An industrial smoke exhaust power generation system

Abstract

The present invention relates to the technical field of energy recycling and utilization, and specifically to an industrial smoke exhaust power generation system, comprising: a chimney body, the inner side wall of which is provided with an annular mounting groove, in which a motor stator is installed; a motor rotor, rotatably mounted in the mounting groove, the motor rotor being provided on the inner side of the motor stator, and turbine blades being provided on the motor rotor; and a protective cover body, in which the motor stator and the motor rotor are both provided within the protective cover body, and the turbine blades penetrate the protective cover body and extend outside the protective cover body. When the system is operating to generate electricity, the internal space of the chimney body is completely filled with smoke, and no rotating shaft occupies the flow area of the smoke channel, so that the generated smoke can smoothly rise and be discharged in the chimney, ensuring the smoke exhaust efficiency of the system while the motor rotor and the motor stator will not come into contact with the smoke, and also ensuring that no solid matter in the smoke is attached to the motor stator and the motor rotor, so that the industrial smoke exhaust power generation system has a high power generation efficiency while ensuring smoke exhaust efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of energy recovery and utilization, and in particular to an industrial smoke exhaust power generation system. Background Art

[0002] A chimney is a structure that provides ventilation for hot flue gases or smoke from a boiler, furnace, stove, or fireplace. Chimneys are typically vertical, or as close to vertical as possible, to ensure a smooth flow of gases, drawing air into the chimney for combustion, or the chimney effect. Flue gases emitted from the chimneys of thermal power plants, ships, or other equipment contain a significant amount of energy, and venting them directly into the atmosphere would result in significant wasted energy.

[0003] In order to recycle the energy in industrial smoke exhaust chimneys, the prior art utilizes the energy of the smoke inside the chimney by installing a rotating shaft inside the chimney, setting turbine blades on the rotating shaft, and using the rising smoke inside the chimney to drive the turbine blades to rotate the rotating shaft to generate electricity. However, when the system is generating electricity, due to the rotating shaft installed in the chimney, the airflow flows through the channel between the rotating shaft and the inner wall of the chimney, driving the turbine blades to rotate. The rotating shaft of the turbine in the chimney will occupy most of the channel area, resulting in the actual channel area in the chimney becoming smaller, greatly reducing the smoke exhaust capacity of the chimney, and seriously affecting the smoke exhaust efficiency of the industrial smoke exhaust system. In addition, because the smoke passing through the chimney contains solid impurities, the solid impurities accumulate on the rotating shaft and turbine blades, making it difficult for the rotating shaft to rotate, resulting in a significant reduction in the power generation efficiency of the power generation system. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defects of low exhaust efficiency and power generation efficiency of the industrial exhaust turbine power generation system in the prior art, thereby providing an industrial exhaust power generation system.

[0005] In order to solve the above technical problems, the present invention provides an industrial smoke exhaust power generation system, comprising:

[0006] The chimney body has an inner wall provided with an annular mounting groove, in which the motor stator is installed;

[0007] The motor rotor is rotatably mounted in the mounting groove, the motor rotor is arranged on the inner side of the motor stator, and turbine blades are installed on the motor rotor;

[0008] The protective cover body, the motor stator and the motor rotor are all arranged in the protective cover body, and the turbine blades penetrate the protective cover body to extend to the outside of the protective cover body.

[0009] Optionally, it further includes a ventilation pipeline that is connected to the inner cavity of the protective cover body, and an air outlet is provided on the side of the protective cover body facing the inner cavity of the chimney body.

[0010] Optionally, the air outlet is at least provided on the underside of the turbine blade.

[0011] Optionally, a plurality of air outlets are arranged at intervals along the circumferential direction.

[0012] Optionally, a plurality of mounting slots, motor rotors, motor stators and turbine blades are arranged at intervals along the axial direction of the chimney body.

[0013] Optionally, the motor stator is connected to the power grid, and a frequency converter is installed between the motor stator and the power grid.

[0014] Optionally, a flow meter is installed in the chimney body, and the flow meter is electrically connected to the frequency converter.

[0015] Optionally, a motor bearing is installed between the motor stator and the motor rotor.

[0016] Optionally, the motor bearing is a rolling bearing or an electromagnetic bearing.

[0017] Optionally, the outer surface of the turbine blade is covered with a protective layer.

