Full-automatic biomass hot blast stove

Abstract

The invention provides a full-automatic biomass hot blast stove which comprises a case, a combustion chamber, a settling chamber, a heat exchange chamber and an equipment chamber, the combustion chamber, the settling chamber, the heat exchange chamber and the equipment chamber are sequentially arranged in the case, a stove body for combusting biomass fuel is arranged in the combustion chamber, and a control chamber for supplying materials and air to the stove body is arranged on one side of the combustion chamber; a grate for stacking biomass fuel is arranged in the furnace body, an ash removal box is arranged at the lower end of the furnace body, an air separation chamber is arranged between the grate and the ash removal box, an air inlet pipe is arranged on one side of the air separation chamber, and the air inlet pipe is communicated with a combustion fan in the control chamber. According to the full-automatic biomass hot-blast stove, improvement is carried out aiming at various factors of smoke dust generation, the dust content in smoke generated by the full-automatic biomass hot-blast stove is reduced, pipeline blockage is avoided, the heat exchange efficiency is improved, and convenience is also provided for subsequent smoke treatment.

Description

Technical Field

[0001] The invention relates to the technical field of biomass hot blast furnaces, in particular to a fully automatic biomass hot blast furnace. Background Art

[0002] Biomass hot air furnace is a thermal equipment that uses biomass fuel combustion to generate high-temperature hot air. It is mainly composed of a biomass combustion chamber, a heat exchanger and a hot air delivery system. The biomass hot air furnace uses biomass pellet fuel as the main fuel, transfers the heat generated by fuel combustion to hot air, and thus provides heat source for various drying, baking, smelting and other process processes.

[0003] During the use of the existing biomass hot air furnace, air needs to be supplied to the lower end of the grate to provide the oxygen required for combustion and to conduct heat away through the wind. In the heat exchange chamber, heat exchange tubes are used to exchange heat between the flue gas and the external airflow. However, the high-temperature flue gas generated in the combustion chamber carries a lot of dust particles. The circulating dust particles will adhere to the inner wall of the heat exchange tube, affecting the heat exchange efficiency. The accumulated dust will also affect the gas circulation and even cause partial blockage of the flue gas duct.

[0004] In view of this, in order to overcome the above technical problems, the present invention proposes a fully automatic biomass hot air furnace to solve the above technical problems. Summary of the invention

[0005] The technical problem solved by the present invention is to provide a fully automatic biomass hot air furnace for reducing the dust content in flue gas, so as to solve the problems raised in the above-mentioned background technology.

[0006] The technical problem solved by the present invention is achieved by the following technical scheme: a fully automatic biomass hot air furnace, comprising a chassis and a combustion chamber, a settling chamber, a heat exchange chamber and an equipment room arranged in sequence in the chassis, the combustion chamber being provided with a furnace body for burning biomass fuel, a control room for feeding and air supplying to the furnace body being provided on one side of the combustion chamber, a grate for stacking biomass fuel being provided in the furnace body, an ash cleaning box being provided at the lower end of the furnace body, an air isolation chamber being provided between the grate and the ash cleaning box, an air inlet pipe being provided on one side of the air isolation chamber, and the air inlet pipe being connected to a combustion-supporting fan in the control room; one side of the furnace body is connected to the settling chamber through a smoke exhaust pipe, so as to utilize the settling chamber to further reduce the dust of the flue gas; the heat exchange chamber comprising an upper smoke channel, a lower smoke channel, and heat exchange tubes distributed and installed between the upper smoke channel and the lower smoke channel, a cleaning mechanism for cleaning the dust sticking to the inner wall of the heat exchange tube is provided at the upper end of the chassis corresponding to the heat exchange tube.

[0007] As a further embodiment of the present invention: The wind isolation chamber includes a first cylindrical chamber and a second chamber integrally connected to the first chamber. The second chamber is a conical structure. The air inlet pipe is arranged on one side of the first chamber and is arranged along a tangent to the inner wall of the first chamber so that the air flow introduced into the wind isolation chamber swirls in its course. The lower end of the second chamber is connected to the cleaning box through a cleaning port, and a conical wind shield is provided at the upper end of the cleaning port.

[0008] As a further embodiment of the present invention: The grate is a basin-shaped structure, the lower end of the grate is inserted into the windproof chamber, and the side and bottom of the grate are respectively provided with openings so that the cyclone in the windproof chamber is guided to the upper end of the grate from the side and bottom openings.

