Because there is no final stage cooler in some domestic air compressors, the exhaust temperature is generally above 100 degrees, and the high temperature can even reach 130 ~ 140 ℃. This part of high-temperature air flow in pipes in the workshop. 1. The workshop environment temperature rises, which is unfavorable to the operation of the machine, and there are potential safety hazards. 2. Increase the load of the conventional air cooling column and increase the energy consumption.
If this part of air heat is utilized, it will be a lot of wealth, which can not only benefit employees, but also save energy for unit. Some domestic oxygen stations have very practical examples, which are to use this part of the heat of the air to recover the heat by preheating the regeneration gas, so as to achieve the purpose of energy saving. After telephone consultation, the 1000Nm³/H air separation units of a domestic unit use part of the air heat energy to heat the regeneration gas. The air temperature is 150 ℃, and the regeneration gas can be heated to 95 ℃, achieving the purpose of energy saving. In Laiwu construction site project of DEAR, the air exhaust thermometer shows that it is constant above 120 ℃. If it can be used, it will save energy for long-term operation and save a lot of money. The key is to lower the ambient temperature of the workshop. According to the preliminary estimation, if the crude nitrogen can be heated to 65 ℃, 1039 ℃ electricity can be saved every day. As for the problem of resistance, the two large manual stop valves at the outlet of the air compressor have a resistance of about 13KPA, which is too large and has not been used since starting up. If the valve is not replaced by a heat exchanger, there is no problem at all.
