JP3651427B2 - Drain water treatment equipment for drain water generated from compressed air - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a drain water treatment apparatus for drain water generated from compressed air. More specifically, the present invention releases the bond between the water and the oil of the drain water that is emulsified by the combination of fine oil with water. The present invention relates to a technique for performing an oil-water separation process by causing emulsion breakage, and a technique for drain water sent to a drain water treatment apparatus being discharged as fresh water without requiring any power.
[0002]
[Prior art]
Conventionally, there have been many techniques for separating drainage water generated from compressed air from foreign substances that are lighter than water or heavier than water from dirty drain water.
[0003]
In addition, there were a filter, an oil adsorbent, an electrolysis, and a chemical.
[0004]
In addition, as a technique using an adsorbent with emulsion breaking particles, as shown in Japanese Patent Application Laid-Open No. 54-6352, an emulsion in wastewater is treated with a treatment material in which an amine or the like is attached to a support. A method of separating oil and water by performing two-stage treatment in separate tanks such as treatment with an oil adsorbent such as polypropylene after grain coarsening or destruction has been shown.
[0005]
Furthermore, as another technique using the adsorbent with emulsion breaking particles, as seen in Japanese Patent Application Laid-Open No. 2001-113269, an oil adsorbing layer composed of an oil adsorbing material having relatively low hydrophilicity and an emulsion treatment material are used. Or the oil-water separator which laminated | stacked multiple sets of emulsion decomposition layers which consist of an oil adsorbent with comparatively large hydrophilic property alternately was shown.
[0006]
On the other hand, as a technique in which drain water sent to the drain water treatment device is discharged as fresh water without requiring any power, as shown in Japanese Utility Model Publication No. 63-136703, oil water is discharged by gravity. A technique is shown in which a support tank, an adsorbing layer filled with an oil adsorbing material, and a treatment tank formed with a reservoir for storing floating oil are fed using a liquid level difference from a cushion tank that separates the oil.
[0007]
In addition, as another technique in which the drain water sent to the drain water treatment device is discharged as fresh water without requiring any power, as seen in the published patent publication of JP-A-5-60071, the upper part is An oil / water separation tank that is opened and an oil adsorption tank that is open at the top for allowing the separated water in the oil / water separation tank to flow in, and the oil level of the oil / water separation tank is higher than the oil adsorbent in the oil adsorption tank The technique which arrange | positioned the oil-water separation tank and the oil adsorption tank so that it may become a position higher than the extraction port of the clarified water after adsorption | suction is shown.
[0008]
[Problems to be solved by the invention]
However, such a conventional drain water treatment apparatus for drain water generated from compressed air has the following problems.
[0009]
First, separation of oil from drain water that is emulsified by the combination of minute oils with water is based on the difference in density between water and oil or foreign materials, by filters, or by oil adsorbents. It was almost impossible with a simple device such as. Further, the clogging due to the foreign matter is early, and the maintenance at that time is complicated.
[0010]
Secondly, the electrolysis and chemical chemicals required larger costs due to the larger equipment required for completeness.
[0011]
Thirdly, combining these methods to form an oil-water separator improves processing capacity, including emulsion breakage, but tends to be large and expensive, creating an efficient device. I had a hard time.
[0012]
Fourthly, in the two-stage process performed in the separate tanks for emulsion breakage and oil adsorption, as shown in Japanese Patent Application Laid-Open No. 54-6352, a flow path through which drain water flows easily is selected during the oil adsorption process. As a result, only a specific portion of the adsorbent was passed through, and as a result, the need to replace the adsorbent at an early stage was often encountered. In addition, because the emulsion breakage treatment material has more resistance than the oil adsorbent, the emulsion breakage treatment material has been reduced in capacity to balance the two, but on the other hand, it is not suitable for drainage water that is very dirty. If the capacity of the emulsion breaking treatment material needs to be increased and if it is to be increased to some extent in response to dirt, the ratio of the emulsion breaking treatment material to the whole should be increased in order to reduce the overall size. When drain water flows, there is a problem that the balance is not balanced in terms of resistance. Furthermore, the published patent publication of Japanese Patent Application Laid-Open No. 54-6352 only describes the processing of emulsion breakage and oil adsorption, and does not use power for the entire drain water treatment or the way of drain water in the course of the drain water treatment. He did not mention how to do it at all.
[0013]
Fifth, the oil adsorption and emulsion decomposition processes described in Japanese Patent Application Laid-Open No. 2001-113269 are only described in an oil / water separator in which a plurality of sets of oil adsorption layers and emulsion decomposition layers are alternately stacked. However, it did not mention at all how to perform the drain water treatment without using power in the whole drain water treatment or in the middle of the process.
[0014]
Sixth, the idea of processing emulsified oil is shown in the compressor drain treatment device found in the published utility model publication of Japanese Utility Model Laid-Open No. 63-136703, but specific details regarding the oil adsorbent are described. However, it was not possible to confirm whether the emulsified oil was reliably adsorbed by the oil adsorbing material in the adsorbing layer only by the contents as described herein.
