Waste heat recovery device of biomass particle fuel furnace

Abstract

The invention provides a waste heat recovery device for a biomass particle fuel furnace, and relates to the technical field of waste heat recovery devices. A replacement part is arranged in the mounting part; two groups of dispersing parts are arranged outside the mounting part; an adjusting part is arranged in each dispersing part; when the content of waste heat of tail gas is high, the inner adjusting end head is rotated to enable the communicating opening to be aligned with more connecting through holes, cold liquid is distributed to more replacement pipes through the flow dividing grooves, and the heat exchange area is increased to fully recycle waste heat; when the waste heat content is low, the aligning number of the communicating openings and the connecting through holes is reduced, replacement efficiency reduction caused by excessive cold liquid is avoided, and the problems that when the flue gas waste heat content is low, if an existing device still maintains the fixed cold liquid input amount, the cold liquid is likely to be excessive, then energy balance in the cold and hot replacement process is damaged, and the replacement efficiency is affected are solved. The waste heat recovery efficiency is reduced, and the expected replacement effect cannot be achieved.

Description

Technical Field

[0001] This invention relates to the field of waste heat recovery devices, and particularly to waste heat recovery devices for biomass pellet fuel furnaces. Background Technology

[0002] In today's era where energy and environmental protection are of paramount importance, biomass pellet fuel, as a highly promising renewable energy source, is being widely applied in various fields. Biomass pellet fuel stoves use agricultural and forestry waste, such as straw, sawdust, bagasse, and rice husks, as the main raw materials. These materials are processed into pellets for combustion. Energy-saving boilers using biomass pellet fuel not only provide heat for production and daily life but also become an ideal substitute for traditional fossil fuels due to their relatively low pollution emissions. However, during the operation of biomass pellet fuel stoves, a large amount of waste heat is discharged with the flue gas generated by combustion, which not only causes a great waste of energy but also has a certain impact on the environment. Therefore, a waste heat recovery device is needed to facilitate the utilization of waste heat from biomass pellet fuel stoves.

[0003] Currently, most traditional waste heat recovery devices use the principle of hot-cold exchange to recover waste heat. However, when applied to biomass pellet fuel furnaces, the waste heat content in the flue gas varies significantly due to fluctuations in the furnace's combustion efficiency. When the waste heat content in the flue gas is at a low level, if the existing device maintains a fixed amount of cold liquid input, it is easy to cause excessive cold liquid, which in turn disrupts the energy balance of the hot-cold exchange process, leading to a decrease in waste heat recovery efficiency and failing to achieve the expected exchange effect. Summary of the Invention

[0004] This invention relates to a waste heat recovery device for biomass pellet fuel furnaces, which has an adjustment section and a dispersion section. When the waste heat content of the exhaust gas is high, the internal adjustment end is rotated to align the connecting port with more connecting through holes, and the cold liquid is distributed to more replacement pipes through the diversion channel, increasing the heat exchange area to fully recover the waste heat. When the waste heat content is low, the number of alignments between the connecting port and the connecting through holes is reduced to avoid the decrease in replacement efficiency caused by excessive cold liquid. This solves the core problem of mismatch between waste heat content fluctuations and cold liquid input in traditional devices, and achieves efficient waste heat recovery under different operating conditions.

[0005] This invention provides a waste heat recovery device for a biomass pellet fuel furnace, specifically comprising: an installation part; the installation part including a displacement cylinder; the displacement cylinder being threadedly connected to a mating cylinder; the displacement cylinder and the mating cylinder each having an adjustment groove inside; the displacement cylinder and the mating cylinder each having a mating interface on their partition plates; the displacement cylinder and the mating cylinder each having four sets of circumferentially distributed inner extension grooves on their outer surfaces; the installation part having a displacement section inside; the displacement section including a displacement tube; connecting screws fixed to both ends of the displacement tube; two sets of connecting screws each having a mating locking sleeve outside; and an inner... The mounting section includes two sets of dispersing sections on its exterior. Each set of dispersing sections includes a side connecting cylinder. A slot is formed in the middle of the interior of each set of side connecting cylinders. A flow divider is formed inside the slot. Four sets of circumferentially distributed connecting holes are provided between the flow divider and the slot. Two sets of stabilizing ring grooves are connected to the slot. Each set of dispersing sections has an adjusting section inside its interior. The adjusting section includes an inner adjusting end. The inner adjusting end is rotatably connected to the interior of the corresponding slot. Four sets of circumferentially distributed connecting ports are formed on the outer wall of the inner adjusting end. An inner head is fixedly connected to the end of the inner adjusting end.

