Modularized dust remover for removing dust through acoustic wave-assisted pulse injection

Abstract

The invention relates to a modular dust remover for removing dust through sound wave assisted pulse jetting, which comprises an air inlet pipe, filter unit modules, a dust hopper and an air outlet pipe, each filter unit module is composed of an upper box body and an outer filter folding type filter element, four filter unit modules are placed above the dust hopper, the air inlet pipe is vertically placed in the center of the four filter unit modules, and the air outlet pipe is connected with the air inlet pipe. The air outlet pipe is installed on the side portion of the upper box body. Compared with the prior art, the four filter unit modules are arranged, pulse blowing and sound wave ash removal are combined, and the high efficiency of the ash removal system is guaranteed; the external filter folding type filter paper is used for replacing a traditional filter bag, overall operation of equipment is not affected even if a single piece of filter paper is damaged, the stability of an ash removal system is guaranteed, and good engineering practical value is achieved.

Description

Technical Field

[0001] The invention relates to dust removal equipment in the field of industrial environmental protection, and in particular to a modular dust collector for sonic-assisted pulse jet cleaning. Background Art

[0002] With the rapid development of my country's economy, my country's industrial level is also constantly improving. Various auxiliary equipment will be used in dust removal, and the most frequently used of these auxiliary equipment is the bag dust removal device. Among them, bag dust collectors are widely used due to their simple working principle, small impact of dust, and high capture efficiency. Existing bag dust collectors generally include ash hoppers, boxes, filter bags, air inlets, air outlets, and pulse jet devices. Their working principle is to use compressed air through nozzles to clean the filter bags. In engineering practice, it is found that condensation and compaction often occur on the filter bags. Therefore, ultrasonic cleaning is often used as an auxiliary device to loosen the agglomerated dust to achieve the purpose of removing the dust layer of the filter bags.

[0003] The core of bag dust collector is the filter bag. However, there are still many problems in the use of bag dust collector. Due to mechanical wear, chemical action, long-term flue gas scouring and other reasons, the filter bag is easily damaged and the service life of the filter bag is short. Moreover, the treatment measure for bag damage in traditional bag dust collector is to shut down the entire equipment for inspection and replacement of filter bags, which affects the stability of the entire dust removal equipment and has high operation and maintenance costs. Chinese patent CN111939710A discloses a top vertical air inlet electric bag composite dust collector, which combines the advantages of electric dust collector and bag dust collector. The device adds a charging device in the air inlet channel of the bag dust collector, and the blowing device, upper box and flower plate are regularized into standard 4 unit modules, and the airflow is evenly distributed. However, the device has a complex structure and a large volume, which will increase the equipment operation cost and maintenance cost.

[0004] In view of this, in response to the above-mentioned technical problems, it is necessary to design a new modular dust collector to provide certain help and support for the optimization and development of the dust collector. Summary of the invention

[0005] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and provide a modular dust collector with sound wave assisted pulse jet cleaning, so as to improve the stability of the dust removal equipment and reduce the operation and maintenance costs of the equipment.

[0006] During the process of conception, the applicant believed that the present invention improves the filter box of the traditional bag dust collector, sets up 4 filter unit modules, combines pulse blowing and ultrasonic cleaning, uses external filter pleated filter paper to replace traditional filter bags, and achieves the goal of causing a single filter paper to be damaged without affecting the overall operation of the equipment, and has good engineering practical value.

[0007] The purpose of the present invention can be achieved by the following technical solutions:

[0008] A modular dust collector for sonic-assisted pulse jet cleaning, comprising an air inlet pipe, a filter unit module, an ash hopper, and an air outlet pipe;

[0009] The filter unit module is composed of an upper box body and an outer filter folded filter element. There are four filter unit modules in total, and the four filter unit modules are integrally arranged above the ash hopper;

[0010] The air inlet pipe is vertically placed in the center of the four filter unit modules, and the air outlet pipe is installed on the side of the upper box body;

[0011] The dust-laden gas enters the dust collector from the air inlet duct, is evenly dispersed through the four filter unit modules, and then is cleaned by the sound-assisted pulse jet device. The clean gas is discharged from the air outlet duct.

