Flue gas electrostatic trap
Through the three-stage structure of front, middle and rear electrodes and the insulated casing design, the problem of electrode attachments in the flue gas electrostatic trap affecting the accuracy of the test is solved, and the electrodes are quickly cleaned and replaced in shape, improving the reliability and efficiency of the test.
Patent Information
- Application Number
- CN202421747293.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-23
- Publication Date
- 2025-07-01
- Estimated Expiration
- 2034-07-23
AI Technical Summary
In existing flue gas electrostatic traps, particle phases are prone to adhere to the surface of the needle-shaped electrode, resulting in incomplete capture, affecting the accuracy of the test results, and the disassembly and assembly process is cumbersome, which can easily cause pollution and loss of trapped substances.
The front, middle and rear electrode structures are adopted, and the front section of the electrode can be detached and connected, combined with the insulating sleeve and sealing ring design, to achieve rapid replacement and cleaning, ensuring the accuracy of the test.
Without removing the internal structure of the flue gas electrostatic trap, the front section of the electrode is conveniently removed for cleaning, which improves the accuracy of the test, and analyzes the relationship between the electrode shape and the capture efficiency through shape replacement.
Smart Images
Figure CN223042884U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of cigarette smoke capture, in particular to a smoke electrostatic precipitator. Background Technique
[0002] With the enhancement of people's health awareness, the impact of smoking on health has received wide attention. Especially, the components of the smoke directly inhaled by the human body are extremely complex, and the requirements for the detection and analysis of various components contained therein are also getting higher and higher. Smoke capture is a key step in smoke analysis, and its efficiency and accuracy directly affect the analysis results.
[0003] Cigarette smoke is mainly divided into two parts: mainstream smoke and sidestream smoke. Mainstream smoke refers to the smoke escaping from the end of the cigarette butt. Its capture often uses Cambridge filter pads and smoke electrostatic precipitators. Although Cambridge filter pads have high capture efficiency and good repeatability, a large amount of inorganic components contained in the filter pads increase the analysis difficulty. The smoke electrostatic precipitator has obvious advantages especially in detecting extremely trace heavy metal substances in smoke due to its low background and little pollution to the smoke.
[0004] The working principle of the smoke electrostatic precipitator is to connect a capture tube in series in the cigarette suction system. A needle-shaped electrode is placed in the center of the tube, and a DC high voltage is provided by an external high-voltage power supply to form a high-voltage electrostatic field, so that the particulate matter in the smoke is captured by the electric field force on the inner wall of the capture tube. However, the current smoke electrostatic precipitator has the following problems:
[0005] During the capture process, the outer surface of the needle-shaped electrode is prone to attach particulate matter, resulting in incomplete collection and affecting the accuracy of the test results. At present, the disassembly and assembly process of the needle-shaped electrode of the smoke electrostatic precipitator is extremely cumbersome, and it is extremely easy to cause pollution and loss of the captured substances during the operation process, which seriously affects the operation experience of the users and the reliability of the analysis results. In addition, according to the relationship between the charge distribution and the surface curvature of the electrode and the relevant principles of the electrostatic field, the electric field intensity of the needle-shaped electrode is concentrated around the tip with the largest curvature, resulting in uneven capture. Content of the Utility Model
[0006] The purpose of the utility model is to provide a smoke electrostatic precipitator to solve the problems put forward in the above background technique.
[0007] To achieve the above purpose, the utility model provides the following solution:
[0008] A smoke electrostatic precipitator includes a housing, a rear cover, a protective cover, a capture tube, an electrode and a suction port. One end face of the housing is connected to the rear cover, the other end face of the housing is provided with a protective cover and a capture tube, the suction port is installed on the top surface of the housing, and the electrode passes through the rear cover and enters the interior of the housing and extends to the center of the capture tube; the electrode includes an electrode front section, an electrode middle section and an electrode rear section which are detachably connected in sequence, and an insulating sleeve is sleeved outside the electrode.
[0009] In a feasible implementation, the protective cover is arranged outside the collection pipe.
