A system and method for recovering multiple industrial waste heat at the same time

Abstract

The invention relates to a system and method for recovering multiple industrial waste heat at the same time. Pipes, pipes for waste heat medium entering heat exchange devices, pipes for waste heat medium exiting heat exchange devices, heat metering devices, heat supply water pipes for heat exchange devices, heat supply water outlet pipes for heat exchange devices; main water supply pipes for heating systems and several heating systems The system water supply branch pipe is connected, the main return water pipe of the heating system is connected with several heating system return water branch pipes; the water supply branch pipe of the heating system and the heating system return water branch pipe are connected in sequence from the main water supply pipe of the heating system to the direction away from the bypass pipe , heating users, non-heating heat users. The advantage is that it realizes the recovery and utilization of various medium and low temperature waste heat in summer, and solves the heat demand problem of non-heating heat users in summer.

Description

technical field [0001] The invention relates to a system and method for simultaneously recovering various industrial waste heat. Background technique [0002] Power plants, iron and steel plants, petroleum, chemical, building materials, light industry and food industries and other industrial enterprises have a large amount of low-grade waste heat in the production process, including power plant exhaust steam waste heat, blast furnace slag flushing water waste heat, flue gas waste heat, and cooling medium waste heat etc., is considered the fifth largest conventional energy source after coal, oil, natural gas and hydropower. [0003] At present, this part of low-temperature waste heat in China is mainly used in winter heating, domestic hot water heating, heat pump heating / cooling, seawater desalination and waste heat power generation and other fields. In summer, due to the dispersion of users who need heat, it is not worth the loss to establish pipeline connections alone. Thi...

AI Technical Summary

Problems solved by technology

The system points out that the waste heat of slag washing water can be used for refrigeration, dehumidification and blasting, etc., but it does not solve the system and control problems that the slag washing water is applied to more users in summer, and the waste heat of slag washing water in summer still cannot be recycled smoothly.

[0007] To sum up, the recovery and utilization of this part of the medium and low temperature waste heat in various industrial enterprises is narrow, and the recycling is severely restricted by seasonal conditions, which reduces the recovery rate of this part of the medium and low temperature waste heat, especially in summer.

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