Automatic adding system for cold hydrogenation catalyst

Abstract

The utility model provides an automatic adding system for a cold hydrogenation catalyst, and relates to the technical field of cold hydrogenation processes. The device comprises a storage tank, a metering tank communicated with the storage tank through a pipeline, a screw conveyer communicated with the metering tank through a pipeline, a sending tank communicated with a discharge port of the screw conveyer through a pipeline, and a catalyst in a ton bag is added into the storage tank and input into the metering tank through a pipeline. The catalyst in the metering tank is input into the screw conveyer through a pipeline, the catalyst in the screw conveyer is input into the sending tank through a pipeline, and pneumatic conveying equipment is arranged on the pipeline between the storage tank and the metering tank. According to the utility model, the catalyst does not need to be manually and repeatedly added everyday, and the toxicity and corrosivity of the catalyst are prevented from hurting personnel.

Description

Technical Field

[0001] This utility model relates to the field of cold hydrogenation process technology, specifically to an automatic cold hydrogenation catalyst addition system. Background Technology

[0002] Currently, the polysilicon production technology used in my country is primarily the modified Siemens process, which accounts for over 80% of the country's total polysilicon production. A crucial step in the modified Siemens process is cold hydrogenation. Cold hydrogenation involves mixing and heating hydrogen and silicon tetrachloride, then subjecting them to an endothermic reaction with silicon powder in a fluidized bed reactor at 530℃-560℃ and 2.5MPa-3.0MPa. This reaction requires the addition of a certain proportion of catalyst to improve the conversion rate.

[0003] In existing technologies, during the cold hydrogenation production process, the catalyst is added manually to a catalyst silo, which is then fed into the silicon powder via a feeder. This method is labor-intensive, requiring manual addition of only 20-60 kg at a time, and involves repeated additions daily at irregular times. Furthermore, the catalyst is toxic and corrosive, posing a risk of injury to workers. The addition process also generates catalyst dust, leading to environmental pollution. Utility Model Content

[0004] The purpose of this invention is to develop an automated cold hydrogenation catalyst addition system that eliminates the need for manual, daily catalyst addition and avoids the risk of harm to personnel from the toxicity and corrosiveness of the catalyst.

[0005] This utility model is achieved through the following technical solution:

[0006] An automated cold hydrogenation catalyst addition system includes:

[0007] Storage tanks;

[0008] Metering tank, connected to the storage tank pipeline;

[0009] The screw conveyor is connected to the metering tank pipeline;

[0010] The sending tank is connected to the discharge pipe of the screw conveyor.

[0011] The catalyst in ton bags is added to the storage tank, the catalyst in the storage tank is fed into the metering tank through a pipeline, the catalyst in the metering tank is fed into the screw conveyor through a pipeline, the catalyst in the screw conveyor is fed into the delivery tank through a pipeline, and a pneumatic conveying device is installed in the pipeline between the storage tank and the metering tank.

[0012] Optionally, the pneumatic conveying equipment includes a buffer tank, on which a nitrogen source and a nitrogen pipe are connected. The nitrogen pipe is equipped with a pressure regulating mechanism and is connected to the pipeline between the storage tank and the metering tank.

[0013] Optionally, a valve is provided on the pipeline between the metering tank and the screw conveyor, and a weighing device is provided at the bottom of the metering tank.

[0014] Optionally, both the storage tank and the metering tank are equipped with suction pipes at the top, and the suction pipes are equipped with fans.

[0015] Optionally, the end of the suction pipe is connected to a dust collection device, which is a bag filter dust collector.

[0016] Optionally, both the storage tank and the metering tank are provided with steam jackets on their outer walls, and steam pipes are connected to the steam jackets.

[0017] Optionally, the discharge port of the screw conveyor is connected to a first sending tank and a second sending tank.

[0018] The beneficial effects of this utility model are:

[0019] This invention eliminates the need for daily manual addition of catalyst. Instead, catalyst can be added to the storage tank once a month using a forklift. The catalyst is automatically conveyed and added pneumatically, significantly reducing manual labor intensity, minimizing contact between personnel and the catalyst, preventing harm to personnel health, and greatly reducing the frequency of catalyst additions. It also prevents catalyst spillage into the environment. Dust generated during catalyst feeding and conveying is collected by suction pipes, preventing environmental pollution. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application 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 application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of this utility model.

[0022] Reference numerals in the attached diagram: 1. Nitrogen source; 2. Buffer tank; 3. Pressure regulating mechanism; 4. Storage tank; 5. Metering tank; 6. Conveyor; 7. First sending tank; 8. Second sending tank; 9. Suction pipe; 10. Fan; 11. Nitrogen pipe. Detailed Implementation

[0023] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0025] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0026] like Figure 1 As shown, this utility model discloses an automatic cold hydrogenation catalyst addition system, including a storage tank 4, a metering tank 5 and a screw conveyor 6. The bottom outlet of the storage tank 4 is connected to the top inlet of the metering tank 5 via a pipeline. The bottom outlet of the metering tank 5 is connected to the inlet of the screw conveyor 6. The outlet of the screw conveyor 6 is connected to a first sending tank 7 and a second sending tank 8.

