CN1169658A - Fumigation of multiple storage with recirculating gaseous fumigant - Google Patents
Fumigation of multiple storage with recirculating gaseous fumigant Download PDFInfo
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- CN1169658A CN1169658A CN95196777A CN95196777A CN1169658A CN 1169658 A CN1169658 A CN 1169658A CN 95196777 A CN95196777 A CN 95196777A CN 95196777 A CN95196777 A CN 95196777A CN 1169658 A CN1169658 A CN 1169658A
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- bunker
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- recirculation circuit
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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
Abstract
The simultaneous fumigation of particulate commodities in any number of silos (10) of a storage facility comprising multiple silos, using recirculation of a gas containing fumigant from a single source (17) of fumigant, requires a gas recirculation circuit comprising a gas supply duct (13), a gas outlet duct (14) and a gas connection (15). The silos (10) are included in parallel in the recirculation circuit, their respective inlet ports (11) being connected via respective valves (19) to the gas supply duct (13) and their respective outlet ports (12) being connected to the gas outlet duct (14). Gas movement means (16) circulates gas through the recirculation circuit. A system control valve (25) maintains the pressure of gas in the gas supply duct at a predetermined value irrespective of the number of silos in the recirculation circuit. The gas inlet port (11) of each silo contains an orifice plate (20), the aperture of which is adjusted to ensure a required flow of gas through its associated silo from the gas supply duct. The single source of fumigant supplies fumigant to the gas supply duct (13) to maintain the concentration of fumigant in the gas supply duct at or above a predetermined minimum value.
Description
The present invention relates to sterilization to the granular article of storing.More particularly, the present invention relates to a kind of method and a kind of device, thus, contain the gas of the gaseous sterilizing agent of supplying with by an independent disinfectant source, can sterilize simultaneously at several article that independently store in the bunker (also weighing storehouse) of a bunkerage by circulation repeatedly.
By making gaseous sterilizing agent pass bunker and the granular article of being stored in the bunker (as cereal) is carried out disinfection repeatedly is a kind of sterilization process of having implemented a period of time.In U.S. Pat 4,200, set forth a kind of this type of disinfection technology in the specification of 657 (authorizing J.S.Cook).
Utilize the characteristics of all existing decontamination systems of the gaseous sterilizing agent of recirculation to be, according to said method by an independent sterilizing gas source can only sterilize a bunker or feed bin.Therefore, in the bunkerage with an above bunker, perhaps each bunker in (a) equipment or feed bin require to have an independent circulatory system that carries the sterilizing gas source; Perhaps (b) shown in Figure 1 as accompanying drawing, air inlet and an independent inlet manifold of each bunker or feed bin are linked, exhaust outlet and an independent exhaust main of each bunker or feed bin are linked, make with carrying the sterilizing gas that gas (normally air) mixes and be recycled to the inlet manifold, but the air inlet of each feed bin is provided with a close/open valve and at any time only the article of being stored in the feed bin in many feed bins equipment is carried out disinfection from exhaust main from an independent source of the gas.A kind of distinct disadvantage is to need many sterilizing gas source before in the above-mentioned chlorination equipment, thereby related many or portable circulating fan and many sterilant gas concentration sensors (if particularly the feed bin of bunkerage exists when leaking) will be arranged.The shortcoming of a kind of system in back comprises: (i) finish the required time lengthening of sterilization in all feed bins of equipment or bunker, when used disinfectant (a kind of of this type of disinfectant is hydrogen phosphide) needed long open-assembly time just can come into force, this shortcoming may be even more serious; (ii) before all bunkers or feed bin are carried out disinfection, the feed bin of having sterilized superinfection again, if particularly before disinfecting steps begins, when there have been disease and pest in the cereal in the more than one feed bin of bunkerage or other granular goods.
In the device shown in Figure 1 (this specification will describe in detail it hereinafter) of accompanying drawing, the close/open valve of only opening more than one feed bin or bunker air inlet is infeasible.Adopt the device of Fig. 1, be very difficult to realize making the air-flow of balance to pass more than one feed bin.The scale of each feed bin of bunkerage and structure may be identical, but, because cereal difference (the grade difference that perhaps contains the cereal of different worm dung amounts), different bunker pack completeness can produce different buffer brakes, and this buffer brake influence is passed the value of " opening " feed bin in the bunkerage from shared inlet manifold's air-flow.In addition, in order to prevent to flow into air at the suction side of blower fan, cause the concentration of disinfectant in the recyclegas to reduce, a basic requirement is that each feed bin must be airtight.
