Novel micro-positive pressure circulating controlled atmosphere grain storage technology

Abstract

The invention discloses a novel micro-positive pressure circulating controlled atmosphere grain storage process which comprises a large nitrogen making machine, a small nitrogen making machine, a pressure reducing valve, a pressure sensing transmitter, a pressure sensing receiver, a nitrogen concentration sensing transmitter, a nitrogen concentration sensing receiver, a dehumidification device, a cooling device, a warehouse, a warehouse air inlet, a warehouse air outlet, a pipeline and grains. Nitrogen and other green controlled atmosphere storage is carried out on grains at present. Due to the fact that the air tightness of a warehouse is difficult to be completely closed, external air easily enters the warehouse to dilute the concentration of nitrogen and the like in the warehouse, the concentration of the nitrogen and the like is difficult to maintain, and the controlled atmosphere insecticidal effect of the nitrogen and the like is affected. By continuously and circularly supplementing air into the granary, the nitrogen pressure in the granary is slightly higher than the atmospheric pressure, external air is prevented from entering the granary, the nitrogen concentration in the granary is effectively guaranteed, the nitrogen modified atmosphere insecticidal effect is improved, the humidity and temperature adjusting function is achieved, the grain storage safety is improved, and the granary is convenient to operate and environmentally friendly.

Description

Technical Field

[0001] The invention relates to the field of grain storage, and in particular to a new micro-positive pressure circulating gas-controlled grain storage process. Background Art

[0002] Grain storage is related to national food security. Now the greener grain storage is nitrogen, carbon dioxide and other gas-controlled storage. In the current nitrogen gas-controlled grain storage process, the nitrogen produced by the nitrogen generator is used to replace the air in the grain pile. When the concentration drops, the gas is replenished to maintain the nitrogen concentration for a certain period of time to achieve the purpose of killing pests. Since the air tightness of the warehouse is difficult to be completely airtight, especially the silo, the gas-controlled grain storage has no airbags, and it is easy for outside air to enter the warehouse, diluting the nitrogen concentration in the warehouse, resulting in a decrease in the nitrogen concentration, making it difficult to maintain the effective concentration, and affecting the insecticidal effect of nitrogen gas-controlled grain storage. In order to maintain or increase the nitrogen concentration in the gas-controlled grain storage, a new micro-positive pressure circulation gas-controlled grain storage process is proposed. By continuously replenishing a small amount of gas in the warehouse, it is ensured that the nitrogen pressure in the warehouse is slightly higher than the atmospheric pressure, preventing the outside air from entering the warehouse, effectively ensuring the nitrogen concentration in the warehouse, and improving the insecticidal effect of nitrogen gas-controlled grain storage. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a new micro-positive pressure circulating gas-controlled grain storage process, which ensures that the nitrogen pressure in the warehouse is slightly higher than the atmospheric pressure, prevents the outside air from entering the warehouse, and maintains or increases the nitrogen concentration by circulating nitrogen to achieve the purpose of improving the insecticidal effect of nitrogen gas-controlled gas.

[0004] A new micro-positive pressure circulating gas-conditioned grain storage process according to an embodiment of the present invention includes: a large nitrogen generator, a small nitrogen generator, a pressure reducing valve, a pressure sensor transmitter, a pressure sensor receiver, a nitrogen concentration sensor transmitter, a nitrogen concentration sensor receiver, a dehumidification device, and a cooling device. The implementation involves a warehouse, a warehouse air inlet, a warehouse air outlet, a pipeline, and grain. First, use the nitrogen produced by the large nitrogen generator to replace the air in the grain pile. When the nitrogen concentration in the warehouse reaches 98% or the set concentration, use the small nitrogen generator to circulate nitrogen in the warehouse for a long time or intermittently to maintain or increase the nitrogen concentration in the warehouse. The gas required for nitrogen in the small nitrogen generator is provided by the gas in the warehouse and the outside air from the warehouse outlet. The nitrogen pressure output is controlled by the pressure reducing valve, pressure sensor transmitter, and pressure sensor receiver. Nitrogen enters the warehouse through the warehouse air inlet to control and maintain the grain pile space in the warehouse in a slightly positive pressure state, preventing the outside air from entering the warehouse, maintaining or increasing the nitrogen concentration in the warehouse, effectively ensuring the nitrogen concentration in the warehouse, and improving the nitrogen gas conditioning insecticide effect. The pressure sensor transmitter, pressure sensor receiver, nitrogen concentration sensor transmitter, and nitrogen concentration sensor receiver are used to control whether the small nitrogen generator is working and whether nitrogen is being transported. The temperature and humidity of the gas are regulated by the dehumidifier and the cooling device. The small nitrogen generator, dehumidifier, and cooling device can be operated independently and turned on as needed.

