JPS58190579A - Energy collection device - Google Patents

Abstract

PURPOSE:To enhance the efficiency of energy collection by simple constitution, in an arrangement in which the liquid energy in liquid pipelines is collected in the form of electrical energy converted by a generating means coupled with a hydraulic wheel, by putting the upper and lower flow parts of said hydraulic wheel in communication with a water tank located at a certain specified level. CONSTITUTION:A hydraulic wheel 12 coupled with a generating means (an induction motor) 13 is installed in a liquid pipeline (main pipe) 11 to be equipped at a steel making yard etc., and the bottoms of No.1, No.2 lines 14, 15 stretching in the vertical direction are connected to the upper and lower flow parts 11a, 11b of this hydraulic wheel 12. The tops of these lines 14, 15 are connected in mutual communication through a coupling water tank 16, which is open to the atmosphere at a certain specified level H. This level H shall be such that water exists at least in No.1 line 14 regardless of the varying pressure at the upper flow part 11a of the main pipe 11, and when the increment of the rate of flow at the upper flow part 11a has exceeded the mean pressure, the surplus water shall overflow to No.2 line 15 from the water tank 16.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an energy recovery device for recovering liquid energy in a liquid pipe line installed in an industrial facility such as a steelworks or in a water supply or sewerage facility as electrical energy.

Various energy recovery devices of this type have been proposed in the past, and a representative example is JP-A-56-32078.
There is something disclosed in the issue.

Basically, this energy recovery device, as shown in FIG. A bypass 4 that communicates between the front and rear parts of the well 30 is provided, and a second control valve 5 and a water fL6 disposed downstream thereof are interposed in the bypass 4, so that fluctuations in the flow rate of the fluid pipe line 1 are controlled by the flow rate. The detector 2 detects this, and the control panel 7 controls both the control valves 3 and 5 accordingly, and the water turbine 6 is rotated by the fluid energy of the liquid flowing through the bypass 4, thereby operating the generator 8. The electrical energy is recovered to the power supply bus 9.

Therefore, in such a device, the control valve 3.5 for adjusting the flow rate of the bypass 4 to effectively drive the flow rate detector 2 for detecting the flow rate fluctuation of the liquid pipe line 1 and the water turbine 6 is set to a minimum. However, since the control of the control valve 3.5 by the control panel 7 is extremely complicated, the device becomes extremely expensive and complicated.

The present invention was made in view of the points noted above, and does not require the above-mentioned flow rate detector and control valve, therefore does not require a complicated control system, is inexpensive, and has a simple structure. To provide energy recovery equipment.

In order to achieve the above object, the present invention is characterized by the following configuration. That is, the energy recovery device of the present invention uses the liquid pressure on the upstream side of the liquid flow path to raise the liquid on the upstream side of the liquid flow path through the first pipe, and further raises the liquid on the upstream side of the liquid flow path through the first pipe. Potential energy is given to the downstream side of the liquid pipe line through the pipe to cause it to flow back, thereby driving the water turbine installed in the first pipe line to recover energy by a generator. In response to fluid pressure fluctuations, that is, flow rate fluctuations, the excess liquid used to drive the water turbine is designed to overflow from the upper end connection of the first pipe to the second pipe and return to the downstream side of the liquid flow path. It is something that

An embodiment of the present invention will be described below with reference to the drawings.

Fig. 2 schematically shows the energy recovery device νt according to the present invention, and numeral 11 in the figure is a wooden pipe serving as a liquid conduit installed in a steelworks or the like, and is used when a large amount of water is recycled. It is used.

Reference numeral 12 denotes a water turbine to which a power generation means (induction motor) 13 is interlocked, and is interposed in the main pipe 1 .

14 and 15 are first and second extending in the vertical direction, respectively.
The lower end of the first pipe 14 is connected to the inlet side of the water turbine 12, that is, the end of the upstream portion 11a of the wood pipe 11, and the lower end of the second pipe 15 is connected to the discharge side of the water turbine 12, that is, the end of the upstream portion 11a of the wood pipe 11. It is connected to the end of the downstream portion 11b of the wood pipe 11.

