Method for cycle power generation by carrying out wet decomposition pretreatment, dry distillation and gasification on domestic garbage

Abstract

The invention discloses a method for cycle power generation by treating garbage, which is rapid, residue-free, clean and innoxious and in particular can effectively prevent dioxins from synthesis. In the method, after being subjected to wet decomposition, dechlorination, debenzolization, dehydration, deodorization, sterilization and organic matter expansion, the domestic garbage is pyrolyzed by afurnace for pyrolysis, dry distillation and gasification, and the hydrogen-containing biomass gas generated after pyrolysis, cooling and purification is used for power generation by adopting gas turbine-steam turbine hybrid power generation technology. The invention has the following advantages: the domestic garbage is fully treated, no secondary pollution is produced in the treatment process, source control is carried out on synthesis of such toxic substances as dioxins and the like, and the power is the clean energy in the true sense; therefore, the method can completely replace the incinerator-steam turbine power generation technology which is largely adopted at present.

Description

technical field [0001] The invention relates to a method for comprehensively treating municipal solid waste and using it for power generation, more specifically a method for finally decomposing the waste to generate a large amount of hydrogen-containing biomass gas, and using gas turbine-steam turbine combined power generation technology to generate electricity. Background technique [0002] At present, the most common way to deal with garbage in various countries is incineration. Generally, the temperature in the garbage incinerator is controlled at about 980 ℃, and the volume after incineration can be reduced by 50-80% compared with the original. The combustible garbage collected by classification can even be reduced by 90% after incineration. %. However, after hundreds of years of practice, the waste incineration method has not been accepted by the general public. Today's best incineration equipment will release dozens of harmful substances under normal operation, and it...

AI Technical Summary

Problems solved by technology

However, after hundreds of years of practice, the waste incineration method has not been accepted by the general public. Its disadvantages are highlighted in its latent pollution, expensive cost, complicated operation and waste of resources.

Today's best incineration equipment, under normal operation, will release dozens of harmful substances, and it is difficult to purify them all only by filtration, water washing and adsorption

In particular, furan pollutants such as dioxins are recognized as first-class carcinogens, and even a very small amount can accumulate in the body for a long time. Its effect on the human body has not been regulated so far.

Moreover, it costs 1 billion yuan to build a large and medium-sized incinerator, and the processing cost after it is completed and put into operation is about 300 yuan / ton, which is unbearable for ordinary cities.

It is precisely because of the two major disadvantages of dioxin pollution risk and high investment and operation costs that waste incineration has experienced a climax in the 1980s, and waste incineration plants in developed countries around the world are currently shutting down.

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