One object of the present invention is to provide a kind of device, thus, utilization contains the circulation repeatedly of the gas of gaseous sterilizing agent, just can the bunker or the feed bin of any amount in the feed bin bunkerage more than being carried out disinfection simultaneously by an independent gaseous sterilizing agent source of supply, all is airtight and need not feed bin.
Utilization the specification of international patent application No.PCT/AU90/00268 and in the specification of Australian patent application No.38649/93 a kind of improved form of disclosed many bunkers chlorination equipment and technology can reach above-mentioned purpose of the present invention.This device and specification requirement have an independent gaseous sterilizing agent source of supply that links with steam line or house steward, and the air inlet of described steam line or house steward and each bunker or feed bin links.The air inlet separately of each bunker or feed bin is provided with an adjustable orifice plate, so that make the air-flow that enters each bunker irrelevant substantially with the air-flow of other feed bin that enters bunkerage from house steward.
Improvement of the present invention has two aspects.At first, the exhaust outlet (each feed bin has an orifice plate at its air inlet place) of each feed bin and one second pipeline (exhaust main) are linked, this pipeline is taken over by the gas that a circulating fan (being also referred to as " air blast ") is housed and is linked to each other with the inlet manifold.Secondly, so the recirculation circuit of setting up is provided with a valve (with its called after system valve), when in recirculation circuit, increasing or remove a feed bin, this valve is regulated, maintain a value as described below so that guarantee the static pressure in air inlet or the steam line, promptly this value can provide required each the in running order bunker that passes bunkerage or the sterilizing gas stream of feed bin.That is to say, regulate the setting value of this system valve, with compensation fluctuation of static pressure in the steam line when the feed bin number that is sterilized changes; In following situation, changing can appear in the feed bin number that is sterilized: (a) when a bunker or feed bin are closed (for example, when a feed bin is about to emptying), when (b) feed bin of " closing " when a script in the bunkerage " is opened " sterilizing gas.
Therefore, according to the present invention, a kind of a plurality of bunkers or granular goods in the feed bin while method of disinfecting of an independent gaseous sterilizing agent source of supply to leaving bunkerage in of utilizing is provided, and each bunker or feed bin have an air inlet and an exhaust outlet, and said method comprises:
(a) air inlet with each bunker or feed bin is connected on the independent steam line;
(b) exhaust outlet with each bunker or feed bin is connected on the independent discharge duct;
(c) make above-mentioned steam line, above-mentioned discharge duct, an air transporting arrangement (as air blast or blower fan) and above-mentioned feed bin form a gas recirculation circuit, above-mentioned feed bin is connected in parallel in the above-mentioned recirculation circuit;
(d) in above-mentioned recirculation circuit, a system control valve is set in the downstream of above-mentioned gas conveying device, described system control valve is suitable for changing the static pressure in above-mentioned steam line, so that above-mentioned static pressure is maintained in a predetermined value or the predetermined number range;
(e) each air inlet of each feed bin is provided with an orifice plate with an adjustable opening, and regulate each adjustable opening, so that control enters the gas flow of the bunker that is associated, thereby keep the linear velocity substantially constant of gas in the article and the air inlet pressure substantially constant of the bunker that is associated;
(f) provide the source of supply of a gaseous sterilizing agent that operationally connects and provide gaseous sterilizing agent to above-mentioned loop with above-mentioned recirculation circuit.
