A circulating water filtering device and a sample preparation device

Abstract

This disclosure relates to the field of ash content detection technology, specifically to a circulating water filtration device and sample preparation apparatus. The circulating water filtration device includes: a filter, comprising an inlet, an outlet, and a waste discharge port located at the bottom of the filter, for receiving and filtering wastewater. Wastewater enters the filter through the inlet, and filtered clean water is discharged through the outlet, while impurities filtered from the wastewater are discharged through the waste discharge port; a water storage tank, connected to the outlet of the filter, for receiving and storing the filtered clean water and for transporting the clean water to an outlet pipeline, which receives the clean water and discharges it from the circulating water filtration device; and a pressure stabilizing tank, connected to the outlet pipeline, for regulating the water pressure within the outlet pipeline. This disclosure enables the filtration, storage, and transportation of wastewater, effectively improving the filtration effect, achieving fine filtration treatment, avoiding the influence of suspended solids on the accuracy of slurry sample detection, and improving the accuracy of slurry sample preparation and ash content detection.

Description

Technical Field

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

[0002] Ash content testing uses techniques such as X-ray fluorescence to analyze samples and determine the types and amounts of ash present. For coal ash, which refers to the mineral residue remaining after complete combustion under specified conditions, ash content testing allows for a more accurate assessment of coal quality, providing significant guidance for subsequent mining and sorting processes. For ash content testing of flotation concentrate, the slurry is typically dewatered and prepared into cake samples. The composition of these cake samples is then analyzed to determine the slurry's composition. However, ash content testing consumes a large amount of water, and the use of ash testing instruments requires significant amounts of clean water for cleaning the pipelines. Directly discharging the resulting wastewater leads to substantial water resource waste. Furthermore, during the process of dewatering and cake-making slurry, the liquid separated from the slurry contains a lot of impurities that are difficult to process. In addition, for mining operations, the water quality stability of the closed-loop circulating water is poor, with a lot of suspended solids. When this closed-loop circulating water is used to clean related equipment, it is easy to cause the accumulation of suspended solids, leading to pipeline blockage or sample contamination, which affects the accuracy of slurry sample preparation and ash content detection. Utility Model Content

[0003] To overcome the problems existing in related technologies, an exemplary embodiment of this disclosure provides a circulating water filtration device, comprising: a filter, including an inlet, an outlet, and a waste discharge port disposed at the bottom of the filter, for receiving and filtering wastewater, wherein the wastewater enters the filter through the inlet, filtered clean water is discharged through the outlet, and impurities filtered in the wastewater are discharged through the waste discharge port; a water storage tank, connected to the outlet of the filter, for receiving and storing the clean water filtered by the filter, and for conveying the clean water to an outlet pipeline, wherein the outlet pipeline is used to receive clean water and discharge clean water from the circulating water filtration device; and a pressure stabilizing tank, connected to the outlet pipeline, for regulating the water pressure in the outlet pipeline.

[0004] In some embodiments, the circulating water filtration device further includes a pressure relief valve, which is disposed in the flow path connecting the pressure stabilizing tank and the outlet pipe. The pressure relief valve is used to open to discharge clean water and reduce the water pressure in the outlet pipe.

[0005] In some embodiments, the circulating water filtration device further includes: an external water pipe connected to the outlet pipe for receiving clean water delivered by the outlet pipe and delivering the clean water to an external water device; the external water pipe includes a manual drain port connected to the outlet pipe for manually opening to allow clean water in the outlet pipe to flow out from the manual drain port.

[0006] In some embodiments, the external water supply line further includes a dilution outlet, which is used to connect to an external device to supply clean water to the external device.

[0007] In some embodiments, the circulating water filtration device further includes a constant pressure pump, one end of which is connected to the water storage tank and the other end of which is connected to the water outlet pipeline, for pumping clean water from the water storage tank to the water outlet pipeline.

[0008] In some embodiments, the circulating water filtration device further includes a buffer tank, connected to the filter, for containing wastewater supplied from the outside and conveying the wastewater to the filter.

[0009] In some embodiments, the circulating water filtration device further includes an overflow valve, disposed in the outlet pipe of the buffer tank, for opening to stabilize the water pressure in the outlet pipe of the buffer tank.

[0010] In some embodiments, the circulating water filtration device further includes a level gauge disposed on the top of the water storage tank for detecting the liquid level height inside the water storage tank.

[0011] In some embodiments, the circulating water filtration device further includes: a first solenoid valve connected to the waste outlet of the filter, for opening when the filter is in a clean state to discharge the wastewater after cleaning; and a second solenoid valve connected to the filter and the water storage tank, for opening when the filter is in a clean state to allow clean water in the water storage tank to enter the filter.

[0012] Secondly, this disclosure also provides a sample preparation apparatus, comprising: a slurry dilution and flocculation device for diluting slurry and flocculating impurities in the slurry; a dewatering device connected to the slurry dilution and flocculation device for receiving the diluted slurry discharged from the slurry dilution and flocculation device and dewatering the slurry to prepare a cake sample; and a circulating water filtration device as described in the first aspect, connected to the slurry dilution and flocculation device for supplying clean water to the slurry dilution and flocculation device and connected to the dewatering device for receiving wastewater discharged from the dewatering device.

