Diagnosis of reverse osmosis water treatment system

During the operation of the reverse osmosis water treatment system, due to the complexity of the conditions of use, imperfect system design, improper configuration of pretreatment equipment, improper selection of water treatment agents, abnormal fluctuations in the system water source and problems that occur during the operation Various problems and other factors may lead to system failure: desalination rate, water production decrease, water inlet pressure increase, unit water consumption increase, etc.

Chiwatec Water Treatment Co., Ltd. utilizes years of experience in design and installation of reverse osmosis systems and rich operating experience, and adopts professional technical analysis methods to analyze and diagnose various faults in the operation process of reverse osmosis water treatment systems in detail. At the same time, through Submit solutions for static and dynamic simulation tests.

1. Analysis of historical data

The operation process of the reverse osmosis device is the process of generating historical data. In this process, the changes in various performances of the reverse osmosis and various factors that may cause the failure of the reverse osmosis system are often reflected in these data information. In particular, the analysis of the following historical data:

  1. Changes in routine analysis data of influent turbidity, SDI, and COD of reverse osmosis devices;
  2.  The inlet water pressure of the reverse osmosis device, the middle section pressure (it is a first-stage two-stage system), the concentrated water pressure, and the product water pressure;
  3. Reverse osmosis device inlet water conductivity, product water conductivity, inlet water flow, product water flow, etc.;
  4. Changes in operating parameters (including turbidity, pressure, etc.) of the reverse osmosis pretreatment system;
  5. The problems found in the process of equipment maintenance and the means to deal with them, etc.

The above data are often insufficient, and more information is needed according to changes in the site situation. After obtaining the above data, it is often necessary to adopt some professional processing methods (such as standardization, etc.), observe the development trend of operation, and propose solutions.

2. On-site investigation

When the results of historical data analysis cannot match the actual fault phenomenon, on-site investigation is one of the important means. The investigation items include:

  1. The rationality of the body design of the reverse osmosis device;
  2. Rationality of reverse osmosis pretreatment system design;
  3. Whether the operating procedures are perfect;
  4. Whether the dosing of the reverse osmosis system is normal, whether the added medicine is compatible with the system, whether the pretreatment flocculant is compatible with the reverse osmosis additives (scale inhibitor dispersant, bactericide, reducing agent).
  5. The configuration of the reverse osmosis pre-filter (security filter) filter element, etc. The above data are often insufficient, and more information is needed according to changes in actual conditions.

3. Water quality analysis

While analyzing the above two contents, it is necessary to further analyze the source water, reverse osmosis influent water and other possible water source water quality. The analysis items mainly include: turbidity, SDI, COD, Ca2+, Mg2+, Sr2+, Ba2+, SO42-, alkalinity, silicon, etc. In our central laboratory, all these water quality analysis items that may cause system failures will be tested one by one; at the same time, the quality and flow rate of the incoming and outgoing water of each membrane shell (reverse osmosis pressure vessel) in the main body of the reverse osmosis device will be further analyzed.

Xi’an CHIWATEC Water Treatment Technology is a high-tech enterprise specialized in various water processing devices. Aside from these individual products, which cover a number of types and series, we can also help with related comprehensive engineering projects. Thanks to our hard work and dedication upon our founding, we are now one of the fastest-developing water treatment equipment manufacturers in Western China.

Further reading

Underground Reverse Osmosis Plant

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