Biomass stirling combined heat and power integrated device with flue gas isolation

Abstract

The present application relates to biomass energy utilization technical field, particularly to a kind of smoke gas isolation type biomass stirling combined heat and power integrated device, including device shell, multiple heat pipe parts, fixed disc and stirling engine;Device shell is through both ends, and the through is set as high-temperature passage, high-temperature passage is filled with high-temperature refractory filler between device shell;Multiple heat pipe parts are spacedly distributed in the upper of device shell, and both ends of heat pipe part are sealed, and the evaporation section of heat pipe part is sequentially penetrated into high-temperature passage into high-temperature refractory filler in device shell and high-temperature passage downwards, and the condensation section of heat pipe part is located outside device shell;Fixed disc is sleeved on heat pipe part, and is fixed on the upper surface of device shell, and the inner ring of fixed disc is abutted on the outer surface of heat pipe part, for positioning heat pipe part;Stirling engine hot head is attached with the condensation section of multiple heat pipe parts, for realizing the transfer of heat from heat pipe to stirling engine.

Description

Technical Field

[0001] This invention relates to the field of biomass energy utilization technology, and in particular to a flue gas isolated biomass Stirling cogeneration integrated device. Background Technology

[0002] With the increasing global demand for renewable energy, biomass energy, as a clean and carbon-neutral energy form, has received widespread attention and application. Biomass combined heat and power (CHP) technology can generate electricity and heat simultaneously, making it an important way to achieve efficient utilization of biomass energy.

[0003] As an external combustion heat engine, the Stirling engine has advantages such as wide heat source adaptability, high efficiency, and low noise, and is particularly suitable for heat recovery from biomass combustion.

[0004] However, existing technologies for directly heating Stirling engines with biomass have the following prominent problems: First, the flue gas produced by biomass combustion contains a large amount of ash, tar, and corrosive gases. If these gases come into direct contact with the hothead of the Stirling engine, it will lead to surface contamination, carbon buildup, and corrosion, severely reducing heat transfer efficiency and service life. Second, the heat transfer path in traditional methods is singular, making it difficult to achieve efficient and uniform extraction of heat from high-temperature flue gas. Summary of the Invention

[0005] Therefore, it is necessary to provide a flue gas-isolated biomass Stirling cogeneration integrated unit to address the aforementioned technical problems. By employing heat pipes as intermediate heat transfer elements, the high-temperature flue gas side is completely isolated from the Stirling engine hot head side. The Stirling engine hot head does not directly contact any flue gas or combustion products, completely avoiding carbon buildup, corrosion, and pollution problems, and significantly extending the equipment's service life and maintenance cycle.

[0006] This invention provides a flue gas isolated biomass Stirling cogeneration integrated unit, comprising: The device shell is open at both ends, and the open ends are set as high-temperature channels. The space between the device shell and the high-temperature channels is filled with high-temperature refractory filler. Multiple heat pipes are spaced apart above the outer shell of the device. The two ends of the heat pipes are sealed. The evaporation section of the heat pipe penetrates the outer shell of the device and the high-temperature refractory filler in sequence and enters the high-temperature channel. The condensation section of the heat pipe is located outside the outer shell of the device. A fixing plate is sleeved on the heat pipe fitting and fixed to the upper surface of the device housing. The inner ring of the fixing plate abuts against the outer surface of the heat pipe fitting for positioning the heat pipe fitting. The Stirling engine has a heat head that is attached to the condenser section of a plurality of heat pipe components to facilitate the transfer of heat from the heat pipes to the Stirling engine.

[0007] In one embodiment, the device housing includes a rectangular tube and a circular tube; the end face of the rectangular tube is rectangular in shape, the circular tube is inserted into the rectangular tube, and the outer ring of the circular tube fits the inner surface of the rectangular tube. The interior of the circular tube forms the high-temperature channel, and a through hole is formed on the upper surface of the rectangular tube, the through hole extending through to the high-temperature channel.

[0008] In one embodiment, the high-temperature refractory filler is a cement castable, which is filled between the rectangular tube and the circular tube. The through hole penetrates the cement castable, and multiple mounting holes are provided next to each through hole.

