A system and method for resource recovery of wastewater in a sar device

Abstract

The present application relates to wastewater treatment technical field, disclose a kind of resource utilization system and method of neutralization of wastewater in SAR device, the system includes water quality analysis module, wastewater transport module, injection control module, mixed neutralization module and balance adjustment module, the water quality analysis of acidic wastewater in the operation process of SAR device is carried out, and key physical property parameter is obtained;Make acidic wastewater as the supplementary water source of AN device quenching tower;Through the control of regulating valve and flowmeter, the injection amount of acidic wastewater is accurately regulated;The injected acidic wastewater and the ammonia-containing circulating liquid in the AN device quenching tower are forced turbulent mixed in mixer, and the excess ammonia in ammonia-containing circulating liquid is neutralized using sulfuric acid component, to generate ammonium sulfate neutralization water;The acid-base value and temperature of AN device quenching tower are monitored in real time, and the delivery amount of acidic wastewater is adjusted according to the monitoring result, to maintain the water balance and acid-base balance of the circulating liquid containing ammonium sulfate neutralization water;The present application can improve the efficiency of resource utilization.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and in particular to a system and method for the resource utilization of wastewater neutralized by a SAR device. Background Technology

[0002] Currently, existing technologies for the utilization of wastewater by SAR devices have significant shortcomings in the three major stages of pretreatment and transportation, mixing and neutralization, and balance control, resulting in low wastewater utilization efficiency and poor system operation stability.

[0003] For example, the lack of systematic analysis of key parameters such as pH, sulfuric acid composition, and temperature of acidic wastewater leads to a lack of precise basis for reuse; the absence of corrosion-resistant dedicated pipelines makes highly corrosive wastewater prone to leakage, corrosion, and flow control failure; relying solely on natural mixing results in uneven contact between acidic wastewater and ammonia-containing circulating liquid, insufficient neutralization reaction, and low sulfuric acid utilization; the lack of a linkage feedback mechanism between ammonia content, pH, and temperature makes precise quantity control impossible, making it difficult to maintain water and acid-base balance, resulting in low ammonium sulfate generation efficiency and poor resource utilization.

[0004] Therefore, existing technologies cannot achieve stable transport, efficient neutralization, and dynamic balance operation across devices. There is an urgent need to realize the efficient resource utilization of SAR acidic wastewater to the AN device quench tower through multi-dimensional water quality analysis, corrosion-resistant transport, forced turbulent mixing, and feedforward and feedback dual closed-loop control. Summary of the Invention

[0005] This invention provides a system and method for the resource utilization of wastewater neutralized by a SAR device, in order to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides a resource utilization system for neutralized wastewater using a SAR device, characterized in that the system includes a water quality analysis module, a wastewater transport module, an injection control module, a mixing and neutralization module, and a balance adjustment module, wherein:

[0007] The water quality analysis module is used to analyze the acidic wastewater generated during the operation of the SAR device and obtain the key physical property parameters of the acidic wastewater.

[0008] The wastewater conveying module is used to convey the acidic wastewater through a corrosion-resistant conveying pipeline to the inlet pipeline of the circulating pump of the AN unit quench tower, so that the acidic wastewater serves as a supplementary water source for the AN unit quench tower.

[0009] The injection control module is used to precisely regulate the injection volume of acidic wastewater based on the key physical property parameters and the ammonia content monitored in real time in the quench tower of the AN device, through the linkage control of the regulating valve and the flow meter to form a feedforward control loop.

[0010] The mixing and neutralization module is used to force turbulent mixing of the injected acidic wastewater and the ammonia-containing circulating liquid in the AN unit's quench tower within the mixer, and to neutralize the excess ammonia in the ammonia-containing circulating liquid using the sulfuric acid component in the acidic wastewater, thereby generating ammonium sulfate neutralized water for the acidic wastewater.

[0011] The balance adjustment module is used to monitor the pH value and temperature of the AN unit quench tower in real time. Based on the monitoring results, it forms a feedback control loop and negatively adjusts the delivery rate of the acidic wastewater to maintain the water balance and pH balance of the circulating liquid containing the ammonium sulfate neutralized water in the AN unit quench tower.

[0012] In a preferred embodiment, when the water quality analysis module performs water quality analysis on the acidic wastewater generated during the operation of the SAR device to obtain the key physical property parameters of the acidic wastewater, it is specifically used for:

[0013] Collect acidic wastewater from the outlet of the circulating pump of the SAR device's quencher;

[0014] The acidic wastewater is subjected to pH testing to obtain pH data.

[0015] The acidic wastewater was subjected to ion chromatography analysis to determine the content of sulfuric acid components in the acidic wastewater;

[0016] The real-time temperature of the acidic wastewater at the outlet of the SAR device's quencher is monitored to obtain the temperature data of the acidic wastewater.

[0017] By integrating the pH data, the component content, and the temperature data, the key physical properties of the acidic wastewater are obtained.

[0018] In a preferred embodiment, when the wastewater conveying module conveys the acidic wastewater through a corrosion-resistant pipeline to the inlet pipeline of the circulating pump of the AN unit's quench tower, so that the acidic wastewater serves as a makeup water source for the AN unit's quench tower, it is specifically used for:

[0019] Start the delivery pump installed at the beginning of the corrosion-resistant delivery pipeline;

[0020] The acidic wastewater is drawn from the storage tank of the SAR device quencher and introduced into a corrosion-resistant pipeline lined with polytetrafluoroethylene.

[0021] The acidic wastewater is guided to flow along the corrosion-resistant conveying pipeline, passing through corrosion-resistant valves and flow meters on the pipeline, so as to regulate and monitor the conveying status of the acidic wastewater.

[0022] The acidic wastewater flowing through the corrosion-resistant valve and the flow meter is transported to the inlet pipeline of the circulating pump of the AN unit quench tower, so that the acidic wastewater serves as a supplementary water source for the AN unit quench tower.

[0023] In a preferred embodiment, when the injection control module executes a feedforward control loop based on the key physical property parameters and the ammonia content monitored in real time within the AN unit's quench tower, and precisely regulates the injection volume of the acidic wastewater through the linkage control of the regulating valve and the flow meter to form a control loop, it is specifically used for:

[0024] Obtain the ammonia content in the quench tower of the AN device in real time;

[0025] The key physical property parameters and the ammonia content are input into the controller connected to the regulating valve and the flow meter;

[0026] In the controller, a regulating valve opening command corresponding to the current ammonia content is generated based on the key physical property parameters and the ammonia content.

[0027] The control valve opening command is output to the control valve on the corrosion-resistant delivery pipeline to drive the control valve to adjust its opening.

[0028] The flow meter collects the adjusted acidic wastewater flow rate in real time and feeds the acidic wastewater flow rate back to the controller.

[0029] The controller compares the acidic wastewater flow rate with a preset target flow rate range and adjusts the opening of the regulating valve according to the comparison result until the acidic wastewater flow rate stabilizes within the preset target flow rate range.

[0030] In a preferred embodiment, the injection control module, when correcting the opening of the regulating valve based on the comparison results until the acidic wastewater flow rate stabilizes within the preset target flow rate range, specifically performs the following:

[0031] The acidic wastewater flow rate value is compared with the preset target flow rate range;

[0032] When the flow rate of the acidic wastewater is within the preset target flow rate range, a signal is generated to maintain the current opening of the regulating valve, so as to drive the regulating valve to keep the existing opening unchanged;

[0033] When the flow rate of the acidic wastewater is lower than the lower limit of the preset target flow range, a positive adjustment signal is generated for the regulating valve to drive the regulating valve to increase its opening.

[0034] When the flow rate of the acidic wastewater is higher than the upper limit of the preset target flow range, a negative adjustment signal is generated for the regulating valve to drive the regulating valve to reduce its opening.

[0035] In a preferred embodiment, the mixing and neutralization module, when performing forced turbulent mixing of the injected acidic wastewater with the ammonia-containing circulating liquid in the AN unit's quench tower within the mixer, specifically serves to:

[0036] Open the injection valve located at the end of the corrosion-resistant delivery pipeline and at the front end of the mixer inlet to allow the precisely regulated acidic wastewater to enter the first inlet of the mixer;

[0037] Simultaneously, ammonia-containing circulating liquid is drawn from the outlet pipeline of the circulating pump of the AN unit's quench tower and introduced into the second inlet of the mixer;

[0038] The acidic wastewater and the ammonia-containing circulating liquid entering the mixer are transported to the spiral guide vane area inside the mixer. The spiral guide vane has a spiral angle of 30°-45° and a number of 4-6 blades.

[0039] In the region of the spiral guide vanes, the acidic wastewater and the ammonia-containing circulating liquid flowing in parallel are cut, rotated and overturned to generate a uniformly mixed fluid, and the uniformly mixed fluid is discharged from the outlet of the mixer.

