Slurry filtering and cleaning all-in-one machine

Abstract

The utility model provides a slurry filtering and cleaning all-in-one machine, the slurry filtering and cleaning all-in-one machine comprises a filtering disc, a driving part, a filtering pipe and a spray head, the driving part is in transmission connection with the filtering disc, the driving part can drive the filtering disc to rotate, so that the surface of the filtering disc sequentially passes through a preset immersion area, a cleaning area and a dewatering area, and the immersion area is used for containing slurry; the filter pipe is communicated with the interior of the filter disc, the filter pipe is used for generating negative pressure to suck filtrate, and the spray head is arranged in the cleaning area and used for spraying and cleaning the filter disc. The slurry filtering and cleaning all-in-one machine can reduce the crystallization phenomenon during dehydration of the filter cake, improve the recovery effect of the filter cake, and reduce the loss of filtrate at the same time. A slurry filtering and cleaning all-in-one machine is used in the filter field.

Description

Technical Field

[0001] This application relates to the field of filters, and in particular, to an integrated slurry filtration and cleaning machine. Background Art

[0002] A ceramic filter is a device that uses porous ceramic materials for vacuum suction filtration. Through the action of a porous ceramic filter plate, the ceramic filter can filter out solid particulate matter from the liquid, achieving the separation of solid and liquid. This type of filter is widely used in industries such as chemical engineering, food and beverage, medicine, and environmental protection. Due to the excellent properties of ceramics such as high temperature resistance, corrosion resistance, and wear resistance, ceramic filters play an irreplaceable role in fields such as mining and chemical engineering.

[0003] However, after suction filtration, there is still a certain amount of liquid attached to the filter cake. Especially for slurries containing many fine and complex materials, the moisture content of the filter cake often reaches more than 45%. Therefore, after the filter cake is dried, the substances in these liquids will crystallize and adhere to the product, affecting the whiteness and purity of the product. The attachment and crystallization of the liquid will also cause filtrate loss, which has a serious adverse impact on the process that requires the recovery or treatment of the filtrate.

[0004] In response to this situation, in related technologies, the filter cake is generally transported to a stirring tank, a large amount of clear water is added for stirring, and then filtered again to recover the filtrate. However, this method is not ideal enough. The filtrate recovery rate of a single cleaning is only about 55%, and it may need to be repeated many times to fully recover, which will lead to problems such as complex process flow, low efficiency, and large equipment investment. Summary of the Invention

[0005] This application aims to solve at least one of the technical problems existing in the prior art. For this purpose, this application proposes an integrated slurry filtration and cleaning machine, which can improve the recovery effect of the filter cake and reduce filtrate loss.

[0006] According to the integrated slurry filtration and cleaning machine provided by this application, it includes a filter disk, a driving member, a filter pipe, and a spray head. The driving member is in transmission connection with the filter disk, and the driving member can drive the filter disk to rotate so that the surface of the filter disk sequentially passes through a preset immersion area, a cleaning area, and a dehydration area. The immersion area is used to hold the slurry. The filter pipe is communicated with the inside of the filter disk, and the filter pipe is used to generate negative pressure to suck the filtrate. The spray head is arranged in the cleaning area, and the spray head is used to spray and clean the filter disk.

[0007] The integrated slurry filtration and cleaning machine provided by the present application has at least the following technical effects: During operation, the filter disc rotates cyclically, and the filter pipe generates negative pressure. In the immersion area, the suction effect of the filter pipe causes the liquid in the slurry to be sucked into the filter disc to generate filtrate, and the solids in the slurry adhere to the surface of the filter disc to form a filter cake; in the cleaning area, the spray head sprays cleaning liquid onto the filter cake on the surface of the filter disc; in the dehydration area, the suction effect of the filter pipe dehydrates the filter cake, thereby separating the solid components from the slurry. During the suction process, a part of the liquid will adhere and remain on the filter cake. During cleaning, on the one hand, the cleaning liquid and the original liquid on the filter cake are mixed, resulting in a decrease in the solute concentration in the liquid, promoting the further suction of the solute into the filter disc, thereby reducing the amount of solute remaining on the filter cake. On the other hand, the cleaning liquid can also play a certain scouring role, causing a part of the liquid that has not been sucked into the filter disc to separate from the filter cake, thereby further reducing the amount of solute on the filter cake. Therefore, the integrated slurry filtration and cleaning machine can reduce the crystallization phenomenon during filter cake dehydration, improve the recovery effect of the filter cake, and at the same time reduce the loss of filtrate.

