Desulfurization wastewater filtering device

Abstract

The invention discloses a desulfurization wastewater filtering device, and belongs to the technical field of filtering devices. The filtering piece is arranged in the tank body; the blockage removing assembly comprises a blockage removing piece arranged on the filtering piece in a sleeving mode, a floating piece installed in the tank body in a sliding mode and a limiting piece arranged on the tank body, the blockage removing piece and the floating piece are both in transmission connection with the limiting piece, and the blockage removing piece is suitable for moving in the axis direction of the filtering piece; and the limiting piece is used for stopping and starting the movement of the blockage removing piece. By utilizing the liquid level change in the tank body, the blockage removing piece is driven to do one-time reciprocating motion along the axis direction of the filtering piece in one filtering period, so that a covering object covering the filtering piece is removed, and the influence on the next filtering is avoided.

Description

Technical Field

[0001] This invention relates to the field of separation and filtration devices, and in particular to a desulfurization wastewater filtration device. Background Technology

[0002] In thermal power plants, desulfurization wastewater needs to be treated. In the evaporation and concentration process, there is a step to separate the concentrate into solid and liquid components. The supernatant obtained from the solid-liquid separation flows into the subsequent drying and solidification module for drying and solidification. In the flow path of the supernatant, it needs to go through a filtration step to perform preliminary filtration.

[0003] Existing filtration devices filter solid debris directly through a filter screen. Over time, this debris can clog the screen. Some devices install the filter screen directly inside the pipe, which also easily leads to blockage and reduced filtration efficiency. Therefore, filtration devices need to be redesigned to reduce clogging or extend their lifespan so that they don't become unusable once clogged. Summary of the Invention

[0004] In view of the problems existing in the above-mentioned desulfurization wastewater filtration devices, the present invention is proposed.

[0005] Therefore, the problem to be solved by this invention is how to solve the problem of easy clogging of filter screens during desulfurization wastewater filtration.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a desulfurization wastewater filtration device, comprising: a tank; a filter element disposed in the tank; and a blockage removal assembly, comprising a blockage removal component sleeved on the filter element, a floating component slidably installed in the tank, and a limiting component disposed on the tank, wherein the blockage removal component and the floating component are both pultrusively connected to the limiting component, the blockage removal component is adapted to move along the axial direction of the filter element, and the limiting component is used to stop and start the movement of the blockage removal component.

[0007] As a preferred embodiment of the desulfurization wastewater filtration device of the present invention, the filter element includes a filter surface, and the filter surface is provided with at least one, wherein a single filter surface is connected end to end or multiple filter surfaces are connected end to end in sequence, and the cross-sectional shape of the filter element is annular or polygonal.

[0008] As a preferred embodiment of the desulfurization wastewater filtration device of the present invention, the unclogging component includes: a mounting part having a cross-sectional shape of annular or polygonal, and the shape of the mounting part being adapted to the shape of the filter element; and a scraper part disposed at the bottom of the mounting part, the inner wall of the scraper part being in contact with the filter surface.

[0009] In a preferred embodiment of the desulfurization wastewater filtration device of the present invention, the top or bottom of the unclogging component is provided with an elastic element, the elastic element is connected to the tank body, the elastic force of the elastic element is less than the buoyancy force on the unclogging component, and the direction of the elastic force of the elastic element is opposite to the direction of the buoyancy force on the unclogging component.

[0010] In a preferred embodiment of the desulfurization wastewater filtration device of the present invention, the floating component includes: an installation pipe disposed at the top of the tank; a floating rod inserted into the installation pipe and slidably connected to the installation pipe; a float ball is provided at one end of the floating rod located inside the tank, and when the float ball is subjected to buoyancy, the floating rod slides along the axial direction of the installation pipe.

