CN114210180A - Dehumidifying device - Google Patents
Dehumidifying device Download PDFInfo
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- CN114210180A CN114210180A CN202111554869.7A CN202111554869A CN114210180A CN 114210180 A CN114210180 A CN 114210180A CN 202111554869 A CN202111554869 A CN 202111554869A CN 114210180 A CN114210180 A CN 114210180A
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- moisture
- dehumidifying device
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- dimethylacetamide
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
- B01D53/268—Drying gases or vapours by diffusion
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/22—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by diffusion
- B01D53/228—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by diffusion characterised by specific membranes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
- B01D53/261—Drying gases or vapours by adsorption
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
- B01D71/06—Organic material
- B01D71/58—Other polymers having nitrogen in the main chain, with or without oxygen or carbon only
- B01D71/62—Polycondensates having nitrogen-containing heterocyclic rings in the main chain
- B01D71/64—Polyimides; Polyamide-imides; Polyester-imides; Polyamide acids or similar polyimide precursors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/04—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of alkali metals, alkaline earth metals or magnesium
- B01J20/046—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of alkali metals, alkaline earth metals or magnesium containing halogens, e.g. halides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
- B01J20/26—Synthetic macromolecular compounds
- B01J20/261—Synthetic macromolecular compounds obtained by reactions only involving carbon to carbon unsaturated bonds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2220/00—Aspects relating to sorbent materials
- B01J2220/40—Aspects relating to the composition of sorbent or filter aid materials
- B01J2220/46—Materials comprising a mixture of inorganic and organic materials
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2220/00—Aspects relating to sorbent materials
- B01J2220/40—Aspects relating to the composition of sorbent or filter aid materials
- B01J2220/48—Sorbents characterised by the starting material used for their preparation
- B01J2220/4806—Sorbents characterised by the starting material used for their preparation the starting material being of inorganic character
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2220/00—Aspects relating to sorbent materials
- B01J2220/40—Aspects relating to the composition of sorbent or filter aid materials
- B01J2220/48—Sorbents characterised by the starting material used for their preparation
- B01J2220/4812—Sorbents characterised by the starting material used for their preparation the starting material being of organic character
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Analytical Chemistry (AREA)
- Engineering & Computer Science (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Drying Of Gases (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The invention provides a dehumidifying device; the dehumidifying device adopts a passive moisture absorption method, and under the environment of protective gas, an additive, a polymerization main body, an initiator and a cross-linking agent are prepared into an aqueous solution and mixed for polymerization reaction to prepare a moisture absorbent; the moisture absorbent is a composite gel moisture absorbent, has a special pore structure, and is 2.5 times of the moisture absorption amount of the common calcium chloride moisture absorbent; the moisture permeable film for sealing is a polymer film, is prepared from ketone anhydride, N-dimethylacetamide, a catalyst and diisocyanate, has a moisture permeability larger than that of common moisture permeable paper and a more stable service life, and can be regenerated by an integral heating mode.
Description
Technical Field
The invention relates to the field of dehumidification, in particular to a dehumidification device.
Background
The existing active dehumidification mainly condenses air by compression and other methods, so that moisture in the air is changed into liquid water, and then the liquid water is collected and removed, thereby reducing the humidity in the air; this method requires an additional power supply, and the machine is large in size, noisy and high in power consumption.
The passive dehumidification mainly adopts moisture absorbent to absorb moisture in the air, the main moisture absorbent is calcium chloride, silica gel, active carbon, molecular sieve, zeolite and the like, and the moisture absorbent is generally directly exposed in the air or sealed by a moisture permeable material, so that the moisture enters through the moisture permeable material. The solid adsorbent has problems of short life, low adsorption amount, poor reproducibility, low moisture permeability of the sealed moisture permeable material, and easy damage.
Disclosure of Invention
The invention aims to provide a dehumidifying device aiming at the defects in the prior art.
In order to achieve the purpose, the invention adopts the technical scheme that:
provided is a dehumidifying apparatus including: the moisture absorbent is arranged in the container, and the moisture permeable film is arranged at the opening of the container;
the moisture absorbent is prepared by carrying out aqueous solution free radical polymerization reaction on an additive, a polymerization main body, an initiator and a cross-linking agent in a protective gas environment;
the moisture permeable film is prepared by mixing and dissolving polyimide and N, N-dimethylacetamide to obtain a casting solution, and carrying out film scraping treatment, drying and standing on the casting solution; the thickness of the moisture permeable film is 100-200 μm.
