Efficient residual pressure power generation system
By installing a residual pressure generator set on the water supply pipeline and optimizing the sealing design, the problems of low efficiency and equipment failure in the existing residual pressure power generation technology have been solved, realizing efficient and reliable utilization of residual pressure and production continuity, and reducing operation and maintenance costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-01-23
- Publication Date
- 2026-03-27
AI Technical Summary
Existing waste pressure power generation technology suffers from low efficiency, high equipment failure rate, high operation and maintenance costs, and affects production continuity in industrial and domestic water systems, mainly due to large hydraulic losses, seal failure, bearing overload, and severe cavitation.
The residual pressure generator set is installed on the water supply pipeline, with the water flow direction opposite to the gravity direction of the turbine. Combined with the sealing design and detachable blades, it is adaptable to different working conditions. The integrated pipeline structure avoids the need for additional access pipelines and hydraulic losses, thereby improving equipment reliability and adaptability to working conditions.
It achieves an increase of over 10% in residual pressure utilization, eliminates or minimizes the need for maintenance for the equipment's lifetime, ensures system safety and production continuity, and reduces maintenance costs and equipment failure risks.
Smart Images
Figure CN121738802A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of residual pressure energy recovery and energy saving technology in water systems, specifically to a high-efficiency water system residual pressure power generation system. Background Technology
[0002] In various industrial and civil water systems, including cooling water circulation systems, water supply systems, and water diversion systems, there exists a certain amount of residual pressure. For example, in cooling water circulation systems, due to the high height of heat exchangers, the circulating return water flowing into the cooling tower typically carries a residual pressure of 10-15 meters or even higher. With the advancement of national energy conservation and emission reduction policies, circulating water return water residual pressure power generation technology has become a key direction for energy conservation. However, existing technologies suffer from the following core problems, hindering their large-scale promotion: Extremely low efficiency of residual pressure utilization: Existing technologies are generally applied to mixed-flow or shaft-extended axial-flow generator sets in hydropower stations. Their connection pipelines require a large number of bends, tees and elbows. Hydraulic losses account for more than 10% of the total residual pressure, directly leading to serious waste of residual pressure energy.
[0003] The equipment has a high failure rate and short lifespan; the turbine main shaft seal is prone to failure, and seal damage can lead to water ingress and bearing damage; the water flow exerts a large water thrust on the runner, causing bearing overload and significantly shortening its lifespan; when operating outside of the design conditions, the runner experiences severe cavitation, which in turn causes equipment vibration and further exacerbates the damage to the seals and bearings.
[0004] High maintenance costs and impact on production: The aforementioned faults result in maintenance costs for the high-efficiency residual pressure system that even exceed the benefits of energy saving; at the same time, equipment damage may interrupt the operation of the circulating water system, directly affecting the continuity of industrial production. Summary of the Invention
[0005] In view of the shortcomings of existing technologies, the present invention provides a high-efficiency waste pressure power generation system.
[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: A high-efficiency waste pressure power generation system includes a water supply pipeline, a bypass pipeline or a second water supply pipeline, wherein a waste pressure generator set is installed on the water supply pipeline, the waste pressure generator set includes a water turbine and a generator, the water flow direction of the water supply pipeline is perpendicular to the rotation direction of the water turbine, and the water flow direction is opposite to the gravity direction of the water turbine.
[0007] According to a preferred embodiment of the present invention, the water turbine includes an inlet channel, an outlet channel, a runner, and an outlet pipe, and the generator is disposed inside the outlet pipe.
[0008] According to a preferred embodiment of the present invention, the generator main shaft is directly connected to the rotor.
[0009] According to one preferred embodiment of the present application, the blades of the runner are detachably connected to the runner.
[0010] According to one preferred embodiment of the present application, the water inlet channel is detachably fixed to the front end of the runner.
[0011] According to one preferred embodiment of the present application, the upper end of the generator is provided with a flywheel. According to one preferred embodiment of the present application, the generator is sealingly connected to the water outlet channel inner shell, and a gap seal is provided between the runner and the water outlet channel inner shell; a cavity is formed between the water outlet channel inner shell and the generator, and a drain pipe is arranged in the cavity to drain water leakage of the gap seal through the water outlet channel outer shell.