[0011] In a preferred embodiment of the desulfurization wastewater filtration device of the present invention, the limiting component includes a limiting rod; a first mounting hole is provided on the peripheral wall of the filter element; the limiting rod is elastically installed in the first mounting hole; a slot is provided on the inner peripheral wall of the unblocking component; when the unblocking component floats to the highest point, the limiting rod is used to engage with the slot; when the liquid level in the tank decreases, but the floating rod has not decreased to the lowest point, the limiting rod is used to restrict the unblocking component from moving downwards; when the floating rod decreases to the lowest point, the limiting rod releases its engagement with the slot, and the unblocking component resets.

[0012] As a preferred embodiment of the desulfurization wastewater filtration device of the present invention, the limiting component includes: a turntable, a second mounting hole provided at the top of the tank, the turntable being rotatably installed in the second mounting hole; a rotating shaft disposed at the bottom of the turntable; and a torsion spring disposed in the second mounting hole, the torsion spring being connected to the rotating shaft, and the rotating shaft extending into the filter element.

[0013] In a preferred embodiment of the desulfurization wastewater filtration device of the present invention, the limiting component further includes a transmission rod, and the top of the tank is provided with an installation groove. The transmission rod is elastically installed in the installation groove. The top of the floating rod is provided with a squeezing part, and the peripheral wall of the turntable is provided with a first protrusion. The two ends of the transmission rod respectively abut against the squeezing part and the first protrusion. When the floating rod descends to the lowest point, the squeezing part squeezes against the transmission rod, and the transmission rod drives the turntable to rotate.

[0014] In a preferred embodiment of the desulfurization wastewater filtration device of the present invention, a connecting rope is provided on the side wall of the rotating shaft, and the connecting rope is connected to the limiting rod; when the turntable rotates due to the compression of the transmission rod, the connecting rope is used to pull the limiting rod to move towards the central axis of the filter element until the limiting rod is disengaged from the unblocking element.

[0015] In a preferred embodiment of the desulfurization wastewater filtration device of the present invention, when there is no water in the tank, the lowest point of the float is higher than the highest point of the unclogging component.

[0016] The beneficial effects of this invention are as follows: by utilizing the changes in the liquid level inside the tank, the unclogging component is driven to reciprocate along the axis of the filter element once within one filtration cycle, thereby removing the covering material on the filter element and avoiding affecting the next filtration. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. 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 creative effort.

[0018] Figure 1 This is a structural diagram of a desulfurization wastewater filtration device.

[0019] Figure 2 This is a structural diagram of the filter elements and unclogging components of a desulfurization wastewater filtration device.

[0020] Figure 3 This is a cross-sectional view of the filter element in a desulfurization wastewater filtration device.

[0021] Figure 4 This is a cross-sectional view of the top of the tank of the desulfurization wastewater filtration device.

[0022] Figure 5 This is a cross-sectional view of the desulfurization wastewater filtration device when it is not filled with water.

[0023] Figure 6 This is a cross-sectional view of the desulfurization wastewater filtration device after water injection.

[0024] Figure 7 This is a cross-sectional view of the desulfurization wastewater filtration device after drainage and before cleaning.

[0025] In the diagram: 11. Tank body; 111. Second mounting hole; 112. Mounting groove; 12. Filter element; 121. Filter surface; 122. First mounting hole; 2. Unclogging assembly; 21. Unclogging component; 211. Elastic component; 212. Mounting part; 213. Scraper part; 214. Slot; 22. Floating component; 221. Mounting tube; 222. Floating rod; 223. Float ball; 224. Extrusion part; 23. Limiting component; 231. Limiting rod; 232. Turntable; 233. Rotating shaft; 234. Torsion spring; 235. Transmission rod; 236. First protrusion; 237. Connecting rope. Detailed Implementation

[0026] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0027] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0028] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places throughout this specification does not necessarily refer to the same embodiment, nor is it a single embodiment or an embodiment selectively excluded from other embodiments.

