CN111419021B - Low-oxygen constant-humidity storage device and storage method thereof - Google Patents
Low-oxygen constant-humidity storage device and storage method thereof Download PDFInfo
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- CN111419021B CN111419021B CN202010318474.6A CN202010318474A CN111419021B CN 111419021 B CN111419021 B CN 111419021B CN 202010318474 A CN202010318474 A CN 202010318474A CN 111419021 B CN111419021 B CN 111419021B
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
- A47B81/00—Cabinets or racks specially adapted for other particular purposes, e.g. for storing guns or skis
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
- A47B63/00—Cabinets, racks or shelf units, specially adapted for storing books, documents, forms, or the like
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
- A47B97/00—Furniture or accessories for furniture, not provided for in other groups of this subclass
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01D2257/00—Components to be removed
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Abstract
The invention relates to a low-oxygen constant-humidity device, which comprises: a hermetic enclosure, wherein the volume of the hermetic enclosure is less than 20m 3 The method comprises the steps of carrying out a first treatment on the surface of the An oxygen scavenger; configured to adjust and maintain oxygen content within the airtight enclosure; humidity control and/or drying agents, comprising: a humidity regulator and/or desiccant configured to regulate and maintain the humidity within the airtight enclosure; and wherein the amount of the humidity control agent and/or desiccant and oxygen scavenger is based at least in part on the volume and tightness of the airtight enclosure. The application also relates to a regulating and controlling method of the low-oxygen constant-humidity device. The low-oxygen constant-humidity storage device and the storage method of the invention do not comprise an active oxygen-reducing humidity-controlling device, and can keep the oxygen concentration and the humidity in the airtight space in the storage cabinet constant without any ventilation equipment.
Description
Technical Field
The invention relates to a high-sealing environment air conditioning protection technology (Controlled Atmosphere technology of High Sealed environment, CAHS), in particular to a low-oxygen constant-humidity storage device and a storage method thereof.
Background
The storage of cultural relics, ancient books and other collections has high requirements on the oxygen content and humidity of the environment. At present, as the storage environment is not effectively controlled, some collections have the phenomena of mildew, aging and the like with different degrees. The consistent view in the prior art is that the gas in the storage space can be in a low-oxygen and constant-humidity state for a long time only by using an active low-oxygen constant-humidity conditioning technology, so that mildew and oxidization of the collection are effectively reduced, and the long-term storage of the collection is realized. However, the relatively high cost of active humidity control creates difficulties in popularization and application. Therefore, how to provide a more economical and convenient storage environment for a large number of collections is a problem in the art that needs to be solved.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides a low-oxygen constant-humidity storage device, which comprises: a hermetic enclosure, wherein the volume of the hermetic enclosure is less than 20m 3 The method comprises the steps of carrying out a first treatment on the surface of the An oxygen scavenger; configured to adjust and maintain oxygen content within the airtight enclosure; and a humidity control agent and/or desiccant configured to adjust and maintain the humidity within the airtight enclosure; wherein the amount of the oxygen scavenger and the humidity control agent and/or desiccant is based at least in part on the volume and tightness of the airtight enclosure。
The low-oxygen constant-humidity storage device, wherein the airtight enclosure has a volume of less than 10m 3 Less than 5m 3 Or less than 3m 3 。
The low-oxygen constant-humidity storage device, wherein the ventilation rate of the airtight enclosure is less than 0.05d -1 Or less than 0.02d -1 。
A low oxygen constant humidity storage device as described above, wherein the airtight enclosure has an oxygen content in a range of less than 2%; less than 1%; less than 0.5%; or 0.1% or less, and maintaining the oxygen content within the airtight enclosure within the oxygen content range for 10 days or more, 20 days or more, 50 days or more, 100 days or more, or 200 days or more.
The low oxygen constant humidity storage device as described above, wherein the oxygen scavenger is an iron-based oxygen scavenger or an organic-based type oxygen scavenger.
