Closed two-stage filtration integrated device

Abstract

The utility model discloses a closed two-stage filtration integrated device, which comprises: a box body, the box body is provided with a feed inlet, a liquid outlet and a first discharge port; the first-stage filtering assembly is arranged in the box body and comprises a plurality of grid bars which are horizontally arranged and a rake tooth plate which is movably arranged above the grid bars, the grid bars are fixedly arranged in the box body and located between the feeding opening and the first discharging opening, and the rake tooth plate is provided with a plurality of first rake teeth which are used for stretching into gaps of the grid bars; the height of the feeding hole is higher than that of the grid bars; the second-stage filtering assembly is partially arranged in the box body, and the second-stage filtering assembly is located between the first-stage filtering assembly and the liquid outlet; the secondary filter assembly comprises a rack and a filter plate, and the aperture or gap of the filter plate is smaller than the gap of the grid bar; the rack is obliquely arranged and fixedly connected with the box body, and a second discharging opening is formed in the position, close to the top, of the rack; the filter plate is rotationally connected to the rack. The closed two-stage filtration integrated device has the advantage of small filtration resistance, and can optimize the filtration effect.

Description

Technical Field

[0001] This specification relates to the technical field of sewage treatment, and in particular to a closed two-stage integrated filtration device. Background Art

[0002] In the fields of urban fecal sewage slurry treatment, restaurant kitchen waste slurry treatment, and other organic waste treatment fields or other treatment fields containing mixed slurries, because the sewage slurry contains a large amount of various garbage impurities and other faulty substances, it is usually necessary to pretreat the sewage slurry, that is, to fully filter it to remove various garbage impurities, that is, faulty substances in the slurry, so as to ensure that the operation of the subsequent process treatment stage of the sewage slurry is not interfered with by the garbage faulty substances, and to ensure the normal operation of the treatment system.

[0003] Screens are commonly used for slurry pretreatment. Commonly used screens include tilted rake-tooth screens. These typically require channel-mounted installation and are difficult to install at a high height. They are also inconvenient to install in locations with limited space, difficult to maintain, and difficult to integrate into mobile skid-mounted systems. Furthermore, screens are difficult to seal and operate, making them inefficient for deodorization. Furthermore, tilted screens create high filtration resistance and low filtration efficiency due to the liquid level difference between the front and back of the screen during sewage slurry filtration. Utility Model Content

[0004] In view of the shortcomings of the existing technology, one purpose of this specification is to provide a closed two-stage integrated filtration device, which not only has the advantage of low filtration resistance but also optimizes the filtration effect.

[0005] To achieve the above objectives, the embodiments of this specification provide a closed two-stage integrated filtration device, comprising:

[0006] A box body, wherein the box body is provided with a feed inlet, a liquid discharge outlet, and a first discharge outlet;

[0007] a first-stage filter assembly arranged in the box body, the first-stage filter assembly comprising a plurality of horizontally arranged bars, and a rake tooth plate movably arranged above the bars, the bars being fixedly arranged in the box body and being located between the feed port and the first discharge port, the rake tooth plate being provided with a plurality of first rake teeth for extending into the gaps between the bars, the rake tooth plate cooperating with the bars moving in a direction from the feed port to the first discharge port; the height of the feed port being higher than the height of the bars, and the height of the drain port being lower than the height of the bars;

[0008] A secondary filter assembly is partially arranged in the box body, and the secondary filter assembly is located between the primary filter assembly and the drain port; the secondary filter assembly includes a frame and a filter plate, and the aperture or gap of the filter plate is smaller than the gap of the bars; the frame is tilted and fixedly connected to the box body, and a second discharge port is provided near the top of the frame; the filter plate is rotatably connected to the frame, and is used to transport the screen residue to the top of the frame and then discharge it through the second discharge port.

[0009] As a preferred embodiment, the bars extend along a first direction, and a plurality of the bars are spaced apart in a second direction, and the first direction and the second direction are both parallel to the horizontal plane and perpendicular to each other; a plurality of the first rake teeth are spaced apart in the second direction; the feed port and the first discharge port are respectively located on both sides of the bars in the first direction; in the first direction, the feed port, the first-stage filter assembly, the second-stage filter assembly and the drain port are arranged in sequence.

