A hot blast stove

Abstract

The present application relates to hot blast stove technical field, specifically to a kind of hot blast stove, including furnace body;Furnace body includes hearth, primary sleeve, secondary sleeve, tertiary sleeve, four sleeve and multiple heat exchange tubes, primary sleeve, secondary sleeve, tertiary sleeve, four sleeve are sequentially sleeved on the outer circumference of hearth from inside to outside;Hearth and primary sleeve are first heat exchange cavity, primary sleeve and secondary sleeve are smoke cavity, secondary sleeve and tertiary sleeve are second heat exchange cavity, tertiary sleeve and four sleeve are third heat exchange cavity;Multiple heat exchange tubes are arranged in third heat exchange cavity;Hearth, smoke cavity, heat exchange tube are sequentially communicated;Third heat exchange cavity, circulating fan, second heat exchange cavity, first heat exchange cavity are sequentially communicated;The air direction of air passage and the flue gas direction of flue are opposite in the present application, heat is recovered from inside to outside step by step, and thermal efficiency is all ≥80%, the structure of furnace body ensures that the temperature of air outlet is highest and the temperature of the outermost side of furnace body is close to ambient temperature.

Description

Technical Field

[0001] This invention relates to the field of hot blast stove technology, and specifically to a hot blast stove. Background Technology

[0002] In tea processing, hot air is required to process the tea leaves. Current technology primarily uses biomass pellet combustion hot air furnaces to provide the heat source. However, this method suffers from low energy efficiency, with a large amount of waste heat not being effectively recovered and utilized. The thermal efficiency is less than 50%, resulting in energy waste and high tea processing costs. Furthermore, insufficient heat energy necessitates increasing the amount of biomass pellet fuel, leading to excessively high furnace temperatures. This results in a short furnace lifespan and excessively high furnace wall temperatures, posing a threat to workers.

[0003] Therefore, it is necessary to design a hot blast stove that can effectively recover and utilize waste heat, reduce costs, and at the same time meet the requirements of service life and safety. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a hot blast stove that can effectively recover and utilize waste heat, reduce costs, and at the same time meet the requirements of service life and safety.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: A hot air furnace includes a furnace body and a circulating fan; The furnace body includes a furnace chamber, a primary sleeve, a secondary sleeve, a tertiary sleeve, a quaternary sleeve, and multiple heat exchange cylinders. The primary sleeve is fitted on the outer periphery of the furnace chamber, the secondary sleeve is fitted on the outer periphery of the primary sleeve, the tertiary sleeve is fitted on the outer periphery of the secondary sleeve, and the quaternary sleeve is fitted on the outer periphery of the tertiary sleeve. The space between the furnace and the primary sleeve is the primary heat exchange chamber; the space between the primary sleeve and the secondary sleeve is the flue gas chamber; the space between the secondary sleeve and the tertiary sleeve is the secondary heat exchange chamber; and the space between the tertiary sleeve and the quaternary sleeve is the tertiary heat exchange chamber. Multiple heat exchange cylinders are arranged within the tertiary heat exchange chamber and communicate with the outside to form a flue gas outlet. The outer wall of the quaternary sleeve has an air inlet communicating with the outside. The primary heat exchange chamber has an air outlet communicating with the outside. The heat exchange cylinders are connected to the flue gas outlet. The furnace, flue, heat exchange cylinder, and flue outlet are connected in sequence to form a flue; the air inlet, tertiary heat exchange chamber, circulating fan, secondary heat exchange chamber, primary heat exchange chamber, and air outlet are connected in sequence to form an airflow channel.

[0006] Preferably, the furnace body includes a base, the base includes a seat and a connecting channel, the seat includes an inner cavity and an outer cavity; the inner cavity is used to connect the flue gas chamber and the heat exchange cylinder, and the outer cavity is connected to the secondary heat exchange chamber; The outer cavity is connected to the connecting channel; The outer wall of the fourth-stage sleeve is also provided with a raised connection port, and the connection port, the circulating fan, and the connection channel are connected outside the machine body.

[0007] Preferably, the connecting channel is arc-shaped.

