JP4025835B2 - Oil-water separation method and oil-water separation device for drain water generated from compressed air - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method and an apparatus for separating water from drain water generated from compressed air. More specifically, the present invention relates to drain water generated from a plurality of devices that generate drain water from compressed air. The present invention relates to a technology for discharging with one electric drain trap.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a technique related to an oil-water separation method and an oil-water separation device for drain water generated from compressed air has been found in FIG.
[0003]
In this case, the compressed air produced by the air compressor 10 is sent from the compressed air piping 101, 102, 103, 104, 105, 106 in the middle of the air tank 20, the dust removal filter 30, the dryer 40, Drain water is generated while passing through the filter 50 and the mist filter 60, and the generated drain water is drain discharge pipes 21 a, 21 x, 21 y connected to other devices 10, 20 and devices 30, 40, 50, 60, 21c, 31a, 31x, 31y, 31c, 41a, 41x, 41y, 41c, 51a, 51x, 51y, 51c, 61a, 61x, 61y, 61c are discharged.
[0004]
Further, drain drain pipes 21a, 21x, 21y, 21c, 31a, 31x, 31y, 31c, 41a, 41x, 41y, 41c, 51a, 51x, 51y, 51c, 61a, 61x, 61y, 61c On-off valves 22, 32, 42, 52, 62 that can manually open and close the conduit, drain traps 29, 39, 49, 59, 69 that can electrically open and close the conduit, and prevent backflow from downstream to upstream Check valves 23, 33, 43, 53, 63 are provided.
[0005]
Also, the drain discharge pipes 21a, 21x, 21y, 21c, 31a, 31x, 31y, 31c, 41a, 41x, 41y, 41c, 51a, 51x, 51y, 51c, 61a, 61x, 51y, 61c are all drain collecting pipes. 150, after drain water is sent to the drain water treatment device 70 via the on-off valve 156 and the drain collecting pipe 154, and after the drain water is treated to clean water by the drain water treatment device 70, the fresh water pipe 71 It is designed to be discharged as fresh water.
[0006]
[Problems to be solved by the invention]
However, the conventional oil-water separation method and apparatus for separating water generated from compressed air have the following problems.
[0007]
First, each drain trap is provided in the middle of a drain discharge pipe connected to another device or device that generates drain water from compressed air. This is the same as the number of devices that generate water, so that some of the equipment such as piping becomes complicated, and it is necessary to consider the control of a plurality of drain traps, which is expensive.
[0008]
Secondly, it is recommended that the compressed air produced by the air compressor be used in a variety of pneumatic equipment after it has been dried and clean. Naturally, it was necessary to install drain discharge pipes and drain collecting pipes and related equipment, and the preparation and assembly of the filters required enormous effort and cost.
The present invention aims to solve such problems.
[0009]
[Means for Solving the Problems]
The present invention relates to a plurality of devices 40, 50, 60 through which compressed air passes. Only from The drain water generated from the compressed air is merged so as not to flow back to the respective devices 40, 50, 60, and the drain water is discharged for a predetermined time at the position after the merge, and the drain water treatment device 70 is discharged. In addition, the drain water generated from the compressed air in one or a plurality of other devices 20 and 30 through which the compressed air passes is discharged for a predetermined time for each of the other devices 20 and 30. The drain water treatment device 70 is fed so as not to flow backward, and the drain water is discharged from the plurality of devices 40, 50, 60 at a position after the whole has always joined in a predetermined cycle. By confirming the presence or absence of drain water and performing only when drain water is present, the above problem has been solved.
