CN102690666A - Gas-solid combined type heat-carrying oil shale fluidized bed dry distilling system - Google Patents
Gas-solid combined type heat-carrying oil shale fluidized bed dry distilling system Download PDFInfo
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- CN102690666A CN102690666A CN2012101893955A CN201210189395A CN102690666A CN 102690666 A CN102690666 A CN 102690666A CN 2012101893955 A CN2012101893955 A CN 2012101893955A CN 201210189395 A CN201210189395 A CN 201210189395A CN 102690666 A CN102690666 A CN 102690666A
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Abstract
The invention relates to a gas-solid combined type heat-carrying oil shale fluidized bed dry distilling system. The bottom of the fluidized bed dry distilling furnace of the fluidized bed dry distilling system is divided into high temperature and low temperature dry distilling chambers; heat-carrying modes that the gas functions primarily and the hot ash functions secondarily and the hot ash functions primarily and the gas functions secondarily are adopted; the dry distilling time of the oil shale is prolonged effectively; the shale oil is prevented from secondary cracking because of over-high dry distilling temperature; the efficient, clean and economic utilization of the oil shale resource is realized; and the system is applicable to the comprehensive utilization technology of the oil shale. Compared with the prior art, the technology can improve the qualities of the shale oil and the gas; the integration of the oil shale fluidized bed dry distilling furnace and a half-cock circulation fluidized bed shale ash circulation loop is realized; the complexity of the system is reduced effectively; the energy loss and environment pollution during the process are reduced; and the operation security of the system is improved.
Description
Technical field
The invention belongs to oil shale resources and utilize technical field; Relate to a kind of oil shale fluidized bed dry distillation system; Be specifically related to a kind of heat ash that generates with the CFBC semicoke and cycling hot gas jointly as the gas-solid built-up type heat-carrying oil shale fluidized bed dry distillation system of carbonization furnace thermal barrier; Be suitable for the resinous shale comprehensive utilization technique, can realize efficient, the cleaning and the economic utilization of oil shale resources.
Background technology
Resinous shale is a kind of important potential energy source, and low-temperature pyrolysis can obtain the shale oil of similar natural oil.In fossil oil, its reserves are converted to that thermal value is only second to coal and second of row, and as it being converted to shale oil, the shale oil reserves are about more than 4,000 hundred million tons in the world, are equivalent to 3 times of present world oil reserves; China's oil shale resources are 7,199.37 hundred million tons, and the reserves that are converted to shale oil are 476.44 hundred million tons.
The development and use of resinous shale have more than 200 year history; Mainly utilizing approach is refining shale oil and directly combustion power generation, heat supply; This single product utilizes form owing to there are some problems such as resource utilization is low, technology is immature, environmental pollution is serious, anti-market economy property impact capacity difference, is difficult to sustainable development.In view of China's " energy medium-term and long-term development planning outline " and current crude oil, electric power and building supplies intense situation day by day; Chinese invention patent " resinous shale comprehensive utilization method " (ZL 200510024417.2) and " the combined gas, heating, cooling and electricity system application system of resinous shale " (ZL 200510025253.5) have successively proposed the resinous shale comprehensive utilization technique route of " oil shale oil-refining, coal-char combustion power generation, shale ashes building materials utilize " from different perspectives, for the huge oil shale resources of reserves provide efficient, a clean approach that utilizes.On the basis of these two patents; (application number: 201110217501.1) further propose: hot ash that generates as the coal-char combustion use device, with CFBC as carbonization furnace, with circulating fluidized bed with the bubbling bed and cycling hot gas are jointly as the gas retort thermal barrier for Chinese invention patent " bed destructive distillation of resinous shale bubbling and semicoke CFBC combined system "; The high temperature semicoke that discharge bubbling bed bottom is directly sent into the circulating fluidized bed internal combustion; The high-temperature flue gas that produces mixes the back with the high-temperature flue gas that nondestructive inspection gas burner enters and gets into gas-solid separator, and the flying dust that separates is sent to bubbling bed, returning charge valve and external placed type gas-solid interchanger respectively.This invention system convergence is compact, and environmental pollution is light, power loss is little, is expected to significantly improve shale oil productive rate and quality.The present invention will be on this basis; A kind of gas-solid built-up type heat-carrying oil shale fluidized bed dry distillation system of concrete proposition; Success realization oil shale fluidized bed dry distillation stove and semicoke circulating fluidized bed shale ashes circulation loop are integrated; Effectively prolong the oil shale distillation time, avoid shale oil that second pyrolysis takes place because of pyrolysis temperature is too high simultaneously.
