Raw water distribution and supply equipment

Abstract

To improve the accuracy of raw water distribution with a simple configuration. [Solution] A raw water distribution and supply equipment 100 that distributes and supplies raw water from a raw water tank 1 to a plurality of devices 6, 7, and 8 is provided, characterized in that it includes a water level adjustment tank 2 that stores raw water sent from the raw water tank 1 at a set water level, a flow rate control device 11 (flow meter 10, control valve v1) that controls the flow rate of raw water so as to maintain the set water level of the water level adjustment tank 2, and flow rate adjustment tanks 3, 4, and 5 that are connected to the water level adjustment tank 2 to maintain the same water level as the set water level of the water level adjustment tank 2, and also include overflow tanks 32, 42, and 52 that adjust the flow rate of raw water from the water level tanks 31, 41, and 51 by weirs 33, 43, and 53, and the flow rate adjustment tanks 3, 4, and 5 are provided on the upstream side of the devices 6, 7, and 8, respectively.

Description

Technical Field

[0001] The present invention relates to water purification equipment, and concerns a raw water distribution and supply facility that distributes and supplies raw water to a plurality of devices.

Background Art

[0002] As a raw water distribution and supply facility, there is known a device that equally distributes raw water by providing a plurality of weirs around a distribution tank for distributing raw water. For example, as shown in Patent Document 1, there is disclosed a raw water distribution device that equally distributes and supplies the raw water to a plurality of separation devices for separating chromite from chromite-containing slurry (hereinafter referred to as raw water). This device includes a substantially cylindrical distribution tank in which a plurality of vertically movable weirs are provided at equal intervals in the circumferential direction in the same number as the plurality of separation devices, and an agitator provided at the center of the distribution tank, wherein the supply parts of the plurality of separation devices are located below the upper ends of the plurality of weirs when the plurality of weirs are positioned at the lowermost position.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] According to Patent Document 1, the distribution of raw water from the distribution tank to the plurality of separation devices can be made uniform. However, in Patent Document 1, for example, when only one weir among the plurality of weirs is moved to increase the supply amount, the raw water supply amount differs from that of the other weirs, which causes a change in the water level in the distribution tank, resulting in a water level gradient that slopes toward the weir with the increased supply amount. Due to this water level gradient, the uniform distribution of the other weirs is disrupted, and there is a problem that raw water with an accurate flow rate cannot be supplied. This problem can sometimes be solved by using flow meters and control valves for individual distribution. However, this would require installing flow meters and control valves individually for multiple devices supplying raw water, complicating maintenance of these devices and requiring a significant amount of time. Furthermore, flow meters and control valves are expensive, leading to increased equipment costs.

[0005] This invention has been made in view of the above circumstances, and aims to provide a raw water distribution and supply system that improves the supply accuracy of raw water distribution with a simpler configuration than conventional systems. [Means for solving the problem]

[0006] To achieve the above objective, the present invention provides a raw water distribution and supply system for distributing and supplying raw water from a raw water tank to a plurality of devices, comprising: a water level adjustment tank for storing raw water supplied from the raw water tank at a set water level; a flow rate control device for controlling the flow rate of the raw water so as to maintain the set water level of the water level adjustment tank; and a flow rate adjustment tank which is connected to the water level adjustment tank to maintain the same water level as the set water level of the water level adjustment tank, and also includes an overflow tank for overflowing raw water from the water level tank by adjusting the flow rate with a weir, wherein the flow rate adjustment tank is provided on the upstream side of each of the devices.

[0007] In the configuration of this invention, a flow rate adjustment tank is provided upstream of each of the multiple devices to which raw water is supplied. The water level tank of each flow rate adjustment tank maintains the same water level as the set water level of the water level adjustment tank, and the set water level of the water level adjustment tank is maintained by a flow rate control device. As a result, even if the flow rate of raw water supplied from each flow rate adjustment tank to each device differs, the flow rate adjustment tank is independent for each device and does not affect other flow rate adjustment tanks. Furthermore, each water level tank and the water level adjustment tank are connected, maintaining the same water level as the set water level of the water level adjustment tank. The water level adjustment tank's set water level is maintained by the flow rate control device, which prevents a gradient from forming in the water level of the water level adjustment tank. Therefore, the supply accuracy of raw water distribution can be improved. In addition, since there is no need to use flow meters and control valves individually upstream of each device, the configuration is simpler, simplifying maintenance and reducing maintenance work time.

