Closed high temperature dust collector

Abstract

The application discloses a closed high-temperature dust remover, which comprises a dust removal box, a flower plate, a flower plate hole, a dust removal assembly hung on the flower plate, a venturi assembly hung and installed on the flower plate hole, a flange assembly arranged at the bottom surface of the flower plate hole, a sealing strip, a bag cage frame fixed on the outer surface of the venturi assembly through a hoop and a cloth bag covered on the bag cage and clamped by the flange assembly. The traditional venturi short pipe fixing assembly is replaced by the flange assembly, the hoop is used to embrace and fix the bag cage frame on the outer surface of the venturi, the end of the cloth bag is clamped between the flange assemblies, the cloth bag is tightly attached to the bag cage, the upper flange plate is welded on the bottom of the flower plate to form a fixed support base, and the lower flange plate is fastened through bolts to form a detachable clamping layer, so that the cloth bag gravity and the airflow impact force are shared by the two flange plates, and stress concentration on a single connecting point is avoided.

Description

Technical Field

[0001] This utility model relates to the technical field of baghouse dust collectors, and in particular to a closed high-temperature dust collector. Background Technology

[0002] Baghouse dust collectors are highly efficient and environmentally friendly equipment widely used in industrial dust control. Their core principle is to filter dust-laden gas through filter bags, causing dust particles to adhere to the surface of the filter bags. The purified gas is then discharged into the atmosphere. When the dust on the surface of the filter bags reaches a certain thickness, it is cleaned by pulse jet cleaning or mechanical vibration, achieving the cyclic collection of dust and regeneration of the filter bags. This equipment features high dust removal efficiency (up to 99% or more), strong adaptability, and stable operation, and is particularly adept at handling fine particulate matter.

[0003] The installation of suspended venturi dust collector bags must be carried out according to the standard procedure: First, loosen and remove the bottom short tube assembly of the suspended venturi tube. After connecting and securing it to the top of the dust collector frame through the standard threaded interface, vertically insert the frame into the special dust collector bag with the pre-set fixing rope. Use the cross-tying method to firmly tie the stretched bag opening rope to the designated position of the short tube. Then, vertically align the assembled suspended venturi tube body with the hole in the tube sheet and use the matching bolts to fix it circumferentially to the specified torque value. Finally, coaxially connect the pre-tied bag frame assembly with the fixed venturi tube, and rotate the short tube to the limit mark to complete the overall sealing connection. The entire process requires strict control of the bag's unfolded state and the sealing performance of each interface.

[0004] However, in actual use, the dust collector bag becomes heavier and heavier as dust accumulates. With the long-term impact of airflow, the dust collector bag will shake frequently. At this time, the rigid connection between the side wall of the short pipe and the inner wall of the tube sheet hole will cause the short pipe connected to the tube sheet to wear out. At the same time, it will continuously squeeze the bag, causing the bag to break and eventually lose its function. Utility Model Content

[0005] The purpose of this invention is to solve the problem in the prior art where the rigid connection between the side wall of the short tube and the inner wall of the perforated plate leads to wear of the short tube connected to the perforated plate, and at the same time, continuous compression of the cloth bag causes the cloth bag to break and eventually lose its function.

[0006] To achieve the above objectives, this application proposes a closed high-temperature dust collector, comprising: Dust collection box; A perforated plate is disposed in the inner cavity of the dust collector, and the perforated plate has an array of perforated plate holes; A dust collection assembly suspended from the tube sheet, the dust collection assembly comprising: a venturi assembly suspended and installed on the tube sheet hole; a flange assembly disposed on the bottom surface of the tube sheet hole, the flange assembly comprising: an upper flange welded to the bottom of the tube sheet and surrounding the tube sheet hole, a lower flange fastened to the upper flange assembly by bolts; a sealing strip disposed between the upper flange and the lower flange; a bag cage frame fixed to the outer surface of the venturi assembly by clamps; and a cloth bag covering the bag cage and clamped by the flange assembly.

