Low-noise high-efficiency hot blast stove with heat recovery and noise reduction functions

Abstract

The application discloses a low-noise and high-efficiency hot blast furnace with heat recovery and noise reduction functions, and particularly relates to the technical field of hot blast furnaces, which comprises a furnace body, a maintenance hole is formed in the top surface of the furnace body, and a maintenance cover is fixedly installed on the top surface of the furnace body. The furnace body, the maintenance hole, the maintenance cover, the air outlet pipe, the secondary air inlet hole, the secondary combustion chamber, the heat-conducting plate, the first partition plate and the second partition plate are used in cooperation, so that the airflow in the furnace body is guided, the hot air generated by combustion is conveniently subjected to noise reduction treatment, the cold-heat exchange of the furnace body after use is achieved, and the effect of waste heat recovery is achieved. The adjusting plate, the secondary combustion chamber, the second partition plate, the fixing seat and the first heat recovery box are used in cooperation, so that the noise generated by the contact between the airflow and the adjusting plate is absorbed, and the effect of conveniently reducing the noise of the flowing hot air is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of hot blast stoves, and in particular to a low-noise and high-efficiency hot blast stove with heat recovery and noise reduction functions. Background Art

[0002] A hot blast furnace is a type of thermal power machine, primarily used to heat blast air to the high temperatures required by industry. It is widely used in metallurgy, building materials, agriculture, food processing, and other fields. A hot blast furnace converts chemical energy into thermal energy by burning fuel, and transfers the heat to the air flow through a heat exchanger to generate high-temperature hot air. Its core function is to provide a stable, high-temperature heat source for industrial production, replacing traditional electric or steam heat sources. Hot blast furnaces come in many varieties and a full range of series. They are categorized by coal-fired and machine-fired methods, by fuel type, into coal, oil, and gas furnaces, by output air temperature into high-temperature and medium-temperature furnaces, by conveying form into indirect and direct types, and by heat exchanger placement into combined and separate types. Large furnaces are equipped with coal pulverizers.

[0003] In the prior art, when the hot blast furnace is in use, it is necessary to inhale external air through a fan to provide sufficient oxygen for the combustion process. When operating at high power, the airflow inhaled from the outside will also increase, and then the external air will come into contact with the inner wall of the hot blast furnace duct. Then, since the shape of the air duct inside the hot blast furnace is generally in a fixed state after production, when the airflow enters the turning point inside the air duct, a sudden change in cross-section or a curvature radius that is too small will occur, and the airflow will be separated by inertia, causing local vortices and velocity gradients, thereby causing irregular air flow inside the hot blast furnace duct. At this time, the irregular airflow will continuously collide with the inner wall of the air duct, causing it to vibrate and generate noise, thereby generating noise pollution and affecting its use effect. Summary of the Invention

[0004] In view of the deficiencies in the prior art, the present invention provides a low-noise and high-efficiency hot blast furnace with heat recovery and noise reduction functions to solve the problems raised in the above background technology.

[0005] The above technical objectives of the present invention are achieved through the following technical solutions:

[0006] A low-noise, high-efficiency hot air furnace with heat recovery and noise reduction functions, comprising a furnace body, a top surface of the furnace body having an inspection hole, a top surface of the furnace body having an inspection cover fixedly mounted thereon, an air outlet duct fixedly mounted on one side of the furnace body, and two secondary air inlet holes being disposed on one side of the furnace body;

[0007] The inner bottom surface of the furnace body is fixedly mounted with a combustion heating component, which is used to heat the air to generate hot air, and cooperates with the air outlet pipe to discharge the hot air for use;

[0008] A secondary combustion chamber is provided inside the furnace body, a heat conducting plate is provided on the outer circumferential wall of the secondary combustion chamber, a first partition is provided on the outer circumferential wall of the heat conducting plate, a second partition is provided on the outer circumferential wall of the first partition, various partition spaces are formed inside the furnace body by the heat conducting plate, the first partition and the second partition to form an air duct, and exhaust holes are provided on the outer circumferential walls of the heat conducting plate, the first partition and the second partition;

[0009] The outer circumferential wall surfaces of the secondary combustion chamber and the second partition are both provided with noise reduction components, and are used to reduce the noise of the hot air flow when the hot air is generated inside the furnace body;

[0010] The secondary combustion chamber and the outer circumferential wall of the first partition are both provided with waste heat recovery components, and are used to recover part of the waste heat inside the furnace body after the hot air inside the furnace body is used up;

[0011] An adjustment component is provided inside the furnace body, and is used to adjust the use of the noise reduction component in cooperation with the waste heat recovery component, so as to facilitate noise reduction processing of hot air with different flow rates.

[0012] By adopting the above technical solution, when hot air is generated inside the furnace body, various spaced air ducts are formed inside the furnace body through the heat conduction plate, the first partition and the second partition to separate the hot air and evenly distribute the hot air. When the hot air flows out for use, it is subjected to noise reduction treatment by the noise reduction component. After the hot air is used, the residual heat remaining inside the furnace body can be recovered and utilized by the waste heat recovery component. When the hot air flow rate is different, the noise reduction component can be adjusted using the adjustment component to adapt to hot air with different flow rates. In this way, the noise reduction treatment of the hot air generated by combustion and the waste heat recovery of the hot air are facilitated when the furnace body is in use.

[0013] Preferably, the noise reduction component includes: a plurality of adjustment plates, which are respectively arranged on the outer circular wall of the secondary combustion chamber and the second partition plate, and the outer circular wall of the secondary combustion chamber and the outer circular wall of the second partition plate are fixedly installed with a plurality of fixing seats, the adjustment plates are rotatably connected to the fixing seats, and the outer circular wall of the secondary combustion chamber is slidably connected to a plurality of first heat recovery boxes, the adjustment plates are spiral arc-shaped, the side of which is at an angle of forty-five degrees, and the surface is coated with sound-absorbing and high-temperature resistant silica hydrochloric acid paint.

[0014] By adopting the above technical solution, when the airflow passes through the surface of the adjustment plate, since the adjustment plate is spirally arc-shaped and has a forty-five-degree angled side, and the surface is coated with sound-absorbing and high-temperature resistant silicate acid coating, the direction of the airflow will be guided by the adjustment plate, reducing the impact noise generated by the contact between the airflow and the secondary combustion chamber and the surface of the heat conduction plate. At the same time, since the high-temperature silicate acid coating on the surface of the adjustment plate has closed micropores and a mesh fiber structure, it will absorb the noise generated by the contact between the airflow and the adjustment plate, thereby achieving the effect of noise reduction of the flowing hot air.

