Adjustable tubular ionization filter adaptive to tubular furnace and use method of adjustable tubular ionization filter

Abstract

The invention relates to an adjustable tubular ionization filter adaptive to a tubular furnace and a use method of the adjustable tubular ionization filter. The filter comprises a particle charger and a collector, the inlet end of the particle charger is hermetically connected with the outlet end of the tube furnace, the inlet end of the collector is hermetically connected with the outlet end of the particle charger, and the outlet end of the collector is hermetically connected with a monitoring instrument; shells of the particle charger and the particle collector are cylindrical shells made of insulating materials, and the inner diameters of the shells are matched with the inner diameter of the outlet end of the tubular furnace; a cathode plate and an anode plate are sequentially arranged in the particle charger in the air flowing direction, and a plurality of high-voltage plates and a plurality of reference plates are arranged in the collector at intervals in the direction parallel to the air flowing direction. The collecting plate capable of being directly cleaned is used, consumables are avoided, and the economical efficiency is good.

Description

Technical Field

[0001] The invention relates to the field of experimental research on urban solid waste heat treatment technology, and in particular to an adjustable tubular ionization filter adapted to a tubular furnace and a use method thereof. Background Art

[0002] With the deepening of urbanization, the output of solid waste has increased year by year. The principle of treating and disposing of solid waste mainly lies in harmlessness and resource utilization. Among them, thermal treatment has great advantages. Therefore, the use of tubular furnaces for solid waste heating simulation treatment experiments is also increasing day by day. However, how to filter the smoke released in the experiment to prevent damage to the monitoring equipment has become a major problem.

[0003] Most existing tubular furnace flue gas filtration methods use filter mesh filtration, and the filter element needs to be replaced regularly, otherwise the efficiency will decrease. As the use time increases, the air resistance will increase, and there may also be a risk of secondary pollution. Summary of the invention

[0004] In order to solve the problems existing in the above-mentioned prior art, the present invention provides an adjustable tubular ionization filter adapted to a tubular furnace, comprising a particle charger and a collector. The particle charger inlet end is used for sealingly connecting to the tubular furnace outlet end, the collector inlet end is used for sealingly connecting to the particle charger outlet end, and the collector outlet end is used for sealingly connecting to a monitoring instrument.

[0005] The shell of the particle charger and collector is a cylindrical shell made of insulating material, and the inner diameter is adapted to the inner diameter of the outlet end of the tube furnace, ensuring the same effective cross-sectional area to ensure the stability of air flow. The cathode plate and the anode plate are arranged in sequence in the particle charger along the direction of air flow, and several high-voltage plates and several reference plates are arranged in intervals in the collector along the parallel direction of air flow.

[0006] When in use, the tubular furnace, particle charger, collector and monitoring instrument are connected in sequence. An ionization section is formed between the cathode plate and the anode plate in the particle charger. When the flue gas generated by heating in the tubular furnace passes through the particle charger, the flue gas particles are charged due to air ionization in the ionization section, and then sent to the subsequent collector. Since the particles are charged, the particles are adsorbed between the high-voltage plate and the reference plate under the action of gravity. The air with adsorbed particles is sent to the subsequent monitoring instrument for corresponding analysis experiments. After the experiment, the collector can be removed to clean the adsorbed particles inside it for easy use next time.

[0007] Furthermore, it also includes a connector, which is provided with a tubular furnace interface and a first threaded port, the tubular furnace interface is used for detachably sealingly connecting the outlet end of the tubular furnace, the inlet end of the particle charger is provided with a second threaded port, and the first threaded port is used for detachably sealing the second threaded port.

[0008] Furthermore, a third threaded opening is provided at the outlet of the particle charger, and a fourth threaded opening is provided at the inlet of the collector, and the third threaded opening is used to detachably seal the fourth threaded opening. A sealing ring and a side sealing ring are also provided at the connection position between the first threaded opening and the second threaded opening and the connection position between the third threaded opening and the fourth threaded opening. A mounting ring is provided at the bottom of the inner thread of the corresponding threaded opening, and the outer diameter of the mounting ring is smaller than the inner diameter of the corresponding outer threaded opening. The sealing ring is arranged on the outside of the mounting ring, and is used to seal the mounting ring and the inner side of the corresponding outer threaded opening. The side sealing ring is arranged at the bottom of the inner thread of the corresponding threaded opening, and is used to seal the outer side of the top of the outer thread of the corresponding threaded opening and the bottom of the inner thread of the corresponding threaded opening. It can effectively prevent the leakage of toxic gases that may exist in the experiment and the experimental errors caused by the entry of indoor air into the monitoring instrument.

