Ore pulp sample preparation device, ore pulp ash content meter and ore pulp ash content detection method

Abstract

This disclosure relates to the field of ash content detection technology, specifically to a slurry sample preparation device, a slurry ash analyzer, and a slurry ash content detection method. The slurry sample preparation device includes a dilution device, a dewatering device, and a water purification device. The dilution device includes a mixing tank and a dosing device. The water purification device includes a storage tank located behind the dilution device for storing purified water, a buffer tank located below the dilution and dewatering devices for storing wastewater, and a filter located on one side of the storage tank for receiving and filtering the wastewater in the buffer tank. This disclosure allows for a smaller overall size of the slurry sample preparation device, effectively saving space. This disclosure increases the adaptability of the slurry sample preparation device to different slurry concentrations, ensures the consistency of cake sample thickness, and improves the accuracy of ash content detection. The dosing device can flocculate small particles in the slurry, enhance solid-liquid separation capability, increase the adaptability to different slurries, and enable water recycling, reducing water waste.

Description

Technical Field

[0001] This invention relates to the field of ash content detection technology, specifically to a slurry sample preparation device, a slurry ash analyzer, and a slurry ash content detection method. Background Technology

[0002] Ash content detection uses techniques such as X-ray fluorescence to determine the composition of combustible materials like coal by analyzing the inorganic components remaining after high-temperature combustion. For coal ash, which is the mineral residue remaining after complete combustion under specified conditions, ash content detection allows for a more accurate assessment of coal quality, providing significant guidance for subsequent mining and sorting processes. For ash content detection in flotation concentrate, the slurry is typically dewatered and prepared into cakes. The composition of the slurry is then analyzed by examining the cake samples. However, due to the unknown concentration of the slurry, it's difficult to ensure consistent cake thickness during dewatering and preparation, leading to significant detection errors and affecting the accuracy of ash content analysis. Furthermore, the presence of tiny hydrophilic particles in the slurry can cause these particles to become trapped in the sample preparation apparatus, affecting the preparation process and potentially causing sample failure. Additionally, slurry sample preparation instruments consume a high amount of water, resulting in significant water waste. Furthermore, the currently used slurry sample preparation instruments and slurry ash analyzers are relatively complex in structure and large in size, resulting in them occupying a large space and having poor flexibility. Summary of the Invention

[0003] To overcome the problems existing in the related technologies, an exemplary embodiment of this disclosure provides a slurry sample preparation apparatus in a first aspect, comprising: a dilution device including: a stirring tank with a slurry inlet at the top and a slurry outlet at the bottom, wherein a dilution inlet for adding clean water into the stirring tank is provided on the upper circumference of the stirring tank, the stirring tank being used for stirring to dilute the slurry; a dosing device connected to the stirring tank for delivering flocculant to the stirring tank; a dewatering device disposed in front of the dilution device and connected to the stirring tank for receiving the diluted slurry and dewatering the slurry to prepare cake samples; and a water purification device for receiving the wastewater discharged from the dewatering device and purifying the wastewater. Water, for supplying clean water to at least the dilution device, includes: a water storage tank, disposed behind the dilution device, the water storage tank being connected at least to the stirring tank, for storing purified clean water and supplying clean water to the stirring tank; a buffer tank, generally in the shape of an inverted cone, located below the dilution device and the dehydration device, and the cross-section of the upper part of the buffer tank covering the projection of the dilution device and the dehydration device in the vertical direction, the buffer tank being used to store wastewater; and a filter, disposed on one side of the water storage tank, one end connected to the buffer tank and the other end connected to the water storage tank, for receiving and filtering the wastewater in the buffer tank and conveying the filtered clean water to the water storage tank.

[0004] In some embodiments, the dosing device further includes: a reagent tank, arranged in parallel with the mixing tank, for storing the flocculant; and a metering pump, disposed in the connection passage between the reagent tank and the mixing tank, for controlling the amount of flocculant entering the mixing tank from the reagent tank.

[0005] In some embodiments, the dilution device further includes a slurry pump disposed below the mixing tank and located behind the dewatering device, wherein the inlet end of the slurry pump is connected to the mixing tank and the outlet end of the slurry pump is connected to the dewatering device.

[0006] In some embodiments, the water purification device further includes: a water injection pump disposed below the mortar pump, located behind the dewatering device and in front of the water storage tank, wherein the inlet end of the water injection pump is connected to the water storage tank, a first branch of the outlet end of the water injection pump is connected to the mixing tank, a second branch of the outlet end of the water injection pump is connected to the filter, and a third branch of the outlet end of the water injection pump is connected to the water storage tank.

[0007] In some embodiments, the water purification device further includes: a high-pressure water storage tank, disposed on one side of the water storage tank and located in front of the filter, wherein a fourth branch of the outlet end of the water injection pump is connected to the high-pressure water storage tank to maintain stable water pressure at the outlet end of the water injection pump.

[0008] In some embodiments, the water purification device further includes a buffer pump disposed below one side of the buffer tank, the inlet end of the buffer pump being connected to the buffer tank, and the outlet end of the buffer pump being connected to the filter.

[0009] In some embodiments, the dewatering device includes: a support frame disposed on the front side of the dilution device, the support frame including at least an upper layer and a lower layer; a material cylinder disposed on the upper layer of the support frame, the upper part of the material cylinder communicating with the stirring tank and the bottom communicating with the buffer tank; a vacuum tank disposed on the lower layer of the support frame, located below the material cylinder and communicating with the material cylinder; and a vacuum pump disposed on the lower layer of the support frame, located on one side of the vacuum tank, for evacuating the vacuum tank to separate the slurry in the material cylinder into solid and liquid components.

[0010] Secondly, this disclosure also provides a slurry ash analyzer, comprising: a slurry sample preparation device as described in the first aspect, for preparing slurry into cake samples; and a detection device disposed downstream of the dewatering device for receiving and detecting the cake samples after dewatering.

[0011] Thirdly, this disclosure also provides a method for detecting the ash content of mineral slurry, applied to the mineral slurry ash analyzer as described in the second aspect, comprising: adding the mineral slurry to the mixing tank; when the slurry height in the mixing tank reaches a first height threshold, adding clean water from the water storage tank to the mixing tank; adding flocculant to the mixing tank through the dosing device; the dilution device, in response to receiving a start feeding signal from the dewatering device, adding diluted mineral slurry to the dewatering device; the dilution device, in response to receiving a stop feeding signal from the dewatering device, stopping adding diluted mineral slurry to the dewatering device; dewatering the diluted mineral slurry through the dewatering device to obtain a cake sample, and discharging wastewater to the water purification device; detecting the cake sample through the detection device to determine the ash content of the mineral slurry; and receiving and filtering the wastewater through the water purification device.

[0012] In some embodiments, before adding the slurry to the mixing tank, the slurry ash content detection method further includes: injecting water into the mixing tank to clean it; and discharging the wastewater from cleaning the mixing tank to the buffer tank. Before the dilution device adds diluted slurry to the dewatering device in response to receiving a start-feed signal from the dewatering device, the slurry ash content detection method further includes: injecting water into the dewatering device to clean it; and discharging the wastewater from cleaning the dewatering device to the buffer tank.

[0013] In some embodiments, the slurry ash content detection method further includes: in response to the filter's operating time reaching a first time threshold, injecting water into the filter from the water storage tank to clean the filter;

[0014] Wastewater from cleaning the filter is discharged from the equipment.

[0015] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure.

[0016] According to the slurry sample preparation apparatus provided in this disclosure, the overall volume of the apparatus is reduced by optimizing the installation positions of the dilution device, dewatering device, and water purification device, thereby effectively saving space and improving the flexibility of the apparatus. This disclosure enables effective control of slurry concentration through the dilution device, increasing the apparatus's adaptability to different slurry concentrations, ensuring consistent cake thickness, and further improving the accuracy of subsequent ash content detection. The addition of flocculant to the mixing tank via the dosing device effectively coagulates fine particles, reducing filter cloth clogging and sample preparation failures caused by these particles, and effectively increasing the apparatus's adaptability to different ash contents. Furthermore, the water purification device enables water circulation within the apparatus, allowing for wastewater recycling and reducing water waste. Attached Figure Description

[0017] The invention can be better understood by describing exemplary embodiments of the invention in conjunction with the accompanying drawings, in which:

[0018] Figure 1 This is a schematic diagram of a slurry sample preparation apparatus according to an exemplary embodiment disclosed in a book.

