Flue gas dust removal equipment and method for low-rank coal calcination

Abstract

The invention relates to the field of flue gas dust removal, and discloses flue gas dust removal equipment for low-rank coal calcination and a method thereof.The flue gas dust removal equipment comprises a bottom plate and a dust removal cylinder, mounting plates are fastened to the left side and the right side of the upper face of the bottom plate through bolts, the dust removal cylinder fixedly penetrates through the two mounting plates, and a fixing plate is mounted on the upper portion of the inner wall of the dust removal cylinder; the lower surface of the fixing plate is a concave arc-shaped surface, flushing cylinders are installed at the two ends of the dust removal cylinder, flushing structures are arranged on the flushing cylinders, and when a filter cotton net in the dust removal cylinder is used for a long time and needs to be flushed, the dust removal structure in the dust removal cylinder can be automatically moved into one of the flushing cylinders; the dust removal structure in the other washing barrel moves in the dust removal barrel, when the dust removal structures are subjected to dust removal, normal dust removal work can be guaranteed, the working efficiency is improved, sewage generated after washing is accumulated in the washing barrels and cannot enter the dust removal barrels, and therefore the washing work quality is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of flue gas dust removal, and in particular to a flue gas dust removal device and method for calcining low-rank coal. Background Art

[0002] Low-rank coal is a type of coal that has a long flame and smoke when burning, and has a low degree of coalification; the appearance is gray-black to black, and the powder is brown to black; it is composed of shiny and matte parts that are combined into layers, and has asphalt, grease, glass, metal, diamond and other lusters, with obvious striped and convex mirror structures. Low-priced coal will produce smoke, and dust removal equipment is needed to remove the generated smoke; The flue gas dust removal equipment in the prior art, by setting a dust removal mechanism, uses a motor to drive the shaft to rotate, and then drives the dust removal frame on the surface of the rotating shaft to rotate, so that the filter cotton net brings the dust floating inside the dust removal device into the water inside the dust removal box, and by setting a backwash mechanism, uses a high-pressure nozzle to spray water in the water inlet pipe to the back side of the filter cotton net to wash the filter cotton net, and finally the dust is concentrated in the water, and then the sewage with a large amount of dust is discharged through the sewage pipe, so that the dust inside the dust removal device is effectively discharged, and the filter cotton net is prevented from being blocked, thereby improving the dust removal efficiency of the dust removal device; However, when the filter cotton mesh is flushed through a high-pressure nozzle, the dust flushed out of the filter cotton mesh is brought into the water in the dust removal box. As the filter cotton mesh rotates in the sewage in the dust removal box, the flushed dust will be brought back to the filter cotton mesh, thus reducing the flushing effect of the filter cotton mesh and the dust removal quality of the filter cotton mesh. Summary of the invention

[0003] In order to solve the problems raised in the above background technology, the present invention provides a flue gas dust removal device and method for low-rank coal calcination.

[0004] In the first aspect, the present invention provides a flue gas dust removal device for low-rank coal calcination, which adopts the following technical solution: A flue gas dust removal device for low-rank coal calcination, comprising a base plate and a dust removal cylinder, wherein mounting plates are fastened with bolts on the left and right sides of the base plate, and dust removal cylinders are fixedly passed through the two mounting plates, and a fixing plate is installed above the inner wall of the dust removal cylinder, and the lower side of the fixing plate is a concave arc surface, and a flushing cylinder is installed at both ends of the dust removal cylinder, and a flushing structure is provided on the flushing cylinder, and two groups of dust removal structures are provided in the dust removal cylinder and the flushing cylinder on the right, and an air intake pipe is connected in the middle of the side surface of the dust removal cylinder, and an exhaust pipe is connected at a position of the middle of the side surface of the dust removal cylinder away from the air intake pipe, and a water supply pipe is connected to a position of the dust removal cylinder close to the air intake pipe, and a sewage discharge structure is provided on the dust removal cylinder and the flushing cylinder, and a driving structure is provided on the flushing cylinder on the left; The two groups of dust removal structures include two rotating rods in the dust removal cylinder and one of the flushing cylinders, three sealing discs are arranged on the two rotating rods, one of which is connected to one end of the two rotating rods close to each other, and the other two sealing discs are installed at one end of the two rotating rods away from each other. A through hole is opened in the middle of the left and right sides of the dust removal cylinder, and the two sealing discs are tightly inserted in the two through holes. The outer diameter of the sealing disc is the same as the inner diameter of the through hole, and the edges of the left and right sides of the sealing disc in the middle are opened An annular groove is provided, and an annular groove is opened at the edge of one side of the two sealing plates at both ends close to each other. A plurality of filter cotton nets are arranged on the side of each rotating rod through a closing structure, and the end of the filter cotton net away from the rotating rod is connected to the middle of the inner wall of the arc plate. The thickness of the arc plate is the same as the depth of the annular groove. Multiple arc plates can be closed to form a complete cylinder. A cylinder is installed in the middle of the side of the flushing cylinder away from the dust removal cylinder on the right side, and one end of the cylinder output shaft is rotatably connected to the corresponding sealing disk.

