CN108131767B - Multifunctional temperature and humidity control device for granary - Google Patents
Multifunctional temperature and humidity control device for granary Download PDFInfo
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- CN108131767B CN108131767B CN201810132354.XA CN201810132354A CN108131767B CN 108131767 B CN108131767 B CN 108131767B CN 201810132354 A CN201810132354 A CN 201810132354A CN 108131767 B CN108131767 B CN 108131767B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/28—Arrangement or mounting of filters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/30—Arrangement or mounting of heat-exchangers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
- F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
- F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F7/00—Ventilation
- F24F7/04—Ventilation with ducting systems, e.g. by double walls; with natural circulation
- F24F7/06—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit
- F24F7/08—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit with separate ducts for supplied and exhausted air with provisions for reversal of the input and output systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
- F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
- F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
- F24F2003/144—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification by dehumidification only
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Drying Of Solid Materials (AREA)
- Storage Of Harvested Produce (AREA)
Abstract
The invention discloses a multifunctional temperature and humidity control device for a granary, which belongs to the field of grain storage and granary temperature and humidity control, and comprises cooling equipment arranged outside the granary, wherein the granary is connected with a cooling equipment gas circuit through a granary inner return air pipeline and a granary inner air supply pipeline which are arranged in an upper space of a granary wall; the grain stack air duct pipeline is connected to the bottom of the grain bin and is connected with the air path of the cooling equipment; the grain stack air duct is characterized in that an in-bin return air valve is arranged in the in-bin return air duct, an in-bin air supply valve is arranged in the in-bin air supply duct, and a grain stack air duct valve is arranged in the grain stack air duct. Compared with the prior art, the mobile equipment is improved in cooling to be fixedly installed, and a foundation is laid for grain storage automation; meanwhile, the device has the functions of cooling the inside of the grain pile and controlling the temperature of the surface layer of the grain pile, and solves the problems that the temperature control equipment is easy to damage grains and fumigate and corrode when installed in a bin; and has a selectable air supply mode function.
Description
Technical Field
The invention belongs to the field of grain storage and granary temperature and humidity control, and particularly relates to a multifunctional temperature and humidity control device for a granary.
Background
At present, a large amount of grains are stored in a grain warehouse in China, and the temperature of a grain pile needs to be frequently reduced and controlled in order to ensure the safety and fresh keeping of the grains. The grain depot is generally required to adopt a movable grain cooler or a grain whole-bin cooling and storing unit with similar functions, and the interior of the grain pile is specially cooled. Because of mobile use, the temperature reduction operation is carried out in turn according to the temperature of each granary. And the grain cooler has large head and inconvenient movement and use. Meanwhile, the roof of the granary has large heat and the temperature is easy to rise; particularly in summer, the temperature of the space in the bin needs to be reduced every day so as to keep the temperature of the grain pile within the safe or low-temperature fresh-keeping temperature. At this time, a grain pile surface layer temperature control unit is fixedly installed in the grain bin in addition, but in the prior art, the equipment cannot cool and control the temperature in the grain pile, so that the grain bin can ensure the proper temperature of the whole grain pile by using two sets of equipment together.
The movable cooling grain storage unit adopted in the prior art needs manual pushing, and a manual connection circuit, a return air supply pipeline, other auxiliary water pipelines and the like can not realize automatic operation of grain storage equipment.
In the aeration-cooling process of the grain depot, the forced ventilation of the grain pile discharged from the space in the bin by using the ground cage ventilation device or the suction ventilation of the grain pile fed from the space in the bin and sucked from the ground cage ventilation device is often selected according to the seasons, the varieties of grains, the distribution condition of the grain temperature, the distribution condition of the grain moisture and the like. Both ventilation modes have advantages and disadvantages, and the upper layer and the lower layer of the grains stored in the warehouse cannot keep the temperature and the humidity basically consistent. The existing ventilation cooling equipment cannot realize two modes in the same granary, and condensed water leakage is easy to occur in a grain pile surface layer temperature control unit installed in the granary, so that the grains are moldy, damaged and the like. When the equipment is arranged in the bin to cause fumigating and disinfestation operation of a grain depot, particularly copper materials in the equipment are more easily corroded by fumigating chemical agents, and the service life of the equipment is seriously influenced.
