CN104944663A - Vulcanized paper recovery solution treatment technology - Google Patents
Vulcanized paper recovery solution treatment technology Download PDFInfo
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- CN104944663A CN104944663A CN201510289135.9A CN201510289135A CN104944663A CN 104944663 A CN104944663 A CN 104944663A CN 201510289135 A CN201510289135 A CN 201510289135A CN 104944663 A CN104944663 A CN 104944663A
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- ethylene recov
- vulcan fibre
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Abstract
The invention discloses a vulcanized paper recovery solution treatment technology. The technology comprises the following steps: 1, taking a vulcanized paper recovery solution, that is a zinc chloride solution, and introducing the solution into a filter; 2, heating the solution obtained in step 1, adding zinc sulfate, and uniformly mixing; 3, adding hydrogen peroxide to the solution obtained in step 2, and reacting; 4, adding zinc oxide to a product prepared in step 3, adjusting the pH value of the product to 1.3, precipitating the above obtained solution, and filtering; and 5, concentrating the filtered solution obtained in step 4, adding hydrogen peroxide for bleaching, and filtering. The vulcanized paper recovery solution treatment technology has the advantages of improvement of the reuse rate of the vulcanized paper recovery solution, and production cost saving.
Description
Technical field
The present invention relates to a kind of process for treating waste liquor, more particularly, it relates to a kind of vulcan fibre Ethylene recov treatment process.
Background technology
Vulcan fibre is the fiber board made with the vegetable fibre modification that content of cellulose is high.Quality hard steely thus claim vulcan fibre.Its density ratio aluminium is little, and physical strength is but higher than aluminium, and suitable various mechanical workout, Application Areas is more and more wider.As electric equipment products, mechanical component, textile equipment, grinding consumptive material etc., be meet industrial development direction, have the product of development space.
Vulcan fibre is the body paper of being manufactured paper with pulp by cotton fibre, produces fiber swelling peptization through liquor zinci chloridi dipping, under temperature-pressure condition, through overcuring, desalination, drying, arrangement, packaging and making.
Zinc chloride reaction soln is recycling in vulcan fibre is produced.Both meet environmental requirement, again reduce the production cost of product.
In vulcan fibre production process, Ethylene recov has a lot of metal ion, as calcium, iron etc.Fiber fines in body paper and a small amount of hemicellulose are also molten in zinc chloride Ethylene recov.When the recycling of zinc chloride Ethylene recov, these impurity constantly accumulate, and acquire a certain degree, and will impact, cannot normally produce time serious the quality product of vulcan fibre.
Summary of the invention
For the deficiency that prior art exists, the object of the present invention is to provide a kind for the treatment of process to vulcan fibre Ethylene recov, its repeating utilization factor is improved, more saves production cost.
For achieving the above object, the invention provides following technical scheme: a kind of vulcan fibre Ethylene recov treatment process, comprising:
S1: get vulcan fibre Ethylene recov, i.e. liquor zinci chloridi, and passed into strainer;
S2: by S1 step gained liquid heat, and add zinc sulfate wherein and carry out Homogeneous phase mixing;
S3: add hydrogen peroxide and react in the liquid obtained by S2 step;
S4: add zinc oxide in the product obtained by S3 step, regulates PH numerical value to 1.3, and by liquid precipitation, filtration;
S5: the liquid filtered by S4 concentrates, and again add hydrogen peroxide wherein and carry out bleaching and filtering.
The present invention is set to further: the temperature heated in described S2 step is between 70 DEG C-80 DEG C, and after adding zinc sulfate, the reaction times is 1 hour.
The present invention is set to further: in described S3 step, and after adding hydrogen peroxide, the reaction times is 1 hour.
The present invention is set to further: in described S4 step, the liquid precipitation time is 24 hours.
The present invention is set to further: described strainer is plate and frame(type)filter press.
The present invention is set to further: in described S5 step, liquid is concentrated by high-efficiency evaporator.