Summary of the invention
The object of the invention is exactly the oil shale fluidized bed dry distillation system that a kind of gas-solid built-up type heat-carrying is provided for the defective that overcomes above-mentioned prior art existence; And realize that successfully oil shale fluidized bed dry distillation stove and semicoke circulating fluidized bed shale ashes circulation loop are integrated; Improve shale oil and gas quality; Effectively reduce the system complex degree, improve system's safety in operation.
The object of the invention can be realized through following technical scheme:
Gas-solid built-up type heat-carrying oil shale fluidized bed dry distillation system, this system comprises fluidized bed dry distillation stove, resinous shale storehouse, gas-solid separator, gas-liquid separator, water-and-oil separator, low temperature fluidized bed dry distillation chamber, high temperature fluidized bed destructive distillation chamber, returning charge valve, semicoke circulating fluidized bed, shale ashes storehouse, shale ashes separator.Said modules adopts following mode to connect: resinous shale storehouse lower part outlet is connected with fluidized bed dry distillation furnace bottom low temperature fluidized bed dry distillation chamber resinous shale inlet; Top, low temperature fluidized bed dry distillation chamber riser is connected with high temperature fluidized bed destructive distillation chamber semicoke inlet; Top, high temperature fluidized bed destructive distillation chamber riser is connected with returning charge valve solid particle inlet; The returning charge valve outlet port is connected with semicoke circulating fluidized bed fuel inlet; The outlet of semicoke circulating fluidized bed top is connected with the shale ashes separator inlet, and the ash outlet of shale ashes separator bottom is connected with shale ashes storehouse inlet, and shale ashes storehouse lower part outlet is connected with fluidized bed dry distillation stove shale ashes inlet; The outlet of fluidized bed dry distillation stove top is connected with the gas-solid separator inlet; The outlet of gas-solid separator semicoke is connected with fluidized bed dry distillation furnace bottom low temperature fluidized bed dry distillation chamber semicoke inlet, and the gas-solid separator pneumatic outlet is connected with the gas-liquid separator inlet, and the gas-liquid separator liquid exit is connected with the water-and-oil separator inlet.
Described fluidized-bed is as gas-solid built-up type carbonization furnace, and heat ash that produces with the semicoke CFBC and cycling hot gas are as thermal barrier, and the bottom is provided with low temperature fluidized bed dry distillation chamber and high temperature fluidized bed destructive distillation chamber.
Low temperature fluidized bed dry distillation chamber with cycling hot gas be main thermal barrier and fluidized wind, with the heat ash as the auxiliary heat carrier, high temperature fluidized bed destructive distillation chamber with the heat ash as main thermal barrier, with circulating mash gas as auxiliary heat carrier and fluidized wind.
The high temperature semicoke that described fluidized bed dry distillation stove destructive distillation produces is directly sent into semicoke circulating fluidized bed internal combustion through the returning charge valve.
Described fluidized bed dry distillation stove and semicoke circulating fluidized bed shale ashes circulation loop combine together.
