Energy recovery system of water supply pipeline

Abstract

The utility model discloses an energy recovery system of a water supply pipeline, which comprises a pipeline generator, the pipeline generator is arranged on a water inlet pipe of a pressure reducing valve, and an output cable of the generator is connected to a control / inverter in an energy storage cabinet; a first output end of the control / inverter is connected with a storage battery pack, a second output end of the control / inverter is connected to one power input end of a dual-power automatic change-over switch in a booster pump control cabinet through an energy storage cabinet output cable, and the other power input end of the dual-power automatic change-over switch is connected with a municipal power cable; and the output end of the dual-power automatic change-over switch is connected with the booster pump unit through a control cabinet output cable. The pressure reducing valve has the advantages that energy lost by the pressure reducing valve is fully utilized, the water energy recovery amount is increased, energy supplementation is provided for secondary water supply, and the electricity consumption of the mains supply is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of pipeline water energy recovery, and specifically relates to a system for recovering, storing, transmitting and utilizing surplus energy in a tap water network. Background Art

[0002] like Figure 1 As shown, the high-rise building has 33 floors, divided into low-low floors (1-8 floors), low-high floors (9-16 floors), high-low floors (17-24 floors) and high-high floors (25-33 floors).

[0003] The water supply main pipe 1 directly supplies water to the low-rise and high-rise users 3 of the building through the building branch pipe 2;

[0004] The water supply main pipe 1 supplies water to the low-to-low-floor users 4 via the building branch pipe 2 and the pressure reducing valve 5;

[0005] The water supply main pipe 1 supplies water to high-rise users 10 through the building branch pipe 2 and the booster pump unit 8;

[0006] The water supply main pipe 1 supplies water to high-low floor users 11 through the building branch pipe 2, the booster pump unit 8, and the pressure reducing valve 5.

[0007] That is, due to the limited water supply pressure of the water supply main 1, water can only be supplied to low-level users; high-level users rely on the booster pump unit 8 for secondary water supply, such as Figure 2 As shown, the secondary water supply power system includes a booster pump control cabinet 7, a single power switch is set in the booster pump control cabinet 7, the input end of the single power switch is connected to the municipal power cable 6, and the output end of the single power switch is connected to the booster pump unit 8 through the control cabinet output cable 9. In the same water supply layer, the lower the floor, the greater the pressure. In order to avoid excessive pressure causing the water supply pipeline to burst, the low-low and high-low pipelines must use a pressure reducing valve 5 to reduce the excessive water pressure. At the same time, the secondary water supply needs to consume electricity to drive the booster pump unit 8. However, a lot of energy is wasted in the process of water pressure reduction.

[0008] Chinese patent document CN 104727382A discloses a tap water network with vertical self-generating function, wherein the body of the hydroelectric generator is arranged in a battery box, and the impeller is arranged in a pipe section and placed at the water outlet; the body includes a housing and a rotor shaft extending out of the housing, and the rotor shaft is vertically inserted into the pipe section and connected to the impeller; the power output terminal of the body of the hydroelectric generator is connected to a battery via a circuit board, and the battery is a storage battery; the circuit board at least includes a charging circuit for charging the battery; and also includes a processing module and a communication module arranged in the battery box. The tap water network is energy-saving and environmentally friendly, convenient and practical, and can convert the water energy in the pipeline into mechanical energy, and then convert the mechanical energy into electrical energy, and the electrical energy is stored in the storage battery to supply electrical equipment for use. This patent is mainly reflected in the structure of the generator itself, and does not consider which position in the pipe network is the appropriate installation position of the generator, how to transmit the electrical energy, and how to use it specifically. It cannot maximize the efficiency of tap water flow energy recovery, resulting in low energy recovery efficiency.