[0010]
Also, a plurality of devices 40, 50, 60 Only from The drain discharge pipes 41a, 41b, 41c, 51a, 51b, 51c, 61a, 61b, 61c are connected to the plurality of devices 40, 50, 60 so that the drain water generated from the compressed air can be discharged. Drain discharge pipes 41a, 41b, 41c, 51a, 51b, 51c, 61a, 61b, 61c are provided with check valves 43, 53, 63, respectively, in the middle of the drain discharge pipes 41a, 41b, 41c, 51a, 51b, 51c, 61a, 61b, 61c are all connected to the drain collecting pipe 151, and the drain water accumulated in the drain collecting pipe 151 is discharged to the drain collecting pipe 151 at the position of the drain collecting pipe 151. An electric drain trap 157 to be fed is provided, and the other device 20 is configured so that the drain water generated from the compressed air by the other devices 20 and 30 can be discharged. 30 are connected to the drain discharge pipes 21a, 21x, 21y, 21c, 31a, 31x, 31y, 31c, respectively, and are located in the middle of the drain discharge pipes 21a, 21x, 21y, 21c, 31a, 31x, 31y, 31c. Electric drain traps 29 and 39 and check valves 23 and 33 are provided, respectively, and the drain discharge pipes 21a, 21x, 21y, 21c, 31a, 31x, 31y, and 31c are connected to the drain trap 157, respectively. Said The drain water treatment device 70 is connected between the drain water treatment devices 70. Further, a pressure gauge 155 for measuring the pressure of the drain water flowing through the drain collecting pipe 151 is disposed at any position of the drain collecting pipe 151. Further, the plurality of devices 40, 50, 60 are a dryer 40 and a single or a plurality of filters 50, 60, and the dryer 40, a single or a plurality of the filters. Compressed air pipes 103, 104, 105, 106 disposed before and after 50, 60, the drain discharge pipes 41a, 41b, 41c, 51a, 51b, 51c, 61a, 61b, 61c, and the drain collecting pipe 151, the check valves 43, 53, and 63, and the pressure gauge 155 are integrally formed. It was persists.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
An oil-water separation method and an oil-water separation device 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 the present invention.
[0012]
As shown in FIG. 1, reference numeral 10 denotes 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. Is producing.
[0013]
Here, the compressed air produced by the air compressor 10 is compressed air piping 101, air tank 20, compressed air piping 102, dust filter 30, compressed air piping 103, dryer 40, and compressed air piping 104. Although not specifically shown, the pre-filter 50, the compressed air pipe 105, the mist filter 60, and the compressed air pipe 106 are used for various types of air that constitute an actuator such as an air motor or an air cylinder. The pressure device can be supplied with dry and clean compressed air.
[0014]
However, the dust removal filter 30 may not be provided, and either the pre-filter 50 or the mist filter 60 as the filters 50 and 60 may be provided. Additional filters may be added.
[0015]
In this case, in the apparatus shown in FIG. 1, the compressed air is dried by the dryer 40, and various foreign matters such as oil and solids are removed by the dust removing filter 30, the pre-filter 50, and the mist filter 60. Dry, clean compressed air can be supplied to various pneumatic equipment.
[0016]
On the other hand, from the lower part of the air tank 20, which is another device 20 that stores compressed air, a drain discharge pipe 21a, an openable / closable valve 22 and a drain discharge pipe 21x can be electrically opened and closed. The drain trap 29, the drain discharge pipe 21y, the check valve 23 for preventing the reverse flow from the downstream to the upstream, and the drain discharge pipe 21c are connected to the drain collecting pipe 161.
[0017]
Further, from the dust removal filter 30 as another device 30, a drain discharge pipe 31a, an openable / closable valve 32, a drain discharge pipe 31x, a drain trap 39 that can be electrically opened and closed, and a drain discharge pipe 31y. Are connected to the drain collecting pipe 161 via the check valve 33 for preventing the reverse flow from the downstream to the upstream and the drain discharge pipe 31c.
[0018]
Further, from the dryer 40 as the device 40, a drain discharge pipe 41a, an openable / closable valve 42, a drain discharge pipe 41b, a check valve 43 for preventing a reverse flow from downstream to upstream, and a drain discharge pipe It is connected to the drain collecting pipe 151 via 41c.
[0019]
In addition, from the pre-filter 50 that is the device 50, a drain discharge pipe 51a, an openable / closable valve 52, a drain discharge pipe 51b, a check valve 53 that prevents backflow from downstream to upstream, It is connected to the drain collecting pipe 151 via the discharge pipe 51c.