[0012] Compared with the prior art, the present application has the following beneficial effects: 1. Maximum utilization efficiency of residual pressure: The residual pressure generator set is arranged on the upper water pipeline, and the integral pipeline structure does not need to add a connecting pipeline, so that the water power loss is close to 0, and the residual pressure utilization rate is improved by more than 10% compared with the prior art; 2. The water flow direction provides upward thrust to offset the gravity of the water turbine, so that the load of the bearing is greatly reduced when the water turbine rotates, and the reliability of the equipment is greatly improved: combined with the sealing design, the core faults of the existing equipment, such as "seal failure, short bearing life and runner cavitation", are completely solved, and "lifelong maintenance-free" or extremely low operation and maintenance requirements are realized; 3. Strong working condition adaptability: the blades, runner or flow channel can be replaced to adapt to different residual pressure and flow conditions, so that the unit can always operate efficiently, and there is no risk of vibration and cavitation; 4. High system safety: the bypass pipeline or parallel pipeline design can be matched, the circulating water system can run without interruption during maintenance, and the production is not affected.
[0013] Some of the additional features of the present application can be described in the following description. Some of the additional features of the present application are obvious to those skilled in the art through examination of the following description and corresponding drawings or through production or operation of the embodiments. The disclosed features of the present application can be realized and achieved through the practice or use of various methods, means and combinations of the specific embodiments described below. BRIEF DESCRIPTION OF DRAWINGS
[0014] The drawings described herein are used to provide further understanding of the present application, and form a part of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application, and do not constitute a limitation on the present application. In the drawings, the same reference numerals represent the same components. Among them, Figure 1 is a structural schematic diagram of embodiment 1 of the present application; Figure 2is a structural schematic diagram of embodiment 2 of the present application; Figure 3 is a structural schematic diagram of the high-efficiency residual pressure in the present application; List of reference signs: 1 - generator, 2 - water outlet pipe, 5 - water outlet channel, 6 - runner, 7 - blade, 13 - main shaft, 14 - water channel outer shell, 15 - water channel inner shell, 16 - water inlet channel, 17 - cavity, 18 - drain pipe, 19 - gap seal, 20 - water inlet channel, 25 - upper water pipeline, 27 - bypass pipeline. DETAILED DESCRIPTION
[0015] In order for those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the scope of protection of the present application.
[0016] The present application will be described in detail below by referring to the accompanying drawings and in combination with the embodiments. EMBODIMENT
[0017] An efficient residual pressure power generation system, comprising an upper water pipeline 25 and a bypass pipeline 27, the upper water pipeline 25 is provided with a residual pressure generator set, the residual pressure generator set comprises a water turbine and a generator 1, the water inlet direction and the water outlet direction of the residual pressure generator set are consistent with the water flow direction of the upper water pipeline 25. The water flow direction and the gravity direction of the water turbine are opposite directions.
[0018] The present application mainly sets the residual pressure generator set on the upper water pipeline 25, uses the water flow residual pressure in the upper water pipeline 25 to drive the residual pressure generator set to rotate, so as to complete the energy recovery process of power generation. When driving the residual pressure generator set to rotate, in order to reduce the loss of residual pressure, the residual pressure generator set is arranged in the upper water pipeline, which avoids the water loss caused by being arranged on the bypass pipeline 27. At the same time, the water flow direction and the gravity direction of the water turbine are opposite directions, so that the load of the bearing is greatly reduced when the water turbine rotates, which can greatly prolong the service life of the bearing. The above structure can realize that the water loss of residual pressure is close to 0, the residual pressure utilization rate is improved by more than 10% compared with the prior art, and the water turbine is "maintenance-free for life" or has very low operation and maintenance requirements. When the system is normally operated, the bypass pipeline is closed and the upper tower pipeline is opened; when the residual pressure generator set is repaired or fails, the bypass pipeline is opened and the upper tower pipeline is closed.
[0019] Embodiment 2: A high-efficiency circulating water pressure surplus power generation system, comprising an upper water pipeline 25, a second upper water pipeline, a pressure surplus power generation unit arranged on the upper water pipeline 25, the pressure surplus power generation unit comprising a water turbine and a generator 1, and the water inlet direction and water outlet direction of the pressure surplus power generation unit being consistent with the water flow direction of the upper water pipeline (25). The water flow direction is opposite to the gravity direction of the water turbine.
[0020] When the system itself has two or more upper water pipelines, a bypass pipeline is not required, and a pressure surplus power generation unit is arranged on one of the upper water pipelines, and the other upper water pipeline is closed and only used as a temporary passage during maintenance. The working principle and effect of the pressure surplus high-efficiency are the same as those of embodiment 1. Embodiment
[0021] The water turbine comprises a water inlet flow channel 20, a water outlet flow channel 5, a runner 6, and a water outlet pipe 2, and the generator 1 is arranged inside the water outlet pipe 2.
