Process system and method for increasing the proportion of recycled salt in virgin salt blending

Abstract

The present application relates to the technical field of industrial salt resource utilization, and discloses a process system and method for increasing the use proportion of regenerated salt in original salt mixing, comprising a salt dissolving barrel module, a brine conveying pipeline module, a Kay membrane filtration module and a control and operation module, each module being connected in turn and being linked and controlled by a DCS system. By setting a vertical plate shunt drainage structure, a circular arc baffle and a shunt cap in the salt dissolving barrel module, the stable distribution of salt material in the dissolving area is realized; by using a DN750 square pipeline in the brine conveying pipeline module, the flow state of salt solution is controlled; by monitoring the pressure and liquid level parameters and driving the pneumatic valve to perform control in the Kay membrane filtration module. By setting the vertical plate shunt drainage structure, the circular arc baffle and the shunt cap in the salt dissolving barrel module, the fluid forms a shunt and guide path in the barrel, and the residence process of the salt material in the dissolving area is prolonged, so that the problem of insufficient dissolution of regenerated salt is solved.

Description

Technical Field

[0001] This invention relates to the field of industrial salt resource utilization technology, and in particular to a process system and method for increasing the proportion of recycled salt used in the blending of raw salt. Background Technology

[0002] In the chlor-alkali industry, raw salt is usually used as the main raw material, and salt water for electrolysis is prepared through processes such as salt dissolution, filtration and electrolysis.

[0003] In existing technologies, the salt dissolving process is typically completed within a salt dissolving tank. The internal structure of these tanks often employs simple partitions or flat baffles, allowing the salt and brine to dissolve in contact within the tank. In this structure, the fluid flow path within the tank is relatively simple, with high flow velocities in some areas and insufficient flow in others. This results in uneven distribution of the salt within the tank, with some salt passing through the dissolving zone in a shorter path, failing to achieve sufficient contact. Furthermore, undissolved salt particles tend to deposit at the bottom of the tank or in localized areas, affecting the stability of the salt dissolving process.

[0004] However, in the process of realizing the technical solution of this application, the inventors of this application discovered that the above-mentioned technology has at least the following technical problems: the fluid flow path inside the existing salt dissolving tank is single, and the salt material does not stay in the dissolving zone for a sufficient time, resulting in insufficient dissolution of the regenerated salt during the salt dissolving process. Summary of the Invention

[0005] To overcome the above deficiencies, this invention provides a process system and method for increasing the proportion of recycled salt used in the blending of raw salt, aiming to improve the problem of insufficient dissolution of recycled salt during the salt dissolving process caused by the single fluid flow path inside the existing salt dissolving tank.

[0006] In a first aspect, the present invention provides the following technical solution: a process system for increasing the proportion of recycled salt used in the blending of raw salt, comprising: The salt dissolving tank module is used to achieve the mixing and dissolution of regenerated salt and salt water, and to perform an efficient dissolution process. The salt dissolving tank module is equipped with a vertical plate diversion and diversion structure inside, an arc-shaped baffle at the top, and a diversion cap inside. The brine delivery pipeline module is used to deliver the brine output from the salt dissolving tank module to the membrane filtration module and to perform the delivery process. The brine delivery pipeline module is a DN750 square pipe. The Kai membrane filtration module is used to filter the brine transported by the brine delivery pipeline module and to perform intelligent filtration control. The Kai membrane filtration module includes a remote pressure gauge, a float level gauge, a pneumatic valve, titanium pipeline, an intelligent early warning module, and a touch screen PLC control unit. The control and maintenance module is used for centralized control and operation management of the salt tank module, brine delivery pipeline module and membrane filtration module, and to execute the operation and maintenance management process. The modules are connected in the following order: salt tank module, brine delivery pipeline module, and membrane filter module. They are controlled in conjunction with the DCS system, with the membrane filter module controlled by a PLC and DCS.

[0007] Preferably, in the salt dissolving tank module, the steps for performing the efficient dissolution process include: The fluid entering the salt dissolving tank module is diverted and guided by the vertical plate diversion and diversion structure; The flow path of the fluid is changed by using an arc-shaped baffle to reduce local impact; The fluid is evenly distributed and the salt distribution is controlled by the flow divider cap; The above-mentioned structural synergy extends the residence path of the salt in the dissolution zone and enhances the contact process between the salt and the brine.

[0008] Preferably, in the brine delivery pipeline module, the steps for performing the delivery process include: Brine is transported using DN750 square pipes. Control the flow state of the brine solution within the pipeline; Reduce the scouring effect of undissolved salt particles on pipes and pump bodies; Reduce the crystallization and deposition of salt particles inside the pipe.

[0009] Preferably, in the Kai membrane filtration module, the steps of performing the intelligent filtration control process include: Pressure parameters are collected using a remote pressure gauge; Liquid level parameters are collected using a float level gauge; The intelligent early warning module performs threshold judgments on pressure and liquid level parameters. An alarm signal is output when the detected value reaches the preset condition; The pneumatic valve is driven by the touch screen PLC control unit to perform linkage control.

[0010] Preferably, in the Kai membrane filtration module, the step of performing the intelligent filtration control process further includes: Replace the flexible valve with a pneumatic valve as the actuator; Replace the pipeline with a titanium pipeline; The filtration system maintains its operation through the coordinated action of a remote pressure gauge, a float level gauge, a pneumatic valve, and titanium pipelines.

