Comprehensive treatment process of conversion condensate

Abstract

The invention discloses a comprehensive treatment process of conversion condensate. The method comprises the following steps: firstly, removing NH3, H2S and CO2 in conversion condensate and gasified high-flash gas by using a normal-pressure stripping tower, cooling a top gas phase, feeding a liquid phase into a pressurizing stripping tower, by a single-tower pressurizing belt side line extractionprocess, mixing the top gas phase with a gas phase of a normal-pressure stripping tower after condensation and liquid separation, removing ammonia in the gas through a water washing tower, then removing and recovering sulfur, discharging or recycling purified water at the bottom after being cooled, and producing sulfur-free ammonia water with the mass concentration of 20% is produced after hydrogen sulfide is removed through a multi-effect acidic tail gas purifier after three-stage condensation and liquid separation are carried out on middle side extraction. The method has the advantages of reasonable process design, stable device operation and high added value of products, has huge environmental protection benefits, and solves the problems that the ammonia water treated by the conversioncondensate contains sulfur and acidic gas carries ammonia.

Description

technical field [0001] The invention belongs to the field of coal chemical industry and relates to a comprehensive treatment process for transforming condensate. Background technique [0002] In the coal-water slurry gasification and pulverized coal gasification process, the gasified crude gas enters the carbon monoxide conversion section, reacts with water vapor under a catalyst and a certain temperature, and generates carbon dioxide and hydrogen. Excessive steam is required in the carbon monoxide section, resulting in these Except for part of the water vapor participating in the reaction, most of the water vapor becomes a shift condensate after cooling. The main impurities are ammonia, hydrogen sulfide, carbon dioxide and some HCN, which are usually removed by steam stripping, and the purified condensate is sent back to the upstream gasification device for reuse. [0003] Domestically, the single-tower stripping or double-tower stripping process is adopted. In these two p...

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Problems solved by technology

[0007] The purpose of the present invention is to achieve the purpose of processing and transforming the condensate through a reasonable process route, and recover the ammonia and sulfur in the condensate, so as to ensure that the ammonia water is qualified sulfur-free ammonia water, the ammonia content in the acid gas is low, and no clogging occurs , and can be sent to sulfur recovery to make sulfur, so as to solve the problems of acid gas with ammonia at the top of the tower blocking the pipeline and high sulfur content in ammonia water

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