Grain pile damp heat removing device

Abstract

The invention relates to a grain pile damp heat removing device which comprises an outer pipe and an inner pipe, a partition plate is arranged at the bottom of an inner cavity of the outer pipe and divides the inner cavity of the outer pipe into a condensation cavity and a carbon dioxide release cavity which are arranged up and down, and the lower end of the inner pipe penetrates through the partition plate and extends into the carbon dioxide release cavity. The upper end of the inner pipe is connected with a liquid carbon dioxide storage tank through a liquid guide pipe, a spray head located in the carbon dioxide release cavity is arranged at the bottom of the inner pipe, and the grain pile damp and heat removing device further comprises a drainage pipe with the water inlet end stretching into the bottom of the condensation cavity. The cavity wall of the carbon dioxide release cavity is provided with first air holes for carbon dioxide gas to pass through from inside to outside, the cavity wall of the condensation cavity is provided with second air holes for damp and hot gas in a grain pile to pass through from outside to inside, and the periphery of the inner pipe is provided with a heat conduction condensation structure stretching across the condensation cavity and the carbon dioxide release cavity in the vertical direction. The grain pile damp and heat removing device can conduct fixed-point damp and heat removing on a local heating area in a grain pile.

Description

Technical Field

[0001] The invention relates to the technical field of bulk grain storage safety, and in particular to a grain pile moisture and heat removal device. Background Art

[0002] Bulk grain is usually stored in grain silos in the form of grain piles. During the storage process, excessive pest density, grain mildew or condensation can cause local heating of the grain pile. The moisture and heat must be removed as soon as possible to avoid large-scale mildew and food safety incidents.

[0003] In the prior art, the method of removing moisture and heat is usually to use a single-tube ventilation device to perform local ventilation inside the grain pile, and to remove moisture and heat from the grain pile by controlling the ventilation intensity and time. The problems of the prior art are: (1) In order to reduce the local grain temperature, long-term ventilation is required under normal working conditions. Although this can remove moisture and heat from the grain pile, it will also cause moisture loss in the grain and cause weight loss of the grain; (2) During local ventilation, the moist and hot air is discharged into the upper space of the grain pile. If the moist and hot air encounters cold and condenses on the warehouse wall, the free water formed after condensation may flow to the grain pile again, causing the humidity of the bulk grain to increase; (3) If the heat is caused by an excessively high density of pests, local ventilation cannot kill the pests. After ventilation and cooling, the surviving pests can still cause heat again. In other words, local ventilation cannot solve the problem of grain pile heat caused by pests from the source. Summary of the invention

[0004] The purpose of the present invention is to provide a grain pile moisture and heat removal device capable of performing targeted moisture and heat removal on a local heating area in a grain pile, so as to solve the technical problem that the existing moist and hot air is prone to condense on the warehouse wall and flow back to the grain pile.

[0005] In order to solve the above technical problems, a technical solution of a grain pile heat removal device in the present invention is as follows: A grain pile moisture and heat removal device comprises an outer tube which is vertically inserted into the grain pile when in use, a partition is arranged at the bottom of the inner cavity of the outer tube, the partition divides the inner cavity of the outer tube into a condensation cavity and a carbon dioxide release cavity which are arranged up and down, the grain pile moisture and heat removal device also comprises an inner tube which is located inside the outer tube, the lower end of the inner tube passes through the partition and extends into the carbon dioxide release cavity, the upper end of the inner tube is connected to a liquid carbon dioxide storage tank through a liquid guide tube, a nozzle which is located in the carbon dioxide release cavity is arranged at the bottom of the inner tube, the grain pile moisture and heat removal device also comprises a drainage pipe whose water inlet end extends into the bottom of the condensation cavity, the water outlet end of the drainage pipe is connected to a water pump and a water tank, a first air vent is arranged on the cavity wall of the carbon dioxide release cavity for carbon dioxide gas to pass from the inside to the outside, a second air vent is arranged on the cavity wall of the condensation cavity for hot and humid gas in the grain pile to pass from the outside to the inside, and a heat-conducting condensation structure which spans the condensation cavity and the carbon dioxide release cavity in the up and down directions is arranged on the outer periphery of the inner tube.

