Slag micro-powder dust removal device

Abstract

The utility model relates to the field of dust removal devices, in particular to a slag micro-powder dust removal device, and solves the problems of low dust removal efficiency, high energy consumption and difficulty in trapping superfine dust of a traditional cloth bag. The device comprises an airflow dispersion unit, a high-voltage electric field unit, an electrostatic dust collection unit, a rapping dust removal device and a dust collection box. According to the airflow dispersion unit, an airflow dispersion box is divided into two cavities through a flow equalizing plate, and airflow distribution is optimized. A first discharge electrode and a first dust collection electrode are arranged in the high-voltage electric field unit, and dust particles are electrified through corona discharge. In the electrostatic dust collection unit, a second discharge electrode and a second dust collection electrode are arranged at an interval, and charged dust is deposited on the dust collection electrode under the action of an electrostatic field. The rapping dust removal device drives a rapping hammer set through a vibrating motor, dust on a dust collection electrode is removed regularly, and efficient operation is ensured. Dust enters the collecting box through the dust falling channel, efficient dust removal is achieved, and energy consumption is reduced.

Description

Technical Field

[0001] This utility model relates to the field of dust removal device technology, and more specifically, to a dust removal device for slag powder. Background Technology

[0002] Slag powder is a powdered product obtained by ultra-fine grinding of water-quenched slag discharged from blast furnaces. It has wide applications in the building materials industry, playing a crucial role, especially in cement production and ready-mixed concrete preparation. Slag powder is used in various ways, primarily as an admixture, additive, and main admixture. Its main function is to improve the early strength of cement and concrete, and to enhance the workability of concrete, such as increasing workability, accelerating hardening speed, and reducing heat of hydration.

[0003] Specifically, when used as an admixture, slag powder can not only replace part of the cement and reduce production costs, but also effectively improve the durability and impermeability of concrete; when used as an admixture, it focuses on optimizing the fluidity and pumpability of concrete, which helps to improve construction efficiency.

[0004] However, the production process of slag powder is accompanied by the generation of a large amount of fine dust, especially dust with a particle size of less than 2.5 μm (PM2.5), which poses a serious threat to the environment and human health. Traditional dust removal technologies, such as the use of bag filters alone, often face problems such as low efficiency, high energy consumption, or difficulty in effectively capturing ultrafine dust. This not only affects the environmental performance of the production process but also increases the operating costs of enterprises. Utility Model Content

[0005] The purpose of this utility model is to provide a slag micro dust removal device to solve the technical problems of low efficiency, high energy consumption and difficulty in effectively capturing ultrafine dust in the current bag dust removal process.

[0006] This utility model provides a dust removal device for slag powder, including: an airflow dispersion unit, including an airflow dispersion box and a flow equalization plate disposed in the airflow dispersion box. The flow equalization plate is horizontally arranged and has multiple through holes, which divide the airflow dispersion box into a first chamber and a second chamber connected by the through holes. An air inlet pipe is connected to the top of the first chamber and an air outlet pipe is connected to the bottom of the second chamber.

[0007] The high-voltage electric field unit includes a high-voltage electric field box connected to the exhaust pipe, and is equipped with a first discharge electrode and a first dust collection electrode arranged at intervals inside, which are used to polarize and charge the dust particles through corona discharge.

[0008] The electrostatic dust removal unit includes a dust removal box connected to a high-voltage electric field box, and is equipped with a second discharge electrode and a second dust collection electrode arranged at intervals inside. Charged dust is deposited on the second dust collection electrode under the action of the electrostatic field.

[0009] The rapping dust removal device includes a vibrating motor disposed above the second dust collecting electrode, a transmission rod connected to the vibrating motor, and a rapping hammer assembly disposed at the bottom of the transmission rod, wherein the rapping hammer assembly is provided with a gap between it and the surface of the second dust collecting electrode.

[0010] The dust collection box is connected to the bottom of the second dust collection electrode through the dust collection channel.

[0011] According to one embodiment of the present invention, the vibratory hammer assembly includes multiple spaced titanium alloy hammerheads, each of which is covered with a 2-5mm thick rubber layer.

[0012] According to one embodiment of the present invention, the surface of the second dust collecting electrode is provided with a polytetrafluoroethylene anti-stick coating with a coating thickness of 0.1-0.3 mm.

[0013] According to one embodiment of the present invention, the working surface of the second dust collecting electrode is serrated, with a serration depth of 5-15mm and a serration spacing of 10-20mm.

[0014] According to one embodiment of the present invention, it also includes a filter screen disposed at the inlet of the air intake pipe, the filter screen having a mesh size of 80-120 mesh.