[0015] Preferably, the waste heat recovery component includes: a plurality of first heat recovery boxes, the plurality of first heat recovery boxes are all slidably connected to the outer circular wall of the secondary combustion chamber, the outer circular wall of the first partition is slidably connected to a plurality of second heat recovery boxes, the outer circular wall of the secondary combustion chamber is provided with a water inlet pipe, the water inlet pipe passes through the first partition and the heat conducting plate and is fixedly sleeved with the inner circular wall of the plurality of first heat recovery boxes, the outer circular wall of the first partition is provided with a connecting pipe, the connecting pipe is fixedly sleeved with the inner circular wall of the plurality of second heat recovery boxes, and an exhaust pipe is provided between the first partition and the secondary combustion chamber. Water pipe, the drainage pipe is fixedly connected with the inner circular wall of the first heat recovery box and the second heat recovery box respectively, the drainage pipe passes through the heat conduction plate, the inner circular wall of the drainage pipe and the inner circular wall of the water inlet pipe are fixedly connected with a socket pipe, the socket pipe passes through the first partition, the second partition and the heat conduction plate, and extends to the outside of the furnace body, the outer circular walls of several first heat recovery boxes are fixedly installed with a socket frame, the outer circular wall of the heat conduction plate is provided with several first adjustment holes, the first adjustment hole is movably connected with the socket frame, and both sides of the socket frame are rotatably connected to the adjustment plate.

[0016] By adopting the above technical solution, the hot air inside the furnace body can be discharged for use by connecting the external pipe to the air outlet pipe, and the air outlet volume of the air outlet pipe can be adjusted by rotating the air flow control plug inside the air outlet pipe. When the hot air inside the furnace body is exhausted, the staff rotates the two adjusting bolts in the opposite direction, and the circular opening inside the adjusting block will be opened. At the same time, the adjusting bolt drives the sealing plug to re-enter the interior of the circular through hole to seal it. Then the staff connects and installs the external water source and the external heat recovery water tank with the two flange joints respectively. At this time, the external water source can be transported to the interior of multiple second heat recovery tanks through the flange joints and the water inlet pipe. After the water inside the second heat recovery tank is full, the water flow will enter the interior of multiple first heat recovery tanks through the drain pipe, and then the residual heat inside the furnace body can be taken away by the cold water inside the multiple first heat recovery tanks and the multiple second heat recovery tanks, thereby achieving the effect of recovering waste heat inside the furnace body.

[0017] Preferably, the adjustment assembly includes: a plurality of first connecting frames, a plurality of the first connecting frames are respectively fixedly mounted on the outer circular walls of a plurality of the first heat recovery boxes, a plurality of second connecting frames are respectively fixedly mounted on the outer circular walls of a plurality of the second heat recovery boxes, the positions of the plurality of the first connecting frames respectively correspond to the positions of the plurality of the second connecting frames, one end of the first connecting frame is fixedly mounted on the second heat recovery box, a plurality of second adjustment holes are respectively opened on the outer circular walls of the second partition plate and the first partition plate, a plurality of the first connecting frames and a plurality of the second connecting frames are respectively movably connected to the plurality of the second adjustment holes, an adjusting screw is rotatably connected to the interior of the furnace body, the adjusting screw is respectively threadedly connected to the plurality of the second connecting frames, a scale ring is fixedly mounted on the top surface of the furnace body, the position of the scale ring corresponds to the adjusting screw, and both sides of the second connecting frame are rotatably connected to the adjustment plate.

[0018] By adopting the above technical solution, when the air intake speed of the external fan changes, the staff can rotate the adjusting screw, and then under the threaded transmission action of the adjusting screw, multiple second connecting frames will drive multiple second heat recovery boxes to move up and down at the same time, and then under the connection action of multiple first connecting frames, multiple first heat recovery boxes will move up and down together, and then the multiple supporting frames outside the first heat recovery box will move and drive the multiple adjustment plates outside the secondary combustion chamber to rotate, and at the same time, the up and down movement of multiple second connecting frames will drive the multiple adjustment plates outside the second partition to rotate, and then the use angles of the multiple adjustment plates can be adjusted, so as to achieve the effect of making it suitable for hot air with different flow rates.

[0019] Preferably, the top surface of the secondary combustion chamber is fixedly mounted with a mounting sleeve, the interior of the mounting sleeve is fixedly sleeved with a first filter plate, the inner circular wall surface of the mounting sleeve is threadedly connected to a second filter plate, the interior of the first filter plate is rotatably connected to a rotating shaft, the outer circular wall surface of the rotating shaft is fixedly sleeved with a first mounting bracket, the bottom surface of the rotating shaft is fixedly mounted with a second mounting bracket, the bottom surface of the first mounting bracket and the top surface of the second mounting bracket are respectively provided with two mounting plates, the interiors of the first mounting bracket and the second mounting bracket are slidably connected with a number of positioning columns, one end of the positioning column is fixedly mounted on the mounting plate, the outer circular wall surface of the positioning column is movably sleeved with a second spring, and a cleaning brush is fixedly mounted on the bottom surface of the mounting plate.

[0020] By adopting the above technical solution, by rotating the rotating shaft inside the mounting sleeve, the rotating shaft will drive the first mounting bracket and the second mounting bracket to rotate. At this time, the cleaning brushes at the bottom of the multiple mounting plates will clean the dust attached to the surface of the first filter plate, and make it fall into the interior of the combustion furnace through the mesh holes on the surface of the second filter plate, so as to facilitate the filtering of dust and impurities in the hot air and facilitate their cleaning.

[0021] Preferably, the combustion heating assembly comprises: a combustion furnace fixedly installed on the inner bottom surface of the furnace body, the top surface of the combustion furnace is fixedly installed with the bottom surface of the secondary combustion chamber, the heat conduction plate, the first partition plate and the second partition plate respectively, the outer circular wall surface of the furnace body is fixedly installed with a hopper, the hopper is communicated with the combustion furnace, the inner circular wall surface of the combustion furnace is fixedly sleeved with a material receiving hole plate, the outer circular wall surface of the combustion furnace is fixedly installed with an air inlet pipe, the air inlet pipe penetrates to the outside of the furnace body, the inner part of the combustion furnace is rotatably connected with an auger, one end of the rotating shaft of the auger is fixedly installed with a transmission gear, the outer circular wall surface of the combustion furnace is fixedly installed with a slag discharge pipe.

[0022] By adopting the above technical scheme, the fuel is added into the hopper, then the transmission gear is driven to rotate by the external motor, then the combustion furnace is installed at the bottom of the furnace body and is connected with the combustion furnace, the auger is driven to rotate by the transmission gear, then the fuel in the hopper falls into the inside of the transmission gear and is conveyed to the surface of the material receiving hole plate by the auger, then the outlet of the external air blower is connected with the air inlet pipe and the two secondary air inlets, at this time, the staff uses the burner at the bottom of the combustion furnace to burn the fuel on the top of the material receiving hole plate, then the hot air blown by the air blower contacts the fuel on the top of the material receiving hole plate, so that the fuel is fully supported by oxygen, then the burned fuel and the air conveyed by the air blower generate hot air, so as to achieve the effect that the hot air generated by the combustion in the furnace body is convenient to use.

