Ash bucket air inlet type bag-type dust collector with flow stabilization and noise reduction functions

Abstract

The utility model discloses an ash bucket air inlet type bag-type dust collector with flow stabilization and noise reduction functions, which comprises an upper box body, a middle box body and an ash bucket, the upper box body is simultaneously provided with a pulse valve and an injection component, the middle box body is provided with a bag cage and a filter bag, the ash bucket is provided with a flow stabilizer, a gate valve and a discharger, the ash bucket is connected with the middle box body, and the flow stabilizer is connected with the middle box body. And the steel bracket is used for supporting. The flow stabilizer is installed at the 1 / 5-1 / 6 position of the upper portion of the ash bucket, the horizontal section of the installation position is installed in the middle, the two end openings of the flow stabilizer are consistent in structure and fixed through blind plate bolts when leaving a factory, a blind plate is taken down from one side and connected with an air inlet flue when the flow stabilizer is used, and the other side of the flow stabilizer serves as an access hole. The flow stabilizer is designed according to the firearm silencer principle, the flow stabilizer is a non-universal standard part or a part known by technicians in the field, holes are evenly distributed in the side direction and the bottom of the flow stabilizer, and stable airflow output and airflow silencing and noise reduction are achieved in the working process.

Description

Technical Field

[0001] The utility model relates to a dust-containing waste gas treatment device, in particular to a hopper air inlet type bag filter with a function of stabilizing flow and reducing noise. Background Technique

[0002] A bag filter is a dry dust filtering device, which is suitable for collecting fine, dry and non-fibrous dust. Due to the advantages of low cost, high dust removal efficiency and convenient maintenance of the bag filter, it is widely used in industries such as heating, thermal power, metal smelting, and non-metallic mineral product processing. During the production and operation of enterprises, waste gases such as boiler flue gas and production tail gas generated are basically purified and treated using bag filters. However, during use, the filter bags of the dust collector are easily damaged, which is a major problem in the application of bag filters. The reasons include human factors caused by improper operation, process factors caused by improper material selection, and design factors caused by structural defects of the dust collector itself. When the flue gas enters the dust collector through the flue, due to the reasons of the inlet position and wind speed, it is easier to form a flue gas turbulence impact in a certain area. Once the filter bag is impacted by the flue gas turbulence, the filter bag in this area is easily damaged prematurely. Therefore, usually during the design of the dust collector, a baffle is set at the front end of the flue gas inlet to change the air flow direction and avoid damage to the filter bag. When designing the bag filter, the flue gas inlet position is divided into two types: box air inlet and hopper air inlet. When a baffle is set in the hopper air inlet structure during actual application, there are two defects: 1. The main functions of the hopper are to collect and store ash and discharge ash. After the baffle is set at the flue gas inlet, the flue gas turbulence reduces the impact on the upper filter bags, but increases the impact on the falling ash below, and it is easy to have secondary filtration of the dust carried by the flue gas, increasing the dust removal workload; 2. Setting a baffle at the front end of the air inlet increases the air flow pressure at the flue gas inlet, resulting in an increase in the flue gas inlet noise. Therefore, it is very necessary to solve the problems of flue gas turbulence and noise through simple design and transformation of the dust collector structure, and it is economical and practical. Content of the Utility Model

[0003] The purpose of the utility model is to provide a modified hopper air inlet type bag filter, which has the advantages of stable flow of flue gas inlet and noise reduction, solves the problem of easy secondary dust emission existing in the existing hopper air inlet type dust collector, simultaneously solves the problem of flue gas inlet noise, and is more in line with the current environmental protection management requirements.

[0004] To achieve the above object, the present utility model provides the following technical solutions: A hopper inlet type bag filter with a flow stabilizing and noise reducing function, including a steel support, a middle box body is fixedly connected to the top of the steel support, the middle box body is of a square columnar structure, a hopper assembly is fixedly connected to the bottom, the hopper assembly is of an inverted pyramid structure, a slide valve is fixedly connected to the lower end, a star discharger is fixedly connected to the lower end of the slide valve, an upper box body is fixedly connected to the upper part of the middle box body, a blowback system assembly is installed inside the upper box body, the blowback system is connected to a pulse valve, a flue gas outlet is provided on the upper box body, a cage is installed inside the middle box body, a filter bag is sleeved on the cage, a flow stabilizer is installed on the hopper, the flow stabilizer is of a tubular structure, with regularly arranged porous openings on the side and lower part, the raw flue gas is connected to the inlet of the flow stabilizer through a flue, after the flue gas is decelerated and rectified in the flow stabilizer, it smoothly flows into the hopper, the hopper is communicated with the middle box body, the flue gas enters the space of the upper box body after being filtered by the filter bag, and is discharged through the flue gas outlet.

[0005] Preferably, the ratio of the opening diameter on both sides and the bottom of the flow stabilizer to the inner hole diameter of the flow stabilizer is 1:2.8.

[0006] Preferably, the opening angle on both sides of the flow stabilizer is inclined downward by 6° from the plane.

