The stability of the quality of circulating water
cooling tower, in a separate use hydraulic drainage method and make the filling water volume is too big or little, should consider using chemical treatment and combination of water drainage water quality treatment.
Water chemical treatment plan should include the following contents: on the reagent type and quantity of cast with intermittent or continuous batching ways, the choice of coagulant dosage cases drainage plus points, etc.
The determination of these problems should be according to the types of pollution and the specific circumstances, to make economic comparison of different schemes, and appropriate USES of chemical analysis, determination of bacterial count to identify the effect of water treatment, the scheme to selected economic and effective method of chemical treatment.
Handling of scale formation of circulating water, can use phosphate, metaphosphate or lime treatment, are keeping water carbonate hardness test within certain limit.
Used to use processing of furnace smoke, can't maintain the condenser fouling, but easy to cause water tower water spray packing scale, now has many not be adopted.
Using phosphate treatment, generally maintain the condenser cooling water acid radical is 1 - population
3 mg/l.
For the processing of producing microbial growth, more commonly used chlorination, less investment and gains, and drain the water chemical composition is 'short-lived', is expected to the sewage from therefore form a 'public nuisance'.
General use bleach chlorine way, also can be used to add to the water dropping liquid nitrogen atmosphere machine.
Number of chlorine, time and dosage should be determined by test, generally should be controlled export condenser cooling water content of active chlorine in 0.
2 -
0.
5 mg/l range.
For metal corrosion ferrous sulfate can be used as a preservative treatment commonly.
Using sodium tripolyphosphate (
Na,P,O)
Treatment of circulating water scaling to the topic, in some power plants obtained good effect in practice.
A certain power plant water supplement carbonate hardness in 5 x10 -
3 mol/l, water spray packing and condenser copper pipe scaling are very serious, three years later to check in using sodium tripolyphosphate processing, fouling problem basically solved.
Domestic water quality stability treatment of circulating water in the past, many simply from the perspective of scale, and the corrosion and microbe.
Design unit only with increasing spare equipment coefficient, increase equipment corrosion allowance method to solve, and the result is still in a passive state.
Stable water quality of circulating water treatment work in recent years have made a lot of attention, the research and application has achieved a lot of achievements.
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