Waste gas heat exchange device

Abstract

The utility model relates to the technical field of waste gas treatment equipment, in particular to a waste gas heat exchange device which comprises a first heat exchange reaction pipe barrel, a first round end socket is arranged at the left end of the first heat exchange reaction pipe barrel, and the right side of the first round end socket is fixedly connected with the left end of the first heat exchange reaction pipe barrel through a flange and a bolt. The left end of the cold air pipe barrel I is fixedly connected with the right end of the heat exchange reaction pipe barrel I through a flange and a bolt, and a plurality of cold air thin pipes are arranged in the heat exchange reaction pipe barrel I. According to the utility model, the upper semicircular sheets and the lower semicircular sheets are arranged in the heat exchange reaction pipe barrel I and the heat exchange reaction pipe barrel II in a staggered manner, so that the flowing speed of waste gas can be slowed down; the time of waste gas in the device is prolonged, the heat exchange effect is improved, the efficiency of electrostatic adsorption equipment for adsorbing harmful particles in the waste gas is improved, and a switch chain is used for driving a switch chain wheel to rotate by arranging a first inlet pipe chain wheel valve and a second inlet pipe chain wheel valve, so that a switch valve is more convenient to rotate.

Description

Technical Field

[0001] The utility model relates to the technical field of waste gas treatment equipment, in particular to a waste gas heat exchange device. Background Art

[0002] Waste gas purification mainly refers to the work of treating industrial waste gas generated in industrial sites, such as dust particles, flue gas soot, odor gas, and toxic and harmful gases. Generally, textile printing and dyeing factories will generate a large amount of waste gas, which contains harmful particles and needs to be adsorbed and treated by an electrostatic adsorption device before discharge to reduce harmful particles. For waste gas with a lower temperature, the electrostatic adsorption device has a higher efficiency in adsorbing harmful particles in the waste gas. Since the waste gas temperature is generally high, a cooling device is usually used to cool the waste gas.

[0003] In the prior art, the cooling device adopted has a short residence time of the waste gas inside the heat exchange device, resulting in a poor cooling effect on the waste gas, thus affecting the efficiency of the electrostatic adsorption device in adsorbing harmful particles in the waste gas. Moreover, most of the existing heat exchange device switch valve devices are handwheel rotation type valves, and the rotation of opening and closing the valve is relatively strenuous and not simple enough. Summary of the Utility Model

[0004] The utility model provides a waste gas heat exchange device.

[0005] In order to achieve the above object, the utility model adopts the following technical solutions:

