CN108669228A - Nitrogen air-conditioning storing grain method - Google Patents
Nitrogen air-conditioning storing grain method Download PDFInfo
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- CN108669228A CN108669228A CN201810390094.6A CN201810390094A CN108669228A CN 108669228 A CN108669228 A CN 108669228A CN 201810390094 A CN201810390094 A CN 201810390094A CN 108669228 A CN108669228 A CN 108669228A
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- grain
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23B—PRESERVING, e.g. BY CANNING, MEAT, FISH, EGGS, FRUIT, VEGETABLES, EDIBLE SEEDS; CHEMICAL RIPENING OF FRUIT OR VEGETABLES; THE PRESERVED, RIPENED, OR CANNED PRODUCTS
- A23B9/00—Preservation of edible seeds, e.g. cereals
- A23B9/16—Preserving with chemicals
- A23B9/18—Preserving with chemicals in the form of gases, e.g. fumigation; Compositions or apparatus therefor
- A23B9/20—Preserving with chemicals in the form of gases, e.g. fumigation; Compositions or apparatus therefor in a controlled atmosphere, e.g. partial vacuum, comprising only CO2, N2, O2 or H2O
Abstract
The invention discloses a kind of nitrogen air-conditioning storing grain methods, include the following steps：A. hole capital after selling all securities air-leakage test is carried out；B. conveying grain into storehouse after hole capital after selling all securities air-tightness is up to standard；C. real storehouse air-leakage test is carried out；D. nitrogen charging storage is carried out after real storehouse air-tightness is up to standard.Nitrogen air-conditioning storing grain method with above-mentioned steps substitutes carbon dioxide using nitrogen and carries out air-conditioning storing grain as gas medium, greatly reduces the operating cost of air-conditioning storing grain.And Nitrogen source gases abundance can be directly isolated to obtain in air so that this method is not limited by air source, is suitble to large-scale promotion.
Description
Technical field
The present invention relates to a kind of methods carrying out storage keeping grain using nitrogen.
Background technology
Grain is the strategic important goods concerning national economy, social stability, is asked to solve having a meal for 1,300,000,000 populations
Topic, keep certain storage level to ensure grain supply and demand it is in a basic balance, deal with all kinds of accidents and be of great significance.I
Because of kind difference, Storage Period of Time is generally 1~5 year state's foodstuff preservation, and grain is organism living, vulnerable in storage
Worm corrodes, and also with the extension of storage time because of storage condition difference different degrees of decline occurs for quality.Grain storage pest at present
The major measure of prevention is using Chemical treatments such as phosphine fumigations.Use chemical agent, on the one hand, grain storage pest meeting
Developing immunity to drugs causes difficulty of prevention and cure to incrementally increase；On the other hand, the fumigant such as hydrogen phosphide to the health of user of service,
Medicament production has environment more or less influence.The major measure of delay grain storage quality variation at present is control storage
Temperature is hidden, reaches low temperature or machine aeration, but regional in south China, for the grain of large low price, realizes low temperature or standard
Cryopreservation, it is of high cost.
The present invention is exactly green Storing in quality guaranteed of the storage link in industrial chain using nitrogen controlled atmosphere realization grain.Controlled atmosphere
Grain storage technology is to realize insect prevention, desinsection, antibacterial and delay grain by changing the gas composition in the good silo of airtight performance
Eat the purpose of quality comparison.
Air-conditioning storing grain is the external green grain storage technology more generally used：The 1970s, air-conditioning storing grain was each in the world
There is a larger progress on ground, the Bailey.S.W of United States Department of Agriculture, Oxley., T.A Storye.L, Italian
J.Sheibal, the scholars such as Australian Banks.H.T have made numerous studies in this respect, and in succession big in Italy, Australia
The states such as Leah, Israel, Canada, Singapore held international controlled atmosphere and stifling academic conference, to promote world's model
Enclose the development of air-conditioning storing grain technology.
Invention content
In view of this, the present invention provides a kind of nitrogen air-conditioning storing grain method, substituted using the cheaper nitrogen of cost
CO2Carry out air-conditioning storing grain.
