Internal-heating continuous grain drying tower and working method

Abstract

The internal-heating continuous grain drying tower comprises a tower body, an angular box is arranged in the tower body, one side of the angular box is a combustion side, the other side of the angular box is a sedimentation side, a top induced draft fan is arranged at the top of the sedimentation side, a circulating air duct is arranged at the bottom of the angular box, and a circulating fan is installed in the circulating air duct. The bottom of the settling side and the bottom of the combustion side are each provided with a grain collecting hopper, each grain collecting hopper is provided with a grain position detecting element, the height of each grain position detecting element is lower than that of the circulating air duct, and a grain outlet in the bottom of each grain collecting hopper corresponds to the grain inlet end of the conveying mechanism. By means of the grain drying tower, manual cleaning is avoided, the labor cost is reduced, and the drying efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of grain drying, and in particular to an internal heating continuous grain drying tower and a working method. Background Art

[0002] The statements herein merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] At present, when the internal heat continuous grain drying tower is drying grain, due to its structural and process problems, the grain and impurities in the drying layer are partially carried out from the corner box outlet by the top induced draft fan and the bottom circulating fan airflow, and fall to the sedimentation side. The grain and impurities that fall to the sedimentation side are partially sucked into the combustion chamber due to the suction force of the bottom circulating fan. When the grain and impurities accumulate in large quantities, they will block the air duct of the bottom circulating fan, reducing the air volume of the circulating fan and increasing the energy consumption of the drying tower. The current solution is to close the drying tower once a day, and the operator enters the tower to clean it, which consumes a lot of time and reduces the drying efficiency of the drying tower. Summary of the invention

[0004] In view of the deficiencies in the prior art, the purpose of the present invention is to provide an internally heated continuous grain drying tower and a working method, which avoids manual entry into the tower for cleaning, saving time and labor costs.

[0005] In order to achieve the above object, the present invention is implemented through the following technical solutions: In the first aspect, an embodiment of the present invention provides an internal heating continuous grain drying tower, including a tower body, wherein an angular box is arranged in the tower body, one side of the angular box is a combustion side and the other side is a settling side, a top induced draft fan is arranged at the top of the settling side, a circulating air duct is arranged at the bottom of the angular box, and a circulating air duct is installed with a circulating fan, a grain collecting hopper is arranged at the bottom of the settling side and the combustion side, the grain collecting hopper is provided with a grain level detection element, the height of the grain level detection element is lower than the circulating air duct, and the grain outlet at the bottom of the grain collecting hopper corresponds to the grain inlet end of the conveying mechanism.

[0006] Optionally, the grain collecting hopper at the bottom of the sedimentation side adopts an inverted cone-shaped funnel structure, the grain collecting hopper is fixedly connected to the tower body, and a grain outlet is provided at the bottom of the grain collecting hopper.

[0007] Optionally, the grain collecting hopper at the bottom of the combustion side adopts an inverted cone-shaped funnel structure, the grain collecting hopper is fixedly connected to the tower body, and a grain outlet is provided at the bottom of the grain collecting hopper.

[0008] Optionally, the conveying mechanism at the grain outlet of the grain collecting hopper on the sedimentation side adopts an auger conveyor.

[0009] Optionally, the conveying mechanism at the grain outlet of the grain collecting hopper on the combustion side adopts an auger conveyor.

[0010] Optionally, the grain level detection element adopts a rotary resistance type material level sensor.

[0011] Optionally, the tower body portion corresponding to the combustion side is provided with a combustion side inspection door.

[0012] Optionally, a settlement side inspection door is provided on the tower body portion corresponding to the settlement side.

[0013] Optionally, the circulation fan is arranged at the end of the circulation channel close to the settling side.

[0014] On the second aspect, an embodiment of the present invention provides a working method of an internally heated continuous grain drying tower: the top induced draft fan and the circulating fan work to drive the hot air to circulate in the flow of the settling side, the combustion side and the angular box to dry the grain in the angular box; when the grain level detection element installed on the grain collecting hopper at the bottom of the settling side and / or the combustion side detects that the grain level in the grain collecting hopper has reached the set grain level, the corresponding conveying mechanism is started, and the conveying mechanism delivers the grain dropped from the grain collecting hopper to the outside of the tower body.

