Building drainage power generation system

Abstract

The invention discloses a building drainage power generation system which comprises a plurality of cascade power generation units sequentially connected with a drainage pipe in a building from top to bottom. The cascade power generation unit comprises a plurality of water storage tanks communicated with the drainage pipe and hydroelectric generating sets arranged below the water storage tanks respectively. Domestic sewage, domestic wastewater and rainwater in a building are used as renewable energy sources, and more electric power can be generated by fully utilizing the renewable energy sources; wherein the building drainage power generation system and the roof solar power generation integrated mode are constructed, complementary cooperation of various renewable energy sources is achieved, and the resource development level and the energy utilization efficiency are improved; a new method for building renewable energy source application is provided for newly building ultralow-energy-consumption buildings and near-zero-energy-consumption buildings.

Description

Technical Field

[0001] The invention relates to the technical field of building drainage power generation, and in particular to a building drainage power generation system. Background Art

[0002] As global warming accelerates and climate extremes increase, the global average temperature rises year by year. In order to slow down climate warming, China has formulated action plans for carbon peak and carbon neutrality, started the process of orderly moving away from fossil fuels and achieving energy transformation, and strived to build an energy system dominated by renewable energy. As temperatures have repeatedly broken records in recent years, electricity demand has surged. How to ensure energy supply in extremely hot weather has become an urgent problem to be solved. In order to cope with climate warming and energy supply, the Ministry of Housing and Urban-Rural Development has accelerated the promotion of energy conservation and carbon reduction work plans in the construction sector, with the aim of reducing energy consumption and carbon emissions in the construction sector, actively and steadily promoting carbon peak and carbon neutrality, and proposed the construction of ultra-low energy consumption buildings and near-zero energy consumption buildings to enhance the application of renewable energy in buildings. Domestic sewage, domestic wastewater, and rainwater in buildings are renewable energy sources, and they should be fully utilized when designing housing buildings.

[0003] At present, building drainage is not used for hydropower generation, but is directly discharged into the municipal drainage network. Therefore, the present invention proposes a building drainage power generation system to achieve the purpose of power generation through the water level difference in the building. Summary of the invention

[0004] The purpose of the present invention is to provide a building drainage power generation system, which converts the potential energy of water into mechanical energy through Archimedean spiral blades, and then converts the mechanical energy into electrical energy through a generator set.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] The present invention provides a building drainage power generation system, comprising a plurality of cascade power generation units connected to the drainage pipes in the building in sequence from top to bottom;

[0007] The cascade power generation unit comprises a plurality of water storage tanks connected to the drainage pipes and a hydroelectric generator set respectively arranged under the water storage tanks.

[0008] Furthermore, the cascade power generation unit includes a bottom power generation unit connected to the municipal drainage network, and a plurality of segmented power generation units sequentially arranged above the bottom power generation unit; wherein the bottom power generation unit and the plurality of segmented power generation units are sequentially connected from bottom to top; and from top to bottom, the water storage capacity of the water tank increases sequentially.

[0009] Furthermore, the segmented power generation unit includes two water storage tanks connected up and down, a hydroelectric generator set connected to the water storage tank through the siphon drainage pipe, a regulating water storage tank connected to the water outlet of the hydroelectric generator set, and another hydroelectric generator set connected to the water outlet of the regulating water storage tank;

[0010] The two water storage tanks are connected via a vertically arranged pressure-resistant connecting pipe;

[0011] The water storage tank at the top layer is connected to a drainage pipe through a conversion drainage pipe, the top of the water storage tank at the top layer is also connected to the water outlet of the bottom hydroelectric generator set in the upper layer segmented power generation unit through a water inlet pipe, and the upper side wall of the water storage tank at the top layer is also connected to another drainage pipe through an overflow pipe; the top of the water storage tank at the top layer is also connected to a ventilation main pipe through a ventilation branch pipe;

[0012] The bottom of the lowest water storage tank is connected to the drainage pipe through a sewage cleaning pipe;

[0013] The top of the regulating and storing water tank is connected to the ventilation main pipe through a ventilation branch pipe.

