CN102553414A - Method for recycling volatile solvent in varnished wire production - Google Patents
Method for recycling volatile solvent in varnished wire production Download PDFInfo
- Publication number
- CN102553414A CN102553414A CN2011104392535A CN201110439253A CN102553414A CN 102553414 A CN102553414 A CN 102553414A CN 2011104392535 A CN2011104392535 A CN 2011104392535A CN 201110439253 A CN201110439253 A CN 201110439253A CN 102553414 A CN102553414 A CN 102553414A
- Authority
- CN
- China
- Prior art keywords
- mineral oil
- xylenes
- white mineral
- waste gas
- cresols
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 14
- 239000002904 solvent Substances 0.000 title claims abstract description 11
- 238000004064 recycling Methods 0.000 title abstract description 8
- 239000008096 xylene Substances 0.000 claims abstract description 29
- 239000002480 mineral oil Substances 0.000 claims abstract description 17
- 235000010446 mineral oil Nutrition 0.000 claims abstract description 17
- 239000007789 gas Substances 0.000 claims abstract description 16
- 238000001704 evaporation Methods 0.000 claims abstract description 14
- 239000002912 waste gas Substances 0.000 claims abstract description 14
- 230000008020 evaporation Effects 0.000 claims abstract description 13
- 239000010409 thin film Substances 0.000 claims abstract description 13
- 230000002745 absorbent Effects 0.000 claims abstract description 10
- 239000002250 absorbent Substances 0.000 claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000003960 organic solvent Substances 0.000 claims abstract description 5
- 238000010521 absorption reaction Methods 0.000 claims abstract description 4
- 150000003738 xylenes Chemical class 0.000 claims description 25
- 150000001896 cresols Chemical class 0.000 claims description 23
- 238000009833 condensation Methods 0.000 claims description 9
- 230000005494 condensation Effects 0.000 claims description 9
- 210000003298 dental enamel Anatomy 0.000 claims description 8
- 238000011084 recovery Methods 0.000 claims description 8
- 239000002826 coolant Substances 0.000 claims description 2
- IWDCLRJOBJJRNH-UHFFFAOYSA-N p-cresol Chemical compound CC1=CC=C(O)C=C1 IWDCLRJOBJJRNH-UHFFFAOYSA-N 0.000 claims description 2
- 238000001816 cooling Methods 0.000 abstract description 6
- QTWJRLJHJPIABL-UHFFFAOYSA-N 2-methylphenol;3-methylphenol;4-methylphenol Chemical compound CC1=CC=C(O)C=C1.CC1=CC=CC(O)=C1.CC1=CC=CC=C1O QTWJRLJHJPIABL-UHFFFAOYSA-N 0.000 abstract 4
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 abstract 4
- 229930003836 cresol Natural products 0.000 abstract 4
- 230000001172 regenerating effect Effects 0.000 abstract 1
- 238000009835 boiling Methods 0.000 description 5
- 229910052799 carbon Inorganic materials 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- 238000007084 catalytic combustion reaction Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000004922 lacquer Substances 0.000 description 2
- 241000606750 Actinobacillus Species 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000001723 curing Methods 0.000 description 1
- 239000003085 diluting agent Substances 0.000 description 1
- 238000004534 enameling Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 239000002574 poison Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
Landscapes
- Treating Waste Gases (AREA)
Abstract
The invention discloses a method for recycling volatile solvent in varnished wire production, which comprises the steps of cooling waste gas exhausted from the top of a varnishing machine firstly by utilizing air as cooling media through countercurrent flow; further condensing the waste gas precooled by the air through water; selecting organic solvent white mineral oil with excellent dissolubility to cresol and xylene as an absorbent to absorb the remained uncondensed cresol and xylene gas which are contained in the waste gas precooled by the air and condensed through the water in a cycle mode; and after the white mineral oil performs cycle absorption for twenty to thirty days, regenerating the absorbent white mineral oil through thin film evaporation, processing the xylene and the cresol simultaneously, and secondarily recycling the cresol and the xylene.
Description
Technical field
The invention belongs to exhaust gas treatment technology, what relate to is a kind of process gas treatment process, particularly a kind of to treatment of waste gas method in the Production of Enamel Wires process.
