JP2011007171A - Method and device for treating drain water generated from compressed air - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the following problem: a drain water backflow is never considered although only a sufficient flow in a compressed air delivery pipe is taken into consideration.SOLUTION: In this method for treating drain water generated from compressed air by an air tank 14 and a refrigerating type air dryer 30, the drain water D1 from the air tank 14 is merged into the drain water D2 from the refrigerating type air dryer 30 always having potential energy as it is positioned in a higher place than the air tank 14. In this case, the drain water D2 has the potential energy, thereby the drain water D1, D2 are prevented from flowing backward from a confluent part to the side of the refrigerating type air dryer 30. Then, by receiving an electric signal, the drain water D1, D2 are started to be fed by force of compressed air. Finally, oil is adsorbed and emulsion is demulsified.

Description

  The present invention relates to a method and apparatus for treating drain water generated from compressed air. More specifically, the present invention relates to a method for treating drain water generated from compressed air by an air tank and a refrigeration air dryer. The drain water from the air tank is combined with the drain water from the refrigeration air dryer that always has potential energy because it is located higher than the air tank. In this case, the drain water has potential energy. This prevents the reverse flow of drain water from the merging section to the refrigeration air dryer side, then starts to send out the drain water by the force of compressed air by receiving an electrical signal, and finally oil adsorption and emulsion Describes the technology to handle destruction, and place the refrigeration air dryer higher than the air tank Without supplying a check valve in the middle of the drain water pipe connected to the refrigeration air dryer, the compressed air and drain water are sent to the drain water treatment device with a single set of electromagnetic drain traps and discharged as clean water. In addition, the present invention relates to a technology that further reduces costs and has a small installation area and is easy to install.

  Conventionally, as a technique related to a treatment method and a treatment apparatus for drain water generated from compressed air, in a drain treatment method for compressed air generated from a plurality of devices, all the drain pipes for discharging drain are assembled, Positions after the drainage that is discharged by an electric drain trap (for example, refer to Patent Document 1) and the drain water generated from compressed air by a plurality of devices are joined together so as not to flow back to the respective devices. In some cases, the drain water is discharged for a predetermined time and sent to the drain water treatment apparatus (for example, see Patent Document 2).

  First, Patent Document 1 describes a conventional compressed air drain treatment method and drain treatment apparatus similar to a treatment method and treatment apparatus for drain water generated from compressed air.

In this case, in Patent Document 1, the drain D1 generated by storing the compressed air from the compressor 11 in the air tank 14 and sending the compressed air to the refrigeration air dryer 30 through the compressed air discharge pipe 15 for cooling. In the compressed air drain processing apparatus for discharging D2, the drain pipe 16 or the drain pipe 18 connected to the drain outlet 14b of the air tank 14 and the drain outlet 31c of the refrigeration air dryer main body 31 are connected. The drain pipe b, the collecting pipe 41 connected to the drain pipes 16, 18, and 36, and the electric drain trap 40 connected to the collecting pipe 41 are arranged. In particular, the compressed air flows through the compressed air discharge pipe 15. The cross-sectional area of the compressed air discharge pipe 15 inner diameter is larger than the cross-sectional area of the drain pipes 16, 18, 36 so that the Comb has been shown further techniques were provided with drain valves 17 and 37 serving as a failure in the middle of the drain pipe 16,18,36.
JP-A-11-201390

  Next, Patent Document 2 describes an oil-water separation method and an oil-water separator for drain water generated from compressed air, which are similar to methods and apparatuses for treating drain water generated from compressed air.

In this case, in Patent Document 2, the drain discharge pipes 21a, 21b, 21c, 31a, 31b, so that the drain water generated from the compressed air can be discharged to the plurality of devices 20, 30, 40, 50, 60, respectively. 31c, 41a, 41b, 41c, 51a, 51b, 51c, 61a, 61b, 61c are connected, and drain discharge pipes 21a, 21b, 21c, 31a, 31b, 31c, 41a, 41b, 41c, 51a, 51b, 51c, The check valves 23, 33, 43, 53, 63 are arranged in the middle of 61a, 61b, 61c, respectively, and the drain discharge pipes 21a, 21b, 21c, 31a, 31b, 31c, 41a, 41b, 41c, 51a. , 51b, 51c, 61a, 61b, 61c are all connected to drain collecting pipes 151, 152, 153, and drain discharge pipes 21c, 31c, 41c are connected. An electric drain trap 157 that discharges drain water accumulated in the drain collecting pipes 151 and 152 and sends it to the drain water treatment device 70 is disposed at a position after all of 51c and 61c have joined the drain collecting pipes 151 and 152. Technology is shown.
JP 2003-194285 A

  However, it is similar to a method and apparatus for treating drain water generated from such compressed air, and a method and apparatus for draining conventional compressed air, a method for separating oil water from drain water generated from compressed air, and The oil / water separator has the following problems.

