Power generation device using excess pressure of fermenter and excess pressure power generation system

Abstract

The application provides a fermentation tank residual pressure power generation device and a residual pressure power generation system, and relates to the technical field of fermentation residual pressure power generation. The fermentation tank residual pressure power generation device comprises a supporting base, a permanent magnet direct drive generator and a single-pole high-speed turbine expander; the permanent magnet direct drive generator and the single-pole high-speed turbine expander are arranged on the supporting base; and the output shaft of the single-pole high-speed turbine expander is in transmission connection with the permanent magnet direct drive generator. The residual pressure power generation system comprises a plurality of gas storage tanks and the fermentation tank residual pressure power generation device; and each gas storage tank is individually connected with the fermentation tank residual pressure power generation device. The technical effect of improving power generation efficiency is achieved.

Description

Technical Field

[0001] This invention relates to the field of fermentation residual pressure power generation technology, and more specifically, to power generation equipment and systems for residual pressure in fermenters. Background Technology

[0002] Under the general trend of industrial production transforming towards green, low-carbon, energy-saving, and efficient practices, the bio-fermentation industry, as a high-energy-consuming industry, has made the recycling and utilization of various waste energy sources during the production process an important direction for technological upgrading. During operation, bio-fermentation tanks continuously generate exhaust gas with a certain residual pressure, which contains a considerable amount of recyclable energy.

[0003] Currently, the mainstream technology in the field of waste pressure power generation from bio-fermentation is to use large-scale turbine units in series with multiple stages to convert waste pressure energy into power generation. However, this technology has revealed many insurmountable defects in practical applications. First, the multi-stage series units are bulky and heavy, which not only places high demands on the infrastructure of the installation site, but also presents problems such as difficult maintenance and operation, and long equipment overhaul periods. Moreover, the power generation efficiency of the units is low when operating at full load and partial load, with the overall system energy conversion efficiency being only about 50%. Second, the system is a centralized operating architecture, and a single point of failure can cause a complete shutdown. The system has poor risk resistance and a high risk of shutdown, which seriously affects the continuity of power generation in conjunction with fermentation production. Summary of the Invention

[0004] The purpose of this invention is to provide a power generation device and a power generation system for residual pressure in fermenters, so as to alleviate the technical problem of low power generation efficiency in the prior art.

[0005] In a first aspect, embodiments of the present invention provide a power generation device for residual pressure in a fermenter, including a support base, a permanent magnet direct-drive generator, and a single-pole high-speed turbine expander; Both the permanent magnet direct-drive generator and the single-pole high-speed turbine expander are mounted on the support base. The output shaft of the single-pole high-speed turbine expander is connected to the permanent magnet direct-drive generator.

[0006] In conjunction with the first aspect, the present invention provides a possible implementation of the first aspect, wherein the above-mentioned single-stage high-speed turbine expander adopts an axial-flow high-speed expander impeller.

[0007] In conjunction with the first aspect, the present invention provides a possible implementation of the first aspect, wherein the above-mentioned single-stage high-speed turbine expander adopts a centripetal high-speed expander impeller.

[0008] In conjunction with the first aspect, the present invention provides a possible implementation of the first aspect, wherein the air inlet of the above-mentioned single-stage high-speed turbine expander is provided with an air inlet guide hood for connection with an air storage tank.

[0009] In conjunction with the first aspect, the present invention provides a possible implementation of the first aspect, wherein the above-mentioned air intake shroud is provided with a conical air guide platform corresponding to the impeller of the single-stage high-speed turbine expander.

[0010] In conjunction with the first aspect, the present invention provides a possible implementation of the first aspect, wherein the exhaust port of the above-mentioned single-stage high-speed turbine expander is provided with an exhaust guide shroud, and an exhaust guide plate is provided inside the exhaust guide shroud.

[0011] In conjunction with the first aspect, the present invention provides one possible implementation of the first aspect, wherein the permanent magnet direct drive generator is provided with a cooling sleeve.

[0012] In conjunction with the first aspect, the present invention provides a possible implementation of the first aspect, wherein the above-mentioned single-stage high-speed turbine expander is provided with cooling pipes.

[0013] In conjunction with the first aspect, the present invention provides a possible implementation of the first aspect, wherein the output shaft of the aforementioned single-pole high-speed turbine expander is connected to the permanent magnet direct-drive generator via a coupling.

[0014] Secondly, embodiments of the present invention provide a residual pressure power generation system, including multiple gas storage tanks and a power generation device for residual pressure in the fermentation tank; Each of the gas storage tanks is individually connected to a generator for generating electricity to compensate for the residual pressure in the fermentation tank.

[0015] Beneficial effects: This invention provides a power generation device for residual pressure in a fermenter, including a support base, a permanent magnet direct-drive generator, and a single-pole high-speed turbine expander; both the permanent magnet direct-drive generator and the single-pole high-speed turbine expander are mounted on the support base; the output shaft of the single-pole high-speed turbine expander is connected to the permanent magnet direct-drive generator via a transmission connection.

