CN1289536A - Technique and equipment for recirculating fumigation in house-type granary - Google Patents
Technique and equipment for recirculating fumigation in house-type granary Download PDFInfo
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- CN1289536A CN1289536A CN 99114467 CN99114467A CN1289536A CN 1289536 A CN1289536 A CN 1289536A CN 99114467 CN99114467 CN 99114467 CN 99114467 A CN99114467 A CN 99114467A CN 1289536 A CN1289536 A CN 1289536A
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Abstract
The technology and equipment for internal recirculating fumigating in house-type granary features that after the surface of grains stack is sealed, the hydrogen phosphide and CO2 gases are forced into grains stack by blower and internal reciculating gas distributor. After the gas moves from bottom to top slowly, it is sucked into the branch pipe of said gas distributor and then comes into distributor and blower to form cyclic flow. Its advantages include uniform distribution of gas, high insecticidal efficiency, less environmental pollution, less consumption of chemical and high safety.
Description
The present invention relates to a kind of foodstuff preservation technology, especially the interior re circulation fumigation and the equipment of room formula silo.
Present silo re circulation fumigation has three kinds:
1, " phosphine outside storehouse recirculation fumigation new technology outfit industrialization development research " literary composition of publishing directly under storehouse and Wuqing, Tianjin state-owned grain depot Combined Trials by two-story valley profit grain technological development Co., Ltd, State Bureau of Grain Reserve Tianjin, this article is the partial content of country's " eight or five " brainstorm project, at " grain storage pest and Prevention Technique " the 28th volume.This technology has been used generator outside the improved storehouse of Jinxiang, Shandong grain machine factory, the recirculation fumigation device, this device comprises stifling special fan and circulation pipeline, pipe fitting, pipe valve etc., circulating pipe route circulation master, bye-pass, inlet duct, the return air pipeline is formed in air quantity adjusting and the storehouse, this technology in State Bureau of Grain Reserve Tianjin directly under the 18-2 storehouse in storehouse, the 01-1 storehouse, the 02-1 storehouse is on probation, the grain face of implementing in the 01-1 storehouse is provided with in the airtight recirculation fumigation of " V " type backwind tube grain face single face (all the other backwind tubes that connect " V " type backwind tube all are located at outside the storehouse), stifling after 15 days, three angular region phosphine skewness in the storehouse, following floor height upper strata is low, thereafter carried out test for the second time again, three angular region grains are with having installed " ten " font return air pipeline additional in the storehouse, and effect was just more slightly improved.Outside circulation fumigation technology technology (be that muffler passes through the Outer Tube return-air from window, the grain face does not add sealing) is used in the 18-2 storehouse, because the pipeline poor air-tightness, air-loss is big, and keeping just needed tonifying Qi in two days.After last twice off-test, summing up experience is tested again in the 02-1 storehouse, will be at the pipeline utilization different-diameter stainless steel pipes in 18-2 storehouse, and airtight effect is strengthened, and the return air duct peripheral hardware has been obtained certain effect, but the test cabin height has only 4 meters.By this test as can be seen, fixed pipeline main body is based on the stainless steel thin-wall steel pipe, the one and stifling special machine together, disposable input price is relatively more expensive, the pipeline peripheral hardware is easily revealed simultaneously, causes environmental pollution, establishes the stainless steel tube part in the bottom pipe and causes grain heap dewfall easily.The 2nd, caused easily by the influence of environment " heating installation effect " (steel pipe is fast to the heat absorption of outside), influenced the overall appearance of warehouse simultaneously.By result of the test, only kept two days owing to the pipeline poor air-tightness in the 18-2 storehouse.The 01-1 storehouse stifling after 15 days concentration still do not reach equilibrium, it is slow illustrate that phosphine gas distributes, and does not reach effect rapidly and uniformly, has influenced insecticide efficiency.
