Anti-air-leakage ash removal device for rotary pulse ash removal bag-type dust collector

Abstract

The utility model relates to the technical field of dust removal equipment, in particular to an air leakage prevention dust removal device for a rotary pulse dust removal bag-type dust remover, which is characterized in that a bag dust removal fan is connected with an air storage tank through a pipeline, the air storage tank is connected with a rotary system, the rotary system is connected with a middle air pipe, and the middle air pipe is connected with a rotary blowing pipe; the rotating system comprises a motor, a sleeve, an air inlet pipe and a rotating airtight device, the motor is in transmission connection with the sleeve, the top of the sleeve is connected with the bottom of the air inlet pipe through the rotating airtight device, the bottom of the sleeve is connected with the middle air pipe, and the sleeve and the air inlet pipe are connected through a stepped airtight ring. The air leakage condition can be avoided in the rotating process of the equipment, and the condensation phenomenon is prevented, so that the cost is reduced, the power consumption is reduced, and the long-term stable operation of the equipment is ensured.

Description

Technical Field

[0001] The utility model relates to an air leakage preventing dust cleaning device for a rotary pulse dust cleaning bag dust collector, and relates to the technical field of dust removal equipment. Background Art

[0002] The rotary pulse cleaning equipment is a cleaning device for bag dust collectors. Its function is to remove the dust adsorbed on the bags and make it fall into the ash hopper of the dust collector to achieve the cleaning function.

[0003] In the flue gas treatment project of steel sintering machines, taking the circulating fluidized bed semi-dry desulfurization and dust removal process as an example, it is necessary to arrange more cleaning devices and use them in conjunction with the dust collector, and the gas consumption used for cleaning needs to be calculated more accurately. However, the cleaning device of the existing equipment will leak between its sleeve and the air inlet pipe during the rotation process. Therefore, in order to ensure sufficient gas volume, a larger volume gas storage tank is required. Since the inlet flue gas temperature of the bag filter is relatively high, condensed water will be generated after leakage between the sleeve of the cleaning device and the air inlet pipe, which will affect the normal operation of the equipment. Therefore, an anti-leakage cleaning device for a rotary pulse cleaning bag filter is proposed to solve the problems existing in the prior art. Utility Model Content

[0004] The purpose of the utility model is to provide an anti-leakage cleaning device for a rotary pulse cleaning bag dust collector in response to the defects or shortcomings in the prior art. By arranging a stepped airtight ring connecting the sleeve and the air inlet pipe, it can ensure that the equipment will not leak during rotation and prevent the occurrence of condensation, thereby reducing costs, reducing power consumption, and ensuring long-term stable operation of the equipment.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: it includes a bag-type cleaning fan 1, an air storage tank 3, a rotating system 5, an intermediate air pipe 7, and a rotating blowing pipe 8. The bag-type cleaning fan 1 is connected to the air storage tank 3 through a pipeline, the air storage tank 3 is connected to the rotating system 5, the rotating system 5 is connected to the intermediate air pipe 7, the intermediate air pipe 7 is connected to the rotating blowing pipe 8, the rotating system 5 includes a motor 51, a sleeve 54, an air inlet pipe 55, and a rotating airtight device 56. The motor 51 is transmission-connected to the sleeve 54, the top of the sleeve 54 is connected to the bottom of the air inlet pipe 55 through the rotating airtight device 56, and the bottom of the sleeve 54 is connected to the intermediate air pipe 7.

[0006] Furthermore, the rotating system 5 also includes a gearbox 4, a pinion 52, and a large gear 53, wherein the pinion 52 and the large gear 53 are arranged at the bottom of the gearbox 4, wherein the pinion 52 is a driving gear connected to the output shaft of the motor 51, and the large gear 53 is a driven gear fixed to the bottom of the sleeve 54 and meshed with the pinion 52.

[0007] Furthermore, the large gear 53 includes an inner ring 531 and an outer ring 533 . Balls 532 are arranged around the inner ring and are rollingly connected to the outer ring 533 . The outer ring 533 is a gear ring meshing with the pinion 52 , and the outer ring 533 is connected to the sleeve 54 by bolts.

[0008] Furthermore, the cross-section of the rotating airtight device 56 is a stepped structure, the inner diameter of the top opening is smaller than the inner diameter of the bottom opening, the top opening portion is rotatably connected to the air outlet pipe portion at the bottom of the gas storage tank 3, and the bottom opening portion is connected to the top of the sleeve 54 via a fixing bolt 57.

[0009] Furthermore, the rotating airtight device 56 is a polytetrafluoroethylene sealing ring.

[0010] Furthermore, a pulse valve 2 is provided on the top of the gas storage tank 3 .

[0011] Furthermore, the top of the intermediate air pipe 7 is connected to the bottom of the sleeve 54 by bolts.

[0012] Furthermore, a plurality of blowing heads 81 are provided at the bottom of the rotating blowing tube 8 .

