Liquid removal device and liquid removal method

Abstract

A liquid removal device and a liquid removal method with improved liquid removal capacity are provided. [Solution] The liquid removal device 1 includes a wire filter separator 3 and a filter cloth separator 4 provided downstream of the wire filter separator 3, and a cyclone separator 2 and a wire filter separator 5 provided upstream of the wire filter separator 3. The wire filter separator 5 provided upstream of the wire filter separator 3 is preferably a punched metal separator. The liquid removal method includes a wire filter separation step in which solid-liquid separation is performed using the wire filter separator 3, and a filter cloth separation step in which solid-liquid separation is performed using the filter cloth separator 4.

Description

[Technical Field]

[0001] The present invention relates to a liquid removal device and a liquid removal method. [Background technology]

[0002] When a slurry-like substance in which liquid and solids are mixed needs to be separated from each other, a deliquifying device is used to remove the solids and water.

[0003] For example, Patent Document 1 listed below discloses a screw press type dehydrator in which a screw having a rotating shaft with spiral blades formed thereon is provided within a cylindrical filtering surface, a slurry-like material is introduced into the filtering surface, water is discharged from the filtering surface, and the resulting material is discharged as a dehydrated cake from the bottom. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2003-88896 Summary of the Invention [Problem to be solved by the invention]

[0005] It is true that the technology described in Patent Document 1 is useful in that it can dehydrate a slurry substance. However, the technology described in Patent Document 1 still has room for improvement in terms of dehydration capacity.

[0006] Therefore, an object of the present invention is to provide a liquid removal device and a liquid removal method with improved liquid removal capabilities. [Means for solving the problem]

[0007] A liquid removal device according to one aspect of the present invention that solves the above-mentioned problems includes a wire filter separator and a filter cloth separator provided downstream of the wire filter separator.

[0008] In addition, in this respect, although not limited thereto, it is preferable to have a cyclone separator provided in the preceding stage of the wire filter separator.

[0009] In addition, in this respect, although not limited thereto, it is preferable to provide a further wire filter separator in a stage preceding the wire filter separator.

[0010] In addition, in this respect, although not limited thereto, it is preferable to provide a punched metal separator in the stage preceding the wire filter separator.

[0011] Furthermore, in this respect, although not limited thereto, it is preferable that the wire filter separator comprises a filter section having a plurality of stages of circularly wound wedge wire with gaps therebetween, and a housing section arranged around the filter section.

[0012] Furthermore, in this respect, although not limited thereto, it is preferable that the filter cloth separator comprises a bottomed filter cloth section that is open at the top, a top plate section that supports the bottomed filter cloth section, and a housing section that covers the bottomed filter cloth section.

[0013] Furthermore, a liquid removal method according to another aspect of the present invention includes a wire filter separation step of performing solid-liquid separation using a wire filter separator, and a filter cloth separation step of performing solid-liquid separation using a filter cloth separator.

[0014] In addition, in this respect, although not limited thereto, it is preferable to have a cyclone separation step in which solid-liquid separation is performed using a cyclone separator prior to the wire filter separation step. [Effects of the Invention]

[0015] As described above, the present invention can provide a liquid removal device and a liquid removal method with improved liquid removal capacity. [Brief explanation of the drawings]

[0016] [Figure 1] 1 is a diagram showing an outline of a liquid removal device according to an embodiment; [Figure 2] FIG. 2 is a diagram showing the outline of the appearance of a cyclone separator of the deliquor device according to the embodiment. [Figure 3] FIG. 2 is a schematic cross-sectional view of a cyclone separator of a deliquor device according to an embodiment. [Figure 4] FIG. 2 is a diagram showing the outline of the appearance of a small cyclone separator of the deliquor device according to the embodiment. [Figure 5] FIG. 2 is a schematic cross-sectional view of a small cyclone separator of a deliquor device according to an embodiment. [Figure 6] FIG. 2 is a schematic cross-sectional view of a wire filter separator of the liquid removal device according to the embodiment. [Figure 7] 1 is a diagram showing a schematic external view of a filter portion of a wire filter separator of a drainage device according to an embodiment. FIG. [Figure 8] 1 is a schematic cross-sectional view of a portion of a filter unit of a wire filter separator of a drainage device according to an embodiment. FIG. [Figure 9] FIG. 2 is a diagram showing an outline of a punched metal separator that can be provided before the wire filter separator of the deliquor device according to the embodiment. [Figure 10] FIG. 2 is a diagram showing an outline of a filter cloth separator of the liquid removal device according to the embodiment. [Figure 11] 2 is a diagram showing an outline of a bottomed filter cloth part of a filter cloth separator of a deliquor device according to an embodiment. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0017] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention can be embodied in many different forms and is not limited to the specific examples described in the following embodiments.

