A mechanism for prolonging the life of a heating rod and a waste gas reaction device

Abstract

The utility model relates to process waste gas treatment technical field, concretely relates to a mechanism and waste gas reaction unit for prolonging the life of heating rod, include: bushing, its inside hollow and upper and lower both ends open, to make heating rod can be inserted from one end opening into bushing, the minimum inside diameter of bushing is greater than the maximum outside diameter of heating rod, to form the annular partition of axial extension between the inside wall of bushing and the outside wall of heating rod, to accommodate the electric heating element for heating heating rod. The utility model adds bushing outside heating rod, forms an annular partition of axial extension between both, to accommodate electric heating element, and through the upper sealing structure and lower sealing structure of upper and lower both ends, the annular partition is sealed completely, constructs a dry airtight heating chamber, separates electric heating element and process waste gas physically, fundamentally eliminates the risk of electrochemical corrosion, prolongs the service life of heating rod.

Description

Technical Field

[0001] This utility model relates to the field of process waste gas treatment technology, and in particular to a mechanism and waste gas reaction device for extending the life of heating rods. Background Technology

[0002] In the production processes of industries such as photovoltaics and semiconductors, large quantities of special gases are used. These processes generate toxic, corrosive, or polluting process waste gases, which must undergo efficient treatment to meet emission standards, as shown in the attached document. Figure 1 and attached Figure 2 As shown, the commonly used treatment method is to pass the waste gas into a reaction device with built-in heating rods. After the equipment is started and the temperature of the heating rods reaches the set value, the process waste gas enters from the inlet of the device and flows directly through the hollow channel inside the heating rods. In the high-temperature environment, it undergoes decomposition or oxidation reaction, thereby achieving harmless transformation. The high-temperature gas after the reaction is usually cooled down by the water tank or spray tower below, and finally connected to the plant exhaust system for centralized discharge.

[0003] However, the above-mentioned traditional structure has significant defects, the core problem of which is insufficient sealing: due to the assembly gaps between the heating rod and the installation port, as well as in its own structure, some unreacted process waste gas can easily leak from these gaps during the process, thus bypassing to the outside of the heating rod. The heating element (metal heating wire) wrapped around its outer wall is directly exposed to the leaked corrosive atmosphere, and the two will undergo a violent chemical reaction, causing the heating wire to be rapidly corroded and pulverized, ultimately causing electrical short circuit or open circuit failure.

[0004] Frequent damage to this type of heating wire significantly shortens the lifespan of the heating rod and even the entire processing device. This not only significantly increases the frequency of equipment maintenance and the cost of spare parts replacement, but may also affect the continuous and stable operation of the production line due to unexpected shutdowns. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide a mechanism for extending the life of a heating rod and a waste gas reaction device to solve the above problems.

[0006] A mechanism for extending the life of a heating rod includes: A sleeve, which is hollow inside and open at both ends, allows a heating rod to be inserted into the sleeve from one of the openings. The minimum inner diameter of the sleeve is greater than the maximum outer diameter of the heating rod, thereby forming an axially extending annular partition between the inner wall of the sleeve and the outer wall of the heating rod to accommodate an electric heating element for heating the heating rod. The upper sealing structure and the lower sealing structure are respectively located at the upstream and downstream inlets of the annular partition to form a sealed space, thereby preventing gas from entering the sealed space and contacting the heating element and reacting with it chemically.

[0007] As a preferred embodiment of this utility model, the upper sealing structure includes: An additional flange is added, which is fixedly installed at the upper end of the heating rod, and the maximum outer diameter of the additional flange is greater than the maximum outer diameter of the opening at the upper end of the sleeve; The first gasket is disposed in the gap between the additional flange and the upper opening of the sleeve.

[0008] As a preferred technical solution of this utility model, the lower sealing structure includes a sealing base, which includes a base plate and a side wall extending upward from the outer edge of the base plate. The base plate has a through hole in the middle for connecting the gas channel of the heating rod. The thickness of the side wall is less than or equal to the width of the annular partition at the lower opening, so that the side wall of the sealing base can be embedded in the lower inlet of the annular partition.