[0009] As a further embodiment of the present invention: A feeding hopper is provided at the upper end of the control room, and a screw feeder is connected to the lower end of the feeding hopper. The discharge end of the screw feeder is connected to a guide hole on one side of the furnace body so that the material can be quantitatively put into the guide hole; an inclined guide plate is provided on the guide hole to receive the biomass particles discharged by the screw feeder, and a blowing chamber is provided at the lower end of the guide plate. A plurality of blowing holes connected to the blowing chamber are distributed on the guide plate, and an air supply pipe is connected to the outer end of the blowing chamber, and the air supply pipe is connected to the combustion-supporting fan to supply air to the blowing chamber, so as to blow the particles that fall to the guide plate upward and scatter them.

[0010] As a further embodiment of the present invention: The settling chamber includes a settling cavity and settling channels arranged on both sides of the settling cavity. A dust collecting channel for collecting dust is provided in the middle of the lower end of the settling cavity. An air guide plate for guiding air to the settling channels on both sides is provided in the settling cavity. The air guide plate is obliquely arranged in the settling cavity to lift the flue gas introduced into the settling cavity and introduce it into the settling channel. A spiral dust collector is provided at the lower end of the dust collecting channel. The spiral dust collector includes a spiral blade shaft and a dust exhaust motor connected to the spiral blade shaft in a transmission manner to discharge dust from the discharge hopper of the spiral dust collector. A channel hole is provided at the lower end of the settling channel to communicate with the lower flue gas channel in the heat exchange chamber through the channel hole.

[0011] As a further embodiment of the present invention: A plurality of groups of wind partitions are distributed in the lower flue gas channel. The wind partitions are bent triangular structures. Dust dropping notches are provided between adjacent wind partitions to divide the lower flue gas channel into a dust collecting area and a ventilation area.

[0012] As a further embodiment of the present invention: The cleaning mechanism includes a bracket installed in the upper flue gas channel, a cleaning shaft installed at the lower end of the bracket, and a driving cylinder for controlling the lifting and moving of the bracket. The driving cylinder is installed at the upper end of the chassis. The driving cylinder can be an electric cylinder or a hydraulic cylinder. The lower end of the cleaning shaft is installed with a cleaning component inserted into the heat exchange tube; the cleaning component includes a seat sleeve installed at the lower end of the cleaning shaft and a first cleaning frame and a second cleaning frame respectively arranged on both sides of the seat sleeve. The first cleaning frame and the second cleaning frame are inserted into the heat exchange tube, and the first cleaning frame and the second cleaning frame are respectively arranged on both sides of the inner cavity of the heat exchange tube. The first cleaning frame and the second cleaning frame are respectively provided with scrapers, and the scrapers are vertically spaced and arranged to scrape the inner wall of the heat exchange tube.

[0013] As a further embodiment of the present invention: The upper ends of the first cleaning frame and the second cleaning frame are elastically slidably mounted on the seat cover, and a plurality of elastic pressure pieces are distributed between the first cleaning frame and the second cleaning frame, so that the first cleaning frame and the second cleaning frame are elastically arranged, and the scrapers are elastically pressed against the inner wall of the heat exchange tube respectively.

[0014] As a further embodiment of the present invention: The upper ends of the first cleaning frame and the second cleaning frame are respectively provided with slides, and the slides on the first cleaning frame and the second cleaning frame are arranged opposite to each other so as to be slidably inserted into the seat cover respectively. The lower ends of the slides of the first cleaning frame and the second cleaning frame are respectively provided with limit pins, and the corresponding limit columns on both sides of the lower end of the seat cover are respectively provided with strip-shaped limit holes, and the limit pins are inserted into the limit holes to prevent the slides from detaching from the seat cover. The opposite ends of the slides on both sides of the seat cover are respectively provided with grooves, and first springs are installed in the grooves to push the slides on both sides to move outward.

[0015] As a further embodiment of the present invention: The spring-pressing member includes a spring barrel installed on the first cleaning frame and a rod seat arranged on the second cleaning frame, the rod seat is provided with a spring rod inserted into the spring barrel and slidably arranged, and the spring rod is located in the inner cavity of the spring barrel and is integrally connected with a spring block, and the inner cavity of the spring barrel is provided with a second spring that pushes the spring block to move outward to elastically separate the first cleaning frame and the second cleaning frame, so that the scrapers distributed outside the first cleaning frame and the second cleaning frame are elastically attached to the inner wall of the heat exchange tube.

