A kind of ore pulp dilution flocculation equipment and sample preparation device

Abstract

This disclosure relates to the field of ash content detection technology, specifically to a slurry dilution and flocculation device and a sample preparation apparatus. The slurry dilution and flocculation device includes: a dilution tank with a slurry inlet for injecting slurry, a dilution water inlet for adding clean water to dilute the slurry, a reagent inlet for adding reagents, and a slurry outlet for discharging liquid; a reagent tank connected to the dilution tank, equipped with a liquid outlet connected to the reagent inlet for conveying reagents into the dilution tank; and a concentration meter located upstream of the slurry inlet for determining the concentration of the slurry entering the dilution tank from the slurry inlet. According to the slurry dilution and flocculation device provided by this disclosure, the slurry concentration can be effectively controlled, ensuring that the cake samples prepared from different slurries have a consistent thickness and smooth surface during subsequent sample preparation, effectively improving the accuracy of subsequent cake sample testing. Flocculation achieved by adding reagents from the reagent tank to the dilution tank facilitates solid-liquid separation and improves the stability of subsequent sample preparation.

Description

Technical Field

[0001] This disclosure relates to the field of ash content detection technology, specifically to a slurry dilution and flocculation device and a sample preparation apparatus. Background Technology

[0002] Ash content testing is a technique that uses X-ray fluorescence and other technologies to detect the composition and content of inorganic minerals in samples such as coal. Ash content in coal refers to the mineral residue remaining after coal is completely burned under specified conditions. Ash content testing of coal samples allows for a more accurate assessment of coal quality, providing significant guidance for subsequent coal mining and sorting processes. For ash content testing of flotation concentrate, the slurry is typically dewatered and prepared into cakes. The composition of the slurry is then analyzed through the cake sample testing process. However, because the concentration of the slurry is unknown and variable, the cake thickness produced by standardized dewatering and cake-making equipment varies depending on the batch and concentration of the slurry. Furthermore, during dehydration and cake preparation, excessively high slurry concentration can cause uneven cake surface, leading to significant detection errors and affecting the accuracy of ash content testing. Additionally, the presence of tiny hydrophilic particles in the slurry can cause these particles to remain on the filter cloth surface during sample preparation, forming a water-resistant layer that prevents solid-liquid separation and results in sample preparation failure. Utility Model Content

[0003] To overcome the problems existing in the related technologies, an exemplary embodiment of this disclosure provides a slurry dilution and flocculation device in a first aspect, comprising: a dilution tank having a slurry inlet, a dilution water inlet, and a reagent inlet at the top, and a slurry outlet at the bottom; the slurry inlet being used to inject slurry into the dilution tank; the dilution water inlet being used to add clean water into the dilution tank to dilute the slurry; the reagent inlet being used to add reagent into the dilution tank; and the slurry outlet being used to discharge liquid from the dilution tank; a reagent tank communicating with the dilution tank, the reagent tank having a liquid outlet communicating with the reagent inlet for conveying reagent into the dilution tank; and a concentration meter disposed upstream of the slurry inlet for determining the concentration of the slurry entering the dilution tank through the slurry inlet.

[0004] In some embodiments, the slurry dilution and flocculation equipment further includes an air inlet pipe, one end of which is connected to the dilution tank and the other end is connected to an external high-pressure air source, for filling the dilution tank with gas to empty the liquid inside the dilution tank.

[0005] In some embodiments, the slurry dilution flocculation device further includes an exhaust valve, installed on the top of the dilution tank, for discharging gas from the dilution tank.

[0006] In some embodiments, the slurry dilution and flocculation equipment further includes a pressure transmitter disposed at the top of the dilution tank for determining the pressure difference between the inside and outside of the dilution tank.

[0007] In some embodiments, the slurry dilution flocculation device further includes: a safety valve connected to the dilution tank, for opening to release gas in the dilution tank when the gas pressure in the dilution tank exceeds a preset value; and / or a pressure reducing valve connected to the dilution tank for adjusting the outlet pressure of the dilution tank.

[0008] In some embodiments, the slurry dilution and flocculation equipment further includes: a self-priming sewage pump, connected to the dilution tank, for opening to drain the liquid in the dilution tank.

[0009] In some embodiments, the slurry dilution flocculation equipment further includes: a slurry feed pipe connected to the slurry inlet for conveying slurry from the outside to the slurry inlet; and a water inlet pipe connected to the dilution water inlet for conveying clean water from the outside to the dilution water inlet; the slurry feed pipe and the water inlet pipe are interconnected, and a valve is provided in the connection passage between the slurry feed pipe and the water inlet pipe, the valve being opened in the cleaning state of the slurry dilution flocculation equipment to allow clean water to flow into the slurry feed pipe.

[0010] In some embodiments, the slurry dilution and flocculation equipment further includes: a level gauge installed on the top of the dilution tank for determining the liquid level in the dilution tank; and / or a metering pump disposed in the connection passage between the liquid outlet and the reagent inlet for controlling the dosage of reagent entering the dilution tank from the reagent tank.

[0011] In some embodiments, the slurry dilution and flocculation equipment further includes: a stirring paddle installed inside the dilution tank for rotating to stir the liquid inside the dilution tank; and a stirring pump installed outside the dilution tank and connected to the stirring paddle for driving the stirring paddle to rotate.

[0012] Secondly, this disclosure also provides a sample preparation apparatus, comprising: a slurry dilution and flocculation device as described in the first aspect; and a dewatering device connected to the slurry dilution and flocculation device for receiving the slurry discharged from the slurry dilution and flocculation device and dewatering the slurry to prepare a cake sample.

[0013] 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.

[0014] According to the slurry dilution and flocculation equipment provided in this disclosure, by adding reagents into the dilution tank through a reagent container, tiny hydrophilic particles in the dilution tank can flocculate into larger flocs. During subsequent slurry sample preparation, these flocs can settle above the filter cloth, creating hydrophobic channels between the flocs, achieving solid-liquid separation. This effectively avoids filter cloth clogging and sample preparation failure, improving the stability of subsequent sample preparation. Furthermore, this disclosure allows for determining the slurry concentration in the dilution tank using a concentration meter, thereby controlling the amount of water added to the tank. This effectively controls the slurry concentration, ensuring consistent cake thickness for different slurries during subsequent sample preparation, thus improving the accuracy of subsequent cake sample testing. Attached Figure Description

[0015] This disclosure can be better understood by describing exemplary embodiments of the present disclosure in conjunction with the accompanying drawings, in which:

[0016] Figure 1 This is a schematic diagram of a slurry dilution and flocculation device according to an exemplary embodiment disclosed in a book.

[0017] Figure 2 This is a schematic diagram of a slurry dilution and flocculation device according to another exemplary embodiment disclosed;

[0018] Figure 3 This is a schematic diagram of a slurry dilution and flocculation device according to another exemplary embodiment disclosed;

[0019] Figure 4 This is a structural block diagram of a sample preparation apparatus shown according to an exemplary embodiment disclosed in a publication;

[0020] Figure 5 This is a schematic diagram of a sample preparation apparatus structure shown according to an exemplary embodiment disclosed in a book. Detailed Implementation

[0021] The following describes specific embodiments of this disclosure. 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 of this disclosure, some design, manufacturing, or production modifications based on the technical content disclosed in this disclosure are merely conventional technical means and should not be construed as insufficient content of this disclosure.

[0022] 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 disclosure pertains. The terms “first,” “second,” and similar terms used in this utility model patent application description and claims 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.

