JPH08126807A - Device for filtering waste hot water of bath - Google Patents

Abstract

PURPOSE: To provide a device for filtering waste hot water of a bath which is capable of removing fine dust in the waste hot water and is particularly good in workability at the time of clearing the stuck and deposited dust. CONSTITUTION: This device 1 for filtering the waste hot water of the bath is a filtering device to remove the dust out of the waste hot water discharged from the wash-place of the bath. The device 1 consists of a first stage filter 3 which removes the coarse dust, such as human hair and paper dust and a second stage filter for removing the fine dust, such as fur. This second stage filter 5 includes a planar fine-meshed filter 21, a waste hot water tank 25 arranged under the fine-meshed filter 21 and drain ditches 31, 32 which are disposed around the fine-meshed filter 21 and are connected to a drain path.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waste water filtering device used in large baths such as public baths and factory baths. In particular, it relates to a bath waste water filtering device suitable for combination with a plate heat exchanger capable of removing fine dust in the waste water and recovering the residual heat of the waste water.

[0002]

2. Description of the Related Art A conventional public bath will be described as an example. FIG. 2 is a system diagram showing an example of water-related facilities in a public bath. This public bath has facilities such as a bath 59, a washing space 63, a waste water heat exchanger 41, and a flat pot 53 for boiling hot water.

First, a hot water supply system will be described. Water supply water, well water, etc. are supplied to the bath from the water supply source pipe 44 (lower right of the figure) which is a water supply source. A considerable part of this water enters the waste water heat exchanger 41 through the water supply pipe 43, and the heat exchanger 41 receives a part of the heat of the waste water (temperature of 37 ° C.) to generate water. Is around 10 ° C (example 20 → 2
9 ° C) warmed. The water exiting the heat exchanger 41 is sent to the flat kettle 47 through the water supply pipe 45.

The flat pot 47 comprises a hot water bath 53, a smoke pipe 49 passing through the bath 53, a burner 51 for blowing a flame into the smoke pipe 49, and the like. The heat of the flame and flue gas is transferred to the hot water (water) in the hot water tank 53 through the smoke pipe 49, and the hot water boils. The smoke emitted from the smoke pipe 49 is emitted from the chimney 55. The hot water in the hot water tank 53 is sent to the adjustment box 57 by a pump or a gravity head.

The adjusting box 57 is a tank for adjusting the temperature of hot water. When the temperature inside the adjustment box 57 is too high, water is put into the adjustment box 57 from the water supply pipe 56 to lower the temperature of the hot water. In addition, such adjustment is automatically performed by a thermometer, an automatic valve, and a controller (not shown). Hot water is sent from the adjustment box 57 to the bathtub 59 and the currant (shower) 61 in the washroom 63.

[0006] Hot water used in currants and showers and hot water (waste hot water) that overflows the bathtub flow into the washing area 63, and enter the drainage channel 7 and are discharged. Waste water passes through filters 3 and 5 (this filter is the point of the present invention) to remove dust (human hair, hot water, etc.) and enters heat exchanger 41 in the process of being discharged from the bathhouse. In the heat exchanger 41, as described above, the residual heat of the waste water is supplied to the water supply, and a part of the exhaust heat is recovered. In addition, such waste water heat exchangers 41 are often installed in public baths in Hirai where demand for energy saving is increasing.

FIG. 3 is a diagram schematically showing the structure of a conventional waste water heat exchanger. In the waste water heat exchanger 71, water enters the water passages 75 in parallel from the water dividing header 73, and joins at the water collecting header 77. After that, they are separated again and proceed zigzag in the water passage to the left in the figure. On the other hand, the waste hot water moves rightward in the figure while moving up and down in the waste hot water passage 79 between the adjacent water passages 75. The adjacent hot water passage 79
Are connected at the top or bottom.

[0008]

A large amount of dust is mixed in the waste water flowing out from the washing place. The contents of the trash include relatively large trash such as shampoo bags and human hair, and relatively fine trash such as hot water stains. In the conventional waste water heat exchanger of FIG. 3, the width of the waste water passage 79 is set to 4
For a wide range of 0 to 50 mm, put something like a scrubbing scrubbing brush in the waste water passage 79, and once a week, the passage 7
9 The dust on the surface was washed off. If this is not done, the waste hot water passage 79 will be deteriorated due to dust, and the efficiency of heat exchange will decrease.

