JPH0639371A - Water purifying system - Google Patents

Abstract

PURPOSE:To supply high quality water from a water storage tank and extend the water purifying life by properly circulating water in a water storage tank to a first and a second purifying tanks having a filtering material and remove impurities contained in the storage water by the filtering material to purify the water. CONSTITUTION:A water purifying system is provided with tank 1 placed at a high place to store supplied water temporarily, a first circulating pipeline 11 of which each terminal part is connected with the tank, and a pump 12 installed near one connection terminal part. A first purifying tank 21 having a filtering material is installed in the outlet side of the pump, a second solenoid valve 16 is set in the outlet side of the first purifying tank 21, a second circulating route 31 is made to bypass between the outlet side of the pump 12 and the outlet side of the solenoid valve 16, and a second purifying tank 41 having a filtering material is installed in the second circulating route 31. In the case the solenoid valve 16 is closed and the pump 12 is operated, the water in the tank 1 at a high position is circulated to the second purifying tank 41 of the second circulating route 31 and in the case the solenoid valve 16 is opened, water is circulated to the first purifying tank 21 of the first circulating route 11 and impurities are removed by the built-in filtering material.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water purification system useful for buildings such as condominiums and office buildings.

[0002]

2. Description of the Related Art In buildings such as condominiums and office buildings, tap water is pumped to a high tank installed on the roof of the building, and the water is pumped from the high tank to the faucet of each room in the building. The water is available.

[0003]

However, in addition to the rust generated in the tank, algae, bacteria, etc. are easily mixed in the water supplied from the elevated tank to the required place in the building, and the water is directly fed from the water pipe. Compared with the case where water is supplied to the faucet, there are many impurities and the water quality deteriorates.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a water purification system capable of appropriately purifying water supplied from a water storage tank such as an elevated tank. .

[0005]

In order to achieve the above-mentioned object, in claim 1, a water storage tank for temporarily storing the supply water, and a first circulation pipe line having each end connected to the water storage tank are provided. A pump installed near one connection end of the first circulation line, a first septic tank containing a filter medium installed on the outlet side of the pump of the first circulation line, and a first circulation line An on-off valve installed on the outlet side of the septic tank, a second circulation line that bypasses the pump outlet side of the first circulation line and the outlet side of the on-off valve, and filtration installed on the second circulation line. A water purification system is composed of a second septic tank with a built-in material.

According to a second aspect of the present invention, in the water purification system of the first aspect, the second circulating pipe is provided on the outlet side of the opening / closing valve of the first circulating pipe line and on the downstream side of the connection end with the second circulating pipe line. An on-off valve and a drain pipe for discharging the water in the second septic tank are provided.

According to a third aspect of the present invention, in the water purification system according to the first or second aspect, the ozone outlet of the ozone generator is connected to the first circulation line.

According to a fourth aspect, in the water purification system according to any one of the first to third aspects, the adsorbent is arranged in the first septic tank, and the flow path is switched from the outlet side of the pump of the first circulation pipeline. A regeneration pipe branching through the valve to reach the first septic tank, a heater-equipped hot water generating tank interposed in the regeneration pipe, and a drain pipe for discharging water in the first septic tank ing.

According to a fifth aspect, in the water purification system according to the fourth aspect, a sterilizing lamp capable of irradiating ultraviolet rays is arranged in the first septic tank, and a catalyst containing a platinum group oxide and an oxide ceramic as a main component. Is arranged around the germicidal lamp.

[0010]

In the water purification system according to the first aspect of the present invention, the pump is operated with the on-off valve closed to move the water in the water storage tank to the second septic tank of the second circulation line and with the on-off valve opened. By operating the pump, the water in the water storage tank can be circulated in the first septic tank of the first circulation line. At the time of circulation, impurities contained in the stored water are removed by the filter media contained in the respective septic tanks.

In the water purification system according to the second aspect of the present invention, the pump is operated with the opening / closing valve opened and the second opening / closing valve closed, whereby the water is made to flow backward through the second circulation pipe and is captured by the filter medium. The impurities contained therein can be separated from the filter material, and the water containing them can be discharged to the outside through the drainage pipe.

In the water purification system according to the third aspect, it is possible to kill the bacteria contained in the stored water by mixing ozone into the water flowing through the first circulation line.

