Bag-type dust collector for filtering electrolytic aluminum flue gas

Abstract

The utility model relates to the technical field of flue gas purification equipment, in particular to a bag-type dust collector for filtering electrolytic aluminum flue gas. A filter bag is arranged in the bag chamber; the side runner is arranged on one side of the bag chamber; the upper end part of the side runner is communicated with the air inlet channel; the side runner is vertically arranged; the flow guide structure is fixedly arranged in the side runner; the lower end part of the side runner is communicated with the lower part of the bag chamber; the box body is arranged at the top of the bag chamber; an air outlet is formed in one end of the box; supporting plates are arranged at the lower ends of the bag chambers; communication ports are formed in the middles of the supporting plates; one end of the first bluff body is arranged on the upper end face of the supporting plate. One end of the second bluff body is arranged on the lower end face of the supporting plate and located at the communicating opening. The grooves of the bluff body II and the bluff body I face opposite directions; collecting cavities are formed in the lower ends of the supporting plates; the collecting cavity is communicated with the bag chamber through the communicating opening; and the ash bucket is detachably arranged in the collecting cavity. By adopting the device, the airflow uniformity can be improved, the dust removal efficiency is improved, and the cloth bag abrasion and energy consumption are reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a flue gas purification equipment technical field especially, it is a kind of cloth bag dust collector for electrolytic aluminium flue gas filtration. BACKGROUND

[0002] Flue gas generated in the production process of electrolytic aluminium contains harmful particulate matters such as fluoride and aluminium oxide, which needs to be purified by cloth bag dust collector. The traditional cloth bag dust collector has the following defects:

[0003] 1. Uneven airflow distribution: the unreasonable design of air inlet causes airflow to directly impact the cloth bag, forming a local high flow rate area, which aggravates the cloth bag wear and reduces the dust removal efficiency.

[0004] 2. High energy consumption: uneven airflow distribution leads to increased filtration resistance and significantly increased energy consumption.

[0005] 3. High maintenance cost: the cloth bag and equipment components are frequently damaged due to airflow scouring and need to be frequently replaced.

[0006] Although the prior art attempts to improve airflow by adjusting the air inlet or adding baffles, it fails to effectively eliminate the large vortex and local high flow rate problem under the bag chamber. Therefore, there is an urgent need for a dust collector that can optimize airflow distribution, prolong cloth bag life and reduce energy consumption. SUMMARY

[0007] Therefore, the utility model provides a cloth bag dust collector for electrolytic aluminium flue gas filtration, mainly aiming to improve airflow uniformity, improve dust removal efficiency and reduce cloth bag wear and energy consumption.

[0008] To achieve the above-mentioned purpose, the utility model mainly provides the following technical scheme:

[0009] The embodiment of the utility model provides a cloth bag dust collector for electrolytic aluminium flue gas filtration, comprising: a bag chamber, a side flow channel, a flow guide structure, a box body, an ash bucket, a blunt body one and a blunt body two.

[0010] The bag chamber is provided with a filter bag;

[0011] The side flow channel is fixedly arranged on one side of the bag chamber;

[0012] The upper end of the side flow channel is communicated with the air inlet channel; the air inlet channel is an arc-shaped structure;

[0013] The side flow channel is vertically arranged; the width of the side flow channel is greater than the width of the air inlet channel;

[0014] The flow guide structure is fixedly arranged in the side flow channel, for uniformly and downwardly guiding the flue gas entering the air inlet channel;

[0015] The lower end of the side flow channel communicates with the lower part of the bag chamber;

[0016] The box is fixedly arranged at the top of the bag chamber; the box communicates with the bag chamber; one end of the box has an air outlet;

[0017] The lower end of the bag chamber is fixedly provided with a support plate; the middle part of the support plate has a communication port;

[0018] The blunt body one is an arc-shaped plate structure;

[0019] One end of the blunt body one is fixedly arranged at the upper end surface of the support plate; the blunt body one is at least two; at least two of the blunt body one are arranged in parallel and spaced apart;

