Pulse blowback structure for high-temperature rigid structure filter element
By introducing the air intake guide plate and the design of the lower ash guide plate in the high-temperature rigid filter element equipment, combined with the multiple backblowing air flow method, the problems of insufficient regeneration efficiency and poor dust settlement effect of the high-temperature rigid filter element equipment are solved, and efficient dust collection and regeneration are achieved.
Patent Information
- Application Number
- CN202421629868.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-11
- Publication Date
- 2025-08-12
- Estimated Expiration
- 2034-07-11
AI Technical Summary
The existing high-temperature rigid filter element equipment has insufficient regeneration efficiency and poor dust settlement effect, especially due to poor pulse vibration effect and poor high-concentration dust settlement caused by dust spoiling.
A structure including an intake guide plate and a lower ash guide plate in the chamber is designed to separate the ash bucket, the middle box and the upper box clean chamber. The uniformity of the backblowing pressure and the dust settlement effect are improved through multiple backblowing air flow methods to avoid air flow spoiling, and the regeneration effect is strengthened by using honeycomb ceramic three-dimensional film and multiple backblowing methods.
The regeneration efficiency and dust settlement effect of high-temperature rigid filter element equipment are improved, the filter element load is reduced, and efficient dust collection and regeneration is achieved.
Smart Images
Figure CN223209173U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of rigid filter element equipment for high-temperature dust removal, in particular to a pulse backflushing structure for a high-temperature rigid structure filter element. Background Art
[0002] Currently, the filter materials used in dust-laden low-, medium-, and high-temperature gas treatment methods primarily employ flexible low-temperature bags and rigid medium- and high-temperature filter elements such as honeycomb three-dimensional ceramic filter elements, cylindrical ceramic filter tubes, and metal filter screens. Due to their material properties, flexible bags possess a certain degree of elasticity and pliability, and are typically regenerated using an online, row-by-row pulse vibration method. However, high-temperature bags have a temperature resistance limit of approximately 200-300°C and cannot withstand higher temperatures. In environments exceeding the bag's temperature limit, they must be replaced with high-temperature-resistant, rigid-structured honeycomb three-dimensional ceramic filter elements, cylindrical ceramic filter tubes, and metal filter screens. However, rigid filter elements are fixed in structure, and their filter surfaces lack the elasticity of flexible materials. The currently commonly used pulse backflushing method, with its pulse vibration, has no shaking effect on rigid filter elements, resulting in poor regeneration and failing to meet the requirements for rapid and efficient regeneration of such filter elements and filter tubes. Traditional dust bag filter elements utilize online, row-by-row pulse vibration backflushing. However, ceramic fiber filter tubes and metal screens, due to their longer structures and clean chamber heights generally exceeding 3 meters, often employ both online and offline pulse vibration. Furthermore, due to the high housings and the lack of compartmentalization between chambers, dust released during backflushing can easily enter adjacent filter elements, resulting in repetitive and ineffective operation. We have designed a device structure for rigid filter elements, such as honeycomb ceramic three-dimensional dust filter elements, specifically a backflushing regeneration and dust collection mechanism. This solves the problems of insufficient regeneration of rigid filter elements in high-temperature flue gas dust removal and poor dust settling caused by gas turbulence in the dust collection mechanism, meeting the requirements for fast and efficient operation of such filter elements and filter tubes. Utility Model Content
[0003] The purpose of the utility model is to provide a pulse backflushing structure for a high-temperature rigid structure filter element to solve the problems raised in the above background technology.
