CN210906567U - Pre-charging device and dust-containing gas purification device - Google Patents
Pre-charging device and dust-containing gas purification device Download PDFInfo
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- CN210906567U CN210906567U CN201921716904.9U CN201921716904U CN210906567U CN 210906567 U CN210906567 U CN 210906567U CN 201921716904 U CN201921716904 U CN 201921716904U CN 210906567 U CN210906567 U CN 210906567U
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Abstract
The utility model relates to a dust removal and exhaust-gas treatment technical field disclose a pre-charging device and dirty gas purification device. The high-voltage power supply adopts the direct-current pulse high-voltage power supply with the base line voltage being zero, so that the permanent electric field force does not exist in the pre-charging device, the directional movement of the dust particles with the load charges in the electric field is reduced, and the permanent unidirectional electric field in the pre-charging device is avoided, thereby reducing the capture effect of the inner wall of the metal shell on the dust particles with the load charges under the action of the permanent unidirectional electric field, and enabling the pre-charging device to operate efficiently for a long time; meanwhile, the problem that the charging effect is reduced because the discharge tip of the discharge metal sheet is wrapped by dust particles loaded with reversed-phase charges can be solved.
Description
Technical Field
The utility model relates to a remove dust and exhaust-gas treatment technical field, especially relate to a pre-charging device and dirty gas purification device.
Background
Removing dust particles in gas is a common operation in industry, one dust removing mode in the prior art is to introduce high-voltage current into a corona electrode of a pre-charging device through a direct-current high-voltage power supply, form an electric field between the corona electrode and a grounding electrode to charge dust particles in the airflow, then introduce the airflow with the charged dust particles into a dust removing box body, install a conductive porous ceramic filter pipe in the dust removing box body, load high-voltage negative electricity on the surface of the conductive porous ceramic filter pipe by using the high-voltage power supply, when the dust particles charged by the pre-charging device reach the surface of the conductive porous ceramic filter pipe along with the airflow, the dust particles cannot enter a fine filter pore passage of the conductive porous ceramic filter pipe because the dust particles are loaded with the same charge as the surface of the conductive porous ceramic filter pipe, and only a loose powder cake layer is formed on the surface of the conductive porous ceramic filter pipe, meanwhile, as the charges among the dust particles are the same, the dust particles have obvious electrostatic repulsion effect, so that a powder cake layer formed on the surface of the conductive porous ceramic filter tube is looser, the gas resistance of the powder cake layer is very small, the powder cake layer can be easily regenerated by compressed gas back blowing, and meanwhile, the surface of the regenerated conductive porous ceramic filter tube is clean and fully regenerated and is not easy to have dust residues.
When a pre-charging device is used for charging dust particles in air flow, a direct-current high-voltage power supply is used, and a long unidirectional electric field exists in the pre-charging device, so that a large amount of dust particles are captured on a ground electrode, and the stable operation of the pre-charging device is influenced. Meanwhile, a small amount of dust particles loaded with reversed charges wrap the discharge tip of the corona electrode, so that the charging effect is reduced.
Although the rapping mechanism can remove most of dust particles attached to the surface of the grounding electrode, the corona electrode is positioned in the grounding electrode, and the dust particles attached to the surface of the corona electrode cannot be removed by the rapping mode; moreover, the volume of the pre-charging device is small, a special rapping mechanism is not equipped, and although the rapping mechanism equipped with the dust removal device can be used, the rapping mechanism equipped with the dust removal device is thick and heavy, the working capacity of the rapping mechanism cannot be fully applied, and the problem of serious resource waste exists.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a pre-charging device and dirty gas purification device can effectively clear away the attached dust granule on the corona electrode of pre-charging device and the ground electrode simultaneously, guarantees the lotus electric effect of pre-charging device.
