Device, method and system for monitoring moisture content of filter cake and suction filtration testing device

Abstract

The invention provides a filter cake moisture content monitoring device, method and system and a suction filtration testing device, and relates to the technical field of filter monitoring. The filter cake moisture content monitoring device comprises a first granularity measuring unit, a first thickness visual identification unit and a first control unit. According to the device, the granularity of first slurry is measured through a first granularity measuring unit, and a first thickness visual identification unit identifies the filter cake thickness of a target filter cake, so that a first control unit is adopted to determine the filter cake water content corresponding to the target filter cake according to the granularity of the first slurry, the filter cake thickness, preset filtering related data and a preset water content determination algorithm; the water content of the filter cake is monitored in real time, the filter cake does not need to be contacted, and the integrity of the filter cake is not damaged, so that the filter cake with high water content can be prevented from being conveyed, the pipeline blockage condition can be reduced, and the system stability is improved.

Description

Technical Field

[0001] The present application belongs to the technical field of filter monitoring, and specifically relates to a filter cake moisture content monitoring device, method, system and filtration testing device. Background Art

[0002] A rotary drum vacuum filter receives sediment slurry from upstream and sequentially completes four operations: slurry filtration, cake drying, cake discharge, and filter medium regeneration. Because the rotary drum vacuum filter is a continuous filter, its upstream and downstream equipment generally utilizes continuous processing equipment to match its high-throughput slurry processing capacity.

[0003] In related technologies, when the viscosity and particle size of the slurry entering the filter fluctuate, the filter still performs filtration according to the specified filtration process parameters, which directly leads to the filter cake moisture content exceeding the standard. The filter cake with high moisture content is very likely to cause pipeline blockage during transportation and greatly increase the load on downstream equipment. The above problems reduce the stability of the system.

[0004] Therefore, in the related art, filter cakes with high moisture content may cause pipeline blockage and reduce system stability during transportation, which requires further optimization. Summary of the Invention

[0005] The technical problem to be solved by the present application is to address the above-mentioned deficiencies in the prior art and to provide a filter cake moisture content monitoring device, method, system and filtration testing device. By using the filter cake moisture content monitoring device, the filter cake moisture content can be monitored in real time to avoid transporting filter cakes with high moisture content, thereby reducing pipeline blockage and improving system stability.

[0006] In a first aspect, an embodiment of the present application provides a filter cake moisture content monitoring device, comprising:

[0007] a first particle size measurement unit, a first thickness visual recognition unit, and a first control unit;

[0008] The first particle size measurement unit is placed in the slurry storage container upstream of the vacuum drum filter;

[0009] The first control unit is connected to the first particle size measurement unit and the first thickness visual recognition unit respectively;

[0010] The first thickness visual recognition unit is used to identify the filter cake thickness of the target filter cake and transmit the filter cake thickness to the first control unit; the target filter cake is located at the end position of the filter cake dehydration zone of the vacuum drum filter;

[0011] The first particle size measuring unit is used to measure a first slurry particle size of the slurry in the slurry storage container and transmit the first slurry particle size to the first control unit;

[0012] The first control unit is configured to determine the target filter cake moisture content according to the first slurry particle size, the filter cake thickness, preset filter-related data, and a preset moisture content determination algorithm.

[0013] In some embodiments of the first aspect, the first particle size measurement unit is an online particle size measurement instrument.

[0014] The first thickness visual recognition unit is a visual recognition camera.

[0015] The visual recognition camera is configured to capture the target filter cake to identify the filter cake thickness of the target filter cake.

[0016] In some embodiments of the first aspect, the preset filter-related data includes a first preset filter medium surface area and a first slurry solid content, the first preset filter medium surface area corresponds to a filter assembly in the vacuum drum filter, and the first slurry solid content is a slurry solid content of the filter assembly in the vacuum drum filter.

[0017] When determining the target filter cake moisture content according to the first slurry particle size, the filter cake thickness, the preset filter-related data, and the preset moisture content determination algorithm, the method is specifically configured to:

[0018] calculating a product of the filter cake thickness and the first preset filter medium surface area to generate a filter cake volume;

[0019] calculating a quotient between the first slurry solid content and the filter cake volume to generate a filter cake density;

[0020] inputting the filter cake density and the first slurry particle size into the preset moisture content determination algorithm to generate the target filter cake moisture content.

[0021] In some embodiments of the first aspect, the first control unit is further configured to:

[0022] calculating the first slurry solid content according to the slurry flow rate, a second slurry solid content, and a rotation speed of the vacuum drum filter; the slurry flow rate and the second slurry solid content are related to the slurry flowing from the slurry storage container into the vacuum drum filter.

[0023] Based on the same inventive concept, in a second aspect, the embodiments of the present application further provide a filter cake moisture content monitoring method based on the filter cake moisture content monitoring device of any one of the first aspect, the method is applied to the first control unit in the filter cake moisture content monitoring device, and the method includes:

[0024] receiving the first slurry particle size transmitted by the first particle size measurement unit; the first slurry particle size is generated by measuring the slurry in the slurry storage container by the first particle size measurement unit; and the slurry storage container is located upstream of the vacuum drum filter.

[0025] receiving the filter cake thickness transmitted by the first thickness visual recognition unit; the filter cake thickness is generated after the first thickness visual recognition unit recognizes the thickness of the target filter cake; the target filter cake is located at the end position of the filter cake dehydration zone of the vacuum drum filter;

[0026] The filter cake moisture content corresponding to the target filter cake is determined according to the first slurry particle size, the filter cake thickness, preset filtration-related data and a preset moisture content determination algorithm; the preset filtration-related data is related to the vacuum drum filter.

[0027] In some embodiments of the second aspect, the preset filtration-related data includes: a first preset filter medium surface area and a first slurry solids content; the first preset filter medium surface area corresponds to a filter assembly in a vacuum drum filter; the first slurry solids content is a slurry solids content of the filter assembly in the vacuum drum filter;

[0028] Determining the filter cake moisture content corresponding to the target filter cake according to the first slurry particle size, the filter cake thickness, preset filtration-related data, and a preset moisture content determination algorithm includes:

[0029] calculating the product of the filter cake thickness and the surface area of ​​the first predetermined filter medium to generate a filter cake volume;

[0030] Calculating the quotient between the solid content of the first slurry and the volume of the filter cake to generate a corresponding filter cake density;

[0031] The filter cake density and the first slurry particle size are input into a preset moisture content determination algorithm to generate a corresponding filter cake moisture content.

[0032] In some embodiments of the second aspect, the method further comprises:

[0033] The first slurry solid content is calculated based on the slurry flow rate, the second slurry solid content and the vacuum drum filter speed; the slurry flow rate and the second slurry solid content are related to the slurry flowing from the slurry storage container into the vacuum drum filter.

[0034] Based on the same inventive concept, in a third aspect, an embodiment of the present application further provides a filter cake moisture content monitoring system, comprising: a vacuum drum filter, a slurry storage container, and a filter cake moisture content monitoring device as described in any one of the first aspects;

[0035] The slurry storage container is connected to the vacuum drum filter;

[0036] The slurry storage container is used to store the slurry and transfer the slurry to the vacuum drum filter to filter the slurry through the vacuum drum filter to generate a target filter cake;

[0037] The filter cake moisture content monitoring device is used to measure the first slurry particle size of the slurry in the slurry storage container and identify the filter cake thickness of the target filter cake;

[0038] The filter cake moisture content monitoring device is also used to determine the filter cake moisture content corresponding to the target filter cake based on the first slurry particle size, filter cake thickness, preset filtration-related data and a preset moisture content determination algorithm; the preset filtration-related data is related to the vacuum drum filter.

