Compound dust control dust collecting cover of crushing system

Abstract

The utility model discloses a compound dust control dust collecting cover of a crushing system, which belongs to the technical field of dust collecting covers and comprises a steel structure framework, an integral dust collecting cover is sleeved on the outer side of the steel structure framework, and a crusher is arranged on the steel structure framework. From the structural design and the material of the dust collection cover, the double-layer control dust collection cover is additionally arranged, dust generated above the crusher is controlled in the dust collection cover of the feeding conveyor, high negative pressure design is adopted, most of the dust is collected by the dust collection cover of the feeding conveyor, and the whole dust collection cover is arranged on the outer side of the steel structure framework. Dust escaping from the crusher is blocked in an inner cavity of the integral dust collection cover by the aid of the integral dust collection cover, the dust escaping from the inner cavity of the integral dust collection cover is collected by the aid of the micro-negative-pressure gas collection cover and the third air volume adjusting valve, powder source pollution is controlled by the aid of the principle of combination of powerful negative pressure and micro-negative pressure, and the dust collection cover is high in practicality.

Description

Technical Field

[0001] This utility model relates to the field of dust collection hood technology, and more specifically, to a compound dust control dust collection hood for crushing systems. Background Technology

[0002] Dust pollution is severe in crushing plants. If wet dust control technology is used, the humidified material cannot meet the process requirements for raw materials, and the humidified material tends to adhere to the internal structure of the crusher during crushing, causing it to malfunction. This is a particularly difficult problem to solve in dust control technology. Therefore, dry dust collection technology is more ideal. However, the design of dust collection hoods typically uses only partial steel structures, resulting in a small dust control area and significant dust overflow, severely polluting the surrounding working environment. Even with the designed airflow, some dust will still be generated from the transfer process and equipment connections. Furthermore, the designed airflow is large, leading to significant energy loss. Additionally, some material may be extracted by the dust collection system due to the small space and high airflow velocity of the partial dust collection hood, significantly increasing the dust handling capacity of the dust collection equipment and the burden on the dust collector system. Therefore, we propose a combined dust control hood for the crushing system. Utility Model Content

[0003] In view of the problems mentioned in the background art, the purpose of this utility model is to provide a compound dust control dust collection hood for crushing systems.

[0004] To solve the above problems, the present invention adopts the following technical solution:

[0005] A compound dust control hood for a crushing system includes a steel frame. An integral dust collection hood is fitted over the outer side of the steel frame. A crusher is mounted on the steel frame. A feed conveyor chute is fixedly connected to the feed inlet of the crusher. A feed belt conveyor is mounted on the side of the integral dust collection hood. The end of the feed belt conveyor extends into the inner cavity of the feed conveyor chute. A feed conveyor dust collection hood is mounted above the feed conveyor chute. The top of the feed conveyor dust collection hood extends to the top of the integral dust collection hood and is equipped with a first air vent. A flow regulating valve is provided. A discharge belt conveyor is installed below the steel structure frame. A partial dust collection hood for the discharge belt is installed above the discharge belt conveyor. A second flow regulating valve is installed on the side of the top of the partial dust collection hood for the discharge belt. The top of the partial dust collection hood for the discharge belt extends to the outside of the overall dust collection hood. A micro-negative pressure exhaust port is provided on the side of the overall dust collection hood and located on the side of the micro-negative pressure exhaust port. A micro-negative pressure air collection hood is fixedly installed on the side of the overall dust collection hood and located on the side of the micro-negative pressure exhaust port. A third flow regulating valve is provided at the end of the micro-negative pressure air collection hood.

[0006] As a preferred embodiment of this utility model, an inspection door is hinged to one side of the integral dust collection hood and located on the side of the steel structure frame.

[0007] As a preferred embodiment of this utility model, a second inspection door is hinged to the other side of the integral dust collection hood. The second inspection door is located above the steel structure frame inside the integral dust collection hood, and a ladder is provided on the other side of the integral dust collection hood and below the second inspection door.

[0008] As a preferred embodiment of this utility model, the side of the integral dust collection hood is provided with a discharge port, and the end of the discharge belt conveyor extends through the discharge port to the outside of the integral dust collection hood.

[0009] As a preferred embodiment of this utility model, the side of the integral dust collection hood is provided with a reserved belt conveyor inlet, and the feeding belt conveyor passes through the inner cavity of the reserved belt conveyor inlet.

[0010] As a preferred embodiment of this utility model, the steel structure frame is made of channel steel, and the integral dust collection hood is made of plexiglass sheet.