[0019] Figure 2 This is a schematic diagram of a slurry sample preparation apparatus according to another exemplary embodiment disclosed herein;

[0020] Figure 3 This is a schematic diagram of a slurry sample preparation apparatus according to another exemplary embodiment disclosed herein;

[0021] Figure 4 This is a schematic diagram of a slurry sample preparation apparatus according to another exemplary embodiment disclosed herein;

[0022] Figure 5 This is a front view of a slurry sample preparation apparatus shown according to another exemplary embodiment disclosed;

[0023] Figure 6 This is a top view of a slurry sample preparation apparatus shown according to another exemplary embodiment disclosed;

[0024] Figure 7 This is a left view of a slurry sample preparation apparatus shown according to another exemplary embodiment disclosed;

[0025] Figure 8 This is a right view of a slurry sample preparation apparatus shown according to another exemplary embodiment disclosed;

[0026] Figure 9 This is a schematic diagram of a slurry sample preparation apparatus according to another exemplary embodiment disclosed herein;

[0027] Figure 10 This is a front view of a dehydration apparatus shown according to another exemplary embodiment disclosed;

[0028] Figure 11 This is a front view of a dehydration apparatus shown according to another exemplary embodiment disclosed;

[0029] Figure 12 This is a rear view of a dehydration apparatus shown according to another exemplary embodiment disclosed;

[0030] Figure 13 This is a schematic diagram of the structure of a slurry ash analyzer according to another exemplary embodiment disclosed;

[0031] Figure 14This is a flowchart illustrating a method for detecting ash content in mineral slurry according to an exemplary disclosed invention;

[0032] Figure 15 This is a flowchart illustrating a method for detecting ash content in slurry according to another exemplary disclosure;

[0033] Figure 16 This is a flowchart illustrating a method for detecting ash content in slurry according to another exemplary disclosure;

[0034] Figure 17 This is a flowchart illustrating a method for detecting ash content in slurry according to another exemplary disclosure. Detailed Implementation

[0035] The following describes specific embodiments of the present invention. It should be noted that, in order to provide a concise description, this specification cannot exhaustively describe all features of the actual embodiments. It should be understood that, in the actual implementation of any embodiment, just as in any engineering or design project, various specific decisions are often made to achieve the developer's specific goals and to meet system-related or business-related constraints, and this can change from one embodiment to another. Furthermore, it is understood that although the efforts made in this development process may be complex and lengthy, for those skilled in the art related to the content disclosed in this invention, some design, manufacturing, or production modifications based on the technical content disclosed herein are merely conventional technical means and should not be construed as insufficient content of this disclosure.

[0036] Unless otherwise defined, the technical or scientific terms used in the claims and description shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in the patent application description and claims of this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. The terms "an" or "a" and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including" and similar terms mean that the element or object preceding "comprising" or "including" encompasses the element or object listed following "comprising" or "including" and its equivalents, and do not exclude other elements or objects. The terms "connected" or "linked" and similar terms are not limited to physical or mechanical connections, nor are they limited to direct or indirect connections.

[0037] To address the aforementioned technical problems, this disclosure provides a slurry sample preparation apparatus, which may include: a dilution device, a dewatering device 120, and a water purification device. The dilution device may include a mixing tank 111 and a dosing device. Figure 1 , Figure 2 As shown, the dosing device and the mixing tank 111 can be arranged side by side, and the dosing device and the mixing tank 111 are connected to each other so that the dosing device can add flocculant into the mixing tank 111.

[0038] The mixing tank 111 has a slurry inlet at the top and a slurry outlet at the bottom. A dilution inlet for adding clean water into the mixing tank 111 is located on the upper circumference. The mixing tank 111 is used for stirring to dilute the slurry. Figures 1 to 2 As shown, the top of the mixing tank 111 has a slurry inlet, which can be connected to an external feeding device, allowing the slurry to enter the mixing tank 111 through the slurry inlet. A dilution water inlet is also provided on the upper periphery of the mixing tank 111, which can be connected to a water purification device, allowing purified water from the device to enter the mixing tank 111 through the dilution water inlet and mix with the slurry, thereby diluting the slurry in the mixing tank 111. A stirring paddle can be installed in the mixing tank 111. The rotation of the stirring paddle ensures thorough mixing of the slurry and water in the mixing tank 111, resulting in a more uniform slurry mixture. This leads to a more uniform cake sample produced subsequently, further improving the accuracy of ash content detection. A slurry outlet can be provided at the bottom of the mixing tank 111. After the mixing tank 111 has completed slurry mixing, the bottom slurry outlet can be opened to transport the diluted slurry to the dewatering device 120 for dewatering and cake formation. By setting up the mixing tank 111, the slurry can be fully diluted and stirred evenly, so that the concentration of the slurry can be controlled at a low level. This expands the range of slurry concentrations that the slurry preparation device can adapt to, and enables the slurry preparation device provided in this disclosure to make cakes of uniform thickness for slurries of different concentrations. This further improves the detection accuracy of subsequent cake testing and enhances the accuracy of the slurry ash analyzer.

[0039] In some embodiments, a level gauge may be installed on the top of the mixing tank 111. The level gauge can accurately measure the slurry level in the mixing tank 111, as well as the slurry level after adding water. This allows the slurry and water to be added quantitatively according to the dilution concentration requirements of the slurry preparation device during the process of adding slurry from the slurry inlet into the mixing tank 111, thereby effectively controlling the concentration of the diluted slurry.

[0040] Dosing devices, such as Figure 1-2As shown, the dosing device is connected to the mixing tank 111 and is used to deliver flocculant to the mixing tank 111. The dosing device can be connected to the mixing tank 111 so that the dosing device can deliver flocculant to the mixing tank 111, thereby causing the small particles in the slurry to agglomerate. Since the slurry may contain fine high-ash particles, these particles may include fine hydrophilic particles. Fine hydrophilic particles have a small particle size and strong hydrophilicity, which can easily cause blockage of the relevant structures of the dewatering device 120 during the subsequent sample preparation process, leading to malfunction of the dewatering device 120, affecting the safety of the dewatering device 120, and also easily causing the dewatering device 120 to shut down. In addition, the small particles in the slurry may also include fine hydrophobic particles. These fine hydrophobic particles have a small particle size and poor hydrophilicity, which can easily pass through the dewatering device 120, causing particle loss and affecting the accuracy of subsequent ash content detection. The flocculant is added to the mixing tank 111 via a dosing device. The flocculant causes fine high-ash particles and fine coal powder to flocculate into agglomerates, altering the hydrophilicity and hydrophobicity of the high-ash particles. This allows the liquid in the slurry to separate from the flocculated high-ash particles and fine coal powder. The mixing tank 111 ensures thorough mixing of the flocculant with the slurry and water, enabling the flocculant to further flocculate fine hydrophilic particles in the slurry, effectively improving the solid-liquid separation of the slurry. This prevents free fine hydrophilic particles from affecting subsequent sample preparation and also effectively prevents the outflow of free fine hydrophobic particles, thus ensuring the uniformity and reliability of the slurry sample preparation and the accuracy of slurry testing. This reduces the number of free fine particles in the diluted slurry, allowing them to flocculate into clusters. This effectively minimizes the impact on the subsequent dewatering and cake-making process, avoiding risks such as filter cloth clogging during the dewatering and cake-making process of the slurry through the dewatering device 120. It also effectively improves the operational stability and safety of the slurry preparation device. Furthermore, it enables the preparation of slurries with more different components or containing various fine particles through the slurry preparation device, effectively expanding the application range of the slurry preparation device and improving its versatility.

[0041] A dewatering device 120, located in front of the dilution device and connected to the mixing tank 111, receives the diluted slurry and dewaters it to prepare cake samples. The dewatering device 120 may be positioned in front of the dilution device and may have an inlet for communication with the dilution device, allowing the slurry, after dilution and flocculation by chemicals, to enter the dewatering device 120 from the mixing tank 111 through the inlet. The dewatering device 120 dewaters the liquid slurry and presses it into a solid cake sample for subsequent identification and testing. The dewatering device 120 separates the slurry into solid and liquid components. After dewatering and sample preparation, the solid cake sample can be transported to a testing device connected to the slurry sample preparation device for analysis of its internal composition; the liquid separated from the slurry can be transferred to a purification device. The dewatering device 120 can be connected to a water purification device, allowing the liquid portion of the slurry separated in the dewatering device 120 to enter the water purification device for filtration and recycling. The dewatering device 120 can form a smooth cake sample from the slurry. Due to the dilution by the dilution device and the flocculation of fine hydrophilic particles, the cake sample produced by the dewatering device 120 has a consistent thickness and is relatively uniform, thus improving the accuracy of subsequent cake sample testing. It also flocculates fine hydrophobic particles, preventing their outflow and ensuring the accuracy of subsequent cake sample testing. Positioning the dewatering device 120 in front of the dilution device effectively saves vertical space in the slurry preparation device, facilitating user adjustment, movement, and maintenance, thus increasing the flexibility of the slurry preparation device. At the same time, it can make the structure of the slurry preparation device more compact and reduce the space occupied by the slurry preparation device, thereby enabling the slurry preparation device to operate in a relatively narrow environment and have better adaptability.

[0042] A water purification device is used to receive and purify the wastewater discharged from the dewatering device 120, so as to supply clean water to at least the dilution device. The water purification device can be connected to the dewatering device 120, so that after the dewatering device 120 completes the dewatering of the slurry, it transports the liquid portion, i.e., wastewater, to the water purification device. The water purification device can receive the wastewater and filter and purify it, ultimately filtering and purifying the wastewater into clean water. This clean water can then re-enter other parts of the slurry preparation device, enabling the water inside the slurry preparation device to be recycled, effectively reducing water waste and making it more environmentally friendly. The water purification device may include: a water storage tank 131, a buffer tank 132, and a filter 133.

