Low-temperature waste heat recovering device

Abstract

The invention discloses a low-temperature waste heat recovering device. The low-temperature waste heat recovering device comprises an outer barrel; an inner barrel is arranged in the outer barrel; a rotating barrel is arranged between the inner barrel and the outer barrel and is connected with a rotating driving mechanism; a waste hot water channel is formed between the outer barrel and the rotating barrel; a waste hot water inlet is formed in the upper part of the outer barrel; a waste hot water outlet is formed in the lower part of the outer barrel; a warm water channel is formed between therotating barrel and the inner barrel; warm water discharge holes are formed in the upper part of the rotating barrel; a warm water collector is arranged outside the warm water discharge holes; a warmwater outlet is formed in the warm water collector; a cold water pipe is vertically arranged on the inner barrel; the upper part of the cold water pipe penetrates out of the rotating barrel; a cold water channel is formed in the cold water pipe; a cold water inlet is formed in the upper end of the cold water pipe; and cold water discharge holes are formed in the lower part of the cold water pipeand communicate with the warm water channel. The low-temperature waste heat recovering device has the advantages of simple structure, convenience in fabrication, and high heat exchange efficiency.

Description

technical field [0001] The invention relates to the technical field of waste heat recovery, in particular to a low-temperature waste heat recovery device. Background technique [0002] A large amount of waste hot water in bathing centers, hot springs, washing plants, printing and dyeing plants, etc., is usually discharged directly due to its low temperature, many impurities, and difficulty in recycling, which will not only cause a lot of energy waste, At the same time, it will cause serious pollution to the environment. [0003] Traditional waste heat recovery heat exchangers mainly have two forms, namely plate heat exchangers and spiral plate heat exchangers; however, both plate heat exchangers and spiral plate heat exchangers are composed of layers The corrugated metal plates are stacked, and the heat exchange is completed during the reverse flow of cold water and hot water. In order to increase the heat exchange area and improve the heat exchange efficiency, the distance...

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Problems solved by technology

[0002] A large amount of waste hot water in bathing centers, hot springs, washing plants, printing and dyeing plants, etc., is usually discharged directly due to its low temperature, many impurities, and difficulty in recycling, which will not only cause a lot of energy waste, At the same time, it will also cause serious pollution to the environment

[0003] Traditional waste heat recovery heat exchangers mainly have two forms, namely plate heat exchangers and spiral plate heat exchangers; however, both plate heat exchangers and spiral plate heat exchangers are composed of layers The corrugated metal plates are stacked, and the heat exchange is completed during the reverse flow of cold water and hot water. In order to increase the heat exchange area and improve the heat exchange efficiency, the distance between the plates is small, which is easy to cause blockage and high maintenance costs; in addition, the driving force of heat exchange From the temperature difference between cold and hot water, the temperature of the above-mentioned wastewater is low, and the existing heat exchanger cannot recover and reuse the waste heat well; therefore, its structure needs to be further improved

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