Small multi-input energy-saving power generation device

Abstract

The utility model provides a small multi-input energy-saving power generation device which comprises a permanent magnet generator, at least two gear boxes are arranged on a driving shaft of the permanent magnet generator, and each gear box is connected with an output shaft of at least one turbo expander through a clutch. The multiple turbo expanders are connected in parallel to drive the permanent magnet generator, and input media of the turbo expanders are selected from at least two of compressed air, secondary steam and flue gas; an inlet of each turbo expander is connected with a medium input pipeline, and an outlet of each turbo expander is connected with a medium output pipeline; the medium input pipeline is provided with an electric control valve used for controlling the inlet flow of a medium, a pressure sensor used for detecting the pressure in the medium input pipeline and a flow sensor used for detecting the flow of the medium in the medium input pipeline. The flow sensor and the pressure sensor are located between the electric control valve and an inlet of the turbo expander. The multi-medium synchronous treatment device can realize multi-medium synchronous treatment and is adaptive to high-pressure and low-pressure gas sources.

Description

Technical Field

[0001] This invention belongs to the field of power generation equipment technology, and specifically relates to a small multi-input energy-saving power generation device. Background Technology

[0002] A turbine power generation device that can be used for compressed air energy storage refers to a device in a compressed air energy storage system that is responsible for converting the pressure energy and internal energy of high-pressure air into mechanical energy, and further efficiently converting it into electrical energy.

[0003] Current turbine power generation devices suitable for compressed air energy storage typically use modified gas turbine combustion chambers with turbines, or large multi-stage air turbine expanders. These devices have the following drawbacks:

[0004] 1. They generally exhibit characteristics of large-scale centralization, making it difficult to meet the application needs of small-scale distributed energy storage scenarios;

[0005] 2. It almost exclusively uses compressed air (which may be mixed with fuel for heating), and cannot directly utilize other available secondary steam or flue gas on site as the main or auxiliary power source, thus failing to achieve "local sourcing" and comprehensive utilization of energy. Utility Model Content

[0006] To address the problems mentioned in the background section, this invention provides a small, multi-input energy-saving power generation device that meets the application requirements of small-scale distributed energy storage scenarios and enables the "on-site sourcing" and comprehensive utilization of energy.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a small multi-input energy-saving power generation device, comprising a permanent magnet generator, wherein at least two gearboxes are provided on the drive shaft of the permanent magnet generator, and each gearbox is connected to the output shaft of at least one turboexpander via a clutch; multiple turboexpanders are connected in parallel to drive the permanent magnet generator, wherein the input medium of the turboexpander is selected from at least two of compressed air, secondary steam, and flue gas; each turboexpander has an inlet connected to a medium input pipe and an outlet connected to a medium output pipe, wherein the medium input pipe is provided with an electrically controlled valve for controlling the inflow of the medium, a pressure sensor for detecting the pressure inside the medium input pipe, and a flow sensor for detecting the flow rate of the medium inside the medium input pipe, wherein the flow sensor and the pressure sensor are located between the electrically controlled valve and the inlet of the turboexpander.

[0008] Optionally, the turbine expander is a high-pressure turbine expander or a radial turbine.

[0009] Optionally, the clutch is a magnetic powder clutch, and the response time of the magnetic powder clutch is ≤10ms.

[0010] Optionally, the drive shaft of the permanent magnet generator is provided with a first gearbox and a second gearbox. The first gearbox is connected to the first turbine expander through a first clutch, and the second gearbox is connected to the second turbine expander through a second clutch.

[0011] Optionally, the second gearbox is connected to the third turbine expander via a third clutch.

[0012] Optionally, the input medium of the first turbine expander is compressed air, the input medium of the second turbine expander is secondary steam, and the input medium of the third turbine expander is flue gas.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This invention achieves simultaneous processing of multiple media through the coordinated arrangement of a permanent magnet generator, different turbine expanders, and a clutch. It is adaptable to both high and low pressure gas sources, overcoming the dependence of single-turbine structures on a single pressure level. It boasts advantages such as compact structure, small size, high efficiency, energy saving, and convenient maintenance. It is easy to install and deploy at the user's side or at distributed energy points, eliminating the need for large-scale centralized infrastructure and meeting the application needs of small-scale distributed energy storage scenarios.