Preferably, the moisture absorbent comprises, in parts by weight:
more preferably, the additive is calcium chloride.
More preferably, the polymeric host is polyacrylamide.
More preferably, the initiator is ammonium persulfate.
More preferably, the crosslinker is N, N' -methylenebisacrylamide.
Preferably, the reaction temperature of the aqueous solution free radical polymerization reaction is 50 ℃ to 80 ℃.
Preferably, the polyimide is prepared from a ketone anhydride, N-dimethylacetamide, a catalyst, and a diisocyanate.
More preferably, the polyimide is prepared by the steps comprising:
dissolving 30-40 parts of ketone anhydride and 30-50 parts of N, N-dimethylacetamide for 5-30 minutes; and adding 1-3 parts of sodium hydroxide, adding 15-20 parts of diisocyanate, and drying to obtain the polyimide solid.
Preferably, the mass ratio of the polyimide to the N, N-dimethylacetamide in the moisture-permeable membrane is (40-110): 100.
By adopting the technical scheme, compared with the prior art, the invention has the following technical effects:
the dehumidifying device adopts a passive moisture absorption method, the moisture absorbent is a composite gel moisture absorbent, has a special pore structure which is 2.5 times of the moisture absorption amount of the common calcium chloride moisture absorbent, the moisture permeable film for sealing is a polymer film, has larger moisture permeability and more stable service life than the common moisture permeable paper, and can be regenerated in an integral heating mode.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The present invention is further illustrated by the following examples, which are not to be construed as limiting the invention.
Example 1
The embodiment provides a dehumidifying apparatus, including: the moisture absorbent is arranged in the container, and the moisture permeable film is arranged at the opening of the container;
the moisture absorbent is prepared by carrying out aqueous solution free radical polymerization reaction on 50 parts of calcium chloride, 30 parts of polyacrylamide, 0.5 part of ammonium persulfate and 0.7 part of N, N' -methylene bisacrylamide at 50 ℃ under the protection of nitrogen;
dissolving 30 parts of ketone anhydride and 30 parts of N, N-dimethylacetamide for 5 minutes; adding 1 part of sodium hydroxide and 15 parts of diisocyanate, and drying to obtain polyimide solid; the moisture permeable film is prepared by mixing and dissolving polyimide and N, N-dimethylacetamide (40:100) to obtain a casting solution, and performing film scraping treatment, drying and standing on the casting solution; the thickness of the moisture permeable film is 100 μm.
Example 2
The embodiment provides a dehumidifying apparatus, including: the moisture absorbent is arranged in the container, and the moisture permeable film is arranged at the opening of the container;
the moisture absorbent is prepared by carrying out aqueous solution free radical polymerization reaction on 80 parts of calcium chloride, 60 parts of polyacrylamide, 0.8 part of ammonium persulfate and 1.2 parts of N, N' -methylene bisacrylamide at 80 ℃ under the protection of nitrogen;
dissolving 40 parts of ketone anhydride and 50 parts of N, N-dimethylacetamide for 30 minutes; adding 3 parts of sodium hydroxide and 20 parts of diisocyanate, and drying to obtain polyimide solid; the moisture permeable film is prepared by mixing and dissolving polyimide and N, N-dimethylacetamide (110:100) to obtain a casting solution, and performing film scraping treatment, drying and standing on the casting solution; the thickness of the moisture permeable film is 200 μm.
Example 3
The embodiment provides a dehumidifying apparatus, including: the moisture absorbent is arranged in the container, and the moisture permeable film is arranged at the opening of the container;
the moisture absorbent is prepared by carrying out aqueous solution free radical polymerization reaction on 65 parts of calcium chloride, 45 parts of polyacrylamide, 0.65 part of ammonium persulfate and 0.95 part of N, N' -methylene bisacrylamide at 65 ℃ under the protection of nitrogen;
dissolving 35 parts of ketone anhydride and 40 parts of N, N-dimethylacetamide for 17.5 minutes; adding 2 parts of sodium hydroxide and 17.5 parts of diisocyanate, and drying to obtain polyimide solid; the moisture permeable film is prepared by mixing and dissolving polyimide and N, N-dimethylacetamide (75:100) to obtain a casting solution, and performing film scraping treatment, drying and standing on the casting solution; the thickness of the moisture permeable film is 150 μm.
In summary, the dehumidification device of the present invention adopts a passive moisture absorption method, the moisture absorbent is a composite gel moisture absorbent, has a special pore structure, is 2.5 times of the moisture absorption amount of the common calcium chloride moisture absorbent, the moisture permeable film for sealing is a polymer film, has a moisture permeability larger than that of the common moisture permeable paper and a more stable life, and can be regenerated by an overall heating method.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.
