A dust removal device for molybdenum iron smelting processing

Abstract

This utility model discloses a dust removal device for ferromolybdenum smelting and processing, relating to the field of ferromolybdenum smelting and processing. It addresses the problems in existing technologies, such as uneven gas distribution within the housing, higher filtration pressure on filter bags near the air inlet compared to those further away, higher frequency of periodic dust removal, and increased energy consumption. A first air inlet distribution box is fixed to the lower end of one side of the housing. An air inlet pipe is connected to the outside of the first air inlet distribution box. A central triangular air distribution element is fixed inside the first air inlet distribution box along the output end of the air inlet pipe, dividing the interior of the first air inlet distribution box into two symmetrical flow channels. Conveying pipes are installed at both the front and rear ends of the first air inlet distribution box. An air inlet hood is installed at the other end of each conveying pipe. Two internal flow guide plates are fixed inside the air inlet hood along the output end of the conveying pipe, forming multiple flow channels within the air inlet hood through the separation of the internal flow guide plates.

Description

Technical Field

[0001] This utility model relates to the field of ferromolybdenum smelting and processing, specifically to a dust removal device for ferromolybdenum smelting and processing. Background Technology

[0002] Ferromolybdenum alloys, as important alloying additives, are widely used in iron and steel smelting, casting, and non-ferrous metal processing. In the ferromolybdenum smelting process, raw materials (such as molybdenum concentrate and molybdenum oxide) need to undergo a high-temperature reduction reaction to produce ferromolybdenum alloys. This process is usually carried out in an electric furnace or reverberatory furnace. However, under the high-temperature smelting environment, impurities in the raw materials (such as sulfur, phosphorus, and arsenic) and volatile substances (such as molybdenum oxide and metal dust) escape with the flue gas, forming dust-laden waste gas.

[0003] To address pollution issues, the ferromolybdenum smelting industry has long employed dust removal devices to purify waste gas. Traditional dust removal technologies are mainly divided into two categories: dry dust removal and wet dust removal. Dry dust removal is represented by bag filters, cyclone dust collectors, and electrostatic precipitators. Bag filters intercept particulate matter through filter media and are suitable for handling high-temperature, high-concentration dust. For example, the Chinese authorized patent (bag filter) with publication number CN 108465306 A includes a dust collection chamber, a purification chamber, a dust hopper, and support legs. A first partition is installed between the dust collection chamber and the cleanroom, and a second partition is installed between the dust collection chamber and the ash hopper. The first partition has several first through holes, and the second partition has several second through holes. A straight pipe is fixed between each first through hole and its corresponding second through hole. Each straight pipe has several rows of ventilation holes on its wall. Each straight pipe contains a frame, and each frame is fitted with a filter bag. An air inlet is located on the side wall of the dust collection chamber, an air outlet is located on the top of the cleanroom, and an ash discharge valve is located at the bottom of the ash hopper. The baghouse dust collector provided by this invention ensures that the dust-laden airflow entering the dust collection chamber does not affect the ash hopper, thus avoiding "secondary dust generation" of the dust already deposited in the ash hopper.

[0004] Although the aforementioned existing technology has the function of dust removal, the air inlet is located on one side, and the uneven distribution of gas entering the housing causes a large difference in the workload of different filter bags. The filter bags closer to the air inlet have a higher filtration pressure than those farther away from the air inlet. In order to ensure dust removal efficiency, the frequency of regular dust cleaning needs to be increased, which increases the energy consumption of the equipment. Utility Model Content

[0005] The purpose of this utility model is to provide a dust removal device for ferromolybdenum smelting and processing, so as to solve the problems mentioned in the background art, such as uneven gas distribution inside the shell, higher filtration pressure of filter bags near the air inlet compared to those far from the air inlet, high frequency of regular dust removal, and increased energy consumption.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a dust removal device for ferromolybdenum smelting and processing, comprising a housing, a first air inlet distribution box fixed at the lower end of one side of the housing, an air inlet pipe connected to the outside of the first air inlet distribution box, a central triangular air distribution component fixed inside the first air inlet distribution box along the output end of the air inlet pipe, the central triangular air distribution component dividing the interior of the first air inlet distribution box into two symmetrical flow channels, a conveying pipe installed at both the front and rear ends of the first air inlet distribution box, the conveying pipe communicating with the flow channels, an air inlet hood installed at the other end of the conveying pipe, two air inlet hoods respectively installed at the lower ends of the front and rear ends of the housing, two internal flow guiding distribution plates fixed inside the air inlet hood along the output end of the conveying pipe, the two internal flow guiding distribution plates being symmetrically arranged, and multiple flow channels forming inside the air inlet hood through the separation of the internal flow guiding distribution plates, the flow channels communicating with the interior of the housing.

