Conveying device for solid particles

Abstract

This invention relates to a conveying device for solid particles, comprising a hopper and a conveying pipe. The hopper has an inlet communicating with a storage device, and a filter is provided on the hopper. The conveying pipe connects the hopper and a target device, wherein the pressure within the target device is greater than the pressure within the hopper. The filter is configured to discharge gas entering the hopper from the target device via the conveying pipe when solid particles in the hopper pass through the conveying pipe into the target device. This causes a sudden increase in the volume and a sudden decrease in the flow velocity of the gas entering the hopper from the conveying pipe, effectively reducing the resistance of the gas flow to the solid particles during their descent, allowing the solid particles to enter the conveying pipe more easily and preventing blockages when conveying solid particles to the target device.

Description

Technical Field

[0001] This invention relates to the field of material conveying technology, and more specifically to a conveying device for solid particles. Background Technology

[0002] In modern chemical processes, solid catalysts are often used to convert raw materials into products or process solid raw materials. Since catalysts gradually lose their catalytic activity during production, they need to be continuously transported to downstream production units. Therefore, the transport of solid particulate materials is a crucial step in moving bed reactor systems, materials production, and food transportation. In most cases, solid particulate materials are stored in atmospheric pressure equipment. However, transporting these materials involves moving them from low-pressure to high-pressure equipment—a process known as reverse pressure transport. During this process, fluid in the high-pressure equipment spontaneously flows towards the low-pressure equipment. The large flow rate of this fluid can impede the transport of particulate materials, causing blockages. To avoid blockages, current technologies typically increase the overall height of the equipment to extend the length of the transport pipeline. This significantly increases the volume and length of the transport system, reducing its space occupancy while increasing construction costs. Summary of the Invention

[0003] In view of the above-mentioned problems in the prior art, the present invention provides a conveying device for solid particles, which can effectively avoid blockage during the conveying of solid granular materials from low-pressure equipment to high-pressure equipment, while reducing the height of the equipment, saving space, and reducing construction costs.

[0004] The technical solution adopted by the present invention to solve its technical problem is: to provide a conveying device for solid particles, comprising,

[0005] The hopper has a feed inlet connected to the storage equipment, and a filter is provided on the hopper;

[0006] A conveying pipeline connects the silo and the target equipment, wherein the pressure inside the target equipment is greater than the pressure inside the silo.

[0007] The filter unit is configured to discharge gas that enters the silo from the target device through the conveying pipe when solid particles in the silo enter the target device through the conveying pipe.

[0008] Furthermore, the filtration section includes a sieve plate that is at least partially disposed on the side wall of the hopper.

[0009] Furthermore, the screen plate extends circumferentially on the side wall of the silo.

[0010] Furthermore, the filter section is connected to the conveying pipe in a vertical direction so that solid particles in the hopper enter the conveying pipe under the action of gravity.

[0011] Furthermore, the conveying device also includes a gas collecting section disposed outside the silo and part of the conveying pipeline. The gas collecting section and the silo together form a gas collecting chamber. The gas collecting chamber is connected to the inside of the silo through the filter section, so that the gas in the conveying pipeline can enter the gas collecting chamber.

[0012] Furthermore, the gas collecting section is provided with an outlet for discharging the gas in the gas collecting chamber.

[0013] Furthermore, the portion of the conveying pipe located within the gas collecting chamber has several holes, the size of which is smaller than the particle size of the solid particles, so that only the gas in the target device can enter the gas collecting chamber through the holes via the conveying pipe.

[0014] Furthermore, the hopper is also equipped with a feeding chamber connected to the feed inlet and a buffer chamber connected to the feeding chamber, with the end of the buffer chamber away from the feeding chamber connected to the conveying pipe.

[0015] Furthermore, the buffer cavity is funnel-shaped, with its large-diameter end connected to the feeding cavity and its small-diameter end connected to the conveying pipe.

[0016] Furthermore, the cone angle α of the buffer cavity is in the range of 30° to 90°.

