Energy utilization method for household garbage

Abstract

The invention relate to an energy utilization method for household garbage. The method comprises the following steps of: carrying out crushing, separating, dehydrating, burning and the like on the household garbage in a continuous manner, simultaneously, carrying out themolysis on separated light garbage materials such as waste plastics so as to prepare fuel oil and / or fuel gas products, and carrying out purifying standardization processing and discharging on waste water discharged by a dehydrator. According to the energy utilization method for the household garbage, the carbohydrate garbage with a low heating value is sequentially subjected to crushing and dehydrating, and the heating value of the garbage can be effectively improved; the energy utilization method for the household garbage belongs to a continuous garbage processing process, and the minimization, the hazard-free treatment and the reutilization can be completely and thoroughly carried out on a mountain of the household garbage; and the energy utilization method for the household garbage has good creativity, novelty and industrial applicability.

Description

technical field [0001] The invention relates to a method for energy utilization of domestic garbage; specifically, it belongs to a method for preparing fuel (fuel oil and / or gas) from domestic garbage as a raw material, and belongs to the field of environmental protection petrochemical technology; Background technique [0002] With the continuous improvement of people's living standards, the content of organic waste in domestic waste continues to rise, and carbohydrates or biomass in organic waste (such as melon and fruit peels, vegetable residues, leftovers after meals, etc.) are perishable and rotten. Affect people's living environment; scientifically and effectively make it harmless and reduce it, especially the high-value resource utilization of domestic waste has attracted the attention of the whole society; The rate is generally 22-33%, and the power generation of 1 ton of domestic waste is about 280 degrees (KWH), and the utilization rate of resources is low, resultin...

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Problems solved by technology

[0003] According to the national standard "GB / T13612-2006" of the national standard "GB / T13612-2006" for the gas produced by industrial enterprises to transport the urban gas pipeline network to users as residents, the calorific value of the gas is greater than 14MJ / nm 3 , or 3349 kcal / nm 3 ; On July 1, 2001, my country promulgated and implemented the national standard GB18047-2000 for compressed natural gas for vehicles. The high-level calorific value of gas stipulated in this standard must be greater than 31.4MJ / m 3 (or 7512 kcal / m 3 , under the standard state), there have been reports on the method of using domestic waste as raw material to produce gas through thermochemical conversion technology; "A comprehensive treatment and utilization method for effectively containing dioxins" was disclosed in ZL201120082883.7 , which belongs to a "gasification-incineration" technology for domestic waste treatment, using air and water vapor as gasification agents, and the gas product after heat treatment contains 40-50% (V%) nitrogen, and some H 2 , CO and other gas components with low calorific value, which cannot reach the 3349 kcal / Nm required by urban household gas furnaces 3 The gas has the lowest calorific value, and the gas products can only be used as fuel for combustion furnaces or bricks. The commercial use value is low, and the resource utilization of high-value domestic waste cannot be better implemented; In the method for producing engine gas from substances and / or organic wastes, liquefied petroleum gas with high calorific value and gas product with low calorific value are used for blending and blending, so that the calorific value of the gas product can reach ≥31.4MJ / Nm 3. Engine gas standards, when using 100% domestic waste as raw material, the calorific value of gas products can not reach ≥ 14MJ / m 3 , or 3349 kcal / m 3. Defects in the gas calorific value of the urban gas pipeline network;

[0004] So far, in Chinese and world patent literature databases, related books, publications, magazines, and industrial production applications, there is no reference to using domestic waste as raw material to produce high-calorific gas (≥14MJ / m 3 ) report; because domestic waste contains a large amount of biomass and carbohydrates with low calorific value, the gas product after heat treatment contains a large amount of H2 and CO gas with low calorific value, so that the calorific value of the gas product is low and cannot reach The calorific value quality standard of gas from the urban gas pipeline network or domestic gas stoves can only be used as fuel for cheap industrial combustion furnaces, and has the disadvantage of low commercial value for resource utilization of domestic waste treatment;

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