[0008] Furthermore, the aforementioned plurality of devices are characterized by being high-depth ozone contact devices.

[0009] According to this, because the installation area of ​​the deep-depth ozone contact device is small, the degree of freedom in installing the flow rate adjustment tank provided for the deep-depth ozone contact device can be improved. [Effects of the Invention]

[0010] According to the present invention, the supply accuracy of raw water distribution can be improved with a simple configuration. [Brief explanation of the drawing]

[0011] [Figure 1] This is a schematic plan view of the raw water distribution and supply equipment of this embodiment. [Figure 2] This is a schematic side view of the raw water distribution and supply equipment of this embodiment. [Figure 3] (a) to (c) are diagrams illustrating the shape of the weir. [Figure 4] This is a schematic diagram of a comparative example raw water distribution and supply facility. [Modes for carrying out the invention]

[0012] Embodiments of the present invention will be described in detail with reference to the drawings as appropriate.

[0013] [composition] As shown in Figures 1 and 2, the raw water distribution and supply equipment 100 distributes and supplies raw water to multiple devices and comprises a raw water tank 1, a water level adjustment tank 2, a flow rate control device 11, and flow rate adjustment tanks 3, 4, and 5. Each of the flow rate adjustment tanks 3, 4, and 5 is provided for each of the devices 6, 7, and 8. For the sake of illustration, in Figure 2, the flow rate adjustment tanks 4 and 5 and devices 7 and 8 are omitted from the illustration, and only flow rate adjustment tank 3 and device 6 are shown.

[0014] The raw water tank 1 stores raw water, which is supplied via piping t1. A pump 9 and a flow rate control device 11 are installed in piping t2 that sends the raw water from the raw water tank 1 to the water level adjustment tank 2. The pump 9 is for sending the raw water from the raw water tank 1 to the water level adjustment tank 2. The flow rate control device 11 is a device that controls the flow rate of raw water sent from the raw water tank 1 to the water level adjustment tank 2, and comprises a flow meter 10, a control valve v1, and a control unit (not shown). The flow meter 10 and the control valve v1 are electrically connected to the control unit (not shown), and the flow rate of the raw water is controlled by operating the control valve v1 while feeding back data from the flow meter 10.

[0015] The water level adjustment tank 2 stores the raw water supplied from the raw water tank 1 at a predetermined set water level, which is maintained by the flow rate control device 11. To maintain this set water level, the flow rate F1 of the raw water supplied to the equipment 6, 7, and 8 is calculated, and the control valve v1 is controlled so that the value of the flow meter becomes the flow rate F1. Alternatively, a water level sensor may be installed in the water level adjustment tank 2 so that when the liquid level falls below the set water level, the control valve v1 is opened to increase the flow rate of the raw water, and conversely, when the liquid level rises above the set water level, the control valve v1 is closed to decrease the flow rate of the raw water.

[0016] The flow rate adjustment tank 3 includes a water level tank 31 located on the upstream side and an overflow tank 32 located on the downstream side, and a weir 33 is provided on the shared wall of the water level tank 31 and the overflow tank 32. Raw water in the water level tank 31 flows to the overflow tank 32 via the weir 33, and the flow rate can be adjusted by the height and shape of the weir.

[0017] The water level tank 31 communicates with the water level adjustment tank 2 via a pipe t3, and the water level in the water level tank 31 is maintained at the same level as the set water level of the water level adjustment tank 2 (both water levels are at the same height position) by the communication between the water level tank 31 and the water level adjustment tank 2. The pipe t3 is provided to communicate the bottom of the water level tank 31 and the bottom of the water level adjustment tank 2.

[0018] The overflow tank 32 receives the raw water that has overflowed the weir 33, and the raw water in the overflow tank 32 is supplied to the device 6 via a pipe t6.

