CN115672259B - Preparation method of magnesium chloride modified silica gel drying agent - Google Patents
Preparation method of magnesium chloride modified silica gel drying agent Download PDFInfo
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- CN115672259B CN115672259B CN202211466387.0A CN202211466387A CN115672259B CN 115672259 B CN115672259 B CN 115672259B CN 202211466387 A CN202211466387 A CN 202211466387A CN 115672259 B CN115672259 B CN 115672259B
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- Prior art keywords
- silica gel
- magnesium chloride
- spherical particles
- chloride solution
- saturated
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- TWRXJAOTZQYOKJ-UHFFFAOYSA-L magnesium chloride Substances [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 title claims abstract description 125
- 229910001629 magnesium chloride Inorganic materials 0.000 title claims abstract description 40
- 239000002274 desiccant Substances 0.000 title claims abstract description 19
- -1 magnesium chloride modified silica gel Chemical class 0.000 title claims abstract description 18
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 85
- 239000012798 spherical particle Substances 0.000 claims abstract description 75
- 238000001035 drying Methods 0.000 claims abstract description 46
- 238000000034 method Methods 0.000 claims abstract description 21
- 239000000741 silica gel Substances 0.000 claims abstract description 15
- 229910002027 silica gel Inorganic materials 0.000 claims abstract description 15
- 239000002245 particle Substances 0.000 claims abstract description 12
- 229920006395 saturated elastomer Polymers 0.000 claims abstract description 10
- 238000006703 hydration reaction Methods 0.000 claims abstract description 9
- 239000002243 precursor Substances 0.000 claims abstract description 7
- 238000005507 spraying Methods 0.000 claims abstract description 7
- 238000012216 screening Methods 0.000 claims abstract description 6
- 208000005156 Dehydration Diseases 0.000 claims abstract description 4
- 230000018044 dehydration Effects 0.000 claims abstract description 4
- 238000006297 dehydration reaction Methods 0.000 claims abstract description 4
- 239000000178 monomer Substances 0.000 claims description 21
- 238000011084 recovery Methods 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 6
- 238000005406 washing Methods 0.000 claims description 6
- 238000010521 absorption reaction Methods 0.000 claims description 5
- 230000008859 change Effects 0.000 claims description 5
- 230000009471 action Effects 0.000 claims description 3
- 239000012153 distilled water Substances 0.000 claims description 3
- 238000004064 recycling Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000010924 continuous production Methods 0.000 abstract 1
- 230000008595 infiltration Effects 0.000 abstract 1
- 238000001764 infiltration Methods 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 45
- 238000007598 dipping method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 239000012047 saturated solution Substances 0.000 description 2
- 238000004587 chromatography analysis Methods 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
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- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The invention discloses a preparation method of a magnesium chloride modified silica gel drying agent, which comprises the steps of preparing silica gel spherical particles, conveying the silica gel spherical particles through a net-shaped conveying belt, spraying saturated magnesium chloride solution on the lateral silica gel spherical particles on the conveying belt, conveying the silica gel spherical particles which are absorbed with the saturated magnesium chloride solution into a centrifugal separator for screening, conveying the silica gel spherical particles which are absorbed with the saturated magnesium chloride solution on the saturated particle conveying belt into a drying box for drying to prepare a drying agent precursor, and continuously conveying the drying box group for secondary dehydration to obtain low-hydration magnesium chloride. The invention can carry out continuous production, has large disposable treatment capacity, does not need to wait for a certain procedure, and can accurately judge and distinguish the infiltration effect by distinguishing whether the silica gel particles are full of solution or not through the weight in a screening mode, thus the preparation efficiency of the whole production process is high, the effect is good, and the quality of the finally produced magnesium chloride modified silica gel desiccant is improved.
Description
Technical Field
The invention relates to a preparation method of a drying agent, in particular to a preparation method of a magnesium chloride modified silica gel drying agent, and belongs to the technical field of drying agents.
