Self-cleaning cloth bag dust collector

Abstract

The application relates to the technical field of cloth bag dust collectors, in particular to a self-cleaning cloth bag dust collector which comprises a box body, a box cover and a cloth bag filtering mechanism, the upper end of the inner wall of the box body is fixedly installed with a horizontally arranged partition plate, the partition plate is provided with a mounting hole for mounting the cloth bag filtering mechanism, 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, in the device, the cloth bag cleaning mode can be automatically selected according to the pressure difference of the air inlet cavity and the air outlet cavity, when pulse dust removal is adopted, the cleaning effect is general and the energy consumption is low, when moderate cleaning is adopted, the cleaning effect is good and the energy consumption is general, when deep cleaning is adopted, the cleaning degree is thorough, but the wind pressure is reduced or additional energy consumption is caused during secondary dust removal, through reasonable selection of the cleaning mode, the use of energy can be effectively saved, and the cloth bag can be effectively cleaned.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cloth bag dust collector, and particularly relates to a self-cleaning cloth bag dust collector. BACKGROUND

[0002] The cloth bag dust collector is a device for separating dust from flue gas. The cloth bag dust collector is also called a filter type dust collector, and is a dry type high-efficiency dust collector. The cloth bag dust collector is a dust removal device for capturing solid particulate matters in dust-containing gas by using a bag filter element made of fiber fabric. The working principle is that dust particles are intercepted by colliding with fibers due to inertial force when passing through the fiber fabric.

[0003] The cloth bag composed of filter cloth accumulates dust on the outer wall during use. 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 removal mechanism is an important cloth bag cleaning mechanism in the cloth bag dust collector. The pulse dust removal mechanism removes the dust attached to the cloth bag by blowing compressed air. According to the size of the dust collector, there can be several groups of pulse valves. Each time a group of pulse valves is opened to remove the dust of the cloth bag controlled by it, and the other cloth bags work normally. After a period of time, the next group of pulse valves is opened to clean the next part of the cloth bag. During the use of the pulse dust removal mechanism, the cloth bag is deformed under the action of high-pressure airflow. After the high-pressure airflow stops supplying air, the cloth bag resets, and the cloth bag hits the cloth bag cage to vibrate, so that the dust falls off the cloth bag.

[0004] Since the mesh size of the cloth bag needs to be kept relatively constant, the filter cloth used to make the cloth bag is generally selected from non-elastic or low-elastic cloth, which causes the cloth bag to have a small deformation amount when the high-pressure airflow blows the cloth bag. The cloth bag has a small kinetic energy when the cloth bag restores the deformation, and the vibration amplitude of the cloth bag is generally small. The dust on the cloth bag is not easy to fall off, especially when the wind speed is large. The dust is pressed and bonded into a sheet shape and wrapped on the outside of the cloth bag. When the cloth bag vibrates, the sheet structure of the dust is not easy to be damaged. On the other hand, the dust stuck in the filter hole of the cloth bag is also difficult to fall off, which causes the cloth bag to be blocked after long-term use of the filter. The cloth bag needs to be cleaned deeply. During the deep cleaning process, the cloth bag generally needs to be taken down, which is complicated to operate and affects the production efficiency. SUMMARY

[0005] The present application aims at solving the problems in the prior art and provides a self-cleaning cloth bag dust collector.

[0006] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme:

[0007] The utility model provides a kind of self-cleaning cloth bag dust collector, including box, box cover and cloth bag filter mechanism, the upper end of the inner wall of the box is fixedly installed with horizontally arranged baffle, the baffle is opened with the mounting hole for installing the cloth bag filter mechanism, the area between box and box cover is divided into air inlet cavity and air outlet cavity by baffle, air inlet cavity is located below baffle, air inlet is provided on the side wall of box and is communicated with air inlet cavity, the upper end of the box is communicated with the air outlet pipe and is communicated with air outlet cavity, the cloth bag filter mechanism includes cloth bag and retractable cloth bag support frame, by the contraction and reset of cloth bag support frame, dust on the outer wall of cloth bag falls off;

[0008] It also includes a control module that automatically controls the contraction and reset of the cloth bag support frame.

[0009] Preferably, the cloth bag support frame includes a fixed ring and a movable rod, the lower end of the fixed ring is fixedly installed with a first fixed tube adapted to the upper end of the cloth bag, the lower end face of the fixed ring is provided with uniformly distributed sliding grooves arranged along the radial direction of the fixed ring, the upper end of the movable rod is connected to the fixed ring through the sliding grooves, and the movable rods are fixedly connected with uniformly distributed annular air bags, which are driven to move along the sliding grooves through expansion or contraction of the annular air bags.