[0015] According to one embodiment of the present invention, it further includes a return air pipe connecting the top of the dust removal box to the air inlet pipe of the airflow dispersion unit, and the return air pipe is equipped with a valve.

[0016] According to one embodiment of the present invention, the second dust collecting electrode has a honeycomb structure with a honeycomb pore diameter of 3-8 mm and a pore depth of 50-200 mm, and the honeycomb pores are arranged in a hexagonal pattern.

[0017] According to one embodiment of the present invention, the flow equalization plate is a perforated plate with an opening ratio of 30-50%, and the plate body is inclined at 5-15° relative to the horizontal plane.

[0018] The technical solution of this utility model has at least the following advantages and beneficial effects:

[0019] In this invention, dust particles in the gas are polarized and charged by the high-voltage electric field unit when passing through it. This design allows even PM2.5 particles with a diameter of less than 2.5 μm to be effectively captured. Upon entering the electrostatic precipitator unit, the charged dust particles rapidly move to the second collecting electrode and settle under the influence of the electrostatic field. This combination of multi-stage corona discharge and electrostatic field technology significantly improves the overall dust removal efficiency. Dust adhering to the second collecting electrode is periodically removed by a rapping cleaning device and enters the dust collection box. In particular, the design using titanium alloy hammers with a rubber coating not only reduces damage to the collecting electrode but also improves cleaning efficiency and reduces equipment maintenance costs. Furthermore, the application of a polytetrafluoroethylene (PTFE) anti-stick coating makes it difficult for dust to adhere to the surface of the collecting electrode, further simplifying the cleaning process. The serrated working surface design increases the dust collection area, improving dust removal efficiency while also enhancing the stability and durability of the equipment. The honeycomb structure of the second dust collection electrode further optimizes space utilization and dust collection effect. It not only effectively reduces dust emissions during the production of slag powder and lowers the risk of environmental pollution, but also realizes the recycling of waste gas through the design of the exhaust gas recovery unit, reducing the impact on the external environment and embodying the concept of green environmental protection. The filter screen set at the air inlet can pre-filter out larger particles to prevent them from entering the subsequent processing stage. This not only protects the downstream equipment, but also helps to ensure the quality of the final product. This utility model provides a more efficient, environmentally friendly and economical dust removal device for slag powder. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the slag powder dust removal device provided in Embodiment 1 of this utility model;

[0022] Figure 2 This is a schematic diagram of the slag powder dust removal device provided in Embodiment 2 of this utility model;

[0023] Figure 3 This is a schematic diagram of the slag powder dust removal device provided in Embodiment 3 of this utility model;

[0024] icon:

[0025] 110. Airflow dispersion box; 111. Flow equalization plate; 112. First chamber; 113. Second chamber; 114. Inlet pipe; 115. Outlet pipe;

[0026] 121. High-voltage electric field box; 122. First discharge electrode; 123. First dust collection electrode;

[0027] 131. Dust collector housing; 132. Second discharge electrode; 133. Second dust collection electrode;

[0028] 141. Vibration motor; 142. Transmission rod; 143. Vibrating hammer assembly;

[0029] 150. Dust collection box; 151. Ash collection channel.

[0030] 160. Return air pipe. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0032] Example 1

[0033] This utility model provides a slag powder dust removal device to increase dust removal efficiency.

[0034] Please see Figure 1 The slag powder dust removal device provided in this embodiment includes: an airflow dispersion unit, including an airflow dispersion box 110 and a flow equalization plate 111 disposed in the airflow dispersion box 110. The flow equalization plate 111 is horizontally arranged and has multiple through holes, which divide the airflow dispersion box 110 into a first chamber 112 and a second chamber 113 connected by the through holes. An air inlet pipe 114 is connected to the top of the first chamber 112, and an air outlet pipe 115 is connected to the bottom of the second chamber 113.

[0035] The high-voltage electric field unit includes a high-voltage electric field box 121 connected to the exhaust pipe 115, and is equipped with a first discharge electrode 122 and a first dust collection electrode 123 with a spacing of 10-50mm inside, which are used to polarize and charge dust particles through corona discharge; the electrostatic dust removal unit includes a dust removal box 131 connected to the high-voltage electric field box 121, and is equipped with a second discharge electrode 132 and a second dust collection electrode 133 with a spacing of 50-100mm inside, where charged dust is deposited on the second dust collection electrode 133 under the action of the electrostatic field;

[0036] The rapping dust removal device includes a vibration motor 141 disposed above the second dust collection electrode 133, a transmission rod 142 connected to the vibration motor 141, and a rapping hammer assembly 143 disposed at the bottom of the transmission rod 142, wherein the rapping hammer assembly 143 maintains a gap of 1-5mm with the surface of the second dust collection electrode 133.

