JP5017573B2 - Method and apparatus for treating drain water generated from compressed air - Google Patents

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. It describes the technology that integrates the drain water generated in the air tank by sending the drain water generated in the refrigeration air dryer to the air tank, and does not just discard the cooled drain water. It is intended to prevent wasteful discharge of energy through effective use.

  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, What is discharged by an electric drain trap (for example, see Patent Document 1) can be seen.

  Here, a conventional compressed air drain treatment method and drain treatment apparatus similar to the treatment method and treatment apparatus for drain water generated from compressed air will be described with reference to Patent Document 1.

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 drain processing apparatus for compressed air for discharging D2, the drain pipe 16 connected to the drain outlet 14b of the air tank 14 and the drain pipe connected to the drain outlet 31c of the refrigeration air dryer main body 31 are provided. B shows a technique constituted by a collecting pipe 41 connected to the collecting pipe 41 and the drain pipes 16 and 36, and an electric drain trap 40 connected to the collecting pipe 41.
JP-A-11-201390

  However, the conventional compressed air drain treatment method and drain treatment apparatus similar to the treatment method and treatment apparatus for drain water generated from such compressed air have the following problems.

  Here, in a method for draining compressed air generated from a plurality of devices, all the drain pipes that drain the drain are gathered, and in the technique of discharging with one electric drain trap, the compressed air cooled by the refrigeration air dryer 30 is used. Air was also used for drainage D2 discharge, and the generated cold drainage D2 was simply discarded.

The present invention includes an air tank 14 that stores compressed air produced by the compressor 11 and a refrigeration air dryer 30 that is cooled to dry air after the compressed air stored in the air tank 14 has been sent into the tank. In the method for treating drain water generated from compressed air, the drain water D2 generated in the refrigeration air dryer 30 is fed into the air tank 14 so that it is integrated with the drain water D1 generated in the air tank 14. Further, the refrigeration air dryer 30 is positioned higher than the air tank 14, and the drain water D <b> 2 is caused by the difference in potential energy between the refrigeration air dryer 30 and the air tank 14 . The reverse flow from the air tank 14 to the refrigeration air dryer 30 is prevented. Furthermore, a function for preventing a back flow is added between the refrigeration air dryer 30 and the air tank 14, and the drain at any point of the air tank 14 is also provided. The above-mentioned problem has been solved by the feature that the drain water D1 is sent out by the amount of water D1 or at regular intervals by the force of compressed air, and further, emulsion breakage and oil adsorption are performed. .

The present invention also relates to an air tank 14 for storing the compressed air produced by the compressor 11 and a refrigeration air that is dried by cooling after the compressed air stored in the air tank 14 has been sent. In a treatment apparatus for drain water generated from compressed air in the dryer 30, the refrigeration air dryer 30 is positioned higher than the air tank 14 for the purpose of discharging drain water D2. A drain water pipe 36 connected to the lower part of the dryer 30 is connected to the air tank 14, whereby the drain water D 2 flows into and joins the drain water D 1 in the air tank 14. Is characterized in that the end of the drain water pipe 36 is positioned near the bottom in the air tank 14, For the purpose of discharging the drain water D1, the drain water pipe 16 connected to the lower part of the air tank 14 and the amount of the drain water D1 stored in the air tank 14 or together with the compressed air at regular intervals. An electromagnetic drain trap 40 for sending drain water D1 is connected to a drain water treatment device 70 for performing emulsion breakage and oil adsorption treatment. Furthermore, the air tank 14, the refrigeration air dryer 30 and the The electromagnetic drain trap 40 is integrally configured as a package type refrigeration air dryer mounted air compressor 1, and further, a reverse flow that prevents backflow from the air tank 14 in the middle of the drain water pipe 36. A stop valve 34 is provided, and the air tank 14 and the refrigeration air dryer are further provided. Difference in height at the installation surface of the Ya 30, by being a 0.7～3.5M, it was to solve the above problems.