[0010] Preferably, the upper end of the cloth bag filter mechanism is provided with a second fixed tube, the upper end of the second fixed tube is installed with a fifth electromagnetic valve communicated with the air outlet cavity, the side wall of the second fixed tube is further connected with a first air inlet pipe, the air outlet of the first air inlet pipe extends to the inside of the second fixed tube, the outlet end of the first air inlet pipe is connected with a second air inlet pipe and a third air inlet pipe, the opening of the second air inlet pipe is arranged downward, the second air inlet pipe is installed with a second electromagnetic valve, the opening of the third air inlet pipe is communicated with the annular air bag, the third air inlet pipe is installed with a third electromagnetic valve, and the annular air bag is installed with a fourth electromagnetic valve for exhaust.

[0011] Preferably, the cross section of the movable rod is arc-shaped, the movable rod includes a movable rod upper part and a movable rod lower part, the inner wall of the movable rod lower part is fixedly connected with the outer wall of the movable rod upper part, the upper end of the movable rod upper part is provided with a sliding block matched with the sliding groove, when the outer wall of the movable rod lower part contacts with the cloth bag, there is a gap between the outer wall of the movable rod upper part and the inner wall of the first fixed tube, and when the movable rod lower part props open the cloth bag, the movable rod upper part will not hit the inner wall of the first fixed tube.

[0012] Preferably, the outer wall of the box is provided with a gas storage tank, the gas storage tank is connected with the first air inlet pipe of each column through a gas supply pipe respectively, and the gas supply pipe is installed with a first electromagnetic valve.

[0013] Preferably, the control module comprises a detection module, a data transmission module and a processor, the processor is electrically connected with the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve, the fourth electromagnetic valve and the fifth electromagnetic valve respectively, 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, 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 data transmission module transmits the air pressure value in the air inlet cavity and the air pressure value in the air outlet cavity to the processor, the processor calculates the air pressure difference between the air inlet cavity and the air outlet cavity, analyzes the change amount of the air pressure difference, and controls the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve, the fourth electromagnetic valve and the fifth electromagnetic valve.

[0014] Preferably, the working steps of the self-cleaning cloth bag dust collector are as follows:

[0015] Step 1, connect the air inlet with the pipeline conveying the dust-containing gas flow, connect the air outlet pipe with the inlet end of the induced draft fan, provide the power for the gas flow by the induced draft fan, and process the dust-containing gas flow by the cloth bag filtering mechanism;

[0016] Step 2, detect the air pressure values in the air inlet cavity and the air outlet cavity by the detection module, analyze the change amount of the air pressure difference by the processor, compare and analyze, and select the appropriate cleaning mode;

[0017] Step 3, after selecting the appropriate cleaning mode, clean the cloth bag according to the set cleaning mode;

[0018] Step 4, during the cleaning process, continuously detect the air pressure values in the air inlet cavity and the air outlet cavity by the detection module, and stop cleaning when the change amount of the air pressure difference returns to the preset value.

[0019] Preferably, the cleaning mode in step 2 comprises pulse dust removal, moderate cleaning and deep cleaning;

[0020] Preferably, the specific mode of pulse dust removal is that the second electromagnetic valve and the fifth electromagnetic valve are in the open state, the third electromagnetic valve and the fourth electromagnetic valve are in the closed state, and the first electromagnetic valve is in the intermittent open state, when the first electromagnetic valve is opened, the corresponding second electromagnetic valve discharges high-pressure gas flow to pulse dust removal of the cloth bag;

[0021] Preferably, the specific way of moderate cleaning is that: the cloth bags are grouped according to corresponding air supply pipes, each air supply pipe corresponds to a group of cloth bags, one group is cleaned each time, when the group is cleaned, the other groups work normally, during the cleaning process, the third electromagnetic valve is closed first, the fourth electromagnetic valve is opened to depressurize the annular air bag, the annular air bag shrinks during the depressurization process, the movable rod gathers with the annular air bag, the cloth bags are tightly attached to the movable rod under the action of the pressure difference between the air inlet cavity and the 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 by air through the second air inlet pipe, the annular air bag is rapidly inflated by air through the third air inlet pipe after the fourth electromagnetic valve is closed and the third electromagnetic valve is opened, the second electromagnetic valve is closed, the movable rod moves outward rapidly and hits the inner wall of the cloth bag to make the dust on the cloth bag fall off, after one group is cleaned, the next group is cleaned.