[0018] (Deliquor removal equipment) FIG. 1 is a schematic diagram of a dewatering device (hereinafter referred to as "the device") 1 according to this embodiment. As shown in this figure, the device 1 includes a wire filter separator 3 and a filter cloth separator 4 provided downstream of the wire filter separator 3. The device 1 also includes a cyclone separator 2 provided upstream of the wire filter separator 3.

[0019] According to this device 1, after solid-liquid separation is performed through the wire filter separator 3, further solid-liquid separation is performed through the filter cloth separator 4, thereby further improving the liquid removal capacity. Specifically, while separating solids and liquid from a slurry-like substance that is a mixture of solids and liquid, the solids can be further separated and classified by size, thereby achieving a high liquid removal capacity. The specific configurations and effects of these devices will be described in more detail below.

[0020] First, the present device 1 has a cyclone separator 2. The cyclone separator 2 in the present device 1 is a device that generates a swirling flow inside and can separate and classify materials based on their weight and density. By using the cyclone separator 2, it is possible to first easily remove solids and liquid (water) from the slurry-like material to be treated.

[0021] FIG. 2 is a diagram showing a schematic external view of the cyclone separator 2 used in this embodiment, and FIG. 3 is a schematic cross-sectional view thereof.

[0022] The structure of the cyclone separator 2 is not particularly limited, but it is also preferable to use a combination of multiple small cyclone separators 21, as shown in the figure. That is, while a single cyclone separator of a certain size may be used as the cyclone separator 2, it is preferable to use a group of multiple small cyclone separators 21. The above-mentioned cyclone separator 2 of a certain size and the small cyclone separator 21 can have substantially the same structure, differing only in size. Using multiple small cyclone separators 21 allows for flexible response to fluctuations in the flow rate of the material being treated, and since each unit operates independently, the overall separation efficiency can be maintained at a consistent level. Furthermore, it is easy to individually identify abnormalities such as clogging in each cyclone, making maintenance easier.

[0023] 4 is a diagram showing a schematic appearance of the small-sized cyclone separator 21, and FIG. 5 is a schematic cross-sectional view thereof. As described above, the small-sized cyclone separator 21 shown in this figure is capable of separating substances using a swirling flow, and specifically, it is preferable that the small-sized cyclone separator 21 includes a swirling chamber 211 to which an inlet 2111 is connected and which is provided with a lower outlet 2112 and an upper outlet 2113. This makes it possible to separate solids and liquids. Specifically, separated liquid components such as water are discharged from the upper outlet 2113, and solid components such as particles and mud in the separated slurry are discharged from the lower outlet 2112.

[0024] Furthermore, when a plurality of small cyclone separators 21 are combined as described above, it is preferable that they are configured with a fixture 22 for collectively fixing them together and a housing 23 for entirely covering the plurality of small cyclone separators 21. In this case, it is also preferable that the housing 23 be further provided with an inlet 231 for introducing slurry, which is the material to be treated, and an outlet for discharging liquid components (e.g., moisture) discharged from the upper outlets 2113 of the plurality of small cyclone separators 21. Of course, it is preferable that piping is connected inside the inlet 231 for connecting to the inlets 2111 of each small cyclone separator 21. The liquid components discharged from the outlets 232 of the lower outlets 2112 will enter the wire filter separator 3 in the next stage.

[0025] The present device 1 also has a wire filter separator 3. The wire filter separator 3 in the present device 1 is formed by winding a wire with gaps therebetween or by stacking a plurality of annular rings with gaps therebetween, and by using these gaps for separation, the material to be treated can be separated based on the size of the gaps.

[0026] FIG. 6 shows a schematic cross-section of the wire filter separator 3 of the present device 1. The wire filter separator 3 shown in this figure is not limited as long as it has the above-described functions. For example, it is preferable that the wire filter separator 3 includes a filter section 31 having a circularly wound wedge wire 311 arranged in multiple stages with gaps between them, and a housing section 32 arranged around the filter section 31. By winding the wedge wire 311 in a circular shape, a structure with excellent strength and durability can be achieved. By precisely controlling the gaps, stable separation performance according to the particle size of the target solids can be achieved. Furthermore, forming multiple gaps increases the path through which the processing fluid passes, allowing for more reliable capture of solids, thereby contributing to improved filtration efficiency. Furthermore, the housing section 32 properly supports the filter section 31, ensuring the integrity of the entire structure and providing the advantage of maintaining stable filtration performance even against pressure fluctuations and fluid shocks.

[0027] Fig. 7 is a diagram showing the appearance of the filter section 31 in the wire filter separator 3 of the present device 1, and Fig. 8 is a diagram showing a cross section of a portion thereof. As described above, the filter section 31 is configured with multiple stages of circularly wound wedge wires 311 arranged with gaps between them. These multiple wedge wires 311 are fixed by supports 312, and the gaps between them are maintained constant.

