Bag type dust collector suitable for rotary kiln

Abstract

The invention relates to the technical field of environmental protection equipment, in particular to a bag type dust collector suitable for a rotary kiln. Comprising a main shell, a pattern plate is fixedly connected in the main shell, filter bags which are uniformly distributed are clamped in the pattern plate, and a cage framework mechanism is arranged in each filter bag; the cage framework mechanism comprises a fixing sleeve which is arranged on the filter bag in a sleeving mode, the fixing sleeve is rotationally connected with an installation ring, the installation ring is fixedly connected with annularly-distributed supporting elastic strips, the supporting elastic strips are provided with sliding frames, and the sliding frames are in sliding connection with a control ring. The supporting elastic strips are used as longitudinal ribs of the cage framework, the control rings are used as transverse ribs of the cage framework, and the cage framework is folded and stretched under the condition that the structural strength of the cage framework is kept, so that the contact area between the cage framework and a filter bag is reduced in the process of inserting the cage framework into the filter bag, and the friction force between the cage framework and the filter bag is reduced; therefore, the probability that the filter bag falls off and is scratched is reduced, the mounting efficiency is improved, and the filter bag cost and shutdown loss are reduced.

Description

Technical Field

[0001] This invention relates to the field of environmental protection equipment technology, and in particular to a bag filter suitable for rotary kilns. Background Technology

[0002] Baghouse dust collectors are high-efficiency dust removal devices that use fiber filter bags to capture solid particles in dust-laden gas. Through filtration and cleaning processes, they purify the gas and reduce atmospheric pollution. In rotary kiln systems, they are widely used to treat high-temperature, high-dust-concentration flue gas, effectively controlling dust emissions and meeting environmental protection requirements. During operation, a significant pressure difference forms inside and outside the filter bag due to airflow resistance. To maintain the ideal working shape of the filter bag (avoiding excessive collapse and wrinkling), a matching cage is installed inside as a support frame. When replacing filter bags and cages, workers must first insert the folded or rolled-up new filter bag through the perforated tube sheet into the housing, accurately positioning the elastic expansion ring at the bag opening at the edge of the perforated tube sheet. Initial fixation is achieved through the tension of the expansion ring. Then, the cage is inserted into the filter bag. During this process, the filter bag is affected by friction between it and the cage, which can cause the filter bag to detach from the perforated tube sheet, resulting in it falling off. Once inside the baghouse dust collector, workers need to invest extra time and effort to retrieve and reinstall the filter bags, slowing down the overall installation progress and resulting in low work efficiency. In addition, since the cage is welded from horizontal and vertical ribs, if the welding points are not thoroughly ground, leaving burrs, welding slag, or sharp edges, these can easily scratch, snag, or even tear the relatively fragile filter bag fibers during the insertion of the cage into the filter bag. Once the filter bag is scratched or damaged, its filtration performance will be severely reduced or even fail, causing a short circuit in the dust-laden airflow and exceeding the dust emission concentration standard. This requires immediate shutdown for secondary replacement, resulting in additional filter bag costs and downtime losses. Summary of the Invention

[0003] This invention provides a bag filter suitable for rotary kilns, overcoming the shortcomings of existing cages that scratch filter bags and cause them to fall off during use.

[0004] Technical solution: A bag filter suitable for rotary kilns, comprising: a main shell, wherein the main shell is provided with an air inlet pipe, an ash discharge pipe and an exhaust pipe, a tube sheet is fixedly connected to the upper part of the main shell, a plurality of filter bags are clamped on the tube sheet, each of the filter bags is provided with a cage mechanism for providing internal support, and a cleaning component for cleaning the filter bags is provided in the main shell; The cage mechanism includes: a fixed sleeve fitted onto the upper part of the filter bag; a mounting ring rotatably connected to the fixed sleeve; a plurality of ring-shaped support springs fixedly connected to the lower side of the mounting ring; each support spring having an equidistant and equal number of sliding frames on its side near the central axis of the mounting ring; the height of the sliding frames gradually decreasing in the direction gradually moving away from the central axis of the mounting ring; all sliding frames of the same height being slidably connected to a control ring; and an adjustment component for adjusting the height of the control ring on each fixed sleeve.

[0005] Furthermore, the adjustment component includes: The system includes multiple connecting ribs, an adjusting rod, a mounting cylinder, and a locking element. All control rings are fixedly connected to the connecting ribs, and the upper parts of all connecting ribs are fixedly connected to the adjusting rod. The mounting cylinder is disposed on the fixing sleeve, and the mounting cylinder is rotatably connected to the locking element. The locking element is threadedly connected to the adjusting rod.

