Combined burner cooling cover device

Abstract

The invention provides a combined burner cooling cover device. The combined burner cooling cover device comprises a burner cover, a middle water cooling wall and a hearth water cooling wall which are sequentially arranged around a burner from inside to outside. The burner cover is of a hollow structure in a coil pipe mode so that a burner cover cooling channel can be formed. The middle water cooling wall is of a hollow structure in a coil pipe mode so that a middle water cooling wall cooling channel can be formed. The burner cover cooling channel and the middle water cooling wall cooling channel are nested from inside to outside; the burner is arranged in the burner cover cooling channel in a penetrating manner; a furnace shell of the gasification furnace is provided with a burner mounting pipe orifice, and an accommodating space is defined by the furnace shell; the hearth water cooling wall is arranged in the accommodating space; a through hole opposite to the burner mounting pipe orifice is formed in the hearth water cooling wall; the combined burner cooling cover device is connected with the furnace shell in a mounting mode of sequentially penetrating through the burner mounting pipe orifice and the through hole; according to the embodiment of the invention, the cooling effect around the burner cover can be enhanced, the service life of the burner cover is prolonged, replacement and maintenance are convenient, and replacement outside the furnace can be realized.

Description

technical field [0001] The invention belongs to the technical field of coal gasification, in particular to a combined burner cooling cover device. Background technique [0002] Entrained bed gasification technology is an important method for gasification of carbonaceous substances. Fuel and gasification agent are introduced into the gasification furnace at a certain speed through nozzles, and after being fully mixed, incomplete combustion reactions occur. The temperature is generally above 1400°C. Due to the high-speed jet entrainment effect of the burner, the temperature near the burner is extremely high. If the cooling at the end of the burner is insufficient, the thermal stress is too high, which will easily cause the burner head to burn. In the prior art, a burner cooling cover is usually designed outside the burner to provide a cooling channel for the burner, which plays the role of protecting the burner and shaping the flame. [0003] The working environment in the vi...

AI Technical Summary

Problems solved by technology

However, the working environment of the burner hood is harsh, and it is easily damaged by high heat flux and surface corrosion. At the same time, the furnace water wall around the burner hood is also subjected to a severe working environment

[0006] The burner cover is a vulnerable part. The main focus of the existing technology is to prolong the life of the burner cover. However, although the life of the burner cover is extended, the working environment of the surrounding furnace water wall has not been improved. Once the furnace water wall is burned, Can only enter the gasifier furnace for maintenance

There are also technologies that consider improving the burner cover to cover its surrounding furnace water wall, but these improvements inevitably face the problem of difficult maintenance, that is, the burner cover can only be replaced inside the gasifier furnace

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