent that should be provided mainly includes air, oxygen or oxygen-enriched, and heat exchange workshop section master gasifying agent to be offered is vapor, is needed
It is to be noted that oxygen-enriched concentration is 60% in the gasifying agent of the present embodiment；And gasifying agent is burnt from the gasification on airflow bed gasification furnace 6
Mouth 17 enters, to realize being sufficiently mixed for gasifying agent and coal particles, the efficiency of the gasification reaction of raising is obviously improved carbon
Conversion ratio；
B, exchange heat workshop section: the heating gas generated through gasification workshop section successively passes through waste heat boiler 7, preheater 8 and waste heat and recycles
Device 10 exchanges heat, and wherein drum 9 provides cold medium for airflow bed gasification furnace 6, waste heat boiler 7 and waste-heat recoverer 10, so that
The coal gas of heat successively exchanges heat, and temperature gradually decreases, and after changing thermogenetic some vapor by the buffering of drum 9, makees into preheater 8
Continue further to exchange heat with the heating gas in preheater 8 for cold medium, the steam after preheating is used to participate in gasifying as gasifying agent
Reaction, the thermal efficiency significantly improve, and the gasifying agent by preheating participates in the heat load that gasification reaction greatly reduces gasification furnace,
Save the cost；
C, dedusting workshop section: the coal gas after the heat exchange of waste-heat recoverer 10 is separated through dust pelletizing system, and the coal gas after dedusting enters
Next workshop section advanced optimizes purification；
D, flying dust recycles: through dust pelletizing system flying dust obtained after separation, through the flying dust circulatory system from 17 loopback of gasification burner tip
Gasify again to airflow bed gasification furnace 6, flying dust and gasifying agent pass through gasification burner tip 17 together and spray into airflow bed gasification furnace 6, make
It obtains the two more fully to mix and be evenly dispersed in furnace, thermally equivalent improves the efficiency of gasification reaction, significantly improves
Efficiency of carbon con version.
Embodiment 2
A kind of manifold type gasification system of the present embodiment, structure is substantially the same manner as Example 1, further, this
There are three the settings of gasification burner tip 17 of embodiment, and three gasification burner tips 17 are along 6 gas entry external circumferential of airflow bed gasification furnace
Setting so that gasifying agent may be uniformly dispersed in gasification furnace, allows gasifying agent and coal on the one hand when being passed through gasifying agent
Particle is sufficiently mixed, and circumferential setting can also be accepted preferably from the rotation of cyclone mixer 5 and hit the coal gas to get off and coal particles, is prolonged
The furnace outage time for having grown particle improves the efficiency of gasification reaction；On the other hand, during flying dust returns thorax and recycles,
Gasifying agent and flying dust are uniformly dispersed in furnace, are heated evenly, kindling is more easier, and reacts more complete.Gasification
The number of burner 17 can be four, five or six or more, and the circumferential setting of all gasification burner tips 17 is in air-flow
On the outside of 6 gas entry of bed gasification furnace, then do not describe one by one herein.
Simultaneously as the high-temperature work environment of gasification burner tip 17, the present embodiment is provided with nozzle cover outside gasification burner tip 17,
Play the role of protecting gasification burner tip 17 under high temperature, extends the service life of gasification burner tip 17.
