There are many ways of heat and application of urban sewage, but the most useful application is the application of sewage heat pump. Summer will be the construction of the excess heat within the material released through the heat pump unit to the city sewage, winter heat mention pulled out of the city sewage to be released into the construction material through the heat pump unit. Capital potential of the urban sewage heat first depends on the temperature of the sewage. Through the disposal of urban sewage water temperature throughout the year within the inevitable limitations of change. Two disposal of sewage in winter the water temperature in the 13-16 ° C, such as a sewage disposal plant, summer water temperature at 22-26 ℃.
Ordinary circumstances, the Northern Regional winter uniform sewage water temperature override above the surrounding circumstances temperature 2O ℃, summer sewage water temperature lower than the situation of temperature ten degrees Celsius. Application of wastewater and the temperature difference for heat has a very ambitious energy and capital prospects. Sometimes even the heat exchanger can not be the task. Thus, the water quality of the sewage system characteristics. In addition, sewage various types of harmful ingredients to swap the impact of the erosion of the heat exchanger material and no ready-made materials to follow. These seminars gave sewage heat exchanger under great difficulties.
Effluent quality for the differences. The accepted systematic approach. Accept the information and the way heat exchanger. It still has a good heat transfer functions sewage. These issues are the difficulty of the sewage source heat pump system design. The application of sewage source heat pump system for building material cooling or heating, abundant application of waste heat from municipal sewage, cut the cost of high power. Not only saves power, and cut the capital cost of the situation of pollution and water; In addition, because the efficiency of the sewage source heat pump units task. The engine room covers an area of ​​small size, and greatly reduces operating costs and initial investment costs. Thus sewage has won as a renewable power the air conditioning system for the construction of objects of everyone recognized, and in domestic use is gradually increasing. The heat pump system is certainly a lot of strengths. But because of the extraordinary nature of the sewage. Easily formed bad premise of the heat pump task. Especially tasks premise of the heat exchanger where the heat pump is even worse. When the sewage flows through a heat exchanger, because the sewage composition is very complex. Will form appearance of fouling of the heat exchanger, congestion and even erosion of the scene. Because the existence of these images. Makes the heat exchanger heat transfer efficiency. The activities of the fluid resistance is increased. Reduce the use of the heat exchanger life. Native of the city sewage because of its complex composition. Impurity content, thinking to the sewage heat exchanger, erosion, scaling, and many other elements to corrosion resistance, long life, easy to clean plastic sewage heat exchanger is better; on the use of the secondary effluent of sewage disposal plants or recycled sewage water source heat pump system, the use of recycled water to do the cooling water quality specifications. If the recycled water to reach the response of the water quality specifications, can be used metal heat exchanger, or can be non-metallic class of sewage heat exchanger; of non-metallic heat exchanger, from the price, the heat transfer function and life comprehensive analysis of The proposed PE-x pipe and HDPE pipes as sewage heat exchanger pipe.