JP2010270743A - Treatment method and treatment device of drain water generated from compressed air - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem that there has been performed useless work in terms of energy efficiency since there is no idea for not using compressed air which is not cooled, and there is a necessity for performing control so that an air compressor and an after-cooler which use power should correspond to each other since they are not integrated with each other, and also it can be said that it is useless to connect the after-cooler large in the generation of drains and the other apparatus small in the generation of drains. <P>SOLUTION: In this treatment method of drain water generated from the compressed air by an air tank 14 and a refrigerating air drier 30 of constituting a package type refrigerating air drier-mounted air compressor 1 for performing operating by a single power source, drain water D1 from the air tank 14 is sent out by an electromagnetic drain trap 40 together with the uncooled compressed air, and drain water D2 from the refrigerating air drier 30 is merged by a drain trap 50 at its downstream side. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a method and apparatus for treating drain water generated from compressed air. More specifically, the present invention constitutes a package type refrigeration air dryer mounted air compressor that is operated by a single power source. In the method of treating drain water generated from compressed air by the air tank and the refrigeration air dryer, the drain water from the air tank is sent out together with the uncooled compressed air by an electromagnetic drain trap and refrigerated downstream. It describes the technology of condensing the drain water from the air dryer using a drain trap, and is particularly effective in preventing wasteful energy discharge.

  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, Drain generated by an electric drain trap (see, for example, Patent Document 1) or compressed air generated by an air compressor while passing through various devices such as an aftercooler, an air tank, an air dryer, and an air filter In the drain treatment method for treating the waste water, at least the drain staying in the air tank is sent to the drain treatment device together with the compressed air, so that the drain treatment is performed together with all the drains generated while passing through various devices by the action of the compressed air. Some of them are sent to the device to make fresh water (for example, patent literature) Reference).

  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 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. 2 shows a technique constituted by a pipe 36, a collecting pipe 41 connected to the drain pipes 16 and 36, and an electric drain trap 40 connected to the collecting pipe 41.
JP-A-11-201390

  Next, a conventional drain treatment method and drain treatment system similar to a treatment method and a treatment apparatus for drain water generated from compressed air will be described with reference to Patent Document 2.

In this case, in Patent Document 2, the compressed air produced by the air compressor 10 is used to process drainage generated while passing through various devices such as the aftercooler 20, the air tank 30, the air dryer 40, and the air filter 50. In the drain processing system provided with the drain processing device 60, the air discharge for discharging the drain staying in the air tank 30 in the middle of the drain pipes 131, 132, 133, 134 connected to the air tank 30 together with the compressed air. A technique in which a mold drain trap 81 is provided is shown.
JP 2001-165400 A

  However, with regard to a conventional compressed air drain treatment method and drain treatment apparatus, a drain treatment method and a drain treatment system, which are similar to a treatment method and treatment apparatus for drain water generated from such compressed air, There was a problem as shown.

  First, in a method for draining compressed air generated from a plurality of devices, all of the drain pipes that discharge drain are gathered, and in a technique of discharging with one electric drain trap, compressed air cooled by a refrigeration air dryer 30 is used. However, wasteful work was performed from the viewpoint of energy efficiency in which the drain D2 was used for discharging.

  On the other hand, in the drain treatment method for treating the drain generated while the compressed air produced from the air compressor passes through various devices such as an aftercooler, an air tank, an air dryer, and an air filter, at least the air stays in the air tank. Even if the technology is used to send the drain to the drain treatment device together with the compressed air, the technology to send the drain to the drain treatment device together with all the drains generated during the passage of various devices by the action of the compressed air to make it clean water. The idea is not to use compressed air that has not been cooled simply because the drain that is being discharged is discharged together with the compressed air, and wasteful work has been performed in view of energy efficiency. In addition, since the air compressor and aftercooler that use the power source are not integrated, it is necessary to control each other separately, and the aftercooler that generates a lot of drainage and the generation of drainage It could be said that connecting all the few other devices to the drain collecting pipe was a wasteful process.

  The present invention relates to a method for treating drain water generated from compressed air by an air tank 14 and a refrigeration air dryer 30 constituting a packaged refrigeration air dryer mounted air compressor 1 that is operated by a single power source. However, the drain water D1 from the air tank 14 is sent out together with the uncooled compressed air by the electromagnetic drain trap 40, and the drain water D2 from the refrigeration air dryer 30 is joined downstream by the drain trap 50. Furthermore, the combined drain water is sent to a drain water treatment device 70 that performs oil adsorption and emulsion breakage by the force of compressed air, and drain water D3 generated in other equipment 60 as necessary. It is possible to inject into the drain water treatment device 70 manually. Furthermore, the drain trap 50, by which is a float, it had to solve the above problems.

