JPS58190580A - Energy collection device - Google Patents

Abstract

PURPOSE:To ensure effective drive of a hydraulic wheel regardless of the varying pressure in pipelines, in an arrangement in which the fluid energy in fluid pipelines is collected in the form of electrical energy converted by a generating means coupled with a hydraulic wheel, by utilizing a water tank located at a certain specified level. CONSTITUTION:No.1 pipeline 12 stretching in the vertical direction is connected with the upper flow part 11a of a fluid line (main pipe) 11 to be equipped at a steel making yard etc., and the divergent point of the bottoms of No.2, No.3 lines 13, 14 is connected with the lower flow part 11b of this main pipe 11. Tops of these lines 12-14 are connected in mutual communication through a coupling water tank 15, which is open to the atmosphere side. This water tank 15 is located at such a specific level that the water rises in No.1 pipeline 12 to attain the tank 15 regardless of the varying pressure at the upper flow side of main pipe 11. A hydraulic wheel 16 coupled with a generator 17 is installed at the lower flow part of No.2 pipeline 13, and the generator 17 is connected to the source buss bar 22 through a switch 23, which will be opened when the revolving speed of the wheel 16 exceeds the synchronous speed of the generator 17.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is an energy recovery method for recovering fluid energy as electrical energy in fluid pipes installed in industrial facilities such as steel plants, water supply and sewage facilities, etc., and which have a relatively large number of transport flow sections. It is related to the device.

Various energy recovery devices of this type have been proposed in the past, and a representative example is the one disclosed in Japanese Patent Application Laid-open No. 56-32.
There is one disclosed in No. 078.

Basically, this energy recovery device, as shown in FIG. control valve 3
A bypass 4 that communicates between the front and rear parts of the fluid pipe 1 is connected, and a second control valve 5 and a water turbine 6 disposed on the downstream side of the second control valve 5 are interposed in the bypass 4, respectively, to control the flow fluctuation of the fluid pipe 1. The flow rate is detected by the flow rate detector 2, and the control panel 7i controls both the control valves 3 and 5 accordingly, and the water turbine 6 is driven by the fluid energy of the fluid flowing through the bypass 4, thereby generating the generator 8.
'jf: A book 1 which is operated to recover electrical energy to the power supply bus 9. Therefore, in such a device, the flow of the fluid line 1 is
In order to effectively drive the flow rate detector 2 for detecting fluctuations and the water turbine 6, there is a control system for adjusting the flow rate of the bypass.
Since the valves 3 and 5 are required at a minimum and the control of the control valves 3 and 5 by the control panel 7 is extremely complicated, there is a drawback that the installation is extremely expensive and complicated.

The present invention has been made in view of the above points, and does not require the flow R detector and one control valve as described above, and therefore does not require a complicated control system, and is an inexpensive and simple energy recovery system. Provide a headdress.

The energy recovery device of the present invention that solves this problem makes full use of the fluid pressure on the upstream side of the fluid pipe, and once the fluid on the upstream side of the fluid flow is raised to a predetermined height via the first pipe. The turbine is raised to the desired position, and the water turbine installed in the road is driven once to recover energy using a generator. On the other hand, in response to pressure fluctuations in the fluid pipeline, that is, fluctuations in separation, the water turbine The fluid overflows from the upper end connection part of the first and second pipes to the third pipe and is discharged to the downstream side of the main pipe, so that the number of the second pipe is more than necessary. This is done in two ways so that the flow rate is not supplied.

Next, the example'! il-'Fl 2 diagram will be explained.

Fig. 2 schematically shows the construction equipment recovery equipment according to the present invention. This is used when water is recycled.

12, x3.14 are respectively in the upper direction
and a third conduit, the lower end of the first conduit 12 is connected to the upstream end 11at7) of the wood pipe 11, and the lower ends of the second and third conduits 13 and 14 merge. and is connected to the end of the downstream portion 11b of the woodwind 11.

