A grain stack moisture and heat removing device

Abstract

The present application relates to a kind of grain heap damp heat removal device, including outer tube and inner tube, the inner chamber bottom of outer tube is provided with baffle, baffle is divided into upper and lower condensation cavity and carbon dioxide release cavity of setting of outer tube's inner chamber, the lower end of inner tube is inserted into the carbon dioxide release cavity of baffle, the upper end of inner tube is connected with liquid carbon dioxide storage tank by liquid guide pipe, the bottom of inner tube is provided with the spray head in carbon dioxide release cavity, grain heap damp heat removal device also includes the drain pipe of water inlet end into the bottom of condensation cavity, the cavity wall of carbon dioxide release cavity is provided with first gas-permeable hole for carbon dioxide gas from inside to outside, the cavity wall of condensation cavity is provided with second gas-permeable hole for the damp heat gas in grain heap from outside to inside, the outer periphery of inner tube is provided with heat-conducting condensation structure across condensation cavity and carbon dioxide release cavity in up-down direction.The present application provides a kind of grain heap damp heat removal device capable of carrying out fixed-point damp heat removal to local heating area in grain heap.

Description

Technical Field

[0001] This invention relates to the field of bulk grain storage safety technology, and in particular to a device for removing damp heat from grain piles. Background Technology

[0002] Bulk grains are usually stored in granaries in the form of grain piles. During the storage process, excessively high pest density, moldy grains, or condensation can cause localized heating in the grain piles. It is necessary to remove the heat and moisture as soon as possible to prevent large-scale mold growth and food safety incidents.

[0003] In the prior art, the method for removing damp heat is usually to use a single-pipe ventilation device to locally ventilate the inside of the grain pile. By controlling the ventilation intensity and time, the damp heat is removed from the grain pile. The problems with 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 the damp heat from the grain pile, it will also cause the grain to lose moisture and cause the grain to lose weight; (2) During local ventilation, the damp and hot air is discharged into the space above the grain pile. If the damp and hot air condenses on the warehouse wall, the free water formed after condensation may flow back into the grain pile, causing the humidity of the loose grain to increase; (3) If the heat is caused by the 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 this invention is to provide a grain pile damp heat removal device that can remove damp heat from localized heated areas within the grain pile, thereby solving the technical problem that existing damp and hot air easily condenses on the warehouse walls and flows back into the grain pile.

[0005] To solve the above-mentioned technical problems, the technical solution of the grain pile moisture and heat removal device of the present invention is as follows: A grain pile heat removal device includes an outer tube inserted vertically into the grain pile during use. A partition is provided at the bottom of the inner cavity of the outer tube, dividing the inner cavity into a condensation chamber and a carbon dioxide release chamber arranged vertically. The device also includes an inner tube located inside the outer tube. The lower end of the inner tube passes through the partition and extends into the carbon dioxide release chamber. The upper end of the inner tube is connected to a liquid carbon dioxide storage tank via a liquid guide pipe. A nozzle is provided at the bottom of the inner tube within the carbon dioxide release chamber. The device further includes a drain pipe with its inlet end extending into the bottom of the condensation chamber. The outlet end of the drain pipe is connected to a water pump and a water tank. A first vent hole is provided on the wall of the carbon dioxide release chamber for carbon dioxide gas to pass from the inside to the outside. A second vent hole is provided on the wall of the condensation chamber for hot and humid gas in the grain pile to pass from the outside to the inside. A heat-conducting condensation structure is provided on the outer periphery of the inner tube, spanning the condensation chamber and the carbon dioxide release chamber in a vertical direction.

[0006] Furthermore, the heat-conducting condensation structure includes a condenser tube sleeved around the outer periphery of the inner tube, and multiple condenser fins arranged radially around the outer periphery of the condenser tube. 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 condenser fins are located in the carbon dioxide release chamber.

[0007] Furthermore, the partition is provided with fitting holes for the condenser fins and condenser tubes to be fitted and sealed.

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

[0009] Furthermore, an axial flow fan is fitted at the upper end of the inner tube to blow airflow from bottom to top within the inner condensing chamber. The axial flow fan is located on the upper side of the condenser tube and condenser fins.

[0010] Furthermore, a grain baffle is provided at the upper end of the outer tube. The grain baffle is located above the axial flow fan, and vertically arranged third ventilation holes are distributed on the grain baffle.

