Sludge filter pressing device for sewage treatment

Abstract

The utility model relates to a sludge filter pressing device for sewage treatment, the sludge filter pressing device comprises a filter pressing tank and a first reaction tank which are communicated with each other, the first reaction tank is provided with a first dosing channel for adding PAC, and the first reaction tank is provided with a stirring piece; the pressure filtration tank is provided with a pressure filtration assembly, and the pressure filtration assembly is used for extruding sludge and guiding sewage in the pressure filtration tank to the first reaction tank. The sludge filter pressing device for sewage treatment can reduce the content of heavy metals in sewage.

Description

Technical Field

[0001] The present application relates to the technical field of sludge disposal, and in particular to a sludge filter press device for sewage treatment. Background Art

[0002] During sludge treatment, the sludge needs to be dehydrated to reduce the water content in the sludge to facilitate subsequent sludge drying treatment; there are various methods to remove water from sludge, but the filter press method is the simplest and most efficient.

[0003] The existing sludge filter press device includes a filter press tank, on which a filter press plate is slidably installed, and a bottom wall or side wall of the filter press tank is provided with water permeable holes; after the sludge is introduced into the filter press tank, the filter press plate is driven downward to squeeze out the sewage in the sludge from the water permeable holes, and the sludge forms blocks under the heavy pressure of the filter press plate, thereby separating the sewage and the sludge, greatly reducing the water content in the sludge, so as to facilitate the subsequent disposal of the sludge.

[0004] However, in this type of sludge filter press, when the sludge contains heavy metal ions such as phosphorus, nickel, and copper, the sewage is squeezed out from the permeable holes. Although the sewage is separated from the sludge, a large portion of heavy metal ions still exist in the sewage. If directly discharged, it will pollute the environment. Utility Model Content

[0005] In order to reduce the heavy metal content in sewage, the present application provides a sludge filter press device for sewage treatment.

[0006] The present application provides a sludge filter press device for sewage treatment using the following technical solutions:

[0007] A sludge filter press device for sewage treatment comprises a filter press tank and a first reaction tank which are interconnected, wherein the first reaction tank has a first dosing channel for adding PAC, and the first reaction tank is provided with a stirring element; the filter press tank is provided with a filter press assembly, and the filter press assembly is used to squeeze the sludge and guide the sewage in the filter press tank to the first reaction tank.

[0008] By adopting the above technical scheme, the sludge is led to the filter press tank through the arrangement of the first reaction tank and the filter press assembly, and then the sludge is squeezed by the filter press assembly to form a sludge block to separate the sludge and sewage, and then the sewage is led to the first reaction tank through the filter press assembly, PAC (polyaluminium chloride) is added through the first dosing channel, and the sewage and PAC are stirred by the stirring element to make PAC and sewage undergo precipitation reaction, thereby reducing the heavy metal content in the sewage to reduce environmental pollution.

[0009] Optionally, the filter press assembly includes a filter press plate, a movable plate, a reset member and a driving member, the filter press plate is slidably installed in the filter press tank, the filter press plate separates the filter press tank into a filter press area and a guide area, the guide area is connected to the first reaction tank; the movable plate is slidably installed on the side wall of the filter press plate close to the guide area so as to be able to approach or move away from the filter press plate, the plate surface of the filter press plate is provided with a first water permeable hole, and the plate surface of the movable plate is provided with a second water permeable hole that is offset from the first water permeable hole; the reset member is arranged between the filter press plate and the movable plate, and the reset member normally makes the filter press plate and the movable plate fit each other; the driving member is arranged on the filter press plate to drive the filter press plate to approach or move away from the filter press area.

[0010] By adopting the above technical scheme, the sludge to be filtered is guided to the filter press area through the arrangement of the filter press plate, the movable plate, the reset member and the driving member, and the filter press plate is driven by the driving member to move toward the side close to the filter press area to squeeze the sludge, and the sewage in the sludge can squeeze the movable plate, so that the movable plate moves toward the side away from the filter press plate and a gap exists between the filter press plate and the movable plate, and the sewage can enter the guide area through the first water permeable hole and the second water permeable hole in turn; after the sludge is squeezed into blocks, the filter press plate is driven by the driving member to move toward the side close to the guide area, and at this time, the movable plate fits with the filter press plate under the action of the reset member, so as to close the first water permeable hole and the second water permeable hole, and as the filter press plate continues to move, the movable plate can push the sewage and push the sewage to the first reaction tank for precipitation reaction, thereby greatly improving the working efficiency of sewage transfer.

