What is heavy pollution of reverse osmosis membrane

The reverse osmosis membrane element is used as a deep filtration method, and the surface of the reverse osmosis membrane element will inevitably have colloids, microorganisms, impurity particles and insoluble salts precipitated on its surface. , eventually need to be cleaned, but the length of the cleaning cycle is different. However, online cleaning, as a means of cleaning and maintenance, impact sterilization and regular protection of reverse osmosis system, is powerless in the face of heavy pollution of reverse osmosis membrane elements. At this time, it is necessary to perform offline cleaning of reverse osmosis membrane elements.

Principle and operation method of industrial EDI ultrapure water equipment

Ultra-pure water equipment adopts advanced reverse osmosis membrane water treatment technology and mature ion exchange water treatment technology, which is an irreplaceable means in the current process of producing high-purity water. Ultrapure water production equipment has high water quality, and can produce water uninterrupted, and it will not produce sewage, and save labor costs, which is deeply loved by industrial production enterprises. The edi system in the ultrapure water production equipment is suitable for water use in the water treatment industry, electronic industry, laboratory ultrapure water, hospital ultrapure water system and other industries. Nowadays, more and more industrial production processes are inseparable from industrial edi ultrapure water equipment. However, many people do not know its operation very well, so today I will focus on telling you the principle of industrial edi ultrapure water equipment and the operation method during use.

What is Redox Potential (ORP)?

It is the difference between the redox potential of the indicator electrode and the redox potential of the comparison electrode in the liquid, which can give a comprehensive indicator of the redox state of the entire system. 

Key points of installation details of softened water equipment

The foundation needs to be level, and a floor drain or drainage ditch should be set up nearby to drain the recycled waste water. Separate power sockets should be provided near the equipment

Ultrapure water equipment polishing resin function and filling method

Polishing resin is generally used at the end of the ultrapure water treatment system to ensure that the water quality of the system can maintain the water standard. Generally, the resistivity of effluent water quality can reach more than 18.25MΩ, and it has certain control ability on TOC and SiO2. A good polishing resin can reach TOC < 5ppb, silica < 10ppb, the resin type is MB-106up & MB-115, the ionic type of the polishing resin is H, OH type, and it can be used directly after filling without regeneration. It is generally used in the semiconductor industry.

MBR knowledge

In the field of sewage treatment and water resource reuse, MBR, also known as membrane bioreactor, is a new type of water treatment technology that combines membrane separation unit and biological treatment unit. There are many types of membranes, which are classified according to the separation mechanism, including reaction membranes, ion exchange membranes, permeable membranes, etc.; Structural type classification, there are flat type, tube type, spiral type and hollow fiber type. 

How to deal with blocked reverse osmosis membrane

 In the reverse osmosis desalination system, the selective permeability of the membrane allows water molecules to continuously permeate the membrane from the high pressure side, while the solute molecules remain in the original solution, resulting in a gap between the feed liquid on the membrane surface and the inlet feed liquid. The concentration difference, when severe, will produce a very high concentration gradient, a phenomenon called concentration polarization. Concentration polarization increases the osmotic pressure of the feed liquid and reduces the effective driving force, resulting in a decrease in water penetration rate and salt rejection rate.

How many arrangements of membranes can you name?

Grade : refers to the permeation times of the raw water, that is, the number of times the product water permeates the reverse osmosis membrane element. The desalination rate of one-stage reverse osmosis can reach 98-99%, so multi-stage reverse osmosis can achieve a desalination rate of more than 99.5%.

Summary of 31 pure water process problems

Answer: Pretreatment equipment includes: mechanical filter, high-efficiency fiber filter, activated carbon filter, precision filter, ultrafiltration, microfiltration, sodium ion softener, iron and manganese removal filter, dosing device, raw water tank, exposure gas pool.

In order to ensure the normal operation of reverse osmosis equipment, what problems should we pay attention to?

Reverse osmosis membrane separation technology (referred to as RO technology) is a new and practical water treatment technology. For a specific reverse osmosis system, the long-term stability of its performance is indispensable. The success of the long-term performance of the reverse osmosis system depends on normal operation and maintenance, including the commissioning of the entire system, start-up and shutdown, cleaning and maintenance, etc., membrane fouling and scale prevention, etc.
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Shijiazhuang Tianwang Environmental Protection Technology Co., Ltd.

Shijiazhuang Tianwang Environmental Protection Technology Co., Ltd. is a high-tech enterprise specializing in the research and development, manufacturing and sales of water treatment equipment. 

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