Coal water slurry purification pre-conversion furnace

Abstract

The invention discloses a coal water slurry purification pre-conversion furnace which comprises a furnace body, a scale collecting basket and a distribution basket, the scale collecting basket and thedistribution basket are arranged in the furnace body, an upper aluminum oxide ceramic ball layer is laid on the upper side of a pre-conversion protective agent layer in the furnace body, the scale collecting basket is placed on the upper aluminum oxide ceramic ball layer, a gap is formed between the scale collecting basket and the inner wall of the furnace body, and the distribution basket is arranged at the lower side of the scale collecting basket. The lower end of the distribution basket extends into the pre-conversion protective agent layer, and the projection of the scale collecting basket covers the distribution basket; the scale collecting basket is provided with a first gas flow channel and is filled with at least one of a strip-shaped pre-conversion protective agent and a secondaluminum oxide ceramic ball, and supporting legs are arranged at the lower part of the scale collecting basket; the distribution basket is provided with a second gas flow channel and is filled with athird aluminum oxide ceramic ball, and gas flow can enter the distribution basket through the space between the supporting legs of the scale collecting basket. By utilizing the pre-conversion furnace,the effective scale collection capacity of the pre-conversion furnace is greatly increased, the operation period of the pre-conversion furnace is prolonged, and the agent replacement frequency is reduced, so that the agent replacement cost and the operation risk of an enterprise are effectively reduced.

Description

technical field [0001] The invention relates to a coal-water slurry purification pre-converter, belonging to the technical field of coal-water slurry gasification. Background technique [0002] In GE coal water slurry gasification technology, coal water slurry and pure oxygen are sprayed into the gasifier through the process burner, and partial oxidation reaction occurs in the furnace of the gasifier to generate crude water gas. The crude water gas is washed by the scrubber to remove particles and then sent to the downstream purification process. Due to the limited washing effect of the scrubber, the water gas entering the purification conversion device still contains a large amount of fine particles, which makes the conversion catalyst prone to dust and agglomeration, resulting in catalyst Decreased or even inactivated. In order to prolong the service life of the catalyst as much as possible, a pre-change furnace device is added. A layer of alumina ceramic balls and a pre-...

AI Technical Summary

Problems solved by technology

The cut-out pre-conversion furnace needs to be refueled, and the cost of carrying out a pre-conversion furnace refueling operation is relatively high to process 429,000m 3 (Standard) / h water gas pre-conversion furnace as an example, the catalyst replacement cost is 100,000 yuan / time, the construction cost is 100,000 yuan / time, and a large safety risk needs to be borne in the process of changing the catalyst

Images