A dual-temperature adjustable ultra-high temperature hot air furnace

Abstract

The present invention relates to the technical field of hot blast furnaces, and specifically belongs to a dual-temperature adjustable ultra-high temperature hot blast furnace. It includes a furnace body and an air regulating mechanism, and the furnace body includes a furnace liner, a furnace middle liner and a furnace shell from the inside to the outside in sequence, and the furnace liner includes an upper air dividing cavity at the top and a lower air dividing cavity at the bottom, and the upper air dividing cavity is divided into more than two upper air chambers by an upper air dividing plate, and the lower air dividing cavity is divided into more than two lower air chambers by a lower air dividing plate, and the upper air chamber and the corresponding lower air chamber are connected in sequence through pipe columns to form a directional heating air duct; the lower part of the furnace middle liner is sleeved with a furnace middle liner shell to form a closed middle liner interlayer, and the furnace shell is vertically and parallelly arranged with a first air trough, a second air trough and a third air trough, and the air regulating mechanism includes an air volume regulating plate and a rotating mechanism for rotating the air volume regulating plate; the hot blast furnace of the present invention has a compact structure, and compared with hot blast furnaces of the same level, the heating area and the length of the heating line are about 3 times that of the current domestic furnaces of the same type.

Description

Technical Field

[0001] The invention relates to the technical field of hot blast furnaces, which are used for providing heat temperature requirements in a tea making process, and specifically belong to a dual-temperature adjustable ultra-high temperature hot blast furnace. Background Art

[0002] In the process of tea making, hot air furnaces are usually used as heat sources. The thermal energy efficiency and energy consumption of hot air furnaces are particularly important. In order to save costs, the fuels used by hot air furnaces include firewood, coal, combustible biomass fuels, etc. The temperature conditions required for tea withering are generally 280 ~ 350 ℃ (high temperature), and the temperature conditions required for drying are generally 80 ~ 160 ℃ (low temperature). Common hot air furnaces are generally divided into single-stage internal combustion and single-stage external combustion. They are large in size, high in energy consumption, and low in thermal efficiency. Generally, the thermal efficiency is about 50%, and it is difficult to output hot air at a higher temperature;

[0003] Usually, a process requires a hot air furnace, which not only wastes a lot of manpower, makes the temperature difficult to control, but also consumes a lot of energy. Summary of the invention

[0004] In order to solve the problems of low thermal efficiency, low and difficult to control output air temperature, high energy consumption and manpower waste in the existing hot blast furnace, the present invention provides a dual-temperature adjustable ultra-high temperature hot blast furnace, and the specific technical scheme is as follows:

[0005] A dual-temperature adjustable ultra-high temperature hot blast furnace, comprising a furnace body and an air regulating mechanism 1, a furnace cover 2 is arranged at the upper end of the furnace body, a chimney is arranged through the middle of the furnace cover 2, and a furnace bottom box 3 with supporting legs is arranged at the lower end of the furnace body;

[0006] The furnace body includes a furnace inner tank 4, a furnace middle tank 5 and a furnace shell 6 from the inside to the outside, the furnace middle tank 5 and the furnace shell 6 are separated to form a wind chamber, the bottom end of the furnace middle tank 5 is provided with a furnace bottom plate, the furnace bottom plate and the bottom end of the furnace inner tank 4 are separated to form a combustion chamber, and a charging port channel 71 is penetrated through the furnace body corresponding to the combustion chamber;

[0007] A high-temperature air outlet passage 72 is provided through the upper portion of the furnace body;

[0008] The furnace liner 4 is a three-dimensional heating core structure, and includes an upper air dividing cavity 41 at the top and a lower air dividing cavity 42 at the bottom. The upper air dividing cavity 41 is divided into more than two upper air chambers by an upper air dividing plate 411, and the lower air dividing cavity 42 is divided into more than two lower air chambers by a lower air dividing plate 421, and the upper air chambers and the corresponding lower air chambers are sequentially connected through a pipe column 43 to form a directional heating air duct; a cylindrical cavity is vertically penetrated through the middle of the lower air dividing cavity 42 to form a flame guide tube 44;

[0009] The lower part of the furnace 5 is covered with a furnace shell 51 to form a closed middle layer, and a wide slit is opened in the axial direction of the furnace shell 51;