Background
The magnesium chloride desiccant has good dehumidifying capability in all humidity environments from low humidity to high humidity, and the maximum moisture absorption of the magnesium chloride desiccant is more than 210% of the weight of the magnesium chloride desiccant, which is equivalent to 7 times of the moisture absorption of the silica gel desiccant, but the magnesium chloride has certain toxicity and is not generally used for food desiccant in view of safety. The silica gel desiccant has good stability and high safety, and even if the silica gel desiccant is eaten by mistake, the silica gel cannot be digested and absorbed, is nontoxic and harmless, and can be used for drying food, electronic accessories and the like. Therefore, if the silica gel can be combined, the silica gel has the characteristics of safety and innocuity, and has better drying and moisture absorption performance. At present, a part of literature proposes that silica gel is immersed in a magnesium chloride solution and then dried to obtain a silica gel drying agent doped with magnesium chloride, so that the effect of combining the silica gel and the magnesium chloride is achieved. However, the process has the disadvantages of long dipping time, limited disposable throughput, and incapability of accurately judging dipping effect and mass production.
Disclosure of Invention
The invention aims to solve the technical problem of providing a preparation method of a magnesium chloride modified silica gel desiccant, which can realize mass and high-efficiency production of the magnesium chloride modified silica gel desiccant.
In order to solve the technical problems, the invention adopts the following technical scheme:
the preparation method of the magnesium chloride modified silica gel desiccant is characterized by comprising the following steps of:
S1, preparing silica gel spherical particles;
S2, conveying the silica gel spherical particles through a mesh conveying belt, and spraying saturated magnesium chloride solution on the silica gel spherical particles laterally on the conveying belt;
S3, conveying the silica gel spherical particles which are absorbed with the saturated magnesium chloride solution into a centrifugal separator for screening, collecting the silica gel spherical particles which are fully absorbed with the saturated magnesium chloride solution on the outer layer of the centrifugal separator to a saturated particle conveyer belt, and conveying the silica gel spherical particles which are not fully absorbed with the saturated magnesium chloride solution on the inner layer of the centrifugal separator back to a feeding port of a net conveyer belt through an unsaturated conveyer belt;
s4, conveying silica gel spherical particles fully absorbed with saturated magnesium chloride solution on a saturated particle conveying belt into a drying box for drying to prepare a drying agent precursor;
S5, sending the drying agent precursor into a drying box group for secondary dehydration, so that the high-hydration magnesium chloride in the silica gel spherical particles is dehydrated into low-hydration magnesium chloride.
Further, the step S1 specifically includes: the column layer is subjected to layer chromatography and silica gel preparation into spherical particles with uniform size by a granulator, then the prepared spherical particles of silica gel are added into distilled water for washing, and after repeated washing for a plurality of times, the washed spherical particles of silica gel are dried and cooled.
Further, in the step S2, a recovery tank for the saturated magnesium chloride solution is provided at the lower side of the mesh conveyor belt, the recovery tank collects the saturated magnesium chloride solution on the mesh conveyor belt which is not absorbed by the silica gel spherical particles, and then the saturated magnesium chloride solution is pumped into the saturated magnesium chloride solution tank body by a recovery pump for recycling.
Further, a liquid level sensor and a concentration sensor are arranged in the saturated magnesium chloride solution box body, and the liquid level of the saturated magnesium chloride solution and the concentration of the magnesium chloride solution in the saturated magnesium chloride solution box body are monitored in real time.
Further, in the step S3, the silica gel spherical particles fully absorbed with the saturated magnesium chloride solution are added to the middle position of the inner centrifugal disc body through the feeding port at the upper end of the centrifugal separator, the centrifugal disc body is an inverted conical disc body, the silica gel spherical particles gradually move to the outer side of the centrifugal disc body under the action of centrifugal force along with the rotation of the centrifugal disc body, when the speed of the silica gel spherical particles and the centrifugal disc body reach the balance, the mass of the silica gel spherical particles fully absorbed with the saturated magnesium chloride solution is greater than that of the silica gel spherical particles fully not absorbed at the moment, so that the silica gel spherical particles fully absorbed with the saturated magnesium chloride solution are positioned at the outermost side in the centrifugal disc, the silica gel spherical particles fully absorbed with the saturated magnesium chloride solution and the silica gel spherical particles fully absorbed with the saturated magnesium chloride solution are respectively collected through two collecting channels by a partition plate, wherein the silica gel spherical particles fully absorbed with the saturated magnesium chloride solution are sent into the next procedure through a saturated particle conveying belt, and the silica gel spherical particles fully absorbed with the saturated magnesium chloride solution are returned to the feeding port through the unsaturated conveying belt for the second spraying of the saturated magnesium chloride solution.