[0006] Furthermore, the heat-conducting condensation structure includes a condenser tube sleeved on the outer periphery of the inner tube, and a plurality of condenser fins are arranged on the outer periphery of the condenser tube and radially distributed with the axis of the condenser tube as the center, the upper ends of the condenser tube and the condenser fins are located in the condensation chamber, and the lower ends of the condenser tube and the condensation fins are located in the carbon dioxide release chamber.

[0007] Furthermore, the partition is provided with holes for the condensing fins and the condensing tubes to be sealed and installed.

[0008] Furthermore, the partition is made of heat insulating material.

[0009] Furthermore, an axial flow fan for blowing the airflow in the inner condensation chamber from bottom to top is mounted on the upper end of the inner tube, and the axial flow fan is located on the upper side of the condensation tube and the condensation fins.

[0010] Furthermore, a grain blocking plate is provided at the upper end of the outer tube, the grain blocking plate is located on the upper side of the axial flow fan, and vertically arranged third air holes are distributed on the grain blocking plate.

[0011] The beneficial effects of the present invention are as follows: when the grain pile wet heat removal device of the present invention is used, the outer tube is vertically inserted into the grain pile where local heating occurs, the liquid guide tube sends carbon dioxide liquid into the inner tube, the carbon dioxide liquid is sprayed into the carbon dioxide release chamber through the nozzle, the liquid carbon dioxide will be vaporized, and heat will be absorbed during the vaporization process, so the heat-conducting condensation structure will cool down, and at the same time, the vaporized carbon dioxide gas will form a certain pressure in the carbon dioxide release chamber, under this pressure, the carbon dioxide gas will flow from the inside to the outside through the first air hole to the surrounding grain pile, because the carbon dioxide gas is heavier, so the carbon dioxide gas will move from the inside to the outside at the bottom of the heated grain pile, and during the movement, the carbon dioxide The carbon gas is gradually heated by the surrounding humid and hot gas and then moves upward, while the humid and hot gas outside the condensation chamber will enter the condensation chamber from the outside to the inside through the second air permeable hole. After contacting the heat-conducting condensation structure with a lower temperature, the humid and hot gas forms condensed water and flows to the bottom of the condensation chamber. The condensed water is pumped away by the water pump, which can remove the humid and hot gas while effectively increasing the carbon dioxide gas concentration in the grain pile in the original humid and hot area. The increase in carbon dioxide concentration can kill insects or inhibit the occurrence of pests. The humid and hot air can be quickly condensed and cooled, which helps to quickly reduce the temperature of the humid and hot air and reduce the humid and hot air removal time, thereby avoiding the technical problem of serious moisture loss in bulk grain particles. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] By reading the following detailed description with reference to the accompanying drawings, the above and other objects, features and advantages of the exemplary embodiments of the present disclosure will become readily understood. In the accompanying drawings, several embodiments of the present disclosure are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein: Figure 1It is a schematic structural diagram of an embodiment of the present invention; Figure 2 yes Figure 1 A in the enlarged view; Figure 3 yes Figure 1 The enlarged view of point B in the figure; Figure 4 yes Figure 1 A schematic diagram of the coordination of the inner tube, the condensation structure, the partition and the outer tube in the top view; 1. Liquid carbon dioxide storage tank; 2. Liquid guide tube; 3. Water tank; 4. Water pump; 5. Drain pipe; 6. Axial flow fan; 7. Grain pile; 8. Outer pipe; 9. Grain retaining plate; 10. Third air vent; 11. Inner pipe; 12. Heat-conducting condensation structure; 13. Second air vent; 14. Condensation chamber; 15. Partition; 16. First air vent; 17. Carbon dioxide release chamber; 18. Nozzle; 19. Motor housing; 20. Motor shaft; 21. Fan blades; 22. Condensation tube; 23. Condensation fins. DETAILED DESCRIPTION

[0013] In order to facilitate the understanding of the present invention, the present invention is described in more detail below in conjunction with the accompanying drawings and specific embodiments. Preferred embodiments of the present invention are provided in the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described in this specification. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0014] It should be noted that, unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0015] An embodiment of a grain pile heat removal device of the present invention is as follows: Figures 1 to 4 As shown: It includes an outer tube 8 which is inserted vertically into the grain pile when in use, the bottom of the outer tube 8 is provided with a cone tip structure which is convenient for inserting into the grain pile, the top of the grain pile is provided with a grain blocking plate 9, and the grain blocking plate 9 is provided with vertically arranged third air holes 10, the size of the third air holes 10 is smaller than the particle size of the loose grain, and the loose grain cannot enter the outer tube 8 through the third air holes.