[0006] An exhaust gas heat exchange device, comprising a first heat exchange reaction tube, a second heat exchange reaction tube, a mounting base plate, a first circular head, a second circular head, a first cold gas tube, a second cold gas tube, a maintenance platform, a platform guardrail, platform legs, a manual ladder, an exhaust gas inlet pipe, a cold gas inlet pipe, a first inlet pipe sprocket valve, a second inlet pipe sprocket valve, an exhaust gas outlet pipe, a cold gas outlet pipe, a first outlet pipe switch valve, a second outlet pipe switch valve, an upper inlet gas port one, an intermediate connecting pipe one, an upper inlet gas port two, an intermediate connecting pipe two, cold gas thin tubes, upper semi-circular pieces, lower semi-circular pieces, mounting supports, sprocket supports, switch sprockets, chain support frames, chain restraint rings, switch chains, wide chain grooves, thin chain grooves, lower support seats, intermediate support seats. The left end of the first heat exchange reaction tube is provided with a first circular head, and the right side of the first circular head is fixedly connected to the left end of the first heat exchange reaction tube through a flange and bolts. The right end of the first heat exchange reaction tube is provided with a first cold gas tube, and the left end of the first cold gas tube is fixedly connected to the right end of the first heat exchange reaction tube through a flange and bolts. A number of cold gas thin tubes are arranged inside the first heat exchange reaction tube, and the right ends of the cold gas thin tubes are fixedly connected and communicated with the left end of the first cold gas tube. The number of cold gas thin tubes is evenly distributed in an annular array with the axis of the first heat exchange reaction tube as the axis. A number of upper semi-circular pieces are arranged on the upper side inside the first heat exchange reaction tube, and the upper ends of the upper semi-circular pieces are fixedly connected to the upper end inside the first heat exchange reaction tube. The number of upper semi-circular pieces is evenly arranged in a rectangular array from left to right on the upper side inside the first heat exchange reaction tube. A number of lower semi-circular pieces are arranged on the lower side inside the first heat exchange reaction tube, and the lower ends of the lower semi-circular pieces are fixedly connected to the lower end inside the first heat exchange reaction tube. The number of lower semi-circular pieces is evenly arranged in a rectangular array from left to right on the lower side inside the first heat exchange reaction tube. The upper semi-circular pieces and the lower semi-circular pieces are arranged alternately, and all the cold gas thin tubes pass through and are fixedly connected to the upper semi-circular pieces or the lower semi-circular pieces. The upper left side of the first heat exchange reaction tube is provided with an upper inlet gas port one, and the lower end of the upper inlet gas port one is fixedly connected and communicated with the upper left side of the first heat exchange reaction tube. The upper end of the upper inlet gas port one is provided with an exhaust gas inlet pipe, and the lower rear end of the exhaust gas inlet pipe is fixedly connected and communicated with the upper end of the upper inlet gas port one through a flange and bolts. A first inlet pipe sprocket valve is installed on the exhaust gas inlet pipe. The first inlet pipe sprocket valve includes a mounting support, and the mounting support is fixedly connected to the exhaust gas inlet pipe. The outer side of the mounting support is provided with a sprocket support, and the inner end of the sprocket support is fixedly connected to the outer side of the mounting support through bolts. A rotating shaft is arranged in the sprocket support, and the rotating shaft passes through the mounting support and the sprocket support and is rotatably connected thereto. A circular plate is fixed to the inner end of the rotating shaft and can rotate inside the exhaust gas inlet pipe following the rotating shaft. A switch sprocket is arranged at the outer end of the rotating shaft, and the center of the switch sprocket is connected to the outer end of the rotating shaft through a key. A number of wide chain grooves are formed on the cylindrical side of the switch sprocket, and the number of wide chain grooves is evenly distributed in an annular array with the axis of the switch sprocket as the center on the cylindrical side of the switch sprocket. Thin chain grooves are arranged between all the wide chain grooves, and both ends of the thin chain grooves are communicated with the wide chain grooves.A switch chain is installed in the plurality of wide chain grooves and narrow chain grooves. The chain links in the switch chain that are perpendicular to the end face of the switch sprocket are stuck in the wide chain grooves, and the chain links parallel to the end face of the switch sprocket are stuck in the narrow chain grooves. A chain support frame is provided outside the switch sprocket. The chain support frame is in an inverted T shape. The upper end of the chain support frame is fixedly connected to the center outside the switch sprocket through bolts. At both the left and right ends of the lower side of the chain support frame, chain binding rings are fixed. The switch chain passes through the chain binding rings. At the upper end of the first cold air cylinder, there is an upper air inlet port two. The lower end of the upper air inlet port two is fixedly connected and communicated with the upper end of the first cold air cylinder. At the upper end of the upper air inlet port two, there is a cold air inlet pipe. The lower right end of the cold air inlet pipe is fixedly connected and communicated with the upper end of the upper air inlet port two through a flange and bolts. An inlet pipe sprocket valve two is installed on the cold air inlet pipe. The inlet pipe sprocket valve two is exactly the same as the inlet pipe sprocket valve. Below the first heat exchange reaction tube cylinder, there is a second heat exchange reaction tube cylinder. The lower right side of the first heat exchange reaction tube cylinder is fixedly connected and communicated with the upper end of the second heat exchange reaction tube cylinder through an intermediate connecting pipe one. At the left end of the second heat exchange reaction tube cylinder, there is a second round head seal. The right side of the second round head seal is fixedly connected to the left end of the second heat exchange reaction tube cylinder through a flange and bolts. At the right end of the second heat exchange reaction tube cylinder, there is a second cold air cylinder. The left end of the second cold air cylinder is fixedly connected to the right end of the second heat exchange reaction tube cylinder through a flange and bolts. The internal structure of the second heat exchange reaction tube cylinder is exactly the same as the internal structure of the first heat exchange reaction tube cylinder. The upper end of the second cold air cylinder is fixedly connected and communicated with the lower end of the first cold air cylinder through an intermediate connecting pipe two.,

