A tail water power generation device for sewage treatment

Abstract

The utility model discloses a tail water power generation device for sewage treatment relates to sewage treatment technical field, include: sewage treatment pool, water diversion pool, open -and -shut assembly and water turbine unit, the water outlet of sewage treatment pool installs water diversion pool, and the intercommunication of water diversion pool and sewage treatment pool installs open -and -shut assembly of control intercommunication state, and the water outlet of water diversion pool installs water turbine unit. Solveed that the present tail water power generation device has the problem of big demand to the size of external space, and there is the problem of limitedness under the small space environment.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically to a wastewater tailwater power generation device for wastewater treatment. Background Technology

[0002] Tailwater usually refers to the wastewater generated after various production or engineering activities. Tailwater power generation converts the potential energy contained in it into the kinetic energy of the turbine, and then uses the turbine as the prime mover to drive the generator to produce electricity.

[0003] For example, publication number CN216518378U, entitled "A Wastewater Treatment Plant Tailwater Power Generation System and Equipment Power Supply System," includes a sedimentation tank, a tailwater inlet pipe, and a turbine. The sedimentation tank is connected to the inlet of the tailwater inlet pipe. A nozzle is installed at the outlet of the tailwater inlet pipe, facing the turbine runner. Multiple fixing blocks are arranged in a ring on the outer wall of the tailwater inlet pipe. A sleeve is installed at one end of the nozzle, located outside the tailwater inlet pipe, and a snap-fit ​​block is installed on the inner wall of the sleeve, which can snap onto the side of the fixing block away from the nozzle. In this application, when the nozzle is clogged by impurities, the sleeve can be rotated to misalign the snap-fit ​​block with the fixing block, allowing the nozzle to be removed from the tailwater inlet pipe. This facilitates cleaning of impurities inside the nozzle or replacement with a new nozzle, thereby enabling the turbine to better utilize the tailwater for power generation.

[0004] The existing wastewater power generation device has the following problems when in use: 1. The sedimentation tank does not have a height difference, so it can only obtain the required kinetic energy by means of an external pipeline. However, the pipeline structure inevitably requires a large external space, which is a limitation for small spaces. 2. The device also requires an additional nozzle structure, which increases the complexity of operation. Therefore, it does not meet the existing requirements. In response, a wastewater power generation device for sewage treatment is proposed. Utility Model Content

[0005] The purpose of this utility model is to provide a wastewater power generation device for wastewater treatment, so as to solve the problem mentioned in the background art that the existing wastewater power generation devices have large external space requirements and are limited in small space environments.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a wastewater power generation device for wastewater treatment, comprising: a wastewater treatment tank, a water receiving and diversion tank, an opening and closing assembly, and a turbine unit. The wastewater treatment tank has a water receiving and diversion tank installed at its outlet end, and the wastewater treatment tank is higher than the water receiving and diversion tank. An opening and closing assembly for controlling the connection state is installed at the connection between the water receiving and diversion tank and the wastewater treatment tank. The turbine unit is installed at the outlet end of the water receiving and diversion tank. A first guide plate is installed at the outlet end of the wastewater treatment tank. The water receiving and diversion tank includes a U-shaped assembly frame, and a second guide plate for connecting to the first guide plate is installed inside the U-shaped assembly frame. Guide plates are present at both the wastewater treatment tank and the water receiving and diversion tank. Even in outdoor environments with limited space, the two internally installed guide plates can create a height difference, allowing the wastewater power generation device to adapt to different assembly environments.

[0007] Preferably, the tilt angle of the first guide plate is 30-35° and the tilt angle of the second guide plate is 40-45°. By setting the tilt angle, the height difference is increased and the water flow is guided.

[0008] Preferably, a water receiving guide bucket is provided below the second guide plate, and a water outlet is provided on one side of the water receiving guide bucket. The water receiving guide bucket and the water outlet are used to discharge water from inside to the turbine unit.

