A high-precision control mixing reaction device

Abstract

This utility model relates to a high-precision control mixing reaction device, including a mixing tank connected to a feed pipe assembly. The feed pipe assembly is equipped with a flow control valve. It also includes a weight monitoring element and a level monitoring element. The weight monitoring element is connected to the mixing tank and monitors the weight of the mixing tank. The level monitoring element is located inside the mixing tank and monitors the liquid level. Both the weight monitoring element and the level monitoring element are electrically connected to the flow control valve through a control unit. The control unit receives signals from the weight monitoring element and the level monitoring element and controls the flow control valve to operate. This utility model is rationally designed, using the weight monitoring element and the level monitoring element in conjunction with the flow control valve to achieve precise control of the raw material input.

Description

Technical Field

[0001] This utility model relates to a high-precision control mixing reaction device. Background Technology

[0002] In existing technologies, ammonium fluoride is often prepared by slowly adding ammonia to hydrofluoric acid. However, during the preparation process, the materials are directly added to the reaction vessel, and the ammonia and hydrofluoric acid enter the reaction vessel in a stream. Not only is it impossible to control the feeding rate, but the addition of the ammonia stream to the hydrofluoric acid can also cause the solution to splash and react violently, thus posing a safety hazard.

[0003] Currently, anhydrous hydrofluoric acid and liquid ammonia are added to the feeding device for neutralization during ammonium fluoride production. However, a large amount of anhydrous hydrofluoric acid and liquid ammonia are directly poured into the reaction tank, resulting in an excessively fast feeding rate and low raw material reaction efficiency during the feeding process. Utility Model Content

[0004] This invention addresses the problems existing in the prior art by providing a high-precision control mixing reaction device.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a high-precision controlled mixing reaction device, including a mixing tank connected to a feed pipe assembly, the feed pipe assembly being equipped with a flow control valve, and further including a weight monitoring element and a liquid level monitoring element. The weight monitoring element is connected to the mixing tank and monitors the weight of the mixing tank; the liquid level monitoring element is installed inside the mixing tank and monitors the liquid level of the mixing tank. Both the weight monitoring element and the liquid level monitoring element are electrically connected to the flow control valve through a control unit. The control unit receives signals from the weight monitoring element and the liquid level monitoring element and controls the flow control valve to operate.

[0006] Furthermore, the feed pipe assembly includes at least one main feed pipe, and each main feed pipe is connected to the mixing tank through two parallel feed branch pipes. One feed branch pipe is equipped with a high flow control valve, and the other feed branch pipe is equipped with a low flow control valve.

[0007] Furthermore, the weight monitoring component is a weight sensor.

[0008] Furthermore, the weight sensor is connected to an annular plate fixed to the outer surface of the mixing tank.

[0009] Furthermore, the liquid level monitoring device is a liquid level transmitter.

[0010] Furthermore, a circulation return pipe is connected between the bottom outlet and the top inlet of the mixing tank, and a circulation pump is installed on the circulation return pipe.

[0011] Furthermore, the circulating pump is electrically connected to the control unit.

[0012] Furthermore, a discharge pipe is installed on the circulation return pipe, and the discharge pipe is located on the output side of the circulation pump.

[0013] Furthermore, it also includes a human-machine control terminal, which is connected to the control unit.

[0014] Furthermore, when the control unit receives a signal from either the weight monitoring device or the liquid level monitoring device that reaches a set maximum threshold, the control unit controls the flow control valve to close.

[0015] Compared with the prior art, the present invention has the following advantages: The present invention is reasonably designed, and by setting up a weight monitoring device and a liquid level monitoring device, the two monitoring devices are combined with a flow control valve to accurately control the input of raw materials. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0017] Figure 2 This is a control principle diagram of an embodiment of the present invention.

[0018] In the picture:

[0019] 1-Mixing tank; 2-Feeding tank assembly; 3-Weight sensor; 4-Main feed pipe; 5-Feeding branch pipe; 6-High flow control valve; 7-Low flow control valve; 8-Annular plate; 9-Circulation return pipe; 10-Circulation pump; 11-Discharge pipe. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0021] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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.

