Integrated extraction system and control method therefor

Abstract

An integrated extraction system and a control method therefor. The integrated extraction system comprises at least an extraction tank and a controller, wherein a first speed reducer (3) for adjusting the stirring of a stirrer and a second speed reducer (6) for adjusting the vertical movement of an aqueous-phase regulating tube are at least mounted in the extraction tank, the stirrer being arranged in a mixing tank (4) of the extraction tank, and the aqueous-phase regulating tube being arranged in a clarification tank (5) of the extraction tank; and the controller is configured to obtain a feed flow rate of the extraction tank, solution information of the clarification tank (5), and the stirring frequency of the stirrer, and perform PID control over the feed flow rate, the stirring frequency, and the position of the aqueous-phase regulating tube on the basis of the feed flow rate, the solution information and the stirring frequency. In this way, it is possible to realize automatic control of the extraction tank, reduce the interference of human factors, and improve the production line stability.

Description

An integrated extraction system and control method thereof Technical Field

[0001] The present application relates to the field of extraction technology, and in particular to an integrated extraction system and a control method thereof. Background Art

[0002] Extraction is a method of transferring a component from one solvent to another by utilizing the different solubilities or partition coefficients of a substance in two immiscible (or slightly soluble) solvents. Through repeated extractions, the vast majority of the active ingredients can be extracted.

[0003] In existing technologies, the operation of extraction tanks often requires long-term manual observation of changes in color, pH, and temperature, and adjustment of material flow based on these changes. This method is not only limited by operator experience, but also subject to significant human error. Furthermore, the need for constant manual monitoring results in low efficiency and high labor intensity, hindering the development of standardization, automation, and intelligent manufacturing within the enterprise.

[0004] Application Contents

[0005] The present application provides an integrated extraction system and a control method thereof to solve the problem in the prior art of requiring manual long-term observation of changes in color, pH value, and temperature, and adjusting the material flow rate according to these changes. The present application can improve the automation level of the extraction tank, reduce interference from human factors, and improve the stability of the production line.

[0006] To achieve the above objectives, an embodiment of the present application provides an integrated extraction system, which includes at least one extraction tank and a controller. The extraction tank is equipped with at least a first reducer for adjusting the stirring of the stirrer and a second reducer for adjusting the up and down movement of the water phase regulating tube. The stirring device is disposed in the mixing tank of the extraction tank, and the water phase regulating tube is disposed in the clarification tank of the extraction tank. The controller is configured as follows:

[0007] Obtaining the feed flow rate of the extraction tank, the solution information of the clarification tank, and the stirring frequency of the stirrer;

[0008] The feed flow rate, the solution information and the stirring frequency are controlled by PID on the feed flow rate, the stirring frequency and the position of the water phase regulating pipe.

[0009] As an improvement of the above solution, the solution information includes at least: water phase metal concentration, water phase pH value, water phase color, oil phase color, water phase liquid level, oil phase liquid level, total liquid level and solution temperature.

[0010] As an improvement to the above solution, the water phase regulating pipe and the second reducer are connected by a worm gear structure, and the water phase regulating pipe is driven to move up and down in the clarification tank by adjusting the number of rotations of the second reducer.

[0011] As an improvement to the above solution, the integrated extraction system comprises an extraction section, a washing section and a stripping section connected in series in sequence, and the saponification section, the extraction section, the washing section and the stripping section each comprise one or more extraction tanks connected in series;

[0012] The controller is further configured to:

[0013] For any of the extraction tanks, PID control is performed on the feed flow of the extraction tank, the stirring frequency of the agitator of the extraction tank, the position of the water phase regulating pipe of the extraction tank, the stirring frequency of the agitator of the next extraction tank connected in series with the extraction tank, and the position of the water phase regulating pipe of the next extraction tank connected in series with the extraction tank based on the feed flow of the extraction tank, the solution information of the clarification tank, and the stirring frequency of the agitator.

[0014] As an improvement to the above solution, the controller is further configured to:

[0015] Obtaining fitting change graphs, the fitting change graphs including: a fitting change graph of raffinate metal concentration versus pH value, a fitting change graph of stripping liquid metal concentration versus pH value, a fitting change graph of raffinate metal concentration versus water phase or oil phase color, a fitting change graph of stripping liquid metal concentration versus water phase or oil phase color, a fitting change graph of separation coefficient versus average temperature, and a fitting change graph of backwash ratio versus separation coefficient;

[0016] Optimal control conditions are screened out from the fitting change graph, and the stirring frequency and the position of the water phase regulating pipe are controlled according to the optimal control conditions.

[0017] As an improvement to the above solution, the controller is further configured to: perform at least one of a production safety adjustment operation, a quality adjustment operation, a process optimization adjustment operation, and an early warning adjustment operation;

[0018] The safety production adjustment operation includes: for any extraction tank, adjusting the stirring frequency of the stirrer of the extraction tank according to the total liquid level of the solution in the clarification tank of the extraction tank;

[0019] The quality adjustment operation includes: for any extraction tank, adjusting the feed flow rate of a feed pump connected to the extraction tank according to the metal concentration of the solution in the clarification tank of the extraction tank;

[0020] The process optimization and adjustment operation includes: adjusting the feed flow of the liquid alkali feed pump or the front liquid feed pump according to the saponification rate, and adjusting the feed flow of the acid wash feed pump according to the backwash ratio;

[0021] The operation of the early warning adjustment unit includes: adjusting the feed flow of the liquid alkali feed pump, the front liquid feed pump or the wash acid feed pump according to the water phase color, the oil phase color and the water phase pH value.