[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] The circulating water filtration equipment provided in this disclosure enables the filtration, storage, and transportation of wastewater, effectively improving the filtration efficiency, removing a large amount of suspended solids, achieving fine filtration treatment, improving the quality of the filtered water, and preventing suspended solids from affecting the accuracy of slurry sample testing. This, in turn, effectively improves the accuracy of slurry sample preparation and ash content detection. Furthermore, the circulating water filtration equipment provided in this disclosure can store the filtered water and transport it out as needed, offering easy control and high transportation stability. 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 circulating water filtration device structure shown according to another exemplary embodiment disclosed;

[0017] Figure 2 This is a schematic diagram of a circulating water filtration device structure shown according to another exemplary embodiment disclosed;

[0018] Figure 3 This is a schematic diagram of a sample preparation apparatus structure shown according to an exemplary embodiment disclosed in a book. Detailed Implementation

[0019] The following describes specific embodiments of this disclosure. It should be noted that, in order to maintain brevity, this specification cannot provide a detailed description of 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 herein, changes in design, manufacturing, or production based on the technical content disclosed herein are merely conventional technical means and should not be construed as insufficient content of this disclosure.

[0020] 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.

[0021] In the process of slurry sampling and testing, to ensure the accuracy of slurry testing, it is necessary to clean the relevant components and pipelines of the equipment after each slurry sampling and preparation to avoid residual slurry affecting the next batch of slurry. Therefore, there are requirements for the suspended solids content in the water used for cleaning slurry pipelines and equipment. The types of suspended solids in the circulating water vary in different mining areas. For example, in the circulating water of a coal preparation plant, these suspended solids are mainly composed of fine mineral particles such as kaolin and coal powder. If circulating water with a high suspended solids content is used to clean the pipeline, the suspended solids will accumulate in certain places in the pipeline, gradually increasing the contamination of the slurry sample over time. This poses an uncontrollable risk to the accuracy of the detection of target elements in the slurry. This is especially true in scenarios where the slurry needs to be diluted and flocculated before sample preparation and testing. If the dilution water contains a large amount of suspended solids, mixing it into the slurry to be tested and having it all settle and participate in sample preparation under flocculation will cause serious contamination of the slurry sample, leading to large errors in the slurry test results and affecting the accuracy of the slurry testing. The quality of closed-loop circulating water currently used by industrial and mining enterprises is lower than the requirements for pipeline cleaning water, and the water quality stability of these closed-loop circulating waters is poor. If they are added to slurry samples or used for pipeline cleaning, it will affect the accuracy of slurry sample preparation and testing.

[0022] To solve the above technical problems, such as Figure 1 As shown, this disclosure provides a circulating water filtration device 100, which may include: a filter 110, a water storage tank 120, and a pressure stabilizing tank 130.

[0023] Filter 110 includes an inlet, an outlet, and a waste discharge port located at the bottom of filter 110. It is used to receive and filter wastewater. Wastewater enters filter 110 through the inlet, and filtered clean water is discharged through the outlet. Impurities filtered from the wastewater are discharged through the waste discharge port. Filter 110 can be used to filter impurities in wastewater, such as suspended solids like soil and coal dust. The inlet of filter 110 can be located on the periphery of the filter 110 housing. Wastewater discharged from other equipment can enter filter 110 through a pipeline via the inlet. Wastewater discharged from other equipment can be pumped into filter 110 by a wastewater pump, rapidly filling the wastewater tank of filter 110. The wastewater tank is enclosed by filter bags used for wastewater filtration within filter 110, and wastewater is continuously pumped into the wastewater tank by the wastewater pump. Under continuous water pressure, the liquid in the wastewater tank permeates through the filter bag into the clean water tank, while solid particles in the wastewater cannot pass through the filter bag and are trapped in the wastewater tank. This achieves wastewater purification, separating solid particles from the liquid. Clean water can then pass through the filter bag into the clean water tank of filter 110 and flow into the storage tank 120 along the outlet pipe. A level gauge 180 can be installed at the top of the storage tank 120 to monitor the liquid level. When the level in the storage tank reaches a certain height, the pumping of wastewater into filter 110 can be stopped. In other embodiments, when the wastewater reaches a certain level, the liquid supply to filter 110 can be stopped, or the inlet can be closed to stop the supply of wastewater to filter 110. Subsequently, the wastewater inside filter 110 can be filtered and purified.

[0024] The filter 110 may have an outlet on its periphery, which opens simultaneously during the processes of supplying wastewater to the filter 110, filtering the wastewater through the filter 110, and cleaning the filter 110. After the filter 110 completes the filtration of the wastewater, the filtered clean water can be directly transported from the outlet to the storage tank 120 for storage. Specifically, after the filter 110 completes the filtration of the wastewater, the solid particles and suspended matter filtered out of the wastewater will adhere to the filter bag of the filter 110. Therefore, clean water in the storage tank can be transported into the filter 110 to rinse the filter bag. The wastewater containing solid particles and suspended matter generated after rinsing the filter 110 can be discharged outward from the waste outlet at the bottom of the filter 110. In some embodiments, the filter 110 can be a filter bag type backwash filter 110. When wastewater enters the filter 110 through the inlet, it can be filtered through the filter bag, so that suspended matter and other impurities are trapped inside the filter bag, and the filtered clean water can flow out from the outlet. When filter 110 is in the cleaning state, clean water can be injected into it to flush impurities off the filter bags. The wastewater from cleaning filter 110 is then discharged through the waste outlet. By using filter 110, high-quality filtration of wastewater can be achieved, allowing suspended solids to be removed. The filtered water meets the requirements for slurry dilution and equipment cleaning. Filter 110 ensures the filtered water has fewer impurities and higher stability, thereby further improving the accuracy of subsequent slurry sample preparation and testing equipment. The bag-type backwash filter 110 allows for the replacement of filter screens of different sizes according to the needs of the filtered water. Furthermore, the filter bags do not require repeated disassembly and cleaning after installation; they can be cleaned internally within the filter 110 for reuse, resulting in a longer service life and lower operating costs.