[0040] In a preferred embodiment, when the mixing and neutralization module neutralizes excess ammonia in the ammonia-containing circulating liquid using the sulfuric acid component in the acidic wastewater to generate ammonium sulfate neutralized water for the acidic wastewater, it is specifically used for:

[0041] The uniformly mixed fluid discharged from the mixer is introduced into the circulating liquid body of the AN unit quench tower, so that the uniformly mixed fluid is dispersed in the ammonia-containing circulating liquid;

[0042] Within the main body of the circulating liquid, the sulfuric acid component carried in the mixed fluid undergoes an acid-base neutralization reaction with excess ammonia molecules dissolved in the ammonia-containing circulating liquid to generate neutralized water containing ammonium sulfate.

[0043] The ammonium sulfate salt is dissolved in the ammonia-containing circulating liquid to generate ammonium sulfate neutralized water containing the acidic wastewater.

[0044] In a preferred embodiment, the mixing and neutralization module, when performing an acid-base neutralization reaction between the sulfuric acid component carried in the mixed fluid and excess ammonia molecules dissolved in the ammonia-containing circulating liquid to generate neutralized water containing ammonium sulfate, is specifically used for:

[0045] The mixed fluid discharged from the mixer is introduced into the main body of the circulating liquid of the AN unit quench tower, so that the sulfuric acid component carried by the mixed fluid is uniformly dispersed in the ammonia-containing circulating liquid;

[0046] The continuous circulation of the ammonia-containing circulating liquid in the AN device quench tower drives the dispersed sulfuric acid components to ionize hydrogen ions, and at the same time drives the excess ammonia molecules dissolved in the ammonia-containing circulating liquid to ionize hydroxide ions.

[0047] During the circulation of the ammonia-containing circulating liquid, the ionized hydrogen ions collide and combine with the hydroxide ions, while the sulfate ions in the sulfuric acid component associate with the ammonium ions in the excess ammonia molecules to generate neutralized water containing ammonium sulfate.

[0048] In a preferred embodiment, the balance adjustment module, while performing real-time monitoring of the pH and temperature of the AN unit's quench tower, and constructing a feedback control loop based on the monitoring results to negatively adjust the flow rate of the acidic wastewater to maintain the water balance and pH balance of the circulating liquid containing the ammonium sulfate neutralized water in the AN unit's quench tower, is specifically used for:

[0049] The real-time pH value and temperature of the circulating liquid are collected in real time by an online pH value monitor and temperature sensor installed in the quench tower of the AN device.

[0050] The real-time pH value is compared with a preset target pH value range to generate the pH deviation signal of the AN device quench tower;

[0051] The collected real-time temperature is compared with the preset target temperature range to generate a temperature deviation signal for the AN device's quench tower.

[0052] The acid-base deviation signal and the temperature deviation signal are transmitted to the controller to generate a comprehensive adjustment command for the AN device quench tower;

[0053] The integrated adjustment command is output to the regulating valve on the corrosion-resistant delivery pipeline to drive the regulating valve to adjust the valve opening, thereby adjusting the delivery volume of the acidic wastewater.

[0054] By adjusting the acidic wastewater flow rate, the pH value of the circulating liquid in the AN unit's quench tower is brought back to the preset target pH value range, and the temperature of the circulating liquid is brought back to the preset target temperature range, so as to maintain the water balance and acid-base balance of the AN unit's quench tower.

[0055] To address the above problems, the present invention also provides a method for the resource utilization of wastewater from a SAR device, the method comprising:

[0056] S1. Perform water quality analysis on the acidic wastewater generated during the operation of the SAR device to obtain the key physical property parameters of the acidic wastewater;

[0057] S2. The acidic wastewater is transported to the inlet pipeline of the circulating pump of the AN unit quench tower through a corrosion-resistant pipeline, so that the acidic wastewater serves as a supplementary water source for the AN unit quench tower.

[0058] S3. Based on the key physical property parameters and the ammonia content monitored in real time in the quench tower of the AN device, a feedforward control loop is formed by the linkage control of the regulating valve and the flow meter to accurately regulate the injection volume of the acidic wastewater.

[0059] S4. The injected acidic wastewater and the ammonia-containing circulating liquid in the AN device quench tower are subjected to forced turbulent mixing in a mixer, and the sulfuric acid component in the acidic wastewater is used to neutralize the excess ammonia in the ammonia-containing circulating liquid to generate ammonium sulfate neutralized water of the acidic wastewater.

[0060] S5. Monitor the pH and temperature of the AN device quench tower in real time, and form a feedback control loop based on the monitoring results. Adjust the delivery rate of the acidic wastewater through negative feedback to maintain the water balance and acid-base balance of the circulating liquid containing the ammonium sulfate neutralized water in the AN device quench tower.

[0061] Compared with existing technologies, this invention has the following advantages: Through precise pretreatment and efficient transportation, this invention lays a solid foundation for the resource utilization of neutralized wastewater from SAR devices. Multi-dimensional water quality analysis of acidic wastewater integrates data on pH, sulfuric acid content, and temperature to form key physical property parameters, providing a precise basis for subsequent utilization. The use of corrosion-resistant transportation pipelines lined with polytetrafluoroethylene, coupled with control and monitoring components, achieves stable transportation of wastewater to the AN device's quench tower, solving the transportation problem caused by the highly corrosive nature of acidic wastewater from SAR devices. Simultaneously, the injection volume is controlled based on the linkage between physical property parameters and ammonia content, ensuring precise and controllable wastewater injection.

[0062] This invention significantly improves the efficiency and stability of wastewater resource utilization through efficient neutralization and dynamic balance regulation. Forced turbulent mixing of acidic wastewater and ammonia-containing circulating liquid is achieved through spiral guide vanes within the mixer, promoting the full reaction of sulfuric acid components and excess ammonia to generate ammonium sulfate neutralized water. Real-time monitoring of the quench tower's pH and temperature, along with feedback adjustment of the wastewater delivery rate, forms a "feedforward + feedback" dual closed-loop control system. This maintains the water and acid-base balance of the circulating liquid, directionally generating ammonium sulfate products, achieving efficient resource conversion and stable operation of waste acid, and improving resource recovery and utilization rates.

[0063] This invention transports acidic wastewater from the SAR unit across units to the quench tower of the AN unit for resource utilization. It overcomes the technical obstacles of large differences in wastewater properties, strong corrosiveness, and uneven mixing between different chemical units. Through the synergistic effect of multiple technical features such as water quality analysis, corrosion-resistant design, forced turbulent mixing, and dual closed-loop control, it achieves an integrated effect of "stable transportation - efficient neutralization - ammonium sulfate generation - system balance", which is significantly better than the existing technical solution of simply reusing wastewater within a single unit. Attached Figure Description

[0064] Figure 1 This is a system architecture diagram of a wastewater resource utilization system provided by an embodiment of the present invention;

[0065] Figure 2 This is a schematic flowchart illustrating a method for the resource utilization of wastewater from a SAR device, as provided in an embodiment of the present invention.

[0066] Figure 3 A schematic diagram of the quench tower balance adjustment principle for a method of resource utilization of wastewater neutralized by a SAR device, provided in an embodiment of the present invention;

[0067] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0068] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments belong to some, but not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0069] The terminology used in the embodiments of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. The singular forms “said” and “the” as used in the embodiments of this invention and the appended claims are also intended to include the plural forms, and “multiple” generally includes at least two unless the context clearly indicates otherwise.

[0070] Depending on the context, the word "if" or "if" as used here can be interpreted as "when," "when," "in response to determination," or "in response to detection." Similarly, depending on the context, the phrase "if determination" or "if detection (of the stated condition or event)" can be interpreted as "when determination," "in response to determination," "when detection (of the stated condition or event)," or "in response to detection (of the stated condition or event)."

[0071] Furthermore, the timing of the steps in the following method embodiments is merely an example and not a strict limitation.

[0072] In practice, the server-side equipment deployed in a SAR device-based wastewater resource utilization system may consist of one or more devices. This SAR device-based wastewater resource utilization system can be implemented as: a service instance, a virtual machine, or hardware devices. For example, it can be implemented as a service instance deployed on one or more devices in a cloud node. Simply put, it can be understood as software deployed on a cloud node, providing a SAR device-based wastewater resource utilization system to various user terminals. Alternatively, it can be implemented as a virtual machine deployed on one or more devices in a cloud node, with application software installed to manage various user terminals. Or, it can also be implemented as a server composed of numerous identical or different types of hardware devices, with one or more hardware devices configured to provide a SAR device-based wastewater resource utilization system to various user terminals.

[0073] In terms of implementation, a SAR device-based wastewater resource utilization system and a user terminal are mutually compatible. Specifically, if the SAR device-based wastewater resource utilization system is implemented as an application installed on a cloud service platform, the user terminal acts as a client establishing a communication connection with that application; or if the SAR device-based wastewater resource utilization system is implemented as a website, the user terminal acts as a webpage; or if the SAR device-based wastewater resource utilization system is implemented as a cloud service platform, the user terminal acts as a mini-program within an instant messaging application.

[0074] like Figure 1 The figure shown is a system architecture diagram of a SAR device for the resource utilization of wastewater provided in an embodiment of the present invention.

