Chemical dosing device for adjusting pH

Abstract

The utility model relates to the technical field of chemical dosing equipment, concretely relates to a chemical dosing device of adjusting pH value, including the controller of reaction bucket and setting on the lateral wall of reaction bucket, the material inlet pipe of connecting inlet valve is provided at the top of reaction bucket, the reaction liquid output pipe is connected with the bottom of reaction bucket, the pH value sensor is arranged in the reaction liquid output pipe, the neutralization liquid reversing valve is provided in the reaction liquid output pipe tail end, the neutralization liquid reversing valve is connected with output pipe and neutralization liquid reflux pipe respectively, the tail end of neutralization liquid reflux pipe is connected in the upper portion of reaction bucket, the upper portion of reaction bucket other side is provided with dosing pipe, the dosing pipe other end is connected with the reagent input pipe, the reagent input pipe is connected with dosing output pipe and dosing spare output pipe through dosing reversing valve respectively, dosing output pipe links to each other with dosing tank, dosing spare output pipe links to each other with spare dosing tank.

Description

Technical Field

[0001] This utility model relates to the field of chemical dosing equipment technology, specifically to a chemical dosing device for adjusting pH. Background Technology

[0002] In the complex systems of petrochemical production, precise control of pH is a key factor in ensuring efficient and stable operation. A suitable pH solution plays a crucial role in the performance of catalysts, significantly extending their lifespan, reducing production costs, and optimizing the reaction environment to effectively improve the efficiency of chemical reactions, thereby increasing the yield of chemical products. Furthermore, pH has a direct and profound impact on the quality and purity of chemical products; precise control of solution pH is essential to ensuring that product quality meets high standards. Therefore, in chemical production processes, adjusting the pH of the solution through neutralization reactions using chemicals has become an indispensable and crucial step.

[0003] Under current technological conditions, the neutralization of solutions in chemical production typically relies on metering pumps. Metering pumps, as commonly used fluid transport devices, can add reagents to the reaction solution according to a pre-set flow rate. However, the operating conditions in petrochemical production are complex and variable; fluctuations in parameters such as reaction temperature, pressure, and material flow rate can all affect the outcome of the neutralization reaction. With constantly changing reaction conditions, relying solely on metering pumps to add reagents according to fixed parameters often fails to ensure that the pH of the neutralized solution meets the production requirements. When the pH of the reaction solution is unsuitable, existing technologies lack effective monitoring and feedback mechanisms, making it impossible to accurately determine the required dosage, resulting in significant uncertainty in the dosing process. Furthermore, the entire dosing adjustment process relies primarily on manual operation or simple program control, making it difficult to quickly adjust based on real-time reaction conditions, let alone achieve automatic adjustment. This not only increases labor costs and operational difficulty but may also lead to unstable product quality, low production efficiency, and even safety hazards. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a chemical dosing device for adjusting pH. It not only monitors the pH value of the reaction solvent in real time using a pH sensor, but also precisely adjusts the dosage of the chemical to ensure the neutralized solution after the reaction reaches a suitable pH value. Furthermore, in the event of insufficient reagent in the dosing tank, a backup dosing tank can continuously add reagent to the reaction vessel, ensuring a stable and continuous reaction.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows: a chemical dosing device for adjusting pH, comprising a reaction tank and a controller installed on the side wall of the reaction tank. A material inlet pipe connected to an inlet valve is installed at the top of the reaction tank, and a reaction liquid output pipe is connected to the bottom of the reaction tank. A pH sensor is installed inside the reaction liquid output pipe, and a neutralization liquid reversing valve is installed at the end of the reaction liquid output pipe. The neutralization liquid reversing valve is connected to an output pipe and a neutralization liquid return pipe, respectively. The end of the neutralization liquid return pipe is connected to the upper part of the reaction tank. A dosing pipe is installed on the other side of the upper part of the reaction tank, and a reagent input pipe is connected to the other end of the dosing pipe. The reagent input pipe is connected to a dosing output pipe and a standby dosing output pipe through the dosing reversing valve, respectively. The dosing output pipe is connected to a dosing tank, and the standby dosing output pipe is connected to a standby dosing tank.

[0006] Furthermore, a stirring motor is installed at the top center of the reaction tank, and a stirring shaft penetrating the reaction tank is installed at the output end of the stirring motor.

[0007] Furthermore, stirring blades are provided on the outer side of the stirring shaft.

[0008] Furthermore, a pipeline pump is installed on the reaction liquid output pipe.

[0009] Furthermore, a metering pump is installed between the dosing pipe and the drug input pipe.

[0010] Furthermore, the metering pump motor is a servo motor.

[0011] Furthermore, a support frame is provided on the side wall of the reaction vessel, and the metering pump is mounted on the support frame.

[0012] Furthermore, a liquid level sensor is installed inside the dosing tank.