[0043] A water storage tank 131, located behind the dilution device, is at least connected to the mixing tank 111 and is used to store purified water and supply water to the mixing tank 111. The water storage tank 131 can be located behind the dilution device and has a large capacity to store the filtered water. Figure 2 As shown, the water storage tank 131 can be rectangular, with a height greater than the mixing tank 111 and the dosing device of the dilution apparatus, and has a large capacity to hold a certain amount of clean water. The water storage tank 131 can be connected to the mixing tank 111, allowing the water storage tank 131 to supply clean water to the mixing tank 111 to dilute the slurry inside the mixing tank 111. A level gauge can be installed on the top of the water storage tank 131 to detect the liquid level in the water storage tank 131, so as to determine the amount of clean water in the water storage tank 131 and adjust the water purification rate of the water purification device in real time, thereby ensuring that the amount of clean water in the water storage tank 131 is at least sufficient to supply the mixing tank 111 for slurry dilution.

[0044] The buffer tank 132, shaped like an inverted cone, is located below the dilution and dewatering devices 120. The upper cross-section of the buffer tank 132 covers the vertical projection of the dilution and dewatering devices 120. The buffer tank 132 is used to store wastewater. The buffer tank 132 can be located at the bottom of the overall slurry preparation device. Its inverted cone shape allows the upper cross-sectional area to be larger than the lower cross-sectional area, facilitating the receiving and storage of wastewater from the slurry preparation device for subsequent centralized filtration and purification. The buffer tank 132's location below the dilution and dewatering devices 120, with its upper cross-section completely covering the vertical projection of the dilution and dewatering devices 120, effectively saves space in the slurry preparation device. The dewatering device 120 can be connected to the buffer tank 132, allowing the wastewater generated by the dewatering device 120 from the slurry to flow into the buffer tank 132. Since the dewatering device 120 is positioned above the buffer tank 132, and its projection onto the top surface of the buffer tank 132 is entirely within the top surface area of ​​the buffer tank 132, the pipeline between the dewatering device 120 and the buffer tank 132 can be vertically arranged. This allows the wastewater to flow vertically downwards through the pipeline between the dewatering device 120 and the buffer tank 132 into the buffer tank 132. Because the wastewater may contain some sludge and other impurities, the positional relationship between the dewatering device 120 and the buffer tank 132, and the vertical arrangement of the pipeline between them, avoids bends in the pipeline, further preventing sludge buildup at bends and thus preventing blockages. This ensures the pipeline between the dewatering device 120 and the buffer tank remains unobstructed. This further enhances the safety of the slurry preparation device, extends its service life and that of its pipelines, avoids frequent pipeline replacement and cleaning, and effectively saves costs. Furthermore, by making the buffer tank 132 an inverted cone shape with a large cross-sectional area at its upper part, the vertical dimensions of the buffer tank 132 are effectively reduced while maintaining its capacity. This makes the vertical structure of the slurry preparation device more compact, reducing the space it occupies. This facilitates user adjustment, movement, and maintenance of the slurry preparation device, increasing its flexibility and enabling it to adapt to narrower, lower-ceilinged environments, effectively improving its adaptability.

[0045] Filter 133, such as Figure 1 , Figure 4As shown, a filter 133 is installed on one side of the water storage tank 131, with one end connected to the buffer tank 132 and the other end connected to the water storage tank 131. It is used to receive and filter wastewater in the buffer tank 132 and to transport the filtered clean water to the water storage tank 131. A filter 133 can be installed on one side of the water storage tank 131, and the filter 133 and the water storage tank 131 can be arranged side-by-side. One end of the filter 133 can be connected to the buffer tank 132 to receive wastewater from the buffer tank 132. Since the wastewater may contain impurities such as sediment and sludge, the filter 133 can be equipped with a filter screen, filter cloth, or other filtration structure to separate the impurities from the liquid, thereby filtering the wastewater into clean water. One end of the filter 133 can be connected to the water storage tank 131, allowing the filtered clean water to be transported to the water storage tank 131 for storage. In addition, the filter 133 may be equipped with a drain port located at the bottom of the filter 133 to discharge sludge and other impurities filtered out by the filter 133 to the outside of the slurry preparation device. A drain valve may be installed on the drain port or its connected pipeline. During the wastewater filtration process of the filter 133, the drain valve is closed to prevent the leakage of wastewater or filtered clean water. After the filter 133 completes wastewater filtration and delivers clean water to the storage tank 131, the drain valve can be opened to discharge sludge and other impurities from the filter 133. The filter 133 and the storage tank 131 are connected by a pipeline to facilitate the delivery of filtered clean water from the filter 133 to the storage tank 131. A flow meter may be installed on this pipeline to monitor the current clean water flow rate in real time. Furthermore, a one-way valve may be installed downstream of the flow meter to prevent backflow of clean water, effectively improving the operational stability and safety of the slurry preparation device.

[0046] The slurry sample preparation apparatus provided in this disclosure, by incorporating a dilution device, a dewatering device 120, and a water purification device, achieves a more compact structure, saving space and improving space utilization. Furthermore, it effectively enhances the processing quality, detection accuracy, and operational continuity and stability of the slurry sample. The mixing tank 111, equipped with a stirring paddle, provides continuous and uniform mixing. Combined with precise control via a level gauge, this ensures thorough mixing of the slurry with water and flocculant, guaranteeing good uniformity and thickness consistency in the subsequently prepared cake samples. This prevents the slurry concentration from affecting the accuracy of ash content detection results. The dilution device, through water dilution and the addition of flocculant, significantly expands the applicability of the slurry sample preparation apparatus, enabling it to better adapt to slurry samples with different initial concentrations and mineral compositions. This improves the versatility and adaptability of the slurry sample preparation apparatus in various industrial scenarios. The dewatering device 120 is located in front of the dilution device. The buffer tank 132 adopts an inverted cone design that covers the projected area of ​​the upper and lower devices, making the slurry sample preparation device occupy less vertical space and more compact in structure. This facilitates its placement in space-constrained laboratories or industrial sites, improving the overall flexibility and maintainability of the equipment. Through the coordinated operation of the dewatering device 120, buffer tank 132, and water purification device, wastewater generated during slurry dewatering can be efficiently recovered and filtered. The purified water can be recycled for slurry dilution, significantly reducing water consumption and demonstrating good environmental benefits and sustainable operation capabilities. By placing the buffer tank 132 at the bottom of the device and achieving vertical pipe connection, the risk of sludge accumulation clogging the bends is avoided, improving drainage smoothness during device operation and reducing the failure rate. The filter 133 is equipped with a drain port and drain valve, along with a flow meter and check valve, facilitating regular drainage and flow monitoring, enhancing the stability and convenience of equipment operation.

[0047] In some embodiments, such as Figure 1-2 As shown, the dosing device may also include: a reagent tank 112 and a metering pump 113.

[0048] Medicine container 112, such as Figure 3As shown, a reagent tank 112 is arranged side-by-side with the mixing tank 111 and is used to store flocculant. The reagent tank 112 can be a barrel-shaped element similar in size to the mixing tank 111. The reagent tank 112 can be arranged side-by-side with the mixing tank 111, at the same height, and located in front of the water storage tank 131, just like the mixing tank 111. The reagent tank 112 can be used to contain flocculant, and the concentration of flocculant contained inside the reagent tank 112 before the slurry sample preparation device is in operation can be relatively high. A level gauge can be installed on the top of the reagent tank 112 to detect the height of the flocculant liquid inside the reagent tank 112, so as to determine the remaining amount of flocculant. In addition, a discharge port can be opened at the bottom of the reagent tank 112, through which the flocculant can flow out into the mixing tank 111, so that the flocculant can enter the mixing tank 111 and mix thoroughly with the slurry, thereby achieving a better effect of flocculating fine high-ash particles into agglomerates. This allows the fine hydrophilic particles in the diluted slurry to flocculate into agglomerates, reducing the number of free fine hydrophilic particles in the slurry, effectively reducing the impact on the subsequent dewatering and cake-making process, and avoiding the risk of filter cloth clogging during the dewatering and cake-making process of the slurry through the dewatering device 120. A water inlet can be provided at the top of the reagent tank 112. Since the flocculation effect of the reagent on different fine hydrophilic particles is related to the concentration of the reagent, clean water can be added to the reagent tank 112 through the water inlet to dilute the concentration of the flocculant, thus adapting to various types of fine hydrophilic particles in the slurry. The water inlet can be connected to the water storage tank 131 of the water purification device via a pipeline, so that clean water can be supplied from the water storage tank 131 to the water inlet of the reagent tank 112 to dilute the concentration of the flocculant in the reagent tank 112. A valve can be installed on the pipeline between the reagent tank 112 and the water storage tank 131. When there is no need to dilute the reagent, the valve is closed, preventing water from the water storage tank 131 from entering the reagent tank 112, thus preventing clean water from the water storage tank 131 from entering the reagent tank 112 to dilute the flocculant, thereby effectively maintaining the concentration of the flocculant in the reagent tank 112 and improving the sealing and safety of the reagent tank 112. When dilution of the flocculant is required, the valve can be opened, allowing water from the storage tank 131 to enter the reagent tank 112. This allows the clean water in the storage tank 131 to fully dilute the flocculant in the reagent tank 112, thereby accurately controlling the concentration of the flocculant in the reagent tank 112 and improving the dilution accuracy during the reagent dilution process. This further enables more fine hydrophilic particles to flocculate into clusters when diluting the slurry in the dilution device, effectively improving the purity of the slurry and preventing free fine hydrophilic particles from affecting the subsequent dewatering and cake-making process. It also prevents fine hydrophilic particles from clogging the filter cloth, improving safety.The liquid level gauge at the top of the reagent tank 112 can be used to monitor the change in the liquid level in the reagent tank 112 in real time during the process of adding water to dilute the flocculant concentration. This allows for the determination of the amount of water to be added to the reagent tank 112, providing high accuracy and real-time performance. This enables the quantitative addition of water to dilute the flocculant, resulting in a more accurate dilution concentration. When the flocculant is subsequently transported to the mixing tank 111, this effectively improves the flocculation effect of the flocculant on fine, high-ash particles.