[0016] Specifically, the single-stage high-speed turbine expander is connected to the fermentation gas storage tank. The high-speed airflow discharged from the gas storage tank impacts the impeller blades of the single-stage high-speed turbine expander, generating a continuous circumferential thrust on the blades and driving the impeller to rotate at high speed. The impeller is directly connected to the permanent magnet direct drive generator, which drives the permanent magnet direct drive generator to rotate and generate electricity. There are no intermediate transmission components such as gearboxes, thus avoiding transmission losses.

[0017] This invention provides a waste pressure power generation system, including multiple gas storage tanks and a waste pressure power generation device for fermentation tanks; each gas storage tank is individually connected to a waste pressure power generation device for fermentation tanks. The waste pressure power generation system has the advantages described above compared to existing technologies, which will not be elaborated further here. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of a power generation device for residual pressure in a fermenter provided in an embodiment of the present invention; Figure 2 This is an internal schematic diagram of the power generation equipment for residual pressure in a fermenter provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the air inlet duct in the power generation equipment for residual pressure in the fermenter provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the modular arrangement of the power generation equipment for residual pressure in the fermenter provided in an embodiment of the present invention.

[0020] icon: 100 - Support base; 200-Permanent Magnet Direct Drive Generator; 300 - Single-stage high-speed turbine expander; 310 - Inlet air guide shroud; 311 - Conical air guide platform; 320 - Exhaust air guide shroud; 321 - Exhaust guide plate; 400-Gas Storage Tank. Detailed Implementation

[0021] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and 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 invention.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0024] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0025] The present invention will now be described in further detail with reference to specific embodiments and accompanying drawings.

[0026] See Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, this embodiment provides a power generation device for residual pressure in a fermenter, including a support base 100, a permanent magnet direct-drive generator 200, and a single-pole high-speed turbine expander 300; both the permanent magnet direct-drive generator 200 and the single-pole high-speed turbine expander 300 are mounted on the support base 100; the output shaft of the single-pole high-speed turbine expander is connected to the permanent magnet direct-drive generator 200 for transmission.

[0027] Specifically, the single-stage high-speed turbine expander 300 is connected to the fermentation gas storage tank 400. The high-speed airflow discharged from the gas storage tank 400 impacts the impeller blades of the single-stage high-speed turbine expander 300, generating a continuous circumferential thrust on the blades and driving the impeller to rotate at high speed. The impeller is directly connected to the permanent magnet direct drive generator 200, which drives the permanent magnet direct drive generator 200 to rotate and generate electricity. There are no intermediate transmission components such as gearboxes, thus avoiding transmission losses.

[0028] Among them, the permanent magnet direct drive generator 200 is directly connected to the single-pole high-speed turbine expander 300. The full-load efficiency and part-load efficiency of the high-power permanent magnet direct drive generator 200 are on average 5% higher than those of the traditional synchronous excitation generator. In addition, the permanent magnet direct drive generator 200 adopts a water-cooled high-speed rotor, and its weight is 50% lower than that of the traditional generator.

[0029] It should be noted that the permanent magnet direct drive generator 200 and the single-pole high-speed turbine expander 300 are directly connected, eliminating the need for a gearbox. The direct connection structure has no transmission loss, resulting in an additional 5% improvement in overall system efficiency.

[0030] The single-stage high-speed turbine expander 300 uses an axial-flow high-speed expander impeller. Alternatively, the ultra-high-speed turbine expander uses a centripetal high-speed expander impeller. The single-stage high-speed turbine expander 300 can use either an axial-flow or centripetal high-speed expander impeller, with an impeller speed greater than 3000 RPM / MIN, achieving high-efficiency energy conversion under low operating conditions, with an efficiency of up to 89%, which is 15-20% higher than traditional multi-stage centrifugal turbine units.

[0031] It should also be noted that the permanent magnet direct drive generator 200 and the single-pole high-speed turbine expander 300 are integrated on the support base 100 to form an integral skid mount, which facilitates the arrangement.

[0032] See Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, in an optional embodiment, the air inlet of the single-stage high-speed turbine expander 300 is provided with an air inlet guide hood 310 for connection with the air storage tank 400.

[0033] Specifically, an air inlet guide shroud 310 is provided at the air inlet of the single-stage high-speed turbine expander 300. The air inlet guide shroud 310 is used to guide the high-speed gas in the gas storage tank 400 to the impeller of the single-stage high-speed turbine expander 300.

[0034] See Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, in an optional embodiment, the air intake shroud 310 is provided with a conical air guide platform 311 corresponding to the impeller of the single-stage high-speed turbine expander 300.

[0035] Specifically, a conical air guide platform 311 is provided inside the air inlet guide shroud 310. The conical air guide platform 311 allows the airflow to sweep onto the impeller, thereby improving the gas utilization rate.

