Energy recovery device for water supply pipeline of water plant

Abstract

The utility model relates to an energy recovery device for a water supply pipeline of a water plant. The energy recovery device comprises a water-turbine generator set, a flow and pressure regulating valve and a water plant raw water steel pipe, the water-turbine generator set is connected in parallel with the flow and pressure regulating valve; a power generation branch pipe is connected from the upstream of the flow-regulating and pressure-regulating valve and is connected with the water turbine water inlet valve and the water turbine assembly, and a tail water pipe of the water turbine assembly is connected to a tail water tank culvert through a tail water gate valve and is connected to the downstream side of the flow-regulating and pressure-regulating valve through a tail water steel pipe connected with the tail water tank culvert; according to the water plant water conveying pipeline energy recovery device, the surplus water head at the outlet of the water plant raw water conveying pipeline is used for hydroelectric generation, energy recovery is achieved, energy waste is reduced, and the requirements for energy conservation and emission reduction are met; according to the device, a water-turbine generator set is connected with a flow and pressure regulating valve in parallel; a power generation branch pipe of the water-turbine generator set is connected from the upstream of the flow-regulating and pressure-regulating valve; the raw water steel pipe assembly is connected with the water turbine assembly; effective recovery of energy can be achieved, energy waste is reduced, and high practical value is achieved.

Description

Technical Field

[0001] This utility model belongs to the field of energy conservation and emission reduction technology, and specifically relates to an energy recovery device for water supply pipelines in water plants. Background Technology

[0002] Urban water plants typically draw water from reservoirs, rivers, or lakes. When the raw water from the reservoir reaches the water plant through the transmission pipeline, there is usually a drop in elevation between the reservoir intake and the water plant inlet, resulting in excess head energy. Currently, water plants use flow regulating valves or energy dissipation valves to reduce the pressure of the water flow in the transmission pipeline before it enters the pre-ozone distribution tank for water treatment. Although this solves the problem of pressure reduction and energy dissipation in the pipeline, it also wastes water resources and does not meet the requirements of energy conservation and emission reduction.

[0003] Therefore, improvements are needed to address the aforementioned technical issues. Utility Model Content

[0004] The purpose of this utility model is to provide an energy recovery device for water plant pipelines, which aims to utilize the surplus water head at the outlet of the raw water transmission tunnel and pipeline of the water plant for hydropower generation, thereby realizing energy recovery, reducing energy waste, and meeting the requirements of energy conservation and emission reduction.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: an energy recovery device for a water plant water transmission pipeline, comprising a turbine generator set, a flow regulating and pressure regulating valve, and a raw water steel pipe for the water plant; the turbine generator set is connected in parallel with the flow regulating and pressure regulating valve; the generator branch pipe is connected upstream of the flow regulating and pressure regulating valve, connecting the turbine inlet valve and the turbine assembly, and the tailrace pipe of the turbine assembly is connected to the tailrace culvert via the tailrace gate valve, and then connected to the downstream side of the flow regulating and pressure regulating valve via the tailrace steel pipe connected to the tailrace culvert.

[0006] In a preferred embodiment of this utility model, the raw water steel pipe of the water plant includes a main inlet pipe, a downstream valve of the flow regulating valve and a upstream pipe of the flow regulating valve; the flow regulating valve is mounted on the upstream pipe of the flow regulating valve; the upstream pipe of the flow regulating valve is laid parallel to the power plant building, and a valve is mounted on the upstream pipe of the flow regulating valve.

[0007] In a preferred embodiment of this utility model, the main inlet pipe is connected to the power station inlet steel pipe main valve; the power station inlet steel pipe main valve is connected to the turbine assembly through a pipe assembly, and the downstream valve of the flow regulating and pressure regulating valve is connected to the power station tailrace steel pipe valve; then it is connected to the water distribution pre-ozonation pool; the power station tailrace steel pipe valve is connected to the tailrace steel pipe and tailrace box culvert of the turbine assembly.

[0008] In a preferred embodiment of this utility model, the turbine assembly includes a first turbine, a second turbine, and a third turbine; the pipeline assembly includes a first pipeline, a second pipeline, and a third pipeline; wherein, one end of the first pipeline is connected to the main valve of the power station's inlet steel pipe, and the other end of the first pipeline is connected to the third turbine; one end of the second pipeline is connected to the first pipeline, and the other end of the second pipeline is connected to the first turbine; one end of the third pipeline is connected to the second pipeline, and the other end of the third pipeline is connected to the second turbine.

[0009] In a preferred embodiment of this utility model, the first turbine is connected to a first tailrace steel pipe; a first tailrace gate valve is installed on the first tailrace steel pipe; the second turbine is connected to a second tailrace steel pipe; a second tailrace gate valve is installed on the second tailrace steel pipe; the third turbine is connected to a third tailrace steel pipe; a third tailrace gate valve is installed on the third tailrace steel pipe; the first tailrace steel pipe, the second tailrace steel pipe, and the third tailrace steel pipe are connected to a tailrace culvert, and the tailrace culvert is connected to a cooling water recovery tank.