[0009] As a preferred embodiment of this utility model, the maximum outer diameter of the base plate of the sealing base is greater than the maximum outer diameter of its side wall, and the diameter of the through hole is smaller than the inner diameter of the gas channel of the heating rod, so that when the sealing base is installed in place, its base plate can simultaneously fit with the bottom end of the heating rod and the bottom end of the sleeve.

[0010] As a preferred embodiment of this utility model, the lower sealing structure further includes a second gasket, which is disposed in the gap between the bottom plate of the sealing base and the bottom end of the heating rod and the sleeve.

[0011] As a preferred embodiment of this utility model, the lower sealing structure further includes an inner liner that is hollow inside and runs through the top and bottom. One end of the liner is inserted into the through hole of the sealing base, and the other end extends into the gas channel of the heating rod to isolate water vapor.

[0012] To better address the aforementioned technical problems, this utility model also provides a waste gas reaction device, comprising: The housing is provided with an air inlet and an air outlet; At least one heating rod is disposed in the housing, and the two ends of the gas passage of the heating rod are respectively connected to the air inlet and the air outlet; The mechanism for extending the life of the heating rod as described in any of the above items is sleeved on the outside of the heating rod; An electric heating element is wound in an annular spacer between the sleeve and the heating rod; A spray system comprising a circulating water spray head disposed within the housing and located downstream of the gas passage of the heating rod.

[0013] As a preferred embodiment of this utility model, the device further includes an isolation barrel disposed in the housing to divide the internal chamber of the housing into a drying chamber and a humidifying chamber. The heating rod, heating element, and sleeve are all disposed in the drying chamber. The upper end of the isolation barrel forms an insertion port for inserting the heating rod and sleeve. The inner diameter of the insertion port is greater than or equal to the outer diameter of the sleeve. The lower end of the isolation barrel forms a transition hole connecting the downstream of the airflow channel of the heating rod and the air outlet. The inner diameter of the transition hole is greater than or equal to the side wall radius of the sealing base, so that the side wall of the sealing base can be inserted into the transition hole and seal the downstream inlet of the annular partition.

[0014] As a preferred embodiment of this utility model, the device further includes: The end plate has a first mounting groove at its upper end to accommodate the addition of a flange and a first gasket. An air intake flange is provided at the air intake port at the upper end of the housing, and the lower end of the air intake flange is fitted to the upper end of the additional flange. The connector is used to apply axial preload to the intake flange to drive the intake flange to press against the additional flange, thereby causing the first gasket to deform under pressure to seal the mating surface between the additional flange and the first mounting groove.

[0015] As a preferred embodiment of this utility model, the inner wall of the shell is provided with an annular cavity surrounding its interior. The annular cavity is connected to an inlet pipe and an outlet pipe. The circulating cooling medium can flow into the annular cavity through the inlet pipe and be discharged through the outlet pipe, so as to remove the heat from the outer surface of the shell through the flowing cooling medium.

[0016] The beneficial effects of this utility model are as follows: By adding a sleeve to the heating rod, an axially extending annular partition is formed between the two to accommodate the heating element; and the annular partition is completely sealed by the upper and lower sealing structures at both ends, creating a dry and sealed heating chamber. Because this design physically isolates the heating element from the process waste gas, it fundamentally eliminates the risk of electrochemical corrosion, thus greatly extending the service life of the heating rod and significantly improving the operational reliability and stability of the equipment. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1This is a schematic diagram of the external three-dimensional structure of an existing waste gas reaction device. Figure 2 This is a schematic diagram of a partial cross-section of an existing waste gas reaction device. Figure 3 This is a schematic diagram of a half-section of the present invention; Figure 4 This is a schematic diagram of the semi-sectional three-dimensional structure of this utility model; Figure 5 For the present utility model Figure 4 Enlarged structural diagram at point A in the middle; Figure 6 For the present utility model Figure 4 Enlarged structural diagram at point B.

