JP2009274059A - Oil/water separation system and compressed air dehumidification system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily exchange filter elements without causing a useless setting space. <P>SOLUTION: The oil/water separation system 1A includes a pair of oil/water separators 10a, 10b having pipe connection parts 12a, 12b; the filter element filled with an oil adsorbing material in a filter element container; a base part 11 connected with the pipe connection parts 12a, 12b respectively and detachably mounted with the filter element; and a bottomed cylindrical housing 14 detachably mounted on the base part 11 to cover the filter element. Drain water is introduced from the pipe connection part 12a, passed through the filter element, and discharged from the pipe connection part 12b. The pipe connection parts 12a, 12b are mounted with fasteners 18A for hanging the oil/water separators 10a, 10b and fixing them to a rear face panel X2 (wall face) of the casing 42 of a dehumidification device 3. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an oil / water separation system including an oil / water separation device that removes oil from drain water to be treated, and a compressed air dehumidification system including the oil / water separation system.

As this type of oil / water separation system (oil / water separation device) and compressed air dehumidification system, the applicant has disclosed an air dryer with an oil / water separation device in Japanese Patent Laid-Open No. 2001-259346. In this case, in the air dryer with an oil / water separator disclosed by the applicant, the dryer main body and the pair of oil / water separators are housed and integrated in one casing (hereinafter, also simply referred to as “air dryer”). In addition, the oil / water separation device mounted on this type of device employs a configuration in which oil or foreign matter adheres to the filter and is removed from the drain water when drain water containing oil or foreign matter passes through the filter. Yes. In this case, in the oil-water separator for an air dryer disclosed by the applicant, an oil adsorbing material obtained by chopping a raw material of a resin material processed into a fiber is used as a filter. Therefore, when a large amount of oil or foreign matter adheres to the filter with long-term use, it is possible to continuously remove the oil or foreign matter from the drain water by replacing the filter with a new one.
JP 2001-259346 A (page 2-3, FIG. 1-5)

  However, the conventional air dryer disclosed by the applicant has the following problems to be solved. That is, in the air dryer disclosed by the applicant, the dryer main body and the pair of oil / water separators are housed and integrated in one housing. In this case, among the air dryers disclosed by the applicant, in particular, in the type of air dryer in which the dryer main body and both oil-water separators are installed side by side in the housing, a large housing that can accommodate both the dryer main body and both oil-water separators. The body is needed. Therefore, the air dryer disclosed by the applicant has a problem that a valuable installation space is occupied by a large casing.

  Further, in the air dryer disclosed by the applicant, since the oil / water separator is housed in the housing together with the dryer body, each panel of the housing is disassembled prior to filter replacement (the housing is removed from the frame). Work is needed. Furthermore, in the air dryer disclosed by the applicant, when replacing the filter of the oil / water separator, it is necessary to remove the oil / water separator fixed to the frame, and then lift the filter upward from the separator main body and remove it. . For this reason, the work for removing the casing and the work for removing the separator are complicated, and the work time of about half a day is required to replace the filter of the oil / water separator of one air dryer. Is needed. In addition, since this type of oil-water separator has a weight of 50 kg or more, when removing the separator main body from the housing, work with a plurality of workers while using a heavy machine such as a forklift. There is a need. As described above, the air dryer disclosed by the applicant has a problem that the replacement work of the filter is complicated.

  The present invention has been made in view of the problems to be improved, and provides an oil / water separation system and a compressed air dehumidification system that can easily replace a filter element without wasting valuable installation space. The main purpose.

  In order to achieve the above object, an oil / water separation system according to claim 1 is configured to connect a first pipe connection portion for connecting a supply-side pipe for supplying drain water to be treated, and an exhaust for discharging drain water that has been treated. A second pipe connection part for connecting the side pipe, a filter element filled with an oil adsorbent in a cylindrical filter element container, the first pipe connection part and the second pipe connection part Are connected to each other and a base part to which the filter element is detachably attached, and a bottomed cylinder to be detachably attached to the base part so as to cover the filter element attached to the base part And the drain water supplied via the supply side pipe is introduced from the first pipe connection part to pass through the filter element. A pair of oil / water separators to be discharged from the second pipe connection portion to the discharge-side pipe later is provided, corresponds to the discharge-side pipe for one of the oil / water separators, and the oil / water separator for the other oil / water separator An oil / water separator system in which the second pipe connection part in the one oil-water separator and the first pipe connection part in the other oil-water separator are connected to each other by a connecting pipe corresponding to a supply-side pipe. The filter element for rough processing as the filter element is attached to the one oil-water separator, the filter element for main treatment as the filter element is attached to the other oil-water separator, and At least among six of each first pipe connection part, each second pipe connection part and each base part Thing, fasteners for securing the two oil-water separator to one of the walls and ceiling with Tsuri支 is attached.

  The oil-water separation system according to claim 2 is the oil-water separation system according to claim 1, wherein at least one of the sheet-like adsorbent as the oil adsorbent and the strip-like adsorbent as the oil adsorbent is the filter element. The coarse filter element is configured by being filled in a container for at least one of the fine string-like adsorbent as the oil adsorbent and the cotton adsorbent as the oil adsorbent in the filter element container. The main filter element is configured by being filled.

  Further, the oil-water separation system according to claim 3 is the oil-water separation system according to claim 2, wherein the inlet for allowing the drain water to be treated to flow into the filter element container is closed. A destructive material is disposed, and at least one of a first oil adsorbing layer filled with at least one of the sheet adsorbent and the strip adsorbent, and at least one of a string adsorbent and a cotton adsorbent is filled. The roughened filter element is configured by providing the second oil adsorbing layer thus formed on the emulsion breaking material in this order.

  According to a fourth aspect of the present invention, there is provided the oil / water separation system according to the second or third aspect, wherein the inlet for allowing the drain water to be treated to flow into the filter element container is closed in a sheet form. The emulsion breaker is disposed, and an oil adsorbing layer filled with at least one of the fine string adsorbent and the cotton adsorbent is provided on the emulsion breaker. Is configured.

  Furthermore, the oil-water separation system according to claim 5 is the oil-water separation system according to claim 3 or 4, wherein the emulsion breaking material is composed of an amine-based emulsion breaking material.

  The oil / water separation system according to claim 6 is the oil / water separation system according to claim 1 or 5, wherein the oil / water separation device is fixed to either the wall surface or the ceiling surface. The drain water flow path is formed in the oil / water separator so that the drain water to be treated passes through the rough processing filter element and the main processing filter element when the water in the housing is raised. Yes.

  A compressed air dehumidification system according to a seventh aspect of the present invention includes the oil moisture system according to any one of the first to sixth aspects of the present invention, the moisture in the compressed air removed and discharged, and the removed moisture of the processing target. And a dehumidifier that discharges as drain water.

  Furthermore, the compressed air dehumidification system according to claim 8 is the compressed air dehumidification system according to claim 7, wherein the oil / water separator of the oil / water separator system is attached to the outside of the side panel in the housing of the dehumidifier by the fixture. It is fixed on the surface.

  The compressed air dehumidification system according to claim 9 is the compressed air dehumidification system according to claim 8, wherein the oil / water separator of the oil / water separation system is fixed in the vicinity of a heat exhaust hole on the outer surface of the side panel. ing.

  In the oil / water separation system according to claim 1 and the compressed air dehumidification system according to claim 7, the oil / water separation device to which the rough processing filter element is attached and the oil / water separation device to which the main treatment filter element is attached are connected via a connecting pipe. Are connected to each other, and both oil-water separators are supported on at least one of the first pipe connection portions, the second pipe connection portions, and the base portions of the both oil-water separators. A fixing tool for fixing to either the wall surface or the ceiling surface is attached.

