Multi-tube electrocoagulation dust removal device

Abstract

The invention relates to the technical field of environmental protection equipment, in particular to a multi-tube electrocoagulation dust removal device which comprises a support, an upper box body, a middle box body, a lower box body, a dust hopper, a support and a cyclone, and each cyclone comprises an outer cylinder, a cone, an inner cylinder, a flow guide mechanism, a first cathode line and an anode cylinder; the upper opening of the outer cylinder is connected with the circular hole of the second pattern plate, and the lower opening of the outer cylinder and the cone are connected to the third pattern plate; an upper opening of the inner cylinder body is connected with the round hole of the first pattern plate, a lower opening of the inner cylinder body is inserted into the outer cylinder body, and the inner cylinder body and the outer cylinder body are coaxial; the first cathode wire is made of a metal material, is provided with a plurality of tips on the surface, and is wound on the inner cylinder; and the anode cylinder is mounted on the inner surfaces of the outer cylinder and the cone. The first cathode wire is wound on the inner cylinder, the anode cylinder is attached to the inner surfaces of the outer cylinder and the cone, and a stable electric field with one long end is formed. According to the invention, full contact between flue gas and the first cathode wire is ensured, and the discharge efficiency is improved, so that the dust removal efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of environmental protection equipment, and in particular to a multi-tube electric coagulation dust removal device. Background Art

[0002] In the field of gas dust removal technology, commonly used dust removal methods include gravity dust removal, cyclone dust removal, electrostatic precipitator and bag dust removal. However, these methods each have their own applicable conditions and limitations. Gravity dust removal, as a primary dust removal method, is mainly suitable for removing large particles in the gas, but its dust removal efficiency is relatively low. Cyclone dust removal separates particles from the airflow through the action of centrifugal force, and the dust removal efficiency can reach about 70%, but there is still room for improvement. Although bag dust removal has a good dust removal effect, it is limited by its material properties and can only be used in environments with temperatures not exceeding 200°C, which limits its scope of application. As for electrostatic precipitator, although it can effectively remove fine particles, its high cost and large floor space have become issues that cannot be ignored.

[0003] In the prior art, patent CN108580067B discloses a cyclone electrostatic precipitator and a cyclone electrostatic precipitator equipment, which includes an electrostatic precipitator shell, a plurality of cyclones and a sonic back-blowing device. The interior of the electrostatic precipitator shell is provided with an upper partition and a lower partition that divide the interior of the electrostatic precipitator shell into a first chamber and a second chamber. The plurality of cyclones are arranged in the second chamber and one end of each cyclone passes through the upper partition and extends into the first chamber, and the other end passes through the lower partition and extends in a direction away from the first chamber. Each cyclone is provided with a cathode wire for connecting to a power supply device. The sonic back-blowing device is arranged in the electrostatic precipitator shell corresponding to the first chamber. The precipitator integrates the two functions of cyclone dust removal and electrostatic precipitator, and coupled with the sonic back-blowing oscillation, not only the dust removal efficiency is higher, but also manual cleaning and maintenance are avoided. The dust removal equipment including the above-mentioned dust collector has higher dust removal efficiency and is easy to use. However, the patent only describes the arrangement of the cathode wires, and it is unclear how to set up the anode system. In addition, the arrangement of the cathode wires is unreasonable. A long section of the cathode wire passes through the exhaust pipe, which will affect the rotational outflow of the gas. Therefore, this type of dust collector urgently needs a reasonable arrangement structure of the cathode and anode to improve the dust removal efficiency and reduce the system resistance. Summary of the invention

[0004] The problem solved by the invention is: in order to solve the unreasonable arrangement of cathodes and anodes in the prior art, a multi-tube electro-coagulation dust removal device with reasonable arrangement of cathodes and anodes, high dust removal efficiency and low system resistance is provided.