[0016] As a further embodiment of the present invention: The upper end of the bracket may also be provided with a guide rod, and the chassis is provided with a guide sleeve corresponding to the guide rod, and the guide rod is slidably inserted into the guide sleeve.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention improves the existing fully automatic biomass hot air furnace, and an air isolation chamber is provided between the improved furnace body and the ash cleaning box, and the air isolation chamber is used to prevent the combustion-supporting wind from raising the dust inside the ash cleaning box; the grate is a basin-shaped structure, which helps the combustion-supporting wind to pass through the grate from the bottom and all around, so that the combustion-supporting oxygen supply is more uniform and sufficient, and the feed hopper automatically and quantitatively supplies biomass particles into the furnace body through a spiral feeder, and the spiral feeder guides the biomass particles onto the guide plate, and uses a fan to guide the air to the blowing chamber to blow the material on the guide plate and throw it into the furnace body, which helps the biomass particles to be evenly dispersed, so that the biomass particles burn more fully, thereby reducing the incompletely burned particles in the flue gas. One side of the furnace body is connected to the settling chamber through a smoke exhaust pipe, so that the dust in the high-temperature flue gas is collected and settled by the settling chamber, and finally introduced into the heat exchange chamber. The heat exchange chamber uses a wind baffle to divide the lower flue gas channel into a dust collection area and a ventilation area to prevent dust from being raised again. The inner wall of the heat exchange tube is then regularly scraped and cleaned by a cleaning mechanism to prevent dust from sticking and accumulating. The cleaning mechanism includes a first cleaning frame and a second cleaning frame that are elastically arranged. The driving cylinder drives the first cleaning frame and the second cleaning frame that are distributed to move up and down through the bracket to scrape the inner wall of the heat exchange tube with a scraper. The present invention improves various factors that generate flue gas dust, reduces the dust content in the flue gas generated by the fully automatic biomass hot air furnace, avoids pipeline blockage, improves heat exchange efficiency, and also provides convenience for subsequent flue gas treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a partial cross-sectional structural schematic diagram of the present invention; Figure 3 It is a schematic diagram of the internal structure of the settling chamber of the present invention; Figure 4 for Figure 2 The enlarged structural diagram at A in the middle; Figure 5 It is a partial cross-sectional structural schematic diagram of the cleaning component of the present invention; Figure 6 for Figure 5 The enlarged structural diagram at B in the middle; Figure 7 for Figure 5 The enlarged structural diagram at C in the middle; Markings in the figure: 1. Chassis; 2. Combustion chamber; 3. Settling chamber; 4. Heat exchange chamber; 5. Equipment room; 6. Control room; 7. Bracket; 8. Spring-pressed piece; 11. Smoke outlet; 12. Hot air outlet; 21. Furnace body; 22. Grate; 23. Ash cleaning box; 24. Windproof chamber; 25. Air inlet pipe; 26. Smoke exhaust pipe; 27. Wind shield; 31. Settling chamber; 32. Settling channel; 33. Dust collection channel; 34. Wind guide plate; 35. Spiral dust collector; 41. Upper flue gas channel; 42. Lower flue gas channel; 43. Heat exchange tube; 44. Windproof plate; 45. Ash drop slot; 51. Hot air blower; 61. Feed hopper; 62. Screw feeder; 63. Guide hole; 64. Guide plate; 65. Blowing chamber; 66. Blowing hole; 67. Air supply pipe; 68. Combustion-supporting fan; 69. Air distribution box; 70. Guide rod; 71. Cleaning shaft; 72. Drive cylinder; 73. First cleaning frame; 74. Second cleaning frame; 75. Scraper; 76. Seat cover; 77. Slide plate; 78. Limit pin; 79. First spring; 81. Spring cylinder; 82. Rod seat; 83. Spring rod; 84. Spring block; 85. Second spring. DETAILED DESCRIPTION

[0019] In order to make the technical means for realizing the present invention, the creative features, the objectives and effects to be achieved easily understood, the present invention is further described below with reference to specific diagrams.