[0011] Optionally, a mounting groove is provided on the plate surface of the movable plate near the filter press plate, and the reset member includes a reset spring, one end of the reset spring is connected to the mounting groove, and the other end is connected to the filter press plate, and the reset spring normally makes the filter press plate and the movable plate fit each other.

[0012] By adopting the above-mentioned technical solution and setting the reset spring, the installation groove provides an installation space for the reset spring, so that the filter press plate and the movable plate are normally fitted to each other under the action of the reset spring, and then when the filter press plate moves toward the side close to the guide area, the movable plate can guide the sewage to the first reaction tank.

[0013] Optionally, a plate surface of the filter press plate is provided with a blanking hole penetrating the filter press plate, and the blanking hole is arranged opposite to the mounting groove.

[0014] By adopting the above technical solution and setting the drop holes, when the filter press plate and the movable plate are in contact with each other, the sludge or sewage in the installation groove can fall back to the filter press area through the drop holes to reduce the possibility of clogging of the installation groove.

[0015] Optionally, the guide zone is located above the filter press zone, and a connecting pipe is provided between the filter press tank and the first reaction tank, the inlet end of the connecting pipe is connected to the side wall of the filter press tank and connected to the guide zone, the outlet end of the connecting pipe is connected to the side wall of the first reaction tank and connected to the interior of the first reaction tank, and the guide zone is interconnected with the first reaction tank through the connecting pipe.

[0016] By adopting the above technical solution and setting a connecting pipe, the guide area and the first reaction tank are connected to each other.

[0017] Optionally, the connecting pipe gradually decreases in height from a side close to the filter press tank to a side away from the filter press tank.

[0018] By adopting the above technical solution, the connecting pipe is set to be inclined, so that the sewage entering the connecting pipe can fall into the first reaction tank under the action of gravity, reducing the possibility of sewage being retained in the connecting pipe.

[0019] Optionally, the plate surface of the movable plate away from the filter press plate gradually decreases in height from a side away from the inlet end of the connecting pipe to a side close to the inlet end of the connecting pipe.

[0020] By adopting the above technical solution, the plate surface of the movable plate away from the filter press plate is set to be inclined, so that the sewage on the movable plate can be collected at the inlet end of the connecting pipe under the action of its own gravity, thereby improving the efficiency of sewage entering the first reaction tank.

[0021] Optionally, a second reaction tank is provided on one side of the first reaction tank, and the second reaction tank has a second dosing channel for adding PAC; the first reaction tank is connected to a pumping pipe for extracting upper water in the first reaction tank, the outlet end of the pumping pipe is connected to the second reaction tank, and the pumping pipe is installed with a pumping pump.

[0022] By adopting the above technical solution and setting up a second reaction tank, after the sewage undergoes precipitation reaction in the first reaction tank, the separated water in the first reaction tank is pumped to the second reaction tank through a pumping pipe, and PAC is added to the second reaction tank to undergo precipitation reaction again, so as to further reduce the content of heavy metals in the sewage.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. Through the setting of the first reaction tank and the filter press assembly, the sludge is led to the filter press tank, and then the sludge is squeezed by the filter press assembly to form a sludge block to separate the sludge and sewage. Then the sewage is led to the first reaction tank through the filter press assembly, PAC (polyaluminium chloride) is added through the first dosing channel, and the sewage and PAC are stirred by the stirring element to make PAC and sewage precipitate and react, thereby reducing the heavy metal content in the sewage to reduce environmental pollution;

[0025] 2. Through the arrangement of the filter press plate, the movable plate, the reset member and the driving member, the sludge to be filtered is guided to the filter press area, and the filter press plate is driven by the driving member to move toward the side close to the filter press area to squeeze the sludge. The sewage in the sludge can squeeze the movable plate, so that the movable plate moves toward the side away from the filter press plate and a gap exists between the filter press plate and the movable plate, and the sewage can enter the guide area through the first water permeable hole and the second water permeable hole in sequence; after the sludge is squeezed into blocks, the filter press plate is driven by the driving member to move toward the side close to the guide area, and at this time, the movable plate fits with the filter press plate under the action of the reset member, so as to close the first water permeable hole and the second water permeable hole. With the continuous movement of the filter press plate, the movable plate can push the sewage and push the sewage to the first reaction tank for precipitation reaction, which greatly improves the working efficiency of sewage transfer;

[0026] 3. Through the setting of the second reaction tank, after the sewage undergoes precipitation reaction in the first reaction tank, the separated water in the first reaction tank is pumped to the second reaction tank through the pumping pipe, and PAC is added to the second reaction tank for precipitation reaction again to further reduce the content of heavy metals in the sewage. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of this embodiment;

[0028] Figure 2 It is a partial cross-sectional view showing the filter press assembly;

[0029] Figure 3 yes Figure 2 Enlarged view of point A in the middle.