[0049] A metering pump 113 is installed in the connection passage between the reagent tank 112 and the mixing tank 111 to control the amount of flocculant entering the mixing tank 111 from the reagent tank 112. The metering pump 113 is small in size and can be located between the reagent tank 112 and the mixing tank 111, in front of the water storage tank 131. The metering pump 113 can control the amount of flocculant entering the mixing tank 111 from the reagent tank 112, and can also rapidly pump the flocculant from the reagent tank 112 into the mixing tank 111. This allows the flocculant to have a high flow rate in the connection channel between the reagent tank 112 and the mixing tank 111, thereby enabling the flocculant to quickly enter the mixing tank 111 and be flushed into the slurry, achieving thorough mixing with the slurry. This allows the fine hydrophilic particles to flocculate more quickly, further increasing the speed of slurry dilution and flocculation, saving time, and ensuring that the flocculant can achieve flocculation of fine hydrophilic particles more quickly, thus improving the slurry dilution efficiency.

[0050] According to the slurry sample preparation device provided in this embodiment, the dosing device, including a reagent tank 112 and a metering pump 113, not only improves the flocculation efficiency of fine hydrophilic particles in the slurry and reduces the risk of failure of the dewatering device 120, but also significantly improves the flexibility, safety, and accuracy of reagent dosing, thereby enhancing the overall stability and working efficiency of the slurry sample preparation device. The metering pump 113, located between the reagent tank 112 and the mixing tank 111, allows for precise control of the flocculant addition amount and rapid injection of the flocculant into the mixing tank 111 at a high flow rate, achieving rapid mixing of the flocculant and slurry, greatly shortening the time required for the flocculation process and improving sample preparation efficiency. A level gauge installed at the top of the reagent tank 112 allows for real-time monitoring of the flocculant level, facilitating precise control of the remaining flocculant and dilution ratio. Combined with the inlet structure and the connection to the storage tank 131, dynamic adjustment of the flocculant concentration is achieved, enhancing the system's adaptability to different compositions of fine hydrophilic particles in slurries. By connecting the inlet to the water storage tank 131 via a pipeline and equipping it with a valve, clean water can be introduced for precise dilution when needed, avoiding unnecessary concentration fluctuations. This allows the flocculant to consistently achieve better flocculation results, further ensuring the quality of the filter cake during the dewatering stage and the long-term operational stability of the dewatering device 120. The level gauge, valves, and metering pump 113 prevent sample preparation abnormalities caused by excessive dilution or insufficient dosing, while effectively controlling operational risks.

[0051] In some embodiments, such as Figure 3 , Figure 4 As shown, the dilution device may further include a slurry pump 114, located below the mixing tank 111 and behind the dewatering device 120. The inlet end of the slurry pump 114 is connected to the mixing tank 111, and the outlet end of the slurry pump 114 is connected to the dewatering device 120. The slurry pump 114 may be located below the mixing tank 111, in front of the water storage tank 131, and behind the dewatering device 120. The horizontal length of the slurry pump 114 is similar to the length of the mixing tank 111 and the reagent tank 112 arranged side by side. By placing the slurry pump 114 below the mixing tank 111, horizontal space can be effectively saved, making the overall structure of the slurry sample preparation device more compact and occupying less space, thus improving the space utilization rate of the slurry sample preparation device. In addition, because the slurry sample preparation device occupies less space, it can have greater flexibility and versatility, enabling it to adapt to various environments and still be installed and maintain normal operation in relatively narrow spaces.

[0052] According to the slurry sampling apparatus provided in this embodiment, by installing a slurry pump 114 in the dilution device, the overall structural layout of the slurry sampling apparatus can be further optimized while achieving efficient transportation of slurry from the mixing tank 111 to the dewatering device 120. Since the slurry pump 114 is located below the mixing tank 111, in front of the water storage tank 131, and behind the dewatering device 120, it features a compact structure and reasonable layout, significantly reducing the horizontal space occupied by the slurry sampling apparatus and thus improving the overall space utilization rate of the equipment. Furthermore, due to the more compact overall structure, this arrangement effectively reduces the space requirements for the installation environment, improving the adaptability and versatility of the equipment in different industrial sites, such as mine sampling rooms and laboratories, and is particularly suitable for working conditions with limited installation space or complex site environments. At the same time, the position of the slurry pump 114 below the mixing tank 111 facilitates gravity-assisted slurry pumping, improving pumping efficiency and reducing energy consumption, further enhancing the operational stability of the slurry dilution and transportation process.

[0053] In some embodiments, such as Figure 3 , Figure 4 As shown, the water purification device also includes: a water injection pump 134, which is located below the mortar pump 114, behind the dewatering device 120, and in front of the water storage tank 131. The inlet end of the water injection pump 134 is connected to the water storage tank 131. The first branch of the outlet end of the water injection pump 134 is connected to the mixing tank 111. The second branch of the outlet end of the water injection pump 134 is connected to the filter 133. The third branch of the outlet end of the water injection pump 134 is connected to the water storage tank 131. The water injection pump 134 can be located below the mortar pump 114, between the dewatering device 120 and the water storage tank 131, so that the water injection pump 134, the mortar pump 114 and the dilution device are arranged sequentially from bottom to top, and the vertical projections of the water injection pump 134, the mortar pump 114 and the dilution device can all be located within the range of the upper cross section of the buffer tank 132. By placing the water injection pump 134 below the mortar pump 114, the space occupied by the mortar sample preparation device can be further reduced, making the various structures inside the mortar sample preparation device more compact and having higher space utilization efficiency.

[0054] The inlet of the water pump 134 can be connected to the water storage tank 131, allowing clean water in the storage tank 131 to be pumped out through the water pump 134. The outlet of the water pump 134 can have multiple branches. The first branch of the outlet of the water pump 134 can be connected to the mixing tank 111, allowing the water pump 134 to pump clean water from the storage tank 131 to the mixing tank 111, thereby adding water to the mixing tank 111 to dilute the slurry or to clean the mixing tank 111. A valve can be installed on the first branch. When the dilution device is not in the state of diluting slurry or cleaning, the valve can be closed to prevent clean water from entering the mixing tank 111 and causing waste. When the dilution device is in the state of diluting slurry or cleaning, the valve can be opened to allow clean water to enter the mixing tank 111 for timely water supply. The second branch of the outlet of the water pump 134 can be connected to the filter 133. Since filter 133 needs to filter and discharge sludge and other impurities, these impurities may adhere to the inner wall of filter 133, causing blockage of the filter screen or filter cloth and other filter structures. Therefore, filter 133 can be cleaned regularly. A second branch of the outlet section of water pump 134 is connected to filter 133, and a valve is installed on this second branch. When filter 133 is in operation, the valve is closed to prevent clean water from flowing back into filter 133. When filter 133 is in cleaning mode, the valve can be opened, and clean water can be pumped into filter 133 by water pump 134 to achieve the self-cleaning function of filter 133. After filter 133 is cleaned, wastewater can be allowed to settle, removing large solid particles. The wastewater is then returned to buffer tank 132 to achieve wastewater recycling. The filter 133 can be set to timed cleaning. When the filter 133 has been running for longer than a preset time, after completing the treatment of its internal wastewater, the buffer tank 132 can stop supplying wastewater to the filter 133, allowing the water pump 134 to add clean water from the storage tank 131 to the filter 133 for cleaning. Since the filter 133 may malfunction during cleaning, leading to excessive water pressure in the pipeline, a third branch of the water pump 134 outlet can be connected to the storage tank 131. In case of a malfunction during filter 133 cleaning, the water pump 134 can return clean water to the storage tank 131, stabilizing the pressure in the pipeline downstream of the water pump 134. A valve can also be installed on the third branch of the water pump 134. In case of a malfunction during filter 133 cleaning, this valve can be opened, allowing the water pump 134 to pump clean water back to the storage tank 131.