[0011] The advantages of this utility model are:

[0012] (1) In this utility model, starting from the structural design and material of the dust collection hood, a double-layer control dust collection hood is added. The dust generated above the crusher is controlled in the dust collection hood of the feeding conveyor. A high negative pressure design is adopted, and most of the dust is collected by the dust collection hood of the feeding conveyor. An integrated dust collection hood is set on the outside of the steel structure frame, so that the dust escaping from the crusher is blocked in the inner cavity of the integrated dust collection hood. At the same time, a micro negative pressure air collection hood and a third air volume regulating valve are used to collect the dust escaping from the inner cavity of the integrated dust collection hood. The principle of combining strong negative pressure and micro negative pressure is used to control the dust source pollution. The internal cavity of the integrated dust collection hood is designed as a slightly negative pressure environment. Fresh air from outside enters the integrated dust collection hood through the inlet and outlet belts, supplementing the hood. This serves two purposes: firstly, it increases the airflow inside the hood, preventing excessive negative pressure and deformation; secondly, it blocks dust from escaping through the openings between the hood and the outside. The airflow, supplied from the outside to the inside, effectively prevents dust from overflowing through the belt conveyor inlet and outlet, thus preventing uncollected dust from spilling into the indoor working environment. This design demonstrates good practicality.

[0013] (2) In this utility model, the dust collection hood of the feeding conveyor is made of steel structure material, which has high strength and stable structure, and avoids damage during production and operation. It uses organic glass as the material of the whole dust collection hood, and is combined with a steel structure frame made of channel steel. The space is well sealed, reducing the project cost and the structural design is stable. An inspection door is designed on each of the upper and lower layers of the steel structure frame to facilitate space cleaning. Attached Figure Description

[0014] Figure 1 This is a schematic cross-sectional view of the present invention;

[0015] Figure 2 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 3 This is a top view of the entire utility model.

[0017] The following are the labels in the diagram: 1. Discharge belt conveyor; 2. Partial dust collection hood for discharge belt conveyor; 3. Second air volume regulating valve; 4. Overall dust collection hood; 5. First air volume regulating valve; 6. Feed belt conveyor; 7. Dust collection hood for feed conveyor; 8. Crusher; 9. Micro-negative pressure exhaust port; 10. Micro-negative pressure air collection hood; 11. Third air volume regulating valve; 12. First floor inspection door; 13. Second floor inspection door; 14. Ladder; 15. Steel structure frame; 16. Reserved belt conveyor inlet; 17. Discharge port; 18. Feed conveyor chute. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0019] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," 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 do not 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. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] Example 1:

[0022] Please see Figure 1-3 The crushing system includes a compound dust control hood, comprising a steel frame 15, an integral dust collection hood 4 fitted on the outer side of the steel frame 15, a crusher 8 mounted on the steel frame 15, a feed conveyor chute 18 fixedly connected to the feed inlet of the crusher 8, a feed belt conveyor 6 mounted on the side of the integral dust collection hood 4, the end of the feed belt conveyor 6 extending into the inner cavity of the feed conveyor chute 18, a feed conveyor dust collection hood 7 mounted above the feed conveyor chute 18, and the top of the feed conveyor dust collection hood 7 extending to the top of the integral dust collection hood 4 and equipped with a first... Below the steel structure frame 15, there is a discharge belt conveyor 1. Above the discharge belt conveyor 1, there is a discharge belt partial dust collection hood 2. A second air volume regulating valve 3 is installed on the side of the top of the discharge belt partial dust collection hood 2. The top of the discharge belt partial dust collection hood 2 extends to the outside of the overall dust collection hood 4. A micro negative pressure exhaust port 9 is installed on the side of the overall dust collection hood 4 and on the side of the micro negative pressure exhaust port 9. A micro negative pressure air collection hood 10 is fixedly installed on the side of the overall dust collection hood 4 and on the side of the micro negative pressure exhaust port 9. A third air volume regulating valve 11 is installed at the end of the micro negative pressure air collection hood 10.

[0023] In this embodiment, the structure design of the dust collection hood 7 of the feeding conveyor is as follows: the exhaust volume of the dust collection hood 7 of the feeding conveyor is determined by the bandwidth and speed of the feeding belt conveyor 6 and the drop height of the material through the feeding conveyor chute 18. The exhaust volume divided by the control wind speed at the opening of the dust collection hood 7 of the feeding conveyor equals the design area of ​​the opening of the dust collection hood. The dust collection hood 7 of the feeding conveyor is made of Q235-A steel plate with a thickness of not less than 3mm. The edge of the hood is designed with a flange so that the equipment vibration will not damage the dust collection hood 7 of the feeding conveyor. It is easy to disassemble, install, maintain the equipment and serve as a support frame.

