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Plate heat exchanger: what problems should be paid attention to when using in the heating system

Views:3     Author:Site Editor     Publish Time: 2020-11-16      Origin:Site

Plate heat exchangers have developed rapidly in the field of central heating in our country, and are widely used in heating systems. Even so, there are still many problems to be solved. For example, the following issues should be paid attention to when the plate exchanger is used in the heating system, so as to better help you use this equipment.

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Plate heat exchangers purchased should have a product certificate, and the clamping size during assembly or reinstallation should meet the nameplate requirements. After the installation is completed, the hydraulic test shall be carried out alternately on both sides. The test pressure is 1.25 times the design pressure, and the water temperature is not lower than 5℃. Maintain for 30 minutes. Check that there is no leakage in each part as qualified.

The inlet and outlet should be installed with elbows during installation to reduce temperature stress. Pressure gauges and thermometers should be installed at the inlet and outlet of fluid on both sides. In order to observe its working conditions. When the pipe network water enters the heat exchange station, it should enter the decontamination device first, and there should be a filter before it enters the plate exchanger. The pipe network should be cleaned before it is put into operation. In order to facilitate repair and adjustment of temperature and flow, there should be bypass pipes for the fluid on both sides of the plate heat exchanger. The heat exchange medium should be treated to prevent the heat transfer performance from degrading too quickly, or even blocking and not working properly.

When the heating medium is steam, the cold fluid should first enter the heat exchanger and enter the normal circulation state before entering the steam. When power failure or shutdown, the hot fluid side inlet valve should be closed first, and then the cold fluid side valve should be closed. In order to prevent the plate heat exchanger from overheating, the steam inlet is equipped with a solenoid valve that can be automatically closed.

When the board changer is not in use, the water should be cleaned and the clamping bolts should be loosened. When using, tighten it to the specified size. The scale of the plate can be cleaned with carbonic acid solution or with a brown brush, but a wire brush cannot be used.

The article introduces in detail several issues that need our attention in the use of plate heat exchangers. As long as the characteristics of the plate heat exchanger can be fully considered in the design, operation and management, so that its excellent performance can be fully utilized, then its It can play a greater role in the heating system.

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