[0006] Furthermore, the cleaning component includes: The system comprises multiple cleaning pipes, multiple extensions, and multiple electric push rods. The cleaning pipes are fixedly connected to the main housing and located above the tube sheet. The cleaning pipes are connected to an external high-voltage pulse module. Each cleaning pipe has equidistantly distributed branch pipes, each branch pipe corresponding to a filter bag. Each branch pipe is located above an adjacent filter bag and is coaxial with the adjacent filter bag. Each branch pipe is sealed and slidably connected to the adjacent extension. The tube sheet is fixedly connected to the electric push rods. All the cleaning pipes are divided into groups with the same number of electric push rods. All extensions on the cleaning pipes in the same group are interconnected by connecting rods and fixedly connected to the telescopic ends of the adjacent electric push rods.

[0007] Furthermore, an elastic sheet is fixedly connected to the lower part of the support spring strip. The elastic sheet is used to support the bottom of the adjacent filter bags, and all the elastic sheets in the same filter bag are connected to a connecting plate.

[0008] Furthermore, the fixing sleeve and the adjacent mounting cylinder are jointly fixed with a plurality of elastic arc strips distributed in an annular pattern. The mounting cylinder is slidably connected to the fixing sleeve. The inner diameter of the extension is larger than the maximum diameter of the adjusting rod. The extension is used to compress the adjacent mounting cylinder.

[0009] Furthermore, the elastic coefficient of the elastic arc strip is greater than that of the supporting elastic strip.

[0010] Furthermore, it also includes: An equal number of tilt adjustment components are disposed on adjacent sliding frames to adjust the tilt angle of the sliding frames relative to the horizontal plane. Each tilt adjustment component includes: A connecting strip and an adjusting member are provided. The connecting strip is fixedly connected to the adjacent support spring strip. The connecting strip passes through the sliding frame and is slidably connected to it. The sliding frame is hinged to the adjacent support spring strip. The connecting strip is located above the hinge point between the sliding frame and the support spring strip. The sliding frame is rotatably connected to the adjusting member. The adjusting member is threadedly connected to the connecting strip.

[0011] Furthermore, the filter bag is provided with a plurality of equally spaced horizontal support components for providing support to the filter bag, the horizontal support components including: The filter bag is provided with a number of supporting arc strips equal to the number of supporting elastic strips and a number of sliding arc strips equal to the number of supporting elastic strips. The supporting arc strips and the sliding arc strips are respectively fixed to both sides of the adjacent supporting elastic strips, and the supporting arc strips on two adjacent supporting elastic strips are slidably connected to the sliding arc strips. The supporting arc strips are used to support the filter bag.

[0012] Furthermore, all the support arcs on the same support spring are staggered with all the sliding frames.

[0013] Furthermore, a trigger groove is provided on the side of the support arc strip near the central axis of the filter bag, and a protrusion is provided on the end of the sliding arc strip away from the support elastic strip fixed to it. The trigger groove is used to limit the adjacent protrusion.

[0014] The advantages and positive effects of this invention compared with the prior art are as follows: This invention uses support springs as longitudinal ribs of the cage and control rings as transverse ribs of the cage, achieving the closing and opening movements of the cage while maintaining the structural strength of the cage. This reduces the contact area between the cage and the filter bag during the insertion of the cage into the filter bag, thus reducing the friction between the cage and the filter bag. This reduces the probability of the filter bag falling off and being scratched, improves installation efficiency, and reduces filter bag costs and downtime losses.

[0015] By extending the branch pipe with an extension component, the distance between the dust removal pipe and the filter bag in the dust removal stage is increased, thereby maximizing the opening area at the top of the filter bag, reducing the flow resistance of the dust removal pipe to the gas, and reducing the amount of dust particles in the gas adhering in the dust removal pipe and the branch pipe, thus maintaining the best high-pressure pulse cleaning effect.

[0016] The installation cylinder is supported by an elastic arc strip, allowing it to slide relative to the fixed sleeve. This enables the cage to retract automatically during filter bag cleaning, increasing the gap between the cage and the filter bag and thus increasing the vibration amplitude of the filter bag. This not only allows the cage to open the filter bag and eliminate wrinkles on the filter bag surface to the greatest extent, but also does not affect the vibration cleaning of the filter bag.

