JP5655248B2 - Compressed air circuit system - Google Patents

Description

  The present invention relates to a compressed-pneumatic circuit system, and more particularly to a configuration of a compressed-air pneumatic circuit from when compressed air is generated by an air compressor until it is finally discharged through a refrigeration air dryer and an air filter. It is.

  Compressed air generated by an air compressor is used at the end of finishing processing and cleaning of precision equipment such as food processing and lenses. Depending on the use of such compressed air, it is strictly prohibited to take out moisture. Therefore, as shown in FIG. 2, the configuration of the conventional compressed pneumatic circuit employs a configuration through an air dryer in the middle of the pneumatic circuit. In order to remove moisture, oil, sludge and microorganisms that could not be removed in the subsequent stage of the air dryer, a resin or paper mesh or hollow fiber membrane air filter or an air filter wrapped with activated carbon is provided. Has been adopted.

  In addition, in the configuration of the conventional pneumatic circuit, as a part of the function of the air filter, a structure in which a cyclone type air filter to which a float type drain trap is connected is provided at the front stage or the rear stage of the air filter. Was also taken.

  However, according to the configuration of the conventional compressed air circuit, when the compressed air heated by the air compressor is cooled by the pipe line leading to the air dryer, the amount of saturated water vapor under pressure is also reduced. When drain is generated in the road and the drain enters the air dryer together with the compressed air, the air dryer also cools and dehumidifies the drain, thereby deteriorating heat exchange efficiency and energy consumption. There was a problem that it increased excessively.

  Further, in the configuration of the conventional compressed air circuit, air or resin made of resin or paper, which is disposed downstream of the air dryer in order to remove moisture, oil, sludge, and microorganisms that could not be removed, is formed into a mesh or hollow fiber membrane. A filter or an air filter wrapped with activated carbon is likely to be clogged, and it was necessary to replace the element in about six months to one year.

  Further, in the configuration of the conventional compression pneumatic circuit, a general float drain trap as shown in Japanese Patent Application Laid-Open No. 07-139697 connected to an air dryer or a cyclone type air filter disposed in the subsequent stage has the structure. Since the upper pilot air is required, a minute hole having a diameter of 0.5 to 0.9 mm is indispensable, and the hole is often clogged with sludge or the like, causing malfunction. In that case, especially when the float drain trap connected directly to the air dryer drain receiver malfunctions, a large amount of moisture is taken out later, causing the air filter to malfunction. There was a problem of releasing a lot of moisture.

  Furthermore, in the configuration of a conventional compressed air circuit, a resin-made or paper-made air-like or hollow fiber membrane-like air filter disposed for the purpose of removing moisture or oil, or an air filter wrapped with activated carbon is used. At the beginning of use, the pressure loss is several to several tens of times due to sludge or the like adhering to the filter as the usage time increases, and the energy consumption of the air compressor increases accordingly. There was a problem such as.

  The present applicant pays attention to the problems of energy efficiency, maintainability, and functionality in the configuration of the conventional compressed air circuit as described above, and appropriately removes drainage and sludge in the compressed air before and after the air dryer. With the idea that the above problems cannot be solved, the compressed air circuit that realizes energy efficiency improvement in air compressors and air dryers, improvement in air filter maintenance, and improvement in function sustainability of each component The present invention has been developed to lead to the proposal of the “compressed pneumatic circuit system” in the present invention.

JP-A-5-317630 Japanese Utility Model Publication No. 1-167311

  In view of the above problems, the present invention has an object to provide a compressed pneumatic circuit system that realizes energy efficiency improvement in air compressors and air dryers, improvement in air filter maintenance, and improvement in function sustainability of each component. To do.

In order to solve the above-described problems, the first configuration of the compressed air circuit system according to the present invention is from when compressed air is generated by an air compressor until it is finally discharged through a refrigeration air dryer and an air filter. The structure for reducing the energy consumption of the pneumatic circuit of the compressed air is provided with a cyclone type centrifugal separator at a predetermined intermediate position of the pipeline connecting the air compressor and the refrigeration air dryer. The cyclone type centrifugal separator is arranged at a predetermined intermediate point of the pipe line connecting the refrigeration air dryer and the air filter, and the compressed air generated by the air compressor passes through the cyclone type centrifugal separator. Air is supplied to the refrigeration air dryer in a state where moisture and oil are separated and removed, and the compressed air discharged from the refrigeration air dryer Through the centrifuge method moisture-oil it has been blown into the air filter while being separated and removed, reducing the total value or more energy consumption the pressure drop of a centrifugal separator of at least each of the cyclone method and it has a can Ru configuration.

A second configuration of the compressed air circuit system according to the present invention employs a configuration in which a drain trap is provided in the cyclone centrifuge.

