WO2021042412A1

WO2021042412A1 - Double-layer flue dust collecting hood and use method thereof

Info

Publication number: WO2021042412A1
Application number: PCT/CN2019/106455
Authority: WO
Inventors: 吕永鹏; 舒刚; 王勇纲
Original assignee: 中冶南方工程技术有限公司
Priority date: 2019-09-02
Filing date: 2019-09-18
Publication date: 2021-03-11
Also published as: CN110449437A; CN110449437B

Abstract

A double-layer flue dust collecting hood and a use method thereof. The double-layer flue dust collecting hood comprises an upper hood body (2) and a lower hood body (1); a hoisting hole (11) adapted to hoist process equipment is formed at the top of the lower hood body (1); the upper hood body (2) comprises a fixed flue dust hood body (22) and a movable flue dust hood body (21); the fixed flue dust hood body (22) is fixedly mounted at the top of the lower hood body (1) and connected to a dust removal pipe (3); the movable flue dust hood body (21) is movably arranged at the top of the lower hood body (1), and is thus provided with a working state in which the movable flue dust hood body (21) covers the hoisting hole (11) and is communicated with the fixed flue dust hood body (22) and a non-working state in which the movable flue dust hood body (21) moves away from the hoisting hole (11). According to the double-layer flue dust collecting hood, the collecting hood is layered, and the upper hood body (2) uses a structure in which the fixed flue dust hood body (22) matches the movable flue dust hood body (21); by switching the movable flue dust hood body (21) between the working state and the non-working state, the working condition requirement for hoisting and maintaining the process equipment can be met, and smooth development of production and maintenance is guaranteed.

Description

Double-layer smoke and dust collecting hood and its use method

Technical field

The invention belongs to the technical field of dust removal, and specifically relates to a double-layer smoke and dust collecting hood and a use method thereof.

Background technique

In the production process of steel, chemical industry and other fields, a lot of smoke and dust are often generated. In order to protect operators from smoke and dust and reduce environmental pollution, it is necessary to set up smoke and dust collection hoods at each smoke and dust generation place. Due to the fact that some dust emission equipment produces more dust, it is necessary to set up a relatively large dust hood to cover the entire process dust generation equipment to capture the smoke and dust, but after all the dust generation equipment is covered, the process equipment cannot be used in the workshop Lifting and hoisting equipment shall be overhauled and hoisted. In addition, due to the large volume of the large smoke and dust collecting hood, it is difficult to control the exhaust air volume in different areas of the smoke hood, and the dust collecting effect is poor.

Summary of the invention

The embodiment of the present invention relates to a double-layer smoke and dust collecting hood and a method of use thereof, which can at least solve part of the defects of the prior art.

The embodiment of the present invention relates to a double-layer smoke and dust collection cover, including an upper cover body and a lower cover body. The top of the lower cover body is provided with a lifting hole suitable for hoisting process equipment, and the upper cover body includes a fixed smoke cover. And a movable hood, the fixed hood is fixedly installed on the top of the lower hood and connected with a dust removal pipe, and the movable hood can be movably arranged on the top of the lower hood so as to have a cover attached to the hanging hole The working state of the upper and communicating with the fixed hood and the non-working state deviating from the hanging hole.

As one of the embodiments, the movable hood is slidably arranged on the top of the lower hood and is equipped with a horizontal sliding drive mechanism for the hood.

As one of the embodiments, in the horizontal sliding direction of the movable hood, the length of the lower hood is greater than the length of the upper hood, and the non-working position of the movable hood is located far from the hanging hole. The side of the fixed hood.

As one of the embodiments, in the horizontal sliding direction of the movable hood, the length of the lower hood is not greater than the length of the upper hood, and in the non-working state, the movable hood accommodates In the fixed hood or the fixed hood is contained in the movable hood.

As one of the embodiments, the hood cavity of the fixed fume hood and the hood cavity of the lower-layer hood are separated by a ventilation baffle, and the ventilation baffle is provided with ventilation holes.

