CN112369399A

CN112369399A - Using method of multi-room low-oxygen controlled atmosphere curing insecticidal storehouse

Info

Publication number: CN112369399A
Application number: CN202011257590.8A
Authority: CN
Inventors: 不公告发明人
Original assignee: Tianjin CNRO Science Technology Co Ltd
Current assignee: Tianjin CNRO Science Technology Co Ltd
Priority date: 2020-11-11
Filing date: 2020-11-11
Publication date: 2021-02-19
Anticipated expiration: 2040-11-11
Also published as: CN112369399B

Abstract

The invention relates to a using method of a multi-room low-oxygen controlled atmosphere curing insecticidal storehouse, which comprises the following steps: transporting the articles to a first storehouse and stacking the articles, wherein the distance between the articles or the distance between the articles and the wall is at least 100-500 mm; sealing the first storehouse, starting a nitrogen making system to fill nitrogen and reduce oxygen for the first storehouse, and simultaneously stacking and sealing articles in the second storehouse; when the oxygen content in the first storehouse reaches a first threshold value, switching the nitrogen making system to a second storehouse, and filling nitrogen to reduce oxygen in the second storehouse; and when the oxygen content in the second storehouse reaches the first threshold value, communicating the nitrogen making system with the first storehouse or the second storehouse again, and circulating in sequence until the oxygen content in all the storehouses is reduced to a preset value. The method improves the efficiency of controlled atmosphere maintenance by optimizing the flow of the controlled atmosphere maintenance and the insect killing method and adopting a stepped nitrogen-filling and oxygen-reducing mode; in addition, a protection device is added in the storehouse, so that the storehouse is guaranteed to be forbidden to open the airtight door under a low-oxygen environment, and the harm to the body of a person is avoided.

Description

Using method of multi-room low-oxygen controlled atmosphere curing insecticidal storehouse

Technical Field

The invention relates to the field of low-oxygen controlled atmosphere curing, in particular to a using method of a multi-room low-oxygen controlled atmosphere curing insecticidal storehouse.

Background

Modified atmosphere storage of hypoxia and insecticidal techniques are increasingly being used. The traditional Chinese medicinal materials, tobacco, cultural relics, books, files and other articles can be subjected to insect killing, insect prevention, mildew prevention and bacteriostasis and long-term safe storage by a low-oxygen modified atmosphere storage technology; and the method has the advantages of no toxicity, environmental protection, safety, rapidness, economy, effectiveness, simple operation and the like.

When the types and the quantity of the stored articles are too large, the articles can be stored in a plurality of storerooms. However, when oxygen reduction and adjustment are carried out in a plurality of storehouses, a plurality of sets of air adjustment equipment are required to simultaneously carry out oxygen reduction and adjustment, and huge financial resources are consumed; or the oxygen reduction and air conditioning are performed in sequence, so that the air conditioning time is long and the working efficiency is low. There is a need for an effective method to solve the above problems.

Disclosure of Invention

Aiming at the technical problems in the prior art, the invention provides a using method of a multi-room low-oxygen controlled atmosphere curing insecticidal storehouse, which comprises the following steps: transporting the articles to a first storehouse and stacking the articles, wherein the distance between the articles or the distance between the articles and the wall is at least 100-500 mm; sealing the first storehouse, starting a nitrogen making system to fill nitrogen and reduce oxygen for the first storehouse, and simultaneously stacking and sealing articles in the second storehouse; when the oxygen content in the first storehouse reaches a first threshold value, switching the nitrogen making system to a second storehouse, and filling nitrogen to reduce oxygen in the second storehouse; and when the oxygen content in the second storehouse reaches the first threshold value, communicating the nitrogen making system with the first storehouse or the second storehouse again, and circulating in sequence until the oxygen content in all the storehouses is reduced to a preset value.

The method as described above, wherein the first threshold is 0.1% -10%.