[0022] Preferably, the specific way of deep cleaning is that: the cloth bags are grouped according to corresponding air supply pipes, each air supply pipe corresponds to a group of cloth bags, one group is cleaned each time, when the group is cleaned, the other groups work normally, during the cleaning process, the third electromagnetic valve is closed first, the fourth electromagnetic valve is opened to depressurize the annular air bag, the annular air bag shrinks during the depressurization process, the movable rod gathers with the annular air bag, the cloth bags are tightly attached to the movable rod under the action of the pressure difference between the air inlet cavity and the 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 by air through the second air inlet pipe, the annular air bag is rapidly inflated by air through the third air inlet pipe after the fourth electromagnetic valve is closed and the third electromagnetic valve is opened, the second electromagnetic valve is closed, the movable rod moves outward rapidly and hits the inner wall of the cloth bag to make the dust on the cloth bag fall off, after one group is cleaned, the next group is cleaned.

[0023] Preferably, in step 2, the initial value of the air pressure difference is P, when the P variation is less than or equal to 10%, moderate cleaning is adopted, when the P variation is greater than 10% and less than or equal to 30%, deep cleaning is adopted, and when the P variation is greater than 30%, deep cleaning is adopted.

[0024] Preferably, in step 2, the cleaning mode of moderate cleaning or deep cleaning is adopted at the same time, and pulse dust removal is carried out at the same time.

[0025] The beneficial effects of the present application are:

[0026] 1、In the device, the cloth bag filtering mechanism provided with the retractable cloth bag support frame, when the cloth bags in the cloth bag filtering mechanism accumulate more dust, the cloth bag support frame is controlled to retract, the cloth bags follow the cloth bag support frame to retract under the action of the pressure difference between the air inlet cavity and the air outlet cavity, the deformation amount of the cloth bags is large, the dust follows the cloth bags to retract, and the dust is stacked and extruded, thereby effectively removing the dust accumulated on the cloth bags.

[0027] 2. In this device, when using medium or deep cleaning, some dust remains on the filter bags after they shrink. During the bag recovery process, air is first inflated into the filter bags through the second air inlet pipe, and then the annular airbag is rapidly inflated through the third air inlet pipe. The moving rod moves rapidly outward and impacts the inner wall of the filter bag, causing the filter bag to vibrate violently. The moving rod then bounces the dust off the outer wall of the filter bag. After one set of cleaning is completed, the next set is cleaned. The bag filter can operate normally during the entire cleaning process without needing to stop for cleaning, effectively improving the operating efficiency of the device.

[0028] 3. In this device, when deep cleaning is performed, after the filter bag is inflated, the second solenoid valve is closed and the third solenoid valve is quickly opened. Because the filter bag is covered with micropores, the filter bag begins to slowly contract as the annular airbag expands. When the movable rod contacts the filter bag, the filter bag is no longer at its maximum unfolded area. After the movable rod hits the filter bag, it pushes the filter bag to continue moving outward a short distance. A small amount of dust in the filter bag's filter holes is pushed into the filter bag's interior under inertia, achieving deep cleaning of the filter bag. During the deep cleaning process, the gas discharged from the exhaust pipe needs to be subjected to secondary dust removal to reduce dust pollution to the environment.

[0029] 4. In this device, the bag cleaning method can be automatically selected according to the pressure difference between the air inlet and outlet chambers. When pulse dust removal is used, the cleaning effect is average and the energy consumption is low. When medium cleaning is used, the cleaning effect is good and the energy consumption is average. When deep cleaning is used, the cleaning degree is thorough, but the air pressure will be reduced or additional energy consumption will be caused during secondary dust removal. By reasonably selecting the cleaning method, energy can be effectively saved, while ensuring that the bag can be effectively cleaned. Attached Figure Description

[0030] Figure 1 This is a three-dimensional structural diagram of a self-cleaning bag filter dust collector with a lid removed, as proposed in this invention.

[0031] Figure 2 This is a schematic diagram of the main structure of the bag filter mechanism of a self-cleaning bag dust collector proposed in this invention.

[0032] Figure 3 This is a schematic diagram of the main structure of the bag filter mechanism of a self-cleaning bag dust collector according to the present invention, showing the removal of the fifth solenoid valve.

