JPH07108264A - Drainage treating apparatus - Google Patents

Abstract

PURPOSE:To provide a drainage treating apparatus which prevents oil components from depositing on a neutralization material and maintains its neutralization function. CONSTITUTION:A drainage treating apparatus 50 is equipped with a drainage channel A for introducing drainage 23 produced in an engine exhaust passage; an oil separation apparatus 54 is placed in the intermediate part of the drainage channel A, and a neutralization apparatus 56 with a neutralization material 55 is arranged down from the oil separation apparatus 54.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drain water treatment apparatus for treating drain water generated when exhaust gas of an internal combustion engine is cooled.

[0002]

2. Description of the Related Art When the exhaust gas of an internal combustion engine is cooled, water vapor in the exhaust gas, vapor of acid component due to NOx or SOx, and vapor of oil component are condensed to generate acidic drain water containing oil component. To do.

For example, in an engine-driven heat pump device, an exhaust heat exchanger is arranged, so the exhaust gas temperature drops.

Further, even in a general internal combustion engine, when an expansion type exhaust silencer for reducing exhaust noise and an exhaust gas turbine for improving engine performance are arranged, or cooling water or outside air for relaxing thermal stress. In some cases, the exhaust gas passage wall is cooled, and in such a case, the exhaust gas temperature decreases.

[0005]

By the way, since the drain water generated from the exhaust gas has an acid component, it is not preferable to drain the drain water as it is although it is a small amount.

Further, for example, when drain water accumulates in the exhaust heat exchanger or the exhaust silencer, there is a problem that the life of the exhaust heat exchanger and the like is shortened due to the oxidizing action of the drain water.

Therefore, the applicant previously filed Japanese Patent Application No. 5-6.
A drain water treatment device of No. 3274 was proposed. This drain water treatment device is equipped with a neutralizer to neutralize the drain water, and can neutralize the acid component in the drain water, but the oil component adheres to the surface of the neutralizing material during use and neutralizes it. There was a problem that the function deteriorated.

The present invention has been made in view of the above problems, and it is an object of the present invention to provide a drain water treatment apparatus which prevents the oil component from adhering to the neutralizing material and prevents the neutralizing function from decreasing. Has an aim.

[0009]

In order to solve the above-mentioned problems, a drain water treatment apparatus according to claim 1 is provided with a drain water passage for introducing drain water generated in an exhaust passage of an engine, and the drain water passage is provided. The oil separating device and the neutralizing device having a neutralizing material are arranged downstream of the oil separating device.

In the drain water treatment apparatus of the second aspect of the present invention, the oil separation device is composed of an oil separation tank and a lipophilic material disposed above and below the water surface in the oil separation tank. I am trying.

In the drain water treatment apparatus according to the third aspect of the present invention, the oil separation device is an oil separation tank, an oil storage tank, and an oil transfer means for guiding oil from the water surface in the oil separation tank to the oil storage tank. It is characterized by being configured as.

In the drain water treatment apparatus according to the invention of claim 4, the oil transfer means passes through the oil separation tank above the water surface and above the oil separation tank water surface, and is located below the oil separation tank water surface. It is characterized by being composed of lipophilic materials up to.

According to the drain water treatment apparatus of the fifth aspect of the present invention, the first oil storage tank, the second oil storage tank having a larger capacity than the first oil storage tank, and the first oil storage tank are provided in the oil separation device. Pump means for transferring oil from the tank to the second oil storage tank, an oil level sensor is arranged in the second oil storage tank, and when the oil level sensor senses oil, the pump means is operated. It is characterized by being configured as follows.

[0014]

According to the first aspect of the invention, the oil separation device prevents the oil component from being removed from the drain water before the drain water reaches the neutralizing material, thereby preventing the oil component from adhering to the neutralizing material. , Prevent the neutralization function from decreasing.

According to the second aspect of the invention, the lipophilic material separates and absorbs the oil component from the water surface in the oil separation tank, and stores the oil not only in the portion below the water surface but also on the water surface. As a result, the oil separation function of the lipophilic material can be made to function for a long time, and the oil component can be removed from the drain water with a simple structure using the lipophilic material.

According to the third aspect of the invention, since the oil component is stored in the oil storage tank, the oil separation function can be made to function for a long time.

According to the fourth aspect of the present invention, gravity can be utilized in the oil transfer, and the lipophilic material can have both the oil separating function and the oil transfer path function, and the drain has a simple structure. The oil component can be removed from water.

