CN204151306U - A kind of coal pyrolytic gasified polygenerations systeme based on circulating fluidized bed - Google Patents
A kind of coal pyrolytic gasified polygenerations systeme based on circulating fluidized bed Download PDFInfo
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- CN204151306U CN204151306U CN201420558876.3U CN201420558876U CN204151306U CN 204151306 U CN204151306 U CN 204151306U CN 201420558876 U CN201420558876 U CN 201420558876U CN 204151306 U CN204151306 U CN 204151306U
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Abstract
The utility model provides a kind of coal pyrolytic gasified polygenerations systeme based on circulating fluidized bed, comprise: circular fluid bed, pyrolysis coal bunker, moving bed pyrolysis reactor, screening washer, semicoke divider, moving-bed gasification stove, cyclonic separator, active carbocoal sifter, this system is from the reactivity of coal, high volatile coal experiences pyrolysis successively, gasification and burning three processes, it is a kind of pyrolysis, gasification, the coal classified utilization system of burning combination, reasonably make use of excellent, bad coal resources, realize staged conversion and utilization, resources and environment problem can be solved better.
Description
Technical field
The utility model relates to pyrolysis of coal field, particularly relates to a kind of coal pyrolytic gasified polygenerations systeme based on circulating fluidized bed.
Background technology
Rich coal resources in China, within 2012, coal in China output reaches 3,600,000,000 tons, wherein about 80% for direct burning, and coal directly burns and there is the problems such as efficiency of combustion is low, seriously polluted, and the new technology therefore developing coal high-efficiency comprehensive utilization and low pollution emission is extremely urgent.
Summary of the invention
The utility model provides a kind of coal pyrolytic gasified polygenerations systeme based on circulating fluidized bed, is the coal classified utilization system of a kind of pyrolysis, gasification, burning combination, can realizes heat, electricity, tar, coal gas and activated coke combination producing.
For achieving the above object, the technical solution of the utility model is: a kind of coal pyrolytic gasified polygenerations systeme based on circulating fluidized bed, comprising:
Circular fluid bed, is connected with moving bed pyrolysis pipe reactor, for providing high-temp circulating ash to moving bed pyrolysis reactor;
Pyrolysis coal bunker, is connected with moving bed pyrolysis reactor, for carrying coal to moving bed pyrolysis reactor;
Moving bed pyrolysis reactor, be provided with solid product relief outlet and pyrolysis coal gas relief outlet, for coal and high-temp circulating ash pyrolysis, obtain pyrolysis coal gas, pyrolysis coal gas relief outlet is connected with moving-bed gasification stove by pipeline, and pyrolyzing coal pneumatic transmission is entered moving-bed gasification stove;
Screening washer, be connected with the solid product relief outlet of moving bed pyrolysis reactor, solid product is sieved, be provided with the lower relief outlet of sieve and the upper relief outlet of sieve, under described sieve, relief outlet is connected with circular fluid bed by pipeline, burn away for the circulating ash under sieve and powdery semicoke are sent into circular fluid bed, on sieve, relief outlet is connected with semicoke distributor duct, for the granular carbocoal on sieve is sent into semicoke divider;
Semicoke divider, for distributing granular carbocoal, semicoke divider is connected with the central tube conduit of moving-bed gasification stove and cyclonic separator respectively, for semicoke is assigned to moving-bed gasification stove and cyclonic separator;
Moving-bed gasification stove, for semicoke and pyrolyzing coal solid/liquid/gas reactions, purification pyrolysis coal gas;
Cyclonic separator, be connected with moving-bed gasification boiler tube road, for purifying the gas that moving-bed gasification stove produces, described cyclonic separator pipe core top is communicated with half coke bin, for passing through semicoke, half coke bin lower end is connected with revert pipe, and described revert pipe is connected with moving-bed gasification stove, and the semicoke for half coke bin that will pass through sends into moving-bed gasification stove;
Active carbocoal sifter, be connected with the solid product relief outlet pipeline of moving-bed gasification stove, for distributing moving-bed gasification stove solid product, active carbocoal on sieve is derived by pipeline by active carbocoal sifter, and the powdery semicoke under sieve and dust are sent circular fluid bed back to by pipeline and burnt.
The hole diameter of sieve (perforated) plate 1-10mm of described screening washer; The hole diameter of sieve (perforated) plate 1-10mm of described active carbocoal sifter; Moving bed pyrolysis temperature of reactor 400-700 DEG C, moving-bed gasification furnace temperature 700-1000 DEG C, burning in circulating fluid bed boiler temperature 800-1100 DEG C.
The utility model is from the reactivity of coal, high volatile coal experiences pyrolysis, gasification and burning three processes successively, in pyrolysis or gasification, the powdery semicoke of the low value that grain breakage produces or powdered activated semicoke enter circulating fluidized bed combustion, costly granular carbocoal finally makes active carbocoal, as the field such as sorbent material, support of the catalyst, low-volatile coal, coal gangue, low grade coal directly enter circulating fluidized bed combustion, reasonably make use of excellent, bad coal resources, realize staged conversion and utilization, resources and environment problem can be solved better.
