CN208597358U - A kind of low energy consumption nitrogen filling grain storage system - Google Patents
A kind of low energy consumption nitrogen filling grain storage system Download PDFInfo
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- CN208597358U CN208597358U CN201821037194.2U CN201821037194U CN208597358U CN 208597358 U CN208597358 U CN 208597358U CN 201821037194 U CN201821037194 U CN 201821037194U CN 208597358 U CN208597358 U CN 208597358U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/51—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture specially adapted for storing agricultural or horticultural products
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Abstract
The utility model discloses a kind of low energy consumption nitrogen filling grain storage system, the system comprises: air intake pipe, heat exchanger, the first nitrogen-rich device and silo；The pipeline that the air intake pipe is connect with the first nitrogen-rich device inlet end passes through inside the heat exchanger；The outlet side of the first nitrogen-rich device is connect with the silo；The infiltration gas outlet pipe of the first nitrogen-rich device passes through inside the heat exchanger.Using the utility model embodiment, the energy consumption of nitrogen grain storage system can be reduced.
Description
Technical field
The utility model relates to a kind of grain storage systems, are more particularly to a kind of low energy consumption nitrogen filling grain storage system.
Background technique
China is a populous nation, and the consumption of grain is very huge, therefore grain preparation is the important set of national strategy
At part.Country all pays much attention to grain reserves work, and infrastructure, equipment and the deposit of grain reserves all the time
Technology and quality are not stopping paying out exhibition and raising.In recent years, it as the index of environmental protection, health is continuously improved, has emerged in large numbers many new
Grain reserves technology, such as low-temperature grain-storage, chemical grain storage, air-conditioning storing grain etc..The time of grain reserves and quality all mention significantly
It is high.
Currently, obtaining most widely used for air-conditioning storing grain, principle is replaced using nitrogen or carbon dioxide gas
Air in grain storage equipment, adjust grain storage environment in oxygen content, by the oxygen content of grain ambient gas be reduced to 2% with
Interior, under low-oxygen environment, most pests and worm's ovum are killed, while under low-oxygen environment, the breathing of foodstuff seed
Effect almost stops, and time and the quality of grain preservation is greatly improved.Such method is nontoxic, noresidue, and stored grain quality is relatively high.
But the energy consumption of existing air-conditioning storing grain system is higher.
Utility model content
The technical problem to be solved by the utility model is to provide a kind of low energy consumption nitrogen filling grain storage systems, existing to solve
There is in technology the excessively high technical problem of energy consumption in grain storage system.
The utility model is to solve above-mentioned technical problem by the following technical programs:
The utility model embodiment provides a kind of low energy consumption nitrogen filling grain storage system, the system comprises: air intake duct
Road, heat exchanger, the first nitrogen-rich device and silo；
The pipeline that the air intake pipe is connect with the first nitrogen-rich device inlet end passes through in the heat exchanger
Portion；
The outlet side of the first nitrogen-rich device is connect with the silo；
The infiltration gas outlet pipe of the first nitrogen-rich device passes through inside the heat exchanger.
Optionally, the first nitrogen-rich device outlet side is also connect with the inlet end of the second nitrogen-rich device；
The outlet side of the second nitrogen-rich device is connected to the pipe that the first nitrogen-rich device is connect with the silo
On road.
Optionally, the inlet end of the second nitrogen-rich device is additionally attached to the first nitrogen-rich device and the air
On the pipeline of admission line.
Optionally, the infiltration gas outlet pipe connection of the second nitrogen-rich device is connect with the air intake pipe.
Optionally, the is equipped between the inlet end of the second nitrogen-rich device and the first nitrogen-rich device outlet side
One valve；
The tie point of first gate valve and the first nitrogen-rich device, towards the pipeline of the second nitrogen-rich device
On be additionally provided with the second valve；
Third valve is additionally provided between second valve and the tie point of the second nitrogen-rich device；
The 4th valve is additionally provided on the pipeline that the third valve is connect with the silo.
Optionally, the outlet pipe of the 4th valve is connected by the air inlet of the heat exchanger and nitrogen buffer tank；
The gas outlet of the nitrogen buffer tank is connect with the silo.