[0006] Preferably, the outer wall end of the displacement cylinder is threaded, and the interior of the displacement cylinder is provided with a partition plate; the inner wall end of the mating cylinder is threaded for mating with the displacement cylinder, and the interior of the mating cylinder is provided with a partition plate; the displacement cylinder and the mating cylinder are respectively fixed to the outside of an air inlet.

[0007] Preferably, the interface is configured as a threaded through hole; the eight sets of inner extension grooves are respectively connected to the corresponding two sets of inter-adjustment grooves.

[0008] Preferably, the replacement tube is configured as a cylindrical tubular structure; the replacement tube is disposed inside the replacement cylinder and the mating cylinder; the two sets of connecting screws are respectively threaded into the corresponding mating interfaces.

[0009] Preferably, the inner adjusting groove is connected to a threaded through hole for engaging with the connecting screw head; the outer wall of the mating lock sleeve is provided with an adjusting side groove for connecting with external tools.

[0010] Preferably, the two sets of side connecting cylinders are respectively fixed inside the replacement cylinder and the matching cylinder; the two sets of side connecting cylinders are fixed with a connecting joint; the connecting joint is set inside the corresponding inter-adjustment groove; the connecting joint is connected to the corresponding inter-adjustment groove through a round hole; the connecting joint is connected to the corresponding diversion groove through a round hole.

[0011] Preferably, the two sets of side connecting cylinders are respectively provided with two sets of telescopic grooves inside; the four sets of telescopic grooves are respectively connected to the corresponding interlocking grooves through circular through holes; a locking block is slidably connected inside the telescopic groove; the locking block is set as a rectangular block structure, the locking block is provided with a pull handle, the locking block is fixedly connected with a rod for inserting into the circular through hole of the telescopic groove, and the locking block is provided with a spring.

[0012] Preferably, the inner adjusting end is configured as a cylindrical structure, and the inner adjusting end is configured as a cylindrical groove; the connecting port is aligned with the corresponding connecting through hole; the four sets of connecting ports are respectively connected to the cylindrical grooves in the inner adjusting end.

[0013] Preferably, the outer wall of the inner head is provided with a circumferentially distributed locking slot; a corresponding locking block is inserted into the inside of the locking slot; two sets of constraint rings are fixedly connected to the inner adjusting end; the two sets of constraint rings are respectively rotatably connected in the corresponding stabilizing ring grooves.

[0014] The waste heat recovery device for biomass pellet fuel furnace provided by this invention has the following beneficial effects: In this invention, through the coordinated design of the adjustment section and the dispersion section, the scale of the cold liquid heat exchange can be dynamically adjusted according to the waste heat content of the tail gas of the biomass pellet fuel furnace: when the waste heat content of the tail gas is high, the internal adjustment end is rotated to align the connecting port with more connecting through holes, and the cold liquid is distributed to more replacement pipes through the diversion channel to increase the heat exchange area and fully recover the waste heat; when the waste heat content is low, the number of alignments between the connecting port and the connecting through holes is reduced to avoid the decrease in replacement efficiency caused by excessive cold liquid.

[0015] In addition, the replacement cylinder and the mating cylinder in the installation section are connected by threads. The positioning function of the mating groove for the replacement section and the dispersion section can quickly build a stable main frame of the device, ensuring that the overall structure is not easily shifted during operation. The replacement tube is initially fixed by the connecting screw head and the mating interface, and then the tool is inserted through the inner groove to rotate the mating locking sleeve to complete the locking. When disassembling, the replacement tube can be removed for cleaning by reversing the operation. At the same time, the internal soot can be cleaned by loosening the threads of the replacement cylinder and the mating cylinder, which greatly reduces the maintenance difficulty and labor cost.

[0016] In addition, the inner adjustment end of the adjustment unit is not easy to shake when rotating and adjusting through the cooperation of the constraint ring and the stabilizing ring groove, which ensures the stability of the coolant delivery path. The locking block can be automatically inserted into the locking slot under the action of the spring to lock the adjustment position of the inner adjustment end, avoiding unexpected changes in coolant flow due to vibration during operation. At the same time, the expansion groove constrains the locking block to prevent it from falling off, further improving the safety and stability of the device operation.

