Dust hood

Abstract

The utility model provides a dust collecting hood, comprising: a dust collecting hood body, the top surface of the dust collecting hood body having a first air outlet; a pre-dust removal chamber, the pre-dust removal chamber comprising: a pre-dust removal hood body, the bottom surface of the pre-dust removal hood body forming an opening, the pre-dust removal hood body being mounted on the top surface of the dust collecting hood body to enclose with the top surface of the dust collecting hood body to form a pre-dust removal cavity; and a spray device, the spray device being mounted on the inner wall of the pre-dust removal hood body to spray water mist into the pre-dust removal cavity; wherein the pre-dust removal hood body has a second side wall, the second side wall is offset from the first dust outlet in the horizontal direction, and the second side wall is provided with a second exhaust port connected to a dust removal system; the dust-containing gas enters the pre-dust removal cavity from the first air outlet, is dusted by the spray device, and is then output from the second exhaust port to the dust removal system.

Description

Technical Field

[0001] The utility model relates to a dust collecting hood. Background Art

[0002] With the improvement of the national environmental protection level, many industries have carried out refined management and control, requiring the installation of supporting dust removal systems in raw material processing or loading and unloading areas. The conventional practice is to add a dust hood on the top of the operation area, and then use the fan to directly pump the dust-containing gas to the dust removal equipment for treatment, and then discharge it after meeting the standards. Dust removal equipment is mostly wet dust removal equipment, and materials often accumulate inside the equipment. Alkaline substances are also prone to scaling, which causes the dust collector to be blocked and the air volume to be reduced, which in turn causes dust to overflow in the operation area and cannot meet environmental protection requirements; and dust collectors are often confined spaces, which are extremely difficult to clean and require a lot of human resources, which seriously affects production. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a dust collecting hood, which adds a pre-dust removal chamber on the dust collecting hood body, so that the dust-containing gas can be pre-dust-removed before entering the dust removal equipment, which greatly alleviates the pressure of the dust removal system.

[0004] In one embodiment of the utility model, a dust collecting hood is provided, which is characterized by comprising:

[0005] A dust collecting hood, wherein the top surface of the dust collecting hood has a first air outlet, and the bottom has a first air inlet, and dust-containing gas enters the dust collecting hood from the first air inlet;

[0006] A pre-dust removal chamber, the pre-dust removal chamber comprising:

[0007] A pre-dust removal hood, wherein the bottom surface of the pre-dust removal hood forms an opening, and the pre-dust removal hood is mounted on the top surface of the dust collecting hood to enclose the top surface of the dust collecting hood to form a pre-dust removal cavity; and

[0008] A spray device, the spray device is installed on the inner wall of the pre-dust removal cover to spray water mist into the pre-dust removal cavity;

[0009] Wherein, the pre-dust removal cover has a second side wall, the second side wall is offset from the first air outlet in the horizontal direction, and the second side wall is provided with a second exhaust port connected to the dust removal system;

[0010] The dust-containing gas enters the pre-dust removal chamber from the first gas outlet, is dust-removed by the spray device, and is output to the dust removal system from the second exhaust port.

[0011] In one embodiment, the pre-dust removal cover has:

[0012] a first side wall, the first air outlet being located between the first side wall and the second side wall; and

[0013] A top wall extending in a horizontal direction and connected between the first side wall and the second side wall;

[0014] The first side wall forms an acute angle with the horizontal direction and is inclined toward the second side wall so as to guide the dust-laden airflow to the second side wall.

[0015] In one embodiment, the spray device is installed on the inner surface of the top wall.

[0016] In one embodiment, the first air outlet has a second edge adjacent to the second side wall and a first edge away from the second side wall.

[0017] The first side wall is connected to the first edge.

[0018] In one embodiment, the pre-dust removal chamber comprises:

[0019] A water baffle is installed on the second edge, and the first air outlet is defined between the first side wall and the water baffle.

[0020] In one embodiment, in the horizontal direction, the spray device is located between the water baffle and the second side wall to avoid the first air outlet.

[0021] In one embodiment, the pre-dust removal chamber comprises:

[0022] A flushing device, the flushing device is installed on a side of the water baffle plate facing the second side wall, and provides a flushing water source for the top surface of the dust collecting hood in a direction toward the second side wall;

[0023] The second side wall is provided with a drain port connected to a water treatment system, and the drain port is not higher than the top surface of the dust collecting hood body.

