Premixing type gas hot blast stove

Abstract

The invention relates to the technical field of hot blast stoves, and discloses a premixing type gas hot blast stove which comprises a machining table, an automatic feeding mechanism, a flow adjusting mechanism and a waste heat recycling mechanism. Mounting frames are fixedly arranged on the top of the left side of the machining table, the automatic feeding mechanism is arranged in the mounting frames, and reinforcing ribs are fixedly arranged between the bottoms of the adjacent mounting frames. According to the premixing type fuel gas hot blast stove, stable and automatic feeding of fuel can be achieved through the automatic feeding mechanism, scalding caused by manual feeding is avoided, meanwhile, the fuel can be stirred and mixed, incomplete combustion of the fuel is avoided, and the burning efficiency is improved. The automatic feeding mechanism operates to drive the flow adjusting mechanism to conduct self-adaptive adjustment on the input air flow, so that the proportion of fuel and air is kept optimal, the combustion effect is improved, heat generated after combustion can be fully recycled through the waste heat recycling mechanism, and the utilization efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of hot blast stoves, in particular to a premixed gas hot blast stove. Background Art

[0002] The working principle of the hot air stove is that the fuel is burned through the burner to produce high-temperature combustion gas. These high-temperature combustion gases transfer heat to the heated air with the help of the hot air stove with enhanced heat exchange measures. The air to be heated is forced into the hot air stove through the optional blower, and the temperature rises to the rated value after absorbing heat, and then it is sent out from the hot air outlet. When the hot air temperature reaches the rated upper limit temperature, the burner will automatically stop burning or turn to a small flame combustion; when the hot air temperature drops to the rated lower limit temperature, the burner will re-ignite or turn to a high flame combustion. The speed of heating can be achieved by adjusting the air inlet valve. Hot air stoves are widely used in industrial production, such as for heating post-processing, separation, absorption, furnace roasting and material physical and chemical deformation processes. In addition, it can also be used for sintering or roasting of materials or post-processing, and absorbing the release of heavy metals in flue gas. In civil use, hot air stoves are also often used for heating in large places.

[0003] The existing hot blast furnace is prone to fuel accumulation during combustion, and the ratio of air to fuel cannot be guaranteed, resulting in incomplete combustion and difficulty in fully utilizing the heat after combustion. Therefore, a premixed gas hot blast furnace is proposed. Summary of the invention

[0004] The present invention aims to solve the technical problems that fuel is easily accumulated during combustion in existing hot blast furnaces, and the ratio of air to fuel cannot be guaranteed, resulting in incomplete combustion and difficulty in fully utilizing the heat after combustion, and provides a premixed gas hot blast furnace.

[0005] The technical solution adopted by the present invention to solve its technical problem is: A premixed gas hot blast furnace, comprising a processing table, an automatic feeding mechanism, a flow regulating mechanism and a waste heat recovery mechanism; A mounting frame is fixedly provided on the top left side of the processing table, the automatic feeding mechanism is arranged inside the mounting frame, reinforcing ribs are fixedly provided between the bottoms of adjacent mounting frames, the waste heat recovery mechanism is arranged on the right side of the top of the processing table, a combustion furnace is arranged between the automatic feeding mechanism and the waste heat recovery mechanism, the output end of the automatic feeding mechanism is connected to the left bottom pipeline of the combustion furnace, the top output end of the combustion furnace is connected to the pipeline of the waste heat recovery mechanism, the flow regulating mechanism is arranged between the automatic feeding mechanism and the outer wall of the combustion furnace, and a plurality of bases are fixedly provided on both sides of the bottom of the processing table. When in use, the automatic feeding mechanism can realize stable and automatic feeding of fuel to avoid burns during manual feeding, and the fuel can be stirred and mixed to avoid incomplete combustion of the fuel. The operation of the automatic feeding mechanism drives the flow regulating mechanism to adaptively adjust the input air flow, so that the ratio of fuel and air is kept optimal to improve the combustion effect, and the waste heat recovery mechanism can fully recycle the heat after combustion to improve the utilization efficiency.

[0006] Furthermore, the automatic feeding mechanism includes a feeding hopper, which is fixedly arranged on the inner side of the mounting frame, the upper part of the feeding hopper is cylindrical, a top cover is fixedly arranged on the top of the feeding hopper, the edge of the top cover on one side away from the combustion furnace is connected to a top shaft, the left edge of the top cover is rotatably connected to a flap via the top shaft, the flap is detachably connected to the edge of the feeding hopper, the shape of the flap matches the top cross-section of the feeding hopper, a driving motor is arranged on the top of the top cover, a fixing frame is fixedly arranged between the driving motor and the top cover, the driving motor is arranged at the axis center of the feeding hopper, the output end of the driving motor is vertically downward, the output end of the driving motor is connected to a stirring shaft, the bottom end of the stirring shaft passes through the top cover and extends to the bottom of the feeding hopper, a plurality of stirring rods are fixedly arranged on the outer wall of the stirring shaft, and the stirring rods are vertically arranged to the stirring shaft. When loading, flip the cover upwards, then add fuel into the hopper, start the drive motor, and make the stirring shaft start to rotate. When the stirring shaft rotates, the stirring rod starts to rotate, thereby stirring and mixing the fuel to prevent the fuel from condensing into lumps that are not conducive to combustion.