[0017] The relative position of the connecting strip and the sliding frame is controlled by the adjusting component, thereby controlling the tilt angle of the sliding frame relative to the horizontal plane. This allows for adjustment of the contraction and expansion rate at various positions of the cage, enabling targeted cleaning of the filter bag based on the amount of dust particles attached to different positions and the varying cleaning efficiency at those positions. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the perforated plate and filter bag of the present invention; Figure 3 This is a three-dimensional structural diagram of the cleaning pipe and electric push rod of the present invention; Figure 4 This is a three-dimensional structural diagram of the supporting elastic bar and connecting rib bar of the present invention; Figure 5 This is a three-dimensional structural diagram of the fixing sleeve and control ring of the present invention; Figure 6 This is a three-dimensional structural diagram of the supporting spring bar and control ring of the present invention; Figure 7 This is a three-dimensional structural diagram of the mounting cylinder and elastic arc strip of the present invention; Figure 8 This is a three-dimensional structural diagram of the control ring and connecting ribs of the present invention; Figure 9 This is a three-dimensional structural diagram of the adjusting rod and locking component of the present invention; Figure 10 This is a three-dimensional structural diagram of the cleaning pipe and extension of the present invention; Figure 11 This is a three-dimensional structural diagram of the elastic sheet and connecting disc of the present invention; Figure 12 This is a three-dimensional structural diagram of the connecting strip and adjusting member of the present invention; Figure 13 This is a three-dimensional structural diagram of the supporting arc strip and the sliding arc strip of the present invention.

[0019] In the diagram: 1-Main housing, 101-Inlet pipe, 102-Ash discharge pipe, 103-Exhaust pipe, 2-Tube plate, 3-Filter bag, 4-Fixing sleeve, 5-Mounting ring, 6-Support spring strip, 7-Sliding frame, 8-Control ring, 9-Connecting rib, 10-Adjusting rod, 11-Mounting cylinder, 12-Locking component, 13-Ash cleaning pipe, 131-Branch pipe, 14-Extension component, 15-Electric push rod, 16-Elastic sheet, 17-Connecting disc, 18-Elastic arc strip, 19-Connecting strip, 20-Adjusting component, 21-Support arc strip, 211-Trigger groove, 22-Sliding arc strip, 221-Protrusion. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0021] Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the invention, and should not be construed as limiting the invention.

[0022] Example 1 This embodiment discloses a bag filter suitable for rotary kilns to reduce the probability of scratching the filter bags and the filter bags falling off during the installation of the cage.

[0023] See Figures 1-6 A bag filter for rotary kilns includes: a main shell 1, which is provided with an inlet pipe 101, an ash discharge pipe 102, and an exhaust pipe 103. A tube sheet 2 is fixedly connected to the upper part of the main shell 1. The tube sheet 2 has seven rows and eight columns of evenly distributed perforations. A filter bag 3 is snapped into each perforation of the tube sheet 2. (Reference) Figure 4 The upper part of the filter bag 3 is an elastic expansion ring. Each filter bag 3 is provided with a cage mechanism to provide internal support. The main housing 1 is provided with a cleaning component for cleaning the filter bag 3.

[0024] See Figures 4-9 The cage mechanism includes: a fixing sleeve 4, which is fitted onto the upper part of the filter bag 3 to provide internal support for the expansion ring on the upper part of the filter bag 3, preventing the expansion ring on the upper part of the filter bag 3 from wrinkling and detaching from the plate hole; the fixing sleeve 4 is rotatably connected to an installation ring 5 (see reference). Figure 6The fixing sleeve 4 consists of an upper ring and two lower half-rings. The two lower half-rings hold the mounting ring 5 in place of the upper ring of the fixing sleeve 4, achieving a rotatable connection between the fixing sleeve 4 and the mounting ring 5. Nine ring-shaped support springs 6 are fixedly attached to the lower side of the mounting ring 5. The support springs 6 are made of elastic metal and have a circular cross-section. In a free state (i.e., when the support springs 6 are not under force and do not bend), the support springs 6 are tilted, moving towards the central axis of the mounting ring 5 from top to bottom. Each support spring 6 has four equally spaced sliding frames 7 on the side closest to the central axis of the mounting ring 5. The sliding frame 7 is equipped with a sliding groove. The sliding groove of the sliding frame 7 is inclined from top to bottom in a direction away from the central axis of the mounting ring 5 (hereinafter, the acute angle formed by the center line of the sliding groove on the sliding frame 7 and the horizontal plane will be referred to as the inclination angle). Nine sliding frames 7 at the same height are slidably connected to a control ring 8. The diameter of the control ring 8 at the sliding position inside the sliding frame 7 is smaller than the diameter at the other positions, and the control ring 8 is in contact with both sides of the adjacent sliding frame 7. In this way, the center line of the sliding groove on all sliding frames 7 always passes through the central axis of the mounting ring 5, preventing the sliding frame 7 from tilting. Each fixed sleeve 4 is equipped with an adjustment component for adjusting the height of the control ring 8.