[0024] In one embodiment, the top surface of the dust collecting hood forms an acute angle with the horizontal direction and slopes downward toward the second side wall.

[0025] In one embodiment, the pre-dust removal cover comprises:

[0026] An inspection port is provided on a surface of the pre-dust removal cover body different from the second side wall.

[0027] It can be seen from the above technical scheme that the dust collecting hood of this embodiment adds a pre-dust removal chamber on the dust collecting hood body, and the dust-containing gas enters the pre-dust removal chamber before being transported to the dust removal system. The pre-dust removal chamber has a large space and a slow airflow rate, so large particles of dust can settle naturally under the action of gravity. At the same time, the spray device in the pre-dust removal chamber can perform water mist washing on the dust-containing gas to further achieve the dust removal effect. After the dust-containing gas is subjected to dual treatments of natural sedimentation and water mist washing, it enters the dust removal system through the second exhaust port.

[0028] Compared with the existing solution that dust-laden gas directly enters the dust removal system, the dust collecting hood of this embodiment can pre-dust the dust-laden gas, thereby greatly reducing the content of large dust particles in the dust-laden gas, so as to reduce the processing pressure of the subsequent dust removal system. And because the dust collecting hood of this embodiment only performs simple physical treatment, its structure is simple. Compared with the cost of modifying the dust removal system, the cost of setting up the pre-dust removal chamber is very low, which can greatly reduce the cost required for environmental protection modification. Furthermore, because the dust collecting hood of this embodiment is used to reduce the content of large dust particles in the dust-laden gas, it can reduce the probability of material accumulation and other problems caused by large dust particles in the subsequent dust removal system, so as to reduce production and operation costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The following drawings are only used to illustrate and explain the present invention, and do not limit the scope of the present invention.

[0030] Figure 1 It is a structural schematic diagram of the dust collecting hood of the utility model.

[0031] Figure 2 It is a structural schematic diagram of the pre-dust removal hood in the utility model. DETAILED DESCRIPTION

[0032] In order to have a clearer understanding of the technical features, purposes and effects of the utility model, the specific implementation of the utility model is now described with reference to the accompanying drawings, in which the same reference numerals represent the same parts.

[0033] In this document, “exemplary” means “serving as an example, instance or illustration”, and any diagram or implementation described in this document as “exemplary” should not be interpreted as a more preferred or more advantageous technical solution.

[0034] In order to simplify the drawings, only the parts related to the utility model are schematically shown in each figure, and do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically drawn or marked.

[0035] In this document, “upper”, “lower”, “front”, “back”, “left”, “right”, etc. are only used to indicate the relative position relationship between related parts, rather than to limit the absolute positions of these related parts.

[0036] In this article, "first", "second", etc. are only used to distinguish each other, and do not indicate the importance and order, or the premise of each other's existence.

[0037] In this article, "equal", "same" and the like are not strictly limited in the mathematical and / or geometric sense, but also include errors that can be understood by those skilled in the art and are allowed in manufacturing or use. Unless otherwise specified, the numerical ranges herein include not only the entire range within its two endpoints, but also several sub-ranges contained therein.

[0038] Example embodiments will now be described more fully with reference to the accompanying drawings.

[0039] In order to solve the problems in the prior art, the utility model provides a dust collecting hood, which has a pre-dust removal chamber added on the dust collecting hood body, so that the dust-containing gas can be pre-dust-removed before entering the dust removal equipment, which greatly alleviates the pressure of the dust removal system.