[0008] Preferably, the three-stage heat exchange cavity is provided with an upper flow divider cavity and a lower flow divider cavity arranged in parallel. The upper flow divider is a circular ring structure, and two upper partitions with an included angle of 180° are provided inside the circular ring structure. The two upper partitions divide the upper flow divider into two mirror-shaped upper flow guide cavities. The lower flow divider is a C-shaped ring structure, and two lower partitions with an included angle of 180° are provided inside the C-shaped ring structure. The two lower partitions divide the lower flow divider into three lower guide cavities. The line connecting the two upper partitions is the X-axis, and the line connecting the two lower partitions is the Y-axis. The X-axis and Y-axis are perpendicular to each other, dividing the three-stage heat exchange cavity into four quadrants. The lower guide cavity in the fourth quadrant is designated as the first lower guide cavity, and a guide inlet is provided at the bottom of the first lower guide cavity. The lower guide cavity in the first quadrant is designated as the third lower guide cavity, and a guide outlet is provided on the third lower guide cavity. There are at least four heat exchange cylinders, which are respectively arranged in four quadrants and connected to the upper and lower flow distribution chambers in their respective quadrants; The inner cavity is connected to the flow inlet, and the smoke outlet is connected to the flow outlet.

[0009] Preferably, there are four or six heat exchange tubes in each quadrant.

[0010] Preferably, the air inlet is located on the outer wall of the fourth-stage sleeve corresponding to the first quadrant.

[0011] Preferably, the connection port is located on the outer wall of the fourth-level sleeve corresponding to the fourth quadrant.

[0012] Preferably, the surface of the heat exchange cylinder has several heat dissipation fins and / or several heat dissipation columns.

[0013] Preferably, the base is provided with an ash chamber, and the ash chamber is connected to the furnace chamber via a valve; The ash chamber is connected to the outside.

[0014] Preferably, the top of the furnace is connected to the flue gas chamber, and the bottom of the flue gas chamber is connected to the heat exchange cylinder; The top of the secondary heat exchange chamber is connected to the top of the primary heat exchange chamber, and the bottom of the primary heat exchange chamber is connected to the air outlet.

[0015] The beneficial effects of this invention are as follows: By ensuring the airflow direction in the airflow channel is opposite to the flue gas direction in the flue, and by combining the furnace, primary sleeve, secondary sleeve, tertiary sleeve, and quaternary sleeve arranged from the inside out, heat is recovered step-by-step from the inside out with decreasing temperature, achieving step-by-step energy recovery and maximizing the utilization of thermal energy. Inspection reports issued by the Fujian Provincial Agricultural Mechanization Research Institute after testing multiple products of different sizes manufactured using the technical solution of this application show that the thermal efficiency of multiple products is ≥80%, reducing thermal energy waste. The arrangement of the furnace, primary sleeve, secondary sleeve, tertiary sleeve, and quaternary sleeve from the inside out with decreasing temperature ensures that the temperature at the air outlet is the highest and the temperature of the outermost part of the furnace body is close to the ambient temperature, avoiding high furnace body temperature that could threaten workers. The circulating fan connects the tertiary and secondary heat exchange chambers, enabling gas flow from the air inlet to the air outlet in the airflow channel. Attached Figure Description

