Common Problems with Handling Zinc Sulfate Concentrated Crystallization Triple Effect Evaporator (2205 Material/Titanium)

Conventional in the processing of zinc sulfate evaporation concentration is more common is the use of three-effect evaporation concentration equipment, there are also front use of MVR evaporator equipment, the comprehensive situation of the use of MVR evaporator to save some energy, but the three-effect evaporator as a relatively long-term wide range of evaporation concentration equipment, in use of low failure rate, long use time, there are also many enterprises still choose to use three-effect evaporator on the evaporation concentration crystallization of zinc sulfate, and now for the use of three-effect evaporation process of some common failure problems are listed, Welcome to:

1. For the problem of general pipeline blockage, which is more prone to problems in the three-effect evaporator, this should be fully considered in the design, the necessary flushing and steam purging, the necessary drainage and emptying devices, the slope of the pipeline and the thickness of the pipe diameter.

2. The condensate design should be discharged smoothly, set up the necessary condensate secondary gas-liquid separation device, make full use of the secondary flash steam of the condensate, if the condensate can not be discharged in time, and poured in the heating chamber, it will cause a decrease in the amount of evaporation.

3. The choice of vacuum pump is based on the amount of evaporation, and the form of the suction amount and vacuum pump is reasonably selected to maintain the necessary vacuum degree.

4. Zinc sulfate solution is set up in the one-effect evaporator of the discharge, the specific gravity of the zinc sulfate solution is monitored in real time online, and the discharge is carried out in time according to the specific gravity concentration.

5. The area selection of the condenser and the condensation will discharge the scale in the pipe and must be removed regularly.

6. Secondary steam zinc sulfate entrainment material, one is that the liquid level circulating in the separation chamber is too high, the second is that the height and directness of the separation chamber are small in the design stage, and the third is that the circulation pump flow rate is too fast during the evaporation process or the foam generated by the material is relatively large, which will cause droplets to be brought into the condensate.

7. The rationality of the automatic control logic setting, the general one-effect steam heating can be associated with the one-effect temperature and the one-effect pressure double correlation selection, the difference is that the correlation temperature general reaction is slightly lagging behind, the associated one-effect pressure is more sensitive and rapid, and the reasonable automatic control logic makes the evaporation concentration process of zinc sulfate more stable and good operation.

8. In the production process, it is necessary to check the situation frequently, and after discovery, the cause should be carefully sought out and dealt with in time.

9. Machine seal cooling water is set up separately machine seal water system and use soft water, circulating water system plus descaling agent, regularly clean the heating chamber and condenser and system, and maintain the evaporation of the evaporator.

A good system is inseparable from the usual maintenance, only usually pay attention to maintenance and maintenance, in order to ensure that the vitality of the evaporator is maintained at the level of evaporation and extend the life cycle of the evaporation crystallizer.