Ascending pipe heat exchange device for raw gas of coke oven

Abstract

The invention discloses an ascending pipe heat exchange device for the raw gas of a coke oven, and belongs to the technical field of recycling utilization of raw gas afterheat. The ascending pipe heat exchange device for the raw gas of the coke oven comprises a flue gas inlet flange arranged at the lower end of the ascending pipe heat exchange device, a flue gas outlet flange arranged at the upper end of the ascending pipe heat exchange device, an inner barrel, a middle barrel and an outer barrel, wherein an inner sandwich layer is formed between the inner barrel and the middle barrel, desalted water or nitrogen or air is fed into the inner sandwich layer, and an outer sandwich layer is formed between the middle barrel and the outer barrel and is a closed thermal insulating layer. The ascending pipe heat exchange device can be used for ensuring a heat exchange effect, effectively, safely and reliably recycling the raw gas afterheat, ensuring the safe and economic operation of the coke oven and a heat exchanger under severe working conditions and meanwhile solving the problem of narrow adaptation of a conventional heat exchanger in starting and stopping processes.

Description

technical field [0001] The present invention relates to a heat exchange device, in particular to a heat exchange device of a coke oven waste gas riser. Background technique [0002] The efficient recovery and utilization of the waste heat resources generated in the coking process is the main direction to establish a resource-saving and environmentally friendly green coking plant for energy saving, and it is also one of the main ways to reduce the energy consumption of coke ovens. However, my country's exploration of secondary energy quality potential, value development, and low-quality waste heat and waste energy utilization support technology and equipment development are lagging behind, and the waste heat of high-temperature coke oven waste gas in the riser has not been effectively utilized. Cooling is a waste of heat. Some people exchange heat with the waste gas and the process medium water in the jacket, but the problem of sticking tar and flocculation on the heat exchan...

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Problems solved by technology

[0007] The purpose of the present invention is to overcome the disadvantages that the existing coke oven raw gas riser pipe heat exchange device is easy to coke and block, has a great impact on the external environment, and is not ideal for high temperature treatment and the use of heat exchangers in the process of starting and stopping. A coke oven raw gas riser heat exchange device is provided. The technical solution of the present invention not only ensures the heat exchange effect, effectively, safely and reliably recovers the waste heat of the raw gas, but also ensures that the coke oven and the exchange The safe and economical operation of the heat exchanger solves the problem of poor adaptability of the previous heat exchanger in the process of starting and stopping, and ensures that the equipment can operate safely and normally at extremely high temperatures (1400°C).

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