High-temperature dust remover and dust removal device
By combining internal filter metal filter bags and a rapping device with a differential pressure detection and control system, the problem of poor dust removal effect under high temperature and fine dust conditions is solved, achieving efficient dust removal and reduced energy consumption.
Patent Information
- Application Number
- CN202520315495.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-26
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2035-02-26
AI Technical Summary
Under high-temperature and fine dust conditions, dust becomes severely suspended after cleaning, resulting in poor cleaning effect, high filter bag pressure differential, and high operating energy consumption.
It adopts internal filter metal filter bags and rapping device, combined with differential pressure detection and control system, and achieves efficient dust removal through the design of vibration dust removal air duct and flue gas flow duct.
It effectively solves the problem of dust suspension under high temperature and fine dust conditions, reduces filter bag pressure difference and operating energy consumption, and improves dust removal effect.
Smart Images
Figure CN223914939U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of flue gas dust removal, and more specifically, to a high-temperature dust collector and dust removal device. Background Technology
[0002] The existing high-temperature metal filter bag dust collector has filter bags suspended on the tube sheet. The filter bags are external filters, and dust-laden flue gas enters the interior of the filter bags from the outer surface. The dust is separated on the outer surface of the filter bags. A blowpipe is installed above the bag opening, and compressed air pulse cleaning is used for cleaning.
[0003] For high-temperature flue gas where most dust particles are fine dust (particle size less than 1μm), the high flue gas temperature (greater than 300℃) intensifies molecular motion and increases momentum exchange between molecules, leading to increased flue gas viscosity. Changes in flue gas viscosity directly affect the settling velocity of dust particles in the gas. High-viscosity gas causes greater resistance to dust particles during settling, resulting in slower settling velocity. This phenomenon is more pronounced for extremely fine dust particles, causing fine dust to remain suspended in the gas chamber for a long time after pulse cleaning, making it difficult to settle into the ash hopper. The suspended dust easily re-adheres onto the filter bag surface, resulting in high pressure differential and high operating energy consumption of the dust collector.
[0004] Therefore, how to solve the problems of dust suspension, poor cleaning effect, high filter bag pressure difference, and high operating energy consumption after cleaning under high temperature and fine dust conditions is a technical problem that needs to be solved by those skilled in the art. Utility Model Content
[0005] The purpose of this utility model is to provide a high-temperature dust collector and dust removal device to solve the problems of dust suspension, poor dust removal effect, high filter bag pressure difference, and high operating energy consumption after dust removal under high temperature and fine dust conditions.
[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution.
[0007] This utility model provides a high-temperature dust collector, which includes: a shell, including a dust collection chamber and an ash hopper connected below the dust collection chamber;
[0008] A filter bag assembly is disposed inside the dust collection chamber. The filter bag assembly includes at least one internal filter metal filter bag, the opening of which faces the dust hopper.
[0009] A vibration device is used to vibrate the filter bag assembly;
[0010] An inlet flue is connected to the flue gas inlet of the housing, the flue gas inlet is connected to the interior of the internal filter metal filter bag, and an inlet damper is provided on the inlet flue;
[0011] An outlet flue is connected to the flue gas outlet of the housing, the flue gas outlet is connected to the outside of the internal filter metal filter bag, and an outlet damper is provided on the outlet flue.
[0012] A dust removal air duct is connected to the dust removal air inlet of the housing. The dust removal air duct is connected to the outside of the internal filter metal filter bag. A dust removal air damper is provided on the dust removal air duct. The dust removal air duct is used to introduce dust removal air.
[0013] In some embodiments of this application, the high-temperature dust collector further includes a tube sheet;
[0014] The tube sheet is located inside the dust removal chamber and is connected to the side wall of the dust removal chamber;
[0015] The perforated plate is provided with at least one perforated plate hole;
[0016] The internal filtration metal filter bag is connected above the tube sheet, and the internal filtration metal filter bag corresponds one-to-one with the holes of the tube sheet.
[0017] In some embodiments of this application, the tube sheet is connected to the bottom of the side wall of the dust collection chamber.
[0018] In some embodiments of this application, the axis of the internal filtration metal filter bag is vertically arranged, and the bag opening of the internal filtration metal filter bag faces downward.
[0019] In some embodiments of this application, the dust removal air vent is located on the top wall of the dust collection chamber.
