Problem of salt formation in diaphragm evaporation effect body

The salt mining effect is not good. Is there something wrong with the design of the collection area in the body? In addition, as to whether there is a short circuit at the suction inlet of the salt mining pump, can the poster show the process for easier discussion?

From the original poster? Such a problem is mainly due to the problem of salt mining, and there is also the problem of material passing. As long as the salt mining equipment is matched, this problem can be solved.

The mainstream salt mining methods of the three-effect downstream evaporation process are: The first effect does not collect salt, the third effect collects salt and returns it to the second effect, and the second effect collects salt and removes the salt-alkali high-level tank, using the continuous salt mining method. If an automatic control system is adopted, continuous feeding can also be achieved. The second and third effects have serious salt formation, the external heater is clogged, the forced pump motor is over-current, and the alkali evaporation cannot be carried out. The performance is that there is salt but cannot be harvested. We also have this problem, which should be attributed to design issues. One is the position of the salt pipe opening, which was solved after many adjustments. You also need to explore this problem yourself, and not all experience can be directly applied. The second problem is the centrifuge. The double push centrifuge has good salt-alkali separation effect, but it cannot separate the fine salt particles, and these salts return to the system with the light alkali. It is recommended to install a cooling tank to cool the extracted salt sludge and ventilate and stir it to increase the size of the salt crystal particles. This can also solve the problem of centrifuge clogging. Third, the circulation capacity of the forced pump is too large, the flow rate in the external heating chamber is too large, and the salt mining effect of the salt mining pump is not good. The forced pump impeller of a smaller specification can be replaced. The fourth is the problem of production adjustment. The feed material must meet the requirements, the evaporation intensity distribution of each effect must be reasonable, and the concentration of the second effect must not be too high. This issue requires careful experimentation based on your own evaporator. Theoretical data is not easy to use. It would be better if automatic control could be used.

It is impossible to absolutely prevent salt formation during the evaporation of electrolytic alkali solution, but the following measures can be taken to reduce salt formation: 1. Strictly control the evaporation liquid level during operation, and try to avoid material shortage or interruption in the evaporator. 2. Reasonably select the salt mining pump and hydrocyclone separator to ensure the salt mining effect, so that the precipitated salt during the evaporation process can be mined as much as possible. 3. Increase the circulation speed of the liquid in the evaporator and reduce the chance of salt crystals adhering to and staying on the tube wall.