CN115814528A

CN115814528A - Self-cleaning bag-type dust collector

Info

Publication number: CN115814528A
Application number: CN202211508404.2A
Authority: CN
Inventors: 黄佳华; 王新尧
Original assignee: Changzhou City Kang'an Environmental Equipment Co ltd
Current assignee: Changzhou City Kang'an Environmental Equipment Co ltd
Priority date: 2022-11-28
Filing date: 2022-11-28
Publication date: 2023-03-21

Abstract

The invention relates to the technical field of bag-type dust collectors, in particular to a self-cleaning bag-type dust collector which comprises a box body, a box cover and a bag filtering mechanism, wherein a horizontally arranged partition plate is fixedly installed at the upper end of the inner wall of the box body, a mounting hole for installing the bag filtering mechanism is formed in the partition plate, the area between the box body and the box cover is divided into an air inlet cavity and an air outlet cavity through the partition plate, and the air inlet cavity is positioned below the partition plate.

Description

Self-cleaning bag-type dust collector

Technical Field

The invention relates to the technical field of bag-type dust collectors, in particular to a self-cleaning bag-type dust collector.

Background

The bag-type dust collector is equipment for separating dust from flue gas. The bag-type dust collector is also called a filter type dust collector, and is a dry type high-efficiency dust collector which is a dust collector for collecting solid particles in dust-containing gas by utilizing a bag-type filter element made of fiber weaved materials. The action principle is that dust particles are intercepted by colliding with the fibers due to the action of inertia force when bypassing the fibers of the filter cloth.

When the cloth bag consisting of the filter cloth is used, dust can be accumulated on the outer wall of the cloth bag, and in order to ensure that the cloth bag can continuously and efficiently operate, the outer wall of the filter bag needs to be cleaned. The pulse dust removing mechanism is an important cloth bag cleaning mechanism in a cloth bag dust remover, dust attached to a cloth bag is removed by the pulse dust removing mechanism through a method of blowing compressed air, a plurality of groups of pulse valves are possible according to the size of the dust remover, one group of pulse valves are opened each time to remove the dust of the part of the cloth bag controlled by the pulse valves, other cloth bags work normally, and the next group of pulse valves are opened after a period of time to clean the next part of the cloth bag. In the use process of the pulse dust removal mechanism, the cloth bag is deformed under the action of high-pressure airflow, the cloth bag is reset after the high-pressure airflow stops supplying air, and the cloth bag impacts the cloth bag cage to vibrate, so that dust falls off from the cloth bag.

Because the mesh size on the sack needs to keep relatively invariable, the filter cloth of preparation sack generally chooses for use and does not have bullet or low elasticity cloth, when leading to high-pressure draught to sweep the sack, sack deformation volume is very little, the kinetic energy that has when the sack resumes deformation is little, the vibration range of sack is general, the dust on the sack is difficult for droing, especially when the wind speed is great, mutual extrusion between the dust, bond into the slice, the parcel is in the outside of sack, when the sack takes place the vibration, the lamellar structure of dust is difficult for being destroyed, on the other hand, the dust of card in the sack filtration pore also is difficult for droing, lead to the long-term use back of filter, the sack takes place to block up, need carry out the degree of depth clearance to the sack, degree of depth clearance in-process, generally need take off the sack, and is complicated in operation, and production efficiency is influenced.

Disclosure of Invention

The invention aims to solve the defects in the prior art and provides a self-cleaning bag-type dust collector.

In order to achieve the purpose, the invention adopts the following technical scheme:

a self-cleaning type bag-type dust collector comprises a box body, a box cover and a bag-type filtering mechanism, wherein a horizontally arranged partition plate is fixedly installed at the upper end of the inner wall of the box body, a mounting hole for installing the bag-type filtering mechanism is formed in the partition plate, the area between the box body and the box cover is divided into an air inlet cavity and an air outlet cavity through the partition plate, the air inlet cavity is located below the partition plate, an air inlet communicated with the air inlet cavity is formed in the side wall of the box body, an air outlet pipe communicated with the air outlet cavity is communicated with the box body, the bag-type filtering mechanism comprises a bag and a retractable bag supporting frame, and dust on the outer wall of the bag is enabled to fall off through the retraction and reset of the bag supporting frame;

the bag-type automatic bag-type lifting device further comprises a control module, and the bag-type lifting device can automatically control the bag-type supporting frame to contract and reset through the control module.

Preferably, the sack support frame includes solid fixed ring and movable rod, gu fixed ring's lower extreme fixed mounting have with the first fixed pipe of sack upper end looks adaptation, gu fixed ring's lower terminal surface sets up evenly distributed's spout, the spout is along solid fixed ring's radial setting, the upper end of movable rod is connected with solid fixed ring through the spout, fixedly connected with evenly distributed's annular gasbag between the movable rod, through the inflation or the shrink of annular gasbag drive the movable rod along the spout motion.