[0010] As a preferred embodiment, two groups of first rotating components are provided in the box body, and the two groups of first rotating components are spaced apart in the second direction and are arranged on the inner wall surface of the box body; the first rotating component includes a driving sprocket, a driven sprocket, and a first chain sleeved outside the driving sprocket and the driven sprocket, and the first chain is located above the grid bar; the driving sprocket and the driven sprocket are spaced apart in the first direction; the rake tooth plate is fixedly connected to the first chains of the two groups of first rotating components on both sides of the second direction; the driving sprocket is connected to a first driving member, and the first driving member is used to drive the driving sprocket to rotate, so that the moving direction of the rake tooth plate matched with the grid bar is from the feed port to the first discharge port.

[0011] As a preferred embodiment, the first-stage filter assembly also includes a slag-blocking rake arranged above the first discharge port, the slag-blocking rake is located above the first chain, and the slag-blocking rake is provided with a plurality of second rake teeth on the side facing the first chain, and the plurality of second rake teeth are spaced apart in the second direction, and the second rake teeth are used to extend into the gap between adjacent first rake teeth.

[0012] As a preferred embodiment, two groups of second rotating components are provided in the frame, and the two groups of second rotating components are spaced apart in the second direction and are arranged on the inner wall surface of the frame; the second rotating component includes a second chain and a second driving member, and the filter plate is fixedly connected to the second chains of the two groups of second rotating components on both sides in the second direction, and the second driving member is used to drive the second chain to drive the filter plate to rotate.

[0013] As a preferred embodiment, the frame includes a first part and a second part that are connected, the second part is located above the first part, and the bottom of the first part is fixedly connected to the bottom surface of the box body; the angle between the first part and the horizontal plane is smaller than the angle between the second part and the horizontal plane; part of the second part extends out of the box body, and the second part extending out of the box body is sealed; the second discharge port is arranged at the part close to the top of the second part and is located on the side of the second part away from the first-stage filter assembly.

[0014] As a preferred embodiment, the secondary filter assembly also includes a brush arranged above the second discharge port for cleaning the residue on the filter plate; the brush is connected to a third drive member, and the third drive member is used to drive the brush to rotate.

[0015] As a preferred embodiment, the rake plate rotates counterclockwise, the filter plate rotates clockwise, and the brush rotates counterclockwise.

[0016] As a preferred embodiment, the gap between the bars is 10 mm to 25 mm.

[0017] As a preferred embodiment, the filter plate is a circular hole plate, and the pore size of the circular hole plate is 2mm~8mm. Beneficial effects

[0018] The enclosed, integrated two-stage filtration device provided in this embodiment has all its components integrated into a housing, creating an integrated setup. This allows for quick and easy installation of the housing where slurry filtration is required, instantly activating the enclosed, integrated two-stage filtration device. The housing structure eliminates the need for channel installation, making it extremely convenient to use and install. It is also suitable for system integration with other equipment on a skid-mounted structure.

[0019] The bars of the first-stage filter assembly are installed horizontally, eliminating the resistance of the liquid level difference between the front and back of the bars that is typically encountered with tilted grilles. This results in low filtration resistance, fast filtration speed, and high filtration efficiency, making it suitable for rapid discharge of the slurry to be filtered from the front end. While the first-stage filter assembly can remove coarse debris from the slurry or sewage, many debris components with particle sizes smaller than the bar gaps can pass through the bars and enter the lower part of the chamber. Alternatively, long, strips of debris, such as fibers, that are not intercepted by the first-stage filter assembly may remain in the slurry or sewage, requiring further removal through the installation of a second-stage filter assembly.

[0020] Although the frame of the secondary filter assembly is set at an angle, because the slurry has been filtered by the primary filter assembly, its solid impurity content is significantly reduced, and therefore it does not cause excessive resistance to the secondary filter assembly. The use of a two-stage filter assembly can optimize the filtering effect and maximize the removal of solid impurities in the slurry.