[0022] As an improvement to the above solution, the controller is further configured to:

[0023] Before performing a first adjustment operation, obtaining a second adjustment operation within a preset time period before the adjustment; the first adjustment operation is the production safety adjustment operation, the quality adjustment operation, the process optimization adjustment operation, or the early warning adjustment operation;

[0024] When the second adjustment operation is the same as the first adjustment operation, canceling the first adjustment operation;

[0025] When the second adjustment operation is opposite to the first adjustment operation, determining the current adjustment operation to be performed according to the adjustment priority;

[0026] The adjustment priorities are, from largest to smallest, adjustment operations for safe production adjustment, adjustment operations for quality adjustment, adjustment operations for process optimization adjustment, and adjustment operations for early warning adjustment.

[0027] As an improvement to the above solution, when the second adjustment operation is opposite to the first adjustment operation, determining the current adjustment operation to be performed according to the adjustment priority includes:

[0028] When the second adjustment operation is opposite to the first adjustment operation, if the priority of the second adjustment operation is greater than the priority of the first adjustment operation, the first adjustment operation is canceled; if the priority of the second adjustment operation is less than the priority of the first adjustment operation, the first adjustment operation is performed.

[0029] As an improvement of the above solution, the extraction tank includes: a feeding module, an extraction module and a detection module;

[0030] The detection end of the detection module is connected to each of the extraction modules and the feeding module, and the data output end of the detection module is connected to the data input end of the controller. The detection module is used to detect the feed flow rate of the extraction tank, the solution information of the clarification tank, the stirring frequency of the stirrer and the position of the water phase regulating tube, and send the detected information to the controller;

[0031] The control end of the controller is connected to the controlled end of each of the extraction modules and the controlled end of the feeding module;

[0032] The feeding module includes a feeding trough and a feeding pump, and the feeding trough is connected with the mixing tank through the feeding pump and a pipeline;

[0033] Each of the extraction modules includes: the mixing tank and the clarification tank, the mixing tank and the clarification tank are connected, the mixing tank is provided with an agitator, the stirring frequency of the agitator is adjusted by a first reducer, the clarification tank is provided with an oil phase outlet and a vertically arranged water phase regulating pipe that can move up and down, the water phase regulating pipe is provided with a water phase inlet and a water phase outlet, the water phase outlet is provided above the water phase inlet, the water phase in the clarification tank enters the water phase regulating pipe through the water phase inlet and flows out through the water phase outlet, and the water phase regulating pipe is adjusted to move up and down by a second reducer.

[0034] As an improvement to the above solution, the extraction section further includes a raffinate tank, the feed module of the extraction section is a front liquid feed module, the front liquid feed module includes a front liquid feed tank and a front liquid feed pump, the front liquid feed tank is connected to the mixing tank of the extraction tank of the extraction section through the front liquid feed pump and a pipeline, and the aqueous phase of the extraction section flows into the raffinate tank;

[0035] The feed module of the washing section is an acid washing feed module, which includes an acid washing feed tank and an acid washing feed pump. The acid washing feed tank is connected to the mixing tank of the extraction tank of the washing section through the acid washing feed pump and a pipeline;

[0036] The stripping section also includes a stripping liquid tank. The feed module of the stripping section is a stripping acid feed module. The stripping acid feed module includes a stripping acid feed tank and a stripping acid feed pump. The stripping acid feed tank is connected to the mixing tank of the extraction tank of the stripping section through the stripping acid feed pump and a pipeline. The aqueous phase of the stripping section flows into the stripping liquid tank.

[0037] As an improvement to the above solution, the integrated extraction system further comprises a saponification section, wherein the saponification section, the extraction section, the washing section and the stripping section are sequentially connected in series, and the saponification section comprises one or more extraction tanks connected in series;

[0038] The saponification section also includes a saponification water tank. The feeding module of the saponification section is a liquid alkali feeding module. The liquid alkali feeding module includes a liquid alkali feeding tank and a liquid alkali feeding pump. The liquid alkali feeding tank is connected to the mixing tank of the extraction tank of the saponification section through the liquid alkali feeding pump and a pipeline. The water phase of the saponification section flows into the saponification water tank.

[0039] As an improvement to the above solution, the stripping section is further connected in series with an anti-iron section and a clarification section, and the anti-iron section and the clarification section each include one or more extraction tanks connected in series;

[0040] The anti-ferroic section also includes an anti-ferroic liquid tank, the feeding module of the anti-ferroic section is an anti-ferric acid feeding module, the anti-ferroic acid feeding module includes an anti-ferroic acid feeding tank and an anti-ferroic acid feeding pump, the anti-ferroic acid feeding tank is connected to the mixing tank of the extraction tank of the anti-ferroic section through the anti-ferroic acid feeding pump and a pipeline, and the aqueous phase of the anti-ferroic section flows into the anti-ferroic liquid tank.

[0041] To achieve the above objectives, an embodiment of the present application further provides a control method for an integrated extraction system, wherein the integrated extraction system includes at least one extraction tank, wherein the extraction tank is equipped with at least a first reducer for regulating stirring of a stirrer and a second reducer for regulating the upward and downward movement of a water phase regulating tube, wherein the stirring device is disposed in a mixing tank of the extraction tank, and the water phase regulating tube is disposed in a clarifier tank of the extraction tank. The control method for the integrated extraction system includes:

[0042] Obtaining the feed flow rate of the extraction tank, the solution information of the clarification tank, and the stirring frequency of the stirrer;

[0043] The feed flow rate, the solution information and the stirring frequency are controlled by PID on the feed flow rate, the stirring frequency and the position of the water phase regulating pipe.

