Pyrolysis treatment method for garbage incineration fly ash
A technology of waste incineration fly ash and treatment method, applied in the direction of combustion method, incinerator, combustion type, etc., can solve the problems of high cost, secondary pollution, occupation of land, etc.
Inactive Publication Date: 2016-06-15
ZHEJIANG CONSTR INVESTMENT ENVIRONMENTAL PROTECTION ENG CO LTD
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Problems solved by technology
At present, the main way to deal with garbage fly ash in my country is to carry out chemical treatment and landfill. Chemical treatment plus landfill is not only expensive, occupies land, but may also cause secondary pollution.
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[0009] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0010] In the example, the present invention adopts such as figure 1 In the electric heating pyrolysis furnace shown, the waste incineration fly ash pyrolysis treatment method is as follows:
[0011] 1) Open the rear end cover on the right side of the inner drum 1 of the pyrolysis furnace, put the lump moso bamboo and the fly ash after garbage incineration into the inner drum, the weight of the moso bamboo is 2.5% of the weight of the fly ash, and cover the rear end cover Tighten the nuts to seal the cover, connect the gas inlet on the left front end cover to the nitrogen tank 4 to feed nitrogen, discharge the oxygen in the inner drum, then remove the nitrogen tank 4, and seal the gas inlet;
[0012] 2) Start the rotating device, the sprocket 6 drives the inner drum to rotate at a speed of 6 rpm, and at the same time turn on the fan 3, use the pressure...
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The invention discloses a pyrolysis treatment method for garbage incineration fly ash. A pyrolysis device provided with a pyrolysis furnace, a fan, a nitrogen cylinder and a flue is adopted, wherein the inner rotary drum of the pyrolysis furnace is driven to rotate by a chain wheel; a gas inlet is formed in the front end cover of the inner rotary drum; and a gas hole is formed in the rear end cover of the inner rotary drum and is connected with the fan. The treatment method comprises the following steps that fly ash generated after incineration of moso bamboo and garbage is stuffed into the inner rotary drum, and nitrogen is introduced in to exhaust oxygen in the inner rotary drum; the inner rotary drum is driven to rotate by the chain wheel; meanwhile, pressure in the rotary drum is adjusted to minus 50 Pa by utilizing the fan; the pyrolysis furnace is heated at a rate of 150 DEG C / h; temperature of the inner rotary drum reaches 500-600 DGE C, and heat preservation is performed for 1 hour; and then the inner rotary drum is naturally cooled to room temperature. By adopting the method disclosed by the invention, the fly ash generated by incineration of garbage is pyrolyzed, so that dioxin is removed from the fly ash, and the leaching rate of heavy metal can be greatly lowered.
Description
technical field [0001] The invention relates to a pyrolysis treatment method for waste incineration fly ash. Background technique [0002] At present, most of the garbage at home and abroad is treated by incineration to generate electricity, but the fly ash produced after garbage incineration contains "dioxin" and a large amount of heavy metal oxides in it, which has a high leaching rate and pollutes the environment. "Hazardous waste". According to the experience of Germany, the dioxins in the fly ash removed from the incineration of garbage must be eliminated by pyrolysis treatment, and the addition of certain materials in the pyrolysis treatment can reduce the leaching rate of heavy metals by more than 80%, but the added materials Confidential, its pyrolysis treatment device is composed of pyrolysis furnace, fan, nitrogen tank and flue. At present, the main way to deal with fly ash in my country is to carry out chemical treatment and landfill. Chemical treatment plus lan...
Claims
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IPC IPC(8): F23G5/00F23G5/027F23G5/44
CPCF23G5/00F23G5/027F23G5/44
Inventor 王雍火陈银康
Owner ZHEJIANG CONSTR INVESTMENT ENVIRONMENTAL PROTECTION ENG CO LTD