R & DKnowledge of pre precision filter and filter element in nitrogen making system
Article Source：Suzhou Shenyue Purification Website：www.szshenyue.comTime：2017-10-9Pageviews
：847
Core prompt：In the nitrogen machine system requirements are more stringent, such as pneumatic control system, a drop of oil can change the status of pores. Paralyzed the normally automated production line. Sometimes the oil will expand the sealing ring and cylinder o
Knowledge of pre precision filter and filter element in nitrogen making system
1. Why is the harm of oil in the air the biggest?
Answer: in the nitrogen machine system requirements are more stringent, such as pneumatic control system, a drop of oil can change the status of stomata. Paralyzed the normally automated production line. Sometimes the oil will expand the sealing ring and cylinder of the pneumatic valve, resulting in slow operation, serious or even blockage. In the air to complete the process, such as blow shaped pieces, oil will cause the appearance of the product defects or appearance of pollution; particularly terrible is that oil will be carbon molecular sieve pores to plug, reduce the nitrogen efficiency for a long time will lead to failure.
2. What are the main sources of oil pollution?
Answer: because most of the compressed air system uses the lubricating oil compressor, the machine will vaporize the oil into oil drops. It's formed in two ways:
The so-called dispersed droplets are produced by the shearing action of the piston compression or the rotation of the blades". Its diameter is from 1~5 to M.
The other one is in high temperature lubricating oil cooling mechanism, the formation of the "condensation vaporization type liquid droplets, the diameter is less than l M. the condensate oil droplets usually accounted for more than 50% of all the weight of oil, oil accounted for more than 99% the number of actual particles.
3. What is the working principle of the filter?
Answer: filter element is usually composed of fibrous media, filters, sponges and other materials, compressed air in the solid, liquid particles (drops) after filtering materials intercepted, condensed in the filter surface (inside and outside). The droplets and impurities accumulated on the surface of the filter element are precipitated by gravity to the bottom of the filter and then discharged by an automatic drainer or by an artificial discharge.
4. What are the characteristics of glass fiber materials used in filtration?
Answer: glass fibers can effectively separate lubricating drops from 50 to 0.0l m in diameter, which does not need to be absorbed or absorbed during filtration. And very effective, better than other materials.
5. What is the simple working process of an efficient condensing filter?
After compressed air enters the middle part of the filter, it is collected by gravity, collision, interception and infiltration. When the oil droplets are removed by the filter layer, they must be collected first. Small droplets of polymerizing large droplets of oil droplet mass polymerization is large enough, will settle to the bottom of the filtration layer. Then it flows into the filtration tank and is removed from the system by manual or automatic oil discharge device.
6. How are the filters classified?
Answer: the general filter grade can be divided into pre filtration, initial filtration, fine filtration and activated carbon filtration. The pre filter filter diameter 3 ~ 5 m particle diameter O.5 filter filter at the beginning of ~ 1 m 1ppm oil mist particles and residual content of W / W, fine filter filter 0.01 m diameter 0.0lppm oil mist particles and residual content of W / W. activated carbon filter is mainly used to remove the smell of oil and steam (the remaining oil mist content only 0.003ppm w / W).
7. What are the applicable conditions for different grades of filters?
Answer: pre filter is generally used in the downstream of the compressor (cooler), the use of occasions is not high. The primary filter is generally used for tools, motors, cylinders, etc.. Precision filters are generally used for painting, injection molding, instrumentation, control valves, transmission, agitation, electronic components manufacturing, nitrogen separation, etc.. Activated carbon filters are commonly used in food and drug manufacturing, breathing, air, gas processing, etc..
8. Why should the filter be matched?
A: the common misconception is that the single filter can meet the requirements and save money according to the required air quality to select a single filter that corresponds to the accuracy of the treatment. In fact, the air quality is determined by the single filter while the processing precision of the pretreatment of low level protection but no pre filter, high precision filter soon due to large load congestion, speed up the replacement frequency of the filter core, which will indirectly increase the cost of production.
9. What is the relationship between filter efficiency and air temperature?
Answer: the temperature of the oil and water in the compressed air affects the efficiency of the filter. For example, when the temperature is 30 degrees, the oil content through the filter is 5 times as much as 20 degrees; when the temperature rises to 40 degrees, the oil content through the filter is 10 times as much as 20 degrees centigrade. So the filter should be installed at the lowest point of the compressed air system.