Optionally, heater is additionally provided between the heat exchanger and the first nitrogen-rich device；
The heater is connect by the 5th valve, the 6th valve with the inlet end of the second nitrogen-rich device；
The outlet side of first valve is connected between the 5th valve and the 6th valve.
Optionally, the 7th valve is additionally provided on the pipeline that the 5th valve is connect with the first nitrogen-rich device.
Optionally, the nitrogen buffer tank is additionally provided with pressure maintaining valve；
The gas outlet of the pressure maintaining valve is connect with the air intake pipe.
Optionally, it is additionally provided between the air intake pipe and the heat exchanger: compressor, radiator, freeze dryer, mistake
Filter；
The air intake pipe, the compressor, the radiator, the freeze dryer and the filter, successively connect
It connects；And the outlet side of the filter is connect with the inlet end of the first nitrogen-rich device.
The utility model has the advantage that compared with prior art
In the air delivery to the first nitrogen-rich device entered using the utility model embodiment, air intake pipe, the
One nitrogen-rich device carries out the enrichment of nitrogen to the nitrogen in air, and the higher nitrogen of the purity isolated is delivered to silo；
The lower infiltration gas of purity is delivered in heat exchanger.Since the temperature of the lower infiltration gas of purity is higher than the temperature of air, purity
Lower infiltration gas distributes heat in heat exchanger, and then, heat exchanger is entered with these heat air intake pipes
Air in first nitrogen-rich device, so as to avoid or reduce admission line entered in the first nitrogen-rich device
The heat consumed when air is heated, to save energy consumption.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of low energy consumption nitrogen grain storage system provided by the embodiment of the utility model.
Specific embodiment
It elaborates below to the embodiments of the present invention, the present embodiment before being with technical solutions of the utility model
It puts and is implemented, the detailed implementation method and specific operation process are given, but the protection scope of the utility model is unlimited
In following embodiments.
Fig. 1 is a kind of structural schematic diagram of low energy consumption nitrogen grain storage system provided by the embodiment of the utility model, such as Fig. 1 institute
Show, the system comprises: air intake pipe 11, heat exchanger 12, the first nitrogen-rich device 13 and silo 14；
The pipeline that the air intake pipe 11 is connect with 13 inlet end of the first nitrogen-rich device passes through the heat exchange
Inside device 12；
The outlet side of the first nitrogen-rich device 13 is connect with the silo 14；
The infiltration gas outlet pipe of the first nitrogen-rich device 13 passes through inside the heat exchanger 12.
Specifically, in the air delivery to the first nitrogen-rich device 13 that air intake pipe 11 enters, the first nitrogen-rich
Device 13 carries out the enrichment of nitrogen to the nitrogen in air, and the higher nitrogen of the purity isolated is delivered to silo 14；Purity compared with
Low infiltration gas is delivered in heat exchanger 12.Since the temperature of the lower infiltration gas of purity is higher than the temperature of air, purity is lower
Infiltration gas distribute heat in heat exchanger 12, then, heat exchanger 12 with these heat air intake pipes 11 enter
To the air in the first nitrogen-rich device 13, so as to avoid or reduce the first nitrogen-rich device entered to admission line
The heat that air in 13 consumes when being heated, to save energy consumption.
In practical applications, the pipeline that the air intake pipe 11 is connect with 13 inlet end of the first nitrogen-rich device
It is also connected with thermometer, thermometer T in corresponding diagram；Barometer, the first barometer P1 in corresponding diagram 1；The infiltration gas escape pipe
The exhaust outlet in road is communicated with the atmosphere；In addition, silo 14 is additionally provided with barometer for monitoring the air pressure in silo 14；Silo 14 also according to
It is secondary to be connected with air blower 30 and gas purity meter, the gas for being discharged in silo 14 and the gas for monitoring the discharge of silo 14
Purity: when to 14 inflated with nitrogen of silo or ventilation, air blower 30 is opened, and the gas in silo 14 is extracted out, and monitors extraction
The oxygen content of gas, to judge the start and stop of Nitrogen filling system.It should be noted that in second gas purity monitor corresponding diagram 1
Gas purity meter Pu2；Barometer P2 in second barometer corresponding diagram 1.
