Energy-saving cooling method

Abstract

An energy-saving cooling method is characterized by using a combined device including an air-cooled heat exchanger and a water-cooled heat exchanger which are respectively connected with a bypass valve in parallel. The combined device can select different cooling manners, such as full water cooling, air cooling and water cooling or full air cooling, can be selected for materials according to different ambient temperatures. In summer, the materials are cooled by the air-cooled heat exchanger firstly; when the materials are cooled to 50 DEG C, the water-cooled heat exchanger is connected to cool the materials to the desired temperature. In winter, the water-cooled heat exchanger is turned off; the materials can be cooled to the desired temperature meeting the production requirements by only using the air-cooled heat exchanger. The energy-saving cooling method provided by the invention is suitable for the boreal climate, has low energy consumption, can realize continuous production and can control temperature. The energy-saving cooling method provided by the invention overcomes the disadvantages of the conventional polycrystalline silicon material heat exchanger, such as high energy consumption, easy to block by scaling, easy to corrode and leak, difficult to maintain, and difficult to control temperature.

Description

technical field [0001] The invention relates to the field of comprehensive utilization of heat energy of heat exchangers, in particular to an energy-saving cooling method. Background technique [0002] The winter in northern China is long and the ambient temperature is low. Because the chemical industry, especially the polysilicon industry, needs to consume a large amount of cooling water for cooling in the whole process of its production. In order to respond to the national requirements for energy conservation and emission reduction, various polysilicon enterprises are constantly pursuing or developing new technologies to reduce the production cost of the improved Siemens method and narrow the gap in energy utilization with international advanced manufacturers. How to reduce energy consumption in the production process has become a topic that polysilicon enterprises pay more and more attention to. In the production of polysilicon, processes such as purification and tail g...

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Problems solved by technology

[0003] The object of the present invention is to provide an energy-saving cooling method, suitable for northern climate conditions, low energy consumption, capable of continuous production of polysilicon materials, energy-saving and consumption-reducing cooling method with adjustable temperature, which can prolong the running time of the system; Polysilicon material heat exchangers have high energy consumption, easy scaling and blockage, easy corrosion and leakage, difficult inspection and maintenance, and difficult temperature control

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