The method as described above, wherein the preset value of oxygen content for modified atmosphere curing is 2% -10%; for disinsection, the preset value of oxygen content is 0.1% -2%, preferably, the preset value of oxygen content is 0.1% -0.5%.

According to the method, when the oxygen content in the first storehouse reaches the first threshold value and the second storehouse needs to be continuously deoxygenated, the air outlet and the air inlet of the second storehouse are opened first, and then the air inlet and the air outlet of the first storehouse are closed.

According to the method, when the oxygen content in the first storehouse reaches the first threshold value and the second storehouse needs to be continuously deoxygenated, nitrogen is firstly vented, the air inlet and outlet of the first storehouse is closed, and then the air outlet and the air inlet of the second storehouse are opened.

The method as described above, further comprising: when the oxygen content in the second storehouse reaches a first threshold value, communicating the nitrogen making system with a third storehouse, and filling nitrogen to reduce oxygen in the third storehouse; and when the oxygen content in the third storehouse reaches the first threshold value, communicating the nitrogen production system with the first storehouse, the second storehouse or the third storehouse again, and reducing the oxygen content in the first storehouse, the second storehouse or the third storehouse to a preset value.

The method as described above, wherein when the oxygen reduction is performed in a circulating manner in the plurality of storehouses, the first storehouse is the storehouse currently undergoing the oxygen reduction replacement, and the second storehouse is the next storehouse which is not yet reaching the preset value and is about to need the oxygen reduction.

The method as described above, wherein the storeroom is divided into one or more groups according to different storage parameters required by different articles; when the plurality of groups of storehouses carry out circulating oxygen reduction, the first storehouse is the first group of storehouses which are currently carrying out oxygen reduction replacement, and the second storehouse is the next group of storehouses which are not up to the preset value and are about to need oxygen reduction.

The method as described above, wherein the air exchange rate of the storehouse is less than or equal to 0.2/d, preferably less than or equal to 0.05/d.

The method as described above, wherein the number of said plurality of warehouses is 2 or more.

The method as described above, further comprising: and (4) performing ventilation and oxygenation operation on the storehouse, increasing the oxygen content of the storehouse to be more than 17% within 0.5-2 hours, stopping oxygenation, and allowing the door of the storehouse to be opened.

The method improves the efficiency of controlled atmosphere maintenance by optimizing the flow of the controlled atmosphere maintenance and the insect killing method and adopting a stepped nitrogen-filling and oxygen-reducing mode; in addition, the storehouse is additionally provided with a protection device, so that the airtight door is forbidden to be reached under the low-oxygen environment in the storehouse, and the harm to the body of a person is avoided.

Drawings

Preferred embodiments of the present invention will now be described in further detail with reference to the accompanying drawings, in which:

FIG. 1 is a schematic diagram of a system for modified atmosphere maintenance and disinsection of multi-storeroom articles according to an embodiment of the present invention; and

fig. 2 is a flow chart of a method for using the multi-storeroom for controlled atmosphere maintenance and disinsection of goods according to one embodiment of the invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. 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.

In the following detailed description, reference is made to the accompanying drawings that form a part hereof and in which is shown by way of illustration specific embodiments of the application. In the drawings, like 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 and structural and logical changes may be made to the embodiments of the present application.

FIG. 1 is a schematic diagram of a system for modified atmosphere curing and disinsection of multi-storeroom products according to an embodiment of the invention. As shown in the figure, the system comprises a first storehouse 140, a second storehouse 150 and a third storehouse 160 which are connected with each other through a pipeline provided with an air guide valve, and the air guide valve is opened, namely is conducted, and is disconnected otherwise. In some embodiments, the oxygen reduction of each storehouse is performed independently without an intermediate pipeline. Wherein the nitrogen making system 110, the humidity control system 120 and the oxygen increasing system 130 are hermetically connected with the first warehouse 140, the second warehouse 150 and the third warehouse 160, respectively. The first, second and third repositories 140, 150, 160 each include a low oxygen indicator (141, 151, 161), a low oxygen lock (142, 152, 162), an oxygen content detection device (143, 153, 163) and an air-tight door (144, 154, 164). The first warehouse 140, the second warehouse 150, and the third warehouse 160 may have the same or different structures, and are not limited herein.