[0014] Furthermore, the bottom power generation unit includes a water storage tank and a hydroelectric generator set connected to the water storage tank through the siphon drainage pipe;

[0015] The top of the water storage tank is connected to the water outlet of the bottommost hydroelectric generator set in the upper segmented power generation unit through a water inlet pipe; the top of the water storage tank is also connected to a drainage pipe through a bottom conversion drainage pipe; the top of the water storage tank is also connected to the ventilation main pipe through a ventilation branch pipe;

[0016] The top side wall of the water storage tank is also connected to the municipal drainage network through an overflow pipe; a plurality of floor drains for equipment rooms located on different floors are arranged on one drainage pipe; a plurality of branch pipes for connecting sanitary ware located on different floors are arranged on another drainage pipe;

[0017] The lowermost end of the drainage pipe is connected to the municipal drainage network;

[0018] The water outlet of the hydroelectric generator set is connected to the municipal drainage network.

[0019] Furthermore, the segmented power generation unit includes two water tanks connected up and down, a hydroelectric generator set connected to the water tanks through a water inlet pipe, a regulating water tank connected to the water outlet of the hydroelectric generator set, and another hydroelectric generator set connected to the water outlet end of the regulating water tank; wherein an electric valve is provided on the water inlet pipe connected to the water outlet end of the lower water tank, and wherein a minimum liquid level sensor and a maximum liquid level sensor are provided in the lower water tank.

[0020] Furthermore, the hydroelectric generator set includes a cylinder, an Archimedean spiral blade arranged in the cylinder, and generators arranged at both ends of the cylinder; wherein a water inlet and a water outlet are also opened on the outer side walls of the upper and lower ends of the cylinder, and the water inlet is located above the water outlet;

[0021] The rotating shafts of the Archimedean spiral blades are respectively transmission-connected to the generators.

[0022] Furthermore, the siphon drainage pipe is an inverted U-shaped structure, one end of which is located in the water tank and is provided with a bell-mouth pipe, and the other end of which is connected to a hydroelectric generator set; the diameter of the bell-mouth pipe is small at the top and large at the bottom.

[0023] Furthermore, a photovoltaic power generation component is also arranged on the roof of the building where the building drainage power generation system is installed, and together with each of the hydroelectric generator sets, the generated electric energy is transmitted to the energy storage device in the electric energy storage room.

[0024] Furthermore, a secondary drain pipe connected to the municipal drainage network is also provided at the lower end of the drain pipe; the conversion drain pipe includes a horizontal section of the conversion drain pipe and a bottom conversion drain pipe; when the horizontal section of the conversion drain pipe and the bottom conversion drain pipe are blocked, the secondary drain pipe can replace the horizontal section of the conversion drain pipe and the bottom conversion drain pipe for drainage, wherein the water inlet of the secondary drain pipe is located above the horizontal section of the conversion drain pipe and the bottom conversion drain pipe.

[0025] Compared with the prior art, the beneficial technical effects of the present invention are:

[0026] In the present invention, domestic sewage, domestic wastewater and rainwater in buildings are used as renewable energy sources, and the energy can be fully utilized to generate more electricity; the building drainage power generation system and the roof solar power generation are constructed in an integrated mode to achieve the complementary synergy of multiple renewable energy sources, improve the level of resource development and energy utilization efficiency; and provide a new method for the application of building renewable energy for newly built ultra-low energy consumption buildings and near-zero energy consumption buildings. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention will be further described below in conjunction with the accompanying drawings.

[0028] Figure 1 It is a schematic diagram of the main structure of the building drainage power generation system of the present invention;

[0029] Figure 2 It is a schematic diagram of the installation position of the high-level power generation system of the building drainage power generation system of the present invention;

[0030] Figure 3 It is a schematic diagram of the installation position of the low-level power generation system of the building drainage power generation system of the present invention;

[0031] Figure 4 for Figure 2 Structural connection diagram;

[0032] Figure 5 for Figure 3 Structural connection diagram;

[0033] Figure 6 A schematic diagram of a hydroelectric generator set in a building drainage power generation system of the present invention;

[0034] Figure 7 It is a schematic diagram of the structure of the water storage tank in the building drainage power generation system of the present invention;

[0035] Figure 8 It is a schematic diagram of the connection of the secondary drainage pipe of the building drainage power generation system of the present invention.

