Online discharging device of vertical fluidized bed

Abstract

The utility model discloses a vertical fluidized bed on-line discharging device which comprises a fluidized bed, a trapping chamber of the fluidized bed is connected with an air outlet loop, the air outlet loop is connected with a negative pressure source, a hopper of the fluidized bed is connected with a material temporary storage loop, and the material temporary storage loop comprises a material temporary storage bin. The material temporary storage bin is communicated with the hopper through a material suction pipe and is also communicated with the negative pressure source through a negative pressure pipe; a material suction control valve is installed on the material suction pipe, and a negative pressure control valve is installed on the negative pressure pipe. The automatic discharging device has the beneficial effects that the particle finished products can be automatically discharged in a closed environment, the pollution of dust generated in the discharging process to the production environment and the influence of the dust on the health of operators are avoided, the production cost is controlled, meanwhile, the particle finished products can be prevented from being in contact with air to generate bacterial contamination, and the quality of the particle finished products is better guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of material discharge technology, and in particular to an online material discharge device for a vertical fluidized bed. Background Technology

[0002] Fluidized beds are an indispensable production device for producing granular products. Powdered materials boil in the fluidized bed under the action of airflow, and the powdered materials come into full contact with the atomized binder or atomized slurry, so that the boiling powdered materials continuously bind to each other, thereby forming ideal, uniform porous granular products.

[0003] Currently, there are three common methods for discharging granular finished products after fluidized bed production.

[0004] 1. Raw material container tipping unloading: After fluidized bed granulation and drying are completed, all equipment functions are stopped, the hopper is manually pulled out, and the material is unloaded into a transfer hopper by manually tipping the hopper. This method requires manual transfer of the finished granules to the required workstation, resulting in a significant waste of human resources. Furthermore, the transfer process generates a large amount of dust, severely polluting the production environment and harming the health of operators.

[0005] 2. Lifting and Tilting Unloading: After fluidized bed granulation and drying, the raw material is manually pulled out and transferred to an elevator. The elevator then connects with the hopper, lifting the hopper to a certain height before tilting it to unload the material into a transfer hopper. This method is not only difficult to operate but also results in a significant waste of human resources. Furthermore, it generates a large amount of dust during the transfer of finished granules, severely polluting the production environment and harming the health of operators.

[0006] 3. Vacuum discharge: After fluidized bed granulation and drying, the material is sucked out using vacuum negative pressure. Although this method avoids the defects of the first two methods, it requires a separate vacuum station, which occupies a large area and space, thus increasing production costs. Utility Model Content

[0007] The purpose of this invention is to provide a vertical fluidized bed online discharge device that enables automatic discharge of granular finished products in a closed environment, avoiding dust pollution to the production environment and the impact on the health of operators during the discharge process, controlling production costs, and preventing bacterial contamination from contact with air, thus further ensuring the quality of the granular finished products.

[0008] A vertical fluidized bed online discharge device includes a fluidized bed, the collection chamber of which is connected to an air outlet circuit, which is connected to a negative pressure source. The key feature is that the hopper of the fluidized bed is connected to a material storage circuit, which includes a material storage bin. The material storage bin is connected to the hopper via a suction pipe, and the material storage bin is also connected to the negative pressure source via a negative pressure pipe.

[0009] A suction control valve is installed on the suction pipe, and a negative pressure control valve is installed on the negative pressure pipe.

[0010] After fluidized bed granulation and drying, the opening ratio of the exhaust air circuit is reduced, and the negative pressure control valve is opened. The material storage circuit and the exhaust air circuit share the same negative pressure power source. Under negative pressure suction, a certain amount of negative pressure is formed in the material storage chamber, and the negative pressure in the material storage chamber is greater than that in the fluidized bed. The suction control valve is opened, and the finished granules in the fluidized bed are sucked into the material storage chamber along the suction pipe under the action of negative pressure. This achieves automatic discharge of the finished granules in a closed environment, preventing finished granules from remaining in the fluidized bed and ensuring complete discharge. This avoids dust pollution to the production environment and the impact on the health of operators during the discharge process, reduces production costs, and prevents the finished granules from coming into contact with air and causing bacterial contamination, thus further ensuring the quality of the finished granules.

[0011] Meanwhile, the automatic discharge operation shares a negative pressure power source with the fluidized bed granulation and drying operations. By controlling the negative pressure control valve, the fluidized bed granulation, drying and automatic discharge operations can be switched freely, thereby reducing construction costs.

[0012] Furthermore, the fluidized bed is provided with a base, a hopper, a diffusion chamber, and a collection chamber in sequence from bottom to top;

[0013] The collection chamber is equipped with a material filter screen, and an air outlet is provided on the top of the collection chamber, which is connected to the air outlet circuit.

[0014] The hopper sidewall is provided with a discharge port and an air inlet, and both the discharge port and the air inlet are close to the bottom of the hopper.

