CN113350942A - Welding smoke purification system and method based on plasma - Google Patents
Welding smoke purification system and method based on plasma Download PDFInfo
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- CN113350942A CN113350942A CN202110617267.5A CN202110617267A CN113350942A CN 113350942 A CN113350942 A CN 113350942A CN 202110617267 A CN202110617267 A CN 202110617267A CN 113350942 A CN113350942 A CN 113350942A
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Abstract
The invention discloses a plasma-based welding fume purification system and a method, wherein the plasma-based welding fume purification system comprises: the dust collection structure faces the welding point and is used for sucking dust generated by the welding point; the plasma electrostatic adsorption device is communicated with the dust collection structure and is used for performing electrostatic adsorption on the sucked dust to finish primary dust removal; the dust washing device is communicated with the plasma electrostatic adsorption device and is used for washing and filtering the dust which is subjected to preliminary dust removal and can be dissolved in water to finish removal; and the oxidation device is communicated with the dust washing device and is used for removing the dust which cannot be dissolved in water after the preliminary dust removal through oxidation reaction so as to obtain purified gas emission. The welding smoke dust purification system based on the plasma can efficiently treat most of smoke dust of materials, and reaches the emission standard of the smoke dust.
Description
Technical Field
The invention relates to the technical field of purification of working environments, in particular to a plasma-based welding fume purification system and method.
Background
Nowadays, the engineering machinery industry develops very rapidly, wherein the production and processing of important structural components are mainly completed by welding. A large amount of welding smoke is generated in the welding process, and if the welding smoke is not treated, the welding smoke can not only cause great harm to the environment, but also damage the health of workers, and is an important factor for causing various occupational lung diseases including pneumoconiosis.
The existing purification system has poor filtering effect, smoke generated by welding of unknown materials cannot be well treated, and the treated smoke cannot reach the emission standard.
Disclosure of Invention
The invention aims to provide a plasma-based welding fume purification system and a plasma-based welding fume purification method, wherein the plasma-based welding fume purification system can efficiently process most of material fume to reach the fume emission standard.
To achieve the above object, the present invention provides a plasma-based welding fume purification system, comprising: the dust collection structure faces the welding point and is used for sucking dust generated by the welding point; the plasma electrostatic adsorption device is communicated with the dust collection structure and is used for performing electrostatic adsorption on the sucked dust to finish primary dust removal; the dust washing device is communicated with the plasma electrostatic adsorption device and is used for washing and filtering the dust which is subjected to preliminary dust removal and can be dissolved in water to finish removal; and the oxidation device is communicated with the dust washing device and is used for removing the dust which cannot be dissolved in water after the preliminary dust removal through oxidation reaction so as to obtain purified gas emission.
Preferably, the dust suction structure includes: the device comprises a dust hood facing a welding point, a connecting pipe with one end communicated with the dust hood and the other end communicated with a turbine, and a filter screen arranged between the dust hood and the connecting pipe; the turbine can provide suction force for sucking the dust, and one end, far away from the dust hood, of the turbine is communicated with the plasma electrostatic adsorption device.
Preferably, the plasma electrostatic adsorption device includes: the plasma generating mechanism is communicated with the dust collecting structure and is used for carrying out corona charge on the sucked dust; and the adsorption device is communicated with the plasma generation mechanism and is used for adsorbing the dust which passes through the plasma generation mechanism so as to complete the primary dust removal of the sucked dust.
Preferably, the dust washing device comprises: the gas injection pipe is communicated with the plasma electrostatic adsorption device and is used for ejecting the dust subjected to primary dust removal from the side surface; the dust washing box is coated on the outer side of the gas injection pipe, communicated with the oxidation device and used for bearing dust capable of being dissolved in water; and the water mist spray head is arranged on the side surface of the dust washing box and sprays water towards the inside of the dust washing box.
Preferably, the dust washing device further comprises: and one end of the water circulation structure is communicated with the dust washing box, and the other end of the water circulation structure is communicated with the water mist spray head and is used for filtering water dissolved with dust in the dust washing box and then spraying the water mist spray head.