Nitrogen generation system 110 includes, but is not limited to, nitrogen generation equipment, air compression systems, filtration purification systems, gas distribution detection, which are used to reduce the oxygen content in the storage. The oxygen reduction system 110 is hermetically connected to a first warehouse 140, a second warehouse 150, and a third warehouse 160, respectively. When the oxygen reduction is carried out on the storehouse, the air inlet valve and the air outlet valve are opened, the nitrogen system 110 is utilized to fill nitrogen into the storehouse body, the internal oxygen is replaced, and the purpose of reducing the oxygen content is achieved.

The humidity control system 120 is used to control humidity in the storage, and is hermetically connected to the first storage 140, the second storage 150, and the third storage 160, respectively. In response to the humidity in the storage exceeding or falling below a set threshold, humidity control system 120 adjusts the humidity within the storage to be within a set range. The humidity control system 120 may be installed inside the warehouse or outside the warehouse, which is not limited herein. The humidity control system 120 is controlled in an isenthalpic humidifying mode, the control precision is less than or equal to +/-5%, and the stability is good. In some embodiments, the humidity control system 120 controls the relative humidity in the warehouse to be 20% -80%.

The oxygen increasing system 130 is used to increase the oxygen content inside the storehouse, and is hermetically connected to the first, second and third storehouses 140, 150 and 160, respectively. The oxygenation system 130 may be a fan, an air compressor, or other devices that can supplement air to the warehouse, which is not limited herein. The storeroom comprises one or more oxygen content detection devices for detecting the oxygen content in the storeroom. In response to the oxygen content in the warehouse being lower than the set threshold, the oxygen increasing system 130 operates to perform oxygen increasing operation.

According to one embodiment of the present application, the depot further comprises a low oxygen indicator (141, 151, 161) and a low oxygen lock (142, 152, 162). In response to a user wanting to open the airtight door, if the oxygen content in the warehouse is below a safe threshold, the low oxygen indicator gives an alarm and the low oxygen lock is in a closed state, so that the airtight door cannot be opened. Meanwhile, the oxygenation system 130 is started to perform oxygenation operation on the interior of the storehouse, and the oxygen content in the storehouse is increased until the oxygen content is greater than or equal to the safety threshold. In response to the oxygen content in the storehouse being greater than or equal to the safety threshold, the low oxygen indicator stops giving the alarm and the low oxygen lock is in an open state.

Fig. 2 is a flow chart of a method for using the multi-storeroom for controlled atmosphere maintenance and disinsection of goods according to one embodiment of the invention. At step 210, a check is made of the warehouse; at step 220, the item is shipped to the first warehouse. Wherein the inspection includes at least equipment, storage, system power supply, and identification. The system for controlled atmosphere maintenance and disinsection consists of a plurality of devices and storehouses, and the normal work of the devices is the basis for the successful controlled atmosphere maintenance. Therefore, before the system works, various devices can be ensured to operate normally and set values are correct. And after the storeroom is checked to be correct, the articles are conveyed into the first storeroom. In some embodiments, the articles stored in the warehouse are numbered in sequence, and information such as names, warehousing time, quantity, pest killing time and the like of the articles is marked, so that the follow-up work of workers is facilitated.

In step 230, items are stacked in the first warehouse, with at least 100 and 500mm between items or from the wall. When the articles are placed, a gap is left, so that free circulation of gas can be ensured, and the aim of quickly reducing oxygen is fulfilled. And the oxygen is distributed evenly, thus ensuring the drug effect and quality of the article. Wherein, the article can be one or more of traditional Chinese medicinal materials, tobacco, cultural relics, books and archives.

