Method for integrative sorting and destructive distillation pyrolysis and gasification of household refuse without discharge of dioxin

Abstract

The invention provides a method for integrative sorting and destructive distillation pyrolysis and gasification of household refuse without discharge of dioxin. According to the method, an automatic garbage integrative sorting system, a feeding charging system, a destructive distillation pyrolysis and gasification furnace system, an exhaust gas purifying device, an ash removing device and a combustible gas power generation system are used in the method; problems in treatment of household refuse are thoroughly overcome, for example, generation of dioxin is avoided and pollution of waste water, exhaust gas and waste residues is reduced; plastic garbage in hybrid municipal solid waste is sorted out for preparation of plastic particles by using the automatic garbage integrative sorting system; after drying, rest garbage is converted into combustible gas and is used to prepare the renewable resource tar through integrative treatment of destructive distillation pyrolysis and gasification, waste residues are used for brick making, waste water is recycled after treatment, and exhaust gas is purified and discharged after the exhaust gas reaches the standard. When the method provided by the invention is used for treating garbage, generation and harm of dioxin are avoided, no waste water, waste residues and wastes are discharged, harmlessness and full resource utilization are realized in reality, and recycling economy of treating wastes with wastes and turning the waste into the valuable is achieved.

Description

Technical field: [0001] The invention belongs to the automatic comprehensive sorting and classification system of urban living garbage in the field of energy saving and environmental protection, and the garbage carbonization pyrolysis gasification into combustible gas, and the comprehensive treatment and utilization method of garbage, and specifically relates to a garbage carbonization pyrolysis without dioxin emissions Gasification equipment system. Background technique: [0002] At present, there is no good solution for the mixed domestic waste treatment both at home and abroad. At present, there are three methods commonly used in domestic garbage disposal in cities all over the country: one is sanitary landfill method; the other is incineration and incineration power generation method; the third is composting fermentation method. The problems and deficiencies are as follows: [0003] 1. Sanitary landfill method; currently the most used garbage disposal method, this meth...

AI Technical Summary

Problems solved by technology

[0004] (1) Large area, short use time (generally ten years), long land occupation time (cannot be reused within 100 years)

[0005] (2) Odor and poisonous gas generated around the landfill, bacteria, viruses, sources of disease transmission of mosquitoes and flies, and carcinogens, seriously endangering the health of ordinary people

[0006] (3) The garbage after landfill causes serious pollution to the soil, groundwater and atmosphere, and its potential hazards are constantly increasing

[0007] (4) Garbage landfills cause a serious waste of resources

[0008] (5) There is a large amount of sewage overflowing every day, which requires manpower and material resources to deal with, and it will take 20 years of long-term maintenance and treatment. How much will be paid for the treatment of seepage sewage every year? The environmental impact on the future is difficult to estimate

[0011] (1) First look at its reduction. On the surface, it seems that waste incineration has reduced by 50% to 60%, but in fact the remaining 40% to 50% of the slag still needs to be reprocessed, and it still takes up a lot of landfill. land, groundwater and soil polluted by heavy metals

[0012] (2) Let’s look at resource utilization again, we don’t need to talk about direct incineration, because this method has not achieved resource utilization at all, let alone industrialization, but has seriously wasted recyclable resources

[0013] (3) The method of waste incineration to generate electricity. This technology comes from abroad and is mature. However, after being introduced into our country, many places have to go to landfill because of the high operating costs and the government's financial inability to afford it.

The main reason is that the garbage in our country has complex components, low calorific value, and high moisture, so that the garbage incinerator cannot work normally.

Then if you want to work normally, you must add coal or inject oil, which increases the operating cost, makes the input far exceed the output, and runs at a loss

[0014] (4) During the incineration process of garbage, the odor, poisonous gas, dioxin, and mercury vapor in the battery released will seriously pollute the atmosphere again, and such toxic gases cannot be processed, and the operating costs are very expensive. In line with our country's national conditions

[0016] (1) The composting of organic matter takes a long time, usually three weeks to one month, and the accumulation of pollution is serious, and flies and mosquitoes breed, seriously polluting the surrounding environment and bringing great hidden dangers to local sanitation and epidemic prevention

[0017] (2) The degradation of organic matter is not complete, the treatment is not sufficient, and the residue will still cause garbage pollution

[0018] (3) There are many impurities in organic compost products, and the harmful substances of heavy metals cannot be effectively separated. Long-term use of compost products will cause soil surface deposition, damage soil, and endanger crops

[0019] (4) The biogas produced in the composting process can be used, most of the nitrogen-containing nutrients are naturally released, and the phosphorus and potassium substances are naturally degraded, so the quality of the fertilizer is low, and the majority of farmers are unwilling to use it. Harmless and resourceful treatment, not to mention industrialization

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