CN105838444B - A kind of fluidized gasification bottom slag cooling conveying system - Google Patents
A kind of fluidized gasification bottom slag cooling conveying system Download PDFInfo
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- CN105838444B CN105838444B CN201610258956.0A CN201610258956A CN105838444B CN 105838444 B CN105838444 B CN 105838444B CN 201610258956 A CN201610258956 A CN 201610258956A CN 105838444 B CN105838444 B CN 105838444B
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- slag
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- lock hopper
- water
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
-
- 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
- C10J3/54—Gasification of granular or pulverulent fuels by the Winkler technique, i.e. by fluidisation
- C10J3/56—Apparatus; Plants
-
- 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
Abstract
The present invention relates to the slag notches of a kind of fluidized gasification bottom slag cooling conveying system, including level-one water cooling lock hopper, level-one water cooling lock hopper to connect with the slag inlet of two-stage water-cooling lock hopper through the first high temperature cut-off valve；The slag notch of two-stage water-cooling lock hopper sets the first batcher, and the second high temperature cut-off valve, expansion bellow are set successively on the slag input channel that the first batcher connects with barrel slag cooler slag inlet；The first induced duct of negative pressure air port in two-stage water-cooling lock hopper connects bellows, the negative-pressure air duct that the slag input end of barrel slag cooler is connect with slag output end is connect through the second induced duct with bellows, bellows connect bag filter by taking out dirt pipe, and the ash discharging hole of bag filter sets the second batcher and is connected to conveyer by ash releasing tube.Structure of the invention is simple and practical, and reliability higher, cold slag, sealing effect are good, energy conservation and environmental protection, can solve current fluidized-bed gasification furnace dreg removing system there are the problem of.
Description
Technical field
The invention belongs to boiler bottom slag processing technology fields, and in particular to a kind of fluidized gasification bottom slag cooling delivery system
System.
Background technology
By semicentennial development, the production of energy system that China forms based on coal, provides multiple forms of energy to complement each other, coal disappears
Consumption accounts for 70% or so of total energy consumption, and traditional direct combustion method is mainly continued to use in the utilization of coal for a long time, is not only imitated
Rate is low, and gives off a large amount of flue dust, sulfur dioxide and nitrogen oxides.And natural gas is not only clean with respect to coal and utilization side
Just, the carbon dioxide that in addition gas utilization discharges is the half of coal utilization.As increasingly strict environmental Kuznets Curves discharge is complete
The limitation of ball, the yield of natural gas is far from meeting the needs of people, and therefore, the potentiality and competitiveness of Coal Gasification are shown
Come, quickly, technical advance and maturity are all unprecedented for modern Coal Gasification Technology development.
Gasification furnace is the abbreviation of gas generator, is the production equipment for converting coal to coal gas, according to gasification furnace type
Several forms such as fixed-bed gasification furnace, fluidized-bed gasification furnace, airflow bed gasification furnace can be divided into.Wherein, fluidized gasification technology is more
Add advanced, compared to other gasification technologies, its main advantage is the fuel flexibility of bigger, can gasify all types of
Coal and cinder product, including cheaper, the low-quality for being more easy to acquisition, high ash, hydrogenous coal and reproducible biomass
Deng, but for a long time, because of the characteristic of fluidized-bed gasification furnace, furnace pressure is high, and the grey quantity of slag generated after Coal Gasification is big, warm
Degree is high and is not easy to seal, therefore deslagging problem fails to be well solved always.
Existing fluidized-bed gasification furnace largely uses wet slag removal system, that is, uses submerged slag conveyor to carry out bottom ash cooling
And it is delivered to slag storehouse, in this course, lime-ash falls directly into the sink of submerged slag conveyor and is cooled down, and not only wastes big
The water resource of amount, while lime-ash heat is wasted, and is unable to get effective recycling, and the lime-ash after being in direct contact with water loses work
Property, it can not comprehensively utilize again；Separately there is sub-fraction fluidized-bed gasification furnace to use dry bottom ash handling system, is carried out using water cooling auger
Lime-ash is cooling and conveys, but since slag from gasifying furnace amount is larger and water cooling flood dragon heat exchange area is limited, structural stability is poor, changes
Heat output is small, therefore live service requirement is not achieved in its heat transfer effect, and using effect is also not fully up to expectations.Therefore, fluidized gasification
The lime-ash processing mode of stove is field technology personnel's urgent problem to be solved.