[0007] Preferably, a fixing plate is fixed between the air inlet pipe and the first air inlet distribution box, and a plurality of first flow equalization holes are opened on the fixing plate, and a plurality of second flow equalization holes are opened on the front and rear end faces of the housing along the inner end of the air inlet cover.

[0008] Preferably, an air outlet is provided at the upper end of the housing on the side away from the first air inlet distribution box, and an upper support plate is fixed inside the housing along the lower end of the air outlet. Multiple bag cages are arranged in an array on the upper support plate, and filter bags are provided inside the bag cages. A filter chamber is formed inside the housing along the external space of the bag cages and filter bags.

[0009] Preferably, an air tank is installed at the upper end of the rear end of the housing via a bracket, and multiple pipes are installed at equal intervals at the front end of the air tank. Electromagnetic pulse valves are installed on the pipes, and the other end of the pipes extends into the housing. Multiple cleaning pipes are installed at equal intervals from front to back at the lower end of the pipes. The cleaning pipes are arranged vertically and vertically corresponding to the bag cage and filter bag, and the other end of the cleaning pipes extends into the filter bag.

[0010] Preferably, an air outlet hopper is fixed to the outside of the air outlet on the outer side of the housing, the output end of the air outlet hopper is connected to an air supply pipe, the output end of the air supply pipe is connected to the input end of the fan, and the output end of the fan is connected to the air outlet hopper.

[0011] Preferably, multiple ash hoppers are equidistantly connected to the lower end of the shell, the ash hoppers are welded and fixed to the shell, and the ash hoppers are in communication with the inside of the filter chamber.

[0012] Preferably, a lower support frame is welded and fixed to the lower end of the shell along the outside of the ash hopper.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] (1) In this utility model, through the synergistic effect of the central triangular air distribution component and the inner guide distribution plate, the dust-laden exhaust gas can be relatively evenly distributed after entering the filter chamber, presenting a uniform air intake situation from the outside to the inside, eliminating the problem of uneven airflow, making the filtration pressure of multiple filter bags relatively balanced, greatly improving the filtration efficiency of the filter bags, effectively removing fine dust in the dust-laden exhaust gas, improving the working environment, and reducing pollution to the atmospheric environment. It also reduces the frequency of regular dust cleaning and lowers energy consumption.

[0015] (2) In this utility model, the synergistic effect of the first and second flow equalization holes on the fixed plate can eliminate the problem of eddy current before the dust-laden exhaust gas enters the filter chamber, thereby reducing the impact of the dust-laden exhaust gas on the filter bag, reducing the force of the dust-laden exhaust gas on the dust adsorbed on the outside of the filter bag, reducing dust, reducing the adsorption burden of the filter bag, and reducing the maintenance workload. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of a dust removal device for ferromolybdenum smelting and processing according to the present invention, taken from a frontal perspective.

[0017] Figure 2 This is a schematic diagram of the overall structure of a dust removal device for ferromolybdenum smelting and processing according to the present invention, viewed from a rearward angle.

[0018] Figure 3 This is a front view of a dust removal device for ferromolybdenum smelting and processing according to the present invention;

[0019] Figure 4 This is a cross-sectional view at point AA of a dust removal device for ferromolybdenum smelting and processing according to this utility model;

[0020] Figure 5 This is a top view of a dust removal device for ferromolybdenum smelting and processing according to the present invention;

[0021] Figure 6 This is a cross-sectional view at point BB of a dust removal device for ferromolybdenum smelting and processing according to this utility model.

