Cloth bag dust-removing, vibration-exciting and dust-cleaning system

Abstract

The utility model discloses a cloth bag dust-removing, vibration-exciting and dust-cleaning system, which consists of a framework, a cloth bag and a vibration-exciting device, the framework adopts an inner-outer double-layer cage body structure, and the cloth bag comprises an inner cloth bag and an outer cloth bag, so that double-layer filtration is formed, and the dust trapping efficiency is improved. The vibration excitation device is composed of a vibration exciter, a flexible belt and a vibration piece, and the vibration exciter is installed on the insertion rod through the flexible belt and drives the vibration piece to act on the cloth bag to remove dust in a high-frequency vibration mode. The flexible belt can relieve vibration impact on the framework and reduce noise. Starting and stopping of the vibration exciter and the exciting force are controlled according to the front and back airflow pressure difference of the cloth bag, and ash removal according to needs is achieved. Dust on the surface of the cloth bag is removed through excitation dust removal, airflow resistance is reduced, the fluidization effect is stabilized, the service life of the cloth bag is prolonged, energy consumption is reduced, and the device is suitable for drying treatment of powdery or granular materials in multiple industries.

Description

TECHNICAL FIELD

[0001] The utility model belongs to material drying and dust removing equipment technical field relates to a cloth bag dust removal vibration cleaning system, can realize to the fine dust produced in the boiling drying process carries out efficient capture and removal. BACKGROUND

[0002] At present, the dust removal technology applied to the boiling dryer mainly includes cloth bag dust removal, cyclone dust removal, wet dust removal and electrostatic dust removal. Among them, the cloth bag dust removal technology becomes one of the most widely used dust removal methods due to its high dust removal efficiency, simple structure, stable operation and other advantages. The cloth bag dust removal device uses the filter bag made of fiber fabric to capture the dust particles in the airflow, so that the clean gas passes through, thereby realizing the gas-solid separation. The cleaning method of the cloth bag dust removal is one of the key factors affecting its performance, and the existing boiling dryer generally adopts cloth bag dust removal mechanical shaking or pulse blowing cleaning method.

[0003] The cloth bag of the mechanical shaking cleaning method is arranged at the upper part of the fluidized chamber and is divided into left and right chambers, and the left and right chambers are alternately and intermittently circulated to shake and clean. When the fine powder is collected to a certain extent, the left exhaust valve is closed, and the left chamber cloth bag is shaken up and down under the action of the air cylinder, and the shaken powder falls back into the fluidized bed for drying again. After the operation is completed, the left exhaust valve is opened, the right exhaust valve is closed, and the right chamber cloth bag is shaken again. The left and right chambers are alternately shaken in this way to clean the collected powder, so that the filter bag remains unobstructed. However, the shaking cleaning method has the following disadvantages: the cleaning is not complete, the cloth bag airflow resistance is unstable, the fluidized chamber airflow velocity pulsation is caused, the fluidization effect is affected, and the cloth bag is easily damaged and has a short service life.

[0004] The pulse blowing cleaning method is to arrange high-pressure gas nozzles above the cloth bag, and when the fine powder is collected to a certain extent, the nozzle valve is opened one by one or at the same time to blow the cloth bag in reverse flow to clean the cloth bag. Compared with the shaking cleaning, the pulse blowing cleaning has relatively good cleaning effect. However, the pulse blowing cleaning method also has some disadvantages: the cloth bag airflow resistance is unstable, the instantaneous airflow impact caused by the blowing gas easily causes severe disturbance to the internal flow field of the fluidized chamber, affecting the fluidization effect. Furthermore, the high-pressure gas directly impacts the filter bag, which easily causes fatigue damage to the filter bag and reduces the service life of the filter bag.

