The 5 principles for cleaning heat exchangers

The flue gas heater is one of the important equipment in the wet flue gas desulfurization system

The flue gas heater (H) is one of the important equipment in the wet flue gas desulfurization system. Its main effect is to transfer heat from the original flue gas to the purified flue gas after desulfurization, to ensure that it is heated to the emission temperature that meets environmental requirements, so as to reduce pollutant emission limits and prevent chimney corrosion. In fact, before the use of polymer materials such as Teflon and Alwaflon, the industry had tried metal materials such as ordinary carbon steel, ND steel, and nickel based alloys, which would suffer from various corrosion conditions during use and incur high maintenance costs.

The deformation and misalignment of the board caused the pad to run. There are cracks in the sealing groove or secondary sealing area of the plate. The treatment method for external leakage in plate heat exchangers: 1. In a state of no pressure, re clamp the equipment according to the clamping size provided by the founding factory. The size should be uniform and similar, and the error in the clamping size should not exceed ± 0.2N (mm) (N is the total number of plates). The parallelism between the two clamping plates should be maintained within 2mm. 2. Mark the leakage area, then disassemble the heat exchanger and inspect and treat it one by one, and reinstall or replace the gasket and plate. How to choose the material for the sealing gasket of a plate heat exchanger in Anyang? The sealing gasket of a plate heat exchanger is a circular ring made of materials that can produce plastic deformation and have relative strength, and is one of the primary components of a plate heat exchanger.

The 5 principles for cleaning heat exchangers: Generally, the cleaning of heat exchangers should be based on the fouling condition. When the heat exchange efficiency cannot meet the process design requirements, cleaning is necessary. From the perspective of energy conservation and consumption reduction, if 0.2-2 millimeters of scale is attached to the heat transfer surface of a plate heat exchanger, it will shorten the heat transfer efficiency by 10-40%. 0.3 millimeters of silicon scale will shorten the heat transfer efficiency of the heat exchanger by 90%.

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