[0055] According to the slurry sample preparation device provided in this embodiment, by placing the water injection pump 134 below the slurry pump 114, and having it, along with the slurry pump 114 and the dilution device, located within the cross-sectional area above the buffer tank 132, the water injection pump 134 and the slurry pump 114 are stacked vertically in an orderly manner. This further reduces the volume occupied by the equipment, improves the compactness of the equipment layout and the space utilization rate, and facilitates installation and transportation. It is especially suitable for mining areas or experimental sites with limited installation space. Water is supplied to the mixing tank 111 through the first branch of the water injection pump 134, which can meet the needs of slurry dilution or cleaning of the mixing tank 111, improving the functional flexibility of the slurry sample preparation device. The valves set in the branch can also precisely control the timing and amount of water supply, avoiding waste of water resources. The filter 133 is connected through the second branch and controlled by valves. The filter 133 can be automatically cleaned at a preset time point or when an increase in filtration resistance is detected, effectively preventing filter screen clogging, extending the service life of the filter 133, and ensuring the continuity and efficiency of wastewater treatment. By connecting the third branch at the outlet of the water injection pump 134 to the water storage tank 131, when an abnormal water pressure occurs during the cleaning process of the filter 133, this branch can be automatically opened to achieve backflow and pressure stabilization, effectively avoiding risks such as pipe bursts and pump damage, and improving the system's anti-interference capability and safety. The wastewater generated after the filter 133 is cleaned is treated by sedimentation and returned to the buffer tank 132, enabling the recycling of water resources. This not only reduces operating costs but also enhances the environmental friendliness of the slurry sample preparation device.

[0056] In some embodiments, such as Figure 1 , Figure 5-7 , Figure 9 As shown, the water purification device may further include: a high-pressure water storage tank 135, disposed on one side of the water storage tank 131 and located in front of the filter 133; a fourth branch of the outlet end of the water injection pump 134 is connected to the high-pressure water storage tank 135 to maintain stable water pressure at the outlet end of the water injection pump 134. The high-pressure water storage tank 135 may be disposed on one side of the water storage tank 131, on the same side as the filter 133. The high-pressure water storage tank 135 may be located in front of the filter 133, so that the high-pressure water storage tank 135 may be located to the side of the mixing tank 111 and the mortar pump 114. The high-pressure water storage tank 135 may be connected to the outlet end of the water injection pump 134 to maintain stable water pressure in the outlet end pipeline of the water injection pump 134. A pressure gauge may also be installed at the outlet end of the hydraulic pump, which can be used to detect the water pressure in the pipeline connected to the outlet end of the water injection pump 134. When the water pressure is too high, the valve on the third branch of the water injection pump 134 can be opened to allow clean water to flow back to the storage tank 131 to stabilize the pressure. When the water pressure is too low, water can be added to the pipeline through the high-pressure storage tank 135 to increase the pipeline water pressure. In this way, the water pressure in each branch at the outlet of the water injection pump 134 of the water purification device can be kept stable.

[0057] According to the slurry sample preparation device provided in this embodiment, by setting a high-pressure water storage tank 135 in the water purification device and connecting it to the outlet end of the water injection pump 134, a closed-loop pressure stabilization system with the high-pressure water storage tank 135 and the water storage tank 131 as dual-end regulators can be formed, which can significantly improve the water pressure stability and operational reliability of the water purification device. When the system water demand suddenly increases and the water pressure drops, the high-pressure water storage tank 135 can immediately release the stored high-pressure clean water to quickly replenish the pressure and avoid equipment shutdown or water supply delay due to insufficient water pressure. When the water pressure is too high, the system can return the water to the water storage tank 131 through a third branch to achieve pressure stabilization. By monitoring the water pressure status at the outlet end of the water injection pump 134 in real time with a pressure gauge, and combining the coordinated control of the high-pressure water storage tank 135 and the return path, problems such as bursting, joint detachment, or equipment damage caused by excessive water pressure in the pipeline can be effectively prevented, thereby improving the overall reliability and service life of the system. The high-pressure water storage tank 135 is located on one side of the water storage tank 131 and in front of the filter 133. It is arranged in parallel with the mixing tank 111 and the mortar pump 114. It can achieve pressure stabilization while saving the space occupied by the slurry sample preparation device, making the overall structure of the water purification device more compact and the functions more complete, and improving the integration and adaptability of the slurry sample preparation device.

[0058] In some embodiments, such as Figure 4 , Figure 7-8 As shown, the water purification device may further include: a buffer pump 136, disposed below one side of the buffer tank 132, with its inlet end connected to the buffer tank 132 and its outlet end connected to the filter 133. The buffer pump 136 can be connected to both the buffer tank 132 and the filter 133, enabling it to pump wastewater stored in the buffer tank 132 into the filter 133 for filtration. A level gauge may be installed on the top of the buffer tank 132 to determine the wastewater level within it. The buffer pump 136 can be started or stopped based on the wastewater level detected by the level gauge. When the wastewater level detected by the level gauge is higher than a first wastewater height threshold of the buffer pump 136, the buffer pump 136 can be activated, allowing the wastewater in the buffer tank 132 to flow into the filter tank for filtration. When the level gauge detects that the wastewater level is below the second wastewater height threshold of the buffer pump 136, the buffer pump 136 can be shut off, and the filter 133 can begin filtering the wastewater inside. In some embodiments, the hydraulic pump pumps the wastewater inside the buffer tank 132 into the filter 133 simultaneously, such as... Figure 13 As shown, the hydraulic pump can also be equipped with a branch line connected to the buffer tank 132. The branch line is equipped with an overflow valve. When the filter 133 is blocked, causing the water pressure in the pipeline connected to the buffer pump 136 to be too high, the water pressure in the pipeline is greater than the threshold of the overflow valve, which can open the overflow valve and discharge the wastewater in the pipeline back to the buffer tank 132, thereby achieving a better pressure stabilization effect.

[0059] According to the slurry sample preparation device provided in this embodiment, by setting a buffer pump 136 in the water purification device and connecting it to the buffer tank 132 and the filter 133, the quantitative delivery and stable filtration treatment of wastewater can be effectively realized, thereby improving the continuity and stability of the water purification process in the slurry sample preparation system. The buffer pump 136 delivers the wastewater in the buffer tank 132 to the filter 133 as needed, enabling the filter 133 to continuously treat the wastewater at a stable and controllable flow rate, avoiding flow fluctuations or sudden increases that may affect the filtration effect. It also ensures that the filter 133 can operate under a reasonable load, extending the service life of the filter 133, reducing maintenance frequency, and saving maintenance costs. When the filter 133 becomes clogged, causing an abnormal increase in water pressure in the pipeline connected to the buffer pump 136, the wastewater can be automatically discharged back to the buffer tank 132 through the set overflow valve branch, effectively preventing pipeline rupture or equipment damage caused by excessive pressure, and significantly enhancing the pressure stabilization and fault mitigation capabilities of the water purification device under extreme operating conditions. This embodiment not only improves the wastewater treatment capacity but also enhances the system's water resource reuse efficiency, resulting in better environmental protection. Positioning the buffer pump 136 below and to the side of the buffer tank 132, connected to the filter 133, not only saves equipment space but also optimizes the wastewater flow path from collection and regulation to filtration, making the overall system layout more rational, the pipeline shorter, and the flow rate control more precise, facilitating subsequent maintenance and expansion.

[0060] In some embodiments, such as Figure 10-12 As shown, the dewatering device 120 may include: a support 121, a material cylinder 122, a vacuum tank 123, and a vacuum pump 124.

[0061] A support frame 121 is disposed on the front side of the dilution device, and the support frame 121 includes at least an upper layer and a lower layer. The support frame 121 can be a hollow frame, and the material cylinder 122, vacuum tank 123, and vacuum pump 124 of the dewatering device 120 can be installed in the inner space of the support frame 121, which can make the installation of the material cylinder 122, vacuum tank 123, and vacuum pump 124 more stable, giving the dewatering device 120 better integration, and the support frame 121 can effectively limit the space occupied by the dewatering device 120 as a whole. The support frame 121 can be installed on the top of the buffer tank 132, so that the support frame 121 and the buffer tank 132 are fixedly set together, and the vertical projection of the support frame 121 is all within the range of the top surface of the buffer tank. Thus, while effectively reducing the space occupied by the dewatering device 120, it can also ensure better installation stability of the dewatering device 120. The support 121 may include multiple layers, including at least an upper layer and a lower layer. The lower layer of the support 121 may be used to accommodate the vacuum tank 123 and the vacuum pump 124, and the upper layer of the support 121 may be used to accommodate the material cylinder 122.

[0062] The material cylinder 122 is located on the upper layer of the support 121. The upper part of the material cylinder 122 is connected to the mixing tank 111, and the bottom is connected to the buffer tank 132. The material cylinder 122, which can be connected to the mixing tank 111, is used to receive the diluted slurry and can hold the slurry. The bottom of the material cylinder 122 can be connected to the buffer tank 132 via a vacuum tank 123. After the slurry is dehydrated in the material cylinder 122, the solid portion can be retained in the material cylinder 122, while the liquid portion can enter the vacuum tank 123. After sample preparation, the liquid portion can enter the buffer tank 132 from the vacuum tank 123 for filtration and purification, enabling recycling.

[0063] Vacuum tank 123 is located on the lower layer of support 121, below material cylinder 122, and connected to material cylinder 122. Vacuum tank 123, situated below material cylinder 122 and installed on the lower layer of support 121, allows for vacuuming of vacuum tank 123 by vacuum pump 124. This enables solid-liquid separation of the slurry in material cylinder 122 under the action of vacuum tank 123. The solid portion forms a cake sample, which can be used for subsequent ash content testing. The liquid portion flows from vacuum tank 123 into buffer tank 132 after sample preparation, achieving waste liquid recycling.

