Inert gas pneumatic conveying system

Abstract

The utility model belongs to the technical field of pneumatic conveying, and particularly relates to an inert gas pneumatic conveying system. When the reaction kettle is used, feeding is performed through the temporary storage hopper, negative pressure is generated through the roots vacuum pump, inert gas moves in the circulation pipeline, materials in the temporary storage hopper are conveyed into the transition hopper, the inert gas and the materials are separated through the gas-solid separator, and the materials enter the reaction kettle through the transition hopper. The inert gas is led to the roots vacuum pump along with the circulating pipeline and finally reaches the normal-pressure gas storage tank, the inert gas is continuously supplied to the temporary storage hopper, and if the first inert gas concentration detector detects that the concentration of the inert gas in the normal-pressure gas storage tank is too low, the inert gas is supplied to the normal-pressure gas storage tank through the high-pressure gas supplementing tank; the concentration of inert gas in the normal-pressure gas storage tank is kept stable; according to the system, cyclic utilization of inert gas is achieved, the using amount of the inert gas is reduced, and the cost of pneumatic conveying is greatly reduced.

Description

An inert gas pneumatic conveying system Technical Field

[0001] This utility model belongs to the field of pneumatic conveying technology, specifically relating to an inert gas pneumatic conveying system. Background Technology

[0002] In the production processes of industries such as chemical, pharmaceutical, and food, raw materials, intermediate materials, and finished products often exist in powder form. Air is often used as the transport medium for powder materials. During the transport process, a dust explosion environment can easily be formed. Once it encounters sparks, static electricity, or other forms of energy accumulation, it can react violently with gaseous oxidants such as air, releasing a large amount of energy instantly and causing a dust explosion.

[0003] In the existing technology, inert gases are used for transportation to ensure the safety of transportation, such as nitrogen and carbon dioxide, as the transport carrier for combustible dust. However, the amount of inert gas used is large, and the operating cost is relatively high.

[0004] In view of this, there is an urgent need for an inert gas pneumatic conveying system. Summary of the Invention

[0005] In view of the problems in the prior art, this utility model provides an inert gas pneumatic conveying system to solve the problems in the prior art.

[0006] To achieve the above technical objectives, the technical solution of this utility model is as follows:

[0007] An inert gas pneumatic conveying system includes a circulation pipeline, a temporary storage hopper, a transition hopper, a reaction vessel, a gas-solid separator, a Roots vacuum pump, an atmospheric pressure gas storage tank, a high-pressure gas replenishment tank, and a first inert gas concentration detector. The temporary storage hopper, the transition hopper, the gas-solid separator, the Roots vacuum pump, and the atmospheric pressure gas storage tank are sequentially arranged on the conveying path of the circulation pipeline.

[0008] The feed inlet of the reactor is connected to the discharge outlet of the transition hopper;

[0009] The first inert gas concentration detector is used to detect the inert gas concentration in the atmospheric pressure gas storage tank, and the high-pressure gas replenishment tank is connected to the atmospheric pressure gas storage tank.

[0010] A filter is installed on the circulation pipeline, and the filter is located between the Roots vacuum pump and the atmospheric pressure storage tank.

[0011] The gas-solid separator is located at the top of the transition hopper.

[0012] A dust collector is installed on the top of the temporary storage hopper.

[0013] The temporary storage hopper is equipped with an arch-breaking device.

[0014] The temporary storage hopper is equipped with a second inert gas concentration detector.

[0015] An inert gas replenishment device is connected to the temporary storage hopper.

[0016] A Z-shaped conveyor is provided on one side of the temporary storage hopper, and the discharge end of the Z-shaped conveyor is connected to the top of the temporary storage hopper.

[0017] The Z-type conveyor is equipped with a ton bag unpacking machine at the feeding end.

[0018] The transition hopper is equipped with a high level gauge and a low level gauge.

[0019] The above-described structure of this utility model can achieve the following beneficial effects:

[0020] In operation, material is fed through a temporary storage hopper. A negative pressure is generated by a Roots vacuum pump, causing inert gas to circulate in the circulation pipeline, transporting the material in the temporary storage hopper to a transition hopper. A gas-solid separator separates the inert gas from the material. The material then enters the reactor through the transition hopper, while the inert gas, circulating through the pipeline, flows to the Roots vacuum pump and finally reaches the atmospheric pressure storage tank. Inert gas is continuously supplied to the temporary storage hopper. If the first inert gas concentration detector detects that the inert gas concentration in the atmospheric pressure storage tank is too low, inert gas is supplied to the atmospheric pressure storage tank through a high-pressure replenishment tank to maintain a stable inert gas concentration. This system achieves the recycling of inert gas, reducing the amount of inert gas used and significantly lowering the cost of pneumatic conveying. Attached Figure Description

[0021] Figure 1 is a structural schematic diagram of an embodiment of the present utility model;

[0022] Figure 2 is a schematic diagram of the structure of the temporary storage hopper in an embodiment of this utility model.