[0024] The overall dust collection hood 4 structure design: After sealing the dust generation source, a certain amount of air must be drawn from the sealed hood to maintain a certain negative pressure inside the hood to prevent pollutants from escaping outside the hood and polluting the workshop environment. In order to ensure that a certain negative pressure is generated inside the hood, the total balance of air intake and exhaust volume inside the sealed hood must be met. Its exhaust volume Q is equal to the sum of the amount of air Q1 drawn into the hood from the gap and the amount of pollutant source gas Q2. Among them, Q2 includes the amount of material induction gas entering the hood, the volume of material, the amount of process gas blown into the hood, etc., that is, Q=Q1+Q2, and the calculation method is as follows;

[0025] The formula for calculating exhaust volume based on the generated pollutant gases and the gap area is as follows:

[0026] Q = Q1 + Q2 = 3600KvZA + Q2

[0027] In the formula:

[0028] K is the safety factor, which is generally taken as 1.05 to 1.1;

[0029] v is the velocity through the gap or opening, in m / s, typically ranging from 1 m / s to 4 m / s;

[0030] ZA represents the total area of ​​the openings and gaps in the sealed enclosure, in m². 2 The reserved inlet for the belt conveyor is 1.5m × 2m = 3m. 2 After the conveyor belt is fixed, the empty space is covered with canvas;

[0031] Q2 and Q1 are the pollution source gas volume and total exhaust volume, respectively, in m³ / h;

[0032] The tail ends of the dust collection hood 7 and the micro negative pressure air collection hood 10 of the feeding conveyor are both connected to external dust collection equipment in order to collect dust.

[0033] This crushing system is used to process oil shale to produce semi-finished soil-enhancing particles. Crusher 8 is a compound crusher. The feed particle size of the raw material is 0mm to 100mm, and the output particle size is 0mm to 3mm. Among them, the particles smaller than 1mm after crushing are not less than 80%, and the particles between 1mm and 3mm are not more than 20%.

[0034] For details, please refer to Figure 3 An inspection door 12 is hinged to one side of the overall dust collection hood 4 and to the side of the steel structure frame 15.

[0035] In this embodiment, the lower part of the steel structure frame 15 is accessed by opening the first-level inspection door 12 in order to inspect the equipment at the lower part of the steel structure frame 15.

[0036] For details, please refer to Figure 3 On the other side of the overall dust collection hood 4, a second-level inspection door 13 is hinged. The second-level inspection door 13 is located above the steel structure frame 15 inside the overall dust collection hood 4. A ladder 14 is provided on the other side of the overall dust collection hood 4 and below the second-level inspection door 13.

[0037] In this embodiment, by opening the second-floor inspection door 13 to access the upper part of the steel structure frame 15, and by using the ladder 14, it is convenient for workers to climb onto the steel structure frame 15.

[0038] For details, please refer to Figure 2 The side of the overall dust collection hood 4 is provided with a discharge port 17, and the end of the discharge belt conveyor 1 extends through the discharge port 17 to the outside of the overall dust collection hood 4.

[0039] In this embodiment, the discharge port 17 facilitates the conveyor belt 1 to transport the crushed material out.

[0040] For details, please refer to Figure 1The side of the overall dust collection hood 4 is provided with a reserved belt conveyor inlet 16, and the feeding belt conveyor 6 passes through the inner cavity of the reserved belt conveyor inlet 16.

[0041] In this embodiment, the feed belt conveyor 6 is ensured to extend into the feed conveyor chute 18 in order to feed the crusher 8.

[0042] For details, please refer to Figure 1 The steel frame 15 is made of channel steel, and the overall dust collection hood 4 is made of plexiglass.

[0043] In this embodiment, the integral dust collection hood 4 is made of plexiglass, which facilitates monitoring the operation of the equipment through the hood. It has low engineering cost and good visibility. At the same time, the integral dust collection hood 4 and the steel frame 15 are detachable, which makes it easy to move and inspect the equipment during maintenance and disassembly.

