Summarize the use requirements and design process of waste heat boiler

　　Common waste heat boilers mainly use their flue pipes to exchange heat during use. The temperature of the metal heating surface of the equipment is very low and the temperature of the hot fluid discharge will be roughly in a multiple relationship. If the metal heating surface of the equipment is heated When the temperature request is not lower than 150 degrees, the temperature of the rest of the exhaust smoke should not be lower than 300 degrees under normal circumstances.

　　The waste heat boiler operates under very low temperature conditions. When used, the safety factor is 1.5 times for calculation. The exhaust gas temperature of the equipment needs to be no less than 450 degrees. At this time, the waste heat boiler can recover about 0.5 tons of heat. The recovery of the entire equipment The efficiency is still relatively low.

　　The temperature at this time is just to check the temperature during use. When the operating conditions need to stop adjustment due to the operation requirements, there is no way to directly stop the adjustment and control of the wall temperature.

　　When the temperature of the metal wall surface of the tail heating surface of the waste heat boiler is lower than the condensation point of its sulfuric acid vapor, it will form liquid sulfuric acid on its surface during use, so that for a long time, the heating surface of the tail of the heat exchange equipment has been caused by condensation. Corrosion often occurs.

　　In the process of designing, it is necessary to improve the smoke temperature or use non-metallic materials with poor heat transfer to alleviate the occurrence of condensation and corrosion. The problem is still not basically solved during use. Waste heat boilers often After one to two years of operation, it will show corrosion until it is perforated.

　　The heat pipe of the waste heat boiler is vacuum, and the fluid resistance is very small during use. The distance between the inner and outer layers of the annular heat pipe of the equipment is only 10 mm, so the heat transfer speed of the equipment is very fast, and a large amount of heat energy passes through its small cross section. Long-distance transmission without any additional power.