CN209930978U - Seepage ventilation temperature control system for large-diameter vertical silo - Google Patents
Seepage ventilation temperature control system for large-diameter vertical silo Download PDFInfo
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- CN209930978U CN209930978U CN201920582450.4U CN201920582450U CN209930978U CN 209930978 U CN209930978 U CN 209930978U CN 201920582450 U CN201920582450 U CN 201920582450U CN 209930978 U CN209930978 U CN 209930978U
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- temperature control
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Abstract
The utility model discloses a seepage ventilation temperature control system for a large-diameter vertical silo, which comprises an annular air pipe arranged at the upper part of a silo body and communicated with a fan and a ground cage arranged at the bottom of the silo body, wherein the ground cage is communicated with the fan through an air distribution box; the pipe wall of the annular air pipe is made of flame-retardant polyester fabric cloth; the ground cage is a multi-section combined annular structure with different opening rates. The utility model discloses utilize light "fabric tuber pipe" and special design's metal ground cage of low price relatively, realize upper portion tuber pipe seepage flow air supply, the annular trompil ratio wind channel adherence return air that becomes in bottom, carry out the pertinence local aeration cooling to grain heap "hot skin" region, the air current tissue form that forms upper portion seepage flow-adherence backward flow in the grain heap has been ensured, make cold air only flow through "hot skin" region, afterwards, the air current that the temperature risees the humidity and increases is discharged through exhaust device from the granary bottom, can not cause the dewfall phenomenon in "cold core" region, green has been realized, energy-conservation, store up the grain safely.
Description
Technical Field
The utility model relates to a ventilation cooling of major diameter storage storehouse especially relates to a major diameter vertical silo seepage flow ventilation temperature control system.
Background
In the process of storing grains for more than one year, after the grains are put into a warehouse in autumn and winter, the mechanical ventilation is used for cooling the grain pile at night, so that the grains can safely live through the winter at a lower temperature (15-20 ℃); however, in spring and summer, the grain pile is heated under the influence of the rise of the external environment temperature, external heat is transferred from the surface layer of the grain pile to the inside of the grain pile through the enclosure structure, and the grain pile has the phenomenon of 'hot skin and cold core' because the grain does not have good heat conduction performance. Although various ventilation systems in different forms are adopted in the granary at the present stage, the technical essence of the granary is that the whole granary is ventilated, and the temperature rise of a hot skin area is difficult to be controlled effectively in a targeted manner.
The current technical scheme for controlling the heating of the high and large horizontal warehouse mainly comprises the following steps: (1) ground cages are uniformly laid on the ground of the granary, cold air is fed in through mechanical circulation, and meanwhile, an exhaust fan is arranged on the wall surface of the granary above the grain surface to cool the grain pile. (2) An air supply device (usually in a nozzle form) is arranged on the wall surface of the upper part of the barn, and air return is carried out through a ground cage or a trench uniformly laid on the lower part of the granary.
The technical scheme for controlling the heating of the silo and the squat silo mainly comprises the following steps: (1) a layer of annular ventilation pipe is arranged on the wall surface of a granary (generally below the grain surface and above the grain stack), and an air return/exhaust fan is arranged above the grain surface. (2) The grain pile is internally provided with two or three layers of annular air pipes, and adopts upper/lower air supply and lower/upper air return (or air exhaust).
Although the method adopted by the prior art can also solve the phenomenon of 'hot skin' of the grain pile, the implementation mode of the method belongs to ventilation of the whole bin.
Because the prior art controls the phenomenon of 'hot skin and cold core' of the grain pile by adopting ventilation and cooling of the whole bin, the configuration mode of the system ensures that the airflow organization uniformly passes through the whole grain pile as much as possible, and the 'hot skin' area which is heated and needs cooling and the 'cold core' area which is still in a low-temperature (or quasi-low-temperature) state and does not need ventilation and cooling can not be distinguished. At this moment, after cold airflow sent by the mechanical air supply passes through a hot skin area, the temperature can be obviously increased, the humidity is rapidly increased, and the wet hot airflow is easy to generate dewing when meeting a cold core low-temperature area in grain stacking, so that the grain is mildewed, and the grain storage safety is endangered. This phenomenon is particularly prominent in silos and squash silos.