In order to solve the above technical problems, the technical scheme is that：A kind of nitrogen air-conditioning storing grain method, including it is following
Step：
A. hole capital after selling all securities air-leakage test is carried out；
B. conveying grain into storehouse after hole capital after selling all securities air-tightness is up to standard；
C. real storehouse air-leakage test is carried out；
D. nitrogen charging storage is carried out after real storehouse air-tightness is up to standard.
As an improvement air-leakage test requirement is as follows in step A and step C：
(1) one-storey house hole capital after selling all securities air-tightness 300Pa is down to the half-life period of 150pa not less than 120s；
(2) controlled atmosphere under horizontal warehouse film, the half-life period that real storehouse air-tightness -300Pa rises to -150pa are not less than 300s；
(3) the whole storehouse controlled atmosphere of silo, the half-life period that real storehouse air-tightness 500Pa is down to 250pa are not less than 240s.
(4) the grain film for sealing door and grain face is less than 56mL/ (m using OTR oxygen transmission rate2.24h), tensile strength is more than
120(kg/mm2) plastic film.
As an improvement carrying out warehouse air-tightness transformation if hole capital after selling all securities air-leakage test is unqualified；Horizontal warehouse handles storehouse
Room heap grain line part below, including grain face, door, wall, technique hole, technique hole include into (going out) air port, lead to naturally
Air port, axial flow blower mouth, detection pipe and wall surface junction, the junction of air inlet and metope, the recessive hole that all kinds of pipelines leave
Hole such as hydrogen phosphide detection pipe, cable for measuring temperature inlet wire pipe, light conduits pipe；Shallow garden storehouse processing grain-guard door, grain outlet, grain inlet, into
Manhole, silo roof ventilation hole, orlop ventilation opening.
As a preferred embodiment, nitrogen charging is using fixed gas station or mobile nitrogen making machine in step D；It adopts at fixed gas station
With pressure-variable adsorption nitrogen oxygen separating process；Mobile nitrogen making machine mainly uses membrane nitrogen oxygen separating process；Varying-voltage adsorption nitrogen machine
It is 99.5% to export nitrogen design concentration, concentration adjustable range 98%~99.5%；It is dense that membrane separation nitrogen making machine exports nitrogen design
Degree is 99%, concentration adjustable range 95%~99%.For 50,000 ton-grain library of scale configuration gas production 200m3~250m3Nitrogen processed
Machine；For 100,000 ton-grain library of scale configuration gas production 310m3~350m3Nitrogen making machine.
As an improvement horizontal warehouse is inflated from grain heap top in step D, when grain face film is heaved, from ground cage air duct
Mouth exhaust；Silo is inflated into storehouse simultaneously from two ventilation openings of orlop, while from silo roof vent.Continuous charge, if
When exhaust concentration is less than aimed concn 3%~5%, stop inflating, unlatching circulation fan, concentration in uniform grain heap works as inspection
When measuring point concentration difference≤2%, stop circulation.It according to concentration levels in storehouse, repeats the above process, grain heap nitrogen gas concn is made to reach
Aimed concn.
As a preferred embodiment, in step D when controlled atmosphere desinsection, nitrogen gas concn >=98% in grain heap, time >=28 day are maintained；
For substantially without worm grain, when upper layer is averaged grain temperature is more than 20 DEG C when start to inflate insect prevention, maintain nitrogen gas concn in grain heap >=
95%, when nitrogen gas concn is less than aimed concn, timely tonifying Qi improves concentration；For no worm grain, when the upper layer grain temperature that is averaged is more than 25
DEG C when start storage in controlled atmosphere, maintain nitrogen gas concn 90%~95% in grain heap, when nitrogen gas concn is less than aimed concn, mend in time
Air lift high concentration；The grain higher to the local moisture newly to put in storage, the reinflated carry out controlled atmosphere after water balance, grain feelings are stablized
Storage.
As an improvement when inflation and tonifying Qi, nitrogen gas concn in the grain heap of detection in every 4 hours；The ca cold storage phase
Between, nitrogen gas concn in the grain heap of detection in every 2 days.
