Reaction system for maintaining stable liquid inlet flow

Abstract

The utility model discloses a kind of reaction systems that keep the stable flow of liquid, it includes reaction kettle, liquid inlet mechanism and circulating mechanism, liquid inlet mechanism is used to inject raw material into reaction kettle, circulating mechanism is used to circulate the raw material in liquid inlet mechanism, so as to push out the air in pipeline by raw material, realize the stable delivery of pipeline to raw material.

Description

Technical Field

[0001] This utility model relates to the field of chemical production equipment technology, and in particular to a reaction system that maintains a stable influent flow rate. Background Technology

[0002] In the chemical production field, in order to improve the accuracy of the amount of raw materials fed into the reactor, flow meters are installed on the pipeline from the raw material tank to the reactor to measure the raw materials flowing through the pipeline. However, in actual production, especially when raw materials are first introduced into the reactor through the pipeline, the presence of air in the pipeline causes the air to be carried along with the raw materials and measured by the flow meter, resulting in flow meter distortion. This makes it impossible to accurately control the amount of raw materials fed, affecting the reaction results and ultimately generating a large number of unqualified products. Therefore, there is an urgent need for a reaction system that can purge the air in the pipeline before the raw materials are delivered into the reactor. Utility Model Content

[0003] The purpose of this invention is to provide a reaction system that maintains a stable influent flow rate, so as to solve one or more technical problems existing in the prior art, or at least provide a beneficial option or create conditions.

[0004] The solution to the technical problem of this utility model is:

[0005] A reaction system that maintains a stable influent flow rate, comprising:

[0006] Reactor;

[0007] The liquid inlet mechanism includes a first storage tank and an inlet pipe. One end of the inlet pipe is connected to the bottom of the first storage tank and the other end is connected to the reaction vessel. A flow meter and a first valve are sequentially arranged on the inlet pipe along the direction from the first storage tank to the reaction vessel. A first pumping component is also provided on the inlet pipe.

[0008] The circulation mechanism includes a first return pipe and a second valve. One end of the first return pipe is connected to the feed pipe and is located between the flow meter and the first valve. The other end is connected to the first storage tank. The second valve is provided on the first return pipe.

[0009] This technical solution has at least the following beneficial effects: When raw materials are introduced into the reactor, the first valve is closed to completely seal the reactor and prevent the raw materials from flowing in. Sufficient raw materials are then introduced into the first storage tank. Next, the second valve and the first pump are opened. Under the action of the first pump, the raw materials are transported along the feed pipe to the flow meter. The flow meter detects the fluctuations and determines that the raw material flow is not stable enough. The raw materials then continue to flow back to the first storage tank along the first return pipe. This cycle repeats until the flow meter reading becomes constant. During this process, the raw materials... The material flows continuously through the feed pipe, pushing the air that was originally filling the feed pipe into the first storage tank. Due to its lower density, the air fills the top of the first storage tank, while the raw material enters the feed pipe from the bottom. After multiple cycles, when the flow count value becomes constant, meaning there is no air in the feed pipe, the second valve is closed and the first valve is opened. The raw material can then flow in the air-free pipe. The flow meter can accurately measure the flow rate of the raw material entering the reactor, allowing the experimenter to precisely control the quality of various reaction materials in the reactor.

[0010] As a further improvement to the above technical solution, it also includes a second storage tank, an overflow pipe, and a second return pipe. The first storage tank has an overflow port at the top. One end of the overflow pipe is connected to the overflow port and the other end is connected to the second storage tank. One end of the second return pipe is connected to the second storage tank and the other end is connected to the top of the first storage tank. The second return pipe is equipped with a second pumping component.

[0011] As a further improvement to the above technical solution, the height of the end of the second return pipe connected to the first storage tank is higher than the height of the overflow port.

[0012] As a further improvement to the above technical solution, the bottom of the second storage tank gradually slopes downwards along the direction from away from to near the second return pipe.

[0013] As a further improvement to the above technical solution, the end of the first return pipe away from the feed pipe is connected to the second storage tank and is also connected to the first storage tank through the second return pipe.

[0014] As a further improvement to the above technical solution, a level gauge is installed on the first storage tank.

[0015] As a further improvement to the above technical solution, the overflow port is located at a height lower than the maximum measuring height of the level gauge.