[0025] The water storage tank 120, connected to the outlet of the filter 110, is used to receive and store the clean water filtered by the filter 110, and to transport the clean water to the outlet pipeline. The outlet pipeline receives the clean water and discharges it from the circulating water filtration device 100. The water storage tank 120 can be connected to the outlet of the filter 110, allowing the clean water obtained from filtration to be discharged into the water storage tank 120. The water storage tank 120 can store clean water. During the slurry dilution process in the slurry preparation device or during equipment cleaning, the clean water in the water storage tank 120 can be transported to the outlet pipeline, which then transports the clean water to the mixing tank for slurry dilution in the slurry preparation device or to the equipment and pipelines to be cleaned. The water storage tank 120 has a large capacity and can hold a certain amount of clean water.

[0026] A pressure stabilizing tank 130, connected to the outlet water pipeline, is used to regulate the water pressure within the outlet pipeline. The pressure stabilizing tank 130 can store clean water, allowing for real-time adjustment of the water pressure in the outlet pipeline during the process of clean water being transported outwards from the water storage tank 120. Specifically, a standard pipeline water pressure can be preset so that the water pressure in the outlet pipeline maintained by the clean water transported outwards from the water storage tank 120 is at this standard pipeline water pressure. The pressure stabilizing tank 130 may be equipped with an air bladder to isolate the water and gas within the tank, achieving pressure stabilization, buffering, and energy storage functions. The pressure stabilizing tank 130's air bladder pressure is adjusted to be lower than the set water supply pressure of the water supply pipeline. During the initial water supply, the water pressure in the pipeline is greater than the air pressure inside the pressure stabilizing tank 130. Water enters the pressure stabilizing tank 130 under the pressure difference, compressing the internal air bladder and increasing the pressure inside. When the pressure inside the air bladder matches the water pressure in the water supply pipeline, no more water can enter the pressure stabilizing tank 130. Subsequent water supply operations, when the water pressure in the pipeline is lower than the set water supply pressure, allow the pressure stabilizing tank 130 to supply water to stabilize the water supply pressure. Specifically, the pressure stabilizing tank 130 can be 200L and pressure-resistant to 1MPa.

[0027] According to the circulating water filtration equipment 100 provided in this disclosure, a large amount of suspended solids such as soil particles and coal dust in wastewater can be effectively filtered out, achieving fine filtration treatment of wastewater and obtaining high-quality clean water output. Through the structural design of replaceable filter bags and automatic backwashing, the equipment maintains high filtration efficiency while reducing maintenance difficulty and operating costs, avoiding downtime caused by frequent filter bag replacement due to clogging, and ensuring the stability and reliability of long-term clean water output. Since slurry dilution and ash content detection have high requirements for water purity, the circulating water filtration equipment 100, through filter 110, can effectively remove suspended solids from wastewater. The obtained clean water can be directly used for slurry dilution and equipment cleaning, helping to avoid residual impurities interfering with slurry sample preparation and testing data, thereby improving the consistency of slurry samples and the accuracy of testing data. The filtered clean water is stored and managed through a water storage tank 120. In subsequent use, clean water can be orderly transported to the target equipment through the outlet pipeline according to water demand for dilution, cleaning, etc., achieving quantitative control and continuous output of clean water supply. By setting up a pressure stabilizing tank 130, the water pressure in the outlet pipeline is kept stable, which reduces the risk of damage to the outlet pipeline and improves the overall stability and safety of the circulating water filtration equipment 100.

[0028] In some embodiments, the circulating water filtration device 100 may further include: a pressure relief valve 140, disposed in the flow path connecting the pressure stabilizing tank 130 and the outlet water pipe. The pressure relief valve 140 is used to open to discharge clean water and reduce the water pressure in the outlet water pipe. The pressure relief valve 140 can be kept in a normally closed state. A preset water pressure value can be set for the pressure relief valve 140. When the water pressure in the outlet water pipe is less than the preset water pressure value, the pressure relief valve 140 remains closed. When the water pressure in the outlet water pipe is greater than or equal to the preset water pressure value, the pressure relief valve 140 can be opened, allowing the clean water in the outlet water pipe to flow out through the pressure relief valve 140, thereby releasing pressure and reducing the clean water pressure in the outlet water pipe, thus preventing damage to the outlet water pipe or excessively fast water flow due to excessive water pressure.

[0029] The pressure relief valve 140 provided in this embodiment can further regulate the water pressure in the outlet pipeline, thereby enhancing the stability and safety of the circulating water filtration equipment 100. When the water pressure in the outlet pipeline rises due to abnormal water supply or pipeline blockage, the pressure relief valve 140 can automatically open when the water pressure reaches a preset value, releasing some clean water, reducing pipeline pressure, and preventing malfunctions such as outlet pipeline rupture or joint detachment caused by excessive water pressure. By gradually releasing pipeline water pressure through the pressure relief valve 140, a more stable clean water output can be achieved, which helps maintain the uniformity and controllability of subsequent slurry dilution or equipment cleaning processes, further improving the safety of the circulating water filtration equipment 100.

