JPH05192512A - Water purifying plant - Google Patents

Abstract

PURPOSE:To efficiently mix a pH control agent or a flocculant with water by circulating the water in a sedimentation basin up and down by convection by arranging an intermittent pneumatic pumping-up device in the sedimentation basin constituted by successively connecting a pH adjusting tank, a flocculant mixing tank and a sedimentation tank. CONSTITUTION:A sedimentation basin 1 is constituted of a pH adjusting tank 15, a flocculant mixing tank 16 and sedimentation tanks 17a, 17b and intermittent penumatic pumping up devices 19 are arranged to the almost central parts of both tanks 15, 16 and, by circulating the water in both tanks up and down by convection, a pH control agent (e.g. high concn. limewater) and a polymeric flocculant are mixed. Solid particles suspended in water are properly flocculated to be passed through the sedimentation tanks 17a, 17b and lose buoyancy during bending flow to settle and the supernatant water enters a filter tank 4 through a communication pipe 2a to be filtered through sand beds 18a, 18b. Next, the filtered water enters a chlorine injection tank 7 and receives the injection of a proper amount of chlorine to be fed from a water feed pipe 68 through a water distributing basin 8.

Description

Detailed Description of the Invention

[0001]

[Industrial field of application] This invention takes water from rivers,
The present invention relates to a fresh water device intended for fresh water for use as clean water.

[0002]

2. Description of the Related Art Conventionally, in order to obtain clean water, the intake water is introduced into a settling tank, a coagulant is injected, the solid matter is precipitated by stirring with a submersible pump or a propeller, and then filtered in a filter tank, followed by chlorine. Water is distributed after disinfection.

[0003]

According to the above-mentioned prior art, since the agitation is insufficient and uneven, the coagulant and other additives are likely to be unevenly mixed, and more than the required amount must be added. Not only does this have to be done, but the precipitation (aggregation) efficiency may also deteriorate. In addition, in agitation using a submersible pump or propeller, the water flow was constant and there was a risk that the agitation efficiency would deteriorate, so multiple agitators were required, and mechanical agitation required corrosion, rusting, abrasion, etc. There was a possibility that various defects of

[0004]

However, in the present invention, since the intermittent air pumping cylinder is installed in the settling basin, unlike the case where an underwater motor or propeller is used, water is vertically convected to circulate and stir the whole tank. However, for pumping water, no mechanical parts, shafts or other objects that rotate in water are used, and since air is used as power, maintenance is unnecessary, and due to the self-cleaning function, cleaning of the pump cylinder is also possible. The above problems of the prior art, such as unnecessaryness, have been alleviated.

That is, the present invention is a fresh water system characterized in that an intermittent air pumping cylinder is installed in a sedimentation basin. The sedimentation basin has one side connected to a water tank and the other side connected to a filtration tank. Next, the sedimentation basin is constituted by sequentially connecting a pH adjusting tank, a collecting agent mixing tank, and a solid matter separating tank. Further, the pH adjusting tank is provided with a lime dissolving tank and an intermittent air pumping cylinder installed in the lime dissolving tank.

As described above, according to the present invention, since the intermittent air pumping cylinder is used, an ascending flow is generated at the location where the pumping cylinder is installed in the tank, and then the direction is changed to the diffusion flow. Since such a water flow is generated intermittently, there is no risk that the water flow in each part will become a steady flow, and since the water is agitated each time bubbles form in the water, a flocculant and other additives are applied to the cylinder part of the pumping cylinder. As a result, they are automatically mixed and diffused. Further, in the present invention, the pH can be automatically adjusted by providing a lime dissolving tank to make high-concentration lime water and automatically feeding an appropriate amount of the lime water to the PH adjusting tank.

In the above description, the pumping cylinder has a cylindrical shape or an inverted pyramidal shape, but in any case, since bubbles and water move at an average flow velocity of about 1 m / sec, the inside of the cylinder or the like is always cleaned. Foreign substances (algae, organic-inorganic solids, microorganisms) that maintain the condition
There is no risk of adhesion. Therefore, in principle, cleaning is unnecessary. Furthermore, since both the pumping cylinder and the air chamber are hollow and no mechanical rotating body or the like is used, there is no possibility of causing a failure. In case of a failure,
It can be easily found by visual inspection in the pumped state, and it is also very easy to find and improve the faulty part, and there is no risk of impeding water supply. Therefore, it is possible to carry out repairs and other improvement work while continuing water supply.

