JPH0639372A - Water purification system - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a water purification system capable of appropriately purifying water supplied from a storage tank such as an elevated tank. [Structure] A water storage tank 1 for temporarily storing supply water,
A water purification system is constructed from a circulation pipeline 11 having each end connected to the water storage tank 1, a pump 12 interposed in the circulation pipeline 11, and a septic tank 21 with a built-in filter medium interposed in the circulation pipeline 11. Since it is configured, the pump 12 is activated to operate the water storage tank 1
By circulating the water in the septic tank 21, dust, rust, algae, etc. contained in the stored water can be removed by a filter 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 supply water, a circulation pipeline having each end connected to the water storage tank, and a circulation pipeline. A water purification system is composed of a pump installed in the water tank and a septic tank with a built-in filter media installed in the circulation pipeline.

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

According to a third aspect of the present invention, in the water purification system according to the first or second aspect, an adsorbent is arranged in the septic tank, and the adsorbent is branched from the pump outlet side of the circulation pipe through a passage switching valve to the septic tank. There are provided a bypass pipeline, a hot water generating tank with a heater interposed in the bypass pipeline, and a drain pipeline for discharging water in the septic tank.

According to a fourth aspect of the present invention, in the water purification system according to the third aspect, a sterilizing lamp capable of irradiating ultraviolet rays is arranged in the septic tank, and the catalyst containing platinum group oxides and oxide ceramics as main components is sterilized. It is arranged around the lamp.

[0009]

In the water purification system according to the first aspect, by operating the pump to circulate the water in the water storage tank to the septic tank, dust, rust, algae and the like contained in the water storage can be removed by the filter medium.

In the water purification system according to the second aspect, bacteria contained in the stored water can be killed by mixing ozone into the water flowing through the circulation pipeline.

In the water purification system according to the third aspect of the present invention, the water in the water storage tank is heated by the valve switching through the hot water generation tank and sent to the purification tank, whereby the hypochlorite and the organic chlorine compound adsorbed by the adsorbent are provided. Can be desorbed in warm water, and the water containing the desorbed water can be discharged to the outside from the drain pipe.

In the water purification system according to claim 4, the hypochlorous salt and the organochlorine compound desorbed in warm water are decomposed by a catalyst and a photocatalytic reaction by ultraviolet rays by the same action as in claim 3, and the decomposed component is contained. Water can be discharged to the outside from the drain pipe.

[0013]

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 circulation line, 21 is a septic tank, 31 is a bypass line,
Reference numeral 41 is a hot water production tank.

The elevated tank 1 is installed on a rooftop of a building such as a condominium or an 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 pipeline 3 that reaches the basement of the building is connected to the upper surface of the elevated tank 1, and the other end of the pumping pipeline 2 is a pumping pump 4 and a receiving tank (not shown in the figure) that are disposed underground. ) 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 in 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 circulation line 11 has one end connected to the lower end of the side surface of the high tank 1 and the other end 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 solenoid valve) 13, a venturi pipe 14, a check valve 15, a septic tank 21 described later, and an electromagnetic on-off valve 16
(Hereinafter, referred to as a second solenoid valve) is provided. Also,
An electromagnetic on-off valve 17 is provided between the check valve 15 and the septic tank 21.
The drainage pipe 18 in which (hereinafter, referred to as a third solenoid valve) is interposed
Are connected.

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. Further, the outlet of the ozone generator 19 of a silent discharge type or the like is directly introduced into the introduction hole 14a of the venturi pipe 14 or the relay pipe 1
It is connected via 4b. In the venturi pipe 14, ozone (O3) generated by the ozone generator 19 can be sent into the venturi pipe 14 through the introduction hole 14a and mixed into the circulating water.

As shown in FIG. 4, the septic tank 21 has an inlet 22a at the center of the lower surface and an outlet 22b at the center of the upper surface,
Further, the main body tank 22 having a hot water inlet 22c at the lower end of the side
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, A bottomed cylindrical catalyst layer 26 disposed on the upper side of the adsorption layer 25, and a U disposed on the inner center of the catalyst layer 26.
It is composed of a V lamp 27. 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 in a bottomed cylinder. A large number of holes (not shown) are provided in the peripheral surface portion of the formed hole. The platinum group oxides are Pt and R
Oxides such as d and Ru are used, and rutile type or anatase type titanium oxide is used as the oxide ceramics. Details of the function of the septic tank 21 will be described later.