[0023] Preferably, the outer circular wall surface of the furnace body is fixedly installed with two positioning frames, the positions of the two positioning frames correspond to the positions of the two receiving pipes respectively, one side of the positioning frame is fixedly installed with an adjusting block, the inner circular wall surface of the adjusting block is fixedly sleeved with the receiving pipe, the inside of the adjusting block is threadedly connected with an adjusting bolt, the outer circular wall surface of the adjusting bolt is threadedly connected with a threaded connecting seat, the outer circular wall surface of the adjusting bolt is fixedly sleeved with a sealing plug, the inside of the adjusting block is rotatably connected with a sealing plate, the sealing plate is slidably connected with the threaded connecting seat, the inner circular wall surface of the adjusting block is fixedly sleeved with a limiting ring, the inner circular wall surface of the adjusting block is fixedly installed with a positioning seat, the inside of the positioning seat is slidably connected with a connecting column, the outer circular wall surface of the connecting column is movably sleeved with a third spring, one end of the connecting column is rotatably connected with a connecting rod, one end of the connecting rod is rotatably connected with the sealing plate, the bottom surface of the adjusting block is provided with a circular through hole, the inner circular wall surface of the circular through hole is movably sleeved with the threaded connecting seat, one side of the adjusting block is fixedly installed with a flange joint.

[0024] By adopting the above technical solution, the adjusting bolts on the top of the two adjusting blocks are rotated, and the rotating adjusting bolts will drive the threaded connection seat and the sealing plug to move under the action of the thread, and then the moving sealing plug will move out from the inside of the circular through hole at the bottom of the adjusting block, and the threaded connection seat will drive the sealing plate to rotate to seal the circular opening inside the adjusting block, and at the same time, the residual moisture inside the first heat recovery box and multiple second heat recovery boxes will be discharged through the circular through holes at the bottom of the two adjusting blocks, so as to facilitate the sealing of the external water source and water tank when the furnace body is in use, and at the same time facilitate the evaporation and discharge of the residual moisture inside the multiple first heat recovery boxes and multiple second heat recovery boxes.

[0025] Preferably, a control hole is opened on the outer circular wall surface of the air outlet pipe, an airflow control plug-in plate is movably sleeved inside the control hole, and the airflow control plug-in plate is rotatably connected to the air outlet pipe.

[0026] By adopting the above technical solution, the air output of the air outlet duct can be adjusted by rotating the air flow control plug plate inside the air outlet duct.

[0027] Preferably, the outer circular wall surface of the secondary combustion chamber and the outer circular wall surface of the first partition are fixedly installed with a plurality of mounting seats, a guide rod is fixedly installed inside the mounting seat, the outer circular wall surface of the guide rod is movably sleeved with a first spring, the inner circular wall surface of the mounting seat is slidably connected to a limit seat, the limit seat is slidably connected to the guide rod, and the inner circular wall surface of the limit seat is movably sleeved with the connecting pipe and the water inlet pipe respectively.

[0028] By adopting the above technical solution, when the adjustment component is used, the connecting pipe and the water inlet pipe can be limited by the cooperation of the multiple first springs and the limiting seats.

[0029] In summary, the present invention mainly has the following beneficial effects:

[0030] 1. The present invention achieves the function of guiding the airflow inside the furnace body through the mutual use of the furnace body, the inspection hole, the inspection cover, the air outlet pipe, the secondary air inlet, the secondary combustion chamber, the heat conduction plate, the first partition and the second partition, so as to facilitate the noise reduction of the hot air generated by the combustion when the furnace body is in use, and at the same time achieves the effect of heat exchange for the furnace body after use, so as to facilitate the recovery of waste heat.

[0031] 2. The present invention achieves the function of absorbing the noise generated by the contact between the airflow and the adjustment plate by using the adjustment plate, the secondary combustion chamber, the second partition, the fixed seat and the first heat recovery box in coordination with each other, thereby achieving the effect of facilitating the noise reduction treatment of the flowing hot air.

[0032] 3. The present invention achieves the function of hot and cold exchange of waste heat inside the furnace body through the mutual use of the first heat recovery box, the secondary combustion chamber, the first partition, the second heat recovery box, the water inlet pipe, the heat conduction plate, the connecting pipe, the drain pipe, the receiving pipe, the receiving frame and the first adjusting hole, thereby facilitating the waste heat recovery.

[0033] 4. The present invention achieves the function of adjusting the use angles of multiple adjustment plates by using the first connecting frame, the first heat recovery box, the second heat recovery box, the second connecting frame, the second partition, the second adjustment hole, the adjustment screw and the scale ring in coordination with each other, thereby making it easy to adapt to the effect of hot air with different flow rates.

[0034] 5. The present invention achieves the function of filtering dust and impurities in hot air and the effect of facilitating cleaning of the first filter plate and the second filter plate by using the secondary combustion chamber, the mounting sleeve, the first filter plate, the second filter plate, the rotating shaft, the first mounting bracket, the second mounting bracket, the mounting plate, the positioning column, the second spring and the cleaning brush in coordination with each other.

[0035] 6. The present invention achieves the effect of facilitating the use of hot air generated by combustion inside the furnace body through the coordinated use of the furnace body, combustion furnace, secondary combustion chamber, heat conduction plate, first partition, second partition, air intake pipe, auger, transmission gear and slag discharge pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0037] Figure 2 It is a schematic diagram of the furnace structure of the present invention;

[0038] Figure 3 It is a schematic diagram of the hopper structure of the present invention;

[0039] Figure 4 It is a schematic structural diagram of the combustion furnace of the present invention;

[0040] Figure 5 is a schematic structural diagram of the second baffle of the present invention;

[0041] Figure 6 is a schematic structural diagram of the first baffle of the present invention;

[0042] Figure 7 It is a schematic structural diagram of the adjustment plate of the present invention;

[0043] Figure 8 yes Figure 7 A schematic diagram of the partially enlarged structure of the middle part;

[0044] Figure 9 It is a schematic structural diagram of the secondary combustion chamber of the present invention;

[0045] Figure 10 It is a schematic diagram of the installation sleeve structure of the present invention;

[0046] Figure 11 It is a schematic diagram of the mounting base structure of the present invention;

[0047] Figure 12 It is a schematic structural diagram of the regulating block of the present invention;

[0048] Figure 13 Schematic diagram of the limiting ring structure of the present invention;

[0049] Figure 14 yes Figure 12 A schematic diagram of the partially enlarged structure of B in the middle;

[0050] Figure 15 yes Figure 3 Schematic diagram of the partially enlarged structure of C in the middle;

[0051] Figure 16 yes Figure 10 A schematic diagram of the partially enlarged structure of D in the middle;

[0052] Figure 17 It is a schematic diagram of the overall cross-sectional structure of the present invention.

