1. The evaporator is washed regularly.
The maintenance of the evaporator usually adopts the method of “washing effect” (also called furnace washing), that is, cleaning the dirt in the evaporator. Different types of evaporators have different fouling conditions under different operating conditions, so the washing effect should be carried out regularly according to actual production and experience. The length of the washing cycle is closely related to the production intensity and steam consumption. Therefore, we must pay special attention to the quality of operation and extend the washing cycle. There are two kinds of washing effect: large washing and small washing.
a. Great washing. It is the washing effect method of discharging washing effect water. First reduce the amount of steam input, drain the material in the effect, then add the condensed water to the specified liquid level, and increase the steam pressure to make the water boil to dissolve the dirt in the effect, turn on the circulating pump to flush the pipeline, and when the washing requirements are met, Reduce the steam pressure, and then drain the washing effect water. If the fouling is serious, wash twice.
b. Small wash. Small washing is a method of not draining the washing effect water. Generally, the top of the evaporator heater is easy to foul, and it can be washed regularly before the overall fouling to remove the local fouling layer of the heating chamber, so as to restore the normal evaporation intensity. The method is to reduce the amount of steam, exhaust the material in the heating chamber and the circulation pipe, and then when the water in the circulation pipe reaches a certain level, then increase the steam pressure and resume normal production, allowing the washing water to circulate and wash in the effect.
2. The evaporator often observes the operating current and working conditions of each feeding pump, over-feeding pump, and forced circulation pump.
3. The environment around the evaporator should be kept clean and free of debris, and the insulation and protection layer outside the equipment should be intact. If damaged, maintenance should be carried out from time to time to reduce heat loss.
4. Strictly implement the major, medium and minor repair plan, regularly conduct disassembly inspection and repair, and make records, and accumulate the data of equipment inspection and repair to facilitate technical improvement.
5. The measurement and safety accessories of the evaporator, thermometers, pressure gauges, vacuum gauges and safety must be checked regularly. It is required to be accurate and reliable to ensure the correct operation control and safe operation of the evaporator.