CN201339939Y - Intermediate temperate dechlorination waste incineration system capable of inhabiting dioxin - Google Patents
Intermediate temperate dechlorination waste incineration system capable of inhabiting dioxin Download PDFInfo
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- CN201339939Y CN201339939Y CNU2008202340262U CN200820234026U CN201339939Y CN 201339939 Y CN201339939 Y CN 201339939Y CN U2008202340262 U CNU2008202340262 U CN U2008202340262U CN 200820234026 U CN200820234026 U CN 200820234026U CN 201339939 Y CN201339939 Y CN 201339939Y
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- cyclone separator
- convection pass
- heating surface
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- high temperature
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
Abstract
The utility model provides an intermediate temperate dechlorination waste incineration system capable of inhabiting dioxin, which comprises a furnace chamber, a high-temperature cyclone separator, a low temperature superheater and a low-stage convection pass, wherein the high-temperature cyclone separator is arranged at the position of the outlet of the furnace chamber, the low temperature superheater is communicated with the high-temperature cyclone separator through a convection pass, and the low-stage convection pass is disposed behind the low-stage convection pass. The furnace chamber is equipped with a combustion chamber, a waste feed port, an auxiliary fuel feed port, a water screen, an air distributing plate and a return included tube. The lower portion of the high-temperature cyclone separator is equipped with an external heat exchanger including a high temperature superheater inside, the external heat exchanger is communicated with the furnace chamber through the return included tube, a coal economizer and an air preheater are sequentially arranged inside the low-stage convection pass, and an intermediate-temperature cyclone separator is arranged between the low temperature superheater and the low-stage convection pass. Consequently, without adding any additive agent, the utility model avoids or reduces dioxin production. The added intermediate-temperature cyclone separator can gain two advantages by a single move, i.e. not only separate produced dioxin precursor, but also separate flying ash, thereby improving furnace efficiency, and combing the advantages of environment protection and saving energy.
Description
Technical field
The invention belongs to field of environment protection, relate to a kind of refuse burning system, particularly a kind of middle temperature dechlorination refuse burning system that suppresses the bioxin generation.
Background technology
Bioxin is meant that the chlorine-containing organic compounds dioxin (dioxins) that contains two phenyl ring of one or two oxygen key connection is many chloros dibenzodioxin English (polychlorinated dibenzo-p-dioxins, be called for short PCDDs) and the general designation of many chloros dibenzofurans (polychlorinated dibenzofurans, abbreviation PCDFs).They are chloro tricyclic aromatics, have similar physics, chemical property and biological effect.Because the position difference that the chlorine atom replaces has constituted 75 kinds of PCDDs and 135 kinds of PCDFs.
Bioxin is mainly derived from burning and Chemical Manufacture.Burning city domestic garbage holds the urban garbage disposal technology of minimizing, innoxious and resource as a kind of height minus, comes into one's own day by day in the whole world in recent years.Although waste incineration has many advantages, waste incineration unavoidably will produce a certain amount of dioxin, build burning city domestic garbage factory and just must consider that dioxin pollutes control problem.
The reason that is formed with two aspects of incinerator Zhong bioxin: being to sneak into De dioxins materials in the rubbish on the one hand, is that incinerator produces bioxin on the other hand in the combustion refuse process.Their formation mechanism has three kinds of forms: 1. high temperature is synthetic, and promptly High Temperature Gas generates PCDD/F mutually.Initial stage drying stage in rubbish enters incinerator, the low-boiling-point organic compound volatilization back and airborne oxygen reaction generation carbon dioxide and water that dewater and exceptionally contain hydrocarbon composition, form temporary transient anoxic conditions, make the same hydrogen chloride of partial organic substances (HCl) reaction, generate PCDD/F.2. low temperature is from the beginning synthetic, and the organochlorine under low temperature (250 ~ 500 ℃) condition in big molecular carbon, hydrogen, oxygen molecule and the flying dust matrix generates PCDD/F.During the carbon residue oxidation, have 65% ~ 75% to change carbon monoxide into, about 1% transfers chlorobenzene to changes PCDD into, and the rate of gasification of carbon is high more in the flying dust, and the growing amount of PCDD is big more.3. predecessor is synthetic, and the inhomogeneous catalytic reaction on imperfect combustion and flying dust surface can form multiple organic gas phase predecessor, as polystream phenol and diphenyl ether, generates PCDD/F by these predecessors again.
