Spiral conveying device for granular fertilizer production
By introducing a tapered cyclone separation section and a guide rib structure into the screw conveyor, combined with an inverted trapezoidal dust collection box and a pulse bag filter, the problem of dust separation and collection difficulties in fertilizer production has been solved, achieving efficient and environmentally friendly dust treatment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-14
- Publication Date
- 2026-03-27
AI Technical Summary
Existing screw conveyor devices cannot effectively separate and collect dust in fertilizer production, affecting product cleanliness and the environment. Furthermore, existing dust treatment structures are inefficient and occupy a large amount of space, failing to meet the needs of modern production.
A cyclone separation section with a tapered cylindrical structure was designed, combined with a spiral conveying device that increases the height of the spiral blades and reduces the pitch. It is equipped with a guide rib and an inverted trapezoidal dust collection box. The dust separation efficiency is improved by using centrifugal force and the guide structure, and efficient collection is achieved through a pulse bag filter.
It improves dust separation efficiency, reduces the probability of equipment blockage, ensures the cleanliness of fertilizer products and the cleanliness of the production environment, and meets the requirements of efficient, environmentally friendly and energy-saving modern production.
Smart Images
Figure CN224046235U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to granular fertilizer production technical field, more particularly to a kind of spiral conveying device for granular fertilizer production. BACKGROUND
[0002] In the production process of chemical fertilizer, spiral conveying device is commonly used material conveying equipment.However, the existing spiral conveying device when conveying chemical fertilizer, often cannot effectively solve the separation and collection problem of dust in chemical fertilizer.On the one hand, dust will be discharged with chemical fertilizer, affect the cleanliness and quality of chemical fertilizer product;On the other hand, the emission of dust will also cause pollution to production environment, harm the health of operating personnel.
[0003] In addition, some dust handling structure of the prior art, there is separation and collection efficiency, space occupation big etc. UTILITY MODEL CONTENT
[0004] To solve the above problems, overcome the deficiencies of prior art, the utility model provides a kind of spiral conveying device for granular fertilizer production;
[0005] The first technical problem solved is: dust separation effect is poor, collection is difficult and space occupation is big etc.
[0006] The specific technical scheme that the utility model solves above technical problem is as follows: a kind of spiral conveying device for granular fertilizer production, including spiral conveyor, the spiral conveyor includes conveying pipe, spiral shaft, drive motor, feed hopper and discharge pipe;
[0007] The conveying pipe is divided into feed section, cyclone separation section and discharge section along the axis direction in sequence, the cyclone separation section is tapered cylinder structure, and its two ends are connected with feed section and discharge section with equal diameter;The height of spiral blade in the cyclone separation section is greater than the height of spiral blade in feed section and discharge section, and the pitch of spiral blade is less than the pitch of spiral blade in feed section and discharge section;
[0008] The bottom of the conveying pipe of the cyclone separation section is provided with dust collection box, the dust collection box is communicated with conveying pipe by dust discharge port, and ash discharge port is formed in the bottom of dust collection box.
[0009] Further, the diameter of the cyclone separation section gradually decreases from both ends to the middle, forming a gradual structure with the smallest middle diameter.
[0010] Further, the inner wall of the conveying pipe of the cyclone separation section is fixedly provided with guide convex rib, and the guide convex rib is distributed in the spiral direction of spiral blade in the form of interval or continuous spiral.
[0011] Furthermore, the cross-section of the guide ridge is triangular.
[0012] Furthermore, the dust collection box has an inverted trapezoidal cross-section, and the upper wide part of the dust collection box is closely fitted with the bottom wall of the conveying pipe.
[0013] Furthermore, the dust collection box extends along the length of the cyclone separation section, and the length of the dust collection box is the same as that of the cyclone separation section; the dust collection box is fixed at the bottom of the conveying pipe by welding or bolts.
[0014] Furthermore, the ash discharge port is connected to an external pulse bag filter via a pneumatic butterfly valve and a flexible corrugated pipe.