[0005] A new micro-positive pressure circulating gas-controlled grain storage process according to an embodiment of the present invention has at least the following technical effects: a small nitrogen generator is used to continuously circulate nitrogen to the space in the warehouse, and the nitrogen delivery pressure is controlled to ensure that the nitrogen pressure in the warehouse is slightly higher than the atmospheric pressure, thereby preventing outside air from entering the warehouse. By continuously circulating nitrogen, the nitrogen concentration in the warehouse is effectively maintained or increased, ensuring that the effective nitrogen concentration is maintained in the warehouse, and improving the insecticidal effect of nitrogen gas conditioning. The dehumidification device and the cooling device regulate the temperature and humidity of the gas to improve the safety of grain storage.

[0006] According to some embodiments of the present invention, the small nitrogen generator has two nitrogen production modes: one is circulating nitrogen production, in which the gas required for the small nitrogen generator is provided by the gas in the warehouse and the outside air coming out of the warehouse air outlet; the other is direct nitrogen production, in which the gas required for the small nitrogen generator is directly provided by the outside air. Large nitrogen generators and small nitrogen generators can select suitable nitrogen production modes according to needs.

[0007] According to some embodiments of the present invention, the dehumidification device, such as a dehumidifier, is configured as needed and connected to an air outlet duct or an air inlet duct, and the dehumidification capacity is configured as needed to meet airtight requirements.

[0008] According to some embodiments of the present invention, the cooling device, such as air conditioning refrigeration equipment, is configured as needed and connected to the air outlet duct or the air inlet duct. The cooling capacity is configured as needed to meet the airtightness requirements.

[0009] According to some embodiments of the present invention, the pressure sensor transmitter can detect the pressure value in the warehouse, can transmit the detected data, and has a remote data transmission function.

[0010] According to some embodiments of the present invention, the pressure sensor receiver can receive information from the pressure sensor transmitter, and can also set the working pressure range, connect to the small nitrogen generator, and control the operation of the small nitrogen generator according to the set value.

[0011] According to some embodiments of the present invention, the small nitrogen generator has a model and output selected according to demand and has a remote control system.

[0012] According to some embodiments of the present invention, the warehouse air outlet has a pressure valve that can control whether to discharge air according to the pressure conditions. The gas coming out of the warehouse air outlet is input into a small nitrogen generator or directly discharged into the air.

[0013] According to some embodiments of the present invention, the nitrogen is one of the gas controlled atmosphere grain storage methods, and can be applied to other gas controlled atmosphere grain storage methods. The gas required for gas controlled atmosphere grain storage is machine-made or directly provided.

[0014] According to some embodiments of the present invention, the cycle can be used as needed, and if not needed, it can be performed directly by gas supplementation.

[0015] In some embodiments of the present invention, the pipe may be made as an insulated pipe.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0018] Figure 1 is a schematic diagram of the installation structure of an embodiment of the present invention;

[0019] Reference numerals:

[0020] Large nitrogen generator 100, small nitrogen generator 200, pressure reducing valve 300, pressure sensor transmitter 410, pressure sensor receiver 420, nitrogen concentration sensor transmitter 510, nitrogen concentration sensor receiver 520;

[0021] Dehumidification device 600;

[0022] Cooling device 700;

[0023] Warehouse 800, warehouse air inlet 810, warehouse air outlet 820, and pipeline 830;

[0024] Food 900. DETAILED DESCRIPTION

[0025] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0026] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] Reference Figure 1 A new micro-positive pressure circulating gas-controlled grain storage process according to an embodiment of the present invention includes a large nitrogen generator 100, a small nitrogen generator 200, a pressure reducing valve 300, a pressure sensor transmitter 410, a pressure sensor receiver 420, a nitrogen concentration sensor transmitter 510, a nitrogen concentration sensor receiver 520, a dehumidification device 600, and a cooling device 700. During implementation, a warehouse 800, a warehouse air inlet 810, a warehouse air outlet 820, a pipeline 830, and grain 900 are involved.