As one of the embodiments, the ventilation baffle includes a fixed plate and a movable plate that are stacked, and both the fixed plate and the movable plate are provided with a plurality of ventilation holes, and the movable plate is arranged on the fixed hood On the side plate of the lower cover or on the side plate of the lower cover, the movable plate is connected with a partition push-pull driving mechanism so that the overlapping area of the movable plate and the exhaust holes on the fixed plate is adjustable.

As one of the embodiments, the ventilation baffle includes a fixed plate and a movable plate that are stacked, and the fixed plate is provided with a plurality of ventilation holes, and the movable plate is provided on the side plate of the fixed hood or is provided with On the side plate of the lower cover, the movable plate is divided into a plurality of adjusting sub-boards, and each of the adjusting sub-boards is connected with a sub-board push-pull driving unit so that the position of the fixed plate for air extraction is adjustable.

The embodiment of the present invention also relates to the use method of the above-mentioned double-layer smoke collecting hood, and the use method includes:

When it is necessary to collect smoke and dust, place the movable fume hood at its working position, and the fume and dust collected by the lower hood can enter the dust removal duct through the movable fume hood and the fixed fume hood;

When the process equipment in the trapping hood needs to be overhauled, the movable fume hood is placed in its non-working position, and the lifting equipment can hoist the process equipment through the lifting holes on the lower hood.

As one of the embodiments, the method of use further includes:

The hood cavity of the fixed fume hood is separated from the hood cavity of the lower-layer hood by a ventilation baffle,

Adjust the area of the air extraction channel on the air extraction partition to adjust the air volume distribution of the air volume drawn from the bottom of the movable hood and the air volume drawn from the bottom of the fixed hood.

As one of the embodiments, the method of use further includes:

Adjust the position of the ventilation channel on the ventilation baffle, so as to realize the control of the ventilation volume in different areas in the collecting hood.

The embodiments of the present invention have at least the following beneficial effects:

The double-layer smoke and dust collection hood provided by the present invention is arranged in layers, and the upper hood adopts a structure in which a fixed hood and a movable hood are matched, and the movable hood is switched between a working state and a non-working state. It can meet the working condition requirements of process equipment hoisting and maintenance, and ensure the smooth deployment of production and maintenance.

Description of the drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work.

Fig. 1 is a schematic top view of a double-layer smoke collecting hood provided by an embodiment of the present invention;

Figure 2 is a view from the direction A in Figure 1;

Fig. 3 is a schematic structural diagram of the movable hood in Fig. 2 when it is in a non-working position;

Fig. 4 is a cross-sectional view taken along A-A of Fig. 2;

detailed description

The following describes the technical solutions in the embodiments of the present invention clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

As shown in Figures 1 to 3, the embodiment of the present invention provides a double-layer smoke and dust collection cover, including an upper cover 2 and a lower cover 1. The top of the lower cover 1 is provided with a lifting hole suitable for hoisting process equipment 11. The upper hood 2 includes a fixed hood 22 and a movable hood 21, the fixed hood 22 is fixedly installed on the top of the lower hood 1 and is connected with a dust removal duct 3, and the movable hood 21 is movable It is arranged on the top of the lower cover body 1 so as to have a working state that is covered on the hanging hole 11 and communicates with the fixed hood 22 and a non-working state that is deviated from the hanging hole 11.

Wherein, the above-mentioned movable hood 21 can be moved/switched between the working position and the non-working position, and it may be rotatably installed on the lower hood 1. In a preferred embodiment, the movable hood 21 is slidably installed on The lower hood 1 can slide horizontally relative to the fixed hood 22 so as to be close to or away from the above-mentioned hanging hole 11. Correspondingly, the movable hood 21 is slidably disposed on the top of the lower hood 1 and is equipped with a hood Water smoothing drive mechanism.

The above-mentioned lower cover 1 is preferably suitable for arranging the process equipment inside; in one of the embodiments, the lower cover 1 is a square cover, that is, its horizontal cross-section is a square, including four side panels, two of which are The side panels are the first X-direction side panels, and the other two side panels are the first Y-direction side panels. For example, two of the first X-direction side panels are parallel to the horizontal sliding direction of the movable hood 21, and the two first X-direction side panels are parallel to the horizontal sliding direction of the movable hood 21. A Y-direction side plate surface is perpendicular to the horizontal sliding direction of the movable hood 21.