The 'hot skin' area of the grain stack occupies a small proportion relative to the whole stack volume, and the whole stack ventilation can cause huge energy waste, in the horizontal warehouse, the thickness of the 'hot skin' is within 0.3-0.5m from the cornice wall, and the thickness of the vertical silo and the shallow round silo is within 0.5m from the silo wall, the single silo building area of the grain horizontal warehouse in China is more 60 multiplied by 24m, the diameter of the silo and the shallow round silo is more within 24m, the large-diameter vertical silo is a new silo type which appears in recent years, and the diameter of the large-diameter vertical silo can reach more than 30m ~ 45 m.
Disclosure of Invention
An object of the utility model is to provide a major diameter vertical silo seepage flow ventilation temperature control system to warehouse plane diameter reaches 30m has both solved the problem that grain heap outside high temperature has also reduced the energy consumption that whole storehouse ventilates, provides reliable guarantee for realizing energy-conservation, safe grain storage.
In order to achieve the above purpose, the utility model can adopt the following technical proposal:
the seepage ventilation temperature control system of the large-diameter vertical silo comprises an annular air pipe which is arranged at the upper part of a silo body and communicated with a fan and a ground cage which is arranged at the bottom of the silo body, wherein the ground cage is communicated with the fan through an air distribution box; the pipe wall of the annular air pipe is made of flame-retardant polyester fabric cloth; the ground cage is a multi-section combined annular structure with different opening rates.
The annular air pipe is arranged 50cm-60cm higher than the top of the grain pile, and the horizontal projection of the axis of the annular air pipe is positioned at the position 4/5 of the radius of the vertical silo.
The circular symmetrical positions of the annular air pipes are respectively connected with a three-way valve, and the other two ports of the three-way valve are arranged outside the bin wall of the vertical silo and are respectively communicated with an air outlet pipeline of an air cooler and an air blower.
The diameters of the annular air pipe and the three-way valve are both 40 cm.
The cross section of the ground cage is of a sector structure with a central angle of 90 degrees, and the arc-shaped surface facing the inner silo wall of the vertical silo is a perforated surface.
The air duct joints which extend out of the bin wall and are provided with valves are respectively connected to the positions of the circumferential symmetry of the ground cage, and the air duct joints are communicated with an exhaust fan pipeline.
Holes on the ground cage opening surface close to the air duct joint are sparse, and the holes are gradually dense along with the distance.
The size of the hole is 5mm multiplied by 20mm, and the punching height is 0.5 mm.
The utility model discloses utilize the light "fabric tuber pipe" of the price relative cheapness and the metal ground cage of special design, realize upper portion tuber pipe seepage flow air supply, the annular aperture ratio wind channel adherence return air that becomes in bottom goes on the air return of adherence, carry out the pertinence local aeration cooling to the grain heap "hot skin" region, guaranteed to form the air current tissue form of upper portion seepage flow-adherence backward flow in the grain heap, make cold air only flow through "hot skin" region, later, the air current that the temperature rose humidity increases is discharged through exhaust apparatus from the granary bottom, can not cause the dewfall phenomenon in "cold core" region, realized green, energy-conserving, safe grain storage; meanwhile, the temperature of the grains in the whole warehouse is stabilized by inhibiting the temperature rise of a hot skin area of the grain stack, the cooling and ventilation object is only the grains in the hot skin area and does not contain a cold core area, the cold core area in the grain stack still keeps the lower temperature when the grains are put into the warehouse and is not damaged by the ventilation of the whole warehouse, the problem that the temperature outside the grain stack is overhigh is solved pertinently, compared with the existing cooling and ventilation mode for cooling the whole warehouse, the required cold quantity is obviously reduced, so the operation energy consumption is low, and the operation cost is greatly reduced; because the utility model discloses a ground cage of more conventional structure is less, has practiced thrift the metal quantity, and the on-the-spot installation of being convenient for, and the cost in fabric wind channel is lower, easily obtains, washs and changes, has not only reduced the initial investment, and later maintenance expense is also lower.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a block diagram of the ground cage of fig. 1.
Fig. 3 is a section of the ground cage of fig. 2 with 20% open area.
Fig. 4 is a section of the ground cage of fig. 2 at 30% open area.
Detailed Description
The following describes in detail the ventilation and temperature control system for a vertical silo having a 30m diameter in the plane of the silo, with reference to the accompanying drawings, so as to facilitate understanding by those skilled in the art.