[0007] Furthermore, a feeding cylinder is fixedly provided at the bottom output end of the feeding hopper, the feeding cylinder is cylindrical, and the feeding cylinder is arranged in a direction perpendicular to the side wall of the combustion furnace. A slope is provided at the bottom of the feeding hopper away from the combustion furnace, and the bottom end of the slope extends to the inner side of the left end of the feeding cylinder. A connecting plate is fixedly provided between the bottom end of the slope and the bottom of the inner side wall of the feeding cylinder. An inner cavity is formed between the slope, the connecting plate and the left end of the feeding cylinder. The bottom end of the stirring shaft passes through the slope and extends to the inside of the inner cavity. A driving bevel gear is connected to the bottom end of the stirring shaft. When the stirring shaft rotates, the driving bevel gear at the bottom thereof starts to rotate, and at this time, the fuel flows into the inside of the feeding cylinder along the slope after stirring.

[0008] Furthermore, a feed shaft is rotatably arranged at the axis center of the feed barrel, and the left end of the feed shaft passes through the connecting plate and extends to the left side wall of the inner cavity, and a driven bevel gear is arranged on the outer side of the left end of the feed shaft, and the driving bevel gear is meshed and connected with the driven bevel gear, and a spiral blade is fixedly arranged on the outer wall of the feed shaft, and the diameter of the spiral blade matches the inner diameter of the feed barrel, and the output end of the feed barrel is connected to the bottom of the combustion furnace, and a grate is arranged at the bottom of the combustion furnace, and an ash pit is arranged at the bottom of the grate, and the right end of the feed shaft extends to the inner bottom of the combustion furnace, and the right end of the feed shaft is connected to a rotating rod, and the rotating rod is vertically arranged to the feed shaft, and the length of the rotating rod is consistent with the height between the feed shaft and the grate, and the other end of the rotating rod is connected to a vibration block. When the driving bevel gear rotates, the driven bevel gear meshing with it starts to rotate, causing the feed shaft to start rotating. When the feed shaft rotates, it drives the spiral blade to start rotating, thereby pushing the fuel inside the feed barrel to the inside of the combustion furnace for combustion, thereby achieving stable and automatic loading of the fuel. The slag after combustion stays on the upper part of the grate. When the feed shaft rotates, it drives the rotating rod to start rotating, causing the vibration block at the other end of the rotating rod to periodically hit the grate, causing the slag to fall into the inside of the ash pit, thereby preventing the grate from being blocked.

[0009] Furthermore, the flow regulating mechanism includes a driving gear, which is arranged on the top outer side of the stirring shaft, an induced draft fan is fixedly arranged on the top of the left side wall of the combustion furnace, the bottom output end pipeline of the induced draft fan is connected to an air duct, a rotating part is rotatably arranged on the top outer side of the air duct, a driven gear is arranged around the outer side wall of the rotating part, the driving gear is arranged parallel to the axis of the driven gear, the driving gear and the driven gear have the same height, and a transmission chain is meshed between the driving gear and the driven gear. When the stirring shaft rotates, the driving gear starts to rotate, and when the driving gear rotates, the driven gear starts to rotate through the transmission chain meshed therewith, and when the driven gear rotates, the rotating part starts to rotate around the air duct, and when combustion occurs, the induced draft fan introduces external air into the interior of the combustion furnace through the air duct.

[0010] Furthermore, the rotating part is provided with an air hole inside, and a plurality of slide grooves are evenly arranged on the outer edge of the top of the air hole, and the direction of the slide groove faces the center of the air hole. The outer end of the slide groove is connected to a guide rod, and the other end of the guide rod is connected to a slide rod, and the slide rod is slidably connected to the slide groove, and the slide rod is arranged parallel to the axis of the air hole. A movable baffle is arranged on the top of the slide rod, and the movable baffle is evenly arranged along the axis of the air hole. The guide rod is a telescopic rod, and a spring is arranged around the outside of the guide rod. When the rotating part rotates, an outward centrifugal force is generated on the movable baffle, so that the movable baffle moves toward the outer end of the slide groove. At this time, the guide rod is shortened, the spring is compressed, and an elastic force in the opposite direction is generated on the movable baffle. When the rotation speed of the stirring shaft is faster, the fuel output is faster, and at this time, the rotation speed of the rotating part is faster, the centrifugal force on the movable baffle is greater, the opening amplitude is larger, and the flow area of ​​the air hole is larger, and the air flow rate is larger, so that the input air flow rate is adaptively adjusted, so that the ratio of fuel and air is kept optimal, and the combustion effect is improved.