[0010] The furnace shell 6 is vertically and parallelly provided with a first air slot 61, a second air slot 62 and a third air slot 63, and a partition plate I 65 between the first air slot 61 and the second air slot 62 and a partition plate II 651 between the second air slot 64 and the third air slot 63 respectively separate the air chambers; the first air slot 61 and the second air slot 62 are respectively connected to the middle tank interlayer through the wide slit, and the second air slot 62 is connected to the furnace tank 4 through a rectangular air duct 66;

[0011] The air regulating mechanism 1 includes an air volume regulating plate 11 and a rotating mechanism for rotating the air volume regulating plate 11. The furnace shell 6 is provided with a temperature regulating air outlet 67 corresponding to the first air slot 61 and the second air slot 62. The air volume regulating plate 11 is correspondingly covered on the temperature regulating air outlet 67. Rotating the air volume regulating plate 11 can adjust the air volume of the first air slot 61 and the second air slot 62 passing through the temperature regulating air outlet 67.

[0012] During operation, the large fan 8 blows air toward the third wind slot 63 through the fan connecting pipe 81. The wind passes through the upper part of the wind chamber in sequence, enters the middle tank interlayer through the first wind slot 61 and the wide gap, enters the second wind slot 62 through the wide gap, enters the furnace tank 4 through the rectangular air duct 66, and finally discharges the high-temperature hot air through the high-temperature air outlet channel 72. During the process, the air volume adjustment plate 11 can be rotated to adjust the air outlet temperature of the temperature-adjusting air outlet 67.

[0013] Furthermore, the upper air chamber 41 and the lower air chamber 42 are both flat square boxes, and pipe columns 43 are evenly arranged between the upper air chamber 41 and the lower air chamber 42 to form a pipe column group;

[0014] The upper air chamber 41 is divided into three upper air chambers by a T-shaped upper air dividing plate 411, namely a first upper air chamber 412, a second upper air chamber 413 and a third upper air chamber 414; the lower air chamber 42 is divided into two lower air chambers by a rectangular lower air dividing plate 421, namely a first lower air chamber 422 and a second lower air chamber 423, and air chamber heat sinks are evenly arranged in the lower air chamber 42 parallel to the lower air dividing plate 421, and the vertical plates of the lower air dividing plate 411 and the T-shaped upper air dividing plate 421 are parallel, so that the wind in the air chamber enters the first upper air chamber 412 through the rectangular air duct 66, and then passes through the first lower air chamber 422, the second upper air chamber 413, the second lower air chamber 423 and the third upper air chamber 414 in sequence through the corresponding pipe column 43, and is finally discharged from the high-temperature air outlet channel 72.

[0015] Further, the furnace bottom box 3 is a combustion-supporting chamber of the hot blast furnace, and a drawer-type exhaust-aiding duct mechanism is provided in the furnace bottom box 3. The multi-exhaust duct mechanism includes an air inlet duct 31 and more than 4 air outlet ducts 32 arranged in parallel at equal intervals. One end of each air outlet duct 32 is open and the other end is closed, and the open end is connected to the air inlet duct 31, and the air inlet duct 31 is connected to a small fan 9;

[0016] The furnace bottom plate 51 is a horizontally arranged square plate with a mounting hole in the middle thereof and a grate 52 mounted thereon. Vertical bottom plate air inlet pipes 53 are evenly arranged on the square plates around the mounting hole, and air inlet holes are provided on the furnace bottom plate corresponding to the bottom plate air inlet pipes 53.

[0017] Furthermore, horizontal heat sinks 54 are evenly distributed on the outer side wall of the furnace 5 corresponding to the middle layer.

[0018] Furthermore, the air volume regulating mechanism 1 further comprises a square box body 12 with one side open, an air outlet pipe 13 is arranged on one side of the square box body 12, and the open side of the square box body 12 corresponds to the temperature regulating air outlet 67 of the furnace shell 6;

[0019] The temperature regulating air outlet 67 is circular, and the air volume regulating plate 11 is a semicircular plate. The semicircular plate cooperates to cover half of the temperature regulating air outlet 67 and can rotate around the center of the temperature regulating air outlet 67 through a rotating mechanism.