[0005] Preferably, the closing structure includes a plurality of grooves provided on the wall of each annular groove, the plurality of grooves being distributed at equal angles on the circumference of the sealing disk, a rotating shaft being rotatably connected between the groove walls on both sides of each groove, a folding plate being fixedly sleeved at one end of each rotating shaft, a curved plate being rotatably connected to the end of the folding plate away from the rotating shaft, one end of the curved plate being rotatably connected to the inner wall of the arc-shaped plate, the side surface of the filter cotton net being connected to the curved plate and the folding plate, and a driving structure being arranged in the rotating rod and the sealing disk.

[0006] Preferably, the driving structure includes a first inner groove opened in each rotating rod, a second inner groove opened in the two sealing disks at both ends, a through groove opened on the sealing disk in the middle, the through groove connecting the two first inner grooves, a first motor is installed in one of the second inner grooves, a bidirectional screw is arranged in the two rotating rods, the two bidirectional screws are connected to each other, one end of the output shaft of the first motor is connected to one end of the corresponding bidirectional screw, the left and right sections of the thread on each bidirectional screw have opposite directions, a movable sleeve is sleeved near both ends of each bidirectional screw, a thread for the bidirectional screw to pass through is arranged on the inner wall of the movable sleeve, a driving strip is fixedly embedded at the position of each rotating shaft on the side surface of each movable sleeve, a gear is fixedly sleeved in the middle of each rotating shaft, the driving strip is provided with teeth meshing with the gear, a limiting rod is movably passed through the through holes on the plurality of movable sleeves, and the two ends of the limiting rod are fixedly connected to the inner walls of the sealing disks at both ends.

[0007] Preferably, the driving structure includes a second motor installed in the middle of the left side surface of the left flushing cylinder, and a turntable is rotatably installed in the middle of the left inner wall of the left flushing cylinder. One end of the output shaft of the second motor is fixedly connected to the turntable, and a plurality of telescopic rods are connected to the edge of one side of the turntable, and one end of the telescopic rod is connected to the corresponding sealing disk.

[0008] Preferably, the flushing structure includes water supply pipes fixedly inserted into the upper middle part of the two flushing cylinders, one end of the water supply pipe inserted into the flushing cylinder is connected to a flushing pipe, the flushing pipe is fixedly installed at the upper part of the flushing cylinder, a plurality of flushing heads are installed at the bottom of the flushing pipe, and water storage tanks are fixedly installed on the two mounting plates, water pumps are installed on the left and right sides of the water storage tank, and the water pump is connected to the other end of the water supply pipe.

[0009] Preferably, the sewage discharge structure includes a first sewage discharge pipe respectively connected to the lower middle part of the two flushing cylinders, a second sewage discharge pipe is connected to the lower middle part of the dust removal cylinder, one end of the first sewage discharge pipe and the second sewage discharge pipe are connected to a connecting box, an upper pipe is connected to the middle part of the bottom of the connecting box, a lower pipe is arranged directly below the upper pipe, the bottom end of the lower pipe is connected to the top of the water tank, the upper pipe and the lower pipe are connected by a connecting plate, a switching space is left between the upper pipe and the lower pipe, and a switching structure is arranged on the top of the water tank near the lower pipe.

[0010] Preferably, the switching structure includes a switching column rotatably mounted on the water tank near the lower tube, a switching plate is mounted on the top of the switching column, and spliced ​​filtering structures are provided at both ends of the switching plate.

[0011] Preferably, the spliced ​​filtering structure includes an intermediate sleeve fixedly connected to both ends of the switching plate, a connecting pipe is fixedly passed through the intermediate sleeve, the connecting pipe is in an "H" shape, a filter cartridge is placed on a support ring on the inner wall of the connecting pipe near the bottom end, a filter screen is installed under the filter cartridge, sealing sleeves are movable at the upper and lower ends of the connecting pipe, a plurality of springs are connected between the sealing sleeve and the intermediate sleeve, sealing grooves are provided on the end surfaces of the lower tube and the upper tube close to each other, the two sealing sleeves are respectively pressed against the sealing gaskets on the walls of the two sealing grooves, the inner wall of the sealing sleeve close to the spring is pressed against the sealing gasket on the convex edge of the end of the connecting pipe, and a grip plate is connected to the sealing sleeve near the switching plate.

