JPH06298185A - Drain purifying device - Google Patents

Abstract

PURPOSE:To discharge bilge by surely treating it by an inexpensive device. CONSTITUTION:A filter means 3, a bilge pump 2 to supply treated wafer to this filter means 3, supply passages 20, 22 to supply the treated water from this bilge pump 2 to the filter means 3 and a return passage 23 to return the treated water supplied from the bilge pump 2 to the filter means 3 to the upstream side of the bilge pump 2 in correspondence with its pressure are furnished. Additionally, on an inlet part of the filter means 3, a T letter shaped splicer 4 furnished with an inflow passage, a return passage and a supply passage is provided, and a flow rate to the return passage 23 is increased in accordance with increase of flow resistance of the filter means 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waste water purifying device for purifying and discarding treated water such as bilge in a bilge reservoir of a small vessel.

[0002]

2. Description of the Related Art Conventionally, for example, water (bilge) containing oil and the like accumulated in an engine room of a ship has been sucked using a bilge pump and discharged to the outside of the ship through a hose.
However, if the bilge on the ship is discharged as it is, the problem of marine pollution arises. For this reason, large ships use a large-scale purification device to clean the bilge before discharging it to the sea.

[0003]

The drainage of the bilge is necessary even for small vessels, and in this case, the equipment cost of the purification apparatus used in the conventional large vessels becomes very expensive. Moreover, if the treated water is filtered and discharged with a normal filter using a currently known bilge pump, if the flow resistance increases due to the filter becoming dirty due to use, the bilge pump will be overloaded and the life of the bilge pump will be shortened. There is a problem. Further, if a bilge pump having a sufficiently large capacity is used so that the pump can be driven even after the filter becomes dirty, not only the apparatus becomes expensive, but also bilge which is not treated cleanly is discharged. .

The present invention has been made in order to solve the above-mentioned conventional drawbacks, and an object thereof is to provide a waste water purifying apparatus capable of surely treating and discharging bilge with an inexpensive apparatus. To do.

[0005]

The present invention is directed to a filter means, a pump means for supplying treated water to the filter means, a supply passage for supplying treated water from the pump means to the filter means, and the pump. And return means for returning the treated water supplied from the means to the filter means to the upstream side of the pump means corresponding to the pressure thereof.

A T-shaped connector having an inflow passage, a return passage and a supply passage is provided at the inlet of the filter means.
The return passage may be configured by the return passage and the return passage connected to the return passage. Further, the return means may be constituted by a return passage guided from a passage between the pump means and the filter means to an upstream side of the pump means, and a valve provided in the return passage and opened when a certain pressure is exceeded. Good.

[0007]

In the above structure, the treated water is supplied to the filter means by the pump means, and when the flow resistance increases due to the use of the filter means, the treated water is returned to the upstream side of the pump means through the return means in response to the pressure increase. Will be done. Therefore, the pump means is prevented from being overloaded.

[0008]

1 and 2, a bilge reservoir 12 is formed at the bottom of an engine room 15 at the stern of a hull 10, and a bilge 13 which is treated water is accumulated therein. The bilge pump (pump means) 2 is attached to the front wall 16 of the engine room 15 by the attachment member 14, and the filter means 3 is attached to the front wall 16 by the attachment member 17. Also, in the bilge reservoir 12, the bilge strainer 2
1 is installed, and bilge takeout passages (supply passages) 20 and 22 whose one end is connected to the bilge strainer 21 are guided to the filter means 3 through the bilge pump 2. A T-shaped connector 4 is provided at the inlet of the filter means 3, and the bilge take-out passage 20 is connected to the filter means 3 via this connector 4, and the bilge return passage (return means) from this connector 4 is also provided. 23 has been derived. Further, a bilge discharge passage 50 is led out from the outlet of the filter means 3, and the tip end thereof is connected to a discharge portion 59 formed through the side plate 19. The passage 20, 2
Each of 2, 23, and 50 may be formed of a flexible hose, or may be formed of an appropriate tube.

3 and 4 show a specific structure of the filter means 3, which is a cylindrical outer cylinder 31.
And an inner cylinder 32 arranged concentrically inside thereof, an upper plate 33 is integrally provided on the upper part of the outer cylinder 31, and a lid 34 is detachably attached to the lower end to hermetically seal the inside. ing. The first filter material 35 is provided inside the inner cylinder 32.
However, there is a second space in the annular space between the inner cylinder 32 and the outer cylinder 31.
While being filled with the filter material 36, a suction mat 37 is arranged at the upper end portion serving as an outlet portion. As this filter material, an appropriate material such as activated carbon that adsorbs the oil content in the bilge may be used. Further, it is preferable that the outer cylinder 31 and the inner cylinder 32 are made of a transparent material so that the dirty state of the filter can be seen from the outside.

The connecting tool 4 provided at the inlet of the filter means 3 is a T-shaped tube having an inflow passage 41, a return passage 42 and a supply passage 43 which open into the inner cylinder 32. A discharge pipe 5 for discharging the water filtered by the filter is attached to the outlet. The bilge take-out passage 20 is connected to the supply passage 43, and the treated water supplied from the bilge take-out passage 20 is branched from the return passage 42 and the return passage 42 so as to be sent to the return passage 42. By setting the flow resistance of the return means and the flow resistance of the filter means 3 to appropriate values, it is set so that the amount of treated water extended to the filter means 3 becomes a predetermined amount. .