[0012] Furthermore, the four filter unit modules are arranged in a windmill shape.

[0013] Furthermore, each set of upper boxes includes a set of pulse jet devices and a plurality of sound wave sounding diaphragms.

[0014] Furthermore, the pulse spraying device includes an air bag, a main control electromagnetic pulse valve, an electromagnetic valve, a pulse branch pipe, a pulse main pipe, and a spraying pipe;

[0015] A main control electromagnetic pulse valve is installed on the pulse main pipe, the main control electromagnetic pulse valve is connected to the air bag, the main control electromagnetic pulse valve and the air bag are located outside the upper box body, and are used to simultaneously control the air intake of the pulse main pipe and the pulse branch pipe;

[0016] A solenoid valve is installed on the pulse branch pipe, and the solenoid valve is located outside the upper box body and is used to independently control the air intake of the pulse branch pipe;

[0017] A plurality of blowing pipes are led out from the pulse main pipe and the pulse branch pipe, and the pipe mouth of a blowing pipe blows the upper filter port of an external filter folded filter element. The blowing pipe comprises an inner pipe, an outer pipe, and a blowing pipe chassis. The outer pipe is inserted into the lower half of the inner pipe, and the blowing pipe chassis is arranged between the outer wall of the inner pipe and the inner wall of the outer pipe.

[0018] Furthermore, the sound wave sounding diaphragm is installed on the blowing pipe chassis.

[0019] Further preferably, the distance between the blow pipe chassis and the upper filter port of the external filter folded filter element is 150 to 300 mm.

[0020] Furthermore, the outer filter folded filter element comprises an outer filter folded filter paper and filter ports at the upper and lower ends thereof and support plates at both sides, and the outer filter folded filter elements are arranged equidistantly.

[0021] Further preferably, the outer filter folded filter paper is a plastic-fired plate, the material of the plastic-fired plate is polyethylene, and the surface of the plastic-fired plate is coated with a polytetrafluoroethylene resin film, which can effectively prevent dust from sticking; the fold depth of the outer filter folded filter paper is 20 to 30 mm, and the fold height of the outer filter folded filter paper is 30 to 40 mm.

[0022] Furthermore, a sound-absorbing layer is provided on the filter unit module.

[0023] Furthermore, the air inlet pipe and the ash hopper are on the same center line.

[0024] Furthermore, the dust collector processes air volume of 8-12w m 3 / h.

[0025] Furthermore, the pulse spray device is electrically connected to the PLC control system, and the PLC control system can control the switching of the main electromagnetic pulse valve and the electromagnetic valve. A sensor is installed inside the dust collector to detect the processing air volume and resistance of the dust collector, and then transmit the electrical signal to the PLC control system.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] (1) The present invention is provided with four filter unit modules, and uses external filter folded filter paper to replace the traditional filter bag. Once the filter paper is damaged, it is only necessary to locate the unit where it is located, which will not affect the operation of the overall dust removal system. Therefore, the stability of the dust collector is ensured and the service life of the dust collector is extended.

[0028] (2) The structure of the present invention is simple and compact. The four filter unit modules are distributed in a windmill shape around the air inlet pipe. The gas flow distribution of each filter unit is relatively uniform. By improving the air flow distribution, the problems of uneven smoke distribution and filter bag wear in the traditional pulse bag dust collector are improved.

[0029] (3) The present invention combines a pulse jet device with an acoustic wave dust cleaning device to effectively reduce energy consumption and improve dust cleaning efficiency. The pulse jet device is easy to operate and maintain, can quickly process a large amount of dust-containing gas, and has low operating energy consumption; the acoustic wave dust cleaning device can remove dust in all directions, effectively affecting the edges and corners of the filter paper, and can loosen the agglomerated dust, so that the agglomerated dust on the surface of the filter paper can fall off easily. The two devices are used alternately or in combination to ensure the high efficiency of the dust cleaning system.

