How to maintain purified water equipment under high water temperature conditions?

The purified water equipment can run stably for a long time. In addition to the standard operation and maintenance, it is necessary to meet the working conditions. The water temperature is one of the conditions. How to maintain the purified water equipment under high water temperature conditions?

First, the high water temperature has a great influence on the reverse osmosis membrane of the purified water equipment. First, when the water temperature rises, in some systems with constant flow operation, we will find that the desalination rate of the reverse osmosis membrane system has decreased. This is because the water temperature rises due to the increase in water temperature, and the water flux increases. If the constant flow rate is maintained, the operating pressure required to produce the same flow rate of water will decrease, and the operation pressure will decrease, resulting in a decrease in the salt rejection rate. The regeneration cycle of the device is also shortened at the same time. To maintain the system's desalination rate, constant pressure operation is required, but at this time the water production will increase, and as the temperature rises, the water production will increase. Therefore, under high water temperature conditions, the maintenance of system performance needs to be adjusted according to actual needs.

Second, the problem of system maintenance caused by high water temperature is not only these, but the greater danger comes from microbial pollution. Summer water temperatures are mostly between 15 ° C and 30 ° C, and this temperature is also a suitable condition for most bacterial growth. As the water temperature rises, the bacterial metabolic rate and growth rate increase accordingly.

Third, once the microorganism enters the RO system, it will grow and grow with the nutrient salt concentrated in the concentrated water section of the RO, and even survive in the water producing section. In a hot water environment, the microorganisms multiply rapidly, and a biofilm layer can be formed on the surface of the RO membrane within a few days, resulting in a rapid increase in the pressure difference between the inlet and outlet of the RO system, a rapid decrease in water production and desalination rate, and product water. Being polluted. Bio-contamination leads to the collapse of the diaphragm of the roll-type component, which the industry calls the "telescope" phenomenon. When microbial contamination occurs, it is necessary to take timely measures to chemically clean the system. The recommended cleaning agent 0.1% NaOH solution is cleaned under the cleaning conditions of water temperature <30 ° C, pH: 11-12.

The above is the impact of high water temperature conditions on purified water equipment, and the corresponding maintenance work is carried out to promote the more stable operation of the purified water equipment and ensure the safety of water.