[0009] Preferably, the opening and closing assembly includes a top plate, on which a hydraulic cylinder is mounted, and a sealing plate is mounted on the telescopic end of the hydraulic cylinder; the hydraulic cylinder is used to drive the sealing plate to move up and down, thereby controlling the opening and closing state of the connection between the sewage treatment tank and the water receiving diversion tank.

[0010] Preferably, the front end of the assembly frame is provided with a limiting groove, and a slider is provided in the limiting groove. The rear end of the sealing plate slides in the limiting groove via the slider. Guide sleeves are installed on both sides of the sealing plate. Two sets of vertical guide rods are symmetrically installed on the lower left and right sides of the top plate, and the guide sleeves are installed on the vertical guide rods. The combination of the limiting groove and the slider, along with the combination of the vertical guide rods and the guide sleeves, can make the lifting and lowering process of the sealing plate smoother and more stable.

[0011] Preferably, the turbine unit includes a turbine impact chamber, one end of which has a water inlet and the other end has a drain outlet; the turbine impact chamber serves to supply water in and out.

[0012] Preferably, a water turbine body is installed inside the water turbine impact chamber, and several blades are arranged in a ring at intervals on the outer wall of the water turbine body. The end of the blade facing the water inlet is provided with an arc-shaped part. The design of the blade with the arc-shaped part can make it easier for the water to impact the blade and drive the water turbine body to rotate.

[0013] Preferably, an inclined guide pipe is provided between the water receiving and diversion pool and the turbine unit; the inclined guide pipe is used to further increase the height difference in a large outdoor space environment.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] (1) In this utility model, the water in the sewage treatment tank is discharged and guided downward to the receiving diversion pool through the tilt angle and height difference of the first guide plate. The second guide plate in the receiving diversion pool further guides the water to the receiving diversion bucket. The water in the receiving diversion bucket enters the turbine unit through the outlet. By impacting the impeller, the kinetic energy and height difference of the discharged tailwater are converted into electrical energy by the turbine unit, thus achieving the effect of tailwater power generation. In the above structure, there are guide plates at both the sewage treatment tank and the receiving diversion pool. Even without an external inclined guide pipe, the height difference can still be generated by the two guide plates built inside when there is no large space outdoors. This allows the tailwater power generation device to adapt to different assembly environments. The overall diversion space is large, and a multi-level stepped structure is used for progressive diversion. Compared with the nozzle type, the kinetic energy loss is smaller and the subsequent power generation is larger.

[0016] (2) In this utility model, by setting the opening and closing components, the opening and closing of the connection between the sewage treatment tank and the water receiving diversion tank can be restricted. Specifically, in the closed state, the hydraulic cylinder presses the sealing plate down to the connection between the two, so that the water stays in the sewage treatment tank. When discharged, the hydraulic cylinder drives the sealing plate up to connect the sewage treatment tank and the water receiving diversion tank, so as to realize the subsequent tailwater discharge operation. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the compact assembly state of this utility model;

[0018] Figure 2 This is a schematic diagram of the opening and closing component structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the water receiving and diversion pool structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the water turbine impact chamber structure of this utility model;

[0021] Figure 5 This is a schematic diagram of the extended assembly state of this utility model;

[0022] Figure 6 This is a schematic diagram illustrating the power generation application scenario of this utility model.