[0011] Furthermore, the bottom output end of the air duct is connected to the bottom pipeline on the left side of the combustion furnace, a conical portion is provided on the inner top of the combustion furnace, and a filter is provided on the top output end of the combustion furnace. The hot air after combustion passes through the filter and flows out of the combustion furnace, and the smoke and dust impurities in the hot air can be filtered through the filter.

[0012] Furthermore, the waste heat recovery mechanism includes an air outlet pipe, the top input end of the air outlet pipe is connected to the top output end pipeline of the combustion furnace, a heat exchange chamber is arranged on the right side of the combustion furnace, the output end of the air outlet pipe is connected to the bottom pipeline of the left wall of the heat exchange chamber, the right top pipeline of the heat exchange chamber is connected to the input pipe, a heat exchange coil is arranged inside the heat exchange chamber, the output end of the input pipe is connected to the output end pipeline of the heat exchange coil, the right bottom pipeline of the heat exchange chamber is connected to the output pipe, the output end of the heat exchange coil is connected to the input end pipeline of the output pipe, and the interior of the heat exchange coil is filled with heat transfer liquid. After filtering, the hot air flow flows into the interior of the heat exchange chamber along the air outlet pipe, and the heat transfer liquid with a lower temperature at this time flows into the heat transfer coil along the input pipe, and the heat in the hot air flow is recycled, and the heated heat transfer liquid flows out along the output pipe.

[0013] Furthermore, the heat exchange coil is arranged in an "S" shape inside the heat exchange bin, and a plurality of limit plates are fixedly arranged inside the heat exchange bin, and the heat exchange coil is fixedly connected to the heat exchange bin through the limit plates, and the limit plates are staggered up and down in a direction parallel to the left and right side walls of the heat exchange bin, and the inside of the heat exchange bin is surrounded by the limit plates to form a circulation channel. The circulation channel surrounded by the limit plates can increase the contact time between the hot air flow and the heat transfer liquid, thereby improving the heat exchange efficiency as much as possible, and can fully recycle the heat after combustion.

[0014] Furthermore, the right top pipeline of the heat exchange bin is connected with an air outlet, and the output end of the air outlet is located at the output end of the circulation channel. The hot air flow after heat exchange is discharged along the air outlet for the next step of processing. Beneficial effects of the present invention: 1. The premixed gas hot blast furnace of the present invention can realize stable and automatic feeding of fuel through the automatic feeding mechanism, avoiding burns during manual feeding, and can stir and mix the fuel at the same time to avoid incomplete combustion of the fuel. The operation of the automatic feeding mechanism drives the flow regulating mechanism to adaptively adjust the input air flow, so that the ratio of fuel and air is kept optimal, improving the combustion effect, and the heat after combustion can be fully recovered and utilized through the waste heat recovery mechanism to improve the utilization efficiency.

[0015] 2. The premixed gas hot blast furnace of the present invention is provided with an automatic feeding mechanism. When the driving bevel gear rotates, the driven bevel gear meshing with it can be driven to start rotating, so that the feed shaft starts to rotate. When the feed shaft rotates, the spiral blades are driven to start rotating, thereby pushing the fuel inside the feed barrel to the inside of the combustion furnace for combustion, thereby realizing stable and automatic feeding of the fuel. The slag after combustion stays on the upper part of the grate. When the feed shaft rotates, it drives the rotating rod to start rotating, so that the vibration block at the other end of the rotating rod periodically hits the grate, causing the slag to fall into the inside of the ash pit, thereby avoiding clogging of the grate.

[0016] 3. The premixed gas hot air furnace of the present invention is provided with a flow regulating mechanism, which can generate an outward centrifugal force on the movable baffle when the rotating part rotates, so that the movable baffle moves toward the outer end of the slide slot. At this time, the guide rod is shortened and the spring is compressed, thereby generating an elastic force in the opposite direction on the movable baffle. When the rotation speed of the stirring shaft is faster and the fuel output is faster, the rotation speed of the rotating part is faster, the centrifugal force on the movable baffle is greater, and the opening amplitude is greater. At this time, the flow area of ​​the air hole is larger, and the air flow rate is greater, thereby adaptively adjusting the input air flow rate to keep the ratio of fuel and air optimal and improve the combustion effect.