[0008] According to some embodiments of the present application, the water spraying pressure of the spray head is between 0.1 Mpa and 0.2 Mpa.

[0009] According to some embodiments of the present application, the spray head is an atomizing spray head, and a plurality of the spray heads are arranged at intervals.

[0010] According to some embodiments of the present application, along the rotation direction of the filter disc, the spray heads are arranged at intervals from inside to outside in the radial direction, the axial interval of the spray heads is 30°, and the radial interval of the spray heads is 20 cm.

[0011] According to some embodiments of the present application, the range of the cleaning area is greater than or equal to 150°.

[0012] According to some embodiments of the present application, the rotation speed of the filter disc is from 0.7 r / min to 0.8 r / min.

[0013] According to some embodiments of the present application, the integrated slurry filtration and cleaning machine includes a partition board, and the partition board separates the cleaning area and the dehydration area.

[0014] According to some embodiments of the present application, the integrated slurry filtration and cleaning machine includes a scraper, and the scraper is arranged in the dehydration area and contacts the filter disc to scrape off the filter cake on the filter disc.

[0015] According to some embodiments of the present application, the integrated slurry filtration and cleaning machine includes a slurry pool for accommodating the slurry. The slurry pool is located below the filter disc, and the filter disc is partially located in the slurry pool in the horizontal direction. The slurry pool is configured to form the immersion area.

[0016] According to some embodiments of the present application, the integrated slurry filtering and cleaning machine includes a shield, the shield is installed on the slurry tank, a processing chamber is formed by enclosing the shield and the slurry tank, and the filter disc and the spray head are located in the processing chamber. Description of the Drawings

[0017] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1 is a side view schematic diagram of the integrated slurry filtering and cleaning machine according to some embodiments of the present application;

[0019] Figure 2 is a front view schematic diagram of the integrated slurry filtering and cleaning machine according to some embodiments of the present application.

[0020] Reference Signs:

[0021] Filter disc 110, driving member 120, main shaft 130, filter box 140, filter pipe 150;

[0022] Spray head 210, spray pipe 220, scraper 230, partition 240, slurry tank 250, shield 260, feed pipe 270. Detailed Embodiments

[0023] The embodiments of the present application will be described in detail below. The examples of the embodiments are shown in the drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application and should not be construed as a limitation to the present application.

[0024] In the description of the present application, it should be understood that the orientation or positional relationship indicated by terms such as up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0025] In the description of the present application, the meaning of several is one or more, the meaning of multiple is two or more, greater than, less than, exceeding, etc. are understood as not including the number itself, and above, below, within, etc. are understood as including the number itself. If there is a description of first and second, it is only for the purpose of distinguishing technical features and should not be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or the sequence of the indicated technical features.

[0026] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.

[0027] In the related art, porous ceramic materials are usually used to filter and separate the solid components (in the form of filter cake) and the liquid components (in the form of filtrate) in the slurry. However, for slurries containing many fine and complex materials in the solid components, the filter cake has a strong adsorption capacity, which will make the filter cake have a high water content. During dehydration, the solute in the liquid crystallizes, resulting in a decrease in the whiteness and purity of the filter cake and loss of the filtrate.

[0028] To this end, the present application proposes an all-in-one slurry filtering and cleaning machine, which can improve the recovery effect of filter cake and reduce filtrate loss.

[0029] For example, refer to Figure 1 and Figure 2 In some embodiments, the slurry filtering and cleaning machine includes a filter disc 110, a driving member 120, a filter tube 150 and a nozzle 210. The driving member 120 and the filter disc 110 are connected in transmission. The driving member 120 can drive the filter disc 110 to rotate so that the surface of the filter disc 110 passes through a preset immersion area, a cleaning area and a dehydration area in sequence. The immersion area is used to accommodate the slurry. The filter tube 150 is connected to the interior of the filter disc 110. The filter tube 150 is used to generate negative pressure to suck the filtrate. The nozzle 210 is arranged in the cleaning area, and the nozzle 210 is used to spray and clean the filter disc 110.

