Bag-type dust collector

Abstract

The bag-type dust collector provided by the utility model comprises a dust hopper, a middle box body, an upper box body, an air inlet flue, a filter bag, a pulse injection device and a maintenance system, the dust hopper, the middle box body and the upper box body are communicated with each other, the dust hopper is communicated with the air inlet flue, and the filter bag is communicated with the pulse injection device. The ash hopper is used for carrying out primary dust removal on flue gas entering from the air inlet flue; a tubesheet is arranged at the bottom of the upper box body, the filter bag is fixed on the tubesheet, and the filter bag is used for purifying flue gas subjected to primary dust removal; the pulse blowing device is used for carrying out dust removal treatment on the filter bag subjected to purification treatment; and the maintenance and inspection system is used for carrying out online maintenance and inspection treatment on the filter bag. By utilizing the bag-type dust collector, the problems of high resistance, short service life of a filter bag and the like of the traditional bag-type dust collector can be solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to flue gas treatment environmental protection equipment technical field, more specifically, relate to a straight through formula low resistance cloth bag dust collector. BACKGROUND

[0002] In steel metallurgy, coal-fired power plant, cement kiln and many other production fields, cloth bag dust collector as a kind of efficient dust removal technology has extremely extensive application. At present, widely used high-efficiency bag type dust removal equipment-long bag low pressure pulse bag type dust collector, cloth bag dust collector structure form is the design of split box, that is, cloth bag dust collector is composed of several independent chambers, each chamber independently inlet and outlet and is equipped with inlet valve and lift valve. The resistance of this dust collector design form is relatively large, and the conventional operation resistance is about 1200Pa-1500Pa, which makes the subsequent induced draft fan energy consumption larger, and the box structure of the existing cloth bag dust collector is smaller, each independent sub-chamber arranged in the box, which cannot provide enough space for intelligent detection of leak bag and maintenance inspection work.

[0003] In addition, the inlet of the existing cloth bag dust collector is designed in the front of the middle of the dust collector, and the high-speed airflow directly blows the filter bag, which causes serious wear and damage of the filter bag. The design of the flue gas inlet causes the airflow to be difficult to be evenly distributed in the box, and the filter bag in each area has different filtering wind speed, and the air volume distribution is unbalanced, so stable filtration cannot be achieved. SUMMARY

[0004] In view of the above problems, the utility model aims at providing a cloth bag dust collector to solve the problems of high resistance of traditional cloth bag dust collector, low service life of filter bag and the like.

[0005] The utility model provides a cloth bag dust collector, which comprises an ash bucket, a middle box arranged above the ash bucket, an upper box arranged above the middle box, an air inlet flue arranged at one side of the bottom of the middle box, filter bags suspended in the middle box, a pulse blowing device arranged in the upper box and a maintenance inspection system, the ash bucket, the middle box and the upper box are in communication with each other, wherein,

[0006] The ash bucket is in communication with the air inlet flue, and the ash bucket is used for preliminarily dust collecting flue gas entering from the air inlet flue.

[0007] A flower plate is arranged at the bottom of the upper box, the filter bags are fixed on the flower plate, and the filter bags are used for purifying flue gas after preliminary dust collection.

[0008] The pulse blowing device is used for cleaning the filter bags after purification.

[0009] The maintenance inspection system is used for online maintenance inspection of the filter bags.

[0010] Preferably, the air inlet flue is a rectangular structure, a steel plate is arranged on the side wall inside the air inlet flue, and a first flow guide arc-shaped plate is arranged on the steel plate in a slanting manner, and each first flow guide arc-shaped plate is arranged in a spaced manner.

[0011] The first flow guide arc-shaped plate is used for guiding the flue gas of the air inlet flue into the ash bucket.

[0012] Preferably, the middle box body is a straight-through structure, and the filter bags are uniformly suspended in the middle box body.

[0013] Preferably, the pulse blowing device comprises a blowing main pipe and a blowing branch pipe movably connected with the blowing main pipe, wherein the blowing branch pipe is rotatably connected with the blowing main pipe through a rotating shaft, and the blowing branch pipe rotates at a preset angle with the rotating shaft as the origin.

[0014] Preferably, the upper box body is a straight-through structure, and a movable maintenance device is arranged in the inside of the upper box body, wherein

[0015] The movable maintenance device is used for moving to a target position according to an instruction, and intelligently detecting and maintaining the filter bags.

