An automatic preparation device for adjuvants

Abstract

The utility model relates to a chemical production technical field provides an automatic preparation device of adjuvant, solves the defect that manual preparation sodium carbonate solution exists in prior art complicated operation, poor standardization and unstable concentration. The utility model includes: preparation tank is used for containing water and sodium carbonate and carries out the mixture, first liquid level detection part, installs in the preparation tank, water supplement part includes water source through water supplement pipeline with the preparation tank intercommunication and sets up on water supplement pipeline water supplement valve, stirring part includes drive motor and is driven by drive motor, and the stirring paddle that extends into the preparation tank, buffer tank, import is connected with the preparation tank through batching pump, through with the original many rounds, many step operation, integrates as single flow by controller according to preset logic automatic execution, has greatly reduced the intervention frequency and labor intensity of operator, has avoided step omission or operation sequence error simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of chemical production technology, specifically to an automatic auxiliary material preparation device. Background Technology

[0002] In the ion-exchange membrane caustic soda electrolysis process, 2NaCl + 2H₂O = electrolysis = 2NaOH + H₂O 2 +Cl 2 The core is to control the quality of refined salt water.

[0003] In brine treatment systems, purchased salt comes from different sea areas and contains chemicals such as calcium, magnesium, and sulfate. These substances can damage the performance of the electrolytic cell. Therefore, after the purchased fixed salt is dissolved, it is necessary to add auxiliary materials to remove calcium, magnesium, sulfate, etc.

[0004] Currently, the preparation and transportation of sodium carbonate are done manually, which results in numerous operations and non-standard preparation steps, and also affects the stability of sodium carbonate concentration. Utility Model Content

[0005] Therefore, in view of the above problems, this utility model provides an automatic auxiliary material preparation device, which solves the defects of cumbersome operation, poor standardization and unstable concentration in the manual preparation of sodium carbonate solution in the prior art.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0007] An automatic excipient preparation device, comprising:

[0008] A mixing tank is used to hold and mix water and sodium carbonate;

[0009] The first liquid level detection component is installed in the preparation tank to detect the liquid level in the preparation tank in real time and generate a liquid level signal.

[0010] The water replenishment component includes a water source connected to the preparation tank via a water replenishment pipe, and a water replenishment valve installed on the water replenishment pipe;

[0011] The stirring component includes a drive motor and a stirring paddle driven by the drive motor and extending into the preparation tank;

[0012] The buffer tank has an inlet connected to the preparation tank via a dispensing pump, and an outlet connected to a delivery pump. A second liquid level detection component is installed inside the buffer tank.

[0013] The controller is electrically connected to the first liquid level detection component, the water supply valve, the drive motor, the batching pump, the delivery pump, and the second liquid level detection component.

[0014] Furthermore, the stirring component also includes a frequency converter disposed between the drive motor and the controller.

[0015] Furthermore, the first liquid level detection component and the second liquid level detection component are liquid level sensors or liquid level switches.

[0016] Furthermore, the controller adopts a DCS distributed control system.

[0017] Furthermore, it also includes a concentration detector, which is installed in the preparation tank and electrically connected to the controller, for detecting the concentration of the sodium carbonate solution and feeding the concentration signal back to the controller.

[0018] Furthermore, the agitator is an anchor agitator, a paddle agitator, or a turbine agitator.

[0019] Furthermore, the water supply valve is a pneumatic shut-off valve or an electric regulating valve.

[0020] Furthermore, the top of the buffer tank is equipped with an automatic vent valve.

[0021] Compared with the prior art, the beneficial effects of this utility model are:

[0022] 1. This utility model integrates the original manual multi-round, multi-step operations such as "starting the pump, starting the agitator, adding water, and feeding materials" into a single process that is automatically executed by the controller according to preset logic. This greatly reduces the frequency of operator intervention and labor intensity, while avoiding omissions or errors in the order of operations due to human factors, ensuring the standardization and normalization of the preparation process.