[0030] It can be understood that during operation, the filter disc 110 circulates and rotates, and the filter tube 150 generates negative pressure. In the immersion zone, the suction effect of the filter tube 150 causes the liquid in the slurry to be sucked into the filter disc 110 to generate filtrate, and the solids in the slurry adhere to the surface of the filter disc 110 to form a filter cake; in the cleaning zone, the nozzle 210 sprays cleaning liquid onto the filter cake on the surface of the filter disc 110; in the dehydration zone, the suction effect of the filter tube 150 dehydrates the filter cake, thereby separating the solid components from the slurry.

[0031] During the suction process, a portion of the liquid will adhere to and remain on the filter cake. During cleaning, on the one hand, the cleaning liquid mixes with the original liquid on the filter cake, causing the solute concentration in the liquid to decrease, promoting the solute to be further sucked into the filter disc 110, thereby reducing the amount of solute remaining on the filter cake. On the other hand, the cleaning liquid can also play a certain flushing effect, causing a portion of the liquid that has not been sucked into the filter disc 110 to separate from the filter cake, thereby further reducing the amount of solute on the filter cake. Therefore, the slurry filtering and cleaning integrated machine can reduce the crystallization phenomenon during filter cake dehydration, improve the filter cake recovery effect, and at the same time reduce the loss of filtrate.

[0032] Exemplarily, a slurry filtration and cleaning integrated machine of the present application can be used to obtain carbon dioxide in the wet carbon sequestration process, or can also be used in other scenarios where the water content of the filter cake after filtration is relatively high, which will not be elaborated here.

[0033] Optionally, in order to improve the spraying effect and minimize the impact of the cleaning liquid on the slurry, in some embodiments, the cleaning liquid can be clean water (such as municipal tap water that meets the requirements after preliminary treatment). Additionally, if the amount of the cleaning liquid used is too large, the filtration and collection efficiency of the filtrate is relatively low. Therefore, in some embodiments, the water spraying pressure of the nozzle can be controlled between 0.1 Mpa and 0.2 Mpa, so as to achieve high-efficiency cleaning with less water volume.

[0034] In addition, optionally, in some embodiments, the spraying method can also be used to achieve spray cleaning, that is, the nozzle 210 is an atomizing nozzle. On the one hand, spraying can make the cleaning liquid contact the surface of the filter disk more comprehensively, improve the uniformity of cleaning, and promote more solutes to be sucked into the filter disk 110. On the other hand, spraying can also reduce the amount of the cleaning liquid used and reduce the impact on the filtration and collection efficiency of the filtrate.

[0035] The slurry filtration and cleaning integrated machine can use multiple nozzles 210 arranged at intervals to more comprehensively cover the surface of the filter disk 110. Exemplarily, in some embodiments, referring to Figure 1 , the nozzles 210 are arranged at intervals along the rotation direction of the filter disk 110, and such an arrangement is more conducive to the absorption of solutes. Specifically, first, the nozzle 210 sprays to increase the volume of the liquid and decrease the solute concentration. Subsequently, under negative pressure suction, the liquid together with the solute is sucked into the filter disk 110, the content of the solute (such as calculated by mass) decreases while the concentration increases. Next, the next nozzle 210 sprays again to further reduce the content of the solute. Through multiple suction processes repeated by multiple nozzles 210, the absorption of solutes is fully carried out.

[0036] More specifically, in some embodiments, along the rotation direction of the filter disk 110, the nozzles 210 are arranged at intervals from the inside to the outside in the radial direction. The axial interval of the nozzles 210 can be set to 30°, and the radial interval of the nozzles 210 can be set to 20 cm.

