Magnetic focusing type flue gas purification device and flue gas treatment system

Abstract

The application relates to the technical field of flue gas treatment, and particularly discloses a magnetic focusing type flue gas purification device and a flue gas treatment system. The flue gas purification device comprises a main flue gas pipe, the main flue gas pipe is used for receiving flue gas, an electric charging structure is arranged at the upstream end of the main flue gas pipe, and a first fan is arranged at the downstream end of the main flue gas pipe. The first fan generates suction force to enable the flue gas to pass through the negative electric charging structure and enter the main flue gas pipe, and the electric charging structure is used for charging the particles in the flue gas. Downstream of the electric charging structure, the purification device is provided with a magnetic element, the magnetic element is used for generating a magnetic field to deflect and gather the charged particles in the flue gas. Downstream of the magnetic field, a purification unit is arranged, the purification unit is used for purifying the charged particles deflected by the magnetic field. The magnetic field is used for screening and gathering the particles in the large-flow flue gas to the purification unit, so that the purification unit can adsorb the particles under the condition of small air volume, and the energy consumption of the purification device is further reduced.

Description

Technical Field

[0001] This invention relates to the field of flue gas treatment technology, and in particular to a magnetic focusing flue gas purification device and flue gas treatment system. Background Technology

[0002] In waste gas treatment projects, if a relatively small purifier is used to treat a large volume of low-concentration (low content of organic matter or particulate matter) waste gas, the gas flow rate will increase proportionally as the air volume passes through the relatively small purifier. As a result, the residence time of the waste gas in the small purifier will be relatively reduced, leading to poor treatment effect.

[0003] Alternatively, large-scale purification equipment can be used to treat this large volume of low-concentration waste gas. However, such equipment is large in size and consumes a lot of power, resulting in high equipment and operating costs. Therefore, a balance cannot be struck between treatment cost and treatment effectiveness when dealing with large volumes of low-concentration waste gas.

[0004] Therefore, existing technologies still need to be improved and developed. Summary of the Invention

[0005] This invention discloses a magnetic focusing flue gas purification device and flue gas treatment system to improve the problem of high energy consumption when treating large volume, low concentration of waste gas.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] The magnetic focusing flue gas purification device includes:

[0008] The main flue gas pipe is used to collect flue gas.

[0009] The first fan is installed at the end of the main flue gas duct;

[0010] An electrifying structure is installed upstream of the main flue gas pipe, and the electrifying structure is used to charge the particulate matter in the flue gas.

[0011] A magnetic element is located downstream of the electrified structure. The magnetic element is used to generate a magnetic field, which is used to deflect and gather charged particles in the flue gas.

[0012] A purification unit for purifying charged particulate matter, the purification unit comprising:

[0013] The first flue gas branch pipe is connected at one end to the main flue gas pipe and is used to guide the particulate matter deflected by the magnetic field.

[0014] The first purification structure is connected to the other end of the first flue gas branch pipe and is used to adsorb particulate matter deflected by the magnetic field.

[0015] The second fan is installed at the air outlet of the first purification structure;

[0016] The second flue gas branch pipe has one end connected to the outlet of the second fan, and the other end connected to the downstream of the main flue gas pipe.

[0017] Preferably, the first purification structure includes a housing, a first electrostatic field, and a second electrostatic field, both of which are installed inside the housing.

[0018] Preferably, the first electrostatic field is a cylindrical electrostatic field, the second electrostatic field is a plate electrostatic field, and the first electrostatic field is located upstream of the second electrostatic field.

[0019] Preferably, both the air inlet and air outlet of the housing are provided with air distribution plates.

[0020] Preferably, the magnetic focusing flue gas purification device further includes a second purification structure, which is installed on the main flue gas pipe and located between the second flue gas branch pipe and the first fan.

[0021] Preferably, the first flue gas branch pipe includes a variable diameter section and a connecting section. The connecting section is a constant diameter pipe. One end of the connecting section is connected to the variable diameter section, and the other end of the connecting section is connected to the air inlet of the housing. The first end of the variable diameter section is connected to the main flue gas pipe, and the second end of the variable diameter section is connected to the connecting section. The cross-sectional area of ​​the first end is much larger than the cross-sectional area of ​​the second end.

