Filter press equipment

Abstract

This utility model provides a filter press device, comprising: a filter press tank with a first storage chamber inside; an air compressor connected to the filter press tank via a first pipeline to connect the first storage chamber and the interior of the air compressor; a stirring assembly rotatably mounted on the filter press tank and extending into the first storage chamber; a filter element disposed in the first storage chamber and located below the stirring assembly; a sampling tank with a second storage chamber inside, the filter press tank connected to the sampling tank via a second pipeline to connect the first and second storage chambers, the connection point of the second pipeline to the filter press tank being located below the filter element; and a detection device mounted on the sampling tank and extending into the second storage chamber. The technical solution of this application effectively solves the problem of poor online detection accuracy of parameters such as the density of the mother liquor in related technologies' filter equipment.

Description

Technical Field

[0001] This utility model relates to the field of filter press equipment technology, and more specifically, to a filter press equipment. Background Technology

[0002] In the potash fertilizer production sector, filtration equipment plays a crucial role. Related technologies primarily rely on gravity to force the liquid portion of the slurry through the filter medium, separating solid particles from the liquid and thus achieving preliminary purification and upgrading of the mother liquor. This process is irreplaceable in reducing the load on subsequent processes and optimizing product quality.

[0003] However, most filtration equipment in related technologies employs passive filtration and lacks the capability for online real-time detection of parameters such as the density of the mother liquor. Passive filtration involves the slurry flowing naturally through the filter cloth under gravity. The main reason for this lack of online real-time detection is that the complex characteristics of high-concentration slurries place higher demands on the filtration and measurement mechanisms of the equipment. Due to the uneven distribution of solid particles in high-concentration slurries, the accuracy of online detection of parameters such as the density of the mother liquor is poor, requiring subsequent processes to obtain more accurate measurement results.

[0004] Therefore, the filtration equipment in related technologies suffers from poor accuracy in online detection of parameters such as the density of the mother liquor. Utility Model Content

[0005] The main objective of this invention is to provide a pressure filtration device to solve the problem of poor accuracy in online detection of parameters such as the density of mother liquor in related filtration devices.

[0006] To achieve the above objectives, this utility model provides a filter press device, comprising: a filter press tank, wherein a first storage chamber is provided inside the filter press tank; an air compressor, wherein the air compressor is connected to the filter press tank via a first pipeline to connect the first storage chamber and the interior of the air compressor; a stirring assembly, which is rotatably mounted on the filter press tank and extends into the first storage chamber; a filter element, which is disposed in the first storage chamber and located below the stirring assembly; a sampling tank, wherein a second storage chamber is provided inside the sampling tank, and the filter press tank is connected to the sampling tank via a second pipeline to connect the first storage chamber and the second storage chamber, wherein the connection point of the second pipeline and the filter press tank is located below the filter element; and a detection device, which is mounted on the sampling tank and extends into the second storage chamber.

[0007] Furthermore, the connection between the first pipeline and the filter press is located on the top surface of the filter press, and / or, a first air inlet valve is provided on the first pipeline.

[0008] Furthermore, the air compressor is also connected to the filter press tank via a third pipeline to connect the first storage chamber and the interior of the air compressor; the connection point between the third pipeline and the filter press tank is located below the filter element; and / or, a second air intake valve is provided on the third pipeline.

[0009] Furthermore, the filter press equipment also includes a pressure detection element, which is installed on the filter press tank and extends into the first storage chamber.

[0010] Furthermore, the sampling container includes a first cylindrical body and a first conical body communicating with the first cylindrical body. The first cylindrical body is located above the first conical body, and the first conical body has a first conical cavity. The diameter of the first conical cavity gradually decreases from top to bottom, and the inner cavity of the first cylindrical body and the first conical cavity form a second storage cavity.

[0011] Furthermore, the detection device includes a density measuring element, a temperature measuring element, and a conductivity measuring element, which are spaced apart on the first cone and extend into the first conical cavity.

[0012] Furthermore, the detection device includes a liquid level sensor, which is disposed at the upper end of the first cylinder and extends into the inner cavity of the first cylinder.