[0030] In some embodiments, such as Figure 1 As shown, the circulating water filtration device 100 may further include a constant pressure pump 160, one end of which is connected to a water storage tank 120 and the other end of which is connected to an outlet pipe, for pumping clean water from the water storage tank 120 to the outlet pipe. The constant pressure pump 160 can pump the clean water in the water storage tank 120 outwards, allowing the clean water to flow from the water storage tank 120 to the outlet pipe. The constant pressure pump 160 can be preset with an outlet pressure to ensure a constant water pressure flowing from the water storage tank 120 to the outlet pipe, thereby improving the safety of the circulating water filtration device 100 and preventing damage to the outlet pipe due to excessive water pressure or failure to output water due to insufficient water pressure.

[0031] Specifically, the outlet pressure of the water storage tank 120 to the outlet pipe can be set to 0.3 MPa, that is, the outlet pressure of the constant pressure pump 160 can be set to 0.3 MPa, the initial pressure of the air bladder of the pressure stabilizing tank 130 can be adjusted to 0.15 MPa, and the preset water pressure value of the pressure relief valve 140 can be set to 0.5 MPa. When the water pressure in the outlet pipe is detected to be lower than the preset outlet pressure of 0.3 MPa from the water storage tank 120 to the outlet pipe, clean water can be continuously pumped out of the outlet pipe by the constant pressure pump 160, and water can be introduced into the pressure stabilizing tank 130 until the gas in the pressure stabilizing tank 130 is compressed and its pressure reaches 0.3 MPa and is the same as the water pressure in the outlet pipe. At this time, the pressure in the pressure stabilizing tank 130 is the same as the water pressure in the outlet pipe, and the water in the outlet pipe will not re-enter the pressure stabilizing tank. Therefore, the pressure stabilizing tank can be kept open or closed to further prevent water from entering the pressure stabilizing tank 130. Therefore, when the water pressure in the outlet pipe is low, the pressure stabilizing tank 130 can increase the water pressure in the outlet pipe, thus maintaining a stable water pressure and achieving pressure stabilization. When the water pressure in the outlet pipe is too high, exceeding the preset water pressure value of the pressure relief valve 140 by 0.5 MPa, the pressure relief valve 140 can automatically open, allowing clean water to flow out from the pressure relief valve 140, thereby relieving pressure in the outlet pipe and ensuring stable water pressure in the outlet pipe.

[0032] According to the circulating water filtration device 100 provided in this embodiment, by setting a constant pressure pump 160, the outlet water pressure can be preset, and the output flow rate can be adjusted according to the pressure change of the outlet water pipeline to ensure that the water pressure delivered to the outlet water pipeline remains stable. When the water pressure in the outlet water pipeline is detected to be lower than the set pressure of the constant pressure pump 160, the constant pressure pump 160 can continuously pump clean water into the outlet water pipeline and simultaneously deliver clean water to the pressure stabilizing tank 130, so that the gas in the pressure stabilizing tank 130 is compressed and stored. When the gas pressure in the pressure stabilizing tank 130 rises to the same level as the water pressure in the pipeline, the system can automatically stop the water supply to the pressure stabilizing tank 130. Through the linkage control of the constant pressure pump 160, the pressure stabilizing tank 130, and the pressure relief valve 140, the constant pressure stable output of clean water and the automatic adjustment of water pressure can be further realized, improving the operational stability and safety of the circulating water filtration device 100.

[0033] In some embodiments, the circulating water filtration device 100 may further include: an external water supply pipe connected to an outlet water supply pipe, for receiving clean water delivered by the outlet water supply pipe and delivering the clean water to external water supply equipment. For example... Figure 1As shown, the external water supply pipeline can be connected to the outlet water supply pipeline, enabling the supply of clean water to other equipment outside the circulating water filtration equipment 100, such as slurry dilution and flocculation equipment, to dilute the slurry or clean the external equipment. The external water supply pipeline may include a manual drain port 151, connected to the outlet water supply pipeline, for manual opening to allow clean water in the outlet water supply pipeline to flow out through the manual drain port 151. The manual drain port 151 may be equipped with a manual gate valve, which can be normally closed. The manual drain port 151 can be used for manual water sampling to facilitate the sampling and testing of the liquid in the external water supply pipeline, thereby determining whether the liquid in the external water supply pipeline meets the equipment's requirements for filtered clean water. When the circulating water filtration equipment 100 malfunctions, causing excessive water pressure in the external water supply pipeline or excessive impurities in the liquid in the external water supply pipeline, preventing the supply to other equipment, the manual gate valve located at the manual drain port 151 can also be manually opened to allow the liquid in the external water supply pipeline to be discharged, achieving the function of pressure relief or waste discharge, facilitating maintenance.