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

  First, in the treatment equipment for drain water generated from compressed air in the air tank and the refrigeration air dryer, with the purpose of discharging the drain water, the refrigeration air dryer is positioned higher than the air tank, The drain water pipe connected to the lower part of the refrigeration air dryer is connected to the air tank so that the drain water flows in and joins the drain water in the air tank. Compressed air or drain water cooled by a refrigeration air dryer is used for discharging drainage or is discarded as it is. It was made possible to use it for cooling by joining in the tank. As a result, the energy consumption for cooling the refrigeration air dryer was reduced, and a lower maintenance cost was achieved. As a result, energy saving was achieved.

  Secondly, the potential energy can be effectively secured by positioning the tip of the drain water pipe near the bottom in the air tank.

  Third, for the purpose of discharging drain water, the drain water pipe connected to the lower part of the air tank and the electromagnetic type that sends the drain water together with the compressed air depending on the amount of drain water stored in the air tank or at regular intervals By connecting a drain trap and a drain water treatment device that performs emulsion breakage and oil adsorption treatment, drain water can be reliably turned into clean water without wasteful compressed air being discharged.

  Fourth, the air tank, refrigeration air dryer, and electromagnetic drain trap are integrated as a packaged refrigeration air dryer mounted air compressor, making it easy to transport, easy to install, and requires a small footprint. The device can be provided at low cost.

  Fifth, by providing a check valve to prevent backflow from the air tank in the middle of the drain water piping, it was possible to reliably prevent backflow even in the event of an abnormal situation. is there.

  Sixth, the difference in height between the installation surface of the air tank and the refrigeration air dryer is 0.7 to 3.5 m so that the potential energy for preventing the backflow can be ensured. It was.

  Diagram showing the entire invention of the present application

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.

  As shown in FIG. 1, reference numeral 1 denotes a package type refrigeration air dryer mounted air compressor, which integrates an air compressor 10, a refrigeration air dryer 30, an electromagnetic drain trap 40, and compressed air and drain water piping. Therefore, these devices are housed in the box 1 a, and the compressed air produced by the air compressor 10 by sucking the air 92 from the suction port 13 is the air tank 14 constituting the air compressor 10. And then fed into the refrigeration air dryer 30 by the compressed air discharge pipe 15. However, there is no need to be concerned with the box 1a, and any box may be used as long as all the above-mentioned objects stored on the flat substrate are located.

  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. The water pipes 16 and 36 may be used as support columns instead of the shelf 1b, or may be supported by other methods. In any case, in order to secure potential energy, it is necessary that the refrigeration air dryer 30 is always located higher than the air tank 14. Furthermore, from the viewpoint of securing positional energy that can prevent backflow from the air tank 14 to the refrigeration air dryer 30 side, the difference in height between the air tank 14 and the refrigeration air dryer 30 on the installation surface. Can be said to be 0.7 to 3.5 m.

  Here, the air compressor 10 includes a compressor 11, a motor 12, and an air tank 14. In this case, the motor 12 is operated to rotate the compressor 11 via the belt, so that the air 92 is sucked from the suction port 13 and compressed air is produced by the compressor 11, and the compressed air is put 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, as far as the compressed air discharge pipe 15 is concerned, in any case, 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 nevertheless more reliable 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. It can be said that it shows a high value.

  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,... 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, etc.

  Further, in such a configuration, the cold 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.

  Here, the cold 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 wood body 31 to the drain water pipe 36 and the drain water. A drain water on-off valve 37 that is located in the middle of the pipe 36 and can manually open and close the drain water flow and the fluid is prevented from flowing from the air tank 14 side to the refrigeration air dryer main body 31 side. Then, the air flows into the air tank 14 via the check valve 34. That is, the drain water D2 joins the drain water D1. In addition, regarding the check valve 34, since the potential energy is secured by another method, a configuration of arrangement is also conceivable.

  As a result, the cold drain water D2 has an effect of cooling the air tank 14 and the drain water D1 stored therein. As a result, the cold drain water D2 is not simply discarded, but the air tank 14 is cooled to cool the compressed air therein, thereby reducing the energy consumption of the next refrigeration air dryer 30. It brought it.

  In this case, it can be said that it is most desirable to position the tip of the drain water pipe 36 in the vicinity of the bottom inside the air tank 14 in order to secure potential energy as seen in FIG. However, it is possible to expect a certain effect regardless of whether the leading end of the drain water pipe 36 is located at the center or inside the air tank 14. As a matter of course, the air tank 14 and the drain water pipe 36 need to be completely sealed so as not to leak.

