JP2002332667A - Method for purifying and feeding raw water - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for purifying and feeding raw water, which combines automatic feeding of raw water from an absorption tank, and natural feeding of rainwater on a roof floor. SOLUTION: A purifying device for use in the method, is a combination of a filter 4 and a cyclone 5, and has a bypassing automatic valve 6 and a backwash automatic valve 7. In automatic feeding of water, an intake pump 3 and the automatic valves 6, 7 are interlocked to each other, and feeding operation is automatically controlled between feedwater levels a, b, to thereby purify and feed water. In backwashing, the backwash automatic valve 7 is activated upon stoppage of the intake pump 3, and the valve 7 is restored based on a timer. In natural feeding of water, rainwater stored on the roof floor is introduced into the cyclone 5, and sand, dust, etc., are removed from the water, followed by feeding the rainwater via the bypass automatic valve 6 into a feedwater tank 8. Surplus water is introduced into an intake tank 2. The intake tank 2 stores introduced raw water therein, prevents backflow of water, sets an overblow 10 at the highest location, and stores rainwater therein, to thereby serve as a water storage tank. By virtue of this method, ground subsidence due to conventional pumping of groundwater can be suppressed, and use of rainwater contributes to relaxation of contamination of a filtering agent and saving of water and electric power, etc. Especially, natural feeding of water is free from an influence of power failure due to a typhoon.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a raw water purification water supply system for supplying raw water from a water absorption tank of a main pump and rainwater on a roof in a simple manner as water for cooling water or the like in a large-sized drainage pumping station. About the law.

[0002]

2. Description of the Related Art Conventionally, service water such as cooling water at a drainage pump station or the like is mainly water and well water. However, water is mainly supplied from well water because of the increase in water pipe installation costs and water charges. They used groundwater. However, pumping of groundwater was banned because of the cause of land subsidence, and water and raw water were unavoidably treated and used.However, neither of these methods was effective due to the drawback of increased facility and maintenance costs. .

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide an automatic water supply system for purifying and supplying raw water such as a water suction tank (1) of a pump, and a natural water supply system for purifying rainwater on a roof and supplying water. It is an object of the present invention to provide a raw water purification and water supply method which is used together by various means.

[0004]

In order to achieve the object of the present invention, a purifying apparatus integrates a filter (4) and a cyclone (5). Automatic bypass valve (6) for filter (4)
The cyclone (5) is provided with an automatic backwash valve (7), which is linked with the water intake pump (3). The automatic water supply automatically controls the operation of the water intake pump (3) by setting the water level (a) of the water supply tank (8) to "OFF" (b) and "ON" to operate the water intake pump (3). The suspended matter is filtered by the vessel (4) and supplied to the water supply tank (8). In backwashing, the automatic backwashing valve (7) is opened at the same time when the water intake pump (3) is stopped, and after the backwashing, the timer is restored by the timer. Water is supplied by automatically repeating the above operations. During rainfall, natural water is supplied to the rooftop when the intake pump (3) is stopped. Rainwater on the roof is introduced into the cyclone (5) to prevent backflow, remove sand and dust, etc., and pass water through the automatic bypass valve (6). Fill the water tank (8) with less loss. The control is performed by a ball tap (9) of the terminal, and surplus water is introduced into the water intake tank (2). The water intake tank (2) introduces raw water from the water absorption tank (1) of the pump to prevent backflow. The overblow (10) is provided at the highest position from the raw water level, and rainwater is introduced and stored. The surplus water goes to the water absorption tank (1).

[0005]

According to the present invention, the rainwater on the roof, which is less contaminated than the raw water in the water absorption tank (1) of the pump, is used to the utmost extent. In particular, when the rainfall is large, it is sufficient to supply natural water with rainwater. . The water intake tank (2) in this case stores rainwater as well as raw water. In addition, the raw water in the water intake tank (2) can be used for fire prevention and the like, and the purified water in the water supply tank (8) can be used for agricultural purposes and the like.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described with reference to the system diagram of FIG.

The water intake tank (2) is installed outside the drainage pump station in close contact with the water absorption tank (1) to introduce raw water. In order to store rainwater, a backflow is prevented by a check valve or the like, and an overblow (10) is provided as high as possible from the raw water level to introduce rainwater. In order to return surplus water to the water absorption tank (1), the overblow (10) is connected to a raw water introduction pipe.