[0012] In a second aspect, the present application provides a method for dust removal of flue gas for low-rank coal calcination, which adopts the following technical solution: A method for removing dust from flue gas during low-rank coal calcination comprises the following steps: Step 1: Pass the flue gas to be dedusted into the dust removal cylinder from the air inlet pipe, and add water into the dust removal cylinder through the water adding pipe. Step 2: Start the driving structure to drive the dust removal structure to rotate, and through the rotation of the filter cotton net on the dust removal structure, the dust floating inside the dust removal cylinder is brought into the water for dust removal; Step 3: The smoke after dust removal is discharged from the exhaust pipe; Step 4: When a group of dust removal structures in the dust removal cylinder needs to be flushed, the dust removal structure is closed by driving the structure and closing the structure, the cylinder is started, and a group of dust removal structures in the dust removal cylinder is moved to one of the flushing cylinders, and another group of dust removal structures is moved to the dust removal cylinder to continue the dust removal work, and the dust removal structure is unfolded again; Step 5: Flushing the dust removal structure in the corresponding flushing cylinder through the flushing structure to improve the quality of dust removal work.

[0013] In summary, the present invention includes the following beneficial technical effects: The present invention has flushing cylinders installed at both ends of the dust collecting cylinder, and the two flushing cylinders are provided with flushing structures, and the two groups of dust collecting structures are respectively arranged in the dust collecting cylinder and one of the flushing cylinders. When the filter cotton net in the dust collecting cylinder needs to be flushed after long-term use, the dust collecting structure in the dust collecting cylinder can be automatically moved to one of the flushing cylinders, and the dust collecting structure in the other flushing cylinder is moved to the dust collecting cylinder. When the dust collecting structure is dusted, not only can the normal dust collecting work be ensured and the work efficiency be improved, but also the sewage generated after flushing is accumulated in the flushing cylinder and will not enter the dust collecting cylinder, thereby improving the flushing work quality; The present invention is provided with a closing structure and a driving structure, and when the dust removal structure is moved, the dust removal structure can be automatically closed, so that in the process of transferring the dust removal structure, the dust in the dust removal cylinder is prevented from entering the adjacent flushing cylinder, which causes the problem of incomplete dust removal. The present invention is provided with a sewage discharge structure, a switching structure and two groups of spliced ​​filtering structures. The sewage generated in the dust removal cylinder and the flushing cylinder can be discharged through the sewage discharge structure, and the impurities in the sewage can be filtered in conjunction with the spliced ​​filtering structure, so that the filtered water can be reused, thereby reducing the waste of water resources. When the filter screen on one group of the spliced ​​filtering structures needs to be cleaned, the other group of the spliced ​​filtering structures can be switched to the sewage discharge structure through the switching structure. While cleaning the filter screen, the sewage treatment work can continue, thereby improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 Schematic diagram of the internal structure of the dust removal cylinder and the flushing cylinder in the embodiment of the present invention; Figure 3In the embodiment of the present invention Figure 1 A magnified view of the structure at A; Figure 4 It is a structural schematic diagram of a switching structure and a splicing filtering structure in an embodiment of the present invention; Figure 5 In the embodiment of the present invention Figure 4 A magnified view of the structure at B; Figure 6 is a schematic structural diagram of a dust removal structure in an embodiment of the present invention; Figure 7 In the embodiment of the present invention Figure 6 A magnified view of the structure at C; Figure 8 is a schematic diagram of the structure of the first inner groove and the second inner groove in an embodiment of the present invention; Fig. 9 In the embodiment of the present invention Figure 8 Enlarged view of the structure at D.

[0015] Description of the reference numerals: 1, bottom plate; 2, mounting plate; 3, dust removal cylinder; 4, flushing cylinder; 5, cylinder; 6, air inlet pipe; 7, through-hole; 8, sealing plate; 9, filter cotton net; 10, arc plate; 11, fixing plate; 12, annular groove; 13, groove; 14, folding plate; 15, curved plate; 16, first inner groove; 17, second inner groove; 18, first motor; 19, bidirectional screw; 20, moving sleeve; 21, driving strip; 22, gear; 23, second motor; 24 , turntable; 25, telescopic rod; 26, water tank; 27, water pump; 28, water supply pipe; 29, flushing pipe; 30, flushing head; 31, first sewage pipe; 32, second sewage pipe; 33, connecting box; 34, upper pipe; 35, connecting plate; 36, lower pipe; 37, switching column; 38, switching plate; 39, middle sleeve; 40, connecting pipe; 41, sealing sleeve; 42, sealing groove; 43, spring; 44, grip plate; 45, filter cartridge; 46, filter screen; 47, rotating rod. DETAILED DESCRIPTION

[0016] The following is combined with Figure 1-Figure 9 The present invention is described in further detail.