[0020]
In addition, from the mist filter 60 that is the device 60, a drain discharge pipe 61a, an openable / closable valve 62, a drain discharge pipe 61b, and a check valve 63 that prevents backflow from downstream to upstream, It is connected to the drain collecting pipe 151 via the drain discharge pipe 61c.
[0021]
Here, from the drain collecting pipe 151, an electric drain trap 157 that opens and closes by the operation of the motor and magnetic force, a drain collecting pipe 152, a drain collecting pipe 153, an on-off valve 156, and a drain collecting pipe 154 are provided. Then, fresh water is discharged from the fresh water pipe 71 via a drain water treatment device 70 that separates oil and various foreign substances. In this case, the fresh water discharged from the fresh water pipe 71 is clean enough to be discharged into the river or the like as it is.
[0022]
It should be noted that the drain water discharge in the drain trap 157 is always performed in a predetermined cycle for a predetermined time, or as another method, the drain discharge pipes 41a, 41b, 41c, 51a, It is conceivable that the presence or absence of drain water is confirmed at a position after all of 51b, 51c, 61a, 61b, 61c have joined, and it is performed for a predetermined time only when drain water is present.
[0023]
On the other hand, a pressure gauge 155 is installed at any position of the drain collecting pipe 151.
Here, the purpose of installing the pressure gauge 155 is to measure the pressure of the fluid flowing through the drain collecting pipe 151, thereby confirming the abnormality of each device 40, 50, 60, or from each device 40, 50, 60. The drain trap 157 is installed to check whether or not the processing capacity of the drain trap 157 with respect to the total amount of drain water is appropriate. Here, instead of the pressure gauge 155, a differential pressure gauge that measures the differential pressure between the compressed air pipes 101, 102, 103, 104, 105, 106 and the drain collecting pipe 151 may be installed.
[0024]
Further, the drain collecting pipe 161 joins at the connecting portion of the drain collecting pipe 152 and the drain collecting pipe 153 downstream of the drain trap 157, and the drain collecting pipe 153, the on-off valve 156, the drain collecting pipe 154, oil, various kinds of Fresh water is discharged from the fresh water pipe 71 via a drain water treatment device 70 that separates foreign matter.
[0025]
Moreover, when using compressed air with various pneumatic equipment, the dry compressed air is normally requested | required. Therefore, in order to satisfy the requirement, a dryer 40, various fills, and tars 50 and 60 are inevitably required. On the other hand, when the devices 40, 50, 60 such as the dryer 40 and various filters 50, 60 are installed, the compressed air pipes 103, 104, 105, 106 (a part of them are removed in some cases) through which compressed air flows. ), Drain discharge pipes 41 a, 41 b, 41 c, 51 a, 51 b, 51 c, 61 a, 61 b, 61 c, and drain collecting pipes 151 (in some cases, a part of the drain collecting pipes 151). The drain valves 41a, 41b, 41c, 51a, 51b, 51c, 61a, 61b, 61c and the check valves 43, 53, 63 provided in the middle of the drain discharge pipes 41a, 41b, 41c, 51a, 51c, 61a, 61b, 61c. The pressure gauge 155 installed to measure the pressure of the fluid flowing through the drain collecting pipe 151 is integrally configured as an integrated dryer 200 in advance. It is very beneficial in the sense that save time in installing the dryer 40 and various filters 50, 60.
[0026]
In this case, the integrated type means devices 40, 50, 60, compressed air pipes 103, 104, 105, 106, drain discharge pipes 41a, 41b, 41c, 51a, 51b, 51c, 61a, 61b, 61c, and drain collecting pipes. 151, the open / close valves 42, 52, 62, the check valves 43, 53, 63 and the pressure gauge 155 are housed in one box or placed on one stand so as to be movable as a whole. It means that. In this case, it is conceivable that the drain trap 157 is added to form an integral structure.
[0027]
Further, the drain water treatment device 70 is not specifically shown, but an oil separation tank that separates oil and foreign substances by a specific gravity difference, and drain water that is emulsified by combining minute oil with water is subjected to emulsion breakage. It is composed of an emulsion breaking oil adsorption tank that releases the bond between oil and water and then adsorbs oil.
