A modularly installable heating furnace main structure

Abstract

This invention relates to a modularly installable main structure of a heating furnace, belonging to the field of industrial heating furnace equipment. A flue is located at the top of the combustion chamber, and a convection transition chamber is installed at the top of the combustion chamber, its lower end connected to the upper end of the flue. A first convection chamber is sealed at the upper end of the convection transition chamber, a second convection chamber is sealed at the upper end of the first convection chamber, a denitrification spray chamber is sealed at the upper end of the second convection chamber, and a denitrification catalytic reaction chamber is sealed at the upper end of the denitrification spray chamber. The combustion chamber contains process gas radiation heat exchanger tubes. The first convection chamber contains a first gas convection heat exchanger tube and a second gas convection heat exchanger tube, and the second convection chamber contains a third gas convection heat exchanger tube. The outlet of the third gas convection heat exchanger tube is connected in series with the inlet of the second gas convection heat exchanger tube, and the inlet of the second gas convection heat exchanger tube is connected to the outlet of the third gas convection heat exchanger tube. Advantages: Modular production and assembly are possible, reducing transportation and process difficulty, and on-site construction is convenient and quick.

Description

Technical Field

[0001] This utility model relates to the field of industrial heating furnace equipment, and in particular to a modularly installable main structure for a heating furnace. Background Technology

[0002] A heating furnace is a device used to heat materials or workpieces to the rolling or forging temperature. It is widely used in many industries, including petroleum, chemical, metallurgy, machinery, heat treatment, surface treatment, building materials, electronics, materials, light industry, daily chemicals, and pharmaceuticals.

[0003] Currently, traditional heating furnaces are mostly integral welded structures, which have problems such as many parts, difficult transportation, long installation period, complicated on-site construction, and inconvenient maintenance.

[0004] Therefore, it is necessary to develop a modularly installable main structure for the heating furnace to overcome the aforementioned technical problems. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a modularly installable heating furnace main structure, which effectively overcomes the defects of the prior art.

[0006] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A modularly installable heating furnace main structure includes a combustion chamber, a convection transition chamber, a first convection chamber, a second convection chamber, a denitrification spray chamber, and a denitrification catalytic reaction chamber. The combustion chamber has a flue at its top. The convection transition chamber is detachably mounted on the top of the combustion chamber, with its lower end connected and communicating with the upper end of the flue. The first convection chamber is detachably and sealed to the upper end of the convection transition chamber, with their inner cavities communicating vertically. The second convection chamber is detachably and sealed to the upper end of the first convection chamber, with their inner cavities communicating vertically. The denitrification spray chamber is detachably and sealed to the upper end of the second convection chamber, with their inner cavities communicating vertically. The denitrification catalytic reaction chamber is detachably and sealed to the upper end of the first convection chamber. The upper end of the denitrification spray chamber is connected to the inner cavity of the two chambers. The top of the denitrification catalytic reaction chamber is provided with a flue gas outlet. The combustion chamber is provided with a process gas radiation heat exchange furnace tube. The first convection chamber is provided with a first gas convection heat exchange furnace tube and a second gas convection heat exchange furnace tube spaced vertically. The second convection chamber is provided with a third gas convection heat exchange furnace tube. The outlet of the third gas convection heat exchange furnace tube is connected in series with the inlet of the second gas convection heat exchange furnace tube through a pipeline. The inlet of the third gas convection heat exchange furnace tube is connected to the outlet of the third gas convection heat exchange furnace tube through a side branch pipeline. The outlet of the first gas convection heat exchange furnace tube is connected to the inlet of the process gas radiation heat exchange furnace tube through a pipeline.

[0007] Based on the above technical solution, the present invention can be further improved as follows.

[0008] Furthermore, the combustion chamber, convection transition chamber, first convection chamber, second convection chamber, denitrification spray chamber, and denitrification catalytic reaction chamber are all rectangular chambers. The width of the convection transition chamber is smaller than the width of the combustion chamber, and the lengths of the two are equal. The lengths and widths of the convection transition chamber, first convection chamber, second convection chamber, denitrification spray chamber, and denitrification catalytic reaction chamber are all equal.