[0022] In the diagram: 1. Shell; 2. Ash hopper; 3. Lower support frame; 4. Upper support plate; 5. Bag cage; 6. Filter bag; 7. Filter chamber; 8. Air manifold; 9. Electromagnetic pulse valve; 10. Ash cleaning pipe; 11. Air outlet hopper; 12. Air conveying pipe; 13. Fan; 14. Air outlet pipe; 15. First air inlet distribution box; 16. Air inlet pipe; 17. Fixed plate; 18. First flow equalization hole; 19. Middle triangular air equalization component; 20. Flow channel; 21. Conveying pipe; 22. Air inlet hood; 23. Inner flow guide plate; 24. Flow channel; 25. Second flow equalization hole. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] Please see Figures 1-6 In one embodiment of this utility model, a dust removal device for ferromolybdenum smelting and processing is provided, in which the shell 1 serves as the core frame of the entire dust removal device and is welded from high-strength steel plates. Its internal space is spacious, providing ample space for the installation of other components.

[0025] A first air inlet distribution box 15 is fixed to the lower end of one side of the housing 1. An air outlet is provided at the upper end of the housing 1 on the side away from the first air inlet distribution box 15, and an upper support plate 4 is fixed inside the housing 1 along the lower end of the air outlet. Multiple bag cages 5 are arrayed on the upper support plate 4. The bag cages 5 are welded from steel wire and steel rings. Filter bags 6 are installed inside the bag cages 5. The filter bags 6 are made of high-performance filter material. A filter chamber 7 is formed inside the housing 1 along the external space of the bag cages 5 and filter bags 6. After the dust-laden exhaust gas enters the filter chamber 7, the dust is adsorbed on the outer surface of the filter bags 6, and the purified exhaust gas flows upward. Multiple filter bags 6 work simultaneously, with a large filtration area and high filtration efficiency, which can quickly and effectively remove dust from the dust-laden exhaust gas.

[0026] Multiple dust hoppers 2 are equidistantly connected to the lower end of the shell 1. The dust hoppers 2 are welded and fixed to the shell 1, ensuring the airtightness of the connection. The dust hoppers 2 can effectively collect and store dust. The dust hoppers 2 are connected to the interior of the filter chamber 7, and some dust will directly enter the dust hoppers 2 due to gravity. The dust inside the dust hoppers 2 can be cleaned by periodically opening the ash discharge valve at the lower end of the dust hoppers 2. A lower support frame 3 is welded and fixed to the lower end of the shell 1 along the outside of the dust hoppers 2. The lower support frame 3 is made of high-strength steel and can withstand the entire weight of the device as well as the vibration and impact forces generated during operation.

[0027] An air inlet pipe 16 is connected to the outside of the first air inlet distribution box 15 to ensure that the dust-laden exhaust gas can smoothly enter the first air inlet distribution box 15. A fixed plate 17 is fixed between the air inlet pipe 16 and the first air inlet distribution box 15, and a plurality of first flow equalization holes 18 are evenly opened on the fixed plate 17. When the dust-laden exhaust gas enters the first air inlet distribution box 15 through the air inlet pipe 16, it first passes through the first flow equalization holes 18 on the fixed plate 17. The first flow equalization holes 18 can effectively disperse the eddies in the dust-laden exhaust gas, making the airflow more stable and uniform. This design allows the dust-laden exhaust gas to have a better flow state when entering the subsequent treatment stage, laying the foundation for improving the overall dust removal efficiency and reducing the problem of uneven filtration caused by airflow turbulence. Inside the first air inlet distribution box 15, along the output end of the air inlet pipe 16, is a central triangular air distribution element 19. This element divides the interior of the first air inlet distribution box 15 into two symmetrical flow channels 20. Conveying pipes 21 are installed at both the front and rear ends of the first air inlet distribution box 15, and these pipes are connected to the flow channels 20. After initial rectification by the first flow equalization hole 18, the dust-laden exhaust gas enters the flow channel 20. The central triangular air distribution element 19 further separates the dust-laden exhaust gas, dividing it into two parts that are conveyed to the front and rear ends respectively through the conveying pipes 21. This design allows for a more uniform distribution of the dust-laden exhaust gas within the first air inlet distribution box 15.