As described above, the amount of the oxygen scavenger used in the low-oxygen constant humidity storage device is calculated according to the following formula:
M 1 ＝A 1 ·A 2 ·V·(C 1 -C 2 )/Q+V·N·D·21％/Q
wherein M is 1 The amount of the deoxidizer is used; a is that 1 The air-tight enclosure structure influence coefficient is; a is that 2 Is a coefficient of stored articles; v is the volume of the air-conditioning space; c (C) 1 Is the initial oxygen content in the air-conditioned space; c (C) 2 The oxygen content is required in the air-conditioned space; q is oxygen absorption amount of the deoxidizer; n is the ventilation rate of the airtight enclosure structure, and D is the time required for low oxygen storage.
A low oxygen constant humidity storage device as described above wherein the humidity control agent and/or desiccant controls the relative humidity within the airtight enclosure to a target relative humidity; wherein the difference between the relative humidity within the airtight enclosure and the target relative humidity is less than 5%, or less than 3%, over a period of 10 days or more, 20 days or more, 50 days or more, 100 days or more, or 200 days or more.
The low-oxygen constant humidity storage device as described above, wherein the target humidity is in a range of 30% -80% of the relative humidity at 20-25 ℃.
The low-oxygen constant humidity storage device as described above, wherein the humidity controlling agent and/or the drying agent is used in an amount satisfying the following formula:
M 2 ＝A 3 ·K·V·(R lim -R 2 )·S/P；
wherein M is 2 For controlling the dosage of the wetting agent and/or the drying agent, A 3 Is the reference value of the dosage of the humidity control agent and/or the drying agent in unit volume under the standard sealing state, K is the humidity parameter, V is the airtight enclosure volume, R 2 For target relative humidity, R lim The humidity is the ambient limit humidity, S is the saturated humidity at the same temperature, and P is the water absorption rate of the humidity control agent and/or the desiccant.
A low oxygen constant humidity storage device as described above, wherein the amount of the humidity controlling agent and/or the drying agent is calculated according to the following formula:
M 2 ＝P 1 M 1 /P+A 3 ·K·V(R lim -R 2 )·S/P
wherein M is 2 The dosage of the moisture control agent and/or the drying agent is controlled; m is M 1 The amount of the deoxidizer is used; p (P) 1 Is the moisture release amount of the deoxidizer; p is the water absorption rate of the humidity control agent and/or the drying agent; a is that 3 Is the reference value of the dosage of the humidity control agent and/or the desiccant in unit volume under the standard sealing state; k is a humidity parameter; v is the volume of the airtight space; r is R lim Is the ultimate relative humidity; r is R 2 Is the target relative humidity; s is the saturated humidity at the same temperature.
The low-oxygen constant humidity storage device as described above, wherein the humidity controlling agent is a fiber type humidity controlling agent or a silica gel humidity controlling agent.
The low-oxygen constant-humidity storage device as described above, wherein the airtight enclosure is a rigid storage cabinet or showcase.
According to another aspect of the present invention, there is provided a storage method of the low-oxygen constant humidity storage device as described above, comprising: arranging articles to be treated and reserving a space between the articles to be treated; uniformly placing a humidity control agent and/or a drying agent; after the humidity control agent and/or the drying agent are/is placed, an oxygen scavenger is uniformly placed; and sealing the low-oxygen constant-humidity device immediately after placing the oxygen scavenger.
The method for storing the low-oxygen constant humidity as described above, further comprising: and checking or detecting the air tightness of the low-oxygen constant-humidity storage device.
The method for storing the low-oxygen constant humidity as described above, further comprising: in response to opening the low oxygen constant humidity storage means, all of the oxygen scavenger and humidity control agent and/or desiccant are removed and replaced; and resealing the hypoxic constant humidity apparatus.
The low-oxygen constant-humidity storage device and the storage method of the invention do not comprise an active oxygen-reducing humidity-controlling device, and can keep the oxygen concentration and the humidity in the airtight space in the storage cabinet constant without any ventilation equipment.
