CN101608794A - The UTILIZATION OF VESIDUAL HEAT IN method of low-concentration combustibles - Google Patents
The UTILIZATION OF VESIDUAL HEAT IN method of low-concentration combustibles Download PDFInfo
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- CN101608794A CN101608794A CNA2009100749705A CN200910074970A CN101608794A CN 101608794 A CN101608794 A CN 101608794A CN A2009100749705 A CNA2009100749705 A CN A2009100749705A CN 200910074970 A CN200910074970 A CN 200910074970A CN 101608794 A CN101608794 A CN 101608794A
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Abstract
The UTILIZATION OF VESIDUAL HEAT IN method of low-concentration combustibles, belong to industrial low concentration combustible exhaust gas process field, problem to be solved by this invention is: provide a kind of the low concentration combustible exhaust gas is rationalized the method for utilizing again of burning, for addressing the above problem the technical solution used in the present invention be: low-concentration combustible gas enters expansion chamber after discharging, make tail gas carry out inertial separation earlier, enter afterburning chamber again, carry out afterburning, after the afterburning temperature reaches 900-1100 ℃, stop combustion-compensating device, tail gas continues to enter Burning Room and burns, and by waste heat boiler UTILIZATION OF VESIDUAL HEAT IN is got up then; The UTILIZATION OF VESIDUAL HEAT IN method of low-concentration combustibles of the present invention is applicable to the recycling of tail gas in industry such as coal conversion industry such as coking, active carbon, charcoal element, coal gasification liquefaction, carbon black and steel-making industry.
Description
Technical field
The UTILIZATION OF VESIDUAL HEAT IN method of low-concentration combustibles of the present invention belongs to industrial low concentration combustible exhaust gas process field.
Background technology
The energy is the important substance basis that guarantees social stability and development national economy, and the world today sharply increases the consumption quantity of the energy, and the shade of energy crisis is shrouding All Around The World.The energy-saving and cost-reducing basic principle that has become the countries in the world energy industry.
Under energy-saving and cost-reducing big policy, industrial waste gas is very important important component part, by its environmental problem of bringing, has caused the attention of country.At present in the coal conversion industry, as industry and steel-making industries such as coking, active carbon, charcoal element, coal gasification liquefaction, carbon blacks, all there is the flammable tail gas of different class to produce, and because the restriction of equipment level, fresh water (FW) equality factor, the tail gas recycle rate is less than 30%, and mostly recovery section be high heat value gas, can't regain because its concentration is low, temperature is low, calorific value is low a large amount of low grade residual heat tail gas, adopts the discharging directly into atmosphere method to handle.Low-concentration combustibles refers to the waste heat tail gas of calorific value less than 600Kcal/Nm3, is the energy that present technology is difficult for recovery, and whole discharging directly into atmosphere also are the chief components of energy-saving and emission-reduction.
Summary of the invention
The present invention proposes a kind of UTILIZATION OF VESIDUAL HEAT IN method of low-grade low-concentration combustibles, low-concentration combustibles is rationalized burn back heat exchange utilization.
The present invention is by the following technical solutions: low-concentration combustible gas is introduced into expansion chamber after discharging, make tail gas carry out inertial separation, enter afterburning chamber then, carry out afterburning, after the afterburning temperature reaches 900-1100 ℃, stop combustion-compensating device, tail gas continues to enter Burning Room and burns, and by heat-exchanger rig UTILIZATION OF VESIDUAL HEAT IN is got up then.The step of afterburning is to heat heat storage by auxiliary combustion earlier, makes regenerator temperature reach 400-600 ℃, and the checker brick multiaspect heat storage with heat storage ignites then, and fuel gas is fully burnt.Heat-exchanger rig is a waste heat boiler.
The beneficial effect that the UTILIZATION OF VESIDUAL HEAT IN method of low-concentration combustibles of the present invention compared with prior art has: expansion chamber can make the dust of tail gas carry out sedimentation, the concentration of emission that helps tail gas on the one hand is up to standard, help on the other hand no longer taking away energy after dirt because of tail gas falls, can make the tail gas of low concentration in burning, form stable temperature field.The UTILIZATION OF VESIDUAL HEAT IN method of low-concentration combustibles of the present invention will be applied in some low concentration waste heat exhaust emissions industries as active carbon, charcoal element etc., can not utilize waste gas to be used in a large number in the past, and effects of energy saving and emission reduction is remarkable.To produce three kiloton Activated Carbon Production lines per year is profit, can save 2690 tons of mark coals every year, produces a profit 3,800,000 yuan.Be calculated as follows: (3 tons of boilers with a production line adapted calculate)
Boiler is per hour used heat Q
The time=202.4 ten thousand kilocalories/hour
Boiler year is used heat Q
Year=202.4 * 24 * 33,0=1,603,008 ten thousand kilocalories
If use the coal-burning boiler steam supply, boiler efficiency η=85% is pressed standard coal (7000 kilocalorie/kilogram) and is calculated, the then annual mark coal 1603008/ (0.85 * 0.7 * 1000)=2694 ton/year saved.
Boiler year steam production 3 * 24 * 330=23760 ton is pressed 160 yuan of/ton calculating of national regulation market price, year realization benefit 160 * 23760=3801600 unit=3,800,000 yuan.