[0034] According to the circulating water filtration device 100 provided in this embodiment, by setting an external water supply pipeline, it can be connected to the outlet water supply pipeline to receive filtered clean water and transport it to external water supply equipment such as slurry dilution and flocculation equipment. This enables efficient reuse of circulating water resources. The clean water in the external water supply pipeline can be used for slurry dilution or equipment cleaning, improving the overall water efficiency of the system, realizing wastewater recycling, and reducing production water costs. The external water supply pipeline is equipped with a manual drain port 151, which allows manual opening of a manual gate valve to release clean water. This facilitates convenient on-site sampling and testing of filtered water samples, thereby enabling real-time evaluation of the filtration effect and whether the water quality meets the process requirements of downstream water supply equipment, improving the filtration accuracy of the circulating water filtration device 100. The manual drain port 151 also provides an emergency discharge channel in case of equipment malfunction, excessive water pressure, or excessive liquid impurities. By opening the manual gate valve to release excess pressure or discharge abnormal liquid, it helps to prevent equipment damage or system shutdown, improving the safety of the circulating water filtration device 100 and making the circulating water filtration device 100 easy to maintain.

[0035] In some embodiments, the external water supply pipeline may further include a dilution outlet 152, which is used to connect to an external device to supply clean water to the external device. The dilution outlet 152 may be equipped with a solenoid valve, which can be normally closed to effectively prevent the outflow of clean water. When the external device needs clean water for cleaning, or when the external device is a slurry dilution and flocculation device that needs clean water to dilute the slurry, the solenoid valve can be opened, allowing clean water to flow out from the dilution outlet 152, thereby supplying clean water to the external device. Furthermore, as... Figure 1As shown, a manual gate valve can also be installed at the dilution outlet 152. The manual gate valve can be in the normally open state. If the solenoid valve fails and cannot be closed, or if the liquid impurities in the external water pipe exceed the standard, the gate valve can be manually closed to prevent the liquid in the external water pipe from flowing out.

[0036] The circulating water filtration device 100 provided in this embodiment can supply clean water to external equipment through the dilution outlet 152. The dilution outlet 152 can be equipped with a solenoid valve, which is normally closed to effectively prevent the outflow of clean water when not in operation, thereby improving the water safety of the equipment and saving water resources. When external equipment needs cleaning or slurry dilution, the solenoid valve can automatically open to ensure that clean water is supplied smoothly to the target equipment to meet the usage requirements. The dilution outlet 152 can also be equipped with a manual gate valve, which is normally open. In case of solenoid valve failure that prevents normal closure, or when liquid impurities exceed the standard in the external water pipeline, the operator can manually close the gate valve to effectively prevent clean water leakage or abnormal water from entering the external system, thereby improving the overall system safety and risk resistance. The circulating water filtration device 100 provided in this disclosure not only improves the clean water filtration effect and quality, but also has excellent water storage and supply functions, and has higher safety, flexibility and stability.

[0037] In some embodiments, such as Figure 3As shown, the circulating water filtration equipment 100 may further include a buffer tank 170, connected to the filter 110, for containing wastewater supplied from the outside and conveying the wastewater to the filter 110. The buffer tank 170 may be in the shape of an inverted cone, such that the cross-sectional area of ​​the upper part of the buffer tank 170 is larger than the cross-sectional area of ​​the lower part of the buffer tank 170. This facilitates the buffer tank to receive and store wastewater supplied by other equipment, so as to facilitate subsequent centralized filtration and purification of the wastewater. The buffer tank 170 may be located below the slurry dilution flocculation equipment and the dewatering device. The cross-section of the upper part of the buffer tank 170 can completely cover the vertical projection of the slurry dilution flocculation equipment and the dewatering device, thereby effectively saving space. The dewatering device can be connected to the buffer tank 170, allowing wastewater generated from dewatering the slurry to flow into the buffer tank 170. Since the dewatering device can be positioned above the buffer tank 170, and its projection onto the top surface of the buffer tank 170 is entirely within the top surface area, the pipeline between the dewatering device and the buffer tank 170 can be vertically installed. This allows wastewater to flow vertically downwards through the pipeline into the buffer tank 170. Because the wastewater may contain sludge and other impurities, the positional relationship between the dewatering device and the buffer tank 170, and the vertical installation of the pipeline, avoids bends in the pipeline, further preventing sludge buildup and blockages at bends, thus keeping the pipeline between the dewatering device and the buffer tank unobstructed. This further improves the safety of the sample preparation device, extends its service life, avoids frequent replacement and cleaning of the pipeline, and effectively saves costs. Furthermore, by making the buffer tank 170 an inverted cone shape and by giving the upper cross-section of the buffer tank 170 a large area, the vertical dimensions of the buffer tank 170 can be effectively reduced while ensuring the capacity of the buffer tank 170. This makes the vertical structure of the sample preparation device more compact, reduces the space occupied by the sample preparation device, and facilitates the user's adjustment, movement, and maintenance of the sample preparation device. This gives the sample preparation device greater flexibility and allows it to adapt to relatively narrow and low environments, effectively improving the adaptability of the sample preparation device.

[0038] In some embodiments, such as Figure 1As shown, the circulating water filtration device 100 may further include: an overflow valve, installed in the outlet pipe of the buffer tank 170, used to open to stabilize the water pressure in the outlet pipe of the buffer tank 170. The outlet pipe at the bottom of the buffer tank 170 can be divided into two branches. The first branch can be connected to the filter 110, enabling the wastewater stored in the buffer tank 170 to be pumped into the filter by a wastewater pump. The second branch of the outlet pipe of the buffer tank 170 can be equipped with an overflow valve, and the second branch can be reconnected to the buffer tank 170. When the first branch line or filter 110 becomes clogged, causing excessive water pressure in the pipeline connected to buffer tank 170, the water pressure in the pipeline exceeds the threshold of the overflow valve. This causes the overflow valve to open, returning the wastewater in the pipeline to buffer tank 170, achieving a better pressure stabilization effect. Simultaneously, it prevents damage to the outlet pipeline and wastewater pump due to excessive water pressure, thus protecting the wastewater pump and the outlet pipeline of buffer tank 170 and improving the safety of the circulating water filtration equipment 100. This enhances the pressure stabilization and fault mitigation capabilities of the circulating water filtration equipment 100 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.

