Factors for the gradually higher conductivity of small industrial pure water equipment-Ocpuritech-im

Factors for the gradually higher conductivity of small industrial pure water equipment

by:Ocpuritech     2021-04-26
Small industrial water equipment increasingly high conductivity factor author of the article: With economic development now appear a bit small industries, in industrial water we will select a number of small industrial water equipment. We all know that after small industrial pure water equipment runs for a certain period of time, the conductivity of the effluent will increase, but we will also encounter that the conductivity of the effluent of the reverse osmosis membrane that has just been replaced is still high, or when the two-stage reverse osmosis effluent is The conductance is higher than the first-level conductance. What are the reasons for these? Let's introduce the reasons for the gradual increase in the conductivity of the water produced by industrial pure water equipment. Long operating life: With the extension of the operating life of the membrane element, the salt permeability increases. Generally, high conductivity means that the entire water treatment system has not changed compared with the initial state. At this time, the reason for the high conductivity is that the aging of the reverse osmosis membrane module causes the salt rejection rate to decrease. The correct way to deal with it is to replace the reverse osmosis membrane of the reverse osmosis host. Leakage of connecting parts: The conductivity of the equipment in normal operation suddenly rises, and the drainage volume increases. This situation is caused by the rapid increase in electrical conductivity caused by the leakage of the sealing ring connected to the reverse osmosis membrane module. 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 leaked part to replace it. The performance of the membrane element is reduced: the membrane element is scratched, the membrane is oxidized, and the chemical cleaning is damaged. After the equipment has been running for a period of time, the water output has not changed, the conductivity has increased, and the drainage has increased. It shows that the membrane is degraded by the oxidizing medium, and the conductivity is increased, and the membrane module needs to be replaced. There is a large amount of gas dissolved in the water: when the equipment is turned on, it is difficult to decrease the secondary conductivity or the decrease time is too long. This situation is generally common in dual-stage reverse osmosis, and there is usually an increase in the first and second stages. Sodium hydroxide is a measure to adjust the amount of carbon dioxide removed from the water. The amount of sodium hydroxide added is related to the conductivity, and it is recommended to adjust the amount of addition. Rising water conductance: the rise of the feed water conductance directly leads to the rise of the produced water conductance, or the error of the conductance meter is damaged. Scaling pollution: high recovery rate, poor water quality, poor quality of scale inhibitor, unreliable addition of scale inhibitor, etc. Temperature rise: The salt transmission rate increases when the temperature rises. Organic pollution: bacterial pollution, colloidal pollution, insoluble NOM pollution, organic pollution, etc. Abnormal pH: Too high or low pH will seriously affect the desalination rate of membrane elements. Ultra-high pressure: Ultra-high pressure operation increases the salt transmission rate. The environmental protection is introduced here for the reasons for the gradual increase in the conductivity of the water produced by small industrial pure water equipment. The increase in the conductivity directly leads to the reduction of the water quality of the effluent, and we need to solve it in time.
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