System works principle of the present invention is: the oil shale particle of 0～20mm is stored in the resinous shale storehouse, is advanced into the low temperature fluidized bed dry distillation chamber of fluidized bed dry distillation stove down, and pyrolysis produces shale oil steam, gas, water vapour and semicoke; Low temperature fluidized bed dry distillation chambers temp maintains in 430～460 ℃ of scopes, with cycling hot gas as fluidized wind and main thermal source, with hot shale ashes as auxiliary thermal source; The indoor semicoke of low temperature fluidized bed dry distillation gets into high temperature fluidized bed destructive distillation chamber by the top riser, and further shale oil steam and gas are separated out in pyrolysis; High temperature fluidized bed destructive distillation chambers temp is controlled at 520～550 ℃, with hot shale ashes as main thermal source, with cycling hot gas as fluidized wind and auxiliary thermal source; The indoor semicoke of high temperature fluidized bed destructive distillation is discharged by top, high temperature fluidized bed destructive distillation chamber riser with shale ashes, is delivered to the semicoke circulating fluidized bed through the returning charge valve; Semicoke is in semicoke circulating fluidized bed internal combustion, heat release, and the high-temperature flue gas of generation carries flying dust and gets into the shale ashes separator by the outlet of semicoke circulating fluidized bed top, and the shale ashes that separate fall into the shale ashes storehouse; A part of shale ashes are sent into the fluidized bed dry distillation stove as thermal barrier in the shale ashes storehouse, and wherein: the main thermal source of most of conduct is sent into high temperature fluidized bed destructive distillation chamber, and the residual heat shale ashes are sent into low temperature fluidized bed dry distillation chamber as auxiliary thermal source; Shale oil steam, gas and water vapor that low temperature fluidized bed dry distillation chamber and high temperature fluidized bed destructive distillation chamber produce and circulating mash gas are formed the gaseous state thing; Carry small amount of solid semicoke powder and get into gas-solid separator by the outlet of fluidized bed dry distillation furnace roof portion; The semicoke powder that separates returns low temperature fluidized bed dry distillation chamber; Gaseous state thing after the dedusting flow through successively gas-liquid separator and water-and-oil separator form gas, shale oil and water respectively again.
Compared with prior art, the present invention has the following advantages:
(1) the fluidized bed dry distillation furnace bottom is divided into low temperature and two destructive distillation chambers of high temperature, and low temperature fluidized bed dry distillation chambers temp is controlled in 430～460 ℃ of scopes, is fluidized wind and main thermal source with the circulating mash gas, is auxiliary thermal source with hot ash; High temperature fluidized bed destructive distillation chambers temp is controlled at 520～550 ℃, is main thermal source with the heat ash, is auxiliary thermal source and fluidized wind with the circulating mash gas.Resinous shale through low temperature fluidized bed dry distillation chamber, gets into high temperature fluidized bed destructive distillation chamber earlier again, has effectively prolonged the oil shale distillation time, has avoided shale oil generation second pyrolysis simultaneously, has improved the quality of destructive distillation product;
(2) the high temperature semicoke of oil shale distillation generation directly is conveyed into the processing of semicoke circulating fluidized bed internal combustion through the returning charge valve, has reduced power loss and environmental pollution midway;
(3) realize that oil shale fluidized bed dry distillation stove and semicoke circulating fluidized bed shale ashes circulation loop are integrated, effectively reduce the system complex degree, reduced power loss.Through regulating the share that the shale ashes storehouse gets into low temperature fluidized bed dry distillation chamber and high temperature fluidized bed destructive distillation chamber heat ash, realized the energy balance of each device in the system.
(4) semicoke and the cycling hot ash of oil shale distillation generation are sent into the semicoke circulating fluidized bed through the returning charge valve, have reduced the possibility that semicoke and hot ash return the fluidized bed dry distillation stove, have avoided gas to reveal and inclusion of air, have improved system's safety in operation.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Among the figure, 1 is the fluidized bed dry distillation stove, and 2 is the resinous shale storehouse, and 3 is gas-solid separator; 4 is gas-liquid separator, and 5 is water-and-oil separator, and 6 is low temperature fluidized bed dry distillation chamber, and 7 is high temperature fluidized bed destructive distillation chamber; 8 are the returning charge valve, and 9 is the semicoke circulating fluidized bed, and 10 is the shale ashes storehouse, and 11 is the shale ashes separator.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the present invention is elaborated.