As shown in figure 1, ventilation temperature control system including set up in the annular tuber pipe 1 that is linked together with the fan on silo 101 upper portion and set up in the ground cage 2 of silo bottom immediately, ground cage 2 is linked together through air distribution box and fan, the utility model discloses a pipe wall of annular tuber pipe 1 adopts 100% permanent fire-retardant dacron fabric cloth, forms the fabric tuber pipe, and the fabric tuber pipe adopts light material, has the filth to adhere to in the operation process, easily dismantles the washing, and later stage replacement cost is low, and its air supply relies on the seepage flow that the inside and outside pressure differential of tuber pipe produced, does not have obvious interference to grain face upper air flow field, is convenient for realize the control to the regional ventilation air current of "hot skin" in the grain heap by bottom special ground cage, can effectively organize the air supply to local region. When the vertical silo is installed, the supports are uniformly distributed on the position 50cm-60cm higher than the top of the grain pile on the wall of the vertical silo 101 along the circumferential direction, the fabric air pipe 1 is fixed on the supports by adopting a steel wire rope, and the horizontal projection of the axis of the installed fabric air pipe 1 is positioned at the position 4/5 of the radius of the vertical silo; the fabric air pipe is connected with a three-way valve 3 at the circumferential symmetrical position respectively, the other two ports (an air cooler port 4 and an air blower port 5) of the three-way valve 3 are arranged outside the bin wall of the vertical silo 101 and are respectively communicated with the pipelines of an external air cooler and an air blower (the pipelines are tightly connected by adopting a tightening belt, so that the firmness and the tightness of the pipelines are ensured), and air is uniformly supplied into the bin from two sides during operation; according to the area of the silo 101, the utility model selects and adopts FZ-18Y type air cooler and C6-48 No. 10C air blower, and the diameters of the annular air pipe 1 and the three-way valve 3 are 40 cm.
The utility model discloses a ground cage 2 adopts 36 segmentation combination formula ring structure that the percent opening is different, as shown in fig. 2, the cross section of ground cage 2 is central angle 90 °, radius 0.6M's fan-shaped structure, and every section ground cage circumference length is 2.5-2.7M, withholds through ground cage and adds bolt (M5 × 10) fixed connection.
The hole opening surface 2.1 of the ground cage is an arc surface, the hole opening surface 2.1 faces the inner wall of the vertical silo, the circumferential symmetrical positions of the ground cage are respectively connected with air duct joints 2.2 which extend out of the silo wall and are provided with valves, and the air duct joints 2.2 are communicated with the pipeline of an exhaust fan; from the positions of the two sides connected with the air duct joints, six sections of ground cage segments with the opening rate of P1 (P1 = 20%) are adopted (as shown in figure 3), then three sections of ground cage segments with the opening rate of P2 (P2 = 30%) are adopted (as shown in figure 4), the opening rate of the ground cage is determined through experiments and theoretical calculation by taking effective control of temperature rise of a 'hot skin' area as a target.
The whole annular ground cage that finishes of installation is close to the hole 2.3 that wind channel connects 2.2 positions comparatively sparsely, and hole 2.3 is intensive gradually along with the distance becomes far away, and the air quantity difference that each section ground cage caused because of the resistance loss difference in the air supply process can be eliminated in the change of this kind of trompil area, realizes the even air supply to "hot skin" region, makes outer grain heap form stable "heat shield" effect to the inside.
The ground cage 2 is made of GB716-91 cold-rolled sheet and is subjected to hot galvanizing corrosion prevention treatment, the thickness of the ground cage is 2mm, the size of the hole 2.3 is 5mm multiplied by 20mm (rectangular hole), the ground cage is integrally formed by a punching machine, and the punching height is 0.5 mm. The ground cage is fixed at the bottom of the bin through a bolt component with the specification of M10 multiplied by 30, and the air duct joints 2.2 at the two sides are connected with an exhaust fan through an air distribution box. When the air exhaust fan is installed, the air exhaust fan is symmetrically arranged, and the horizontal projection position connecting line of the air exhaust fan is overlapped with or perpendicular to the horizontal projection position connecting line of the fabric air duct air cooler. The utility model discloses used fan parameter and quantity are verified and are confirmed by theoretical calculation cooperation experiment.
