Gasification system for recycling high-temperature sensible heat

Abstract

The invention belongs to the field of energy and chemical industry and relates to a gasification system for recycling high-temperature sensible heat. The system includes the following process steps: 1. a pretreatment process; 2. a gasification process; 3. a sensible heat recovery and utilization process; 4. a waste heat convection recovery and ash separation process; 5. a dry ash removal process;6. a cooling washing process; 7. a slag treatment process; and 8. a black water treatment process. High-grade heat energy generated by gasification can be recovered while synthesis gas producing, by-product steam is used for power generation, the heat energy recovery rate of the gasification system is improved, the production cost of coal chemical products is effectively reduced, pollutant emission is reduced, and environmental indicators are superior.

Description

technical field [0001] The invention belongs to the field of energy and chemical industry, and relates to a gasification system for recovering and utilizing high-temperature sensible heat. Background technique [0002] my country is a country rich in coal, poor in oil, and low in gas. Coal will remain the main fossil energy in my country for a long time. The direct combustion and utilization of coal at this stage not only has a low energy utilization rate, but also causes serious environmental pollution, thus promoting the development of clean coal utilization technology. Coal gasification technology is the key and leading technology for clean and efficient utilization of coal. At present, gasification technology can be mainly divided into three categories, fixed bed, fluidized bed and entrained bed gasification technology; among them, entrained bed gasification technology has gradually become the mainstream due to its large industrial scale, wide adaptability of raw materi...

AI Technical Summary

Problems solved by technology

Although chilled process gasification technology has the advantages of short process flow, low fixed investment, and simple operation and maintenance, it also generally has the disadvantages of relatively low energy utilization rate and high water consumption, which is in line with the requirements of the development of modern coal chemical industry in my country. There is a gap

At the same time, the existing waste boiler process gasification technology does not directly connect the high-temperature synthesis gas with a temperature of about 1500 °C to the radiant waste boiler for cooling, and the investment is relatively high

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