  Therefore, according to the oil / water separation system and the compressed air dehumidification system, by providing two oil / water separators, oil and foreign matter that could not be completely removed by the rough processing filter element of one oil / water separator are removed. Not only can it be removed reliably by the main processing filter element of the separator, but it is not necessary to remove the housing or remove the separator body from the frame when replacing the filter element, unlike conventional air dryers. As a result, the replacement work can be easily performed in a short time. Further, according to the oil / water separation system and the compressed air dehumidification system, a sufficiently wide space can be secured below the oil / water separation device by attaching the oil / water separation device to the wall surface or the ceiling surface. Therefore, the oil and water separation system and the compressed air dehumidification system can absorb oil and the like because the housing and the filter element can be easily removed from the base part by simply moving the housing and the filter element downward with respect to the base part during replacement work. Thus, the filter element can be easily replaced even when the weight of the filter element is increased. Further, it is possible to avoid a situation where a valuable installation space is occupied by the oil / water separator, and to effectively use the space secured below the oil / water separator.

  Further, according to the oil / water separation system according to claim 2 and the compressed air dehumidification system according to claim 7, at least one of the sheet-like adsorbent and the strip-like adsorbent is filled in the filter element container as an oil adsorbent. The rough processing filter element is configured, and at least one of the fine string-like adsorbent and the cotton-like adsorbent is filled as an oil adsorbent in the filter element container to constitute the main processing filter element. Adsorbent (sheet-like adsorbent) in which a relatively large lump of oil contained in the drain water has a relatively large gap when the drain water is passed through the rough processing filter element of one oil-water separator. (Or strip-shaped adsorbents) and removed, and a small amount of oil in the coarse filter element By using the other oil / water separator without removing the water, the roughing filter element is prevented from clogging in a short period of time, and the purification capacity of the roughing filter element is maintained for a sufficiently long period. In addition, when the drain water roughly treated by one oil-water separator is passed through the main filter element of the other oil-water separator, a small lump of oil contained in the drain water is formed. Since it is adsorbed by an oil adsorbent (a fine string adsorbent or a cotton adsorbent) having a relatively small gap, the oil can be reliably removed from the drain water to be treated. In addition, according to the oil / water separation system and the compressed air dehumidification system having the separate and independent rough processing filter element and the main processing filter element, the sheet-like adsorbent or strip for the filter element container for the rough processing filter element is used. The amount of adsorbent-like adsorbent and the amount of fine-string adsorbent and cotton-like adsorbent filled in the filter element container for this processing filter element can be specified separately and optimally. By appropriately defining these in accordance with the state of the drain water to be drained, the oil can be removed reliably and in a short time without greatly impeding the passage of the drain water.

  Furthermore, according to the oil / water separation system according to claim 3 and the compressed air dehumidification system according to claim 7, the sheet-like emulsion breaking material is disposed so as to close the drain water inlet of the filter element container. A first oil adsorbing layer filled with at least one of a sheet adsorbent and a strip adsorbent and a second oil adsorbing layer filled with at least one of a fine string adsorbent and a cotton adsorbent By providing the rough processing filter element in this order on the breaking material, the drain water to be treated containing the emulsion that is difficult to adhere to the oil adsorbing material (it is difficult to remove by the oil adsorbing material) is the sheet. The emulsion breakage (separation of oil and moisture) occurs when passing through the emulsion breaker, so it was emulsified from the drain water to be treated. Not only can the water content be removed reliably, but the oil is adsorbed by the oil adsorbent in the first oil adsorbing layer immediately after the emulsion breakage, thus avoiding the situation where the oil and water that has broken the emulsion are emulsified again. Thus, the oil can be surely removed. Further, according to the oil / water separation system and the compressed air dehumidification system, since only a relatively large lump of oil is removed in the first oil adsorption layer, for example, the second oil is placed immediately behind the sheet-like emulsion breaking material. Compared with the configuration in which the adsorption layer is provided, the purification capability of the rough processing filter element can be improved over a sufficiently long period by avoiding a situation where the oil adsorbent constituting the first oil adsorption layer is clogged in a short period of time. In addition, the oil that could not be removed in the first oil adsorption layer can be sufficiently removed in the second oil adsorption layer.

  According to the oil / water separation system according to claim 4 and the compressed air dehumidification system according to claim 7, the sheet-like emulsion breaking material is disposed so as to close the drain water inlet in the filter element container. In addition, when an oil adsorbing layer filled with at least one of a fine string-like adsorbent and a cotton-like adsorbent is provided on the emulsion breaking material, the main filter element is configured so that it passes through the coarse filter element. Even if an emulsion is contained in the drain water that has been coarsely treated, the drain water is destroyed when it passes through the sheet-like emulsion breaker (separation of oil and water), so the emulsion is removed from the drain water. The oil adsorbed layer can be formed immediately after the emulsion breakage. Since the oil by the oil sorbent for is adsorbed, oil and moisture emulsion breaking can be removed reliably oil to avoid a situation that emulsification again.

  Furthermore, according to the oil-water separation system according to claim 5 and the compressed air dehumidification system according to claim 7, the emulsion-breaking material is composed of an amine-based emulsion-breaking material, so that the emulsified oil and water are reliably broken. (Separated into oil and water).

  Further, according to the oil / water separation system according to claim 6 and the compressed air dehumidification system according to claim 7, in a state where both the oil / water separation devices are fixed to either the wall surface or the ceiling surface, the drain water to be treated is contained in the housing. The drain water flow path is formed in the oil / water separator so that it passes through the rough processing filter element and the main processing filter element when the oil is raised. By pumping the drain water in the direction of rising in the housing, the oil to be removed from the drain water can be reliably attached to the oil adsorbing material without being precipitated on the bottom surface of the housing.

  Further, according to the compressed air dehumidification system of the eighth aspect, the oil / water separator of the oil / water separator system is fixed to the outer surface of the side panel of the housing of the dehumidifier by a fixture, so The installation space around the installation location of the dehumidifier can be effectively utilized.

  Furthermore, according to the compressed air dehumidification system of claim 9, the oil / water separation device of the oil / water separation system is fixed in the vicinity of the exhaust heat hole on the outer surface of the side panel, so that the oil / water separation is performed by the exhaust heat from the exhaust heat hole. Since the apparatus can be warmed, it is possible to avoid a situation in which the drain water freezes in the oil / water separator when using the compressed air dehumidification system in winter.

  Hereinafter, the best mode of an oil / water separation system and a compressed air dehumidification system according to the present invention will be described with reference to the accompanying drawings.

  Initially, the structure of compressed air dehumidification system S1A is demonstrated with reference to drawings.

  A compressed air dehumidification system S1A shown in FIG. 1 is an example of a compressed air dehumidification system according to the present invention, and includes an oil / water separation system 1A that is an example of an oil / water separation system according to the present invention, and includes an air compressor 2 and a dehumidifier. (Air dryer) 3 is provided. The compressed air dehumidifying system S1A is configured to compress the atmosphere to a predetermined pressure and remove moisture contained in the compressed air so that it can be supplied to, for example, factory equipment (hereinafter also referred to as “supplier”). . In this case, in this compressed air dehumidification system S1A, an oil type air compressor is employed as the air compressor 2 for compressing the atmosphere. The air compressor 2 is connected to the dehumidifier 3 by a compressed air supply pipe 4 a in order to supply compressed air to the dehumidifier 3. Further, the air compressor 2 is connected to the oil / water separation system 1A by a drain water supply pipe 5a in order to supply drain water generated during the compression of the atmosphere to the oil / water separation system 1A.

  The dehumidifying device 3 is an example of the dehumidifying device in the present invention, and the refrigeration device 41 having the compressor 41a, the evaporator 41b, the expansion valve 41c, and the condenser 41d is in a rectangular parallelepiped casing 42 (see FIGS. 2 to 4). ). The dehumidifier 3 condenses and removes moisture in the compressed air by cooling the compressed air compressed by the air compressor 2 and supplied through the compressed air supply pipe 4a to a predetermined temperature below the dew point temperature. The structure to be adopted is adopted. In addition, since the operating principle of the apparatus which removes the water | moisture content in compressed air with the freezing apparatus 41 like the dehumidification apparatus 3 is well-known, the detailed description is abbreviate | omitted. In this case, in the dehumidifying device 3, in order to exhaust the heat discharged from the compressor 41a and the condenser 41d in the refrigeration device 41 to the outside of the housing 42, as shown by a broken line in FIG. The side panel (for example, the back panel X2) is provided with a heat exhaust hole 42a. Note that the exhaust heat hole 42a is blocked by a punching metal, a metal mesh, or the like, thereby preventing dust from entering the housing 42.