According to the present invention, a kind of a plurality of bunkers of the bunkerage that comprises a plurality of bunkers or feed bin of being used for sterilizing simultaneously or the chlorination equipment of feed bin also are provided, each bunker or feed bin have an air inlet and an exhaust outlet, and above-mentioned chlorination equipment comprises:
(a) independent steam line, the air inlet of it and each bunker or feed bin links;
(b) independent discharge duct, the exhaust outlet of it and each bunker or feed bin links;
(c) gas between above-mentioned discharge duct and above-mentioned steam line is taken over, and comprises that above-mentioned steam line, above-mentioned discharge duct, above-mentioned gas are taken over and the gas recirculation circuit of above-mentioned bunker or feed bin so that form one; Described bunker or feed bin are in parallel in above-mentioned recirculation circuit;
(d) air transporting arrangement (for example air blast or blower fan) is included in the above-mentioned gas recirculation circuit;
(e) in above-mentioned recirculation circuit, be provided with a system control valve in the downstream of above-mentioned gas conveying device, above-mentioned system control valve is used to change the static pressure in above-mentioned steam line, so that above-mentioned static pressure is maintained a predetermined value or maintain within the predetermined value range;
(f) on each above-mentioned air inlet, comprise a corresponding orifice plate, every orifice plate has an adjustable opening, regulate this opening and can control the gas flow that enters the bunker that is associated with it, so that keep gas line speed substantially constant in the article and the air inlet pressure substantially constant of supplying with the bunker that is associated in the bunker that is associated;
(g) independent gaseous sterilizing agent source of supply that operationally is connected with above-mentioned gas recirculation circuit, it is suitable for providing gaseous sterilizing agent to above-mentioned recirculation circuit.
The sterilizing gas source of supply that any can be suitable for be used for this method and device (being included in the hydrogen phosphide source of supply of the encapsulation of the sort of type described in the specification of International Patent Application PCT/AU93/00270).If the disinfectant source of supply is a disinfectant gas tank, chlorination equipment preferably includes sterilant gas injection apparatus (unless consider adopting " once ejection " disinfection technology), and this injection apparatus guarantees that the decontaminant concentration in the recycle gas improves when reaching or be lower than a predetermined minimum of a value.The sterilant gas injection apparatus can comprise a sterilant gas sensor in steam line, this signal of sensor is by a program control micromessage processor monitoring, so that whenever the concentration of sterilant gas is reduced to one and predetermined provided additional sterilant gas when below horizontal in recirculation circuit.Another kind of scheme is, this device can comprise a mechanism that regularly sprays into a certain amount of disinfectant in the gas of recirculation, and the amount of its injection frequency and the disinfectant that added depends on the leak rate of measured feed bin.
These and other feature of the present invention will be in the following description illustrated that one embodiment of the present of invention are carried out.In the following explanation that only provides, be described with reference to the accompanying drawings with mode for example.
Fig. 1 schematically shows a kind of known chlorination equipment, adopts this device, utilizes the recirculation of the mixture of an independent sterilant gas source of supply and sterilant gas and carrying gas, many feed bins of the bunkerage of can sterilizing.
Fig. 2 has also represented feed bin bunkerage more than with schematic diagram, and wherein, each feed bin of this equipment is all sterilized simultaneously by a kind of preferred versions of the present invention.
In Fig. 1 and Fig. 2, adopted the common member of identical reference number mark diagram chlorination equipment.In each illustrated device, the bunker or the feed bin 10 that comprise three parallel connections in gas recirculation circuit, each feed bin has an air inlet 11 and an exhaust outlet 12, the above-mentioned gas recirculation circuit also comprises a steam line or house steward 13, discharge duct or 14, gas duct couplings 15 of house steward and air blast or blower fan 16.The source of supply of sterilant gas (is represented with a gas tank 17 that the pressurised mixt of carbon dioxide and hydrogen phosphide is housed in the drawings, but in fact can be the source of supply of any gaseous sterilizing agent that is suitable for) link with pipeline 13, spray into sterilant gas through a nozzle 18 as required.
Each bunker or feed bin 10 all are equipped with a certain amount of granular goods.The present invention is used for the sterilization that wheat is drawn, but any other granule state food (for example rice or edible beans) or any other the particle of granular goods that is stored in bunker or the feed bin all can adopt the present invention to carry out disinfection.Each air inlet of feed bin 10 is equipped with a close/open valve 19.
In the device of Fig. 1,, open the valve 19 of the air inlet that leads to a bunker or feed bin and close valve 19 on the air inlet of other feed bin for the article in the feed bin 10 of sterilizing.Then, utilize the disinfectant technology that circulates repeatedly, the feed bin that the valve 19 that is associated with it is opened carries out disinfection.When the sterilisation of objects in this feed bin is finished, the valve of opening 19 cuts out and one in other valve 19 is opened.Then, again the article in the opened feed bin of the valve that is associated with it 19 are carried out disinfection.This process repeats, and the stores in each feed bin of bunkerage has all obtained till the sterilization.