[0039] Based on the same inventive concept, in a fourth aspect, an embodiment of the present application further provides a filtration testing device, comprising: a slurry generation measurement unit, a filtration measurement unit, a second particle size measurement unit, a second thickness visual recognition unit, and a second control unit;

[0040] The slurry generation measurement unit is connected to the filtration measurement unit;

[0041] The second control unit is respectively connected to the slurry generation measurement unit, the suction filtration measurement unit, the second particle size measurement unit and the second thickness visual recognition unit;

[0042] The slurry generation and measurement unit is used to generate and measure a first weight of the original slurry, transmit the first weight to the second control unit, and flow the test slurry into the suction filtration measurement unit; the test slurry is part or all of the original slurry;

[0043] The filtration measurement unit is used to perform vacuum filtration on the test slurry to generate an initial filter cake and a filtrate after filtration, and to measure the weight change data of the test filter cake before and after drying and the second weight of the filtrate, and transmit the weight change data and the second weight to the second control unit; the test filter cake is part or all of the initial filter cake;

[0044] The second particle size measuring unit is used to measure the second slurry particle size of the original slurry;

[0045] The second thickness visual recognition unit is used to recognize the thickness of the initial filter cake and transmit the thickness to the second control unit;

[0046] The second control unit is used to construct a preset moisture content determination algorithm based on the first weight, the second weight, the weight change data, the thickness, the second preset filter medium surface area and the second slurry particle size.

[0047] In some embodiments of the fourth aspect, the slurry generation measurement unit includes: a slurry generation module and a slurry storage measurement module;

[0048] The slurry generation module is connected to the inlet end of the slurry storage and measurement module;

[0049] The outlet end of the slurry storage measurement module is connected to the suction filtration measurement unit;

[0050] The slurry generation module is used to generate original slurry and transport the original slurry to the slurry storage and measurement module;

[0051] The slurry storage and measurement module is used to store the original slurry delivered by the slurry generation module, deliver the test slurry to the suction filtration measurement unit, and measure the first weight of the stored original slurry and transmit the first weight to the second control unit.

[0052] In some embodiments of the fourth aspect, the slurry generation module includes: a precipitation reaction raw material storage tank, a peristaltic pump, a hose, a precipitation reaction container, and an agitator;

[0053] The outlet of the precipitation reaction raw material storage tank is connected to the peristaltic pump and the inlet of the precipitation reaction container in sequence through a hose; the overflow outlet of the precipitation reaction container is connected to the inlet of the slurry storage and measurement module;

[0054] The precipitation reaction raw material storage tank transports the slurry raw material to the precipitation reaction container through a peristaltic pump;

[0055] The agitator is used to agitate the slurry raw material flowing into the precipitation reaction container to generate an original slurry;

[0056] The precipitation reaction container transports the original slurry to the slurry storage and measurement module through the overflow outlet;

[0057] The second particle size measurement unit is suspended in the precipitation reaction container to measure the second slurry particle size of the original slurry in the precipitation reaction container.

[0058] In some embodiments of the fourth aspect, the slurry storage and measurement module includes: a slurry storage tank, a slurry weighing scale, a valve, and a slurry nozzle;

[0059] The upper end interface of the slurry storage tank is connected to the overflow outlet of the precipitation reaction container;

[0060] The lower end interface of the slurry storage tank is connected to the slurry nozzle through a valve;

[0061] The slurry storage tank is placed on a slurry weighing scale;

[0062] The slurry storage tank is used to store the original slurry delivered by the precipitation reaction vessel;

[0063] The valve is used to control the on-off state of the flow path between the slurry storage tank and the slurry nozzle;

[0064] The slurry nozzle is used to transport the test slurry to the filtration measurement unit;

[0065] The slurry weighing scale is used to measure a first weight of the original slurry stored in the slurry storage tank, and transmit the first weight to the second control unit.

[0066] In some embodiments of the fourth aspect, the filtration measurement unit includes a vacuum filtration module, a filtrate storage tank, a filtrate weighing scale, and a drying measurement module;

[0067] The slurry inlet end of the vacuum filtration module corresponds to the slurry nozzle, and the filtrate outlet end of the vacuum filtration module is connected to the lower end interface of the filtrate storage tank;

[0068] The upper end interface of the filtrate storage tank is connected to the negative pressure supply end of the vacuum filtration module;

[0069] The filtrate storage tank is placed on a filtrate weighing scale;

[0070] The drying measurement module is connected to the second control unit;

[0071] The filtrate storage tank is used to store the filtrate generated after the vacuum filtration module filters the test filtrate;

[0072] The filtrate weighing scale is used to measure a second weight of the filtrate stored in the filtrate storage tank and transmit the second weight to the second control unit;

[0073] The second thickness visual recognition unit is used to identify the thickness of the initial filter cake generated by filtration in the vacuum filtration module and transmit the thickness to the second control unit;

[0074] The drying measurement module is used to dry the test filter cake, measure the weight change data of the test filter cake before and after drying, and transmit the weight change data to the second control unit.

[0075] In some embodiments of the fourth aspect, the vacuum filtration module comprises: a vacuum filtration stand, a negative pressure buffer tank, and a negative pressure source;

[0076] The vacuum filtration stand is placed directly below the slurry nozzle, and the lower end interface of the vacuum filtration stand is connected to the lower end interface of the filtrate storage tank; the vacuum filtration stand is generated based on the vacuum drum filter structure;

[0077] One end of the negative pressure buffer tank is connected to the upper end interface of the filtrate storage tank;

[0078] The other end of the negative pressure buffer tank is connected to the negative pressure source;

[0079] The negative pressure source and the negative pressure buffer tank are used to provide negative pressure to the vacuum filtration stand, so that the vacuum filtration stand can filter the test filtrate flowing out of the slurry nozzle to generate an initial filter cake.

[0080] In some embodiments of the fourth aspect, the drying measurement module includes: a drying oven and a filter cake weighing scale;

[0081] The filter cake weighing scale is connected to the second control unit;

[0082] The oven is used to dry the test filter cake;

[0083] The filter cake weighing scale is used to measure the weight change data of the test filter cake before and after drying, and transmit the weight change data to the second control unit.

[0084] According to the filter cake moisture content monitoring device, method, system, and filtration testing device provided in the embodiments of the present application, the filter cake moisture content monitoring device includes a first particle size measurement unit, a first thickness visual recognition unit, and a first control unit. The first particle size measurement unit measures a first slurry particle size, and the first thickness visual recognition unit identifies the filter cake thickness of the target filter cake. The first control unit then determines the filter cake moisture content corresponding to the target filter cake based on the first slurry particle size, filter cake thickness, preset filtration-related data, and a preset moisture content determination algorithm. This enables real-time monitoring of the filter cake moisture content without contacting the filter cake, thereby preventing damage to the filter cake integrity and thus avoiding the transport of filter cakes with high moisture content. This, in turn, reduces pipeline blockage and improves system stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0085] Figure 1 A schematic structural diagram of a filter cake moisture content monitoring device provided in an embodiment of the present application is shown;

[0086] Figure 2 A schematic diagram of the filter assembly structure of a vacuum drum filter provided in an embodiment of the present application is shown;

[0087] Figure 3 A schematic flow chart of a filter cake moisture content monitoring method provided in an embodiment of the present application is shown;

[0088] Figure 4 A schematic structural diagram of a filtration test device provided in an embodiment of the present application is shown;

[0089] Figure 5 Another structural schematic diagram of the filtration test device provided in an embodiment of the present application is shown;

[0090] Figure 6 A schematic structural diagram of the vacuum filtration stand provided in an embodiment of the present application is shown.

