A spouted fluidized bed with tar catalytic cracking function

Abstract

The invention relates to a spouted fluidized bed with a tar catalytic cracking function. The spouted fluidized bed comprises a spouted fluidized bed body, wherein the bed body is provided with a gas inlet pipe and pyrolysis gas inlet ports, the spouted fluidized bed body is internally provided with a guiding pipe, a semi-coke feeding port is formed in the top end of the spouted fluidized bed body,the guiding pipe is connected in the spouted fluidized bed body through supporting rods, the spouted fluidized bed is externally connected with a spiral feeding machine, a gas-solid separator and a semi-coke collecting tank, the gas-solid separator and the semi-coke collecting tank are arranged at the two sides of the spouted fluidized bed body respectively, baffle plates are arranged at the inner wall of the spouted fluidized bed body and above the guiding pipe, and the baffle plates are arranged in a spouted area under a suspension flow section of the spouted fluidized bed body. The spoutedfluidized bed with the tar catalytic cracking function solves the problems of short time and low utilization rate of semi-coke participating in a cracking reaction in the prior art, and greatly improves the efficiency of the semi-coke participating in the reaction.

Description

technical field [0001] The invention relates to the field of clean coal utilization, in particular to a spouted fluidized bed with tar catalytic cracking function. Background technique [0002] In recent years, flue gas desulfurization using powdered activated coke prepared in situ from pulverized coal in power plants is a new process. Tar is produced during the production of activated coke by gasification of pulverized coal. The existence of tar, on the one hand, will condense on the pyrolysis gas pipeline, resulting in blockage of the pipeline; on the other hand, it will condense on the surface of the active coke particles, blocking the pores on the surface of the active coke, thereby reducing the activity of the active coke. Therefore, effective tar control methods should be adopted during the coking process. There are many methods to control the tar content in pyrolysis gas, and the catalytic cracking technology has been paid attention to because of its relatively mild...

AI Technical Summary

Problems solved by technology

[0003] Currently, fixed bed gasifiers, fluidized bed gasifiers, and entrained bed gasifiers are commonly used. During the operation of these devices, problems such as slagging, uncontrollable solid particle distribution, uneven temperature distribution in the bed, semi- low coke activity

Moreover, the existing fluidized bed and fixed bed combined catalytic cracking tar device is relatively complicated

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