[0023] To solve the above technical problems, such as Figure 1 As shown, an exemplary embodiment of this disclosure provides a slurry dilution and flocculation device, which may include: a dilution tank 110, a reagent tank 120, and a concentration meter 130.

[0024] The dilution tank 110 has a slurry inlet, a dilution water inlet, and a reagent inlet at the top, and a slurry outlet at the bottom. The slurry inlet is used to inject slurry into the dilution tank 110, the dilution water inlet is used to add clean water to the dilution tank 110 to dilute the slurry, the reagent inlet is used to add reagents to the dilution tank 110, and the slurry outlet is used to discharge the liquid in the dilution tank 110. The dilution tank 110 can be used to hold slurry. The slurry inlet at the top of the dilution tank 110 can be connected to an external feeding device, allowing the slurry to enter the dilution tank 110 through the slurry inlet. The upper part of the dilution tank 110 can also have a dilution water inlet, which can be connected to an external water source, allowing clean water to enter the dilution tank 110 through the dilution water inlet and mix with the slurry in the dilution tank 110, thereby diluting the slurry in the dilution tank 110. The dilution tank 110 can be equipped with a stirring paddle. The rotation of the stirring paddle can fully mix the slurry and water in the dilution tank 110, making the mixed slurry more uniform. This results in a more uniform cake sample being prepared subsequently, further improving the accuracy of ash content detection. Adding water to the dilution tank 110 through the dilution inlet can fully dilute the slurry, effectively reducing its concentration, so as to obtain cake samples with consistent thickness and a smooth, uniform surface during the subsequent cake preparation process.

[0025] Because the slurry may contain fine particles, including hydrophilic particles, which are small in size and highly hydrophilic, they can easily clog filter cloths and other structures used for dehydration and solid-liquid separation during subsequent sample preparation, leading to equipment malfunctions and affecting the safety of subsequent sample preparation processes. Furthermore, the fine particles in the slurry may also include hydrophobic particles, which are small in size and poorly hydrophilic, easily passing through the gaps in the filter cloth, causing particle loss and resulting in the loss of important components in the cake sample made from the slurry, affecting the accuracy of cake sample testing. Therefore, a flocculant can be added to the dilution tank 110 through the reagent inlet from the reagent tank 120. When the flocculant is added to the slurry, the fine particles in the slurry can be flocculated into larger flocs. Because the flocs are larger, the slurry containing flocs cannot flow out through the filter cloth or other filtration structures after entering the subsequent sample preparation equipment, and can be retained in the cake sample. Therefore, hydrophobic particles in the fine particles can be flocculated into larger flocs, preventing them from flowing out through the gaps in the filter cloth, thus effectively avoiding the loss of fine hydrophobic particles. This further prevents the loss of hydrophobic particles, ensuring the richness and integrity of the components in the slurry cake sample. After the fine particles are flocculated into flocs by the flocculant, the hydrophilic particles in the fine particles can be flocculated on the outer periphery of the flocs, encapsulating other particles. Due to the large size of the flocs, after settling above the filter cloth, the gaps between the flocs can form hydrophobic channels. During subsequent sample preparation, the liquid portion of the slurry can flow through these hydrophobic channels and out through the gaps in the filter cloth, achieving solid-liquid separation of the slurry. Thus, by adding flocculant from the reagent tank 120 into the dilution tank 110 through the reagent inlet, the fine particles in the slurry can be flocculated into larger flocs, effectively avoiding filter cloth clogging and sample preparation failure, and improving the stability and safety of subsequent sample preparation. The bottom of the dilution tank 110 can be equipped with a slurry outlet. After the dilution tank 110 has completed the dilution and flocculation of the slurry, the slurry outlet at the bottom can be opened to transport the slurry to the subsequent equipment for dewatering and cake making.

[0026] 120 medicine barrels, such as Figure 1 As shown, the reagent tank 120, connected to the dilution tank 110, is equipped with a liquid outlet that is connected to the reagent inlet, used to deliver the reagent into the dilution tank 110. The reagent tank 120 can be used to hold flocculant. The liquid outlet of the reagent tank 120 can be connected to the reagent inlet of the dilution tank 110, so that the flocculant in the reagent tank 120 can be discharged from the liquid outlet and flow into the dilution tank 110. After entering the dilution tank 110, the flocculant can flocculate the fine particles in the dilution tank 110 into clumps, 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.

[0027] Concentration meter 130, such as Figure 1As shown, a concentration meter 130 is installed upstream of the slurry inlet to determine the concentration of the slurry entering the dilution tank 110. The concentration meter 130 can also be installed upstream of the slurry inlet to detect the concentration of the slurry added from the outside. To ensure the accuracy of dilution and further improve the consistency of the cake sample thickness obtained during the sample preparation process, the slurry dilution and flocculation equipment can dilute the slurry to a preset concentration. This ensures a consistent concentration of the slurry discharged from the dilution tank 110, and that the water content and thickness of the cake sample subsequently made from the diluted slurry are stable, while also ensuring the smoothness of its surface. Therefore, the concentration of the slurry entering the dilution tank 110 from the slurry inlet can be determined by the concentration meter 130. Based on the slurry concentration entering the dilution tank 110 from the slurry inlet and the preset concentration, the specific amount of clean water to be added to the dilution tank 110 can be determined, achieving quantitative dilution of the slurry in the dilution tank 110. In addition, when diluting slurry, the slurry dilution and flocculation equipment can first add water to the dilution tank 110 and then add slurry, which can effectively prevent the slurry outlet at the bottom of the dilution tank 110 and its connected pipeline from becoming blocked when discharging slurry.

[0028] In addition, the slurry dilution and flocculation equipment also has a self-cleaning function, which can clean the dilution tank 110 after each dilution and flocculation of the slurry. Clean water for cleaning the dilution tank 110 can be added to the tank through the dilution inlet. After cleaning, the wastewater in the dilution tank 110 can be discharged through the slurry outlet. The slurry outlet can be connected to multiple pipelines, allowing it to connect to subsequent sample preparation equipment during operation, conveying the diluted and flocculated slurry to the sample preparation equipment. In the clean state, the slurry outlet can connect to a waste discharge tank, discharging the wastewater from the dilution tank 110 to the waste discharge tank for wastewater treatment.

[0029] According to the slurry dilution and flocculation equipment provided in this disclosure, by integrating a dilution tank 110, a reagent tank 120, and a concentration meter 130, quantitative dilution and efficient flocculation of slurry can be achieved, improving the stability, accuracy, and safety of the sample preparation process. The dilution tank 110 is equipped with multiple independent inlets for adding slurry, water, and reagents, and can be used with a stirring structure to ensure thorough mixing of the slurry and water, contributing to uniform dilution of the slurry. After dilution and flocculation, the slurry can be quickly discharged, improving efficiency. The reagent tank 120 is connected to the dilution tank 110, and flocculant is added to the dilution tank 110 through the outlet, which can significantly improve the aggregation characteristics of fine particles, causing them to form flocs with increased particle size. The dilution tank 110 flocculates tiny hydrophilic particles into larger flocs, allowing these flocs to settle above the filter cloth during subsequent slurry sample preparation. This creates hydrophobic channels between the flocs, facilitating solid-liquid separation and effectively preventing filter cloth clogging and sample preparation failure. This improves the stability of subsequent sample preparation, making the dewatering process more efficient and preventing filter cloth clogging or particle loss, thus enhancing the integrity of the cake sample composition and the reliability of detection. A concentration meter 130, located upstream of the slurry inlet, monitors the slurry concentration in real time, providing data support for dilution control and assisting in calculating the required volume of added water. This enables automated quantitative dilution, improving dilution accuracy and the uniformity and smoothness of the subsequent cake sample. The dilution tank 110 has a self-cleaning function, allowing it to be connected to the sample preparation equipment or waste discharge system under different operating conditions by switching pipelines. After each use, clean water can be introduced through the dilution inlet to rinse the tank, and wastewater can be discharged from the slurry outlet to the waste liquid pool, reducing residual pollution and improving the continuity of equipment operation and ease of maintenance. The slurry dilution and flocculation equipment in this embodiment combines concentration detection, quantitative dilution, particle flocculation, and self-cleaning functions. It has a high degree of system integration, stable operation, and is suitable for industrial scenarios with high automation requirements and strict sample preparation accuracy requirements. It can significantly improve the processing quality and sample preparation efficiency of slurry samples.