  In addition, the present invention treats drain water generated from compressed air by the air tank 14 and the refrigeration air dryer 30 constituting the packaged refrigeration air dryer mounted air compressor 1 that is operated by a single power source. In the apparatus, for the purpose of discharging the drain water D1, depending on the drain water pipes 16, 93 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 for a certain period of time. An electromagnetic drain trap 40 that sends out the drain water D1 together with uncooled compressed air, a drain water collecting pipe 94, and a drain that allows the drain water to be fed from above into a state open to the atmosphere. A drain connected to the lower part of the refrigeration air dryer 30 for the purpose of connecting the water treatment device 70 and discharging the drain water D2. After the water pipes 36 and 92 and the float type drain trap 50 are disposed, the water pipes 36 and 92 are joined together between the drain water pipe 93 and the drain water collecting pipe 94. An injection hole 71a is formed in the upper part of the drain water treatment device 70 so that the drain water D3 generated in the device 60 can be manually poured into the drain water treatment device 70. Thus, the above-mentioned problem has been solved.

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

  First, in a method for treating drain water generated from compressed air in a packaged refrigeration air dryer mounted air compressor that is operated by a single power source and a refrigeration air dryer, Compressed air cooled by a refrigeration air dryer by sending out drain water from an air tank together with uncooled compressed air with an electromagnetic drain trap, and condensing the drain water from the refrigeration air dryer downstream with the drain trap. The use of drain for discharging can prevent unnecessary work from the viewpoint of energy efficiency. In addition, a simple and inexpensive configuration has been achieved by specializing in the use of a single power source and the treatment of drain water with an air tank and a refrigeration air dryer.

  Second, the combined drain water is sent to a drain water treatment device that performs oil adsorption and emulsion breakage by the force of compressed air, and if necessary, drain water generated by other equipment is manually drained water treatment device. This makes it possible to treat even a small amount of drain water at a low cost by a very simple method.

  Thirdly, because the drain trap is a float type, when drain water is discharged from a refrigeration air dryer, there is no longer any need to reduce the discharge of cooled compressed air to zero. is there.

  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, in which an air compressor 10 and a refrigeration air dryer 30 are housed, and the compressed air produced by the air compressor 10 is compressed air. The refrigerant is fed into the refrigeration air dryer 30 by the discharge pipe 15. However, although the refrigeration air dryer 30 is arranged on the shelf 1a, there is no need to stick to this place without the shelf 1a, and the compressed air discharge pipes 15 and 35 and the drain water pipe 36 are supported. The supporting column may be used instead of the shelf 1a or may be supported by other methods.

  Here, the air compressor 10 includes a compressor 11, a motor 12, and an air tank 14. In this case, by operating the motor 12 and rotating the compressor 11 via the belt, air is sucked from the suction port 13, compressed air is created by the compressor 11, and the compressed air is stored in the air tank 14. It is the composition. 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. Also, in such a configuration, drain water D1 condensed from the compressed air is accumulated at the bottom of the air tank 14.

  On the other hand, the refrigeration air dryer 30 contains a refrigerant circulation device 32 and a refrigerant pipe 33 each composed of an accumulator, a compressor, and a condenser in a refrigeration air dryer main body 31, such as ammonia, freon, etc. The refrigerant is structured to cool the compressed air by circulating between the refrigerant circulation device 32 and the refrigerant pipe 33. 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 opened and shut off by the compressed air discharge pipe 35 connected to the compressed air outlet 31b formed in the refrigeration air dryer body 31 and the compressed air flow. The compressed air on-off valve 38, the compressed air discharge pipe 91, and the other place 60 arranged in the middle of the compressed air discharge pipe 91 are passed through the compressed air on and off as an air cylinder or an air motor.・ It can flow to various actuators such as. In this case, in FIG. 1, only the air filter 60 is shown as the other device 60. However, a single dryer or a plurality of other filters may be arranged side by side or in series.

  Further, in such a configuration, the drain water D2 condensed from the compressed air in the refrigeration air dryer 30 is accumulated at the bottom of the refrigeration air dryer main body 31. Further, from other devices 60 in which the air filter 60 is shown as an example, drain water condensed from the compressed air passes through the drain water pipe 95 connected to the lower part, and in addition, is located in the middle of the drain water pipe 95. The drain water 103 is drained by a drain water receiving valve 64 through a drain water on-off valve 61 that can manually open and shut off the drain water flow and a drain trap 62 through which a certain amount of drain water accumulates. Is stored as drain water D3. As a matter of course, when a plurality of other devices 60 are located, a plurality of drain pans 64 are provided.

