CN101362954A - Semi-coke gas multifuel combustion furnace - Google Patents
Semi-coke gas multifuel combustion furnace Download PDFInfo
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- CN101362954A CN101362954A CNA2008100133826A CN200810013382A CN101362954A CN 101362954 A CN101362954 A CN 101362954A CN A2008100133826 A CNA2008100133826 A CN A2008100133826A CN 200810013382 A CN200810013382 A CN 200810013382A CN 101362954 A CN101362954 A CN 101362954A
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- gas
- semicoke
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- oil shale
- coke
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Abstract
The invention provides a device which heats circular methane during the dry distillation process of oil shale and is characterized in that smoke which is generated by the mixed burning of semi-coke and methane is used to heat the circular methane to a temperature of about 500 DEG C; the device can sufficiently use the thermal value of fixed carbon in the semi-coke of dry distilled byproducts, thus solving the problem that low-grade oil shale can not use the full circulation dry distillation process and the semi-coke with low thermal value can not be utilized effectively. The device is applicable for distilling the oil shale which has various grades and uses full circulation dry distillation process, saves the energy and protects the environment, and has small dust and low energy dissipation.
Description
Affiliated technical field
The present invention is a kind of device that in oil shale distillation process circulating mash gas is heated.It is characterized in that the flue gas that utilizes semicoke and gas multifuel combustion to produce is heated to circulating mash gas about 500 ℃.This device can make full use of the calorific value of fixed carbon in the destructive distillation byproduct semicoke, can not use the not problem of good utilisation of recycle to extinction distillation process and low heat value semicoke thereby solved low grade oil shale.
Background technology
Generally believe that gas recycle to extinction technology is state-of-the-art in the world technology in the oil shale distillation process at present, but this technology is not suitable for oil-containing, contains the low resinous shale of fugitive constituent.Reason is the needs that the heat of the gas generation behind the burning receipts oil can not satisfy the gas retort heat.And the most of shale oil length of China are lower than 7%, have restricted the use of this technology.So the square stove in popular fushun retort oven, Shaanxi does not adopt recycle to extinction technology, and use internal combustion type or half internal combustion type gas retort, make the oil recovery rate be lower than 70%, very uneconomical, wasted resource.In addition, the semicoke that uses internal combustion type or half internal combustion type destructive distillation to produce, calorific value is lower than 500Kcal/Kg mostly, is difficult to utilize, and can only be used for baking bricks or going out of use, and causes environmental pollution.
Summary of the invention
The object of the present invention is to provide a kind of low grade oil shale that can make to use advanced recycle to extinction technology, the gas heating furnace that low-calorie semicoke is utilized effectively solves the technical bottleneck problem of restriction oil shale industry development.
Adopted the technology of semicoke and gas multifuel combustion for this reason.Principle of work and technical process are: the low heat value semicoke feeds from the top of chain furnace, slowly advances the ejection from the burning at burner hearth middle part is chewed of fuel gas on traveling-grate stoker, burning rapidly, produce high temperature, the low heat value semicoke is reached more than the burning-point also take fire, after-flame gradually in traveling process.The flue gas transversal flow heat exchanger that burning produces will be heated to about 500 ℃ by the mobile circulating mash gas in pipe.The semicoke afterburnt enters the slag bath of water seal at the chain furnace rear portion, transport with scraper conveyer again.Tail gas is admitted to drying machine preheating ore, and heat is fully used.
All do not utilize at present both at home and abroad the method for low heat value semicoke and gas multifuel combustion to come heating cycle gas.The process furnace of heating cycle gas generally all adopts geseous fuel.The boiler of lower heat of combustion fuel has and adopts fluidization technology, and the abrasive dust technology of adopting is arranged.But dustiness is big in these method flue gases, and galling is big, and after-treatment device is big, and energy consumption is also big.Compare with these methods, the present invention has tangible advantage.The one, the calorific value that coal-char combustion produces has replenished the problem of gas combustion shortage of heat effectively, makes the recycle to extinction distillation process can be used for the destructive distillation of low grade oil shale.The 2nd, in the oil shale distillation process, not only reclaim the calorific value of semicoke, and reduced the aftertreatment pressure of destructive distillation byproduct semicoke effectively.The 3rd, energy-conserving and environment-protective, dust is little, and energy consumption is low.
Description of drawings
Accompanying drawing is the vertical planning drawing of semi-coke gas multifuel combustion furnace.Among the figure, 1, exhanst gas outlet; 2, cold gas import; 3, hot gas export; 4, exhanst gas outlet; 5, burner hearth; 6, burning is chewed; 7, hopper; 8, tubular heat exchanger; 9, chain furnace.
Embodiment
Of the present invention be embodied in: one, burner hearth keeps about 1000 ℃ temperature, and is low excessively as temperature, can suitably strengthen the supply of fuel gas; Two, make semicoke after-flame on fire grate, can adjust the traveling-grate stoker rotating speed, when incomplete combustion, can reduce the gait of march of fire grate, strengthen the supply of gas, until the whole after-flames of semicoke.The heating furnace structure that accompanying drawing provides can effectively guarantee the realization of above-mentioned technical requirements.
Claims (3)
1, a kind of device that in oil shale distillation process, circulating mash gas is heated.It is characterized in that the flue gas that adopts semicoke and gas multifuel combustion to produce is heated to 500 ℃ with circulating mash gas.
2, process furnace according to claim 1, the burning of semicoke is carried out on traveling-grate stoker, and gas is ejected in the burner hearth from the burning at burner hearth middle part is chewed and burns.The degree of semicoke after-flame realizes with the input of adjusting gas and chain fire-gate speed.
3, process furnace according to claim 1, the high-temperature flue gas that semicoke and gas mixed firing produce will be heated to 500 ℃ by the mobile circulating mash gas in the pipe type heat transfer organ pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100133826A CN101362954B (en) | 2008-09-26 | 2008-09-26 | Semi-coke gas multifuel combustion furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100133826A CN101362954B (en) | 2008-09-26 | 2008-09-26 | Semi-coke gas multifuel combustion furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101362954A true CN101362954A (en) | 2009-02-11 |
| CN101362954B CN101362954B (en) | 2011-03-23 |
Family
ID=40389564
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100133826A Expired - Fee Related CN101362954B (en) | 2008-09-26 | 2008-09-26 | Semi-coke gas multifuel combustion furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101362954B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104479704A (en) * | 2014-12-30 | 2015-04-01 | 东北电力大学 | Oil shale semicoke fluidized combustion circulation gas heating technology |
| CN104498074A (en) * | 2014-12-30 | 2015-04-08 | 东北电力大学 | Gas distillation process employing heat pipe heating oil shale |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2218184Y (en) * | 1994-12-06 | 1996-01-24 | 祝文革 | High temperature and high performance indirect air heating furnace |
-
2008
- 2008-09-26 CN CN2008100133826A patent/CN101362954B/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104479704A (en) * | 2014-12-30 | 2015-04-01 | 东北电力大学 | Oil shale semicoke fluidized combustion circulation gas heating technology |
| CN104498074A (en) * | 2014-12-30 | 2015-04-08 | 东北电力大学 | Gas distillation process employing heat pipe heating oil shale |
| CN104498074B (en) * | 2014-12-30 | 2016-02-24 | 东北电力大学 | A kind of heat-pipe heating type oil shale distillation coal mine gas technique |
| CN104479704B (en) * | 2014-12-30 | 2017-02-22 | 东北电力大学 | Oil shale semicoke fluidized combustion circulation gas heating technology |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101362954B (en) | 2011-03-23 |
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Granted publication date: 20110323 Termination date: 20160926 |
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