  First, in a method for draining compressed air generated from a plurality of devices, all of the drain pipes that discharge the drain are collected and discharged by a single electric drain trap. To facilitate circulation, the cross-sectional area of the compressed air discharge pipe inner diameter is made larger than the cross-sectional area of the drain pipe inner diameter, and a drain valve that becomes an obstacle in the middle of the drain pipe is arranged, thereby reducing the flow of the compressed air discharge pipe. I was only thinking about how to improve it, and I had no idea about the backflow of drain water.

  On the other hand, the drain water generated from compressed air in multiple devices is merged so that it does not flow back to the side of each device, and the drain water is discharged for a predetermined time at the position after the whole merges to drain water treatment In the technique of feeding into the apparatus, it can be said that a check valve is provided in the middle of all the drain discharge pipes, so that a useless check valve is provided.

  In the method of treating drain water generated from compressed air by the air tank 14 and the refrigeration air dryer 30, the present invention is configured such that the drain water D1 from the air tank 14 is positioned higher than the air tank 14. In this case, the drain water D2 from the refrigeration air dryer 30 having potential energy is merged. In this case, the drain water D2 has potential energy, so that the side of the refrigeration air dryer 30 from the merging portion. The drain water D1 and D2 are prevented from flowing back to each other, and then the drain water D1 and D2 are started to be sent out by the force of compressed air by receiving an electric signal, and finally the oil adsorption and emulsion breaking treatment In addition, the electrical signal has a liquid level that exceeds a certain limit at certain time intervals or at specific locations. And characterized in that given off, further, the flow of the drain water D2, by characterized in that have a function to prevent backflow is of the above-mentioned problems are eliminated.

  Further, in a treatment apparatus for drain water generated from compressed air by the air tank 14 and the refrigeration air dryer 30, a drain water pipe 16 connected to the lower portion of the air tank 14 for the purpose of discharging drain water D1; For the purpose of discharging the drain water D2, the drain water pipe 36 connected to the lower part of the refrigeration air dryer 30 located higher than the air tank 14 is joined to the drain water collecting pipe 41. Since the drain water D2 has potential energy, the drain water D1 and D2 are prevented from flowing back from the junction to the refrigeration air dryer 30, and the drain water D1 and D2 are sent out together with the compressed air. A trap 40 and a drain water treatment device 70 that performs oil adsorption and emulsion breakage are provided. Further, the compressor 1 In addition, the air tank 14, the refrigeration air dryer 30, the electromagnetic drain trap 40, and the drain water treatment device 70 are integrally configured as a package type refrigeration air dryer mounted air compressor 1. Furthermore, together with the compressor 11, the air tank 14, the refrigeration air dryer 30 and the electromagnetic drain trap 40 are integrally configured as a package type refrigeration air dryer mounted air compressor 1A. Furthermore, the difference in height on the installation surface of the air tank 14 and the refrigeration air dryer 30 is 0.7 to 3.5 m, and further, A check valve for preventing backflow is provided in the middle of the drain water pipe 36, so that It was to solve the.

  As is clear from the above description, the present invention can provide the following effects.

  First, drain water pipe connected to the lower part of the air tank and drain water are discharged for the purpose of discharging drain water in the treatment equipment of drain water generated from compressed air by air tank and refrigeration air dryer. For this purpose, the drain water pipe connected to the lower part of the refrigeration air dryer located higher than the air tank is joined to the drain water collecting pipe, and in this case, the drain water D2 has potential energy to join the junction. The drainage water D1 and D2 are prevented from flowing back to the refrigeration air dryer 30 side, and an electromagnetic drain trap that sends out the drain water together with the compressed air and a drain water treatment device that performs oil adsorption and emulsion breakage are provided. Therefore, it was considered that drain water and compressed air would not flow backward from the drain water collecting pipe to the refrigeration air dryer side in the middle of the drain water pipe. Without providing the stop valve, it becomes possible to prevent backflow.

  Second, the air tank, the refrigeration air dryer, the electromagnetic drain trap, and the drain water treatment device, together with the compressor, are integrated as a packaged refrigeration air dryer mounted air compressor, so that the refrigeration air dryer Is located higher than the air tank, so the installation area is small, and it is easy to move because of being integrated, and it is also possible to easily perform the installation of the apparatus.