  On the other hand, the drain water D1 collected 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. Via a drain water on-off valve 17 that can manually open and shut off the drain water flow, and further through an electromagnetic drain trap 40 that is located in the middle of the drain water pipe 16 and feeds the drain water together with compressed air. Then, it is sent to a drain water treatment device 70 having functions of oil adsorption and emulsion destruction, and is sent out as clean water 93 that can be drained as it is from a clean water pipe 75 to a river.

  By the way, in the electromagnetic drain trap 40, the drain water D1 is sent out 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 of any type as long as the drain water is discharged by compressed air.

  As shown in the drain water treatment device 70 of FIG. 1, the drain water treatment device 70 includes activated carbon that removes pigments and off-flavors by using an oil adsorbent 72 inside the drain water treatment device main body 71. It is arranged to block the flow of drain water over the entire cross section of the central part, and further adsorbent with emulsion breaking particles and the purpose of adsorbing oil with the purpose of breaking emulsion and adhering emulsion breaking particles to adsorb oil. What adsorbed material is mixed almost uniformly is 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 of the activated carbon in the drain water treatment apparatus main body 71, the activated carbon is contaminated at an extremely early point in the uppermost stream, and the contaminated water flows as the activated carbon itself flows out in the downstream. For this reason, it can be said that it is most desirable to be positioned at the central portion.

  Here, as a structure of the drain water treatment apparatus main body 71, drain water that is a liquid flows into the drain water treatment apparatus main body 71 from an inlet that is an end of the drain water pipe 16, and ends of the clean water pipe 75. Two outlets on the inlet side and the outlet side of the drain water treatment device main body 71 so as to flow uniformly in the drain water treatment device main body 71 before flowing out from the outlet. 71 z is secured, and the inlet which is the end of the drain water pipe 16 and the outlet which is the end of the clean water pipe 75 are positioned.

  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 this case, the oil adsorbing material pressing plate 74 may be any material as long as it can easily pass drain water.

  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. The function of breaking up the emulsified oil and the oil adsorption will also decline.

  Therefore, in order to prevent this even a little, although not specifically illustrated, a large number of small holes are formed in the substantially central portion of the drain water treatment apparatus main body 71 so that the liquid flow can be blocked vertically. In order to support the intermediate porous plate, a cylindrical support material having a diameter smaller than the inner diameter of the drain water treatment device main body 71 is provided between the intermediate porous plate and the oil adsorbent holding plate 74. This prevents the adsorbent with emulsion breaking particles and the oil adsorbent 72, which is an adsorbent, 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. In this case, as the material of the intermediate porous plate, use of a punching plate, a ceramic resin, or the like can be considered as in the case of the oil adsorbent pressing plate 74.

  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 slightly before and after, a considerable effect can be seen, and even if it is filled in any part close to both ends of the drain water treatment apparatus main body 71, a certain effect is 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. Further, 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, with respect to the amine used in the present invention, an amine compound or a derivative thereof can be considered, and when the amine compound or the derivative thereof is 25 ° C., it is preferably solid, but the compound is non-solid at 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 in the adsorbent and the adsorbent with emulsion breaking particles need not be limited to the above-mentioned one, and has the function of adsorbing oil and not dissolving water. Also, activated carbon, large sawdust, etc. are conceivable, and other materials having the same properties may be used.

  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 ( It can be said that the size is 30 to 80 mm) × (5 to 40 mm). In particular, it can be said that it is most desirable 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 types of small pieces of 60 mm × 40 mm or less and different sizes of 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, the compressed air condenses and accumulates as drain water D <b> 1 on 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, the compressed air is supplied by operating various actuators such as an air cylinder mounted on the tip of the compressed air discharge valve 35 located at the tip of the compressed air discharge pipe 35. Then, the compressed air stored in the air tank 14 is sent to the refrigeration air dryer 30 through the compressed air discharge pipe 15. In the process of cooling the compressed air also in the refrigeration air dryer 30, the compressed air is condensed and collected as drain water D <b> 2 at the bottom of the refrigeration air dryer main body 31.