[0028] The wedge wire 311 has a generally triangular cross section, with one side aligned linearly with a gap between them, forming a cylindrical, smooth side surface. This smooth side faces the inner periphery of the filter section 31, which serves as the inlet surface for the processing fluid, i.e., the filter surface. The processing fluid flows from the inside to the outside of the filter section 31, with only the liquid components passing through the gap, while the solids are retained on the inner periphery. This configuration suppresses the adhesion and accumulation of solids, reducing clogging and allowing the fluid to pass smoothly. Furthermore, the apex of the triangle is located on the outer periphery, creating a structure in which the gap expands in the flow direction, improving the drainage of separated liquid and the cleanability of the filter. By making the inner surface the filter surface, both filtration efficiency and maintainability can be achieved. While the inner surface is designated as the filter surface here, the opposite, i.e., the outer surface, may also be designated as the filter surface.

[0029] The size of the gap is not particularly limited, but is preferably in the range of 20 μm to 80 μm, more preferably 40 μm to 60 μm. By setting the size in this range, it is possible to ensure a certain degree of separation performance while suppressing clogging.

[0030] Furthermore, the wire filter separator 3 of the present device 1 is preferably configured so that the material to be treated is introduced from the inside and the separated liquid and solids are discharged to the outside. That is, the inner circumferential side of the filter section 31 is preferably the filter surface, and the flow path is configured so that the treated fluid passes from the inside to the outside. This configuration has the advantage that the filter surface (the flat surface of the smooth wedge wire) is formed on the inside, allowing the treated fluid to flow smoothly, thereby suppressing the accumulation and adhesion of solids. Furthermore, concentrating the material to be filtered inside the filter has the advantage of ease of maintenance, as it simplifies cleaning and maintenance work. Furthermore, since the treated fluid flows uniformly along the cylindrical inner wall, the filtration load is evenly distributed throughout the entire filter, preventing clogging due to concentration in one area. This internal inflow configuration is extremely effective in terms of filtration performance, stability, and maintainability.

[0031] Furthermore, in the present device 1, it is preferable to provide another wire filter separator 5 in a stage preceding the wire filter separator 3. That is, it is preferable to provide multiple stages of filter separators. By doing so, since clogging occurs when trying to remove fine-sized solids all at once, the wire filter capacity can be differentiated in stages, thereby achieving high separation performance while suppressing clogging. That is, the wire filter separator in the preceding stage and the wire filter separator in the following stage can have the same configuration, but it is preferable that the wire filter separator in the preceding stage has a larger gap and the wire filter separator in the following stage (the above-mentioned wire filter separator 3) has a smaller gap. From this perspective, when the spacing between the wire filter separators in the following stage is in the range of 20 μm to 80 μm, it is preferable that the spacing between the wire filter separators 5 in the preceding stage is larger than that of the wire filter separators in the following stage, specifically in the range of 60 μm to 1 mm.

[0032] While the configuration shown here is one in which another wire filter separator 5 is provided upstream of the wire filter separator 3, a punched metal separator may also be provided upstream of the wire filter separator. An image of this configuration is shown in Figure 9. A punched metal separator is a cylindrical metal plate with multiple small holes drilled into it, and the size of these small holes functions as a filter. The wire filter separator 3 is capable of separating solids through very narrow gaps, and because this punched metal has a very simple structure, providing it upstream of the wire filter separator 3 can be a very advantageous configuration in terms of cost.

[0033] The present device 1 also includes a filter cloth separator 4 provided downstream of the wire filter separator 3. While the present device 1 can remove solids of a certain size using the wire filter separator 3, there remains solids of a size that cannot be removed even by the wire filter separator 3. Therefore, by providing the filter cloth separator 4 downstream of the wire filter separator 3 in the present device 1, it is possible to more reliably remove the liquid.

[0034] The structure of the filter cloth separator 4 in the present device 1 is not limited as long as it has the above-mentioned functions, but it is preferable that it comprises a bottomed filter cloth part 41 that is open at the top, a top plate part 42 that supports the bottomed filter cloth part 41, and a housing part 44 that covers the bottomed filter cloth part 41. An example of this case is shown in Figure 10.

[0035] The bottomed filter cloth section 41 of the filter cloth separator 4 is a member formed of a bottomed filter cloth that is open at the top, and this allows the material to be fed from the top and the solid content to be completely removed by the filter cloth.

[0036] The filter cloth has a fine fiber structure that allows for high filtration accuracy, effectively capturing even the smallest particles that would pass through a wire filter. In particular, the bottomed configuration allows the added slurry to remain inside, reducing the flow rate and dispersing it over the entire filtering surface, improving filtration efficiency and preventing excessive load from concentrating on one part of the filter cloth. Furthermore, the filter cloth is easy to replace, and cleaning and maintenance work after use can be easily performed, contributing to more efficient operation management and continued stable operation.