First nitrogen-rich device can be tunica fibrosa nitrogen separation device.
In a kind of specific embodiment of the utility model embodiment, 13 outlet side of the first nitrogen-rich device also with
The inlet end of second nitrogen-rich device 15 connects；
The outlet side of the second nitrogen-rich device 15 is connected to the first nitrogen-rich device 13 and connects with the silo 14
On the pipeline connect.
Specifically, air delivery to the second nitrogen-rich device 15 after the enrichment of the first nitrogen-rich device 13 carries out richness again
Collection.
Under normal conditions, the nitrogen gas purity after the enrichment of the outlet side output of the first nitrogen-rich device 13 is 95%, then
95% nitrogen is delivered in the second nitrogen-rich device 15, the nitrogen that purity is 99% is isolated, is then by purity again
99% nitrogen is conveyed toward silo 14.Using the utility model above-described embodiment, the available higher nitrogen of purity；Further
The oxygen content in silo 14 is reduced, to realize desinsection, ovicidal to greatest extent.
In addition, when detecting that oxygen content is more than setting value in silo 14, then system is opened in normal storage process,
To the nitrogen for being filled with 99% in storehouse；It can guarantee that the nitrogen gas purity in silo 14 is always held at higher (at least above 95%)
It is horizontal.
It requires emphasis yes, is needed when carrying out the first nitrogen-rich device 13 and the second nitrogen-rich device 15 is connected
Valve is set in each connecting pipe of first nitrogen-rich device 13 and the second nitrogen-rich device 15.Second nitrogen-rich device 15
It can be tunica fibrosa nitrogen separation device.
In a kind of specific embodiment of the utility model embodiment, the inlet end of the second nitrogen-rich device 15 is also
It is connected on the pipeline of the first nitrogen-rich device 13 and the air intake pipe 11.
Specifically, can be by the mutual cooperation between valve by the first nitrogen-rich device 13 and the second nitrogen-rich device 15
It is operated in parallel, quickly to produce nitrogen, and then quickly reduces storehouse energy oxygen content, kill most pests, fastly
Speed reduces the respiration of seed, to improve evaluation of storage quality of grain.
In a kind of specific embodiment of the utility model embodiment, the infiltration gas of the second nitrogen-rich device 15 goes out
Feed channel connection is connect with the air intake pipe 11.
It is more wasteful if being discharged into atmosphere since the nitrogen gas purity in the infiltration gas of the second nitrogen-rich device 15 is higher, because
This, the infiltration gas of the second nitrogen-rich device 15 can be delivered in air intake pipe 11, while saving nitrogen, may be used also
The concentration of the nitrogen in gas to improve the conveying of air intake pipe 11.
In a kind of specific embodiment of the utility model embodiment, the inlet end of the second nitrogen-rich device 15 with
The first valve 101 is equipped between first nitrogen-rich device, 13 outlet side；
The tie point of first gate valve 101 and the first nitrogen-rich device 13, leads to the second nitrogen-rich device
The second valve 102 is additionally provided on 15 pipeline；
Third valve 103 is additionally provided between second valve 102 and the tie point of the second nitrogen-rich device 15；
The 4th valve 104 is additionally provided on the pipeline that the third valve 103 is connect with the silo 14.
Specifically, the cooperation of the first valve 101, the second valve 102, third valve 103, the 4th valve 104 can be passed through
First nitrogen-rich device 13 and the second nitrogen-rich device 15 are subjected to operation in series or in parallel.
In a kind of specific embodiment of the utility model embodiment, the outlet pipe of the 4th valve 104 passes through
The heat exchanger 12 is connect with the air inlet of nitrogen buffer tank 18；
The gas outlet of the nitrogen buffer tank 18 is connect with the silo 14.
Since the temperature of the higher nitrogen of purity obtained after separation is higher, the conveyance conduit of the part nitrogen can be passed through
The heat exchange of heat exchanger 12 is crossed, using the air in these heat air intake pipes 11, further saves energy.