The invention has the beneficial effects that：Nitrogen air-conditioning storing grain method with above-mentioned steps substitutes dioxy using nitrogen
Change carbon and carry out air-conditioning storing grain as gas medium, greatly reduces the operating cost of air-conditioning storing grain.And Nitrogen source gases abundance can
It is directly isolated to obtain in air so that this method is not limited by air source, is suitble to large-scale promotion.
Description of the drawings
Fig. 1 is the flow chart of the present invention.
Specific implementation mode
In order to make those skilled in the art more fully understand technical scheme of the present invention, with reference to specific embodiment party
The present invention is described in further detail for formula.
In the present invention nitrogen produce including：Fixed gas station owner will use pressure-variable adsorption nitrogen oxygen separating process；It is mobile
Nitrogen making machine mainly uses membrane nitrogen oxygen separating process.
For 50,000 ton-grain library of scale, according to the difference of Grain Reserve Ecology condition and management platform, configuration gas production 100m3~
250m3Nitrogen making machine；Gas production is configured according to the difference of Grain Reserve Ecology condition and management platform for 100,000 ton-grain library of scale
265m3~350m3Nitrogen making machine.It is 99.5% that varying-voltage adsorption nitrogen machine, which exports nitrogen design concentration, concentration adjustable range 98%
~99.5%；It is 99% that membrane separation nitrogen making machine, which exports nitrogen design concentration, concentration adjustable range 95%~99%.
According to the reasonable disposition of the technological parameters such as the type design nitrogen making machine gas production of air compressor machine, structure size, reduce empty
Press adds discharge time, reduces energy consumption.Cancel the exhaust gas evacuation technique of the equipment of making nitrogen.Oxygen in gas is parsed by detection
Content, control cleaning tolerance.
Nitrogen produces key components and parts：
(1) tower structure is adsorbed：Dedicated nitrogen-making equipment merges both APCI and BF using the structure design of " Wide " mode
Technical advantage；Anti-shock baffle is arranged using micropore jet " unrestrained diffusion " mode in gas distribution mode in adsorption tower, prevents
Direct impact of the high-voltage high-speed airflow to adsorbent of molecular sieve.
(2) adsorbent：The adsorbent of making nitrogen by pressure swing adsorption need to select import original product, it is ensured that molecular sieve density in accordance with
Production engineering specifications：Micropore is flourishing, and adsorption specific surface area is big, high mechanical strength.
(3) gas source purification：Cleaning equipment treatment effect reaches moisture≤1.16g/m3, oil vapour content≤
0.01ppm。
The step of nitrogen air-conditioning storing grain includes：
The first step, air-leakage test.It is intended to carry out air-leakage test before and after grain binning.
Hole capital after selling all securities and real storehouse air-leakage test require as follows：
(1) one-storey house hole capital after selling all securities air-tightness 300Pa is down to the half-life period of 150pa not less than 120s.
(2) controlled atmosphere under horizontal warehouse film, the half-life period that real storehouse air-tightness -300Pa rises to -150pa are not less than 300s.
(3) storehouses shallow garden Cang Zheng controlled atmosphere, the half-life period that real storehouse air-tightness 500Pa is down to 250pa are not less than 240s.
(4) the grain film for sealing door and grain face is less than 56mL/ (m using OTR oxygen transmission rate2.24h), tensile strength is more than
120(kg/mm2) plastic film.
Warehouse air-tightness transformation is carried out if hole capital after selling all securities air-leakage test is unqualified；Horizontal warehouse handles warehouse heap grain line or less
Part, including grain face, door, wall, technique hole, technique hole include into (going out) air port, natural ventilation port, axis stream wind
Machine mouth, detection pipe and wall surface junction, the junction of air inlet and metope, the recessive hole such as hydrogen phosphide that all kinds of pipelines leave
Detection pipe, cable for measuring temperature inlet wire pipe, light conduits pipe；Shallow garden storehouse processing grain-guard door, grain outlet, grain inlet, into manhole, silo roof
Ventilation hole, orlop ventilation opening.
Specific air-tightness modification measures are as follows：
(1) horizontal warehouse
1. wall
Diaphragm seal：Wall biofilm, biofilm can before grain export real storehouse biofilm, also can hole capital after selling all securities biofilm.