[0009] In one embodiment, the heat pipe includes a heat pipe body and heat sinks; the two ends of the heat pipe body are sealed, the evaporation section of the heat pipe body is inserted into the through hole and located in the high-temperature channel, and multiple heat sinks are provided, the multiple heat sinks are arranged at intervals at the ends of the evaporation section of the heat pipe body, and the two ends of the heat sinks are in the same direction as the high-temperature channel.

[0010] In one embodiment, the end of the evaporation section of the heat pipe body is configured as an arc-shaped surface, and the end of the condensation section of the heat pipe body is configured as a flat surface.

[0011] In one embodiment, the fixing plate includes a fixing plate and diagonal bracing pieces; the fixing plate has a through opening in the middle, and multiple diagonal bracing pieces are provided, which are distributed in a ring at intervals along the edge of the through opening. The bottom end of the diagonal bracing pieces is connected to the through opening, and the top end of the diagonal bracing pieces is inclined upward toward the central axis of the through opening. The fixing plate is fixed to the mounting hole by fasteners.

[0012] In one embodiment, the bracing plate and the fixing plate are integrally formed, and the bracing plate is elastic and will bend when subjected to force.

[0013] In one embodiment, the surface of the inclined support plate is curved, and the bending direction is consistent with the bending direction of the inner ring of the through opening.

[0014] In one embodiment, the outer ring of the heat pipe is provided with a plurality of annular grooves spaced apart. The end of the brace plate is subjected to an upward thrust, which causes it to deform and eventually retracts and abuts against the annular groove.

[0015] In one embodiment, the bottom of the Stirling engine's hot head is provided with multiple heat-conducting cavities, and the end of the condensing section of the heat pipe body is inserted into the heat-conducting cavity.

[0016] In the aforementioned flue gas-isolated biomass Stirling cogeneration integrated unit, during operation, the high-temperature flue gas generated by the combustion of biomass fuel in an external combustion furnace flows into a high-temperature channel from one end of the unit's outer shell. At this time, the evaporation sections (lower ends) of multiple spaced-apart heat pipes are pre-inserted into the high-temperature channel. The heat from the high-temperature flue gas is transferred to the working medium inside the heat pipes through the walls of the evaporation sections. The working medium absorbs heat and undergoes a phase change, rapidly carrying the heat to the condensation sections of the heat pipes located outside the unit. During this process, a fixing plate securely positions each heat pipe onto the unit's outer shell. Subsequently, the hot head of the Stirling engine comes into close contact with the surfaces of the condensation sections of the multiple heat pipes, absorbing heat and driving the Stirling engine to perform work, converting thermal energy into mechanical energy, which in turn drives a generator to produce electricity. Simultaneously, the waste heat from the Stirling engine and the waste heat from the flue gas flowing out of the high-temperature channel can be used for heating, realizing cogeneration.

[0017] By employing heat pipes as intermediate heat transfer elements, the high-temperature flue gas side is completely isolated from the Stirling engine's hot head side. The Stirling engine's hot head does not come into direct contact with any flue gas or combustion products, completely avoiding carbon buildup, corrosion, and pollution problems, and significantly extending the equipment's service life and maintenance cycles.

[0018] Heat pipes utilize the latent heat of phase change of the internal working fluid for heat transfer. They have extremely high thermal conductivity and isothermal properties, enabling them to efficiently transfer the heat of high-temperature flue gas to the Stirling engine hot head, thus reducing heat loss.

[0019] By arranging multiple heat pipes at intervals above the device housing, heat from the flue gas can be extracted evenly from different locations in the high-temperature channel, avoiding local overheating or undercooling, ensuring the uniformity and stability of the Stirling engine's heat head, and facilitating efficient engine operation.

[0020] By setting up a fixed plate to independently position and support each heat pipe component, the structural stability of the heat pipe array is ensured under high-temperature flue gas scouring and vibration environment. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 A three-dimensional structural diagram of the integrated biomass Stirling cogeneration device provided by the present invention; Figure 2 Cross-sectional structural diagram of the biomass Stirling cogeneration integrated device provided by the present invention; Figure 3A plan view of the integrated biomass Stirling cogeneration unit provided by the present invention; Figure 4 This is a schematic diagram of the structure of the device housing provided by the present invention; Figure 5 This is a schematic diagram of the structure of the heat pipe component provided by the present invention; Figure 6 This is a schematic diagram of the structure of the fixed disk provided by the present invention; Figure 7 This is a schematic diagram of the structure of the annular pad provided by the present invention; Figure 8 A partially disassembled structural diagram of the biomass Stirling cogeneration integrated device provided by the present invention.