[0091] Explanation of symbols:

[0092] 10. First particle size measurement unit; 20. First thickness visual identification unit; 30. First control unit; 40. Vacuum drum filter; 41. Filter assembly base; 43. First filter medium; 45. Filter assembly suction tube; 50. Slurry storage container; 210. Slurry generation measurement unit; 211. Precipitation reaction raw material storage tank; 212. Peristaltic pump; 213. Precipitation reaction container; 214. Agitator; 215. Slurry storage tank; 216. Slurry weighing scale; 217. Valve; 218. Slurry nozzle; 230. Filtration measurement unit; 231. Vacuum filtration stand; 2311. Filtration funnel base; 2313. Second filter medium; 232. Negative pressure buffer tank; 233. Negative pressure source; 234. Filtrate storage tank; 235. Filtrate weighing scale; 250. Second particle size measurement unit; 270. Second thickness visual identification unit; 290. Second control unit. DETAILED DESCRIPTION

[0093] In order to enable those skilled in the art to better understand the technical solution of the present application, the present application is further described in detail below with reference to the accompanying drawings and embodiments.

[0094] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain the present application and are not configured to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is merely to provide a better understanding of the present application by illustrating the examples of the present application.

[0095] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0096] In the related art, filter cakes with high moisture content may cause pipeline blockage and reduce system stability during transportation, which requires further optimization.

[0097] Example 1

[0098] The filter cake moisture content monitoring device provided by the embodiment of the present application can be applied to the filter cake moisture content monitoring process in various technical fields.

[0099] As shown in Figure 1 The filter cake moisture content monitoring device provided by the embodiment of the present application comprises a first particle size measurement unit 10, a first thickness visual recognition unit 20 and a first control unit 30.

[0100] The first particle size measurement unit 10 is placed in a slurry storage container 50 upstream of a vacuum drum filter 40.

[0101] The first control unit 30 is connected with the first particle size measurement unit 10 and the first thickness visual recognition unit 20 respectively.

[0102] The first thickness visual recognition unit 20 is used to identify the filter cake thickness of the target filter cake and transmit the filter cake thickness to the first control unit 30. The target filter cake is located at the terminal position of the filter cake dewatering area of the vacuum drum filter 40.

[0103] The first particle size measurement unit 10 is used to measure the first slurry particle size of the slurry in the slurry storage container 50 and transmit the first slurry particle size to the first control unit 30.

[0104] The first control unit 30 is used to determine the filter cake moisture content corresponding to the target filter cake according to the first slurry particle size, the filter cake thickness, preset filter related data and a preset moisture content determination algorithm. The preset filter related data is related to the vacuum drum filter 40.

[0105] Illustratively, the first particle size measurement unit 10 can be an online particle size measuring instrument, a laser diffraction particle size analyzer, a dynamic light scattering instrument, etc.

[0106] Illustratively, the slurry storage container 50 is located upstream of the vacuum drum filter 40 and is used to store the precipitated slurry. The slurry storage container 50 can be a precipitated slurry reactor or a storage tank. The first particle size measurement unit 10 can be placed in the slurry storage container 50 or outside the slurry storage container 50, which can be determined based on the actual device used by the first particle size measurement unit 10.

[0107] Illustratively, the vacuum drum filter 40 is a continuous operation solid-liquid separation equipment, which is widely used in chemical industry, mining industry, environmental protection industry, etc. Its core principle is to realize efficient separation of solid particles and liquid in slurry through vacuum negative pressure driven filtration.

[0108] The vacuum drum filter 40 operates in different zones. In the filtration zone, the drum is immersed in the slurry tank. Vacuum suction forces the filtrate through the filter medium, leaving solid particles on the surface to form an initial filter cake. In the dehydration zone, after the drum leaves the slurry, continuous vacuum suction further reduces the moisture content of the filter cake. The filter cake dehydration zone is the station before the vacuum drum filter 40 is discharged. In the discharge zone, scrapers or backwash air remove the filter cake, completing the solid-liquid separation cycle. In the filter medium regeneration zone, high-pressure water or compressed air cleans the filter medium, such as the filter cloth.

[0109] like Figure 2 As shown, the filter assembly in the vacuum drum filter 40 includes a filter assembly base 41, a first filter medium 43 and a filter assembly suction tube 45, wherein the filter assembly suction tube 45 is a tool for rapid and efficient solid-liquid separation.

[0110] The target filter cake reaches the end of the cake dehydration zone of the vacuum drum filter 40, indicating that it has been dehydrated and will enter the discharge zone for the next step of cake stripping, completing the solid-liquid separation cycle. Therefore, the moisture content of the target filter cake is closely related to the subsequent cake transportation process.

[0111] Exemplarily, the first control unit 30 may be a microprocessor, a computer (eg, a notebook computer), a server, or the like.

[0112] Exemplarily, the first thickness visual recognition unit 20 may be a visual recognition camera, a visual sensor, a smart camera, etc.

[0113] Illustratively, the preset filtration-related data is related to the vacuum drum filter 40, such as the filter assembly of the vacuum drum filter 40, and includes parameters such as the filter medium surface area and the slurry solids content. The preset moisture content determination algorithm is based on a functional relationship between the slurry particle size (also referred to as the filter cake particle size), the filter cake density, and the moisture content. The filter cake density can be calculated based on the preset filtration-related data and the filter cake thickness.

[0114] In some embodiments, the first particle size measurement unit 10 is an online particle size measurement instrument.

[0115] The first thickness visual recognition unit 20 is a visual recognition camera.

[0116] The visual recognition camera is used to photograph the target filter cake to identify the filter cake thickness of the target filter cake.

[0117] The use of online particle size measuring instruments and visual recognition cameras can make the filter cake moisture content monitoring device more portable while meeting measurement requirements, and can adapt to more scenarios in actual monitoring.

[0118] In some embodiments, the preset filtration-related data includes: a first preset filter medium surface area and a first slurry solids content. The first preset filter medium surface area corresponds to the filter assembly in the vacuum drum filter 40. The first slurry solids content is the slurry solids content of the filter assembly in the vacuum drum filter 40.

[0119] When determining the filter cake moisture content corresponding to the target filter cake according to the first slurry particle size, the filter cake thickness, the preset filtration-related data and the preset moisture content determination algorithm, the first control unit 30 is specifically configured to:

[0120] The product of the filter cake thickness and the first predetermined filter medium surface area is calculated to generate the filter cake volume.

[0121] The quotient between the solid content of the first slurry and the volume of the filter cake is calculated to generate the corresponding filter cake density.

[0122] The filter cake density and the first slurry particle size are input into a preset moisture content determination algorithm to generate a corresponding filter cake moisture content.

[0123] Exemplarily, the first preset filter medium surface area corresponds to the filter assembly in the vacuum drum filter 40. The vacuum drum filter 40 generally includes multiple filter assemblies, for example, it can include 24 filter assemblies. The filter medium surface area of ​​each filter assembly is generally the same. The first slurry solids content of the filter assembly can be used to reflect the weight of the filter cake. The first slurry solids content is related to the rotation speed of the vacuum drum filter 40, the slurry outflow rate of the slurry storage container 50, and the second slurry solids content. The first slurry solids content can be obtained by calculation or pre-configured.