In addition, in the prior art, the cooling equipment for the grain depot is mainly divided into a full fresh air working mode and a return air working mode. The former has high operation cost, and the latter has high energy consumption when controlling the temperature of the space in the bin, and the two purposes of energy conservation and emission reduction are difficult to achieve. The cooling equipment used in the prior grain depot respectively needs to use one set of machine set to complete the cooling function of the grain depot grain pile and the temperature control of the space in the grain depot, which does not meet the development requirement of the prior industrial equipment. Aiming at the defects of the prior art, the invention also provides cooling equipment which combines the two functions of cooling the grain pile of the grain depot and controlling the temperature of the space in the grain depot, thereby greatly facilitating the operation management of the grain depot and reducing the initial investment cost of the grain depot.
Disclosure of Invention
Aiming at the problems, the invention provides a multifunctional temperature and humidity control device for a granary, which improves the temperature reduction by using mobile equipment in the prior art and installs and fixes the position of the granary, thereby laying a foundation for automatic grain storage; meanwhile, the invention combines the cooling of the interior of the grain pile and the temperature control of the cabin space on the surface layer of the grain pile into a whole, and the equipment is arranged outside the cabin, thereby solving the problems that condensed water is easy to leak and damage grains when a surface layer temperature control unit is arranged in the cabin, and the temperature control equipment is easy to be fumigated and corroded; and through adjustable wind path switching, the selectivity of push-in type and suction type air supply is realized.
According to the technical scheme, the method for cooling the interior of the grain pile and controlling the temperature of the space of the granary is achieved, the grain depot can select the mode of cooling the interior of the grain pile or controlling the temperature of the space of the granary according to own requirements, and meanwhile, the pressing-in mode and the sucking-out mode can be selected when cooling the interior of the grain pile, so that the temperature and the moisture of the upper layer and the lower layer of the whole grain pile are uniform and balanced.
The scheme of the invention is as follows:
the multifunctional temperature and humidity control device for the granary comprises cooling equipment arranged outside the granary, wherein the granary is connected with a cooling equipment air circuit through an in-granary return air pipeline and an in-granary air supply pipeline which are arranged in the upper space of the granary wall; the grain stack air duct pipeline is connected to the bottom of the grain bin and is connected with the air path of the cooling equipment; the grain stack air duct is characterized in that an in-bin return air valve is arranged in the in-bin return air duct, an in-bin air supply valve is arranged in the in-bin air supply duct, and a grain stack air duct valve is arranged in the grain stack air duct.
Further, openings of the in-bin return air pipeline and the in-bin air supply pipeline in the bin wall are arranged above the grain stacking line of the granary.
Furthermore, the in-bin return air valve, the in-bin air supply valve and the grain stack air path valve are all filtering dust removal valves.
Further, the device also comprises a ground cage ventilation device arranged at the bottom of the granary, wherein the ground cage ventilation device is connected with a grain pile air path pipeline through a ground cage ventilation opening so as to connect the bottom of the granary with a cooling device air path.
Further, the cooling device comprises a refrigerating system, one end of the refrigerating system is connected with an air passage of an in-bin return air pipeline, the other end of the refrigerating system is connected with an air passage of an air supply static pressure box, an evaporation fan is further arranged between the air supply static pressure box and the air passage of the refrigerating system, and the outer part of the air supply static pressure box is respectively connected with an in-bin air supply pipeline and an air passage pipeline of the grain stack.
Further, an evaporator is further arranged in the refrigerating system, and the evaporator is used for cooling and dehumidifying the gas.
