Boiler water for water treatment, boiler water treatment method

Treatment characteristics Boiler water treatment does not require complex equipment, so the investment is small, the cost is low, and the operation is convenient. The boiler dosing treatment method is the most basic water treatment method, and it is also the continuation and supplement of chemical water treatment outside the pot. After the water treatment outside the pot, there may be residual hardness, in order to prevent the boiler from scaling and corrosion, still add a certain amount of water treatment agent.

Boiler water treatment can not completely prevent the formation of scale in the boiler, especially the generated mud scale, which is easy to form secondary scale in the timely discharge of the blowdown. The boiler dosing treatment method has no pollution to the environment, it is not like ion exchange and other water treatment methods, how many impurities are disposed of in natural water, how many impurities are discharged after regeneration, and a large number of remaining regeneration agents and regenerated products are discharged. The boiler dosing treatment method is to turn the main impurities in the water into insoluble sludge, which will not cause pollution to nature.

When the hardness of the feed water is too high, a large amount of water slag will be formed, which will speed up the scaling speed of the heat transfer surface. Therefore, it is generally not suitable for high hardness water quality.

Whether the boiler can operate safely and economically, circulating water treatment is very important. If the boiler feed water is not treated or treated improperly, it will inevitably scale on the heating surface, which will make the heat transfer performance of the furnace wall low, increase fuel consumption, and also produce corrosion, pipe burst, and even cause accidents. Especially in areas where the hardness of raw water quality is high.

The application of complete sets of steam boiler softened water equipment is of great significance to ensure the safe and economical operation of the boiler, improve the efficiency of the boiler, extend the service life of the boiler, and save energy.

One. Ion exchange method: the use of a specific cation exchange resin to replace the calcium and magnesium ions in the water with sodium ions, because the solubility of sodium salt is very high, so it avoids the formation of scale with the increase of temperature.

1. Features and effects: the effect is stable and accurate, the process is mature, and the hardness can be reduced to 0.

2. The scope of use and guessing: the most commonly used standard methods in catering, food, chemical and middle-aged workers, medicine and other fields, air conditioning, industrial circulating water and other applications.

Two. Membrane separation method: both nanofiltration membrane and reverse osmosis membrane can intercept calcium and magnesium ions in water, thereby fundamentally reducing the hardness of water.

1. Characteristics and effects: the effect is obvious and stable, the treated water has a wide range of applications, has higher requirements for inlet pressure, and has high equipment investment and operating costs.

2. Scope of application: Generally less used for special softening treatment.

Three. Lime method: Lime is added to the water.

1. Characteristic effect: the hardness can only be reduced to a certain range.

2. Scope of application: high hard water with large flow rate.

Water treatment in the boiler is an important part of ensuring the safety of boiler operation and improving the efficiency of thermal energy utilization. The following are the steps and methods of general boiler furnace water treatment:

Water quality test: First of all, the water quality in the boiler furnace needs to be tested, including pH value, dissolved oxygen, hardness, alkalinity, total alkalinity, chloride ion content and other indicators. These test results will provide the basis for subsequent water treatment programs.

Water Replenishment System: Ensure that the water quality of the water replenishment system meets the requirements and avoid introducing harmful ions or substances into the boiler. Equipment such as reverse osmosis membranes and ion exchangers can be used to pre-treat the make-up water to remove suspended solids, dissolved solids, and dissolved gases.

Oxygen removal: Remove dissolved oxygen in the water in the boiler by deaeration equipment or chemical deoxidizer to prevent oxygen corrosion. Commonly used deoxidation methods include mechanical deaeration and chemical deoxygenation.

Corrosion inhibitor addition: Corrosion inhibitors are added to the boiler to reduce corrosion on metal surfaces. Corrosion inhibitors can form a protective film that reduces the chemical reaction between metal and water.

Cleaning and blowdown: Regularly clean and drain the boiler to remove sediment and dirt from the boiler. This can be done by methods such as chemical cleaners, mechanical brushing, or rinsing.

pH Regulation: According to the water quality test results, the pH value of the water in the boiler furnace is appropriately adjusted, usually within the appropriate range, to prevent the occurrence of acid or alkali corrosion.

Control water level and concentration: According to the boiler design requirements and operating status, control the water level and concentration in the boiler to ensure the safe operation of the boiler and the efficiency of thermal energy utilization.

Regular inspection and maintenance: Regularly inspect and maintain the water in the boiler furnace, including checking the water quality, cleaning the equipment, replacing the chemical agent, etc. Detect and deal with problems in time to prevent boiler failure and damage.

The above steps and methods are for reference only, and the actual boiler water treatment scheme needs to be specifically designed and adjusted according to the boiler type, working conditions and water quality characteristics. It is recommended to consult a professional boiler engineer or water treatment expert when carrying out boiler furnace water treatment to ensure the treatment effect and the safe operation of the boiler.

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The task of boiler water treatment is, in short, to carry out correct purification treatment of boiler water and strict supervision of steam and water quality, so as to ensure that the boiler water vapor system has good water quality and prevent scaling, salt accumulation and corrosion of the boiler and thermal system.

1.Purification of water quality: preparation of make-up water that meets the quality requirements required for boiler production, that is, water treatment outside the furnace;

2.Furnace water treatment: feed water deaeration and furnace water scale inhibition, etc.;

3.Water vapor quality supervision: laboratory analysis of various water quality, guidance of boiler sewage discharge and regular water discharge;

4.Boiler anti-corrosion: Formulate boiler protection measures according to the length of the boiler.