1. Feed must be stable and clean

Filter first to keep suspended solids at a low level; otherwise, nozzles and heat exchangers will get clogged.

Avoid sudden large-volume feeding; fluctuating liquid levels can easily cause material carryover and foaming.

For oily or emulsified wastewater, remove oil first; otherwise, condensate will be contaminated with oil and tail gas will have a strong odor.

2. Strictly prevent foaming and overflow

Cutting fluids and cleaning wastewater are most prone to foaming.

Add defoamer in small, frequent doses instead of a large amount at once.

Once foam overflows the top, it will directly affect vacuum, contaminate clean water, and damage the vacuum pump.

3. Vacuum degree must be stable

Insufficient vacuum means insufficient evaporation capacity.

Check regularly: vacuum pump oil level, pipeline leaks, and valve seals.

If vacuum fluctuations occur, prioritize checking condenser cooling and sealing points.

4. Cooling system must not be interrupted

Cooling towers and circulating water must operate normally, and water temperature must not be too high.

Poor cooling leads to incomplete condensation, reduced vacuum, and a sharp drop in equipment efficiency.

Pay attention to cooling in summer and antifreezing in winter.

5. Discharge concentrated liquid in a timely manner

Overly thick concentrate will cause wall adhesion, scaling, and pump burnout.

Discharge when the set concentration is reached, in small and frequent batches, instead of waiting until it is extremely concentrated.

6. Control scaling and clean regularly

High-salinity wastewater is most likely to cause scaling; slowed evaporation and increased energy consumption indicate the need for cleaning.

Perform online acid cleaning/alkaline cleaning as required instead of forcing long-term operation.

After cleaning, inspect seals and gaskets to prevent liquid leakage.

7. Inspect pumps and seals

Circulating pumps, feed pumps, and vacuum pumps are key vulnerable components.

Listen for abnormal noises, check temperatures, and inspect mechanical seals for leaks.

Shut down the equipment promptly if abnormalities are found; do not operate with faults.

8. Maintain tail gas and odor control systems

Inspect and replace demisters and activated carbon regularly.

Increased odor and oil-contaminated clean water are usually caused by inadequate front-end demisting.

9. Bottom line for safe operation

Opening covers or operating under pressure is strictly prohibited during operation.

Perform maintenance only after pressure relief and cooling.

Keep the site ventilated, prohibit open flames, and prevent static electricity.