High-temp combustion produces in the original ash content that contains aluminosilicate and contains non-volatile transition metal and carbon residue.Fly ash granule has formed big absorption surface.Fly ash granule is when going out the burner hearth cooling, between the imperfect combustion product on the particle surface, the kinds of surface reaction takes place between imperfect combustion product and other predecessor, with non-volatile metal and salt thereof multiple condensation reaction takes place on the other hand, generate the surface-active chloride, generate through the organic reaction of multiple complexity and to be adsorbed on the lip-deep FCDD of fly ash granule, the temperature of burning away the refuse is 750 ℃ and oxygen supply the easiest generation imperfect combustion thing when not enough.Concrete any mechanism plays a leading role and will depend on the type of furnace, duty and burning condition.Exist organic or inorganic chlorine in the incinerator, have oxygen, having transition-metal cation is the prerequisite that generates PCDD as catalyst.
Therefore, need provide a kind of device can effectively suppress burning process Zhong generation of dioxin.
Summary of the invention
The purpose of this utility model is the mechanism that forms at known technology Zhong bioxin, a kind of middle temperature dechlorination refuse burning system that bioxin generates that suppresses is provided, with the flying dust that produces in the waste incineration process, particularly contain as the flying dust of the transition-metal cation of catalyst and contain muriatic flying dust or flying dust matrix in the soot particle of organochlorine separate, in 500 ℃ of-700 ℃ of intervals, warm cyclone separator separates it deviate from the utilization, avoid the low temperature of bioxin synthetic, warm dechlorination effectively suppresses the purpose that bioxin generates in reaching.
The technical scheme taked of the utility model is to achieve these goals: a kind ofly suppress the middle temperature dechlorination refuse burning system that bioxin generates, comprise incinerator burner hearth, be arranged in the high temperature cyclone separator at furnace outlet place, the low temperature superheater that communicates with high temperature cyclone separator through convection pass and be located at thereafter subordinate's convection pass.Wherein, high temperature cyclone separator is arranged in furnace outlet, and the circulation segregated combustion reduces carbon residue and produces.Be provided with combustion chamber and water-cooling wall in the burner hearth, hearth wall is provided with garbage feeding mouth and auxiliary fuel material inlet, lower furnace portion is provided with air distribution plate, the middle and lower part is provided with overfiren air port, the burner hearth rear portion is communicated with the returning charge inclined tube, formed highly organized waste incineration and blowing system, make rubbish can be in the combustion chamber fully smooth combustion, reduce bioxin and generate.The high temperature cyclone separator bottom is provided with the external heat exchanger that includes high temperature superheater, external heat exchanger is communicated with by the returning charge inclined tube with burner hearth, the ash that high temperature cyclone separator separates returns the burner hearth circulating combustion by the returning charge inclined tube, is provided with economizer and air preheater in subordinate's convection pass in turn.
Between described low temperature superheater and the subordinate's convection pass promptly at 500 ℃ of-700 ℃ of sections of flue-gas temperature, warm cyclone separator in being provided with, separate to get rid of predecessor, can with contain as the flying dust of the transition-metal cation of catalyst and contain muriatic flying dust or flying dust matrix in the soot particle of organochlorine separate.Flue gas through in behind the warm cyclone separator convection heating surface ash amount reduce, it is synthetic again to help reducing to greatest extent bioxin, improves boiler efficiency simultaneously.