[0023] 2. The entire preparation process of this utility model is completed automatically and continuously by the controller, eliminating the intervals and delays between manual operations. As stated in the disclosure document, it can shorten the preparation time by 40%. At the same time, the automated system can run 24 hours a day without interruption, which not only improves the efficiency of single preparation, but also enhances the overall production capacity and operational reliability of the brine refining system. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model.

[0025] Explanation of icon numbers:

[0026] 1. Preparation tank; 2. Water supply pipe; 3. Water supply valve; 4. Drive motor; 5. Stirring paddle; 6. Buffer tank; 7. Batching pump; 8. Transfer pump. Detailed Implementation

[0027] The following will describe the implementation of this utility model in detail with reference to specific embodiments, so that the process of how this utility model uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0028] Example: Figure 1 As shown, this embodiment provides an automatic auxiliary material preparation device, specifically used to automatically prepare a sodium carbonate solution with a concentration of about 12% in the brine refining process of ion-exchange membrane caustic soda electrolysis.

[0029] An automatic excipient preparation device includes: a preparation tank 1 for containing and mixing water and sodium carbonate;

[0030] A first liquid level detection component (not shown in the figure) is installed in the preparation tank 1 to detect the liquid level in the preparation tank 1 in real time and generate a liquid level signal; a water replenishment component includes a water source connected to the preparation tank 1 through a water replenishment pipe 2 and a water replenishment valve 3 installed on the water replenishment pipe; a stirring component includes a drive motor 4 and a stirring paddle 5 driven by the drive motor 4 and extending into the preparation tank 1; a buffer tank 6, the inlet of which is connected to the preparation tank 1 through a batching pump 7, and the outlet of the buffer tank 6 is connected to a delivery pump 8, a second liquid level detection component (not shown in the figure) is provided in the buffer tank 6, and an automatic vent valve (not shown in the figure) is provided on the top of the buffer tank 6; a controller (not shown in the figure) is electrically connected to the first liquid level detection component, the water replenishment valve 3, the drive motor 4, the batching pump 7, the delivery pump 8, and the second liquid level detection component.

[0031] In this embodiment, both the first liquid level detection component and the second liquid level detection component are liquid level sensors. In other preferred embodiments, the first liquid level detection component and the second liquid level detection component may also be liquid level switches.

[0032] In this embodiment, the controller adopts a DCS distributed control system. In other preferred embodiments, the controller may also be a programmable logic controller or an industrial computer.

[0033] In this embodiment, the agitator 5 is a paddle-type agitator. In other preferred embodiments, the agitator may also be an anchor-type agitator or a turbine-type agitator.

[0034] In this embodiment, the water supply valve 3 is a pneumatic shut-off valve. In other preferred embodiments, the water supply valve may also be an electric regulating valve.

[0035] In other preferred embodiments, the stirring component further includes a frequency converter (not shown in the figure) disposed between the drive motor 4 and the controller. The controller can be configured to control the frequency converter so that the drive motor 4 runs in a preset speed mode. For example, it can first run at high speed for 4 minutes for rapid dispersion, then run at medium speed for 20 minutes for uniform mixing, and finally run at low speed for 6 minutes to prevent precipitation. This method can further ensure the uniformity of the solution.

[0036] In other preferred embodiments, the device further includes a concentration detector (not shown in the figure). This concentration detector is preferably an online density meter, whose probe is directly installed in the preparation tank 1 and electrically connected to the controller. The concentration detector monitors the concentration of the sodium carbonate solution in real time and feeds the concentration signal back to the controller. The controller can compare this concentration value with a target value. If a deviation exists, the first preset time (i.e., feeding time) or the second preset liquid level value (i.e., water addition amount) for the next cycle can be fine-tuned to achieve closed-loop control and make the concentration control more precise.

[0037] The working principle and automatic batching process of this utility model are as follows: The controller is pre-programmed to execute the following sequential control logic:

[0038] S1, Initialization configuration count Y = 0.

[0039] S2. When the liquid level in the preparation tank 1 is lower than the first liquid level (e.g., lower than 25% of the total volume of the preparation tank 1), open the water replenishment valve to replenish water.