2, by emerging state-owned grain depot Combined Trials of Chengdu Grain Storage Scientific Research Inst., Ministry of Domestic Trade and Guanghan City, Sichuan written " the real storehouse yielding ability site of deployment test effect report of " automatic fumigant insect killing machine outside the CX-ZXSII storehouse " ", what this technology was used is " automatic fumigant insect killing machine outside the CX-ZXSII storehouse " fumigation system that West China, Mianyang, Sichuan calculator factory produces, the grain face seals with the polyvinyl chloride film single face, the muffler of phosphine PVC stereoplasm tube, open three holes all around by 120 degree on the tube wall, whole wireway is two back-shaped serial connection shapes, be distributed in grain heap surface under the film, outboard tube pitch-row 15cm, aperture 2.5mm, all the other pores are apart from 25cm, aperture 1.5mm, adopt plunging re circulation fumigation work from top to bottom 2.5 hours, the unit administration amount is 2.5 gram/cubic meters (tablets), airtight 20 days, theoretical phosphine concentration is 0.83 gram/cubic meter, through surveying: maximum is 1.45 gram/cubic meters at the middle part after 26 hours, minimum of a value is 0.53 gram/cubic meter in edge, 74 hours rear edge least concentrations are 0.3 gram/cubic meter, peak is 0.83 gram/cubic meter in lower floor, minimum is 0.08 gram/cubic meter on the upper strata after 20 days, and peak is 0.3 gram/cubic meter in lower floor.From The above results, the unit administration amount has substantially exceeded three low grain storage standards of present promotion, phosphine gas concentration distributes slow, uneven in the grain heap, influenced insecticidal rate, while return air duct peripheral hardware part, it is attractive in appearance both to have influenced warehouse, easily cause the poison gas leakage again, cause environmental pollution, also brought " the heating installation effect " of peripheral hardware pipeline, moreover, phosphine gas is pressed into the grain heap from top to bottom, because phosphine and carbonic acid gas density are bigger than air, around causing easily and the dead angle at place, angle also causes excessive concentration zone (invalid utilization) easily.
3, one August in 999 year, Jiangsu Province grains bureau tissue by Beijing Liang Mao development in science and technology Co., Ltd, the recirculation fumigation plant (grain institute in Zhengzhou participates in research and design) that Bozhou state-owned grain depot and Zhengzhou grand full and accurate industry Development Co., Ltd provides, imitate grain depot in east, Xuzhou and carried out field trial, test cabin is 2 storehouses and 4 storehouses, the warehouse volume for long * wide * high=30 * 20 * 13 cubic metres, 4 meters of grain floor heights, adopted the outside circulation fumigation technology, offer medicine 5 kilograms, intermittently circulation is ten hours, divide four jiaos and middle 5 tests, survey phosphine concentration through twenty four hours: No. 2 storehouses: southeast 80ppm, northeast 180ppm, southwestern 70ppm, northwest 150ppm, middle 250ppm.No. 6 storehouses: southeast 100ppm, northeast 60ppm southwest 60ppm, northwest 100ppm, middle 100ppm.From result of the test, grain heap volume is 30 * 20 * 4=2400 cubic meter, 5 kilograms of dosages, dosage has substantially exceeded three minimum living grain boundaries, from detecting on the data, through twenty four hours, it is 250ppm that least concentration has only the 60ppm peak, lack of homogeneity, reveal seriously, illustrate the air-tightness of warehouse itself is had relatively high expectations, simultaneously except that having the common deficiency with above-mentioned two examples, during stifling, influence carrying out of normal storage work, increased labour intensity.
At present, domestic existing re circulation fumigation, the employing outside circulation that has, the film lower outer pipe circulation of the employing blank that has, their advantage is: (1) can reach the purpose of desinsection basically; (2) row easy for installation, easy; (3) airtight work is convenient.Their existing problems are: (1) unit administration amount is big; (2) gas distributes slowly in the grain heap, and the time is longer; (3) Outer Tube is exposed, influences overall appearance, easily reveals and causes into environmental pollution, easily causes " heating installation effect simultaneously; (4) the phosphine skewness causes into the dead angle; (5) be not easy to normally carrying out of every storage work; (6) apparatus expensive causes disposable having high input.
The purpose of this invention is to provide free from environmental pollutionly, and can make phosphine gas rapid equally distributed recirculating fumigation in house-type granary technology and equipment in silo.