[0124] Exemplarily, the preset moisture content determination algorithm is based on a functional relationship among the filter cake density, the first slurry particle size, and the filter cake moisture content.

[0125] In some embodiments, the first control unit 30 is further configured to:

[0126] The first slurry solid content is calculated based on the slurry flow rate, the second slurry solid content and the vacuum drum filter speed. The slurry flow rate and the second slurry solid content are related to the slurry flowing from the slurry storage container 50 into the vacuum drum filter 40.

[0127] For example, the slurry flow rate and the speed of the vacuum drum filter can be used to calculate the amount of slurry stored in the filter assembly, which can then be combined with the solid content of the second slurry to calculate the first slurry solid content.

[0128] The first slurry solid content is calculated by the slurry flow rate, the second slurry solid content and the vacuum drum filter speed to determine the actual parameter data corresponding to the filter component, thereby providing a basis for the subsequent calculation of the filter cake moisture content.

[0129] The filter cake moisture content monitoring device of the embodiment measures the first slurry particle size through the first particle size measuring unit 10, the first thickness visual recognition unit 20 recognizes the filter cake thickness of the target filter cake, and then the first control unit 30 determines the filter cake moisture content corresponding to the target filter cake according to the first slurry particle size, the filter cake thickness, the preset filter related data and the preset moisture content determination algorithm, so that the real-time monitoring of the filter cake moisture content is realized. The filter cake moisture content monitoring device of the embodiment does not need to contact the filter cake and will not damage the integrity of the filter cake, so that the conveying of the filter cake with high moisture content can be avoided, and the pipeline blockage can be reduced, and the system stability can be improved.

[0130] The filter cake moisture content monitoring device of the embodiment adopts a non-contact online testing method, avoids the influence of the traditional contact testing on the normal operation of the filter, and improves the moisture content testing speed through online testing, which is beneficial to early intervention of the moisture content not meeting the standard, so that the equipment operation stability is also improved.

[0131] Embodiment 2

[0132] As shown in Figure 3 The filter cake moisture content monitoring method provided by the embodiment of the application is applied to the first control unit 30 in the filter cake moisture content monitoring device based on the filter cake moisture content monitoring device of embodiment 1, and can include steps S101 to S103.

[0133] S101, receiving the first slurry particle size transmitted by the first particle size measuring unit. The first slurry particle size is generated by the first particle size measuring unit when measuring the slurry in the slurry storage container. The slurry storage container is located upstream of the vacuum drum filter.

[0134] S102, receiving the filter cake thickness transmitted by the first thickness visual recognition unit. The filter cake thickness is generated by the first thickness visual recognition unit after identifying the thickness of the target filter cake. The target filter cake is located at the terminal position of the filter cake dehydration zone of the vacuum drum filter.

[0135] S103, determining the filter cake moisture content corresponding to the target filter cake according to the first slurry particle size, the filter cake thickness, the preset filter related data and the preset moisture content determination algorithm. The preset filter related data is related to the vacuum drum filter.

[0136] The filter cake moisture content monitoring method provided by the embodiment of the application avoids many problems caused by the continuous filter with excessive moisture content without timely intervention, solves the problems of filter cake damage, probe cleaning and decontamination existing in the traditional contact monitoring method, and realizes the long-period healthy operation of the vacuum drum filter and the upstream and downstream equipment.

[0137] In some embodiments, the preset filtration-related data includes: a first preset filter medium surface area and a first slurry solids content. The first preset filter medium surface area corresponds to a filter assembly in a vacuum drum filter. The first slurry solids content is the slurry solids content of the filter assembly in the vacuum drum filter.

[0138] The process of determining the filter cake moisture content corresponding to the target filter cake according to the first slurry particle size, filter cake thickness, preset filtration-related data, and a preset moisture content determination algorithm can be specifically as follows:

[0139] The product of the filter cake thickness and the first predetermined filter medium surface area is calculated to generate the filter cake volume.

[0140] The quotient between the solid content of the first slurry and the volume of the filter cake is calculated to generate the corresponding filter cake density.

[0141] The filter cake density and the first slurry particle size are input into a preset moisture content determination algorithm to generate a corresponding filter cake moisture content.

[0142] In some embodiments, a calculation process for the solid content of the first slurry is further included, as follows:

[0143] The first slurry solid content is calculated based on the slurry flow rate, the second slurry solid content and the vacuum drum filter speed. The slurry flow rate and the second slurry solid content are related to the slurry flowing from the slurry storage container into the vacuum drum filter.

[0144] The filter cake moisture content monitoring method provided in this embodiment has the beneficial effects and implementation methods of the filter cake moisture content monitoring device provided in Example 1 of the present application. For details, please refer to the specific description of the filter cake moisture content monitoring device in the above Example 1, which will not be repeated in this embodiment.

[0145] Example 3

[0146] The filter cake moisture content monitoring system provided in the embodiment of the present application is based on the filter cake moisture content monitoring device provided in Example 1 of the present application.

[0147] The filter cake moisture content monitoring system of this embodiment includes: a vacuum drum filter, a slurry storage container, and the filter cake moisture content monitoring device as described in Example 1.

[0148] The slurry storage container is connected to the vacuum drum filter.

[0149] The slurry storage container is used to store the slurry and transfer the slurry to the vacuum drum filter so as to filter the slurry through the vacuum drum filter to generate a target filter cake.

[0150] The filter cake moisture content monitoring device is used to measure the first slurry particle size of the slurry in the slurry storage container and identify the filter cake thickness of the target filter cake.

[0151] The filter cake moisture content monitoring device is further configured to determine the filter cake moisture content corresponding to the target filter cake based on the first slurry particle size, the filter cake thickness, preset filtration-related data, and a preset moisture content determination algorithm. The preset filtration-related data is associated with the vacuum drum filter.

[0152] The filter cake moisture content monitoring system provided in this embodiment has the beneficial effects and implementation methods of the filter cake moisture content monitoring device provided in Example 1 of the present application. For details, please refer to the specific description of the filter cake moisture content monitoring device in the above Example 1, which will not be repeated in this embodiment.

[0153] Example 4

[0154] like Figure 4 The embodiment of the present application also provides a filtration test device, comprising: a slurry generation measurement unit 210, a filtration measurement unit 230, a second particle size measurement unit 250, a second thickness visual recognition unit 270 and a second control unit 290.

[0155] The slurry generation measurement unit 210 is connected to the suction filtration measurement unit 230 .

[0156] The second control unit 290 is connected to the slurry generation measurement unit 210 , the suction filtration measurement unit 230 , the second particle size measurement unit 250 , and the second thickness visual recognition unit 270 , respectively.

[0157] The slurry generation and measurement unit 210 is used to generate and measure a first weight of the original slurry, transmit the first weight to the second control unit 290, and flow the test slurry into the suction filtration measurement unit 230. The test slurry is part or all of the original slurry.

[0158] The filtration measurement unit 230 is used to perform vacuum filtration on the test slurry to generate an initial filter cake and a filtered filtrate. It also measures the weight change data of the test filter cake before and after drying, as well as a second weight of the filtrate, and transmits the weight change data and the second weight to the second control unit 290. The test filter cake is part or all of the initial filter cake.