The upper end portions of the eleventh second and third pipe lines 12, 13, and 14 are connected to the loaf via a connecting water tank 15' open to the atmosphere, and the upper end portion Q of the third pipe line 14 is Ma,
The first and second pipes 12.13 are connected at a slightly higher level than the upper end connection part, and are connected to the water (1"/15). The height position of the upper end connection part of the pipe line 12.13 is set according to the fluid pressure of the upstream part 11a of the main pipe 11, especially when pressure fluctuation is predicted, according to its lower limit pressure. That is, the woodwind 11 (i'), the h downstream part 11a
Regardless of the pressure fluctuations, the water rises in the first conduit 12 from the upstream portion 11a to the connecting water tank 15 at least at the upper end connection portion of the first and second conduit 12.13. It is set up so that it can be reached.

Therefore, the water in the upstream portion 11a of the wood pipe 11 flows from the first pipe Wj12 through the connecting water tank 15 to the second pipe '13, but the water in the upstream portion 11a of the pipe 11 is When the water exceeds a certain level, the water flows into the connected water tank 15.
At the same time, the excess water flows into the second pipe line 13 from the connecting water tank 15 and overflows into the third pipe line 14, and the excess water flows into the second pipe line 13.
At t13, the planned water 444. A barrel of almost constant water is made to flow.

Reference numeral 16 denotes a water wheel (for example, a pump) interposed in the lower end portion of the second pipe line 13, and is interlocked and connected to a generator (for example, an induction motor) 17. This water turbine 16 is connected to the second pipe line 13
The maximum efficiency point is operated at the synchronous speed of the generator 17 under the conditions of the input effective head H secured by and the above planned water volume I'
The ones that can be used are selected.

18 is a gate valve installed in the second pipe line 13 part upstream of the water turbine 16; 19 is the upstream and downstream part 11a of the main pipe 11;
21 is a rotation detector with an output contact that detects all rotational speeds (or rotational speeds) of the water turbine 16 and the generator 17; 22;
There is a power supply bus 1 connected to the generator 17 via a switch 23, and 24 is a control panel that controls the opening and closing of the switch 23 in response to signals from the rotation detector 21. When the synchronous speed of 17 or higher is F, the switch 23
This is to control the opening of the

Next, the energy recovery effect by energy recovery cleavage according to the present invention will be explained with reference to the above embodiment.

Now, when the gate valve 18'f of the second pipe 13 is opened and the gate valve 19 of the bypass 20 is closed, the water in the upstream portion 11a of the wood pipe 11 rises through the first pipe 12. The flow -rLiA flows from the connecting water tank 15 to the second pipes W and 13, and is further returned to the downstream portion 11b of the wood pipe 11.

At this time, the water level of the connected water tank 15 changes to the first
and the second pipe line 12, 130, the end connecting portion and the third pipe line 1
4, but since this fluctuation field is extremely small h, the effective head H is secured to be approximately constant.

Furthermore, when the increase in flow in the upstream portion 11a of the wood pipe 11 is large, water in excess of the amount of water required to effectively drive the water turbine 16 will flow into the second pipe 13; This is because all of the water is overflowed from the north end of the third pipe line 14 and is returned to the downstream portion 11b of the main pipe 11.

The water flowing through the second pipe 13 flows through the upstream portion 11 of the wood pipe 11.
Regardless of the flow rate fluctuation of a, the planned water volume will always be approximately constant even without flow rate adjustment.

Therefore, the water turbine 16 is always driven near the highest point and at a rotation speed that matches the planned speed of the generator 17, and the generator 17 is operated by the rotational drive of the water turbine 16. Thus, power is supplied to the power supply bus 22, 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 woodwind 11, the control valve 1 can be controlled by the flow rate detector and control valve as described at the beginning. Good energy recovery can be achieved without requiring any system.