[0015]
Seventh, in the drain oil / water separator in the air compressor, as disclosed in Japanese Patent Laid-Open No. 5-60071, the response to the emulsified oil is not clear, and in addition, the oil adsorbing tank whose upper part is open Then, there was a problem that oil was scattered around and dirty.
The present invention aims to solve such problems.
[0016]
[Means for Solving the Problems]
The present invention includes an oil separation chamber 11x filled with an oil absorbing material 11s having a function of separating various foreign substances that flow into the drain water as the drain water flows and becomes oil and solids, and a relatively clean drain. An oil separation tank 10 that forms two chambers of a water storage chamber 11y into which water flows in and drain water can enter and exit at the lower part and the upper part is opened above the liquid level WL in the water storage chamber 11y. A sealed emulsion containing a connecting pipe 271 for supplying drain water, an adsorbent 32 with emulsion breaking particles to which emulsion breaking particles are attached, an oil adsorbing material 33 for adsorbing oil, and activated carbon 34 for removing pigments and off-flavors. A breaking oil adsorbing tank 30 and a fresh water pipe 281 for sending fresh water after being processed in the emulsion breaking oil adsorbing tank 30 are disposed, and the liquid level WL and drain water above the liquid level WL are discharged. And then, a head H is secured between the emulsion breaking oil adsorbing tank 30 and the position where the drain water is raised to the highest position of any one of the fresh water pipes 281, The connecting pipe 271 is connected to an inlet 31 a formed at the lower part of the emulsion breaking oil adsorption tank 30, and the fresh water pipe 281 is connected to an outlet 31 b formed at the upper part of the emulsion breaking oil adsorption tank 30. Furthermore, the emulsion breaking oil adsorbing tank 30 contains at least one layer of the activated carbon 34 by alternately laminating the adsorbents 32 with emulsion breaking particles and the oil adsorbing material 33 in the order described. Furthermore, the emulsion breaking oil adsorption tank main body 31 constituting the emulsion breaking oil adsorption tank 30 and the oil separation tank 1 are characterized in that An oil separation tank body 11 constituting the, by characterized in that the visible inside the situation from the outside, the above-mentioned problems are eliminated.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
A drain water treatment apparatus for drain water generated from compressed air according to the present invention will be described in detail with reference to the drawings.
Here, FIG. 1 is an overall view of an embodiment showing the present invention, and FIG. 2 is a detailed view of an emulsion breaking oil adsorption tank constituting the drain water treatment apparatus of the present invention.
[0018]
As shown in FIG. 1, 110 is an air compressor, which is not specifically shown, and is composed of a motor and a compressor. By transmitting the rotation of the motor to the compressor by a belt, compressed air is taken in while taking in the atmosphere. Producing.
[0019]
Here, the compressed air produced by the air compressor 110 is compressed air piping 201, aftercooler 120, compressed air piping 202, air tank 130, compressed air piping 203, dryer 140, and compressed air piping 204. The compressed air can be supplied to various pneumatic devices such as an air motor and an air cylinder via the filter 150 and the compressed air pipe 205.
[0020]
In this case, the compressed air is dried by the aftercooler 120 and the dryer 140, and various foreign matters such as oil and solids are removed by the filter 150, so that the dried clean compressed air is supplied to various pneumatic devices. You can do that.
[0021]
On the other hand, from the aftercooler 120, a drain discharge pipe 211a, a valve 221 that can be opened and closed, a drain discharge pipe 211b, an electric drain trap 222 that discharges drain water together with compressed air by any signal, and a drain discharge The pipe 211c, a check valve 223 that prevents backflow from downstream to upstream, and a drain discharge pipe 211d are connected to the collecting pipe 261 so that drain water can be discharged.
[0022]
Moreover, from the lower part of the air tank 130 which stores compressed air, the drain discharge pipe 212a, the valve 231 which can be opened and closed, the drain discharge pipe 212b, and the electric motor which discharges drain water together with the compressed air by some signal. A drain trap 232 of the type, a drain discharge pipe 212c, a check valve 233 for preventing a reverse flow from downstream to upstream, and a drain discharge pipe 212d are connected to the collecting pipe 261 at the uppermost stream, and drain water Can be discharged.
[0023]
Furthermore, from the dryer 140, a drain discharge pipe 213a, a valve 241 that can be opened and closed, a drain discharge pipe 213b, an electric drain trap 242 that discharges drain water together with compressed air by any signal, and a drain discharge pipe 213c, a check valve 243 that prevents a reverse flow from downstream to upstream, and a drain discharge pipe 213d are connected to the collecting pipe 261 so that drain water can be discharged.