[0159] The second particle size measuring unit 250 is used to measure the second slurry particle size of the original slurry.

[0160] The second thickness visual recognition unit 270 is used to recognize the thickness of the initial filter cake and transmit the thickness to the second control unit 290 .

[0161] The second control unit 290 is configured to construct a preset moisture content determination algorithm based on the first weight, the second weight, the weight change data, the thickness, the second preset filter medium surface area, and the second slurry particle size.

[0162] Exemplarily, the filtration test device is used to simulate the filtration process of an actual vacuum drum filter and, during the specific filtration simulation test, establish a preset moisture content determination algorithm. The filtration measurement unit 230 maintains the same filling method, filtration method, and other methods as an actual vacuum drum filter.

[0163] In some embodiments, the second particle size measurement unit 250 and the first particle size measurement unit 10 of Example 1 are the same device, or the same device can be used. The second thickness visual recognition unit 270 and the first thickness visual recognition unit 20 of Example 1 are the same device, or the same device can be used. The second control unit 290 and the first control unit 30 of Example 1 are the same device, or the same device can be used.

[0164] For example, the second particle size measurement unit 250 and the first particle size measurement unit 10 can both be online particle size measuring instruments, the second thickness visual recognition unit 270 and the first thickness visual recognition unit 20 can both be visual recognition cameras, and the second control unit 290 and the first control unit 30 of Example 1 can both be laptop computers.

[0165] Exemplarily, the slurry generation and measurement unit 210 may generate original slurry based on the precipitation reaction raw materials, and simultaneously measure the generated original slurry to obtain a first weight of the original slurry.

[0166] Exemplarily, the test slurry is part or all of the original slurry. In practical applications, part of the original slurry is generally used as the test slurry to flow into the filtration measurement unit 230 for filtration.

[0167] Exemplarily, the filtration measurement unit 230 can filter the test slurry and, simultaneously, measure the weight change data of the test filter cake generated after the filtration before and after drying, as well as the second weight of the filtrate. The test filter cake can be part or all of the initial filter cake. In practical applications, drying a portion of the initial filter cake is generally sufficient. The weight change data determined can also be used in subsequent calculations with substantially the same effect. Using the weight change data of a portion of the initial filter cake can improve drying efficiency and conserve resources.

[0168] Exemplarily, when the filtration test device constructs a preset moisture content determination algorithm, it is based on the functional relationship between the slurry particle size, filter cake density, and moisture content. Therefore, it is necessary to determine the slurry particle size, filter cake density, and moisture content based on the first weight, the second weight, the weight change data, the thickness, the second preset filter medium surface area, and the second slurry particle size. At the same time, through multiple tests, multiple sets of slurry particle sizes, filter cake densities, and moisture contents are obtained to calculate the functional relationship between the slurry particle size, filter cake density, and moisture content, and then construct a preset moisture content determination algorithm.

[0169] The vacuum filtration test device of the embodiment is based on the feature that the density of the same filter cake is only affected by particle size, moisture content and filling method. The functional relationship between filter cake density, particle size and moisture content is obtained through vacuum filtration experiment fitting, thereby providing a basis for online monitoring of the moisture content of the filter cake in Embodiment 1. In Embodiment 1, a non-contact online test method can be used, which avoids the influence of the traditional contact test on the normal operation of the filter, at the same time, the moisture content test speed is improved, which is conducive to early intervention of the moisture content not meeting the standard, thereby also improving the stability of the equipment operation.

[0170] As shown in Figure 5 , the figure exemplarily describes a rotational speed of, for example, 300 rad / s (radians per second) and a weight of, for example, 2689.58 g (grams), 515.58 g.

[0171] In some embodiments, the slurry generation measurement unit 210 comprises a slurry generation module and a slurry storage measurement module.

[0172] The inlet end of the slurry generation module and the slurry storage measurement module are connected.

[0173] The outlet end of the slurry storage measurement module is connected to the vacuum filtration measurement unit 230.

[0174] The slurry generation module is used to generate raw slurry and deliver the raw slurry to the slurry storage measurement module.

[0175] The slurry storage measurement module is used to store the raw slurry delivered by the slurry generation module, deliver the test slurry to the vacuum filtration measurement unit 230, and also used to measure the first weight of the stored raw slurry and transmit the first weight to the second control unit 290.

[0176] Exemplarily, the slurry generation module can generate raw slurry based on the precipitation reaction raw materials, and the second particle size measurement unit 250 can be placed in the slurry generation module or outside the slurry generation module to measure the raw slurry in the slurry generation module.

[0177] Exemplarily, the slurry storage measurement module comprises a storage device and a measurement device.

[0178] In some embodiments, the slurry generation module comprises a precipitation reaction raw material storage tank 211, a peristaltic pump 212, a hose, a precipitation reaction container 213 and a stirrer 214.

[0179] The outlet end of the precipitation reaction raw material storage tank 211 is connected to the inlet end of the precipitation reaction container 213 through the hose in sequence.

[0180] The precipitation reaction raw material storage tank 211 delivers the slurry raw material to the precipitation reaction container 213 through the peristaltic pump 212.

[0181] The stirrer 214 is used to stir the slurry raw material flowing into the precipitation reaction container 213 to generate the original slurry.

[0182] The precipitation reaction container 213 delivers the original slurry to the slurry storage measuring module through the overflow outlet.

[0183] The second particle size measuring unit 250 is placed in the precipitation reaction container 213 to measure the second slurry particle size of the original slurry in the precipitation reaction container 213.

[0184] The peristaltic pump 212 can deliver the raw material of the precipitation reaction raw material storage tank 211 to the precipitation reaction container 213 through the hose to react to generate the original slurry.

[0185] The precipitation reaction container 213 can be a precipitation reaction cup, the cup opening of the precipitation reaction cup is the inlet end, and the overflow outlet of the cup opening is the outlet end. The precipitation reaction cup can improve the efficiency of the precipitation reaction, the product recovery rate, and the operation safety.

[0186] The stirrer 214 can be a magnetic stirring type precipitation reactor, and the precipitation reaction container 213 can be placed on the magnetic stirring type precipitation reactor. The magnetic stirring type precipitation reactor can stir the raw material in the precipitation reaction container 213 in a non-contact manner to generate the original slurry, and the stirring method is more convenient.

[0187] The second slurry particle size corresponds to the original slurry, and the original slurry is similar to the slurry stored in the slurry storage container in Embodiment 1.

[0188] In some embodiments, the slurry storage measuring module includes a slurry storage tank 215, a slurry weighing scale 216, a valve 217, and a slurry nozzle 218.

[0189] The upper end interface of the slurry storage tank 215 is connected to the overflow outlet of the precipitation reaction container 213.

[0190] The lower end interface of the slurry storage tank 215 is connected to the slurry nozzle 218 through the valve 217.

[0191] The slurry storage tank 215 is placed on the slurry weighing scale 216.

[0192] The slurry storage tank 215 is used to store the original slurry delivered by the precipitation reaction container 213.

[0193] The valve 217 is used to control the on-off state of the flow path between the slurry storage tank 215 and the slurry nozzle 218.

[0194] The slurry nozzle 218 is used to deliver the test slurry to the suction filtration measurement unit 230 .

[0195] The slurry weighing scale 216 is used to measure a first weight of the original slurry stored in the slurry storage tank 215 and transmit the first weight to the second control unit 290 .

