CN103604128B - Method for utilizing waste heat of low-concentration combustible materials in tail gas of Slapple furnace - Google Patents
Method for utilizing waste heat of low-concentration combustible materials in tail gas of Slapple furnace Download PDFInfo
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- CN103604128B CN103604128B CN201310566784.XA CN201310566784A CN103604128B CN 103604128 B CN103604128 B CN 103604128B CN 201310566784 A CN201310566784 A CN 201310566784A CN 103604128 B CN103604128 B CN 103604128B
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Abstract
The invention provides a method for utilizing waste heat of low-concentration combustible materials in tail gas of a Slapple furnace. The technical scheme includes that the low-concentration tail gas with a heat value lower than 450Kcal/m<3> flows into a 'U'-shaped settling chamber (5), is subjected to inertial separation and then flows into a secondary combustion chamber (6), air is distributed in the secondary combustion chamber by the aid of an air distribution chamber (7) and is ignited by a heat accumulator (16) with the temperature ranging from 400 DEG C to 600 DEG C, the combustible tail gas is ignited, is sufficiently combusted in a combustion chamber (8) with a long flue and is gradually expanded in the long flue, combusted high-temperature flue gas flows into a heat-pipe heat exchanger (10) at a low flow rate, internal resistance of the heat exchanger is lower than 10mmH<2>O, a coal economizer (13) performs heat exchange, the tail gas flows through desulfurization dust removal equipment (15) and then is exhausted into the atmosphere, and high-grade steam generated in a waste heat boiler (9) flows to a heat accumulation chamber (2) to be supplied to the Slapple activation furnace (1), so that activated carbon can be manufactured. The method has the advantages that the low-grade waste heat can be sufficiently utilized, pollution emission can be reduced, and a system is high in reliability and can be operated and maintained easily and conveniently.
Description
The present invention is application number is 201210048224.0, the divisional application of denomination of invention " in a kind of Stepple furnace tail gas low-concentration combustibles bootstrap system and method ".
Technical field
The present invention relates to the residual-heat utilization method of low-concentration combustibles, especially relate to Slapple activating furnace low concentration using waste heat from tail gas and utilize and field of purification.
Background technology
Utilizing Stepple furnace to produce in active carbon process, at high temperature there is specific reaction with oxygen or hydrogen or steam in coal, produces special gas, liquid or solid product, produce a large amount of gas by-products, release a large amount of heat.Can supervene fuel gas and the solid combustible tail gas of low concentration, because its concentration, temperature are all very low, calorific value is less than 400Kcal/Nm simultaneously
3, and due to the restriction of equipment, fresh water (FW) equality factor, be difficult to direct utilization.Often be considered to " waste gas " that not directly utilizes.Mostly adopt the mode of discharging directly into atmosphere at present, not only pollute air but also cause energy waste.The method that patent of invention CN200810119157.0 " method of comprehensive utilization of activation furnace flue gas " and existing document adopt, does not all relate to afterburning and the burning of low concentration tail gas combustible, can not make full use of the low-concentration combustibles in tail gas.Under energy-saving and cost-reducing large policy, the energy waste brought by it and environmental problem, caused the attention of country.
Summary of the invention
The present invention fully burns low-concentration combustibles in Stepple furnace tail gas, realize the low-grade using waste heat from tail gas of Slapple activating furnace to utilize, provide a kind of low concentration tail gas surely to fire burning, do not affect the low grade residual heat Application way of activating process, and realize the object of tail gas clean-up.
The technical solution used in the present invention is: low-concentration combustibles residual-heat utilization method in a kind of Stepple furnace tail gas, calorific value is lower than 450Kcal/m
3low concentration tail gas, enter after " U " type expansion chamber (5) carries out inertial separation and enter afterburning chamber (6), ignited by distribution plenum (7) air distribution, 400 DEG C of-600 DEG C of heat storages (16) in afterburning chamber, flammable tail gas is lighted, and in long flue Burning Room (8) Thorough combustion, tail gas is dilatation gradually in long flue, and the high-temperature flue gas after burning enters heat exchange of heat pipe (10) with low flow velocity, and heat exchanger internal resistance is lower than 10mmH
20, economizer (13) carries out exchange heat, and last tail gas enters air after desulfurating dust-removing equipment (15).The high-grade steam produced in waste heat boiler (9) returns regenerator (2) supply Slapple activating furnace (1) and produces active carbon.