In the water purification system according to the fourth aspect, odors, hypochlorite, organic chlorine compounds, etc. can be adsorbed and removed by the adsorbent during circulation to the first circulation line, and the valve can be switched in the high tank. The stored water of is heated through the hot water generation tank and sent to the septic tank to desorb the hypochlorite and organic chlorine compounds adsorbed by the adsorbent into the hot water,
Water containing these can be discharged to the outside from the drainage pipe.

In the water purification system according to claim 5, the hypochlorous salt and the organic chlorine compound desorbed in warm water are decomposed by a catalyst and a photocatalytic reaction by ultraviolet rays by the same action as in claim 4, and the decomposed component is contained. Water can be discharged to the outside from the drain pipe.

[0015]

FIG. 1 shows a schematic structure of a water purification system to which the present invention is applied. In the figure, 1 is a high tank,
11 is a first circulation pipe, 21 is a first septic tank, 31 is a second circulation pipe, 41 is a second septic tank, 51 is a regeneration pipe, and 61 is a hot water production tank.

The high tank 1 is installed on the roof of a building such as a condominium or office building, and has a water level sensor 2 such as a float switch for detecting the water level of stored water therein. Further, one end of a pumping pipe line 3 reaching the underground of the building is connected to the upper surface of the elevated tank 1, and the other end of the pumping pipe line 2 is a pumping pump 4 arranged underground and a receiving tank (not shown). Is connected to the water mains via. Further, one end of a water supply pipe 5 leading to the water faucet of each room in the building is connected to the lower end of the side surface of the high tank 1, and the outlet of the chlorine generator 6 is provided in the middle of the water supply pipe 5 as a mixing pump. It is connected via 7.

As shown in FIG. 2, the chlorine generator 6 is arranged at a main body tank 6c having an inlet 6a at the upper end of the side surface and an outlet 6b at the lower end of the side surface, and a position near the outlet in the main body tank 6c. It is composed of a positive electrode 6d and a negative electrode 6e arranged at a position near the entrance in the main body tank 6c. A water pipe S having an on-off valve is connected to the inlet 6a of the main body tank 6c, and the inlet of the pump 7 is connected to the outlet 6b directly or via a relay pipe 6f. This chlorine generator 6
Then, by electrolyzing tap water, hypochlorite ions (clO ⁻ ) are generated around the positive electrode 6d, and the ion water can be sent into the water supply pipe 4 by the pump 7 to be mixed with the supply water. More specifically, by proportionally operating the pump 7 according to the flow rate of the water supply pipeline 5, the water flowing through the water supply pipeline 5 can contain chlorine at a concentration (0.1 ppm or more) equivalent to the water supply standard.

The first circulation line 11 has one end with the elevated tank 1
Is connected to the lower end of the side surface and the other end is connected to the upper end of the side surface of the high tank 1. A circulation pump 12 and an electromagnetic three-way switching valve (hereinafter, referred to as a first electromagnetic valve) 13 that can be opened and closed are arranged in this first circulation line 11 in order from a lower connection end.
, Venturi pipe 14, check valve 15, and first described later
A septic tank 21, an electromagnetic opening / closing valve 16 (hereinafter referred to as a second electromagnetic valve), and an electromagnetic opening / closing valve 17 (hereinafter referred to as a second electromagnetic valve) are interposed. In addition, a drainage conduit 19 in which an electromagnetic on-off valve 18 (hereinafter referred to as a fourth electromagnetic valve) is interposed is connected between the check valve 15 and the first septic tank 21.

As shown in FIG. 3, the Venturi pipe 14 is made of a pipe material whose cross-sectional diameter gradually decreases toward the center and has an introduction hole 14a in the minimum diameter portion. In addition, the inlet of the venturi pipe 14 is directly connected to the outlet of the ozone generator 20 of the silent discharge type or the relay pipe 1
It is connected via 4b. In the venturi pipe 14, ozone (O3) generated by the ozone generator 20 can be sent into the venturi pipe 14 through the introduction hole 14a and mixed into the circulating water.