Specifically, when the cooling equipment is adopted to cool the grain pile, the in-bin return air valve and the grain pile air path valve are opened, and the in-bin air supply valve is closed. The air in the barn is processed by a filter, cooled and dehumidified by an evaporator in a refrigerating system through an in-barn return air pipeline, and then the air reaches an air supply static pressure box, low-temperature air is sent into a grain pile air path pipeline by an evaporating fan, and is sent into the barn through an overground cage ventilation opening of a grain depot through a grain pile air path valve. The low-temperature air passes through the grain pile and enters the refrigeration equipment through a return air pipeline connected with the space in the top bin. Through the repeated circulation, the temperature and humidity of the grains in the warehouse are reduced to be within a set range.
In the arrangement, the selection of the evaporator is further increased, and the cooling and dehumidifying treatment of the gas is more beneficial to improving the storage effect of grains in the bin.
When the cooling equipment is adopted to control the temperature of the surface layer of the space in the granary, the air supply valve in the granary and the return air valve in the granary are opened, the air path valve of the grain pile is closed, the return air in the granary is processed by the filter, and after the cooling and dehumidifying treatment is carried out by the evaporator in the refrigerating system through the return air pipeline in the granary, the air reaches the air supply static pressure box, and the low-temperature air is sent into the space in the granary through the air supply valve in the granary and the air supply pipeline in the granary by the evaporating fan, so that the surface temperature of the space in the granary and the grain pile is reduced. The low-temperature air after absorbing heat is changed into high-temperature air which enters the refrigeration equipment from the return air pipeline. The temperature and humidity of the space in the bin and the surface of the grain pile are controlled within a set range through a cycle process.
In summary, since the equipment adopts different air supply systems, the systems are not interfered with each other. Meanwhile, different air valves are switched at any time according to the requirements to realize the functions of cooling two grain piles and controlling the temperature of the surface layer of the space in the cabin.
Further, the cooling device is of an integral cooling structure or a split cooling structure.
As described above, the technical scheme of the multifunctional temperature and humidity control device comprises a grain pile cooling method and a granary space temperature control method, wherein the grain pile cooling method comprises an aspiration type grain pile cooling method and a pressing type grain pile cooling method.
The sucking grain pile cooling method comprises the following steps:
s1, closing an in-bin return air valve to cut off an air flow passage between the in-bin return air valve and cooling equipment, and opening an in-bin air supply valve and a grain stack air passage valve;
s2, air flow in the granary is filtered and sequentially transmitted to cooling equipment through an on-ground cage ventilation opening, a grain stack air path valve and a grain stack air path pipeline in the granary for cooling and dehumidifying;
s3, the processed air flow passes through an in-bin air supply pipeline and is sent to the top of the grain pile by an in-bin air supply valve so as to cool the inside of the grain pile.
The suction type ventilation is negative pressure ventilation, and external air enters the grain pile from the grain surface by utilizing the suction force generated by the fan and is discharged outside the bin or enters the refrigeration equipment through the air duct. The suction type ventilation is mainly used for introducing high-humidity air into the grain pile before grain processing so as to improve the quality of the grain processing technology.
The method for cooling the pressed grain pile comprises the following steps:
s1, closing an in-bin air supply valve to cut off an air flow passage of the in-bin air supply valve and cooling equipment, and opening an in-bin return air valve and a grain stack air passage valve;
s2, air flow in the granary is filtered and sequentially transmitted to cooling equipment through an in-granary return air valve and an in-granary return air pipeline to be cooled and dehumidified;
s3, the processed air flow is sent to the bottom of the grain pile through a grain pile air path valve, a grain pile air path pipeline and a cage ventilation opening in the grain depot to cool the interior of the grain pile.
The forced ventilation is positive pressure ventilation, the external air is pressed into the grain pile through the air duct by utilizing the pressure generated by the fan, the wet heat exchange is carried out in the grain pile, then the air is discharged from the grain surface, and the air is discharged out of the bin through the door bin or enters the refrigeration equipment through the return air pipeline connected with the bin body. The ventilation mode is mainly used for heating, cooling and ventilation of the upper layer in the grain pile.