[0016] As a further improvement to the above technical solution, the feed pipe is provided with a main switch valve at the front end of the flow meter.

[0017] As a further improvement to the above technical solution, the first pumping component is a diaphragm pump.

[0018] As a further improvement to the above technical solution, the second pumping component is a centrifugal pump. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly explained below. Obviously, the described drawings are only a part of the embodiments of this utility model, and not all of them. Those skilled in the art can obtain other design schemes and drawings based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of the system for maintaining a stable influent flow rate according to this utility model. Detailed Implementation

[0021] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0022] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, 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.

[0023] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0024] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0025] In the production of ternary precursors for new energy power batteries, continuous coprecipitation is usually used. The characteristics of continuous coprecipitation are continuous feeding of raw materials, dynamic equilibrium in the reactor, and continuous output of products. However, in the continuous coprecipitation process, the metering of raw material feed flow rate is required to be accurate. Otherwise, the amount of feed cannot be accurately controlled, which will affect the reaction results and ultimately generate a large number of unqualified products.

[0026] In the actual production process of ternary precursors, raw materials such as molten metal are transported to the reactor through pipelines equipped with flow meters. The flow meters facilitate precise control of the amount of raw materials fed in. After the pipeline is assembled, there may be air that has not been discharged before the raw materials are transported. During the subsequent raw material transportation process, the raw materials may carry the residual air in the pipeline through the flow meters, which will cause the flow meter to distort the measurement. Therefore, a reaction system that maintains a stable flow rate of liquid inlet is needed to discharge the air in the pipeline so that the raw materials in the pipeline maintain a stable transport flow rate.

[0027] Reference Figure 1 This application provides a reaction system for maintaining a stable flow rate of liquid inlet, which includes a reaction vessel 1, a liquid inlet mechanism 2, and a circulation mechanism 3. The liquid inlet mechanism 2 is used to inject raw materials into the reaction vessel 1, and the circulation mechanism 3 is used to circulate the raw materials in the liquid inlet mechanism 2, thereby pushing out the air in the pipeline through the raw materials and realizing the stable delivery of raw materials through the pipeline.

[0028] Specifically, the liquid inlet mechanism 2 includes a first storage tank 21 and an inlet pipe 22. One end of the inlet pipe 22 is connected to the bottom side wall of the first storage tank, and the other end is connected to the top of the reactor 1. A flow meter 221 and a first valve 222 are sequentially arranged on the inlet pipe 22 along the transmission direction from the first storage tank 21 to the reactor 1. The first valve 222 can control the passage from the first storage tank 21 to the reactor 1. A first pumping component 223 is also provided on the inlet pipe 22. As can be seen from the above, during normal production, the first valve 222 is opened, and the liquid raw material in the first storage tank 21 is pumped into the reactor 1 through the inlet pipe 22 by the first pumping component 223. At the same time, the flow meter 221 measures the raw material passing through the inlet pipe 22 to obtain the amount of raw material added, which is convenient for the workers to make overall material allocation based on the raw material value.

[0029] The circulation mechanism 3 includes a first return pipe 31 and a second valve 32. One end of the first return pipe 31 is connected to the feed pipe 22 and the connected section is located between the flow meter 221 and the first valve 222. Specifically, the feed pipe 22 is divided into two sections at this point. The two sections of the feed pipe 22 are connected through two pipes of a three-way pipe. The first return pipe 31 is connected to the third pipe of the three-way pipe to achieve connection with the middle part of the feed pipe 22. The other end of the first return pipe 31 can be connected to the first storage tank 21. The second valve 32 is provided on the first return pipe 31.

[0030] As described above, when raw materials are introduced into reactor 1, the first valve 222 is closed first to completely seal reactor 1 and prevent the raw materials from flowing in. Sufficient raw materials are then introduced into the first storage tank 21. Next, the second valve 32 and the first pump 223 are opened. Under the action of the first pump 223, the raw materials are transported along the feed pipe 22 to the flow meter 221. The flow meter 221 detects the fluctuations in the flow rate, indicating insufficient stability of the raw material flow. Subsequently, the raw materials continue to flow back to the first storage tank 21 along the first return pipe 31. This process is repeated until the flow rate in the flow meter 221 becomes constant. During this process, the raw materials are fully charged. The material flows continuously in the feed pipe 22, pushing the air that originally filled the feed pipe 22 into the first storage tank 21. Due to its lower density, the air fills the top of the first storage tank 21, while the raw material enters the feed pipe 22 from the bottom of the first feed pipe. After multiple cycles, when the flow meter 221 reading is constant, that is, when there is no air in the feed pipe 22, the second valve 32 is closed and the first valve 222 is opened. The raw material can flow in the air-free pipe. The flow meter 221 can accurately measure the flow rate of the raw material entering the reactor 1, thereby allowing the experimenter to accurately control the quality of various reaction materials in the reactor 1.