[0015] The gearbox is designed to match the rotational speeds of the generator (permanent magnet generator) and the multiple drive ends (multiple turbine expanders). Simultaneously, each turbine expander has an independent media delivery channel. By controlling the opening of the electrically controlled valves, the gas flow rate of the turbine expander can be controlled, achieving a balance between the turbine expander input flow rate, the gearbox speed ratio, and the clutch on / off state. This improves the utilization rate of residual gas pressure, increases the torque of the drive shaft, and ultimately increases the power output of the permanent magnet generator.

[0016] A clutch is installed between the turbine expander and the corresponding gearbox. The clutch has a rapid decoupling function, supports independent control of different media, and can adjust the load on the drive shaft in real time to reduce no-load losses. It can adapt to the frequent start-stop requirements in intermittent gas source scenarios, extend the life of the device, and avoid efficiency degradation or equipment damage. In addition, it also supports independent disassembly and maintenance of a single turbine expander, shortening maintenance time. Attached Figure Description

[0017] The disclosure of this utility model will become more readily understood with reference to the accompanying drawings. It will be readily understood by those skilled in the art that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. Furthermore, similar numbers in the drawings are used to denote similar components, wherein:

[0018] Figure 1 A schematic diagram of the structure of one embodiment of this utility model;

[0019] Figure 2 A schematic diagram of another embodiment of the present invention.

[0020] In the diagram: 1. Permanent magnet generator; 21. First gearbox; 22. First turbine expander; 23. First clutch; 24. First medium input pipe; 25. First medium output pipe; 26. First electrically controlled valve; 27. First pressure sensor; 28. First flow sensor; 31. Second gearbox; 32. Second turbine expander; 33. Second clutch; 34. Second medium input pipe; 35. Second medium output pipe; 36. Second electrically controlled valve; 37. Second pressure sensor; 38. Second flow sensor; 41. Third turbine expander; 42. Third clutch; 43. Third medium input pipe; 44. Third medium output pipe; 45. Third electrically controlled valve; 46. Third pressure sensor; 47. Third flow sensor. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0023] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0024] In the description of this utility model, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the workpiece of this utility model is in use. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0025] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0027] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0028] This disclosure addresses the shortcomings of existing technologies, particularly the limitations of single gas source, unsuitability for small-scale distributed scenarios, and lack of flexible utilization of multiple gas sources such as secondary steam and flue gas. It proposes an innovative solution for a small-scale multi-input energy-saving power generation device.

[0029] Please see Figure 1 and Figure 2This disclosure provides a small multi-input energy-saving power generation device comprising a permanent magnet generator 1. At least two gearboxes are mounted on the drive shaft of the permanent magnet generator 1, each gearbox being connected to the output shaft of at least one turbine expander via a clutch. Multiple turbine expanders are connected in parallel to drive the permanent magnet generator 1. The input medium for each turbine expander is selected from at least two of compressed air, secondary steam, and flue gas. Each turbine expander has an inlet connected to a medium input pipe and an outlet connected to a medium output pipe. The medium input pipe is equipped with an electrically controlled valve for controlling the inflow rate of the medium, a pressure sensor for detecting the pressure inside the medium input pipe, and a flow sensor for detecting the flow rate of the medium inside the medium input pipe. The flow sensor and pressure sensor are located between the electrically controlled valve and the inlet of the turbine expander.

[0030] In one possible implementation, the turbine expander is a high-pressure turbine expander or a radial turbine. The clutch is a magnetic powder clutch with a response time ≤10ms.