[0009] In order to improve the above-mentioned defects, the utility model adopts existing pipeline generators, cables, energy storage devices, dual power automatic switching switches and other equipment on the market to form an energy-saving and consumption-reducing system for energy recovery, storage and utilization that can be implemented, so as to improve the efficiency of tap water flow energy recovery. Utility Model Content

[0010] In view of the problems existing in the prior art, the technical problem to be solved by the utility model is to provide an energy recovery system for a water supply pipeline, which can improve the efficiency of the entire process of tap water flow energy recovery, storage and utilization, and provide energy supplement for secondary water supply.

[0011] The technical problem to be solved by the utility model is achieved through such a technical solution, which includes a pipeline generator, a control / inverter, a battery pack and a dual-power automatic switching switch. The pipeline generator is installed on the water inlet pipe in front of the pressure reducing valve, and the generator output cable is connected to the control / inverter inside the energy storage cabinet; the first output end of the control / inverter is connected to the battery pack, and the second output end of the control / inverter is connected to one power input end of the dual-power automatic switching switch in the booster pump control cabinet through the energy storage cabinet output cable, and the other power input end of the dual-power automatic switching switch is connected to the municipal power cable, and the output end of the dual-power automatic switching switch is connected to the booster pump unit through the control cabinet output cable.

[0012] Since the pressure reducing valve is the main energy waste point inside the tap water network, installing a pipeline generator in the water inlet pipe before the pressure reducing valve can partially or completely replace the function of the pressure reducing valve with the pipeline generator. This can not only obtain maximum power generation capacity but also will not have any impact on the user's water use. Installing the pipeline generator at other locations will cause two problems for some users: serious drop in water pressure and serious fluctuation in water pressure.

[0013] The utility model has the following advantages: a pipeline generator is added to the water inlet pipe in front of the pressure reducing valve, which can generate electricity and reduce pressure at the same time; the electricity generated by the pipeline generator is first sent to the energy storage cabinet for storage and regulation; when the output cable of the energy storage cabinet has industrial frequency power output, the switch on this side of the dual power automatic switching switch is closed first, and the switch on the municipal power cable side is cut off; the recovered electric energy is used to drive the booster pump unit, thereby reducing the power consumption of municipal electricity and achieving the purpose of saving energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings of the present utility model are as follows:

[0015] Figure 1 The three-dimensional structure diagram of the existing water pipe network;

[0016] Figure 2 Schematic diagram of the electrical system for the existing secondary water supply;

[0017] Figure 3 A three-dimensional structural diagram for installing the water pipe network of the utility model;

[0018] Figure 4 It is a plan view of the power system for secondary water supply of the utility model.

[0019] In the figure, 1. water supply main pipe; 2. building branch pipe; 3. low-high-rise users; 4. low-low-rise users; 5. pressure reducing valve; 6. municipal power cable; 7. booster pump control cabinet; 8. booster pump unit; 9. control cabinet output cable; 10. high-high-rise users; 11. high-low-rise users; 12. pipeline generator; 13. generator output cable; 14. energy storage cabinet; 15. control / inverter; 16. battery pack; 17. energy storage cabinet output cable; 18. dual power automatic switching switch. DETAILED DESCRIPTION

[0020] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0021] like Figure 3 As shown, the utility model includes a pipeline generator 12, a control / inverter 15, a battery pack 16 and a dual power automatic switching switch 18. The pipeline generator 12 is installed on the water inlet pipe before the pressure reducing valve 5, and the generator output cable 13 is connected to the control / inverter 15 inside the energy storage cabinet 14; Figure 4 As shown, the first output end of the control / inverter 15 is connected to the battery pack 16, the second output end of the control / inverter 15 is connected to one power input end of the dual power automatic switching switch 18 in the booster pump control cabinet 7 through the energy storage cabinet output cable 17, the other power input end of the dual power automatic switching switch 18 is connected to the municipal power cable 6, and the output end of the dual power automatic switching switch 18 is connected to the booster pump unit 8 through the control cabinet output cable 9.