[0022] Preferably, the cross-sectional area of ​​the second end is much smaller than the cross-sectional area of ​​the main flue gas pipe.

[0023] Preferably, the electrified structure is an electrostatic field.

[0024] Preferably, the magnetic field is a uniform magnetic field, and the magnetic element is one of a energized solenoid, a permanent magnet, or a parallel current-carrying coil.

[0025] The present invention also discloses a flue gas treatment system, which includes the magnetic focusing flue gas purification device as described above.

[0026] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0027] This invention provides a magnetic focusing flue gas purification device, including a main flue gas pipe for receiving flue gas. An electrified structure is installed at the upstream end of the main flue gas pipe, and a first fan is installed at the downstream end. The first fan generates suction, causing the flue gas to pass through the electrified structure and enter the main flue gas pipe. The electrified structure charges the particles in the flue gas. Downstream of the electrified structure, the purification device is equipped with a magnetic element that generates a magnetic field to deflect and gather the charged particles in the flue gas. Downstream of the magnetic field is a purification unit for purifying the charged particles deflected by the magnetic field. The purification unit includes a first flue gas branch pipe, a second flue gas branch pipe, a first purification structure, and a second fan located between the first and second flue gas branch pipes. One end of the first flue gas branch pipe is connected to the main flue gas pipe. The charged particles gathered by the magnetic field are guided by the first flue gas branch pipe to the first purification structure for purification. The second fan mainly provides suction to allow the charged particles to enter the first purification structure. The gas purified by the first purification structure is discharged into the main flue gas pipe through the second flue gas branch pipe, and finally exits the magnetic focusing flue gas purification device through the first fan. In this application, a magnetic field is set up to cause a small amount of particulate matter in the large flow of flue gas to gather in the first flue gas branch pipe. After the first flue gas branch pipe is enriched with charged particles, it forms a small flow of high-concentration flue gas. The smaller flow rate of the flue gas allows the smaller first flue gas purification structure to clean the particulate matter in the flue gas. At the same time, since the particles are already charged before entering the electric field, they can be more thoroughly purified by the first purification structure under the action of the electric field.

[0028] Furthermore, the present invention also discloses a flue gas purification system that includes the above-mentioned magnetic focusing flue gas purification device and possesses all the advantages of the flue gas purification device. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of a magnetic focusing flue gas purification device provided in an embodiment of the present invention;

[0030] Figure 2 This is a schematic diagram illustrating the principle of magnetic field focusing of particulate matter in flue gas according to an embodiment of the present invention;

[0031] Figure 3 This is a schematic diagram of the first structure of a first purification structure provided in an embodiment of the present invention;

[0032] Figure 4 This is a schematic diagram of the second structure of the first purification structure provided in an embodiment of the present invention;

[0033] Figure 5 This is a first cross-sectional view of a first purification structure provided in an embodiment of the present invention;

[0034] Figure 6This is a second cross-sectional view of a first purification structure provided in an embodiment of the present invention;

[0035] Figure 7 This is a third cross-sectional view of a first purification structure provided in an embodiment of the present invention;

[0036] Figure 8 for Figure 5 Enlarged view of the central A department;

[0037] Figure 9 for Figure 5 Enlarged view of the B-section of the organization.

[0038] Explanation of main component symbols: 10-Main flue gas pipe, 20-First fan, 30-Electrified structure, 40-Magnetic component, 50-Purification unit, 51-First flue gas branch pipe, 511-Reducing diameter section, 5111-First end, 5112-Second end, 512-Connecting part, 52-First purification structure, 521-Casing, 5211-Air inlet, 5212-Air outlet, 5213-Connecting plate, 5214-Sealing strip, 5215-Drainage trough, 522-First electrostatic field, 523-Second electrostatic field, 524-Distribution box, 525-Handle, 53-Second fan, 54-Second flue gas branch pipe, 55-Air distribution plate, 60-Second purification structure, H-Large flow flue gas carrying a small amount of particulate matter, J-Large flow flue gas without particulate matter, K-Magnetic field, L-Small flow flue gas carrying a large amount of particulate matter. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] In this invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing the invention and its embodiments, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to be constructed and operated in a specific orientation.