[0011] Secondly, the present invention provides the following technical solution: a process method for increasing the proportion of recycled salt used in the blending of raw salt, comprising the following steps: S1. Add the recycled salt and raw salt into the salt dissolving tank module according to the preset mass ratio; S2. The salt dissolving tank module performs an efficient dissolution process, ensuring that the regenerated salt and the salt solution come into full contact and dissolve completely. S3. The dissolved brine is delivered to the membrane filtration module through the brine delivery pipeline module to perform a stable delivery process. S4. The intelligent filtration control process is executed through the Kai membrane filtration module to filter the brine and perform parameter monitoring and linkage control. S5. The filtered brine is then transported to the electrolysis production unit. S6. The operation and maintenance management process is executed through the control and maintenance module to manage the operation of the process system.

[0012] Preferably, in step S1, the step of adding the regenerated salt and the original salt into the salt dissolving tank module at a preset mass ratio includes: Screening of quality indicators for recycled salt; Metering control of raw salt; The recycled salt and raw salt are added to the salt dissolving tank module according to a fixed mass ratio; Ensure the stability of the raw material composition entering the salt dissolving tank module.

[0013] Preferably, in step S2, the step of performing the efficient dissolution process through the salt dissolving tank module includes: The fluid is diverted and guided by a vertical plate diversion and diversion structure; The fluid flow path is changed by using an arc-shaped baffle; The salt is evenly distributed through the distribution cap; Control the residence path of the salt in the dissolution zone; This allows the salt to flow in a uniformly distributed manner within the dissolution zone.

[0014] Preferably, in step S4, the step of performing the intelligent filtration control process through the membrane filtration module includes: Collect pressure and liquid level parameters; The parameters are subject to threshold determination; An alarm signal is output when the detected value reaches the preset condition; The PLC drives the execution and interacts with the DCS system to achieve linkage control. Adjusting the operating status of the membrane filter module.

[0015] Preferably, in step S6, the step of executing the operation and maintenance management process through the control and operation and maintenance module includes: Operators shall conduct inspections and record operating parameters; The equipment technicians conduct inspections and check the status of critical equipment. Establish minimum inventory standards for critical spare parts; Record equipment operation, maintenance, and fault information into a full lifecycle archive; To achieve continuous operation and management of the process system.

[0016] The present invention has the following beneficial effects: 1. This invention addresses the problem of insufficient dissolution of regenerated salt by setting a vertical plate diversion and diversion structure, an arc-shaped baffle, and a diversion cap in the salt dissolution tank module, thereby creating a diversion and diversion path for the fluid within the tank and extending the residence time of the salt in the dissolution zone.

[0017] 2. This invention uses a DN750 square pipe for the brine delivery pipeline module and controls the flow state of the brine in the pipeline to stabilize the flow path of the brine during transportation, thereby reducing the scouring and deposition of undissolved salt particles on the pipeline.

[0018] 3. This invention enables the filtration process to be monitored and adjusted in real time by setting up a remote pressure gauge, a float level gauge and a pneumatic valve in the membrane filtration module, and by collecting parameters and controlling them in conjunction with the touch screen PLC control unit, thereby achieving continuous control of the filtration system's operating status. Attached Figure Description

[0019] Figure 1 This is a process system diagram for increasing the proportion of recycled salt used in the blending of raw salt, as proposed in this invention. Figure 2 This is a flow chart of the process method proposed in this invention to increase the proportion of recycled salt used in the blending of raw salt.

[0020] The components include: 1. Diverter cap; 2. Diverter plate; 3. DN750 square water pipe; 4. Remote pressure gauge; 5. Pneumatic valve; 6. Float level gauge; and 7. Titanium pipeline. Detailed Implementation

[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. 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.

[0022] Example 1 Reference Figure 1 In a first embodiment of the present invention, the present invention provides a process system for increasing the proportion of recycled salt used in the blending of raw salt, comprising: The salt dissolving tank module is used to mix and dissolve regenerated salt and salt water, and to perform an efficient dissolving process. The salt dissolving tank module has a vertical plate diversion and diversion structure inside, an arc-shaped baffle on the top, and a diversion cap inside. The brine delivery pipeline module is used to deliver the brine output from the salt dissolving tank module to the Kai membrane filtration module and to perform the delivery process. The brine delivery pipeline module is a DN750 square pipe. The Kaimo filtration module is used to filter the brine transported by the brine delivery pipeline module and to perform intelligent filtration control. The Kaimo filtration module includes a remote pressure gauge, a float level gauge, a pneumatic valve, titanium pipeline, an intelligent early warning module, and a touch screen PLC control unit. The control and maintenance module is used for centralized control and operation management of the salt tank module, brine delivery pipeline module and membrane filtration module, and to execute the operation and maintenance management process. The modules are connected in the following order: salt tank module, brine delivery pipeline module, and membrane filter module. They are controlled in conjunction with the DCS system, with the membrane filter module controlled by a PLC and DCS.

[0023] Specifically, the salt dissolving tank module is equipped with a vertical plate diversion and diversion structure, which consists of multiple diversion plates 2 arranged along the internal space of the salt dissolving tank, so that the fluid entering the salt dissolving tank forms a diversion path under the action of the diversion plates 2; an arc-shaped baffle is set at the top of the salt dissolving tank, covering the upper area of ​​the salt dissolving tank, to change the direction of fluid flow; and a diversion cap 1 is set inside the salt dissolving tank, which is evenly arranged along the inside of the salt dissolving tank to distribute the fluid, so that the salt material forms a multi-path flow state inside the salt dissolving tank.

