A coke oven raw gas rising pipe heat exchange device

Abstract

The invention discloses a coke oven raw gas ascension pipe heat exchange device. The coke oven raw gas ascension pipe heat exchange device comprises a barrel, a heat exchange medium inlet pipeline and a heat exchange medium outlet pipeline, wherein the heat exchange medium inlet pipeline are arranged at the lower end of the barrel, the heat exchange medium outlet pipeline is arranged at the upper end of barrel. The barrel sequentially comprises an inner barrel body, an interlayer sleeve and an outer barrel body from inside to outside. An inner interlayer is formed between the inner barrel and the interlayer sleeve. An outer interlayer is formed between the interlayer sleeve and the outer barrel body. A heat exchange medium flows for a circle along the bottom of the ascension pipe heat exchange device under the guide of a lower annular baffle plate and then flows into the inner interlayer located on the upper side of the lower annular baffle plate, so that heat exchange at the bottom of the ascension pipe heat exchange device is uniform, and no heat exchange medium stagnation point exists at the bottom of the ascension pipe heat exchange device. In this way, thermal stress distribution at the bottom of the ascension pipe heat exchange device is uniform, and the bottom of the ascension pipe heat exchange device is not prone to damage caused by thermal stress. Through an upper annular baffle board, steam above the upper annular baffle board is more easily discharged out than steam below the upper annular baffle board, and therefore the situations that because of steam stagnation on the top of the ascension pipe heat exchange device, the top structure of the ascension pipe heat exchange device is locally overheated and generates thermal stress, and the ascension pipe heat exchange device is damaged are avoided.

Description

technical field [0001] The invention relates to the technical field of heat exchange devices, in particular to a coke oven raw gas riser heat exchange device. Background technique [0002] There are a lot of waste heat and waste energy resources in the coking production process. Most of the coke oven heat expenditure is available waste heat, of which: coke sensible heat accounts for 37% to 40%, waste gas sensible heat accounts for 18% to 20%, waste Coal gas sensible heat accounts for 30% to 35%, and the three waste heats account for about 90% in total, which accounts for nearly 70% of the energy consumption of coking production. No matter for coking enterprises or waste heat recovery equipment manufacturers, coke oven gas waste heat recovery is worthwhile. The direction of attention and investment has broad market prospects. At present, most coke ovens cool the raw gas by spraying ammonia water. While cooling the raw gas at 600-750 °C to 80-100 °C, a large amount of ammonia...

AI Technical Summary

Problems solved by technology

In the above process of the prior art, the heat of the high-temperature raw gas is converted into useless low-temperature water vapor (about 80° C.) and a large amount of circulating water is required for cooling. The existing defect is that the heat of the high-temperature raw gas is wasted, and consume a lot of water

At present, the coke oven riser heat exchange device in the prior art has a complex structure, poor heat transfer effect, and cannot effectively recover the waste heat of raw gas, resulting in serious energy waste, and the heat exchange medium of the riser heat exchange device The heat exchange medium will be stagnated at the inlet and the heat exchange medium outlet, which is prone to local overheating of the structure, and thermal stress will cause damage to the riser heat exchange device

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