[0030] In some embodiments, such as Figures 1 to 3As shown, the slurry dilution and flocculation equipment may further include: an air inlet pipe 140, one end of which is connected to the dilution tank 110, and the other end is connected to an external high-pressure air source, used to introduce gas into the dilution tank 110 to empty the liquid inside the dilution tank 110. The dilution tank 110 can be in a sealed state during the dilution and flocculation process and the cleaning process. The dilution tank 110 may be equipped with a lid, which, through a sealing connection with the tank body, ensures that the dilution tank 110 remains sealed during the dilution and flocculation process and the cleaning process. Because the dilution tank 110 is in a sealed state during the dilution and flocculation process and the cleaning process, after the slurry dilution and flocculation are completed, high-pressure gas can be supplied to the dilution tank 110 through the air inlet pipe 140, thereby pressurizing the dilution tank 110. This allows the slurry outlet at the bottom of the dilution tank 110 and its connected discharge pipe to have a similar discharge pressure to the slurry inlet and its connected slurry conveying pipe, thus ensuring that the slurry can be conveyed outward from the slurry outlet. Furthermore, during the cleaning process of the dilution tank 110, since the dilution tank 110 remains sealed during cleaning, high-pressure gas can be supplied to the dilution tank 110 through the air inlet pipe 140 after cleaning is completed. This pressurizes the dilution tank 110, ensuring that the slurry outlet at the bottom of the dilution tank 110 and its connected discharge pipe have a similar discharge pressure to the slurry inlet and its connected slurry conveying pipe. This guarantees that the remaining wastewater after cleaning in the dilution tank 110 can be discharged out through the slurry outlet and ultimately discharged into the waste disposal pool. Specifically, the maximum pressure applied to the dilution tank 110 through the air inlet pipe 140 can be set to 0.2 MPa to ensure that the slurry or wastewater in the dilution tank 110 can be completely discharged out of the dilution tank 110 through the slurry outlet. When the air inlet pipe 140 pressurizes the dilution tank 110, causing the pressure inside the dilution tank 110 to reach 0.2 MPa, or to reach 0.2 MPa and remain there for a certain period of time, it can be determined that the slurry or wastewater inside the dilution tank 110 has been completely discharged, and the air inlet pipe 140 can be closed to stop the input of gas into the dilution tank 110.

[0031] According to the slurry dilution and flocculation equipment provided in this disclosure, by setting up an air inlet pipe 140, high-pressure gas can be injected into the dilution tank 110, achieving efficient emptying of the liquid in the dilution tank 110 and significantly improving the discharge and waste discharge efficiency. The dilution tank 110, through a sealed structure, ensures that it remains in a closed state during the dilution, flocculation, and cleaning processes. Based on this, the air inlet pipe 140 is set up, with one end connected to the dilution tank 110 and the other end connected to an external high-pressure gas source. After the dilution or cleaning process is completed, gas can be controlled to be introduced into the dilution tank 110 to pressurize the tank, allowing the internal liquid to be smoothly discharged from the slurry outlet at the bottom under pressure. This effectively overcomes the problem of incomplete discharge of residual liquid caused by insufficient liquid gravity, high viscosity, or long discharge pipes, ensuring that the slurry or wastewater can be fully discharged and improving the thoroughness of discharge. When the diluted slurry is transported to the sample preparation equipment, the dilution tank 110 is pressurized through the air inlet pipe 140. This ensures a sufficient pressure difference between the tank and the discharge end, preventing interruptions in transport, backflow in the pipeline, or slurry stagnation due to insufficient pressure difference. Simultaneously, in the cleaning state, residual wastewater in the dilution tank 110 can be forced out to the waste discharge tank in the same way, achieving a rapid and residue-free cleaning effect, improving equipment reusability, and reducing manual intervention. The air inlet pipe 140 enables the dilution tank 110 to have a pneumatically assisted drainage function, which not only achieves closed-loop control and efficient discharge of the dilution and cleaning processes but also enhances the automation level and working efficiency of the equipment, providing a reliable guarantee for continuous and stable slurry sample preparation.

[0032] In some embodiments, such as Figure 1 , Figure 3As shown, the slurry dilution and flocculation equipment may further include: an exhaust valve 150, installed on the top of the dilution tank 110, for discharging gas from inside the dilution tank 110. According to the aforementioned embodiment, after dilution and flocculation and cleaning are completed, high-pressure gas is supplied to the dilution tank 110 through the air inlet pipe 140, thereby pressurizing the dilution tank 110 and promoting the discharge of slurry or wastewater from the dilution tank 110. After the slurry or wastewater in the dilution tank 110 is discharged, high-pressure gas remains inside the dilution tank 110, making the gas pressure inside the dilution tank 110 higher than the gas pressure outside the dilution tank 110, thus making it difficult to supply slurry or clean water to the dilution tank 110 through the slurry inlet and dilution water inlet. Therefore, it is necessary to vent the high-pressure gas to allow clean water or slurry to be added back into the dilution tank 110 for the next cleaning or slurry dilution and flocculation. Therefore, after the slurry or wastewater in the dilution tank 110 is discharged and the air inlet pipe 140 is closed, the exhaust valve 150 can be opened to allow the high-pressure gas in the dilution tank 110 to be discharged outwards. An exhaust time can be preset; once the exhaust time is reached after opening the exhaust valve 150, it can be determined that the high-pressure gas in the dilution tank 110 has been discharged, ensuring that the air pressure inside and outside the dilution tank 110 is consistent. This allows the exhaust valve 150 to be closed, enabling the dilution tank 110 to undergo the next cleaning or slurry dilution and flocculation process. Alternatively, a pressure detection device can be installed inside the dilution tank 110 to detect air pressure. After opening the exhaust valve 150, the timing of closing the exhaust valve 150 can be determined based on the air pressure inside the dilution tank 110 as determined by the pressure detection device. The pressure detection device can detect only the air pressure inside the dilution tank 110, or it can detect both the air pressure inside and outside the dilution tank 110 separately. When the air pressure detection device detects that the air pressure inside the dilution tank 110 is at the preset value, or when the air pressure detection device detects that the air pressure inside and outside the dilution tank 110 is similar or the same, the exhaust valve 150 can be closed to complete the exhaust of the dilution tank 110.