[0024] The brine delivery pipeline module includes a DN750 square water pipe 3. One end of the DN750 square water pipe 3 is connected to the outlet of the salt dissolving tank module, and the other end is connected to the inlet of the membrane filter module, for continuous brine delivery. The flow cross-section of the DN750 square water pipe 3 is square to form a stable flow channel.

[0025] The Kai membrane filtration module includes a remote pressure gauge 4, a pneumatic valve 5, a float level gauge 6, and a titanium pipeline 7. The remote pressure gauge 4 collects pressure parameters within the filtration system, the float level gauge 6 collects liquid level parameters, the pneumatic valve 5 controls fluid flow, and the titanium pipeline 7 connects the various components and forms a corrosion-resistant transport channel. Both the remote pressure gauge 4 and the float level gauge 6 are connected to an intelligent early warning module, which in turn is connected to a touchscreen PLC control unit. The touchscreen PLC control unit is then connected to the pneumatic valve 5, enabling parameter acquisition and control execution.

[0026] The control and maintenance module includes a touch screen PLC control unit and a parameter recording unit. The DCS system is the central control, and the PLC is used for local control of the membrane filter module.

[0027] Based on the above structure, key parameters for the system operation process are defined. Let the effective dissolution zone volume of the salt tank be... The volumetric flow rate of the brine entering the salt dissolving tank is The average residence time of the salt in the dissolution zone. Represented as: ;in, Indicates the duration of stay. This indicates the volume of the effective dissolution zone in the salt dissolving tank. This indicates the volumetric flow rate of brine entering the salt dissolving tank.

[0028] Let the mass of the regenerated salt added to the salt dissolving tank be . The mass of the regenerated salt that has been completely dissolved is The solubility of regenerated salt Represented as: ;in, Indicates the solubility of regenerated salt. Indicates the quality of regenerated salt. This indicates the mass of the regenerated salt that has been completely dissolved.

[0029] Let the volumetric flow rate of the brine in the brine delivery pipeline module be... The cross-sectional area of ​​the pipe is The average flow velocity of the brine in the pipe is... Represented as: ;in, Indicates the average flow velocity of the brine. Indicates volumetric flow rate, This indicates the cross-sectional area of ​​the pipe through which the flow occurs.

[0030] Let the mass of particulate matter before entering the Kai membrane filter module be... The mass of particulate matter removed during the filtration process is Then the filtration efficiency Represented as: ;in, Indicates filtration efficiency. This indicates the mass of particulate matter before it enters the filtration module. This indicates the mass of particulate matter removed.

[0031] Through the above structural settings and parameter control, the salt tank module, brine delivery pipeline module, and membrane filtration module operate in a predetermined sequence and complete linkage control under the unified scheduling of the DCS system. The PLC is responsible for local execution, thereby realizing the continuous operation of the system.

[0032] Furthermore, in the salt dissolving tank module, the steps for performing the efficient dissolution process include: The fluid entering the salt dissolving tank module is diverted and guided by the vertical plate diversion and diversion structure; The flow path of the fluid is changed by using an arc-shaped baffle to reduce local impact; The fluid is evenly distributed and the salt distribution is controlled by the flow divider cap; The above-mentioned structural synergy extends the residence path of the salt in the dissolution zone and enhances the contact process between the salt and the brine.

[0033] Specifically, the vertical plate diversion and diversion structure consists of multiple diversion plates 2, which are arranged at intervals along the internal space of the salt dissolving tank and fixedly connected to the inner wall of the tank. This allows the brine entering the tank to form multiple parallel flow channels between the diversion plates 2. By setting the diversion plates 2, the original single flow path is transformed into a multi-path flow structure, increasing the flow distance of the fluid within the tank and thus changing the trajectory of the salt within the tank.

[0034] An arc-shaped baffle is installed in the upper part of the salt dissolving tank and extends in an arc along the inner wall of the tank, covering part of the mainstream fluid area. When the fluid passes through the arc-shaped baffle, its direction changes from the original axial flow to a combined radial and axial flow, thereby reducing the impact intensity of the fluid in the local area and allowing the salt to form a stable distribution state inside the tank.

[0035] The flow divider caps 1 are located in the lower part of the salt dissolving tank. Multiple flow divider caps 1 are evenly arranged horizontally, and the spacing between the flow divider caps 1 is controlled. In this scheme, the spacing between the flow divider caps 1 is preferably 0.5m to 1.0m. The flow divider caps 1 are used to redistribute the fluid, changing the fluid from a concentrated flow to a uniform flow state, thereby making the salt uniformly distributed inside the salt dissolving tank.

[0036] Based on the above structure, the residence time of the salt in the dissolving zone of the salt dissolving tank is characterized by the relationship between volume and flow rate. Let the effective dissolving zone volume of the salt dissolving tank be... The volumetric flow rate of the brine entering the salt dissolving tank is The average residence time of the salt in the dissolution zone. Represented as: ; in, This indicates the average residence time of the salt in the dissolution zone. This indicates the volume of the effective dissolution zone in the salt dissolving tank. This indicates the volumetric flow rate of brine entering the brine tank. In this scheme, the residence time... The optimal time is no less than 30 minutes to ensure that the salt has stable residence conditions in the dissolution zone.

[0037] Furthermore, let the mass of the regenerated salt added to the salt dissolving tank be... The mass of the regenerated salt that has been completely dissolved is The solubility of regenerated salt Represented as: ; in, Indicates the solubility of regenerated salt. This indicates the total mass of the recycled salt. This indicates the mass of the regenerated salt after complete dissolution. In this scheme, the combined arrangement of the diversion plate 2, the arc-shaped baffle, and the diversion cap 1 is controlled to achieve... near This leads to increased solubility. Close to 1.

