Efficient energy-saving acid supplementing device for acid gas-liquid mixing reaction in laboratory

Abstract

The utility model discloses an efficient energy-saving acid supplementing device for laboratory acid gas-liquid mixing reaction, which comprises a reaction tank, the top of the reaction tank is connected with a gas delivery pipe and an acid burette, the lower end of the gas delivery pipe extends into the reaction tank, and a stirring mechanism is arranged at the lower end of the gas delivery pipe. A knob of the acid burette is in transmission connection with the rotary steering engine, a pH meter is arranged in the reaction tank and is electrically connected with the display screen, and the rotary steering engine and the display screen are both electrically connected with the controller; according to the scheme, reaction liquid is uniformly stirred while reaction gas is introduced; reaction gas is uniformly distributed in reaction liquid, so that the mass transfer efficiency and the reaction efficiency are improved; meanwhile, an automatic pH regulation and control system is formed by the acid burette, the rotary steering engine, the pH meter and the controller, so that the pH can be automatically and continuously monitored and controlled; in addition, according to the scheme, gas kinetic energy can be recycled, and therefore the energy utilization efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of laboratory equipment, in particular to a high-efficiency energy-saving acid replenishing device for laboratory acidic gas-liquid mixed reaction. Background Art

[0002] In most inorganic chemistry experiments, gas-liquid mixed reactions involving acid are often involved; such reactions have strict requirements on the range of reaction pH; taking the experiment of leaching lithium ions from the positive electrode material of waste lithium iron phosphate batteries as an example, during the experimental reaction, as the hydrogen ions are consumed, the pH value of the reaction solution will continue to increase; at this time, the experimenter needs to introduce reaction gas into the reaction solution as an oxidant to ensure the continuous progress of the reaction, and needs to manually monitor the pH value of the solution and add acid to reduce the reaction pH to the specified range, and also needs to stir to speed up the reaction speed, and repeat the above operations until the reaction is completed; during this period, there are many steps that require manual operation, which are cumbersome and repetitive, greatly reducing work efficiency; when faced with a large number of experimental needs, not only will a large amount of human resources be consumed, but the quality of the experimental results is also extremely unstable, often resulting in half the result with twice the effort; in addition, when the experimenter manually monitors the pH, the pH meter will carry away some of the reaction substances, which will not only reduce the reaction efficiency, but also cause errors in the experimental data.

[0003] The existing utility model patent with announcement number CN220751971U discloses a pH automatic stirring monitoring device with a self-cleaning function. Although the device can replace manual stirring monitoring of the pH value of the reaction liquid, it is more suitable for pH monitoring in the solution after the reaction is completed. Its stirring method and monitoring accuracy are still limited by the design of the mechanical structure. For the pH monitoring of the solution system in the reaction, it cannot achieve the expected effect, thereby affecting the accuracy and reliability of the monitoring results.

[0004] The existing utility model patent with announcement number CN220913076U discloses an automatic titration pH meter device that is convenient for calculating the amount of solution, which uses motor rotation to control the titration speed. However, the motor speed is usually 1000-5000r / min; therefore, using motor rotation to control the titration speed actually has a large error, which will seriously affect the calculation results and the accuracy of the titration.

[0005] In addition, existing laboratory reaction devices do not achieve a high material and energy utilization efficiency. Taking the experiment of extracting lithium ions from the positive electrode material of waste lithium iron phosphate batteries as an example, in traditional experimental devices, the unreacted reaction gas is usually discharged directly into the air, and is not recycled, resulting in the problem of material waste. During the experiment, heating is usually used to speed up the reaction rate, which involves a large amount of thermal energy. In the process of the reaction gas flow, a large amount of kinetic energy is also involved. This part of the energy is usually directly dissipated into the environment, resulting in low energy utilization efficiency. Utility Model Content

[0006] In view of the above-mentioned deficiencies in the prior art, the utility model provides a high-efficiency and energy-saving acid replenishing device for laboratory acidic gas-liquid mixed reaction, which solves the problems of low reaction efficiency and poor pH control effect of the existing reaction device.

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0008] Provided is a high-efficiency and energy-saving acid replenishing device for laboratory acidic gas-liquid mixed reaction, comprising a reaction tank, the top of the reaction tank being connected with a gas delivery pipe and an acid burette, the lower end of the gas delivery pipe extending into the reaction tank, and a stirring mechanism being arranged at the lower end of the gas delivery pipe, a knob of the acid burette being transmission-connected to a rotary servo, a pH meter being arranged in the reaction tank, the pH meter being electrically connected to a display screen, and both the rotary servo and the display screen being electrically connected to a controller.

[0009] Furthermore, the stirring mechanism includes a stirring shaft, which is freely rotatably arranged at the lower end of the gas delivery pipe, and is provided with a plurality of stirring blades. An air channel connected to the gas delivery pipe is opened in the stirring shaft, and a plurality of air holes connected to the air channel are provided on the stirring blades.