[0004] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a pulse back-flushing structure for a high-temperature rigid structure filter element, comprising a body, a bracket fixed on the surface of the body, the interior of the body being divided into an ash hopper, a middle box body and an upper box body clean chamber, an ash unloading motor being fixed at the bottom of the ash hopper, an air intake guide plate being fixed on the inner wall of the ash hopper, a chamber lower ash guide plate being fixed on the inner wall of the upper box body clean chamber, the chamber lower ash guide plate being extended into the middle box body and the ash hopper, the upper box body clean chamber being connected to the air bag assembly through a back-flushing nozzle, a pulse valve being provided on the top of the air bag assembly, and the air intake guide plate being provided through the provided The air intake guide plate can play a role similar to that of an airflow guide wall. By setting the lower ash guide plate of the chamber, the ash hopper, the middle box and the upper box clean chamber can be separated to avoid the formation of turbulence in the downward high-concentration dust and dust-laden gas intake channel, which affects the sedimentation effect of the downward high-concentration dust. By setting the upper box clean chamber with a smaller height and volume, the overall chamber backwash pressure of the clean chamber is increased during backwashing, so that the backwash pressure of each filter element is evenly distributed, solving the problems of insufficient regeneration efficiency of high-temperature rigid filter element dust removal equipment and poor dust sedimentation effect caused by high-concentration dust blowing downward and intake gas turbulence in the dust collecting structure.
[0005] Preferably, a lifting valve assembly is provided on the top of the machine body, and the lifting valve assembly extends through the machine body to the clean chamber of the upper box body. When one of the lifting valve assemblies is closed, the corresponding chamber smoke exhaust valve plate is closed, and the clean chamber of the upper box body is in a negative pressure-free state.
[0006] Preferably, a basket is fixed inside the middle box, a honeycomb ceramic three-dimensional membrane is provided inside the basket, and a back-blowing hood is fixed on the top of the basket. The dust-laden gas entering the equipment passes downward through the air intake guide plate through the provided air intake guide plate. This process reduces the energy of the gas, and some small and light dust increases collision to form some larger dust. The dust that agglomerates and becomes heavier and larger during the collision loses kinetic energy, increases bending force, loses upward movement and directly falls into the ash hopper, avoiding the problem of superposition of high-concentration or low-specific-gravity blown-down dust and intake airflow turbulence, reducing the load on the filter element and the dust removal and collection effects.
[0007] Preferably, the back-blowing hood is positioned opposite to the back-blowing nozzle.
[0008] Preferably, the surface of the body is provided with a dust-containing gas intake channel, and the ash hopper is provided with a downward high-concentration dust sweeping and back-blowing. The downward high-concentration dust sweeping forms accumulations and agglomerations on the filtering surface of the honeycomb ceramic three-dimensional membrane, and naturally falls to the ash hopper under the blocking effect of the ash guide plate under the chamber and the action of gravity. During the process, because the lower mouth of the ash guide plate under the chamber is lower than the air intake guide plate, and the chamber is off-line for backblowing, the chamber has no intake air flow disturbance, which will not affect the descent of the downward high-concentration dust sweeping, and avoids the downward high-concentration dust sweeping and the intake air flow forming turbulence to drive the downward high-concentration dust sweeping into the honeycomb ceramic three-dimensional membrane of other chambers, forming secondary high-concentration dust, thereby improving the regeneration efficiency.
[0009] Preferably, the airflow ejected from the back-blowing nozzle includes high-pressure air back-blowing primary air, high-pressure air back-blowing secondary air, and high-pressure air chamber back-blowing tertiary air. When the pulse valve is opened, the compressed air is formed into high-pressure air back-blowing primary air through the back-blowing nozzle. Because the nozzle of the back-blowing nozzle is at a certain distance from the back-blowing hood, when the high-pressure air back-blowing primary air is downward, it drives the hot air under the back-blowing nozzle to form high-pressure air back-blowing secondary air. After the two gases are mixed, they enter the filter surface together to increase the back-blowing air volume. Increasing the back-blowing temperature reduces the cold and hot impact of the cold air on the honeycomb ceramic three-dimensional membrane. The back-blowing compressed air can instantly fill the entire space of the clean cavity of the upper box body to form high-pressure air chamber back-blowing tertiary air, and evenly apply the pressure of the entire cavity to each channel of the filter element in the cavity. The multiple regeneration back-blowing methods are superimposed to enhance the back-blowing regeneration effect.