Invention content
A kind of fluidized gasification bottom slag cooling conveying is provided it is an object of the invention to solve above-mentioned technical problem
System.
To achieve the above object, the present invention adopts the following technical scheme that：
A kind of fluidized gasification bottom slag cooling conveying system, including level-one water cooling lock hopper, level-one water cooling lock hopper are slagged tap
Mouth connects through the first high temperature cut-off valve with the slag inlet of two-stage water-cooling lock hopper；The slag notch of two-stage water-cooling lock hopper sets the first batcher,
The second high temperature cut-off valve, expansion bellow are set successively on the slag input channel that first batcher connects with barrel slag cooler slag inlet；Two
Negative pressure air port the first induced duct in grade water cooling lock hopper connects bellows, and what the slag input end of barrel slag cooler was connect with slag output end bears
Pressure ventilation pipe is connect through the second induced duct with bellows, and bellows connect bag filter, the ash discharging hole of bag filter by taking out dirt pipe
If the second batcher is simultaneously connected to conveyer by ash releasing tube.
Level-one water cooling lock hopper, two-stage water-cooling lock hopper are jacket type can-like structure, chuck internal circulation cooling water, tank interior
Circulate lime-ash.
At least one intermediate water cooling lock hopper, intermediate water cooling lock hopper are additionally provided between level-one water cooling lock hopper and two-stage water-cooling lock hopper
On set negative pressure air port and be connected to bellows through an induced duct.
First high temperature cut-off valve is Pneumatic high temperature gate valve, and the second high temperature cut-off valve is electric high-temperature gate valve；First batcher is water
Cold lock gas batcher, the second batcher are electric lock pneumatic batcher.
The dust-exhausting port of bag filter connects downtake pipe, and downtake pipe connects air-introduced machine, air-introduced machine connection second
Exhaust pipe.
Conveyer is one kind of belt conveyor, drag conveyor, bucket chain conveyor.
Barrel slag cooler be jacket type barrel slag cooler, film-type wall-type barrel slag cooler, multitube barrel slag cooler one
Kind.
Present system features simple structure is practical, and reliability higher, cold slag, sealing effect are good, energy conservation and environmental protection, can solve well
Certainly current fluidized-bed gasification furnace dreg removing system there are the problem of, there is great practice to produce meaning.
Description of the drawings
Fig. 1 is the structural schematic diagram of fluidized gasification bottom slag cooling conveying system provided in an embodiment of the present invention：
In figure：1 be level-one water cooling lock hopper, 2 be the first high temperature cut-off valve, 3 be two-stage water-cooling lock hopper, 4 be the first batcher, 5
It is expansion bellow for the second high temperature cut-off valve, 6,7 be barrel slag cooler, and 8 be the first induced duct, and 9 be bellows, and 10 be the second air inducing
Pipe, 11 is take out dirt pipe, and 12 be bag filter, and 13 be downtake pipe, and 14 be air-introduced machine, and 15 be second exhaust pipe, and 16 be the
Two batchers, 17 be ash releasing tube, and 18 be negative-pressure air duct, and 19 be conveyer.
Specific implementation mode
In the following, the substantive distinguishing features and advantage of the present invention are further described in conjunction with example, but the present invention not office
It is limited to listed embodiment.
It is shown in Figure 1, a kind of fluidized gasification bottom slag cooling conveying system, including level-one water cooling lock hopper 1, slag inlet
The two-stage water-cooling lock hopper 3 that connects with the slag notch of level-one water cooling lock hopper 1 through the first high temperature cut-off valve 2, two-stage water-cooling lock hopper are slagged tap
Mouth sets the first batcher 4, sets the second high temperature successively on the slag input channel that the first batcher 4 connects with 7 slag inlet of barrel slag cooler
Gate valve 5, expansion bellow 6；The first induced duct of negative pressure air port 8 in two-stage water-cooling lock hopper connects bellows 9, barrel slag cooler
The negative-pressure air duct 18 that slag input end is connect with slag output end is connect through the second induced duct 10 with bellows 9, and bellows 9 are connected by taking out dirt pipe 11
The ash discharging hole of bag filter 12, bag filter sets the second batcher 16 and is connected to conveyer 19. by ash releasing tube 17
Wherein, level-one water cooling lock hopper, two-stage water-cooling lock hopper are jacket type can-like structure, chuck internal circulation cooling water, tank
Body internal circulation lime-ash.
