An automatic alkali injection neutralization device for a chlorobenzene recovery system

Abstract

This utility model discloses an automatic alkali injection and neutralization device for a chlorobenzene recovery system, including a neutralization reactor. An alkali preparation tank is located on one side of the neutralization reactor, and a concentration sensor is installed inside the alkali preparation tank. A concentrate storage tank is located at the top of the alkali preparation tank, and the concentrate storage tank is connected to the alkali preparation tank via a metering pump. A pure water pipe is connected to one side of the alkali preparation tank. This utility model relates to the field of chlorobenzene recovery technology. It utilizes a liquid level probe and a pH sensor inside the neutralization reactor to measure the volume and pH value of the acidic wastewater in the chlorobenzene recovery system. A metering alkali injection component quantitatively extracts the alkaline treatment liquid from the intermediate alkali storage tank and adds it to the neutralization reactor. An impact stirring component further stirs the alkaline treatment liquid and acidic wastewater, improving the neutralization reaction rate. The system is complete, with low manual intervention and high automation efficiency.

Description

Technical Field

[0001] This utility model relates to the field of chlorobenzene recovery technology, specifically to an automatic alkali injection neutralization device for a chlorobenzene recovery system. Background Technology

[0002] A chlorobenzene recovery system refers to a comprehensive treatment device used to recover and treat waste liquids, waste gases, and waste materials generated during the production or use of chlorobenzene. It mainly includes recovery equipment, a wastewater treatment unit, and a tail gas treatment system. The wastewater recovery and treatment unit typically converts acidic wastewater into white acid products through neutralization and adsorption processes, reducing treatment costs and water waste. During acidic wastewater treatment, neutralization with alkali solutions (such as NaOH) is usually necessary to prevent equipment corrosion and adjust the pH value for subsequent treatment. However, existing alkali injection neutralization dosing systems have low automation levels and require highly skilled operators. Excessive alkali injection may result in residual reagents (such as NaOH) affecting the COD index of the effluent; insufficient alkali injection may lead to incomplete neutralization, affecting subsequent treatment effects and causing equipment corrosion. Therefore, this project was developed to address these issues through in-depth research. Utility Model Content

[0003] To address the shortcomings of existing technologies, this invention provides an automatic alkali injection and neutralization device for a chlorobenzene recovery system, which solves the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an automatic alkali injection and neutralization device for a chlorobenzene recovery system, comprising a neutralization reactor, an alkali preparation tank on one side of the neutralization reactor, a concentration sensor inside the alkali preparation tank, a concentrate storage tank on the top of the alkali preparation tank, the concentrate storage tank being connected to the alkali preparation tank via a metering pump, a pure water pipe connected to one side of the alkali preparation tank, a flow valve and a pulse output turbine flow meter installed on the pure water pipe, an intermediate alkali storage tank connected to the outlet of the alkali preparation tank, the intermediate alkali storage tank being connected to the neutralization reactor via a metering alkali injection assembly, a pH sensor and a level probe inside the neutralization reactor, and impact stirring assemblies inside both the neutralization reactor and the alkali preparation tank.

[0005] The aforementioned quantitative alkali injection assembly includes a mounting frame, an injection chamber, an injection control component, and a three-way liquid guiding component. The injection chamber is located inside the mounting frame and on one side of the intermediate alkali storage tank. The injection control component is mounted on the mounting frame and one end extends into the injection chamber. The three-way liquid guiding component is located on one end of the injection chamber and is connected to both the intermediate alkali storage tank and the neutralization reaction vessel.

[0006] The above-mentioned injection control components include a lead screw module, a push rod, and a rubber stopper. The lead screw module is mounted on a mounting frame. One end of the push rod is connected to the moving end of the lead screw module, and the other end extends into the injection chamber. The outer ring surface of the rubber stopper slides and seals with the inner ring surface of the injection chamber. The rubber stopper is fixedly connected to the push rod through an annular seat.

