Small composite pre-dedusting device

Abstract

The utility model discloses a small-sized composite pre-dedusting device, which belongs to the technical field of dedusting and comprises an outer cylinder, a plurality of inner cylinders and a plurality of outer cylinders, the inner cylinder is arranged in the outer cylinder, one end of the inner cylinder is connected with the partition plate, and at least one first hole is formed in the side wall of the inner cylinder; the bottom plate is arranged at the other end of the inner cylinder, and a second hole is formed in the bottom plate in a penetrating manner; through the arrangement mode, during use, airflow with tiny dust impurities flows into the outer barrel, then the airflow passes through the first hole and the second hole in the second flowing direction, flows through the inner barrel and then flows into the first pipe, part of tiny dust is stopped after impacting the side walls of the inner barrel and the bottom plate, and the part of the tiny dust is separated from the inner barrel and the bottom plate. Part of tiny dust is separated from air flow under the action of centrifugal force, the tiny dust can be pre-filtered from the source of the dust remover, and a better dust removal effect is achieved by being used in combination with the dust remover.

Description

Technical Field

[0001] This utility model relates to the field of dust removal system technology, and in particular to a small composite pre-dust removal device. Background Technology

[0002] The new thermal power system boiler heats feedwater to produce steam through coal combustion. The bottom ash from the coal combustion is cooled by a ash cooler and then transported to the ash silo via a two-stage scraper conveyor and a three-stage bucket elevator. During ash transport, the drop in elevation during transfer creates dust pollution in the working environment and the atmosphere. Currently, two new baghouse dust collectors have been added to the ash conveying systems of the two boilers to collect dust and improve air quality. However, the original dust collectors in the ash conveying system have poor dust collection efficiency and cannot operate normally, resulting in severe dust pollution on site and multiple system shutdowns, seriously affecting the safe and stable operation of the boilers.

[0003] The investigation revealed that the scraper conveyor in the secondary scraper silo scrapes the material out of the silo and it falls into the tertiary bucket elevator below. A large amount of ash and slag is stirred up during this process. Therefore, a dust collection hood is installed at the connection between the secondary scraper silo and the tertiary bucket elevator. This hood is connected to the dust collector. When ash and slag fall from the secondary scraper silo into the tertiary bucket elevator, the amount of dust entering the dust collector increases sharply, leading to a decrease in the dust collection efficiency. This is the main reason for the poor dust collection efficiency of the dust collector. Furthermore, due to limited installation space, it is not feasible to add another dust collection system. Utility Model Content

[0004] The purpose of this invention is to solve the above-mentioned problems by providing a small composite pre-dust removal device.

[0005] To achieve the above objectives, the technical solution of this utility model is: a small-scale composite pre-dust removal device, comprising:

[0006] The outer cylinder is rigidly designed, and internal partitions are installed.

[0007] An inner cylinder is disposed inside the outer cylinder, one end of which is connected to the partition plate, and at least one first hole is provided on its side wall;

[0008] The bottom plate is located at the other end of the inner cylinder and has a second hole through it;

[0009] The partition plate is also provided with a ventilation hole that communicates with the inside of the inner cylinder.

[0010] Furthermore, both ends of the outer cylinder are provided with enlarged diameter sections.

[0011] Furthermore, a reduced diameter section is provided on the side wall of the outer cylinder. The reduced diameter section is located near the first end of the outer cylinder, and the distance between the end of the reduced diameter section near the first end and the first end is not greater than the thickness of the partition plate. The partition plate is inserted into the outer cylinder.

[0012] Furthermore, an annular gasket is inserted into the expanded diameter portion at the first end, the annular gasket having a rigid body and a flexible sealing gasket, the flexible sealing gasket being disposed on the side of the rigid body away from the reduced diameter portion.

[0013] Furthermore, a plurality of hooks are provided on the outer circumferential surface of the expanded diameter portion at the first end, and the plurality of hooks are evenly spaced around the axis of the outer cylinder.

[0014] Furthermore, the inner cylinder and the outer cylinder are coaxially arranged, and the inner cylinder is fixedly connected to the bottom plate and the partition plate.

[0015] Furthermore, the expanded diameter portion at the first end is fitted with a first tube, and the first tube is provided with a movable buckle that engages with the plurality of the hanging parts.