[0037] The separation capacity of the bottomed filter cloth part 41 in this device is not limited, but it is preferable that it is higher than the separation capacity of the wire filter separator 3. Specifically, the air permeability is 3 cm 3 / cm 2 / sec or more 15cm 3 / cm 2 This has the advantage that clogging can be prevented by sharing the capacity with the wire filter separator 3, thereby enabling more efficient separation and classification.

[0038] Although it is important that the bottomed filter cloth part 41 is made of cloth, there is a risk that the bottomed filter cloth part 41 itself will stick together when a vacuum is created inside the housing part 43, as will be described later. Therefore, it is preferable to fix it to a wire mesh or the like to maintain its shape. An image of this case is shown in Figure 11.

[0039] Furthermore, a lower pipe 431, which is mainly used to collect and discharge the discharged liquid, is connected to the lower part of the casing 43, and an upper pipe 432, which is used to create a vacuum inside the casing 43, is connected to the upper part of the casing 43, and these are connected via a compressor 433. By providing the compressor 433, it is possible to create a vacuum inside the casing 43 and perform efficient filtration by the filter cloth.

[0040] As described above, the device 1 can provide a liquid removal device and a liquid removal method with improved liquid removal capabilities.

[0041] (Deliquoring method) As is clear from the above description of the present device 1, a liquid removal method can be provided by using the present device 1. Specifically, the liquid removal method according to this embodiment (hereinafter referred to as "the present method") includes (S1) a wire filter separation step of performing solid-liquid separation using a wire filter separator, and (S2) a filter cloth separation step of performing solid-liquid separation using a filter cloth separator.

[0042] Furthermore, as described above, the present apparatus 1 is provided with the cyclone separator 2 in the stage preceding the wire filter separator 3, and therefore it is preferable to have a cyclone separation step (S0) in which solid-liquid separation is performed using a cyclone separator in the stage preceding the wire filter separation step (S1) in the present method.

[0043] As described above, this method is a liquid removal method with improved liquid removal capacity. [Industrial Applicability]

[0044] The present invention has industrial applicability as a deliquification device and a deliquification method. [Explanation of symbols]

[0045] 1... Deliquor removal equipment 2. Cyclone separator 21. Small cyclone separator 211...Turning room 2111...Inlet 2112...Lower outlet 2113...Top outlet 22...fixture 23....Housing 231···Inlet 232...Discharge port 3. Wire filter separator 31 Filter section 311···Wedge wire 312...post 32 Housing 4...filter cloth separator 41...bottomed filter cloth section 42 Top plate 43 Housing 431 Lower piping 432···Upper piping 433···Compressor 5. Wire filter separator

Claims

1. A cyclone separator that generates a swirling flow inside to perform solid-liquid separation on a material to be treated; a first wire filter separator that performs solid-liquid separation on the material to be treated discharged from the cyclone separator; a second wire filter separator provided downstream of the first wire filter separator and configured to perform solid-liquid separation on the material to be treated discharged by the first wire filter separator; A deliquor device comprising: a filter cloth separator provided downstream of the second wire filter separator and performing solid-liquid separation on the material to be treated discharged by the second wire filter separator; The first wire filter separator and the second wire filter separator each include a filter section in which a circularly wound wedge wire is arranged in multiple stages with gaps between them, and a housing section that is arranged around the filter section, and the spacing between the wedge wires of the first wire filter separator is larger than the spacing between the wedge wires of the second wire filter separator, The filter cloth separator is a liquid removal device that includes a bottomed filter cloth portion that is open at the top, a top plate portion that supports the bottomed filter cloth portion, and a housing portion that covers the bottomed filter cloth portion.

2. A cyclone separation step in which solid-liquid separation is performed on the material to be treated using a cyclone separator; a wire filter separation step in which, after the cyclone separation step, a first wire filter separator performs solid-liquid separation on the material to be treated discharged from the cyclone separator, and then a second wire filter separator provided downstream of the first wire filter separator performs solid-liquid separation on the material to be treated discharged from the first wire filter separator; A deliquification method comprising a filter cloth separation step of performing solid-liquid separation on the material to be treated discharged from the second wire filter separator using a filter cloth separator after the wire filter separation step, The first wire filter separator and the second wire filter separator both comprise a filter section in which circularly wound wedge wires are arranged in multiple stages with gaps between them, and a housing section arranged around the filter section, and the spacing between the wedge wires of the first wire filter separator is greater than the spacing between the wedge wires of the second wire filter separator, and the dehydration method is performed using a dehydration device in which the filter cloth separator comprises a bottomed filter cloth section that is open at the top, a top plate section that supports the bottomed filter cloth section, and a housing section that covers the bottomed filter cloth section.

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