10, what are the filter parts?
Answer: filter purchase parts generally include: internal automatic drainer, external automatic drainer, differential pressure meter, differential pressure meter, electronic pressure difference indicator and level indicator.
11. What is the use of filter parts?
A: the automatic drainage device and the external automatic drainer are used to filter the oil, water and dust mixture filtered out automatically from the filter core, so as to reduce the influence of human factors on the filtration efficiency of the system. The pressure differential meter, differential pressure gauge and electronic pressure differential indicator are used to guide the replacement of filter elements. Liquid level indicator is used to indicate the amount of mixed pollutants such as oil, water, dust and so on in the filter (monitoring the working condition of internal automatic drainer and guiding manual manual sewage discharge).
12. How to determine the replacement cycle of filter element?
Answer: the replacement cycle of the filter element is determined by its pressure drop. Generally, the pressure drop exceeds 0.68kgf/cm2, and the indicator of the filter pressure indicator points to the red area, or the work is 6000 - 8000 hours (one year)
To change. The activated carbon filter is replaced when the odor is detected downstream.
13, why should replace the filter cartridge periodically?
Answer: because the filter continued to be contaminated, will cause the gas flow in the system decreases and the pressure drop becomes higher, at the same time, energy and power consumption and therefore on the rise. As a result, operating and production costs, and increase the burden on the environment.
14, filter installation should pay attention to what aspects?
Answer: (a) the work pressure should not exceed the maximum pressure indicated by the filter.
(b) filter should be installed in the rear cooler and gas tank, as close as possible to the use point and the lowest point of temperature.
(c) the filter shall not be installed after the quick opening valve, and prevent backflow and shock.
(d) the filter should be installed vertically, and there is enough space left below to replace the filter.
(E) larger filters should be properly supported in the pipeline.
15, what is the key to replace the filter?
Answer: (a) isolation filter, close the intake valve or compressed air supply system, completely pressure relief and then close the vent valve (or closed)
Close the valve and drain completely through the filter drain hole.
(b) unscrew the shell and remove the old filter.
(c) cleaning the filter housing.
(d) a new filter (don't omit the sealing ring, filter should be installed tightly.)
1. Why is the harm of oil in the air the biggest?
Answer: in the nitrogen machine system requirements are more stringent, such as pneumatic control system, a drop of oil can change the status of stomata. Paralyzed the normally automated production line. Sometimes the oil will expand the sealing ring and cylinder of the pneumatic valve, resulting in slow operation, serious or even blockage. In the air to complete the process, such as blow shaped pieces, oil will cause the appearance of the product defects or appearance of pollution; particularly terrible is that oil will be carbon molecular sieve pores to plug, reduce the nitrogen efficiency for a long time will lead to failure.
2. What are the main sources of oil pollution?
Answer: because most of the compressed air system uses the lubricating oil compressor, the machine will vaporize the oil into oil drops. It's formed in two ways:
The so-called dispersed droplets are produced by the shearing action of the piston compression or the rotation of the blades". Its diameter is from 1~5 to M.
The other one is in high temperature lubricating oil cooling mechanism, the formation of the "condensation vaporization type liquid droplets, the diameter is less than l M. the condensate oil droplets usually accounted for more than 50% of all the weight of oil, oil accounted for more than 99% the number of actual particles.
3. What is the working principle of the filter?
Answer: filter element is usually composed of fibrous media, filters, sponges and other materials, compressed air in the solid, liquid particles (drops) after filtering materials intercepted, condensed in the filter surface (inside and outside). The droplets and impurities accumulated on the surface of the filter element are precipitated by gravity to the bottom of the filter and then discharged by an automatic drainer or by an artificial discharge.
4. What are the characteristics of glass fiber materials used in filtration?
Answer: glass fibers can effectively separate lubricating drops from 50 to 0.0l m in diameter, which does not need to be absorbed or absorbed during filtration. And very effective, better than other materials.
