Grain drying machine capable of uniformly distributing air

Abstract

The utility model discloses a grain drying machine capable of uniformly distributing air, which comprises a tower body, a drying device, a drying device and a drying device, and is characterized in that the tower body comprises an inner tower and an outer tower which are sleeved with each other; the air supply pipe is vertically arranged on the axis of the inner tower; a plurality of air distribution pipes I; a plurality of air distribution pipes II; a feeding port I of the feeding bin is communicated with the grain discharging port of the inner tower, and a feeding port II of the feeding bin is communicated with the grain discharging port of the outer tower; one end of the air guide pipe communicates with the top of the outer tower, and the other end of the air guide pipe communicates with the feeding bin; a filter; a solid outlet of the solid-gas separator is communicated to a grain inlet of the outer tower through a grain guide pipe I; a gas inlet of the solid-gas separator communicates with the feeding bin through a negative pressure pipe I. An exhaust port of the solid-gas separator communicates with an air inlet of the negative pressure fan through a negative pressure pipe II. According to the grain drying machine with the uniform air distribution function, the uniform air distribution from top to bottom can be provided for grain drying, local overheating is avoided, and the product quality of dried grains is effectively guaranteed.

Description

Technical Field

[0001] This utility model relates to a grain dryer with uniform air distribution. Background Technology

[0002] Grain drying is a crucial step in grain storage and processing. Its purpose is to reduce the moisture content of grain, prevent mold and sprouting during storage, and thus ensure grain quality and safety. With the development of agricultural modernization, grain dryers are increasingly widely used in agricultural production. Traditional dryers often use bottom or side air supply, which can easily lead to uneven airflow distribution in the drying chamber. Grain near the air outlet is over-dried, while grain further away is under-dried, affecting drying quality. Chinese patent application number 202320122681.3 discloses a circulating partitioned air-drying grain silo, including a grain storage silo (1), a conveyor (10), an elevator (11), and a controller. This grain silo can air-dry and cool materials with high moisture or high temperature that are difficult to store (such as newly harvested grain, including but not limited to grain) by air blowing, circulation, or a combination of both, reducing the moisture content and temperature of the materials in the silo and improving the storage period and quality of the materials. However, in conjunction with the specification and its appendix... Figures 1-5 It can be seen that the above-mentioned circulating zone air-drying grain silo still uses the method of setting up a ring-shaped air duct 6 and an air distribution duct 7 at the bottom of the grain silo for air supply and drying. It still has the problem that the grain near the air outlet is over-dried, while the grain far away from the air outlet is under-dried. Utility Model Content

[0003] One object of this invention is to solve at least the problems described above and to provide at least the advantages that will be explained later.

[0004] Another objective of this invention is to provide a grain dryer with uniform air distribution, which can provide uniform air distribution from top to bottom for grain drying, avoid local overheating, and effectively ensure the product quality of the dried grain.

[0005] To achieve these objectives and other advantages according to the present invention, a grain dryer with uniform air distribution is provided, comprising:

[0006] The tower body includes an inner tower and an outer tower that are nested together, with the grain inlet of the inner tower connected to the external grain supply pipe.

[0007] The air supply duct is vertically installed on the axis of the inner tower, and the air inlet of the air supply duct is connected to the air outlet of the hot air blower.

[0008] Multiple air distribution ducts I are evenly spaced from top to bottom around the air supply duct I, and the air inlet end I of the multiple air distribution ducts I is connected to the air supply duct I. The closed end of the multiple air distribution ducts I extends outward, and multiple air distribution holes I are provided on the lower side wall of the multiple air distribution ducts I.

[0009] Multiple air distribution pipes II are evenly distributed in the outer tower from top to bottom, and the air inlet end II of the multiple air distribution pipes II passes through the side wall of the inner tower and connects to the drying chamber of the inner tower. Multiple air distribution holes II are provided on the lower side wall of the multiple air distribution pipes II. In the axial direction of the tower body, the multiple air distribution pipes II are staggered from each other with the multiple air distribution pipes I adjacent to each other.