[0033] Figure 4 This invention proposes a self-cleaning bag filter. Figure 3 A schematic diagram of the cross-sectional structure;

[0034] Figure 5 This invention proposes a self-cleaning bag filter. Figure 3 A schematic diagram of the structure viewed from below;

[0035] Figure 6 A side view structural schematic diagram of a movable rod of a self-cleaning cloth bag dust collector according to the present application;

[0036] Figure 7 A perspective structural schematic diagram of a movable rod of a self-cleaning cloth bag dust collector according to the present application;

[0037] Figure 8 A cross-sectional structural schematic diagram of a movable rod of a self-cleaning cloth bag dust collector according to the present application Figure 1 ;

[0038] Figure 9 A cross-sectional structural schematic diagram of a movable rod of a self-cleaning cloth bag dust collector according to the present application Figure 2 ;

[0039] Figure 10 A front view structural schematic diagram of a movable rod of a self-cleaning cloth bag dust collector according to the present application;

[0040] Figure 11 A front view structural schematic diagram of a self-cleaning cloth bag dust collector according to the present application;

[0041] Figure 12 A perspective structural schematic diagram of a self-cleaning cloth bag dust collector according to the present application, in which the box cover and the cloth bag filtering mechanism are removed.

[0042] In the figure: 1 box body, 2 hopper, 3 partition plate, 4 air inlet, 5 air outlet pipe, 6 box cover, 7 gas storage tank, 8 first electromagnetic valve, 9 gas supply pipe, 10 cloth bag filtering mechanism, 31 mounting hole, 61 cover plate, 101 fixed ring, 102 first fixed pipe, 103 cloth bag, 104 movable rod, 105 second fixed pipe, 106 first air inlet pipe, 107 second air inlet pipe, 108 second electromagnetic valve, 109 third electromagnetic valve, 110 annular air bag, 111 fourth electromagnetic valve, 112 sliding groove, 113 fifth electromagnetic valve, 114 third air inlet pipe, 1041 upper part of movable rod, 1042 lower part of movable rod, 1043 sliding block, 1044 gas passage, 1045 convex strip, 1046 clasp ring. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application.

[0044] In the present embodiment, reference is made to Figures 1-12The utility model provides a self -cleaning formula cloth bag dust catcher, including box 1, box cover 6 and cloth bag filter mechanism 10, the upper end of box 1 inner wall is fixedly installed with the horizontally arranged baffle 3, install the mounting hole 31 of cloth bag filter mechanism 10 for setting up on baffle 3, the area between box 1 and box cover 6 is divided into air inlet chamber and air outlet chamber through baffle 3, air inlet chamber is located below baffle 3, and the lateral wall of box 1 is provided with the air inlet 4 of communication with air inlet chamber, and the upper end of box 1 is connected with the air outlet pipe 5 of communication with air outlet chamber, and the lower end of box 1 is installed with hopper 2, cloth bag filter mechanism 10 includes cloth bag 103 and the collapsible cloth bag support frame, through the contraction and reset of cloth bag support frame, make the dust on the outer wall of cloth bag 103 fall off, and the upper end of box cover 6 is installed with a plurality of cover plates 61 through screw, open cover plate 61, can carry out small -range overhaul to the inside of air inlet chamber, open whole box cover 6, can carry out large -range overhaul to the inside of air inlet chamber,

[0045] Still include control module, through the contraction and reset of cloth bag support frame of control module automatic control.

[0046] The cloth bag support frame includes a fixed ring 101 and a movable rod 104, a first fixed tube 102 adapted to the upper end of the cloth bag 103 is fixedly installed at the lower end of the fixed ring 101, and a plurality of sliding grooves 112 are evenly arranged on the lower end surface of the fixed ring 101 and are arranged along the radial direction of the fixed ring 101. The upper end of the movable rod 104 is connected with the fixed ring 101 through the sliding grooves 112, and a plurality of annular air bags 110 are fixedly connected between the movable rods 104. The annular air bags 110 are expanded or contracted to drive the movable rods 104 to move along the sliding grooves 112.

[0047] A second fixed tube 105 is arranged at the upper end of the cloth bag filter mechanism 10, a fifth electromagnetic valve 113 communicating with the air outlet chamber is installed at the upper end of the second fixed tube 105, a first air inlet pipe 106 is further connected to the side wall of the second fixed tube 105, the air outlet of the first air inlet pipe 106 extends to the inside of the second fixed tube 105, a second air inlet pipe 107 and a third air inlet pipe 114 are connected to the outlet end of the first air inlet pipe 106, the opening of the second air inlet pipe 107 is arranged downward, a second electromagnetic valve 108 is installed on the second air inlet pipe 107, the opening of the third air inlet pipe 114 communicates with the annular air bag 110, a third electromagnetic valve 109 is installed on the third air inlet pipe 114, and the third air inlet pipe 114 is a flexible pipe. A fourth electromagnetic valve 111 for exhaust is installed on the annular air bag 110.