[0038] During actual operation, after the salt and brine enter the salt dissolving tank, they form a flow path under the action of the flow divider 2, change the flow direction under the action of the arc-shaped baffle, and form a uniformly distributed flow state under the action of the flow divider cap 1, so that the salt forms a multi-path circulating flow process in the tank. This flow process ensures that the residence time of the salt in the salt dissolving tank meets the set range and that there is continuous contact between the salt and the brine.

[0039] Through the above structural design, the flow divider 2, flow divider cap 1 and arc-shaped baffle in the salt dissolving tank module work together to increase the fluid path length and prolong the residence time of the salt in the dissolving zone, thereby achieving stable dissolution of the regenerated salt.

[0040] Furthermore, in the brine delivery pipeline module, the steps for performing the delivery process include: Brine is transported using DN750 square pipes. Control the flow state of the brine solution within the pipeline; Reduce the scouring effect of undissolved salt particles on pipes and pump bodies; Reduce the crystallization and deposition of salt particles inside the pipe.

[0041] Specifically, the brine delivery pipeline module uses a DN750 square water pipe 3. The inlet end of the DN750 square water pipe 3 is connected to the outlet of the salt dissolving tank module, and the outlet end is connected to the inlet of the membrane filter module, enabling the dissolved brine to be continuously delivered along a fixed path. The DN750 square water pipe 3 has a square cross-section structure, and its flow cross-sectional area remains consistent along the flow direction to form a stable flow channel.

[0042] The flow state of the brine solution within the DN750 square water pipe 3 is characterized by the relationship between flow rate and cross-sectional area. Let the brine volumetric flow rate be... The effective cross-sectional area of ​​the pipe is The average flow velocity of the brine in the pipe is then... Represented as: ; in, This indicates the average flow rate of the brine solution. Indicates the volumetric flow rate of brine. This represents the flow cross-sectional area of ​​the DN750 square water pipe 3. In this scheme, the flow rate is adjusted... Or select the corresponding cross-sectional area to make the average flow velocity The flow rate should be controlled within a set range, preferably no greater than 1.0 m / s, so that the brine solution maintains a stable flow state in the pipeline.

[0043] Furthermore, during the brine transport process, the flow rate fluctuation range is controlled to maintain a stable flow state. Let the flow rate at a certain moment be... The average flow rate is Then the flow volatility Represented as: ; in, Indicates flow volatility. Indicates instantaneous flow rate. This represents the average flow rate. In this scheme, the flow rate fluctuation rate... It is preferable to control it within ±1.5% to keep the brine solution in a continuous and stable state during transportation.

[0044] Because the cross-sectional area of ​​the DN750 square water pipe 3 is larger than that of the original pipe structure, the average flow velocity of the brine in the pipe decreases under the same flow conditions. This reduces the movement speed of undissolved salt particles within the pipe, thereby reducing the scouring effect of the salt particles on the inner wall of the pipe and the pump body. Simultaneously, due to the stable flow state, the salt particles are evenly distributed within the pipe, reducing particle aggregation in localized areas and thus minimizing the occurrence of crystallization and deposition.

[0045] In actual operation, the brine output from the salt dissolving tank module enters the DN750 square water supply pipe 3 and flows continuously along the pipe direction under the set flow rate conditions, delivering it to the membrane filter module at a stable flow rate. Through the above structural settings and parameter control, the flow state of the brine during the transportation process is maintained within a predetermined range, thereby achieving stable transportation.

[0046] Furthermore, in the Kai membrane filtration module, the steps for executing the intelligent filtration control process include: Pressure parameters are collected using a remote pressure gauge. Liquid level parameters are collected using a float level gauge; The intelligent early warning module performs threshold judgments on pressure and liquid level parameters. An alarm signal is output when the detected value reaches the preset condition; The pneumatic valve is driven by the touch screen PLC control unit to perform linkage control.

[0047] In the Kai membrane filtration module, the steps for executing the intelligent filtration control process also include: Replace the flexible valve with a pneumatic valve as the actuator; Replace the pipeline with a titanium pipeline; The filtration system maintains its operation through the coordinated action of a remote pressure gauge, a float level gauge, a pneumatic valve, and titanium pipelines.

[0048] Specifically, the Kai membrane filtration module is equipped with a remote pressure gauge 4, which is installed on the inlet or outlet pipeline of the filtration equipment. This gauge is used to collect real-time fluid pressure data and transmit the collected pressure signal to the intelligent early warning module. Let the collected pressure parameter be... ,in This indicates the operating pressure of the filtration system. In this solution, the pressure parameter... The upper limit threshold is preferably 60.0 kPa, and the upper-higher limit threshold is preferably 80.0 kPa.

[0049] The Kai membrane filtration module is equipped with a float level gauge 6, which is installed in the liquid level control area of ​​the filtration equipment. It is used to detect the liquid level height within the filtration equipment in real time and transmit the liquid level signal to the intelligent early warning module. Let the liquid level parameter be... ,in This indicates the percentage of liquid level within the filtration equipment. In this solution, the liquid level parameter... The warning threshold is preferably no greater than 80%.

[0050] The intelligent early warning module is used to perform threshold judgment on the data collected by the remote pressure gauge 4 and the float level gauge 6. When the set pressure threshold range is reached, or When the set liquid level threshold is reached, the intelligent early warning module outputs an alarm signal and transmits the signal to the touchscreen PLC control unit. The touchscreen PLC control unit generates a control command based on the received alarm signal and outputs it to the pneumatic valve 5, thereby regulating the fluid flow status.

