Double-barrel water cooled wall type radiation waste boiler with adjusting function and industrial application thereof

Abstract

The invention discloses a recycling technology for sensible heat of high-temperature and high-pressure gasified products which are coal-gasified by an entrained flow bed, is particularly applicable for a waste boiler flow gasification furnace or a half waste boiler flower gasification furnace of a gasification island of an integrated gasification combined cycle (IGCC) power generation system, and provides a double-barrel water cooled wall type radiation waste boiler with an adjusting function. The double-barrel water cooled wall type radiation waste boiler consists of a flange connected with the gasification furnace, a shell for bearing high temperature and high pressure, an inner-layer water cooled wall, an outer-layer water cooled wall, a screen type water cooled wall, a soot blower and a slag pool positioned at the bottom, and comprises a water-spraying temperature reduction device with the adjusting function. Dust and slag which are carried by most air flows are caught and collected by the slag pool, and synthesized gas flows out from the single side of the radiation waste boiler. High-pressure water entering the radiation waste boiler recycles the sensible heat of the high-temperature and high-pressure gasified products and is converted into saturated high-pressure steam discharged from the outlet of the water cooled wall. By the double-barrel water cooled wall type radiation waste boiler, the high-position sensible heat of the gasified products can be recycled effectively, so the whole energy utilization efficiency can be improved; the double-barrel water cooled wall type radiation waste boiler has the characteristics of safe running, reliability and controllability, and is a clean and efficient energy recycling technology.

Description

technical field [0001] The invention relates to a technology for recovering sensible heat of high-temperature and high-pressure products produced by the gasification of carbon-containing solid fuels such as coal. Background technique [0002] Entrained bed gasifiers usually operate at high temperatures and conditions, and the gasification products have relatively high temperatures. Based on the requirements of different products for subsequent gasification processing, and according to the different process schemes for recovering high-temperature gas sensible heat, there are three gasification processes, namely the chilling process, the waste boiler process, and the waste boiler chilling combined process. [0003] The chilling process is often used for the production of synthetic ammonia and hydrogen production. The high-temperature gas and slag produced during the gasification process enter the quenching chamber, where they contact the quenching water, the gas cools down an...

AI Technical Summary

Problems solved by technology

[0007] The heat exchange surface of the existing radiant waste boiler cannot be densely arranged, resulting in a large volume, and has defects such as easy slagging and easy ash accumulation in the ring gap between the water-cooled walls, which poses a safety hazard in operation

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