Combustion system and burner

Abstract

The invention belongs to the field of coal gasification combustion, and relates to a combustion system and a burner. The combustion system comprises a control system, the burner and a gasification furnace which are connected in sequence, wherein the burner comprises a cooling water jacket and an outer sleeve; the cooling water jacket is of an annular cavity structure and is arranged in the outer sleeve; the first outer wall of the cooling water jacket forms a central channel of the burner; and the second outer wall of the cooling water jacket and the inner wall of the outer sleeve form a nitrogen channel. According to the invention, the burner with a special structure and the wall of the gasification furnace are oppositely arranged at an angle of 17-20 degrees, and the rotational flow angle of the air supply outlet of the burner is controlled to be 1-30 degrees, so the problems of deviated combustion, channeling and the like of the gasification furnace can be effectively avoided.

Description

technical field [0001] The invention belongs to the field of coal gasification combustion, relates to a combustion system and a burner, and more particularly relates to a combustion system and a burner for forced air supply into a pressurized high-temperature coal seam. Background technique [0002] Coal gasification refers to the process in which coal, coke, semi-coke and other solid fuels react with gasification agents under high temperature, normal pressure or pressurized conditions, and are converted into gas products and a small amount of residue. The traditional coal gasifier uses refractory bricks as the inner lining. On the one hand, the refractory bricks will be eroded by the high temperature gas, and on the other hand, the refractory bricks need to be replaced regularly due to their extreme temperature resistance conditions. Therefore, the current coal gasifier basically adopts the water-cooled wall liner structure to use the solid slag layer on the water-cooled wa...

AI Technical Summary

Problems solved by technology

But in reality, the cooling pipe cannot enter the high-temperature head, and can only take away the heat of the burner through the conduction heat, so that the burner head needs to be surfacing and repaired almost every month, which affects the normal operation of the entire gasification device , causing huge economic losses to the enterprise

[0004] In addition, due to the unreasonable distribution of the nozzles of the existing combustion system and the uneven gas distribution of the air supply port, the gasifier has problems such as partial burning and channeling, which further lead to the melting of the slag layer, the decline of the gas quality (high CO2 content), and the gas temperature. advanced defects

Therefore, when necessary, it is necessary to stop the car to deal with partial burning and channeling problems, causing unnecessary economic losses to the production enterprise

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