[0051] Pneumatic valve 5 is installed in the piping system of the membrane filtration module to control the flow of brine in the pipeline. Pneumatic valve 5 is connected to the touch screen PLC control unit and performs opening or closing actions after receiving a control signal to adjust the fluid flow path within the filtration system.

[0052] The titanium tubing 7 is used to connect the various components in the membrane filtration module, forming a complete fluid delivery channel. After replacing the original tubing, the titanium tubing 7 maintains the same connection structure and is used to withstand the fluid pressure during the brine delivery process.

[0053] During the filtration process, after the brine enters the membrane filtration module, the pressure parameters are first collected by the remote pressure gauge 4. Simultaneously, liquid level parameters are collected via float level gauge 6. The above parameters are transmitted to the intelligent early warning module for judgment. When the parameters do not reach the threshold, the system maintains the current operating state; when the parameters reach the set conditions, the intelligent early warning module outputs an alarm signal, which drives the pneumatic valve 5 to perform an action by the touch screen PLC control unit, thereby adjusting the fluid passage.

[0054] Let the mass of the particulate matter before entering the filter module be... The mass of particulate matter removed during the filtration process is Then the filtration efficiency Represented as: ; in, Indicates filtration efficiency. This indicates the mass of particulate matter before it enters the filtration module. This indicates the mass of particulate matter removed. In this solution, the pneumatic valve 5 and the titanium pipeline 7 are used in conjunction to maintain a stable flow state during the filtration process, thereby ensuring stable filtration efficiency.

[0055] Through the above structural setup, the remote pressure gauge 4, float level gauge 6, pneumatic valve 5, and titanium pipeline 7 work together, enabling the KEMET membrane filtration module to acquire parameters, determine thresholds, and perform control during operation, thereby achieving continuous operation of the filtration process.

[0056] Example 2: Reference Figure 2 In a second embodiment of the present invention, the present invention provides a process method for increasing the proportion of recycled salt used in the blending of raw salt, comprising the following steps: S1. Add the recycled salt and raw salt into the salt dissolving tank module according to the preset mass ratio; S2. The salt dissolving tank module performs an efficient dissolution process, ensuring that the regenerated salt and the salt solution come into full contact and dissolve completely. S3. The dissolved brine is delivered to the membrane filtration module through the brine delivery pipeline module to perform a stable delivery process. S4. The intelligent filtration control process is executed through the Kai membrane filtration module to filter the brine and monitor and control the parameters. S5. The filtered brine is then transported to the electrolysis production unit. S6. The operation and maintenance management process is executed through the control and maintenance module to manage the operation of the process system.

[0057] Specifically, in step S1, the raw materials entering the salt dissolving tank module are prepared. Regenerated salt and raw salt are measured according to a set mass ratio and added to the salt dissolving tank module in sequence. After the regenerated salt and raw salt are added, they enter the internal area of ​​the salt dissolving tank simultaneously with the brine, forming an initial mixed state. The addition process is completed through a metering device or manual weighing to ensure that the composition of the salt entering the salt dissolving tank module remains consistent.

[0058] In step S2, the internal fluid circulation of the salt dissolving tank module is initiated, causing the brine to form a diverted, guided, and uniformly distributed flow path under the action of the diverter plate 2, the arc-shaped baffle, and the diverter cap 1. The salt circulates within the salt dissolving tank under the action of the fluid, maintaining continuous contact within the dissolution zone. By controlling the inlet and outlet flow rates within the salt dissolving tank, the salt maintains a stable residence process within the dissolution zone, thereby completing the dissolution of the regenerated salt and the brine.

[0059] In step S3, the dissolved brine is output from the salt dissolving tank module to the brine delivery pipeline module. After entering the DN750 square water pipe 3, the brine flows continuously along the pipeline direction, and the flow rate is controlled to maintain a stable flow state within the pipeline. During the delivery process, the flow rate and pipeline channel are adjusted to ensure continuous brine flow, reducing the accumulation and adhesion of undissolved salt particles within the pipeline.

[0060] In step S4, after the brine enters the membrane filtration module, the system pressure is first detected by the remote pressure gauge 4, and the liquid level is detected by the float level gauge 6. The detection signals are then transmitted to the intelligent early warning module. The intelligent early warning module judges the collected pressure and liquid level parameters. When the detected values ​​are within the set range, the system maintains its current operating state; when the detected values ​​reach the set conditions, the intelligent early warning module outputs an alarm signal, and the touch screen PLC control unit drives the pneumatic valve 5 to perform an opening or closing action, thereby regulating the fluid passage. The brine completes the particle separation process inside the filtration equipment and is output to the subsequent process through the titanium pipeline 7.

[0061] In step S5, the brine treated by the KEM filter module is transported to the electrolysis production unit through pipelines. The brine is kept in a continuous flow state before entering the electrolysis unit and is connected to the electrolysis system through connecting pipelines.

[0062] In step S6, the system operation is managed through the control and maintenance module. The touchscreen PLC control unit collects and records the operating parameters of the salt tank module, brine delivery pipeline module, and membrane filter module. Simultaneously, operators conduct equipment inspections according to a set schedule, recording operating status parameters. Equipment technicians inspect key components and maintain parts such as the pneumatic valve 5, remote pressure gauge 4, and float level gauge 6. All operating data and maintenance information are entered into the system archive for subsequent operation management.

[0063] By executing the above steps in sequence, a continuous process of regenerated salt is achieved, from addition, dissolution, and transportation to filtration. The operation process is managed through the control and maintenance module.