[0016] Compared with the prior art, the small composite pre-dust removal device disclosed in this utility model has the following advantages: In use, the airflow carrying micro-dust impurities flows into the outer cylinder, and then the airflow flows through the first and second holes in the second flow direction, passes through the inner cylinder, and then flows into the first pipe. When the airflow flows in the second flow direction, the impurities and micro-dust carried by the airflow will change their movement direction after impacting the side walls of the inner cylinder and the bottom plate, thereby blocking some micro-dust and impurities. Another part of the airflow that passes through the bottom plate and flows into the first hole will change its airflow direction. Some dust will continue to move upward under the action of centrifugal force and impact the baffle. Under the action of centrifugal force, it will be separated from the airflow, which can pre-filter some dust and achieve the effect of pre-filtration and dust removal. Thus, it can pre-filter the amount of micro-dust from the source of the dust collector. When used in combination with the dust collector, it can achieve a better dust removal effect. Moreover, the small composite pre-dust removal device provided in this application is small in size and can be used in the small space where the gas collection hood and the first pipe meet. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a small composite pre-dust removal device connected with a dust collector and a gas collection hood according to the present invention.

[0018] Figure 2 This is a schematic diagram of the overall structure of the first embodiment of the small composite pre-dust removal device of this utility model. Figure 1 .

[0019] Figure 3 This is a cross-sectional structural schematic diagram of the first embodiment of the small composite pre-dust removal device of this utility model.

[0020] Figure 4 This is a schematic diagram of the connection between the inner cylinder and the partition in the small composite pre-dust removal device of this utility model.

[0021] Figure 5 for Figure 3The diagram shown is a partially enlarged structural schematic of point A in the small composite pre-dust removal device of this utility model.

[0022] Figure 6 This is a schematic diagram of the overall structure of the second embodiment of the small composite pre-dust removal device of this utility model.

[0023] Figure 7 This is a cross-sectional view of the second embodiment of the small composite pre-dust removal device of this utility model when connected to the first pipe.

[0024] In the diagram: 1. First pipe; 10. Movable buckle; 2. Pre-dust removal device; 20. Outer cylinder; 201. Expanding section; 202. Reducing section; 210. Partition; 2101. Vent hole; 211. Inner cylinder; 212. Bottom plate; 213. First hole; 2120. Second hole; 22. Hanging piece; 23. Annular gasket; 230. Flexible sealing gasket; 231. Rigid body; 3. Dust collector; 4. Secondary scraper bin; 5. Gas collection hood; 6. Tertiary bucket elevator bin; 8. Second flow direction; 9. First flow direction. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0026] Example 1

[0027] As one specific implementation method, please refer to Figure 1-4 This application provides a small composite pre-dust removal device 2, comprising: an outer cylinder 20, which is rigidly configured and has a partition 210 disposed inside; an inner cylinder 211, disposed inside the outer cylinder 20, with one end connected to the partition 210, and at least one first hole 213 disposed on its side wall; a bottom plate 212, disposed at the other end of the inner cylinder 211, and having a second hole 2120 through it; the partition 210 also has a vent hole 2101 through it, communicating with the interior of the inner cylinder 211. Specifically, refer to... Figure 1 The small pre-dust removal device 2 provided in this application is installed between the first pipe 1 and the gas collection hood 5 during use. The first pipe 1 also has a pipe connected to the dust collector 3 on its side wall. The lower end of the first pipe 1 is connected to the outer cylinder 20. The gas collection hood 5 is connected between the secondary scraper bin 4 and the tertiary bucket elevator bin 6. A gas collection pipe is installed on the top of the gas collection hood 5, and the gas collection pipe is connected to the lower end of the outer cylinder 20. The secondary scraper bin 4 and the tertiary bucket elevator bin 6 are existing equipment in the factory. The dust collector 3 is a bag filter 3, which uses a structure with the air pump located at the rear. During operation, the air pump provides negative pressure inside the dust collector 3, thereby generating suction force in the first pipe 1 and the gas collection hood 5. At this time, the airflow direction inside the pipe is... Figure 1 The first flow direction 9 shown in the figure enables the dust in the slag removal system to be sucked and filtered. In actual use, the end plate and inner cylinder 211 are positioned in the state of the outer cylinder 20 as follows: Figure 3 As shown, the first end of the outer cylinder 20 near the end plate is connected to the first pipe 1, and the other end of the outer cylinder 20 is connected to the gas collecting pipe of the gas collecting hood 5. At this time, the inner cylinder 211 is located on the side of the end plate near the gas collecting hood 5. When the dust collector 3 is working, the dust in the gas collecting hood 5 flows into the outer cylinder 20 with the airflow through the gas collecting pipe. (Reference) Figure 7 Then, the airflow follows the second flow direction 8, passes through the first hole 213 and the second hole 2120, flows through the inner cylinder 211, and then flows into the first pipe 1. When the airflow follows the second flow direction 8, the impurities and dust carried by the airflow will impact the side walls of the inner cylinder 211 and the bottom plate 212 and change their direction of movement. Some dust will be separated from the airflow and fall into the three-stage bucket elevator 6 below. Another part of the airflow that passes through the bottom plate 212 and flows into the first hole 213 will change its direction of airflow. Some dust will continue to move upward under the action of centrifugal force and impact the baffle 210. Under the action of centrifugal force, it will be separated from the airflow, thereby pre-filtering some dust and achieving the effect of pre-filtering dust removal. Thus, it can pre-filter the amount of fine dust from the source of the dust collector 3 and achieve a better dust removal effect. Moreover, the small composite pre-dust removal device 2 provided by this application is small in size and can be used in the small space where the gas collection hood 5 and the first pipe 1 meet.