[0027] Both storage tank 4 and metering tank 5 are equipped with steam jackets on their outer walls, and steam pipes are connected to the steam jackets. Steam entering the steam jackets through the steam pipes heats storage tank 4 and metering tank 5, keeping the catalyst inside storage tank 4 and metering tank 5 dry.

[0028] A valve is installed on the pipeline between the metering tank 5 and the screw conveyor 6. A weighing device is installed at the bottom of the metering tank 5. After the weighing device weighs the catalyst in the metering tank 5 to the set weight, the valve is opened to send the catalyst in the metering tank 5 into the screw conveyor 6. The screw conveyor 6 then sends the catalyst into the first sending tank 7 and the second sending tank 8, thus completing the automatic addition of the catalyst.

[0029] Both the storage tank 4 and the metering tank 5 are equipped with suction pipes 9 at their tops. A fan 10 is mounted on each suction pipe 9, and the end of the suction pipe 9 is connected to a dust collection device, which can be a baghouse dust collector. When a ton-sized amount of catalyst is added to the storage tank 4, or when the catalyst in the storage tank 4 is transferred to the metering tank 5, the fan 10 operates, and the suction pipe 9 draws in the dust from the storage tank 4 or the metering tank 5. The raised catalyst particles are then drawn into the dust collection device.

[0030] A pneumatic conveying device is installed in the pipeline between storage tank 4 and metering tank 5, so that the catalyst in storage tank 4 can be pneumatically conveyed to metering tank 5. The pneumatic conveying device includes a buffer tank 2, which is connected to a nitrogen source 1 and a nitrogen pipe 11. The nitrogen source 1 delivers nitrogen gas at a certain pressure to the buffer tank 2. The nitrogen pipe 11 is equipped with a pressure regulating mechanism 3 and is connected to the pipeline at the bottom outlet of storage tank 4. The pressure regulating mechanism 3 adjusts the nitrogen pressure in nitrogen pipe 11, and nitrogen pipe 11 introduces nitrogen gas into the pipeline between storage tank 4 and metering tank 5 to realize the pneumatic conveying of catalyst.

[0031] This invention eliminates the need for daily manual addition of catalyst. Instead, catalyst can be added to storage tank 4 once a month using a forklift. The catalyst is automatically conveyed and added pneumatically, significantly reducing manual labor intensity, minimizing contact between personnel and the catalyst, preventing harm to personnel health, and greatly reducing the frequency of catalyst additions. It also prevents catalyst spillage into the environment. Dust generated during catalyst feeding and conveying is collected by suction pipe 9, preventing environmental pollution.

[0032] The above embodiments are merely preferred embodiments of this utility model and are not intended to limit the technical solutions of this utility model. Any technical solution that can be implemented based on the above embodiments without creative effort should be considered to fall within the scope of protection of this utility model patent.

Claims

1. An automated cold hydrogenation catalyst addition system, characterized in that, include: Storage tanks; Metering tank, connected to the storage tank pipeline; The screw conveyor is connected to the metering tank pipeline; The sending tank is connected to the discharge pipe of the screw conveyor. The catalyst in ton bags is added to the storage tank, the catalyst in the storage tank is fed into the metering tank through a pipeline, the catalyst in the metering tank is fed into the screw conveyor through a pipeline, the catalyst in the screw conveyor is fed into the delivery tank through a pipeline, and a pneumatic conveying device is installed in the pipeline between the storage tank and the metering tank.

2. The automatic cold hydrogenation catalyst addition system according to claim 1, characterized in that, The pneumatic conveying equipment includes a buffer tank, on which a nitrogen source and a nitrogen pipe are connected. The nitrogen pipe is equipped with a pressure regulating mechanism and is connected to the pipeline between the storage tank and the metering tank.

3. The automatic cold hydrogenation catalyst addition system according to claim 1, characterized in that, A valve is installed on the pipeline between the metering tank and the screw conveyor, and a weighing device is installed at the bottom of the metering tank.

4. The automatic cold hydrogenation catalyst addition system according to claim 1, characterized in that, Both the storage tank and the metering tank are equipped with suction pipes at the top, and the suction pipes are equipped with fans.

5. The automatic cold hydrogenation catalyst addition system according to claim 4, characterized in that, The end of the suction pipe is connected to a dust collection device, which is a bag filter dust collector.

6. The automatic cold hydrogenation catalyst addition system according to claim 1, characterized in that, Both the storage tank and the metering tank are equipped with steam jackets on their outer walls, and steam pipes are connected to the steam jackets.

7. The automatic cold hydrogenation catalyst addition system according to claim 1, characterized in that, The screw conveyor outlet is connected to a first sending tank and a second sending tank.

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