What are the hazards of unclean compressed air?

The compressed air discharged from the air compressor contains many impurities: water, including water mist, water vapor, condensate; oil, including oil stains and oil vapors; Various solid substances such as: rust mud, metal powder, rubber fines, tar particles and filter materials, sealing materials, etc.; In addition, there are a variety of harmful chemical ambiguous substances.

Deterioration of lubricating oil (oil) will cause rubber, plastic, sealing materials to deteriorate, block small holes, cause valve failure, polluting products: moisture and dust will cause rust and corrosion of metal devices and pipelines, cause moving parts to be stuck or worn, make pneumatic components malfunction and air leakage, moisture and dust will also block throttle holes or filters; In cold regions, freezing of moisture can cause pipes to freeze or freeze crack.

The hazards of water in compressed air are summarized as follows:

1. The water in the compressed air is easy to corrode the pipeline, thereby shortening the service life of the pipeline.

2. The water in the compressed air is mixed with oil and dust, which is easy to block the pipeline.

3. The water in the compressed air will reduce the purity of the production materials and affect the production quality of the products.

4. The water in the compressed air is easy to form the phenomenon of "water hammer" without drying, which destroys the gas-using equipment.

5. The water in the compressed air will affect the running speed of the equipment and lead to low production efficiency.

These hazards have a significant impact on production and equipment, so the DPC recommends that the compressed air must be dried. The moisture in the compressed air is usually dried by a refrigeration dryer or an adsorption dryer, and the two need to be selected according to the user's own requirements, but if you want to get drier compressed air, you need to use an adsorption dryer.

I can blow it, but I do not show it quickly if I want to change it thoroughly. There is residue in the machine, add more money, and the oil will be released after a while. Gearbox.

This is the principle of oil change in the circulating machine.

Whether the compressed air should be treated or not is the effect, and the use of compressed air is the cause.

1. Do you want to treat compressed air?

Nowadays, compressed air has been used in all walks of life in industrial production, air compressors and devices that use compressed air as power can be seen everywhere, different occasions demand for compressed air quality, and then in the process of using compressed air, different treatments are needed for compressed air, and the main impurities contained in compressed air are: solid particles, water, oil, bacteria. Different industries have different requirements for compressed air.

2. To what extent does the compressed air need to be treated?

ISO8573 stipulates the specific level of compressed air, and users can configure the corresponding compressed air after-treatment equipment such as filters, refrigeration dryers, suction dryers, and degreasing purifiers according to the specific use level.

1. The productivity of the enterprise declines: due to the pneumatic components being polluted by oil, water and dust, the action is not in place, and the design requirements cannot be met.

2. Increase in product defect rate: direct contact between oily and water pollutants and products will affect product quality.

3. Increase in production cost: due to the corrosion of compressed air pipelines and valves, the pressure drop of the system increases, and the energy consumption of gas supply is improved.

4. Increase the maintenance cost of production equipment: due to water and deterioration oil, it will cause damage to the pneumatic components in the equipment, thereby increasing the maintenance cost.

5. Shorten the life of the equipment: not only shorten the life of the compressed air system equipment, but also due to the entry of oil and water impurities, it will cause some damage to the production equipment and affect its use.

Therefore, the purification of compressed air is a matter of great importance for equipment managers and production personnel. For the purification of the three main impurities in the compressed air, the following means are mainly relied on:

Water purification - water removal is carried out through refrigeration dryers, adsorption dryers, gas-water separators, air storage tanks, and finally discharged through drain valves.

Oil purification - it is explained here that even the imported filter cannot completely remove the oil, and the degreasing of the filter is mainly reflected in the liquid oil. A good filter can basically remove the liquid oil, but it cannot remove the gaseous oil. When the gaseous oil accumulates in the dead end of the air system and converges into liquid oil, it should be carried out by a compressed air degreasing purifier, which can remove all the oil in the compressed air through catalytic oxidation technology.

Dust purification is mainly carried out by means of precision filters.

The water and dust contained inside can damage the pneumatic parts, reduce the service life, cause equipment failure, and cause losses.