[0017] The embodiment of the present invention discloses a flue gas dust removal device for calcining low-rank coal.

[0018] A flue gas dust removal device for low-rank coal calcination, comprising a bottom plate 1 and a dust removal barrel 3, mounting plates 2 are fastened with bolts on the left and right sides of the bottom plate 1, dust removal barrels 3 are fixedly passed through the two mounting plates 2, a fixing plate 11 is installed above the inner wall of the dust removal barrel 3, the lower side of the fixing plate 11 is a concave arc surface, flushing barrels 4 are installed at both ends of the dust removal barrel 3, flushing structures are arranged on the flushing barrel 4, two groups of dust removal structures are arranged in the dust removal barrel 3 and the flushing barrel 4 on the right, the middle of the side of the dust removal barrel 3 is connected with an air intake pipe 6, the middle of the side of the dust removal barrel 3 away from the air intake pipe 6 is connected with an exhaust pipe, the position of the dust removal barrel 3 near the air intake pipe 6 is connected with a water supply pipe, the dust removal barrel 3 and the flushing barrel 4 are both provided with a sewage discharge structure, and the flushing barrel 4 on the left is provided with a driving structure; The two groups of dust removal structures include two rotating rods 47 in the dust removal cylinder 3 and one of the flushing cylinders 4, three sealing discs 8 are arranged on the two rotating rods 47, one of which is connected to the end of the two rotating rods 47 close to each other, and the other two sealing discs 8 are installed at the ends of the two rotating rods 47 away from each other. A through hole 7 is opened in the middle of the left and right sides of the dust removal cylinder 3, and the two sealing discs 8 are tightly inserted in the two through holes 7. The outer diameter of the sealing disc 8 is the same as the inner diameter of the through hole 7. Annular grooves 12 are opened on the edges of the left and right sides of the sealing disc 8 in the middle, and annular grooves 12 are opened on the edges of the two sealing discs 8 at both ends close to each other. A plurality of filter cotton nets 9 are arranged on the side of each rotating rod 47 through a closing structure, and the filter cotton nets 9 are away from the end of the rotating rod 47. It is connected to the middle of the inner wall of the arc plate 10, and the thickness of the arc plate 10 is the same as the depth of the annular groove 12. Multiple arc plates 10 can be closed to form a complete cylinder. A cylinder 5 is installed in the middle of the flushing cylinder 4 on the right side away from the side of the dust collecting cylinder 3. One end of the output shaft of the cylinder 5 is rotatably connected to the corresponding sealing disk 8. When the filter cotton mesh 9 in the dust collecting cylinder 3 is used for a long time and needs to be flushed, the cylinder 5 is started to move the filter cotton mesh 9 in the dust collecting cylinder 3 to one of the flushing cylinders 4 for flushing, and the filter cotton mesh 9 in the other flushing cylinder 4 is moved into the dust collecting cylinder 3. In the process of flushing the filter cotton mesh 9, the dust removal work in the dust collecting cylinder 3 is continued, the work efficiency is improved, and the sewage generated in the process of flushing the filter cotton mesh 9 will accumulate in the flushing cylinder 4, thereby improving the flushing quality.