[0011] The beneficial effects of this invention are as follows: When using the grain pile heat removal device of this invention, the outer tube is vertically inserted into the locally heated grain pile, and the liquid guide tube sends liquid carbon dioxide into the inner tube. The liquid carbon dioxide is sprayed into the carbon dioxide release chamber through the nozzle. The liquid carbon dioxide will vaporize, absorbing heat during the vaporization process, thus cooling the heat-conducting condensation structure. At the same time, the vaporized carbon dioxide gas forms a certain pressure in the carbon dioxide release chamber. Under this pressure, the carbon dioxide gas will flow from the inside to the outside of the first vent hole into the surrounding grain pile. Because carbon dioxide gas is relatively heavy, it will move from the inside to the outside at the bottom of the heated grain pile. During the movement, carbon dioxide... Carbon gas rises after being gradually heated by the surrounding humid and hot gas. Meanwhile, the humid and hot gas outside the condensation chamber enters the condensation chamber from the outside to the inside through the second vent. After contacting the cooler heat-conducting condensation structure, the humid and hot gas forms condensate that flows to the bottom of the condensation chamber. The condensate is then pumped away, thus removing the humid and hot gas. At the same time, it effectively increases the concentration of carbon dioxide in the original humid and hot grain pile. The increased carbon dioxide concentration can kill or inhibit the occurrence of pests. The humid and hot air can be quickly condensed and cooled, which helps to rapidly reduce the temperature of the humid and hot air and shorten the time required to remove the humid and hot air, thereby avoiding the technical problem of severe moisture loss from loose grain particles. Attached Figure Description

[0012] The above and other objects, features, and advantages of this disclosure will become readily apparent from the following detailed description of exemplary embodiments with reference to the accompanying drawings. In the drawings, several embodiments of this disclosure are illustrated by way of example and not limitation, and like or corresponding reference numerals denote like or corresponding portions, wherein: Figure 1This is a schematic diagram of the structure of one embodiment of the present invention; Figure 2 yes Figure 1 Enlarged view of point A in the image; Figure 3 yes Figure 1 Enlarged view of point B in the image; Figure 4 yes Figure 1 A schematic diagram of the inner tube, condenser structure, baffle and outer tube assembly from a top-down view; 1. Liquid carbon dioxide storage tank; 2. Liquid guide pipe; 3. Water tank; 4. Water pump; 5. Drain pipe; 6. Axial flow fan; 7. Grain pile; 8. Outer pipe; 9. Grain baffle; 10. Third vent; 11. Inner pipe; 12. Heat-conducting condensation structure; 13. Second vent; 14. Condensation chamber; 15. Baffle; 16. First vent; 17. Carbon dioxide release chamber; 18. Nozzle; 19. Motor housing; 20. Motor shaft; 21. Fan blade; 22. Condensation pipe; 23. Condensation fins. Detailed Implementation

[0013] To facilitate understanding of the present invention, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0014] It should be noted that, unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention.

[0015] An example of an embodiment of a grain pile moisture and heat removal device of the present invention Figures 1-4 As shown: It includes an outer tube 8 that is inserted vertically into the grain pile when in use. The bottom of the outer tube 8 is provided with a conical tip structure to facilitate insertion into the grain pile. The top of the grain pile is provided with a grain baffle 9. The grain baffle 9 has vertically arranged third ventilation holes 10. The size of the third ventilation holes 10 is smaller than the particle size of the loose grain, so the loose grain cannot enter the outer tube 8 through the third ventilation holes.

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

[0017] The grain pile heat removal device also includes an inner tube 11 located inside the outer tube. The lower end of the inner tube 11 extends through the partition 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 guide pipe 2. A nozzle 18 located in the carbon dioxide release chamber is provided at the bottom of the inner tube.

[0018] The grain pile heat removal device also includes a drain pipe 5 with its inlet end extending into the bottom of the condensation chamber. The outlet end of the drain pipe 5 is connected to a water pump and a water tank. The drain pipe is fixed to the inner wall of the outer pipe 8.

[0019] A heat-conducting condensing structure 12 is provided on the outer periphery of the inner tube 11, spanning the condensing chamber and the carbon dioxide release chamber in a vertical direction. In this embodiment, the inner tube 11 is made of a heat-conducting material, such as copper or aluminum. The heat-conducting condensing structure 12 includes a condensing tube 22 sleeved on the outer periphery of the inner tube. The inner wall of the condensing tube 22 is in contact with the outer periphery of the inner tube, or the space between them is filled with heat-conducting adhesive. A plurality of condensing fins 23 are arranged radially around the axis of the condensing tube on the outer periphery. The upper ends of the condensing tube 22 and the condensing fins 23 are located in the condensing chamber 14, and the lower ends of the condensing tube 22 and the condensing fins 23 are located in the carbon dioxide release chamber 17. The condensing tube and the condensing fins are made of copper or aluminum.

[0020] The partition 15 is provided with fitting holes for the condenser fins 23 and condenser tubes 22 to be fitted and sealed. The partition is made of heat-insulating material, which can be rubber or foam material.

[0021] An axial flow fan 6 is fitted onto the upper end of the inner tube to blow airflow from bottom to top within the inner condensing chamber. The axial flow fan 6 is located above the condensing pipe 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. The motor housing 19 contains a stator and a hollow rotor. A hollow motor shaft 20, fitted around the inner tube, is fixed to the rotor. The fan blades 21 are fixed to the motor shaft 20. In other embodiments of the invention, the axial flow fan may not be installed inside the condensing chamber. For example, the fan may be installed outside the outer tube, connected to the upper end of the condensing chamber via a duct to maintain a negative pressure environment within the condensing chamber.