[0013] Furthermore, the filter press also includes a drain pipe, which is connected to the first storage chamber, and the connection between the drain pipe and the filter press tank is located above the filter element; and / or, there are two filter press tanks, both of which are connected to the sampling tank.

[0014] Furthermore, the filter press includes a second cylindrical body and a second cone body communicating with the second cylindrical body. The second cylindrical body is located above the second cone body, and the second cone body has a second conical cavity that gradually decreases in size from top to bottom. The inner cavity of the second cylindrical body and the second conical cavity form a second storage cavity.

[0015] Furthermore, the stirring assembly is rotatably disposed within the inner cavity of the second cylinder, the filter element is disposed within the inner cavity of the second cylinder; and / or, the connection between the second pipeline and the filter press is disposed on the second cone.

[0016] The filter press equipment, utilizing the technical solution of this utility model, includes: a filter press tank, an air compressor, a stirring assembly, a filter element, and a sampling tank. The filter press tank has a first storage chamber. The air compressor is connected to the filter press tank via a first pipeline, connecting the first storage chamber and the interior of the air compressor. The stirring assembly is rotatably mounted on the filter press tank and extends into the first storage chamber. The filter element is located in the first storage chamber and below the stirring assembly. The sampling tank has a second storage chamber, and the filter press tank is connected to the sampling tank via a second pipeline, connecting the first and second storage chambers. The connection point of the second pipeline to the filter press tank is located below the filter element. A detection device is mounted on the sampling tank and extends into the second storage chamber. Thus, the filter press tank has a first storage chamber, and the air compressor is connected to the filter press tank via the first pipeline, enabling the air compressor to provide pressure to the slurry in the first storage chamber, achieving active filtration of the slurry, improving the filtration speed and efficiency, and reducing residual impurities. The sampling tank and the filter press are connected via a second pipeline. The inlet of the second pipeline is located below the filter element, ensuring that the second storage chamber in the sampling tank receives effectively filtered mother liquor. This mother liquor contains fewer and more uniformly distributed solid particles, thus improving the detection accuracy of the testing device. Furthermore, the design of the testing device allows the mother liquor obtained after slurry filtration to enter the sampling tank and be detected online in real time and accurately, reducing the problem of poor detection accuracy caused by the uneven distribution of solid particles in high-concentration slurry. Therefore, the technical solution of this application effectively solves the problem of poor online detection accuracy of parameters such as the density of mother liquor in related technologies. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0018] Figure 1 A schematic diagram of an embodiment of the filter press according to the present invention is shown.

[0019] The above figures include the following reference numerals:

[0020] 10. Filter press; 11. Second cylinder; 12. Second cone;

[0021] 20. Air compressor;

[0022] 30. Stirring assembly;

[0023] 40. Filter components;

[0024] 50. Sampling container; 51. First cylindrical body; 52. First cone;

[0025] 61. Density measuring device; 62. Temperature measuring device; 63. Conductivity measuring device; 64. Liquid level sensor;

[0026] 71. First pipeline; 711. First intake valve; 72. Second pipeline; 73. Third pipeline; 731. Second intake valve;

[0027] 81. Sewage pipe; 82. Pressure testing device. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0029] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0030] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0031] In this embodiment, the filter press equipment includes: a filter press tank 10, an air compressor 20, a stirring assembly 30, a filter element 40, and a sampling tank 50. The filter press tank 10 has a first storage chamber. The air compressor 20 is connected to the filter press tank 10 via a first pipe 71, connecting the first storage chamber and the interior of the air compressor 20. The stirring assembly 30 is rotatably mounted on the filter press tank 10 and extends into the first storage chamber. The filter element 40 is disposed in the first storage chamber and located below the stirring assembly 30. The sampling tank 50 has a second storage chamber. The filter press tank 10 is connected to the sampling tank 50 via a second pipe 72, connecting the first and second storage chambers. The connection point of the second pipe 72 to the filter press tank 10 is located below the filter element 40. A detection device is mounted on the sampling tank 50 and extends into the second storage chamber.