[0064] Furthermore, in step S1, the step of adding the regenerated salt and the original salt into the salt dissolving tank module at a preset mass ratio includes: Screening of quality indicators for recycled salt; Metering control of raw salt; The recycled salt and raw salt are added to the salt dissolving tank module according to a fixed mass ratio; Ensure the stability of the raw material composition entering the salt dissolving tank module.

[0065] Specifically, before the raw materials enter the salt dissolving tank module, the regenerated salt undergoes quality screening, including screening for main content and impurity content. The regenerated salt is tested to ensure it meets preset quality conditions before being used. In this scheme, the preferred main content of the regenerated salt is no less than 96%, the preferred calcium ion content is no more than 0.2%, the preferred magnesium ion content is no more than 0.1%, and the preferred sulfate ion content is no more than 0.8%. The screened regenerated salt is used for subsequent addition to ensure that the quality of the salt entering the system is within the set range.

[0066] When controlling the metering of raw salt, a metering or weighing device is used to measure the mass of the raw salt, ensuring that the amount of raw salt added meets the preset ratio requirements. After the recycled salt and raw salt are metered separately, they are mixed according to a fixed mass ratio. Let the mass of the recycled salt be... The raw salt mass is The total mass of materials fed is Then the following condition is met: ; in, Indicates the quality of regenerated salt. Indicates the quality of raw salt. This represents the total mass of raw materials. In this scheme, the preferred mass ratio of recycled salt to raw salt is 75:25, which satisfies: Through the above proportional relationship, a stable mixing ratio is formed between the recycled salt and the original salt.

[0067] After metering, the regenerated salt and raw salt are sequentially added to the salt dissolving tank module. During the addition process, the salt enters the internal area of ​​the salt dissolving tank and comes into contact with the brine. After entering the salt dissolving tank module, the salt is gradually dispersed under the action of the diversion plate 2 and the diversion cap 1, forming an initial distribution state, which provides the basic conditions for the subsequent dissolution process.

[0068] During the addition process, the composition of raw materials entering the salt dissolving tank module is kept stable by controlling the order and amount of regenerated salt and raw salt added. This stable state is achieved by controlling the mass ratio of regenerated salt to raw salt and the total amount added, thereby ensuring consistent dissolution conditions within the salt dissolving tank module.

[0069] Through the above steps, the regenerated salt and the original salt are screened and metered before entering the salt dissolving tank module, and a stable ratio is formed during the input process, thereby providing stable initial conditions for the subsequent dissolution process under the action of the diversion plate 2 and the diversion cap 1.

[0070] Furthermore, in step S2, the steps for performing the efficient dissolution process via the salt dissolving tank module include: The fluid is diverted and guided by a vertical plate diversion and diversion structure; The fluid flow path is changed by using an arc-shaped baffle; The salt is evenly distributed through the distribution cap; Control the residence path of the salt in the dissolution zone; This allows the salt to flow in a uniformly distributed manner within the dissolution zone.

[0071] Specifically, in this step, after the salt tank module is started, the brine, along with the regenerated salt and raw salt added in step S1, enters the internal area of ​​the salt tank. The fluid first forms a flow channel under the action of the flow divider 2. The flow divider 2 is arranged longitudinally inside the salt tank, which divides the fluid into multiple parallel flow paths inside the tank, thereby changing the original single flow direction.

[0072] Subsequently, the fluid passes through the arc-shaped baffle in the upper region of the salt tank, changing its flow direction from unidirectional to multidirectional, thus creating a circulating path for the salt within the tank. By altering the flow path, the salt migrates between different areas within the tank, thereby increasing the contact between the salt and the brine.

[0073] As the fluid continues to flow downwards, it is redistributed through flow dividers 1 located inside the salt tank. Multiple flow dividers 1 are arranged horizontally, and in this design, the spacing between the flow dividers 1 is preferably 0.8m. The flow dividers 1 disperse the concentrated fluid flow into multiple localized flow zones, resulting in a uniform distribution of the salt within the tank.

[0074] During the dissolution process, the flow rates of brine entering and exiting the salt dissolving tank are controlled to maintain a predetermined residence time for the salt within the dissolution zone. Let the effective dissolution zone volume of the salt dissolving tank be... The volumetric flow rate of the brine entering the salt dissolving tank is The average residence time of the salt in the dissolution zone. Represented as: ; in, This indicates the average residence time of the salt in the dissolution zone. Indicates the effective dissolution zone volume. This represents the brine volumetric flow rate. In this scheme, the residence time... The contact time should be no less than 30 minutes to ensure that the salt remains in continuous contact with the dissolving agent within the dissolving zone.

[0075] Furthermore, let the mass of the regenerated salt added to the salt dissolving tank be... The mass of the regenerated salt that has been completely dissolved is The solubility of regenerated salt Represented as: ; in, Indicates the solubility of regenerated salt. Indicates the quality of regenerated salt. This indicates the mass of the regenerated salt after complete dissolution. In this scheme, the dissolution process is kept stable and the solubility reaches the set range by controlling the arrangement of the diversion plate 2, the arc-shaped baffle, and the diversion cap 1.

[0076] In this step, the salt is diverted by the flow divider 2, guided by the arc-shaped baffle, and evenly distributed by the flow divider cap 1, forming a multi-path circulating flow inside the salt dissolving tank. This ensures that the salt remains continuously distributed within the dissolving zone and completes the dissolving process within the set residence time. Through the combination of the above structure and parameters, the distribution of the salt within the salt dissolving tank remains stable, thereby enabling the continuous dissolving process.

