Raw gas riser pipe heat exchange device for coking furnace

Abstract

The invention provides a raw gas riser pipe heat exchange device for a coking furnace. The device comprises an inner barrel, a middle barrel, a heat exchange assembly, an outer barrel and a heat insulation piece, wherein the inner barrel is provided with a smoke flue penetrating through the inner barrel, and the smoke flue is provided with an inlet located in the lower end of the inner barrel and an outlet located in the upper end of the inner barrel; the heat exchange assembly is arranged between the inner barrel and the middle barrel, gaps are reserved between the heat exchange assembly and the inner barrel as well as between the heat exchange assembly and the middle barrel, and a fluid outlet and a fluid inlet are formed in the upper end and the lower end respectively; the heat insulation piece is arranged between the middle barrel and the outer barrel. According to the raw gas riser pipe heat exchange device for the coking furnace, the heat exchange assembly is arranged between the inner barrel and the middle barrel, and the gaps are reserved between the heat exchange assembly and the inner barrel as well as between the heat exchange assembly and the middle barrel, that is, the heat insulation assembly is independent of the inner barrel and the middle barrel, is suspended between the inner barrel and the middle barrel and is not contacted with the inner barrel and the middle barrel, so that the influence of stress change of the barrels under various thermal-state working conditions on the heat exchange assembly is reduced; the heat insulation piece has a heat insulation effect on the device, the heat exchange efficiency of the device is improved, and the environmental influence of heat produced by the raw gas is reduced.

Description

technical field [0001] The invention relates to the technical field of heat exchange devices, in particular to a coke oven raw gas riser heat exchange device. Background technique [0002] The efficient recovery and utilization of waste heat resources generated in the coking process is the main direction of building a resource-saving and environmentally friendly green coking plant for energy conservation, and it is also one of the main ways to reduce coke oven energy consumption. At present, coking plants usually use the method of spraying circulating ammonia water to cool the high-temperature raw gas, resulting in waste of heat from the raw gas. Therefore, many types of coke oven riser heat exchange devices have emerged to collect and utilize the heat. . But the existing coke oven riser heat exchange device has the following problems: [0003] 1. The high-temperature and anti-corrosion material of the inner cylinder wall has a low yield rate, large surface gap ratio, low ...

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Problems solved by technology

[0003] 1. The high-temperature and anti-corrosion material of the inner cylinder wall has a low yield rate, large surface gap ratio, low thermal conductivity, and low shear resistance, which affect the cost, heat exchange efficiency, stability and service life of the heat exchanger;

[0004] 2. The structural form of the heat exchange part of the middle tube has low repeatability in processing and production, large individual differences in quality, long production cycle, large and unstable fluid resistance, resulting in instability of the water circulation system and stress failure of the structure in some cases ;

[0005] 3. The structural form of the water inlet and outlet of the heat exchanger cannot better match the thermal parameters of the fluid, and it is easy to form air resistance, and it cannot better eliminate the damage caused by thermal stress under various working conditions;

[0006] 4. It is very difficult to scale up the product

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