[0017] 4. The premixed gas hot blast furnace of the present invention is provided with a waste heat recovery mechanism, and the contact time between the hot air flow and the heat transfer liquid can be increased through the circulation channel surrounded by the limit plate, thereby improving the heat exchange efficiency as much as possible and fully recovering the heat after combustion. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of the premixed gas hot blast furnace; Figure 2 This is a schematic diagram of the internal structure of the charging hopper of the premixed gas hot blast furnace; Figure 3 It is a schematic diagram of the top view of the rotating part of the premixed gas hot blast stove.

[0019] Explanation of reference numerals: 1. Processing table; 2. Mounting frame; 3. Reinforcement rib; 4. Base; 5. Feeding hopper; 6. Fixing frame; 7. Driving motor; 8. Stirring shaft; 9. Driving gear; 10. Transmission chain; 12. Inclined surface; 13. Feeding cylinder; 14. Combustion furnace; 17. Rotating rod; 18. Vibrating block; 19. Grate; 20. Ash pit; 21. Conical part; 22. Induced draft fan; 23. Air duct; 24. Filter; 25. Exhaust pipe; 26. Heat exchange chamber ; 27. Air outlet; 28. Limit plate; 29. ​​Input pipe; 30. Output pipe; 31. Heat exchange coil; 32. Flip cover; 33. Top shaft; 34. Stirring rod; 35. Connecting plate; 36. Inner cavity; 37. Driving bevel gear; 38. Driven bevel gear; 39. Feed shaft; 40. Spiral blade; 41. Driven gear; 42. Rotating part; 43. Air hole; 44. Slide; 45. Movable baffle; 46. Slide rod; 47. Guide rod; 48. Spring. DETAILED DESCRIPTION

[0020] The concept and technical effects of the present invention will be clearly and completely described below in conjunction with embodiments to fully understand the purpose, features and effects of the present invention.

[0021] like Figure 1-3 As shown, a premixed gas hot blast furnace comprises a processing table 1, an automatic feeding mechanism, a flow regulating mechanism and a waste heat recovery mechanism; A mounting frame 2 is fixedly arranged on the top of the left side of the processing table 1, the automatic feeding mechanism is arranged inside the mounting frame 2, and a reinforcing rib 3 is fixedly arranged between the bottoms of the adjacent mounting frames 2. The waste heat recovery mechanism is arranged on the right side of the top of the processing table 1, and a combustion furnace 14 is arranged between the automatic feeding mechanism and the waste heat recovery mechanism. The output end of the automatic feeding mechanism is connected to the left bottom pipeline of the combustion furnace 14, and the top output end of the combustion furnace 14 is connected to the pipeline of the waste heat recovery mechanism. The flow regulating mechanism is arranged between the automatic feeding mechanism and the outer wall of the combustion furnace 14, and a plurality of bases 4 are fixedly arranged on both sides of the bottom of the processing table 1. When in use, the automatic feeding mechanism can realize stable automatic feeding of fuel to avoid being burned during manual feeding, and the fuel can be stirred and mixed to avoid incomplete combustion of the fuel. The operation of the automatic feeding mechanism drives the flow regulating mechanism to adaptively adjust the input air flow, so that the ratio of fuel and air is kept optimal, and the combustion effect is improved. The waste heat recovery mechanism can fully recycle the heat after combustion to improve the utilization efficiency.

[0022] The automatic feeding mechanism includes a hopper 5, which is fixedly arranged on the inner side of the mounting frame 2. The upper part of the hopper 5 is cylindrical, and a top cover is fixedly arranged on the top of the hopper 5. The edge of the top cover away from the combustion furnace 14 is connected to a top shaft 33, and the left edge of the top cover is rotatably connected to a flip cover 32 through the top shaft 33. The flip cover 32 is detachably connected to the edge of the hopper 5, and the shape of the flip cover 32 matches the top cross-section of the hopper 5. The top of the top cover is provided with a driving motor 7, a fixing frame 6 is fixedly provided between the driving motor 7 and the top cover, the driving motor 7 is provided at the axis of the feeding hopper 5, the output end of the driving motor 7 is vertically downward, the output end of the driving motor 7 is connected with a stirring shaft 8, the bottom end of the stirring shaft 8 passes through the top cover and extends to the bottom of the feeding hopper 5, and the outer wall of the stirring shaft 8 is fixedly provided with a plurality of stirring rods 34, and the stirring rods 34 are vertically provided with the stirring shaft 8. When loading, flip the cover 32 upward, then add fuel to the inside of the feeding hopper 5, start the driving motor 7, so that the stirring shaft 8 starts to rotate, and when the stirring shaft 8 rotates, it drives the stirring rod 34 to start rotating, so as to stir and mix the fuel to prevent the fuel from condensing into lumps that are not conducive to combustion.