Compressed air is a process gas source with a variety of purposes, widely used in: petroleum, chemical, metallurgy, electric power, machinery, light industry, textile, automobile manufacturing, electronics, food, medicine, biochemistry, national defense, scientific research and other industries and departments, in the process of compressed air manufacturing, the temperature is often gradually reduced. At the beginning, because the compressed air has a high heating temperature, the moisture in the air protects the vaporization state, and the heat exchange occurs in the surrounding environment when flowing in the pipeline, which will slowly cool down the compressed air, and the lower the air temperature (ambient air temperature), the more likely the water vapor in the compressed air is to condense.

When the compressed air is released from the discharge port in use, the pressure suddenly decreases, the volume expands, and the temperature decreases, which will cause the water vapor in the compressed air to further condense into water.

Hazards caused by the presence of moisture in compressed air:

Condensate on pneumatic equipment can carry the lubricating oil away, reducing the efficiency of the equipment or even damaging it.

Condensate can also accelerate the wear of valves in the line.

Condensate can also accelerate the wear of valves in pipelines, causing gas control equipment to malfunction or misfunction; The pipeline and equipment will be corroded, and if water freezes at the low point of the pipeline, the pipeline will also be in danger of bursting.

The presence of water mist in the compressed air used for spraying can affect the adhesion of the paint to the workpiece, resulting in painting failure.

Contamination of oil in compressed air causes hazards:

The oil in the compressed air is more than air, and some are because the air compressor used needs to be lubricated with lubricating oil.

When the compressor is severely worn or the temperature is high, it will also cause the lubricating oil to mix into the compressed air, which will cause many problems for the operation and maintenance of the equipment.

If the oil vapor content in the air is too high, and the air temperature is high during the compression process, exceeding its limit, it will cause ** or combustion.

Air spraying with oily compressed air will cause the coating film to shrink and wrinkle into an orange peel shape due to the interaction between the oil stain and the coating, and the gloss and durability of the coating film will deteriorate, which will seriously affect the coating quality.

Therefore, before entering the manufacturing system, it is necessary to remove water, impurities, oil, particles and pollutants from the compressed air, and use pure compressed air.

Compressed air is mainly obtained by compressing the air through the air compressor, and the discharged air contains a lot of impurities, which are mainly composed of water, oil and particle impurities, if it is not treated and used directly, the impurities in the air will cause great harm to the components in the system, so that the maintenance cost of the equipment rises, the service life is shortened, and the product is scrapped due to serious pollution. At the same time, the compressed air contains moisture of relative humidity, and with its cooling in the pipeline, its moisture will be precipitated, and if there is moisture in the compressed air system, it will bring many disadvantages to the user, as follows:

1. First of all, it is necessary to increase the operation and maintenance costs, that is, the maintenance costs of instruments, solenoid valves, cylinders and other components will rise;

2. The work efficiency of the equipment is low, and it may cause production interruption;

3. The equipment investment cost of the whole production line increases, 4. It is necessary to add condensation, separation, sewage and other equipment in the system;

5. Process quality, especially for painting, sandblasting, pneumatic control system, food, pharmaceutical and other industries, will directly affect the product quality due to the high moisture content of compressed air.

Compressed air is used in a wide range of applications, including the following:

Machinery manufacturing industry: such as machining center program control, parts testing, equipment testing, automobile assembly, oxygen and nitrogen production equipment, production lines, spraying and industrial robots, etc.;

Metallurgical industry: such as metal smelting, continuous casting and rolling production lines, etc.;

Light industry: such as textiles, household appliances, printing, packaging, furniture, cigarettes, food, medicine, glass production, etc.;

Electronics: production of electronic products, experimental test process, control and testing of precision instruments, etc.;

Chemical industry: transportation of chemical raw materials, filling of harmful liquids, oil drilling, etc.;

Electric power industry: auxiliary equipment control of power plants, coal transportation, ash removal, industrial water treatment support, etc.

DPC has you covered; The main hazards of compressed air quality substandard 1, the air source is not up to standard, resulting in serious damage to pneumatic components, increasing the purchase cost of spare parts.

2. Damage to pneumatic components leads to an increase in maintenance costs.

3. The damage of pneumatic components leads to an increase in downtime losses and increases production costs.

4. The failure of pneumatic components leads to an increase in the processing defect rate of the equipment, thereby increasing the cost.