Background technology
Enamel-covered wire is outside the copper conductor that has been drawn into, to be coated with corresponding lacquer solution, again through solvent evaporates and film curing, cooling and process.Production is accomplished by enamelling machine.Enamelling machine cures cooling device by actinobacillus device, take-up, annealing device, japanning and switch board five major parts are formed.Wherein the important component part that cooling device is an enamelling machine is cured in japanning, and it is divided into painting booth, baker and cooling frame three parts again and constitutes.
Tradition enamelling technique flow process: unwrapping wire-anneal-paint-bake and bank up with earth-cool off-take-up.
In the process of curing, the diluent cresols in the polyester lacquer, xylenes volatilization get into atmosphere, serious environment pollution.At present, the enamel-covered wire corporate boss will adopt Production by Catalytic Combustion Process to handle these waste gas that produce in the enameling furnace.
Summary of the invention
Though Production by Catalytic Combustion Process exhaust gas treatment technology environmental benefit is better, catalyst is prone to poison, and cost is higher, and volatile solvent can not be recycled, and causes the wasting of resources.The present invention is intended to develop volatile solvent recycling new method in a kind of Production of Enamel Wires.
The objective of the invention is to propose a kind of Production of Enamel Wires exhaust-gas treatment new method, recycle the volatile solvent in the Production of Enamel Wires on the one hand, make process gas obtain handling on the other hand, avoid environmental pollution.
Realize the technical scheme of above-mentioned purpose:
Reclaim xylenes and cresols through air precooling and water condensation, organic solvent absorption, thin film evaporation and active carbon adsorption.
(1) air precooling and water condensation
Evaporating the solvent that in the Production of Enamel Wires is cresols (191 ℃ of boiling points) and xylenes (138.4 ℃ of boiling points), and boiling point is higher, and its steam is prone to condensation.The EGT that discharge at the enamelling machine top is about 500 ℃, at first it is cooled off as cooling medium, countercurrent flow with air, can the EGT that contain cresols and xylenes be reduced to 250～300 ℃.The evaporator section that heated air directly feeds enamelling machine after the heat exchange is used for japanning and cures, and alternative part electrical heating is recycled heat in a large number.The further water of waste gas behind air precooling carries out condensation, can temperature be reduced to about 35～45 ℃, because the boiling point of cresols and xylenes is all than higher, in this process, 92%～95% cresols and xylenes gas will be condensed and obtain reclaiming.
(2) organic solvent absorbs
Still contain the part cresols and the xylenes gas that are not condensed in the waste gas after air precooling and water-cooled, selection paracresol and xylenes have fabulous deliquescent organic solvent White Mineral Oil (342 ℃ of boiling points) as absorbent to its absorption that circulates.
(3) thin film evaporation
After White Mineral Oil circulation absorbs 20～30 days, adopt thin film evaporation can the absorbent White Mineral Oil be regenerated, manage out xylenes and cresols, secondary recovery cresols and xylenes with the time-division.
(4) active carbon adsorption
Cresols is closely micro-with xylenes in the tail gas after absorb handling, but this tail gas is passed through qualified discharge behind the active carbon adsorption device again.
The inventive method has fundamentally solved the exhaust emission problem of Production of Enamel Wires process, and has realized the recycling of volatile solvent cresols, xylenes, meets energy-saving and emission-reduction, recycling economy requirement that country proposes.The application of the inventive method not only can realize the recycling of volatile solvent cresols, xylenes, has practiced thrift valuable resource, reaches the purpose of recycling economy, green production, and can realize the tail gas qualified discharge, prevents to pollute the protection environment.
The specific embodiment
Below in conjunction with specific embodiment, the present invention is elaborated.
Embodiment 1
Waste gas behind air precooling to 250 ℃, water condensation to 35 ℃, cresols and xylenes gas will be condensed and obtain reclaiming.At normal temperatures, residual air adopts thin film evaporation that the absorbent White Mineral Oil is regenerated after the White Mineral Oil circulation absorbs 20～30 days, can reclaim cresols and xylenes simultaneously.The condition of thin film evaporation is: 160 ℃ of temperature, and pressure 0.8atm, overall recovery can reach 99.6%.
