Bio-organic fertilizer feeding and drying device

Abstract

The utility model discloses a bio-organic fertilizer feeding and drying device which is applied to the field of bio-organic fertilizer manufacturing, a spiral feeding device is transformed, a hollow shaft of the spiral feeding device is connected with an air supply pipeline through a rotary sealer, and a heating box internally provided with a resistance wire and a drying chamber internally provided with a drying box are installed on the air supply pipeline. The hollow shaft is fixedly provided with the spiral blade, the spiral blade is fixedly provided with the stirring rods, and the number of the stirring rods is 2-4 and the stirring rods are uniformly distributed on the periphery of the spiral blade. The hollow shaft is provided with an air supply hole or provided with a vent plug, and blown air can directly air-dry organic fertilizer particles. Organic fertilizer particles are stirred and dried in the conveying process, a special heating furnace and drying equipment are omitted, the occupied area and investment are reduced, the surfaces of the particles are directly air-dried, and the drying efficiency is improved.

Description

Technical Field

[0001] This utility model applies to the field of bio-organic fertilizer manufacturing, and relates to drying after organic fertilizer granulation, specifically a device for drying during the feeding process. Background Technology

[0002] Granular bio-organic fertilizer facilitates uniform soil absorption. Furthermore, the addition of nitrogen, phosphorus, potassium, and trace elements to the organic fertilizer creates a product that both improves soil and provides nutrients. The production steps for this type of organic fertilizer include fermentation and drying of the bio-raw material, crushing, batching, mixing, granulation, drying, sieving, and packaging. Crushing involves breaking the dried bio-raw material into fine particles to prepare the size for subsequent granulation. Batching involves adding nitrogen, phosphorus, potassium, and trace elements to the bio-raw material granules, mixing them evenly, then moistening and extruding them into granules. After granulation, the granules are dried and sieved to form a finished organic fertilizer product with uniform particle size. Currently available organic fertilizer drying equipment includes a heating furnace and a drum unit. The heating furnace provides hot air for drying, which is then fed into the drum. The rotation of the drum causes the organic fertilizer particles to tumble, and the hot air heats the drum while the airflow dries the organic fertilizer particles. This drying method is inefficient, energy-intensive, requires large equipment investment, and occupies a large area.

[0003] Numerous patent applications relate to organic fertilizer drying devices, such as CN211316841U, a drying device for preparing organic fertilizer from poultry manure; CN218566010U, a high-efficiency earthworm castings organic fertilizer drying equipment; and CN221005780U, a drying device for processing livestock and poultry manure organic fertilizer. CN110317085A discloses a rapid drying device for preparing bio-organic fertilizer. Hot air enters the rotating shaft through an adapter. The rotating shaft is connected to the inner cavity of a scraper through a branch pipe, allowing the hot air to be sprayed into the inner chamber through nozzles on the scraper. Multiple nozzles spray crosswise, while a spiral turning rod continuously stirs and turns the organic fertilizer, ensuring it fully contacts the hot air for drying. All of the above patent solutions involve periodic drying and are not suitable for continuous drying of organic fertilizer. CN107726775A discloses a livestock and poultry manure recycled organic fertilizer drying device, whose combustion boiler is equivalent to the aforementioned heating furnace, and whose drying drum is equivalent to the aforementioned drum device. Utility Model Content

[0004] The technical problem solved by this invention is to modify the spiral feeding device for bio-organic fertilizer, so as to achieve continuous drying of organic fertilizer granules while feeding, eliminating the need for dedicated drying equipment and heating furnaces, thus saving floor space and equipment investment. Direct air drying onto the granule surface results in high drying efficiency and energy savings.

