Main features:

1. Removal of scaling material visible and tangible, improve the heat exchange efficiency.

2. High efficiency control of microorganisms to effectively reduce the risk of perforation corrosion.

3. Greatly save operating costs, return on investment cycle is short.

4. High degree of automation, simplified circulating water system management.

5. No pollutant discharge, no environmental pressure, recycled water reuse.

Main functions:

1. Can replace chemical agents, do not produce secondary pollution, environmental-friendly protection, drainage can be recycled without reprocessing.

2. Compared with chemical water treatment agents, it can save drainage ≥90%, save energy ≥18%, improve productivity ≥2%, and remove scaling substances ≥25% at a single time.

3. Efficient utilization of circulating water; Obvious effect of saving water and energy; environmental-friendly protection, and protection of water resources.

Common problems of circulating cooling water system

Problem 1: Precipitation and adhesion of scale

The concentration of calcium bicarbonate (Ca(HCO₃)₂) increases with evaporation concentration. When its concentration reaches the saturation state, or when the cooling water passes through the cooling tower and causes CO₂ to escape, calcium carbonate precipitates and deposits on the heat exchanger heat transfer surface in the form of scale, forming dense scale and reducing the heat exchanger heat exchange efficiency.

Problem 2: Corrosion of pipes and equipment

Corrosion is an electrochemical process. Corrosion is the oxidation of metal during electron transfer from anode to cathode potential. When the metal comes into contact with the dissolved oxygen cooling water, due to the heterogeneity of the metal surface and the conductivity of the cooling water, many corrosion microcells will be formed on the metal surface. After the REDOX reaction, the metal in the anode area will be continuously dissolved and corroded.

Problem 3: Scaling of high temperature heat exchanger

In the circulating cooling water system with multiple heat exchangers, the scaling problem of a high temperature heat exchanger cannot be solved by the overall water quality treatment. In order to take care of most heat exchangers adopted recycling water treatment scheme, but will cause the scaling of heat exchangers, thus become the bottleneck of circulating water system management.

Clean circulating cooling water treatment technology

Working principle of HF-Wn-SMXEST electrochemical water treatment system

Cooling water enters the reaction chamber and is coated in the cathode area and the anode area through electrochemical action to:

1) in the cathode area, pH=13, scale forming substances and biological slime are precipitated in solid form.

2) hydroxyl radicals, oxygen radicals, ozone and hydrogen peroxide were generated at pH=3 in the anode area, which further enhanced the bactericidal and algal killing effect of the water system.

3) in the anode region, chlorine ions are oxidized by point decomposition to form free chlorine or chloric acid.

4) descaling process: the electronic control system automatically wipes the scaling substances, drains and cleans. Built-in conductivity test circuit, automatically adapt to the conductivity fluctuation of water quality.

Economic benefit

1) increase the concentration ratio to achieve zero emissions; Reduce water supply, save 864,000 tons/year, save 2.592 million yuan/year.

2) stop using scale inhibitors and fungicides and save about 1.77 million yuan/year in drug costs.

3) with the improvement of circulating water quality, the efficiency of heat exchanger, especially condenser, is improved to reduce the coal consumption of power generation. The condenser vacuum is increased by 1Kpa, and the unit power is increased by about 1%, so the direct economic benefit of the unit increased annually is: 350,000 KW×5000h (annual utilization hour) ×0.25 yuan/KWH ×1%= 4.37 million yuan. Converted into standard coal consumption of 2-3g/ KWH.

4) reduce COD emissions by more than 50% to reduce the pressure of enterprise environmental emissions.