[0044] As an improvement of the above solution, the solution information includes at least: water phase metal concentration, water phase pH value, water phase color, oil phase color, water phase liquid level, oil phase liquid level, total liquid level and solution temperature.

[0045] As an improvement to the above solution, the water phase regulating pipe and the second reducer are connected by a worm gear structure, and the water phase regulating pipe is driven to move up and down in the clarification tank by adjusting the number of rotations of the second reducer.

[0046] Compared with the prior art, the integrated extraction system and control method provided in the embodiments of the present application perform PID control of the feed flow rate of the extraction tank, the solution information of the clarification tank and the stirring frequency of the agitator on the feed flow rate, stirring frequency and position of the water phase regulating tube, thereby realizing automatic control of the extraction tank, reducing interference from human factors and improving the stability of the production line. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] FIG1 is a flowchart of a controller of an integrated extraction system provided in an embodiment of the present application;

[0048] FIG2 is a structural diagram of an integrated extraction system provided in an embodiment of the present application;

[0049] FIG3 is another structural diagram of an integrated extraction system provided in an embodiment of the present application;

[0050] FIG4 is another structural diagram of an integrated extraction system provided in an embodiment of the present application.

[0051] Among them, 11, detection module; 12, feeding module; 13, extraction module; 1, feeding tank; 2, feeding pump; 3, first reducer; 4, mixing tank; 5, clarification tank; 6, second reducer. DETAILED DESCRIPTION

[0052] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0053] Referring to FIG1 , FIG1 is a flowchart of a controller of an integrated extraction system provided in an embodiment of the present application. The integrated extraction system includes at least one extraction tank and a controller. The extraction tank is equipped with at least a first reducer for adjusting the stirring of the stirrer and a second reducer for adjusting the up and down movement of the water phase regulating tube. The stirring device is provided in the mixing tank of the extraction tank, and the water phase regulating tube is provided in the clarification tank of the extraction tank. The controller is configured as follows:

[0054] S1. Obtaining the feed flow rate of the extraction tank, the solution information of the clarification tank, and the stirring frequency of the stirrer;

[0055] S2. Performing PID control on the feed flow rate, the solution information, and the stirring frequency, and the position of the water phase regulating pipe according to the feed flow rate, the stirring frequency, and the solution information.

[0056] In an optional embodiment, the solution information includes at least: water phase metal concentration, water phase pH value, water phase color, oil phase color, water phase liquid level, oil phase liquid level, total liquid level and solution temperature.

[0057] It can be understood that the solution information is detected by a concentration detection device, a pH detection device, a colorimetric device, a liquid level detection device, a flow detection device, and a temperature detection device;

[0058] The concentration detection device, pH detection device, and colorimetric device confirm the metal concentration in the aqueous or oil phase. The pH detection device and colorimetric device continuously monitor and provide the color and pH value of the solution to the control module. The colorimetric device can measure the height of the aqueous and oil phases in the clarification tank based on color differences and provide the data to the control module. The concentration detection device confirms the metal concentration through intermittent detection.

[0059] The concentration detection device includes: an online titration analysis device and an online element concentration detection device. The online titration analysis device is used to intermittently titrate the acidity of blank organic matter and the acidity of saponified organic matter. The online element concentration detection device is used to intermittently measure the concentration of target elements, such as Ni, Co, Mn, Ca, Mg, Zn, Li, Na, etc. The acidity and concentration data are provided to the control module, and the control module adjusts the material flow.

[0060] The color measuring device includes: a non-contact or contact online spectrophotometer, which uses the colorimeter to measure the height and color of the oil phase and the water phase, and provides the data to the control module.

[0061] The liquid level detection device can be a radar level meter. The liquid level detection device, temperature detection device, and flow detection device respectively detect the liquid level of the clarification tank, the feed temperature of all solutions, the temperature of each stage of the extraction tank, and the feed flow of all solutions, and provide the data to the control module.

[0062] In an optional embodiment, the water phase regulating pipe and the second reducer are connected by a worm gear structure, and the water phase regulating pipe is driven to move up and down in the clarification tank by adjusting the number of rotations of the second reducer.

[0063] In an optional embodiment, the integrated extraction system comprises an extraction section, a washing section and a stripping section connected in series, and the saponification section, the extraction section, the washing section and the stripping section each comprise one or more extraction tanks connected in series;

[0064] The controller is further configured to:

[0065] For any of the extraction tanks, PID control is performed on the feed flow of the extraction tank, the stirring frequency of the agitator of the extraction tank, the position of the water phase regulating pipe of the extraction tank, the stirring frequency of the agitator of the next extraction tank connected in series with the extraction tank, and the position of the water phase regulating pipe of the next extraction tank connected in series with the extraction tank based on the feed flow of the extraction tank, the solution information of the clarification tank, and the stirring frequency of the agitator.

[0066] In an optional embodiment, the controller is further configured to:

[0067] Obtaining fitting change graphs, the fitting change graphs including: a fitting change graph of raffinate metal concentration versus pH value, a fitting change graph of stripping liquid metal concentration versus pH value, a fitting change graph of raffinate metal concentration versus water phase or oil phase color, a fitting change graph of stripping liquid metal concentration versus water phase or oil phase color, a fitting change graph of separation coefficient versus average temperature, and a fitting change graph of backwash ratio versus separation coefficient;

[0068] Optimal control conditions are screened out from the fitting change graph, and the stirring frequency and the position of the water phase regulating pipe are controlled according to the optimal control conditions.