[0009] Furthermore, a conduit interface is provided at the collector outlet, and a bell-shaped transition section is also provided on the collector shell for transitionally connecting the conduit interface. The bell-shaped transition section stabilizes the gas flow process.

[0010] Furthermore, the housing of the particle charger is provided with a cathode plate interface and an anode plate interface, which are respectively used to electrically connect to the cathode plate and the anode plate, and are used to connect the cathode plate to high voltage and the anode plate to reference voltage. The housing of the collector is provided with a high-voltage board interface and a reference board interface, which are respectively used to electrically connect each high-voltage board and each reference board, and are used to connect the high-voltage board to high voltage and the reference board to reference voltage.

[0011] Furthermore, the cathode plate includes a plurality of cathode wires, each of which is distributed in a needle-shaped or tooth-shaped ring. The anode plate includes a plurality of anode wires, each of which is distributed in a grid-shaped manner.

[0012] Furthermore, it also includes a voltage regulating device and an overvoltage protector. The voltage regulating device is used to electrically connect the cathode plate interface, the anode plate interface, the high-voltage plate interface and the reference plate interface. The overvoltage protector is arranged at the output end of the voltage regulating device to limit the voltage output by the voltage regulating device.

[0013] Furthermore, the distance between adjacent high-voltage plates and reference plates can be adjusted, and the appropriate distance can be adjusted according to the size of the flue gas particles. Specifically, several high-voltage plates and reference plate assemblies or collectors with different distances can be selected, or a mechanism that can adjust the distance can be set. After installation, the minimum distance between the high-voltage plate and the reference plate and the anode plate is greater than 5mm.

[0014] The present invention also provides a method for using an adjustable tubular ionization filter adapted to a tubular furnace, which is used for the filter as described above, and comprises the following steps: S1. Connect the clean and dry collector to the particle charger; connect the monitoring instrument to the collector outlet; connect the collector to the tube furnace outlet.

[0015] S2. Check the air tightness. If the air tightness is good, remove the particle charger.

[0016] S3. Heat the tube furnace to a specified temperature, feed the experimental materials, connect the particle charger to the tube furnace, turn on the particle charger and collector, and conduct the experiment.

[0017] S4. After the experiment, disassemble, clean and dry the collector.

[0018] Furthermore, in S2, the particle charger and the collector are connected to a voltage regulating device, and the voltage connected to the particle charger and the collector is adjusted according to the filtering efficiency required by the experiment.

[0019] The particle charger and collector of the present invention adopt a tubular shell, so that the air flow path has the characteristics of unchanged effective cross-sectional area and no increase in volume, and the determination of the flow path becomes simple and easy, which reduces the possibility of air leakage and improves the collection efficiency.

[0020] The present invention uses a voltage regulating device, and the filtering efficiency can be adjusted by adjusting the voltage. A directly washable collecting plate, namely a high-voltage plate and a reference plate, is used, which has no consumables and good economic efficiency. The dust collection degree of the collecting plate can be used to roughly judge the amount of particles carried in the experiment, which is convenient for preliminary judgment of the rationality of the experiment. The electric power during the experiment is less than one watt, and it can be used by connecting to the mains, with good versatility and high energy utilization efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 is a schematic diagram of a filter of the present invention; Figure 2 is a cross-sectional view of a particle charger in the present invention; Figure 3 is a cross-sectional view of a collector in the present invention; Figure 4 It is a schematic diagram of the connection between the third threaded opening and the fourth threaded opening in the present invention; Figure 5 It is a schematic diagram of the installation of the sealing ring and the side sealing ring in the present invention; Figure 6 is a connection diagram of the voltage regulating device in the present invention; In the figure: 1. particle charger; 2. collector; 3. cathode plate; 4. anode plate; 5. high-voltage board; 6. reference board; 7. connector; 8. tube furnace interface; 9. first threaded port; 10. second threaded port; 11. third threaded port; 12. fourth threaded port; 13. sealing ring; 14. side sealing ring; 15. mounting ring; 16. catheter interface; 17. transition section; 18. cathode plate interface; 19. anode plate interface; 20. high-voltage board interface; 21. reference board interface; 22. cathode wire; 23. anode wire; 24. voltage regulating device. 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.