[0029] Example 1, referring to Figure 1 and Figure 2 This is the first embodiment of the present invention, which provides a desulfurization wastewater filtration device, including a tank 11, a filter element 12, and a cleaning assembly 2. The tank 11 is used to install the cleaning assembly 2, which is used to remove the covering material on the filter element 12, thereby extending the service life of the filtration device.

[0030] Specifically, the tank 11 is vertically arranged, with an inlet on the side wall and an outlet at the center of the bottom. The inlet is used to inject wastewater into the tank 11, and the filtered wastewater is discharged through the outlet. The inlet and outlet do not open simultaneously but open alternately. During one filtration cycle, when injecting liquid: the outlet is closed and the inlet is open, and wastewater is injected into the tank 11 through the inlet. When filtering, the inlet is closed and the outlet is open, and the waste liquid is discharged from the outlet after filtration.

[0031] The filter element 12 is vertically arranged and coaxially arranged with the tank body 11. During filtration, the waste liquid in the tank body 11 flows from the periphery to the center and is filtered when it passes through the filter element 12.

[0032] The unclogging component 2 includes an unclogging component 21, a floating component 22, and a limiting component 23. The unclogging component 21 is sleeved on the filter element 12. In the initial state, the unclogging component 21 is located near the bottom outlet of the tank 11. When liquid is injected into the tank 11, the unclogging component 21 is buoyed and rises along the axis of the filter element 12. After the liquid is discharged from the tank 11, the unclogging component 21 descends along the axis of the filter element 12 to the initial position. During the descent of the unclogging component 21, the unclogging component 21 scrapes off the covering material on the filter element 12.

[0033] The floating component 22 and the limiting component 23 are mounted on the tank body 11. The floating component 22 also rises due to buoyancy. When the unclogging component 21 rises to its highest point along the axis of the filter element 12 due to buoyancy, the limiting component 23 engages with the unclogging component 21. Both the unclogging component 21 and the floating component 22 are connected to the limiting component 23 via a transmission mechanism. After the tank body 11 discharges liquid, the floating component 22 returns to its initial position under gravity. At this time, the floating component 22 drives the limiting component 23 to move, thereby releasing the unclogging component 21 from its engaging state. The unclogging component 21 then descends along the axis of the filter element 12.

[0034] When the tank 11 is filled with water, the unblocking component 21 floats on the water surface until it engages with the limiting component 23, and the floating component 22 also floats on the water surface. When the tank 11 is drained, the floating component 22 descends and resets under its own weight, so that the limiting component 23 is released from the engagement with the unblocking component 21. The unblocking component 21 is used to move along the axial direction of the filter element 12 and scrape off the covering material on the surface of the filter element 12.

[0035] Example 2, refer to Figures 1-7 This is the second embodiment of the present invention, which is based on the previous embodiment.

[0036] Specifically, the filter element 12 includes a filter surface 121, and at least one filter surface 121 is provided. A single filter surface 121 may be connected end-to-end, or multiple filter surfaces 121 may be connected end-to-end sequentially. The cross-sectional shape of the filter element 12 is annular or polygonal, where the polygonal shape can be triangular, quadrilateral, pentagonal, or hexagonal. In this embodiment, there is one filter surface 121, and the filter element 12 formed by connecting the single filter surface 121 end-to-end has an annular cross-sectional shape.

[0037] Preferably, the declogging component 21 includes a mounting portion 212 and a scraper portion 213. The mounting portion 212 has a cross-sectional shape that is annular or polygonal. In this embodiment, the mounting portion 212 also has an annular cross-sectional shape, so that the shape of the mounting portion 212 matches the shape of the filter element 12. The scraper portion 213 is disposed at the bottom of the mounting portion 212, and the inner wall of the scraper portion 213 is in contact with the filter surface 121. During the descent of the declogging component 21, the scraper portion 213 scrapes away the covering material on the filter surface 121.