  Third, together with the compressor, the air tank, refrigeration air dryer, and electromagnetic drain trap are integrated as a packaged refrigeration air dryer mounted air compressor, making the refrigeration air dryer higher than the air tank. The installation area is small because it is located at a location, and it is easy to move because it is integrated, and it is also possible to easily perform the installation of the apparatus.

  Fourth, the difference in height on the installation surface of the air tank and the refrigeration air dryer is 0.7 to 3.5 m, without worrying about the pressure loss of the compressed air discharge pipe, It became possible to secure potential energy reliably.

  Fifth, by providing a check valve to prevent backflow in the middle of the drain water pipe, even if the pressure momentarily decreases due to fluctuations in the pressure in the air tank for any reason, Moreover, even when the potential energy of the drain water generated from the compressed air by the air tank and the refrigeration air dryer is insufficient, it becomes possible to prevent the back flow.

  Diagram showing the entire invention of the present application   The figure which showed another whole of this invention

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
Here, FIG. 1 is a diagram showing the whole of the present invention, and FIG. 2 is a diagram showing another whole of the present invention.

(First embodiment)
As shown in FIG. 1, reference numeral 1 denotes a package type refrigeration air dryer-mounted air compressor, which includes an air compressor 10, a refrigeration air dryer 30, an electromagnetic drain trap 40, a drain water treatment device 70, compressed air and drain. A water pipe is integrally stored in the box 1 a, and the compressed air produced by the air compressor 10 is sent to the refrigeration air dryer 30 through the compressed air discharge pipe 15. However, there is no need to be concerned with the box 1a, as long as all of the above-mentioned items stored in the box 1a are located on a flat substrate.

  In this case, in FIG. 1, the refrigeration air dryer 30 is arranged on the shelf 1b. However, even if the shelf 1b is not provided, there is no need to stick to this place, and the compressed air discharge pipes 15, 35 and drains are not required. It may be used in place of the shelf 1b as a support for supporting the water pipes 16 and 36 and the drain water collecting pipe 41, or may be supported by other methods. In any case, it is necessary that the refrigeration air dryer 30 is always located higher than the air tank 14 in order to secure potential energy. Furthermore, it can be said that the height difference between the installation surfaces of the air tank 14 and the refrigeration air dryer 30 needs to be 0.7 to 3.5 m in order to secure potential energy.

  Here, the air compressor 10 includes a compressor 11, a motor 12, and an air tank 14. Then, when the motor 12 is operated, the compressor 11 is rotated via the belt, thereby sucking the air 92 from the suction port 13, creating compressed air by the compressor 11, and supplying the compressed air into the air tank 14. It is configured to store. Further, a compressed air discharge pipe 15 for sending the compressed air in the air tank 14 to the refrigeration air dryer 30 is connected to a compressed air discharge port 14 a formed in the air tank 14. Further, in such a configuration, drain water D <b> 1 generated by condensation from the compressed air is accumulated at the bottom of the air tank 14.

  In addition, regarding the compressed air discharge piping 15, it is necessary to ensure a sufficient inner diameter in order to prevent pressure loss. However, the pressure of the compressed air in the air tank 14 is surely higher than the pressure of the compressed air in the refrigeration air dryer 30 due to the pressure loss due to the compressed air passing through the compressed air discharge pipe 15. You can say that.

  On the other hand, the refrigeration air dryer 30 contains a refrigerant circulation device 32 including an accumulator, a compressor, and a condenser in a refrigeration air dryer main body 31, and a refrigerant pipe 33 in which fins 33a are positioned in the periphery. A refrigerant such as ammonia, freon, etc. circulates between the refrigerant circulation device 32 and the refrigerant pipe 33 to cool the compressed air. In this case, the compressed air discharge pipe 15 from the air tank 14 is connected to a compressed air inlet 31 a formed in the refrigeration air dryer main body 31 so that compressed air flows in.

  The compressed air dried by cooling is manually released from the compressed air discharge pipe 35 connected to the compressed air outlet 31b formed in the refrigeration air dryer body 31. The compressed air on-off valve 38 that can be shut off can be supplied as dry compressed air 91 to various actuators such as an air cylinder, an air motor, and so on.

  Further, in such a configuration, drain water D2 generated by condensation from the compressed air in the refrigeration air dryer 30 is accumulated at the bottom of the refrigeration air dryer main body 31.

  The drain water D1 accumulated at the bottom of the air tank 14 is located in the middle of the drain water pipe 16 and the drain water pipe 16 from the drain water discharge port 14b formed at the bottom of the air tank 14. Thus, the drain water collecting pipe 41 is reached via the drain water on-off valve 17 that can manually open and shut off the drain water flow.