As mentioned above, when adopting hydrogen phosphide as disinfectant, the sterilization that utilizes the device shown in Fig. 1 to carry out a plurality of feed bins will spend many times, and, exist when to when being stored in article in another feed bin and carrying out disinfection, the article of having sterilized in a certain feed bin are the problem of subinfection again.
In device shown in Figure 2, in the gas recirculation circuit, comprise a system valve 25.Adopt this system valve 25 static pressure in the pipeline 13 can be maintained a predetermined value or the static pressure value is in the predetermined scope.
Usually, with the static pressure that adopts in the Pressure gauge 24 monitoring steam lines 13.Control to the setting of the system valve 25 that the static pressure in the pipeline 13 remained on required force value can be undertaken by an operator, this operator should observe Pressure gauge when following situation occurs: when (i) bunker stops sterilization and this bunker and breaks away from from recirculation circuit, and when (ii) a new bunker being added recirculation circuit.Another program is, also can automatically implement control by following operation to the setting of system valve 25, promptly utilize the signal of telecommunication that produces by Pressure gauge and it is imported one and be subjected to programme controlled microsignal processor 26, to produce a control signal, thereby drive a motor 27 (preferably step-by-step motor), this motor mechanically changes the setting value of system valve 25.This servo-drive system that is used to maintain the predetermined pressure in chamber, pipeline or the analog itself is known.
Each feed bin 10 is equipped with an orifice plate 20 at its air inlet place.The aperture of each orifice plate 20 can be regulated, and when the air pressure in the steam line 13 reaches its required predetermined value (or being in the predetermined value range), makes gas flow through the feed bin that is associated with orifice plate with desired rate thus.So, by opening corresponding valve 19 and regulating system valve 25, establishing required static pressure among pipeline or the house steward 13, can the article in the feed bin of the arbitrary number that is stored in bunkerage be carried out disinfection simultaneously.
Setting value by regulating system valve 25, make the pressure in the steam line 13 return to desired value, just can proofread and correct easily since open the valve 19 of originally closing so as to sterilize be stored in another bunker 10 article or owing to closing an opened valve 19 so that a feed bin 10 is removed the fluctuation of the air-flow that contains sterilant gas that (for example when the article in the feed bin will be unstowed) caused from disinfecting steps.When finishing the above-mentioned adjusting of system valve 25, the gas that contains disinfectant will pass " opening " feed bin or bunker 10 in parallel by corresponding desired rate once more simultaneously.
Can lean on manually and in the gas of recirculation, add disinfectant, so that compensation absorbs the loss that is caused because of leakage with by the article in the feed bin of sterilizing.For addition, require to monitor earlier the operation of storage system, so that rule of thumb determine the residing condition of storage feed bin used: the time that i) must in recycle gas, replenish disinfectant by the Artificial Control disinfectant; Ii) in order in recycle gas, to keep the least concentration of required disinfectant at least, need the amount of the disinfectant that adds.
This in recycle gas the operation of regular replenishment disinfectant can adopt a kind of metering device of form known automatically to carry out, the gas tank that this metering device and is equipped with the gaseous sterilizing agent of pressurization links and by a timer-operated solenoid operation.
But, add in recycle gas that disinfectant leaks with compensation and the preferred arrangement of absorption loss as shown in Figure 2.Concentration by the contained disinfectant of gas in a sterilant gas sensor 21 monitoring steam lines 13.The output signal of sensor 21 is passed to a microsignal processor 22 that can be made of one with microsignal processor 26.The output of microsignal processor 22 is suitable for controlling from gas tank 17 to steam line the supply of 13 gaseous sterilizing agent.Whenever showing the concentration of hydrogen phosphide (or other gaseous sterilizing agent) in pipeline 13, the output signal from disinfectant sensor 21 reduced to predetermined value when following, microsignal processor 22 just makes gas tank 17 give off more disinfectant, and the concentration of disinfectant at least returns to till the predetermined value in recycle gas.Utilize this device, can automatically increase the concentration of disinfectant in the recycle gas, so that keep a required minimum and compensate the different air-loss rate of each feed bin 10.