[0013] After adopting the above technical scheme, the beneficial effect of the utility model is: by setting a stepped airtight ring connecting the sleeve and the air inlet pipe, it can ensure that the equipment will not leak during rotation and prevent the occurrence of condensation, thereby reducing costs, reducing power consumption, and ensuring long-term stable operation of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0015] Figure 1 It is a structural schematic diagram of the utility model;

[0016] Figure 2 It is a structural schematic diagram of the rotating system 5 in the utility model;

[0017] Figure 3 It is a top view of the rotary airtight device 56 in the utility model;

[0018] Figure 4 yes Figure 3 Cross-sectional diagram

[0019] Figure 5 It is a schematic diagram of the structure of the large gear 53 in the utility model;

[0020] Figure 6 yes Figure 5 Top view of the .

[0021] Explanation of the reference numerals: bag-type cleaning fan 1, pulse valve 2, air storage tank 3, gear box 4, rotating system 5, bracket 6, intermediate air pipe 7, rotating spray pipe 8, motor 51, small gear 52, large gear 53, sleeve 54, air inlet pipe 55, rotating airtight device 56, fixing bolt 57, spray head 81. DETAILED DESCRIPTION

[0022] See also Figure 1-6 As shown, the technical solution adopted in this specific embodiment is: it includes a bag-cleaning fan 1, an air storage tank 3, a rotating system 5, an intermediate air pipe 7, and a rotating blowing pipe 8. The bag-cleaning fan 1 is connected to the air storage tank 3 through a pipeline, the air storage tank 3 is connected to the rotating system 5, the rotating system 5 is connected to the intermediate air pipe 7, the intermediate air pipe 7 is connected to the rotating blowing pipe 8, the rotating system 5 includes a motor 51, a sleeve 54, an air inlet pipe 55, and a rotating airtight device 56. The motor 51 is connected to the sleeve 54 in a transmission manner, and the sleeve 5 The top of the bag filter 54 is connected to the bottom of the air inlet pipe 55 through a rotating airtight device 56, and the bottom of the sleeve 54 is connected to the middle air pipe 7. Since the air inlet pipe is fixedly connected to the air storage pipe, and the sleeve and the air inlet pipe are rotatably connected, a gap must be provided during design to ensure the normal operation of the equipment. A gap will cause gas with a certain temperature and pressure to leak from the gap. The dust cleaning equipment is installed on the top of the bag filter, which is an exposed installation. This will cause the dust cleaning gas to leak and collide with the air, and condensation will occur at the connection position between the sleeve and the air inlet pipe, especially in the winter in the north. The operation state of the equipment is particularly obvious. Therefore, in this embodiment, a rotating airtight device is used for sealing. The rotating airtight device 56 is a polytetrafluoroethylene sealing ring, which has the characteristics of high temperature resistance, low temperature resistance, corrosion resistance, high lubrication, non-adhesion, high wear resistance, airtightness, etc., so that the sleeve 54 and the air inlet pipe 55 can rotate smoothly when relative rotation occurs, and have good airtightness, thereby obtaining an anti-leakage effect and preventing the occurrence of condensation. In the case of no leakage, the dust cleaning fan does not need to increase the wind pressure. Increase the air volume to ensure the cleaning effect. Take the installation of 16 sets of cleaning equipment as an example. The cleaning equipment sprays once every 8 seconds, which is a very intensive operation state. Through calculation, the air volume selection of the bag cleaning fan can be reduced by about 10%. Since the bag cleaning fan is a Roots blower, the full pressure design of the fan is 95kpa, and the normal cleaning pressure should reach 75-85kpa. Therefore, every reduction in the air volume selection will bring about a change in the motor power, thereby further reducing the motor power of the cleaning fan, saving energy and reducing consumption;

[0023] In addition, the gas storage volume of each gas tank can be reduced by about 3.5% based on precise calculations, thereby reducing the amount of steel used in the gas tank. Since the working state of the cleaning equipment is <0.1 MPa, it is an ultra-low pressure. According to TSG21-2016 "Regulations on Safety Technical Supervision of Stationary Pressure Vessels", <0.1 MPa does not belong to the category of pressure vessels and is designed and produced as conventional containers, thereby further reducing production costs.

[0024] More specifically, the rotating system 5 also includes a gearbox 4, a pinion 52, and a large gear 53. The pinion 52 and the large gear 53 are arranged at the bottom of the gearbox 4, wherein the pinion 52 is a driving gear connected to the output shaft of the motor 51, and the large gear 53 is a driven gear fixed to the bottom of the sleeve 54 and meshed with the pinion 52. More specifically, the large gear 53 includes an inner ring 531 and an outer ring 533. Balls 532 are arranged around the inner ring and are rollingly connected to the outer ring 533. The outer ring 533 is a gear ring meshed with the pinion 52, and the outer ring 533 is connected to the sleeve 54 by bolts. In this embodiment, the motor output speed in the rotating system is 1.1 rpm, and then through the 1:3 reduction ratio of the pinion and the large gear, the final sleeve speed is 0.3667 rpm, which is an extremely low speed rotation, so that the rotating airtight device can obtain the best airtight effect.