The object of the present invention is achieved like this: recycle stream distributor sealing grain face in arranging, do the negative pressure test, check air-tightness, require the silo the blowing pressure to drop to time 〉=30 second of 250 handkerchiefs by 500 handkerchiefs, connect blower fan and phosphine generator then, blow in the machine filling CO 2 after five minutes, begin dispensing, circulation vapour-liquid distribution device in phosphine and carbon dioxide enter by fan action, (or ground cage) enters the grain heap after geosyncline by distributor uniform distribution to two air inlet pipe, the gas that refluxes slowly evenly rises from bottom to top, suck by the pore on the muffler on interior recycle stream distributor top and to enter blower fan again behind the recycle stream distributor in entering, under the effect of blower fan, recirculation fumigation grain in the gas reciprocation cycle is carried out in silo.
After dispenser finishes, remove the outer generator of silo, calculate required time T of gas circulation exchange according to capacity and fan parameter, circulation time is about 2T for the first time, and detectable concentration is according to the testing result decision circulation second time, after circulation time is about 2T for the second time, can remove blower fan.
Return air valve and air intake valve in interior circulation work stopping period should be closed on the recycle stream distributor.
For realizing the employed interior recycle stream distributor of technical scheme, two air inlet pipe of this device are passed the air inlet pipe hole on the distribution plate respectively, enter plenum chamber, an air inlet pipe stringer then, another air inlet pipe is walked crosswise, muffler passes the return-air pore on the distribution plate, connects main muffler, and main muffler connects goes up muffler.Last muffler connects several minutes muffler, and each divides and to also have a muffler on muffler, is provided with several pores on the arm propping up back.
Prop up the far and near difference of muffler by the last muffler of distance, its pore number difference promptly is 125 apart from the stomatal number on the last muffler muffler farthest and is 50 the most nearby, is 5: 4: 3 by stomatal number far away and near: 2.
Advantage of the present invention:
1, phosphine gas is evenly distributed, rapidly, has reduced the dead angle, has improved insecticide efficiency effectively.
2, control the grain temperature effectively and be in low state, kept grain heap ecotope preferably.
3, reduced the unit administration amount.
4, realized system's multi-functional.Can be used as the emergency measure of desinsection; The summer is spent in the low airtight insect protected of dose; The winter ventilation cooling; In and grain stack temperature (utilizing in the grain heap low-temperature space and grain heap high-temperature region).
5, reduced the disposable input of equipment, economical and practical.
6, because pipeline is built-in, be not subjected to external environmental interference, stopped " the heating installation effect " of pipeline peripheral hardware, kept the overall appearance of warehouse simultaneously yet.
7, stiflingly do not influence normally carrying out of storage work during airtight, reduced the people and contacted, guaranteed personal safety with poison gas.
8, equipment easy row easy for installation.
9, applied widely.Air-tightness requirement to the warehouse is not very high, and the old and new warehouse all can use, and has especially solved the stifling difficult problem of the chamber storehouse of poor air-tightness roof structure.
10, can keep the efficacy of a drug for a long time, make grain be in air-tight state for a long time, reduce labour intensity to greatest extent.
The present invention will be described below in conjunction with drawings and Examples.
Fig. 1 is a recirculating fumigation in house-type granary know-why block diagram.
Among the figure 1 and 1 ' be blower fan, 2 and 2 ' be phosphine generator, 3 and 3 ' be interior recycle stream distributor, 4 and 4 ' be geosyncline (or ground cage), 5 and 5 ' pile for grain.
Fig. 2 is interior recycle stream distributor structure chart.
Fig. 3 is that the A of Fig. 2 is to view.
Fig. 4 is that the B of Fig. 2 is to view.
(1) air inlet pipe, (2) flowmeter, (3) flange, (4) valve, (5) muffler, (6) distribution plate, (7) main muffler, (8) divide muffler, (9) to go up muffler, (10) muffler, (11) plenum chamber, (12) four-way, (13) return-air pore, (14) air inlet pipe hole among the figure.
Embodiment:
In one on August 24, in 999, this achievement is successfully implemented.Place: Xinyi National Grains Depot, Jiangsu Prov. 15 storehouses.Grain heap length * wide * high=30 * 21 * 6 is stored up grain 288.8 ten thousand kilograms.