In the two grain pile cooling methods, the opening/closing states of the air supply valve and the air return valve in the bin can be exchanged arbitrarily according to the needs in any selected cooling method, and the forced or sucked cooling method for the grain pile can be realized by keeping the air path valve of the grain pile normally open under the condition that the flow direction of the air path is unchanged.
In the prior art, the two methods of pressing-in ventilation and sucking-out ventilation are adopted independently, so that the problem of non-uniformity of temperature and humidity distribution of grains at the middle and lower layers of the whole grain stack can not be solved well when the grain layers are thicker or the moisture is not easy to balance. The unique component arrangement adopted in the invention combines the forced ventilation and the suction ventilation to solve the problems, and can improve the storage stability and the storage quality of grains.
Further, the granary space temperature control method comprises the following steps:
s1, closing a grain pile air path valve to cut off an air flow path of an overground cage ventilation opening and cooling equipment, and opening an in-bin air supply valve and an in-bin return air valve;
s2, the air flow in the granary is filtered and sequentially passes through an in-granary return air valve, and the in-granary return air pipeline is transmitted to cooling equipment for cooling and dehumidifying treatment;
s3, the processed air flow passes through an in-bin air supply pipeline and is then sent into a granary space at the top of the grain pile by an in-bin air supply valve to perform surface layer temperature control.
After the temperature of the grains in the grain depot is maintained in a set temperature range, the temperature of the grain pile surface layer and the grain depot space is greatly influenced by the outside environment temperature so as to maintain the temperature in the set range. The equipment opens the air supply valve in the bin, closes the air passage valve of the grain pile, returns air in the bin after being treated, and is sent into the grain bin space through the air supply pipeline of the bin space by the fan, after the hot air in the bin space and grains on the surface layer of the grain pile are cooled, the cold air is changed into hot air, and then enters the cooling equipment outside the bin through the return air pipeline of the bin space and is cooled into low-temperature air again.
Through the repeated circulation, the temperatures of the granary space and the surface layer of the grain pile are reduced to be within a set range. The system realizes the functions of cooling the interior of the grain pile in the grain depot and controlling the temperature of the surface layer of the grain depot space through the switching of different air valves.
Compared with the existing control method, the invention has the beneficial effects that:
(1) Corrosion prevention
The grain depot fumigates and uses chemicals such as phosphine and the like to seriously corrode metal equipment in the grain depot, so that the failure rate of the equipment is increased, and the service life of the equipment is influenced. The invention installs the equipment outside the bin, which can easily seal the position of the air port in the bin, thereby avoiding the corrosion of the equipment.
(2) The danger of condensate leakage is eliminated
The grain storage equipment is placed in a grain depot and has the risk of leakage of condensed water, and once leakage occurs, stored grains are affected with damp and deteriorate, so that potential safety grain storage hazards exist. The invention installs the equipment outside the bin, and even if condensed water leaks, the condensed water can not harm grains.
(3) The equipment is not required to be manually moved, the mobile equipment is abandoned for the first time, and a foundation is laid for realizing the automatic operation of the grain storage equipment.
(4) The system is efficient and energy-saving.
The system efficiency and energy saving can be discussed from the following two aspects:
a. and (5) recycling the circulating wind of the system. Because the system adopts return air circulation, the temperature range treated by the system is much smaller than that of the whole fresh air, and is about 7-20 ℃.
b. And the system sucks and presses out the two-way air supply of the formula. When the method is used for cooling the whole grain pile, the temperature at the bottom of the grain pile can be reduced to a set value by adopting the forced air supply, then the temperature is converted by the air valve, and the temperature at the surface of the grain pile is reduced to the set value by adopting the suction type air supply. The cooling time of the system is greatly shortened, and the energy consumption is saved.
(5) The system integrates multiple functions and has good low-temperature storage quality of grains.
a. The system combines the functions of cooling the whole cabin in the grain pile and controlling the temperature of the surface layer of the space in the cabin. Different air supply pipelines are adopted by the system, and various functions such as internal cooling and surface space temperature control of the grain stack can be realized through switching of air valves among the pipelines.
b. The grain has good low-temperature storage quality by various air supply modes.