[0015] The beneficial effects of the present invention are as follows: The internal heat continuous grain drying tower of the present invention is provided with a grain collecting hopper at the bottom of the sedimentation side and the combustion side. The grain collecting hopper is provided with a grain level detection element. The bottom grain outlet of the grain collecting hopper corresponds to the feeding end of the conveying mechanism. Since the height of the grain level detection element is lower than the height of the circulating air duct, when the grain level in the grain collecting hopper reaches the grain level detection element, the conveying mechanism can be used to deliver the grain discharged from the grain outlet, so that the grain level in the grain collecting hopper does not exceed the height of the grain level detection element, thereby avoiding the blockage of the circulating fan and the circulating air duct after a large amount of grain and impurities are accumulated, and the increase in the energy consumption of the drying tower is avoided. At the same time, there is no need for staff to enter the tower for cleaning, which saves time for manual cleaning, improves the drying efficiency of the drying tower, and reduces labor costs. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0016] Figure 1 It is a schematic diagram of the overall structure of Embodiment 1 of the present invention; Figure 2 This is a front view of the overall structure of Example 1 of the present invention; Figure 3 This is a cross-sectional view taken along the line A of the present invention; Figure 4 It is a cross-sectional view taken along the line C of the present invention; Figure 5 is a top view of the overall structure of Example 1 of the present invention; Figure 6 The present invention Figure 5B-direction cross-sectional view; Among them, 1. tower body, 2. top induced draft fan, 3. circulating fan, 4. grain collecting hopper on the settling side, 5. first conveying mechanism, 6. second conveying mechanism, 7. grain collecting hopper on the combustion side, 8. angle box, 9. inspection door on the combustion side, 10. inspection door on the settling side, 11. first grain level detection element, 12. second grain level detection element. DETAILED DESCRIPTION

[0017] Example 1 This embodiment provides an internal heat continuous grain drying tower, such as Figure 1-Figure 6 As shown, it includes a tower body 1, in which an angular box 8 is arranged, and a grain inlet is arranged on the top of the angular box 8 for adding grains to be dried into the angular box 8, and a grain unloading mechanism is arranged at the bottom of the angular box 8 for discharging the dried grains from the angular box 8, and a plurality of gas flow channels are arranged in the angular box 8, and the space outside the gas flow channels is used to fill the grains to be dried, and hot air flows through the gas flow channels to dry the grains to be dried, and the angular box and the grain inlet on the top and the grain unloading mechanism on the bottom can adopt the existing technology, and its specific structure will not be described in detail here.

[0018] The space inside the tower body on one side of the angular box 8 is a combustion side for forming hot air with a relatively high temperature, and the space inside the tower body on the other side of the angular box 8 is a settling side.

[0019] A top induced draft fan 2 is installed at the top of the tower body corresponding to the settling side, for generating an airflow from the inside of the tower body to the outside.

[0020] Preferably, two top induced draft fans 2 arranged side by side are installed on the top of the tower body 1 corresponding to the settling side.

[0021] A circulating air duct passes through the bottom of the angular box 8, and a circulating fan 3 is installed in the circulating air duct. The circulating fan 3 is used to generate an airflow from the settling side to the combustion side, thereby realizing the waste heat utilization of high-temperature hot air and reducing energy consumption.

[0022] In this embodiment, in order to prevent the high temperature gas in the combustion side from damaging the circulation fan, the circulation fan 3 is installed at the end of the circulation air duct close to the settling side, so the circulation fan 3 is located at the lower part of the settling side.

[0023] In this embodiment, the circulating fan 3 generates an airflow from the deposition side toward the outside of the tower body, and the circulating fan 3 generates an airflow from the sedimentation side toward the combustion side. The circulating fan 3 and the top induced draft fan 2 work together to enable the gas to circulate between the combustion side, the gas flow channel in the angle box 8, and the sedimentation side. The airflow in the gas flow channel of the angle box 8 flows from the combustion side toward the sedimentation side, and the airflow in the circulating air duct flows from the sedimentation side to the combustion side. When the high-temperature gas flows through the gas flow channel of the angle box 8, the grain accumulated outside the gas flow channel can be dried.

