Resource treatment method for household garbage and biochemical sludge

Abstract

The invention discloses a resource treatment method for household garbage and biochemical sludge. The resource treatment method for the household garbage and the biochemical sludge is characterized by comprising garbage sorting, sludge drying, low-temperature dry distilling, melting and burning, oil and gas separating and purifying and flue gas treating processes and comprising the following specific steps: (1) sending the household garbage to the garbage sorting process and sorting out useful fuel, and sending the biochemical sludge to the sludge drying process to obtain the dried sludge; (2) sending the useful fuel and the dried sludge to a low-temperature dry distilling process to obtain dry-distilled oily gas and dry-distilled residues; (3) sending the dry-distilled oily gas and the dry-distilled residues to the oil and gas separating and purifying, and melting and burning processes, separating out tar and glassy solid residues; and (4) treating flue gas generated in the melting and burning process by the flue gas treating process, and discharging the flue gas into upper air. The problem that dioxin is generated when the garbage and the sludge are burned can be solved easily; resource utilization of the household garbage and the biochemical sludge is facilitated; the garbage sorting difficulty is reduced; and the resource treatment method for the household garbage and the biochemical sludge is convenient in industrial application.

Description

technical field [0001] The invention belongs to a method for processing domestic garbage and biochemical sludge, and in particular relates to a resource treatment method for domestic garbage and biochemical sludge. Background technique [0002] With the growth of population, the progress of urbanization and the expansion of city scale, the amount of urban waste generated in my country is also increasing day by day, which not only seriously endangers the environment, but also occupies a large amount of land resources, and some cities even cause the situation of garbage siege. According to the statistics of 668 cities across the country, the domestic garbage produced in one year has reached 150 million tons, and the per capita garbage production is about 450-500kg, and it is still increasing at an annual growth rate of 8%-9%. After being properly compressed, domestic waste has a density of about 0.8t / m3, so 150 million tons of domestic waste is equivalent to 187.5 million cubi...

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Problems solved by technology

[0010] Japanese patents with patent numbers JP2001187406, JP2001323280, JP2001139952, JP2001123180, and JP2002012876 disclose a series of technologies for using coke ovens to treat waste plastics and mixing waste plastics with coal for coking, but the series of methods involve extracting waste plastics from municipal solid waste When plastics are used as raw materials for co-coking of coke ovens and coal, they must go through a very strict and complicated sorting and processing process. In the end, only waste plastics in garbage can be used as raw materials, so they are not suitable for large-scale applications.

[0011] The Chinese patent with the patent publication number of CN1465655A discloses a high-temperature dry distillation treatment method for municipal solid waste. The high-temperature dry distillation treatment of organic light components in domestic waste is realized by using traditional coking equipment, tar recovery equipment and dry distillation oil gas purification and recovery equipment. The method needs to be mixed with a certain proportion of coal, so there are limitations in industrial application

[0012] The Chinese patent No. 200510085232.2 discloses a high-temperature dry distillation garbage incinerator and its incineration process. Household garbage is loaded into an incineration vehicle, and then the incinerator vehicle enters the drying area, dry distillation combustion area and embers respectively on the closed track. However, due to the complex composition and high water content of waste in my country, the quality of carbides produced by this technology is not good, and a certain amount of fuel needs to be supplemented, so there are certain problems in industrial application.

[0013] The Chinese patent with the patent publication number of CN102061181A discloses a non-incineration low-temperature dry distillation garbage carbonization furnace and its neutralization utilization technology, which directly enters the garbage into the carbonization furnace with an inclined furnace body for dry distillation. , the industrial application of this technology will also face a series of problems

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