[0017] In addition, the side-mounted cylinder of the distribution section achieves "on-demand distribution" of coolant through the combination of interstitial grooves, diversion grooves and connecting through holes: no additional power drive is required, and the number of replacement tubes participating in heat exchange can be controlled by mechanical adjustment alone. This avoids energy waste caused by excessive coolant and reduces problems such as uneven heating and pipe wall overheating caused by fixed pipeline layout in traditional equipment. It extends the service life of the equipment and improves the overall energy utilization efficiency. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0019] The accompanying drawings described below are only related to some embodiments of the invention and are not intended to limit the invention.

[0020] In the attached diagram: Figure 1 A schematic diagram of a three-dimensional assembly structure according to an embodiment of the present invention is shown; Figure 2 A schematic diagram of the three-dimensional assembly bottom view structure according to an embodiment of the present invention is shown; Figure 3 A schematic diagram of the exploded structure according to an embodiment of the present invention is shown; Figure 4 A schematic diagram of the exploded bottom view structure according to an embodiment of the present invention is shown; Figure 5 A schematic diagram of a partially cut-out structure according to an embodiment of the present invention is shown; Figure 6 The invention is illustrated by an embodiment of the invention. Figure 5 A schematic diagram of the enlarged structure of section A; Figure 7 The invention is illustrated by an embodiment of the invention. Figure 5 A schematic diagram of the enlarged structure of section B is shown. Figure 8 A schematic diagram of the mounting assembly structure according to an embodiment of the present invention is shown; Figure 9 A schematic diagram of the replacement part assembly structure according to an embodiment of the present invention is shown; Figure 10 A schematic diagram of the assembly structure of the distributed part according to an embodiment of the present invention is shown; Figure 11 A schematic diagram of the adjustment part assembly structure according to an embodiment of the present invention is shown.

[0021] List of reference numerals 1. Installation section; 101. Replacement cylinder; 102. Matching cylinder; 103. Adjustment groove; 104. Air inlet; 105. Butt joint; 106. Inner extension groove; 2. Replacement section; 201. Replacement tube; 202. Connecting screw; 203. Connecting locking sleeve; 204. Inner adjusting groove; 205. Adjusting side groove; 3. Dispersion section; 301. Side connecting cylinder; 302. Intermittent groove; 303. Diversion groove; 304. Connecting joint; 305. Connecting through hole; 306. Expansion groove; 307. Locking block; 308. Stabilizing ring groove; 4. Adjustment section; 401. Internal adjustment end; 402. Connecting port; 403. Internal tie head; 404. Locking slot; 405. Restraint ring. Detailed Implementation

[0022] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples.