[0008]

According to the present invention, since the intermittent air pumping cylinder is installed in the settling tank, the vertical circulating water flow is generated in the settling tank to expand the sales of all the water and evenly diffuse the additives.

Further, the pumping cylinder can always maintain the same ability by the self-sustaining action. For example, there is no fear that causes such as an increase in the resistance in the pumping cylinder or a decrease in the cross-sectional area will reduce the pumping capacity.

[0010]

Embodiment 1 An embodiment of the present invention will be described with reference to FIGS. The landing tank 3 is connected to one side of the sedimentation tank 1 via the communication pipe 2, and the filtration tank 4 is connected to the other side of the sedimentation tank 1 via the communication pipe 2a. , 6 are used to sequentially connect the chlorine injection tank 7 and the distribution reservoir 8 (FIG. 1). The settling basin 1 includes partition walls 9, 10, 11, 12,
13 and 14, a pH adjusting tank 15, a flocculating tank 16 and settling tanks 17a and 17b. The filtration tank 4
Sand layers 18a, 18b are provided in the bed, and the supernatant water from the settling basin 1 is filtered by these layers.

Further, an intermittent air pumping device 19 is installed in the PH adjusting tank 15 and approximately at the center of the coagulant layer 16, and the water in each tank is indicated by arrows 20, 21, 22, 23, 24. ,
The pH adjuster (for example, high-concentration lime water) and the polymer coagulant are mixed by causing convection in the vertical direction like 25.
The intermittent air pumping device 19 used above has various structures, and the structure and operation will be described with reference to FIG. 3 as an example.

That is, in the water pumping device 19, an air chamber 27 is fitted outside the base cylinder 26. The air chamber 27 is provided with a predetermined gap outside the base cylinder 26, and has an inner cylinder 28, a partition cylinder 29 and an outer cylinder 3.
0 is sequentially fitted, the upper end of the inner cylinder 28 is closed with a top plate 32 between the inner cylinder 28 and the base cylinder 26, and the lower ends of the base cylinder wall, the inner cylinder 28 and the partition cylinder 29 are closed with a bottom plate 33. The cylinder wall and the upper ends of the partition cylinder 29 and the outer cylinder 30 are closed by a top plate 34, and communication holes 35, 36, 37 are provided to the upper part of the base cylinder 26, the lower part of the inner cylinder 28, and the upper part of the partition cylinder 29, respectively. Is provided. Also, the end of the pressurized air feeding hose 38 is connected to the top plate 32. One end of the rope 40 is fixed to the lower end flange 39 of the base cylinder 26, and the weight 41 is connected to the other end of the rope 40.
If the pump is installed on the bottom of the settling basin 1, the pumping device 19 can be installed stably. The base end of the funnel-shaped outer tub 42 is connected to the upper end of the base cylinder 26, and the inverted conical hollow body 43 having a similar external shape is fitted into the outer tub 42 to form an inner wall of the outer tub 42. , A plurality of partition plates 44 between the hollow body 43,
The outer tubs 42 are fixed by arranging 44 radially and equidistantly.
Inner wall, the outer wall of the hollow body 43, and the two partition plates 44, 44
Forms a pumping channel 45. Since the pumping channel 45 extends from the lower part to the upper part in a funnel shape (side surface),
If the space between the inner wall of the outer tub 42 and the outer wall of the hollow body 43 is made uniform, the cross-sectional area of the pumping channel 45 becomes larger toward the upper side, but the cross-sectional area can be made almost constant by adjusting the gap. .. In the above-described embodiment, from the feeding hose 38, the arrow 4
When the pressurized air is sent under pressure as in 6, the pressurized air is
It collects from the inside of 2 and pushes down the water level in the air chamber 27 as shown by the arrow 47. When the water level 34 reaches the communication hole 36, the air in the air chamber 27 passes through the communication holes 35, 36 and 37 as indicated by arrows 48, 49 and 50, and becomes air bubbles 57 to form an upper portion of the base cylinder 1. And then divided by the lower end apex 51 of the hollow body 43 to rise in each pumping channel 45, as shown by the arrow 52, and obliquely upward from its upper end, as shown by the arrow 53, Diffuses in the directions of 20 and 23 (Fig. 1, Fig. 2,
(Figure 3). Therefore, in FIG. 1, arrows 20, 21, 22, 23,
The water is convectively circulated like 24 and 25.