The utility model is dexterously using the primary purifying device of moving-bed gasification stove as pyrolysis coal gas, most of dust that pyrolysis gas is carried is separated in vapourizing furnace, there are following 2 benefits simultaneously: 1, because the temperature in vapourizing furnace is higher than pyrolysis oven, therefore there is not the time condensation problem of tar in vapourizing furnace, reduce energy consumption and purification cost; 2, under pyrolysis temperature, the semicoke of (400-700 DEG C) enters vapourizing furnace reactor, and semicoke temperature is close to gasifier temperature, so the energy consumption of moving-bed gasification stove and oxygen-consumption are very low.
Further, the utility model adopts semicoke divider that semicoke is divided into two portions, a part is directly used in vapourizing furnace, another part enters vapourizing furnace after being applied to dedusting material again, solve in actual procedure and there is pyrolysis oil gas dustiness greatly, easily cause line clogging and dust-laden tar to be difficult to the problem utilized.And the powdered activated semicoke that produces of the powdery semicoke that produces of pyrolysis reactor of the present utility model and vapourizing furnace and dust enter burning in circulating fluid bed boiler, exist without solid waste in final solid phase prod active carbocoal, avoid the secondary separation process of product.
Compared with the prior art, the utility model can not only by-product active carbocoal, and gained coal gas is the gas mixture of coke(oven)gas and synthetic gas, improves hydrogen-to-carbon ratio compared with common synthetic gas, be more suitable for synthetic liquid fuel, and aerogenesis composition can control flexibly according to operational condition.
The utility model overcomes existing technique Problems existing, by circular fluid bed and moving-bed pyrolysis of coal reactor and moving-bed coal gasification reactor organic coupling, essence is that the semicoke that pyrolysis produces is isolated pyrolysis reactor, enter gasification installation, moving-bed gasification stove is as the refining plant of pyrolysis coal gas simultaneously, plays the effect to the online dedusting of pyrolysis coal gas.Activated coke after gasification as by product to going out reactive system.Like this, by the organic assembling of pyrolysis-gasification-burning three phases, the Interest frequency achieving coal resources utilizes, solve the object of gasification gas, pyrolysis coal gas high-efficient purification simultaneously, realize the combination producing of heat, electricity, tar, coal gas, activated coke, this system can according to the factor such as coal characteristic, the market requirement simultaneously, the output of adjustment product flexibly, realize economic benefit to greatest extent, be adapted at using the thermal power plant of circular fluid bed generating to use.
Accompanying drawing explanation
Fig. 1 is system architecture schematic diagram of the present utility model.
Embodiment
As shown in Figure 1, coal pyrolytic gasified polygenerations systeme based on circulating fluidized bed of the present utility model, low grade coal or low-volatile coal directly enter circular fluid bed 1 from coal bunker 3 by coal chute 11 and burn, the high-temp circulating ash of circular fluid bed is utilized in moving bed pyrolysis reactor 4, to carry out pyrolysis as the high volatile coal of thermal barrier to the volatile matter 15%-45% from pyrolysis coal bunker 2, obtain pyrolysis coal gas, wherein, by regulating the ratio of circulating ash and feed coal to control pyrolysis temperature, the variation range of pyrolysis temperature is at 400-700 DEG C.The solid product that pyrolysis reactor is discharged enters in sifter 5 and carries out screening process, the large I of sieve plate perforate adjusts within the scope of 1-10mm, circulating ash under sieve and powdery semicoke enter circular fluid bed 1 combustion power generation by pipeline 21, temperature of combustion 800-1100 DEG C, granular carbocoal on sieve is wherein a part of after entering semicoke divider 6 enters moving-bed gasification stove 7 by pipeline 15, another part 14 enters this cyclonic separator for dedusting from vapourizing furnace cyclonic separator 9 top by the road, and send into moving-bed gasification stove 7 by the revert pipe under cyclonic separator, moving-bed gasification stove 7 passes into air (oxygen) respectively by pipeline 19 and 20 and water vapour carries out gasification reaction, can according to the inlet of air (oxygen) and water vapour, can by gasification reaction temperature 700-1000 DEG C of adjustment.The coal gas of moving bed pyrolysis reactor 4 output enters moving-bed gasification stove 7 by pipeline 10 at high operating temperatures, utilizes the semicoke particle in moving-bed gasification stove 7 to realize pyrolysis gas purification, the coal pyrolysis gas (hydrogen after rough purification, carbon monoxide, carbonic acid gas, methane, ethane, ethene, propane, propylene, tar steam etc.) and vapourizing furnace produce synthetic gas (mainly hydrogen, carbon monoxide, methane, carbonic acid gas) jointly enter cyclonic separator 9 and carry out deep purifying, cyclonic separator 9 its namely there is the feature of ordinary cyclones separator, on pipe core, introduce the semicoke particle of stacking states simultaneously, thus possessed the feature of Bed Filtration, it is the difunctional cyclonic separator that a cleaning action is given prominence to, thus obtain clean mixed gas, then through cooling, electrically trapped tar oil technique reclaims coal tar, non-condensable gases can use as combustion gas or synthetic gas after desulfurization, enter active carbocoal sifter 8 from the solid product of moving-bed gasification stove 7 discharge and carry out screening process, sieve obtains active carbocoal, by pipeline 18 guiding system, the powdery semicoke under sieve and dust 22 are sent circular fluid bed 1 back to and are burnt by the road.