[0069] In an optional embodiment, the controller is further configured to: perform at least one adjustment operation among a production safety adjustment operation, a quality adjustment operation, a process optimization adjustment operation and an early warning adjustment operation;

[0070] The safety production adjustment operation includes: for any extraction tank, adjusting the stirring frequency of the stirrer of the extraction tank according to the total liquid level of the solution in the clarification tank of the extraction tank;

[0071] The quality adjustment operation includes: for any extraction tank, adjusting the feed flow rate of a feed pump connected to the extraction tank according to the metal concentration of the solution in the clarification tank of the extraction tank;

[0072] The process optimization and adjustment operation includes: adjusting the feed flow of the liquid alkali feed pump or the front liquid feed pump according to the saponification rate, and adjusting the feed flow of the acid wash feed pump according to the backwash ratio;

[0073] The operation of the early warning adjustment unit includes: adjusting the feed flow of the liquid alkali feed pump, the front liquid feed pump or the wash acid feed pump according to the water phase color, the oil phase color and the water phase pH value.

[0074] In an optional embodiment, the controller is further configured to:

[0075] Before performing a first adjustment operation, obtaining a second adjustment operation within a preset time period before the adjustment; the first adjustment operation is the production safety adjustment operation, the quality adjustment operation, the process optimization adjustment operation, or the early warning adjustment operation;

[0076] When the second adjustment operation is the same as the first adjustment operation, canceling the first adjustment operation;

[0077] When the second adjustment operation is opposite to the first adjustment operation, determining the current adjustment operation to be performed according to the adjustment priority;

[0078] The adjustment priorities are, from largest to smallest, adjustment operations for safe production adjustment, adjustment operations for quality adjustment, adjustment operations for process optimization adjustment, and adjustment operations for early warning adjustment.

[0079] It is understood that the safety production adjustment operations described above are prioritized and are adjusted based on safety control parameters for safe and stable production. This includes increasing or decreasing the frequency of the next level when the total liquid level exceeds the control range. If the frequency reaches the upper limit or two or more high liquid level alarms occur, the flow rates of the pre-liquid and organic phase are proportionally decreased. When the temperature exceeds the control range, the flow rates of the pre-liquid and organic phase are proportionally decreased. When the saponification rate exceeds the control range, the circulating organic flow rate is increased. If the organic flow rate reaches the upper limit, the liquid caustic soda flow rate is decreased. When the oil and water levels exceed the control range, the aqueous phase adjustment lever is raised or lowered.

[0080] The quality adjustment operation is the second priority adjustment part, which is adjusted according to product demand, including adjusting the flow rates of fore liquor, organic, acid and alkali according to the metal content of raffinate and strip liquor.

[0081] The process optimization adjustment operation is to optimize system regulation and make adjustments based on process optimization control parameters to ensure production costs. This includes increasing the circulating organic flow rate when the saponification rate exceeds the control range. If the organic flow rate reaches the upper limit, the liquid caustic soda flow rate is reduced. If the backwash ratio exceeds or falls below the control range, the acid wash flow rate is reduced or increased. If the oil and water levels exceed the control range, the aqueous phase adjustment lever is raised or lowered.

[0082] The early warning adjustment operation is based on the early warning control parameters, including the color and pH changes, the advance liquid or acid and alkali flow rate is increased or decreased in advance. The early warning adjustment priority order is the color measuring device, then the pH meter.

[0083] In an optional embodiment, when the second adjustment operation is opposite to the first adjustment operation, determining the current adjustment operation to be performed according to the adjustment priority includes:

[0084] When the second adjustment operation is opposite to the first adjustment operation, if the priority of the second adjustment operation is greater than the priority of the first adjustment operation, the first adjustment operation is canceled; if the priority of the second adjustment operation is less than the priority of the first adjustment operation, the first adjustment operation is performed.

[0085] As shown in FIG2-FIG3, the extraction tank includes: a feeding module 12, an extraction module 13 and a detection module 11;

[0086] The detection end of the detection module 11 is connected to each of the extraction modules 13 and the feeding module 12, and the data output end of the detection module 11 is connected to the data input end of the controller. The detection module 11 is used to detect the feed flow rate of the extraction tank, the solution information of the clarification tank 5, the stirring frequency of the stirrer and the position of the water phase regulating tube, and send the detected information to the controller;

[0087] The control end of the controller is connected to the controlled end of each of the extraction modules 13 and the controlled end of the feeding module 12;

[0088] The feeding module 12 includes a feeding tank 1 and a feeding pump 2, and the feeding tank 1 is connected to the mixing tank 4 through the feeding pump 2 and a pipeline;

[0089] Each of the extraction modules 13 includes: the mixing tank 4 and the clarification tank 5. The mixing tank 4 and the clarification tank 5 are connected. The mixing tank 4 is provided with an agitator. The stirring frequency of the agitator is adjusted by the first reducer 3. The clarification tank 5 is provided with an oil phase outlet and a vertically arranged water phase regulating pipe that can move up and down. The water phase regulating pipe is provided with a water phase inlet and a water phase outlet. The water phase outlet is provided above the water phase inlet. The water phase in the clarification tank 5 enters the water phase regulating pipe through the water phase inlet and flows out through the water phase outlet. The water phase regulating pipe is adjusted to move up and down by the second reducer 6.

