A dust removal system for a chemical fertilizer production site pit

Abstract

A kind of chemical fertilizer production pit dust removal system, comprising: underground material dropping module;Automatic batching module for calibrating raw materials input by underground material dropping module;Conveying module for receiving and conveying raw materials calibrated by automatic batching module;Bucket elevator module for vertically lifting raw materials to a specified height, the bucket elevator module has a feed inlet and a pressure relief port, the feed inlet is used to receive the raw materials of conveying module, and the pressure relief port is arranged at the upper end of the bucket elevator module;And air pipe module, including main air pipe and several branch pipes, the main air pipe is arranged in pit layer and maintains negative pressure, and the main air pipe is opened with dust suction port corresponding to the discharge calibration position of automatic batching module;Branch pipe is set as hose, and one end of branch pipe is communicated with main air pipe, and the other end is movably arranged at dust leakage point.The present application directly aims at leakage point by dust suction port branch pipe of main pipe to carry out environmental and fixed-point dust suction, break through single-point dust removal limitation, give consideration to overall dust removal and targeted precision dust capture, greatly improve dust removal effect.

Description

Technical Field

[0001] This application relates to the field of fertilizer production technology, specifically to a dust removal system for fertilizer production pits. Background Technology

[0002] As we all know, fertilizer provides one or more essential nutrients for plants. Fertilizer can improve soil properties and increase soil fertility. Fertilizer is one of the material foundations of agricultural production and plays an important role in the agricultural production process.

[0003] Currently, the raw materials for fertilizer production are generally in powder or granular form. As the core area for raw material transportation, the pit has long faced the problem of dust pollution. Existing fertilizer production lines that produce eucalyptus fertilizer series products need to produce organic fertilizer series products at the same time. Compared with eucalyptus fertilizer, the raw material required for organic fertilizer, humic acid powder, has a lower density and its usage ratio is as high as about 55%.

[0004] Because the facilities for storing and transporting humic acid powder have height differences and pressure differences between the inside and outside of some equipment during the production process, light powder can be sprayed out from the gaps during the transportation of raw materials, resulting in serious dust in the entire pit during production. Since it is a confined space operation, there are great safety hazards. At the same time, excessive dust also affects the operation of relevant personnel and the physical and mental health of employees, and increases the quality risk of the product. Utility Model Content

[0005] This application provides a dust removal system for fertilizer production pits, which can achieve targeted and precise dust collection.

[0006] According to this application, one embodiment provides a dust removal system for fertilizer production pits, comprising: The underground material feeding module has its main trough embedded below the ground, including a feeding port located on the ground. An automatic batching module, located on the first floor of the pit, is used to indicate the raw materials fed into the underground feeding module; The conveying module, located on the second floor of the pit, is used to receive and convey the raw materials calibrated by the automatic batching module; A bucket elevator module is used to vertically lift raw materials to a specified height. The bucket elevator module has a feed inlet and a pressure relief port. The feed inlet is located on the second floor of the pit and is used to receive the raw materials from the conveying module. The pressure relief port is located at the upper end of the bucket elevator module. as well as The duct module includes a main duct and several branch ducts. The main duct is located on the first floor of the pit and maintains negative pressure. The main duct is equipped with a dust suction port at the corresponding feeding position of the automatic batching module. The branch ducts are flexible hoses, with one end connected to the main duct and the other end movably positioned at the dust leakage point.

[0007] In another embodiment, an adjustable dust hood is provided at the end of the branch pipe opposite to the main air duct.

[0008] In another embodiment, the branch pipe is connected to the main air duct via a quick-release connector.

[0009] In another embodiment, the branch pipe is a corrugated flexible hose to adjust the length, and the main air duct is a PU plastic pipe.

[0010] In another embodiment, a fixing member is provided at the end of the branch pipe away from the main duct, and the fixing member is used to restrict the displacement of the moving end of the branch pipe.