[0019] The weir 33 is constituted by a plate-shaped member, and can adjust the flow rate of the overflowing raw water by changing the water level of the water level tank 31 and the height position of the weir 33. Further, as shown in Fig. 3(a), a notch (drinking port) 34a may be provided in the weir 33. The flow rate can be adjusted by changing the size and shape of the notch 34a of the weir 33. The notch 34b of the weir 33 in Fig. 3(b) has a rectangular shape similar to the notch 34a, but has a larger opening amount than the notch 34a. The notch 34c of the weir 33 in Fig. 3(c) has a triangular shape. The weir 33 may adjust the flow rate of the overflowing raw water by replacing such notches 34a, 34b, 34c. Note that the weir 33 may be a movable weir that moves up and down.

[0020] As shown in Fig. 1, the flow rate adjustment tank 4 has the same configuration as the flow rate adjustment tank 3 except for the installation position, and is installed in parallel with the flow rate adjustment tank 3. The flow rate adjustment tank 4 includes a water level tank 41 located on the upstream side and an overflow tank 42 located on the downstream side, and a weir 43 is provided on the shared wall of the water level tank 41 and the overflow tank 42.

[0021] The water level tank 41 communicates with the water level adjustment tank 2 via a pipe t4. By virtue of the communication between the water level tank 41 and the water level adjustment tank 2, the water level in the water level tank 41 is maintained at the same level as the set water level of the water level adjustment tank 2 (the two water levels are at the same height position). The pipe t4 is provided to communicate the bottom of the water level tank 41 and the bottom of the water level adjustment tank 2.

[0022] The overflow tank 42 receives the raw water that has overflowed the weir 43, and the raw water in the overflow tank 42 is supplied to the apparatus 7 via a pipe t7.

[0023] Since the weir 43 has the same configuration as the aforementioned weir 33, a detailed description thereof will be omitted.

[0024] As shown in Figure 1, the flow rate adjustment tank 5 has the same configuration as the flow rate adjustment tank 3 except for the installation position, and is installed in parallel with the flow rate adjustment tanks 3 and 4. The flow rate adjustment tank 5 includes a water level tank 51 located on the upstream side and an overflow tank 52 located on the downstream side, and a weir 53 is provided on the shared wall of the water level tank 51 and the overflow tank 52

[0025] The water level tank 51 communicates with the water level adjustment tank 2 via a pipe t5. By virtue of the communication between the water level tank 51 and the water level adjustment tank 2, the water level in the water level tank 51 is maintained at the same level as the set water level of the water level adjustment tank 2 (the two water levels are at the same height position). The pipe t5 is provided to communicate the bottom of the water level tank 51 and the bottom of the water level adjustment tank 2.

[0026] The overflow tank 52 receives the raw water that has overflowed the weir 53, and the raw water in the overflow tank 52 is supplied to the apparatus 8 via a pipe t8.

[0027] Since the weir 53 has the same configuration as the aforementioned weir 33, a detailed description thereof will be omitted.

[0028] Equipment 6, 7, and 8 are deep-depth ozone contact devices that sterilize, deodorize, decolorize, and decompose organic matter by bringing ozone into contact with raw water. Deep-depth ozone contact devices have a U-shape when viewed from the side, and by increasing the height distance, they secure a large contact area between raw water and ozone, while also allowing for a relatively small installation area. In other words, deep-depth ozone contact devices can perform ozone treatment efficiently in a limited installation area.

[0029] As shown in Figure 2, the device 6 is equipped with an ozone generator 61 and an ozone treatment device 62. The ozone generated by the ozone generator 61 is brought into contact with the raw water flowing in from the overflow tank 32, and the ozone-treated raw water is sent to the outside via piping t9. The used ozone is recovered by the ozone treatment device 62.

[0030] As shown in Figure 2, the height of the inlet 6a of equipment 6 is set lower than the height of the outlet 32a of the overflow tank 32. In other words, the raw water from the overflow tank 32 flows into equipment 6 by gravity without the need for a pump or other means. Equipment 7 and 8 have the same configuration as equipment 6. Furthermore, the arrangement of flow control tank 4 and equipment 7, and flow control tank 5 and equipment 8 are the same as the arrangement of flow control tank 3 and equipment 6, so their explanation is omitted.

