CN110565359A - recycling method of waste copper and nickel wastewater filter medium - Google Patents
recycling method of waste copper and nickel wastewater filter medium Download PDFInfo
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- CN110565359A CN110565359A CN201910848486.7A CN201910848486A CN110565359A CN 110565359 A CN110565359 A CN 110565359A CN 201910848486 A CN201910848486 A CN 201910848486A CN 110565359 A CN110565359 A CN 110565359A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
- B29B17/02—Separating plastics from other materials
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
- B29B17/04—Disintegrating plastics, e.g. by milling
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
- D06M11/07—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with halogens; with halogen acids or salts thereof; with oxides or oxyacids of halogens or salts thereof
- D06M11/11—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with halogens; with halogen acids or salts thereof; with oxides or oxyacids of halogens or salts thereof with halogen acids or salts thereof
- D06M11/13—Ammonium halides or halides of elements of Groups 1 or 11 of the Periodic System
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
- D06M11/32—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond
- D06M11/36—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond with oxides, hydroxides or mixed oxides; with salts derived from anions with an amphoteric element-oxygen bond
- D06M11/38—Oxides or hydroxides of elements of Groups 1 or 11 of the Periodic System
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
- D06M11/51—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with sulfur, selenium, tellurium, polonium or compounds thereof
- D06M11/55—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with sulfur, selenium, tellurium, polonium or compounds thereof with sulfur trioxide; with sulfuric acid or thiosulfuric acid or their salts
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
- D06M2101/02—Natural fibres, other than mineral fibres
- D06M2101/04—Vegetal fibres
- D06M2101/06—Vegetal fibres cellulosic
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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
- Y02W30/52—Mechanical processing of waste for the recovery of materials, e.g. crushing, shredding, separation or disassembly
-
- 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
- Y02W30/62—Plastics recycling; Rubber recycling
Abstract
the invention relates to a filter medium recycling method of HW49, in particular to a recycling method of waste copper and nickel wastewater filter media, which comprises the steps of crushing, acid washing, alkali washing, water washing and the like, wherein the PP cotton threads crushed and separated from the waste filter media are dissolved out of copper ions, nickel ions, iron ions, zinc ions and the like in the PP cotton threads through 3M mixed acid and dilute sulfuric acid, the dissolved iron salt is easy to form hydroxide during alkali washing and is removed by precipitation, and finally, the PP cotton threads with higher value than that of common PP plastic flake particles are obtained after water washing and can be reused.
Description
Technical Field
The invention relates to a method for recycling a filter medium of HW49, in particular to a method for recycling a filter medium of waste copper and nickel wastewater.
Background
According to the national records of hazardous waste (2016 edition), other HW49 wastes are from the industries of graphite and other non-metallic mineral products manufacturing and the like, and mainly comprise silicon trichloride and silicon tetrachloride which are wasted in the production process of polycrystalline silicon; waste activated carbon generated in the production process of the chemical industry; dust collected by a dust collecting (removing) device in the production process of the inorganic chemical industry; a waste packing container containing or infected with toxic and infectious hazardous wastes, a filtering and adsorbing medium; and waste lead storage batteries, cadmium-nickel batteries, mercury oxide batteries, mercury switches, fluorescent powder, cathode ray tubes and the like. The production process of PCB manufacture and electroplating industry can generate various waste water containing heavy metal ions, some waste water can be recycled after microfiltration and ultrafiltration, but a filter medium needs to be replaced after being used for a period of time, the 2016 edition of national hazardous waste lists the waste in 900-041-49 of HW49, the existing treatment method is generally incineration, although the method is a feasible method for treating hazardous waste, the available resources in the hazardous waste are all ash, and the method is not in accordance with the new environment protection situation of promoting material regeneration.