[0033] According to the slurry dilution and flocculation equipment provided in this disclosure, by adding an exhaust valve 150 to the slurry dilution and flocculation equipment, the high-pressure gas remaining in the dilution tank 110 can be discharged in a timely manner after the pressurized drainage is completed, thereby improving the working efficiency of the slurry dilution and flocculation equipment. After the dilution tank 110 completes dilution and flocculation or cleaning, in order to fully discharge the liquid in the tank, the system will inject high-pressure gas into the dilution tank 110 through the air inlet pipe 140 to form a high-pressure environment to push the slurry or wastewater to the downstream equipment or waste discharge pool. However, after the drainage is completed, a high air pressure may still remain inside the dilution tank 110. If the gas is not vented in time, a pressure difference will form inside and outside the dilution tank 110, which will hinder the re-feeding of slurry inlet, dilution water inlet or reagent inlet, affecting the next round of sample preparation or cleaning operations. By installing an exhaust valve 150 at the top of the dilution tank 110, after draining and closing the air inlet pipe 140, the exhaust valve 150 can be opened to quickly expel the high-pressure gas inside the dilution tank 110, restoring the pressure balance inside and outside the tank. The exhaust valve 150 not only avoids backflow obstruction or feeding failure caused by residual pressure inside the tank, but also effectively shortens the switching time between different cycles of the dilution equipment, improving the overall operating efficiency and continuity of the equipment. The slurry dilution and flocculation equipment provided in this embodiment enables the dilution tank 110 to promptly expel internal residual pressure through the exhaust valve 150 after draining, ensuring that the dilution tank 110 can quickly enter the next round of dilution flocculation or cleaning process, further improving the working efficiency, intelligence level, and automated operation capability of the slurry dilution and flocculation equipment.

[0034] In some embodiments, such as Figure 1As shown, the slurry dilution and flocculation equipment may further include a pressure transmitter 160, installed at the top of the dilution tank 110, used to determine the pressure difference inside and outside the dilution tank 110. Since high-pressure gas remains inside the dilution tank 110 after the slurry or wastewater is discharged, it needs to be vented through the exhaust valve 150 until the pressure inside and outside the dilution tank 110 is equal. This ensures that slurry or clean water can be subsequently supplied to the dilution tank 110 from the slurry inlet and the dilution water inlet. Therefore, a pressure transmitter 160 can be installed at the top of the dilution tank 110 to detect the pressure inside the dilution tank 110, in order to determine when the venting through the exhaust valve 150 is complete. The pressure transmitter 160 can be a gauge pressure transmitter 160. The pressure port of the pressure transmitter 160 can be connected to the dilution tank 110, allowing the pressure transmitter 160 to monitor the air pressure inside the dilution tank 110 in real time. When the air pressure reaches a preset value or matches the air pressure outside the dilution tank 110, the exhaust valve 150 can be closed to complete the exhaust process. The pressure transmitter 160 can also be a differential pressure transmitter 160. The pressure port of the pressure transmitter 160 can be connected to the dilution tank 110, allowing the pressure transmitter 160 to monitor the air pressure inside the dilution tank 110 in real time. The differential pressure transmitter 160 can have two ports. One port can be connected to the inside of the dilution tank 110, and the other port can be connected to the outside of the pressure tank or to a reference pressure source. The value displayed by the pressure transmitter 160 is the pressure difference between the two connected ports. Specifically, the high-pressure end of the differential pressure transmitter 160 can be connected to the inside of the dilution tank 110, and the low-pressure end of the differential pressure transmitter 160 can be connected to the atmosphere outside the dilution tank 110. The value displayed by the pressure transmitter 160 is the pressure difference between the dilution tank 110 and the outside. When the pressure difference between the dilution tank 110 and the outside is less than or equal to a preset pressure difference value, or when the pressure difference between the dilution tank 110 and the outside is 0, the exhaust valve 150 can be closed to complete the exhaust process.

[0035] According to the slurry dilution and flocculation equipment provided in this disclosure, by installing a pressure transmitter 160 in the slurry dilution and flocculation equipment, the air pressure inside the dilution tank 110 or the air pressure difference between the inside and outside of the dilution tank 110 can be monitored in real time. This allows for precise control of the opening and closing timing of the exhaust valve 150 during the exhaust process, further enhancing the equipment's automation control capabilities and operational safety. By installing the pressure transmitter 160, the automation level and accuracy of the exhaust control of the dilution and flocculation equipment can be significantly improved, avoiding problems such as feeding difficulties, equipment damage, or downtime caused by incomplete exhaust. Simultaneously, it can reduce manual intervention, improve operational efficiency and safety, and ensure the continuous and stable operation of the slurry dilution and flocculation process.

[0036] In some embodiments, such as Figure 1 , Figure 3 As shown, the slurry dilution and flocculation equipment may also include: a safety valve 170 and / or a pressure reducing valve 180.

[0037] Safety valve 170, connected to dilution tank 110, is used to open and release gas from the dilution tank 110 when the gas pressure inside the dilution tank 110 exceeds a preset value. Since the slurry dilution and flocculation equipment can supply high-pressure gas to the dilution tank 110 through the air inlet pipe 140, thereby facilitating the discharge of slurry or wastewater from the dilution tank 110, the gas pressure inside the dilution tank 110 will increase. Since the dilution tank 110 is a closed structure, excessively high gas pressure can easily damage the dilution tank 110, affecting the safe operation of the slurry dilution and flocculation equipment. Therefore, safety valve 170 can be installed on the dilution tank 110 as a protective device. Safety valve 170 can automatically open when the gas pressure inside the dilution tank 110 exceeds its preset value, allowing the gas inside the dilution tank 110 to be released externally, thereby preventing excessively high gas pressure inside the dilution tank 110 and protecting the dilution tank 110. Specifically, the set pressure of safety valve 170 can be set to 0.25 MPa. When the gas pressure inside dilution tank 110 is greater than or equal to 0.25 MPa, it can be determined that the pressure inside dilution tank 110 is too high and may cause danger. Safety valve 170 can then automatically open, allowing the high-pressure gas inside dilution tank 110 to be discharged outwards. When the pressure inside dilution tank 110 is less than 0.25 MPa, safety valve 170 can automatically close.

[0038] A pressure reducing valve 180, connected to the dilution tank 110, is used to regulate the outlet pressure of the dilution tank 110 to maintain stable gas pressure inside the tank. Since the slurry dilution and flocculation equipment can continuously supply high-pressure gas to the dilution tank 110 through the inlet pipe 140, thereby facilitating the discharge of slurry or wastewater from the tank, the gas pressure inside the tank 110 will continuously change, and the outlet pressure of the gas output from the tank 110 will also change. Therefore, a pressure reducing valve 180 can be installed on the dilution tank 110. By adjusting the pressure reducing valve 180, the outlet pressure of the dilution tank 110 can be reduced. During the process of supplying high-pressure gas to the dilution tank 110 through the inlet pipe 140, the pressure at the outlet of the dilution tank 110 is kept stable through the real-time adjustment of the pressure reducing valve 180. Specifically, the pressure reducing valve 180 can be used to keep the outlet pressure of the dilution tank 110 stable during the process of supplying high-pressure gas to the dilution tank 110 through the inlet pipe 140. Furthermore, during this process, based on the monitoring of the gas pressure inside the dilution tank 110 by the pressure transmitter 160, the gas pressure inside the dilution tank 110 can be maintained at greater than or equal to 0.15 MPa and less than or equal to 0.2 MPa. When the pressure inside the dilution tank 110 is maintained within this range, the slurry or wastewater inside the dilution tank 110 can flow out, while ensuring that the dilution tank 110 has a high level of safety.

[0039] Furthermore, in some embodiments, to ensure the safety of the dilution tank 110, a pressure-resistant tank can be used as the dilution tank 110. The pressure resistance of the dilution tank 110 can be less than or equal to 0.8 MPa, so that when gas is supplied to the dilution tank 110 through the air inlet pipe 140, the dilution tank 110 can withstand higher pressure and has higher safety. At the same time, it can also effectively save the cost of the dilution tank 110.

