JP3538342B2 - Oil-water separator for compressed air discharge drain - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for separating oil and water from drains discharged from a compressed air dehumidifier, and is configured to discharge purified water using compressed air. .

[0002]

2. Description of the Related Art As a conventional apparatus of this type, an apparatus in which drain water discharged from a compressed air processing apparatus such as an air compressor is discharged at a constant rate by an electromagnetic drain trap or a float type drain trap is used as an oil-water separator. And then drained after treatment with the oil-water separator (Japanese Utility Model Laid-Open No. 6-53788).

[0003]

However, in the conventional apparatus, there is an inconvenience that, once stored in the drain trap, the drain trap is liable to break down due to factors such as oil in the drain drainage and dust. A drain pipe such as a drain collecting pipe is required to collect drain water discharged from a plurality of compressed air treatment devices into one oil / water separator.
Further, the oil-water separator and the compressed air dehumidifier must be manufactured separately, and there is a problem from the viewpoint of space saving of the device. Therefore, the present invention has been made in view of the drawbacks of the prior art, and the drain trap is less likely to be broken down by dust and oil, and piping work such as a drain collecting pipe is not required, and integration with an oil-water separation device is possible. It is intended to provide a device.

[0004]

SUMMARY OF THE INVENTION Namely, the present invention, compressed air dehumidifier, air compressor, and oil-water separator connected to the drain pipe of the apparatus using the compressed air such as an air tank, oil-water separation device above the It consists of a drain discharge mechanism including a solenoid valve and a disc type connected to the discharge port,
The oil-water separation apparatus, a closed pressure vessel having a drain water inlet and outlet, reservoir drainage under side of the container is partitioned adsorption layer and the upper intermediate portion and space balloon drain, intermediate portion adsorbent The drain water collected under the separation device by the opening and closing operation of the drain discharge mechanism installed at the upper discharge port is drained after being subjected to the adsorption treatment in the adsorption layer. This object is achieved by an oil-water separator for the compressed air discharge drain. The invention according to claim 2 is characterized in that the opening / closing operation of the drain discharge mechanism is performed under a pressure capacity.
Height of the water level sensor installed in the drain pool below the vessel
It is released when it accumulates above, and after a lapse of a predetermined time after opening
It is an oil-water separation device for a compressed air discharge drain configured to be closed . The invention according to claim 3 is characterized in that the adsorbent layer made of the adsorbent has a partition plate having a hole for drain water passage at the center and a partition plate having a plurality of small holes for drain water passage outside the center. And an oil / water separator for compressed air discharge drain, wherein the oil / water separator is partitioned by a predetermined interval.

[0005]

[Action] In the device according to the present invention is connected to a compressed air treatment system and ported to drain water, under the oil-water separator drain is made of compressed container by its own weight under the same pressure
To the drain pool. Then, the drain discharge mechanism connected to the discharge port of the separation device is opened. Then, since the pressure of the compressed air processing unit is higher than the atmospheric pressure , the drain collected under the oil-water separator is filled in the middle part of the sealed pressure vessel.
Blowing out of the pressure vessel through the packed adsorption layer,
It is discharged outside through a discharge port and a drain discharge mechanism. When the drain is discharged, only the compressed air blows out from the discharge port, leading to a decrease in the pressure in the compressed air processing device. Therefore, the drain discharge mechanism is closed to the extent that some drain remains in the drain discharge mechanism. Once closed, the oil / water separator is again placed under the same pressure as the compressed air treatment unit,
Drain water attached to the adsorption layer also falls into the drain pool by its own weight. Drain water discharged from the compressed air processing device also flows into the drain reservoir below the pressure vessel through the drain outlet again by its own weight. Then, when the drain water accumulates above a certain level, the drain discharge mechanism is opened again, and the drain water is discharged to the outside. By repeating such an operation, the drain water in the drain reservoir is gradually discharged to the outside while the oil is adsorbed by the adsorbent in the separation device.

According to the second aspect of the present invention, the drain discharge mechanism has a structure for detecting the amount of drain water stored in the bottom of the pressure vessel, and a water level sensor is provided in the pressure vessel drain reservoir, and the water level is detected. The drain trap, which is the drain discharge mechanism, is opened by detecting that a predetermined amount of drain water has accumulated by the sensor, and the drain trap is closed after a lapse of a predetermined time after opening. The drain water thus collected is discharged to the outside without accumulating more than a predetermined amount and without flowing back to the compressed air processing device because it is placed under the same pressure.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the illustrated embodiments. In FIG. 1, reference numeral 1 denotes a compressed air treatment device such as an air compressor, a compressed air dehumidifier, or an air tank.
And a compressed air outlet 3, and a drain outlet 4 for draining drain water generated in the apparatus is provided below. Below the outlet 4 of the compressed air treatment device 1, a closed type oil / water separation device 5 according to the present invention is installed.