[0011] In another embodiment, the bucket elevator module includes an outer shell, an annular traction member, a drive member, and multiple buckets. The annular traction member is disposed within the outer shell, and the multiple buckets are evenly distributed on the annular traction member. The drive member is used to drive the annular traction member to move, and the pressure relief port is disposed at the top of the outer shell.

[0012] In another embodiment, the drive unit includes a variable-pole multi-speed three-phase asynchronous motor with dual speed settings to suit organic fertilizer production or eucalyptus fertilizer production.

[0013] In another embodiment, both the pressure relief port and the rear end of the duct are equipped with cyclone separators.

[0014] In another embodiment, the conveying module includes a conveyor belt assembly and conveyor belt sidewalls disposed on both sides of the conveyor belt assembly. The upper end face of the conveyor belt sidewalls extends beyond the bottom end of the automatic batching module, so that the conveyor belt assembly, the conveyor belt sidewalls, and the metal substrate of the automatic batching module form a closed space.

[0015] In another embodiment, a sealing strip is provided on the inner side of the conveyor belt sidewall, and the conveyor belt sidewall is interference-fitted with the feeding metal substrate of the automatic batching module through the sealing strip.

[0016] According to the above embodiment of the fertilizer production pit dust removal system, during the feeding and calibration process, dust suction ports are opened at multiple locations corresponding to the feeding position through the main pipeline for targeted dust suction. The movable branch pipes are directly aimed at the leakage points, such as the feed inlet of the bucket elevator module, to reduce dust in key dust-raising areas and make it more flexible. When the material is lifted, a pressure relief port is provided for the pressure generated by the rotation of the bucket elevator module to reduce the pressure at the bottom powder inlet of the bucket elevator module, thereby reducing dust generation. This achieves targeted and precise dust collection to adapt to the conveying characteristics of high-dust materials such as humic acid raw powder. Attached Figure Description

[0017] Figure 1 A schematic diagram of the overall layout of the dust removal system for fertilizer production pits; Figure 2 This is a schematic diagram of the main duct and branch ducts in one embodiment; Figure 3 This is a schematic diagram of the pressure relief port on the bucket elevator module in another embodiment; Figure 4 A side view of the delivery module in another embodiment; Figure 5 This is a partial schematic diagram of the bucket elevator module in another embodiment.

[0018] Figure label: 1. Underground material feeding module; 2. Automatic batching module; 21. Feeding channel; 3. Conveying module; 31. Conveyor belt assembly; 32. Conveyor belt sidewall; 33. Sealing strip; 4. Bucket elevator module; 41. Outer casing; 42. Feed inlet; 43. Pressure relief port; 44. Cover plate; 45. Annular traction component; 46. Drive component; 47. Bucket; 5. Duct module; 51. Main duct; 52. Dust extraction port; 53. Branch pipe. Detailed Implementation

[0019] The present application will now be described in further detail with reference to specific embodiments and accompanying drawings. Similar elements in different embodiments are referred to by related similar element reference numerals. In the following embodiments, many details are described to facilitate a better understanding of the present application. However, those skilled in the art will readily recognize that some features may be omitted in different situations, or may be replaced by other elements, materials, or methods. In some cases, certain operations related to the present application are not shown or described in the specification. This is to avoid obscuring the core parts of the present application with excessive description. For those skilled in the art, detailed description of these related operations is not necessary; they can fully understand the related operations based on the description in the specification and general technical knowledge in the art.

[0020] Furthermore, the features, operations, or characteristics described in the specification can be combined in any suitable manner to form various embodiments, and the operational steps involved in each embodiment can also be rearranged or adjusted in a manner that is obvious to those skilled in the art. Therefore, the specification and drawings are only for clearly describing a particular embodiment and do not imply that they represent the necessary components and / or order.

[0021] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages).

[0022] As we all know, fertilizer provides one or more essential nutrients for plants. Fertilizer can improve soil properties and increase soil fertility. Fertilizer is one of the material foundations of agricultural production and plays an important role in the agricultural production process.

[0023] Currently, the raw materials for fertilizer production are generally in powder or granular form. As the core area for raw material transportation, the pit has long faced the problem of dust pollution.