To achieve the purpose, the utility model adopts the following technical proposal:
a pre-charging device comprises a metal shell provided with a gas inlet and a gas outlet, a corona electrode and a high-voltage power supply, wherein one end of the corona electrode is arranged in the metal shell, the corona electrode comprises a conductive central tube electrically connected with the high-voltage power supply, and a plurality of discharging metal sheets which are distributed along the extending direction of the conductive central tube and sleeved outside the conductive central tube, and a plurality of discharging tips distributed along the circumferential direction of each discharging metal sheet are arranged on each discharging metal sheet; the high-voltage power supply is a direct-current pulse high-voltage power supply with zero baseline voltage.
As a preferable technical solution of the above pre-charging device, a plurality of purge holes are formed in the conductive center tube along the extending direction of the conductive center tube;
the pre-charging device further comprises a blowing component which is used for providing compressed gas for the conductive central pipe, so that the compressed gas is sprayed into the metal shell from the blowing holes to blow charged dust particles attached to the surface of the discharging metal sheet.
As a preferable technical solution of the pre-charging device, the plurality of purge holes are divided into a plurality of purge hole groups distributed along the axial direction of the conductive central tube, each purge hole group includes a plurality of purge holes, and the plurality of purge holes of the same purge hole group are distributed along the circumferential direction of the conductive central tube.
As a preferable technical solution of the precharge device, each of the discharge metal sheets is provided corresponding to at least one of the purge hole groups.
As a preferable technical solution of the pre-charging device, the purging hole group corresponding to the discharging metal sheet is arranged upstream of the position on the conductive central tube where the discharging metal sheet is sleeved.
As a preferable technical scheme of the pre-charging device, the outer wall of the metal shell is provided with a rapping mechanism.
As a preferable technical solution of the precharge device, the precharge device further includes:
the insulating porcelain bushing is arranged at one axial end of the metal shell;
one end of the wall bushing penetrates through the insulating porcelain bushing and extends into the metal shell, and the wall bushing is supported by the insulating porcelain bushing; the conductive center tube penetrates through the wall bushing and is supported by the wall bushing.
As a preferable technical solution of the pre-charging device, the discharging metal sheet located at the lowermost position is connected to the conductive central tube, and a supporting sleeve is clamped between two adjacent discharging metal sheets.
As a preferable technical scheme of the pre-charging device, a dust accumulation chamber is arranged below the metal shell, a dust removal port is arranged at the bottom of the dust accumulation chamber, and an air lock is arranged at the dust removal port.
The utility model also provides a dirty gas purification device, including foretell pre-charging device.
The utility model has the advantages that: the high-voltage power supply adopts the direct-current pulse high-voltage power supply with zero baseline voltage, can effectively avoid the problems of arc discharge and breakdown under the condition of airflow fluctuation when adopting the direct-current high-voltage power supply, and maintains stable and efficient dust charge effect; when the direct-current pulse high-voltage power supply does not provide pulse voltage, because the base line voltage of the direct-current pulse high-voltage power supply is zero, the discharge tip of the discharge metal sheet does not discharge at the moment, the inner wall of the metal shell loses the capture effect on the dust particles with the load charges, the dust particles with the load charges flow out from the gas outlet along with the airflow, and a long unidirectional electric field is avoided in the pre-charger, so that the capture effect of the inner wall of the metal shell on the dust particles with the load charges under the action of the long unidirectional electric field is reduced, and the pre-charger can run efficiently for a long time; meanwhile, the problem that the charging effect is reduced because the discharge tip of the discharge metal sheet is wrapped by dust particles loaded with reversed-phase charges can be solved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.
FIG. 1 is a schematic diagram of a pre-charging device provided by an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a corona electrode provided in an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a plurality of discharge metal sheets according to an embodiment of the present invention.
In the figure:
1. a metal housing; 11. a gas inlet; 12. a gas outlet;
2. a corona electrode; 21. a conductive center tube; 211. a purge hole; 22. a discharge metal sheet; 221. a discharge tip;
3. a high voltage power supply; 4. an insulating porcelain bushing; 5. a wall bushing.
