Основы эксплуатации систем теплоснабжения. Испытание, промывка и пуск теплосетей

Diagram of heating network equipment for flushing

When laying underground on the pipeline to be flushed, at the ends of the sections along the direction of water movement, mud traps are installed in the sections of the sectional valves. Here, between the supply and return pipelines, a jumper with a diameter equal to 0.3 of the pipeline diameter is inserted, with two valves and a control valve between them. The speed of water movement is 1.0 – 1.5 m/s. The duration of washing is up to 20 - 30 hours. At the end of washing, the mud traps are cleaned or cut out. The best effect is achieved by the hydropneumatic method of washing networks. Air is supplied to the pipeline filled with water by a compressor, creating increased turbulence of the flow and, as a result, better removal of mechanical particles.

• When laying underground on the pipeline to be flushed, at the ends of the sections along the direction of water movement, mud traps are installed in the sections of the sectional valves. Here, between the supply and return pipelines, a jumper with a diameter equal to 0.3 of the pipeline diameter is inserted, with two valves and a control valve between them. The speed of water movement is 1.0 – 1.5 m/s. The duration of washing is up to 20 - 30 hours. At the end of washing, the mud traps are cleaned or cut out. The best effect is achieved by the hydropneumatic method of washing networks. Air is supplied to the pipeline filled with water by a compressor, creating increased turbulence of the flow and, as a result, better removal of mechanical particles.

Hydropneumatic flushing sequence:

Hydropneumatic flushing sequence:

• - at the highest points, pipes with shut-off valves and check valves are inserted, to which the compressor and water supply are connected;
• - pipes are filled with water of incomplete cross-section with the air and drain valves closed;
• - the compressor creates a pressure of up to 0.3 MPa, turn on the water supply and drainage line at the lowest points;
• - washing is carried out until the water clarifies, the washing speed is 1.5 -3.0 m/s.