[0024]
In addition, from the filter 150, a drain discharge pipe 214a, an openable / closable valve 251, a drain discharge pipe 214b, an electric drain trap 252 that discharges drain water together with compressed air by any signal, drain discharge The pipe 214c, a check valve 253 that prevents backflow from downstream to upstream, and the drain discharge pipe 214d are connected to the collecting pipe 261 so that drain water can be discharged.
[0025]
Here, fresh water is discharged from the fresh water pipe 281 from the collecting pipe 261 via the check valve 265, the collecting pipe 262, and the drain water treatment apparatus 1 that separates oil and various foreign substances. . In this case, the check valve 265 allows drain water to flow from the collecting pipe 261 to the collecting pipe 262, but does not cause the drain water to flow backward from the collecting pipe 262 to the collecting pipe 261. However, a configuration in which the check valve 265 is not disposed is also conceivable. Further, the fresh water discharged from the fresh water pipe 171 is purified to such an extent that it can be discharged into a river or the like as it is.
[0026]
In this case, the drain water treatment apparatus 1 includes an oil separation tank 10 and an emulsion breaking oil adsorption tank 30, and the connection pipe 271 connects the oil separation tank 10 and the emulsion breaking oil adsorption tank 30.
[0027]
Further, the emulsion breaking oil adsorption tank 30 is not necessarily limited to one set, and may be two sets, three sets, or more. In that case, a plurality of emulsion breaking oil adsorption tanks 30 may be arranged in series with emphasis on the cleanliness of the fresh water discharged continuously to the set of oil separation tanks 10, or discharged after the set of oil separation tanks 10. It is also conceivable to arrange a plurality of emulsion breaking oil adsorption tanks 30 in parallel so that the amount of fresh water to be treated can be accommodated.
[0028]
Here, the structure of the oil separation tank 10 is divided by a partition wall 11d to form two chambers, an oil separation chamber 11x and a water storage chamber 11y. A certain amount of drain water passes between the tip of the partition wall 11d and the bottom of the oil separation tank body 11, and can freely enter and exit between the oil separation chamber 11x and the water storage chamber 11y. The oil separation tank 10 is not specifically shown in the upper part of the oil separation tank body 11, but the oil separation chamber 11x and the water storage chamber 11y are formed through holes formed in the upper part of the drain scattering prevention plate 11a. Both rooms are open to the atmosphere at the top.
[0029]
Further, in the oil separation chamber 11x, the oil absorbing material 11s is filled from the lower part to a height of about 0.6 with respect to the height of the entire oil separation tank 10. Here, as the oil absorbing material 11s, a material made of polypropylene or polystyrene fiber can be considered. However, the present invention is not limited to these, and other materials may be used as long as they have an oil adsorption function and are insoluble in water.
[0030]
In the oil separation chamber 11x, the inflow pipe 11b arranged from the upper part to the height of the substantially central part is connected to the collecting pipe 262 at one upper end and the drain end with the other pipe end as the inlet. Water is flowing in. Therefore, in the oil separation chamber 11x, the oil-absorbing material 11s separates foreign matter centered on oil.
[0031]
On the other hand, in the water storage chamber 11y, one end of the discharge pipe 11c is positioned on the liquid level WL located at a height of about 0.4 from the bottom, and the lower portion between the oil separation chamber 11x and the water storage chamber 11y. The drain water from which foreign matters centered on oil have been removed flows from the communicating portion between the tip of the partition wall 11d and the bottom of the oil separation tank body 11. However, the emulsified oil was dissolved in the drain water, and it flowed as it was without being separated by such a method.
[0032]
It should be noted that the oil absorbing material 11s having a height of about 0.6 from the bottom, the pipe end of the inflow pipe 11b located at the center from the top, and the height of about 0.4 from the bottom. The pipe end of the discharge pipe 11 c and the drain scattering prevention plate 11 a are all considered in order to prevent the drain water from scattering from the oil separation tank 10.
[0033]
Here, the other pipe end of the discharge pipe 11c is connected to the connection pipe 271 at the lower part. Accordingly, the relatively clean drain water from which oil is removed located above the one end of the pipe located at the liquid level WL of the discharge pipe 11c gathered at the liquid level of the water storage chamber 11y is removed from the discharge pipe 11c. It enters from one pipe end and is fed into the connecting pipe 271 from the other pipe end.
[0034]
Also, the oil separation chamber 10 as an oil separation tank body 11, in the case of using a transparent material such as made of glass or plastic, the drain water in the oil separation chamber 11x just after flowing into the oil separation chamber 11x dirt It is easy to confirm the situation by visual observation or optical means, and it can serve as a contamination degree confirmation means.
[0035]
In addition, as a positional relationship at the height of the oil separation tank 10 and the emulsion breaking oil adsorption tank 30 located downstream thereof, the oil separation tank 10 is always located higher than the emulsion breaking oil adsorption tank 30. The minute water head H of 5 to 100 cm is secured between one end of the discharge pipe 11c located on the liquid level WL and the highest position of the fresh water pipe 281. That is, the drain water stored in the water storage chamber 11y of the oil separation tank 10 is drained as fresh water from the fresh water pipe 281 via the emulsion breaking oil adsorption tank 30 without using any power by the head H. You can do that.