The upper hood 2 is also preferably a square hood, that is, the movable hood 21 and the fixed hood 22 are both square hoods, wherein the movable hood 21 includes a top plate, two second X-direction side plates and A second Y-direction side plate. When the movable hood 21 is in its working position, the second Y-direction side plate is located at the end of the movable hood 21 away from the fixed hood 22; the fixed hood 22 includes a top plate and two A third X-direction side plate. One end of the fixed fume hood 22 is used to connect with the movable fume hood 21, and the other end is used to connect to the dust removal pipe 3 described above.

Based on the structure that the fixed hood 22 is a square hood, as shown in Figures 1 to 3, the dust removal pipe 3 includes a main pipe section 31 and a transition section 32. The transition section 32 is a sky-circle local pipe whose square end is connected to the fixed hood. 22 is connected, and its round end is connected to the main pipe section 31.

Regarding the above-mentioned structure in which the movable hood 21 is slidably arranged on the top of the lower hood 1, a sliding rail is correspondingly provided on the top of the lower hood 1, and a walking mechanism is provided at the bottom of the movable hood 21. The existing walking mechanisms are suitable for this embodiment. In the example, for example, a roller walking mechanism driven by a motor, the specific structure will not be repeated here.

In one of the embodiments, as shown in Figures 2 and 3, in the non-working position, the movable hood 21 and the fixed hood 22 are arranged on both sides of the hanging hole 11, then, at the level of the movable hood 21 In the sliding direction, the length of the lower cover body 1 is greater than the length of the upper cover body 2, and the non-working position of the movable hood 21 is located on the side of the hanging hole 11 away from the fixed hood 22. That is, the length of the first X-direction side plate is greater than the sum of the lengths of the second X-direction side plate and the third X-direction side plate, and is more preferably not less than the length of the third X-direction side plate and twice the length of the second X-direction side plate. The sum of the lengths. In this embodiment, the height of the movable hood 21 and the fixed hood 22 are preferably the same, and the docking and sealing effect of the movable hood 21 and the fixed hood 22 is better. Wherein, the top of the lower cover body 1 on the side of the hanging hole 11 away from the fixed smoke cover 22 is sealed and arranged to ensure the smoke and dust collection effect.

In another embodiment, in the non-working position, the movable hood 21 and the fixed hood 22 are located on the same side of the hanging hole 11. Then, in the horizontal sliding direction of the movable hood 21, the lower hood The length of the body 1 is not greater than the length of the upper cover body 2. In the non-operating state, the movable hood 21 is housed in the fixed hood 22 or the fixed hood 22 is housed in the movable Inside the hood 21. This embodiment is particularly suitable for situations where the overall size of the trap cover is limited or the size of the required hanging hole 11 is relatively large. In order to ensure the tightness of the butt joint between the movable hood 21 and the fixed hood 22 when collecting smoke and dust, a dust baffle can be provided at the butt ends of the two respectively, wherein the first dust baffle on the movable hood 21 is arranged at On the inner wall and extending downward, the second dust baffle on the fixed hood 22 is arranged on the outer wall and extends upward. When the movable hood 21 slides to the working position, the two dust baffles are joined to block the two hoods. The gap between the two dust shields, or the two dust shields form a labyrinth seal structure (the bottom end of the first dust shield is located below the top of the second dust shield).

The double-layer smoke and dust collection hood provided in this embodiment is arranged in layers, and the upper hood body 2 adopts a structure in which a fixed hood 22 and a movable hood 21 cooperate, and the movable hood 21 is in working state and non-working state. Switching between states can meet the working condition requirements of process equipment hoisting and maintenance, and ensure the smooth deployment of production and maintenance.

To further optimize the above-mentioned embodiment, as shown in FIG. 4, the hood cavity of the fixed hood 22 and the hood cavity of the lower-layer hood 1 are separated by a ventilation baffle 4, and the ventilation baffle 4 is provided with a ventilation hole 41 . Part of the smoke and dust entering the fixed hood 22 enters through the movable hood 21, and the other part enters through the ventilation channel on the ventilation partition 4.