[0015] The beneficial effects of this utility model are:
[0016] One advantage of this invention is that it sets up a cyclone separation section with a tapered cylindrical structure, which, combined with the increased height of the spiral blades and the reduced pitch, generates stronger centrifugal force during the airflow rotation, thereby improving dust separation efficiency.
[0017] One advantage of this invention is that an inverted trapezoidal dust collection box is installed at the bottom of the conveying pipe of the cyclone separation section. The dust collection box is attached to the inner wall of the conveying pipe, ensuring that the separated dust particles slide down the cylinder wall and are collected in the dust collection box, thus avoiding dust residue in the equipment.
[0018] One advantage of this invention is that a guide ridge is provided on the inner wall of the conveying pipe in the cyclone separation section. Combined with the stirring of the spiral blades, this breaks up the agglomeration of granular fertilizer, which would otherwise cause the dust discharge hole to become clogged, thus reducing the probability of blockage. On the other hand, it disrupts the local airflow, destroys the adsorption state between dust particles and airflow, and promotes their rapid contact with the cylinder wall and settling, further improving the separation effect. Attached image description:
[0019] Appendix Figure 1 This is a schematic diagram of the structure of this utility model;
[0020] Appendix Figure 2 This is a schematic diagram of the internal structure of the conveying pipe of this utility model;
[0021] Appendix Figure 3 This is a side view cross-sectional structural diagram of the conveying pipe of this utility model;
[0022] Appendix Figure 4 This is a schematic diagram of the conveying pipe structure of this utility model;
[0023] Appendix Figure 5 This is a bottom view schematic diagram of the conveying pipe structure of this utility model; in the attached drawing:
[0024] 1. conveying pipe; 11. feeding section; 12. cyclone separation section; 13. discharging section; 2. screw shaft; 3. feeding hopper; 4. discharging pipe; 5. driving motor; 6. dust collecting box; 61. dust discharge port; 62. ash discharge port; 7. guide ridge. DETAILED DESCRIPTION
[0025] In the description of the utility model, it needs to be understood that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "rear", "lower left", "upper right", "outer" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the protection scope of the utility model. In addition, the terms "first", "second" and "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.
[0026] The specific embodiment of the utility model: a kind of granular fertilizer production spiral conveying device, including screw conveyor, the screw conveyor includes conveying pipe 1, the conveying pipe 1 is penetrated with screw shaft 2 along the axial direction, the both ends of the screw shaft 2 are rotatably connected with conveying pipe 1 by bearing, and the one end of the screw is connected with driving motor 5 by coupling key;Spiral blade is fixedly wound on the surface of the screw shaft 2;Feeding hopper 3 is arranged at the input end of the screw conveyor body, and discharging pipe 4 is arranged at the output end of the screw conveyor body;
[0027] As the invention point of the utility model:
[0028] The conveying pipe 1 is sequentially divided into feeding section 11, cyclone separation section 12 and discharging section 13, the cyclone separation section 12 is arranged at the middle position of the conveying pipe 1, the cyclone separation section 12 is a tapered cylinder structure, and the two ends thereof are connected with the feeding section 11 and the discharging section 13 in equal diameter;The diameter of the cyclone separation section 12 gradually decreases from both ends to the middle, forming a gradient structure with the smallest diameter in the middle;
[0029] The spiral blade is located in the cyclone separation section 12, and the height of the spiral blade is higher than that of the spiral blade in the feeding section 11 and the discharging section 13. Increasing the height of the spiral blade can enlarge the contact area of the spiral blade and the airflow, so that the airflow is subjected to stronger constraint and guiding action in the rotating process. On the one hand, it helps to enhance the effect of centrifugal force on dust particles, so that the dust particles are more easily separated;On the other hand, the increased height of the spiral blade can prolong the residence time of the airflow in the separation section to a certain extent, so that the dust particles have more time to complete the separation process, thereby improving the separation efficiency.