[0075] The SAR device-based wastewater resource utilization system described in this invention can be installed on a cloud server. In terms of implementation, it can function as one or more service devices, or as an application installed in the cloud (e.g., a mobile service operator's server, server cluster, etc.), or it can be developed into a website. Depending on the functions implemented, the SAR device-based wastewater resource utilization system may include a water quality analysis module, a wastewater transport module, an injection control module, a mixing and neutralization module, and a balance adjustment module. The module described in this invention can also be called a unit, referring to a series of computer program segments that can be executed by an electronic device's processor and perform a fixed function, stored in the electronic device's memory.

[0076] In this embodiment of the invention, in a SAR device-based wastewater resource utilization system, each of the above-mentioned modules can be implemented independently and can be invoked by other modules. Invocation here can be understood as a module connecting to multiple modules of another type and providing corresponding services to those connected modules. In the SAR device-based wastewater resource utilization system provided by this embodiment of the invention, the applicable scope of the system architecture can be adjusted by adding modules and directly invoking them without modifying the program code, achieving cluster-based horizontal expansion to quickly and flexibly expand the SAR device-based wastewater resource utilization system. In practical applications, the above modules can be set in the same device or different devices, or they can be set in a virtual device, such as a service instance in a cloud server.

[0077] The following describes, with reference to specific embodiments, the various components and specific workflows of a SAR device and wastewater resource utilization system:

[0078] The water quality analysis module is used to analyze the acidic wastewater generated during the operation of the SAR device and obtain the key physical property parameters of the acidic wastewater.

[0079] In this embodiment of the invention, when the water quality analysis module performs water quality analysis on the acidic wastewater generated during the operation of the SAR device to obtain the key physical property parameters of the acidic wastewater, it is specifically used for:

[0080] Collect acidic wastewater from the outlet of the circulating pump of the SAR device's quencher;

[0081] The acidic wastewater is subjected to pH testing to obtain pH data.

[0082] The acidic wastewater was subjected to ion chromatography analysis to determine the content of sulfuric acid components in the acidic wastewater;

[0083] The real-time temperature of the acidic wastewater at the outlet of the SAR device's quencher is monitored to obtain the temperature data of the acidic wastewater.

[0084] By integrating the pH data, the component content, and the temperature data, the key physical properties of the acidic wastewater are obtained.

[0085] During the production and operation of the SAR device, acidic wastewater is collected at the outlet of the quencher circulating pump. The collected acidic wastewater is the neutralized wastewater generated during the production of the SAR device, which comes directly from the delivery pipeline at the outlet of the quencher circulating pump. The collection process ensures the representativeness and authenticity of the water sample, and ensures that the water sample can fully reflect the actual water quality status of the acidic wastewater at that location.

[0086] The acidic wastewater samples were tested using a dedicated pH testing method for water quality analysis. The detection probe was brought into full contact with the acidic wastewater, and the detection system sensed the hydrogen ion concentration in the acidic wastewater and converted it into corresponding detection data. This yielded pH data that reflects the acidity or alkalinity of the acidic wastewater. This data is directly derived from the pH test results of the acidic wastewater and truly reflects its acid-base characteristics.

[0087] A certain amount of acidic wastewater was taken as a test sample and analyzed by ion chromatography. Various ions in the acidic wastewater were separated by the chromatographic column of the ion chromatograph, and the separated sulfate ions were qualitatively and quantitatively analyzed by the detector. The content of sulfuric acid components in the acidic wastewater was determined based on the test results. The content of these components is directly derived from the ion chromatography analysis results of the acidic wastewater, accurately reflecting the actual content of sulfuric acid in the wastewater.

[0088] Temperature monitoring equipment is installed at the outlet of the SAR unit's quench cooler, allowing the monitoring equipment to directly contact the transport medium of acidic wastewater. The equipment senses the temperature change of the acidic wastewater at this location in real time and records the monitoring values ​​synchronously, thereby obtaining the temperature data of the acidic wastewater. This data is directly derived from the real-time temperature monitoring results of the acidic wastewater at the outlet of the quench cooler, reflecting the actual temperature state of the acidic wastewater at this process node.

[0089] The acid-base data obtained from pH testing, the sulfuric acid content obtained from ion chromatography analysis, and the temperature data obtained from temperature monitoring are systematically integrated. The three types of data are summarized into a unified set of physical property parameters according to the standard requirements of water quality analysis. All types of data retain the original detection and monitoring results. In this way, key physical property parameters that can comprehensively reflect the water quality characteristics of acidic wastewater are obtained. All data of these key physical property parameters come from the integration of the aforementioned three types of detection and monitoring results, and fully reflect the core physical property characteristics of acidic wastewater such as pH, sulfuric acid content, and temperature.

[0090] The beneficial effects are: fixed-point water sampling ensures that the water samples can truly reflect the actual water quality of the wastewater, laying a reliable foundation for analysis; multi-dimensional detection and analysis accurately obtain core data such as pH, sulfuric acid content, and temperature, with comprehensive indicator coverage.

[0091] By integrating key physical property parameters, precise data can be provided for subsequent wastewater injection control and efficient neutralization reactions, thereby improving process adaptability.

[0092] The wastewater conveying module is used to convey the acidic wastewater through a corrosion-resistant conveying pipeline to the inlet pipeline of the circulating pump of the AN unit quench tower, so that the acidic wastewater serves as a supplementary water source for the AN unit quench tower.

[0093] In this embodiment of the invention, when the wastewater conveying module conveys the acidic wastewater through a corrosion-resistant conveying pipeline to the inlet pipeline of the circulating pump of the AN unit's quench tower, so that the acidic wastewater serves as a makeup water source for the AN unit's quench tower, it is specifically used for:

[0094] Start the delivery pump installed at the beginning of the corrosion-resistant delivery pipeline;

[0095] The acidic wastewater is drawn from the storage tank of the SAR device quencher and introduced into a corrosion-resistant pipeline lined with polytetrafluoroethylene.

[0096] The acidic wastewater is guided to flow along the corrosion-resistant conveying pipeline, passing through corrosion-resistant valves and flow meters on the pipeline, so as to regulate and monitor the conveying status of the acidic wastewater.

[0097] The acidic wastewater flowing through the corrosion-resistant valve and the flow meter is transported to the inlet pipeline of the circulating pump of the AN unit quench tower, so that the acidic wastewater serves as a supplementary water source for the AN unit quench tower.

[0098] The transfer pump installed at the beginning of the corrosion-resistant transfer pipeline is started by control commands. This transfer pump provides continuous and stable power for the transfer of acidic wastewater. The start signal of the transfer pump directly acts on the power drive system of the pump body, so that the pump body starts to work according to the preset operating state, providing power support for the entire transfer of acidic wastewater. The operating state of the transfer pump directly determines the power supply for the transfer of acidic wastewater.

[0099] The acidic wastewater stored in the quench tank of the SAR device is drawn out of the storage tank by a transfer pump. This acidic wastewater is the neutralized wastewater generated during the production process of the SAR device and comes directly from the wastewater medium collected and stored in the storage tank. The drawn-out acidic wastewater is directly introduced into a corrosion-resistant pipeline lined with polytetrafluoroethylene that has been laid in advance. The lining material of the pipeline can withstand the strong corrosive properties of the acidic wastewater, ensuring that the pipeline is not corroded or damaged during the wastewater transportation process.

[0100] Powered by a transfer pump, acidic wastewater is directed to flow along a corrosion-resistant pipeline lined with polytetrafluoroethylene. The flow direction of the acidic wastewater within the pipeline is always towards the quench tower of the AN unit. During the flow, the wastewater passes sequentially through corrosion-resistant valves and flow meters pre-installed on the pipeline. The corrosion-resistant valves precisely regulate the flow rate of the acidic wastewater by adjusting the valve opening, while the flow meters continuously monitor the real-time flow rate of the acidic wastewater within the pipeline. Together, they achieve the regulation and monitoring of the acidic wastewater's transport status. All data from the regulation and monitoring are derived from the actual flow status of the acidic wastewater within the pipeline.

[0101] After the acidic wastewater has passed through corrosion-resistant valves to regulate its flow rate and flow meters to monitor its flow rate, it continues to be transported along corrosion-resistant pipelines. Finally, the acidic wastewater is precisely delivered to the inlet pipeline of the circulating pump of the AN unit's quench tower. The acidic wastewater directly enters the circulating water system of the AN unit's quench tower, replacing the fresh water that originally needed to be replenished. It directly serves as the supplementary water source for the AN unit's quench tower, providing support for the system water balance of the AN unit's quench tower. At the same time, the acidic components in the acidic wastewater neutralize the excess ammonia in the quench tower, realizing the resource utilization of the acidic wastewater.

[0102] The beneficial effects are that the use of corrosion-resistant pipelines lined with polytetrafluoroethylene is suitable for the corrosive characteristics of acidic wastewater, and avoids leakage and corrosion problems during transportation from a hardware perspective, thus ensuring the safety and stability of wastewater transportation.