The first septic tank 21 is, as shown in FIG.
Main body tank 2 having inlet 22a at the center of the lower surface, outlet 22b at the center of the upper surface, and hot water inlet 22c at the lower end of the side surface
2, a rectifying plate 23 arranged above the hot water inlet 22c of the main body tank 22, a prefilter 24 arranged above the rectifying plate 23, and an adsorption layer 25 arranged above the prefilter 24. The bottomed cylindrical catalyst layer 26 is arranged above the adsorption layer 25, and the UV lamp 27 is arranged in the center of the inside of the catalyst layer 26. The adsorption layer 25 is formed of fibrous or granular activated carbon, and the catalyst layer 26 is formed by supporting a complex of platinum group oxide and oxide ceramics, which is a catalyst, on the surface of zeolite shaped into a bottomed cylinder. A large number of holes (not shown) formed in the peripheral surface
Is provided. The platinum group oxide is Pt,
Oxides such as Rd and Ru are used, and as oxide-based ceramics, rutile type or anatase type titanium oxide is used. The functional details of the first septic tank 21 will be described later.

The second circulation line 31 has one end connected between the circulation pump 12 of the first circulation line 11 and the first electromagnetic valve 13, and the other end connected to the second circulation line of the first circulation line 11. It is connected between the solenoid valve 16 and the second solenoid valve 17, and bypasses the first circulation line 11. An electromagnetic opening / closing valve 32 (hereinafter referred to as a fifth electromagnetic valve) and a second septic tank 41, which will be described later, are provided in this second circulation pipeline 31 in order from the connection end on the circulation pump 12 side. In addition, the second septic tank 41 and the fifth solenoid valve 3
A drain pipe line 34 in which an electromagnetic on-off valve 33 (hereinafter, referred to as a sixth electromagnetic valve) is interposed is connected between the first and second terminals.

The second septic tank 41, as shown in FIG.
A lower member 42 having an inlet 42a at the center of the lower surface, an upper member 43 having an outlet 43a at the center of the upper surface and being detachably screwed to the lower member 42, and its peripheral edge sandwiched between the upper and lower members 42, 43. And a strainer 44 that has been formed.

One end of the regeneration pipe line 51 is connected to the outlet port of the first electromagnetic valve 13, and the other end is connected to the hot water inlet port 22c of the first septic tank 21. A hot water production tank 61, which will be described later, is interposed in the regeneration pipeline 51.

The hot water producing tank 61, as shown in FIG.
A main body tank 62 having an inlet 62a at the center of the upper surface and an outlet 62b at the center of the lower surface, a panel-shaped electric heater 63 attached to the peripheral surface of the main body layer 62, and a server provided on the inner wall of the main body layer 62. It is composed of a temperature sensor 64 such as a mister and a water level sensor 65 such as a float switch arranged in the main body layer 62. The functional details of this hot water production tank 61 will be described later.

FIG. 6 shows an electric system circuit relating to the water purification system shown in FIG. In the figure, 71 is a control unit having a microcomputer configuration, 72 is an operation switch, and 7
3 to 78 are first to sixth solenoid valves 13, 16 to 18,
32 and 33 drive parts, 79 is a drive part of the pump 4 for pumping water,
80 is a drive part of the circulation pump 12, 81 is a chlorine generator 6
Drive unit for the mixing pump 7, 83 drive unit for the ozone generator 20, 84 drive unit for the UV lamp 27, 85 drive unit for the electrothermal heater 63, and 2 is a high drive unit. The water level sensor of the stationary tank 1, 64 is a temperature sensor of the hot water generating layer 61, and 65 is a water level sensor of the hot water generating layer 61.

The control unit 71 has a CPU and a memory storing a program, and the like.
Based on the operation signals and detection signals of the water level sensor 2, the temperature sensor 64, and the water level sensor 65, a control signal is sent to each of the drive units 73 to 85 according to a program.

Here, the water purification operation in the water purification system shown in FIG. 1 will be described with reference to FIGS. 7 to 9. Although not shown in FIGS. 7 to 9, the water level of the stored water in the high tank 1 approaches a predetermined high water level by the intermittent operation of the pump 4 for pumping water based on the detection signal of the water level sensor 2. Controlled by. Further, the water sent from the elevated tank 1 to the water supply pipe 5 is mixed with chlorine of a predetermined concentration from the chlorine generator 6 via the pump 7.

