MVR evaporators may encounter various common problems during operation, which may involve equipment performance, operational efficiency, energy consumption, and safety. Here are some common operational issues and brief descriptions of MVR evaporators:

      1. Leakage issue

      Problem description: Leakage often occurs in weak points such as machine equipment and pipeline welding, flanges, sealing fillers, compensators, etc. The fundamental cause of leakage is cracking due to thermal expansion and contraction during opening and stopping, or softening of pipelines due to corrosion. When opening and stopping, stress impact can cause cracking, resulting in liquid or steam leakage.

      Solution: Before driving, it is necessary to strictly conduct equipment testing, including hydrostatic testing, leak testing, etc., and regularly check the corrosion of the equipment. Damaged parts should be repaired or replaced in a timely manner.

   2. Crystal blockage

      Problem description: For volatile and easily crystallized aqueous solutions, crystals often appear as the raw materials increase in concentration, causing blockages in pipelines, gate valves, electric heaters, etc., which prevent the flow of raw materials and affect the normal operation of volatilization.

      Solution: The salt mud should be separated in a timely manner and cleaned regularly. If there is a blockage problem, pressurized water can be used for cleaning, or vacuum pumps can be used for pumping to rescue it.

      3. Decrease in evaporation rate

      Problem description: The decrease in evaporation may be caused by excessive dirt or attachments on the inner wall of the heater.

      Solution: Activate the cleaning program to perform online cleaning of the evaporation system to remove dirt and attachments, and restore evaporation capacity.

      4. Filter blockage

      Problem description: Filter blockage can cause slow feed rate or low feed flow rate, affecting evaporation efficiency.

      Solution: Check the filter element. If there is any blockage, clean the blockage or replace the filter element.

      5. Abnormal system temperature

      Problem description: The high temperature of the evaporator may be due to the valve opening being too large, resulting in too much refrigerant in the evaporator, which cannot evaporate fully and occupies part of the heat exchanger area, reducing the heat conduction area and increasing the evaporation temperature.

      Solution: Adjust the opening of the air conditioning expansion valve moderately based on the heating capacity to control the amount of refrigerant in the evaporator and maintain a suitable temperature.

      6. Compressor Surge

      Problem description: During normal operation of the MVR evaporator, the compressor may experience surge, resulting in a regular and very harsh sound accompanied by significant vibration.

      Solution: Manually increase the opening of the balance valve. After the surge disappears, the balance valve slowly closes. At the same time, the status of the compressor and its connecting pipelines should be checked to ensure that there are no abnormalities.

      7. Abnormal liquid level in the separator

      Problem description: High or low liquid level in the separator can affect the evaporation effect. Excessive liquid level may lead to the presence of concentrated liquid components in distilled water; If the liquid level is too low, it may be caused by insufficient feed or leakage in the concentrated liquid pipeline.

      Solution: Adjust the feed rate or inspect and repair the leakage points in the concentrated liquid pipeline according to the specific situation to maintain the separator operating within the appropriate liquid level range.

      8. Excessive energy consumption

      Problem description: MVR evaporators may experience high energy consumption during operation, mainly due to unreasonable design parameters and unstable operating parameters of the equipment.

      Solution: Optimize the design and operating parameters of the equipment, such as temperature, pressure, etc., to improve its energy efficiency. At the same time, regular inspection and maintenance of various components of the equipment to ensure their normal operation is also an important measure to reduce energy consumption.