[0040] According to the slurry dilution and flocculation equipment provided in this embodiment, by installing a safety valve 170 and a pressure reducing valve 180 in the slurry dilution and flocculation equipment, the air pressure inside the dilution tank 110 can be effectively controlled, protecting the dilution tank 110. This significantly improves the operational safety and air pressure control stability of the slurry dilution and flocculation equipment, avoiding equipment damage or operational abnormalities caused by excessive pressure or air pressure fluctuations. The safety valve 170, as an overpressure protection device for the dilution tank 110, automatically opens when the air pressure inside the dilution tank 110 exceeds its set pressure, venting the gas inside the dilution tank 110 and preventing safety accidents such as explosion or deformation due to overpressure. The safety valve 170 remains closed under normal air pressure conditions, automatically opens when the air pressure inside the dilution tank 110 exceeds its set pressure, and automatically closes when the pressure inside the dilution tank 110 returns to a safe range. It has a self-recovering characteristic and does not affect the normal operation of the dilution tank 110, thus ensuring the safety of the dilution tank 110 while also improving the reliability and safety of the slurry dilution and flocculation equipment. The pressure reducing valve 180 serves as a fine-tuning air pressure regulator, stabilizing the pressure between the high-pressure air source and the dilution tank 110. When high-pressure gas is supplied to the dilution tank 110 through the inlet pipe 140, the pressure reducing valve 180 adjusts the gas pressure inside the dilution tank 110, ensuring that the gas pressure entering the dilution tank 110 remains stable within a safe operating range. This not only ensures that the dilution tank 110 efficiently completes the task of discharging slurry or wastewater, but also effectively avoids problems such as poor discharge and equipment damage caused by excessive air pressure fluctuations, improving the overall control accuracy and operational stability of the slurry dilution and flocculation equipment. By incorporating the safety valve 170, the pressure reducing valve 180, and the pressure-resistant design of the dilution tank 110, the slurry dilution and flocculation equipment disclosed herein possesses better air pressure protection, stable regulation capabilities, and higher operational safety, providing reliable guarantees for slurry dilution, flocculation, discharge, and cleaning operations, thereby improving the overall operating efficiency, operational safety, and service life of the slurry dilution and flocculation equipment.

[0041] In some embodiments, such as Figure 2As shown, the slurry dilution and flocculation equipment may further include a self-priming sewage pump 190, connected to the dilution tank 110, used to open and empty the liquid inside the dilution tank 110. After cleaning and slurry dilution are completed, the slurry or wastewater inside the dilution tank 110 can also be directly pumped out by the self-priming sewage pump 190, thereby achieving faster and more convenient transportation of the diluted and flocculated slurry, effectively improving the transportation efficiency of slurry and wastewater. In the case where the liquid inside the dilution tank 110 is emptied by a self-priming sewage pump, the dilution tank 110 can be a non-sealed atmospheric pressure tank, and a vent hole can be provided on the lid of the dilution tank 110 to facilitate the self-priming sewage pump 190 to extract the slurry from the dilution tank 110. Meanwhile, by setting up a self-priming sewage pump 190, the piping of the slurry dilution flocculation equipment can be simplified, the number of components required for the installation of the slurry dilution flocculation equipment can be reduced, effectively saving costs and space. It can also make the installation and disassembly of the slurry dilution flocculation equipment simpler, thereby saving time for the installation, disassembly and maintenance of the slurry dilution flocculation equipment and improving efficiency.

[0042] In some embodiments, such as Figures 1 to 3 As shown, the slurry dilution and flocculation equipment may also include: a slurry feed pipe 200 and a water inlet pipe 210.

[0043] The slurry inlet pipe 200 is connected to the slurry inlet and is used to transport slurry from the outside to the slurry inlet. One end of the slurry inlet pipe 200 can be connected to the slurry source, and the other end can be connected to the slurry inlet of the dilution tank 110, so that slurry can be transported from the external slurry source to the slurry inlet when the slurry dilution and flocculation equipment is in operation.

[0044] The water inlet pipe 210 is connected to the dilution water inlet and is used to deliver clean water from the outside to the dilution water inlet. One end of the water inlet pipe 210 can be connected to a water source, and the other end can be connected to the dilution water inlet of the dilution tank 110, so that clean water can be delivered from an external water source to the slurry inlet when the slurry dilution flocculation equipment is in working or cleaning state.

[0045] The slurry inlet pipe 200 and the water inlet pipe 210 are interconnected, and a valve 220 is installed in the connection passage between the slurry inlet pipe 200 and the water inlet pipe 210. The valve 220 is used to open when the slurry dilution and flocculation equipment is in the cleaning state, so as to allow clean water to flow into the slurry inlet pipe 200. The slurry inlet pipe 200 and the water inlet pipe 210 can be connected to the slurry inlet and the dilution water inlet of the dilution tank 110, respectively. The slurry inlet pipe 200 can be interconnected with the water pipe, and a valve 220 is installed in the connection passage. When the slurry dilution and flocculation equipment is in the working state, the valve 220 is closed, the slurry is transported to the dilution tank 110 through the slurry inlet pipe 200, and clean water is introduced into the dilution tank 110 through the water inlet pipe 210, thereby achieving the dilution of the slurry. When the slurry dilution and flocculation equipment is in the cleaning state, valve 220 is opened, and clean water is supplied through inlet pipe 210. Some of the clean water can be directly supplied to the dilution tank 110 through inlet pipe 210 to facilitate cleaning of the dilution tank 110. In addition, some clean water can enter the slurry inlet pipe 200 through the connection between inlet pipe 210 and slurry inlet pipe 200, thereby flushing the slurry inlet pipe 200 and allowing this clean water to enter the dilution tank 110 through the slurry inlet pipe 200. The interconnection between slurry inlet pipe 200 and inlet pipe 210, with valve 220 installed on the connection, allows for flushing of the slurry inlet pipe 200 during the cleaning state, preventing slurry residue from remaining on the inner wall of the slurry inlet pipe 200 and causing blockage, which would affect subsequent slurry input and improve equipment safety. In addition, it can also prevent some slurry residue from remaining on the inner wall of the slurry inlet pipe 200, which would cause the subsequently input slurry to mix with the slurry residue on the inner wall of the slurry inlet pipe 200, thus affecting the accuracy of subsequent slurry sample preparation and ash content testing.

[0046] According to the slurry dilution and flocculation equipment provided in this embodiment, by setting a slurry inlet pipe 200 and a water inlet pipe 210 in the slurry dilution and flocculation equipment, and setting a controllable valve 220 between the two connecting passages, the slurry conveying path and cleaning process can be further optimized, effectively improving the operational safety of the equipment and the thoroughness of the dilution process. The slurry inlet pipe 200 can be used to stably input slurry from an external slurry source into the dilution tank 110 when the equipment is in working condition, while the water inlet pipe 210 can be used to supply water from an external water source to the dilution tank 110 to achieve slurry dilution. At the same time, the connecting passage between the slurry inlet pipe 200 and the water inlet pipe 210 and the valve 220 thereon are opened after the equipment enters the cleaning state, so that clean water can flow back from the water inlet pipe 210 into the slurry inlet pipe 200, thereby flushing the inner wall of the slurry inlet pipe 200. In cleaning mode, valve 220 is open, allowing clean water to clean the inner cavity of the dilution tank 110 and simultaneously flush the slurry inlet pipe 200. This thoroughly removes residual slurry particles from the inner wall of the pipe, preventing them from accumulating, drying, causing blockages, generating contaminants, or interfering with subsequent slurry concentration, thus improving the continuity and reliability of equipment operation. This structure effectively prevents residual slurry on the side wall of the slurry inlet pipe 200 from contaminating subsequent samples, improving the accuracy and repeatability of subsequent ash content detection or other component analysis results. Especially when alternating dilutions and sample preparation of different types of slurries, this self-cleaning function reduces cross-interference between different batches of slurry, ensuring better representativeness and scientific validity of experimental results and minimizing errors.