  Here, the cooled compressed air becomes dry compressed air, and performs some operation as dry compressed air 91 via the compressed air discharge pipe 35 and the compressed air on / off valve 38 from the compressed air outlet 31b. It is sent to various actuators such as air cylinders and air motors.

  The drain water D2 accumulated at the bottom of the refrigeration air dryer main body 31 is supplied to the air tank via the drain water pipe 36, the drain water on-off valve 37 and the check valve 34 located in the middle of the drain water pipe 36. 14 is fed into the drain water D1. In this case, the pressure in the refrigeration air dryer 30 becomes lower than the pressure in the air tank 14 by causing the pressure to be lost while the compressed air flows through the compressed air discharge pipe 15. On the other hand, since the refrigeration air dryer 30 is positioned higher than the air tank 14, the drain water D2 always secures potential energy.

  In addition, the positional energy is ensured by positioning the refrigeration air dryer 30 at an appropriate height, and the value is always higher than the pressure in the air tank 14 by adding the positional energy to the pressure in the refrigeration air dryer 30. It is possible to secure a high value. As a result, the fluid is prevented from flowing back from the air tank 14 to the refrigeration air dryer 30 side.

  However, as an exceptional abnormal situation, it may be necessary to locate the check valve 34 in the middle of the drain water pipe 36. That is, as an exceptional abnormal situation, when the pressure in the air tank 14 fluctuates for some reason, the pressure instantaneously decreases, or the height of the air tank 14 and the refrigeration air dryer 30 is increased. It is possible to cope with the case where the potential energy of the drain water D2 generated from the compressed air in the refrigeration air dryer 30 is insufficient while the difference between the two is sufficiently secured. It is possible to arrange by this.

  As an example, the pressure in the air tank 14 fluctuates as a result of a power source connected to the motor 12, a failure or aging of the compressor 11 or the motor 12, or an abnormality in the suction port 13. Also, clogging of various pipes can be considered.

  Here, the cold drain water D2 joins the drain water D1 in the air tank 14 to bring about an effect that the air tank 14 is cooled. From another point of view, this means that the compressed air in the air tank 14 is cooled, and as a result, the energy consumed by the refrigeration air dryer 30 is reduced.

  On the other hand, the drain water D1 accumulated at the bottom of the air tank 14 is sent to the drain water pipe 16 and the drain water on-off valve 17 and the electromagnetic drain trap 40 located in the middle of the drain water pipe 16. In this case, in the electromagnetic drain trap 40, the drain water D1 is sent out together with the compressed air by opening the drain water D1 stored in the air tank 14 at regular intervals, or by draining the drain water D1. 16, the drain water is fed into the drain water treatment device 70 together with the compressed air.

  In the drain water treatment apparatus 70, first, drain water and compressed air sent from the drain water pipe 16 flow from the lower part to the upper part of the drain water treatment apparatus 70, and the emulsion breaking particles are removed along the way. Emulsion breakage is achieved by randomly passing the adsorbent with emulsion breaking particles and the adsorbent adsorbent adsorbing adsorbent with emulsion breaking particles, and the adsorbent that adsorbs oil almost uniformly. In the adsorbent with particles, the emulsion breaks up by releasing the water-oil bond of the emulsified oil, and the separated oil is adsorbed, and the adsorbent adsorbs the oil that could not be adsorbed by the adsorbent with emulsion-breaking particles. After improving the cleanliness of the drain water by repeatedly performing such a treatment many times at random, it is produced as clean water 93 from the clean water pipe 75. There. However, 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 toward the lower part.

  And when drain water passes activated carbon, an odor and a pigment | dye are removed. 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.

  As an example, specifically, how much of the oil adsorbent 72 is filled is shown to be approximately 200 mm with respect to the drain water generated from the screw type air compressor 10 of 55 Kw to 110 Kw. The drain water treatment device main body 71, which is a cylinder having a height of 950 mm, is filled with 2.5 kg of an adsorbent with 45 mm × 25 mm of a polypropylene non-woven fabric and 45 mm × 5 mm of an adsorbent of polypropylene non-woven fabric. Two sets of drain water treatment apparatuses 70 filled with 2.5 kg and filled with 1 kg of activated carbon are used in parallel.