[0196] Exemplarily, the valve 217 may be a ball valve, which has the advantages of fast opening and closing, tight sealing, low flow resistance and long life, thereby improving the opening and closing efficiency and sealing of the filtration test device.

[0197] For example, the slurry nozzle 218 can improve the fluid control effect of the filtration test device and reduce resource consumption through more precise fluid control.

[0198] In some embodiments, the filtration measurement unit includes a vacuum filtration module, a filtrate storage tank, a filtrate weighing scale 235 and a drying measurement module.

[0199] The slurry inlet end of the vacuum filtration module corresponds to the slurry nozzle 218, and the filtrate outlet end of the vacuum filtration module is connected to the lower end interface of the filtrate storage tank.

[0200] The upper end interface of the filtrate storage tank is connected to the negative pressure supply end of the vacuum filtration module.

[0201] The filtrate storage tank is placed on the filtrate weighing scale 235 .

[0202] The drying measurement module is connected to the second control unit 290 .

[0203] The filtrate storage tank is used to store the filtrate generated after the vacuum filtration module filters the test filtrate.

[0204] The filtrate weighing scale 235 is used to measure the second weight of the filtrate stored in the filtrate storage tank and transmit the second weight to the second control unit 290 .

[0205] The second thickness visual recognition unit 270 is used to recognize the thickness of the initial filter cake generated by filtration in the vacuum filtration module and transmit the thickness to the second control unit 290 .

[0206] The drying measurement module is used to dry the test filter cake, measure the weight change data of the test filter cake before and after drying, and transmit the weight change data to the second control unit 290 .

[0207] For example, the vacuum filtration module has a similar filtration method to that of a vacuum drum filter, both of which adopt negative pressure vacuum filtration.

[0208] Exemplarily, the drying measurement module is Figure 5Not shown in the figure, the drying measurement module measures the weight change data of the test filter cake before and after drying to determine the moisture content of the test filter cake.

[0209] In some embodiments, the vacuum filtration module includes: a vacuum filtration stand 231 , a negative pressure buffer tank 232 , and a negative pressure source 233 .

[0210] The vacuum filtration stand 231 is placed directly below the slurry nozzle 218, and the lower end interface of the vacuum filtration stand 231 is connected to the lower end interface of the filtrate storage tank. The vacuum filtration stand 231 is generated based on the vacuum drum filter structure.

[0211] One end of the negative pressure buffer tank 232 is connected to the upper end interface of the filtrate storage tank.

[0212] The other end of the negative pressure buffer tank 232 is connected to the negative pressure source 233 .

[0213] The negative pressure source 233 and the negative pressure buffer tank 232 are used to provide negative pressure to the vacuum filtration stand 231 so that the vacuum filtration stand 231 filters the test filtrate flowing out of the slurry nozzle 218 to generate an initial filter cake.

[0214] For example, Figure 6 As shown, the vacuum filtration stand 231 is composed of a filtration funnel base 2311, a second filter medium 2313, and a steel structure stand. The second filter medium 2313 is the same as the first filter medium of the vacuum drum filter, and the funnel outlet pipe diameter is the same as the filtration pipe of the filter assembly of the vacuum drum filter, so that the filtration effect of the vacuum drum filter can be better imitated.

[0215] In some embodiments, the drying measurement module includes: a drying oven and a filter cake weighing scale.

[0216] The filter cake weighing scale is connected to the second control unit 290 .

[0217] The oven is used to dry the test filter cake.

[0218] The filter cake weighing scale is used to measure the weight change data of the test filter cake before and after drying, and transmit the weight change data to the second control unit 290 .

[0219] For example, when the test filter cake is dried in an oven, an operator may place the test filter cake into the oven, or a conveying device, such as a robot, may be used to convey the test filter cake into the oven.

[0220] In order to further describe the filtration test device provided by the embodiment, the test process will be described in detail below. The sedimentation reaction container 213 of the embodiment adopts a sedimentation reaction cup, the valve 217 adopts a ball valve, the stirrer 214 adopts a magnetic stirring type sedimentation reactor, the second particle size measuring unit 250 adopts an online particle size measuring instrument, the second thickness visual recognition unit 270 adopts a visual recognition camera, and the second control unit 290 adopts a notebook computer. The connection relationship of the filtration test device can be referred to Figure 5 .

[0221] First step: The outlet of the sedimentation reaction raw material storage tank 211 is guided to the sedimentation reaction cup by a hose, and the hose passes through the peristaltic pump 212 for controlling the flow speed.

[0222] Second step: The online particle size instrument is placed in the sedimentation reaction cup for testing the slurry particle size.

[0223] Third step: The sedimentation reaction cup is placed on the magnetic stirring type sedimentation reactor, and the slurry storage tank 215 is placed on the slurry weighing scale 216.

[0224] Fourth step: The overflow outlet of the sedimentation reaction cup is connected to the upper end interface of the slurry storage tank 215, and the lower end interface of the slurry storage tank 215 is connected to the slurry nozzle 218 with a ball valve in between.

[0225] Fifth step: The vacuum filtration rack 231 is placed directly below the slurry nozzle 218, and the lower end interface of the vacuum filtration rack 231 is connected to the lower end interface of the filtrate storage tank 234.

[0226] Sixth step: The filtrate storage tank 234 is placed on the filtrate weighing scale 235, the upper end interface of the filtrate storage tank is connected to the negative pressure buffer tank 232, and the negative pressure buffer tank 232 is connected to the negative pressure source 233.

[0227] Seventh step: The visual recognition camera is aimed at the vacuum filtration rack 231 for recognizing the filter cake thickness, and the data transmission lines of the online particle size instrument, the slurry weighing scale 216, the visual recognition camera, and the filtrate weighing scale 235 are connected to the notebook computer, and the notebook computer is used to collect data.

[0228] Eighth step: The raw materials required for the slurry sedimentation reaction are configured and placed in the sedimentation reaction raw material storage tank 211 respectively.

[0229] Ninth step: The ball valve is closed, the stirring speed of the magnetic stirring type sedimentation reactor is set, and the peristaltic pump 212 is turned on. The solution in the reaction cup is stirred to continuously generate a sediment, and the slurry particle size μ measured by the online particle size instrument is recorded. When the slurry level exceeds the overflow port of the sedimentation reaction cup, the slurry overflows into the slurry storage tank 215.

[0230] Step 10: When the weight of the slurry storage tank 215 reaches a predetermined value, the peristaltic pump 212 is turned off, and the outlet ball valve of the slurry storage tank 215 is opened to allow the slurry to flow through the slurry nozzle 218 to the vacuum filtration stand 231. The predetermined value can be set according to actual measurements.

[0231] Step 11: When the reading on the slurry weighing scale 216 does not change, close the ball valve and record the weight change of the slurry weighing scale 216. The above weight change is the weight A of the slurry entering the vacuum filtration stand 231.

[0232] Step 12: Adjust the negative pressure source 233 to a lower negative pressure value, filter until the reading of the filtrate weighing scale 235 does not change, record the filtrate weight M1 and identify the filter cake thickness H1 through the visual recognition camera.

[0233] Step 13: Slightly increase the negative pressure value of the negative pressure source 233 and continue filtration.

[0234] Step 14: Repeat step 13 several times and record the weight of the filtrate M2, M3, M4... and the thickness of the filter cake H2, H3, H4... each time until the negative pressure value of the negative pressure source 233 is increased and the reading of the filtrate weighing scale 235 does not change. Record the final filtrate weight M n and filter cake thickness H n .