Preferably, the upper end of the cloth bag filtering mechanism is provided with a second fixing pipe, a fifth electromagnetic valve communicated with the air outlet cavity is installed at the upper end of the second fixing pipe, a first air inlet pipe is further connected to the side wall of the second fixing pipe, an air outlet of the first air inlet pipe extends to the inside of the second fixing pipe, an outlet end of the first air inlet pipe is connected with a second air inlet pipe and a third air inlet pipe, an opening of the second air inlet pipe is arranged downwards, the second electromagnetic valve is installed in the second air inlet pipe, an opening of the third air inlet pipe is communicated with the annular air bag, the third electromagnetic valve is installed in the third air inlet pipe, and a fourth electromagnetic valve used for exhausting is installed in the annular air bag.

Preferably, the cross section of movable rod is arc, and the movable rod includes movable rod upper portion and movable rod lower part, inner wall and the outer wall fixed connection on movable rod upper portion of movable rod lower part, the upper end on movable rod upper portion be provided with the slider of spout looks adaptation, when the outer wall of movable rod lower part and sack contact, there is the clearance between the outer wall on movable rod upper portion and the inner wall of first fixed pipe, when the sack was strutted to the movable rod lower part, movable rod upper portion can not bump the inner wall of first fixed pipe.

Preferably, the outer wall of the box body is provided with a gas storage tank, the gas storage tank is connected with the first gas inlet pipe of each row through a gas supply pipe, and the gas supply pipe is provided with a first electromagnetic valve.

Preferably, control module includes detection module, data transfer module and treater, the treater respectively with first solenoid valve, second solenoid valve, third solenoid valve, fourth solenoid valve, fifth solenoid valve electric connection, detection module is including setting up at the first pressure sensor of the intracavity that admits air, go out the second pressure sensor in the air cavity and the inside third pressure sensor of annular gasbag, detect out the atmospheric pressure value of the intracavity portion of admitting air and go out the atmospheric pressure value of air cavity portion through detection module, and data transfer module transmits the atmospheric pressure value of the intracavity portion of admitting air and the atmospheric pressure value of going out the air cavity portion to the treater, and the treater calculates the atmospheric pressure difference of the chamber of admitting air and going out the air cavity, and analysis atmospheric pressure difference's change amount is controlled first solenoid valve, second solenoid valve, third solenoid valve, fourth solenoid valve and fifth solenoid valve.

Preferably, the self-cleaning bag-type dust collector comprises the following working steps:

step 1, connecting an air inlet with a pipeline for conveying dust-containing air flow, connecting an air outlet pipe with an inlet end of an induced draft fan, providing power for air flow through the induced draft fan, and treating the dust-containing air flow through a cloth bag filtering mechanism;

step 2, detecting air pressure values in the air inlet cavity and the air outlet cavity through a detection module, analyzing and comparing the variation of the air pressure difference through a processor, and selecting a proper cleaning mode;

step 3, after selecting a proper cleaning mode, cleaning the cloth bag according to the set cleaning mode;

and 4, in the cleaning process, continuously detecting the air pressure values in the air inlet cavity and the air outlet cavity through the detection module, and stopping cleaning when the variation of the air pressure difference is recovered to a preset value.

Preferably, the cleaning mode in the step 2 comprises pulse dust removal, moderate cleaning and deep cleaning;

preferably, the pulse dust removal method comprises the following specific steps: when the first electromagnetic valve is opened, the corresponding second electromagnetic valve discharges high-pressure airflow to perform pulse dust removal on the cloth bag;

preferably, the specific mode of moderate cleaning is as follows: the cloth bags are grouped according to corresponding air supply pipes, each air supply pipe corresponds to one group of cloth bags, one group of cloth bags is cleaned each time, when the group is cleaned, other groups work normally, in the cleaning process, a third electromagnetic valve is closed, a fourth electromagnetic valve is opened to release pressure of the annular air bags, the annular air bags shrink in the pressure release process, a movable rod gathers along the annular air bags, the cloth bags cling to the movable rod under the action of pressure difference of an air inlet cavity and an air outlet cavity, then a fifth electromagnetic valve is closed, the first electromagnetic valve and the second electromagnetic valve are opened, the interiors of the cloth bags are inflated through the second air inlet pipe, the cloth bags are inflated, the fourth electromagnetic valve is closed, the third electromagnetic valve is opened, the annular air bags are rapidly inflated through the third air inlet pipe, the second electromagnetic valve is closed, the movable rod rapidly moves outwards and impacts the inner walls of the cloth bags, dust on the cloth bags is ejected, and after one group is cleaned, the next group is cleaned;