Preferably, the oxidation apparatus comprises: the fan is communicated with the dust washing device and is used for sucking dust which is not dissolved in water; a first solution chamber for removing a part of particles in the dust sucked by the fan, wherein the part of particles comprises HF and a part of NOX(ii) a A high-temperature oxidation chamber for oxidizing CO in the dust sucked by the fan into CO2And another part of NOXConversion to N2(ii) a And a second solution chamber for introducing CO generated from the high-temperature oxidation chamber2And removing to obtain purified gas emission.
Preferably, the high temperature oxidation chamber comprises: one end of the cavity is communicated with the first solution chamber, and the other end of the cavity is communicated with the second solution chamber; and the heating plate is arranged in the chamber and is used for oxidizing CO in the dust sucked by the fan into CO2And another part of NOXConversion to N2Reaction conditions are provided.
Preferably, the first solution chamber is configured to contain KOH and KMnO4A chamber of the solution of (a); the second solution chamber is configured as a chamber containing a solution of NaOH.
Preferably, the diameter of the opening of the filter screen is configured to be 0.1-0.4 μm.
In addition, the invention also provides a plasma-based welding fume purification method, which comprises the following steps: performing electrostatic adsorption on the sucked dust generated after welding to finish primary dust removal; cleaning and filtering the dust which is subjected to the preliminary dust removal and can be dissolved in water to finish the removal; and removing the water-insoluble dust after the preliminary dust removal is finished through an oxidation reaction to obtain purified gas emission, wherein the water-insoluble dust is configured to comprise HF and NOX、CO。
According to the technical scheme, the plasma electrostatic adsorption device can be used for preliminarily removing dust sucked by the plasma electrostatic adsorption device, then the dust washing device can be used for removing dust particles capable of being dissolved in water, the oxidation reaction is carried out on the dust particles which are not dissolved in water, the purification is completed by adopting different temperature removal modes in steps, the purified gas is discharged, the whole process is efficient, and the emission standard of the dust can be met.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic diagram illustrating the overall construction of a plasma-based welding fume purification system of the present invention;
FIG. 2 is a schematic diagram illustrating the construction of a dust scrubber of a plasma-based welding fume purification system of the present invention;
FIG. 3 is a schematic diagram illustrating the configuration of an oxidizer of a plasma-based welding fume purification system of the present invention;
FIG. 4 is a general cross-sectional view of the present invention illustrating a plasma-based welding fume purification system of the present invention; and
FIG. 5 is a flow chart illustrating a plasma-based cleaning method for welding fumes in accordance with the present invention.
Description of the reference numerals
1 dust hood 2 filter screen
3 connecting pipe 4 turbine
5 plasma generating mechanism 6 adsorption device
7 first dust suction pipe 8 second dust suction pipe
9 oxidation unit 10 filter element
11 a first shunt pipe 12 a second shunt pipe
13 third shunt pipe 14 water tank
15 base 16 round shunt tubes
17 water mist spray head 18 dust washing box
19 jet pipe 20 fourth shunt pipe
21 mechanical water pump 22 wheel
23 blower 24 first solution chamber
25 high temperature oxidation chamber 26 heating plate
27 second solution chamber
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
In the present invention, unless otherwise specified, the directional words included in the terms such as "up, down, left, right" and the like merely represent the directions of the terms in a conventional use state or are colloquially known by those skilled in the art, and should not be construed as limiting the terms.
FIG. 1 is a plasma-based welding fume purification system provided by the present invention, as shown in FIG. 1, the plasma-based welding fume purification system comprising: the dust collection structure faces the welding point and is used for sucking dust generated by the welding point; the plasma electrostatic adsorption device 6 is communicated with the dust collection structure and is used for performing electrostatic adsorption on the sucked dust to finish primary dust removal; the dust washing device is communicated with the plasma electrostatic adsorption device 6 and is used for washing and filtering the dust which is subjected to preliminary dust removal and can be dissolved in water to finish removal; and the oxidation device 9 is communicated with the dust washing device and is used for removing the dust which cannot be dissolved in water after the preliminary dust removal through oxidation reaction so as to obtain purified gas emission. As shown in fig. 1, the whole system is seated on a base 15; the wheels 22 are arranged on the base of the whole set of system, so that the movement is convenient; the following describes the specific technical solutions of the present invention in detail with reference to fig. 1, 2, 3 and 4.
