A catalytic furnace with a built-in easy-to-maintain heat exchanger

Abstract

The present invention relates to the field of waste gas treatment technology, and in particular to a catalytic furnace with a built-in easy-to-maintain heat exchanger, comprising a combustion furnace body and a catalytic bed. The catalytic furnace with a built-in easy-to-maintain heat exchanger of the present invention is provided with an externally threaded guide assembly tube having an externally internally threaded sealing assembly tube welded and fixed on the front side wall of the combustion furnace body, and a built-in split filter device is provided on the serpentine top internal smoke conveying pipe and the serpentine bottom internal smoke conveying pipe side wall inside the heat exchange chamber, so as to facilitate the particulate matter filtering of the smoke inside the internal smoke conveying pipe, avoid the adhesion of the particulate matter inside the smoke in the internal smoke conveying pipe, and maintain the internal heat exchange efficiency stable; the split filter device is controlled by the internally threaded sealing assembly tube, which greatly facilitates the loading and unloading operation of the internal filtering mechanism, reduces the difficulty of later cleaning and maintenance operations, and reduces the construction period, thereby improving the production efficiency of the catalytic furnace; and ensures sufficient travel while improving the heat conduction efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of waste gas treatment, in particular to a catalytic furnace with a built-in easy-to-maintain heat exchanger. Background Art

[0002] Economic and social development and the demand for industrialization have made catalytic technology, especially catalytic combustion technology, increasingly become an indispensable industrial technology. In the fields of chemical industry, energy or automobile, the treatment of harmful gases is mostly carried out by gas-solid catalytic reaction. Harmful gases flow through the solid catalyst bed in a fluid state to achieve the reaction. Generally, precious metals or transition elements are used as catalysts. An important parameter for measuring the efficiency of gas-solid catalytic reaction is the surface area ratio, that is, the contact surface area between the harmful gas and the catalyst when passing through the catalyst. For this reason, the catalyst is usually made into particles to maximize the surface area. The diameter of the particle catalyst is between a few and tens of nanometers.

[0003] After the catalytic combustion reaction is completed, the flue gas will be discharged directly to the outside, resulting in serious heat loss. In order to improve the heat recovery efficiency and reduce the heating energy consumption, a heat exchange mechanism will be installed in the exhaust section. Most of the current heat exchange mechanisms have a fixed structure and no built-in particulate matter filter. As a result, the internal exhaust pipe is prone to adhesion to the inner wall after long-term use, causing the heat exchange efficiency to deteriorate with the use time, requiring regular cleaning and maintenance. However, the current maintenance and cleaning of the internal exhaust pipe is very troublesome, and the loading and unloading operation cycle is very long, which seriously affects the production efficiency of the equipment. Summary of the invention

[0004] The technical problem to be solved by the present invention is: in order to solve the problems existing in the above-mentioned background technology, an improved catalytic furnace with a built-in easy-to-maintain heat exchanger is provided to solve the problem that most of the current heat exchange mechanisms have a fixed structure and no built-in particulate matter filtering device, which causes the internal smoke exhaust pipe to easily stick to the inner wall after long-term use, resulting in the heat exchange efficiency deteriorating with the use time, requiring regular cleaning and maintenance, while the current internal smoke exhaust pipe maintenance and cleaning are very troublesome, the loading and unloading operation cycle is very long, and the production efficiency of the equipment is seriously affected.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a catalytic furnace with a built-in easy-to-maintain heat exchanger, including a combustion furnace body, a catalytic bed, a flue gas discharge pipe, a flue gas discharge pipe, a temperature sensor and an external instrument for cooperating with the temperature sensor to display the temperature value. The interior of the combustion furnace body is divided into a combustion catalytic chamber and a heat exchange chamber by a longitudinal partition. The heat exchange chamber is provided with a serpentine top internal smoke conveying pipe connected to the flue gas discharge pipe and a serpentine bottom internal smoke conveying pipe connected to the flue gas discharge pipe. The serpentine top internal smoke conveying pipe A segmented heat exchange plate is fixedly connected between the tube and the serpentine bottom-mounted internal smoke conveying pipe, an externally threaded guide assembly pipe connected to the interior of the heat exchange chamber is welded and fixed on the front side wall of the combustion furnace body, and lateral loading and unloading holes for a built-in split filtering device are provided on the outer side walls of the serpentine top-mounted internal smoke conveying pipe and the serpentine bottom-mounted internal smoke conveying pipe at the position of the externally threaded guide assembly pipe, the external thread of the externally threaded guide assembly pipe is connected to an internally threaded sealing assembly cylinder, and the inner side surface of the internally threaded sealing assembly cylinder and the split filtering device are axially fixedly connected by an internal connecting rod.