[0039] In some embodiments, such as Figure 1As shown, the circulating water filtration device 100 may further include: a level gauge 180, installed on the top of the water storage tank 120, for detecting the liquid level in the water storage tank 120. The level gauge 180 can be installed on the top of the water storage tank 120 to detect the liquid level in the water storage tank 120, thereby determining the amount of clean water in the water storage tank 120, which in turn controls the opening and closing of the inlet of the filter 110, or further enables real-time adjustment of the amount of wastewater supplied to the filter 110. Specifically, when the liquid level in the water storage tank 120 is lower than a preset level, wastewater can be continuously supplied to the filter 110 to continuously filter the wastewater and replenish the water storage tank with purified clean water. Furthermore, when the liquid level in the water storage tank 120 is lower than the preset level, the amount of wastewater supplied to the filter can be increased to filter more wastewater, improve wastewater filtration efficiency, and replenish the water storage tank 120 with purified clean water. When the liquid level in the water storage tank 120 reaches the preset level, the inlet of the filter can be closed, ensuring that the amount of clean water in the water storage tank 120 is sufficient to supply external equipment. A maximum and a minimum liquid level can be preset in the water storage tank 120, with the minimum level determined by the equipment connected to the circulating water filtration device 100. When the level gauge 180 detects that the water level in the water storage tank 120 is lower than the minimum level, wastewater can be supplied to the filter 110 through external equipment. The filter 110 continuously filters the wastewater and delivers the filtered clean water to the water storage tank 120, causing the liquid level in the tank 120 to rise above the minimum level, thus ensuring water supply to external equipment. When the level gauge 180 detects that the water level in the storage tank 120 has reached its maximum height, it can stop supplying wastewater to the filter 110 from external equipment, thereby stopping wastewater filtration and preventing the water level in the storage tank 120 from becoming too high and exceeding its maximum storage capacity, which would cause clean water to overflow. The level gauge 180 continuously monitors the water level in the storage tank 120 of the circulating water filtration equipment 100, ensuring that the storage tank 120 always maintains a sufficient volume of clean water to stably supply external equipment, improving the continuity and reliability of system operation. The level gauge 180 not only enables intelligent adjustment of the water level in the storage tank 120, but also effectively improves the automation level and operational safety of the circulating water filtration system, ensuring the continuity and stability of the system's water supply, avoiding water waste and equipment malfunctions, and contributing to the efficient and stable operation of the system.

[0040] In some embodiments, such as Figure 1 As shown, the circulating water filtration device 100 may further include: a first solenoid valve 191 and a second solenoid valve 192.

[0041] The first solenoid valve 191 is connected to the waste outlet of the filter 110 and is used to open when the filter 110 is in a clean state to discharge the wastewater after cleaning. The first solenoid valve 191 can be connected to the waste outlet of the filter 110. When the filter 110 is in operation and filtering wastewater, the first solenoid valve 191 can remain closed. After the wastewater has been filtered and all the clean water has flowed from the outlet to the storage tank 120, the first solenoid valve 191 can open, thereby discharging the precipitated impurities inside the filter 110. When the filter 110 is in a clean state, the first solenoid valve 191 can open, thereby discharging the wastewater generated after cleaning the filter 110 outside the filter 110.

[0042] The second solenoid valve 192, connecting the filter 110 and the water storage tank 120, is used to open when the filter 110 is in a clean state, allowing clean water from the water storage tank 120 to enter the filter 110. The second solenoid valve 192 can connect the water storage tank 120 and the filter 110. When the filter 110 is in operation, the second solenoid valve 192 can be closed to prevent clean water from the water storage tank 120 from flowing back into the filter 110. When the filter 110 is in a clean state, the second solenoid valve 192 can open, delivering clean water from the water storage tank 120 into the filter 110 to clean it. After cleaning, the clean water is discharged from the filter 110 through the waste outlet.

[0043] The circulating water filtration device 100 provided in this embodiment, through the first solenoid valve 191 and the second solenoid valve 192 respectively installed at the waste outlet and liquid outlet of the filter 110, can intelligently control the drainage path of the filter 110 under different working conditions, thereby improving the quality of clean water and the degree of automation of system control. The first solenoid valve 191 is connected to the waste outlet of the filter 110 and is used to open when the filter 110 is in a cleaning state to discharge the wastewater generated during the cleaning process. Under normal filtration conditions, the first solenoid valve 191 is in a closed state to prevent untreated wastewater from being discharged directly. After the filtration process is completed and all clean water has been discharged, or during the cleaning process, the first solenoid valve 191 is opened again to discharge the impurities and rinsing water washed off the surface of the filter bag from the waste outlet, effectively preventing impurity accumulation and improving filtration efficiency and filter bag lifespan. The second solenoid valve 192 can be opened during the cleaning process of the filter 110, so that the clean water in the water storage tank 120 can flow into the filter 110 through the second solenoid valve 192, thereby achieving backwashing cleaning of the filter 110. By coordinating the control of the first solenoid valve 191 and the second solenoid valve 192, not only is the automatic management of the filtration and cleaning process realized, but the water quality safety of the clean water in the water storage tank 120 is also ensured, effectively improving the operational stability, automation level and reliability of the entire circulating water filtration equipment 100.