[0025] The above setup enables the cage to contract and expand while maintaining its structural strength. This reduces the contact area between the cage and the filter bag 3 during insertion, thus decreasing the friction and reducing the probability of the filter bag 3 falling off or being scratched. This improves installation efficiency and reduces the cost of the filter bag 3 and downtime losses.

[0026] See Figure 5 , Figure 6 , Figure 8 and Figure 9 The adjustment assembly includes: three evenly distributed connecting ribs 9 in a ring, an adjusting rod 10, a mounting cylinder 11, and a locking element 12. All control rings 8 are fixedly connected to the connecting ribs 9, and the upper part of all connecting ribs 9 is fixedly connected to the adjusting rod 10. The mounting cylinder 11 is set on the fixing sleeve 4. The adjusting rod 10, the fixing sleeve 4, the mounting cylinder 11, and the mounting rings 5 ​​are all coaxial. The mounting cylinder 11 is rotatably connected to the locking element 12, and the locking element 12 is threadedly connected to the adjusting rod 10.

[0027] The above settings enable the adjusting rod 10 to move via the locking element 12, which in turn drives the control ring 8 to move via the connecting rib 9, changing the height of the control ring 8 and causing it to slide within the sliding frame 7. This alters the distance between the support spring 6 and the central axis of the mounting ring 5, thus achieving the closing and opening movements of the cage frame.

[0028] It should be noted that in this embodiment, the sliding frame 7 and the adjacent support spring 6 can be considered as fixedly connected, and the mounting cylinder 11 and the fixing sleeve 4 can be considered as fixedly connected. The parts located inside the filter bag 3 that provide support are collectively referred to as cage bones. The cage bones provide support for the filter bag 3 but do not make the filter bag 3 fully open (in this state, the filter bag 3 does not stack). The purpose is to leave room for vibration during the cleaning of the filter bag 3. The state of the filter bag 3 inside the main housing 1 is divided into two stages: dust removal and vibration cleaning. The dust removal stage is to filter dust using the filter bag 3, and the vibration cleaning stage is to clean the dust particles attached to the surface of the filter bag 3.

[0029] The steps for controlling the retraction and expansion of the cage bones after adopting the above settings are as follows: The cage bones in the attached diagram are in the expanded state. The following explanation will take the retraction operation of one cage bone as an example. The expansion operation of the cage bone is the reverse step of the retraction operation. The worker uses a tool to rotate the locking part 12. The locking part 12 moves down through the threaded transmission adjusting rod 10. The adjusting rod 10 drives the four control rings 8 to move down through the connecting ribs 9, so that the control rings 8 slide within the adjacent sliding frame 7. This causes the sliding frame 7 to move towards the central axis of the mounting ring 5. The sliding frame 7 guides the adjacent support springs 6 to bend, so that the nine support springs 6 retract simultaneously. When the control rings 8 move to the bottom of the adjacent sliding frame 7, the nine support springs 6 are in a state of no force and no bending. At this time, the rotation of the locking part 12 is stopped.

[0030] See Figures 1-3 and Figure 10 The cleaning assembly includes eight cleaning pipes 13, seven rows and eight columns of extensions 14, and two electric push rods 15. The cleaning pipes 13 are fixed inside the main housing 1 and located above the tube sheet 2. The cleaning pipes 13 are connected to an external high-pressure pulse module through pulse valves and are used to transmit high-pressure pulse gas. The eight cleaning pipes 13 are located above the eight columns of plate holes. Each cleaning pipe 13 is provided with seven equally spaced branch pipes 131. Each branch pipe 131 corresponds to a filter bag 3. The branch pipe 131 is located above the adjacent filter bag 3 and is coaxial with the adjacent filter bag 3. The branch pipe 131 is sealed and limited to slide with the adjacent extension 14. The electric push rod 15 is fixedly connected to the tube sheet 2. The eight dust removal pipes 13 are divided into two groups, left and right. All extension parts 14 corresponding to the four adjacent dust removal pipes 13 in each group are connected as one unit by a connecting rod. The two groups of extension parts 14 connected as one unit are fixedly connected to the telescopic ends of the adjacent electric push rods 15. In actual use, according to the cleaning frequency, cleaning requirements and other conditions, the eight columns of extension parts 14 can be freely combined into several groups, and the number of electric push rods 15 is increased simultaneously, so that each group of extension parts 14 corresponds to one electric push rod 15, thus achieving the purpose of dust removal and self-cleaning at the same time. During the dust removal stage, the distance between the extension parts 14 and the tube sheet 2 is at its maximum.