[0022] like Figures 1-2As shown, this utility model discloses a high-precision controlled mixing reaction device, including a mixing tank 1 with a feed pipe assembly 2 connected to its upper end. Feed is introduced into the mixing tank through the feed pipe assembly. A flow control valve is installed on the feed pipe assembly 1 to control the feed flow rate. The device also includes a weight monitoring component and a liquid level monitoring component. The weight monitoring component is connected to the mixing tank 1 and monitors the weight of the mixing tank 1. The liquid level monitoring component is installed inside the mixing tank 1 and monitors the liquid level of the mixing tank 1. Both the weight monitoring component and the liquid level monitoring component are electrically connected to the flow control valve through a control unit. The control unit receives signals from the weight monitoring component and the liquid level monitoring component and controls the flow control valve to operate.

[0023] In this embodiment, the feed pipe assembly includes two main feed pipes 4, one for conveying anhydrous hydrofluoric acid and the other for conveying liquid ammonia. Each main feed pipe 4 is connected to the mixing tank via two parallel feed branch pipes 5, meaning the mixing tank 1 is connected to a total of four feed branch pipes 5. Of the two feed branch pipes 5 connected to each main feed pipe 4, one is equipped with a high-flow control valve 6, and the other with a low-flow control valve 7. During operation, the high-flow control valve is first opened for rapid, high-flow feeding, saving feeding time. When the material reaches 90% of the preset value, the high-flow control valve closes, and the low-flow control valve opens to complete the remaining 10% feeding.

[0024] In this embodiment, the feeding method can also simultaneously open the large and small flow control valves to perform large-flow rapid feeding. When the material is fed to 90% of the preset value, the large flow control valve closes and the small flow control valve continues to open, with the small flow control valve completing the remaining 10% feeding work.

[0025] In this embodiment, the weight monitoring component is a weight sensor 3, which is connected to an annular plate 8 fixed to the outer surface of the mixing tank 1. The weight sensor monitors the weight of the entire mixing tank. It should be noted that this weight sensor is a mature existing technology, and commercially available sensor models such as the HT-FW-reactor weighing sensor and the HM-8-402-1t alloy steel weighing sensor can generally be used. Their specific structure, working principle, and connection method will not be described in detail here.

[0026] In this embodiment, the liquid level monitoring device is a liquid level transmitter located on the inner side wall of the mixing tank 1 to monitor the liquid level. It should be noted that the liquid level transmitter is a mature existing technology, such as the UHZ519TF or CYW571A corrosion-resistant liquid level transmitter. Its specific structure, working principle and connection method will not be described in detail here.

[0027] In this embodiment, a circulation return pipe 9 is connected between the bottom outlet and the top inlet of the mixing tank 1. A circulation pump 10 is installed on the circulation return pipe 9. The circulation pump is used to extract the material from the mixing tank and circulate it back into the mixing tank to form a circulation.

[0028] In this embodiment, the circulating pump 10 is electrically connected to the control unit. The control unit may be, for example, a PLC module, a DCS controller, or an embedded controller.

[0029] In this embodiment, a discharge pipe 11 is installed on the circulation return pipe 9, and the discharge pipe 11 is located on the output side of the circulation pump 10. After the reaction is completed, the mixture is output to the discharge pipe through the circulation pump. During the output process, when the liquid level reaches the minimum threshold of the liquid level transmitter, the control unit controls the circulation pump to stop working, which can prevent the circulation pump from running dry.

[0030] This embodiment also includes a human-machine interface (HMI) terminal, which is connected to the control unit. Production personnel use the HMI terminal to set data for material feeding ratios and volumes.

[0031] In this embodiment, when the control unit receives a signal from either the weight monitoring device or the liquid level monitoring device that reaches a set maximum threshold, the control unit controls the flow control valve to close.

[0032] In this embodiment, the feed tube assembly is made of PFA flexible tubing.