[0028]
In this case, the configurations of the oil separation tank and the emulsion breaking oil adsorption tank do not need to be limited to only one set, and may be two sets, three sets, or more. Then, focusing on the cleanness of the fresh water finally discharged, one set or a plurality of sets of emulsion breaking oil adsorption tanks arranged in series may be prepared following a set of oil separation tanks. In addition, one set or multiple sets of emulsion break oil adsorbing tanks arranged in parallel must be prepared in succession to a set of oil separation tanks so that the final amount of fresh water discharged can be processed. Is also possible.
[0029]
Next, the emulsion breaking oil adsorption tank is generally formed by laminating layers with various purposes, and the first layer on the inlet side contains an oil adsorbing material that adsorbs oil, and the inlet The second layer on the side contains activated carbon that removes pigments and off-flavors, and the third layer on the inlet side contains an oil adsorbent that adsorbs oil.
[0030]
Furthermore, in the emulsion breaking oil adsorption tank, the adsorbent with emulsion breaking particles to which the emulsion breaking particles are adhered from the fourth layer following the third layer on the inlet side, and the oil adsorbing material that adsorbs oil Are stored in an alternately stacked state. Here, the number of layers may be any number. However, the final layer is preferably an oil adsorbent layer.
[0031]
It is conceivable to change the thickness of each layer. In particular, regarding activated carbon, it is desirable to make it 15 to 60% of the whole by weight ratio. Therefore, it is not necessary to limit the activated carbon layer to a single layer. Here, if the ratio of the activated carbon is 15% or less, it is insufficient for removing general pigments and off-flavors, and if it is 60% or more, the ability to general emulsified oil is lowered.
[0032]
Furthermore, the body of the emulsion breaking oil adsorption tank is made of a transparent material such as glass or plastic that can visually check the internal conditions from the outside, or glass or plastic so that the internal conditions can be visually checked from the outside. It is also possible to insert a transparent material such as a product.
[0033]
On the other hand, the adsorbent with emulsion breaking particles releases the binding of oil and water by breaking the emulsion of drain water that is emulsified by the action of the emulsion breaking particles. It is adsorbed by the adsorbent and oil adsorbent constituting the adsorbent with emulsion breaking particles.
[0034]
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 oil adsorbent in a mist form. In addition, a method is also conceivable in which 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.
[0035]
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 in the vicinity of the inlet or in the substantially central portion of the emulsion breaking oil adsorption tank.
[0036]
However, in any of the above cases, a configuration in which activated carbon is not disposed at all is also conceivable.
[0037]
On the other hand, the amine used in the present invention may be an amine compound or a derivative thereof, and is preferably a solid when the amine compound or a derivative thereof is 25 ° C. However, it may be a compound that becomes a solid in a mixture with other compounds. That is, the compounds may be used alone or in combination of two or more.
[0038]
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.
[0039]
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.
[0040]
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.
[0041]
Further, as the adsorbent used for the oil adsorbent and the adsorbent with emulsion breaking particles, one made of polypropylene or polystyrene fibers can be considered. However, the adsorbents used for the oil adsorbent and the adsorbent with emulsion breaking particles are not limited to these, and other adsorbents that have an oil adsorbing function and are water-insoluble. It doesn't matter.
[0042]
The drain water treatment apparatus 70 is not necessarily limited to the above-described configuration, and is an oil separation tank that separates oil and foreign matters by a specific gravity difference, or drain water in which a minute oil is combined with water to be emulsified. The emulsion may be broken to release the bond between oil and water, and then the emulsion breaking oil adsorption tank for adsorbing the oil may be used alone. Further, chemicals and electrolysis alone can be considered.
[0043]
The method and apparatus for separating drain water generated from compressed air according to the present invention is configured as described above, and its operation will be described in detail below.