[0019] The components in the diagram are labeled as follows: 1. Shell; 2. Inlet flange; 3. Circulating water curtain; 4. Heating rod; 5. Heating element; 6. Isolation tank; 7. Circulating water spray head; 8. Sealing base; 9. Additional flange; 10. Fourth gasket; 11. First gasket; 12. Sleeve; 13. Second gasket; 14. Liner; 15. Third gasket; 16. Lower end plate; 17. Upper end plate; 18. Locking element. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.

[0021] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0022] like Figure 3 and Figure 4As shown, a mechanism for extending the life of a heating rod includes: a sleeve 12, which is hollow inside and open at both ends, so that the heating rod 4 can be inserted into the sleeve 12 from one of the openings. The minimum inner diameter of the sleeve 12 is greater than the maximum outer diameter of the heating rod 4, thereby forming an axially extending annular partition between the inner wall of the sleeve 12 and the outer wall of the heating rod 4 to accommodate the heating element 5 for heating the heating rod 4; an upper sealing structure and a lower sealing structure are respectively disposed at the upper and lower inlets of the annular partition to form a sealed space in the annular partition, so as to prevent gas from entering the sealed space and contacting the heating element 5 and reacting with it chemically. The above technical solution can solve the problem of process waste gas leaking into the area where the heating element 5 is located due to poor sealing, causing chemical reaction and corrosion, and circuit breakage. Specifically, its working principle is to install an independent sleeve 12 outside the original heating rod 4, thereby constructing an annular partition that is completely isolated from the process waste gas channel. During operation, the heating element 5 is first wrapped around the sleeve 12 or placed in the annular partition, and then the heating rod 4 is inserted into the sleeve 12. The annular partition is completely sealed by the upper and lower sealing structures at both ends, forming a dry, clean, and sealed heating chamber. This physically isolates the heating element 5 from the corrosive atmosphere, fundamentally eliminating the corrosion risk of the heating element 5, thereby significantly extending the service life of the heating rod 4 and improving the operational reliability and stability of the equipment.

[0023] Furthermore, in this embodiment, the sleeve 12 is made of ceramic material; The above technical solution can improve the safety level of the equipment. Specifically, its working principle is to utilize the excellent insulation, high temperature resistance and chemical stability of ceramic materials. During operation, a hollow ceramic tube is directly used as the sleeve 12. The heating wire is wound in the annular spacer formed by the sleeve 12 and the heating rod 4, which ensures the electrical insulation between the heating circuit and the ground, and greatly improves the safety level of the equipment. At the same time, the high temperature resistance and corrosion resistance of ceramic materials further ensure the long service life and reliability of the sleeve 12 itself.

[0024] like Figure 3 , Figure 4 and Figure 5 As shown, in this embodiment, the upper sealing structure includes: an additional flange 9, which is fixedly disposed at the upper end of the heating rod 4, and the maximum outer diameter of the additional flange 9 is greater than the maximum outer diameter at the upper opening of the sleeve 12; and a first gasket 11, which is disposed in the gap between the additional flange 9 and the upper opening of the sleeve 12. The above technical solution can solve the sealing problem of the upper opening of the annular partition. Specifically, the upper sealing structure of this solution achieves sealing by adding a flange 9 and a first gasket 11. The working principle is to use the added flange 9 as a pressure plate to cover the upper opening of the sleeve 12. During operation, the first gasket 11 is placed in the gap between the added flange 9 and the upper end face of the sleeve 12. When the added flange 9 is subjected to downward axial pressure, it will squeeze the first gasket 11 and cause it to undergo elastic deformation. The deformation of the first gasket 11 can fully fill all the micro gaps, achieving a reliable static seal at the upper end. The structure is simple and easy to install and disassemble.