[0020] In some embodiments of this application, the flue gas inlet is located on the side wall of the ash hopper and below the internal filter metal filter bag;
[0021] The flue gas outlet is located on the side wall of the dust collection chamber and above the internal filter metal filter bag.
[0022] In some embodiments of this application, the high-temperature dust collector further includes a differential pressure detector and a controller;
[0023] The differential pressure detector is used to detect the differential pressure inside the dust removal chamber;
[0024] The controller controls the rapping device, the inlet damper, the outlet damper, and the dust removal damper based on the differential pressure detected by the differential pressure detector.
[0025] In some embodiments of this application, the filter bag assembly further includes a hanging beam and a hanging connector;
[0026] The hanging beam is connected to the dust removal chamber;
[0027] The internal filtration metal filter bag is suspended on the hanging beam by the hanging connector, which can be a rigid connector or an elastic connector.
[0028] The vibrating device causes the internal filter metal filter bag to vibrate by vibrating the hanging beam.
[0029] This utility model also provides a dust removal device, including multiple high-temperature dust collectors as described in any of the above embodiments, wherein the flue gas inlets of the multiple high-temperature dust collectors are connected in parallel, the flue gas outlets of the multiple high-temperature dust collectors are connected in parallel, and the dust removal air outlets of the multiple high-temperature dust collectors are connected in parallel.
[0030] As can be seen from the above technical solution, the embodiments of this utility model have at least the following advantages and positive effects:
[0031] In the high-temperature dust collector of this utility model embodiment, the high-temperature dust collector first operates in dust removal mode, and the inlet damper and outlet damper are opened. The flue gas to be removed enters the shell through the flue gas inlet from the inlet flue. Due to the fine dust particle size and high flue gas temperature, a small portion of the dust settles into the ash hopper, while most of the dust enters the inner surface of the internal filter metal filter bag with the flue gas. The dust is collected on the inner surface of the filter bag, and after purification, the flue gas is discharged from the outlet flue through the flue gas outlet.
[0032] When dust accumulates to a certain amount on the inner surface of the filter bag, the high-temperature dust collector enters the cleaning state. The flue gas outlet damper is closed, the cleaning damper is opened, and the rapping device is activated. The rapping device vibrates the filter bag assembly, dislodging the dust from the inner surface of the filter bag. The cleaning air enters the housing from the cleaning duct through the cleaning inlet. The cleaning air blows from the outside of the internal filter metal filter bag to the inside, meaning the cleaning air enters the inner surface of the filter bag from the outer surface, carrying the dislodged dust into the ash hopper for collection.
[0033] During the dust removal process, the cleaning air can return to the inlet flue through the flue gas inlet, or it can be discharged with dust through the ash hopper discharge port to ensure that the pressure difference of the filter bags inside the shell is not too large. After the dust removal is completed, close the cleaning damper and the rapping device, then open the inlet damper and the outlet damper, and the high-temperature dust collector will start dust removal again.
[0034] The above methods can effectively solve the problems of dust suspension, poor cleaning effect, high filter bag pressure difference, and high operating energy consumption after cleaning under high temperature and fine dust conditions. Attached Figure Description
[0035] The various objectives, features, and advantages of this invention will become more apparent from the following detailed description of preferred embodiments in conjunction with the accompanying drawings. The drawings are merely illustrative illustrations of the invention and are not necessarily drawn to scale. In the drawings, the same reference numerals always denote the same or similar parts. Wherein:
[0036] Figure 1This is a schematic diagram of a high-temperature dust collector according to an exemplary embodiment.
[0037] Figure 2 This is a schematic diagram of a dust removal device according to an exemplary embodiment.
[0038] Figure 3 yes Figure 2 A schematic diagram of the structure from another angle.
[0039] The reference numerals in the attached drawings are explained as follows: 1. Shell; 11. Dust collection bin; 12. Ash hopper; 2. Filter bag assembly; 21. Internal filter metal filter bag; 22. Hanging beam; 23. Hanging connector; 3. Vibrating device; 4. Inlet flue; 41. Inlet damper; 5. Outlet flue; 51. Outlet damper; 6. Cleaning duct; 61. Cleaning damper; 7. Tube plate; 8. Support frame; 9. Ash conveying device. Detailed Implementation
[0040] Although the present invention can be readily embodied in various forms, only some specific embodiments are shown in the accompanying drawings and will be described in detail in this specification. It is understood that this specification should be regarded as an exemplary illustration of the principles of the present invention and is not intended to limit the present invention to what is described herein.