[0030] Explanation of the reference numerals in the accompanying drawings: 1. filter press tank; 11. filter press area; 12. guide area; 13. collecting tank; 14. collecting box; 15. feeding pipe; 2. first reaction tank; 21. first dosing channel; 22. drain pipe; 23. valve; 3. stirring element; 31. stirring motor; 32. stirring paddle; 4. filter press assembly; 41. filter press plate; 411. first water permeable hole; 412. drop hole; 42. movable plate; 421. second water permeable hole; 422. mounting groove; 43. reset spring; 44. driving cylinder; 5. connecting pipe; 6. second reaction tank; 61. second dosing channel; 7. suction pipe; 71. suction pump. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-3 This application is described in further detail.

[0032] The embodiment of the present application discloses a sludge filter press device for sewage treatment.

[0033] Reference Figure 1 , Figure 2A sludge filter press device for sewage treatment includes a filter press tank 1, a first reaction tank 2 and a second reaction tank 6. The first reaction tank 2 is located at one side of the filter press tank 1. In this embodiment, the top of the first reaction tank 2 is open and forms a first dosing channel 21. The second reaction tank 6 is located at a side of the first reaction tank 2 away from the filter press tank 1. The top of the second reaction tank 6 is open and forms a second dosing channel 61. Both the first dosing channel 21 and the second dosing channel 61 are used to add PAC (polyaluminium chloride).

[0034] Reference Figure 1 , Figure 2 The filter press tank 1 is installed with a filter press assembly 4, which is used to squeeze the sludge and guide the sewage in the filter press tank 1 to the first reaction tank 2; the filter press assembly 4 includes a filter press plate 41, a movable plate 42, a reset member and a driving member, the filter press plate 41 is slidably installed in the filter press tank 1, the side wall of the filter press plate 41 is in contact with the inner wall of the filter press tank 1, the movable plate 42 separates the filter press tank 1 into a filter press area 11 and a guide area 12, and the guide area 12 is located above the filter press area 11; a plurality of first water permeable holes 411 are opened on the plate surface of the filter press plate 41, all the first water permeable holes 411 are evenly distributed along the plate surface of the filter press plate 41, and each first water permeable hole 411 is a through hole that penetrates the filter press plate 41.

[0035] Reference Figure 2 , Figure 3 The movable plate 42 is slidably installed on one side of the filter press plate 41 close to the guide area 12 so as to be able to approach or move away from the filter press plate 41; a plurality of second water permeable holes 421 are opened on the plate surface of the movable plate 42, and all the second water permeable holes 421 are evenly distributed along the plate surface of the movable plate 42, and each second water permeable hole 421 is a through hole penetrating the movable plate 42. In this embodiment, all the first water permeable holes 411 and all the second water permeable holes 421 are staggered.

[0036] Reference Figure 2 , Figure 3 A plurality of mounting grooves 422 are provided on the plate surface of the movable plate 42 close to the filter press plate 41. In the present embodiment, a plurality of reset members are provided and are arranged corresponding to the plurality of mounting grooves 422. The reset member is provided as a reset spring 43. One end of the reset spring 43 is fixedly connected to the inner wall of the mounting groove 422, and the other end is fixedly connected to the plate surface of the filter press plate 41 close to the movable plate 42. The movable plate 42 is slidably installed on the filter press plate 41 through the reset spring 43. The reset spring 43 normally makes the filter press plate 41 and the movable plate 42 fit each other.

[0037] Reference Figure 2 , Figure 3 A plurality of blanking holes 412 are provided on the plate surface of the filter press plate 41 . All the blanking holes 412 are arranged corresponding to all the mounting grooves 422 . All the blanking holes 412 are through holes penetrating the filter press plate 41 .