[0021] With reference to the following description and drawings, specific embodiments of the present invention are disclosed in detail, indicating the manner in which the principles of the present invention can be employed. It should be understood that the scope of the embodiments of the present invention is not limited thereby.

[0022] Features described and / or illustrated with respect to one embodiment may be used in the same or similar manner in one or more other embodiments, combined with features in other embodiments, or substituted for features in other embodiments.

[0023] It should be emphasized that the term "include / comprising" when used herein refers to the presence of features, integers, steps or components, but does not exclude the presence or addition of one or more other features, integers, steps or components. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative labor.

[0025] Figure 1 This is a schematic structural diagram of a closed two-stage integrated filtration device provided in this embodiment;

[0026] Figure 2 This is a partially enlarged structural diagram of a grid bar and a bracket provided in this embodiment;

[0027] Figure 3 Schematic diagram of the structure when the rake teeth plate and the bars on the bracket face each other in this embodiment;

[0028] Figure 4 A schematic cross-sectional view of a grid bar provided in this embodiment;

[0029] Figure 5 This is an enlarged structural diagram of the rake plate and the slag-blocking rake facing each other in this embodiment (the distance between the rake plate and the slag-blocking rake is enlarged for clarity);

[0030] Figure 6 This is a schematic structural diagram of a filter plate provided in this embodiment.

[0031] Description of reference numerals:

[0032] 1. Box body; 11. Feed inlet; 12. Drain outlet; 13. First discharge outlet;

[0033] 2. Primary filter assembly; 21. Bars; 211. Upper portion; 212. Middle portion; 213. Lower portion; 22. Rake plate; 221. First rake tooth; 23. Drive sprocket; 24. Driven sprocket; 25. First chain; 26. First drive member; 27. Slag stopper; 271. Second rake tooth; 28. Bracket;

[0034] 3. Secondary filter assembly; 31. Frame; 311. First part; 312. Second part; 32. Second discharge port; 33. Filter plate; 34. Second drive member; 35. Brush; 36. Third drive member;

[0035] 4. Flushing port; 5. Odor treatment port; 6. Inspection port; 7. Support legs; 8. Baffle; 9. Press; 10. Working surface;

[0036] X, first direction; Y, second direction; Z, vertical direction. DETAILED DESCRIPTION

[0037] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the following will be combined with the drawings of the embodiments of the present invention to clearly and completely describe the technical solutions of the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0038] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be another element centered thereon. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be another element centered thereon. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of this invention are intended only to describe specific embodiments and are not intended to limit this invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0040] See also Figures 1 to 6 The embodiment of the present application provides a closed two-stage integrated filtering device, comprising: a housing 1 , a primary filtering assembly 2 disposed in the housing 1 , and a secondary filtering assembly 3 partially disposed in the housing 1 .

[0041] like Figure 1 As shown, the housing 1 is equipped with an inlet 11, a drain port 12, and a first outlet 13. The inlet 11 is used to introduce the slurry to be filtered into the housing 1. The first outlet 13 is used to discharge solid impurities filtered by the primary filter assembly 2. The drain port 12 is used to discharge the liquid filtered by the primary filter assembly 2 and the secondary filter assembly 3. The housing 1 adopts a fully enclosed structure, which helps prevent odor leakage and facilitates operation observation and maintenance of the device.

[0042] The primary filter assembly 2 includes a plurality of horizontally arranged bars 21 and a rake plate 22 movably arranged above the bars 21. The bars 21 are fixedly arranged in the housing 1 and are located between the feed port 11 and the first discharge port 13. The rake plate 22 is provided with a plurality of first rake teeth 221 for extending into the gaps between the bars 21. The rake plate 22, which cooperates with the bars 21, moves in the direction from the feed port 11 to the first discharge port 13. The height of the feed port 11 is higher than the height of the bars 21, and the height of the discharge port 12 is lower than the height of the bars 21.

