Evaporator solution density measuring device and system
By setting up a circulation branch, a gas-liquid separator, and a density measuring tank outside the evaporator, the problems of short pipe blockage and measurement errors were solved, enabling accurate measurement of the evaporator solution density and optimizing the production process.
Patent Information
- Application Number
- CN202520286408.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-21
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2035-02-21
AI Technical Summary
In existing evaporator solution density measuring devices, the short tube is prone to clogging, resulting in large measurement errors and affecting the production process.
A circulation branch is set up outside the evaporator, including a gas-liquid separation tank and a density measuring tank. The solution flow is maintained by a circulation pump and a heating device, and the solution density is measured by a densitometer to avoid solution sedimentation and pipeline blockage.
This improves the accuracy of solution density measurement, avoids solution sedimentation and pipeline blockage, ensures that the measured value truly reflects the solution density inside the evaporator, and optimizes the production process.
Smart Images
Figure CN223597453U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to evaporator technical field, concretely relates to an evaporator solution density measuring device and system. BACKGROUND
[0002] In the nickel cobalt manganese potassium positive electrode material, cobalt element can promote electronic conductivity. Cobalt sulfate is a key raw material, and its evaporation crystallization process affects product quality. In the production process, the solution density in the evaporator is a key control parameter, which affects the crystal particle size.
[0003] The existing measurement of the density of cobalt sulfate solution in the evaporator is through a differential pressure conversion method. The cobalt sulfate evaporator solution pressure P01 is the lower pressure transmitter measurement value, and P02 is the upper solution pressure measurement value of the cobalt sulfate evaporator. ΔP = P02 - P01 = ρgh, ρ represents the density of the cobalt sulfate solution, and h represents the height difference of the pressure measurement points P02 and P01 sampling positions. According to the formula ρ = ΔP / gh, the solution density is obtained. Since the pressure sampling short pipe can deposit cobalt sulfate solution, the short pipe can be blocked, and the pressure measurement value is not true, the difference between the cobalt sulfate solution measurement value and the actual value is often large, which affects the normal production of the subsequent process.
[0004] In summary, the existing evaporator density measurement process has the technical problems of short pipe easy to block and large measurement error. UTILITY MODEL CONTENTS
[0005] The purpose of the present application is to overcome the above technical deficiencies, and to provide an evaporator solution density measuring device and system, which solves the technical problems of short pipe easy to block and large measurement error in the prior art.
[0006] To achieve the above technical purpose, the following technical solutions are adopted in the present application:
[0007] In a first aspect, the present application provides an evaporator solution density measuring device, which comprises a circulation branch, a gas-liquid separation tank, a density measuring tank and a densimeter:
[0008] The circulation branch, the inlet and outlet of the circulation branch are communicated with the evaporator respectively;
[0009] The gas-liquid separation tank and the density measuring tank are sequentially arranged on the circulation branch along the solution flow direction;
[0010] The densimeter is communicated with the density measuring tank.
[0011] In some embodiments of the present application, the gas outlet and liquid outlet of the gas-liquid separation tank are communicated with the density measuring tank respectively.
[0012] In some embodiments of the present application, a separation tank inlet valve is further included, which is arranged between the gas-liquid separation tank and the circulation branch inlet.
[0013] In some embodiments of the present application, a vent valve is further included, which is arranged between the gas outlet of the gas-liquid separation tank and the density measurement tank, and a protective cap is arranged above the density measurement tank with a gap between the protective cap and the density measurement tank, so that the density measurement tank is in communication with the external atmosphere through the gap.
[0014] In some embodiments of the present application, the diameter of the protective cap is greater than the diameter of the density measurement tank.
[0015] In some embodiments of the present application, a water inlet valve is further included, which is arranged at the liquid outlet of the gas-liquid separation tank.
[0016] In some embodiments of the present application, a control valve is further included, and the two ends of the density measurement tank are respectively in communication with the outlet of the circulation branch, and the control valve is arranged between one end of the density measurement tank and the outlet of the circulation branch.