[0007] The closed high-temperature dust collector of this application replaces the traditional venturi tube short tube fixing assembly with a flange assembly. The clamps secure the bag cage frame to the outer surface of the venturi tube, and the ends of the filter bags are held between the flange assemblies, ensuring the filter bags are tightly attached to the bag cage. Simultaneously, the upper flange is welded to the bottom of the tube sheet to form a fixed support base; the lower flange is fastened with bolts, forming a detachable clamping layer. Both components share the weight of the filter bags and the impact force of the airflow, avoiding stress concentration at a single connection point. This solves the problem in the prior art where the rigid connection between the side wall of the short tube and the inner wall of the tube sheet hole leads to wear on the short tube connected to the tube sheet, and continuous compression of the filter bags, causing them to break and ultimately lose their function.

[0008] Furthermore, in order to provide a flange with a diameter larger than that of the perforated plate to form a mechanical jamming and suppress the horizontal swaying of the venturi tube, the end of the venturi tube assembly is provided with a flange to suspend the venturi tube assembly on the perforated plate.

[0009] Furthermore, to facilitate the installation of the cage frame, the ends of the cage frame are hinged with contact adapter plates.

[0010] Furthermore, in order to better secure the bag cage frame with bolts, through holes are provided on the contact adapter plate, and bolt holes corresponding to the bolt holes are distributed in an array around the outer wall of the venturi assembly.

[0011] Furthermore, in order to install the flange assembly on the tube sheet, the circumference of the tube sheet hole is provided with a tube sheet through hole corresponding to the flange assembly mounting hole.

[0012] Furthermore, to enhance the sealing performance of the flange, a circular sealing groove is provided on the lower flange, and the sealing strip is installed in the circular sealing groove.

[0013] Furthermore, to enhance the secure installation of the bag, the end of the bag is pressed between the circular sealing groove and the sealing strip.

[0014] The beneficial effects of this application are as follows: 1. The closed high-temperature dust collector of this application replaces the traditional Venturi tube short tube fixing assembly with a flange assembly. The clamps fix the bag cage frame to the outer surface of the Venturi tube, and the end of the filter bag is clamped between the flange assemblies, so that the filter bag is tightly attached to the bag cage. At the same time, the upper flange is welded to the bottom of the tube sheet to form a fixed support base; the lower flange is fastened with bolts to form a detachable clamping layer. The two together share the weight of the filter bag and the impact force of the airflow, avoiding stress concentration at a single connection point. This solves the problem in the prior art where the rigid connection between the side wall of the short tube and the inner wall of the tube sheet hole leads to wear of the short tube connected to the tube sheet, and at the same time, continuous compression of the filter bag causes the filter bag to break and eventually lose its function.

[0015] 2. The venturi tube of this application has a flange at the end protruding from the tube sheet. The diameter of the flange is larger than the diameter of the tube sheet hole, so that the venturi tube and the tube sheet hole are mechanically locked together. At the same time, the end of the flange is set as a plane, so that the bottom of the flange contacts the surface of the tube sheet, which enhances the stability of the venturi tube and reduces its shaking.

[0016] 3. The end of the bag cage frame of this application is hinged with a contact adapter plate. The clamping band fixes the bag cage frame to the outer surface of the venturi tube by pressing the contact adapter plate, replacing the traditional welding connection, eliminating metal fatigue cracks caused by high-frequency shaking, and uniformly distributing the clamping force: the annular clamping band applies a 360° uniform pressure to prevent local stress concentration in the bag cage and protect the integrity of the venturi tube wall.

[0017] 4. The sealing strip of this application fills the gap between the upper and lower flanges to compensate for the gap caused by high temperature thermal deformation and ensure airtightness. On the one hand, the bag opening is directly clamped and fixed by the flange assembly, that is, pressed by the sealing strip. The clamping force is evenly applied to the entire circumference of the bag, avoiding local strangulation or folding damage caused by traditional rope binding. On the other hand, it makes the bag and the venturi tube not physically bound. Even if the bag shakes, its kinetic energy is limited to below the flange clamping section and will not be transmitted to the connection between the venturi tube and the tube sheet. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a cross-sectional view of a sealed high-temperature dust collector according to an embodiment of this application; Figure 2 This is a partial schematic diagram of the installation of the dust removal component in an embodiment of this application; Figure 3 for Figure 2 Enlarged view of point a in the middle; Figure 4 This is a partial installation diagram of the clamp and contact adapter plate in an embodiment of this application; Figure 5 This is a schematic diagram of the clamp structure in an embodiment of this application.