[0031] As shown in Figures 1 and 2, according to the raw water distribution and supply equipment 100, raw water from raw water tank 1 is supplied to water level adjustment tank 2 via piping t2, and the water level in water level adjustment tank 2 is maintained at a set level by a flow rate control device 11 installed in piping t2. The raw water from water level adjustment tank 2 is branched by piping t3, t4, and t5 and supplied to flow rate adjustment tanks 3, 4, and 5. By connecting the water level tanks 31, 41, and 51 of flow rate adjustment tanks 3, 4, and 5 with water level adjustment tank 2 via piping t3, t4, and t5, the water levels in water level tanks 31, 41, and 51 are maintained at the same level as the set water level in water level adjustment tank 2. The raw water from water level tanks 31, 41, and 51 overflows through weirs 33, 43, and 53 and flows into overflow tanks 32, 42, and 52, and is distributed and supplied to equipment 6, 7, and 8 via piping t6, t7, and t8. In this embodiment, high-depth ozone contact devices were used as equipment 6, 7, and 8, but other ozone contact devices or devices other than ozone contact devices may also be used.

[0032] [Comparative Example] Here, we will describe the raw water distribution and supply equipment (conventional equipment) related to the comparative example. As shown in Figure 4, the raw water distribution and supply equipment 200 related to the comparative example is equipment that distributes and supplies raw water from a raw water tank to multiple devices, and comprises a raw water tank 1 and devices 6, 7, and 8.

[0033] A pump 9 is installed in piping t2 connected to raw water tank 1, and piping t2 and equipment 6 are connected by branch pipe t12. Similarly, piping t2 and equipment 7 are connected by branch pipe t13, and piping t2 and equipment 8 are connected by branch pipe t14. A flow meter 91 and control valve v9 are installed in branch pipe t12. Similarly, a flow meter 92 and control valve v10 are installed in branch pipe t13, and a flow meter 93 and control valve v11 are installed in branch pipe t14.

[0034] In the raw water distribution and supply equipment 200, flow meters 91, 92, and 93 and control valves v9, v10, and v11 are provided upstream of equipment 6, 7, and 8, respectively, so that the flow rate can be adjusted using each flow meter and control valve and the raw water can be distributed. However, in the comparative example, flow meters 91, 92, and 93 and control valves v9, v10, and v11 must be installed for each of the devices 6, 7, and 8. In this configuration, maintenance of the flow meters and control valves must be performed for each device, which presents a problem of complicated maintenance work. Furthermore, since flow meters and control valves are relatively expensive devices, there is a problem of increased equipment costs.

[0035] [effect] In contrast, according to the raw water distribution and supply equipment 100 of this embodiment, flow rate adjustment tanks 3, 4, and 5 are provided upstream of each of the multiple devices 6, 7, and 8 to which raw water is supplied. The water level tanks 31, 41, and 51 of each flow rate adjustment tank 3, 4, and 5 and the water level adjustment tank 2 are connected by pipes t3, t4, and t5 to maintain the same water level, and the set water level of the water level adjustment tank 2 is maintained at the set water level by the flow rate control device 11. As a result, even if the flow rates of the raw water supplied from each flow rate adjustment tank 3, 4, and 5 to each device 6, 7, and 8 are different, the flow rate adjustment tanks 3, 4, and 5 are separate and independent for each device 6, 7, and 8, so they do not affect the other flow rate adjustment tanks 3, 4, and 5. Furthermore, each of the water level tanks 31, 41, and 51 and the water level adjustment tank 2 are connected, so that the water levels in each of the water level tanks 31, 41, and 51 and the set water level in the water level adjustment tank 2 are maintained at the same level. The flow rate control device 11 maintains the set water level in the water level adjustment tank 2, thereby preventing a gradient from forming in the water level of the water level adjustment tank 2.