Brush airtight coating：On the basis of gap uses mortar cement seal, the airtight painting of brushing Polyamide Epoxy
Material.
At corner, ground and wall connecting：Cream ash is mixed and stirred with acrylic coating and fills crack, after cream ash dry solidification, is used
Acrylic coating coats 3~4 times.
2. door
One brick wall seals：Stable to grain feelings, long-term storage grain, builds one brick wall, wall plastering improves gas in door
Close property.
Diaphragm seal：At doorframe 10cm, plastic-steel double flute pipe is installed, is pressed into diaphragm seal, plastic film and door when inflation
It is affixed.
Gas-tight door is transformed：The pressing device of airtight door and window is transformed, gap is sealed with glass cement between doorframe and metope, door
Between fan and with high-quality " d " the type rubber seal of tube in doorframe junction.
3. technique hole
Force ventilation mouth：Gasket among cover board and force ventilation mouth is changed to " d " rubber tube, seam crossing sealing
Glue filleting.
Axial flow blower mouth：Wind turbine mouth surrounding installs barrel, uses diaphragm seal.
Pvc pipe through walls：Compacting spout part position is filled up with merogenesis silk thread is added after coating and filler mixing, after floating, is brushed
Coating 2 times.
Thermometric line cable connector position：Surrounding brushing paint 2 times wrapped up in flexible putty it is flat, wrap after wind silk thread again,
Then it uses the mixture of coating and putty to smooth out, pastes grid cloth above, then in external coating coating.
4. terrace
To ground gap using polyurethane and the dry sand spice cementation of fissures, polyurethane processing is then filled again.
5. single side is closed
Closed using film single side if air leak position is mainly the silo of silo roof, the position of processing includes：Door, technique
Hole, terrace, the airtight coating of wall brush (alternative).After conveying grain into storehouse, smooth grain face arranges that temp measuring system and nitrogen are dense
Detection pipe is spent, then seals grain face with plastic film, with press strip by the whole THIN COMPOSITE of ready-made 2m~4m bigger than warehouse size
Membrane pressure enters grain face sealing barrel.
6. five-surfac airtight
Air leak position is mainly the silo of door, wall, in conjunction with Grain Inventory Updating By Turns, is sealed using five faces, the position of processing includes：
Door, technique hole, terrace.The closed same single side of grain face is closed, and common grain film can be used in wall biofilm, to reduce labor intensity, most
Well using real storehouse biofilm, specific method is：Before grain export, the film that will first hang is by grain face bilayer barrel to ground identity distance
From size cut (length can be more slightly longer), and the film cut is folded into elongate strip alongside on wall side；By film
One end is fitly pressed into barrel with press strip, and adjacent two pieces of films are overlapped 10cm~20cm；Allow grain during grain outbound
Film hangs naturally with export progress, evens up arrangement again after grain all goes out sky；New grain is into after expiring, first by the press strip in barrel
It removes, then the film for being higher by grain face is folded by wall or cut off, meanwhile, the closed laminated film of grain face is neatly embedding with press strip
Enter in barrel, forms grain heap five-surfac airtight.
(2) silo
1. adding film gas-tight door between grain-guard door and closed heat insulation door.
The close ram seal element of implication 2. inspection is put out cereal, replaces unqualified element, and periphery fills silicone adhesive, holds out against compression
Device.
3. checking grain inlet and into manhole, aging or damaged air-tight rubber strip are replaced, sticks on soft rubber cushion, tightens housing screw.
4. checking silo roof ventilation hole, aging or damaged air-tight rubber strip are replaced, and add and apply sealing compound.
5. orlop ventilation opening replaces air-tight rubber strip, air leak position applies neutral silicone adhesive mending-leakage.
Second step, conveying grain into storehouse after hole capital after selling all securities air-tightness is up to standard.Still the standard in the first step is used to be examined after putting in storage
It surveys, the detection requirement not up to standard being transformed by air-tightness in the first step is transformed, until up to standard.
Third walks, and carries out nitrogen charging storage.
1. the preparation before inflation
(1) operating personnel prepare
Implement responsible person：The basic theoretical knowledge for grasping nitrogen controlled atmosphere, can organize and instruct controlled atmosphere operation.
