1. Chemical industry: In chemical production, many chemical reactions and processes have strict requirements for the quality of compressed air. The filter dryer can prevent water and impurities from affecting the chemical reaction, avoid equipment corrosion, ensure the safety and stability of the production process, and improve the quality of chemical products.
2. Instrument control: Factory automation control systems, instruments and meters rely on accurate and stable compressed air operation. The compressed air filter dryer removes moisture and impurities, prevents the instrument components from rusting and clogging, ensures the accuracy of the instrument control, and ensures the smooth production process.
3. Painting industry: The painting operation of furniture, machinery and other products requires dry and clean compressed air. Otherwise, the moisture will make the coating appear pinhole, peeling and other defects, affecting the quality and beauty of the coating. The filter dryer can ensure uniform and smooth coating and improve the appearance quality of the product.
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Drying method
1. Condensation drying: Common refrigeration dryers cool the compressed air to a temperature below the dew point, so that the water vapor in the air condenses into liquid water. In this process, the compressed air is heat exchanged with the refrigerant through the refrigerant evaporator, the temperature is reduced, and the gaseous water is transformed into liquid water and separated from the air.
2. Adsorption drying: The adsorption dryer uses adsorption materials such as activated alumina, silica gel, molecular sieve, etc., to absorb the moisture in the compressed air. When compressed air passes through the adsorption tank, the moisture is adsorbed by the adsorbent, and the dry air enters the gas path. When the adsorption capacity of one adsorption tank is close to saturation, the other adsorption tank begins the regeneration process, which releases the adsorbed moisture by heating or reducing pressure, thus achieving continuous drying.
3. Membrane separation and drying: The membrane dryer uses special semi-permeable membrane materials to separate the moisture in the compressed air. When compressed air passes through a special membrane material, the moisture molecules are isolated on the membrane surface due to their molecular size and permeability properties, while the dry air enters the dried air route through the membrane material.
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FAQ
1. How often do I need to replace the filter element and desiccant?
Filter element is generally checked every 3-6 months and replaced according to the actual situation, if the use of poor environment, the replacement cycle should be shortened; The desiccant is usually replaced after the adsorption capacity decreases significantly or after a certain period of use, such as the car air dryer generally travels 50,000 kilometers or a year and a half later, if there is water in the air storage cylinder, the desiccant needs to be replaced.
2. How to determine whether the device is working properly?
By observing the pressure difference display, if the pressure loss increases, it may be that the filter element is blocked and needs to be replaced; You can also check the drainage condition, if the drainage is not smooth or no drainage, it may be blocked by the drainage valve or the internal fault of the dryer; In addition, observe whether the compressed air at the air outlet is clean and dry, if there is water or impurities, it indicates that the filtration and drying effect of the equipment is not good.
3. What should I do if the device fails?
Common faults such as excessive pressure drop may be blocked by filter element, pipeline leakage or pressure regulator failure, which need to be checked one by one; If the drying effect is poor, the desiccant may fail, the condensing system is faulty, or the drainage is poor. Repair or replace the parts according to the actual situation. If it cannot be solved by itself, contact professional maintenance personnel in time.
4. What are the safety precautions of the compressed air filter dryer?
There is a certain pressure inside the equipment when it is running, and non-professionals should not disassemble it at will. Check the pressure parts of the equipment regularly, such as the shell, pipes, etc., to prevent leaks or bursts. For refrigeration dryers that use electricity, pay attention to electrical safety to avoid electric shock accidents. In addition, when replacing the filter element or desiccant, be sure to cut off the air source first to release the internal pressure of the equipment to prevent accidents.