[0017] In the second aspect, the present application further provides an evaporator solution density measurement system, which comprises an evaporator, a circulation main, and the evaporator solution density measurement device according to any one of the embodiments of the first aspect, the inlet and outlet of the circulation main are respectively in communication with the evaporator, and the inlet and outlet of the circulation branch are sequentially in communication with the circulation main along the solution flow direction.
[0018] In some embodiments of the present application, a circulation pump and a heating device are further included, the circulation pump is installed in the circulation main to make the solution flow in one direction, and the heating device is installed in the circulation branch and located on the side of the outlet of the circulation pump towards the circulation main.
[0019] In some embodiments of the present application, the evaporator, the gas-liquid separation tank, and the density measurement tank are arranged in parallel, a highest liquid level line is arranged in the evaporator, and the height of the highest liquid level line is less than the height of the protective cap.
[0020] Compared with the prior art, the technical scheme provided by the present application has the beneficial technical effects including:
[0021] In the present application, a circulation branch is arranged outside the evaporator through the gas-liquid separation tank and the density measurement tank, and the solution is in a flowing state when flowing through the gas-liquid separation tank and the density measurement tank, which is basically consistent with the solution state in the evaporator, thereby avoiding the phenomenon of solution deposition and pipeline blockage. At this time, the density of the solution in the density measurement tank is measured by the densimeter, which can truly reflect the solution density value in the evaporator, thereby improving the measurement accuracy. Attached Figure Description
[0022] To more clearly illustrate the technical solutions in this application, the accompanying drawings used in the embodiments will be briefly described below:
[0023] Figure 1 This is a schematic diagram of the structure of an evaporator solution density measuring device provided in an embodiment of this application.
[0024] Figure label:
[0025] 1-Circulation branch, 2-Gas-liquid separator, 3-Density measuring tank, 31-Density meter, 32-Protective cap, 4-Evaporator, 5-Separator inlet valve, 6-Drain valve, 7-Control valve, 8-Water inlet valve, 9-Circulation main circuit, 91-Circulation pump, 92-Heating device. Detailed Implementation
[0026] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.
[0027] Those skilled in the art will understand that, in this specification, the term "comprising" is an open-ended expression, meaning that the stated feature is present but other features are excluded. Directional terms such as "upper," "lower," "left," and "right" refer to exemplary directions based on the accompanying drawings. Features specified as "first" or "second" implicitly include one or more of that feature. Singular expressions can also be used in plural forms. "Multiple" means two or more. The terms "installed," "connected," and "linked" can refer to a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection via an intermediate medium, and it can be a connection within two components. Furthermore, "linked" can include wireless connections.
[0028] The purpose of this application is to overcome the above-mentioned technical deficiencies and propose an evaporator solution density measuring device and system to solve the technical problems of easy clogging of short tubes and large measurement errors in the prior art.
[0029] To achieve the above-mentioned technical objectives, this application adopts the following technical solution:
[0030] Firstly, this application provides an evaporator solution density measuring device, such as... Figure 1 As shown, Figure 1 This is a schematic diagram of the structure of an evaporator solution density measuring device provided in an embodiment of this application.
[0031] An evaporator solution density measuring device comprises a circulation branch 1, a gas-liquid separation tank 2, a density measuring tank 3 and a densimeter 31:
[0032] The circulation branch 1 is in communication with the evaporator 4 at its inlet and outlet.
[0033] The gas-liquid separation tank 2 and the density measuring tank 3 are arranged in sequence along the solution flow direction on the circulation branch 1. The solution at the inlet of the circulation branch 1 flows into the gas-liquid separation tank 2. The gas-liquid separation tank 2 separates the gas and liquid in the solution, ensuring that the solution entering the density measuring tank 3 is in liquid state. The separated solution flows from the gas-liquid separation tank 2 into the density measuring tank 3, and then flows out of the density measuring tank 3 back to the outlet of the circulation branch 1, forming a closed circulation.