In order rationally to reduce flue-gas temperature, be provided with heating surface in the convection pass between described high temperature cyclone separator and the low temperature superheater.
Described heating surface is a convection heating surface, and convection heating surface comprises evaporating heating surface, overheated heating surface or heating heating surface.
Warm cyclone separator is single hose or multiclone in described.
Flue gas through after the high temperature cyclone separator separation enters convection pass, through heating surface, low temperature superheater cooling, and in the time of 500 ℃-700 ℃, warm cyclone separator in entering (middle temperature dechlorination), temperature separation in carrying out.The soot particle that will contain predecessor is separated, and is got rid of by middle temperature cyclone separator (middle temperature dechlorination) bottom, enters ash-slag disposal system; Through in the flue gas separated of warm cyclone separator, enter subordinate's convection pass, pass through economizer and air preheater successively, leave warm dechlorination system in the waste incineration, enter exhaust gas purification system.
The beneficial effects of the utility model are: compared with prior art, the utility model is without any need for additive (for example calcium oxide etc.), avoid or reduce the generation of bioxin, wherein, the middle temperature cyclone separator that increases has the effect of killing two birds with one stone, not only deviate to produce the bioxin predecessor, but also deviate from flying dust, improved boiler efficiency, had environmental protection and energy-saving advantages again concurrently.
Description of drawings
Fig. 1 is the structural representation of the middle temperature dechlorination refuse burning system of inhibition bioxin generation described in the utility model.
Among the figure: warm cyclone separator, 13 economizers, 14 air preheaters, 15 water-cooling walls, 16 drums, 17 air distribution plates in 1 burner hearth, 2 garbage feeding mouths, 3 auxiliary fuel material inlets, 4 combustion chambers, 5 overfire air ports, 6 high temperature cyclone separators, 7 external heat exchangers, 8 high temperature superheaters, 9 returning charge inclined tubes, 10 convection heating surfaces, 11 low temperature superheaters, 12.
The specific embodiment
The utility model is described in further detail below in conjunction with the drawings and specific embodiments, but not as to qualification of the present utility model.
As shown in Figure 1 a kind of suppresses the middle temperature dechlorination refuse burning system that bioxin generates, comprise incinerator burner hearth 1, be arranged in the high temperature cyclone separator 6 at furnace outlet place, the low temperature superheater 11 that communicates with high temperature cyclone separator 6 through convection pass and be located at thereafter subordinate's convection pass.Wherein, be provided with combustion chamber 4 and water-cooling wall 15 in the burner hearth 1, hearth wall is provided with garbage feeding mouth 2 and auxiliary fuel material inlet 3, and lower furnace portion is provided with air distribution plate 17, and the middle and lower part is provided with overfire air port 5, and burner hearth 1 rear portion is communicated with returning charge inclined tube 9.High temperature cyclone separator 6 bottoms are provided with the external heat exchanger 7 that includes high temperature superheater 8, external heat exchanger 7 is communicated with by returning charge inclined tube 9 with burner hearth 1, the ash that the temperature cyclone separator separates returns burner hearth 1 circulating combustion by returning charge inclined tube 9, is provided with economizer 13 and air preheater 14 in subordinate's convection pass in turn.Warm cyclone separator 12 in being provided with between described low temperature superheater 11 and the subordinate's convection pass.
Operation principle of the present utility model:
Rubbish enters burner hearth 1 by garbage feeding mouth 2, carries out combination drying and fluidized bed combustion with a wind on air distribution plate 17, and 4 mix further with the secondary wind of overfire air port 5 ejection and to burn in the combustion chamber.When refuse thermal value is low, mix the auxiliary fuel auxiliary combustion by auxiliary fuel material inlet 3.
The flue gas that burning produces enters high temperature cyclone separator 6 through the furnace outlet on burner hearth 1 top; enter external heat exchanger 7 through the bulky grain ash after high temperature cyclone separator 6 separation by the returning charge leg; bulky grain ash through be arranged on high temperature superheater 8 in the external heat exchanger 7 and carry out heat exchange after; enter combustion chamber 4 burning that circulates once more by returning charge inclined tube 9 again; reach abundant burning, reduce the purpose of carbon residue.