At step 240, the first storage room is sealed and nitrogen-filled to reduce oxygen, and simultaneously, the second storage room and the third storage room are sequentially stacked and sealed. After the first storehouse is placed with the articles, the airtight door threshold is installed, the door threshold is ensured to be in close contact with the fixed bottom plate, the airtight door is closed, the sealing rubber strip between the door and the door frame is in an extrusion state, and good air tightness of the storehouse is ensured. And opening the air inlet valve and the air outlet valve after the storehouse is sealed, and starting the nitrogen making system to perform nitrogen filling replacement on the first storehouse. At the same time, the second storage room is filled with the articles and sealed.

In step 250, when the oxygen content in the first storehouse reaches a first threshold value, the nitrogen making system is communicated with the second storehouse, the second storehouse is filled with nitrogen and oxygen is reduced, and meanwhile, the goods stacking and the storehouse body sealing of the next storehouse are completed. Wherein the first threshold is 0.1% -10%. When the oxygen content in the storehouse is reduced to 10% or below, the effect of maintaining the articles can be achieved. In some embodiments, when the oxygen content in the first storehouse reaches the first threshold value and the second storehouse needs to be deoxygenated continuously, the air outlet and the air inlet of the second storehouse are opened first, and then the air inlet and the air outlet of the first storehouse are closed; in other embodiments, when the oxygen content in the first storage room reaches the first threshold value and the second storage room needs to be deoxygenated, the nitrogen gas is vented first, then the air inlet and outlet of the first storage room are closed, and then the air outlet and air inlet of the second storage room are opened.

In step 260, when the oxygen content in the second storehouse reaches the first threshold, the nitrogen making system is communicated with the third storehouse, and the third storehouse is filled with nitrogen and reduced in oxygen. And after the oxygen content in the second storehouse reaches a first threshold value, filling nitrogen into a third storehouse and closing a channel between the nitrogen making system and the second storehouse. In some embodiments, the air exchange rate of the multi-storeroom, i.e. the plurality of storerooms which are subjected to controlled atmosphere maintenance simultaneously, is less than or equal to 0.2/d, preferably less than or equal to 0.05/d, and the number of the multi-storeroom is 2 or more. The method is described by taking 3 storehouses as an example, but the method is not limited to 3 storehouses.

In step 270, when the oxygen content in the third warehouse reaches the first threshold value, the nitrogen production system is communicated with the first warehouse, the second warehouse or the third warehouse again, and circulation is performed in sequence until the oxygen content in all the warehouses is reduced to the preset value. In some embodiments, the preset value of oxygen content is between 2% and 10%. The storage purpose is divided into modified atmosphere conservation and modified atmosphere disinsection according to the variety and batch of the articles. The quality of the product is not changed by controlled atmosphere maintenance, so that the purpose can be achieved when the oxygen content is 2-10%; when the pests in the goods need to be killed, the oxygen content needs to reach 0.1% -2%, preferably, the preset oxygen content is 0.1% -0.5%, so that the pests are suffocated. In some embodiments, in the process of filling nitrogen and reducing oxygen to reach the preset value in the first storehouse, the second storehouse or the third storehouse, the first storehouse and the second storehouse or the second storehouse and the third storehouse are disconnected, and the oxygen content of the first storehouse and the second storehouse or the second storehouse and the third storehouse is respectively reduced to the preset value.

In some embodiments, when the oxygen reduction is performed in a circulating manner in a plurality of storehouses, the first storehouse is a storehouse currently undergoing oxygen reduction replacement, and the second storehouse is a next storehouse which is not yet reaching the preset value and is about to need the oxygen reduction; in other embodiments, the warehouses are divided into one or more groups according to different storage parameters required by different articles; when the plurality of groups of storehouses carry out circulating oxygen reduction, the first storehouse is the first group of storehouses which are currently carrying out oxygen reduction replacement, and the second storehouse is the next group of storehouses which are not up to the preset value and are about to need oxygen reduction. Wherein the storage parameters include, but are not limited to, oxygen content, temperature, humidity, and the like. The articles are classified and stored according to different storage parameters, so that the articles are guaranteed not to change quality.