When the operation switch 72 is turned on, first, the third solenoid valve 17 and the fifth solenoid valve 32 are opened and the other solenoid valves 13, 16, 18, 33 are closed, and the circulation pump 12 is closed. Are operated (s1 to s3 in FIG. 7). As a result, the stored water in the high tank 1 circulates through the second circulation pipeline 31 according to the broken line arrow in FIG. 1, and the circulating water sent into the second septic tank 41 is relatively large dust in the strainer 44.
Removes rust and algae. This circulation is continuously performed for a predetermined time ts, for example, 1 minute (s4 in FIG. 6).

After a lapse of time, the first electromagnetic valve 13 is switched to the first septic tank 21 side, the second electromagnetic valve 16 is opened, and the fifth electromagnetic valve 32 is closed. Further, the ozone generator 20 is activated and the UV lamp 27 is turned on (s5 to s7 in FIG. 6).

As a result, the stored water in the high tank 1 circulates through the first circulation line 11 in accordance with the solid line arrow in FIG. 1, ozone is mixed into the circulating water at the position of the venturi pipe 14, and the ozone kills the bacteria. To do. Further, the circulating water sent into the first septic tank 21 is subjected to removal of dust, rust, algae and the like smaller than the above by the pre-filter 24, and at the same time, the adsorption layer 25 and the catalyst layer 26 remove odor and hypochlorous salt, The organic chlorine compound or the like is adsorbed and removed, and the ultraviolet rays from the UV lamp 27 kill bacteria. In this example, an organic chlorine compound such as trihalomethane is mainly adsorbed by the adsorption layer 25 made of activated carbon, and hypochlorite and cations are mainly adsorbed by the catalyst layer 26 made of zeolite and a catalyst.

When the water level L of the stored water obtained from the signal of the water level sensor 2 of the high tank 1 is equal to or higher than the set water level Ls and the water level change amount ΔA per unit time is smaller than the set value A, that is, in the building When the water consumption in the water is low or becomes zero, the ozone generator 20 is stopped and the first
The solenoid valve 13 is switched to the hot water production tank 41 side, and the second solenoid valve 16 is closed (s8 in FIG. 7, s9, s1 in FIG. 8).
0). As a result, the stored water in the high tank 1 is
Hot water generation tank 61 through the regeneration pipe line 51 according to the dashed line arrow
Sent to.

The water level F in the warm water production tank 61 is the set water level Fs.
When the temperature rises, the circulation pump 12 is stopped, and energization of the electric heat heater 63 is started (s11 to s1 in FIG. 8).
3). Then, when the water temperature in the hot water generation tank 61 reaches the set water temperature Ts, for example, 70 to 80 ° C. by heating the electric heat heater 63, the electricity supply to the electric heat heater 63 is stopped, and the fourth solenoid valve 1
8 is opened (s14 to s16 in FIG. 8).

As a result, the water in the first septic tank 21 is drained from the inlet 22a through the drainage conduit 19, and along with this, the hot water in the hot water producing tank 61 follows the two-dot chain line arrow in FIG. The hypochlorite and the organic chlorine compound that are taken into the adsorption layer 25 and adsorbed on the adsorption layer 25 and the catalyst layer 26 are desorbed in warm water, and these are the platinum group-based oxide and oxide-based ceramic composite of the catalyst layer 26. While being in contact with the (catalyst), it is exposed to ultraviolet rays and decomposed by a photocatalytic reaction, and hot water containing the decomposed component is discharged to the outside through the drainage conduit 19. Further, at this time, dust, rust, algae and the like captured by the pre-filter 24 are also separated by the water flow, and are discharged to the outside through the drainage conduit 19 together with the above-mentioned decomposed components. The fourth solenoid valve 18 is continuously opened for a predetermined time ts until the hot water in the hot water producing tank 61 is completely discharged from the drainage pipe 19 (s17 in FIG. 8).

After a lapse of time, the first solenoid valve 13 is switched to the first septic tank 21 side, the second solenoid valve 16 is opened, and the third solenoid valve 17 and the fourth solenoid valve 18 are closed,
The sixth solenoid valve 33 is opened. Further, the ozone generator 20 is activated and the UV lamp 27 is turned on (s18 in FIG. 9).
Through s21).