[0032] Thus, the filter press 10 is provided with a first storage chamber. An air compressor 20 is connected to the filter press 10 via a first pipe 71, enabling the air compressor 20 to provide pressure to the slurry in the first storage chamber, achieving active filtration of the slurry, improving the filtration speed and efficiency, and reducing residual impurities. The sampling tank 50 is connected to the filter press 10 via a second pipe 72. The inlet of the second pipe 72 is located below the filter element 40, ensuring that the second storage chamber in the sampling tank 50 receives effectively filtered mother liquor with fewer and more uniformly distributed solid particles, thereby improving the detection accuracy of the detection device. Furthermore, the detection device allows the mother liquor obtained after slurry filtration to enter the sampling tank 50 and be detected online in real time and accurately, reducing the problem of poor detection accuracy caused by the uneven distribution of solid particles in high-concentration slurry. Therefore, the technical solution of this embodiment effectively solves the problem of poor online detection accuracy of parameters such as the density of mother liquor in related technologies.

[0033] In this embodiment, the stirring assembly 30 includes a motor mounted on the filter press 10 and a stirring paddle disposed in the first storage chamber. The motor shaft drives the stirring paddle to rotate within the first storage chamber. The filter element 40 is preferably a filter cloth, activated carbon filter, membrane filter, or fiber filter.

[0034] like Figure 1 As shown, the connection between the first pipeline 71 and the filter press 10 is located on the top surface of the filter press 10. This connection optimizes the compressed airflow path, ensuring that the compressed air is evenly distributed on the surface of the slurry within the filter press 10, thereby improving the filtration efficiency and effect. A first air inlet valve 711 is installed on the first pipeline 71. The first air inlet valve 711 precisely controls the flow rate and pressure of the compressed air, making the filtration process more stable and avoiding problems such as uneven filter cake formation or insufficient filtrate drainage caused by air pressure fluctuations.

[0035] In other embodiments, the connection between the first pipeline 71 and the filter press 10 is located on the top surface of the filter press 10. Alternatively, a first air inlet valve 711 may be provided on the first pipeline 71.

[0036] like Figure 1 As shown, the air compressor 20 is also connected to the filter press tank 10 via a third pipe 73, connecting the first storage chamber and the interior of the air compressor 20; the connection point of the third pipe 73 to the filter press tank 10 is located below the filter element 40. The third pipe 73 facilitates the introduction of compressed air during the cleaning of the filter press tank 10, thoroughly dispersing the remaining residue in the first storage chamber for backwashing, facilitating subsequent residue discharge, improving cleaning efficiency, and making the cleaning more thorough. A second air inlet valve 731 is installed on the third pipe 73. The second air inlet valve 731 provides precise control over the compressed air flow rate, ensuring that the supply of compressed air can be flexibly adjusted according to actual needs during the rinsing process, thereby optimizing the cleaning effect.

[0037] In other embodiments, the air compressor 20 is also connected to the filter press 10 via a third pipe 73 to connect the first storage chamber and the interior of the air compressor 20; the connection between the third pipe 73 and the filter press 10 is located below the filter element 40. Alternatively, a second air inlet valve 731 is provided on the third pipe 73.

[0038] like Figure 1 As shown, the filter press also includes a pressure detection element 82, which is installed on the filter press tank 10 and extends into the first storage chamber. The pressure detection element 82 enables the system to monitor the pressure changes caused by the compressed air introduced into the filter press tank 10 during the filter press process in real time, ensuring that the filter press operation can be carried out within the ideal pressure range and avoiding a decrease in filtration efficiency or equipment damage due to overpressure or underpressure.

[0039] like Figure 1 As shown, the sampling container 50 includes a first cylindrical body 51 and a first conical body 52 connected to the first cylindrical body 51. The first cylindrical body 51 is located above the first conical body 52. ​​The first conical body 52 has a first conical cavity with a diameter that gradually decreases from top to bottom. The inner cavity of the first cylindrical body 51 and the first conical cavity form a second storage cavity. The sampling container 50 is designed with a connected structure between the first cylindrical body 51 and the first conical body 52, where the first cylindrical body 51 is located above and the first conical body 52 is located below and has a first conical cavity with a gradually decreasing diameter. In this way, the upper first cylindrical body 51 can provide a larger storage space, effectively holding more mother liquor sample. The gradually decreasing diameter design of the lower first conical body 52 is conducive to the rapid accumulation of mother liquor and also facilitates the complete discharge of mother liquor.