[0024] This embodiment is based on an existing production line. It requires converting the original fertilizer production line (producing eucalyptus fertilizer series products) into one that also produces organic fertilizer series products. Compared to eucalyptus fertilizer, organic fertilizer requires humic acid powder, a raw material with a lower density, and its usage ratio is as high as approximately 55%. However, the following problems exist during the transfer of this raw material: 1. Dust overflow caused by equipment pressure difference: The series of facilities for storing and transporting humic acid raw powder are equipped with drop and pressure difference between the inside and outside of some equipment. During the transportation of raw materials, light powder will spray out from the gaps, resulting in serious dust in the entire pit during production. 2. Multiple leaks are difficult to eliminate: Traditional fixed dust collection pipes cannot cover the equipment inlet and outlet positions, conveyor belt joints, or dynamic leak points caused by accidents.

[0025] Pit systems involve confined space operations, posing significant safety hazards and increasing raw material costs. Furthermore, excessive dust levels can negatively impact the operation of personnel in relevant positions and affect the physical and mental health of employees, while also increasing product quality risks.

[0026] This embodiment provides a dust removal system for fertilizer production pits, which reduces dust overflow caused by height differences and internal and external pressure differences, and can also target and accurately collect dust from accidental dust leak points.

[0027] Please refer to Figure 1 , Figure 2 and Figure 3A dust removal system for a fertilizer production pit includes: an underground material feeding module 1, the main body of which is embedded below the ground and includes a feeding port located on the ground; an automatic batching module 2, located on the first floor of the pit, used to calibrate the raw materials fed into the underground material feeding module 1; a conveying module 3, located on the second floor of the pit, used to receive and convey the raw materials calibrated by the automatic batching module 2; a bucket elevator module 4, used to vertically lift the raw materials to a specified height, the bucket elevator module 4 having a feed inlet 42 and a pressure relief port 43, the feed inlet 42 being located on the second floor of the pit and used to receive the raw materials from the conveying module 3, the pressure relief port 43 being located at the upper end of the bucket elevator module 4; and a duct module 5, including a main duct 51 and several branch pipes 53, the main duct 51 being located on the first floor of the pit and maintaining negative pressure, and each of the main ducts 51 having a dust suction port 52 corresponding to the feeding calibration position of the automatic batching module 2; the branch pipes 53 being flexible hoses, with one end of the branch pipe 53 connected to the main duct 51 and the other end movably located at a dust leakage point.

[0028] For further details, please refer to... Figure 1 and Figure 4 The conveying module 3 includes a conveyor belt assembly 31 and conveyor belt sidewalls 32 disposed on both sides of the conveyor belt assembly 31. The upper end of the conveyor belt sidewalls 32 extends beyond the bottom of the automatic batching module 2, so that the conveyor belt assembly 31, the conveyor belt sidewalls 32 and the metal substrate of the automatic batching module 2 form a closed space.

[0029] In this embodiment, the material undergoes a process of feeding, calibration, transportation, and lifting. During feeding and calibration, dust collection ports 52 are opened at multiple locations corresponding to the feeding points on the main pipeline for targeted dust collection. The movable branch pipes 53 are directly aimed at the leakage points, such as the feed inlet 42 of the bucket elevator module 4, reducing dust in key dust-generating areas and making the process more flexible. During material transportation, the material is always within the sealed space formed by the conveyor belt assembly 31, the conveyor belt sidewalls 32, and the feeding metal substrate of the automatic batching module 2 until it is lifted by the feed inlet 42 of the bucket elevator module 4. When the material is lifted, a pressure relief port 43 is provided to reduce the pressure at the bottom powder inlet of the bucket elevator module 4, thereby reducing dust generation. This achieves targeted and precise dust collection to adapt to the transportation characteristics of high-dust materials such as humic acid raw powder.