[0041] Furthermore, some of the aforementioned terms, besides indicating direction or positional relationships, may also have other meanings. For example, the term "above" may, in certain circumstances, indicate a dependency or connection. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0042] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0043] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0044] The technical solution of the present invention will be further described below with reference to the embodiments and accompanying drawings.

[0045] Example

[0046] When treating large-volume flue gas with low concentrations of organic or particulate matter, if a small flue gas purifier, such as a small electrostatic field, is used, the flow rate of the flue gas will increase exponentially due to the large flue gas flow rate and the limited cross-sectional area of ​​the small electrostatic field. This results in most organic or particulate matter not being adsorbed by the anode plate.

[0047] However, when using large-scale purifiers such as large electrostatic fields to purify large-volume flue gas, the large-scale purifiers such as large electrostatic fields have a large processing area (cross-sectional area), and the flow rate of the flue gas during processing will not be too high. Although it can clean the particulate matter in the flue gas, the large-scale purifiers such as large electrostatic fields require high power consumption to keep running, and the cost of the entire set of large equipment is also higher.

[0048] It should be understood that the particulate matter mentioned below includes small particles such as dust particles and atomized organic particles that are able to remain suspended in the air.

[0049] Therefore, this invention provides a magnetic focusing flue gas purification device, referring to... Figure 1The flue gas purification device includes a main flue gas pipe 10, which collects the flue gas generated throughout the production process. An electrified structure 30 is installed at the end of the main flue gas pipe 10 closest to the production equipment. The electrified structure 30 causes particulate matter in the flue gas entering the main flue gas pipe 10 to carry a certain amount of electrons. A first fan 20 is installed at the end of the main flue gas pipe 10. When the first fan 20 operates, the flue gas moves towards the fan 20, passes through the electrified structure 30, and the particulate matter in the flue gas adsorbs the free electrons at the electrified structure 30.

[0050] Specifically, the electrified structure 30 is a low-voltage electrostatic field. When the flue gas passes through the area of ​​the low-voltage electrostatic field, electrons will be attached to the particles in the flue gas. The electrostatic field is chosen to be low-voltage because its main function is to provide electrons, thus allowing for low-power movement.

[0051] Combination Figure 1 and Figure 2 A magnetic element 40 is provided downstream of the electrified structure 30. The magnetic element 40 is used to generate an electric field and is installed on the main flue gas pipe 10. After the magnetic element 40 generates a magnetic field, the particles carrying electrons move by cutting magnetic field lines when passing through the magnetic field. At this time, the particles carrying electrons will be affected by the magnetic field force, i.e., the Lorentz force.

[0052] Reference Figure 1 In this invention, a purification unit 50 is also provided beside the magnetic element 40. The purification unit 50 is used to purify (adsorb) charged particulate matter. The purification unit 50 includes a first flue gas branch pipe 51, one end of which is connected to the main flue gas pipe 10, and the other end of which is connected to a first purification structure 52. The outlet end of the purification structure is connected to a second fan 53. A second flue gas branch pipe 54 is provided beside the second fan 53, one end of which is connected to the outlet end of the second fan 53, and the other end of which is connected to the other end of the main flue gas pipe 10. The end of the first flue gas branch pipe 51 connected to the main flue gas pipe 10 is located at the downstream end of the magnetic field, and this end is used to collect the particulate matter that has been deflected by the magnetic field after passing through it. In conjunction with the negative pressure generated by the second fan 53 drawing air into the first flue gas branch pipe 51, a small amount of particulate matter in the flue gas will be deflected after passing through the magnetic field and will all enter the first flue gas branch pipe 51.

[0053] The particulate matter entering the first flue gas branch pipe 51 enters the first purification structure 52 under the action of the second fan 53. The particulate matter adsorption device in the first purification structure 52, such as an electrostatic field, adsorbs the particulate matter in the flue gas, thereby purifying the discharged flue gas.