A discharge port 6 of the oil / water separator is provided above the closed type oil / water separator 5, and is connected to an inlet of an electromagnetic drain trap 7 as a drain discharge mechanism via a pipe (not shown). As shown in FIG. 2, the closed type oil / water separation device 5 is composed of a pressure vessel 10 joined so as to be able to be divided into two via a flange joint 8, and the inside of the pressure vessel 10, a lower drain reservoir 12, an intermediate adsorption layer 14, The adsorbent layer 14 is divided into an upper drain discharge space 16 and the adsorbent layer 14 is alternately partitioned at predetermined intervals via partition plates 15a and 15b shown in FIG. 3, and the separated spaces are filled with adsorbents 18, respectively. . The partition plate 15a has a hole for drain water passage at the center, and the partition plate 15b has a plurality of small drain water passage holes outside the center. 7a, 7 in the figure
b denotes an inlet and an outlet of the electromagnetic drain trap, respectively.

FIG. 4 shows a specific second embodiment of the apparatus according to the present invention. In FIG. 4, reference numeral 1a denotes an apparatus in which an evaporator 20 of a refrigeration cycle is installed and precooled through a precooling circuit 22. This is a compressed air dehumidifier configured to efficiently cool air and allow the drain water condensed below the dew point to flow downward in the drawing. The drain water discharged by the device 1a is supplied to the discharge port 4 and a pipe (FIG. (Not shown)
from the drain inlet 5a below the oil-water separator 5 installed below the drainage pool 12 of the pressure vessel 5 by its own weight.
It has a structure that accumulates in.

Similarly, reference numeral 1b denotes a dustproof filter device for compressed air. Compressed air flowing from a compressed air inlet 2 of the filter device 1b flows in through a central hole, and a cylindrical filter 24 in the filter device 1b. Is discharged from the compressed air outlet 3 after the dustproofing is removed via a drain. A drain discharge port 4 is provided below the apparatus 1b, and the oil-water separation located below the discharge port 4 is performed. Under the same pressure toward the device 5, the structure is such that it is stored in a drain pool 12 below the pressure vessel 5 by its own weight.

In the drain reservoir 12 below the pressure vessel 5, a water level sensor 26 connected to a control device of the electromagnetic drain trap 7 is installed above the reservoir 12. In the present embodiment, a timer is installed in the control device in the drain trap 7, and the amount of drain stored in the drain reservoir 12 and the drainage time of the drain measured in advance are input. The sensor 26 is configured to open the valve of the electromagnetic drain trap 7 after confirming that the drain water is present at a predetermined level or higher, and to close the valve by operating a timer after a predetermined time has elapsed after the opening. I have.

In this embodiment, the opening and closing of the valve of the electromagnetic drain trap 7 has been described with reference to the embodiment shown in FIG. 4, but the invention is not limited to this. Around (A) and drain inlet 5a of oil-water separator 5
An electromagnetic type, a condenser type, and an electric type water level sensor are provided in the vicinity (B), respectively. The sensor in the vicinity of A detects the water level, and then the valve of the electromagnetic drain trap 7 is opened. The valve of the trap 7 may be closed after a predetermined time from the detection of the absence of water. It is also possible to use a timer-type electromagnetic drain trap or a disk-type drain trap that opens for a predetermined time at predetermined time intervals. Further, the compressed air processing device 1a, shown in FIG.
1b, two devices 1b were installed. However, these devices 1
It is desirable that a and 1b be configured to be connected to separate oil / water separation devices 5, respectively. Further, the partition plate 15
Although the configuration having two types, a and 15b, has been described as an example, it is also possible to use one type of partition plate having many small holes. In the present embodiment, the drain inlet 5a and the outlet 6 of the pressure vessel are configured so that the former is on the lower side and the latter is on the upper side, but these can be reversed.

In the apparatus according to the present embodiment, the oil / water separator 5 is constituted by a closed container 10 so that when the valve of the electromagnetic drain trap 7 is closed, the compressed air treatment apparatus is not used. 1 and the oil-water separator 5 are under the same pressure, and the drain water is stored in the drain pool 12 of the oil-water separator 5 below by its own weight. Thus, when a predetermined amount or more of the drain is accumulated in the drain reservoir 12, the sensor 26 detects the drain and the valve of the electromagnetic drain trap 7 is opened in accordance with an instruction from the internal control device. Drain trap 7
Is opened, the pressure near the outlet 6 of the oil / water separator 5 is lower than that of the compressed air treatment device 1, so that the drain water is located below the pressure vessel 5 but flows in through the drain water inlet 5a. As a result, the compressed air is blown upward.

