Overhead multi-nozzle gasifier

Abstract

The invention discloses an overhead multi-nozzle gasifier. The overhead multi-nozzle gasifier comprises an outer shell, an inner shell, a main nozzle, a plurality of auxiliary nozzles, a first conveying device, a second conveying device, a lower shell and coolers, wherein the main nozzle is a firing-up and technological operation combined nozzle or a firing-up nozzle and is vertically arranged at the tops of the outer and inner shells; each auxiliary nozzle is a technological operation nozzle and is obliquely arranged at the tops of the outer and inner shells; a central extension line of an outlet of each auxiliary nozzle and a central extension line of an outlet of the main nozzle intersect at a point in a gasification chamber; the first conveying device is connected with the main nozzle; the second conveying device is connected with the auxiliary nozzles. The overhead multi-nozzle gasifier disclosed by the embodiment of the invention has the advantages of good material mixing, long material retention time, high carbon conversion rate, high processing capacity, convenience in load regulation, long service life, and the like.

Description

technical field [0001] The invention relates to an overhead multi-nozzle gasification furnace. Background technique [0002] Existing gasifiers include the following two types. One is a single-nozzle top-mounted gasifier. Because the material outlet of the top-mounted nozzle of this gasifier is directly facing the outlet of the gasifier, a part of the material will "short-circuit" (called "short-circuit stream"). ”), the residence time of this part of the material is short, resulting in a decrease in the carbon conversion rate of the gasifier. Moreover, the top of the gasification chamber of the single-nozzle overhead gasifier has a large black area, and the effective reaction volume of the gasifier is small. In addition, when the amount of coal processed reaches 1,500 tons / day or more, the processing effect of this single-nozzle overhead gasifier will become poor. [0003] Another kind of gasification furnace with multiple nozzles facing each other. The nozzles of this g...

AI Technical Summary

Problems solved by technology

Although this kind of gasifier solves the problem of "short-circuit stream", the nozzle will spray the material onto the opposite furnace wall, which greatly reduces the safety of the gasifier

Moreover, during the operation of this gasifier, the flames sprayed from the oppositely arranged nozzles will cause damage to the refractory material after colliding.

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