Disclosure of Invention
in order to solve the problems, the invention provides a method for recycling waste copper and nickel wastewater filter media, which comprises the steps of crushing, acid washing, alkali washing, water washing and the like, wherein PP cotton threads crushed and separated from the waste filter media are subjected to 3M mixed acid and dilute sulfuric acid to dissolve copper ions, nickel ions, iron ions, zinc ions and the like in the PP cotton threads, dissolved iron salts are easy to form hydroxides during alkali washing and are removed by precipitation, and finally, the PP cotton threads with higher value than common PP plastic flake particles are obtained after water washing and can be put into use again.
The invention provides a method for recycling waste copper and nickel wastewater filter media for solving the problems, which comprises the following steps:
Step one, crushing and sorting; crushing the recovered filter medium into small sections of cotton threads and plastic skeleton fragments by a crushing and cutting machine, and sorting out PP cotton threads;
step two, mixed acid soaking; soaking PP cotton thread in 3M mixed acid for 2.5-3.5 h, taking out, draining, and heating with steam to maintain the temperature of the 3M mixed acid at 75-95 deg.C;
step three, acid washing; transferring the PP cotton threads soaked by the mixed acid into a first water kneading machine, and washing for 40-60min by using 8-13% sulfuric acid solution;
Step four, soaking in sulfuric acid; completely soaking the pickled PP cotton thread in 8-13% sulfuric acid solution for 2.5-3.5 h, taking out and draining, and heating the sulfuric acid solution to 50-80 ℃ by steam;
step five, alkali washing; transferring the PP cotton threads soaked by the sulfuric acid into a second water kneading machine, washing for 40-60min by using 0.7-0.8M NaOH solution, and taking out;
step six, soaking by NaOH; putting the PP cotton threads subjected to alkali washing into 0.7-0.8M NaOH solution, soaking for 1h, taking out, draining, heating the NaOH solution to 60-80 ℃ through steam, and turning over the PP cotton threads for 2 times;
step seven, washing with water; transferring the PP cotton threads soaked by the NaOH into a third water kneading machine, washing for 40-60min by using clear water, and taking out;
Step eight, dehydrating and bagging; transferring the washed PP cotton thread to a dehydrator, centrifugally dehydrating for 10-20min, drying, and bagging and packaging.
As a further scheme of the method for recycling the waste copper and nickel wastewater filter medium, the washing water recycling step six in the step seven is used for preparing a NaOH solution, the soak solution recycling step five in the step six is used for preparing an alkaline washing solution, the alkaline washing solution recycling step four in the step five is used for preparing a sulfuric acid solution, the soak solution recycling step three in the step four is used for preparing a pickling solution, and the pickling solution recycling step two in the step three is used for preparing a 3M mixed acid.
As a further scheme of the method for recycling the waste copper and nickel wastewater filter medium, the 3M solution in the second step is prepared by mixing hydrochloric acid and sulfuric acid in a volume ratio of 3: 1.
as a further scheme of the method for recycling the waste copper and nickel wastewater filter medium, the PP cotton threads are turned over for multiple times in the processes of mixed acid soaking in the step two and sulfuric acid soaking in the step four so as to be fully contacted with the soaking solution.
as a further scheme of the method for recycling the waste copper and nickel wastewater filter medium, the PP cotton threads are turned over once every 10min in the second step and the fourth step.
Advantageous effects
1. the sorted waste PP cotton threads containing heavy metals are sequentially subjected to acid washing and alkali washing, and elements such as copper, nickel and the like contained in the PP cotton threads are dissolved into Cu by using mixed acid2+、Ni2+Dissolving the elements of iron, zinc and the like in the PP cotton yarn into Fe by using dilute sulfuric acid3+、Zn2+The metal ions are easy to generate precipitates from hydroxides during alkali washing, and are easy to precipitate and filter;
2. soaking PP cotton threads to be treated in a mixed acid solution for a period of time before pickling so as to improve the pickling effect; after alkali washing, soaking the mixture in NaOH solution for a period of time to fully precipitate metal ions in the solution;
3. the washing water generated by water washing in the method can be reused for NaOH soaking in the previous step, the NaOH soaking solution can be reused for NaOH alkaline washing in the previous step, the alkaline washing solution is reused for preparing the sulfuric acid solution in the previous step, the sulfuric acid solution can be reused for preparing the mixed acid, the water in the whole process is recycled in the reverse direction, and the water resource can be greatly saved.