  Further, the drain water D2 accumulated at the bottom of the refrigeration air dryer main body 31 is supplied from a drain water discharge port 31c formed at the bottom of the refrigeration air dryer main body 31 to the drain water pipe 36 and the drain water pipe 36. The drain water collecting pipe 41 is joined via a drain water on-off valve 37 which is located in the middle and can manually open and shut off the drain water flow. The drain water on / off valve 37 including the drain water on / off valve 17 may be omitted.

  In this case, the refrigeration air dryer 30 is always positioned higher than the air tank 14, and the height difference between the air tank 14 and the refrigeration air dryer 30 is 0.7 to 3.5 m. By passing the pressure of the compressed air in the air tank 14 that is about to drain the drain water D1 in the air tank 14 and the compressed air discharge pipe 15 that is about to drain the drain water D2 in the refrigeration air dryer 30 Comparing the case where the potential energy of the drain water D2 is added to the pressure of the compressed air in the refrigerated air dryer 30 which has been depressurized, the pressure of the drain water D2 is near the condensate drain water collecting pipe 41. Can always be kept at a high value, preventing the fluid from flowing back from the drain water collecting pipe 41 side to the refrigeration air dryer 30 side. It's that.

  However, it is also possible to place a check valve in the middle of the drain water pipe 36 in consideration of exceptional abnormal situations. That is, as an exceptional abnormal situation, when the pressure in the air tank 14 fluctuates for some reason, the pressure instantaneously decreases, or is generated from compressed air by the air tank and the refrigeration air dryer. It can be considered that it is possible to cope with such a case that the potential energy of the drain water is insufficient. Note that examples of fluctuations in the pressure in the air tank 14 may be due to the power source connected to the motor 12, the secular change of the compressor 11 or the motor 12, the abnormality of the suction port 13, or the like. It is done.

  An electromagnetic drain trap 40 is located in the middle of the drain water collecting pipe 41, and drain water accompanied with compressed air is sent to the drain water treatment device 70. By the way, the electromagnetic drain trap 40 sends out the drain waters D1 and D2 together with the compressed air depending on the amount of the drain water D1 stored in the air tank 14 or at regular intervals. However, the electromagnetic drain trap 40 may be anything as long as it discharges compressed air and drain water simultaneously.

  Now, regarding the drain water treatment device 70 that performs oil adsorption and emulsion breakage, as seen in the drain water treatment device 70 of FIG. Adsorbent with emulsion-breaking particles in which activated carbon that removes odors and odors is arranged to block the flow of drain water over the entire cross-section at the center, and to which emulsion-breaking particles that adhere to the oil are adsorbed by breaking the emulsion. And a mixture of adsorbents for adsorbing oil in a generally uniform manner are stored before and after the activated carbon. However, as the oil adsorbing material 72, it is conceivable whether the adsorbing material with emulsion breaking particles and the adsorbing material are housed or only the adsorbing material with emulsion breaking particles is housed.

  Here, regarding the drain water treatment apparatus main body 71, use a transparent material such as glass or plastic so that the internal situation can be visually observed from the outside, or visually observe the internal situation from the outside. It is also conceivable to insert a transparent material such as glass or plastic so that it is possible.

  In addition, the adsorbent with emulsion breaking particles releases the oil-water bond by emulsion breaking the drained water that is emulsified by the action of the emulsion breaking particles and the minute oil is combined with water, and then the separated oil is It is adsorbed by the adsorbent and adsorbent constituting the adsorbent with emulsion breaking particles. Therefore, since the adsorbent with emulsion breaking particles and the adsorbent are scattered, the oil can be removed by completely separating and adsorbing the oil from the emulsified oil.

  On the other hand, as the filling position in the drain water treatment apparatus main body 71 of the activated carbon, the activated carbon gets dirty quickly in the uppermost stream, and the activated water itself seems to flow out by flowing out the activated carbon itself in the downstream, It is desirable to be positioned approximately at the center.

  Here, as the structure of the drain water treatment device main body 71, drain water that is a liquid flows into the drain water treatment device main body 71 from an inflow port that is an end of the drain water collecting pipe 41, and ends the clean water pipe 75. Two outlet spaces are provided on both the inlet side and the outlet side of the drain water treatment device main body 71 so that the drain water treatment device main body 71 flows uniformly in the drain water treatment device main body 71 before it flows out from the outlet which is the portion. The inlet 71 which is the edge part of the drain water collecting pipe 41 and the outlet which is the edge part of the clean water piping 75 are located by securing the portion 71z.