[0006] Furthermore, in order to facilitate heat exchange, the serpentine top internal smoke duct and the serpentine bottom internal smoke duct include a transverse smoke duct and side smoke ducts fixed on both sides of the transverse smoke duct, and the segmented heat exchange plate includes a first heat exchange plate body sleeved and fixed on the outside of the side smoke duct and a second heat exchange plate ladder fixed on the outer side wall of the transverse smoke duct at the corresponding position.

[0007] Furthermore, in order to cooperate with internal cleaning and maintenance, the split filtering device includes a metal filter cartridge inserted into the horizontal smoke duct from the lateral loading and unloading hole, a fixed bracket frame fixed on the inner side of the metal filter cartridge, an external sealing cover plate located inside the lateral loading and unloading hole, and an internal connecting rod for fixing the fixed bracket frame and the external sealing cover plate. The metal filter cartridge is provided with a smoke inlet opening at the end near the smoke inlet port, and the inner side surface of the smoke inlet opening of the metal filter cartridge has an inwardly protruding integrated metal limit ring.

[0008] Furthermore, in order to improve the sealing performance, there is no gap between the outer arc surface of the metal filter tube and the inner arc connecting surface of the horizontal smoke guide tube, there is no gap between the inner surface of the side loading and unloading hole and the outer connecting surface of the external sealing cover plate, the inner diameter of the side loading and unloading hole gradually decreases from the outside to the inside, and the outer diameter of the external sealing cover plate decreases from the outside to the inside.

[0009] Furthermore, in order to cooperate with the internal smoke guide, the right side surface of the longitudinal partition is fixedly connected with a lateral first smoke guide pipe for connecting the combustion catalytic chamber with the serpentine top internal smoke guide pipe and a lateral second smoke guide pipe for connecting the combustion catalytic chamber with the serpentine bottom internal smoke guide pipe.

[0010] Furthermore, in order to facilitate external control, a regular hexagonal external control groove for convenient rotation control is provided on the outer side surface of the internal thread sealing assembly cylinder.

[0011] Furthermore, in order to improve the internal support and stability, the lower surface of the first heat exchange plate body has downwardly protruding integral bottom support feet on both sides, and the bottom support feet are fixedly installed on the bottom surface of the heat exchange chamber by longitudinal bolts.

[0012] Furthermore, in order to facilitate internal temperature monitoring, the temperature sensor is fixedly installed on the outer side of the internal connecting rod, and an external assembly groove for installing an external instrument is opened on the outer side of the internal threaded sealing assembly cylinder. The external instrument is inserted into the external assembly groove and fixedly connected to the outer side of the internal threaded sealing assembly cylinder. The output end of the temperature sensor is electrically connected to the receiving end of the external instrument through the internal connecting rod and the internal signal transmission line of the internal linkage rod.

[0013] The beneficial effects of the present invention are:

[0014] (1) The catalytic furnace with a built-in easy-to-maintain heat exchanger of the present invention is provided with an external threaded guide assembly tube with an external internal threaded sealing assembly tube welded and fixed on the front side wall of the combustion furnace body, and a built-in split filtering device is provided on the side wall of the serpentine top internal smoke conveying pipe and the serpentine bottom internal smoke conveying pipe inside the heat exchange chamber, so as to facilitate the particulate matter filtering of the smoke inside the internal smoke conveying pipe, avoid the particulate matter inside the smoke from adhering in the internal smoke conveying pipe, and maintain the internal heat exchange efficiency stable;

[0015] (2) The split filter device is controlled by the internal thread sealing assembly cylinder, which greatly facilitates the loading and unloading operation of the internal filter mechanism. It only needs to rotate the internal thread sealing assembly cylinder, which reduces the difficulty of later cleaning and maintenance, shortens the construction period, and thus improves the production efficiency of the catalytic furnace;

[0016] (3) A segmented heat exchange plate is fixedly connected between the top and bottom internal smoke conveying pipes of the serpentine shape, so as to ensure sufficient travel while improving the heat conduction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0018] Figure 1 It is a structural schematic diagram of the present invention.