[0030] (4) The outer filter folded filter paper used in the present invention is a plastic-burned plate. The wavy structure of the plastic-burned plate increases the filtration area and makes the dust collector compact. The plastic-burned plate has a rigid structure and a smooth surface, has good dust removability, can operate at low resistance, and has high filtration accuracy, which can effectively increase the efficiency of capturing fine dust. The polytetrafluoroethylene resin film coated on the surface of the plastic-burned plate provides excellent chemical resistance, antistatic, wear resistance and regeneration. The plastic-burned plate is easy to disassemble and assemble, has a low production cost, and extends the service life of the dust collector. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a front view of a modular dust collector in Example 1 of the present invention;

[0032] Figure 2 This is a structural diagram of four filter unit modules of a modular dust collector in Example 1 of the present invention;

[0033] Figure 3 Schematic cross-sectional view of the spray pipe of the pulse spray device in Example 1 of the present invention;

[0034] Figure 4 This is a schematic diagram of the placement of the sound wave sounding diaphragm in Example 1 of the present invention;

[0035] Figure 5 It is a schematic diagram of the structure of the external filter folded filter element in Example 1 of the present invention.

[0036] The names corresponding to the figure marks in the accompanying drawings are: 1-air inlet pipe, 2-air bag, 3-main control electromagnetic pulse valve, 4-solenoid valve, 5-inner pipe, 6-pulse branch pipe, 7-outer pipe, 8-pulse main pipe, 9-upper box, 10-blowing pipe chassis, 11-silencing layer, 12-filter unit module, 13-external filter folded filter element, 14-ash hopper, 15-air outlet pipe, 16-sonic wave sounding diaphragm, 17-external filter folded filter paper. DETAILED DESCRIPTION

[0037] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. The following embodiments are implemented based on the above technical solution of the present invention, and provide detailed implementation methods and specific operation processes, but the protection scope of the present invention is not limited to the following embodiments.

[0038] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0039] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "multiple" and "several" mean two or more, unless otherwise clearly and specifically defined.

[0041] In the following implementation manners or examples, unless otherwise specified, the component models, material names, connection structures, layout forms and other features indicate that they are all conventional components or conventional structures used in the art to achieve corresponding functions.

[0042] Example 1

[0043] See also Figure 1-5 , this embodiment provides a modular dust collector for acoustic wave assisted pulse jet cleaning, including an air inlet pipe 1, a filter unit module 12, an ash hopper 14, and an air outlet pipe 15;

[0044] The filter unit module 12 is composed of an upper box body 9 and an outer filter folded filter element 13. There are four filter unit modules 12 in total. The four filter unit modules 12 are integrally arranged above the ash hopper 14.

[0045] The air inlet pipe 1 is vertically placed in the center of the four filter unit modules 12, and the air outlet pipe 15 is installed on the side of the upper box body 9;

[0046] The air inlet pipe 1 and the ash hopper 14 are located on the same center line.

[0047] See also Figure 2 , 4 filter unit modules 12 are arranged in a windmill shape, and a sound-absorbing layer 11 is also provided on the filter unit module 12. Each filter unit module 12 is 5m long, 2m wide and 8m high; the air volume processed by each filter unit module 12 is 2-3w m 3 / h, the air volume of the entire dust removal system is 8-12w m 3 / h.

[0048] Specifically, each set of upper box bodies 9 includes a set of pulse jet devices and a plurality of sound wave sounding diaphragms 16 .