One end of the bypass line 31 has the first solenoid valve 13
Of the septic tank 21 to the outlet port of
2c is connected. A hot water production tank 41 is provided in the bypass pipe 31.

The hot water producing tank 41, as shown in FIG.
A main body tank 42 having an inlet 42a in the center of the upper surface and an outlet 42b in the center of the lower surface, a panel-shaped electric heater 43 attached to the peripheral surface of the main body layer 42, and a server provided on the inner wall of the main body layer 42. It is composed of a temperature sensor 44 such as a mister and a water level sensor 45 such as a float switch arranged in the main body layer 42. The functional details of this hot water production tank 41 will be described later.

FIG. 5 shows an electric system circuit relating to the water purification system shown in FIG. In the figure, 51 is a control unit having a microcomputer configuration, 52 is an operation switch, 5
Reference numerals 3 to 55 are drive units for the first to third solenoid valves 13, 16, 17; 56 is a drive unit for the pump 4 for pumping water; 57 is a drive unit for the circulation pump 12; and 58 is a drive unit for the chlorine generator 6. 5,
Reference numeral 9 is a drive unit of the mixing pump 7, and 60 is an ozone generator 19.
, 61 is a drive unit for the UV lamp 27, 62 is a drive unit for the electric heater 43, 2 is a water level sensor of the high tank 1, 44 is a temperature sensor of the hot water generation layer 41, and 45 is hot water generation. Water level sensor for layer 41.

The control unit 51 has a CPU and a memory storing programs, and the like.
Based on the operation signal and the detection signal of the water level sensor 2, the temperature sensor 44, and the water level sensor 45, a control signal is sent to each of the drive units 53 to 61 according to a program.

Now, the water purification operation in the water purification system shown in FIG. 1 will be described with reference to FIG. Although not shown in FIG. 6, the water level of the stored water in the high tank 1 is controlled to approach 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. It 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 52 is turned on, the first solenoid valve 13 is switched to the septic tank 21 side, the second solenoid valve 16 is opened, and the third solenoid valve 17 is closed. Along with this, the ozone generator 19 is operated, the UV lamp 27 is turned on, and the circulation pump 12 is operated (s in FIG. 6).
1 to s5).

As a result, the stored water in the high tank 1 is sent to the circulation pipeline 11 and circulated according to the solid line arrow in FIG. At the position of the venturi pipe 14, ozone is mixed into the water flowing through the circulation pipe 11, and the ozone kills the bacteria. Further, the circulating water sent into the septic tank 21 from the inlet 22a is subjected to removal of dust, rust, algae, etc. by the prefilter 24, and odors, hypochlorite, organic chlorine compounds, etc. are adsorbed by the adsorption layer 25 and the catalyst layer 26. Is absorbed and removed, and further U
Ultraviolet rays from the V lamp 27 kill the 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 19 is stopped and the first
The electromagnetic valve 13 is switched to the hot water production tank 41 side, and the second electromagnetic valve 16 is closed (s6 to s8 in FIG. 6). As a result, the stored water in the high tank 1 is sent from the circulation pipeline 11 to the hot water production tank 41 through the bypass pipeline 31 according to the broken line arrow in FIG.

The water level F in the warm water production tank 41 is the set water level Fs.
When the temperature rises to 0, the circulation pump 12 is stopped, and energization to the electric heating heater 43 is started (s9 to s1 in FIG. 6).
1). Then, when the water temperature in the hot water generation tank 41 reaches the set water temperature Ts, for example, 70 to 80 ° C. by heating the electric heat heater 43, the electric power supply to the electric heat heater 43 is stopped, and the third solenoid valve 1
7 is opened (s12 to s14 in FIG. 6).

As a result, the water in the septic tank 21 enters the inlet 22.
The water is discharged from a through the drainage pipe 18, and accordingly, the hot water in the hot water producing tank 41 is taken into the septic tank 21 according to the one-dot chain line arrow in FIG. 1, and is adsorbed by the adsorption layer 25 and the catalyst layer 26. Chlorite salts and organic chlorine compounds are desorbed in warm water, and these are decomposed by photocatalytic reaction by being exposed to ultraviolet rays while contacting the composite (catalyst) of the platinum group oxide and oxide ceramics of the catalyst layer 26, Hot water containing the decomposed components is discharged to the outside through the drainage pipe 18. At this time, dust, rust, and the like captured by the pre-filter 24
The algae and the like are also separated by the water flow, and are discharged to the outside through the drainage pipe 18 together with the decomposed components.