[0020] The groove of the blunt body one faces or faces away from the side flow channel;

[0021] The blunt body two is an arc-shaped plate structure;

[0022] One end of the blunt body two is fixedly arranged at the lower end surface of the support plate and located at the communication port; the blunt body two is at least two; at least two of the blunt body two are arranged in parallel and spaced apart;

[0023] The groove of the blunt body two faces or faces away from the side flow channel;

[0024] The groove of the blunt body two faces away from the groove of the blunt body one;

[0025] The lower end of the support plate is fixedly provided with a collection cavity; the collection cavity communicates with the bag chamber through the communication port;

[0026] The hopper is detachably arranged in the collection cavity and located below the communication port.

[0027] Further, a plurality of baffles are arranged in the air inlet channel.

[0028] Further, the flow guide structure includes divergent flow guide vanes and parallel flow guide vanes;

[0029] The divergent flow guide vanes are arranged at the connection part of the air inlet channel and the side flow channel;

[0030] The parallel flow guide vanes are arranged below the divergent flow guide vanes.

[0031] Further, the width of the communication passage of the side flow channel and the bag chamber is the same as the width of the side flow channel;

[0032] Further, the support plate extends from below the bag chamber to below the side flow channel;

[0033] The support plate below the side flow channel is provided with a flow guide groove.

[0034] The flow guide grooves are uniformly and parallelly arranged and extend towards the communication passage.

[0035] By the above technical scheme, the bag filter for filtering electrolytic aluminum flue gas has at least the following advantages:

[0036] The air flow uniformity can be improved, the dust removal efficiency can be improved, the bag wear and tear and energy consumption can be reduced.

[0037] The above description is only a summary of the technical scheme of the utility model, in order to more clearly understand the technical means of the utility model, and can be implemented according to the content of the specification, the following preferred embodiments of the utility model are described in detail with the help of the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1 A front view schematic diagram of a bag filter for filtering electrolytic aluminum flue gas is provided for the embodiment of the utility model;

[0039] Figure 2 A side view schematic diagram of a bag filter for filtering electrolytic aluminum flue gas is provided for the embodiment of the utility model.

[0040] As shown in the drawings:

[0041] 1 is a bag chamber, 2 is a filter bag, 3 is a box body, 4 is an air outlet, 5 is an air inlet passage, 6 is a side flow channel, 7 is a flow guide structure, 8 is a support plate, 9 is a blunt body one, 10 is a blunt body two, 11 is a collection cavity, and 12 is a dust hopper. DETAILED DESCRIPTION

[0042] In order to further illustrate the technical means and effects adopted by the utility model to achieve the predetermined utility model purposes, the following will be combined with the drawings and the preferred embodiments to specifically describe the specific implementation, structure, features and effects according to the utility model application, as follows. In the following description, different "an embodiment" or "embodiments" do not necessarily refer to the same embodiment. In addition, the specific features, structures or characteristics in one or more embodiments can be combined in any suitable form.

[0043] For example, Figure 1 and Figure 2As shown, an embodiment of the utility model discloses a kind of cloth bag dust collector for electrolytic aluminium flue gas filtration, comprising: bag room 1, side flow channel 6, flow guide structure 7, box 3, hopper 12, blunt body one 9 and blunt body two 10;Filter bag 2 is provided in bag room 1, for filtering flue gas;Side flow channel 6 is fixedly arranged at the side of bag room 1;The upper end of side flow channel 6 is communicated with inlet channel 5;Inlet channel 5 is arc structure, for guiding flue gas into side flow channel 6, and reduce the speed of flue gas into side flow channel 6;Flue gas containing fluoride and other particulate matter is discharged from electrolytic aluminium workshop, and enters side flow channel 6 by inlet channel 5.

[0044] Multiple baffles can be staggered in inlet channel 5, flue gas collides with baffle first, and after certain guidance, it flows into side flow channel 6 again, avoiding flue gas directly impacting cloth bag, effectively improve the uniformity of airflow.