[0040] like Figure 1 As shown, the detection device includes a density measuring element 61, a temperature measuring element 62, and a conductivity measuring element 63. These elements are spaced apart on the first cone 52, and all extend into the first conical cavity. By correspondingly positioning the density measuring element 61, temperature measuring element 62, and conductivity measuring element 63 to the first conical cavity, even a small amount of mother liquor can accumulate within the cavity, facilitating the detection of the mother liquor by these elements.

[0041] In this embodiment, the density measuring device 61 is preferably a high-precision density meter for detecting the density of the mother liquor. The temperature measuring device 62 is preferably a thermometer, a resistance temperature detector, or a semiconductor temperature sensor for detecting the temperature of the mother liquor. The conductivity measuring device 63 is preferably an inductive conductivity meter for detecting the conductivity of the mother liquor to determine its saturation.

[0042] like Figure 1 As shown, the detection device includes a liquid level sensor 64, which is located at the upper end of the first cylinder 51 and extends into the inner cavity of the first cylinder 51. The liquid level sensor 64 enables the system to monitor changes in the liquid level within the sampling tank 50 in real time, improving the automation level of the filter press equipment. Positioning the liquid level sensor 64 at the upper end of the first cylinder 51 also improves the accuracy of its detection of the mother liquor level within the sampling tank 50.

[0043] like Figure 1 As shown, the filter press also includes a drain pipe 81, which is connected to the first storage chamber. The connection between the drain pipe 81 and the filter press tank 10 is located above the filter element 40. The connection between the drain pipe 81 and the first storage chamber ensures that impurities accumulated above the filter element 40 can be removed in a timely manner, preventing clogging and maintaining smooth system operation. There are two filter press tanks 10, both connected to the sampling tank 50. By configuring two filter press tanks 10, not only is the processing capacity and system reliability improved, but the alternating operation of the sampling tank 50 is also achieved. While one sampling tank 50 is in filter pressing operation, the other can be prepared for cleaning or remain in standby mode, effectively avoiding production interruptions caused by the maintenance of a single sampling tank 50 and ensuring a continuous and stable production rhythm.

[0044] In this embodiment, a first shut-off valve is installed on the drain pipe 81 to control the opening and closing of the drain pipe 81, and a second shut-off valve is installed on the second pipeline 72 to control the opening and closing of the second pipeline 72. The filter press equipment also includes a feed pipe and a feed valve installed on the feed pipe. When the slurry is filtered, the slurry is quantitatively delivered to the filter press tank 10 through the feed pipe, and then the feed valve is closed, causing the first shut-off valve to disconnect the drain pipe 81. The second shut-off valve on the second pipeline 72 disconnects the filter press tank 10 from the sampling tank 50, the second air inlet valve 731 disconnects the third pipeline 73, and the first air inlet valve 711 connects to the first pipeline 71. When the liquid level in the filter press tank 10 reaches the preset liquid level and no longer rises, the first air inlet valve 711 is closed, and the second shut-off valve is opened to connect the filter press tank 10 and the sampling tank 50. The detection device detects the mother liquor in the sampling tank 50 and records the measurement data of this sample. The cleaning steps for the filter press 10 include: opening the feed valve, allowing fresh water to enter the filter press 10 through the feed pipe; closing the feed valve after the liquid level reaches the preset value; simultaneously starting the stirring assembly 30 and opening the second air inlet valve 731; closing the second air inlet valve 731 after one minute; and opening the first shut-off valve to discharge wastewater; and completing the cleaning work when the liquid level drops below the set value, followed by initializing the detection device.

[0045] In other embodiments, the filter press further includes a drain pipe 81, which is connected to the first storage chamber, and the connection between the drain pipe 81 and the filter press tank 10 is located above the filter element 40. Alternatively, there are two filter press tanks 10, both of which are connected to the sampling tank 50.

