A silo for powder addition and mixing

Abstract

This utility model relates to the technical field of silo equipment, specifically to a silo for powder addition and mixing. It includes a silo body with an internal anti-arching mechanism and a mixing tank with a weighing module connected below the silo body. A centrifugal pump is flexibly connected to the bottom of the mixing tank, and the other side of the centrifugal pump is connected to a biochemical tank via a pipeline. When the weight of the powder in the mixing tank reaches the set value for a single addition, stirring is activated, and the powder and liquid form a uniform powder slurry, which is then pumped into the biochemical tank. This utility model, through the above design, achieves multiple, continuous, precise, and automatic addition of powdered materials in long-distance transportation scenarios, without requiring manual intervention throughout the process. The stability and accuracy of the operation are significantly improved compared to previous methods.

Description

Technical Field

[0001] This utility model relates to the field of silo equipment technology, specifically to a silo for adding and mixing powder materials. Background Technology

[0002] The silos used in powder dosing systems are widely used in wastewater treatment, chemical production and food processing. Their core requirement is to achieve multiple, continuous and precise powder dosing in scenarios where there is a certain distance between the dosing device and the target dosing point.

[0003] Existing technology, such as the Chinese utility model patent with publication number CN212215345U entitled "A Multi-Material Powder Additive Preparation System," specifically discloses a system comprising a powder storage and metering subsystem, a powder mixing subsystem, a powder packaging subsystem, and an automatic control system. The powder storage and metering subsystem consists of several powder silos, a screw feeder, and a bucket scale; the powder mixing subsystem includes a mixer and a semi-finished product silo; the mixer is equipped with a single-shaft stirring device, a pneumatic stirring device, and a gas pressurization and heating device; the powder packaging subsystem consists of a weighing device, an automatic sealing machine, and a belt conveyor; and the automatic control system controls and adjusts the set operating parameters of the preparation system.

[0004] The above solution can realize the functions of static accurate metering, sequential rapid feeding and timed continuous feeding of various powdery materials. At the same time, it can also realize the functions of pressurization and heating of large-volume mixing equipment, avoiding the defects of poor metering accuracy, inability to automatically feed materials in sequence and poor mixing effect.

[0005] In actual processing, powdered materials often need to be continuously and precisely added from storage points to production units or reaction devices that are far away. This "long-distance addition" scenario places high demands on the stability, accuracy, and automation of the addition system. However, existing powder addition methods (such as the above-mentioned solutions) often cannot meet multiple requirements simultaneously.

[0006] On the one hand, the silos lack efficient arch-breaking devices, and the powder is prone to "bridging" or "arching" due to moisture or static pressure, resulting in poor or even interrupted material feeding and making it impossible to achieve "continuous" feeding. On the other hand, most systems still rely on volumetric or time-series control for feeding, making it difficult to accurately measure the weight of the powder in real time. Especially when the characteristics of the powder change, "precise" feeding is difficult to guarantee. In addition, the feeding process often requires manual intervention, and the weighing module is easily affected by pump vibration, making it impossible to truly achieve "automatic feeding".

[0007] Therefore, there is an urgent need to develop an integrated silo system with functions such as material storage and arch breaking, real-time weighing, automatic mixing and long-distance pumping, in order to solve the unified challenges of long-distance, continuous, high-precision and fully automatic feeding. Utility Model Content

[0008] Technical problems to be solved

[0009] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a hopper for powder feeding and mixing, which can achieve the goal of multiple, continuous and precise powder feeding in scenarios where there is a certain distance between the feeding device and the target feeding point.

[0010] Technical solution

[0011] To achieve the above objectives, this utility model provides the following technical solution:

[0012] This utility model provides a silo for powder addition and mixing, including a silo body with an internal arch-breaking mechanism and a dosing tank connected below the silo body; the bottom of the dosing tank is flexibly connected to a centrifugal pump, and the other side of the centrifugal pump is connected to a biological treatment tank through a pipe. When the weight of the powder in the powder slurry in the dosing tank reaches the single addition set value, stirring is started, and the powder and liquid form a uniform powder slurry, which is then pumped into the biological treatment tank.

[0013] Furthermore, a vacuum feeder is installed on the top of the silo.