[0025] Furthermore, in this embodiment, a longitudinally connected wire groove is provided between the flange 9 and the air intake flange 2, so that the two wire ends of the heating element 5 pass through the wire groove in sequence and extend to the outside of the housing 1, thereby electrically connecting with the external power supply, and powering the heating element 5 without reducing the sealing performance. The above technical solution solves the problem of needing to extend the heating element's power supply wires out of the sealed cavity while ensuring reliable sealing. Specifically, its working principle involves machining longitudinal wire passage grooves on the added flange 9 and the air inlet flange 2, forming a lead-in channel. During operation, the two wires of the heating element 5 are led upwards from the annular partition, passing sequentially through the wire passage grooves of the added flange 9 and the air inlet flange 2, and finally connected to the external power supply of the housing 1. This achieves a sealed lead-out of the power supply line, avoiding the need to create separate holes in the housing 1 or the sleeve 12 that would compromise the overall seal, simplifying the structure, ensuring operational safety, and making installation and maintenance more convenient.

[0026] Furthermore, in this embodiment, a protective sleeve is also provided on the outside of the wiring end (i.e., the power supply wire) of the heating element 5. The protective sleeve is made of ceramic material and is used to isolate the wire from the surrounding metal parts. The above technical solution provides safety protection for the power supply line of the heating element 5. Specifically, its working principle utilizes the high insulation, high heat resistance, and high mechanical strength of ceramic materials to provide a solid physical barrier for the exposed metal wires. During operation, the ceramic protective sleeve is pre-installed on the outside of the power supply wires, passing through the cable tray between the added flange 9 and the air inlet flange 2 along with the power supply wires. This prevents the insulation layer of the power supply wires from aging and melting under high-temperature environments, or from the exposed insulation being worn due to mechanical vibration or improper installation, which could lead to a short circuit between the live metal wires and the metal flange or housing 1, thus enhancing the electrical safety of the equipment.

[0027] like Figure 3 , Figure 4 and Figure 6As shown, in this embodiment, the lower sealing structure includes a sealing base 8, which includes a base plate and a side wall extending upward from the outer edge of the base plate. A through hole for connecting the gas channel of the heating rod 4 is opened in the middle of the base plate. The thickness of the side wall is less than or equal to the width of the annular partition at the lower opening, so that the side wall of the sealing base 8 can be embedded in the lower inlet of the annular partition. The above technical solution can solve the contradiction between sealing the lower end of the annular partition and ensuring airflow. Specifically, its working principle is to use its side wall to embed into the lower end of the annular partition between the sleeve 12 and the heating rod 4, thereby blocking the annular channel there. During operation, the sealing base 8 is pushed in from below, so that its side wall is tightly inserted into the lower end inlet of the annular partition. The through hole in the middle of the base plate ensures the unobstructed gas passage inside the heating rod 4. Through the plug-in structure, the lower end is effectively sealed, while ensuring that the normal flow path of the process waste gas is not affected.

[0028] like Figure 4 and Figure 6 As shown, in this embodiment, the maximum outer diameter of the bottom plate of the sealing base 8 is greater than the maximum outer diameter of its side wall, and the diameter of the through hole is smaller than the inner diameter of the gas channel of the heating rod 4, so that when the sealing base 8 is installed in place, its bottom plate can simultaneously fit with the bottom end of the heating rod 4 and the bottom end of the sleeve 12. The above technical solution can solve the problems of unstable positioning and small sealing surface of the sealing base 8 after installation. Specifically, the working principle is to use its large-diameter base plate as a cover and positioning part. During operation, when the side wall of the sealing base 8 is embedded in place, its base plate will be tightly fitted with the bottom end of the heating rod 4 and the bottom end of the sleeve 12 at the same time. The diameter of the through hole is smaller than the inner diameter of the heating rod 4 channel, which ensures that the base plate has sufficient structural strength to support and seal, increases the sealing contact area, improves the sealing reliability, and makes the installation position of the sealing base 8 more stable and less prone to displacement. The sealing base 8 can be installed by a detachable method such as threaded connection or bolt fixing, which can facilitate disassembly and maintenance. Those skilled in the art can flexibly choose according to actual needs.

