CN110540846A - thermal cracking harmless treatment technology for waste oil ink residue of printed circuit board - Google Patents
thermal cracking harmless treatment technology for waste oil ink residue of printed circuit board Download PDFInfo
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- CN110540846A CN110540846A CN201910842035.2A CN201910842035A CN110540846A CN 110540846 A CN110540846 A CN 110540846A CN 201910842035 A CN201910842035 A CN 201910842035A CN 110540846 A CN110540846 A CN 110540846A
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- Prior art keywords
- thermal cracking
- waste
- oil ink
- waste oil
- ink residue
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/06—Combustion residues, e.g. purification products of smoke, fumes or exhaust gases
- C04B18/10—Burned or pyrolised refuse
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
- C10B57/08—Non-mechanical pretreatment of the charge, e.g. desulfurization
- C10B57/10—Drying
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Structural Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Civil Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
the invention provides a thermal cracking harmless treatment technology of waste oil ink residue of a printed circuit board, which comprises the following steps: drying the waste oil ink residue; carrying out thermal cracking on the dried waste oil ink residue; separating the thermal cracking products. The invention has simple and rapid technical process and good treatment effect, and can not cause harmful influence on the environment.
Description
Technical Field
The invention belongs to the field of environmental protection treatment, and particularly relates to a thermal cracking harmless treatment technology for waste oil ink residues of printed circuit boards.
Background
Printed circuit boards (i.e., PCBs) are important electronic components as support for electronic components and as carriers for electrical connections to electronic components. With the popularization and development of electronic products, the application of global PCBs is very wide. The PCB ink refers to ink adopted in PCB manufacturing, and is an important ring in manufacturing PCB boards. PCB ink usually consists of resin base material, functional assistant, filler and other parts, and is mostly single-component ink and double-component ink, and three-component ink also exists.
according to statistics, in 2016, the market demand of the PCB special ink in continental areas of China only reaches 10 ten thousand tons, and is increased by 20% every year, in 2018, the market demand of the PCB special ink reaches 15 ten thousand tons, and waste oil ink residues generated by each ton of ink reach 4000 plus 5000 tons, and the untreated ink residues are added, so that the national waste oil ink residues reach more than 100 ten thousand tons, and are increased by 20% every year. How to safely and effectively treat the rapidly growing waste printed circuit boards is a great challenge for environmental protection in China.
The waste oil ink residues contain a large amount of water, acid, alkali, organic pigment, inorganic pigment and organic solvent, are typical complex systems, are randomly discharged without being properly treated, tend to pollute the ecological environment and harm the health of human beings, and need to be treated to realize resource utilization. The prior method for treating the waste oil ink residue mainly comprises the methods of physical crushing, burning, acid washing and the like. The physical crushing mode cannot change the chemical composition of the waste oil ink residue, and harmful components still pollute the environment; if the waste oil ink residue is burnt in an aerobic environment, organic matters in the waste oil ink residue are heated and decomposed, and polyhalogenated dioxin and polyhalogenated benzofuran substances are released, have strong carcinogenic effect, and cause damage to both organisms and the environment; a new chemical substance is introduced in the acid washing mode, so that the treatment complexity is increased, and a new reactant is introduced, so that the components of the treated product are more complex, and more waste gas and waste liquid are generated;
Thermal cracking generally refers to the process of heating materials in an oxygen-free or low oxygen environment to cause molecular decomposition to produce coke, condensable liquids, and gaseous products. Compared with the aerobic incineration mode, the thermal cracking reaction is carried out in a closed system, no oxygen participates in the reaction, and carcinogenic gases such as toxic dioxin and the like are hardly generated in the whole recovery treatment process, so that the atmospheric pollution is small, and therefore the thermal cracking process is generally considered to be a solid waste recovery technology with wide application prospect.
Disclosure of Invention
The invention aims to solve the technical problems and provides a thermal cracking harmless treatment technology of waste oil ink residues of printed circuit boards, which has the advantages of simple process, good treatment effect and environmental friendliness.
In order to achieve the above object, the present invention provides the following technical solutions:
A thermal cracking innocent treatment technology for waste oil ink residue of printed circuit boards comprises the following steps:
step one, drying waste oil ink residues;
Step two, carrying out thermal cracking on the dried waste oil ink residue, wherein nitrogen is introduced in the thermal cracking process;
And step three, separating the thermal cracking products.
in a preferred embodiment, in the first step, the drying temperature is 100 ℃ to 150 ℃ and the time is at least 2 hours.