Detailed Description
In order to make the technical problem solved by the present invention, the technical solution adopted by the present invention and the technical effect achieved by the present invention clearer, the technical solution of the present invention will be further explained by combining the drawings and by means of the specific implementation manner. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the elements related to the present invention are shown in the drawings.
As shown in fig. 1 and 2, the present embodiment provides a pre-charger, which comprises a metal shell 1, a corona electrode 2 and a high voltage power supply 3, wherein the metal shell 1 is provided with a gas inlet 11 and a gas outlet 12, and dust-containing gas enters the metal shell 1 from the gas inlet 11 and is discharged from the gas outlet 12. In the present embodiment, the metal shell 1 is cylindrical, but the shape is not limited to the metal shell 1 having a cylindrical structure, and the metal shell 1 having another shape may also be used, which is not limited to this example.
The corona electrode 2 includes a conductive central tube 21, and a plurality of discharging metal sheets 22 distributed along the extending direction of the conductive central tube 21 and sleeved outside the conductive central tube 21, and each discharging metal sheet 22 is provided with a plurality of discharging tips 221 distributed along the circumferential direction thereof.
The positive pole of the high-voltage power supply 3 is grounded, the negative pole of the high-voltage power supply 3 is electrically connected with the conductive central tube 21, one end of the conductive central tube 21 is arranged in the metal shell 1, the conductive central tube 21 introduces high-voltage current through the high-voltage power supply 3 and discharges through the plurality of discharge tips 221 on the discharge metal sheet 22, so that a high-voltage electric field is formed between the metal shell 1 and the discharge tips 221, and dust particles in dust-containing gas are charged.
In this embodiment, the high-voltage power supply 3 adopts a dc pulse high-voltage power supply with a zero baseline voltage, so that the problems of arc discharge and breakdown caused by airflow fluctuation when the dc high-voltage power supply is adopted can be effectively avoided, and a stable and efficient dust charging effect is maintained; when the direct-current pulse high-voltage power supply does not provide pulse voltage, because the base line voltage of the direct-current pulse high-voltage power supply is zero, the discharge tip 221 of the discharge metal sheet 22 does not discharge, the inner wall of the metal shell 1 loses the capture effect on the dust particles loaded with the charges, the dust particles loaded with the charges flow out of the gas outlet 12 along with the gas flow, and a long unidirectional electric field is avoided in the pre-charger, so that the capture effect of the inner wall of the metal shell 1 on the dust particles loaded with the charges under the action of the long unidirectional electric field is reduced, and the pre-charger can run efficiently for a long time; meanwhile, the problem that the charging effect is reduced because the discharge tip 221 of the discharge metal sheet 22 is wrapped by dust particles loaded with reversed-phase charges can be solved.
In this embodiment, the frequency of the dc pulse high voltage power supply is 50Hz to 10MHz, and the voltage peak is 5kV to 100 kV.
Further, in order to ensure the electrical safety, the metal shell 1 is grounded.
After the direct-current pulse high-voltage power supply with the baseline voltage of zero is adopted, a small amount of dust particles loaded with reversed-phase charges still wrap the discharge tip 221, so that the charging effect is influenced. Therefore, the blowing component is additionally arranged in the embodiment, the plurality of blowing holes 211 are formed in the conductive central tube 21 along the extending direction of the conductive central tube, and the blowing component works to provide compressed gas for the conductive central tube 21, so that the compressed gas is sprayed into the metal shell 1 from the blowing holes 211 to blow charged dust particles attached to the surface of the discharging metal sheet 22, and therefore the problem that the dust particles are attached to the discharging tip 221 of the discharging metal sheet 22 is solved, and the charging effect of the pre-charging device is guaranteed. The structure of the blowing component can adopt an air compressor in the prior art.