[0010] In a feasible implementation, the protective cover is provided with weight-reducing holes along its circumferential direction.
[0011] In a feasible implementation, the protective cover is threadedly connected to the housing.
[0012] In a feasible implementation, a sealing ring is provided between the outer wall of the collection pipe and the inner wall of the front end of the housing.
[0013] In a feasible implementation, the sealing ring is made of an elastic material.
[0014] In a feasible implementation, the sealing ring is an O-ring.
[0015] In a feasible implementation, a hose is connected to the outside of the front end of the collection pipe, and the hose is connected to a cigarette butt.
[0016] In a feasible implementation, the housing is bolted to the rear cover.
[0017] In a feasible implementation, the housing is a square frame structure with a rounded upper end.
[0018] In a feasible implementation, the rear cover is a shell cover that is hollow inside and open at both ends, and a fixing clip is installed at the edge of the rear end opening to clamp the electrode.
[0019] In a feasible implementation, the fixing clip is a cable fixing clip.
[0020] In a feasible implementation, a horizontal through hole and a vertical through hole communicating with the horizontal through hole are provided on the housing, the electrode passes through the horizontal through hole, and the vertical through hole communicates with the suction port.
[0021] In a feasible implementation, the front section of the electrode is threadedly connected to the middle section of the electrode, and a mutually matching jack and plug are provided at the connection end of the middle section and the rear section of the electrode.
[0022] In a feasible implementation, a high-voltage cable is fixedly inserted into the plug.
[0023] In a feasible implementation, a sealing ring is provided outside the middle section of the electrode.
[0024] In a feasible implementation, an annular positioning boss and a sealing ring are provided on the outer wall of the insulating sleeve.
[0025] In a feasible implementation, a fastening through hole is provided on the housing, and a fastener passes through the fastening through hole to fasten the housing and the insulating sleeve.
[0026] In a feasible implementation, the fastener is a fastening screw.
[0027] Compared with the prior art, the beneficial effects of the present utility model are as follows:
[0028] The present utility model provides a flue gas electrostatic precipitator. By setting the electrode into a front, middle, and rear three-section structure, firstly, without disassembling the internal structure of the flue gas electrostatic precipitator, the front section of the electrode can be conveniently removed, and the particulate matter attached thereto can be completely collected by using a chemical solvent to ensure the test accuracy; secondly, by replacing the front section of the electrode with different shapes, it becomes a platform for analyzing the relationship between the electrode shape and the electrostatic precipitation efficiency. Description of the Drawings
[0029] Figure 1 is a schematic structural diagram of the flue gas electrostatic precipitator according to an embodiment of the present utility model;
[0030] Figure 2 is a cross-sectional view of the flue gas electrostatic precipitator according to an embodiment of the present utility model;
[0031] Figure 3 is a schematic structural diagram of the electrode according to an embodiment of the present utility model;
[0032] In the figure, 1 - housing, 2 - rear cover, 3 - protective cover, 4 - collection tube, 5 - electrode, 6 - suction port, 21 - fixing clip, 31 - weight reduction hole, 51 - front section of the electrode, 52 - middle section of the electrode, 53 - rear section of the electrode, 54 - insulating sleeve. Detailed Embodiments
[0033] In order to make the technical problems, technical solutions, and beneficial effects to be solved by the present utility model clearer, the present utility model will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.
[0034] In this application, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, or a communication connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.
[0035] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the indicated position or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.
[0036] Embodiment 1
[0037] Refer to Figure 1 , this embodiment discloses a flue gas electrostatic precipitator, which includes a housing 1, a rear cover 2, a protective cover 3, a collecting tube 4, an electrode 5, and a suction port 6. The housing 1 is a square frame structure with a rounded upper end processed from an entire aluminum block, which is used to fix other components on the flue gas electrostatic precipitator and ensure the overall structure is stable and reliable. The protective cover 3 and the collecting tube 4 are installed at the front end of the housing 1. The protective cover 3 covers the outside of the collecting tube 4 and provides a physical barrier and mechanical protection for it. A plurality of weight reduction holes 31 are provided along the circumferential direction of the protective cover 3, which can not only reduce the overall mass but also serve as an observation window to view the electrostatic precipitation process in real time. The rear end of the housing 1 is connected to the rear cover 2. The electrode 5 passes through the rear cover 2 and enters the interior of the housing 1 and extends to the center of the collecting tube 4. The suction port 6 is installed on the top surface of the housing 1.