[0031] The above settings enable the increase of the distance between the dust removal tube 13 and the filter bag 3 by extending the branch tube 131 using the extension 14, thereby maximizing the opening area at the upper end of the filter bag 3, reducing the flow resistance of the dust removal tube 13 to the gas, and reducing the amount of dust particles in the gas adhering to the dust removal tube 13 and the branch tube 131, thus maintaining the best high-pressure pulse cleaning effect.

[0032] See Figure 5 and Figure 11 An elastic sheet 16 is fixedly attached to the lower part of the support elastic strip 6. The elastic sheet 16 is made of elastic metal. The elastic coefficient of the elastic sheet 16 is less than that of the support elastic strip 6. The elastic sheet 16 in the attached figure is in a state with a small degree of bending after deformation (that is, the elastic sheet 16 has a greater degree of bending when it is not under force). All the elastic sheets 16 in the same filter bag 3 are connected to a connecting plate 17. The connecting plate 17 is used to connect all the elastic sheets 16 into one piece.

[0033] The above settings enable the elastic sheet 16 to deform and store force, which facilitates the swing of the lower end of the elastic bar 6, allowing the connecting rib 9 to bear more tensile stress. This allows the connecting rib 9 to reduce its diameter while achieving the contraction and expansion of the transmission cage, thereby reducing the overall mass of the cage.

[0034] During the cage's retraction process, the connecting rib 9 bears tensile stress. The connecting rib 9 guides the supporting elastic strip 6 and the elastic plate 16 to deform and store force together through the control ring 8 and the sliding frame 7. During the cage's expansion process, under the action of the elastic force of the supporting elastic strip 6 and the elastic plate 16, the control ring 8 and the connecting rib 9 are driven to move downward through the sliding frame 7, so that the connecting rib 9 also bears tensile stress. In this way, the diameter of the connecting rib 9 can be reduced, and the overall mass of the cage can be reduced.

[0035] The workflow for replacing one of the filter bags 3 after adopting the above settings is as follows: The worker stops the machine and uses tools to remove the cleaning pipe 13 above the filter bag 3 to be replaced. Then, the cage is retracted to facilitate its removal. At this time, the fixing sleeve 4 is lifted upward to allow the cage to come out of the filter bag 3. Then, the expansion ring on the upper part of the filter bag 3 is pressed, and the expansion ring of the filter bag 3 is disconnected from the plate hole of the tube sheet 2. At this time, the worker pulls the filter bag 3 upward and replaces it with a new filter bag 3. After the new filter bag 3 is snapped into the plate hole, the worker inserts the retracted cage into the filter bag 3. After the fixing sleeve 4 contacts the filter bag 3, the cage is controlled to expand to open the filter bag 3. This completes the replacement of the filter bag 3.

[0036] The steps for cleaning the filter bag 3 during the dust removal stage are as follows: During the dust removal stage, the dust-laden gas entering the main housing 1 through the inlet pipe 101 passes through the filter bag 3, and the dust particles are blocked on the outer side of the filter bag 3. When it is necessary to clean the filter bag 3, the two electric push rods 15 are controlled to extend and retract one by one. When the extension end of the electric push rod 15 on the right retracts, the extension end of the electric push rod 15 drives the corresponding extension part 14 to move down through the connecting rod, so that the extension part 14 moves closer to the adjacent filter bag 3. When the extension part 14 contacts the adjacent mounting cylinder 11, the electric push is stopped. Rod 15 activates the high-pressure pulse module and the pulse valves corresponding to the four cleaning pipes 13 on the right, allowing high-pressure pulse gas to enter the four cleaning pipes 13 on the right. The high-pressure pulse gas in the cleaning pipes 13 enters the corresponding filter bags 3 through the branch pipes 131 and the extension 14, causing the filter bags 3 to be quickly opened and vibrated, shaking off the dust adhering to the outer surface of the filter bags 3. Subsequently, the filter bags 3 re-contract under the action of the internal and external pressure difference. Thus, when the next pulse gas is injected into the filter bags 3, the filter bags 3 are opened and vibrated again, thereby cleaning the filter bags 3.

[0037] After cleaning the filter bags 3 in the seven rows and four columns on the right, extend the telescopic end of the electric push rod 15 on the right, causing the corresponding extension part 14 to move upward, so that the extension part 14 loses contact with the adjacent mounting cylinder 11. At this time, retract the telescopic end of the electric push rod 15 on the left and repeat the above steps to achieve sequential cleaning of all filter bags 3 in different areas.

[0038] Example 2 This embodiment discloses a bag filter suitable for rotary kilns, which is further optimized based on Embodiment 1.