The direct-current pulse high-voltage power supply and the blowing component are matched to remove dust, so that the dust remover is very suitable for charging dust particles in smoke with fine particles and high dust concentration.
Further, the plurality of purge holes 211 are divided into a plurality of purge hole groups distributed along the axial direction of the electrically conductive center tube 21, each purge hole group includes a plurality of purge holes, and the plurality of purge holes 211 of the same purge hole group are distributed along the circumferential direction of the electrically conductive center tube 21. Each of the discharge metal sheets 22 is provided corresponding to at least one purge hole group. Preferably, a purge hole group corresponding to the discharge metal sheet 22 is provided upstream of the position where the discharge metal sheet 22 is fitted on the conductive center tube 21. More specifically, when the pre-charging device is placed vertically, the lower end of the purge hole 211 corresponding to each discharge metal piece 22 is flush with the upper surface of the discharge metal piece 22, and a purge hole group is provided for each discharge metal piece 22 to ensure the effect of removing the dust particles loaded with electric charges attached to each discharge metal piece 22.
The pre-charging device works under the condition of negative pressure, and in order to avoid the influence of the fed compressed gas on the negative pressure working environment of the pre-charging device, intermittent purging is generally adopted to reduce the amount of the compressed gas fed into the pre-charging device.
In addition, the dust-containing gas has different components and different requirements on the purging component. For example, a condensable gas component (e.g., As) is contained in the dust-containing gas2O3、Cu2Cl2、H2SeO3、ZnCl2Etc.), the condensable gas components therein are easily condensed to form powders, and the powders have strong adhesion, which will cause the metal case 1 to be broken down over a long period of time, thereby causing the high-voltage power supply 3 to frequently trip, and finally causing the failure of the charging process. Therefore, after the compressed gas is heated, the compressed gas is sent into the conductive central tube 21 through the purging component, and meanwhile, the purging and dust removal are realized in a mode of combining the improvement of the temperature of the compressed gas and the reduction of the amount of the compressed gas by matching with an intermittent purging mode.
Further, when the dust-containing gas contains dust particles with larger particle sizes, the effect of electric field charge is more obvious, at the moment, a rapping mechanism can be arranged on the outer wall of the metal shell 1, the inner wall of the metal shell 1 can be ensured not to accumulate excessive dust particles through continuous or intermittent rapping, and the stable operation of the pre-charging device is ensured.
The pre-charging device provided by the embodiment further comprises an insulating porcelain bushing 4 and a wall bushing 5, wherein the insulating porcelain bushing 4 is arranged at one axial end of the metal shell 1; one end of the wall bushing 5 penetrates through the insulating porcelain bushing 4 to extend into the metal shell 1, and the wall bushing 5 is supported by the insulating porcelain bushing 4; the conductive center tube 21 extends through the wall bushing 5 and the conductive center tube 21 is supported by the wall bushing 5. Because the working environment of the whole pre-charging device is negative pressure, the installation requirement can be met only by adopting a supporting mode, and the requirement on the sealing performance between the wall bushing 5 and the insulating porcelain bushing 4 and between the wall bushing 5 and the conductive central tube 21 is not high.
The discharge metal sheet 22 positioned at the lowest part is connected with the conductive central tube 21, and a support sleeve is clamped between two adjacent discharge metal sheets 22. The discharge metal sheet 22 which is positioned above the support sleeve and is adjacent to the support sleeve is supported by the support sleeve, so that the discharge metal sheet 22 is simple in installation mode and quick to install.
The lower part of the metal shell 1 is provided with a funnel-shaped dust accumulation chamber, the bottom of the dust accumulation chamber is provided with a dust removal port, and the dust removal port is provided with an air lock. When the dust in the dust accumulation chamber is accumulated to a certain degree, the air lock will be automatically opened to discharge the dust, and the air lock is automatically closed after the dust is discharged. The structure of the air lock is the prior art, and is not described in detail herein.