[0016] Figure 1 This is a first-angle schematic diagram of a hot blast stove according to a specific embodiment of the present invention; Figure 2 This is a second-angle schematic diagram of a hot air furnace according to a specific embodiment of the present invention (the blue arrow indicates the air direction); Figure 3 This is a third-angle schematic diagram of a hot air furnace according to a specific embodiment of the present invention; Figure 4 This is a disassembly diagram of the base of a hot air furnace according to a specific embodiment of the present invention (blue arrows indicate the direction of air, and red arrows indicate the direction of flue gas). Figure 5 This is a schematic diagram of the furnace body disassembly of a hot air furnace according to a specific embodiment of the present invention (blue arrows indicate the direction of air, and red arrows indicate the direction of flue gas). Figure 6 This is a schematic diagram of the first angle of flue gas flow in a three-stage heat exchange chamber of a hot blast stove according to a specific embodiment of the present invention (the red arrow indicates the direction of the flue gas, and the green cross lines are reference lines for the coordinate axes). Figure 7 This is a schematic diagram of the second angle of flue gas flow in a three-stage heat exchange chamber of a hot air furnace according to a specific embodiment of the present invention (the red arrow indicates the direction of flue gas, and the green cross lines are reference lines for the coordinate axes). Figure 8 This is a schematic diagram of the flow of flue gas in a three-stage heat exchange chamber of a hot blast stove according to a specific embodiment of the present invention (the red arrow indicates the direction of the flue gas, and the green cross lines are reference lines for the coordinate axes). Labeling Explanation: 1. Furnace body; 101. Furnace chamber; 102. Primary sleeve; 103. Secondary sleeve; 104. Tertiary sleeve; 105. Quaternary sleeve; 1051. Connection port; 106. Heat exchanger cylinder; 107. Primary heat exchange chamber; 108. Flue gas chamber; 109. Secondary heat exchange chamber; 110. Tertiary heat exchange chamber; 1101. Upper diversion chamber; 1102. Lower diversion chamber; 1103. ... 1. Lower guide cavity; 1104. Third lower guide cavity; 1105. Upper baffle; 1106. Lower baffle; 111. Seat; 1111. Inner cavity; 1112. Outer cavity; 1113. Ash cavity; 112. Connecting channel; 2. Smoke outlet; 3. Air inlet; 4. Air outlet; 5. Circulating fan; D1. First quadrant; D2. Second quadrant; D3. Third quadrant; D4. Fourth quadrant. Detailed Implementation

[0017] To explain in detail the technical content, objectives, and effects of the present invention, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0018] Please refer to Figures 1 to 8 A hot air furnace includes a furnace body 1 and a circulating fan 5; The furnace body 1 includes a furnace chamber 101, a primary sleeve 102, a secondary sleeve 103, a tertiary sleeve, a quaternary sleeve, and multiple heat exchange cylinders 106. The primary sleeve 102 is fitted on the outer periphery of the furnace chamber 101, the secondary sleeve 103 is fitted on the outer periphery of the primary sleeve 102, the tertiary sleeve is fitted on the outer periphery of the secondary sleeve 103, and the quaternary sleeve is fitted on the outer periphery of the tertiary sleeve. The space between the furnace 101 and the primary sleeve 102 is the primary heat exchange chamber 107; the space between the primary sleeve 102 and the secondary sleeve 103 is the flue gas chamber 108; the space between the secondary sleeve 103 and the tertiary sleeve is the secondary heat exchange chamber 109; and the space between the tertiary and quaternary sleeves is the tertiary heat exchange chamber 110. Multiple heat exchange cylinders 106 are arranged within the tertiary heat exchange chamber 110 and communicate with the outside to form a flue gas outlet 2. An air inlet 3 communicating with the outside is provided on the outer wall of the quaternary sleeve. An air outlet 4 communicating with the outside is provided in the primary heat exchange chamber 107. The heat exchange cylinders 106 are connected to the flue gas outlet 2. The furnace 101, flue 108, heat exchange cylinder 106, and flue outlet 2 are connected in sequence to form a flue; the air inlet 3, tertiary heat exchange chamber 110, circulating fan 5, secondary heat exchange chamber 109, primary heat exchange chamber 107, and air outlet 4 are connected in sequence to form an airflow channel.

[0019] As described above, the air direction in the airflow channel is opposite to the flue gas direction in the flue. Combined with the furnace 101, primary sleeve 102, secondary sleeve 103, tertiary sleeve, and quaternary sleeve arranged from the inside out, heat is recovered step-by-step from the inside out with decreasing temperature, achieving step-by-step energy recovery and maximizing thermal energy utilization. Inspection reports issued by the Fujian Provincial Agricultural Mechanization Research Institute after testing multiple products of different sizes manufactured using the technical solution of this application show that the thermal efficiency of multiple products is ≥80%, reducing heat energy waste. The arrangement of the furnace 101, primary sleeve 102, secondary sleeve 103, tertiary sleeve, and quaternary sleeve from the inside out with decreasing temperature ensures that the temperature at the air outlet 4 is the highest and the outermost temperature of the furnace body 1 is close to the ambient temperature, preventing high furnace body 1 temperatures from posing a threat to workers. The circulating fan 5 connects the tertiary heat exchange chamber 110 and the secondary heat exchange chamber 109, enabling gas flow from the air inlet 3 to the air outlet 4.

