High temperature resistant industrial circulating water treatment equipment is a specialized water treatment system designed for high-temperature working conditions (usually water temperature ≥ 60 ℃, some equipment can withstand 100-150 ℃), mainly solving the three major problems of scaling, corrosion, and microbial growth in high-temperature circulating water, ensuring the efficient and safe operation of circulating water systems (such as boilers, chemical reaction vessels, high-temperature cooling towers, etc.). The following provides a detailed explanation of the core structure and main functions:
1、 Core structure (divided by functional modules)
1. Preprocessing unit (resistant to high temperature pollution)
High temperature resistant grille filter
Material: Made of 316L stainless steel or titanium alloy, with a filter aperture of 50-200 mesh, it intercepts large particles of impurities (such as rust, sediment, and pipeline debris) in the water to avoid clogging subsequent equipment.
Features: High temperature resistant seal (fluororubber or metal bellows seal), can withstand high temperatures above 150 ℃, and prevent leakage caused by temperature deformation.
High temperature self-cleaning filter
Construction: Stainless steel filter cartridge with rotating scraper or suction scanning device, equipped with differential pressure sensor (high temperature resistant type).
Function: When impurities are trapped in the filter and the pressure difference exceeds the set value (usually 0.1-0.2 MPa), the cleaning program will automatically start (without stopping), suitable for high-temperature circulating water with a high concentration of suspended particles (such as coking plants and metallurgical wastewater circulation systems).
2. Anti scaling treatment unit (core functional module)
High temperature scale inhibitor dosing system
Components: Temperature resistant medication storage tank (material: PPH or 316L stainless steel), high-temperature metering pump (piston or diaphragm type, temperature resistance ≥ 120 ℃), online mixer (static spiral structure, ensuring uniform mixing of medication and water).
Principle: High temperature resistant scale inhibitors (such as organic phosphonates and polycarboxylates) are added to prevent the deposition of scale such as calcium carbonate and calcium sulfate on pipelines and heat exchange surfaces at high temperatures by chelating calcium and magnesium ions or interfering with their crystallization process.
High temperature electronic descaling device (optional)
Construction: A high-frequency electromagnetic coil (wrapped in heat-resistant insulation material) wrapped around the outer wall of the pipeline, generating an alternating electromagnetic field of 20-50kHz.
Function: Change the crystal form of calcium and magnesium ions in water at high temperatures, forming loose flocs (rather than hard scale), which are discharged with water flow and suitable for chemical sensitive scenarios (such as high-temperature circulating water in food processing).
3. Anti corrosion treatment unit (suppresses high-temperature corrosion)
High temperature corrosion inhibitor dosing system
Drug type: Specialized corrosion inhibitors for high-temperature conditions (such as amines and imidazolines, with a temperature resistance of ≥ 100 ℃), which inhibit electrochemical corrosion by forming a dense protective film on the metal surface (high temperatures accelerate oxygen dissolution and metal oxidation reactions).
Control method: Linkage with online ORP (oxidation-reduction potential) sensors, real-time monitoring of corrosive substance concentration in water, automatic adjustment of corrosion inhibitor dosage, avoiding chemical waste caused by excessive dosage.
High temperature sacrificial anode or cathode protection device
Applicable scenarios: When the material of the circulating water pipeline or equipment is carbon steel, install zinc alloy or magnesium alloy sacrificial anodes (high-temperature resistant coating protection) to protect the main metal through corrosion of the sacrificial anodes; Alternatively, external current cathodic protection can be used, combined with titanium based mixed metal oxide anodes, to adapt to the electrochemical stability in high-temperature environments.
4. Microbial control unit (inhibits the proliferation of high-temperature bacteria)
High temperature ultraviolet sterilizer
Construction: Quartz sleeve (high-purity quartz, resistant to high temperatures above 120 ℃), high-power UV lamp (wavelength 254nm, suitable for killing high-temperature resistant bacteria such as Streptococcus thermophilus and actinomycetes), shell made of 316L stainless steel.
Features: Lamp life monitoring function (UV lamp attenuates faster in high temperature environments), automatically alarms when the UV intensity is below the set value, ensuring sterilization efficiency (bacterial killing rate ≥ 99.9%).
