Low-carbon large industrial kiln flue gas bag type dust collector
Through the large-channel box structure and the design of the horn air inlet duct, combined with the airflow distribution plate and the enhanced ash cleaning device, the problems of filter bag wear and high energy consumption in the treatment of high temperature and high concentration flue gas in traditional bag dust collectors are solved, achieving low-carbon and efficient dust removal effect.
Patent Information
- Application Number
- CN202422424962.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-08
- Publication Date
- 2025-08-12
- Estimated Expiration
- 2034-10-08
AI Technical Summary
When traditional bag dust collectors deal with high temperature and high concentration industrial kiln flue gas, they have problems such as severe wear of filter bags, high operating energy consumption, and difficulty in maintenance. Especially when the flue gas volume is not effectively uniformized, resulting in frequent wear and high operating resistance.
It adopts a large-channel box structure and horn air inlet duct, combined with a combined airflow distribution plate and filter bag assembly, realizes uniform pretreatment of flue gas and large circulation filtration, is equipped with large-size filter bags and enhanced ash cleaning device, and optimizes the air clean chamber design to reduce resistance and improve ash cleaning efficiency.
It has achieved low-carbon operation, reduced equipment energy consumption by 30-50%, reduced failure rate by 80%, saved 20% of the area, facilitated maintenance and improved environmental conditions.
Smart Images
Figure CN223209180U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to large-scale industrial fume bag type dust removal and filtering equipment, in particular to a low-carbon large-scale industrial kiln fume bag type dust collector. Background Art
[0002] The flue gas from industrial kilns is high-temperature smelting flue gas with high smoke dust concentration. The smoke dust particle size distribution is mostly in the micron level. The smelting temperature is high, the smoke dust is finer, and even contains aerosols.
[0003] The bag filter can effectively control the emission of fine dust particles, but the dust attached to the surface of the filter bag forms a dense dust layer that is difficult to peel off and remove, resulting in high operating resistance of the filter bag and increased fan energy consumption.
[0004] In addition, when a large amount of flue gas enters the bag filter box, the most unfavorable factor is that the flue gas that has not been homogenized contains high dynamic pressure or local high dynamic pressure, which will cause wear and leakage of the filter bag after entering the bag bundle area.
[0005] Traditional bag dust collectors are modularized small single-chamber bag dust collectors designed to handle large flue gas volumes. This technology ignores the physical properties of filtered flue gas and fails to establish the necessary uniform flow field, resulting in the inlet flue gas not receiving the necessary flue gas pretreatment (directional and quantitative diversion and guidance of flue gas). Turbulent flue gas entering the bag bundle area frequently wears out the filter bags. Therefore, traditional bag dust collectors are equipped with "stop valves" at the air outlets of each single chamber, allowing for online maintenance and bag replacement at any time. Frequent operation of the "stop valve" makes the valve plate easy to fall off, while also increasing the structural operating resistance (increasing operating energy consumption); in addition, it is very difficult to find broken bags and replace filter bags inside the box, resulting in a large maintenance workload and a harsh environment.
[0006] In summary, in order to solve the above problems, it is particularly important to design a low-carbon large-scale industrial kiln flue gas bag dust collector. Summary of the Invention
[0007] To address the above-mentioned issues, this utility model designs a low-carbon, large-scale industrial furnace flue gas bag filter. It adopts a large-channel box structure and an operating mechanism that "organizes" the inlet flue gas before filtering it. The flue gas organization method: establishes fixed devices with different functions within a certain "time and space", quantifies and guides the flue gas for large-circulation, low-speed filtration operation, expands the secondary airflow for bag cleaning, adopts large-sized filter bags, strengthens the intelligent control of dust collector operation, and upgrades the management level. It achieves energy-saving operation when processing large flue gas volumes, reduces operating energy consumption by 30-50%, saves 20% of floor space, reduces failure rate by 80%, significantly reduces maintenance workload, facilitates maintenance and repair, and improves the maintenance environment.
