Liquid-liquid on-line mixing device

Abstract

The utility model discloses a kind of liquid-liquid online mixing devices, including at least two liquid buffer tanks, static mixer and finished product tank, between each liquid buffer tank and static mixer, static mixer and finished product tank are all pipeline connection;Gear pump, flowmeter and first pneumatic three-way valve are sequentially equipped on the pipeline between liquid buffer tank and static mixer, and one outlet of the first pneumatic three-way valve is connected with the pipeline between liquid buffer tank;Still be equipped with the control device electrically coupled with the flowmeter and the first pneumatic three-way valve.Can improve the quality of mixed material.

Description

Technical Field

[0001] This utility model relates to the field of material mixing technology, and in particular to an online liquid-liquid mixing device. Background Technology

[0002] In industries such as chemical, pharmaceutical, and food processing, liquid-liquid mixing is a crucial process. Traditional liquid-liquid mixing methods primarily utilize stirred tank reactors, achieving mixing through mechanical stirring. While simple, this method suffers from drawbacks such as low mixing efficiency, high energy consumption, the potential for dead zones, and difficulty in achieving uniform mixing. These problems are particularly pronounced when processing high-viscosity, low-flow-rate, or multi-component liquids.

[0003] With the development of static mixers, they have been applied to liquid-liquid mixing processes. A static mixer is a highly efficient mixing device without moving parts. Through mixing units fixed within a pipeline, it causes the fluid to undergo division, shearing, and rotation during flow, thereby achieving mixing. Static mixers offer advantages such as high mixing efficiency, low energy consumption, no dead zones, and ease of control.

[0004] However, for some high-viscosity or low-flow-rate liquids, the mixing effect of static mixers decreases as the flow rate decreases, making it difficult to achieve ideal mixing uniformity, and the quality of the mixed material needs to be improved. Utility Model Content

[0005] The purpose of this invention is to provide an online liquid-liquid mixing device that can improve the quality of the mixed materials.

[0006] The technical solutions for achieving the above objectives include the following:

[0007] This utility model proposes an online liquid-liquid mixing device, including...

[0008] At least two liquid buffer tanks, a static mixer, and a finished product tank are provided, with each liquid buffer tank connected to the static mixer and the static mixer connected to the finished product tank via piping.

[0009] A gear pump, a flow meter, and a first pneumatic three-way valve are sequentially installed on the pipeline between the liquid buffer tank and the static mixer. One outlet of the first pneumatic three-way valve is connected to the pipeline between the liquid buffer tank.

[0010] It also includes a control device electrically connected to the flow meter and the first pneumatic three-way valve.

[0011] In one embodiment, a densitometer is installed on the pipeline between the static mixer and the finished product tank, and the densitometer is electrically connected to the control device.

[0012] In one embodiment, a second pneumatic three-way valve is provided on the pipeline between the static mixer and the finished product tank after the densitometer. One outlet of the second pneumatic three-way valve is connected to the waste liquid tank pipeline, and the second pneumatic three-way valve is electrically connected to the control device.

[0013] In one embodiment, a demagnetizer is provided on the pipeline between the second pneumatic three-way valve and the finished product tank.

[0014] In one embodiment, at least two finished product tanks are provided, and a three-way valve is connected after the demagnetizer, the three-way valve being connected to a pipeline of each finished product tank.

[0015] In one embodiment, the outlet pipe connected to the finished product tank is equipped with a discharge gear pump, a temperature transmitter, and a pressure transmitter that are electrically connected to the control device.

[0016] In one embodiment, a third pneumatic three-way valve electrically connected to the control device is also provided on the outlet pipe connected to the finished product tank. The third pneumatic three-way valve is located after the temperature transmitter and the pressure transmitter, and one of the outlets of the third pneumatic three-way valve is connected to the discharge gear pump pipe.

[0017] In one embodiment, both the liquid buffer tank and the finished product tank are equipped with a weighing component, a material level detection component, and a nitrogen sealing protection component.

[0018] In one embodiment, a temperature transmitter and a pressure transmitter are further provided between the gear pump and the flow meter.

[0019] In one embodiment, both the liquid buffer tank and the finished product tank are provided with a cleaning fluid inlet.