[0028] An air inlet hood 22 is installed at the other end of the conveying pipe 21. Two air inlet hoods 22 are respectively installed at the lower ends of the front and rear ends of the housing 1. Inside the air inlet hood 22, two internal flow distribution plates 23 are fixed along the output end of the conveying pipe 21. The two internal flow distribution plates 23 are symmetrically arranged and have smooth surfaces to reduce airflow resistance. Multiple flow channels 24 are formed inside the air inlet hood 22 through the separation of the internal flow distribution plates 23. The flow channels 24 are connected to the inside of the housing 1. After the dust-laden exhaust gas enters the air inlet hood 22, it is distributed and guided by the internal flow distribution plates 23 and flows inward through the flow channels 24. This design allows the dust-laden exhaust gas to flow more orderly when entering the housing 1, further optimizing the airflow distribution and providing a strong guarantee for subsequent uniform filtration, effectively improving the utilization rate and filtration efficiency of the filter bag 6. Several second flow equalization holes 25 are opened on the front and rear end faces of the housing 1 along the inner end of the air inlet hood 22. The second flow equalization holes 25 are evenly distributed and can further eliminate residual eddies in the dust-laden exhaust gas. When the dust-laden exhaust gas reaches the position of the second flow equalization hole 25 through the flow channel 24, the second flow equalization hole 25 rectifies the airflow again, so that the dust-laden exhaust gas enters the filter chamber 7 of the housing 1 more evenly, which improves the uniformity of the distribution of dust-laden exhaust gas in the filter chamber 7, avoids the problem of excessive local filtration burden, and enables the dust removal device to process more dust-laden exhaust gas in a shorter time.

[0029] An air tank 8 is mounted on the upper rear end of the housing 1 via a bracket. The air tank 8 has good sealing and pressure resistance. Multiple pipes are equidistantly installed at the front end of the air tank 8, and electromagnetic pulse valves 9 are installed on the pipes. The other end of the pipes extends into the housing 1, and multiple cleaning pipes 10 are equidistantly installed from front to back at the lower end of the pipes. The cleaning pipes 10 are arranged vertically corresponding to the bag cage 5 and the filter bag 6, and the other end of the cleaning pipes 10 extends into the filter bag 6. During periodic cleaning, based on the synergistic effect of electromagnetic induction and air pressure control, an electrical signal triggers the opening of the electromagnetic pulse valves 9. Compressed air inside the air tank 8 is pulsed through the cleaning pipes 10, generating a strong impact force, thereby cleaning the dust on the surface of the filter bag 6. The dust enters the ash hopper 2.

[0030] An exhaust duct 11 is fixed to the outer side of the housing 1 along the outside of the exhaust port, allowing the purified exhaust gas to flow out smoothly and steadily. An air duct 12 is connected to the output end of the exhaust duct 11. The output end of the air duct 12 is connected to the input end of the fan 13, which provides powerful force for the exhaust gas discharge. An exhaust pipe 14 is connected to the output end of the fan 13. The purified exhaust gas, after passing through the filter bag 6, flows out through the exhaust duct 11, the air duct 12, the fan coil unit of the fan 13, and the exhaust pipe 14.

[0031] The dust removal device also includes the air inlet pipe, inspection port or inspection door, and stair treads of the air tank 8, which are consistent with the functions and structures of the existing structure and are not specifically shown.

[0032] Working principle: After the dust-laden exhaust gas is initially removed by the cyclone dust collector to remove large particles, it enters the first air distribution box 15 through the air inlet pipe 16. When the dust-laden exhaust gas passes through the first flow equalization hole 18 on the fixed plate 17, the eddy current is eliminated. The dust-laden exhaust gas is separated by the middle triangular air equalization component 19 and divided into two parts, which are conveyed to the front and rear ends respectively through the conveying pipe 21.

[0033] The dust-laden exhaust gas then enters the air inlet hood 22, where it is distributed and guided by the inner flow distribution plate 23. It flows inward through the flow channel 24, and upon reaching the second flow equalization hole 25, the second flow equalization hole 25 eliminates residual eddies. The dust-laden exhaust gas then enters the filter chamber 7 of the housing 1.