[0010] Furthermore, a plurality of stirring blades are rotationally symmetrically arranged around the stirring shaft, the stirring blades are in the shape of arc plates, a plurality of air holes are evenly arranged on the inner arc surface of the stirring blades, and a plurality of air holes are connected to the airway through the connecting channel inside the stirring blades.

[0011] Furthermore, the upper end of the stirring shaft is movably connected to the lower end of the gas delivery pipe through a rotating gas nozzle.

[0012] Furthermore, the top of the reaction tank is connected to one end of the gas circulation pipe, and the other end of the gas circulation pipe is connected to the middle of the gas delivery pipe.

[0013] Furthermore, a wind fan blade is provided at the connection point between the gas delivery pipe and the gas circulation pipe, and the wind fan blade is drivingly connected to an external power generation device.

[0014] Furthermore, a valve-type one-way valve is provided at one end of the gas circulation pipe close to the gas delivery pipe.

[0015] The beneficial effects of the utility model are:

[0016] 1. In this scheme, when the pressurized reaction gas is conveyed to the reaction tank through the gas conveying pipe, the gas passes through the gas channel and the connecting channel in sequence and then is ejected from the air hole, and the stirring blade is driven to rotate, so that the reaction liquid is uniformly stirred while the reaction gas is introduced; and the reaction gas is dispersed into tiny bubbles under the action of stirring and is evenly distributed in the reaction liquid, so that this scheme not only enhances the stirring effect, but also effectively improves the mass transfer efficiency in the reaction process, thereby improving the reaction efficiency.

[0017] 2. This scheme uses an acid burette, a rotary servo, a pH meter and a controller to form an automatic pH control system. The pH value of the solution is monitored in real time by the pH meter. The rotary servo automatically adjusts the knob of the acid burette according to a preset range and adds an appropriate amount of acid solution to ensure that the reaction is carried out under ideal acidic or neutral conditions, thereby improving the stability and reliability of the experiment; at the same time, it avoids manual monitoring and control of pH.

[0018] 3. This solution can reuse the gas in the reaction tank that has not completely participated in the reaction through the gas circulation pipe. At the same time, the gas in the gas transmission pipe and the gas circulation pipe can drive the wind fan blades to rotate, thereby generating electrical energy, which can provide electrical energy for the controller, display screen and rotary servo, thereby realizing the reuse of gas kinetic energy and improving energy utilization efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of an efficient and energy-saving acid-supplementing device for laboratory acidic gas-liquid mixed reactions.

[0020] Figure 2 It is a structural diagram of the stirring mechanism.

[0021] Among them, 1. test bench, 2. reaction tank, 3. gas delivery pipe, 4. acid burette, 5. rotary servo, 6. pH meter, 7. display screen, 8. controller, 9. stirring shaft, 10. stirring blade, 11. air hole, 12. rotary air nozzle, 13. gas circulation pipe, 14. wind fan blade, 15. power generation device, 16. valve-type one-way valve. DETAILED DESCRIPTION

[0022] The specific implementation methods of the utility model are described below to facilitate technical personnel in this technical field to understand the utility model, but it should be clear that the utility model is not limited to the scope of the specific implementation methods. For ordinary technical personnel in this technical field, as long as various changes are within the spirit and scope of the utility model defined and determined by the attached claims, these changes are obvious, and all utility model creations using the concept of the utility model are protected.

[0023] like Figure 1 and Figure 2 As shown, the high-efficiency and energy-saving acid replenishing device for laboratory acidic gas-liquid mixed reaction of the present scheme includes a test bench 1, a reaction tank 2 is arranged on the test bench 1, the top of the reaction tank 2 is connected to a gas delivery pipe 3 and an acid burette 4, the lower end of the gas delivery pipe 3 extends into the reaction tank 2, and a stirring mechanism is arranged at the lower end of the gas delivery pipe 3, the knob of the acid burette 4 is transmission-connected to a rotary servo 5, a pH meter 6 is arranged in the reaction tank 2, the pH meter 6 is electrically connected to a display screen 7, and the rotary servo 5 and the display screen 7 are both electrically connected to a controller 8.

[0024] In specific implementation, the rotary servo 5 of this scheme can select MG90S servo, and the controller 8 can select stm32 single chip microcomputer. The pH value of the reaction solution is monitored in real time by the pH meter 6, and the measured data is transmitted to the controller 8 for processing; when the pH value of the solution is kept within the set threshold range, the continuous monitoring state can be maintained without any operation; and when the pH value of the solution exceeds the preset upper threshold value, the controller 8 will immediately send an instruction to the servo, and after receiving the instruction, the servo will automatically rotate the knob of the acid burette 4 to open the acid burette 4 and replenish an appropriate amount of acid solution; with the addition of acid solution, the pH value of the solution will gradually decrease, so that the pH value falls back to the set threshold range, and then the controller 8 will send an instruction to the servo again to close the acid burette 4; the whole process realizes the automatic and continuous monitoring and control of the pH value of the reaction solution; it replaces the problem of manual monitoring and regulation of pH, which is cumbersome, time-consuming and labor-intensive.