  On the other hand, the drain water D1 accumulated at the bottom of the air tank 14 is opened and shut off by manually opening the drain water flow from the drain water discharge port 14b formed at the bottom of the air tank 14. The drain water opening / closing valve 17, the drain water pipe 93, the electromagnetic drain trap 40 that is located in the middle of the drain water pipe 93 and sends the drain water together with the compressed air, and the drain water collecting pipe 94. Thus, the upper part is opened to the atmosphere and sent to the upper part of the drain water treatment device 70 having the functions of oil adsorption and emulsion destruction, and becomes the clean water 102 that can be drained as it is from the lower clean water pipe 96 to the river. Are sending out. By the way, in the electromagnetic drain trap 40, the drain water D1 is sent out together with the uncooled compressed air depending on the amount of the drain water D1 stored in the air tank 14 or at regular intervals.

  Further, the drain water D2 accumulated at the bottom of the refrigeration air dryer main body 31 is drained from a drain water discharge port 31c formed at the bottom of the refrigeration air dryer main body 31 and drain water manually. A drain water on-off valve 37 that can open and shut off the flow, a drain water pipe 92, and a drain trap 50 that is located in the middle of the drain water pipe 92 and that can be sent out when the drain water has accumulated. The drain water collecting pipe 94 is joined. The drain trap 50 can be considered to be an electromagnetic type that sends out drain water together with compressed air. However, if the drain trap 50 is based on the idea of eliminating the discharge of cooled compressed air as much as possible, the drain trap 50 itself may store drain water. A floating drain trap 50 having a structure is desirable.

  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 gets dirty quickly in the uppermost stream, and the activated water itself flows out in the downstream, so that it looks like dirty water flows. It is desirable to be positioned approximately at the center.

  Here, the drain water treatment apparatus main body 71 has a structure in which drain water, which is a liquid, flows into the drain water treatment apparatus main body 71 from an inflow port that is an end of the drain water collecting pipe 94, and ends the clean water pipe 96. 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 end of the drain water collecting pipe 94 and the outlet which is the end of the clean water pipe 96 are positioned 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, 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.

  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 amine compounds 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.

  On the other hand, the drain water treatment apparatus main body 71 is formed with an injection hole 71a in the upper part thereof. The purpose of this is that, unlike the air tank 14 and the refrigeration air dryer 30, the other devices 60 including the air filter 60 generate considerably less drain water, and the stored drain water is also treated by collecting the drain water. This is based on the idea that it is better to carry out another treatment rather than sending it to the drain water treatment device 70 via the pipe 94. Specifically, the drain water generated in the other equipment 60 is considered to be generated several times in the drain water receiver 64 during several months. Accordingly, the drain water D3 stored in the drain water receiver 64 is based on the idea of manually injecting into the drain water treatment device 70 from the injection hole 71a and thereby using the clean water 102. In this way, it is considered that it is unnecessary to extend the drain water collecting pipe 94 wastefully.

  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 transmission of the belt, compresses the air sucked from the suction port 13 and stores the compressed air 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, when compressed air is supplied by the operation of various actuators such as air cylinders mounted at the ends of the compressed air discharge pipes 35, 91, the compressed air stored in the air tank 14 is supplied. It is fed into 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 is arranged in the middle of the compressed air discharge pipe 35, the compressed air on-off valve 38, the compressed air discharge pipe 91, and the compressed air discharge pipe 91 from the compressed air outlet 31b. It passes through other devices 60 such as the installed air filter 60 and is sent as dry and clean compressed air 101 to various actuators such as an air cylinder and an air motor.

  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, the drain water on-off valve 17, the drain water pipe 93, 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 together with the uncooled compressed air by opening the drain water D1 stored in the air tank 14 at regular intervals. The drain water is fed into the drain water treatment device 70 together with the compressed air via the drain water pipe 93 and the drain water collecting pipe 94. In particular, in the present invention, the drain water D1 is sent out using compressed air that has just been made by the compressor 11 and is not cooled.

  Then, the drain water D2 accumulated at the bottom of the refrigeration air dryer main body 31 is sent to the drain trap 50 located in the middle of the drain water pipe 36, the drain water on-off valve 37, the drain water pipe 92, and the drain water pipe 92. It is. In this case, in the drain trap 50, when a certain amount of drain water accumulates in the case of the float drain trap 50, the drain water is sent to the drain water pipe 92 and joined to the drain water collecting pipe 94. It has become. On the other hand, when the drain trap 50 is an electromagnetic drain trap, it is necessary to adjust so as not to discharge the compressed air as much as possible in order to eliminate waste.