[0044] Specifically, such as Figure 1 As shown, when the circulating water filtration device 100 is in operation, manual gate valve a and solenoid valve b can be opened, with manual gate valve a normally open, allowing wastewater to be supplied to the filter 110 from the outside. After closing solenoid valve b, the filter 110 can filter the wastewater. After filtration, the filtered clean water can flow into the storage tank 120 through the outlet. After the filter 110 completes filtration, the filtered solid particles will be adsorbed onto the filter bag of the filter 110. Therefore, the filter 110 can be cleaned so that the solid particles fall off the surface of the filter bag and are discharged outside the filter 110 with the cleaned wastewater. The cleaning time and frequency of the filter 110 can be determined according to the water quality in the circulating water filtration device 100. When the filter 110 is in the cleaning state, the first solenoid valve 191 and the second solenoid valve 192 can be opened, allowing the clean water in the storage tank 120 to flow back into the filter 110 through the second solenoid valve 192 for backwashing the filter 110. The wastewater generated after cleaning can flow out through the waste outlet and the first solenoid valve 191, thereby achieving wastewater discharge. Figure 3 As shown, the wastewater generated during the cleaning of filter 110 can flow into buffer tank 170, so that the wastewater in buffer tank 170 can be subsequently transported to filter 110 in operation, achieving filtration and reuse of the wastewater. After cleaning filter 110 is completed, the first solenoid valve 191 and the second solenoid valve 192 can be closed, allowing filter 110 to return to operation and continue wastewater filtration. Through the above-described filtration and cleaning process of circulating water filtration equipment 100, the circulating water filtration equipment 100 can achieve filtration, sludge discharge, backwashing, and wastewater recovery during operation. This gives the circulating water filtration equipment 100 not only good filtration performance but also automatic cleaning and wastewater recycling capabilities, as well as high filtration efficiency. This significantly improves the intelligence, filtration stability, and resource utilization of the circulating water filtration equipment 100, enabling it to be widely used in industrial water treatment scenarios requiring continuous operation.

[0045] Based on the same inventive concept, such as Figure 2 , Figure 3 As shown, this disclosure also provides a sample preparation apparatus, which may include: a slurry dilution and flocculation device 210, a dewatering device 220, and a circulating water filtration device 100 as described in any of the foregoing embodiments.

[0046] The slurry dilution and flocculation device 210 is used to dilute slurry and flocculate impurities in the slurry. The slurry dilution and flocculation device 210 may include a mixing tank and a dosing device. The mixing tank is used to agitate and dilute the slurry. A slurry inlet is located at the top of the mixing tank and can be connected to an external feeding device, allowing the slurry to enter the mixing tank through the slurry inlet. A dilution inlet can also be located on the upper periphery of the mixing tank. This dilution inlet can be connected to a circulating water filtration device 100, allowing purified water from the circulating water filtration device 100 to enter the mixing tank through the dilution inlet and mix with the slurry, thereby diluting the slurry in the mixing tank. The dosing device can be connected to the mixing tank to deliver flocculant, causing the small particles in the slurry to agglomerate. The flocculant, added to the mixing tank through the dosing device, causes the fine high-ash particles, fine coal powder, and other small particles in the slurry to flocculate into agglomerates, thus separating the liquid in the slurry from the agglomerated high-ash particles and fine coal powder. The mixing tank allows for thorough mixing of the flocculant with the slurry and water, enabling the flocculant to flocculate more of the fine hydrophilic particles in the slurry into clusters, thus effectively improving the solid-liquid separation of the slurry. Therefore, the slurry dilution and flocculation equipment 210 ensures the uniformity and reliability of slurry sample preparation and the accuracy of slurry testing.

[0047] The dewatering device 220, connected to the slurry dilution and flocculation equipment 210, receives the diluted slurry discharged from the slurry dilution and flocculation equipment 210 and dewaters it to make cake samples. The dewatering device 220 can be installed in front of the slurry dilution and flocculation equipment 210 and connected to the mixing tank. After being diluted and flocculated by the dilution device, the slurry can enter the dewatering device 220 through the feed inlet from the mixing tank. The dewatering device 220 dewaters the liquid slurry and presses it into a solid cake sample for subsequent identification and testing. The dewatering device 220 enables solid-liquid separation of the slurry. After dewatering and sample preparation, the solid cake sample can be transported to a testing device connected to the slurry sample preparation device to detect its internal components; while the liquid separated from the slurry can be transferred to the circulating water filtration equipment 100. The dewatering device 220 can be connected to the circulating water filtration device 100, allowing the liquid portion of the slurry separated in the dewatering device 220 to enter the circulating water filtration device 100 for filtration and recycling. The dewatering device 220 can form a smooth cake from the slurry. Due to the dilution by the dilution device and the flocculation of fine hydrophilic particles, the cake produced by the dewatering device 220 has a consistent thickness and is relatively uniform, thus improving the accuracy of subsequent cake testing. It also flocculates fine particles, preventing their outflow and ensuring the accuracy of subsequent cake testing.