Described residual-heat utilization method is realized by bootstrap system, and described bootstrap system comprises: Slapple activating furnace (1), regenerator (2) flue shutter (3), expansion chamber (5), afterburning chamber (6), distribution plenum (7), long flue Burning Room (8), waste heat boiler (9), heat exchange of heat pipe (10), steam return line (11), economizer (12), water softener (13), desulfurating dust-removing equipment (15), heat storage (16), described Slapple activating furnace (1) is connected with regenerator (2), regenerator (2) afterbody is provided with flue, flue shutter (3) is installed in flue, described expansion chamber (5) is connected with flue, the distribution plenum (7) of array distribution air distribution outlet and afterburning are installed with heat storage (16) in expansion chamber (5), long flue Burning Room (8) is installed at distribution plenum (7) rear portion, long flue Burning Room (8) afterbody connects fume emission passage, is disposed with heat exchanger (10) in fume emission passage, economizer (12), fume emission passage tail end connects desulfurating dust-removing equipment (15), described heat exchanger (10) and waste heat boiler (9) carry out heat exchange, economizer (12) is communicated with water softener (13), running water is introduced into water softener (13), enter economizer (12) again, after enter waste heat boiler (9), high-grade steam through waste heat boiler heating returns regenerator (2) through steam recurrent canal (11), and active carbon is produced in supply Slapple activating furnace (1), install multiple distribution plenum (7) in described afterburning chamber (6), the air distribution point of distribution plenum edge height and circumferentially One's name is legion, is provided with checker brick multiaspect heat storage (16) in distribution plenum.
Heat exchanger adopts low flow velocity heat convection, and described flow velocity is less than 4m/s.
The length of described long flue Burning Room (8) is the distance of 3 times of upper lower drums.
The invention has the beneficial effects as follows: adopt multiple spot air distribution incineration technology, achieve the smooth combustion under steady flame constant temperature of low concentration tail gas; Adopt long distance combustion technology, add the exhaust combustion time, fuel gas realizes dilatation gradually, reduces volume heat load (<120kw/m
3) and flowing local resistance, solve furnace wall heatproof problem; Heat exchanger adopts low flow velocity heat convection, and heat exchanger resistance is less than 50mmH
2o, avoids UTILIZATION OF VESIDUAL HEAT IN to affect the technique (namely stove keeps tiny structure in reacting furnace) of active carbon production line.By the enforcement of these technology, under the condition ensureing process for preparing activated carbon, achieve low-grade tail gas and fully burn utilization, again reduce disposal of pollutants, system reliability is high simultaneously, simple and convenient operation and maintenance.
Accompanying drawing explanation
Accompanying drawing 1 is low-concentration combustibles bootstrap system schematic diagram in Stepple furnace tail gas.
In figure: 1, activation furnace, 2, regenerator, 3, flue shutter, 4, former flue, 5, expansion chamber, 6, afterburning chamber, 7, distribution plenum, 8, long flue Burning Room, 9, waste heat boiler, 10, heat exchange of heat pipe, 11, steam return line, 12, economizer, 13, water softener, 14, running water, 15 desulfurating dust-removing equipments, 16 heat storages.
Detailed description of the invention
Below in conjunction with drawings and Examples, the invention will be further described (for 3000 kg/d output active carbon production lines).
As shown in Figure 1, low-concentration combustibles residual-heat utilization method in a kind of Stepple furnace tail gas, calorific value is lower than 450Kcal/m
3low concentration tail gas, enter after " U " type expansion chamber (5) carries out inertial separation and enter afterburning chamber (6), ignited by distribution plenum (7) air distribution, 400 DEG C of-600 DEG C of heat storages (16) in afterburning chamber, flammable tail gas is lighted, and in long flue Burning Room (8) Thorough combustion, tail gas is dilatation gradually in long flue, and the high-temperature flue gas after burning enters heat exchange of heat pipe (10) with low flow velocity, and heat exchanger internal resistance is lower than 10mmH
20, economizer (13) carries out exchange heat, and last tail gas enters air after desulfurating dust-removing equipment (15).The high-grade steam produced in waste heat boiler (9) returns regenerator (2) supply Slapple activating furnace (1) and produces active carbon.
The system realizing above-mentioned residual-heat utilization method is as follows: flue shutter 3 installed by the former flue 4 in regenerator 2 rear portion, by from regenerator out containing the tail gas of low-concentration combustible gas, introduce residual neat recovering system, first tail gas enter " U " type flue 5, tail gas carries out inertial separation, is deposited by flying dust and discharges, enter afterburning chamber 6 afterwards, the multiple distribution plenum 7 of afterburning indoor location, distribution plenum height and lower drum on waste heat boiler are apart from identical, and distribution plenum is multiple air distribution point circumferentially.The step of afterburning is first by auxiliary combustion heat storage body 16, makes regenerator temperature reach 400-600 DEG C, then ignites with the checker brick multiaspect heat storage of heat storage, fuel gas is lighted.Tail gas realizes Thorough combustion in long flue Burning Room 8, and tail gas increases at long flue burning time, and gas realizes dilatation gradually.High-temperature flue gas after burning, enters heat exchange of heat pipe 10 successively, and economizer 12 carries out heat exchange with the working medium in heat exchanger, and tail gas, finally by desulfurating dust-removing equipment 15, enters air except after dust and sulfur.Working-medium water in economizer 12 is from water softener 13, soft water after economizer preheating 12 preheating generating high-grade steam in waste heat boiler after heat exchange of heat pipe 10 heat exchange, steam turns back to regenerator through steam return line 11, and supply Slapple activating furnace 1 produces active carbon.
The results showed, after adopting this low concentration residual-heat utilization method, the tail gas finally entered in air obtains cleaning, and exhaust emissions is up to state standards requirement.Combustible in tail gas is fully burned.The heat of release can turn back to active carbon production line, also may be used on heating for residential area etc.Achieve energy-saving and emission-reduction.