[0038] Reference Figure 1 , Figure 2 The driving member is arranged on the filter press plate 41 to drive the filter press plate 41 to approach or move away from the filter press area 11; in this embodiment, the driving member is arranged to be a driving cylinder 44, the cylinder body of the driving cylinder 44 is fixedly installed on the top of the filter press tank 1, and the piston rod of the driving cylinder 44 passes through the movable plate 42 and is connected and fixed to the plate surface of the filter press plate 41, driving the piston rod of the driving cylinder 44 to extend or retract, which can drive the filter press plate 41 to approach or move away from the filter press area 11.

[0039] Reference Figure 1 , Figure 2 A collecting groove 13 is provided on the side wall of the filter press tank 1, and the collecting groove 13 is connected to the filter press area 11. A collecting box 14 is slidably installed on the collecting groove 13. In this embodiment, the top of the collecting box 14 is open. When the collecting box 14 is embedded in the collecting groove 13, the inner wall of the collecting box 14 is kept flush with the inner wall of the filter press tank 1; the filter press tank 1 is provided with a feeding pipe 15 for conveying sludge, and the outlet end of the feeding pipe 15 passes through the side wall of the filter press tank 1 and is connected to the filter press area 11; the filter press plate 41 is driven to move downward, and the filter press plate 41 can squeeze the sludge in the filter press area 11 and squeeze it into blocks in the collecting box 14. The collecting box 14 is pulled out to take out the squeezed sludge.

[0040] Reference Figure 1 , Figure 2 A connecting pipe 5 is installed between the filter press 1 and the first reaction tank 2. The inlet end of the connecting pipe 5 is fixedly connected to the side wall of the filter press 1 and connected to the guide area 12. The outlet end of the connecting pipe 5 is fixedly connected to the side wall of the first reaction tank 2 and connected to the inside of the first reaction tank 2. The guide area 12 is connected to the first reaction tank 2 through the connecting pipe 5.

[0041] Reference Figure 1 , Figure 2 In this embodiment, the height of the connecting pipe 5 gradually decreases from the side close to the filter press tank 1 to the side away from the filter press tank 1, and the upper surface of the movable plate 42 gradually decreases from the side away from the inlet end of the connecting pipe 5 to the side close to the inlet end of the connecting pipe 5.

[0042] Reference Figure 1 , Figure 2A sewage pipe 22 is installed at the bottom of the first reaction tank 2 and the bottom of the second reaction tank 6, and a valve 23 for opening and closing the sewage pipe 22 is installed on the outer wall of the sewage pipe 22; a pumping pipe 7 is connected between the first reaction tank 2 and the second reaction tank 6, and the inlet end of the pumping pipe 7 extends to the bottom of the first reaction tank 2 to extract the upper layer of water in the first reaction tank 2, and the outlet end of the pumping pipe 7 is connected to the inside of the second reaction tank 6, and the first reaction tank 2 and the second reaction tank 6 are connected to each other through the pumping pipe 7; a pumping pump 71 is fixedly installed on the outer wall of the pumping pipe 7; it should be noted that after the sewage in the second reaction tank 6 undergoes precipitation reaction, an external pumping hose (not shown in the figure) is required to extract the upper layer of water in the second reaction tank 6, so that the sewage in the second reaction tank 6 is separated from the sediment.

[0043] Reference Figure 1 , Figure 2 A stirring member 3 is installed in both the first reaction tank 2 and the second reaction tank 6. In this embodiment, the stirring member 3 includes a stirring motor 31 and a stirring paddle 32. The stirring motor 31 is fixedly installed on the top of the first reaction tank 2 or the top of the second reaction tank 6. The stirring paddle 32 is vertically arranged. One end of the stirring paddle 32 is coaxially connected to the output shaft of the stirring motor 31, and the other end extends into the first reaction tank 2 or the second reaction tank 6. The stirring paddle 32 is driven to rotate by the stirring motor 31 to stir the sewage in the first reaction tank 2 or the second reaction tank 6, thereby improving the precipitation reaction effect between the sewage and PAC.

[0044] The implementation principle of a sludge filter press device for sewage treatment in an embodiment of the present application is as follows: the sludge to be filtered is introduced into the filter press area 11 by the feed pipe 15, and the filter press plate 41 is driven to move downward to squeeze the sludge into blocks; during the downward movement of the filter press plate 41, the sewage in the sludge squeezes the movable plate 42 and flows into the guide area 12 through the first water permeable hole 411 and the second water permeable hole 421; after the sludge is squeezed, the filter press plate 41 is driven to move upward, and the movable plate 42 is kept in contact with the filter press plate 41 under the action of the return spring 43, so as to be closed at the first water permeable hole 411 and the second water permeable hole 421. Driven by the filter press plate 41, the movable plate 42 lifts the sewage in the guide area 12 upward, so that the sewage can flow to the first reaction tank 2 through the connecting pipe 5.