[0043] The secondary filter assembly 3 is located between the primary filter assembly 2 and the drain port 12. The secondary filter assembly 3 includes a frame 31 and a filter plate 33. The aperture or gap of the filter plate 33 is smaller than the gap between the bars 21. Therefore, the secondary filter assembly 3 can further perform a secondary filtration on the product filtered by the primary filter assembly 2. The frame 31 is tilted and fixedly connected to the housing 1. A second discharge port 32 is provided near the top of the frame 31 for discharging solid impurities filtered out by the secondary filter assembly 3. The filter plate 33 is rotatably connected to the frame 31 for transporting the screen residue to the top of the frame 31 and discharging it through the second discharge port 32.

[0044] The enclosed, integrated two-stage filtration device provided in this embodiment has all its components integrated into a housing 1, creating an integrated setup. This allows for quick and easy installation of the housing 1 wherever slurry filtration is required, instantly activating the enclosed, integrated two-stage filtration device. The housing 1 structure eliminates the need for channel installation, making it extremely convenient to use and install. It is also suitable for system integration with other equipment on a skid-mounted structure.

[0045] The bars 21 of the primary filter assembly 2 are installed horizontally, eliminating the resistance of the liquid level difference between the front and rear of the bars, as is typically the case with tilted grates. This results in low filtration resistance, fast filtration speed, and high filtration efficiency, making it suitable for rapid discharge of the front-end slurry to be filtered. While the primary filter assembly 2 can remove coarse waste matter from the slurry or sewage, many debris components with particle sizes smaller than the gaps between the bars 21 may pass through the bars 21 and enter the lower portion of the housing 1. Alternatively, long, strip-shaped debris such as fibers that are not intercepted by the primary filter assembly 2 may remain in the slurry or sewage, requiring further removal by the secondary filter assembly 3.

[0046] Although the frame 31 of the secondary filter component 3 is set at an angle, because the slurry has been filtered by the primary filter component 2, its solid impurity content is significantly reduced, and therefore it does not cause excessive resistance to the secondary filter component 3. The use of a two-stage filter component can optimize the filtering effect and maximize the removal of solid impurities in the slurry.

[0047] like Figure 1 and Figure 2 As shown, the bars 21 extend along a first direction X, and multiple bars 21 are spaced apart in a second direction Y. The first direction X and the second direction Y are both parallel to the horizontal plane and perpendicular to each other, that is, the first direction X and the second direction Y are both perpendicular to the vertical direction Z. The feed port 11 and the first discharge port 13 are located on either side of the bars 21 in the first direction X. In the first direction X, the feed port 11, the primary filter assembly 2, the secondary filter assembly 3, and the drain port 12 are arranged in sequence.

[0048] Among them, the bars 21 are installed horizontally, which can reduce the installation height of the device to a minimum, and according to the amount of slurry processing, the lateral size and longitudinal size (that is, the size of the bars 21 in the first direction X and the size in the second direction Y) of the filtering surface (that is, the area of ​​the multiple bars 21) can be flexibly designed without affecting the overall height of the device. That is, the filtering area can be increased as needed without changing the height direction, which has great flexibility.

[0049] In this embodiment, two groups of first rotating assemblies for supporting the rake plate 22 are provided in the box body 1. The two groups of first rotating assemblies are spaced apart in the second direction Y and are arranged on the inner wall surface of the box body 1. The first rotating assembly includes a driving sprocket 23, a driven sprocket 24, and a first chain 25 sleeved outside the driving sprocket 23 and the driven sprocket 24. The first chain 25 is located above the grid bar 21. The driving sprocket 23 and the driven sprocket 24 are spaced apart in the first direction X. The rake plate 22 is fixedly connected to the first chains 25 of the two groups of first rotating assemblies on both sides in the second direction Y. The driving sprocket 23 is connected to a first driving member 26, and the first driving member 26 is used to drive the driving sprocket 23 to rotate so that the moving direction of the rake plate 22 matched with the grid bar 21 is from the feed port 11 to the first discharge port 13. That is, the first driving member 26 drives the driving sprocket 23 to rotate counterclockwise, so that the driven sprocket 24 and the first chain 25 both rotate counterclockwise (that is, in Figure 1 In the embodiment, the first chain 25 located below the driven sprocket 24 moves from left to right), and then the multiple rake plates 22 fixedly connected to the first chain 25 also rotate counterclockwise to clean the solid impurities on the grid bars 21 to the first discharge port 13.