[0045] Side flow channel 6 is vertically arranged;The width of side flow channel 6 is greater than the width of inlet channel 5, to slow down the flow rate of flue gas in side flow channel 6;Flow guide structure 7 is fixedly arranged in side flow channel 6, for uniformly dispersing the flue gas entering side flow channel 6 from inlet channel 5 and guiding it downward;Preferably, flow guide structure 7 includes: divergent flow guide vane and parallel flow guide vane;Divergent flow guide vane is arranged at the connecting part of inlet channel 5 and side flow channel 6;Divergent flow guide vane is inclinedly arranged from the middle to both sides, to guide flue gas to disperse to both sides;Parallel flow guide vane is arranged below divergent flow guide vane, to guide flue gas to flow downward uniformly, avoiding turbulence and unevenness of airflow.

[0046] The lower end of side flow channel 6 is communicated with the lower part of bag room 1, so that uniform flue gas enters bag room 1.Preferably, the width of the communication passage of side flow channel 6 and bag room 1 is the same as the width of side flow channel 6, so that the airflow in side flow channel 6 can flow into bag room 1 uniformly.Filter bag 2 can be made of high-temperature acid-resistant material (such as polytetrafluoroethylene PTFE), and the specification of filter bag 2 can be set as needed, so that the surface area of filter bag 2 can provide sufficient filtering space to capture particulate matter in flue gas.

[0047] Box 3 is fixedly arranged at the top of bag room 1;Box 3 is communicated with bag room 1;One end of box 3 has gas outlet 4;Flue gas in bag room 1 flows upward, and flows out from gas outlet 4 after passing through box 3.

[0048] The lower end of bag room 1 is fixedly provided with support plate 8, for guiding flue gas to flow upward;The middle part of support plate 8 has communication port, so that dust falls into hopper 12 from the communication port.

[0049] The blunt body one 9 is an arc plate structure, one end of the blunt body one 9 is fixedly arranged on the upper end surface of the support plate 8, the blunt body one 9 is at least two, the at least two blunt body ones 9 are arranged in parallel and are spaced, the recess of the blunt body one 9 faces or faces away from the side flow channel 6, so that the airflow movement direction of the bottom of the bag chamber 1 is changed, the airflow can be uniformly flowed from bottom to top by the blunt body one 9, and the vortex that can be generated below the bag chamber 1 is effectively eliminated, the airflow distribution in the bag chamber 1 becomes more uniform, the local airflow speed is avoided to be too high or uneven, the wear of the cloth bag is reduced, and the dust removal efficiency is improved.

[0050] The blunt body two 10 is an arc plate structure, one end of the blunt body two 10 is fixedly arranged on the lower end surface of the support plate 8 and is located at the communication port, the blunt body two 10 is at least two, the at least two blunt body twos 10 are arranged in parallel and are spaced, the recess of the blunt body two 10 faces or faces away from the side flow channel 6, and the recess of the blunt body two 10 faces away from the recess of the blunt body one 9, so that the vortex generated at the communication port is reduced.

[0051] The lower end of the support plate 8 is fixedly provided with a collecting cavity 11, the collecting cavity 11 is communicated with the bag chamber 1 through the communication port, so that the dust falls, and a dust hopper 12 is detachably arranged in the collecting cavity 11 and located below the communication port, for collecting the dust. The dust hopper 12 can be conveyed into an external storage device through a dust discharging device, the dust discharging device adopts a pneumatic conveying mode, can effectively reduce manual intervention, and improves the automation degree of the equipment.

[0052] An embodiment of the utility model discloses a cloth bag dust collector for electrolytic aluminum flue gas filtration, which can improve airflow uniformity, improve dust removal efficiency, reduce cloth bag wear and tear and energy consumption.

[0053] An embodiment of the utility model discloses a cloth bag dust collector for electrolytic aluminum flue gas filtration, which can effectively treat fluorides and other small particles in flue gas and has good economic benefits.