Embodiment
Gas-solid built-up type heat-carrying oil shale fluidized bed dry distillation system; Its structure is as shown in Figure 1, and this system comprises fluidized bed dry distillation stove 1, resinous shale storehouse 2, gas-solid separator 3, gas-liquid separator 4, water-and-oil separator 5, low temperature fluidized bed dry distillation chamber 6, high temperature fluidized bed destructive distillation chamber 7, returning charge valve 8, semicoke circulating fluidized bed 9, shale ashes storehouse 10, shale ashes separator 11.Said modules adopts following mode to connect: resinous shale storehouse 2 lower part outlets are connected with low temperature fluidized bed dry distillation chamber, fluidized bed dry distillation stove 1 bottom 6 resinous shale inlet; Low temperature fluidized bed dry distillation chamber 6 top risers are connected with high temperature fluidized bed destructive distillation chamber 7 semicokes inlet; High temperature fluidized bed destructive distillation chamber 7 top risers are connected with returning charge valve 8 solid particle inlets; 8 outlets of returning charge valve are connected with semicoke circulating fluidized bed 9 fuel inlets; The outlet of semicoke circulating fluidized bed 9 tops is connected with shale ashes separator 11 inlets, and the ash outlet of shale ashes separator 11 bottoms is connected with shale ashes storehouse 10 inlets, and shale ashes storehouse 10 lower part outlets are connected with fluidized bed dry distillation stove 1 shale ashes inlet; The outlet of fluidized bed dry distillation stove 1 top is connected with gas-solid separator 3 inlets; The outlet of gas-solid separator 3 semicokes is connected with low temperature fluidized bed dry distillation chamber, fluidized bed dry distillation stove 1 bottom 6 semicokes inlet, and gas-solid separator 3 pneumatic outlets are connected with gas-liquid separator 4 inlets, and gas-liquid separator 4 liquid exits are connected with water-and-oil separator 5 inlets.
System works principle of the present invention is: the oil shale particle of 0～20mm is stored in the resinous shale storehouse 2, is advanced into the low temperature fluidized bed dry distillation chamber 6 of fluidized bed dry distillation stove 1 down, and pyrolysis produces shale oil steam, gas, water vapour and semicoke; Low temperature fluidized bed dry distillation chamber 6 temperature maintenance in 430～460 ℃ of scopes, with cycling hot gas as fluidized wind and main thermal source, with hot shale ashes as auxiliary thermal source; Semicoke in the low temperature fluidized bed dry distillation chamber 6 gets into high temperature fluidized bed destructive distillation chamber 7 by the top riser, and further shale oil steam and gas are separated out in pyrolysis; High temperature fluidized bed destructive distillation chamber 7 temperature are controlled at 520～550 ℃, with hot shale ashes as main thermal source, with cycling hot gas as fluidized wind and auxiliary thermal source; Semicoke in the high temperature fluidized bed destructive distillation chamber 7 is discharged by high temperature fluidized bed destructive distillation chamber 7 top risers with shale ashes, is delivered to semicoke circulating fluidized bed 9 through returning charge valve 8; Semicoke is in semicoke circulating fluidized bed 9 internal combustion, heat release, and the high-temperature flue gas of generation carries flying dust and gets into shale ashes separator 11 by the outlet of semicoke circulating fluidized bed 9 tops, and the shale ashes that separate fall into shale ashes storehouse 10; A part of shale ashes are sent into fluidized bed dry distillation stove 1 as thermal barrier in the shale ashes storehouse 10, and wherein: the main thermal source of most of conduct is sent into high temperature fluidized bed destructive distillation chamber 7, and the residual heat shale ashes are sent into low temperature fluidized bed dry distillation chamber 6 as auxiliary thermal source; The gaseous state thing is formed with shale oil steam, gas and water vapor and circulating mash gas that high temperature fluidized bed destructive distillation chamber 7 produces in low temperature fluidized bed dry distillation chamber 6; Carry small amount of solid semicoke powder and get into gas-solid separator 3 by fluidized bed dry distillation stove 1 top exit; The semicoke powder that separates returns low temperature fluidized bed dry distillation chamber 6; Gaseous state thing after the dedusting flow through successively gas-liquid separator 4 and water-and-oil separator 5 form gas, shale oil and water respectively again.