[0025] To be more specific, the cross-section of the rotating airtight device 56 is a stepped structure, the inner diameter of the top opening is smaller than the inner diameter of the bottom opening, the top opening portion is rotatably connected to the air outlet pipe portion at the bottom of the gas storage tank 3, and the bottom opening portion is connected to the top of the sleeve 54 by a fixing bolt 57. The sealed connection of the stepped rotating airtight device effectively ensures the airtightness of the connection between the air inlet pipe and the sleeve, thereby ensuring long-term stable operation of the equipment.

[0026] To be more specific, a pulse valve 2 is provided on the top of the gas storage tank 3, and the pulse valve is connected to the gas outlet pipe inside the gas storage tank. By adjusting the opening and closing time of the pulse valve, the gas in the gas storage tank can enter the injection pipe to realize the injection cleaning function.

[0027] More specifically, the top of the intermediate air pipe 7 is connected to the bottom of the sleeve 54 by bolts, so that the sleeve and the intermediate air pipe rotate together. The entire rotating system is fixed to the bracket 6 and supported by the bracket, which is fixed to the external installation location. The driving of the intermediate air pipe and the rotating blow pipe is achieved by the large gear driving the rotation of the sleeve.

[0028] More specifically, a plurality of blowing heads 81 are provided at the bottom of the rotating blowing tube 8, and the airflow in the blowing tube is evenly blown through the blowing heads to obtain a better directional blowing and dust removal effect.

[0029] The working principle of the utility model is as follows: in the rotating system 5, the air inlet pipe 55 is fixedly connected to the air storage tank 3, the sleeve 54 is driven to rotate by the motor 51, and drives the intermediate air pipe 7 to rotate, so that the rotating blowing pipe 8 rotates together, and since the rotating airtight device 56 is a polytetrafluoroethylene sealing ring, it has the characteristics of high temperature resistance, low temperature resistance, corrosion resistance, high lubrication, non-adhesion, high wear resistance, air tightness, etc., so that the sleeve 54 and the air inlet pipe 55 can rotate smoothly when relative rotation occurs, and have good air tightness, thereby obtaining an anti-leakage effect, preventing the occurrence of condensation, and ensuring that the equipment can operate stably for a long time.

[0030] The above description is only used to illustrate the technical solution of the utility model rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the utility model by ordinary technicians in this field should be included in the scope of the claims of the utility model as long as they do not depart from the spirit and scope of the technical solution of the utility model.

Claims

1. A device for preventing air leakage and cleaning for a rotary pulse cleaning bag filter, characterized in that: It comprises a bag-type dust-cleaning fan (1), an air storage tank (3), a rotating system (5), an intermediate air pipe (7), and a rotating blowing pipe (8). The bag-type dust-cleaning fan (1) is connected to the air storage tank (3) through a pipeline, the air storage tank (3) is connected to the rotating system (5), the rotating system (5) is connected to the intermediate air pipe (7), the intermediate air pipe (7) is connected to the rotating blowing pipe (8), and the rotating system (5) comprises a motor (51), a sleeve (54), an air inlet pipe (55), a rotating airtight device ( 56), the motor (51) is drivingly connected to the sleeve (54), the top of the sleeve (54) is connected to the bottom of the air inlet pipe (55) through a rotating airtight device (56), and the bottom of the sleeve (54) is connected to the intermediate air pipe (7), the cross section of the rotating airtight device (56) is a stepped structure, the inner diameter of the top opening is smaller than the inner diameter of the bottom opening, the top opening part is rotatably connected to the air outlet pipe part at the bottom of the air storage tank (3), and the bottom opening part is connected to the top of the sleeve (54) through a fixing bolt (57).

2. The anti-leakage cleaning device for a rotary pulse cleaning bag dust collector according to claim 1 is characterized in that: The rotating system (5) further comprises a gearbox (4), a pinion (52), and a large gear (53), wherein the pinion (52) and the large gear (53) are arranged at the bottom of the gearbox (4), wherein the pinion (52) is a driving gear connected to the output shaft of the motor (51), and the large gear (53) is a driven gear fixed to the bottom of the sleeve (54) and meshing with the pinion (52).

3. The anti-leakage cleaning device for a rotary pulse cleaning bag dust collector according to claim 2 is characterized in that: The large gear (53) comprises an inner ring (531) and an outer ring (533). Balls (532) are arranged around the inner ring and are rollingly connected to the outer ring (533). The outer ring (533) is a gear ring meshing with the small gear (52), and the outer ring (533) is connected to the sleeve (54) by bolts.

4. The anti-leakage cleaning device for a rotary pulse cleaning bag dust collector according to claim 1, characterized in that: The rotating airtight device (56) is a polytetrafluoroethylene sealing ring.

5. The anti-leakage cleaning device for a rotary pulse cleaning bag dust collector according to claim 1, characterized in that: A pulse valve (2) is arranged on the top of the gas storage tank (3).

6. The anti-leakage cleaning device for a rotary pulse cleaning bag dust collector according to claim 1, characterized in that: The top of the intermediate air pipe (7) is connected to the bottom of the sleeve (54) by bolts.

7. The anti-leakage cleaning device for a rotary pulse cleaning bag dust collector according to claim 1, characterized in that: A plurality of blowing heads (81) are arranged at the bottom of the rotating blowing tube (8).

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