According to the fifth aspect of the present invention, since the amount of oil removed from the drain water can be increased, the drain water can be treated for a long period of time.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the drain water treatment apparatus of the present invention will be described below with reference to the drawings.

1 to 3 show a first embodiment of the drain water treatment apparatus, FIG. 1 is a schematic configuration diagram of an outdoor unit in an engine-driven heat pump apparatus having the drain water treatment apparatus, and FIG. 2 is a drain. Cross-sectional view of the water treatment device, FIG.
FIG. 3 is a sectional view taken along line III-III of FIG.

In the figure, reference numeral 1 is an outdoor unit in an engine-driven heat pump device, and this outdoor unit 1 has a casing 2, which is a ground surface 3.
It is installed on top. An engine 4 is installed in the lower part of the casing 2, and the engine 4 is driven by using gas as fuel. A pair of compressors 6 and 6 are provided in the vicinity of the side of the engine 4, and each compressor 6 is driven by the engine 4.

An air cleaner 7 is connected to an intake port of the engine 4, and a pair of first exhaust pipes 8, a pair of exhaust heat exchangers 9, a second exhaust pipe (not shown), and an expansion chamber are connected to the exhaust port of the engine 4. The exhaust silencer 11, the third exhaust pipe 13, the mist separator 14, and the fourth exhaust pipe 15 arranged in this order are connected in this order. Air cleaner 7 and exhaust silencer 1
1 is located near the side of the upper part of the engine 4, and each exhaust heat exchanger 9 is located near the side of the lower part of the engine 4.

The mist separator 14 is located at the top of the casing 2, and the third exhaust pipe 15 is located in the casing 2.
It penetrates through the ceiling plate and is opened to the outside of the casing 2. In addition, 16 is a heat exchanger, 17 is an oil tank,
Reference numeral 18 is a refrigerant unit that stores a refrigerant such as CFC, 19 is an electrical unit, 20 is an outdoor fan attached to the upper end of the casing 2, and the outdoor fan 20 is the heat exchanger 16
The heat exchange action of (1) is promoted and the inside of the casing 2 is ventilated.

When the engine 4 is driven, the air in the casing 2 is sucked into the engine 4 through the air cleaner 7 together with the fuel gas, and is used for combustion. On the other hand, the high-temperature exhaust gas 21 discharged from the engine 4 first passes through the first exhaust pipe 8 and the exhaust heat exchanger 9, and when passing through the exhaust heat exchanger 9, the heat of the exhaust gas 21 becomes hot water. The heat of the hot water is given to the refrigerant.

Next, the exhaust gas 21 passes through the second exhaust pipe, the exhaust silencer 11, and further passes through the third exhaust pipe 13, the mist separator 14, and the fourth exhaust pipe 15 in that order and is discharged.

When each compressor 6 is driven by driving the engine 4, the refrigerant is compressed and circulated in a heat exchanger or the like in the room. As a result, air conditioning for cooling or heating is performed.

In this case, the exhaust gas 21 from the engine 4 is
In particular, when flowing through the exhaust heat exchanger 9 and the exhaust silencer 11, the exhaust gas 21 is significantly cooled by heat exchange and its temperature drops, and drain water 23 having an acidic content is generated. In addition, the mist separator 14 is also separated from the exhaust gas 21,
Drain water 23 with acid content is produced.

In the engine-driven heat pump device which is such an air conditioner, since the heat recovery efficiency of the heat exchanger is increased in order to increase the heat efficiency, the amount of the drain water 23 generated is large.

Therefore, a drain water treatment device 50 for treating the drain water 23 is provided. The drain water treatment device 50 is provided with drain water inlets 51 to 53 of the drain water passage A for introducing the drain water 23.
The downstream end side of the lower exhaust heat exchanger 9 of the two exhaust heat exchangers 9 is connected to the first drain water pipe 35. The exhaust silencer 11 is connected to the drain water inlet 52 by the second drain water pipe 37. Further, the mist separator 14 is connected to the drain water inlet 53 by the third drain water pipe 38.

An oil separator 54 is provided in the middle of the drain water passage A.
A neutralizing device 56 having a neutralizing material 55 is arranged downstream of the oil separating device 54.

The drain water treatment device 50 is located below the exhaust heat exchanger 9 and the exhaust silencer 11, and is provided at the bottom of the casing 2.

