Continuous casting machine waste heat recovery method and recovery system

Abstract

The present invention proposes a waste heat recovery method of continuous casting machine, which is used to solve the problems of high operating pressure caused by direct heating of soft water in the prior art, great damage to equipment and low quality of water vapor obtained, which cannot be effectively converted and utilized. The heat conduction medium captures and absorbs the heat from the continuous casting machine site, and then exchanges heat between water and high-temperature non-water heat conduction medium, and finally obtains high-temperature and high-pressure water vapor that can be converted and utilized. In addition, a continuous casting machine waste heat recovery system is also proposed, including the following devices: heat collection device, boiler heat exchange device, water storage heat storage device and application system, boiler heat exchange device includes heat exchange chamber and steam chamber, heat exchange A first heat exchanger is arranged indoors; the heat collection device is connected to the first heat exchanger, and the steam chamber is respectively connected to the water and heat storage device and the application system. This method does not require a soft water preparation device, and the non-water heat-conducting medium does not generate air resistance when it operates at low pressure, and the obtained water vapor is stable and of high quality, which can meet the requirements of power generation.

Description

technical field [0001] The invention relates to the technical field of the metallurgical industry, in particular to a recovery method and recovery system for waste heat of a continuous casting machine. Background technique [0002] In today's energy shortage, energy conservation, consumption reduction, and emission reduction are urgent problems for all enterprises, especially the iron and steel industry with high energy consumption and high cost. At present, when most iron and steel enterprises produce billets, a series of equipment in continuous steel casting, that is, continuous casting machines, are mostly exposed in the workshop, and are cooled by traditional methods such as radiation, heat transfer or water pumping, without any shelter or waste heat recovery measures. . As an energy release body, the continuous casting machine can reach a temperature of up to 1500-1600°C when smelting molten steel, and the casting temperature is generally around 700-800°C or even lower...

AI Technical Summary

Problems solved by technology

However, there are the following problems in the technology using soft water for direct heating: (1) the operating pressure is high and it is easy to leak; (2) when the water vaporizes, it is easy to form air resistance at the outlet of the elbow pipe, causing local overheating damage; (3) soft water is required The preparation device has soft water loss; (4) the water vapor produced is low-quality water vapor, which is difficult to convert into usable energy

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