As a result, the stored water in the high tank 1 circulates in the first circulation line 11 in accordance with the three-dot chain line arrow in FIG.
After being subjected to the same purification and sterilization action as described above, it flows into the second circulation pipeline 31 from the first circulation pipeline 11 and enters the second purification tank 41.
Backflow, and the dust, rust, and the like captured by the strainer 44
Algae and the like are separated by the water flow, and the water containing these is discharged to the outside through the drainage pipe 34. This circulation is continuously performed for a predetermined time ts, for example, 1 minute (s22 in FIG. 9). After the lapse of time, the third solenoid valve 17 is opened, the sixth solenoid valve is closed (s23 in FIG. 9), the process returns to step s8, and the same procedure is repeated until the operation switch 72 is turned off.

Thus, according to the above water purification system,
By circulating the stored water in the elevated tank 1 to the first septic tank 21 and the second septic tank 41, dust, rust, algae and the like contained in the stored water are pre-filter 24 and strainer 44.
Further, odor, hypochlorite, organic chlorine compounds, etc. are removed by the adsorption layer 25 and the catalyst layer 26, respectively, and purified high-quality water can be constantly supplied from the elevated tank 1 to each room in the building.

In addition, when the pump is started, the stored water in the high tank 1 is circulated in the second septic tank 41 for a predetermined time first, and then circulated in the first septic tank 21 for purification.
As compared with the case where the stored water is directly sent to the first septic tank 21, it is possible to prevent clogging and functional deterioration of the septic tank 21, and it is possible to improve the purification life.

Further, when the stored water is circulated in the first septic tank 21, the third solenoid valve 17 is closed to cause the water to flow backward through the second circulation pipe line 31 and the dust trapped in the strainer 44, Rust, algae, etc. can be separated from the strainer 44, and water containing these can be discharged to the outside from the drainage pipe, so that the trapping ability of the strainer 44 is restored and the purifying function in the second septic tank 41 is continued. Can be demonstrated well.

Furthermore, during circulation to the first septic tank 21, bacteria in the circulating water can be killed by mixing ozone and irradiating ultraviolet rays, and aseptic water can be supplied.

Furthermore, the water stored in the high tank 1 is sent to the hot water production tank 61 to be heated and sent to the first purification tank 21, whereby the adsorption layer 25 and the catalyst layer 26 are supplied.
Since the hypochlorite and the organic chlorine compound adsorbed on the can be desorbed in warm water to restore the adsorption capacity of each layer 25, 26 and regenerated, the adsorption layer 25 and the catalyst layer 26 need not be replaced. The purification function in the 1 septic tank 21 can be continuously and satisfactorily exhibited. Further, at the time of this regeneration, the dust, rust, algae, etc. attached to the pre-filter 24 are simultaneously removed by the water flow, so that the capturing ability of the pre-filter 24 can be restored.

Furthermore, the hypochlorous salt and the organic chlorine compound desorbed in the warm water can be decomposed by the photocatalytic reaction of the catalyst of the catalyst layer 26 and the ultraviolet rays of the UV lamp 27, so that harmful substances are directly discharged to the outside. Can be prevented.

FIG. 10 shows another example of the first septic tank. In the figure, a hot water production tank 61 is shown in addition to the first septic tank 91, but the configuration of the hot water production tank 61 is the same as that described above.

The septic tank 91 has an inlet 92a at the center of the lower surface.
And a main body tank 92 each having an outlet 92b on one side of the lower surface and a hot water inlet 92c at the lower end of the side surface, and a cylindrical guide passage 93 arranged in the center of the main body layer 92 extending to the inlet 92.
A ring-shaped adsorption layer 94 arranged above the hot water inlet 92c of the main body tank 92, a ring-shaped prefilter 95 arranged above the adsorption layer 94, and a ring arranged above the prefilter 95. Of the straightening plate 96, a cylindrical catalyst layer 97 arranged on the inner surface of the guide passage 93, and a UV lamp 98 arranged in the center of the inside of the catalyst layer 97.
The adsorption layer 94 is formed of fibrous or granular activated carbon, and the catalyst layer 97 is formed by supporting a composite of platinum group oxide and oxide ceramics on the surface of zeolite shaped into a bottomed cylinder. There is. As the platinum group oxide, oxides such as Pt, Rd and Ru are used, and as the oxide ceramics, rutile type or anatase type titanium oxide and the like are used.

