A Sulfur-tolerant Shift System for Coal-Making Gas that Can Improve the Cooling Efficiency of Shutdown and Start-up

Abstract

The invention discloses a coal-made gas sulfur-resistant shift system capable of improving the cooling efficiency of shutdown and start-up, comprising a circulating gas compressor, an electric heater, a shift furnace, a shift gas final cooler and an ammonia washing tower connected in series by pipelines. A shutdown water cooling device is installed at the outlet of the circulating gas compressor, and the shutdown water cooling device is connected in parallel with the pipeline between the circulating gas compressor and the electric heater. During shutdown, the high-temperature gas from the circulating gas compressor enters the shutdown water cooling device to be cooled. Water cooling; a start-up cooling water cooling device is set at the entrance of the shift gas final cooler, and the start-up cooling water cooling device is connected in parallel with the pipeline between the shift furnace and the shift gas final cooler, and the high-temperature gas from the shift furnace enters the start-up operation. The cooling water in the water cooling device is cooled to the normal operating temperature of the shift gas final cooler or below, and then enters the shift gas final cooler to prevent the impact of the ultra-high temperature circulating gas on the shift gas final cooler.

Description

technical field [0001] The invention relates to a coal-made gas-sulfur-resistant shift system capable of improving the cooling efficiency of shutdown and start-up. Background technique [0002] With the development of science and technology, the requirements for long-term equipment and equipment maintenance efficiency of petrochemical plants are getting higher and higher. Existing cooling technology for coal gas-to-sulfur-tolerant shift systems in the industry during shutdown: the cooling process in the shutdown stage of catalyst bed cooling is simple, but the cooling efficiency is low, and the nitrogen consumption is large, which is difficult to meet the requirements of efficient maintenance of coal-to-gas plants; The cooling process during the start-up preheating and heating stage is simple, but the inlet temperature of the shift gas final cooler far exceeds the normal operating temperature, which may easily lead to internal leakage of the shift gas final cooler and affect...

AI Technical Summary

Problems solved by technology

Cooling technology in the process of shutdown and start-up of the sulfur-resistant conversion system of coal gas production in the existing industry: the cooling process of the shutdown catalyst bed cooling stage is simple, but the cooling efficiency is low and the nitrogen consumption is large, which is difficult to meet the requirements of efficient maintenance of coal gas production equipment; The cooling process in the warm-up stage is simple, but the inlet temperature of the final cooler of the shift gas is far higher than the normal operating temperature, which may easily lead to internal leakage of the final cooler of the shift gas and affect the long-term operation of the device.

Images