[0036]
Therefore, although not specifically illustrated, it is conceivable to place the oil separation tank 10 directly on the upper part of the emulsion breaking oil adsorption tank 30 or to place it through a support column.
[0037]
In this case, the positional relationship between the height of the oil separation tank 10 and the emulsion breaking oil adsorption tank 30 will be described in a little more detail. The discharge pipe 11c formed in the oil separation tank body 11 is connected to the lower part of the oil separation tank 10. The connecting pipe 271 is connected so that drain water is fed from an inflow port 31 a formed in the lower part of the emulsion breaking oil adsorption tank 30.
And drain water rises toward the upper part from the lower part of the emulsion breaking oil adsorption tank 30, and is discharged | emitted from the fresh water pipe | tube 281 connected to the outflow port 31b formed in the upper part of the emulsion breaking oil adsorption tank 30. It has become.
[0038]
However, in the emulsion breaking oil adsorption tank 30, it is conceivable that the connecting pipe 271 is connected to the upper part and the fresh water pipe 281 is connected to the lower part to discharge the fresh water, but it is considered that the drain water passes uniformly. It is desirable that the drain water rises from the lower part to the upper part.
[0039]
Heretofore, an example in which the drain water flow in the emulsion breaking oil adsorption tank 30 flows from the lower part and is discharged from the upper part, and an example in which it flows from the upper part and discharged from the lower part have been described. On the other hand, although not specifically illustrated, the flow of the drain water in the emulsion breaking oil adsorption tank 30 is lowered by a pipe accommodated in the emulsion breaking oil adsorption tank 30 with its ends positioned vertically. An example of flowing from the bottom and discharging from the lower part and an example of flowing from the upper part and discharging from the upper part can be considered.
[0040]
In this case, as an example, the drain water flowing in from the lower inlet is first sent to the upper part through a pipe connected to the inlet and then subjected to emulsion breaking and oil adsorption from the upper part to the lower part. It is made to reach and is discharged from the lower outlet. In addition, drain water flowing in from the lower inlet is first subjected to emulsion breakage and oil adsorption to reach the upper part, and then sent to the lower part through a pipe connected to the lower outlet and connected to the lower part. It is also possible to discharge from the outlet. The same thing can be considered when flowing in from the top and discharging from the top.
[0041]
By performing such a process, the liquid level WL of the oil separation tank 10 and the drain water above the liquid level WL are lowered while being drained, and then the emulsion breaking oil adsorbing tank 30 and the fresh water pipe 281 The emulsion breaking oil adsorbing tank 30 is configured by securing the head H between the position where the drain water is raised at the highest point of the water, particularly by securing the head H between the drain water 281 and the fresh water pipe 281. It can be said that the drain water has come to pass through the layers of the adsorbent 32 with emulsion breaking particles and the oil adsorbent 33 evenly, not to a specific portion.
[0042]
Next, in the closed emulsion breaking oil adsorption tank 30, the first layer on the inlet side contains an oil adsorbent 33 that adsorbs oil, and the second layer on the inlet side contains a dye or the like. Activated carbon 34 that removes off-flavors is accommodated, and an oil adsorbent 33 that adsorbs oil is accommodated in the third layer on the inlet side. In this case, by sealing the emulsion breaking oil adsorption tank 30, there is no fear that drain water passing through the emulsion breaking oil adsorption tank 30 overflows outside, and only fresh water is discharged from the fresh water pipe 281. The previous deterioration of the surrounding environment has been completely eliminated.
[0043]
However, it is possible that there is no layer of the third oil adsorbent 33 on the inlet side, and there is no difference in the number of the first oil adsorbent 33 on the inlet side depending on whether or not there is a layer of the third oil adsorbent 33 on the inlet side. The case where there is no layer of the first oil adsorbent 33, the case where there is no layer of the first oil adsorbent 33 and the second activated carbon 34 on the inlet side, and the first oil adsorber on the inlet side Various measures are conceivable, for example, when there is no material 33 layer and the second activated carbon 34 layer is located substantially in the center.
[0044]
In this case, in the emulsion breaking oil adsorbing tank 30, as shown in FIG. 2, the adsorbent with emulsion breaking particles in which emulsion breaking particles are adhered from the fourth layer following the third layer on the inlet side. 32 and the oil adsorbent 33 that adsorbs oil are housed in an alternately stacked state. Here, the number of layers is nine in FIG. 2, but it may be more or less. However, the final layer is desirably a layer of the oil adsorbent 33.
