Waste heat boiler device of entrained bed gasifier

Abstract

The invention relates to a waste heat boiler device of an entrained bed gasifier. The waste heat boiler device comprises a gasifier, a radiation waste heat boiler and a convection waste heat boiler. The waste heat boiler device is characterized in that the radiation waste heat boiler is arranged below the gasifier, a slag downcomer is arranged in the middle of the top of the radiation waste heat boiler along the axial direction, the upper pipe orifice of the slag downcomer is communicated with the bottom of the gasifier, and the lower pipe orifice of the slag downcomer is communicated with the radiation waste heat boiler; a water cooling wall is arranged on the inner wall of the radiation waste heat boiler along the circumferential direction, and a plurality of chilling spray heads are uniformly arranged on the radiation waste heat boiler on the lower end of the water cooling wall along the circumferential direction; a slag pool filled with cooling water is arranged on the bottom of the radiation waste heat boiler, and a slag discharge opening is formed in the bottom of the slag pool; a gas outlet is formed in the side face of the lower part of the radiation waste heat boiler above the liquid level of the slag pool, and the gas outlet is communicated with the gas inlet of the convection waste heat boiler. According to the waste heat boiler device, an existing industrial device problem is solved in a new way, waste heat boiler industrialization is realized, the gasification efficiency of hot coal gas can be improved by 10-15%, the defects in the prior art can be compensated, and better energy saving and emission reduction are reflected as well.

Description

technical field [0001] The invention relates to a boiler device, in particular to a waste boiler device of an entrained entrained gasifier, which recovers the waste heat of hot gas and high-temperature slag after the existing entrained entrained bed gasification through radiation and convection heat conduction. Background technique [0002] At present, there are many entrained bed gasification technologies at home and abroad, among which Texaco, multi-component slurry, multi-nozzle, Tsinghua furnace, Siemens gasifier, aerospace furnace, Shell gasifier and other technologies are widely used in coal chemical industry. The common feature of these technologies is that the gasification reaction of coal, oxygen and water vapor occurs in the gasifier to generate high-temperature gas and molten waste residue at about 1400 degrees, and the high-temperature gas is directly quenched with water to cool down to about 250 degrees to enter the next process. In this coal gasification proces...

AI Technical Summary

Problems solved by technology

However, due to certain defects in the process and design of waste heat boilers, slag blockage often occurs in radiant waste boilers, and the gasification reaction cannot continue, making it difficult to promote the process technology of entrained flow bed with waste heat boilers

Images