[0017] The beneficial effects of this invention are as follows: This invention provides a conveying device for solid particles, comprising a hopper and a conveying pipe. The hopper has an inlet communicating with a storage device, and a filter is provided on the hopper. The conveying pipe connects the hopper and a target device, where the pressure inside the target device is greater than the pressure inside the hopper. The filter is configured to discharge gas entering the hopper from the target device through the conveying pipe when solid particles in the hopper enter the target device. This causes a sudden increase in the volume and a sudden decrease in the flow velocity of the gas entering the hopper from the conveying pipe, effectively reducing the resistance of the gas flow to the solid particles during their descent. This allows the solid particles to enter the conveying pipe more easily, avoiding blockages when conveying solid particles to the target device. Simultaneously, the solid particles in the buffer chamber of this invention can be propelled by gravity within the conveying pipe, thereby accelerating the conveying of solid particles and preventing blockages in the conveying pipe. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 The diagram shows a structural schematic of a conveying device for solid particles.

[0020] In the figure, the following labels are used: 10, hopper; 11, feed inlet; 12, filter section; 13, feeding chamber; 14, buffer chamber; 15, gas collection section; 151, gas collection chamber; 152, gas outlet; 20, conveying pipeline; 21, discharge port; 22, hole; 30, target equipment. Detailed Implementation

[0021] To make the technical problem to be solved, the technical solution, and the beneficial effects of this invention clearer, the invention will now be described in detail with reference to the accompanying drawings. This drawing is a simplified schematic diagram, illustrating only the basic structure of the invention, and therefore only shows the components relevant to the invention. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0022] refer to Figure 1 As shown, the present invention provides a conveying device for solid particles, comprising a hopper 10 for temporary storage of solid particles and a conveying pipe 20 communicating with the hopper 10. The hopper 10 is provided with an inlet 11 for inputting solid particles from a storage device (not shown). The end of the conveying pipe 20 away from the hopper 10 has an outlet 21, which is used to communicate with a target device 30. The pressure in the target device 30 is greater than the pressure in the storage device and the hopper 10, such that while the solid particles in the hopper 10 are conveyed to the target device 30 via the conveying pipe 20, gas in the target device 30 also enters the hopper 10 via the conveying pipe 20.

[0023] The hopper 10 is also equipped with a filter section 12, which allows gas entering the hopper 10 to pass through while blocking solid particles. This allows the gas entering the hopper 10 to be discharged, causing a sudden increase in the volume and a sudden decrease in the flow rate of the gas entering the hopper 10 from the conveying pipe 20. This effectively reduces the resistance of the gas flow to the solid particles during their descent, allowing the solid particles to enter the conveying pipe 20 more easily and avoiding blockage problems when conveying solid particles to the target device 30. In addition, the filter section 12 further reduces the power required to resist gas accumulation by increasing the volume and decreasing the flow rate of the gas as it passes through the conveying pipe 20 and reaches the hopper 10. This allows for a further reduction in the length of the hopper 10 and the conveying pipe 20, thereby accelerating the conveying of solid particles while reducing the size and length of the conveying device, thus reducing space occupancy and manufacturing costs.

[0024] Combination Figure 1 As shown, the filter unit 12 is located on the side of the hopper 10 closest to the conveying pipe 20. Since the closer the hopper 10 is to the conveying pipe 20, the more easily gas accumulates, affecting the conveying of solid particles. Therefore, placing the filter unit 12 on the side of the hopper 10 closest to the conveying pipe 20 allows for timely and effective gas discharge from the hopper 10, thereby accelerating the conveying of solid particles.