[0024] Embodiment 1:

[0025] See also Figure 1 This embodiment is an adjustable tubular ionization filter adapted to a tubular furnace, comprising a particle charger 1 and a collector 2. The inlet end of the particle charger 1 is used to seal and connect to the outlet end of the tubular furnace, the inlet end of the collector 2 is used to seal and connect to the outlet end of the particle charger 1, and the outlet end of the collector 2 is used to seal and connect to a monitoring instrument.

[0026] The shell of the particle charger 1 and collector 2 is a cylindrical shell made of insulating material, and the inner diameter is adapted to the inner diameter of the outlet end of the tube furnace, ensuring the same effective cross-sectional area to ensure the stability of air flow. The shell should be made of high temperature resistant material, and alumina ceramic is recommended. Figure 2 The particle charger 1 is provided with a cathode plate 3 and an anode plate 4 in sequence along the air flow direction, see Figure 3 A plurality of high-pressure plates 5 and a plurality of reference plates 6 are arranged in the collector 2 in a direction parallel to the air flow.

[0027] Preferably, a connector 7 is further included for connecting to the tubular furnace. The connector 7 is provided with a tubular furnace interface 8 and a first threaded port 9. The tubular furnace interface 8 is used for detachably sealingly connecting the outlet end of the tubular furnace. The specific connection form needs to be adapted to the tubular furnace. The inlet end of the particle charger 1 is provided with a second threaded port 10. The first threaded port 9 is used for detachably sealing the second threaded port 10.

[0028] See also Figure 4 In this embodiment, the outlet of the particle charger 1 is provided with a third threaded opening 11, and the inlet of the collector 2 is provided with a fourth threaded opening 12. The third threaded opening 11 is used to detachably seal the fourth threaded opening 12. Figure 5 A sealing ring 13 and a side sealing ring 14 are also provided at the connection position between the first threaded opening 9 and the second threaded opening 10, and at the connection position between the third threaded opening 11 and the fourth threaded opening 12. A mounting ring 15 is provided at the bottom of the internal thread of the corresponding threaded opening. The outer diameter of the mounting ring 15 is smaller than the inner diameter of the corresponding external threaded opening. The sealing ring 13 is arranged on the outside of the mounting ring 15 to seal the mounting ring 15 and the inner side of the corresponding external threaded opening. The side sealing ring 14 is arranged at the bottom of the internal thread of the corresponding threaded opening to seal the top outer side of the external thread of the corresponding threaded opening and the position of the bottom of the internal thread of the corresponding threaded opening. The sealing ring 13 and the side sealing ring 14 can effectively prevent the leakage of toxic gases that may exist in the experiment and the experimental errors caused by the entry of indoor air into the monitoring instrument.

[0029] The outlet of the collector 2 is provided with a conduit interface 16 for connecting subsequent monitoring equipment. The outer shell of the collector 2 is also provided with a bell-shaped transition section 17 for transition connection with the shell part adapted to the tube furnace and the conduit interface 16. The bell-shaped transition section 17 stabilizes the gas flow process.

[0030] In this embodiment, in order to facilitate the access to high voltage and reference voltage, a cathode plate interface 18 and an anode plate interface 19 are provided on the outer shell of the particle charger 1, which are respectively used to electrically connect to the cathode plate 3 and the anode plate 4 through the outer shell, and are used to connect the cathode plate 3 to high voltage and the anode plate 4 to the reference voltage. A high voltage board interface 20 and a reference board interface 21 are provided on the outer shell of the collector 2, which are respectively used to electrically connect to each high voltage board 5 and each reference board 6 through the outer shell, and are used to connect the high voltage board 5 and the reference board 6 to the reference voltage.

[0031] Preferably, the cathode plate 3 includes a plurality of cathode wires 22, each cathode wire 22 being distributed in a needle-like or tooth-like ring shape. The anode plate 4 includes a plurality of anode wires 23, each anode wire 23 being distributed in a grid shape.