[0077] Furthermore, in step S4, the steps of executing the intelligent filtration control process through the membrane filtration module include: Collect pressure and liquid level parameters; Perform threshold determination on the parameters; An alarm signal is output when the detected value reaches the preset condition; The PLC drives the execution and interacts with the DCS system to achieve linkage control. Adjusting the operating status of the membrane filter module.

[0078] Specifically, in this step, the brine from the brine delivery pipeline module enters the membrane filtration module via the DN750 square water pipe 3. First, the fluid pressure is collected in real time by a remote pressure gauge 4 installed on the pipeline, and simultaneously, the liquid level is detected in real time by a float level gauge 6 installed inside the filtration device. The remote pressure gauge 4 and the float level gauge 6 transmit the collected pressure and liquid level signals to the intelligent early warning module, respectively.

[0079] After receiving the pressure and liquid level parameters, the intelligent early warning module compares and judges the collected data. Let the pressure parameter collected by the remote pressure gauge 4 be... The level parameters collected by the float level gauge 6 are: .when When compared with a preset pressure threshold, if If the pressure reaches or exceeds the upper limit threshold, it is determined to be abnormal; when When compared with a preset liquid level threshold, if If the level reaches or exceeds the warning threshold, it is determined to be an abnormal liquid level. In this scheme, the upper pressure limit threshold is preferably 60.0 kPa, the very high pressure limit threshold is preferably 80.0 kPa, and the liquid level warning threshold is preferably no greater than 80%.

[0080] When the pressure or level parameter reaches the corresponding threshold, the intelligent early warning module outputs an alarm signal and sends it to the touchscreen PLC control unit. The touchscreen PLC control unit generates a control command based on the received signal and sends it to the pneumatic valve 5. Upon receiving the control command, the pneumatic valve 5 performs an opening or closing action, thereby changing the flow path or on / off state of the fluid in the pipeline.

[0081] Pneumatic valve 5 is located at a critical pipeline position in the Kelvin membrane filtration module to regulate fluid flow; titanium pipeline 7 connects the various components within the Kelvin membrane filtration module, forming a complete fluid channel. In this solution, titanium pipeline 7 replaces the original pipeline, maintaining the same connection method, and is used to carry the fluid transport during the filtration process.

[0082] During the filtration process, the brine undergoes particle separation within the membrane filtration module, and the filtered brine is output through the titanium pipeline 7. When the system operating parameters are within the set range, the pneumatic valve 5 maintains its current state; when an abnormal pressure or liquid level is detected, the fluid path is adjusted by the action of the pneumatic valve 5, restoring the filtration system to the set operating state.

[0083] Through the above steps, the remote pressure gauge 4, float level gauge 6, pneumatic valve 5, and titanium pipeline 7 form a linkage control relationship, realizing real-time monitoring and adjustment of the operating status of the membrane filter module, thereby enabling the filtration process to operate continuously within the set parameter range.

[0084] Furthermore, in step S6, the steps for executing the operation and maintenance management process through the control and maintenance module include: Operators shall conduct inspections and record operating parameters; The equipment technicians conduct inspections and check the status of critical equipment. Establish minimum inventory standards for critical spare parts; Record equipment operation, maintenance, and fault information into a full lifecycle archive; To achieve continuous operation and management of the process system.

[0085] Specifically, in this step, the operating parameters of the brine tank module, brine delivery pipeline module, and membrane filter module are centrally collected via the touchscreen PLC control unit. These operating parameters include pressure parameters collected by the remote pressure gauge 4 and liquid level parameters collected by the float level gauge 6. Simultaneously, the opening status of the pneumatic valve 5 and the pipeline operating status are recorded. The collected data is stored through the parameter recording unit and updated according to a set cycle.

[0086] Operators conduct system inspections at fixed time intervals, checking the internal operating status of the salt tank module, the delivery status of the DN750 square water pipe 3, and the operating status of the membrane filter module. The operating parameters obtained during the inspections are recorded in the system. In this solution, the operator's inspection cycle is preferably at least once per shift to ensure the continuity of operating data.

[0087] Equipment technicians conduct routine inspections of key equipment, including remote pressure gauges (4), float level gauges (6), pneumatic valves (5), and titanium pipelines (7). Inspections cover the connection status, signal output status, and execution status of the equipment. By checking these devices, it is confirmed that each component is in normal working order. In this plan, the preferred inspection cycle for equipment technicians is once daily.

[0088] During operation and maintenance management, inventory management is implemented for critical spare parts, including components such as pneumatic valves (5), remote pressure gauges (4), and float level gauges (6). Minimum inventory standards are established to ensure that the quantity of each type of critical spare part remains within a set range. In this plan, the inventory quantity of critical spare parts is preferably no less than one set to ensure timely replacement in case of equipment failure. Simultaneously, equipment operation information, maintenance records, and fault handling information are collected and entered into a full lifecycle archive. The archive records include information such as equipment operating time, parameter changes, maintenance time, and maintenance content, continuously recording to form a complete historical data of equipment operation.

[0089] Through the above operation and maintenance management process, continuous monitoring and management of the operating status of the salt tank module, brine delivery pipeline module and membrane filtration module are achieved, enabling continuous recording of system operation data, and maintaining equipment operating status through inspection and spare parts management, thereby achieving continuous operation of the process system.