[0103] The pipeline is equipped with a transfer pump, corrosion-resistant valves, and flow meters to form a complete transportation system of "power supply + flow regulation + real-time monitoring". It can control the wastewater transportation status throughout the process, prevent flow loss, and achieve controllable wastewater transportation.

[0104] Acidic wastewater is precisely delivered to the inlet pipeline of the circulating pump of the quench tower in the AN unit, and directly used as a supplementary water source for the quench tower to replace fresh water. This not only meets the water balance requirements of the quench tower, but also realizes the resource reuse of acidic wastewater and reduces water consumption.

[0105] The entire conveying process forms a standardized process path, realizing the efficient and directional conveying of acidic wastewater from the SAR unit to the quench tower of the AN unit, laying a stable material conveying foundation for the subsequent neutralization reaction of wastewater and ammonia-containing circulating liquid.

[0106] The injection control module is used to precisely regulate the injection volume of acidic wastewater based on the key physical property parameters and the ammonia content monitored in real time in the quench tower of the AN device, through the linkage control of the regulating valve and the flow meter to form a feedforward control loop.

[0107] In this embodiment of the invention, when the injection control module executes a feedforward control loop based on the key physical property parameters and the ammonia content monitored in real time within the AN device's quench tower, and precisely regulates the injection volume of the acidic wastewater through the linkage control of the regulating valve and the flow meter to form a control loop, it is specifically used for:

[0108] Obtain the ammonia content in the quench tower of the AN device in real time;

[0109] The key physical property parameters and the ammonia content are input into the controller connected to the regulating valve and the flow meter;

[0110] In the controller, a regulating valve opening command corresponding to the current ammonia content is generated based on the key physical property parameters and the ammonia content.

[0111] The control valve opening command is output to the control valve on the corrosion-resistant delivery pipeline to drive the control valve to adjust its opening.

[0112] The flow meter collects the adjusted acidic wastewater flow rate in real time and feeds the acidic wastewater flow rate back to the controller.

[0113] The controller compares the acidic wastewater flow rate with a preset target flow rate range and adjusts the opening of the regulating valve according to the comparison result until the acidic wastewater flow rate stabilizes within the preset target flow rate range.

[0114] The injection control module, when correcting the opening of the regulating valve based on the comparison results until the acidic wastewater flow rate stabilizes within the preset target flow range, specifically performs the following functions:

[0115] The acidic wastewater flow rate value is compared with the preset target flow rate range;

[0116] When the flow rate of the acidic wastewater is within the preset target flow rate range, a signal is generated to maintain the current opening of the regulating valve, so as to drive the regulating valve to keep the existing opening unchanged;

[0117] When the flow rate of the acidic wastewater is lower than the lower limit of the preset target flow range, a positive adjustment signal is generated for the regulating valve to drive the regulating valve to increase its opening.

[0118] When the flow rate of the acidic wastewater is higher than the upper limit of the preset target flow range, a negative adjustment signal is generated for the regulating valve to drive the regulating valve to reduce its opening.

[0119] The ammonia content is extracted from the online monitoring equipment inside the quench tower of the AN unit. This ammonia content is the actual excess ammonia content in the reaction system inside the quench tower. It comes directly from the real-time detection results of the medium inside the tower by the dedicated monitoring equipment inside the quench tower, and truly reflects the dynamic change of ammonia content inside the quench tower.

[0120] The key physical property parameters of acidic wastewater obtained from the water quality analysis module and the ammonia content obtained from the monitoring equipment are processed together. The two types of data are synchronously input into the controller that has been electrically connected to the regulating valve and flow meter. The key physical property parameters are directly derived from the water quality analysis results of the acidic wastewater. The controller, as the core of data processing and command issuance, receives all raw detection data that reflect the actual state of the process.

[0121] The controller performs a comprehensive analysis of the received key physical properties and ammonia content, and, in conjunction with the neutralization reaction requirements of acidic components and ammonia in the acidic wastewater, determines the acidic wastewater delivery flow rate that matches the current ammonia content. Then, it converts this flow rate into control information for the regulating valve opening, thereby generating a regulating valve opening command corresponding to the current ammonia content. This opening command is generated entirely based on the actual process parameters and reaction requirements, and directly directs the regulating valve opening adjustment operation.

[0122] The controller generates a control valve opening command, which is sent to the control valve installed on the corrosion-resistant delivery pipeline through an electrical connection transmission path. After receiving the opening command, the control valve activates its internal drive structure and changes the opening degree of the valve port according to the command requirements, thereby completing the adjustment of the control valve opening. The execution of the opening adjustment action is entirely based on the opening command output by the controller, directly changing the delivery diameter of acidic wastewater in the pipeline.

[0123] After the regulating valve completes the opening adjustment, the flow meter installed on the corrosion-resistant delivery pipeline is used to detect the flow of acidic wastewater in the pipeline in real time. The flow meter obtains real-time flow data by contact sensing with the acidic wastewater, thereby collecting the adjusted acidic wastewater flow value, and feeding the flow value back to the controller in real time through electrical connection. The feedback flow value is the direct detection result of the flow meter on the actual delivery status of the acidic wastewater.

[0124] After receiving the acidic wastewater flow rate value from the flow meter, the controller compares the real-time flow rate value with a preset target flow rate range. This preset target flow rate range is a reasonable flow range determined based on the neutralization reaction requirements and system water balance requirements. If the real-time flow rate value exceeds this range, the controller generates a new opening adjustment signal based on the deviation in the comparison, and precisely corrects the opening of the regulating valve. This correction operation continues until the acidic wastewater flow rate value fed back by the flow meter is stable within the preset target flow rate range. The comparison and correction data throughout the process are all derived from the real-time detected flow rate value and the preset target flow rate range.

[0125] The controller retrieves the real-time acidic wastewater flow rate from the flow meter and simultaneously retrieves the internally stored preset target flow range. It then performs a comprehensive numerical comparison between the real-time flow rate and the preset target flow range to determine the specific position of the real-time flow rate within the preset target flow range. The acidic wastewater flow rate directly originates from the flow meter's real-time detection results of the acidic wastewater in the corrosion-resistant pipeline. The preset target flow range is pre-set based on the neutralization reaction requirements of the AN unit's quench tower and the system's water balance requirements. All the compared data are valid data reflecting the actual operating status of the process.

[0126] When the controller completes the comparison and determines that the acidic wastewater flow rate is within the preset target flow range, the controller generates a signal to maintain the current opening of the regulating valve based on the comparison result. This signal is directly transmitted to the regulating valve on the corrosion-resistant delivery pipeline. After receiving the signal, the regulating valve controls its internal drive structure to remain stationary, thereby driving the regulating valve to maintain the existing valve opening without any change, ensuring that the acidic wastewater delivery flow rate is always stable within the preset target flow range, and meeting the process operation requirements of the AN unit's quench tower.

[0127] When the controller completes the comparison and determines that the acidic wastewater flow rate is lower than the lower limit of the preset target flow rate range, the controller generates a positive adjustment signal for the regulating valve based on the comparison result. This signal carries a control command to increase the opening degree and is transmitted to the regulating valve on the corrosion-resistant delivery pipeline. After receiving the signal, the regulating valve activates its internal drive structure to drive the valve port components to move, thereby driving the regulating valve to gradually increase the opening degree of the valve port, expand the delivery diameter of the acidic wastewater in the pipeline, and increase the delivery flow rate of the acidic wastewater until the flow rate returns to the preset target flow rate range.

[0128] When the controller completes the comparison and determines that the acidic wastewater flow rate is higher than the upper limit of the preset target flow rate range, the controller generates a negative adjustment signal for the regulating valve based on the comparison result. This signal carries a control command to reduce the opening degree and is transmitted to the regulating valve on the corrosion-resistant delivery pipeline. After receiving the signal, the regulating valve activates its internal drive structure to drive the valve port components to move, thereby driving the regulating valve to gradually reduce the opening degree of the valve port, reduce the delivery diameter of the acidic wastewater in the pipeline, and reduce the delivery flow rate of the acidic wastewater until the flow rate drops back to the preset target flow rate range.

[0129] The beneficial effect is that, based on the dual data control of key physical parameters of wastewater and real-time ammonia content of quench tower, the amount of acidic wastewater injected can be precisely matched with the neutralization reaction requirements, avoiding insufficient neutralization or waste of resources due to excessive or insufficient amounts, and improving the reaction matching degree.

[0130] It achieves closed-loop control of the regulating valve and flow meter, with real-time feedback of flow data to correct valve opening, ensuring that the acidic wastewater flow rate is stable within the preset range, guaranteeing the accuracy and stability of the injection volume, and preventing flow control problems.

[0131] The controller serves as the core, enabling automatic data analysis, command generation, and opening correction without any manual intervention. This enhances the automation level of injection control, reduces human error, and adapts to the needs of continuous industrial production.

[0132] Precise injection volume control provides a stable material base for subsequent mixing and neutralization, avoids the decrease in neutralization reaction efficiency caused by fluctuations in wastewater injection, ensures the smooth and efficient progress of ammonium sulfate generation reaction, and improves the overall resource utilization efficiency.