[0090] It is understood that the stirring frequency is changed by controlling the rotation of the agitator blades via the first reducer 3. The mixing tank 4 is connected to the next-level clarification tank 5 via a pipeline. The agitation of the reducer in the mixing tank 4 has suction, and the flow rate in the pipeline can be controlled by adjusting the reducer frequency, thereby controlling the liquid level in the clarification tank 5. The water phase regulating pipe is connected to the second reducer 6. The water phase regulating pipe and the second reducer 6 are connected using a worm gear structure. The number of rotations of the second reducer 6 is adjusted to drive the water phase regulating pipe up and down, thereby controlling the height of the oil phase and water phase in the clarification tank 5. The controller changes the stirring frequency of the agitator and the position of the water phase regulating pipe through PID control, thereby changing the feed flow rate, rotation speed, etc., and controlling parameters such as color, metal concentration, or liquid level at set values.

[0091] In an optional embodiment, the extraction section further includes a raffinate tank, the feed module of the extraction section is a front liquid feed module, the front liquid feed module includes a front liquid feed tank and a front liquid feed pump, the front liquid feed tank is connected to the mixing tank of the extraction tank of the extraction section through the front liquid feed pump and a pipeline, and the aqueous phase of the extraction section flows into the raffinate tank;

[0092] The feed module of the washing section is an acid washing feed module, which includes an acid washing feed tank and an acid washing feed pump. The acid washing feed tank is connected to the mixing tank of the extraction tank of the washing section through the acid washing feed pump and a pipeline;

[0093] The stripping section further includes a stripping liquid tank, and the feed module of the stripping section is a stripping acid feed module. The stripping acid feed module includes a stripping acid feed tank and a stripping acid feed pump. The stripping acid feed tank is connected to the mixing tank of the extraction tank of the stripping section through the stripping acid feed pump and a pipeline, and the aqueous phase of the stripping section flows into the stripping liquid tank;

[0094] In an optional embodiment, the integrated extraction system further comprises a saponification section, wherein the saponification section, the extraction section, the washing section and the stripping section are sequentially connected in series, and the saponification section comprises one or more extraction tanks connected in series;

[0095] The saponification section also includes a saponification water tank. The feeding module of the saponification section is a liquid alkali feeding module. The liquid alkali feeding module includes a liquid alkali feeding tank and a liquid alkali feeding pump. The liquid alkali feeding tank is connected to the mixing tank of the extraction tank of the saponification section through the liquid alkali feeding pump and a pipeline. The water phase of the saponification section flows into the saponification water tank.

[0096] In an optional embodiment, the stripping section is further connected in series with an anti-iron section and a clarification section, and the anti-iron section and the clarification section each include one or more extraction tanks connected in series;

[0097] The anti-ferroic section also includes an anti-ferroic liquid tank, the feeding module of the anti-ferroic section is an anti-ferric acid feeding module, the anti-ferroic acid feeding module includes an anti-ferroic acid feeding tank and an anti-ferroic acid feeding pump, the anti-ferroic acid feeding tank is connected to the mixing tank of the extraction tank of the anti-ferroic section through the anti-ferroic acid feeding pump and a pipeline, and the aqueous phase of the anti-ferroic section flows into the anti-ferroic liquid tank.

[0098] For example, as shown in Figure 4, the integrated extraction system provided in an embodiment of the present application includes a saponification section, an extraction section, a washing section, a stripping section, an anti-iron section and a clarification section connected in series in sequence, wherein each stage of the extraction tank includes 1 saponification stage, 4 extraction stages, 2 washing stages, 3 stripping stages, 2 anti-iron stages and 1 clarification stage.

[0099] The present application also provides a control method for an integrated extraction system, the integrated extraction system comprising at least one extraction tank, the extraction tank being equipped with at least a first reducer for regulating stirring of a stirrer and a second reducer for regulating the upward and downward movement of a water phase regulating tube, the stirring device being disposed in a mixing tank of the extraction tank, and the water phase regulating tube being disposed in a clarifier tank of the extraction tank. The control method for the integrated extraction system comprises:

[0100] Obtaining the feed flow rate of the extraction tank, the solution information of the clarification tank, and the stirring frequency of the stirrer;

[0101] The feed flow rate, the solution information and the stirring frequency are controlled by PID on the feed flow rate, the stirring frequency and the position of the water phase regulating pipe.

[0102] Optionally, the solution information includes at least: water phase metal concentration, water phase pH value, water phase color, oil phase color, water phase liquid level, oil phase liquid level, total liquid level and solution temperature.

[0103] Optionally, the water phase regulating pipe and the second reducer are connected via a worm gear structure, and the water phase regulating pipe is driven to move up and down in the clarification tank by adjusting the number of rotations of the second reducer.

[0104] Optionally, the integrated extraction system comprises an extraction section, a washing section and a stripping section connected in series, and the saponification section, the extraction section, the washing section and the stripping section each comprise one or more extraction tanks connected in series;

[0105] The control method of the integrated extraction system further includes:

[0106] For any of the extraction tanks, PID control is performed on the feed flow of the extraction tank, the stirring frequency of the agitator of the extraction tank, the position of the water phase regulating pipe of the extraction tank, the stirring frequency of the agitator of the next extraction tank connected in series with the extraction tank, and the position of the water phase regulating pipe of the next extraction tank connected in series with the extraction tank based on the feed flow of the extraction tank, the solution information of the clarification tank, and the stirring frequency of the agitator.