[0005] In summary, the existing cloth bag dust removal technology still has many problems in cleaning effect, airflow stability, cloth bag life, energy consumption and the like. Therefore, how to improve the cleaning efficiency, stabilize the airflow and prolong the service life of the cloth bag is a technical problem to be solved. SUMMARY

[0006] (1) Utility model purpose

[0007] The utility model discloses a kind of cloth bag dust cleaning systems, including: skeleton, cloth bag, fluidized bed and vibration excitation device.

[0008] (Two) technical scheme

[0009] To achieve the utility model purposes, the utility model uses following technical solutions:

[0010] A kind of cloth bag dust cleaning system, including:

[0011] Skeleton, overall cage structure, including annular top plate, inner cage and outer cage, wherein: the outer edge of annular top plate is fixed on the side wall of fluidized bed top cylinder;Inner cage and outer cage are arranged at the bottom of annular top plate, and several axial extension insertion rods are provided between the two along the circumference;

[0012] Cloth bag, including inner cloth bag and outer cloth bag, wherein: inner cloth bag is attached and fixed on the inner side of inner cage, and outer cloth bag is covered and fixed on the outer side of outer cage;

[0013] Vibration excitation device, several are provided along the circumference, and each vibration excitation device includes vibration exciter, flexible belt and vibrating reed, wherein: vibration exciter is installed on insertion rod through the flexible belt of its left and right sides, and its inner and outer sides are respectively provided with a vibrating reed, and the vibrating reed of inner and outer sides is all along axial extension aperture plate structure, and inner vibrating reed and outer vibrating reed are respectively opposite and have gap with the surface of inner cloth bag and outer cloth bag.

[0014] Preferably, fluidized bed top cylinder includes lower cylinder, upper cylinder and sealing gasket at the connecting place of the two, annular top plate is fixedly connected with upper cylinder and lower cylinder through flange bolt, and the lower surface of the outer edge of annular top plate is tightly combined with sealing gasket to form sealing structure.

[0015] Preferably, inner cage and outer cage are all composed of multiple axial extension support rods and several annular support rings arranged along the circumference, and are formed into cage support structure as a whole.

[0016] Preferably, sealing ring and clamp are provided between inner cloth bag and the top of inner cage, and between outer cloth bag and the top of outer cage, and the clamp is used to fasten cloth bag on skeleton.

[0017] Preferably, the number of vibration excitation device is 4-12, and is evenly distributed along the circumference of skeleton, the included angle between adjacent vibration excitation devices is 30°-90°, the vibration phase difference of adjacent vibration exciters is 90°-180°, and adjacent vibration exciters have different axial installation heights.

[0018] Preferably, the skeleton is further provided with a central cage at the center thereof, the outer side of the central cage is covered and fixed with a central cloth bag, and the central cage is provided with at least one vibration exciting device.

[0019] Preferably, the vibration exciting device is selected from at least one of an inertial vibration exciting device, an electric vibration exciting device and an electromagnetic vibration exciting device, the output shaft of the vibration exciting device is rigidly connected with the vibration sheet, and the vibration exciting force is perpendicular to the surface of the cloth bag.

[0020] Preferably, the vibration sheet is arranged on both the inner side and the outer side of the vibration exciting device through a connecting plate, the plate surface of the connecting plate is in a perforated plate structure, the mesh rate is not less than 50%, the material is an elastic metal material, and the surface curvature and hardness are adapted to the cloth bag.

[0021] Preferably, the gap between the vibration sheet and the surface of the cloth bag is adjustable to adapt to the dust characteristics and dust removal requirements of different materials.

[0022] Preferably, the flexible belt is made of rubber or engineering plastic material, the thickness is 3-8 mm, the width is 30-50 mm, and the two ends of the flexible belt are fixedly connected with the vibration exciting device and the inserting rod respectively.