[0036] Fig. 9 It is a schematic diagram of the connection of the auxiliary drainage pipes on the bottom floor of the building drainage and power generation system of the present invention.

[0037] Fig.10 This is a schematic diagram of the planar layout of a water storage tank in a high-rise residential building drainage power generation system according to the second embodiment of the present invention;

[0038] Fig.11 This is a schematic diagram of the planar layout of the generator set in the drainage power generation system for a high-rise residential building according to the second embodiment of the present invention;

[0039] Fig.12 This is a schematic diagram of the bottom floor plan layout of a drainage power generation system for a high-rise residential building according to a second embodiment of the present invention;

[0040] Fig.13 It is a schematic diagram of the plan layout of a water storage tank in a drainage power generation system for a high-rise public building according to the second embodiment of the present invention;

[0041] Fig.14 This is a schematic diagram of the planar layout of the generator set in the drainage power generation system for high-rise public buildings in the second embodiment of the present invention;

[0042] Fig.15 This is a schematic diagram of the bottom floor plan layout of a drainage power generation system for a high-rise public building according to a second embodiment of the present invention;

[0043] Fig.16 This is a schematic diagram of the bottom floor plan layout of a drainage power generation system for a multi-story residential building according to Embodiment 3 of the present invention;

[0044] Fig.17 This is a schematic diagram of the bottom floor plan layout of a drainage power generation system for a multi-storey public building according to a third embodiment of the present invention;

[0045] Fig.18 This is a system block diagram of the building drainage power generation system combined with the roof solar power generation system of the present invention.

[0046] Fig.19 This is a system block diagram of an alternative solution of the building drainage power generation system of the present invention.

[0047] Explanation of reference numerals: 100, water storage tank; 101, water outlet pipe; 102, ventilation branch pipe; 103, overflow pipe; 104, sewage cleaning pipe; 105, pressure-resistant connecting pipe; 106, inspection door; 107, fixed bracket; 200, siphon drain pipe; 201, bell-mouth pipe; 300, hydroelectric generator set; 301, cylinder; 302, Archimedean spiral blade; 303, water inlet; 304, outlet Water inlet; 305, generator; 400, regulating and storing water tank; 500, drain pipe; 501, floor drain of equipment room; 502, auxiliary drain pipe; 503, branch pipe for sanitary ware; 600, vent pipe; 700, conversion drain pipe; 701, horizontal section of conversion drain pipe; 702, vertical section of conversion drain pipe; 703, bottom conversion drain pipe; 800, municipal drainage network; 900, floor slab; 901, wall. DETAILED DESCRIPTION

[0048] Embodiment 1

[0049] The present embodiment discloses a building drainage power generation system, comprising a plurality of cascade power generation units sequentially connected to a drainage pipe 500 in a building from top to bottom; the cascade power generation units comprise a plurality of water storage tanks 100 connected to the drainage pipe 500, hydroelectric generator sets 300 respectively installed under the water storage tanks 100, and a siphon drainage pipe 200 for connecting the water storage tanks 100 with the hydroelectric generator sets 300.

[0050] When implementing it, Figure 5 As shown, the cascade power generation unit includes a bottom power generation unit connected to the municipal drainage network 800, and a plurality of segmented power generation units sequentially installed above the bottom power generation unit; wherein the bottom power generation unit and the plurality of segmented power generation units are sequentially connected from bottom to top; and from top to bottom, the water storage capacity of the water tank 100 increases sequentially.

[0051] Among them Figure 2 and Figure 3 As shown, the segmented power generation units and the bottom-level power generation units are arranged on a plurality of floor slabs 900 respectively.