[0007] Further, an exhaust gas outlet pipe is provided at the lower end of the second heat exchange reaction tube cylinder. The upper end of the exhaust gas outlet pipe is fixedly connected and communicated with the lower end of the second heat exchange reaction tube cylinder. An outlet pipe switch valve one is installed on the exhaust gas outlet pipe. A cold air outlet pipe is provided at the lower end of the second cold air cylinder. The upper end of the cold air outlet pipe is fixedly connected and communicated with the lower end of the second cold air cylinder. An outlet pipe switch valve two is installed on the cold air outlet pipe.

[0008] Further, an installation base plate is provided on the lower side of the second heat exchange reaction tube cylinder. Between the installation base plate and the second heat exchange reaction tube cylinder, there are a plurality of lower support seats. The bottoms of the plurality of lower support seats are fixedly connected to the installation base plate. The upper ends of the plurality of lower support seats are fixedly connected to the lower side of the second heat exchange reaction tube cylinder.

[0009] Further, between the second heat exchange reaction tube cylinder and the first heat exchange reaction tube cylinder, there are a plurality of intermediate support seats. The upper ends of the plurality of intermediate support seats are fixedly connected to the lower side of the first heat exchange reaction tube cylinder. The lower ends of the plurality of intermediate support seats are fixedly connected to the upper side of the second heat exchange reaction tube cylinder.

[0010] Further, a maintenance platform is provided between the first cold air tube barrel and the second cold air tube barrel. Four ends of the lower side of the maintenance platform are each provided with a platform support leg. The upper end of the platform support leg is fixedly connected to the lower side of the maintenance platform, and the lower end of the platform support leg is fixedly connected to the installation base plate.

[0011] Further, a circle of platform guardrails is provided around the upper side of the maintenance platform. Four ends of the platform guardrails are fixedly connected to the upper ends of the platform support legs by bolts. An artificial ladder is provided on the front side of the maintenance platform. The upper end of the artificial ladder is fixedly connected to the platform guardrail by bolts, and the lower end of the artificial ladder is fixedly connected to the installation base plate.

[0012] Beneficial effects: By arranging the upper semi-circular pieces and the lower semi-circular pieces alternately inside the first heat exchange reaction tube barrel and the second heat exchange reaction tube barrel, the flow rate of the waste gas inside the first heat exchange reaction tube barrel and the second heat exchange reaction tube barrel can be slowed down, the time of the waste gas inside the first heat exchange reaction tube barrel and the second heat exchange reaction tube barrel can be increased, the heat exchange effect can be improved, the efficiency of the electrostatic adsorption device for adsorbing harmful particulate matters in the waste gas can be improved, and by arranging the first inlet pipe sprocket valve and the second inlet pipe sprocket valve, using the switch chain to drive the switch sprocket to rotate, the rotation of the switch valve can be replaced manually, making the rotation of the switch valve more convenient. Description of the Drawings

[0013] Figure 1 is the three-dimensional structure schematic diagram of the present utility model Figure I ;

[0014] Figure 2 is the three-dimensional structure schematic diagram of the present utility model Figure II ;

[0015] Figure 3 is the front view structure schematic diagram of the present utility model;

[0016] Figure 4 is the three-dimensional structure schematic diagram of the first heat exchange reaction tube barrel of the present utility model;

[0017] Figure 5 is the three-dimensional structure schematic diagram inside the first heat exchange reaction tube barrel of the present utility model;

[0018] Figure 6 is the three-dimensional structure schematic diagram of the first inlet pipe sprocket valve of the present utility model;

[0019] Figure 7 is the partial enlarged view A of the present utility model;