  Further, as shown in FIG. 1, the dehumidifying device 3 is connected to a supply target body (not shown) by a compressed air supply pipe 4b in order to supply compressed air from which moisture has been removed to the supply target body. Yes. Further, the dehumidifying device 3 separates the oil and water by the drain water supply pipe 5a in order to supply the water (drain water) removed from the compressed air supplied through the compressed air supply pipe 4a to the oil / water separation system 1A. It is connected to the system 1A. In this case, the water (drain water) removed from the compressed air by the dehumidifier 3 is mist generated in the air compressor 2 when the air is compressed by the air compressor 2 (oil atomized in the cylinder of the air compressor 2). ) And oil applied during construction of the compressed air supply pipe 4a in order to avoid rusting in the compressed air supply pipe 4a. In addition, the dehumidifying apparatus in the present invention is not limited to a type of apparatus that condenses and removes moisture in the compressed air by the refrigeration apparatus 41 like the dehumidifying apparatus 3 described above, and may employ a filter type dehumidifying apparatus. it can.

  On the other hand, as shown in FIGS. 1, 3, and 4, the oil / water separation system 1A includes oil / water separators 10a and 10b (hereinafter also referred to as “oil / water separator 10” when not distinguished) and a pair of fixtures 18A. It is configured. Moreover, as shown in FIGS. 2-4, the oil-water separator 10 is being fixed to the side panel in this case 42 of the dehumidifier 3 (in this example, back panel X2: an example of the "wall surface" in this invention). . In this case, the oil / water separator 10a corresponds to “one oil / water separator” in the present invention, and includes a base portion 11, pipe connecting portions 12a and 12b, a filter element 13a, and a housing 14, as shown in FIG. It is configured. Further, the oil / water separator 10b corresponds to the “other oil / water separator” in the present invention, and as shown in FIG. 6, the oil / water separator described above is provided except that the filter element 13b is provided instead of the filter element 13a. The configuration is the same as that of the device 10a. In the following description, when the filter elements 13a and 13b are not distinguished, they are also referred to as “filter element 13”.

  As will be described later, the oil / water separators 10a and 10b are configured to perform an oil / water separation process on drain water containing oil and foreign matter, and to discharge drain water from which the oil and foreign matter have been removed. ing. Specifically, in the oil / water separation system 1A, first, the oil / water separation device 10a performs an oil / water separation process on the drain water supplied from the air compressor 2 or the dehumidifier 3 via the drain water supply pipe 5a ( (Coarse treatment) is performed to remove oil and foreign matter to some extent, and the treated drain water is supplied to the oil / water separator 10b via the connecting pipe 5c. Next, the oil / water separator 10b performs an oil / water separation process (main process) on the drain water supplied via the connecting pipe 5c to remove oil and foreign substances almost completely, and the treated drain water is removed. It is discharged through the drain water discharge pipe 5b. The oil / water separation process by the oil / water separators 10a and 10b will be described in detail later.

  The base portion 11 is formed in a cylindrical shape whose upper end portion is closed, and a filter head 11a for attaching the filter element 13 is disposed therein. In addition, a drain water supply pipe 5a (or connecting pipe 5c) is connected to the peripheral wall of the base part 11 and a drain water discharge is connected to the pipe connecting part 12a (the “first pipe connecting part” in the present invention). The pipe connection part 12b ("the second pipe connection part" in the present invention) to which the pipe 5b for connection (or the connection pipe 5c) is connected is respectively connected. The pipe connecting part 12b passes through the peripheral wall of the base part 11 and is connected to the filter head 11a, whereby the filter element 13 and the drain water discharge pipe 5b (or the connecting pipe 5c are connected via the filter head 11a. ).

  In this case, the drain water supply pipe 5a is an example of the supply side pipe in the present invention, and in the compressed air dehumidification system S1A (oil-water separation system 1A), the drain water supply pipe 5a is located upstream of the drain water flow path. It is connected to the pipe connection part 12a of the oil / water separator 10a. Further, the drain water discharge pipe 5b is an example of the discharge side pipe in the present invention, and in this compressed air dehumidification system S1A (oil water separation system 1A), the oil water located on the downstream side in the drain water flow path. It is connected to the pipe connection part 12b of the separation device 10b. The above-mentioned connecting pipe 5c corresponds to the discharge side pipe in the present invention for the oil / water separator 10a, and corresponds to the supply side pipe in the present invention for the oil / water separator 10b. Specifically, the connecting pipe 5c is a pipe that mutually connects the pipe connecting part 12b of the oil / water separator 10a and the pipe connecting part 12a of the oil / water separator 10b, and the rough treatment by the oil / water separator 10a is completed. Then, the drain water discharged from the oil / water separator 10a is supplied to the oil / water separator 10b.

  The filter element 13a is an example of a rough processing filter element in the present invention. As shown in FIG. 5, the filter element container 20, the nonwoven fabric 25 and the oil adsorbent 26a accommodated in the filter element container 20 are provided. , 26b. The filter element container 20 includes a container body 21 having an inlet 21a opened at the bottom thereof, and a lid 22 having an outlet 22a formed therein and attached to an upper opening of the container body 21. 11 filter heads 11a. In this case, as an example, the container main body 21 is formed by opening an inlet 21a at the bottom thereof after being processed into a container by a blow molding process using polypropylene. The lid 22 is formed by an injection molding process using polyethylene as an example. In this case, a cylindrical body functioning as a connecting pipe with the filter head 11a is erected on the peripheral portion of the outlet 22a on the outer surface of the lid 22, and a sealing O-ring 23 is disposed on the inner surface thereof. Yes.

  The nonwoven fabric 25 corresponds to the “sheet-like emulsion breaking material” in the present invention, and is composed of an amine-based emulsion breaking sheet as an example. In this case, in the filter element 13a, several nonwoven fabrics 25 are disposed in the container body 21 so as to close the inlet 21a. The oil adsorbing material 26a is an oil adsorbing material having a relatively large gap, and as an example, the oil adsorbing material 26a is composed of a piece of polypropylene cut into a strip shape (an example of the “strip-shaped adsorbing material” in the present invention). The container body 21 is filled to constitute the first oil adsorption layer in the present invention. In this case, instead of the small piece of polypropylene cut into strips, sheet-like polypropylene (an example of the “sheet-like adsorbent” in the present invention) is filled into the container main body 21 in a wound or folded state. The 1st oil adsorption layer in this invention can also be comprised. When a sheet-like adsorbent is employed as the oil adsorbent 26a, each sheet-like adsorbent is overlapped when viewed from the side of the container body 21 (the drain water flowing in from the inflow port 21a is added to each sheet). By filling (passing between the adsorbents and flowing toward the outlet 22a), it is possible to avoid a situation in which the flow resistance of the drain water excessively increases when passing through the filter element 13a.

  Furthermore, the oil adsorbent 26b is an oil adsorbent having a relatively small gap, and is composed of, for example, polypropylene processed into a cotton shape (an example of the “cotton adsorbent” in the present invention), It fills in the container main body 21, and comprises the 2nd oil adsorption layer in this invention. In this case, instead of the polypropylene processed into a cotton shape, the container body 21 is filled with a fine string knitted from polypropylene fibers (an example of the “fine string-like adsorbent” in the present invention). Two oil adsorption layers can also be constructed. In this filter element 13a, the non-woven fabric 25 is laminated, and the layer filled with the oil adsorbing material 26a (first oil adsorbing layer in the present invention) and the layer filled with the oil adsorbing material 26b (main book) The second oil adsorbing layer in the present invention is provided in this order, and the drain water flowing into the container main body 21 from the inflow port 21a passes through the nonwoven fabric 25, the layer of the oil adsorbing material 26a, and the layer of the oil adsorbing material 26b in this order. A configuration that passes through and flows out from the outlet 22a is employed.