[0016] A partition 15 is provided at the bottom of the inner cavity of the outer tube 8, and the partition 15 divides the inner cavity of the outer tube into a condensation chamber 14 and a carbon dioxide release chamber 17 arranged upper and lower. The cavity wall of the carbon dioxide release chamber 17 is provided with a first air hole 16 for the carbon dioxide gas to pass from the inside to the outside, and the cavity wall of the condensation chamber 14 is provided with a second air hole 13 for the humid and hot gas in the grain pile to pass from the outside to the inside.

[0017] The grain pile wet heat removal device also includes an inner tube 11 located inside the outer tube, the lower end of the inner tube 11 passes through the partition and extends into the carbon dioxide release chamber 17, the upper end of the inner tube 11 is connected to the liquid carbon dioxide storage tank 1 through the liquid conduit 2, and a nozzle 18 located in the carbon dioxide release chamber is provided at the bottom of the inner tube.

[0018] The grain pile moisture and heat removal device also includes a drainage pipe 5 whose water inlet end extends into the bottom of the condensation chamber, and the water outlet end of the drainage pipe 5 is connected to a water pump and a water tank. The drainage pipe is fixed on the inner pipe wall of the outer pipe 8.

[0019] The outer periphery of the inner tube 11 is provided with a heat-conducting condensation structure 12 that spans the condensation chamber and the carbon dioxide release chamber in the up-down direction. In this embodiment, the inner tube 11 is made of a heat-conducting material, for example, the inner tube is made of copper or aluminum, and the heat-conducting condensation structure 12 includes a condensation tube 22 sleeved on the outer periphery of the inner tube, the inner wall of the condensation tube 22 is in contact with the outer periphery of the inner tube or the two are filled with heat-conducting glue, and the outer periphery of the condensation tube is provided with a plurality of condensation fins 23 radially distributed with the axis of the condensation tube as the center, the upper ends of the condensation tube 22 and the condensation fins 23 are located in the condensation chamber 14, and the lower ends of the condensation tube 22 and the condensation fins 23 are located in the carbon dioxide release chamber 17, and the condensation tube and the condensation fins are made of copper or aluminum.

[0020] The partition 15 is provided with holes for sealing and fitting the condensing fins 23 and the condensing tubes 22. The partition is made of a heat insulating material, which may be rubber or foam material.

[0021] The upper end of the inner tube is provided with an axial flow fan 6 for blowing the airflow from bottom to top in the inner condensing chamber, and the axial flow fan 6 is located on the upper side of the condensing tube 22 and the condensing fins 23. In this embodiment, the axial flow fan 6 includes a motor housing 19 fixed to the outer periphery of the inner tube 11, and a stator and a hollow rotor are arranged in the motor housing 19. A motor shaft 20 with a hollow structure sleeved on the outer periphery of the inner tube is fixed on the rotor, and the fan blades 21 of the axial flow fan are fixed on the motor shaft 20. In other embodiments of the present invention, the axial flow fan may not be arranged in the condensing chamber, for example, a fan is arranged on the outer side of the outer tube, and the fan is connected to the upper end of the condensing chamber through an air duct to maintain a negative pressure environment in the condensing chamber.

[0022] The grain blocking plate 9 is located on the upper side of the axial flow fan 6 , and the upper end of the inner tube 11 is fixedly passed through the center of the grain blocking plate 9 .

[0023] During use, when a certain part of the grain pile is monitored to be damp and hot, the outer tube of the grain pile damp and heat removal device is inserted into the damp and hot position of the grain pile, the axial flow fan starts to work, and at the same time, the liquid carbon dioxide storage tank sends liquid carbon dioxide to the nozzle through the inner tube, and the liquid carbon dioxide is sprayed into the carbon dioxide release chamber through the nozzle, and the liquid carbon dioxide becomes gaseous carbon dioxide. During the gasification process of carbon dioxide, it absorbs heat and increases in volume. The heat absorption process causes the temperature of the lower end of the condensation fin to begin to decrease. As the heat conduction process proceeds, the temperature of the condensation fin and the condensation tube in the condensation chamber will also decrease. The carbon dioxide gas passes through the first air vent from the inside to the outside into the surrounding grain pile, and then diffuses from the inside to the outside and from the bottom to the top, and the upper layer of damp and hot gas will enter the condensation chamber from the outside to the inside through the second air vent, and the damp and hot gas contacts the condensation fins and the condensation tube, and the damp and hot gas is pre-cooled to form condensed water. The setting of the condensation fins ensures that the heat conduction condensation structure can obtain a lower temperature and also ensures a sufficiently large contact area with the damp and hot gas. The condensed water flows along the heat-conducting condensation structure to the upper side of the partition, and is pumped into the water tank through the drain pipe to prevent the condensed water from entering the grain pile and affecting the humidity of the bulk grain particles. Figure 1 The direction of the arrow in the middle indicates the direction of airflow inside the grain pile.