[0034] The densimeter 31 is in communication with the density measuring tank 3. The density of the solution in the density measuring tank 3 is measured by the densimeter 31. The densimeter 31 includes but is not limited to a tuning fork densimeter 31.
[0035] The present application sets a circulation branch 1 outside the evaporator through the gas-liquid separation tank 2 and the density measuring tank 3. The solution is in a flowing state when flowing through the gas-liquid separation tank 2 and the density measuring tank 3, which is basically consistent with the state of the solution in the evaporator 4, avoiding the phenomenon of solution deposition and pipeline blockage. At this time, the density of the solution in the density measuring tank 3 is measured by the densimeter 31, which can truly reflect the density value of the solution in the evaporator 4, improving the accuracy of the measurement. The gas-liquid separation tank 2 can effectively separate the gas in the solution, reducing the influence of gas on density measurement, and avoiding the blockage problem caused by the accumulation of gas in the pipeline.
[0036] In some embodiments of the present application, the gas outlet and the liquid outlet of the gas-liquid separation tank 2 are in communication with the density measuring tank 3, respectively.
[0037] The gas outlet of the gas-liquid separation tank 2 is connected to the gas inlet of the density measuring tank 3 through a pipeline, so that the separated gas can enter the density measuring tank 3 and then escape to the atmosphere from the density measuring tank 3.
[0038] The liquid outlet of the gas-liquid separation tank 2 is connected to the liquid inlet of the density measuring tank 3 through a pipeline, so that the separated liquid can enter the density measuring tank 3 to keep flowing, which can not only eliminate the interference of gas, but also make the liquid return to the circulation branch 1 to avoid solution loss.
[0039] In some embodiments of the present application, a separation tank inlet valve 5 is further included, which is arranged between the gas-liquid separation tank 2 and the inlet of the circulation branch 1.
[0040] The separation tank inlet valve 5 is a control element that controls whether the solution flows into the branch composed of the gas-liquid separation tank 2 and the density measurement tank 3. The specific working process is as follows:
[0041] When the density of the solution needs to be measured, the operator opens the separation tank inlet valve 5, so that the solution at the inlet of the circulation branch 1 flows into the gas-liquid separation tank 2.
[0042] After the gas-liquid separation in the gas-liquid separation tank 2, the solution flows into the density measurement tank 3.
[0043] In the density measurement tank 3, the density of the solution is measured in real time by the densimeter 31 and recorded.
[0044] After the measurement is completed, the operator closes the separation tank inlet valve 5, and the solution stops flowing into the circulation branch 1, and the gas-liquid separation tank 2 and the density measurement tank 3 will also have no solution.
[0045] By controlling the separation tank inlet valve 5, the density measurement process can be started or stopped at any time, improving the operational flexibility of the system. When density measurement is not required, the separation tank inlet valve 5 can be closed to reduce the energy consumption of the solution flowing through the additional branch, thereby saving energy. Closing the separation tank inlet valve 5 can prevent external impurities or contaminants from entering the density measurement system, keeping the measurement system clean.
[0046] In some embodiments of the present application, an emptying valve 6 is also included, which is located between the gas outlet of the gas-liquid separation tank 2 and the density measurement tank 3.
[0047] When the evaporator 4 is running, the separator inlet valve and the emptying valve 6 are opened, and the control valve 7 is closed. At this time, the gas-liquid separation tank 2 and the density measurement tank 3 are put into operation, the state of the cobalt sulfate solution in the densimeter 31 tank is consistent with that in the evaporator 4, and the solution in the density measurement tank 3 is in a flowing state.
[0048] The main function of the emptying valve 6 is to discharge the gas in the gas-liquid separation tank 2 before measurement to avoid interference of the residual gas in the tank with the density measurement.
[0049] The solution flows from the circulation branch 1 into the gas-liquid separation tank 2, the separated gas flows into the external atmosphere through the emptying valve 6, and the liquid part flows into the density measurement tank 3. In the density measurement tank 3, the solution continues to flow back to the circulation branch 1.
