ow to disassemble the Heat Exchanger Unit
The advantage of regular cleaning of the Plate heat exchanger is to prevent the equipment from being blocked and make the equipment heat exchange more efficient. If it is not cleaned for a long time, it will be difficult to clean than when it is cleaned again. , Regular cleaning can remove scale in time.
The Heat exchanger unit has high heat exchange efficiency, and there is almost no energy loss in operation, and efficient heat exchange efficiency is completed in a short time. The work that many users need to do when cleaning regularly, why should you clean the Heat Exchanger regularly? The following are the reasons for regular cleaning of the heat exchanger:
1. Cleaning In the production process of the chemical industry, due to many reasons, plate heat exchangers and pipeline roads will produce many such as coking, oil dirt, scale, sediment, corrosion products, polymers, fungi, Dust such as algae and slime.
2. The generated dust will cause the Plate Heat Exchanger and pipelines to fail, the equipment system will have a production decline, energy consumption, material consumption and other undesirable conditions. When the dust corrosion is particularly serious, the process will be suspended and the equipment system will be forced to stop production. Various economic losses are directly formed, and even vicious production accidents may occur.
The purpose of using the heat exchanger unit is mainly to achieve better heat exchange. At the same time, the liquid flow rate needs to be controlled within a reasonable range. The flow rate is normal. It can also explain that the heat exchange efficiency is high. It should be measured at any time during operation. Flow rate.
The amount of heat transfer area is proportional to the power of 0.6 to 0.9. The power consumption is proportional to the third power of speed. It can be seen that low speed can save energy and reduce operating costs. However, the low velocity of overheating will cause a large decrease in the heat transfer coefficient and the addition of heat transfer area.
The plate heat exchanger should have a flow rate problem, that is, its initial investment and operating costs are small at this flow rate. Generally, it is appropriate to control the water velocity at 0.2 to 0.6 m / s. Regarding the centralized heating system of high-temperature water, the allowable pressure drop of the external network to the heat exchange station is generally 30-50kPa. Therefore, in the calculation of the plate heat exchanger, the flow rate of the primary heat medium should be controlled within the range of 0.2 to 0.6 m / s.
Disassembly and inspection of heat exchanger units
1. Disassemble the head bolts of the plate heat exchanger;
2. Take out the gasket between the heads;
3. Check the blocking condition controlled by the plate heat exchanger;
4, microscopic inspection of the shell, control and component corrosion, cracks, deformation, etc., if necessary, choose surface inspection.
5. Check the outer wall of the plate heat exchanger, the corrosion, cracks, deformation, bulging, and wall thickness reduction of the pressure components.
6, check the plate heat exchanger received and its welds, flanges and other sealing components for leakage or damage.
7. Check whether the safety accessories are sensitive and reliable.
8. Check whether the support is damaged.
9. Check the sealing surface and gasket of the plate heat exchanger.
10. Check the damage of the fasteners.
11. Check whether the foundation of the plate heat exchanger is inclined, damaged, cracked, and whether the fastening bolts and horns are loose or damaged.
