Organic fertilizer raw material screening device

Abstract

The utility model provides an organic fertilizer raw material screening device which comprises a box body and a screening cylinder arranged in the box body, a feeding channel and a discharging channel are arranged in the box body corresponding to the upper portion and the lower portion of the screening cylinder respectively, the screening cylinder is of a cylindrical structure arranged in a horizontally rotating mode, and screening holes and a cabin door capable of being opened and closed are arranged on the arc-shaped side face. Two horizontal air channels are further arranged on the side face, corresponding to the screening barrel, of the box body, and a fan facing the interior of the box body is arranged on one air channel. According to the utility model, the fiber strips are stripped out under the action of wind power, so that the screening effect is improved, and the problem that the subsequent granulation is influenced by the fiber strips is avoided. And meanwhile, compared with traditional winnowing, loss of small-particle materials can be avoided, and the problem that the screening result is affected due to the fact that light fiber strips float and fly around in the screening cavity is solved.

Description

Technical Field

[0001] This utility model relates to the field of organic fertilizer production technology, and in particular to an organic fertilizer raw material screening device. Background Technology

[0002] Chemical fertilizers have laid the material foundation for the development of modern agriculture and the protection of human food security. However, the low utilization rate of chemical fertilizers and the resulting high environmental risks have always been major problems plaguing the world. Currently, due to the increase in agricultural and fertilizer use worldwide, the dependence on pesticides and fertilizers is increasing, resulting in a series of problems such as insufficient use of organic fertilizers, imbalance of soil nutrient ratios, soil compaction, decline in soil quality, and pollution of rivers and groundwater.

[0003] Therefore, the importance of organic fertilizer is increasing daily. Organic fertilizer is a product containing both the nutrients needed by crops and microorganisms; it is a combination of biological, organic, and inorganic components. It can replace chemical fertilizers, providing various nutrients needed for crop growth and development. Through the use of organic fertilizers, we can gradually reduce or eliminate the use of chemical fertilizers in farmland, replacing them with organic fertilizers, thereby reducing environmental damage.

[0004] Bio-organic fertilizers are high in organic matter, which can improve soil, enhance its physical and chemical properties, and increase its water retention, fertilizer retention, and nutrient supply capabilities, thus alleviating soil compaction caused by long-term use of chemical fertilizers. Organic fertilizer raw materials include various organic substances such as livestock and poultry manure, crop straw, urban waste, and mushroom residue. Each raw material has its unique characteristics, advantages, and disadvantages; selecting the optimal combination of raw materials can produce high-quality organic fertilizer. Currently, the conventional organic fertilizer production process mainly includes steps such as batching, crushing, mixing, granulation, spheroidizing, and drying.

[0005] After crushing, the material needs to be screened to remove any substandard parts before mixing and granulation. However, because organic fertilizer raw materials include straw, plant stems and leaves containing plant fibers, some small plant fiber strands remain after crushing. These fiber strands affect the tightness of the granulation and therefore need to be screened out. However, these fiber strands are small in size and have a certain degree of flexibility, so they can pass through ordinary sieves, making it difficult to remove them from the powdery raw material. Utility Model Content

[0006] To address the shortcomings of existing technologies, this utility model provides an organic fertilizer raw material screening device, which solves the problem that ordinary screens are unable to screen out the fine plant fiber strips contained in organic fertilizer raw materials, thus affecting the subsequent granulation effect.

[0007] According to an embodiment of the present invention, an organic fertilizer raw material screening device includes a box and a screening cylinder disposed inside the box. The box has a vertical square structure and a support member is provided at the bottom of the box. The box has a horizontal cylindrical cavity for the screening cylinder to be installed in the cavity. The box has an inlet channel and an outlet channel respectively provided above and below the screening cylinder. The top of the inlet channel is connected to the top surface of the box, and the bottom of the outlet channel is connected to the bottom surface of the box.

[0008] The screening cylinder is a horizontally rotating cylindrical structure with closed end faces and screen holes on its arc-shaped side. The arc-shaped side of the screening cylinder also has an openable and closable door. The box body is also provided with two horizontal air ducts on the side of the screening cylinder. The air ducts are symmetrically arranged with respect to the central axis of the screening cylinder and are perpendicular to the central axis of the screening cylinder. One of the air ducts is provided with a fan facing the inside of the box body.

[0009] Furthermore, the screening cylinder has coaxial rotating shafts on both ends facing outwards. The rotating shafts are fixedly connected to the screening cylinder and are rotatably mounted on the inner wall of the box. The box is also equipped with a motor to drive the rotating shafts to rotate.