1, facilities and equipments
(1) generator; Generator (north gate, 15 storehouse) outside the mantis board XZL-TV type storehouse that Jinxiang, Shandong grain machinery factory provides, the LM-FSQIII type controllable type gas generator (south gate, 15 storehouse) that Beijing Liang Mao development in science and technology Co., Ltd provides.
(2) circulation blower fan: self-control circulation blower fan (north gate, 15 storehouse), the portable micro computer programmed recirculation fumigation machine (south gate, 15 storehouse) of YHL6-II type that the grand full and accurate industry in Zhengzhou Development Co., Ltd provides.
(3) interior recycle stream distributor: self-control is used for north gate, 15 storehouse.
(4) checkout equipment: the HL-210 type phosphine gas detection alarm instrument that luxuriant Co., Ltd of the good good section in Beijing produces.
2, medicament: 2 kilograms of 56% aluminum phosphide tablets (being used for south gate, 15 storehouse) that the two water chestnut chemical industry Group Co.,Ltd in 2 kilograms of (being used for north gate, 15 storehouse) Jiangsu of 56% aluminum phosphate pill that Shenyang Agricultural Chemicals Factory produces produce
3, carbon dioxide steel cylinder gas: Jining second brewery produces, and 25 kilograms every bottle, totally 4 bottles (each 2 bottles at north and south door)
4, worm kind: divide upper, middle and lower-ranking to distribute, branch is established throwing, and the worm kind has corn weevil, lesser grain borer, ridge chest nitidulid, saw-toothed grain beetle totally ten places, and each 5 totally 20 of worm kinds are put at every place.
5, geosyncline distributes and is " doing " type, and the major trough sectional area is 0.4 square metre, and a wind slot cross-section is long-pending to be 0.25 square metre.
6, interior recycle stream distributor: top is antenna-like, the perforate that muffler (10) spacing is 3.75 meters mufflers from the near to the remote, quantity is 50,75,100,125, the aperture is length * wide=50 * 1 (square millimeter).
7, technical parameter: air inlet pipe (1) wind speed is 8.1 meter per seconds, and flow is 514 cubic metres/hour.Muffler (5) wind speed is 8.12 meter per seconds, and flow is 516 cubic metres/hour.Propping up muffler (10) mean wind speed is 1.14 meter per seconds.System's drag overall is 761 handkerchiefs, and the unit ventilation is 0.36 cubic metre/hour. ton.
8, method and step:
(1) arranges recycle stream device (pipeline all is distributed in the storehouse) in the distribution, arrange phosphine oxides gas test point and insect distributed points, sealing grain face.
(2) the grain feelings are checked, carry out record.
(3) connect blower fan.
(4) check air-tightness.Do PT test (negative pressure), system pressure declines to 250 handkerchiefs from 500 handkerchiefs, and time average is 45 seconds.
(5) dispensing, circulation.Open the carbon dioxide steel cylinder inflation earlier, circulation is offerd medicine after five minutes 4 kilograms (the north and south door carries out simultaneously, 2 kilograms of each dispensers), and dispensing finishes after two hours.Remove balling iron, circulation four hours (time of the complete circulation of gas is two hours 30 minutes), blowing-out machine and recirculation fumigation machine detect phosphine concentration.Start shooting again after six hours circulation four hours, detectable concentration is removed blower fan and recirculation fumigation machine, according to circumstances detects phosphine concentration later on.
8, interpretation of result
(1) phosphine concentration detection case (seeing Table 10,11)
Annotate: testing result is the result before the circulation for the second time, and the south gate blower fan used of circulation for the second time belongs to my storehouse self-control blower fan.
As can be seen from the above table, after six hours, phosphine gas distributes even substantially, does not have the dead angle with self-control blower fan circulation, does not also have excessive concentration or crosses low area, and is respond well.PH in the grain heap
3Concentration and time relation are seen Fig. 5.
(2) insect pest: September eight, Nikkei was looked into, insect all dead (the worm corpse parches).
(3) every technical parameter of interior recycle stream distributor and expense are propped up artificial situation (seeing Table 1 to table 9).