Therefore, when the filter of the filter means 3 becomes dirty and the flow resistance increases, the inflow path 41 is correspondingly increased.
As a result, the flow rate of water flowing from the return path 42 to the return path 23 is increased as the flow rate of the water to the return path 23 is decreased.

FIG. 5 shows the relationship between the throughput of the filter means 3 for one minute and the cumulative throughput. The throughput gradually decreases in accordance with the clogging of the filter due to use, and begins to decrease rapidly at a certain point. Is shown. Therefore, it is necessary to replace the filter when the processing capacity is reduced to a predetermined level.

FIG. 6 shows another embodiment of the present invention, which is the same as the above embodiment in that the filter means 3, the supply passages 20 and 22, the pump means 2, the return passage 23 and the drain passage 50 are provided. . A branch pipe (connector) 40 is provided at the inlet of the filter means 3, and the bilge pump 2 connected to the extraction passage 22 is connected to the branch pipe 40 via the bilge extraction passage 20. An on-off valve 7 that opens when the pressure exceeds a certain pressure is provided, and the on-off valve 7 and the return passage 23 form a return means. Then, the entire amount of the treated water sent by the bilge pump 2 to the branch pipe 40 through the bilge take-out passage 20 is initially sent to the filter means 3, the filter means 3 becomes dirty and the flow resistance increases, and the flow resistance reaches a certain value or more. Then, the on-off valve 7 is opened so that the treated water is returned through the return passage 23.

FIG. 7 shows still another embodiment of the present invention, in which the inlet portion of the filter means 3 is provided with an intake pipe 49 having a single passage, and the bilge pump 2 between the bilge pump 2 and the filter means 3 is taken out. A bilge return passage 23 is connected to the passage 20, and an on-off valve 27 that opens at a constant pressure is provided in the bilge return passage 23. Even with this configuration, the entire amount of the treated water sent by the bilge pump 2 through the bilge removal passage 20 is sent to the filter means 3, the filter means 3 becomes dirty and the flow resistance increases, and when the flow resistance reaches a certain value or more, the on-off valve 27 is opened. Is opened and the treated water is returned through the return passage 23.

FIG. 8 shows still another embodiment of the present invention, in which a branch pipe (connector) 45 is provided at the inlet of the filter means 3.
The branch pipe 45 is provided with a flow rate adjusting valve 46, and the flow rate adjusting valve 46 and the return passage 23 constitute return means. Then, the treated water sent by the bilge pump 2 to the branch pipe 45 through the bilge extraction passage 20 is branched and sent to the filter means 3 and the return passage 23, and the flow rate of the return means is adjusted by adjusting the flow rate adjusting valve 46. The flow rate to the filter means 3 is adjusted.

In each of the above constructions, the bilge pump 2 having an appropriate size is selected according to the amount of treated water, and the treated water is supplied to the filter means 3 by continuous operation or intermittent operation, purified, and then discharged. Let If the flow resistance of the filter means 3 increases due to use, it is possible to prevent the bilge pump 2 from being excessively loaded merely by increasing the amount returned through the return passage 23. Therefore, even if a small-capacity bilge pump is used, there is no risk that the pump will be overloaded and that the life of the pump will not be shortened. Further, the filter means 3
When the amount of water to be treated due to the dirt is reduced to a predetermined amount, the filter may be replaced. The degree of contamination may be visually determined by forming the container of the filter means 3 with a transparent body, or may be automatically detected by measuring the water flow through the return passage 23. .

Although only the treatment of bilge of a ship has been described in the above embodiment, the present invention is similarly applicable to the case of discarding sewage produced in industrial and agricultural fields.

[0018]

As described above, according to the present invention, the filter means, the pump means, the supply passage for supplying the treated water from the pump means to the filter means, and the treated water corresponding to the pressure thereof. And return means for returning to the upstream side of the pump means, the treated water is supplied to the filter means by the pump means, and when the filter means increases the flow resistance due to use, the treated water is passed through the return means in response to the pressure increase. Will be returned to the upstream side of the pump means. Therefore, an excessive load is not applied to the pump means, and therefore the device can be made small and inexpensive.

[Brief description of drawings]

FIG. 1 is a sectional view of a rear portion of a hull showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is an enlarged sectional view of a filter means.

FIG. 4 is a plan view of FIG.

FIG. 5 is a characteristic diagram of the throughput of the bilge pump.

FIG. 6 is a conceptual diagram showing another embodiment of the present invention.

FIG. 7 is a conceptual diagram showing still another embodiment of the present invention.

FIG. 8 is a conceptual diagram showing still another embodiment of the present invention.

[Explanation of reference numerals] 2 Bilge pump 3 Filter means 4, 40, 45 Connecting tool 7, 27, 46 Open / close valve 20, 22 Bilge extraction passage (supply passage) 23 Return passage 50 Bilge discharge passage

Claims (3)

[Claims] 1. A filter means, a pump means for supplying treated water to the filter means, a supply passage for supplying treated water from the pump means to the filter means, and a pump means for supplying the treated water from the pump means to the filter means. A drainage purification device comprising: return means for returning treated water to the upstream side of the pump means in correspondence with the pressure thereof. 2. A T-shaped connector having an inflow passage, a return passage, and a supply passage is provided at an inlet portion of the filter means, and the return passage and the return passage connected to the return passage make the return. The wastewater purification device according to claim 1, wherein a passage is formed. 3. The return means includes a return passage that is guided from a passage between the pump means and the filter means to an upstream side of the pump means, and a valve provided in the return passage and opened when a certain pressure is exceeded. The wastewater purifying apparatus according to claim 1, wherein the wastewater purifying apparatus is configured.