In addition, nitrogen buffer tank 18, after storing the first nitrogen-rich device 13 and the enrichment of the second nitrogen-rich device 15
Nitrogen, can be when the nitrogen in silo 14 be less, supplement nitrogen, the nitrogen meet demand in silo 14, but the first nitrogen
Gas enricher 13 and the second nitrogen-rich device 15 when endlessly producing nitrogen, store nitrogen, avoid the waste of nitrogen again,
It can also avoid the damage of the first nitrogen-rich device 13 and 15 intermittent work of the second nitrogen-rich device to equipment.
In a kind of specific embodiment of the utility model embodiment, the heat exchanger 12 and first nitrogen-rich
Heater 20 is additionally provided between device 13；
The heater 20 passes through the 5th valve 105, the inlet end of the 6th valve 106 and the second nitrogen-rich device 15
Connection；
The outlet side of first valve 101 is connected between the 5th valve 105 and the 6th valve 106.
In the case where the air underheat that heat exchanger 12 conveys air intake pipe 11, in order to improve the temperature of air
Degree is additionally provided with heater 20 between heat exchanger 12 and the first nitrogen-rich device 13, and the air after heater 20 heats can
To be entered in the second nitrogen-rich device 15 by the 5th valve 105, the 6th valve 106.
In a kind of specific embodiment of the utility model embodiment, the 5th valve 105 and first nitrogen
The 7th valve 107 is additionally provided on the pipeline that enricher 13 connects.
Using the utility model above-described embodiment, the air after heater 20 heats can be entered by the 7th valve 107
Into the first nitrogen-rich device 13.
In a kind of specific embodiment of the utility model embodiment, the nitrogen buffer tank 18 is additionally provided with pressure maintaining valve
1010；
The gas outlet of the pressure maintaining valve 1010 is connect with the air intake pipe 11.
In order to avoid the excessively high caused nitrogen buffer tank 18 of nitrogen pressure damages in nitrogen buffer tank 18, when third air pressure
It counts, when the barometer P3 in corresponding diagram 1 detects the hypertonia in nitrogen buffer tank 18, pressure maintaining valve 1010 is connected to, by nitrogen
Extra nitrogen is discharged into air intake pipe 11 in surge tank 18, and then can protect nitrogen buffer tank 18, can also be saved
Nitrogen resource reduces the carrying cost of grain.
In a kind of specific embodiment of the utility model embodiment, the air intake pipe 11 and the heat exchanger
It is additionally provided between 12: compressor 22, radiator 24, freeze dryer 26, filter 28；
The air intake pipe 11, the compressor 22, the radiator 24, the freeze dryer 26 and the filter
28, it is sequentially connected；And the outlet side of the filter 28 is connect with the inlet end of the first nitrogen-rich device 13.
Specifically, the air that air intake pipe 11 conveys is after the compression of compressor 22, gas temperature is increased, and passes through heat dissipation
Device 24, temperature is down to room temperature, cools down using freeze dryer 26 and removes water, and then crosses remaining mist in air filtering by tertiary filter 28
Shape water droplet and solid tiny particle, last gas enter heat exchanger 12, heat exchange are carried out with the tail gas of rich nitrogen module, after heating
The heated device 20 of gas is heated to set temperature.Barometer P1 and by the first barometer, in corresponding diagram 1；And temperature sensing
Device, thermometer T carries out timely monitor in corresponding diagram.Gas after water content, solid content, temperature, pressure are all up to standard, into
Enter the first nitrogen-rich device 13 and/or the second nitrogen-rich device 15.
Using the utility model embodiment, the purity of nitrogen can be further improved, can also avoid the particle in air
Damage of the object moisture to the first nitrogen-rich device 13 and/or the second nitrogen-rich device 15.