[0023] A feed barrel 13 is fixedly provided at the bottom output end of the hopper 5. The feed barrel 13 is cylindrical and is arranged in a direction perpendicular to the side wall of the combustion furnace 14. A slope 12 is provided at the bottom of the hopper 5 away from the combustion furnace 14. The bottom of the slope 12 extends to the inner side of the left end of the feed barrel 13. A connecting plate 35 is fixedly provided between the bottom end of the slope 12 and the bottom of the inner side wall of the feed barrel 13. An inner cavity 36 is formed between the slope 12, the connecting plate 35 and the left end of the feed barrel 13. The bottom end of the stirring shaft 8 passes through the slope 12 and extends to the inside of the inner cavity 36. A driving bevel gear 37 is connected to the bottom end of the stirring shaft 8. When the stirring shaft 8 rotates, the driving bevel gear 37 at the bottom thereof starts to rotate. At this time, the fuel flows into the inside of the feed barrel 13 along the slope 12 after stirring.

[0024] A feed shaft 39 is rotatably provided at the axis center of the feed barrel 13. The left end of the feed shaft 39 passes through the connecting plate 35 and extends to the left side wall of the inner cavity 36. A driven bevel gear 38 is provided on the outer side of the left end of the feed shaft 39. The driving bevel gear 37 is meshed and connected with the driven bevel gear 38. A spiral blade 40 is fixedly provided on the outer side wall of the feed shaft 39. The diameter of the spiral blade 40 matches the inner diameter of the feed barrel 13. The output end of the feed barrel 13 is connected to the The bottom of the combustion furnace 14 is connected, and a grate 19 is provided at the bottom of the combustion furnace 14. An ash pit 20 is provided at the bottom of the grate 19. The right end of the feed shaft 39 extends to the inner bottom of the combustion furnace 14. The right end of the feed shaft 39 is connected to a rotating rod 17. The rotating rod 17 is vertically arranged to the feed shaft 39. The length of the rotating rod 17 is consistent with the height between the feed shaft 39 and the grate 19. The other end of the rotating rod 17 is connected to a vibration block 18. When the driving bevel gear 37 rotates, the driven bevel gear 38 meshing with it starts to rotate, so that the feed shaft 39 starts to rotate. When the feed shaft 39 rotates, the spiral blade 40 starts to rotate, thereby pushing the fuel inside the feed barrel 13 to the inside of the combustion furnace 14 for combustion, thereby realizing stable and automatic loading of the fuel. The slag after combustion stays on the upper part of the grate 19. When the feed shaft 39 rotates, it drives the rotating rod 17 to start rotating, so that the vibration block 18 at the other end of the rotating rod 17 periodically hits the grate 19, so that the slag falls into the inside of the ash pit 20, avoiding the grate 19 from being blocked.

[0025] The flow regulating mechanism includes a driving gear 9, which is arranged on the top outer side of the stirring shaft 8. The top of the left side wall of the combustion furnace 14 is fixedly provided with an induced draft fan 22, and the bottom output end pipeline of the induced draft fan 22 is connected with an air duct 23. The top outer side of the air duct 23 is provided with a rotating part 42 rotatably arranged, and the outer side wall of the rotating part 42 is surrounded by a driven gear 41. The driving gear 9 is arranged parallel to the axis of the driven gear 41, and the height of the driving gear 9 is consistent with that of the driven gear 41. The driving gear 9 and the driven gear 41 are meshed with a transmission chain 10. When the stirring shaft 8 rotates, the driving gear 9 is driven to start rotating. When the driving gear 9 rotates, the driven gear 41 is driven to start rotating through the transmission chain 10 meshed therewith. When the driven gear 41 rotates, the rotating part 42 is driven to start rotating around the air duct 23. During combustion, the induced draft fan 22 introduces external air into the combustion furnace 14 through the air duct 23.

[0026] An air hole 43 is provided inside the rotating part 42, and a plurality of slide grooves 44 are evenly arranged on the outer edge of the top of the air hole 43, and the direction of the slide groove 44 is toward the center of the air hole 43. The outer end of the slide groove 44 is connected to a guide rod 47, and the other end of the guide rod 47 is connected to a slide rod 46, and the slide rod 46 is slidably connected to the slide groove 44, and the slide rod 46 is arranged parallel to the axis of the air hole 43. A movable baffle 45 is arranged on the top of the slide rod 46, and the movable baffle 45 is evenly arranged along the axis of the air hole 43. The guide rod 47 is a telescopic rod, and a spring 48 is arranged around the outside of the guide rod 47. When the rotating part 42 rotates, an outward centrifugal force is generated on the movable baffle 45, causing the movable baffle 45 to move toward the outer end of the slide groove 44. At this time, the guide rod 47 is shortened and the spring 48 is compressed, generating an elastic force in the opposite direction on the movable baffle 45. When the rotation speed of the stirring shaft 8 is faster, the fuel output is faster. At this time, the rotation speed of the rotating part 42 is faster, the centrifugal force on the movable baffle 45 is greater, and the opening range is larger. At this time, the flow area of ​​the air hole 43 is larger, and the air flow rate is larger, so that the input air flow rate is adaptively adjusted to keep the ratio of fuel and air optimal and improve the combustion effect.

