Operation switching adjusting device for heat exchangers and circulating pumps of heat exchange station and working method

Abstract

The invention discloses an operation switching adjusting device for heat exchangers and circulating pumps of a heat exchange station and a working method. The device comprises a control module, a heat exchange station water inlet manifold water temperature sensor, heat exchanger primary water outlet pipe water temperature sensors, heat exchanger primary water inlet pipe electric control valves, heat exchanger secondary water outlet pipe water temperature sensors, check valves, circulating pump frequency conversion speed regulators, a water distributor water temperature sensor, a water collector water temperature sensor, a water distributor and collector pressure difference sensor and heat exchanger secondary water return pipe electromagnetic valves. The logarithmic mean temperature difference is introduced to quantitatively describe the heat exchange capacity of the heat exchangers, and the logarithmic mean temperature difference of the heat exchangers is used as a criterion when the heat exchangers are increased or decreased. By taking the opening degree of an electric control valve, the frequency of the circulating pumps, the water supply temperature, the pressure difference and the keeping time of the parameters as criteria, the equipment operation switching working method of the heat exchange station with two typical structures of 'first series connection and then parallel connection' and 'first parallel connection and then series connection' of the heat exchangers and the circulating pumps is provided, and the heat supply amount adjusting range of the heat exchange station can be effectively widened.

Description

technical field [0001] The invention relates to district heating technology, in particular to a device and working method for switching and regulating the operation of a heat exchanger and a circulation pump in a heat exchange station. [0002] technical background [0003] The district heating system is the main heating technology for buildings in urban areas in northern my country. Although clean energy such as air energy, geothermal energy, and solar energy are gradually used to generate heat from heat sources, the district heating system in my country is still dominated by fossil fuels, which will cause Greater environmental pollution and operating energy consumption. Among them, improving the control level of the district heating system is a key technology to improve operating efficiency and reduce energy consumption. In the district heating system, the heat exchange station is an important hub connecting the heat source and the building. Through the heat exchange betwee...

AI Technical Summary

Problems solved by technology

This means that the number of openings of the internal equipment of the heat exchange station is staged, resulting in a small adjustment range for the heat supply of the heat exchange station

This manual adjustment method cannot dynamically and accurately match the heat supply and heat demand. When the opening of the electric control valve on the primary side of the heat exchanger or the frequency of the circulating pump on the secondary side reach extreme values, the water supply temperature and flow rate still cannot reach the set value. , will lead to excess or insufficient heat supply of the heat exchange station

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