[0037] The dust collection box 150 is connected to the bottom of the second dust collection electrode 133 through the dust collection channel 151.

[0038] The working principle of the above-mentioned slag powder dust removal device is as follows:

[0039] The slag powder mixture gas entering the airflow dispersion unit enters the first chamber 112 through the inlet pipe 114, then diffuses to the second chamber 113 through the through holes on the flow equalization plate 111, and is then discharged from the outlet pipe 115 and enters the high-voltage electric field unit. The charged slag powder flows with the gas to the electrostatic dust removal unit, and moves towards the second dust collection electrode 133 under the action of the electrostatic field and is deposited on it, thus completing the capture of slag powder. The clean air continues to flow upward and flows out of the dust removal box 131.

[0040] When a certain amount of slag powder accumulates on the surface of the second dust collecting electrode 133, the rapping and dust removal device is activated. The vibration motor 141 drives the transmission rod 142 to vibrate up and down. The transmission rod 142 drives the rapping hammer group 143 to strike the second dust collecting electrode 133 downwards, causing the slag powder to detach from the second dust collecting electrode 133 and fall into the dust collection box 150 below, thus completing the separation and collection of slag powder.

[0041] In this embodiment, the vibratory hammer assembly 143 includes multiple spaced titanium alloy hammerheads, each of which is covered with a 2-5mm thick rubber layer. This improves the service life of the vibratory hammer assembly 143, prevents wear of the hammerheads due to prolonged impact, and also reduces the damage to the surface of the second dust collection electrode 133 caused by the vibratory hammer assembly 143.

[0042] In this embodiment, the surface of the second dust collecting electrode 133 is provided with a polytetrafluoroethylene anti-stick coating with a thickness of 0.1-0.3mm. In this embodiment, PTFE is a polymer material with low surface energy, low coefficient of friction, and excellent heat resistance and chemical stability. Coating it on the surface of the second dust collecting electrode 133 can effectively prevent slag powder from sticking to it, which is convenient for subsequent vibration cleaning operations.

[0043] In this embodiment, a filter screen with a mesh size of 80-120 is also provided at the inlet of the air inlet pipe 114 to pre-filter the slag powder mixed gas, which can remove large particulate impurities, reduce the pressure of subsequent processes, and extend the service life of the equipment.

[0044] In this embodiment, the second dust collecting electrode 133 has a honeycomb structure with a honeycomb pore diameter of 3-8 mm and a pore depth of 50-200 mm. The honeycomb pores are arranged in a hexagonal pattern. The honeycomb structure of the second dust collecting electrode 133 can further increase its surface area and improve the capture rate of slag powder.

[0045] In this embodiment, the flow equalization plate 111 is a perforated plate with an opening rate of 30-50%, and the plate body is set at an inclination of 5-15° relative to the horizontal plane, which can better distribute the airflow evenly and allow it to diffuse fully, thereby improving the capture effect of slag powder.

[0046] Example 2

[0047] This utility model provides a slag powder dust removal device to increase dust removal efficiency.

[0048] Please see Figure 2 The slag powder dust removal device provided in Embodiment 2 of this utility model differs from Embodiment 1 only in that, in this embodiment, the working surface of the second dust collecting electrode 133 is serrated, with a serration depth of 5-15mm and a serration spacing of 10-20mm, which is beneficial to increase its surface area and thus improve the capture efficiency of slag powder.

[0049] Example 3

[0050] This utility model provides a slag powder dust removal device to increase dust removal efficiency.

[0051] Please see Figure 3 The slag powder dust removal device provided in Embodiment 3 of this utility model differs from Embodiment 1 only in that, in this embodiment, a return air pipe 160 is provided, which connects the top of the dust removal box 131 to the air inlet pipe 114 of the airflow dispersion unit. The return air pipe 160 is equipped with a valve to ensure that the system is in the best operating state. After the electrostatic dust removal unit completes the capture of slag powder, the clean air continues to flow upward and returns to the airflow dispersion unit through the return air pipe, repeating the above cycle. The return airflow rate is controlled by adjusting the opening angle of the return air pipe valve.

[0052] Example 4

[0053] This utility model provides a slag powder dust removal device to increase dust removal efficiency.

[0054] The slag powder dust removal device provided in Embodiment 4 of this utility model differs from Embodiment 1 only in that, in this embodiment, a screw conveyor connected to the dust collection box 150 is also provided to transport the dust to the next device.