  A technique relating to a treatment method and a treatment apparatus for drain water generated from compressed air, and more specifically, a method for treating drain water generated from compressed air by an air tank and a refrigeration air dryer. Describes the technology that integrates the drain water generated in the dryer with the drain water generated in the air tank by sending the drain water generated in the dryer to the air tank. In particular, the cooled drain water is not just discarded but effectively used. The content is intended to prevent wasteful discharge of energy. In other words, energy saving is considered.

1 ··················· Packaged refrigeration air dryer mounted air compressor 1a ··· Box 1b ··· 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 ·································································································································· Freezer Air dryer body 31a ... compressed air inlet 31b ... compressed air outlet 31c ... drain water outlet 32 ... refrigerant circulation device 33 ...・ Refrigerant piping 33a ...... Fin 34 ... Check valve 35 ... Compressed air discharge Piping 36 ··· Drain water piping 37 ··· Drain water on-off valve 38 ··· Compressed air on-off valve 40 ··· Electromagnetic drain trap 70 ···・ Drain water treatment device 71... Drain water treatment device main body 71 z... Space 72... Oil adsorbent 73. Oil adsorbent holding plate 75... Clean water piping 91... Dry compressed air 92... Air 93... Clean water D 1. Drain water D2 ... Drain water

Claims (10)

An air tank (14) for storing the compressed air produced by the compressor (11), and a refrigeration type air that is compressed into dry compressed air by cooling after the compressed air stored in the air tank (14) is sent In the method for treating drain water generated from compressed air by a dryer (30), the drain water (D2) generated by the refrigeration air dryer (30) is fed into the air tank (14), whereby the air tank A method for treating drain water generated from compressed air, wherein the drain water (D1) generated in (14) is integrated. The refrigeration air dryer (30) is positioned higher than the air tank (14), and the drain water (D2) has a difference in potential energy between the refrigeration air dryer (30) and the air tank (14). The method for treating drain water generated from compressed air according to claim 1, wherein the air tank (14) does not flow backward to the refrigeration air dryer (30).   The treatment of drain water generated from compressed air according to claim 1 or 2, wherein a function of preventing a backflow is added between the refrigeration air dryer (30) and the air tank (14). Method.   The drain water (D1) is sent out by the amount of the drain water (D1) at any point of the air tank (14) or at regular intervals by the force of compressed air, and further, emulsion breakage and oil The method for treating drain water generated from compressed air according to any one of claims 1 to 3, wherein an adsorption treatment is performed. An air tank (14) for storing the compressed air produced by the compressor (11), and a refrigeration type air that is compressed into dry compressed air by cooling after the compressed air stored in the air tank (14) is sent In a treatment apparatus for drain water generated from compressed air by a dryer (30), the refrigeration air dryer (30) is positioned higher than the air tank (14) for the purpose of discharging drain water (D2). In this state, a drain water pipe (36) connected to the lower part of the refrigeration air dryer (30) is connected to the air tank (14), whereby the drain water (D2) flows into the air tank (14 The apparatus for treating drain water generated from compressed air, characterized in that it merges with the drain water (D1) inside.   The apparatus for treating drain water generated from compressed air according to claim 5, wherein a tip of the drain water pipe (36) is positioned in the vicinity of a bottom portion in the air tank (14).   For the purpose of discharging the drain water (D1), the drain water pipe (16) connected to the lower part of the air tank (14) and the amount of the drain water (D1) stored in the air tank (14). Alternatively, an electromagnetic drain trap (40) for sending out the drain water (D1) together with compressed air at regular intervals and a drain water treatment device (70) for performing emulsion breakage and oil adsorption treatment are connected. The processing apparatus of the drain water generated from the compressed air of Claim 5 or Claim 6.   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 (1). The apparatus for treating drain water generated from the compressed air according to Item 7.   The check valve (34) for preventing a backflow from the air tank (14) is provided in the middle of the drain water pipe (36), according to any one of claims 5 to 8. For drain water generated from compressed air.   The height difference in the installation surface of the said air tank (14) and the said refrigerating type air dryer (30) is 0.7-3.5m, The any one of Claim 5 thru | or 9 characterized by the above-mentioned. An apparatus for treating drain water generated from compressed air according to item 1.

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