[0023] Figure label: 100. Device housing; 110. Rectangular tube; 120. Circular tube; 121. High-temperature channel; 130. Through hole; 140. Mounting hole; 200. Cement castable; 300. Heat pipe fitting; 310. Heat pipe body; 311. Annular groove; 320. Heat sink; 400. Fixing plate; 410. Fixing plate; 411. Through opening; 420. Diagonal brace; 430. Fastener; 500. Annular gasket; 600. Heat head; 610. Heat conduction cavity. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. 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.

[0025] The following is combined Figures 1 to 8 This invention describes a flue gas isolated biomass Stirling cogeneration integrated device.

[0026] like Figures 1 to 3As shown, in one embodiment, a flue gas-isolated biomass Stirling cogeneration integrated unit includes a unit housing 100, multiple heat pipes 300, a fixed plate 400, and a Stirling engine; the unit housing 100 is open at both ends, with the open ends configured as high-temperature channels 121, and high-temperature refractory filler is used to fill the space between the unit housing 100 and the high-temperature channels 121; multiple heat pipes 300 are spaced apart above the unit housing 100, with both ends of the heat pipes 300 sealed, and the evaporation sections of the heat pipes 300 facing downwards. The secondary penetration device housing 100 and high-temperature refractory filler enter the high-temperature channel 121. The condensation section of the heat pipe 300 is located outside the housing 100. The fixing plate 400 is sleeved on the heat pipe 300 and fixed to the upper surface of the housing 100. The inner ring of the fixing plate 400 abuts against the outer surface of the heat pipe 300 for positioning the heat pipe 300. The Stirling engine hot head 600 is in contact with the condensation sections of multiple heat pipes 300 to realize the transfer of heat from the heat pipe to the Stirling engine.

[0027] In the aforementioned flue gas-isolated biomass Stirling cogeneration integrated unit, during operation, the high-temperature flue gas generated by the combustion of biomass fuel in an external combustion furnace flows into the high-temperature channel 121 from one end of the unit's outer shell 100. At this time, the evaporation sections (lower ends) of multiple spaced-apart heat pipes 300 are pre-inserted into the high-temperature channel 121. The heat from the high-temperature flue gas is transferred to the working medium inside the heat pipe 300 through the wall of its evaporation section. The working medium absorbs heat and undergoes a phase change, rapidly carrying the heat to the condensation section of the heat pipe 300 located outside the unit. During this process, a fixing plate 400 securely positions each heat pipe 300 onto the unit's outer shell 100. Subsequently, the hot head 600 of the Stirling engine is in close contact with the surfaces of the condensation sections of the multiple heat pipes 300, absorbing heat and driving the Stirling engine to perform work, converting thermal energy into mechanical energy, which in turn drives a generator to produce electricity. Simultaneously, the waste heat from the Stirling engine and the waste heat from the flue gas flowing out of the high-temperature channel 121 can be used for heating, realizing cogeneration.

[0028] By employing heat pipe 300 as an intermediate heat transfer element, the high-temperature flue gas side is completely isolated from the Stirling engine hot head 600 side. The Stirling engine hot head 600 does not come into direct contact with any flue gas or combustion products, completely avoiding carbon buildup, corrosion, and pollution problems, and significantly extending the service life and maintenance cycle of the equipment.

[0029] The heat pipe utilizes the latent heat of phase change of the internal working fluid for heat transfer. It has extremely high thermal conductivity and isothermal properties, and can efficiently transfer the heat of high-temperature flue gas to the Stirling engine hot head 600, reducing heat loss.

[0030] By arranging multiple heat pipes 300 at intervals above the housing 100, heat from the flue gas can be extracted evenly from different positions in the high-temperature channel 121, avoiding local overheating or overcooling, ensuring the uniformity and stability of the Stirling engine heat head 600, and facilitating efficient engine operation.