In this embodiment, the partition plates 15 are
The presence of the partition plates 15a having holes in the center at predetermined intervals and the partition plates 15b having holes in the peripheral portion alternately causes drain water to uniformly contact the adsorbent 18 between the partition plates 15a and 15b, so that oil is efficiently removed. After being blown out to the blowing space 16 in the state of being adsorbed, the air is discharged to the outside via the outlet 6 of the pressure vessel 5 and the drain trap 7. Also, the controller detects whether the drain water has been sufficiently discharged,
When the valve of the drain trap 7 is closed, the discharge of the drain water is stopped and attempts to return downward. However, in the apparatus according to the present embodiment, the adsorbent 18 is filled in the adsorbent layer 14 so that the adsorbent 18 is rapidly filled. The reversion phenomenon is buffered, and the phenomenon that the drain water returns in the compressed air treatment device 1 is prevented.

The oil-water separation device 5 according to the present embodiment
Although it is composed of the closed container 10, since it is configured to be able to be divided into two via the flange joint 8, when the adsorbent 18 falls into a clogged state, the partition plate 15a, The adsorbent 18 can be easily replaced while removing the 15b.

[0016]

As described above, the oil / water separation device for the compressed air discharge drain according to the present invention does not require a drain trap near the discharge port of the compressed air treatment device as in the conventional device, and is directly connected via a pipe. Since the connection is made, the apparatus can be integrated, and no extra plumbing facility work is required as in the related art. Since the drain discharge mechanism is connected near the discharge port of the oil-water separator, it is extremely rare for the drain trap itself to become clogged with oil or dust, thereby improving the reliability of the device. In addition, when a solenoid valve is used, the opening and closing operation of the trap can be freely adjusted. Because of the structure that blows compressed air through the adsorbent in the oil-water separator, the return of drain water when the trap is closed can be suppressed, and adverse effects such as drain water blowing out to the compressed air treatment device can be suppressed. Absent.

[Brief description of the drawings]

FIG. 1 is a schematic view showing an outline of an apparatus according to the present invention.

FIG. 2 is a longitudinal sectional view of an oil / water separation device showing a first embodiment of the device according to the present invention.

FIG. 3 is a plan view showing a structure of a partition plate mounted in the oil-water separator.

FIG. 4 is a schematic vertical sectional view of the device according to a second embodiment of the present invention (when a water level sensor is installed).

[Explanation of symbols]

1 compressed air treatment equipment 1a Compressed air dehumidifier 1b Dustproof filter device for compressed air 2 Compressed air inlet 3 Compressed air outlet 4 Drain outlet 5 Oil / water separator 6 outlet 7 Electromagnetic drain trap 8 Flange joint 10 Pressure vessel 12 drain pool 14 Adsorption layer 15a, 15b Partition plate 16 balloon space 18 Adsorbent 20 evaporator 22 Pre-cooling circuit 24 filters 26 Water level sensor

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) C02F 1/28 B01D 17/00

Claims (3)

(57) [Claims] An oil / water separator connected to a drain pipe of a device using compressed air, such as a compressed air dehumidifier, an air compressor, or an air tank, and a solenoid valve connected to a discharge port above the oil / water separator. consists of a drain discharge mechanism including the disk type, the oil-water separation apparatus, a closed pressure vessel having a drain water inlet and outlet, reservoir drainage under side within said vessel, balloon drained adsorbent layer and the upper intermediate portion is partitioned into a space made that the intermediate portion is filled with adsorbent, the drain water accumulated in the lower side of the separation device by the opening and closing operation of the installed drainage mechanism to the discharge port, is adsorption treatment in the adsorption layer An oil / water separator for a compressed air discharge drain configured to be drained after being drained. 2. A compressed air dehumidifier, an air compressor
-, Drain of equipment using compressed air such as air tank
An oil / water separator connected to the pipe, and an oil / water separator above the oil / water separator.
Drain drain including solenoid valve and disc type connected to the outlet
The oil-water separation device has a drain water inlet and a drain.
A sealed pressure vessel and a drain pool in the lower part of the vessel,
Section is divided into an adsorbent layer and the upper
The middle part is filled with adsorbent, and the drain
By the opening and closing operation of the discharge mechanism
Drain water is drained after being adsorbed by the adsorbent layer.
In such a configuration, the opening / closing operation of the drain discharge mechanism is opened when the water accumulates above the level of a water level sensor provided in the drain water sump below the pressure vessel, and is closed after a predetermined time elapses after the opening. Oil-water separator for compressed air discharge drain configured as described above. 3. An adsorbent layer comprising the adsorbent is drained at the center.
And a partition plate with holes for water passage
With multiple small holes for drain water passage
It is characterized by being divided at predetermined intervals alternately via a plate
The oil-water separation device for a compressed air discharge drain according to claim 1,
Place .