1.          Through the plate heat exchanger geothermal heat energy utilization system can be divided into ー water, secondary water system, ensure reliable geothermal facilities, implement security heating. A deep geothermal water quality good, corrosive small geothermal water is very rare, due to the low temperature geothermal water can't heating, so often need to drill Wells, deep Wells geothermal water water quality composition of corrosion is most often in gas (cr door and dissolved oxygen (O2). Chlorine has a small out-of-home radius and strong penetration ability, so it is easy to cross through the existing protective layer on the metal surface and cause crack corrosion, hole corrosion and stress corrosion on carbon steel, non-pound steel and other alloys. In China, geothermal water extracted from ground K bedrock is generally more than 300mgL in terms of gas ion content, which is highly corrosive.

2.          The cascade utilization of geothermal heat energy is realized through plate heat exchanger. The capacity of geothermal heating is related to the water output of geothermal Wells, the water temperature and the discharge water temperature after use. When the water output and water temperature of the geothermal well are determined after the completion of the well, the discharge water temperature is related to the heating mode of the user. If the heating equipment is a radiator, the water temperature of the geothermal discharge is about 40T; if the water temperature of the geothermal well is 7 (TC), the temperature difference of the available geothermal energy is about 30T. Recently, in order to make full use of the low-grade heat energy in the temperature section below 40, many geothermal development companies have adopted heat pump units to provide heat and reasonably reduce the discharge temperature of tail water. It can be seen from the built project that the tailwater discharge temperature can reach 17 yau, and the geothermal usable temperature difference reaches 531 at this time, and the utilization rate of geothermal energy is increased by about 1.7-1.8, it increases geothermal heating capacity. In addition to the heat pump unit, plate heat exchanger is one of the key equipment of this system.