[0048] The cross section of the movable rod 104 is arc-shaped, and the movable rod 104 comprises a movable rod upper portion 1041 and a movable rod lower portion 1042, the inner wall of the movable rod lower portion 1042 is fixedly connected with the outer wall of the movable rod upper portion 1041, and the upper end of the movable rod upper portion 1041 is provided with a sliding block 1043 matched with the sliding groove 112, the sliding block 1043 is a dovetail sliding groove, and when the outer wall of the movable rod lower portion 1042 is in contact with the cloth bag 103, a gap exists between the outer wall of the movable rod upper portion 1041 and the inner wall of the first fixed tube 102.

[0049] In order to facilitate the air supply of the annular air bag 110, as shown in the drawings, the inner wall of the movable rod lower portion 1042 is provided with a clasp 1046 through which the third air inlet pipe 114 passes; Figure 10

[0050] As shown in the drawings, the movable rod lower portion 1042 is provided with a gas passage 1044, one end of the third air inlet pipe 114 is connected with the gas passage 1044, and the other end of the gas passage 1044 is connected with the air inlet of the annular air bag 110. Figure 8

[0051] As shown in the drawings, the inner part of the convex strip 1045 is provided with a gas passage 1044, one end of the third air inlet pipe 114 is connected with the gas passage 1044, and the other end of the gas passage 1044 is connected with the air inlet of the annular air bag 110. Figure 9

[0052] The outer wall of the box body 1 is provided with a gas storage tank 7, the gas storage tank 7 is connected with the first air inlet pipe 106 of each column through a gas supply pipe 9, and the first electromagnetic valve 8 is installed on the gas supply pipe 9.

[0053] The control module comprises a detection module, a data transmission module and a processor, the processor is 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 data transmission module transmits the air pressure value in the air inlet cavity and the air pressure value in the air outlet cavity to the processor, the processor calculates the air pressure difference between the air inlet cavity and the air outlet cavity, analyzes the change amount 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. ​​​

[0054] The working steps of the self-cleaning cloth bag dust collector are:

[0055] Step 1, connect the air inlet 4 with the pipeline conveying the dust-containing airflow, and connect the air outlet pipe 5 with the inlet end of the induced draft fan, provide the power for the airflow flow through the induced draft fan, and process the dust-containing airflow through the cloth bag filtering mechanism 10;

[0056] Step 2, detect the air pressure values in the air inlet cavity and the air outlet cavity through the detection module, analyze the change amount of the air pressure difference by the processor, analyze and compare, and select the appropriate cleaning method;

[0057] Step 3, after selecting the appropriate cleaning method, clean the cloth bag 103 according to the set cleaning method;

[0058] Step 4, during the cleaning process, continuously detect the air pressure values in the air inlet cavity and the air outlet cavity through the detection module, and stop cleaning when the change amount of the air pressure difference returns to the preset value.

[0059] The cleaning method in step 2 includes pulse dust removal, moderate cleaning and deep cleaning;

[0060] The specific method of pulse dust removal is that the second electromagnetic valve 108 and the fifth electromagnetic valve 113 are in the open state, the third electromagnetic valve 109 and the fourth electromagnetic valve 111 are in the closed state, and the first electromagnetic valve 8 is in the intermittent open state. When the first electromagnetic valve 8 is opened, the corresponding second electromagnetic valve 108 discharges high-pressure airflow to pulse dust removal of the cloth bag 103;

[0061] The specific method of moderate cleaning is that the cloth bag 103 is grouped according to the corresponding air supply pipe 9, each air supply pipe 9 corresponds to a group of cloth bags 103, and each time a group is cleaned, the other groups work normally. During the cleaning process, first close the third electromagnetic valve 109, open the fourth electromagnetic valve 111 to release the pressure of the annular air bag 110, and the annular air bag 110 shrinks during the pressure release process. The movable rod 104 follows the annular air bag 110 to gather, and the cloth bag 103 will tightly adhere to the movable rod 104 under the action of the pressure difference between the air inlet cavity and the air outlet cavity. Then close the fifth electromagnetic valve 113, open the first electromagnetic valve 8 and the second electromagnetic valve 108, inflate the cloth bag 103 through the second air inlet pipe 107, blow up the cloth bag 103, close the fourth electromagnetic valve 111, open the third electromagnetic valve 109, and quickly inflate the annular air bag 110 through the third air inlet pipe 114. Close the second electromagnetic valve 108, the movable rod 104 quickly moves outward and hits the inner wall of the cloth bag 103, and the dust on the cloth bag 103 is bounced off, and the next group is cleaned after one group is cleaned;