[0005] The present invention is implemented through the following technical scheme: a multi-tube electrocoagulation dust removal device, including a bracket, an upper box, a middle box, a lower box, an ash hopper, a bracket, and a cyclone; The middle box body is provided with a smoke inlet; The upper box body is provided with a smoke outlet; The upper box body and the middle box body are separated by a first flower plate; The middle box body and the lower box body are separated by a second flower plate; The lower box body and the ash hopper are separated by a third flower plate; There are several cyclones, each of which includes: an outer cylinder, a cone, an inner cylinder, a flow guide mechanism, a first cathode line, and an anode cylinder; The upper opening of the outer cylinder is connected to the circular hole of the second flower plate, and the lower opening of the outer cylinder is connected to the cone; The bottom of the cone is connected to the circular hole of the third flower plate; The upper opening of the inner cylinder is connected to the circular hole of the first flower plate, the lower opening of the inner cylinder is inserted into the outer cylinder, and the inner cylinder and the outer cylinder are coaxial; The flow guiding mechanism can promote the rotation and advancement of the gas between the inner cylinder and the outer cylinder; The first cathode wire is made of metal, has a plurality of sharp tips on its surface, and is wound around the inner cylinder; The anode cylinder is installed on the inner surfaces of the outer cylinder and the cone.

[0006] Furthermore, the distance between the inner cylinder and the outer cylinder is between 150 mm and 400 mm.

[0007] Furthermore, the first cathode wire is a sawtooth metal plate formed by bending both sides and spirally winding. The formed first cathode wire is provided with a strip bottom that fits the surface of the inner cylinder and two rows of triangular spikes on the strip bottom.

[0008] Furthermore, the guide mechanism comprises a spiral guide plate, and the spiral guide plate is installed between the inner cylinder and the outer cylinder.

[0009] Furthermore, the flow guiding mechanism comprises a volute, which is located above the outer cylinder, and an inlet is arranged on the side of the volute, and the inner cylinder passes through the top of the volute, and the volute is sealedly connected to the second flower plate and the inner cylinder.

[0010] Furthermore, the flow guiding mechanism includes a plurality of fan blades, which are inclined and evenly distributed along the circumference and are located between the inner cylinder and the outer cylinder.

[0011] Furthermore, the fan blades are provided in two groups, which are respectively located near the upper opening of the outer cylinder and near the lower opening of the inner cylinder.

[0012] Furthermore, the smoke inlet is provided with an atomization and humidification mechanism.

[0013] Furthermore, a second cathode wire is provided, and a plurality of second cathode wires are provided and are horizontally arranged at the smoke inlet.

[0014] Furthermore, the outer cylinder, inner cylinder and cone are all made of ceramic materials.

[0015] The beneficial effects of the present invention are: 1. The electric field structure of the present invention is more reasonable. By optimizing the positions of the cathode and the anode, the first cathode wire is wound around the inner cylinder, and the anode cylinder is attached to the inner surface of the outer cylinder and the cone, forming a stable electric field with a longer end. The present invention ensures full contact between the flue gas and the first cathode wire, improves the discharge efficiency, and thus improves the dust removal efficiency.

[0016] 2. The cathode wire of the present invention is spirally wound on the inner cylinder, which is more stable than the method of tightening and fixing at both ends and is not easy to loosen or be damaged.

[0017] 3. The inner cylinder and the outer cylinder of the present invention are both made of ceramic material, which is a good insulating material and avoids the risk of leakage between the anode and the cathode.

[0018] 4. The cathode line does not pass through the center of the inner cylinder, and will not affect the upward airflow of the inner vortex, so the resistance is low. At the same time, the stepped flower plate design in the third embodiment allows the airflow to enter the cyclone tangently without turning, further reducing the system resistance.

[0019] 5. The various guide mechanisms of the present invention are reasonably arranged, and spiral guide plates, volutes, and fan blades can be used, all of which can enable the smoke to enter between the inner cylinder and the outer cylinder better from the tangential direction, improve the guide effect, and further enhance the dust removal effect.

[0020] 6. The present invention sets a second cathode line to perform pre-discharge at the smoke inlet, ionize part of the dust in advance, and share part of the work for the first cathode line, thereby further improving the dust removal efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a front view of the multi-tube electrocoagulation dust removal device in Example 1; Figure 2 A three-dimensional view of the multi-tube electrocoagulation dust removal device in Example 1; Figure 3 is a three-dimensional cross-sectional view of the cyclone in the first embodiment; Figure 4 This is a schematic structural diagram of a first cathode line in Embodiment 1; Figure 5 It is a front view of the multi-tube electrocoagulation dust removal device in the second embodiment; Figure 6 A three-dimensional view of the back side of the multi-tube electrocoagulation dust removal device in Example 2; Figure 7is a three-dimensional cross-sectional view of the cyclone in the second embodiment; Figure 8 It is a front view of the multi-tube electrocoagulation dust removal device in Example 3; Fig. 9 It is a front view of the multi-tube electrocoagulation dust removal device in the fourth embodiment; Fig.10 A three-dimensional view of the multi-tube electrocoagulation dust removal device in Example 4; Fig.11 is a three-dimensional cross-sectional view of the cyclone in the fourth embodiment; Fig.12 This is a partial enlarged view of the second cathode line in Example 5.