[0023] (Three) Technical effects

[0024] Compared with the prior art, the cloth bag dust removal vibration exciting dust removal system has the following beneficial and remarkable technical effects:

[0025] (1) The vibration exciting dust removal device of the utility model replaces the traditional shaking dust removal and pulse blowing dust removal mode, and significantly improves the dust removal effect. The vibration exciting device generates vibration through the vibration exciting device, and the vibration sheet can completely remove the dust attached to the cloth bag by beating the surface of the cloth bag, reduce the aggregation time of the dust on the surface of the cloth bag, ensure the stability of the cloth bag airflow resistance, avoid the airflow resistance fluctuation caused by incomplete dust removal, and thus improve the uniformity of the airflow speed in the fluidized bed and optimize the fluidization effect.

[0026] (2) The cloth bag and the skeleton structure of the cloth bag dust removal vibration exciting dust removal system can increase the dust removal area, reduce the cloth bag airflow resistance, and improve the dust removal efficiency; the inner cloth bag and the outer cloth bag are respectively attached to the inner cage and the outer cage of the skeleton to form a double-layer filtering barrier, which can more effectively capture the dust in the airflow, reduce the dust escaping, and at the same time, the double-layer filtering structure increases the filtering area, reduces the load of the single-layer cloth bag, and prolongs the service life of the cloth bag.

[0027] (3) The vibration sheet of the utility model adopts a perforated plate structure extending along the axial direction, which can maintain a large airflow flow area during the dust removal process and avoid the flow field disturbance caused by the vibration sheet blocking the airflow. In addition, the utility model suspends the vibration exciting device through the flexible belt, avoids the problem of excessive impact force caused by direct rigid connection, and effectively reduces the structural loss of the cloth bag and the skeleton in the vibration transmission process. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a schematic diagram of a cloth bag dust removal and vibration cleaning system in the utility model;

[0029] Figure 2 is Figure 1 is an enlarged view of a local area I;

[0030] Figure 3 is Figure 1 is an A-A sectional view;

[0031] Figure 4 is a three-dimensional structure schematic diagram of a vibration device in the utility model;

[0032] Figure 5 is a three-dimensional structure schematic diagram of a skeleton in the utility model;

[0033] Figure 6 is a plan view of the skeleton in the utility model.

[0034] BRIEF DESCRIPTION OF DRAWINGS:

[0035] 110-lower cylinder, 120-sealing gasket, 130-upper cylinder, 200-cloth bag dust removal and vibration cleaning system, 210-cloth bag, 211-inner cloth bag, 212-outer cloth bag, 213-central cloth bag, 220-vibration device, 221-vibration piece, 222-connection plate, 223-vibrator, 224-flexible belt, 230-skeleton, 231-ring-shaped top plate, 232-inner cage, 233-outer cage, 234-inserting rod, 235-central cage, 240-sealing ring, 250-hoop. DETAILED DESCRIPTION

[0036] The utility model aims at providing a cloth bag dust removal and vibration cleaning system, in order to make the purpose, technical scheme and advantage of the utility model embodiment clearer, the technical scheme in the utility model embodiment will be described in more detail below in conjunction with the drawings in the utility model embodiment. The described embodiment is a part of the embodiment of the utility model, not all the embodiments, and the described embodiment is exemplary, aims at explaining the utility model, and can not be understood as the limitation of the utility model.

[0037] As a specific embodiment, as shown in Figure 1 The cloth bag dust removal and vibration cleaning system 200 of the utility model is arranged on the top of the fluidized bed as a whole, is used for carrying out dust capture to the airflow discharged by the fluidized bed and keeping the cloth bag unobstructed through the vibration cleaning mode.

[0038] The cloth bag dust removal and shock cleaning system 200 comprises a framework 230, cloth bags 210 and a shock device 220.

[0039] More specifically, as shown in Figure 1 and Figure 2 , the top cylinder of the fluidized bed comprises a lower cylinder 110, an upper cylinder 130 and a sealing gasket 120 located at the connection between the two; the ring-shaped top plate 231 of the framework 230 (as shown in Figure 5 and Figure 6 ) is fixedly connected with the upper cylinder 130 and the lower cylinder 110 through flange bolts, and the lower surface of the ring-shaped top plate 231 is tightly attached to the sealing gasket 120 to form a sealing structure, thereby ensuring that the airflow can be discharged out of the fluidized bed only after being filtered by the cloth bags 210.