[0235] Step 15: Slurry weight A and filtrate weight (M1, M2, M3...M n ) to calculate the weight of each filter cake (A-M1, A-M2, A-M3…AM n ), the filter cake thickness (H1, H2, H3…H n ) multiplied by the preset filter medium surface area S to obtain the filter cake volume (V1, V2, V3…V n ), the density of the filter cake is obtained by the ratio of the filter cake weight to the volume ρ1, ρ2, ρ3…ρ n .

[0236] Step 16: The final M n Take out X weight from the filter cake and put it into the oven to dry until the weight is constant Y. The weight loss XY is the weight of water in the filter cake. Divide the mass of water in the sampled filter cake XY by the weight of the sampled filter cake X to get the moisture content of the final filter cake ξ n .

[0237] Step 17: Final moisture content of filter cake ξ n Multiply the filter cake weight m n Obtain the weight B of water in the slurry.

[0238] Step 18: Subtract the weight of each filtrate (M1, M2, M3...M from the weight of water in the slurry (B)n ), and obtain the weight of water in each filter cake: B-M1, B-M2, B-M3...BM n .

[0239] Step 19: The weight of water in the filter cake (B-M1, B-M2, B-M3...BM n ) divided by the filter cake weight (m1, m2, m3…m n ), and obtain the moisture content of each filter cake ξ1, ξ2, ξ3…ξ n .

[0240] Step 20: The density of the filter cake obtained above is ρ1, ρ2, ρ3…ρ n and filter cake moisture content ξ1, ξ2, ξ3…ξ n , the functional relationship between the moisture content and density of the filter cake at a certain particle size is formed by fitting.

[0241] Step 21: Repeat steps 8 to 20, and obtain slurries of different particle sizes by adjusting the stirring speed of the magnetic stirring precipitation reactor and the feeding speed of the peristaltic pump 212 in step 9, and then obtain the relationship between the moisture content and density of the material at different particle sizes. Taking the particle size as a variable, obtain the functional relationship ρ(μ, ξ) between density, particle size, and moisture content.

[0242] After the functional relationship is determined, it can be applied to the moisture content monitoring process in Example 1, as shown in steps 22 to 24.

[0243] Step 22: Place the online particle size measuring instrument in the slurry storage container (precipitation slurry reactor or storage tank) upstream of the vacuum drum filter, aim the visual recognition camera at the deliquescence end point of the vacuum drum filter, and transmit the data collected by the above online particle size measuring instrument and visual recognition camera to the laptop computer.

[0244] Step 23: When the vacuum drum filter is operating normally, the solid content of the slurry entering each filter component is calculated by the slurry flow rate, slurry solid content and vacuum drum filter speed. The filter cake thickness H is obtained by visual recognition camera recognition. a , the slurry particle size μ is measured by online particle size analyzer a , filter cake thickness H a Multiply the filter medium surface area S to get the filter cake volume V a The solid content entering each filter element is divided by the filter cake volume to obtain the filter cake density ρ a .

[0245] Step 24: According to the functional relationship between the density of the material and the particle size and moisture content ρ(μ, ξ), density ρ a and slurry particle size μ a , calculate the moisture content of the filter cake.

[0246] Before the first step, a vacuum filtration rack is made, which is composed of a filtration funnel base, a filter medium and a steel structure rack. The filter medium is the same as that of the vacuum drum filter, the outlet pipe diameter of the funnel is the same as the filtration pipe of the vacuum drum filter, and the filtration area is the same as the actual filtration area of the vacuum drum filter.

[0247] The online particle size analyzer, the filtrate weighing scale and the visual recognition camera are all radiation-resistant and acid and alkali-resistant, so that they can be repaired and replaced in a radiation environment. The three measuring devices represent the slurry particle size, the filtrate weight and the filter cake thickness, and their measuring accuracies are ±8 μm (micrometer), ±0.1 g (gram) and ±1 mm (millimeter) respectively. Without contacting the filter cake, the moisture content of the filter cake of the vacuum drum filter is monitored.

[0248] The data calculation is performed by using a notebook computer, so that the calculation speed is improved and the moisture content is monitored in real time.

[0249] The test method and the monitoring method of the embodiment utilize the feature that the density of the same filter cake is only affected by the particle size, the moisture content and the filling mode. The vacuum filtration rack ensures that the filling mode of the filter cake is consistent with that of the vacuum drum filter. The function relationship ρ(μ, ξ) between the filter cake density, the particle size and the moisture content is obtained by fitting the vacuum filtration experiment. When the vacuum drum filter is normally operated, the particle size of the filter cake (i.e. the aforementioned slurry particle size) and the filter cake density are obtained by using the online particle size analyzer and the visual recognition, and are brought into the fitted function to realize the online monitoring of the moisture content of the filter cake. By using the non-contact online test method, the influence of the traditional contact test on the normal operation of the filter is avoided. At the same time, the online test improves the test speed of the moisture content, which is conducive to early intervention of the non-standard moisture content and improves the operation stability of the equipment.

[0250] It can be understood that the above embodiments are only exemplary embodiments for illustrating the principles of the application, and the application is not limited thereto. Various modifications and improvements can be made by those of ordinary skill in the art without departing from the spirit and essence of the application, and these modifications and improvements are also considered as the protection scope of the application.

Claims

1. A filter cake moisture content monitoring device, characterized in that: include: a first particle size measurement unit, a first thickness visual recognition unit, and a first control unit; The first particle size measurement unit is placed in a slurry storage container upstream of the vacuum drum filter; The first control unit is connected to the first particle size measurement unit and the first thickness visual recognition unit respectively; The first thickness visual recognition unit is used to identify the filter cake thickness of the target filter cake and transmit the filter cake thickness to the first control unit; the target filter cake is located at the end position of the filter cake dehydration zone of the vacuum drum filter; The first particle size measuring unit is used to measure a first slurry particle size of the slurry in the slurry storage container and transmit the first slurry particle size to the first control unit; The first control unit is used to determine the filter cake moisture content corresponding to the target filter cake based on the first slurry particle size, the filter cake thickness, preset filtration-related data and a preset moisture content determination algorithm; the preset filtration-related data is related to the vacuum drum filter.

2. The device according to claim 1, characterized in that The first particle size measurement unit is an online particle size measurement instrument; The first thickness visual recognition unit is a visual recognition camera; The visual recognition camera is used to photograph the target filter cake to identify the filter cake thickness of the target filter cake.

3. The device according to claim 1, characterized in that The preset filtration-related data includes: a first preset filter medium surface area and a first slurry solid content; the first preset filter medium surface area corresponds to the filter assembly in the vacuum drum filter; the first slurry solid content is the slurry solid content of the filter assembly in the vacuum drum filter; When determining the filter cake moisture content corresponding to the target filter cake according to the first slurry particle size, the filter cake thickness, preset filtration-related data, and a preset moisture content determination algorithm, the first control unit is specifically configured to: calculating the product of the filter cake thickness and the first predetermined filter medium surface area to generate a filter cake volume; calculating a quotient between the solid content of the first slurry and the volume of the filter cake to generate a corresponding filter cake density; The filter cake density and the first slurry particle size are input into a preset moisture content determination algorithm to generate the corresponding filter cake moisture content.

4. The device according to claim 3, characterized in that The first control unit is further configured to: The first slurry solid content is calculated based on the slurry flow rate, the second slurry solid content and the vacuum drum filter speed; the slurry flow rate and the second slurry solid content are related to the slurry flowing from the slurry storage container into the vacuum drum filter.

