Based on the requirements of the control system of the heat exchange station and the characteristics of the Trust PLC CTSC-200 series PLC, this article focuses on the application program of the TrustPLC CTSC-200 series PLC in the heat exchange station control system.
First, introduction of heat exchange station system
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The heat exchange station is mainly composed of a heat exchanger, a circulating pump unit, a make-up water pump unit, a sensor instrument, a regulating valve, a PLC control cabinet, and the like.
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The working principle of the heat exchange station: The water supply of the primary pipe network enters the heat exchanger of the unit by its own pressure and returns to the thermal power plant or the boiler house after heat exchange. After the secondary pipe network return water is filtered, the circulation pump enters the heat exchanger and is heated by steam or high temperature water to provide the user with the required hot water. The make-up pump will drive the soft water change into the system to supplement the amount of water lost during system operation and maintain the system pressure through frequency control. CTSC-200 series PLC automatic control system mainly completes the following functions:
1. Measure the temperature, pressure and flow of the first-level pipe network water supply and the first-grade pipe network return water;
2ã€Measurement of temperature, pressure and flow of secondary pipe network water supply and secondary pipe network return water;
3, by controlling the flow of the first-class pipe network water supply, ensure that the water supply temperature of the secondary pipe network is constant or the return water temperature difference is constant;
4, through the frequency control of the circulation pump and make up the pump, to ensure that the secondary pipe network water supply pressure is constant or the water pressure difference is constant;
Second, configuration scheme:
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Control system diagram:
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Third, summary
1. The automatic operation of the heat exchange station system was realized using the Shenzhen Accreditation CTSC-200 series PLC, giving full play to the advantages of frequency converter speed regulation and energy saving.
2. TrustPLC CTSC-200 series PLC module has many advantages such as large number of points, flexible configuration, reliable control, and convenient programming, so that the stability of the entire system has a reliable guarantee.
3. TrustPLC CTSC-200 series PLC is used to control the operation of the heating network reasonably. The misalignment phenomenon has been effectively solved and the phenomenon of uneven heating and cooling in the stations of the heating network has been eliminated. On-demand heating, energy saving and consumption reduction have changed the unreasonable small temperature difference and large flow operation mode, which not only ensures the remote customer's heating needs but also avoids the near-end user's overheating and directly improves the heating effect of the heating network.
The heat exchange station is mainly composed of a heat exchanger, a circulating pump unit, a make-up water pump unit, a sensor instrument, a regulating valve, a PLC control cabinet, and the like.
The working principle of the heat exchange station: The water supply of the primary pipe network enters the heat exchanger of the unit by its own pressure and returns to the thermal power plant or the boiler house after heat exchange. After the secondary pipe network return water is filtered, the circulation pump enters the heat exchanger and is heated by steam or high temperature water to provide the user with the required hot water. The make-up pump will drive the soft water change into the system to supplement the amount of water lost during system operation and maintain the system pressure through frequency control. CTSC-200 series PLC automatic control system mainly completes the following functions:
1. Measure the temperature, pressure and flow of the first-level pipe network water supply and the first-grade pipe network return water;
2ã€Measurement of temperature, pressure and flow of secondary pipe network water supply and secondary pipe network return water;
3, by controlling the flow of the first-class pipe network water supply, ensure that the water supply temperature of the secondary pipe network is constant or the return water temperature difference is constant;
4, through the frequency control of the circulation pump and make up the pump, to ensure that the secondary pipe network water supply pressure is constant or the water pressure difference is constant;
Second, configuration scheme:
Control system diagram:
Third, summary
1. The automatic operation of the heat exchange station system was realized using the Shenzhen Accreditation CTSC-200 series PLC, giving full play to the advantages of frequency converter speed regulation and energy saving.
2. TrustPLC CTSC-200 series PLC module has many advantages such as large number of points, flexible configuration, reliable control, and convenient programming, so that the stability of the entire system has a reliable guarantee.
3. TrustPLC CTSC-200 series PLC is used to control the operation of the heating network reasonably. The misalignment phenomenon has been effectively solved and the phenomenon of uneven heating and cooling in the stations of the heating network has been eliminated. On-demand heating, energy saving and consumption reduction have changed the unreasonable small temperature difference and large flow operation mode, which not only ensures the remote customer's heating needs but also avoids the near-end user's overheating and directly improves the heating effect of the heating network.