[0020] Furthermore, the furnace body 1 includes a base, the base includes a seat 111 and a connecting channel 112, the seat 111 includes an inner cavity 1111 and an outer cavity 1112; the inner cavity 1111 is used to connect the flue gas chamber 108 and the heat exchange cylinder 106, and the outer cavity 1112 is connected to the secondary heat exchange chamber 109; The outer cavity 1112 is connected to the connecting channel 112; The outer wall of the fourth-stage sleeve is also provided with a raised connection port 1051, and the connection port 1051, the circulating fan 5, and the connection channel 112 are connected outside the machine body.

[0021] As can be seen from the above description, by placing the circulating fan 5 outside the furnace body 1, the heat from the flue can be avoided from heating the circulating fan 5, which would cause the fan to overheat and fail, and maintenance convenience can be improved.

[0022] Furthermore, the connecting channel 112 is arc-shaped.

[0023] As can be seen from the above description, the arc-shaped connecting channel 112 can ensure the smoothness of airflow and reduce the loss of kinetic energy of the airflow.

[0024] Furthermore, the three-stage heat exchange chamber 110 is provided with an upper flow divider chamber 1101 and a lower flow divider chamber 1102 arranged in parallel. The upper flow divider 1101 has a circular structure, and two upper partitions 1105 with an included angle of 180° are provided inside the circular structure. The two upper partitions 1105 divide the upper flow divider 1101 into two mirror-shaped upper flow guide cavities. The lower diversion cavity 1102 has a C-shaped ring structure, and two lower partition plates 1106 with an included angle of 180° are provided inside the C-shaped ring structure. The two lower partition plates 1106 divide the lower diversion cavity 1102 into three lower guide cavities. The line connecting the two upper partitions 1105 is the X-axis, and the line connecting the two lower partitions 1106 is the Y-axis. The X-axis and Y-axis are perpendicular to each other, dividing the three-stage heat exchange chamber 110 into four quadrants. The lower guide chamber in the fourth quadrant D4 is set as the first lower guide chamber 1103, and the bottom of the first lower guide chamber 1103 is provided with a guide inlet. The lower guide chamber in the first quadrant D1 is set as the third lower guide chamber 1104, and the third lower guide chamber 1104 is provided with a guide outlet. There are at least four heat exchange cylinders 106, which are respectively arranged in four quadrants and connected to the upper flow branch cavity 1101 and the lower flow branch cavity 1102 in their respective quadrants. The inner cavity 1111 is connected to the flow inlet, and the smoke outlet 2 is connected to the flow outlet.

[0025] As can be seen from the above description, by using the heat exchange cylinder 106 in conjunction with the upper diversion chamber 1101 and the lower diversion chamber 1102, the flue gas can be bent, the path of the flue can be extended, and the heat exchange effect can be improved.

[0026] Furthermore, each quadrant has four or six heat exchange tubes 106.

[0027] Furthermore, the air inlet 3 is located on the outer wall of the fourth-stage sleeve corresponding to the first quadrant D1.

[0028] Furthermore, the connection port 1051 is located on the outer wall of the fourth-stage sleeve corresponding to the fourth quadrant D4.

[0029] As can be seen from the above description, by having the air inlet 3 located on the outer wall of the fourth-stage sleeve corresponding to the first quadrant D1 and the connection port 1051 located on the outer wall of the fourth-stage sleeve corresponding to the fourth quadrant D4, it can be ensured that heat can be utilized, and the positions of the flue temperature level and the airflow temperature level correspond to each other. For example, the air inlet 3 is the place with the lowest airflow temperature, and the flue (heat exchange cylinder 106) corresponding to the first quadrant D1 is also the place with the lowest temperature; while the connection port 1051 is the place with the highest airflow temperature corresponding to the third-stage heat exchange chamber 110, and the inner cavity 1111 corresponding to the fourth quadrant D4 enters the heat exchange cylinder 106 with the highest temperature. The temperature levels correspond step by step, thereby improving the heat exchange effect.

[0030] Furthermore, the surface of the heat exchange cylinder 106 has a plurality of heat dissipation fins and / or a plurality of heat dissipation columns.

