Dry-pulverized-coal gasification combined burner

Abstract

The invention discloses a dry-pulverized-coal gasification combined burner comprising a pulverized coal burner and an igniting burner. The pulverized coal burner sequentially comprises a first water-cooling jacket, a pulverized coal channel, a first oxidant channel and an inner barrel from outside to inside. The pulverized coal channel is directly adjacent to the first oxidant channel, and contracts toward the axial direction of the pulverized coal burner, at a position, adjacent to a flame-forward end. The first water-cooling jacket comprises a first water-inflowing channel, a window-type water-cooling groove and a first water-outflowing chanel, and the first water-inflowing channel is communicated with the first water-outflowing channel through the window-type water-cooling groove which is spirally wound at the flame-forward end of the pulverized coal burner. The igniting burner is arranged in the inner barrel and comprises a second water-cooling jacket, a second oxidant channel, a fuel channel, an igniter and a center nitrogen channel. By the arrangement, an ignition process is simplified, and reliability of ignition and operation of pulverized coal is improved; flame diameter is effectively controlled, a membrane water-cooling wall is prevented from being damaged by flames, and reliability of a gasification furnace is improved.

Description

technical field [0001] The invention relates to a dry coal powder gasification burner. Background technique [0002] Coal gasification refers to sending properly treated coal (such as coal powder, coke particles, combustible powder, etc.) into a reactor such as a gasifier, and passing an oxidant ( air or oxygen and steam) into gases in a certain way to obtain synthesis gas (such as CO, H 2 、H 2 O.CO 2 etc.), the synthesis gas generated by coal gasification can be widely used in various chemical industries. In the coal gasification process, the burner is an indispensable and important part. [0003] There are generally two feeding methods for the existing pulverized coal gasifier. One is to use the start-up burner to raise the temperature (boost pressure) of the gasifier. Coal powder, and start the gasification reaction; the second is to adopt the form of combined operation of the ignition burner and the coal powder burner, first use the ignition burner to ignite and boo...

AI Technical Summary

Problems solved by technology

[0006] The purpose of this invention is to optimize the combination of the ignition burner and the pulverized coal burner, so as to provide a new dry coal pulverized gasification combination burner, which does not need to insert or pull out the burner multiple times, and at the same time overcomes the uncontrollable combustion flame Diameter and the resulting problem of easy burning of the membrane water wall

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