[0020] like Figures 1 to 7 As shown, The present embodiment provides a fully automatic biomass hot air furnace, including a chassis 1 and a combustion chamber 2, a settling chamber 3, a heat exchange chamber 4 and an equipment chamber 5 arranged in sequence in the chassis 1, wherein the combustion chamber 2 is provided with a furnace body 21 for burning biomass fuel, and one side of the combustion chamber 2 is provided with a control chamber 6 for feeding and supplying air to the furnace body 21, and the furnace body 21 is provided with a grate 22 for stacking biomass fuel, and a dust cleaning box 23 is provided at the lower end of the furnace body 21, and an air isolation chamber 24 is provided between the grate 22 and the dust cleaning box 23, and an air inlet pipe 25 is provided on one side of the air isolation chamber 24, and the air inlet pipe 25 is connected to the combustion air in the control chamber 6. The furnace body 21 is connected to the settling chamber 3 through the smoke exhaust duct 26 to further reduce the dust in the flue gas. The heat exchange chamber 4 includes an upper smoke channel 41, a lower smoke channel 42, and heat exchange tubes 43 distributed between the upper smoke channel 41 and the lower smoke channel 42. A cleaning mechanism for cleaning the dust sticking to the inner wall of the heat exchange tube 43 is provided at the upper end of the chassis 1 corresponding to the heat exchange tube 43.

[0021] The grate 22 and the ash cleaning box 23 in the traditional furnace body 21 are connected structures. The ash on the grate 22 falls directly into the ash cleaning box 23. When the combustion-supporting fan 68 supplies air to the lower end of the grate 22, the dust in the ash cleaning box 23 will be raised, increasing the dust content in the flue gas. Therefore, in this application document, the grate 22 and the ash cleaning box 23 are separated by an air isolation chamber 24, and the ash is introduced into the ash cleaning box 23 through the air isolation chamber 24. The combustion-supporting fan 68 blows air into the inner cavity of the air isolation chamber 24 through the air inlet pipe 25 to increase the oxygen required for biomass combustion and transfer heat. The flue gas discharged from the furnace body 21 is connected to the settling chamber 3 through the smoke exhaust pipe 26 to further reduce the dust in the flue gas, and finally the flue gas is sent into the heat exchange chamber 4. In order to prevent the remaining smoke dust in the flue gas from sticking to the inner wall of the heat exchange tube 43, the inner wall of the heat exchange tube 43 is regularly scraped by a cleaning mechanism to remove the sticky dust and improve the heat exchange efficiency of the heat exchange tube 43.

[0022] During the combustion of biomass fuel, the ash will fall into the windproof chamber 24 through the grate 22. In order to allow the ash to pass through the windproof chamber 24 and enter the ash cleaning box 23 smoothly and reduce the ash from entering the flue gas, in one embodiment, Figure 2 As shown, the wind-isolating chamber 24 includes a first cylindrical chamber, and a second chamber connected to the first chamber as a whole. The second chamber is a conical structure. The air inlet pipe 25 is arranged on one side of the first chamber and is arranged along a tangent to the inner wall of the first chamber, so that the air flow introduced into the wind-isolating chamber 24 swirls in its stroke, which helps the ash and other particles to move downward due to centrifugal force and finally enter the ash cleaning box 23. The lower end of the second chamber is connected to the ash cleaning box 23 through a ash cleaning port, and a conical wind shield 27 is provided at the upper end of the ash cleaning port to prevent wind from entering the ash cleaning box 23.

[0023] Some of the dust particles in the flue gas are incompletely burned particles, which are granular dust produced by incomplete combustion of biomass fuel. By improving the combustion efficiency of biomass fuel and making biomass burn fully, the dust content in the flue gas can be further reduced. The air supply efficiency and the amount of biomass particles added can be used to coordinate with each other to make the biomass particles burn more fully.

[0024] In order to solve the above problems, in one implementation, Figure 2 As shown, the grate 22 is a basin-shaped structure, and the lower end of the grate 22 is inserted into the wind-proof chamber 24. The sides and bottom of the grate 22 are respectively provided with openings, so that the cyclone in the wind-proof chamber 24 is guided from the side and bottom openings to the upper end of the grate 22, providing more sufficient and uniform oxygen content and improving combustion efficiency.

[0025] A feeding hopper 61 is provided at the upper end of the control chamber 6, and a screw feeder 62 is connected to the lower end of the feeding hopper 61. The discharge end of the screw feeder 62 is connected to a guide hole 63 on one side of the furnace body 21 so as to quantitatively feed the material into the guide hole 63; an inclined guide plate 64 is provided on the guide hole 63 to receive the biomass particles discharged by the screw feeder 62, and a blowing chamber 65 is provided at the lower end of the guide plate 64. A plurality of blowing holes 66 connected to the blowing chamber 65 are distributed on the guide plate 64, and an air supply pipe 67 is connected to the outer end of the blowing chamber 65. The air supply pipe 67 is connected to a combustion-supporting fan 68 to supply air to the blowing chamber 65, and the particles falling to the guide plate 64 are blown up and thrown, so that the biomass particles are evenly distributed on the grate 22, thereby improving the completeness of combustion and preventing the biomass particles from falling and accumulating on one side of the grate 22 to cause incomplete combustion. The blowing port of the combustion-supporting fan 68 is provided with a wind box 69, and the air inlet pipe 25 and the air supply pipe 67 are respectively connected to the wind box 69. The screw feeder 62 includes a screw barrel and a screw feeding shaft built in the screw barrel. An opening is provided on one side of the upper end of the screw barrel to communicate with the bottom of the feeding hopper 61. The screw feeding shaft is provided with a spiral blade, and the screw feeding shaft is connected to the feeding motor on one side of the screw barrel. The speed and rotation time are controlled by the feeding motor to promote the quantitative automatic feeding of materials.