The structure of the discharge metal sheet 22 in this embodiment is various, and may be a metal sheet with a sharp edge. As shown with particular reference to fig. 3, three discharge tips 221, four discharge tips 221, five discharge tips 221, or more may be provided. The present embodiment does not specifically limit the configuration of the discharge metal sheet 22, as long as the discharge metal sheet 22 can form a stable and uniform electric field with the metal shell 1.
The embodiment also provides a dust-containing gas purification device which comprises the pre-charging device.
It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Claims (10)
1. A pre-charging device comprises a metal shell (1) provided with a gas inlet (11) and a gas outlet (12), a corona electrode (2) with one end arranged in the metal shell (1), and a high-voltage power supply (3), wherein the corona electrode (2) comprises a conductive central tube (21) electrically connected with the high-voltage power supply (3), and a plurality of discharging metal sheets (22) which are distributed along the extending direction of the conductive central tube (21) and sleeved outside the conductive central tube (21), and a plurality of discharging tips (221) which are distributed along the circumferential direction of each discharging metal sheet (22) are arranged on each discharging metal sheet; the high-voltage power supply (3) is a direct-current pulse high-voltage power supply with zero baseline voltage.
2. The pre-charger according to claim 1, characterized in that the conductive central tube (21) is provided with a plurality of purge holes (211) along the extension direction thereof;
the pre-charging device further comprises a blowing component for providing compressed gas for the conductive central tube (21) and enabling the compressed gas to be sprayed into the metal shell (1) from the blowing holes (211) to blow charged dust particles attached to the surface of the discharge metal sheet (22).
3. The pre-charging device according to claim 2, characterized in that the plurality of purge holes (211) are divided into a plurality of purge hole groups distributed axially along the electrically conductive central tube (21), each purge hole group comprising a plurality of purge holes (211), the plurality of purge holes (211) of the same purge hole group being distributed circumferentially of the electrically conductive central tube (21).
4. The pre-charger according to claim 3, characterized in that each discharge metal sheet (22) is provided in correspondence with at least one of said groups of purge holes.
5. The pre-charging device according to claim 4, characterized in that the purging hole group corresponding to the discharging metal sheet (22) is arranged on the conductive central tube (21) (6) at the upstream of the position where the discharging metal sheet (22) is sleeved.
6. The pre-charger according to any of the claims 1 to 5, characterised in that the outer wall of the metal housing (1) is provided with a rapping mechanism.
7. The pre-charger according to any one of claims 1 to 5, further comprising:
the insulating porcelain bushing (4) is arranged at one axial end of the metal shell (1);
one end of the wall bushing (5) penetrates through the insulating porcelain bushing (4) to extend into the metal shell (1) and the wall bushing (5) is supported by the insulating porcelain bushing (4); the conductive central tube (21) penetrates through the wall bushing (5) and is supported by the wall bushing (5) to form the conductive central tube (21).
8. The pre-charger according to any of claims 1 to 5, characterized in that the lowermost discharge foil (22) is connected to the conductive central tube (21), with a support sleeve being sandwiched between two adjacent discharge foils (22).
9. The pre-charger according to any one of claims 1 to 5, characterized in that a dust accumulation chamber is arranged below the metal shell (1), and a dust removal port is arranged at the bottom of the dust accumulation chamber and provided with an air lock.
10. A dust-laden gas cleaning apparatus, comprising a pre-charger according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921716904.9U CN210906567U (en) | 2019-10-14 | 2019-10-14 | Pre-charging device and dust-containing gas purification device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921716904.9U CN210906567U (en) | 2019-10-14 | 2019-10-14 | Pre-charging device and dust-containing gas purification device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210906567U true CN210906567U (en) | 2020-07-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921716904.9U Active CN210906567U (en) | 2019-10-14 | 2019-10-14 | Pre-charging device and dust-containing gas purification device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210906567U (en) |
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2019
- 2019-10-14 CN CN201921716904.9U patent/CN210906567U/en active Active
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