[0020] Reference numerals: 1 first heat exchange reaction tube barrel, 2 second heat exchange reaction tube barrel, 3 mounting base plate, 4 first circular head, 5 second circular head, 7 first cold gas tube barrel, 8 second cold gas tube barrel, 9 maintenance platform, 10 platform guardrail, 11 platform support leg, 12 manual ladder, 13 waste gas inlet pipe, 14 cold gas inlet pipe, 15 inlet pipe sprocket valve one, 16 inlet pipe sprocket valve two, 17 waste gas outlet pipe, 18 cold gas outlet pipe, 19 outlet pipe switch valve one, 20 outlet pipe switch valve two, 21 upper inlet gas port one, 22 intermediate connecting pipe one, 23 upper inlet gas port two, 24 intermediate connecting pipe two, 25 cold gas fine pipe, 26 upper semi-circular piece, 27 lower semi-circular piece, 28 mounting support, 29 sprocket support, 30 switch sprocket, 31 chain support frame, 32 chain binding ring, 33 switch chain, 34 wide chain groove, 35 narrow chain groove, 36 lower support seat, 37 intermediate support seat. Detailed implementation manners

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0022] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0023] Refer to Figures 1-7, an exhaust gas heat exchange device, including a heat exchange reaction tube barrel 1, a heat exchange reaction tube barrel 2, a mounting base plate 3, a circular head 1 4, a circular head 2 5, a cold air tube barrel 1 7, a cold air tube barrel 2 8, a maintenance platform 9, a platform guardrail 10, platform legs 11, a manual ladder 12, an exhaust gas inlet pipe 13, a cold air inlet pipe 14, an inlet pipe sprocket valve 1 15, an inlet pipe sprocket valve 2 16, an exhaust gas outlet pipe 17, a cold air outlet pipe 18, an outlet pipe switch valve 1 19, an outlet pipe switch valve 2 20, an upper air inlet port 1 21, an intermediate connecting pipe 1 22, an upper air inlet port 2 23, an intermediate connecting pipe 2 24, a cold air thin tube 25, an upper semi-circular piece 26, a lower semi-circular piece 27, a mounting support 28, a sprocket support 29, a switch sprocket 30, a chain support frame 31, a chain binding ring 32, a switch chain 33, a wide chain groove 34, a thin chain groove 35, a lower support seat 36, an intermediate support seat 37. A circular head 1 4 is provided at the left end of the heat exchange reaction tube barrel 1. The right side of the circular head 1 4 and the left end of the heat exchange reaction tube barrel 1 are fixedly connected by a flange and bolts. A cold air tube barrel 1 7 is provided at the right end of the heat exchange reaction tube barrel 1. The left end of the cold air tube barrel 1 7 and the right end of the heat exchange reaction tube barrel 1 are fixedly connected by a flange and bolts. A number of cold air thin tubes 25 are provided inside the heat exchange reaction tube barrel 1. The right end of the cold air thin tube 25 is fixedly connected and communicated with the left end of the cold air tube barrel 1 7. The number of cold air thin tubes 25 is evenly distributed in a circular array with the central axis of the heat exchange reaction tube barrel 1 as the axis. A number of upper semi-circular pieces 26 are provided on the upper side inside the heat exchange reaction tube barrel 1. The upper ends of the number of upper semi-circular pieces 26 are fixedly connected to the upper end inside the heat exchange reaction tube barrel 1. The number of upper semi-circular pieces 26 is evenly arranged in a rectangular array from left to right on the upper side inside the heat exchange reaction tube barrel 1. A number of lower semi-circular pieces 27 are provided on the lower side inside the heat exchange reaction tube barrel 1. The lower ends of the number of lower semi-circular pieces 27 are fixedly connected to the lower end inside the heat exchange reaction tube barrel 1. The number of lower semi-circular pieces 27 is evenly arranged in a rectangular array from left to right on the lower side inside the heat exchange reaction tube barrel 1. The upper semi-circular pieces 26 and the lower semi-circular pieces 27 are arranged alternately. The number of cold air thin tubes 25 all pass through and are fixedly connected with the upper semi-circular pieces 26 or the lower semi-circular pieces 27. An upper air inlet port 1 21 is provided on the upper left side of the heat exchange reaction tube barrel 1. The lower end of the upper air inlet port 1 21 is fixedly connected and communicated with the upper left side of the heat exchange reaction tube barrel 1. An exhaust gas inlet pipe 13 is provided at the upper end of the upper air inlet port 1 21. The lower rear end of the exhaust gas inlet pipe 13 is fixedly connected and