When the storehouse is adopted for insecticidal treatment, the insecticidal effect is achieved only under the condition of low oxygen content, so that the oxygen reduction mode that the oxygen content is reduced to the preset value at one time is adopted, and the insecticidal efficiency is improved. In some embodiments, the warehousing of the articles in the multiple storehouses and the sealing of the storehouses are coordinated with the oxygen reduction, that is, after the warehousing, the placing and the sealing of the articles in one storehouse are finished each time, the oxygen reduction is carried out on the storehouse, and the placing of the articles in the next storehouse and the sealing of the storehouses are finished in the period, so that the working efficiency is improved.

In some embodiments, the nitrogen charging system oxygen reduction process can be set, and the system can automatically perform oxygen reduction according to the set oxygen reduction process after the setting.

And entering an oxygen content maintaining stage after the oxygen content of the multiple storehouses is reduced to a set value. In the oxygen content maintenance stage, the detection device detects the oxygen content, the humidity and the like in each storehouse at regular time, and if the oxygen content, the humidity and the like exceed the set range, the nitrogen making system and the humidity control system can be immediately adjusted, so that the oxygen content, the humidity and other indexes in each storehouse are ensured to be in the preset range. In the maintenance phase, personnel safety patrols should be scheduled. The inspection contents include safety inspection of equipment and storeroom, safety identification, low oxygen state display, equipment operation condition, oxygen content maintaining state in storeroom and the like, and are signed and recorded.

The traditional maintenance operation method by the controlled atmosphere method has no clear relevant operation specifications, and researches show that in a low oxygen state: the oxygen content is 15-19%, so that the working capacity of people is reduced and the people are lack of strength; the oxygen content is 12 to 14 percent, so that the breath is rapid, the pulse is accelerated, and the coordination and perception capability is reduced; the oxygen content is 10-12%, so that the breath of people is weakened, and the lips are blue-purple; the oxygen content is 8 to 10 percent, so that people have unconsciousness, faint, dark and grey complexion, nausea and vomiting; under the conditions that the oxygen content is 6-8% and the time is more than or equal to 8 minutes, 100% of people die. Therefore, it is important to define the operation flow of the hypoxic environment.

The oxygen increasing system, the low oxygen indicator and the low oxygen lock are installed to guarantee the safety of workers. The specific operation is as follows: before opening the storehouse, check whether the low oxygen indicator sends out the warning message. Responding to the low oxygen indicator to send out warning, starting an oxygenation system, and carrying out oxygenation operation on the storeroom needing to be opened; and the oxygen content of the storehouse is increased to more than 17% within 0.5-2 hours, the oxygen increasing system stops working, the low oxygen indicator is closed, the low oxygen lock is in an open state, and the airtight door is allowed to be opened.

After the airtight door is opened, the articles are sequentially taken out and conveyed to a designated place to be independently stored in a dark place and in a sealed way with untreated articles, so that secondary pollution and insect growth are prevented. After the articles in the storehouse are moved, the pests and the article residues on the ground of the storehouse are cleaned, and after the cleaning is finished, ventilation is carried out, and the pest killing treatment or the modified atmosphere storage of the next batch of articles is carried out.