[0010] Compared with the prior art, the present invention provides a pulse backflushing structure for high-temperature rigid filter elements, which has the following beneficial effects:
[0011] 1. The pulse backflushing structure of the high-temperature rigid structure filter element can play a role similar to the airflow guide wall through the air intake guide plate. The lower ash guide plate of the chamber can separate the ash hopper, the middle box and the upper box clean chamber to avoid the formation of turbulence in the downward high-concentration dust and dust-laden gas intake channel, which affects the sedimentation effect of the downward high-concentration dust. By setting the upper box clean chamber with a smaller height and volume, the overall chamber backflushing pressure of the clean chamber is increased during backflushing, so that the backflushing pressure of each filter element is evenly distributed, solving the problems of insufficient regeneration efficiency of the high-temperature rigid filter element dust removal equipment and poor dust sedimentation effect caused by high-concentration dust blowing downward and intake gas turbulence in the dust collecting structure.
[0012] 2. The pulse backflush structure of the high-temperature rigid structure filter element allows the dust-laden gas entering the equipment to pass downward through the air intake guide plate through the provided air intake guide plate. This process reduces the gas energy, and some small and light dust particles increase collisions to form some larger dust particles. The dust particles that agglomerate and become heavier and larger in the collision process lose kinetic energy, increase bending force, lose upward motion and fall directly into the ash hopper, avoiding the problem of superposition of high-concentration or light-specific-gravity blown-down dust and intake airflow turbulence, thereby reducing the load on the filter element and the dust removal and collection effects. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 This is a schematic diagram of the cross-section structure of the utility model;
[0014] Figure 2 This is a schematic diagram of the cross-sectional side view of the structure of the utility model;
[0015] Figure 3 This is a schematic diagram of the backflushing, regeneration and dust collection structure of the high-temperature dust removal and filtration equipment of this utility model.
[0016] In the figure: 1. Bracket; 2. Ash unloading motor; 3. Air intake guide plate; 4. Ash hopper; 5. Middle box; 6. Clean chamber of upper box; 7. Air bag assembly; 8. Pulse valve; 9. Ash guide plate under chamber; 10. Lift valve assembly; 11. Backflush nozzle; 12. Backflush hood; 13. Basket; 14. Honeycomb ceramic three-dimensional membrane; 15.1. High-pressure air backflush primary air; 15.2. High-pressure air backflush secondary air; 15.3. High-pressure air chamber backflush tertiary air; 16. Schematic diagram of dust-laden gas intake channel; 17. Downward high-concentration dust. DETAILED DESCRIPTION
[0017] like Figure 1-Figure 3As shown, the utility model provides a technical solution: a pulse back-flushing structure for a high-temperature rigid structure filter element, comprising a body, a bracket 1 fixed on the surface of the body, the interior of the body being divided into an ash hopper 4, a middle box 5 and an upper box clean chamber 6, an ash unloading motor 2 being fixed at the bottom of the ash hopper 4, an air intake guide plate 3 being fixed on the inner wall of the ash hopper 4, a chamber lower ash guide plate 9 being fixed on the inner wall of the upper box clean chamber 6, the chamber lower ash guide plate 9 extending into the middle box 5 and the ash hopper 4, the upper box clean chamber 6 being connected to the air bag assembly 7 through a back-flushing nozzle 11, a pulse valve 8 being provided on the top of the air bag assembly 7, It can play a role similar to that of an airflow guide wall. By setting the lower ash guide plate 9 of the chamber, the ash hopper 4, the middle box 5 and the upper box clean chamber 6 can be separated to avoid the formation of turbulence in the downward high-concentration dust 17 and the dust-laden gas intake channel 16, which affects the sedimentation effect of the downward high-concentration dust 17. By setting the upper box clean chamber 6 with a smaller height and volume, the overall chamber backflushing pressure of the clean chamber 6 is increased during backflushing, so that the backflushing pressure of each filter element is evenly distributed, thereby solving the problems of insufficient regeneration efficiency of high-temperature rigid filter element dust removal equipment and poor dust sedimentation effect caused by high-concentration downward dust blowing of the dust collecting structure and turbulence of the intake gas.