preferably, the deep cleaning mode is as follows: the cloth bag is divided into groups according to corresponding air supply pipes, each air supply pipe corresponds to a group of cloth bags, one group is cleaned at a time, the other groups work normally, in the cleaning process, the third electromagnetic valve is closed firstly, the fourth electromagnetic valve is opened to release pressure of the annular air bags, the annular air bags shrink in the pressure release process, the movable rods gather along the annular air bags, the cloth bags can be tightly attached to the movable rods under the action of pressure difference of an air inlet cavity and an air outlet cavity, then the fifth electromagnetic valve is closed, the first electromagnetic valve and the second electromagnetic valve are opened, the cloth bags are inflated through the second air inlet pipe, the cloth bags are blown, after the second electromagnetic valve is closed, the third electromagnetic valve is opened quickly, the fourth electromagnetic valve is closed, dust is removed from air outlet pipes simultaneously, the annular air bags are blown through the third air inlet pipe, the movable rods move outwards quickly and impact the inner walls of the cloth bags, dust on the cloth bags is flicked, and after one group of cleaning is finished, the next group of cleaning is cleaned.

Preferably, in the step 2, an initial value of the air pressure difference is set as P, and when the variation of P is less than or equal to 10%, moderate cleaning is adopted; when the P variation is more than 10% and less than or equal to 30%, deep cleaning is adopted; when the P variation is more than 30%, deep cleaning is adopted.

Preferably, in the step 2, pulse dust removal is performed simultaneously with the moderate cleaning or the deep cleaning.

The invention has the beneficial effects that:

1. in this device, be provided with the sack filter mechanism of collapsible sack support frame, when gathering more dust on the sack in the sack filter mechanism, control sack support frame shrink, the sack follows the sack support frame shrink under the effect of chamber of admitting air and the chamber pressure difference of giving vent to anger, and the deformation volume of sack is big, and when the sack shrink was followed to the dust, pile up each other, the extrusion drops from the sack to the effectual dust of gathering on getting rid of the sack.

2. In this device, when adopting middle degree cleanness or degree of depth cleanness, behind the sack shrink, still remain partial dust on the sack, the sack resumes the in-process, earlier aerify the sack inside through the second intake pipe, with the sack inflation, through the rapid inflation of third intake pipe with annular gasbag, the quick outwards movement of movable rod strikes the sack inner wall, the sack takes place violent vibration, bounce out through the dust of movable rod on the sack outer wall, a set of clearance finishes the back, clear up a set of next, whole clearance in-process, the sack cleaner can normal operating, need not park the clearance, the operating efficiency of effectual improvement device.

3. In this device, when adopting the degree of depth clean, with the sack inflation back, close behind the second solenoid valve and open the third solenoid valve rapidly, because be full of the micropore on the sack, when the annular gasbag expands, the sack begins slow shrink, when movable rod contact sack, the sack is not in the biggest expansion area, after the movable rod striking sack, promote the sack and continue outside motion a bit distance, a small amount of dust in the sack filtration pore is pushed into inside the sack under inertial action, realize the degree of depth clean of sack, need carry out the secondary to the outlet duct combustion gas among the degree of depth clean process and remove dust, reduce the pollution of dust to the environment.

4. In this device, can be according to the pressure differential automatic selection sack clearance mode in chamber and the chamber of giving vent to anger of admitting air, when adopting the pulse to remove dust, clean effect is general, and energy consumption is low, when adopting the middle cleanness, clean effectual, energy consumption is general, when adopting the degree of depth clean, clean degree is thorough, nevertheless can reduce the wind pressure when the secondary removes dust or cause extra energy consumption, through the rational selection of clean mode, can effectual energy saving's use, also ensure the sack simultaneously and can obtain effectual clearance.

Drawings

FIG. 1 is a schematic view of a three-dimensional structure of a self-cleaning bag-type dust collector without a box cover, which is provided by the invention;

FIG. 2 is a schematic view of a bag filter mechanism of a self-cleaning bag-type dust collector in accordance with the present invention;

FIG. 3 is a schematic structural view of the bag filter mechanism of the self-cleaning bag-type dust collector without a fifth electromagnetic valve;

FIG. 4 is a schematic cross-sectional structure view of FIG. 3 of a self-cleaning bag-type dust collector proposed in the present invention;

FIG. 5 is a schematic view of the bottom structure of FIG. 3 of the self-cleaning bag-type dust collector in accordance with the present invention;