Claims (6)
1. gas-solid built-up type heat-carrying oil shale fluidized bed dry distillation system; It is characterized in that; This system comprises fluidized bed dry distillation stove (1), resinous shale storehouse (2), gas-solid separator (3), gas-liquid separator (4), water-and-oil separator (5), low temperature fluidized bed dry distillation chamber (6), high temperature fluidized bed destructive distillation chamber (7), returning charge valve (8), semicoke circulating fluidized bed (9), shale ashes storehouse (10), shale ashes separator (11), wherein:
Described resinous shale storehouse (2) lower part outlet is connected with low temperature fluidized bed dry distillation chamber (6) the resinous shale inlet of fluidized bed dry distillation stove (1) bottom; Top, low temperature fluidized bed dry distillation chamber (6) riser is connected with the semicoke inlet of high temperature fluidized bed destructive distillation chamber (7); Top, high temperature fluidized bed destructive distillation chamber (7) riser is connected with the solid particle inlet of returning charge valve (8); The outlet of returning charge valve (8) is connected with the fuel inlet of semicoke circulating fluidized bed (9); The outlet of semicoke circulating fluidized bed (9) top is connected with shale ashes separator (11) inlet; The ash outlet of shale ashes separator (11) bottom is connected with shale ashes storehouse (10) inlet; Shale ashes storehouse (10) lower part outlet is connected with the shale ashes inlet of fluidized bed dry distillation stove (1), and the outlet of fluidized bed dry distillation stove (1) top is connected with gas-solid separator (3) inlet, and the outlet of gas-solid separator (3) semicoke is connected with low temperature fluidized bed dry distillation chamber (6), fluidized bed dry distillation stove (1) bottom semicoke inlet; Gas-solid separator (3) pneumatic outlet is connected with gas-liquid separator (4) inlet, and gas-liquid separator (4) liquid exit is connected with water-and-oil separator (5) inlet.
2. a kind of gas-solid built-up type heat-carrying oil shale fluidized bed dry distillation system according to claim 1; It is characterized in that; Described fluidized bed dry distillation stove (1) is a carbonization furnace; Heat ash that produces with the semicoke CFBC and cycling hot gas are as thermal barrier, and the bottom is provided with low temperature fluidized bed dry distillation chamber (6) and high temperature fluidized bed destructive distillation chamber (7).
3. a kind of gas-solid built-up type heat-carrying oil shale fluidized bed dry distillation system according to claim 1 and 2; It is characterized in that; Described low temperature fluidized bed dry distillation chamber (6) is that fluidized wind is the auxiliary heat carrier with main thermal barrier, with hot ash with cycling hot gas, and temperature is controlled at 430～460 ℃.
4. a kind of gas-solid built-up type heat-carrying oil shale fluidized bed dry distillation system according to claim 1 and 2; It is characterized in that; Described high temperature fluidized bed destructive distillation chamber (7) is main thermal barrier, is fluidized wind and auxiliary heat carrier with cycling hot gas that with the heat ash temperature is controlled at 520～550 ℃.
5. a kind of gas-solid built-up type heat-carrying oil shale fluidized bed dry distillation system according to claim 1 is characterized in that, the semicoke that described fluidized bed dry distillation stove (1) destructive distillation produces is directly sent into semicoke circulating fluidized bed (9) internal combustion through returning charge valve (8).
6. a kind of gas-solid built-up type heat-carrying oil shale fluidized bed dry distillation system according to claim 1 is characterized in that, described fluidized bed dry distillation stove (1) is integrated with semicoke circulating fluidized bed (9) shale ashes circulation loop.
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| CN201210189395.5A CN102690666B (en) | 2012-06-08 | 2012-06-08 | Gas-solid combined type heat-carrying oil shale fluidized bed dry distilling system |
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| CN201210189395.5A CN102690666B (en) | 2012-06-08 | 2012-06-08 | Gas-solid combined type heat-carrying oil shale fluidized bed dry distilling system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103031135A (en) * | 2012-12-18 | 2013-04-10 | 中国科学院过程工程研究所 | Fluidized bed hierarchical coal pyrolysis reactor and coal pyrolysis method |
| CN111876181A (en) * | 2020-07-28 | 2020-11-03 | 胜帮科技股份有限公司 | Oil shale dry distillation device and dry distillation method |
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2012
- 2012-06-08 CN CN201210189395.5A patent/CN102690666B/en not_active Expired - Fee Related
Patent Citations (4)
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Non-Patent Citations (1)
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103031135A (en) * | 2012-12-18 | 2013-04-10 | 中国科学院过程工程研究所 | Fluidized bed hierarchical coal pyrolysis reactor and coal pyrolysis method |
| CN103031135B (en) * | 2012-12-18 | 2014-07-30 | 中国科学院过程工程研究所 | Fluidized bed hierarchical coal pyrolysis reactor and coal pyrolysis method |
| CN111876181A (en) * | 2020-07-28 | 2020-11-03 | 胜帮科技股份有限公司 | Oil shale dry distillation device and dry distillation method |
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