[0133] Establish a precise comparison mechanism between flow rate and preset range, generate targeted adjustment signals based on the direction of flow deviation, and achieve refined and directional control of valve opening to ensure that the injection volume of acidic wastewater always meets process requirements.

[0134] Differentiated control strategies are adopted for different flow deviations to avoid the lag and error of a single control method, quickly correct the wastewater flow to the preset range, and improve the response speed and accuracy of flow control.

[0135] It enables automatic maintenance and dynamic correction of the valve opening without manual intervention, reducing human error and ensuring a continuous and stable injection volume of acidic wastewater, thus meeting the process requirements of continuous industrial production.

[0136] A stable wastewater flow rate provides a constant material input for the subsequent mixing and neutralization process, avoiding problems such as incomplete neutralization reaction and low utilization rate of sulfuric acid components caused by flow fluctuations, and ensuring the stable and efficient operation of the resource utilization process.

[0137] Precise opening correction can effectively control the amount of acidic wastewater injected, avoiding resource waste caused by excessive injection or incomplete ammonia neutralization caused by insufficient injection, thereby improving resource utilization efficiency and process treatment effect.

[0138] The mixing and neutralization module is used to force turbulent mixing of the injected acidic wastewater and the ammonia-containing circulating liquid in the AN unit's quench tower within the mixer, and to neutralize the excess ammonia in the ammonia-containing circulating liquid using the sulfuric acid component in the acidic wastewater, thereby generating ammonium sulfate neutralized water for the acidic wastewater.

[0139] In this embodiment of the invention, when the mixing and neutralization module performs forced turbulent mixing of the injected acidic wastewater and the ammonia-containing circulating liquid in the AN unit's quench tower within the mixer, it is specifically used for:

[0140] Open the injection valve located at the end of the corrosion-resistant delivery pipeline and at the front end of the mixer inlet to allow the precisely regulated acidic wastewater to enter the first inlet of the mixer;

[0141] Simultaneously, ammonia-containing circulating liquid is drawn from the outlet pipeline of the circulating pump of the AN unit's quench tower and introduced into the second inlet of the mixer;

[0142] The acidic wastewater and the ammonia-containing circulating liquid entering the mixer are transported to the spiral guide vane area inside the mixer. The spiral guide vane has a spiral angle of 30°-45° and a number of 4-6 blades.

[0143] In the region of the spiral guide vanes, the acidic wastewater and the ammonia-containing circulating liquid flowing in parallel are cut, rotated and overturned to generate a uniformly mixed fluid, and the uniformly mixed fluid is discharged from the outlet of the mixer.

[0144] When the mixing and neutralization module neutralizes excess ammonia in the ammonia-containing circulating liquid using the sulfuric acid component in the acidic wastewater to generate ammonium sulfate neutralized water for the acidic wastewater, it is specifically used for:

[0145] The uniformly mixed fluid discharged from the mixer is introduced into the circulating liquid body of the AN unit quench tower, so that the uniformly mixed fluid is dispersed in the ammonia-containing circulating liquid;

[0146] Within the main body of the circulating liquid, the sulfuric acid component carried in the mixed fluid undergoes an acid-base neutralization reaction with excess ammonia molecules dissolved in the ammonia-containing circulating liquid to generate neutralized water containing ammonium sulfate.

[0147] The ammonium sulfate salt is dissolved in the ammonia-containing circulating liquid to generate ammonium sulfate neutralized water containing the acidic wastewater.

[0148] The mixing and neutralization module, when performing an acid-base neutralization reaction between the sulfuric acid component carried in the mixed fluid and excess ammonia molecules dissolved in the ammonia-containing circulating liquid to generate neutralized water containing ammonium sulfate, is specifically used for:

[0149] The mixed fluid discharged from the mixer is introduced into the main body of the circulating liquid of the AN unit quench tower, so that the sulfuric acid component carried by the mixed fluid is uniformly dispersed in the ammonia-containing circulating liquid;

[0150] The continuous circulation of the ammonia-containing circulating liquid in the AN device quench tower drives the dispersed sulfuric acid components to ionize hydrogen ions, and at the same time drives the excess ammonia molecules dissolved in the ammonia-containing circulating liquid to ionize hydroxide ions.

[0151] During the circulation of the ammonia-containing circulating liquid, the ionized hydrogen ions collide and combine with the hydroxide ions, while the sulfate ions in the sulfuric acid component associate with the ammonium ions in the excess ammonia molecules to generate neutralized water containing ammonium sulfate.

[0152] The injection valve, installed at the end of the corrosion-resistant delivery pipeline and at the front of the mixer inlet, is opened by control commands. The mixer has two sets of coaxially arranged spiral guide vanes, each with a spiral angle of 30° to 45° and 4 to 6 vanes. The injection valve forms a delivery path with the corrosion-resistant delivery pipeline. After the valve is opened, the acidic wastewater, whose flow rate has been precisely regulated by the injection control module, can flow smoothly along the pipeline and directly enter the first inlet of the mixer. This acidic wastewater is the neutralized wastewater generated by the SAR device. After preliminary water quality analysis and flow regulation, it has the physical properties and flow characteristics to match the neutralization reaction of the AN device's quench tower. The opening state of the injection valve directly determines the on / off flow of acidic wastewater to the mixer.

[0153] While the acidic wastewater enters the first inlet of the mixer, the ammonia-containing circulating liquid in the AN unit's quench tower is directionally drawn out from the circulating pump outlet pipeline. This ammonia-containing circulating liquid comes directly from the circulating water system of the AN unit's quench tower and carries excess ammonia produced in the tower reaction. It is the medium that needs to undergo a neutralization reaction with the acidic wastewater. The drawn ammonia-containing circulating liquid is directly introduced into the second inlet of the mixer through a dedicated connecting pipeline, realizing the synchronous feeding of acidic wastewater and ammonia-containing circulating liquid into the mixer, ensuring that the two media can complete the subsequent mixing operation in the mixer.

[0154] Relying on the fluid's own transport power and the pressure within the pipeline, the acidic wastewater entering the first inlet of the mixer and the ammonia-containing circulating liquid entering the second inlet are simultaneously transported to the pre-set spiral guide vane area inside the mixer. This area is the core mixing chamber of the mixer, and the spiral guide vanes arranged inside provide structural support for forced turbulent mixing. The two media enter this area along a pre-set path under pressure, providing the material basis for subsequent cutting, rotating, and flipping operations. Both media entering this area maintain their previous transport state and material characteristics.

[0155] Within the spiral guide vane region of the mixer, acidic wastewater and ammonia-containing circulating liquid flow in parallel along the grooves of the spiral guide vanes. During the flow, the two media are continuously cut into fine fluid bundles by the structural obstruction and guidance of the spiral guide vanes. Simultaneously, under the spiral guidance of the vanes, they undergo high-speed rotation and reciprocating tumbling motions, allowing sufficient contact and fusion between the liquid phases of the acidic wastewater and the ammonia-containing circulating liquid. This eliminates the local concentration difference between the two media, ultimately forming a homogeneous and fully mixed fluid for the AN unit's quench tower. Then, relying on the fluid pressure inside the mixer, this homogeneous mixed fluid is continuously discharged from the mixer outlet, providing a homogeneous reaction medium for subsequent neutralization reactions in the quench tower. All materials in this homogeneous mixed fluid originate from the thorough mixing of acidic wastewater and ammonia-containing circulating liquid, and its mixing uniformity is directly determined by the forced turbulent mixing operation in the spiral guide vane region.

[0156] Relying on the pipeline pressure between the mixer outlet and the AN unit quench tower, the uniformly mixed fluid discharged from the mixer is directly introduced into the main circulating liquid inside the AN unit quench tower. This uniformly mixed fluid comes directly from the forced turbulent mixing of acidic wastewater and ammonia-containing circulating liquid in the mixer. The main circulating liquid is the ammonia-containing medium that is continuously circulating inside the AN unit quench tower. After the uniformly mixed fluid enters, it is quickly dispersed throughout the ammonia-containing circulating liquid by means of the flow and stirring action of the circulating liquid inside the tower, eliminating local medium concentration differences and providing sufficient contact conditions for the subsequent acid-base neutralization reaction. The power for the dispersion process comes from the natural flow of the circulating system inside the tower, without the intervention of additional power.

[0157] Within the circulating liquid body of the AN unit's quench tower, the sulfuric acid component carried in the uniformly mixed fluid disperses with the fluid and comes into full contact with the ammonia-containing circulating liquid. This sulfuric acid component originates directly from the acidic wastewater of the SAR unit. The excess ammonia molecules dissolved in the ammonia-containing circulating liquid serve as the neutralization medium generated by the reaction within the tower. After the two come into contact with each other in the liquid phase environment, a natural acid-base neutralization reaction occurs. The acidic ions in the sulfuric acid component combine with the ammonia molecules, completing the acid-base neutralization transformation and ultimately generating ammonium sulfate from the acidic wastewater. This ammonium sulfate is a solid product of the acid-base neutralization reaction, and its amount is determined by the content of sulfuric acid component in the acidic wastewater and the content of excess ammonia in the ammonia-containing circulating liquid. The reaction process is a natural chemical transformation without additional catalytic or heating conditions.