Table 1, circulation fan performance parameter list
Table 2, PH3 generator performance parameter table
Table 3, detector performance parameter table
Table 4, aluminum phosphate medicine situation
Table 5, blast pipe piezometry (mmH
2O)
Table 6, backwind tube piezometry (mmH
2O)
Table 7, grain face branch wind pipe piezometry (differential manometer is measured 0.2 grade)
Table 8, half life period are measured
Table 9, expense are propped up artificial situation
Southern PH in the table 10 grain heap
3The mensuration situation of concentration
Northern PH in table 11 heap
3The mensuration situation of concentration
| Machine models | Power (KW) | Air quantity (m 3／h) | Blast (Pa) | Rotating speed (rev/min) | Medium temperature (℃) |
| The portable recirculation fumigation machine of YHL6-II | 0．75 | 1000 | 1000 | 2800 | 20 |
| Autogamy circulation blower fan | 0．75 | 1000 | 1000 | 2800 | 20 |
| Producer | Model | Power (KW) | Specified formulation rate (kg) | The specified reaction time (h) | Rated pressure (kg/cm 2) |
| The Jinxiang, Shandong | XZL-IV | 0．15 | 8 | ＜2 | 2 |
| Beijing Liang Mao | LM-FSQIII | 0．15 | 8 | Arbitrarily | 2 |
| Manufacturer | Model | Detection range | Valid expiration date | Minimum indicating value | Detect error |
| Beijing luxuriant Co., Ltd of good good section | HL-210 type PH 3Gas detecting and alarming instrument | 0-2000PPM | 22 months | 0．1PPM | ≤5％ |
| Hebi City Gas Detecting Pipe Factory | PH 3Gas detecting tube | 25-1000PPM | To in January, 2003 | 50PPM |
| Manufacturer | Formulation | Date of manufacture | The term of validity | Service time | Dosage | This tests dosage |
| The two water chestnut chemical industry Group Co.,Ltd in Jiangsu | Tablet | 99．6 | 2 years | 99．8．24 | 56％ | 2kg |
| Shenyang Agricultural Chemicals Factory | Pill | 99．4 | 2 years | 99．8．24 | 56％ | 2kg |
| Measuring point | Vertical direction | Horizontal direction | ||||
| 0．25D | 0．5D | 0．75D | 0．25D | 0．5D | 0．75D | |
| Total head | 62．0 | 58．0 | 57．0 | 60．5 | 61．0 | 56．5 |
| Static pressure | 41．0 | 39．0 | 37．0 | 40．5 | 40．0 | 37．5 |
| Dynamic pressure | 21．0 | 19．0 | 20．0 | 20．0 | 21．0 | 19．0 |
| Measuring point | Vertical direction | Horizontal direction | ||||
| 0．25D | 0．5D | 0．75D | 0．25D | 0．5D | 0．75D | |
| Total head | -16．8 | -17．6 | -16．8 | -17．2 | -17．0 | -17．1 |
| Static pressure | -20．8 | -21．5 | -20．8 | -21．0 | -21．2 | -21 |
| Dynamic pressure | 4．0 | 4．1 | 4 | 3．8 | 4．2 | 3．9 |
| Measuring Time | Measuring method | The measuring point | Check and examine the people | Remarks | |||||
| Middle | The door limit | The wall limit | On average | 1 | 2 | 3 | |||
| 8．22 | The Pt test | 37 | 30 | 42 | 36．3 | ||||
| 8．23 | 40 | 39 | 42 | 40．3 | |||||
| 8．24 | 47 | 42 | 46 | 45．0 | |||||
| Stifling mode | The ALP expenses for medicine | CO 2Expense | Equipment takes | Labour cost | The electricity charge | Add up to | Average cost unit/ton | Save |
| Conventional | 972 | 590 | 600 | 2162 | 0．75 | 76％ | ||
| Interior circulation | 136 | 100 | 150 | 120 | 20 | 526 | 0．18 |
Claims (1)
- Claims1, a kind of recirculating fumigation in house-type granary technology, by blower fan, phosphine generator, air inlet pipe, muffler, recirculation fumigation grain, its characteristics are to seal the grain face, check air-tightness, require the blowing pressure in the silo to reduce to time 〉=30 second of 250 handkerchiefs by 500 handkerchiefs, blow in the machine filling CO 2 after five minutes, recycle stream distributor in phosphine and carbon dioxide enter by fan action, after being dispensed to two air inlet pipe by distributor, enter the grain heap through geosyncline (or ground cage), the gas that refluxes slowly rises from bottom to top, is sucked by the pore on the muffler on interior recycle stream distributor top, in entering behind the recycle stream distributor, enter blower fan again, under the effect of blower fan, gas reciprocation cycle, recirculation fumigation