5. The service life of the main body of the equipment is shortened due to the long-term influence of moisture, and the investment cost of the enterprise increases.

6. The spraying industry and other industries where the products are in direct contact with compressed air will cause poor products due to the quality of the air source.

7. Other intangible and tangible losses will be brought to the gas source if the gas source is not up to standard.

It will produce a large amount of waste for industrial products.

If the compressed air is not up to standard, there are water and oil contaminants. First of all, there are certain hidden dangers in the compressed air system, and the oil and water are concentrated in the gas storage tank, which will have the best hidden dangers. Secondly, oil and water pollutants will cause pollution to valves and pipelines, resulting in valve failure, inadequate operation of gas equipment, and excessive microorganisms in pipelines.

At this time, it is recommended to use equipment such as compressed air degreasing purifiers, and you can also replace oil-free air compressors, which is costly.

1. Decline in production capacity: pneumatic equipment and pneumatic tools will fail due to the moisture in the compressed air pipeline and fail to meet the design requirements.

2. Deterioration of equipment function: moisture will greatly reduce the accuracy and operation efficiency of the equipment, such as slow action of the cylinder, damage to the solenoid valve, etc.

3. The defective rate of products increases: the moisture content is too high, resulting in unqualified products, and the defective rate increases, such as painting, electronic product processing and production.

4. Aerodynamic loss: the compressed air pipeline is corroded, resulting in a pressure drop and a large pressure difference, which affects the safety of production.

5. Production equipment failure: moisture will cause damage to the pneumatic components in the pneumatic equipment, resulting in equipment failure.

6. Shortening the life of the equipment: moisture accelerates the corrosion of the production equipment, which leads to the shortening of the life of the production equipment. 、

If you want to improve the quality of compressed air, you need to install a core adsorption dryer and a high-efficiency precision filter in the compressed air system to purify and remove water, so that the quality of compressed air meets the standard.

The compressed air from the compressor will contain a lot of impurities if it is not treated, which will cause great harm to the compressed air.

1.If the compressed air is not treated, it will cause the lubricating oil to deteriorate, lead to the deterioration of the plastic material, block the small holes, cause the valve to malfunction, and cause pollution to the product.

2.The poor compressed air quality directly leads to a shorter service life of the equipment, a longer maintenance cycle in the later stage, and an increase in costs.

3.Cause rust in pipelines, rust in metal devices are caused by the absence of compressed air, because there is moisture and dust in the air source, it will cause moving parts to be stuck or worn for a long time, pneumatic parts leakage or action failure, in addition to the filter screen and throttling holes to cause blockage, and in a very low temperature environment, the moisture in the compressed air freezes, resulting in pipeline freezing and freezing.

1. Hazards in compressed air:

When the air is compressed by the air compressor, the amount of water vapor and dust contained in the unit volume rises sharply. At the same time, during the compression process, the water vapor in the air and the oil mist condense into small droplets, which are then mixed with highly concentrated dust to form mostly acidic oil sludge.

2. The influence of unclean air after compression:

a. The frequency of damage to the customer's pneumatic tools and pneumatic equipment increases, and the service life decreases.

b. The contact between the untreated compressed air and the material will directly lead to the damage of the material and reduce the quality level.

c. Untreated compressed air leads to corrosion of air pipelines, resulting in leakage, excessive pressure loss, and increased energy loss. For example: a 3 mm hole under a pressure of 7 bar can cause energy consumption.

3. Treatment of compressed air

The addition of filtration equipment in the compressed air system further improves the quality of the air, reduces the damage of the equipment, and improves the quality of the product.

a. The university filter not only protects the dryer, but also removes the liquid water in the pipeline, and removes the dust to microns and oil.

b. The precision filter can remove the dust to microns and the oil to.

c. The filtration accuracy is configured from low to high, if there is no treatment protection of the pre-filter, the post-high precision filter will be blocked due to the load, resulting in the reduction of the service life of the filter element.

d. The oil-injected screw compressor should be equipped with coarse and fine secondary filtration, and then connected to the adsorption dryer.