[0031] When the device is working, the gas source enters the nozzle of the turbo expander through the medium input pipe, converting pressure energy into kinetic energy and ejecting it at high speed. The high-speed airflow impacts the blades of the impeller inside the turbo expander, driving the impeller to rotate around its shaft. The rotation of the impeller drives the output shaft to rotate, and the low-temperature gas, after expansion and work, is discharged from the medium output pipe. The output shaft of the turbo expander drives the input shaft of the connected gearbox to rotate. The gearbox, through gear meshing, converts the high-speed, low-torque input into a low-speed, high-torque output to meet the operating conditions of the permanent magnet generator 1. The output shaft of the gearbox drives the rotor of the permanent magnet generator 1 to rotate, and the rotor drives the permanent magnet to rotate. The generated magnetic field rotates synchronously, and the stator winding cuts the rotating magnetic field to generate an induced electromotive force. When the stator winding is connected to an external circuit, a current is formed, outputting electrical energy.

[0032] The gearbox matches the rotational speed of the permanent magnet generator 1 with that of the turbine expander. Meanwhile, each turbine expander has an independent medium delivery channel. By controlling the opening of the electrically controlled valve on the medium delivery channel, the gas flow rate entering the turbine expander can be controlled, thereby achieving a balance between the turbine expander input flow rate, the gearbox speed ratio, and the clutch on / off control. This improves the utilization rate of residual gas pressure, increases the torque of the drive shaft, and increases the power generation of the permanent magnet generator 1.

[0033] The clutch features rapid decoupling, allowing real-time adjustment of the load on the drive shaft. For example, if a certain physical quantity of the load is detected to be below a threshold, the corresponding clutch will disengage within 10ms, cutting off the mechanical connection and completely decoupling the inactive turbine expander from the gearbox. This reduces no-load losses, adapts to frequent start-stop requirements in intermittent gas supply scenarios, extends device lifespan, and prevents efficiency degradation or equipment damage. Furthermore, it supports independent disassembly and maintenance of individual turbine expanders without requiring the entire unit to be shut down.

[0034] This invention achieves simultaneous processing of multiple media through the coordinated arrangement of a permanent magnet generator 1, different turbine expanders, and clutches. It is adaptable to both high and low pressure gas sources, overcoming the dependence of single-turbine structures on a single pressure level. It boasts advantages such as compact structure, small size, high operating efficiency, energy saving, and convenient maintenance. It is easy to install and deploy at the user's side or at distributed energy points, eliminating the need for large-scale centralized infrastructure and meeting the application needs of small-scale distributed energy storage scenarios.

[0035] Figure 1 A schematic diagram of a specific embodiment based on the technical concept of this utility model is shown below. Figure 1 The small multi-input energy-saving power generation device includes a permanent magnet generator 1. The drive shaft of the permanent magnet generator 1 is equipped with two gearboxes, namely a first gearbox 21 and a second gearbox 31. The first gearbox 21 is connected to the output shaft of the first turbine expander 22 through a first clutch 23, and the second gearbox 31 is connected to the output shaft of the second turbine expander 32 through a second clutch 33.

[0036] The inlet of the first turbine expander 22 is connected to a first medium input pipe 24, and the outlet is connected to a first medium output pipe 25. The inlet of the second turbine expander 32 is connected to a second medium input pipe 34, and the outlet is connected to a second medium output pipe 35. The first turbine expander 22 is configured to process compressed air, and the second turbine expander 32 is configured to process secondary steam. The first medium input pipe 24 is equipped with a first electrically controlled valve 26, a first pressure sensor 27, and a first flow sensor 28. The first flow sensor 28 and the first pressure sensor 27 are located between the first electrically controlled valve 26 and the inlet of the first turbine expander 22. The first electrically controlled valve 26 is used to control the inlet flow rate of the medium, the first pressure sensor 27 is used to detect the pressure inside the first medium input pipe 24, and the first flow sensor 28 is used to detect the flow rate of the medium inside the first medium input pipe 24. The second medium input pipeline 34 is equipped with a second electrically controlled valve 36, a second pressure sensor 37, and a second flow sensor 38. The second flow sensor 38 and the second pressure sensor 37 are located between the second electrically controlled valve 36 and the inlet of the second turbine expander 32. The second electrically controlled valve 36 is used to control the inlet flow rate of the medium, the second pressure sensor 37 is used to detect the pressure inside the second medium input pipeline 34, and the second flow sensor 38 is used to detect the flow rate of the medium inside the second medium input pipeline 34. By dynamically adjusting the opening of the first electrically controlled valve 26 to match the speed ratio of the first gearbox 21 and the state of the first clutch 23, and by dynamically adjusting the opening of the second electrically controlled valve 36 to match the speed ratio of the second gearbox 31 and the state of the second clutch 33, the rational input of multi-media gases can be achieved.