[0023] In the diagram: 1. Sewage treatment tank; 101. First guide plate; 2. Water receiving guide tank; 201. U-shaped assembly frame; 202. Limiting slide; 203. Second guide plate; 204. Water receiving guide bucket; 205. Outlet; 206. Sliding block; 3. Opening and closing assembly; 301. Top plate; 302. Hydraulic cylinder; 303. Vertical guide rod; 304. Guide sleeve; 305. Sealing plate; 4. Turbine unit; 401. 402. Water turbine impact chamber; 403. Water turbine body; 404. Blades; 405. Arc-shaped section; 406. Water inlet; 407. Water outlet; 5. Inclined guide pipe; 10. Power distribution busbar; 11. Surge protector; 12. Incoming line cabinet; 13. Feeder cabinet; 14. Charging and discharging unit; 15. Energy storage module; 16. Filtering unit; 17. Transformer; 18. Current transformer; 19. Voltage transformer; 20. Generator. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0025] Please see Figure 1 , Figure 3 and Figure 5 This utility model provides an embodiment of a wastewater treatment tailwater power generation device, comprising: a wastewater treatment tank 1, a water receiving and diversion tank 2, an opening and closing assembly 3, a turbine unit 4, and an inclined guide pipe 5. The water receiving and diversion tank 2 is installed at the outlet end of the wastewater treatment tank 1, and the height of the wastewater treatment tank 1 is higher than that of the water receiving and diversion tank 2. An opening and closing assembly 3 for controlling the connection state is installed at the connection between the water receiving and diversion tank 2 and the wastewater treatment tank 1. The turbine unit 4 is installed at the outlet end of the water receiving and diversion tank 2. A first guide plate 101 is installed at the outlet of the wastewater treatment tank 1, and the inclination angle of the first guide plate 101 is 30-35°. The water receiving and diversion pool 2 includes a U-shaped assembly frame 201. Inside the U-shaped assembly frame 201, a second diversion plate 203 is installed for connection with the first diversion plate 101. The inclination angle of the second diversion plate 203 is 40-45°. A water receiving and diversion bucket 204 is provided below the second diversion plate 203. A water outlet 205 is provided on one side of the water receiving and diversion bucket 204. The turbine unit 4 includes a turbine impact chamber 401. One end of the turbine impact chamber 401 is provided with a water inlet 405, and the other end of the turbine impact chamber 401 is provided with a drain outlet 406. The turbine body 402 is installed inside the turbine impact chamber 401.

[0026] When the water in the sewage treatment tank 1 is discharged, it is guided downwards to the receiving diversion tank 2 by the tilt angle and height difference of the first guide plate 101. The second guide plate 203 in the receiving diversion tank 2 further guides the water to the receiving diversion bucket 204. The water in the receiving diversion bucket 204 enters the turbine unit 4 through the outlet 205. By impacting the blades 403, the kinetic energy generated when the tailwater is discharged is converted into electrical energy by the turbine unit 4, realizing the effect of tailwater power generation. In the above structure, there are guide plates in both the sewage treatment tank 1 and the receiving diversion tank 2. The setting of the guide plates can effectively improve the height difference, kinetic energy and potential energy in the tailwater power generation process, and improve the reuse effect of tailwater.

[0027] In addition, an inclined guide pipe 5 can be installed between the water receiving diversion pool 2 and the turbine unit 4. The inclined guide pipe 5 can further increase the height difference from the outside, making it suitable for scenarios with a large external space.

[0028] Please see Figure 2 and Figure 3 The opening and closing assembly 3 includes a top plate 301, on which a hydraulic cylinder 302 is mounted. A sealing plate 305 is mounted on the telescopic end of the hydraulic cylinder 302. A limiting groove 202 is provided at the front end of the assembly frame 201. A slider 206 is provided in the limiting groove 202. The rear end of the sealing plate 305 slides in the limiting groove 202 via the slider 206. Guide sleeves 304 are installed on both sides of the sealing plate 305. A vertical guide rod 303 is installed at the front of the U-shaped assembly frame 201. The guide sleeves 304 are installed on the vertical guide rod 303.

[0029] By setting the opening and closing component 3, the opening and closing of the connection between the sewage treatment tank 1 and the water receiving diversion tank 2 can be restricted. Specifically, in the closed state, the hydraulic cylinder 302 presses down the sealing plate 305 to the connection between the two, so that the water remains in the sewage treatment tank 1. When discharged, the hydraulic cylinder 302 drives the sealing plate 305 upward, so that the water in the sewage treatment tank 1 can enter the water receiving diversion tank 2 along the diversion plate. Due to the height difference between the two, and the setting of the diversion plate, the water can fall naturally after the connection is opened. During the lifting and lowering process of the hydraulic cylinder 302, the sealing plate 305 is positioned more stably by setting the guide sleeve 304 and the vertical guide rod 303. In addition, the setting of the limiting groove 202 not only improves the lifting stability, but also further restricts the sliding position.