[0062] The specific way of deep cleaning is: grouping the cloth bags 103 according to the corresponding air supply pipes 9, each air supply pipe 9 corresponding to a group of cloth bags 103, cleaning one group at a time, while the other groups are working normally. During the cleaning process, first close the third electromagnetic valve 109, open the fourth electromagnetic valve 111 to depressurize the annular air bag 110. During the depressurization process, the annular air bag 110 shrinks, the movable rod 104 follows the annular air bag 110 and gathers, and the cloth bag 103 is tightly attached to the movable rod 104 under the action of the pressure difference between the inlet and outlet chambers. Then close the fifth electromagnetic valve 113, open the first electromagnetic valve 8 and the second electromagnetic valve 108, and inflate the cloth bag 103 by the second inlet pipe 107 to inflate the cloth bag 103. After closing the second electromagnetic valve 108, quickly open the third electromagnetic valve 109 and close the fourth electromagnetic valve 111, and at the same time, dust the gas discharged from the outlet pipe 5. The annular air bag 110 is quickly inflated by the third inlet pipe 114, the movable rod 104 quickly moves outward and hits the inner wall of the cloth bag 103, and the dust on the cloth bag 103 is bounced off. After one group is cleaned, the next group is cleaned.

[0063] The dust on the gas discharged from the outlet pipe 5 can be removed by a filter screen, that is, the outlet end of the induced draft fan is provided with two pipes, one pipe is directly vented, and the other pipe is vented after passing through the filter screen. By automatically controlling the valve to freely switch between the two pipes, only during deep cleaning, the gas discharged from the outlet pipe 5 needs to pass through the filter screen.

[0064] The dust on the gas discharged from the outlet pipe 5 can be removed by a dust remover, such as an electrostatic precipitator. During deep cleaning, keep the dust remover open, and at other times, keep the filter closed.

[0065] During the deep cleaning process, using a filter screen to treat the tail gas will cause the wind pressure to drop, and using an electrostatic precipitator will consume part of the energy.

[0066] In step 2, when the change amount of P is less than or equal to 10%, moderate cleaning is adopted; when the change amount of P is greater than 10% and less than or equal to 30%, deep cleaning is adopted; and when the change amount of P is greater than 30%, deep cleaning is adopted.

[0067] In step 2, pulse dust removal is performed at the same time when moderate cleaning or deep cleaning is adopted.

[0068] In the device, a cloth bag filter mechanism with a retractable cloth bag support frame is provided. When the cloth bag 103 in the cloth bag filter mechanism accumulates a lot of dust, the cloth bag support frame is controlled to retract, and the cloth bag 103 follows the cloth bag support frame to retract under the action of the pressure difference between the inlet and outlet chambers. The cloth bag 103 deforms greatly, and the dust is removed from the cloth bag by being stacked and pressed together while the cloth bag 103 retracts.

[0069] In the device, when moderate cleaning or deep cleaning is adopted, part of the dust remains on the cloth bag 103 after the cloth bag 103 is contracted, and during the recovery process of the cloth bag 103, the cloth bag 103 is inflated by the second air inlet pipe 107, the cloth bag 103 is inflated, the annular air bag 110 is rapidly inflated by the third air inlet pipe 114, the movable rod 104 moves outward rapidly and hits the inner wall of the cloth bag 103, the cloth bag 103 vibrates violently, the dust on the outer wall of the cloth bag 103 is bounced off by the movable rod 104, and the next group is cleaned after one group is cleaned, and during the whole cleaning process, the bag dust collector can operate normally without stopping for cleaning, thereby effectively improving the operation efficiency of the device.