[0023] In the diagram: 1. Circulation pipeline; 2. Temporary storage hopper; 3. Transition hopper; 4. Reactor; 5. Gas-solid separator; 6. Roots vacuum pump; 7. Atmospheric pressure gas storage tank; 8. High pressure gas replenishment tank; 9. First inert gas concentration detector; 10. Filter; 11. Dust collector; 12. Arch breaking device; 13. Second inert gas concentration detector; 14. Inert gas replenishment device; 15. Z-type conveyor; 16. Ton bag unpacking machine; 17. High level gauge; 18. Low level gauge. Detailed Implementation

[0024] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0025] It should be noted that the terms "comprising" and "having" and any variations thereof in the specification, claims and accompanying drawings of this utility model are intended to cover non-exclusive inclusion. For example, a process, method, apparatus, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such processes, methods, products or devices.

[0026] The present application will be further described in detail below with reference to Figures 1-2.

[0027] Referring to Figure 1, an inert gas pneumatic conveying system includes a circulation pipeline 1, a temporary storage hopper 2, a transition hopper 3, a reaction vessel 4, a gas-solid separator 5, a Roots vacuum pump 6, an atmospheric pressure gas storage tank 7, a high pressure gas replenishment tank 8, and a first inert gas concentration detector 9. The temporary storage hopper 2, the transition hopper 3, the gas-solid separator 5, the Roots vacuum pump 6, and the atmospheric pressure gas storage tank 7 are sequentially arranged on the conveying path of the circulation pipeline 1, and the gas-solid separator 5 is arranged at the top of the transition hopper 3.

[0028] The feed inlet of the reactor 4 is connected to the discharge outlet of the transition hopper 3 by a discharge rotary valve. The transition hopper 3 is equipped with a high level gauge 17 and a low level gauge 18 to monitor the height of the material in the transition hopper 3 in real time.

[0029] The first inert gas concentration detector 9 is used to detect the inert gas concentration in the atmospheric pressure gas storage tank 7. The high-pressure gas replenishment tank 8 is connected to the atmospheric pressure gas storage tank 7.

[0030] A filter 10 is installed on the circulation pipeline 1, and the filter 10 is located between the Roots vacuum pump 6 and the atmospheric pressure storage tank 7.

[0031] Based on the above structure, during use, material is fed through the temporary storage hopper 2. A negative pressure is generated by the Roots vacuum pump 6, causing the inert gas to move within the circulation pipeline 1, transporting the material in the temporary storage hopper 2 to the transition hopper 3. The inert gas is separated from the material by the gas-solid separator 5. The material then enters the reaction vessel 4 through the transition hopper 3. The inert gas travels through the circulation pipeline 1 to the Roots vacuum pump 6, finally reaching the atmospheric pressure storage tank 7. Inert gas is continuously supplied to the temporary storage hopper 2. If the first inert gas concentration detector 9 detects that the inert gas concentration in the atmospheric pressure storage tank 7 is too low, inert gas is supplied to the atmospheric pressure storage tank 7 through the high-pressure replenishment tank 8 to maintain a stable inert gas concentration. This system achieves the recycling of inert gas, reducing the amount of inert gas used and significantly lowering the cost of pneumatic conveying.

[0032] As shown in Figures 1 and 2, a dust collector 11 is installed on the top of the temporary storage hopper 2. Since dust is generated during the unpacking of materials, the dust collector 11 is used to remove dust and keep the temporary storage hopper 2 clean.

[0033] As shown in Figures 1 and 2, an arch-breaking device 12 is installed in the temporary storage hopper 2 to solve the problem of material arching in the temporary storage hopper 2 and ensure that the material can flow smoothly to the circulation pipeline 1. The arch-breaking device 12 can be a rod-type arch-breaking device.

[0034] As shown in Figures 1 and 2, a second inert gas concentration detector 13 is installed on the temporary storage hopper 2 to detect the inert gas concentration in the temporary storage hopper 2. An inert gas replenishment device 14 is connected to the temporary storage hopper 2 to replenish the inert gas in time when the inert gas concentration in the temporary storage hopper 2 is low, so as to maintain the balance of the inert gas concentration in the temporary storage hopper 2.