[0007] The aforementioned three-way liquid guiding component includes a three-way connector, a liquid extraction pipe, and a liquid injection pipe. One end of the three-way connector is connected to the liquid injection chamber. One end of the liquid extraction pipe is connected to the three-way connector, and the other end is connected to the intermediate alkaline storage tank. A one-way liquid extraction valve is installed on the liquid extraction pipe, and the conduction direction of the one-way liquid extraction valve points to the side of the three-way connector. One end of the liquid injection pipe is connected to the three-way connector, and the other end is connected to the neutralization reaction vessel. A one-way liquid injection valve is installed on the liquid injection pipe, and the conduction direction of the one-way liquid injection valve points to the side of the neutralization reaction vessel.

[0008] The neutralization reactor is equipped with an annular tube, and injection ports are evenly distributed on the lower side wall of the annular tube. The annular tube and the injection tube are connected by a transition tube, and an electromagnetic flow meter is installed on the transition tube.

[0009] The aforementioned intermediate alkaline storage tank is equipped with a liquid level sensor. Beneficial effects

[0010] This invention provides an automatic alkali injection and neutralization device for a chlorobenzene recovery system. It offers the following advantages: This automatic alkali injection and neutralization device for a chlorobenzene recovery system automatically prepares concentrated alkali (such as NaOH) and pure water using an alkali preparation tank. An impact stirring component accelerates the mixing efficiency of the concentrated alkali and pure water, obtaining an alkaline treatment solution of the designed concentration. The alkaline treatment solution is then transferred to an intermediate alkali storage tank for temporary storage. A level probe and pH sensor in the neutralization reactor are used to measure the volume and pH value of the acidic wastewater in the chlorobenzene recovery system. After calculation by a host computer, the required amount of alkaline treatment solution to be added is determined. A quantitative alkali injection component extracts the alkaline treatment solution from the intermediate alkali storage tank and adds it to the neutralization reactor. The impact stirring component further agitates the alkaline treatment solution and acidic wastewater, increasing the neutralization reaction rate. The system is comprehensive, requires minimal manual intervention, and has high automation efficiency, enabling automated alkali injection and neutralization of acidic wastewater in a chlorobenzene recovery system. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the main structure of the automatic alkali injection neutralization device of the chlorobenzene recovery system of this utility model.

[0012] Figure 2 This utility model Figure 1 A partially enlarged structural diagram.

[0013] In the diagram: 1. Neutralization reactor; 2. Alkali preparation tank; 3. Concentration sensor; 4. Concentrate storage tank; 5. Metering pump; 6. Pure water pipe; 7. Flow valve; 8. Pulse output turbine flow meter; 9. Alkali intermediate storage tank; 10. pH sensor; 11. Liquid level probe; 12. Impact stirring assembly; 13. Mounting bracket; 14. Injection chamber; 15. Lead screw module; 16. Push rod; 17. Rubber stopper; 18. T-connector; 19. Suction pipe; 20. Injection pipe; 21. Suction check valve; 22. Injection check valve; 23. Annular pipe; 24. Transition pipe; 25. Electromagnetic flow meter; 26. Liquid level sensor. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Example: Refer to the appendix of the instruction manual Figure 1-2As can be seen, this application specifically designs an automatic alkali neutralization device for a chlorobenzene recovery system, including a neutralization reactor 1, an alkali preparation tank 2 installed on one side of the neutralization reactor 1, a concentration sensor 3 installed inside the alkali preparation tank, a concentrate storage tank 4 installed on the top of the alkali preparation tank 2, the concentrate storage tank 4 being connected to the alkali preparation tank 2 via a metering pump 5, a pure water pipe 6 connected to one side of the alkali preparation tank 2, a flow valve 7 and a pulse output turbine flow meter 8 installed on the pure water pipe 6, and an intermediate alkali storage tank 9 connected to the outlet end of the alkali preparation tank 2. A liquid level sensor 26 is installed in the intermediate storage tank 9 to monitor the liquid level changes in the intermediate storage tank 9 in real time. When the liquid level is lower than the set value, a corresponding signal is sent to the host computer. The host computer controls the alkali preparation tank 2 to prepare alkali solution. The intermediate storage tank 9 is connected to the neutralization reactor 1 through a quantitative alkali injection component. The neutralization reactor 1 is equipped with a pH sensor 10 and a liquid level probe 11. Both the neutralization reactor 1 and the alkali preparation tank are equipped with impact stirring components 12. The alkali preparation tank 2 is used to concentrate the alkali solution (such as NaOH). The system is automated for preparing alkaline solution with pure water. The supply of concentrated alkaline solution is controlled by a metering pump 5, while the amount of pure water added is controlled and metered by a flow valve 7 and a pulse-output turbine flow meter 8. This effectively ensures that the concentration of the alkaline solution is uniform and consistent after each preparation. The system also utilizes an impact stirring assembly 12 to accelerate the mixing efficiency of the concentrated alkaline solution and pure water, obtaining the designed concentration of alkaline solution. The alkaline solution is then transferred to an intermediate alkaline storage tank 9 for temporary storage. The neutralization reaction vessel 1 uses a level probe 11 and a pH sensor 10 to monitor the neutralization process. The volume and pH value of the acidic wastewater in the chlorobenzene recovery system within reactor 1 are measured. After calculation by the host computer, the amount of alkaline treatment liquid to be added is obtained. The alkaline treatment liquid in the intermediate alkaline storage tank 9 is quantitatively extracted using the quantitative alkaline injection component and added to the neutralization reactor 1. The alkaline treatment liquid and acidic wastewater are stirred together with the impact stirring component 12 to improve the neutralization reaction rate. The system is complete, with low manual intervention and high automation efficiency, and can realize the automated alkaline injection and neutralization of acidic wastewater in the chlorobenzene recovery system.