[0037] With the first clutch 23 mechanically coupling the output shaft of the first turbine expander 22 to the first gearbox 21, and the second clutch 33 mechanically coupling the second turbine expander 32 to the second gearbox 31, the first turbine expander 22 and the second turbine expander 32 can drive the permanent magnet generator 1 in parallel. When the first clutch 23 is disengaged to cut off the mechanical coupling between the first turbine expander 22 and the first gearbox 21, or when the second clutch 33 is disengaged to cut off the mechanical coupling between the second turbine expander 32 and the second gearbox 31, the permanent magnet generator 1 is driven by either the first turbine expander 22 or the second turbine expander 32 alone.

[0038] Figure 2 A schematic diagram of another specific embodiment based on the technical concept of this utility model is shown below. Figure 2The small multi-input energy-saving power generation device includes a permanent magnet generator 1. The drive shaft of the permanent magnet generator 1 is equipped with two gearboxes, namely a first gearbox 21 and a second gearbox 31. The first gearbox 21 is connected to the output shaft of the first turbine expander 22 through a first clutch 23. The second gearbox 31 is connected to the output shaft of the second turbine expander 32 through a second clutch 33 and to the output shaft of the third turbine expander 41 through a third clutch 42.

[0039] The first turbine expander 22 has a first medium input pipe 24 connected to its inlet and a first medium output pipe 25 connected to its outlet. The second turbine expander 32 has a second medium input pipe 34 connected to its inlet and a second medium output pipe 35 connected to its outlet. The third turbine expander 41 has a third medium input pipe 43 connected to its inlet and a third medium output pipe 44 connected to its outlet. The first turbine expander 22 is configured to process compressed air, the second turbine expander 32 is configured to process secondary steam, and the third turbine expander 41 is configured to process flue gas.

[0040] The first medium input pipeline 24 is equipped with a first electrically controlled valve 26 for controlling the inflow of compressed air, a first pressure sensor 27 for detecting the pressure inside the first medium input pipeline 24, and a first flow sensor 28 for detecting the flow rate of compressed air inside the first medium input pipeline 24. The first flow sensor 28 and the first pressure sensor 27 are located between the first electrically controlled valve 26 and the inlet of the first turbine expander 22. The second medium input pipeline 34 is equipped with a second electrically controlled valve 36 for controlling the inflow of secondary steam, a second pressure sensor 37 for detecting the pressure inside the second medium input pipeline 34, and a second flow sensor 38 for detecting the flow rate of secondary steam inside the second medium input pipeline 34. The second flow sensor 38 and the second pressure sensor 37 are located between the second electrically controlled valve 36 and the inlet of the second turbine expander 32. The third medium input pipe 43 is equipped with a third electric control valve 45 for controlling the flow rate of flue gas entering the pipe, a third pressure sensor 46 for detecting the pressure inside the third medium input pipe 43, and a third flow sensor 47 for detecting the flow rate of flue gas inside the third medium input pipe 43. The third flow sensor 47 and the third pressure sensor 46 are located between the third electric control valve 45 and the inlet of the third turbine expander 41.

[0041] By dynamically adjusting the opening of the first electric control valve 26, the output of the first turbine expander 22 is matched with the speed ratio of the first gearbox 21 and the state of the first clutch 23. By dynamically adjusting the opening of the second electric control valve 36, the output of the second turbine expander 32 is matched with the speed ratio of the second gearbox 31 and the state of the second clutch 33. By dynamically adjusting the opening of the third electric control valve 45, the output of the third turbine expander 41 is matched with the speed ratio of the second gearbox 31 and the state of the third clutch 42, thereby achieving the rational input of multi-media gas.