FIG. 6 is a schematic diagram of a side view structure of a movable rod of the self-cleaning bag-type dust collector proposed in the present invention;

FIG. 7 is a schematic perspective view of a movable rod of the self-cleaning bag-type dust collector according to the present invention;

FIG. 8 is a first schematic cross-sectional view of a movable rod of the self-cleaning bag-type dust collector in accordance with the present invention;

FIG. 9 is a first schematic cross-sectional view of a movable rod of the self-cleaning bag-type dust collector in accordance with the present invention;

FIG. 10 is a schematic view of a front view of a movable rod of the self-cleaning bag-type dust collector in accordance with the present invention;

FIG. 11 is a schematic structural view of a self-cleaning bag-type dust collector in front view according to the present invention;

fig. 12 is a schematic view of a three-dimensional structure of a bag-removing cover and a bag-filtering mechanism of the self-cleaning bag-type dust collector provided by the invention.

In the figure: 1 box body, 2 ash hoppers, 3 clapboards, 4 air inlets, 5 air outlets, 6 box covers, 7 air storage tanks, 8 first electromagnetic valves, 9 air supply pipes, 10 cloth bag filtering mechanisms, 31 mounting holes, 61 cover plates, 101 fixing rings, 102 first fixing pipes, 103 cloth bags, 104 movable rods, 105 second fixing pipes, 106 first air inlet pipes, 107 second air inlet pipes, 108 second electromagnetic valves, 109 third electromagnetic valves, 110 annular air bags, 111 fourth electromagnetic valves, 112 chutes, 113 fifth electromagnetic valves, 114 third air inlet pipes, 1041 movable rod upper parts, 1042 movable rod lower parts, 1043 sliding blocks, 1044 gas channels, 1045 convex strips and 1046 clamping rings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

In the embodiment, referring to fig. 1-12, a self-cleaning type bag-type dust collector comprises a box body 1, a box cover 6 and a bag-type filtering mechanism 10, wherein a horizontally arranged partition plate 3 is fixedly installed at the upper end of the inner wall of the box body 1, a mounting hole 31 for mounting the bag-type filtering mechanism 10 is formed in the partition plate 3, the region between the box body 1 and the box cover 6 is divided into an air inlet cavity and an air outlet cavity through the partition plate 3, the air inlet cavity is located below the partition plate 3, an air inlet 4 communicated with the air inlet cavity is formed in the side wall of the box body 1, an air outlet pipe 5 communicated with the air outlet cavity is communicated with the box body 1, an ash hopper 2 is installed at the lower end of the box body 1, the bag-type filtering mechanism 10 comprises a bag 103 and a retractable bag-type supporting frame, dust on the outer wall of the bag 103 is enabled to fall off through the retraction and reset of the bag-type supporting frame, a plurality of cover plates 61 are installed at the upper end of the box cover 6 through screws, the cover plate 61 is opened, the small-type dust collector in the air inlet cavity can be overhauled, the whole box cover 6 can be overhauled in a large range;

The cloth bag support frame comprises a fixing ring 101 and a movable rod 104, a first fixing pipe 102 matched with the upper end of a cloth bag 103 is fixedly mounted at the lower end of the fixing ring 101, sliding grooves 112 which are uniformly distributed are formed in the lower end face of the fixing ring 101, the sliding grooves 112 are arranged along the radial direction of the fixing ring 101, the upper end of the movable rod 104 is connected with the fixing ring 101 through the sliding grooves 112, annular air bags 110 which are uniformly distributed are fixedly connected between the movable rods 104, and the movable rods 104 are driven to move along the sliding grooves 112 through expansion or contraction of the annular air bags 110.

The bag filter mechanism 10 is characterized in that a second fixing pipe 105 is arranged at the upper end of the bag filter mechanism 10, a fifth electromagnetic valve 113 communicated with the air outlet cavity is installed at the upper end of the second fixing pipe 105, a first air inlet pipe 106 is further connected to the side wall of the second fixing pipe 105, the air outlet of the first air inlet pipe 106 extends to the inside of the second fixing pipe 105, the outlet end of the first air inlet pipe 106 is connected with a second air inlet pipe 107 and a third air inlet pipe 114, the opening of the second air inlet pipe 107 is arranged downwards, a second electromagnetic valve 108 is installed on the second air inlet pipe 107, the opening of the third air inlet pipe 114 is communicated with an annular air bag 110, a third electromagnetic valve 109 is installed on the third air inlet pipe 114, the third air inlet pipe 114 is a hose, and a fourth electromagnetic valve 111 for exhausting is installed on the annular air bag 110.

