Two-step pyrolysis and gasification furnace for recycling domestic garbage

Abstract

The invention discloses a two-step pyrolysis and gasification furnace for recycling domestic garbage. The two-step pyrolysis and gasification furnace comprises a first-stage gasification furnace, a combustion furnace and a second-stage gasification furnace; the top of the first-stage gasification furnace is provided with a furnace lid, and the lower part of the first-stage gasification furnace is provided with a first-stage fire grate below which a first-stage ash hopper chamber is arranged; the lower part inside the second-stage gasification furnace is provided with a second-stage fire grate below which a second-stage ash hopper chamber is arranged, a second-stage ash outlet is formed in the second-stage ash hopper chamber, and the top of the second-stage gasification furnace is connected with a combustion chamber of the combustion furnace by a mixed flue gas pipe; the mixed flue gas pipe is connected with the upper part of the first-stage gasification furnace by a vapor pipe; a charcoal dropping groove is formed in the first-stage fire grate and communicates with the second-stage gasification furnace located above the second-stage fire grate; the top of the combustion furnace is connected with a smoke exhaust fan by a flue gas pipe; the combustion furnace is also connected with an oxygen fan by a combustion furnace oxygen inlet pipe, and the oxygen fan communicates with the second-stage ash hopper chamber by an oxygen inlet pipe; and the flue gas pipe is connected with an induced draft fan by a hot air inlet pipe, and the induced draft fan is connected with the first-stage ash hopper chamber by a hot air outlet pipe.

Description

technical field [0001] The invention relates to the technical field of domestic waste treatment devices, in particular to a domestic waste pyrolysis gasification furnace with a two-step process for recycling domestic waste. Background technique [0002] There are basically three ways to dispose of domestic waste: landfill, incineration, and composting, but no matter which technology is used, various problems will arise. Such as landfill, which occupies a large space and causes serious secondary pollution, especially to groundwater bodies; incineration technology is difficult to control the production of dioxins, which is likely to cause secondary air pollution; composting has low reduction efficiency and produces secondary pollution during the recycling process. Second pollution, the use of fertilizer produced is small, and storage is difficult. In recent years, a new treatment technology, pyrolysis technology, has been developed rapidly. It pyrolyzes garbage at a temperatu...

AI Technical Summary

Problems solved by technology

[0005] However, the most obvious disadvantages of the current pyrolysis gasifiers are: ①The exhaust temperature of the flue gas is low, generally below 100°C, and there is obvious water vapor in the chimney, which makes it impossible to realize the utilization of thermal energy resources; ②In the flue gas During the purification process, a large amount of waste water and tar are produced. If this waste cannot be effectively disposed of, it will cause secondary pollution

Images