[0050] Specifically, the plurality of first rake teeth 221 are spaced apart and distributed in the second direction Y. Figure 3 As shown, the first rake teeth 221 extend into the gaps between adjacent bars 21, so that when the first chain 25 drives the rake tooth plate 22 to move from left to right, the first rake teeth 221 can push the solids on and between the bars 21 toward the first discharge port 13, and finally discharge them from the first discharge port 13.

[0051] The first-stage filter assembly 2 of this closed, integrated two-stage filtration device utilizes fixed bars 21 for filtration and rake plates 22 for batch slag removal. This reduces the number of working parts and ensures more stable operation. The number of rake plates 22 can be flexibly adjusted based on the sewage's characteristics, i.e., the amount of slag contained. For high slag loads, the number of rake plates 22 can be increased, while for low slag loads, the number can be reduced.

[0052] In this embodiment, if Figures 1 to 3 As shown, a bracket 28 extending along the second direction Y is fixedly provided in the box 1, and the bars 21 are fixedly connected to the bracket 28. The number of brackets 28 is preferably three. In the first direction X, two brackets 28 are close to the ends of the bars 21, and one bracket 28 is close to the middle position of the bars 21.

[0053] like Figure 4 As shown, in the vertical direction Z, the width of the bars 21 gradually increases from the two ends to the middle, or the gap between adjacent bars 21 gradually decreases from the two ends to the middle. In other words, the cross section of the bars 21 is roughly diamond-shaped. The width in this embodiment refers to the dimension in the second direction Y.

[0054] In a preferred embodiment, the cross section of the grid bar 21 includes an upper portion 211 whose width gradually increases from top to bottom, a middle portion 212 whose width remains constant, and a lower portion 213 whose width gradually decreases from top to bottom. Figure 4 The dotted lines in FIG. 2 are for illustration only and have no practical significance. The upper portion 211 and the lower portion 213 are symmetrically arranged with respect to the middle portion 212 .

[0055] In this embodiment, regarding the gaps between adjacent bars 21, the gaps between the upper parts 211 are roughly in the shape of a positive V, and the gaps between the lower parts 213 are roughly in the shape of an inverted V. The filtered liquid flows down through the positive V-shaped gap and the inverted V-shaped gap in turn, which can speed up the flow rate of the filtered liquid, so that the bar net formed by the combination of the bars 21 has a large flow rate and smaller filtration resistance, and faulty materials such as stones are not easily stuck in the gaps of the bars 21, so the slag cleaning resistance is small, thereby ensuring the efficient operation of the device.

[0056] In this embodiment, the gaps between adjacent bars 21 are set to 10 mm to 25 mm to ensure sufficient thickness for the first tines 221 inserted into the gaps between bars 21. This ensures the strength of the first tines 221, allows for smooth slag removal, and provides a certain degree of filtration effectiveness. The primary filter assembly 2 is used to remove coarse waste matter from slurry or sewage. The structure of horizontal bars 21 and tine plates 22 enables rapid filtration and slag removal. Therefore, the gaps between bars 21 can be set to a larger size, depending on the material characteristics.

[0057] Preferably, the primary filter assembly 2 further comprises a slag-blocking rake 27 disposed above the first discharge port 13. The slag-blocking rake 27 is located above the first chain 25. Figure 5 As shown, the slag-blocking rake 27 is provided with a plurality of second rake teeth 271 on a side facing the first chain 25 , and the plurality of second rake teeth 271 are spaced apart in the second direction Y. The second rake teeth 271 are configured to extend into the gaps between adjacent first rake teeth 221 , thereby efficiently cleaning the residual grating residue on the rake plate 22 .

[0058] Specifically, driven by the driving sprocket 23, when the rake plate 22 rotates counterclockwise with the first chain 25 to above the first discharge port 13, the second rake teeth 271 arranged above can extend into the gap of the first rake teeth 221, so that the residual grating residue on the rake plate 22 can be efficiently cleaned.