[0030] Among them, such as Figure 4As shown, the turbine body 402 is connected to the generator rotor (not shown in the figure) via a main shaft. The rotor rotates in the magnetic field, cutting magnetic field lines and generating an induced current. Several blades 403 are arranged in a ring at intervals on the outer wall of the turbine body 402. The end of the blade 403 facing the water inlet 405 is provided with an arc-shaped part 404. The structure and working principle of the turbine unit 4 are existing technologies in the field. The power generation principle of the turbine unit 4 is: the kinetic and potential energy of the water flow is converted into electrical energy through mechanical energy. The water flow enters the turbine impact chamber 401 from a high position and impacts the blades 403 of the turbine body 402 through the impact force, driving the blades 403 to rotate. It is connected to the generator rotor via the main shaft. The rotor rotates in the magnetic field, cutting magnetic field lines and generating an induced current, thus completing the output of electrical energy. The blades 403 are constructed with an arc-shaped part 404 at the water flow entry point, making it easier for the water flow to impact and drive the blades 403 to rotate.

[0031] For example, Figure 6 The following provides an illustrative example of the application scenarios for power generation devices. Combined with... Figure 4 and Figure 6 The turbine unit 4 converts the kinetic / potential energy of the water flow into mechanical energy, which drives the rotor of the generator 20 to rotate. The generator 20 converts the mechanical energy into electrical energy and outputs, for example, 400V three-phase AC power.

[0032] In some implementations, such as Figure 6 As shown, a current transformer 18 is installed at the outlet of generator 20 to collect the three-phase current output from the generator, realizing the conversion of large current to small current. This, combined with the multi-functional power meter W, collects the current signal, ensuring the safety of the measurement circuit and preventing high-voltage, high-current devices from being directly connected to the multi-functional power meter W for metering (such as power and energy). Additionally, a voltage transformer 19 is also installed, connected between the generator and the busbar.

[0033] Continue as Figure 6 As shown, the electrical energy output by the generator 20 is input to the distribution bus 10 through the incoming line cabinet 12. The distribution bus 10 is connected to the feeder cabinet 13 through the circuit breaker QF. The feeder cabinet 13 is connected to the corresponding load. Thus, the power generation device provided in this embodiment can supply power to the load.

[0034] In some implementations, such as Figure 6 As shown, a charging / discharging unit 14 and an energy storage module 15 can also be provided. The distribution bus 10 is connected to the feeder cabinet 13 through a circuit breaker QF, and the feeder cabinet 13 is connected to the energy storage module 15 through the charging / discharging unit 14, thereby enabling the energy storage module 15 to store energy. When the turbine unit 4 is not working, that is, when the power generation device is not generating electricity, the energy storage module 15 can supply power to the distribution bus 10 through the charging / discharging unit 14, thereby enabling the distribution bus 10 to supply power to the load.

[0035] In some implementations, such as Figure 6 As shown, a filter unit 16 branch can also be set, and the distribution bus 10 is connected to the filter unit 16 through a circuit breaker QF. Specifically, by setting the filter unit 16, the distribution bus 10 can be connected to the filter branch to compensate for harmonic currents, improve power quality, and thus reduce the interference of nonlinear loads on the distribution bus 10.

[0036] In some implementations, such as Figure 6 As shown, a transformer branch 17 can also be installed. The distribution bus 10 is connected to the transformer 17 via a circuit breaker QF. The transformer 17 can step down the voltage transmitted on the distribution bus 10, for example, 400V, thereby meeting the low-voltage power demand within the station. For example, if 220V power is required, it can be stepped down by a 400V / 220V transformer to power the distribution box, which in turn powers auxiliary equipment such as the control cabinet, lighting, and cooling pump.

[0037] In some implementations, such as Figure 6 As shown, a surge protector 11 is installed on the distribution bus 10. Specifically, the distribution bus 10 is a critical node in power distribution. Installing the surge protector 11 on the distribution bus 10 can limit and protect against overvoltages entering the entire power distribution system in the first instance, providing a relatively stable voltage environment for subsequent electrical equipment. The surge protector 11 can effectively suppress lightning surges or operational overvoltages introduced from the external power grid, protecting numerous feeder cabinets, transformers, and other equipment connected to the distribution bus.