[0050] Since the solution in the density measurement tank 3 directly comes from the circulation branch 1 and continuously flows, the state (such as temperature, concentration, etc.) of the cobalt sulfate solution in it is consistent with that in the evaporator 4.
[0051] In some embodiments of the present application, a water inlet valve 8 is also included, which is arranged at the bottom of the gas-liquid separation tank 2.
[0052] Water inlet valve 8 is located at the bottom of gas-liquid separation tank 2, used to introduce process water (usually clean water or other suitable flushing liquid) into gas-liquid separation tank 2.
[0053] In some embodiments of the present application, a control valve 7 is also included, with one end of the density measurement tank 3 communicating with the outlet of the circulation branch 1, and the control valve 7 located between the other end of the density measurement tank 3 and the outlet of the circulation branch 1.
[0054] When the density measurement tank 3 no longer needs to perform density measurement and needs to exit operation for cleaning or maintenance, the following steps will be performed:
[0055] a. Close the separation tank inlet valve 5: First, close the separation tank inlet valve 5 to prevent the solution in the circulation branch 1 from continuing to flow into the gas-liquid separation tank 2 and the density measurement tank 3.
[0056] b. Open the process water inlet valve 8: Then open the water inlet valve 8 and the control valve 7 to introduce process water into the gas-liquid separation tank 2.
[0057] c. Flushing process: Process water enters from the bottom of the gas-liquid separation tank 2 and flows upward, pushing the solution in the gas-liquid separation tank 2 and the density measurement tank 3 out through the circulation branch 1. In this way, the residual solution in the tank can be effectively flushed out, and any existing deposits or contaminants can be removed.
[0058] d. Close the valves after flushing: After flushing is complete, close the process water inlet valve 8 and the control valve 7 in turn to stop the inflow of process water and ensure that the solution in the density measurement tank 3 is completely emptied.
[0059] By introducing process water to directly flush the gas-liquid separation tank 2 and the density measurement tank 3, residual solution and deposits in the tank can be effectively removed. Regular flushing can prevent solid particles or contaminants in the solution from damaging the equipment, thereby extending the service life of the equipment. During the cleaning process, the solution in the density measurement tank 3 and the gas-liquid separation tank 2 can be completely removed to avoid the influence of residual material on the next density measurement result.
[0060] In some embodiments of the present application, a protective cap 32 is also included, which is located above the density measurement tank 3 and has a gap between the protective cap 32 and the density measurement tank 3, allowing the density measurement tank 3 to communicate with the external atmosphere through the gap.
[0061] The gap allows the density measurement tank 3 to communicate with the external atmosphere, but the protective cap 32 itself can prevent rainwater or other external impurities from directly entering the tank.
[0062] When the density meter 31 tank begins to fill with solution, the air inside the tank needs to be expelled so that the solution can flow in and fill the tank. At this time, the air is expelled through the gap of the protective cap 32, and the protective cap 32 plays a role in preventing rain and impurities, keeping the solution in the tank pure, thereby improving the accuracy of the measurement. The presence of the protective cap 32 ensures that the density measurement tank 3 can communicate with the atmosphere when it is filled with solution, so that the air in the tank can be smoothly expelled, avoiding the formation of a vacuum or pressure difference, ensuring the smooth flow of the solution.
[0063] In some embodiments of the present application, the diameter of the protective cap 32 is greater than the diameter of the density measurement tank.
[0064] The design of the protective cap 32 with a diameter greater than the diameter of the opening ensures that the protective cap 32 can completely cover the opening of the density measurement tank 3 and form an additional protection area around the opening. Because the diameter of the protective cap 32 is greater than the diameter of the opening, even in bad weather conditions, it can more effectively prevent rainwater from entering the density measurement tank 3, protecting the accuracy of the internal measurement and the integrity of the equipment. In addition to rain protection, this design can also prevent dust, insects and other impurities from entering the tank through the opening, keeping the tank environment clean. Preventing measurement errors or equipment failures that may be caused by the entry of rainwater or other external substances into the tank, thereby improving the safety of the system.