[0007] Preferably, movable blind plates are provided at both ends of the flow stabilizer. When one end is connected to the inlet flue, the other end is closed and used as a maintenance port.

[0008] Preferably, the flow stabilizer is installed at the upper 1 / 5 - 1 / 6 position of the hopper.

[0009] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0010] In the present utility model, the raw flue gas enters from the inlet of the flow stabilizer and flows out through the openings of the flow stabilizer. The air flow velocity is reduced by 4 times, and the air flow is uniform without generating severe turbulent impact, without generating secondary dust raising for the ash falling in the hopper, and without generating turbulent impact damage to the filter bags in the box body. The raw flue gas flows out smoothly after flow stabilization, without generating air flow pressure difference and air flow reverse push at the flue gas inlet, and reducing the air flow noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 、 Figure 2 is a schematic structural diagram of the present utility model;

[0012] Figure 3 、 Figure 4 、 Figure 5 is a schematic structural diagram of the flow stabilizer of the present utility model.

[0013] In the figure: 1. Rotary air lock valve; 2. Slide gate valve; 3. Steel support; 4. Hopper; 5. Flow stabilizer; 6. Middle box body; 7. Filter cage; 8. Filter bag; 9. Upper box body; 10. Injection assembly; 11. Pulse valve. Detailed implementation mode

[0014] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention.

[0015] The rotary air lock valve 1, slide gate valve 2, steel support 3, hopper 4, middle box body 6, filter cage 7, filter bag 8, upper box body 9, injection assembly 10, and pulse valve 11 components of the present invention are all common standard parts or parts known to those skilled in the art. Moreover, the standard parts used in this application document can all be purchased from the market, and can all be customized according to the description in the specification and the drawings. Their structures and principles can all be known to those skilled in the art through technical manuals or through conventional experimental methods. The flow stabilizer 5 component of the present invention is a special component structure of this patent invention, not a common standard part or a part known to those skilled in the art.

[0016] Please refer to Figures 1 - 5 , a bag filter with a hopper air inlet type having a flow stabilizing and noise reducing function. Its flow stabilizer 5 is designed and installed with reference to the principle of a firearm silencer. When the dust collector is working, it plays a role in stabilizing the incoming air flow and at the same time reducing the air flow noise. The flow stabilizer 5 is installed at the 1 / 5 - 1 / 6 position on the upper part of the hopper, and is installed in the center of the horizontal section at the installation position. The structures of the two ports of the flow stabilizer are the same. At the time of factory shipment, both ports are fixed by blind bolts. When in use, the blind plate on one side is removed and connected to the intake flue.

[0017] When in use, the flue gas enters the flow stabilizer 5 through the flue. The flue gas forms a stable air flow and passes through the air holes of the flow stabilizer at a reduced speed and enters the hopper 4, and then enters the middle box body 6 upward through the hopper. Under the air flow pressure difference, the dust-containing flue gas is filtered by the filter bag 8. The filter bag is supported by the filter cage 7. The filtered clean flue gas enters the upper box body 9 and then is discharged through the discharge port. When working for a certain period of time, more dust accumulates on the surface of the filter bag. At this time, by setting the pulse valve 11, the accumulated dust is blown off by using the injection assembly 10. The dust falls into the hopper 4 by gravity, and the dust is discharged through the slide gate valve 2 and the rotary air lock 1.

[0018] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hopper air intake bag dust collector with flow stabilization and noise reduction function, a star-shaped discharger, a gate valve, a steel bracket, an ash hopper, a flow stabilizer, a middle box, a bag cage, a filter bag, an upper box, a spray assembly, and a pulse valve. The top of the steel bracket is fixedly connected to the middle box, the middle box is a square columnar structure, the bottom is fixedly connected to the ash hopper assembly, the ash hopper assembly is an inverted pyramid structure, the lower end is fixedly connected to the gate valve, the lower end of the gate valve is fixedly connected to the star-shaped discharger, and the upper part of the middle box is fixedly connected to the upper box. The upper box body is equipped with a spray system component, the spray system is connected to a pulse valve, the upper box body is provided with a smoke outlet, the middle box body is equipped with a bag cage, the bag cage is covered with a filter bag, the ash hopper is equipped with a flow stabilizer, the flow stabilizer is a tubular structure, and multiple holes are regularly opened on the side and the bottom. The original smoke is connected to the flow stabilizer inlet through the flue. After the smoke is decelerated and rectified in the flow stabilizer, it flows smoothly into the ash hopper. The ash hopper is connected to the middle box body, and the smoke enters the upper box body space after being filtered by the filter bag and is discharged through the smoke outlet.

2. The hopper air intake bag dust collector with steady flow and noise reduction function according to claim 1 is characterized in that: The ash hopper is equipped with a flow stabilizer, which is a cylindrical structure with holes evenly distributed on the sides and bottom. The ratio of the hole diameter to the hole diameter of the stabilizer structure port is about 1:2.

8. The side hole opening angle is 6° horizontally downward and is installed at the upper 1 / 5-1 / 6 position of the ash hopper.

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