JP2001259346A - Air dryer with oil-water separator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To decrease the installation time and cost of an air-water separator that is conventionally installed so as to be separated from an air compressor and an air dryer, and improve space utilization, and to prevent drain water from being frozen in cold districts. SOLUTION: The case of the air dryer is divided into upper and lower parts. The air dryer is mounted in the upper part, and the oil-water separator, a drain trap, and an infrared checker are mounted in the lower part. The drain generated in the dryer is forcibly fed through a drain pipe in the case to flow into the oil-water separator, and oil is removed in the separator. The remaining drain water is made to flow down from the outlet of the oil-water separator through the drain trap and then is discharged as clean treated water from the outlet at the lower part of the case.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an equipment for purifying waste water in an air dryer for removing moisture and the like in compressed air.

[0002]

2. Description of the Related Art In order to remove moisture, solid matter, oil mist, and the like in high-temperature compressed air compressed by an air compressor,
An air dryer that condenses compressed air by exchanging heat with a refrigerant in a cooler is used. 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]

An air dryer is used as an environmental device capable of removing contaminants from compressed air and supplying clean air. However, an air-dried dirty drain containing oil is discharged from a drain trap. The point of emission was an issue. Conventionally, an oil-water separator was provided independently to remove oil. However, adding these equipment costs would increase the cost, and it would be necessary to perform drain piping when installing on-site, and installation costs would be high. Furthermore, a large installation space is required. There has been an example in which an air compressor and an air dryer are housed in a single housing.
0472), the oil / water separator was provided independently outside the housing. Therefore, 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 to the outside of the housing, reduces installation costs and labor, and saves installation space. Another object of the present invention is to make effective use of exhaust heat of an air compressor and an air dryer.

[0004]

According to the first aspect of the present invention,
An air dryer, a drain trap and an oil / water separator connected to a drain discharge pipe of the air dryer, and a pipe for interconnecting the drain trap and the oil / water separator are built in the same housing. Solve the problem. The invention according to claim 2 is characterized in that the housing is divided into upper and lower stages, an air dryer is provided in an upper stage, and a drain trap and an oil / water separator are provided in a lower stage, respectively. In particular, the problem of the installation space is solved.

According to a third aspect of the present invention, there is provided an air dryer,
A drain trap connected to a drain discharge pipe of the air dryer, an oil / water separator connected downstream of the drain trap, a water quality monitoring device connected downstream of the oil / water separator, and a pipe connecting these. The above-mentioned problem is solved by an air dryer with an oil-water separation device, characterized by being installed in the same housing. According to a fourth aspect of the present invention, an air dryer, an air compressor connected to an air suction port of the air dryer, and a drain discharge pipe of the air dryer and the air compressor are connected via a drain trap and a check valve, respectively. Another device for solving the above-mentioned problem is provided by an air dryer with an oil-water separator, wherein the oil-water separator and a pipe connecting the oil-water separator are installed in the same housing. The invention according to claim 5 includes 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, a drain trap connected to a downstream side of the oil / water separator, and a pipe connecting these are installed in the same housing. Another device for solving the above-mentioned problem is provided by an air dryer with an oil-water separation device.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a specific embodiment of the present invention will be described with reference to FIGS. In each of the drawings, the front housing side plate is omitted.

[0007]

Embodiment 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. 1 in the figure
Is a housing made of stainless steel, and an upper stage 1a is
And the lower stage 1b. The floor plate 2 only needs to be able to hold the upper device, and it is not always necessary to completely separate the upper and lower chambers.

In the upper stage, a known air dryer 3 exchanges heat between high-temperature compressed air introduced from an intake pipe (not shown) and a refrigerant in a cooler 3a to condense moisture and the like, and outputs dried clean air to a discharge pipe 3b. Discharged from 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 an oil treating material having oil-adsorbing properties, such as lipophilicity and hydrophilicity, for example, a fibrous adsorbent, and by passing drain water therethrough, coarse oil 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 system: a pressure feeding type and a self-weighting type. In this embodiment, the pressure feeding type is used. The drain trap 5 is connected to the downstream side of the oil-water separator.

The drain generated by the air dryer is
The drain pipe inside is pumped into the oil / water separator 4 to remove oil, and the remaining drain water flows down from the outlet of the oil / water separator 4 through the drain trap 5 to the lower outlet of the housing 1. Discharged as cleaner treated water. In this embodiment, since the pressure in the oil-water separator 2 is high, it is necessary to use a pressure vessel to increase the cost.
There is an advantage that the trap does not easily break down because the oil does not pass through. Although various types of drain traps 5 can be used, it is preferable to use an electromagnetic type that is less likely to malfunction even if the drain is sent so that the inside of the drain trap is always full.

In this embodiment, the air dryer 3 is installed on the upper stage of the housing 1, and the oil / water separator 4 and the drain trap 5 are installed on the lower stage of the housing 1. However, the present invention is not limited to this. Alternatively, the air dryer 2 can be installed on the lower stage. Since the positions of the devices and the pipes in the housing are adjusted to an optimum state at the time of shipment from the factory, the installation work on the site only needs to transport and install the housing.