The mode of adopting the ladder to reduce oxygen in this application can improve the efficiency of article maintenance. It is known that the average time for reducing the oxygen in the storehouse to 2% with nitrogen gas having a purity of 98% is 16 hours. The nitrogen purity of the nitrogen making system can be adjusted, such as 93%, 95%, 98%, 99% and the like, and the lower the nitrogen purity is, the faster the gas outlet rate is. In the scheme of the application, the average time for reducing the oxygen in the storehouse to 7% by using the nitrogen concentration with the purity of 95% is 4.5 hours; the oxygen in the storehouse was reduced from 7% to 2% using nitrogen gas with a purity of 99% for 11 hours on average. Taking 5 storehouses for nitrogen filling and oxygen reduction as an example, the total time of step oxygen reduction is 77.5 hours, and the total time of step oxygen reduction is 80 hours in a way of reducing to the end, wherein the time of the step oxygen reduction is 2.5 hours less than that of the step oxygen reduction; and the effect of overall article maintenance can be achieved only by 22.5 hours by utilizing a step oxygen reduction mode, so that the efficiency of article maintenance is improved.

The above embodiments are provided only for illustrating the present invention and not for limiting the present invention, and those skilled in the art can make various changes and modifications without departing from the scope of the present invention, and therefore, all equivalent technical solutions should fall within the scope of the present invention.

Claims

1. A using method of a multi-room low-oxygen controlled atmosphere curing insecticidal storehouse comprises the following steps:

transporting the articles to a first storehouse and stacking the articles, wherein the distance between the articles or the distance between the articles and the wall is at least 100-500 mm;

sealing the first storehouse, starting a nitrogen making system to fill nitrogen and reduce oxygen for the first storehouse, and simultaneously stacking and sealing articles in the second storehouse;

when the oxygen content in the first storehouse reaches a first threshold value, switching the nitrogen making system to a second storehouse, and filling nitrogen to reduce oxygen in the second storehouse;

and when the oxygen content in the second storehouse reaches the first threshold value, communicating the nitrogen making system with the first storehouse or the second storehouse again, and circulating in sequence until the oxygen content in all the storehouses is reduced to a preset value.

2. The method of claim 1, wherein the first threshold is 0.1% -10%.

3. The method according to claim 1, wherein the preset value of oxygen content for modified atmosphere curing is between 2% and 10%; for disinsection, the preset value of oxygen content is 0.1% -2%, preferably, the preset value of oxygen content is 0.1% -0.5%.

4. The method of claim 1, wherein when the second storage room is required to be deoxygenated after the oxygen content in the first storage room reaches the first threshold, the air outlet and the air inlet of the second storage room are opened first, and then the air inlet and the air outlet of the first storage room are closed.

5. The method of claim 1, wherein when the oxygen content in the first storage room reaches the first threshold value and the second storage room is required to be deoxygenated, the nitrogen gas is vented, the air inlet and outlet of the first storage room are closed, and the air outlet and inlet of the second storage room are opened.

6. The method of claim 1, further comprising: when the oxygen content in the second storehouse reaches a first threshold value, communicating the nitrogen making system with a third storehouse, and filling nitrogen to reduce oxygen in the third storehouse; and when the oxygen content in the third storehouse reaches the first threshold value, communicating the nitrogen production system with the first storehouse, the second storehouse or the third storehouse again, and reducing the oxygen content in the first storehouse, the second storehouse or the third storehouse to a preset value.

7. The method of claim 1, wherein when the plurality of stores are cycled to reduce oxygen, the first store is a store currently undergoing oxygen reduction replacement, and the second store is a next store to be reduced in oxygen.

8. The method of claim 1, wherein the storage is divided into one or more groups according to the storage parameters required for different items; when the plurality of groups of storehouses carry out circulating oxygen reduction, the first storehouse is the first group of storehouses which are currently carrying out oxygen reduction replacement, and the second storehouse is the next group of storehouses which are not up to the preset value and are about to need oxygen reduction.

9. The method according to claim 1, wherein the air exchange rate of the depot is less than or equal to 0.2/d, preferably less than or equal to 0.05/d.

10. The method of claim 7, wherein the number of said plurality of repositories is 2 or more.

11. The method of claim 1, further comprising: and (4) performing ventilation and oxygenation operation on the storehouse, increasing the oxygen content of the storehouse to be more than 17% within 0.5-2 hours, stopping oxygenation, and allowing the door of the storehouse to be opened.