Powder feeding device for sealed reaction kettle

Abstract

The utility model discloses a kind of closed reaction kettle powder feeding devices, first feeding pipe one end is sealedly connected with powder material source through first hose, the butt joint of first feeding pipe and powder material source is facilitated, powder is sent into first feeding pipe, the other end of first feeding pipe is sealedly connected with reaction kettle, and nitrogen gas pipe is passed through and is inhaled nitrogen gas stream into first feeding pipe, powder in first feeding pipe is transported to with reaction kettle in and completes feeding, in whole feeding process, powder is all completed conveying in closed first feeding pipe, only contact with nitrogen gas stream, the problem that existing technology exists powder feeding process is exposed in air is solved, realize powder air-tight feeding, first ball valve is equipped between first hose and powder material source, when replacing powder material source, first ball valve is closed first, to prevent external air from entering first feeding pipe inside during powder material source replacement process, realize the switching between powder material source and different packaging specifications of powder.

Description

Technical Field

[0001] This utility model belongs to the field of powder material feeding technology, and relates to a powder feeding device, specifically a closed reaction vessel powder feeding device. Background Technology

[0002] In the production processes of reaction vessels in chemical and pharmaceutical industries, achieving closed-loop feeding of powder materials is crucial for ensuring product quality. Currently, commonly used powder feeding technologies have significant drawbacks: the traditional open funnel feeding method involves manually or by gravity feeding using an open funnel installed at the top of the reaction vessel. This method is only suitable for small-batch applications, and the powder is exposed to air throughout the feeding process, making it highly susceptible to moisture absorption and agglomeration. This can trigger side reactions in moisture-sensitive reaction systems, and also poses risks of volatile component release, dust explosions, and operational health hazards. For large-volume feeding, the industry often uses electric hoists to lift and feed powder into ton containers from the top of the reactor. While this method can handle large batches, it cannot accurately measure the weight of the powder, and the feeding amount depends on the nominal weight of the ton container, making real-time adjustment difficult. In addition, this method cannot be adapted to small packages of powder with different packaging specifications, and the dedicated interface limits the switching of packaging forms. When changing powder, production must be interrupted and pipelines modified. At the same time, the connection between the ton container and the reactor is often not airtight, and nitrogen protection is not thorough, so residual powder can still be exposed to air at the end of the feeding process.

[0003] In summary, these shortcomings of existing technologies severely restrict the process stability and operational flexibility of high-end chemical production, especially in continuous production scenarios that require strict isolation of oxygen / moisture and mixed feeding of different powder packaging specifications. Existing solutions are difficult to meet industrialization requirements. Utility Model Content

[0004] To address the technical problems existing in the background art, this utility model proposes a closed reaction vessel powder feeding device, which realizes the feeding and accurate metering of powder in the absence of air by means of nitrogen gas flow.

[0005] The objective of this utility model can be achieved through the following technical solutions:

[0006] A closed reactor powder feeding device includes: a first feeding pipe and a nitrogen pipe. One end of the first feeding pipe is sealed to a powder material source via a first flexible hose, and the other end is sealed to the feed inlet of the reactor via a flange. A first ball valve is provided between the first flexible hose and the powder material source. One end of the nitrogen pipe is sealed to the first feeding pipe, and the other end is sealed to the nitrogen source, so as to introduce a nitrogen gas flow into the first feeding pipe to transport the powder from the powder material source to the reactor.

[0007] Furthermore, the powder material source adopts a powder ton container, the discharge port of the powder ton container is detachably connected to the first ball valve, and a ground scale is installed at the bottom of the powder ton container.

[0008] Furthermore, the powder material source is small-packaged powder, and a second feeding pipe is provided between the small-packaged powder and the first ball valve. One end of the second feeding pipe is sealed to the small-packaged powder through a second flexible hose, and the other end is sealed to the first ball valve.

[0009] Furthermore, a second ball valve is provided between the second hose and the small bag of powder, and the outlet of the small bag of powder is detachably connected to the second ball valve. A third ball valve is provided between the second feeding pipe and the first ball valve, and the third ball valve is detachably connected to the first ball valve.

[0010] Furthermore, the small powder packets are suspended above the second feeding pipe by a crane, and a ground scale is installed at the bottom of the crane.

[0011] Furthermore, the nitrogen pipe is connected to the first feeding pipe near the powder material source. A baffle is provided at the connection between the nitrogen pipe and the first feeding pipe. Multiple air holes are distributed on the baffle, and the diameter of the air holes is smaller than the diameter of the powder.

[0012] Furthermore, a flow regulating valve is installed on the nitrogen pipeline.

[0013] Furthermore, a third feeding pipe is provided inside the feed inlet of the reactor. One end of the third feeding pipe is sealed to the first feeding pipe through a flange, and the other end extends vertically into the interior of the reactor.