[0045] After the sewage enters the first reaction tank 2, PAC is added to the first reaction tank 2 and the sewage is stirred by the stirring paddle 32 to cause a precipitation reaction in the sewage, thereby reducing the content of heavy metals in the sewage; after the sewage in the first reaction tank 2 undergoes a precipitation reaction, it is pumped to the second reaction tank 6 through the pumping pipe 7 to continue the precipitation reaction, thereby further reducing the content of heavy metals in the sewage, improving the sewage treatment effect, and reducing pollution to the environment.

[0046] The above are preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A sludge filter press device for sewage treatment, characterized in that: The invention comprises a filter press tank (1) and a first reaction tank (2) which are interconnected, wherein the first reaction tank (2) has a first dosing channel (21) for adding PAC, and the first reaction tank (2) is provided with a stirring element (3); the filter press tank (1) is provided with a filter press assembly (4), and the filter press assembly (4) is used to squeeze sludge and guide sewage from the filter press tank (1) to the first reaction tank (2).

2. A sludge filter press device for sewage treatment according to claim 1, characterized in that: The filter press assembly (4) comprises a filter press plate (41), a movable plate (42), a reset member and a drive member. The filter press plate (41) is slidably mounted in the filter press tank (1). The filter press plate (41) separates the filter press tank (1) into a filter press area (11) and a guide area (12). The guide area (12) is connected to the first reaction tank (2). The movable plate (42) is slidably mounted on the side wall of the filter press plate (41) close to the guide area (12) so as to be able to approach or move away from the filter press plate (41). The plate surface of the filter press plate (41) is provided with a first water permeable hole (411), and the plate surface of the movable plate (42) is provided with a second water permeable hole (421) which is offset from the first water permeable hole (411); the reset member is arranged between the filter press plate (41) and the movable plate (42), and the reset member normally makes the filter press plate (41) and the movable plate (42) fit each other; the driving member is arranged on the filter press plate (41) to drive the filter press plate (41) to approach or move away from the filter press area (11).

3. A sludge filter press device for sewage treatment according to claim 2, characterized in that: The movable plate (42) is provided with a mounting groove (422) on the plate surface close to the filter press plate (41), and the reset member includes a reset spring (43), one end of the reset spring (43) is connected to the mounting groove (422), and the other end is connected to the filter press plate (41), and the reset spring (43) normally makes the filter press plate (41) and the movable plate (42) fit each other.

4. A sludge filter press device for sewage treatment according to claim 3, characterized in that: The plate surface of the filter press plate (41) is provided with a material drop hole (412) penetrating the filter press plate (41), and the material drop hole (412) is arranged opposite to the mounting groove (422).

5. A sludge filter press device for sewage treatment according to claim 2, characterized in that: The guide area (12) is located above the filter press area (11); a connecting pipe (5) is provided between the filter press tank (1) and the first reaction tank (2); an inlet end of the connecting pipe (5) is connected to the side wall of the filter press tank (1) and is connected to the guide area (12); an outlet end of the connecting pipe (5) is connected to the side wall of the first reaction tank (2) and is connected to the interior of the first reaction tank (2); the guide area (12) is connected to the first reaction tank (2) via the connecting pipe (5).

6. A sludge filter press device for sewage treatment according to claim 5, characterized in that: The connecting pipe (5) gradually decreases in height from a side close to the filter press tank (1) to a side far from the filter press tank (1).

7. A sludge filter press device for sewage treatment according to claim 5, characterized in that: The plate surface of the movable plate (42) away from the filter press plate (41) gradually decreases in height from the side away from the inlet end of the connecting pipe (5) to the side close to the inlet end of the connecting pipe (5).

8. A sludge filter press device for sewage treatment according to claim 1, characterized in that: The invention also comprises a second reaction tank (6) arranged on one side of the first reaction tank (2), the second reaction tank (6) having a second dosing channel (61) for adding PAC; the first reaction tank (2) is connected to a pumping pipe (7) for extracting upper layer water in the first reaction tank (2), the outlet end of the pumping pipe (7) is connected to the second reaction tank (6), and the pumping pipe (7) is installed with a pumping pump (71).

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