In a preferred embodiment, the thermal cracking is initiated at 350 ℃ and is ramped to 500 ℃ to 700 ℃, at a ramp rate of 10 ℃ to 20 ℃ per minute, with a nitrogen flow rate of 50 mL/minute to 100 mL/minute, and for a thermal cracking time of at least 6 hours.
In a preferred embodiment, in the third step, the thermal cracking product includes waste gas and waste residue.
In a preferred embodiment, in the third step, the waste gas in the thermal cracking product is cooled to room temperature to obtain oil and combustible gas. More preferably, said combustible gas is re-combusted to provide heat for said first step and said second step.
In a preferred embodiment, in the third step, the waste residue is subjected to sintering treatment. More preferably, the product after sintering treatment is mixed with construction waste, and a binder is added to prepare the building brick.
The thermal cracking harmless treatment technology for the waste oil ink residues of the printed circuit board can effectively inhibit the generation of carcinogenic substances such as dioxin, benzofuran and the like, realize the harmless treatment of the waste oil ink residues, obtain waste gas, waste oil and waste residues which can be recycled after the waste oil ink residues are treated by physical and chemical methods, wherein the waste residues can be mixed with construction wastes and added with an adhesive to prepare a new brick material for construction, and the waste gas is introduced into a system again to burn so as to supply heat to the system. The invention has simple and rapid technical process and good treatment effect, and can not cause harmful influence on the environment.
Drawings
FIG. 1 is a schematic flow chart of the thermal cracking innocent treatment technology of waste oil ink residue of printed circuit boards according to the invention.
Detailed Description
the present invention will be further described with reference to the following examples. It should be understood that the following examples are illustrative of the present invention only, and are not intended to limit the scope of the present invention.
Example 1
The waste oil ink residue generated in the manufacturing process of the printed circuit board in the PCB factory is randomly sampled by 100g, and the determination shows that the water content of the ink residue is as high as 56.3 percent, wherein organic substances (including resin, photosensitizer, polyester compound and the like) are 11.1 percent, and inorganic substances (talcum powder, silicon dioxide and the like) are also contained.
As shown in fig. 1, the above waste oil ink residue samples were dried by heating them to 100 ℃ in an oven for at least 2 hours. And then placing the dried waste oil ink residue into a thermal cracking reactor 2, introducing nitrogen at the flow rate of 50 mL/min, wherein the thermal cracking initial temperature is 350 ℃, heating to 500 ℃, the heating rate is 10 ℃/min, and the thermal cracking reaction time lasts at least 6 hours. After the reaction is finished, waste residue left in the thermal cracking reactor 2 and discharged waste gas are obtained, and the discharged waste gas is cooled by a condenser 3 and then is collected to obtain oil and uncondensed combustible gas. The thermal cracking reactor 2 is connected with a temperature controller 1.
The cracking rate was 95.6%. The thermal cracking products include waste gases, waste residues and oils. Wherein, through analysis and identification, the waste residue in the thermal cracking reactor 2 mainly contains inorganic substances such As heavy metal, copper, tin, glass fiber, etc., Pb 21.20mg/Kg, Cd 0.514mg/Kg, Hg is not detected, As 0.894mg/Kg, Cr 4.64mg/Kg, Cu 1.07 x 103mg/Kg, it can be known through comparing with soil environment quality standard, except copper, all reach the heavy metal discharge standard of the national natural soil, on this basis, the heavy metal can further take measures, further reduce its content, can make the heavy metal particle harmless after sintering treatment (such As unit system sintering, multiple system solid phase sintering, multiple system liquid phase sintering, continuous sintering, intermittent sintering, etc.), discharge to the environment again, or mix with construction waste, add the binder, make into the new building brick material. The uncondensed combustible gas can be collected in the gas collecting tank or directly fed into the system again for combustion to supply heat for the system, so that the cyclic utilization is realized. The oily matter mainly contains phenol, bisphenol A, isopropylphenol, alkylphenol, phenyl propenyl ester, tri-p-hydroxyphenyl ethane and other substances, and can be further processed by chemical engineering to obtain a new product which can be economically utilized.