[0054] It should be noted that the diameter of the first flue gas branch pipe 51 is relatively small, and the airflow of the second fan 53 is several times smaller than that of the first fan 20. The second fan 53 is mainly used to maintain airflow within the first purification structure 52, thereby ensuring that the particles deflected by the magnetic field can enter the first purification structure 52. With both the diameter of the first flue gas branch pipe 51 and the airflow velocity of the second fan 53 being relatively small, a small flue gas purification component, such as a small electric field, can be installed in the first purification structure 52 to collect the particles that have been focused and entered the first flue gas branch pipe 51.

[0055] Specifically, in one embodiment of the present invention, the first flue gas branch pipe 51 includes a reducing portion 511 and a connecting portion 512, referring to... Figure 1 The connecting part 512 is a pipe of equal diameter, and one end of the connecting part 512 is connected to the reducing part 511, while the other end of the connecting part 512 is connected to the air inlet of the first purification structure 52. The first end 5111 of the reducing part 511 is connected to the main flue gas pipe 10, and the second end 5112 of the reducing part 511 is connected to the connecting part 512, and the cross-sectional area of ​​the first end 5111 is much larger than the cross-sectional area of ​​the second end 5112.

[0056] Combination Figure 1 and Figure 2 In one embodiment of the present invention, the first end 5111 of the variable diameter section 511 is disposed on the side of the magnetic field, and the first end 5111 has sufficient width in the left and right directions, so that particles carrying different numbers of electrons and with different masses can all fall into the variable diameter section 511, thereby allowing the charged particles to enter the first purification structure 52 under the action of the second fan 53.

[0057] Of course, similar applications exist in the prior art that use magnetic fields to deflect charged particles. For example, application CN103949344B discloses a magnetic deflection high-voltage pulse dust collector. This application uses a magnetic field within an electric field, allowing charged particles in high-speed airflow to be adsorbed by electrodes under the combined action of electric force and Lorentz force, thus significantly increasing the adsorption capacity of the dust collector for oil fume particles. Alternatively, application CN208170485U discloses a magnetic field-enhanced commercial electrostatic kitchen fume purification device. This device also uses both electric and magnetic fields to act on charged particles simultaneously, greatly increasing the adsorption performance of the purification device for particles.

[0058] However, it should be noted that in similar devices or equipment that deflect charged particles using a magnetic field, the magnetic field and electric field work together synchronously to allow the charged particles to be adsorbed onto the electrode plate.

[0059] The operating conditions described in this application differ from those in the aforementioned application documents. Note the high-volume operating conditions already mentioned. High air volume means a larger diameter main flue gas duct. In this case, if a large electrostatic field is directly installed in the large-diameter main flue gas duct, the energy required to maintain the large electrostatic field would be extremely high.

[0060] Alternatively, the diameter of the main flue gas duct can be reduced, causing the flue gas to converge into a smaller-diameter duct. A small electrostatic field can then be installed on this smaller duct to treat the flue gas, requiring relatively low energy to maintain. Simultaneously, to cope with the increased wind speed, a strong magnetic field can be placed at the small electrostatic field, enabling it to effectively adsorb particulate matter from high-speed winds.

[0061] However, in actual high-flow-rate flue gas environments, the ratio of the inlet area of ​​the main flue gas pipe to the inlet area of ​​the electrostatic field in the first purification structure differs significantly; that is, the cross-sectional area between the connection points of the main flue gas pipe and the first flue gas branch pipe differs greatly. Figure 1 As shown, the ratio of the cross-sectional area of ​​the main flue pipe to that of the first flue pipe is close to 10.

[0062] If the diameter of the main flue gas duct is directly reduced to a size suitable for the inlet area of ​​the electrostatic field in the first purification structure, the wind speed of the main flue gas duct after the diameter change needs to be maintained at 10 times the original while keeping the total processing air volume unchanged. At this time, the wind resistance in the main flue gas duct after the diameter change is extremely large, which means that maintaining this wind speed requires additional energy. That is, the power of the first fan needs to be increased by much more than 10 times (such as 40 or even 50 times) to maintain this wind speed, and the overall energy consumption of the equipment will increase greatly.

