Tube sheet structure aerosol charging device

Abstract

The application discloses a kind of pipe plate structure aerosol electric charging device, including variable diameter metal pipe, insulating box, variable diameter pipe, variable diameter metal pipe is the variable diameter structure of thick lower thin, the outer wall of thin end of variable diameter metal pipe is equipped with the insulating object of cylindrical shape, and the opening of lower end of variable diameter metal pipe is provided with pipe discharge electrode. Insulating box is cylindrical, including upper insulating plate, insulating ring, lower insulating plate, the top surface of insulating ring is connected with the bottom surface of upper insulating plate, and the bottom surface of insulating ring is connected with the top surface of lower insulating plate. The center of upper insulating plate is provided with inlet, and the lower end of variable diameter metal pipe is located in the inner cavity of insulating box by penetrating inlet, and variable diameter metal pipe is coaxially installed with upper insulating plate by insulating object. The top surface of lower insulating plate is provided with flat plate electrode at the center, and a plurality of round hole outlets are evenly provided along the circumferential direction of flat plate electrode. Variable diameter pipe is circumferentially connected with the bottom edge of lower insulating plate. The device uses pipe plate structure, utilizes the edge of pipe and negative plate to generate gas discharge, and improves the charging efficiency.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of aerosol charging, in particular to a tube-plate structure aerosol charging device. BACKGROUND

[0002] For aerosol collection and measurement methods based on electrical principles, the premise of accurate and reliable collection and measurement of aerosols is that aerosol particles can be stably and efficiently charged. The existing charging methods of aerosols mainly include indirect charging and direct charging methods using corona discharge, and the structures mainly include needle-plate structure and wire cylinder structure. Whether it is a needle-plate structure or a wire cylinder structure charger, the charging efficiency of nanometer aerosol particles that can be achieved by the existing method is generally low, generally less than 40%. The fundamental way to improve the charging efficiency of nanometer aerosol particles is to increase the ion concentration mixed with aerosol particles and reduce the loss of nanometer particles in the charging device. The reason for the low charging efficiency of nanometer particles in the traditional corona charging technology is that in the indirect charging technology, there is a lot of loss in the process of ion transport from the discharge zone to the charging zone, so that it is difficult to obtain a high ion concentration in the charging zone; in the direct charging technology, the ion migration zone cannot cover the entire cross section of the aerosol particle flow, so that there is a large proportion of charging blind area. Therefore, in order to solve the above problems, a tube-plate structure aerosol charging device is proposed. SUMMARY

[0003] The technical problem to be solved by the present application is to overcome the shortcomings of the prior art and provide a tube-plate structure aerosol charging device which uses a tube-plate structure to improve the charging efficiency by causing gas discharge between the edge of the tube and the negative plate.

[0004] To solve the above technical problems, the basic idea of the technical solution adopted by the present application is:

[0005] A tube-plate structure aerosol charging device, comprising a variable-diameter metal tube, an insulating box, and a variable-diameter tube, the variable-diameter metal tube has a variable-diameter structure with a thick upper part and a thin lower part, a cylindrical insulating object is installed on the outer wall of the thin end of the variable-diameter metal tube, and a tube discharge electrode is arranged at the opening of the lower end of the variable-diameter metal tube. The insulating box is cylindrical and comprises an upper insulating plate, an insulating ring, and a lower insulating plate. The top surface of the insulating ring is connected to the bottom surface of the upper insulating plate, and the bottom surface of the insulating ring is connected to the top surface of the lower insulating plate. A circular hole-shaped inlet is formed in the center of the upper insulating plate, the lower end of the variable-diameter metal tube penetrates the upper insulating plate through the inlet and is located in the inner cavity of the insulating box, and the variable-diameter metal tube is coaxially installed with the upper insulating plate through the insulating object, with the bottom surface of the insulating object connected to the top surface of the upper insulating plate. A flat plate electrode is arranged at the center of the top surface of the lower insulating plate, and a plurality of circular hole outlets are uniformly formed in the lower insulating plate along the circumference of the flat plate electrode. The thick end of the variable-diameter tube is connected to the edge of the bottom surface of the lower insulating plate in a circumferential manner.

[0006] Further, the insulating material, the upper insulating plate, the insulating ring and the lower insulating plate are made of polytetrafluoroethylene.

[0007] Compared with the prior art, the application has the following beneficial effects.

[0008] The aerosol charging device with the tube-plate structure not only has a large ion concentration in the traditional direct charging technology, but also effectively avoids the charging blind area existing in the traditional corona discharge structure.

[0009] The specific embodiments of the application will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0010] The accompanying drawings, which are part of the present application, serve to provide a further understanding of the application, and the illustrative embodiments of the application and their description serve to explain the application without constituting an improper limitation of the application. Obviously, the accompanying drawings described below are only some embodiments, and other drawings can be obtained by those skilled in the art without creative labor. In the drawings:

[0011] Figure 1 is a structural schematic diagram of the application;

[0012] Figure 2 is a sectional view of the application;

[0013] Figure 3 is a structural schematic diagram of the lower insulating plate of the application.

[0014] In the drawings: 1, variable diameter metal tube; 2, insulating material; 3, tube discharge electrode; 4, upper insulating plate; 5, variable diameter tube; 6, flat plate electrode; 7, insulating ring; 8, lower insulating plate.

[0015] It should be noted that these drawings and written descriptions are not intended to limit the scope of the concept of the application in any way, but to illustrate the concept of the application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical scheme and advantages of the embodiments of the application more clear, the technical scheme in the embodiments will be clearly and completely described below with reference to the drawings of the embodiments of the application. The following embodiments are used to illustrate the application, but not to limit the scope of the application.