[0019] See also Figure 1 , Figure 2 , Figure 6 , Figure 7 , Figure 8 and Fig. 9The closing structure includes a plurality of grooves 13 provided on the groove wall of each annular groove 12, and the plurality of grooves 13 are distributed at equal angles on the circumference of the sealing disk 8. A rotating shaft is rotatably connected between the groove walls on both sides of each groove 13, and a folding plate 14 is fixedly sleeved at one end of each rotating shaft. A curved plate 15 is rotatably connected to the end of the folding plate 14 away from the rotating shaft, and one end of the curved plate 15 is rotatably connected to the inner wall of the arc plate 10. The side surface of the filter cotton net 9 is connected to the curved plate 15 and the folding plate 14, and a driving structure is provided in the rotating rod 47 and the sealing disk 8; The driving structure includes a first inner groove 16 provided in each rotating rod 47, a second inner groove 17 provided in the two sealing disks 8 at both ends, a through groove provided on the sealing disk 8 in the middle, the through groove connecting the two first inner grooves 16, a first motor 18 installed in one of the second inner grooves 17, a bidirectional screw 19 provided in each of the two rotating rods 47, the two bidirectional screws 19 are connected to each other, one end of the output shaft of the first motor 18 is connected to one end of the corresponding bidirectional screw 19, the left and right sections of the thread on each bidirectional screw 19 are in opposite directions, a movable sleeve 20 is sleeved near both ends of each bidirectional screw 19, a thread for the bidirectional screw 19 to pass through is provided on the inner wall of the movable sleeve 20, a driving strip 21 is fixedly embedded at the position corresponding to each rotating shaft on the side of each movable sleeve 20, a gear 22 is fixedly sleeved in the middle of each rotating shaft, and the driving strip 21 is provided with teeth meshing with the gear 22 , the limiting rods are movable through the through holes on the multiple movable sleeves 20, and the two ends of the limiting rods are fixedly connected to the inner walls of the sealing disks 8 at both ends. In the process of moving the filter cotton net 9, the first motor 18 in the second inner groove 17 can be started to drive the bidirectional screw 19 to rotate, and the two movable sleeves 20 are synchronously moved in the direction away from each other on the rotating bidirectional screw 19, driving the driving bar 21 to move, and the folding plate 14 and the curved plate 15 are driven to fold through the gear 22, and the filter cotton net 9 is closed on the rotating rod 47, and the arc plate 10 is driven to move and spliced ​​into the annular groove 12 of the sealing disk 8. In this way, in the process of moving the filter cotton net 9, the sealing disk 8 and the spliced ​​arc plate 10 move close to the inner wall of the through-hole 7, so that the dust in the dust removal cylinder 3 can be prevented from entering the flushing cylinder 4, resulting in the problem of incomplete dust removal, and in the flushing process, the sewage generated during the flushing process can be prevented from entering the dust removal cylinder 3, thereby improving the flushing quality.

[0020] See also Figure 1-Figure 5The driving structure includes a second motor 23 installed in the middle of the left side of the left flushing cylinder 4. A turntable 24 is rotatably installed in the middle of the left inner wall of the left flushing cylinder 4. One end of the output shaft of the second motor 23 is fixedly connected to the turntable 24. A plurality of telescopic rods 25 are connected to the edge of one side of the turntable 24. One end of the telescopic rod 25 is connected to the corresponding sealing disk 8. When removing dust, the second motor 23 is started to drive the rotating rod 47 and the filter cotton net 9 to rotate, so that the plurality of filter cotton nets 9 of each group can be fully utilized. At the same time, the telescopic rod 25 is used to extend and retract without hindering the normal movement of the dust removal structure. The flushing structure includes a water supply pipe 28 which is respectively fixedly inserted into the middle upper part of the two flushing cylinders 4, and one end of the water supply pipe 28 inserted into the flushing cylinder 4 is connected with a flushing pipe 29, and the flushing pipe 29 is fixedly installed at the upper part of the flushing cylinder 4, and a plurality of flushing heads 30 are installed below the flushing pipe 29. A water storage tank 26 is fixedly installed on the two mounting plates 2, and a water pump 27 is installed on both the left and right sides of the water storage tank 26. The water pump 27 is connected with the other end of the water supply pipe 28. When the water pump 27 is started, the water in the water storage tank 26 can be sent to the flushing pipe 29, and the flushing head 30 sprays water on the filter cotton net 9 for flushing; The sewage discharge structure includes a first sewage discharge pipe 31 connected to the lower middle part of the two flushing cylinders 4, a second sewage discharge pipe 32 is connected to the lower middle part of the dust removal cylinder 3, one end of the first sewage discharge pipe 31 and the second sewage discharge pipe 32 are both connected to the connecting box 33, an upper pipe 34 is connected to the middle part of the lower part of the connecting box 33, a lower pipe 36 is arranged just below the upper pipe 34, the bottom end of the lower pipe 36 is connected to the top of the water storage tank 26, the upper pipe 34 and the lower pipe 36 are connected by a connecting plate 35, a switching space is left between the upper pipe 34 and the lower pipe 36, and a switching structure is arranged at a position near the lower pipe 36 on the water storage tank 26; The switching structure includes a switching column 37 rotatably mounted on the water storage tank 26 near the lower tube 36, a switching plate 38 is mounted on the top of the switching column 37, and splicing filtering structures are arranged at both ends of the switching plate 38; The spliced ​​filtering structure includes an intermediate sleeve 39 fixedly connected to both ends of the switching plate 38, a connecting pipe 40 is fixedly passed through the intermediate sleeve 39, and the connecting pipe 40 is in an "H" shape. A filter cartridge 45 is placed on the support ring near the bottom of the inner wall of the connecting pipe 40, and a filter screen 46 is installed below the filter cartridge 45. The upper and lower ends of the connecting pipe 40 are both movably sleeved with sealing sleeves 41, and a plurality of springs 43 are connected between the sealing sleeve 41 and the intermediate sleeve 39. A sealing groove 42 is provided on the end surface of the lower tube 36 and the upper tube 34 close to each other, and the two sealing sleeves 41 are respectively pressed against the sealing gaskets on the groove walls of the two sealing grooves 42, and the sealing sleeves 41 are close to the springs. The inner wall of one side of 43 is pressed against the sealing gasket of the convex edge of the end of the connecting pipe 40, and a grip plate 44 is connected to the sealing sleeve 41 at a position close to the switching plate 38. When the sewage in the flushing cylinder 4 and the dust removal cylinder 3 is discharged, the sewage is concentrated into the connecting box 33, and is passed into the water storage tank 26 through the upper tube 34 and the lower tube 36, and the impurities in the sewage are filtered by the filter screen 46, so that the water recycling function can be realized and the waste of water resources can be reduced. When one of the filter screens 46 needs to be cleaned, the other filter screen 46 can be switched between the upper tube 34 and the lower tube 36. While cleaning the filter screen 46, the filtering work can be ensured to proceed smoothly.