[0022] In the figure: 1 support; 2 upper box; 3 middle box; 4 lower box; 5 ash hopper; 6 cyclone; 601 outer cylinder; 602 cone; 603 inner cylinder; 604 flow guide mechanism; 605 first cathode line; 606 anode cylinder; 7 first flower plate; 8 second flower plate; 9 third flower plate; 10 atomization humidification mechanism; 11 second cathode line. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Embodiment 1

[0024] like Figure 1-4 As shown, a multi-tube electrocoagulation dust removal device comprises a bracket 1, an upper box body 2, a middle box body 3, a lower box body 4, an ash hopper 5, and a cyclone 6; the bracket 1 is welded by section steel and is used to support the dust removal device body, and the upper box body 2, the middle box body 3, the lower box body 4, and the ash hopper 5 are arranged on the bracket 1 from top to bottom in sequence, and the middle box body 3 is provided with a smoke inlet, which is arranged in a trumpet diffusion shape. If necessary, an air equalization plate can be added, and the smoke inlet is provided with an atomizing humidification mechanism 10; the upper box body 2 is provided with a smoke outlet, which is consistent with the smoke inlet and is in a trumpet contraction shape; the upper box body 2 and the middle box body 3 are separated by a first flower plate 7; the middle box body 3 and the lower box body 4 are separated by a second flower plate 8; the lower box body 4 and the ash hopper 5 are separated by a third flower plate 9; The cyclones 6 are provided in a plurality, and in this embodiment, 25 are provided, arranged in five rows and five columns. Each cyclone 6 comprises: an outer cylinder 601, a cone 602, an inner cylinder 603, a flow guide mechanism 604, a first cathode line 605, and an anode cylinder 606; The upper opening of the outer cylinder 601 is connected to the circular hole of the second flower plate 8, and the lower opening of the outer cylinder 601 is connected to the cone 602; The bottom of the cone 602 is connected to the circular hole of the third flower plate 9; The upper opening of the inner cylinder 603 is connected to the circular hole of the first flower plate 7, and the lower opening of the inner cylinder 603 is inserted into the outer cylinder 601. The inner cylinder 603 and the outer cylinder 601 are coaxial. The flow guiding mechanism 604 can promote the rotation and advancement of the gas between the inner cylinder and the outer cylinder; The first cathode wire 605 is made of metal, has several sharp tips on its surface, and is wound around the inner cylinder 603; the guide mechanism 604 of this scheme includes a spiral guide plate, which is installed between the inner cylinder 603 and the outer cylinder 601. The spiral guide plate is a single spiral structure with a pitch of 100 mm and is also made of ceramic.

[0025] The anode cylinder 606 is installed on the inner surfaces of the outer cylinder 601 and the cone 602 . The anode cylinder 606 is made by winding and welding metal plates and is arranged to fit the inner surfaces of the outer cylinder 601 and the cone 602 .

[0026] In this embodiment, the first cathode wire 605 is formed by bending two sides of a serrated metal plate and spirally winding. The formed first cathode wire 605 is provided with a strip bottom that fits the surface of the inner cylinder 603 and two rows of triangular spikes on the strip bottom.

[0027] The outer cylinder 601, the inner cylinder 603 and the cone 602 are all made of ceramic materials. Ceramics are good insulating materials that can prevent leakage between the anode and the cathode. Ceramics are also very wear-resistant materials and do not require frequent maintenance.

[0028] Generally, depending on the power supply voltage, the spacing between the inner cylinder 603 and the outer cylinder 601 is between 150mm and 400mm, which is the inter-pole spacing from the first cathode line 605 to the anode cylinder 606. The inter-pole spacing can be reasonably matched according to the power supply voltage. In this solution, the outer diameter of the inner cylinder 603 is 200mm, the outer diameter of the outer cylinder 601 is 600mm, and the spacing between the inner cylinder 603 and the outer cylinder 601 is 200mm.