Preferably, as shown in fig. 1, the dust suction structure may include: the device comprises a dust hood 1 facing a welding point, a connecting pipe 3 with one end communicated with the dust hood 1 and the other end communicated with a turbine 4, and a filter screen 2 arranged between the dust hood 1 and the connecting pipe 3; wherein, the turbine 4 can provide the suction force for sucking the dust, and one end far away from the dust hood 1 is communicated with the plasma electrostatic adsorption device 6.
The welding smoke dust is collected by a dust hood 1, larger smoke dust particles are filtered by a filter screen 2, dust is absorbed by a turbine 4, the smoke dust sequentially enters a plasma generating mechanism 5 through a connecting pipe 3, and after corona charge is carried out on the welding smoke dust, preliminary dust removal is carried out by an adsorption device 6; after the primary dust removal, the smoke dust enters the dust cleaning device through the first dust suction pipe 7, the untreated welding smoke dust (dust or smoke dust dissolved in water) is treated again to obtain mixed liquid of the smoke dust and the water, and the mixed liquid enters the filter element 10 through the first shunt pipe 11 for filtration and purification.
Preferably, the plasma electrostatic adsorption device 6 comprises: the plasma generating mechanism 5 is communicated with the dust collecting structure and is used for carrying out corona charge on the sucked dust; and the adsorption device 6 is communicated with the plasma generation mechanism 5 and is used for adsorbing the dust which passes through the plasma generation mechanism 5 so as to complete the primary dust removal of the sucked dust.
The plasma generating mechanism 5 carries out corona charge on the entering smoke particles, the smoke particles with negative charges enter the adsorption device 6 under the action of electric field force, and the dust particles with negative charges move to the dust collecting electrode plate and are adsorbed.
Preferably, the dust washing device may include: the gas injection pipe 19 is communicated with the plasma electrostatic adsorption device 6 and is used for ejecting the dust subjected to primary dust removal from the side surface; the dust washing box 18 is coated on the outer side of the gas spraying pipe 19, communicated with the oxidation device 9 and used for bearing dust capable of being dissolved in water; and a water mist spray head 17 disposed at a side surface of the dust washing box 18 and spraying water toward the inside of the dust washing box 18.
Preferably, the dust washing device further comprises: and one end of the water circulation structure is communicated with the dust washing box 18, and the other end of the water circulation structure is communicated with the water mist spray head 17 and is used for filtering water dissolved with dust in the dust washing box 18 and then spraying the water mist spray head 17.
Wherein the water circulation structure comprises: the water tank 14 stores clean water which enters the water tank 14 through the fourth shunt pipe 20 after being purified by the filter element 10; the mechanical water pump 21 is used for conveying water stored in the water tank 14 to the circular shunt pipe 16 through the third shunt pipe 13 and the second shunt pipe 12 for the water spray nozzle 17. The specific structure is shown in fig. 2. Wherein, four water mist spray heads 17 are arranged on the circular diversion pipe 16, and the four water mist spray heads 17 are separated by 90 degrees and lead to the interior of the dust washing box 18; when the smoke particles enter the dust washing box 18 through the air injection pipe 19, the water mist sprayed by the water mist spray head 17 can be mixed with the smoke particles, so that the dust washing purpose is achieved.
Preferably, as shown in fig. 3, the oxidation device 9 comprises: the fan 23 is communicated with the dust washing device and is used for sucking dust which is not dissolved in water; a first solution chamber 24 for removing a part of particles in the dust sucked by the blower 23, wherein the part of particles comprises HF and a part of NOX(ii) a A high temperature oxidation chamber 25 for oxidizing CO in the dust sucked by the blower 23 into CO2And another part of NOXConversion to N2(ii) a And a second solution chamber 27 for introducing CO generated from the high temperature oxidation chamber 252And removing to obtain purified gas emission.
Preferably, the high temperature oxidation chamber 25 includes: a chamber having one end connected to the first solution chamber 24 and the other end connected to the second solution chamber 27; and a heating plate 26 disposed in the chamber for oxidizing CO in the dust sucked by the blower 23 into CO2And another part of NOXConversion to N2Reaction conditions are provided.
Preferably, the first solution chamber 24 is configured to contain KOH and KMnO4A chamber of the solution of (a); the second solution chamber 27 is configured as a chamber containing a solution of NaOH.
