Method for treating waste salt by adopting self-propagating pyrolysis method
A self-propagating, pyrolysis technology, applied in chemical instruments and methods, solid waste removal, transportation and packaging, etc., can solve the problems of environmental impact and high disposal cost, achieve low energy consumption, low treatment cost, and realize resource The effect of chemical utilization
Pending Publication Date: 2022-07-22
CHONGQING ANGRUIYUE SCI & TECH
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Problems solved by technology
[0004] When producing waste salt, various enterprises often also produce a large amount of waste salt mother liquor. The waste salt mother liquor usually contains high concentration of salt and organic matter, and the disposal cost is high. Many enterprises usually use dilution to discharge in order to save costs. The environment has a greater impact
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[0020] The present invention will be described in detail below with reference to the accompanying drawings.
[0021] see figure 1 , the method for treating waste salt by self-propagating pyrolysis method, which comprises the following steps:
[0022] Step 1, the waste salt in the waste salt storage bin 1 and the chaff husk in the auxiliary material storage bin 3, that is, biomass fuel, are fed to the metering belt 4 and transported to the mixing assembly 5 to mix evenly, and the production in the mother liquor storage tank 2 is mixed. The mother liquor of the waste salt is sprayed to the surface layer of the mixed material by the metering pump to obtain the mixed waste salt, and the moisture content of the mixed waste salt is adjusted to 10%. The mixed waste salt includes 60% waste salt, 10% biomass fuel and 30% waste salt-producing mother liquor by weight percentage.
[0023] In step 2, the residue with a particle size of 5-10 mm in the bottom material storage bin 9 is tran...
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The invention discloses a method for treating waste salt by adopting a self-propagating pyrolysis method, which comprises the following steps: step 1, mixing waste salt, biomass fuel and mother liquor for generating the waste salt to obtain mixed waste salt, and adjusting the water content of the mixed waste salt to be 1-40%; 2, laying the mixed waste salt in a self-propagating pyrolysis device to form a material layer, and incinerating organic matters in the material layer into gas compounds through self-propagating pyrolysis; 3, the pyrolyzed material layer passes through a cooling section of a self-propagating pyrolysis device, and after being cooled, the material layer is crushed and screened to obtain residues meeting the particle size requirement; and 4, refining and purifying the residues to obtain regenerated salt. Organic impurities in the waste liquid and the mother liquid generating waste salt can be removed at the same time, and resource utilization is achieved.
Description
technical field [0001] The invention relates to the technical field of solid waste treatment, in particular to a method for treating waste salt by adopting a self-propagating pyrolysis method. Background technique [0002] With the development of my country's industrialization and urbanization, the continuous economic growth has also brought serious environmental problems. The coal chemical, petrochemical, pharmaceutical and other chemical industries produce about 20 million tons of industrial waste salt each year, and it is expected that by the end of the "14th Five-Year Plan", the output of chemical by-product salt will exceed 40 million tons. Industrial waste salt has the characteristics of wide source, complex composition and high toxicity. It is usually required to enter rigid landfill as hazardous waste for disposal. At present, the landfill cost of industrial waste salt is as high as 3000-4000 yuan / ton; subject to cost and technology The reason is that the waste salt...
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IPC IPC(8): B09B3/00B09B3/38B09B3/40
CPCB09B3/00
Inventor 李一彭扬罗建军葛林
Owner CHONGQING ANGRUIYUE SCI & TECH