[0010] In a preferred embodiment of this utility model, the bottom of the cooling water recovery tank is connected to two drain pipes, each equipped with a drain pump. The drain pipes are connected to the tailrace pressure steel pipe of the third turbine. The bearing cooling water of the turbine components is connected to the cooling water recovery tank via the drain steel pipes.

[0011] In a preferred embodiment of this utility model, the cooling water recovery tank is equipped with a liquid level sensor, which is connected to the water pump control box to control the start and stop of the drainage pump.

[0012] In a preferred embodiment of this utility model, the pipeline assembly is equipped with a DN50 electric butterfly valve and a fully automatic water filter.

[0013] In a preferred embodiment of this utility model, flow indicator signals are installed on the coolers of the first, second, and third water turbines.

[0014] In a preferred embodiment of this utility model, the hydro-generator unit is connected to the busbar of the water plant's power distribution room to supply the water plant's power load, and any excess power is fed into the power grid.

[0015] The beneficial effects of this utility model are:

[0016] This utility model has a simple structure. By setting up an energy recovery device for a water plant's water transmission pipeline, it utilizes the excess head at the outlet of the raw water transmission pipeline to generate hydroelectric power, thereby achieving energy recovery, reducing energy waste, and meeting the requirements of energy conservation and emission reduction. The device's turbine generator set is connected in parallel with the flow regulating and pressure regulating valve. The power generation branch pipe of the turbine generator set is connected upstream of the flow regulating and pressure regulating valve, and the raw water steel pipe assembly is connected to the turbine assembly. It can achieve effective energy recovery, reduce energy waste, and has high practical value. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of an energy recovery device for a water supply pipeline in a water plant, according to an embodiment of this utility model.

[0018] Figure 2 This is an embodiment of the present utility model. Figure 1 A sectional view;

[0019] Figure 3 This is an embodiment of the present utility model. Figure 1 A sectional view of the first water turbine;

[0020] Figure 4 This is an embodiment of the present utility model. Figure 1 A sectional view of the second water turbine;

[0021] Figure 5 This is an embodiment of the present utility model. Figure 1 A sectional view of the third water turbine;

[0022] Figure 6 This is a schematic diagram of an energy recovery device for a water supply pipeline in a water plant, according to an embodiment of this utility model.

[0023] The attached diagram is labeled as follows: 1. Power plant building; 2. Flow regulating and pressure regulating valve; 3. Main valve of power plant inlet steel pipe; 4. Valve of power plant tailrace steel pipe; 5. Pre-ozonation pool for water distribution; 6. Tailrace culvert; 7. Tailrace steel pipe; 8. Upstream pipe of flow regulating and pressure regulating valve; 10. Downstream valve of flow regulating and pressure regulating valve; 11. Main inlet pipe; 12. First tailrace gate valve; 13. Second tailrace gate valve; 14. Third tailrace gate valve; 15. Turbine assembly; 20. First turbine; 21. Second turbine; 22. Third turbine; 23. First pipe; 30. Second pipe; 31. Third pipe; 32. First tailrace steel pipe; 40. Second tailrace steel pipe; 41. Third tailrace steel pipe; 42. Cooling water recovery tank; 43. Drainage pipe; 44. Drainage pump; 45. Liquid level sensor; 46. Tailrace pressure steel pipe; 47. Hydro-generator unit; 100. Detailed Implementation

[0024] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0025] Example:

[0026] like Figures 1-6As shown, a water plant water transmission pipeline energy recovery device includes a turbine generator set, a flow regulating and pressure regulating valve 2, and a raw water steel pipe for the water plant. Considering the reliability of water supply, the turbine generator set and the flow regulating and pressure regulating valve 2 are connected in parallel. The turbine generator set is located at the entrance of the raw water pipe to the water plant. The generator branch pipe is connected upstream of the flow regulating and pressure regulating valve 2, and connects to the turbine inlet valve and the turbine assembly 20. The tailrace pipe of the turbine assembly 20 is connected to the tailrace culvert 7 via the tailrace gate valve, and then connected to the downstream side of the flow regulating and pressure regulating valve 2 via the tailrace steel pipe 8 connected to the tailrace culvert 7.

[0027] This utility model has a simple structure. By setting up an energy recovery device for a water plant's water transmission pipeline, it utilizes the excess head at the outlet of the raw water transmission pipeline to generate hydroelectric power, thereby achieving energy recovery, reducing energy waste, and meeting the requirements of energy conservation and emission reduction. The device's turbine generator set is connected in parallel with the flow regulating and pressure regulating valve. The power generation branch pipe of the turbine generator set is connected upstream of the flow regulating and pressure regulating valve, and the raw water steel pipe assembly is connected to the turbine assembly. It can achieve effective energy recovery, reduce energy waste, and has high practical value.