[0040] S3. When the liquid level in the preparation tank 1 is replenished to a level higher than the second liquid level (e.g., higher than 85% of the total volume of the preparation tank 1), close the water supply valve, record the initial liquid level value X in the current preparation tank 1, and after timing for 5 minutes, calculate whether the liquid level deviation value is less than 2. If the liquid level deviation value is ≥2, a liquid level deviation alarm is issued, the sequential control logic stops at the current step, and manual intervention is required to determine whether to stop or continue the sequential control logic. If the liquid level deviation value is <2, proceed to the next step.

[0041] S4. On-site feeding of materials into the preparation tank 1 in packages and recording the number of feedings. When the number of feedings equals 6, start the drive motor 4 to drive the stirring paddle 5 for stirring.

[0042] S5. When the drive motor starts for ≥30 minutes, and the liquid level in buffer tank 6 is ≤ the third liquid level (e.g., the liquid level in buffer tank 6 is ≤ 30% of the total volume of the buffer tank), and the liquid level in the priming tank of the transfer pump 8 is ≥85% (the priming tank is a supporting component of the transfer pump 8, not shown in the figure).

[0043] S6, start the conveying pump 8, and reset the feeding count to zero.

[0044] S7. When the liquid level in the preparation tank 1 is ≤55%, stop the drive motor 4 and select one of the following two sequential control logic options:

[0045] a. When the liquid level in the preparation tank 1 is ≤25%, stop the delivery pump 8, record the number of preparations Y = Y + 1, and determine whether the liquid level in the buffer tank 6 is ≤55%. If the liquid level in the buffer tank 6 is ≤55%, then repeat the process to step S2. If the liquid level in the buffer tank 6 is >55%, then end the sequence control logic.

[0046] b. When the liquid level in buffer tank 6 is ≥80%, stop the delivery pump 8, and when the liquid level in buffer tank 6 is ≤60%, continue the cycle to step S6.

[0047] Although the present invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims, and all such changes shall be within the scope of protection of the present invention.

Claims

1. An automatic auxiliary material preparation device, characterized in that, include: A mixing tank is used to hold and mix water and sodium carbonate; The first liquid level detection component is installed in the preparation tank to detect the liquid level in the preparation tank in real time and generate a liquid level signal. The water replenishment component includes a water source connected to the preparation tank via a water replenishment pipe, and a water replenishment valve installed on the water replenishment pipe; The stirring component includes a drive motor and a stirring paddle driven by the drive motor and extending into the preparation tank; The buffer tank has an inlet connected to the preparation tank via a dispensing pump, and an outlet connected to a delivery pump. A second liquid level detection component is installed inside the buffer tank. The controller is electrically connected to the first liquid level detection component, the water supply valve, the drive motor, the batching pump, the delivery pump, and the second liquid level detection component.

2. The automatic auxiliary material preparation device according to claim 1, characterized in that, The stirring component also includes a frequency converter disposed between the drive motor and the controller.

3. The automatic auxiliary material preparation device according to claim 1, characterized in that: The first liquid level detection component and the second liquid level detection component are liquid level sensors or liquid level switches.

4. The automatic auxiliary material preparation device according to claim 1, characterized in that: The controller adopts a DCS distributed control system.

5. The automatic auxiliary material preparation device according to claim 1, characterized in that: It also includes a concentration detector, which is installed in the preparation tank and electrically connected to the controller, for detecting the concentration of the sodium carbonate solution and feeding the concentration signal back to the controller.

6. The automatic auxiliary material preparation device according to claim 1, characterized in that: The agitator is an anchor agitator, a paddle agitator, or a turbine agitator.

7. The automatic auxiliary material preparation device according to claim 1, characterized in that: The water supply valve is either a pneumatic shut-off valve or an electric regulating valve.

8. The automatic auxiliary material preparation device according to claim 1, characterized in that: The top of the buffer tank is equipped with an automatic vent valve.

Images