[0045]
In FIG. 2, the size of each layer is made uniform, but it is conceivable to change the width. In particular, the activated carbon 34 is desirably 15 to 60% of the entire weight ratio. Therefore, it is not necessary to limit the layer of activated carbon 34 to one layer. Here, when the ratio of the activated carbon 34 is 15% or less, it is insufficient for removing general pigments and off-flavors, and when it is 60% or more, the ability to a general emulsified oil decreases.
[0046]
Moreover, the emulsion breaking oil adsorption tank main body 31 of the emulsion breaking oil adsorption tank 30 can use a transparent material such as glass or plastic that can visually check the internal situation from the outside, or can visually check the internal situation from the outside. It is also conceivable to insert a transparent material such as glass or plastic.
[0047]
On the other hand, the adsorbent 32 with emulsion breaking particles releases the oil-water bond by emulsion breaking the drain 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 adsorbed by the adsorbent or oil adsorbent 33 constituting the adsorbent 32 with emulsion breaking particles.
[0048]
Here, as the structure of the emulsion breaking oil adsorption tank main body 31, the drain water which is liquid flows into the emulsion breaking oil adsorption tank main body 31 from the inlet 31a and is discharged from the outlet 31b. Space portions 31z are secured on the inlet side and the outlet side which are both ends of the emulsion breaking oil adsorption tank main body 31 so as to flow uniformly in the tank main body 31.
[0049]
Accordingly, in order to secure the space portion 31z at both ends, two porous plates 31c having a large number of small holes are prepared, and the porous plate 31c and the end portions at both ends of the emulsion breaking oil adsorption tank main body 31 are prepared. The porous plate 31c is supported by disposing a cylindrical column 31d having a diameter smaller than that of the emulsion breaking oil adsorbing tank main body 31 therebetween, and the adsorbent 32 with emulsion breaking particles, the oil adsorbing material 33, and the activated carbon 34 are used as two porous plates. It is made to accommodate between 31c.
[0050]
However, the column 31d need not be limited to a cylindrical one, and may have any content such as arranging one to several columns or prisms as long as the space 31z can be secured. As the perforated plate 31c, a punching plate having a large number of small holes or a ceramic resin can be considered. Moreover, the space part 31z of both ends is not necessarily limited to such a structure, and instead of the perforated plate 31c support column 31d, a substantially hemispherical wire mesh is arranged to secure the space part 31z. Conceivable.
[0051]
Here, as a method of making the adsorbent 32 with emulsion breaking particles in which emulsion breaking particles are adhered to the adsorbent, a solution in which emulsion breaking particles such as amine and barium sulfate are dissolved in a solvent is adhered to the adsorbent. A method of evaporating and drying the solvent later is common, but there is also a method of spraying the solution onto the oil adsorbent 33 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 instead of being dissolved.
[0052]
In this case, the emulsion breaking particles and the adsorbing material may be packed so as to be dispersed in a dispersed state between the adsorbing materials without being in the state of the adsorbent 32 with emulsion breaking particles. Also in this case, the activated carbon 34 may be disposed in the vicinity of the inflow port 31 a or the substantially central portion of the emulsion breaking oil adsorption tank 30.
[0053]
However, in any of the cases described above, a configuration in which the activated carbon 34 is not disposed is also conceivable.
[0054]
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.
[0055]
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. Are primary amines (eg stearylamine) and derivatives thereof.
[0056]
Examples of these amine compounds include primary amines such as hexylamine, hebutylamine, octylamine, nonylamine, decylamine, laurylamine, myristylamine, palmitylamine, oleylamine, stearylamine, or hydrocarbon chains thereof. Secondary amines such as diamines and triamines, and tertiary amines, or their picrads, various salts (for example, salts of hydrochloric acid, sulfuric acid, phosphoric acid, carbonic acid, acetic acid, etc.), and these hydrocarbon chains Primary amines, secondary amine acid amides, amidines, ureas, thioureas, and primary amine Schiff bases.
[0057]
As the amide, sulfonamides such as p-toluenesulfonyl-N-stearylamide and N-stearylacetamide are preferable. Moreover, the quaternary ammonium salt, betaine, etc. which have these hydrocarbon chains are mentioned. Furthermore, for example, polyvalent amines such as stearyl propylene diamine and semi-cured beef tallow diamine can be used. Furthermore, it is also possible to use a mixture of amines having hydrocarbon chains having different carbon numbers such as hardened beef tallow amine and coconut amine.
[0058]
Further, as the adsorbent used for the oil adsorbent 33 and the adsorbent 32 with emulsion breaking particles, one made of polypropylene or polystyrene fibers can be considered. However, the adsorbents used for the oil adsorbent 33 and the adsorbent 32 with emulsion breaking particles are not limited to these, and may be any one that has an oil adsorption function and is water-insoluble. Other things can be used.