[0039] See Figure 6 and Figure 7 The fixed sleeve 4 and the adjacent mounting cylinder 11 are jointly fixed with six ring-shaped elastic arc strips 18. The mounting cylinder 11 and the fixed sleeve 4 are slidably connected. The inner diameter of the extension 14 is larger than the maximum diameter of the adjusting rod 10, so that the extension 14 can be fitted on the outside of the adjusting rod 10. The extension 14 is used to squeeze the adjacent mounting cylinder 11. The elastic coefficient of the elastic arc strip 18 is larger than the elastic coefficient of the supporting elastic strip 6, so that when the cage is in a relaxed state, the elastic force of the elastic arc strip 18 keeps the supporting elastic strip 6 in a bent and stored state.

[0040] The above settings enable the elastic arc strip 18 to provide support for the mounting cylinder 11, allowing the mounting cylinder 11 to slide relative to the fixed sleeve 4. This allows the cage to automatically retract during the cleaning of the filter bag 3, increasing the gap between the cage and the filter bag 3 and thus increasing the vibration amplitude of the filter bag 3. This not only allows the cage to open the filter bag 3, minimizing wrinkles on the surface of the filter bag 3, but also does not affect the vibration cleaning of the filter bag 3.

[0041] It should be noted that during the dust removal stage in this embodiment, the cage can provide sufficient support for the filter bag 3, so that the filter bag 3 remains open during the dust removal stage.

[0042] After adopting the above settings, the state of the filter bag 3 during the dust removal stage is as follows: the filter bag 3 is opened by nine support springs 6, so that the sides of the filter bag 3 are kept open, eliminating wrinkles on the surface of the filter bag 3, and making dust particles evenly adhere to the surface of the filter bag 3.

[0043] During the vibration cleaning stage, as the extension 14 moves downward, it contacts the adjacent mounting cylinder 11 and pushes it downward. The mounting cylinder 11 compresses the adjacent elastic arc strip 18, causing it to bend. The locking member 12 then drives the adjusting rod 10 downward. This process of lowering the adjusting rod 10 is repeated to close the cage, thus providing a margin for the vibration of the filter bag 3 and ensuring normal vibration cleaning of the filter bag 3. After the cleaning is completed, as the extension 14 moves upward, the elastic arc strip 18 pushes the mounting cylinder 11 upward and resets due to its own elasticity. During this process, the mounting cylinder 11 drives the adjusting rod 10 upward through the locking member 12, causing the cage to expand.

[0044] Example 3 This embodiment discloses a bag filter suitable for rotary kilns, which provides the function of controlling the gap between the cage and the filter bag at different positions based on Embodiment 2.

[0045] See Figure 11 and Figure 12 It also includes: an equal number of tilt adjustment components to the sliding frame 7, which are respectively set on adjacent sliding frames 7 to adjust the tilt angle of the sliding frame 7 relative to the horizontal plane. The tilt adjustment components include: a connecting strip 19 and an adjusting member 20. The connecting strip 19 is fixedly connected to the adjacent support spring strip 6. The connecting strip 19 is made of elastic metal material, and stainless steel is selected here. The connecting strip 19 passes through the upper part of the sliding frame 7 and is slidably connected to it. The lower part of the sliding frame 7 is hinged to the adjacent support spring strip 6 so that the tilt angle of the sliding frame 7 can be adjusted. The sliding frame 7 is rotatably connected to the adjusting member 20. The adjusting member 20 is threadedly connected to the connecting strip 19. The connection method between the connecting strip 19 and the adjusting member 20 is the same as the hose clamp fastening method.

[0046] The above settings enable the adjustment of the relative position of the connecting strip 19 and the sliding frame 7 by the adjusting component 20, thereby controlling the tilt angle of the sliding frame 7 relative to the horizontal plane, and adjusting the contraction and relaxation rate of each position of the cage bone. Thus, when cleaning the filter bag 3, targeted cleaning can be carried out according to the amount of dust particles attached to different positions on the filter bag 3 and the different cleaning efficiencies of different positions.

[0047] The cleaning process for filter bag 3 after adopting the above settings is as follows: During the vibration cleaning stage, since filter bag 3 is long and thin, the high-pressure pulse gas enters from the upper port of filter bag 3 and flows downward along filter bag 3. During the flow, filter bag 3 is stretched open. However, due to the loss of high-pressure pulse gas, the vibration force of filter bag 3 gradually weakens in the downward direction, resulting in low cleaning efficiency of filter bag 3. To solve the above problem, before installing the cage, the worker can adjust the tilt angle of the sliding frame 7 according to factors such as the power of the high-pressure pulse module used in this device and the firmness of the dust adhering to the filter bag 3. In the top-down direction, the tilt angle of the sliding frame 7 is gradually reduced. As all control rings 8 in the same filter bag 3 move down to the same height, the horizontal distance of the sliding frame 7 in the top-down direction gradually increases. Consequently, the distance between the filter bag 3 and the cage gradually increases in the top-down direction. This gradually increases the vibration amplitude of the lower part of the filter bag 3, thereby making the vibration intensity of the filter bag 3 more consistent at various points during the vibration cleaning stage. This makes the cleaning rate of the filter bag 3 at different heights more consistent, improving the cleaning efficiency and reducing the number of vibration cleaning cycles of the filter bag 3.