As shown in FIGS. 2 and 3, the oil separation device 54 includes a primary storage tank 57b, an oil separation tank 57, and an oil storage tank 5.
8 and the lipophilic material 59 which is arranged over the oil separation tank 57 and the oil storage tank 58. The lipophilic material 59 passes through the water surface upper window 93b that opens above the partition wall 93. The oil separation tank 57 and the oil storage tank 58 are arranged upstream of the neutralization device 56 in a casing 61 having a lid 60 that can be opened and closed. The primary storage tank 57b and the oil separation tank 57 communicate with each other through an upper passage 62 and a lower passage 63. The upper passage 62 guides the drain water 23 together with the oil components floating on the water surface of the primary storage tank, and the lower passage 63 guides the drain water 23 together with the oil components precipitated by the emulsification to the oil separation tank 57. The lipophilic material 59 has a cloth-like or net-like shape made of water-repellent and lipophilic fibers, and one end 59a thereof contacts the bottom surface of the oil separation tank 57,
The other end 59b is in contact with the bottom surface of the oil storage tank 58.

Drain water inlets 51 to 51 are provided in the primary storage tank 57b.
Since 53 is formed and the intake port for the drain water 23 is provided in the middle of the exhaust passage including the exhaust silencer and the heat exchanger,
The drain water 23 can be guided to the oil separation tank 57 not only by gravity but also by the exhaust gas pressure, and a special transfer pump is unnecessary.

Thus, the oil storage tank 58 and the oil separation tank 5
7. The lipophilic material 59 is arranged above and below the inner water surface, and the lipophilic material 59 separates and absorbs the oil component from the inner water surface of the oil separation tank 57 by the capillary phenomenon and guides it to the oil storage tank 58. Also, the oil component becomes an emulsion and the oil separation tank 5
Even if it settles downward in 7, the lipophilic material 59 will not separate into the oil separation tank 57.
Since it extends to the bottom, it is possible to absorb only the oil component and transfer the oil by the capillary phenomenon.
Be led to. Further, a manual opening / closing valve 64 is provided on the side portion of the oil storage tank 58, and the oil 120 stored in the oil storage tank 58 is discharged by the manual opening / closing valve 64.

As the lipophilic material 59, there is, for example, an oil-absorbing mat, and polypropylene non-woven fabric (toughness), polypropylene-polyethylene mixed non-woven fabric (Looklin), polypropylene non-woven fabric subjected to hydrophilic treatment (DM Sorb), polypropylene-polyethylene mixed non-woven fabric. Examples include those that have been subjected to oil-hydrophilic treatment, those that form a bag of polypropylene nonwoven fabric, and the inside of which has been packed with a particulate acrylic resin (oleosob pack).

Further, a felt-like material made of these materials or a rope-like material obtained by twisting these fiber threads may be used.

In this way, the lipophilic material 59 becomes the oil separation tank 57.
The oil is separated and absorbed from the inner water surface, and the oil is separated and absorbed not only on the portion below the water surface but also on the water surface. By providing the oil storage tank 58, the oil separation function of the lipophilic material 59 functions for a long time. It is possible to Moreover, lipophilic material 5
With a simple structure using 9, the oil component can be removed from the drain water.

The neutralization device 56 arranged downstream of the oil separation device 50 partitions the inside of the casing 61 and has a large number of holes 65 in the lower part.
A neutralizing tank 67 is provided by the plates 65 and 66 having a and 66a, and the neutralizing tank 67 is filled with a granular neutralizing material 55 such as limestone or calcium carbonate. Since the neutralization device 56 is located inside the casing 2 together with the engine 4 and is kept warm, the neutralization reaction in the neutralization device 56 is promoted and this neutralization reaction is effectively performed. Further, a chamber 68 downstream of the neutralization device 56 is a space, and a drain water outlet 69 is provided in this chamber 68 and opens to the outside of the casing 2. The drain water 23 enters the neutralizing material 55 and is neutralized, and is discharged from the drain water outlet 69 together with the exhaust gas 21.

Since the neutralizing material 55 functions as a weir and raises the water surface of the oil separation tank 57, the capillarity of the lipophilic material 59 and the oil transfer by the siphon function are maintained.

The neutralizing material 55 is eluted and reduced by neutralization, and the neutralizing material 55 arranged above the water surface in the neutralizing tank 67 is sequentially replenished. It is also possible to open the lid 60 and replenish the neutralizing material 55 to the neutralizing tank 67.

The following figures show other embodiments.
It should be noted that configurations and operations that are common to these embodiments and the above-described embodiments are denoted by common reference numerals in the drawings, redundant description will be omitted, and different components will be mainly described.