[0008] The smoke filter is a bag type dust collector as claimed in claim 1, wherein the bag comprises a plurality of filter bags, wherein the bag is provided with a filter bag which is provided with a filter bag and a filter bag which is provided with a filter bag.
[0009] Further: the filter bag assembly is composed of a filter bag cage and a filter bag. The filter bag cage is fixed on the top wall of the middle box above the large channel and its upper end extends into the clean air chamber. The filter bag is mounted on the outside of the filter bag cage.
[0010] Furthermore: a flue gas flow dispersion plate is provided inside the trumpet air inlet pipe, and the outer walls of the flue gas flow dispersion plate are attached to the inner walls of the trumpet air inlet pipe. The flue gas flow dispersion plate and the combined air flow distribution plate and guide plate constitute a special flue gas pretreatment mechanism for the bag filter.
[0011] Furthermore: a number of maintenance and bag-changing movable doors are evenly arranged from left to right on the top of the clean air chamber. The maintenance and bag-changing movable doors are sealed and connected to the top of the clean air chamber through a clamping device, and inspection manhole doors are connected on the left and right sides of the clean air chamber by bolts.
[0012] Furthermore: a filter bag pulse cleaning device is also horizontally arranged in the clean air chamber, the upper end of the filter bag assembly is located directly below the cleaning port of the filter bag pulse cleaning device, and the left end of the filter bag pulse cleaning device extends to the outside of the clean air chamber.
[0013] Furthermore: a plurality of support columns are provided at the bottom around the middle box body to prevent the ash hopper from falling.
[0014] After adopting the above structure, the beneficial effects of the utility model are as follows:
[0015] 1. The dust collector utilizes a large housing structure, creating a flue gas pre-treatment buffer zone, guiding the flue gas through a large circulation filtration process within the housing, achieving low-resistance operation. The resistance of the dust collector is the sum of the structural resistance generated by the flue gas flowing within the housing and the filter bag operating resistance caused by dust adhering to the filter bags. The structural resistance of the flue gas is generated during operation within the housing and is essentially a fixed value. Innovative methods for reducing structural resistance include guiding the flue gas to flow in parallel and at a reduced speed within the large channel structure, avoiding uneven high-speed flow and large-radius deflection. This measure can reduce structural resistance by 200-300 Pa, resulting in 15% energy savings. Innovative methods for reducing dust layer resistance within the filter bags include enhanced bag cleaning, providing ample secondary airflow for cleaning, guiding the flue gas to flow in parallel and enter the bag filter area in an upward-flowing manner, and utilizing large-diameter and long filter bags, which can effectively reduce dust layer resistance by 300-1000 Pa, saving 20-40% energy.
[0016] 2. The inlet of the bag dust collector adopts a trumpet air inlet pipe, and the small end of the trumpet pipe is docked with the inlet of the flue gas duct; the large end of the trumpet pipe is docked with the port of the dust collector filter chamber (middle box) and a porous air flow distribution plate is installed inside the trumpet pipe. When the flue gas passes through the air flow distribution plate, it completes mechanical impact and sufficient diffusion; in the filter chamber, the flue gas is then guided into the rear bag bundle area in an intervention-quantified manner for uniform filtration to prevent the flue gas from wearing the filter bag.
[0017] 3. The clean air chamber adopts a large corridor-style structure, serving as a multifunctional room: it integrates the clean air collection chamber, clean air exhaust channel, and filter bag inspection access. The top of the clean air chamber is equipped with multiple movable inspection and bag replacement doors, sealed with a clamping device. Inspection manhole doors are installed on the sides, sealed with bolts, allowing easy access to the chamber to check for leaking bags. The provision of two manhole doors with different functions prevents air leakage caused by frequent opening of the bag replacement manhole door. These measures effectively reduce the operating resistance of the equipment.
[0018] 4. The clean air chamber adopts a large box structure, which breaks through the traditional modular small structure box, provides sufficient secondary cleaning airflow for pulse cleaning, strengthens the cleaning effect, and meets the cleaning intensity of the filter bag. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.