[0029] During operation, the flue gas carrying dust enters the middle box 3 from the flue gas inlet. The atomizing humidification mechanism 10 at the flue gas inlet increases the humidity of the flue gas, improves the conductivity of the flue gas, and makes it easier to carry electrons. The flue gas is divided after the middle box 3 and enters each cyclone 6. The flue gas first passes through the guide mechanism 604, and along the single spiral cavity, the flue gas flow begins to rotate along the wall of the cylinder. This rotational motion is called an outer vortex. During the rotation process, the dust particles in the airflow are affected by the centrifugal force due to inertia and gradually move toward the anode cylinder 606. The magnitude of the centrifugal force is proportional to the tangential speed of the airflow. The faster the rotation speed, the greater the centrifugal force on the dust particles, and the easier it is to be thrown toward the anode cylinder 606. At the same time, during the rotation process, the high-voltage power supply emits a pulse current to ionize the flue gas, so that the flue gas passing through is negatively charged, and the anode cylinder 606 located outside the outer cylinder 601 is the positive electrode. A stable electric field is formed between the anode cylinder 606 and the first cathode line 605. The dust carrying negative charge is affected by the electric field and moves closer to the inner wall of the anode cylinder 606. Under the dual effects of inertia and the electric field, the dust is accelerated to move closer to the anode cylinder 606. The dust particles reaching the inner wall of the anode cylinder 606 move downward along the inner wall of the anode cylinder 606 under the combined action of airflow and gravity, and finally pass through the third flower plate 9 and deposit in the ash hopper 5, realizing the separation of dust and gas. After reaching the bottom of the cone 602, the outer vortex airflow will turn and rotate upward along the axis to form an inner vortex. The purified gas is discharged from the top exhaust pipe of the dust collector through the action of the inner vortex, enters the upper box 2 and converges, and finally leaves from the flue gas outlet to complete the entire dust removal process.

[0030] Compared with the prior art, the present solution optimizes the positions of the cathode and the anode. The first cathode wire 605 of the present solution is wound around the inner cylinder 603, and the anode cylinder 606 is attached to the inner surface of the outer cylinder 601 and the cone. It can be thought of as a stable electric field with a longer end. The flue gas needs to rotate multiple times between the inner cylinder 603 and the outer cylinder 601 when it just enters. During this period, the flue gas and the first cathode wire 605 can be fully in contact, thereby improving the discharge efficiency and thus the dust removal efficiency. In addition, the cathode wire is easy to fix. Compared with tightening and fixing at both ends, spirally winding on the inner cylinder 603 can be more stable. Both the inner cylinder 603 and the outer cylinder 601 are made of ceramic material, so there is no need to worry about leakage. The cathode wire does not pass through the center of the inner cylinder 603, and will not affect the rotating upward airflow of the inner vortex, so the resistance is also low. Embodiment 2

[0031] like Figure 5-7As shown, the difference from the first embodiment is that the structure of the guide mechanism 604 is different. The guide mechanism 604 of the second embodiment includes a volute, which is located above the outer cylinder 601. An inlet is arranged on the side of the volute, and the inner cylinder 603 passes through the top of the volute. The volute is sealed and connected to the second flower plate 8 and the inner cylinder 603. The inlet of the volute is directly opposite to the inlet of the flue gas. Compared with the spiral guide plate, the flue gas can enter between the inner cylinder 603 and the outer cylinder 601 from the tangential direction, and the guide effect is better. In addition, the position where the spiral guide plate was originally installed can increase the number of winding turns of the first cathode line 605, increase the effective length of the electric field in a directional manner, and improve the dust removal efficiency. Embodiment 3

[0032] like Figure 8 As shown, this embodiment is improved on the basis of the second embodiment, the second flower plate 8 and the third flower plate 9 are both stepped, the volute inlet of the swirl 6 away from the smoke inlet can be exposed, the rear volute inlet will not be blocked by the front volute, and the airflow entering the middle box 3 can enter the swirl 6 tangently without turning, which greatly reduces the system resistance. Embodiment 4

[0033] like Figure 9-11 As shown, the difference from the above embodiments is that the structure of the guide mechanism 604 is different. The guide mechanism 604 of embodiment four includes two groups of fan blades, which are respectively located near the upper end of the outer cylinder 601 and the lower end of the inner cylinder 603. Each group of fan blades is inclined and evenly distributed along the circumference, and is located between the inner cylinder 603 and the outer cylinder 601. The airflow passing through the fan blades will rotate along the direction of the blades. Two groups are provided to prevent the rotation force of one group of fan blades from being weak, thereby ensuring that the smoke can maintain consistent rotation between the inner cylinder 603 and the outer cylinder 601. Embodiment 5

[0034] like Fig.12 As shown, the difference from the above embodiments is that: a second cathode line 11 is also provided, and a plurality of the second cathode lines 11 are provided, and are horizontally arranged at the flue gas inlet. The main purpose is that after the atomizing humidification mechanism 10 increases the humidity, the second cathode line 11 performs pre-discharge, ionizes part of the dust in advance, and shares part of the work for the first cathode line 605, which can improve the dust removal efficiency.