[0028] Among them, the turbine generator set 100 is a general term for the turbine and generator. The raw water steel pipe of the water plant includes the main inlet pipe 12, the downstream valve 11 of the flow regulating and pressure regulating valve, and the upstream pipe 10 of the flow regulating and pressure regulating valve. The flow regulating and pressure regulating valve 2 is installed on the upstream pipe 10 of the flow regulating and pressure regulating valve. The upstream pipe 10 of the flow regulating and pressure regulating valve is laid parallel to the power plant building 1, and the valve 3 is installed on the upstream pipe 10 of the flow regulating and pressure regulating valve. The main inlet pipe 12 is connected to the main valve 4 of the power plant inlet steel pipe. The main valve 4 of the power plant inlet steel pipe is connected to the turbine assembly 20 through the pipe assembly. The downstream pipe 11 of the flow regulating and pressure regulating valve is connected to the tailwater steel pipe valve 5 of the power plant. Then it is connected to the water distribution pre-ozonation pool 6. The tailwater steel pipe valve 5 of the power plant is connected to the tailwater pipe of the turbine assembly 20 through the tailwater steel pipe 8 and the tailwater culvert 7.

[0029] The turbine assembly 20 includes a first turbine 21, a second turbine 22, and a third turbine 23; the pipeline assembly includes a first pipeline 30, a second pipeline 31, and a third pipeline 32; wherein, one end of the first pipeline 30 is connected to the main valve 4 of the power station's inlet steel pipe, and the other end of the first pipeline 30 is connected to the third turbine 23; one end of the second pipeline 31 is connected to the first pipeline 30, and the other end of the second pipeline 31 is connected to the first turbine 21; one end of the third pipeline 32 is connected to the second pipeline 31, and the other end of the third pipeline 32 is connected to the second turbine 22.

[0030] The first turbine 21 is connected to the first tailrace pipe 40; a first tailrace gate valve 13 is installed on the first tailrace pipe 40; the second turbine 22 is connected to the second tailrace pipe 41; a second tailrace gate valve 14 is installed on the second tailrace pipe 41; the third turbine 23 is connected to the third tailrace pipe 42; a third tailrace gate valve 15 is installed on the third tailrace pipe 42; the first tailrace pipe 40, the second tailrace pipe 41 and the third tailrace pipe 42 are connected to the tailrace culvert 7, and the tailrace culvert 7 is connected to the cooling water recovery tank 43.

[0031] The bottom of the cooling water recovery tank 43 is connected to two drain pipes 44, and a drain pump 45 is installed on the drain pipes 44. The drain pipes 44 are connected to the tailwater pressure steel pipe 47 of the third turbine 23. The bearing cooling water of the turbine assembly 20 is connected to the cooling water recovery tank through the drain steel pipe.

[0032] The cooling water recovery tank 43 is equipped with a liquid level sensor 46, which is connected to the water pump control box to control the start and stop of the drain pump 45.

[0033] The technical water supply for this power station is mainly used for bearing cooling and main shaft sealing. It adopts a unit gravity-flow water supply method and is equipped with water supply connection pipes. The technical water supply draws water from the pressure steel pipe before the main valve of the unit. The pipeline assembly is equipped with a DN50 electric butterfly valve and a fully automatic water filter. The electric butterfly valve and the fully automatic water filter enable the pipeline assembly to be flushed without disassembly, thus avoiding blockage and filtration of the entire pipeline assembly.

[0034] Flow indicator devices are installed on the coolers of the first turbine 21, the second turbine 22, and the third turbine 23. These flow indicator devices are used to monitor the liquid flow rate in the pipes of the first turbine 21, the second turbine 22, and the third turbine 23. The flow indicator devices are connected in series in the pipelines. When there is a normal flow of liquid in the pipeline, the flow indicator device emits a normal signal. When the liquid flow rate in the pipeline is lower than a certain value, it can automatically issue an alarm signal to protect the safety of the first turbine 21, the second turbine 22, and the third turbine 23. These flow indicator devices are used to monitor water flow.

[0035] The hydro-turbine generator unit is connected to the busbar of the water plant's power distribution room to supply the water plant's electrical load, and any excess electricity is fed into the power grid.

