JP4382955B2 - Air dryer with oil / water separator - Google Patents

Description

[0001]
【Technical field】
The present invention relates to equipment for purifying waste water in an air dryer apparatus for removing moisture and the like in compressed air.
[0002]
[Prior art]
In order to remove moisture, solids, oil mist, and the like in high-temperature compressed air compressed by an air compressor, an air dryer is used that condenses compressed air by exchanging heat with a refrigerant. An air dryer generally has a refrigerant pipe including a refrigerant compressor, a condenser, and a cooler, and an air pipe, and generates a drain in the cooler. Drain generated by an air compressor or an air dryer is sent to an oil / water separator, where it is separated into oil and water for processing.
[0003]
[Problems to be solved by the invention]
Air dryers are used as environmental equipment that can remove contaminants in compressed air and supply clean air, but the problem is that dirty drains containing oil are discharged from drain traps. It was. Conventionally, an oil / water separator is provided independently to remove oil, but when these costs are added, the cost becomes high, and it is necessary to perform drain piping at the time of installation on the site, which also increases the installation cost. Furthermore, a large installation space is required.
Conventionally, there is an example in which an air compressor and an air dryer are housed in one housing (Actual 4-50472), but the oil / water separator is provided independently on the outside of the housing. SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an air dryer with an oil / water separator that solves the above-mentioned problems, does not discharge harmful substances outside the housing, reduces installation costs and labor, and saves installation space.
Another object of the present invention is to effectively use the exhaust heat of the air compressor and the air dryer.
[0004]
[Means for Solving the Problems]
The invention according to claim 1 is characterized in that an air dryer, a drain trap and an oil / water separator connected to a drain discharge pipe of the air dryer, and a pipe interconnecting them are built in the same casing. The above problem is solved by an air dryer with a separation device.
The invention according to claim 2 is characterized in that the casing is divided into upper and lower stages, an air dryer is provided in the upper stage, and a drain trap and an oil / water separator are provided in the lower stage, respectively. In particular, the problem of the installation space is solved.
[0005]
According to a third aspect of the present invention, there is provided an air dryer, an air compressor connected to an air suction port of the air dryer, an oil / water separator connected to a drain discharge pipe of the air dryer and the air compressor, and an oil / water separator Another device that solves the above-described problems is provided by an air dryer with an oil / water separator, wherein a drain trap connected to the downstream side and a pipe that connects them are installed in the same housing.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, specific embodiments of the present invention will be described with reference to FIGS. In each figure, the front case side plate is omitted.
[0007]
[Example 1]
FIG. 1 is an elevational view showing a first embodiment of an air dryer with an oil / water separator according to the present invention. In the figure, reference numeral 1 denotes a stainless steel housing, which is divided into an upper stage 1a and a lower stage 1b by a floor plate 2. The floor plate 2 only needs to be able to hold the upper apparatus, and it is not always necessary to completely partition the upper and lower chambers.
[0008]
In the upper stage, a known air dryer 3 causes hot compressed air introduced from an intake pipe (not shown) and refrigerant to exchange heat with a cooler 3a to condense moisture and the like, and then discharge clean, dry air from an exhaust pipe 3b. . The drain discharge pipe of the cooler 3a is connected to a known oil / water separator 4 installed at the lower stage. The oil / water separator 4 is filled with, for example, an oil treatment material having a lipophilic property and a hydrophilic property and also having an oil adsorbing property, for example, a fibrous adsorbing material. By passing drain water therethrough, oil fine particles in the oil emulsion are coarsened. It has the function of separating oil and water and adsorbing and removing the separated oil. There are two types of drain water feeding methods: a pressure feeding type and a self-weighting type. In this embodiment, a pressure feeding type is used. A drain trap 5 is connected to the downstream side of the oil / water separator.
[0009]
The drain generated in the air dryer is pumped through the drain pipe in the housing 1 and flows into the oil / water separator 4 to remove the oil, and the remaining drain water passes through the drain trap 5 from the discharge port of the oil / water separator 4. It flows down and is discharged as clean treated water from the outlet at the bottom of the housing 1. In this embodiment, the pressure inside the oil / water separator 2 becomes high, so that a pressure vessel needs to be used, which increases the cost. However, since the oil does not pass through the drain trap 5, there is an advantage that the trap is less likely to fail. Although various types of drain traps can be used, it is preferable to use an electromagnetic type that is less likely to cause a malfunction even if the drain is sent so that the inside of the drain trap is always filled.
[0010]
In the present embodiment, the air dryer 3 is installed in the upper stage of the casing 1 and the oil / water separator 4 and the drain trap 5 are installed in the lower stage of the casing 1. However, the present invention is not limited to this. The air dryer 2 can also be installed in the lower stage. Since the position of the device and the piping in the casing is adjusted to the optimum state at the time of shipment from the factory, the installation work at the site only needs to be carried by transporting the casing.
[0011]
[Example 2]