Such a conventional waste water heat exchanger has a problem that the width of the waste water passage 79 is wide and the heat exchanger becomes large. In addition, there is a problem that the waste water passage must be frequently cleaned. These problems were significant for public baths, where space is typically tight in towns, and for public baths where young workers are scarce.

As a means for solving the above-mentioned problem, it is conceivable to thoroughly remove dust in the waste water with a good filter, and then pass the clean waste water through a highly efficient plate heat exchanger. To be The plate heat exchanger is one in which a large number of metal plates are overlapped with a gap of 2 to 3 mm, and the gap is heat-exchanged with a liquid. However, it was difficult to get such a good filter. In particular, it was easy to clean the dust, and there was no filter that prevented dust from entering the clean side (heat exchanger side) during cleaning.

It is an object of the present invention to provide a bath waste water filtering device which is capable of removing fine dust in the waste water and has particularly good workability when cleaning the dust that has adhered and accumulated.

[0012]

In order to solve the above-mentioned problems, a bathhouse wastewater filtering device of the present invention is a filtering device for removing dust from wastewater discharged from a washing place of a bathhouse; It consists of a first-stage filter that removes coarse dust such as waste paper, and a second-stage filter that removes fine dust such as hot water stain; this second-stage filter is a sheet-like fine filter and a lower face of the fine filter. It is characterized by comprising a waste water tank arranged and a drainage groove arranged around the fine filter and connected to a drainage channel.

[0013]

[Operation] Debris such as red hot water accumulates on the mesh filter of the second stage filter. When removing this dust, drop it in the drainage groove around the mesh filter (not necessarily the entire circumference) while applying water. Alternatively, when the mesh filter is removed and replaced, dust falling sideways from the mesh filter falls into the drainage groove beside the filter and does not fall into the waste water tank under the filter (clean waste water tank). Therefore, it is easy to clean the filter, and dust is not mixed into the downstream side (clean side) of the filter.

[0014]

Embodiments of the present invention will be described below. Figure 1
1 is a diagram showing a bathhouse wastewater filtering device according to an embodiment of the present invention. (A) is a side sectional view showing an outline of the whole. (B) is a partially broken sectional view showing details of the two-stage filter. (C) is a plan view showing a slit and a moving claw portion of the one-stage filter. The filtering device 1 shown in FIG. 1 is a device for removing dust in the waste water 9 flowing from a washing place of a bath, and includes a one-stage filter 3 for removing coarse dust and a two-stage filter 5 for removing fine dust. Has been done.

The one-stage filter 3 of the filtering device 1 shown in FIG. 1 comprises a filter plate 11 having a large number of slits 12 cut therein, and a claw 13 which moves in the slits 12, and coarse dust 15 caught in the slits 12. And a moving claw 13 for pulling the.

That is, the one-stage filter 3 having a main body drum (slit filter 11) shaped like a rectangular parallelepiped having rounded ends is arranged in the drain groove 7. As shown in FIG. 1C, a large number of slits 12 (width of about 1 mm) are cut on the surface of the drum. A moving claw 13 is movably provided in the slit 12.

The width of the drainage groove 7 and the width of the one-stage filter 3 are substantially the same, and the waste water 9 flowing in the drainage groove 7 flows through the slits 12 of the slit filter 11 from left to right in the figure. At this time, a relatively large dust such as a shampoo bag or human hair is caught at the slit 12 entrance. In the slit 12, a moving claw 13 whose head is slightly protruding from the slit 12 is continuously moving while rotating, and dust caught at the entrance of the slit 12 is scraped by the moving claw 13. In this way, the dust 15 (FIG. 1A) accumulated in front of the moving claw 13 is collected in the dust basket 17 attached to the upper right portion of the single-stage filter 3.

The waste water 9 from which coarse dust has been removed by the first-stage filter 3 flows into the second-stage filter 5. FIG.
As shown in (B), the two-stage filter 5 basically has a structure in which a fine filter 21 is put on the upper surface of a rectangular box (tank 23). The fine filter 21 is thin (for example, 20 mm) such as nylon mesh or filter paper.
0-400 mesh) filter. The waste hot water rubbed by the filter 21 falls into the waste hot water tank 25 below the filter 21, passes through the waste hot water pipe 27, and enters the plate heat exchanger (41 in FIG. 2). The periphery of the filter 21 is
It is edged with something like a metal plate (not shown), and packing (not shown) such as rubber is also attached.