The cross section of the movable rod 104 is arc-shaped, the movable rod 104 comprises an upper movable rod portion 1041 and a lower movable rod portion 1042, the inner wall of the lower movable rod portion 1042 is fixedly connected with the outer wall of the upper movable rod portion 1041, a slider 1043 matched with the chute 112 is arranged at the upper end of the upper movable rod portion 1041, the slider 1043 is a dovetail chute, and when the outer wall of the lower movable rod portion 1042 is in contact with the cloth bag 103, a gap exists between the outer wall of the upper movable rod portion 1041 and the inner wall of the first fixed tube 102.

In order to facilitate the air supply of the annular air bag 110, as shown in fig. 10, a snap ring 1046 through which the third air inlet pipe 114 passes is arranged on the inner wall of the lower portion 1042 of the movable rod;

the lower movable rod portion 1042 may also be a hollow structure, as shown in fig. 8, that is, the lower movable rod portion 1042 is provided with an air channel 1044, the third air inlet pipe 114 is connected to one end of the air channel 1044, and the other end of the air channel 1044 is connected to an air inlet of the annular airbag 110, and the air channel 1044 is disposed in the lower movable rod portion 1042, so that the aesthetic property of the cloth bag support frame is improved, and the resistance to air flow is reduced.

A raised line 1045 (or a metal tube) may be disposed on the inner wall of the lower portion 1042 of the movable rod, as shown in fig. 9, an air channel 1044 is disposed inside the raised line 1045, the third air inlet pipe 114 is connected to one end of the air channel 1044, and the other end of the air channel 1044 is connected to an air inlet of the annular airbag 110.

Be provided with gas holder 7 on the outer wall of box 1, gas holder 7 is connected with the first intake pipe 106 of each row through air supply pipe 9 respectively, install first solenoid valve 8 on the air supply pipe 9.

The control module comprises a detection module, a data transmission module and a processor, wherein the processor is respectively electrically connected with the first electromagnetic valve 8, the second electromagnetic valve 108, the third electromagnetic valve 109, the fourth electromagnetic valve 111 and the fifth electromagnetic valve 113, the detection module comprises a first pressure sensor arranged in the air inlet cavity, a second pressure sensor arranged in the air outlet cavity and a third pressure sensor arranged in the annular air bag 110, the air pressure value in the air inlet cavity and the air pressure value in the air outlet cavity are detected by the detection module, the air pressure value in the air inlet cavity and the air pressure value in the air outlet cavity are transmitted to the processor by the data transmission module, the processor calculates the air pressure difference between the air inlet cavity and the air outlet cavity, analyzes the variation of the air pressure difference, and controls the first electromagnetic valve 8, the second electromagnetic valve 108, the third electromagnetic valve 109, the fourth electromagnetic valve 111 and the fifth electromagnetic valve 113.

The self-cleaning cloth bag dust remover comprises the following working steps:

step 1, connecting an air inlet 4 with a pipeline for conveying dust-containing air flow, connecting an air outlet pipe 5 with an inlet end of an induced draft fan, providing air flow flowing power through the induced draft fan, and treating the dust-containing air flow through a cloth bag filtering mechanism 10;

step 3, after a proper cleaning mode is selected, cleaning the cloth bag 103 according to the set cleaning mode;

The cleaning mode in the step 2 comprises pulse dust removal, moderate cleaning and deep cleaning;

the specific mode of pulse dust removal is as follows: the second electromagnetic valve 108 and the fifth electromagnetic valve 113 are in an open state, the third electromagnetic valve 109 and the fourth electromagnetic valve 111 are in a closed state, the first electromagnetic valve 8 is in an intermittent open state, and after the first electromagnetic valve 8 is opened, the corresponding second electromagnetic valve 108 discharges high-pressure air flow to perform pulse dust removal on the cloth bag 103;

the specific mode of moderate cleaning is as follows: the cloth bags 103 are grouped according to corresponding air supply pipes 9, each air supply pipe 9 corresponds to one group of cloth bags 103, one group is cleaned each time, when the group is cleaned, other groups work normally, in the cleaning process, the third electromagnetic valve 109 is closed firstly, the fourth electromagnetic valve 111 is opened to release pressure of the annular air bag 110, the annular air bag 110 contracts in the pressure release process, the movable rod 104 gathers together along with the annular air bag 110, the cloth bags 103 cling to the movable rod 104 under the action of pressure difference of an air inlet cavity and an air outlet cavity, then the fifth electromagnetic valve 113 is closed, the first electromagnetic valve 8 and the second electromagnetic valve 108 are opened, the interior of the cloth bags 103 is inflated through the second air inlet pipe 107, the cloth bags 103 are inflated, the fourth electromagnetic valve 111 is closed, the third electromagnetic valve 109 is opened, the annular air bags 110 are rapidly inflated through the third air inlet pipe 114, the second electromagnetic valve 108 is closed, the movable rod 104 rapidly moves outwards and impacts the inner walls of the cloth bags 103 to bounce dust on the cloth bags 103, and after one group is cleaned, the next group is cleaned;