[0049] Specifically, the pulse spray device includes an air bag 2, a main control electromagnetic pulse valve 3, an electromagnetic valve 4, a pulse branch pipe 6, a pulse main pipe 8, and a spray pipe;

[0050] A main control electromagnetic pulse valve 3 is installed on the pulse main pipe 8, and the main control electromagnetic pulse valve 3 is connected to the air bag 2. The main control electromagnetic pulse valve 3 and the air bag 2 are located outside the upper box body 9, and are used to simultaneously control the air intake of the pulse main pipe 8 and the pulse branch pipe 6;

[0051] A solenoid valve 4 is installed on the pulse branch pipe 6. The solenoid valve 4 is located outside the upper box body 9 and is used to independently control the air intake of the pulse branch pipe 6.

[0052] Eight blowing pipes are led out from the pulse main pipe 8 and the pulse branch pipe 6. The pipe mouth of one blowing pipe blows the upper filter port of an external filter folded filter element 13. The blowing pipe includes an inner pipe 5, an outer pipe 7, and a blowing pipe chassis 10. The outer pipe 7 is inserted into the lower half of the inner pipe 5. The blowing pipe chassis 10 is arranged between the outer wall of the inner pipe 5 and the inner wall of the outer pipe 7.

[0053] See also Figure 4 In this embodiment, three sound wave sounding diaphragms 16 are installed on each blowing tube chassis 10.

[0054] In this embodiment, the distance between the blowing pipe chassis 10 and the upper filter opening of the external filter folded filter element 13 is 200 mm.

[0055] See also Figure 5 The outer filter folded filter core 13 includes an outer filter folded filter paper 17 and filter ports at the upper and lower ends thereof and support plates at both sides, and the outer filter folded filter cores 13 are arranged at equal distances.

[0056] In this embodiment, the outer filter folded filter paper 17 is a plastic-fired plate, the material of the plastic-fired plate is polyethylene, and the surface of the plastic-fired plate is coated with a polytetrafluoroethylene resin film; the fold depth of the outer filter folded filter paper 17 is 25 mm, and the fold height of the outer filter folded filter paper 17 is 30 mm.

[0057] The working principle of the modular dust collector in this embodiment:

[0058] During operation, dust-laden gas enters from one end of the air inlet pipe 1 and is evenly distributed in each filter unit module 12. When the dust passes through the filter unit module 12, most of the dust is intercepted by the external filter paper 17 due to the effects of screening, inertial collision, diffusion and electrostatic adsorption, and the clean gas is discharged from the air outlet pipe 15.

[0059] As time goes by, more and more dust accumulates on the filter paper, increasing the resistance of the filter paper and causing the processed air volume to gradually decrease. For normal operation, the pressure must be controlled within 800-1500Pa. Once the sensor detects that the pressure exceeds the range, the PLC control system will receive an electrical signal and start cleaning the filter paper.

[0060] When pulse spraying and sonic cleaning are used in combination, the main solenoid pulse valve 3 and the solenoid valve 4 are opened by the PLC control system, and the compressed air in the air bag 2 enters the spray pipe through the pulse main pipe 8 and the pulse branch pipe 6 and is sprayed into the corresponding outer filter folded filter element 13. At the same time, the sonic sounding diaphragm 16 vibrates under the action of the pulse airflow to generate sound waves, and the outer filter folded filter paper 17 shakes violently, causing the dust accumulated on the surface of the filter paper to fall off, and the cleaned dust falls into the ash hopper 14 and is discharged through the ash discharge system.

[0061] When only sonic cleaning is performed, the PLC control system opens the main control electromagnetic pulse valve 3 and closes the solenoid valve 4. The compressed air in the air bag 2 enters the injection pipe through the pulse main pipe 8 and is injected into the corresponding external filter folded filter element 13. The sonic sounding diaphragm 16 vibrates under the action of the pulse airflow, generating sound waves to clean the dead corners of the external filter folded filter paper 17. The cleaned dust falls into the ash hopper 14 and is discharged through the ash discharge system. In this way, the dust accumulated on the filter paper is periodically pulse-blown and sonic cleaned, so that the purified gas passes normally and the normal operation of the dust removal system is ensured.

[0062] The above description of the embodiments is to facilitate the understanding and use of the present invention by those skilled in the art. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the protection scope of the present invention.

