Conductivity is an important indicator to reflect the water production and cleanliness of purified water equipment, once the conductivity index is not within the standard value, the water quality is bound to be a problem, today we will first understand the purified water conductivity is suddenly high and low is how?
The lower the conductivity of the purified water, the higher the purity of the water. The high and low conductivity of purified water will seriously affect the purified water standard and affect the productive efficiency. Therefore, we must solve the problem in time according to the actual situation, to avoid greater losses caused by unqualified water quality.1. In general, the water treatment system is consistent with the initial state, with no change and increased conductivity.
At this time, the reason for the high conductivity is that the aging of the reverse osmosis membrane components leads to the decline of the desalination rate. The correct treatment method is to replace the reverse osmosis membrane of the reverse osmosis host, and usually the replacement frequency (cycle) is 2-3 years once.
2. Other information:
A. The conductivity of normal equipment operation increases suddenly, and the displacement increases.
This is due to the sharp increase in permeability leakage of the reverse osmosis membrane assembly, it is recommended to replace the sealing ring. The specific method is to test the water quality of each membrane component, and to find out the leakage of the part of the replacement.
In b. When the equipment is started, the secondary conductance rise is difficult to come down or the drop time is too long.
This situation is generally common in double-stage reverse osmosis, in the middle of the first and second stage generally add sodium hydroxide to adjust the amount of carbon dioxide removal in water measures, the amount of sodium hydroxide addition is related to the conductivity, it is recommended to adjust the amount of addition.
c. The water production of the equipment does not change after a period of time, the conductivity increases and the displacement increases.
It shows that the membrane is degraded by the oxidative medium, and the conductivity increases, and the membrane components need to be replaced.
d. The effect of sand carbon purification and filtration of equipment pretreatment is reduced or ineffective
No regular and timely backwashing (water intake conductivity will be relatively higher).
The security filter element of e and RO water inlet is dirty and blocked, not replaced in time, and the pressure difference is large.
f, the raw water quality is unstable, the raw water quality changes, the raw water conductance is high water production is naturally affected.
g. High water temperature and inlet PH value during water preparation are not within the reasonable control range.
h, the higher the purity of water, of course, the stronger the ability to dissolve substances, contact with air, such as carbon dioxide, oxygen, ammonia is easy to quickly dissolve with it, so the conductivity rate increases quickly.
The above several are the most common causes of unqualified purified water conductivity. In addition, the conductivity standard is not equal to the water quality standard of pharmaceutical purified water. The water quality of pharmaceutical purified water also includes other items such as total organic carbon, heavy metals, microorganisms, etc. When the purified water electrical conductivity is suddenly high and low situation, we must find out the reason to take the corresponding measures according to the actual situation, to remove the problem. Avoid greater losses due to substandard water quality.