[0025] In some embodiments, the filter section 12 includes a sieve plate at least partially disposed on the hopper 10. The sieve plate may be a porous sieve plate. The aperture size of the sieve plate can be adaptively set according to the particle size of the solid particles to be conveyed, as long as the solid particles cannot pass through the sieve plate when the gas exits the hopper 10. It should be noted that the volume of the hopper 10 above the filter section 12 accounts for no less than 60% of the volume of the solid particles in the hopper 10 and the conveying pipe 20, thereby preventing the filter section 12 from being located too close to the upper part of the hopper 10, which would prevent the gas entering the hopper 10 from being discharged in a timely manner. This can more effectively reduce the resistance of the gas to the solid particles and reduce the conveying time of the solid particles. Depending on the flow rate of the gas entering the hopper 10 through the conveying pipe 20 from the target device 30, this proportion may also be no less than 80%. In other embodiments, the filter section 12 may also be a wound wire sieve tube or other sintered metal filter structure.

[0026] Combined again Figure 1 As shown, the sieve plate extends circumferentially along the side wall of the hopper 10. This allows gas entering the hopper 10 from the target device 30 via the conveying pipe 20 to be discharged from various circumferential angles and positions, thereby further preventing solid particles from clogging the hopper 10.

[0027] Combination Figure 1As shown, the sieve plate is directly connected to the conveying pipe 20. This allows the gas entering the hopper 10 from the target device 30 through the conveying pipe 20 to be discharged in a timely manner, preventing gas from accumulating at the connection between the conveying pipe 20 and the hopper 10. This also further prevents solid particles from clogging the connection between the conveying pipe 20 and the hopper 10, accelerating the conveying of solid particles.

[0028] Combined again Figure 1 As shown, the hopper 10 contains a feeding chamber 13 connected to the feed inlet 11 and a buffer chamber 14 connected to the feeding chamber 13. The feeding chamber 13 can be cylindrical or prismatic. The buffer chamber 14 can be funnel-shaped to guide solid particles entering the feeding chamber 13 from the feed inlet 11 into the conveying pipe 20. The larger diameter end of the buffer chamber 14 is connected to the feeding chamber 13, and the smaller diameter end is connected to the conveying pipe 20. This increases the volume and decreases the flow velocity of the gas entering the buffer chamber 14 from the target device 30 through the conveying pipe 20, making it easier for solid particles to enter the conveying pipe 20. The diameter of the conveying pipe 20 can be less than or equal to the diameter of the feed inlet 11. The funnel-shaped buffer chamber 14 can also allow the solid particles in the hopper 10 to accumulate to a higher height, thereby increasing the pressure generated by the solid particles at the connection between the buffer chamber 14 and the conveying pipe 20. This better counteracts the pressure of the gas flowing into the hopper 10 from the target device 30 through the conveying pipe 20, thus accelerating the conveying of solid particles.

[0029] In some embodiments, the cone angle α of the buffer chamber 14 is in the range of 30° to 90°, and the size of the cone angle α needs to meet the requirement of free sliding of solid particles. In some embodiments, the smaller the particle size of the solid particles, the higher the packing density of the solid particles in the hopper 10. In this case, the smaller the cone angle α, the easier it is for the solid particles in the hopper 10 to fall, thereby accelerating the conveying of solid particles. The solid particles in the buffer chamber 14 can push the solid particles in the conveying pipe 20 under the action of gravity, thereby accelerating the conveying of solid particles and preventing the conveying pipe 20 from becoming blocked.

[0030] Combination Figure 1As shown, the conveying device also includes a gas collecting section 15 disposed outside the silo 10 and part of the conveying pipeline 20. The gas collecting section 15, together with the silo 10 and the conveying pipeline 20, constitutes a gas collecting chamber 151. The gas collecting chamber 151 is connected to the silo 10 through a filter section 12, allowing gas entering the silo 10 to pass through the filter section 12 and enter the gas collecting chamber 151. The gas collecting section 15 is provided with an outlet 152 for discharging gas from the gas collecting chamber 151. A valve is also provided on the outlet 152 to control the gas discharged from the outlet 152. This effectively controls the gas discharged from the silo 10 through the filter section 12, preventing the gas from being directly discharged into the air. The volume of the gas collecting chamber 151 can be calculated based on the volume of gas flowing in the conveying pipeline 20 at a target flow rate passing through the filter section 12 within a target time.