[0063] For example, let's set the required air volume to be 100m³. 3 The main flue gas duct is 5*5m in diameter, with a wind speed of 4m / s. The inlet size of the first purification structure is 0.5*0.5m. With the required air volume remaining constant, when the diameter of the main flue gas duct changes to 0.5*0.5m, the wind speed needs to be maintained at 400m / s. At this point, the flue gas needs to overcome enormous resistance as it runs through the main flue gas duct, especially when it passes through the obstruction of the first purification structure. This means that the power required by the first fan is far more than 10 times that of the original. For example, if a 16kW fan could meet the demand, now a 300kW or even 500kW fan is required to complete the operation. The entire system consumes a huge amount of energy.

[0064] Therefore, when dealing with large volumes of flue gas containing only a small amount of particulate matter, it is not suitable to directly reduce the diameter of the main flue gas pipe.

[0065] Furthermore, in one embodiment of the present invention, the cross-sectional area of ​​the second end 5112 is much smaller than the cross-sectional area of ​​the main flue gas pipe 10. (Refer to...) Figure 2 Charged particles move forward under the influence of the Lorentz force, thus entering the variable diameter section 511. The airflow in the first flue gas branch pipe 51 is controlled by the second fan 53, meaning that the flue gas velocity in the first flue gas branch pipe 51 is independent of the airflow in the main flue gas branch pipe.

[0066] That is, after the charged particles are focused by the magnetic field, the flue gas treatment volume changes from a large flow rate in the main flue gas pipe 10 to a small flow rate in the first flue gas branch pipe 51. The small flow rate of flue gas in the first flue gas branch pipe 51 can be treated by the small electrostatic field in the first purification structure 52.

[0067] By using a magnetic field in conjunction with the first purification structure 52, the energy consumption required by the first fan 20 remains constant, and the energy consumption required by the small electrostatic field and the second fan 53 is much less than the energy consumption required to maintain the large electrostatic field, thereby greatly reducing the overall energy consumption of the device.

[0068] In one embodiment of the present invention, such as Figure 2 As shown, the magnetic field lines extend from bottom to top. With the direction of electron movement toward the magnetic field lines determined, the direction of the Lorentz force on the particulate matter is determined according to the left-hand rule. Thus, it can be determined that the end connecting the first flue gas branch pipe 51 and the main flue gas pipe 10 is located on the front side of the main flue gas pipe 10.

[0069] Of course, in another embodiment of the present invention, when the direction of the magnetic field lines extends from top to bottom, the direction of the Lorentz force on the particulate matter is determined according to the left-hand rule, and then it can be determined that the end connecting the first flue gas branch pipe 51 and the main flue gas pipe 10 is located on the rear side of the main flue gas pipe 10.

[0070] In one embodiment of the present invention, in order to facilitate the calculation of the width of the first end 5111 of the variable diameter section 511, that is, the distance the particle moves to the left when it reaches the first end 5111 under the deflection of the electric field, the magnetic field is usually set to a uniform magnetic field. Therefore, in one embodiment of the present invention, the magnetic element 40 can be a current-carrying solenoid, a permanent magnet, or a parallel current-carrying coil.

[0071] Of course, a non-uniform magnetic field can also be used. When setting a non-uniform magnetic field, it is necessary to determine the reasonable width of the first end 5111 in the left and right directions through experiments, so as to ensure that all charged particles can pass through the first end 5111 and enter the first flue gas branch pipe 51.

[0072] Reference Figure 3 and Figure 4 In one embodiment of the present invention, the first purification structure 52 includes a housing 521, as shown in the figure. Figure 5The casing 521 contains a first electrostatic field 522 and a second electrostatic field 523. A distribution box 524 is installed on the side of the casing 521, and a handle 525 is provided between the side plate of the casing 521 and the frame of the casing 521 where the distribution box 524 is installed. By turning the handle 525, the side plate can be opened, thereby cleaning or maintaining the first electrostatic field 522 and the second electrostatic field 523 installed inside the casing 521.