By adopting technique scheme, the Ethylene recov that vulcan fibre produces in producing, namely through rare liquor zinci chloridi that desalination is reclaimed, first filters through plate and frame(type)filter press, is separated by the fiber fines suspended in the solution.Be equivalent to remove the fiber impurity in solution, then Ethylene recov be heated to the temperature of 70 DEG C-80 DEG C, and pass into zinc sulfate, make its mixing uniformly one hour.In this step, in solution, bring sulfate radical into, for the magazine calcium example in follow-up removal solution provides possibility, and do not added other foreign ion here, ensure that the purity of Ethylene recov.Then hydrogen peroxide is added wherein again, the material that this oxidisability is very strong, oxidation of divalent iron ion in solution can be become ferric ion, so just follow-up add zinc oxide in, the zinc oxide ferric ion that adds water can react and forms ironic hydroxide flocks, and the iron ion in solution can be made like this to be separated.And after zinc oxide here adds, pH value is adjusted to 1.3, iron ion can be made fully to be reacted completely, and do not bring new foreign ion into simultaneously.Left standstill 24 hours afterwards, ironic hydroxide flocks and calcium sulfate are precipitated completely, filter, Ethylene recov can be purified, can further reuse.At Ethylene recov after previous step filtration step, concentrated by high-efficiency evaporator, and again add hydrogen peroxide and bleach.Due to repeatedly using along with liquor zinci chloridi, be dissolved in hemicellulose in liquor zinci chloridi and the lower Mierocrystalline cellulose of the polymerization degree by coking in high temperature concentration process, the blackening of liquor zinci chloridi color, viscosity increases, vulcan fibre is produced very difficult, especially produce white fibre.So the hydrogen peroxide oxidation that again adds here decomposes release amount of heat, with the Mierocrystalline cellulose generation oxidizing reaction of the hemicellulose in liquor zinci chloridi and low polymerization degree, and bleach.The product density that reaction generates is little, swims in liquor zinci chloridi surface, and is filtered away, thus reach the object with separating organic matters.Hydrogen peroxide resultant is water, and neither etching apparatus does not pollute again.Such a technological process, just makes vulcan fibre Ethylene recov obtain each purification and recycle.Make its recycling number of times become many, repeating utilization factor improves, and reaches save energy, cost-saving advantage.
Embodiment
A kind of vulcan fibre Ethylene recov treatment process, comprising:
The first step, gets vulcan fibre Ethylene recov, i.e. liquor zinci chloridi, and is passed into strainer.In the present embodiment, the strainer selected is plate and frame(type)filter press, and this is a kind of very ripe industrial equipments, has good separating effect, wide adaptability, especially for the separation of sticky fine material, has the superiority of its uniqueness.Can be good at the fiber fines in Ethylene recov to removing.
Second step, by gained liquid heat in the first step, and adds zinc sulfate wherein and carries out Homogeneous phase mixing.In the present embodiment, preferred Heating temperature is 75 DEG C, and mixing time is 1 hour, and like this at a relatively high temperature, molecular motion velocities is accelerated, advantageously in its mixing.And the mixing time of 1 hour, zinc sulfate and Ethylene recov also can be made fully to mix.The effect of this step, provides sulfate ion in solution, can facilitate in subsequent process flow, and sulfate ion and calcium binding separate out calcium ion.
3rd step, adds hydrogen peroxide and reacts in the liquid obtained by second step.Here the reaction times added after hydrogen peroxide is set to 1 hour, and hydrogen peroxide can be made fully to become the oxidation of divalent iron ion in Ethylene recov to ferric ion.For the journey of carrying out smoothly of follow-up process flow provides guarantee.
4th step, adds zinc oxide in the product obtained by the 3rd step, regulates PH numerical value to 1.3, and by liquid precipitation, filtration.In the present embodiment, in solution, add zinc oxide, chemical reaction can be carried out with water, ferric ion, generate ironic hydroxide flocks, calcium ion together can be precipitated with the form of calcium sulfate simultaneously.Here pH value controls 1.3, is only used to guarantee to be removed by iron ions all in Ethylene recov fully.