[0059]
Here, the size of the adsorbent used for the oil adsorbent 33 and the adsorbent 32 with emulsion breaking particles is preferably (10 mm to 200 mm) × (2 mm to 50 mm), more preferably. Is a size of (30 mm to 80 mm) × (5 mm to 40 mm). In particular, it is most preferable to prepare two types of sizes of (35 mm to 55 mm) × (25 mm to 40 mm) and (40 mm to 60 mm) × (3 mm 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 of 4 to 8 times in area.
[0060]
In this case, the reason why such a size is preferable is that when the adsorbent used for the oil adsorbent 33 and the adsorbent 32 with emulsion breaking particles is filled in the emulsion breaking oil adsorption tank main body 31, it is too large. Since it is difficult to fill a large amount due to the large gap, it becomes difficult to obtain a large surface area, and there are many parts that are forcedly compressed, but such parts are destroyed by the emulsion oil Adsorption function decreases, performance cannot be ensured because the amount to be filled is small, and if it is too small, the gap is basically small, so the emulsion oil is destroyed and the adsorption function is reduced It is difficult to cut, and it is troublesome to perform various management.
[0061]
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 large thing to the early decline in function, which is a problem of making it small at the same time.
[0062]
As for the two kinds of small pieces, it is best to use two kinds of small pieces for both the adsorbent used for the oil adsorbent 33 and the adsorbent 32 with emulsion breaking particles. A small piece and a large piece may be used for the adsorbent used for the adsorbent 32 with emulsion breaking particles, or vice versa.
[0063]
The drain water treatment apparatus for drain water generated from compressed air according to the present invention is configured as described above, and its operation will be described below.
[0064]
First, when the motor composing the air compressor 110 is operated, the rotation of the motor is transmitted to the compressor by a belt to generate compressed air. Here, the produced compressed air passes through the compressed air pipe 201, the aftercooler 120, the compressed air pipe 202, the air tank 130, the compressed air pipe 203, the dryer 140, the compressed air pipe 204, the filter 150, and the compressed air pipe 205. Thus, it is possible to send dry compressed air to the actuator at the tip as needed.
[0065]
On the other hand, drain water generated from the compressed air by the aftercooler 120, the air tank 130, the dryer 140, and the filter 150 together with the compressed air, drain discharge pipes 211a, 212a, 213a, 214a, valves 221, 231, 241, 251 and drain discharge. Pipes 211b, 212b, 213b, 214b, drain traps 222, 232, 242, 252 and drain discharge pipes 211c, 212c, 213c, 214c, check valves 223, 233, 243, 253 and drain discharge pipes 211d, 212d, 213d, The drain discharge pipe 212d is positioned at the uppermost stream via 214d and merged in the collecting pipe 261, and further sent to the drain water treatment device 1 via the check valve 265 and collecting pipe 262, and the oil separation tank 10 and an emulsion breaking oil adsorption tank 30 Place the various foreign matters is removed containing 1, oil, so that it is possible to Shimizu tube 281 rivers Shimizu also clean as there is no problem with directly discharged from.
[0066]
In this case, in the drain water treatment device 1, the drain water first fed into the oil separation tank 10 via the inflow pipe 11b adheres foreign matter mainly oil to the oil absorbing material 11s in the oil separation chamber 11x. And a relatively clean drain from which oil and various foreign substances are removed through the space between the tip of the partition wall 11d formed between the oil separation chamber 11x and the water storage chamber 11y and the bottom of the oil separation tank body 11. Water is sent into the water storage chamber 11y. However, it is dissolved in this drain water and mixed with emulsified oil.
[0067]
On the other hand, the compressed air sent into the oil separation tank 10 together with the drain water is released and released into the atmosphere through a hole in the upper part of the drain scattering prevention plate 11a formed in the oil separation tank main body 11.
[0068]
If a transparent material made of glass or plastic is used as the oil separation tank main body 11, the dirty drain water immediately after being fed into the oil separation tank 10 can be visually confirmed.
[0069]
Here, the drain water sent into the water storage chamber 11y is one end portion of the discharge pipe 11c formed in the water storage chamber 11y, and the amount accumulated at the upper part from the pipe end located at the liquid level WL. After flowing in from the inlet 31a formed in the lower part of the emulsion breaking oil adsorption tank main body 31 via the discharge pipe 11c and the connecting pipe 271, it rises toward the upper part and enters the upper part of the emulsion breaking oil adsorption tank main body 31. It discharges from the formed outlet 31b, passes through the fresh water pipe 281 and is discharged as fresh water.
[0070]
In this case, the oil separation tank 10 is always located higher than the emulsion breaking oil adsorption tank 30, and a water head H of 5 to 100 cm is secured between the liquid level WL and the highest position of the fresh water pipe 281. Yes.