[0047] In some embodiments, such as Figure 1 As shown, the slurry dilution and flocculation equipment may also include: a level gauge 230 and / or a metering pump 240.

[0048] A level gauge 230 is installed on the top of the dilution tank 110 to determine the liquid level inside the tank. The level gauge 230 can be installed on the top of the dilution tank 110 to accurately measure the liquid level of the slurry or water inside the tank. This allows for the precise addition of slurry or water according to the required dilution concentration during the process of adding slurry or water into the tank 110 from the slurry inlet, thereby effectively controlling the concentration of the diluted slurry.

[0049] A metering pump 240, located at the connection between the liquid outlet and the reagent inlet, is used to control the dosage of the flocculant entering the dilution tank 110 from the reagent tank 120. The metering pump 240, located at the connection between the reagent tank 120 and the dilution tank 110 (i.e., at the connection between the liquid outlet and the reagent inlet), controls the amount of flocculant entering the dilution tank 110 from the reagent tank 120. The metering pump 240 can simultaneously control the amount of flocculant entering the dilution tank 110 from the reagent tank 120 and rapidly pump the flocculant from the reagent tank 120 into the dilution tank 110. This allows the flocculant to have a high flow rate in the connection channel between the reagent tank 120 and the dilution tank 110, thereby enabling the flocculant to quickly enter the dilution tank 110 and be flushed into the slurry, achieving thorough mixing with the slurry. This allows the fine hydrophilic particles in the slurry to flocculate more quickly, thereby 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 dilution and flocculation equipment provided in this embodiment, by installing a level gauge 230 and a metering pump 240 in the equipment, the equipment can further achieve precise control over the slurry concentration and flocculant dosage, thereby significantly improving the intelligence, accuracy, and operational stability of the slurry dilution and flocculation process. The level gauge 230 can be installed on the top of the dilution tank 110 or on the side wall of the dilution tank 110 to detect and provide real-time feedback on the liquid level in the dilution tank 110. Based on the liquid level data measured by the level gauge 230, combined with the original slurry concentration determined by the concentration meter 130, the volume of added water or slurry can be dynamically calculated and controlled to accurately adjust to the required concentration, ensuring the consistency and stability of the diluted slurry and improving the accuracy and repeatability of the dilution process. The metering pump 240 is used to precisely control the flocculant dosage delivered from the reagent tank 120 to the dilution tank 110. Through quantitative injection, it ensures that an appropriate proportion of flocculant is added to each batch of slurry, thereby achieving the optimal flocculation effect. The metering pump 240 not only accurately controls the flow rate but also provides a higher delivery speed, enabling the flocculant to be quickly flushed into the dilution tank 110 and rapidly mixed with the slurry. This ensures that the flocculant reaches a uniform distribution state in the shortest possible time, effectively shortens the flocculation reaction time, improves the overall processing efficiency, and significantly enhances the equipment's processing capacity.

[0051] In some embodiments, the slurry dilution and flocculation equipment may further include: a stirring pump 250 and a stirring paddle 270. The stirring paddle 270 is installed inside the dilution tank 110 and is used to rotate to stir the liquid inside the dilution tank 110; the stirring pump 250 is installed outside the dilution tank 110 and connected to the stirring paddle 270 to drive the stirring paddle 270 to rotate.

[0052] A stirring paddle 270 is installed inside the dilution tank 110. The stirring pump 250 drives the stirring paddle 270 to rotate, thereby agitating the slurry and diluting it within the tank. To ensure uniform mixing of the slurry and water, the stirring pump 250 can be connected to the stirring paddle 270, which is installed inside the tank 110. The operation of the stirring pump 250 causes the stirring paddle 270 to rotate, thus agitating the liquid inside the tank 110. During operation, after water and feed are complete, the stirring pump 250 can be turned on to drive the stirring paddle 270 to rotate, agitating the slurry continuously and uniformly. This ensures thorough mixing of the slurry with water and flocculant. Furthermore, the rotation of the stirring paddle 270 by the stirring pump 250 accelerates particle flocculation and sedimentation, resulting in a more uniform mixed slurry. This leads to a more uniform cake sample and further improves the accuracy of ash content detection. In the cleaning state, when clean water enters the dilution tank 110, the stirring pump 250 can be turned on to drive the stirring paddle 270 to rotate and stir the clean water, so that the clean water can more thoroughly clean the inner wall of the dilution tank 110, optimizing the cleaning efficiency and effect.

[0053] According to the slurry dilution and flocculation equipment provided in this embodiment, by setting up a stirring pump 250 and a stirring pump 270, when the equipment is in operation, the stirring pump 250 drives the stirring paddle 270 to continuously rotate and stir, which can fully mix the slurry with water and flocculant, achieving rapid dilution and full flocculation of particles. This effectively promotes the formation of flocs from fine particles and their uniform distribution throughout the slurry system, thereby ensuring the consistency and flatness of the obtained slurry cake sample, thus improving the accuracy of subsequent ash content detection. Simultaneously, by setting the stirring pump 250 to drive the stirring paddle 270 to stir the slurry, the flocculation efficiency can also be improved, and the stirring of the stirring paddle 270 ensures that the flocculated solids are evenly distributed in the slurry, more efficiently mixing the flocculated solids with the slurry. Furthermore, when the equipment is in cleaning mode, the stirring paddle 270 can be used to stir water, expanding the cleaning coverage area, thereby more thoroughly rinsing the tank wall and internal structural surfaces, improving the cleaning effect, reducing the risk of residual contaminants, and helping to ensure the stable operation and dilution accuracy of the equipment in the next dilution and flocculation operation. Therefore, by setting up the stirring pump 250 and the stirring paddle 270, the dilution uniformity, flocculation effect and cleaning efficiency of the slurry dilution and flocculation equipment can be significantly improved, thereby enhancing the overall operational reliability and sample preparation quality.

[0054] Specifically, when using the slurry dilution and flocculation equipment provided in this disclosure, the slurry can be diluted with water to a preset concentration value before adding flocculant to the diluted slurry. To ensure the representativeness of the tested slurry samples, after each slurry dilution and sampling test, the dilution tank 110 and the entire pipeline of the slurry dilution and flocculation equipment need to be emptied and cleaned to avoid contamination for the next sampling test.

[0055] In some embodiments, a dilution tank 110 with an appropriate volume can be selected according to the needs of slurry sample preparation, based on the required volume L of slurry after dilution and flocculation for sample preparation. x Determine the appropriate volume (L) of dilution tank 110. T The volume L of the dilution tank 110 T It can satisfy: L x / L T The concentration should be ≤0.8 to ensure sufficient space within the dilution tank 110. The inner diameter D of the selected dilution tank 110 can then be determined based on its volume. The concentration of the slurry fed into the slurry inlet can be detected using a concentration meter 130, and the concentration C is determined accordingly. R and the pre-set concentration C of the diluted slurry. C And the volume of slurry L required for sample preparation after dilution. x Calculate the feed volume L of dilution tank 110. L and inlet water volume L S According to L L L S D can calculate the corresponding inlet water level height H of the dilution tank 110. S And the feed liquid level height H of the slurry L An ultrasonic level gauge 230 with an appropriate range is installed on the top of the dilution tank 110 to monitor the inlet water level height H. S and the feed liquid level height H of the slurry L Monitoring allows for the control of water inflow and slurry dosage based on monitoring values.