5. A filter cake moisture content monitoring method, characterized in that: Based on the filter cake moisture content monitoring device according to any one of claims 1 to 4, the method is applied to the first control unit in the filter cake moisture content monitoring device, and the method includes: receiving a first slurry particle size transmitted by a first particle size measurement unit; the first slurry particle size is generated by the first particle size measurement unit measuring the slurry in the slurry storage container; the slurry storage container is located upstream of the vacuum drum filter; receiving a filter cake thickness transmitted by a first thickness visual recognition unit; the filter cake thickness is generated after the first thickness visual recognition unit recognizes the thickness of a target filter cake; the target filter cake is located at an end position of a filter cake dehydration zone of the vacuum drum filter; The filter cake moisture content corresponding to the target filter cake is determined according to the first slurry particle size, the filter cake thickness, preset filtration-related data and a preset moisture content determination algorithm; the preset filtration-related data is related to the vacuum drum filter.

6. A filter cake moisture content monitoring system, characterized in that: include: A vacuum drum filter, a slurry storage container, and a filter cake moisture content monitoring device according to any one of claims 1 to 4; The slurry storage container is connected to the vacuum drum filter; The slurry storage container is used to store the slurry and transfer the slurry to the vacuum drum filter, so as to filter the slurry through the vacuum drum filter to generate a target filter cake; The filter cake moisture content monitoring device is used to measure the first slurry particle size of the slurry in the slurry storage container and identify the filter cake thickness of the target filter cake; The filter cake moisture content monitoring device is also used to determine the filter cake moisture content corresponding to the target filter cake based on the first slurry particle size, the filter cake thickness, preset filtration-related data and a preset moisture content determination algorithm; the preset filtration-related data is related to the vacuum drum filter.

7. A filtration test device, characterized in that: include: a slurry generation measurement unit, a suction filtration measurement unit, a second particle size measurement unit, a second thickness visual recognition unit, and a second control unit; The slurry generation measurement unit is connected to the suction filtration measurement unit; The second control unit is respectively connected to the slurry generation measurement unit, the suction filtration measurement unit, the second particle size measurement unit and the second thickness visual recognition unit; The slurry generation and measurement unit is used to generate and measure a first weight of the original slurry, transmit the first weight to the second control unit, and flow the test slurry into the suction filtration measurement unit; the test slurry is part or all of the original slurry; The filtration measurement unit is used to perform vacuum filtration on the test slurry to generate an initial filter cake and a filtered filtrate, measure weight change data of the test filter cake before and after drying, and measure a second weight of the filtrate, and transmit the weight change data and the second weight to the second control unit; the test filter cake is part or all of the initial filter cake; The second particle size measuring unit is used to measure the second slurry particle size of the original slurry; The second thickness visual recognition unit is used to recognize the thickness of the initial filter cake and transmit the thickness to the second control unit; The second control unit is configured to construct a preset moisture content determination algorithm based on the first weight, the second weight, the weight change data, the thickness, a second preset filter medium surface area, and a second slurry particle size.

8. The device according to claim 7, characterized in that The slurry generation and measurement unit includes: a slurry generation module and a slurry storage and measurement module; The slurry generation module is connected to the inlet end of the slurry storage and measurement module; The outlet end of the slurry storage measurement module is connected to the suction filtration measurement unit; The slurry generation module is used to generate the original slurry and transport the original slurry to the slurry storage and measurement module; The slurry storage and measurement module is used to store the original slurry delivered by the slurry generation module, deliver the test slurry to the suction filtration measurement unit, and measure a first weight of the stored original slurry and transmit the first weight to the second control unit.

9. The device according to claim 8, characterized in that The slurry generation module includes: a precipitation reaction raw material storage tank, a peristaltic pump, a hose, a precipitation reaction container and a stirrer; The outlet of the precipitation reaction raw material storage tank is connected to the peristaltic pump and the inlet of the precipitation reaction container in sequence through a hose; the overflow outlet of the precipitation reaction container is connected to the inlet of the slurry storage and measurement module; The precipitation reaction raw material storage tank transports the slurry raw material to the precipitation reaction container through the peristaltic pump; The stirrer is used to stir the slurry raw material flowing into the precipitation reaction container to generate the original slurry; The precipitation reaction container transports the original slurry to the slurry storage and measurement module through the overflow outlet; The second particle size measurement unit is suspended in the precipitation reaction container to measure a second slurry particle size of the original slurry in the precipitation reaction container.

10. The device according to claim 9, characterized in that The slurry storage and measurement module includes: a slurry storage tank, a slurry weighing scale, a valve and a slurry nozzle; The upper end interface of the slurry storage tank is connected to the overflow outlet of the precipitation reaction container; The lower end interface of the slurry storage tank is connected to the slurry nozzle through the valve; The slurry storage tank is placed on the slurry weighing scale; The slurry storage tank is used to store the original slurry delivered by the precipitation reaction vessel; The valve is used to control the on-off state of the flow path between the slurry storage tank and the slurry nozzle; The slurry nozzle is used to transport the test slurry to the suction filtration measurement unit; The slurry weighing scale is used to measure a first weight of the original slurry stored in the slurry storage tank, and transmit the first weight to a second control unit.

11. The device according to claim 10, characterized in that The filtration measurement unit includes a vacuum filtration module, a filtrate storage tank, a filtrate weighing scale and a drying measurement module; The slurry inlet end of the vacuum filtration module corresponds to the slurry nozzle, and the filtrate outlet end of the vacuum filtration module is connected to the lower end interface of the filtrate storage tank; The upper end interface of the filtrate storage tank is connected to the negative pressure providing end of the vacuum filtration module; The filtrate storage tank is placed on the filtrate weighing scale; The drying measurement module is connected to the second control unit; The filtrate storage tank is used to store the filtrate generated after the vacuum filtration module filters the test filtrate; The filtrate weighing scale is used to measure a second weight of the filtrate stored in the filtrate storage tank and transmit the second weight to the second control unit; The second thickness visual recognition unit is used to identify the thickness of the initial filter cake generated by filtration by the vacuum filtration module and transmit the thickness to the second control unit; The drying measurement module is used to dry the test filter cake, measure weight change data of the test filter cake before and after drying, and transmit the weight change data to the second control unit.

12. The device according to claim 11, characterized in that The vacuum filtration module includes: a vacuum filtration stand, a negative pressure buffer tank and a negative pressure source; The vacuum filtration stand is placed directly below the slurry nozzle, and the lower end interface of the vacuum filtration stand is connected to the lower end interface of the filtrate storage tank; the vacuum filtration stand is generated based on the structure of a vacuum drum filter; One end of the negative pressure buffer tank is connected to the upper end interface of the filtrate storage tank; The other end of the negative pressure buffer tank is connected to the negative pressure source; The negative pressure source and the negative pressure buffer tank are used to provide negative pressure to the vacuum filtration stand, so that the vacuum filtration stand filters the test filtrate flowing out of the slurry nozzle to generate the initial filter cake.

13. The device according to claim 11, characterized in that The drying measurement module includes: a drying oven and a filter cake weighing scale; The filter cake weighing scale is connected to the second control unit; The oven is used to dry the test filter cake; The filter cake weighing scale is used to measure weight change data of the test filter cake before and after drying, and transmit the weight change data to the second control unit.

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