[0046] like Figure 1 As shown, the filter press 10 includes a second cylindrical body 11 and a second conical body 12 connected to the second cylindrical body 11. The second cylindrical body 11 is located above the second conical body 12, and the second conical body 12 has a second conical cavity that gradually decreases in size from top to bottom. The inner cavity of the second cylindrical body 11 and the second conical cavity form a second storage cavity. The filter press 10 is designed with a connecting structure between the second cylindrical body 11 and the second conical body 12, where the second cylindrical body 11 is located above and the second conical body 12 is located below and has a second conical cavity with a gradually decreasing diameter. In this way, the upper second cylindrical body 11 can provide a larger storage space, effectively holding more of the filtered slurry, i.e., mother liquor. The gradually decreasing diameter design of the lower second conical body 12 is conducive to the rapid accumulation of mother liquor and also facilitates the thorough discharge of mother liquor.

[0047] like Figure 1As shown, the stirring assembly 30 is rotatably disposed within the inner cavity of the second cylinder 11, and the filter element 40 is disposed within the inner cavity of the second cylinder 11. This rotatable arrangement allows the stirring assembly 30 to agitate the slurry within the relatively large second cylinder 11, while the filter element 40 filters the slurry and transports the filtered slurry to the second cone 12, improving both the filtration efficiency and the agitation efficiency during cleaning. The connection between the second pipeline 72 and the filter press 10 is located on the second cone 12. This facilitates the rapid accumulation of mother liquor within the second cone 12 before it enters the second pipeline 72, improving the mother liquor transport efficiency, reducing the risk of impurity deposition within the second cone 12, and ensuring the long-term stable operation of the equipment.

[0048] In other embodiments, the stirring assembly 30 is rotatably disposed within the inner cavity of the second cylinder 11, and the filter element 40 is disposed within the inner cavity of the second cylinder 11. Alternatively, the connection between the second pipeline 72 and the filter press 10 is disposed on the second cone 12.

[0049] The inventors discovered that in the potash fertilizer production field, the measurement of crystallizer mother liquor density in related technologies generally employs a comprehensive scheme encompassing structural flow guidance, passive filtration, pump measurement, and a combined cleaning system. However, despite its theoretically sound approach, this scheme has consistently failed to achieve real-time monitoring of density and relative component content within the crystallizer in practical applications over the past decade. A deeper investigation reveals that the primary problem lies in the difficulty of existing measuring equipment to operate reliably and stably for extended periods in high-concentration slurry environments. The corrosive and clogging nature of high-concentration slurry environments leads to frequent equipment malfunctions, preventing continuous operation and accurate data delivery. Furthermore, the crucial online measurement technology has relied on indirect conversion using mass flow meters. While this method can reflect density changes in the mother liquor to some extent, its accuracy is relatively low and cannot meet the demands of high-precision real-time monitoring. These technological limitations have kept crystallizer mother liquor density monitoring in potash fertilizer production stagnant, severely impacting production efficiency and product quality. Currently, crystallizer density measurement technology, a core component of potash fertilizer production crystallizer operations, has remained unresolved for nearly two decades. The root causes lie primarily in the overly complex structural design of the measuring equipment, which severely hinders the flow of high-concentration slurry; its unreasonable operating mode, making it difficult to adapt to the prolonged flow of high-concentration slurry; and the inefficient filtration system, frequently causing blockages. These defects lead to unstable equipment operation in harsh environments, manifesting as frequent damage to valves and sensors, frequent pipe blockages, a surge in maintenance workload, and persistently high maintenance costs. In the long run, these problems not only weaken measurement accuracy but also impair the control efficiency of the crystallization process, ultimately dragging down the overall potash fertilizer production efficiency.