Further, in the step S4, the temperature of the drying oven is 60 ℃.
Further, in the step S5, the drying box group is formed by connecting a plurality of drying box monomers in series.
Further, the temperature of the plurality of drying oven monomers is gradually increased, and the temperature change range is 110-140 ℃.
Further, the drying box group is formed by connecting four drying box monomers in series, wherein the temperature of the first drying box monomer is 110 ℃, the temperature of the second drying box monomer is 125 ℃, the temperature of the third drying box monomer is 135 ℃, and the temperature of the fourth drying box monomer is 140 ℃.
Compared with the prior art, the invention has the following advantages and effects:
According to the invention, the saturated solution of magnesium chloride is soaked in the silica gel particles in a spraying mode, and the silica gel spherical particles fully absorbed with the saturated solution of magnesium chloride are screened out in a centrifugal separation mode to prepare the drying agent for the next procedure.
Drawings
FIG. 1 is a flow chart of a method for preparing a magnesium chloride modified silica gel desiccant according to the present invention.
Detailed Description
In order to explain in detail the technical solutions adopted by the present invention to achieve the predetermined technical purposes, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments, and that technical means or technical features in the embodiments of the present invention may be replaced without inventive effort, and the present invention will be described in detail below with reference to the accompanying drawings in combination with the embodiments.
As shown in fig. 1, the preparation method of the magnesium chloride modified silica gel desiccant is characterized by comprising the following steps:
s1, preparing silica gel spherical particles.
The column layer silica gel is prepared into spherical particles with uniform size by a granulator, and the spherical particles are convenient for screening and separating in a subsequent centrifugal separator. And then adding the prepared silica gel spherical particles into distilled water for washing, repeatedly washing for a plurality of times, and cooling after drying the cleaned silica gel spherical particles.
S2, conveying the silica gel spherical particles through a mesh conveying belt, and spraying saturated magnesium chloride solution on the silica gel spherical particles laterally on the conveying belt.
The lower side of the reticular conveyer belt is provided with a recovery box of saturated magnesium chloride solution, the recovery box collects the saturated magnesium chloride solution which is not absorbed by the silica gel spherical particles on the reticular conveyer belt, and then the saturated magnesium chloride solution is pumped into a saturated magnesium chloride solution box body through a recovery pump for recycling.
A liquid level sensor and a concentration sensor are arranged in the saturated magnesium chloride solution box body, and the liquid level of the saturated magnesium chloride solution in the saturated magnesium chloride solution box body and the concentration of the magnesium chloride solution are monitored in real time.
S3, conveying the silica gel spherical particles which are absorbed with the saturated magnesium chloride solution into a centrifugal separator for screening, collecting the silica gel spherical particles which are fully absorbed with the saturated magnesium chloride solution on the outer layer of the centrifugal separator to a saturated particle conveyer belt, and conveying the silica gel spherical particles which are not fully absorbed with the saturated magnesium chloride solution on the inner layer of the centrifugal separator back to a feeding port of a net conveyer belt through an unsaturated conveyer belt.
The silica gel spherical particles which are absorbed by the saturated magnesium chloride solution are added to the middle position of an inner centrifugal disc body through a feed inlet at the upper end of a centrifugal separator, the centrifugal disc body is an inverted conical disc body, the silica gel spherical particles gradually move to the outer side of the centrifugal disc body under the action of centrifugal force along with the rotation of the centrifugal disc body, when the speed of the silica gel spherical particles and the centrifugal disc body reach the balance, the mass of the silica gel spherical particles which are absorbed by the saturated magnesium chloride solution is larger than that of the silica gel spherical particles which are not absorbed by the silica gel spherical particles, so that the silica gel spherical particles which are absorbed by the saturated magnesium chloride solution are positioned at the outermost side in the centrifugal disc, the silica gel spherical particles are separated into two collecting channels through a partition plate to collect the silica gel spherical particles which are absorbed by the saturated magnesium chloride solution and the silica gel spherical particles which are not absorbed by the saturated magnesium chloride solution respectively, wherein the silica gel spherical particles which are absorbed by the saturated magnesium chloride solution are fed into a next procedure through a saturated particle conveying belt, and the silica gel spherical particles which are absorbed by the saturated magnesium chloride solution are conveyed back to a feed inlet of a net conveying belt through an unsaturated conveying belt, so as to perform secondary spraying and absorption of the saturated magnesium chloride solution.