[0070] In the device, when deep cleaning is adopted, the cloth bag 103 is inflated, the second electromagnetic valve 108 is closed and the third electromagnetic valve 109 is rapidly opened (the interval time is 1s-3s), the cloth bag is covered with micropores, the annular air bag 110 expands, and the cloth bag 103 starts to contract slowly, when the movable rod 104 contacts the cloth bag, the cloth bag 103 is not at the maximum expansion area, the movable rod 104 hits the cloth bag, and pushes the cloth bag 103 to move outward by a small distance, and a small amount of dust in the filter hole of the cloth bag 103 is pushed into the inside of the cloth bag 103 under the action of inertia, thereby realizing deep cleaning of the cloth bag 103, and the gas discharged from the gas outlet pipe 5 needs to be dedusted again during the deep cleaning process, thereby reducing the pollution of dust to the environment.

[0071] In the device, the cloth bag cleaning mode can be automatically selected according to the pressure difference between the air inlet cavity and the air outlet cavity, when pulse dust removal is adopted, the cleaning effect is general and the energy consumption is low, when moderate cleaning is adopted, the cleaning effect is good and the energy consumption is general, and when deep cleaning is adopted, the cleaning degree is complete, but the wind pressure is reduced or additional energy consumption is caused during secondary dust removal, through reasonable selection of the cleaning mode, the use of energy can be effectively saved, and the cloth bag can be effectively cleaned.

[0072] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A self-cleaning cloth bag dust collector, comprising a box body (1), a box cover (6) and a cloth bag filtering mechanism (10), the upper end of the inner wall of the box body (1) is fixedly provided with a horizontally arranged partition plate (3), the partition plate (3) is provided with a mounting hole (31) for mounting the cloth bag filtering mechanism (10), the area between the box body (1) and the box cover (6) is divided into an air inlet cavity and an air outlet cavity by the partition plate (3), the air inlet cavity is located below the partition plate (3), the sidewall of the box body (1) is provided with an air inlet (4) communicating with the air inlet cavity, and the box body (1) is communicated with an air outlet pipe (5) communicating with the air outlet cavity. The cloth bag filtering mechanism (10) comprises a cloth bag (103) and a retractable cloth bag support frame, and through contraction and resetting of the cloth bag support frame, dust on the outer wall of the cloth bag (103) is caused to fall off; A control module is further included, and contraction and resetting of the cloth bag support frame are automatically controlled through the control module; The cloth bag support frame comprises a fixed ring (101) and movable rods (104), a first fixed tube (102) compatible with the upper end of the cloth bag (103) is fixedly installed at the lower end of the fixed ring (101), uniformly distributed sliding grooves (112) are formed in the lower end surface of the fixed ring (101), the sliding grooves (112) are arranged along the radial direction of the fixed ring (101), the upper ends of the movable rods (104) are connected with the fixed ring (101) through the sliding grooves (112), and uniformly distributed annular air bags (110) 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).

2. The self-cleaning bag filter according to claim 1, wherein The upper end of the cloth bag filtering mechanism (10) is provided with a second fixed tube (105), the upper end of the second fixed tube (105) is provided with a fifth electromagnetic valve (113) in communication with an air outlet cavity, a first air inlet tube (106) is further connected to the side wall of the second fixed tube (105), the air outlet of the first air inlet tube (106) extends to the inside of the second fixed tube (105), a second air inlet tube (107) and a third air inlet tube (114) are connected to the outlet end of the first air inlet tube (106), the opening of the second air inlet tube (107) is arranged downward, the second air inlet tube (107) is provided with a second electromagnetic valve (108), the opening of the third air inlet tube (114) is in communication with the annular air bag (110), the third air inlet tube (114) is provided with a third electromagnetic valve (109), and the annular air bag (110) is provided with a fourth electromagnetic valve (111) for exhaust.

3. The self-cleaning bag filter according to claim 2, wherein The movable rods (104) are in circular arc shape in cross section, the movable rods (104) comprise movable rod upper portions (1041) and movable rod lower portions (1042), the inner wall of the movable rod lower portions (1042) is fixedly connected with the outer wall of the movable rod upper portions (1041), the upper end of the movable rod upper portions (1041) is provided with a sliding block (1043) compatible with the sliding grooves (112), and when the outer wall of the movable rod lower portions (1042) is in contact with the cloth bag (103), a gap exists between the outer wall of the movable rod upper portions (1041) and the inner wall of the first fixed tube (102).

4. The self-cleaning bag filter according to claim 2, wherein An air storage tank (7) is arranged on the outer wall of the box body (1), the air storage tank (7) is connected with the first air inlet tube (106) of each column through a gas supply pipe (9), and the gas supply pipe (9) is provided with a first electromagnetic valve (8).