Drawings
Preferred embodiments of the present invention will be described in further detail below with reference to the attached drawing figures, wherein:
fig. 1 is a schematic structural view of a low-oxygen constant humidity storage device according to an embodiment of the present invention;
FIG. 2 is a schematic illustration of oxygen content variation within a low oxygen constant humidity storage device according to one embodiment of the present invention; and
fig. 3 is a schematic view showing a humidity change in the low-oxygen constant humidity storage device according to an embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of 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 some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the following detailed description, reference is made to the accompanying drawings, which form a part hereof, and in which is shown by way of illustration specific embodiments in which the application may be practiced. In the drawings, like reference numerals describe substantially similar components throughout the different views. Various specific embodiments of the present application are described in sufficient detail below to enable those skilled in the art to practice the teachings of the present application. It is to be understood that other embodiments may be utilized or structural, logical, or electrical changes may be made to the embodiments of the present application.
The invention relates to a low-oxygen constant-humidity storage device which has very high air tightness so as to ensure that the internal storage space of the storage device is highly isolated from the outside, and the influence of the outside oxygen and humidity change is avoided as much as possible. On the basis, the constant humidity storage device adopts a passive oxygen content and humidity regulation mode, namely, the low oxygen state and constant humidity in the storage space are ensured through the deoxidizer and the humidity control agent and/or the drying agent in the internal storage space.
Fig. 1 is a schematic view of a low oxygen constant humidity storage device according to an embodiment of the present invention. As shown in fig. 1, the storage device of the present embodiment is a rigid storage cabinet, including: a cabinet 101 and a cabinet door 102. The cabinet 101 and the door 102 form an airtight enclosure. The airtight enclosure has a volume of less than 20m 3 Or less than 10m 3 Or less than 5m 3 Preferably less than 3m 3 . In some embodiments, the airtight enclosure has a ventilation rate of 0.1d -1 Preferably less than 0.05d -1 Most preferably less than 0.02d -1 Wherein the tightness of the airtight enclosure is characterized by the ventilation rate, defined as the ratio of gas displacement within the airtight enclosure per day. For example, the ventilation rate is 0.1d -1 Meaning that 10% of the gas in the airtight enclosure is replaced by ambient gas every day. In some embodiments, the rigid storage cabinet further comprises a safety protection device 103 to ensure pressure stabilization within the airtight enclosure. In some embodiments, the rigid storage cabinet further includes an insulating layer to keep the temperature within the airtight enclosure less affected by the outside world. In some embodiments, the airtight enclosure may also be flexible without physical protection.
For the collection, it is desirable to maintain the oxygen concentration at a low level for a long period of time (e.g., 5 days or more, 10 days or more, 20 days or more, 50 days or more, 100 days or more, or 200 days or more). Therefore, on one hand, oxidation, corrosion and the like of the collection can be reduced, and on the other hand, insect prevention, insect killing, mildew prevention and bacteria inhibition can be realized.
An oxygen scavenger is included in the hermetic enclosure to control the oxygen content within the hermetic enclosure within a range. In some embodiments, the oxygen scavenger is capable of reducing the oxygen concentration within the hermetic enclosure to less than 1%, preferably to less than 0.1%, at room temperature (20-25 ℃). In some embodiments, the oxygen scavenger can be an iron-based or organic-based type oxygen scavenger.
In some embodiments, the amount of oxygen scavenger may be calculated according to the following formula:
M 1 ＝A 1 ·A 2 ·V·(C 1 -C 2 )/Q+V·N·D·21％/Q
wherein M is 1 The unit is kilogram (kg) of the deoxidizer; a is that 1 The air-tight enclosure structure influence coefficient is; a is that 2 Is a coefficient of stored articles; v is the volume of the air-conditioned space in cubic meters (m 3 )；C 1 The unit is percentage (%) of the initial oxygen content in the air-conditioned space; c (C) 2 The unit is percentage (%) for the oxygen content required in the air-conditioned space; q is oxygen absorption amount of the deoxidizer, and the unit is cubic meter/kg (m 3 /kg); n is the ventilation rate of the airtight enclosure structure, in units of (d -1 ) D is the time in days (D) for which hypoxia storage is required; wherein, the airtight enclosure structure coefficient A 1 Determining according to the type of the airtight enclosure: flexible structure with variable volume, A 1 Has a value of 1; for rigid structure A 1 Slightly greater than 1. Airtight envelope coefficient A 2 The value range is 0.2-1, depending on the type of articles stored in the airtight space and the space ratio.