Detailed Description
example 1
A method for recycling waste copper and nickel wastewater filter media comprises the following steps:
step one, crushing and sorting; crushing the recovered filter medium into small sections of cotton threads and plastic skeleton fragments by a crushing cutter, crushing the plastic skeleton fragments, and using the separated PP cotton threads for subsequent treatment;
step two, mixed acid soaking; soaking PP cotton threads in 3M mixed acid for 3 hours, fishing out and draining, mixing 3M acid soaking solution, namely hydrochloric acid and sulfuric acid with the volume ratio of 3:1 and the concentration of 10%, mixing, heating by steam during soaking to maintain the temperature of the 3M mixed acid at 85 ℃ so that metals such as copper, nickel and the like contained in the PP cotton threads react with the solution and exist in the solution in an ionic state, periodically turning over the PP cotton threads during soaking so that the PP cotton threads and the mixed acid are fully mixed, wherein the turning frequency is preferably once for 10 min;
step three, acid washing; transferring the PP cotton threads soaked in the mixed acid into a first water kneading machine, washing the PP cotton threads with a 10% sulfuric acid solution for 50min, continuously overturning and stirring the PP cotton threads under the drive of the first water kneading machine to ensure that metals such as iron, zinc and the like contained in the PP cotton threads are mixed with sulfuric acid to fully react, and then using Fe3+、Zn2+The plasma exists in the pickling solution;
step four, soaking in sulfuric acid; completely soaking the pickled PP cotton threads in a 10% sulfuric acid solution for 3 hours, taking out and draining, wherein the sulfuric acid solution is heated by steam to maintain 65 ℃ so as to fully perform the reaction, and periodically turning over the PP cotton threads during the sulfuric acid soaking period, preferably once for 10 min;
Step five, alkali washing; transferring the PP cotton threads soaked in the sulfuric acid into a second water kneading machine, washing for 50min by using 0.8M NaOH solution, taking out, and driving the PP cotton threads and the NaOH solution to be continuously overturned and stirred by the second water kneading machine to ensure that Fe contained in the PP cotton threads3+、Zn2+etc. react with NaOH to produce Fe (OH) which can be settled3、Zn(OH)2Etc.;
Step six, soaking by NaOH; putting the PP cotton threads subjected to alkali washing into a 0.8M NaOH solution, soaking for 1h, taking out and draining, heating the NaOH solution to 70 ℃ by steam during soaking, and periodically turning over the PP cotton threads for 2 times at the same time so as to enable metal ions contained in the PP cotton threads to fully react with hydroxide ions to generate precipitates;
step seven, washing with water; transferring the PP cotton threads soaked by the NaOH into a third water kneading machine, washing for 50min by clear water, and taking out;
Step eight, dehydrating and bagging; transferring the washed PP cotton thread to a dehydrator, centrifugally dehydrating for 10min, drying, and bagging and packaging.
the method comprises the steps of selecting PP cotton threads in the waste filter medium, soaking the PP cotton threads in self-prepared 3M mixed acid to enable elements such as copper, nickel and the like contained in the waste filter medium to react into an ionic state and to be stored in a solution, then washing and soaking the PP cotton threads by using sulfuric acid to enable elements such as iron, zinc and the like to react into an ionic state, enabling one part of the elements to be stored in the solution, enabling the part adhered to the PP cotton threads to be fully reacted and precipitated after being washed and soaked by using NaOH solution, fully washing the PP cotton threads when washing the PP cotton threads, and accordingly ensuring that the washed PP cotton threads meet the recycling requirements, and the washed PP cotton threads can be reused or bagged for sale after being centrifugally dehydrated and dried.
randomly extracting the dehydrated and dried PP cotton threads, pre-treating the PP cotton threads, measuring part of the PP cotton threads to perform halogen test, wherein the operation process is as follows: burning in oxygen-containing closed equipment, collecting combustion products, filtering and screening the combustion products, adopting ion chromatography or other necessary detection instruments for auxiliary confirmation, and finally performing IC analysis to obtain no fluorine, chlorine, bromine and iodine; and then measuring part of PP cotton threads for element test, wherein the process is as follows: carrying out nitric acid hydrolysis, filtering, detecting by using an electron coupled plasma emission spectrometer or an atomic absorption spectrometer, and determining the copper content to be 26mg/kg and the nickel content to be 0 through analysis, wherein the detection results meet the condition of recycling the PP cotton threads through multiple tests.