[0059] like Figure 1As shown, the side of the slag-blocking rake 27 away from the first chain 25 is rotatably connected to the box body 1. Specifically, the two ends of the side of the slag-blocking rake 27 away from the first chain 25 along the second direction Y are rotatably connected to the box body 1. A limiting member (not shown) for limiting the position of the slag-blocking rake 27 is fixedly provided in the box body 1, so that the slag-blocking rake 27 is tilted toward the first chain 25. There are two limiting members, one is located below the connection between the slag-blocking rake 27 and the box body 1, and the other is located above the connection between the slag-blocking rake 27 and the box body 1. The slag-blocking rake 27 can rotate between the two limiting members. The movable slag-blocking rake 27 can be used to reversely clean the slag on the first rake teeth 221, so that the first rake teeth 221 remain clean.

[0060] In this embodiment, two sets of second rotating assemblies are provided within the frame 31 to support the filter plates 33. These sets are spaced apart in the second direction Y and are disposed on the inner wall of the frame 31. The second rotating assemblies can employ a similar structure to the first rotating assembly. The second rotating assemblies include a second chain (not shown) and a second drive member 34. The filter plates 33 are fixedly connected to the second chains of the two sets of second rotating assemblies on either side of the second direction Y. The second drive member 34 drives the second chain, which in turn rotates the filter plates 33. This allows the filter plates 33 to transport the screenings to the top of the frame 31 for discharge through the second discharge port 32.

[0061] Specifically, the frame 31 includes a first portion 311 and a second portion 312 connected to each other. The second portion 312 is located above the first portion 311, and the bottom of the first portion 311 is fixedly connected to the bottom surface of the housing 1. The angle between the first portion 311 and the horizontal plane is smaller than the angle between the second portion 312 and the horizontal plane, thereby further increasing the filtration area of ​​the secondary filter assembly 3 and more effectively intercepting the screening residue. Part of the second portion 312 extends outside the housing 1, and the second portion 312 extending outside the housing 1 is sealed to ensure that odors are not leaked. The second discharge port 32 is located near the top of the second portion 312 and is located on the side of the second portion 312 facing away from the primary filter assembly 2.

[0062] like Figure 1 As shown, the secondary filter assembly 3 further includes a brush 35 disposed above the second discharge port 32 for cleaning the screenings on the filter plate 33. The brush 35 is connected to a third drive member 36, which is used to drive the brush 35 to rotate. Specifically, as the filter plate 33 rotates clockwise, the brush 35 rotates counterclockwise, effectively removing the screenings from the filter plate 33.

[0063] like Figure 6As shown, to improve the removal efficiency of fine screen residue in slurry or sewage, the filter plate 33 is preferably a circular perforated plate. To achieve good filtration results, the pore size of the circular perforated plate can be set to 2 mm to 8 mm as needed. Of course, the filter plate 33 of the secondary filter assembly 3 can also use bars 21 or other types of grids with smaller filter gaps. However, considering filtration efficiency, the filter plate 33 is preferably a circular perforated plate.

[0064] In this embodiment, the box body 1 may be provided with one or more flushing ports 4. The flushing ports 4 may be located above the bars 21, and the number of flushing ports 4 may be set as needed. The large flushing surface ensures efficient cleaning of the retained filter residue, thereby reducing the organic matter content of the discharged residue and improving the sanitation level.

[0065] Specifically, a baffle 8 is provided at the corresponding position of the feed port 11 in the box body 1 to prevent impact. Figure 1 As shown, the closed dual-stage filtration integrated device further comprises a plurality of legs 7 for supporting the box body 1 on a work surface 10. An odor treatment port 5 is provided on the top surface of the box body 1, and an inspection port 6 is provided on the side surface of the box body 1.