[0020] Figure 1 It is a structural diagram of the present utility model.
[0021] Figure 2 This is an assembly diagram of the present utility model. DETAILED DESCRIPTION
[0022] like Figure 1 and Figure 2The shown low-carbon large-scale industrial kiln flue gas bag dust collector includes a middle box body 3, a trumpet air inlet pipe 1, a clean air chamber 5, a filter bag assembly 10 and an ash hopper 11. A large channel for filtering is opened inside the middle box body. The trumpet air inlet pipe serves as the flue gas inlet of the dust collector, and its small mouth end is docked and installed with the flue gas duct inlet. The large mouth end of the trumpet air inlet pipe is installed on the outer wall of the middle box body and faces the large channel inside the middle box body. The connection end with the trumpet air inlet pipe is the front end of the middle box body. A combined air flow distribution plate guide plate 4 is installed in the front end area of the large channel in the middle box body. The large channel for filtering is connected to the trumpet air inlet pipe through the combined air flow distribution plate guide plate. The filter bag assembly is arranged in the large channel for filtering. The clean air chamber is fixed on the top of the middle box body and is connected to the middle box body through the filter bag assembly. Several ash hoppers are evenly arranged on the bottom of the middle box body, and the upper end of the ash hopper is connected to the large channel for filtering. The dust collector utilizes a large housing structure, creating a flue gas pre-treatment buffer zone, guiding the flue gas through a large circulation filtration process within the housing, achieving low-resistance operation. The resistance of the dust collector is the sum of the structural resistance generated by the flue gas flowing through the housing and the bag resistance caused by dust adhering to the filter bags. The structural resistance of the flue gas is generated during operation within the housing and is essentially a fixed value. Innovative methods for reducing structural resistance include guiding the flue gas to flow in parallel and at a reduced speed within the large channel structure, avoiding uneven high-speed flow and large-radius deflection. This measure can reduce structural resistance by 200-300 Pa, resulting in 15% energy savings. Innovative methods for reducing dust layer resistance within the filter bags include enhanced bag cleaning, providing ample secondary airflow for cleaning, guiding the flue gas to flow in parallel and enter the bag filter area in an upward-flowing manner, and utilizing large-diameter and long filter bags, which can effectively reduce dust layer resistance by 300-1000 Pa, saving 20-40% energy.
[0023] The above-mentioned filter bag assembly is composed of a filter bag cage and a filter bag. The filter bag cage is fixed on the top wall of the middle box above the large channel and its upper end extends into the clean air chamber. The filter bag is set on the outside of the filter bag cage.
[0024] like Figure 1The trumpet air inlet pipe shown is internally provided with a flue gas flow dispersion plate 2. The outer walls of the flue gas flow dispersion plate are attached to the inner walls of the trumpet air inlet pipe. The flue gas flow dispersion plate and the combined air flow distribution plate and guide plate constitute a dedicated flue gas pretreatment mechanism for the bag filter. The uniform flue gas filtration for the filter bags installed in the rear area has become an essential process means for bag filtration technology. The bag filter inlet adopts a trumpet air inlet pipe. The small end of the trumpet pipe is docked and installed with the inlet of the flue gas duct; the large end of the trumpet pipe is docked and installed with the port of the dust collector filter chamber (middle box). A porous air flow distribution plate is installed inside the trumpet pipe. When the flue gas passes through the air flow distribution plate, it completes mechanical impact and sufficient diffusion; in the filter chamber, the flue gas is then guided into the rear bag bundle area in an intervention-type quantitative manner for uniform filtration to prevent the flue gas from abrading the filter bags.