[0050] The technical solution of this embodiment, through the installation of an air compressor, can provide pressure to the slurry in the first storage chamber, achieving forced active thermal filtration of the slurry. This improves the filtration speed and efficiency while reducing residual impurities. By replacing the passive filtration method relied upon in the existing potash fertilizer industry, this active thermal filtration not only improves filtration speed and efficiency but also reduces residual impurities. Secondly, a high-precision density measuring device replaces the traditional mass flow meter, enabling more accurate and real-time monitoring of material density. Furthermore, additional conductivity and temperature measuring devices are added and closely integrated with the density meter to perform multi-dimensional data analysis of the mother liquor components, including concentration changes and ion content, thereby optimizing the quality control process of the potash fertilizer crystallizer and improving product purity and overall process stability. Currently, in the potash salt production industry, there is no successfully applied equipment for mother liquor separation and density measurement within the crystallizer slurry. This is because existing equipment requires a large filtration volume per unit time, frequent rinsing, and high maintenance, making it difficult to implement in engineering. Density measuring equipment uses a mass flow meter for back-calculation, but the calculation accuracy is insufficient and cannot meet the crystallizer control requirements.

[0051] The filter elements and valves in this embodiment are consumable components, and their service life is closely related to the frequency of filtration operations per unit time. Specifically, the more filtrations, the faster the wear and tear, thus requiring regular monitoring and replacement. To accurately assess their remaining lifespan, this equipment is equipped with an advanced self-learning system. This system can dynamically analyze and judge the health status of the filter structure based on actual usage data, thereby ensuring the continuous and efficient operation of the equipment. This embodiment features a small number of devices and a simple overall structural design, using an indirect sampling method with settable time intervals for density measurement. The cleaning scheme for the filter press innovatively combines air washing, water washing, and mechanical high-intensity cleaning simultaneously. This comprehensive design effectively solves common technical problems in density measurement, such as frequent equipment clogging and high damage rates caused by frequent cleaning and clogging. Ultimately, the equipment exhibits significant advantages, including significantly reduced maintenance workload, greatly improved operational stability, and predictable planned maintenance characteristics, greatly optimizing the continuity of the production process and the service life of the equipment. The filter press equipment in this embodiment differs from the previously used passive sedimentation and sand filtration technologies. It pioneered the introduction of active thermal filtration technology in the potash slurry industry, offering significant advantages such as low load, low system operating resistance, resistance to clogging, long maintenance cycles, high measurement accuracy, and good stability. This equipment effectively improves mother liquor separation efficiency through active thermal filtration, ensuring the accuracy and reliability of density measurement data. It is suitable for continuous, large-scale industrial production environments, significantly improving quality control in potash processing. The filter press equipment in this embodiment employs intermittent measurement with settable time intervals, adjusting continuous measurement to an intermittent mode, reducing the load on the filtration equipment while fully meeting the requirements relative to the crystallizer's workload. Secondly, the detection device uses a densitometer for direct measurement, with accuracy fully meeting the crystallizer control requirements. Furthermore, the cleaning intensity within the filter press tank is significantly reduced, employing a combination of agitation, water, and air backflushing for cleaning, significantly improving the operational stability of the filter press tank. In recent years, in the potash fertilizer production field, the measurement of the specific gravity of the crystallizer mother liquor has generally adopted a comprehensive solution that includes structural drainage, passive filtration, pump measurement, and a cleaning system. However, this approach has failed to be successfully applied to real-time monitoring of specific gravity and relative component content within crystallizers over the past decade. The root cause lies primarily in the difficulty of existing measuring equipment to operate reliably and stably for extended periods in high-concentration slurry environments, and the lack of substantial breakthroughs in key online measurement technologies. Therefore, current technological trends have shifted towards innovative models combining active pressure filtration with passive measurement.