[0019] Figure 2 It is a structural schematic diagram of the segmented heat exchange plate assembly section in the present invention.

[0020] Figure 3 It is an internal cross-sectional view of the assembly section of the split filter device in the present invention.

[0021] In the figure: 1. combustion furnace body, 2. catalytic bed, 3. flue gas inlet pipe, 4. flue gas outlet pipe, 5. temperature sensor, 6. external instrument, 7. longitudinal partition, 8. combustion catalytic chamber, 9. heat exchange chamber, 10. serpentine top internal smoke pipe, 11. serpentine bottom internal smoke pipe, 12. external thread guide assembly pipe, 13. lateral loading and unloading hole, 14. internal thread sealing assembly cylinder, 15. internal connecting rod, 16. horizontal smoke guide pipe, 17. lateral smoke guide pipe, 18. first heat exchange plate body, 19. second heat exchange plate ladder, 20. metal filter cylinder, 21. fixed bracket frame, 22. external sealing cover plate, 23. internal connecting rod, 24. metal limit ring, 25. lateral first smoke guide pipe, 26. lateral second smoke guide pipe, 27. external control groove, 28. bottom support foot. DETAILED DESCRIPTION

[0022] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0023] Figure 1 and Figure 2 The catalytic furnace with a built-in easy-to-maintain heat exchanger shown in the figure comprises a combustion furnace body 1, a catalytic bed 2, a flue gas discharge pipe 3, a flue gas discharge pipe 4, a temperature sensor 5 and an external instrument 6 for cooperating with the temperature sensor 5 to display the temperature value. The interior of the combustion furnace body 1 is divided into a combustion catalytic chamber 8 and a heat exchange chamber 9 by a longitudinal partition 7. The heat exchange chamber 9 is provided with a serpentine top internal smoke conveying pipe 10 connected to the flue gas discharge pipe 3 and a serpentine bottom internal smoke conveying pipe 11 connected to the flue gas discharge pipe 4. The serpentine top internal smoke conveying pipe 10 and the serpentine bottom internal smoke conveying pipe 11 are connected to the flue gas discharge pipe 4. A segmented heat exchange plate is fixedly connected between the smoke conveying pipes 11, an externally threaded guide assembly pipe 12 connected to the interior of the heat exchange chamber 9 is welded and fixed on the front side wall of the combustion furnace body 1, and lateral loading and unloading holes 13 for built-in split filtering devices are provided on the outer side walls of the serpentine top internal smoke conveying pipe 10 and the serpentine bottom internal smoke conveying pipe 11 corresponding to the position of the externally threaded guide assembly pipe 12, the external threaded guide assembly pipe 12 is connected to the external thread of the internally threaded sealing assembly tube 14, and the inner side surface of the internally threaded sealing assembly tube 14 and the split filtering device are axially fixedly connected by an internal connecting rod 15.

[0024] People use external tools, such as an internal hexagonal wrench, to control the rotation of the internal threaded sealing assembly cylinder 14, which rotates in the opposite direction and moves outward, and drives the external sealing cover plate 22 inside the lateral loading and unloading hole 13 to translate outward through the internal connecting rod 15. The external sealing cover plate 22 drives the metal filter cylinder 20 and the fixed bracket frame 21 to translate outward through the internal connecting rod 23. After the internal threaded sealing assembly cylinder 14 is separated from the external threaded guide assembly tube 12, the split filter device can be separated from the internal smoke conveying pipe through the internal threaded sealing assembly cylinder 14, and people can replace, clean and maintain it, and the operation is very simple and convenient.

[0025] Furthermore, in order to facilitate heat exchange, the serpentine top internal smoke duct 10 and the serpentine bottom internal smoke duct 11 include a transverse smoke duct 16 and side smoke ducts 17 fixed on both sides of the transverse smoke duct 16, and the segmented heat exchange plate includes a first heat exchange plate body 18 sleeved and fixed on the outside of the side smoke duct 17 and a second heat exchange plate ladder 19 fixed on the outer side wall of the transverse smoke duct 16 at the corresponding position.