  On the other hand, the filter element 13b is an example of the filter element for main processing in the present invention. As shown in FIG. 6, the filter element 13a is filled with the layer filled with the oil adsorbent 26a and the oil adsorbent 26b. Instead of the formed layer, the structure is almost the same as that of the filter element 13a except that only a layer filled with the oil adsorbent 26b is provided in the container body 21. In this case, in this filter element 13b, dozens of nonwoven fabrics 25 are disposed in the container body 21 so as to close the inflow port 21a. Further, in this filter element 13b, a layer (oil adsorbing layer in the present invention) filled with the oil adsorbing material 26b is provided on the laminated nonwoven fabric 25, and flows into the container main body 21 from the inlet 21a. A configuration is adopted in which the drained water sequentially passes through the layers of the nonwoven fabric 25 and the oil adsorbent 26b and flows out from the outlet 22a.

  In addition, about the number of the nonwoven fabrics 25 arrange | positioned in the container 20 for filter elements, and the filling amount of oil adsorption material 26a, 26b, the state of the drain water of a process target (The foreign material and oil content contained in the drain water of a process target) The filter elements 13a and 13b can be changed as appropriate according to the amount. In the oil / water separation system 1A, the length of the drain water passing direction in the filter elements 13a and 13b in the oil / water separators 10a and 10b (that is, from the bottom of the container main body 21 to the tip of the cylindrical body of the lid 22). As an example, the distance L3) is 315 mm. In this case, in the compressed air dehumidification system S1A (oil / water separation system 1A), as described above, the entire filter elements 13a and 13b (the filter element container 20, the oil adsorbents 26a and 26b, and the oil / water separators 10a and 10b) Since all of the non-woven fabrics 25 are formed of a resin material (polypropylene in this example), the weight is very light, 10 kg or less per piece. Therefore, a heavy machine such as a forklift is not required during replacement work described later.

  The housing 14 is formed in a bottomed cylindrical body and, as shown in FIGS. 5 and 6, is attached to the base portion 11 so that the filter element 13 is accommodated therein (so as to cover the filter element 13). . Further, the bottom wall of the housing 14 is formed in a dome shape that protrudes outward as it approaches the central portion, and a drain port 15 is disposed at the most protruding portion (central portion). In this case, the base portion 11 and the housing 14 configured as described above are, for example, an opening side end portion (lower end portion) in the peripheral wall of the base portion 11 and an opening side end portion (upper end portion) in the peripheral wall of the housing 14. Are inserted and connected to each other. An O-ring 16 for sealing is disposed on each overlapping portion of the peripheral wall of the base portion 11 and the peripheral wall of the housing 14. The base portion 11 and the housing 14 are integrated so that the connecting portion is fastened by a metal band 17. In this case, in the oil / water separation system 1A, the distance L4 from the upper end of the housing 14 to the lower end of the drain port 15 in the oil / water separators 10a and 10b is 400 mm as an example.

  On the other hand, the fixture 18A is a fixture for attaching the oil / water separation system 1A (oil / water separators 10a and 10b) to a wall surface (in this example, the outer surface of the rear panel X2 in the housing 42 of the dehumidifier 3). In this compressed air dehumidification system S1A, the pipe connection part 12a of one of the oil / water separators 10a and 10b (the oil / water separator 10a in this example) constituting the oil / water separator 1A and the other one ( In this example, two locations of the pipe connection portion 12b of the oil / water separator 10b) are held by the fixture 18A, respectively, so that the oil / water separator system 1A (oil / water separators 10a, 10b) is supported (hanged and supported). The structure which fixes it is adopted. As shown in FIG. 7, the fixture 18A includes a U-shaped stay 31 that holds the pipe connecting portion 12a (or the pipe connecting portion 12b) in a tightened state, an L-shaped bracket 32a, and a bracket 32a. And a bolt 33 for fixing the U-shaped stay 31 and a buffer material 34 (for example, an elastic resin or rubber) disposed between the pipe connecting portion 12a (12b) and the U-shaped stay 31. Has been. In addition, in this fixing tool 18A, although the piping connection part 12a (12b) is mounted above the horizontal extension part in the bracket 32a, the structure hold | maintained in the state clamp | tightened by the U-shaped stay 31 is employ | adopted. A configuration in which the pipe connecting portion 12a (12b) is disposed below the horizontal extension portion of the bracket 32a and is supported by the U-shaped stay 31 or the like may be employed.

  Next, a method of using the compressed air dehumidification system S1A (oil-water separation system 1A) will be described with reference to the drawings.

  In the compressed air dehumidifying system S1A, as described above, the rear panel X2 in the housing 42 of the dehumidifying device 3 is supported by the oil / water separating system 1A (both oil-water separating devices 10a and 10b) being supported by the two fixtures 18A. The structure fixed to the outer surface of is adopted. Specifically, as shown in FIGS. 2 to 4, the pipe connection part 12 b of the oil-water separator 10 a and the pipe connection part 12 a of the oil-water separator 10 b are connected by a connecting pipe 5 c and the pipe of the oil-water separator 10 a The fixing tool 18A is attached to the connection part 12a and the pipe connection part 12b of the oil / water separator 10b. Next, both fixtures 18A are fixed to the casing 42 so that the oil-water separators 10a and 10b are positioned in the vicinity of the exhaust heat hole 42a in the casing 42. Subsequently, the drain water supply pipe 5a is connected to the pipe connection part 12a of the oil / water separator 10a, and the drain water discharge pipe 5b is connected to the pipe connection part 12b of the oil / water separator 10b. In this oil / water separation system 1A, as shown in FIGS. 2 to 4, a treated water monitoring tank is connected between the pipe connection portion 12b and the drain water discharge pipe 5b in the oil / water separator 10b. In order to facilitate understanding of the invention, description of the treated water monitoring tank is omitted. 2-4 and FIG. 8 referred later, only the end of the drain water supply pipe 5a on the oil / water separator 10a (10b) side is shown, and the air compressor 2 and dehumidifier in the drain water supply pipe 5a are shown. The illustration of the end portion on the apparatus 3 side is omitted.

  In the state where the installation as described above is completed, when the compressed air dehumidifying system S1A is operated, the drain water to be treated discharged from the air compressor 2 or the dehumidifying device 3 is drain water supply pipe 5a, oil water It passes through the separator 10a, the connecting pipe 5c, the oil / water separator 10b, and the drain water discharge pipe 5b in this order, and is drained to a drainage channel (not shown). Specifically, the drain water supplied to the oil / water separator 10a through the drain water supply pipe 5a is first introduced from the pipe connection portion 12a to the periphery of the filter head 11a in the base portion 11, and then in the filter element 13a. The filter element container 20 and the housing 14 are pumped downward. Next, the drain water that has reached the bottom surface of the housing 14 is removed so that a large foreign matter is caught between the housing 14 and the filter element container 20, and then the filter element container 20 from the inlet 21 a in the filter element 13 a. And then passed through the layer in which the nonwoven fabric 25 is laminated, the layer filled with the oil adsorbent 26a, and the layer filled with the oil adsorbent 26a in this order ("drain water to be treated in the present invention"). An example of a state in which “when the inside of the housing is raised”).

  In this case, the drain water discharged from the air compressor 2 or the dehumidifying device 3 contains a liquid (emulsion: hereinafter, also simply referred to as “emulsion”) in which oil and water are mixed and emulsified. . Therefore, in this oil-water separation system 1A, first, the drain water flow path is configured so that the drain water containing the emulsion passes through the layer of the nonwoven fabric 25 (sheet-like emulsion breaking material), A configuration is adopted in which the emulsion is broken (oil and water are separated). The drain water that has undergone emulsion breakage after passing through the layer of nonwoven fabric 25 passes a relatively large lump of oil when passing through the layer of oil adsorbent 26a (in this example, a piece of polypropylene cut into strips). Can be removed in the layer of the oil adsorbent 26a when passing through the layer of the oil adsorbent 26b (in this example, polypropylene processed into a cotton-like shape) after being attached to the oil adsorbent 26a and removed. A small amount of oil that did not exist adheres to the oil adsorbent 26b and is removed. Thereby, the rough process of the drain water by the oil-water separator 10a (filter element 13a) is completed. Thereafter, the drain water that has been subjected to the roughing treatment flows out from the outlet 22a into the filter head 11a, and is discharged from the pipe connecting portion 12b to the connecting pipe 5c.