the specific mode of deep cleaning is as follows: the cloth bags 103 are grouped according to corresponding air supply pipes 9, each air supply pipe 9 corresponds to one group of cloth bags 103, one group is cleaned every time, when the group is cleaned, other groups work normally, in the cleaning process, the third electromagnetic valve 109 is closed firstly, the fourth electromagnetic valve 111 is opened to release pressure of the annular air bags 110, the annular air bags 110 shrink in the pressure release process, the movable rods 104 gather together along with the annular air bags 110, the cloth bags 103 can cling to the movable rods 104 under the action of pressure difference of an air inlet cavity and an air outlet cavity, then the fifth electromagnetic valve 113 is closed, the first electromagnetic valve 8 and the second electromagnetic valve 108 are opened, the cloth bags 103 are inflated through the second air inlet pipe 107, the cloth bags 103 are inflated, after the second electromagnetic valve 108 is closed, the third electromagnetic valve 109 is opened quickly, the fourth electromagnetic valve 111 is closed, dust is removed from air outlet pipes 5, the annular air bags 110 are inflated quickly through the third air inlet pipe 114, the movable rods 104 move outwards quickly and impact the inner walls of the cloth bags 103, dust on the cloth bags 103 falls, and after one group is cleaned, the next group is cleaned.

The gas discharged from the gas outlet pipe 5 can be dedusted by adopting a filter screen, namely the outlet end of an induced draft fan is provided with two pipelines, one pipeline is directly emptied, the other pipeline is emptied after passing through the filter screen, the two pipelines are freely switched by an automatic control valve, and the gas discharged from the gas outlet pipe 5 needs to pass through the filter screen only when the deep cleaning is carried out;

the gas discharged from the gas outlet pipe 5 can be dedusted by a deduster, such as an electrostatic deduster, and when the deep cleaning is carried out, the deduster is kept to be opened, and at other times, the filter is kept to be closed.

In the deep cleaning process, when tail gas is treated by adopting a filter screen mode, the wind pressure is reduced, and a part of energy is consumed when an electrostatic dust collector is adopted.

In the step 2, setting an initial value of the air pressure difference as P, and adopting moderate cleaning when the variation of P is less than or equal to 10%; when the P variation is more than 10% and less than or equal to 30%, deep cleaning is adopted; when the P variation is more than 30%, deep cleaning is adopted.

In the step 2, pulse dust removal is carried out simultaneously when a cleaning mode of moderate cleaning or deep cleaning is adopted.

In this device, be provided with the sack filter mechanism of collapsible sack support frame, when gathering more dust on sack 103 among the sack filter mechanism, control sack support frame shrink, sack 103 follows the sack support frame shrink under the effect of chamber of admitting air and the chamber pressure differential of giving vent to anger, and the deformation volume of sack 103 is big, and when the sack 103 shrink was followed to the dust, piles up each other, the extrusion drops from the sack to the effectual dust of gathering on getting rid of the sack.

In this device, when adopting middle degree cleanness or degree of depth cleanness, sack 103 shrink back, still remain partial dust on the sack 103, the sack 103 resumes the in-process, inflate sack 103 inside through second intake pipe 107 earlier, with sack 103 inflation, through third intake pipe 114 with annular gasbag 110 rapid inflation, movable rod 104 quick outside motion and striking sack 103 inner wall, sack 103 takes place violent vibration, bounce out the dust on the sack 103 outer wall through movable rod 104, a set of clearance finishes the back, clear up next group, whole clearance in-process, the sack cleaner can normal operating, need not park the clearance, effectual improving device's operating efficiency.

In the device, when deep cleaning is adopted, after the cloth bag 103 is blown up, the second electromagnetic valve 108 is closed, and the third electromagnetic valve 109 (the interval time is 1s-3 s) is rapidly opened, because the cloth bag is fully distributed with micropores, the annular air bag 110 expands, the cloth bag 103 begins to slowly contract, when the movable rod 104 contacts the cloth bag, the cloth bag 103 is not in the maximum expansion area, after the movable rod 104 impacts the cloth bag, the cloth bag 103 is pushed to continuously move outwards for a short distance, a small amount of dust in the filtering holes of the cloth bag 103 is pushed into the cloth bag 103 under the action of inertia, the deep cleaning of the cloth bag 103 is realized, secondary dust removal is required to be carried out on gas discharged from the gas outlet pipe 5 in the deep cleaning process, and the pollution of the dust to the environment is reduced.