[0027] The bottom output end of the air duct 23 is connected to the bottom pipeline on the left side of the combustion furnace 14. The inner top of the combustion furnace 14 is provided with a conical portion 21, and the top output end of the combustion furnace 14 is provided with a filter 24. The hot air after combustion flows through the filter 24 and flows out of the combustion furnace 14, and the filter 24 can filter the smoke and impurities in the hot air flow.

[0028] The waste heat recovery mechanism includes an air outlet pipe 25, the top input end of the air outlet pipe 25 is connected to the top output end pipeline of the combustion furnace 14, a heat exchange chamber 26 is arranged on the right side of the combustion furnace 14, the output end of the air outlet pipe 25 is connected to the bottom pipeline of the left wall of the heat exchange chamber 26, the right top pipeline of the heat exchange chamber 26 is connected to the input pipe 29, a heat exchange coil 31 is arranged inside the heat exchange chamber 26, the output end of the input pipe 29 is connected to the output end pipeline of the heat exchange coil 31, the right bottom pipeline of the heat exchange chamber 26 is connected to the output pipe 30, the output end of the heat exchange coil 31 is connected to the input end pipeline of the output pipe 30, and the inside of the heat exchange coil 31 is filled with heat transfer liquid. After filtering, the hot air flow flows into the inside of the heat exchange chamber 26 along the air outlet pipe 25, and the heat transfer liquid with a lower temperature flows into the heat exchange coil 31 along the input pipe 29, so that the heat in the hot air flow is recycled, and the heated heat transfer liquid flows out along the output pipe 30.

[0029] The heat exchange coil 31 is arranged in an "S" shape inside the heat exchange bin 26. A plurality of limit plates 28 are fixedly arranged inside the heat exchange bin 26. The heat exchange coil 31 is fixedly connected to the heat exchange bin 26 through the limit plates 28. The limit plates 28 are staggered up and down in a direction parallel to the left and right side walls of the heat exchange bin 26. The inside of the heat exchange bin 26 is surrounded by the limit plates 28 to form a circulation channel. The circulation channel surrounded by the limit plates 28 can increase the contact time between the hot air flow and the heat transfer liquid, thereby improving the heat exchange efficiency as much as possible, and can fully recycle the heat after combustion.

[0030] The right top pipeline of the heat exchange chamber 26 is connected with an air outlet 27, and the output end of the air outlet 27 is located at the output end of the circulation channel. The hot air flow after heat exchange is discharged along the air outlet 27 for the next step of processing.

[0031] Working principle: when loading, flip the cover 32 upwards, then add fuel into the hopper 5, start the drive motor 7, so that the stirring shaft 8 starts to rotate, and the stirring shaft 8 drives the stirring rod 34 to start rotating, so as to stir and mix the fuel to prevent the fuel from condensing into lumps that are not conducive to combustion. When the stirring shaft 8 rotates, it drives the driving bevel gear 37 at the bottom to start rotating. At this time, after stirring, the fuel flows into the inside of the feeding barrel 13 along the inclined surface 12, and when the driving bevel gear 37 rotates, it drives the driven bevel gear 3 meshing with it. 8 starts to rotate, causing the feed shaft 39 to start rotating. When the feed shaft 39 rotates, the spiral blade 40 starts to rotate, thereby pushing the fuel inside the feed barrel 13 to the inside of the combustion furnace 14 for combustion, thereby realizing stable and automatic feeding of the fuel. The slag after combustion stays on the upper part of the grate 19. When the feed shaft 39 rotates, it drives the rotating rod 17 to start rotating, so that the vibration block 18 at the other end of the rotating rod 17 periodically hits the grate 19, causing the slag to fall into the inside of the ash pit 20, thereby avoiding the grate 19 from being blocked.