  On the other hand, the drain water supplied to the oil / water separator 10b via the connecting pipe 5c is first introduced from the pipe connecting part 12a to the periphery of the filter head 11a in the base part 11, and then the filter element container 20 in the filter element 13b. And the housing 14 are pumped downward. Next, the drain water that has reached the bottom surface of the housing 14 flows into the filter element container 20 from the inlet 21a in the filter element 13b, and includes a layer in which the nonwoven fabric 25 is laminated and a layer in which the oil adsorbent 26b is filled. It is made to pass in this order (another example of the state “when drain water to be treated is raised in the housing” in the present invention). At this time, the drain water that has been subjected to the rough treatment by the oil / water separator 10a (filter element 13a) may still contain a very small amount (ultra small lump) of emulsion. Therefore, in this oil / water separation system 1A, the drain water flow path is configured so that the drain water that has undergone the rough treatment first passes through the layer of the nonwoven fabric 25 (sheet-like emulsion breaking material). A configuration that completely breaks the emulsion is employed.

  In addition, the drain water whose emulsion has been broken by passing through the layer of the nonwoven fabric 25 passes through the layer of the oil adsorbent 26b (in this example, polypropylene processed into cotton), and the oil / water separator 10a (filter) A small oil lump that could not be removed by the element 13a) and a small oil lump newly broken by the layer of the nonwoven fabric 25 in the filter element 13b adhere to the oil adsorbent 26b and are almost completely removed. Thereby, the main process of the drain water by the oil-water separator 10b (filter element 13b) is completed. Thereafter, the drain water for which this process has been completed flows out from the outlet 22a into the filter head 11a and is discharged from the pipe connection portion 12b to the drain water discharge pipe 5b. In this case, in the oil / water separation system 1A, in each of the oil / water separation devices 10a and 10b, each treatment layer (the layer of the nonwoven fabric 25, the layer of the oil adsorbent 26a and the layer of the oil adsorbent 26a) in the direction in which drain water rises in the filter element 13. A structure that passes through the layer of the oil adsorbent 26b is employed. In this case, since the oil contained in the drain water or the oil produced by the emulsion breakage is lighter than the water, a force is exerted to float inside the filter element 13 toward the filter head 11a. Therefore, in the oil / water separation system 1A, the oil to be removed passes through the above-mentioned treatment layers by the force of the oil itself to float while being pumped upward together with the moisture. This makes it easy for oil to adhere to the oil adsorbents 26 a and 26 b without staying at the bottom of the housing 14.

  Further, in the compressed air dehumidification system S1A (oil-water separation system 1A), as described above, both the oil-water separation devices 10a and 10b are supported by the two fixtures 18A so that the rear surface of the housing 42 of the dehumidification device 3 is supported. The structure fixed to the outer surface of the panel X2 is employ | adopted. Therefore, by fixing the oil / water separation system 1 </ b> A to the upper part of the casing 42, it is possible to secure a sufficient space below the both oil / water separators 10. In this case, in the oil / water separation system 1A, as described above, the distance L3 from the lower end portion to the upper end portion of the filter element 13 of the both oil / water separation devices 10 is 315 mm. Moreover, in this oil-water separation system 1A, the distance L4 from the upper end part of the housing 14 to the lower end part of the drain port 15 in both the oil-water separation apparatuses 10 is 400 mm. Therefore, the distance L5 (FIGS. 2 and 3) in the height direction of the space secured below the both oil-water separators 10 is equal to or greater than 400 mm (that is, the upper end of the housing 14 in the oil-water separator 10). The oil-water separation system 1A (both oil-water separation devices 10) is mounted on the casing 42 so that the distance L1 (see FIGS. 2 and 3) between the floor surface X1 and the floor surface X1 is equal to or greater than 715 mm, which is the sum of the distance L3 and the distance L4. By fixing the filter element 13 to the base portion 11, the filter element 13 can be easily detached from the base portion 11 by moving the housing 14 downward while maintaining the state where the filter element 13 is attached to the base portion 11.

  In this case, when removing the housing 14 from the base portion 11, in order to secure a work space so that the band 17 can be sufficiently expanded, a wall surface (in this example, a casing) It is preferable that a distance L2 (see FIGS. 2 and 4) between the base portion 11 and the housing 14 is 30 mm or more. As a result, the band 17 can be sufficiently expanded and the housing 14 can be easily detached from the base portion 11. Thereby, the filter element 13 attached to the base part 11 can be easily removed. At this time, since a sufficiently wide space is secured below both the oil-water separators 10, a container (not shown) for storing drain water dripping from the filter element 13 is provided in the oil-water separator 10. The filter element 13 can be replaced in a state where it is installed below.

  In addition, when removing the filter element 13 from the base part 11 after removing the housing 14 from the base part 11, as mentioned above, the distance L5 in the height direction in the space below the both oil-water separators 10 needs to be 400 mm or more. However, for example, in a state where the connection of the housing 14 to the base portion 11 is released and the housing 14 is slightly moved downward with respect to the base portion 11, the filter element 13 is dropped into the housing 14. In this way, the filter element 13 can be removed from the base portion 11. In the case of adopting such a removal method, it is only necessary to move the housing 14 downward until the upper end of the filter element 13 (for example, the outer peripheral portion of the lid 22) can be touched. If the distance L5 in the height direction in the space below the device 10 is about 100 mm, the filter element 13 can be removed from the base portion 11.

  In this case, as described above, since the filter element 13 is configured to be very lightweight, when replacing the filter element 13 of the oil-water separator 10, not only a heavy machine such as a forklift is required, but also one person Even if a worker works, the work can be completed in 30 minutes or less. The filter element 13 employed in the oil / water separator 10 of the compressed air dehumidification system S1A (oil / water separator 1A) is smaller than the filter element of the oil / water separator in the conventional air dryer disclosed by the applicant. It has become. Therefore, the replacement frequency may be higher than that of conventional devices.

  However, in this compressed air dehumidification system S1A (oil-water separation system 1A), a configuration is adopted in which drain water to be treated is treated in stages when passing through both oil-water separation devices 10a and 10b in order. Specifically, in the oil / water separation system 1A, as described above, the drain water to be treated is roughly treated when passing through the filter element 13a in the oil / water separator 10a, and then the oil / water separator 10b. This processing is performed when passing through the filter element 13b. Therefore, the filter element 13a for rough treatment in the oil / water separator 10a removes only relatively large oil and foreign matters contained in the drain water to be treated and allows fine oil and foreign matters to pass therethrough. It is possible to maintain the purification capacity over a long period of time. Further, the main filter element 13b in the oil / water separator 10b is included in the drain water (drain water from which relatively large oil or foreign matter has been removed) roughly processed by the filter element 13a in the oil / water separator 10a. Since it is only necessary to remove the fine oil and foreign matters, it is possible to maintain the purification capacity for a sufficiently long period in the same manner as the filter element 13a. In this case, in the state where the oil concentration of the drain water that has been treated exceeds the reference value, the drain water cannot be discharged into the sewer, etc., and is treated separately from normal sewage as industrial waste. Need arises. Therefore, it is very significant to maintain the treatment capacity at which the oil concentration is below the reference value.

  Further, as described above, in this compressed air dehumidification system S1A (oil-water separation system 1), the filter element 13 can be easily replaced in a very short time, that is, maintainability is improved. The human load and time load during the replacement work are sufficiently reduced. Furthermore, since the replacement work is easy as described above, the filter element 13 can be periodically replaced in a short period before the filtering ability of the filter element 13 is greatly reduced. Moreover, in this compressed air dehumidification system S1A, as mentioned above, both oil-water separators 10a and 10b are being fixed in the vicinity of the exhaust heat hole 42a in the housing 42 of the dehumidifier 3. For this reason, when the compressed air dehumidification system S1A is in operation, the exhaust heat from the refrigeration apparatus 41 (the compressor 41a and the condenser 41d) in the housing 42 passes through the exhaust heat hole 42a and enters the oil-water separators 10a and 10b. Heat will be transferred. Therefore, both the oil-water separators 10a and 10b are warmed by the exhaust heat from the dehumidifier 3 even in winter when drain water is frozen.