According to the first configuration of the compressed air circuit system according to the present invention, the cyclone type centrifugal separator is disposed at a predetermined intermediate position of the pipe line connecting the air compressor and the refrigeration air dryer, so that the compressed air The drain generated by the cooling of the air can be removed primarily by the cyclone centrifuge before it is taken into the refrigeration air dryer, improving the heat exchange efficiency of the refrigeration air dryer and reducing the mechanical burden. It has excellent effects such as reducing energy consumption and energy consumption.

Further, according to the first configuration of the compressed pneumatic circuit system according to the present invention, the cyclone type centrifugal separator is disposed at a predetermined intermediate position of the pipe line connecting the refrigeration air dryer and the air filter. Moisture, oil, sludge and microorganisms in the air are removed primarily and secondarily by the cyclone centrifuge, so that the pressure of the air filter is delayed by delaying clogging of the air filter disposed in the subsequent stage. Loss is reduced to a value greater than the total pressure loss of each cyclone centrifuge, which contributes to reducing the power consumption of the air compressor and reduces the number of element replacements of the air filter, thereby improving maintenance workability. It has an excellent effect of contributing.

Furthermore, according to the first configuration of the compressed air circuit system according to the present invention, the cyclone type centrifugal separators are respectively disposed at the front stage and the rear stage of the refrigeration air dryer, so that the moisture in the compressed air can be reduced. Since it is configured to be removed intensively, even if some components fail to function, it is possible to cover the function with other components, which contributes to improvement of function sustainability. There are excellent effects.

It is explanatory drawing which shows embodiment of the compression pneumatic circuit system concerning this invention. It is explanatory drawing which shows embodiment of the conventional compression pneumatic circuit system.

  In the compressed air circuit system according to the present invention, a cyclone type centrifugal separator 10 is disposed at a predetermined intermediate position of a pipe line 7 connecting the air compressor 1 and the refrigeration air dryer 3, and the refrigeration air dryer 3 and air. The greatest feature is that a cyclone type centrifugal separator 10 is arranged at a predetermined intermediate position of the pipe line 7 connecting the filter 5. Embodiments of a compressed air circuit system according to the present invention will be described below with reference to the drawings.

  The compressed pneumatic circuit system according to the present invention is not particularly limited to the embodiments described below, and is within the scope of the technical idea of the present invention, that is, the shape, size, material, etc. that can exhibit the same operational effects. It can change suitably within the range.

FIG. 1 is an explanatory view showing an embodiment of a compressed pneumatic circuit system according to the present invention.
The compressed pneumatic circuit system according to the present invention has a compressed pneumatic circuit configuration from when compressed air is generated by the air compressor 1 to when it is finally discharged through the refrigeration air dryer 3 and the air filter 5. It is.

  The air compressor 1 is a machine that generates compressed air at a predetermined pressure or higher by compressing air, and there are various types such as a reciprocating type, a rotary type, and a centrifugal type depending on a structure for generating the compressed air. To do. The method of the air compressor 1 used in the present invention is not particularly limited, and any method / structure can be used.

  The refrigeration air dryer 3 is an apparatus for cooling compressed air using the latent heat of vaporization of the refrigerant and condensing and removing the contained water, and there are generally an air cooling type and a water cooling type depending on the cooling method. The refrigerating type air dryer 3 used in the present invention is not particularly limited to the air cooling type and the water cooling type, and is not particularly limited.

  The air filter 5 is a filter for removing moisture, oil, sludge, and microorganisms in compressed air, and is a resin or paper-made air or hollow fiber membrane air filter or an air filter wrapped with activated carbon. Is used. The general air filter 5 generates a pressure loss of several to several tens of times due to sludge or the like adhering to the filter as the usage time increases from about 3 kPa to about 15 kPa at the start of use.

  The pipe line 7 is composed of a hollow tube for supplying compressed air, and is arranged to supply compressed air from the air compressor 1 to the refrigeration air dryer 3 and from the refrigeration air dryer 3 to the air filter 5. The air filter 5 is arranged to feed compressed air, and the air filter 5 is arranged to feed compressed air forward.

  The cyclone-type centrifugal separator 10 is a cyclone-type separation device for removing moisture and oil content in compressed air, and the compressed air that has entered the housing is compressed by the centrifugal force generated by passing through the deflector. It has a structure in which oil moisture and solid matter inside are struck against the inner wall of the housing and dropped, and only air is taken out via a cartridge provided in the central portion. The cyclone-type centrifugal separator 10 is disposed at a predetermined intermediate position of the piping 7 that connects the air compressor 1 and the refrigeration air dryer 3, and the piping 7 that connects the refrigeration air dryer 3 and the air filter 5. Is disposed at a predetermined intermediate position. The cyclone-type centrifugal separator 10 generates a pressure loss of about 0.5 kPa at the start of use, but the value is almost constant even when the number of hours used is increased.