[0009] Furthermore, the combustion chamber has upwardly extending support frames at both ends of its top, and the convection transition chamber has a cuboid-shaped extension chamber at its lower end with a length and width smaller than its own. The lower end of the extension chamber is connected to and communicates with the upper end of the flue. The lower ends of the convection transition chamber are respectively supported on the support frames at both ends and are detachably connected to each other.

[0010] Furthermore, the upper end of the aforementioned flue is surrounded by a first side plate, and the lower end of the aforementioned extended chamber is surrounded by a second side plate. The first and second side plates are sealed together and assembled with bolts. The upper end of the aforementioned convection transition chamber is surrounded by a third side plate, and the lower end of the aforementioned first convection chamber is surrounded by a fourth side plate. The third and fourth side plates are sealed together and assembled with bolts passing through them. The upper end of the aforementioned first convection chamber is surrounded by a fifth side plate, and the lower end of the aforementioned second convection chamber is surrounded by a sixth side plate. The fifth and sixth side plates are sealed together and assembled with bolts passing through them. The upper end of the aforementioned second convection chamber is surrounded by a seventh side plate, and the lower end of the aforementioned denitrification spray chamber is surrounded by an eighth side plate. The seventh and eighth side plates are sealed together and assembled with bolts passing through them. The upper end of the aforementioned denitrification spray chamber is surrounded by a ninth side plate, and the lower end of the aforementioned denitrification catalytic reaction chamber is surrounded by a tenth side plate. The ninth and tenth side plates are sealed together and assembled with bolts passing through them.

[0011] Furthermore, the convection transition chamber is provided with flue gas inlets on both sides, and the combustion chamber is provided with flue gas outlets on both sides of the top, which correspond one-to-one with the flue gas inlets. The flue gas inlets are connected and communicated with the corresponding flue gas outlets through curved flue pipes.

[0012] Furthermore, the aforementioned combustion chamber, convection transition chamber, first convection chamber, second convection chamber, denitrification spray chamber, and denitrification catalytic reaction chamber all include a rectangular frame and refractory side plates arranged on the inner sides of the frame. The inner surface of the refractory side plates of the combustion chamber is covered and fixed with refractory blocks.

[0013] Furthermore, the aforementioned denitrification spray chamber is equipped with a denitrification spray pipeline.

[0014] Furthermore, a grid is provided in the lower part of the aforementioned denitrification catalytic reaction chamber, and a denitrification catalyst is installed in the upper part of the aforementioned grid.

[0015] Furthermore, a supporting foundation is provided around the bottom of the combustion chamber.

[0016] Furthermore, maintenance platforms are installed on the outside of the aforementioned combustion chamber, convection transition chamber, first convection chamber, second convection chamber, denitrification spray chamber, and denitrification catalytic reaction chamber.

[0017] The advantages of this utility model are: reasonable structural design, modular production and assembly, reduced transportation and production process difficulty, and convenient and quick on-site construction. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the modularly installable main structure of the heating furnace of this utility model; Figure 2 This is a side view of the modularly installable heating furnace main structure of this utility model; Figure 3 This is a schematic diagram of the other side of the modularly installable heating furnace main structure of this utility model; Figure 4 This is a schematic diagram of the internal structure of the modularly installable heating furnace main body of this utility model.

[0019] The attached diagram lists the components represented by each number as follows: 1. Combustion chamber; 2. Convection transition chamber; 3. First convection chamber; 4. Second convection chamber; 5. Denitrification spray chamber; 6. Denitrification catalytic reaction chamber; 7. Maintenance platform; 11. Process gas radiation heat exchanger tube; 21. Smoke tube; 31. First gas convection heat exchanger tube; 32. Second gas convection heat exchanger tube; 41. Third gas convection heat exchanger tube; 51. Denitrification spray pipeline; 61. Grille; 62. Denitrification catalyst; 111. Refractory block. Detailed Implementation

