How to maintain stainless steel industrial water purification equipment under high water temperature

How to maintain stainless steel industrial water purification equipment under high water temperature conditions?

by:Ocpuritech     2021-03-10
How to maintain stainless steel industrial water purification equipment under high water temperature conditions? Author of the article: in the industrial water production process, many industry requirements on water quality is relatively high, ordinary water can not meet the production needs. How to maintain stainless steel industrial water purification equipment under high water temperature conditions? High water temperature sometimes affects the operation of stainless steel industrial water purification equipment. The equipment needs to be maintained. The editor of the water treatment equipment company will introduce to you. High water temperature conditions have a great impact on the reverse osmosis membrane of stainless steel industrial water purification equipment. First, when the water temperature rises, in some systems that operate at constant flow, we will find that the salt rejection rate of the reverse osmosis membrane system decreases. This is because the increase in water temperature leads to the decrease in viscosity and the increase in water flux. If the constant flow operation is continued, the operating pressure required to produce the same flow of water will decrease, and the decrease in operating pressure will cause the desalination rate to decrease, and subsequent desalination The regeneration cycle of the equipment will also be shortened at the same time. To maintain the system's desalination rate unchanged, it is necessary to adopt constant pressure operation, but at this time the water production will increase, and as the temperature rises, the water production will continue to increase. Therefore, under high water temperature conditions, the maintenance of system performance needs to be adjusted accordingly according to actual needs. However, the problems caused by high water temperature to system maintenance are not only these, but the greater danger comes from microbial contamination. The water temperature in summer is mostly between 15°C and 30°C, and this temperature is also a suitable condition for the growth of most bacteria. As the water temperature rises, the metabolic rate and growth rate of bacteria will increase accordingly. Once the microorganisms enter the RO system, they will multiply and grow with the help of the concentrated nutrients in the RO concentrated water section, and they can even survive in the water production section. In an environment with hot water temperature, microorganisms multiply rapidly, and within a few days, a biofilm layer can be formed on the surface of the RO membrane, which causes the pressure difference between the inlet and outlet water of the RO system to increase rapidly, and the water production and desalination rate decrease rapidly. Be contaminated. Biological contamination causes the shrinkage of the membrane of the roll-type module, which the industry calls a 'telescope' phenomenon. When microbial contamination occurs, measures must be taken in time to chemically clean the system. The recommended cleaning agent is 0.1% NaOH solution, and the cleaning conditions are water temperature <30°C and pH value: 11-12 for cleaning.
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