In the above-described apparatus, the water sent from the river or the like to the water landing tank 3 as shown by an arrow 54 is the adjusting tank 15
In, for example, high-concentration lime water
It is sent to the hose 31 of No. 6 as shown by the arrow 56 and mixed in the pumped water. This pumped water is, as described above, the arrow 20, 21,
Since it circulates like 22, 23, 24, 25, it is a short term (it depends on the capacity, but the water amount is, for example, 1000 to 5000).
Tons can be mixed uniformly within 1-2 days). This water is around pH 7.0, and as shown by arrow 58,
6, the coagulant is mixed and diffused by the pumping device 19, so that the solid particles suspended in the water are appropriately aggregated, and the arrow 5
Settling tanks 17a, 1 like 9, 60, 61, 62, 63
When flowing through 7b, the solid matter loses its buoyancy during the bending flow and precipitates, and the supernatant water enters the filtration tank 4 through the communication pipe 2a as indicated by the arrow 64, and the sand layers 18a, 18b.
After being filtered with, the chlorine injection tank 7 enters through the communication pipe 5 as shown by the arrow 65, and an appropriate amount of chlorine is injected therein, and then the distribution reservoir 8 passes through the communication pipe 6 as shown by the arrow 66. Enter, arrow 6
Water is supplied from the water supply pipe 68 as in 7. In this way, continuous continuous water supply is achieved as described above.

[0014]

[Embodiment 2] An apparatus for producing high-concentration lime water in Embodiment 1 will be described with reference to FIGS. The inner cylinder 69 is installed inside the outer tank 55 at a predetermined interval, and the inner cylinder 6 is
An intermittent air pumping device 71 is installed on the bottom plate 70 of No. 9. The perforated cylinder 72 is loosely fitted to the outside of the inner cylinder 69 at a predetermined interval, the lower portions of the perforated cylinder 72 and the inner cylinder 69 are closed by a closing plate 73, and slaked lime is provided between the inner cylinder 69 and the perforated cylinder 72. 74 are accommodated. The perforated cylinder 72 has a mesh cylinder 72b fitted outside the punching metal cylinder 72a. A circulation tank 75 is provided outside one side of the outer tank 55, and an outer wall of the circulation tank 75 is
A drainage port 76 and a feed port 77 are provided above and below, a communication hole 78, 79 is provided above and below in a wall between the outer tub 55, and a water feed port 80 is provided on the other side upper part of the outer tub 55. It is provided and constitutes the lime water manufacturing apparatus 84 (FIG. 4). In the figure, 81 is an air supply hose, and 82 and 83 are cover plates.

Next, the usage of the embodiment will be described. After accommodating an appropriate amount of slaked lime 74 between the inner cylinder 69 of the manufacturing apparatus 84 and the perforated cylinder 72, water is supplied from the water supply port 80 as shown by an arrow 85 (usually, water for which PH should be improved is used). Then, pressurized air is supplied from the air supply hose 81 to the air chamber 87 of the water pumping device 71 as shown by an arrow 86. As shown in FIG. 6, in the air chamber 87, an inner cylinder 89 is loosely fitted to a lower portion of a pumping cylinder 88 at a predetermined interval, and an outer cylinder 90 is loosely fitted to the outside of the inner cylinder 89 at a considerable distance. Then, the outer cylinder 90 and the inner cylinder 8
A partition cylinder 91 is loosely fitted between the outer cylinder 90 and the partition cylinder 91.
And the outer wall of the inner cylinder 89 is closed by a top plate 92, the outer wall of the pumping cylinder 88, the lower end of the inner cylinder 89 and the lower end of the partition cylinder 91 are closed by a bottom plate 93, and the upper part of the partition cylinder 91, the inner cylinder. Communication holes 95, 96, 97 are formed in the wall of the pumping cylinder 88 facing the lower part of 89 and the upper part of the inner cylinder 89, respectively. The top plate 9 is also provided between the upper end of the inner cylinder 89 and the outer wall of the pumping cylinder 88.
4, and an air chamber 87 is formed.