[0020] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0021] Example like Figure 1 , 2As shown in Figures 3 and 4, the modularly installable main structure of the heating furnace in this embodiment includes a combustion chamber 1, a convection transition chamber 2, a first convection chamber 3, a second convection chamber 4, a denitrification spray chamber 5, and a denitrification catalytic reaction chamber 6. The combustion chamber 1 has a flue at its top. The convection transition chamber 2 is detachably mounted on the top of the combustion chamber 1, with its lower end connected to and communicating with the upper end of the flue. The first convection chamber 3 is detachably and sealed to the upper end of the convection transition chamber 2, with their inner cavities communicating vertically. The second convection chamber 4 is detachably and sealed to the upper end of the first convection chamber 3, with their inner cavities communicating vertically. The denitrification spray chamber 5 is detachably and sealed to the upper end of the second convection chamber 4, with their inner cavities communicating vertically. The nitration catalytic reaction chamber 6 is detachably and sealed at the upper end of the denitration spray chamber 5, and the two are connected internally. The top of the denitration catalytic reaction chamber 6 is provided with a flue gas outlet. The combustion chamber 1 is provided with a process gas radiation heat exchange furnace tube 11. The first convection chamber 3 is provided with a first gas convection heat exchange furnace tube 31 and a second gas convection heat exchange furnace tube 32 arranged vertically at intervals. The second convection chamber 4 is provided with a third gas convection heat exchange furnace tube 41. The outlet of the third gas convection heat exchange furnace tube 41 is connected in series with the inlet of the second gas convection heat exchange furnace tube 32 through a pipeline. The inlet of the second gas convection heat exchange furnace tube 32 is connected to the outlet of the third gas convection heat exchange furnace tube 41 through a side branch pipeline (a in the figure).

[0022] The modularly installable heating furnace main structure of this embodiment adopts a multi-section chamber design for assembly. Each chamber is processed separately, transported separately to the target location, and then assembled together according to the structure. The overall structure is reasonably designed, enabling modular production and assembly, reducing transportation and production process difficulties, and making on-site construction convenient and quick. Furthermore, the modularly installable main structure of the heating furnace in this embodiment can heat two process gases (such as process gas ① and process gas ②) during use. Process gas ① has a larger flow rate, while process gas ② has a smaller flow rate. Process gas ① first enters the first gas convection heat exchanger tube 31 and exchanges heat with the flue gas in the first convection chamber 3. Then, it enters the process gas radiation heat exchanger tube 11 and exchanges heat with the combustion chamber 1. The temperature of process gas ① can be controlled by controlling the amount of low-temperature gas (such as low-calorific-value gas) burned in the combustion chamber 1. Process gas ② flows through the third gas convection heat exchanger tube 41 and the second gas convection heat exchanger tube 32, and exchanges heat fully with the flue gas in the second convection chamber 4 and the first convection chamber 3. During this process, the temperature of process gas ② when it is drawn out is controlled by the flow rate of process gas ② flowing through the side branch pipeline. Specifically, a flow control valve is installed on the side branch pipeline. The flow control valve adjusts the flow rate of the cold gas and mixes it with the heated gas to control the gas temperature of process gas ②. It can improve the utilization rate of low-calorific-value gas (gas), reduce energy waste, and meet the heating conditions of two different process gases with different flow rates.

[0023] In this embodiment, the inlet and outlet of the process gas radiation heat exchanger tube 11 both pass through the side wall of the combustion chamber 1 and are exposed outside the chamber. Similarly, the inlet and outlet of the first gas convection heat exchanger tube 31, the second gas convection heat exchanger tube 32, and the third gas convection heat exchanger tube 41 also pass through the corresponding side wall of the chamber and are exposed outside the chamber. The side branch lines are set outside the furnace body.

[0024] In this embodiment, the combustion chamber 1, convection transition chamber 2, first convection chamber 3, second convection chamber 4, denitrification spray chamber 5, and denitrification catalytic reaction chamber 6 are all rectangular chambers. The width of the convection transition chamber 2 is smaller than the width of the combustion chamber 1, and their lengths are equal. The lengths and widths of the convection transition chamber 2, first convection chamber 3, second convection chamber 4, denitrification spray chamber 5, and denitrification catalytic reaction chamber 6 are all equal. The combustion chamber has a large space, and the cross-sectional areas of the upper chambers are consistent. They are stacked and assembled vertically to ensure good combustion effect and smooth flue gas flow.