[0032] See also Figure 6 , and also includes a voltage regulator 24 and an overvoltage protector. The voltage regulator 24 is used to electrically connect the cathode plate interface 18, the anode plate interface 19, the high-voltage board interface 20 and the reference board interface 21. The voltages used by the particle charger 1 and the collector 2 are not the same. They are both derived by the voltage regulator 24, but they are two separate systems. The voltage regulator 24 first transforms the 220V mains electricity to the required voltage through a regulating transformer. At the same time, the transformer can be adjusted according to the required voltage, and then the current is rectified through a rectifier circuit, and then filtered by a filter. Finally, the voltage regulator stabilizes the voltage and derives the voltage that meets the requirements and sends it to the corresponding power consumption end. By using the voltage regulator 24, the filtering efficiency can be adjusted. The overvoltage protector is set at the output end of the voltage regulator 24 to limit the voltage output by the voltage regulator 24 to prevent the particle charger 1 from air breakdown and causing dangerous situations.

[0033] Furthermore, the distance between adjacent high-voltage plates 5 and reference plates 6 can be adjusted, and the appropriate distance can be adjusted according to the size of the flue gas particles. Specifically, several high-voltage plates 5 and reference plates 6 assemblies or collectors 2 with different distances can be selected, or a mechanism that can adjust the distance can be set to achieve it. The recommended distance for absorbing particles of 1-50μm is 5mm. After the particle charger 1 and collector 2 are installed, the minimum distance between the high-voltage plate 5 and the reference plate 6 and the anode plate 4 is greater than 5mm.

[0034] When in use, the tubular furnace, particle charger 1, collector 2 and monitoring instrument are connected in sequence. Due to the high-intensity electric field of the cathode plate 3 and the anode plate 4, a corona phenomenon occurs at the needle end of the cathode line 22, causing the air in the ionization zone to be ionized and the particles to be charged. When the flue gas generated by heating in the tubular furnace passes through the particle charger 1, the flue gas is ionized in the ionization section due to air ionization, causing the flue gas particles to be charged, and then sent to the subsequent collector 2. Since the particles are charged, the particles are adsorbed between the high-voltage plate 5 and the reference plate 6 under the action of gravity. The air after the particles are adsorbed is sent to the subsequent monitoring instrument for corresponding analysis experiments. After the experiment is over, the particles adsorbed inside the collector 2 can be cleaned by removing it for easy use next time.

[0035] Embodiment 2:

[0036] This embodiment is a method for using an adjustable tubular ionization filter adapted to a tubular furnace, which is used for the filter in the above embodiment and includes the following steps: S1. Connect the cleaned and dried collector 2 to the particle charger 1; connect the monitoring instrument to the outlet of the collector 2; and connect the collector 2 to the outlet of the tube furnace. For the solution with the connector 7, the connector 7 also needs to be installed.

[0037] S2. Check the air tightness. If the air tightness is good, remove the particle charger 1. For the solution with a connector 7, the connector 7 is connected to the tubular furnace, and the particle charger 1 is removed from the connection between the connector 7 and the particle charger 1.

[0038] S3, heating the tube furnace to a specified temperature, feeding the experimental materials, connecting the particle charger 1 to the tube furnace, turning on the particle charger 1 and the collector 2, and conducting the experiment.

[0039] S4. After the experiment, disassemble, clean and dry the collector 2.

[0040] Preferably, in S2, the particle charger 1 and the collector 2 are connected to a voltage regulating device 24, and the voltage connected to the particle charger 1 and the collector 2 is adjusted according to the filtration efficiency required by the experiment. The voltage connected to the particle charger 1 and the collector 2 can be adjusted according to the flow rate of the experimental gas, the size of the flue gas particles, and the voltage to ensure that the particles are adsorbed by the collector 2.

[0041] During use, operators should take appropriate safety precautions, including high temperature protection, voltage protection, contact and inhalation protection against fine solid particles and droplets, etc. In addition, due to the different total amount, velocity, temperature, physical properties of the atmosphere, and the size and number of specific particles in different experiments, the optimal collection voltage for each experiment needs to be specially simulated and calculated, which is not uniform. Moreover, it is difficult for the millimeter-level collection plate to collect overly large smoke particles, and if too many particles are filtered in one experiment, the collection capacity of the collection plate is easily overloaded, and the smoke is polluted again. Therefore, the components and spatial structure of the test device must be optimized and adjusted, and appropriate detection, control equipment and test methods must be re-selected to meet the test requirements.