[0026] Furthermore, in order to cooperate with internal cleaning and maintenance, the split filtering device includes a metal filter cartridge 20 inserted into the horizontal smoke duct 16 from the lateral loading and unloading hole 13, a fixed bracket frame 21 fixed on the inner side of the metal filter cartridge 20, an external sealing cover plate 22 located inside the lateral loading and unloading hole 13, and an internal connecting rod 23 for fixing the fixed bracket frame 21 and the external sealing cover plate 22. The metal filter cartridge 20 is provided with a smoke inlet opening at the end near the smoke inlet port, and the inner side surface of the smoke inlet opening of the metal filter cartridge 20 has an inwardly protruding integral structure metal limit ring 24. Furthermore, in order to improve the sealing performance, there is no gap between the outer arc surface of the metal filter cartridge 20 and the inner arc connecting surface of the horizontal smoke duct 16, and there is no gap between the inner side surface of the lateral loading and unloading hole 13 and the outer connecting surface of the external sealing cover plate 22. The inner diameter of the lateral loading and unloading hole 13 gradually decreases from the outside to the inside, and the outer diameter of the external sealing cover plate 22 decreases from the outside to the inside.

[0027] Furthermore, in order to cooperate with the internal smoke guide, a lateral first smoke guide pipe 25 for connecting the combustion catalytic chamber 8 with the serpentine top internal smoke guide pipe 10 and a lateral second smoke guide pipe 26 for connecting the combustion catalytic chamber 8 with the serpentine bottom internal smoke guide pipe 11 are fixedly connected on the right side surface of the longitudinal partition 7. Furthermore, in order to facilitate external control, a regular hexagonal external control groove 27 for convenient rotation control is opened on the outer side surface of the internal threaded sealing assembly cylinder 14.

[0028] Furthermore, in order to improve the internal support and stability, the bottom support feet 28 of the first heat exchange plate body 18 are provided on both sides of the lower surface, which are an integral structure and protrude downwards. The bottom support feet 28 are fixedly installed on the inner bottom surface of the heat exchange chamber 9 by longitudinal bolts. Furthermore, in order to facilitate the internal temperature monitoring, the temperature sensor 5 is fixedly installed on the outer side of the internal connecting rod 23, and an external assembly groove for installing the external instrument 6 is provided on the outer side of the internal threaded sealing assembly cylinder 14. The external instrument 6 is inserted into the external assembly groove and fixedly connected with the outer side of the internal threaded sealing assembly cylinder 14. The output end of the temperature sensor 5 is electrically connected to the receiving end of the external instrument 6 through the internal signal transmission line of the internal connecting rod 23 and the internal linkage rod 15, and the internal temperature change is monitored in real time by the cooperation of the temperature sensor 5 and the external instrument 6. A heat insulation sleeve can be fixed on the inner wall of the internal connecting rod 23 and the internal linkage rod 15 to improve the safety of the internal signal transmission line.

[0029] The beneficial effects of the present invention are:

[0030] (1) The catalytic furnace with a built-in easy-to-maintain heat exchanger of the present invention is provided with an externally threaded guide assembly tube 12 having an externally internally threaded sealing assembly tube 14 welded and fixed on the front side wall of the combustion furnace body 1, and a built-in split filtering device is provided on the side walls of the serpentine top internal smoke conveying pipe 10 and the serpentine bottom internal smoke conveying pipe 11 inside the heat exchange chamber 9, so as to facilitate the particulate matter filtering of the smoke inside the internal smoke conveying pipe, avoid the particulate matter inside the smoke from adhering in the internal smoke conveying pipe, and maintain the internal heat exchange efficiency stable;

[0031] (2) The split filter device is controlled by the internal thread sealing assembly cylinder 14, which greatly facilitates the loading and unloading operation of the internal filter mechanism. It only needs to rotate the internal thread sealing assembly cylinder 14, which reduces the difficulty of later cleaning and maintenance, reduces the construction period, and thus improves the production efficiency of the catalytic furnace;

[0032] (3) A segmented heat exchange plate is fixedly connected between the top and bottom internal smoke conveying pipes of the serpentine shape, so as to ensure sufficient travel while improving the heat conduction efficiency.