[0064] A vacuum pump 124, located on the lower layer of the support 121 and on one side of the vacuum tank 123, is used to evacuate the vacuum tank 123 to achieve solid-liquid separation of the slurry in the feed cylinder 122. The vacuum pump 124 can be located on one side of the vacuum tank 123, so that the vacuum pump 124 and the vacuum tank 123 are arranged side-by-side. The vacuum pump 124 is located on the lower layer of the support 121, within the space inside the lower layer of the support 121. One end of the vacuum pump 124 can be connected to the vacuum tank 123, and the other end can be connected to the buffer tank 132, so that wastewater entering the vacuum pump 124 can be transported to the buffer tank. A one-way valve can be installed on the pipeline connecting the vacuum pump 124 and the buffer tank 132, so that the wastewater pumped by the vacuum pump 124, that is, the liquid part separated during the mineral slurry sample preparation process, can enter the buffer tank 132, effectively preventing the wastewater backflow from affecting the working safety of the vacuum pump 124 and the accuracy of the next sample preparation, and effectively improving the safety and operational stability of the vacuum pump 124 during operation.

[0065] Specifically, the inlet of the dewatering device 120 can be a feed valve. When the dewatering device 120 is in the sample preparation stage, this valve is opened, and simultaneously, the front valve of the material cylinder 122 is opened. The slurry to be tested enters the material cylinder 122 through the feed valve, the check valve, and the front valve of the material cylinder 122. When the feeding time reaches the desired value, the dewatering device 120 sends a stop feeding signal to the dilution device and sequentially closes the front valve of the material cylinder 122 and the feed valve. A flow meter is installed on the feed pipeline to monitor the state of the slurry in the pipeline. After the front valve of the material cylinder 122 is closed, the front valve of the vacuum pump 124 is opened, and the vacuum pump 124 is started to evacuate the vacuum tank 123, realizing solid-liquid separation of the slurry in the material cylinder, thereby realizing the sample preparation operation. Since the vacuum tank 123 is equipped with a pressure gauge, the vacuum degree inside the vacuum tank 123 can be monitored in real time. During the operation of the dewatering device 120, the vacuum level inside the vacuum tank 123 can first rise and then fall. When the vacuum level drops to the desired level, the vacuum pump 124 and the valve at the front end of the vacuum pump 124 can be closed sequentially to complete the sample preparation process. At this time, the slurry to be tested in the material cylinder 122 can complete solid-liquid separation under the action of the vacuum tank 123, and the remaining solid is the cake sample, which can be detected by a detection device later. The liquid can flow into the vacuum tank 123, and a small amount of liquid will be sucked away by the vacuum pump 124. The vacuum pump 124 can discharge wastewater to the buffer tank 132, and the wastewater in the vacuum tank 123 will eventually flow to the buffer tank 132 through the pipeline to facilitate subsequent purification of the wastewater in the buffer tank 132 for recycling. In some embodiments, after the sample preparation stage is completed and the cake sample is discharged from the dewatering device 120, the dewatering device 120 can enter the cleaning stage to avoid residual slurry or sludge in the dewatering device 120. The material cylinder 122 of the dewatering device 120 can be connected to the water storage tank 131, and a valve for clean water to enter is provided on the material cylinder 122. Opening the valve allows clean water from the water storage tank 131 to flow into the material cylinder 122, thus cleaning the material cylinder 122. Subsequently, a vacuum pump 124 can be used to evacuate the vacuum tank 123, allowing the liquid in the material cylinder 122 to enter the vacuum tank 123, thus cleaning the vacuum tank 123. The wastewater generated after cleaning can be discharged from the vacuum tank 123 into the buffer tank 132 for recycling. After cleaning the material cylinder 122 and the vacuum tank 123 of the dewatering device 120, the dewatering device 120 can be prepared for the next round of sample preparation. The dewatering device 120 can send a feeding signal to the dilution device, enabling the dilution device to supply the diluted slurry to the dewatering device 120. The dewatering device 120 can determine when to proceed with the next round of sample preparation based on the status of the dilution device. Once the dewatering device 120 has completed cleaning and the dilution device has completed diluting the slurry, the slurry can be transported to the dewatering device 120 for the next round of sample preparation.When the dewatering device 120 has finished cleaning, but the dilution device is still processing the slurry, the dewatering device 120 can be kept in standby mode until the dilution device finishes diluting the slurry before sample preparation.

[0066] According to the slurry sample preparation device provided in this embodiment, by setting up a support 121, a material cylinder 122, a vacuum tank 123, and a vacuum pump 124, the dewatering device 120 can be made more compact in structural layout, with better integration, and can significantly improve the efficiency, stability, and accuracy of sample preparation, while also possessing good safety, maintainability, and space adaptability. The support 121, as the structural carrier of the dewatering device 120, adopts a multi-layered arrangement, nesting the material cylinder 122, vacuum tank 123, and vacuum pump 124 according to their functions, making the equipment structure more compact and more integrated, effectively reducing the overall space occupation, while improving the relative stability and operational stability between components, avoiding the impact of equipment vibration or loose installation on dewatering accuracy. The vacuum pump 124 and the vacuum tank 123 work together to create a stable negative pressure environment in the material cylinder 122, enabling the slurry to complete efficient solid-liquid separation under negative pressure. The retained cake sample has good dryness and integrity, providing an ideal sample for subsequent ash content detection, significantly improving sample preparation accuracy. After the cake sample preparation is completed, the system can control the flow of clean water from the water storage tank 131 into the material tank 122, and use vacuum suction to draw the cleaning water into the vacuum tank 123, and further discharge it into the buffer tank 132, thereby achieving automatic cleaning of the material tank 122 and the vacuum tank 123. This cleaning process can prevent slurry residue or cross-contamination, ensuring the accuracy and reliability of the next round of sample preparation. After completing the self-cleaning operation, the dewatering device 120 can send a feeding request signal to the dilution device to achieve process coordination between the two key devices. When the dilution device completes the slurry dilution, the system can immediately trigger the next round of sample preparation, reducing waiting time and improving overall work efficiency and device resource utilization. A one-way valve is installed between the vacuum pump 124 and the buffer tank 132 to effectively prevent waste liquid from flowing back to the vacuum pump 124 or the material tank 122, ensuring the safe operation of the vacuum pump 124; at the same time, the vacuum degree change is monitored in real time by a pressure gauge to avoid system risks caused by abnormal vacuum conditions, which helps to improve the stability and fault response capability of the dewatering process.

[0067] Based on the same inventive concept, this disclosure also provides a slurry ash analyzer, which may include: a slurry sample preparation device and a detection device as described in any of the foregoing embodiments.

[0068] The slurry preparation device receives slurry supplied by external equipment to the slurry ash analyzer. First, the slurry is added to a mixing tank 111, where water is added and the mixture is diluted to effectively reduce its concentration and ensure consistent cake thickness in subsequent sample preparation. Simultaneously, a flocculant can be added to the mixing tank 111 via a dosing device to flocculate fine high-ash particles in the slurry, preventing them from clogging the filter cloth and improving the stability and safety of the slurry preparation process. The dewatering device 120 receives the diluted slurry, separates the solid and liquid components, and prepares cake samples. The water purification device receives wastewater discharged from the dewatering device 120 and the dilution device, filters the wastewater to obtain clean water, and then sends the clean water to the dilution device or uses it for rinsing, achieving water recycling. This effectively saves resources, reduces the cost of the slurry ash analyzer, and has good environmental performance.

[0069] A detection device, located downstream of the dehydration unit 120, is used to receive and detect the cake sample after dehydration. The detection device can be an X-ray fluorescence detector. Since the cake sample may contain minerals or inorganic substances from coal combustion, these substances can emit fluorescence after being excited by X-ray irradiation. The detection device can determine the substances and their content in the cake sample by emitting X-rays towards it and simultaneously receiving and detecting the fluorescence of each ash component, thus achieving high-precision ash content detection.

[0070] The slurry ash analyzer provided in this embodiment not only achieves closed-loop automated processing of slurry samples from dilution, sample preparation, water purification to testing, but also effectively improves detection accuracy, system stability, and environmental friendliness, reduces operating costs, and has high field applicability. By setting up a mixing tank 111 to dilute the slurry with water, the concentration of the slurry is effectively controlled, ensuring that the cake thickness obtained from each dewatering is uniform and consistent, avoiding detection errors caused by thickness variations, thereby improving the repeatability and accuracy of ash content detection results. The dosing device can add flocculants during the dilution stage, causing fine high-ash particles in the slurry to agglomerate, reducing the problem of these particles clogging the filter cloth or affecting dewatering efficiency when entering the dewatering stage, significantly improving the operational stability and reliability of the dewatering device 120, and reducing maintenance frequency. The water purification device filters and purifies the wastewater generated during sample preparation; the resulting clean water can be resupplyed to the dilution device or used for cleaning the dewatering system, effectively saving water resources, reducing waste liquid discharge, and possessing strong environmental and economic advantages, contributing to the improvement of the equipment's sustainable operation capability. The detection device can perform qualitative and quantitative analysis of various elements in dehydrated cake samples without damaging the samples, achieving accurate detection of ash composition and content in coal or mineral samples with high sensitivity and precision. The slurry ash analyzer provided in this embodiment integrates dilution, dehydration, water purification, and detection functions into one unit, which is conducive to centralized control and maintenance management of the equipment. The whole machine has a compact structure, small footprint, and is easy to apply in coal mines, mineral processing plants, and other field applications, making it highly versatile.