[0026] In one embodiment, Figure 3 As shown, the flue gas discharged from the furnace body 21 further reduces the dust content through the settling chamber 3. The settling chamber 3 includes a settling chamber 31 and settling channels 32 arranged on both sides of the settling chamber 31. A dust collecting channel 33 for collecting dust is provided in the middle of the lower end of the settling chamber 31. An air guide plate 34 for guiding air to the settling channels 32 on both sides is provided in the settling chamber 31. The air guide plate 34 is tiltedly arranged in the settling chamber 31 to lift the flue gas introduced into the settling chamber 31 and introduce it into the settling channel 32, which is helpful for separating the flue gas particles and collecting them through the dust collecting channel 33. A spiral dust collector 35 is provided at the lower end of the dust collecting channel 33. The spiral dust collector 35 includes a spiral blade shaft and a dust exhaust motor connected to the spiral blade shaft to discharge dust from the discharge hopper of the spiral dust collector 35. A channel hole is provided at the lower end of the settling channel 32 to communicate with the lower flue gas channel 42 in the heat exchange chamber 4 through the channel hole.

[0027] The conventional lower flue gas passage 42 also collects dust particles in the flue gas. If the personnel do not clean it for a long time, the accumulated dust particles will be blown up again by the introduced flue gas flow and added into the flue gas, thereby increasing the dust content in the flue gas. In order to solve the above problem, in one embodiment, as Figure 2As shown, a plurality of groups of wind baffles 44 are distributed in the lower flue gas channel 42. The wind baffles 44 are bent triangular structures. Dust dropping slots 45 are provided between adjacent wind baffles 44 to divide the lower flue gas channel 42 into a dust collecting area and a ventilation area. The channel hole at the lower end of the sedimentation channel 32 is connected to the ventilation area to prevent dust from being raised again.

[0028] In one embodiment, Figure 2 As shown, the cleaning mechanism includes a bracket 7 installed in the upper flue gas channel 41, a cleaning shaft 71 distributed and installed at the lower end of the bracket 7, and a driving cylinder 72 for controlling the lifting and moving of the bracket 7. The driving cylinder 72 is installed at the upper end of the chassis 1. The driving cylinder 72 can be an electric cylinder or a hydraulic cylinder. The lower end of the cleaning shaft 71 is installed with a cleaning assembly inserted into the heat exchange tube 43; the cleaning assembly includes a seat sleeve 76 installed at the lower end of the cleaning shaft 71 and a first cleaning frame 73 and a second cleaning frame 74 respectively arranged on both sides of the seat sleeve 76. The first cleaning frame 73 and the second cleaning frame 74 are inserted into the heat exchange tube 43, and the first cleaning frame 73 and the second cleaning frame 74 are respectively arranged on both sides of the inner cavity of the heat exchange tube 43. The first cleaning frame 73 and the second cleaning frame 74 are respectively provided with scrapers 75, which are arranged at intervals in the vertical direction to scrape the inner wall of the heat exchange tube 43. Since there is a partition separating the areas in the upper flue gas channel 41, the cleaning mechanism can be provided with multiple heat exchange tubes 43 arranged in a distributed manner.

[0029] When the scraper 75 scrapes the inner wall of the heat exchange tube 43, if the distance between the scraper 75 and the inner wall of the heat exchange tube 43 is too large, the scraping will not be clean, and the scraper 75 and the inner wall will be worn after long-term use, which will reduce the cleaning effect. If the scraper 75 is tightly attached to the inner wall of the heat exchange tube 43, it will cause a large resistance when the scraper 75 moves up and down, affecting the lifting and lowering movement of the cleaning component. In order to solve the above technical problems, in one embodiment, as Figure 2 and Figure 5 As shown, the upper ends of the first cleaning frame 73 and the second cleaning frame 74 are elastically slidably mounted on the seat sleeve 76, and a plurality of spring-pressing members 8 are distributed between the first cleaning frame 73 and the second cleaning frame 74, so that the first cleaning frame 73 and the second cleaning frame 74 are elastically arranged, and the scrapers 75 are elastically pressed against the inner walls of the heat exchange tubes 43 respectively.