[0021] The embodiment of the present invention also discloses a method for dust removal of flue gas for calcining low-rank coal, comprising the following steps: Step 1: Pass the smoke to be dedusted into the dust removal tube 3 from the air inlet pipe 6, and add water into the dust removal tube 3 through the water adding pipe. Step 2: Start the driving structure to drive the dust removal structure to rotate, and through the rotation of the filter cotton net 9 on the dust removal structure, the dust floating inside the dust removal cylinder 3 is brought into the water to remove the dust; Step 3: The smoke after dust removal is discharged from the exhaust pipe; Step 4: When a group of dust removal structures in the dust removal cylinder 3 needs to be flushed, the dust removal structures are closed by the driving structure and the closing structure, and the cylinder 5 is started to move a group of dust removal structures in the dust removal cylinder 3 to one of the flushing cylinders 4, and the other group of dust removal structures is moved to the dust removal cylinder 3 to continue the dust removal work, and the dust removal structure is unfolded again; Step 5: flush the dust removal structure in the corresponding flushing cylinder 4 through the flushing structure to improve the quality of dust removal work.

[0022] The implementation principle of the flue gas dust removal device and method for low-rank coal calcination in the embodiment of the present invention is as follows: first, the flue gas to be dusted is passed from the air inlet pipe 6 into the dust removal barrel 3, and the second motor 23 is started to drive the rotating rod 47 and the filter cotton mesh 9 to rotate as a whole. In the dust removal barrel 3, the filter cotton mesh 9 brings the dust in the dust removal barrel 3 into the water inside the dust removal barrel 3 to perform dust removal work, and the dust-removed flue gas is discharged from the exhaust pipe. When the filter cotton mesh 9 in the dust removal barrel 3 is used for a long time and needs to be cleaned, the first motor 18 in the second inner groove 17 is started to drive the bidirectional screw 19 to rotate, and the two movable sleeves 20 are synchronously moved away from each other on the rotating bidirectional screw 19, driving the driving bar 21 to move, and the folding plate 14 and the curved plate 15 are driven to fold through the gear 22, and the filter cotton mesh 9 is closed on the rotating rod 47, and the arc plate 10 is driven to move. It is dynamically spliced ​​into the annular groove 12 of the sealing disk 8, thereby closing the dust removal structure. Next, the cylinder 5 is started to move the filter cotton mesh 9 in the dust removal cylinder 3 to one of the flushing cylinders 4 for flushing, and the filter cotton mesh 9 in the other flushing cylinder 4 is moved to the dust removal cylinder 3, and the filter cotton mesh 9 is unfolded again, and the second motor 23 is started to continue to drive the filter cotton mesh 9 to rotate, so as to ensure that the dust removal work in the dust removal cylinder 3 continues. During flushing, the water pump 27 is started to send the water in the water storage tank 26 to the flushing pipe 29, and the flushing head 30 sprays water on the rotating filter cotton mesh 9 for flushing. The sewage generated after flushing is discharged from the first sewage pipe 31 into the connecting box 33, and then passed into the upper pipe 34 and the lower pipe 36. After being filtered by the filter mesh 46, the flushing water can be recovered to the water storage tank 26 for reuse, so that the dust removal and flushing work can be completed.