[0036] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention; therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0037] Although this paper makes extensive use of the figure's reference numerals: Power plant 1, flow regulating and pressure regulating valve 2, valve 3, main valve of the power station's intake steel pipe 4, valve of the power station's tailrace steel pipe 5, water distribution pre-ozonation tank 6, tailrace culvert 7, tailrace steel pipe 8, upstream pipe of the flow regulating and pressure regulating valve 10, downstream valve of the flow regulating and pressure regulating valve 11, main intake pipe 12, first tailrace gate valve 13, second tailrace gate valve 14, third tailrace gate valve 15, turbine assembly 20, first turbine 21, second turbine 22, third turbine 23, first pipeline The terms 30, 31, 32, 40, 41, 42, 43, 44, 45, 46, 47, 100, etc. are used, but the possibility of using other terms is not excluded; these terms are used only for the purpose of more conveniently describing and explaining the essence of this utility model; interpreting them as any kind of additional limitation is contrary to the spirit of this utility model.

Claims

1. A water plant water conduit energy recovery device, characterized by: The water turbine generator set, the flow and pressure regulating valve (2) and the water plant raw water steel pipe are connected in parallel; the power generation branch pipe is connected to the water turbine inlet valve and the water turbine assembly (20) from the upstream of the flow and pressure regulating valve (2); the tail water pipe of the water turbine assembly (20) is connected to the tail water box culvert (7) through the tail water gate valve, and then connected to the downstream side of the flow and pressure regulating valve (2) through the tail water steel pipe (8) connected with the tail water box culvert (7).

2. A water plant water conduit energy recovery device according to claim 1, characterized in that: The water plant raw water steel pipe comprises a total inlet pipe (12), a valve (11) on the downstream side of the flow and pressure regulating valve and a pipeline (10) on the upstream side of the flow and pressure regulating valve; the flow and pressure regulating valve (2) is arranged on the pipeline (10) on the upstream side of the flow and pressure regulating valve; the pipeline (10) on the upstream side of the flow and pressure regulating valve is arranged in parallel with the power plant building (1), and the valve (3) is arranged on the pipeline (10) on the upstream side of the flow and pressure regulating valve.

3. A water plant penstock energy recovery device according to claim 2, wherein: The total inlet pipe (12) is connected with a power station inlet steel pipe total valve (4); the power station inlet steel pipe total valve (4) is connected with the water turbine assembly (20) through a pipeline assembly; the valve (11) on the downstream side of the flow and pressure regulating valve is connected with a power station tail water steel pipe valve (5); then connected to a water distribution pre-ozone pool (6); the power station tail water steel pipe valve (5) is connected with the tail water pipe of the water turbine assembly (20) through the tail water steel pipe (8) and the tail water box culvert (7).

4. A water plant penstock energy recovery device according to claim 3, wherein: The water turbine assembly (20) comprises a first water turbine (21), a second water turbine (22) and a third water turbine (23); the pipeline assembly comprises a first pipeline (30), a second pipeline (31) and a third pipeline (32); one end of the first pipeline (30) is connected with the power station inlet steel pipe total valve (4), and the other end of the first pipeline (30) is connected with the third water turbine (23); one end of the second pipeline (31) is connected with the first pipeline (30), and the other end of the second pipeline (31) is connected with the first water turbine (21); one end of the third pipeline (32) is connected with the second pipeline (31), and the other end of the third pipeline (32) is connected with the second water turbine (22).

5. A water plant penstock energy recovery device according to claim 4, wherein: The first water turbine (21) is connected with a first tail water steel pipe (40); the first tail water steel pipe (40) is provided with a first tail water gate valve (13); the second water turbine (22) is connected with a second tail water steel pipe (41); the second tail water steel pipe (41) is provided with a second tail water gate valve (14); the third water turbine (23) is connected with a third tail water steel pipe (42); the third tail water steel pipe (42) is provided with a third tail water gate valve (15); the first tail water steel pipe (40), the second tail water steel pipe (41) and the third tail water steel pipe (42) are connected with the tail water box culvert (7), and the tail water box culvert (7) is connected with a cooling water recovery tank (43).

6. A water plant penstock energy recovery device according to claim 5, wherein: The cooling water recovery tank (43) is connected with two drain pipes (44) at the bottom, the drain pipes (44) are provided with drain pumps (45), and the drain pipes (44) are communicated with the tail water pressure steel pipe (47) of the third water turbine (23); the bearing cooling water of the water turbine assembly (20) is connected to the cooling water recovery tank through the drain steel pipe.

7. A water plant water conduit energy recovery device according to claim 6, characterised in that: The cooling water recovery tank (43) is provided with a liquid level sensor (46) connected with the water pump control box to control the start and stop of the water pump (45).

8. A water plant penstock energy recovery device according to claim 4, wherein: The pipeline assembly is provided with a DN50 electric butterfly valve and a full-automatic water filter.

9. A water plant penstock energy recovery device according to claim 4, wherein: Flow indicators are installed on the coolers of the first water turbine (21), the second water turbine (22) and the third water turbine (23).

10. A water plant water conduit energy recovery device according to claim 1, characterized in that: The hydro-generator unit is connected to the power distribution room bus of the water plant for use of the water plant power load, and the excess power is merged into the power grid.

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