Ascension pipe evaporator, coking system and cooling method of ascension pipe evaporator

Abstract

The invention provides an ascension pipe evaporator, a coking system and a cooling method of the ascension pipe evaporator. The evaporator comprises an evaporator body, a steam-water assembly and a gas cooling assembly. The evaporator body is used for being connected with an ascension pipe, the steam-water assembly is connected with the evaporator body and used for being connected with a steam-water separation device, and the gas cooling assembly is connected with the evaporator body and used for cooling the evaporator body. According to the ascension pipe evaporator, the coking system and thecooling method of the ascension pipe evaporator, the situation can be avoided that after dry-burning, the ascension pipe evaporator explodes during water filling. Accordingly, the operation risks arereduced, and the use safety and stability are improved.

Description

technical field [0001] The invention relates to the technical field of recovery and utilization of coking waste heat, in particular to a rising tube evaporator, a coking system and a cooling method for the rising tube evaporator. Background technique [0002] In the coking waste heat recovery and utilization system, a rising tube evaporator is usually installed outside the rising tube, and the rising tube evaporator is provided with a water supply port and a steam water port, wherein the water supply port and the steam water port are connected to the steam drum, and the steam drum passes through the water supply port Feed saturated water into the riser tube evaporator, and the saturated water absorbs the high temperature of the raw gas in the raw gas channel in the riser tube inside the riser tube evaporator to form a steam-water mixture, which flows back into the steam drum through the steam-water port, and the steam drum The steam-water mixture is separated, and the separa...

AI Technical Summary

Problems solved by technology

[0003] However, in the process of replacing the riser evaporator, since the coke oven is not shut down, high-temperature raw gas will continue to pass through the raw gas channel of the riser, and the replacement speed of the riser evaporator is slow, so there will be a rise In the case of dry burning of the tube evaporator, that is, the inside of the rising tube evaporator is not filled with saturated water, and the rising tube evaporator is directly heated by the high temperature of raw gas

The temperature of the rising tube evaporator after dry burning can reach 500°C or even higher. If a large amount of saturated water suddenly enters the inside of the rising tube evaporator, the saturated water will quickly vaporize inside the rising tube evaporator to generate a large amount of steam, so that It will lead to overpressure explosion of the riser tube evaporator, which will seriously affect the safe operation of the coke oven and cause damage to people and property

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