[0038] Preferably, the top or bottom of the unclogging component 21 is provided with an elastic element 211. In this embodiment, the top of the unclogging component 21 is provided with an elastic element 211, and the elastic element 211 in this embodiment is a spring. The spring is connected to the inner top wall of the tank body 11. The elastic force of the elastic element 211 is less than the buoyancy force on the unclogging component 21, and the direction of the elastic force of the elastic element 211 is opposite to the direction of the buoyancy force on the unclogging component 21, ensuring that the buoyancy force on the unclogging component 21 is used to overcome the elastic force of the elastic element 211 and rise. When the unclogging component 21 is subjected to buoyancy, the buoyancy force is greater than the elastic force of the elastic element 211, causing the unclogging component 21 to rise along the axial direction of the filter element 12. At this time, the elastic element 211 is gradually compressed until the unclogging component 21 rises to the highest point.

[0039] Preferably, the floating component 22 includes an installation pipe 221 and a floating rod 222. The installation pipe 221 passes through the top of the tank 11 and is vertically arranged, while the floating rod 222 is inserted into the installation pipe 221 and is slidably connected to the installation pipe 221. A float ball 223 is provided at one end of the floating rod 222 inside the tank 11. When water is injected into the tank 11, the float ball 223 is subjected to buoyancy, causing the floating rod 222 to slide upward along the axial direction of the installation pipe 221. When the tank 11 is drained, the floating rod 222 is subjected to gravity and descends until it returns to its original position.

[0040] Preferably, the limiting member 23 includes a limiting rod 231. A first mounting hole 122 is horizontally provided on the peripheral wall of the filter element 12. The first mounting hole 122 penetrates the peripheral wall of the filter element 12. The limiting rod 231 is elastically installed in the first mounting hole 122 by a spring (not shown in the figure). The limiting rod 231 is used to slide along the axial direction of the first mounting hole 122. The end of the limiting rod 231 near the unblocking member 21 is a tip. The vertical cross-sectional shape of the tip is a right triangle, wherein the hypotenuse of this right triangle is at the bottom.

[0041] A groove 214 is formed on the inner peripheral wall of the unblocking component 21. The vertical cross-section of the groove 214 is a right-angled triangle, with the hypotenuse of the right-angled triangle also at the bottom. This ensures that when the unblocking component 21 rises, the limiting rod 231 does not obstruct its ascent, but when the unblocking component 21 attempts to descend, the limiting rod 231 obstructs its descent. That is, when the unblocking component 21 floats to its highest point, the limiting rod 231 engages with the groove 214. When the liquid level in the tank 11 decreases, the floating... When the rod 222 has not descended to the lowest point, the floating rod 222 does not trigger the movement of the limiting rod 231. At this time, the limiting rod 231 is used to restrict the downward movement of the unblocking component 21. When the floating rod 222 descends to the lowest point, the floating rod 222 triggers the movement of the limiting rod 231. After the limiting rod 231 is released from the locking state with the slot 214, the unblocking component 21 is reset under the action of the elastic element 211. During the downward movement of the unblocking component 21, the covering material covering the surface of the filter element 12 is removed.

[0042] Furthermore, the limiting component 23 includes a turntable 232, a rotating shaft 233, and a torsion spring 234; a second mounting hole 111 is provided at the top center of the tank body 11. The second mounting hole 111 is vertically arranged and penetrates the top of the tank body 11. The turntable 232 is rotatably installed in the second mounting hole 111. When the side of the turntable 232 is subjected to a thrust, the turntable 232 is used to rotate along its own circumference; the rotating shaft 233 is located at the bottom of the turntable 232 and is coaxial with the turntable 232. The torsion spring 234 is located in the second mounting hole 111 and is connected to the rotating shaft 233. The torsion spring 234 is used to reset the turntable 232, and the rotating shaft 233 extends into the filter element 12.