Gas tank 17 can be installed on the platform balance 23.Use platform balance 23 to monitor the quantity of liquid gas residual in the gas tank 17.If desired, can comprise the equipment with form known in chlorination equipment, if the liquid gas in the gas tank 17 reaches lower limit, this equipment can send alarm signal.
An advantage shown in Figure 2 and above described chlorination equipment is: the gas by each feed bin that passes bunkerage with same line speed is provided and make the air inlet pressure of each feed bin identical, can make the leakage at feed bin top, or in other words, the leakage in feed bin bottom or the base has minimum influence.But, if all being sealed to the distribution of leaking between the extremely low leak rate of an airtight standard and each feed bin or the feed bin, feed bin 10 almost do not have difference, be easy to realize making disinfectant in each feed bin of system, to distribute satisfactorily.Under these conditions, the decontaminant concentration in recycle gas to reduce speed very low.The main loss of disinfectant only just by the storing products in the feed bin absorption caused.Therefore, if the sterilant gas that once sprays in the recirculation circuit can make the decontaminant concentration in the recycle gas be not less than required least concentration when the disinfection cycle of regulation stops, then can implement the disinfection technology of " once spraying into ".On the other hand, the sterilant gas source of supply (as configuration (formulation)) that preferably in recirculation circuit, can comprise one " slowly discharging " in a kind of encapsulation described in the specification of International Patent Application PCT/AU93/00270, in this technology, the new disinfectant that produces will compensate the small leakage of feed bin and the disinfectant that is absorbed by storing products, therefore, in whole disinfecting process, all can obtain low-level (but acceptable) sterilization dose.
When feed bin 10 have bigger leakage-and the leakage of each feed bin may there are differences-time, as shown in Figure 2, the supply that utilizes microsignal processor control disinfectant is with particularly useful.If porose on the top of feed bin and bottom, gas then may occur and overflow from the hole of bottom, extraneous air infiltrates from the hole on top, consequently can cause the concentration of gaseous sterilizing agent thinning rapidly.In the case, sensor 21 and the microsignal processor 22 that is associated with it will guarantee to keep all the time the concentration of predetermined sterilant gas in the gas of supplying with feed bin 10.
Can recognize, pressure parameter in the recirculation circuit should reach following requirement, if promptly the sidewall of the bottom of each feed bin 10 and each feed bin 10 seals substantially and does not have a leakage, the air of dilution will can not be inhaled in the recirculation circuit by the hole on the feed bin top, even the varying in size of the hole on the different feed bin.Equally, if the sidewall of the top of feed bin and feed bin seals substantially, the air of dilution will can not be inhaled into recirculation circuit by the hole on the feed bin bottom.
Though mentioned hereinbefore at Australian Patent No.AU640, SIR0FLO sterilization method described in the specification of 699 (Australian patent application that stem from the mandate of international patent application No.PCT/AU 90/00268) and at the hydrogen phosphide source of supply described in the specification of international patent application No.PCT/AU 93/00270, but and nonessential employing hydrogen phosphide as sterilant gas.Any suitable gaseous sterilizing agent be can adopt in the present invention, carbonyl sulfide and cyanogen comprised.
When writing this specification, carrying out test of the present invention.Above-mentioned test is being carried out at scene, Black Hills in Australian Australian provincial capital district Commw Scient Ind Res Org, and the storage capacity that has built up each bunker there respectively is 50 tons the bunkerage that comprises three bunkers.The top of each bunker is provided with the dismountable circular hand hole that a diameter is 148mm.The bottom of each bunker or pedestal are provided with the dismountable circular hand hole that a diameter is 100mm.Because it is airtight that each above-mentioned bunker all is configured to, hand hole is used to simulate the leakage that takes place from the top and the bottom of feed bin.Testing equipment is except the control that does not comprise microsignal processor 22 and the gas from gas tank 17 output is associated, bunker formula feed bin is designed to as shown in Figure 2, therefore utilizes a timer-operated metering device that sterilant gas (hydrogen phosphide) is sprayed into steam line by artificial with (recently).