In the above, when the pressurized air is fed into the air chamber 87, the air chamber 87 is proportional to the amount of the pressurized air fed.
The water level inside falls. When the water level reaches the position shown by the chain line in FIG. 6, the air in the air chamber 87 moves as indicated by arrows 98, 99, 100 into the pumping cylinder 88, and the large bubbles 101
And rise as shown by arrow 102.

When the bubble 101 rises as described above, as it rises, water is sucked up from the lower part of the pumping cylinder 88 as shown by the arrow 103, so that the water rises in the pumping cylinder 88,
Arrows 104, 105, 106, 107, 108, 109
To descend. At this time, it contacts slaked lime and becomes alkaline water (slaked lime water). Further, a part of the water descends in the circulation tank 55 as indicated by arrows 110, 111, 112. Therefore, if the hose 31 is connected to the feed port 77, the highly alkaline water (slaked lime water) is supplied into the base cylinder 26 through the hose 31 as shown by the arrow 56.

As described above, when water is circulated in the pumping device 71, the water becomes an unsteady flow and comes into contact with slaked lime, so that it is efficiently dissolved and high alkaline water can be easily produced.

[0019]

EFFECTS OF THE INVENTION Since the intermittent air pumping cylinder is installed in the sedimentation tank, the present invention has an effect that water in the sedimentation tank can be vertically circulated and convected to efficiently adjust the pH and mix the coagulant.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view of an embodiment of the present invention.

FIG. 2 is a partial plan view of the same.

FIG. 3 is also an enlarged vertical sectional front view of the water pumping device.

FIG. 4 is a vertical sectional front view of the slaked lime dissolution tank.

FIG. 5 is a plan view of the same.

FIG. 6 is a vertical cross-sectional view of the water pumping device also used in FIG.

[Explanation of symbols]

 1 settling basin 2, 2a, 5, 6 communication pipe 3 landing tank 4 filtration tank 7 chlorine injection tank 8 distribution tank 15 PH adjusting tank 16 coagulation tank 17a, 17b sedimentation tank 18 sand layer 19 pumping device 26 base cylinder 27 air chamber 28 inside Cylinder 29 Partition Cylinder 30 Outer Cylinder 38 Feed Hose 42 Outer Tank 43 Hollow Body 44 Partition Plate 57 Bubble 68 Water Pipe 69 Inner Cylinder 71 Pumping Device 72 Perforated Cylinder 74 Slaked Lime 75 Circulation Tank 81 Air Supply Hose 84 Slaked Lime Water Manufacturing Device 87 Air chamber 88 Pumping pipe 101 Air bubbles

Claims (5)

[Claims] 1. A fresh water system comprising an intermittent air pumping cylinder installed in a sedimentation basin. 2. The water purifier according to claim 1, wherein one side of the settling basin is connected to the water receiving tank and the other side is connected to the filtration tank. 3. The water purifier according to claim 1, wherein the settling basin comprises a pH adjusting tank, a collecting agent mixing tank, and a solids separating tank, which are sequentially connected. 4. The water purifier according to claim 3, wherein the pH adjusting tank is provided with a lime dissolving tank, and an intermittent air pumping cylinder is installed in the lime dissolving tank. 5. The intermittent air pumping cylinder according to claim 1 or 4, wherein an air chamber for intermittently discharging air is attached to the lower part of the cylindrical body, and the upper part of the cylindrical body is formed into a cylindrical shape or an inverted cone shape. Fresh water equipment.