[0025] like Figure 1 The top of the clean air chamber shown is evenly arranged from left to right with several movable doors for inspection and bag replacement. The movable doors are sealed to the top of the clean air chamber by a clamping device, and inspection manhole doors are bolted to the left and right sides of the clean air chamber. The clean air chamber adopts a large corridor structure as a multifunctional room: it integrates the clean air collection chamber, the clean air exhaust channel, and the filter bag inspection channel into one. The top of the clean air chamber is equipped with multiple movable doors for inspection and bag replacement, which are sealed with a clamping device; the side is equipped with an inspection manhole door, which is bolted and sealed to facilitate entry into the box to check for leaking bags. Two manhole doors with different functions are provided to avoid air leakage caused by frequent opening of the bag replacement manhole door. The above measures can effectively reduce the structural resistance of the equipment operation.
[0026] like Figure 1 and Figure 2 The clean air chamber shown here also features a horizontally mounted pulse bag cleaning system, with the upper end of the filter bag assembly positioned directly below the cleaning port. The clean air chamber utilizes a large housing, a breakthrough from the traditional modular, small housing. This provides ample secondary airflow for pulse cleaning, enhancing the cleaning effect and ensuring the required cleaning intensity for the filter bags.
[0027] like Figure 1 As shown, a plurality of support columns 12 are provided at the bottom of the box body to prevent the ash hopper from falling. By adopting the above structure, the ash hopper is prevented from falling suddenly, thereby reducing unnecessary losses.
[0028] The above are only preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be pointed out that for those skilled in the art, various improvements and modifications that do not depart from the principles of the present invention should be considered within the scope of protection of the present invention.
Claims
1. A low-carbon large-scale industrial kiln flue gas bag dust collector, characterized by: The utility model comprises a middle box body (3), a trumpet air inlet pipe (1), a clean air chamber (5), a filter bag assembly (10) and an ash hopper (11), wherein a large channel for filtering is provided inside the middle box body, the trumpet air inlet pipe serves as the smoke inlet of the dust collector, and its small end is docked with the smoke pipe inlet, the large end of the trumpet air inlet pipe is installed on the outer wall of the middle box body and faces the large channel inside the middle box body, and the connection end with the trumpet air inlet pipe is the front end of the middle box body, a combined air flow distribution plate guide plate (4) is installed in the front end area of the large channel in the middle box body, the large channel for filtering is connected to the trumpet air inlet pipe through the combined air flow distribution plate guide plate, the filter bag assembly is arranged in the large channel for filtering, the clean air chamber is fixed on the top of the middle box body and is connected to the middle box body through the filter bag assembly, a plurality of ash hoppers are evenly arranged on the bottom of the middle box body, and the upper ends of the ash hoppers are connected to the large channel for filtering.
2. A low-carbon large-scale industrial furnace flue gas bag dust collector according to claim 1, characterized in that: The filter bag assembly (10) is composed of a filter bag cage and a filter bag. The filter bag cage is fixed on the top wall of the middle box above the large channel and its upper end extends into the clean air chamber. The filter bag is sheathed on the outside of the filter bag cage.
3. The low-carbon large-scale industrial furnace flue gas bag dust collector according to claim 1 is characterized by: A smoke flow dispersion plate (2) is provided inside the trumpet air inlet pipe, and the outer walls of the smoke flow dispersion plate are attached to the inner walls of the trumpet air inlet pipe. The smoke flow dispersion plate and the combined air flow distribution plate guide plate.
4. The low-carbon large-scale industrial furnace flue gas bag filter according to claim 1 is characterized by: Several inspection and bag-changing movable doors are evenly arranged on the top of the clean air chamber from left to right. The inspection and bag-changing movable doors are sealed and connected to the top of the clean air chamber through a clamping device. Inspection manhole doors are connected on the left and right sides of the clean air chamber by bolts.
5. The low-carbon large-scale industrial furnace flue gas bag filter according to claim 1 is characterized by: A filter bag pulse cleaning device is also horizontally arranged in the clean air chamber. The upper end of the filter bag assembly is located directly below the cleaning port of the filter bag pulse cleaning device, and the left end of the filter bag pulse cleaning device extends to the outside of the clean air chamber.
6. The low-carbon large-scale industrial furnace flue gas bag filter according to claim 1 is characterized by: A plurality of support columns (12) for preventing the ash hopper from falling are also provided at the bottom around the middle box body.