[0107] Optionally, the control method of the integrated extraction system further includes:

[0108] Obtaining fitting change graphs, the fitting change graphs including: a fitting change graph of raffinate metal concentration versus pH value, a fitting change graph of stripping liquid metal concentration versus pH value, a fitting change graph of raffinate metal concentration versus water phase or oil phase color, a fitting change graph of stripping liquid metal concentration versus water phase or oil phase color, a fitting change graph of separation coefficient versus average temperature, and a fitting change graph of backwash ratio versus separation coefficient;

[0109] Optimal control conditions are screened out from the fitting change graph, and the stirring frequency and the position of the water phase regulating pipe are controlled according to the optimal control conditions.

[0110] Optionally, the control method of the integrated extraction system further comprises: performing at least one adjustment operation among a production safety adjustment operation, a quality adjustment operation, a process optimization adjustment operation, and an early warning adjustment operation;

[0111] The safety production adjustment operation includes: for any extraction tank, adjusting the stirring frequency of the stirrer of the extraction tank according to the total liquid level of the solution in the clarification tank of the extraction tank;

[0112] The quality adjustment operation includes: for any extraction tank, adjusting the feed flow rate of a feed pump connected to the extraction tank according to the metal concentration of the solution in the clarification tank of the extraction tank;

[0113] The process optimization and adjustment operation includes: adjusting the feed flow of the liquid alkali feed pump or the front liquid feed pump according to the saponification rate, and adjusting the feed flow of the acid wash feed pump according to the backwash ratio;

[0114] The operation of the early warning adjustment unit includes: adjusting the feed flow of the liquid alkali feed pump, the front liquid feed pump or the wash acid feed pump according to the water phase color, the oil phase color and the water phase pH value.

[0115] Optionally, the control method of the integrated extraction system further includes:

[0116] Before performing a first adjustment operation, obtaining a second adjustment operation within a preset time period before the adjustment; the first adjustment operation is the production safety adjustment operation, the quality adjustment operation, the process optimization adjustment operation, or the early warning adjustment operation;

[0117] When the second adjustment operation is the same as the first adjustment operation, canceling the first adjustment operation;

[0118] When the second adjustment operation is opposite to the first adjustment operation, determining the current adjustment operation to be performed according to the adjustment priority;

[0119] The adjustment priorities are, from largest to smallest, adjustment operations for safe production adjustment, adjustment operations for quality adjustment, adjustment operations for process optimization adjustment, and adjustment operations for early warning adjustment.

[0120] Optionally, when the second adjustment operation is opposite to the first adjustment operation, determining the current adjustment operation to be performed according to the adjustment priority includes:

[0121] When the second adjustment operation is opposite to the first adjustment operation, if the priority of the second adjustment operation is greater than the priority of the first adjustment operation, the first adjustment operation is canceled; if the priority of the second adjustment operation is less than the priority of the first adjustment operation, the first adjustment operation is performed.

[0122] Optionally, the extraction tank includes: a feeding module, an extraction module and a detection module;

[0123] The detection end of the detection module is connected to each of the extraction modules and the feeding module, and the data output end of the detection module is connected to the data input end of the controller of the integrated extraction system. The detection module is used to detect the feed flow rate of the extraction tank, the solution information of the clarification tank, the stirring frequency of the stirrer and the position of the water phase regulating tube, and send the detected information to the controller;

[0124] The control end of the controller is connected to the controlled end of each of the extraction modules and the controlled end of the feeding module;

[0125] The feeding module includes a feeding trough and a feeding pump, and the feeding trough is connected with the mixing tank through the feeding pump and a pipeline;

[0126] Each of the extraction modules includes: the mixing tank and the clarification tank, the mixing tank and the clarification tank are connected, the mixing tank is provided with an agitator, the stirring frequency of the agitator is adjusted by a first reducer, the clarification tank is provided with an oil phase outlet and a vertically arranged water phase regulating pipe that can move up and down, the water phase regulating pipe is provided with a water phase inlet and a water phase outlet, the water phase outlet is provided above the water phase inlet, the water phase in the clarification tank enters the water phase regulating pipe through the water phase inlet and flows out through the water phase outlet, and the water phase regulating pipe is adjusted to move up and down by a second reducer.

[0127] Optionally, the extraction section further includes a raffinate tank, the feed module of the extraction section is a front liquid feed module, the front liquid feed module includes a front liquid feed tank and a front liquid feed pump, the front liquid feed tank is connected to the mixing tank of the extraction tank of the extraction section through the front liquid feed pump and a pipeline, and the aqueous phase of the extraction section flows into the raffinate tank;

[0128] The feed module of the washing section is an acid washing feed module, which includes an acid washing feed tank and an acid washing feed pump. The acid washing feed tank is connected to the mixing tank of the extraction tank of the washing section through the acid washing feed pump and a pipeline;

[0129] The stripping section also includes a stripping liquid tank. The feed module of the stripping section is a stripping acid feed module. The stripping acid feed module includes a stripping acid feed tank and a stripping acid feed pump. The stripping acid feed tank is connected to the mixing tank of the extraction tank of the stripping section through the stripping acid feed pump and a pipeline. The aqueous phase of the stripping section flows into the stripping liquid tank.

[0130] Optionally, the integrated extraction system further comprises a saponification section, wherein the saponification section, the extraction section, the washing section and the stripping section are sequentially connected in series, and the saponification section comprises one or more extraction tanks connected in series;

[0131] The saponification section also includes a saponification water tank. The feeding module of the saponification section is a liquid alkali feeding module. The liquid alkali feeding module includes a liquid alkali feeding tank and a liquid alkali feeding pump. The liquid alkali feeding tank is connected to the mixing tank of the extraction tank of the saponification section through the liquid alkali feeding pump and a pipeline. The water phase of the saponification section flows into the saponification water tank.

