Shengzhou Hongrui Refrigeration Technology Co., Ltd
Tel：86-13857581028 E-mail：hweif@139.com
01
2023
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03
How to maintain Shengzhou evaporator?
What is the classification of evaporator in Shengzhou?
According to the evaporation method, it is divided into:
Natural evaporation: refers to the evaporation of a solution at a temperature below the boiling point, such as drying salt with seawater. The solvent only vaporizes on the surface of the solution, so the solvent vaporization rate is low.
Boiling evaporation: Heating a solution to its boiling point to evaporate in a boiling state. This is basically the case with evaporation in industry.
According to the heating method, it is divided into:
Direct heat source heating is a process of mixing fuel and air, directly injecting the high-temperature flame and smoke generated by combustion into the evaporated solution through a nozzle, heating the solution, and vaporizing the solvent. An indirect heat source heats the walls between the containers and transmits the evaporated solution. That is, the heat transfer process that occurs in a liver wall heat exchanger.
3. Calculated by working pressure
Shengzhou evaporator can be divided into atmospheric pressure, pressurized, and reduced pressure (vacuum) evaporation operations. Obviously, for temperature sensitive substances such as antibiotic solutions and fruit juices, they should be carried out under reduced pressure. High viscosity substances should be evaporated by heating with a pressurized high-temperature heat source (such as heat transfer oil, molten salt, etc.)
4. Classification by filial piety
Shengzhou evaporator can be divided into single effect and multi effect evaporation. The secondary steam generated by evaporation is directly condensed and no longer used, which is called single effect evaporation. When the secondary steam is heated to the next effect and multiple evaporators are connected, this evaporation process is called multi-effect evaporation.
How to maintain Shengzhou evaporator?
1) Frequently perform evaporator leak detection. Leakage is a common phenomenon in evaporators, and attention should be paid to frequent leakage during use.
There is a pungent odor when the ammonia evaporator leaks, and the leakage point will not frost. The leak can be checked with a phenolphthalein test paper. Ammonia is alkaline, so the phenolphthalein test paper turns red. From the perspective of the eyes, generally, the area where the evaporator does not frost is the leakage point, and the leakage point can be found using soapy water.
The halogen lamp and halogen leak detector can be used to check the leakage of the freon evaporator, or soap water can be used to find the leakage. During the inspection, it is possible to confirm with your eyes whether there is oil in the evaporative exhaust pipe. Due to the mutual dissolution of Freon and oil, when Freon leaks, oil also leaks out from the leak point. Therefore, any place with oil stains will leak. When using a halogen lamp to detect a leak, if there is a Freon leak somewhere, and the flame burned by the halogen lamp changes from blue to light green, light green, super green, purple, and purple, it can be determined how large the Freon leak is. "If the flame is dark green or purple, the craziness of the flame is toxic, so it cannot be checked using this method for a long time.". In this case, the leakage point can be confirmed with soapy water. For minor leaks, a halogen leak detector should be used to check for leaks.
2) Frequently check the frost condition of the evaporator. When the frost layer is too thick, timely defrost it. Abnormal frost may be caused by blockage, so it is necessary to promptly find the cause and eliminate it.
3) If the evaporator is not used for a long time, try to trap the refrigerant in a low liquid gas or condenser, and maintain the pressure of the evaporator at about 0.05 MPa (gauge pressure). For evaporators in salt ponds, they should be rinsed and flushed with tap water, and the ponds should be filled with tap water.
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Contact person: Mr. Huang
Contact address: Floor 2, No. 26, Zhongyuan, Pukou Street District, Shengzhou City, Shaoxing City, Zhejiang Province
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