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What are the advantages of semi-welded plate heat exchanger? When should the plate be replaced?
Release time:
2021-11-03
Semi-welded plate heat exchanger is a new type of high efficiency heat exchanger, which is composed of a series of copper sheets with certain ripple patterns.
Semi-welded plate heat exchangers should be cleaned regularly to improve efficiency and prolong service life. Now, let's talk about the situation under which it is no longer just to clean the dishes to make the equipment run normally, but to change it to run normally.
Semi-welded plate heat exchanger is mainly used for separating medium and exchanging heat. It can be said that it is an important part of the heat exchanger. At present, its plate is mainly stainless steel, and of course, titanium, titanium palladium, copper, nickel, etc. What if there is a problem with its plate?
When the film is abnormal, we should take appropriate measures, such as scaling, corrosion, etc. The mainboard needs to be repaired or replaced in the following cases:
The plate fouling is serious, and the semi-welded plate heat exchanger cannot work normally, so it needs to be cleaned by chemical descaling method. When the plate is cracked and perforated due to corrosion and accidental damage, the semi-welded plate heat exchanger needs to be replaced.
Due to the long working time, the surface of the semi-welded plate heat exchanger will produce different degrees of dirt or deposits, which will increase the flow resistance and reduce the heat transfer function. These are mainly manifested in the increase of the pressure difference between the inlet and outlet pressure gauges, and the decrease of the outlet temperature of the cold medium, which requires cleaning. What is the reason for blocking and scaling of semi-welded plate heat exchanger?
1. Blockage
Particulate impurities with a diameter of more than 1.5~3 mm are easy to block the wooden channel, and the flow channel spacing is small. Blocking will lead to a significant decline in the heat transfer capacity of the equipment, and cause serious interruption in the continuous production of the device. Therefore, coarse filter or backwash device can be set at the media inlet if necessary to avoid blocking.
2. Zoom
In serious cases, the plank path will be blocked, and the plank is designed with a large number of supporting points. If there is dirt, the heat transfer coefficient of the heat transfer device will be reduced, which will disturb the flow and pressure of the medium. In places where solid impurities are easy to gather, the fluid forms local retention, resulting in dirt. After the calcium and magnesium ions in the medium precipitate at appropriate temperature, the honeycomb is easy to form samples in the honeycomb.
Semi-welded plate heat exchanger is a new type of high efficiency heat exchanger, which is composed of a series of copper sheets with certain ripple patterns. A thin rectangular frame safety channel is generated between various plates to exchange calorific value according to the plates. Type heat exchanger is an ideal machine and equipment for liquid-liquid and liquid-steam heat exchanger. It has the characteristics of high heat exchange efficiency, small heat damage, compact and light structure, small floor area, convenient installation and cleaning, universal application and long service life. Under the same working pressure failure condition, it accounts for one third of the shell-and-tube heat exchanger, and the heat utilization rate can reach more than 90%.
Working advantages of semi-welded plate heat exchanger:
1. The circulating pump can be DC variable frequency; Independent variable operation.
2. With high-quality stainless steel plate heat exchanger, the generator unit is small in size and covers a small area.
3. Centralized digital display of main operation parameters is convenient and reliable.
4. The exchange of semi-welded plate heat exchanger is standardized and modular, and the content can be easily selected and operated according to the customer's situation, so as to reduce the investment cost of the project.