[0040] As shown in Figure 5 , 6 , in the embodiment of the utility model, the inner cage 232 and the outer cage 233 of the framework 230 are both composed of a plurality of support rods extending along the axial direction and arranged along the circumferential direction and a plurality of annular support rings distributed along the circumferential direction and form a cage-shaped support structure, the spacing between the support rods and the annular support rings is set according to the material quality of the cloth bags 210 and the material characteristics, thereby ensuring that the cloth bags 210 will not collapse and deform under the action of the airflow negative pressure and at the same time ensuring that the cloth bags 210 have sufficient strength to withstand the vibration action of the shock device 220.

[0041] Furthermore, the framework 230 is also provided with a central cage 235 located at the center thereof, the outer side of the central cage 235 is covered and fixed with a central cloth bag 213, and the central cage 235 is provided with at least one shock device 220, and the vibration piece 221 of the shock device 220 is used to transmit the shock force generated by the shock generator 223 to the surface of the central cloth bag 213 to remove the dust.

[0042] As shown in Figure 2As shown, the inner cloth bag 211 and the top of the inner cage 232, the outer cloth bag 212 and the top of the outer cage 233 are provided with a sealing ring 240 and a clamp 250, the clamp 250 is used to fasten the cloth bag 210 on the skeleton 230, prevent the cloth bag 210 from falling off or displacement under the action of airflow and excitation, the sealing ring 240 is used to ensure that the airflow does not leak from the connection between the cloth bag 210 and the skeleton 230, ensure that the cloth bag 210 maintains stable and reliable filtering effect in the long-term use, at the same time, facilitate the installation and maintenance of the cloth bag 210. And preferably, the inner cloth bag 211 and the outer cloth bag 212 are made of filter material with good air permeability, wear resistance and high temperature resistance, the fiber diameter is 10-20 microns, the porosity is 70%-85%, the filtration precision is 1-10 microns, the surface is treated by antistatic and anti-adhesion, the material is selected from polyester, polypropylene, polyamide, glass fiber or polytetrafluoroethylene according to the characteristics of the treated material, to adapt to different process conditions and material characteristics; And wherein, the filtration precision of the inner cloth bag 211 is greater than that of the outer cloth bag 212, to ensure that the inner and outer cloth bags form a gradient filtering structure, so that the outer cloth bag 212 is used for trapping larger particles dust, and the inner cloth bag 211 is used for trapping fine dust, thereby improving the overall dust removal efficiency and reducing the frequency of cloth bag cleaning.

[0043] As Figure 3 and Figure 4 As shown in the utility model, the number of the excitation device 220 is 4-12, which is uniformly distributed along the circumference of the skeleton 230, and the included angle between adjacent excitation devices 220 is 30°-90°. Each excitation device 220 mainly consists of a vibrating plate 221, a connecting plate 222, an excitation vibrator 223, a flexible belt 224 and the like. Each excitation vibrator 223 is installed and fixed on the plug rod 234 between the inner and outer double-layer cages of the skeleton 230 through the through holes in the side edges of the flexible belts 224 on the left and right sides of the excitation vibrator 223. The flexible belts 224 can slow down or avoid causing vibration and noise of the skeleton due to their flexibility. The inner and outer sides of the excitation vibrator 223 are respectively fixedly connected with a vibrating plate 221 through a connecting plate 222. The excitation force generated by the excitation vibrator 223 is transmitted to the surface of the inner and outer cloth bags through the inner and outer vibrating plates 221 to remove dust. In addition, the vibration phase difference of the excitation vibrators 223 of adjacent excitation devices 220 is 90°-180° and different axial installation heights are set to avoid resonance superposition, and each excitation vibrator 223 is independently controlled to start and stop and the excitation force is controlled to be large or small, so as to realize regional and time period cleaning, avoid large fluctuation of airflow in the fluidized bed caused by simultaneous cleaning, and ensure the stability of fluidized drying.

