Substitute natural gas reaction heat recovery device

Abstract

The invention discloses a substitute natural gas reaction heat recovery device. The substitute natural gas reaction heat recovery device comprises a housing with internal U-shaped heat exchange tubes, the lower end of the housing is provided with a clean water inlet, the upper end of the housing is provided with a steam pocket, and one end of the housing is provided with a tube sheet; a tube box is arranged outside the tube sheet, the inner cavity of the tube box is divided by a pass partition plate into a high-temperature upper cavity and a low-temperature lower cavity; the U-shaped heat exchange tubes are arranged on the tube sheet and communicated with the high-temperature upper cavity and the low-temperature lower cavity of the tube box; the gas inlet end of the high-temperature upper cavity is communicated with a reaction gas inlet; the gas outlet end of the low-temperature lower cavity is communicated with a reaction gas outlet; a fire-resistant heat insulation lining and a heat-resisting protect cover are arranged inside the tube box. The substitute natural gas reaction heat recovery device solves the problem of heat recovery of high-temperature gas generated during the substitute natural gas production process; substitute natural gas reaction heat recovery and recycling saves energy sources and avoids earth heat effects due to massive high-temperature gas emitted into the air.

Description

technical field [0001] The invention relates to a heat recovery device, in particular to a reaction heat recovery device for coal-to-natural gas. Background technique [0002] As a clean, safe and high-quality energy, natural gas is increasingly favored by people. It has become a development trend in China to replace oil with gas, generate electricity with gas, and turn cities into gas. In the consumption structure of natural gas, chemical industry and city gas account for More than 60% of the total. China is a country rich in coal, short of oil and gas, and the per capita share of natural gas resources is less than 10% of the world's average level. Therefore, coal is converted into natural gas to replace part of natural gas resources and reduce dust pollution caused by direct use of coal or coal transportation. , in line with the country's industrial policy, is also a new way to open up clean energy. The national plan covers five horizontal and two vertical natural gas pi...

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Problems solved by technology

In addition, the structure of the current reaction heat recovery device is generally a heat exchanger structure. When it is used to cool the high-temperature reaction gas at 750 °C, not only the tube spacing is small, but the volume of the cooling water expands rapidly at high temperature, and there is no corresponding wide space. , and the temperature of the high-temperature reaction gas at 750°C is relatively high and contains a large amount of hydrogen, which will seriously corrode the heat exchanger. Therefore, the built-in structure of this reaction heat recovery device is not suitable for waste heat recovery of coal-to-natural gas

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