[0010] The feeding hopper has its inlet I connected to the discharge port of the inner tower, and its inlet II connected to the discharge port of the outer tower.

[0011] The air duct has one end connected to the top of the outer tower and the other end connected to the feeding hopper, with the other end of the air duct located near the top of the feeding hopper.

[0012] A filter, which is installed on the air duct; and

[0013] The solid-gas separator is located above the tower body, and its solid outlet is connected to the grain inlet of the outer tower through the grain guide pipe I. The air inlet of the solid-gas separator is connected to the feeding hopper through the negative pressure pipe I, and the lower end of the negative pressure pipe I extends to the bottom of the feeding hopper. The exhaust outlet of the solid-gas separator is connected to the air inlet of the negative pressure fan through the negative pressure pipe II. In practical applications, the air outlet of the negative pressure fan can also be connected to the air inlet of the hot air fan through a pipeline, so that the air with kinetic energy can re-enter the drying cycle, making full use of the air kinetic energy and avoiding waste.

[0014] Preferably, it includes: multiple feeders, which are respectively installed at the feed inlet of the inner tower and the feed inlet of the outer tower.

[0015] Preferably, the feeding hopper is a horizontal, elongated barrel structure, with the bottom of the feeding hopper inclined toward the end where the negative pressure pipe I is installed, and the feed inlet I and feed inlet II are located at the other end near the feeding hopper.

[0016] Preferably, the outer tower's feed inlet includes two separate feed inlets, which are symmetrically arranged on both sides of the inner tower;

[0017] The grain guide pipe I includes two branch grain guide pipes I, which are respectively connected to two separate grain inlets and the solid outlet of the solid-gas separator;

[0018] Two solenoid valves I are respectively installed on the two branch grain guide pipes I.

[0019] Preferably, the solid outlet of the solid-gas separator is also connected to the inlet of the inner tower via the grain guide pipe II; the solenoid valve II is installed on the grain guide pipe II.

[0020] Preferably, the reducing tee discharge pipe has its main pipe connected to the discharge port of the outer tower, one branch pipe of the reducing tee discharge pipe connected to the feed inlet II of the feeding silo, and the other branch pipe of the reducing tee discharge pipe being the discharge port of the outer tower.

[0021] This utility model has at least the following beneficial effects:

[0022] The grain to be dried first enters the inner tower. After being circulated through the air supply duct, hot air is then sent into the inner tower through multiple air distribution ducts I. The hot air is evenly distributed throughout the inner tower from top to bottom, thus the grain to be dried is uniformly heated and dried by the hot air. At the same time, the hot air cools down, and the moisture in the grain evaporates into the air, forming cooled, humid air. Afterward, most of the humid air enters the outer tower through multiple air distribution ducts II, while a small portion of the humid air enters the feeding hopper with the falling grain. The grain entering the feeding hopper is drawn into the solid-gas separator through the negative pressure pipe I by the negative pressure fan for solid-gas separation. The separated grain enters the outer tower, while the separated air is discharged through the negative pressure pipe II and the negative pressure fan, thus completing one grain drying operation. During this process, the cooled, humid air discharged to the outer tower through multiple air distribution ducts II utilizes its residual heat to further dry the grain entering the outer tower at a low temperature before being discharged from the outer tower. This fully utilizes the residual heat of the air, avoids wasting thermal energy, and ensures that the grain has sufficient space and time for low-temperature drying and tempering, thus guaranteeing the quality of grain drying. Under the action of air pressure, the air continuously discharged from the outer tower, this humid and nearly saturated air, is filtered and dehumidified before entering the feeding hopper, providing a continuous supply of air for the negative pressure fan and avoiding unnecessary waste of air kinetic energy.