[0022] The functions of each component of the utility model are described as follows:

[0023] In order to recover the energy wasted by the pressure reducing valve 5, a pipeline generator 12 is installed on the water inlet pipe before the pressure reducing valve 5. When water flows through, part of the pressure internal energy is converted into electrical energy, so that the pipeline pressure after the pipeline generator 12 is reduced. When the generator works at the maximum working condition (full load), the pipeline generator replaces the pressure reducing valve, and the pressure reducing valve no longer works; when the pipeline generator works at the minimum working condition (zero load), it is equivalent to having no pipeline generator, and the pressure reducing valve is responsible for reducing pressure; when the pipeline generator works at the intermediate working condition, the pipeline generator reduces part of the pressure, and the remaining surplus pressure is reduced by the pressure reducing valve.

[0024] In order to transmit the generated electricity, a generator output cable 13 is provided to send the electricity generated by the pipeline generator 12 to the control / inverter 15 inside the energy storage cabinet 14 (the control / inverter is a commercially available product, and both photovoltaic power generation and wind turbine power generation use the control / inverter, which has multiple functions such as photovoltaic and wind turbine power generation input, battery charging, and inverter output). In order to store the generated electricity, the energy storage cabinet 14 has a control / inverter 15 and a battery pack 16. The control / inverter 15 is connected to the pipeline generator 12 and the booster pump control cabinet 7 externally, and is connected to the battery pack 16 internally. The control / inverter 15 intelligently determines the power generation / storage / consumption situation, and starts and stops the inverter output externally and the charging and discharging control of the battery pack at any time.

[0025] In order to utilize the generated electricity, an energy storage cabinet output cable 17 is provided, and a dual power automatic switching switch 18 is added to the booster pump control cabinet 7, and is set to give priority to closing the energy storage cabinet output cable 17. When the power supply capacity of the pipeline generator and the energy storage cabinet is greater than the power load of the booster pump unit 8, the control / inverter 15 starts to invert and output industrial frequency electric energy, and the electric energy is sent to the booster pump control cabinet 7 through the energy storage cabinet output cable 17. The dual power automatic switching switch 18 gives priority to closing the switch on this side and cutting off the switch on the municipal power cable 6 side, and uses the recovered electric energy to drive the booster pump unit 8; when the power supply capacity of the pipeline generator and the energy storage cabinet is less than the power load of the booster pump unit 8, the control / inverter 15 stops inverting and outputting industrial frequency electric energy, and the dual power automatic switching switch 18 automatically cuts off the switch on this side and closes the switch on the municipal power cable 6 side, and uses the municipal electric energy to drive the booster pump unit 8, thereby reducing the municipal power consumption.

[0026] By using the utility model, the tap water energy that is wasted can be recovered and stored in the form of electrical energy for use by the booster pump unit 8, which can save a lot of energy. The calculation formula for the recovered energy N is: N=rQΔH=9.81×Q(m³ / S)×ΔH(m), where r is the acceleration of gravity, Q is the flow rate per second in the pipeline, and ΔH is the pressure difference between the front and rear ends of the pipeline generator. (Special note: the liquid level difference only exists in a static pressure environment, and is not applicable to the pressure difference between the front and rear ends of the pipeline generator on the pressure pipe network of tap water).

Claims

1. An energy recovery system for a water supply pipeline, comprising a pipeline generator (12), a control / inverter (15), a battery pack (16) and a dual power automatic switching switch (18), characterized in that: The pipeline generator (12) is installed on the water inlet pipe of the pressure reducing valve (5), and the generator output cable (13) is connected to the control / inverter (15) inside the energy storage cabinet (14); the first output end of the control / inverter (15) is connected to the battery pack (16), and the second output end of the control / inverter (15) is connected to one power input end of the dual power automatic switching switch (18) in the booster pump control cabinet (7) through the energy storage cabinet output cable (17); the other power input end of the dual power automatic switching switch (18) is connected to the municipal power cable (6), and the output end of the dual power automatic switching switch (18) is connected to the booster pump unit (8) through the control cabinet output cable (9).

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