Which parameter is the most important in the circulating water of chlor-alkali plants?

In chlor-alkali plants, the levels of pH and conductivity in the circulating water can indicate material leaks; for example, a leak of alkali may lead to an increase in both pH and conductivity. Hardness and chloride ions can both cause damage to equipment. This post was last edited by limingshuguang on 2008-2-18 13:48.]

All of these indicators will have an impact on the entire device. There are high levels of anions in the water; when the pH value is below 7, it causes severe corrosion to equipment and pipelines. The presence of large amounts of CL- and a significant amount of F- is the cause of pitting and crevice corrosion in materials; these forms of corrosion can cause considerable damage, and in severe cases, they may lead to perforations in equipment or pipelines. The presence of CL- and F- not only corrodes carbon steel but also penetrates the passivation film of stainless steel. The high conductivity is due to the high amount of salts present. Additionally, some equipment is made of stainless steel, while pipes are made of carbon steel or cast iron; these two materials with different potentials generate an electric current in the conductive medium, resulting in potential difference corrosion.

It can’t be said that one is more important; as indicators for water control, each one has its significance. In the process, pH and chloride ion content are typically used as the main control parameters.

Personal opinion: 1. Each indicator reflects the water quality of the circulating water; otherwise, what’s the point of conducting analysis? :Lol 2. If it’s simply circulating water used in chlor-alkali plants, it’s best to carry out chemical treatment and also install a side filtration system; this helps to stabilize the water quality and ensure that the heat exchange equipment in the system maintains a high heat exchange coefficient. Water treatment manufacturers will determine the chemical formula based on the specific characteristics of your heat exchange equipment. 3. Regarding the frequency of analysis, I don’t think it’s necessary to do it daily; we should do it once a month. It is normal for each position to monitor the pH value of the circulating water.

The poster already knows the impact of various factors on the device, so I won’t go into further detail. At present, most water treatment in circular systems relies on the use of chemicals. However, the use of such chemicals certainly causes some level of pollution to the water (although this pollution is currently negligible), and scaling can also occur over time. In fact, a high-voltage electrostatic descaling device can be considered. The exact principle isn’t very clear; it seems to involve creating a high-voltage electrostatic field in the circulating water tank to break down various types of dirt. (I’m not the manufacturer.) In 2007, our factory tried out a set of it, and the results were quite good; after about three months of use, no new dirt formed, and the existing dirt also began to come off. It’s just that the one-time investment is relatively high, at around 70,000 yuan per unit; each unit can handle 200 to 300 cycles of operation, and the operating costs are virtually negligible (with only 40W of power consumption per unit). I reiterate that, although it may seem like advertising, I am indeed not the manufacturer.