[0025] The stirring mechanism of the present scheme includes a stirring shaft 9, the upper end of the stirring shaft 9 is movably connected to the lower end of the gas delivery pipe 3 through a rotating gas nozzle 12, so that the stirring shaft 9 can be freely rotatably arranged at the lower end of the gas delivery pipe 3; an air channel connected to the gas delivery pipe 3 is opened in the stirring shaft 9, and two stirring blades 10 are arranged on the stirring shaft 9 in a rotationally symmetrical manner around the stirring shaft 9. The stirring blade 10 is in the shape of an arc plate, and a plurality of air holes 11 are evenly arranged on the inner arc surface of the stirring blade 10, and the plurality of air holes 11 are connected to the air channel through a connecting channel inside the stirring blade 10.

[0026] When the present solution delivers pressurized reaction gas to the reaction tank 2 through the gas delivery pipe 3, the gas passes through the gas channel and the connecting channel in sequence and then is ejected from the air hole 11, and drives the stirring blade 10 to rotate, so that while the reaction gas is introduced, the reaction liquid is uniformly stirred; and the reaction gas is dispersed into tiny bubbles under the action of stirring and is evenly distributed in the reaction liquid, so that the present solution not only enhances the stirring effect, but also effectively improves the mass transfer efficiency during the reaction process, thereby improving the reaction efficiency.

[0027] In this scheme, the top of the reaction tank 2 is connected to one end of the gas circulation pipe 13, and the other end of the gas circulation pipe 13 is connected to the middle of the gas delivery pipe 3, and a valve-type one-way valve 16 is provided at one end of the gas circulation pipe 13 close to the gas delivery pipe 3 to control the flow direction of the gas and prevent the gas delivered by the gas delivery pipe 3 from entering the reaction tank 2 through the gas circulation pipe 13; a wind fan blade 14 is provided at the connection between the gas delivery pipe 3 and the gas circulation pipe 13, and the wind fan blade 14 is transmission-connected to an external power generation device 15; the gas circulation pipe 13 can reuse the gas that has not completely participated in the reaction in the reaction tank 2, and at the same time, the gas in the gas delivery pipe 3 and the gas circulation pipe 13 can drive the wind fan blade 14 to rotate, thereby generating electrical energy, which can provide electrical energy for the controller 8, the display screen 7 and the rotary steering gear 5, thereby realizing the reuse of the kinetic energy of the reaction gas, thereby improving the energy utilization efficiency.

Claims

1. A highly efficient and energy-saving acid replenishing device for laboratory acidic gas-liquid mixed reaction, characterized in that: The invention comprises a reaction tank, the top of which is connected with a gas delivery pipe and an acid burette, the lower end of the gas delivery pipe extends into the reaction tank, and a stirring mechanism is arranged at the lower end of the gas delivery pipe, the knob of the acid burette is transmission-connected with a rotary servo, a pH meter is arranged in the reaction tank, the pH meter is electrically connected with a display screen, and the rotary servo and the display screen are both electrically connected with a controller.

2. The high-efficiency and energy-saving acid supplementation device for laboratory acidic gas-liquid mixed reaction according to claim 1 is characterized in that: The stirring mechanism includes a stirring shaft, which is freely rotatably arranged at the lower end of the gas delivery pipe, and is provided with a plurality of stirring blades. An air channel connected to the gas delivery pipe is opened in the stirring shaft, and a plurality of air holes connected to the air channel are arranged on the stirring blades.

3. The high-efficiency and energy-saving acid replenishing device for laboratory acidic gas-liquid mixed reaction according to claim 2 is characterized in that: The plurality of stirring blades are rotationally symmetrically arranged around the stirring shaft, the stirring blades are in the shape of arc plates, the plurality of air holes are evenly arranged on the inner arc surface of the stirring blades, and the plurality of air holes are connected to the airway through the connecting channel inside the stirring blades.

4. The high-efficiency and energy-saving acid replenishing device for laboratory acidic gas-liquid mixed reaction according to claim 2, characterized in that: The upper end of the stirring shaft is movably connected to the lower end of the gas delivery pipe through a rotating gas nozzle.

5. The high-efficiency and energy-saving acid replenishing device for laboratory acidic gas-liquid mixed reaction according to claim 1, characterized in that: The top of the reaction tank is connected to one end of a gas circulation pipe, and the other end of the gas circulation pipe is communicated with the middle of a gas delivery pipe.

6. The high-efficiency and energy-saving acid replenishing device for laboratory acidic gas-liquid mixed reaction according to claim 5, characterized in that: A wind fan blade is provided at the connection point between the gas delivery pipe and the gas circulation pipe, and the wind fan blade is drivingly connected to an external power generation device.

7. The high-efficiency and energy-saving acid replenishing device for laboratory acidic gas-liquid mixed reaction according to claim 5, characterized in that: A valve-type one-way valve is arranged at one end of the gas circulation pipe close to the gas delivery pipe.

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