Example 2
The waste oil ink residue generated in the manufacturing process of the printed circuit board in the PCB factory is randomly sampled by 100g, and the determination shows that the water content of the ink residue is as high as 56.3 percent, wherein organic substances (including resin, photosensitizer, polyester compound and the like) are 11.1 percent, and inorganic substances (talcum powder, silicon dioxide and the like) are also contained.
The above waste oil ink residue samples were heated in oven 1 to 150 ℃ for at least 2 hours to dry. And then placing the dried waste oil ink residue into a thermal cracking reactor 2, introducing nitrogen at the flow rate of 100 mL/min, wherein the thermal cracking starting temperature is 300 ℃, the temperature is raised to 700 ℃, the temperature raising rate is 20 ℃/min, and the thermal cracking reaction time lasts at least 6 hours. After the reaction is finished, waste residue left in the thermal cracking reactor 2 and discharged waste gas are obtained, and the discharged waste gas is cooled by a condenser and then is collected to obtain oil and uncondensed combustible gas.
The cracking rate was 96.3%. The thermal cracking products include waste gases, waste residues and oils. Wherein, through analysis and identification, the waste residue in the thermal cracking reactor 2 mainly contains inorganic substances such as heavy metal, copper, tin, glass fiber, etc., Pb28.30mg/Kg, Cd 0.694mg/Kg, Hg is not detected, As1.61mg/Kg, Cr5.05mg/Kg, Cu1.23 × 103mg/Kg, it can be known by comparing with soil environment quality standard that all reach the heavy metal discharge standard of national natural soil except copper, on this basis, the heavy metal can further take measures to further reduce its content, can granulate the heavy metal harmless after sintering treatment (such as unit system sintering, multi-system solid phase sintering, multi-system liquid phase sintering, continuous sintering, intermittent sintering, etc.), and discharge to the environment, or mix with construction waste, and add binder, make into new building brick material. The uncondensed combustible gas can be collected in the gas collecting tank or directly fed into the system again for combustion to supply heat for the system, so that the cyclic utilization is realized. The oily matter mainly contains phenol, bisphenol A, isopropylphenol, alkylphenol, phenyl propenyl ester, tri-p-hydroxyphenyl ethane and other substances, and can be further processed by chemical engineering to obtain a new product which can be economically utilized.
Example 3
The waste oil ink residue generated in the manufacturing process of the printed circuit board in the PCB factory is randomly sampled by 100g, and the determination shows that the water content of the ink residue is as high as 56.3 percent, wherein organic substances (including resin, photosensitizer, polyester compound and the like) are 11.1 percent, and inorganic substances (talcum powder, silicon dioxide and the like) are also contained.
the above waste oil ink residue samples were heated in oven 1 to 120 ℃ for at least 2 hours to dry. And then placing the dried waste oil ink residue into a thermal cracking reactor 2, introducing nitrogen at the flow rate of 80 mL/min, wherein the thermal cracking starting temperature is 300 ℃, the temperature is raised to 600 ℃, the temperature raising rate is 15 ℃/min, and the thermal cracking reaction time lasts at least 6 hours. After the reaction is finished, waste residue left in the thermal cracking reactor 2 and discharged waste gas are obtained, and the discharged waste gas is cooled by a condenser and then is collected to obtain oil and uncondensed combustible gas.
The cracking rate was 97.9%. The thermal cracking products include waste gases, waste residues and oils. Wherein, through analysis and identification, the waste residue in the thermal cracking reactor 2 mainly contains inorganic substances such As heavy metal, copper, tin, glass fiber, etc., Pb26.30mg/Kg, Cd 0.688mg/Kg, Hg is not detected, As 1.53mg/Kg, Cr 4.69mg/Kg, Cu 1.01 x 103mg/Kg, compared with the soil environment quality standard, except copper, all reach the national natural soil heavy metal discharge standard, on this basis, the heavy metal can further take measures to further reduce the content thereof, can granulate the heavy metal harmless after sintering treatment (such As unit system sintering, multi-system solid phase sintering, multi-system liquid phase sintering, continuous sintering, intermittent sintering, etc.), and then discharge to the environment, or mix with building waste, and add adhesive to prepare new building brick material. The uncondensed combustible gas can be collected in the gas collecting tank or directly fed into the system again for combustion to supply heat for the system, so that the cyclic utilization is realized. The oily matter mainly contains phenol, bisphenol A, isopropylphenol, alkylphenol, phenyl propenyl ester, tri-p-hydroxyphenyl ethane and other substances, and can be further processed by chemical engineering to obtain a new product which can be economically utilized.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the technical principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.