[0055] The embodiments of this utility model have at least the following advantages:

[0056] In this invention, dust particles in the gas are polarized and charged by the high-voltage electric field unit when passing through it. This design allows even PM2.5 particles with a diameter of less than 2.5 μm to be effectively captured. Upon entering the electrostatic precipitator unit, the charged dust particles rapidly move to the second collecting electrode and settle under the influence of the electrostatic field. This combination of multi-stage corona discharge and electrostatic field technology significantly improves the overall dust removal efficiency. Dust adhering to the second collecting electrode is periodically removed by a rapping cleaning device and enters the dust collection box. In particular, the design using titanium alloy hammers with a rubber coating not only reduces damage to the collecting electrode but also improves cleaning efficiency and reduces equipment maintenance costs. Furthermore, the application of a polytetrafluoroethylene (PTFE) anti-stick coating makes it difficult for dust to adhere to the surface of the collecting electrode, further simplifying the cleaning process. The serrated working surface design increases the dust collection area, improving dust removal efficiency while also enhancing the stability and durability of the equipment. The honeycomb structure of the second dust collection electrode further optimizes space utilization and dust collection effect. It not only effectively reduces dust emissions during the production of slag powder and lowers the risk of environmental pollution, but also realizes the recycling of waste gas through the design of the exhaust gas recovery unit, reducing the impact on the external environment and embodying the concept of green environmental protection. The filter screen set at the air inlet can pre-filter out larger particles to prevent them from entering the subsequent processing stage. This not only protects the downstream equipment, but also helps to ensure the quality of the final product. This utility model provides a more efficient, environmentally friendly and economical dust removal device for slag powder.

[0057] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A dust removal device for slag powder, characterized in that, The utility model relates to a high-voltage electrostatic dust catcher, and belongs to the field of dust removal. The utility model discloses a high-voltage electrostatic dust catcher, which comprises a gas flow dispersion unit, a high-voltage electric field unit and an electrostatic dust removal unit. The gas flow dispersion unit comprises a gas flow dispersion box and a flow uniformizing plate arranged in the gas flow dispersion box. The flow uniformizing plate is horizontally arranged and is provided with a plurality of through holes, which divide the gas flow dispersion box into a first chamber and a second chamber connected through the through holes. An air inlet pipe is connected to the top of the first chamber, and an air outlet pipe is connected to the bottom of the second chamber. The high-voltage electric field unit comprises a high-voltage electric field box connected to the air outlet pipe and internally provided with a first discharge electrode and a first dust collecting electrode arranged at intervals.

2. The fine slag dust removing device according to claim 1, characterized by The high-voltage electric field box is used to polarize and charge dust particles through corona discharge.

3. The device for removing dust from the superfine slag powder according to claim 1, characterized in that, The electrostatic dust removal unit comprises a dust removal box connected to the high-voltage electric field box and internally provided with a second discharge electrode and a second dust collecting electrode arranged at intervals.

4. The device for removing dust from the superfine slag powder according to claim 1, characterized in that, The charged dust is deposited on the second dust collecting electrode under the action of an electrostatic field.

5. The device for removing dust from the superfine slag powder according to claim 1, characterized in that, The dust removal box is provided with a vibration motor arranged above the second dust collecting electrode, a transmission rod connected to the vibration motor and a rapping hammer group arranged at the bottom of the transmission rod.

6. The device for removing dust from the superfine slag powder according to claim 1, characterized in that, The rapping hammer group is arranged in a gap with the surface of the second dust collecting electrode.

7. The device for removing dust from the superfine slag powder according to claim 1, characterized in that, The dust collecting box is connected to the bottom of the second dust collecting electrode through a dust falling channel.

8. The device for removing dust from the superfine slag powder according to claim 1, characterized in that, The rapping hammer group comprises a plurality of titanium alloy hammer heads arranged at intervals. Each hammer head is coated with a rubber layer with a thickness of 2-5 mm. The surface of the second dust collecting electrode is provided with a polytetrafluoroethylene anti-sticking coating with a thickness of 0.1-0.3 mm. The working surface of the second dust collecting electrode is in a sawtooth shape. The sawtooth depth is 5-15 mm, and the sawtooth spacing is 10-20 mm. The utility model further comprises a filter screen arranged at the inlet of the air inlet pipe. The filter screen has a mesh number of 80-120. The utility model further comprises a return air pipe connected to the top of the dust removal box and the air inlet pipe of the gas flow dispersion unit. The return air pipe is provided with a valve. The second dust collecting electrode has a honeycomb structure. The honeycomb aperture is 3-8 mm, the hole depth is 50-200 mm, and the honeycomb holes are arranged in a hexagonal shape. The flow uniformizing plate is a porous plate. The opening rate is 30-50%, and the plate body is arranged to be inclined to the horizontal plane by 5-15°.

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