These tests of having carried out cun month show no matter comprise one, two still three feed bins in the gas recirculation circuit, are effective aspect the valid density of the sterilant gas of the present invention in keeping feed bin.Especially, test shows:
(a) since the top (only herein) of feed bin exist and leak (until and comprise three hand hole cover complete removals), the minimizing speed of hydrogen phosphide and the gross area exponent function relation of " leakages ", its variations is as follows: during the nothing leakage, y=32.979e
-0.178X (y is a leak rate in the formula, and x is the gross area that leaks); When the top leak that a diameter is arranged is 148mm and three feed bins are all in recirculation circuit, y=185.9e
-2.7163xWhen three feed bins all are in the recirculation circuit and the hand hole cover at three tops when all being removed, y=3203e
-5.1911x
(b) exist when leaking in the pedestal (only herein) of bunker, the leakage result at the result of its leakage and Cang Ding place is similar, but its degree is not too obvious, and its variation is as follows: when the pedestal that has only a feed bin has a diameter to be the leak of 100mm, and y=41.359
-0.2759xWhen the base leak that a diameter is arranged is 100mm and three feed bins all are in the recirculation circuit, y=51.529e
-0.3361x
(c) because the top and the pedestal (bottom) of bunker all has opening, the minimizing speed of hydrogen phosphide with only have when leaking the result of observation similar at the top; And
(d) deposit in all configurations of equipment in many warehousings, by regularly spraying into hydrogen phosphide, might keep the effective least concentration of hydrogen phosphide in the decontamination system, and many storehouses disinfection technology of the recirculation that the time interval of adding hydrogen phosphide is made adopt the gas that contains disinfectant is very economical, the amount of required gaseous sterilizing agent is less than employing at Australian Patent No.AU640, the amount of required gaseous sterilizing agent in flow type system during " SIROFLO " technology described in 699 the specification.
Though should be noted that and for example understand several exemplary embodiments of the present invention in this manual,, under the prerequisite that does not depart from design of the present invention, can change and improve the foregoing description.
Claims (17)
1. one kind is utilized an independent gaseous sterilizing agent source of supply, and to the while of the granular article in a plurality of bunkers that are stored in bunkerage method of disinfecting, each bunker has an air inlet and an exhaust outlet, and said method comprises:
(a) air inlet with each bunker is connected on the independent steam line;
(b) exhaust outlet with each bunker is connected on the independent discharge duct;
(c) make above-mentioned steam line, above-mentioned discharge duct, an air transporting arrangement and above-mentioned bunker form a gas recirculation circuit, above-mentioned bunker is in parallel in above-mentioned recirculation circuit;
(d) in above-mentioned recirculation circuit, a system control valve is set in the downstream of above-mentioned gas conveying device, above-mentioned system control valve is used to change the static pressure in above-mentioned steam line, so that above-mentioned static pressure is maintained a predetermined value or the static pressure value is maintained in the predetermined scope;
(e) at each air inlet place of each feed bin an orifice plate with an adjustable aperture is set, and regulate each adjustable aperture, enter the air-flow of the feed bin that is associated with control, thereby keep the air inlet pressure substantially constant of the linear velocity substantially constant of gas in the article and the bunker that is associated; With
(f) a gaseous sterilizing agent source of supply that operationally connects with above-mentioned recirculation circuit and provide gaseous sterilizing agent to above-mentioned loop is set.
2. sterilization method as claimed in claim 1 is characterized in that, may further comprise the steps, and promptly monitors the concentration of disinfectant in the above-mentioned steam line and when the concentration of disinfectant is lower than a predetermined value, disinfectant is sprayed into above-mentioned steam line.
3. sterilization method as claimed in claim 1 is characterized in that, may further comprise the steps, and the disinfectant that is about to scheduled volume sprays into above-mentioned gas recirculation circuit termly.
4. sterilization method as claimed in claim 3 is characterized in that, the above-mentioned injection of disinfectant is to spray in the above-mentioned steam line.
5. as the described sterilization method of above-mentioned each claim, it is characterized in that disinfectant is a hydrogen phosphide.