[0031] As can be seen from the above description, the heat exchange effect can be improved by setting heat dissipation fins or heat dissipation columns.

[0032] Furthermore, the base is provided with an ash chamber 1113, which is connected to the furnace chamber 101 via a valve; The ash chamber 1113 is connected to the outside.

[0033] As can be seen from the above description, the valve design facilitates ash removal.

[0034] Furthermore, the top of the furnace 101 is connected to the flue gas chamber 108, and the bottom of the flue gas chamber 108 is connected to the heat exchange cylinder 106. The top of the secondary heat exchange chamber 109 is connected to the top of the primary heat exchange chamber 107, and the bottom of the primary heat exchange chamber 107 is connected to the air outlet 4.

[0035] As can be seen from the above description, by connecting the top of the furnace 101 with the flue gas chamber 108 and the bottom of the primary heat exchange chamber 107 with the air outlet 4, and by connecting the top of the secondary heat exchange chamber 109 with the top of the primary heat exchange chamber 107 and the bottom of the flue gas chamber 108 with the heat exchange cylinder 106, the flow directions of adjacent flue gas ducts and airflow channels can be reversed, thereby improving the heat exchange effect. Furthermore, by combining the structure of the tertiary heat exchange chamber 110 and multiple heat exchange cylinders 106, the flow directions of the flue gas ducts and airflow channels are completely reversed, further improving the heat exchange effect.

[0036] Example 1 A hot air furnace includes a furnace body 1 and a circulating fan 5; The furnace body 1 includes a furnace chamber 101, a primary sleeve 102, a secondary sleeve 103, a tertiary sleeve, a quaternary sleeve, and multiple heat exchange cylinders 106. The primary sleeve 102 is fitted on the outer periphery of the furnace chamber 101, the secondary sleeve 103 is fitted on the outer periphery of the primary sleeve 102, the tertiary sleeve is fitted on the outer periphery of the secondary sleeve 103, and the quaternary sleeve is fitted on the outer periphery of the tertiary sleeve. The space between the furnace 101 and the primary sleeve 102 is the primary heat exchange chamber 107; the space between the primary sleeve 102 and the secondary sleeve 103 is the flue gas chamber 108; the space between the secondary sleeve 103 and the tertiary sleeve is the secondary heat exchange chamber 109; and the space between the tertiary and quaternary sleeves is the tertiary heat exchange chamber 110. Multiple heat exchange cylinders 106 are arranged within the tertiary heat exchange chamber 110 and communicate with the outside to form a flue gas outlet 2. An air inlet 3 communicating with the outside is provided on the outer wall of the quaternary sleeve. An air outlet 4 communicating with the outside is provided in the primary heat exchange chamber 107. The heat exchange cylinders 106 are connected to the flue gas outlet 2. The furnace 101, flue 108, heat exchange cylinder 106, and flue outlet 2 are connected in sequence to form a flue; the air inlet 3, tertiary heat exchange chamber 110, circulating fan 5, secondary heat exchange chamber 109, primary heat exchange chamber 107, and air outlet 4 are connected in sequence to form an airflow channel.

[0037] The furnace body 1 includes a base, the base includes a seat 111 and a connecting channel 112, the seat 111 includes an inner cavity 1111 and an outer cavity 1112; the inner cavity 1111 is used to connect the flue gas chamber 108 and the heat exchange cylinder 106, and the outer cavity 1112 is connected to the secondary heat exchange chamber 109. The outer cavity 1112 is connected to the connecting channel 112; The outer wall of the fourth-stage sleeve is also provided with a raised connection port 1051, and the connection port 1051, the circulating fan 5, and the connection channel 112 are connected outside the machine body.

[0038] The connecting channel 112 is arc-shaped.

