System for increasing garbage incinerator steam temperature through percolate marsh gas

Abstract

The invention provides a system for increasing the garbage incinerator steam temperature through percolate marsh gas. The marsh gas generated by percolate is reasonably utilized, the utilization rateof the marsh gas is increased, the situation that the marsh gas is sprayed into an incinerator to incinerate, and the local high temperature is caused is avoided, and safety influences on boiler equipment due to the flammable and combustible characters of the marsh gas are avoided as well. The high-temperature smoke generated due to marsh gas incineration is used for heating overheat steam of thegarbage incinerator, garbage incineration power plant steam parameters are further improved, and efficient power generation is achieved. Components of smoke generated through marsh gas incineration are simple, the situation of high-temperature corrosion is avoided, and equipment cost and expense increasing caused for improving steam parameters of a conventional garbage incinerator is reduced; andwaste heat of the high-temperature smoke generated due to marsh gas combustion is utilized for heating primary air, the problem about low-temperature corrosion of an air preheater is solved, meanwhile, the steam turbine steam extraction volume, for heating the primary air, of a garbage incineration waste heat boiler is reduced, and the steam volume for power generation is increased.

Description

technical field [0001] The invention relates to garbage treatment technology, in particular to a system for increasing the steam temperature of a garbage incinerator by using leachate biogas. Background technique [0002] With the improvement of people's living standards in our country, the output of domestic waste has increased significantly, and the corresponding number of waste incineration power plants has also increased day by day. At present, among the waste incineration plants that have been built or are under construction in China, the steam parameters of most waste incineration plants are medium temperature and medium pressure parameters, and a small number of waste incineration power plants use medium temperature and high pressure parameters, and increasing the steam parameters can effectively improve Power generation efficiency of waste incineration power plants. [0003] However, due to the complexity and diversity of waste types in my country, the composition o...

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Problems solved by technology

[0003] However, due to the complexity and diversity of waste types in my country, the composition of the flue gas produced by waste incineration is complex, and it is easy to cause high-temperature corrosion to waste heat utilization equipment such as water walls and superheaters, which is the main reason for limiting the increase in steam parameters; Gas preheats the combustion-supporting air, which is easy to cause low-temperature corrosion to the air preheater, forcing waste incineration power plants to use external steam-air preheaters, and use steam turbine extraction to heat the primary air, which increases equipment costs and reduces steam volume for power generation

At the same time, the fermentation of garbage produces a large amount of leachate, and the large amount of biogas produced by this leachate is directly sent to the garbage incinerator for incineration, and the utilization rate is low

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