Ascending pipe waste heat insertion-type temperature control thermal expansion decoking heat pipe guiding-out method and device

Abstract

The invention relates to an ascending pipe waste heat insertion-type temperature control thermal expansion decoking heat pipe guiding-out method and device, and belongs to the technical field of coking furnace ascending pipe raw gas waste heat recycling. According to the technical scheme, a steam outlet pipe (13) and a water inlet pipe (14) are bent together to be of an L-type structure (1), the end of the horizontal segment of the L-type structure is provided with a detachable connector (22), the end of the perpendicular segment is provided with an anti-coking head (24), the steam outlet pipe is connected with a steam pocket (9), the water inlet pipe is connected with a water inlet system, raw gas and the water inlet pipe are isolated through the steam outlet pipe, the temperature of the exterior of the steam outlet pipe is not lower than the coking temperature, and meanwhile steam ascends gradually to heat inflowing water, so that the inflowing water is completely gasified. According to the ascending pipe waste heat insertion-type temperature control thermal expansion decoking heat pipe guiding-out method and device, the temperature is detected through a high-temperature thermocouple in the heat exchange process, the water yield of the inflowing water is controlled, and therefore coking of the exterior of the device is avoided; raw gas waste heat can be recycled, completely independent installation is achieved, the problems that a heat exchange device inside an ascending pipe is prone to coking, the ascending pipe is prone to explosion, installation is difficult, and the replacement and maintenance cost is high are solved, and the heat exchange amount is large.

Description

technical field [0001] The invention relates to a riser waste heat insertion type temperature-controlled thermal expansion decoking heat pipe derivation method and equipment, which can realize stable heat exchange, independent decoking, independent installation, and quick replacement, and belongs to the technical field of coke oven riser waste gas waste heat recovery. Background technique [0002] The raw gas temperature at the outlet of the coking chamber of the coke oven ascending pipe is about 750°C. The raw coal gas enters the bridge pipe after passing through the ascending pipe, and enters the gas collecting pipe after being cooled by sprayed ammonia water in the bridge pipe section. At this time, the raw gas temperature drops to 85°C. The heat taken away by raw coal gas accounts for 36% of the total heat of coking. Although the temperature of raw coal gas can be quickly reduced by circulating ammonia water, the process is complicated, the operation cost is high, and the...

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Problems solved by technology

In 2012, Wuhan Iron and Steel Co., Ltd. conducted an industrial test. The investment in this scheme was large, and there was a phenomenon of pipe bursting.

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