Application of U-type three-dimensional heat pipe to energy saving transformation of spinning air conditioning system in acetate fiber plants

The production process of acetate fiber plant has high requirements for the temperature and humidity of the spinning workshop. The spinning air conditioning system needs to be operated continuously all year round. The phenomenon of cold and heat offset exists in the air treatment process for a long time every year, and the energy consumption is high. A method of retrofitting spinning air conditioning system by adding U-type three-dimensional heat pipe is put forward. The existing heat of the system is used to reheat air instead of steam reheat. The calculation results under the condition of reheat temperature rise of 4 ℃ show that the precooling effect of heat pipe reduces the actual cooling capacity of surface cooler by about 28.0%, and the energy saving effect is remarkable.