Claims

1. A modular dust collector for acoustic wave assisted pulse jet cleaning, characterized in that: It comprises an air inlet pipe (1), a filter unit module (12), an ash hopper (14), and an air outlet pipe (15); The filter unit module (12) is composed of an upper box body (9) and an outer filter folded filter element (13). There are four filter unit modules (12) in total. The four filter unit modules (12) are arranged as a whole above the ash hopper (14); The air inlet pipe (1) is vertically placed in the center of the four filter unit modules (12), and the air outlet pipe (15) is installed on the side of the upper box body (9); Dust-containing gas enters the dust collector through the air inlet pipe (1), is evenly dispersed through four filter unit modules (12), and is then cleaned through a sound wave-assisted pulse jet device, and the clean gas is discharged from the air outlet pipe (15).

2. A modular dust collector for acoustic wave assisted pulse jet cleaning according to claim 1, characterized in that: The four filter unit modules (12) are arranged in a windmill shape.

3. A modular dust collector for acoustic wave assisted pulse jet cleaning according to claim 1, characterized in that: Each set of upper boxes (9) includes a set of pulse blowing devices and a plurality of sound wave sounding diaphragms (16).

4. A modular dust collector for acoustic wave assisted pulse jet cleaning according to claim 3, characterized in that: The pulse spraying device comprises an air bag (2), a main control electromagnetic pulse valve (3), an electromagnetic valve (4), a pulse branch pipe (6), a pulse main pipe (8), and a spraying pipe; A main control electromagnetic pulse valve (3) is installed on the pulse main pipe (8), and the main control electromagnetic pulse valve (3) is connected to the air bag (2). The main control electromagnetic pulse valve (3) and the air bag (2) are located outside the upper box body (9) and are used to simultaneously control the air intake of the pulse main pipe (8) and the pulse branch pipe (6); A solenoid valve (4) is installed on the pulse branch pipe (6), and the solenoid valve (4) is located outside the upper box body (9) and is used to independently control the air intake of the pulse branch pipe (6); A plurality of blowing pipes are led out from the pulse main pipe (8) and the pulse branch pipe (6), and the pipe opening of one blowing pipe is used to blow the filter opening at the upper end of an external filter folded filter element (13). The blowing pipe comprises an inner pipe (5), an outer pipe (7), and a blowing pipe chassis (10). The outer pipe (7) is inserted into the lower half of the inner pipe (5), and the blowing pipe chassis (10) is arranged between the outer wall of the inner pipe (5) and the inner wall of the outer pipe (7).

5. A modular dust collector for acoustic wave assisted pulse jet cleaning according to claim 3, characterized in that: The sound wave sounding diaphragm (16) is installed on the blowing pipe chassis (10).

6. A modular dust collector for acoustic wave assisted pulse jet cleaning according to claim 4, characterized in that: The distance between the blowing pipe bottom plate (10) and the upper filter opening of the external filter folded filter element (13) is 150 to 300 mm.

7. A modular dust collector for acoustic wave assisted pulse jet cleaning according to claim 1, characterized in that: The outer filter folded filter core (13) comprises two pieces of outer filter folded filter paper (17) and filter ports at the upper and lower ends thereof and support plates at both sides, and the outer filter folded filter cores (13) are arranged at equal distances.

8. A modular dust collector for acoustic wave assisted pulse jet cleaning according to claim 7, characterized in that: The outer filter folded filter paper (17) is a plastic-sintered plate, the fold depth of the outer filter folded filter paper (17) is 20 to 30 mm, and the fold height of the outer filter folded filter paper (17) is 30 to 40 mm.

9. A modular dust collector for acoustic wave assisted pulse jet cleaning according to claim 1, characterized in that: A sound-absorbing layer (11) is also provided on the filter unit module (12).

10. A modular dust collector for acoustic wave assisted pulse jet cleaning according to claim 1, characterized in that: The air inlet pipe (1) and the ash hopper (14) are located on the same center line.

Images