Embodiment 3
As shown in Figure 1, a kind of manifold type gasification system, including be sequentially connected gasification system, residual neat recovering system, remove
Dirt system and the flying dust circulatory system, gasification system include fluidized-bed gasification furnace 4 and airflow bed gasification furnace 6, and airflow bed gasification furnace 6 connects
It connects in 4 downstream of fluidized-bed gasification furnace.Residual neat recovering system includes waste heat boiler 7, preheater 8, drum 9 and waste-heat recoverer 10,
Airflow bed gasification furnace 6, waste heat boiler 7, preheater 8 and waste-heat recoverer 10 are sequentially connected, drum 9 respectively with airflow bed gasification furnace
6, waste heat boiler 7 and waste-heat recoverer 10 are bi-directionally connected, and drum 9 also passes through preheater 8 and fluidized-bed gasification furnace 4, air flow bed gas
Change furnace 6 to be connected；Cyclone mixer 5 is provided between fluidized-bed gasification furnace 4 and airflow bed gasification furnace 6, cyclone mixer 5 is distinguished
It is connected with 4 output end of fluidized-bed gasification furnace, 6 input terminal of airflow bed gasification furnace；6 upper end of airflow bed gasification furnace is provided with gasification burner tip
17, the flying dust circulatory system is connected with gasification burner tip 17.
Wherein, the first water-cooling wall is provided in airflow bed gasification furnace 6, the first water-cooling wall is by the identical water-cooling wall of multiple shapes
Pipe and fin are welded, and the pipe shaft of water screen tube is set side by side along the vertical direction, the water inlet and water outlet of water screen tube
Positioned at the lower part and top of airflow bed gasification furnace 6, the water inlet of water screen tube and the first cold medium of drum 9 export connection, water
The water outlet of cold wall pipe is connected with the first steam entry of drum 9, and the first water-cooling wall can protect burner hearth at high temperature, extends
Service life of equipment, while the radiation loss of sufficiently recycling burner hearth, byproduct steam；It is laid with refractory material in first water-cooling wall,
Refractory material can use SiC material, and the first water-cooling wall is allowed to be insulated, and the caloric receptivity of capped water screen tube be reduced, so that burner hearth
The problem of temperature significantly increases, and avoids airflow bed gasification furnace in igniting or underload, and flame instability is easy stove chamber fire-extinguishing, together
When flame retardant coating can also reduce the abrasion of the first water-cooling wall.
Waste heat boiler 7 is provided with two layers of second water-cooling walls, forms coal gas baffling channel between two layers of water-cooling wall；Coal gas baffling
Channel is connected with 7 top gas exit of waste heat boiler；The top and bottom of second water-cooling wall are respectively arranged with water outlet and enter
The water inlet at the mouth of a river, the second water-cooling wall is connected with the outlet of the second cold medium of drum 9, the water outlet and drum 9 of the second water-cooling wall
The second steam entry connection；6 producing coal gas of airflow bed gasification furnace and slag are entered by 7 gas inlet of waste heat boiler, first under
For row by slag bath, slag falls into slag bath under self gravitation effect, after be discharged by slag-drip opening, then baffling uplink passes through coal gas to coal gas
Baffling channel extends gas cooling path, improves its heat transfer efficiency, while also reducing the body height of waste heat boiler 7.It is useless
7 lower part of heat boiler is additionally provided with liquid seal device, since the effect of pressure can prevent coal gas from being overflowed by slag-drip opening.
It is provided with the first heat-exchanging tube bundle in preheater 8, is connected respectively with the gas inlet of preheater 8 and gas exit；
Between 8 inner wall of first heat-exchanging tube bundle and preheater formed cold medium channel, be connected respectively with cold medium import and export, cold medium into,
Outlet is separately positioned on 8 upper side of 8 side-lower of preheater and preheater；The coal gas exported from waste heat boiler 7 is by 8 top of preheater
Gas inlet enters the cold medium with the cold medium import entrance by side-lower is arranged in, i.e. gasifying agent carries out counterflow heat exchange, cold
Media outlet is connected with 4 gasification agent inlet of fluidized-bed gasification furnace and 6 gasification burner tip 17 of airflow bed gasification furnace, further cooling
While coal gas, preheating is realized to gasifying agent, improves the utilization rate of waste heat of system.
The coal gas exported from preheater 8 enters waste-heat recoverer 10, further exchanges heat with cooling water.Whole system connects
It is bordering on counterflow heat exchange, carries out the recycling and utilization of energy to greatest extent, the thermal efficiency significantly improves.