[0013] The beneficial effects achieved by this utility model are as follows:

[0014] 1. This invention incorporates a pH sensor at the reaction liquid output pipe, enabling real-time monitoring of the reaction liquid's pH value and synchronous data transmission to the controller. When the pH value fails to meet production requirements, the controller rapidly triggers the neutralization liquid reversing valve, causing the substandard reaction liquid to flow back to the reaction tank via the neutralization liquid return pipe, preventing it from entering the production system and affecting subsequent processes. Simultaneously, the controller precisely controls the dosage by adjusting the servo motor speed of the metering pump, ensuring that the pH value of the solution in the reaction tank stabilizes at the production standard after the second reaction, fundamentally solving the problem of precise adjustment in traditional dosing devices.

[0015] 2. The dosing tank of this utility model is equipped with a liquid level sensor, which can monitor the remaining amount of reagent in real time. When the liquid level in the main dosing tank is too low, the liquid level sensor immediately sends a signal to the controller. The controller quickly drives the dosing reversing valve to switch and automatically activates the backup dosing tank. The metering pump continuously supplies reagent to the reaction tank, avoiding reaction stagnation or product defects due to reagent interruption. This dual dosing tank linkage design effectively ensures the continuity and stability of production and reduces the frequency and difficulty of manual intervention.

[0016] 3. This utility model integrates core components such as pH sensor, liquid level sensor, metering pump, neutralization liquid reversing valve, and dosing reversing valve into a closed-loop automatic control system through a controller. It eliminates the need for real-time manual monitoring and operation. The system can autonomously complete a series of actions such as pH value judgment, dosing adjustment, reagent tank switching, and reaction liquid reflux / output based on real-time monitoring data, which greatly improves the efficiency and accuracy of pH adjustment and reduces human error. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is the front view of the present invention;

[0019] Figure 3 This is a top view of the present invention;

[0020] Figure 4 In this utility model Figure 1 A partial cross-sectional view of the reaction vessel.

[0021] The markings in the diagram are as follows: 1. Reaction tank; 2. Stirring motor; 201. Stirring shaft; 3. Inlet valve; 301. Material inlet pipe; 4. Support frame; 5. Metering pump; 6. Reaction liquid output pipe; 7. pH sensor; 8. Pipeline pump; 9. Neutralization liquid reversing valve; 10. Neutralization liquid return pipe; 11. Dosing tank; 1101. Liquid level sensor; 12. Backup dosing tank; 13. Dosing reversing valve; 14. Dosing output pipe; 15. Backup dosing output pipe; 16. Dosing pipe; 17. Chemical input pipe; 18. Output pipe; 19. Controller. Detailed Implementation

[0022] To better understand the purpose, structure, and function of this utility model, the following description, in conjunction with the accompanying drawings, provides a more detailed account of a chemical dosing device for adjusting pH.

[0023] Please see Figure 1-4A chemical dosing device for adjusting pH includes a reaction tank 1. A material inlet pipe 301 is installed at the top of the reaction tank 1, and an inlet valve 3 is connected to the material inlet pipe 301. A stirring motor 2 is installed at the center of the upper part of the reaction tank 1, and a stirring shaft 201 is connected to the lower part of the stirring motor 2. A support frame 4 is installed on one side of the reaction tank 1, and a metering pump 5 is installed on the upper part of the support frame 4. A dosing pipe 16 is installed at the outlet of the metering pump 5 and connected to the reaction tank 1. A reagent input pipe 17 is installed at the inlet of the metering pump 5. A dosing reversing valve 13 is connected to the reagent input pipe 17. The dosing reversing valve 13 is connected to the dosing output pipe 14 and the dosing standby output pipe 15. The dosing output pipe 14 is connected to the dosing tank 11, and the dosing standby output pipe 15 is connected to the standby dosing tank 12. A reaction liquid output pipe 6 is provided on the other side of the reaction tank 1. A pipeline pump 8 is provided on the reaction liquid output pipe 6. The other end of the reaction liquid output pipe 6 is connected to a neutralization liquid reversing valve 9. The other end of the neutralization liquid reversing valve 9 is connected to an output pipe 18 that enters the production system.

[0024] Please see Figure 1-3 The neutralizing liquid reversing valve 9 is connected to the neutralizing liquid return pipe 10 at the top and is connected to the reaction tank 1. When the pH value of the reaction liquid does not meet the production standard, the neutralizing liquid reversing valve 9 connected to the reaction liquid output pipe 6 is activated, closing the pipeline from the output pipe 18 into the production system. The liquid then re-enters the reaction tank through the neutralizing liquid return pipe to continue the reaction until it reaches the pH value required by the production system.

[0025] See Figure 1-2 The reaction liquid output pipe 6 is equipped with an acid-base sensor 7, which can monitor the pH value of the reaction liquid in the reaction tank 1 in real time and transmit the signal to the controller 19 in a timely manner.

[0026] See Figure 1-3 The dosing tank 11 is equipped with a liquid level sensor 1101, which can monitor the liquid level in the dosing tank 11 in a timely manner. When the liquid level in the dosing tank 11 is too low, the liquid level sensor 1101 transmits a signal to the controller 19. The controller 19 sends a signal to activate the dosing reversing valve 13, so that the reagent in the standby dosing tank 12 enters the reaction tank 1 through the metering pump 5, thereby ensuring the timely supply of reagent and avoiding the failure of the reaction solution due to sudden interruption of reagent supply.