In this device, can be according to the air inlet chamber and go out the pressure differential automatic selection sack clearance mode in air cavity, when adopting the pulse to remove dust, clean effect is general, and energy consumption is low, when adopting the middle degree clean, clean effectual, energy consumption is general, when adopting the deep cleaning, clean degree is thorough, nevertheless can reduce the wind pressure when the secondary removes dust or cause extra energy consumption, through the reasonable selection of clean mode, can effectual energy saving's use, also ensure the sack simultaneously and can obtain effectual clearance.

In the case of the example 2, the following examples were conducted,

the above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. A self-cleaning cloth bag dust collector comprises a box body (1), a box cover (6) and a cloth bag filtering mechanism (10), wherein a horizontally arranged partition plate (3) is fixedly installed at the upper end of the inner wall of the box body (1), a mounting hole (31) for mounting the cloth bag filtering mechanism (10) is formed in the partition plate (3), the area between the box body (1) and the box cover (6) is divided into an air inlet cavity and an air outlet cavity through the partition plate (3), the air inlet cavity is located below the partition plate (3), an air inlet (4) communicated with the air inlet cavity is formed in the side wall of the box body (1), and an air outlet pipe (5) communicated with the air outlet cavity is communicated with the box body (1), and the self-cleaning cloth bag dust collector is characterized in that the cloth bag filtering mechanism (10) comprises a cloth bag (103) and a retractable cloth bag supporting frame, and dust on the outer wall of the cloth bag (103) falls off through the shrinkage and resetting of the cloth bag supporting frame;

2. The self-cleaning bag-type dust collector of claim 1, wherein the bag support comprises a fixing ring (101) and movable rods (104), a first fixing pipe (102) matched with the upper end of the bag (103) is fixedly installed at the lower end of the fixing ring (101), sliding chutes (112) which are uniformly distributed are formed in the lower end face of the fixing ring (101), the sliding chutes (112) are radially arranged along the fixing ring (101), the upper end of each movable rod (104) is connected with the fixing ring (101) through the corresponding sliding chute (112), annular air bags (110) which are uniformly distributed are fixedly connected between the movable rods (104), and the movable rods (104) are driven to move along the sliding chutes (112) through expansion or contraction of the annular air bags (110).

3. The self-cleaning bag-type dust collector of claim 2, wherein a second fixed pipe (105) is arranged at the upper end of the bag filtering mechanism (10), a fifth electromagnetic valve (113) communicated with the air outlet cavity is installed at the upper end of the second fixed pipe (105), a first air inlet pipe (106) is further connected to the side wall of the second fixed pipe (105), the air outlet of the first air inlet pipe (106) extends into the second fixed pipe (105), the outlet end of the first air inlet pipe (106) is connected with a second air inlet pipe (107) and a third air inlet pipe (114), the opening of the second air inlet pipe (107) is arranged downwards, a second electromagnetic valve (108) is installed on the second air inlet pipe (107), the opening of the third air inlet pipe (114) is communicated with the annular air bag (110), a third electromagnetic valve (109) is installed on the third air inlet pipe (114), and a fourth electromagnetic valve (111) for exhausting air is installed on the annular air bag (110).

4. The self-cleaning bag-type dust collector of claim 3, wherein the cross section of the movable rod (104) is arc-shaped, the movable rod (104) comprises an upper movable rod part (1041) and a lower movable rod part (1042), the inner wall of the lower movable rod part (1042) is fixedly connected with the outer wall of the upper movable rod part (1041), the upper end of the upper movable rod part (1041) is provided with a sliding block (1043) matched with the chute (112), and when the outer wall of the lower movable rod part (1042) is in contact with the bag (103), a gap exists between the outer wall of the upper movable rod part (1041) and the inner wall of the first fixed tube (102).

5. A self-cleaning bag-type dust collector in accordance with claim 3, wherein an air storage tank (7) is provided on the outer wall of said box body (1), said air storage tank (7) is connected to the first air inlet pipe (106) of each row through an air supply pipe (9), said air supply pipe (9) is installed with a first electromagnetic valve (8).