[0031] In some embodiments, the portion of the conveying pipe 20 located within the gas collecting chamber 151 has several holes 22. The size of the holes 22 is smaller than the particle size of the solid particles, preventing solid particles from entering the gas collecting chamber 151. Simultaneously, gas entering the conveying pipe 20 from the target device 30 can directly enter the gas collecting chamber 151 through the holes 22, further preventing gas accumulation at the connection between the conveying pipe 20 and the hopper 10. This also further prevents solid particles from clogging the connection between the conveying pipe 20 and the hopper 10, accelerating the conveying of solid particles.

[0032] The following describes the conveying device for solid particles provided by the present invention through specific embodiments.

[0033] Example 1

[0034] In this embodiment, the solid particles are soybeans. The diameter of the hopper 10 is 2.12m, the generatrix length of the buffer chamber 14 is 1.50m, and the cone angle α is 90°. The diameter of the conveying pipe 20 is 0.15m, and the length is 5.00m. The pressure of the feeding chamber 13 is atmospheric pressure, and the gauge pressure of the target device is 0.3MPa. The average particle size of the soybeans is approximately 5.0mm, and the bulk density is 400kg / m³. The filter section 12 uses a sieve plate with a pore size of 2mm. The volume of the gas collecting section 15 is calculated based on the volume of gas flowing in the conveying pipe 20 at the target flow rate passing through the filter section 12 in 10s.

[0035] Soybeans enter the feeding chamber 13 of the silo 10 through the inlet 11 of the storage device, then pass through the buffer chamber 14 into the conveying pipe 20, and finally enter the target device 30 through the outlet 21. During this process, the gas in the target device 30 increases in volume and decreases in pressure after entering the silo 10 through the conveying pipe 20, making it easy for the soybeans in the silo 10 to enter the conveying pipe 20. The soybeans entering the conveying pipe 20 move to the outlet 21 under gravity, thus completing the reverse pressure differential conveying of the soybeans.

[0036] The total height of the conveying device in this embodiment can be only within the range of 5.00m to 10.00m, which can be placed in a single-story or double-story factory building, saving 90% of the construction cost compared to a conveying device with a theoretical height of 75m. In addition, soybeans are transported in the conveying device solely by gravity, without the need for additional power, further reducing transportation costs.

[0037] Example 2

[0038] In this embodiment, the solid particles are catalysts. The diameter of the hopper 10 is 3.00 m, the generatrix length of the buffer chamber 14 is 3.00 m, and the cone angle α is 60°. The diameter of the conveying pipe 20 is 0.10 m, and the length is 3.00 m. The gauge pressure of the feeding chamber 13 is 0.3 MPa, and the gauge pressure of the target device is 0.4 MPa. The average particle size of the catalyst is approximately 1.6 mm, and the bulk density is 560 kg / m³. The filter section 12 uses a Johnson screen (i.e., a wire-wound screen tube) with a mesh size of 0.8 mm. The volume of the gas collecting section 15 is calculated based on the volume of gas flowing in the conveying pipe 20 at the target flow rate passing through the filter section 12 within 60 s.

[0039] The catalyst enters the feeding chamber 13 of the silo 10 from the storage device through the inlet 11, then passes through the buffer chamber 14 into the conveying pipe 20, and finally enters the buffer hopper of the target device 30 through the outlet 21. During this process, the gas in the target device 30, such as hydrogen, increases in volume and decreases in pressure after entering the silo 10 through the conveying pipe 20, making it easy for the catalyst in the silo 10 to enter the conveying pipe 20. The catalyst entering the conveying pipe 20 moves to the outlet 21 under gravity, thus completing the reverse pressure differential conveying of the catalyst. Meanwhile, the hydrogen entering the silo 10 passes through the filter section 12 into the gas collecting section 15, and then exits through the gas outlet 152.