[0030] The pitch between the helical blades in the cyclone separation section 12 is smaller than the pitch between the helical blades in the feeding section 11 and the discharging section 13, and the structure with the smaller pitch between the helical blades can increase the contact times of the airflow with the helical blades during the rotating upward process, and the airflow is guided and constrained by the helical blades to a higher degree, which is beneficial to the movement of the dust particles to the cylinder wall under the centrifugal force. Meanwhile, the smaller pitch can make the rotation of the airflow more stable, reduce the axial fluctuation of the airflow, and further improve the separation efficiency.
[0031] As preferred, the inner wall of the conveying pipe 1 in the cyclone separation section 12 is fixedly provided with a flow guide protruding rib 7, the flow guide protruding rib 7 is designed in a triangular cross section, and the flow guide protruding rib 7 is arranged in a helical direction along the helical blades; as preferred, the flow guide protruding rib 7 can also be distributed in a continuous helix along the inner wall of the conveying pipe 1; the flow guide protruding rib 7 can cooperate with the high-speed stirring of the helical blades to break the granulated fertilizer agglomerates, avoid the problem that the granulated fertilizer enters the cyclone separation section 12 and causes material blockage due to the reduced cross section, and also can disturb the local airflow to make the dust particles separate from the airflow, contact the inner wall of the conveying pipe 1 and settle.
[0032] A dust collection box 6 is arranged at the bottom of the conveying pipe 1 in the cyclone separation section 12, a plurality of dust discharge holes 61 are uniformly arranged in the bottom wall of the conveying pipe 1 and communicated with the dust collection box 6, the diameter of the dust discharge hole 61 is smaller than the diameter of the granulated fertilizer, the length of the dust collection box 6 is consistent with the length of the cyclone separation section 12, the dust collection box 6 extends along the length direction of the cyclone separation section 12, the dust collection box 6 is arranged at the bottom of the conveying pipe 1 by welding or bolt fixing, the cross section of the dust collection box 6 is designed as an inverted trapezoid, the wide part of the dust collection box 6 is tightly attached to the bottom wall of the conveying pipe 1, so that the dust falling from the inner wall of the cyclone separation section 12 can enter the dust collection box 6. A dust discharging port 62 is arranged at the bottom of the dust collection box 6, a plurality of dust discharging ports 62 can be arranged along the length direction of the dust collection box 6, the dust discharging port 62 is provided with a pneumatic butterfly valve and connected with an external pulse bag dust collector through a flexible corrugated pipe, wherein the pulse bag dust collector belongs to the prior art and is not protected by the utility model, and details are not repeated here.
[0033] It should be noted that the utility model is a kind of granulated fertilizer production spiral conveying device, when working specifically,
[0034] (1) the granulated fertilizer falls into the conveying pipe 1 from the feeding hopper 3, and the granulated fertilizer fills the blade gap under the action of gravity, the driving motor 5 is started, the helical shaft 2 drives the helical blade to rotate, and the helical blade generates axial thrust when rotating, so that the granulated fertilizer moves to the cyclone separation section 12 at a stable speed;
[0035] (2) When the granulated fertilizer enters the cyclone separation section 12, the granulated fertilizer rotates together with the airflow in the rotating process due to the increase of the height of the helical blade and the decrease of the pitch of the helical blade. Under the action of the centrifugal force, the dust particles are thrown to the cylinder wall, at the same time, the contact area of the helical blade with the airflow is increased and the contact frequency is increased, so that the airflow is subjected to stronger constraint and guidance, further promoting the separation of the dust particles. The guide ribs 7 on the inner wall of the conveying pipe 1 cooperate with the stirring of the helical blade to break the possible granulated fertilizer lumps and dust lumps, greatly preventing the blockage of the dust discharge hole 61 caused by the granulated fertilizer lumps and dust lumps, and reducing the blockage probability. The separated dust particles slide along the cylinder wall from the dust discharge hole 61 to the dust collection box 6 at the bottom.