[0024] Furthermore, two circulation air ducts are provided at the bottom of the angular box 8, and correspondingly, two circulation fans 3 are provided in total.

[0025] In this embodiment, no side wall is set at the bottom of the gas flow channel, and the bottom surface of the gas flow channel exposes the grain to be dried. When the air flow passes through the gas flow channel, the grain is easily carried out from the air outlet end of the gas flow channel, thereby accumulating on the sedimentation side, forming fallen grain on the sedimentation side. At the same time, due to the action of the circulating fan 3, the grain and impurities fallen on the sedimentation side are easily sucked to the combustion side through the circulating air duct, forming blown-in grain on the combustion side. When the grain and impurities accumulate in large quantities, they will block the bottom circulating fan duct, reducing the air volume of the circulating fan and increasing the energy consumption of the drying tower.

[0026] In order to solve the above problems, in this embodiment, a sedimentation side grain collecting hopper 4 is set at the bottom of the sedimentation side, and the sedimentation side grain collecting hopper 4 is fixedly connected to the tower body 1. A combustion side grain collecting hopper 7 is set at the bottom of the combustion side, and the combustion side grain collecting hopper 7 is fixedly connected to the tower body 1.

[0027] The grain collecting hopper 4 on the settling side and the grain collecting hopper 7 on the combustion side both adopt an inverted cone structure for collecting grain and impurities, and a grain outlet is provided at the bottom of the grain collecting hopper 4 on the settling side and the grain collecting hopper 7 on the combustion side.

[0028] The sedimentation side grain collecting hopper is provided with a first grain level detection element 11 for detecting the grain level in the sedimentation side grain collecting hopper 4, and the combustion side grain collecting hopper 7 is provided with a second grain level detection element 12 for detecting the grain level in the combustion side grain collecting hopper.

[0029] The installation heights of the first grain level detection element 11 and the second grain level detection element 12 are both lower than the height of the bottom of the circulating air duct.

[0030] In this embodiment, the first grain level detection element 11 and the second grain level detection element 12 both adopt existing rotary-type level sensors. The rotary-type level sensors can use existing equipment, and their specific structures are not described in detail here. The rotary-type level sensors have a component that can actively rotate. When the grain level reaches the rotary-type level sensor, the grain can prevent the rotation of the component, thereby identifying the grain level.

[0031] The first grain level detection element 11 and the second grain level detection element 12 are both connected to a control system and can send signals to the control system.

[0032] The bottom grain outlet of the sedimentation-side grain collecting hopper 4 corresponds to the feeding end of the first conveying mechanism 5 , and the bottom grain outlet of the combustion-side grain collecting hopper 7 corresponds to the feeding end of the second conveying mechanism 6 .

[0033] In this embodiment, the first conveying mechanism 5 and the second conveying mechanism 6 both adopt auger conveyors connected to the control system, the feed pipe 5 of the first conveying mechanism is connected to the bottom grain outlet of the grain collecting hopper 4 on the sedimentation side, and the feed pipe of the second conveying mechanism 6 is connected to the bottom grain outlet of the grain collecting hopper 7 on the combustion side.

[0034] Furthermore, a settlement side maintenance door 10 is provided on the tower body corresponding to the settlement side, which is convenient for staff to enter the settlement side space in the tower body for maintenance, and a combustion side maintenance door 9 is provided on the tower body corresponding to the combustion side, which is convenient for staff to enter the combustion side space in the tower body for maintenance.

[0035] The remaining structures of the internal heat continuous grain drying tower can be made by using the existing technology and will not be described in detail here.