[0040] like Figure 1 and Figure 2 As shown, one embodiment of the utility model provides a dust collecting hood, comprising:

[0041] The dust collecting hood 10 has a first air outlet 11 on the top surface and a first air inlet on the bottom, and the dust-containing gas enters the dust collecting hood 10 from the first air inlet;

[0042] Pre-dust removal chamber 20, the pre-dust removal chamber 20 comprises:

[0043] A pre-dust removal hood 21, the bottom surface of which is formed with an opening, and the pre-dust removal hood 21 is mounted on the top surface of the dust collecting hood 10 to enclose the top surface of the dust collecting hood 10 to form a pre-dust removal cavity; and

[0044] A spray device 22, which is mounted on the inner wall of the pre-dust removal cover 21 to spray water mist into the pre-dust removal cavity;

[0045] The pre-dust removal cover 21 has a second side wall 23, which is offset from the first air outlet 11 in the horizontal direction, and the second side wall 23 is provided with a second exhaust port 231 which is connected to the dust removal system;

[0046] The dust-containing gas enters the pre-dust removal chamber from the first gas outlet 11 , is dusted by the spray device 22 , and is then output to the dust removal system from the second gas outlet 231 .

[0047] Usually, in order to meet environmental protection requirements, a dust hood needs to be installed on the top of the working area of ​​the equipment or site, and then the fan directly pumps the dust-containing gas to the dust removal equipment for treatment, and then discharges it after meeting the standards. The dust hood only collects dust and does not do any treatment on the dust-containing gas. If the dust removal treatment of the dust-containing gas is only completed by the dust removal equipment, in order to achieve a good dust removal treatment effect, the modification cost of the dust removal equipment will be very high.

[0048] The dust collecting hood of this embodiment adds a pre-dust removal chamber on the dust collecting hood body. The dust-containing gas enters the pre-dust removal chamber before being transported to the dust removal system. The pre-dust removal chamber has a large space and a slow airflow rate, so large particles of dust can settle naturally under the action of gravity. At the same time, the spray device in the pre-dust removal chamber can perform water mist washing on the dust-containing gas to further achieve the dust removal effect. After the dust-containing gas is subjected to dual treatments of natural sedimentation and water mist washing, it enters the dust removal system through the second exhaust port.

[0049] Compared with the existing solution that dust-laden gas directly enters the dust removal system, the dust collecting hood of this embodiment can pre-dust the dust-laden gas, thereby greatly reducing the content of large dust particles in the dust-laden gas, so as to reduce the processing pressure of the subsequent dust removal system. And because the dust collecting hood of this embodiment only performs simple physical treatment, its structure is simple. Compared with the cost of modifying the dust removal system, the cost of setting up the pre-dust removal chamber is very low, which can greatly reduce the cost required for environmental protection modification. Furthermore, because the dust collecting hood of this embodiment is used to reduce the content of large dust particles in the dust-laden gas, it can reduce the probability of material accumulation and other problems caused by large dust particles in the subsequent dust removal system, so as to reduce production and operation costs.

[0050] In this embodiment, the pre-dust removal chamber 20 is arranged above the dust collecting hood 10, and the top surface of the dust collecting hood 10 is used as the bottom surface of the pre-dust removal chamber 20, and the pre-dust removal chamber 21 formed with the bottom surface is enclosed to form a pre-dust removal cavity. Among them, the first air outlet connecting the dust collecting hood 10 and the pre-dust removal chamber 20 is located on the top surface of the dust collecting hood 10. When the fan of the dust removal system is working, it forms a negative pressure in the pre-dust removal cavity, and the dust-containing gas in the dust collecting hood 10 enters the pre-dust removal cavity under the action of the negative pressure.

[0051] In the pre-dust removal chamber formed by the top surface of the pre-dust removal hood 21 and the dust collection hood 10, the dust-laden gas enters the pre-dust removal chamber from the first air outlet 11, leaves the pre-dust removal chamber from the second air outlet 231, and enters the subsequent dust removal system. In the horizontal direction, the second air outlet 231 is offset from the first air outlet 11, so that the dust-laden gas that enters the pre-dust removal chamber generally along the vertical direction must move a certain distance in the horizontal direction before it can leave the pre-dust removal chamber from the second air outlet 231. The horizontal movement can be used for the natural sedimentation of large dust particles and the water mist washing of dust-laden gas by the spray device.

[0052] In order to prevent the deposited dust from being carried into the dust removal system by the airflow, the second exhaust port 231 may be located at the upper portion of the second side wall 23 .

[0053] Specifically, the pre-dust removal cover 21 has:

[0054] A first side wall 24, the first air outlet 11 is located between the first side wall 24 and the second side wall 23; and

[0055] A top wall 25 extending in a horizontal direction and connected between the first side wall 24 and the second side wall 23;

[0056] The first side wall 24 forms an acute angle with the horizontal direction and is inclined toward the second side wall 23 to guide the dust-laden airflow to the second side wall 23 .

