In China's industrial boiler is widely used in chemical industry, food, brewing, heating, paper making, printing and dyeing, rubber and other industries. So, what is the purpose of these industrial boiler water supply testing?Industrial boiler water can not contain a large amount of calcium, magnesium and other sulfate, if the hardness and alkalinity of the boiler water is not up to standard, it will make the scale inside the boiler, affecting the use effect of the boiler. The scaling of the boiler heating surface will also reduce the thermal efficiency, plug the pipe, and cause waste. It will also make the boiler heating surface metal overheating and damage, such as bulge, pipe explosion, etc., and will also produce metal corrosion, and even reduce the service life of the boiler. Therefore, the water supply detection of the industrial boiler is essential for the safe operation of the boiler. What does industrial boiler feed water to detect index to have?
1. Suspension
Suspsuspension refers to the content of water-insoluble solid mixture separated after filtration. The higher the suspended matter content, the more cloudy the water becomes. For small industrial boilers, such as clear tap water is used as the water source, the content of suspended matter may not be monitored in operation.
2. Total hardness
Total hardness usually refers to the total content of calcium and magnesium ions in water, which is an important index to prevent boiler scaling; for the boiler, the smaller the hardness of water is more conducive to prevent scaling.
3. Total alkalinity
Total alkalinity refers to the content of a class of substances that can accept hydrogen ions in the water. Because the alkalinity material can react with the hardness material, forming loose water slag, can be removed with the sewage, so as to prevent the boiler scale, so the industrial boiler pot water must maintain a certain alkalinity. But the pot water alkalinity is too high, easy to affect the quality of steam, sometimes also cause alkaline corrosion.
4. pH
The PH value, the negative logarithm of the hydrogen ion concentration, is an indicator of the acid and alkalinity of the solution.
The pH values ranged from 0 to 14, and were neutral for pH=7, acidic for pH <7, and alkaline for pH> 7. Usually requires the boiler water quality to reach a certain alkaline, which is conducive to corrosion and scale prevention.
5. Dissolution of oxygen
Dissolved oxygen refers to the oxygen content dissolved in the water.
Disdissolved oxygen in water is easy to cause corrosion of boiler equipment and water supply pipe, so it should be removed as far as possible.
6. Evaporate residue
The evaporation residue approximately represents the total salt content in the water. The change of the content of dissolved solid in the pot water can directly reflect the concentration degree of the water in the pot. When the content is too high, it is easy to cause a large amount of steam with water, deteriorate the steam quality, and steam will occur in serious cases.
7.SO32- (sulfite)
This index is set for the use of sodium sulfite to remove oxygen boiler, the pot water without sodium sulfite without sulfite.
The above reasons explain the purpose of water supply testing for industrial boilers, If the enterprise chooses the boiler water quality detector, it can choose various forms of boiler water quality testing and analysis instruments produced and sold by Erun Environmental Protection Group, It is recommended to use the bench-top boiler water quality tester ERUN-ST series, This set of equipment refers to GB / T 1576-2018 Industrial Boiler Water Quality design, Ability to detect PH, hardness, turbidity, dissolved oxygen, iron, phosphate, pholphthalalkalinity, oil and other parameters, Not only can it be used in hot water boilers, It can also be used for steam boiler, soda water dual-use boiler pot water, feed water, return water, softened water, remove brine and other water determination.