[0016] Preferably, the movable maintenance device comprises maintenance rails arranged on both sides of the inside of the upper box body respectively, steel beams for supporting the maintenance rails, and a movable rail car and maintenance instruments arranged in the movable rail car, wherein

[0017] The movable rail car drives the maintenance instruments to move along the maintenance rails to a target position, and the maintenance instruments intelligently detect and maintain the filter bags.

[0018] Preferably, the air outlet flue is a rectangular structure in the form of an elbow and is arranged at the tail end of the upper box body.

[0019] Preferably, a second flow guide arc-shaped plate is arranged on the side wall of the air outlet flue, wherein

[0020] The second flow guide arc-shaped plate is used for guiding the purified flue gas into the outside.

[0021] Preferably, the second flow guide arc-shaped plates are arranged in a spaced manner, and a wear-resistant angle steel for protection is arranged on each second flow guide arc-shaped plate.

[0022] Preferably, an expansion joint is arranged in the air outlet flue, wherein

[0023] The expansion joint is used for eliminating the thermal expansion stress of the air outlet flue.

[0024] From the above technical solutions can be known, the cloth bag dust collector provided by the utility model, through design of the middle box body and the upper box body as straight-through structure, can make airflow more evenly fill the whole box body, and the movable maintenance and inspection device is arranged in the upper box body, accurate detection and maintenance can be carried out on the filter bag, and operation space and conditions are provided for unmanned operation and autonomous replacement of the filter bag. Through arrangement of the air inlet flue on the side surface of the middle box body, the design of the side surface flue and the arrangement of the arc-shaped flow guide plate guide the flue gas airflow to enter the ash bucket inside uniformly, so that the scouring of the filter bag by the high-speed airflow at the inlet is avoided, and the service life of the filter bag is improved, and the straight-through structure design of the middle box body can also effectively reduce the resistance of the dust collector, and greatly reduce the system energy consumption.

[0025] To achieve the above and related objects, one or more aspects of the utility model include the features to be described in detail later. The following description and drawings describe certain exemplary aspects of the utility model. However, these aspects indicate only some of the various ways in which the principles of the utility model can be used. In addition, the utility model is intended to include all these aspects and their equivalents. BRIEF DESCRIPTION OF DRAWINGS

[0026] Other objects and results of the utility model will be more apparent and easy to understand by referring to the following description in combination with the drawings, and with a more comprehensive understanding of the utility model. In the drawings:

[0027] Figure 1 It is a top view schematic diagram of the cloth bag dust collector according to the utility model embodiment;

[0028] Figure 2 It is a front view schematic diagram of the cloth bag dust collector according to the utility model embodiment;

[0029] Figure 3 It is a left view schematic diagram of the cloth bag dust collector according to the utility model embodiment.

[0030] The reference signs therein include:

[0031] 1, air inlet flue, 2, first flow guide arc-shaped plate, 3, ash bucket, 4, middle box body, 5, filter bag, 6, flower plate, 7, pulse blowing device, 8, blowing branch pipe, 9, maintenance and inspection track, 10, movable track car, 11, air outlet flue, 12, second flow guide arc-shaped plate, 13, expansion joint.

[0032] The same reference signs in all the drawings indicate similar or corresponding features or functions. DETAILED DESCRIPTION

[0033] In the following description, numerous specific details are set forth for illustrative purposes and to provide a thorough understanding of one or more embodiments. However, it will be apparent that these embodiments may also be implemented without these specific details. In other instances, well-known structures and devices are shown in block diagram form for ease of description of one or more embodiments.

[0034] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0035] To address the aforementioned problems of high resistance and short filter bag lifespan in traditional baghouse dust collectors, this invention provides a novel baghouse dust collector.

[0036] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0037] To illustrate the structure of the bag filter provided by this utility model Figures 1 to 3 The structure of the bag filter is shown from different angles, specifically, Figure 1 A top view of the structure of a bag filter according to an embodiment of the present invention is shown; Figure 2 The main view of the bag filter according to an embodiment of the present invention is shown; Figure 3 The left view of the bag filter structure according to an embodiment of the present invention is shown.