The upper ends of the first and second pipes 14 and 15 are connected to each other via a connecting water tank 16 that is open to the atmosphere at a set height position, and the upper end of the second pipe 15 is 1st
The upper end connecting portion of the pipe line 14 and the connecting water tank 16 are connected. In addition, the installation position of the connecting water tank 16, that is, the height position of the upper end connecting portion of the first and second pipe lines 14.15, depends on the fluid pressure of the upstream portion 11a of the main pipe 11, especially when pressure fluctuations are predicted. If so, it is set according to the average pressure of the fluctuating fluid pressure.

That is, in response to pressure fluctuations in the upstream portion 11a of the main pipe 11, water is present in at least the first conduit 14. Therefore, the upstream portion 11 of the wood pipe 11
The water in a is drained away in one first pipe 14, but when the pressure rises in the upstream portion 11a of the wood pipe 11, that is, the increase in flow rate exceeds the average pressure, the required flow rate of water is drained from the connected water tank 16. At the same time as the people are drained away through the first pipe 14, the surplus water other than the required flow is overflowed from the connecting water tank 16 to the second pipe 15, and the second pipe 15 has an almost constant amount of water, which is the planned water volume. It is designed to allow water to flow.

The water turbine 12 is selected so that the power generating means 13 can be operated near the maximum efficiency point under the conditions of the effective actual head H secured by the first pipe line 14 and the planned water amount.

17 is a gate valve interposed between the inlet side of the water turbine 12 and the first pipe line 14; 18 is the upper and downstream portion 11a of the wood pipe 11;
A gate valve installed in the bypass 19 that connects brwJ,
20 is a rotation detector of an output contact material that detects the rotation speed (or number of rotations) of the water turbine 12 and the power generation means 13; 21 is a power supply bus connected to the power generation means 13 via a switch 22; and 23 is a rotation The control panel controls the opening and closing of the switch 22 in response to a signal from the detector 20, and controls the switch 22 to open when the rotational speed of the water turbine 12 becomes lower than the set rotational speed of the power generation means 13. Next, the energy recovery effect of the energy recovery device according to the present invention will be explained with reference to the above embodiment.

4. When the gate valve 17 on the inflow side of the water turbine 12 is opened and the gate valve 18 of the bypass 19 is closed, the main pipe 1
The water in the upstream portion 11a of the wood pipe 11 ascends the first pipe line 14, maintains the water level in the connected water tank 16, and is returned to the downstream portion 11b of the wood pipe 11.

At this time, the water level of the connecting water tank 16 changes in accordance with the pressure fluctuations in the upstream portion 11a of the wood pipe 11, that is, the flow rate fluctuations.
and the upper end of the second conduit 15, &. Furthermore, when the increase in the flow rate in the upstream portion 113 of the wood pipe 11 is large, the water level in the connecting water tank 16 tends to rise, but all the excess water is overflowed from the north end of the second pipe 15 and is discharged from the main pipe 11. Therefore, the water flowing through the first conduit 14 always has a substantially constant planned water phase, regardless of flow fluctuations in the upstream portion 11a of the wood pipe 11. 1 Furthermore, the upstream portion 1 of the main pipe 11
When the decrease in the flow rate of 1a is large, the water level in the connected water tank 16 is divided and the water level falls in the first pipe 14, but the water in the wood pipe 11 is
First pipe line 14f: It can be poured into the water wheel 12 through the first pipe line 14f.

Therefore, the water turbine 12 is always driven at the set rotational speed of the power generation means 13 which is below the maximum efficiency point and is tuned to the frequency of the power supply bus 21. The power generation means 13 is activated by this, and power is supplied to the power supply bus 21, that is, electrical energy is recovered.

As described above, according to the energy recovery device of the present invention, even when pressure fluctuations or flow rate fluctuations occur in the upstream portion 11a of the main pipe 11, the control system using the flow rate detector and control valve as described at the beginning can be used. Energy can be recovered without any need for.

