CN210568466U - Device for modifying high-temperature fly ash generated in waste incineration - Google Patents
Device for modifying high-temperature fly ash generated in waste incineration Download PDFInfo
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- CN210568466U CN210568466U CN201921525893.6U CN201921525893U CN210568466U CN 210568466 U CN210568466 U CN 210568466U CN 201921525893 U CN201921525893 U CN 201921525893U CN 210568466 U CN210568466 U CN 210568466U
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Abstract
The utility model discloses a device of modified waste incineration high temperature flying dust, fire burning furnace, plasma high temperature electrostatic precipitator and exhaust gas cleaner including the high temperature that connects gradually, plasma high temperature electrostatic precipitator includes the dust remover body, this internal a plurality of discharge electrodes and the board that gathers dust of being equipped with of dust remover press the flue gas flow direction, the discharge electrode sets up with the board that gathers dust in turn, still be equipped with the plasma power on the dust remover body, the positive pole and the discharge electrode of plasma power link to each other, the negative pole and the board that gathers dust of plasma power link to each other. The utility model has the advantages that: the dust collected in the furnace is changed from the original dangerous waste into the common industrial solid waste, the total amount of the fly ash at the outlet of the furnace chamber is greatly reduced, the toxicity of the fly ash is reduced, the purification after the furnace and the disposal cost of the dangerous waste are reduced, the resource utilization value of the solid waste is improved, and the dust can be collected by a dust collecting plate.
Description
Technical Field
The utility model relates to a device of modified waste incineration high temperature flying dust.
Background
The incinerator type comprises a fluidized bed, a grate furnace, a rotary kiln and the like, and the amount of fly ash generated by different incineration modes is very different. The waste gas generated in the garbage incineration process contains about 5-50 g/Nm3 dust, a large amount of unburned organic matters or organic synthetic intermediates (such as tar) are adsorbed on the surface of the dust, and the unburned organic matters or the organic synthetic intermediates (such as tar) can be synthesized again to generate toxic substances such as dioxin, furan and the like under the environmental conditions that the smoke temperature is 300-650 ℃ and HCL and Cl2 are contained.
Along with the gradient recycling of the heat energy of the waste gas in the incinerator, the environmental temperature of the waste gas and the surface temperature of the fly ash are reduced, and light tar, heavy tar, dioxin and furan chlorinated polycyclic aromatic hydrocarbon organic matters attached to the surface of the fly ash are increased, so that the concentration of the fly ash after the incinerator is high, the toxicity is high, the cost for purification treatment and solidification landfill treatment is high, and secondary leakage pollution risk is still caused after the landfill.
When the temperature of unburned organic matters (such as tar, chlorine-containing intermediate substances and the like), dioxin, furan and the like is below 200 ℃, the unburned organic matters are basically adsorbed on the surface of dust in a solid state, and low-boiling-point heavy metals (such as mercury) are condensed and enriched on the surface of fly ash, so that the dust collected by purifying waste incineration gas belongs to dangerous solid waste.
Most heavy metal elements can generate chemical reaction at high temperature to generate stable and harmless inorganic composite salt, but a small amount of low-boiling point heavy metal elements (such as mercury) still exist in a gaseous elementary substance form in a certain proportion, the removal effect of zero-valent gaseous mercury in the incinerator is limited, and the technical difficulty and the treatment cost of mercury removal during low-temperature flue gas are greatly increased after the mercury enters a low-temperature end.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a device of modified waste incineration high temperature flying dust can effectively solve the problem that the organic matter treatment cost is high after current waste incineration not burn to the greatest extent.
In order to solve the technical problem, the utility model discloses a realize through following technical scheme: the utility model provides a device of modified waste incineration high temperature flying dust, fires burning furnace, plasma high temperature electrostatic precipitator and exhaust gas cleaner including the high temperature that connects gradually, plasma high temperature electrostatic precipitator includes the dust remover body, this internal a plurality of discharge electrodes and the board that gathers dust of being equipped with of dust remover, according to the flue gas flow direction, discharge electrode and the board that gathers dust set up in turn, still be equipped with the plasma power on the dust remover body, the positive pole and the discharge electrode of plasma power link to each other, the negative pole and the board that gathers dust of plasma power link to each other.
Preferably, the length directions of the discharge electrodes and the dust collecting plate are perpendicular to the flow direction of the flue gas.
Preferably, a high-temperature flue gas heat energy recoverer is connected between the high-temperature combustion furnace and the plasma high-temperature electric dust remover.
Preferably, a medium-temperature flue gas heat energy recoverer is further connected between the plasma high-temperature electric dust remover and the waste gas purifier.