[0022] The generator is arranged inside the water outlet pipe, the generator itself is waterproof, the high temperature of the generator can be taken away through the water outlet pipe, the entire device is not too bulky, the structure is reduced, and more pipeline requirements can be met. Embodiment
[0023] On the basis of embodiment 3, the main shaft 13 of the generator 1 is directly connected with the runner 6.
[0024] Direct connection can greatly improve the energy conversion efficiency and improve the stability of the unit. Embodiment
[0025] On the basis of embodiment 3, the blades 7 of the runner 6 are detachably connected to the runner 6.
[0026] By adjusting the blades, different pressure surpluses and flow conditions can be adapted to ensure that the unit always operates efficiently and reduces vibration and cavitation risk. Embodiment
[0027] On the basis of embodiment 3, the water inlet flow channel 16 is detachably fixed to the front end of the runner 6.
[0028] Both the blades and the size of the water inlet flow channel can be adjusted to adapt to different pressure surpluses and flow conditions. Embodiment
[0029] The upper end of the generator 1 is provided with a flywheel.
[0030] The flywheel arranged at the upper end of the motor increases the rotational inertia of the unit and increases the stability, and can further offset the impact force of the water flow on the runner, thereby further improving the service life of the bearing. Embodiment
[0031] The generator 1 is sealingly connected to the outlet water channel inner shell 15, and a gap seal 19 is arranged between the runner 6 and the outlet water channel inner shell 15; the outlet water channel inner shell 15 and the generator 1 form a cavity 17 therebetween, and a drain pipe 18 is arranged in the cavity 17, which penetrates the outlet water channel outer shell 14 to drain the water leakage of the gap seal 19.
[0032] In order to further improve the stable operation of the whole system, reduce the failure and maintenance, the sealing property of the overpressure generator set is optimized. The gap seal is arranged between the runner 6 and the outlet water channel inner shell 15, and the reverse helix prevents the water from flowing out intermittently at the speed of the gap seal during the rotation of the runner, so that only a small amount of water enters the cavity and is then drained through the drain pipe. The generator 1 itself improves the waterproof level to avoid the moisture from entering the inside of the generator 1. The continuous operation of the generator 1 can be effectively ensured.
[0033] It should be noted that all the features disclosed in the specification, or the steps in all the disclosed methods or processes, can be combined in any manner, except for the mutually exclusive features and / or steps.
[0034] In addition, the above specific embodiments are exemplary, and those skilled in the art can think of various solutions under the inspiration of the disclosure of the present application, and these solutions also belong to the disclosed range of the present application and fall within the protection scope of the present application. Those skilled in the art should understand that the specification and drawings of the present application are illustrative and do not constitute a limitation on the claims. The protection scope of the present application is defined by the claims and their equivalents.
Claims
1. A high efficiency overvoltage power generation system characterized by: The application relates to a residual pressure generator set, which comprises an upper water pipeline (25), a bypass pipeline (27) or a second upper water pipeline, a residual pressure generator set is arranged on the upper water pipeline (25), the residual pressure generator set comprises a water turbine and a generator (1), the water inlet direction and the water outlet direction of the residual pressure generator set are consistent with the water flow direction of the upper water pipeline (25), and the water flow direction is opposite to the gravity direction of the water turbine.
2. The high efficiency overvoltage power generation system of claim 1, wherein: The water turbine comprises a water inlet flow channel (20), a water outlet flow channel (5), a runner (6) and a water outlet pipe (2), and the generator (1) is arranged in the water outlet pipe (2).
3. The high efficiency overvoltage power generation system of claim 2, wherein: The main shaft (13) of the generator (1) is directly connected with the runner (6).
4. The high efficiency excess pressure electricity generating system of claim 2, wherein: The blades (7) of the runner (6) are detachably connected with the runner (6).
5. The high efficiency overvoltage power generation system of claim 2, wherein: The water inlet flow channel (16) is detachably fixed to the front end of the runner (6).
6. The high efficiency overvoltage power generation system of claim 1 or 2, wherein: The upper end of the generator (1) is provided with a flywheel.
7. The high efficiency overvoltage power generation system of claim 2, wherein: The generator (1) is sealingly connected with the water outlet flow channel inner shell (15), a gap seal (19) is arranged between the runner (6) and the water outlet flow channel inner shell (15), a cavity (17) is formed between the water outlet flow channel inner shell (15) and the generator (1), a drain pipe (18) is arranged in the cavity (17), and the drain pipe (18) penetrates through the water outlet flow channel outer shell (14) to drain the water leakage of the gap seal (19).