[0053] Figures: 1, furnace body; 2, inspection cover; 3, hopper; 4, air inlet pipe; 5, transmission gear; 6, adjustment block; 7, inspection hole; 8, combustion furnace; 9, secondary air inlet hole; 10, second partition plate; 11, first partition plate; 12, heat conducting plate; 13, mounting sleeve; 14, adjustment plate; 15, slag discharge pipe; 16, air outlet pipe; 17, secondary combustion chamber; 18, receiving pipe; 19, connecting pipe; 20, mounting base; 21, second adjustment hole; 22, first adjustment hole; 23, first heat recovery box; 24, second heat recovery box; 25, exhaust hole; 26, water inlet pipe; 27, first connecting frame; 28, second connecting frame; 29, adjustment screw; 30, fixing base; 31. Drain pipe; 32. Receiver; 33. Guide rod; 34. First spring; 35. Limit seat; 36. Rotating shaft; 37. First mounting frame; 38. First filter plate; 39. Second filter plate; 40. Second mounting frame; 41. Material receiving hole plate; 42. Auger; 43. Positioning frame; 44. Adjusting bolt; 45. Threaded connection seat; 46. Sealing plug; 47. Sealing plate; 48. Limiting ring; 49. Flange joint; 50. Control hole; 51. Airflow control plug plate; 52. Scale ring; 53. Positioning column; 54. Second spring; 55. Mounting plate; 56. Cleaning brush; 57. Positioning seat; 58. Connecting column; 59. Connecting rod; 60. Third spring. DETAILED DESCRIPTION

[0054] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0055] Example: Reference Figure 1 、 Figure 2 、 Figure 3 and Figure 4 , a low-noise and high-efficiency hot air furnace with heat recovery and noise reduction functions, comprising: a furnace body 1, an inspection hole 7 is opened on the top surface of the furnace body 1, an inspection cover 2 is fixedly installed on the top surface of the furnace body 1, an air outlet pipe 16 is fixedly installed on one side of the furnace body 1, and two secondary air inlet holes 9 are opened on one side of the furnace body 1; a combustion heating component is fixedly installed on the bottom surface of the interior of the furnace body 1, and is used to heat the air to generate hot air, and cooperate with the air outlet pipe 16 to discharge the hot air for use; the combustion heating component comprises: a combustion furnace 8, a combustion furnace 9, a combustion furnace 10, a combustion furnace 11, a combustion furnace 12, a combustion furnace 13, a combustion furnace 14, a combustion furnace 15, a combustion furnace 16, a combustion furnace 17, a combustion furnace 18, a combustion furnace 19, a combustion furnace 20, a combustion furnace 21, a combustion furnace 22, a combustion furnace 23, a combustion furnace 24, a combustion furnace 25, a combustion furnace 26, a combustion furnace 27, a combustion furnace 28, a combustion furnace 29, a combustion furnace 30, a combustion furnace 31, a combustion furnace 32, a combustion furnace 33, a combustion furnace 34, a combustion furnace 35 The combustion furnace 8 is fixedly mounted on the inner bottom surface of the furnace body 1, and the top surface of the combustion furnace 8 is fixedly mounted on the bottom surfaces of the secondary combustion chamber 17, the heat conducting plate 12, the first baffle 11 and the second baffle 10 respectively. The outer circular wall surface of the furnace body 1 is fixedly mounted with a hopper 3, and the hopper 3 is connected to the combustion furnace 8. The inner circular wall surface of the combustion furnace 8 is fixedly sleeved with a material receiving hole plate 41. The outer circular wall surface of the combustion furnace 8 is fixedly mounted with an air inlet pipe 4, and the air inlet pipe 4 passes through the outside of the furnace body 1. The interior of the combustion furnace 8 is rotatably connected with an auger 42, and the auger The auger 42 is driven by a gear 5 to rotate, and the fuel in the hopper 3 falls into the transmission gear 5 and is transported to the surface of the receiving orifice plate 41 through the auger 42 for accumulation. Then the staff connects the air outlet of the external fan with the air inlet pipe 4 and the two secondary air inlet holes 9. At this time, the staff uses the burner at the bottom of the combustion furnace 8 to burn the fuel on the top of the receiving orifice plate 41, and then the hot air blown in by the fan will contact the fuel on the top of the receiving orifice plate 41, so that its combustion is fully supported by oxygen, and then the burned fuel and the air transported by the fan will produce hot air, thereby achieving the effect of facilitating the combustion inside the furnace body 1 to generate hot air for use.

