A high-efficiency ash removal device and process for gas at the outlet of a multi-component gasifier

Abstract

The invention discloses an efficient ash removal device and technology for multielement gasifier outlet gas. The efficient ash removal device comprises a gas spraying device, a spraying mixing device, an efficient rotation ash removal device, a spraying scrubbing device and a synthesis gas scrubbing tower which are communicated with a gasifier synthesis gas outlet, wherein the spraying mixing device communicated with the gas spraying device is arranged in the rear of the gas spraying device; the efficient rotation ash removal device communicated with the spraying mixing device is arranged in rear of the spraying mixing device; the outlet of the efficient rotation ash removal device is communicated with the spraying scrubbing device (a primary venturi scrubber); synthesis gas output by the spraying scrubbing device (the primary venturi scrubber) is fed into the synthesis gas scrubbing tower. The efficient ash removal device further reduces entrainment of coal ash in the synthesis gas, greatly improves the dust removal effect, avoids the problems that equipment is blocked during the subsequent process because the synthesis gas carries dust and the safe and reliable operation in a long period is affected, has steam recovery, spraying and scrubbing effect, and is simple in technical operation, low in cost and convenient to maintain.

Description

technical field [0001] The invention relates to the field of pulverized coal gasification furnaces, in particular to a high-efficiency ash removal device and process for outlet gases of multi-component gasification furnaces. Background technique [0002] At present, in the industrial production process of pulverized coal pressurized continuous gasification in the field of coal chemical production, there is a lot of coal ash entrained in the synthesis gas, and dust accumulation is prone to occur at the pipeline interface of the gasifier synthesizer outlet due to the air flow, resulting in post-process The equipment is clogged and difficult to clean. In addition, the existing ash removal process is just that the synthesis gas of the gasifier is mixed with the condensate after first-stage Venturi washing and then directly enters the synthesis gas scrubber. The dust content in the gasifier synthesis gas is high, the ash removal effect of the ash removal equipment is poor, and t...

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Problems solved by technology

[0002] At present, in the industrial production process of pulverized coal pressurized continuous gasification in the field of coal chemical production, there is a lot of coal ash entrained in the synthesis gas, and dust accumulation is prone to occur at the pipeline interface of the gasifier synthesizer outlet due to the air flow, resulting in post-process The equipment is clogged and difficult to clean

In addition, the existing ash removal process is that the synthesis gas of the gasifier is mixed with the condensate after first-stage Venturi washing and then directly enters the synthesis gas scrubber for scrubbing.

The dust content in the gasifier synthesis gas is high, the ash removal effect of the ash removal equipment is poor, and the ash is concentrated in one equipment with high concentration, and the ash discharge pipe at the bottom of the scrubber is easy to block, which seriously restricts the long-term stable operation of the device

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