S4, conveying the silica gel spherical particles fully absorbed with the saturated magnesium chloride solution on the saturated particle conveying belt into a drying box for drying to prepare a drying agent precursor. Wherein the temperature of the drying oven is 60 ℃.
S5, sending the drying agent precursor into a drying box group for secondary dehydration, so that the high-hydration magnesium chloride in the silica gel spherical particles is dehydrated into low-hydration magnesium chloride. The drying box group is formed by connecting a plurality of drying box monomers in series. And the temperature of the plurality of drying oven monomers is gradually increased, and the temperature change range is 110-140 ℃.
In one embodiment of the invention, the drying oven set is formed by four drying oven monomers in series, wherein the temperature of the first drying oven monomer is 110 ℃, the temperature of the second drying oven monomer is 125 ℃, the temperature of the third drying oven monomer is 135 ℃, and the temperature of the fourth drying oven monomer is 140 ℃. The temperature change of the gradient type is adopted in the embodiment, the temperature change of the early stage is larger, the high-hydration magnesium chloride (MgCl 2·6H2 O) can be rapidly decomposed into the low-hydration magnesium chloride (MgCl 2·2H2 O and MgCl 2·H2 O), and the temperature of the rear surface is gradually reduced, so that the final temperature is kept below 140 ℃, and the magnesium chloride can be dehydrated without decomposing magnesium oxide.
The present invention is not limited to the preferred embodiments, but is capable of modification and variation in detail, and other embodiments, such as those described above, of making various modifications and equivalents will fall within the spirit and scope of the present invention.
Claims (8)
1. The preparation method of the magnesium chloride modified silica gel desiccant is characterized by comprising the following steps of:
S1, preparing silica gel spherical particles;
The step S1 specifically comprises the following steps: preparing silica gel on a column layer into spherical particles with uniform size by a granulator, adding the prepared spherical particles of the silica gel into distilled water for washing, repeatedly washing for a plurality of times, drying the washed spherical particles of the silica gel, and cooling;
S2, conveying the silica gel spherical particles through a mesh conveying belt, and spraying saturated magnesium chloride solution on the silica gel spherical particles laterally on the conveying belt;
S3, conveying the silica gel spherical particles which are absorbed with the saturated magnesium chloride solution into a centrifugal separator for screening, collecting the silica gel spherical particles which are fully absorbed with the saturated magnesium chloride solution on the outer layer of the centrifugal separator to a saturated particle conveyer belt, and conveying the silica gel spherical particles which are not fully absorbed with the saturated magnesium chloride solution on the inner layer of the centrifugal separator back to a feeding port of a net conveyer belt through an unsaturated conveyer belt;
s4, conveying silica gel spherical particles fully absorbed with saturated magnesium chloride solution on a saturated particle conveying belt into a drying box for drying to prepare a drying agent precursor;
S5, sending the drying agent precursor into a drying box group for secondary dehydration, so that the high-hydration magnesium chloride in the silica gel spherical particles is dehydrated into low-hydration magnesium chloride.
2. The method for preparing the magnesium chloride modified silica gel desiccant according to claim 1, wherein the method comprises the following steps: in the step S2, a recovery box of saturated magnesium chloride solution is arranged at the lower side of the mesh conveyor belt, the recovery box collects the saturated magnesium chloride solution which is not absorbed by the silica gel spherical particles on the mesh conveyor belt, and then the saturated magnesium chloride solution is pumped into a saturated magnesium chloride solution box body through a recovery pump for recycling.
3. The method for preparing the magnesium chloride modified silica gel desiccant according to claim 2, wherein the method comprises the following steps: a liquid level sensor and a concentration sensor are arranged in the saturated magnesium chloride solution box body, and the liquid level of the saturated magnesium chloride solution in the saturated magnesium chloride solution box body and the concentration of the magnesium chloride solution are monitored in real time.