[0033] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A catalytic furnace with a built-in easy-to-maintain heat exchanger, comprising a combustion furnace body (1), a catalytic bed (2), a flue gas inlet pipe (3), a flue gas outlet pipe (4), a temperature sensor (5), and an external instrument (6) for cooperating with the temperature sensor (5) to display a temperature value, wherein: The interior of the combustion furnace body (1) is divided into a combustion catalytic chamber (8) and a heat exchange chamber (9) by a longitudinal partition (7). The interior of the heat exchange chamber (9) is provided with a serpentine top internal smoke conveying pipe (10) connected to the smoke exhaust pipe (3) and a serpentine bottom internal smoke conveying pipe (11) connected to the smoke exhaust pipe (4). A segmented heat exchange plate is fixedly connected between the serpentine top internal smoke conveying pipe (10) and the serpentine bottom internal smoke conveying pipe (11). The combustion furnace body (1) is welded and fixed on the front side wall. There is an externally threaded guide assembly tube (12) connected to the interior of the heat exchange chamber (9); the outer side walls of the serpentine top internal smoke delivery tube (10) and the serpentine bottom internal smoke delivery tube (11) are provided with lateral loading and unloading holes (13) for a built-in split filter device at positions corresponding to the externally threaded guide assembly tube (12); the external thread of the externally threaded guide assembly tube (12) is connected to an internally threaded sealing assembly tube (14); the inner side surface of the internally threaded sealing assembly tube (14) and the split filter device are axially fixedly connected via an internal linkage rod (15); The serpentine top internal smoke conveying pipe (10) and the serpentine bottom internal smoke conveying pipe (11) include a transverse smoke guiding pipe (16) and side smoke guiding pipes (17) fixed on both sides of the transverse smoke guiding pipe (16); the segmented heat exchange plate includes a first heat exchange plate body (18) sleeved and fixed on the outside of the side smoke guiding pipe (17) and a second heat exchange plate ladder (19) fixed on the outer side wall of the transverse smoke guiding pipe (16) at a corresponding position; The split filter device comprises a metal filter cartridge (20) inserted into a transverse smoke guide pipe (16) through a lateral loading and unloading hole (13), a fixed bracket frame (21) fixed on the inner side of the metal filter cartridge (20), an external sealing cover plate (22) located inside the lateral loading and unloading hole (13), and an internal connecting rod (23) for fixedly connecting the fixed bracket frame (21) and the external sealing cover plate (22), wherein the metal filter cartridge (20) is provided with a smoke inlet opening at the end near the smoke inlet port, and the inner side of the smoke inlet opening of the metal filter cartridge (20) is provided with an inwardly protruding integral metal limiting ring (24); A first lateral smoke guide pipe (25) for connecting the combustion catalytic chamber (8) with the serpentine top internal smoke guide pipe (10) and a second lateral smoke guide pipe (26) for connecting the combustion catalytic chamber (8) with the serpentine bottom internal smoke guide pipe (11) are fixedly connected to the right side surface of the longitudinal partition plate (7).

2. The catalytic furnace with a built-in easy-to-maintain heat exchanger according to claim 1, characterized in that: There is no gap between the outer arc surface of the metal filter cartridge (20) and the inner arc connection surface of the horizontal smoke guide tube (16), there is no gap between the inner surface of the lateral loading and unloading hole (13) and the outer connection surface of the external sealing cover plate (22), the inner diameter of the lateral loading and unloading hole (13) gradually decreases from the outside to the inside, and the outer diameter of the external sealing cover plate (22) gradually decreases from the outside to the inside.

3. The catalytic furnace with a built-in easy-to-maintain heat exchanger according to claim 1, characterized in that: The outer side surface of the internal thread sealing assembly cylinder (14) is provided with a regular hexagonal external control groove (27) for convenient rotation control.

4. The catalytic furnace with a built-in easy-to-maintain heat exchanger according to claim 1, characterized in that: The lower surface of the first heat exchange plate body (18) has downwardly protruding integral bottom support feet (28) on both sides, and the bottom support feet (28) are fixedly mounted on the inner bottom surface of the heat exchange chamber (9) by longitudinal bolts.

5. The catalytic furnace with a built-in easy-to-maintain heat exchanger according to claim 1, characterized in that: The temperature sensor (5) is fixedly mounted on the outer side of the internal connecting rod (23); an external assembly groove for mounting an external instrument (6) is provided on the outer side of the internal threaded sealing assembly cylinder (14); the external instrument (6) is inserted into the external assembly groove and fixedly connected to the outer side of the internal threaded sealing assembly cylinder (14); the output end of the temperature sensor (5) is electrically connected to the receiving end of the external instrument (6) via an internal signal transmission line of the internal connecting rod (23) and the internal linkage rod (15).

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