[0036] Example 2 This embodiment provides a working method of the internal heat continuous grain drying tower described in Embodiment 1: The grain to be dried is placed in the angular box 8, and the grain fills the external space of the gas flow channel in the angular box 8. The top induced draft fan 2 and the circulating fan 3 are working, and the high-temperature hot air in the combustion side enters the gas flow channel of the angular box to dry the grain. The gas flowing out of the gas flow channel enters the settling side. Under the action of the circulating fan 3, the air on the settling side enters the combustion side through the circulating flow channel, thereby realizing the reuse of waste heat.

[0037] After the grain in the angular box 8 is dried, the grain is discharged from the angular box 8 by the grain unloading mechanism.

[0038] When the rotary paddle level sensor installed at the bottom grain collecting hopper on the settling side and / or combustion side detects that the grain level in the grain collecting hopper has reached the set grain level, the corresponding auger conveyor is started, and the auger conveyor delivers the grain dropped from the grain collecting hopper to the outside of the tower.

[0039] The grain drying tower of the present embodiment can utilize the conveying mechanism to deliver the grain discharged from the grain outlet when the grain level in the grain collecting hopper reaches the grain level detection element, so that the grain level in the grain collecting hopper will not exceed the height of the grain level detection element, thereby avoiding the blockage of the circulating fan and the circulating air duct due to the accumulation of a large amount of grain and impurities, avoiding the increase of the energy consumption of the drying tower, and also eliminating the need for staff to enter the tower for cleaning, thus saving time for manual cleaning, improving the drying efficiency of the drying tower, and reducing labor costs.

[0040] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An internal heat continuous grain drying tower, comprising a tower body, a horn-shaped box is arranged in the tower body, one side of the horn-shaped box is a combustion side and the other side is a settling side, a top induced draft fan is arranged on the top of the settling side, a circulating air duct is arranged at the bottom of the horn-shaped box, a circulating air duct is installed with a circulating fan, and the characteristic is that: A grain collecting hopper is provided at the bottom of the settling side and the combustion side. The grain collecting hopper is provided with a grain level detection element. The height of the grain level detection element is lower than the circulating air duct. The grain outlet at the bottom of the grain collecting hopper corresponds to the grain inlet end of the conveying mechanism.

2. The internal heat continuous grain drying tower according to claim 1, characterized in that: The grain collecting hopper at the bottom of the settling side adopts an inverted cone-shaped funnel structure, the grain collecting hopper is fixedly connected to the tower body, and a grain outlet is arranged at the bottom of the grain collecting hopper.

3. The internal heat continuous grain drying tower according to claim 1, characterized in that: The grain collecting hopper at the bottom of the combustion side adopts an inverted cone-shaped funnel structure, the grain collecting hopper is fixedly connected to the tower body, and a grain outlet is arranged at the bottom of the grain collecting hopper.

4. The internal heat continuous grain drying tower according to claim 1, characterized in that: The conveying mechanism at the grain outlet of the grain collecting hopper on the sedimentation side adopts an auger conveyor.

5. The internal heat continuous grain drying tower according to claim 1, characterized in that: The conveying mechanism at the grain outlet of the grain collecting hopper on the combustion side adopts an auger conveyor.

6. The internal heat continuous grain drying tower according to claim 1, characterized in that: The grain level detection element adopts a rotary resistance type material level sensor.

7. The internal heat continuous grain drying tower according to claim 1, characterized in that: The tower body portion corresponding to the combustion side is provided with a combustion side inspection door.

8. The internal heat continuous grain drying tower according to claim 1, characterized in that: The tower body portion corresponding to the settlement side is provided with a settlement side inspection door.

9. The internal heat continuous grain drying tower according to claim 1, characterized in that: The circulation fan is arranged at the end of the circulation channel close to the settling side.

10. A method for operating an internal heat continuous grain drying tower according to any one of claims 1 to 9, characterized in that: The top induced draft fan and circulating fan work to drive the hot air to circulate in the flow of the settling side, combustion side and corner box, drying the grain in the corner box. When the grain level detection element installed on the grain collecting hopper at the bottom of the settling side and / or combustion side detects that the grain level in the grain collecting hopper has reached the set grain level, the corresponding conveying mechanism is started, and the conveying mechanism delivers the grain dropped from the grain collecting hopper to the outside of the tower body.

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