彩涂板机组所需热力设施的特点和作用

Heat exchangers such as pre-cleaning water tank, scrubbing water tank, alkali washing water tank and rinsing tank are generally installed in the process section of the unit. They all need heat media. At present, steam, high temperature flue gas and heat conducting oil are commonly used in domestic production lines. The characteristics of these three heat sources are described below.

 

 

(1) Water vapor. Water vapor is liquefied by condensation, releasing a large amount of latent heat of vaporization, which has a very good heat transfer effect. Water vapor liquefied into condensate water can be recycled to the boiler room for reuse. Steam is usually produced by steam boiler. This method is widely used because of its low investment and simple heat exchange equipment.

 

 

(2) High temperature flue gas. The high temperature flue gas discharged from other production lines is recycled to heat the heat exchanger. The heating efficiency of this method is relatively high, but the heat balance plan of the whole plant area should be done well in advance, and the potential of waste heat utilization should be actively developed.

 

 

(3) Heat conducting oil. The heating of heat conducting oil is that the heater heates the heat conducting oil, enters the heat exchanger through the oil tube, releases heat, and then returns to the heater to be heated. The whole system is a closed-loop system with no loss of medium and good heat transfer effect. However, due to the high cost of the system, it is seldom used in China.