Garbage treatment method and comprehensive utilization

Abstract

The invention discloses a method for treating waste and comprehensive utilization thereof. The method adopts a high-temperature incineration technology to greatly reduce a virulent gas in smoke gas dioxin and greatly increase the concentration of a CO2 gas; heat energy, the smoke gas and clinker produced in the incineration process can generate power and produce dry ice, rubber powder, floor tiles, organic compound fertilizer and the like after treatment, thereby realizing no emission, no pollution and no waste in the waste incineration treatment. The waste treatment method comprises the following steps: methane produced in a biochemical treatment pool is conducted to an incinerator and ignites the dry waste in the incinerator; pure oxygen produced in an air separation device is conducted to the incinerator and supports the combustion of the waste to produce the smoke gas containing high-concentration CO2; the temperature in the incinerator is up to over 1,200 DEG C; and the smoke gas is desulphurized and purified to obtain purified CO2. In the method, the smoke gas, the heat energy and the clinker produced by incinerating the waste are matched with liquid nitrogen produced by a liquefier and the air separation device to prepare CO2 liquid, the floor tiles, the rubber powder, the organic compound fertilizer and other useful resources.

Description

technical field [0001] The invention relates to the technical field of garbage treatment, in particular to a garbage treatment method and its comprehensive utilization. Background technique [0002] Garbage includes domestic waste and industrial waste. Domestic waste includes domestic waste from urban residents, domestic waste from urban street cleaning, domestic waste from urban catering industries, sludge from urban domestic wastewater treatment plants, and urban river stream cleaning. sludge, feces of urban residents, waste tires, etc. The "three modernizations" treatment of waste refers to reduction, harmlessness, and waste recycling. Apply incineration technology to send waste garbage into the incinerator, and convert the organic carbon in the garbage into CO through incineration oxidation reaction 2 , the conversion of hydrogen to H 2 O, turning waste into valuable products, and killing viruses and bacteria at high temperatures, to achieve reduction, harmlessness an...

AI Technical Summary

Problems solved by technology

However, all waste incineration power plants only use the heat energy generated by waste incineration, and the discharge or resource utilization of secondary pollutants in the process of waste incineration has not yet been resolved.

[0004] Existing waste incinerators use auxiliary fuel—diesel or coal, plus air for combustion. The combustion temperature in the furnace is only 800-1000°C. It is difficult to completely burn the garbage organic matter in the furnace, because the combustion temperature in the furnace is lower than 1200°C. When the organic matter in the garbage is not completely burned, it is easy to produce toxic and harmful gases of dioxin, which seriously pollutes the environment

The highly toxic dioxins contained in the flue gas are difficult to completely clean up. Dioxins not only pollute the air, but also pollute water sources and plants through accumulation. Eating contaminated aquatic products or fruit trees will affect human health.

Due to the use of air for combustion, a large amount of nitrogen participates in the combustion to produce nitrogen oxides, which pollutes the air and easily causes acid rain. CO in air 2 The concentration is low, it is difficult to use industrial methods to recycle

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