Coke oven raw gas ascending pipe heat exchanger

Abstract

The invention discloses a coke oven raw gas ascending pipe heat exchanger. The coke oven raw gas ascending pipe heat exchanger with the work state convenient to detect is provided mainly for solving the problem that the work state of an ascending pipe heat exchanger is difficult to monitor. The coke oven raw gas ascending pipe heat exchanger comprises an outer shell, an interlayer shell and an inner shell which are sequentially arranged from outside to inside; heat conducting media are arranged in a sealed cavity defined by the inner shell and the interlayer shell; the volume of the heat conducting media is smaller than the volume of a cavity defined by the inner shell and the interlayer shell; a heat exchanging pipe is arranged between the inner shell and the interlayer shell; an inlet and an outlet of the heat exchanging pipe both penetrate out of the interlayer shell and the outer shell and are connected with the interlayer shell and the outer shell in a sealed manner; the cavity defined by the inner shell and the interlayer shell is communicated with a pressure measuring pipeline which is provided with a pressure measuring device; and the tail end of the pressure measuring pipeline is sealed. According to the coke oven raw gas ascending pipe heat exchanger, the work state of the ascending pipe heat exchanger can be monitored in real time by monitoring the pressure in the cavity between the inner shell and the interlayer shell.

Description

technical field [0001] The invention relates to a coke oven raw gas riser heat exchanger. Background technique [0002] Coking is an important part of the iron and steel process, and it is also a link with high energy consumption. In the coking process, there are three types of waste heat: high-temperature waste heat of coke slag, medium-temperature waste heat of raw coal gas and low-temperature waste heat of flue gas. Among them, there is no large-scale recovery of medium-temperature waste heat of raw coal gas. promote. The medium-temperature waste heat of raw coke oven gas accounts for about 36% of the entire coking process, which has a large space for utilization. At present, coking enterprises mostly use the method of spraying remaining ammonia water to reduce the raw gas from about 700°C to around 80°C for follow-up operations, resulting in waste of waste heat in this part. Therefore, many scholars have developed corresponding heat exchangers for waste heat recovery o...

AI Technical Summary

Problems solved by technology

At present, coking enterprises mostly use the method of spraying remaining ammonia water to reduce the raw gas from about 700°C to around 80°C for follow-up operations, resulting in waste of waste heat in this part

Therefore, many scholars have developed corresponding heat exchangers for the recovery of waste heat from raw gas, mainly for anti-coking and anti-corrosion, but most heat exchangers cannot consider their safety, that is, they cannot be found in time when a cooling medium leaks.

[0003] Coke oven raw gas contains H 2 Corrosive gases such as S are highly corrosive to the heat exchanger. Once the heat exchanger is corroded and perforated, the cooling medium will enter the coking furnace, especially when water is used as the cooling medium. When water leakage occurs, water and The hot coke undergoes vaporization reaction, and the pressure in the coking furnace will increase rapidly, causing damage to the coking furnace body

Application No. 201510497917.1 "A Coke Oven Gas Raw Gas Riser Working Status Monitoring System" uses infrared thermometers and range finders to measure the working status of the coking oven riser, but when the riser is replaced by a heat exchanger, the heat exchange The temperature change of the heat exchanger is not only related to the production process, but also related to the temperature of the medium. It is difficult for the monitoring system to find out whether the heat exchanger is damaged. Therefore, it is necessary to consider the safety design of the heat exchanger from the structure of the heat exchanger itself.

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