The system can adopt an uplink air supply mode or a downlink air supply mode. So that the quality of grains stored in the granary can be kept in an optimal state.
Drawings
FIG. 1 is a schematic illustration of a method of cooling the interior of a pressed grain stack;
FIG. 2 is a schematic illustration of a method of cooling the interior of an aspirated grain pile;
FIG. 3 is a schematic illustration of a method of surface layer temperature control in a granary space;
FIG. 4 is a schematic diagram of a specific configuration of a cooling device;
the marks in the figure: 1. An in-bin return air valve; 2. an in-bin air supply valve; 3. a return air pipeline in the bin; 4. an in-bin air supply pipeline; 5. a cooling device; 6. a grain pile air path valve; 7. grain pile wind path pipeline; 8. a ground cage ventilation opening; 101. a refrigeration system; 102. an evaporation fan; 103. an air supply static pressure box; a1, a grain stacking line.
Detailed Description
For a further understanding of the invention, its features and advantages, reference should be made to the following examples which illustrate the structure of the invention and to the accompanying drawings.
Example 1: as shown in fig. 1 to 3, a multifunctional temperature and humidity control device for a granary comprises a cooling device 5 arranged outside the granary, wherein the granary is in air circuit connection with the cooling device 5 through a granary inner return air pipeline 3 and a granary inner air supply pipeline 4 which are arranged in an upper space of a granary wall; the grain stack air duct system also comprises a grain stack air duct pipeline 7, wherein the grain stack air duct pipeline 7 is connected to the bottom of the grain bin and connects the grain bin with the air passage of the cooling equipment 5; the inside of the in-bin return air pipeline 3 is provided with an in-bin return air valve 1, the inside of the in-bin air supply pipeline 4 is provided with an in-bin air supply valve 2, and the inside of the grain pile air path pipeline 7 is provided with a grain pile air path valve 6.
As shown in fig. 4, preferably, the cooling device 5 includes a refrigerating system 101, one end of the refrigerating system 101 is connected with a gas path of the in-bin return air duct 3, the other end of the refrigerating system is connected with a gas path of an air supply static pressure box 103, an evaporation fan 102 is further arranged between the air supply static pressure box 103 and the gas path of the refrigerating system 101, and the outside of the air supply static pressure box 103 is respectively connected with the in-bin air supply duct 4 and the grain stack air path duct 7.
An evaporator is further arranged in the refrigerating system 101, and the evaporator performs cooling and dehumidifying treatment on the gas.
In which, as a preference, the openings of the in-bin return air duct 3 and the in-bin air supply duct 4 in the bin wall are both arranged above the grain stacking line of the granary.
In particular, to ensure the uniformity and quality of return air and supply air, the following settings may be made: the ground of the bottom of the granary is provided with a ground cage ventilation device, and the ground cage ventilation device is connected with a grain pile air duct 7 through a ground cage ventilation opening 8 so as to connect the bottom of the granary with a cooling device 5 in an air way.
Preferably, the in-bin return air valve 1, the in-bin air supply valve 2 and the grain stack air path valve 6 can be valves with a filtering and dedusting function.
In particular, the cooling device 5 may be alternatively configured as an integral cooling structure or a split cooling structure.
As shown in fig. 1, the schematic diagram of the method for performing the forced cooling of grains in a grain bin by using the multifunctional temperature and humidity control device includes the following steps:
s1, closing an in-bin air supply valve 2, cutting off an air flow passage between the in-bin air supply valve 2 and cooling equipment 5, and opening an in-bin return air valve 1 and a grain stack air passage valve 6;
s2, air flow in the granary is filtered, and is sequentially transmitted to cooling equipment 5 through an in-granary return air valve 1 and an in-granary return air pipeline 3 to be cooled and dehumidified;
s3, the processed air flow is sent to the bottom of the grain pile through a grain pile air path valve 6, a grain pile air path pipeline 7 and an overground cage ventilation opening 8 in a grain depot to cool the interior of the grain pile.