[0044] Working Principle: During operation, the feed belt conveyor 6 transports oil shale from 0mm to 100mm into the feed conveyor chute 18. The raw material enters the crusher 8 from the feed conveyor chute 18. During the crushing process, the large pieces of material are crushed into particles with a particle size of not less than 1mm through impact or biting of the equipment. The dust generated by the material is caused by various factors, including the induced airflow generated by the potential energy sliding, the air shock wave airflow, and the traction airflow generated by the high-speed operation of the receiving belt. A large amount of dust airflow is generated at the feed and discharge ports of the crusher 8, resulting in serious dust source pollution. Therefore, before the equipment is put into operation, the dust collection hood 7 of the feed conveyor and the first air volume regulating valve 5 are opened, and the local dust collection hood 2 of the discharge belt and the second air volume regulating valve 3 are opened at the same time. The valve opening is adjusted according to the dust collection situation, and the wind speed at the hood opening and the resistance loss of the air inlet pipeline are adjusted. With its small volume and adjustable airflow speed, the device can control negative pressure in localized areas, making it suitable for locations with concentrated and continuous dust pollution. Additionally, the device operates with a 5-second delay before activating the feed conveyor 6, crusher 8, and discharge conveyor 1. The variable frequency fan adjusts the airflow to regulate the pollution control status of the feed conveyor dust collection hood 7. The high-speed negative pressure generated by the feed conveyor dust collection hood 7 collects most of the settled dust, which is then sent to the dust removal equipment for centralized treatment. Some uncontrolled dust particles are blocked by the overall dust collection hood 4. The large internal volume of the overall dust collection hood 4 buffers the dust-laden airflow and reduces localized positive pressure. A micro-negative pressure air collection hood 10 is designed on the overall dust collection hood 4 to collect dust-laden air below PM10. The micro-negative pressure air collection hood 10 collects the dust and sends it to the dust removal equipment. The third airflow regulating valve 11 adjusts the ventilation volume within the overall dust collection hood 4.

[0045] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model based on the technical solution and its improved concept should be covered within the protection scope of the present utility model.

Claims

1. A compound dust control hood for a crushing system, characterized in that: The system includes a steel frame (15), an integral dust collection hood (4) fitted on the outside of the steel frame (15), a crusher (8) mounted on the steel frame (15), a feed conveyor chute (18) fixedly connected to the feed inlet of the crusher (8), a feed belt conveyor (6) mounted on the side of the integral dust collection hood (4), the end of the feed belt conveyor (6) extending into the inner cavity of the feed conveyor chute (18), a feed conveyor dust collection hood (7) mounted above the feed conveyor chute (18), and the top of the feed conveyor dust collection hood (7) extending to the top of the integral dust collection hood (4) and equipped with a first airflow regulating valve (5). Below the steel structure frame (15) is a discharge belt conveyor (1), above the discharge belt conveyor (1) is a discharge belt partial dust collection hood (2), a second air volume regulating valve (3) is provided on the side of the top of the discharge belt partial dust collection hood (2), the top of the discharge belt partial dust collection hood (2) extends to the outside of the overall dust collection hood (4), a micro negative pressure exhaust port (9) is provided on the side of the overall dust collection hood (4), a micro negative pressure air collection hood (10) is fixedly installed on the side of the overall dust collection hood (4) and on the side of the micro negative pressure exhaust port (9), and a third air volume regulating valve (11) is provided at the end of the micro negative pressure air collection hood (10).

2. The compound dust control hood for the crushing system according to claim 1, characterized in that: An inspection door (12) is hinged to one side of the overall dust collection hood (4) and to the side of the steel structure frame (15).

3. The compound dust control hood for the crushing system according to claim 1, characterized in that: The other side of the overall dust collection hood (4) is hinged with a double-layer inspection door (13), which is located above the steel structure frame (15) inside the overall dust collection hood (4). A ladder (14) is provided on the other side of the overall dust collection hood (4) and below the double-layer inspection door (13).

4. The compound dust control hood for the crushing system according to claim 1, characterized in that: The side of the integral dust collection hood (4) is provided with a discharge port (17), and the end of the discharge belt conveyor (1) extends through the discharge port (17) to the outside of the integral dust collection hood (4).

5. The compound dust control hood for the crushing system according to claim 1, characterized in that: The side of the overall dust collection hood (4) is provided with a reserved belt conveyor inlet (16), and the feeding belt conveyor (6) passes through the inner cavity of the reserved belt conveyor inlet (16).

6. The compound dust control hood for the crushing system according to claim 1, characterized in that: The steel frame (15) is made of channel steel, and the integral dust collection hood (4) is made of plexiglass.

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