Claims (4)
1., based on a coal pyrolytic gasified polygenerations systeme for circulating fluidized bed, comprising:
Circular fluid bed, is connected with moving bed pyrolysis pipe reactor, for providing high-temp circulating ash to moving bed pyrolysis reactor;
Pyrolysis coal bunker, is connected with moving bed pyrolysis reactor, for carrying coal to moving bed pyrolysis reactor;
Moving bed pyrolysis reactor, be provided with solid product relief outlet and pyrolysis coal gas relief outlet, for coal and high-temp circulating ash pyrolysis, obtain pyrolysis coal gas, pyrolysis coal gas relief outlet is connected with moving-bed gasification stove by pipeline, and pyrolyzing coal pneumatic transmission is entered moving-bed gasification stove;
Screening washer, be connected with the solid product relief outlet of moving bed pyrolysis reactor, solid product is sieved, be provided with the lower relief outlet of sieve and the upper relief outlet of sieve, under described sieve, relief outlet is connected with circular fluid bed by pipeline, burn away for the circulating ash under sieve and powdery semicoke are sent into circular fluid bed, on sieve, relief outlet is connected with semicoke distributor duct, for the granular carbocoal on sieve is sent into semicoke divider;
Semicoke divider, for distributing granular carbocoal, semicoke divider is connected with the central tube conduit of moving-bed gasification stove and cyclonic separator respectively, for semicoke is assigned to moving-bed gasification stove and cyclonic separator;
Moving-bed gasification stove, for semicoke and pyrolyzing coal solid/liquid/gas reactions, purification pyrolysis coal gas;
Cyclonic separator, be connected with moving-bed gasification boiler tube road, for purifying the gas that moving-bed gasification stove produces, described cyclonic separator pipe core top is communicated with half coke bin, for passing through semicoke, half coke bin lower end is connected with revert pipe, and described revert pipe is connected with moving-bed gasification stove, and the semicoke for half coke bin that will pass through sends into moving-bed gasification stove;
Active carbocoal sifter, be connected with the solid product relief outlet pipeline of moving-bed gasification stove, for distributing moving-bed gasification stove solid product, active carbocoal on sieve is derived by pipeline by active carbocoal sifter, and the powdery semicoke under sieve and dust are sent circular fluid bed back to by pipeline and burnt.
2. the coal pyrolytic gasified polygenerations systeme based on circulating fluidized bed according to claim 3, is characterized in that: the hole diameter of sieve (perforated) plate 1-10mm of described screening washer.
3. the coal pyrolytic gasified polygenerations systeme based on circulating fluidized bed according to claim 3, is characterized in that: the hole diameter of sieve (perforated) plate 1-10mm of described active carbocoal sifter.
4. the coal pyrolytic gasified polygenerations systeme based on circulating fluidized bed according to claim 3, it is characterized in that: moving bed pyrolysis temperature of reactor 400-700 DEG C, moving-bed gasification furnace temperature 700-1000 DEG C, burning in circulating fluid bed boiler temperature 800-1100 DEG C.
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| CN201420558876.3U CN204151306U (en) | 2014-09-26 | 2014-09-26 | A kind of coal pyrolytic gasified polygenerations systeme based on circulating fluidized bed |
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| CN201420558876.3U CN204151306U (en) | 2014-09-26 | 2014-09-26 | A kind of coal pyrolytic gasified polygenerations systeme based on circulating fluidized bed |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104263419A (en) * | 2014-09-26 | 2015-01-07 | 山西潞安环保能源开发股份有限公司 | Coal pyrolysis and gasification polygeneration process based on circulating fluidized bed and coal pyrolysis and gasification polygeneration system based on circulating fluidized bed |
| CN104726117A (en) * | 2015-04-03 | 2015-06-24 | 河南龙成煤高效技术应用有限公司 | Coal pyrolysis apparatus |
-
2014
- 2014-09-26 CN CN201420558876.3U patent/CN204151306U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104263419A (en) * | 2014-09-26 | 2015-01-07 | 山西潞安环保能源开发股份有限公司 | Coal pyrolysis and gasification polygeneration process based on circulating fluidized bed and coal pyrolysis and gasification polygeneration system based on circulating fluidized bed |
| CN104726117A (en) * | 2015-04-03 | 2015-06-24 | 河南龙成煤高效技术应用有限公司 | Coal pyrolysis apparatus |
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Granted publication date: 20150211 Termination date: 20150926 |
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