[0005] The technical solution adopted in this utility model is as follows: the bio-organic fertilizer feeding and drying device includes an air supply duct and a spiral feeding device, the air supply duct being connected to a blower. The spiral feeding device includes a spiral feeding bin and a rotating component inside the bin. The rotating component includes spiral blades, a hollow shaft, and a stirring rod. The spiral blades are fixedly installed on the hollow shaft, and the stirring rods are fixedly installed on the spiral blades, and are evenly distributed around the spiral blades, preferably in numbers of 2-4. Air supply holes are machined on the hollow shaft or vent plugs are installed thereon. One end of the hollow shaft is sealed, and the other end is connected to a rotating seal, through which the air supply duct is connected.

[0006] Furthermore, to increase drying efficiency, the air supply hole or vent plug is provided on the spiral blade.

[0007] Furthermore, to prevent dust pollution of the work area, the spiral feeding hopper is covered by a hopper cover, with a feed inlet at the upper rear end of the hopper cover and a discharge outlet at the lower front end of the spiral feeding hopper.

[0008] Furthermore, to increase the temperature of the supplied air, a heating box is installed on the air supply duct, and a resistance wire is installed inside the heating box. To improve the heating efficiency of the air, the resistance wire is wound into staggered triangular or elliptical shapes.

[0009] Furthermore, to reduce air humidity, a moisture absorption chamber is provided on the air supply duct, through which air enters the heating box; a pluggable drying box is provided inside the moisture absorption chamber, in which drying granules are placed, and filters are provided on both sides of the ventilation of the drying box.

[0010] Furthermore, a gear or sprocket is fixedly installed at one end of the hollow shaft extending from the spiral feed bin, and the gear or sprocket is connected to the drive device through gear transmission or chain transmission.

[0011] The beneficial effects of this utility model are: this utility model is a modification of the screw feeding device, which eliminates the need for a dedicated heating furnace and drying equipment, reducing the equipment footprint and investment; it uses flowing air for direct drying, which improves drying efficiency; and the temperature and humidity of the air can be controlled separately according to the season and environment. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the main structure of Example 1;

[0013] Figure 2 for Figure 1 AA sectional view;

[0014] Figure 3 This is a schematic diagram of a resistance wire winding structure;

[0015] Figure 4 This is a schematic diagram of the air duct in Example 2;

[0016] Figure 5 This is a schematic diagram of the air supply hole configuration in Example 2;

[0017] Among them: 1-Heating box, 2-Rotating sealer, 3-Gear, 4-Bearing component, 5-Spiral feed hopper, 6-Spiral blade, 7-Hollow shaft, 8-Air outlet, 9-Discharge port, 10-Hybrid cover, 11-Stirring rod, 12-Feed inlet, 13-Resistance wire, 14-Insulation layer, 15-Moisture absorption chamber, 16-Dried granules. Detailed Implementation

[0018] For simplified illustration, the screw feeder drive, resistance wire power supply mechanism, and blower are existing technologies and are not shown in the attached drawings. The rotary sealer is optional depending on the pipe diameter; the dried granules are purchased externally. In the attached drawings, solid arrows indicate the direction of organic fertilizer flow, and dashed arrows indicate the direction of air flow. The following "before and after" refers to the direction of organic fertilizer flow. Figure 1 The left side is the back, and the right side is the front. Example 1

[0019] The structure of the feeding and drying device in this embodiment is shown in the attached figure. Figure 1 and 2 As shown, it includes an air supply device and a screw feeder. The air supply device includes a blower and an air supply duct. A heating box 1 is installed on the air supply duct, and a resistance wire 13 is installed inside the heating box 1. When air flows through the heating box, the electrically heated high-temperature resistance wire 13 can heat the air to 40℃-80℃. The temperature of the heated air is controlled by controlling the air flow rate and the power supply. To increase the contact area between the resistance wire and the air, the resistance wire is preferably wound into staggered triangular or elliptical shapes, as shown in the attached diagram. Figure 3 As shown in the attached diagram, the resistance wires on the outside of the triangles or ellipses are wound connection sections. To prevent the hot air from cooling down, an insulation layer 14 is placed over the heating box and the air supply duct.