The specific embodiment
The low-concentration combustible gas that comes out from retort or activation furnace is introduced into expansion chamber after discharging, make tail gas carry out inertial separation, granular substance sedimentations such as the dust in the tail gas, gas enters afterburning chamber then, the step of afterburning is earlier by auxiliary combustion heating heat storage, make regenerator temperature reach 400-600 ℃, checker brick multiaspect heat storage with heat storage ignites then, fuel gas is fully burnt, utilize exotic fuels such as oil, afterburning is carried out in combustion gas etc., and its space temperature is raise, by inner accumulation of heat checker brick ignite fuel gas and little carbon granule, after the afterburning temperature reaches 900-1100 ℃, stop combustion-compensating device, tail gas continues to enter Burning Room and burns, by the smooth combustion of inner accumulation of heat checker brick, enter waste heat apparatus by crossing flue at last, UTILIZATION OF VESIDUAL HEAT IN is got up by waste heat boiler.After tail gas burns, enter waste heat boiler and carry out heat exchange, need to determine the waste heat boiler amount of capacity after tail gas burns through heat Balance Calculation.But the heat exchanger symmetric arrangement of waste heat boiler, the layout of heat convection heating surface have adopted low flow velocity design, make the heat exchanger resistance less than 10mmH
2O; The special deposition space of waste heat boiler bottom plays the smoke abatement and dust control effect.
Claims (3)
1, the UTILIZATION OF VESIDUAL HEAT IN method of low-concentration combustibles, it is characterized in that: low-concentration combustible gas is introduced into expansion chamber after discharging, make tail gas carry out inertial separation, enter afterburning chamber then, carry out afterburning, the afterburning temperature stops afterburning after reaching 900-1100 ℃, tail gas continues to enter Burning Room and burns, and by heat-exchanger rig UTILIZATION OF VESIDUAL HEAT IN is got up then.
2, the UTILIZATION OF VESIDUAL HEAT IN method of low-concentration combustibles according to claim 1, it is characterized in that: the step of afterburning is for heating heat storage by auxiliary combustion earlier, make regenerator temperature reach 400-600 ℃, the checker brick multiaspect heat storage with heat storage ignites then, and fuel gas is fully burnt.
3, the UTILIZATION OF VESIDUAL HEAT IN method of low-concentration combustibles according to claim 1 and 2 is characterized in that: heat-exchanger rig is a waste heat boiler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100749705A CN101608794A (en) | 2009-07-27 | 2009-07-27 | The UTILIZATION OF VESIDUAL HEAT IN method of low-concentration combustibles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100749705A CN101608794A (en) | 2009-07-27 | 2009-07-27 | The UTILIZATION OF VESIDUAL HEAT IN method of low-concentration combustibles |
Publications (1)
| Publication Number | Publication Date |
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| CN101608794A true CN101608794A (en) | 2009-12-23 |
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| CNA2009100749705A Pending CN101608794A (en) | 2009-07-27 | 2009-07-27 | The UTILIZATION OF VESIDUAL HEAT IN method of low-concentration combustibles |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103292333A (en) * | 2012-02-29 | 2013-09-11 | 太原嘉能动力科技有限公司 | System and method for utilizing waste heat of low-concentration combustible material in tail gas of Slapple furnace |
| CN103604128A (en) * | 2012-02-29 | 2014-02-26 | 中北大学 | Method for utilizing waste heat of low-concentration combustible materials in tail gas of Slapple furnace |
| CN103991869A (en) * | 2014-05-05 | 2014-08-20 | 贵州黎平奥捷炭素有限公司 | Phosphoric acid activated carbon activating furnace waste-heat utilization and tail-gas absorption device |
| CN114984731A (en) * | 2022-04-27 | 2022-09-02 | 衢州大通锅炉有限责任公司 | Bamboo charcoal kiln waste gas waste heat recovery system and waste gas purification method |
-
2009
- 2009-07-27 CN CNA2009100749705A patent/CN101608794A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103292333A (en) * | 2012-02-29 | 2013-09-11 | 太原嘉能动力科技有限公司 | System and method for utilizing waste heat of low-concentration combustible material in tail gas of Slapple furnace |
| CN103292333B (en) * | 2012-02-29 | 2013-12-25 | 太原嘉能动力科技有限公司 | System for utilizing waste heat of low-concentration combustible material in tail gas of Slapple furnace |
| CN103604128A (en) * | 2012-02-29 | 2014-02-26 | 中北大学 | Method for utilizing waste heat of low-concentration combustible materials in tail gas of Slapple furnace |
| CN103604128B (en) * | 2012-02-29 | 2014-12-24 | 中北大学 | Method for utilizing waste heat of low-concentration combustible materials in tail gas of Slapple furnace |
| CN103991869A (en) * | 2014-05-05 | 2014-08-20 | 贵州黎平奥捷炭素有限公司 | Phosphoric acid activated carbon activating furnace waste-heat utilization and tail-gas absorption device |
| CN103991869B (en) * | 2014-05-05 | 2016-08-24 | 贵州黎平奥捷炭素有限公司 | A kind of phosphatase activity carbon activation furnace UTILIZATION OF VESIDUAL HEAT IN and tail gas absorption equipment |
| CN114984731A (en) * | 2022-04-27 | 2022-09-02 | 衢州大通锅炉有限责任公司 | Bamboo charcoal kiln waste gas waste heat recovery system and waste gas purification method |
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Open date: 20091223 |