Operating personnel：It is familiar with air-tightness processing and security protection and detection device application method, energy skilled operation nitrogen is set
It is standby.
Security protection personnel：Put in storage operation when should arrange 1 or more be responsible for security protection personnel.
(2) air supply system is checked
Check the equipment of making nitrogen and its working environment.
Check whether backend flow (such as steam line, warehouse entry valve switch situation, warehouse are closed) is got ready.
Check whether the mobile equipment of making nitrogen places whether steady, live power supply meets electrical safety operating instruction.
Check that whether complete safety device (such as respirator) is, effective.
Closed warehouse, each door should lock and put up warning mark by the regulation of GB 2894.
Nitrogen controlled atmosphere is inflated opportunity and is required as follows：
For nitrogen desinsection, grain temperature when inflation is generally required at 20 DEG C or more, to reach satisfied insecticidal effect.
2. setting nitrogen aimed concn in grain heap
After real storehouse air-tightness reaches air-tightness related request, according to grain heap pest density (no worm grain, substantially without worm grain,
Worm grain), determine the outlet nitrogen gas concn of pressure-variable adsorption or membrane separation nitrogen making machine.
1. for no worm grain, start ca cold storage, the higher grain of local moisture, dimension when grain temperature reaches 25 DEG C when surface layer
Nitrogen gas concn 98% or so in grain heap are held, other maintain nitrogen gas concn 90%~95% in grain heap；2. for substantially without worm grain,
Start to inflate insect prevention when on surface layer, grain temperature reaches 20 DEG C, the higher paddy of local moisture maintains nitrogen gas concn 98% in grain heap left
The right side, other maintain 95% or more nitrogen gas concn in grain heap；3. for worm grain, when grain heap temperature reaches 15 DEG C or more, carry out in time
98% or more nitrogen gas concn maintains not less than 28 days desinsections to handle, if local moisture is higher, grain heap is continued to after desinsection
Interior nitrogen gas concn 98% or so, other can not tonifying Qi, maintain concentration Natural Attenuation.Nitrogen gas concn, temperature and pest death feelings
The relationship of condition is shown in Table 1~table 3.
1 pest death condition table (nitrogen gas concn 98%) of table
2 pest death condition table of table (nitrogen gas concn 90%, 95%)
Remarks：* there is larvae hatch to come out in * * worm's ovum snellen tests in worm's ovum snellen test to come out without larvae hatch
The lethal time of the lethal grain storage pest of the different nitrogen gas concns of table 3
Remarks：Temperature and humidity conditions in table are：25 ± 1 DEG C, 70% ± 5%R.H.
3. aerating position
Horizontal warehouse is filled with nitrogen from warehouse top, and air feed equipment gas outlet is connected with controlled atmosphere pipeline outside storehouse, and gas is from warehouse
Top enters grain heap, the nitrogen out of ventilation opening gap wind turbine forced exhaust displacement grain heap space.Silo is filled with nitrogen from orlop
Gas, air feed equipment gas outlet are connected with storehouse outer vent, and gas enters grain heap from warehouse lower part, are vented from silo roof exhaust outlet, etc.
The pressed nitrogen changed in grain heap space.
4. charge operation
1. opening the intake ＆ exhaust valves door of silo to be inflated, the air intake valve of non-aerating silo is closed.
2. opening the equipment of making nitrogen by operation instructions, nitrogen output flow is adjusted to target warehouse nitrogen charging.
3. film separation and nitrogen-making is inflated using various concentration stage by stage：The starting stage is inflated, it is 95% left to adjust exit concentration
Right inflation；When warehouse, exhaust concentration reaches 95%, exit concentration is adjusted to 98% or so；To controlled atmosphere desinsection, when warehouse is vented
When concentration reaches 97%, exit concentration is adjusted to 99% or so.
4. preventing film breaks during horizontal warehouse nitrogen charging or falling off.
5. after each graduated charge or after grain heap nitrogen reaches aimed concn, first stop the equipment of making nitrogen, turn off into
Gas and drain tap.