[0056] refer to Figure 5 、 Figure 6 、 Figure 7 and Figure 8A secondary combustion chamber 17 is provided inside the furnace body 1, and a heat conducting plate 12 is provided on the outer circular wall of the secondary combustion chamber 17. A first partition 11 is provided on the outer circular wall of the heat conducting plate 12, and a second partition 10 is provided on the outer circular wall of the first partition 11. Various partition spaces are formed inside the furnace body 1 by the heat conducting plate 12, the first partition 11 and the second partition 10 to form an air duct. The outer circular walls of the heat conducting plate 12, the first partition 11 and the second partition 10 are all provided with exhaust holes 25; the outer circular walls of the secondary combustion chamber 17 and the second partition 10 are both provided with noise reduction components, and are used to reduce the noise of the hot air flow when hot air is generated inside the furnace body 1; the noise reduction components include: a plurality of adjustment plates 14, and the plurality of adjustment plates 14 are respectively provided in the secondary combustion chamber 1 7 and the outer circular wall of the second partition 10, the outer circular wall of the secondary combustion chamber 17 and the outer circular wall of the second partition 10 are fixedly installed with a plurality of fixing seats 30, the adjustment plate 14 is rotatably connected to the fixing seat 30, and the outer circular wall of the secondary combustion chamber 17 is slidably connected with a plurality of first heat recovery boxes 23, the adjustment plate 14 is a spiral arc, its side is at a forty-five-degree angle, and the surface is coated with a sound-absorbing and high-temperature resistant silicate acid paint. When the airflow passes through the surface of the adjustment plate 14, since the adjustment plate 14 is a spiral arc and has a forty-five-degree angle side, and the surface is coated with a sound-absorbing and high-temperature resistant silicate acid paint, the flow direction of the airflow will be guided by the adjustment plate 14, reducing the impact noise generated by the contact between the airflow and the secondary combustion chamber 17 and the surface of the heat conducting plate 12. At the same time, due to the adjustment plate The high-temperature silicate acid coating on the surface of 14 is a closed micropore and mesh fiber structure, which will absorb the noise generated by the contact between the airflow and the adjustment plate 14, thereby achieving the effect of reducing the noise of the flowing hot air. The outer circular wall of the secondary combustion chamber 17 and the first partition 11 are both provided with a waste heat recovery component, and are used to recover part of the waste heat inside the furnace body 1 after the hot air inside the furnace body 1 is used up; the waste heat recovery component includes: a number of first heat recovery boxes 23, a number of first heat recovery boxes 23 are all slidably connected to the outer circular wall of the secondary combustion chamber 17, the outer circular wall of the first partition 11 is slidably connected to a number of second heat recovery boxes 24, the outer circular wall of the secondary combustion chamber 17 is provided with a water inlet pipe 26, and the water inlet pipe 26 passes through the first partition 1 1 and the heat conducting plate 12 are fixedly sleeved with the inner circular walls of the plurality of first heat recovery boxes 23. The outer circular wall of the first partition plate 11 is provided with a connecting pipe 19, which is fixedly sleeved with the inner circular walls of the plurality of second heat recovery boxes 24. A drainage pipe 31 is provided between the first partition plate 11 and the secondary combustion chamber 17. The drainage pipe 31 is fixedly sleeved with the inner circular walls of the first heat recovery box 23 and the second heat recovery box 24 respectively. The drainage pipe 31 passes through the heat conducting plate 12. The inner circular wall of the drainage pipe 31 and the inner circular wall of the water inlet pipe 26 are fixedly sleeved with a receiving pipe 18. The receiving pipe 18 passes through the first partition plate 11, the second partition plate 10 and the heat conducting plate 12, and extends to the outside of the furnace body 1. The outer circular walls of the plurality of first heat recovery boxes 23 are fixedly installed with a receiving frame 32.The outer circular wall surface of the heat conducting plate 12 is provided with a plurality of first adjusting holes 22, and the first adjusting holes 22 are movably connected to the receiving frame 32. Both sides of the receiving frame 32 are rotatably connected to the adjusting plate 14, and are connected to the air outlet pipe 16 through an external pipe, so that the hot air inside the furnace body 1 can be led out for use, and at the same time, the air flow control plug 51 inside the air outlet pipe 16 can be rotated to adjust the air volume of the air outlet pipe 16. When the hot air inside the furnace body 1 is exhausted, the staff rotates the two adjusting bolts 44 in the opposite direction, and the circular opening inside the adjusting block 6 will be opened. At the same time, the adjusting bolt 44 drives the sealing plug 46 to re-enter the interior of the circular through hole to seal it, and then the staff connects the external water source and the external heat recovery water tank to the two flange joints 4 respectively. 9 for docking installation, at this time, the external water source can be transported to the interior of the multiple second heat recovery boxes 24 through the flange joint 49 and the water inlet pipe 26, and then after the water inside the second heat recovery box 24 is filled, the water flow will enter the interior of the multiple first heat recovery boxes 23 through the drain pipe 31, and then the residual heat inside the furnace body 1 can be taken away by the cold water inside the multiple first heat recovery boxes 23 and the multiple second heat recovery boxes 24, thereby achieving the effect of recovering the waste heat inside the furnace body 1. The interior of the furnace body 1 is provided with an adjustment component, and is used to adjust the use of the noise reduction component through the waste heat recovery component, so that it is convenient to reduce the noise of hot air with different flow rates. The adjustment component includes: a plurality of first connecting frames 27, a plurality of first connecting frames 27 are divided into The outer circular walls of the plurality of first heat recovery boxes 23 are fixedly mounted, and the outer circular walls of the plurality of second heat recovery boxes 24 are fixedly mounted with second connecting frames 28. The positions of the plurality of first connecting frames 27 correspond to the positions of the plurality of second connecting frames 28. One end of the first connecting frame 27 is fixedly mounted with the second heat recovery box 24. The outer circular walls of the second partition 10 and the first partition 11 are provided with a plurality of second adjustment holes 21. The plurality of first connecting frames 27 and the plurality of second connecting frames 28 are movably connected with the plurality of second adjustment holes 21. The interior of the furnace body 1 is rotatably connected with an adjusting screw 29, which is threadedly connected to the plurality of second connecting frames 28. The top surface of the furnace body 1 is fixedly mounted with a scale ring 52. The scale ring 52 The position of corresponds to the adjusting screw 29, and the two sides of the second connecting frame 28 are rotatably connected to the adjusting plate 14 respectively. When the air intake speed of the external fan changes, the staff can rotate the adjusting screw 29, and then under the threaded transmission action of the adjusting screw 29, the multiple second connecting frames 28 will drive the multiple second heat recovery boxes 24 to move up and down at the same time, and then under the connection action of the multiple first connecting frames 27, the multiple first heat recovery boxes 23 will move up and down together, and then the multiple supporting frames 32 outside the first heat recovery box 23 will move and drive the multiple adjusting plates 14 outside the secondary combustion chamber 17 to rotate. At the same time, the up and down movement of the multiple second connecting frames 28 will drive the multiple adjusting plates 14 outside the second partition 10 to rotate.The use angles of the multiple adjustment plates 14 can then be adjusted to achieve the effect of being suitable for hot air with different flow rates.

[0057] refer to Figure 6 、 Figure 10 、 Figure 11 、 Figure 12 、 Figure 13 and Figure 14 The outer circular wall of the furnace body 1 is fixedly installed with two positioning frames 43. The positions of the two positioning frames 43 correspond to the positions of the two receiving tubes 18 respectively. An adjusting block 6 is fixedly installed on one side of the positioning frame 43. The inner circular wall of the adjusting block 6 is fixedly sleeved with the receiving tube 18. The internal thread of the adjusting block 6 is connected with an adjusting bolt 44. The outer circular wall of the adjusting bolt 44 is threadedly connected with a threaded connection seat 45. The outer circular wall of the adjusting bolt 44 is fixedly sleeved with a sealing plug 46. The internal rotation of the adjusting block 6 is connected with a sealing plate 47. The sealing plate 47 is slidably connected to the threaded connection seat 45. The inner circular wall of the adjusting block 6 is fixedly sleeved. The limiting ring 48 is connected, and a positioning seat 57 is fixedly installed on the inner wall surface of the adjusting block 6. The interior of the positioning seat 57 is slidably connected to a connecting column 58. The outer wall surface of the connecting column 58 is movably sleeved with a third spring 60. One end of the connecting column 58 is rotatably connected to a connecting rod 59. One end of the connecting rod 59 is rotatably connected to the blocking plate 47. A circular through hole is provided on the bottom surface of the adjusting block 6. The inner wall surface of the circular through hole is movably sleeved with the threaded connecting seat 45 adjusting block 6. A flange joint 49 is fixedly installed on one side of the adjusting block 6. By rotating the adjusting bolts 44 on the top of the two adjusting blocks 6, the rotating adjusting bolts 44 will be rotated. The threaded connection seat 45 and the sealing plug 46 are driven to move under the action of the thread, and then the moving sealing plug 46 will move out from the inside of the circular through hole at the bottom of the adjusting block 6, and the threaded connection seat 45 will drive the sealing plate 47 to rotate to seal the circular opening inside the adjusting block 6, and at the same time, the first heat recovery box 23 and the plurality of second heat recovery boxes 24 are discharged through the circular through holes at the bottom of the two adjusting blocks 6, so as to facilitate the sealing of the external water source and water tank when the furnace body 1 is in use, and at the same time facilitate the removal of the residual water inside the plurality of first heat recovery boxes 23 and the plurality of second heat recovery boxes 24. In order to achieve the effect of evaporation and discharge, the outer circular wall of the secondary combustion chamber 17 and the outer circular wall of the first partition 11 are fixedly installed with a number of mounting seats 20, the interior of the mounting seat 20 is fixedly installed with a guide rod 33, the outer circular wall of the guide rod 33 is movably sleeved with a first spring 34, the interior of the mounting seat 20 is slidably connected to a limiting seat 35, the limiting seat 35 is slidably connected to the guide rod 33, and the inner circular wall of the limiting seat 35 is movably sleeved with the connecting pipe 19 and the water inlet pipe 26 respectively, so that when using the adjustment component, the connecting pipe 19 and the water inlet pipe 26 can be limited by the cooperation of multiple first springs 34 and the limiting seat 35.