[0020] Further, the rotating mechanism includes a rotating shaft 14, one end of which is connected to the center of the air volume adjustment plate 11, and the other end extends out of the square box body 12, and the rotating shaft 14 located in the square box body 12 is sleeved with a compression spring 15, one end of the compression spring 15 is in contact with the air volume adjustment plate 11, and the other end is in contact with the corresponding side wall of the square box body 12 through a spring fixing sealing sheet;

[0021] The rotating shaft 14 outside the square box body 12 is sleeved with a guide sleeve 16 and an adjustment handle 17 is provided at the free end. The guide sleeve 16 is fixedly connected to the side wall of the square box body 12 corresponding to one end of the square box body 12, and a locking handle 18 is provided through the guide sleeve 16 and the corresponding rotating shaft 14.

[0022] Further, the furnace cover 2 includes an inner furnace cover 21, an outer furnace cover 22 and a furnace cover bottom plate 23. The inner furnace cover 21 and the outer furnace cover 22 are spaced apart to form a furnace cover air chamber. The furnace cover bottom plate 23 is used to seal the bottom end of the furnace cover air chamber. The furnace cover bottom plate 23 is respectively connected to the upper ends of the first air trough 61 and the second air trough 62.

[0023] The furnace cover air chamber is provided with an inverted L-shaped first furnace cover partition 24 at the position corresponding to the partition Ⅰ65, and a second furnace cover partition 25 is provided on the upper part of the furnace cover air chamber on the opposite side of the first furnace cover partition 24, so that the outlet air from the upper end of the first air duct 61 bypasses the furnace cover air chamber and then enters the second air duct 62.

[0024] The beneficial technical effects of the present invention are as follows:

[0025] (1) The hot air furnace of the present invention can be used for multiple purposes. It is provided with two hot air outlets, namely a high-temperature air outlet channel and a temperature-adjusting air outlet. The air temperature discharged from the high-temperature air outlet can reach above 400°C. The temperature-adjusting air outlet can adjust the air volume of the first air slot and the second air slot through the temperature-adjusting air outlet through an adjusting mechanism, thereby achieving the purpose of adjusting the air temperature output from the temperature-adjusting air outlet. When the air outlet requirement is met, the air volume adjusting plate can be locked by a locking handle; therefore, a variety of air temperatures can be output to meet various heating temperature requirements in the tea making process.

[0026] (2) The furnace body of the present invention includes a furnace liner, a furnace middle liner and a furnace shell from the inside to the outside. The air discharged by the large fan passes through the wind chamber between the furnace middle liner and the furnace shell, the middle liner interlayer and the furnace liner in sequence. At the same time, the furnace liner is a three-dimensional heating core structure, and includes an upper air chamber and a lower air chamber at the bottom. The upper air chamber is divided into more than two upper air chambers by an upper air chamber plate, and the lower air chamber is divided into more than two lower air chambers by a lower air chamber plate. The upper air chamber and the corresponding lower air chamber are connected in sequence through pipe columns to form a directional heating air duct, which has high heat absorption efficiency, greatly improves the thermal efficiency of the hot air furnace of the present invention, and reduces energy consumption;

[0027] At the same time, the air duct runs through the entire furnace body. When working, the highest temperature of each part of the furnace body (excluding the grate) is only about 80℃ higher than the highest output air temperature. Compared with hot air furnaces of the same level, the heating area and heating line length are about 3 times that of the current domestic furnaces of the same type.

[0028] (3) When the hot blast furnace of the present invention is in operation, the fuel in the combustion chamber burns, and the flame directly heats the lower air chamber of the furnace inner shell. Part of the flame is introduced into the middle part of the furnace inner shell through the flame guide pipe and spreads evenly from the inside to the outside. Therefore, the flame distribution range in the furnace is wide and uniform, acting on the outer surfaces of all the pipe columns, so that the surface of each pipe column can be evenly heated by the flame, thereby increasing the flame heating area and greatly improving the heating efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic structural diagram of a high-efficiency hot blast stove of the present invention.

[0030] Figure 2 It is an exploded view of the furnace body of the present invention.

[0031] Figure 3 It is a structural schematic diagram of the air regulating mechanism of the present invention.

[0032] Figure 4 It is a structural schematic diagram of the exhaust duct mechanism of the present invention.

[0033] Figure 5It is a cross-sectional view of the furnace cover of the present invention.

[0034] Figure 6 It is a structural schematic diagram of the furnace shell of the present invention.

[0035] Figure 7 It is a schematic structural diagram of the furnace core of the present invention.