[0036] See Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, in the optional embodiment, the exhaust port of the single-stage high-speed turbine expander 300 is provided with an exhaust hood 320, and an exhaust guide plate 321 is provided inside the exhaust hood 320.

[0037] Specifically, the single-stage high-speed turbine expander 300 is equipped with an exhaust hood 320, and an exhaust guide plate 321 is installed inside the exhaust hood 320. Through this arrangement, gas can be discharged quickly, the pressure drop utilization rate can be improved, and energy saving can be achieved. The overall system efficiency is about 75%.

[0038] See Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, in the optional embodiment, the permanent magnet direct drive generator 200 is provided with a cooling sleeve.

[0039] Specifically, the permanent magnet direct drive generator 200 is cooled by a cooling sleeve to ensure its normal operation and reduce losses.

[0040] See Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, in the optional embodiment, the single-stage high-speed turbine expander 300 is equipped with cooling pipes.

[0041] Specifically, a cooling pipe is installed on the single-stage high-speed turbine expander 300 to ensure the normal operation of the output shaft.

[0042] See Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, in the optional scheme of this embodiment, the output shaft of the single-pole high-speed turbine expander is connected to the permanent magnet direct drive generator 200 through a coupling.

[0043] Specifically, the single-pole high-speed turbine expander is directly connected to the permanent magnet direct-drive generator 200 via a coupling.

[0044] See Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, this embodiment provides a residual pressure power generation system, including multiple gas storage tanks 400 and a power generation device for residual pressure in fermentation tanks; each gas storage tank 400 is individually connected to a power generation device for residual pressure in fermentation tanks.

[0045] Specifically, the waste pressure power generation system adopts a modular layout. A permanent magnet direct-drive generator 200, a single-pole high-speed turbine expander 300, and a gas storage tank 400 are grouped together to form a single module. Multiple modules are integrated, ensuring that the remaining modules are unaffected by the shutdown of any single group, resulting in strong overall operational stability. This modular layout scheme is comprehensively superior to existing multi-stage series schemes in terms of reliability, operation and maintenance efficiency, and system security. The waste pressure power generation system provided in this embodiment can harvest energy from less than 1 kg of exhaust gas in the bio-fermentation industry using a single-pole high-speed turbine (centripetal / axial flow).

[0046] It should be noted that the modules are highly standardized, with 50% fewer parts, 70% smaller size, strong versatility, light overall weight, and convenient maintenance and replacement.

[0047] In addition, the residual pressure power generation system provided in this embodiment has the advantages of the above-mentioned residual pressure power generation equipment for fermenters compared with the prior art, which will not be elaborated here.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A power generation apparatus using residual pressure of a fermentation tank, characterized by comprising: include: Support base (100), permanent magnet direct drive generator (200) and single-pole high-speed turbine expander (300); The permanent magnet direct drive generator (200) and the single-pole high-speed turbine expander (300) are both mounted on the support base (100); The output shaft of the single-pole high-speed turbine expander is connected to the permanent magnet direct-drive generator (200) via a transmission.

2. The power generation equipment for residual pressure in fermenters according to claim 1, characterized in that, The single-stage high-speed turbine expander (300) adopts an axial-flow high-speed expander impeller.

3. The power generation equipment for residual pressure in fermenters according to claim 1, characterized in that, The single-stage high-speed turbine expander (300) adopts a centripetal high-speed expander impeller.

4. The power generation equipment for residual pressure in fermenters according to claim 1 or 2, characterized in that, The single-stage high-speed turbine expander (300) is equipped with an air inlet hood (310) for connection with the air storage tank (400).

5. The power generation equipment for residual pressure in fermenters according to claim 4, characterized in that, The air intake shroud (310) is provided with a conical air guide platform (311) corresponding to the impeller of the single-stage high-speed turbine expander (300).

6. The power generation equipment for residual pressure in fermenters according to claim 1, characterized in that, The exhaust port of the single-stage high-speed turbine expander (300) is provided with an exhaust hood (320), and an exhaust guide plate (321) is provided inside the exhaust hood (320).

7. The power generation equipment for residual pressure in fermenters according to claim 1, characterized in that, The permanent magnet direct drive generator (200) is equipped with a cooling sleeve.

8. The power generation equipment for residual pressure in fermenters according to claim 7, characterized in that, The single-stage high-speed turbine expander (300) is equipped with cooling pipes.

9. The power generation equipment for residual pressure in fermenters according to claim 8, characterized in that, The output shaft of the single-pole high-speed turbine expander is connected to the permanent magnet direct drive generator (200) via a coupling.

10. A waste pressure power generation system, characterized in that, It includes multiple gas storage tanks (400) and a power generation device for residual pressure in a fermenter as described in any one of claims 1-9; Each of the gas storage tanks (400) is individually connected to a generator for generating residual pressure in the fermentation tank.

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