[0036] In other words, even if the flow rates of raw water supplied from each flow adjustment tank 3, 4, and 5 to equipment 6, 7, and 8 are different (for example, if the heights of weirs 33, 43, and 53 are different), raw water is supplied from water level adjustment tank 2 to water level tanks 31, 41, and 51 so that the water levels in each water level tank 31, 41, and 51 remain at the same level as the set water level in water level adjustment tank 2. The set water level in water level adjustment tank 2 is maintained by the flow control device 11 supplying raw water from raw water tank 1 to water level adjustment tank 2. This prevents a gradient from forming in the water level of water level adjustment tank 2. Therefore, the supply accuracy of raw water distribution can be improved. In addition, since there is no need to use flow meters and control valves individually on the upstream side of each piece of equipment 6, 7, and 8, the configuration is simpler, simplifying maintenance and reducing maintenance work time.

[0037] Furthermore, in this embodiment, the flow rate of raw water supplied to devices 6, 7, and 8 can be easily controlled solely by the overflow rate of raw water through weirs 33, 43, and 53. The weirs 33, 43, and 53 can be adjusted by adjusting their height or by adjusting the size and shape of the notches (drinking spouts) 34a, 34b, and 34c. The overflow rates of weirs 33, 43, and 53 may all be the same or different.

[0038] Furthermore, since no power sources such as pumps are used between the flow control tanks 3, 4, and 5 and the equipment 6, 7, and 8, equipment costs and maintenance costs can be reduced.

[0039] Furthermore, because the installation area of ​​the high-depth ozone contact devices 6, 7, and 8 is small, the flexibility in installing the flow rate adjustment tanks 3, 4, and 5 provided for the high-depth ozone contact devices can be improved.

[0040] [Differentiation] When applying the present invention, design modifications can be made as appropriate, provided they do not contradict the spirit of the invention. For example, the number of devices that receive raw water distribution is not limited to three; it may be two, four or more, or any number of devices.

[0041] Furthermore, the distribution of raw water from flow control tanks 3, 4, and 5 is not limited to equal distribution; for example, it may be unequal distribution. For instance, by setting the size ratio of the notches (drinking ports) 34a, 34b, and 34c provided in weirs 33, 43, and 53 to 2:1:1, the ratio of the raw water flow rates supplied to equipment 6, 7, and 8 can be set to 2:1:1. By using unequal distribution, the options for raw water distribution can be expanded, and the desired raw water distribution can be achieved.

[0042] Furthermore, maintenance valves may be provided in the upstream piping t3, t4, and t5 of each flow rate adjustment tank 3, 4, and 5. Also, for example, level gauges may be provided in the water level adjustment tank 2 and the water level tanks 31, 41, and 51. By checking each level gauge, it is possible to monitor whether the set water level of the water level adjustment tank 2 and the water levels of the water level tanks 31, 41, and 51 are maintained at the same level. . This embodiment is merely illustrative and does not limit the present invention. Furthermore, each embodiment can be combined as appropriate. [Explanation of symbols]

[0043] 100 Raw water distribution and supply equipment 1. Raw water tank 2 Water level adjustment tank 3,4,5 Flow rate adjustment tank Machines 6, 7, and 8 9 ポンプ 10 Flow Meters 31, 41, 51 Water level tanks 32, 42, 52 Crossflow channels 33,43,53 Weir

Claims

1. In a raw water distribution and supply system that distributes and supplies raw water from a raw water tank to multiple devices, A water level adjustment tank that stores raw water supplied from the raw water tank at a set water level, A flow rate control device that controls the flow rate of the raw water so that the set water level in the water level adjustment tank is maintained, The flow rate adjustment tank comprises a water level tank connected to the water level adjustment tank to maintain the same water level as the set water level of the water level adjustment tank, and an overflow tank that adjusts the flow rate from the water level tank by a weir and allows raw water to overflow, The raw water distribution and supply equipment is characterized in that the flow rate adjustment tanks are provided on the upstream side of each of the devices.

2. The raw water distribution and supply equipment according to claim 1, characterized in that the plurality of devices are high-depth ozone contact devices.

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