[0015] The material filter screen can block powdery materials from entering the air outlet pipe, prevent the loss of powdery materials, and ensure the production rate of granular finished products.

[0016] Furthermore, the material storage bin is funnel-shaped, with a negative pressure filter installed at the top, a feed inlet on the side wall, and a discharge port at the bottom, where a discharge control valve is installed.

[0017] The negative pressure filter is connected to the negative pressure pipe, and the inlet is connected to the outlet via the suction pipe.

[0018] Furthermore, the negative pressure source is a negative pressure induced draft fan.

[0019] Furthermore, the air outlet circuit is provided with an air outlet pipe, one end of which is connected to the air outlet and the other end of which is connected to the negative pressure induced draft fan. An induced draft butterfly valve is installed on the air outlet pipe and is located near the air outlet.

[0020] The middle part of the air outlet pipe is connected to one end of the negative pressure pipe, and the other end of the negative pressure pipe is connected to the negative pressure filter.

[0021] Furthermore, one end of the negative pressure pipe is connected to the negative pressure fan, and the other end of the negative pressure pipe is connected to the negative pressure filter, and the negative pressure control valve is close to the negative pressure filter;

[0022] The air outlet circuit is equipped with an air outlet pipe, one end of which is connected to the air outlet, and the other end of which is connected to the middle of the negative pressure pipe. An air induced butterfly valve is installed on the air outlet pipe.

[0023] Furthermore, a discharge piston is installed at the discharge port, and the discharge piston is connected to a discharge cylinder.

[0024] The discharge cylinder controls the opening and closing of the discharge piston. During granulation and drying in the fluidized bed, the discharge piston is closed, and the powdery material comes into full contact with the mist binder or mist slurry in the fluidized bed, continuously solidifying into granules. This prevents the powdery material from entering the suction pipe, thus ensuring the quality of the finished granules.

[0025] Furthermore, a dust collector is installed at the air inlet of the negative pressure induced draft fan.

[0026] Beneficial effects: Using the negative pressure fan required in the pellet production process as a power source, the negative pressure generated when the negative pressure fan is working draws the finished pellets in the fluidized bed to the material storage bin, so that the finished pellets can be automatically discharged in a closed environment. This avoids the pollution of the production environment and the impact on the health of operators caused by dust generated during the discharge process, and reduces production costs. At the same time, it can also prevent the finished pellets from coming into contact with air and causing bacterial contamination, thus further ensuring the quality of the finished pellets. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of this utility model;

[0028] Figure 2 for Figure 1 Sectional view of part a. Detailed Implementation

[0029] The specific embodiments and working principle of this utility model will be further described in detail below with reference to the accompanying drawings.

[0030] like Figure 1As shown, the vertical fluidized bed online discharge device includes a fluidized bed 1, which is provided with a base 1a, a hopper 1b, a diffusion chamber 1c and a collection chamber 1d from bottom to top. A material filter screen is installed in the collection chamber 1d, and an air outlet 1d1 is provided at the top of the collection chamber 1d. The air outlet 1d1 is connected to the air outlet circuit, and the air outlet circuit is connected to the negative pressure induced draft fan 11.

[0031] like Figure 1 , 2 As shown, the side wall of the hopper 1b is provided with a discharge port 1b1 and an air inlet, and both the discharge port 1b1 and the air inlet are close to the bottom of the hopper 1b. A discharge piston 12 is provided at the discharge port 1b1, and the discharge piston 12 is connected to a discharge cylinder 13, which controls the discharge piston 12 to close.

[0032] The discharge port 1b1 is connected to the material storage bin 2 via the suction pipe 4. The material storage bin 2 is funnel-shaped, with a negative pressure filter 3 installed at the top, a feed port 2a on the side wall, and a discharge port 2b at the bottom. A discharge control valve 2c is installed at the discharge port 2b.

[0033] The negative pressure filter 3 is connected to the negative pressure fan 11 via the negative pressure pipe 6, and a negative pressure control valve 7 is installed on the negative pressure pipe 6.

[0034] The feed inlet 2a is connected to one end of the suction pipe 4, and the other end of the suction pipe 4 is connected to the discharge outlet 1b1. A suction control valve 5 is installed on the suction pipe 4.

[0035] Example 1:

[0036] like Figure 1 As shown, the air outlet circuit is provided with an air outlet pipe 8. One end of the air outlet pipe 8 is connected to the air outlet 1d1, and the other end of the air outlet pipe 8 is connected to the inlet of the dust collector 10. The outlet of the dust collector 10 is connected to the air inlet of the negative pressure induced draft fan 11, and an induced draft butterfly valve 9 is installed on the air outlet pipe 8 near the air outlet 1d1.

[0037] The middle part of the air outlet pipe 8 is connected to one end of the negative pressure pipe 6, and the other end of the negative pressure pipe 6 is connected to the negative pressure filter 3.