[0023] Example 1: Please refer to Figures 1 to 11This invention proposes a waste heat recovery device for a biomass pellet fuel furnace, comprising: an installation part 1; the installation part 1 includes a displacement cylinder 101; the displacement cylinder 101 is used to assist in the installation and fixation of other structures of the device with a matching cylinder 102, so as to facilitate the overall stability of the device; the displacement cylinder 101 is threadedly connected to the matching cylinder 102; the matching cylinder 102 is used to assist in the installation and fixation of other structures of the device with the displacement cylinder 101, so as to facilitate the overall stability of the device and facilitate the transportation and treatment of the tail gas of the biomass pellet fuel furnace; the displacement cylinder 101 and the matching cylinder 102 are respectively provided with an adjustment groove 103; the adjustment groove 103 is used to assist in the assembly of the displacement part 2 and the dispersion part 3, so as to facilitate the stability of the connection; the displacement cylinder 101 and the matching cylinder 102... The partition plates are respectively provided with interface 105; interface 105 is used to assist in the connection with connecting screw head 202, so as to facilitate the stability of replacement tube 201 between replacement cylinder 101 and mating cylinder 102; four sets of circumferentially distributed inner extension grooves 106 are respectively provided on the outside of replacement cylinder 101 and mating cylinder 102; inner extension grooves 106 are used to facilitate the insertion of external tools into the interior of adjustment groove 103 to facilitate the adjustment of mating locking sleeve 203; the installation part 1 is provided with replacement part 2; replacement part 2 includes replacement tube 201; replacement tube 201 is used to cooperate with side connecting cylinder 301 to transport cold liquid, so as to facilitate the replacement treatment with exhaust gas, and facilitate the recovery treatment of exhaust gas from biomass pellet fuel furnace; replacement tube Connecting screw heads 202 are fixed to both ends of the 201. The connecting screw heads 202 are used to connect the replacement pipe 201 and the connector 304 with the mating locking sleeve 203 to facilitate the delivery of coolant. The two sets of connecting screw heads 202 are respectively provided with mating locking sleeves 203. The mating locking sleeves 203 are used to connect the connecting screw heads 202 and the connector 304 by rotation to facilitate the delivery of coolant. An inner adjustment groove 204 is provided inside the mating locking sleeve 203. The inner adjustment groove 204 assists in connecting the mating locking sleeve 203 and the connector 304, facilitating rotational adjustment. Two sets of dispersion sections 3 are provided outside the mounting part 1. Each set of dispersion sections 3 includes a side connecting cylinder 301. The side connecting cylinder 301 is used to... The internal regulating end 401 is used to transport and process the cold liquid, so as to facilitate the dispersion and collection of the cold liquid for the recovery of the tail gas of the biomass pellet fuel furnace. The two sets of side connecting cylinders 301 each have a middle section with a slotted groove 302. The slotted groove 302 is used to install the internal regulating end 401, facilitating its rotation and adjustment. A diversion groove 303 is provided inside the slotted groove 302. The diversion groove 303 is used to ensure sufficient heat exchange when the tail gas of the biomass pellet fuel furnace contains excessive heat, by adding a connecting replacement pipe 201, so as to facilitate the recovery and utilization of the waste heat of the tail gas. Four sets of circumferentially distributed connecting through holes 305 are provided between the diversion groove 303 and the slotted groove 302.The connecting through hole 305 is used to connect the interstitial tank 302 and the diversion tank 303 to facilitate the transportation and processing of the coolant. The interstitial tank 302 is connected to two sets of stabilizing ring grooves 308. The stabilizing ring grooves 308 are used to cooperate with the constraint ring 405 to keep the internal adjustment end 401 stable within the interstitial tank 302, facilitating its use. The two sets of dispersion sections 3 are respectively provided with adjustment sections 4. The adjustment section 4 includes an internal adjustment end 401. The internal adjustment end 401 is rotatably connected to the inside of the corresponding interstitial tank 302. The internal adjustment end 401 is used to cooperate with the internal head 403 to connect with the external coolant. The liquid conveying device is connected to facilitate the conveying of cold liquid. Four sets of circumferentially distributed connecting ports 402 are provided on the outer wall of the internal adjusting end 401. The connecting ports 402, after being aligned with the connecting through holes 305, allow for the expansion of the cold liquid flow, facilitating the increase in the number of cold liquid replacement pipes 201. An inner retaining head 403 is fixedly connected to the end of the internal adjusting end 401. The inner retaining head 403, in conjunction with the locking slot 404, constrains the internal adjusting end 401 and simultaneously conveys the cold liquid through connection with external cold liquid conveying equipment.

[0024] Example 2: Based on Example 1, as follows Figures 1 to 11 As shown, the outer wall end of the replacement cylinder 101 is threaded, and the interior of the replacement cylinder 101 is provided with a partition plate; the inner wall end of the mating cylinder 102 is threaded for mating with the replacement cylinder 101, and the interior of the mating cylinder 102 is provided with a partition plate; air inlets 104 are fixedly connected to the exterior of the replacement cylinder 101 and the mating cylinder 102 respectively.

[0025] The interface 105 is configured as a threaded through hole; the eight sets of internal extension grooves 106 are respectively connected to the corresponding two sets of inter-adjustment grooves 103.

[0026] The replacement tube 201 is configured as a cylindrical tubular structure; the replacement tube 201 is located inside the replacement cylinder 101 and the mating cylinder 102; two sets of connecting screws 202 are respectively threaded into the corresponding mating interfaces 105.

[0027] The inner adjusting groove 204 is connected to a threaded through hole for engaging with the connecting screw head 202; the outer wall of the mating lock sleeve 203 is provided with an adjusting side groove 205 for connecting with external tools.

[0028] Two sets of side-connecting cylinders 301 are respectively fixed inside the replacement cylinder 101 and the matching cylinder 102; a butt joint 304 is fixed on the two sets of side-connecting cylinders 301; the butt joint 304 is set inside the corresponding intermediate adjustment groove 103; the butt joint 304 is connected to the corresponding intermediate loading groove 302 through a round hole; the butt joint 304 is connected to the corresponding diversion groove 303 through a round hole.