As shown in fig. 2, the schematic diagram of the method for cooling the interior of the grain pile by sucking out grains in the grain bin by using the multifunctional temperature and humidity control device comprises the following steps:
s1, closing an in-bin return air valve 1, cutting off an air flow passage between the in-bin return air valve 1 and cooling equipment 5, and opening an in-bin air supply valve 2 and a grain stack air passage valve 6;
s2, air flow in the granary is filtered and sequentially transmitted to cooling equipment 5 through an overground cage ventilation opening 8, a grain pile air path valve 6 and a grain pile air path pipeline 7 in the granary for cooling and dehumidifying;
s3, the processed air flow passes through the in-bin air supply pipeline 4 and is sent to the top of the grain pile by the in-bin air supply valve 2 so as to cool the inside of the grain pile.
As shown in fig. 3, the schematic diagram of the method for performing surface layer temperature control on the granary space in the granary by using the multifunctional temperature and humidity control device comprises the following steps:
s1, closing a grain pile air path valve 6, cutting off an air flow path of an overground cage ventilation opening 8 and cooling equipment 5, and opening an in-bin air supply valve 2 and an in-bin return air valve 1;
s2, the air flow in the granary is filtered and sequentially passes through the in-granary return air valve 1, and the in-granary return air pipeline 3 is transmitted to the cooling equipment 5 for cooling and dehumidifying treatment;
s3, the processed air flow passes through an in-bin air supply pipeline 4 and is then sent into a granary space at the top of the grain pile by an in-bin air supply valve 2 to perform surface layer temperature control.
Example 2: as shown in fig. 1, 3 and 4, in order to implement a temperature adjustment control method by using a technical scheme of an optimally arranged cooling device 5, when the cooling device is adopted to cool a grain stack, an in-bin return air valve and a grain stack air path valve are opened, and an in-bin air supply valve is closed. The air in the barn is processed by a filter, cooled and dehumidified by an evaporator in a refrigerating system through an in-barn return air pipeline, and then the air reaches an air supply static pressure box, low-temperature air is sent into a grain pile air path pipeline by an evaporating fan, and is sent into the barn through an overground cage ventilation opening of a grain depot through a grain pile air path valve. The low-temperature air passes through the grain pile and enters the refrigeration equipment through a return air pipeline connected with the space in the top bin. Through such repeated cycles, the temperature of the grains in the warehouse is reduced to a set range.
When the cooling equipment is adopted to control the temperature of the surface layer of the space in the granary, the air supply valve in the granary and the return air valve in the granary are opened, the air path valve of the grain pile is closed, the return air in the granary is processed by the filter, and after the cooling and dehumidifying treatment is carried out by the evaporator in the refrigerating system through the return air pipeline in the granary, the air reaches the air supply static pressure box, and the low-temperature air is sent into the space in the granary through the air supply valve in the granary and the air supply pipeline in the granary by the evaporating fan, so that the surface temperature of the space in the granary and the grain pile is reduced. The low-temperature air after absorbing heat is changed into high-temperature air which enters the refrigeration equipment from the return air pipeline. The temperature and humidity of the space in the bin and the surface of the grain pile are controlled within a set range through a cycle process.