Preferably, an activated carbon ejector is further arranged between the medium-temperature flue gas heat energy recoverer and the waste gas purifier.
Preferably, the inlet flue gas temperature of the plasma high-temperature electric dust remover is 300-650 ℃.
Compared with the prior art, the utility model has the advantages that: injecting electric energy to the dust surface and waste gas in the furnace through discharge electrodes in the plasma high-temperature electric precipitator to excite and dissociate partial molecules of the smoke gas to generate a large amount of active molecules, and bombarding macromolecular organic matters (such as tar and dioxin) and chlorine-containing intermediate organic matters to degrade the macromolecular organic matters into low-toxicity small-molecule organic matters or inorganic matters (such as CO, HCl and SO)2、H2O, etc.), and low valence heavy metal vapor (e.g., Hg)0) By oxidation to a higher valence state (e.g. Hg)+、Hg2+) To interact with qiFormation of mercury salts (Hg) from HCl in the form of HCl2Cl2、HgCl2) The method changes the dust collected in the furnace from the original dangerous waste into industrial solid waste, greatly reduces the concentration of the fly ash in the flue gas at the outlet of the furnace chamber, reduces the toxicity of the fly ash, reduces the cost of purification after the furnace and treatment of the dangerous waste, and improves the resource utilization value of the solid waste.
Drawings
FIG. 1 is a schematic structural diagram of a device for modifying high-temperature fly ash from waste incineration according to the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be considered as limiting the present invention.
Reference 1 is the utility model relates to a device of modified waste incineration high temperature flying dust's embodiment, a device of modified waste incineration high temperature flying dust, including the high temperature combustion furnace 1 that connects gradually, plasma high temperature electrostatic precipitator 3, exhaust gas purifier 6, fan 7 and chimney 8, plasma high temperature electrostatic precipitator 3 includes dust remover body 31, be equipped with a plurality of discharge electrodes 32 in the dust remover body 31 and gather dust board 33, according to flue gas flow direction, discharge electrode 32 sets up with gathering dust board 33 in turn, still be equipped with plasma power 34 on the dust remover body 31, plasma power 34's anodal discharge electrode 32 links to each other, plasma power 34's negative pole links to each other with gathering dust board 33.
Injecting electric energy into the dust and the waste gas in the furnace through a discharge electrode 32 in the plasma high-temperature electric precipitator 3 to excite and dissociate partial molecules of the smoke gas to generate a large amount of active molecules, and bombarding macromolecular organic matters such as tar, dioxins and chlorine-containing intermediate organic matters to degrade the macromolecular organic matters into low-toxicity micromolecular organic matters or inorganic matters such as CO, HCl and SO2、H2O, etc. for vaporizing heavy metals in low valence state such as Hg0) By oxidation to a higher valence state, e.g. Hg+、Hg2+To form mercury salt Hg with gaseous HCl2Cl2、HgCl2) The dust collected in the furnace is changed from the original dangerous waste into the common industrial solid waste, the total amount of the fly ash at the outlet of the furnace chamber is greatly reduced, the toxicity of the fly ash is reduced, the purification after the furnace and the disposal cost of the dangerous waste are reduced, the resource utilization value of the solid waste is improved, and the dust can be collected by the dust collection plate 33.
In order to better recover the heat after combustion and simultaneously control the temperature of the flue gas entering the plasma high-temperature electric dust remover 3, a high-temperature flue gas heat energy recoverer 2 is also arranged between the high-temperature combustion furnace 1 and the plasma high-temperature electric dust remover 3 for heat recovery, so that the temperature of the flue gas entering the inlet of the plasma high-temperature electric dust remover 3 is ensured to be 300-650 ℃. In addition, a medium-temperature flue gas heat energy recoverer 4 can be connected between the plasma high-temperature electric dust remover 3 and the waste gas purifier 6, heat recovery is carried out on flue gas once again, the energy utilization rate is improved, an active carbon ejector 5 can be further arranged between the medium-temperature flue gas heat energy recoverer 4 and the waste gas purifier 6, active carbon is used for absorbing harmful substances in the treated flue gas, the active carbon with harmful substances is recovered through the waste gas purifier 6, and the standard reaching performance of the discharged flue gas is further improved.
The waste gas purifier adopted in the device usually adopts a circulating semidry method (such as a circulating fluidized bed method and the like, CFB for short), quicklime and slaked lime are used as deacidification agents, the temperature of the flue gas at the outlet of the reaction tower is reduced to about 130-150 ℃ by spraying water for cooling, and the desulfurized reaction byproducts are collected by a bag type dust collector; the high-temperature flue gas heat energy recoverer and the medium-temperature flue gas heat energy recoverer are both water-medium indirect heat exchangers; an activated carbon injector: the device consists of an active carbon bin, a metering device, a Roots blower, a material receiver and an ejector, wherein the ejector is traditional powder material conveying equipment manufactured by utilizing a Venturi principle.