[0071]
The drain water that has flowed into the oil separation tank 10 flows into the water storage chamber 11y while being adsorbed to the oil absorbing material 11s in the oil separation chamber 11x of the oil separation tank 10, and from the water storage chamber 11y to the oil separation tank main body. 11 to the emulsion breaking oil adsorption tank 30 from the inlet 31a formed in the lower part of the emulsion breaking oil adsorption tank main body 31 constituting the emulsion breaking oil adsorption tank 30 via the connection pipe 271 from the discharge pipe 11C formed in FIG. Furthermore, it is discharged as fresh water through the fresh water pipe 281 from the outlet 31b formed in the upper part of the emulsion breaking oil adsorbing tank main body 31, but it is treated by the force of the water head H until it is discharged as this fresh water. -ing
[0072]
However, in the oil separation chamber 11x of the oil separation tank 10, the oil absorbing material 11s separates various foreign substances that are oil and solid matter, but the emulsified oil remains dissolved in the drain water. It is often sent to the emulsion breaking oil adsorption tank 30.
[0073]
Here, the drain water that has flowed into the emulsion breaking oil adsorption tank 30 uniformly flows in all directions from the space portion 31z, and in the first layer on the inlet side, it can be separated in the oil separation tank 10 by the adsorbent 32. In the second layer on the inlet side, the activated carbon 34 is used to remove oils such as pigments, odors, and other oils other than the oil that has been emulsified. In the third layer, the activated carbon 34 removes pigments and off-flavors, and at the same time adsorbs the oil that has caused emulsion breakage. In the emulsion breakant oil adsorption tank 30, the fourth on the inlet side as shown in FIG. By storing the adsorbent 32 with emulsion breaking particles to which the emulsion breaking particles are adhered and the oil adsorbing material 33 that adsorbs oil alternately in layers, the emulsion It is has become to be able to drain water to the fresh water in the repeating emissions destruction and oil adsorption.
[0074]
In addition, by passing through the adsorbent 32 with emulsion breaking particles and the oil adsorbent 33, the adsorbent 32 with emulsion breaking particles breaks the emulsion by releasing the bond between water and oil in the emulsified oil and further separated. Since the oil is adsorbed and the oil adsorbent 33 adsorbs the oil that could not be adsorbed by the adsorbent 32 with emulsion breaking particles, and the process is repeated many times, the cleanliness of the drain water is improved. is there.
[0075]
Further, the present invention does not contain the materials corresponding to the adsorbent 32 with emulsion breaking particles and the oil adsorbent 33 in separate tanks. Moreover, the thing which only laminated | stacked and accommodated multiple sets corresponding to the adsorbent 32 with an emulsion breaking particle | grains and the oil adsorbent 33 alternately removes the dirt which cannot be understood by adding the layer of activated carbon 34 at least one layer. Furthermore, the point that the pressure of the head H is always loaded is also different.
[0076]
As an example, concretely, how much is filled is shown as a cylinder with an inner diameter of approximately 200 mm and a height of 950 mm with respect to a drain generated from a screw type air compressor of 55 Kw to 110 Kw. A polypropylene non-woven fabric 45 mm × 25 mm adsorbent 32 with an emulsion breaking particle and a polypropylene non-woven fabric 45 mm × 5 mm oil adsorbent 33 are filled with 2.5 kg each, and activated carbon 34 is filled with 1 kg. The emulsion breaking oil adsorption tank 30 is used. However, depending on the situation of the drain water, the activated carbon 34 may be increased to 1 to 6 kg, and in that case, a certain effect can be seen.
[0077]
Here, when a transparent material made of glass or plastic is used as the emulsion breaking oil adsorption tank main body 31, dirt on the adsorbent 32 with emulsion breaking particles and the oil adsorption material 33 used in the emulsion breaking oil adsorption tank 30 are removed. It is possible to visually check the state, and it is possible to determine an accurate replacement time.
[0078]
Finally, the fresh water discharged from the emulsion breaking oil adsorption tank 30 is treated so cleanly that it can be discarded as it is into the river.
[0079]
【The invention's effect】
As is clear from the above description, the present invention can provide the following effects.
[0080]
First, activated carbon that removes at least one layer of pigment and off-flavor was stored in a state where the adsorbent with emulsion-breaking particles and the oil-adsorbing material that adsorbs oil were alternately laminated. As a result, it has become possible to deal with the removal of unexpected foreign substances other than oil and emulsified oil at the same time as processing the emulsified oil.
[0081]
Secondly, by storing the adsorbent with emulsion breaking particles having a large flow resistance in a stacked state, it is less likely that drain water flows only in a specific flow path, and the adsorbent with emulsion breaking particles. And the durability of the oil adsorbent has been greatly improved.
[0082]
Third, by providing spaces at the inlet and outlet of the emulsion breaking oil adsorption tank, it is less likely that drain water flows only through specific flow paths, and the adsorbent with emulsion breaking particles and the oil adsorbent. Dramatically improved durability.
[0083]
Fourth, an oil separation tank that separates the oil by adsorption is arranged upstream of the emulsion breaking oil adsorption tank, and the water head is discharged so that fresh water can be discharged from the fresh water pipe connected to the outlet of the emulsion breaking oil adsorption tank. By securing, a simple device that does not particularly require power or the like has become possible.