[0052] like Figure 2 , Figure 3 , Figure 4 , Figure 5As shown, the segmented power generation unit includes two water tanks 100 connected up and down, a hydroelectric generator set 300 connected to the water tanks 100 through the siphon drainage pipe 200, a regulating water tank 400 connected to the water outlet of the hydroelectric generator set 300, and another hydroelectric generator set 300 connected to the water outlet end of the regulating water tank 400; wherein the two water tanks 100 are connected through a vertically arranged pressure-resistant connecting pipe 105; the upper water tank 100 is connected to a drainage pipe 500 through a conversion drainage pipe 700, and the top of the upper water tank 100 is connected to the outlet pipe 101 of the bottom hydroelectric generator set 300 in the upper segmented power generation unit, and the upper The upper side wall of the water tank 100 of the first layer is also connected to another drain pipe 500 through an overflow pipe 103; the top of the water tank 100 of the uppermost layer is also connected to a ventilation main pipe 600 through a ventilation branch pipe 102; the bottom of the water tank 100 of the lowermost layer is connected to the drain pipe 500 through a sewage cleaning pipe 104; the top of the regulating water tank 400 is connected to the ventilation main pipe 600 through a ventilation branch pipe 102; the conversion drain pipe 700 includes a horizontal conversion drain pipe section 701 and a vertical conversion drain pipe section 702. The vertical conversion drain pipe section 702 is used to make the entire conversion drain pipe 700 produce a siphon effect. When the siphon effect is produced, the water flow rate in the pipe is very fast, and it has a good self-cleaning effect.

[0053] In this embodiment, Figure 3 and Figure 5 As shown, the bottom power generation unit includes a water tank 100 and a hydroelectric generator set 300 connected to the water tank 100 through the siphon drainage pipe 200; wherein the top of the water tank 100 is connected to the outlet pipe 101 of the bottom hydroelectric generator set 300 in the upper layer of the segmented power generation unit; the top of the water tank 100 is also connected to a drainage pipe 500 through the bottom conversion drainage pipe 703; the top of the water tank 100 is also connected to the ventilation main pipe 600 through the ventilation branch pipe 102; the top side wall of the water tank 100 is also connected to the municipal drainage network 800 through the overflow pipe 103; the lower end of the drainage pipe 500 is connected to the municipal drainage network 800; the water outlet of the hydroelectric generator set 300 is connected to the municipal drainage network 800.

[0054] When implementing it, Figure 6 As shown, the hydroelectric generator set 300 includes a cylinder 301, an Archimedean spiral blade 302 installed in the cylinder 301 through a bearing, and a generator 305 installed at both ends of the cylinder 301; wherein a water inlet 303 and a water outlet 304 are also opened on the outer side walls of the upper and lower ends of the cylinder 301, and the water inlet 303 is located above the water outlet 304; wherein the rotating shafts of the Archimedean spiral blades 302 are respectively connected to the generators 305 in a transmission manner.

[0055] In this embodiment, the Archimedean spiral blades 302 in the hydroelectric generator set 300 can further crush feces, toilet paper, and food residues during rotation, thereby improving the fluidity of the liquid mixture and avoiding clogging of the cylinder 301 and the water outlet pipe 101. Figure 6 As shown, the water inlet 303 and the water outlet 304 are each provided with a bell-mouth structure.

[0056] The bell mouth of the water inlet 303 has the function of reducing the impact of water, protecting the generator cylinder wall and prolonging its service life. The bell mouth of the water outlet 304 has the function of increasing the water absorption area, and collecting feces, toilet paper and food residues at the same time, which can be quickly sucked away by the water outlet pipe 101 after being collected. The diameter of the drain pipe is larger than the diameter of the water inlet pipe. The purpose of such design is to discharge the feces, toilet paper and food residues in the generator cylinder in time, and avoid all of them being concentrated in the cylinder 301 to cause blockage and hinder the rotation of the Archimedes spiral blade 302. The Archimedes spiral blade 302 has the advantages of simple structure, safe and reliable operation, convenient use and maintenance, and not easy to be blocked.