[0057] Since the second exhaust port 231 is offset from the first air outlet 11 in the horizontal direction, and the dust-containing gas generally enters the pre-dust removal chamber along the vertical direction, the pre-dust removal hood 21 forms a guide wall for guiding the dust-containing airflow to the second side wall 23 through the first side wall 24 inclined toward the second side wall 23 and the top wall 25 extending in the horizontal direction, so as to change the airflow direction from the vertical direction to the horizontal direction. The inclined first side wall 24 can prevent the dust-containing airflow from directly hitting the top wall 25 extending in the horizontal direction, causing large particles of dust to settle above the first air outlet 11, thereby falling into the dust collecting hood and then returning to the working area, but forming a transition of airflow turning in the vertical and horizontal directions. Optionally, the first side wall 24 can also be formed in the shape of an arc to facilitate the smooth change of the airflow direction from the vertical direction to the horizontal direction.

[0058] In a specific example, the first air outlet 11 has a second edge adjacent to the second side wall 23 and a first edge away from the second side wall 23 , and the first side wall 24 is connected to the first edge.

[0059] Further, the pre-dust removal chamber 20 comprises:

[0060] The water baffle plate 26 is installed on the second edge, and the first air outlet 11 is defined between the first side wall 24 and the water baffle plate 26 .

[0061] The spray device 22 is installed on the inner surface of the top wall 25 , so that in the horizontal direction, the spray device 22 is located between the water retaining plate 26 and the second side wall 23 to avoid the first air outlet 11 .

[0062] The first air outlet 11 is limited between the first side wall 24 and the water baffle 26, which can prevent the water mist generated by the spray device 22, the naturally settled large dust particles, and the sewage containing dust particles generated by the spray dust removal from entering the dust collecting hood 10 through the first air outlet 11.

[0063] In a specific example, the pre-dust removal chamber 20 further includes:

[0064] A flushing device 27, which is installed on the side of the water baffle 26 facing the second side wall 23, and provides a flushing water source for the top surface of the dust collecting hood 10 in a direction toward the second side wall 23;

[0065] The second side wall 23 is provided with a drain port 232 which is connected to the water treatment system. The drain port 232 is not higher than the top surface of the dust collecting hood body 10 .

[0066] In order to prevent sewage and naturally settled dust from accumulating on the top surface of the dust collecting hood 10, thereby causing the risk of contaminating the dust collecting hood 10 or the subsequent dust removal system, a flushing device 27 and a drain port 232 for draining sewage are further provided in the pre-dust removal chamber 20. The flushing device 27 is used to flush the top surface of the dust collecting hood 10, and the water flow direction is directional toward the drain port 232. The flushing device 27 is provided on the side of the water baffle 26 facing the second side wall 23, and the flushing direction is away from the first air outlet 11.

[0067] Preferably, the top surface of the dust collecting hood 10 forms an acute angle with the horizontal direction and slopes downward toward the second side wall 23. In the water flow direction of the flushing device 27, the downwardly inclined top surface of the dust collecting hood 10 forms a guide surface that naturally guides the water flow to the drain port 232, and also avoids the possibility of sewage flowing to the first air outlet 11. After the sewage is discharged from the drain port 232, it can be discharged through a subsequent water treatment system.

[0068] Optionally, the pre-dust removal cover 21 includes:

[0069] The inspection opening 28 is opened on a surface of the pre-dust removal cover 21 different from the second side wall.

[0070] The pre-dust cover 21 includes the first side wall, the second side wall, and the top wall shown in the figure. It can be understood that it also includes multiple side walls such as the front wall and the rear wall that are not shown in the figure. Since the second side wall is provided with an opening connected to the water treatment system and the dust removal system, it is not convenient for personnel to operate. Therefore, the inspection port 28 can be provided on any surface except the second side wall. The staff can conveniently check the operation of each device in the pre-dust cover 21 through the inspection port, and manually clean the accumulated materials in the pre-dust chamber.