[0044]
First, when the motor constituting the air compressor 10 is operated, the rotation of the motor is transmitted to the compressor by a belt to generate compressed air. Here, the produced compressed air is compressed air piping 101, air tank 20, compressed air piping 102, dust removal filter 30, compressed air piping 103, dryer 40, compressed air piping 104, prefilter 50, and compressed air piping 105. Although not specifically shown through the mist filter 60 and the compressed air pipe 106, it is possible to send dry compressed air as needed to an actuator such as an air motor or an air cylinder at the tip. It can be done.
[0045]
On the other hand, the drain water generated from the compressed air in the air tank 20 or the dust removal filter 30 together with the compressed air, drain discharge pipes 21a, 31a, on-off valves 22, 32, drain discharge pipes 21x, 31x, drain traps 29, 39, and drain discharge. The pipes 21y and 31y, the check valves 23 and 33, and the drain discharge pipes 21c and 31c are joined together in the drain collecting pipe 161, and further, the drain collecting pipe 153, the on-off valve 156, and the drain collecting pipe 154 are drained. The drain water treatment device 70, which is sent to the water treatment device 70 and is composed of an oil separation tank and an emulsion breaking oil adsorption tank, removes various foreign matters including oil and can be discharged directly from the fresh water pipe 71 into the river. It has become possible to make clean water like no other.
[0046]
Further, the drain water generated from the compressed air by the dryer 40, the pre-filter 50 and the mist filter 60 together with the compressed air, the drain discharge pipes 41a, 51a, 61a, the on-off valves 42, 52, 62 and the drain discharge pipes 41b, 51b, 61b. And the check valves 43, 53, 63 and the drain discharge pipes 41c, 51c, 61c, and the drain collecting pipe 151 joins, and further, the drain trap 157, the drain collecting pipe 152, the drain collecting pipe 153, and the on-off valve 156 It is sent to the drain water treatment device 70 via the drain collecting pipe 154, and the drain water treatment device 70 composed of the oil separation tank and the emulsion breaking oil adsorption tank removes various foreign matters including oil, and from the fresh water pipe 71. It is possible to make clean fresh water that does not cause any problems even if it is discharged into the river as it is.
[0047]
Here, the drain water in the drain trap 157 is always discharged in a predetermined cycle for a predetermined time. Alternatively, the drain discharge pipes 41a, 41b, 41c, 51a are always in a predetermined cycle. , 51b, 51c, 61a, 61b, 61c, the presence or absence of drain water is confirmed at a position after all have joined, and it may be performed for a predetermined time only when drain water is present. The cycle and discharge time can be changed according to the situation.
[0048]
In this case, in the drain water treatment device 70, the drain water first fed to the oil separation tank is used to remove foreign matter centered on oil in the oil floating separation chamber constituting the oil separation tank and the specific gravity of the water. A relatively clean drain water from which oil and various foreign substances are removed through the space between the top of the partition wall formed between the oil floating separation chamber and the water storage chamber and the bottom of the oil separation tank body is removed by the difference. It is designed to be sent to the room. However, the oil is emulsified and mixed in the drain water.
[0049]
If a transparent material made of glass or plastic is used as the oil separation tank main body, it becomes possible to visually check the state of dirty drain water immediately after being fed into the oil separation tank.
[0050]
Here, the drain water fed into the water storage chamber of the oil separation tank is one end of a discharge pipe formed in the vertical direction of the water storage chamber and is accumulated above the end of the pipe located at the liquid level. After flowing from the discharge pipe through the other pipe through the inlet formed in the lower part of the emulsion breaking oil adsorption tank main body, it rises toward the upper part and enters the upper part of the emulsion breaking oil adsorption tank main body. It discharges | emits from the formed outflow port, and is discharged | emitted as fresh water through the fresh water pipe | tube 71. As shown in FIG.
[0051]
However, in the oil flotation chamber of the oil separation tank, oil and various foreign substances that are solids are separated, but the emulsion breaking oil adsorption tank remains in a state where the oil is dissolved in the emulsified drain water. Often sent to.