[0014] Furthermore, a star-shaped unloader is provided between the silo and the vacuum feeder.

[0015] Furthermore, a star-shaped unloader is provided between the silo and the dispensing tank.

[0016] Furthermore, the silo body is connected to a corrugated hose and a star-shaped unloader.

[0017] Furthermore, a dust collector is provided on the top of the silo to prevent powder from overflowing the silo.

[0018] Furthermore, an explosion-proof valve is provided on the top of the silo.

[0019] Furthermore, the bottom of the medicine dispensing tank is provided with at least one weighing module.

[0020] Furthermore, the mixing tank is equipped with a stirring shaft and a level gauge.

[0021] Furthermore, the stirring shaft is parallel to the material drop trajectory of the hopper.

[0022] Furthermore, the arch-breaking mechanism includes a vibration module and an airflow-assisted bowl disposed within the chamber.

[0023] Furthermore, at least one flow-aiding air bowl is provided, and the air outlet of the flow-aiding air bowl faces one side of the central axis of the chamber and is inclined upward.

[0024] Furthermore, the air-assisted bowls are provided in several units and arranged circumferentially along the chamber body.

[0025] Furthermore, at least one vibration module is provided.

[0026] Beneficial effects

[0027] The technical solution provided by this utility model has the following advantages compared with the prior art:

[0028] This invention provides a reliable device for achieving multiple, continuous, precise, and automatic powder feeding in scenarios where there is a certain distance between the feeding device and the target feeding position.

[0029] Real-time weighing of powder can control the amount of powder added at one time, thus improving the accuracy of powder addition.

[0030] By installing circumferentially inclined air-assisted bowls inside the silo, combined with a vibration module, the airflow can be sprayed upwards to break up agglomerated powder, while synchronous vibration eliminates residue on the silo walls. Compared to traditional unclogging methods, this method consumes less energy and occupies less space, effectively reducing the clogging rate inside the silo and ensuring continuous powder flow.

[0031] The star-shaped unloader allows the powder to be fed into the dosing tank in stages and in measured quantities, avoiding dust dispersion caused by a single discharge.

[0032] The centrifugal pump's flexible connection to the dosing tank eliminates vibration transmission and prevents the vibration during pump operation from affecting the weighing module of the dosing tank.

[0033] By aligning the stirring shaft parallel to the material drop trajectory, the powder is radially cut by the blades as it falls vertically, preventing clumping and settling. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the overall structure of the silo in an embodiment of this utility model;

[0036] Figure 2 This is a schematic diagram of the main body connection structure of the silo in an embodiment of this utility model;

[0037] Figure 3 This is a front view structural diagram of the main body of the silo in an embodiment of this utility model.

[0038] The labels in the diagram represent: 1. Silo body; 10. Vacuum feeder; 101. Feed pipe; 102. External air source; 11. Corrugated hose; 2. Dosing tank; 21. Weighing module; 22. Stirring shaft; 23. Liquid level gauge; 3. Centrifugal pump; 4a. Rotary rotary valve one; 4b. Rotary rotary valve two; 41. Vibration module; 5. Dust collector; 6. Explosion-proof valve; 7. Air flow aid. Detailed Implementation

[0039] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0040] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical 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 utility model based on the specific circumstances.

[0041] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0042] In the description of this embodiment, the terms "upper," "lower," "left," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not 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 this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0043] The present invention will be further described below with reference to the embodiments.

[0044] Example:

[0045] Please refer to the appendix. Figure 1-3 This solution proposes a silo for powder addition and mixing. The silo in this utility model includes a silo body 1 with an internal anti-arch mechanism and a dispensing tank 2 connected below the silo body 1.

[0046] The silo body 1 adopts a cylindrical conical bottom structure. A vacuum feeder 10 is installed on the top of the silo body 1. A vacuum generating device and a pulse dust removal device are connected to the vacuum feeder 10. When the vacuum feeder 10 is started, the feed pipe 101 connected to the vacuum feeder 10 sucks the powder into the silo body 1 through negative pressure. The pulse dust removal device is used to remove the dust inside the vacuum feeder 10.