[0030] In one embodiment, Figure 6As shown, the upper ends of the first cleaning frame 73 and the second cleaning frame 74 are respectively provided with slide plates 77, and the slide plates 77 on the first cleaning frame 73 and the second cleaning frame 74 are arranged opposite to each other so as to be slidably inserted into the seat cover 76 respectively. The lower ends of the slide plates 77 of the first cleaning frame 73 and the second cleaning frame 74 are respectively provided with limit pins 78, and the corresponding limit columns on both sides of the lower end of the seat cover 76 are respectively provided with strip-shaped limit holes, and the limit pins 78 are inserted into the limit holes to prevent the slide plates 77 from detaching from the seat cover 76. The opposite ends of the slide plates 77 on both sides of the seat cover 76 are respectively provided with grooves, and first springs 79 are installed in the grooves to push the slide plates 77 on both sides to move outward.

[0031] In one embodiment, Figure 7 As shown, the elastic pressure member 8 includes a cylinder 81 installed on the first cleaning frame 73 and a rod seat 82 arranged on the second cleaning frame 74, the rod seat 82 is provided with an elastic rod 83 inserted into the cylinder 81 and slidably arranged, and the elastic rod 83 is located in the inner cavity of the cylinder 81 and is integrally connected with an elastic block 84 to prevent the elastic rod 83 from detaching from the cylinder 81, and the inner cavity of the cylinder 81 is provided with a second spring 85 that pushes the elastic block 84 to move outward, so as to elastically separate the first cleaning frame 73 and the second cleaning frame 74, so that the scrapers 75 distributed outside the first cleaning frame 73 and the second cleaning frame 74 are elastically attached to the inner wall of the heat exchange tube 43.

[0032] The upper end of the bracket 7 may also be provided with a guide rod 70 , and the chassis 1 is provided with a guide sleeve corresponding to the guide rod 70 , and the guide rod 70 is slidably inserted into the guide sleeve to improve the stability of the bracket 7 when it is lifted or lowered.

[0033] The working principle of the present invention is as follows: the combustion-supporting fan 68 ventilates the furnace body 21, and the high-temperature flue gas is connected to the settling chamber 3 through the smoke exhaust pipe 26. The settling chamber 3 is used to further remove dust particles in the flue gas. The flue gas is then introduced into the lower flue gas channel 42, and the flue gas flows in an S shape along the lower flue gas channel 42, the heat exchange tube 43 and the upper flue gas channel 41, and is finally discharged from the smoke exhaust port 11 at the upper end of the equipment room 5.

[0034] A hot air blower 51 is provided in the equipment room 5 , and the hot air blower 51 blows air into the inner cavity of the heat exchange chamber 4 , and after heat exchange with the heat exchange pipe 43 , the outer shell of the settling chamber 3 and the furnace body 21 , the hot air is finally discharged through the hot air outlet 12 .

[0035] The beneficial effects of the present invention are as follows: the present invention improves the existing fully automatic biomass hot air furnace, and an air isolation chamber 24 is provided between the improved furnace body 21 and the ash cleaning box 23, and the air isolation chamber 24 is used to prevent the combustion-supporting wind from raising the dust inside the ash cleaning box 23; the grate 22 is a basin-shaped structure, which helps the combustion-supporting wind to pass through the grate 22 from the bottom and all around, so that the combustion-supporting oxygen supply is more uniform and sufficient, and the feed hopper 61 automatically and quantitatively supplies biomass particles to the furnace body 21 through the spiral feeder 62, and the spiral feeder 62 guides the biomass particles to the guide plate 64, and uses the fan to guide the air to the blowing chamber 65 to blow the material on the guide plate 64 and throw it into the furnace body 21, which helps the biomass particles to be evenly dispersed, so that the biomass particles burn more fully, thereby reducing the incompletely burned particles in the flue gas. One side of the furnace body 21 is connected to the settling chamber 3 through the smoke exhaust pipe 26, so that the dust in the high-temperature flue gas is collected and settled by the settling chamber 3, and finally introduced into the heat exchange chamber 4. The heat exchange chamber 4 uses a wind baffle 44 to divide the lower flue gas channel 42 into a dust collection area and a ventilation area to prevent dust from being raised again, and then the inner wall of the heat exchange tube 43 is regularly scraped and cleaned by a cleaning mechanism to prevent dust from sticking and accumulating. The cleaning mechanism includes a first cleaning frame 73 and a second cleaning frame 74 that are elastically arranged. The driving cylinder 72 drives the first cleaning frame 73 and the second cleaning frame 74 that are distributed to move up and down through the bracket 7, so as to scrape the inner wall of the heat exchange tube 43 with a scraper 75. The present invention improves various factors that generate flue gas dust, reduces the dust content in the flue gas generated by the fully automatic biomass hot air furnace, avoids pipeline blockage, improves heat exchange efficiency, and also provides convenience for subsequent flue gas treatment.