  Accordingly, two oil adsorbent retainer plates 74 having a large number of small holes are prepared in order to secure the space 71z at both ends and to allow the drain water, which is a liquid, to flow easily. A cylindrical column 73 having a diameter smaller than the inner diameter of the drain water treatment device main body 71 is disposed between the plate 74 and both ends of the drain water treatment device main body 71 to support the oil adsorbent retainer plate 74, and with emulsion breaking particles. The oil adsorbent 72, which is an adsorbent, an adsorbent, or activated carbon, is accommodated on the center side between the two oil adsorbent retainer plates 74. However, the support column 73 is not necessarily limited to a cylindrical shape, and may have any shape as long as the space portion 71z can be secured. As the oil adsorbing material pressing plate 74, it is conceivable to use a punching plate, a ceramic resin or the like in which many small holes are formed.

  In addition, the adsorbent with emulsion breaking particles and the oil adsorbent 72, which is an adsorbent, increase in resistance as it adsorbs foreign substances such as oil, and are further pressed down by being pressed toward the downstream while being compressed. Emulsified oil breakage and oil adsorption function will also decline.

  Therefore, in order to prevent this even a little, although not specifically illustrated, an oil adsorbent retainer plate is provided at a substantially central portion of the drain water treatment apparatus main body 71 so as to vertically block the liquid flow. An intermediate perforated plate having a number of small holes similar to 74 is disposed, and in order to support the intermediate perforated plate, drain water is provided between the intermediate perforated plate and the oil adsorbent pressing plate 74 located on the lower side. By disposing a cylindrical support material having a diameter smaller than the inner diameter of the processing apparatus main body 71, the adsorbent with emulsion breaking particles and the oil adsorbent 72 which is an adsorbent are prevented from being compressed.

  However, the position of the intermediate perforated plate may be slightly around the center of the drain water treatment apparatus main body 71. Further, the support material for supporting the intermediate porous plate need not be limited to a cylindrical one, and any shape may be used as long as the intermediate porous plate can be supported by fixing it with several bolts.

  The drain water treatment apparatus main body 71 is best filled with activated carbon immediately after the downstream of the intermediate perforated plate, but it is also sufficient to fill the drain water treatment apparatus main body 71 immediately before the upstream of the intermediate perforated plate. It is done. On the other hand, even if the intermediate porous plate is filled up and down somewhat, a considerable effect can be seen, and any portion located upstream of the drain water treatment device main body 71 close to the terminal of the drain water treatment device main body 71 is filled. Even so, some effects are seen.

  Here, as a method of making an adsorbent with emulsion breaking particles in which emulsion breaking particles are attached to an adsorbent, after a solution in which emulsion breaking particles such as amine and barium sulfate are dissolved in a solvent is attached to the adsorbent, A method of evaporating and drying the solvent is common, but there is also a method of spraying the solution onto the adsorbent in a mist form. Further, a method is also conceivable in which the emulsion breaking particles such as amine and barium sulfate are attached to the adsorbent in a state of being uniformly mixed in the liquid rather than being dissolved. Furthermore, it can be considered that the emulsion breaking particles themselves are mixed with an adsorbent.

  In this case, the emulsion-breaking particles and the adsorbent may be filled so as to be dispersed between the adsorbents without changing the state of the emulsion-breaking particles and the adsorbent to the adsorbent with emulsion-breaking particles. Also in this case, the activated carbon may be disposed immediately before or immediately upstream of the intermediate porous plate or in the vicinity thereof, or may be disposed immediately before or immediately before the porous plate at the inlet or outlet. However, in any of the above cases, a configuration in which activated carbon is not disposed is also conceivable.

  On the other hand, the amine used in the present invention may be an amine compound or a derivative thereof, and is preferably a solid when the amine compound or a derivative thereof is 25 ° C. However, it may be a compound that becomes a solid in a mixture with other compounds. That is, the compounds may be used alone or in combination of two or more.

  By the way, these amine compounds and derivatives thereof are preferably primary amines, secondary amines, tertiary amines, and derivatives thereof, more preferably primary amines, secondary amines, and derivatives thereof, particularly preferably, Primary amines (eg stearylamine) and their derivatives.

  Examples of the amine compound include primary amines such as hexylamine, heptylamine, octylamine, nonylamine, decylamine, laurylamine, myristylamine, palmitylamine, oleylamine, stearylamine, or hydrocarbon chains thereof. Secondary amines such as diamines and triamines, and tertiary amines, or their picrates, various salts (for example, salts of hydrochloric acid, sulfuric acid, phosphoric acid, carbonic acid, acetic acid, etc.), and these hydrocarbon chains Examples include primary amines, secondary amine acid amides, amidines, ureas, thioureas, and primary amine Schiff bases.