Wherein, the first high temperature cut-off valve is Pneumatic high temperature gate valve, and the second high temperature cut-off valve is electric high-temperature gate valve；First batcher
Gas batcher is locked for water cooling, the second batcher is electric lock pneumatic batcher.
Wherein, the dust-exhausting port of bag filter connects downtake pipe, and downtake pipe connects air-introduced machine, air-introduced machine connection
Second exhaust pipe.
In the following, that the present invention is described in detail is as follows：
The top of level-one water cooling lock hopper is connected by Pneumatic high temperature gate valve with fluidized-bed gasification furnace burner hearth, main function
For the closing and precooling of lime-ash, lower part is connected with Pneumatic high temperature gate valve by flange and bolt and is switched to two-stage water-cooling lock
Bucket.
Because not allowing to be contacted in gasification furnace gasification with outside air, so to ensure the gasification of gasification furnace
Unaffected, when system works, the upper and lower two Pneumatic high temperature gate valves of level-one water cooling lock hopper cannot open simultaneously, two-stage water-cooling lock
Bucket, which plays the role of one, to be precooled to lime-ash, second is that sealing process can be played, two-stage water-cooling lock hopper lower part by flange and
Bolt and water cooling lock gas batcher and electric high-temperature gate valve is attached, electric high-temperature gate valve to shut down barrel slag cooler into
Slag.
Water cooling lock gas batcher itself has the function of water cooling, can high temperature resistant, may be implemented the even feeding of lime-ash, and
It is acted on to certain every pressure, so that the lime-ash pressure in two level lock hopper is not passed directly into barrel slag cooler, therefore lime-ash is cold
Slag machine will not coking or blocking, barrel slag cooler also not will produce leakage slag phenomenon.
Expansion bellow is arranged in electric high-temperature gate valve lower part, and to absorb the thermal expansion amount of two-stage water cooling lock hopper, ripple is swollen
Swollen section lower end is connect with barrel slag cooler；Barrel slag cooler is cooled down red-hot lime-ash by the form of indirect water-cooling, and
Lime-ash is conveyed from slag inlet to slag notch, lime-ash drains into the belt conveyor fortune being connected with barrel slag cooler after supercooling
Go out boiler room, a negative-pressure air duct is respectively equipped with into and out of slag end in barrel slag cooler, and connects with the second induced duct after converging into all the way
It connects, is provided with air port at one above two level lock hopper, and be connected with the second induced duct, the second induced duct and the second induced duct are connected to
Bellows top, bellows are made of stainless steel, can tolerate higher temperature, effect is to mix two-way dusty gas, and lead to
It crosses pumping dirt pipe and mixed dusty gas is led into bag filter from bellows lower part, because high-temperature gas density is small, and bellows are adopted
The arrangement form of lower part outlet air is entered the wind with top, therefore is adequately mixed inside it convenient for high-temperature dusty gas, and cloth bag removes
The effect of dirt device is filtering gas, so that dusty gas is purified, electric lock pneumatic batcher is connected to below the ash bucket of bag filter,
The discharge ash bucket such as dust that can uniformly collect bag filter, electric lock pneumatic batcher are connected with ash releasing tube, ash discharge
The ash of pipe discharge is connected to belt conveyor and transports boiler room.And pass sequentially through first exhaust through the filtered gas of bag filter
Pipe, air-introduced machine, second exhaust pipe etc. drain into air, and air-introduced machine provides the kinetic energy in entire gas flow.
When system works, level-one water cooling lock hopper, two-stage water-cooling lock hopper, water cooling and electric lock pneumatic batcher, barrel slag cooler
It is passed through cooling water, water source may be derived from boiler system condensed water, can be introduced from low-temperature level low-pressure heater, return to high-temperature level low pressure
Heater or oxygen-eliminating device.
When gasification furnace burner hearth deslagging, Pneumatic high temperature gate valve is opened above level-one water cooling lock hopper, and lower section Pneumatic high temperature gate valve
It closes, 900 DEG C of red-hot lime-ash enter level-one water cooling lock hopper and stored and precooled, can cool the temperature to 800 DEG C or so, wait for
When lime-ash is full of in level-one water cooling lock hopper, the Pneumatic high temperature gate valve of upper part is closed, and lower part Pneumatic high temperature gate valve is then opened, lime-ash
Two-stage water-cooling lock hopper is entered to from level-one water cooling lock hopper, and carries out second of precooling of lime-ash by two-stage water-cooling lock hopper simultaneously
But, 700 DEG C or so can be cooled the temperature to, the electric high-temperature gate valve being arranged below two-stage water-cooling lock hopper at this time is opened, and lime-ash passes through
Water cooling lock gas batcher equably feeds into barrel slag cooler, and lime-ash can be cooled to 80 DEG C hereinafter, and passing through by barrel slag cooler
Its slag-drip opening is expelled to belt conveyor, and so on works, and can realize the continuous discharging slag of gasification furnace.