[0029] like Figure 3 , Figure 4 and Figure 6 As shown, in this embodiment, the lower sealing structure also includes a second gasket 13, which is disposed in the gap between the bottom plate of the sealing base 8 and the bottom ends of the heating rod 4 and the sleeve 12. The above technical solution can solve the problem of sealing failure caused by insufficient processing precision when relying solely on hard metal contact. In particular, when the contact surface is uneven, water vapor generated by high temperature can seep in through the gap. Its working principle is to use soft gasket material to compensate for the flatness error and micro-unevenness that may exist in the machining. During operation, the second gasket 13 is placed on the base plate. As the sealing base 8 is installed in place, the second gasket 13 is pressed between the three parts. Through the elastic deformation of the second gasket 13, a better sealing effect is achieved, which significantly improves the tolerance and reliability of the sealing structure.

[0030] like Figure 3 , Figure 4 and Figure 6 As shown, in this embodiment, the lower sealing structure also includes an inner liner 14 that is hollow inside and runs through the top and bottom. One end of the liner is inserted into the through hole of the sealing base 8, and the other end extends into the gas channel of the heating rod 4 to isolate water vapor. The above technical solution can solve the problem of water vapor or condensate generated by downstream spraying flowing back or spreading and contacting the inner wall of the high-temperature heating rod 4, causing corrosion or damage. Its working principle is that the inner liner 14 acts as a guide pipe and isolation sleeve, separating the moisture that may exist downstream from the metal inner wall of the heating rod 4. During operation, one end of the inner liner 14 is tightly installed in the through hole of the sealing base 8, and the other end extends into the pipe of the heating rod 4 for a certain distance. The process waste gas passes through the inside of the inner liner 14, further protecting the heating rod 4 itself, extending the life of its core components, and achieving dual protection, namely protecting the heating element 5 and protecting the heating rod 4.

[0031] like Figure 1 , Figure 3 As shown, in order to better solve the above-mentioned technical problems, this utility model also provides a waste gas reaction device, including: a shell 1, which is provided with an air inlet and an air outlet; at least one heating rod 4 disposed in the shell 1, the two ends of the gas channel of the heating rod 4 being connected to the air inlet and the air outlet respectively; a mechanism for extending the life of the heating rod as described above, which is sleeved on the outside of the heating rod 4; an electric heating element 5, which is wound in the annular partition between the sleeve 12 and the heating rod 4; and a spray system, which includes a circulating water spray head 7 disposed in the shell 1 and located downstream of the gas channel of the heating rod 4. The above technical solution can solve the problem of frequent damage to the heating rod assembly due to corrosion of the heating wire in traditional waste gas treatment devices, which requires shutdown for maintenance. Specifically, its working principle is as follows: the process waste gas enters the shell 1 through the air inlet, flows through the heating rod 4 heated by the heating element 5 in the sealed annular partition, and undergoes thermal reaction or decomposition. The treated gas then enters the downstream, is further purified by the washing liquid sprayed by the circulating water spray head 7, and is discharged. During operation, the correct installation of the upper and lower sealing structures is ensured, so that the heating element 5 is in an absolutely dry environment, which greatly improves the continuous operation time and maintenance cycle of the entire waste gas treatment device, reduces operating costs, and ensures treatment efficiency.