[0031] In actual production, it is necessary to continuously replenish raw materials into the first storage tank 21. After the raw materials are transported into the first storage tank 21, the liquid flow in the first storage tank 21 will be impacted. In order to ensure that the raw materials flowing into the feed pipe 22 flow smoothly, it is necessary to stabilize the flow of raw materials in the first storage tank 21. Therefore, the system in this application also includes a second storage tank 4, an overflow pipe 5, and a second return pipe 6. An overflow port is provided at the top side wall of the first storage tank 21. One end of the overflow pipe 5 is connected to the overflow port and the other end is connected to the top of the second storage tank 4. One end of the second return pipe 6 is connected to the top side of the second storage tank 4 and the other end is connected to the top of the first storage tank 21. A second pumping component 61 is provided on the second return pipe 6.

[0032] Through the above scheme, an overflow port is set at a certain height in the first storage tank 21. The overflow port can keep the raw material in the first storage tank 21 within a certain capacity. The flow of the raw material in the first storage tank 21 will not change significantly due to external supplementation input or output to the reactor 1, thus keeping the liquid level in the first storage tank 21 stable. This allows the raw material output from the bottom of the first storage tank 21 to enter the reactor 1 in a stable state.

[0033] As a further implementation, since the liquid level at the overflow port is the maximum height of the liquid level in the first storage tank 21, refer to... Figure 1 The end of the second return pipe 6 connected to the first storage tank 21 is at a height higher than the overflow port. Engineers measured the specifications of each component within the system and experimentally set the overflow port height until the flow meter 221 on the feed pipe 22 maintained a constant reading after raw material was fed into the first storage tank 21. This reading was then taken as the overflow port height. As described above, the raw material flows out of the overflow port and into the second storage tank 4, temporarily storing the liquid above the overflow port level in the second storage tank 4. This reduces the overall liquid level instability at the first storage tank 21 caused by the increased liquid level. The overflow outlet is positioned at a sufficient height in the first storage tank 21, ensuring that whether the material is replenished or re-introduced from the second storage tank 4 into the first storage tank 21 via the second return pipe 6, the impact point of the material flow on the material surface is far from the contact point between the bottom of the first storage tank 21 and the inlet pipe 22. Even if the flow entering the first storage tank 21 impacts the original surface, the impact on the material flow at the inlet pipe 22 is greatly reduced, thereby reducing air bubbles at the inlet pipe 22, further reducing the metering impact on the flow meter 221, and improving the accuracy of the reaction.

[0034] To reduce the amount of residual raw materials in the second storage tank 4, refer to Figure 1 The bottom of the second storage tank 4 gradually slopes downwards from the direction away from to the direction close to the second return pipe 6. The inclined end of the second storage tank 4 is the connection point with the second return pipe 6. Through the above scheme, when the amount of raw material entering the second storage tank 4 is small, it can flow to the second return pipe 6 through the inclined bottom surface, reducing raw material residue and improving the utilization rate of raw materials in the whole system.

[0035] As a further implementation, the end of the first return pipe 31 away from the feed pipe 22 is connected to the top of the second storage tank 4 and can be connected to the first storage tank 21 through the second return pipe 6. The second valve 32 is located between the end of the first return pipe 31 connected to the feed pipe 22 and the second storage tank 4. By adopting the above scheme, the first return pipe 31, which was originally directly connected to the first storage tank 21, is set at the second storage tank 4. Firstly, it can reduce the liquid inlet source at the first storage tank 21. The raw materials are uniformly returned to the first storage tank 21 through the second return pipe 6, so that only supplementary feeding and feeding from the second storage tank 4 through the second return pipe 6 are allowed on the first storage tank 21. This further reduces the impact of the liquid flow at the first storage tank 21 on the internal liquid surface and further improves the stability of the liquid level in the first storage tank 21.