communicated with the upper end of the upper air inlet port 1 21 by a flange and bolts. An inlet pipe sprocket valve 1 15 is installed on the exhaust gas inlet pipe 13. The inlet pipe sprocket valve 1 15 includes a mounting support 28. The mounting support 28 is fixedly connected to the exhaust gas inlet pipe 13. A sprocket support 29 is provided outside the mounting support 28. The inner end of the sprocket support 29 and the outside of the mounting support 28 are fixedly connected by bolts. A rotating shaft is provided in the sprocket support 29. The rotating shaft passes through the mounting support 28 and the sprocket support 29 and is rotatably connected thereto.A circular plate is fixed to the inner end of the rotating shaft and can rotate with the rotating shaft inside the exhaust gas inlet pipe 13. A switch sprocket 30 is provided at the outer end of the rotating shaft. The center of the switch sprocket 30 is connected to the outer end of the rotating shaft by a key. A number of wide chain grooves 34 are formed on the cylindrical side of the switch sprocket 30. The number of wide chain grooves 34 is evenly distributed in an annular array on the cylindrical side of the switch sprocket 30 with the central axis of the switch sprocket 30 as the axis. Fine chain grooves 35 are provided between the number of wide chain grooves 34. Both ends of the fine chain grooves 35 are communicated with the wide chain grooves 34. A switch chain 33 is installed in the number of wide chain grooves 34 and the fine chain grooves 35. The link of the switch chain 33 perpendicular to the end face of the switch sprocket 30 is stuck in the wide chain groove 34, and the link parallel to the end face of the switch sprocket 30 is stuck in the fine chain groove 35. A chain support frame 31 is provided outside the switch sprocket 30. The chain support frame 31 is in an inverted T shape. The upper end of the chain support frame 31 is fixedly connected to the center outside the switch sprocket 30 by bolts. Chain restraint rings 32 are fixed to both the left and right ends of the lower side of the chain support frame 31. The switch chain 33 passes through the chain restraint rings 32. An upper air inlet port two 23 is provided at the upper end of the cold air cylinder one 7. The lower end of the upper air inlet port two 23 is fixedly connected and communicated with the upper end of the cold air cylinder one 7. An air inlet pipe for cold air is provided at the upper end of the upper air inlet port two 23. The lower right end of the cold air inlet pipe 14 is fixedly connected and communicated with the upper end of the upper air inlet port two 23 by a flange and bolts. An inlet pipe sprocket valve two 16 is installed on the cold air inlet pipe 14. The inlet pipe sprocket valve two 16 is exactly the same as the inlet pipe sprocket valve. A heat exchange reaction tube cylinder two 2 is provided below the heat exchange reaction tube cylinder one. The lower right end of the heat exchange reaction tube cylinder one is fixedly connected and communicated with the upper end of the heat exchange reaction tube cylinder two 2 by an intermediate connecting pipe one 22. A circular head two 5 is provided at the left end of the heat exchange reaction tube cylinder two 2. The right side of the circular head two 5 is fixedly connected to the left end of the heat exchange reaction tube cylinder two 2 by a flange and bolts. A cold air cylinder two 8 is provided at the right end of the heat exchange reaction tube cylinder two 2. The left end of the cold air cylinder two 8 is fixedly connected to the right end of the heat exchange reaction tube cylinder two 2 by a flange and bolts. The internal structure of the heat exchange reaction tube cylinder two 2 is exactly the same as the internal structure of the heat exchange reaction tube cylinder one. The upper end of the cold air cylinder two 8 is fixedly connected and communicated with the lower end of the cold air cylinder one 7 by an intermediate connecting pipe two 24.,

[0024] An exhaust gas outlet pipe 17 is provided at the lower end of the heat exchange reaction tube cylinder two 2. The upper end of the exhaust gas outlet pipe 17 is fixedly connected and communicated with the lower end of the heat exchange reaction tube cylinder two 2. An outlet pipe switch valve one 19 is installed on the exhaust gas outlet pipe 17. A cold air outlet pipe 18 is provided at the lower end of the cold air cylinder two 8. The upper end of the cold air outlet pipe 18 is fixedly connected and communicated with the lower end of the cold air cylinder two 8. An outlet pipe switch valve two 20 is installed on the cold air outlet pipe 18.