Because the lime-ash in level-one water cooling lock hopper, two-stage water-cooling lock hopper has higher positive pressure, therefore it is in make lime-ash be unlikely to
Revealing spray regime causes lag cooler leakage slag phenomenon occur, and the present invention is provided with negative pressure air port above two-stage water-cooling lock hopper, the
The negative pressure air port is connected by two induced ducts with bellows top, and lock hopper internal pressure can be greatly reduced by negative pressure wind, to
The sealed pressure of barrel slag cooler is alleviated, while negative pressure wind also functions to certain cooling effect.
The slag input end of barrel slag cooler and slag output end are both provided with negative-pressure air duct and converge into all the way, to by cold slag machine drum body
Inside forms negative pressure state, to which lime-ash will not generate leakage slag phenomenon, slag input end negative pressure at the place of being association of activity and inertia of barrel slag cooler
Air temperature is higher, and slag output end negative pressure air temperature is relatively low.
Preferably, it is respectively provided with manually or electrically air door on two sections of negative-pressure air ducts, the negative pressure in every section of negative-pressure air duct is adjusted
Wind flow achievees the effect that the entire negative pressure air temperature of adjustment.
The tolerable temperature of bags in bag-type dust remover is 250 DEG C, but the dusty gas temperature excluded from two level lock hopper
About 300 DEG C, already exceed the tolerance of bag filter, and lime-ash be because that itself can be cooled to 80 DEG C by barrel slag cooler,
The negative pressure wind of slag input end and slag output end is all from ambient enviroment, thus barrel slag cooler both ends negative pressure wind converge after ash-laden gas
Temperature is about 100-120 DEG C, therefore the dusty gas that also leads in bellows top and two level lock hopper of dusty gas that ought be exists herein
After inner bellows mixing, dusty gas temperature can be down to 200 DEG C hereinafter, fully meet the service requirement of bag filter, to
The reliability of the system is set to be substantially improved, the service life substantially extends.
When the mixed gas in bellows is directed to bag filter from bellows lower part, particle is big, heavy dust, by
It settles down in the effect of gravity, falls into ash bucket, when passing through cloth bag, dust can also be hindered the gas containing relatively fine dust
It stays, gas is made to be purified, purified gas passes sequentially through downtake pipe, air-introduced machine, second exhaust pipe etc. and drains into air
In environment, the dust being filtered then drains into belt conveyor by the electric lock pneumatic batcher and ash releasing tube of ash bucket lower part,
Whole process will not cause environment any pollution.In lime-ash cooling procedure, the cooled water of heat of lime-ash fully absorbs, and
Heat recovery to boiler system can be reduced boiler coal consumption, energy conservation and environmental protection to improve the thermal efficiency of boiler.
It should be noted that in the present invention, the form of the barrel slag cooler can be a variety of, according to the output of system requirements
The forms such as jacket type, film-type wall-type, multitube can be used in difference；
In the present invention, the belt conveyor is only a kind of embodiment, can be also modified to bury scraper plate according to actual conditions defeated
Send machine, bucket chain conveyor or other conveying equipments.
In the present invention, the two-stage water cooling lock hopper is only a kind of preferred embodiment, can also be arranged according to on-site actual situations
Three-level, can be also connected with by the Pneumatic high temperature gate valve being connected such as between level-one water cooling lock hopper and two-stage water-cooling lock hopper to
A few intermediate water cooling lock hopper, water cooling lock hopper among level-one is connected with two-stage water-cooling lock hopper, forms three-level water cooling lock hopper,
Wherein, negative pressure air port is set in intermediate water cooling lock hopper and be connected to bellows through an induced duct, to realize multistage arrangement water cooling lock
Bucket carries out multistage cooling, to achieve the effect that preferably to cool down slag.