Furthermore, by setting the installation position of the connecting water tank 15 in accordance with the predetermined lower limit pressure of the upstream portion 11a of the wood pipe 11, water is always supplied from the upstream portion 11a to the first The pipe 12 further flows into the second pipe 13 via the connecting water tank 15, but the fluid 1F in the upstream portion 11a of the wood pipe 11 drops below the lower limit pressure described in 10, and the first pipe 12
When the supply of water to the second pipe line 13 is stopped,
The rotation speed of the water turbine 16 becomes lower than the synchronous speed of the generator 17, and the switch 23 is opened by the control panel 24. This type of regulatory (wealth) system is extremely simple and simple.

In this case, by opening the gate valve 19, the water can be diverted to the bypass 2.
It can flow to the downstream part 1 of the woodwind 11 via the pipe 0.

Further, when the fluid pressure in the upstream portion 11a of the main pipe 11 has not fallen below the lower limit pressure, in order to stop driving the water turbine 16, the partition 'jP18 may be closed. In this way, all the water brought from the first pipe line 12 to the connecting water tank 15 flows out from the third pipe line 14 to the downstream portion 11b of the wood pipe 11.

In this way, the water turbine 16 can be operated or stopped simply by opening and closing the gate valve 18.

Furthermore, when performing maintenance and inspection of the connected water tank 15, etc.,
Fully open the gate valve 19 to drain water from the bypass 20 to the woodwind 1.
It is only necessary to let the downstream part of 1 l1l)-\ flow out.

In the above embodiment, the connected water tank 15 is opened to the atmosphere.
Although the upper ends of the first, second, and third pipes 12, 13, and 14 are connected to each other via the Since it is sufficient that the north end of the channel 14 is open to the atmosphere, it is possible to connect the first to third pipelines 12 to 14 as shown in FIG. 3, for example.

That is, the upper ends of the first and second pipe lines 12.13 are directly connected, and the third pipe line 14 is connected to the upper end of the first pipe line 12.
The upper ends may be connected and an opening 14a to the atmosphere may be provided at the upper end of the third conduit 14. In this case, each pipe 12° 13.14 (i") can also be used as a support pillar for a water tank, etc.

As can be understood from the following description, the energy recovery device of the present invention has a lower end portion that fits into the ball flow of the fluid pipe! an upper end of a first conduit connected to the fluid conduit, and an upper end of each of second and third conduits each having a lower end connected to the downstream side of the fluid conduit;
The fluid pipes are connected to each other at a predetermined height position according to the fluid pressure on the upstream side, and a water turbine interlocked with a generator is interposed at the lower end portion of the second pipe, and further, at least the The upper end of the third conduit is open to the atmosphere to allow perfusion from the upper end connecting portion of the first and second conduits to the third conduit; The water turbine can be operated effectively regardless of pressure fluctuations or flow rate fluctuations on the upstream side of the fluid pipeline, without requiring any flow rate detectors and control valves, and without requiring a complicated control system. The fluid energy can be effectively recovered as electrical energy by driving, and the cost of the device can be reduced and the structure can be simplified.3.

[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. This is a schematic sectional view of the main part. 11 Main pipe (fluid pipeline), lla - downstream part of the main pipe, llb downstream part of the main pipe, 12...
1st pipe line, 13 second pipe line, 14 third pipe line,
16 ・Waterwheel, 17 Generator. Patent applicant: Kubota Tekko Co., Ltd. Representative patent attorney: Takashi Suzue −

Claims (1)

[Claims] an upper end of a first pipe whose lower end is connected to the upstream side of the fluid pipe; and a second pipe whose lower end is connected to the downstream side of the fluid pipe.
and the upper end portions of the third conduit are connected to each other at a predetermined height position corresponding to the fluid pressure on the L flow side of the fluid conduit, and a generator is connected to the lower end portion of the second conduit. A water wheel interlocked with the pipe is interposed, and at least the upper end of the third pipe is made of solid air to allow overflow from the upper end connecting portion of the first and second pipes to the third pipe. An energy recovery device characterized by being open to the side.