  Moreover, what consists of fiber containing nonwoven fabrics, such as a polypropylene and a polystyrene, can be considered as an adsorbent used for the adsorbent and the adsorbent with emulsion breaking particles. However, the adsorbent used for the adsorbent and the adsorbent with emulsion breaking particles need not be limited to the above-mentioned one, and activated carbon and sawdust can be used if they have an oil adsorption function and are water-insoluble. It is possible to use other things.

  Here, the size of the adsorbent used in the adsorbent and the adsorbent with emulsion breaking particles is preferably (10 to 200 mm) × (2 to 50 mm) or more preferably ( 30 to 80 mm) × (5 to 40 mm). In particular, it is most preferable to prepare two types of sizes of (35 to 55 mm) × (25 to 40 mm) and (40 to 60 mm) × (3 to 10 mm). From another viewpoint, this can be said to be close to the idea of preparing two types of small pieces of 100 mm x 50 mm or less and 3 to 10 times different in area. It can be said that it is ideal to prepare two kinds of small pieces of 60 mm × 40 mm or less and different sizes 4 to 8 times in area.

  In this case, the reason why such a size is preferable is that when the adsorbent used for the adsorbent and the adsorbent with emulsion breaking particles is filled in the drain water treatment apparatus main body 71, the gap is not large. Since it is difficult to fill a large amount by increasing the size, it becomes difficult to obtain a large surface area, and there are many parts that are forcibly compressed, but such parts have the function of breaking and adsorbing the emulsified oil The performance cannot be ensured because the amount to be filled is reduced, and if it is too small, the gap is basically small, so the destruction of the emulsified oil and the deterioration of the adsorption function are accelerated, It is troublesome to cut, and it is also troublesome to perform various management.

  In addition, the use of two types of sizes means that by preparing two types of small pieces of different sizes, adding small ones to the large gaps and unreasonable compression that are issues with increasing the size It has a great meaning that it can be compensated by adding a big thing to the early functional decline that is a problem by making it small at the same time.

  As for the two types of small pieces, it is best to use two types of small pieces for both the adsorbent and the adsorbent used for the adsorbent with emulsion breaking particles. Large pieces may be used for the adsorbent used for the adsorbent with particles, or vice versa. As a matter of course, the emulsion breaker particles and two kinds of adsorbents are packed so as to be dispersed in a disperse manner between the adsorbents in the state of particles without being in the state of an adsorbent with emulsion breaker particles. It is also possible.

  The method and apparatus for treating drain water generated from compressed air according to the present invention are configured as described above, and the contents of the operation will be described below.

  First, when the motor 12 constituting the air compressor 10 is operated, the compressor 11 is also rotated by the transmission of the belt, the air 92 sucked from the suction port 13 is compressed, and the compressed air is stored in the air tank 14. . In the process of storing the compressed air in the air tank 14, drain water generated by the condensation of the compressed air accumulates as drain water D <b> 1 at the bottom of the air tank 14. At the same time, since the packaged refrigeration air dryer-mounted air compressor 1 is operated by a single power source, the refrigeration air dryer 30 starts operating simultaneously with the air compressor 10.

  Next, when dry compressed air 91 is supplied by operating various actuators such as an air cylinder connected to a compressed air opening / closing valve 38 at the tip of the compressed air discharge pipe 35, the air tank 14. Compressed air stored in the air is sent to the refrigeration air dryer 30 through the compressed air discharge pipe 15. In the process of cooling the compressed air in the refrigeration air dryer 30 as well, drain water generated by condensation of the compressed air is accumulated as drain water D2 on the bottom of the refrigeration air dryer main body 31.

  Here, the cooled compressed air similarly becomes dry compressed air, passes through the compressed air discharge pipe 35 and the compressed air on / off valve 38 from the compressed air outlet 31b, and is dried as compressed air 91 by an air cylinder or air. It is sent to various actuators such as motors.

  On the other hand, the drain water D1 accumulated at the bottom of the air tank 14 passes through the drain water pipe 16, the drain water on-off valve 17 located in the middle of the drain water pipe 16, and the drain water collecting pipe 41. It is sent to an electromagnetic drain trap 40 located in the middle of the water collecting pipe 40. In this case, in the electromagnetic drain trap 40, the drain water D <b> 1 is sent out together with the compressed air by opening the drain water D <b> 1 stored in the air tank 14 at regular intervals.

  The drain water D2 accumulated at the bottom of the refrigeration air dryer main body 31 passes through a drain water pipe 36 and a drain water on-off valve 37 located in the middle of the drain water pipe 36, and a drain water collecting pipe 41. To join.