[0037] Referring to Figure 2 , the slurry filtration and cleaning integrated machine can further include a spray pipe 220. The spray pipe 220 is externally connected to a pressure generating device, and the nozzles 210 are installed on the spray pipe 220 at intervals to achieve interval arrangement. The spray pipe 220 can be composed of multiple sections spliced together, so as to conveniently adjust the position of the nozzles 210 by changing the splicing method of the spray pipe 220.

[0038] Optionally, in some embodiments, the range of the cleaning area can be greater than or equal to 150°, thereby increasing the time ratio of the spray cleaning process and improving the effect of spray cleaning. Additionally, in some embodiments, the rotation speed of the filter disk 110 can be reduced to allow sufficient time for cleaning and dewatering of the filter cake.

[0039] Exemplarily, the rotation speed of the filter disk 110 can be adjusted from 2 r / min to 3 r / min, which is commonly used in the related art, to 0.7 r / min to 0.8 r / min.

[0040] In some embodiments, the integrated slurry filtration and cleaning machine further includes a partition 240 that separates the cleaning area and the dewatering area to prevent a large amount of cleaning liquid from flowing into the dewatering area and interfering with the normal dewatering process of the filter cake. Since there is inevitably a gap between the partition 240 and the filter disk 110, optionally, in some embodiments, a safety distance is left between the nozzle 210 and the partition 240 so that the coverage range of the nozzle 210 ( Figure 1 the range shown by the dashed line in the figure) is at a certain distance from the partition 240 to prevent the cleaning liquid sprayed by the nozzle 210 from hitting the partition 240.

[0041] To ensure the dewatering effect, optionally, in some embodiments, the range of the dewatering area can be greater than or equal to 90°.

[0042] In some embodiments, the integrated slurry filtration and cleaning machine includes a scraper 230 disposed in the dewatering area. The scraper 230 contacts the filter disk 119 to scrape off the filter cake on the filter disk 110. The specific design of the scraper 230 and how to collect the scraped filter cake can refer to the relevant prior art and will not be elaborated herein.

[0043] It should be noted that in addition to the immersion area, the cleaning area, and the dewatering area, more functional areas can be provided in the present application. For example, a backwashing area can be provided downstream of the dewatering area to remove solid particles blocked in the filter disk 110 by backwashing and improve the suction effect during the next round of filtration. The relevant design can refer to the relevant prior art and will not be elaborated herein.

[0044] In some embodiments, the integrated slurry filtration and cleaning machine includes a slurry tank 250 for accommodating slurry. The slurry tank 250 is located below the filter disk 110, and the filter disk 110 is partially located within the slurry tank 250 in the horizontal direction. The slurry tank 250 is configured to form an immersion area.

[0045] In some embodiments, the integrated slurry filtration and cleaning machine further includes a feed pipe 270 that communicates with the slurry tank 250 to convey the slurry to be filtered to the slurry tank 250. The feeding process of the feed pipe 270 can be feedback-controlled by a liquid level sensor so that the slurry is always within an appropriate height range. Additionally, a slurry discharge port can be provided at the bottom of the slurry tank 250 to discharge the last remaining slurry.

[0046] Referring to Figure 1 and Figure 2 , in some embodiments, the filter disc 110 rotates along a substantially horizontal rotating shaft, such that various parts of the filter disc 110 are cyclically immersed in and withdrawn from the slurry tank 250. The filter disc 110 can be formed by splicing multiple ceramic filter plates on both sides and an interlayer in the middle. The filtration performance of the ceramic filter plates can be specifically adjusted according to the requirements of the actual scenario. For example, ceramic filter plates with a pore size range of 0.5 μm to 10 μm can be used, specifically 0.8 μm, 2 μm, 5 μm, 10 μm, etc., which will not be elaborated here.

[0047] Optionally, in some embodiments, the driving member 120 can use a rotating motor. The driving member 120 is connected to the main shaft 130 through a coupling, thereby driving the filter disc 110 mounted on the main shaft 130 to rotate. Additionally, in some embodiments, the integrated slurry filtration and cleaning machine further includes a filter box 140. The filter box 140 is mounted on the main shaft 130, and a filtration chamber is formed by surrounding between the filter box 140 and the main shaft 130. The inside of the filter pipe 150 and the filter disc 110 are both communicated with the filtration chamber, thereby realizing the negative pressure suction function.