Example 2
a method for recycling waste copper and nickel wastewater filter media comprises the following steps:
Step one, crushing and sorting; crushing the recovered filter medium into small sections of cotton threads and plastic skeleton fragments by a crushing cutter, crushing the plastic skeleton fragments, and using the separated PP cotton threads for subsequent treatment;
Step two, mixed acid soaking; soaking PP cotton threads in 3M mixed acid for 2.5h, fishing out and draining, mixing 3M acid soaking solution, namely mixing hydrochloric acid and sulfuric acid with the volume ratio of 3:1 and the concentration of 13%, keeping the temperature of the 3M mixed acid at 95 ℃ by steam heating during soaking so that metals such as copper, nickel and the like contained in the PP cotton threads react with the solution and exist in the solution in an ionic state, periodically turning over the PP cotton threads during soaking so that the PP cotton threads and the mixed acid are fully mixed, wherein the turning frequency is preferably once for 10 min;
step three, acid washing; transferring the PP cotton threads soaked in the mixed acid into a first water kneading machine, washing the PP cotton threads with a 13% sulfuric acid solution for 40min, continuously overturning and stirring the PP cotton threads under the drive of the first water kneading machine to ensure that metals such as iron, zinc and the like contained in the PP cotton threads are mixed with sulfuric acid to fully react, and then using Fe3+、Zn2+The plasma exists in the pickling solution;
step four, soaking in sulfuric acid; completely soaking the pickled PP cotton threads in a 13% sulfuric acid solution for 2.5h, taking out and draining, wherein the sulfuric acid solution is heated by steam to maintain 65 ℃ so as to fully perform the reaction, and periodically turning over the PP cotton threads during the sulfuric acid soaking period, wherein the preferred time is 10 min;
Step five, alkali washing; transferring the PP cotton threads soaked in the sulfuric acid into a second water kneading machine, washing the PP cotton threads with 0.8M NaOH solution for 40min, taking out the PP cotton threads, and driving the PP cotton threads and the NaOH solution to be continuously overturned and stirred by the second water kneading machine to ensure that Fe contained in the PP cotton threads3+、Zn2+etc. react with NaOH to produce Fe (OH) which can be settled3、Zn(OH)2Etc.;
Step six, soaking by NaOH; putting the PP cotton threads subjected to alkali washing into a 0.8M NaOH solution, soaking for 1h, taking out and draining, heating the NaOH solution to 80 ℃ by steam during soaking, and periodically turning over the PP cotton threads for 2 times at the same time so as to enable metal ions contained in the PP cotton threads to fully react with hydroxide ions to generate precipitates;
step seven, washing with water; transferring the PP cotton threads soaked by the NaOH into a third water kneading machine, washing for 40min by using clear water, and taking out;
Step eight, dehydrating and bagging; transferring the washed PP cotton thread to a dehydrator, centrifugally dehydrating for 10min, drying, and bagging and packaging.