5. The self-cleaning baghouse of claim 4, wherein, The control module comprises a detection module, a data transmission module and a processor, the processor is 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 data transmission module transmits the air pressure value in the air inlet cavity and the air pressure value in the air outlet cavity to the processor, the processor calculates the air pressure difference between the air inlet cavity and the air outlet cavity, analyzes the change amount 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).

6. The self-cleaning baghouse of claim 5, wherein, The working steps of the self-cleaning cloth bag dust collector are as follows: Step 1, connect the air inlet (4) with the pipeline conveying dust-containing gas flow, connect the air outlet pipe (5) with the inlet end of the induced draft fan, provide the power of gas flow by the induced draft fan, and process the dust-containing gas flow by the cloth bag filtering mechanism (10); Step 2, detect the air pressure values in the air inlet cavity and the air outlet cavity by the detection module, analyze the change amount of the air pressure difference by the processor, compare and analyze, and select the appropriate cleaning mode; Step 3, after selecting the appropriate cleaning mode, clean the cloth bag (103) according to the set cleaning mode; Step 4, during the cleaning process, continuously detect the air pressure values in the air inlet cavity and the air outlet cavity by the detection module, and stop cleaning when the change amount of the air pressure difference returns to the preset value.

7. The self-cleaning baghouse of claim 6, wherein, The cleaning mode in step 2 comprises pulse dust removal, moderate cleaning and deep cleaning; The specific mode of pulse dust removal is that the second electromagnetic valve (108) and the fifth electromagnetic valve (113) are in the open state, the third electromagnetic valve (109) and the fourth electromagnetic valve (111) are in the closed state, and the first electromagnetic valve (8) is in the intermittent open state, when the first electromagnetic valve (8) is opened, the corresponding second electromagnetic valve (108) discharges high-pressure gas flow to pulse dust the cloth bag (103). The specific way of moderate cleaning is that: the cloth bags (103) are grouped according to the corresponding air supply pipes (9), each air supply pipe (9) corresponds to a group of cloth bags (103), one group is cleaned each time, when the group is cleaned, the other groups work normally, during the cleaning process, the third electromagnetic valve (109) is closed first, the fourth electromagnetic valve (111) is opened to depressurize the annular air bag (110), the annular air bag (110) shrinks during the depressurization process, the movable rod (104) follows the annular air bag (110) to gather, the cloth bags (103) will be close to the movable rod (104) under the action of the pressure difference between the inlet chamber and the outlet chamber, 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 by inflating the inside of the cloth bags (103) through the second inlet pipe (107), the fourth electromagnetic valve (111) is closed, the third electromagnetic valve (109) is opened, the annular air bag (110) is rapidly inflated through the third inlet pipe (114), the second electromagnetic valve (108) is closed, the movable rod (104) moves outward quickly and hits the inner wall of the cloth bag (103), the dust on the cloth bag (103) is bounced off, after one group is cleaned, the next group is cleaned; The specific way of deep cleaning is that: the cloth bags (103) are grouped according to the corresponding air supply pipes (9), each air supply pipe (9) corresponds to a group of cloth bags (103), one group is cleaned each time, when the group is cleaned, the other groups work normally, during the cleaning process, the third electromagnetic valve (109) is closed first, the fourth electromagnetic valve (111) is opened to depressurize the annular air bag (110), the annular air bag (110) shrinks during the depressurization process, the movable rod (104) follows the annular air bag (110) to gather, the cloth bags (103) will be close to the movable rod (104) under the action of the pressure difference between the inlet chamber and the outlet chamber, 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 by inflating the inside of the cloth bags (103) through the second inlet pipe (107), the fourth electromagnetic valve (111) is closed, the third electromagnetic valve (109) is opened, the annular air bag (110) is rapidly inflated through the third inlet pipe (114), the second electromagnetic valve (108) is closed, the movable rod (104) moves outward quickly and hits the inner wall of the cloth bag (103), the dust on the cloth bag (103) is bounced off, after one group is cleaned, the next group is cleaned.

8. The self-cleaning baghouse of claim 7, wherein, In step 2, when the change amount of the air pressure difference is less than or equal to 10%, moderate cleaning is adopted; when the change amount of the air pressure difference is greater than 10% and less than or equal to 30%, deep cleaning is adopted; when the change amount of the air pressure difference is greater than 30%, deep cleaning is adopted.

9. The self-cleaning baghouse of claim 8, wherein, In step 2, the cleaning mode of moderate cleaning or deep cleaning is used at the same time, and pulse dust removal is carried out at the same time.

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