Inclined tower plate type coupled fluidized bed pyrolysis gasification device

Abstract

The invention provides an inclined tower plate type coupled fluidized bed pyrolysis gasification device which comprises a feed port, a gasification agent inlet, a reaction section shell, an inclined tower plate, an expansion section shell, a gas distribution plate, a gas outlet, a cyclone separator, a return inlet and an ash residue discharge pipe. Coal particles enter the device from the feed port and are fractionally separated by the downstream of the inclined tower plate, the coal particles and gasification agents inputted from the gasification agent inlet are subjected to pyrolysis gasification reaction at high temperature, gas carrying part of fly ash and fine semi-coke particles is outputted and further treated by the cyclone separator to obtain a purified gas product, the separated ash enters the expansion section shell through the return inlet, and final ash residues are discharged by the ash residue discharge pipe. The device is provided with an entrained-flow bed and a circulating fluidized bed, fractional pyrolysis and gasification of coal are effectively realized by different bed layers, the whole process is performed in a closed environment, and the problems of diffusion of undesirable odor and pollution to ambient environments are avoided.

Description

technical field [0001] The invention relates to the field of coal upgrading, in particular to an inclined tray type coupled fluidized bed pyrolysis gasification device. Background technique [0002] my country has very rich coal resources, the geological reserves are about 1.4 trillion tons, and the proven reserves are about 642.6 billion tons, of which the exploitable reserves are 230.3 billion tons. However, most of the coal is of low quality, and direct combustion will produce a large amount of CO 2 , SO x , NO x How to make full use of these low-quality coal to alleviate the energy pressure in our country is very necessary. At the same time, the proportion of low-rank coal in my country's coal resources is relatively high, exceeding 50% of the country's total coal reserves. These coals have the characteristics of high moisture content, high volatile content, and good chemical reactivity. Therefore, whether the processing of low-rank coal can be solved is an important ...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem of low coal pyrolysis efficiency in the prior art, the present invention provides an inclined tray type coupled fluidized bed pyrolysis gasification device, which is equipped with two parts: an entrained flow bed and a circulating fluidized bed. The plate-type grading separator allows the entrained semi-coke to enter different beds according to different particle sizes, effectively realizing the grading pyrolysis and gasification of coal

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