[0065] In a second aspect, the present application also provides an evaporator solution density measurement system, comprising an evaporator 4, a circulating main line 9, and a density measurement device for the evaporator solution as described in any one of the embodiments of the first aspect, the inlet and outlet of the circulating main line 9 are in communication with the bottom and side wall of the evaporator 4 respectively, and the inlet and outlet of the circulating branch line 1 are in communication with the circulating main line 9 in turn along the solution flow direction.
[0066] The evaporator 4 adopts a single-effect evaporator 4, and the connection of the evaporator 4 with the circulating main line 9 ensures that the solution in the evaporator 4 can flow into the circulating branch line 1 and be subjected to density measurement by the density measurement device.
[0067] The tuning fork density meter 31 is installed in the density measurement tank 3, ensuring that part or all of the tuning fork can be immersed in the solution in the tank. When the tuning fork density meter 31 is activated, the built-in excitation device will make the tuning fork vibrate at a specific frequency. The vibration frequency of the tuning fork will change due to the density of the solution in the tank. The detection circuit built-in the tuning fork density meter 31 will monitor the vibration frequency of the tuning fork in real time. According to the change of the vibration frequency of the tuning fork, the microprocessor built-in the density meter 31 will use the calibration curve or algorithm to calculate the density of the solution. Then send the density information of the solution to the upper computer to realize real-time monitoring.
[0068] Since the solution state in the density measurement tank 3 is basically consistent with the solution state in the evaporator 4, the tuning fork densimeter 31 can measure the real solution density in this environment, thereby accurately reflecting the density change of the solution in the evaporator 4. The tuning fork densimeter 31 does not depend on the conductivity or dielectric constant of the solution, so it will not be disturbed by bubbles, particles or contaminants in the solution during measurement. The system can monitor the density of the solution in the evaporator 4 in real time, so as to adjust the operating parameters of the evaporator 4 in time and optimize the production process.
[0069] In some embodiments of the present application, a circulating pump 91 is further included, which is installed in the circulation branch 1, and the solution flows in one direction in the circulation branch 1.
[0070] The circulating pump 91 provides power to make the solution flow in the circulation branch 1 in a predetermined direction.
[0071] The solution flows out from a certain part of the evaporator 4, is pressurized by the circulating pump 91, and then flows back to another part of the evaporator 4.
[0072] The circulating pump 91 can ensure the continuous flow of the solution in the circulation branch 1 and prevent it from stagnating due to gravity or resistance. The stable flow maintained by the circulating pump 91 can ensure that the solution state in the density measurement tank 3 is consistent with the solution state in the evaporator 4, thereby improving the accuracy of density measurement.
[0073] In some embodiments of the present application, a heating device 92 is further included, which is installed in the circulation branch 1.
[0074] When the solution is pressurized by the circulating pump 91, it will flow through the heating device 92. The heating device 92 heats the solution to maintain or change the temperature of the solution. Thus, the concentration of the solution in the evaporator 4 can be controlled and the solution can be prevented from supercooling.
[0075] By heating the solution, the evaporation rate of the solution can be increased, thereby improving the overall efficiency of the evaporator 4. The temperature of the solution can be maintained within a certain range, and the heating device 92 can prevent the solution from supercooling due to low ambient temperature.
[0076] In some embodiments of the present application, the evaporator 4, the gas-liquid separation tank 2 and the density measurement tank 3 are arranged side by side, and the evaporator 4 is provided with a highest liquid level line, the height of which is less than the height of the protective cap 32.
[0077] When the evaporator 4, the gas-liquid separation tank 2 and the density measurement tank 3 are connected by pipes, the solution will reach equilibrium in these containers, and the liquid level height is the same.