[0036] Figure 8 It is a schematic structural diagram of the furnace inner container of the present invention.

[0037] Fig. 9 This is a diagram showing the use status of the high-efficiency hot blast stove of the present invention.

[0038] Fig.10 It is a cross-sectional view of the upper air chamber of the present invention.

[0039] Fig.11 It is a cross-sectional view of the lower air chamber of the present invention.

[0040] Fig.12 It is a structural schematic diagram of the air regulating mechanism of the present invention.

[0041] Fig.13 It is a wind direction path diagram of the primary heating air duct of the present invention.

[0042] Fig.14 It is a wind direction path diagram of the secondary heating air duct and the directional heating air duct of the present invention.

[0043] Fig.15 It is a wind direction path diagram in the furnace cover of the present invention.

[0044] Among them: 1 air adjustment mechanism, 11 air volume adjustment plate, 12 square box body, 13 air adjustment outlet pipe, 14 rotating shaft, 15 compression spring, 16 guide sleeve, 17 adjustment handle, 18 locking handle, 2 furnace cover, 21 furnace inner cover, 22 furnace outer cover, 23 furnace cover bottom plate, 24 first furnace cover partition, 25 second furnace cover partition, 3 furnace bottom box, 31 air inlet pipe, 32 air outlet pipe, 4 furnace liner, 41 upper air cavity, 42 lower air cavity, 411 upper air plate, 421 lower air plate, 43 pipe column, 44 flame guide Tube, 412 first upper wind chamber, 413 second upper wind chamber, 414 third upper wind chamber, 422 first lower wind chamber, 423 second lower wind chamber, 5 furnace center, 51 furnace center shell, 52 grate, 53 bottom plate air inlet pipe, 54 heat sink, 6 furnace shell, 61 first air trough, 62 second air trough, 63 third air trough, 65 partition I, 651 partition II, 66 rectangular air duct, 67 temperature regulating air outlet, 71 charging port channel, 72 high temperature air outlet channel, 8 large fan, 81 fan connecting pipe, 9 small fan. DETAILED DESCRIPTION

[0045] To make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific implementation methods described herein are only used to explain the present invention and are not intended to limit the present invention. Example

[0046] See Figure 1-2 A dual-temperature adjustable ultra-high temperature hot blast furnace comprises a furnace body and an air regulating mechanism 1, a furnace cover 2 is arranged at the upper end of the furnace body, a chimney is arranged through the middle of the furnace cover 2, and a furnace bottom box 3 with supporting legs is arranged at the lower end of the furnace body;

[0047] The furnace body includes a furnace inner tank 4, a furnace middle tank 5 and a furnace shell 6 from the inside to the outside, the furnace middle tank 5 and the furnace shell 6 are separated to form a wind chamber, the bottom end of the furnace middle tank 5 is provided with a furnace bottom plate, the furnace bottom plate and the bottom end of the furnace inner tank 4 are separated to form a combustion chamber, and a charging port channel 71 is penetrated through the furnace body corresponding to the combustion chamber;

[0048] A high-temperature air outlet passage 72 is provided through the upper portion of the furnace body;

[0049] See Figure 8 The furnace liner 4 is a three-dimensional heating core structure, and includes an upper air dividing cavity 41 at the top and a lower air dividing cavity 42 at the bottom. The upper air dividing cavity 41 is divided into more than two upper air chambers by an upper air dividing plate 411, and the lower air dividing cavity 42 is divided into more than two lower air chambers by a lower air dividing plate 421, and the upper air chambers and the corresponding lower air chambers are sequentially connected through a pipe column 43 to form a directional heating air duct; a cylindrical cavity is vertically penetrated through the middle of the lower air dividing cavity 42 to form a flame guide tube 44;

[0050] See Figure 7 The lower part of the furnace 5 is covered with a furnace shell 51 to form a closed middle layer, and a wide slit is opened in the axial direction of the furnace shell 51;

[0051] See Figure 6 The furnace shell 6 is vertically and parallelly provided with a first wind slot 61, a second wind slot 62 and a third wind slot 63, and a partition plate I 65 between the first wind slot 61 and the second wind slot 62 and a partition plate II 651 between the second wind slot 64 and the third wind slot 63 respectively separate the wind chambers; the first wind slot 61 and the second wind slot 62 are respectively connected to the middle tank interlayer through the wide slit, and the second wind slot 62 is connected to the furnace tank 4 through a rectangular air duct 66;

[0052] The air regulating mechanism 1 includes an air volume regulating plate 11 and a rotating mechanism for rotating the air volume regulating plate 11. The furnace shell 6 is provided with a temperature regulating air outlet 67 corresponding to the first air slot 61 and the second air slot 62. The air volume regulating plate 11 is correspondingly covered on the temperature regulating air outlet 67. Rotating the air volume regulating plate 11 can adjust the air volume of the first air slot 61 and the second air slot 62 passing through the temperature regulating air outlet 67.