The third electromagnetic valve 17 has a predetermined time ts until the hot water in the hot water producing tank 41 is completely discharged from the drainage pipe 18.
Only it is continuously opened (s15 in FIG. 6). After the lapse of time, the process returns to step s1 and the above procedure is repeated until the operation switch 52 is turned off.

Thus, according to the above water purification system,
The first solenoid valve 13 is switched to the septic tank 21 side, and the second solenoid valve 16
The circulating pump 11 is operated in the open state to circulate the stored water in the high tank 1 to the septic tank 21 to remove dust, rust, algae and the like contained in the stored water from the pre-filter 24.
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.

Further, during the above circulation, bacteria in the circulating water can be killed by mixing ozone and irradiating with ultraviolet rays, and aseptic water can be supplied to each room in the building.

Further, with the first electromagnetic valve 13 switched to the septic tank 21 side and the second electromagnetic valve 16 opened, the circulation pump 11
Is operated to feed the stored water in the high-place tank 1 to the hot water generation tank 41 to heat it and feed the hot water to the purification tank 21, whereby the hypochlorous salt adsorbed in the adsorption layer 25 and the catalyst layer 26 is adsorbed. Also, since the organic chlorine compound can be desorbed in warm water to restore the adsorption capacity of each layer 25, 26 and can be regenerated, replacement of the adsorption layer 25 and the catalyst layer 26 becomes unnecessary, and the above-mentioned purification function can be continued and improved satisfactorily. Can be demonstrated. Also, at the time of this regeneration, dust, rust,
The capturing ability of the pre-filter 24 can be restored by removing algae or the like.

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

FIG. 7 shows another example of the septic tank. In the figure, a hot water production tank 41 is shown in addition to the septic tank 71, but the configuration of the hot water production tank 41 is the same as that described above.

The septic tank 71 has an inlet 72a at the center of the lower surface.
, A main body tank 72 having outlets 72b on one side of the lower surface, and a hot water inlet 72c at the lower end of the side surface, and a cylindrical guide passage 73 arranged in the center of the main body layer 72 extending to the inlet 72.
An annular adsorption layer 74 arranged above the hot water inlet 72c of the main body tank 72, an annular pre-filter 75 arranged above the adsorption layer 74, and an annular arrangement arranged above the pre-filter 75. The flow control plate 76, the tubular catalyst layer 77 arranged on the inner surface of the guide passage 73, and the UV lamp 78 arranged in the center of the inside of the catalyst layer 77.
The adsorption layer 74 is formed of fibrous or granular activated carbon, and the catalyst layer 77 is formed by supporting a complex of platinum group oxide and oxide ceramics on the surface of zeolite shaped like 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 72a into the septic tank 72 at the time of purification flows in the order of the guide passage 73, the straightening plate 76, the prefilter 75, and the adsorption layer 74, and is sent out from the outlet 72b. In this distribution process, bacteria are killed by the ultraviolet rays from the UV lamp 78, and odor, hypochlorite, organic chlorine compounds, etc. are adsorbed by the adsorption layer 74 and the catalyst layer 77, and dust, rust, algae, etc. are adsorbed by the prefilter 75. Is removed. Similar to the septic tank 21, the organic chlorine compound such as trihalomethane is mainly adsorbed in the adsorption layer 75 made of activated carbon, and the hypochlorite salt is made in the catalyst layer 77 made of zeolite, platinum group oxide and oxide ceramics. And cations are mainly adsorbed.

The hot water sent into the septic tank 71 from the hot water inlet 72c during regeneration flows in the order of the adsorption layer 74, the prefilter 75, the straightening plate 76, and the guide passage 73, and is sent out from the inlet 72b. In this distribution process, the adsorption layer 7
4 and the hypochlorite salt and the organic chlorine compound adsorbed on the catalyst layer 77 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 77. Meanwhile, it is exposed to ultraviolet rays and decomposed by a photocatalytic reaction. Further, at this time, dust, rust, algae and the like attached to the pre-filter 75 are separated and discharged together with the decomposed components.

