Boiler outlet water temperature and flow control

Although the functions of the DCS control system and the centralized control system are not much different, the mechanism is completely different for how to achieve their functions. In the north, the winter is longer and the heating period is longer. Therefore, the heating part of the decentralized boilers is relatively large, and the heating quality plays an important role in saving energy and reducing the environmental pollution of the city. effect.

In the aspect of heat supply, in order to make the user feel comfortable and to save energy, the temperature of the secondary low-temperature water exchanged between the first high-temperature water and the heat exchanging station should be changed according to the change of the external temperature, which requires control. A high-temperature water temperature and flow rate at the boiler outlet.

In terms of controlling combustion, it is not only required that the fuel be fully burned, but also that energy conservation and environmental pollution be reduced. This requires a certain adjustment of the temperature and fuel combustion environment. The former needs to change the fuel supply, it is necessary to control the speed of the grate motor so that the thickness of the coal seam can be changed, and then adjust the temperature; for the latter, It is necessary to maintain a stable oxygen content, and it is required that the negative pressure value is basically stable.

The structure of the boiler control system DCS is composed of many parts, including operator stations, field control stations, engineer stations, actuators, on-site inspection instruments, etc. It has system functions such as detection, air supply automatic control, instrument panel, and data display. The DCS control system can detect many indicators, including boiler outlet pressure, boiler outlet temperature, boiler discharge flow, and smoke oxygen content.