Wherein, the welding smoke dust or dust filtered by the dust washing device is sucked by the fan 23 and enters the oxidation device 9 through the second dust absorption pipe 8; the oxidation device 9 consists of a fan 23 and KOH and KMnO4A first solution chamber 24 for mixing the solutions, a heating plate 26, a second solution chamber 27 for containing a NaOH solution; the welding fume enters a furnace containing KOH and KMnO4In the first solution chamber 24 of the mixed solution, HF and most of NO in soot particles are removedX(ii) a The treated smoke particles enter a high-temperature oxidation chamber 25 containing a heating plate 26; the heating plate 26 may oxidize CO in the soot particles to CO2、NOXConversion to N2(ii) a The treated soot particles enter a second solution chamber 27 containing NaOH solution for removing CO2And at the moment, the welding fume is processed, so that the emission standard is met.
Preferably, the diameter of the opening of the filter net 2 is configured to be 0.1-0.4 μm. Wherein the particle size of the welding fume is within the range of 0.01-0.4 μm, and is mostly about 0.1 μm. The filter screen 2 can remove smoke dust particles with larger diameters, and the burden of subsequent purification is reduced.
In addition, as shown in fig. 5, the present invention also provides a plasma-based welding fume purification method, including:
s501, performing electrostatic adsorption on the sucked dust generated after welding to finish primary dust removal;
s502, cleaning and filtering the dust which is subjected to preliminary dust removal and can be dissolved in water to finish removal; and
s503, removing the water-insoluble dust subjected to the preliminary dust removal through an oxidation reaction to obtain a purified gas emission, wherein the water-insoluble dust is configured to include HF and NOX、CO。
Compared with the prior art, the plasma-based welding fume purification method has the same distinguishing technical characteristics and technical effects as the plasma-based welding fume purification system, and is not repeated herein.
The above are merely examples of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (10)
1. A plasma-based welding fume purification system, said plasma-based welding fume purification system comprising:
the dust collection structure faces the welding point and is used for sucking dust generated by the welding point;
the plasma electrostatic adsorption device (6) is communicated with the dust collection structure and is used for performing electrostatic adsorption on the sucked dust to finish primary dust removal;
the dust washing device is communicated with the plasma electrostatic adsorption device (6) and is used for washing and filtering the dust which is subjected to preliminary dust removal and can be dissolved in water to finish removal; and
and the oxidation device (9) is communicated with the dust washing device and is used for removing the dust which is not dissolved in water after the preliminary dust removal through oxidation reaction so as to obtain purified gas for emission.
2. The plasma-based welding fume purification system of claim 1, wherein said dust extraction structure comprises: the device comprises a dust hood (1) facing a welding point, a connecting pipe (3) with one end communicated with the dust hood (1) and the other end communicated with a turbine (2), and a filter screen (2) arranged between the dust hood (1) and the connecting pipe (3); the turbine (2) can provide suction force for sucking the dust, and one end, far away from the dust hood (1), of the turbine is communicated with the plasma electrostatic adsorption device (6).
3. A plasma-based welding fume purification system according to claim 1, characterized in that said plasma electrostatic adsorption device (6) comprises:
the plasma generating mechanism (5) is communicated with the dust collecting structure and is used for carrying out corona charge on the sucked dust; and
and the adsorption device (6) is communicated with the plasma generation mechanism (5) and is used for adsorbing the dust which passes through the plasma generation mechanism (5) so as to finish primary dust removal of the sucked dust.
4. The plasma-based welding fume purification system of claim 1, wherein said dust scrubber comprises:
the gas injection pipe (19) is communicated with the plasma electrostatic adsorption device (6) and is used for ejecting the dust subjected to primary dust removal from the side surface;
the dust washing box (18) is coated on the outer side of the gas injection pipe (19), communicated with the oxidation device (9) and used for bearing dust capable of being dissolved in water; and
and the water mist spray head (17) is arranged on the side surface of the dust washing box (18) and sprays water towards the inside of the dust washing box (18).
5. The plasma-based welding fume purification system of claim 4, wherein said dust scrubber further comprises:
and one end of the water circulation structure is communicated with the dust washing box (18), the other end of the water circulation structure is communicated with the water mist spray head (17), and the water dissolved with dust in the dust washing box (18) is filtered and then is sprayed out of the water mist spray head (17).