Compared with existing gasification furnace slag removing system, the present invention has the advantages that following prominent：
1, the present invention not only saves a large amount of water resource, while can fully absorb lime-ash heat, improves boiler thermal efficiency,
Reduce coal consumption；
2, lime-ash maintains the activity of lime-ash, is conducive to ash always with cooling water indirect heat exchange in the course of work of the present invention
The comprehensive utilization of slag；
3, present invention configuration water cooling locks gas batcher, therefore can not will produce lime-ash uniform discharge to barrel slag cooler
The accidents such as stifled slag, coking；
4, the present invention substitutes water cooling auger using barrel slag cooler, and heat exchange area increases, and cold slag, which is contributed, to be increased, and can be met existing
Field actual motion requirement；
5, pass through the collective effect of the components such as negative-pressure air duct, bellows, bag filter so that live airborne dust, drum slag cooling
Machine leakage slag phenomenon no longer occurs, and has reached the requirement carried out production strictly in line with rules and regulations；
6, by the way that bellows are added in whole system, the service life of bag filter is substantially extended, is improved entire
The reliability of dreg removing system；
7, by the filtration of bag filter, dusty gas can be filtered to the gas for reaching environmental protection standard, it will not
It pollutes the environment.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (7)
1. a kind of fluidized gasification bottom slag cooling conveying system, which is characterized in that locked including level-one water cooling lock hopper, level-one water cooling
The slag notch of bucket connects through the first high temperature cut-off valve with the slag inlet of two-stage water-cooling lock hopper；The slag notch of two-stage water-cooling lock hopper sets first
It is swollen to set the second high temperature cut-off valve, ripple on the slag input channel that the first batcher connects with barrel slag cooler slag inlet successively for batcher
Swollen section；The first induced duct of negative pressure air port in two-stage water-cooling lock hopper connects bellows, the slag input end of barrel slag cooler and slag output end
The negative-pressure air duct of connection is connect through the second induced duct with bellows, and bellows connect bag filter, bag filter by taking out dirt pipe
Ash discharging hole set the second batcher and conveyer be connected to by ash releasing tube.
2. fluidized gasification bottom slag cooling conveying system according to claim 1, which is characterized in that level-one water cooling lock hopper,
Two-stage water-cooling lock hopper is jacket type can-like structure, chuck internal circulation cooling water, tank interior circulation lime-ash.
3. fluidized gasification bottom slag cooling conveying system according to claim 1 or claim 2, which is characterized in that level-one water cooling is locked
It is additionally provided at least one intermediate water cooling lock hopper between bucket and two-stage water-cooling lock hopper, sets negative pressure air port in intermediate water cooling lock hopper and through one
A induced duct is connected to bellows.
4. fluidized gasification bottom slag cooling conveying system according to claim 1 or claim 2, which is characterized in that the first high temperature lock
Valve is Pneumatic high temperature gate valve, and the second high temperature cut-off valve is electric high-temperature gate valve；First batcher is that water cooling locks gas batcher, and second gives
Material machine is electric lock pneumatic batcher.
5. fluidized gasification bottom slag cooling conveying system according to claim 4, which is characterized in that the row of bag filter
Dirt mouth connects downtake pipe, and downtake pipe connects air-introduced machine, and air-introduced machine connects second exhaust pipe.
6. according to the fluidized gasification bottom slag cooling conveying system of claim 1 or 5, which is characterized in that conveyer is skin
One kind with conveyer, drag conveyor, bucket chain conveyor.
7. fluidized gasification bottom slag cooling conveying system according to claim 6, which is characterized in that barrel slag cooler is folder
One kind of shell type barrel slag cooler, film-type wall-type barrel slag cooler, multitube barrel slag cooler.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202369557U (en) * | 2011-12-22 | 2012-08-08 | 太原重工股份有限公司 | Deslagging device for ash agglomeration gasification furnace |
| CN205710608U (en) * | 2016-04-25 | 2016-11-23 | 青岛松灵电力环保设备有限公司 | A kind of fluidized gasification bottom slag cooling conveying system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3600329B2 (en) * | 1995-11-01 | 2004-12-15 | 三菱重工業株式会社 | Slag discharger |
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2016
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202369557U (en) * | 2011-12-22 | 2012-08-08 | 太原重工股份有限公司 | Deslagging device for ash agglomeration gasification furnace |
| CN205710608U (en) * | 2016-04-25 | 2016-11-23 | 青岛松灵电力环保设备有限公司 | A kind of fluidized gasification bottom slag cooling conveying system |
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