Drainage grooves (side surface drainage groove 31, front surface drainage groove 32) are provided around the fine filter 21 (both side surfaces and front surface in FIG. 1B), and these drainage grooves are used for filtering according to the present invention. This is a feature of the device. Drains 31, 32
Is connected to a drainage channel for sewage or the like via a connection drainage groove 33.

In the two-stage filter 5 shown in FIG. 1, normally, the waste water is poured onto the fine filter 21, the dust in the waste water remains on the filter 21, and the clean waste water is washed into the waste water tank. Falls to 25. However, as time passes with operation, dust accumulates on the filter 21. In that case, the upper surface of the filter 21 is brushed while sprinkling water with a hose. Then, water containing dust is caused to flow into the drain grooves 31 and 32. This will make it easier to filter 21
Can be cleaned.

Further, the filter 21 may be lifted for replacing the filter or cleaning it in another place. In that case, dust accumulated on the upper surface of the filter 21 may fall around. Such waste also drains 31, 32
Since it falls inside, dust does not fall into the waste water bath 25. Therefore, the inside of the waste water tank 25 is kept dust-free, and it is possible to prevent dust from flowing into the downstream plate heat exchanger.

Further, consider a case where the filter 21 is clogged and the waste water cannot pass through the filter 21 sufficiently. In this case, waste hot water (with dust) overflowing on the filter 21 is drained through the drain grooves 31, 32, 33. Therefore, the waste hot water containing such dust does not enter the waste hot water tank from the side of the filter 21.

[0023]

As is clear from the above description, the bath waste water filtering device of the present invention exhibits the following effects. Easy to clean dust accumulated on the two-stage filter. No dust will fall into the waste water tank when removing the fine filter.

Even when the filter is clogged, the waste water is guided to the drainage channel, and therefore the bath operation is not affected. Since small dust in the waste water can be removed, a small and efficient plate heat exchanger can be adopted. Therefore, energy saving and space saving can be achieved.

[Brief description of drawings]

FIG. 1 is a view showing a bathhouse waste water filtering device according to an embodiment of the present invention. (A) is a side sectional view showing an outline of the whole. (B) is a partially broken sectional view showing details of the two-stage filter. (C) is a plan view showing a slit and a moving claw portion of the one-stage filter.

FIG. 2 is a system diagram showing an example of water-related equipment in a public bath.

FIG. 3 is a diagram schematically showing the structure of a conventional waste water heat exchanger.

[Explanation of symbols]

1 Filtering device 3 1st stage filter 5 2nd stage filter 7 Drainage channel 9 Wastewater 9 Slit filter 12 Slit 13 Moving claw 15 Rough dust 17 Waste basket 21 Fine filter 23 Tank 25 Wastewater bath 27 Wastewater pipe 31 Side drainage channel 32 Front Drainage channel 33 Contact drainage channel 41 Heat exchanger 43 Water supply pipe 44 Water supply source pipe 45 Water supply pipe 47 Flat kettle 49 Smoke pipe 51 Burner 53 Hot water tank 55 Hot water supply pipe 57 Control box 59 Bathtub 61 Karan 63 Washing place 71 Waste water heat exchanger 73 Water splitting Header 75 Water passage 77 Water collection header 79 Waste water passage

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location B01D 35/02

Claims (2)

[Claims] Claim: What is claimed is: 1. A filtering device for removing dust from waste hot water discharged from a bathroom washing place; a first-stage filter for removing coarse dust such as human hair and waste paper, and fine dust such as hot water stains. It consists of a second-stage filter to be removed; this second-stage filter is connected to a sheet-shaped fine filter, a waste water tank arranged on the lower side of the fine filter, and a drainage channel arranged around the fine filter. A bathhouse wastewater filtering device comprising: a drainage channel. 2. The first-stage filter has a filter plate having a large number of slits, and claws that move in these slits, and a moving claw that draws in coarse dust caught in the slits. The bath hot water filtering device according to claim 1.