6. the chlorination equipment of a plurality of bunkers of the bunkerage comprising a plurality of bunkers of being used for sterilizing simultaneously, each bunker has an air inlet and an exhaust outlet, and described chlorination equipment comprises:
(a) independent steam line, the air inlet of it and each bunker links;
(b) independent discharge duct, the exhaust outlet of it and each bunker links;
(c) gas between above-mentioned discharge duct and above-mentioned steam line is taken over, and comprises that with formation above-mentioned steam line, above-mentioned discharge duct, above-mentioned gas are taken over and a gas recirculation circuit of above-mentioned bunker; Above-mentioned bunker is connected in parallel in the described gas recirculation circuit;
(d) in above-mentioned gas recirculation circuit, comprise air transporting arrangement;
(e) system control valve that in the above-mentioned gas recirculation circuit, is arranged on above-mentioned gas conveying device downstream, above-mentioned system control valve is used for changing the static pressure of above-mentioned steam line, so that above-mentioned static pressure is remained in a predetermined value or the predetermined value range;
(f) corresponding orifice plate that is included on each above-mentioned air inlet, every orifice plate has an adjustable aperture, set up this aperture and can control the air-flow that enters the bunker that is associated with it, so that the linear velocity substantially constant of the gas in the article and supply with the air inlet pressure substantially constant of the bunker that is associated in the bunker that keeps being associated; With
(g) independent gaseous sterilizing agent source of supply, it operationally links to each other with above-mentioned gas recirculation circuit, and is suitable for providing gaseous sterilizing agent in above-mentioned loop.
7. chlorination equipment as claimed in claim 6 is characterized in that, also comprises a sterilant gas sensor that is arranged in above-mentioned steam line, and above-mentioned gas sensor is suitable for monitoring the decontaminant concentration in the gas in the above-mentioned steam line.
8. chlorination equipment as claimed in claim 7 is characterized in that,
(a) above-mentioned independent gaseous sterilizing agent source of supply is a gas tank that the above-mentioned gaseous sterilizing agent of pressurization is housed, and above-mentioned gas tank has an exhaust outlet that links with above-mentioned steam line;
(b) the sensor produces one first signal of telecommunication, is presented at the decontaminant concentration at the sensor place; And
(c) make above-mentioned first signal input one use programme controlled microsignal processor, produce one second signal of telecommunication, it is suitable for controlling from the supply of above-mentioned gas tank to the sterilant gas of above-mentioned steam line supply.
9. chlorination equipment as claimed in claim 6, it is characterized in that, above-mentioned independent gaseous sterilizing agent source of supply links by a gas ejector and above-mentioned gas recirculation circuit, and this gas ejector is suitable for spraying into termly the above-mentioned gaseous sterilizing agent of scheduled volume in the above-mentioned gas recirculation circuit.
10. chlorination equipment as claimed in claim 9 is characterized in that, above-mentioned injector is applicable to gas is sprayed into above-mentioned steam line.
11. each the described chlorination equipment as in the claim 6 to 10 is characterized in that, comprises a Pressure gauge that operationally is connected with above-mentioned steam line, so that monitoring static pressure wherein.
12. chlorination equipment as claimed in claim 11, it is characterized in that, above-mentioned Pressure gauge is suitable for producing a signal of telecommunication that is presented at the pressure in the above-mentioned steam line, above-mentioned one of the signal of telecommunication input that is produced by Pressure gauge is suitable for controlling the system valve controller of the setting of described system valve, so that the pressure in the above-mentioned steam line is maintained in the described preset range of a described predetermined value or force value.
13. chlorination equipment as claimed in claim 12, it is characterized in that, above-mentioned system valve controller comprises a microsignal processor, it is suitable for receiving the above-mentioned signal that is sent by Pressure gauge and produces an output signal, the setting of the motor that this output signal control and said system valve operationally link to each other.
14. each the described chlorination equipment as in the claim 6 to 13 is characterized in that described disinfectant is a hydrogen phosphide.
15. chlorination equipment as claimed in claim 6 is characterized in that, (i) each bunker in the above-mentioned bunkerage all is sealed to an airtight standard; (ii) described disinfectant is a hydrogen phosphide; And comprise in above-mentioned steam line that (iii) a configuration that discharges hydrogen phosphide, described configuration are suitable for to be enough to keep the speed release hydrogen phosphide of acceptable phosphine concentration in above-mentioned recirculation circuit.