The airtight enclosure comprises a humidity control agent and/or a drying agent. The humidity control agent can not only release humidity but also absorb moisture, and the drying agent can only absorb moisture. In some embodiments, a humidity control agent alone may be used to keep the humidity within the airtight enclosure constant. In some embodiments, particularly where the oxygen scavenger is wetted during the oxygen scavenging process, a desiccant may be used alone, in combination with the oxygen scavenger, to maintain a constant humidity within the airtight enclosure. In some embodiments, a humidity control agent and a desiccant may also be used in combination.
In some embodiments, the humidity control agent and/or desiccant is controlled in stages between 30% and 80% relative humidity at room temperature (20-25 ℃). The humidity control agent and/or desiccant is tailored to the actual desired relative humidity value (i.e., the target relative humidity value). That is, the user may select a certain humidity between 30% and 80% of the relative humidity as the target relative humidity. For the collection, it is necessary to keep humidity stable for a long period of time. In some embodiments, the humidity control agent and/or desiccant controls and stabilizes the relative humidity within the airtight enclosure at a target relative humidity; for example, the difference between the relative humidity within the airtight enclosure and the target relative humidity is less than 5%, or less than 3% over a period of 40 days or more, 100 days or more, 200 days or more, or 300 days or more.
In some embodiments, the desiccant may be a silica gel desiccant. The non-contaminating nature of silica gel desiccants makes them suitable for CAHS technology.
In some embodiments, the humidity control agent is a fibrous humidity control agent. The fiber type humidity control agent is a safe and environment-friendly humidity control agent which is composed of natural plant fibers and high polymer materials, and is harmless to collection and human bodies. In addition, the fiber type humidity control agent has high humidity capacity, high humidity control speed, balanced moisture absorption and moisture release and high humidity control precision; the fiber type humidity control agent has no dust or particle leakage, does not pollute airtight enclosure, and is very suitable for controlling the humidity of the cultural relic high-sealing microenvironment. In some embodiments, the fibrous humidity-regulating material is in the form of a card, so that the fibrous humidity-regulating material is convenient to match with a storage cabinet and is convenient to use. Of course, other types of humidity control agents known in the art may be used. In some embodiments, the humidity control agent may also be a silica gel type humidity control agent.
In some embodiments, the humidity control agent includes two types of humidity control agents, including, for example: a first type of humidity control agent adapted to maintain humidity in the airtight enclosure at a first humidity value; and a second type of humidity control agent adapted to neutralize the air-tight enclosureThe degree is maintained at a second humidity value. The humidity value in the airtight enclosure can be maintained at the target relative humidity R by properly regulating the proportion of the first humidity control agent and the second humidity control agent 2 Wherein R is 2 Between the first humidity value and the second humidity value. In some embodiments, the target relative humidity R 2 The range of (2) is between 30% and 80%.
In some embodiments, the amount of humidity control agent and/or desiccant can be calculated using the following formula:
M 2 ＝A 3 ·K·V·(R lim -R 2 )·S/P；
wherein M is 2 For controlling the dosage of the wetting agent and/or the drying agent, A 3 Is the reference value of the dosage of the humidity control agent and/or the drying agent in unit volume under the standard sealing state, K is the humidity parameter, V is the airtight enclosure volume, R 2 For target relative humidity, R lim The humidity is the ambient limit humidity, S is the saturated humidity at the same temperature, and P is the water absorption rate of the humidity control agent and/or the desiccant.
In some embodiments, the oxygen scavenger affects the humidity within the air-tight enclosure to some extent during the oxygen scavenging process, so it is desirable to appropriately adjust the amount of humidity control agent and/or desiccant based on the amount of oxygen scavenger within the air-tight enclosure. The amount of humidity control agent and/or desiccant is calculated according to the following formula:
M 2 ＝P 1 M 1 /P+A 3 ·K·V·(R lim -R 2 )·S/P
wherein M is 2 For controlling the amount of the moisture and/or drying agent, M 1 The unit of the oxygen scavenger is kilogram (kg); p (P) 1 The unit is percentage (%) of the moisture content of the deoxidizer; p is the water absorption of the humidity control agent and/or the drying agent, and the unit is percentage (%); k is the humidity parameter, V is the volume of the airtight space in cubic meters (m 3 )；R 1 The initial relative humidity is given in percent (%); r is R 2 For the target relative humidity, the units are percentages (%); s is the saturation humidity at the same temperature, and the unit is kilogram/cubic meter (kg/m) 3 )；A 3 Is in standard sealing stateAnd/or a desiccant usage reference.