[0053] See Fig. 9 When working, the large fan 8 blows air to the third wind slot 63 through the fan connecting pipe 81, and the wind passes through the upper part of the wind chamber, enters the middle tank interlayer through the first wind slot 61 and the wide gap, enters the second wind slot 62 through the wide gap, enters the furnace tank 4 through the rectangular air duct 66, and finally discharges the high-temperature hot air through the high-temperature air outlet channel 72. During the process, the air volume adjustment plate 11 can be rotated to adjust the air outlet temperature of the temperature-adjusting air outlet 67.

[0054] See Figure 10~Figure 11 The upper air chamber 41 and the lower air chamber 42 are both flat square boxes, and pipe columns 43 are evenly arranged between the upper air chamber 41 and the lower air chamber 42 to form a pipe column group;

[0055] The upper air chamber 41 is divided into three upper air chambers by a T-shaped upper air dividing plate 411, namely a first upper air chamber 412, a second upper air chamber 413 and a third upper air chamber 414; the lower air chamber 42 is divided into two lower air chambers by a rectangular lower air dividing plate 421, namely a first lower air chamber 422 and a second lower air chamber 423, and air chamber heat sinks are evenly arranged in the lower air chamber 42 parallel to the lower air dividing plate 421, and the vertical plates of the lower air dividing plate 411 and the T-shaped upper air dividing plate 421 are parallel, so that the wind in the air chamber enters the first upper air chamber 412 through the rectangular air duct 66, and then passes through the first lower air chamber 422, the second upper air chamber 413, the second lower air chamber 423 and the third upper air chamber 414 in sequence through the corresponding pipe column 43, and is finally discharged from the high-temperature air outlet channel 72.

[0056] The furnace bottom box 3 is a combustion-supporting chamber of the hot blast furnace, and a drawer-type exhaust-supporting duct mechanism is arranged in the furnace bottom box 3.

[0057] See Figure 4 The multi-row air duct mechanism includes an air inlet duct 31 and more than four air outlet ducts 32 arranged in parallel at equal intervals, one end of each air outlet duct 32 is open and the other end is closed, and the open end is connected to the air inlet duct 31, and the air inlet duct 31 is connected to a small fan 9;

[0058] The furnace bottom plate 51 is a horizontally arranged square plate with a mounting hole in the middle thereof and a grate 52 mounted thereon. Vertical bottom plate air inlet pipes 53 are evenly arranged on the square plates around the mounting hole, and air inlet holes are provided on the furnace bottom plate corresponding to the bottom plate air inlet pipes 53.

[0059] Horizontal heat sinks 54 are evenly arranged on the outer wall of the furnace 5 corresponding to the middle layer, so as to increase the heat absorption area.

[0060] The air volume regulating mechanism 1 further comprises a square box body 12 with one side open, an air outlet pipe 13 is arranged on one side of the square box body 12, and the open side of the square box body 12 corresponds to the temperature regulating air outlet 67 of the furnace shell 6;

[0061] The temperature regulating air outlet 67 is circular, and the air volume regulating plate 11 is a semicircular plate. The semicircular plate cooperates to cover half of the temperature regulating air outlet 67 and can rotate around the center of the temperature regulating air outlet 67 through a rotating mechanism.

[0062] See Fig.12 and Figure 3 The rotating mechanism includes a rotating shaft 14, one end of which is connected to the center of the air volume adjustment plate 11, and the other end extends out of the square box body 12, and the rotating shaft 14 located in the square box body 12 is sleeved with a compression spring 15, one end of the compression spring 15 is in contact with the air volume adjustment plate 11, and the other end is in contact with the corresponding side wall of the square box body 12 through a spring fixing sealing sheet, and the air volume adjustment plate 11 is tightly fitted to the temperature regulating air outlet 67 through the compression spring 15.