grain in silo, carrying out.2, recirculating fumigation in house-type granary technology according to claim 1, after it is characterized in that dispenser finishes, remove the outer generator of silo, calculate required time T of gas circulation exchange according to capacity and fan parameter, circulation time is about 2T, detectable concentration for the first time, according to testing result, decision is circulation for the second time, after circulation time is about 2T for the second time, can remove lingering remnants of past customs machine.3, room according to claim 1 formula silo re circulation fumigation, the return air valve and the air intake valve of recycle stream distributor mouth in circulation work stopping period should be closed in its characteristics were.4, realize the interior recycle stream distributor of claim 1, by air inlet pipe, muffler, distribution plate are formed, and it is characterized in that two air inlet pipe pass air inlet pipe hole, the inlet pipe stringer on the distribution plate respectively, and another air inlet pipe is walked crosswise, return-air pore on the interspersed undue matching board of muffler, connect main muffler, main muffler connects goes up muffler, and last gas-adding pipe connects several minutes muffler, also have a muffler on each branch muffler, on a muffler, be provided with several pores.5, interior recycle stream distributor according to claim 4, it is characterized in that the far and near difference of a muffler by the last muffler of distance, its pore number difference, promptly the stomatal number on the last muffler of the distance muffler farthest is 125, being 50 the most nearby, is 5: 4: 3 by stomatal number far away and near: 2.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99114467 CN1289536A (en) | 1999-09-24 | 1999-09-24 | Technique and equipment for recirculating fumigation in house-type granary |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99114467 CN1289536A (en) | 1999-09-24 | 1999-09-24 | Technique and equipment for recirculating fumigation in house-type granary |
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| Publication Number | Publication Date |
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| CN1289536A true CN1289536A (en) | 2001-04-04 |
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| CN 99114467 Pending CN1289536A (en) | 1999-09-24 | 1999-09-24 | Technique and equipment for recirculating fumigation in house-type granary |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102524383A (en) * | 2011-12-31 | 2012-07-04 | 中央储备粮漳州直属库 | Recirculation fumigation system and method for granary |
| CN104082407A (en) * | 2014-07-14 | 2014-10-08 | 安徽科杰粮保仓储设备有限公司 | Barn circulating fumigation system |
| CN108088958A (en) * | 2017-12-19 | 2018-05-29 | 中国农业生产资料流通协会 | A kind of phosphine concentration detection method applied to warehouse circulation fumigating system |
| CN115336571A (en) * | 2022-09-19 | 2022-11-15 | 安徽荣夏智能科技有限责任公司 | Fixed circulation system based on grain management |
-
1999
- 1999-09-24 CN CN 99114467 patent/CN1289536A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102524383A (en) * | 2011-12-31 | 2012-07-04 | 中央储备粮漳州直属库 | Recirculation fumigation system and method for granary |
| CN102524383B (en) * | 2011-12-31 | 2014-05-28 | 中央储备粮漳州直属库 | Recirculation fumigation system and method for granary |
| CN104082407A (en) * | 2014-07-14 | 2014-10-08 | 安徽科杰粮保仓储设备有限公司 | Barn circulating fumigation system |
| CN108088958A (en) * | 2017-12-19 | 2018-05-29 | 中国农业生产资料流通协会 | A kind of phosphine concentration detection method applied to warehouse circulation fumigating system |
| CN115336571A (en) * | 2022-09-19 | 2022-11-15 | 安徽荣夏智能科技有限责任公司 | Fixed circulation system based on grain management |
| CN115336571B (en) * | 2022-09-19 | 2023-08-08 | 安徽荣夏智能科技有限责任公司 | Fixed circulation system based on grain management |
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