[0023] In summary, the grain dryer with uniform air distribution provided by this utility model can provide uniform air distribution from top to bottom for grain drying, avoid local overheating, and effectively ensure the product quality of dried grain.

[0024] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0025] Figure 1 This is a structural schematic diagram of a grain dryer with uniform air distribution according to one embodiment of the present invention;

[0026] Figure 2 for Figure 1 Schematic diagram of the cross-section at point a;

[0027] Figure 3 This is a cross-sectional structural diagram of the tower body according to one embodiment of the present invention;

[0028] Figure 4 This is a cross-sectional structural diagram of the feeding hopper in one embodiment of the present utility model;

[0029] Figure 5 This is a cross-sectional structural diagram of the tower body described in another embodiment of the present invention;

[0030] Figure 6 This is a cross-sectional structural diagram of the top of the tower body and the solid-gas separator in another embodiment of the present invention;

[0031] Figure 7 This is a cross-sectional structural diagram of the bottom of the tower body and the feeding hopper in another embodiment of the present invention. Detailed Implementation

[0032] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0033] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0034] like Figure 1 , 2As shown, this utility model provides a grain dryer with uniform air distribution, comprising: a tower body 1, which includes an inner tower 101 and an outer tower 102 nested together, the grain inlet 1011 of the inner tower being connected to an external grain supply pipe, and a grain outlet being provided at the bottom of the tower body; an air supply pipe 103, which is vertically arranged on the axis of the inner tower, and the air inlet end of the air supply pipe is connected to the air outlet of a hot air blower 2; and a plurality of air distribution pipes I 104, which are evenly spaced from top to bottom around the air supply pipe I, and the air inlet I of the plurality of air distribution pipes I is connected to the air supply pipe I, and the sealing of the plurality of air distribution pipes I... The system is designed with closed-end outward-radiating structures, and multiple air distribution ducts I have multiple air distribution holes I on their lower side walls. Hot air, passing through multiple air distribution holes I and II, is first blown downwards into the grain under local pressure. Then, under the pressure of the surrounding cold air, the hot air rises again, continuously contacting the falling grain. When the rising hot air comes into contact with the newly ejected, even hotter air, localized mixing occurs. Therefore, within the tower, from top to bottom, the ventilation simultaneously exhibits multiple flow patterns, including co-current, counter-current, and mixed flow, resulting in more uniform heating of the grain. To avoid localized overheating, multiple air distribution ducts II 105 are evenly distributed from top to bottom inside the outer tower. The air inlet II of each air distribution duct II passes through the side wall of the inner tower and connects to the drying chamber of the inner tower. Multiple air distribution holes II are provided on the lower side wall of each air distribution duct II. In the axial direction of the tower body, each air distribution duct II is staggered from its adjacent multiple air distribution ducts I. The feeding hopper 3 has its feeding inlet I connected to the grain discharge outlet 1012 of the inner tower, and its feeding inlet II connected to the grain discharge outlet 1022 of the outer tower. The air guide duct 4 has one end connected to the top of the outer tower. The tower has a duct 601, the other end of which is connected to the feeding hopper and is located near the top of the feeding hopper; a filter 5 is installed on the duct 601; and a solid-gas separator 6 is installed above the tower body, with the solid outlet 601 of the solid-gas separator connected to the grain inlet 1021 of the outer tower via the grain guide pipe I; the air inlet 602 of the solid-gas separator is connected to the feeding hopper via the negative pressure pipe I 7, with the lower end of the negative pressure pipe I extending to the bottom of the feeding hopper; and the exhaust port 603 of the solid-gas separator is connected to the air inlet of the negative pressure fan 9 via the negative pressure pipe II 8.