[0057] Working principle: First, domestic sewage, domestic wastewater and rainwater are temporarily collected by the water storage tank 100, and then the water in the water storage tank 100 is pumped out by the inverted U-shaped siphon drain pipe 200 (siphon principle), and the other end of the siphon drain pipe 200 is connected to the hydroelectric generator set 300. The present invention utilizes the water level difference of building drainage in the building, converts the potential energy of water into mechanical energy through the Archimedean spiral blade 302, and then converts the mechanical energy into electrical energy through the generator set 300.

[0058] In this embodiment, Figure 7 As shown, the siphon drainage pipe 200 is an inverted U-shaped structure, one end of which is located in the water storage tank 100 and is installed with a bell-mouth pipe 201, and the other end is connected to the hydroelectric generator set 300; the diameter of the bell-mouth pipe 201 is small at the top and large at the bottom.

[0059] The water tank 100 is made into water tanks 100 of corresponding heights according to different building storey heights. For example, if the building storey height is 3 meters, the height of the water tank 100 is about 2.4 meters. This is conducive to the installation of the water tank 100 and reserves maintenance space. Multiple water tanks 100 are connected by a pressure-resistant connecting pipe 105. When the pressure-resistant connecting pipe 105 passes through the floor slab, a sleeve needs to be added. Domestic sewage, domestic waste water, and rainwater will generate pressure in the water tank 100, so the inner wall of the water tank 100 must be able to withstand this pressure. In order to avoid the water tank 100 from bursting in the later stage, all water tanks 100 are processed as a whole by the factory and reserved interfaces such as water inlet pipe, ventilation pipe, overflow pipe, pressure-resistant connecting pipe, and sewage cleaning pipe. A siphon drain pipe 200 is installed in the water tank 100, and one end of the siphon drain pipe 200 is connected to a bell-mouth pipe 201. An inspection door 106 is installed at the bottom of the water storage tank 100, and a sealing rubber ring is arranged around the inspection door. The inspection door is used for checking and clearing the siphon drain pipe 200, the pressure-resistant connecting pipe 105, and the sewage cleaning pipe 104.

[0060] During specific implementation, the bell mouth of the bell-mouth pipe 201 can increase the water absorption area of ​​the siphon drain pipe 200 when absorbing water, play a role in guiding flow, and avoid the generation of vortices in the process of absorbing water. If there are vortices, air may enter the siphon drain pipe 200, thereby affecting the water absorption efficiency and generating noise.

[0061] like Figure 7 As shown, the function of the siphon drain pipe 200 is to use the suction of the siphon drain pipe 200 to extract the mixture of water, food residues, feces, toilet paper, etc. in the water storage tank 100 from the water storage tank 100, and the extracted water is discharged to the hydroelectric generator set 300. The siphon drain pipe 200 plays a key role in the entire building drainage power generation system. The material of the siphon drain pipe 200 should have the characteristics of corrosion resistance, high temperature resistance, aging resistance, and frost resistance to ensure the service life and performance of the siphon drain pipe 200. In order to ensure the quality, airtightness, durability, and inner wall smoothness of the siphon drain pipe 200, all siphon drain pipes 200 are processed as a whole by the factory.

[0062] like Fig.18 As shown, a photovoltaic power generation component is also provided on the roof of the building where the building drainage power generation system is installed, and together with each of the hydroelectric generator sets 300, the generated electric energy is transmitted to the energy storage device in the power storage room. The building drainage power generation system and the roof solar power generation are constructed in an integrated mode to achieve the complementary synergy of multiple renewable energy sources and improve the level of resource development and energy utilization efficiency.

[0063] like Figure 4 , Figure 5 , Figure 8 , Fig. 9As shown, a secondary drain pipe 502 connected to the municipal drainage network 800 is also provided at the lower end of the drain pipe 500; when the horizontal section 701 of the conversion drain pipe and the bottom conversion drain pipe 703 are blocked, the secondary drain pipe 502 can replace the horizontal section 701 of the conversion drain pipe and the bottom conversion drain pipe 703 to drain water, wherein the water inlet of the secondary drain pipe 502 is located above the horizontal section 701 of the conversion drain pipe and the bottom conversion drain pipe 703.