[0048] Example 3 This embodiment discloses a bag filter suitable for rotary kilns, which enhances the cage strength based on Embodiment 3.

[0049] See Figure 5 and Figure 13 The filter bag 3 is provided with three equally spaced horizontal support components to provide support for the filter bag 3. The horizontal support components include: nine support arc strips 21 and nine sliding arc strips 22. The support arc strips 21 and sliding arc strips 22 are both made of elastic metal and their surfaces are polished to reduce the friction between them and the filter bag 3. The support arc strips 21 and sliding arc strips 22 are respectively fixed to both sides of the adjacent support spring strips 6, and the support arc strips 21 and sliding arc strips 22 on two adjacent support spring strips 6 are slidably connected. The support arc strips 21 are used to support the filter bag 3. All the support arc strips 21 on the same support spring strip 6 are staggered with all the sliding frames 7 to provide segmented support for the support spring strip 6 and enhance the strength of the support spring strip 6.

[0050] The above settings enable the filter bag 3 to be supported by the support arc strip 21 and the sliding arc strip 22, reducing wrinkles on the surface of the filter bag 3, while connecting all the support spring strips 6 into one piece to enhance the overall bending resistance of the cage.

[0051] See Figure 13 A trigger groove 211 is provided on the side of the support arc strip 21 near the central axis of the filter bag 3, and a protrusion 221 is provided on the end of the sliding arc strip 22 away from the support spring strip 6 fixed to it. The trigger groove 211 is used to limit the adjacent protrusion 221. (See...) Figure 13When the cage bones are in the extended state, the protrusion 221 is not located in the adjacent trigger groove 211.

[0052] The above settings enable the following: during the process of closing or opening the cage, the trigger groove 211 limits the protrusion 221, hindering the movement of the support spring 6. This causes the local deformation of the support spring 6 at the connection between the sliding arc 22 and the support spring 6 to be slower than the local deformation at the connection between the sliding frame 7 and the support spring 6. This causes the support spring 6 to bend locally, store energy, and vibrate, assisting in the separation of the cage and the filter bag 3.

[0053] During the cage bone retraction process, the distance between two adjacent support springs 6 decreases, causing the support arc 21 and sliding arc 22 to slide relative to each other. Simultaneously, the trigger groove 211 and protrusion 221 move closer together until the trigger groove 211 contacts the protrusion 221. At this point, the trigger groove 211 limits the protrusion 221, and the support arc 21 and sliding arc 22 temporarily stop sliding relative to each other, causing the support springs 6 to undergo local bending deformation. With the deformation of the support springs 6, the two support springs 6... The force driving the supporting arc strip 21 and the sliding arc strip 22 to move relative to each other gradually increases until it overcomes the limitation of the trigger groove 211 on the protrusion 221, causing the supporting arc strip 21 and the sliding arc strip 22 to slide quickly. The original bent and deformed position of the supporting elastic strip 6 is quickly restored, and the supporting elastic strip 6 vibrates as a whole. When the cage bone closes, the vibration of the supporting elastic strip 6 helps the cage bone and the filter bag 3 to separate. When the cage bone expands, the vibration helps the supporting elastic strip 6 to open the folds of the filter bag 3.

[0054] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. 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 of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A bag filter suitable for rotary kilns, characterized in that, include: The main housing (1) is provided with an air inlet pipe (101), an ash discharge pipe (102) and an exhaust pipe (103). A perforated plate (2) is fixedly connected to the upper part of the main housing (1). Multiple filter bags (3) are evenly distributed in the perforated plate (2). Each filter bag (3) is provided with a cage mechanism for providing internal support. A cleaning component for cleaning the filter bags (3) is provided inside the main housing (1). The cage mechanism includes: a fixed sleeve (4) fitted on the upper part of the filter bag (3), the fixed sleeve (4) being rotatably connected to an installation ring (5), and a plurality of ring-shaped support springs (6) fixedly connected to the lower side of the installation ring (5). Each support spring (6) is provided with an equally spaced sliding frame (7) on the side near the central axis of the installation ring (5). The height of the sliding frame (7) gradually decreases in the direction gradually away from the central axis of the installation ring (5). All the sliding frames (7) of the same height are slidably connected to a control ring (8). Each fixed sleeve (4) is provided with an adjustment component for adjusting the height of the control ring (8).