[0084]
Fifth, it is more powerful by passing through the adsorbent with emulsion breaking particles and the oil adsorbent multiple times to break up the emulsion that drains the combination of drained water and oil emulsified by combining fine oil with water. Can be done.
[0085]
Sixth, by using amine or barium sulfate as emulsion breaking particles, emulsion breaking has been dramatically advanced.
[0086]
Seventh, by making the emulsion breaking oil adsorption tank a sealed structure, it has become possible to reliably prevent surrounding dirt.
[Brief description of the drawings]
FIG. 1 is an overall view of an embodiment showing the present invention. FIG. 2 is a detailed view of an emulsion breaking oil adsorption tank constituting a drain water treatment apparatus of the present invention.
1. Drain water treatment device 10. Oil separation tank 11. Oil separation tank body 11a ... Drain scattering prevention plate 11b ... Inflow Pipe 11c ... Discharge pipe 11d ... Partition 11s ... Oil absorbing material 11x ... Oil separation chamber 11y ... Water storage chamber 30 ... Emulsion Breaking oil adsorption tank 31 ... Emulsion breaking oil adsorption tank body 31a ... Inlet 31b ... Outlet 31c ... Perforated plate 31d ... Post 31z ··· Space part 32 ··· Adsorbent with emulsion breaking particles 33 ··· Oil adsorbent 34 ··· Activated carbon 110 · · · Air compressor 120 ···・ Aftercooler 130 ... Air tank 140 ... Dryer 150 ... Filter 201 Compressed air piping 202 Compressed air piping 203 Compressed air piping 204 Compressed air piping 205 Compressed air piping 211 a Drain discharge pipe 211b ... Drain discharge pipe 211c ... Drain discharge pipe 211d ... Drain discharge pipe 212a ... Drain discharge pipe 212b ... Drain discharge pipe 212c ... Drain Drain pipe 212d ... Drain discharge pipe 213a ... Drain discharge pipe 213b ... Drain discharge pipe 213c ... Drain discharge pipe 213d ... Drain discharge pipe 214a ... Drain discharge pipe 214b ... Drain discharge pipe 214c ... Drain discharge pipe 214d ... Drain discharge pipe 221 ... Valve 222 ... Drain trap 223 ... Check 231 ... Valve 232 ... Drain trap 233 ... Check valve 241 ... Valve 242 ... Drain trap 243 ... Check valve 251 ... Valve 252 ... Drain trap 253 ... Check valve 261 ... Collecting pipe 262 ... Collecting pipe 265 ... Check valve 271 ... ... Connection pipe 281 ... Clear water pipe H ... Water head WL ... Liquid level

Claims (4)

An oil separation chamber (11x) filled with an oil-absorbing material (11s) having a function of separating oil and solid foreign substances along the drain water flow and a relatively clean drain. An oil separation tank (10) in which two chambers of a water storage chamber (11y) in which water flows is formed, drain water can enter and exit at the lower part and the upper part is opened, and the water storage chamber (11y) A connection pipe (271) for sending drain water above the liquid level (WL), an adsorbent with emulsion breakage particles (32) to which emulsion breakage particles are attached, an oil adsorbent (33) and a dye for adsorbing oil And an activated emulsion breaking oil adsorption tank (30) containing activated carbon (34) for removing odors and unpleasant odors, and a fresh water pipe (281) for sending fresh water treated in the emulsion breaking oil adsorption tank (30) And the liquid level (WL) The drain water above the liquid level (WL) is lowered while being drained, and then the drain water is raised to the highest point of any one of the emulsion breaking oil adsorption tank (30) and the fresh water pipe (281). A drain water treatment apparatus for drain water generated from compressed air, characterized in that a water head (H) is secured between the position and the position of the water to be drained.   The connecting pipe (271) is connected to an inlet (31a) formed at the lower part of the emulsion breaking oil adsorption tank (30), and the fresh water pipe (281) is formed at the upper part of the emulsion breaking oil adsorption tank (30). The drain water treatment apparatus for drain water generated from compressed air according to claim 1, wherein the drain water treatment apparatus is connected to the outlet (31 b). In the emulsion breaking oil adsorption tank (30), the adsorbent with emulsion breaking particles (32) and the oil adsorbent (33) are alternately stacked in the order described to store at least one layer of the activated carbon (34). 3. A drain water treatment apparatus for drain water generated from compressed air according to claim 1 or 2 . An emulsion breaking oil adsorption tank main body (31) constituting the emulsion breaking oil adsorption tank (30) and an oil separation tank main body (11) constituting the oil separation tank (10) are connected from the outside to the inside. The drain water treatment apparatus for drain water generated from compressed air according to any one of claims 1 to 3 , wherein the situation is visible.

Images