In some embodiments, the hermetic enclosure has a tightness of 0.1d -1 When A in the formula 3 Has a value of about 0.8 to about 1.5kg/m 3 The amount of (3) used; the tightness of the airtight enclosure is about 0.05d -1 When A in the formula 3 Has a value of about 0.5 to about 1.0kg/m 3 The amount of (3) used; the air exchange rate of the airtight enclosure is 0.02d -1 The A is 3 About 0.1 to about 0.8kg/m 3 . Those skilled in the art will appreciate that the above is merely illustrative of A 3 Is a value of (a). Due to the effective volume of the airtight space, the arrangement mode of the humidity control agent and/or the drying agent, the relative stability of the ambient humidity and the like are all as for A 3 Has an influence on the value of A 3 The value of (c) may thus vary.
In some embodiments, the humidity control agent and/or the desiccant and oxygen scavenger may be placed in a storage box, placed within the airtight enclosure. The storage box is internally provided with a humidity control agent and/or a drying agent and an deoxidizing agent, and is uniformly placed so as to be beneficial to quickly adjusting the humidity of the airtight space.
In some embodiments, since the oxygen scavenger is a disposable consumable, once the airtight enclosure is opened, the oxygen scavenger needs to be replaced to re-perform the oxygen reduction treatment within the airtight enclosure. In addition, the oxygen scavenger can influence the humidity value in the airtight enclosure in the process of oxygen scavenging, and in some embodiments, the moisture control agent and/or the desiccant has limited water absorption capacity, so that the moisture control agent and/or the desiccant and the oxygen scavenger need to be replaced at the same frequency in order to ensure the humidity control precision.
The rigid storage cabinet of the embodiment does not comprise an active oxygen-reducing humidity-controlling device, and can keep the oxygen concentration and humidity in the airtight space in the storage cabinet constant without any ventilation equipment. Through the test of the inventor, the volume is 3m 3 The air exchange rate is 0.05d -1 The rigid constant humidity storage cabinet of (2) can keep the oxygen concentration below 2% and the humidity above one year constant by only using the deoxidizer and the humidity control agent and/or the drying agent. During this periodBesides the sensor for detecting oxygen content and temperature and humidity, the sensor does not consume electricity at all, greatly reduces the storage cost and is a revolution of the literature and insurance industry.
The low-oxygen constant-humidity storage device and the low-oxygen constant-humidity environment regulation method related to the invention are explained in detail below aiming at partial practical application scenes.
Example 1:
the low-oxygen constant-humidity rigid storage cabinet device is used for carrying out low-oxygen constant-humidity storage on the bronze ware. The volume of the low-oxygen constant-humidity storage cabinet is 3m 3 The air exchange rate is 0.02d -1 . An iron-based deoxidizer is selected for deoxidizing and the oxygen content is controlled below 2 percent. The iron-based deoxidizer has the advantages of no toxicity, no harm, low cost and the like. Silica gel desiccant is selected to control the humidity in the storage space. The target relative humidity was 30% ± 5%. The ambient humidity during storage was 68%, the temperature was 25 ℃, and the storage time was 6 months.