4. The method for preparing the magnesium chloride modified silica gel desiccant according to claim 2, wherein the method comprises the following steps: in the step S3, the silica gel spherical particles which are fully absorbed with the saturated magnesium chloride solution are added to the middle position of the inner centrifugal disc body through the feeding port at the upper end of the centrifugal separator, the centrifugal disc body is an inverted conical disc body, the silica gel spherical particles gradually move towards the outer side of the centrifugal disc body under the action of centrifugal force along with the rotation of the centrifugal disc body, when the speed of the silica gel spherical particles and the centrifugal disc body reach the balance, the mass of the silica gel spherical particles which are fully absorbed with the saturated magnesium chloride solution is greater than that of the silica gel spherical particles which are not fully absorbed at the moment, so that the silica gel spherical particles which are fully absorbed with the saturated magnesium chloride solution are positioned at the outermost side in the centrifugal disc, the silica gel spherical particles which are fully absorbed with the saturated magnesium chloride solution and the silica gel spherical particles which are not fully absorbed with the saturated magnesium chloride solution are respectively collected through two collecting channels, wherein the silica gel spherical particles which are fully absorbed with the saturated magnesium chloride solution are sent into the next procedure through the saturated particle conveying belt, and the silica gel spherical particles which are not fully absorbed with the saturated magnesium chloride solution are returned to the feeding port through the unsaturated conveying belt, and the secondary absorption of the saturated magnesium chloride solution is carried out.
5. The method for preparing the magnesium chloride modified silica gel desiccant according to claim 1, wherein the method comprises the following steps: in the step S4, the temperature of the drying oven is 60 ℃.
6. The method for preparing the magnesium chloride modified silica gel desiccant according to claim 1, wherein the method comprises the following steps: in the step S5, the drying box group is formed by connecting a plurality of drying box monomers in series.
7. The method for preparing the magnesium chloride modified silica gel desiccant according to claim 6, wherein the method comprises the following steps: the temperature of the plurality of drying oven monomers is gradually increased, and the temperature change range is 110-140 ℃.
8. The method for preparing the magnesium chloride modified silica gel desiccant according to claim 7, wherein the method comprises the following steps: the drying box group is formed by connecting four drying box monomers in series, wherein the temperature of the first drying box monomer is 110 ℃, the temperature of the second drying box monomer is 125 ℃, the temperature of the third drying box monomer is 135 ℃, and the temperature of the fourth drying box monomer is 140 ℃.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107700245A (en) * | 2017-09-29 | 2018-02-16 | 张新文 | The online modified technique of fiber |
| CN108993891A (en) * | 2018-06-29 | 2018-12-14 | 东北大学 | Liquid magnesium chloride granulation and gradation collecting device and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2174870C2 (en) * | 2000-01-10 | 2001-10-20 | Самонин Вячеслав Викторович | Method of preparing air drier |
| CN102409167B (en) * | 2010-09-26 | 2013-10-16 | 鞍钢股份有限公司 | Sintered ore pulverization inhibitor and adding method thereof |
| CN102954670A (en) * | 2011-08-25 | 2013-03-06 | 山东旭业新材料股份有限公司 | Wet material separator and separating and drying method |
| CN102941062A (en) * | 2012-11-29 | 2013-02-27 | 大连创达技术交易市场有限公司 | Silica gel drying adsorbent |
| CN204672461U (en) * | 2015-03-19 | 2015-09-30 | 李长达 | A kind of high accuracy grain impurity-removing screening machine |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107700245A (en) * | 2017-09-29 | 2018-02-16 | 张新文 | The online modified technique of fiber |
| CN108993891A (en) * | 2018-06-29 | 2018-12-14 | 东北大学 | Liquid magnesium chloride granulation and gradation collecting device and method |
Non-Patent Citations (1)
| Title |
|---|
| "镁硅复合材料的制备及吸附性能的研究";赵友星;中国优秀博硕士学位论文全文数据库（硕士）工程科技I辑(第4期);第2.3.1、3.1.4节 * |
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