6. The plasma-based welding fume purification system according to claim 1, characterized in that said oxidation means (9) comprises:
the fan (23) is communicated with the dust washing device and is used for sucking dust which is not dissolved in water;
a first solution chamber (24) for removing a portion of particles in the dust sucked by the fan (23), wherein the portion of particles comprises HF and a portion of NOX；
A high-temperature oxidation chamber (25) for oxidizing CO in the dust sucked by the fan (23) into CO2And another part of NOXConversion to N2(ii) a And
a second solution chamber (27) for introducing CO produced in the high temperature oxidation chamber (25)2And removing to obtain purified gas emission.
7. The plasma-based welding fume purification system according to claim 6, wherein said high temperature oxidation chamber (25) comprises:
a chamber having one end connected to the first solution chamber (24) and the other end connected to the second solution chamber (27); and
a heating plate (26) disposed in the chamber for oxidizing CO in the dust sucked by the fan (23) into CO2And another part of NOXConversion to N2Reaction conditions are provided.
8. The plasma-based welding fume purification system according to claim 6, wherein said first solution chamber (24) is configured to contain KOH and KMnO4A chamber of the solution of (a);
the second solution chamber (27) is configured as a chamber containing a solution of NaOH.
9. The plasma-based welding fume purification system according to claim 2, characterized in that the mesh opening diameter of the filter mesh (2) is configured to be 0.1-0.4 μm.
10. A plasma-based cleaning method for welding fumes, the plasma-based cleaning method for welding fumes comprising:
performing electrostatic adsorption on the sucked dust generated after welding to finish primary dust removal;
cleaning and filtering the dust which is subjected to the preliminary dust removal and can be dissolved in water to finish the removal; and
removing the water-insoluble dust after the preliminary dust removal through an oxidation reaction to obtain purified gas emission, wherein the water-insoluble dust is configured to include HF and NOX、CO。
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| CN202110617267.5A CN113350942A (en) | 2021-06-03 | 2021-06-03 | Welding smoke purification system and method based on plasma |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110617267.5A CN113350942A (en) | 2021-06-03 | 2021-06-03 | Welding smoke purification system and method based on plasma |
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| JPS58156323A (en) * | 1982-03-15 | 1983-09-17 | Hitachi Ltd | Filtering type dust collector |
| JP2000079320A (en) * | 1998-09-07 | 2000-03-21 | Kureha Kankyo Kk | Advanced treatment of exhaust gas from incinerator |
| CN200966972Y (en) * | 2006-11-10 | 2007-10-31 | 江阴嘉顿环保设备有限公司 | Plasma welding smoke and waste gas purifying machine |
| CN104138699A (en) * | 2014-07-29 | 2014-11-12 | 张利峰 | Electrostatic water mist air purification device |
| CN108031225A (en) * | 2017-12-13 | 2018-05-15 | 苏州润昇精密机械有限公司 | A kind of weld fumes processing unit |
| CN109200802A (en) * | 2018-11-28 | 2019-01-15 | 佛山科学技术学院 | A kind of Furniture Factory VOC purifying processing device |
| CN110947257A (en) * | 2019-12-20 | 2020-04-03 | 南京木禾环境科技有限公司 | High-efficient compound movable organic volatile gas treatment facility |
-
2021
- 2021-06-03 CN CN202110617267.5A patent/CN113350942A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58156323A (en) * | 1982-03-15 | 1983-09-17 | Hitachi Ltd | Filtering type dust collector |
| JP2000079320A (en) * | 1998-09-07 | 2000-03-21 | Kureha Kankyo Kk | Advanced treatment of exhaust gas from incinerator |
| CN200966972Y (en) * | 2006-11-10 | 2007-10-31 | 江阴嘉顿环保设备有限公司 | Plasma welding smoke and waste gas purifying machine |
| CN104138699A (en) * | 2014-07-29 | 2014-11-12 | 张利峰 | Electrostatic water mist air purification device |
| CN108031225A (en) * | 2017-12-13 | 2018-05-15 | 苏州润昇精密机械有限公司 | A kind of weld fumes processing unit |
| CN109200802A (en) * | 2018-11-28 | 2019-01-15 | 佛山科学技术学院 | A kind of Furniture Factory VOC purifying processing device |
| CN110947257A (en) * | 2019-12-20 | 2020-04-03 | 南京木禾环境科技有限公司 | High-efficient compound movable organic volatile gas treatment facility |
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Application publication date: 20210907 |