[0014] Furthermore, the third feeding pipe has a bend that curves horizontally at one end into the reactor, and a nozzle is connected to the bend, with the nozzle diameter gradually increasing from the inside to the outside.

[0015] The beneficial effects of this utility model are as follows: This application provides a closed reactor powder feeding device. One end of the first feeding pipe is sealed to the powder material source through a first flexible hose, which facilitates the connection between the first feeding pipe and the powder material source, allowing the powder to be fed into the first feeding pipe. The other end of the first feeding pipe is sealed to the reactor, and nitrogen gas is introduced into the first feeding pipe through a nitrogen pipe to transport the powder in the first feeding pipe to the reactor to complete the feeding process. Throughout the feeding process, the powder is transported within the sealed first feeding pipe and only comes into contact with the nitrogen gas flow, solving the problem of the powder being exposed to air during the feeding process in the prior art. This achieves air-isolated powder feeding. A first ball valve is provided between the first flexible hose and the powder material source. When changing the powder material source, the first ball valve is closed first to prevent outside air from entering the first feeding pipe during the powder material source change process, thus realizing the switching between powders of different packaging specifications. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall design of this utility model.

[0017] Figure 2 This is a schematic diagram of the present invention when connecting the powder ton container.

[0018] Figure 3 This is a schematic diagram of the connection of small powder packets according to this utility model.

[0019] Figure 4 This is a schematic diagram of the third feeding tube of this utility model. Detailed Implementation

[0020] The technical solutions of the present utility model 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 utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0021] like Figure 1 As shown, this utility model provides a closed reactor powder feeding device, including: a first feeding pipe 1, one end of which is sealed to a powder material source via a first flexible hose 3. The first flexible hose 3 facilitates the connection between the first feeding pipe 1 and the powder material source. Existing powder material sources generally have nitrogen feeding capabilities to deliver powder into the first feeding pipe 1. The other end of the first feeding pipe 1 is sealed to the inlet 51 of the reactor 5 via a flange 4. The powder provided by the powder material source can be fed into the closed reactor 5 through the first feeding pipe 1, solving the problem of powder exposure to air during the feeding process in existing technologies and achieving air-isolated powder feeding.

[0022] However, since the reactor 5 is usually installed on a second-floor platform at a certain height above the ground, and the feed inlet 51 is located on the top of the reactor 5, while the powder material source is generally placed on the ground floor, the nitrogen feeding function of the powder material source can only feed the powder into the first feeding pipe 1. Therefore, a nitrogen pipe 2 is also provided at the end of the first feeding pipe 1 near the powder material source. One end of the nitrogen pipe 2 is sealed to the first feeding pipe 1, and the other end is sealed to the nitrogen source, so as to introduce nitrogen gas flow into the first feeding pipe 1 and drive the powder to be conveyed in the first feeding pipe 1 through the nitrogen gas flow, conveying the powder from the end connected to the powder material source to the end connected to the reactor 5, and feeding it into the sealed reactor 5 through the feed inlet 51.

[0023] A first ball valve 6 is provided between the first hose 3 and the powder material source. When it is necessary to replace the powder material source, the first ball valve 6 should be closed first to prevent outside air from entering the first feeding pipe 1 during the replacement of the powder material source. The powder material source can be selected from powder ton drums, small bags, or a mixture of both with different packaging specifications.

[0024] When the powder material source is a powder ton container, such as Figure 2 As shown, the discharge port of the powder ton is detachably connected to the first ball valve 6. When replacing the powder ton, simply close the first ball valve 6, remove it from the old powder ton, seal it, install it on the new powder ton, and then open it. A weighing scale is installed at the bottom of the powder ton to weigh the powder ton, thereby accurately measuring the powder added to the reactor 5.

[0025] When the powder material source is small-packaged powder, such as Figure 3 As shown, a second feeding pipe 7 is provided between the small powder package and the first ball valve 6. One end of the second feeding pipe 7 is sealed to the small powder package via a second flexible hose 8, which facilitates the connection between the second feeding pipe 7 and the small powder package. The other end of the second feeding pipe 7 is sealed to the first ball valve 6. When the first ball valve 6 is opened, the small powder package can be fed into the first feeding pipe 1 through the second feeding pipe 7. A second ball valve 9 is provided between the second flexible hose 8 and the small powder package. The outlet of the small powder package is detachably connected to the second ball valve 9. When the small powder package needs to be replaced, the second ball valve 9 is closed, removed from the old small powder package, sealed and installed on the new small powder package, and then opened again to prevent outside air from entering the second feeding pipe 7 during the replacement process. A third ball valve 10 is installed between the second feeding pipe 7 and the first ball valve 6. The third ball valve 10 is detachably connected to the first ball valve 6. When it is necessary to replace the small bag of powder with a powder ton for mixed feeding, firstly, the first ball valve 6 and the third ball valve 10 are closed. Then, the first ball valve 6 is removed from the third ball valve 10. Finally, the first ball valve 6 is sealed and connected to the new powder ton before being opened to prevent outside air from entering the first feeding pipe 1 or the second feeding pipe 7. The small bag of powder is suspended above the second feeding pipe 7 by a crane. A ground scale is installed at the bottom of the crane to weigh the small bag of powder, thereby accurately measuring the powder added to the reactor 5.