[0017] In the description of this invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0018] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0019] Example 1

[0020] like Figures 1-3 As shown in the figure, the tube-plate structure aerosol charging device described in this embodiment includes a variable-diameter metal tube 1, an insulating box, and a variable-diameter tube 5. The variable-diameter metal tube 1 has a variable-diameter structure that is thicker at the top and thinner at the bottom. The variable-diameter metal tube 1 is vertically arranged. A cylindrical insulating material 2 is sleeved on the outer wall of the middle part of the thinner end of the variable-diameter metal tube 1. The insulating material 2 is made of polytetrafluoroethylene. A tube discharge electrode 3 is provided at the lower opening of the variable-diameter metal tube 1. See attached figure. Figure 2 As shown. The insulating box is cylindrical with an internal cavity, including an upper insulating plate 4, an insulating ring 7, and a lower insulating plate 8. All three components are made of polytetrafluoroethylene (PTFE). The top surface of the insulating ring 7 is circumferentially connected to the bottom edge of the upper insulating plate 4, and the bottom surface of the insulating ring 7 is circumferentially connected to the top edge of the lower insulating plate 8. See attached diagram. Figure 1 , 2 As shown. A circular inlet is formed at the center of the upper insulating plate 4. The diameter of the inlet is larger than the diameter of the narrow end of the variable-diameter metal tube 1 but smaller than the diameter of the insulator 2. The lower end of the variable-diameter metal tube 1 passes through the inlet and penetrates the upper insulating plate 4, residing within the inner cavity of the insulating box; that is, the tube discharge electrode 3 is located within the inner cavity of the insulating box. The variable-diameter metal tube 1 is coaxially mounted to the upper insulating plate 4 via the insulator 2. The bottom surface of the insulator 2 is bonded to the top surface of the upper insulating plate 4 with adhesive. See Appendix. Figure 1 , 2 As shown. A flat plate electrode 6 is disposed at the center of the top surface of the lower insulating plate 8 corresponding to the tube discharge electrode 3. The flat plate electrode 6 is a copper film deposited on the PCB board. Several circular holes are evenly distributed around the flat plate electrode 6 on the lower insulating plate 8. (See attached diagram.) Figure 3As shown. The reducer 5 is a copper tube, welded to the bottom of the lower insulating plate 8, meaning the thicker end of the reducer 5 is circumferentially connected to the bottom edge of the lower insulating plate 8. See attached diagram. Figure 1 , 2 As shown.

[0021] This device relies on the self-sustaining discharge between the edge of the variable diameter metal tube 1 and the plate electrode 6. As the aerosol particles flow out of the variable diameter metal tube 1, they will all pass through the ion migration region. This ensures a large ion concentration between the tube and the plate, similar to that in traditional direct charging technology, while avoiding the charging dead zone that exists when using traditional corona discharge structures. During operation, a high-voltage direct current is applied between the tube discharge electrode 3 and the plate electrode 6. When the voltage reaches the breakdown voltage, a gas discharge occurs between the edge of the tube discharge electrode 3 and the plate electrode 6. The gas ions generated by the discharge migrate from the edge of the tube electrode to the plate electrode 6, filling the space between the edge of the tube discharge electrode 3 and the plate electrode 6 with gas ions. When the aerosol flow enters from the aerosol inlet, it mixes with the gas ions as it passes through the discharge gap. The aerosol particles are charged through diffusion-charged aerosol particles. Since all aerosol particles entering the charger flow through the gas ion migration region, the charging dead zone of the traditional needle-plate structure charger is avoided. Therefore, the tube-plate structure charger can significantly improve the charging efficiency of aerosol particles.

[0022] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A tube plate structure aerosol charging device, characterized by: Including reducing metal pipe (1), insulating box, copper pipe material reducing pipe (5), the reducing metal pipe (1) is the reducing structure of thick top thin bottom, reducing metal pipe (1) vertical setting, the outer wall of the middle part of the thin end of reducing metal pipe (1) is equipped with the cylindrical insulation (2) of installation, the insulation (2) adopts polytetrafluoroethylene material, the lower end opening of reducing metal pipe (1) is provided with pipe discharge electrode (3), the insulating box is the cylindrical of being provided with inner cavity in the inside, including upper insulating plate (4), insulating ring (7), lower insulating plate (8), upper insulating plate (4), insulating ring (7), lower insulating plate (8) all adopt polytetrafluoroethylene material, the top surface of insulating ring (7) and the bottom surface edge of upper insulating plate (4) circumferential connection, the bottom surface of insulating ring (7) and the top surface edge of lower insulating plate (8) circumferential connection, the center of upper insulating plate (4) is provided with the circular hole-shaped import, the diameter of import is greater than the diameter of the thin end of reducing metal pipe (1) and less than the diameter of insulation (2), the lower end of reducing metal pipe (1) is through import and is located in the inner cavity of the insulating box of upper insulating plate (4), reducing metal pipe (1) is coaxially installed with upper insulating plate (4) through the insulation (2), the bottom surface of insulation (2) and the top surface of upper insulating plate (4) are connected by adhesive, the top surface center of lower insulating plate (8) is provided with flat electrode (6) corresponding to pipe discharge electrode (3), flat electrode (6) is the copper film deposited on the PCB board, lower insulating plate (8) is evenly provided with a plurality of circular hole outlets along the circumferential direction of flat electrode (6), the thick end of reducing pipe (5) and the bottom edge of lower insulating plate (8) circumferential connection.

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