The amount of oxygen scavenger was calculated according to the following formula:
M 1 ＝A 1 ·A 2 ·V·(C 1 -C 2 )/Q+V·N·D·21％/Q；
wherein A is 1 ＝1.3，A 2 =1 (bronze ware occupies very little space and is therefore negligible), v=3m 3 ，C 1 ＝21％，C 2 ＝2％，Q＝0.12m 3 /kg，N＝0.02d -1 D=180 days. Calculated by the above formula, M 1 ≈25.4kg，
The amount of desiccant was calculated according to the following formula:
M 2 ＝P 1 M 1 /P+A 3 ·K·V·(R lim -R 2 )·S/P；
wherein P is 1 ＝6％，P＝35％，A 3 ＝0.6，K＝50，R lim ＝68％，R 2 ＝30％，S＝0.023kg/m 3 (saturated humidity at 25 ℃). Calculated by the above formula, M 2 ≈5.1kg。
The specific storage steps are as follows:
1. checking the air tightness of the low-oxygen constant-humidity storage cabinet to confirm that the ventilation rate can reach 0.02d -1 ；
2. Placing the bronze ware in a low-oxygen constant-humidity storage cabinet, arranging a diffusion type oxygen content sensor and a card type temperature and humidity sensor in the cabinet, and reading a detection result outside the cabinet;
3. uniformly placing 5.1kg of silica gel drying agent and then uniformly placing 25.4kg of deoxidizer, wherein the two are in no contact;
4. then, immediately sealing the low-oxygen constant-humidity storage cabinet; and
5. the cabinet door must not be opened during storage.
During the storage process of the embodiment, the oxygen content and humidity change in the constant humidity storage cabinet are monitored by an oxygen content sensor and a card type hygrothermograph in the low-oxygen constant humidity storage cabinet. The maximum oxygen content was 1.6% throughout the storage period, with a humidity variation range of 25.6% to 34.2%.
Example 2:
the low-oxygen constant-humidity rigid storage cabinet is adopted to perform low-oxygen constant-humidity insect killing on ancient books. The volume of the low-oxygen constant-humidity rigid storage cabinet is 2m 3 Ventilation rate 0.02d -1 . And (3) selecting an organic deoxidizer for deoxidizing, controlling the oxygen content to be 0.1% -1% or below 0.1%, and maintaining for 2 weeks. And a silica gel type drying agent is selected for humidity control, and the target relative humidity is 55+/-3%. The limit humidity of the environment is 80 percent, and the temperature is 20+/-5 ℃.
The amount of oxygen scavenger was calculated according to the following formula:
M 1 ＝A 1 ·A 2 ·V·(C 1 -C 2 )/Q+V·N·D·21％/Q；
wherein A is 1 ＝1.3，A 2 =0.5 (ancient books occupy 50% of the tank volume), v=2m 3 ，C 1 ＝21％，C 2 ＝0.1％，Q＝0.04m 3 /kg，N＝0.02d -1 D=14 days. Calculated by the above formula, M 1 ≈9.73kg。
The amount of desiccant was calculated according to the following formula:
M 2 ＝P 1 M 1 /P+A 3 ·K·V·(R lim -R 2 )·S/P；
wherein P is 1 ＝6％，P＝35％，A 3 ＝0.6，K＝50，R lim ＝80％，R 2 ＝55％，S＝0.023kg/m 3 (saturated humidity at 25 ℃); calculated by the above formula, M 2 ≈2.65kg。
The specific storage steps are as follows:
1. checking the air tightness of the low-oxygen constant-humidity storage cabinet to confirm that the ventilation rate can reach 0.02d -1 ；
2. Placing ancient books in a low-oxygen constant-humidity storage cabinet, wherein the ancient books are placed loose as much as possible to enlarge the contact area with low-oxygen gas in the cabinet, so that the low-oxygen gas can permeate into the ancient books; the diffusion type oxygen sensor and the card type temperature and humidity sensor are arranged in the cabinet, and the detection result can be read outside the cabinet;
3. uniformly placing 2.65kg of silica gel drying agent and 9.73kg of deoxidizer, wherein the two are in no contact;
4. immediately sealing the low-oxygen constant-humidity storage cabinet; and
5. the cabinet door must not be opened during storage.
During the storage process of the embodiment, the oxygen content change and the humidity change in the constant humidity storage cabinet are monitored by an oxygen content sensor and a card type hygrothermograph in the low-oxygen constant humidity storage cabinet. Fig. 2 shows the change in oxygen content in the low-oxygen constant humidity storage cabinet in this embodiment. FIG. 3 shows the humidity change in the low-oxygen constant humidity storage cabinet in the present embodiment; wherein the upper curve represents the humidity in the low-oxygen constant-humidity storage tank and the lower curve represents the temperature change in the low-oxygen constant-humidity storage tank.