[0058] refer to Figure 3 、Figure 4 、 Figure 6 、 Figure 9 、 Figure 15 、 Figure 16 and Figure 17, the top surface of the secondary combustion chamber 17 is fixedly installed with a mounting sleeve 13, the interior of the mounting sleeve 13 is fixedly sleeved with a first filter plate 38, the inner circular wall of the mounting sleeve 13 is threadedly connected with a second filter plate 39, the interior of the first filter plate 38 is rotatably connected with a rotating shaft 36, the outer circular wall of the rotating shaft 36 is fixedly sleeved with a first mounting bracket 37, the bottom surface of the rotating shaft 36 is fixedly installed with a second mounting bracket 40, the bottom surface of the first mounting bracket 37 and the top surface of the second mounting bracket 40 are respectively provided with two mounting plates 55, the interiors of the first mounting bracket 37 and the second mounting bracket 40 are slidably connected with a plurality of positioning columns 53, one end of the positioning column 53 is fixedly installed with the mounting plate 55, the outer circular wall of the positioning column 53 is movably sleeved with a second spring 54, and the bottom surface of the mounting plate 55 is fixedly installed with a cleaning The cleaning brush 56 rotates the rotating shaft 36 inside the mounting sleeve 13, and then the rotating shaft 36 will drive the first mounting bracket 37 and the second mounting bracket 40 to rotate. At this time, the cleaning brush 56 at the bottom of the multiple mounting plates 55 will clean the dust attached to the surface of the first filter plate 38, and make it fall into the interior of the combustion furnace 8 through the mesh holes on the surface of the second filter plate 39, so as to facilitate the filtering of dust and impurities in the hot air and the cleaning effect. The outer circular wall of the air outlet pipe 16 is provided with a control hole 50, and the inner movable sleeve of the control hole 50 is connected with an air flow control plug-in plate 51, which is rotatably connected to the air outlet pipe 16. The air flow control plug-in plate 51 inside the air outlet pipe 16 can be used to adjust the air flow of the air outlet pipe 16, and the combustion is heated. The thermal component includes: a combustion furnace 8, which is fixedly mounted on the inner bottom surface of the furnace body 1, and the top surface of the combustion furnace 8 is fixedly mounted on the bottom surfaces of the secondary combustion chamber 17, the heat conducting plate 12, the first partition 11 and the second partition 10 respectively. A hopper 3 is fixedly mounted on the outer circumferential wall of the furnace body 1, and the hopper 3 is connected to the combustion furnace 8. A material receiving hole plate 41 is fixedly sleeved on the inner circumferential wall of the combustion furnace 8. An air inlet pipe 4 is fixedly mounted on the outer circumferential wall of the combustion furnace 8, and the air inlet pipe 4 passes through the outside of the furnace body 1. An auger 42 is connected to the inside of the combustion furnace 8, and a transmission gear 5 is fixedly mounted on one end of the rotating shaft of the auger 42. A slag discharge pipe 15 is fixedly mounted on the outer circumferential wall of the combustion furnace 8. By adding fuel to the inside of the hopper 3, the transmission gear 5 is driven to rotate by an external motor. Then, a burner is installed at the bottom of the furnace body 1 and connected to the combustion furnace 8. The transmission gear 5 is used to drive the auger 42 to rotate, and the fuel inside the hopper 3 will fall into the inside of the transmission gear 5 and be transported to the surface of the receiving orifice plate 41 through the auger 42 for accumulation. Then the staff connects the air outlet of the external fan with the air inlet pipe 4 and the two secondary air inlet holes 9. At this time, the staff uses the burner at the bottom of the combustion furnace 8 to burn the fuel on the top of the receiving orifice plate 41, and then the hot air blown in by the fan will contact the fuel on the top of the receiving orifice plate 41, so that its combustion is fully supported by oxygen, and then the burning fuel and the air transported by the fan will produce hot air, thereby achieving the effect of facilitating the combustion inside the furnace body 1 to generate hot air for use.

[0059] Working principle: Please refer to Figure 1 、 Figure 2 、 Figure 4 、 Figure 12 、 Figure 13 and Figure 14 As shown, when in use, the staff adds fuel to the inside of the hopper 3, and then drives the transmission gear 5 to rotate through the external motor, and then installs the burner at the bottom of the furnace body 1 and docks it with the combustion furnace 8. At this time, the staff rotates the adjusting bolts 44 on the top of the two adjusting blocks 6, and then the rotating adjusting bolts 44 will drive the threaded connection seat 45 and the sealing plug 46 to move under the action of the thread, and then the moving sealing plug 46 will move out from the inside of the circular through hole at the bottom of the adjusting block 6, and the threaded connection seat 45 will drive the sealing plate 47 to rotate to seal the circular opening inside the adjusting block 6, thereby completing the preliminary preparation work;

[0060] Please refer to Figure 2 、 Figure 3 、 Figure 4 and Figure 10 After the above steps are completed, the staff drives the auger 42 to rotate by the transmission gear 5, and the fuel inside the hopper 3 will fall into the inside of the transmission gear 5 and be transported to the surface of the receiving orifice plate 41 through the auger 42 for accumulation. Then the staff connects the air outlet of the external fan with the air inlet pipe 4 and the two secondary air inlet holes 9. At this time, the staff uses the burner at the bottom of the combustion furnace 8 to burn the fuel on the top of the receiving orifice plate 41, and then the hot air blown in by the fan will contact the fuel on the top of the receiving orifice plate 41, so that its combustion is fully supported by oxygen, and then the burned fuel and the air transported by the fan will produce hot air, which will enter the interior of the secondary combustion chamber 17. At this time, the unburned fuel inside the hot air will be supplemented in the interior of the secondary combustion chamber 17 to achieve the effect of complete and sufficient combustion of the fuel, and then the hot air inside the secondary combustion chamber 17 will enter between the secondary combustion chamber 17 and the heat conduction plate 12 through the exhaust hole 25. In this process, the first filter plate 38 and the second filter plate 39 inside the installation sleeve 13 can filter dust and impurities in the hot air;