5. nitrogen gas concn circulation is balanced
After inflation reaches aimed concn, stop nitrogen making machine, starts warehouse circulation fan, grain heap space gases are in wind turbine
Drive under circulate, so that the gas in grain heap space is sufficiently mixed and reach basis equalization.When the nitrogen of 9 test points is dense
Degree it is poor≤2% when, end circulation.
6. real-time tonifying Qi
When grain heap nitrogen gas concn is required less than aimed concn, timely tonifying Qi is answered.
7. ca cold storage daily management
Nitrogen gas concn detects：
1. when inflation and tonifying Qi, according to different situations, nitrogen gas concn in the grain heap of detection in every 2 hours~8 hours.
2. during ca cold storage, nitrogen gas concn in the grain heap of detection in every 1 day~3 days.
It the above is only the preferred embodiment of the present invention, it is noted that above-mentioned preferred embodiment is not construed as pair
The limitation of the present invention, protection scope of the present invention should be subject to claim limited range.For the art
For those of ordinary skill, without departing from the spirit and scope of the present invention, several improvements and modifications can also be made, these
Improvements and modifications also should be regarded as protection scope of the present invention.
Claims (8)
1. a kind of nitrogen air-conditioning storing grain method, it is characterised in that include the following steps：
A. hole capital after selling all securities air-leakage test is carried out；
B. conveying grain into storehouse after hole capital after selling all securities air-tightness is up to standard；
C. real storehouse air-leakage test is carried out；
D. nitrogen charging storage is carried out after real storehouse air-tightness is up to standard.
2. a kind of nitrogen air-conditioning storing grain method according to claim 1, it is characterised in that air-tightness in step A and step C
Testing requirements are as follows：
(1) one-storey house hole capital after selling all securities air-tightness 300Pa is down to the half-life period of 150pa not less than 120s；
(2) controlled atmosphere under horizontal warehouse film, the half-life period that real storehouse air-tightness -300Pa rises to -150pa are not less than 300s；
(3) the whole storehouse controlled atmosphere of silo, the half-life period that real storehouse air-tightness 500Pa is down to 250pa are not less than 240s.
(4) the grain film for sealing door and grain face is less than 56mL/ (m using OTR oxygen transmission rate2.24h), tensile strength is more than 120 (kg/
mm2) plastic film.
3. a kind of nitrogen air-conditioning storing grain method according to claim 1, it is characterised in that：If hole capital after selling all securities air-leakage test does not conform to
Lattice then carry out warehouse air-tightness transformation；Horizontal warehouse handles warehouse heap grain line part below, including grain face, door, wall, technique
Hole, technique hole include into (going out) air port, natural ventilation port, axial flow blower mouth, detection pipe and wall surface junction, air inlet with
The junction of metope, the recessive hole that all kinds of pipelines leave such as hydrogen phosphide detection pipe, cable for measuring temperature inlet wire pipe, light conduits pipe；
Shallow garden storehouse processing grain-guard door, grain outlet, grain inlet, into manhole, silo roof ventilation hole, orlop ventilation opening.
4. a kind of nitrogen air-conditioning storing grain method according to claim 1, it is characterised in that nitrogen charging is using fixed in step D
Gas station or mobile nitrogen making machine；The fixed gas station equipment of making nitrogen uses pressure-variable adsorption nitrogen oxygen separating process；Mobile nitrogen making machine
Membrane nitrogen oxygen separating process can be used；It is 99.5% that varying-voltage adsorption nitrogen machine, which exports nitrogen design concentration, concentration adjustable range
98%~99.5%；It is 99% that membrane separation nitrogen making machine, which exports nitrogen design concentration, concentration adjustable range 95%~99%.For rule
50,000 ton-grain library of mould configures gas production 100m3~250m3Nitrogen making machine；For 100,000 ton-grain library of scale configuration gas production 265m3~
350m3Nitrogen making machine.
5. a kind of nitrogen air-conditioning storing grain method according to claim 4, it is characterised in that horizontal warehouse is from grain heap in step D
Portion is inflated, and when grain face film is heaved, is vented from ground cage wind passage mouth；Silo is filled into storehouse simultaneously from two ventilation openings of orlop
Gas, while from silo roof vent.Continuous charge stops filling if exhaust concentration is less than aimed concn 3%~5%
Gas opens circulation fan, concentration in uniform grain heap, when test point concentration difference≤2%, stops circulation.According to concentration feelings in storehouse
Condition repeats the above process, and grain heap nitrogen gas concn is made to reach aimed concn.