[0047] It should be noted that a star-shaped unloader 4a is installed between the vacuum feeder 10 and the hopper 1, which can control the batch input of powder, ensuring the vacuum level while avoiding blockage.

[0048] A dust collector 5 is installed on the top of the silo 1. The specific selection of the dust collector is not limited. It can be an atomizing dust collector or other types of dust collectors. In this embodiment, the dust collector is a bag dust collector. The dust collector 5 is also equipped with an interface for connecting to an external air source. It uses negative pressure to suck in the powder suspended in the silo 1 for filtration, so as to prevent the dust inside the silo 1 from overflowing into the external air environment when the silo 1 is filled with material.

[0049] The top of the chamber 1 is also equipped with an explosion-proof valve 6, whose burst pressure is set at 0.2MPa, which meets the ATEX explosion-proof certification standard.

[0050] The silo body 1 adopts a cylindrical cone bottom structure. The bottom of the cone is connected to the star-shaped unloader 4b through a corrugated hose 11. The expansion and contraction of the corrugated hose 11 is designed to be ±50mm, which can compensate for displacement deviation during equipment operation.

[0051] A vibration module 41 is installed above the star-shaped unloader 4b. When the powder is fed into the dosing tank 2 from the bin 1, the vibration module is activated, which can effectively reduce the powder from lingering on the bin wall.

[0052] Simultaneously, several flow-aiding air cups 7 are uniformly welded circumferentially in the conical transition section. The air inlet of each air cup is connected to an external air pump, and the air outlet of each air cup faces the central axis of the hopper and is inclined upward. Compressed air is pulsed and sprayed at intervals controlled by a solenoid valve to effectively break up powder bridging. That is, in this embodiment, the vibration module 41 and the flow-aiding air cups 7 work together to ensure continuous powder falling.

[0053] As attached Figure 2 As shown, the dust collector 5, the air-assisted flow bowl 7, and the vacuum feeder 10 are all connected to the external air source 102.

[0054] The rotary valve 4 (including 4a and 4b) is a known technology and will not be described in detail here. It includes a rotating shaft perpendicular to the direction of powder descent, and several rotor plates are vertically distributed on the outer side of the rotating shaft. The rotary valve 4b at the bottom of the silo 1 can control the amount of powder falling by frequency conversion speed regulation. Its rotor chamber accurately outputs the required amount of powder per revolution. When the rotor speed remains constant, the powder can fall into the mixing tank 2 below at a uniform speed.

[0055] In addition, the lower outlet of the star-shaped unloader 4b is vertically aligned with the feed inlet of the mixing tank 2. The mixing tank 2 has a stirring shaft 22 installed in a non-central position inside the tank. This shaft is parallel to the material drop trajectory of the hopper, so that the powder is directly cut by the radially arranged blades when it falls vertically.

[0056] The side wall of the dosing tank 2 is connected to a magnetic float level gauge 23 via a flange, whose range covers the entire liquid level height of the dosing tank 2. Four sets of matrix-arranged weighing modules 21 are installed at the bottom of the tank to support it.

[0057] Furthermore, the outlet of the dosing tank 2 is connected to the centrifugal pump 3 via a rubber hose. The outlet pipe of the centrifugal pump 3 is directly connected to the biological treatment tank via a vent pipe. When the weight of the powder in the dosing tank 2 reaches the single addition set value, the centrifugal pump 3 is started to pump the powder slurry in the dosing tank 2 into the biological treatment tank.

[0058] In this embodiment, the workflow is executed automatically according to the following steps:

[0059] The first stage is negative pressure feeding. The operator inserts the vacuum feeder's suction pipe into the ton bag and starts the feeding program in the control cabinet. A negative pressure is formed inside the silo 1, and the DE carrier powder is continuously drawn into the silo. At the same time, the dust collector 5 starts simultaneously to capture the escaping dust. A level gauge (not shown) is also installed inside the silo 1. When a full silo signal is detected or the material level reaches the designated position, the system automatically stops feeding.