[0036] With this design, the height of the helical blade is increased, the contact area with the airflow is expanded, the constraint and guidance of the airflow are enhanced, and the centrifugal force on the dust particles is increased. The pitch is decreased, the contact frequency of the airflow with the helical blade is increased, the guidance and constraint are enhanced, the airflow rotation is more stable, and the dust particles are promoted to move to the cylinder wall under the centrifugal force and separate.
[0037] (3) After the granulated fertilizer is separated by the cyclone, the granulated fertilizer is continuously conveyed by the helical blade of the discharge section 13 and discharged from the screw conveyor through the discharge pipe 4, completing the entire conveying process.
[0038] (4) The dust discharge port 62 at the bottom of the dust collection box 6 is connected with a pneumatic butterfly valve and a flexible bellows, and is connected with an external pulse bag dust collector. When dust needs to be cleaned, the pneumatic butterfly valve is opened, and the dust is collected and treated under the action of the pulse bag dust collector.
[0039] Due to the decrease of the pitch and the increase of the height of the helical blade of the cyclone separation section 12, the airflow is guided by the helical blade with high frequency in the rotating process, forming a stable spiral upward flow field, and being thrown to the inner wall of the conveying pipe 1 under the action of the centrifugal force, and sliding along the inner wall of the conveying pipe 1 to the dust collection box 6 at the bottom; and cooperating with the external pulse bag dust collector to form a negative pressure airflow, which can avoid the accumulation of dust in the dust collection box 6 or the back mixing caused by the stirring of the helical blade.
[0040] The above shows and describes the basic principles and main features of the present application and the advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.
Claims
1. A spiral conveying device for granular fertilizer production, comprising a spiral conveyor, the spiral conveyor comprising a conveying pipe (1), a spiral shaft (2), a driving motor (5), a feeding hopper (3) and a discharging pipe (4); characterized in that: the conveying pipe (1) is sequentially divided into a feeding section (11), a cyclone separation section (12) and a discharging section (13) along the axial direction, the cyclone separation section (12) is a tapered cylindrical structure, and its two ends are connected with the feeding section (11) and the discharging section (13) in equal diameter; the height of the spiral blade in the cyclone separation section (12) is greater than that of the spiral blade in the feeding section (11) and the discharging section (13), and the pitch of the spiral blade is smaller than that of the spiral blade in the feeding section (11) and the discharging section (13); a dust collection box (6) is arranged at the bottom of the conveying pipe (1) of the cyclone separation section (12), a plurality of dust discharge holes (61) are uniformly arranged on the bottom wall of the conveying pipe (1) and connected with the dust collection box (6), and a dust discharge port (62) is arranged at the bottom of the dust collection box (6).
2. A spiral conveying device for granulated fertilizer production according to claim 1 characterized in that The diameter of the cyclone separation section (12) gradually decreases from both ends to the middle, forming a gradual structure with the smallest middle diameter.
3. A spiral conveying device for granulated fertilizer production according to claim 2, characterized in that A guide convex rib (7) is fixedly arranged on the inner wall of the conveying pipe (1) of the cyclone separation section (12), and the guide convex rib (7) is distributed in a spaced or continuous spiral shape along the spiral direction of the spiral blade.
4. A spiral conveying device for granulated fertilizer production according to claim 3, characterized in that The cross section of the guide convex rib (7) is triangular.
5. The spiral conveying device for granulated fertilizer production according to claim 1, characterized in that The cross section of the dust collection box (6) is designed as an inverted trapezoid, and the wide part of the dust collection box (6) is tightly attached to the bottom wall of the conveying pipe (1).
6. A screw conveyor for granulated fertilizer production according to claim 5, characterized in that The dust collection box (6) extends along the length direction of the cyclone separation section (12), and the length of the dust collection box (6) is consistent with that of the cyclone separation section (12); the dust collection box (6) is arranged at the bottom of the conveying pipe (1) by welding or bolt fixing.
7. The spiral conveying device for granulated fertilizer production according to claim 1, characterized in that The dust discharge port (62) is connected with an external pulse bag dust collector through a pneumatic butterfly valve and a flexible bellows.