[0071] Based on the same inventive concept, this disclosure also provides a method for detecting the ash content of slurry, applicable to a slurry ash analyzer as described in any of the foregoing embodiments, such as... Figure 14 As shown, it includes steps S210 to S280.

[0072] Step S210: Add the slurry to the mixing tank. When the ash analyzer is in sample preparation mode, the slurry can first be transferred from the outside to the mixing tank. The liquid level of the slurry in the mixing tank can be monitored in real time according to the level gauge installed on the top of the mixing tank. The amount of slurry to be added to the mixing tank can be determined based on the capacity of the mixing tank and the ash analyzer's requirements for slurry dilution.

[0073] Step S220: When the slurry level in the mixing tank reaches the first height threshold, clean water is added to the mixing tank from the water storage tank. When the slurry level in the mixing tank reaches the preset first height threshold, it can be considered that the current slurry volume has met the requirements, and the addition of slurry to the mixing tank can be stopped. Subsequently, clean water can be added to the mixing tank from the water storage tank to dilute the slurry. Clean water can be added quantitatively according to the sample preparation requirements of the slurry ash analyzer. Therefore, the liquid level change can be continuously monitored during the addition of clean water using the liquid level gauge installed on the top of the mixing tank. When the liquid level reaches the second height threshold, the addition of clean water can be stopped, indicating that the concentration of the currently added slurry and the slurry obtained after dilution by stirring meets the subsequent sample preparation requirements.

[0074] Step S230: Add flocculant to the mixing tank via a dosing device. Adding flocculant to the mixing tank via this device causes fine, high-ash particles to flocculate into clusters, thus separating the liquid slurry from the flocculated precipitates. This effectively improves the flocculation of fine, high-ash particles in the slurry and precipitates particulate matter that could subsequently affect the dewatering and cake-making process. After adding the flocculant to the mixing tank via the dosing device, the rotating agitator inside the tank ensures thorough mixing of the flocculant, slurry, and water, resulting in uniform dilution of the slurry and allowing the flocculated impurities to settle. Adding flocculant to the mixing tank reduces impurities in the diluted slurry, effectively minimizing its impact on the subsequent dewatering and cake-making process.

[0075] In step S240, the dilution device, in response to receiving a start-feed signal from the dewatering device, adds diluted slurry to the dewatering device. After the dilution device completes the dilution of the slurry, upon receiving a start-feed signal from the dewatering device, the dilution device can add diluted slurry to the feed tank of the dewatering device through its mixing tank. A level gauge can also be installed on the top of the feed tank. Since the dewatering device needs to dewater the slurry into a cake sample with uniform thickness, the level gauge can be used to determine the amount of slurry in the feed tank of the dewatering device, thereby ensuring a high consistency in the thickness of the cake sample obtained after dewatering.

[0076] In step S250, the dilution device, in response to receiving a stop-feed signal from the dewatering device, stops adding diluted slurry to the dewatering device. The slurry level in the dewatering device's feed tank can be determined by a level gauge, thereby determining the amount of slurry in the feed tank. When the amount of slurry in the feed tank reaches the sample preparation requirements of the dewatering device, a stop-feed signal can be sent to the dilution device. Upon receiving the stop-feed signal, the dilution device can stop adding diluted slurry to the dewatering device, allowing the slurry ash analyzer to enter the sample preparation stage.

[0077] Step S260: The diluted slurry is dewatered using a dewatering device to obtain a cake sample, and the wastewater is discharged to a water purification device. The diluted slurry can be dewatered using a dewatering device. Specifically, a vacuum pump can be used to extract air from the vacuum tank, allowing the slurry in the feed cylinder connected to the vacuum tank to achieve solid-liquid separation under the action of the vacuum tank, with the solid portion forming a cake sample. The cake sample produced by the slurry ash analyzer in this embodiment has a uniform thickness and a smooth surface, avoiding detection errors caused by uneven cake thickness and surface roughness, resulting in higher accuracy in subsequent ash content detection.

[0078] Step S270: The ash content of the slurry is determined by detecting the cake sample using a detection device. This device can be a radiographic testing equipment. Since the cake sample may contain minerals or inorganic substances from coal combustion, these substances emit fluorescence upon excitation by X-ray irradiation. The detection device can determine the ash content by emitting X-rays into the cake sample and simultaneously receiving and detecting the fluorescence of each ash component, thus achieving high accuracy in ash content detection.

[0079] Step S280: Wastewater is received and filtered through a water purification device. The wastewater can be the liquid portion remaining after solid-liquid separation of the slurry in the dewatering device. The wastewater is received and collected through the water purification device's filter, which removes sludge and yields clean water. This clean water can then be stored in a storage tank, and the water in the storage tank can be sent to a dilution device to dilute the slurry, thus achieving a clean water circulation system within the slurry ash analyzer.

[0080] According to the slurry ash content detection method provided in this disclosure, each slurry sample achieves high-quality preparation and high-precision detection, while considering equipment operational stability, detection accuracy, and environmental protection and energy saving. Real-time monitoring of the liquid level in the mixing tank and the dewatering device's feed cylinder using a level gauge automatically controls the amount of slurry and clean water added, ensuring accurate slurry dilution ratios and a highly stable sample preparation process, avoiding uneven dilution or inconsistent sample thickness caused by human error. The dilution step, through quantitative addition of clean water combined with flocculant, achieves uniform dilution of the slurry and effective flocculation of fine hydrophilic particles. This reduces the impact of fine hydrophilic particles clogging the dewatering device, ensuring uniform cake thickness and a smooth surface, thereby improving detection accuracy. The use of flocculant promotes the flocculation and sedimentation of fine hydrophilic particles in the slurry, reducing the risk of clogging in the dewatering device, ensuring continuous and stable operation of the dewatering device, reducing maintenance frequency, and improving system safety and reliability. The feeding signal response mechanism enables precise delivery and timely stopping of the diluted slurry to the dewatering unit's feed cylinder, effectively controlling the slurry volume and ensuring continuity in sample preparation and consistency in cake quality. Analysis of the dewatered cake samples using a detection device accurately determines the ash composition and content of the slurry, significantly improving the sensitivity and accuracy of ash detection. A water purification device filters and purifies the wastewater generated during dewatering, removing sludge and providing clean water which is then returned to the dilution stage, achieving water resource recycling, reducing water consumption and wastewater discharge, and enhancing the system's environmental performance and economic benefits.

[0081] In some embodiments, before adding the slurry to the mixing tank in step S210, the slurry ash content detection method further includes steps S211 and S212.

[0082] like Figure 15 As shown, in step S211, water is added to the mixing tank to clean it. Clean water can be added from a water storage tank to the mixing tank, and the mixing paddle can be rotated to clean the tank. Since some sludge may remain on the inner wall of the mixing tank, this sludge can affect the subsequent slurry dilution environment, leading to inconsistent cake thickness or uneven surfaces in the sample preparation stage. These issues can cause errors in the ash content detection of the slurry ash analyzer. Therefore, cleaning the mixing tank removes the sludge, preventing it from affecting subsequent slurry dilution, sample preparation, and detection.

[0083] Step S212: The wastewater from cleaning the mixing tank is discharged into a buffer tank. The wastewater after cleaning the mixing tank contains sludge; therefore, it can be discharged into the buffer tank and further treated by a water purification device to achieve water resource recycling.

[0084] In step S240, before the dilution device adds the diluted slurry to the dewatering device in response to receiving the start feeding signal from the dewatering device, the slurry ash content detection method further includes steps S241 and S242.

[0085] like Figure 16 As shown, in step S241, water is injected into the dewatering device to clean it. Since the dewatering device separates the slurry into solid and liquid components, resulting in a cake sample and wastewater, slurry residue may remain in the material tank and vacuum tank of the dewatering device. Therefore, the material tank can be cleaned by connecting it to a water storage tank, allowing clean water from the storage tank to flow into the material tank. Subsequently, a vacuum pump can be used to evacuate the vacuum tank, allowing the liquid in the material tank to enter the vacuum tank, thus cleaning the vacuum tank.

[0086] Step S242: Discharge the wastewater from cleaning the dewatering device into a buffer tank. After cleaning the material cylinder and vacuum tank of the dewatering device, the wastewater may contain slurry and sludge. Therefore, the wastewater can be discharged into the buffer tank and further treated by a water purification device to achieve recycling.

[0087] According to the slurry ash content detection method provided in this embodiment, by setting cleaning steps for the mixing tank and dewatering device before adding the slurry to the mixing tank and before adding the diluted slurry to the dewatering device, the stability and accuracy of slurry ash content detection are significantly improved. Through steps S211 and S212, the mixing tank is cleaned with clean water and wastewater is discharged, effectively removing residual sludge and flocculated impurities from the mixing tank. This avoids interference from these residues with the slurry dilution environment, ensuring the consistency and flatness of the cake sample thickness and surface during sample preparation, and reducing detection errors caused by these residues. Simultaneously, the wastewater is introduced into a buffer tank for centralized treatment, achieving water resource recycling and improving the environmental performance and economic benefits of the equipment. Through steps S241 and S242, the material cylinder and vacuum tank of the dewatering device are cleaned with water, and the cleaning wastewater is discharged into the buffer tank. This effectively removes residual slurry, sludge, and impurities, preventing residues from affecting the stable operation of subsequent sample preparation steps, ensuring sample quality and detection accuracy. Furthermore, centralized treatment and recycling of wastewater further reduces water consumption, operating costs, and environmental burden. This method, by incorporating equipment cleaning and wastewater recycling steps, significantly improves the cleanliness of the sample preparation environment and the continuous operational stability of the slurry ash analyzer, effectively avoiding detection errors caused by equipment residues, ensuring the accuracy and repeatability of slurry ash content detection, and simultaneously achieving efficient water resource recycling.