[0025] In a preferred embodiment, the combustion chamber 1 has upwardly extending support frames at both ends of its top, and the convection transition chamber 2 has a cuboid-shaped extension chamber (represented by b in the figure) at its lower end, the lower end of which is smaller in both length and width than the combustion chamber 1. The lower end of the extension chamber is connected to and communicates with the upper end of the flue. The lower ends of the convection transition chamber 2 are respectively supported on the support frames at both ends and are detachably connected to each other.

[0026] In the above implementation scheme, the support frame provides good support for the upper convection transition chamber 2, first convection chamber 3, second convection chamber 4, denitrification spray chamber 5 and denitrification catalytic reaction chamber 6, and the overall structure is relatively stable.

[0027] In a preferred embodiment, the upper end of the flue is surrounded by a first side plate, the lower end of the extended chamber is surrounded by a second side plate, the first and second side plates are sealed together and assembled by bolts, the upper end of the convection transition chamber 2 is surrounded by a third side plate, the lower end of the first convection chamber 3 is surrounded by a fourth side plate, the third and fourth side plates are sealed together and assembled by bolts passing through them, the upper end of the first convection chamber 3 is surrounded by a fifth side plate, the lower end of the second convection chamber 4 is surrounded by a sixth side plate, the fifth and sixth side plates are sealed together and assembled by bolts passing through them, the upper end of the second convection chamber 4 is surrounded by a seventh side plate, the lower end of the denitrification spray chamber 5 is surrounded by an eighth side plate, the seventh and eighth side plates are sealed together and assembled by bolts passing through them, the upper end of the denitrification spray chamber 5 is surrounded by a ninth side plate, and the lower end of the denitrification catalytic reaction chamber 6 is surrounded by a tenth side plate, the ninth and tenth side plates are sealed together and assembled by bolts passing through them.

[0028] In the above implementation scheme, the design of the first, second, third, fourth, fifth, sixth, seventh, eighth, ninth, and tenth side plates makes the assembly of the various chambers more convenient. During assembly, each chamber above the combustion chamber 1 is lifted one by one using hoisting equipment, and then stacked sequentially on top of the lower chamber. Assembly is then achieved using bolts that penetrate adjacent side plates. A sealing structure can be provided between adjacent side plates to give the furnace body better sealing performance (e.g., grooves and ridges can be provided on the sides of the side plates that are close to each other, or high-temperature resistant sealing rings can be sandwiched between them).

[0029] In this embodiment, the first side plate, second side plate, third side plate, fourth side plate, fifth side plate, sixth side plate, seventh side plate, eighth side plate, ninth side plate, and tenth side plate are all made of channel steel and welded around the corresponding chamber edges.

[0030] In a preferred embodiment, the convection transition chamber 2 is provided with flue gas inlets on both sides, and the combustion chamber 1 is provided with flue gas outlets on both sides of the top, which correspond one-to-one with the flue gas inlets. The flue gas inlets are connected and communicated with the corresponding flue gas outlets through a curved flue pipe 21.

[0031] In the above implementation scheme, since the length and width of the convection transition chamber 2 are smaller than those of the combustion chamber 1, the flue pipes 21 are provided on the upper sides of both sides of the inner cavity of the combustion chamber 1, which can make the flue gas in the combustion chamber 1 enter the convection transition chamber 2 more evenly and avoid the problem of poor upward flow of flue gas on both sides of the combustion chamber 1.

[0032] In a preferred embodiment, the combustion chamber 1, convection transition chamber 2, first convection chamber 3, second convection chamber 4, denitrification spray chamber 5, and denitrification catalytic reaction chamber 6 all include a cuboid frame and refractory side plates (indicated by c in the figure) arranged on the inner side of the frame. The inner surface of the refractory side plate of the combustion chamber 1 is covered and fixed with refractory blocks 111.