[0056] Specifically, the slurry dilution and flocculation equipment provided in this disclosure can be used for ash content detection in refined coal slurry. The concentration of refined coal slurry is generally 300-500 g / L, which is relatively high. When directly sampling and vacuum filtering the refined coal slurry, the thickness of the resulting cake will vary due to the different slurry concentrations. Furthermore, the high slurry concentration leads to a longer solid-liquid separation time during sample preparation, and the surface of the cake after solid-liquid separation tends to be fluid, resulting in an uneven surface. In some cases, the high slurry concentration may prevent solid-liquid separation during sample preparation, resulting in a cake with excessively high water content, making accurate detection impossible and leading to significant errors in the test results. The slurry dilution and flocculation equipment provided in this disclosure can be preset to a concentration of 60 g / L after slurry dilution, so that the slurry can be diluted to 60 g / L in the slurry dilution and flocculation equipment provided in this disclosure, thereby reducing its concentration and facilitating sample preparation. The resulting cake sample has relatively stable moisture content and thickness, and the upper surface of the cake sample is flat, which meets the requirements of ash content detection. It can effectively improve the stability of subsequent sample preparation and the consistency of cake samples, thereby further improving the accuracy of ash content detection.

[0057] Specifically, this disclosure can also be used for ash content detection in raw coal slurry at coal washing plants. The concentration of raw coal slurry is generally 80-120 g / L. Due to the high content of fine particles such as mud and coal dust in raw coal slurry, direct sampling and vacuum filtration can lead to solid-liquid separation failure because fine particles settle onto the filter cloth, forming a water-resistant layer. The slurry dilution and flocculation equipment provided in this disclosure allows for a preset concentration of 60 g / L after dilution. The slurry is then diluted to 60 g / L in the equipment. Flocculant is added to the diluted slurry, causing the fine particles to flocculate into larger flocs. These flocs settle onto the filter cloth, and the gaps between the flocs form hydrophobic channels, enabling solid-liquid separation. This ensures successful sample preparation, resulting in cake samples with relatively stable moisture content and thickness. Tests showed that after the raw coal slurry was diluted and flocculated, the sample cake prepared by vacuum filtration had stable moisture content and thickness, and a relatively flat upper surface, which met the requirements for ash content testing. This effectively improved the stability of subsequent sample preparation and the consistency of the cake, thereby further improving the accuracy of ash content testing.

[0058] like Figure 3The diagram shows the structure of a slurry dilution and flocculation equipment. In the diagram, a1 and a2 are electric ball valves, and b1, b2, b3, and b4 are pneumatic angle seat valves. c1 and c2 are pneumatic three-way ball valves. Pneumatic three-way ball valve c1 has its A end connected to the slurry inlet, its B end connected to an external slurry source, and its C end connected to the flotation cell. Pneumatic three-way ball valve c2 has its A end connected to the flotation cell or waste discharge tank, its B end connected to the slurry outlet, and its C end connected to a dewatering device for dewatering the slurry, separating the solids and liquids, and forming a cake sample. The C end can also be connected to a fluorescence detection device, which may include a dewatering device and a detection device. After the slurry is formed into a cake sample by the dewatering device, the detection device performs fluorescence ash content detection on the cake sample, thereby achieving ash content detection of the slurry. d1-d6 are check valves. Valve island 260 in the diagram is used to control the opening and closing of the above valves. Specifically, the working process of the slurry dilution and flocculation equipment is as follows:

[0059] First, the slurry feed pipe 200, which supplies slurry to the dilution tank 110, is pre-emptively emptied. The electric ball valve a1 is opened, allowing the slurry to flow into the flotation cell or other designated discharge point via the BC passage of the pneumatic three-way ball valve c1. The concentration meter 130 measures the slurry concentration C in the pipeline. R Calculate the feed liquid level height H L and the inlet water level height H S Then, water can be added to the dilution tank 110 first. Open the pneumatic angle seat valve b2 and pneumatic angle seat valve b3, and add water to the dilution tank 110 through the dilution inlet until the water level reaches the inlet liquid level height H. S Close the pneumatic angle seat valve b2. The pre-emptive time can be set to N1 seconds. After N1 seconds, slurry can be added to the dilution tank 110. Simultaneously, ensure that the slurry is added to the dilution tank 110 only after the water injection operation is completed. Open the BA passage with the pneumatic three-way ball valve c1. Determine the liquid level in the dilution tank 110. When the liquid level reaches the water level height H... S Open the pneumatic angle seat valve b1 and inject material into the dilution tank 110 until the liquid level reaches the feed level height H. LClose the pneumatic angle seat valve b1. Open the BC passage with the pneumatic three-way ball valve c1 and close the electric ball valve a1. Then, the dilution tank 110 can be stirred by turning on the pneumatic stirring pump 250 and setting the stirring time N2. If flocculant needs to be added, it can be pumped into the dilution tank 110 through the metering pump 240. After N2 hours, it can be confirmed that the dilution tank 110 has completed the dilution and stirring of the slurry, and the diluted slurry can be transported to the subsequent dewatering unit. Close the pneumatic angle seat valve b3, and allow air to enter through the air inlet of the pressure reducing valve 180 to fill the dilution tank 110. The pressure transmitter 160 monitors the pressure inside the tank, and stops air intake when the pressure reaches 0.2 MPa. Open the pneumatic angle seat valve b4 to begin discharging the slurry from the slurry outlet and supplying it to the subsequent dewatering unit. The feeding time N3 can be set, and the pneumatic angle seat valve b4 is closed after N3 hours. After feeding is complete, the dilution tank 110 needs to be emptied and cleaned. Pneumatic three-way ball valve C2 opens the BA passage, pneumatic angle seat valve B4 opens, and pressure reducing valve 180 intermittently supplies air to maintain the pressure inside dilution tank 110 between 0.15MPa and 0.2MPa. The purging time is set to N4. After N4, the air inlet is closed, and pneumatic angle seat valve B4 is closed. Pneumatic three-way ball valve C2 opens the BC passage. Electric ball valve A2 (valve 220) opens. The pre-flushing pipeline time is set to N5. After N5, pneumatic angle seat valve B3 can be opened, followed by pneumatic angle seat valve B1. Pneumatic three-way ball valve C1 opens the BA passage, and ultrasonic level gauge 230 monitors the cleaning water level H inside the tank. C When the water level reaches H C Close the pneumatic angle seat valve b1, open the BC passage with the pneumatic three-way ball valve c1, and repeat the stirring (no flocculant added process, stirring time set to N6), pressurization, and venting process.

[0060] Based on the same inventive concept, this disclosure also provides a sample preparation apparatus, which may include: a slurry dilution and flocculation device as described in any of the foregoing embodiments, and a dewatering device 310.

[0061] The slurry dilution and flocculation equipment allows for the injection of slurry and clean water into a dilution tank through a slurry inlet and a dilution water inlet, respectively. The water addition is controlled based on the initial slurry concentration and target concentration measured by a concentration meter, achieving quantitative dilution. A stirring device is installed inside the dilution tank to ensure thorough mixing of the slurry and clean water, forming a slurry of uniform concentration. Subsequently, flocculant is added to the dilution tank through a reagent tank, causing fine particles in the slurry to flocculate into large flocs, improving dewatering performance and enhancing cake quality. After dilution and flocculation are complete, the slurry is conveyed to the subsequent dewatering unit 310 through the slurry outlet. After the diluted slurry is discharged, clean water is added through the dilution water inlet to perform self-cleaning of the dilution tank. The cleaning wastewater is discharged through the slurry outlet to a waste discharge tank, completing the slurry treatment process.