A kind of manifold type gasification system of the present embodiment, gasification process specifically includes the following steps:
A, gasify workshop section: raw coal, which is crushed to after 8mm, to be transported to fluidized-bed gasification furnace 4 and gasifies, burner hearth interior reaction temperature
It is 950~1050 DEG C, the complete coal particle of coal gas and unreacted of generation is sprayed in a manner of being vortexed rotation and hitting through cyclone mixer 5
Enter and carry out second gasification reaction in airflow bed gasification furnace 6, burner hearth interior reaction temperature is about 1500 DEG C, wherein gasifying agent needed for reacting
It is provided by gasifying agent supply equipment and heat exchange workshop section, wherein gasifying agent supply equipment is that the gasifying agent that gasification reaction provides is main
Including air, oxygen or oxygen-enriched, heat exchange workshop section master gasifying agent to be offered is vapor, it should be noted that the present embodiment
In gasifying agent, oxygen-enriched concentration is 80%；And gasifying agent enters from the gasification burner tip 17 on airflow bed gasification furnace 6, to realize
Gasifying agent and coal particles are sufficiently mixed, and the efficiency of the gasification reaction of raising is obviously improved efficiency of carbon con version；
B, exchange heat workshop section: the heating gas generated through gasification workshop section successively passes through waste heat boiler 7, preheater 8 and waste heat and recycles
Device 10 exchanges heat, and wherein drum 9 is that airflow bed gasification furnace 6, waste heat boiler 7 and waste-heat recoverer 10 provide cold medium, from useless
The gas temperature that heat boiler 7 comes out is 900 DEG C or so, and after the heat exchange of preheater 8, gas temperature is 450 DEG C or so, gasifying agent
Preheating temperature is to 750 DEG C or so, and 450 DEG C or so of coal gas enters after waste-heat recoverer 10 exchanged heat, and gas temperature is reduced to
180 DEG C, temperature gradually decreases, change thermogenetic some vapor by drum 9 buffer after, into preheater 8 as cold medium after
Heating gas in continuous and preheater 8 further exchanges heat, and the steam after preheating is used to participate in gasification reaction, the thermal efficiency as gasifying agent
It significantly improves, and the gasifying agent by preheating participates in the heat load that gasification reaction greatly reduces gasification furnace, save the cost；
C, dedusting workshop section: the coal gas after the heat exchange of waste-heat recoverer 10 is separated through dust pelletizing system, and the coal gas after dedusting enters
Next workshop section advanced optimizes purification；
D, flying dust recycles: through dust pelletizing system flying dust obtained after separation, through the flying dust circulatory system from 17 loopback of gasification burner tip
Gasify again to airflow bed gasification furnace 6, flying dust and gasifying agent pass through gasification burner tip 17 together and spray into airflow bed gasification furnace 6, make
It obtains the two more fully to mix and be evenly dispersed in furnace, thermally equivalent improves the efficiency of gasification reaction, significantly improves
Efficiency of carbon con version.
Embodiment 4
A kind of manifold type gasification system of the present embodiment, structure and embodiment 3 are essentially identical, the difference is that this
The gasification system of embodiment further includes gasifying agent supply equipment, and gasifying agent supply equipment is burnt with gasification respectively by preheater 8
Mouth 17, fluidized-bed gasification furnace 4 are connected.Gasifying agent supply equipment provides air, oxygen or oxygen-enriched, these gasifying agents for gasification reaction
After preheating by preheater 8, the gasification reaction of fluidized-bed gasification furnace 4 and airflow bed gasification furnace 6 is participated in respectively, compared to existing skill
The flue gas for the certain temperature and pressure that fluidized-bed gasification furnace 4 is produced using airflow bed gasification furnace 6 in art is as First air and gasifying agent, originally
Embodiment provides sufficient gasifying agent for fluidized-bed gasification furnace 4 and further increases the carbon of coal so that gasification reaction is more complete
Conversion ratio.
