On 2018-08-08 14:48:54
Pure water production line equipment notes for operation
Pure water production line equipment in order to high quality water quality, the normal operation of pure water production line equipment is important, and the operation of pure water production line equipment need to pay attention to what matters needing attention? The normal operation of pure water production line equipment is the core of the reverse osmosis system, we will understand the operation of pure water equipment matters needing attention.
There are three main points for attention in the operation of pure water production line equipment. They are: excessive water intake SDI, low organic matter removal rate, and pretreatment and dosing. These three parts of the normal operation, you can run ### purified water equipment. The SDI of the reverse osmosis system exceeds the standard, which is mainly caused by the following three causes: poor filtration effect, the choice of cut-off material, unreasonable loading amount, and unreasonable control of the filter's periodic backwash and scrubbing time will lead to high SDI.
The factors of wrong process selection in engineering design: the problem of unqualified pollution index caused by the wrong selection of engineering design system is seen, and the solution is to transform the pretreatment system. The discomfort of pretreatment dosage: for the water source whose PH of raw water exceeds 8, the excessive addition of flocculant will easily lead to the formation of inorganic colloid, which leads to SDI exceeding the standard.
For the low removal rate of organic matter in the production line of purified water, we can take the following measures: improve the pretreatment process, improve the system COD removal measures. Try to replace other non-oxidant to kill COD. Activated carbon filter material adsorption COD full replacement or regeneration.
In terms of dosing in reverse osmosis pretreatment of purified water production line, the same attention should be paid to three problems: dosing of agents, dosing of flocculants and coagulants, dosing of reducing agents, etc.
The pure water production line for the raw water in the presence of organic and microbial sources, generally users often use oxidizing medium to kill, such as: sodium hypochlorite, liquid chlorine, chlorine dioxide.
For some surface water sources, the production line of purified water added the above medium for a long time, and found that biological resistance makes the effect not ideal. At present, the killing effect of non-oxidizing agent is longer and the cost of adding reducing agent can be saved.