[0030] For details, please refer to Figure 1 During production and construction, the underground material feeding module 1 generally adopts a feeding bin. The feeding bin is installed on the first floor, the feeding port at the top of the feeding bin is on the second floor, and the bottom of the feeding bin is embedded below the ground to enter the pit for material feeding and calibration. High-level feeding prevents materials from spilling.

[0031] Please refer to Figure 1The automatic batching module 2 includes multiple sets of weighing units, a feeding mechanism, and a discharge channel 21. In this embodiment, the weighing unit uses a weighing sensor, which is fixed to a steel frame platform on the first floor of the pit, with the discharge port at the lower end of the upper feeding hopper. It is used to calibrate the material, weigh it in real time, and calibrate the material flow rate. The feeding mechanism uses a screw feeder, which is connected to the outlet of the weighing unit through a flange. It is used to convey the calibrated material to the discharge channel 21 and control the discharge rate according to different products. The discharge channel 21 is set as a conical metal cylinder, with its upper end connected to the screw feed outlet of the feeder mechanism and its lower end outlet used to feed material to the conveying module 3.

[0032] Please refer to Figure 1 and Figure 2 In this embodiment, the main air duct 51 is located on the first floor of the pit, and the dust suction port 52 can be set towards the inlet and outlet ports of the automatic batching module 2 to facilitate the removal of overflowing materials. The weighing unit detects the material falling from the feeding hopper, and starts the screw feeder when the set value is reached; the screw feeder is set with different rotation according to different raw materials, and the screw blades rotate to feed the material; the material falls freely into the conveying module 3 through the discharge channel 21.

[0033] Please refer to Figure 4 A sealing strip 33 is provided on the inner side of the conveyor belt sidewall 32, and the conveyor belt sidewall 32 is interference-fitted with the feeding metal substrate of the automatic batching module 2 through the sealing strip 33.

[0034] In this embodiment, the conveyor belt assembly 31 includes a conveyor belt, a support member for supporting the conveyor belt, and a rotating member for driving the conveyor belt to rotate and feed materials. The conveyor belt is located at the lower end of the feeding channel 21 of the automatic batching module 2 to carry the calibrated materials. The conveyor belt sidewall 32 is made of steel plate and is fixed by bolt locking or welding. The sealing strip 33 is made of rubber and is attached to the outside of the feeding channel 21 to enhance the airtightness.

[0035] In this embodiment, the material falls freely through the discharge channel 21 into the enclosed space formed by the conveyor belt, the conveyor belt sidewall 32, and the discharge channel 21 to reduce dust generated by the drop. The material falls from the discharge channel 21 to the center of the conveyor belt, and the accumulation thickness is no higher than the conveyor belt sidewall 32. During the operation of the conveyor belt, the sealing strip 33 is deformed by the pressure outside the discharge channel 21, filling the gaps. The dust is confined within the enclosed space formed by the conveyor belt sidewall 32, reducing dust leakage. Accidentally leaked dust is absorbed through the dust suction port 52.

[0036] Please refer to Figure 1 and Figure 5The bucket elevator module 4 includes an outer shell 41, an annular traction member 45, a drive member 46, and multiple buckets 47. The annular traction member 45 is disposed inside the outer shell 41, and the multiple buckets 47 are evenly distributed on the annular traction member 45. The drive member 46 is used to drive the annular traction member 45 to move. The pressure relief port 43 is disposed at the top of the outer shell 41.

[0037] In this embodiment, the lower end of the outer shell 41 is fixed to the second floor of the pit by a base. The outer shell 41 is provided with the above-mentioned feed inlet 42 at the position of the second floor of the pit. The conveying end point of the conveying module 3 is the feed inlet 42 that enters the bucket elevator module 4.

[0038] Please refer to Figure 1 The drive unit 46 includes a pole-changing multi-speed three-phase asynchronous motor. The pole-changing multi-speed three-phase asynchronous motor has two speed settings to be suitable for organic fertilizer production or eucalyptus fertilizer production. The dual-speed motor adapts to materials of different densities, and the low-speed mode reduces disturbance of light powder materials.