16. sterilization method as claimed in claim 1 is basically as hereinbefore with reference to the description that Fig. 2 carried out of accompanying drawing.
17. chlorination equipment as claimed in claim 6 is basically as hereinbefore with reference to the description that Fig. 2 carried out of accompanying drawing.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AUPN0044 | 1994-12-14 | ||
| AUPN0044A AUPN004494A0 (en) | 1994-12-14 | 1994-12-14 | Fumigation of multiple storages with recirculating gaseous fumigant |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1169658A true CN1169658A (en) | 1998-01-07 |
| CN1065717C CN1065717C (en) | 2001-05-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95196777A Expired - Fee Related CN1065717C (en) | 1994-12-14 | 1995-12-13 | Fumigation of multiple storage with recirculating gaseous fumigant |
Country Status (4)
| Country | Link |
|---|---|
| CN (1) | CN1065717C (en) |
| AU (2) | AUPN004494A0 (en) |
| WO (1) | WO1996018307A1 (en) |
| ZA (1) | ZA9510647B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101036484B (en) * | 2007-02-13 | 2010-12-08 | 郦宏 | Device for storing farm products |
| CN102823642A (en) * | 2012-09-20 | 2012-12-19 | 天津捷盛东辉保鲜科技有限公司 | Fruit and vegetable mildew-proof storage device |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2312835B (en) | 1996-12-18 | 1998-08-12 | Pegasus Airwave Ltd | Patient supports and methods of operating them |
| CN113632778A (en) * | 2021-06-30 | 2021-11-12 | 北京长丰诚耀技术服务中心 | Four-in-one sterilization and killing device and movable sterilization and killing vehicle |
| CN114371261A (en) * | 2022-01-18 | 2022-04-19 | 南京林业大学 | Smoking system based on wireless sensing technology and manufacturing method thereof |
| CN114710540B (en) * | 2022-06-06 | 2022-09-02 | 济宁圣城化工实验有限责任公司 | Aluminum phosphide medicine warehouse remote monitoring protection system and alarm device |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4200657A (en) * | 1978-11-09 | 1980-04-29 | Cook James S | Low air flow fumigation method |
| YU45563B (en) * | 1982-07-26 | 1992-07-20 | Dr. Werner Freyberg Chemische Fabrik Delitia Nachf | PROCEDURE FOR PHASPHINE GAS TREATMENT OF BULK MATERIAL |
| HU209049B (en) * | 1989-06-27 | 1994-03-28 | Commw Scient Ind Res Org | Treating method and apparatus carrying out with phosphine gas |
| AU664444B2 (en) * | 1989-06-27 | 1995-11-16 | Commonwealth Scientific And Industrial Research Organisation | Fumigation apparatus |
| AU685467B2 (en) * | 1993-06-15 | 1998-01-22 | Commonwealth Scientific And Industrial Research Organisation | Improved fumigation of particulate commodities |
-
1994
- 1994-12-14 AU AUPN0044A patent/AUPN004494A0/en not_active Abandoned
-
1995
- 1995-12-13 AU AU42930/96A patent/AU686491B2/en not_active Expired
- 1995-12-13 CN CN95196777A patent/CN1065717C/en not_active Expired - Fee Related
- 1995-12-13 WO PCT/AU1995/000844 patent/WO1996018307A1/en active Application Filing
- 1995-12-14 ZA ZA9510647A patent/ZA9510647B/en unknown
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101036484B (en) * | 2007-02-13 | 2010-12-08 | 郦宏 | Device for storing farm products |
| CN102823642A (en) * | 2012-09-20 | 2012-12-19 | 天津捷盛东辉保鲜科技有限公司 | Fruit and vegetable mildew-proof storage device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1065717C (en) | 2001-05-16 |
| AU4293096A (en) | 1996-07-03 |
| ZA9510647B (en) | 1996-08-16 |
| AU686491B2 (en) | 1998-02-05 |
| WO1996018307A1 (en) | 1996-06-20 |
| AUPN004494A0 (en) | 1995-01-12 |
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| SE01 | Entry into force of request for substantive examination | ||
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Granted publication date: 20010516 Termination date: 20101213 |