FIG. 4 is a sectional view showing a second embodiment of the drain water treatment apparatus. In this embodiment, the casing 61 is provided with an openable / closable lid 60.
A neutralization device 56 is arranged inside, and an oil separation device 54 is arranged on the upstream side of the neutralization device 56.

This oil separation device 54 includes an oil separation tank 57,
The oil separation tank 57 is composed of lipophilic materials 70 arranged above and below the water surface. The lipophilic material 70 is formed of, for example, an oil-absorbing mat filled with acrylic resin, which is an oil-absorbing resin, using polypropylene non-woven fabric as a core material, and the lipophilic material 70 is provided along the plate 65 having many holes 65a of the neutralization device 56 A passage 71 is formed at the lower ends of the plate 65 and the lipophilic material 70.

Therefore, the lipophilic material 70 of the oil separating device 54 removes the oil component from the drain water before the drain water 23 reaches the neutralizing material 55, and the oil component adheres to the neutralizing material 55. Prevent. When the lipophilic material 70 is used for a predetermined period, the lid 60 is opened and the lipophilic material 70 is replaced.

5 and 6 show a third embodiment of the drain water treatment apparatus, and FIG. 5 is a schematic configuration diagram of a part of an outdoor unit in an engine-driven heat pump apparatus equipped with the drain water treatment apparatus. 6 is a sectional view of the drain water treatment device. In the drain water treatment device 50 of this embodiment, an oil separation device 54 and a neutralization device 56 are arranged independently, and both are connected by a connecting pipe 72.

The neutralizer 56 is provided with a lid 74 on the casing 73 so that the lid 74 can be opened and closed.
a plate 75 having a is provided to form the neutralization tank 67,
The neutralization tank 67 is filled with the neutralizer 55. A dam plate 77 is provided in the chamber 76 on the downstream side of the neutralization tank 67, and the drain water 23 overflows from the dam plate 77 and is discharged from the drain water outlet 78.

The oil separation device 54 is composed of an oil separation tank 57, an oil storage tank 58, a lipophilic material 59, a casing 61 and a lid 60. A dam plate 79 is provided in the oil separation tank 57,
Inside the dam plate 79, a partition wall 81 that forms a passage 80 is provided in the lower portion.

An introduction passage 82 is formed through the oil storage tank 58, and drain water supplied from the drain water inlets 51 to 53 of the drain water passage A is accumulated in the oil separation tank 57 from the introduction passage 82, and this dam plate Drain water 2 overflowing from 79
3 is guided to the neutralization device 56 via the communication pipe 72. The partition wall 81 provided inside the barrier plate 79 prevents the oil component on the water surface from overflowing.

The lipophilic material 59 separates only the oil component from the drain water 23 in the oil separation tank 57, and the oil thus absorbed and separated is guided to the oil storage tank 58.

An oil level sensor 83 is provided in the oil storage tank 58, and the control device 84 opens and closes the electromagnetic valve 85 based on the detection signal of the oil level sensor 83. By opening this solenoid valve 85, the oil collected in the oil storage tank 58 is discharged to the second oil storage tank 86 larger than the storable volume of the oil storage tank 58,
The second oil storage tank 86 is arranged below the casing 2. An oil take-out cap 87 is provided on the front side of the second oil storage tank 86.

FIG. 7 to FIG. 11 show a fourth example of the drain water treatment device.
FIG. 7 shows an embodiment, FIG. 7 is a schematic configuration diagram of an outdoor unit in an engine-driven heat pump device including a drain water treatment device, FIG. 8 is a cross-sectional view of the drain water treatment device, and FIG.
FIG. 10 is a sectional view taken along line IX-IX, FIG. 10 is a sectional view taken along line XX in FIG. 8, and FIG. 11 is a perspective view of the lipophilic material.

The drain water treatment device 50 of this embodiment is arranged outside the outdoor unit 1 in the engine-driven heat pump device. In this drain water treatment device 50,
The casing 88 is provided with an openable / closable lid 89, and the neutralization device 56 is disposed in the casing 88.
An oil separation device 54 is arranged on the upstream side of 6.