[0025] A mounting base plate 3 is provided on the lower side of the second heat exchange reaction tube barrel 2. A number of lower support seats 36 are provided between the mounting base plate 3 and the second heat exchange reaction tube barrel 2. The bottoms of the number of lower support seats 36 are fixedly connected to the mounting base plate 3, and the upper ends of the number of lower support seats 36 are fixedly connected to the lower side of the second heat exchange reaction tube barrel 2.

[0026] A number of intermediate support seats 37 are provided between the second heat exchange reaction tube barrel 2 and the first heat exchange reaction tube barrel 1. The upper ends of the number of intermediate support seats 37 are fixedly connected to the lower side of the first heat exchange reaction tube barrel 1, and the lower ends of the number of intermediate support seats 37 are fixedly connected to the upper side of the second heat exchange reaction tube barrel 2.

[0027] An inspection platform 9 is provided between the first cold air tube barrel 7 and the second cold air tube barrel 8. Platform legs 11 are provided at the four ends of the lower side of the inspection platform 9. The upper ends of the platform legs 11 are fixedly connected to the lower side of the inspection platform 9, and the lower ends of the platform legs 11 are fixedly connected to the mounting base plate 3.

[0028] A platform guardrail 10 is provided around the upper side of the inspection platform 9. The four ends of the platform guardrail 10 are fixedly connected to the upper ends of the platform legs 11 by bolts. An artificial ladder 12 is provided on the front side of the inspection platform 9. The upper end of the artificial ladder 12 is fixedly connected to the platform guardrail 10 by bolts, and the lower end of the artificial ladder 12 is fixedly connected to the mounting base plate 3.

[0029] Working principle:

[0030] Through the upper semi-circular pieces 26 and lower semi-circular pieces 27 arranged alternately inside the first heat exchange reaction tube barrel 1 and the second heat exchange reaction tube barrel 2, the flow rate of the waste gas inside the first heat exchange reaction tube barrel 1 and the second heat exchange reaction tube barrel 2 can be slowed down, the time of the waste gas inside the first heat exchange reaction tube barrel 1 and the second heat exchange reaction tube barrel 2 can be increased, the heat exchange effect can be improved, the efficiency of the electrostatic adsorption device for adsorbing harmful particulate matter in the waste gas can be improved, and by setting the inlet pipe sprocket valve 15 and the inlet pipe sprocket valve 16, using the switch chain 33 to be stuck on the cylindrical side of the switch sprocket 30 and driving the switch sprocket 30 to rotate, the rotation of the switch valve can be replaced manually, making the rotation of the switch valve more convenient.