[0041] Therefore, a feature pointed out in this specification is used to describe one feature of one embodiment of the present invention, and does not imply that every embodiment of the present invention must have the described feature. Furthermore, it should be noted that this specification describes many features. Although certain features may be combined to illustrate possible system designs, these features may also be used in other combinations not explicitly stated. Therefore, unless otherwise stated, the described combinations are not intended to be limiting.
[0042] In the embodiments shown in the accompanying drawings, the directional indications (such as up, down, left, right, front, and back) used to explain the structure and movement of the various elements of this invention are relative rather than absolute. These descriptions are appropriate when these elements are in the positions shown in the drawings. If the descriptions of the positions of these elements change, these directional indications also change accordingly.
[0043] Please see Figure 1 The high-temperature dust collector provided in one embodiment of this utility model includes a shell 1, a filter bag assembly 2, a rapping device 3, an inlet flue 4, an outlet flue 5, and a dust removal duct 6.
[0044] The housing 1 includes a dust collection chamber 11 and an ash hopper 12 connected below the dust collection chamber 11. A filter bag assembly 2 is disposed inside the dust collection chamber 11, and the filter bag assembly 2 includes at least one internal filter metal filter bag 21, with the bag opening of the internal filter metal filter bag 21 facing the ash hopper 12. A rapping device 3 is used to rappel the filter bag assembly 2. An inlet flue duct 4 is connected to the flue gas inlet of the housing 1, and the flue gas inlet communicates with the interior of the internal filter metal filter bag 21. An inlet damper 41 is provided on the inlet flue duct 4. An outlet flue duct 5 is connected to the flue gas outlet of the housing 1, and the flue gas outlet communicates with the exterior of the internal filter metal filter bag 21. An outlet damper 51 is provided on the outlet flue duct 5. A cleaning duct 6 is connected to the cleaning air outlet of the housing 1, and the cleaning duct 6 communicates with the exterior of the internal filter metal filter bag 21. A cleaning damper 61 is provided on the cleaning duct 6, and the cleaning duct 6 is used to introduce cleaning air.
[0045] The high-temperature dust collector first operates in dust removal mode, with the inlet damper 41 and outlet damper 51 opened. The flue gas to be removed enters the housing 1 through the flue gas inlet from the inlet flue 4. The flue gas to be removed enters the internal filter metal filter bag 21 for filtration. The dust is collected on the inner surface of the filter bag. After purification, the flue gas is discharged from the outlet flue 5 through the flue gas outlet.
[0046] When the dust accumulates to a certain amount on the inner surface of the filter bag, the high-temperature dust collector enters the dust removal state. The flue gas outlet damper 51 is closed, the dust removal damper 61 is opened, and the rapping device 3 is activated. The rapping device 3 vibrates the filter bag assembly 2 by rapping it, causing the dust on the inner surface of the filter bag to be dislodged. The dust removal air enters the housing 1 from the dust removal duct 6 through the dust removal port. The dust removal air is blown from the outside of the internal filter metal filter bag 21 to the inside, that is, the dust removal air enters the inner surface of the filter bag from the outer surface of the filter bag, carrying the dislodged dust into the ash hopper 12 for collection.
[0047] During the dust removal process, the cleaning air can return to the inlet flue 4 through the flue gas inlet, or it can be discharged with dust through the discharge port of the ash hopper 12 to ensure that the pressure difference of the filter bags inside the shell 1 is not too large. After the dust removal is completed, the cleaning damper 61 and the rapping device 3 are closed, and then the inlet damper 41 and the outlet damper 51 are opened, and the high-temperature dust collector starts to operate in the dust removal state again.
[0048] The above methods effectively solve the problems of dust suspension, poor cleaning effect, high filter bag pressure difference, and high operating energy consumption after cleaning under high temperature and fine dust conditions. Because the internal metal filter bag 21 is installed inside the filter, it can provide a seal and prevent leakage, effectively filtering dust from the flue gas, thus achieving good filtration results. The cleaning air can be either purified flue gas or clean air. The internal metal filter bag 21 is made of metal, has excellent high-temperature resistance, and can withstand temperatures up to 1000℃, ensuring a long service life.
[0049] The high-temperature dust collector also includes a tube sheet 7, which is located inside the dust collection chamber 11 and connected to the side wall of the dust collection chamber 11. The tube sheet 7 has at least one tube sheet hole, and an internal filter metal bag 21 is connected above the tube sheet 7, with the internal filter metal bag 21 corresponding to the tube sheet hole 7 one by one.