Pass through the flue gas that high temperature cyclone separator 6 separates, draw by top and enter convection pass, pass through and convection heating surface 10, low temperature superheater 11 warm cyclone separator 12 in entering successively.Described convection heating surface 10 comprises evaporating heating surface, overheated heating surface or heating heating surface.
The flue-gas temperature that enters warm cyclone separator 12 will reach this temperature between 500 ℃-700 ℃, can utilize the design of evaporating heating surface 10 or low temperature superheater 11 is regulated.In warm cyclone separator 12 design efficiencies greater than 98%.The soot particle that the overwhelming majority contains precursor is separated, and enters ash-slag disposal system and drains.
Through in the flue gas of warm cyclone separator 12 after separating, dust burdening seldom, this flue gas through with economizer 13, air preheater 14 heat exchange cooling after enter the tail flue gas cleaning system.Warm cyclone separator 12 can be designed to the single hose cyclone separator in described; Also can be multiclone, normally 2-4 manages.
Therefore, system described in the utility model is without any need for additive (for example calcium oxide etc.), avoid or reduce the generation of bioxin, wherein, the middle temperature cyclone separator that increases has the effect of killing two birds with one stone, not only deviate to produce the bioxin predecessor, but also deviate from flying dust, improved boiler efficiency, had environmental protection and energy-saving advantages again concurrently.
Above-described embodiment, the utility model specific embodiment a kind of more preferably just, the common variation that those skilled in the art carries out in the technical solutions of the utility model scope and replacing all should be included in the protection domain of the present utility model.
Claims (4)
1. one kind is suppressed the middle temperature dechlorination refuse burning system that bioxin generates, comprise incinerator burner hearth, be arranged in the high temperature cyclone separator at furnace outlet place, the low temperature superheater that communicates with high temperature cyclone separator through convection pass and be located at thereafter subordinate's convection pass; Wherein, burner hearth is provided with combustion chamber, garbage feeding mouth, auxiliary fuel material inlet, water-cooling wall, air distribution plate and returning charge inclined tube, the high temperature cyclone separator bottom is provided with the external heat exchanger that includes high temperature superheater, external heat exchanger is communicated with by the returning charge inclined tube with burner hearth, the ash that high temperature cyclone separator separates returns the burner hearth circulating combustion by the returning charge inclined tube, is provided with economizer and air preheater in subordinate's convection pass in turn; It is characterized in that: warm cyclone separator in being provided with between described low temperature superheater and the subordinate's convection pass, the cigarette temperature is between 500 ℃ ~ 700 ℃ herein.
2. warm dechlorination refuse burning system in according to claim 1 is characterized in that: be provided with heating surface in the convection pass between described high temperature cyclone separator and the low temperature superheater.
3. warm dechlorination refuse burning system in according to claim 2 is characterized in that: described heating surface is a convection heating surface, and convection heating surface comprises evaporating heating surface, overheated heating surface or heating heating surface.