[0029] Two sets of telescopic grooves 306 are respectively provided inside the two sets of side connecting cylinders 301; the four sets of telescopic grooves 306 are respectively connected to the corresponding interlocking grooves 302 through circular through holes; the telescopic grooves 306 are used to assist in the installation of locking blocks 307 to facilitate their telescopic adjustment; the locking blocks 307 are slidably connected inside the telescopic grooves 306; the locking blocks 307 are set as rectangular block structures, the locking blocks 307 are provided with pull handles, the locking blocks 307 are fixedly connected with insert rods for inserting into the circular through holes of the telescopic grooves 306, and the locking blocks 307 are provided with springs; the locking blocks 307 are used to fix the internal adjustment end 401 by inserting it into the locking slot 404 to facilitate maintaining its relative state in the interlocking grooves 302 and to facilitate the transportation of coolant.

[0030] The inner adjustment end 401 is configured as a cylindrical structure, and the inner adjustment end 401 is configured as a cylindrical groove; the connecting port 402 is aligned with the corresponding connecting through hole 305; the four sets of connecting ports 402 are respectively connected to the cylindrical groove in the inner adjustment end 401.

[0031] The outer wall of the inner head 403 is provided with a circumferentially distributed locking slot 404; a corresponding locking block 307 is inserted inside the locking slot 404; the locking slot 404 is used to lock the state of the inner adjusting end 401 in the interlocking groove 302 in cooperation with the locking block 307, so as to keep it stable; two sets of constraint rings 405 are fixedly connected to the inner adjusting end 401; the two sets of constraint rings 405 are respectively rotatably connected in the corresponding stabilizing ring groove 308; the constraint rings 405 are used to cooperate with the stabilizing ring groove 308 to keep the inner adjusting end 401 stable in the interlocking groove 302.

[0032] The specific usage and function of this embodiment: In this invention, the replacement cylinder 101 and the mating cylinder 102 are connected by tightening the end threads to align the internal adjustment grooves 103 of both, forming a complete flue gas channel; at this time, the external gas inlets 104 of both serve as the inlet and outlet of biomass tail gas, respectively, for connecting the fuel furnace exhaust pipe. The connecting screws 202 at both ends of the replacement pipe 201 are aligned with the mating interfaces 105 on the partition plates of the replacement cylinder 101 and the mating cylinder 102, and manually screwed in for initial fixation; then, a tool is inserted through the inner extension groove 106 to rotate the adjustment of the mating locking sleeve 203. The side groove 205 is used to lock the locking sleeve 203 and the connector 304, completing the connection and fixation between the replacement pipe 201 and the dispersion section 3. The high-temperature exhaust gas generated by the biomass fuel furnace enters the replacement cylinder 101 and the matching cylinder 102 through the gas interface 104 and flows through the outside of the replacement pipe 201. At the same time, the external cold liquid enters the inner adjustment end 401 through the inner bundle head 403, enters the side connecting cylinder 301 through the connecting port 402 and the connecting through hole 305, and is then transported to the inside of the replacement pipe 201 through the connector 304. Through the heat exchange between the hot and cold media inside and outside the replacement pipe 201, the exhaust gas waste heat is recovered. When the exhaust gas has a high waste heat content: pull the handle of the locking plug 307 to disengage it from the locking slot 404, release the lock on the internal adjustment end 401, rotate the internal adjustment end 401 so that the connecting port 402 on its outer wall is aligned with more sets of connecting through holes 305, and the coolant is distributed to more replacement pipes 201 through the diversion channel 303. Loosen the locking plug 307 so that it is reinserted into the corresponding locking slot 404 under the action of the spring, fix the position of the internal adjustment end 401, and increase the heat exchange area to fully recover the waste heat. When the waste heat content of the exhaust gas is low: repeat the above unlocking steps, rotate the internal adjustment end 401 to reduce the number of alignments between the connecting port 402 and the connecting through hole 305, reduce the number of replacement tubes 201 participating in heat exchange, and avoid excessive coolant affecting the replacement efficiency.

[0033] The following points should be noted in this article: 1. The accompanying drawings of the embodiments disclosed herein only relate to the structures involved in the embodiments disclosed herein; other structures can be referred to in general design.