[0010] Furthermore, the hatch has two doors, both of which are arc-shaped structures and are arranged side by side on the side of the screening cylinder. The edges of the hatches are rotatably connected to the edges of the end faces of the screening cylinder, so that the hatches can rotate along the rotating surface passing through the central axis of the screening cylinder.

[0011] Furthermore, the fan has two fans arranged opposite each other on both sides of the air duct. The outer side of the box is provided with an outwardly extending support plate. A vertical telescopic rod is installed at the bottom of the support plate. The bottom end of the telescopic rod is fixedly connected to the fan, thereby driving the fan to move in the vertical direction. The movement path of the fan passes through the end of the air duct.

[0012] Furthermore, the fan is provided with a vertical enclosed shell, which covers the fan's movement path and is fixedly connected to the outer side of the casing. A material collection hopper is also provided at the bottom of the enclosed shell.

[0013] Furthermore, the fan is horizontally positioned, and the fan's outlet airflow direction is parallel to the duct direction.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] In this invention, a screening cylinder is placed inside a housing, with two horizontally opposite air ducts corresponding to the housing. A fan is then installed in each air duct facing the screening cylinder. Therefore, during the rotation and screening process, the screening cylinder is continuously exposed to airflow from the fan. Because the internal fiber strips are low in density and lightweight, they pass through the screen holes of the screening cylinder under the force of the airflow and are discharged through the opposite air duct. Meanwhile, the denser granular organic fertilizer raw materials fall from the bottom of the screening cylinder and exit through the discharge channel. This method achieves screening of materials of different densities in two directions, separating the fiber strips, improving the screening effect, and preventing the fiber strips from affecting subsequent granulation. Furthermore, compared to traditional air classification, it avoids the loss of small particles and eliminates the problem of light fiber strips floating and flying around inside the screening chamber, affecting the screening results. Attached Figure Description

[0016] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0017] Figure 2 This is a schematic diagram of the screening cylinder in an embodiment of the present invention.

[0018] In the above attached diagram: 1. Box body; 2. Screening cylinder; 3. Fan; 4. Telescopic rod; 5. Enclosed shell; 11. Feeding channel; 12. Discharge channel; 13. Supporting leg; 21. Rotating shaft; 22. Door; 23. Drive component; 51. Collection funnel. Detailed Implementation

[0019] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0020] like Figure 1 As shown in the figure, this utility model embodiment proposes an organic fertilizer raw material screening device, including a box body 1 and a screening cylinder 2 disposed inside the box body 1. In this embodiment, the box body 1 is a vertical cuboid structure, and support feet 13 are provided at the four corners of the bottom of the box body 1 to support the entire box body 1 off the ground. The box body 1 has a horizontal cylindrical cavity for the screening cylinder 2 to be installed in the cavity. The box body 1 has a feeding channel 11 above and a discharging channel 12 below the screening cylinder 2, respectively. The top end of the feeding channel 11 is connected to the top surface of the box body 1, and the bottom end of the discharging channel 12 is connected to the bottom surface of the box body 1. Preferably, a feeding funnel can be provided at the top of the box body 1 and connected to the feeding channel 11 to better add organic fertilizer raw materials.

[0021] like Figure 2As shown, the screening cylinder 2 is a horizontally rotating cylindrical structure. Both ends of the screening cylinder 2 are closed, and screen holes are provided on its arc-shaped side surface. Coaxial rotating shafts 21 are arranged on both ends of the screening cylinder 2 facing outwards. The rotating shafts 21 are fixedly connected to the screening cylinder 2 and rotatably mounted on the inner wall of the housing 1. A motor is also installed inside the housing 1 to drive the rotating shafts 21 to rotate. An openable and closable door 22 is also provided on the arc-shaped side surface of the screening cylinder 2, allowing the raw material to be screened to be added through the door 22 corresponding to the feed channel 11 before screening begins. Preferably, there are two doors 22, both of which are arc-shaped structures with an arc degree less than 180 degrees, arranged side-by-side on the side surface of the screening cylinder 2. The edges of the doors 22 are rotatably connected to the edges of the end faces of the screening cylinder 2, allowing the doors 22 to rotate along a rotating surface passing through the central axis of the screening cylinder 2. In this embodiment, a drive unit 23 is provided on the end face of the screening cylinder 2 corresponding to the hatch 22, so that the two hatches 22 can rotate relative to each other to open or close the side of the screening cylinder 2.

[0022] The box body 1 is also provided with two horizontal air ducts on the side corresponding to the screening cylinder 2. The air ducts are symmetrically arranged with respect to the central axis of the screening cylinder 2 and are perpendicular to the central axis of the screening cylinder 2. One of the air ducts is equipped with a fan 3 facing the inside of the box body 1. During the rotation and screening process, the screening cylinder 2 is continuously blown by the fan 3. Because the fiber strips inside have low density and light weight, they pass through the screen holes of the screening cylinder 2 under the action of the wind and are discharged from the opposite air duct. The denser granular organic fertilizer raw materials fall from the bottom of the screening cylinder 2 and leave through the discharge channel 12.