The drain trap 12 is a device for discharging the oil and water stored in the above components to the outside, and there are an electromagnetic type and a float type depending on the discharging method. The drain trap 12 used in the present invention is not particularly limited to the electromagnetic type and the float type, and is not particularly limited. The drain trap 12 is connected to the refrigeration air dryer 3 and the cyclone centrifuge 10.

  For the drain trap 12 used in the present invention, a spring snap action type float type drain trap as shown in Japanese Patent Application No. 2012-263548 or a magnet snap action type float type drain trap as shown in Japanese Patent Application Laid-Open No. 2012-77903 is used. An embodiment is conceivable. By adopting such a mode, when a predetermined amount of drain is stored, the drain can be mechanically and automatically discharged to the outside, and the certainty of drain discharge is ensured.

  The compressed pneumatic circuit structure according to the present invention is composed of the above components. That is, the compressed air generated by the air compressor 1 is first sent to the cyclone centrifuge 10 through the piping 7. At this time, the drain generated in the pipeline 7 and sludge in the compressed air are removed by the cyclone centrifuge 10 and then sent to the refrigeration air dryer 3 through the pipeline 7. In the refrigeration type air dryer 3, moisture contained in the compressed air is condensed and removed by cooling the compressed air, and the cooled compressed air is supplied to the cyclone centrifugal device 10 through the pipe line 7. Is done. The cyclone-type centrifugal separator 10 removes oil moisture and sludge in compressed air that has not yet been removed, and the air is sent to the air filter 5 through the pipe line 7. The air filter 5 removes sludge, microorganisms, and the like in the compressed air almost completely, and finally air is sent to the end via the pipe line 7.

  The drain removed by the refrigeration air dryer 3 or the cyclone centrifugal separator 10 is discharged from each component to the outside by the drain trap 12 connected thereto.

  As described above, the compressed air circuit system according to the present invention removes the drain from the compressed air primarily by the cyclone centrifugal device 10 in the previous stage of the refrigeration air dryer 3. The heat exchange efficiency in 3 will be improved, and it will contribute to reduction of energy consumption. The effect of energy consumption in the refrigeration air dryer 3 due to the provision of the cyclone centrifugal device 10 is expressed by the following mathematical formula.

  In addition, each following numerical formula is air temperature 30 degreeC, humidity 80%, compressed air pressure 0.7MPa, discharge amount 13 cubic meters / min, refrigeration air dryer inlet temperature 45 degreeC (saturated water vapor amount under pressure 8.28g), refrigeration air dryer It is a calculation formula under the conditions of an outlet temperature of 10 ° C. and a cyclone-type centrifugal separator trapping efficiency of 98%, [Equation 1] indicates the amount of water vapor sucked by the air compressor 1, and [Equation 2] is a refrigeration air dryer 3 [Equation 3] indicates the amount of drain flowing into the refrigeration air dryer 3, [Equation 4] indicates the amount of trapped drain of the cyclone centrifuge 10 and [Equation 3]. 5] indicates the amount of energy consumed in the refrigeration air dryer 3, and [Equation 6] indicates the power conversion value of the amount of energy consumed.

That is, since the saturated water vapor amount at an air temperature of 30 ° C. is 30.4 g / cubic meter, the water vapor amount sucked by the air compressor 1 per hour is 18969.6 g as shown in the above [Equation 1]. Since the saturated water vapor amount at the inlet temperature of the refrigeration air dryer 3 at 45 ° C. (8 ° C. converted to atmospheric pressure) is 8.28 g / cubic meter, the water vapor amount in the compressed air flowing into the refrigeration air dryer 3 per hour is 2], which is 6458.4 g / h, which is 12511.2 subtracted from the value of [Equation 1].
g / h is the amount of drain that enters the refrigeration air dryer 3 (see Equation 3). Since 98% of the drain amount can be captured by the cyclone centrifuge 10, the cyclone centrifuge 10 captures a drain amount of about 12261 g / h as shown in [Equation 4]. It will be.

In the conventional compressed air circuit, since the cyclone type centrifugal separator 10 is not disposed in the previous stage of the refrigeration air dryer 3, the 12261 g / h drain is loaded in the refrigeration air dryer 3. That is, when the compressed air is cooled from 45 ° C. to 10 ° C. in the refrigeration air dryer 3, the drain that has entered is also cooled at the same time, and the amount of energy required to cool 1 g of water is 1 cal / g · Since it is ° C., about 429 kcal / h of energy is consumed for cooling the drain (see Equation 5). When this is converted into electric power, 1 kcal = 0.00116 kWh. Therefore, as shown in [Equation 6], 0.5 kW is obtained. In addition, you may multiply [Equation 5] by the thermal efficiency coefficient of performance (COP) of the refrigerating type air dryer 3 as needed.