[0066] like Figure 1 As shown, in a specific application scenario, the slurry to be processed (solid-liquid mixture) enters the box 1 from the feed port 11, and the slurry filtered by the primary filter component 2 flows downward from the gap between the bars 21, and is filtered by the secondary filter component 3, and is finally discharged from the drain port 12; the solids filtered by the primary filter component 2 remain on the bars 21, and the rake plate 22 is driven to move by the first chain 25, pushing the solids on the bars 21 to the first discharge port 13 for discharge; the solids filtered by the secondary filter component 3 remain on the filter plate 33, and the filter plate 33 is driven to move by the second chain, transporting the screen residue to the second discharge port 32 for discharge. Figure 5 In order to illustrate clearly, the distance between the rake plate 22 and the slag harrow 27 is enlarged. In actual operation, the first rake teeth 221 and the second rake teeth 271 are engaged. The solid discharged from the first discharge port 13 can be sent to the press 9 for subsequent processing.

[0067] It should be noted that, in the description of this specification, the terms "first," "second," etc., are used solely for descriptive purposes and to distinguish similar objects. There is no order of precedence between the two, nor should they be understood to indicate or imply relative importance. Furthermore, in the description of this specification, unless otherwise specified, "plurality" means two or more.

[0068] Any numerical value cited herein includes all values ​​of the lower and upper values ​​in increments of one unit from the lower value to the upper value, provided that there is at least a two-unit interval between any lower value and any higher value. For example, if the value of a component quantity or process variable (e.g., temperature, pressure, time, etc.) is stated to be from 1 to 90, preferably from 20 to 80, and more preferably from 30 to 70, it is intended to illustrate that values ​​such as 15 to 85, 22 to 68, 43 to 51, 30 to 32, etc. are also explicitly listed in this specification. For values ​​less than 1, one unit is appropriately considered to be 0.0001, 0.001, 0.01, 0.1. These are merely examples intended to be clearly stated, and it is to be understood that all possible combinations of the values ​​listed between the minimum and maximum values ​​are explicitly stated in this specification in a similar manner.

[0069] Unless otherwise indicated, all ranges include the endpoints and all numbers between the endpoints. When used with a range, "about" or "approximately" applies to both endpoints of the range. Thus, "about 20 to 30" is intended to cover "about 20 to about 30," including at least the specified endpoints.

[0070] All articles and references disclosed herein, including patent applications and publications, are incorporated herein by reference for all purposes. The term "consisting essentially of..." when describing a combination should include the identified elements, ingredients, components, or steps and other elements, ingredients, components, or steps that do not materially affect the basic novel characteristics of the combination. The use of the terms "comprising" or "including" to describe a combination of elements, ingredients, components, or steps herein also contemplates embodiments consisting essentially of these elements, ingredients, components, or steps. By using the term "may," it is intended to indicate that any attribute described as "may" be optional.

[0071] Multiple elements, ingredients, parts or steps can be provided by a single integrated element, ingredient, part or step. Alternatively, a single integrated element, ingredient, part or step can be divided into separate multiple elements, ingredients, parts or steps. The disclosure of "a" or "an" to describe an element, ingredient, part or step is not intended to exclude other elements, ingredients, parts or steps.

[0072] It should be understood that the above description is for illustration and not for limitation. Many embodiments and many applications beyond the examples provided will be apparent to those skilled in the art upon reading the above description. Therefore, the scope of the present teachings should not be determined with reference to the above description, but rather with reference to the appended claims and the full scope of equivalents to which such claims are entitled. For the purpose of comprehensiveness, all articles and references, including disclosures of patent applications and publications, are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein in the preceding claims is not intended to be a disclaimer of such subject matter, nor should it be considered that the inventors did not consider such subject matter to be part of the disclosed utility model subject matter.