[0036] The above shows and describes the basic principle and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents. It should be noted that, in this article, if there are relational terms such as first and second, it is only used to distinguish one entity or operation from another entity or operation, and does not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the term "includes", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

Claims

1. A fully automatic biomass hot air furnace, comprising a housing (1) and a combustion chamber (2), a settling chamber (3), a heat exchange chamber (4) and an equipment chamber (5) arranged in sequence in the housing (1); a furnace body (21) for burning biomass fuel is arranged in the combustion chamber (2); a control chamber (6) for feeding and supplying air to the furnace body (21) is arranged on one side of the combustion chamber (2); a grate (22) for stacking biomass fuel is arranged in the furnace body (21); and a dust cleaning box (23) is arranged at the lower end of the furnace body (21), characterized in that: An air isolation chamber (24) is provided between the grate (22) and the ash cleaning box (23); an air inlet pipe (25) is provided on one side of the air isolation chamber (24), and the air inlet pipe (25) is connected to a combustion-supporting fan (68) in the control room (6); one side of the furnace body (21) is connected to the settling chamber (3) through a smoke exhaust pipe (26), so as to further reduce dust in the smoke by using the settling chamber (3); the heat exchange chamber (4) comprises an upper smoke channel (41), a lower smoke channel (42), and heat exchange tubes (43) distributed and installed between the upper smoke channel (41) and the lower smoke channel (42); a cleaning mechanism for cleaning dust sticking to the inner wall of the heat exchange tube (43) is provided at the upper end of the chassis (1) corresponding to the heat exchange tube (43).

2. The fully automatic biomass hot air stove according to claim 1 is characterized in that: The wind-proof chamber (24) includes a first cylindrical chamber and a second chamber connected to the first chamber in an integral manner. The second chamber is a conical structure. The air inlet pipe (25) is arranged on one side of the first chamber and is arranged along a tangent to the inner wall of the first chamber so that the air flow introduced into the wind-proof chamber (24) swirls in its stroke. The lower end of the second chamber is connected to the cleaning box (23) through a cleaning port, and a conical wind shield (27) is provided at the upper end of the cleaning port.

3. The fully automatic biomass hot air stove according to claim 2 is characterized in that: The grate (22) is a basin-shaped structure, the lower end of the grate (22) is inserted into the windproof chamber (24), and the side and bottom of the grate (22) are respectively provided with openings so that the cyclone in the windproof chamber (24) is guided from the side and bottom openings to the upper end of the grate (22).

4. The fully automatic biomass hot air stove according to claim 1 is characterized in that: A feed hopper (61) is provided at the upper end of the control chamber (6), and a screw feeder (62) is connected to the lower end of the feed hopper (61). The discharge end of the screw feeder (62) is in communication with a guide hole (63) on one side of the furnace body (21) so as to quantitatively feed materials into the guide hole (63). An inclined guide plate (64) is provided on the guide hole (63) so as to receive biomass particles discharged from the screw feeder (62). A blowing chamber (65) is provided at the lower end of the guide plate (64). A plurality of blowing holes (66) in communication with the blowing chamber (65) are distributed on the guide plate (64). An air supply pipe (67) is connected to the outer end of the blowing chamber (65). The air supply pipe (67) is connected to a combustion-supporting fan (68) so as to supply air to the blowing chamber (65) so as to blow particles falling onto the guide plate (64) upward and scatter them.