Embodiment 2
Waste gas behind air precooling to 250 ℃, water condensation to 45 ℃, cresols and xylenes gas will be condensed and obtain reclaiming.At normal temperatures, residual air adopts thin film evaporation that the absorbent White Mineral Oil is regenerated after the White Mineral Oil circulation absorbs 20～30 days, can reclaim cresols and xylenes simultaneously.The condition of thin film evaporation is: 160 ℃ of temperature, and pressure 0.8atm, overall recovery can reach 98.8%.
Embodiment 3
Waste gas behind air precooling to 300 ℃, water condensation to 40 ℃, cresols and xylenes gas will be condensed and obtain reclaiming.At normal temperatures, residual air adopts thin film evaporation that the absorbent White Mineral Oil is regenerated after the White Mineral Oil circulation absorbs 20～30 days, can reclaim cresols and xylenes simultaneously.The condition of thin film evaporation is: 160 ℃ of temperature, and pressure 0.8atm, overall recovery can reach 99.2%.
Embodiment 4
Waste gas behind air precooling to 300 ℃, water condensation to 45 ℃, cresols and xylenes gas will be condensed and obtain reclaiming.At normal temperatures, residual air adopts thin film evaporation that the absorbent White Mineral Oil is regenerated after the White Mineral Oil circulation absorbs 20～30 days, can reclaim cresols and xylenes simultaneously.The condition of thin film evaporation is: 160 ℃ of temperature, and pressure 0.8atm, overall recovery can reach 98.5%.
Should be understood that, concerning those of ordinary skills, can improve or conversion, and all these improvement and conversion all should belong to the protection domain of accompanying claims of the present invention according to above-mentioned explanation.
Claims (1)
1. volatile solvent recovery method in the Production of Enamel Wires is characterized in that, may further comprise the steps: the waste gas that discharge at the enamelling machine top, at first cool off it as cooling medium, countercurrent flow with air; The further water of waste gas behind air precooling carries out condensation; Still contain the part cresols and the xylenes gas that are not condensed in the waste gas after air precooling and water-cooled, selection paracresol and xylenes have fabulous deliquescent organic solvent White Mineral Oil as absorbent to its absorption that circulates; After White Mineral Oil circulation absorbs 20～30 days, adopt thin film evaporation can the absorbent White Mineral Oil be regenerated, manage out xylenes and cresols, secondary recovery cresols and xylenes with the time-division.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104392535A CN102553414A (en) | 2011-12-26 | 2011-12-26 | Method for recycling volatile solvent in varnished wire production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104392535A CN102553414A (en) | 2011-12-26 | 2011-12-26 | Method for recycling volatile solvent in varnished wire production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102553414A true CN102553414A (en) | 2012-07-11 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011104392535A Pending CN102553414A (en) | 2011-12-26 | 2011-12-26 | Method for recycling volatile solvent in varnished wire production |
Country Status (1)
| Country | Link |
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| CN (1) | CN102553414A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109935428A (en) * | 2017-12-18 | 2019-06-25 | 日立金属株式会社 | The method for recovering solvents and recyclable device and enameled wire manufacturing method of enameled wire coating |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5472576A (en) * | 1990-08-22 | 1995-12-05 | Berberi; Anwar E. | Process for the recovery of industrial solvents and diluents from industrial waste |
| CN2589055Y (en) * | 2002-12-25 | 2003-12-03 | 何培鎏 | Lacquering exhaust gas purification processing apparatus |
| CN101337134A (en) * | 2008-08-07 | 2009-01-07 | 韩富生 | Recovery method and device of enamelling technique tail-gas |
-
2011
- 2011-12-26 CN CN2011104392535A patent/CN102553414A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5472576A (en) * | 1990-08-22 | 1995-12-05 | Berberi; Anwar E. | Process for the recovery of industrial solvents and diluents from industrial waste |
| CN2589055Y (en) * | 2002-12-25 | 2003-12-03 | 何培鎏 | Lacquering exhaust gas purification processing apparatus |
| CN101337134A (en) * | 2008-08-07 | 2009-01-07 | 韩富生 | Recovery method and device of enamelling technique tail-gas |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109935428A (en) * | 2017-12-18 | 2019-06-25 | 日立金属株式会社 | The method for recovering solvents and recyclable device and enameled wire manufacturing method of enameled wire coating |
| CN109935428B (en) * | 2017-12-18 | 2021-11-09 | 日立金属株式会社 | Method and device for recovering solvent of enameled wire coating and enameled wire manufacturing method |
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Application publication date: 20120711 |