[0018] A lifting valve assembly 10 is provided on the top of the machine body, and the lifting valve assembly 10 extends through the machine body to the clean chamber 6 of the upper box body. The airflow ejected by the back-blowing nozzle 11 includes high-pressure air back-blowing primary air 15.1, high-pressure air back-blowing secondary air 15.2, and high-pressure air chamber back-blowing tertiary air 15.3. The pressure difference before and after the filter element is tested by the pressure sensor or offline back-blowing regeneration is performed regularly. When one of the lifting valve assemblies 10 is closed, the corresponding chamber exhaust valve plate is closed, and the clean chamber 6 of the upper box body is in a non-negative pressure state. The pulse valve 8 is opened to convert the compressed air into high-pressure air back-blowing primary air 15.1 through the back-blowing nozzle 11. The nozzle of 11 is at a certain distance from the back-blowing cover 12. When the high-pressure air back-blowing primary air 15.1 is downward, it drives the hot air under the back-blowing nozzle 11 to form high-pressure air back-blowing secondary air 15.2. The two gases are mixed and enter the filter surface together to increase the back-blowing air volume. Increasing the back-blowing temperature reduces the cold and hot impact of the cold air on the honeycomb ceramic three-dimensional membrane 14. The back-blowing compressed air can instantly fill the entire space of the upper box clean cavity 6 to form a high-pressure air chamber back-blowing tertiary air 15.3, which evenly applies the pressure of the entire cavity to each channel of the filter element in the cavity. The multiple regeneration back-blowing methods are superimposed to enhance the back-blowing regeneration effect.
[0019] A basket 13 is fixed inside the middle box 5, and a honeycomb ceramic three-dimensional membrane 14 is provided inside the basket 13. A back-blowing hood 12 is fixed on the top of the basket 13. The dust-laden gas entering the equipment passes downward through the air intake guide plate 3 through the provided air intake guide plate 3. This process reduces the energy of the gas, and some small and light dust increases the collision to form some larger dust. The dust that agglomerates and becomes heavier and larger in the collision process loses kinetic energy, increases bending force, loses upward movement and directly falls into the ash hopper 4, avoiding the problem of superposition of high-concentration or low-specific-gravity purged dust and intake airflow turbulence, reducing the load on the filter element and the dust removal and collection effect.
[0020] The position of the back-blowing hood 12 is opposite to the position of the back-blowing nozzle 11. The surface of the machine body is provided with a dust-containing gas intake schematic channel 16. The ash hopper 4 is provided with a downward high-concentration dust 17. The back-blown downward high-concentration dust 17 forms a pile agglomeration on the filtering surface of the honeycomb ceramic three-dimensional membrane 14, and naturally falls into the ash hopper 4 under the blocking effect of the ash guide plate 9 under the chamber and the action of gravity. During the process, because the lower mouth of the ash guide plate 9 under the chamber is lower than the air intake guide plate 3, and the chamber is offline for back-blowing, the chamber has no intake air flow disturbance, which will not affect the descent of the downward high-concentration dust 17, avoiding the formation of turbulence between the downward high-concentration dust 17 and the intake air flow, driving the downward high-concentration dust 17 into the honeycomb ceramic three-dimensional membrane 14 of other chambers, forming secondary high-concentration dust, thereby improving the regeneration efficiency.
[0021] Based on the above embodiment, the air intake guide plate 3 is set so that the dust-laden gas entering the equipment passes downward through the air intake guide plate 3. This process reduces the energy of the gas, and some small and light dust particles increase collisions to form some larger dust particles. The dust particles that agglomerate and become heavier and larger during the collision lose kinetic energy, increase bending force, lose upward movement, and fall directly into the ash hopper 4, avoiding the problem of superposition of high-concentration or low-specific-gravity purged downward dust and intake airflow turbulence, thereby reducing the load on the filter element and the dust removal and collection effects.