[0020] Explanation of reference numerals in the attached figures: 1. Dust collection box; 2. Perforated plate; 21. Perforated plate hole; 22. Perforated plate through hole; 3. Dust removal assembly; 31. Venturi tube assembly; 311. Flange; 312. Bolt hole; 32. Flange assembly; 321. Upper flange; 322. Lower flange; 3221. Sealing groove; 323. Sealing strip; 324. Bag cage frame; 3241. Contact adapter plate; 32411. Through hole; 325. Clamp; 326. Filter bag. Detailed Implementation

[0021] The following will be combined with the appendix Figures 1-5 The embodiments of the technical solutions of this application are described in detail below. The following embodiments are only used to more clearly illustrate the technical solutions of this application, and are therefore merely examples and should not be used to limit the scope of protection of this application. Furthermore, the technical features involved in the various embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0022] like Figures 1-5 This illustration depicts a sealed high-temperature dust collector according to this application, comprising: a dust collection box 1; a tube sheet 2 disposed within the inner cavity of the dust collection box 1, the tube sheet 2 having an array of tube sheet holes 21; a dust collection assembly 3 suspended on the tube sheet 2, the dust collection assembly 3 comprising: a venturi tube assembly 31 suspended and installed on the tube sheet holes 21; a flange assembly 32 disposed on the bottom surface of the tube sheet holes 21, the flange assembly 32 comprising: an upper flange 321 welded to the bottom of the tube sheet 2 and surrounding the tube sheet holes 21, and a lower flange 322 fastened to the upper flange assembly 32 by bolts; a sealing strip 323 disposed between the upper flange 321 and the lower flange 322; a bag cage frame 324 fixed to the outer surface of the venturi tube assembly 31 by clamps 325; and a cloth bag 326 covering the bag cage frame 324 and clamped by the flange assembly 32.

[0023] Please refer to Figure 1 and Figure 2In the closed high-temperature dust collector of this application, the dust collection box 1 is a closed steel structure box, and a tube sheet 2 is horizontally arranged in its inner cavity. The tube sheet 2 is made of heat-resistant steel plate with a thickness of 8-10mm, and its surface has an array of tube sheet holes 21 to form a regular filter unit layout. The tube sheet 2 is fixed to the inner wall of the dust collection box by angle steel welded around its perimeter to ensure that the deformation is ≤1mm when subjected to pulse backflushing airflow in working condition. Dust collection components 3 are suspended at each tube sheet hole 21. The venturi component 31 uses the Venturi effect to achieve the dust removal effect while forming a structural connection and positioning for the other components. That is, the end of the bag cage frame 324 with a diameter of φ150mm overlaps with the outer surface of the venturi component 31, and the bag cage frame 324 overlaps with the outer surface of the venturi component 31 by two sets of clamps 325 arranged 180° symmetrically to achieve a tight connection. The clamps are made of 304 stainless steel strip.

[0024] Please refer to Figure 3 Furthermore, a flange assembly 32 is provided below each perforated plate hole 21. The flange assembly 32 includes: an upper flange 321 welded to the bottom of the perforated plate 2 and surrounding the perforated plate hole 21, which forms a positioning and realizes the connection between the flange assembly 32 and the perforated plate 2; a lower flange 322 fastened to the upper flange assembly 321 by bolts; and a sealing strip 323 set between the upper flange 321 and the lower flange 322. The lower flange 322 and the upper flange 321 form a mating sealing surface, and the sealing strip 323 is provided to increase the sealing performance of the flange assembly. The lower flange 322 has annularly distributed sealing grooves 3221, and the sealing strip 323 is installed in the sealing grooves 3221. The end of the bag 326 is pressed between the sealing grooves 3221 and the sealing strip 323. That is, the opening end of the bag is axially sealed by the pressing action of the lower flange 322 and the sealing strip 323, while also providing support for the bag cage frame 324.

