Compressed Air Upgrade for District Heating
As a regional centralized heating system operator, the company's pneumatic valves and instruments at the heating stations require an all-weather stable supply of compressed air. During the peak heating period in winter, it is necessary to maintain a continuous output at a working pressure of 0.8 MPa, while also adapting to the long-distance pipeline transmission losses caused by the dispersed layout of the heating stations.
As a regional centralized heating system operator, the company's pneumatic valves and instruments at the heating stations require an all-weather stable supply of compressed air. During the peak heating period in winter, it is necessary to maintain a continuous output at a working pressure of 0.8 MPa, while also adapting to the long-distance pipeline transmission losses caused by the dispersed layout of the heating stations.
Project Implementation and Operating Results
As a regional centralized heating system operator, the company's pneumatic valves and instruments at the heating stations require an all-weather stable supply of compressed air. During the peak heating period in winter, it is necessary to maintain a continuous output at a working pressure of 0.8 MPa, while also adapting to the long-distance pipeline transmission losses caused by the dispersed layout of the heating stations.
Technical adaptation
BOSAN deploys the LDPMII screw air compressor solution. The equipment uses a heavy-duty air end design to cope with the low-temperature environment in the north, and the drainage pipeline needs to be insulated and protected against freezing according to local low-temperature conditions. The three-stage air-oil separation technology controls the oil content to below 3 ppm, meeting the special air cleanliness requirements of the thermal system. The variable-speed control system can automatically adjust the output according to the air demand of the more than 30 heat exchange stations.
Value realization
The original data recorded a decrease in the amplitude of pressure fluctuations 70%, but did not distinguish between thermal network water pressure and compressed air pressure, so this indicator is not considered a confirmed effect of the compressed-air supply system. The renovation focuses on improving compressed-air supply to end pneumatic valves and instruments; cavitation of circulating pumps requires separate verification of hydraulic conditions. Compared to the original equipment, the annual maintenance frequency has decreased 40%, and its box-type silent design has reduced the heat station noise from 85 decibels to below 65 decibels. The IoT interface reserved on the equipment has already been connected to the customer’s intelligent heating management platform, laying the foundation for the subsequent construction of a digital twin system.
The figures apply to this project and its specific operating conditions, not guaranteed results for other projects or the entire product series. Configuration and performance are subject to the project technical agreement.