A kind of manifold type gasification system of the present embodiment, gasification process specifically includes the following steps:
A, gasify workshop section: raw coal, which is crushed to after 6mm, to be transported to fluidized-bed gasification furnace 4 and gasifies, the coal gas of generation and not
The coal particle of fully reacting is sprayed into a manner of being vortexed rotation and hitting through cyclone mixer 5 and carries out second gasification in airflow bed gasification furnace 6
Reaction, wherein gasifying agent needed for reacting is provided by gasifying agent supply equipment and heat exchange workshop section, gasifying agent supply equipment is gasified reverse
The gasifying agent that should be provided mainly includes air, oxygen or oxygen-enriched, and heat exchange workshop section master gasifying agent to be offered is vapor, is needed
It is to be noted that oxygen-enriched concentration is 99.6% in the gasifying agent of the present embodiment；And gasifying agent is from the gasification on airflow bed gasification furnace 6
Burner 17 enters, to realize being sufficiently mixed for gasifying agent and coal particles, the efficiency of the gasification reaction of raising is obviously improved
Efficiency of carbon con version；
B, exchange heat workshop section: the coal gas and slag that the reaction of airflow bed gasification furnace 6 generates by the top of waste heat boiler 7 coal gas into
Mouth, which enters in waste heat boiler 7, carries out cooling and heat recovery, and by slag bath, slag is made in self gravity for coal gas and slag elder generation downlink
Fall into slag bath Quench under and be broken into little particle, after be discharged by lower part slag-drip opening；Coal gas, which then passes through on slag bath baffling, is advanced into two
Baffling channel between the second water-cooling wall of layer arranged after heat exchange cools down by top gas exit with from the cooling water of drum 9
Out, the aqueous medium in the second water-cooling wall through exchanging heat, which is converted into water vapour and is flowed out by the second water-cooling wall top water outlet, enters drum
9；Coal gas after the cooling of waste heat boiler 7 enters in preheater 8 and the oxygen from gasifying agent supply equipment or oxygen-enriched and next
The gasifying agent mixed from the vapor of drum 9 exchanges heat, and coal gas walks tube side, and gasifying agent walks shell side, obtains through counterflow heat exchange coal gas
The pre-heat treatment is carried out to gasifying agent while to cool down；Coal gas after heat exchange enters waste-heat recoverer 10 and carries out waste heat recycling
And byproduct steam enters in drum 9；
C, dedusting workshop section: the coal gas after the heat exchange of waste-heat recoverer 10 is separated through dust pelletizing system, the coal gas after dust removal process
Pressurized delivered is to user after being sent into desulphurization system after further cooling down；
D, flying dust recycles: through dust pelletizing system flying dust obtained after separation, through the flying dust circulatory system from 17 loopback of gasification burner tip
Gasify again to airflow bed gasification furnace 6, flying dust and gasifying agent pass through gasification burner tip 17 together and spray into airflow bed gasification furnace 6, make
It obtains the two more fully to mix and be evenly dispersed in furnace, thermally equivalent improves the efficiency of gasification reaction, significantly improves
Efficiency of carbon con version.
Embodiment 5
A kind of manifold type gasification system of the present embodiment, structure is substantially the same manner as Example 1, further, this
The gasification system of embodiment further includes coal supply system and slag-tapping system, in which:
Coal supply system includes sequentially connected run coal bin 1, small coal scuttle 2 and feeder 3, feeder 3 and fluidized-bed gasification furnace 4
Coal feeding hole is connected.
Dust pelletizing system includes bag filter 11；The flying dust circulatory system include ash bucket 12 and storehouse pump 13, waste-heat recoverer 10,
Bag filter 11, ash bucket 12, storehouse pump 13 are sequentially connected, and storehouse pump 13 is connected with the gasification burner tip 17 of airflow bed gasification furnace 6.