  In the drain water treatment device 70, first, the drain water and the compressed air fed from the drain water collecting pipe 94 are lifted up to the upper portion of the drain water treatment device 70 and released into the atmosphere. By storing the adsorbent with emulsion breaking particles and the adsorbent that adsorbs oil almost uniformly in a mixed state, and randomly passing through the adsorbent with emulsion breaking particles and the adsorbent. In the adsorbent with emulsion breaking particles, the emulsion breaks up by releasing the water-oil bond of the emulsified oil, and the separated oil is adsorbed, and the adsorbent cannot adsorb with the adsorbent with emulsion breaking particles. And the clean water 10 from the clean water pipe 96 after improving the cleanliness of the drain water by performing such a treatment repeatedly at random. It has produced as.

  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.

  A technique relating to a method and apparatus for treating drain water generated from compressed air, more specifically, air constituting a package type refrigeration air dryer mounted air compressor operated by a single power source In a method for treating drain water generated from compressed air in a tank and a refrigeration air dryer, drain water from the air tank is sent together with uncooled compressed air by an electromagnetic drain trap, and downstream from the refrigeration air dryer. This technology describes the technology that joins the drain water with a drain trap, and in particular prevents wasteful energy discharge. In other words, energy saving is considered.

1 ······················· Packaged refrigeration air dryer mounted air compressor 1a ··· 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 Discharge pipe 16 ... Drain water pipe 17 ... Drain water on-off valve 30 ... Refrigerating air dryer 31 ... Refrigerating air dryer body 31a ... Compressed air inlet 31b Compressed air outlet 31c Drain water outlet 32 Refrigerant circulation device 33 Refrigerant piping 33a・ Fin 35 ・ ・ ・ ・ ・ ・ Compressed air discharge piping 36 ・ ・ ・ ・ ・ ・ Drain water piping 37 ・.... drain water off valve 38 ...... compressed air on-off valve 40 ...... electromagnetic drain trap 50 ...... drain trap (float drain trap)
60 .... Air filter (other equipment)
61 .... Drain water on-off valve 62 ... Drain trap 64 ... Drain water receiver 70 ... Drain water treatment device 71 ... Drain water Processing unit main body 71a... Injection hole 71z... Space 72... Oil adsorbent 73.・ ・ ・ ・ ・ ・ Compressed air discharge pipe 92 ・ ・ ・ ・ ・ ・ Drain water pipe 93 ・ ・ ・ ・ ・ ・ Drain water pipe 94 ・ ・ ・ ・ ・ ・ Drain water collecting pipe 95 Pipe 96 ····················································································································· Drain water D1 ... Drain water D3 ... Drain water

Claims (5)

  Treatment of drain water generated from compressed air by the air tank (14) and the refrigeration air dryer (30) constituting the package type refrigeration air dryer mounted air compressor (1) operated by a single power source In the method, drain water (D1) from the air tank (14) is sent together with uncooled compressed air by an electromagnetic drain trap (40), and drained from the refrigeration air dryer (30) downstream thereof. A method for treating drain water generated from compressed air, wherein water (D2) is joined by a drain trap (50).   The combined drain water is sent to a drain water treatment device (70) that performs oil adsorption and emulsion breakage by the force of compressed air, and manually drain water (D3) generated by other equipment (60) as necessary. The method for treating drain water generated from compressed air according to claim 1, characterized in that it can be injected into the drain water treatment device (70).   The method for treating drain water generated from compressed air according to claim 1 or 2, wherein the drain trap (50) is a float type.   Treatment of drain water generated from compressed air by the air tank (14) and the refrigeration air dryer (30) constituting the package type refrigeration air dryer mounted air compressor (1) operated by a single power source In the apparatus, for the purpose of discharging drain water (D1), drain water pipes (16, 93) connected to the lower part of the air tank (14), and the drain water stored in the air tank (14). An electromagnetic drain trap (40) that sends out the drain water (D1) according to the amount of (D1) or together with compressed air that is not cooled at regular intervals, a drain water collecting pipe (94), and open to the atmosphere For the purpose of connecting a drain water treatment device (70) capable of feeding drain water from above into the state and discharging drain water (D2), -Between the drain water pipe (93) and the drain water collecting pipe (94) after the drain water pipes (36, 92) connected to the lower part of the dryer (30) and the float type drain trap (50) are disposed. An apparatus for treating drain water generated from compressed air.   If necessary, the drain water (D3) generated in the other device (60) can be manually injected into the drain water treatment device (70). The apparatus for treating drain water generated from compressed air according to claim 4, wherein an injection hole (71a) is formed in an upper part.

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