[0032] When the stirring shaft 8 rotates, the driving gear 9 starts to rotate. When the driving gear 9 rotates, the driven gear 41 starts to rotate through the transmission chain 10 meshing therewith. When the driven gear 41 rotates, the rotating part 42 starts to rotate around the air duct 23. During combustion, the outside air is introduced into the combustion furnace 14 through the air duct 23 through the induced draft fan 22. When the rotating part 42 rotates, an outward centrifugal force is generated on the movable baffle 45, causing the movable baffle 45 to move toward the outer end of the slide groove 44. At this time, the guide rod 47 is shortened, the spring 48 is compressed, and the movable baffle 45 is pressed against the movable baffle. The plate 45 generates elastic force in the opposite direction. The faster the rotation speed of the stirring shaft 8 is, the faster the fuel is output. At this time, the faster the rotation speed of the rotating part 42 is, the greater the centrifugal force exerted on the movable baffle 45 is, and the larger the opening amplitude is. At this time, the flow area of ​​the air hole 43 is larger, and the air flow rate is larger, so that the input air flow rate is adaptively adjusted to keep the ratio of fuel and air optimal and improve the combustion effect; the hot air after combustion passes through the filter 24 and flows out of the combustion furnace 14, and the smoke impurities in the hot air flow can be filtered through the filter 24.

[0033] After being filtered, the hot air flow flows into the interior of the heat exchange chamber 26 along the air outlet pipe 25. At this time, the heat transfer liquid with a lower temperature flows into the heat exchange coil 31 along the input pipe 29, and the heat in the hot air flow is recovered and utilized. The heated heat transfer liquid flows out along the output pipe 30. The circulation channel surrounded by the limit plate 28 can increase the contact time between the hot air flow and the heat transfer liquid, thereby improving the heat exchange efficiency as much as possible, and the heat after combustion can be fully recovered and utilized. The hot air flow after heat exchange is discharged along the air outlet 27 for the next step of processing.

[0034] The above embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative work shall all fall within the scope of protection of the present invention.

Claims

1. A premixed gas hot air stove, characterized in that: It comprises a processing table (1), an automatic feeding mechanism, a flow regulating mechanism and a waste heat recovery mechanism; A mounting frame (2) is fixedly arranged on the top of the left side of the processing table (1), the automatic feeding mechanism is arranged inside the mounting frame (2), reinforcing ribs (3) are fixedly arranged between the bottoms of adjacent mounting frames (2), the waste heat recovery mechanism is arranged on the right side of the top of the processing table (1), a combustion furnace (14) is arranged between the automatic feeding mechanism and the waste heat recovery mechanism, the output end of the automatic feeding mechanism is connected to the bottom pipeline of the left side of the combustion furnace (14), the top output end of the combustion furnace (14) is connected to the pipeline of the waste heat recovery mechanism, the flow regulating mechanism is arranged between the automatic feeding mechanism and the outer side wall of the combustion furnace (14), and a plurality of bases (4) are fixedly arranged on both sides of the bottom of the processing table (1).

2. A premixed gas hot air stove according to claim 1, characterized in that The automatic feeding mechanism comprises a feeding hopper (5), the feeding hopper (5) is fixedly arranged on the inner side of the mounting frame (2), the upper part of the feeding hopper (5) is arranged in a cylindrical shape, a top cover is fixedly arranged on the top of the feeding hopper (5), a side edge of the top cover away from the combustion furnace (14) is connected to a top shaft (33), a left side edge of the top cover is rotatably connected to a flip cover (32) through the top shaft (33), the flip cover (32) is detachably connected to the edge of the feeding hopper (5), and the shape of the flip cover (32) matches the top cross section of the feeding hopper (5). A driving motor (7) is arranged on the top of the top cover, a fixing frame (6) is fixedly arranged between the driving motor (7) and the top cover, the driving motor (7) is arranged at the axis of the feeding hopper (5), the output end of the driving motor (7) is vertically downward, the output end of the driving motor (7) is connected to a stirring shaft (8), the bottom end of the stirring shaft (8) passes through the top cover and extends to the bottom of the feeding hopper (5), and a plurality of stirring rods (34) are fixedly arranged on the outer wall of the stirring shaft (8), and the stirring rods (34) are arranged vertically to the stirring shaft (8).

3. A premixed gas hot air stove according to claim 2, characterized in that A feed barrel (13) is fixedly arranged at the bottom output end of the feeding hopper (5), the feed barrel (13) is cylindrical and arranged in a direction perpendicular to the side wall of the combustion furnace (14), a slope (12) is arranged at the bottom of the feeding hopper (5) away from the combustion furnace (14), the bottom end of the slope (12) extends to the inner side of the left end of the feed barrel (13), a connecting plate (35) is fixedly arranged between the bottom end of the slope (12) and the bottom of the inner wall of the feed barrel (13), an inner cavity (36) is formed between the slope (12), the connecting plate (35) and the left end of the feed barrel (13), the bottom end of the stirring shaft (8) passes through the slope (12) and extends to the inside of the inner cavity (36), and the bottom end of the stirring shaft (8) is connected to a driving bevel gear (37).