[0031] By setting up a fixed plate 400 to independently position and support each heat pipe component 300, the structural stability of the heat pipe array is ensured under high-temperature flue gas scouring and vibration environment.

[0032] like Figure 4 As shown, in one embodiment, the device housing 100 includes a rectangular tube 110 and a circular tube 120; the end face of the rectangular tube 110 is arranged in a rectangular structure, the circular tube 120 is inserted into the rectangular tube 110, and the outer ring of the circular tube 120 fits the inner surface of the rectangular tube 110. The interior of the circular tube 120 forms a high-temperature channel 121. A through hole 130 is opened on the upper surface of the rectangular tube 110, and the through hole 130 extends through to the high-temperature channel 121.

[0033] Specifically, the outer casing 100 of the device adopts a double-layer structure with a rectangular tube 110 inside a circular tube 120. The rectangular tube 110 serves as the outer frame, and a high-temperature channel 121 is directly formed inside the circular tube 120. The outer wall of the circular tube 120 is attached to the inner wall of the rectangular tube 110, and a filling cavity is formed between the two.

[0034] This "pipe-in-pipe" structure not only enhances the overall strength of the device shell 100, but more importantly, it provides a regular space for filling high-temperature refractory materials, ensuring that the circular cross-section of the high-temperature channel 121 is conducive to the smooth flow of flue gas. At the same time, the rectangular outer tube makes it easy to open through holes 130 and mounting holes 140 on the plane, which facilitates the installation of heat pipe fittings 300 and fixing plate 400.

[0035] In one embodiment, the high-temperature refractory filler is cement castable 200, which is filled between the rectangular tube 110 and the circular tube 120. The through hole 130 penetrates the cement castable 200, and multiple mounting holes 140 are provided next to each through hole 411.

[0036] Specifically, cement castable 200 is filled into the cavity between the rectangular tube 110 and the circular tube 120 as a high-temperature refractory filler. After the cement castable 200 solidifies, it can both fix the position of the circular tube 120 and provide an excellent heat insulation layer. The through hole 130 and the mounting hole 140 both penetrate this castable layer.

[0037] Cement castable refractory 200 is inexpensive, easy to construct, and has good high-temperature resistance. It effectively blocks heat from radiating from the high-temperature channel 121 to the outside of the shell, reducing heat loss, improving energy efficiency, and protecting external structural components.

[0038] like Figure 5 As shown, in one embodiment, the heat pipe 300 includes a heat pipe body 310 and a heat sink 320; the two ends of the heat pipe body 310 are sealed, the evaporation section of the heat pipe body 310 is inserted into the through hole 130 and located in the high temperature channel 121, and multiple heat sinks 320 are provided, the multiple heat sinks 320 are arranged at intervals at the ends of the evaporation section of the heat pipe body 310, and the two ends of the heat sinks 320 are in the same direction as the high temperature channel 121.

[0039] Specifically, the heat sink 320 significantly increases the contact area between the heat pipe evaporator section and the high-temperature flue gas, enhancing the convective heat transfer effect. The arrangement direction of the heat sink 320 is perpendicular to the flue gas flow direction, minimizing resistance to flue gas flow, avoiding excessive local pressure drop, and ensuring smooth system ventilation.

[0040] In one embodiment, the end of the evaporation section of the heat pipe body 310 is configured as an arc-shaped surface, and the end of the condensation section of the heat pipe body 310 is configured as a flat surface.

[0041] Specifically, the end of the evaporation section of the heat pipe body 310 (the part inserted into the high-temperature channel 121) is set as an arc-shaped surface, and the end of its condensation section (the part in contact with the Stirling engine hot head 600) is set as a flat surface.

[0042] The curved surface design of the evaporator section makes its surface smoother, further reducing turbulence and resistance to the flue gas, and also has a certain self-cleaning effect, making it less prone to dust accumulation. The planar design of the condenser section increases the contact area with the Stirling engine's 600 heat exchanger, reduces contact thermal resistance, and improves the efficiency of heat transfer to the engine.