  The condition is that the refrigeration air dryer 30 is positioned higher than the air tank 14, and the difference in height between the air tank 14 and the refrigeration air dryer 30 is 0.7 to 3.5 m. Thus, the drain water is applied to the internal pressure of the air tank 14 from which the drain water D1 in the air tank 14 is to be discharged and the internal pressure of the refrigeration air dryer 30 from which the drain water D2 in the refrigeration air dryer 30 is to be discharged. Compared to the case where the potential energy possessed by D2 is added, the pressure of the drain water D2 can always be maintained at a higher value near the condensing drain water collecting pipe 41. It is.

  In the drain water treatment device 70, first, drain water and compressed air fed from the drain water collecting pipe 41 pass through the space 71 z and the oil adsorbent presser plate 74 from the lower part of the drain water treatment device 70. The adsorbent with emulsion-breaking particles and the adsorbent with emulsion-breaking particles adhering to each other and the adsorbent that adsorbs oil and the adsorbent adsorbing oil are stored in a roughly uniform state. In the case of the adsorbent with emulsion breaking particles, the emulsion breaks by releasing the water-oil bond of the emulsified oil, and the separated oil is adsorbed. From the clean water piping 75 after adsorbing the oil that could not be adsorbed and improving the cleanliness of the drain water by repeatedly performing such treatment many times. It has produced as water purification 93. In the drain water treatment apparatus 70, it is also conceivable that drain water and compressed air flow from the upper part of the drain water treatment apparatus 70 and flow out from the lower part of the drain water treatment apparatus 70.

  And when drain water passes activated carbon, an odor and a pigment | dye are removed. That is, these operations are achieved by the adsorbent with emulsion breaking particles, the adsorbent, and the oil adsorbent 72 made of activated carbon. In this case, only the adsorbent with emulsion breaking particles can be considered as the oil adsorbent 72.

  In addition, as an example, specifically showing how much is filled, the drain water generated from the screw type air compressor 10 of 55 Kw to 110 Kw is approximately 200 mm in height and 950 mm in height. The drain water treatment device main body 71, which is a cylinder, is filled with 2.5 kg of an adsorbent with 45 mm × 25 mm of a polypropylene nonwoven fabric and 2.5 kg of an adsorbent of 45 mm × 5 mm which is a polypropylene nonwoven fabric. Two sets of drain water treatment devices 70 filled with 1 kg of activated carbon are used in parallel.

(Second embodiment)
As shown in FIG. 2, 1A is a package type refrigeration air dryer mounting type air compressor, and the air compressor 10, the refrigeration air dryer 30, the electromagnetic drain trap 40, the piping of compressed air and drain water, The compressed air produced by the air compressor 10 is fed into the refrigeration air dryer 30 through the compressed air discharge pipe 15. However, there is no need to be concerned with the box 1a, as long as all of the above-mentioned items stored in the box 1a are located on a flat substrate.

  In this case, in FIG. 2, the refrigeration air dryer 30 is arranged on the shelf 1d. However, even if the shelf 1d is not provided, it is not necessary to stick to this place, and the compressed air discharge pipes 15, 39 and drains are not required. It may be used in place of the shelf 1d as a support column for supporting the water pipes 16, 36 and the drain water collecting pipe 42, or may be supported by other methods. In any case, it is necessary that the refrigeration air dryer 30 is always located higher than the air tank 14 in order to secure potential energy. Furthermore, in order to secure potential energy, the difference in height between the installation surface of the air tank 14 and the refrigeration air dryer 30 needs to be 0.7 to 3.5 m. It can be said that this is the same as the embodiment.

  The major difference between the second embodiment and the first embodiment is that the package type refrigeration air dryer mounted air compressor 1 of the first embodiment is configured integrally with the drain water treatment device 70. On the other hand, the package type refrigeration air dryer mounting type air compressor 1A of the second embodiment does not include the drain water treatment device 70. In this case, in the second embodiment, the package type refrigeration air dryer mounting type air compressor 1A is fixed to an angle 76 which is a drain water treatment device 70 fixing means 76 and bolts (not shown in FIG. 2). Yes.

  The fixing means 76 need not be limited to the angle 76 and the bolt, and it is conceivable that the drain water treatment device 70 is wound around and fixed to the package type refrigeration air dryer-mounted air compressor 1A. . Further, the fixing means 76 is not absolutely necessary.

  The method and apparatus for treating drain water generated from compressed air according to the present invention are configured as described above, and the contents of the operation will be described below.

  In this case, since the configuration of the device related to the operation of the second embodiment is the same as the configuration of the device related to the operation of the first embodiment, the operation is also the same. The explanation is omitted.