FIG. 2 shows a second embodiment of an air dryer with an oil / water separator according to the present invention. As in Example 1, the air dryer 3 is installed in the upper stage, and the oil / water separator 4 is installed in the lower stage. In this example, the drain pipe of the cooler 3a is first connected to the drain trap 5 installed in the upper part of the lower stage. Later, it is connected to the inlet of the oil / water separator 4. The drain trap 5 may be any of an electromagnetic type, a float type, and a disk type. An infrared checker 6 is interposed in the discharge pipe of the oil / water separator 4. The infrared checker 6 is a water quality monitoring device using an infrared light emitting / receiving element, and is connected to a control device 7 at the upper part of the housing 1 through an electrical wiring outside the housing 1. The control device 7 supplies constant power to the light emitting element, calculates the turbidity of the sample water in the container based on the amount of current output from the light receiving element, and warns the deterioration of water quality by light, sound, or the like. . The downstream side of the infrared checker is connected to the outlet at the bottom of the housing 1.
[0012]
In this embodiment, the drain water discharged from the cooler 3a is discharged to the oil / water separator 4 after being discharged by the drain trap 5 and is discharged after being treated by the oil / water separator 4. The feature of the configuration of the present embodiment is the reverse of that of the first embodiment. Since the inflow of drain water to the oil / water separator 4 is controlled, a stable oil adsorption process can be performed and the use of a pressure vessel is not necessary, but the drain trap 5 Since drain water before treatment passes, maintenance management of the drain trap is important.
[0013]
[Example 3]
FIG. 3 is an elevational view showing a third embodiment in which an air compressor is further provided in the same housing. In the present embodiment, an air compressor 8 is installed in the lower stage, and is connected to the air inlet of the upper air dryer 3 via a pipe (not shown). The type of the air compressor 8 may be any of a reciprocating type, a screw type, and a turbo type. Drain traps 5, 5 and check valves 9, 9 are connected to the drain discharge ports of the air dryer 3 and the air compressor 8, respectively, and then merged and installed in the side of the air compressor 8. 4 is connected.
[0014]
The drain water discharged from the air dryer 3 and the air compressor 8 is temporarily stored in a drain trap and then introduced into the oil / water separator 4. The check valves 9 and 9 prevent the backflow of drain water due to the difference in exhaust pressure between the air dryer 3 and the air compressor 8. The drain water treated by the oil / water separator 4 is discharged from the left outlet. In this embodiment, the drains of the air dryer 3 and the air compressor 8 can be treated in common, and a single oil / water separator that has been provided separately so far is economically advantageous.
[0015]
[Example 4]
FIG. 4 shows a fourth embodiment in which the prime mover part 8a of the air compressor 8 is provided in the upper stage of the casing and the compressor part 8b is provided in the lower stage of the casing. As in the third embodiment, drain traps 5 and 5 and check valves 9 and 9 are connected to the drain outlets of the air dryer 3 and the air compressor 8, respectively. The separator 4 is connected. The drain discharged from the air dryer 3 and the air compressor 8 is processed by a single oil / water separator 4. Compared to the apparatus of the third embodiment, there is an advantage that the casing can be further reduced in size.
[0016]
[Example 5]
FIG. 5 shows an air dryer with an oil / water separator in which the air compressor is housed in the same casing, and a common floor plate 2 is not provided, and the air compressor 8, the air dryer 3 and the oil / water separator 4 are juxtaposed on the same surface. An example is shown. The oil / water separator 4 is connected to a drain outlet of the air dryer 3 and the air compressor 8, and an electromagnetic drain trap 5 is connected to the downstream side of the oil / water separator 4. The effect of installing the drain trap 5 on the downstream side of the processing apparatus is the same as that of the first embodiment. Similar to the fourth embodiment, there is an advantage that the housing can be downsized, and in particular, the height can be suppressed.
[0017]
【effect】
The air dryer with an oil / water separator according to the present invention has a smaller installation space than the conventional separation type, and since the position adjustment and piping have already been completed, there is less risk of failure and is a highly reliable device. Can be provided. Therefore, it can be a useful clean device that can guarantee the supply of clean air that does not contain moisture, solids, and oil, and clean drainage that does not contain oil.
In cold regions, the drain water in the oil / water separator may freeze in the winter, and thus an electric heater has been provided so far, but in the present invention, the oil / water separator is provided with the air dryer 1 or the air compressor 8. Since it is provided in the same housing, it can maintain the exhaust heat of these devices to some extent to prevent freezing, and there is an advantage that the necessity of providing a heat retaining device is reduced.
[Brief description of the drawings]
FIG. 1 is an elevational view of an air dryer with an oil / water separator of Example 1. FIG.
FIG. 2 is an elevational view of an air dryer with an oil / water separator according to a second embodiment.
FIG. 3 is an elevational view of an air dryer with an oil / water separator according to a third embodiment.
4 is an elevational view of an air dryer with an oil / water separator according to Embodiment 4. FIG.
5 is an elevational view of an air dryer with an oil / water separator according to Embodiment 5. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Case 1a Upper stage 1b Lower stage 2 Floor board 3 Air dryer 4 Oil-water separator 5 Drain trap

Claims (3)

An air dryer, an oil / water separator connected to the drain discharge pipe of the air dryer, a drain trap connected to the downstream side of the oil / water separator, and a pipe connecting them are installed in the same housing. Air dryer with oil / water separator. 2. The air dryer with an oil / water separator according to claim 1, wherein the casing is divided into upper and lower stages, an air dryer is installed in the upper part, and a drain trap and an oil / water separator are installed in the lower part. An air dryer, an air compressor connected to an air inlet of the air dryer, an oil / water separator connected to a drain discharge pipe of the air dryer and the air compressor, and a drain trap connected to a downstream side of the oil / water separator And an air dryer with an oil / water separator, wherein the pipe connecting them is installed in the same housing.

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