[0032] like Figure 3 and Figure 4 As shown, in this embodiment, the device also includes an isolation barrel 6, which is disposed in the housing 1 to divide the internal chamber of the housing 1 into a dry chamber and a wet chamber. The heating rod 4, the electric heating element 5 and the sleeve 12 are all disposed in the dry chamber. The upper end of the isolation barrel 6 forms an insertion port for the heating rod 4 and the sleeve 12 to be inserted. The inner diameter of the insertion port is greater than or equal to the outer diameter of the sleeve 12. The lower end of the isolation barrel 6 forms a transition hole that connects the downstream of the airflow channel of the heating rod 4 and the air outlet. The inner diameter of the transition hole is greater than or equal to the side wall radius of the sealing base 8, so that the side wall of the sealing base 8 can be inserted into the transition hole and seal the downstream inlet of the annular partition. The above technical solution can solve the risk of water vapor rising from the lower humid chamber and eroding the heating element 5 in the drying chamber. Its working principle is to use the physical separation of the isolation barrel 6 to create a dry area for installing the heating system and a humid area for spray washing inside the shell 1. During operation, the heating rod 4 assembly with the sleeve 12 is inserted into the isolation barrel 6 from top to bottom. The side wall of the sealing base 8 at its lower end is also inserted into the transition hole at the lower end of the isolation barrel 6 at the same time, forming a double seal. Through physical partitioning and insertion sealing, the sealing performance of the drying chamber is enhanced, further ensuring the safety of the working environment of the heating element 5.

[0033] like Figure 1 and Figure 3 As shown, in this embodiment, the device further includes: an end plate with a first mounting groove at its upper end to accommodate the additional flange 9 and the first gasket 11; an air inlet flange 2, which is disposed at the air inlet at the upper end of the housing 1, with the lower end of the air inlet flange 2 fitting against the upper end of the additional flange 9; and a connector for applying axial preload to the air inlet flange 2 to drive the air inlet flange 2 to press against the additional flange 9, thereby causing the first gasket 11 to deform under pressure to seal the mating surface between the additional flange 9 and the first mounting groove. The above technical solution can solve the problem of the upper sealing structure requiring reliable clamping force. Specifically, its working principle is to use the air inlet flange 2 as the source of clamping force. During operation, the air inlet flange 2 is tightened by bolts and other connecting parts, causing it to move downwards, thereby pressing the additional flange 9 against the first mounting groove of the end plate, and fully compressing the first gasket 11 between them to achieve a seal. It cleverly uses the existing structure as the force-applying component, eliminating the need for additional fastening devices. The structure is compact, and the sealing force is adjustable and reliable.

[0034] like Figure 3 and Figure 4 As shown, in this embodiment, the inner wall of the housing 1 is provided with an annular cavity surrounding its interior. The annular cavity is connected to an inlet pipe and an outlet pipe. The circulating cooling medium can flow into the annular cavity through the inlet pipe and be discharged through the outlet pipe, so as to remove the heat from the outer surface of the housing 1 through the flowing cooling medium. The above technical solution can solve the safety hazard of excessively high surface temperature of the shell 1 during operation of the reaction device, which may cause burns to operators. Specifically, its working principle is to integrate a sealed annular chamber inside the shell 1 to form a water cooling system. During operation, an external circulation pump pumps cooling water or other cooling media into the annular chamber through the inlet pipe. The water fills the chamber and absorbs a large amount of heat generated by the internal electric heating element 5 and conducted to the shell 1. The heated water is discharged through the outlet pipe, completing a continuous cooling cycle. Through active water cooling, the internal heat is efficiently and evenly removed, significantly reducing the surface operating temperature of the equipment and improving the safety and reliability of the equipment.

[0035] like Figure 3 , Figure 4 and Figure 5 As shown, in this embodiment, the end plate is also provided with a second mounting groove, which is used to fit the upper flange of the isolation barrel 6. A third gasket 15 is provided at the contact point between the upper flange of the isolation barrel 6 and the second mounting groove to prevent water vapor generated by the heating element 5 from passing through the circulating water curtain 3. The above technical solution solves the sealing problem between the drying chamber and the upper air intake area. Specifically, its working principle involves setting a second mounting groove on the end plate to position and install the upper flange of the isolation barrel 6, and adding a third gasket 15 between them. During operation, the axial clamping force of the heating rod 4 and the sleeve 12 deforms the third gasket 15 to seal, preventing water vapor generated by the circulating water curtain 3 from leaking from the upper edge of the isolation barrel 6 into the drying chamber. This improves the sealing system of the entire drying chamber, achieves all-round sealing protection, and ensures the absolute dryness of the heating element 5.