[0088] In some embodiments, such as Figure 17 As shown, the slurry ash content detection method also includes steps S291 and S292.

[0089] Step S291: In response to the filter's operating time reaching a first time threshold, water is injected into the filter from the storage tank to clean it. Since the filter is used to filter wastewater, which may contain flocculent precipitates and sludge, some sludge adheres to the filter's internal structure, such as the filter screen or filter cloth, or the filter's inner wall during the filtration process, causing blockage. Therefore, the filter needs to be cleaned periodically. When the filter's operating time reaches the first time threshold, water is injected into the filter from the storage tank to clean it. This flushes away the sludge adhering to the filter's inner wall and structure, thus cleaning the filter.

[0090] Step S292: Discharge the wastewater from the filter cleaning equipment. After cleaning the filter, the wastewater may contain sludge or other impurities. This wastewater can be discharged from the equipment. Furthermore, since the sludge and other impurities in the wastewater can be separated into solid and liquid phases through sedimentation, the wastewater can be discharged to a sedimentation tank outside the equipment. After sedimentation, the supernatant is returned to a buffer tank, and the wastewater is then collected and further treated by a water purification device for recycling.

[0091] The slurry ash content detection method provided in this embodiment can effectively prevent filter clogging, extend equipment life, and ensure clean water quality. In step S291, when the filter's operating time reaches a preset first time threshold, clean water is injected into the filter from the storage tank to rinse the filter screen, filter cloth, and inner wall inside the filter. This effectively removes attached sludge and other impurities, thus preventing clogging of the filter structure. In step S292, the wastewater generated from cleaning the filter is introduced into a buffer tank for further centralized treatment using a water purification device. This effectively removes residual sludge, suspended solids, and other contaminants from the wastewater, yielding clean water. This clean water can be reused for cleaning operations of the mixing tank, dewatering device, or filter, or for slurry dilution, achieving efficient recycling of water resources, reducing dependence on external water use, and providing excellent energy-saving and environmental protection effects.

[0092] This application uses specific terms to describe embodiments of the application. Terms such as "an embodiment," "one embodiment," and / or "some embodiments" refer to a particular feature, structure, or characteristic associated with at least one embodiment of the application. Therefore, it should be emphasized and noted that references to "an embodiment," "one embodiment," or "an alternative embodiment" in different locations throughout this specification do not necessarily refer to the same embodiment. Furthermore, certain features, structures, or characteristics in one or more embodiments of the application can be appropriately combined.

[0093] In the context of this application, unless the context clearly indicates otherwise, the words "a," "an," "an," and / or "the" do not specifically refer to the singular and may also include the plural. Generally speaking, the terms "comprising" and "including" only indicate the inclusion of explicitly identified steps and elements, which do not constitute an exclusive list, and the method or apparatus may also include other steps or elements.

[0094] Similarly, it should be noted that, in order to simplify the description of the present application and thus aid in the understanding of one or more embodiments, the foregoing description of the embodiments of the present application sometimes combines multiple features into a single embodiment, drawing, or description thereof. However, this disclosure method does not imply that the subject matter of the present application requires more features than those mentioned in the claims. In fact, the embodiments contain fewer features than all the features of the single embodiments disclosed above.

[0095] The basic concepts have been described above. Obviously, for those skilled in the art, the above disclosure is merely illustrative and does not constitute a limitation of this application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements, and corrections to this application. Such modifications, improvements, and corrections are suggested in this application, and therefore remain within the spirit and scope of the embodiments of this application.

Claims

1. A slurry sample preparation apparatus, comprising: Dilution apparatus, comprising: A mixing tank is provided with a slurry inlet at the top and a slurry outlet at the bottom. A dilution inlet for adding clean water into the mixing tank is provided on the upper circumference of the mixing tank. The mixing tank is used for stirring to dilute the slurry. A dosing device, connected to the mixing tank, is used to deliver flocculant to the mixing tank; A dewatering device is installed in front of the dilution device and connected to the mixing tank. It is used to receive the diluted slurry and dewater the slurry to make cake samples. A water purification device for receiving wastewater discharged from the dewatering device and purifying the wastewater to supply clean water to at least the dilution device, comprising: A water storage tank is located behind the dilution device. The water storage tank is at least connected to the stirring tank and is used to store purified water and supply water to the stirring tank. The buffer tank is in the shape of an inverted cone and is located below the dilution device and the dewatering device. The cross-section of the upper part of the buffer tank covers the projection of the dilution device and the dewatering device in the vertical direction. The buffer tank is used to store wastewater. A filter is installed on one side of the water storage tank, with one end connected to the buffer tank and the other end connected to the water storage tank. It is used to receive and filter the wastewater in the buffer tank and transport the filtered clean water to the water storage tank.

2. The slurry sample preparation apparatus according to claim 1, wherein, The dosing device also includes: A reagent tank, arranged side by side with the mixing tank, is used to store the flocculant; A metering pump is installed in the connection passage between the reagent tank and the mixing tank to control the amount of flocculant entering the mixing tank from the reagent tank.

3. The slurry sample preparation apparatus according to claim 1, wherein, The dilution device further includes: A mortar pump is located below the mixing tank and behind the dewatering device. The inlet end of the mortar pump is connected to the mixing tank, and the outlet end of the mortar pump is connected to the dewatering device.

4. The slurry sample preparation apparatus according to claim 3, wherein, The water purification device also includes: A water injection pump is located below the mortar pump, behind the dewatering device, and in front of the water storage tank. The inlet of the water injection pump is connected to the water storage tank. The first branch of the outlet of the water injection pump is connected to the mixing tank, the second branch of the outlet of the water injection pump is connected to the filter, and the third branch of the outlet of the water injection pump is connected to the water storage tank.

5. The slurry sample preparation apparatus according to claim 4, wherein, The water purification device also includes: A high-pressure water storage tank is located on one side of the water storage bucket and in front of the filter. The fourth branch of the outlet of the water injection pump is connected to the high-pressure water storage tank to maintain stable water pressure at the outlet of the water injection pump.

6. The slurry sample preparation apparatus according to claim 1, wherein, The water purification device also includes: A buffer pump is located below one side of the buffer tank, with its inlet end connected to the buffer tank and its outlet end connected to the filter.

7. The slurry sample preparation apparatus according to claim 1, wherein, The dehydration device includes: A support is disposed on the front side of the dilution device, and the support includes at least an upper layer and a lower layer; A material cylinder is located on the upper layer of the support. The upper part of the material cylinder is connected to the mixing tank, and the bottom is connected to the buffer tank. A vacuum tank is located on the lower layer of the support, below the material cylinder, and in communication with the material cylinder; A vacuum pump, located on the lower layer of the support and on one side of the vacuum tank, is used to evacuate the vacuum tank to separate the solid and liquid slurry in the feed cylinder.

8. A slurry ash analyzer, comprising: The slurry sample preparation apparatus according to any one of claims 1-7 is used to prepare slurry into cake samples; A detection device is located downstream of the dehydration device and is used to receive and detect the cake sample after dehydration.

9. A method for detecting ash content in mineral slurry, applied to the mineral slurry ash analyzer as described in claim 8, comprising: The slurry is added to the mixing tank; When the slurry level in the mixing tank reaches the first height threshold, clean water is added to the mixing tank from the water storage tank; Flocculant is added to the mixing tank through the dosing device; In response to receiving a start feeding signal from the dewatering device, the dilution device adds diluted slurry to the dewatering device. The dilution device stops adding diluted slurry to the dewatering device in response to receiving a stop feeding signal from the dewatering device. The diluted slurry is dewatered by the dewatering device to obtain a cake sample, and the wastewater is discharged to the water purification device. The ash content of the slurry is determined by detecting the cake sample using the aforementioned detection device. The wastewater is received and filtered by the water purification device.

10. The method for detecting ash content in slurry according to claim 9, wherein, Before adding the slurry to the mixing tank, the slurry ash content detection method further includes: Add water to the mixing tank to clean it; Wastewater from cleaning the mixing tank is discharged into the buffer tank; Before the dilution device adds the diluted slurry to the dewatering device in response to receiving a start-feed signal from the dewatering device, the slurry ash content detection method further includes: Water is injected into the dehydration device to clean it; Wastewater from cleaning the dehydration device is discharged into the buffer tank.

11. The method for detecting ash content in slurry according to claim 9, wherein, The method for detecting ash content in slurry also includes: In response to the filter's operating time reaching a first time threshold, water is injected into the filter from the water storage tank to clean the filter; Wastewater from cleaning the filter is discharged from the equipment.

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