[0090] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A process system for increasing the proportion of recycled salt used in the blending of raw salt, characterized in that, include: The salt dissolving tank module is used to achieve the mixing and dissolution of regenerated salt and salt water, and to perform an efficient dissolution process. The salt dissolving tank module is equipped with a vertical plate diversion and diversion structure inside, an arc-shaped baffle at the top, and a diversion cap inside. The brine delivery pipeline module is used to deliver the brine output from the salt dissolving tank module to the membrane filtration module and to perform the delivery process. The brine delivery pipeline module is a DN750 square pipe. The Kai membrane filtration module is used to filter the brine transported by the brine delivery pipeline module and to perform intelligent filtration control. The Kai membrane filtration module includes a remote pressure gauge, a float level gauge, a pneumatic valve, titanium pipeline, an intelligent early warning module, and a touch screen PLC control unit. The control and maintenance module is used for centralized control and operation management of the salt tank module, brine delivery pipeline module and membrane filtration module, and to execute the operation and maintenance management process. The modules are connected in the order of salt tank module, brine delivery pipeline module and KEM filter module, and are linked and controlled by DCS system. The KEM filter module adopts PLC + DCS collaborative control.

2. The process system for increasing the proportion of recycled salt used in the blending of raw salt according to claim 1, characterized in that, In the salt dissolving tank module, the steps for performing the efficient dissolution process include: The fluid entering the salt dissolving tank module is diverted and guided by the vertical plate diversion and diversion structure; The flow path of the fluid is changed by using an arc-shaped baffle to reduce local impact; The fluid is evenly distributed and the salt distribution is controlled by the flow divider cap; The aforementioned structural synergy extends the residence path of the salt in the dissolution zone and enhances the contact process between the salt and the brine.

3. The process system for increasing the proportion of recycled salt used in the blending of raw salt according to claim 1, characterized in that, In the brine delivery pipeline module, the steps for performing the delivery process include: Brine is transported using DN750 square pipes. Control the flow state of the brine solution within the pipeline; Reduce the scouring effect of undissolved salt particles on pipes and pump bodies; Reduce the crystallization and deposition of salt particles inside the pipe.

4. The process system for increasing the proportion of recycled salt used in the blending of raw salt according to claim 1, characterized in that, In the Kai membrane filtration module, the steps for executing the intelligent filtration control process include: Pressure parameters are collected using a remote pressure gauge. Liquid level parameters are collected using a float level gauge; The intelligent early warning module performs threshold judgments on pressure and liquid level parameters. An alarm signal is output when the detected value reaches the preset condition; The pneumatic valve is driven by the touch screen PLC control unit to perform linkage control.

5. The process system for increasing the proportion of recycled salt used in the blending of raw salt according to claim 1, characterized in that, In the Kai membrane filtration module, the steps for performing the intelligent filtration control process further include: Replace the flexible valve with a pneumatic valve as the actuator; Replace the pipeline with a titanium pipeline; The filtration system maintains its operation through the coordinated action of a remote pressure gauge, a float level gauge, a pneumatic valve, and titanium pipelines.

6. A process method for increasing the proportion of recycled salt used in the blending of raw salt, characterized in that, The process system for increasing the proportion of recycled salt used in the blending of raw salt as described in any one of claims 1-5 includes the following steps: S1. Add the recycled salt and raw salt into the salt dissolving tank module according to the preset mass ratio; S2. The salt dissolving tank module performs an efficient dissolution process, ensuring that the regenerated salt and the salt solution come into full contact and dissolve completely. S3. The dissolved brine is delivered to the membrane filtration module through the brine delivery pipeline module to perform a stable delivery process. S4. The intelligent filtration control process is executed through the Kai membrane filtration module to filter the brine and monitor and control the parameters. S5. The filtered brine is then transported to the electrolysis production unit. S6. The operation and maintenance management process is executed through the control and maintenance module to manage the operation of the process system.

7. The process method for increasing the proportion of recycled salt used in the blending of raw salt according to claim 6, characterized in that, In step S1, the step of adding the regenerated salt and the original salt into the salt dissolving tank module at a preset mass ratio includes: Screening of quality indicators for recycled salt; Metering control of raw salt; The recycled salt and raw salt are added to the salt dissolving tank module according to a fixed mass ratio; Ensure the stability of the raw material composition entering the salt dissolving tank module.

8. The process method for increasing the proportion of recycled salt used in the blending of raw salt according to claim 6, characterized in that, In step S2, the step of performing the efficient dissolution process through the salt dissolving tank module includes: The fluid is diverted and guided by a vertical plate diversion and diversion structure; The fluid flow path is changed by using an arc-shaped baffle; The salt is evenly distributed through the distribution cap; Control the residence path of the salt in the dissolution zone; This allows the salt to flow in a uniformly distributed manner within the dissolution zone.

9. The process method for increasing the proportion of recycled salt used in the blending of raw salt according to claim 6, characterized in that, In step S4, the step of performing the intelligent filtration control process through the Kai membrane filtration module includes: Collect pressure and liquid level parameters; Perform threshold determination on the parameters; An alarm signal is output when the detected value reaches the preset condition; The PLC drives the execution and interacts with the DCS system to achieve linkage control. Adjusting the operating status of the membrane filter module.

10. The process method for increasing the proportion of recycled salt used in the blending of raw salt according to claim 6, characterized in that, In step S6, the step of executing the operation and maintenance management process through the control and maintenance module includes: Operators shall conduct inspections and record operating parameters; The equipment technicians conduct inspections and check the status of critical equipment. Establish minimum inventory standards for critical spare parts; Record equipment operation, maintenance, and fault information into a full lifecycle archive; To achieve continuous operation and management of the process system.

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