The main causes of plate heat exchanger breakdown

Plate heat exchanger is composed of a corrugated metal sheet is composed of four corner hole plate, two kinds of liquid for heat transfer through direct fluid alternately flows through their respective channels, heat exchange, plate heat exchanger arranged closely, high precision, small volume, high heat efficiency, save space the use of higher environmental requirements, suitable for use in small refrigeration unit. General air conditioning equipment in normal maintenance can be used for 15 to 20 years. But the customer will ask us why: plate heat exchanger will be breakdown? Today swep is simple for everyone on the following three points:

1, construction problems: the system is only equipped with filters, not installed electronic water treatment device, so it is difficult to ensure that the pipeline system does not scale. In addition, if the filter is not cleaned in a timely manner, so that the residual water in the loop, even if the shell and tube heat exchanger is not harmful to the formation of small gravel, but the plate heat exchanger plate wear and tear hazards.

2, quality problems: compared with other heat exchanger surface heat exchanger plate heat exchanger surface is very thin, that is, 0.5mm, the maximum allowable corrosion of 0.05mm/ years. Ordinary plate heat exchanger material usually uses alloy material (304 or 316), the austenitic stainless steel is one of the lowest in 304, for a certain range of organic matter has the ability to resist corruption, but the ability to resist hydrochloric acid and sulfuric acid is weak. The main engine of the heat exchanger plate material is 304, then used in the next 8 years, the plate will breakdown, corrosion is inevitable.

3, maintenance problems: plate heat exchanger is an important component in the process of heat exchange equipment. The plate heat exchanger gasket which is sealed between the plate heat radiating fins is a wearing part, and is also an aging part under the natural condition. Its service life has an important influence on the service life of plate heat exchanger. If these seals hardened, lost the original elasticity, and there is no time to re tighten or replace, the heat exchanger can be caused by the appearance of drip. Plate heat exchanger in the long run, need to be cleaned regularly, usually two years clean. Now can heat exchanger apart a piece alone clean, but some heat exchanger is not able to open, can only rely on the open heat exchanger inlet and outlet pipe on the valve and plug to clean, so the heat exchanger is difficult to clean, it is simple blocking and scaling, once there was a part of the heat exchanger the channel is blocked, other channels have to accept all the units in the flow of water, which flows through the heat exchanger, the velocity increases and the friction force is added, the wear is added immediately.