[0016] In the specific implementation process, the above-mentioned quantitative alkali injection assembly includes a mounting frame 13, an injection chamber 14, an injection control component, and a three-way liquid guiding component. The injection chamber 14 is located inside the mounting frame 13 and is situated on one side of the intermediate alkali storage tank 9. The injection control component is mounted on the mounting frame 13 with one end extending into the injection chamber 14. The three-way liquid guiding component is located on one end of the injection chamber 14 and is connected to both the intermediate alkali storage tank 9 and the neutralization reaction vessel 1. The injection control component includes a screw module 15, a push rod 16, and a rubber stopper 17. The screw module 15 is mounted on the mounting frame 13. One end of the push rod 16 is connected to the moving end of the screw module 15, and the other end extends into the injection chamber 14. The outer ring of the rubber stopper 17... The rubber stopper 17 is fixedly connected to the push rod 16 via an annular seat and slides to the inner annular surface of the injection chamber 14. The aforementioned three-way liquid guiding component includes a three-way connector 18, a liquid extraction pipe 19, and an injection pipe 20. One end of the three-way connector 18 is connected to the injection chamber 14. One end of the liquid extraction pipe 19 is connected to the three-way connector 18, and the other end is connected to the intermediate alkaline storage tank 9. A one-way valve 21 is installed on the liquid extraction pipe 19, and the conduction direction of the one-way valve 21 points to the side of the three-way connector 18. One end of the injection pipe 20 is connected to the three-way connector 18, and the other end is connected to the neutralization reaction vessel 1. A one-way valve 22 is installed on the injection pipe 20, and the conduction direction of the one-way valve points to the side of the neutralization reaction vessel 1. An annular pipe 23 is installed inside the neutralization reactor 1. Injection ports are evenly distributed on the lower wall of the annular pipe 23. The annular pipe 23 is connected to the injection pipe 20 via a transition pipe 24. An electromagnetic flowmeter 25 is installed on the transition pipe 24. During operation, the host computer automatically calculates the required amount of alkaline treatment solution based on the volume and pH value of the acid washing waste liquid in the neutralization reactor 1 and controls the movement of the screw module 15. When the screw module 15 drives the push rod 16 and piston to move away from the injection chamber 14, the alkaline treatment solution in the intermediate alkaline storage tank 9 is drawn into the injection chamber 14 through the extraction pipe 19 and the one-way valve 21 under negative pressure. After the solution is drawn in, the movement of the screw module 15 is controlled. When the end moves in the opposite direction, the push rod 16 pushes the rubber stopper 17 to inject the alkaline treatment liquid in the injection chamber 14 into the transition pipe 24 through the injection pipe 20 and the injection one-way valve 22, and then sprays it into the neutralization reactor 1 through the annular pipe 23 at the bottom of the transition pipe 24. The volume of the injection chamber 14 is fixed, and the stroke of the lead screw module 15 is precisely adjustable. The two work together to realize the quantitative interval addition of alkaline treatment liquid. In addition, the electromagnetic flowmeter 25 on the transition pipe 24 can further measure the added alkaline treatment liquid to improve the accuracy of dosing control. The pH sensor 10 in the neutralization reactor 1 can monitor the acidity and alkalinity of the reaction liquid in real time. When the pH value of the reaction liquid reaches the set value, the dosing will automatically stop.