[0035] As shown in Figure 1, since the feed inlet of the temporary storage hopper 2 is located at a high position, a Z-type conveyor 15 is installed on one side of the temporary storage hopper 2. The discharge end of the Z-type conveyor 15 is connected to the top of the temporary storage hopper 2. The Z-type conveyor 15 lifts the material and puts it into the temporary storage hopper 2. A ton bag unpacking machine 16 is installed at the feeding end of the Z-type conveyor 15 to unpack the bags and place the material at the feeding end of the Z-type conveyor 15 through the discharge valve, thereby further improving the material processing efficiency.

[0036] A further optimization is that a direct-blowing conveyor is installed at the discharge end of the temporary storage hopper 2 to transfer the material into the circulation pipeline 1.

[0037] In summary, during operation, material is fed through the temporary storage hopper 2. A negative pressure is generated by the Roots vacuum pump 6, causing inert gas to circulate within the circulation pipeline 1, transporting the material from the temporary storage hopper 2 to the transition hopper 3. The gas-solid separator 5 separates the inert gas from the material. The material then enters the reaction vessel 4 through the transition hopper 3. The inert gas, along with the circulation pipeline 1, flows to the Roots vacuum pump 6 and finally reaches the atmospheric pressure storage tank 7, continuously supplying inert gas towards the temporary storage hopper 2. If the first inert gas concentration detector 9 detects that the inert gas concentration in the atmospheric pressure storage tank 7 is too low, inert gas is supplied to the atmospheric pressure storage tank 7 through the high-pressure replenishment tank 8 to maintain a stable inert gas concentration. This system achieves the recycling of inert gas, reducing the amount of inert gas used and significantly lowering the cost of pneumatic conveying.

[0038] Furthermore, the use of inert gas for transportation ensures the safety of transporting hazardous chemicals.

[0039] The above are merely preferred embodiments of this application, and the present invention is not limited to the above embodiments. It is understood that other improvements and variations that can be directly derived or conceived by those skilled in the art without departing from the spirit and concept of the present invention should be considered to be included within the protection scope of the present invention.

Claims

1. An inert gas pneumatic conveying system, characterized in that: The system includes a circulation pipeline (1), a temporary storage hopper (2), a transition hopper (3), a reactor (4), a gas-solid separator (5), a Roots vacuum pump (6), an atmospheric pressure gas storage tank (7), a high-pressure gas replenishment tank (8), and a first inert gas concentration detector (9). The temporary storage hopper (2), the transition hopper (3), the gas-solid separator (5), the Roots vacuum pump (6), and the atmospheric pressure gas storage tank (7) are sequentially arranged on the conveying path of the circulation pipeline (1). The inlet of the reactor (4) is connected to the outlet of the transition hopper (3). The first inert gas concentration detector (9) is used to detect the inert gas concentration in the atmospheric pressure gas storage tank (7). The high-pressure gas replenishment tank (8) is connected to the atmospheric pressure gas storage tank (7).

2. The inert gas pneumatic conveying system according to claim 1, characterized in that: A filter (10) is installed on the circulation pipeline (1), and the filter (10) is located between the Roots vacuum pump (6) and the atmospheric pressure storage tank (7).

3. The inert gas pneumatic conveying system according to claim 1, characterized in that: The gas-solid separator (5) is located on top of the transition hopper (3).

4. The inert gas pneumatic conveying system according to claim 1, characterized in that: A dust collector (11) is provided on the top of the temporary storage hopper (2).

5. The inert gas pneumatic conveying system according to claim 1, characterized in that: The temporary storage hopper (2) is equipped with an arch-breaking device (12).

6. The inert gas pneumatic conveying system according to claim 1, characterized in that: The temporary storage hopper (2) is equipped with a second inert gas concentration detector (13).

7. The inert gas pneumatic conveying system according to claim 6, characterized in that: An inert gas replenishment device (14) is connected to the temporary storage hopper (2).

8. The inert gas pneumatic conveying system according to claim 1, characterized in that: A Z-type conveyor (15) is provided on one side of the temporary storage hopper (2), and the discharge end of the Z-type conveyor (15) is connected to the top of the temporary storage hopper (2).

9. The inert gas pneumatic conveying system according to claim 8, characterized in that: The Z-type conveyor (15) is equipped with a ton bag unpacking machine (16) at the feeding end.

10. The inert gas pneumatic conveying system according to claim 1, characterized in that: The transition hopper (3) is equipped with a high level gauge (17) and a low level gauge (18).

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