[0028] Specifically, during use, the partition plate 210 of the pre-dust removal device 2 is positioned above the base plate 212.

[0029] In a specific implementation, during use, the two ends of the outer cylinder 20 can be connected to the gas collection pipe on the first pipe 1 and the gas collection hood 5 by welding.

[0030] Referring to the table below, the test data of the dust removal system before and after the installation of the small composite pre-dust removal device 2 provided in this application are as follows: the inlet concentration refers to the concentration of fine dust in the airflow at the inlet of the dust collector 3 connected to the first pipe 1, the outlet concentration refers to the concentration of fine dust in the gas discharged from the outlet after filtration by the dust collector 3, and the flue gas volume refers to the flow rate of the gas carrying fine dust that passes through the dust collector 3.

[0031]

[0032] Example 2

[0033] It is understandable that when installing the small composite pre-dust removal device 2 provided in this application between the first pipe 1 and the gas collecting pipe by welding, a portion of the original pipeline needs to be cut off and then welded. During the pre-dust removal process, dust adheres to the outer circumferential surfaces of the inner cylinder 211 and the outer cylinder 20 as the airflow passes between them. Over time, this dust accumulation affects the pre-dust removal effect of the small composite pre-dust removal device 2 and also affects the gas flow rate. Welding is not conducive to disassembly. Currently, the common method is to tap the outer cylinder 20 to shake off some of the dust, which is not convenient for cleaning the internal dust and is not thorough. To facilitate the cleaning of internal dust, refer to... Figure 6 Both ends of the outer cylinder 20 are provided with enlarged diameter portions 201. Specifically, by providing enlarged diameter portions 201, it is convenient to insert the first pipe 1 and the gas collecting pipe. After insertion, a snap-fit ​​structure can be provided between the outer cylinder 20 and the first pipe 1, and between the outer cylinder 20 and the gas collecting pipe, to snap-fit ​​the outer cylinder 20, the first pipe 1, and the gas collecting pipe. The snap-fit ​​connection can form a detachable installation structure, which is convenient for disassembling and cleaning the small composite pre-dust removal device 2.

[0034] Specifically, when fixing the outer cylinder 20 body by welding, the expansion section 201 is provided to facilitate the insertion of the outer cylinder 20 body with the first pipe 1 and the gas collecting pipe, and welding is also facilitated after insertion.

[0035] Furthermore, as one embodiment, the outer cylinder 20, inner cylinder 211, partition plate 210 and bottom plate 212 are all fixedly connected by welding. In this case, the outer cylinder 20 is detachably connected to the first pipe 1 and the gas collecting pipe.