example 3
A method for recycling waste copper and nickel wastewater filter media comprises the following steps:
Step one, crushing and sorting; crushing the recovered filter medium into small sections of cotton threads and plastic skeleton fragments by a crushing cutter, crushing the plastic skeleton fragments, and using the separated PP cotton threads for subsequent treatment;
step two, mixed acid soaking; soaking PP cotton threads in 3M mixed acid for 3.5h, taking out and draining, wherein the 3M mixed acid soaking solution is prepared by mixing hydrochloric acid and sulfuric acid with the volume ratio of 3:1 and the concentration of 8%, the temperature of the 3M mixed acid is maintained at 75 ℃ by steam heating during soaking, so that metals such as copper, nickel and the like contained in the PP cotton threads react with the solution and exist in the solution in an ionic state, the PP cotton threads are periodically turned over during soaking so that the PP cotton threads and the mixed acid are fully mixed, and the turning frequency is preferably once for 10 min;
Step three, acid washing; transferring the PP cotton threads soaked in the mixed acid into a first water kneading machine, washing for 60min by using 8% sulfuric acid solution, continuously overturning and stirring the PP cotton threads under the drive of the first water kneading machine to ensure that metals such as iron, zinc and the like contained in the PP cotton threads are mixed with sulfuric acid to fully react, and then using Fe3+、Zn2+The plasma exists in the pickling solution;
step four, soaking in sulfuric acid; completely soaking the pickled PP cotton threads in 8% sulfuric acid solution for 3.5h, taking out and draining, wherein the sulfuric acid solution is heated by steam to maintain 80 ℃ so as to fully perform the reaction, and periodically turning over the PP cotton threads during the sulfuric acid soaking period, wherein the preferred time is 10 min;
step five, alkali washing; transferring the PP cotton threads soaked in the sulfuric acid into a second water kneading machine, washing for 60min by using 0.7M NaOH solution, taking out, and driving the PP cotton threads and the NaOH solution to be continuously overturned and stirred by the second water kneading machine to ensure that Fe contained in the PP cotton threads3+、Zn2+etc. react with NaOH to produce Fe (OH) which can be settled3、Zn(OH)2Etc.;
Step six, soaking by NaOH; putting the PP cotton threads subjected to alkali washing into a 0.8M NaOH solution, soaking for 1h, taking out and draining, heating the NaOH solution to 620 ℃ through steam during soaking, and periodically turning over the PP cotton threads for 2 times at the same time so as to enable metal ions contained in the PP cotton threads to fully react with hydroxide ions to generate precipitates;
Step seven, washing with water; transferring the PP cotton threads soaked by the NaOH into a third water kneading machine, washing for 60min by using clear water, and taking out;
Step eight, dehydrating and bagging; transferring the washed PP cotton thread to a dehydrator, centrifugally dehydrating for 20min, drying, and bagging and packaging.
In the embodiment 1, the embodiment 2 and the embodiment 3, the washing water recyclable step six in the step seven is used for preparing a NaOH solution, the NaOH soaking solution recyclable step five in the step six is used as an alkali washing solution, the alkali washing solution recyclable step four in the step five is used for preparing a sulfuric acid solution and reacting and precipitating with part of metal ions contained in the sulfuric acid solution, the soaking solution in the step four is filtered to remove precipitates and then can be recycled as a pickling solution, the pickling solution recyclable step two in the step three is used for preparing 3M mixed acid, and water in the process is recycled along the reverse direction, so that water resources are greatly saved.
although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (5)
1. A method for recycling waste copper and nickel wastewater filter media is characterized by comprising the following steps: the method comprises the following steps:
step one, crushing and sorting; crushing the recovered filter medium into small sections of cotton threads and plastic skeleton fragments by a crushing and cutting machine, and sorting out PP cotton threads;
step two, mixed acid soaking; soaking PP cotton thread in 3M mixed acid for 2.5-3.5 h, taking out, draining, and heating with steam to maintain the temperature of the 3M mixed acid at 75-95 deg.C;
Step three, acid washing; transferring the PP cotton threads soaked by the mixed acid into a first water kneading machine, and washing for 40-60min by using 8-13% sulfuric acid solution;
Step four, soaking in sulfuric acid; completely soaking the pickled PP cotton thread in 8-13% sulfuric acid solution for 2.5-3.5 h, taking out and draining, and heating the sulfuric acid solution to 50-80 ℃ by steam;
Step five, alkali washing; transferring the PP cotton threads soaked by the sulfuric acid into a second water kneading machine, washing for 40-60min by using 0.7-0.8M NaOH solution, and taking out;
step six, soaking by NaOH; putting the PP cotton threads subjected to alkali washing into 0.7-0.8M NaOH solution, soaking for 1h, taking out, draining, heating the NaOH solution to 60-80 ℃ through steam, and turning over the PP cotton threads for 2 times;
step seven, washing with water; transferring the PP cotton threads soaked by the NaOH into a third water kneading machine, washing for 40-60min by using clear water, and taking out;
Step eight, dehydrating and bagging; transferring the washed PP cotton thread to a dehydrator, centrifugally dehydrating for 10-20min, drying, and bagging and packaging.