[0038] Refer to Figure 2 , a horizontally penetrating horizontal through-hole is provided on the housing 1. The horizontal through-hole extends from the front end face of the housing 1 to the rear end face of the housing 1. A vertical through-hole is provided from the top to the bottom of the housing 1, and the vertical through-hole is communicated with the horizontal through-hole. On the one hand, the horizontal through-hole is used to install and position the electrode 5, and on the other hand, it also serves as a passage for the mainstream cigarette smoke to flow through. The vertical through-hole is used to install the suction port 6, and its interior is processed with threads. What is shown in this embodiment is the screwed-in state of the quick connector. The staff can connect other types of pipe connectors according to the actual situation of the connecting pipeline, such as a taper pipe joint, etc.
[0039] In this embodiment, the protective cover 3 is processed into a tubular shape from an aluminum material and is threadedly connected to the front end face of the housing 1. Its length can cover the collecting tube 4 and provide mechanical protection for it. With such a structure, it can be disassembled and assembled quickly, and the electrical connection between the protective cover 3 and the housing 1 can also be realized. It not only improves the assembly efficiency but also ensures the grounding reliability.
[0040] The collecting tube 4 is processed into a tubular shape by pure quartz glass. In this embodiment, the rear end outer wall of the collecting tube 4 is sealed and connected to the front end inner wall of the shell 1 by an O-ring. The O-ring is made of elastic material, and the front end is closed to a size convenient for connecting a hose. The inner and outer diameters of the hose are 6×10 mm. In the specific implementation process, a hose is used to connect the front end of the collecting tube 4 and the cigarette butt at the end of the cigarette, and an air pipe is used to connect the suction system (such as a smoking machine) and the suction port 6 of the smoke electrostatic collector.
[0041] The outer dimensions of the rear cover 2 are exactly the same as those of the shell 1, and it is connected to the rear end face of the shell 1 by bolts; the rear cover 2 is a shell cover which is hollow inside and open at both ends, and its rear end is open and installed with a fixing clamp 21, and a cable fixing clamp is selected in this embodiment; the electrode 5 is installed from the rear end opening of the rear cover 2, and is finally clamped and locked by the cable fixing clamp.
[0042] See also Figure 3 The electrode 5 includes an electrode front section 51, an insulating sleeve 54, an electrode middle section 52 and an electrode rear section 53. The electrode front section 51 is made of copper, the surface is gold-plated, and is processed into a needle shape. The electrode middle section 52 is made of copper, an O-ring is arranged on the outside, an internal threaded hole is arranged at one end, and a 4mm safety socket is processed at the other end; the front end of the electrode rear section 53 adopts a 4mm safety plug, and the high-voltage cable is plugged into the safety plug, which is wrapped with a polytetrafluoroethylene shell. In this embodiment, it also includes a lock of polytetrafluoroethylene material. The insulating sleeve 54 is processed into a tubular shape with polytetrafluoroethylene, and an annular positioning boss and an O-ring are arranged on the outer surface, and are sleeved on the electrode front section 51, the electrode middle section 52 and the electrode rear section 53, so as to ensure the axial positioning and sealing of the front, middle and rear three sections of the electrode 5 when assembled with the shell 1.
[0043] Specifically, the assembly process of the electrode 5 is as follows: the electrode middle section 52 is inserted from the rear end of the insulating sleeve 54, the interior is sealed using the O-ring on the electrode middle section 52, the rear end of the electrode front section 51 and the front end of the electrode middle section 52 are threadedly connected; the 4mm safety plug of the electrode rear section 53 is inserted from the rear end into the 4mm safety socket of the electrode middle section 52 and locked with a lock.