In addition, applying the utility model above-described embodiment:
1, when system just brings into operation, the second valve 102, third valve 103, the 5th valve 105, the 6th valve 106,
7th valve 107 is opened, and the first valve 101 is closed, and the 8th valve 108 is closed, and quality process controller valve is also switched off.At this moment
Two modules of rich nitrogen are parallel connection, open the 4th valve 104, the gas purity meter through the first purity monitor, in corresponding diagram 1
The nitrogen that purity reaches 95% after Pu1 monitoring exchanges heat by heat exchanger 12, into nitrogen buffer tank 18.First nitrogen-rich device 13
Infiltration gas be 30% or more air of oxygen content be discharged into atmosphere after heat exchange.The gas pressure in nitrogen buffer tank 18
When reaching preset threshold, inflated into silo 14.
2, after system runs a period of time, the oxygen content of gas is reduced to 5% hereinafter, carrying out valve at this time in silo 14
Handover operation: the 7th valve 107, the first valve 101, the 6th valve 106, third valve 103 are opened, and the second valve 102 is closed,
5th valve 105 is closed, and the 8th valve 108 is closed, and 32 valve of mass flow controller reaches setting position, at this time the first nitrogen
Enricher 13 and the second nitrogen-rich device 15 are series connection, and system pressure, flow all remain unchanged, and compressed air passes through the first nitrogen
Enricher 13, the nitrogen gas concn after enrichment reach 95%, then the nitrogen of 95% purity enter the second nitrogen-rich device 15, first
The infiltration gas that nitrogen-rich device 13 is discharged is 30% oxygen rich gas, and atmosphere is directly arranged after heat exchange.95% nitrogen is by the
Nitrogen gas purity reaches 99% after the purification of two nitrogen enrichers 15, after the first purity monitor Pu1 monitoring is qualified, through heat exchanger
12, into nitrogen buffer tank 18.
In addition, infiltration gas, i.e., nitrogen content is still relatively high in infiltration residual air, this portion gas no longer empties, by quality
It after flowmeter adjusts control, mixes with air, is improved in raw air in the air intake pipe 11 before returning to compressor 22
Nitrogen content.
3, it during normal grain storage, is set when the second purity monitor Pu2 monitors that the nitrogen gas purity in silo 14 is lower than
When definite value, compressor 22 is opened, and the valve transfer operation in valve step 2 is configured, and system is filled with 99% into silo 14
Nitrogen, nitrogen gas purity in silo 14 can be improved.
4, before opening a position, need first to be increased to oxygen content in storehouse the oxygen content of atmosphere, the personnel that then store in a warehouse just can be into
Enter and nearby handles dependencies.The infiltration gas of first nitrogen-rich device 13 can be collected, benefit is piped to silo
In 14, since oxygen content is relatively high in infiltration gas, the oxygen content in silo 14 can be improved rapidly, to reduce preparation
Time, thus improve silo 14 turnover efficiency.Its process are as follows: close the 8th valve 108, the tenth valve 1014, the 6th valve
Door 106；Open the 9th valve 1012；Booting makes system work, it can for quick oxygenating in silo 14.
Furthermore it is also possible to realize that level-one membrane separator and second level membrane separator are in parallel, by the first nitrogen by valve transfer
The infiltration gas of enricher 13 and/or the second nitrogen-rich device 15 collects, and oxygen-enriched infiltration gas is filled with silo 14, thus
The fast lifting for realizing 14 oxygen content of silo, further increases scavenging efficiency.
In a kind of specific embodiment of the utility model embodiment, system is additionally provided with PLC (Programmable
Logic Controller, programmable logic controller (PLC)) carry out system automatic control.
In a kind of specific embodiment of the utility model embodiment, which can be at any time using nitrogen processed at any time, nothing
Large-scale surge tank need to be put into, can also be realized vehicle-mounted integrated.To realize a set of onboard system, to the multiple silos in grain depot reservoir area 14
Nitrogen charging, the covering for mending nitrogen.
In addition, in practical applications, inlet filter 34 is also connected on gas inlet pipeline 11, for carrying out to air
Primary filtration.It is understood that the outlet side of gas inlet pipeline 11 is connect with the inlet end of inlet filter 34, enter to make a slip of the tongue
The outlet side of filter 34 can with the inlet end of compressor 22, the outlet side of mass flowmenter 32, pressure maintaining valve 1010 gas outlet
Connection.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Made any modifications, equivalent replacements, and improvements etc., should be included in the utility model within the spirit and principle of utility model
Protection scope within.