[0052] In this embodiment, the filter press equipment can achieve mother liquor separation and density measurement of potash slurry, and has already achieved mature engineering applications in the high-purity boric acid preparation industry. Through its efficient solid-liquid separation mechanism, this filter press equipment significantly improves the accuracy and stability of mother liquor separation. Its operating performance fully meets the various technical requirements for material separation in industrial production, and demonstrates excellent reliability and adaptability in actual production processes, providing key technical support for the large-scale, continuous production of high-purity boric acid. The filter press equipment in this embodiment avoids the traditional industrial control methods that rely on manual intervention, innovatively adopting the concept of process automation, and achieving autonomous equipment control through a deep synergy of process mechanism and control modeling. The specific implementation process includes: high-precision detection devices and instruments deployed on-site continuously collect key process parameter data. This data is transmitted in real-time and stably to the process mechanism model calculation core in the background via a high-speed industrial network. This mechanism model strictly follows the basic laws of physicochemical processes and process principles, conducting in-depth dynamic analysis, feature extraction, and multi-dimensional analysis of the input data to generate an accurate understanding of the current operating conditions. These high-value analysis results are then efficiently transmitted to the underlying distributed control system (DCS) or programmable logic controller (PLC) execution layer in milliseconds. Based on this, the control system makes intelligent decisions, quickly executing dynamic and adaptive adjustment commands and optimized operation strategies to fine-tune the equipment operating status in a closed loop. At the same time, the system provides the real-time operating status of the production process, core key performance parameters (KPIs), and targeted operation suggestions and early warning information based on model analysis to operators on-site or in the central control room clearly and promptly through a human-machine interface (HMI), thereby significantly improving the control accuracy, operational safety, and production decision-making efficiency of the entire process. The core innovation of this model lies in replacing the traditional passive filtration method with a forced active pressure filtration stage, while retaining mature and reliable passive measurement technology and integrating a highly efficient and automated cleaning mechanism. Particularly noteworthy is that this integrated design of active pressure filtration and efficient cleaning can perfectly preserve the original crystal structure of the slurry within the crystallizer, which is crucial for product quality. This maximizes the effective separation of solids and liquids in the slurry, creating ideal conditions for subsequent accurate measurements. This model has been successfully and stably operating in the production of inorganic salts, such as high-purity boric acid, for over six years, and its reliability and stability have been fully verified in practice. The advantages of this model are extremely prominent: First, the number of equipment required by the system is significantly reduced (for example, the reliance on pumps for mother liquor transportation in the intermediate stages is completely eliminated); second, the failure rate of the entire system is significantly reduced; and third, the workload and complexity of daily maintenance are also greatly reduced. These advantages collectively ensure that the system can achieve continuous, stable, and long-term uninterrupted operation. Furthermore, the design of this model allows for seamless integration with the plant's existing model predictive control server.Key process parameters such as the specific gravity of the mother liquor can be collected in real time and at high frequency, and transmitted instantly to the server for in-depth data mining and model analysis. The analysis results are then quickly and accurately transmitted to downstream process control systems (such as DCS or PLC) via standard industrial communication protocols. Based on this precise feedback information, the system can perform extremely precise online control of the equivalent of key components in the mother liquor, significantly improving the automation control accuracy and intelligent management level of the entire potash fertilizer crystallization production process, ultimately achieving better process indicators and product quality. Simultaneously, this online specific gravity measurement system is equipped with an advanced system equipment health self-learning mechanism. This mechanism, based on artificial intelligence algorithms, monitors and learns equipment operating modes in real time. By continuously collecting and analyzing operating data, including key parameters such as pressure, temperature, and flow rate, the system can intelligently determine the rate of decline and trend changes in the filtration capacity of the filter press system, as well as the health status and potential failure risks of key equipment such as instruments and valves. Using the equipment health pre-inspection system, we can accurately formulate reasonable downtime schedules based on the prediction results, such as on weekends or during periods of low production demand, to ensure preventive maintenance and calibration operations on system equipment during off-peak production periods. This not only effectively reduces unplanned downtime and accidental failure rates, but also extends equipment lifespan, lowers maintenance costs, and significantly enhances overall operating efficiency and production line stability. By precisely measuring the specific gravity, conductivity, and turbidity of the crystallizer under different temperature conditions, and combining this with expertise in potassium salt phase diagrams, the changing trends of magnesium content within the crystallizer under different specific gravity environments are systematically analyzed and derived. Utilizing dynamic data fluctuations in magnesium ions in the mother liquor, and integrating component distribution information from the phase diagram at different temperature points in the control model, the amount of mother liquor added is precisely calculated using a real-time algorithm. This effectively maintains a stable environment for crystallization parameters within the crystallizer, creating optimal conditions for crystal precipitation. This fundamental guarantee for stable crystallizer operation provides solid support for continuous crystal growth, completely replacing the previous method of adding mother liquor based on ore quantity estimation. It significantly reduces the risk of yield decline in the crystallization section caused by fluctuations in mother liquor flow rate, further consolidating the controllability of crystal growth. Meanwhile, the reliable guarantee of crystal development conditions effectively alleviates the operational pressure and yield loss of the subsequent flotation system, while avoiding increased burden on the dust removal process and increased potassium content in the flue gas caused by crystallizer instability, ultimately comprehensively improving overall production yield efficiency. Crystallizer instability leads to an increase in powdered potassium fertilizer.