[0044] The electrode 5 is inserted into the horizontal through hole of the shell 1 and axially positioned by the internal boss. In this embodiment, a screw hole is provided on the top of the shell 1, and the shell 1 and the insulating sleeve 54 are tightened by screwing in the screw to ensure reliable positioning of the electrode 5.
[0045] The above structure achieves the purpose of quickly removing the electrode front section 51 to collect or replace the captured material without disassembling the internal structure of the flue gas electrostatic collector.
[0046] It should be noted that the sizes and shapes of the front electrode section 51 and the trapping tube 4 shown in the embodiments are not unique, and analysts in the relevant field can easily think of making arbitrary changes to the sizes and shapes of the front electrode section 51 and the trapping tube 4 during the analysis of how to improve the electrostatic trapping efficiency.
[0047] The working principle of this embodiment is as follows: Connect the dry and clean trapping tube 4 and the protective cover 3 to the housing 1, and connect the suction pipeline as described above; Connect the electrode 5 to the high-voltage power supply and turn on the output to form a stable electrostatic field in the trapping tube 4 with the front electrode section 51; Start the suction system for suction; After the suction process is completed, disconnect the high-voltage power supply and remove the protective cover 3, the trapping tube 4, and the front electrode section 51; Use relevant chemical analysis methods to collect and analyze the trapped substances.
[0048] In this embodiment, by setting the electrode 5 into a three-section structure of front, middle, and rear, first, without disassembling the internal structure of the flue gas electrostatic precipitator, the front electrode section 51 can be conveniently removed, and the particulate matter attached to it can be completely collected using a chemical solvent to ensure the test accuracy; Second, by replacing the front electrode section 51 with different shapes, it becomes a platform for analyzing the relationship between the shape of the electrode 5 and the electrostatic trapping efficiency.
[0049] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.
Claims
1. A flue gas electrostatic collector, characterized in that: It includes a shell, a rear cover, a protective cover, a collecting tube, an electrode and a suction port. One end face of the shell is connected to the rear cover, and the other end face of the shell is installed with the protective cover and the collecting tube. The top surface of the shell is installed with a suction port. The electrode passes through the rear cover into the shell and extends to the center of the collecting tube. The electrode includes an electrode front section, an electrode middle section and an electrode rear section which are detachably connected in sequence, and the outer layer of the electrode is provided with an insulating sleeve.
2. The flue gas electrostatic collector according to claim 1, characterized in that: The protective cover is arranged on the outer side of the collecting pipe.
3. The flue gas electrostatic collector according to claim 2, characterized in that: The protective cover is provided with weight-reducing holes along its circumference.
4. The flue gas electrostatic collector according to claim 1, characterized in that: The protective cover is connected to the housing through threads.
5. The flue gas electrostatic collector according to claim 1, characterized in that: A sealing ring is provided between the outer wall of the collecting pipe and the front inner wall of the shell.
6. The flue gas electrostatic collector according to claim 1, characterized in that: The shell body is connected to the rear cover via bolts.
7. The flue gas electrostatic collector according to claim 1, characterized in that: The rear cover is a shell with a hollow interior and openings at both ends, and a fixing clip is installed on the edge of the rear opening to clamp the electrode.
8. The flue gas electrostatic collector according to claim 1, characterized in that: The shell is provided with a horizontal through hole and a vertical through hole connected to the horizontal through hole, the electrode passes through the horizontal through hole, and the vertical through hole is connected to the suction port.
9. The flue gas electrostatic collector according to claim 1, characterized in that: The electrode front section is threadedly connected to the electrode middle section, and the connecting ends of the electrode middle section and the electrode rear section are provided with mutually matching jacks and plugs.
10. The flue gas electrostatic collector according to claim 1, characterized in that: An annular positioning boss and a sealing ring are arranged on the outer wall of the insulating sleeve.