[0029] A new micro-positive pressure circulation gas-controlled grain storage process according to an embodiment of the present invention has at least the following technical effects:

[0030] First, the nitrogen produced by the large nitrogen generator 100 is used to replace the air between the grains 900 and the space inside the warehouse 800. When the nitrogen concentration inside the warehouse 800 reaches 98% or the set concentration, the small nitrogen generator 200 is used to circulate nitrogen inside the warehouse 800 for a long time or intermittently. After passing through the pressure reducing valve 300, the pressure sensor transmitter 410, and the pressure sensor receiver 420, the pressure sensor transmitter 410 senses the pressure inside the warehouse 800 and issues a command, and the pressure sensor receiver 420 receives the pressure. Instruction, according to the pressure instruction, control whether the small nitrogen generator 200 produces nitrogen. The produced nitrogen is transported to the interior of the warehouse 800 after being decompressed by the pressure reducing valve 300. Through pressure control, the grain 900 space is controlled to be in a slightly positive pressure state to prevent external air from entering the warehouse 800. The small nitrogen generator 200 performs long-term or intermittent circulation of nitrogen filling inside the warehouse 800, thereby achieving the purpose of maintaining or increasing the nitrogen concentration, ensuring that the effective nitrogen concentration is maintained in the warehouse, and improving the nitrogen gas conditioning insecticide effect. The pressure sensor transmitter 410, the pressure sensor receiver 420, the nitrogen concentration sensor transmitter 510, and the nitrogen concentration sensor receiver 520 control whether the small nitrogen generator 200 is working and whether nitrogen is transported. The dehumidifier 600 and the cooling device 700 are installed on the circulation pipeline to adjust the temperature and humidity of the gas to improve the safety of grain storage. The small nitrogen generator 200, the dehumidifier 600, and the cooling device 700 can be operated independently and opened as needed.

[0031] According to some embodiments of the present invention, the small nitrogen generator 200 has two nitrogen making methods: one is circulating nitrogen making, in which the gas required for the small nitrogen generator 200 to make nitrogen comes out of the warehouse air outlet 820 and is provided by the gas in the warehouse and the outside air, so that the relatively high concentration of nitrogen in the warehouse is fully utilized to reduce the energy consumption of the small nitrogen generator 200 to make nitrogen; the other is direct nitrogen making, in which the gas required for the small nitrogen generator 200 to make nitrogen is directly provided by the outside air. The large nitrogen generator 100 and the small nitrogen generator 200 select suitable nitrogen making methods according to the needs.

[0032] According to some embodiments of the present invention, the dehumidification device 600, such as a dehumidifier, is configured as needed and connected to the pipeline 830. The dehumidification capacity is configured as needed to meet the airtightness requirements.

[0033] According to some embodiments of the present invention, the cooling device 700, such as an air conditioning refrigeration device, is configured as needed and connected to the pipeline 830. The cooling capacity is configured as needed to meet the airtightness requirements.

[0034] According to some embodiments of the present invention, the pressure sensor transmitter 400 can detect the pressure value in the chamber, transmit the detected data, and has a remote data transmission function.

[0035] According to some embodiments of the present invention, the pressure sensor receiver 500 can receive information from the pressure sensor transmitter 400, and can also set the working pressure range, connect to the small nitrogen generator 200, and control the operation of the small nitrogen generator 200 according to the set value.

[0036] According to some embodiments of the present invention, the small nitrogen generator 200 can select the model and output according to the demand, and has a remote control system. Wheels can be added to make it mobile, and it can be moved by a forklift without adding wheels.

[0037] According to some embodiments of the present invention, the warehouse air outlet 820 has a pressure valve that can control whether to discharge air according to the pressure conditions. The gas coming out of the warehouse air outlet 820 is input into the small nitrogen generator 200 or directly discharged into the air.

[0038] According to some embodiments of the present invention, the nitrogen is one of the gas controlled atmosphere grain storage methods, and can be applied to other gas controlled atmosphere grain storage methods, such as carbon dioxide and other gases. The gas required for gas controlled atmosphere grain storage is machine-made or directly provided.

[0039] According to some embodiments of the present invention, the cycle can be used as needed, and if not needed, it can be performed directly by gas supplementation.

[0040] In some embodiments of the present invention, the pipe may be made as an insulated pipe.