[0043] Furthermore, the limiting member 23 also includes a transmission rod 235; the top of the tank body 11 is also provided with a mounting groove 112, which is horizontally arranged, and the axis of the mounting groove 112 intersects the axis of the second mounting hole 111. The transmission rod 235 is elastically installed in the mounting groove 112 by a spring (not shown in the figure). The top of the floating rod 222 is provided with a pressing part 224, and the vertical cross-section of the pressing part 224 is also a right triangle with the hypotenuse of this right triangle at the bottom. The peripheral wall of the turntable 232 is provided with a first protrusion 23. 6. The first protrusion 236 is arc-shaped, and the two arc surfaces of the first protrusion 236 are of unequal length and bend in the same direction. The two ends of the transmission rod 235 abut against the inclined surface of the extrusion part 224 and the outer arc surface of the first protrusion 236, respectively. When the floating rod 222 descends to the lowest point, the extrusion part 224 and the transmission rod 235 are pressed together, and the transmission rod 235 moves toward the turntable 232. The transmission rod 235 drives the turntable 232 to rotate by pressing the outer arc surface of the first protrusion 236.

[0044] Furthermore, a connecting rope 237 is provided on the side wall of the rotating shaft 233 that extends into the filter element 12. The connecting rope 237 is connected to the limiting rod 231. When the turntable 232 rotates due to the pressure of the transmission rod 235, the connecting rope 237 is used to pull the limiting rod 231 towards the central axis of the filter element 12 until the limiting rod 231 disengages from the declogging component 21. Subsequently, the declogging component 21 descends, and the scraper part 213 scrapes off the covering material on the filter surface 121.

[0045] Furthermore, when there is no water in the tank 11, the lowest point of the float 223 is higher than the highest point of the unblocking component 21.

[0046] To facilitate understanding of the technical solution of this invention, its working process is briefly described below: One filtration cycle: When the tank 11 is not filled with water, the float 223 is at a low position under its own weight, and the unclogging component 21 is also at a low position under the action of the elastic component 211, and the lowest point of the float 223 is higher than the highest point of the unclogging component 21. When the outlet of tank 11 is closed and the inlet is open, wastewater is injected into tank 11 through the inlet. The unclogging component 21 is buoyed and rises along the axis of filter 12. The float 223 is also buoyed and rises. The buoyancy of the unclogging component 21 is greater than the elastic force of the elastic component 211, so that the unclogging component 21 rises along the axis of filter 12. At this time, the elastic component 211 is gradually compressed until the unclogging component 21 rises to the highest point. After the unclogging component 21 floats to the highest point, the limiting rod 231 is used to engage with the slot 214. When the inlet of tank 11 is closed and the outlet is open, waste liquid begins to be discharged, and the liquid level in tank 11 drops. At this time, the limiting rod 231 first prevents the unblocking component 21 from descending, and the floating rod 222 descends under the action of gravity until it is reset (at this time, there is no water in tank 11). When the floating rod 222 descends to the lowest point, the floating rod 222 triggers the limiting rod 231 to move. After the limiting rod 231 is released from the locking state with the slot 214, the unblocking component 21 is reset under the action of the elastic component 211. During the downward movement of the unblocking component 21, the covering material covering the surface of the filter element 12 is removed. Repeat the steps above.

[0047] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A desulfurization wastewater filtration device, characterized in that: include, Tank body (11); A filter element (12) is disposed inside the tank (11); The unclogging assembly (2) includes an unclogging component (21) sleeved on the filter element (12), a floating component (22) slidably installed in the tank body (11), and a limiting component (23) provided on the tank body (11). The unclogging component (21) and the floating component (22) are both connected to the limiting component (23) in a transmission manner. The unclogging component (21) is adapted to move along the axial direction of the filter element (12), and the limiting component (23) is used to stop and start the movement of the unclogging component (21).