Slag-tapping system includes mucking machine 14, dragveyer 15 and defeated slag crust band 16, and mucking machine 14 and dragveyer 15 are respectively set
Below fluidized-bed gasification furnace 4 and airflow bed gasification furnace 6, defeated slag crust band 16 is located at 15 lower section of mucking machine 14 and dragveyer.
Fluidized-bed gasification furnace 4 is provided with coal feeding hole, gasification agent inlet, slag notch and gas exit, coal feeding hole with give coal
Machine 3 is connected, and gasification agent inlet is located at 4 lower section of fluidized-bed gasification furnace, is connected with preheater 8；Slag notch is located at fluidized bed gas
Change 4 lower section of furnace, is connected with mucking machine 14；Gas exit is located at 4 top of fluidized-bed gasification furnace, is connected with cyclone mixer 5.
Airflow bed gasification furnace 6 is provided with gas inlet and gas exit；Gas inlet is located on airflow bed gasification furnace 6
Side, is connected with cyclone mixer 5, the coal gas and the complete coal of unreacted generated for receiving the reaction of fluidized-bed gasification furnace 4
Grain；Gas exit is located at 6 lower section of airflow bed gasification furnace, is connected with waste heat boiler 7；
Waste heat boiler 7 specifically uses radiation waste-heat boiler, is provided with gas inlet, gas exit, slag on waste heat boiler 7
Pond, liquid seal device and slag-drip opening；Gas inlet is connected with 6 gas exit of airflow bed gasification furnace, for receiving gasification system
Coal gas generated；Gas exit is located at 7 upper lateral part of waste heat boiler, is connected with preheater 8；Slag bath, liquid seal device and row
Cinder notch is from top to bottom successively set on the lower part of waste heat boiler 7, and slag-drip opening is connected with slag-tapping system；Waste heat boiler 7 is provided with
Three layer of second water-cooling wall forms coal gas baffling channel between every two layers of second water-cooling walls；Coal gas baffling channel and gas exit phase
Connection, the second water-cooling wall upper end are provided with water outlet, and the second water-cooling wall lower end is provided with water inlet, is connected respectively with drum 9.
Preheater 8 is provided with gas inlet, gas exit, cold medium import and cold medium outlet；Gas inlet is located at
8 top of preheater, is connected with 7 gas exit of waste heat boiler；Gas exit is located at 8 lower section of preheater, with waste-heat recoverer 10
It is connected；Cold medium import is located at 8 side-lower of preheater, is connected with drum 9 and oxygen supply equipment；Cold medium exports position
In 8 upper side of preheater, it is connected with 4 gasification agent inlet of fluidized-bed gasification furnace and 6 gasification burner tip 17 of airflow bed gasification furnace.Value
It obtains one and is mentioned that being provided with the first heat-exchanging tube bundle in preheater 8, being connected respectively with gas inlet and gas exit, first changes
Cold medium channel is formed between 8 inner wall of heat pipe bundle and preheater, is connected respectively with cold medium import and export, in heat transfer process, coal gas
Walk tube side, gasifying agent walks shell side, i.e., coal gas by top gas inlet enter with by side-lower cold medium import entrance is arranged in
Cold medium, i.e. gasifying agent, which carry out counterflow heat exchange, realizes preheating to gasifying agent further while cooling coal gas, improves and is
The utilization rate of waste heat of system.
Sustainable water supply while drum 9 carries out steam separation to water vapour, the steam after final exportable steam-water separation,
For a part as gasifying agent needed for gasification reaction, a part can be outside for being used for downstream steam user.