Above-mentioned detailed description of the invention is used for explaining and the present invention is described, instead of limits the invention, and in the protection domain of spirit of the present invention and claim, any amendment make the present invention and change, all fall into protection scope of the present invention.
Claims (1)
1. a low-concentration combustibles residual-heat utilization method in Slapple activating furnace tail gas, the system that described residual-heat utilization method utilizes comprises: Slapple activating furnace (1), regenerator (2), flue shutter (3), expansion chamber (5), afterburning chamber (6), distribution plenum (7), long flue Burning Room (8), waste heat boiler (9), heat exchange of heat pipe (10), steam return line (11), economizer (12), water softener (13), desulfurating dust-removing equipment (15), heat storage (16), described Slapple activating furnace (1) is connected with regenerator (2), regenerator (2) afterbody is provided with flue, flue shutter (3) is installed in flue, described expansion chamber (5) is connected with flue, the distribution plenum (7) of array distribution air distribution outlet and afterburning are installed with heat storage (16) in expansion chamber (5), long flue Burning Room (8) is installed at distribution plenum (7) rear portion, long flue Burning Room (8) afterbody connects fume emission passage, is disposed with heat exchange of heat pipe (10) in fume emission passage, economizer (12), fume emission passage tail end connects desulfurating dust-removing equipment (15), described heat exchange of heat pipe (10) and waste heat boiler (9) carry out heat exchange, economizer (12) is communicated with water softener (13), running water is introduced into water softener (13), enter economizer (12) again, after enter waste heat boiler (9), the high-grade steam heated through waste heat boiler (9) returns regenerator (2) through steam return line (11), and active carbon is produced in supply Slapple activating furnace (1), in described afterburning chamber (6), multiple distribution plenum (7) is installed, the air distribution point of distribution plenum (7) edge height and circumferentially One's name is legion, checker brick multiaspect heat storage (16) is installed in distribution plenum (7), the length of described long flue Burning Room (8) is the distance of 3 times of upper lower drums, it is characterized in that: calorific value is lower than 450Kcal/m
3low concentration tail gas, enter after " U " type expansion chamber (5) carries out inertial separation and enter afterburning chamber (6), ignited by distribution plenum (7) air distribution, 400 DEG C of-600 DEG C of heat storages (16) in afterburning chamber (6), flammable tail gas is lighted, and in long flue Burning Room (8) Thorough combustion, tail gas dilatation gradually in long flue Burning Room (8), high-temperature flue gas after burning enters heat exchange of heat pipe (10) with low flow velocity, and heat exchange of heat pipe (10) internal resistance is lower than 10mmH
20, enter economizer (13) again and carry out exchange heat, last tail gas enters air after desulfurating dust-removing equipment (15), the high-grade steam produced in waste heat boiler (9) returns regenerator (2) supply Slapple activating furnace (1) and produces active carbon, and described low flow velocity is the flow velocity being less than 4m/s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310566784.XA CN103604128B (en) | 2012-02-29 | 2012-02-29 | Method for utilizing waste heat of low-concentration combustible materials in tail gas of Slapple furnace |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310566784.XA CN103604128B (en) | 2012-02-29 | 2012-02-29 | Method for utilizing waste heat of low-concentration combustible materials in tail gas of Slapple furnace |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201210048224 Division CN103292333B (en) | 2012-02-29 | 2012-02-29 | System for utilizing waste heat of low-concentration combustible material in tail gas of Slapple furnace |
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| CN103604128A CN103604128A (en) | 2014-02-26 |
| CN103604128B true CN103604128B (en) | 2014-12-24 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103968673A (en) * | 2014-05-13 | 2014-08-06 | 神华集团有限责任公司 | Waste heat utilization device of tail gas of Serp activation furnace and tail gas utilization method |
| CN110805910A (en) * | 2019-10-31 | 2020-02-18 | 安徽中泰创展环境科技股份有限公司 | Secondary combustion chamber for household garbage flue gas |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201096352Y (en) * | 2007-11-05 | 2008-08-06 | 邹炎 | Gas-solid mixing combustion purifying and heat distribution system |
| CN101608794A (en) * | 2009-07-27 | 2009-12-23 | 太原嘉能动力科技有限公司 | The UTILIZATION OF VESIDUAL HEAT IN method of low-concentration combustibles |
| CN101705331A (en) * | 2009-11-06 | 2010-05-12 | 清华大学 | Sensible heat recovering system and method of tail gas of converter with afterburning |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201096352Y (en) * | 2007-11-05 | 2008-08-06 | 邹炎 | Gas-solid mixing combustion purifying and heat distribution system |
| CN101608794A (en) * | 2009-07-27 | 2009-12-23 | 太原嘉能动力科技有限公司 | The UTILIZATION OF VESIDUAL HEAT IN method of low-concentration combustibles |
| CN101705331A (en) * | 2009-11-06 | 2010-05-12 | 清华大学 | Sensible heat recovering system and method of tail gas of converter with afterburning |
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