4. A premixed gas hot air stove according to claim 3, characterized in that A feed shaft (39) is rotatably arranged at the axis of the feed barrel (13), the left end of the feed shaft (39) penetrates the connecting plate (35) and extends to the left side wall of the inner cavity (36), a driven bevel gear (38) is arranged on the outer side of the left end of the feed shaft (39), the driving bevel gear (37) is meshingly connected with the driven bevel gear (38), a spiral blade (40) is fixedly arranged on the outer side wall of the feed shaft (39), the diameter of the spiral blade (40) matches the inner diameter of the feed barrel (13), and the output end of the feed barrel (13) is connected to the inner diameter of the feed barrel (13). The bottom of the combustion furnace (14) is connected, a grate (19) is arranged at the bottom of the combustion furnace (14), an ash pit (20) is arranged at the bottom of the grate (19), the right end of the feed shaft (39) extends to the inner bottom of the combustion furnace (14), the right end of the feed shaft (39) is connected to a rotating rod (17), the rotating rod (17) and the feed shaft (39) are arranged vertically, the length of the rotating rod (17) is consistent with the height between the feed shaft (39) and the grate (19), and the other end of the rotating rod (17) is connected to a vibration block (18).

5. A premixed gas hot air stove according to claim 2, characterized in that The flow regulating mechanism comprises a driving gear (9), wherein the driving gear (9) is arranged on the outer side of the top of the stirring shaft (8); an induced draft fan (22) is fixedly arranged on the top of the left side wall of the combustion furnace (14); the bottom output end pipeline of the induced draft fan (22) is connected to an air duct (23); a rotating part (42) is rotatably arranged on the outer side of the top of the air duct (23); a driven gear (41) is circumferentially arranged on the outer side wall of the rotating part (42); the driving gear (9) and the driven gear (41) are arranged parallel to each other in axis; the driving gear (9) and the driven gear (41) are at the same height; and a transmission chain (10) is meshed between the driving gear (9) and the driven gear (41).

6. A premixed gas hot air stove according to claim 5, characterized in that The rotating part (42) is provided with an air hole (43) inside, and a plurality of slide grooves (44) are evenly arranged on the outer edge of the top of the air hole (43), and the direction of the slide groove (44) is toward the center of the air hole (43). The outer end of the slide groove (44) is connected to a guide rod (47), and the other end of the guide rod (47) is connected to a slide rod (46), and the slide rod (46) is slidably connected to the slide groove (44), and the slide rod (46) is arranged parallel to the axis of the air hole (43). A movable baffle (45) is arranged on the top of the slide rod (46), and the movable baffle (45) is evenly arranged along the axis of the air hole (43). The guide rod (47) is a telescopic rod, and a spring (48) is arranged around the outside of the guide rod (47).

7. A premixed gas hot blast stove according to claim 6, characterized in that The bottom output end of the air duct (23) is connected to the bottom pipeline on the left side of the combustion furnace (14), a conical portion (21) is provided at the inner top of the combustion furnace (14), and a filter screen (24) is provided at the top output end of the combustion furnace (14).

8. The premixed gas hot air stove according to claim 1, characterized in that The waste heat recovery mechanism comprises an air outlet pipe (25), the top input end of the air outlet pipe (25) is connected to the top output end pipeline of the combustion furnace (14), a heat exchange chamber (26) is arranged on the right side of the combustion furnace (14), the output end of the air outlet pipe (25) is connected to the bottom pipeline of the left wall of the heat exchange chamber (26), the top pipeline on the right side of the heat exchange chamber (26) is connected to the input pipe (29), a heat exchange coil (31) is arranged inside the heat exchange chamber (26), the output end of the input pipe (29) is connected to the output end pipeline of the heat exchange coil (31), the bottom pipeline on the right side of the heat exchange chamber (26) is connected to the output pipe (30), the output end of the heat exchange coil (31) is connected to the input end pipeline of the output pipe (30), and the interior of the heat exchange coil (31) is filled with heat transfer fluid.

9. A premixed gas hot blast stove according to claim 8, characterized in that The heat exchange coil (31) is arranged in an "S" shape inside the heat exchange bin (26); a plurality of limit plates (28) are fixedly arranged inside the heat exchange bin (26); the heat exchange coil (31) is fixedly connected to the heat exchange bin (26) via the limit plates (28); the limit plates (28) are staggered up and down in a direction parallel to the left and right side walls of the heat exchange bin (26); the interior of the heat exchange bin (26) is surrounded by the limit plates (28) to form a circulation channel.

10. A premixed gas hot air stove according to claim 9, characterized in that The top pipeline on the right side of the heat exchange chamber (26) is connected to an air outlet (27), and the output end of the air outlet (27) is located at the output end of the circulation channel.

Images