[0033] In the above implementation scheme, the frame is constructed using interlocking steel components. For example, the longitudinal beams can be made of I-beams, and the transverse beams can be made of channel steel, which are then welded together. Fire-resistant side plates are encapsulated on the four inner side walls of the frame (any fire-resistant material is acceptable; this is existing technology and will not be elaborated upon here). Multiple fire-resistant blocks 111 are then installed on the inner side of the fire-resistant side plates using bolts or other anchors (the fire-resistant blocks 111 are evenly distributed across the inner surface of the fire-resistant side plates; readily available fire-resistant materials are acceptable; this is existing technology and will not be elaborated upon here). Overall, the structure of each chamber is relatively robust, and the fire resistance is good.

[0034] In this embodiment, the denitrification spray chamber 5 is equipped with a denitrification spray pipeline 51. The inlet of the denitrification spray pipeline 51 extends out of the denitrification spray chamber 5, and multiple nozzles are connected to the pipeline. Denitrification liquid is introduced from the outside and sprayed into the denitrification spray chamber 5 to come into contact with the flue gas.

[0035] In this embodiment, a grid 61 is provided at the lower part of the denitrification catalytic reaction chamber 6, and a denitrification catalyst 62 is installed on the upper part of the grid 61. The design of the grid 61 can both accommodate the placement of the denitrification catalyst 62 and not obstruct the passage of flue gas. The denitrification catalyst 62 is a conventional material and will not be described in detail here.

[0036] In this embodiment, a supporting foundation is provided around the bottom of the combustion chamber 1. Cement pillars can be used, and the steel structure of the combustion chamber 1 frame extends downward into the cement pillars to ensure the stable assembly of the entire furnace body at the target location.

[0037] In this embodiment, a maintenance platform 7 is installed on the outside of the combustion chamber 1, convection transition chamber 2, first convection chamber 3, second convection chamber 4, denitrification spray chamber 5, and denitrification catalytic reaction chamber 6. The maintenance platform 7 allows operators to stand on it to perform maintenance work on each chamber section.

[0038] In this embodiment, multiple burners are arranged on the bottom wall of combustion chamber 1. The burners are installed on-site. Installation positions are reserved on the bottom wall of combustion chamber 1.

[0039] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0040] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0041] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0042] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0043] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0044] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A modularly installable heating furnace main body structure, characterized in that: The system includes a combustion chamber (1), a convection transition chamber (2), a first convection chamber (3), a second convection chamber (4), a denitrification spray chamber (5), and a denitrification catalytic reaction chamber (6). The combustion chamber (1) has a flue at its top. The convection transition chamber (2) is detachably mounted on the top of the combustion chamber (1), with its lower end connected to and communicating with the upper end of the flue. The first convection chamber (3) is detachably and sealed to the upper end of the convection transition chamber (2), with their inner cavities communicating vertically. The second convection chamber (4) is detachably and sealed to the upper end of the first convection chamber (3), with their inner cavities communicating vertically. The denitrification spray chamber (5) is detachably and sealed to the upper end of the second convection chamber (4), with their inner cavities communicating vertically. The denitrification catalytic reaction chamber (6) is detachably and sealed to the upper end of the denitrification spray chamber (5). The internal cavity is connected. The top of the denitrification catalytic reaction chamber (6) is provided with a flue gas outlet. The combustion chamber (1) is provided with a process gas radiation heat exchange furnace tube (11). The first convection chamber (3) is provided with a first gas convection heat exchange furnace tube (31) and a second gas convection heat exchange furnace tube (32) spaced vertically. The second convection chamber (4) is provided with a third gas convection heat exchange furnace tube (41). The outlet of the third gas convection heat exchange furnace tube (41) is connected in series with the inlet of the second gas convection heat exchange furnace tube (32) through a pipeline. The inlet of the second gas convection heat exchange furnace tube (32) is connected to the outlet of the third gas convection heat exchange furnace tube (41) through a side branch pipeline. The outlet of the first gas convection heat exchange furnace tube (31) is connected to the inlet of the process gas radiation heat exchange furnace tube (11) through a pipeline.