[0023] The above are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A flue gas dust removal device for low-rank coal calcination, comprising a bottom plate (1) and a dust removal cylinder (3), characterized in that: Mounting plates (2) are fastened with bolts on both left and right sides of the bottom plate (1); a dust collecting cylinder (3) is fixedly passed through the two mounting plates (2); a fixing plate (11) is installed above the inner wall of the dust collecting cylinder (3); the lower side of the fixing plate (11) is in a concave arc shape; flushing cylinders (4) are installed at both ends of the dust collecting cylinder (3); a flushing structure is provided on the flushing cylinder (4); two groups of dust collecting structures are provided in the dust collecting cylinder (3) and the flushing cylinder (4) on the right; an air inlet pipe (6) is connected to the middle of the side of the dust collecting cylinder (3); an exhaust pipe is connected to the middle of the side of the dust collecting cylinder (3) away from the air inlet pipe (6); a water supply pipe is connected to the position of the dust collecting cylinder (3) near the air inlet pipe (6); a sewage discharge structure is provided on both the dust collecting cylinder (3) and the flushing cylinder (4); a driving structure is provided on the flushing cylinder (4) on the left; The two groups of dust removal structures comprise two rotating rods (47) in the dust removal cylinder (3) and one of the flushing cylinders (4), respectively; three sealing discs (8) are arranged on the two rotating rods (47); one of the sealing discs (8) is connected to the ends of the two rotating rods (47) that are close to each other; the other two sealing discs (8) are installed at the ends of the two rotating rods (47) that are far away from each other; a through opening (7) is provided in the middle of the left and right sides of the dust removal cylinder (3); the two sealing discs (8) are tightly inserted into the two through openings (7); the outer diameter of the sealing disc (8) is the same as the inner diameter of the through opening (7); and the edges of the left and right sides of the sealing disc (8) in the middle are both provided with An annular groove (12), an annular groove (12) is provided at the edges of the two sealing disks (8) at the two ends close to one side thereof, a plurality of filter cotton nets (9) are provided on the side of each rotating rod (47) through a closing structure, the end of the filter cotton nets (9) away from the rotating rod (47) is connected to the middle of the inner wall of the arc plate (10), the thickness of the arc plate (10) is the same as the depth of the annular groove (12), and a plurality of the arc plates (10) can be closed to form a complete cylinder, a cylinder (5) is installed at the middle of the side of the flushing cylinder (4) away from the dust removal cylinder (3) on the right side, and one end of the output shaft of the cylinder (5) is rotatably connected to the corresponding sealing disk (8).

2. The flue gas dust removal equipment for low-rank coal calcination according to claim 1, characterized in that: The closing structure comprises a plurality of grooves (13) formed on the groove wall of each annular groove (12), the plurality of grooves (13) being distributed at equal angles on the circumference of the sealing disk (8), a rotating shaft being rotatably connected between the groove walls on both sides of each groove (13), a folding plate (14) being fixedly sleeved at one end of each rotating shaft, a curved plate (15) being rotatably connected to the end of the folding plate (14) away from the rotating shaft, one end of the curved plate (15) being rotatably connected to the inner wall of the arc-shaped plate (10), the side surface of the filter cotton net (9) being connected to the curved plate (15) and the folding plate (14), and a driving structure being provided in the rotating rod (47) and the sealing disk (8).

3. The flue gas dust removal equipment for low-rank coal calcination according to claim 2, characterized in that: The driving structure comprises a first inner groove (16) provided in each rotating rod (47), a second inner groove (17) provided in the two sealing disks (8) at the two ends, a through groove provided on the sealing disk (8) in the middle, the through groove communicating with the two first inner grooves (16), a first motor (18) being installed in one of the second inner grooves (17), a bidirectional screw rod (19) being provided in each of the two rotating rods (47), the two bidirectional screw rods (19) being connected to each other, one end of the output shaft of the first motor (18) being connected to one end of the corresponding bidirectional screw rod (19), and each bidirectional screw rod (19) having a left and right end. The two sections of the thread have opposite directions. A movable sleeve (20) is sleeved near both ends of each bidirectional screw (19). A thread for the bidirectional screw (19) to pass through is arranged on the inner wall of the movable sleeve (20). A driving strip (21) is fixedly embedded at a position corresponding to each rotating shaft on the side surface of each movable sleeve (20). A gear (22) is fixedly sleeved at the middle of each rotating shaft. The driving strip (21) is provided with teeth meshing with the gear (22). Limiting rods are movably passed through the through holes on the plurality of movable sleeves (20). The two ends of the limiting rods are fixedly connected to the inner walls of the sealing disks (8) at the two ends.