[0071] It can be seen from the above technical scheme that the dust collecting hood of this embodiment adds a pre-dust removal chamber on the dust collecting hood body, and the dust-containing gas enters the pre-dust removal chamber before being transported to the dust removal system. The pre-dust removal chamber has a large space and a slow airflow rate, so large particles of dust can settle naturally under the action of gravity. At the same time, the spray device in the pre-dust removal chamber can perform water mist washing on the dust-containing gas to further achieve the dust removal effect. After the dust-containing gas is subjected to dual treatments of natural sedimentation and water mist washing, it enters the dust removal system through the second exhaust port.

[0072] Compared with the existing solution that dust-laden gas directly enters the dust removal system, the dust collecting hood of this embodiment can pre-dust the dust-laden gas, thereby greatly reducing the content of large dust particles in the dust-laden gas, so as to reduce the processing pressure of the subsequent dust removal system. And because the dust collecting hood of this embodiment only performs simple physical treatment, its structure is simple. Compared with the cost of modifying the dust removal system, the cost of setting up the pre-dust removal chamber is very low, which can greatly reduce the cost required for environmental protection modification. Furthermore, because the dust collecting hood of this embodiment is used to reduce the content of large dust particles in the dust-laden gas, it can reduce the probability of material accumulation and other problems caused by large dust particles in the subsequent dust removal system, so as to reduce production and operation costs.

[0073] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the utility model, and are not intended to limit the scope of protection of the utility model. Any equivalent implementation plans or changes that do not deviate from the technical spirit of the utility model, such as combination, division or repetition of features, should be included in the scope of protection of the utility model.

Claims

1. A dust collecting hood, characterized in that: include: A dust collecting hood, wherein the top surface of the dust collecting hood has a first air outlet, and the bottom has a first air inlet, and dust-containing gas enters the dust collecting hood from the first air inlet; A pre-dust removal chamber, the pre-dust removal chamber comprising: A pre-dust removal hood, wherein the bottom surface of the pre-dust removal hood forms an opening, and the pre-dust removal hood is mounted on the top surface of the dust collecting hood to enclose the top surface of the dust collecting hood to form a pre-dust removal cavity; and A spray device, the spray device is installed on the inner wall of the pre-dust removal cover to spray water mist into the pre-dust removal cavity; Wherein, the pre-dust removal cover has a second side wall, the second side wall is offset from the first air outlet in the horizontal direction, and the second side wall is provided with a second exhaust port connected to the dust removal system; The dust-containing gas enters the pre-dust removal chamber from the first gas outlet, is dust-removed by the spray device, and is output to the dust removal system from the second exhaust port.

2. The dust collecting hood according to claim 1, characterized in that: The pre-dust removal cover has: a first side wall, wherein the first air outlet is located between the first side wall and the second side wall; and A top wall extending in a horizontal direction and connected between the first side wall and the second side wall; The first side wall forms an acute angle with the horizontal direction and is inclined toward the second side wall so as to guide the dust-laden gas to the second side wall.

3. The dust collecting hood according to claim 2, characterized in that: The spray device is installed on the inner surface of the top wall.

4. The dust collecting hood according to claim 2, characterized in that: The first air outlet has a second edge adjacent to the second side wall and a first edge away from the second side wall. The first side wall is connected to the first edge.

5. The dust collecting hood according to claim 4, characterized in that: The pre-dust removal chamber comprises: A water baffle is installed on the second edge, and the first air outlet is defined between the first side wall and the water baffle.

6. The dust collecting hood according to claim 5, characterized in that: In the horizontal direction, the spray device is located between the water baffle and the second side wall to avoid the first air outlet.

7. The dust collecting hood according to claim 5, characterized in that: The pre-dust removal chamber comprises: A flushing device, the flushing device is installed on a side of the water baffle plate facing the second side wall, and provides a flushing water source for the top surface of the dust collecting hood in a direction toward the second side wall; The second side wall is provided with a drain port connected to a water treatment system, and the drain port is not higher than the top surface of the dust collecting hood body.

8. The dust collecting hood according to claim 7, characterized in that: The top surface of the dust collecting hood forms an acute angle with the horizontal direction and is inclined downward toward the second side wall.

9. The dust collecting hood according to claim 2, characterized in that: The pre-dust removal cover comprises: An inspection port is provided on a surface of the pre-dust removal cover body different from the second side wall.

Images