[0042] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. An adjustable tubular ionization filter adapted for a tubular furnace, characterized in that: It includes a particle charger and a collector; the inlet end of the particle charger is used to seal and connect to the outlet end of the tube furnace, the inlet end of the collector is used to seal and connect to the outlet end of the particle charger, and the outlet end of the collector is used to seal and connect to a monitoring instrument; the outer shell of the particle charger and the collector is a cylindrical outer shell made of insulating material, and the inner diameter is adapted to the inner diameter of the outlet end of the tube furnace; cathode plates and anode plates are arranged in sequence in the particle charger along the direction of air flow, and a plurality of high-voltage plates and a plurality of reference plates are arranged in intervals in the collector along the direction parallel to the air flow.

2. The adjustable tubular ionization filter adapted for a tubular furnace according to claim 1, characterized in that: It also includes a connector, which is provided with a tubular furnace interface and a first threaded port, the tubular furnace interface is used for detachably sealingly connecting the outlet end of the tubular furnace, the inlet end of the particle charger is provided with a second threaded port, and the first threaded port is used for detachably sealing the second threaded port.

3. The adjustable tubular ionization filter adapted for a tubular furnace according to claim 2, characterized in that: A third threaded opening is provided at the outlet end of the particle charger, and a fourth threaded opening is provided at the inlet end of the collector, and the third threaded opening is used to detachably seal the fourth threaded opening; a sealing ring and a side sealing ring are also provided at the connecting position of the first threaded opening and the second threaded opening and at the connecting position of the third threaded opening and the fourth threaded opening, and a mounting ring is provided at the bottom of the inner thread of the corresponding threaded opening, and the outer diameter of the mounting ring is smaller than the inner diameter of the corresponding outer threaded opening, and the sealing ring is arranged on the outside of the mounting ring for sealing the mounting ring and the inner side of the corresponding outer threaded opening; the side sealing ring is arranged at the bottom of the inner thread of the corresponding threaded opening for sealing the outer side of the top of the outer thread of the corresponding threaded opening and the bottom of the inner thread of the corresponding threaded opening.

4. The adjustable tubular ionization filter adapted for a tubular furnace according to claim 1, characterized in that: A conduit interface is provided at the outlet end of the collector, and a trumpet-shaped transition section is also provided on the collector shell for transitionally connecting the conduit interface.

5. The adjustable tubular ionization filter adapted for a tubular furnace according to claim 1, characterized in that: The outer shell of the particle charger is provided with a cathode plate interface and an anode plate interface, which are respectively used to electrically connect to the cathode plate and the anode plate; the outer shell of the collector is provided with a high-voltage board interface and a reference board interface, which are respectively used to electrically connect each high-voltage board and each reference board.

6. The adjustable tubular ionization filter adapted for a tubular furnace according to claim 5, characterized in that: The cathode plate comprises a plurality of cathode wires, each of which is distributed in a needle-shaped or tooth-shaped ring; the anode plate comprises a plurality of anode wires, each of which is distributed in a grid-shaped shape.

7. The adjustable tubular ionization filter adapted for a tubular furnace according to claim 5, characterized in that: It also includes a voltage regulator and an overvoltage protector. The voltage regulator is used to electrically connect the cathode plate interface, the anode plate interface, the high-voltage plate interface and the reference plate interface. The overvoltage protector is arranged at the output end of the voltage regulator to limit the voltage output by the voltage regulator.

8. The adjustable tubular ionization filter adapted for a tubular furnace according to claim 1, characterized in that: The distance between adjacent high-voltage boards and reference boards is adjustable; after installation, the minimum distance between the high-voltage board and the reference board and the anode board is greater than 5mm.

9. A method for using an adjustable tubular ionization filter adapted to a tubular furnace, for use with the filter as claimed in any one of claims 1 to 8, characterized in that: The following steps are involved: S1. Connect the clean and dry collector to the particle charger; connect the monitoring instrument to the outlet of the collector; connect the collector to the outlet of the tube furnace; S2. Check the air tightness. If the air tightness is good, remove the particle charger; S3, heating the tube furnace to a specified temperature, feeding the experimental materials, connecting the particle charger to the tube furnace, turning on the particle charger and collector, and conducting the experiment; S4. After the experiment, disassemble, clean and dry the collector.

10. The method for using the adjustable tubular ionization filter adapted to a tubular furnace according to claim 9, characterized in that: In S2, the particle charger and the collector are connected to a voltage regulating device, and the voltage connected to the particle charger and the collector is adjusted according to the filtering efficiency required by the experiment.

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