[0048] Of course, in addition to Figure 2 the shown transmission connection method, the driving member 120 can also be connected to the main shaft 130 in other ways, and the present application does not limit this.

[0049] In some embodiments, the integrated slurry filtration and cleaning machine includes a shield 260. The shield 260 is mounted on the slurry tank 250, and a processing chamber is formed by enclosing between the shield 260 and the slurry tank 250. The filter disc 110 and the spray head 210 are located inside the processing chamber.

[0050] Optionally, in some embodiments, the shield 260 can be made of a transparent material to facilitate observing the state of the filter cake during spray cleaning and dehydration collection, evaluating the implementation effect, and accordingly making fine adjustments to parameters such as the rotation speed and spray pressure.

[0051] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples", etc., means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0052] In some alternative embodiments, the functions / operations mentioned in the block diagrams may not occur in the order mentioned in the operation diagrams. For example, depending on the functions / operations involved, two consecutively shown blocks can actually be executed substantially simultaneously or the blocks can sometimes be executed in the reverse order. In addition, the embodiments presented and described in the flowcharts of the present application are provided by way of example for the purpose of providing a more comprehensive understanding of the technology. The disclosed methods are not limited to the operations and logical flows presented herein. Alternative embodiments are foreseeable, where the order of various operations is changed and where the sub-operations described as part of a larger operation are executed independently.

[0053] Although the embodiments of the present application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A slurry filtering and cleaning integrated machine, characterized in that: include: Filter disc; A driving member, the driving member is in driving connection with the filter disc, the driving member can drive the filter disc to rotate, so that the surface of the filter disc passes through a preset immersion area, a cleaning area and a dehydration area in sequence, the immersion area is used to accommodate slurry; A filter tube, the filter tube is connected to the interior of the filter disc, and the filter tube is used to generate negative pressure to suck the filtrate; A nozzle is arranged in the cleaning area and is used for spraying and cleaning the filter disc. The nozzle sprays cleaning liquid onto the filter cake on the surface of the filter disc.

2. The slurry filtering and cleaning integrated machine according to claim 1, characterized in that: The water spraying pressure of the nozzle is between 0.1Mpa and 0.2Mpa.

3. The slurry filtering and cleaning integrated machine according to claim 1, characterized in that: The nozzle is an atomizing nozzle, and a plurality of the nozzles are arranged at intervals.

4. The slurry filtering and cleaning integrated machine according to claim 3, characterized in that: Along the rotation direction of the filter disc, the nozzles are spaced apart from inside to outside in the radial direction, the axial spacing of the nozzles is 30°, and the radial spacing of the nozzles is 20 cm.

5. The slurry filtering and cleaning integrated machine according to claim 1, characterized in that: The range of the cleaning area is greater than or equal to 150°.

6. The slurry filtering and cleaning integrated machine according to claim 1 or 5, characterized in that: The rotation speed of the filter disc is 0.7 r / min to 0.8 r / min.

7. The slurry filtering and cleaning integrated machine according to claim 1, characterized in that: The slurry filtering and cleaning integrated machine comprises a partition plate, and the partition plate separates the cleaning area and the dehydration area.

8. The slurry filtering and cleaning integrated machine according to claim 1, characterized in that: The slurry filtering and cleaning integrated machine comprises a scraper, which is arranged in the dehydration area and contacts the filter disc to scrape off the filter cake on the filter disc.

9. The slurry filtering and cleaning integrated machine according to claim 1, characterized in that: The slurry filtering and cleaning machine comprises a slurry pool, which is used to contain slurry. The slurry pool is located below the filter disc. The filter disc is partially located in the slurry pool in the horizontal direction. The slurry pool structure forms the immersion area.

10. The slurry filtering and cleaning integrated machine according to claim 9, characterized in that: The slurry filtering and cleaning integrated machine comprises a shield, which is mounted on the slurry pool. The shield and the slurry pool are enclosed to form a processing chamber, and the filter disc and the nozzle are located in the processing chamber.

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