Coke oven raw gas sensible heat recovery device and recovery method

Abstract

The invention discloses a sensible heat recycling device for coke oven raw gas, and relates to a device for recycling and utilizing the heat of raw gas in a coke oven nickel alloy riser pipe. It includes a housing, an upper support, a lower support, and a mandrel. The upper end of the mandrel is connected to the upper end of the housing or the upper support through a positioning plate, and the lower end of the mandrel is connected to the lower end of the housing or the lower support through a positioning plate. The shell includes an outer cylinder located on the outer layer of the shell, and a nickel alloy riser located on the inner layer of the shell. There is a steam generator fixed on the outer wall of the nickel alloy riser in a spiral shape. The steam generator is filled with process media. The heat conductor is filled in the gap between the nickel alloy riser, the outer cylinder and the steam generator. The upper end of the shell is equipped with an outlet pipe connected with the outlet of the steam generator, and the lower end of the shell is installed with a The inlet pipe connected to the inlet. The invention also discloses a recycling method of the coke oven raw gas sensible heat recycling device.

Description

Technical field [0001] The invention relates to a device for recovering and utilizing the heat of raw gas in a nickel alloy riser of a coke oven, in particular to a device for recovering and utilizing the sensible heat of the raw gas of a coke oven. The invention also relates to a recycling method of the sensible heat recovery and utilization device of the raw coke oven gas. Background technique [0002] About 36% of the heat generated in the production process of the coke oven is taken away by the high-temperature raw gas at 650-750℃. At present, the method of spraying circulating ammonia water is generally used to reduce the temperature of the raw gas. This method not only wastes the sensible heat of the raw gas, but also Increasing the process load of the ammonia recovery section will also increase energy consumption. Therefore, recovery of the sensible heat of coke oven raw gas is of great significance to energy saving and emission reduction. my country’s "Twelfth Five-Year ...

AI Technical Summary

Problems solved by technology

[0004] 1) Water jacket technology. After a period of operation of WISCO’s water jacket technology, the weld seam will fail, causing water leakage in the jacket and affecting the operation safety of the coke oven. Although the water jacket weld seam structure has been improved many times, it has not changed from Fundamentally solve the problem of weld failure, in order to ensure the safety of coke oven operation, the user finally chose to dismantle;

[0005] 2) Heat-conducting oil jacket technology. Jinan Iron and Steel Co., Ltd. once conducted a test of heat-conducting oil on the nickel alloy riser to recover the waste heat of raw gas. The operating environment temperature is high, the heat transfer medium is easy to age and deteriorate, there are potential safety hazards, and the operating cost is high and cannot be accepted by enterprises;

[0006] 3) Heat pipe technology. Baosteel has done a test of using high-temperature heat pipes to recover waste heat from raw coal gas. However, due to the high cost of high-temperature heat pipes, the heat pipe materials are easily corroded, and the reliability is not high, it cannot be applied industrially.

[0007] In addition, the water (oil) jacket raw gas sensible heat recovery technology most often has the problem of coking at the root, which affects the heat transfer of the heating surface, and even blocks the raw gas channel in severe cases

Images