Process burner of water-coal slurry gasification furnace

Abstract

The invention relates to a process burner of a water-coal slurry gasification furnace. The process burner comprises an outer spray head and a middle spray head, wherein the outer spray head is used for oxygen circulation; the middle spray head is located inside the outer spray head and used for water-coal slurry circulation; an oxygen introduction part communicated with a chamber of the outer spray head is arranged on the middle spray head and is used for introducing oxygen in the chamber of the outer spray head into a chamber of the middle spray head; the oxygen introduction part is composed of an introduction hole and a buffering ring; the introduction hole is communicated with the chamber of the outer spray head and the buffering ring; and the buffering ring is communicated with the chamber of the middle spray head. Through the structure design, partial oxygen in the outer spray head is introduced into the chamber of an inner spray head, so that an oxygen layer is formed close to the inner wall of the inner spray head, and the oxygen layer can prevent direct contact between the water-coal slurry flowing through the middle spray head and the inner wall of the chamber of the middle spray head, thereby reducing the wearing of the water-coal slurry to the inner wall (inner chamber) of the chamber of the middle spray head, prolonging the maintenance period caused by the inner chamber wearing of the middle spray head, lowering investment and operation cost, and especially lowering the operation cost significantly.

Description

technical field [0001] The invention relates to a process burner of a coal-water slurry gasification furnace. Background technique [0002] The structure of the burner head commonly used in the gasification furnace process is as follows: figure 1 As shown, the factors that need to be considered in the design of the burner are as follows: [0003] (1) Structural form: three concentric casings, from the outside to the inside are the outer nozzle (outer oxygen pipe) 1, the middle nozzle (coal water slurry pipe) 2 and the inner nozzle (central oxygen pipe) 3, the inner nozzle (central oxygen pipe) The outlet of the oxygen pipe) 3 is designed to be in the form of a constriction, the purpose is to accelerate the central oxygen, and at the same time, its end surface has a certain amount of indentation relative to the reference plane of the burner section, thus forming a pre-mixing chamber for coal water slurry and central oxygen 4. The outlet pipeline of the coal-water slurry is ...

AI Technical Summary

Problems solved by technology

Under normal circumstances, the burner of the coal-water slurry gasification furnace needs to be shut down for inspection and replacement after 30 to 60 days of continuous operation. Therefore, the coal-water slurry gasification process must have a spare furnace, which increases investment and operating costs. one of the important reasons

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