[0020] The technical solution provided by this utility model has the following advantages and effects:

[0021] By installing a gear pump, a flow meter, and a first pneumatic three-way valve on each liquid pipeline, the gear pump and flow meter monitor and provide feedback to each other, and the first pneumatic three-way valve can control the liquid flow direction. This ensures that the liquid flow rate from each pipeline into the static mixer reaches the target flow rate before the liquid enters the static mixer for mixing, thus ensuring the stability of the instantaneous flow rate of the liquid in the pipeline. This guarantees that various liquids are mixed online in proportion, improving the quality of the mixed material. Attached Figure Description

[0022] The accompanying drawings illustrate specific examples of the technical solutions described in this utility model, and together with the detailed embodiments, form part of the specification, serving to explain the technical solutions, principles, and effects of this utility model.

[0023] Unless otherwise specified or defined, the same reference numerals in different figures represent the same or similar technical features, and different reference numerals may be used to represent the same or similar technical features.

[0024] Figure 1 This is a schematic diagram of the structure of an embodiment of the online liquid-liquid mixing device of this utility model;

[0025] Figure 2 This is a schematic diagram of the process flow of an embodiment of the online liquid-liquid mixing device of this utility model.

[0026] Explanation of reference numerals in the attached figures:

[0027] 10. Liquid buffer tank; 11. Weighing assembly; 12. Material level detection assembly.

[0028] 20. Finished product cans

[0029] 30. Liquid inlet pipe; 31. Filter; 32. Pneumatic ball valve.

[0030] 40. Gas pipeline; 41. Manual ball valve; 42. Manual shut-off valve.

[0031] 50. Exhaust gas pipeline; 51. Pneumatic ball valve; 52. Check valve.

[0032] 60. Cleaning fluid pipeline; 61. Manual ball valve; 62. Pneumatic ball valve.

[0033] 70. Static mixer,

[0034] 80. Pre-mixing piping; 81. Gear pump; 82. Flow meter; 83. First pneumatic three-way valve.

[0035] 90. Mixed pipe; 91. Densitometer; 92. Sampling port; 93. Second pneumatic three-way valve; 94. Demagnetizer. Detailed Implementation

[0036] To facilitate understanding of this utility model, the specific embodiments of this utility model will be described in more detail below with reference to the accompanying drawings.

[0037] Unless otherwise specified or defined, the terms "first," "second," etc., used in this document are for distinguishing names only and do not represent a specific number or order.

[0038] Unless otherwise stated or defined, the term “and / or” as used herein includes any and all combinations of one or more of the associated listed items.

[0039] It should be noted that when a component is considered "fixed" to another component, it can be directly fixed to the other component or there can be an intervening component; when a component is considered "connected" to another component, it can be directly connected to the other component or there can be an intervening component; when a component is considered "mounted" on another component, it can be directly mounted on the other component or there can be an intervening component; when a component is considered "placed" on another component, it can be directly placed on the other component or there can be an intervening component.

[0040] This embodiment provides an online liquid-liquid mixing device that can achieve efficient, uniform, and energy-saving online liquid-liquid mixing, and has real-time monitoring feedback and safety interlock functions. It can monitor the quality of the mixed material through a combination of multiple methods.

[0041] Figure 1 The diagram shown is a structural schematic of this embodiment. (Reference) Figure 1 This embodiment of the online liquid-liquid mixing device mainly involves the processes of conveying, mixing, storing, and discharging two liquids. Specifically, it includes two liquid buffer tanks 10 and one finished product tank 20. Each liquid buffer tank 10 is provided with a liquid inlet, a protective gas inlet, a tail gas outlet, and a cleaning fluid inlet. The liquids flowing into the two liquid buffer tanks 10 through the liquid inlets are different, namely liquid A and liquid B. The liquid inlet of one liquid buffer tank 10 is connected to the liquid input pipe 30 of liquid A, and the liquid inlet of the other liquid buffer tank 10 is connected to the liquid input pipe 30 of liquid B. The other end of the liquid input pipe 30 is connected to a tonne tank, and the liquid in the tonne tank is pressurized and filtered by nitrogen before entering the liquid buffer tank 10. The protective gas inlet is connected to a gas pipe 40. The tail gas outlet is connected to a tail gas pipe 50, and the cleaning fluid inlet is connected to a cleaning fluid pipe 60. The protective gas in the gas pipe 40 can be an inert gas such as N2 or Ar, or compressed air; there can also be more than two liquid buffer tanks 10.