[0073] like Figure 5 As shown, the first electrostatic field 522 is a cylindrical electrostatic field, the second electrostatic field 523 is a plate electrostatic field, and the first electrostatic field 522 is located upstream of the second electrostatic field 523.

[0074] The cylindrical electrostatic field has a large diameter cylinder, providing a large dust collection area for the anode, thus enabling preliminary treatment of the flue gas carrying particulate matter. The remaining particulate matter then enters the plate electrostatic field. In the plate electrostatic field, the distance between the cathode and anode plates is smaller than the distance between the cathode needle and the cylinder wall, resulting in higher dust removal efficiency. After passing through the plate electrostatic field, the particulate matter in the flue gas is essentially adsorbed, and the purified flue gas then enters the main flue gas pipe 10 through the second flue gas pipe.

[0075] Of course, in one embodiment of the present invention, in order to make the gas discharged from the first fan 20 cleaner, a second purification structure 60 is also installed on the main flue gas pipe 10. The second purification structure 60 is located between the second flue gas branch pipe 54 and the first fan 20.

[0076] In one embodiment of the present invention, the second purification structure 60 can be made of activated carbon. After being treated by the first purification structure 52 and the second purification structure 60, the flue gas discharged from the first fan 20 has good cleanliness.

[0077] Combination Figures 3-4 An air distribution plate 55 is installed at the air inlet of the first electrostatic field 522 inside the casing 521, and another air distribution plate 55 is installed at the air outlet 5212 of the second electrostatic field 523. When flue gas enters the first electrostatic field 522 from the first flue gas branch pipe 51, it first passes through the air distribution plate 55. Under the action of the air distribution plate 55, the flue gas enters the first electrostatic field 522 and the second electrostatic field 523 evenly. Furthermore, under the action of the air distribution plate 55 at the air outlet of the second electrostatic field 523, the gas in the second electrostatic field 523 will not be disturbed by the influence of the second fan 53, thus ensuring the purification efficiency of the second electrostatic field 523 for particulate matter in the flue gas.

[0078] More specifically, refer to Figures 5-7 As can be seen from the content, both the top and bottom of the first electrostatic field 522 and the second electrostatic field 523 are provided with connecting plates 5213, as shown in the reference. Figure 5 and Figure 6 The top of the first electrostatic field 522 is provided with two connecting plates 5213, and a groove adapted to the top and sides of the first electrostatic field 522 is formed between the two connecting plates 5213. (Refer to...) Figure 8 The bottom of the first electrostatic field 522 is also provided with two connecting plates 5213, and the two connecting plates 5213 are surrounded by a groove that is adapted to the bottom and side of the first electrostatic field 522.

[0079] Reference Figure 5 and Figure 6 The top of the second electrostatic field 523 is provided with two connecting plates 5213, and a groove adapted to the top and sides of the second electrostatic field 523 is formed between the two connecting plates 5213. (Refer to...) Figure 9 The bottom of the second electrostatic field 523 is also provided with two connecting plates 5213, and the two connecting plates 5213 are surrounded by a groove that is adapted to the bottom and side of the second electrostatic field 523.

[0080] Of course, the connecting plate 5213 is bent at a 90° angle at the fixed connection position of the housing 521, so that the connecting plate 5213 can be easily welded to the inner wall of the housing 521. Similarly, at the contact point between the connecting plate 5213 and the first electrostatic field 522 or the second electrostatic field 523, it is also bent at a right angle to form an "L"-shaped support plate, so as to support or limit the first electrostatic field 522 or the second electrostatic field 523.

[0081] Furthermore, a sealing strip 5214 is provided on the contact surface between the first electrostatic field 522 and the connecting plate 5213, and a sealing strip 5214 is similarly provided on the contact surface between the second electrostatic field 523 and the connecting plate 5213. (Refer to...) Figure 8 or Figure 9 The sealing strip 5214 is located on the connecting plate 5213 below the electrostatic field.