[0078] By the principle of communication vessel, it can be ensured that the solution in the evaporator 4 will not exceed the highest liquid level line, preventing the solution from overflowing. The solution is automatically balanced between the evaporator 4, the gas-liquid separation tank 2 and the density measurement tank 3, without the need for additional pumping equipment, reducing energy consumption and maintenance costs. The height of the protective cap 32 is higher than the highest liquid level line of the evaporator 4, ensuring that even at the highest liquid level, there will be no solution overflowing the density measurement tank 3.
[0079] Compared with the prior art, the technical scheme provided by the present application has the beneficial technical effects including:
[0080] The present application sets a branch communicating with the circulation branch 1 outside the circulation branch 1 through the gas-liquid separation tank 2 and the density measurement tank 3, and the solution is in a flowing state when flowing through the gas-liquid separation tank 2 and the density measurement tank 3, which is basically consistent with the state of the solution in the evaporator 4, avoiding the phenomenon of solution deposition and pipeline blockage. At this time, by measuring the density of the solution in the density measurement tank 3 through the densimeter 31, the density of the solution in the evaporator 4 can be truly reflected, improving the accuracy of measurement.
[0081] Those skilled in the art in this technical field can understand that the steps, measures and schemes in the various operations, methods and processes discussed in the present application can be alternated, changed, rearranged, decomposed, combined or deleted.
[0082] The specific embodiments of the present application described above do not constitute a limitation on the scope of protection of the present application. Any various other corresponding changes and modifications made in accordance with the technical concept of the present application should be included in the scope of protection of the claims of the present application.
Claims
1. A device for measuring the density of an evaporator solution, characterized in that, include: A circulation branch, the inlet and outlet of which are respectively connected to the evaporator; A gas-liquid separator and a density measuring tank are sequentially arranged on the circulation branch along the solution flow direction; A densitometer, which is connected to the density measuring tank.
2. The evaporator solution density measuring device according to claim 1, characterized in that, The gas outlet and liquid outlet of the gas-liquid separator are respectively connected to the density measuring tank.
3. The evaporator solution density measuring device according to claim 2, characterized in that, It also includes a separator inlet valve, which is located between the gas-liquid separator and the circulation branch inlet.
4. The evaporator solution density measuring device according to claim 2, characterized in that, It also includes a vent valve and a protective cap. The vent valve is located between the gas outlet of the gas-liquid separator and the density measuring tank. The protective cap is located above the density measuring tank and there is a gap between the protective cap and the density measuring tank. The density measuring tank is connected to the outside atmosphere through the gap.
5. The evaporator solution density measuring device according to claim 4, characterized in that, The diameter of the protective cap is larger than the diameter of the density measuring tank.
6. The evaporator solution density measuring device according to claim 1, characterized in that, It also includes a water inlet valve, which is located at the liquid outlet of the gas-liquid separator.
7. The evaporator solution density measuring device according to claim 6, characterized in that, It also includes a control valve, with both ends of the density measuring tank connected to the outlet of the circulation branch, and the control valve located between one end of the density measuring tank and the outlet of the circulation branch.
8. An evaporator solution density measurement system, characterized in that, The device includes an evaporator, a circulation trunk line, and an evaporator solution density measuring device as described in any one of claims 1 to 7. The inlet and outlet of the circulation trunk line are respectively connected to the evaporator, and the inlet and outlet of the circulation branch line are sequentially connected to the circulation trunk line along the solution flow direction.
9. The evaporator solution density measurement system according to claim 8, characterized in that, It also includes a circulation pump and a heating device, the circulation pump being installed in the circulation main line to allow the solution to flow in one direction, and the heating device being installed in the circulation branch line and located on the side of the circulation pump facing the outlet of the circulation main line.
10. The evaporator solution density measurement system according to claim 8, characterized in that, The evaporator is arranged in parallel with the gas-liquid separator and the density measuring tank. The evaporator is equipped with a maximum liquid level line, the height of which is less than the height of the protective cap.