[0018] The technical solution of the present invention has the following advantages:

[0019] 1. The industrial smoke exhaust power generation system provided by the present invention includes: a chimney body, the inner wall of which is provided with an annular mounting groove, in which a motor stator is installed; a motor rotor, rotatably mounted in the mounting groove, the motor rotor is arranged on the inner side of the motor stator, and turbine blades are installed on the motor rotor; a protective cover body, in which the motor stator and the motor rotor are both arranged, and the turbine blades penetrate the protective cover body and extend to the outside of the protective cover body.

[0020] When the industrial smoke exhaust power generation system is operating, smoke rises along the inner cavity of the chimney body. The smoke drives the turbine blades, which in turn rotate the motor rotor relative to the motor stator to generate current and output electrical energy. By rotating the motor rotor in the mounting slot, the turbine blades drive the motor rotor to rotate within the mounting slot, eliminating the shaft structure at the center of the turbine blades. Simultaneously, the motor assembly and motor stator are positioned within the protective cover, preventing the motor rotor and motor stator from being exposed to the smoke. When the system is operating to generate electricity, the internal space of the chimney body can be completely filled with smoke, and no shaft will occupy the flow area of the smoke channel. This allows the generated smoke to rise smoothly in the chimney and be discharged, ensuring the system's smoke exhaust efficiency while preventing the motor rotor and motor stator from coming into contact with the smoke. This also ensures that solid matter in the smoke does not adhere to the motor stator and motor rotor, allowing the industrial smoke exhaust power generation system to achieve high power generation efficiency while ensuring smoke exhaust efficiency.

[0021] 2. The industrial smoke exhaust power generation system provided by the present invention also includes a ventilation pipeline, which is connected to the inner cavity of the protective cover body, and an air outlet is provided on the side of the protective cover body facing the inner cavity of the chimney body. By providing a ventilation pipeline to introduce gas into the protective cover body, the air pressure of the protective cover body is kept greater than the air pressure in the inner cavity of the chimney body during system operation, thereby preventing smoke from entering the interior of the protective cover body from the edge of the protective cover body, ensuring a clean environment inside the protective cover body, and ensuring the power generation efficiency of the motor rotor and the motor stator. The source of the gas in the ventilation pipeline can be clean air blown in by a fan or a compressor, or it can be a clean gas source such as compressed air drawn from a compressed air energy storage system, so that the clean gas fills the protective cover body and maintains a positive pressure inside the protective cover body.

[0022] 3. In the industrial smoke exhaust power generation system provided by the present invention, the air outlet is located at least on the underside of the turbine blades. Driven by the flue gas, the gas discharged from the air outlet impacts the turbine blades obliquely upward, increasing the driving force for the turbine blades' rotation. It also cleans the turbine blades by blowing off solid matter adhering to them, facilitating routine maintenance of the power generation system.

[0023] 4. In the industrial smoke exhaust power generation system provided by the present invention, the outer surface of the turbine blades is covered with a protective layer to prevent corrosive substances or tiny solid particles in the flue gas from damaging the turbine blades, thereby increasing the service life of the turbine blades in a flue gas environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 It is a structural schematic diagram of the industrial smoke exhaust power generation system provided in an embodiment of the present invention.

[0026] Figure 2 This is a schematic structural diagram of the coordinated installation of a motor stator and a motor rotor provided in an embodiment of the present invention.

[0027] Explanation of the accompanying symbols: 1. Turbine blades; 2. Protective layer; 3. Motor stator; 4. Motor bearing; 5. Motor rotor; 6. Protective cover; 7. Flow meter; 8. Frequency converter; 9. Frequency converter; 10. Power grid; 11. Chimney body; 12. Ventilation pipe; 13. Air outlet. DETAILED DESCRIPTION

[0028] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0029] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0031] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0032] Example 1

[0033] like Figure 1 and Figure 2 The figure shows an industrial smoke exhaust power generation system provided by this embodiment, which includes a chimney body 11, a motor rotor 5, a motor stator 3 and a protective cover body 6.