Claims (10)
1. The suction type grain pile cooling method uses a multifunctional temperature and humidity control device for a granary, wherein the multifunctional temperature and humidity control device for the granary comprises cooling equipment (5) arranged outside the granary and a ground cage ventilation device arranged at the bottom of the granary, and the granary is in air path connection with the cooling equipment (5) through a granary inner return air pipeline (3) and a granary inner air supply pipeline (4) which are arranged in the space above the granary wall; the grain stack air duct system also comprises a grain stack air duct pipeline (7), wherein the grain stack air duct pipeline (7) is connected to the bottom of the granary and connects the granary with a cooling device (5) in an air way; an in-bin return air valve (1) is arranged in the in-bin return air pipeline (3), an in-bin air supply valve (2) is arranged in the in-bin air supply pipeline (4), and a grain stack air path valve (6) is arranged in the grain stack air path pipeline (7); the cooling device (5) comprises a refrigerating system (101), one end of the refrigerating system (101) is connected with an air passage of an in-bin return air pipeline (3), the other end of the refrigerating system is connected with an air passage of an air supply static pressure box (103), an evaporation fan (102) is further arranged between the air passage of the air supply static pressure box (103) and the air passage of the refrigerating system (101), and the outer part of the air supply static pressure box (103) is respectively connected with an air passage of an in-bin air supply pipeline (4) and an air passage pipeline (7) of the grain stack; an evaporator is further arranged in the refrigerating system (101) and is used for cooling and dehumidifying the gas; the ground cage ventilation device is connected with a grain pile air duct pipeline (7) through a ground cage ventilation opening (8) so as to connect the bottom of the granary with a cooling device (5) in an air way, and is characterized in that: comprises the steps of,
s1, closing an in-bin return air valve (1), cutting off an air flow passage between the in-bin return air valve (1) and cooling equipment (5), and opening an in-bin air supply valve (2) and a grain stack air passage valve (6);
s2, air flow in the granary is filtered and sequentially transmitted to cooling equipment (5) through an overground cage ventilation opening (8), a grain pile air path valve (6) and a grain pile air path pipeline (7) in the granary for cooling and dehumidifying treatment;
s3, the processed air flow passes through an in-bin air supply pipeline (4) and is sent to the top of the grain pile by an in-bin air supply valve (2) so as to cool the interior of the grain pile.
2. The aspiration type grain pile cooling method of claim 1, wherein: openings of the in-bin return air pipeline (3) and the in-bin air supply pipeline (4) in the bin wall are arranged above the grain stacking line of the granary.
3. The aspiration type grain pile cooling method of claim 1, wherein: the in-bin return air valve (1), the in-bin air supply valve (2) and the grain stack air path valve (6) are all filtering dust removal valves.
4. The aspiration type grain pile cooling method of claim 1, wherein: the cooling device (5) is of an integral cooling structure or a split cooling structure.
5. The multifunctional temperature and humidity control device for the granary comprises cooling equipment (5) arranged outside the granary and a ground cage ventilation device arranged at the bottom of the granary, wherein the granary is in air circuit connection with the cooling equipment (5) through a granary inner return air pipeline (3) and a granary inner air supply pipeline (4) which are arranged in an upper space of a granary wall; the grain stack air duct system also comprises a grain stack air duct pipeline (7), wherein the grain stack air duct pipeline (7) is connected to the bottom of the granary and connects the granary with a cooling device (5) in an air way; an in-bin return air valve (1) is arranged in the in-bin return air pipeline (3), an in-bin air supply valve (2) is arranged in the in-bin air supply pipeline (4), and a grain stack air path valve (6) is arranged in the grain stack air path pipeline (7); the cooling device (5) comprises a refrigerating system (101), one end of the refrigerating system (101) is connected with an air passage of an in-bin return air pipeline (3), the other end of the refrigerating system is connected with an air passage of an air supply static pressure box (103), an evaporation fan (102) is further arranged between the air passage of the air supply static pressure box (103) and the air passage of the refrigerating system (101), and the outer part of the air supply static pressure box (103) is respectively connected with an air passage of an in-bin air supply pipeline (4) and an air passage pipeline (7) of the grain stack; an evaporator is further arranged in the refrigerating system (101) and is used for cooling and dehumidifying the gas; the ground cage ventilation device is connected with a grain pile air duct pipeline (7) through a ground cage ventilation opening (8) so as to connect the bottom of the granary with a cooling device (5) in an air way, and is characterized in that: comprises the steps of,
s1, closing an in-bin air supply valve (2), cutting off an air flow passage between the in-bin air supply valve (2) and cooling equipment (5), and opening an in-bin return air valve (1) and a grain stack air passage valve (6);
s2, air flow in the granary is filtered, and is sequentially transmitted to cooling equipment (5) through an in-granary return air valve (1) and an in-granary return air pipeline (3) to be cooled and dehumidified;
s3, the processed air flow is sent to the bottom of the grain pile through a grain pile air path valve (6), a grain pile air path pipeline (7) and an overground cage ventilation opening (8) in a grain depot to cool the interior of the grain pile.