As can be seen from fig. 2 and 3, the oxygen content in the storage cabinet is substantially zero during the storage period, creating a low oxygen environment suitable for storage; the humidity in the storage cabinet keeps high stability in the whole storage time, and the variation range is less than +/-3% of the target relative humidity value.
According to the embodiment of the invention, the low-oxygen constant-humidity storage device can maintain the low-oxygen environment and constant humidity in the airtight enclosure for a period of weeks or up to a plurality of months or more under the passive humidity control and oxygen control mode of only using the humidity control agent and/or the drying agent, so that long-term safe storage of cultural relics and other collections can be solved. From the viewpoint of cost, the storage cost of the low-oxygen constant humidity storage device is very low because an active oxygen control mode and a humidity control mode are not adopted. On the basis, the invention considers that the oxygen scavenger works and also affects the humidity in the storage space, and on the basis, the dosage of the humidity control agent and/or the drying agent is adjusted again, so that the humidity in the airtight enclosure is kept more accurate, the humidity is more approximate to an ideal condition, and the storage of articles in the airtight enclosure is facilitated. Therefore, the invention can solve the problem of low-cost storage of a large number of collections which are needed to be solved in the field of text preservation.
The application also relates to a regulating and controlling method of the low-oxygen constant-humidity device, which comprises the following steps:
step 31: checking the air tightness of the low-oxygen constant-humidity device, and ensuring that the tightness of the low-oxygen constant-humidity device meets the requirement;
step 32: arranging the articles to be treated, and keeping a space between the articles to be treated, wherein the placing is not too tight;
step 33: uniformly placing a humidity control agent and/or a drying agent, wherein the dosage of the humidity control agent and/or the drying agent can be calculated according to a formula in the text;
step 34: uniformly placing the deoxidizer, wherein the dosage of the deoxidizer can be calculated according to the formula, and a certain gap is reserved between the humidity control agent and/or the drying agent and the deoxidizer;
step 35: immediately sealing the low-oxygen constant-humidity device after the humidity control agent and/or the drying agent and the deoxidizing agent are placed; and
step 36: and if the low-oxygen constant-humidity storage device is opened, taking out and replacing all the deoxidizer, the humidity control agent and/or the drying agent, and resealing the low-oxygen constant-humidity device.
The conventional oxygen reduction method adopts a nitrogen making machine or a nitrogen cylinder, is not easy to carry, occupies large area and has certain potential safety hazard for high-voltage equipment. The low-oxygen constant-humidity storage method provided by the invention does not need extra equipment, does not need power supply and has no noise; the device can be widely applied to low-oxygen disinfestation of cultural relics and books and archives, and the long-term constant-humidity low-oxygen storage and exhibition of fragile colleges, and is particularly suitable for occasions requiring periodic power failure, such as inconvenient transportation, unsuitable installation of large-scale equipment or museums. The technology disclosed by the invention can also be applied to long-term storage of the insect-damaged articles such as Chinese herbal medicines, and has the characteristics of no toxicity, environmental protection, no residue, simple operation, no drug resistance of pests and the like.
The above embodiments are provided for illustrating the present invention and not for limiting the present invention, and various changes and modifications may be made by one skilled in the relevant art without departing from the scope of the present invention, therefore, all equivalent technical solutions shall fall within the scope of the present disclosure.