[0061] Please refer to Figure 5 、 Figure 6 、 Figure 7 and Figure 9At this time, due to the continuous delivery of wind by the fan, airflow is generated between the heat conducting plate 12 and the secondary combustion chamber 17. At this time, under the action of multiple adjustment plates 14 between the secondary combustion chamber 17 and the heat conducting plate 12, when the airflow passes through the surface of the adjustment plate 14, since the adjustment plate 14 is a spiral arc with a side surface at a forty-five degree angle, and the surface is coated with a sound-absorbing and high-temperature resistant silicate acid coating, the flow direction of the airflow will be guided by the adjustment plate 14, reducing the impact noise generated by the contact between the airflow and the secondary combustion chamber 17 and the surface of the heat conducting plate 12. At the same time, since the high-temperature silicate acid coating on the surface of the adjustment plate 14 has closed micropores and a mesh fiber structure, it will absorb the noise generated by the contact between the airflow and the adjustment plate 14, thereby reducing the noise of the flowing hot air;

[0062] Please refer to Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 and Figure 11 After the above steps are completed, the hot air flow will enter between the first partition 11 and the second partition 10 through the exhaust hole 25, and continue to enter between the second partition 10 and the furnace body 1, and then the multiple second partitions 10 outside the second partition 10 will continue to reduce the noise of the hot air flow through the above principle. When the air intake speed of the external fan changes, the staff can rotate the adjusting screw 29, and then under the threaded transmission action of the adjusting screw 29, the multiple second connecting frames 28 will drive the multiple second heat recovery boxes 24 to move up and down at the same time, and then under the connection action of the multiple first connecting frames 27, the multiple first heat recovery boxes 23 will move up and down together, and then the multiple supporting frames 32 outside the first heat recovery box 23 will move and bring The multiple adjustment plates 14 outside the secondary combustion chamber 17 are rotated, and the multiple second connecting frames 28 move up and down, which drives the multiple adjustment plates 14 outside the second partition 10 to rotate, and then the use angles of the multiple adjustment plates 14 can be adjusted, so as to make it suitable for hot air with different flow rates. When the internal combustion of the secondary combustion chamber 17 generates hot air, the heat inside the furnace body 1 will heat and evaporate the water remaining in the multiple second heat recovery boxes 24 and the multiple first heat recovery boxes 23, and then the high-temperature and high-pressure water vapor will be discharged through the circular through holes at the bottom of the two adjustment blocks 6, thereby facilitating the evaporation and discharge of the residual water in the multiple first heat recovery boxes 23 and the multiple second heat recovery boxes 24.

[0063] Please refer to Figure 3 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 9 and Figure 15When the hot air inside the furnace body 1 needs to be used, the staff can connect the external pipe to the air outlet pipe 16, and then the hot air inside the furnace body 1 can be discharged for use. At the same time, the air flow control plug 51 inside the air outlet pipe 16 can be used to adjust the air volume of the air outlet pipe 16. When the hot air inside the furnace body 1 is exhausted, the staff rotates the two adjusting bolts 44 in the opposite direction, and the circular opening inside the adjusting block 6 will be opened. At the same time, the adjusting bolt 44 drives the sealing plug 46 to re-enter the interior of the circular through hole to seal it, and then work The personnel connect and install the external water source and the external heat recovery water tank to the two flange joints 49 respectively. At this time, the external water source can be transported to the interior of the multiple second heat recovery tanks 24 through the flange joints 49 and the water inlet pipe 26. After the water inside the second heat recovery tanks 24 is filled, the water will flow into the interior of the multiple first heat recovery tanks 23 through the drain pipe 31. Then, the cold water inside the multiple first heat recovery tanks 23 and the multiple second heat recovery tanks 24 can take away the residual heat inside the furnace body 1, thereby achieving the effect of recovering the waste heat inside the furnace body 1.

[0064] Please refer to Figure 4 、 Figure 5 、 Figure 10 and Figure 16 After the above steps are completed, the staff can open the inspection cover 2 on the top of the furnace body 1, and then the staff can rotate the rotating shaft 36 inside the mounting sleeve 13, and then the rotating shaft 36 will drive the first mounting bracket 37 and the second mounting bracket 40 to rotate. At this time, the cleaning brush 56 at the bottom of the multiple mounting plates 55 will clean the dust attached to the surface of the first filter plate 38, and make it fall into the interior of the combustion furnace 8 through the mesh holes on the surface of the second filter plate 39. Then the staff can clean the dust and combustion waste residue inside the combustion furnace 8 by opening the slag discharge pipe 15, thereby achieving the effect of reducing the noise of the hot air generated by combustion when the furnace body 1 is in use, and at the same time facilitating the recovery of waste heat.

[0065] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A low-noise and high-efficiency hot air furnace with heat recovery and noise reduction functions, characterized in that: include; A furnace body, wherein the top surface of the furnace body is provided with an inspection hole, the top surface of the furnace body is fixedly provided with an inspection cover, an air outlet pipe is fixedly provided on one side of the furnace body, and two secondary air inlet holes are provided on one side of the furnace body; The combustion and heating components are fixedly installed on the inner bottom surface of the furnace body, and are used to heat the air to generate hot air, and cooperate with the air outlet pipe to discharge the hot air for use; A secondary combustion chamber is provided inside the furnace body, a heat conducting plate is provided on the outer circumferential wall of the secondary combustion chamber, a first partition is provided on the outer circumferential wall of the heat conducting plate, a second partition is provided on the outer circumferential wall of the first partition, various partition spaces are formed inside the furnace body by the heat conducting plate, the first partition and the second partition to form an air duct, and exhaust holes are provided on the outer circumferential walls of the heat conducting plate, the first partition and the second partition; The outer circular wall surfaces of the secondary combustion chamber and the second partition are both provided with noise reduction components, and are used to reduce the noise of the hot air flow when hot air is generated inside the furnace body. The noise reduction components include: a plurality of adjustment plates, which are respectively arranged on the outer circular walls of the secondary combustion chamber and the second partition. The outer circular wall surfaces of the secondary combustion chamber and the second partition are both fixedly mounted with a plurality of fixing seats, the adjustment plates are rotatably connected to the fixing seats, and the outer circular wall surface of the secondary combustion chamber is slidably connected to a plurality of first heat recovery boxes. The adjustment plates are spirally arc-shaped, with their sides at a forty-five-degree angle, and the surface is coated with a sound-absorbing and high-temperature resistant silica hydrochloric acid paint. The outer circular wall of the secondary combustion chamber and the first partition are both provided with waste heat recovery components, and are used to recover part of the waste heat inside the furnace body after the hot air inside the furnace body is used up. The waste heat recovery components include: a plurality of first heat recovery boxes, each of which is slidably connected to the outer circular wall of the secondary combustion chamber, and a plurality of second heat recovery boxes slidably connected to the outer circular wall of the first partition; An adjustment component is provided inside the furnace body, and is used to adjust the use of the noise reduction component in conjunction with the waste heat recovery component, making it convenient to perform noise reduction on hot air with different flow rates.