[0035] In this scheme, the grain to be dried first enters the inner tower. After being circulated through the air supply duct, hot air is then sent into the inner tower through multiple air distribution ducts I. The hot air is evenly distributed in the inner tower from top to bottom, and the grain to be dried is uniformly heated and dried by the hot air. At the same time, the hot air cools down, and the moisture in the grain evaporates into the air, forming cooled, humid air. Afterward, most of the humid air enters the outer tower through multiple air distribution ducts II, and the remaining small portion of humid air enters the feeding hopper with the falling grain. The grain entering the feeding hopper is drawn into the solid-gas separator through the negative pressure pipe I by the negative pressure fan for solid-gas separation. The separated grain enters the outer tower, while the separated air is discharged after passing through the negative pressure pipe II and the negative pressure fan, forming one grain drying operation. During this process, the cooled, humid air discharged to the outer tower through multiple air distribution ducts II utilizes its residual heat to further dry the grain entering the outer tower at a low temperature before being discharged from the outer tower. This fully utilizes the residual heat of the air, avoids wasting thermal energy, and ensures that the grain has sufficient space and time for low-temperature drying and tempering, thus guaranteeing the quality of grain drying. Under the action of air pressure, the air continuously discharged from the outer tower, this humid and nearly saturated air, is filtered and dehumidified before entering the feeding hopper, providing a continuous supply of air for the negative pressure fan and avoiding unnecessary waste of air kinetic energy.

[0036] In summary, the grain dryer with uniform air distribution provided by this utility model can provide uniform air distribution from top to bottom for grain drying, avoid local overheating, and effectively ensure the product quality of dried grain.

[0037] like Figure 3 As shown, a preferred embodiment includes multiple distributors 106, which are respectively installed at the grain inlet of the inner tower and the grain inlet of the outer tower. In this embodiment, the multiple distributors are used to evenly distribute the grain into the outer and inner towers, effectively avoiding excessively rapid falling and uneven accumulation of grain, which would affect the drying effect.

[0038] like Figure 4 As shown, in a preferred embodiment, the feeding hopper is a horizontal, elongated barrel structure. The bottom 303 of the feeding hopper is inclined towards the end 701 where the negative pressure pipe I is located. The inlet I 301 and inlet II 302 are located at the other end near the feeding hopper. In this embodiment, the grain entering the feeding hopper through inlet I and inlet II gradually concentrates towards the end of the negative pressure pipe I under the action of gravity, which helps the grain to approach and quickly enter the end of the negative pressure pipe I.

[0039] like Figure 5As shown, in a preferred embodiment, the outer tower's grain inlet includes two branch grain inlets symmetrically arranged on both sides of the inner tower; the grain guide pipe I includes two branch grain guide pipes I 604, which are respectively connected to the two branch grain inlets and the solid outlet of the solid-gas separator; two solenoid valves I 605 are respectively installed on the two branch grain guide pipes I. In this embodiment, the outer tower's accommodating space is a circular cylinder, and the two branch grain inlets can more effectively promote the uniform distribution and falling of grain into the outer tower, thereby improving drying efficiency.

[0040] like Figure 6 As shown, in a preferred embodiment, the solid outlet of the solid-gas separator is also connected to the grain inlet of the inner tower via a grain guide pipe II 606. In practical applications, the grain guide pipe II and the external grain supply pipe can be connected to the grain inlet of the inner tower via a three-way pipe, enabling internal grain circulation drying or selectively supplying grain to be dried only from the outside. A solenoid valve II 607 ​​is installed on the grain guide pipe II. In this embodiment, the grain guide pipe II and solenoid valve II are used to control the grain fed into the feeding hopper. They work effectively with two branch grain guide pipes I and two solenoid valves I to allow the grain to selectively enter either the outer tower or the inner tower. When solenoid valve II is closed, the grain is discharged after one drying operation through the inner tower, feeding hopper, and outer tower. When both solenoid valves I are closed, the grain can undergo more than two cycles of drying through the inner tower, feeding hopper, and inner tower before being simultaneously closed with solenoid valve II and opened with both solenoid valves I. This allows all the grain to enter the outer tower for low-temperature drying and tempering before being discharged, further ensuring the quality of the dried grain.