[0050] The internal filter metal filter bag 21 is installed upside down on the tube sheet 7 with the bag opening facing the ash hopper 12. The vibrating device 3, in conjunction with the dust removal air, can cause the highly viscous fine dust on the inner surface of the filter bag to fall off and be collected into the ash hopper 12.
[0051] The number of perforated plate with 7 holes and internal filter metal bag 21 can be one or more, depending on the needs.
[0052] The size of the holes in the tube sheet 7 is similar to the size of the opening of the internal filter metal bag 21. This prevents the flue gas from leaking into the dust collection chamber 11 without being filtered by the internal filter metal bag 21 because the size of the holes in the tube sheet 7 is larger than the size of the opening of the internal filter metal bag 21. It also prevents the dust from falling onto the surface of the tube sheet 7 and not falling into the ash hopper 12 because the size of the holes in the tube sheet 7 is smaller than the size of the opening of the internal filter metal bag 21.
[0053] The perforated plate 7 serves as a partition between the dust collection bin 11 and the ash hopper 12. The perforated plate 7 is connected to the bottom of the side wall of the dust collection bin 11, which can make full use of the internal space of the dust collection bin 11 and improve the space utilization rate.
[0054] The axis of the internal filter metal bag 21 is vertically arranged, and the bag opening of the internal filter metal bag 21 faces downward, which facilitates the dust to fall off from the inner surface of the filter bag under the action of gravity. In other embodiments, the axis of the internal filter metal bag 21 does not have to be strictly vertical and may have some tilt angle.
[0055] The dust removal air vent is located on the top wall of the dust collection chamber 11. The dust removal air blows downwards, which is more conducive to blowing the dust downwards and making it fall into the dust hopper 12, thus improving the dust removal effect.
[0056] The flue gas inlet is located on the side wall of the ash hopper 12, below the internal filter metal bag 21. The flue gas outlet is located on the side wall of the dust collection chamber 11, above the internal filter metal bag 21. This ensures that the flue gas entering the ash hopper 12 from the flue gas inlet can smoothly enter the filter bag 21 through the bag opening below for filtration, and the clean flue gas filtered by the internal filter metal bag 21 can smoothly exit from the flue gas outlet above the internal filter metal bag 21. The flue gas inlet can also be located from the upper part of the ash hopper 12 to the lower part of the tube sheet 7.
[0057] The filter bag assembly 2 also includes a hanging beam 22 and a hanging connector 23. The hanging beam 22 is connected inside the dust collection chamber 11. The internal filter metal filter bag 21 is suspended on the hanging beam 22 via the hanging connector 23. The vibration device 3 vibrates the internal filter metal filter bag 21 by vibrating the hanging beam 22. The vibration device 3 can be an electromagnetic hammer. The hanging connector 23 can be a rigid connector to ensure structural strength, or an elastic connector to avoid stress concentration and structural damage.
[0058] The internal filter metal bag 21 can be easily installed through the hanging beam 22. By vibrating the hanging beam 22, the internal filter metal bag 21 vibrates, causing dust to fall off from the inner surface of the filter bag.
[0059] The high-temperature dust collector also includes a differential pressure detector and a controller. The differential pressure detector is used to detect the differential pressure inside the dust collection chamber 11. The controller controls the rapping device 3, the inlet damper 41, the outlet damper 51, and the cleaning damper 61 based on the differential pressure detected by the differential pressure detector. The differential pressure detector allows for precise control of the differential pressure inside the high-temperature dust collector. By controlling the rapping device 3, the inlet damper 41, the outlet damper 51, and the cleaning damper 61 through the controller, the high-temperature dust collector can switch between dust collection and cleaning modes at appropriate times.
[0060] Please see Figure 1 , Figure 2 and Figure 3 The present invention also provides a dust removal device, which includes a high-temperature dust collector according to any of the above embodiments, wherein the flue gas inlets of multiple high-temperature dust collectors are connected in parallel, the flue gas outlets of multiple high-temperature dust collectors are connected in parallel, and the dust removal air outlets of multiple high-temperature dust collectors are connected in parallel.
[0061] The flue gas to be dusted can enter multiple high-temperature dust collectors at the same time for dust removal, thereby improving dust removal efficiency.