[0024] In the above description of this specification, unless otherwise clearly specified and limited, the terms "fixed", "installed", "connected" or "connected" should be understood in a broad sense. For example, with regard to the term "connection", it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements. Therefore, unless otherwise clearly defined in this specification, those skilled in the art can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0025] According to the above description of this specification, those skilled in the art may also understand that the terms used below, such as "up", "down", "front", "back", "left", "right", "length", "width", "thickness", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", "center", "longitudinal", "lateral", "clockwise" or "counterclockwise", etc., which indicate the orientation or position relationship, are based on the orientation or position relationship shown in the drawings of this specification, and are only for the purpose of facilitating the explanation of the scheme of the present invention and simplifying the description, rather than explicitly or implicitly indicating that the device or element involved must have the specific orientation, be constructed and operate in a specific orientation. Therefore, the above-mentioned orientation or position relationship terms cannot be understood or interpreted as limitations on the scheme of the present invention.

[0026] In addition, the terms "first" or "second" used in this specification to refer to numbers or ordinals are only used for descriptive purposes and cannot be understood as explicitly or implicitly indicating relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this specification, the meaning of "plurality" is at least two, such as two, three or more, etc., unless otherwise clearly and specifically defined.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A grain pile heat removal device, characterized in that: The invention comprises an outer tube which is vertically inserted into a grain pile when in use, a partition is arranged at the bottom of the inner cavity of the outer tube, the partition divides the inner cavity of the outer tube into a condensation cavity and a carbon dioxide release cavity which are arranged up and down, the grain pile wet and heat removal device also comprises an inner tube which is located inside the outer tube, the lower end of the inner tube passes through the partition and extends into the carbon dioxide release cavity, the upper end of the inner tube is connected to a liquid carbon dioxide storage tank through a liquid guide tube, a nozzle which is located in the carbon dioxide release cavity is arranged at the bottom of the inner tube, the grain pile wet and heat removal device also comprises a drainage pipe whose water inlet end extends into the bottom of the condensation cavity, the water outlet end of the drainage pipe is connected to a water pump and a water tank, a first air vent is arranged on the cavity wall of the carbon dioxide release cavity for carbon dioxide gas to pass from the inside to the outside, a second air vent is arranged on the cavity wall of the condensation cavity for wet and hot gas in the grain pile to pass from the outside to the inside, and a heat-conducting condensation structure which spans the condensation cavity and the carbon dioxide release cavity in the up and down directions is arranged on the outer periphery of the inner tube.

2. The grain pile heat removal device according to claim 1, characterized in that: The heat-conducting condensation structure includes a condenser tube sleeved on the outer periphery of an inner tube, and a plurality of condenser fins are arranged on the outer periphery of the condenser tube and radially distributed with the axis of the condenser tube as the center. The upper ends of the condenser tube and the condenser fins are located in the condensation chamber, and the lower ends of the condenser tube and the condensation fins are located in the carbon dioxide release chamber.

3. The grain pile heat removal device according to claim 2, characterized in that: The partition is provided with holes for the condensing fins and the condensing tubes to be sealed and installed.

4. The grain pile heat and moisture removal device according to claim 2, characterized in that: The partition is made of heat insulating material.

5. The grain pile heat and moisture removal device according to any one of claims 2 to 4, characterized in that: An axial flow fan for blowing the airflow in the condensation chamber from bottom to top is mounted on the upper end of the inner tube, and the axial flow fan is located on the upper side of the condensation tube and the condensation fins.

6. The grain pile heat and moisture removal device according to claim 5, characterized in that: A grain blocking plate is arranged at the upper end of the outer tube, the grain blocking plate is located on the upper side of the axial flow fan, and vertically arranged third air holes are distributed on the grain blocking plate.

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