Internal dust removal type pyrolysis and gasification device and method for organic solid fuel

Abstract

The invention provides an internal dust removal type pyrolysis and gasification device and method for organic solid fuel. The device comprises a reacting furnace, ceramic membrane tubes, a burner, a heat exchanging device, a condensing device, a gas storage tank, a reverse blowing pipeline and a temperature control device. One or more sets of the ceramic membrane tubes are fixed at the top end of the reacting furnace, after exhaust gas produced through pyrolysis or gasification or combustion of the organic solid fuel in the reacting furnace penetrates through the ceramic membrane tubes, gas-solid separation is achieved, the gas is exhausted out of the reacting furnace through a produced gas outlet, and small solid particles in the exhaust gas are blocked on the surface layers of the ceramic membrane tubes by the ceramic membrane tubes or fall into an ash hopper. The produced gas is stored in the gas storage tank after being cooled through the heat exchanging device and the condensing device, and the oil obtained through condensation is gathered into an oil gathering bottle. The gas stored in the gas storage tank can serve as the reverse blowing gas of the ceramic membrane tubes and also serve as the combustion-supporting gas for the pyrolysis and the gasification of the organic solid fuel of the reacting furnace. By means of the method, the energy utilization of the pyrolysis and the gasification of the organic solid fuel is further improved, pollution of fly ash to surroundings is reduced, and the effects of energy conservation and emission reduction are achieved.

Description

technical field [0001] The invention belongs to the technical field of methods for fly ash removal, gas reforming and recycled gas recycling, and specifically relates to a device and method for dust removal, gas reforming and recycled gas recycling built in a ceramic membrane tube. In particular, it involves the thermochemical transformation of organic fuels including coal, biomass, general waste, industrial organic waste, waste plastics, waste rubber, garbage-derived fuels and other solid combustibles in pyrolysis and gasification devices. The fly ash is removed, the crude combustible gas is reformed, and the method and device for recycling the recovered gas. Background technique [0002] Organic solid waste has a huge output and abundant reserves, which is of great significance to its energy recovery and reuse. Thermochemical conversion technologies such as incineration, pyrolysis and gasification are one of the effective methods for treating organic solid waste. Pyrolys...

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Problems solved by technology

[0003] However, there are many problems in the thermochemical conversion process of organic solid waste, such as pyrolysis and gasification, which are mainly manifested in the problems of impure combustible gas, large amount of fly ash, and low calorific value.

Fly ash is a tiny ash particle discharged during the fuel combustion process. Its particle size is generally between 0.5 and 100 μm. It is easy to combine with water, tar and carbon black to form solid sticky or lumpy matter, which is used for process equipment, internal combustion engines and steam turbines. The operation will bring serious problems, and a large amount of air will also cause serious air pollution; the low calorific value of gas will reduce the high-value utilization of gas, and it cannot be used as fuel for industrial production, steam turbines, internal combustion engines and other equipment on a large scale

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