4. The flue gas dust removal equipment for low-rank coal calcination according to claim 1, characterized in that: The driving structure comprises a second motor (23) mounted in the middle of the left side surface of the left flushing cylinder (4); a turntable (24) is rotatably mounted in the middle of the left inner wall of the left flushing cylinder (4); one end of the output shaft of the second motor (23) is fixedly connected to the turntable (24); a plurality of telescopic rods (25) are connected to the edge of one side of the turntable (24); one end of the telescopic rods (25) is connected to the corresponding sealing disk (8).

5. The flue gas dust removal equipment for low-rank coal calcination according to claim 1, characterized in that: The flushing structure comprises a water supply pipe (28) which is fixedly inserted into the middle upper part of the two flushing cylinders (4), one end of the water supply pipe (28) inserted into the flushing cylinder (4) is connected to a flushing pipe (29), the flushing pipe (29) is fixedly installed at the upper part of the flushing cylinder (4), and a plurality of flushing heads (30) are installed below the flushing pipe (29). A water storage tank (26) is fixedly installed on the two mounting plates (2), and a water pump (27) is installed on both left and right side surfaces of the water storage tank (26), and the water pump (27) is connected to the other end of the water supply pipe (28).

6. The flue gas dust removal equipment for low-rank coal calcination according to claim 1, characterized in that: The sewage discharge structure comprises a first sewage discharge pipe (31) connected to the lower middle part of the two flushing cylinders (4), a second sewage discharge pipe (32) connected to the lower middle part of the dust removal cylinder (3), one end of each of the first sewage discharge pipe (31) and the second sewage discharge pipe (32) connected to a connecting box (33), an upper pipe (34) connected to the middle part of the lower part of the connecting box (33), a lower pipe (36) arranged directly below the upper pipe (34), the bottom end of the lower pipe (36) connected to the top end of the water storage tank (26), the upper pipe (34) and the lower pipe (36) connected via a connecting plate (35), a switching space is reserved between the upper pipe (34) and the lower pipe (36), and a switching structure is arranged at a position above the water storage tank (26) near the lower pipe (36).

7. The flue gas dust removal equipment for low-rank coal calcination according to claim 6, characterized in that: The switching structure comprises a switching column (37) rotatably mounted on the water storage tank (26) near the lower tube (36), a switching plate (38) being mounted on the top of the switching column (37), and spliced ​​filtering structures being arranged at both ends of the switching plate (38).

8. The flue gas dust removal equipment for low-rank coal calcination according to claim 7, characterized in that: The spliced ​​filtering structure comprises an intermediate sleeve (39) fixedly connected to both ends of the switching plate (38), a connecting pipe (40) fixedly passing through the intermediate sleeve (39), the connecting pipe (40) being in an "H" shape, a filter cartridge (45) being placed on a support ring near the bottom end of the inner wall of the connecting pipe (40), a filter screen (46) being installed below the filter cartridge (45), and sealing sleeves (41) being movable sleeves at both upper and lower ends of the connecting pipe (40), the sealing sleeves (41) being provided with a plurality of sealing sleeves (42). 1) and a middle sleeve (39), a plurality of springs (43) are connected between the lower tube (36) and the upper tube (34), a sealing groove (42) is provided on the end surfaces close to one end of each other, the two sealing sleeves (41) are respectively pressed against the sealing gaskets on the groove walls of the two sealing grooves (42), the inner wall of the sealing sleeve (41) close to the spring (43) is pressed against the sealing gasket on the convex edge of the end of the connecting pipe (40), and a grip plate (44) is connected to the sealing sleeve (41) at a position close to the switching plate (38).

9. A method for removing dust from flue gas during calcination of low-rank coal, characterized in that: The flue gas dust removal method uses a flue gas dust removal device for low-rank coal calcination as described in any one of claims 1 to 8, comprising the following steps: Step 1: The flue gas to be dedusted is passed from the air inlet pipe (6) into the dust removal cylinder (3), and water is added into the dust removal cylinder (3) through the water adding pipe. Step 2: starting the driving structure to drive the dust removal structure to rotate, and through the rotation of the filter cotton net (9) on the dust removal structure, the dust floating inside the dust removal cylinder (3) is brought into the water to remove the dust; Step 3: The smoke after dust removal is discharged from the exhaust pipe; Step 4: When a group of dust removal structures in the dust removal cylinder (3) needs to be flushed, the dust removal structures are closed by driving the structure and closing the structure, and the cylinder (5) is started to move a group of dust removal structures in the dust removal cylinder (3) to one of the flushing cylinders (4), and another group of dust removal structures is moved to the dust removal cylinder (3) to continue the dust removal work, and the dust removal structures are unfolded again; Step 5: flushing the dust removal structure in the corresponding flushing cylinder (4) through the flushing structure to improve the quality of dust removal work.

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