[0043] like Figure 6 As shown, in one embodiment, the fixed plate 400 includes a fixed plate 410 and a diagonal brace 420; the fixed plate 410 has a through opening 411 in the middle, and multiple diagonal braces 420 are provided. The multiple diagonal braces 420 are distributed in a ring at intervals on the edge of the through opening 411. The bottom end of the diagonal brace 420 is connected to the through opening 411, and the top end of the diagonal brace 420 is inclined upward toward the central axis of the through opening 411. The fixed plate 410 is installed and fixed in the mounting hole 140 by fasteners 430.

[0044] Specifically, the mounting plate 400 includes a mounting plate 410 and a plurality of diagonal bracing plates 420 thereon. The diagonal bracing plates 420 extend obliquely upward and inward from the edge of the through-hole 411. During installation, the heat pipe 300 passes through this through-hole 411, the mounting plate 410 is fixed to the housing by fasteners 430, and the top of the diagonal bracing plates 420 elastically presses against the outer surface of the heat pipe 300.

[0045] Multiple inclined support plates 420 apply centripetal pressure evenly to the heat pipe fitting 300 from the circumferential direction, which can adaptively center and clamp fittings with different diameter tolerances, while allowing the heat pipe to have a certain amount of fine adjustment space when it expands due to heat.

[0046] In one embodiment, the bracing plate 420 and the fixing plate 410 are integrally formed, and the bracing plate is elastic and will bend when subjected to force.

[0047] Specifically, the inclined support plate 420 and the fixing plate 410 are manufactured as a single piece (e.g., by stamping), and the inclined support plate 420 itself is elastic. When the heat pipe 300 passes through, the inclined support plate 420 is subjected to force and undergoes elastic bending, generating a reverse clamping force.

[0048] It utilizes the clamping force generated by the elasticity of the material itself, eliminating the need for additional springs or other parts, resulting in high reliability and easy, quick assembly and disassembly.

[0049] like Figure 7 As shown, in one embodiment, the surface of the inclined support plate 420 is curved, and the bending direction is consistent with the bending direction of the inner ring of the through port 411. An annular gasket 500 is sandwiched between the inclined support plate and the heat pipe body 310. The annular gasket 500 deforms when it is squeezed by the inclined support plate, thereby improving the sealing performance at the junction of the heat pipe body 310 and the rectangular tube 110.

[0050] Specifically, the surface of the inclined support plate 420 is curved, and the curvature of its curvature is consistent with the arc direction of the inner circle of the through-hole 411.

[0051] The curved surface allows the inclined support plate 420 to form an approximate line contact or a small area surface contact with the outer surface of the cylindrical heat pipe component 300, resulting in a tighter fit and more uniform stress distribution compared to a planar sheet structure, thus improving the stability and reliability of the clamping.

[0052] In one embodiment, the outer ring of the heat pipe 300 is provided with a plurality of annular grooves 311 spaced apart. The end of the inclined support plate is subjected to an upward thrust, which causes it to deform and eventually retracts and abuts against the annular grooves 311.

[0053] Specifically, multiple annular grooves 311 are pre-formed on the outer ring of the heat pipe fitting 300. When the top of the inclined support plate 420 is pushed upward by the heat pipe fitting 300, it deforms and eventually contracts and gets stuck in the corresponding annular groove 311.

[0054] The engagement of the annular groove 311 and the inclined support plate 420 forms an axial positioning and locking mechanism. This not only prevents the heat pipe component 300 from moving up and down when subjected to vibration or thermal expansion and contraction, but also provides a clear indication of the installation position, further enhancing the accuracy and stability of the positioning.

[0055] like Figure 8As shown, in one embodiment, the bottom of the hot head 600 of the Stirling engine is provided with a plurality of heat-conducting cavities 610, and the end of the condensing section of the heat pipe body 310 is inserted into the heat-conducting cavity 610.

[0056] Specifically, at the bottom of the Stirling engine's hot head 600, corresponding to the position of each heat pipe component 300, multiple blind holes or through holes are provided as heat conduction chambers 610. The end of the condensing section of the heat pipe body 310 (set as a flat surface) is tightly inserted into this heat conduction chamber 610.