[0020] The screw feeding device includes a screw feeding bin 5 and a rotating component inside the bin. The rotating component includes screw blades 6, a hollow shaft 7, and stirring rods 11. The screw blades 6 are fixedly mounted on the hollow shaft 7, and the stirring rods 11 are fixedly mounted on the screw blades 6. Two to four stirring rods are evenly distributed around the periphery of the screw blades 6. Figure 2 As shown, this embodiment has three bearings. Bearing components 4 are installed at both ends of the spiral feed hopper 5, and these bearing components 4 are rotatably connected to the hollow shaft 7 bearings. One end of the hollow shaft 7 is sealed, and the other end is connected to a rotating seal 2. The rotating seal 2 connects to an air supply duct, achieving a sealed connection between the fixed air supply duct and the rotating hollow shaft 7. At the end of the hollow shaft 7 extending out of the spiral feed hopper 5, a gear 3 or sprocket is fixedly installed. The gear 3 or sprocket is connected to a drive device, which drives the rotation of the hollow shaft through gear transmission or chain transmission.

[0021] The hollow shaft 7 has air inlets 8 machined on it. For ease of machining, a larger through hole can be machined on the hollow shaft 7, and an air plug can be fixedly installed in the through hole with an interference fit. In this way, small particles will not fall into the hollow shaft, and the gas in the hollow shaft can also blow out the particles that enter the air inlets, thus preventing small particles or microparticles from entering the hollow shaft.

[0022] The screw feeder hopper 5 is covered by a hopper cover 10. A feed inlet 12 is located at the upper rear end of the hopper cover 10, and a discharge outlet 9 is located at the lower front end of the screw feeder hopper 5. Covering the screw feeder hopper with a hopper cover serves two purposes: ensuring safe production and preventing the blown particles from forming dust and polluting the environment. Dust collection ports are installed at the feed inlet and discharge outlet where particles fall, removing the blown particulate dust and purifying the workshop working environment.

[0023] In this embodiment, the blower and drive unit are started. Air enters the hollow shaft 7 through the heating box, air supply pipe, and rotating seal 2, and is then blown into the screw feed hopper through the air supply holes on the hollow shaft. The drive unit drives the rotating parts inside the hopper to rotate. The granulated organic fertilizer granules fall into the screw feed hopper 5 from the feed inlet 12. The rotating spiral blades 6 push the organic fertilizer granules from the rear end of the hopper to the front end, while the stirring rod 11 agitates the organic fertilizer granules. Since the hollow shaft with air supply holes is embedded in the organic fertilizer granules inside the screw feed hopper, the air blown out from the air supply holes can directly dry the organic fertilizer granules. The air flowing on the surface of the organic fertilizer granules helps to increase the concentration gradient of moisture diffusion inside the granules, promotes the diffusion of moisture inside the granules, and accelerates the drying process. In cold winters, due to the low air temperature, the resistance wire in the heating box can be energized to heat the air, and the temperature is conducive to increasing the rate of moisture diffusion. In summer, the air can be dried directly without heating. Example 2

[0024] The drying of organic fertilizer granules is primarily determined by air humidity. Humidity determines the concentration gradient of moisture diffusion within the granules and is the main factor in granule drying, while temperature affects the rate of moisture diffusion and is a secondary factor. Therefore, during the rainy season, a moisture absorption chamber 15 is installed in the air supply duct, as shown in the attached diagram. Figure 4 As shown, the air supplied by the blower enters the heating chamber 1 through the moisture absorption chamber 15. Inside the moisture absorption chamber 15, a removable drying box is installed, containing drying granules 16. The drying box has filters on both sides for ventilation. Air enters the drying box through one filter, is dried by the drying granules, and then exits through the other filter as dry air before entering the heating chamber for heating. When the air is dry, only an empty drying box needs to be installed.