6. The method for cooling a pressed grain pile according to claim 5, wherein: openings of the in-bin return air pipeline (3) and the in-bin air supply pipeline (4) in the bin wall are arranged above the grain stacking line of the granary.
7. The method for cooling a pressed grain pile according to claim 5, wherein: the in-bin return air valve (1), the in-bin air supply valve (2) and the grain stack air path valve (6) are all filtering dust removal valves.
8. The method for cooling a pressed grain pile according to claim 5, wherein: the cooling device (5) is of an integral cooling structure or a split cooling structure.
9. The granary space temperature control method uses a multifunctional temperature and humidity control device for a granary, wherein the multifunctional temperature and humidity control device for the granary comprises cooling equipment (5) arranged outside the granary and a ground cage ventilation device arranged at the bottom of the granary, and the granary is in air path connection with the cooling equipment (5) through a granary inner return air pipeline (3) and a granary inner air supply pipeline (4) which are arranged in the space above the granary wall; the grain stack air duct system also comprises a grain stack air duct pipeline (7), wherein the grain stack air duct pipeline (7) is connected to the bottom of the granary and connects the granary with a cooling device (5) in an air way; an in-bin return air valve (1) is arranged in the in-bin return air pipeline (3), an in-bin air supply valve (2) is arranged in the in-bin air supply pipeline (4), and a grain stack air path valve (6) is arranged in the grain stack air path pipeline (7); the cooling device (5) comprises a refrigerating system (101), one end of the refrigerating system (101) is connected with an air passage of an in-bin return air pipeline (3), the other end of the refrigerating system is connected with an air passage of an air supply static pressure box (103), an evaporation fan (102) is further arranged between the air passage of the air supply static pressure box (103) and the air passage of the refrigerating system (101), and the outer part of the air supply static pressure box (103) is respectively connected with an air passage of an in-bin air supply pipeline (4) and an air passage pipeline (7) of the grain stack; an evaporator is further arranged in the refrigerating system (101) and is used for cooling and dehumidifying the gas; the ground cage ventilation device is connected with a grain pile air duct pipeline (7) through a ground cage ventilation opening (8) so as to connect the bottom of the granary with a cooling device (5) in an air way, and is characterized in that: comprises the steps of,
s1, closing a grain pile air path valve (6) to cut off an air flow path of an overground cage ventilation opening (8) and cooling equipment (5), and opening an in-bin air supply valve (2) and an in-bin return air valve (1);
s2, the air flow in the granary is filtered and sequentially passes through an in-granary return air valve (1), and an in-granary return air pipeline (3) is transmitted to cooling equipment (5) for cooling and dehumidifying treatment;
s3, the processed air flow passes through an in-bin air supply pipeline (4) and is then sent into a granary space at the top of the grain pile by an in-bin air supply valve (2) to perform surface layer temperature control.
10. The granary space temperature control method of claim 9, wherein: openings of the in-bin return air pipeline (3) and the in-bin air supply pipeline (4) in the bin wall are arranged above the grain stacking line of the granary.
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| CN109511387A (en) * | 2019-01-03 | 2019-03-26 | 凌建军 | A kind of grain mold proof method and grain mold proof machine and the silo with grain mold proof machine |
| CN110671868A (en) * | 2019-10-26 | 2020-01-10 | 中央储备粮镇江直属库有限公司 | Intelligent temperature control grain storage system |
| CN114489194A (en) * | 2021-12-30 | 2022-05-13 | 宁夏法福来食品股份有限公司 | Grain condition measurement and control system for grain storage |
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