2. A bag filter for rotary kilns according to claim 1, characterized in that, The adjustment component includes: Multiple connecting ribs (9), adjusting rods (10), mounting cylinders (11) and locking elements (12) are provided. All the control rings (8) are fixedly connected to the connecting ribs (9). The upper part of all the connecting ribs (9) is fixedly connected to the adjusting rods (10). The mounting cylinders (11) are disposed on the fixing sleeves (4). The mounting cylinders (11) are rotatably connected to the locking elements (12). The locking elements (12) are threadedly connected to the adjusting rods (10).

3. A bag filter for rotary kilns according to claim 2, characterized in that, The cleaning component includes: The system includes multiple cleaning pipes (13), multiple extensions (14), and multiple electric push rods (15). The cleaning pipes (13) are fixed inside the main housing (1) and located above the tube sheet (2). The cleaning pipes (13) are connected to an external high-voltage pulse module. Each cleaning pipe (13) has equidistantly distributed branch pipes (131), each branch pipe (131) corresponding to a filter bag (3). Each branch pipe (131) is located above an adjacent filter bag (3). The branch pipe (131) is coaxial with the adjacent filter bag (3), the branch pipe (131) is sealed and limited to the adjacent extension (14) in a sliding connection, the tube plate (2) is fixed to the electric push rod (15), all the cleaning pipes (13) are divided into groups with the same number of electric push rods (15), and all the extensions (14) on the cleaning pipes (13) in the same group are connected to each other by a connecting rod and fixed to the telescopic end of the adjacent electric push rod (15).

4. A bag filter for rotary kilns according to claim 3, characterized in that, The lower part of the support spring bar (6) is fixed with an elastic sheet (16), the elastic sheet (16) is used to support the bottom of the adjacent filter bag (3), and all the elastic sheets (16) in the same filter bag (3) are connected to a connecting plate (17).

5. A bag filter for rotary kilns according to claim 3, characterized in that, The fixed sleeve (4) and the adjacent mounting cylinder (11) are jointly fixed with a plurality of elastic arc strips (18) distributed in an annular pattern. The mounting cylinder (11) is slidably connected to the fixed sleeve (4). The inner diameter of the extension (14) is larger than the maximum diameter of the adjusting rod (10). The extension (14) is used to squeeze the adjacent mounting cylinder (11).

6. A bag filter for rotary kilns according to claim 5, characterized in that, The elastic coefficient of the elastic arc strip (18) is greater than that of the elastic coefficient of the supporting elastic strip (6).

7. A bag filter for rotary kilns according to claim 4, characterized in that it further... include: An equal number of tilt adjustment components as the number of sliding frames (7) are respectively disposed on adjacent sliding frames (7) for adjusting the tilt angle of the sliding frames (7) relative to the horizontal plane. The tilt adjustment components include: A connecting strip (19) and an adjusting member (20) are provided. The connecting strip (19) is fixedly connected to the adjacent support spring (6). The connecting strip (19) passes through the sliding frame (7) and is slidably connected to it. The sliding frame (7) is hinged to the adjacent support spring (6). The connecting strip (19) is located above the hinge point between the sliding frame (7) and the support spring (6). The sliding frame (7) is rotatably connected to the adjusting member (20). The adjusting member (20) is threadedly connected to the connecting strip (19).

8. A bag filter for rotary kilns according to claim 7, characterized in that, The filter bag (3) is provided with a plurality of equally spaced horizontal support components for supporting the filter bag (3). The horizontal support components include: The number of support arc strips (21) equal to the number of support spring strips (6) and the number of sliding arc strips (22) equal to the number of support spring strips (6) are fixed to both sides of the adjacent support spring strips (6), and the support arc strips (21) on two adjacent support spring strips (6) are slidably connected to the sliding arc strips (22). The support arc strips (21) are used to support the filter bag (3).

9. A bag filter for rotary kilns according to claim 8, characterized in that, All the support arcs (21) on the same support spring (6) are staggered with all the sliding frames (7).

10. A bag filter for rotary kilns according to claim 8, characterized in that, The supporting arc strip (21) is provided with a trigger groove (211) on the side near the central axis of the filter bag (3), and the sliding arc strip (22) is provided with a protrusion (221) at the end away from the supporting elastic strip (6) to which it is fixed. The trigger groove (211) is used to limit the adjacent protrusion (221).

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