[0044] More specifically, the exciter 223 can be inertial, electric and electromagnetic, the exciter 223 generates vibration and transmits the vibration through its output shaft and by the connecting plate 222 to the vibration sheet 221, the excitation force direction is perpendicular to the surface of the cloth bag 210, and the vibration sheet 221 vibrates to beat the surface of the cloth bag 210 to play a role in removing the dust on the cloth bag 210. The start and stop of the exciter 223 and the excitation frequency and excitation amplitude are dynamically adjusted according to the material dust characteristics and the front and back pressure difference of the cloth bag 210, and when the pressure difference reaches the preset threshold, the excitation dust removal is started, and the greater the pressure difference, the greater the corresponding excitation frequency and excitation amplitude, and when the pressure difference decreases to the normal range, the excitation is stopped. To adapt to the dust removal requirements under different material characteristics and different dust load conditions, prolong the service life of the cloth bag 210 and reduce energy consumption and operating noise.

[0045] In the utility model embodiment, the vibration sheet 221 is arranged on the inner and outer sides of the exciter 223 through the connecting plate 222, and the plate surface is designed in a mesh plate type, the aperture size and distribution of which are optimized according to the airflow velocity and dust particle size, and the mesh rate is not less than 50% to prevent the airflow from being blocked and reduce the flow area, while avoiding the dust from accumulating on the surface of the vibration sheet 221. The material of the vibration sheet 221 is preferably an elastic metal material, and the surface curvature and hardness thereof are adapted to the cloth bag 210 to avoid damaging the cloth bag 210 during vibration, while meeting the requirements of airflow circulation and vibration transmission; and the gap between the vibration sheet 221 and the cloth bag 210 is preferably adjustable, and the gap size between the two is adjusted to adapt to the dust characteristics and dust removal requirements of different materials, to ensure the dust removal effect while avoiding damage to the cloth bag 210 due to excessive friction.

[0046] As a preferred, the flexible belt 224 is made of rubber or engineering plastic material with good elasticity and fatigue resistance, and the elastic parameters thereof are optimized, the thickness thereof is 3-8 mm, and the width thereof is 30-50 mm, to ensure that the vibration impact of the exciter 223 is effectively absorbed during long-term use, reduce the damage of vibration to the support framework 230, and reduce the noise level during equipment operation, and the two ends of the flexible belt 224 are fixedly connected with the exciter 223 and the insertion rod 234, respectively.

[0047] The cloth bag dust removal excitation dust removal system has the advantages that the cloth bag 210 captures fine powder in the fluidized bed airflow, the vibrator 223 in the excitation device 220 generates vibration to drive the vibration sheet 221 to vibrate and beat the cloth bag 210, and the fine powder on the cloth bag 210 is removed, thereby reducing the residence time of the fine powder on the cloth bag 210, reducing the airflow resistance of the cloth bag 210, improving the dust removal efficiency, and reducing energy consumption.

[0048] The above-mentioned embodiments fully and effectively achieve the purpose of the present application. Those skilled in the art can understand that the present application includes but is not limited to the content described in the drawings and the above specific embodiments. Although the present application has been described in relation to the presently preferred embodiments thereof, it is to be understood that the present application is not limited to the disclosed embodiments, and any modification not deviating from the functional and structural principles of the present application is to be included in the scope of the claims.