  On the other hand, Japanese Patent No. 3541886 discloses an oil separation tank (10) for separating oil and water, a foreign matter capturing tank (20) provided with a filter element (22) for causing emulsion breakage, and an adsorption with emulsion breaking particles. There is disclosed an oil / water separator (1A) including an emulsion breaking oil adsorption tank (30) provided with a material (32), an oil adsorbent (33) and activated carbon (34). In this case, in the oil / water separator (1A), the oil separation tank (10), the foreign matter catching tank (20), and the emulsion breaking oil adsorption tank (30) are configured separately, and the oil separation tank ( 10) and the foreign matter catching tank (20) are connected to each other by a connecting pipe (272), and the foreign matter catching tank (20) and the emulsion breaking oil adsorption tank (30) are connected to each other by a connecting pipe (273). ing. Therefore, in the oil / water separator (1A), when the oil and water separated in the oil separation tank (10) pass through the connecting pipe (272), they are emulsified or the emulsion is destroyed in the foreign matter catching tank (20). There is a risk that the oil and water that has been used will be emulsified again when passing through the connecting pipe (273).

  For this reason, in this oil-water separator (1A), it is necessary to provide multiple layers of the adsorbent with emulsion breaking particles (32) in the emulsion breaking oil adsorption tank (30) located at the end of the drain water flow path. There is a risk that the production cost will rise, and there is a risk that the emulsion that has not been sufficiently destroyed in the emulsion breaking oil adsorption tank (30) may be discharged together with moisture as treated drain water. Further, in the oil / water separator (1A) having a very long drain water flow path, the loss of pressure applied to the drain water (reduction in the pumping power of the drain water) is very large. For this reason, it is not easy for drain water containing emulsion and oil to pass through the emulsion breaking oil adsorption tank (30) in which a plurality of treatment layers are stacked in layers, and thus purification treatment. May not be smooth.

  On the other hand, in the oil / water separation system 1 (the filter element 13 in the oil / water separator 10), as described above, the layer of the nonwoven fabric 25 for the purpose of breaking the emulsion and the oil adsorbents 26a for adsorbing the oil component, 26b (or only the oil adsorbent 26b) is accommodated in one filter element container 20. Therefore, in this oil / water separation system 1A, the oil generated by the emulsion breakage when passing through the layer of the nonwoven fabric 25 adheres to the oil adsorbent 26 and is removed before it is emulsified again. Further, since the flow path of the drain water can be sufficiently shortened, the loss of pressure applied to the drain water can be sufficiently reduced. As a result, a smooth and speedy purification process is possible.

  Thus, in the oil / water separation system 1A and the compressed air dehumidification system S1A, the oil / water separator 10a to which the filter element 13a (coarse processing filter element) is attached and the filter element 13b (main processing filter element) are attached. The oil / water separator 10b is connected to each other via the connecting pipe 5c, and at least one of the pipe connections 12a and 12b and the base 11 in each of the oil / water separators 10a and 10b (this In the example, both the oil / water separators 10a and 10b are supported on the pipe connection part 12a of the oil / water separator 10a and the pipe connection part 12b of the oil / water separator 10b, and either the wall surface or the ceiling surface (this) In the example, for fixing to the rear panel X2 of the housing 42 in the dehumidifying device 3 (an example of a wall surface). Fixture 18A is attached.

  Therefore, according to the oil / water separation system 1A and the compressed air dehumidification system S1A, the oil / water separators 10a and 10b are provided, so that oil and foreign matter that cannot be completely removed by the filter element 13a of the oil / water separator 10a are removed. The filter element 13b of the separation device 10b can be surely removed, and unlike the conventional air dryer, the operation of removing the housing 42 when replacing the filter elements 13a and 13b, or the separation device main body (in this example, the base portion) 11 and the like can be made unnecessary, so that the replacement work can be easily performed in a short time. In addition, according to the oil / water separation system 1A and the compressed air dehumidification system S1A, the both oil / water separation devices 10a and 10b are attached to the wall surface (in this example, the outer surface of the rear panel X2 of the housing 42). A sufficiently wide space can be secured below the devices 10a and 10b. Therefore, since the housing 14 and the filter elements 13a and 13b can be easily detached from the base portion 11 simply by moving the housing 14 and the filter elements 13a and 13b downward with respect to the base portion 11, the oil / water separation system 1A and the compressed air dehumidification system S1A can be used. Accordingly, it is possible to easily replace the filter element 13a, 13b even when the weight of the filter element 13a, 13b is increased by adsorbing oil or the like. Further, it is possible to avoid the situation where the valuable installation space is occupied by the both oil / water separators 10a and 10b, and to effectively use the space secured below the both oil / water separators 10a and 10b oil / water separation system 1A.

  Further, according to the oil / water separation system 1A and the compressed air dehumidification system S1A, at least one of a sheet-like adsorbent and a strip-like adsorbent (in this example, an oil adsorbent 26a consisting of a piece of polypropylene cut into a strip-like shape: a strip The filter element 13a is filled in the filter element container 20 as an oil adsorbent to form the filter element 13a corresponding to the rough processing filter element in the present invention, and at least of the fine string adsorbent and the cotton adsorbent On the other hand (in this example, an oil adsorbent 26b made of cotton processed into a cotton-like form: a cotton-like adsorbent) is filled in the filter element container 20 as an oil adsorbent and corresponds to the present processing filter element in the present invention. By configuring the filter element 13b to perform, the drain water to be treated becomes the oil-water separator 1 When the filter element 13a of a is passed, a relatively large lump of oil contained in the drain water is adsorbed and removed by the oil adsorbent 26a having a relatively large gap, and a small amount of lump oil Is processed by the oil / water separator 10b without being removed in the filter element 13a, so that the filter element 13a (oil adsorbent 26a) is prevented from being clogged in a short period of time, and the filter element is sufficiently long. In addition, when the drain water roughly treated by the oil / water separator 10a is passed through the filter element 13b of the oil / water separator 10b, a small oil content contained in the drain water can be maintained. Since the lump is adsorbed by the oil adsorbent 26b having a relatively small gap, It is possible to reliably remove the oil from the down water. Further, according to the oil / water separation system 1A and the compressed air dehumidification system S1A including the separate filter elements 13a and 13b (the rough processing filter element and the main processing filter element), the filter element for the rough processing filter element Since the filling amount of the oil adsorbent 26a and the like for the container 20 and the filling amount of the oil adsorbent 26b and the like for the filter element container 20 for the processing filter element can be separately defined as optimum amounts, By appropriately defining these according to the state of the drain water to be treated, the oil can be removed reliably and in a short time without greatly impeding the passage of the drain water.

  Further, according to the oil / water separation system 1A and the compressed air dehumidification system S1A, the nonwoven fabric 25 (sheet-like emulsion breaking material) is disposed so as to close the drain water inlet 21a in the filter element container 20. A first oil adsorbing layer filled with at least one of a sheet adsorbent and a strip adsorbent (in this example, an oil adsorbent 26a made of a piece of polypropylene cut into a strip shape: a strip adsorbent); A second oil adsorbing layer filled with at least one of a string adsorbent and a cotton adsorbent (in this example, an oil adsorbent 26b made of cotton processed into cotton: a cotton adsorbent) is used as the nonwoven fabric 25. By providing the filter element 13a in this order on the layer, it is difficult to adhere to the oil adsorbent (it is difficult to remove with the oil adsorbent). When the drain water to be treated containing water is passed through the layer of the nonwoven fabric 25, the emulsion is broken (separation of oil and moisture), so that it is possible to reliably remove the emulsified oil from the drain water to be treated. In addition, since the oil is adsorbed by the oil adsorbent 26a immediately after the emulsion breakage, it is possible to reliably remove the oil by avoiding a situation in which the oil and water whose emulsion has been broken is emulsified again. Further, according to the oil / water separation system 1A and the compressed air dehumidification system S1A, only a relatively large lump of oil is removed from the layer of the oil adsorbent 26a, and therefore, for example, the oil adsorbent 26b immediately behind the layer of the nonwoven fabric 25. Compared with the configuration in which the layer is provided, it is possible to avoid the situation where the layer of the oil adsorbent 26a is clogged in a short period of time and maintain the purification ability of the filter element 13a over a sufficiently long period of time, Oil that cannot be removed in the layer of the oil adsorbent 26a can be sufficiently removed in the layer of the oil adsorbent 26b.