[0042] A filter 31 and a pneumatic ball valve 32 are installed on the liquid input pipeline 30. The filter 31 is used to filter impurities in the liquid within the liquid input pipeline 30, and the pneumatic ball valve 32 is used to control the flow of liquid within the liquid input pipeline 30. A manual ball valve 61 and a pneumatic ball valve 62 are installed on the cleaning fluid pipeline 60 to control the flow of cleaning fluid. A manual ball valve 41 and a manual shut-off valve 42 are installed on the gas pipeline 40 to control the flow of protective gas. A pneumatic ball valve 51 and a check valve 52 are installed on the exhaust gas pipeline 50 to control the one-way flow of exhaust gas from the liquid buffer tank 10 out of the exhaust gas pipeline 50.

[0043] Each liquid buffer tank 10 and finished product tank 20 is equipped with a weighing component 11, a level detection component 12, and a nitrogen sealing protection component. The weighing component 11 is used to weigh the liquid buffer tank 10 and finished product tank 20, the level detection component 12 is used to detect the liquid level in the liquid buffer tank 10 and finished product tank 20, and the nitrogen sealing protection component is used to provide nitrogen sealing protection for the liquid buffer tank 10 and finished product tank 20 to ensure the quality of the liquid stored therein.

[0044] A static mixer 70 is installed between the liquid buffer tank 10 and the finished product tank 20. Each liquid buffer tank 10 is connected to the static mixer 70, and the static mixer 70 is connected to the finished product tank 20 via pipelines. The static mixer 70 is used to mix the liquid delivered from each liquid buffer tank 10 and then deliver it to the finished product tank 20.

[0045] The pipeline between each liquid buffer tank 10 and the static mixer 70 is a pre-mixing pipeline 80. A gear pump 81, a flow meter 82, and a first pneumatic three-way valve 83 are sequentially installed on the pre-mixing pipeline 80. The gear pump 81 pumps liquid into the static mixer 70. The flow meter 82 is located between the gear pump 81 and the static mixer 70 to detect the liquid flow rate in the pre-mixing pipeline 80. The first pneumatic three-way valve 83 is located between the flow meter 82 and the static mixer 70. The first port of the first pneumatic three-way valve 83 is connected to the flow meter 82 pipeline, the second port is connected to the static mixer 70 pipeline, and the third port is connected to the liquid buffer tank 10 pipeline. The flow meter 82 and the first pneumatic three-way valve 83 are electrically connected to a control device. When the liquid flow rate detected by the flow meter 82 does not reach the target flow rate (this may occur because the device parameters have not been fully adjusted or there are instantaneous flow fluctuations), the control device connects the first and third ports of the first pneumatic three-way valve 83, allowing the liquid to flow back to the liquid buffer tank 10. When the flow meter 82 detects that the liquid flow rate in each pre-mixing pipe 80 has reached the target flow rate, the control device connects the first and second ports of the first pneumatic three-way valve 83, allowing the liquid to flow into the static mixer 70. Through mutual monitoring and feedback between the gear pump 81 and the flow meter 82, the liquid flow rate flowing into the static mixer 70 from each pipe reaches the target flow rate before entering the static mixer 70 for mixing, ensuring stable instantaneous flow rates within the pipes and thus guaranteeing the online mixing of liquid A and liquid B in proportion. It should be noted that the target flow rates for each pipe can be the same or different.

[0046] In some embodiments, a temperature transmitter and a pressure transmitter are also provided on the pipeline between the gear pump 81 and the flow meter 82. The temperature transmitter and the pressure transmitter detect the liquid temperature and the pipeline pressure respectively, which can collect parameters from multiple aspects to ensure equipment safety and precise control.

