Waste incineration fume treatment method for controlling dioxin memory effect

A technology for waste incineration and flue gas treatment, which is applied in the direction of combustion methods, gas treatment, and combustion product treatment. It can solve the problems of increasing the difficulty of dioxin control, achieve improved thermal efficiency, reduce exhaust gas emissions, and achieve remarkable results. Effect

Inactive Publication Date: 2020-05-08
HANLANLVDIAN SOLID WASTE TREATMENT (FOSHAN) CO LTD 2ND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the current technology, the emission concentration of dioxin is reduced to 0.050ngTEQ/Nm on the 28th day due to the "memory effect" of dioxin afte

Method used

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  • Waste incineration fume treatment method for controlling dioxin memory effect
  • Waste incineration fume treatment method for controlling dioxin memory effect
  • Waste incineration fume treatment method for controlling dioxin memory effect

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A waste incineration flue gas treatment method for controlling the memory effect of dioxins, comprising:

[0035] S1: Start the incinerator, and process the flue gas obtained after garbage incineration through the waste heat boiler, superheater group and economizer in order to recover the heat of the flue gas for recycling and reduce the temperature of the flue gas;

[0036] S2: Pass the flue gas obtained in S1 into the reaction tower and activated carbon mixer for flue gas treatment in sequence, and then pass it into the bag filter; 2 hours before starting the incinerator, pre-spray activated carbon on the inner surface of the bag filter with a spray volume of 80mg / m 3 ;

[0037] S3: The miscellaneous particles and fly ash in the bag filter are introduced into the ash storage, and the flue gas obtained in S2 is introduced into the chimney and discharged into the atmosphere.

Embodiment 2

[0039] A waste incineration flue gas treatment method for controlling the memory effect of dioxins, comprising:

[0040]S1: Start the incinerator, and process the flue gas obtained after garbage incineration through the waste heat boiler, superheater group and economizer in order to recover the heat of the flue gas for recycling and reduce the temperature of the flue gas;

[0041] S2: Pass the flue gas obtained in S1 into the reaction tower and activated carbon mixer for flue gas treatment in turn, and then pass it into the bag filter; 2 hours before starting the incinerator, pre-spray activated carbon on the inner surface of the bag filter with a spray volume of 150mg / m 3 ;

[0042] S3: The miscellaneous particles and fly ash in the bag filter are introduced into the ash storage, and the flue gas obtained in S2 is introduced into the chimney and discharged into the atmosphere.

Embodiment 3

[0044] S1: Pretreatment, including: before starting the incinerator, clean up the superheater group, economizer, reaction tower, bag filter, ash storage and pipelines where the waste incineration flue gas passes through, so as to ensure that the channels on the heating surface are unblocked and the pipelines are clean. No dust and slagging;

[0045] S2: Start the incinerator, and process the flue gas obtained after incinerating waste through the waste heat boiler, superheater group, and economizer in order to recover the heat of the flue gas for recycling and reduce the temperature of the flue gas;

[0046] S3: The flue gas obtained in S2 is passed into the reaction tower and activated carbon mixer for flue gas treatment, and then passed into the bag filter;

[0047] S4: The miscellaneous particles and fly ash in the bag filter are introduced into the ash storage, and the flue gas obtained in S3 is introduced into the chimney and discharged into the atmosphere.

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Abstract

The invention discloses a waste incineration fume treatment method for controlling the dioxin memory effect. The waste incineration fume treatment method comprises the steps that fly ash and other sediments with the dioxin memory effect in a device and a pipeline are removed before an incinerator is started, activated carbon is pre-sprayed into a bag-type dust collector so that a lot of dioxin generated in the incinerator starting and incineration processes can be effectively adsorbed in time, and moreover, the severe dioxin memory effect caused when the bag-type dust collector adsorbs a massive amount of dioxin because of the device itself, aging and the like in the long-time using process can be controlled. By means of the method, it can be achieved that the discharging concentration ofthe dioxin can meet the discharging standards the next day when the furnace is started, and starts tending to be stable the fourth day after the furnace is started, and the environment-friendly standard requirements are met. The method can effectively control the dioxin memory effect, the heat efficiency is high, energy conservation and environment protection are achieved, the method is simple andfeasible, and the operation is convenient.

Description

technical field [0001] The invention relates to the technical field of domestic waste incineration flue gas treatment, in particular to a waste incineration flue gas treatment process for controlling the memory effect of dioxins. Background technique [0002] With the rapid development of the economy and the improvement of people's living standards, incineration technology has become one of the municipal solid waste treatment technologies commonly used in the world. The problem of dioxin pollution generated in the process of waste incineration has attracted widespread attention from the international community. Research has become a hot issue in environmental pollution research. There are many factors that affect the formation of dioxins in the process of waste incineration, including temperature, reaction flue gas environment, oxygen content, chlorine source, catalyst, etc. At present, the control methods of dioxins in the flue gas of domestic waste incineration are mainly...

Claims

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Application Information

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IPC IPC(8): F23G7/00F23G5/44F23G5/46F23J15/02F23J15/06F23J1/00F23J3/02B01D46/02B01D46/04B01D53/04
CPCB01D46/023B01D46/04B01D53/04B01D2258/0291F23G5/44F23G5/46F23G7/00F23J1/00F23J3/02F23J15/025F23J15/06Y02E20/30
Inventor 郭光召罗国衡龚丽芳谭泳华
Owner HANLANLVDIAN SOLID WASTE TREATMENT (FOSHAN) CO LTD 2ND
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