Claims (8)
1. A thermal cracking innocent treatment technology for waste oil ink residue of printed circuit boards is characterized by comprising the following steps:
Step one, drying waste oil ink residues;
Step two, carrying out thermal cracking on the dried waste oil ink residue, wherein nitrogen is introduced in the thermal cracking process;
And step three, separating the thermal cracking products.
2. The technique of claim 1, wherein in step one, the drying is carried out at a temperature of 100 ℃ to 150 ℃ for a period of at least 2 hours.
3. The technique of claim 1, wherein in step two, the starting temperature of thermal cracking is 350 ℃, the temperature is raised to 500-700 ℃, the temperature raising rate is 10-20 ℃/min, the flow rate of nitrogen is 50-100 mL/min, and the time of thermal cracking is at least 6 hours.
4. The technique of claim 1 wherein in step three, the thermally cracked product comprises waste gases and waste residues.
5. The technique as claimed in claim 4, wherein in the third step, the waste gas in the thermal cracking product is cooled to room temperature to obtain oil and combustible gas.
6. A technique according to claim 5, wherein in step three the combustible gas is re-combusted to provide heat for step one and step two.
7. The technique as claimed in claim 4, wherein in the third step, the waste residue is subjected to sintering treatment.
8. the technology of claim 7, wherein in the third step, the product after sintering treatment is mixed with construction waste, and a binder is added to prepare the building brick.
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| CN201910842035.2A CN110540846A (en) | 2019-09-06 | 2019-09-06 | thermal cracking harmless treatment technology for waste oil ink residue of printed circuit board |
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| CN201910842035.2A CN110540846A (en) | 2019-09-06 | 2019-09-06 | thermal cracking harmless treatment technology for waste oil ink residue of printed circuit board |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080179257A1 (en) * | 2007-01-25 | 2008-07-31 | Stephen Clarke | Process for the Thermal Treatment of Pharmaceutical Waste Material |
| CN106747496A (en) * | 2016-11-29 | 2017-05-31 | 昆山顶牛市政建设有限公司 | A kind of light-weight refractory type building brick and preparation method thereof |
| CN106944457A (en) * | 2017-03-13 | 2017-07-14 | 惠州市惠阳区力行环保有限公司 | A kind of waste oil ink residue recovery and treatment method efficiently, environmentally friendly |
| CN107760338A (en) * | 2017-10-24 | 2018-03-06 | 江门绿润环保科技有限公司 | A kind of pyrolysis processing technique of organic solid castoff |
| CN108165287A (en) * | 2018-02-02 | 2018-06-15 | 深圳新能极科技有限公司 | A kind of viscosity rubbish anaerobic thermal-cracking method and system |
| CN109455990A (en) * | 2018-12-20 | 2019-03-12 | 贵州安凯达实业股份有限公司 | It is a kind of to recycle construction refuse regenerated water-permeable brick and preparation method thereof |
-
2019
- 2019-09-06 CN CN201910842035.2A patent/CN110540846A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080179257A1 (en) * | 2007-01-25 | 2008-07-31 | Stephen Clarke | Process for the Thermal Treatment of Pharmaceutical Waste Material |
| CN106747496A (en) * | 2016-11-29 | 2017-05-31 | 昆山顶牛市政建设有限公司 | A kind of light-weight refractory type building brick and preparation method thereof |
| CN106944457A (en) * | 2017-03-13 | 2017-07-14 | 惠州市惠阳区力行环保有限公司 | A kind of waste oil ink residue recovery and treatment method efficiently, environmentally friendly |
| CN107760338A (en) * | 2017-10-24 | 2018-03-06 | 江门绿润环保科技有限公司 | A kind of pyrolysis processing technique of organic solid castoff |
| CN108165287A (en) * | 2018-02-02 | 2018-06-15 | 深圳新能极科技有限公司 | A kind of viscosity rubbish anaerobic thermal-cracking method and system |
| CN109455990A (en) * | 2018-12-20 | 2019-03-12 | 贵州安凯达实业股份有限公司 | It is a kind of to recycle construction refuse regenerated water-permeable brick and preparation method thereof |
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Application publication date: 20191206 |