[0034] The chimney body 11 has an annular mounting groove on its inner wall, into which the motor stator 3 is mounted. A flowmeter 7 for measuring flue gas flow is installed within the chimney body 11. The motor rotor 5 is rotatably mounted within the mounting groove and positioned inside the motor stator 3. Turbine blades 1 are mounted on the motor rotor 5. Both the motor stator 3 and the motor rotor 5 are housed within a protective cover 6, with the turbine blades 1 extending through the protective cover 6 and extending outside. To ensure the cleanliness of the interior of the protective cover 6, a ventilation line 12 is connected to the interior of the protective cover 6. The ventilation line 12 extends from the exterior of the chimney body 11 into the protective cover 6, allowing clean air to enter the protective cover 6. An air outlet is provided on the side of the protective cover 6 facing the interior of the chimney body 11. The air outlet 13 is located at least on the underside of the turbine blade 1. In this embodiment, the air outlets are arranged in two rows, one above the other and the other below the turbine blade 1. Multiple air outlets 13 are spaced circumferentially within each row. Since industrial smoke exhaust in factories is intermittent rather than continuous, the power generation process of the industrial smoke exhaust power generation system is also intermittent. In practical applications, the industrial smoke exhaust power generation system is combined with a compressed air energy storage system. When the factory is operating, the flue gas energy is converted into electrical energy through a generator, and then converted into air pressure energy and stored through a compressed air energy storage compressor. It is then released during peak power consumption and used to generate electricity through an expander. This allows for more reasonable storage and utilization of the flue gas heat energy generated by the intermittent operation of the factory. After the industrial smoke exhaust power generation system is coupled with the compressed air energy storage system, the compressed air energy storage system can also be used to provide compressed air, which is then passed into the motor through a ventilation pipe to blow out impurities.

[0035] The motor stator 3 is connected to the power grid 10. To facilitate the integration of electrical energy from the power generation system into the power grid 10, a frequency converter 9 is installed between the motor stator 3 and the power grid 10. A flow meter is installed within the chimney body, electrically connected to the frequency converter. A frequency converter controller is provided between the flow meter and the frequency converter. Motor bearings 4 are installed between the motor stator 3 and the motor rotor 5. Motor bearings 4 are either rolling bearings or electromagnetic bearings. To extend the service life of the turbine blades 1 in flue gas environments, a protective layer 2 is applied to the outer surface of the turbine blades 1.

[0036] The motor stator 3 and motor rotor 5 are mounted in the housing. The motor rotor 5 is annular and integrally connected to the turbine blades 1. The motor stator 3 is connected to the frequency converter 9 via wires, which in turn is connected to the power grid 10 via wires. The flue gas flowmeter 7 is connected to the frequency converter 9 via a frequency converter controller 8. The turbine blades 1 have an anti-corrosion layer applied to their surfaces. When the flue gas flow acts on the turbine blades 1, they rotate the motor rotor 5. The rotating rotor 5 cuts through the magnetic field of the motor stator 3, creating electromagnetic induction and generating electrical energy. This energy is then converted by the frequency converter 9 to meet grid connection requirements and fed into the power grid 10. The frequency converter 8 receives the real-time flue gas flow rate measured by the flue gas flowmeter 7 and uses the frequency converter 9 to adjust the speed of the turbine blades 1 based on this flue gas flow rate.

[0037] The geometry of the turbine blades 1 is designed based on the incoming flow pressure, temperature, rotational speed, and outlet pressure. The rotational speed of the turbine blades 1 is controlled in real time by a frequency converter 9 to ensure optimal turbine efficiency. The cross-sectional profile of the turbine blades 1 can be NACA series, Clark series, or a constant thickness profile. A protective layer 2 is applied to the turbine blades 1 to prevent damage from corrosive substances or fine solid particles in the flue gas. This protective layer 2 can be in the form of an anti-wear coating or a thin sheet. The rim motor rotor 5 is integrally fixed to the top of the turbine blades 1 and rotates with the rotation of the turbine blades 1. The rim motor stator 3 is fixed to a mounting slot within the chimney body 11. The relative motion between the rim motor rotor 5 and the stator 3 generates electrical energy. The generator can be a synchronous or asynchronous motor. The motor bearings 4 support the turbine blades 1, ensuring free rotation along their axis of rotation. Bearing types include rolling bearings and electromagnetic bearings.

[0038] The frequency converter 9 converts the electrical energy generated by the turbine rim generator into industrial frequency power to meet the requirements of the power grid 10. The flowmeter 7 measures the flue gas flow before the turbine and provides control parameters to the frequency converter 8. The flowmeter 7 can be a differential pressure flowmeter 7, a rotor flowmeter 7, a throttling flowmeter 7, a turbine flowmeter 7, a positive displacement flowmeter 7, an electromagnetic flowmeter 7, an ultrasonic flowmeter 7, or other types. The frequency converter 8 calculates the optimal speed of the turbine blades 1 based on the measured flue gas flow rate and applies this speed to the turbine blades 1 through the frequency converter 9, ensuring that the turbine blades 1 always operate at the optimal operating point.