[0008] The purification device and the water supply tank (8) are installed above the water intake tank (2). The purifying device integrates a filter (4) and a cyclone (5), and the filter (4) is provided with an automatic bypass valve (6) for the purpose of reducing head loss in natural water supply. Automatic backwash valve (7) on discharge side for cyclone (5)
Is provided. Opening and closing of the automatic valves (6, 7) are linked with closing when the water intake pump (3) is ON and opening when OFF. Raw water pipe (1
3) Prevent backflow to the rainwater pipe (14) with a check valve or the like.

In the automatic water supply, raw water is pressure-fed to a cyclone (5) by an intake pump (3) to precipitate sediment, and the suspended matter is filtered and supplied to a water supply tank (8). Intake pump (3)
Automatic operation of the float switch (1) of the water tank (8)
5) Water supply at low water level (b), stop at high water level (a), backwash, return to original by timer, etc., and repeat the above operation. The backwash water is passed through a strainer (16) and an intake tank (2)
Return to

[0010] Natural water supply during rainfall is performed by removing water and dust by natural pressure while the intake pump (3) is stopped, and supplying water from rooftop rainwater as a water source. Therefore, head loss must be reduced. . As means for this, rainwater is introduced into the cyclone (5) to remove dust and the like, and water is supplied via a bypass automatic valve (6). The control is performed by a ball tap (9) of the terminal. Surplus rainwater is introduced into the water intake tank (2) by the overblow (11). When typhoons and heavy rainfall are heavy, only natural water supply is sufficient. The overblow (12) of the water supply tank (8) connects to the water intake tank (2).

Since the drainage pump stations differ in the degree of contamination of the raw water, the quality and quantity of the filtering agent are arbitrarily set. A chemical injection device is installed as needed.

Although not shown, the cooling method based on the raw water purification water supply method is arbitrarily set at each drainage pump station. For example, a circulation system in which hot water is cooled by a cooler and returned to a water supply tank (8), a system in which hot water is discarded in a water absorption tank (1), a method in which hot water is returned to a water absorption tank (2), and a water absorption tank ( This is a method of discarding in 1).

[0013]

As described above, according to the present invention, the automatic water supply by purifying the raw water in the water absorption tank (1) and the natural water supply by purifying the rainwater on the roof are used in combination. . Therefore, the removal of deep well pumps for pumping groundwater and the suppression of land subsidence associated with the pumps have been eliminated. The suction pressure is zero, and the cooling water pump is eliminated by using the engine built-in pump. Use of rainwater to reduce contamination of filter media and save water. By the above, reduction of power consumption and maintenance cost, etc. In particular, natural water supply is the safest and most reliable in drainage pump stations for emergency use and flood control because it is not affected by power failures caused by typhoons with heavy rainfall.

[Brief description of the drawings]

FIG. 1 is a system diagram showing a preferred embodiment of a raw water purification water supply method according to the present invention. Although the water intake tank 2 is shown on the discharge side of the pump, it is installed along the side surface of the water absorption tank 1 in practice.

[Explanation of symbols]

1 ... water absorption tank, 2 ... water intake tank, 3 ... water intake pump,
4: Filter, 5: Cyclone, 6: Automatic bypass valve, 7: Automatic backwash valve, 8: Water supply tank, 9: Ball tap, 10: Over blow (water intake tank),
11: overblow (rainwater pipe), 12: overblow (water supply tank), 13: raw water pipe, 14: rainwater pipe,
15 ... Float switch, 16 ... Strainer, a ...
High

Claims (3)

[Claims] 1. Automatic water supply for automatically purifying raw water from a pump suction tank or the like with a water pump and supplying water as natural water for cooling water or the like, and natural water supply for removing rooftop rainwater dust and the like to supply water. Raw water purification and water supply law that specializes in the use of 2. The purifying apparatus is provided with an automatic bypass valve and an automatic backwash valve by integrating a filter and a cyclone, and automatically supplies raw water in an intake tank by automatically purifying rainwater on a rooftop. 2. The raw water purification and water supply method according to claim 1, wherein 3. The water intake tank is characterized in that raw water is introduced from a water absorption tank or the like of a pump to prevent backflow, an overplow is provided at the highest level from the raw water level, and rainwater is introduced to also serve as water storage. 1. Raw water purification water supply method.