Heat Exchanger Cleaning Agent
In the heat exchanger circulating cooling water contains a large number of salts, corrosive products and a variety of microorganisms, even if the treated water also contains different degrees of dissolved solids, gases and a variety of suspended matter, the presence of these substances will cause problems such as deposition, corrosion, microbial (algae, slime) reproduction and so on After the heat exchanger has been running for some time, the water side will have a lot of calcium and magnesium carbonate scale and microorganisms silt, etc , these dirt firmly attached to the surface of the copper tube, resulting in deterioration of heat transfer, cyclic pressure rise, affecting the operating efficiency of the unit, resulting in greater economic losses The existence of these problems will bring harm to the safe operation of the equipment
A, the use of products
Heat exchanger cleaning agent can quickly and thoroughly remove all kinds of heat exchanger dirt, while improving the corrosion resistance of metal surface, suitable for various types, various materials of heat exchangers, condensers, evaporators and absorbers of circulating water system and low-temperature water system, hot water boiler and diesel generator set cooling clamp and other equipment. Applicable materials: copper, Copper-nickel alloy, carbon steel, aluminum, titanium and stainless steel and other materials.
B, the performance characteristics
1. Taking full account of the user's specific situation, the heat exchanger cleaning agent is a kind of organic acid cleaning agent, which is composed of main cleaning agent, bactericidal algicide, dispersive penetrant and high-efficiency corrosion inhibitor, no additives need to be added when using, simplify and facilitate the installation and operation of the cleaning site.
2. High corrosion inhibition efficiency, fast cleaning speed, etc., cleaning liquid waste treatment is simple and convenient, is conducive to the pre-film of copper material after cleaning.
3. Can effectively inhibit the puppet corrosion of copper alloy-carbon steel composite parts of copper pipe in the pickling process. Strong ability of anti-Fe3+, Cu2+ accelerated corrosion.
4. The selected cleaning and descaling main agent of heat exchanger cleaning agent is organic series. It is safe for equipment, complete descaling, low corrosion rate, basically not corrosive, toxic to the operators, simple operation, safe and reliable. At the same time, this product does not contain toxic and harmful substances, after simple treatment can be discharged, safe and environmentally friendly. The product use solid components, and is safe and easy to use, no damage to people, no corrosion to equipment, no impact on the environment.
5. With the air conditioning cleaning module supporting the use, can ensure the quality of cleaning, reduce labor intensity, conducive to the direct use of users and the regular cleaning and maintenance of air conditioning equipment, saving equipment maintenance expenses.
6. In the cleaning process, H+ will produce corrosion and hydrogen embrittlement phenomenon to the metal body, so the cleaning agent should add the corresponding corrosion inhibitor. Dissolved Fe3+, Cu2+ and other oxidizing ions will cause the metal body pitting, copper plating and other phenomena, so the cleaning liquid also need to add masking agent.
C, Physical and chemical indicators
Project | Indicators | Project | Indicators |
State | Powder solids | Density | >1.5 |
Color | White or light red | Acid and Alkaline | Acid |
Smell | Tasteless | Corrosive | Slightly corrosive |
Combustible | No, it doesn't explode. | Toxicity | Non – toxic |
Cleaning performance | Excellent | Corrosion inhibition Performance | Excellent |
D, How to use
Disconnect other systems that are not related to the cooling coil and connect cleaning tank, cleaning pumps and cooling coil into a closing loop of cleaning.
Chemical cleaning Process:
Water flushing → pickling and descaling → water flushing → passivation treatment
4.1 Water flushing (leak detection)
The purpose of water flushing is to check the leakage of the cleaning system in the simulated cleaning state, and to remove the loose dirt in the coil. When the outlet flushing water is visually free of large particulate impurities, the water rinse ends.
4.2 Pickling and descaling
After the water rinse, the "heat exchanger cleaning Agent" is added in the cleaning tank to control the concentration of the main agent in the 3~6%, the temperature in the range of 50~60℃, in the system for circulating cleaning decontamination, cleaning time of about 2-3 hours. Regularly use pH test paper to measure the pH value of the acid, so that it remains below 1, when the pH value in half an hour tends toStable value and cleaningWhen no gas is released in the system, the pickling process ends.
Monitoring items: PH value 20 minutes;/1 times
4.3 Water flushing, waste liquid treatment
After the cleaning process is completed, rinse water, rinse residual silt and residue, and use "medium and treatment agent" in the sewage tank to process and treat the waste liquid (pH value 6~7). When the exit of the visual impurities is not much, and the pH value is greater than 6 o'clock end of water flushing, pH value with a wide range of pH test paper detection.
Monitoring projects:
Medium and processing pH value 1 times/10 minutes
Water rinse pH value 1 times/10 minutes
4.4 Passivation treatment
After water flushing is qualified, the "passivation Pre-membrane agent" is added to the passivation treatment to improve the corrosion resistance of the copper pipe. After mixing the whole system solution concentration evenly, stop the circulation and soak for 2-3 hours. The passivation solution is excluded from the system and then discharged in the "Yunqing card-Medium and treatment agent" and after treatment (pH 6~7), the cleaning process ends.
Monitoring projects:
Circulating batching process pH value 1 times/10 minutes
Medium and processing pH value 1 times/10 minutes
4.5 Cleaning effect
After cleaning, open the cleaning system, from the cooling coil mouth to observe, the surface of the tube should be clean, no residual dirt, no point erosion, no zinc corrosion and other phenomena, after chemical cleaning, copper pipe should not occur leakage phenomenon.
E, Precautions
Store in a cool place, sealed and preserved for a long time.