[0039] The three-stage heat exchange chamber 110 is provided with an upper diversion chamber 1101 and a lower diversion chamber 1102 arranged in parallel. The upper flow divider 1101 has a circular structure, and two upper partitions 1105 with an included angle of 180° are provided inside the circular structure. The two upper partitions 1105 divide the upper flow divider 1101 into two mirror-shaped upper flow guide cavities. The lower diversion cavity 1102 has a C-shaped ring structure, and two lower partition plates 1106 with an included angle of 180° are provided inside the C-shaped ring structure. The two lower partition plates 1106 divide the lower diversion cavity 1102 into three lower guide cavities. The line connecting the two upper partitions 1105 is the X-axis, and the line connecting the two lower partitions 1106 is the Y-axis. The X-axis and Y-axis are perpendicular to each other, dividing the three-stage heat exchange chamber 110 into four quadrants. The lower guide chamber in the fourth quadrant D4 is set as the first lower guide chamber 1103, and the bottom of the first lower guide chamber 1103 is provided with a guide inlet. The lower guide chamber in the first quadrant D1 is set as the third lower guide chamber 1104, and the third lower guide chamber 1104 is provided with a guide outlet. That is, the upper guide cavities of the first quadrant D1 and the second quadrant D2 are connected, and the upper guide cavities of the third quadrant D3 and the fourth quadrant D4 are connected; the remaining lower guide cavity spans the second quadrant D2 and the third quadrant D3. There are at least four heat exchange cylinders 106, which are respectively arranged in four quadrants and connected to the upper flow branch cavity 1101 and the lower flow branch cavity 1102 in their respective quadrants. The inner cavity 1111 is connected to the flow inlet, and the smoke outlet 2 is connected to the flow outlet.

[0040] There are four or six heat exchangers 106 in each quadrant.

[0041] The air inlet 3 is located on the outer wall of the fourth-stage sleeve corresponding to the first quadrant D1.

[0042] The connection port 1051 is located on the outer wall of the fourth-level sleeve corresponding to the fourth quadrant D4.

[0043] The surface of the heat exchange cylinder 106 has several heat dissipation fins and / or several heat dissipation columns.

[0044] The base is provided with an ash chamber 1113, and the ash chamber 1113 is connected to the furnace chamber 101 through a valve; The ash chamber 1113 is connected to the outside.

[0045] Example 2 A hot air furnace includes a furnace body 1 and a circulating fan 5; The furnace body 1 includes a furnace chamber 101, a primary sleeve 102, a secondary sleeve 103, a tertiary sleeve, a quaternary sleeve, and multiple heat exchange cylinders 106. The primary sleeve 102 is fitted on the outer periphery of the furnace chamber 101, the secondary sleeve 103 is fitted on the outer periphery of the primary sleeve 102, the tertiary sleeve is fitted on the outer periphery of the secondary sleeve 103, and the quaternary sleeve is fitted on the outer periphery of the tertiary sleeve. The space between the furnace 101 and the primary sleeve 102 is the primary heat exchange chamber 107; the space between the primary sleeve 102 and the secondary sleeve 103 is the flue gas chamber 108; the space between the secondary sleeve 103 and the tertiary sleeve is the secondary heat exchange chamber 109; and the space between the tertiary and quaternary sleeves is the tertiary heat exchange chamber 110. Multiple heat exchange cylinders 106 are arranged within the tertiary heat exchange chamber 110 and communicate with the outside to form a flue gas outlet 2. An air inlet 3 communicating with the outside is provided on the outer wall of the quaternary sleeve. An air outlet 4 communicating with the outside is provided in the primary heat exchange chamber 107. The heat exchange cylinders 106 are connected to the flue gas outlet 2. The furnace 101, flue 108, heat exchange cylinder 106, and flue outlet 2 are connected in sequence to form a flue; the air inlet 3, tertiary heat exchange chamber 110, circulating fan 5, secondary heat exchange chamber 109, primary heat exchange chamber 107, and air outlet 4 are connected in sequence to form an airflow channel.

[0046] The top of the furnace 101 is connected to the flue gas chamber 108, and the bottom of the flue gas chamber 108 is connected to the heat exchange cylinder 106. The top of the secondary heat exchange chamber 109 is connected to the top of the primary heat exchange chamber 107, and the bottom of the primary heat exchange chamber 107 is connected to the air outlet 4.