[0132] Optionally, the stripping section is further connected in series with an anti-iron section and a clarification section, and the anti-iron section and the clarification section each include one or more extraction tanks connected in series;

[0133] The anti-ferroic section also includes an anti-ferroic liquid tank, the feeding module of the anti-ferroic section is an anti-ferric acid feeding module, the anti-ferroic acid feeding module includes an anti-ferroic acid feeding tank and an anti-ferroic acid feeding pump, the anti-ferroic acid feeding tank is connected to the mixing tank of the extraction tank of the anti-ferroic section through the anti-ferroic acid feeding pump and a pipeline, and the aqueous phase of the anti-ferroic section flows into the anti-ferroic liquid tank.

[0134] Compared with the prior art, the integrated extraction system and control method provided in the embodiments of the present application have the following beneficial effects:

[0135] 1. Reduce the interference of human factors, automatically fit and adjust data according to the test data, optimize the production line process parameters, effectively improve product quality, increase production capacity, and reduce auxiliary material costs.

[0136] 2. Use concentration detection devices, pH detection devices, colorimetric devices, liquid level detection devices, flow detection devices, and temperature detection devices to detect various parameters of the extraction tank, thereby reducing manual monitoring intensity and lowering labor costs.

[0137] 3. High work efficiency, easy to manage, and improve enterprise production efficiency.

[0138] 4. Reducing the harm of extraction agents to workers is conducive to reducing safety hazards in enterprises and reducing the occurrence of occupational diseases.

[0139] The above is a preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications are also considered to be within the scope of protection of the present application.

Claims

1. An integrated extraction system, characterized in that: The integrated extraction system comprises at least one extraction tank and a controller, wherein the extraction tank is at least equipped with a first reducer for adjusting the stirring of the stirrer and a second reducer for adjusting the up and down movement of the water phase regulating tube, the stirring device is arranged in the mixing tank of the extraction tank, the water phase regulating tube is arranged in the clarification tank of the extraction tank, and the controller is configured as follows: Obtaining the feed flow rate of the extraction tank, the solution information of the clarification tank, and the stirring frequency of the stirrer; According to the feed flow rate, the solution information and the stirring frequency, PID control is performed on the feed flow rate, the stirring frequency and the position of the water phase regulating pipe.

2. The integrated extraction system according to claim 1, characterized in that: The solution information includes at least: water phase metal concentration, water phase pH value, water phase color, oil phase color, water phase liquid level, oil phase liquid level, total liquid level and solution temperature.

3. The integrated extraction system according to claim 1, characterized in that: The water phase regulating pipe and the second reducer are connected via a worm gear structure, and the water phase regulating pipe is driven to move up and down in the clarification tank by adjusting the number of rotations of the second reducer.

4. The integrated extraction system according to claim 1, characterized in that: The integrated extraction system comprises an extraction section, a washing section and a stripping section connected in series in sequence, and the saponification section, the extraction section, the washing section and the stripping section each comprise one or more extraction tanks connected in series; The controller is also configured to: For any of the extraction tanks, PID control is performed on the feed flow of the extraction tank, the stirring frequency of the agitator of the extraction tank, the position of the water phase regulating pipe of the extraction tank, the stirring frequency of the agitator of the next extraction tank connected in series with the extraction tank, and the position of the water phase regulating pipe of the next extraction tank connected in series with the extraction tank based on the feed flow of the extraction tank, the solution information of the clarification tank and the stirring frequency of the agitator.

5. The integrated extraction system according to claim 4, characterized in that: The controller is also configured to: Obtaining a fitting change graph, the fitting change graph comprising: a fitting change graph of raffinate metal concentration versus pH value, a fitting change graph of stripping liquid metal concentration versus pH value, a fitting change graph of raffinate metal concentration versus water phase or oil phase color, a fitting change graph of stripping liquid metal concentration versus water phase or oil phase color, a fitting change graph of separation coefficient versus average temperature, and a fitting change graph of backwash ratio versus separation coefficient; The optimal control condition is selected from the fitting change diagram, and the stirring frequency and the position of the water phase regulating tube are controlled according to the optimal control condition.

6. The integrated extraction system according to claim 4, characterized in that: The controller is further configured to: perform at least one of a production safety adjustment operation, a quality adjustment operation, a process optimization adjustment operation, and an early warning adjustment operation; Wherein, the safety production adjustment operation includes: for any extraction tank, adjusting the stirring frequency of the stirrer of the extraction tank according to the total liquid level of the solution in the clarification tank of the extraction tank; The quality adjustment operation includes: for any extraction tank, adjusting the feed flow rate of a feed pump connected to the extraction tank according to the metal concentration of the solution in the clarification tank of the extraction tank; The process optimization and adjustment operation includes: adjusting the feed flow rate of the liquid alkali feed pump or the front liquid feed pump according to the saponification rate, and adjusting the feed flow rate of the wash acid feed pump according to the backwash ratio; The operation of the early warning adjustment unit includes: adjusting the feed flow of the liquid alkali feed pump, the front liquid feed pump or the wash acid feed pump according to the water phase color, the oil phase color and the water phase pH value.

7. The integrated extraction system according to claim 6, characterized in that: The controller is also configured to: Before the first adjustment operation is currently to be performed, a second adjustment operation within a preset time period before the adjustment is obtained; the first adjustment operation is the safe production adjustment operation, the quality adjustment operation, the process optimization adjustment operation or the early warning adjustment operation; When the second adjustment operation is the same as the first adjustment operation, canceling the first adjustment operation; When the second adjustment operation is opposite to the first adjustment operation, determining the adjustment operation to be performed currently according to the adjustment priority; The adjustment priorities are, from high to low, adjustment operations for safe production adjustment, adjustment operations for quality adjustment, adjustment operations for process optimization adjustment, and adjustment operations for early warning adjustment.