6. The self-cleaning bag-type dust collector of claim 5, wherein the control module comprises a detection module, a data transmission module and a processor, the processor is electrically connected to the first solenoid valve (8), the second solenoid valve (108), the third solenoid valve (109), the fourth solenoid valve (111) and the fifth solenoid valve (113), the detection module comprises a first pressure sensor arranged in the air inlet cavity, a second pressure sensor arranged in the air outlet cavity and a third pressure sensor arranged in the annular air bag (110), the air pressure value in the air inlet cavity and the air pressure value in the air outlet cavity are detected by the detection module, the air pressure value in the air inlet cavity and the air pressure value in the air outlet cavity are transmitted to the processor by the data transmission module, the processor calculates the air pressure difference between the air inlet cavity and the air outlet cavity, analyzes the variation of the air pressure difference, and controls the first solenoid valve (8), the second solenoid valve (108), the third solenoid valve (109), the fourth solenoid valve (111) and the fifth solenoid valve (113).

7. The self-cleaning bag-type dust collector of claim 6, wherein the self-cleaning bag-type dust collector comprises the following working steps:

step 1, connecting an air inlet (4) with a pipeline for conveying dust-containing air flow, connecting an air outlet pipe (5) with the inlet end of an induced draft fan, providing power for air flow flowing through the induced draft fan, and treating the dust-containing air flow through a cloth bag filtering mechanism (10);

step 3, after a proper cleaning mode is selected, cleaning the cloth bag (103) according to the set cleaning mode;

8. The self-cleaning bag-type dust collector of claim 7, wherein the cleaning manner in step 2 comprises pulse dust collection, moderate cleaning and deep cleaning;

the specific mode of pulse dust removal is as follows: the second electromagnetic valve (108) and the fifth electromagnetic valve (113) are in an open state, the third electromagnetic valve (109) and the fourth electromagnetic valve (111) are in a closed state, the first electromagnetic valve (8) is in an intermittent open state, and after the first electromagnetic valve (8) is opened, the corresponding second electromagnetic valve (108) discharges high-pressure airflow to perform pulse dust removal on the cloth bag (103);

the specific mode of moderate cleaning is as follows: the cloth bags (103) are grouped according to corresponding air supply pipes (9), each air supply pipe (9) corresponds to one group of cloth bags (103), one group is cleaned each time, other groups work normally when the group is cleaned, in the cleaning process, a third electromagnetic valve (109) is closed first, a fourth electromagnetic valve (111) is opened to release pressure of an annular air bag (110), the annular air bag (110) contracts in the pressure release process, a movable rod (104) gathers together along with the annular air bag (110), the cloth bags (103) can cling to the movable rod (104) under the action of the pressure difference between an air inlet cavity and an air outlet cavity, then a fifth electromagnetic valve (113) is closed, a first electromagnetic valve (8) and a second electromagnetic valve (108) are opened, the interior of the cloth bags (103) is inflated through a second air inlet pipe (107), the cloth bags (103) are inflated, the fourth electromagnetic valve (111) is closed, the third electromagnetic valve (109) is opened, the annular air bags (110) are rapidly inflated through a third air inlet pipe (114), the second electromagnetic valve (108) is closed, the movable rods (104) rapidly move outwards and impact on the inner walls of one group of the cloth bags (103) to clean the inner walls, dust on one group of the cloth bags (103), and then the group of the cloth bags (103) falls down;

the deep cleaning method comprises the following specific steps: grouping cloth bags (103) according to corresponding air supply pipes (9), each air supply pipe (9) corresponds to a group of cloth bags (103), clean a group at every time, when cleaning the group, other groups work normally, in the cleaning process, close third solenoid valve (109) earlier, open fourth solenoid valve (111) and carry out the pressure relief to annular air bag (110), the shrink takes place for annular air bag (110) among the pressure relief process, movable rod (104) are gathered together along with annular air bag (110), cloth bag (103) can be hugged closely movable rod (104) under the effect of air inlet cavity and air outlet cavity pressure difference, then close fifth solenoid valve (113), open first solenoid valve (8) and second solenoid valve (108), inflate cloth bag (103) inside through second air inlet pipe (107), blow cloth bag (103), close behind second solenoid valve (108), open third solenoid valve (109) fast, and close fourth solenoid valve (111), remove dust to outlet pipe (5) simultaneously, enter air pipe (114) through the third air inlet pipe, clean up a group of annular air bag (110) after blowing, blow up the outer wall of bag (104), fall down quick dust removal of cloth bag (103), and clean up a group of movable rod (103), and clean down cloth bag (103).

9. The self-cleaning bag-type dust collector of claim 8, wherein in step 2, an initial value of the air pressure difference is set to be P, and when the variation of P is less than or equal to 10%, moderate cleaning is adopted; when the P variation is more than 10% and less than or equal to 30%, deep cleaning is adopted; when the P variation is more than 30%, deep cleaning is adopted.

10. The self-cleaning bag-type dust collector of claim 9, wherein in step 2, the cleaning method of moderate cleaning or deep cleaning is adopted, and simultaneously pulse dust collection is carried out.