A kind of manifold type gasification system of the present embodiment, gasification process the following steps are included:
A, gasification workshop section: Belt Conveying is to run coal bin 1 after raw coal is crushed to 5mm, through small coal scuttle 2 and feeder 3 by giving coal
Mouth, which is sent into fluidized-bed gasification furnace 4, carries out gasification reaction, reacts solid slag generated by the deslagging of 4 lower section of fluidized-bed gasification furnace
Mouth discharge, is sent to cinder field through mucking machine 14, defeated slag crust band 16；The complete coal particle of coal gas and unreacted of generation is mixed through whirlwind
Device 5 sprays into progress second gasification reaction in airflow bed gasification furnace 6 in a manner of being vortexed rotation and hit, wherein gasifying agent needed for reacting is by gas
Agent supply equipment and heat exchange workshop section provide, and use after the preheating of preheater 8, and gasifying agent supply equipment is gasification reaction
The gasifying agent of offer mainly includes air, oxygen or oxygen-enriched, and heat exchange workshop section master gasifying agent to be offered is vapor, needs to infuse
Meaning is in the gasifying agent of the present embodiment, and oxygen-enriched concentration is 90%；And gasifying agent is from the gasification burner tip on airflow bed gasification furnace 6
17 enter, to realize being sufficiently mixed for gasifying agent and coal particles, the efficiency of the gasification reaction of raising is obviously improved carbon and turns
Rate；
B, exchange heat workshop section: the coal gas and slag that the reaction of airflow bed gasification furnace 6 generates by the top of waste heat boiler 7 coal gas into
Mouth, which enters in waste heat boiler 7, carries out cooling and heat recovery, and by slag bath, slag is made in self gravity for coal gas and slag elder generation downlink
Fall into slag bath Quench under and be broken into little particle, after be discharged by lower part slag-drip opening, slag is sent to by dragveyer 15 and defeated slag crust band 16
?；Coal gas then passes through the baffling channel being advanced between the second water-cooling wall on slag bath baffling to carry out with from the cooling water of drum 9
It is discharged after heat exchange is cooling by top gas exit, the aqueous medium in the second water-cooling wall through exchanging heat is converted into water vapour by the second water
Water outlet outflow in cold wall top enters drum 9, the liquid seal device of 7 lower part of waste heat boiler due to the effect of pressure can prevent coal gas by
Slag-drip opening overflows；Coal gas after the cooling of waste heat boiler 7 enters in preheater 8 and oxygen or richness from gasifying agent supply equipment
Oxygen and the gasifying agent of the vapor mixing from drum 9 exchange heat, and coal gas walks tube side, and gasifying agent walks shell side, is countercurrently changed
The pre-heat treatment is carried out to gasifying agent while heating gas is cooled down；Coal gas after heat exchange enters the progress of waste-heat recoverer 10
Simultaneously byproduct steam enters in drum 9 for waste heat recycling；
C, dedusting workshop section: the coal gas after the heat exchange of waste-heat recoverer 10 is separated through bag filter 11, the coal gas after dedusting
Into next workshop section, pressurized delivered is to user after further cooling optimization purifies；
D, flying dust recycles: through dust pelletizing system flying dust obtained after separation, into ash bucket 12, due to wherein still containing centainly
The complete carbon of unreacted, and its partial size meets air flow bed as-fired coal Particle size requirements, can it is recycled to and be gasified by storehouse pump 13
Agent mixing, then by the gasification burner tip 17 of airflow bed gasification furnace 6 by revolve hit hit stream in the form of spray into secondary response again in furnace, revolve to hit and hit
The form of stream makes the two more fully mix and be evenly dispersed in furnace, and thermally equivalent improves the effect of gasification reaction
Rate, and flying dust recycles in closed loop, realizes a whole set of gasification system flying dust zero-emission, 6 deslagging material carbon residues of airflow bed gasification furnace
Rate reduces, and further improves efficiency of carbon con version.
Schematically the utility model and embodiments thereof are described above, description is not limiting, attached drawing
Shown in be also one of the embodiments of the present invention, actual structure is not limited to this.So if this field
Those of ordinary skill enlightened by it, without deviating from the purpose of the present invention, not inventively design
Frame mode similar with the technical solution and embodiment, all should belong to the protection range of the utility model.