2. The low-noise, high-efficiency hot air furnace with heat recovery and noise reduction functions according to claim 1, characterized in that: A water inlet pipe is provided on the outer circular wall of the secondary combustion chamber, and the water inlet pipe passes through the first partition and the heat conduction plate and is fixedly connected with the inner circular walls of several first heat recovery boxes. A connecting pipe is provided on the outer circular wall of the first partition, and the connecting pipe is fixedly connected with the inner circular walls of several second heat recovery boxes. A drain pipe is provided between the first partition and the secondary combustion chamber, and the drain pipe is fixedly connected with the inner circular walls of the first heat recovery box and the second heat recovery box respectively. The drain pipe passes through the heat conduction plate, and the inner circular wall of the drain pipe and the inner circular wall of the water inlet pipe are both fixedly connected with a socket pipe, which passes through the first partition, the second partition and the heat conduction plate, and extends to the outside of the furnace body. The outer circular walls of several first heat recovery boxes are fixedly installed with a socket frame, and the outer circular wall of the heat conduction plate is provided with several first adjustment holes, which are movably connected with the socket frame, and both sides of the socket frame are rotatably connected with the adjustment plate.

3. The low-noise and high-efficiency hot air stove with heat recovery and noise reduction functions according to claim 1 is characterized in that: The adjustment assembly includes: a plurality of first connecting frames, which are respectively fixedly mounted on the outer circular walls of the plurality of first heat recovery boxes, and a plurality of second connecting frames are fixedly mounted on the outer circular walls of the plurality of second heat recovery boxes. The positions of the plurality of first connecting frames correspond to the positions of the plurality of second connecting frames, and one end of the first connecting frame is fixedly mounted on the second heat recovery box. The outer circular walls of the second partition plate and the first partition plate are each provided with a plurality of second adjustment holes. The plurality of first connecting frames and the plurality of second connecting frames are respectively movably connected to the plurality of second adjustment holes. An adjusting screw is rotatably connected to the interior of the furnace body, and the adjusting screw is respectively threadedly connected to the plurality of second connecting frames. A scale ring is fixedly mounted on the top surface of the furnace body, and the position of the scale ring corresponds to the adjusting screw. Both sides of the second connecting frame are rotatably connected to the adjustment plate.

4. The low-noise, high-efficiency hot air furnace with heat recovery and noise reduction functions according to claim 2, characterized in that: The outer circular wall of the furnace body is fixedly installed with two positioning brackets, and the positions of the two positioning brackets correspond to the positions of the two receiving tubes respectively. An adjusting block is fixedly installed on one side of the positioning bracket, and the inner circular wall surface of the adjusting block is fixedly sleeved with the receiving tube. The internal thread of the adjusting block is connected with an adjusting bolt, and the outer circular wall surface of the adjusting bolt is threadedly connected with a threaded connecting seat. The outer circular wall surface of the adjusting bolt is fixedly sleeved with a sealing plug, and the internal rotation of the adjusting block is connected with a sealing plate, which is slidably connected to the threaded connecting seat. The inner circular wall surface of the adjusting block is fixedly sleeved with a limiting ring, and the inner circular wall surface of the adjusting block is fixedly installed with a positioning seat, and the internal sliding connection of the positioning seat is connected with a connecting column, and the outer circular wall surface of the connecting column is movably sleeved with a third spring. One end of the connecting column is rotatably connected with a connecting rod, and one end of the connecting rod is rotatably connected to the sealing plate. A circular through hole is provided on the bottom surface of the adjusting block, and the inner circular wall surface of the circular through hole is movably sleeved with the threaded connecting seat adjusting block, and a flange joint is fixedly installed on one side of the adjusting block.

5. The low-noise, high-efficiency hot air furnace with heat recovery and noise reduction functions according to claim 1, characterized in that: The outer circular wall surface of the secondary combustion chamber and the outer circular wall surface of the first partition are fixedly installed with a plurality of mounting seats, the interior of the mounting seat is fixedly installed with a guide rod, the outer circular wall surface of the guide rod is movably sleeved with a first spring, the interior of the mounting seat is slidably connected to a limit seat, the limit seat is slidably connected to the guide rod, and the inner circular wall surface of the limit seat is movably sleeved with the connecting pipe and the water inlet pipe respectively.

6. The low-noise, high-efficiency hot air furnace with heat recovery and noise reduction functions according to claim 1, characterized in that: The top surface of the secondary combustion chamber is fixedly installed with a mounting sleeve, the interior of the mounting sleeve is fixedly sleeved with a first filter plate, the inner circular wall of the mounting sleeve is threadedly connected to the second filter plate, the interior of the first filter plate is rotatably connected with a rotating shaft, the outer circular wall of the rotating shaft is fixedly sleeved with a first mounting bracket, the bottom surface of the rotating shaft is fixedly installed with a second mounting bracket, and two mounting plates are respectively provided on the bottom surface of the first mounting bracket and the top surface of the second mounting bracket. Several positioning columns are slidably connected to the interior of the first mounting bracket and the second mounting bracket, one end of the positioning column is fixedly installed with the mounting plate, the outer circular wall of the positioning column is movably sleeved with a second spring, and a cleaning brush is fixedly installed on the bottom surface of the mounting plate.

7. The low-noise and high-efficiency hot air stove with heat recovery and noise reduction functions according to claim 1 is characterized in that: The combustion heating assembly includes: a combustion furnace, which is fixedly mounted on the inner bottom surface of the furnace body, the inner bottom surface of the furnace body is fixedly mounted with the combustion furnace, the top surface of the combustion furnace is respectively fixedly mounted on the bottom surfaces of the secondary combustion chamber, the heat conduction plate, the first partition and the second partition, the outer circular wall surface of the furnace body is fixedly mounted with a hopper, the hopper is connected to the combustion furnace, the inner circular wall surface of the combustion furnace is fixedly sleeved with a material receiving hole plate, the outer circular wall surface of the combustion furnace is fixedly mounted with an air intake pipe, the air intake pipe passes through the outside of the furnace body, the internal rotation of the combustion furnace is connected to an auger, one end of the auger rotating shaft is fixedly mounted with a transmission gear, and the outer circular wall surface of the combustion furnace is fixedly mounted with a slag discharge pipe.

8. The low-noise, high-efficiency hot air furnace with heat recovery and noise reduction functions according to claim 1, characterized in that: A control hole is provided on the outer circular wall of the air outlet pipe. An air flow control plug-in plate is movably sleeved inside the control hole. The air flow control plug-in plate is rotatably connected to the air outlet pipe.

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