[0036] like Figure 4 and Figure 5As shown, in this embodiment, a fourth gasket 10 is provided between the mating surfaces of the intake flange 2 and the additional flange 9, so that when an axial preload is applied to the intake flange 2 through the connector, the first gasket 11, the third gasket 15 and the fourth gasket 10 can be squeezed simultaneously. The above technical solution can solve the problem of multiple sealing points needing to be tightened separately, which is cumbersome and may result in uneven pre-tightening force. Specifically, its working principle is to use a concentrated axial pre-tightening force, i.e., tightening the connecting parts of the air inlet flange 2. The force transmission path passes through the fourth gasket 10, the additional flange 9, the first gasket 11, and the third gasket 15 in sequence, achieving "tightening all at once". All key sealing points are compacted simultaneously, which greatly simplifies assembly and maintenance operations, ensures the synergy and consistency of the sealing effect, and is an ingenious mechanical design.

[0037] like Figure 1 , Figure 3 and Figure 4 As shown, in this embodiment, the end plate includes a lower end plate 16 fixedly connected to the upper end of the housing 1, and an upper end plate 17 disposed on the lower end plate 16. The upper end plate 17 and the lower end plate 16 are fixedly connected by a locking member 18. All air intake flanges 2 are installed on the upper end plate 17. The above technical solution can solve the problem of time-consuming and labor-intensive disassembly of individual heating rods 4 during the maintenance of large reaction devices. Specifically, its working principle is that the upper end plate 17 is a detachable pressure plate, which is fixed to the lower end plate 16 by locking parts 18 such as bolts. All air inlet flanges 2 and related sealing components are installed on the upper end plate 17. During operation and maintenance, simply loosen the locking parts 18 to lift the entire upper end plate 17 together with all heating rod 4 components out of the housing 1. This realizes the modular quick disassembly function, greatly shortens the downtime for maintenance, and improves the maintainability of the equipment. It is especially suitable for large industrial equipment with multiple heating rods 4.

[0038] Furthermore, the gasket can be made of EPDM material; This solution optimizes the material of gaskets, a key component in all the aforementioned sealing structures. Its working principle utilizes the excellent heat resistance, superior water vapor resistance, aging resistance, and good chemical stability of EPDM (ethylene propylene diene monomer) rubber. Even under high-temperature conditions, EPDM gaskets can maintain their elasticity and sealing performance for a long time without failing due to high-temperature hardening or embrittlement. This greatly improves the long-term reliability and durability of all sealing points, ensuring that the sealing life of the drying chamber matches the overhaul cycle of the equipment. It is a key detail guarantee for achieving long-life and maintenance-free operation of the entire device.

[0039] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0040] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A mechanism for extending the life of a heating rod, characterized in that, include: A sleeve (12) is hollow inside and open at both ends so that a heating rod (4) can be inserted into the sleeve (12) from one of the openings. The minimum inner diameter of the sleeve (12) is greater than the maximum outer diameter of the heating rod (4), thereby forming an axially extending annular partition between the inner wall of the sleeve (12) and the outer wall of the heating rod (4) to accommodate the heating element (5) for heating the heating rod (4). The upper sealing structure and the lower sealing structure are respectively set at the upper and lower inlets of the annular partition to form a sealed space in the annular partition, so as to prevent gas from entering the sealed space and contacting the heating element (5) and reacting with it chemically.

2. The mechanism for extending the life of a heating rod according to claim 1, characterized in that, The upper sealing structure includes: An additional flange (9) is added, which is fixedly installed at the upper end of the heating rod (4). The maximum outer diameter of the additional flange (9) is greater than the maximum outer diameter at the upper opening of the sleeve (12). The first gasket (11) is disposed in the gap between the additional flange (9) and the upper opening of the sleeve (12).

