Guide for Selecting Industrial Water Treatment Chemicals, Avoiding These Common Mistakes

Industrial water treatment is an important link to ensure the stable production of enterprises and reduce operating costs, and chemical selection is the core of industrial water treatment. Choosing the right chemicals can effectively solve problems such as scaling, corrosion and microbial growth. Choosing the wrong ones may lead to poor treatment effects, equipment damage and even increased environmental risks. Combining with the actual needs of industrial water treatment, this article sorts out the core principles of chemical selection, points out common mistakes, and provides a practical selection guide for enterprises.

One of the core principles of chemical selection is "adapting to water quality". The water quality of industrial wastewater in different industries varies greatly. For example, chemical wastewater contains high-concentration organic matter and heavy metal ions, circulating water in the power industry has high hardness and high temperature, and printing and dyeing wastewater has the characteristics of high chroma and high COD. Therefore, it is necessary to conduct a comprehensive test of water quality before selection, and clarify key indicators such as suspended solids content, hardness, pH value, pollutant type and concentration in water. For example, when treating high-hardness circulating water, priority should be given to organophosphonate corrosion and scale inhibitors with high temperature resistance and h3 chelating ability; when treating oily wastewater, the flocculation effect of cationic polyacrylamide (PAM) is far better than that of anionic type.

Second, it is necessary to select chemicals in combination with "treatment goals and processes". The goals of industrial water treatment include water purification, recycling, and compliance discharge. Different goals correspond to different chemical selections. If the goal is the compliance discharge of wastewater, targeted chemicals should be selected according to the discharge standards. For example, for wastewater with excessive COD, oxidative chemicals (such as sodium hypochlorite, hydrogen peroxide) can be used together with flocculants; if the goal is scale and corrosion inhibition of the circulating water system, chemicals suitable for the operating parameters of the system (such as temperature, pressure, flow rate) should be selected to avoid chemical failure under high temperature and high pressure.

Economy and environmental protection are also important considerations for chemical selection. In order to pursue low costs, some enterprises choose low-quality chemicals with low prices. Although the procurement cost is reduced in the short term, it may lead to poor treatment effects, increased chemical consumption, and even corrosion of equipment, which will increase the later maintenance cost. At the same time, with the increasingly strict environmental policies, the environmental protection of chemicals has become more and more important. Priority should be given to chemicals with no secondary pollution and biodegradability, and chemicals containing heavy metals and highly toxic components should be avoided to prevent harm to the ecological environment.

In practical selection, enterprises often fall into some misunderstandings. Misunderstanding 1: Blindly following the trend to choose popular chemicals. There are differences in water quality and processes among different enterprises. The chemicals suitable for others may not be suitable for themselves. Blindly following the trend may lead to a significant reduction in treatment effect. Misunderstanding 2: Only focusing on the price of chemicals and ignoring treatment efficiency. Although high-quality chemicals have higher procurement costs, they have high treatment efficiency and low consumption, so the comprehensive cost is lower. Misunderstanding 3: Ignoring the compatibility of chemicals. Different chemicals may undergo chemical reactions when mixed, leading to chemical failure or even the production of harmful substances. Therefore, compatibility tests must be carried out before mixed use.

In short, the selection of industrial water treatment chemicals must follow the principles of "adapting to water quality, fitting the process, and considering economy and environmental protection", and avoid misunderstandings such as blind selection and only focusing on price. When necessary, technical support from professional water treatment enterprises can be sought, and the effect of chemicals can be verified through small-scale tests and pilot tests to ensure scientific and reasonable selection, and provide guarantee for the stable production and green development of enterprises.