[0026] A baffle plate is installed at the connection between the nitrogen pipe 2 and the first feeding pipe 1. Multiple pores are distributed on the baffle plate, with the pore diameter smaller than the diameter of the powder. This allows nitrogen gas to flow from the nitrogen pipe 2 into the first feeding pipe 1, while preventing powder from entering the nitrogen pipe 2. A flow regulating valve 11 is installed on the nitrogen pipe 2 to adjust the nitrogen flow rate according to the metering of powder added to the reactor 5, thereby delivering different powders into the reactor.

[0027] like Figure 4As shown, a third feeding pipe 12 is provided inside the feed inlet 51 of the reactor 5. One end of the third feeding pipe 12 is sealed to the first feeding pipe 1 via a flange 4, and the other end extends vertically into the interior of the reactor 5 to reduce the amount of powder fed into the reactor 5 that is discharged from the gas outlet at the top of the reactor 5 along with the nitrogen gas, thus reducing powder loss. The end of the third feeding pipe 12 that extends into the reactor 5 has a bend 13 that bends horizontally, allowing the powder to be thrown horizontally into the middle of the reactor 5, improving the uniformity of powder feeding. A nozzle 14 is connected to the bend 13, and the diameter of the nozzle 14 gradually increases from the inside to the outside, thereby reducing the impact force of the nitrogen gas flow ejected from the nozzle 14, further reducing the amount of powder carried in the nitrogen gas discharged from the gas outlet at the top of the reactor 5.

[0028] The above description is merely an example and illustration of the structure of this utility model. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of this utility model.

Claims

1. A powder feeding device for a closed reaction vessel, characterized in that, include: The first feeding pipe (1) and the nitrogen pipe (2) are connected. One end of the first feeding pipe (1) is sealed to the powder material source through the first hose (3), and the other end is sealed to the feed port (51) of the reactor (5) through the flange (4). A first ball valve (6) is provided between the first hose (3) and the powder material source. One end of the nitrogen pipe (2) is sealed to the first feeding pipe (1), and the other end is sealed to the nitrogen source, so as to introduce nitrogen gas flow into the first feeding pipe (1) and transport the powder from the powder material source to the reactor (5).

2. The powder feeding device according to claim 1, characterized in that, The powder material source is a powder ton barrel. The outlet of the powder ton barrel is detachably connected to the first ball valve (6). A ground scale is installed at the bottom of the powder ton barrel.

3. The powder feeding device according to claim 1, characterized in that, The powder material source is small-package powder. A second feeding pipe (7) is provided between the small-package powder and the first ball valve (6). One end of the second feeding pipe (7) is sealed to the small-package powder through the second hose (8), and the other end is sealed to the first ball valve (6).

4. The powder feeding device according to claim 3, characterized in that, A second ball valve (9) is provided between the second hose (8) and the small bag of powder. The outlet of the small bag of powder is detachably connected to the second ball valve (9). A third ball valve (10) is provided between the second feeding pipe (7) and the first ball valve (6). The third ball valve (10) is detachably connected to the first ball valve (6).

5. The powder feeding device according to claim 3, characterized in that, Small packets of powder are suspended above the second feeding pipe (7) by a crane, and a ground scale is installed at the bottom of the crane.

6. The powder feeding device according to claim 1, characterized in that, The nitrogen pipe (2) is connected to the first feeding pipe (1) near the powder material source. A partition is provided at the connection between the nitrogen pipe (2) and the first feeding pipe (1). Multiple air holes are distributed on the partition, and the diameter of the air holes is smaller than the diameter of the powder.

7. The powder feeding device according to claim 1, characterized in that, A flow regulating valve (11) is installed on the nitrogen pipe (2).

8. The powder feeding device according to claim 1, characterized in that, The reactor (5) has a third feeding pipe (12) inside the feed inlet (51). One end of the third feeding pipe (12) is sealed to the first feeding pipe (1) through the flange (4), and the other end extends vertically into the interior of the reactor (5).

9. The powder feeding device according to claim 8, characterized in that, The third feeding pipe (12) has a bent pipe (13) that bends horizontally at one end into the reactor (5). A nozzle (14) is connected to the bent pipe (13), and the diameter of the nozzle (14) gradually increases from the inside to the outside.

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