[0022] Close one of the lifting valve assemblies 10, and the corresponding chamber smoke exhaust valve plate is closed. The upper box clean chamber 6 is in a non-negative pressure state. The pulse valve 8 is opened to convert the compressed air into high-pressure air backblowing primary air 15.1 through the backblowing nozzle 11. Because the nozzle of the backblowing nozzle 11 is a certain distance away from the backblowing cover 12, when the high-pressure air backblowing primary air 15.1 is downward, it drives the hot air below the backblowing nozzle 11 to form high-pressure air backblowing secondary air 15.2. After the two gases are mixed, they enter the filter surface together to increase the backblowing air volume. Increasing the backblowing temperature reduces the cold and hot impact of the cold air on the honeycomb ceramic three-dimensional membrane 14. The backblowing compressed air can instantly fill the entire space of the upper box clean chamber 6 to form high-pressure air chamber backblowing tertiary air 15.3, and evenly apply the pressure of the entire chamber to each channel of the filter element in the chamber. The multiple regeneration backblowing methods are superimposed to enhance the backblowing regeneration effect.
[0023] The back-blown downward high-concentration dust 17 forms a mass agglomeration on the filtering surface of the honeycomb ceramic three-dimensional membrane 14, and naturally falls into the ash hopper 4 under the blocking effect of the ash guide plate 9 under the chamber and the action of gravity. During the process, because the lower mouth of the ash guide plate 9 under the chamber is lower than the air inlet guide plate 3, and the chamber is back-blown offline, there is no intake air flow disturbance in the chamber, which will not affect the descent of the downward high-concentration dust 17, and avoids the formation of turbulence between the downward high-concentration dust 17 and the intake air flow, driving the downward high-concentration dust 17 into the honeycomb ceramic three-dimensional membrane 14 of other chambers, forming secondary high-concentration dust, thereby improving the regeneration efficiency.
[0024] The above generally describes the present invention in detail. However, it is obvious to those skilled in the art that modifications or improvements may be made to the present invention. Therefore, modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.
Claims
1. A pulse backflushing structure for a high-temperature rigid filter element, comprising a body, a bracket (1) being fixed on the surface of the body, characterized in that: The interior of the machine body is divided into an ash hopper (4), a middle box body (5) and an upper box body clean chamber (6); an ash unloading motor (2) is fixed to the bottom of the ash hopper (4); an air inlet guide plate (3) is fixed to the inner wall of the ash hopper (4); a chamber lower ash guide plate (9) is fixed to the inner wall of the upper box body clean chamber (6); the chamber lower ash guide plate (9) extends into the middle box body (5) and the ash hopper (4); the upper box body clean chamber (6) is connected to the air bag assembly (7) through a backflush nozzle (11); and a pulse valve (8) is provided on the top of the air bag assembly (7).
2. The pulse backflushing structure for a high-temperature rigid filter element according to claim 1, characterized in that: A lift valve assembly (10) is provided on the top of the machine body, and the lift valve assembly (10) extends through the machine body into the clean chamber (6) of the upper box body, and tests the pressure difference before and after the filter element through a pressure sensor or performs offline backwash regeneration at regular intervals.
3. The pulse backflushing structure for a high-temperature rigid filter element according to claim 1, characterized in that: A basket (13) is fixed inside the middle box (5), a honeycomb ceramic three-dimensional membrane (14) is provided inside the basket (13), and a back-blowing cover (12) is fixed on the top of the basket (13).
4. The pulse backflushing structure for a high-temperature rigid filter element according to claim 3, characterized in that: The position of the back-blowing cover (12) is opposite to the position of the back-blowing nozzle (11).
5. The pulse backflushing structure for a high-temperature rigid filter element according to claim 1, characterized in that: The surface of the machine body is provided with a dust-containing gas inlet schematic channel (16), and the ash hopper (4) is provided with a downward blowing high-concentration dust (17).
6. The pulse backflushing structure for a high-temperature rigid filter element according to claim 1, characterized in that: The airflow ejected from the back-blowing nozzle (11) includes high-pressure air back-blowing primary air (15.1), high-pressure air back-blowing secondary air (15.2), and high-pressure air chamber back-blowing tertiary air (15.3).