[0047] In some embodiments, a densitometer 91 and / or a sampling port 92 are provided on the mixing pipeline 90 between the static mixer 70 and the finished product tank 20. The densitometer 91 and the sampling port 92 are used to detect the mixed liquid after mixing in the static mixer 70. The densitometer 91 is used to detect the density of the mixed liquid, which characterizes the uniformity of material mixing. The quality of the mixed material is monitored by the densitometer 91, and the mixing process is monitored by the flow meter 82 to ensure the quality of the material after online mixing.

[0048] In addition to the densitometer 91, a second pneumatic three-way valve 93 can be installed on the mixing pipeline 90 between the static mixer 70 and the finished product tank 20. The second pneumatic three-way valve 93 is installed after the densitometer 91. Two ports of the second pneumatic three-way valve 93 are connected to the static mixer 70 and the finished product tank 20 respectively, and the other port is connected to the pipeline of the waste liquid tank (not shown in the figure). When the test result of the densitometer 91 determines that the mixed liquid does not meet the mixing requirements, the control device controls the second pneumatic three-way valve 93, causing the mixed liquid that does not meet the mixing requirements to flow into the waste liquid tank.

[0049] In this embodiment, a demagnetizer 94 is also provided on the pipeline between the second pneumatic three-way valve 93 and the finished product tank 20. The demagnetizer 94 is used to remove magnetic substances from the mixed liquid.

[0050] In some embodiments, there are two finished product tanks 20, each connected to a three-way valve (not shown) after the demagnetizer 94, with the three-way valve connected to the piping of each finished product tank 20.

[0051] To effectively transport the mixed liquid obtained from the finished product tank 20, a discharge gear pump, a temperature transmitter, and a pressure transmitter are installed on the outlet pipe connected to the finished product tank 20. The discharge gear pump is used to pump the mixed liquid out of the finished product tank, and the temperature transmitter and pressure transmitter are used to detect the temperature of the mixed liquid and the pipeline pressure, respectively. When the temperature and pressure do not meet the requirements, an alarm message is sent to the control device.

[0052] Furthermore, a third pneumatic three-way valve is installed on the outlet pipe connected to the finished product tank 20. The third pneumatic three-way valve is located after the temperature transmitter and pressure transmitter, and one of its outlets is connected to the discharge gear pump pipe. The third pneumatic three-way valve is electrically connected to the control device, which controls the third pneumatic three-way valve to discharge material or guide the mixed liquid to the discharge gear pump according to the material usage of the production line.

[0053] Figure 2 The diagram shown is a schematic representation of the process flow in this embodiment. (Reference) Figure 2The process in this embodiment is as follows: Liquid A is fed into the Liquid A ton container by nitrogen pressure and filtered, and then enters the Liquid A buffer tank V101. The buffer tank has weighing and level detection functions, is protected by nitrogen sealing, and is equipped with a cleaning fluid interface; Liquid B is fed into the Liquid B ton container by nitrogen pressure and filtered, and then enters the Liquid B buffer tank V102. The buffer tank has weighing and level detection functions, is protected by nitrogen sealing, and is equipped with a cleaning fluid interface.

[0054] Liquid A is delivered from buffer tank V101 via liquid A gear pump P101 in a low-pulse, zero-leakage manner. Temperature and pressure are monitored during delivery, and the fluid flow rate is then measured by mass flow meter FT0101. This flow rate is used as the basis for target flow control. Liquid A is returned to buffer tank V101 before parameter adjustment is complete. Liquid B is delivered from buffer tank V102 via liquid B gear pump P102 in a low-pulse, zero-leakage manner. Temperature and pressure are monitored during delivery, and the fluid flow rate is measured by flow meter FT0201. Liquid B is returned to buffer tank V102 before parameter adjustment is complete. Only when the flow rates of both liquid A and liquid B reach the target flow rate do the valves simultaneously switch, and the liquids enter the static mixer for mixing.

[0055] The mixture undergoes an online demagnetizer to remove magnetic substances, and the density of the mixed material is measured using a DT0301 densitometer to characterize the uniformity of the mixture. Material that passes the density test enters either finished product tank A or finished product tank B. Both finished product tanks are equipped with weighing, level detection, and nitrogen sealing protection, and also have a cleaning fluid interface.