5. What is the simple working process of an efficient condensing filter?
After compressed air enters the middle part of the filter, it is collected by gravity, collision, interception and infiltration. When the oil droplets are removed by the filter layer, they must be collected first. Small droplets of polymerizing large droplets of oil droplet mass polymerization is large enough, will settle to the bottom of the filtration layer. Then it flows into the filtration tank and is removed from the system by manual or automatic oil discharge device.
6. How are the filters classified?
Answer: the general filter grade can be divided into pre filtration, initial filtration, fine filtration and activated carbon filtration. The pre filter filter diameter 3 ~ 5 m particle diameter O.5 filter filter at the beginning of ~ 1 m 1ppm oil mist particles and residual content of W / W, fine filter filter 0.01 m diameter 0.0lppm oil mist particles and residual content of W / W. activated carbon filter is mainly used to remove the smell of oil and steam (the remaining oil mist content only 0.003ppm w / W).
7. What are the applicable conditions for different grades of filters?
Answer: pre filter is generally used in the downstream of the compressor (cooler), the use of occasions is not high. The primary filter is generally used for tools, motors, cylinders, etc.. Precision filters are generally used for painting, injection molding, instrumentation, control valves, transmission, agitation, electronic components manufacturing, nitrogen separation, etc.. Activated carbon filters are commonly used in food and drug manufacturing, breathing, air, gas processing, etc..
A: the common misconception is that the single filter can meet the requirements and save money according to the required air quality to select a single filter that corresponds to the accuracy of the treatment. In fact, the air quality is determined by the single filter while the processing precision of the pretreatment of low level protection but no pre filter, high precision filter soon due to large load congestion, speed up the replacement frequency of the filter core, which will indirectly increase the cost of production.
9. What is the relationship between filter efficiency and air temperature?
Answer: the temperature of the oil and water in the compressed air affects the efficiency of the filter. For example, when the temperature is 30 degrees, the oil content through the filter is 5 times as much as 20 degrees; when the temperature rises to 40 degrees, the oil content through the filter is 10 times as much as 20 degrees centigrade. So the filter should be installed at the lowest point of the compressed air system.
10, what are the filter parts?
Answer: filter purchase parts generally include: internal automatic drainer, external automatic drainer, differential pressure meter, differential pressure meter, electronic pressure difference indicator and level indicator.
11. What is the use of filter parts?
A: the automatic drainage device and the external automatic drainer are used to filter the oil, water and dust mixture filtered out automatically from the filter core, so as to reduce the influence of human factors on the filtration efficiency of the system. The pressure differential meter, differential pressure gauge and electronic pressure differential indicator are used to guide the replacement of filter elements. Liquid level indicator is used to indicate the amount of mixed pollutants such as oil, water, dust and so on in the filter (monitoring the working condition of internal automatic drainer and guiding manual manual sewage discharge).
12. How to determine the replacement cycle of filter element?
Answer: the replacement cycle of the filter element is determined by its pressure drop. Generally, the pressure drop exceeds 0.68kgf/cm2, and the indicator of the filter pressure indicator points to the red area, or the work is 6000 - 8000 hours (one year)
To change. The activated carbon filter is replaced when the odor is detected downstream.
13, why should replace the filter cartridge periodically?
Answer: because the filter continued to be contaminated, will cause the gas flow in the system decreases and the pressure drop becomes higher, at the same time, energy and power consumption and therefore on the rise. As a result, operating and production costs, and increase the burden on the environment.
14, filter installation should pay attention to what aspects?
Answer: (a) the work pressure should not exceed the maximum pressure indicated by the filter.
(b) filter should be installed in the rear cooler and gas tank, as close as possible to the use point and the lowest point of temperature.
(c) the filter shall not be installed after the quick opening valve, and prevent backflow and shock.
(d) the filter should be installed vertically, and there is enough space left below to replace the filter.
(E) larger filters should be properly supported in the pipeline.
15, what is the key to replace the filter?
Answer: (a) isolation filter, close the intake valve or compressed air supply system, completely pressure relief and then close the vent valve (or closed)
Close the valve and drain completely through the filter drain hole.
(b) unscrew the shell and remove the old filter.
(c) cleaning the filter housing.
(d) a new filter (don't omit the sealing ring, filter should be installed tightly.)
Keywords：PSA Hydrogen Production，Nitrogen making machine in metallurgical industry
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