[0062] The dewatering device 310, connected to the slurry dilution and flocculation equipment, receives the slurry discharged from the equipment and dewaters it to prepare cake samples. The dewatering device 310 may have an inlet connected to the slurry dilution and flocculation equipment, allowing the slurry, after dilution and flocculation by chemicals, to enter the dewatering device 310 from the dilution tank through the inlet. The dewatering device 310 dewaters the liquid slurry and presses it into solid cake samples for subsequent identification and testing. The dewatering device 310 enables solid-liquid separation of the slurry; after dewatering and sample preparation, the solid cake sample can be transported to a testing device for ash content analysis. The dewatering device 310 can form a smooth cake sample from the slurry. Because the slurry is diluted and flocculated by the slurry dilution and flocculation equipment, and fine hydrophilic particles are flocculated, the cake sample produced by the dewatering device 310 has a consistent thickness and is relatively uniform, thus improving the accuracy of subsequent cake sample testing. It also achieves flocculation of fine hydrophobic particles, preventing their outflow and ensuring the accuracy of subsequent cake sample testing.

[0063] According to the sample preparation device provided in this embodiment, through the coordinated operation of the slurry dilution and flocculation equipment and the dewatering device 310, not only can precise dilution be achieved based on the original slurry concentration, improving flocculation efficiency and agglomeration effect, but the flocculated slurry can also be directly introduced into the dewatering device 310 for solid-liquid separation and preparation into cake samples, thereby simplifying the operation process and improving sample preparation efficiency. Utilizing the pressure filtration function of the dewatering device 310, the cake sample surface is made smooth and of uniform thickness, while retaining important particulate components in the slurry, improving sample consistency and representativeness, and ensuring the accuracy and reliability of subsequent ash content detection. Furthermore, the sample preparation device also has a cleaning and waste discharge function, which can automatically flush the inside of the dilution tank and pipelines, preventing residue from clogging or contaminating the next batch of slurry, enhancing the continuity and safety of system operation. Overall, this sample preparation device can significantly improve the intelligence and detection accuracy of the slurry processing process, and is suitable for the actual needs of automated sample preparation and analysis.

[0064] In addition, such as Figure 4 , Figure 5As shown, in some embodiments, a water purification device 320 can be connected to a sample preparation device, thereby forming an ash content detection sample preparation system. The water purification device 320 can receive and purify the wastewater discharged from the dewatering device 310, supplying clean water to the slurry dilution and flocculation equipment. The water purification device 320 can be connected to the dewatering device 310, allowing the dewatering device 310 to transport the liquid portion, i.e., wastewater, to the water purification device 320 after dewatering the slurry. The water purification device 320 receives and filters the wastewater, ultimately purifying it into clean water. This clean water can then re-enter the slurry dilution and flocculation equipment, enabling the water within the ash content detection sample preparation system to be recycled, effectively reducing water waste and making it more environmentally friendly. For the ash content testing sample preparation system, slurry can be added to the slurry dilution and flocculation equipment from an external slurry source. Clean water is added to the dilution tank 110 of the slurry dilution and flocculation equipment via the water purification device 320 to dilute the slurry. Flocculant is added to the dilution tank via the reagent tank 120 to flocculate the small particles in the slurry. The dilution tank 110 can transport the diluted and flocculated slurry to the dewatering device 310, where solid-liquid separation is performed to form a cake sample. The cake sample can be transported to the testing device for ash content testing. The liquid portion, containing impurities, is wastewater that flows into the water purification device 320 for filtration and recycling.

[0065] 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.

[0066] 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.

[0067] 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.

[0068] 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 dilution flocculation apparatus for mineral slurries, characterised in that, include: The dilution tank has a slurry inlet, a dilution water inlet, and a reagent inlet at the top, and a slurry outlet at the bottom. The slurry inlet is used to inject slurry into the dilution tank, the dilution water inlet is used to add clean water into the dilution tank to dilute the slurry, the reagent inlet is used to add reagent into the dilution tank, and the slurry outlet is used to discharge the liquid in the dilution tank. A medicine container is connected to the dilution container. The medicine container is provided with a liquid outlet, which is connected to the medicine inlet, for conveying the medicine into the dilution container. A concentration meter is installed upstream of the slurry inlet to determine the concentration of the slurry entering the dilution tank from the slurry inlet.

2. The dilution flocculation of a mineral slurry installation according to claim 1, wherein, The slurry dilution and flocculation equipment also includes: An air intake pipe is provided, with one end connected to the dilution tank and the other end connected to an external high-pressure air source. It is used to fill the dilution tank with gas to empty the liquid inside the dilution tank.

3. The dilution flocculation of a mineral pulp installation according to claim 2, wherein, The slurry dilution and flocculation equipment also includes an exhaust valve, installed on the top of the dilution tank, for discharging gas from the dilution tank.

4. The dilution flocculation apparatus for mineral slurries according to claim 3, wherein, The slurry dilution and flocculation equipment also includes a pressure transmitter, which is installed at the top of the dilution tank to determine the pressure difference between the inside and outside of the dilution tank.

5. The dilution flocculation apparatus for mineral slurries according to claim 2, wherein, The slurry dilution and flocculation equipment also includes: A safety valve, connected to the dilution tank, is used to open and release gas from the dilution tank when the gas pressure inside the tank exceeds a preset value; and / or, A pressure reducing valve, connected to the dilution tank, is used to adjust the outlet pressure of the dilution tank.

6. The dilution flocculation of a mineral slurry according to claim 1, wherein, The slurry dilution and flocculation equipment also includes: A self-priming sewage pump is connected to the dilution tank and is used to open it to empty the liquid in the dilution tank.

7. The dilution flocculation plant for mineral slurries according to any one of claims 1-6, wherein, The slurry dilution and flocculation equipment also includes: A slurry feed pipe is connected to the slurry inlet and is used to transport slurry from the outside to the slurry inlet. A water inlet pipe is connected to the dilution inlet and is used to deliver clean water from the outside to the dilution inlet. The slurry feed pipe is connected to the water inlet pipe, and a valve is provided in the connection passage between the slurry feed pipe and the water inlet pipe. The valve is used to open in the cleaning state of the slurry dilution and flocculation equipment so that clean water flows into the slurry feed pipe.

8. The dilution flocculation of a mineral slurry apparatus according to claim 1, wherein, The slurry dilution and flocculation equipment also includes: A level gauge, installed on top of the dilution tank, is used to determine the liquid level height within the dilution tank; and / or, A metering pump is installed in the connection passage between the liquid outlet and the drug inlet to control the dosage of the drug entering the dilution tank from the drug container.

9. The dilution flocculation of a mineral slurry installation according to claim 1, wherein, The slurry dilution and flocculation equipment also includes: A stirring paddle, installed inside the dilution tank, is used to rotate and stir the liquid inside the dilution tank; A stirring pump, installed outside the dilution tank and connected to the stirring paddle, is used to drive the stirring paddle to rotate.

10. A sample preparation apparatus, characterized in that it comprises: The slurry dilution and flocculation equipment as described in any one of claims 1-9; A dewatering device, connected to the slurry dilution and flocculation equipment, is used to receive the slurry discharged from the slurry dilution and flocculation equipment and dewater the slurry to make cake samples.

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