[0036] In another embodiment, the outer cylinder 20 and the partition plate 210 are detachably connected, while the inner cylinder 211, partition plate 210, and bottom plate 212 are connected by welding. The outer cylinder 20 is welded to the lower gas collecting pipe and inserted into the first pipe 1. A snap-fit ​​structure is then used to form a detachable connection. When cleaning the pre-dust removal device 2, the outer cylinder 20 and the first pipe 1 are disassembled, and the internal partition plate 210 and inner cylinder 211 are removed for cleaning, and then reinstalled. Further, as a specific embodiment, a detachable connection between the partition plate 210 and the outer cylinder 20 is as follows: (Refer to...) Figure 4 , Figure 5The outer cylinder 20 also has a reduced diameter section 202 on its side wall. The reduced diameter section 202 is located near the first end of the outer cylinder 20, and the distance between the end of the reduced diameter section 202 near the first end and the first end is not greater than the thickness of the partition plate 210. The partition plate 210 is inserted into the outer cylinder 20. Specifically, the partition plate 210 is a circular plate, and a vent hole 2101 is cut in the middle area corresponding to the outer cylinder 20. The partition plate 210 can be guided and inserted into the inner circumferential surface of the outer cylinder 20. In this application, the first end is the end where the outer cylinder 20 is connected to the first pipe 1 during use. The reduced diameter section 202 is rolled on the side wall of the first cylinder near the first end. The end of the reduced diameter section 202 can abut against the partition plate 210 and limit its position. (Refer to...) Figure 7 After the outer cylinder 20 is installed with the first tube 1, the lower end of the first tube 1 provides a downward limiting force to the partition 210. The reduced diameter section 202 and the lower end of the first tube 1 limit the partition 210, ensuring the normal operation of the pre-dust removal device 2. When internal cleaning is required, the first tube 1 is pulled out from the reduced diameter section 202 at the first end of the outer cylinder 20, the partition 210 is pulled up and removed for cleaning, and then it can be reinstalled. Further, as a specific embodiment, refer to... Figure 6 , Figure 7 An annular gasket 23 is inserted into the expanded diameter portion 201 at the first end. The annular gasket 23 consists of a rigid body 231 and a flexible sealing gasket 230, with the flexible sealing gasket 230 disposed on the side of the rigid body 231 away from the reduced diameter portion 202. Specifically, the annular gasket 23 includes a rigid body 231 made of steel and an annular gasket 23 disposed on the upper surface of the rigid body 231. The material of the annular gasket 23 can be either glass wool or ceramic fiber. Through this arrangement, the rigid body 231 can abut against the partition 210 and compensate for the tapered area where the expanded diameter portion 201 connects to the first end. When the outer cylinder 20 is inserted and assembled with the first tube 1, the end of the first tube 1 can abut against the upper surface of the rigid body 231, and then transmit force to the partition 210, ensuring that the first tube 1 can provide effective limiting for the partition 210. The annular gasket 23 abuts against the end of the first tube 1, improving airtightness. Furthermore, as a specific implementation method, the specific structure of the fastening structure adopted in this application is as follows: (Refer to...) Figure 6 , Figure 7The outer cylinder 20 has multiple hooks 22 welded to the outer circumferential surface of the expanded diameter portion 201 at the first end. These hooks 22 are evenly spaced around the axis of the outer cylinder 20. Specifically, each hook 22 is a rigid hook. By providing the hook, a movable buckle 10 adapted to the hook can be provided on the outer wall of the first tube 1, thus forming a detachable fastening structure. This facilitates the detachment of the outer cylinder 20 and the first tube 1, and facilitates later maintenance. Further, in a specific embodiment, the inner cylinder 211 is coaxially arranged with the outer cylinder 20, and the inner cylinder 211 is fixedly connected to the bottom plate 212 and the partition plate 210. Further, in a specific embodiment, the expanded diameter portion 201 at the first end is inserted into and fitted with the first tube 1, which is provided with movable buckles 10 that engage with the multiple hooks 22. Specifically, the fastening structure also includes movable buckles 10 provided on the outer circumferential surface of the first tube 1. Figure 7 The movable buckle 10 is a commonly used fastening structure in the prior art, which can be fastened and matched with the hanging part 22. The specific structure of the movable buckle 10 will not be described in detail here. Those skilled in the art should understand that this setting facilitates the fastening and matching of the first tube 1 and the outer cylinder 20.

[0037] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A small-scale composite pre-dust removal device, characterized in that, include: The outer cylinder (20) is rigidly set and has a partition (210) inside. The inner cylinder (211) is located inside the outer cylinder (20), with one end connected to the partition (210), and at least one first hole (213) is provided on the side wall. The bottom plate (212) is located at the other end of the inner cylinder (211) and has a second hole (2120) through it. The partition (210) is also provided with a vent (2101) that communicates with the interior of the inner cylinder (211).

2. The small-scale composite pre-dust removal device according to claim 1, characterized in that, Both ends of the outer cylinder (20) are provided with enlarged diameter sections (201).

3. The small-scale composite pre-dust removal device according to claim 2, characterized in that, The outer cylinder (20) is also provided with a reduced diameter section (202) on its side wall. The reduced diameter section (202) is provided near the first end of the outer cylinder (20), and the distance between the end of the reduced diameter section (202) near the first end and the first end is not greater than the thickness of the partition plate (210). The partition plate (210) is inserted into the outer cylinder (20).

4. The small-scale composite pre-dust removal device according to claim 3, characterized in that, An annular gasket (23) is also inserted into the expanded diameter portion (201) at the first end. The annular gasket (23) has a rigid body (231) and a flexible sealing gasket (230). The flexible sealing gasket (230) is disposed on the side of the rigid body (231) away from the reduced diameter portion (202).

5. The small-scale composite pre-dust removal device according to any one of claims 2-4, characterized in that, Multiple hangers (22) are also provided on the outer peripheral surface of the expanded diameter portion (201) at the first end, and the multiple hangers (22) are evenly spaced around the axis of the outer cylinder (20).

6. The small-scale composite pre-dust removal device according to claim 5, characterized in that, The inner cylinder (211) is coaxially arranged with the outer cylinder (20), and the inner cylinder (211) is fixedly connected to the bottom plate (212) and the partition plate (210).

7. The small-scale composite pre-dust removal device according to claim 6, characterized in that, The first end has an enlarged diameter portion (201) that is inserted into a first tube (1), and the first tube (1) is provided with a movable buckle (10) that is engaged with a plurality of the hanging parts (22).

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