5th step, concentrates the liquid filtered in the 4th step, and again adds hydrogen peroxide wherein and carry out bleaching and filtering.Due to repeatedly using along with liquor zinci chloridi, be dissolved in hemicellulose in liquor zinci chloridi and the lower Mierocrystalline cellulose of the polymerization degree by coking in high temperature concentration process, the blackening of liquor zinci chloridi color, viscosity increases, vulcan fibre is produced very difficult, especially produce white fibre.So the hydrogen peroxide oxidation that again adds here decomposes release amount of heat, with the Mierocrystalline cellulose generation oxidizing reaction of the hemicellulose in liquor zinci chloridi and low polymerization degree, and bleach.The product density that reaction generates is little, swims in liquor zinci chloridi surface, and is filtered away, thus reach the object with separating organic matters.Hydrogen peroxide resultant is water, and neither etching apparatus does not pollute again.Such a technological process, just makes vulcan fibre Ethylene recov obtain each purification and recycle.Make its recycling number of times become many, repeating utilization factor improves, and reaches save energy, cost-saving advantage.
The above is the preferred embodiment of the present invention, and under not departing from the prerequisite of the principle of the invention to those skilled in the art, can also make some modification and improvement, these also should be considered as protection scope of the present invention.
Claims (6)
1. a vulcan fibre Ethylene recov treatment process, is characterized in that comprising the steps:
S1: get vulcan fibre Ethylene recov, i.e. liquor zinci chloridi, and passed into strainer;
S2: by S1 step gained liquid heat, and add zinc sulfate wherein and carry out Homogeneous phase mixing;
S3: add hydrogen peroxide and react in the liquid obtained by S2 step;
S4: add zinc oxide in the product obtained by S3 step, regulates PH numerical value to 1.3, and by liquid precipitation, filtration;
S5: the liquid filtered by S4 concentrates, and again add hydrogen peroxide wherein and carry out bleaching and filtering.
2. vulcan fibre Ethylene recov treatment process according to claim 1, it is characterized in that: the temperature heated in described S2 step is between 70 DEG C-80 DEG C, after adding zinc sulfate, mixing time is 1 hour.
3. vulcan fibre Ethylene recov treatment process according to claim 1, is characterized in that: in described S3 step, after adding hydrogen peroxide, the reaction times is 1 hour.
4. vulcan fibre Ethylene recov treatment process according to claim 1, is characterized in that: in described S4 step, the liquid precipitation time is 24 hours.
5. vulcan fibre Ethylene recov treatment process according to claim 1, is characterized in that: described strainer is plate and frame(type)filter press.
6. vulcan fibre Ethylene recov treatment process according to claim 1, is characterized in that: in described S5 step, liquid is concentrated by high-efficiency evaporator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510289135.9A CN104944663A (en) | 2015-05-30 | 2015-05-30 | Vulcanized paper recovery solution treatment technology |
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| CN201510289135.9A CN104944663A (en) | 2015-05-30 | 2015-05-30 | Vulcanized paper recovery solution treatment technology |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111719338A (en) * | 2020-06-30 | 2020-09-29 | 浙江科技学院 | Production process of high-whiteness vulcanized fiber paper |
| CN114870413A (en) * | 2022-04-14 | 2022-08-09 | 杭州特种纸业有限公司 | Recycling method of zinc chloride solution for vulcanized fiber paper |
-
2015
- 2015-05-30 CN CN201510289135.9A patent/CN104944663A/en active Pending
Non-Patent Citations (1)
| Title |
|---|
| 周嫩民等: "过氧化氢在钢纸板生产中净化氯化锌胶化液的研究", 《化学工程师》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111719338A (en) * | 2020-06-30 | 2020-09-29 | 浙江科技学院 | Production process of high-whiteness vulcanized fiber paper |
| CN114870413A (en) * | 2022-04-14 | 2022-08-09 | 杭州特种纸业有限公司 | Recycling method of zinc chloride solution for vulcanized fiber paper |
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Inventor after: Hu Yue Inventor after: Zhu Zhijian Inventor after: Wang Yingqian Inventor after: Hu Peilin Inventor after: Jia Haijian Inventor before: Hu Yue Inventor before: Zhu Zhijian Inventor before: Hu Peilin Inventor before: Jia Haijian |
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Application publication date: 20150930 |
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