[0025] This embodiment includes two drying boxes inside the drying chamber. 1) This facilitates replacement; one box operates while the other is removed for heat treatment to restore its drying activity. 2) It enhances the drying function. More than two boxes can also be used, depending on the airflow and the size of the drying boxes.

[0026] The desiccant chamber and heating box are independent and can be adjusted according to the season and air humidity to ensure that the air humidity for drying organic fertilizer granules is 20%-40% and the temperature is 30℃-60℃. Example 3

[0027] To increase the contact area between the organic fertilizer granules and the dry air, in this embodiment, the air outlet 8 or the air vent plug is installed on the spiral blade 6, as shown in the attached figure. Figure 5 As shown, the spiral blade 6 is hollow and connected to the hollow shaft 7. Air from the hollow shaft flows into the central cavity of the spiral blade 6 and is then blown out through the air inlet or vent plug. In this way, the spiral blade can directly dry the particles while propelling them forward. However, the height of the particles in the spiral feed hopper should be sufficient to submerge the spiral blade to prevent particles from leaking out of the air inlet or vent plug and causing an air short circuit.

[0028] Air supply holes or vent plugs can also be installed on both the hollow shaft and the spiral blades.

[0029] Compared with Example 1, although the manufacturing cost of the spiral blades is higher, the surface area of ​​the air-dried organic fertilizer granules is large and the drying speed is fast, making it suitable for drying organic fertilizer granules in large-scale production.

[0030] Compared with existing drying equipment, this utility model is modified from the screw feeding device. 1) It eliminates the need for heating furnace and dedicated drying equipment, reducing the equipment footprint and investment; 2) The flowing air directly dries the organic fertilizer particles, improving drying efficiency and saving operating and production costs; 3) The control of the drying air is more convenient, and the temperature and humidity of the air can be controlled separately according to the season and environment.

Claims

1. A biological organic fertilizer feeding and drying device, comprising an air supply duct and a screw feeding device, wherein the screw feeding device includes a screw feeding bin and rotating components within the bin, characterized in that: The rotating component includes a spiral blade (6), a hollow shaft (7), and a stirring rod (11); the spiral blade (6) is fixedly installed on the hollow shaft (7), and the stirring rod (11) is fixedly installed on the spiral blade (6) and is evenly distributed around the spiral blade; the hollow shaft (7) is machined with air supply holes or installed with vent plugs, and one end of the hollow shaft (7) is sealed, and the other end is connected to a rotating seal (2), and the air supply pipe is connected through the rotating seal (2).

2. The biological organic fertilizer feeding and drying device according to claim 1, characterized in that: The air supply hole or vent plug is provided on the spiral blade (6).

3. A bio-organic fertilizer feeding and drying device according to claim 1 or 2, characterized in that: The spiral feed hopper is covered by a hopper cover (10), with an inlet at the upper rear end of the hopper cover (10) and an outlet at the lower front end of the spiral feed hopper.

4. A bio-organic fertilizer feeding and drying device according to claim 1 or 2, characterized in that: The number of stirring rods (11) is 2-4.

5. A bio-organic fertilizer feeding and drying device according to claim 1 or 2, characterized in that: A heating box is installed on the air supply duct, and a resistance wire is installed inside the heating box.

6. The biological organic fertilizer feeding and drying device according to claim 5, characterized in that: The resistance wires are wound into staggered triangles or ellipses.

7. The biological organic fertilizer feeding and drying device according to claim 5, characterized in that: A moisture absorption chamber is provided on the air supply duct, through which air enters the heating box; a pluggable drying box is provided inside the moisture absorption chamber, in which drying granules are placed, and the ventilation sides of the drying box are filters.

8. A bio-organic fertilizer feeding and drying device according to claim 1 or 2, characterized in that: The hollow shaft (7) extends out of one end of the spiral feeding bin and is fixedly installed with a gear or sprocket. The gear or sprocket is connected to the drive device through gear transmission or chain transmission.

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