[0034] 2. Where there is no conflict, the embodiments of this disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0035] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A biomass pellet fuel boiler waste heat recovery device, comprising: The utility model provides a kind of installation part;Its characterized in that the installation part includes replacement cylinder;The replacement cylinder is threadedly connected with cooperation cylinder;The inside of replacement cylinder and cooperation cylinder is respectively provided with interval groove;The partition of replacement cylinder and cooperation cylinder is respectively provided with docking interface;The outside of replacement cylinder and cooperation cylinder is respectively provided with four groups of circumferentially distributed inner extension groove;The inside of the installation part is equipped with replacement part;The replacement part includes replacement pipe;The both ends of the replacement pipe are respectively fixed with connecting screw head;The outside of two groups of connecting screw head is respectively provided with docking lock sleeve;The inside of the docking lock sleeve is provided with inner adjusting groove;The outside of the installation part is equipped with two groups of dispersion part;Two groups of the dispersion part respectively include side connection cylinder;The inside of two groups of the side connection cylinder is respectively provided with interval slot;The inside of the interval slot is provided with shunt groove;Between the interval slot and interval slot, four groups of circumferentially distributed connection through-hole are equipped;The interval slot is connected with two groups of stable ring groove;The inside of two groups of the dispersion part is respectively provided with adjusting part;The adjusting part includes inner adjusting end head;The inner adjusting end head is rotatably connected in the inside of corresponding interval slot;The outer wall of the inner adjusting end head is provided with four groups of circumferentially distributed communication port;The end head of the inner adjusting end head is fixed with inner bundle head.

2. The biomass pellet fuel furnace waste heat recovery device according to claim 1, characterized in that: The outside of the replacement cylinder is provided with thread at end head position, and the inside of the replacement cylinder is provided with a partition plate;The inner wall of the cooperation cylinder is provided with a thread at the end head position for cooperation with the replacement cylinder, and the inside of the cooperation cylinder is provided with a partition plate;The outside of the replacement cylinder and the cooperation cylinder is respectively fixed with a gas interface.

3. The biomass pellet fuel furnace waste heat recovery device according to claim 1, characterized in that: The docking interface is provided as a threaded through hole;Eight groups of the inner extension groove are respectively connected with two groups of corresponding interval grooves.

4. The biomass pellet fuel furnace waste heat recovery device according to claim 1, characterized in that: The replacement pipe is provided as a cylindrical tubular structure;The replacement pipe is arranged in the inside of the replacement cylinder and the cooperation cylinder;Two groups of the connecting screw head are respectively threadedly connected in the corresponding docking interface.

5. The biomass pellet fuel furnace waste heat recovery device according to claim 1, characterized in that: The inner adjusting groove is connected with a threaded through hole for cooperation with the connecting screw head;The outer wall of the docking lock sleeve is provided with an adjusting side groove for connection with external tools.

6. The biomass pellet fuel furnace waste heat recovery device according to claim 1, characterized in that: Two groups of the side connection cylinder are respectively fixed in the inside of the replacement cylinder and the cooperation cylinder;Two groups of the side connection cylinder are fixed with a docking head;The docking head is arranged in the inside of the corresponding interval groove;The docking head is connected with the corresponding interval slot through a circular hole;The docking head is connected with the corresponding shunt groove through a circular hole.

7. The biomass pellet fuel furnace waste heat recovery device according to claim 1, characterized in that: The inside of two groups of the side connection cylinder is respectively provided with two groups of expansion groove;Four groups of the expansion groove are respectively connected with the corresponding interval slot through circular through hole;The inside of the expansion groove is slidably connected with locking plug;The locking plug is provided as a rectangular block structure, and the locking plug is provided with a pull handle, and the locking plug is fixed with a plug rod for being inserted in the expansion groove connection circular through hole, and the locking plug is provided with a spring.

8. The biomass pellet fuel furnace waste heat recovery device according to claim 1, characterized in that: The inner adjusting end head is provided as a cylindrical structure, and the inner adjusting end head is provided as a cylindrical groove;The communication port is aligned with the corresponding connection through-hole;Four groups of the communication port are respectively connected with the cylindrical groove in the inner adjusting end head.

9. The biomass pellet fuel furnace waste heat recovery device according to claim 7, characterized in that: The outer wall of the inner beam head is provided with lock slot distributed in a circle; the lock slot is internally inserted with corresponding lock block; the inner adjusting end head is fixedly connected with two groups of constraint rings; the two groups of constraint rings are respectively rotationally connected in the corresponding stable ring slot.

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