[0057] The plug-in structure significantly increases the heat transfer contact area between the heat pipe condenser section and the Stirling engine hot head 600. Compared to a simple planar fit, this embedded design significantly reduces contact thermal resistance, enabling efficient "surface-to-surface" heat transfer from the heat pipe to the engine, and also facilitates the compact integration of the overall structure.

[0058] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0059] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A flue gas isolated biomass Stirling cogeneration integrated unit, characterized in that, include: The device shell is open at both ends, and the open ends are set as high-temperature channels. The space between the device shell and the high-temperature channels is filled with high-temperature refractory filler. Multiple heat pipes are spaced apart above the outer shell of the device. The two ends of the heat pipes are sealed. The evaporation section of the heat pipe penetrates the outer shell of the device and the high-temperature refractory filler in sequence and enters the high-temperature channel. The condensation section of the heat pipe is located outside the outer shell of the device. A fixing plate is sleeved on the heat pipe fitting and fixed to the upper surface of the device housing. The inner ring of the fixing plate abuts against the outer surface of the heat pipe fitting for positioning the heat pipe fitting. The Stirling engine has a heat head that is attached to the condenser section of a plurality of heat pipe components to facilitate the transfer of heat from the heat pipes to the Stirling engine.

2. The flue gas isolated biomass Stirling cogeneration integrated unit according to claim 1, characterized in that, The outer casing of the device includes a rectangular tube and a circular tube; the end face of the rectangular tube is rectangular in shape, the circular tube is inserted into the rectangular tube, and the outer ring of the circular tube fits the inner surface of the rectangular tube. The interior of the circular tube forms the high-temperature channel, and a through hole is opened on the upper surface of the rectangular tube, the through hole extending through to the high-temperature channel.

3. The flue gas isolation type biomass Stirling cogeneration integrated unit according to claim 2, characterized in that, The high-temperature refractory filler is a cement castable, which is filled between the rectangular tube and the circular tube. The through hole passes through the cement castable, and multiple mounting holes are provided next to each through hole.

4. The flue gas isolation type biomass Stirling cogeneration integrated device according to claim 3, characterized in that, The heat pipe assembly includes a heat pipe body and heat sinks; both ends of the heat pipe body are sealed, the evaporation section of the heat pipe body is inserted into the through hole and located in the high-temperature channel, and multiple heat sinks are provided, which are arranged at intervals at the ends of the evaporation section of the heat pipe body, and the two ends of the heat sinks are in the same direction as the high-temperature channel.

5. The flue gas isolation type biomass Stirling cogeneration integrated unit according to claim 4, characterized in that, The end of the evaporation section of the heat pipe body is set as an arc surface, and the end of the condensation section of the heat pipe body is set as a plane.

6. The flue gas isolated biomass Stirling cogeneration integrated unit according to claim 5, characterized in that, The fixing plate includes a fixing plate and diagonal bracing pieces; the fixing plate has a through opening in the middle, and multiple diagonal bracing pieces are provided. The multiple diagonal bracing pieces are distributed in a ring at intervals along the edge of the through opening. The bottom end of the diagonal bracing piece is connected to the through opening, and the top end of the diagonal bracing piece is inclined upward toward the central axis of the through opening. The fixing plate is installed and fixed in the mounting hole by fasteners.

7. The flue gas isolation type biomass Stirling cogeneration integrated unit according to claim 6, characterized in that, The diagonal brace and the fixing plate are integrally formed, and the diagonal brace is elastic and will bend when subjected to force.

8. The flue gas isolated biomass Stirling cogeneration integrated unit according to claim 7, characterized in that, The surface of the inclined support piece is curved, and the bending direction is consistent with the bending direction of the inner ring of the through opening.

9. The flue gas isolation type biomass Stirling cogeneration integrated unit according to claim 8, characterized in that, The outer ring of the heat pipe is provided with multiple annular grooves spaced apart. The end of the inclined support plate is subjected to an upward thrust, which causes it to deform and eventually retract and abut against the annular groove.

10. The flue gas isolated biomass Stirling cogeneration integrated unit according to claim 9, characterized in that, The bottom of the Stirling engine's hot head is provided with multiple heat-conducting cavities, and the end of the condensing section of the heat pipe body is inserted into the heat-conducting cavity.

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