2. the method for recycling the waste copper and nickel wastewater filter medium as claimed in claim 1, wherein the method comprises the following steps: the sixth washing water recycling step in the seventh step is used for preparing a NaOH solution, the fifth soaking liquid recycling step in the sixth step is used as an alkaline washing liquid, the fourth alkaline washing liquid recycling step in the fifth step is used for preparing a sulfuric acid solution, the third soaking liquid recycling step in the fourth step is used as a pickling liquid, and the second pickling liquid recycling step in the third step is used for preparing 3M mixed acid.
3. The method for recycling the waste copper and nickel wastewater filter medium as claimed in claim 1, wherein the method comprises the following steps: and in the second step, the 3M solution is prepared by mixing hydrochloric acid and sulfuric acid in a volume ratio of 3: 1.
4. The method for recycling the waste copper and nickel wastewater filter medium as claimed in claim 1, wherein the method comprises the following steps: and turning over the PP cotton threads for multiple times in the processes of the mixed acid soaking in the second step and the sulfuric acid soaking in the fourth step to ensure that the PP cotton threads are fully contacted with the soaking solution.
5. the method for recycling the waste copper and nickel wastewater filter medium as claimed in claim 4, wherein the method comprises the following steps: turning over the PP cotton threads every 10min in the second step and the fourth step.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4197139A (en) * | 1978-08-23 | 1980-04-08 | Hjersted Norman B | Process for the reclamation of acid from spent pickle liquor |
| CN101476041A (en) * | 2008-12-12 | 2009-07-08 | 佛山市邦普镍钴技术有限公司 | Method for separating and recycling copper, nickel and regenerative plastic from waste electroplating plastic |
| CN102399992A (en) * | 2011-12-16 | 2012-04-04 | 东北大学 | Method for recovering valuable metals from waste plastic plating layer containing copper and nickel |
| CN108083508A (en) * | 2017-12-28 | 2018-05-29 | 湖州师范学院 | Stainless steel acid-washing waste liquid handles recovery method |
| CN109352869A (en) * | 2018-10-24 | 2019-02-19 | 长沙汇聚环境技术有限公司 | A method of recycling metal and plastics from the waste plastics containing the coat of metal |
| KR101965748B1 (en) * | 2018-02-21 | 2019-04-04 | 리콤 주식회사 | Recycling method of waste abs resin coated chromium, nickel and copper |
-
2019
- 2019-09-09 CN CN201910848486.7A patent/CN110565359A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4197139A (en) * | 1978-08-23 | 1980-04-08 | Hjersted Norman B | Process for the reclamation of acid from spent pickle liquor |
| CN101476041A (en) * | 2008-12-12 | 2009-07-08 | 佛山市邦普镍钴技术有限公司 | Method for separating and recycling copper, nickel and regenerative plastic from waste electroplating plastic |
| CN102399992A (en) * | 2011-12-16 | 2012-04-04 | 东北大学 | Method for recovering valuable metals from waste plastic plating layer containing copper and nickel |
| CN108083508A (en) * | 2017-12-28 | 2018-05-29 | 湖州师范学院 | Stainless steel acid-washing waste liquid handles recovery method |
| KR101965748B1 (en) * | 2018-02-21 | 2019-04-04 | 리콤 주식회사 | Recycling method of waste abs resin coated chromium, nickel and copper |
| CN109352869A (en) * | 2018-10-24 | 2019-02-19 | 长沙汇聚环境技术有限公司 | A method of recycling metal and plastics from the waste plastics containing the coat of metal |
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