[0158] The ammonium sulfate salt from the acidic wastewater generated by the acid-base neutralization reaction is placed in the ammonia-containing circulating liquid environment of the AN unit's quench tower. With the help of the continuous flow and stirring of the circulating liquid in the tower, the ammonium sulfate salt completes the dissolution process in the liquid phase. The solid ammonium sulfate salt is completely converted into a dissolved state in the liquid phase and mixes with the water and other dissolving media in the circulating liquid, ultimately generating ammonium sulfate neutralized water containing the acidic wastewater. This ammonium sulfate neutralized water is a homogeneous liquid medium, and all its components come from the acidic wastewater, the ammonia-containing circulating liquid, and the neutralization reaction products of the two. The completion of the dissolution process marks the end of the entire neutralization reaction process. The generated ammonium sulfate neutralized water will participate in the normal circulation of the AN unit's quench tower, realizing the resource utilization of acidic wastewater and the neutralization treatment of the ammonia-containing circulating liquid.

[0159] Relying on the pipeline pressure between the mixer outlet and the AN unit quench tower, the uniformly mixed fluid discharged from the mixer is directly introduced into the main circulating liquid inside the AN unit quench tower. This uniformly mixed fluid comes directly from the forced turbulent mixing of acidic wastewater and ammonia-containing circulating liquid in the mixer. The main circulating liquid is the ammonia-containing medium that is continuously circulating inside the AN unit quench tower. After the uniformly mixed fluid enters, it is quickly dispersed throughout the ammonia-containing circulating liquid by means of the flow and stirring action of the circulating liquid inside the tower, eliminating local medium concentration differences and providing sufficient contact conditions for the subsequent acid-base neutralization reaction. The power for the dispersion process comes from the natural flow of the circulating system inside the tower, without the intervention of additional power.

[0160] Within the circulating liquid body of the AN unit's quench tower, the sulfuric acid component carried in the uniformly mixed fluid disperses with the fluid and comes into full contact with the ammonia-containing circulating liquid. This sulfuric acid component originates directly from the acidic wastewater of the SAR unit. The excess ammonia molecules dissolved in the ammonia-containing circulating liquid serve as the neutralization medium generated by the reaction within the tower. After the two come into contact with each other in the liquid phase environment, a natural acid-base neutralization reaction occurs. The acidic ions in the sulfuric acid component combine with the ammonia molecules, completing the acid-base neutralization transformation and ultimately generating ammonium sulfate from the acidic wastewater. This ammonium sulfate is a solid product of the acid-base neutralization reaction, and its amount is determined by the content of sulfuric acid component in the acidic wastewater and the content of excess ammonia in the ammonia-containing circulating liquid. The reaction process is a natural chemical transformation without additional catalytic or heating conditions.

[0161] The ammonium sulfate salt from the acidic wastewater generated by the acid-base neutralization reaction is placed in the ammonia-containing circulating liquid environment of the AN unit's quench tower. With the help of the continuous flow and stirring of the circulating liquid in the tower, the ammonium sulfate salt completes the dissolution process in the liquid phase. The solid ammonium sulfate salt is completely converted into a dissolved state in the liquid phase and mixes with the water and other dissolving media in the circulating liquid, ultimately generating ammonium sulfate neutralized water containing the acidic wastewater. This ammonium sulfate neutralized water is a homogeneous liquid medium, and all its components come from the acidic wastewater, the ammonia-containing circulating liquid, and the neutralization reaction products of the two. The completion of the dissolution process marks the end of the entire neutralization reaction process. The generated ammonium sulfate neutralized water will participate in the normal circulation of the AN unit's quench tower, realizing the resource utilization of acidic wastewater and the neutralization treatment of the ammonia-containing circulating liquid.

[0162] The beneficial effects are as follows: the dual-inlet synchronous feeding design ensures that acidic wastewater and ammonia-containing circulating liquid enter the mixer precisely, avoiding uneven mixing caused by delayed feeding of a single material stream, and laying a uniform material foundation for the subsequent neutralization reaction. Through the cutting, rotating, and tumbling action of the spiral guide vanes, forced turbulent mixing of the two fluids is achieved, breaking the limitations of natural mixing, significantly increasing the contact area and mixing efficiency between the liquid phases, and eliminating local concentration differences.

[0163] The generated homogeneous mixed fluid ensures that the sulfuric acid component and ammonia molecules are in full contact, providing good reaction conditions for the subsequent acid-base neutralization reaction and avoiding problems such as insufficient reaction and low utilization rate of sulfuric acid component due to uneven mixing.

[0164] The entire mixing process is achieved through the equipment's structural design, eliminating the need for additional chemical additives or power units, thus reducing energy consumption and operating costs. At the same time, it ensures the stability and continuity of the mixing process, making it suitable for large-scale industrial production.

[0165] The structured design of the mixer makes the mixing effect predictable and controllable, avoids the influence of human operation on the mixing quality, and ensures the efficiency and purity of the ammonium sulfate neutralized water produced in the subsequent neutralization reaction.

[0166] The uniformly mixed fluid is fully dispersed in the circulating liquid, ensuring that the sulfuric acid component and the excess ammonia molecules are in full contact, avoiding insufficient local reaction, and greatly improving the neutralization reaction efficiency and the utilization rate of sulfuric acid component.

[0167] By using acid-base neutralization reactions to directionally convert excess ammonia into high-value ammonium sulfate, the resource-based transformation of pollutants in acidic wastewater and ammonia-containing circulating liquid is achieved, turning waste into treasure.

[0168] Ammonium sulfate dissolves in the circulating liquid to form stable ammonium sulfate neutralized water, avoiding equipment blockage caused by solid salt deposition and ensuring the stable operation of the quench tower circulation system.

[0169] The neutralization and dissolution processes do not require the addition of additional chemical reagents, relying solely on the reaction of the material's own components, thus reducing reagent consumption and operating costs, and generating no secondary pollution.

[0170] The generated ammonium sulfate neutralized water can participate in the quench tower circulation, which not only replenishes the water in the tower to maintain the water balance, but also realizes the recycling of resources and improves the overall resource recovery efficiency of the process.

[0171] The sulfuric acid component is uniformly dispersed in the ammonia-containing circulating liquid to avoid excessively high or low local concentrations, ensuring full contact with excess ammonia molecules, creating conditions for a full neutralization reaction, and improving the utilization rate of the sulfuric acid component.

[0172] Ion ionization is driven by the natural circulation of circulating fluid, eliminating the need for additional ionization promoters or power devices, thus reducing energy consumption and operating costs. Furthermore, the ionization process is gentle and stable, making it suitable for continuous process operation requirements.

[0173] The combination of hydrogen ions and hydroxide ions, and the association of sulfate ions and ammonium ions occur simultaneously, resulting in the directional formation of ammonium sulfate salts. This process exhibits high selectivity, reduces the production of byproducts, and ensures the purity of the neutralized water.

[0174] The reaction process is deeply integrated with the circulating liquid flow, and fluid dynamics are used to promote ion collision and combination, accelerate the reaction rate, shorten the neutralization reaction cycle, and improve the overall process efficiency.

[0175] The generated ammonium sulfate salt is evenly dispersed in the neutralized water, avoiding scaling or blockage of the equipment caused by local salt deposition, and ensuring the long-term stable operation of the quench tower circulation system.

[0176] The balance adjustment module is used to monitor the pH value and temperature of the AN unit quench tower in real time. Based on the monitoring results, it forms a feedback control loop and negatively adjusts the delivery rate of the acidic wastewater to maintain the water balance and pH balance of the circulating liquid containing the ammonium sulfate neutralized water in the AN unit quench tower.

[0177] In this embodiment of the invention, the balance adjustment module, while performing real-time monitoring of the pH and temperature of the AN unit's quench tower, and constructing a feedback control loop based on the monitoring results to negatively adjust the flow rate of the acidic wastewater to maintain the water balance and pH balance of the circulating liquid containing the ammonium sulfate neutralized water in the AN unit's quench tower, is specifically used for:

[0178] The real-time pH value and temperature of the circulating liquid are collected in real time by an online pH value monitor and temperature sensor installed in the quench tower of the AN device.

[0179] The real-time pH value is compared with a preset target pH value range to generate the pH deviation signal of the AN device quench tower;

[0180] The collected real-time temperature is compared with the preset target temperature range to generate a temperature deviation signal for the AN device's quench tower.

[0181] The acid-base deviation signal and the temperature deviation signal are transmitted to the controller to generate a comprehensive adjustment command for the AN device quench tower;

[0182] The integrated adjustment command is output to the regulating valve on the corrosion-resistant delivery pipeline to drive the regulating valve to adjust the valve opening, thereby adjusting the delivery volume of the acidic wastewater.