Claims

1. A closed two-stage integrated filtration device, characterized in that: include: A box body, wherein the box body is provided with a feed inlet, a liquid discharge outlet, and a first discharge outlet; a first-stage filter assembly arranged in the box body, the first-stage filter assembly comprising a plurality of horizontally arranged bars, and a rake tooth plate movably arranged above the bars, the bars being fixedly arranged in the box body and being located between the feed port and the first discharge port, the rake tooth plate being provided with a plurality of first rake teeth for extending into the gaps between the bars, the rake tooth plate cooperating with the bars moving in a direction from the feed port to the first discharge port; the height of the feed port being higher than the height of the bars, and the height of the drain port being lower than the height of the bars; A secondary filter assembly is partially arranged in the box body, and the secondary filter assembly is located between the primary filter assembly and the drain port; the secondary filter assembly includes a frame and a filter plate, and the aperture or gap of the filter plate is smaller than the gap of the bars; the frame is tilted and fixedly connected to the box body, and a second discharge port is provided near the top of the frame; the filter plate is rotatably connected to the frame, and is used to transport the screen residue to the top of the frame and then discharge it through the second discharge port.

2. The closed two-stage integrated filtration device according to claim 1, characterized in that: The bars extend along a first direction, and a plurality of the bars are spaced apart in a second direction, and the first direction and the second direction are both parallel to a horizontal plane and perpendicular to each other; a plurality of the first rake teeth are spaced apart in the second direction; the feed port and the first discharge port are respectively located on both sides of the bars in the first direction; in the first direction, the feed port, the first-stage filter assembly, the second-stage filter assembly and the drain port are arranged in sequence.

3. The closed two-stage integrated filtration device according to claim 2, characterized in that: Two groups of first rotating components are provided in the box body, and the two groups of first rotating components are spaced apart in the second direction and are arranged on the inner wall surface of the box body; the first rotating component includes a driving sprocket, a driven sprocket, and a first chain sleeved outside the driving sprocket and the driven sprocket, and the first chain is located above the grid bar; the driving sprocket and the driven sprocket are spaced apart in the first direction; the rake tooth plate is fixedly connected to the first chains of the two groups of first rotating components on both sides of the second direction; the driving sprocket is connected to a first driving member, and the first driving member is used to drive the driving sprocket to rotate, so that the moving direction of the rake tooth plate matched with the grid bar is from the feed port to the first discharge port.

4. The closed dual-stage filtration integrated device according to claim 3, characterized in that: The first-stage filter assembly also includes a slag-blocking rake arranged above the first discharge port, the slag-blocking rake is located above the first chain, and the slag-blocking rake is provided with a plurality of second rake teeth on the side facing the first chain, the plurality of second rake teeth are spaced apart in the second direction, and the second rake teeth are used to extend into the gap between adjacent first rake teeth.

5. The closed two-stage integrated filtration device according to claim 2, characterized in that: Two groups of second rotating assemblies are provided in the frame, and the two groups of second rotating assemblies are spaced apart in the second direction and are arranged on the inner wall surface of the frame; the second rotating assembly includes a second chain and a second driving member, and the two sides of the filter plate in the second direction are respectively fixedly connected to the second chains of the two groups of second rotating assemblies, and the second driving member is used to drive the second chain to drive the filter plate to rotate.

6. The closed dual-stage integrated filtration device according to claim 5, characterized in that: The frame includes a first part and a second part that are connected, the second part is located above the first part, and the bottom of the first part is fixedly connected to the bottom surface of the box body; the angle between the first part and the horizontal plane is smaller than the angle between the second part and the horizontal plane; part of the second part extends out of the box body, and the second part extending out of the box body is sealed; the second discharge port is arranged at the part close to the top of the second part and is located on the side of the second part away from the primary filter assembly.

7. The closed dual-stage integrated filtration device according to claim 6, characterized in that: The secondary filter assembly further includes a brush disposed above the second discharge port for cleaning the grating residue on the filter plate; the brush is connected to a third driving member, and the third driving member is used to drive the brush to rotate.

8. The closed dual-stage integrated filtration device according to claim 7, characterized in that: The rake plate rotates counterclockwise, the filter plate rotates clockwise, and the brush rotates counterclockwise.

9. The closed dual-stage integrated filtration device according to claim 1, characterized in that: The gap between the bars is 10 mm to 25 mm.

10. The closed dual-stage integrated filtration device according to claim 1, characterized in that: The filter plate is a circular hole plate, and the hole diameter of the circular hole plate is 2mm~8mm.

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