[0022] The grain baffle 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 baffle 9.

[0023] When in use, if localized damp heat is detected in a grain pile, the outer tube of this grain pile damp heat removal device is inserted into the damp location of the grain pile. The axial flow fan operates, and simultaneously, the liquid carbon dioxide storage tank sends liquid carbon dioxide into the nozzle through the inner tube. The liquid carbon dioxide is sprayed out into the carbon dioxide release chamber through the nozzle, where it turns into gaseous carbon dioxide. During the vaporization process, the carbon dioxide absorbs heat and increases in volume. This heat absorption process causes the temperature at the lower end of the condenser fins to begin to decrease. As the heat conduction process continues, the temperature of the condenser fins and condenser tubes in the condensation chamber also decreases. The carbon dioxide gas passes through the first vent from the inside to the outside and enters the surrounding grain pile, then diffuses from the inside to the outside and from the bottom to the top. Meanwhile, the upper layer of damp heat gas enters the condensation chamber from the outside to the inside through the second vent. The damp heat gas comes into contact with the condenser fins and condenser tubes, and the damp heat gas is pre-cooled to form condensate. The design of the condenser fins ensures that the heat conduction condensation structure can achieve a low temperature and also ensures a sufficiently large contact area with the damp heat gas. The condensate flows along the heat-conducting condensation structure to the upper side of the partition, and is then pumped into the water tank through the drain pipe to prevent the condensate from entering the grain pile and affecting the moisture content of the loose grain particles. Figure 1 The direction of the middle arrow indicates the direction of airflow inside the grain pile.

[0024] In the foregoing description of this specification, unless otherwise expressly specified and limited, the terms "fixed," "installed," "connected," or "linked" should be interpreted broadly. For example, the term "linked" can refer to 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 an indirect connection through an intermediate medium; or it can refer to the internal communication of two components or the interaction between two components. Therefore, unless otherwise expressly limited in this specification, those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0025] Based on the above description in this specification, those skilled in the art will also understand that terms used, such as "upper," "lower," "front," "rear," "left," "right," "length," "width," "thickness," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," "center," "longitudinal," "transverse," "clockwise," or "counterclockwise," are terms indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings of this specification. They are only for the purpose of facilitating the explanation of the present invention and simplifying the description, and do not imply that the devices or elements involved must have the specific orientation, or be constructed and operated in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms should not be understood or interpreted as limitations on the present invention.

[0026] Furthermore, the terms "first" or "second," etc., used in this specification to refer to numbers or ordinal numbers are for descriptive purposes only and should not be construed as indicating, explicitly or implicitly, relative importance or specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this specification, "a plurality of" means at least two, such as two, three, or more, unless otherwise explicitly specified.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A device for removing damp heat from grain piles, characterized in that: The device includes an outer tube inserted vertically into the grain pile during use. A partition is installed at the bottom of the inner cavity of the outer tube, dividing the inner cavity into a condensation chamber and a carbon dioxide release chamber, positioned vertically. The grain pile heat removal device also includes an inner tube located inside the outer tube. The lower end of the inner tube passes through the partition and extends into the carbon dioxide release chamber. The upper end of the inner tube is connected to a liquid carbon dioxide storage tank via a liquid guide pipe. A nozzle is installed at the bottom of the inner tube within the carbon dioxide release chamber. The device also includes a drain pipe with its inlet end extending into the bottom of the condensation chamber. The outlet end of the drain pipe is connected to a water pump and a water tank. The wall of the carbon dioxide release chamber has a first vent hole for carbon dioxide gas to pass through from the inside to the outside, and the wall of the condensation chamber has a second vent hole for hot and humid gas from the grain pile to pass through from the outside to the inside. A heat-conducting condensation structure is provided on the outer periphery of the inner tube, running vertically across the condensation chamber and the carbon dioxide release chamber. The heat-conducting condensing structure includes a condenser tube fitted around the outer periphery of an inner tube. Multiple condenser fins are arranged radially around the outer periphery of the condenser tube, with the upper ends of the condenser tube and condenser fins located in the condensing cavity and the lower ends of the condenser tube and condenser fins located in the carbon dioxide release cavity. An axial flow fan for blowing airflow from bottom to top in the condensing cavity is fitted onto the upper end of the inner tube. The axial flow fan is located on the upper side of the condenser tube and condenser fins.

2. The grain pile moisture and heat removal device according to claim 1, characterized in that: The partition is provided with fitting holes for the condenser fins and condenser tubes to be fitted and sealed.

3. The grain pile moisture and heat removal device according to claim 1, characterized in that: The partition is made of heat-insulating material.

4. The grain pile moisture and heat removal device according to claim 1, characterized in that: A grain baffle is installed at the upper end of the outer tube. The grain baffle is located on the upper side of the axial flow fan, and vertically arranged third ventilation holes are distributed on the grain baffle.

Images