Claims (10)
1. A dehumidification apparatus, comprising: the moisture absorbent is arranged in the container, and the moisture permeable film is arranged at the opening of the container;
the moisture absorbent is prepared by carrying out aqueous solution free radical polymerization reaction on an additive, a polymerization main body, an initiator and a cross-linking agent in a protective gas environment;
the moisture permeable film is prepared by mixing and dissolving polyimide and N, N-dimethylacetamide to obtain a casting solution, and carrying out film scraping treatment, drying and standing on the casting solution; the thickness of the moisture permeable film is 100-200 μm.
2. The dehumidifying device of claim 1 wherein the moisture absorbent comprises, in parts by weight:
3. a dehumidifying device as claimed in claim 2 wherein the additive is calcium chloride.
4. A dehumidifying device as claimed in claim 2 wherein the polymeric body is polyacrylamide.
5. A dehumidifying device as claimed in claim 2 wherein the initiator is ammonium persulfate.
6. A dehumidifying device as claimed in claim 2 wherein the cross-linking agent is N, N' -methylenebisacrylamide.
7. The dehumidification apparatus according to claim 1, wherein a reaction temperature of the aqueous solution radical polymerization reaction is 50 ℃ to 80 ℃.
8. A dehumidifying device as claimed in claim 1 wherein the polyimide is prepared from a ketone anhydride, N-dimethylacetamide, a catalyst and a diisocyanate.
9. The dehumidification apparatus according to claim 8, wherein the polyimide is prepared by:
dissolving 30-40 parts of ketone anhydride and 30-50 parts of N, N-dimethylacetamide for 5-30 minutes; and adding 1-3 parts of sodium hydroxide, adding 15-20 parts of diisocyanate, and drying to obtain the polyimide solid.
10. A dehumidifying device as claimed in claim 1 wherein the mass ratio of polyimide to N, N-dimethylacetamide in the moisture-permeable membrane is (40-110): 100.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111554869.7A CN114210180A (en) | 2021-12-17 | 2021-12-17 | Dehumidifying device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111554869.7A CN114210180A (en) | 2021-12-17 | 2021-12-17 | Dehumidifying device |
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| Publication Number | Publication Date |
|---|---|
| CN114210180A true CN114210180A (en) | 2022-03-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111554869.7A Pending CN114210180A (en) | 2021-12-17 | 2021-12-17 | Dehumidifying device |
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| Country | Link |
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| CN (1) | CN114210180A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0576720A (en) * | 1991-09-19 | 1993-03-30 | S T Chem Co Ltd | Dehumidifying agent |
| JP2002212374A (en) * | 2000-11-14 | 2002-07-31 | Nippon Shokubai Co Ltd | Hygroscopic composition, hygroscopic agent and method for producing the same |
| CN101947416A (en) * | 2010-09-16 | 2011-01-19 | 华南理工大学 | High-selectivity asymmetric moisture-permeable film as well as preparation method and application thereof |
| CN103435802A (en) * | 2013-08-29 | 2013-12-11 | 宋琤 | Para-oriented diketoanhydride type polyimide TDPA-PI resin and production method thereof |
| CN109847541A (en) * | 2019-01-24 | 2019-06-07 | 中国人民解放军92228部队 | A kind of high efficiency composition hygroscopic agent and preparation method thereof |
-
2021
- 2021-12-17 CN CN202111554869.7A patent/CN114210180A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0576720A (en) * | 1991-09-19 | 1993-03-30 | S T Chem Co Ltd | Dehumidifying agent |
| JP2002212374A (en) * | 2000-11-14 | 2002-07-31 | Nippon Shokubai Co Ltd | Hygroscopic composition, hygroscopic agent and method for producing the same |
| CN101947416A (en) * | 2010-09-16 | 2011-01-19 | 华南理工大学 | High-selectivity asymmetric moisture-permeable film as well as preparation method and application thereof |
| CN103435802A (en) * | 2013-08-29 | 2013-12-11 | 宋琤 | Para-oriented diketoanhydride type polyimide TDPA-PI resin and production method thereof |
| CN109847541A (en) * | 2019-01-24 | 2019-06-07 | 中国人民解放军92228部队 | A kind of high efficiency composition hygroscopic agent and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 王澜等编著: "《高分子材料》", 中国轻工业出版社, pages: 177 * |
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