6. a kind of nitrogen air-conditioning storing grain method according to claim 5, it is characterised in that：Film separation and nitrogen-making is using stage by stage
Various concentration is inflated：The starting stage is inflated, it is 94~96% inflations to adjust exit concentration；When warehouse, exhaust concentration reaches 95%
When, exit concentration is adjusted to 97~98%；When exhaust concentration reaches 97% or so when warehouse, stop inflation.
7. a kind of nitrogen air-conditioning storing grain method according to claim 1, it is characterised in that in step D when controlled atmosphere desinsection, dimension
Nitrogen gas concn >=98% in grain heap, time >=28 day are held, or maintain nitrogen gas concn >=95% in grain heap, time >=90 day；It is right
In substantially without worm grain, when upper layer is averaged grain temperature is more than 20 DEG C when start to inflate insect prevention, maintain nitrogen gas concn >=95% in grain heap, nitrogen
When gas concentration is less than aimed concn, timely tonifying Qi improves concentration；For no worm grain, when upper layer is averaged grain temperature is more than 25 DEG C when start
Storage in controlled atmosphere maintains nitrogen gas concn 90%~95% in grain heap, and when nitrogen gas concn is less than aimed concn, timely tonifying Qi improves dense
Degree；The grain higher to the local moisture newly to put in storage, the reinflated carry out ca cold storage after water balance, grain feelings are stablized.
8. a kind of nitrogen air-conditioning storing grain method according to claim 1, it is characterised in that：When inflation and tonifying Qi, every 4 hours
Nitrogen gas concn in the grain heap of detection in~8 hours；During ca cold storage, nitrogen gas concn in the grain heap of detection in every 1 day~3 days.
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| CN109884948A (en) * | 2019-03-19 | 2019-06-14 | 辽宁省粮食科学研究所 | A kind of Multifunctional grain situation monitoring experiment system and its control method |
| CN111165576A (en) * | 2020-03-24 | 2020-05-19 | 四川省农业机械研究设计院 | Method for reducing loss after grain harvest |
| CN111758773A (en) * | 2020-07-17 | 2020-10-13 | 中国储备粮管理集团有限公司西安分公司 | Room type grain storage method |
| CN112931614A (en) * | 2021-03-29 | 2021-06-11 | 广东康帝绿色生物科技有限公司 | Storage building for camellia seeds and soybeans and nitrogen control mode of storage building |
| CN114246211A (en) * | 2021-12-30 | 2022-03-29 | 合肥弘恩机电科技有限公司 | Intelligent nitrogen gas-adjusting grain storage device and method |
| CN115251154A (en) * | 2022-09-01 | 2022-11-01 | 北京长顺安达测控技术有限公司 | Shallow round bin nitrogen gas adjusting method |
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| CN109884948A (en) * | 2019-03-19 | 2019-06-14 | 辽宁省粮食科学研究所 | A kind of Multifunctional grain situation monitoring experiment system and its control method |
| CN111165576A (en) * | 2020-03-24 | 2020-05-19 | 四川省农业机械研究设计院 | Method for reducing loss after grain harvest |
| CN111758773A (en) * | 2020-07-17 | 2020-10-13 | 中国储备粮管理集团有限公司西安分公司 | Room type grain storage method |
| CN112931614A (en) * | 2021-03-29 | 2021-06-11 | 广东康帝绿色生物科技有限公司 | Storage building for camellia seeds and soybeans and nitrogen control mode of storage building |
| CN114246211A (en) * | 2021-12-30 | 2022-03-29 | 合肥弘恩机电科技有限公司 | Intelligent nitrogen gas-adjusting grain storage device and method |
| CN115251154A (en) * | 2022-09-01 | 2022-11-01 | 北京长顺安达测控技术有限公司 | Shallow round bin nitrogen gas adjusting method |
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Application publication date: 20181019 |