8. The integrated extraction system according to claim 7, characterized in that: When the second adjustment operation is opposite to the first adjustment operation, determining the current adjustment operation to be performed according to the adjustment priority includes: When the second adjustment operation is opposite to the first adjustment operation, if the priority of the second adjustment operation is greater than that of the first adjustment operation, the first adjustment operation is canceled; if the priority of the second adjustment operation is less than that of the first adjustment operation, the first adjustment operation is executed.

9. The integrated extraction system according to claim 1, characterized in that: The extraction tank comprises: a feeding module, an extraction module and a detection module; The detection end of the detection module is connected to each of the extraction modules and the feeding module, and the data output end of the detection module is connected to the data input end of the controller. The detection module is used to detect the feed flow rate of the extraction tank, the solution information of the clarification tank, the stirring frequency of the stirrer and the position of the water phase regulating tube, and send the detected information to the controller; The control end of the controller is connected to the controlled end of each of the extraction modules and the controlled end of the feeding module; The feed module comprises a feed tank and a feed pump, and the feed tank is connected with the mixing tank through the feed pump and a pipeline; Each of the extraction modules comprises: a mixing tank and a clarification tank, wherein the mixing tank is connected to the clarification tank, the mixing tank is provided with a stirrer, the stirring frequency of the stirrer is adjusted by a first reducer, the clarification tank is provided with an oil phase outlet and a vertically arranged and up-and-down movable water phase regulating pipe, The water phase regulating pipe is provided with a water phase inlet and a water phase outlet, wherein the water phase outlet is arranged above the water phase inlet, and the water phase in the clarification tank enters the water phase regulating pipe through the water phase inlet and flows out through the water phase outlet, and the water phase regulating pipe is adjusted to move up and down by the second reducer.

10. The integrated extraction system according to claim 4, characterized in that: The extraction section also includes a raffinate tank, the feed module of the extraction section is a front liquid feed module, the front liquid feed module includes a front liquid feed tank and a front liquid feed pump, the front liquid feed tank is connected to the mixing tank of the extraction tank of the extraction section through the front liquid feed pump and a pipeline, and the water phase of the extraction section flows into the raffinate tank; The feed module of the washing section is an acid washing feed module, which includes an acid washing feed tank and an acid washing feed pump, and the acid washing feed tank is connected to the mixing tank of the extraction tank of the washing section through the acid washing feed pump and a pipeline; The stripping section also includes a stripping liquid tank, and the feed module of the stripping section is a stripping acid feed module. The stripping acid feed module includes a stripping acid feed tank and a stripping acid feed pump. The stripping acid feed tank is connected to the mixing tank of the extraction tank of the stripping section through the stripping acid feed pump and a pipeline, and the water phase of the stripping section flows into the stripping liquid tank.

11. The integrated extraction system according to claim 10, characterized in that: The integrated extraction system further comprises a saponification section, wherein the saponification section, the extraction section, the washing section and the stripping section are sequentially connected in series, and the saponification section comprises one or more extraction tanks connected in series; The saponification section also includes a saponification water tank. The feeding module of the saponification section is a liquid alkali feeding module. The liquid alkali feeding module includes a liquid alkali feeding tank and a liquid alkali feeding pump. The liquid alkali feeding tank is connected to the mixing tank of the extraction tank of the saponification section through the liquid alkali feeding pump and a pipeline, and the water phase of the saponification section flows into the saponification water tank.

12. The integrated extraction system according to claim 11, characterized in that: The stripping section is also connected in series with an anti-iron section and a clarification section, and the anti-iron section and the clarification section each include one or more extraction tanks connected in series; The anti-ferroic section also includes an anti-ferroic liquid tank. The feeding module of the anti-ferroic section is an anti-ferric acid feeding module. The anti-ferroic acid feeding module includes an anti-ferroic acid feeding tank and an anti-ferroic acid feeding pump. The anti-ferroic acid feeding tank is connected to the mixing tank of the extraction tank of the anti-ferroic section through the anti-ferroic acid feeding pump and a pipeline, and the water phase of the anti-ferroic section flows into the anti-ferroic liquid tank.

13. A control method for an integrated extraction system, characterized in that: The integrated extraction system comprises at least one extraction tank, the extraction tank is equipped with at least a first reducer for adjusting the stirring of the stirrer and a second reducer for adjusting the up and down movement of the water phase regulating tube, the stirring device is arranged in the mixing tank of the extraction tank, the water phase regulating tube is arranged in the clarification tank of the extraction tank, and the control method of the integrated extraction system comprises: Obtaining the feed flow rate of the extraction tank, the solution information of the clarification tank, and the stirring frequency of the stirrer; According to the feed flow rate, the solution information and the stirring frequency, PID control is performed on the feed flow rate, the stirring frequency and the position of the water phase regulating pipe.

14. The control method of the integrated extraction system according to claim 13, characterized in that: The solution information includes at least: water phase metal concentration, water phase pH value, water phase color, oil phase color, water phase liquid level, oil phase liquid level, total liquid level and solution temperature.

15. The control method of the integrated extraction system according to claim 13, characterized in that: The water phase regulating pipe and the second reducer are connected via a worm gear structure, and the water phase regulating pipe is driven to move up and down in the clarification tank by adjusting the number of rotations of the second reducer.

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