[0040] The total height of the conveying device in this embodiment is only in the range of 3.00m to 10.00m, which can be placed in a single-story or double-story factory building. Compared with the conveying device with a theoretical height of 17.86m, it can save 80% of the construction cost.

[0041] Example 3

[0042] In this embodiment, the solid particles are lead sand. The diameter of the hopper 10 is 2.00 m, the generatrix length of the buffer chamber 14 is 4.00 m, and the cone angle α is 30°. The diameter of the conveying pipe 20 is 0.05 m, and the length is 3.00 m. The pressure of the feeding chamber 13 is atmospheric pressure, and the gauge pressure of the target device is 0.2 MPa. The average particle size of the lead sand is approximately 0.3 mm, and the bulk density is 2000 kg / m³. The filter section 12 adopts a precision filter structure made of sintered stainless steel. The volume of the gas collecting section 15 is calculated based on the volume of gas flowing in the conveying pipe 20 at the target flow rate passing through the filter section 12 within 5 seconds.

[0043] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0044] It should be understood that the terms "length", "width", "up", "down", "front and back", "left and right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0045] Although the invention has been described with reference to preferred embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the invention. In particular, the technical features mentioned in the various embodiments can be combined in any manner as long as there is no structural conflict. The invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A conveying device for solid particles, characterized in that, include, The hopper (10) has a feed inlet (11) connected to the storage equipment, and a filter section (12) is provided on the hopper (10); A conveying pipe (20) is used to connect the silo (10) and the target device (30), wherein the pressure in the target device (30) is greater than the pressure in the silo (10). The filter unit (12) is configured to discharge the gas that enters the silo (10) from the target device (30) through the conveying pipe (20) when solid particles in the silo (10) enter the target device (30) through the conveying pipe (20).

2. The conveying device for solid particles according to claim 1, characterized in that, The filtration section (12) includes a sieve plate that is at least partially disposed on the side wall of the hopper (10).

3. The conveying device for solid particles according to claim 2, characterized in that, The sieve plate extends circumferentially on the side wall of the silo (10).

4. The conveying device for solid particles according to claim 1, characterized in that, The filter section (12) is connected to the conveying pipe (20) in the vertical direction so that solid particles in the hopper (10) enter the conveying pipe (20) under the action of gravity.

5. The conveying device for solid particles according to claim 1, characterized in that, The conveying device also includes a gas collecting section (15) disposed outside the silo (10) and part of the conveying pipe (20). The gas collecting section (15), together with the silo (10) and the conveying pipe (20), forms a gas collecting chamber (151). The gas collecting chamber (151) is connected to the inside of the silo (10) through the filter section (12), so that the gas in the conveying pipe (20) can enter the gas collecting chamber (151).

6. The conveying device for solid particles according to claim 5, characterized in that, The gas collecting section (15) is provided with an outlet (152) for discharging the gas in the gas collecting chamber (151).

7. The conveying device for solid particles according to claim 5, characterized in that, The portion of the conveying pipe (20) located within the gas collecting chamber (151) has several holes (22). The size of the holes (22) is smaller than the particle size of the solid particles, so that only the gas in the target device (30) can enter the gas collecting chamber (151) through the holes (22) via the conveying pipe (20).

8. The conveying device for solid particles according to any one of claims 1-7, characterized in that, The hopper (10) is also equipped with a feeding chamber (13) connected to the feed inlet (11) and a buffer chamber (14) connected to the feeding chamber (13). The end of the buffer chamber (14) away from the feeding chamber (13) is connected to the conveying pipe (20).

9. The conveying device for solid particles according to claim 8, characterized in that, The buffer chamber (14) is funnel-shaped. The large-diameter end of the buffer chamber (14) is connected to the feeding chamber (13), and the small-diameter end of the buffer chamber (14) is connected to the conveying pipe (20).

10. The conveying device for solid particles according to claim 9, characterized in that, The cone angle α of the buffer cavity (14) is in the range of 30° to 90°.

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