The circulating water sent from the inlet 92a into the septic tank 92 at the time of purification flows in the order of the guide passage 93, the straightening plate 96, the prefilter 95, and the adsorption layer 94, and is sent out from the outlet 92b. In this distribution process, bacteria are killed by the ultraviolet rays from the UV lamp 98, odors, hypochlorite, organic chlorine compounds, etc. are adsorbed by the adsorption layer 94 and the catalyst layer 97, and dust, rust, algae, etc. are adsorbed by the prefilter 95. Is removed. Similar to the above-mentioned first septic tank 21, an organic chlorine compound such as trihalomethane is mainly adsorbed in the adsorption layer 95 made of activated carbon, and a hypochlorite is formed in the catalyst layer 97 made of zeolite, platinum group oxide and oxide ceramics. Chlorine salts and cations are mainly adsorbed.

The hot water sent into the septic tank 91 from the hot water inlet 92c during regeneration flows in the order of the adsorption layer 94, the prefilter 95, the straightening plate 96, and the guide passage 93, and is sent out from the inlet 92b. In this distribution process, the adsorption layer 9
4 and the hypochlorite salt and the organic chlorine compound adsorbed on the catalyst layer 97 are desorbed in warm water, and these come into contact with the platinum group-based oxide and oxide-based ceramic composite (catalyst) of the catalyst layer 97. Meanwhile, it is exposed to ultraviolet rays and decomposed by a photocatalytic reaction. At this time, dust, rust, algae and the like captured by the pre-filter 95 are separated by the water flow and are discharged together with the decomposed components.

Although the strainer is disposed in the second septic tank in the above-mentioned embodiment, the strainer may be another filtering material such as a prefilter. Also, the circulation water purification circuit on the side of the first septic tank is shown with a regeneration circuit composed of a regeneration pipe and a hot water generation tank, but the system configuration without the regeneration circuit can also purify the stored water in the high tank. Of course, even if the ozone generator and the Venturi tube are excluded, if the UV lamp in the septic tank is turned on, the sterilization can be performed by ultraviolet rays. Further, although the one in which the circulation to the second septic tank is started first when the pump is started is shown, the circulation may be performed at every predetermined time during the pump operation. Furthermore, when the amount of water consumed in the building is low or has become zero, the regeneration of the adsorption layer of the first septic tank and the like is started, and then the strainer of the second septic tank is regenerated. As shown, both regenerations may be performed at night or at predetermined time intervals and separately, and should be started when the conductivity of water, which is proportional to the concentration of heavy metal ions or bacteria, exceeds a predetermined range. May be. Furthermore, the electric heat heater of the hot water producing tank may be another heat source or a device utilizing waste heat.

[0047]

As described above in detail, according to the water purification system of the first aspect, the water contained in the water storage tank is appropriately circulated to the first septic tank and the second septic tank to remove impurities contained in the stored water. High-quality water that has been purified by removing it with a filter material can be supplied from a water storage tank. Further, since the water in the water storage tank can be circulated through the second septic tank first and then circulated to the first septic tank for purification, clogging of the septic tank can be prevented as compared with the case where the stored water is directly sent to the first septic tank. It is possible to prevent functional deterioration and improve the purification life.

According to the water purification system of the second aspect, the water is made to flow backward through the second circulation pipe to separate the impurities captured by the filter medium from the filter medium, and the water containing them is drained. Since it can be discharged from the outside to the outside, it is possible to restore the trapping ability of the filter medium and continue to exert the purifying function in the second septic tank well.

According to the water purification system of the third aspect, ozone can be mixed during the circulation to the first septic tank to kill the bacteria in the circulation water, and aseptic water can be supplied to each room in the building. .

According to the water purification system of the fourth aspect, the water in the water storage tank is heated through the hot water generation tank and sent to the purification tank to remove the hypochlorite salt and the organic chlorine compound adsorbed by the adsorbent. Since the adsorbent can be desorbed in warm water to recover its adsorption capacity and can be regenerated, the adsorbent need not be replaced, and the purifying function in the first septic tank can be continuously exerted well.

According to the water purification system of claim 5, the hypochlorite and the organic chlorine compound desorbed in the warm water at the time of the regeneration can be decomposed by the photocatalytic reaction by the catalyst and the ultraviolet rays, so that the harmful substances are directly discharged to the outside. Can be prevented.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a water purification system to which the present invention is applied.

