When is the plate heat exchanger replaced
When the plate heat exchanger plate is abnormal, we need to take corresponding measures immediately such as scaling, corrosion. The plates of the plate heat exchanger need to be repaired or replaced when the following conditions occur:
The scale of the plate is severe, which makes the heat exchanger unable to work normally. It is necessary to clean the inside of the plate heat exchanger by chemical descaling. The cleaning formula is directly requested from our technical department. When the plate is broken and perforated due to corrosion and accidental damage, a new plate needs to be replaced.
Plate maintenance of plate heat exchangers also needs to be taken seriously when problems occur in our equipment, we must properly handle them.Because the plate heat exchanger works for a long time, the surface of the heat transfer plate will produce different degrees of dirt or deposits, thereby increasing the flow resistance and reducing the heat transfer performance. These are mainly the pressure difference between the inlet and outlet pressure gauges and the temperature of the cold medium outlet. Reduced, so we have to clean it, what is the cause of blockage and fouling of the plate heat exchanger?
(1) Blocked:Particles larger than 1.5~3mm in diameter tend to block the passage of the plate, and the flow passage gap of the plate heat exchanger is small, which causes the heat exchange capacity of the equipment to be greatly reduced due to clogging, which seriously causes continuous production interruption of the device. Therefore, a coarse filter or a backwashing device can be provided at the inlet of the medium as needed to effectively prevent clogging of the plate heat exchanger.(2)Scaling:In severe cases, the plate passage is blocked. The plate heat exchanger plate is designed with a large number of support points. The scaling can cause the heat transfer coefficient of the heat transfer device to decrease, aiming to disturb the medium (to make the medium turbulent to improve heat transfer coefficient) and pressure bearing, where solid debris is easy to accumulate, the side effect is that the fluid forms a local stagnation to generate dirt, and the calcium and magnesium ions in the medium are easily formed into a honeycomb scale after being precipitated at a suitable temperature.