5. The fully automatic biomass hot air stove according to claim 1 is characterized in that: The settling chamber (3) comprises a settling chamber (31) and settling channels (32) arranged on both sides of the settling chamber (31); a dust collecting channel (33) for collecting dust is arranged at the middle of the lower end of the settling chamber (31); a wind guide plate (34) for guiding air to the settling channels (32) on both sides is arranged in the settling chamber (31); the wind guide plate (34) is arranged obliquely in the settling chamber (31) so as to lift the smoke introduced into the settling chamber (31) and introduce it into the settling channel (32); a spiral dust collector (35) is arranged at the lower end of the dust collecting channel (33); the spiral dust collector (35) comprises a spiral blade shaft and a dust exhaust motor drivingly connected to the spiral blade shaft so as to discharge dust from a discharge hopper of the spiral dust collector (35); and a channel hole is arranged at the lower end of the settling channel (32) so as to communicate with a lower smoke channel (42) in the heat exchange chamber (4) through the channel hole.

6. The fully automatic biomass hot air stove according to claim 5 is characterized in that: A plurality of groups of wind baffles (44) are distributed in the lower flue gas channel (42); the wind baffles (44) are bent triangular structures; ash falling notches (45) are provided between adjacent wind baffles (44) to divide the lower flue gas channel (42) into a dust collection area and a ventilation area.

7. The fully automatic biomass hot air stove according to claim 1 is characterized in that: The cleaning mechanism comprises a bracket (7) installed in the upper flue gas passage (41), a cleaning shaft (71) installed at the lower end of the bracket (7), and a driving cylinder (72) for controlling the lifting and movement of the bracket (7); the driving cylinder (72) is installed at the upper end of the chassis (1); the driving cylinder (72) may be an electric cylinder or a hydraulic cylinder; a cleaning component inserted into the heat exchange tube (43) is installed at the lower end of the cleaning shaft (71); the cleaning component comprises a seat sleeve (76) installed at the lower end of the cleaning shaft (71) and a plurality of cleaning components respectively arranged on the cleaning shaft (71) and the ... A first cleaning rack (73) and a second cleaning rack (74) are arranged on both sides of the seat cover (76); the first cleaning rack (73) and the second cleaning rack (74) are inserted into the heat exchange tube (43); and the first cleaning rack (73) and the second cleaning rack (74) are respectively arranged on both sides of the inner cavity of the heat exchange tube (43); and the first cleaning rack (73) and the second cleaning rack (74) are respectively provided with scrapers (75); the scrapers (75) are arranged at intervals in a vertical direction to scrape the inner wall of the heat exchange tube (43).

8. The fully automatic biomass hot air stove according to claim 7 is characterized in that: The upper ends of the first cleaning frame (73) and the second cleaning frame (74) are elastically slidably mounted on the seat cover (76), and a plurality of spring-pressing members (8) are distributed between the first cleaning frame (73) and the second cleaning frame (74), so that the first cleaning frame (73) and the second cleaning frame (74) are elastically arranged between them, and the scrapers (75) are elastically pressed against the inner walls of the heat exchange tubes (43).

9. The fully automatic biomass hot air stove according to claim 8, characterized in that: The upper ends of the first cleaning frame (73) and the second cleaning frame (74) are respectively provided with a slide plate (77), and the slide plates (77) on the first cleaning frame (73) and the second cleaning frame (74) are arranged facing each other so as to be slidably inserted into the seat cover (76), and the lower ends of the slide plates (77) of the first cleaning frame (73) and the second cleaning frame (74) are respectively provided with a limit pin (78), and the lower ends of the seat cover (76) are respectively provided with a strip-shaped limit hole corresponding to the limit column on both sides of the lower end, and the limit pin (78) is inserted into the limit hole to prevent the slide plate (77) from being separated from the seat cover (76), and the slide plates (77) on both sides of the seat cover (76) are respectively provided with grooves at the opposite ends thereof, and first springs (79) are installed in the grooves to push the slide plates (77) on both sides to move outward.

10. The fully automatic biomass hot air stove according to claim 8, characterized in that: The elastic member (8) comprises a cylinder (81) mounted on the first cleaning frame (73) and a rod seat (82) arranged on the second cleaning frame (74); the rod seat (82) is provided with an elastic rod (83) inserted into the cylinder (81) and slidably arranged therein; the elastic rod (83) is located in the inner cavity of the cylinder (81) and is integrally connected with an elastic block (84); a second spring (85) is provided in the inner cavity of the cylinder (81) for pushing the elastic block (84) to move outward, so as to elastically separate the first cleaning frame (73) and the second cleaning frame (74), so that the scrapers (75) arranged outside the first cleaning frame (73) and the second cleaning frame (74) are elastically attached to the inner wall of the heat exchange tube (43).

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