FIG. 2 is a sectional view of the chlorine generator shown in FIG.

FIG. 3 is a sectional view of the Venturi tube shown in FIG.

FIG. 4 is a cross-sectional view of the first septic tank and the hot water producing tank shown in FIG.

5 is a cross-sectional view of the second septic tank shown in FIG.

FIG. 6 is a block diagram of an electric circuit of the water purification system.

[Figure 7] Flow chart for water purification control

[Figure 8] Flow chart for water purification control

[Fig. 9] Flow chart for water purification control

FIG. 10 is a cross-sectional view showing another example of the first septic tank.

[Explanation of symbols]

1 ... High tank, 3 ... Pumping pipeline, 5 ... Water supply pipeline, 11 ...
1st circulation pipeline, 12 ... Circulation pump, 13 ... 1st solenoid valve, 16 ... 2nd solenoid valve, 17 ... 3rd solenoid valve, 19 ... Drainage pipeline, 21 ... Purification layer, 24 ... Prefilter, 25 Adsorption layer, 26 ... Catalyst layer, 27 ... UV lamp, 31 ... Second circulation line, 41 ... Second septic tank, 44 ... Strainer, 51 ... Regeneration line, 61 ... Hot water generation tank, 63 ... Electrothermal heat -Ta, 71 ...
Control part, 73-85 ... Drive part, 91 ... Purification layer, 94 ... Adsorption layer, 95 ... Prefilter, 97 ... Catalyst layer, 98 ... UV
lamp.

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[Procedure amendment]

[Submission date] November 16, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0046

[Correction method] Change

[Correction content]

Although the strainer is arranged in the second septic tank in the above-mentioned embodiment, the strainer may be another filtering material such as a prefilter. Also, the circulation water purification circuit on the side of the first septic tank is shown with a regeneration circuit consisting of a regeneration pipe and a hot water generation tank, but the system configuration without the regeneration circuit can also purify the stored water in the high tank. Of course, even if the ozone generator and the Venturi tube are excluded, if the UV lamp in the septic tank is turned on, the sterilization can be performed by ultraviolet rays. Further, although the one in which the circulation to the second septic tank is started first when the pump is started is shown, the circulation may be performed at every predetermined time during the pump operation. Furthermore, when the consumption of water in the building is low or zero, regeneration of the adsorption layer of the first septic tank etc. is started, and then the strainer of the second septic tank is regenerated. However, both regenerations may be performed at night or at predetermined time intervals and separately, and may be started when the conductivity of water proportional to the concentration of heavy metal ions or bacteria exceeds a predetermined range. Good. Furthermore, the electric heater of the hot water producing tank may be another heat source or a device using waste heat.
In addition, hot water is used as a desorption means for regenerating the septic tank.
Ete but it may also be using superheated steam.

Claims (5)

[Claims] 1. A water storage tank for temporarily storing supply water, a first circulation pipe having each end connected to the water storage tank, and a pump interposed near one connection end of the first circulation pipe. A first septic tank with a built-in filter medium installed on the outlet side of the pump of the first circulation line; an on-off valve installed on the outlet side of the first septic tank of the first circulation line; and a first circulation A purified water comprising: a second circulation pipe that bypasses the outlet side of the pump and the outlet side of the on-off valve of the pipe line; and a second septic tank with a built-in filter media interposed in the second circulation pipe. system. 2. A second opening / closing valve provided on the outlet side of the opening / closing valve of the first circulation pipeline and on the downstream side of a connection end with the second circulation pipeline, and water in the second septic tank. The water purification system according to claim 1, further comprising: a drainage pipe for discharging. 3. The water purification system according to claim 1 or 2, wherein an ozone outlet of the ozone generator is connected to the first circulation line. 4. A regeneration conduit, in which an adsorbent is disposed in the first septic tank, and a branch pipe is branched from the outlet side of the pump of the first circulation conduit via a valve for switching the passage to the first septic tank, The hot water production tank with a heater interposed in the pipeline, and a drainage pipeline for discharging the water in the first septic tank are provided. Water purification system. 5. A sterilization lamp capable of irradiating ultraviolet rays is arranged in the first septic tank, and a catalyst containing platinum group oxide and oxide ceramics as main components is arranged around the sterilization lamp. The water purification system according to claim 4, which is characterized.