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System and method for restraining generation of dioxins in the process of reducing temperature of exhaust gas caused by incinerating garbage

A technology of waste incineration and cooling process, which is applied in the system field of inhibiting dioxin generation, and can solve problems such as complex process, increased wear and high cost of incineration system

Inactive Publication Date: 2010-07-07
BEIJING CHINA SCI GENERAL ENERGY & ENVIRONMENT CO LTD
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Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a system and method for inhibiting the formation of dioxins in the process of cooling the flue gas after garbage incineration. Based on the system and method, it is possible to avoid the use of adsorbents, The solution of covering agent or additive causes defects such as high cost of incineration system, increased wear and complicated process

Method used

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  • System and method for restraining generation of dioxins in the process of reducing temperature of exhaust gas caused by incinerating garbage
  • System and method for restraining generation of dioxins in the process of reducing temperature of exhaust gas caused by incinerating garbage
  • System and method for restraining generation of dioxins in the process of reducing temperature of exhaust gas caused by incinerating garbage

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example 1

[0043] Reference image 3 , image 3 It is a schematic structural diagram of another embodiment of a system for suppressing the generation of dioxin during the cooling process of flue gas after incineration of waste according to the present invention.

[0044] Such as image 3 A garbage incineration system shown includes a hearth of a garbage incinerator, a second separator arranged at the outlet of the hearth, and the second separator is a high-temperature cyclone separator 6, a convection flue, and a high-temperature cyclone separator 6. The communicating low-temperature superheater 11 and the lower-level convection flue located thereafter. Among them, the furnace 1 is provided with a combustion chamber 4 and a water wall 15, the furnace wall is provided with a garbage feed port 2 and an auxiliary fuel feed port 3, an air distribution plate 17 is provided in the lower part of the furnace, and a secondary tuyere 5 is provided in the middle and lower part of the furnace. 1 The re...

example 2

[0052] Reference Figure 4 , Figure 4 It is a schematic structural diagram of another embodiment of a system for suppressing the generation of dioxin during the cooling process of flue gas after incineration of waste according to the present invention. The system includes: a grate furnace 401, a second separating device 402, a warming device 403, a first separating device 404, an additive adding device 405, and a subsequent processing device 406.

[0053] Wherein, the second separation device is a high-temperature gas-solid separation device. The flue gas including fly ash generated in the grate furnace 401 enters the high-temperature gas-solid separation device through a convection flue, and large particles of fly ash are separated and enter the ash The system is discharged. Another preferred way is to return to the grate furnace (not shown in the figure) through the material return device as in Example 1, and furthermore, the residual carbon that has not been completely burned ...

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Abstract

The invention provides a system for restraining the generation of dioxins in the process of reducing the temperature of exhaust gas caused by incinerating garbage, which comprises an incinerator, a temperature reducing device and a first separation device, wherein the incinerator the temperature reducing device and the first separation device are connected with each other in sequence; the temperature reducing device is used for partially reclaiming heat energy and reducing the temperature of exhaust gas such as fly ash caused by incinerating the garbage to be 400-800 DEG C; and the first separation device is used for removing chloride, organic chloride, heavy metal grains and transition metal cations taken as catalyst from the fly ash in the exhaust gas processed by the temperature-reducing device. The system does not need any additive, only needs a physical dusting method to restrain or reduce the generation of the dioxins, and avoids the defects of a garbage incinerating system such as high cost, complex technology, and the like as the generation of the dioxins is solved with adsorbent, covering agent, additive and the like.

Description

Technical field [0001] The invention relates to the field of control of pollution caused by garbage incineration, and in particular to a system and method for inhibiting the generation of dioxin during the process of flue gas cooling after garbage incineration. Background technique [0002] Urban household garbage is an accompanying product of human activities. With the increase of urban population and the improvement of urban living standards, the output of urban domestic waste is increasing. The increasing amount of urban domestic waste seriously pollutes the living environment of human beings. How to realize the "three modernizations" of the harmlessness, volume reduction and resource utilization of municipal solid waste has become the focus of worldwide attention. Among the common garbage treatment methods, garbage incineration has become the mainstream of municipal solid waste treatment due to the advantages of thorough harmless treatment of garbage, deep volume reduction ...

Claims

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Application Information

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IPC IPC(8): B01D53/70F23G5/44F23J15/00
Inventor 赵建强鲁光明潘忠刚姜鸿安栗明金坚辛博
Owner BEIJING CHINA SCI GENERAL ENERGY & ENVIRONMENT CO LTD
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