[0041] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0042] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A new process for slightly positive pressure circulating gas-controlled grain storage, characterized in that include: A large nitrogen generator 100, a small nitrogen generator 200, a pressure reducing valve 300, a pressure sensor transmitter 410, a pressure sensor receiver 420, a nitrogen concentration sensor transmitter 510, a nitrogen concentration sensor receiver 520, a dehumidification device 600, and a cooling device 700 are involved in the implementation. A warehouse 800, a warehouse air inlet 810, a warehouse air outlet 820, a pipeline 830, and grain 900 are involved. First, the nitrogen produced by the large nitrogen generator 100 is used to replace the air between the grains 900 and the space inside the warehouse 800. When the nitrogen concentration inside the warehouse 800 reaches 98% or the set concentration, the small nitrogen generator 200 is used to circulate nitrogen inside the warehouse 800 for a long time or intermittently. After passing through the pressure reducing valve 300, the pressure sensor transmitter 410, and the pressure sensor receiver 420, the pressure sensor transmitter 410 senses the pressure inside the warehouse 800 and issues a command, and the pressure sensor receiver 420 receives the pressure. Instruction, according to the pressure instruction, control whether the small nitrogen generator 200 produces nitrogen. The produced nitrogen is transported to the interior of the warehouse 800 after being decompressed by the pressure reducing valve 300. Through pressure control, the interior of the grain 900 is controlled to be in a slightly positive pressure state to prevent external air from entering the interior of the warehouse 800. The small nitrogen generator 200 performs long-term or intermittent circulation of nitrogen filling inside the warehouse 800, thereby achieving the purpose of maintaining or increasing the nitrogen concentration, ensuring that the effective nitrogen concentration is maintained in the warehouse, and improving the nitrogen gas conditioning insecticide effect. The pressure sensor transmitter 410, the pressure sensor receiver 420, the nitrogen concentration sensor transmitter 510, and the nitrogen concentration sensor receiver 520 control whether the small nitrogen generator 200 is working and whether nitrogen is transported. The dehumidifier 600 and the cooling device 700 are installed on the circulation pipeline to adjust the temperature and humidity of the gas and improve the safety of grain storage. The small nitrogen generator 200, the dehumidifier 600, and the cooling device 700 can be operated independently and opened as needed.

2. According to the new process of slightly positive pressure circulation gas-controlled grain storage according to claim 1, it is characterized in that: According to some embodiments of the present invention, the small nitrogen generator 200 has two nitrogen making methods: one is circulating nitrogen making, in which the gas required for the small nitrogen generator 200 to make nitrogen comes out of the warehouse air outlet 820 and is provided by the gas in the warehouse and the outside air, so that the relatively high concentration of nitrogen in the warehouse is fully utilized to reduce the energy consumption of the small nitrogen generator 200 to make nitrogen; the other is direct nitrogen making, in which the gas required for the small nitrogen generator 200 to make nitrogen is directly provided by the outside air. The large nitrogen generator 100 and the small nitrogen generator 200 select suitable nitrogen making methods according to the needs.

3. According to the new process of slightly positive pressure circulation gas-controlled grain storage in claim 1, it is characterized by: The dehumidification device 600, such as a dehumidifier, is configured as needed and connected to the pipeline 830. The dehumidification capacity is configured as needed to meet the airtightness requirements.

4. According to the new process of slightly positive pressure circulation gas-controlled grain storage in claim 1, it is characterized by: The cooling device 700, such as an air conditioning refrigeration device, is configured as needed and connected to the pipeline 830. The cooling capacity is configured as needed to meet the airtightness requirements.

5. According to the new process of slightly positive pressure circulation gas-controlled grain storage in claim 1, it is characterized by: The pressure sensor transmitter 400 can detect the pressure value in the chamber, transmit the detected data, and has a remote data transmission function.

6. According to claim 1, the new process for slightly positive pressure circulation and controlled atmosphere grain storage is characterized in that: The pressure sensor receiver 500 can receive information from the pressure sensor transmitter 400, and can also set the working pressure range, connect to the small nitrogen generator 200, and control the operation of the small nitrogen generator 200 according to the set value.

7. According to claim 1, the new process for slightly positive pressure circulation and controlled atmosphere grain storage is characterized in that: The small nitrogen generator 200 can be selected in model and output according to demand, and has a remote control system. Wheels can be added to make it mobile, and it can be moved by a forklift without wheels.

8. According to claim 1, the new process for slightly positive pressure circulation and controlled atmosphere storage of grain is characterized by: The warehouse air outlet 820 is provided with a pressure valve, which can control whether to discharge air according to the pressure conditions. The gas discharged from the warehouse air outlet 820 is input into the small nitrogen generator 200 or directly discharged into the air.

9. According to claim 1, the new process for slightly positive pressure circulation and controlled atmosphere grain storage is characterized by: The nitrogen is one of the methods of controlled atmosphere grain storage, and can be applied to other gas controlled atmosphere grain storage methods, such as carbon dioxide and other gases. The gas required for controlled atmosphere grain storage is manufactured by machines or provided directly.

10. According to claim 1, the new process for slightly positive pressure circulation and controlled atmosphere grain storage is characterized in that: The cycle can be used as needed, and if not needed, it can be directly carried out by air supply. The pipeline can be made into a heat-insulated pipeline.

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