Concentration factor
Concentration factor refers to the ratio of the concentration of substances due to evaporation in the circulating cooling water to the same substance content in the supplementary water, or the ratio of supplementary water volume to sewage volume. During the operation of circulating water, the water continuously evaporates. If the solution concentration exceeds the saturation solubility under the same conditions, salt precipitation will occur. Therefore, there is a certain limit to the concentration ratio of circulating water.
Application of concentration factor
The concentration factor is an important indicator of industrial circulating water. Nowadays, many places use chlorine, Ca2+, Na+, and K+ to measure. However, because chloride ions are artificially added, using chloride ions to express the concentration factor has little practical significance; Generally speaking, Ca2 is a scaling factor, and scaling will occur to a greater or lesser extent during the operation of circulating water, especially in the case of high concentration ratios. Therefore, the concentration ratio measured using Ca2 will be low; K ions in The solubility in water is quite large and will not precipitate during operation. At the same time, the K of the supplementary water is basically stable, so the concentration ratio measured by K is more accurate.
Precautions for concentration factor
Benefits of increasing the concentration factor of cooling water
- Increasing the concentration factor of cooling water can reduce the amount of supplementary water and save water resources;
- Increasing the concentration ratio of cooling water can reduce the amount of discharged water, thereby reducing environmental pollution and the amount of wastewater treatment;
- Increasing the concentration ratio of cooling water can save the consumption of water treatment agent, thereby reducing the cost of cooling water treatment;
Disadvantages of increasing the concentration factor of cooling water too much
- Excessively increasing the concentration factor of cooling water will cause the hardness and alkalinity of the cooling water to be too high, and the water’s tendency to scale will increase;
- Therefore, to ensure the treatment effect of cooling water, the concentration factor of cooling water must be controlled. Generally, the concentration factor of cooling water for central air conditioning is generally controlled at 4 to 5.