The role of heat exchange stations in the heat supply system and the current shortcomings of heat exchange stations
Heat exchanger station centralised heat supply system in an important part. The role of the heat exchange station is the heat exchange station is the system heat supply network and heat users connected to the place. It is the heat source and heat source sent to the destination of the intermediate links. Heat transfer station determines the quality of heat supply, but also to improve the heat network system of thermal conditions, as well as improve the quality of heat supply network system plays a very important role. At present, China's centralised heat supply areas, the common shortcomings of the heat transfer station is: heat transfer station energy consumption is serious, the station's circulating pumps and make-up pumps output flow, can not be based on changes in the heating load and the pressure of the network changes and automatically adjust the output flow. The temperature of the secondary water supply after output cannot fully meet the standard of heating. The lack of modern high-tech data transmission and communication equipment makes the data transmission rate of the heat exchange station slow and unstable.
energy saving measures in a heat exchange station
(1) The waste of energy in the heat exchange station is due to the shortcomings of the heat exchange station, mainly because of the serious energy consumption. This is because the equipment in the station is not matched with the equipment in the boiler room, some heat exchange stations are added later or secondary heat exchange stations, so that due to the construction time is not synchronised with the boiler room, so it is not possible to install equipment that matches exactly with the boiler room, or the design of the heat exchange station is unreasonable, lack of scientific calculations, and there are errors in the data. On the other hand, the equipment in the heat exchanger station is outdated and cannot adapt to the increasing heating area, and the quality of heat supply cannot be guaranteed. Measures should be taken to carry out reasonable design or renovation of the heat exchange station, so that the equipment adapted to the heat exchange station can match the equipment in the boiler room as far as possible, and minimise the waste caused by the mismatch of equipment;
(2) The output of the circulating pumps and make-up pumps in the heat exchange station cannot change with the heating load, nor can it change with the pressure of the pipeline. This results in insufficient output of hot water when the heating load increases, and the quality of heating cannot reach the standard and the heating temperature is low. And when the heating load is less, the output of hot water is too much, resulting in waste of heat energy, increased pipeline pressure, and even cause pipe burst phenomenon. A large amount of energy is wasted. Measures should be taken is to use automatic adjustment pump, to control and adjust the circulation pump and make-up water pump output hot water flow. According to the adjustment of the heating load and pipeline pressure changes and automatically adjust the output of hot water, not only to ensure the quality of heating and reasonable use of energy, reduce the waste of thermal energy. It also ensures the quality of heat supply;
(3) Due to the lack of modern control system, the data transmission of the heat exchange station is not smooth, so that the data display of heat supply and its feedback information is not timely, and the waste caused. Measures should be taken to introduce modern control system, scientific and reasonable control of hot water output in the heat exchanger station, and water replenishment, timely grasp of the heating data and heating information, to ensure the quality of heat supply and reasonable energy saving.
Adoption of energy-saving equipment to reduce energy consumption
(1) in the central heating system, to reduce the waste of energy, reduce energy consumption. First of all to be in the design of the heating system, it is necessary to strict calculations and repeated verification, must be all the heating equipment and boiler room equipment as well as heat exchangers are perfectly matched. Secondly, in the operation after the commissioning, must choose the scientific and reasonable system of circulating water volume, try to reduce the resistance loss. Inside the boiler room should try to eliminate unnecessary check valves, in order to reduce the resistance of the water cycle and heat loss, boiler inlet pipe and outlet pipe as much as possible using a large diameter to reduce the resistance of the water cycle and the loss caused by the resistance;
(2) control the quality of circulating water. The circulating water in the heating system should be supplied in accordance with the standard, to meet the water quality standards for boiler water, and also to ensure the alkalinity of the circulating water. Keep its PH value in the range of 10-12, to ensure the quality of circulating water, can prevent the supply pipeline network system scaling, to maintain the alkalinity of the water can prevent the furnace tube rust, so as to improve the thermal efficiency of the boiler, and to maintain the alkalinity of the circulating water so that the water circulation resistance is reduced, but also reduces the loss of circulating water resistance;
(3) Comprehensive balance adjustment measures for heat supply system. Ensure the quality of heat supply, not only to ensure the temperature of the secondary output hot water for heating. It is also necessary to ensure the balanced heating quality of the user. Avoid the generation of imbalance phenomenon of user cooling and heating. To ensure balanced heat supply, the balance of the heat network regulation is a crucial link. Centralised heat supply heat network system has a huge distribution range, the first and the end of the heat network heating parameters are bound to change, the output of heat energy time will also vary greatly, so the heat network data acquisition, transmission, processing, regulation and control of complexity and difficulty will also increase. Traditional control methods can not keep up with the needs of the load changes, with the development of modern computer technology and communications technology, so that the realization of the heat network balance regulation has a technical basis, heating enterprises to continue to explore the application of new technologies, new processes, so that the heating system on-demand heating as much as possible to maximise the energy savings, to complete the heating energy-saving goals.