[0063] The rotating shaft 14 outside the square box body 12 is sleeved with a guide sleeve 16 and an adjustment handle 17 is provided at the free end. The guide sleeve 16 is fixedly connected to the side wall of the square box body 12 corresponding to one end of the square box body 12, and a locking handle 18 is provided through the guide sleeve 16 and the corresponding rotating shaft 14.

[0064] By turning the adjustment handle 17, the air temperature adjustment plate 11 is driven to rotate, and the size of the cross-sectional area of ​​the semicircular air temperature adjustment plate 11 covering the temperature adjustment air outlet 67 is changed, thereby controlling the size of the air outlet of the first air slot 61 and the second air slot 62, so as to achieve the purpose of outputting air temperature of the temperature adjustment air outlet 67. When the air outlet requirements are met, the air volume adjustment plate 11 can be locked by the locking handle 18.

[0065] The furnace cover 2 includes an inner furnace cover 21, an outer furnace cover 22 and a furnace cover bottom plate 23. The inner furnace cover 21 and the outer furnace cover 22 are spaced apart to form a furnace cover air chamber. The furnace cover bottom plate 23 is used to seal the bottom end of the furnace cover air chamber. The furnace cover bottom plate 23 is connected to the upper ends of the first air duct 61 and the second air duct 62 respectively.

[0066] See Figure 5 A first inverted L-shaped furnace cover partition 24 is provided at the furnace cover air chamber corresponding to the partition Ⅰ65, and a second furnace cover partition 25 is provided at the upper part of the furnace cover air chamber on the opposite side of the first furnace cover partition 24, so that the outlet air from the upper end of the first air duct 61 bypasses the furnace cover air chamber and enters the second air duct 62.

[0067] See Fig.15A furnace cover air duct is formed in the furnace cover 2 , and both ends of the furnace cover air duct are respectively connected to the upper ends of the first air trough 61 and the second air trough 62 , which increases the heat absorption area and reduces the temperature of the furnace cover 2 .

[0068] The working principle of the hot blast furnace of the present invention and the hot blast heating process are as follows: Figure 13~Figure 14 The furnace body of the hot blast furnace of the present invention is designed to form two heating air ducts, wherein the first heating air duct is the air chamber formed between the furnace shell 6 and the furnace 5, and the second heating air duct is the middle liner interlayer, and the middle liner interlayer is provided with a heat sink 54;

[0069] The cold air output by the large fan 8 enters the primary heating air duct through the first air slot 61 and flows, absorbing the heat from the furnace shell 6 and the surface of the furnace 5. After the first heating, the cold air flows into the middle duct interlayer through the wide slit and enters the secondary heating air duct. The flow direction is opposite to that in the primary heating air duct, and the heat from the surface of the furnace 5 is absorbed again.

[0070] After the second heating is completed, the air enters the furnace liner 4 through the rectangular air duct 66. The furnace liner 4 includes an upper air chamber 41 at the top and a lower air chamber 42 at the bottom. The upper air chamber 41 is divided into more than two upper air chambers by an upper air chamber plate 411, and the lower air chamber 42 is divided into more than two lower air chambers by a lower air chamber plate 421. The upper air chambers and the corresponding lower air chambers are connected in sequence through the pipe column 43 to form a directional heating air duct.

[0071] The furnace bottom plate at the bottom of the furnace 5 and the bottom of the furnace 4 form a combustion chamber. Fuel burns in the combustion chamber, and the flame directly heats the lower air chamber 42 of the furnace 4. Part of the flame is introduced into the middle part of the furnace 4 through the flame guide pipe 44 and spreads evenly from the inside to the outside. Therefore, the flame distribution range in the furnace is wide and uniform, acting on the outer surfaces of all the pipe columns 43, so that the surface of each pipe column 43 can be evenly heated by the flame, which increases the flame heating area and greatly improves the heating efficiency.

[0072] The hot air in the furnace liner 4 of the heating core structure passes through the path of: the first upper air chamber 412 → the pipe column 43 → the first lower air chamber 422 → the pipe column 43 → the second upper air chamber 413 → the pipe column 43 → the second lower air chamber 423 → the pipe column 43 → the third upper air chamber 414, and finally outputs from the high-temperature air outlet channel 72. The hot air passes through the lower air distribution cavity 42 twice and enters the corresponding pipe column 43 four times, realizing the six-stage high-temperature heating process of the air flow in the furnace liner. In particular, the lower air distribution cavity 42 is evenly provided with air cavity heat sinks that are consistent with the lower air distribution plate 421, that is, the hot air flow direction, which greatly improves the heat absorption efficiency.