In addition, by setting the installation position of the connecting water tank 16 @ Takara according to the predicted average pressure of the upstream side portion 11a of the main pipe 11, water is always transferred from the upstream side portion 11a to the first pipe line 14. Furthermore, people will be washed away from the connected water tank 16,
When the fluid pressure in the upstream portion 11a of the main pipe 11 drops below the average pressure and the rotational speed of the water turbine 12 becomes lower than the set rotational speed of the power generation means 13, the control panel 23 turns the switch 22 on.
By operating the FF and turning on the switch 22 when the power generation means 13 reaches the required rotation speed, it is possible to recover power that can be synchronized with the frequency of the power supply bus 21.

In this case, open the gate valve 18 to divert the flowing water to bypass 1.
It is also possible to flow to the downstream part of the main pipe 11, 1 city, via the pipe 9.

Furthermore, if there is no limitation on the frequency used for the power bus, the energy recovery device of the present invention is configured to be able to supply water to the water turbine 12 even if the water level in the first conduit 14 falls. The water level of the effective head capable of generating power of means 13,
Fluid energy can be recovered as electrical energy up to the flow rate.

Furthermore, when stopping the drive of the water turbine 12, the gate valve 17
All you have to do is close it. In this way, the water brought from the first pipe line 14 to the connecting water tank I6 is transferred from the second pipe line 15 to the main pipe 1.
1 flows out to the downstream portion 11b of 1. In this way, the water turbine 12 can be operated and stopped simply by opening and closing the gate valve 1. Furthermore, when maintaining or inspecting the connected water tank 16 or the like, the gate valve 18 may be opened to allow water to flow out from the bypass 19 to the downstream portion 11b of the main pipe 11.

In the embodiment described above, the first and second pipes 14. , -15 are connected for communication, but in order to overflow and discharge excess water from the second pipe line 15, it is sufficient that at least the upper end part of the second pipe line 15 is open to the atmosphere. Therefore, it is possible to connect the first and second pipes as shown in FIG. 3, for example. That is, the upper ends of the first and second pipe lines 14.15 are directly connected, and the second pipe line 1
5 may be provided with an opening 15a'i to the atmosphere side. In this case, each of the pipes 14 and 15 can also be used as a support column for a water tank or the like.

As is clear from the above description, the energy recovery device of the present invention has a first pipe 1 which has a water wheel interlockingly connected to a power generation means in a fluid pipe line, and whose lower end is connected to the inflow side of the water wheel.
9, and a second pipe line whose lower ends are fully connected to the discharge side of the water turbine is provided, the north ends of these first and second pipes are connected to each other at a set height position, and the upper end of this communication connection is Since the part is opened to the atmosphere, there is no need for a flow rate detector or a control valve as in the conventional device mentioned at the beginning, and there is no need for a complicated control system.
Regardless of the pressure fluctuations on the upstream side of the gt body pipe, fluid energy can be recovered as electrical energy, and the cost of the device can be reduced and the structure can be simplified effectively.

[Brief explanation of the drawing]

FIG. 1 is a schematic side view showing a conventional energy recovery device, FIG. 2 is a schematic side view showing one embodiment of the energy recovery device according to the present invention, and FIG. 3 is a schematic side view showing another embodiment. FIG. 3 is a schematic vertical cross-sectional view of the main part. 11・Main pipe (liquid pipe), lla ・Upstream side part of wood pipe (inflow side of water wheel), llb Downstream side part of wood pipe (discharge side of water wheel), 12 ・Water wheel, 13 Power generation means, 14 1st pipe Route, 15...Second pipeline. Patent applicant: Kubota Tekko Co., Ltd. Representative patent attorney: Takashi Suzue −

Claims (1)

[Claims] A water wheel to which a power generating means is interlocked and connected to the fluid pipe is interposed, a first pipe whose lower end is connected to the inflow side of the water turbine, and a second pipe whose lower end is connected to the discharge side of the water turbine. An energy recovery device characterized in that the upper end portions of these eleventh second conduits are connected to each other at a set height position 10, and the upper end portions of this communication connection are opened to the atmosphere.