Claims

1. A cloth bag dust removal and vibration cleaning system, characterized in that, The application relates to a fluidized bed drying device, which comprises a framework, a cloth bag and a vibration excitation device. The framework is a cage-shaped structure and comprises a ring-shaped top plate, an inner cage and an outer cage, wherein the outer edge of the ring-shaped top plate is fixed to the side wall of a top cylinder of a fluidized bed, the inner cage and the outer cage are arranged at the bottom of the ring-shaped top plate, and a plurality of axially-extending insertion rods are arranged between the inner cage and the outer cage in the circumferential direction. The cloth bag comprises an inner cloth bag and an outer cloth bag, wherein the inner cloth bag is attached to and fixed to the inner side of the inner cage, and the outer cloth bag is wrapped around and fixed to the outer side of the outer cage. The vibration excitation device comprises a plurality of vibration exciters, flexible belts and vibration sheets, wherein each vibration exciter is mounted on the insertion rod through the flexible belts arranged on the left and right sides of the vibration exciter, the inner and outer sides of the vibration exciter are respectively provided with a vibration sheet, the vibration sheets arranged on the inner and outer sides are in the form of a hole plate structure extending in the axial direction, and the inner and outer vibration sheets are respectively opposite to the surfaces of the inner and outer cloth bags and have a gap.

2. The cloth bag dust removal and vibration cleaning system according to claim 1, characterized in that: The top cylinder of the fluidized bed comprises a lower cylinder, an upper cylinder and a sealing gasket arranged at the joint of the lower cylinder and the upper cylinder, the ring-shaped top plate is fixedly connected to the upper cylinder and the lower cylinder through flanges and bolts, and the lower surface of the outer edge of the ring-shaped top plate is tightly attached to the sealing gasket to form a sealing structure.

3. The cloth bag dust removal and vibration cleaning system according to claim 1, characterized in that: The inner cage and the outer cage are respectively composed of a plurality of support rods extending in the axial direction and arranged in the circumferential direction and a plurality of annular support rings, and the inner cage and the outer cage are integrally formed into a cage-shaped support structure.

4. The cloth bag dust removal and vibration cleaning system according to claim 1, characterized in that: Sealing rings and clamps are arranged between the inner cloth bag and the top of the inner cage and between the outer cloth bag and the top of the outer cage, and the clamps are used for fastening the cloth bag to the framework.

5. The cloth bag dust removal and vibration cleaning system according to claim 1, characterized in that: The number of the vibration excitation devices is 4-12, the vibration excitation devices are uniformly distributed along the circumferential direction of the framework, the included angle between adjacent vibration excitation devices is in the range of 30-90 degrees, the vibration phase difference between adjacent vibration exciters is in the range of 90-180 degrees, and adjacent vibration exciters have different axial installation heights.

6. The cloth bag dust removal and vibration cleaning system according to claim 1, characterized in that: The framework is further provided with a central cage arranged at the center of the framework, the outer side of the central cage is wrapped around and fixed with a central cloth bag, and the central cage is provided with at least one vibration excitation device.

7. The cloth bag dust removal and vibration cleaning system according to claim 1 or 6, characterized in that: The vibration exciter is selected from at least one of an inertial vibration exciter, an electric vibration exciter and an electromagnetic vibration exciter, the output shaft of the vibration exciter is rigidly connected to the vibration sheet, and the vibration excitation force is perpendicular to the surface of the cloth bag.

8. The cloth bag dust removal and vibration cleaning system according to claim 1, characterized in that: The vibration sheet is arranged on the inner and outer sides of the vibration exciter through a connecting plate, the plate surface of the vibration sheet is in the form of a hole plate structure, the mesh rate of the vibration sheet is not less than 50%, the material of the vibration sheet is an elastic metal material, and the surface curvature and hardness of the vibration sheet are adapted to the cloth bag.

9. The cloth bag dust removal and vibration cleaning system according to claim 8, characterized in that: The gap between the vibration sheet and the surface of the cloth bag is adjustable to adapt to the dust characteristics and dust removal requirements of different materials.

10. The cloth bag dust removal and vibration cleaning system according to claim 1, characterized in that: The flexible belt is made of rubber or engineering plastic, the thickness of the flexible belt is 3-8 mm, the width of the flexible belt is 30-50 mm, and the two ends of the flexible belt are fixedly connected to the vibration exciter and the insertion rod.

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