Oxidative fungicide dosing system (auxiliary)
Pharmaceutical selection: High temperature resistant oxidizing fungicides (such as peracetic acid and chlorine dioxide, which can maintain their bactericidal activity at high temperatures) are used, intermittently added (to avoid further metal corrosion caused by continuous addition), and synergistically treated with ultraviolet sterilization to prevent biofilm growth on high-temperature heat exchange surfaces.
5. Monitoring and Control System (Intelligent Core)
High temperature tolerant sensors: including online conductivity meter (monitoring total dissolved solids to prevent excessive concentration), pH meter (high-temperature electrode, monitoring water quality acidity and alkalinity), turbidity meter, temperature sensor, etc. All sensor probes are made of heat-resistant materials (such as sapphire, titanium alloy).
PLC control system: Real time collection of sensor data, automatic adjustment of the dosage of scale inhibitors, corrosion inhibitors, and bactericides, control the operation of self-cleaning filters, and trigger alarms or shutdown protection when parameters exceed the standard (such as abnormal temperature or high pressure).
Human machine interface: Touch screen displays circulating water temperature, pH value, remaining dosage of chemicals, equipment operating status, etc., supports historical data query and fault diagnosis, and facilitates remote monitoring by operation and maintenance personnel (optional 4G/Ethernet module).
6. Auxiliary equipment
High temperature circulating water pump: adopts mechanical seal (silicon carbide material friction pair), and the motor is equipped with high-temperature resistant bearings to ensure the power output of water circulation at high temperatures.
Expansion tank: Compensates for the volume expansion of water at high temperatures, maintains stable system pressure, and avoids damage to pipelines due to thermal expansion and contraction.
2、 Main function
1. Prevent scaling and improve heat transfer efficiency
Calcium and magnesium ions in high-temperature circulating water are prone to form hard scale (such as a sharp decrease in solubility of calcium carbonate above 60 ℃), which adheres to the inner walls of heat exchangers and pipelines, leading to increased thermal resistance and energy consumption (according to statistics, 1mm scale can increase energy consumption by 10-15%). The equipment uses scale inhibitor dosing or electronic descaling technology to suppress scale formation, ensure clean heat exchange surfaces, and maintain efficient system operation.
2. Inhibit corrosion and extend equipment life
High temperature accelerates metal oxidation reactions (for example, the corrosion rate of carbon steel in circulating water above 80 ℃ is 2-3 times that at room temperature), while the activity of corrosive ions such as chloride ions and sulfate ions is enhanced at high temperatures. The equipment forms a protective film on the metal surface through corrosion inhibitors and electrochemical protection, controlling the corrosion rate below 0.05mm/a (required by national standards) to avoid faults such as pipeline perforation and equipment leakage.
3. Control microorganisms to avoid biological contamination
High temperature environment (35-60 ℃) is an ideal breeding condition for thermophilic bacteria such as Legionella. Their metabolites (biofilm, slime) can clog pipelines, reduce heat exchange efficiency, and even pose safety risks such as Legionnaires’ disease. The equipment effectively kills microorganisms and controls the content of biofouling to ≤ 4mL/m ³ (industry standard) through UV sterilization and oxidative fungicides.
4. Maintain stable water quality and reduce operation and maintenance costs
By monitoring the concentration ratio of circulating water in real-time (usually controlled at 3-5 times), water quality deterioration caused by evaporation can be avoided, the frequency of replenishment and drainage can be reduced, and water resources can be saved; Meanwhile, intelligent control reduces manual intervention, lowers medication waste, and lowers equipment maintenance costs.
5. Ensure system safety and adapt to high temperature conditions
All components are made of high-temperature resistant materials and sealed technology, which can operate stably at extreme water temperatures of 60-150 ℃, meeting the water treatment needs of special scenarios such as industrial kilns, waste heat recovery systems, and high-temperature reaction vessels, and avoiding shutdown accidents caused by equipment intolerance to high temperatures.
summarize
High temperature resistant industrial circulating water treatment equipment is the “guardian angel” of the circulating water system under high temperature conditions. Through the full process design of “pretreatment anti scaling anti-corrosion sterilization intelligent control”, it solves the three major problems of scaling, corrosion, and microbial growth caused by high temperature, ensuring the efficient, safe, and long-term operation of the circulating water system. It is widely used in high-temperature circulating water scenarios in metallurgy, chemical industry, power, food processing and other fields. Its core value lies in adapting to high temperature environments, stabilizing water quality parameters, and reducing operation and maintenance costs. It is an indispensable auxiliary equipment in industrial production.
Post time: Jul-17-2025