[0036] To facilitate engineers' understanding of liquid level changes in the first storage tank 21, a level gauge is installed on the first storage tank 21 in this embodiment. The height of the overflow port is lower than the height of the upper end of the level gauge. In this way, engineers can better observe the liquid level above the overflow port and adjust the flow rate of raw materials entering the first storage tank 21 from various components in the system to reduce changes in the liquid level in the first storage tank 21.

[0037] In this embodiment, in order to immediately stop the feeding of the first storage tank 21 into the reactor 1 in case of an emergency, a main switch valve 7 is provided between the feed pipe 22 at the front end of the flow meter 221 and the first storage tank 21. Furthermore, the main switch valve 7 can be a manual valve. The main switch valve 7 directly controls the flow of the feed pipe 22. In case of an emergency, the engineers can directly and manually close the feed pipe 22 to stop the reaction process, which is convenient for handling emergencies.

[0038] In this embodiment, the first pumping component 223 is a diaphragm pump. The first pumping component 223 is located between the first storage tank 21 and the main switch valve 7. Compared with other pumps, the diaphragm pump can pump the raw materials to the reactor 1 more stably at medium and low pressure, reducing the impact on the flow meter 221 when the raw materials are transported unstablely.

[0039] In this embodiment, the second pumping component 61 is a centrifugal pump, which is located between the second storage tank 4 and the first storage tank 21. As can be seen from the above, in order to quickly pump the raw material flowing to the second storage tank 4 through the overflow port back to the first storage tank 21, the engineers only need to increase the speed of the centrifugal pump to quickly replenish the raw material to the first storage tank 21. At the same time, relying on the special height setting of the overflow port, the impact on the original liquid level when the raw material enters the first storage tank 21 is reduced.

[0040] The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A reaction system that maintains a stable influent flow rate, characterized in that, include: Reactor (1); The liquid inlet mechanism (2) includes a first storage tank (21) and a feed pipe (22). One end of the feed pipe (22) is connected to the bottom of the first storage tank (21) and the other end is connected to the reactor (1). A flow meter (221) and a first valve (222) are sequentially arranged on the feed pipe (22) along the direction from the first storage tank (21) to the reactor (1). A first pumping component (223) is also provided on the feed pipe (22). The circulation mechanism (3) includes a first return pipe (31) and a second valve (32). One end of the first return pipe (31) is connected to the feed pipe (22) and is located between the flow meter (221) and the first valve (222). The other end is connected to the first storage tank (21). The second valve (32) is provided on the first return pipe (31).

2. The reaction system for maintaining a stable influent flow rate according to claim 1, characterized in that, It also includes a second storage tank (4), an overflow pipe (5), and a second return pipe (6). The first storage tank (21) has an overflow port at the top. One end of the overflow pipe (5) is connected to the overflow port and the other end is connected to the second storage tank (4). One end of the second return pipe (6) is connected to the second storage tank (4) and the other end is connected to the top of the first storage tank (21). The second return pipe (6) is equipped with a second pumping component (61).

3. The reaction system for maintaining a stable influent flow rate according to claim 2, characterized in that, The end of the second return pipe (6) connected to the first storage tank (21) is at a height higher than the overflow port.

4. The reaction system for maintaining a stable influent flow rate according to claim 2, characterized in that, The bottom of the second storage tank (4) gradually slopes downwards in the direction away from and closer to the second return pipe (6).

5. The reaction system for maintaining a stable influent flow rate according to claim 2, characterized in that, The end of the first return pipe (31) away from the feed pipe (22) is connected to the second storage tank (4) and is connected to the first storage tank (21) through the second return pipe (6).

6. The reaction system for maintaining a stable influent flow rate according to claim 5, characterized in that, The first storage tank (21) is equipped with a level gauge.

7. The reaction system for maintaining a stable influent flow rate according to claim 6, characterized in that, The overflow outlet is located at a height lower than the maximum measuring height of the level gauge.

8. The reaction system for maintaining a stable influent flow rate according to claim 1, characterized in that, The feed pipe (22) is equipped with a main switch valve (7) at the front end of the flow meter (221).

9. The reaction system for maintaining a stable influent flow rate according to claim 1, characterized in that, The first pumping component (223) is a diaphragm pump.

10. A reaction system for maintaining a stable influent flow rate according to claim 2, characterized in that, The second pumping component (61) is a centrifugal pump.

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