[0048] A circulating water filtration device 100 is connected to a slurry dilution and flocculation device 210 to supply clean water to the slurry dilution and flocculation device 210, and is also connected to a dewatering device 220 to receive wastewater discharged from the dewatering device 220. The circulating water filtration device 100 can receive wastewater discharged from the dewatering device 220, and simultaneously supply clean water to both the slurry dilution and flocculation device 210 and the dewatering device 220, thereby cleaning the slurry dilution and flocculation device 210. The circulating water filtration device 100 can also supply clean water to the slurry dilution and flocculation device 210 to dilute the slurry. The circulating water filtration device 100 enables the recycling of wastewater within the sample preparation device, effectively saving water resources and improving the environmental performance of the sample preparation device. Furthermore, the circulating water filtration device 100 has good filtration performance, ensuring that the water quality supplied to the dilution and flocculation device meets predetermined requirements.

[0049] The sample preparation device provided in this embodiment, through the mixing tank and dosing device in the slurry dilution and flocculation equipment 210, can fully stir the slurry and uniformly mix it with clean water and flocculant, achieving effective flocculation of fine particles and promoting the agglomeration and sedimentation of fine impurities in the slurry, thereby significantly improving the solid-liquid separation efficiency of the subsequent dewatering device 220. The diluted and flocculated slurry can be stably fed into the dewatering device 220, where it forms a cake sample with uniform thickness and controllable moisture content through methods such as pressure filtration or centrifugation, effectively avoiding problems such as stratification and segregation that occur in traditional samples. The uniformity and stability of the cake sample help improve the accuracy of subsequent ash analysis and component detection. The circulating water filtration device 100 can receive the wastewater discharged from the dewatering device 220 and filter it to obtain reusable clean water. This clean water can not only be used for slurry dilution but also for equipment rinsing and maintenance, reducing external water consumption and significantly improving the system's resource utilization rate.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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 recirculating water filtration apparatus, characterized by, The circulating water filtration equipment includes: A filter includes an inlet, an outlet, and a waste outlet located at the bottom of the filter. It is used to receive and filter wastewater. The wastewater enters the filter through the inlet, and the filtered clean water is discharged through the outlet. The impurities filtered in the wastewater are discharged through the waste outlet. A water storage tank, connected to the outlet of the filter, is used to receive and store the clean water filtered by the filter, and to transport the clean water to the outlet pipe, wherein the outlet pipe is used to receive the clean water and discharge the clean water from the circulating water filtration equipment. A pressure stabilizing tank is connected to the water outlet pipeline and is used to regulate the water pressure in the water outlet pipeline.

2. The recirculating water filter apparatus of claim 1, wherein, The circulating water filtration equipment also includes: A pressure relief valve is installed in the flow path connecting the pressure stabilizing tank and the water outlet pipeline. The pressure relief valve is used to open to discharge clean water and reduce the water pressure in the water outlet pipeline.

3. The recirculating water filter apparatus of claim 1, wherein, The circulating water filtration equipment also includes: An external water supply pipeline is connected to the outlet water supply pipeline to receive clean water delivered by the outlet water supply pipeline and to deliver the clean water to external water supply equipment. The external water supply pipeline includes a manual drain port, which is connected to the outlet pipeline and is used to manually open the outlet pipeline so that clean water in the outlet pipeline flows out through the manual drain port.

4. The recirculating water filter apparatus of claim 3, wherein, The external water supply pipeline also includes: A dilution outlet is provided for connection to external equipment to supply clean water to the external equipment.

5. The recirculating water filter apparatus of claim 1, wherein, The circulating water filtration equipment also includes: A constant pressure pump, with one end connected to the water storage tank and the other end connected to the water outlet pipe, is used to pump clean water from the water storage tank to the water outlet pipe.

6. The recirculating water filter apparatus of claim 1, wherein, The circulating water filtration equipment also includes: A buffer tank, connected to the filter, is used to hold wastewater supplied from the outside and to transport the wastewater to the filter.

7. The recirculating water filter apparatus of claim 6, wherein, The circulating water filtration equipment also includes: An overflow valve is installed in the outlet pipe of the buffer tank to open and stabilize the water pressure in the outlet pipe of the buffer tank.

8. The recirculating water filter apparatus of claim 1, wherein, The circulating water filtration equipment also includes: A level gauge is installed on the top of the water storage tank to detect the liquid level inside the tank.

9. The recirculating water filter apparatus of claim 1, wherein, The circulating water filtration equipment also includes: The first solenoid valve is connected to the waste outlet of the filter and is used to open when the filter is in a clean state to discharge the wastewater after cleaning. The second solenoid valve, which connects the filter and the water storage tank, is used to open when the filter is in a clean state, so that clean water from the water storage tank can enter the filter.

10. A sample preparation device, characterized by include: Slurry dilution and flocculation equipment is used to dilute slurry and flocculate impurities in the slurry; A dewatering device, connected to the slurry dilution and flocculation equipment, is used to receive the diluted slurry discharged from the slurry dilution and flocculation equipment and dewater the slurry to make cake samples; The circulating water filtration device as described in any one of claims 1-9 is connected to the slurry dilution and flocculation device for supplying clean water to the slurry dilution and flocculation device, and is also connected to the dewatering device for receiving wastewater discharged from the dewatering device.

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