  Further, according to the oil / water separation system 1A and the compressed air dehumidification system S1A, the nonwoven fabric 25 (sheet-like emulsion breaking material) is disposed so as to close the drain water inlet 21a in the filter element container 20. An oil adsorbing layer filled with at least one of a fine string adsorbent and a cotton adsorbent (in this example, an oil adsorbent 26b made of cotton processed into a cotton-like adsorbent) is formed as a layer of the nonwoven fabric 25. By providing the filter element 13b on the upper side, even when an emulsion is contained in the drain water that has been roughly treated when passing through the filter element 13a, the drain water passes through the layer of the nonwoven fabric 25. Emulsion breakage (separation of oil and water) makes it possible to reliably remove the emulsified oil from the drain water. It not only can, immediately after being emulsion breaking, since the oil by the oil sorbent 26b is absorbed, the emulsion fractured oil and moisture can be removed reliably oil to avoid a situation that emulsification again.

  Furthermore, according to the oil / water separation system 1A and the compressed air dehumidification system S1A, the emulsion breaking material is composed of an amine-based emulsion breaking material, so that the emulsified oil and water are reliably broken (separated into oil and water). )can do.

  In addition, according to the oil / water separation system 1A and the compressed air dehumidification system S1A, when both the oil / water separation devices are fixed to either the wall surface or the ceiling surface, when the drain water to be treated is raised in the housing, By forming the drain water flow path in the oil / water separator so as to pass through the treatment filter element and the main treatment filter element, the oil adsorption material 26a, 26b (or only the oil adsorption material 26b) is adsorbed. By draining the drain water in a direction in which the oil component to be removed floats in the housing 14, the oil component to be removed from the drain water is reliably attached to the oil adsorbing material 26 without being precipitated on the bottom surface of the housing 14. Can be made.

  Further, according to the oil / water separation system 1A and the compressed air dehumidification system S1A, the oil / water separation devices 10a and 10b are fixed to the outside of the side panel (in this example, the rear panel X2) in the housing 42 of the dehumidification device 3 by the fixture 18A. By fixing to the surface, the installation space below both oil-water separators 10a and 10b (that is, around the installation location of the dehumidifier 3) can be effectively utilized.

  Further, according to the oil / water separation system 1A and the compressed air dehumidification system S1A, both the oil / water separation devices 10a and 10b are fixed in the vicinity of the heat exhaust holes 42a on the outer surface of the side panel (in this example, the back panel X2). Thus, both the oil / water separators 10a and 10b can be warmed by the exhaust heat from the exhaust heat hole 42a, so that the drain water is frozen in the oil / water separators 10a and 10b when the compressed air dehumidification system S1A is used in winter. You can avoid the situation.

  The present invention is not limited to the configuration described above. For example, in the oil / water separation system 1A of the compressed air dehumidification system S1A, the oil / water separator 10 is fixed to the outer surface of the back panel X2 of the housing 42 of the dehumidifier 3 by the fixture 18A as an example of the wall surface in the present invention. However, the present invention is not limited to this. For example, a configuration in which the oil-water separator 10 is fixed to the wall surface of the building where the air compressor 2 and the dehumidifier 3 are installed by the fixing tool 18A is employed. You can also Even in such a configuration, unlike the conventional air dryer, as in the case of the oil / water separation system 1A and the compressed air dehumidification system S1A, it is not necessary to remove the housing 42 when replacing the filter element 13. As a result, the replacement work can be easily performed in a short time. Further, by attaching the both oil-water separators 10 to the wall surface, a sufficiently wide space can be secured below the both oil-water separators 10. Therefore, since the housing 14 and the filter element 13 can be easily removed from the base part 11 by simply moving the housing 14 and the filter element 13 downward with respect to the base part 11, the weight of the filter element 13 is increased by adsorbing oil or the like. It can be easily replaced even in the state. Moreover, the situation where a valuable installation space is occupied by the both oil-water separators 10 can be avoided, and the space secured below the both oil-water separators 10 can be effectively utilized.

  Moreover, the oil-water separator and the compressed air dehumidifying system according to the present invention are not limited to the configuration in which both the oil-water separator 10 is fixed to the wall surface as in the oil-water separating system 1A and the compressed air dehumidifying system S1A. For example, in the oil / water separation system 1B (another example of the oil / water separation system according to the present invention) in the compressed air dehumidification system S1B (another example of the compressed air dehumidification system according to the present invention) shown in FIG. Is adopted so as to be suspended from the ceiling surface X3 (for example, the ceiling of a building in which the compressed air dehumidification system S1B is installed) by two fixing tools 18B. In addition, about the component which has the same function as compressed air dehumidification system S1A and oil-water separation system 1A which were mentioned above in this compressed air dehumidification system S1B and oil-water separation system 1B, the same code | symbol is attached | subjected and the overlapping description is abbreviate | omitted. . In this compressed air dehumidification system S1B (oil-water separation system 1B), instead of the fixture 18A in the compressed air dehumidification system S1A (oil-water separation system 1A), the oil-water separation system 1B (both oil-water separation devices 10) is replaced with a ceiling surface X3. The two fixing tools 18B for fixing to are provided.

  In this case, the fixing tool 18B employs a configuration in which the pipe connection portion 12a of the oil / water separator 10a and the pipe connection portion 12b of the oil / water separator 10b are respectively held and fixed to the ceiling surface X3. Specifically, as shown in FIG. 9, the fixture 18B includes a U-shaped stay 31 for holding the pipe connection portion 12a (or the pipe connection portion 12b) in a tightened state, and a U-shape in a side view. A bracket 32b, a bolt 33 for fixing the U-shaped stay 31 to the bracket 32b, and a buffer material 34 (for example, an elastic resin) disposed between the pipe connecting portion 12a (12b) and the U-shaped stay 31 Or rubber). In addition, in this fixture 18B, although the piping connection part 12a (12b) is arrange | positioned under the horizontal extension part of the lower side in the bracket 32b, the structure supported by the U-shaped stay 31 etc. is employ | adopted. It is also possible to adopt a configuration in which the pipe connection portion 12a (12b) is placed above the lower horizontal extension portion in 32b and held in a state of being tightened by the U-shaped stay 31.

  In the compressed air dehumidification system S1B (oil / water separation system 1B), as described above, a configuration is adopted in which both the oil / water separation devices 10 are fixed to the ceiling surface X3 by being supported by the two fixtures 18B. For this reason, it is possible to secure a sufficient space below both the oil-water separators 10 in the same manner as the compressed air dehumidification system S1A (oil-water separation system 1A). Therefore, as shown in FIG. 8, for example, the dehumidifying device 3 can be installed below the both oil-water separators 10 to effectively use the installation space. In this case, the distance L5 in the height direction of the space secured below the both oil-water separators 10 (in this example, between the lower end of the oil-water separator 10 and the top surface X1a of the casing 42 in the dehumidifier 3). The two oil-water separators 10 are fixed to the ceiling surface X3 so that the distance is equal to or greater than 400 mm equal to the distance L4 described above, thereby maintaining the state in which the filter element 13 is attached to the base portion 11 while maintaining the housing 14 Can be easily removed from the base portion 11 by moving it downward.

  In addition, when removing the filter element 13 from the base part 11 after removing the housing 14 from the base part 11, as mentioned above, the distance L5 in the height direction in the space below the both oil-water separators 10 needs to be 400 mm or more. However, for example, in a state where the connection of the housing 14 to the base portion 11 is released and the housing 14 is slightly moved downward with respect to the base portion 11, the filter element 13 is dropped into the housing 14. In this way, the filter element 13 can be removed from the base portion 11. In the case of adopting such a removal method, as described above, it is only necessary to move the housing 14 downward until the upper end portion of the filter element 13 (for example, the outer peripheral portion of the lid body 22) can be touched. Therefore, if the distance L5 in the height direction in the space below both the oil-water separators 10 is about 100 mm, the filter element 13 can be removed from the base portion 11.

  Further, in the case where the dehumidifier 3 or the like is not installed below the both oil-water separators 10, when the both oil-water separators 10 are fixed at an excessively high position, a step or the like is required for the filter replacement work. The replacement work may be complicated. Therefore, for example, when the average height of the worker is 1.7 mm, both the oil and water are set so that the distance L1a between the upper end portion of the housing 14 and the floor surface X1 is within a range of 1.5 m ± 40 cm. By attaching the separation device 10 to the ceiling surface X3 with the fixture 18B, the housing 14 and the filter element 13 can be removed from the base portion 11 without using a step or the like.