In the above-mentioned embodiment, the water purification circuit having the septic tank and the regenerating circuit consisting of the bypass pipe and the hot water producing tank are shown. However, even if the regenerating circuit is excluded, the high tank is installed. Of course, the stored water in the inside can be purified, and even if the ozone generator and the Venturi tube are excluded, if the UV lamp in the septic tank is turned on, it can be sterilized by ultraviolet rays. Further, although the one in which the regeneration is started when the consumption of water in the building is low or reaches zero is shown, the regeneration may be performed at night or at every predetermined time. Alternatively, it may be started when the electrical conductivity of water, which is proportional to the concentration of bacteria, exceeds a predetermined range. Further, the electric heat heater of the hot water production tank may be another heat source or a device utilizing waste heat.

[0039]

As described above in detail, according to the water purification system of claim 1, the water in the water storage tank is circulated to the septic tank to remove dust, rust, algae, etc. contained in the water storage. It is possible to supply high quality purified water from the water storage tank.

According to the water purification system of the second aspect, ozone can be mixed during the above circulation to kill bacteria in the circulating water, and aseptic water can be supplied.

According to the water purification system of the third aspect, the water in the water storage tank is heated by the valve switching through the hot water generation tank and sent to the purification tank, so that the hypochlorite salt and the organic matter adsorbed by the adsorbent are discharged. Since the chlorine compound can be desorbed in warm water to recover its adsorption capacity and can be regenerated, it is not necessary to replace the adsorbent and the above-mentioned purification function can be continuously exerted well.

According to the water purification system of claim 4, 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.

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

FIG. 5: Block diagram of electric circuit of water purification system

[Fig. 6] Flow chart for water purification control

FIG. 7 is a cross-sectional view showing another example of the septic tank.

[Explanation of symbols]

1 ... High tank, 3 ... Pumping pipeline, 5 ... Water supply pipeline, 11 ...
Circulation pipeline, 12 ... Circulation pump, 18 ... Drainage pipeline, 21
... Purification layer, 24 ... Pre-filter, 25 ... Adsorption layer, 26 ...
Catalyst layer, 27 ... UV lamp, 31 ... Bypass conduit, 41
... Warm water generation tank, 43 ... Electric heat heater, 51 ... Control unit, 53
-62 ... drive part, 71 ... purification layer, 74 ... adsorption layer, 75 ...
Pre-filter, 77 ... Catalyst layer, 78 ... UV lamp.

[Procedure amendment]

[Submission date] November 12, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0038

[Correction method] Change

[Correction content]

In the above-mentioned embodiment, the water purification circuit having the septic tank and the regenerating circuit consisting of the bypass pipe and the hot water producing tank are shown. However, even if the regenerating circuit is excluded, the high tank is installed. Of course, the stored water in the inside can be purified, and even if the ozone generator and the Venturi tube are excluded, if the UV lamp in the septic tank is turned on, it can be sterilized by ultraviolet rays. Further, although the one in which the regeneration is started when the consumption of water in the building is low or reaches zero is shown, the regeneration may be performed at night or at every predetermined time. Alternatively, it may be started when the electrical conductivity of water, which is proportional to the concentration of bacteria, exceeds a predetermined range. Furthermore, electric heater other heat sources and a heat device or the like using a rather good are also septic tank detachment means for the regeneration of the hot water production tank
Instead of the hot water but it may also be using superheated steam as.

Claims (4)

[Claims] 1. A water storage tank for temporarily storing supply water, a circulation pipe having each end connected to the water storage tank, a pump installed in the circulation pipe, and a circulation pipe installed in the circulation pipe. A water purification system, which comprises a septic tank with a built-in filter material. 2. The water purification system according to claim 1, wherein an ozone outlet of the ozone generator is connected to a circulation line. 3. An adsorbent is arranged in the septic tank, and a bypass pipe branching from the pump outlet side of the circulation pipe through a passage switching valve to the septic tank and a bypass pipe are provided. 3. The water purification system according to claim 1 or 2, further comprising: a hot water generating tank with a heater, and a drainage pipe for discharging water in the septic tank. 4. A sterilizing lamp capable of irradiating ultraviolet rays is arranged in a septic tank, and a catalyst containing platinum group oxide and oxide ceramics as main components is arranged around the sterilizing lamp. The water purification system according to claim 3.