[0011]

Embodiment 2 FIG. 2 shows a second embodiment of the air dryer with an oil / water separator according to the present invention. As in the first embodiment, the air dryer 3 is installed in the upper stage and the oil / water separator 4 is installed in the lower stage. In this embodiment, the drain pipe of the cooler 3a is first connected to the drain trap 5 installed in the upper part of the lower stage. It is later 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 the control device 7 on the upper part of the housing 1 via electric wiring outside the housing 1.
The control device 7 supplies constant power to the light emitting element and calculates the turbidity of the sample water in the container based on the amount of current output from the light receiving element,
Warning by sound. The downstream side of the infrared checker is connected to an outlet at the lower part of the housing 1.

In this embodiment, the drain water discharged from the cooler 3a is discharged to the drain trap 5 at a constant rate, collected in the oil / water separator 4, treated by the oil / water separator 4, and then drained. The feature of the configuration of this embodiment is opposite to that of the first embodiment. Since the inflow of drain water into the oil-water separator 4 is controlled, stable oil adsorption processing can be performed and there is no need to use a pressure-resistant container. Drain water before treatment passes, so maintenance of the drain trap is important.

[0013]

Embodiment 3 FIG. 3 is an elevational view showing a third embodiment in which an air compressor is further provided in the same housing. In this embodiment, an air compressor 8 is installed at the lower stage, and is connected to an 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 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. 4 is connected.

The drain water discharged from the air dryer 3 and the air compressor 8 is temporarily stored in a drain trap,
It is introduced into the oil-water separator 4. The check valves 9 and 9 prevent the drain water from flowing backward due to a 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 drain of the air dryer 3 and the drain of the air compressor 8 can be processed in common, and only one oil / water separation device which has been separately provided so far is economically advantageous.

[0015]

Fourth Embodiment FIG. 4 shows a fourth embodiment in which a prime mover portion 8a of an air compressor 8 is provided in an upper stage of a housing and a compressor portion 8b is provided in a lower stage of the housing. As in the third embodiment, the drain outlets of the air dryer 3 and the air compressor 8 are connected to drain traps 5, 5 and check valves 9, 9, respectively. It is connected to the separation device 4. The drain discharged from the air dryer 3 and the air compressor 8 is processed by one oil / water separator 4. There is an advantage that the size of the housing can be further reduced as compared with the device of the third embodiment.

[0016]

Fifth Embodiment FIG. 5 shows an air dryer with an oil / water separator in which an air compressor is housed in the same housing, without providing a common floor plate 2, an air compressor 8, an air dryer 3, and an oil / water separator 4.
Are shown on the same surface in a fifth embodiment. 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 downstream 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 in the first embodiment. As in the fourth embodiment, there is an advantage that the size of the housing can be reduced, and in particular, the height can be suppressed.

[0017]

[Effect] The air dryer with the oil-water separator of the present invention requires less installation space than the conventional separation type, and since the position adjustment and piping have already been completed, there is little risk of failure and reliability is reduced. It can be provided as high equipment. 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 the clean drainage that does not contain oil. Also, in cold regions, the drain water in the oil-water separator may freeze in winter, so an electric heater has been provided so far to keep the temperature warm. However, in the present invention, the oil-water separator is connected to the air dryer 1 or the air compressor 8. Since these devices are provided in the same housing, it is possible to prevent the freezing while maintaining the exhaust heat of these devices to some extent, and there is an advantage that the need for 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 according to a first embodiment.

FIG. 2 is an elevation view of an air dryer with an oil-water separator according to a second embodiment.

FIG. 3 is an elevation view of an air dryer with an oil-water separator according to a third embodiment.

FIG. 4 is an elevation view of an air dryer with an oil-water separator according to a fourth embodiment.

FIG. 5 is an elevation view of an air dryer with an oil-water separator according to a fifth embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Housing 1a Upper stage 1b Lower stage 2 Floor plate 3 Air dryer 4 Oil-water separator 5 Drain trap

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B01D 17/04 501 B01D 17/04 501K F04B 39/16 F04B 39/16 F

Claims (5)

[Claims] 1. An air dryer, an oil / water separator connected to a drain discharge pipe of the air dryer, a drain trap connected to a downstream side of the oil / water separator, and a pipe connecting these components are installed in the same housing. An air dryer with an oil / water separator. 2. The air dryer with an oil / water separator according to claim 1, wherein the housing is divided into upper and lower stages, an air dryer is installed in an upper portion, and a drain trap and an oil / water separator are installed in a lower stage. 3. An air dryer, a drain trap connected to a drain discharge pipe of the air dryer, an oil / water separator connected downstream of the drain trap, and a water quality monitor connected downstream of the oil / water separator. An air dryer with an oil-water separator, wherein the device and a pipe connecting them are installed in the same housing. 4. An air dryer, an air compressor connected to an air suction port of the air dryer, and an oil / water separator connected to a drain discharge pipe of the air dryer and the air compressor via a drain trap and a check valve, respectively. And an air dryer with an oil-water separator, wherein the pipes connecting them are installed in the same housing. 5. 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,
An air dryer with an oil-water separator, wherein a drain trap connected downstream of the oil-water separator and a pipe connecting the drain traps are installed in the same housing.