The embodiment of the present invention also provides a method of using the above-mentioned double-layer smoke collecting hood, and the method of using includes:

When it is necessary to collect smoke and dust, the movable fume hood 21 is placed in its working position, and the fume and dust collected by the lower hood body 1 can enter the dust removal duct 3 through the movable fume hood 21 and the fixed fume hood 22 ；

When the process equipment in the trapping hood needs to be overhauled, the movable fume hood 21 is placed in its non-working position, and the hoisting equipment can hoist the process equipment through the lifting holes 11 on the lower cover body 1.

Further preferably, the method of use further includes: adjusting the area of the air extraction channel on the air extraction partition 4, thereby adjusting the air volume distribution of the air volume drawn from the bottom of the movable hood 21 and the air volume drawn from the bottom of the fixed hood 22.

Further preferably, the method of use further includes: adjusting the position of the air extraction channel on the air extraction partition 4, so as to realize the control of the air extraction volume in different areas in the trap hood.

Through the above method, the amount of air extraction in different areas in the trap hood can be guided, so that the main air extraction capacity can be concentrated to the area where the smoke and dust is most severely emitted as needed, and the efficiency and effect of smoke and dust collection can be improved.

Regarding the adjustment of the area and position of the ventilation passage on the ventilation partition 4, it can be adjusted during maintenance; in other embodiments, it can be adjusted online. The following provides a preferred adjustment structure, specifically:

(1) The ventilation baffle 4 includes a fixed plate and a movable plate that are stacked, and the fixed plate and the movable plate are each provided with a plurality of ventilation holes 41, and the movable plate is provided on the fixed hood 22 On the side panel of the lower cover 1 or on the side panel of the lower cover body 1, the movable panel is connected with a partition push-pull driving mechanism so that the overlapping area of the movable panel and the ventilation hole 41 on the fixed panel is adjustable. The partition push-pull driving mechanism is arranged outside the catching cover, such as fixedly mounted on the lower cover 1 or fixedly mounted on the fixed hood 22, which can be a pneumatic cylinder, a hydraulic cylinder, a rack and pinion + motor matching structure, and the like. The above-mentioned movable board is preferably located above the fixed board, which is safe and its push-pull movement is relatively stable.

Preferably, the number of the ventilation holes 41 on the fixed plate and the movable plate are the same in number and arranged in a one-to-one correspondence. In the initial situation, the ventilation holes 41 on the fixed board and the movable board are directly opposite one by one, and the ventilation channel area on the ventilation partition 4 is the largest. When the area of the ventilation channel needs to be adjusted, the movable plate is pushed and pulled horizontally, so that the ventilation holes 41 on the movable board are misaligned with the ventilation holes 41 on the fixed board. The greater the displacement, the smaller the ventilation channel area on the ventilation partition 4 is.

(2) The ventilation baffle 4 includes a fixed plate and a movable plate that are stacked on top of each other. The fixed plate is provided with a plurality of ventilation holes 41, and the movable plate is provided on the side plate of the fixed fume hood 22 or is provided with On the side panel of the lower cover 1, the movable panel is divided into a plurality of adjusting sub-boards, and each of the adjusting sub-boards is connected with a sub-board push-pull driving unit so that the position of the fixed board for ventilation can be adjusted.

Also preferably, the movable plate is located above the fixed plate, which is safe and its push-pull movement is relatively stable. Each sub-board push-pull drive unit is arranged outside the catching cover, for example, fixedly mounted on the lower cover 1 or fixedly mounted on the fixed hood 22, which can be a pneumatic cylinder, a hydraulic cylinder, a rack and pinion + motor coordination structure, etc.

In one of the embodiments, the adjusting sub-boards are sequentially arranged along the horizontal sliding direction of the movable hood 21.

In one of the embodiments, there is no ventilation hole 41 on the above-mentioned adjusting daughter board. According to the requirements of the working conditions, the adjusting daughter board of the corresponding area is inserted into the cover to block the exhaust holes 41 of the corresponding area of the fixed plate, or the corresponding area The adjusting sub-board is pulled out of the cover to open the air extraction holes 41 in the corresponding area of the fixed board, and the area of the air-exhausting passage in the corresponding area of the fixed board can be controlled by controlling the pull-out amount of the adjusting sub-board.