[0064] Embodiment 2

[0065] On the basis of Example 1, the concept of a water conservancy cascade power station is applied to a high-rise building, and multiple cascade power generation units are arranged along the height direction of the building, that is, the building drainage discharged by the upper cascade hydroelectric generator set 300 will flow into the lower cascade water storage tank 100, and the cycle will be repeated until the building drainage discharged by the hydroelectric generator set 300 of the bottom power generation unit is discharged to the municipal drainage pipe network 800. The purpose of such an arrangement is to reasonably utilize water resources, improve water energy utilization, and increase power generation.

[0066] The arrangement principle of the water tank 100 in a high-rise building is that the first-stage power generation unit is arranged with one water tank 100, and the next-stage power generation unit after the first stage is arranged with two water tanks 100 respectively. The two water tanks 100 are connected by a pressure-resistant connecting pipe 105, and the bottom-level power generation unit system is arranged with one water tank 100. In addition to the first-stage water tank 100, the water storage capacity of the next-stage water tank 100 needs to reserve the drainage capacity of the upper-stage power generation unit, that is, the water storage capacity from the top of the siphon drainage pipe 200 to the bottom of the overflow pipe 103 is ≥ the drainage capacity of the upper-stage power generation unit. The purpose of arranging the water tank 100 in this way is to avoid overflow or backflow of domestic sewage, domestic wastewater, and rainwater in the next-stage water tank 100, causing waste and pollution.

[0067] The arrangement principle of the regulating water storage tank 400 in a high-rise building is that since the diameter of the water inlet of the hydroelectric generator set 300 is smaller than the diameter of the water outlet, a regulating water storage tank 400 needs to be arranged between the upper and lower adjacent generator sets to balance the water inlet and outlet of the hydroelectric generator set 300. The regulating water storage tank 400 has the function of quickly collecting the water discharged by the upper hydroelectric generator set 300 to ensure smooth drainage of the hydroelectric generator set 300. The top of the regulating water storage tank 400 is connected to a vent pipe to allow air to circulate in the regulating water storage tank 400, stabilize the pressure, drain water smoothly in the pipeline, and discharge toxic and harmful gases. The regulating water storage tank 400 has the function of blocking the secondary siphon effect, avoiding the generation of huge water pressure to damage the water inlet pipe of the next generator set and the generator cylinder wall.

[0068] The arrangement principle of the hydroelectric generator set 300 in a high-rise building is that the water tank 100 and the regulating water tank 400 connected to the water inlet 303 of the hydroelectric generator set 300 are arranged one floor apart, ensuring that the siphon drain pipe 200 has sufficient suction to suck out the mixture of feces, toilet paper, food residues, etc. in the water tank 100. The water tank 100 and the regulating water tank 400 connected to the water outlet 304 of the hydroelectric generator set 300 are arranged adjacent to the next floor, which is conducive to timely discharge of the mixture in the cylinder 301 and avoid clogging the cylinder 301 and the water outlet pipe 101.

[0069] The kitchens and bathrooms of high-rise residential buildings are restricted by the plane function and are relatively scattered, which is not conducive to the collection of building domestic drainage. In order to collect building domestic drainage, a horizontal conversion layer of drainage pipes is set at a certain interval of each floor when designing the building. In the conversion layer, the scattered kitchen and bathroom vertical drainage main pipes are connected to the conversion drainage pipe 700 respectively, and the conversion drainage pipe 700 is connected to the water storage tank 100 in the wastewater and sewage equipment room around the core tube. The horizontal section 701 of the conversion drainage pipe is arranged at a certain slope to ensure that the domestic drainage can be smoothly discharged into the water storage tank 100. The kitchen and bathroom conversion drainage pipes should be arranged separately and independently, and the diameter of the conversion drainage pipe 700 and the bottom conversion drainage pipe 703 is larger than the diameter of the drainage pipe 500. The conversion drainage pipe 700 retains a section of vertical drainage pipe in the equipment room, and the vertical section 702 of the conversion drainage pipe is used to make the entire section of the conversion drainage pipe 700 produce a siphon effect. When the siphon effect is produced, the water flow rate in the pipe is very fast, and it has a good self-cleaning effect. The walls of the wastewater and sewage equipment rooms are soundproofed and soundproof doors are used to reduce the noise in the equipment rooms. In the conversion floors, the conversion of drainage pipe networks, sports, fitness, and greening are integrated in design and construction, which can not only achieve the horizontal conversion of the building's living drainage pipe network, but also enrich people's spare time and build a green, low-carbon "good house". For existing high-rise residential buildings, the power generation system is arranged on the first floor after the pipe network transformation.