[0035] In summary, the multi-tube electrocoagulation dust removal device described in the present invention has a more reasonable electric field structure, which improves the discharge efficiency and thus improves the dust removal efficiency.

[0036] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the above implementation is only to illustrate the technical concept and features of the present invention, and its purpose is to enable people familiar with this technology to understand the content of the present invention and implement it, and it cannot be used to limit the protection scope of the present invention. All equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A multi-tube electrocoagulation dust removal device, characterized in that: It comprises a bracket (1), an upper box body (2), a middle box body (3), a lower box body (4), an ash hopper (5), and a cyclone (6); The middle box body (3) is provided with a smoke inlet; The upper box body (2) is provided with a smoke outlet; The upper box body (2) and the middle box body (3) are separated by a first flower plate (7); The middle box body (3) and the lower box body (4) are separated by a second flower plate (8); The lower box body (4) and the ash hopper (5) are separated by a third flower plate (9); A plurality of cyclones (6) are provided, each cyclone (6) comprising: an outer cylinder (601), a cone (602), an inner cylinder (603), a flow guide mechanism (604), a first cathode line (605), and an anode cylinder (606); The upper opening of the outer cylinder (601) is connected to the circular hole of the second flower plate (8), and the lower opening of the outer cylinder (601) is connected to the cone (602); The bottom of the cone (602) is connected to the circular hole of the third flower plate (9); The upper opening of the inner cylinder (603) is connected to the circular hole of the first flower plate (7), the lower opening of the inner cylinder (603) is inserted into the outer cylinder (601), and the inner cylinder (603) and the outer cylinder (601) are coaxial; The flow guiding mechanism (604) can promote the rotation and advancement of the gas between the inner cylinder and the outer cylinder; The first cathode wire (605) is made of metal, has a plurality of sharp points on its surface, and is wound around the inner cylinder (603); The anode cylinder (606) is installed on the inner surfaces of the outer cylinder (601) and the cone (602).

2. A multi-tube electrocoagulation dust removal device according to claim 1, characterized in that: The distance between the inner cylinder (603) and the outer cylinder (601) is between 150 mm and 400 mm.

3. A multi-tube electrocoagulation dust removal device according to claim 1, characterized in that: The first cathode wire (605) is a sawtooth metal plate formed by bending both sides and spirally winding. The formed first cathode wire (605) is provided with a strip bottom that fits the surface of the inner cylinder (603) and two rows of triangular spikes on the strip bottom.

4. A multi-tube electrocoagulation dust removal device according to claim 1, characterized in that: The flow guide mechanism (604) comprises a spiral flow guide plate, and the spiral flow guide plate is installed between the inner cylinder (603) and the outer cylinder (601).

5. The multi-tube electrocoagulation dust removal device according to claim 1, characterized in that: The flow guiding mechanism (604) comprises a volute, which is located above the outer cylinder (601). An inlet is provided on the side of the volute. The inner cylinder (603) passes through the top of the volute. The volute is sealedly connected to the second flower plate (8) and the inner cylinder (603).

6. A multi-tube electrocoagulation dust removal device according to claim 1, characterized in that: The flow guiding mechanism (604) comprises a plurality of fan blades, which are inclined and evenly distributed along the circumference and are located between the inner cylinder (603) and the outer cylinder (601).

7. A multi-tube electrocoagulation dust removal device according to claim 6, characterized in that: The fan blades are provided in two groups, and are respectively located near the upper opening of the outer cylinder (601) and near the lower opening of the inner cylinder (603).

8. The multi-tube electrocoagulation dust removal device according to claim 1, characterized in that: The smoke inlet is provided with an atomization and humidification mechanism (10).

9. The multi-tube electrocoagulation dust removal device according to claim 1, characterized in that: A second cathode wire (11) is also provided, and a plurality of second cathode wires (11) are provided and are horizontally arranged at the smoke inlet.

10. The multi-tube electrocoagulation dust removal device according to claim 1, characterized in that: The outer cylinder (601), the inner cylinder (603), and the cone (602) are all made of ceramic materials.

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