Coke oven ascension pipe heat exchanger with changeable heat exchange area

Abstract

The invention discloses a coke oven ascension pipe heat exchanger with a changeable heat exchange area. The ascension pipe heat exchanger comprises an ascension pipe heat exchanger body, wherein a cylinder body of the ascension pipe heat exchanger body is vertically arranged. The ascension pipe heat exchanger further comprises a heat exchange plate, a driving mechanism, an upper temperature sensor, a middle temperature sensor, a lower temperature sensor and a controller, wherein the heat exchange plate is vertically arranged; a through hole matched with the heat exchange plate is formed in theupper end of the cylinder body; the lower end of the heat exchange plate penetrates through the through hole and is attached to the hole wall of the through hole in an up-and-down sliding manner; a platform extending outwards is horizontally arranged at an opening in the upper end of the cylinder body; the driving mechanism is arranged on the platform and is in transmission connection with the heat exchange plate; the driving mechanism drives the lower end of the heat exchange plate to move up and down in the cylinder body; and the driving mechanism, the upper temperature sensor, the middle temperature sensor and the lower temperature sensor are electrically connected with the controller. According to the coke oven ascension pipe heat exchanger with the changeable heat exchange area in the invention, the temperature of the raw coke oven gas is reduced and the temperature decrease of the raw coke oven gas is controlled to be 450 DEG C or above.

Description

technical field [0001] The invention relates to the field of riser heat exchangers. More specifically, the present invention relates to a coke oven riser heat exchanger with variable heat area. Background technique [0002] The efficient recovery and utilization of coke oven raw gas waste heat resources generated in the coking process is the main direction of building a resource-saving and environmentally friendly green coking plant for energy conservation, and it is also one of the main ways to reduce coke oven energy consumption. [0003] However, my country's exploration of the quality potential of secondary energy, the development of value, and the development of supporting technologies and equipment for the utilization of low-quality waste heat and waste energy are lagging behind. The waste heat utilization of riser heat exchangers is now a mature and reliable recycling device. However, due to the particularity of coke oven operation during operation, the temperature a...

AI Technical Summary

Problems solved by technology

[0003] 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 lags behind. The waste heat utilization of riser heat exchangers is now a mature and reliable recycling device.

However, due to the particularity of coke oven operation during operation, the temperature and flow of raw gas are changing at any time during the whole process from coal addition to coke pushing. When the riser heat exchanger reduces the temperature of the exchange gas to 450° In the following, a large amount of tar is precipitated on the inner wall of the rising pipe by the raw gas, causing environmental pollution. How to effectively use the raw gas in the rising pipe has become an important issue

[0004] Existing ascending pipe heat exchanger, the heat exchange rate is too large, the ascending pipe emits black smoke, and the environmental protection is not up to standard

Or the heat exchange rate of the coiled riser is too small, which has no economic value

The current technical difficulty is that the temperature of coke oven raw gas slowly decreases with the increase of coke charging time, the highest temperature is 850°C, and the lowest temperature is 650°C

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