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Daily evaporation system running and maintenance

A: drive system process


Shall be carried out in strict accordance with the operational procedures, preparation before driving.


1, check carefully whether the heating chamber water first, avoid hot or water hammer in bubbled into steam when play causes the whole drama vibration of evaporator;


2, check the pump, instruments and steam and condensate steam pipe line, feed line, etc are in good condition.


3, when driving, according to the material, evaporation equipment and included with automatic control device, according to the set procedures in advance, through the control room in order according to the order of the provisions of the opening, open the charging valve, steam valve, and in turn to see the effect of separating tank liquid level display.


4, e. and open the associated pump when the level reaches;

Set the instrument Settings, at the same time as automatic state;


5, to vacuum device for vacuum;

Monitor the effect of temperature, examine its evaporation;

Through the instrument product concentration, and then increase the steam valve opening in order to improve the steam flow rate;


6, when the steam flow to expectations, adjust feeding flow to control the concentration of the concentrated solution, in general, reduce the feed flow rate increases product concentration, and increase the feed flow rate, lower concentration.


7, driving process common faults and processing;

Due to abnormal operations are often appeared in the process of driving many faults.

The most common is the steam supply is not stable.

This may be because of cold or condensing pipe lines in the air, check valve, pump seal should be paid attention to and the export, when at normal operating temperature, won't appear this kind of problem;


Also may be due to air leakage into the second effect, caused by three effect evaporator, when an effective separation tank process steam pressure exceeds a certain value, the leak will disappear on its own.

 




2: operation


1, in the operation of the equipment, must be careful operation, strictly controlled.

Pay attention to the monitoring of the evaporator operation and regulation index of each part.

Normally, the operator should check the adjustment according to the rules of evaporator operation, and completes the operation according to the factual revelation.


2, when the device is under a state of stable operation, don't change the performance parameters, or you will make the device in a state of imbalance, and it takes some time to adjust to flat, thus resulting in loss of production or more bad effect.

 


3, evaporation device of liquid level control is the key, the purpose is to make the unit runs smoothly, effect from one to another effect of the flow more reasonable and constant.

Effectively control the liquid level can also avoid the phenomenon of cavitation of pump, most of the pump is boiling liquid, so the risk of "cavitation".

Only control the liquid level, to ensure that the service life of pump.


4, according to the rules of time check control instrument and meter reading, such as beyond the regulation, should quickly find the reasons.

 


5, if material liquid evaporation for corrosive solution, we should pay attention to check the lens glass, to prevent corrosion.

Once the lens glass corrosion is serious, failure occurs when the liquid level sensor, can cause dangerous.




Three: stop


Parking have completely, short-term parking and emergency stop.

When the evaporator unit will not start or for a long time due to the need of maintenance emptying, should stop completely.

Device for minor repair when parking just a short time, the device should be in the standby state.

In the event of major accidents, should take emergency stop.

Parking for accident, is to predict a possible situation, generally should follow the following points:


1, when the accident happened, in the first place in the fastest way to cut off the steam (or close the pneumatic valve control room, or the site closed manual stop valve), in order to avoid material liquid temperature continues to rise.


2, consider whether to stop the material liquid supply security, if the security, the fastest way to stop feeding.

 


3, what happens to consider destruction of vacuum and steam judge the bad will not happen, should open near the end of the effect of vacuum switch to break the vacuum state, stop operation of evaporation.


4, be careful handling hot material liquid, avoid to cause deaths and injuries.


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