[0039] In one embodiment, the drive unit 46 has a dual-speed mode of 800 rpm and 1200 rpm. When producing organic fertilizer, the drive unit 46 switches to 800 rpm, and the linear speed of the hopper 47 decreases. When producing eucalyptus fertilizer, the motor switches to 1200 rpm, and the linear speed of the hopper 47 increases.

[0040] In one embodiment, please refer to Figure 3 The pressure relief port 43 is provided with a cover plate 44, which is installed on the upper end of the outer casing 41 in an adjustable manner. The size of the pressure relief port 43 can be adjusted by adjusting the cover plate 44.

[0041] In one embodiment, the pressure relief port 43 is equipped with an automatic opening and closing mechanism that automatically opens or closes when the internal pressure of the outer casing 41 reaches a preset value.

[0042] In one embodiment, the pressure relief port 43 is equipped with a cyclone separator. The dust-laden airflow enters the cyclone separator from the pressure relief port 43 to prevent dust from entering the outside air. At the same time, it can be cleaned and reused regularly to reduce material waste and environmental pollution.

[0043] Please refer to Figure 1 and Figure 2 The branch pipe 53 uses a corrugated flexible hose for length adjustment, while the main air duct 51 uses a PU plastic pipe. Specifically, existing air ducts are mostly made of metal, which is prone to corrosion in the pit space, and the air pressure will decrease after a period of use. This embodiment uses a PU plastic pipe, which is lighter and can be set to a larger diameter, increasing the dust removal air pressure and airflow of the entire pit. The added branch pipe 53 is a flexible hose, which can be directly aimed at leak points, such as the feed inlet 42 of the elevator module or other accidental leaks, reducing dust in key dust-generating areas.

[0044] In this embodiment, the main air duct 51 is laid along the ceiling of the first floor of the pit and has branch holes, which are connected to the branch pipe 53. The branch pipe 53 is a corrugated flexible hose, whose length, position, angle and other properties can be adjusted, and it can be flexibly applied to various dust leakage points for precise dust suction.

[0045] In one embodiment, the branch pipe 53 can be directly inserted into the main air duct 51 for connection. The branch pipe 53 and the main air duct 51 can also be connected by quick-release connectors, such as through a tee pipe to achieve branch hole, branch and port clamp connection, adhesive, threaded connection, compression fitting connection, etc., or quick-release connectors with silicone sealing rings and self-locking clips.

[0046] In one embodiment, an adjustable dust hood is provided at the end of the branch pipe 53 opposite to the main air duct 51. The dust hood is configured as a trumpet-shaped cover and is connected to the branch pipe 53 with a universal joint to expand the dust suction port and increase the dust suction range.

[0047] In one embodiment, a fixing member is provided at the end of the branch pipe 53 away from the main air duct 51. The fixing member is used to limit the displacement of the movable end of the branch pipe 53. In this embodiment, the fixing member can be designed as a magnetic base according to the site conditions. Most of the pit equipment is made of metal. The magnetic base can quickly fix the position of the branch pipe 53, thus ensuring the stability of the dust collection of the branch pipe 53.

[0048] In other embodiments, multiple magnetic blocks may be provided along the length of the branch pipe 53 to facilitate the positioning of the hose and prevent the branch pipe 53 from encroaching on the operating space.

[0049] In other embodiments, a negative pressure is generated in the main air duct 51 by a fan at the rear end of the air duct, and a cyclone separator or bag filter is also provided. The operator attaches the dust suction hood to the side wall of the bucket elevator feed port 42 or other leakage location, and the leaked dust is sucked into the branch pipe 53 and enters the bag filter through the main air duct 51. The branch pipe 53 can be disassembled and cleaned at the end of the shift to avoid powder accumulation.

[0050] In this embodiment, based on existing equipment and the pit system, and on the basis of the above implementation plan, the abandoned conveying facilities in the pit are removed, improving the operating environment and expanding the gravity settling space. This embodiment, through the combination of source sealing (conveying module 3), process depressurization (bucket elevator module 4), and end collection (duct module 5), breaks through the limitations of single-point dust removal, taking into account both overall dust removal and targeted precision dust collection, greatly improving the dust removal effect. This facilitates on-site inspection, timely handling of abnormal points, and is beneficial to the control of subsequent processes such as granulation and furnace operation, thus reducing potential quality risks.

