The conductivity of the laboratory reverse osmosis pure water equipment exceeds the standard, is the

The conductivity of the laboratory reverse osmosis pure water equipment exceeds the standard, is there any way to solve it?

by:Ocpuritech     2021-05-02
Laboratory equipment reverse osmosis water conductivity exceeded, is there any way to solve it Author:? Today, water pollution, water pollution and ecological damage shocking case, laboratory reverse osmosis water equipment is more sophisticated than the average, can effectively remove Harmful heavy metals, colloids, bacteria, microorganisms, etc., are highly resistant to pollution, and the effluent water quality is more stable. It can ensure a higher desalination rate of the system in a low-pressure environment. The raw water has a higher reuse value after treatment, which is more in line with the current water laboratory demand. The ultrapure water conductivity exceeds the standard. This is a problem that the laboratory reverse osmosis pure water equipment application personnel are very confused. What causes this situation? How to deal with the laboratory reverse osmosis pure water equipment conductivity exceeding the standard? Today, the editor will analyze the research results and briefly introduce the reasons that lead to the conductivity exceeding the standard. The reasons for the excessive conductivity of the reverse osmosis pure water equipment of the environmental protection laboratory are basically summarized as the following seven points. By detecting whether these problems exist, if they exist, the conductivity of the ultrapure water will exceed the standard. 1. Water quality problem: Is there any obvious change in the water quality of the raw water? If the conductivity of the product water increases due to an abnormal increase in the conductivity of the water inlet, the conductivity of the water inlet can be adjusted. After the conductivity of the water inlet returns to normal, the conductivity of the product water will also return to normal. 2. Membrane assembly problem: check whether the reverse osmosis membrane used in the ultrapure water equipment is aging or oxidized. If the salt rejection rate decreases for this reason, the reverse osmosis membrane module needs to be replaced. 3. Operation problems: Whether there is an instantaneous shutdown or improper operation. This situation is likely to cause the reverse pressure of the reverse osmosis membrane, and the reverse osmosis membrane ruptures, causing the conductivity to rise sharply after restarting. The reverse osmosis membrane can be directly replaced, which solves this problem. 4. Sealing ring problem: The sealing ring head is broken and the sealing ring leakage causes the conductivity of the reverse osmosis membrane module to increase sharply. It is recommended to replace the sealing ring. The specific method is to detect the water quality of each membrane module and find out the replacement of the leaking part. 5. Conductivity meter: Check whether the conductivity meter is working properly. If the displayed value of the instrument is not correct, replace the conductivity meter with a new one. 6. Dosing problem: It is difficult to reduce the secondary conductance when the ultrapure water equipment is turned on, or the reduction time is too long. This situation is very common in bipolar reverse osmosis ultrapure water equipment. In the intermediate stage between the first stage and the second stage, sodium hydroxide is usually used to regulate the removal of carbon dioxide by water. The amount of sodium hydroxide is related to conductivity. It is recommended to adjust the amount of sodium hydroxide.
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