Claims (10)
1. a kind of low energy consumption nitrogen filling grain storage system, which is characterized in that the system comprises: air intake pipe, heat exchanger, first
Nitrogen-rich device and silo；
The pipeline that the air intake pipe is connect with the first nitrogen-rich device inlet end passes through inside the heat exchanger；
The outlet side of the first nitrogen-rich device is connect with the silo；
The infiltration gas outlet pipe of the first nitrogen-rich device passes through inside the heat exchanger.
2. a kind of low energy consumption nitrogen filling grain storage system according to claim 1, which is characterized in that the first nitrogen-rich device
Outlet side is also connect with the inlet end of the second nitrogen-rich device；
The outlet side of the second nitrogen-rich device is connected on the pipeline that the first nitrogen-rich device is connect with the silo.
3. a kind of low energy consumption nitrogen filling grain storage system according to claim 2, which is characterized in that the second nitrogen-rich device
Inlet end be additionally attached on the pipeline of the first nitrogen-rich device and the air intake pipe.
4. a kind of low energy consumption nitrogen filling grain storage system according to claim 2, which is characterized in that the second nitrogen-rich device
Infiltration gas outlet pipe connection connect with the air intake pipe.
5. a kind of low energy consumption nitrogen filling grain storage system according to claim 2, which is characterized in that the second nitrogen-rich device
Inlet end and the first nitrogen-rich device outlet side between be equipped with the first valve；
The tie point of first valve and the first nitrogen-rich device, towards the pipeline of the second nitrogen-rich device on also
Equipped with the second valve；
Third valve is additionally provided between second valve and the tie point of the second nitrogen-rich device；
The 4th valve is additionally provided on the pipeline that the third valve is connect with the silo.
6. a kind of low energy consumption nitrogen filling grain storage system according to claim 5, which is characterized in that the outlet of the 4th valve
Pipeline is connected by the air inlet of the heat exchanger and nitrogen buffer tank；
The gas outlet of the nitrogen buffer tank is connect with the silo.
7. a kind of low energy consumption nitrogen filling grain storage system according to claim 6, which is characterized in that the heat exchanger and described the
Heater is additionally provided between one nitrogen-rich device；
The heater is connect by the 5th valve, the 6th valve with the inlet end of the second nitrogen-rich device；
The outlet side of first valve is connected between the 5th valve and the 6th valve.
8. a kind of low energy consumption nitrogen filling grain storage system according to claim 7, which is characterized in that the 5th valve with it is described
The 7th valve is additionally provided on the pipeline of first nitrogen-rich device connection.
9. a kind of low energy consumption nitrogen filling grain storage system according to claim 6, which is characterized in that the nitrogen buffer tank is also set
There is pressure maintaining valve；
The gas outlet of the pressure maintaining valve is connect with the air intake pipe.
10. a kind of low energy consumption nitrogen filling grain storage system according to claim 1, which is characterized in that the air intake pipe
It is additionally provided between the heat exchanger: compressor, radiator, freeze dryer, filter；
The air intake pipe, the compressor, the radiator, the freeze dryer and the filter, are sequentially connected；And
The outlet side of the filter is connect with the inlet end of the first nitrogen-rich device.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821037194.2U CN208597358U (en) | 2018-07-02 | 2018-07-02 | A kind of low energy consumption nitrogen filling grain storage system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821037194.2U CN208597358U (en) | 2018-07-02 | 2018-07-02 | A kind of low energy consumption nitrogen filling grain storage system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108575343A (en) * | 2018-07-02 | 2018-09-28 | 合肥工业大学智能制造技术研究院 | A kind of low energy consumption nitrogen filling grain storage system |
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2018
- 2018-07-02 CN CN201821037194.2U patent/CN208597358U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108575343A (en) * | 2018-07-02 | 2018-09-28 | 合肥工业大学智能制造技术研究院 | A kind of low energy consumption nitrogen filling grain storage system |
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