[0034] Dust is adsorbed onto the outer surface of filter bag 6. The purified exhaust gas flows upward through filter bag 6 and exits through exhaust hopper 11, air conveyor duct 12, fan coil unit of fan 13, and exhaust duct 14. Some dust will directly enter ash hopper 2 due to gravity. During periodic dust removal via electromagnetic pulse valve 9, pulse jet cleaning is performed through cleaning pipe 10 to remove dust from the surface of filter bag 6, and the dust enters ash hopper 2. The ash discharge valve at the bottom of ash hopper 2 is opened to periodically clean the dust inside ash hopper 2.

[0035] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A dust removal device for ferromolybdenum smelting and processing, comprising a housing (1), characterized in that: A first air inlet distribution box (15) is fixed to the lower end of one side of the housing (1). An air inlet pipe (16) is connected to the outside of the first air inlet distribution box (15). A middle triangular air distribution component (19) is fixed inside the first air inlet distribution box (15) along the output end of the air inlet pipe (16). The middle triangular air distribution component (19) divides the inside of the first air inlet distribution box (15) into two symmetrical flow channels (20). A conveying pipe (21) is installed at both the front and rear ends of the first air inlet distribution box (15). The conveying pipe (21) and the flow channel are connected. The groove (20) is connected, and an air inlet hood (22) is installed at the other end of the conveying pipe (21). The two air inlet hoods (22) are respectively installed at the lower ends of the front and rear ends of the housing (1). Two internal flow distribution plates (23) are fixed inside the air inlet hood (22) along the output end of the conveying pipe (21). The two internal flow distribution plates (23) are symmetrically arranged. Multiple flow channels (24) are formed inside the air inlet hood (22) through the separation of the internal flow distribution plates (23). The flow channels (24) are connected to the inside of the housing (1).

2. The dust removal device for ferromolybdenum smelting and processing according to claim 1, characterized in that: A fixing plate (17) is fixed between the air inlet pipe (16) and the first air inlet distribution box (15). The fixing plate (17) has several first flow equalization holes (18). The front and rear end faces of the housing (1) have several second flow equalization holes (25) along the inner end of the air inlet cover (22).

3. The dust removal device for ferromolybdenum smelting and processing according to claim 1, characterized in that: An air outlet is provided at the upper end of the housing (1) on the side away from the first air inlet distribution box (15). An upper support plate (4) is fixed inside the housing (1) along the lower end of the air outlet. Multiple bag cages (5) are arranged in an array on the upper support plate (4). A filter bag (6) is provided inside the bag cage (5). A filter chamber (7) is formed inside the housing (1) along the external space of the bag cage (5) and the filter bag (6).

4. The dust removal device for ferromolybdenum smelting and processing according to claim 3, characterized in that: An air tank (8) is installed at the upper end of the rear end of the housing (1) via a bracket. Multiple pipes are installed at equal intervals at the front end of the air tank (8). Electromagnetic pulse valves (9) are installed on the pipes. The other end of the pipes extends into the housing (1) and multiple cleaning pipes (10) are installed at equal intervals from front to back at the lower end of the pipes. The cleaning pipes (10) are arranged vertically and vertically with the bag cage (5) and the filter bag (6). The other end of the cleaning pipes (10) extends into the filter bag (6).

5. A dust removal device for ferromolybdenum smelting and processing according to claim 3, characterized in that: An air outlet hopper (11) is fixed on the outside of the housing (1) along the outside of the air outlet. The output end of the air outlet hopper (11) is connected to an air supply pipe (12). The output end of the air supply pipe (12) is connected to the input end of the fan (13). The output end of the fan (13) is connected to an air outlet pipe (14).

6. A dust removal device for ferromolybdenum smelting and processing according to claim 3, characterized in that: Multiple ash hoppers (2) are equidistantly connected to the lower end of the shell (1). The ash hoppers (2) are welded and fixed to the shell (1). The ash hoppers (2) are connected to the inside of the filter chamber (7).

7. A dust removal device for ferromolybdenum smelting and processing according to claim 6, characterized in that: The lower end of the shell (1) is welded and fixed with a lower support frame (3) along the outside of the ash hopper (2).

Images