[0038] Example 2:

[0039] One end of the negative pressure pipe 6 is connected to the inlet of the dust collector 10, the outlet of the dust collector 10 is connected to the air inlet of the negative pressure induced draft fan 11, the other end of the negative pressure pipe 6 is connected to the negative pressure filter 3, and the negative pressure control valve 7 is close to the negative pressure filter 3.

[0040] The air outlet circuit is provided with an air outlet pipe 8. One end of the air outlet pipe 8 is connected to the air outlet 1d1, and the other end of the air outlet pipe 8 is connected to the middle of the negative pressure pipe 6. An air induced butterfly valve 9 is installed on the air outlet pipe 8.

[0041] In the above embodiment, after the granulation and drying operations in fluidized bed 1 are completed, the negative pressure induced draft fan 11 continues to operate, the opening ratio of the induced draft butterfly valve 9 is reduced, and the negative pressure control valve 7 is fully opened to create a certain amount of negative pressure in the material storage bin 2. This negative pressure in the material storage bin 2 is ensured to be greater than that in fluidized bed 1. Then, the suction control valve 5 is opened, and the discharge cylinder 13 is opened to open the discharge piston 12. Under the action of negative pressure, the finished granules in fluidized bed 1 are drawn along the suction pipe 4 to the material storage bin 2, achieving automatic discharge of the finished granules in a closed environment. Simultaneously, the greater negative pressure in the material storage bin 2 compared to the fluidized bed 1 prevents finished granules from remaining in the hopper 1b, ensuring complete discharge of the finished granules.

Claims

1. A vertical fluidized bed on-line discharge device, comprising a fluidized bed (1), a catch chamber (1d) of the fluidized bed (1) being connected with an air outlet circuit, the air outlet circuit being connected with a negative pressure source, characterized in that, The hopper (1b) of the fluidized bed (1) is connected to a material storage circuit, which includes a material storage bin (2). The material storage bin (2) is connected to the hopper (1b) via a suction pipe (4). The material storage bin (2) is also connected to the negative pressure source via a negative pressure pipe (6). A suction control valve (5) is installed on the suction pipe (4), and a negative pressure control valve (7) is installed on the negative pressure pipe (6).

2. The vertical fluidized bed on-line dosing device according to claim 1, characterized in that, The fluidized bed (1) is provided with a base (1a), a hopper (1b), a diffusion chamber (1c) and a collection chamber (1d) from bottom to top. The collection chamber (1d) is equipped with a material filter screen, and the top of the collection chamber (1d) is provided with an air outlet (1d1), which is connected to the air outlet circuit. The hopper (1b) has a discharge port (1b1) and an air inlet on its side wall, and both the discharge port (1b1) and the air inlet are close to the bottom of the hopper (1b).

3. The vertical fluidized bed on-line dosing device according to claim 2, characterized in that The material storage bin (2) is funnel-shaped, with a negative pressure filter (3) installed at the top, a feed inlet (2a) on the side wall, and a discharge port (2b) at the bottom. A discharge control valve (2c) is installed at the discharge port (2b). The negative pressure filter (3) is connected to the negative pressure pipe (6), and the feed inlet (2a) is connected to the discharge outlet (1b1) via the suction pipe (4).

4. The vertical fluidized bed on-line dosing device according to claim 3, characterized in that The negative pressure source is a negative pressure exhaust fan (11).

5. The vertical fluidized bed on-line dosing device according to claim 4, characterized in that The air outlet circuit is provided with an air outlet pipe (8), one end of which is connected to the air outlet (1d1), and the other end of which is connected to the negative pressure induced draft fan (11). An induced draft butterfly valve (9) is installed on the air outlet pipe (8), and the induced draft butterfly valve (9) is close to the air outlet (1d1). The middle part of the air outlet pipe (8) is connected to one end of the negative pressure pipe (6), and the other end of the negative pressure pipe (6) is connected to the negative pressure filter (3).

6. The vertical fluidized bed on-line dosing device according to claim 4, characterized in that One end of the negative pressure pipe (6) is connected to the negative pressure fan (11), and the other end of the negative pressure pipe (6) is connected to the negative pressure filter (3), and the negative pressure control valve (7) is close to the negative pressure filter (3). The air outlet circuit is provided with an air outlet pipe (8), one end of which is connected to the air outlet (1d1), and the other end of which is connected to the middle of the negative pressure pipe (6). An air induced butterfly valve (9) is installed on the air outlet pipe (8).

7. The vertical fluidized bed on-line dosing device according to claim 2, characterized in that, A discharge piston (12) is installed at the discharge port (1b1), and the discharge piston (12) is connected to a discharge cylinder (13).

8. The vertical fluidized bed on-line dosing device according to claim 4, characterized in that, A dust collector (10) is installed at the air inlet of the negative pressure induced draft fan (11).

Images