[0038] like Figures 1 to 3The utility model provides a cloth bag dust catcher includes: ash bucket 3, set in the ash bucket 3 top middle box 4, set in the middle box 4 top upper box, set in the bottom side of the middle box 4 air inlet flue 1, the filter bag 5 that suspends in the middle box 1, set in the pulse spray device 7 and maintenance inspection system in the upper box, the ash bucket 3, the middle box 4 with the upper box intercommunication, wherein, the ash bucket 3 with the air inlet flue 1 intercommunication, the ash bucket 3 is used to carry out the primary dust removal to the flue gas that enters from the air inlet flue 1, the bottom of the upper box is provided with the flower board 6, the filter bag 5 is fixed on the flower board 6, the filter bag 5 is used to filter the flue gas that carries out the primary dust removal, the pulse spray device 7 is used to carry out the ash removal treatment to the filter bag 5 that carries out the dust removal, the maintenance inspection system is used to carry out the online maintenance inspection treatment to the filter bag 5.

[0039] In the embodiment of the utility model, when the dust-containing flue gas passes through the air inlet flue 1 and enters the straight-through middle box 4 through the ash bucket 3, the filter bag 5 uniformly suspended in the middle box 4 purifies the flue gas entering the middle box, and the purified clean flue gas enters the upper box and is discharged through the air outlet flue 11.

[0040] In the embodiment of the utility model, the air inlet flue 1 is of a rectangular structure, a steel plate is arranged on the inner side wall of the air inlet flue 1, and a first flow guide arc-shaped plate 2 is obliquely arranged on the steel plate, and each first flow guide arc-shaped plate 2 is arranged at intervals, wherein the first flow guide arc-shaped plate 2 is used to introduce the flue gas of the air inlet flue 1 into the ash bucket 3.

[0041] The lower part of the air inlet flue 1 is of an open structure, and the upper wall thereof is arranged in the form of an inclined plate, which can gradually guide the dust-containing flue gas flow to reduce the amount, balance the inlet and tail flow of the air inlet flue 1. The air inlet flue 1 is arranged below the side surface of the dust remover, the dust-containing flue gas enters the inside of the dust remover through the ash bucket 3, and this air inlet mode can avoid the scouring of the high-speed airflow at the inlet to the filter bag 5 in the inside of the dust remover, thereby prolonging the service life of the filter bag 5 and reducing the maintenance inspection frequency of the equipment. The first flow guide arc-shaped plates 2 are uniformly arranged on the inclined plate to guide the airflow to flow downward and reduce the system resistance, the first flow guide arc-shaped plates 2 are made of wear-resistant angle steel, thereby increasing the service life, and the structure of the air inlet flue 1 further reduces the flue gas flow resistance, so that the airflow is more uniform.

[0042] In the embodiment of the utility model, the middle box 4 is of a straight-through structure, and the filter bag 5 is uniformly suspended in the middle box 4. The middle box 4 is of a straight-through structure, which has no baffle to block the dust-containing flue gas, so that the dust removal resistance is greatly reduced, and the system energy consumption is effectively reduced. The filter bag 5 is fixed on the flower board 6 at the bottom of the upper box, and the dust-containing flue gas enters the upper box after being purified.

[0043] In the embodiment of the utility model, the pulse jet device 7 includes a jet main pipe, a jet branch pipe 8 movably connected with the jet main pipe, wherein the jet branch pipe 8 is rotatably connected with the jet main pipe through a rotating shaft, and the jet branch pipe 8 rotates a preset angle with the rotating shaft as the origin. In specific application, the jet branch pipe is designed as a rotatable structure, which is realized through a sealed rotating bearing, so that the pipeline system is ensured not to leak while the jet branch pipe can rotate by 120 degrees, thereby leaving a detection space when the filter bag is detected for leakage to realize accurate positioning and plugging of the filter bag 5 for leakage detection, and prevent the emission of smoke dust from exceeding the standard.

[0044] In the embodiment of the utility model, the upper box body is of a straight-through structure, and the maintenance and inspection system is movably arranged inside the upper box body, wherein the maintenance and inspection system includes maintenance and inspection tracks 9 arranged on both sides of the inside of the upper box body respectively, steel beams for supporting the maintenance and inspection tracks 9, a mobile track vehicle 10, and maintenance and inspection instruments arranged in the mobile track vehicle 10, wherein the mobile track vehicle 10 drives the maintenance and inspection instruments to move along the maintenance and inspection tracks 9 to a target position, and the maintenance and inspection instruments intelligently detect and maintain the filter bag 5. The upper box body is of a straight-through structure, which also reduces the system resistance.