Claims (7)
1. a kind of manifold type gasification system, including gasification system, residual neat recovering system, dust pelletizing system and the flying dust being sequentially connected
The circulatory system, the gasification system include fluidized-bed gasification furnace (4) and airflow bed gasification furnace (6), the entrained flow gasification
Furnace (6) is connected to described fluidized-bed gasification furnace (4) downstream, it is characterised in that:
The residual neat recovering system includes waste heat boiler (7), preheater (8), drum (9) and waste-heat recoverer (10), described
Airflow bed gasification furnace (6), waste heat boiler (7), preheater (8) and waste-heat recoverer (10) be sequentially connected, the drum (9)
It is bi-directionally connected respectively with the airflow bed gasification furnace (6), the waste heat boiler (7) and the waste-heat recoverer (10),
And the drum (9) is also connected by the preheater (8) with fluidized-bed gasification furnace (4), airflow bed gasification furnace (6)；
The gasification system further includes cyclone mixer (5), the cyclone mixer (5) respectively with the fluidized gasification
Furnace (4) output end, the airflow bed gasification furnace (6) input terminal are connected；Described airflow bed gasification furnace (6) upper end is provided with gas
Change burner (17), the flying dust circulatory system is connected with the gasification burner tip (17).
2. a kind of manifold type gasification system according to claim 1, it is characterised in that: further include that gasifying agent supply is set
It is standby, the gasifying agent supply equipment by the preheater (8) respectively with the gasification burner tip (17), the fluidisation
Bed gasification furnace (4) is connected.
3. a kind of manifold type gasification system according to claim 1 or 2, it is characterised in that: the gasification burner tip
(17) at least it is arranged three, and the gasification burner tip (17) is arranged along airflow bed gasification furnace (6) gas entry external circumferential.
4. a kind of manifold type gasification system according to claim 3, it is characterised in that: the gasification burner tip (17) is outside
It is provided with nozzle cover.
5. a kind of manifold type gasification system according to claim 1 or 2, it is characterised in that: the entrained flow gasification
The first water-cooling wall is provided in furnace (6).
6. a kind of manifold type gasification system according to claim 5, it is characterised in that: applied in first water-cooling wall
Equipped with refractory material.
7. a kind of manifold type gasification system according to claim 1 or 2, it is characterised in that: the waste heat boiler (7)
At least two layers of second water-cooling walls are inside provided with, form coal gas baffling channel, the coal between the second water-cooling wall described in two layers
Gas baffling channel is connected with the gas exit of the waste heat boiler (7).
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108753370A (en) * | 2018-08-22 | 2018-11-06 | 安徽科达洁能股份有限公司 | A kind of manifold type gasification system and method |
| CN110205166A (en) * | 2019-06-25 | 2019-09-06 | 河南信祥环境科技有限公司 | A kind of solid waste refuse gasification fusing system and method |
| CN110484301A (en) * | 2019-08-30 | 2019-11-22 | 哈尔滨工业大学 | A kind of grace classification gasification system of flying dust dry-type clean processing |
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2018
- 2018-08-22 CN CN201821354065.6U patent/CN208776672U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108753370A (en) * | 2018-08-22 | 2018-11-06 | 安徽科达洁能股份有限公司 | A kind of manifold type gasification system and method |
| CN108753370B (en) * | 2018-08-22 | 2024-03-29 | 安徽科达洁能股份有限公司 | Coupled coal gasification system and method |
| CN110205166A (en) * | 2019-06-25 | 2019-09-06 | 河南信祥环境科技有限公司 | A kind of solid waste refuse gasification fusing system and method |
| CN110484301A (en) * | 2019-08-30 | 2019-11-22 | 哈尔滨工业大学 | A kind of grace classification gasification system of flying dust dry-type clean processing |
| CN110484301B (en) * | 2019-08-30 | 2020-10-27 | 哈尔滨工业大学 | Ender grading gasification system for dry-type clean treatment of fly ash |
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