A technique relating to a treatment method and a treatment apparatus for drain water generated from compressed air, which will be described in more detail.
In the treatment equipment for drain water generated from compressed air by an air tank and a refrigeration air dryer, for the purpose of discharging drain water, the drain water pipe connected to the lower part of the air tank, and the purpose of discharging drain water, The drain water pipe connected to the lower part of the refrigeration air dryer located higher than the air tank is joined to the drain water collecting pipe. In this case, the drain water has potential energy so that the refrigeration air dryer can be connected to the refrigeration air dryer. This technology describes a technology that is equipped with an electromagnetic drain trap that discharges drain water together with compressed air, and a drain water treatment device that performs oil adsorption and emulsion breakage. Disposing the air dryer at a higher position than the air tank, and processing with a single electromagnetic drain trap Intended, are those of the contents in consideration of the cost. That is, the package type refrigeration air dryer mounted air compressor is configured in a form that eliminates waste.

1 ··································································· Packaged refrigeration air dryer mounted air compressor 1a Shelf 1c ... Box 1d ... Shelf 10 ... Air compressor 11 ... Compressor 12 ... Motor 13 ...・ Suction port 14... Air tank 14 a ...... Compressed air discharge port 14 b ...... Drain water discharge port 15 ...... Compressed air discharge piping 16 ...... Drain water pipe 17 ··· Drain water on-off valve 30 ················· Freezer air dryer 31 ········· Freezer air dryer body 31a ··· Compressed air inlet 31b ··· ... Compressed air outlet 31c ... Drain water outlet 32 ... Refrigerant circulation device 33 ... Refrigerant pipe 33a ... Fin 35 ... Compressed air discharge pipe 36 ... Drain water pipe 37 ... Drain water open / close Valve 38... Compressed air open / close valve 39... Compressed air discharge pipe 40. Drain water collecting pipe 70 Drain water treatment device 71 Drain water treatment device main body 71z Space portion 72 Oil adsorbent 73 ········································· Oil adsorbent retainer plate 75 ······ clean water piping 76 ··· angle (fixing means)
91 ······································· Dry air 92 ······ Air 93 ··· Clean water D1 ··· Drain water D2 ··· Drain water

Claims (8)

  In the method for treating drain water generated from compressed air in an air tank (14) and a refrigeration air dryer (30), drain water (D1) from the air tank (14) is fed from the air tank (14). Combined with the drain water (D2) from the refrigeration air dryer (30) that always has potential energy by being located at a high place, in this case the drain water (D2) has potential energy The drain water (D1, D2) is prevented from flowing back from the junction to the refrigeration air dryer (30) side, and then the drain water (D1, D2, A method for treating drain water generated from compressed air, characterized in that the delivery of D2) is started, and finally oil adsorption and emulsion breakage treatment are performed.   The electric signal is generated from compressed air according to claim 1, wherein the electric signal is generated every certain time or every time the liquid level exceeds a certain limit in a specific place. Drain water treatment method.   The method for treating drain water generated from compressed air according to claim 1 or 2, wherein the flow of the drain water (D2) has a function of preventing backflow.   In a treatment apparatus for drain water generated from compressed air by an air tank (14) and a refrigeration air dryer (30), it is connected to the lower part of the air tank (14) for the purpose of discharging drain water (D1). Drain water pipe (16) and a drain water pipe connected to the lower part of the refrigeration air dryer (30) positioned higher than the air tank (14) for the purpose of discharging drain water (D2) ( 36) is joined to the drain water collecting pipe (41). In this case, the drain water (D2) has potential energy, so that the drain water (D1, D2) is prevented from flowing back, and an electromagnetic drain trap (40) for sending out the drain water (D1, D2) together with compressed air, and drain water for oil adsorption and emulsion breakage Management device (70) drain water treatment apparatus generated from the compressed air, characterized in that it has disposed.   Along with the compressor (11), the air tank (14), the refrigeration air dryer (30), the electromagnetic drain trap (40), and the drain water treatment device (70) are packaged refrigeration air dryer mounted type. The apparatus for drain water generated from compressed air according to claim 4, wherein the apparatus is integrally configured as an air compressor (1).   Along with the compressor (11), the air tank (14), the refrigeration air dryer (30), and the electromagnetic drain trap (40) are integrally configured as a package type refrigeration air dryer mounted air compressor (1A). The apparatus for treating drain water generated from compressed air according to claim 4, wherein:   The height difference between the air tank (14) and the installation surface of the refrigeration air dryer (30) is 0.7 to 3.5 m, according to any one of claims 4 to 6. An apparatus for treating drain water generated from compressed air according to item 1.   The treatment of drain water generated from compressed air according to any one of claims 4 to 7, wherein a check valve for preventing backflow is provided in the middle of the drain water pipe (36). apparatus.

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