Method for treating incineration fly ash by using plasma fluidized bed

A technology of plasma and incineration of fly ash, which is applied in the direction of protective devices against harmful chemicals, etc., can solve the problems of high equipment investment and operating costs, heavy metal and persistent organic pollution, etc., and achieves simple structure, convenient operation and good effect Effect

Inactive Publication Date: 2015-05-20
SUN YAT SEN UNIV
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Problems solved by technology

Only heat treatment technology can fundamentally solve the problem of heavy metal and persistent organic matter pollution

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  • Method for treating incineration fly ash by using plasma fluidized bed

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Embodiment Construction

[0010] as attached figure 1 As shown, the plasma device of the present invention comprises a plasma fluidized bed 1 and a high-voltage power supply 2; Shaped stainless steel mesh 8, incineration fly ash 9, quartz cover 10 and exhaust port 11; Shaped stainless steel electrodes 6 are symmetrically fixed on the tetrafluoroethylene base 5, and are connected to the high voltage power supply 3 through high-voltage wires, the air inlet 3 is placed at the center of the tetrafluoroethylene base 5; the conical stainless steel mesh 8 is placed on the central axis of the top of the quartz container 4 and fixed directly above the electrode 6, the incineration fly ash 9 to be treated is placed in the conical stainless steel mesh 8.

[0011] The incineration fly ash was taken from the bag filter of a grate furnace domestic waste incineration plant in China. 1) Put 15g of incineration fly ash to be treated into a 300-mesh conical stainless steel mesh; 2) introduce 201 / min air-carrying 3) St...

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Abstract

The invention relates to a method for treating incineration fly ash by using a plasma fluidized bed. The method comprises the following steps: putting incineration fly ash to be treated into a plasma device which comprises the plasma fluidized bed and a high-voltage power supply; introducing carrier gas through a gas inlet; starting the high-voltage power supply; and forming disruptive discharge in a minimum-distance part between electrodes by virtue of knife-shaped stainless steel electrodes in the presence of high-voltage power, driving the disruptive discharge to quickly slide downstream along the surfaces of the electrodes by the carrier gas to form non-thermal arc plasma, converting the carrier gas into active gas containing a large quantity of charged particles, excited species, free radicals, electrons and photons, driving the incineration fly ash in a stainless steel mesh to be in a fluidized state by the active gas passing through the conical stainless steel mesh so as to form the plasma fluidized bed, and degrading and mineralizing persistent organic pollutants in the incineration fly ash to form inorganic matter by processes of diffusing, adsorbing, migrating and chemically reacting plasma by virtue of the active gas, thereby achieving the purpose of treating the incineration fly ash.

Description

technical field [0001] The invention relates to the field of solid waste treatment, in particular to a plasma fluidized bed treatment method for incineration fly ash. Background technique [0002] With the application of solid waste incineration technology, the fly ash produced in the incineration process is rich in toxic chemicals, such as heavy metals and persistent organic substances, and is identified as hazardous waste, which needs to be harmlessly treated. At present, the commonly used incineration fly ash treatment methods include physical or chemical separation technology, solidification / stabilization technology and heat treatment technology. Only heat treatment technology can fundamentally solve the problem of heavy metal and persistent organic pollutants in incineration fly ash, but heat treatment technology, such as melting, requires high equipment investment and operating costs. Contents of the invention [0003] In order to solve the above problems, the prese...

Claims

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Application Information

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IPC IPC(8): A62D3/19A62D101/28A62D101/20
CPCA62D3/19A62D2101/08A62D2101/28
Inventor 杜长明
Owner SUN YAT SEN UNIV
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