Heat-exchange type ascending tube and coke oven

Abstract

The invention provides a heat-exchange type ascending tube and a coke oven. The heat-exchange type ascending tube comprises an inner tube for conveying raw coke oven gas; both ends of the inner tube are respectively communicated with a coke oven carbonization chamber and a crossover tube. The heat-exchange type ascending tube also comprises an outer tube. The outer tube is arranged on the outer side of the inner tube; a cooling accommodating cavity is formed between the outer tube and the inner tube; the outer tube is provided with an input port and an output port which are communicated with the cooling accommodating cavity; a gas-state cooling medium for recycling heat in the raw coke oven gas goes into the cooling accommodating cavity from the input port and then flows out of the cooling accommodating cavity from the output port; the inner side of the inner tube is provided with a spiral guide rod arranged along the axial direction of the inner tube. The heat-exchange type ascending tube not only can reduce the temperature of the raw coke oven gas and recycle a part of heat in the raw coke oven gas, but also can reduce the usage amount of ammonia water and decrease the recycling cost of the raw coke oven gas.

Description

technical field [0001] The invention belongs to the field of coking and relates to auxiliary equipment for coke ovens, in particular to a heat-exchanging riser for a coke oven and a coke oven including the heat-exchange riser. Background technique [0002] In the field of coking, the recovery of raw coal gas can not only reduce air pollution, but also effectively utilize the beneficial components such as benzene and naphthalene in raw coal gas, thereby saving energy. [0003] Common raw gas recovery methods are as follows: After the raw gas is discharged from the coke oven carbonization chamber at a temperature of 650-700°C, it enters the bridge tube through the riser pipe and is cooled to about 90°C. to recycle. [0004] Among them, the riser pipe is only used to connect the coke oven carbonization chamber and the bridge pipe, and the temperature of the raw gas entering the bridge pipe is still 650-700°C. In order to improve the recovery operation conditions of the raw gas...

AI Technical Summary

Problems solved by technology

[0005] Before the raw gas enters the bridge pipe, its heat is not utilized, which causes a waste of energy; moreover, the raw gas is cooled in the bridge pipe with 0.15MPa ammonia water, and the higher temperature of the raw gas not only increases the consumption of ammonia water; Moreover, in the process of cooling the raw gas, part of the ammonia water is vaporized and mixed with the raw gas, thereby increasing the volume of the raw gas, which will lead to an increase in the water consumption of the subsequent condensing blast section, thereby increasing energy consumption and increasing the waste gas. gas recovery cost

Images