[0082] Reference Figure 7 The connection plates 5213 above and below the electrostatic field and the housing 521 are sealed together. Figure 5 and Figure 6 It can be seen that under the sealed cavity of the connecting plate 5213 and the profile, the flue gas can only flow to the second electrostatic field 523 through the cylinder in the first electrostatic field 522. Similarly, the flue gas can only flow to the outside of the housing 521 through the gap between the adjacent plates in the second electrostatic field 523.

[0083] Reference Figure 8Below the first electrostatic field 522 and the second electrostatic field 523, a drain trough 5215 is also provided. After a certain amount of particulate matter is adsorbed in the first electrostatic field 522 and the second electrostatic field 523, the particulate matter can fall into the drain trough 5215. At the same time, when cleaning the first electrostatic field 522 and the second electrostatic field 523, the wastewater after cleaning can be discharged to the outside of the casing 521 through the drain trough 5215.

[0084] The present invention also discloses a flue gas treatment system, which includes the above-mentioned magnetic focusing flue gas purification device and possesses all the advantages of the magnetic focusing flue gas purification device.

[0085] It is understood that those skilled in the art can make equivalent substitutions or changes to the technical solution and inventive concept of the present invention, and all such changes or substitutions should fall within the protection scope of the present invention.

Claims

1. A magnetic focusing type flue gas cleaning device, characterized by, include: The main flue gas pipe is used to collect flue gas. The first fan is installed at the end of the main flue gas duct; An electrifying structure is installed upstream of the main flue gas pipe, and the electrifying structure is used to charge the particulate matter in the flue gas. A magnetic element is located downstream of the electrified structure. The magnetic element is used to generate a magnetic field, which is used to deflect and gather charged particles in the flue gas. A purification unit for purifying charged particulate matter, the purification unit comprising: The first flue gas branch pipe is connected at one end to the main flue gas pipe and is used to guide the particulate matter deflected by the magnetic field. The first purification structure is connected to the other end of the first flue gas branch pipe and is used to adsorb particulate matter deflected by the magnetic field. The second fan is installed at the air outlet of the first purification structure; The second flue gas branch pipe has one end connected to the outlet end of the second fan, and the other end connected to the downstream of the main flue gas pipe. The first purification structure includes a housing, a first electrostatic field, and a second electrostatic field, both of which are installed inside the housing. The first flue gas branch pipe includes a variable diameter section and a connecting section. The connecting section is a constant diameter pipe. One end of the connecting section is connected to the variable diameter section, and the other end of the connecting section is connected to the air inlet of the housing. The first end of the variable diameter section is connected to the main flue gas pipe, and the second end of the variable diameter section is connected to the connecting section. The cross-sectional area of ​​the first end is much larger than the cross-sectional area of ​​the second end, and the cross-sectional area of ​​the variable diameter section gradually decreases from the first end to the second end. The cross-sectional area of ​​the second end is much smaller than the cross-sectional area of ​​the main flue gas pipe.

2. The magnetic focus type flue gas cleaning device according to claim 1, characterized by The first electrostatic field is a cylindrical electrostatic field, and the second electrostatic field is a plate electrostatic field. The first electrostatic field is located upstream of the second electrostatic field.

3. The magnetic focus type flue gas cleaning device according to claim 1 or 2, characterized by Both the air inlet and outlet of the casing are equipped with air distribution plates.

4. The magnetic focus type flue gas cleaning device according to claim 1, characterized by The magnetic focusing flue gas purification device also includes a second purification structure, which is installed on the main flue gas pipe and located between the second flue gas branch pipe and the first fan.

5. The magnetic focus type flue gas cleaning device according to claim 1, characterized by The electrified structure is an electrostatic field.

6. The magnetic focus type flue gas cleaning device according to claim 1, characterized by The magnetic field is a uniform magnetic field, and the magnetic element is one of a energized solenoid, a permanent magnet, or a parallel current-carrying coil.

7. A flue gas treatment system, characterized in that Includes the magnetic focusing flue gas purification device as described in any one of claims 1-6.

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