Claims (12)
1. A low oxygen constant humidity storage device comprising:
a hermetic enclosure, wherein the volume of the hermetic enclosure is less than 20m 3 ；
An oxygen scavenger; configured to adjust and maintain oxygen content within the airtight enclosure; and
a humidity control agent and/or desiccant configured to adjust and maintain the humidity within the airtight enclosure;
wherein the amount of oxygen scavenger and humidity control agent and/or desiccant is based at least in part on the volume and tightness of the airtight enclosure;
the amount of oxygen scavenger is calculated according to the following formula:
M 1 ＝A 1 ·A 2 ·V·(C 1 -C 2 )/Q+V·N·D·21％/Q；
the amount of the humidity control agent and/or the drying agent is calculated according to the following formula:
M 2 ＝P 1 M 1 /P+A 3 ·K·V(R lim -R 2 )·S/P；
wherein M is 1 The amount of the deoxidizer is used; a is that 1 The air-tight enclosure structure influence coefficient is; a is that 2 Is a coefficient of stored articles; v is the volume of the air-conditioning space; c (C) 1 Is the initial oxygen content in the air-conditioned space; c (C) 2 The oxygen content is required in the air-conditioned space; q is oxygen absorption amount of the deoxidizer; n is the ventilation rate of the airtight enclosure structure; d is the time required for hypoxia storage; m is M 2 The dosage of the moisture control agent and/or the drying agent is controlled; p (P) 1 Is the moisture release amount of the deoxidizer; p is the water absorption rate of the humidity control agent and/or the drying agent; a is that 3 Is the reference value of the dosage of the humidity control agent and/or the desiccant in unit volume under the standard sealing state; k is a humidity parameter; r is R lim Is the ultimate relative humidity; r is R 2 Is the target relative humidity; s is the saturated humidity at the same temperature.
2. The low oxygen constant humidity storage device according to claim 1, wherein the airtight enclosure has a volume of less than 10m 3 Less than 5m 3 Or less than 3m 3 。
3. The low oxygen constant humidity storage device according to claim 1, wherein the airtight enclosure has a ventilation rate of less than 0.05d -1 Or less than 0.02d -1 。
4. The hypoxic constant humidity storage apparatus as claimed in claim 1, wherein the range of oxygen content of the airtight enclosure is less than 2%; less than 1%; less than 0.5%; or 0.1% or less, and maintaining the oxygen content in the airtight enclosure within the oxygen content range for 5 days or more, 10 days or more, 20 days or more, 50 days or more, 100 days or more, or 200 days or more.
5. The low oxygen constant humidity storage device according to claim 4, wherein the oxygen scavenger is an iron-based oxygen scavenger or an organic-based type oxygen scavenger.
6. The low oxygen constant humidity storage device of claim 1, wherein the humidity control agent and/or desiccant controls the relative humidity within the airtight enclosure to a target relative humidity; wherein the difference between the relative humidity within the airtight enclosure and the target relative humidity is less than 5%, or less than 3%, over a period of 10 days or more, 20 days or more, 50 days or more, 100 days or more, or 200 days or more.
7. The low-oxygen constant humidity storage device according to claim 6, wherein the target humidity ranges from 30% to 80% of the relative humidity at 20 to 25 ℃.
8. The low-oxygen constant humidity storage device according to claim 7, wherein the humidity controlling agent is a fiber type humidity controlling agent or a silica gel type humidity controlling agent.
9. The low oxygen constant humidity storage device of claim 1, wherein the airtight enclosure is a rigid storage cabinet or showcase.
10. A storage method of the low-oxygen constant humidity storage device according to any one of claims 1 to 9, comprising:
arranging articles to be treated and reserving a space between the articles to be treated;
uniformly placing a humidity control agent and/or a drying agent;
after the humidity control agent and/or the drying agent are/is placed, an oxygen scavenger is uniformly placed; and
and immediately sealing the low-oxygen constant-humidity device.
11. The storage method of the low-oxygen constant humidity storage device according to claim 10, further comprising: and checking or detecting the air tightness of the low-oxygen constant-humidity storage device.
12. The storage method of the low-oxygen constant humidity storage device according to claim 10, further comprising: in response to opening the low oxygen constant humidity storage means, all of the oxygen scavenger and humidity control agent and/or desiccant are removed and replaced; and resealing the hypoxic constant humidity apparatus.
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| CN111802349A (en) * | 2020-08-17 | 2020-10-23 | 天津森罗科技股份有限公司 | Low-oxygen modified atmosphere insecticidal system |
| BE1028780B1 (en) * | 2020-11-09 | 2022-06-07 | Katoen Natie Art Logistics Nv | APPARATUS AND PROCEDURE FOR OPTIMAL STORAGE OF ARTIFICIAL OBJECTS BY CONTROL OF HUMIDITY AND TEMPERATURE |
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