[0023] In this preferred embodiment, the blower 3 has two fans arranged opposite each other on both sides of the air duct of the housing 1. The outer side of the housing 1 has an outwardly extending support plate, and a vertical telescopic rod 4 is installed at the bottom of the support plate. The bottom end of the telescopic rod 4 is fixedly connected to the blower 3, thereby driving the blower 3 to move vertically, and the movement path of the blower 3 passes through the end of the air duct. The blower 3 is horizontally positioned, and the airflow direction of the blower 3 is parallel to the direction of the air duct. Driven by the telescopic rod 4, the blower 3 can be aligned with the air duct or raised above the air duct, thereby opening the end face of the air duct on its side. Furthermore, a vertical enclosed shell 5 is provided outside the blower 3. The enclosed shell 5 covers the movement path of the blower 3 and is fixedly connected to the outer side of the housing 1. A material collection funnel 51 is also provided at the bottom of the enclosed shell 5.

[0024] In this embodiment, during operation, the screening cylinder 2 is first rotated so that its door 22 faces upward. The door 22 is opened, and the crushed organic fertilizer raw material is added through the feed channel 11. Then, the door 22 is closed, and the screening cylinder 2 begins to rotate for screening. During this process, the blowers 3 on both sides are driven by the telescopic rod 4 to alternately align with the air duct, meaning that only one blower 3 is aligned with the air duct at a time, while the other blower 3 opens its corresponding end of the air duct. This allows the blower 3 to blow out the fine fiber strips remaining in the organic fertilizer raw material through the screen holes of the screening cylinder 2, and then leave the housing 1 through the air duct on the other side. Finally, they are collected by the closed shell 5 and the collection funnel 51 for reprocessing or centralized treatment. The qualified organic fertilizer raw material in small particles is discharged through the discharge channel 12 and collected to enter the next granulation step. After screening, the screening cylinder 2 is rotated so that the door 22 faces downward, and the door 22 is opened to discharge any large particles that may remain, thus allowing for recycling and reprocessing.

[0025] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An organic fertilizer raw material screening device, characterized in that: The device includes a housing and a screening cylinder disposed inside the housing. The housing has a vertical square structure and a support member at the bottom. The housing has a horizontal cylindrical cavity for the screening cylinder to be installed in the cavity. The housing has an inlet channel and an outlet channel above and below the screening cylinder, respectively. The top of the inlet channel is connected to the top surface of the housing, and the bottom of the outlet channel is connected to the bottom surface of the housing. The screening cylinder is a horizontally rotating cylindrical structure with closed end faces and screen holes on its arc-shaped side. The arc-shaped side of the screening cylinder also has an openable and closable door. The box body is also provided with two horizontal air ducts on the side of the screening cylinder. The air ducts are symmetrically arranged with respect to the central axis of the screening cylinder and are perpendicular to the central axis of the screening cylinder. One of the air ducts is provided with a fan facing the inside of the box body.

2. The organic fertilizer raw material screening device as described in claim 1, characterized in that: The screening cylinder has coaxial rotating shafts on both ends facing outwards. The rotating shafts are fixedly connected to the screening cylinder and are rotatably mounted on the inner wall of the box. The box is also equipped with a motor to drive the rotating shafts to rotate.

3. The organic fertilizer raw material screening device as described in claim 1, characterized in that: The chamber has two doors, both of which are arc-shaped structures and are arranged side by side on the side of the screening cylinder. The edges of the doors are rotatably connected to the edges of the end face of the screening cylinder, so that the doors can rotate along the rotating surface passing through the central axis of the screening cylinder.

4. The organic fertilizer raw material screening device as described in claim 1, characterized in that: The fan has two fans arranged opposite each other on both sides of the air duct. The outer side of the box has an outwardly extending support plate. A vertical telescopic rod is installed at the bottom of the support plate. The bottom end of the telescopic rod is fixedly connected to the fan, thereby driving the fan to move in the vertical direction. The fan's movement path passes through the end of the air duct.

5. The organic fertilizer raw material screening device as described in claim 4, characterized in that: The fan is provided with a vertical enclosed shell, which covers the fan's movement path and is fixedly connected to the outer side of the casing. A material collection hopper is also provided at the bottom of the enclosed shell.

6. The organic fertilizer raw material screening device as described in claim 4, characterized in that: The fan is set horizontally, and the air outlet direction of the fan is parallel to the direction of the air duct.

Images