2. The modularly installable main structure of a heating furnace according to claim 1, characterized in that: The combustion chamber (1), convection transition chamber (2), first convection chamber (3), second convection chamber (4), denitrification spray chamber (5), and denitrification catalytic reaction chamber (6) are all rectangular chambers. The width of the convection transition chamber (2) is smaller than the width of the combustion chamber (1), and the lengths of the two are equal. The lengths and widths of the convection transition chamber (2), first convection chamber (3), second convection chamber (4), denitrification spray chamber (5), and denitrification catalytic reaction chamber (6) are all equal.

3. The modularly installable main structure of a heating furnace according to claim 2, characterized in that: The combustion chamber (1) has upward-extending support frames at both ends of its top. The convection transition chamber (2) has a cuboid-shaped extension chamber at its lower end with a length and width smaller than its own. The lower end of the extension chamber is connected to and communicates with the upper end of the flue. The lower ends of the convection transition chamber (2) are respectively supported on the support frames at both ends and are detachably connected to each other.

4. The modularly installable main structure of a heating furnace according to claim 3, characterized in that: The upper end of the flue is surrounded by a first side plate, and the lower end of the extended chamber is surrounded by a second side plate. The first and second side plates are sealed together and assembled with bolts. The upper end of the convection transition chamber (2) is surrounded by a third side plate, and the lower end of the first convection chamber (3) is surrounded by a fourth side plate. The third and fourth side plates are sealed together and assembled with bolts passing through them. The upper end of the first convection chamber (3) is surrounded by a fifth side plate, and the lower end of the second convection chamber (4) is surrounded by a sixth side plate. The fifth and sixth side plates are sealed together and assembled by bolts passing through them. The upper end of the second convection chamber (4) is surrounded by a seventh side plate, and the lower end of the denitrification spray chamber (5) is surrounded by an eighth side plate. The seventh and eighth side plates are sealed together and assembled by bolts passing through them. The upper end of the denitrification spray chamber (5) is surrounded by a ninth side plate, and the lower end of the denitrification catalytic reaction chamber (6) is surrounded by a tenth side plate. The ninth and tenth side plates are sealed together and assembled by bolts passing through them.

5. The modularly installable main structure of a heating furnace according to claim 3, characterized in that: The convection transition chamber (2) is provided with flue gas inlets on both sides, and the combustion chamber (1) is provided with flue gas outlets on both sides of the top, which correspond one-to-one with the flue gas inlets. The flue gas inlets are connected and communicated with the corresponding flue gas outlets through a curved flue pipe (21).

6. The modularly installable main structure of a heating furnace according to claim 2, characterized in that: The combustion chamber (1), convection transition chamber (2), first convection chamber (3), second convection chamber (4), denitrification spray chamber (5) and denitrification catalytic reaction chamber (6) all include a rectangular frame and refractory side plates arranged on the inner side of the frame. The inner surface of the refractory side plate of the combustion chamber (1) is covered and fixed with refractory blocks (111).

7. A modularly installable heating furnace main body structure according to any one of claims 1 to 6, characterized in that: The denitrification spray chamber (5) is equipped with a denitrification spray pipeline (51).

8. A modularly installable heating furnace main body structure according to any one of claims 1 to 6, characterized in that: The lower part of the denitrification catalytic reaction chamber (6) is provided with a grid (61), and the upper part of the grid (61) is equipped with a denitrification catalyst (62).

9. A modularly installable heating furnace main body structure according to any one of claims 1 to 6, characterized in that: The combustion chamber (1) is provided with a supporting base around its bottom.

10. A modularly installable heating furnace main body structure according to any one of claims 1 to 6, characterized in that: Maintenance platforms (7) are installed on the outside of the combustion chamber (1), convection transition chamber (2), first convection chamber (3), second convection chamber (4), denitrification spray chamber (5) and denitrification catalytic reaction chamber (6).

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