[0041] like Figure 7 As shown, in a preferred embodiment, the reducing tee grain outlet pipe 10 has its main port connected to the grain outlet of the outer tower, and one branch pipe of the reducing tee grain outlet pipe connected to the feed inlet II of the feeding hopper for introducing grain into the feeding hopper. At this time, the other branch pipe is in a closed state. The other branch pipe of the reducing tee grain outlet pipe is the grain discharge outlet of the outer tower for discharging the dried grain. At this time, one branch pipe connected to the feed inlet II of the feeding hopper is in a closed state.

[0042] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A grain dryer with uniform air distribution, characterized by, The tower body comprises an inner tower and an outer tower which are sleeved with each other, and a grain feeding pipe of the inner tower is connected to an external grain feeding pipe; An air feeding pipe is vertically arranged on the axis of the inner tower, and an air inlet of the air feeding pipe is connected to an air outlet of a hot air blower; A plurality of air distribution pipes I are uniformly and spacedly arranged around the air feeding pipe I from top to bottom, air inlets I of the air distribution pipes I are connected to the air feeding pipe I, closed ends of the air distribution pipes I extend outward, and a plurality of air distribution holes I are arranged on lower side walls of the air distribution pipes I; A plurality of air distribution pipes II are uniformly arranged in the outer tower from top to bottom, air inlets II of the air distribution pipes II are connected to a drying cavity of the inner tower through the side wall of the inner tower, a plurality of air distribution holes II are arranged on lower side walls of the air distribution pipes II, and the plurality of air distribution pipes II are arranged staggered with the plurality of air distribution pipes I adjacent thereto in the axial direction of the tower body; A feeding bin is connected to a grain discharging port of the inner tower, and a grain discharging port of the outer tower is connected to a feeding port II of the feeding bin; An air guide pipe is connected to the top of the outer tower at one end, and connected to the feeding bin at the other end, and the other end of the air guide pipe is arranged close to the top of the feeding bin; A filter is arranged on the air guide pipe; and A solid-gas separator is arranged above the tower body, a solid outlet of the solid-gas separator is connected to a grain feeding port of the outer tower through a grain guide pipe I, an air inlet of the solid-gas separator is connected to the feeding bin through a negative pressure pipe I, a lower end of the negative pressure pipe I extends to the bottom of the feeding bin, and an air outlet of the solid-gas separator is connected to an air inlet of a negative pressure blower through a negative pressure pipe II. The plurality of distributors are arranged at the grain feeding port of the inner tower and the grain feeding port of the outer tower, respectively.

2. The uniform air distribution grain dryer of claim 1, wherein, The feeding bin is a horizontal long strip barrel structure, the bottom of the feeding bin is inclined to one end of the negative pressure pipe I, and the feeding port I and the feeding port II are arranged close to the other end of the feeding bin. The grain feeding port of the outer tower comprises two symmetrical grain feeding ports arranged on both sides of the inner tower; 3. The uniform air distribution grain dryer of claim 1, wherein, The grain guide pipe I comprises two branch grain guide pipes I connected to the two grain feeding ports and the solid outlet of the solid-gas separator, respectively; 4. The uniform air distribution grain dryer of claim 1, wherein, Two electromagnetic valves I are arranged on the two branch grain guide pipes I, respectively. The solid outlet of the solid-gas separator is also connected to the grain feeding port of the inner tower through a grain guide pipe II, and an electromagnetic valve II is arranged on the grain guide pipe II. A reducer grain discharging pipe is connected to the grain discharging port of the outer tower at a main pipe port, one branch pipe of the reducer grain discharging pipe is connected to the feeding port II of the feeding bin, and the other branch pipe of the reducer grain discharging pipe is the grain discharging port of the outer tower.

5. The uniform air distribution grain dryer of claim 4, wherein, ​ 6. The uniform air distribution grain dryer of claim 1, wherein, ​

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