[0183] By adjusting the acidic wastewater flow rate, the pH value of the circulating liquid in the AN unit's quench tower is brought back to the preset target pH value range, and the temperature of the circulating liquid is brought back to the preset target temperature range, so as to maintain the water balance and acid-base balance of the AN unit's quench tower.

[0184] like Figure 3 As shown, an online pH monitor and a temperature sensor, installed inside the quench tower of the AN unit and in direct contact with the circulating liquid, continuously monitor the circulating liquid containing ammonium sulfate-neutralized water. The online pH monitor senses the hydrogen ion concentration of the circulating liquid and converts it into a real-time pH value, while the temperature sensor senses the temperature change of the circulating liquid and converts it into a real-time temperature. Both types of monitoring data are directly derived from the actual state of the circulating liquid inside the quench tower, accurately reflecting the current pH and temperature characteristics of the circulating liquid, and providing raw detection data for subsequent balance adjustment.

[0185] The real-time pH value collected by the online pH value monitor is compared with a preset target pH value range set according to the process operation requirements of the AN unit quench tower. The preset target pH value range is 6.5~7.5, which is determined according to the pH requirements of the circulating liquid required for the normal operation of the AN unit quench tower. The direction and degree of deviation between the real-time pH value and the preset target pH value range are determined. Based on the comparison results, an pH deviation signal of the AN unit quench tower is generated, which can intuitively reflect the pH deviation state. All data of this signal comes from the comparison results of the real-time pH value and the preset target pH value range, and directly reflects the pH balance state of the circulating liquid.

[0186] The real-time temperature collected by the temperature sensor is compared with the preset target temperature range set in advance according to the process operation requirements of the AN unit quench tower. The preset target temperature range is 35℃~45℃, which is determined according to the process design parameters of the AN unit quench tower. The direction and degree of deviation between the real-time temperature and the preset target temperature range are clarified. Based on the comparison results, a temperature deviation signal of the AN unit quench tower that can intuitively reflect the temperature deviation state is generated. All data of this signal comes from the comparison results of the real-time temperature and the preset target temperature range, directly reflecting the temperature change state of the circulating liquid.

[0187] The generated acid-base deviation signal and temperature deviation signal are synchronously transmitted to the controller connected to the regulating valve and flow meter on the corrosion-resistant delivery pipeline through an electrically connected transmission path. After receiving the two types of deviation signals, the controller performs comprehensive analysis and, combined with the correlation between the deviation reflected by the two types of signals and the acid wastewater delivery volume, formulates an appropriate adjustment strategy. This generates a comprehensive adjustment command for the AN unit quench tower that can guide the flow rate adjustment. This command is generated entirely based on the process state reflected by the two types of deviation signals and directly points to the adjustment operation of the acid wastewater delivery volume.

[0188] The integrated control command generated by the controller is output to the regulating valve installed on the corrosion-resistant delivery pipeline through an electrical connection transmission path. After receiving the integrated control command, the regulating valve activates its internal drive structure and changes the opening degree of the valve port according to the command requirements. The adjustment of the valve port opening directly changes the delivery diameter of acidic wastewater in the pipeline, thereby achieving precise adjustment of the acidic wastewater delivery volume. The execution of the adjustment process is entirely based on the integrated control command output by the controller, which directly determines the delivery volume of acidic wastewater to the quench tower.

[0189] After the acidic wastewater flow rate, adjusted by the regulating valve, enters the quench tower of the AN unit, the new acidic wastewater continuously mixes with the original circulating liquid in the tower and undergoes a neutralization reaction. While replenishing the water required by the quench tower, it also adjusts the acidic component content of the circulating liquid, gradually offsetting the original acid-base deviation and temperature deviation of the circulating liquid. This causes the real-time acid-base value of the circulating liquid in the tower to gradually return to the preset target acid-base value range, and the real-time temperature of the circulating liquid to gradually return to the preset target temperature range. While maintaining the stability of the acid-base and temperature of the circulating liquid, it replenishes the water demand of the quench tower, achieving continuous stability of the water balance and acid-base balance in the quench tower of the AN unit. All the adjustment power in the entire balance maintenance process comes from the adjustment of the acidic wastewater flow rate, and the adjustment effect is directly reflected in the return of the acid-base value and temperature of the circulating liquid.

[0190] The beneficial effects are that it allows for real-time monitoring of the pH and temperature of the circulating fluid, comprehensively capturing changes in the process status, providing timely and reliable raw data support for precise adjustment, and avoiding imbalances caused by lag in parameter monitoring.

[0191] By generating deviation signals and outputting comprehensive adjustment commands, a closed-loop adjustment mechanism is established to achieve dynamic and precise control of the acidic wastewater delivery volume, ensuring that the circulating liquid parameters quickly return to the preset range and improving the response speed and accuracy of balance maintenance.

[0192] To ensure the consistency of the AN unit's quench tower process conditions, it is necessary to maintain the water balance, acid-base balance, and temperature stability of the circulating liquid, thereby avoiding the impact of parameter fluctuations on the neutralization reaction efficiency and the quality of ammonium sulfate products.

[0193] It can complete the entire monitoring and adjustment process without human intervention, reducing human error, adapting to the needs of continuous industrial production, and reducing operation and maintenance costs and labor intensity.

[0194] The dynamic balance adjustment mechanism can cope with process fluctuations such as wastewater quality and ammonia content, enhance the stability and anti-interference ability of the system operation, and ensure the continuous and efficient operation of the resource utilization process.

[0195] Reference Figure 2 The diagram shown is a flowchart illustrating a method for the resource utilization of wastewater neutralized by a SAR device according to an embodiment of the present invention. In this embodiment, the method for the resource utilization of wastewater neutralized by a SAR device includes:

[0196] S1. Perform water quality analysis on the acidic wastewater generated during the operation of the SAR device to obtain the key physical property parameters of the acidic wastewater;

[0197] S2. The acidic wastewater is transported to the inlet pipeline of the circulating pump of the AN unit quench tower through a corrosion-resistant pipeline, so that the acidic wastewater serves as a supplementary water source for the AN unit quench tower.

[0198] S3. Based on the key physical property parameters and the ammonia content monitored in real time in the quench tower of the AN device, a feedforward control loop is formed by the linkage control of the regulating valve and the flow meter to accurately regulate the injection volume of the acidic wastewater.

[0199] S4. The injected acidic wastewater and the ammonia-containing circulating liquid in the AN device quench tower are subjected to forced turbulent mixing in a mixer, and the sulfuric acid component in the acidic wastewater is used to neutralize the excess ammonia in the ammonia-containing circulating liquid to generate ammonium sulfate neutralized water of the acidic wastewater.

[0200] S5. Monitor the pH and temperature of the AN device quench tower in real time, and form a feedback control loop based on the monitoring results. Adjust the delivery rate of the acidic wastewater through negative feedback to maintain the water balance and acid-base balance of the circulating liquid containing the ammonium sulfate neutralized water in the AN device quench tower.

[0201] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention.

[0202] The embodiments of this application can acquire and process relevant data based on artificial intelligence technology. Artificial intelligence is the theory, method, technology, and application system that uses digital computers or machines controlled by digital computers to simulate, extend, and expand human intelligence, perceive the environment, acquire knowledge, and use that knowledge to obtain optimal results.

[0203] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A resource utilization system for wastewater neutralized by a SAR device, characterized in that, The system includes a water quality analysis module, a wastewater transport module, an injection control module, a mixing and neutralization module, and a balance adjustment module, wherein: The water quality analysis module is used to analyze the acidic wastewater generated during the operation of the SAR device and obtain the key physical property parameters of the acidic wastewater. The wastewater conveying module is used to convey the acidic wastewater through a corrosion-resistant conveying pipeline to the inlet pipeline of the circulating pump of the AN unit quench tower, so that the acidic wastewater serves as a supplementary water source for the AN unit quench tower. The injection control module is used to precisely regulate the injection volume of acidic wastewater based on the key physical property parameters and the ammonia content monitored in real time in the quench tower of the AN device, through the linkage control of the regulating valve and the flow meter to form a feedforward control loop. The mixing and neutralization module is used to force turbulent mixing of the injected acidic wastewater and the ammonia-containing circulating liquid in the AN unit's quench tower within the mixer, and to neutralize the excess ammonia in the ammonia-containing circulating liquid using the sulfuric acid component in the acidic wastewater, thereby generating ammonium sulfate neutralized water for the acidic wastewater. The balance adjustment module is used to monitor the pH value and temperature of the AN unit quench tower in real time. Based on the monitoring results, it forms a feedback control loop and negatively adjusts the delivery rate of the acidic wastewater to maintain the water balance and pH balance of the circulating liquid containing the ammonium sulfate neutralized water in the AN unit quench tower.

2. The resource utilization system for wastewater neutralized by a SAR device as described in claim 1, characterized in that, When the water quality analysis module performs water quality analysis on the acidic wastewater generated during the operation of the SAR device to obtain the key physical property parameters of the acidic wastewater, it is specifically used for: Collect acidic wastewater from the outlet of the circulating pump of the SAR device's quencher; The acidic wastewater is subjected to pH testing to obtain pH data. The acidic wastewater was subjected to ion chromatography analysis to determine the content of sulfuric acid components in the acidic wastewater; The real-time temperature of the acidic wastewater at the outlet of the SAR device's quencher is monitored to obtain the temperature data of the acidic wastewater. By integrating the pH data, the component content, and the temperature data, the key physical properties of the acidic wastewater are obtained.