[0073] The ultra-high temperature hot air is outputted through the high temperature air outlet channel 72. By controlling the working state of the small fan, the high temperature outlet air temperature can be precisely controlled.

[0074] The air volume adjustment plate 11 of the air regulating mechanism 1 of the present invention covers half of the temperature regulating air outlet 67 and can change the air volume of the first air slot 61 and the second air slot 62 through the temperature regulating air outlet 67 by rotating around the center of the temperature regulating air outlet 67. Without changing the air volume, the low-temperature and high-temperature hot air are combined into medium-temperature hot air and output through the air regulating outlet pipe 13.

[0075] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A dual-temperature adjustable ultra-high temperature hot air furnace, comprising a furnace body and an air regulating mechanism (1), wherein a furnace cover (2) is provided at the upper end of the furnace body, a chimney is provided through the middle of the furnace cover (2), and a furnace bottom box (3) with supporting legs is provided at the lower end of the furnace body; The furnace body comprises, from the inside to the outside, a furnace inner container (4), a furnace middle container (5) and a furnace shell (6); the furnace middle container (5) and the furnace shell (6) are separated to form a wind chamber; a furnace bottom plate is arranged at the bottom end of the furnace middle container (5); the furnace bottom plate and the bottom end of the furnace inner container (4) are separated to form a combustion chamber; a charging port channel (71) is penetrated through the furnace body corresponding to the combustion chamber; A high-temperature air outlet passage (72) is provided through the upper portion of the furnace body; Features: The furnace liner (4) is a three-dimensional heating core structure, and comprises an upper air division cavity (41) at the top and a lower air division cavity (42) at the bottom, wherein the upper air division cavity (41) is divided into two or more upper air chambers by an upper air division plate (411), and the lower air division cavity (42) is divided into two or more lower air chambers by a lower air division plate (421), and the upper air chambers and the corresponding lower air chambers are sequentially connected through a pipe column (43) to form a directional heating air duct; a cylindrical cavity is vertically penetrated through the middle of the lower air division cavity (42) to serve as a flame guide tube (44); The lower part of the furnace liner (5) is sleeved with a furnace liner outer shell (51) to form a closed middle liner interlayer, and a wide slit is axially penetrated through the furnace liner outer shell (51); A first wind slot (61), a second wind slot (62) and a third wind slot (63) are arranged vertically and in parallel on the furnace shell (6); a partition plate I (65) between the first wind slot (61) and the second wind slot (62) and a partition plate II (651) between the second wind slot (62) and the third wind slot (63) respectively separate the wind chambers; the first wind slot (61) and the second wind slot (62) are respectively connected to the middle tank interlayer through the wide slit, and the second wind slot (62) is connected to the furnace tank (4) through a rectangular air duct (66); The air regulating mechanism (1) comprises an air volume regulating plate (11) and a rotating mechanism for rotating the air volume regulating plate (11); temperature regulating air outlets (67) are provided on the furnace shell (6) corresponding to the first air slot (61) and the second air slot (62); the air volume regulating plate (11) is correspondingly covered on the temperature regulating air outlets (67); and the air volume regulating plate (11) can be rotated to adjust the air volume of the first air slot (61) and the second air slot (62) passing through the temperature regulating air outlets (67); The upper air division cavity (41) and the lower air division cavity (42) are both flat square boxes, and pipe columns (43) are evenly arranged between the upper air division cavity (41) and the lower air division cavity (42) to form a pipe column group; The upper air dividing chamber (41) is divided into three upper air chambers by a T-shaped upper air dividing plate (411), namely a first upper air chamber (412), a second upper air chamber (413) and a third upper air chamber (414); the lower air dividing chamber (42) is divided into two lower air chambers by a rectangular lower air dividing plate (421), namely a first lower air chamber (422) and a second lower air chamber (423); and the lower air dividing chamber (42) is parallel to the lower air dividing plate (421). Wind cavity heat sinks are evenly distributed, and the vertical plates of the lower air distribution plate (421) and the T-shaped upper air distribution plate (411) are parallel, so that the wind in the air chamber enters the first upper air chamber (412) through the rectangular air duct (66), and then passes through the first lower air chamber (422), the second upper air chamber (413), the second lower air chamber (423) and the third upper air chamber (414) in sequence through the corresponding pipe column (43), and finally is discharged from the high-temperature air outlet channel (72); The air regulating mechanism (1) further comprises a square box body (12) with one side open, an air regulating air outlet pipe (13) being provided on one side of the square box body (12), and the open side of the square box body (12) corresponds to the temperature regulating air outlet (67) of the furnace shell (6); The temperature-adjusting air outlet (67) is circular, and the air volume regulating plate (11) is a semicircular plate, which cooperates with the cover to cover half of the temperature-adjusting air outlet (67) and can rotate around the center of the temperature-adjusting air outlet (67) through a rotating mechanism; When in operation, the large fan (8) blows air toward the third air slot (63) through the fan connecting pipe (81), and the air sequentially passes through the upper part of the air chamber, enters the middle tank interlayer through the first air slot (61) and the wide slit, enters the second air slot (62) through the wide slit, enters the furnace tank (4) through the rectangular air duct (66), and finally discharges high-temperature hot air through the high-temperature air outlet channel (72). During the process, the air volume adjustment plate (11) can be rotated to adjust the air outlet temperature of the temperature-adjusting air outlet (67).