[0052]
Here, the drain water flowing into the emulsion breaking oil adsorption tank adsorbs oil that could not be separated in the oil separation tank by the adsorbent in the first layer on the inlet side, and the second layer on the inlet side. Then, activated carbon removes oils such as pigments and off-flavors and other oils that are emulsified, and the third layer on the inlet side adsorbs oil that has caused emulsion breakage when removing pigments and off-flavors with activated carbon. Hereinafter, in the emulsion breaking oil adsorption tank, after the fourth layer on the inlet side, the adsorbent with emulsion breaking particles adhering to the emulsion breaking particles and the oil adsorbing material that adsorbs oil are stored alternately. By doing so, the drain water can be made into fresh water by repeating emulsion breakage and oil adsorption.
[0053]
By passing through the adsorbent with emulsion breaking particles and the oil adsorbent, the adsorbent with emulsion breaking particles breaks up the emulsion by releasing the water-oil bond of the emulsified oil and further adsorbs the separated oil. In the oil adsorbing material, the oil that could not be adsorbed by the adsorbent with emulsion breaking particles is adsorbed, and the cleanliness of the drain water is improved by performing such treatment many times.
[0054]
In this case, what is simply stored in a stack of a plurality of adsorbents with emulsion breaking particles or oil adsorbents removes unclear stains by adding at least one layer of activated carbon. It is possible.
[0055]
Here, if a transparent material made of glass or plastic is used as the emulsion breaking oil adsorption tank main body, the state of dirt on the adsorbent with emulsion breaking particles and the oil adsorption material used in the emulsion breaking oil adsorption tank can be visually checked. It becomes possible to confirm, and it becomes possible to judge the exact replacement time.
[0056]
Finally, the fresh water discharged from the emulsion breaking oil adsorption tank is treated so clean that it can be thrown away into the river as it is.
[0057]
【The invention's effect】
As is clear from the above description, the present invention can provide the following effects.
[0058]
First, all drain discharge pipes connected to multiple devices that generate drain water from compressed air are joined to the drain collecting pipe, and a drain trap is installed after all the joined drain discharge pipes are joined. As a result, only one drain trap may be provided, and the point device has a simple configuration, and there is no need to consider control of a plurality of drain traps, which is advantageous in terms of cost.
[0059]
Second, the entire system is installed by preparing a dryer and various filters, related compressed air piping and drain discharge pipes, related on-off valves and check valves, and pressure gauges as an integrated dryer. In this case, preparation and assembly of the drain discharge pipe and drain collecting pipe can be saved, the installation period is shortened, and the cost is advantageous.
[0060]
Thirdly, by installing a pressure gauge that can measure the pressure of the fluid flowing through the drain collecting pipe, it is possible to always select a drain trap usage that is suitable for the capacity, and to install various devices. And related abnormalities can be judged at an early stage.
[0061]
Fourthly, in addition to processing a plurality of devices that generate drain water from compressed air and performing a drain discharge process with one drain trap, each one or a plurality of other devices perform a drain discharge process. Therefore, even if another device is located far from the drain water treatment device or the pipe leading to the drain water treatment device is bent up and down, the drain water can easily flow into the drain water treatment device. .
[Brief description of the drawings]
FIG. 1 is an overall view of the present invention.
FIG. 2 is a general view of conventional technology.