[0017] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0018] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic alkali injection neutralization device for a chlorobenzene recovery system, comprising a neutralization reaction vessel, characterized in that, An alkali preparation tank is installed on one side of the neutralization reactor. A concentration sensor is installed inside the alkali preparation tank. A concentrate storage tank is installed on the top of the alkali preparation tank. The concentrate storage tank is connected to the alkali preparation tank via a metering pump. A pure water pipe is connected to one side of the alkali preparation tank. A flow valve and a pulse output turbine flow meter are installed on the pure water pipe. An intermediate alkali storage tank is connected to the outlet of the alkali preparation tank. The intermediate alkali storage tank is connected to the neutralization reactor via a metering alkali injection assembly. A pH sensor and a liquid level probe are installed inside the neutralization reactor. Impact stirring assemblies are installed in both the neutralization reactor and the alkali preparation tank.

2. The automatic alkali injection neutralization device for a chlorobenzene recovery system according to claim 1, characterized in that, The quantitative alkali injection assembly includes a mounting frame, an injection chamber, an injection control component, and a three-way liquid guiding component. The injection chamber is located inside the mounting frame and on one side of the intermediate alkali storage tank. The injection control component is mounted on the mounting frame and one end extends into the injection chamber. The three-way liquid guiding component is located on one end of the injection chamber and is connected to both the intermediate alkali storage tank and the neutralization reaction vessel.

3. The automatic alkali injection neutralization device for a chlorobenzene recovery system according to claim 2, characterized in that, The injection control component includes a lead screw module, a push rod, and a rubber stopper. The lead screw module is mounted on a mounting frame. One end of the push rod is connected to the moving end of the lead screw module, and the other end extends into the injection chamber. The outer ring surface of the rubber stopper slides and seals with the inner ring surface of the injection chamber. The rubber stopper is fixedly connected to the push rod through an annular seat.

4. The automatic alkali injection neutralization device for a chlorobenzene recovery system according to claim 2, characterized in that, The three-way liquid guiding component includes a three-way connector, a liquid extraction pipe, and a liquid injection pipe. One end of the three-way connector is connected to the liquid injection chamber. One end of the liquid extraction pipe is connected to the three-way connector, and the other end is connected to the intermediate alkaline storage tank. A one-way liquid extraction valve is installed on the liquid extraction pipe, and the conduction direction of the one-way liquid extraction valve is towards the side of the three-way connector. One end of the liquid injection pipe is connected to the three-way connector, and the other end is connected to the neutralization reaction vessel. A one-way liquid injection valve is installed on the liquid injection pipe, and the conduction direction of the one-way liquid injection valve is towards the side of the neutralization reaction vessel.

5. The automatic alkali injection neutralization device for a chlorobenzene recovery system according to claim 4, characterized in that, The neutralization reactor is equipped with an annular tube, and injection ports are evenly distributed on the lower side wall of the annular tube. The annular tube and the injection tube are connected by a transition tube, and an electromagnetic flow meter is installed on the transition tube.

6. The automatic alkali injection neutralization device for a chlorobenzene recovery system according to claim 1, characterized in that, A liquid level sensor is installed inside the intermediate alkaline storage tank.

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