[0027] See Figure 1-3 The metering pump 5 is a servo motor. The speed of the servo motor is adjusted by the output signal of the controller 19 to control the amount of chemicals added into the reaction tank 1, so that the reaction solution in the reaction tank 1 reaches the pH value required by the production system.

[0028] See Figure 1-3A controller 19 is installed on one side of the reaction tank 1. The controller 19 is linearly connected to the metering pump 5 motor, pH sensor 7, liquid level sensor 1101, neutralization liquid reversing valve 9, and dosing reversing valve 13. The controller 19 can receive signals and react according to the received signals, sending signals to adjust the speed of the metering pump 5, and to activate the neutralization liquid reversing valve 9 and the dosing reversing valve 13.

[0029] In this invention, materials enter the reaction tank 1 through the inlet valve 3. The reagents in the dosing tank 11 enter the reaction tank 1 through the dosing output pipe 14, metering pump 5, and dosing pipe 16. Under the action of the stirring shaft 201, they are mixed and reacted with the materials. The resulting reaction solution enters the production system through the reaction liquid output pipe 6, neutralization liquid reversing valve 9, and output pipe 18. When the pH sensor 7 installed on the reaction liquid output pipe 6 detects that the pH value does not match the production requirements, it transmits a signal to the controller 19. The controller 19 then transmits a signal to the neutralization liquid reversing valve 9. The neutralization liquid reversing valve 9 actuates, closing the pipe to the output pipe 18 and opening the pipe to the neutralization liquid return pipe 10, allowing the reaction liquid to re-enter the reaction tank 1. Simultaneously, the controller 19 transmits a signal to the metering pump 5, adjusting the metering... The servo motor speed of the metering pump 5 controls the amount of chemicals added to the reaction tank, ensuring that the reaction solution in the tank continues to react until it reaches the pH value required for production. Additionally, the level sensor 1101 installed on the dosing tank 11 monitors the liquid level in the tank in real time. When the liquid level in the dosing tank 11 is too low, the level sensor 1101 transmits a signal to the controller 19. The controller 19 then sends a signal to activate the dosing reversing valve 13, closing the dosing output pipe 14. This allows the chemicals in the standby dosing tank 12 to enter the reaction tank 1 through the metering pump 5, ensuring a timely supply of chemicals. This solution also uses an acid-base sensor to monitor the pH value of the reaction solvent in real time and precisely controls the amount of chemicals added, ensuring that the neutralized solution after the reaction reaches the qualified pH value, thus ensuring efficient and stable production.

[0030] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. A chemical dosing device for adjusting pH, characterized in that: The system includes a reaction tank (1) and a controller (19) mounted on the side wall of the reaction tank (1). A material inlet pipe (301) connected to an inlet valve (3) is located at the top of the reaction tank (1). A reaction liquid output pipe (6) is connected to the bottom of the reaction tank (1). An acid-base level sensor (7) is installed inside the reaction liquid output pipe (6). A neutralization liquid reversing valve (9) is located at the end of the reaction liquid output pipe (6). The neutralization liquid reversing valve (9) is connected to an output pipe (18) and a neutralization liquid return pipe (10). The end of the neutralizing liquid reflux pipe (10) is connected to the upper part of the reaction tank (1). A dosing pipe (16) is provided on the other side of the upper part of the reaction tank (1). The other end of the dosing pipe (16) is connected to a drug input pipe (17). The drug input pipe (17) is connected to a dosing output pipe (14) and a dosing backup output pipe (15) through a dosing reversing valve (13). The dosing output pipe (14) is connected to the dosing tank (11), and the dosing backup output pipe (15) is connected to the backup dosing tank (12).

2. The chemical dosing device for adjusting pH according to claim 1, characterized in that: A stirring motor (2) is provided at the top center of the reaction tank (1), and a stirring shaft (201) that passes through the reaction tank (1) is provided at the output end of the stirring motor (2).

3. A chemical dosing device for adjusting pH according to claim 2, characterized in that: A stirring fan blade is provided on the outside of the stirring shaft (201).

4. A chemical dosing device for adjusting pH according to claim 1, characterized in that: A pipeline pump (8) is installed on the reaction liquid output pipe (6).

5. A chemical dosing device for adjusting pH according to claim 1, characterized in that: A metering pump (5) is installed between the dosing pipe (16) and the drug input pipe (17).

6. A chemical dosing device for adjusting pH according to claim 5, characterized in that: The metering pump (5) motor is a servo motor.

7. A chemical dosing device for adjusting pH according to claim 5, characterized in that: The reaction vessel (1) is provided with a support frame (4) on its side wall, and the metering pump (5) is provided on the support frame (4).

8. A chemical dosing device for adjusting pH according to claim 1, characterized in that: The dosing tank (11) is equipped with a liquid level sensor (1101).

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