[0070] The toilets in high-rise public buildings are relatively concentrated. A "toilet sewage power generation equipment room" is arranged around the toilets, and multiple cascade power generation units are installed in the equipment room. For existing high-rise public buildings, multiple cascade power generation units can also be installed after pipe network transformation and adding equipment rooms. An energy storage equipment room is also built in the basement for electricity storage.

[0071] Embodiment 3

[0072] When the embodiment 1 is applied to a multi-storey building, the building drainage power generation system is arranged on the first floor because the multi-storey building has relatively low floors. In a newly built multi-storey residential building, a bottom conversion drainage pipe 703 is arranged in the ceiling of the first floor overhead layer, and the bottom conversion drainage pipe 703 is connected to the water storage tank 100. For an existing multi-storey building, a building drainage power generation system is arranged on the first floor after the pipe network is modified.

[0073] Implementation Four

[0074] Based on Example 1, the segmented power generation unit includes two water tanks 100 connected up and down, a hydroelectric generator set 300 connected to the water tank 100 through a water inlet pipe, a regulating water tank 400 connected to the water outlet of the hydroelectric generator set 300, and another hydroelectric generator set 300 connected to the water outlet end of the regulating water tank 400; an electric valve is installed on the water inlet pipe connected to the drainage end of the lower water tank 100, and a minimum liquid level sensor and a maximum liquid level sensor are installed in the lower water tank 100.

[0075] When in use, when the minimum liquid level sensor detects that the liquid level in the water tank 100 is lower than the set liquid level, a signal is sent to the controller, and the electric valve is adjusted to close; when the maximum liquid level sensor detects that the liquid level in the water tank 100 is higher than the set liquid level, a signal is sent to the controller, and the electric valve is adjusted to open, and water is discharged downward to generate electricity.

[0076] The above embodiments are only descriptions of the preferred methods of the invention, and are not intended to limit the scope of the invention. Without departing from the design spirit of the invention, various modifications and improvements made to the technical solutions of the invention by ordinary technicians in this field should fall within the protection scope of the claims of the invention.

Claims

1. A building drainage power generation system, characterized in that: It comprises a plurality of cascade power generation units which are sequentially connected to the drainage pipe (500) in the building from top to bottom; The cascade power generation unit comprises a plurality of water storage tanks (100) connected to a drainage pipe (500), and hydroelectric generating sets (300) respectively arranged below the water storage tanks (100).

2. The building drainage power generation system according to claim 1, characterized in that: The cascade power generation unit comprises a bottom power generation unit connected to a municipal drainage network (800), and a plurality of segmented power generation units sequentially arranged above the bottom power generation unit; the bottom power generation unit and the plurality of segmented power generation units are sequentially connected from bottom to top; and the water storage capacity of the water storage tank (100) increases sequentially from top to bottom.

3. The building drainage power generation system according to claim 2, characterized in that: The segmented power generation unit comprises two water storage tanks (100) connected up and down, a hydroelectric generator set (300) connected to the water storage tank (100) via a siphon drainage pipe (200), a regulating water storage tank (400) connected to the water outlet of the hydroelectric generator set (300), and another hydroelectric generator set (300) connected to the water outlet of the regulating water storage tank (400); The two water storage tanks (100) are connected via a vertically arranged pressure-resistant connecting pipe (105); The water storage tank (100) at the top layer is connected to a drainage pipe (500) through a conversion drainage pipe (700); the top of the water storage tank (100) is also connected to the water outlet of the bottom hydroelectric generator set (300) in the upper layer segmented power generation unit through a water inlet pipe; the upper side wall of the water storage tank (100) at the top layer is also connected to another drainage pipe (500) through an overflow pipe (103); the top of the water storage tank (100) at the top layer is also connected to a ventilation main pipe (600) through a ventilation branch pipe (102); The bottom of the water storage tank (100) at the lowest level is connected to the drainage pipe (500) via a sewage cleaning pipe (104); The upper portion of the regulating and storing water tank (400) is connected to the main ventilation pipe (600) via a ventilation branch pipe (102).