The utility model discloses a working method divide into two kinds:
(1) when the outside air temperature is 15-23 ℃, the blower and the exhaust fan are opened, simultaneously, the valves of the blower connectors 5 at the two sides of the fabric air pipe and the valves on the air duct connectors 2.2 at the two sides of the ground cage are opened, the annular air pipe 1 (the fabric air pipe) introduces the cold energy in the outside environment, and the 'hot skin' area of the grain pile is cooled to ensure that the grain pile is in a low-temperature state;
(2) when the outside air temperature is above 23 ℃, the air cooler and the exhaust fan are opened, the valves on the air cooler connectors 4 on the two sides of the fabric air pipe and the valves on the air duct connectors 2.2 on the two sides of the ground cage are opened simultaneously, the temperature rise of the hot skin area of the grain stack is controlled by adopting artificial refrigeration, the heat insulation of the cold core area is realized by cooling the hot skin area, and the cold core state of the grain stack is not damaged.
Claims (8)
1. A seepage ventilation temperature control system for a large-diameter vertical silo comprises an annular air pipe arranged at the upper part of a silo body and communicated with a fan and a ground cage arranged at the bottom of the silo body, wherein the ground cage is communicated with the fan through an air distribution box; the method is characterized in that: the pipe wall of the annular air pipe is made of flame-retardant polyester fabric cloth; the ground cage is a multi-section combined annular structure with different opening rates.
2. The seepage ventilation temperature control system for the large-diameter vertical silo according to claim 1, which is characterized in that: the annular air pipe is arranged 50cm-60cm higher than the top of the grain pile, and the horizontal projection of the axis of the annular air pipe is positioned at the position 4/5 of the radius of the vertical silo.
3. The seepage ventilation temperature control system for the large-diameter vertical silo according to claim 1, which is characterized in that: the circular symmetrical positions of the annular air pipes are respectively connected with a three-way valve, and the other two ports of the three-way valve are arranged outside the bin wall of the vertical silo and are respectively communicated with an air outlet pipeline of an air cooler and an air blower.
4. The seepage ventilation temperature control system for the large-diameter vertical silo according to claim 3, wherein the seepage ventilation temperature control system comprises: the diameters of the annular air pipe and the three-way valve are both 40 cm.
5. The seepage ventilation temperature control system for the large-diameter vertical silo according to claim 1, which is characterized in that: the cross section of the ground cage is of a sector structure with a central angle of 90 degrees, and the arc-shaped surface facing the inner silo wall of the vertical silo is a perforated surface.
6. The seepage ventilation temperature control system for the large-diameter vertical silo according to claim 1, which is characterized in that: the air duct joints which extend out of the bin wall and are provided with valves are respectively connected to the positions of the circumferential symmetry of the ground cage, and the air duct joints are communicated with an exhaust fan pipeline.
7. The seepage ventilation temperature control system for the large-diameter vertical silo according to claim 6, wherein the seepage ventilation temperature control system comprises: holes on the ground cage opening surface close to the air duct joint are sparse, and the holes are gradually dense along with the distance.
8. The seepage ventilation temperature control system for the large-diameter vertical silo according to claim 7, which is characterized in that: the size of the hole is 5mm multiplied by 20mm, and the punching height is 0.5 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920582450.4U CN209930978U (en) | 2019-04-26 | 2019-04-26 | Seepage ventilation temperature control system for large-diameter vertical silo |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920582450.4U CN209930978U (en) | 2019-04-26 | 2019-04-26 | Seepage ventilation temperature control system for large-diameter vertical silo |
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| Publication Number | Publication Date |
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| CN209930978U true CN209930978U (en) | 2020-01-14 |
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|---|---|---|---|
| CN201920582450.4U Expired - Fee Related CN209930978U (en) | 2019-04-26 | 2019-04-26 | Seepage ventilation temperature control system for large-diameter vertical silo |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109937717A (en) * | 2019-04-26 | 2019-06-28 | 河南工业大学 | Major diameter vertical silo seepage flow ventilation temperature-controlling system |
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2019
- 2019-04-26 CN CN201920582450.4U patent/CN209930978U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109937717A (en) * | 2019-04-26 | 2019-06-28 | 河南工业大学 | Major diameter vertical silo seepage flow ventilation temperature-controlling system |
| CN109937717B (en) * | 2019-04-26 | 2024-02-06 | 河南工业大学 | Seepage air temperature control system for large-diameter vertical silo |
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