  Thus, in the oil / water separation system 1B and the compressed air dehumidification system S1B, the oil / water separation device 10a to which the filter element 13a (coarse processing filter element) is attached and the filter element 13b (main processing filter element) are attached. The oil / water separator 10b is connected to each other via the connecting pipe 5c, and at least one of the pipe connections 12a and 12b and the base 11 in each of the oil / water separators 10a and 10b (this In the example, both the oil / water separators 10a and 10b are supported on the pipe connection part 12a of the oil / water separator 10a and the pipe connection part 12b of the oil / water separator 10b, and either the wall surface or the ceiling surface (this) In the example, there is a fixture 18B for fixing to the ceiling surface X3) of the building where the dehumidifying device 3 or the like is installed. Ri is attached.

  Therefore, according to the oil / water separation system 1B and the compressed air dehumidification system S1B, the oil / water separation device 10a, 10b is provided with two oils and foreign matters that cannot be completely removed by the filter element 13a of the oil / water separation device 10a. The filter element 13b of the separation device 10b can be surely removed, and unlike the conventional air dryer, when the filter elements 13a and 13b are replaced, the work such as removing the housing 42 of the dehumidifying device 3 or the separation device main body (this example) Then, the work of removing the base portion 11 and the like can be made unnecessary, so that the replacement work can be easily performed in a short time. Further, according to the oil / water separation system 1B and the compressed air dehumidification system S1B, both the oil / water separation devices 10 are attached to the ceiling surface X3 (in this example, the ceiling surface X3 of the building where the dehumidification device 3 and the like are installed). A sufficiently wide space can be secured below the oil-water separators 10a and 10b. Therefore, since the housing 14 and the filter elements 13a and 13b can be easily detached from the base portion 11 simply by moving the housing 14 and the filter elements 13a and 13b downward with respect to the base portion 11, the oil / water separation system 1B and the compressed air dehumidification system S1B can be used. Accordingly, it is possible to easily replace the filter element 13a, 13b even when the weight of the filter element 13a, 13b is increased by adsorbing oil or the like. Moreover, the situation where valuable installation space is occupied by both oil-water separators 10a, 10b can be avoided, and the space secured under both oil-water separators 10a, 10b can be effectively utilized.

  Moreover, in said compressed air dehumidification system S1A, S1B (oil-water separation system 1A, 1B), although the structure which attached fixing tool 18A, 18B to the pipe connection part 12a, 12b is employ | adopted, this invention is limited to this. Instead, it is also possible to adopt a configuration in which fixing members corresponding to the fixing members 18A and 18B are attached to the base portion 11 and fixed to the wall surface or the ceiling surface X3. In addition, in the above example, the drain water supplied from the air compressor 2 or the dehumidifier 3 is separated as drain water to be treated in the present invention, but the present invention is not limited to this. For example, the drain water (condensation water) generated in the compressed air supply pipe 4a between the air compressor 2 and the dehumidifier 3 and the compressed air supply pipe 4b between the dehumidifier 3 and the supply target is separated. It is possible to adopt a configuration in which the drain water supply pipe 5a is connected so as to be supplied to the compressed air dehumidification systems S1A and S1B.

It is a block diagram which shows the structure of compressed air dehumidification system S1A (S1B). It is a side view of oil-water separation system 1A and dehumidifier 3 in compressed air dehumidification system S1A. It is an external view which shows the front of the oil-water separation system 1A in compressed air dehumidification system S1A, and the back surface of the dehumidification apparatus 3. FIG. It is a top view of oil-water separation system 1A and dehumidifier 3 in compressed air dehumidification system S1A. It is sectional drawing which shows the structure of the oil-water separator 10a. It is sectional drawing which shows the structure of the oil-water separator 10b. It is a side view of the fixture 18A in the oil-water separation system 1A. It is a front view of oil-water separation system 1B and dehumidification apparatus 3 in compressed air dehumidification system S1B. It is a side view of the fixing tool 18B in the oil-water separation system 1B.

Explanation of symbols

S1A, S1B Compressed air dehumidification system 1A, 1B Oil-water separation system 2 Air compressor 3 Dehumidifier 4a, 4b Compressed air supply pipe 5a Drain water supply pipe 5b Drain water discharge pipe 5c Connection pipe 10a, 10b Oil / water separator 11 Base portion 12a, 12b Pipe connection portion 13a, 13b Filter element 14 Housing 18A, 18B Fixture 25 Non-woven fabric 26a, 26b Oil adsorbent 31 Stay 32a, 32b Bracket 33 Bolt 34 Buffer material 42 Housing 42a Heat exhaust hole L1-L5 L1a Distance X1 Floor X1a Top panel X2 Rear panel X3 Ceiling

Claims (9)

A first pipe connecting part for connecting a supply side pipe for supplying drain water to be treated, a second pipe connecting part for connecting a discharge side pipe for discharging drain water that has been treated, and a cylinder A filter element filled with an oil adsorbent in a filter element container, and the first pipe connection part and the second pipe connection part are connected to each other and the filter element is detachably mounted. A base portion and a bottomed cylindrical housing that is detachably attached to the base portion so as to cover the filter element attached to the base portion, and is supplied via the supply-side piping. Further, the drain water is introduced from the first pipe connection portion, passed through the filter element, and then discharged from the second pipe connection portion to the discharge side pipe. One oil-water separator is provided with a connection pipe corresponding to the discharge-side pipe for one oil-water separator and the supply-side pipe for the other oil-water separator while having a pair of water separators An oil / water separator system in which the second pipe connection part in the first oil pipe and the first pipe connection part in the other oil / water separator are connected to each other,
The rough processing filter element as the filter element is attached to the one oil-water separator, the main filter element as the filter element is attached to the other oil-water separator, and each of the first oil-water separators At least one of the pipe connection portion, each of the second pipe connection portions, and each of the base portions is configured to support the oil / water separator and fix it to either the wall surface or the ceiling surface. Oil-water separation system with a fixture attached. The rough processing filter element is configured such that at least one of a sheet-shaped adsorbent as the oil adsorbent and a strip-shaped adsorbent as the oil adsorbent is filled in the filter element container,
The filter element for main processing is configured by filling at least one of a fine string-like adsorbent as the oil adsorbent and a cotton-like adsorbent as the oil adsorbent into the filter element container. The oil-water separation system according to 1.   In the rough processing filter element, a sheet-like emulsion breaking material is disposed so as to close an inflow port through which the drain water to be treated flows into the filter element container, and the sheet-like adsorbing material And the first oil adsorbing layer filled with at least one of the strip adsorbents, and the second oil adsorbing layer filled with at least one of the fine string adsorbent and the cotton adsorbent. The oil-water separation system according to claim 2, wherein the oil-water separation system is provided in this order.   The main processing filter element has a sheet-like emulsion breaking material disposed so as to close an inflow port through which the drain water to be treated flows into the filter element container. The oil-water separation system according to claim 2 or 3, wherein an oil adsorbing layer filled with at least one of the fine string adsorbent and the cotton adsorbent is provided.   The oil-water separation system according to claim 3 or 4, wherein the emulsion breaking material is composed of an amine-based emulsion breaking material.   In the state where both the oil / water separators are fixed to either the wall surface or the ceiling surface, the rough processing filter element and the main processing filter element are formed when the drain water to be processed is raised in the housing. The oil / water separation system according to claim 1, wherein the flow path of the drain water is formed in the oil / water separator so as to pass through the inside.   A compression apparatus comprising: the oil / water separation system according to any one of claims 1 to 6; and a dehumidifying device that removes and discharges moisture in the compressed air and discharges the removed moisture as drain water to be treated. Air dehumidification system.   The compressed water dehumidification system according to claim 7, wherein the oil / water separation system is fixed to an outer surface of a side panel in a housing of the dehumidifier by the fixture.   The compressed-air dehumidification system according to claim 8, wherein the oil-water separation system has the oil-water separation device fixed in the vicinity of a heat exhaust hole on an outer surface of the side panel.

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