[0051] The above-described specific examples are for illustrative purposes only and are not intended to limit the scope of this invention. Those skilled in the art to which this invention pertains can make various simple deductions, modifications, or substitutions based on the concept of this invention.

Claims

1. A dust removal system for fertilizer production pits, characterized in that, include: The underground material feeding module (1) has its main body embedded below the ground, including a feeding port set on the ground; An automatic batching module (2) is installed on the first floor of the pit and is used to mark the raw materials fed into the underground material feeding module (1); The conveying module (3) is located on the second floor of the pit and is used to receive and convey the raw materials calibrated by the automatic batching module (2); Bucket elevator module (4) is used to vertically lift raw materials to a specified height. The bucket elevator module (4) has a feed inlet (42) and a pressure relief port (43). The feed inlet (42) is located on the second floor of the pit and is used to receive the raw materials from the conveying module (3). The pressure relief port (43) is located at the upper end of the bucket elevator module (4). as well as The air duct module (5) includes a main air duct (51) and several branch pipes (53). The main air duct (51) is set on the first floor of the pit and maintains negative pressure. The main air duct (51) is provided with a dust suction port (52) at the feeding position of the automatic batching module (2). The branch pipes (53) are set as flexible hoses. One end of the branch pipe (53) is connected to the main air duct (51), and the other end is movably set at the dust leakage point.

2. The dust removal system for fertilizer production pits as described in claim 1, characterized in that, An adjustable dust hood is provided at the end of the branch pipe (53) away from the main air pipe (51).

3. The dust removal system for fertilizer production pits as described in claim 1, characterized in that, The branch pipe (53) is connected to the main air pipe (51) via a quick-release connector.

4. The dust removal system for fertilizer production pits as described in claim 1, characterized in that, The branch pipe (53) is made of corrugated flexible hose to adjust the length, and the main air duct (51) is made of PU plastic pipe.

5. The dust removal system for fertilizer production pits as described in claim 1, characterized in that, The branch pipe (53) is provided with a fixing member at the end opposite to the main air pipe (51), and the fixing member is used to restrict the displacement of the moving end of the branch pipe (53).

6. The dust removal system for fertilizer production pits as described in any one of claims 1-5, characterized in that, The bucket elevator module (4) includes an outer shell (41), an annular traction member (45), a drive member (46), and multiple buckets (47). The annular traction member (45) is disposed inside the outer shell (41), and the multiple buckets (47) are evenly distributed on the annular traction member (45). The drive member (46) is used to drive the annular traction member (45) to move. The pressure relief port (43) is disposed at the top of the outer shell (41).

7. The dust removal system for fertilizer production pits as described in claim 6, characterized in that, The drive unit (46) includes a variable-pole multi-speed three-phase asynchronous motor, which has two speed settings to be suitable for organic fertilizer production or eucalyptus fertilizer production.

8. The dust removal system for fertilizer production pits as described in claim 6, characterized in that, Both the pressure relief port (43) and the rear end of the air duct are equipped with cyclone separators.

9. The dust removal system for fertilizer production pits as described in claim 1, characterized in that, The conveying module (3) includes a conveyor belt assembly (31) and conveyor belt sidewalls (32) disposed on both sides of the conveyor belt assembly (31). The upper end of the conveyor belt sidewalls (32) extends beyond the bottom of the automatic batching module (2) to form a closed space with the conveyor belt assembly (31), the conveyor belt sidewalls (32) and the metal substrate of the automatic batching module (2).

10. The dust removal system for fertilizer production pits as described in claim 9, characterized in that, A sealing strip (33) is provided on the inner side of the conveyor belt sidewall (32), and the conveyor belt sidewall (32) is interference-fitted with the feeding metal substrate of the automatic batching module (2) through the sealing strip (33).

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