[0056] The material in the finished product tank is discharged through discharge gear pump A or discharge gear pump B with low pulse and zero leakage. Before discharge, the material is tested for temperature and pressure and filtered. Depending on the material usage of the production line, the material can be discharged for production line use or circulated to the discharge gear pump. The discharge pipeline is also equipped with a sampling port for periodic sampling and analysis.

[0057] This embodiment enables online mixing of liquids A and B according to a preset ratio, with the mixing mass ratio fluctuating within ≤0.5% above and below the target ratio, and the mixing non-uniformity ≤0.5%. Furthermore, the material temperature is strictly monitored during the mixing process to prevent overheating during material conveying. The entire device passes the pressure holding test, and parameters such as equipment temperature, pressure, flow rate, and speed are automatically collected, recorded, and interlocked with alarms, enabling linkage between parameters and between devices to ensure equipment safety and precise control.

[0058] When referencing drawings, new features are explained. To avoid redundant references to drawings that would make the description less concise, features already described will not be referenced again on the drawings if the description is clear.

[0059] The purpose of the above embodiments is to reproduce and derive the technical solution of this utility model by way of example, and to fully describe the technical solution, purpose and effect of this utility model. The purpose is to enable the public to have a more thorough and comprehensive understanding of the disclosed content of this utility model, and it is not intended to limit the protection scope of this utility model.

[0060] The above embodiments are not an exhaustive list based on the present invention, and there may be other embodiments not listed. Any substitutions and improvements made without departing from the concept of the present invention are within the protection scope of the present invention.

Claims

1. A liquid-liquid on-line mixing device, characterized by include: At least two liquid buffer tanks, a static mixer, and a finished product tank are provided, with each liquid buffer tank connected to the static mixer and the static mixer connected to the finished product tank via piping. A gear pump, a flow meter, and a first pneumatic three-way valve are sequentially installed on the pipeline between the liquid buffer tank and the static mixer. One outlet of the first pneumatic three-way valve is connected to the pipeline between the liquid buffer tank. It also includes a control device electrically connected to the flow meter and the first pneumatic three-way valve.

2. The liquid-liquid inline mixing device of claim 1, wherein, A densitometer is installed on the pipeline between the static mixer and the finished product tank, and the densitometer is electrically connected to the control device.

3. The liquid-liquid in-line mixing device of claim 2, wherein, A second pneumatic three-way valve is installed on the pipeline between the static mixer and the finished product tank after the densitometer. One outlet of the second pneumatic three-way valve is connected to the waste liquid tank pipeline, and the second pneumatic three-way valve is electrically connected to the control device.

4. The liquid-liquid inline mixing device of claim 3, wherein, A demagnetizer is installed on the pipeline between the second pneumatic three-way valve and the finished product tank.

5. The liquid-liquid in-line mixing device of claim 4, wherein, At least two finished product tanks are provided, and a three-way valve is connected after the demagnetizer. The three-way valve is connected to the pipeline of each finished product tank.

6. The liquid-liquid inline mixing device of claim 1, wherein, The outlet pipe connected to the finished product tank is equipped with a discharge gear pump, a temperature transmitter, and a pressure transmitter that are electrically connected to the control device.

7. The liquid-liquid in-line mixing device of claim 6, wherein, A third pneumatic three-way valve, which is electrically connected to the control device, is also provided on the outlet pipe connected to the finished product tank. The third pneumatic three-way valve is located after the temperature transmitter and the pressure transmitter, and one of the outlets of the third pneumatic three-way valve is connected to the discharge gear pump pipe.

8. The liquid-liquid in-line mixing device of any one of claims 1-7, wherein, Both the liquid buffer tank and the finished product tank are equipped with a weighing component, a material level detection component, and a nitrogen sealing protection component.

9. The liquid-liquid in-line mixing device of any one of claims 1-7, wherein, A temperature transmitter and a pressure transmitter are also provided between the gear pump and the flow meter.

10. The liquid-liquid in-line mixing device of any one of claims 1-7, wherein, Both the liquid buffer tank and the finished product tank are equipped with cleaning fluid inlets.

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