The oil separating device 54 is provided with a partition wall 93 for separating the oil separating tank 5.
7 and the oil storage tank 58 are formed, and the lipophilic material 159 that passes over the water surface in the oil separation tank 57 and reaches the oil surface 120 in the oil storage tank 58 located below the water surface in the oil separation tank 57. Are arranged. The lipophilic material 159 is attached to the mounting portion 159.
a and a straddle portion 159b. The mounting portion 159a and the straddle portion 159b are sewn and connected to a joint portion 159c formed by bending the mounting portion 159a, and the mounting portion 159a is connected to the plate 65 of the neutralization device 56. It is attached along with the metal fitting 121, and the straddle 159c is the partition wall 93.
It is attached across. One end 159d of the straddle 159b contacts the bottom surface of the oil separation tank 57, and the other end 159d.
e is in contact with the bottom surface of the oil storage tank 58.

The attachment portion 159a of the lipophilic material 159 is made of an absorbent mat made of polypropylene / polyethylene mixed non-woven fabric, and the straddle portion 159b is made of an absorbent mat made of polypropylene non-woven fabric. That is, it is possible to increase the oil separation efficiency at a low cost by using a combination of lipophilic materials having different oil separation characteristics.

The drain water 23 is supplied from the drain water introducing pipe 94 to the oil separation tank 57, and the oil component is absorbed and separated by the lipophilic material 159 by the lipophilic material 159 by the capillarity and taken out to the oil storage tank 58, Since the oil component is stored in the oil storage tank 58, the oil separation function can function for a long time. A transparent window 95 for confirming the amount of oil is provided on a side portion of the oil storage tank 58, and an opening / closing valve 96 for taking out oil is provided at a lower position of the side portion.

The weir plate 9 is provided in the chamber 90 on the downstream side of the neutralizer 56.
1, the plate 65 of the neutralization device 56 is provided with a large number of holes 65a at a position facing the oil separation tank 57 up to the height of the dam plate 91, and the plate 66 is equipped with the dam plate 9
A large number of holes 66a are formed at positions above the height of 1.

The attachment portion 159a of the lipophilic material 159 is arranged so as to completely cover the opening area 65b of the hole 65a of the plate 65, and the drain water 23 must pass through the absorption mat forming the attachment portion 159a. Oil that could not be separated at the straddle 159b and the end 159d is reliably absorbed and separated.

Accordingly, the drain water 23 is supplied from the oil separation tank 57 to the neutralization tank 57 through the large number of holes 65a of the plate 65 of the neutralization device 56, and further the large number of holes 66 of the plate 66 are provided.
It is supplied from a into the weir plate 91. The drain water 23 overflows from the barrier plate 91 and is discharged from the drain water outlet 92.

12 and 13 show a fifth embodiment of the drain water treatment apparatus, FIG. 12 is a schematic configuration diagram of an engine having the drain water treatment apparatus, and FIG. 13 is a transverse sectional view of a float of the drain water treatment apparatus. is there.

The engine 97 is an engine that uses gasoline, light oil, or the like as a fuel, and has a fuel tank 98. In addition, the intake silencer 99 on the intake side of the engine 97,
An exhaust pipe 100 is connected to the exhaust side. The exhaust pipe 100 is extended laterally to form a drain receiver 101 at the exhaust port 100a, and the exhaust pipe 100 is extended laterally to be cooled.

The drain water 23 is introduced from the drain receiver 101 into the oil separation tank 57 of the oil separation device 54 through the pipe 102. The oil separation tank 54 is used for the neutralization device 5.
6 is arranged on the upstream side. The neutralizer 56 is constructed similarly to the embodiment of FIG. In this way, the exhaust port 10
A drain water receiver 101 is provided below 0a, and drain water 23 is introduced from here to perform oil separation and neutralization.

A float 103 is provided inside the oil separation tank 57, and an oil suction port 104 is formed at a position of 2 to 3 mm below the water surface by making the inside of the float 103 a recess, and the outside of the oil suction port 104 and the float 103. An internal / external communication passage 105 that communicates with the oil is formed. The internal / external communication passage 105 guides oil from the water surface inside the oil separation tank 57 to the oil suction port 104. An upper end 259a of a rope-shaped lipophilic material 259 is provided inside the oil suction port 104, and a lower end 259b of the lipophilic material 259 extends to the bottom surface of the oil separation tank 57. Even if the oil component becomes an emulsion and precipitates downward in the oil separation tank 57, only the oil component is absorbed, separated, and guided to the oil suction port 104.

The oil suction port 104 of the float 103 is the pipe 1
If the oil sensor 104 provided on the float 103 is connected to the oil storage tank 58 via 10 and the oil inlet 104 or the oil sensor 106 provided on the float 103 at the same position as the oil inlet 104 or at a lower position of about 1 mm detects oil, the controller 107 drives the pump 108. The oil that has been absorbed and separated is guided to the oil storage tank 58. The oil storage tank 58 is provided with an opening / closing valve 109 for taking out oil.