[0038] In some embodiments, the turbine unit 4 is equipped with a speed governor (not shown in the figure), which can adjust the opening of the blades 403 to control the generator rotor speed, thereby controlling the power generation speed of the turbine unit 4.

[0039] In some implementations, a synchronous detection device may also be set up to detect the voltage, frequency, and phase difference between the generator and the power grid to ensure synchronous grid connection; an automatic voltage regulator may be set up to adjust the excitation current and stabilize the generator output voltage at 400V±5%.

[0040] In some implementations, protective devices may also be provided. For example, the protective devices may include overcurrent protection, reverse power protection, and ground fault protection. Overcurrent protection trips the circuit breaker to prevent short circuit damage to equipment; reverse power protection prevents the grid from feeding back power to the generator (essential for grid connection); and ground fault protection detects the zero-sequence current at the neutral point to prevent electric shock or equipment leakage.

[0041] Therefore, the power generation device provided in this embodiment can realize the following: generator → (signal acquisition by current / voltage transformers) → distribution bus → branch circuit breaker → transformer / load / grid connection circuit monitoring. The generator output realizes power generation control and protection through "circuit breaker + current transformer"; the distribution bus realizes load switching and fault isolation through "circuit breaker"; the filter unit can realize dynamic compensation of reactive power and optimize power quality through "circuit breaker" switching.

[0042] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A wastewater treatment tailwater power generation device, comprising a wastewater treatment tank (1), a water receiving and diversion tank (2), an opening and closing assembly (3), and a turbine unit (4), characterized in that: The sewage treatment tank (1) is equipped with a water receiving guide pool (2) at its outlet end. The sewage treatment tank (1) is higher than the water receiving guide pool (2). The opening and closing component (3) for controlling the connection state is installed at the connection between the water receiving guide pool (2) and the sewage treatment tank (1). The water turbine unit (4) is installed at the outlet end of the water receiving guide pool (2). A first guide plate (101) is installed at the outlet of the sewage treatment tank (1). The water receiving guide pool (2) includes a U-shaped assembly frame (201). A second guide plate (203) for connecting with the first guide plate (101) is installed inside the U-shaped assembly frame (201).

2. The apparatus according to claim 1, wherein: The tilt angle of the first guide plate (101) is 30-35°, and the tilt angle of the second guide plate (203) is 40-45°.

3. The apparatus according to claim 1, wherein: A water-receiving guide bucket (204) is provided below the second guide plate (203), and a water outlet (205) is provided on one side of the water-receiving guide bucket (204).

4. The apparatus according to claim 1, wherein: The opening and closing assembly (3) includes a top plate (301), on which a hydraulic cylinder (302) is mounted, and a sealing plate (305) is mounted on the telescopic end of the hydraulic cylinder (302).

5. A wastewater treatment tailwater power generation device according to claim 4, characterized in that: The front end of the assembly frame (201) is provided with a limiting groove (202), and a slider (206) is provided in the limiting groove (202). The rear end of the sealing plate (305) slides in the limiting groove (202) through the slider (206). Guide sleeves (304) are installed on both sides of the sealing plate (305). Two sets of vertical guide rods (303) are symmetrically installed on the lower left and right sides of the top plate (301), and the guide sleeves (304) are installed on the vertical guide rods (303).

6. The apparatus according to claim 1, wherein: The turbine unit (4) includes a turbine impact chamber (401), one end of which is provided with a water inlet (405), and the other end of which is provided with a drain outlet (406).

7. The apparatus according to claim 6, wherein: The water turbine impact chamber (401) is equipped with a water turbine body (402). The outer wall of the water turbine body (402) is provided with a number of blades (403) arranged in a ring at intervals. The end of the blade (403) facing the water inlet (405) is provided with an arc-shaped part (404).

8. The apparatus according to claim 1, wherein: An inclined guide pipe (5) is provided between the water receiving diversion pool (2) and the water turbine unit (4).

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