4. The building drainage power generation system according to claim 3, characterized in that: The bottom power generation unit comprises a water storage tank (100), and a hydroelectric generator set (300) connected to the water storage tank (100) via the siphon drainage pipe (200); The top of the water storage tank (100) is connected to the water outlet of the bottommost hydroelectric generator set (300) in the upper segmented power generation unit through a water inlet pipe; the top of the water storage tank (100) is also connected to a drainage pipe (500) through a bottom conversion drainage pipe (703); the top of the water storage tank (100) is also connected to the ventilation main pipe (600) through a ventilation branch pipe (102); The top side wall of the water storage tank (100) is also connected to the municipal drainage network (800) via an overflow pipe (103); a plurality of floor drains (501) located between equipment on different floors are arranged on the drainage pipe (500); a plurality of branch pipes (503) for connecting sanitary ware located on different floors are arranged on another drainage pipe (500); The lowermost end of the drainage pipe (500) is connected to the municipal drainage network (800); The water outlet of the hydroelectric generator set (300) is connected to the municipal drainage network (800).

5. The building drainage power generation system according to claim 3, characterized in that: The segmented power generation unit comprises two water storage tanks (100) connected in an upper and lower manner, a hydroelectric generator set (300) connected to the water storage tank (100) via a water inlet pipe, a regulating water storage tank (400) connected to the water outlet of the hydroelectric generator set (300), and another hydroelectric generator set (300) connected to the water outlet end of the regulating water storage tank (400); an electric valve is provided on the water inlet pipe connected to the drainage end of the lower water storage tank (100), and a minimum liquid level sensor and a maximum liquid level sensor are provided in the lower water storage tank (100).

6. The building drainage power generation system according to any one of claims 4 or 5, characterized in that: The hydroelectric generator set (300) comprises a cylinder (301), an Archimedean spiral blade (302) arranged in the cylinder (301), and generators (305) arranged at both ends of the cylinder (301); a water inlet (303) and a water outlet (304) are also provided on the outer side walls of the upper and lower ends of the cylinder (301), and the water inlet (303) is located above the water outlet (304); The rotating shafts of the Archimedean spiral blades (302) are respectively connected in transmission with the generators (305).

7. The building drainage power generation system according to claim 6, characterized in that: The siphon drainage pipe (200) is an inverted U-shaped structure, one end of which is located in the water storage tank (100) and is provided with a bell-mouth pipe (201), and the other end of which is connected to the hydroelectric generator set (300); the diameter of the bell-mouth pipe (201) is smaller at the top and larger at the bottom.

8. The building drainage power generation system according to claim 7, characterized in that: A photovoltaic power generation assembly is also provided on the roof of the building where the building drainage power generation system is installed, and together with each of the hydroelectric generator sets (300), the generated electric energy is transmitted to the energy storage device in the electric energy storage room.

9. The building drainage power generation system according to claim 8, characterized in that: A secondary drainage pipe (502) connected to the municipal drainage network (800) is also provided at the lower end of the drainage pipe (500); the conversion drainage pipe (700) includes a horizontal section of the conversion drainage pipe (701) and a bottom conversion drainage pipe (703); when the horizontal section of the conversion drainage pipe (701) and the bottom conversion drainage pipe (703) are blocked, the secondary drainage pipe (502) can replace the horizontal section of the conversion drainage pipe (701) and the bottom conversion drainage pipe (703) to drain water, wherein the water inlet of the secondary drainage pipe (502) is located above the horizontal section of the conversion drainage pipe (701) and the bottom conversion drainage pipe (703).

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