According to the arbitrary claim of claim 1-3 described in warm dechlorination refuse burning system, it is characterized in that: warm cyclone separator is single hose or multiclone in described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202340262U CN201339939Y (en) | 2008-12-31 | 2008-12-31 | Intermediate temperate dechlorination waste incineration system capable of inhabiting dioxin |
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| Application Number | Priority Date | Filing Date | Title |
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| CNU2008202340262U CN201339939Y (en) | 2008-12-31 | 2008-12-31 | Intermediate temperate dechlorination waste incineration system capable of inhabiting dioxin |
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| CN201339939Y true CN201339939Y (en) | 2009-11-04 |
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| CNU2008202340262U Expired - Lifetime CN201339939Y (en) | 2008-12-31 | 2008-12-31 | Intermediate temperate dechlorination waste incineration system capable of inhabiting dioxin |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101725989B (en) * | 2009-12-31 | 2012-08-22 | 北京中科通用能源环保有限责任公司 | Retardant adding system for retarding generation of dioxins |
| CN107990331A (en) * | 2017-12-28 | 2018-05-04 | 华西能源工业股份有限公司 | The waste incineration CFB boiler that a kind of two-stage gas-solid separating device is successively arranged |
| CN107990322A (en) * | 2017-12-28 | 2018-05-04 | 华西能源工业股份有限公司 | A kind of waste incineration CFB boiler of cyclone separator and membrane type separation apparatuses in series |
| CN108006685A (en) * | 2017-12-28 | 2018-05-08 | 华西能源工业股份有限公司 | A kind of waste incineration CFB boiler of multistage gas-solid separating device arranged in series |
| CN110772969A (en) * | 2019-10-31 | 2020-02-11 | 同济大学 | Method for inhibiting generation of dioxins in solid waste incineration flue gas by using calcium oxide |
| CN111330942A (en) * | 2020-02-28 | 2020-06-26 | 上海交通大学 | Low temperature pre-dechlorination method and device for low dioxin thermochemical conversion process |
| CN111810962A (en) * | 2020-05-09 | 2020-10-23 | 安徽海螺建材设计研究院有限责任公司 | Cement kiln coprocessing solid waste dechlorination device |
| CN115899732A (en) * | 2022-10-26 | 2023-04-04 | 河南省锅炉压力容器安全检测研究院 | Structure for retarding corrosion of pipeline on heating surface of waste incineration boiler |
-
2008
- 2008-12-31 CN CNU2008202340262U patent/CN201339939Y/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101725989B (en) * | 2009-12-31 | 2012-08-22 | 北京中科通用能源环保有限责任公司 | Retardant adding system for retarding generation of dioxins |
| CN107990331A (en) * | 2017-12-28 | 2018-05-04 | 华西能源工业股份有限公司 | The waste incineration CFB boiler that a kind of two-stage gas-solid separating device is successively arranged |
| CN107990322A (en) * | 2017-12-28 | 2018-05-04 | 华西能源工业股份有限公司 | A kind of waste incineration CFB boiler of cyclone separator and membrane type separation apparatuses in series |
| CN108006685A (en) * | 2017-12-28 | 2018-05-08 | 华西能源工业股份有限公司 | A kind of waste incineration CFB boiler of multistage gas-solid separating device arranged in series |
| CN108006685B (en) * | 2017-12-28 | 2024-06-21 | 华西能源工业股份有限公司 | Multistage gas-solid separation device series arrangement's msw incineration CFB boiler |
| CN110772969A (en) * | 2019-10-31 | 2020-02-11 | 同济大学 | Method for inhibiting generation of dioxins in solid waste incineration flue gas by using calcium oxide |
| CN111330942A (en) * | 2020-02-28 | 2020-06-26 | 上海交通大学 | Low temperature pre-dechlorination method and device for low dioxin thermochemical conversion process |
| CN111330942B (en) * | 2020-02-28 | 2021-11-23 | 上海交通大学 | Low temperature pre-dechlorination method and device for low dioxin thermochemical conversion process |
| CN111810962A (en) * | 2020-05-09 | 2020-10-23 | 安徽海螺建材设计研究院有限责任公司 | Cement kiln coprocessing solid waste dechlorination device |
| CN115899732A (en) * | 2022-10-26 | 2023-04-04 | 河南省锅炉压力容器安全检测研究院 | Structure for retarding corrosion of pipeline on heating surface of waste incineration boiler |
| CN115899732B (en) * | 2022-10-26 | 2023-07-28 | 河南省锅炉压力容器安全检测研究院 | Structure for slowing down pipeline corrosion of heating surface of garbage incineration boiler |
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Granted publication date: 20091104 |