[0054] Preferably, the support plate 8 extends from below the bag chamber 1 to below the side flow channel 6, the support plate 8 below the side flow channel 6 is provided with a flow guide groove, the flow guide grooves are uniformly and parallelly arranged and extend towards the communication passage, so that the airflow flowing downwards from the side flow channel 6 can be uniformly flowed under the block and guidance of the support plate 8.

[0055] Further, it will be appreciated that, as used herein, the terminology or description "first", "second", and / or the like, are not intended to limit the scope of the example embodiments or the appended claims to only a single iteration. For example, the term "first" can be used to describe a component that is either directly or indirectly positioned in a first position, and the term "second" can be used to describe another component that is either directly or indirectly positioned in a second position, which can be the same or different from the first position. Similarly, the term "second" can be used to describe a component that is either directly or indirectly positioned in a first position, and the term "first" can be used to describe another component that is either directly or indirectly positioned in a second position, which can be the same or different from the first position. In this manner, the use of the terms "first" and "second" can be interchanged depending on the context.

[0056] In the description of the present application, unless otherwise explicitly defined and limited, the terms "mounting", "connecting", "connecting", "fixing" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0057] The standard parts used in the present application can be purchased from the market, and the special-shaped parts can be ordered according to the description and the drawings, and the specific connection mode of each part adopts the conventional means such as bolts, rivets and welding in the prior art, and the mechanical parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection mode in the prior art, which will not be described in detail here.

[0058] The above is only a preferred embodiment of the present application, and does not limit the present application in any form, and any simple modification, equivalent change and modification of the above embodiment according to the technical essence of the present application still belongs to the scope of the technical scheme of the present application.

Claims

1. A baghouse filter for filtering of aluminium smelter off-gas, characterized in that The bag chamber, the side flow channel, the flow guide structure, the box body, the ash chute, the blunt body one and the blunt body two are included. The filter bag is arranged in the bag chamber. The side flow channel is fixedly arranged on one side of the bag chamber. The upper end of the side flow channel is communicated with the air inlet channel. The side flow channel is vertically arranged. The width of the side flow channel is greater than the width of the air inlet channel. The flow guide structure is fixedly arranged in the side flow channel. The lower end of the side flow channel is communicated with the lower part of the bag chamber. The box body is fixedly arranged on the top of the bag chamber. The lower end of the bag chamber is fixedly provided with the support plate. The support plate is provided with the communication port in the middle part. The blunt body one is an arc-shaped plate structure. One end of the blunt body one is fixedly arranged on the upper end surface of the support plate. The blunt body one is at least two. The grooves of the blunt body one are towards or away from the side flow channel. The blunt body two is an arc-shaped plate structure. One end of the blunt body two is fixedly arranged on the lower end surface of the support plate. The blunt body two is at least two.

2. A baghouse filter for filtering of aluminium smelter off-gas according to claim 1, characterized in that The grooves of the blunt body two are towards or away from the side flow channel.

3. The baghouse filter for filtering of aluminum smelter off-gas according to claim 1, characterized in that, The grooves of the blunt body two are opposite to the grooves of the blunt body one. The lower end of the support plate is fixedly provided with the collection cavity. The ash chute is detachably arranged in the collection cavity.

4. A baghouse for filtering of aluminium smelter off-gas according to claim 3, characterized in that The baffles are staggered in the air inlet channel.

5. A baghouse filter for filtering of aluminium smelter off-gas according to claim 4, characterized in that The flow guide structure includes the divergent flow guide vane and the parallel flow guide vane. The divergent flow guide vane is arranged at the connection part of the air inlet channel and the side flow channel. The parallel flow guide vane is arranged below the divergent flow guide vane. The width of the communication channel of the side flow channel and the bag chamber is the same as the width of the side flow channel. The support plate extends from the lower part of the bag chamber to the lower part of the side flow channel. The flow guide groove is arranged on the support plate below the side flow channel. The flow guide grooves are uniformly and parallel arranged and extend towards the communication channel.

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