[0033] Control Process: The control unit is electrically connected to the circulating pump, human-machine interface terminal (HMI), level transmitter, weight sensor, high-flow control valve, and low-flow control valve. During operation: Production personnel set the material feeding ratio and capacity via the HMI. The control unit sends the set data signal to the high-flow control valve 6 for rapid, high-flow feeding, saving feeding time. The weight sensor 4 and level transmitter provide real-time feedback of feeding data to the control unit. When the material reaches 90% of the preset value, the control unit closes the high-flow control valve 6 and opens the low-flow control valve 7, which completes the remaining 10% feeding. When any signal detected by the weight sensor or level transmitter reaches the set maximum threshold, the control unit sends a signal to close all flow control valves. After the reaction is complete, the mixture is output to the discharge pipe 11 via the circulating pump 10. During the output process, when the liquid level reaches the minimum threshold set by the level transmitter, the circulating pump 10 stops working to prevent it from running dry. The device can then begin a new round of mixing and reaction.

[0034] The advantages of this invention are: by setting up two monitoring methods, namely weight monitoring device and liquid level monitoring device, and combining large and small flow control valves, the raw material input can be precisely controlled; when the mixed liquid is intermittently discharged, the operation of the circulation pump is controlled by the liquid level monitoring device to avoid the circulation pump from running dry.

[0035] If this utility model discloses or relates to mutually fixedly connected parts or structural components, then, unless otherwise stated, a fixed connection can be understood as: a detachable fixed connection (e.g., using bolts or screws), or a non-detachable fixed connection (e.g., riveting, welding). Of course, mutually fixed connections can also be replaced by an integral structure (e.g., manufactured using a casting process) (except where it is obviously impossible to use an integral forming process).

[0036] In addition, unless otherwise stated, the terms used to indicate positional relationships or shapes in any of the technical solutions disclosed in this utility model above include states or shapes that are similar to, close to, or approximate with them.

[0037] Any component provided by this utility model can be assembled from multiple individual components, or it can be a single component manufactured by a one-piece molding process.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.

Claims

1. A high-precision controlled mixing reaction device, comprising a mixing tank connected to a feed pipe assembly, wherein the feed pipe assembly is equipped with a flow control valve, characterized in that: It also includes a weight monitoring device and a liquid level monitoring device. The weight monitoring device is connected to the mixing tank and monitors the weight of the mixing tank. The liquid level monitoring device is installed in the mixing tank and monitors the liquid level of the mixing tank. Both the weight monitoring device and the liquid level monitoring device are electrically connected to the flow control valve through the control unit. The control unit receives the signals from the weight monitoring device and the liquid level monitoring device and controls the flow control valve to work.

2. The high-precision control mixed reaction device according to claim 1, characterized in that: The feed pipe assembly includes at least one main feed pipe, and each main feed pipe is connected to the mixing tank through two parallel feed branch pipes. One feed branch pipe is equipped with a high flow control valve, and the other feed branch pipe is equipped with a low flow control valve.

3. The high-precision control hybrid reaction device according to claim 1, characterized in that: The weight monitoring device is a weight sensor.

4. The high-precision control hybrid reaction device according to claim 3, characterized in that: The weight sensor is connected to an annular plate fixed to the outer surface of the mixing tank.

5. The high-precision control hybrid reaction device according to claim 1, wherein: The liquid level monitoring device is a liquid level transmitter.

6. The high-precision control hybrid reaction device according to claim 1, characterized in that: A circulation return pipe is connected between the bottom outlet and the top inlet of the mixing tank, and a circulation pump is installed on the circulation return pipe.

7. The high-precision controlled mixing reaction device according to claim 6, characterized in that: The circulating pump is electrically connected to the control unit.

8. The high-precision control hybrid reaction device according to claim 6, characterized in that: The circulation return pipe is equipped with a discharge pipe, which is located on the output side of the circulation pump.

9. The high-precision control hybrid reaction device according to claim 1, characterized in that: It also includes a human-machine interface control terminal, which is connected to the control unit.

10. The high-precision control hybrid reaction device according to claim 1, characterized in that: When the control unit receives a signal from either the weight monitoring device or the liquid level monitoring device that reaches a set maximum threshold, the control unit controls the flow control valve to close.

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