[0025] To prevent the Venturi assembly 31 from swaying due to airflow, a flange 311 is provided at the end of the Venturi assembly 31. The diameter of the flange 311 is larger than the diameter of the perforation 2 in the tube sheet. The Venturi assembly 31 is suspended on the tube sheet 2. The bottom surface of the flange 311 is an annular plane, ensuring a tight fit between the bottom surface of the flange 311 and the top surface of the tube sheet 2. When the bag cage frame 324 sways, i.e., when the airflow impacts the Venturi assembly 31, the tight fit between the bottom surface of the flange 311 and the top surface of the tube sheet 2 creates an effective mechanical restraint. This restraint prevents the Venturi assembly 31 from swaying radially and axially under the influence of airflow. Furthermore, with prolonged dust removal, as more and more dust accumulates on the filter bag 326, the entire device becomes increasingly heavy, further enhancing the stability of the mechanical restraint structure of the flange 311.

[0026] Please refer to Figure 4 and Figure 5 To facilitate the hinged connection of the end of the cage frame 324 to the contact adapter plate 3241, the contact adapter plate 3241 is provided with a through hole 32411, the outer wall of the Venturi tube assembly 31 is surrounded by a bolt hole 312 corresponding to the through hole 32411, and the circumference of the tube plate hole 21 is provided with a tube plate through hole 22 corresponding to the mounting hole of the flange assembly 32.

[0027] The upper end of the cage frame 324 is hinged to a contact adapter plate 3241 via a pin. This adapter plate is made of 3mm thick 304 stainless steel sheet, stamped and formed, with a planar dimension of 80mm × 60mm. The hinge hole uses an H7 / g6 clearance fit to ensure ±5° of swing freedom. The contact adapter plate 3241 is hard chrome plated to resist long-term friction and wear. An 8mm through hole 32411 is provided on the contact adapter plate 3241, and corresponding M8 bolt holes 312 are provided on the outer wall of the venturi assembly 31. The hole spacing tolerance is controlled within ±0.1mm to ensure that bolts can be easily inserted during installation. Simultaneously, four 10.5mm tube sheet through holes 22 are evenly distributed around the circumference of the tube sheet hole 21, forming a concentric hole system with the four M10 mounting holes of the flange assembly 32. A special positioning fixture ensures that the parallelism between the tube sheet through holes 22 and the bolt holes 312 is ≤0.1mm.

[0028] In the description of the embodiments of this application, the technical terms "upper", "lower", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0029] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "set," "equipped with," "connected," and "installed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A sealed high-temperature dust collector, characterized in that, include: Dust collector (1); a perforated plate (2) is provided in the inner cavity of the dust collector (1), and the perforated plate (2) has an array of perforated plate holes (21); A dust removal assembly (3) suspended on the tube sheet (2) includes: a venturi assembly (31) suspended on the tube sheet hole (21); a flange assembly (32) disposed on the bottom surface of the tube sheet hole (21), the flange assembly (32) including: an upper flange (321) welded to the bottom of the tube sheet (2) and surrounding the tube sheet hole (21), and a lower flange (322) fastened to the flange assembly (32); a bag cage frame (324) fixed to the outer surface of the venturi assembly (31) by a clamp (325); and a cloth bag (326) covering the bag cage frame (324) and clamped by the flange assembly (32).

2. The sealed high-temperature dust collector according to claim 1, characterized in that, The venturi assembly (31) is provided with a flange (311) at its end, and the venturi assembly (31) is suspended on the tube sheet (2).

3. The sealed high-temperature dust collector according to claim 1, characterized in that, The end of the cage frame (324) is hinged with a contact adapter plate (3241).

4. The sealed high-temperature dust collector according to claim 3, characterized in that, The contact adapter plate (3241) has a through hole (32411), and the outer wall of the venturi assembly (31) has bolt holes (312) corresponding to the through hole (32411) arranged in an array around it.

5. The sealed high-temperature dust collector according to claim 1, characterized in that, The circumference of the perforated plate hole (21) is provided with a perforated plate through hole (22) corresponding to the mounting hole of the flange assembly (32).

6. The sealed high-temperature dust collector according to claim 1, characterized in that, A sealing strip (323) is provided between the upper flange (321) and the lower flange (322). The lower flange (322) has annularly distributed sealing grooves (3221), and the sealing strip (323) is installed in the sealing grooves (3221).

7. The sealed high-temperature dust collector according to claim 6, characterized in that, The end of the cloth bag (326) is pressed between the sealing groove (3221) and the sealing strip (323).

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