[0060] After setting the single-dosage weight of the powder in the control cabinet, click the run button. The system first opens the electric knife gate valve, then starts the rotary valve 4a, and simultaneously activates the vibration module 41 and the pulse solenoid valve of the air-assisted bowl 7 in the silo 1. Under the combined action of vibration and inclined airflow, the powder falls uniformly into the mixing tank 2 through the corrugated hose 11 and the rotary valve 4b. The weighing module 21 collects the weight of the powder in real time. When the cumulative value reaches the predetermined weight, the rotary valve 4b immediately stops rotating, and the vibration module and the air-assisted bowl 7 shut down synchronously.

[0061] After the powder is added, the water inlet solenoid valve opens automatically, and process water is injected into the mixing tank 2. The magnetic level gauge 23 monitors the liquid level in real time. When the height reaches the predetermined value, the water inlet is closed, and the stirring shaft 22 rotates to stir and mix the powder slurry.

[0062] After the mixing is completed, the centrifugal pump 3 starts automatically and pumps the powder slurry into the biochemical tank through the UPVC pipe. When the level gauge 23 reaches the predetermined value, the centrifugal pump 3 stops running.

[0063] The system can be programmed to automatically repeat the above steps until the target total weight is achieved. After each cycle, the control cabinet records the addition time, actual weight, and liquid level data. If the explosion-proof valve 6 triggers a pressure relief during operation, the system will immediately stop and alarm.

[0064] In this embodiment, the 0.6MPa compressed air required by the air-assisted bowl 7 can be provided in two ways: one is by using the screw air compressor built into the equipment, and the other is by connecting to the existing air source network in the plant area. The pipeline is equipped with a pressure reducing valve and an oil-water separator, which are well-known technologies and will not be described in detail here.

[0065] 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 the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of this utility model.

Claims

1. A silo for adding and mixing powder materials, characterized in that, It includes a silo (1) with an internal arch-breaking mechanism and a dosing tank (2) connected below the silo (1); the bottom of the dosing tank (2) is flexibly connected to a centrifugal pump (3), and the other side of the centrifugal pump (3) is connected to a biochemical tank through a pipe. When the weight of the powder in the powder slurry in the dosing tank (2) reaches the single addition set value, the stirring is started, the powder and liquid form a uniform powder slurry, and then it is pumped into the biochemical tank.

2. The silo for powder feeding and mixing according to claim 1, characterized in that, A vacuum feeder (10) is installed on the top of the silo (1).

3. A silo for powder feeding and mixing according to claim 2, characterized in that, A star-shaped unloader (4a) is provided between the silo body (1) and the vacuum feeder (10).

4. A silo for powder feeding and mixing according to claim 1, characterized in that, A star-shaped unloader (4b) is provided between the silo (1) and the dispensing tank (2).

5. A silo for powder feeding and mixing according to claim 4, characterized in that, The hopper (1) is connected to the star-shaped unloader (4b) via a corrugated hose (11).

6. A silo for powder feeding and mixing according to claim 1, characterized in that, The top of the silo (1) is equipped with a dust collector (5) to prevent powder from overflowing from the silo (1).

7. A silo for powder feeding and mixing according to claim 1, characterized in that, The top of the silo (1) is equipped with an explosion-proof valve (6).

8. A silo for powder feeding and mixing according to claim 1, characterized in that, The bottom of the medicine dispensing tank (2) is provided with at least one weighing module (21).

9. A silo for powder feeding and mixing according to claim 1, characterized in that, The mixing tank (2) is equipped with a stirring shaft (22) and a level gauge (23).

10. A silo for powder feeding and mixing according to claim 9, characterized in that, The stirring shaft (22) is parallel to the material drop trajectory of the bin (1).

11. A silo for powder feeding and mixing according to claim 1, characterized in that, The arch-breaking mechanism includes a vibration module and an air-assisted flow bowl (7) installed inside the chamber (1).

12. A silo for powder feeding and mixing according to claim 11, characterized in that, At least one air-assisted bowl (7) is provided, and the air outlet of the air-assisted bowl (7) faces one side of the central axis of the chamber (1) and is inclined upward.

13. A silo for powder feeding and mixing according to claim 12, characterized in that, The air-assisted bowl (7) is provided in several parts and arranged around the circumference of the chamber body (1).

14. A silo for powder feeding and mixing according to claim 11, characterized in that, The vibration module is at least one unit.

Images