[0062] The dust removal device also includes a support frame 8 and a dust conveying device 9. The housing 1 is mounted on the support frame 8, and the dust hoppers 12 of multiple high-temperature dust collectors convey the dust to the dust silo for collection through the dust conveying device 9.
[0063] Although the present invention has been described with reference to several typical embodiments, it should be understood that the terminology used is descriptive and exemplary, and not restrictive. Since the present invention can be embodied in many forms without departing from the spirit or essence of the invention, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims. Therefore, all variations and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.
Claims
1. A high temperature dust precipitator characterized by, The high-temperature dust collector comprises: a shell comprising a dust removal bin and a hopper connected below the dust removal bin; a filter bag assembly arranged in the dust removal bin, the filter bag assembly comprising at least one inner-filtering metal filter bag, and the bag opening of the inner-filtering metal filter bag facing the hopper; a rapping device for rapping the filter bag assembly; an inlet flue connected to a flue gas inlet of the shell, the flue gas inlet being communicated with the inside of the inner-filtering metal filter bag, and an inlet damper being arranged on the inlet flue; an outlet flue connected to a flue gas outlet of the shell, the flue gas outlet being communicated with the outside of the inner-filtering metal filter bag, and an outlet damper being arranged on the outlet flue; a dust cleaning air duct connected to a dust cleaning air port of the shell, the dust cleaning air duct being communicated with the outside of the inner-filtering metal filter bag, and a dust cleaning damper being arranged on the dust cleaning air duct, and the dust cleaning air duct being used for passing in dust cleaning air.
2. The high temperature dust precipitator of claim 1, wherein, The high-temperature dust collector further comprises a flower plate. The flower plate is arranged in the dust removal bin and connected to the side wall of the dust removal bin. The flower plate is provided with at least one flower plate hole. The inner-filtering metal filter bag is connected above the flower plate, and the inner-filtering metal filter bag corresponds to the flower plate hole one by one.
3. The high temperature dust precipitator of claim 2, wherein, The flower plate is connected to the bottom of the side wall of the dust removal bin.
4. The high temperature dust precipitator of claim 1, wherein, The axis of the inner-filtering metal filter bag is arranged vertically, and the bag opening of the inner-filtering metal filter bag faces downward.
5. The high temperature dust precipitator of claim 4, wherein, The dust cleaning air port is located at the top wall of the dust removal bin.
6. The high temperature dust precipitator of claim 5, wherein, The flue gas inlet is located at the side wall of the hopper or the upper part of the hopper to the lower part of the flower plate and below the inner-filtering metal filter bag. The flue gas outlet is located at the side wall of the dust removal bin and above the inner-filtering metal filter bag.
7. The high temperature dust cleaner of claim 1, wherein The high-temperature dust collector further comprises a differential pressure detector and a controller. The differential pressure detector is used for detecting the differential pressure of the filter bag in the dust removal bin. The controller controls the rapping device, the inlet damper, the outlet damper and the dust cleaning damper according to the differential pressure detected by the differential pressure detector.
8. The high temperature dust cleaner of claim 1, wherein, The filter bag assembly further comprises a hanging beam and a hanging connecting piece. The hanging beam is connected in the dust removal bin. The inner-filtering metal filter bag is hung on the hanging beam through the hanging connecting piece, and the hanging connecting piece is a rigid connecting piece or an elastic connecting piece. The rapping device makes the inner-filtering metal filter bag vibrate by rapping the hanging beam.
9. A dust extraction device characterised in that, The high-temperature dust collector comprises: a shell comprising a dust removal bin and a hopper connected below the dust removal bin; a filter bag assembly arranged in the dust removal bin, the filter bag assembly comprising at least one inner-filtering metal filter bag, and the bag opening of the inner-filtering metal filter bag facing the hopper; a rapping device for rapping the filter bag assembly; an inlet flue connected to a flue gas inlet of the shell, the flue gas inlet being communicated with the inside of the inner-filtering metal filter bag, and an inlet damper being arranged on the inlet flue; an outlet flue connected to a flue gas outlet of the shell, the flue gas outlet being communicated with the outside of the inner-filtering metal filter bag, and an outlet damper being arranged on the outlet flue; a dust cleaning air duct connected to a dust cleaning air port of the shell, the dust cleaning air duct being communicated with the outside of the inner-filtering metal filter bag, and a dust cleaning damper being arranged on the dust cleaning air duct, and the dust cleaning air duct being used for passing in dust cleaning air.