3. The resource utilization system for wastewater neutralized by a SAR device as described in claim 1, characterized in that, When the wastewater conveying module conveys the acidic wastewater through a corrosion-resistant pipeline to the inlet pipeline of the circulating pump of the AN unit's quench tower, so that the acidic wastewater serves as a makeup water source for the AN unit's quench tower, it is specifically used for: Start the delivery pump installed at the beginning of the corrosion-resistant delivery pipeline; The acidic wastewater is drawn from the storage tank of the SAR device quencher and introduced into a corrosion-resistant pipeline lined with polytetrafluoroethylene. The acidic wastewater is guided to flow along the corrosion-resistant conveying pipeline, passing through corrosion-resistant valves and flow meters on the pipeline, so as to regulate and monitor the conveying status of the acidic wastewater. The acidic wastewater flowing through the corrosion-resistant valve and the flow meter is transported to the inlet pipeline of the circulating pump of the AN unit quench tower, so that the acidic wastewater serves as a supplementary water source for the AN unit quench tower.

4. The resource utilization system for wastewater neutralized by a SAR device as described in claim 1, characterized in that, The injection control module, when executing a feedforward control loop based on the key physical property parameters and the ammonia content monitored in real time within the AN unit's quench tower, and through the linkage control of the regulating valve and flow meter to precisely regulate the injection volume of the acidic wastewater, is specifically used for: Obtain the ammonia content in the quench tower of the AN device in real time; The key physical property parameters and the ammonia content are input into the controller connected to the regulating valve and the flow meter; In the controller, a regulating valve opening command corresponding to the current ammonia content is generated based on the key physical property parameters and the ammonia content. The control valve opening command is output to the control valve on the corrosion-resistant delivery pipeline to drive the control valve to adjust its opening. The flow meter collects the adjusted acidic wastewater flow rate in real time and feeds the acidic wastewater flow rate back to the controller. The controller compares the acidic wastewater flow rate with a preset target flow rate range and adjusts the opening of the regulating valve according to the comparison result until the acidic wastewater flow rate stabilizes within the preset target flow rate range.

5. The resource utilization system for wastewater neutralized by a SAR device as described in claim 4, characterized in that, The injection control module, when correcting the opening of the regulating valve based on the comparison results until the acidic wastewater flow rate stabilizes within the preset target flow range, specifically performs the following functions: The acidic wastewater flow rate value is compared with the preset target flow rate range; When the flow rate of the acidic wastewater is within the preset target flow rate range, a signal is generated to maintain the current opening of the regulating valve, so as to drive the regulating valve to keep the existing opening unchanged; When the flow rate of the acidic wastewater is lower than the lower limit of the preset target flow range, a positive adjustment signal is generated for the regulating valve to drive the regulating valve to increase its opening. When the flow rate of the acidic wastewater is higher than the upper limit of the preset target flow range, a negative adjustment signal is generated for the regulating valve to drive the regulating valve to reduce its opening.

6. The resource utilization system for wastewater neutralized by a SAR device as described in claim 1, characterized in that, The mixing and neutralization module, when performing forced turbulent mixing of the injected acidic wastewater and the ammonia-containing circulating liquid in the AN unit's quench tower within the mixer, is specifically used for: Open the injection valve located at the end of the corrosion-resistant delivery pipeline and at the front end of the mixer inlet to allow the precisely regulated acidic wastewater to enter the first inlet of the mixer; Simultaneously, ammonia-containing circulating liquid is drawn from the outlet pipeline of the circulating pump of the AN unit's quench tower and introduced into the second inlet of the mixer; The acidic wastewater and the ammonia-containing circulating liquid entering the mixer are transported to the spiral guide vane area inside the mixer. The spiral guide vane has a spiral angle of 30°-45° and a number of 4-6 blades. In the region of the spiral guide vanes, the acidic wastewater and the ammonia-containing circulating liquid flowing in parallel are cut, rotated and overturned to generate a uniformly mixed fluid, and the uniformly mixed fluid is discharged from the outlet of the mixer.

7. The resource utilization system for wastewater neutralized by a SAR device as described in claim 6, characterized in that, When the mixing and neutralization module neutralizes excess ammonia in the ammonia-containing circulating liquid using the sulfuric acid component in the acidic wastewater to generate ammonium sulfate neutralized water for the acidic wastewater, it is specifically used for: The uniformly mixed fluid discharged from the mixer is introduced into the circulating liquid body of the AN unit quench tower, so that the uniformly mixed fluid is dispersed in the ammonia-containing circulating liquid; Within the main body of the circulating liquid, the sulfuric acid component carried in the mixed fluid undergoes an acid-base neutralization reaction with excess ammonia molecules dissolved in the ammonia-containing circulating liquid to generate neutralized water containing ammonium sulfate. The ammonium sulfate salt is dissolved in the ammonia-containing circulating liquid to generate ammonium sulfate neutralized water containing the acidic wastewater.

8. The resource utilization system for wastewater neutralized by a SAR device as described in claim 7, characterized in that, The mixing and neutralization module, when performing an acid-base neutralization reaction between the sulfuric acid component carried in the mixed fluid and excess ammonia molecules dissolved in the ammonia-containing circulating liquid to generate neutralized water containing ammonium sulfate, is specifically used for: The mixed fluid discharged from the mixer is introduced into the main body of the circulating liquid of the AN unit quench tower, so that the sulfuric acid component carried by the mixed fluid is uniformly dispersed in the ammonia-containing circulating liquid; The continuous circulation of the ammonia-containing circulating liquid in the AN device quench tower drives the dispersed sulfuric acid components to ionize hydrogen ions, and at the same time drives the excess ammonia molecules dissolved in the ammonia-containing circulating liquid to ionize hydroxide ions. During the circulation of the ammonia-containing circulating liquid, the ionized hydrogen ions collide and combine with the hydroxide ions, while the sulfate ions in the sulfuric acid component associate with the ammonium ions in the excess ammonia molecules to generate neutralized water containing ammonium sulfate.

9. A resource utilization system for wastewater neutralized by a SAR device as described in claim 4, characterized in that, The balance adjustment module performs real-time monitoring of the pH and temperature of the AN unit's quench tower. Based on the monitoring results, it forms a feedback control loop and uses negative feedback to adjust the flow rate of the acidic wastewater to maintain the water balance and pH balance of the circulating liquid containing the ammonium sulfate neutralized water in the AN unit's quench tower. Specifically, it is used for: The real-time pH value and temperature of the circulating liquid are collected in real time by an online pH value monitor and temperature sensor installed in the quench tower of the AN device. The real-time pH value is compared with a preset target pH value range to generate the pH deviation signal of the AN device quench tower; The collected real-time temperature is compared with the preset target temperature range to generate a temperature deviation signal for the AN device's quench tower. The acid-base deviation signal and the temperature deviation signal are transmitted to the controller to generate a comprehensive adjustment command for the AN device quench tower; The integrated adjustment command is output to the regulating valve on the corrosion-resistant delivery pipeline to drive the regulating valve to adjust the valve opening, thereby adjusting the delivery volume of the acidic wastewater. By adjusting the acidic wastewater flow rate, the pH value of the circulating liquid in the AN unit's quench tower is brought back to the preset target pH value range, and the temperature of the circulating liquid is brought back to the preset target temperature range, so as to maintain the water balance and acid-base balance of the AN unit's quench tower.

10. A method for resource utilization of wastewater neutralized by a SAR device, characterized in that, A resource utilization system for neutralizing wastewater using a SAR device according to claim 1, the method being: S1. Perform water quality analysis on the acidic wastewater generated during the operation of the SAR device to obtain the key physical property parameters of the acidic wastewater; S2. The acidic wastewater is transported to the inlet pipeline of the circulating pump of the AN unit quench tower through a corrosion-resistant pipeline, so that the acidic wastewater serves as a supplementary water source for the AN unit quench tower. S3. Based on the key physical property parameters and the ammonia content monitored in real time in the quench tower of the AN device, a feedforward control loop is formed by the linkage control of the regulating valve and the flow meter to accurately regulate the injection volume of the acidic wastewater. S4. The injected acidic wastewater and the ammonia-containing circulating liquid in the AN device quench tower are subjected to forced turbulent mixing in a mixer, and the sulfuric acid component in the acidic wastewater is used to neutralize the excess ammonia in the ammonia-containing circulating liquid to generate ammonium sulfate neutralized water of the acidic wastewater. S5. Monitor the pH and temperature of the AN device quench tower in real time, and form a feedback control loop based on the monitoring results. Adjust the delivery rate of the acidic wastewater through negative feedback to maintain the water balance and acid-base balance of the circulating liquid containing the ammonium sulfate neutralized water in the AN device quench tower.

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