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Anti freezing protection method of plate heat exchanger

Anti freezing protection method of plate heat exchanger

2022-08-26

Anti freezing protection method of plate heat exchanger

How does the condenser work?

How does the condenser work?

2022-08-26

The working principle of the condenser is that the gas passes through a long tube to let the heat escape to the surrounding air. Metals such as copper have strong thermal conductivity and are often used to transport steam. In order to improve the efficiency of the condenser, heat sinks with excellent heat conduction performance are often attached to the pipes to increase the heat dissipation area to accelerate heat dissipation, and air convection is accelerated through the fan to take away heat. The refrigeration principle of the refrigerator is that the compressor compresses the working medium from low temperature and low pressure gas to high temperature and high pressure gas, and then condenses it into a medium temperature and high pressure liquid through the condenser. After throttling by the throttle valve, it becomes a low temperature and low pressure liquid. The liquid substance with low temperature and pressure is sent to the evaporator, where it absorbs heat and evaporates to become the steam with low temperature and pressure, and then is sent to the compressor again to complete the refrigeration cycle.

Specific cleaning steps of brazed plate heat exchanger

Specific cleaning steps of brazed plate heat exchanger

2022-08-26

Cleaning and scaling of brazed plate heat exchanger is troublesome. After all, scaling will inevitably occur inside the exchanger as it is used for a long time, resulting in poor thermal conductivity, thus reducing the exchange efficiency and heat energy. Therefore, it is necessary for everyone to understand the cleaning of brazed plate heat exchanger

Common faults of plate heat exchanger

Common faults of plate heat exchanger

2022-09-30

Leakage It is mainly manifested as leakage (small amount, discontinuous water droplets) and leakage (large amount, continuous water droplets). The main parts of external leakage are the sealing part between plates, the second sealing groove of plates, and the inner side of end plates and compression plates. Efflux The main feature is that the medium on the higher side of the pressure runs into the medium on the lower side of the pressure, and there will be abnormal pressure and temperature in the system. If the medium is corrosive, it may also cause corrosion of the sealing gasket of plate heat exchanger. The cross flow usually occurs in the diversion area or the secondary sealing area. High pressure drop The pressure drop at the inlet and outlet of the medium exceeds the design requirements, even many times higher than the design value, which seriously affects the requirements of the system on flow and temperature. In the heating system, if the pressure drop at the hot side is too large, the flow at the primary side will be seriously insufficient, that is, the heat source is not enough, resulting in the outlet temperature at the secondary side can not meet the requirements. The heating temperature cannot meet the requirements The main feature is that the outlet temperature is too low to meet the design requirements.

Cooling characteristics of shell and tube heat exchanger

Cooling characteristics of shell and tube heat exchanger

2022-09-30

1. The heat transfer tube adopts the copper tube with rolled fins on the outer surface, which has high thermal conductivity and large heat transfer area. 2. The guide plate guides the shell side fluid to flow continuously in the heat exchanger in a broken line shape. The distance between the guide plates can be adjusted according to the good flow rate. The structure is solid and can meet the heat transfer of shell side fluid with large flow or even super large flow and high pulsation frequency. 3. When the shell side fluid is oil, it is suitable for heat exchange of oil with low viscosity and relatively clean.

Component functions of plate heat exchanger

Component functions of plate heat exchanger

2022-09-30

Reasonable selection of heat exchange area is the key to procurement. When selecting the heat exchanger, the required flow shall be selected according to the process requirements, the viscosity of the feed liquid, the temperature difference of the heat exchange, etc. Excessive flow will cause waste, and the flow channel is easy to block. If the pressure is too small, it will affect the use, increase the non fermentation time, and cause damage to the deflector due to excessive pressure. Therefore, scientific selection and purchase shall be made according to working conditions. The plate thickness of plate heat exchanger is only 0.6~0.8mm, and the heat exchange tube thickness of shell and tube heat exchanger is 2.0~2.5mm; The shell of shell and tube heat exchanger is much heavier than the layout of plate heat exchanger. In the case of completing the same heat transfer mission, the required heat transfer area of plate heat exchanger is smaller than that of shell and tube heat exchanger. The layout of shell and tube heat exchanger is excellent in terms of strength, but it is not ideal from the perspective of heat exchange. As the fluid moves in the shell side, there are baffles shell, baffles heat exchange tubes, and tubes shell bypasses. The fluid passing through these bypasses does not fully participate in heat transfer. In plate heat exchanger, there is no bypass, and the ripple of plate can make the fluid turbulent at a small flow rate. Therefore, the plate heat exchanger has a high heat transfer coefficient, which is usually 3~5 times that of the shell and tube heat exchanger.

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