[0031] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. An exhaust gas heat exchange device, characterized in that: It includes a heat exchange reaction tube barrel one (1), a heat exchange reaction tube barrel two (2), an installation base plate (3), a round head one (4), a round head two (5), a cold air tube barrel one (7), a cold air tube barrel two (8), a maintenance platform (9), a platform guardrail (10), platform legs (11), an artificial ladder (12), an exhaust gas inlet pipe (13), a cold air inlet pipe (14), an inlet pipe sprocket valve one (15), an inlet pipe sprocket valve two (16), an exhaust gas outlet pipe (17), a cold air outlet pipe (18), an outlet pipe switch valve one (19), an outlet pipe switch valve two (20), an upper inlet air port one (21), an intermediate connecting pipe one (22), an upper inlet air port two (23), an intermediate connecting pipe two (24), cold air thin pipes (25), upper semi-circular pieces (26), lower semi-circular pieces (27), installation supports (28), sprocket supports (29), switch sprockets (30), chain support frames (31), chain binding rings (32), switch chains (33), wide chain grooves (34), thin chain grooves (35), lower support seats (36), and intermediate support seats (37). A round head one (4) is provided at the left end of the heat exchange reaction tube barrel one. The right side of the round head one (4) is fixedly connected to the left end of the heat exchange reaction tube barrel one through a flange and bolts. A cold air tube barrel one (7) is provided at the right end of the heat exchange reaction tube barrel one (1). The left end of the cold air tube barrel one (7) is fixedly connected to the right end of the heat exchange reaction tube barrel one (1) through a flange and bolts. A number of cold air thin pipes (25) are provided inside the heat exchange reaction tube barrel one (1). The right end of the cold air thin pipes (25) is fixedly connected and communicated with the left end of the cold air tube barrel one (7). The number of cold air thin pipes (25) is evenly distributed in a circular array with the central axis of the heat exchange reaction tube barrel one (1) as the axis. A number of upper semi-circular pieces (26) are provided on the upper side inside the heat exchange reaction tube barrel one (1). The upper ends of the number of upper semi-circular pieces (26) are fixedly connected to the upper end inside the heat exchange reaction tube barrel one (1). The number of upper semi-circular pieces (26) is evenly arranged in a rectangular array from left to right on the upper side inside the heat exchange reaction tube barrel one (1). A number of lower semi-circular pieces (27) are provided on the lower side inside the heat exchange reaction tube barrel one (1). The lower ends of the number of lower semi-circular pieces (27) are fixedly connected to the lower end inside the heat exchange reaction tube barrel one (1). The number of lower semi-circular pieces (27) is evenly arranged in a rectangular array from left to right on the lower side inside the heat exchange reaction tube barrel one (1). The upper semi-circular pieces (26) and the lower semi-circular pieces (27) are arranged alternately. The number of cold air thin pipes (25) all pass through and are fixedly connected to the upper semi-circular pieces (26) or the lower semi-circular pieces (27). An upper inlet air port one (21) is provided on the upper left side of the heat exchange reaction tube barrel one (1). The lower end of the upper inlet air port one (21) is fixedly connected and communicated with the upper left side of the heat exchange reaction tube barrel one (1). An exhaust gas inlet pipe (13) is provided at the upper end of the upper inlet air port one (21). The lower end at the rear side of the exhaust gas inlet pipe (13) is fixedly connected and communicated with the upper end of the upper inlet air port one (21) through a flange and bolts.An inlet pipe sprocket valve one (15) is installed on the waste gas inlet pipe (13). The inlet pipe sprocket valve one (15) includes a mounting support (28). The mounting support (28) is fixedly connected to the waste gas inlet pipe (13). A sprocket support (29) is provided outside the mounting support (28). The inner end of the sprocket support (29) is fixedly connected to the outside of the mounting support (28) by bolts. A rotating shaft is provided in the sprocket support (29). The rotating shaft passes through the mounting support (28) and the sprocket support (29) and is rotatably connected thereto. A circular plate is fixed to the inner end of the rotating shaft and can rotate inside the waste gas inlet pipe (13) along with the rotating shaft. A switch sprocket (30) is provided at the outer end of the rotating shaft. The center of the switch sprocket (30) is coupled to the outer end of the rotating shaft by a key. A plurality of wide chain grooves (34) are formed on the cylindrical side surface of the switch sprocket (30). The plurality of wide chain grooves (34) are uniformly distributed in an annular array on the cylindrical side surface of the switch sprocket (30) with the axis of the switch sprocket (30) as the center. Fine chain grooves (35) are provided between the plurality of wide chain grooves (34). Both ends of the fine chain grooves (35) are communicated with the wide chain grooves (34). A switch chain (33) is installed in the plurality of wide chain grooves (34) and the fine chain grooves (35). The chain links in the switch chain (33) that are perpendicular to the end surface of the switch sprocket (30) are stuck in the wide chain grooves (34), and the chain links parallel to the end surface of the switch sprocket (30) are stuck in the fine chain grooves (35). A chain support frame (31) is provided outside the switch sprocket (30). The chain support frame (31) is in an inverted T shape. The upper end of the chain support frame (31) is fixedly connected to the center of the outside of the switch sprocket (30) by bolts. Binding chain rings (32) are fixed to both the left and right ends of the lower side of the chain support frame (31). The switch chain (33) passes through the binding chain rings (32). An upper inlet pipe port two (23) is provided at the upper end of the cold air pipe cylinder one (7). The lower end of the upper inlet pipe port two (23) is fixedly connected and communicated with the upper end of the cold air pipe cylinder one (7). A cold air inlet pipe is provided at the upper end of the upper inlet pipe port two (23). The lower right end of the cold air inlet pipe (14) is fixedly connected and communicated with the upper end of the upper inlet pipe port two (23) by a flange and bolts. An inlet pipe sprocket valve two (16) is installed on the cold air inlet pipe (14). The inlet pipe sprocket valve two (16) is exactly the same as the inlet pipe sprocket valve. A heat exchange reaction pipe cylinder two (2) is provided below the exchange reaction pipe cylinder one. The lower right end of the exchange reaction pipe cylinder one is fixedly connected and communicated with the upper end of the heat exchange reaction pipe cylinder two (2) by an intermediate connecting pipe one (22). A circular head two (5) is provided at the left end of the heat exchange reaction pipe cylinder two (2). The right side of the circular head two (5) is fixedly connected to the left end of the heat exchange reaction pipe cylinder two (2) by a flange and bolts. A cold air pipe cylinder two (8) is provided at the right end of the heat exchange reaction pipe cylinder two (2). The left end of the cold air pipe cylinder two (8) is fixedly connected to the right end of the heat exchange reaction pipe cylinder two (2) by a flange and bolts.The internal structure of the second heat exchange reaction tube cylinder (2) is exactly the same as that of the first heat exchange reaction tube cylinder (1). The upper end of the second cold gas tube cylinder (8) is fixed and communicated with the lower end of the first cold gas tube cylinder (7) through the second intermediate connecting tube (24).