[0042] Applications of this device include, but are not limited to:

[0043] ① Compressed air energy storage and release terminal accessories:

[0044] As the core power generation unit of a small or distributed compressed air energy storage power station, when the stored energy needs to be released, high-pressure air (which may be preheated) is directly input into the inlet of the turbine expander 1 of this device, driving the turbine expander 1 to expand and do work, thereby driving the generator to generate electricity.

[0045] Small compressed air energy storage systems for community-level, park-level, or distributed supplementation of large compressed air energy storage power stations.

[0046] ② Industrial waste heat / pressure recovery:

[0047] Secondary steam utilization in the factory:

[0048] In chemical plants, oil refineries, food factories, paper mills, and other places where there is medium- or low-pressure (usually pressure lower than the economic limit of traditional steam turbines) waste steam (secondary steam), this steam, which may otherwise be directly discharged or inefficiently utilized, can be introduced into the turbine expander 1 of this device to drive the turbine expander 1 to generate electricity, or supplement compressed air energy storage and release energy to generate electricity.

[0049] Flue gas residual pressure / waste heat utilization:

[0050] In scenarios such as steel plants, cement plants, and glass kilns where flue gas has a certain pressure and temperature (but usually the temperature, pressure, and cleanliness are lower than the requirements of gas turbines), the flue gas, after preliminary dust removal and other treatments, can be introduced into this device, and its residual pressure and heat can be used to drive the turbine expander 1 to generate electricity.

[0051] Other process waste gas utilization:

[0052] Treat other process exhaust gases that have available pressure energy.

[0053] ③ Distributed energy systems:

[0054] As part of a distributed energy station, it can flexibly connect to different pressurized gas energy sources available locally (such as waste steam from nearby factories, gas produced by biomass gasification, pressurized biogas from small biogas digesters, or even compressed air sources in specific situations) to generate electricity locally, thereby improving energy efficiency and power supply reliability.

[0055] ④ Portable or emergency power supply:

[0056] In specific scenarios (such as remote areas or disaster relief), this device can provide emergency power by using the high-pressure gas cylinders (compressed air) carried on board or by steam / gas generated on site.

[0057] In summary, the application scenarios for this device are distributed, small-scale energy recovery and power generation, with particular emphasis on the diversity and flexibility of energy sources.

[0058] Note that the above description is merely a preferred embodiment of the present invention and the techniques employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A compact multiple-input energy saving power generation device comprising a permanent magnet generator, characterized by, The permanent magnet generator is equipped with at least two gearboxes on its drive shaft, and each gearbox is connected to the output shaft of at least one turbine expander via a clutch; multiple turbine expanders are connected in parallel to drive the permanent magnet generator, and the input medium of the turbine expander is selected from at least two of compressed air, secondary steam, and flue gas; Each turbo expander has a medium input pipe connected to its inlet and a medium output pipe connected to its outlet. The medium input pipe is equipped with an electrically controlled valve for controlling the flow rate of the medium, a pressure sensor for detecting the pressure inside the medium input pipe, and a flow sensor for detecting the flow rate of the medium inside the medium input pipe. The flow sensor and the pressure sensor are located between the electrically controlled valve and the inlet of the turbo expander.

2. A small multiple-input energy-saving power generation device according to claim 1, characterized by The turbine expander is a high-pressure turbine expander or a radial flow turbine.

3. A small multiple-input energy-saving power generation device according to claim 1, characterized by The clutch is a magnetic powder clutch, and the response time of the magnetic powder clutch is ≤10ms.

4. A small multi-input energy-saving power generation device according to claim 1, characterized in that, The permanent magnet generator is equipped with a first gearbox and a second gearbox on its drive shaft. The first gearbox is connected to the first turbine expander via a first clutch, and the second gearbox is connected to the second turbine expander via a second clutch.

5. A small multiple-input energy-saving power generation device according to claim 4, characterized by The second gearbox is connected to the third turbine expander via a third clutch.

6. A small multiple-input energy-saving power generation device according to claim 5, characterized by The input medium for the first turbine expander is compressed air, the input medium for the second turbine expander is secondary steam, and the input medium for the third turbine expander is flue gas.

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