[0047] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent modifications made based on the content of the present invention specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A hot air furnace, characterized in that, Including the furnace body and circulating fan; The furnace body includes a furnace chamber, a primary sleeve, a secondary sleeve, a tertiary sleeve, a quaternary sleeve, and multiple heat exchange cylinders. The primary sleeve is fitted on the outer periphery of the furnace chamber, the secondary sleeve is fitted on the outer periphery of the primary sleeve, the tertiary sleeve is fitted on the outer periphery of the secondary sleeve, and the quaternary sleeve is fitted on the outer periphery of the tertiary sleeve. The space between the furnace and the first-stage sleeve is the first-stage heat exchange chamber; the space between the first-stage sleeve and the second-stage sleeve is the flue gas chamber; the space between the second-stage sleeve and the third-stage sleeve is the second-stage heat exchange chamber; and the space between the third-stage sleeve and the fourth-stage sleeve is the third-stage heat exchange chamber. Multiple heat exchange cylinders are arranged inside the three-stage heat exchange chamber and communicate with the outside to form a smoke outlet; the outer wall of the fourth-stage sleeve is provided with an air inlet communicating with the outside; the first-stage heat exchange chamber is provided with an air outlet communicating with the outside. The furnace, flue, heat exchange cylinder, and flue outlet are connected in sequence to form a flue; the air inlet, tertiary heat exchange chamber, circulating fan, secondary heat exchange chamber, primary heat exchange chamber, and air outlet are connected in sequence to form an airflow channel.

2. The hot blast stove according to claim 1, characterized in that, The furnace body includes a base, the base includes a seat and a connecting channel, the seat includes an inner cavity and an outer cavity; the inner cavity is used to connect the flue chamber and the heat exchange cylinder, and the outer cavity is connected to the secondary heat exchange chamber. The outer cavity is connected to the connecting channel; The outer wall of the fourth-stage sleeve is also provided with a raised connection port, and the connection port, the circulating fan, and the connection channel are connected outside the machine body.

3. The hot blast stove according to claim 2, characterized in that, The connection channel is arc-shaped.

4. The hot blast stove according to claim 2, characterized in that, The three-stage heat exchange chamber is provided with an upper and lower flow distribution chamber arranged in parallel. The upper flow divider is a circular ring structure, and two upper partitions with an included angle of 180° are provided inside the circular ring structure. The two upper partitions divide the upper flow divider into two mirror-shaped upper flow guide cavities. The lower flow divider is a C-shaped ring structure, and two lower partitions with an included angle of 180° are provided inside the C-shaped ring structure. The two lower partitions divide the lower flow divider into three lower guide cavities. The line connecting the two upper partitions is the X-axis, and the line connecting the two lower partitions is the Y-axis. The X-axis and Y-axis are perpendicular to each other, dividing the three-stage heat exchange cavity into four quadrants. The lower guide cavity in the fourth quadrant is designated as the first lower guide cavity, and a guide inlet is provided at the bottom of the first lower guide cavity. The lower guide cavity in the first quadrant is designated as the third lower guide cavity, and a guide outlet is provided on the third lower guide cavity. There are at least four heat exchange cylinders, which are respectively arranged in four quadrants and connected to the upper and lower flow distribution chambers in their respective quadrants; The inner cavity is connected to the flow inlet, and the smoke outlet is connected to the flow outlet.

5. The hot blast stove according to claim 4, characterized in that, There are four or six heat exchangers in each quadrant.

6. The hot blast stove according to claim 4, characterized in that, The air inlet is located on the outer wall of the fourth-stage sleeve corresponding to the first quadrant.

7. The hot blast stove according to claim 4, characterized in that, The connection port is located on the outer wall of the fourth-level sleeve corresponding to the fourth quadrant.

8. The hot blast stove according to any one of claims 1 or 4, characterized in that, The surface of the heat exchange cylinder has several heat dissipation fins and / or several heat dissipation columns.

9. The hot blast stove according to claim 2, characterized in that, The base is provided with an ash chamber, and the ash chamber is connected to the furnace chamber through a valve; The ash chamber is connected to the outside.

10. The hot blast stove according to claim 1, characterized in that, The top of the furnace is connected to the flue gas chamber, and the bottom of the flue gas chamber is connected to the heat exchange cylinder; The top of the secondary heat exchange chamber is connected to the top of the primary heat exchange chamber, and the bottom of the primary heat exchange chamber is connected to the air outlet.

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