2. The waste gas heat exchange device according to claim 1, characterized in that: An exhaust gas outlet pipe (17) is provided at the lower end of the second heat exchange reaction tube barrel (2). The upper end of the exhaust gas outlet pipe (17) is fixedly connected and communicated with the lower end of the second heat exchange reaction tube barrel (2). An outlet pipe switch valve I (19) is installed on the exhaust gas outlet pipe (17). A cold air outlet pipe (18) is provided at the lower end of the second cold air tube barrel (8). The upper end of the cold air outlet pipe (18) is fixedly connected and communicated with the lower end of the second cold air tube barrel (8). An outlet pipe switch valve II (20) is installed on the cold air outlet pipe (18).

3. An exhaust gas heat exchange device according to claim 1, characterized in that: An installation base plate (3) is provided on the lower side of the second heat exchange reaction tube barrel (2). A plurality of lower support seats (36) are provided between the installation base plate (3) and the second heat exchange reaction tube barrel (2). The bottoms of the plurality of lower support seats (36) are fixedly connected to the installation base plate (3), and the upper ends of the plurality of lower support seats (36) are fixedly connected to the lower side of the second heat exchange reaction tube barrel (2).

4. An exhaust gas heat exchange device according to claim 1, characterized in that: A plurality of intermediate support seats (37) are provided between the second heat exchange reaction tube barrel (2) and the first heat exchange reaction tube barrel (1). The upper ends of the plurality of intermediate support seats (37) are fixedly connected to the lower side of the first heat exchange reaction tube barrel (1), and the lower ends of the plurality of intermediate support seats (37) are fixedly connected to the upper side of the second heat exchange reaction tube barrel (2).

5. An exhaust gas heat exchange device according to claim 1, characterized in that: A maintenance platform (9) is provided between the first cold air tube barrel (7) and the second cold air tube barrel (8). Platform legs (11) are provided at the four ends of the lower side of the maintenance platform (9). The upper ends of the platform legs (11) are fixedly connected to the lower side of the maintenance platform (9), and the lower ends of the platform legs (11) are fixedly connected to the installation base plate (3).

6. The waste gas heat exchange device according to claim 1, characterized in that: A platform guardrail (10) is provided around the upper side of the maintenance platform (9). The four ends of the platform guardrail (10) are fixedly connected to the upper ends of the platform legs (11) by bolts. An artificial ladder (12) is provided on the front side of the maintenance platform (9). The upper end of the artificial ladder (12) is fixedly connected to the platform guardrail (10) by bolts, and the lower end of the artificial ladder (12) is fixedly connected to the installation base plate (3).

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