In another embodiment, the above-mentioned movable plate adopts the movable plate in the above-mentioned (1) embodiment, and the movable plate is divided into a plurality of adjusting sub-boards, which can simultaneously realize the area of the exhaust passage on the exhaust partition 4 And position adjustment, and the adjustment effect is better.

The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the present invention. Within the scope of protection.

Claims

A double-layer smoke and dust collection cover, which is characterized in that it comprises an upper cover and a lower cover. The top of the lower cover is provided with hanging holes suitable for hoisting process equipment. The upper cover includes a fixed smoke cover and a lower cover. A movable hood, the fixed hood is fixedly installed on the top of the lower hood and connected with a dust removal pipe, and the movable hood can be movably arranged on the top of the lower hood so as to have a cover on the hanging hole And the working state communicating with the fixed hood and the non-working state deviating from the hanging hole.
The double-layer smoke and dust collecting hood according to claim 1, wherein the movable hood is slidably arranged on the top of the lower hood and is equipped with a horizontal sliding drive mechanism for the hood.
The double-layer smoke and dust collecting hood of claim 2, wherein in the horizontal sliding direction of the movable hood, the length of the lower hood is greater than the length of the upper hood, and the movable hood is The non-working position is located on the side of the hanging hole away from the fixed hood.
The double-layer smoke and dust collection cover of claim 2, wherein in the horizontal sliding direction of the movable smoke cover, the length of the lower cover is not greater than the length of the upper cover. In the non-working state, the movable hood is contained in the fixed hood or the fixed hood is contained in the movable hood.
The double-layer smoke and dust collection hood of claim 1, wherein the hood cavity of the fixed hood and the hood cavity of the lower hood are separated by an exhaust partition, and the exhaust partition is provided with There are ventilation holes.
The double-layer smoke and dust collecting hood according to claim 5, characterized in that: the ventilation baffle comprises a fixed plate and a movable plate which are stacked, and both the fixed plate and the movable plate are provided with a plurality of ventilation holes , The movable plate is arranged on the side plate of the fixed smoke hood or on the side plate of the lower hood, and the movable plate is connected with a partition push-pull driving mechanism so that the movable plate and the ventilation holes on the fixed plate The overlapping area is adjustable.
The double-layer smoke and dust collecting hood according to claim 5 or 6, characterized in that: the ventilation baffle comprises a fixed plate and a movable plate which are stacked, and a plurality of ventilation holes are provided on the fixed plate, and the movable The plate is arranged on the side plate of the fixed smoke hood or on the side plate of the lower cover, the movable plate is divided into a plurality of adjusting sub-boards, and each of the adjusting sub-boards is connected with a sub-board push-pull drive The position of the unit for air extraction on the fixed plate is adjustable.
The use method of the double-layer smoke and dust collecting hood according to any one of claims 1 to 7, wherein the use method comprises:

When it is necessary to collect smoke and dust, place the movable fume hood at its working position, and the fume and dust collected by the lower hood can enter the dust removal duct through the movable fume hood and the fixed fume hood;

When the process equipment in the trapping hood needs to be overhauled, the movable fume hood is placed in its non-working position, and the lifting equipment can hoist the process equipment through the lifting holes on the lower hood.
The use method of the double-layer smoke and dust collecting hood according to claim 8, wherein the use method further comprises:

The hood cavity of the fixed fume hood is separated from the hood cavity of the lower-layer hood by a ventilation baffle,

The area of the air extraction channel on the air extraction partition is adjusted to adjust the air volume distribution of the air volume drawn from the bottom of the movable hood and the air volume drawn from the bottom of the fixed hood.
The use method of the double-layer smoke and dust collecting hood according to claim 8 or 9, characterized in that, the use method further comprises:

The hood cavity of the fixed fume hood is separated from the hood cavity of the lower-layer hood by a ventilation baffle,

Adjust the position of the ventilation channel on the ventilation baffle, so as to realize the control of the ventilation volume in different areas in the collecting hood.