The optimal synthesis temperature of the dioxin and the furan is within the range of 300-450 ℃, and the concentration of the fly ash in the gas phase discharged from the incinerator can be greatly reduced by arranging the plasma high-temperature electric dust collector in the temperature region, and meanwhile, the concentrations of toxic substances such as dioxin, furan, zero-valent mercury vapor and the like adsorbed in the waste gas at the outlet of the hearth and on the surface of the fly ash are also greatly reduced, so-called toxicity of the fly ash after the incinerator is reduced. The realization is as follows: (1) the operation of the plasma high-temperature electric dust remover can greatly increase the slag discharge and solid waste amount of the incinerator, the solid waste is not dangerous waste, and the economic benefit of resource recycling can be improved; (2) the toxicity intensity and the reduction of the fly ash at the outlet of the incinerator are greatly reduced, the concentration of dioxins and furans in the fly ash after the incinerator is reduced, and the comprehensive cost of tail gas purification treatment and hazardous waste disposal is reduced; (3) the spraying amount of the activated carbon is reduced (even the spraying equipment of the activated carbon is cancelled).
The above description is only for the specific embodiment of the present invention, but the technical features of the present invention are not limited thereto, and any person skilled in the art can make changes or modifications within the scope of the present invention.
Claims (6)
1. The utility model provides a device of modified waste incineration high temperature flying dust which characterized in that: including high temperature combustion furnace (1), plasma high temperature electrostatic precipitator (3) and exhaust gas cleaner (6) that connect gradually, plasma high temperature electrostatic precipitator (3) include dust remover body (31), be equipped with a plurality of discharge electrodes (32) and gather dust board (33) in dust remover body (31), press the flue gas flow direction, discharge electrode (32) and gather dust board (33) and set up in turn, still be equipped with plasma power supply (34) on dust remover body (31), the positive pole of plasma power supply (34) links to each other with discharge electrode (32), the negative pole of plasma power supply (34) links to each other with board (33) that gathers dust.
2. The apparatus for modifying high temperature fly ash from waste incineration according to claim 1, wherein: the length directions of the discharge electrodes (32) and the dust collecting plate (33) are vertical to the flowing direction of the flue gas.
3. The apparatus for modifying high temperature fly ash from waste incineration according to claim 1, wherein: and a high-temperature flue gas heat energy recoverer (2) is also connected between the high-temperature combustion furnace (1) and the plasma high-temperature electric dust remover (3).
4. The apparatus for modifying high temperature fly ash from waste incineration according to claim 1, wherein: and a medium-temperature flue gas heat energy recoverer (4) is also connected between the plasma high-temperature electric dust remover (3) and the waste gas purifier (6).
5. The apparatus for modifying high temperature fly ash from waste incineration of claim 4, wherein: an active carbon ejector (5) is arranged between the medium temperature flue gas heat energy recoverer (4) and the waste gas purifier (6).
6. The apparatus for modifying high temperature fly ash from waste incineration according to claim 1, wherein: the inlet flue gas temperature of the plasma high-temperature electric dust collector (3) is 300-650 ℃.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921525893.6U CN210568466U (en) | 2019-09-12 | 2019-09-12 | Device for modifying high-temperature fly ash generated in waste incineration |
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| CN201921525893.6U CN210568466U (en) | 2019-09-12 | 2019-09-12 | Device for modifying high-temperature fly ash generated in waste incineration |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112402888A (en) * | 2020-11-19 | 2021-02-26 | 浙江富春江环保热电股份有限公司 | Waste incineration fly ash attenuation device and corresponding method |
| CN115624961A (en) * | 2022-10-24 | 2023-01-20 | 苏州市吴中区固体废弃物处理有限公司 | Recycling treatment method for utilizing household garbage incineration fly ash |
-
2019
- 2019-09-12 CN CN201921525893.6U patent/CN210568466U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112402888A (en) * | 2020-11-19 | 2021-02-26 | 浙江富春江环保热电股份有限公司 | Waste incineration fly ash attenuation device and corresponding method |
| CN112402888B (en) * | 2020-11-19 | 2024-03-05 | 浙江富春江环保热电股份有限公司 | Device and corresponding method for attenuating waste incineration fly ash |
| CN115624961A (en) * | 2022-10-24 | 2023-01-20 | 苏州市吴中区固体废弃物处理有限公司 | Recycling treatment method for utilizing household garbage incineration fly ash |
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