[0053] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0054] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0055] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0056] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A filter press, characterized in that, include: A filter press (10) is provided with a first storage chamber; An air compressor (20) is connected to the filter press (10) via a first pipeline (71) to connect the first storage chamber and the interior of the air compressor (20); A stirring assembly (30) is rotatably mounted on the filter press (10) and extends into the first storage chamber; A filter element (40) is disposed in the first storage chamber and located below the stirring assembly (30); The sampling tank (50) is provided with a second storage chamber. The filter press (10) is connected to the sampling tank (50) through a second pipeline (72) to connect the first storage chamber and the second storage chamber. The connection between the second pipeline (72) and the filter press (10) is located below the filter element (40). The detection device is mounted on the sampling container (50) and extends into the second storage chamber.

2. The filter press according to claim 1, characterized in that, The connection between the first pipeline (71) and the filter press (10) is located on the top surface of the filter press (10), and / or, the first pipeline (71) is provided with a first air inlet valve (711).

3. The filter press according to claim 1, characterized in that, The air compressor (20) is also connected to the filter press (10) via a third pipeline (73) to connect the first storage chamber and the interior of the air compressor (20); The connection point between the third pipeline (73) and the filter press (10) is located below the filter element (40); and / or, The third pipeline (73) is equipped with a second air intake valve (731).

4. The filter press according to claim 1, characterized in that, The filter press also includes a pressure detection element (82), which is disposed on the filter press tank (10) and extends into the first storage chamber.

5. The filter press according to claim 1, characterized in that, The sampling container (50) includes a first cylindrical body (51) and a first cone (52) communicating with the first cylindrical body (51). The first cylindrical body (51) is located above the first cone (52). The first cone (52) has a first conical cavity with a diameter that gradually decreases from top to bottom. The inner cavity of the first cylindrical body (51) and the first conical cavity form the second storage cavity.

6. The filter press according to claim 5, characterized in that, The detection device includes a density measuring element (61), a temperature measuring element (62), and a conductivity measuring element (63). The density measuring element (61), the temperature measuring element (62), and the conductivity measuring element (63) are spaced apart on the first cone (52), and the density measuring element (61), the temperature measuring element (62), and the conductivity measuring element (63) all extend into the first conical cavity.

7. The filter press according to claim 5, characterized in that, The detection device includes a liquid level sensor (64), which is disposed at the upper end of the first cylinder (51) and extends into the inner cavity of the first cylinder (51).

8. The filter press according to claim 1, characterized in that, The filter press further includes a drain pipe (81), which is connected to the first storage chamber. The connection between the drain pipe (81) and the filter press tank (10) is located above the filter element (40); and / or, There are two filter presses (10), and both filter presses (10) are connected to the sampling tank (50).

9. The filter press according to claim 1, characterized in that, The filter press (10) includes a second cylinder (11) and a second cone (12) communicating with the second cylinder (11). The second cylinder (11) is located above the second cone (12). The second cone (12) has a second conical cavity that gradually decreases in size from top to bottom. The inner cavity of the second cylinder (11) and the second conical cavity form the second storage cavity.

10. The filter press according to claim 9, characterized in that, The stirring assembly (30) is rotatably disposed within the inner cavity of the second cylinder (11), and the filter element (40) is disposed within the inner cavity of the second cylinder (11); and / or, The connection between the second pipeline (72) and the filter press (10) is located on the second cone (12).

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