  As can be seen from the above calculation example, according to the compressed air circuit system according to the present invention, it is possible to reduce the mechanical burden on the refrigeration air dryer 3 and to reduce the energy consumption by about 429 kcal / h. It is possible to reduce power consumption by 0.5 kW per hour in conversion.

  Further, the compressed air circuit system according to the present invention removes drainage from compressed air secondarily by a cyclone centrifugal device 10 at a later stage of the refrigeration air dryer 3, that is, before an air filter 5. The pressure loss of the air filter 5 is reduced, which contributes to the reduction of power consumption of the air compressor 1. The effect of power consumption on the air compressor 1 due to the provision of the cyclone centrifugal device 10 is expressed by the following mathematical formula.

In addition, each following numerical formula is used air compressor 75kW, discharge amount 13 cubic meters / min, compressed air pressure 0.7MPa, motor efficiency 90%, air filter average pressure loss 0.037MPa (however, initial pressure loss: 0.003MPa, Exchange time: 0.07 MPa), air compressor power effect by pressure increase / decrease of 0.1 MPa ± 8.4% (when compressed air pressure is 0.7 MPa), pressure loss of cyclone centrifuge 10 is 0.0005 MPa [Equation 7] indicates the power consumed by the air compressor 1, and [Equation 8] indicates the power loss due to the pressure loss of the air filter 5.

That is, the electric power consumed by the air compressor 1 is 83.3 kW as shown in the above [Equation 7] when the motor efficiency is calculated as 90%. Therefore, when it is desired to obtain the same flow rate even if a pressure loss occurs in the subsequent stage of the air compressor 1, the cyclone type centrifugal separator 10 is not connected to the upstream stage of the air filter 5 from the pressure loss. Electric power consumed by the air compressor 1 is obtained by reducing the pressure loss when the centrifugal separator 10 is connected to the front and rear stages of the refrigeration air dryer 3 and the initial pressure loss of the air filter 5 is assumed to be maintained. When multiplied by the power effect of the air compressor, as shown in [Equation 8], it can be seen that a power loss of 2.3 kW is generated in the power consumption of 83.3 kW.

In the conventional compressed air circuit, since the cyclone type centrifugal separator 10 is not disposed in the previous stage of the air filter 5, the 2.3 kW power is wasted in the air compressor 1. . According to the compressed air circuit system according to the present invention, it is possible to realize a 2.3 kW reduction in power consumption in the air compressor 1, and in the power consumption of the refrigeration air dryer 3 in [Equation 6]. It is possible to obtain a power consumption reduction effect of 2.8 kW in total with 0.5 kW .

  In the present invention, the cyclone-type centrifugal separator 10 is disposed in the front stage of the refrigeration air dryer 3 and in the front stage of the air filter 5, thereby improving the energy consumption efficiency of the refrigeration air dryer 3 and the pressure loss of the air filter 5. As a result, the power consumption of the air compressor 1 and the refrigeration air dryer 3 can be reduced. In addition to end processing and cleaning of precision equipment such as food processing and lenses, compressed air is used. The present invention can be employed in all fields, and the industrial applicability of the “compressed pneumatic circuit system” in the present invention is considered to be great.

DESCRIPTION OF SYMBOLS 1 Air compressor 3 Refrigeration type air dryer 5 Air filter 7 Piping line 10 Cyclone type centrifugal separator 12 Drain trap

Claims (2)

A configuration for reducing the amount of energy consumed by the pneumatic circuit of the compressed air from when the compressed air is generated by the air compressor until it is finally discharged through the refrigeration air dryer and the air filter,
A cyclone separator is disposed at a predetermined intermediate point in the piping line connecting the air compressor and the refrigeration air dryer, and a cyclone type centrifugal separator is disposed at a predetermined intermediate point in the piping line connecting the refrigeration air dryer and the air filter. Established,
The compressed air generated by the air compressor is sent to the refrigeration air dryer with the moisture and oil components separated and removed via a cyclone type centrifugal separator, and the compressed air discharged from the refrigeration air dryer is also supplied. Air is sent to the air filter with water and oil separated and removed via a cyclone centrifuge, and at least the energy consumed is equal to or greater than the total pressure loss of each cyclone centrifuge. A compressed pneumatic circuit system characterized in that the amount can be reduced .   The compressed-pneumatic circuit system according to claim 1, wherein the cyclone type centrifugal separator is provided with a drain trap.