[0045] In the embodiment of the utility model, the bag-type dust collector further includes an air outlet flue 11, which is of a rectangular structure in the form of an elbow and is arranged at the tail end of the upper box body. Second flow guide arc-shaped plates 12 are arranged on the side walls of the air outlet flue 11 and are arranged at intervals between the second flow guide arc-shaped plates 12, wherein the second flow guide arc-shaped plates 12 are used to guide the purified flue gas to the outside. The second flow guide arc-shaped plates 12 are arranged at intervals between them, and wear-resistant angle steels for protection are arranged on each second flow guide arc-shaped plate 12. An expansion joint 13 is arranged in the air outlet flue 11, wherein the expansion joint 13 is used to eliminate the thermal expansion stress of the air outlet flue and offset the thermal expansion stress of the pipeline to prevent the dust collector body from being damaged.

[0046] In specific application, the bag-type dust collector provided by the utility model can effectively reduce the system resistance of the dust collector body, so that the flow field inside the dust collector is more uniform and stable, thereby reducing the energy consumption of the entire dust removal system and saving operation cost, and having high energy-saving benefits. The air inlet mode adopted can avoid the scouring of high-speed airflow at the dust removal inlet on the filter bag, reduce the loss of the filter bag, prolong the service life of the filter bag, and reduce the subsequent maintenance cost of the system, which is good in economy. Moreover, the intelligent maintenance and inspection system of the upper box body can intelligently realize the detection and maintenance or replacement of the filter bag, thereby reducing labor cost.

[0047] The above only describes optional embodiments of the present application, and does not limit the patent scope of the present application, and any equivalent structural transformation or direct / indirect application in other related technical fields under the concept of the present application and using the content of the present application specification and drawings is included in the patent protection scope of the present application.

Claims

1. A baghouse filter, characterized by The bag filter comprises a dust hopper, a middle box arranged above the dust hopper, an upper box arranged above the middle box, an air inlet flue arranged at one side of the bottom of the middle box, a filter bag suspended in the middle box, a pulse blowing device arranged in the upper box, and a maintenance and inspection system, wherein the dust hopper, the middle box and the upper box are in communication with each other. The dust hopper is in communication with the air inlet flue, and the dust hopper is used for preliminarily removing dust from the flue gas entering from the air inlet flue. A flower plate is arranged at the bottom of the upper box, and the filter bag is fixed on the flower plate, and the filter bag is used for purifying the flue gas after preliminary dust removal. The pulse blowing device is used for cleaning the filter bag after purification. The maintenance and inspection system is used for online detection and maintenance of the filter bag.

2. The bag filter according to claim 1, wherein the air inlet flue is of a rectangular structure, a steel plate is arranged on the inner side wall of the air inlet flue, and a first flow guide arc-shaped plate is arranged on the steel plate in an inclined manner, and each first flow guide arc-shaped plate is arranged in a spaced manner. The first flow guide arc-shaped plate is used for guiding the flue gas in the air inlet flue into the dust hopper.

3. The bag filter according to claim 1, wherein the middle box is of a straight-through structure, and the filter bag is uniformly suspended in the middle box.

4. The bag filter according to claim 1, wherein the pulse blowing device comprises a blowing main pipe and a blowing branch pipe movably connected with the blowing main pipe, wherein the blowing branch pipe is rotatably connected with the blowing main pipe through a rotating shaft, and the blowing branch pipe rotates by a preset angle with the rotating shaft as the origin.

5. The bag filter according to claim 1, wherein the upper box is of a straight-through structure, and the maintenance and inspection system is movably arranged in the interior of the upper box, wherein the maintenance and inspection system comprises maintenance and inspection tracks arranged on both sides of the interior of the upper box respectively, steel beams for supporting the maintenance and inspection tracks, a movable track vehicle, and maintenance and inspection instruments arranged in the movable track vehicle, wherein the movable track vehicle drives the maintenance and inspection instruments to move along the maintenance and inspection tracks to a target position, and the maintenance and inspection instruments intelligently detect and maintain the filter bag.

6. The bag filter according to claim 1, further comprising an air outlet flue, wherein the air outlet flue is of a rectangular structure in the form of an elbow and is arranged at the tail end of the upper box.

7. The bag filter according to claim 6, wherein a second flow guide arc-shaped plate is arranged on the side wall of the air outlet flue, wherein the second flow guide arc-shaped plate is used for guiding the purified flue gas to the outside.

8. The bag filter according to claim 7, wherein the second flow guide arc-shaped plates are arranged in a spaced manner, and wear-resistant angle steels for protection are arranged on each second flow guide arc-shaped plate.

9. The bag filter according to claim 8, wherein an expansion joint is arranged in the air outlet flue, wherein the expansion joint is used for eliminating the thermal expansion stress of the air outlet flue. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

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