[0039] The industrial smoke exhaust power generation system provided in this embodiment has no intermediate rotating shaft structure, which increases the flow area of airflow within the turbine, improving the flue gas flow area and the turbine's work capacity. It can also adjust operating parameters based on the flue gas flow rate, improving operating efficiency. The motor stator 3 and motor rotor 5 are simultaneously positioned within a protective cover 6, and the air pressure within the protective cover 6 is maintained higher than the flue gas pressure, maintaining a clean working environment for the motor stator 3 and motor rotor 5. When the system is operating and generating electricity, the interior space of the chimney body 11 is completely filled with flue gas, and the rotating shaft does not occupy the flow area of the flue gas passage. This allows the generated flue gas to smoothly rise and be discharged through the chimney, ensuring the system's exhaust efficiency while preventing the motor rotor 5 and motor stator 3 from coming into contact with the flue gas. This also ensures that solid matter in the flue gas does not adhere to the motor stator 3 and motor rotor 5. This ensures that the industrial smoke exhaust power generation system maintains both exhaust efficiency and power generation efficiency. During operation, the system controls the turbine speed based on the flue gas, allowing it to adjust operating parameters at any time according to operating conditions to ensure operation at its highest efficiency point. The turbine blades 1 are provided with a protective layer 2 to prevent damage to the blades by corrosive substances or tiny solid particles in the flue gas.

[0040] As an alternative embodiment, multiple mounting slots, motor rotors 5, motor stators 3, and turbine blades 1 are provided at intervals along the axial direction of the chimney body 11. The number of frequency converters 9 is the same as the number of motor stators 3 to ensure that the power generated by each set of motor rotors 5 and motor stators 3 can be fully utilized.

[0041] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. An industrial smoke exhaust power generation system, characterized in that: include: A chimney body (11) has an inner side wall provided with an annular mounting groove, wherein a motor stator (3) is mounted in the mounting groove; A motor rotor (5) is rotatably mounted in the mounting groove, the motor rotor (5) is disposed inside the motor stator (3), and turbine blades (1) are mounted on the motor rotor (5); A protective cover body (6), the motor stator (3) and the motor rotor (5) are both arranged in the protective cover body (6), the turbine blades (1) penetrate the protective cover body (6) to extend to the outside of the protective cover body (6), the inner cavity of the protective cover body (6) is connected to a ventilation pipe (12), the ventilation pipe (12) extends from the outside of the chimney body (11) to the inside of the protective cover body (6), and is used to pass clean gas into the inside of the protective cover body (6), and the protective cover body (6) is provided with an air outlet on one side facing the inner cavity of the chimney body (11), and the air outlet is at least provided on the lower side of the turbine blade (1); By rotating and installing the motor rotor (5) in the installation groove, the turbine blades (1) drive the motor rotor (5) to rotate in the installation groove, thereby eliminating the rotating shaft structure at the center of the turbine blades.

2. The industrial smoke exhaust power generation system according to claim 1, characterized in that: A plurality of air outlets are arranged at intervals along the circumferential direction.

3. The industrial smoke exhaust power generation system according to claim 1 or 2, characterized in that: A plurality of the mounting grooves, the motor rotor (5), the motor stator (3) and the turbine blades (1) are arranged at intervals along the axial direction of the chimney body (11).

4. The industrial smoke exhaust power generation system according to claim 1 or 2, characterized in that: The motor stator (3) is connected to a power grid (10), and a frequency converter (9) is installed between the motor stator (3) and the power grid (10).

5. The industrial smoke exhaust power generation system according to claim 4, characterized in that: A flow meter is installed in the chimney body, and the flow meter is electrically connected to the frequency converter (9).

6. The industrial smoke exhaust power generation system according to claim 1 or 2, characterized in that: A motor bearing (4) is installed between the motor stator (3) and the motor rotor (5).

7. The industrial smoke exhaust power generation system according to claim 6, characterized in that: The motor bearing (4) is a rolling bearing or an electromagnetic bearing.

8. The industrial smoke exhaust power generation system according to claim 1 or 2, characterized in that: The outer surface of the turbine blade (1) is covered with a protective layer (2).

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