2. The desulfurization wastewater filtration device as described in claim 1, characterized in that: The filter element (12) includes a filter surface (121), and the filter surface (121) is provided with at least one, wherein a single filter surface (121) is connected end to end or multiple filter surfaces (121) are connected end to end in sequence, and the cross-sectional shape of the filter element (12) is annular or polygonal.

3. The desulfurization wastewater filtration device as described in claim 2, characterized in that: The unblocking component (21) includes, The mounting part (212) has a cross-sectional shape that is annular or polygonal, and the shape of the mounting part (212) is adapted to the shape of the filter element (12); A scraper section (213) is disposed at the bottom of the mounting section (212), and the inner wall of the scraper section (213) is in contact with the filter surface (121).

4. The desulfurization wastewater filtration device according to any one of claims 1 to 3, characterized in that: The top or bottom of the unblocking component (21) is provided with an elastic element (211), the elastic element (211) is connected to the tank body (11), the elastic force of the elastic element (211) is less than the buoyancy force on the unblocking component (21), and the direction of the elastic force of the elastic element (211) is opposite to the direction of the buoyancy force on the unblocking component (21).

5. The desulfurization wastewater filtration device as described in claim 1, characterized in that: The floating element (22) includes, Installation pipe (221) is provided at the top of the tank body (11); A floating rod (222) is inserted into the mounting tube (221) and slidably connected to the mounting tube (221); one end of the floating rod (222) located inside the tank (11) is provided with a float (223). When the float (223) is subjected to buoyancy, the floating rod (222) slides along the axial direction of the mounting tube (221).

6. The desulfurization wastewater filtration device as described in claim 5, characterized in that: The limiting member (23) includes, The limiting rod (231) has a first mounting hole (122) on its peripheral wall, and the limiting rod (231) is elastically installed in the first mounting hole (122). The unblocking component (21) has a slot (214) on its inner peripheral wall. When the unblocking component (21) floats to the highest point, the limiting rod (231) is used to engage with the slot (214); When the liquid level in the tank (11) drops and the floating rod (222) does not drop to the lowest point, the limiting rod (231) is used to restrict the unblocking component (21) from moving downward; When the floating rod (222) descends to the lowest point, the limiting rod (231) releases its engagement with the slot (214), and the unblocking component (21) resets.

7. The desulfurization wastewater filtration device as described in claim 6, characterized in that: The limiting member (23) includes, Turntable (232), the top of the tank (11) is provided with a second mounting hole (111), and the turntable (232) is rotatably installed in the second mounting hole (111); A rotating shaft (233) is disposed at the bottom of the turntable (232); A torsion spring (234) is disposed in the second mounting hole (111), the torsion spring (234) is connected to the rotating shaft (233), and the rotating shaft (233) extends into the filter element (12).

8. The desulfurization wastewater filtration device as described in claim 7, characterized in that: The limiting member (23) also includes, The transmission rod (235) is provided with a mounting groove (112) at the top of the tank (11). The transmission rod (235) is elastically installed in the mounting groove (112). The top of the floating rod (222) is provided with a pressing part (224). The peripheral wall of the turntable (232) is provided with a first protrusion (236). The two ends of the transmission rod (235) respectively abut against the pressing part (224) and the first protrusion (236). When the floating rod (222) descends to its lowest point, the pressing part (224) presses against the transmission rod (235), and the transmission rod (235) drives the turntable (232) to rotate.

9. The desulfurization wastewater filtration device as described in claim 8, characterized in that: A connecting rope (237) is provided on the side wall of the rotating shaft (233), and the connecting rope (237) is connected to the limiting rod (231); When the turntable (232) rotates due to the pressure of the transmission rod (235), the connecting rope (237) is used to pull the limiting rod (231) towards the central axis of the filter element (12) until the limiting rod (231) is disengaged from the unblocking element (21).

10. The desulfurization wastewater filtration device according to any one of claims 5 to 9, characterized in that: When there is no water in the tank (11), the lowest point of the float (223) is higher than the highest point of the unblocking component (21).

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