2. According to claim 1, a dual-temperature adjustable ultra-high temperature hot air furnace, characterized in that: The furnace bottom box (3) is a combustion-supporting chamber of the hot air furnace. A drawer-type exhaust-aiding duct mechanism is provided in the furnace bottom box (3). The multiple exhaust duct mechanism comprises an air inlet duct (31) and four or more air outlet ducts (32) arranged in parallel at equal intervals. One end of each air outlet duct (32) is open and the other end is closed. The open end is connected to the air inlet duct (31). The air inlet duct (31) is connected to a small fan (9). The furnace bottom plate is a horizontally arranged square plate, a mounting hole is provided in the middle of the square plate, and a grate (52) is mounted on the mounting hole, vertical bottom plate air inlet pipes (53) are evenly arranged on the square plate around the mounting hole, and air inlet holes are provided on the furnace bottom plate corresponding to the bottom plate air inlet pipes (53).

3. According to claim 1, a dual-temperature adjustable ultra-high temperature hot air furnace is characterized in that: Horizontal heat sinks (54) are evenly distributed on the outer side wall of the furnace middle tank (5) corresponding to the middle tank interlayer.

4. According to claim 1, a dual-temperature adjustable ultra-high temperature hot air furnace is characterized in that: The rotating mechanism comprises a rotating shaft (14), one end of which is connected to the center of the air volume regulating plate (11), and the other end of which extends out of the square box body (12), and the rotating shaft (14) located in the square box body (12) is sleeved with a compression spring (15), one end of which contacts the air volume regulating plate (11), and the other end of which contacts the corresponding side wall of the square box body (12) through a spring fixing sealing sheet; the rotating shaft (14) located outside the square box body (12) is sleeved with a guide sleeve (16), and an adjusting handle (17) is provided at the free end, the guide sleeve (16) is fixedly connected to the side wall of the square box body (12) corresponding to one end of the square box body (12), and a locking handle (18) is provided through the guide sleeve (16) and the corresponding rotating shaft (14).

5. The dual-temperature adjustable ultra-high temperature hot air furnace according to claim 1, characterized in that: The furnace cover (2) comprises an inner furnace cover (21), an outer furnace cover (22) and a furnace cover bottom plate (23); the inner furnace cover (21) and the outer furnace cover (22) are spaced apart to form a furnace cover air chamber; the furnace cover bottom plate (23) is used to seal the bottom end of the furnace cover air chamber; the furnace cover bottom plate (23) is respectively connected to the upper ends of the first air duct (61) and the second air duct (62); The furnace cover air chamber is provided with an inverted L-shaped first furnace cover partition (24) at a position corresponding to partition I (65), and a second furnace cover partition (25) is provided at the upper part of the furnace cover air chamber on the opposite side of the first furnace cover partition (24), so that the air outlet from the upper end of the first air duct (61) bypasses the furnace cover air chamber and then enters the second air duct (62).

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