3. The mechanism for extending the life of a heating rod according to claim 1, characterized in that, The lower sealing structure includes a sealing base (8), which includes a base plate and a side wall extending upward from the outer edge of the base plate. The base plate has a through hole in the middle for connecting the gas channel of the heating rod (4). The thickness of the side wall is less than or equal to the width of the annular partition at the lower opening, so that the side wall of the sealing base (8) can be embedded in the lower inlet of the annular partition.

4. The mechanism for extending the life of a heating rod according to claim 3, characterized in that, The maximum outer diameter of the base plate of the sealing base (8) is greater than the maximum outer diameter of its side wall, and the diameter of the through hole is smaller than the inner diameter of the gas channel of the heating rod (4), so that when the sealing base (8) is installed in place, its base plate can simultaneously fit with the bottom end of the heating rod (4) and the bottom end of the sleeve (12).

5. The mechanism for extending the life of a heating rod according to claim 4, characterized in that, The lower sealing structure also includes a second gasket (13), which is disposed in the gap between the bottom plate of the sealing base (8) and the bottom end of the heating rod (4) and the sleeve (12).

6. The mechanism for extending the life of a heating rod according to claim 5, characterized in that, The lower sealing structure also includes an inner liner (14) that is hollow inside and runs through the top and bottom. One end of the liner is inserted into the through hole of the sealing base (8), and the other end extends into the gas channel of the heating rod (4) to isolate water vapor.

7. A waste gas reaction device, characterized in that, include: The housing (1) is provided with an air inlet and an air outlet; At least one heating rod (4) is provided in the housing (1), and the two ends of the gas passage of the heating rod (4) are respectively connected to the air inlet and the air outlet; The mechanism for extending the life of the heating rod as described in any one of claims 1-6 is sleeved on the outside of the heating rod (4); The heating element (5) is wound in the annular spacer between the sleeve (12) and the heating rod (4); The spray system includes a circulating water spray head (7) disposed in the housing (1) and located downstream of the gas passage of the heating rod (4).

8. The waste gas reaction device according to claim 7, characterized in that, The device also includes an isolation barrel (6), which is disposed in the housing (1) to divide the internal chamber of the housing (1) into a dry chamber and a humidified chamber. The heating rod (4), the electric heating element (5) and the sleeve (12) are all disposed in the dry chamber. The upper end of the isolation barrel (6) forms an insertion port for inserting the heating rod (4) and the sleeve (12). The inner diameter of the insertion port is greater than or equal to the outer diameter of the sleeve (12). The lower end of the isolation barrel (6) forms a transition hole connecting the downstream of the airflow channel of the heating rod (4) and the air outlet. The inner diameter of the transition hole is greater than or equal to the side wall radius of the sealing base (8) so that the side wall of the sealing base (8) can be inserted into the transition hole and seal the downstream inlet of the annular partition.

9. The waste gas reaction device according to claim 8, characterized in that, The device further includes: The end plate has a first mounting groove at its upper end to accommodate the addition of a flange (9) and a first gasket (11). An air inlet flange (2) is provided at the air inlet at the upper end of the housing (1), and the lower end of the air inlet flange (2) is in contact with the upper end of the additional flange (9); The connector is used to apply axial preload to the intake flange (2) to drive the intake flange (2) to press the additional flange (9), thereby causing the first gasket (11) to be deformed under pressure to seal the mating surface between the additional flange (9) and the first mounting groove.

10. The waste gas reaction device according to claim 9, characterized in that, The inner wall of the housing (1) is provided with an annular chamber surrounding its interior. The annular chamber is connected to an inlet pipe and an outlet pipe. The circulating cooling medium can flow into the annular chamber through the inlet pipe and be discharged through the outlet pipe, so as to remove the heat from the outer surface of the housing (1) through the flowing cooling medium.

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