[Explanation of symbols]
10. Air compressor
20 ... Air tank (another device)
30 …… Dust filter (another device)
40 ... Hair dryer (equipment)
50 ... Prefilter (equipment, filter)
60 ... Mist filter (equipment, filter)
21a ... Drain discharge pipe
21c ... Drain discharge pipe
21x ... Drain discharge pipe
21y ... Drain discharge pipe
22 ... Open / close valve
23 ... Check valve
29 ... Drain trap
31a ... Drain discharge pipe
31c ... Drain discharge pipe
31x ... Drain discharge pipe
31y ... Drain discharge pipe
32 ... Open / close valve
33 ... Check valve
39 ... Drain trap
41a ... Drain discharge pipe
41b ... Drain discharge pipe
41c ... Drain discharge pipe
41x ... Drain discharge pipe
41y ... Drain discharge pipe
42 .. Open / close valve
43 ...... Check valve
49 ... Drain trap
51a ... Drain discharge pipe
51b ... Drain discharge pipe
51c ... Drain discharge pipe
51x ... Drain discharge pipe
51y ... Drain discharge pipe
52 .. Open / close valve
53 ... Check valve
59 ... Drain trap
61a ... Drain discharge pipe
61b ... Drain discharge pipe
61c ... Drain discharge pipe
61x ... Drain discharge pipe
61y ... Drain discharge pipe
62 .. Open / close valve
63 ... Check valve
69 ... Drain trap
70 ... Drain water treatment equipment
71 ... Shimizu pipe
101... Compressed air piping
102... Compressed air piping
103 ... Compressed air piping
104 ... Compressed air piping
105 ... Compressed air piping
106... Compressed air piping
150 ... Drain collecting pipe
151... Drain collecting pipe
152... Drain collecting pipe
153 ... Drain collecting pipe
154 ... Drain collecting pipe
155 ... Pressure gauge
156... Open / close valve
157 ... Drain trap
161... Drain collecting pipe
200 ・ ・ ・ ・ Integral dryer

Claims (5)

Drain water generated from compressed air from only a plurality of devices (40, 50, 60) through which the compressed air passes is joined so as not to flow back to the respective devices (40, 50, 60) side, and after joining Drain water is discharged from the compressed air by one or more other devices (20, 30) through which the drain water is discharged and sent to the drain water treatment device (70) for the time determined by the position, and the compressed air passes through. Drained from compressed air, wherein the drain water is discharged for a predetermined time for each of the other devices (20, 30) and sent to the drain water treatment device (70) so as not to flow backward. Oil-water separation method of water.   Drain water is discharged from the plurality of devices (40, 50, 60) only when the drain water is present by checking the presence or absence of drain water at the position after the whole has always joined in a predetermined cycle. The method for separating oil water from drain water generated from compressed air according to claim 1. Drain discharge pipes (41a, 41b, 41c, 51a, respectively) are connected to the plurality of devices (40, 50, 60) so that drain water generated from compressed air can be discharged only from the plurality of devices (40, 50, 60). 51b, 51c, 61a, 61b, 61c) and check valves (43, 43, 61c, 61c, 61c) at intermediate positions of the drain discharge pipes (41a, 41b, 41c, 51a, 51b, 51c, 61a, 61b, 61c). 53, 63), and the drain discharge pipes (41a, 41b, 41c, 51a, 51b, 51c, 61a, 61b, 61c) are all connected to the drain collection pipe (151), and the drain collection pipe An electric drain trap (157) for discharging drain water accumulated in the drain collecting pipe (151) and feeding it to the drain water treatment device (70) is disposed at the position (151). The drain discharge pipes (21a, 21x, 21y, 21c, 31a, 31x, 31y, 31c) are connected to the other devices (20, 30) so that the drain water generated from the compressed air can be discharged by the vessel (20, 30). ) Are connected to the drain discharge pipes (21a, 21x, 21y, 21c, 31a, 31x, 31y, 31c) in the middle of the drain drain pipes (29, 39) and check valves (23, 33) and arranged to connect the drain discharge pipe (21a, 21x, 21y, 21c , 31a, 31x, 31y, 31c) between the drain water treatment system, respectively the drain trap and (157) (70) An oil-water separator for drain water generated from compressed air.   The pressure gauge (155) for measuring the pressure of drain water flowing through the drain collecting pipe (151) is disposed at any position of the drain collecting pipe (151). An oil-water separator for drain water generated from compressed air.   The plurality of devices (40, 50, 60) are a dryer (40) and a single or a plurality of filters (50, 60), and the dryer (40) and a single or a plurality of the filters ( Compressed air pipes (103, 104, 105, 106) arranged before and after and 50, 60), and the drain discharge pipes (41a, 41b, 41c, 51a, 51b, 51c, 61a, 61b, 61c) The compressed air according to claim 4, wherein the drain collecting pipe (151), the check valve (43, 53, 63), and the pressure gauge (155) are integrally formed. An oil-water separator for drain water generated from the water.

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