FIG. 14 is a perspective view showing a sixth embodiment of the drain water treatment device. In this embodiment, the oil separation tank 5 is provided in each of the outdoor units 1 of the plurality of engine-driven heat pump devices.
7. A first oil storage tank 58 and a neutralization tank 67 are arranged. On the other hand, a small number of second oil storage tanks 201 communicating with the respective first oil storage tanks 58 via the oil feed pipes 200 are arranged. This first
The capacity of the second oil storage tank 201 is larger than that of the oil storage tank 58.

An oil level sensor 202 is provided in the first oil storage tank 58.
When the oil level sensor 202 detects oil,
It is possible to increase the amount of oil stored by operating the oil feed pump 203 constituting the pump means and discharging the oil to the second oil storage tank 201, so that drain water treatment is possible for a long period of time.

[0066]

As described above, according to the first aspect of the present invention, the oil component is removed from the drain water by the oil separation device before the drain water reaches the neutralizing agent, and the oil component is added to the neutralizing agent. Can be prevented from adhering and the neutralizing function can be prevented from being deteriorated.

According to the second aspect of the invention, the lipophilic material separates and absorbs the oil component from the water surface in the oil separation tank and separates and absorbs the oil not only on the portion below the water surface but also on the water surface. The oil separation function can be made to function for a long time, and the oil component can be removed from the drain water with a simple structure using a lipophilic material.

According to the third aspect of the invention, since the oil component is stored in the oil storage tank, the oil separation function can be made to function for a long time.

According to the fourth aspect of the invention, gravity can be utilized in the oil transfer, and the lipophilic material can have both the oil separating function and the oil transfer path function, and the drain has a simple structure. The oil component can be removed from water.

According to the fifth aspect of the invention, since the amount of oil stored can be increased, the drain water can be treated for a long period of time.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of an outdoor unit in an engine-driven heat pump device including a drain water treatment device.

FIG. 2 is a cross-sectional view of a drain water treatment device.

FIG. 3 is a sectional view taken along the line III-III in FIG.

FIG. 4 is a sectional view showing a second embodiment of the drain water treatment device.

FIG. 5 is a schematic configuration diagram of a part of an outdoor unit in an engine-driven heat pump device including a drain water treatment device.

FIG. 6 is a sectional view of a drain water treatment device.

FIG. 7 is a schematic configuration diagram of an outdoor unit in an engine-driven heat pump device including a drain water treatment device.

FIG. 8 is a cross-sectional view of the drain water treatment device.

9 is a sectional view taken along line IX-IX in FIG.

10 is a cross-sectional view taken along line XX of FIG.

FIG. 11 is a perspective view of a lipophilic material.

FIG. 12 is a schematic configuration diagram of an engine including a drain water treatment device.

FIG. 13 is a cross-sectional view of a float of the drain water treatment device.

FIG. 14 is a perspective view showing a sixth embodiment of the drain water treatment device.

[Explanation of symbols]

 4 Engine 23 Drain Water 50 Drain Water Treatment Device 54 Oil Separation Device 55 Neutralizer 56 Neutralizer A Drain Water Passage

Claims (5)

[Claims] 1. A neutralization device having a drain water passage for introducing drain water generated in an exhaust passage of an engine, an oil separation device in the middle of the drain water passage, and a neutralizing material downstream of the oil separation device. The drain water treatment device is characterized in that 2. The drain water treatment device according to claim 1, wherein the oil separation device comprises an oil separation tank and a lipophilic material arranged above and below the water surface in the oil separation tank. . 3. The oil separation device comprises an oil separation tank, an oil storage tank, and an oil transfer means for guiding oil from the water surface in the oil separation tank to the oil storage tank. The drain water treatment device described. 4. The oil transfer means is composed of a lipophilic material that passes above the water in the oil separation tank and reaches the oil surface in the oil storage tank located below the water surface in the oil separation tank. The drain water treatment device according to claim 3, which is characterized in that. 5. The first oil storage tank, the second oil storage tank having a larger capacity than the first oil storage tank, and the oil transferred from the first oil storage tank to the second oil storage tank are transferred to the oil separation device. And a pump means for operating the oil level sensor, wherein an oil level sensor is arranged in the second oil storage tank, and the pump means is operated when the oil level sensor senses oil. The drain water treatment device according to 1.