CN115367983A

CN115367983A - Sludge dewatering and deep dewatering integrated treatment equipment and treatment process thereof

Info

Publication number: CN115367983A
Application number: CN202211072307.3A
Authority: CN
Inventors: 陈磊; 刘桂林; 陈旭; 周明明
Original assignee: Guangzhou Green State Environment Technology Co ltd
Current assignee: Guangzhou Green State Environment Technology Co ltd
Priority date: 2022-09-02
Filing date: 2022-09-02
Publication date: 2022-11-22

Abstract

The invention discloses sludge dewatering and deep dewatering integrated treatment equipment which comprises a rack, wherein a plurality of filter frames are movably arranged on the rack, a hydraulic cylinder for driving the filter frames is arranged at one end of the rack, filter cloth is arranged on two sides of each filter frame, metal filter screens are respectively arranged on two sides in the filter frames through air springs, heating wires are arranged in the metal filter screens, and the metal filter screens are pressed on the inner sides of the filter cloth; install the slide bar through the cylinder in the frame, the cylinder drives the slide bar and reciprocates, and the slip cup joints the connecting rod with the metal filter screen one-to-one on the slide bar, has seted up the through-hole on the filter frame, and the connecting rod runs through the through-hole setting, and there is strip suction means the bottom of connecting rod through first spring coupling, and strip suction means crimping is on the metal filter screen, strip suction means and negative pressure straw intercommunication. The invention can improve the defects of the prior art and improve the dehydration rate of sludge dehydration.

Description

Sludge dewatering and deep dewatering integrated treatment equipment and treatment process thereof

Technical Field

The invention relates to the technical field of sludge dehydration treatment, in particular to sludge dehydration and deep dehydration integrated treatment equipment and a treatment process thereof.

Background

The dehydration and drying of the sludge are an important step of the resource utilization of the sludge. In the prior art, a plate-and-frame filter press is generally used for dehydrating sludge to produce a sludge cake. However, the existing plate-and-frame filter press has low dehydration rate and is unfavorable for the subsequent deep processing of the mud cake.

Disclosure of Invention

The invention aims to provide sludge dewatering and deep dewatering integrated treatment equipment and a treatment process thereof, which can overcome the defects of the prior art and improve the dewatering rate of sludge dewatering.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows.

A sludge dewatering and deep dewatering integrated treatment device comprises a rack, wherein a plurality of filter frames are movably mounted on the rack, a hydraulic cylinder for driving the filter frames is mounted at one end of the rack, filter cloth is mounted on two sides of each filter frame, metal filter screens are mounted on two sides of the interior of each filter frame through air springs respectively, heating wires are mounted in the metal filter screens, and the metal filter screens are pressed on the inner sides of the filter cloth; install the slide bar through the cylinder in the frame, the cylinder drives the slide bar and reciprocates, and the slip cup joints the connecting rod with the metal filter screen one-to-one on the slide bar, has seted up the through-hole on the filter frame, and the connecting rod runs through the through-hole setting, and there is strip suction means the bottom of connecting rod through first spring coupling, and strip suction means crimping is on the metal filter screen, strip suction means and negative pressure straw intercommunication.

Preferably, the strip-shaped suction mechanism comprises a shell, a rubber inner sleeve is sleeved on the inner wall of the shell, the outer edge of the rubber inner sleeve is in compression joint with the metal filter screen, and a brush is arranged on the outer side of the shell.

Preferably, the rubber inner sleeve comprises a fixed part fixed on the inner wall of the shell and a movable part located above the fixed part and connected with the fixed part, the side wall of the movable part is in sliding contact with the inner wall of the shell, two flanges are symmetrically arranged on the inner side of the movable part, the top of the movable part is located on the outer side of the shell, when the air spring is not inflated, the movable part is in a compressed and bent state, the flanges are close to each other, and the negative pressure airflow flowing space of the rubber inner sleeve is reduced.

Preferably, a reset spring sheet is arranged in the movable part.

The treatment process of the sludge dewatering and deep dewatering integrated treatment equipment comprises the following steps:

A. the hydraulic cylinder drives the filter frames to be pressed and closed mutually, and sludge to be treated is injected into a cavity between the adjacent filter frames;

B. water in the sludge flows into the filter frame through the filter cloth and is then discharged; when the drainage flow rate of the filter frame is reduced to 30% of the initial drainage flow rate, starting a heating wire to heat sludge, and simultaneously starting a negative pressure suction pipe and driving a strip-shaped suction mechanism to reciprocate on the surface of the metal filter screen by using an air cylinder to suck water in the sludge;

C. when the negative pressure suction pipe does not suck water, the air spring is inflated to enable the metal filter screen to push the filter cloth to extrude sludge, and deep dehydration is carried out.

Preferably, in step C, the moving speed of the strip-shaped sucking means is reduced.

The beneficial effect that adopts above-mentioned technical scheme to bring lies in: the filter press deeply optimizes the existing plate-and-frame filter press, realizes the function of deeply dehydrating the mud cake by pushing the filter cloth by the filter screen in the filter pressing process by installing the movable filter screen in the filter frame, and simultaneously adds a heating function in the filter screen for heating and drying the mud cake. The strip-shaped suction mechanism is used for sucking moisture penetrating through the filter cloth on the inner side of the filter screen, the moisture discharge amount is large in the initial stage of negative pressure suction, the pipe diameter of the negative pressure suction pipe is small, the filter screen is used for squeezing the rubber inner sleeve to reduce the flowing space of negative pressure airflow of the rubber inner sleeve, and the phenomenon that the excessive negative pressure airflow influences the outflow of the moisture depending on the self gravity can be avoided. After the air spring is inflated, the filter screen is pushed to move outwards, so that the extrusion of the filter screen to the rubber inner sleeve is reduced, the negative pressure airflow flowing space is gradually increased, and the requirement for moisture absorption in the later period is met. The design of the mechanism can avoid the independent installation of the flow regulating device, not only simplifies the equipment composition, reduces the equipment transformation cost, but also improves the overall reliability of the equipment.

Drawings

FIG. 1 is a block diagram of one embodiment of the present invention.

FIG. 2 is a diagram of the construction of a filter frame according to an embodiment of the present invention.

Fig. 3 is a cross-sectional view of a strip suction mechanism in one embodiment of the present invention.

Fig. 4 is a structural view of the flanges in a state of being pressed against each other inside the strip-shaped sucking means in one embodiment of the present invention.

In the figure: 1. a frame; 2. a filter frame; 3. a hydraulic cylinder; 4. filtering cloth; 5. a metal screen; 6. heating wires; 7. a cylinder; 8. a slide bar; 9. a connecting rod; 10. a through hole; 11. a first spring; 12. a strip-shaped suction mechanism; 13. a negative pressure suction pipe; 14. a housing; 15. a rubber inner sleeve; 16. a brush; 17. a fixed part; 18. a movable portion; 19. a flange; 20. resetting the elastic sheet; 21. a friction plate; 22. a step portion.

Detailed Description

Referring to fig. 1-4, one embodiment of the invention comprises a frame 1, wherein a plurality of filter frames 2 are movably mounted on the frame 1, one end of the frame 1 is provided with a hydraulic cylinder 3 for driving the filter frames 2, two sides of each filter frame 2 are provided with filter cloth 4, two sides of the interior of each filter frame 2 are respectively provided with a metal filter screen 5 through an air spring 3, a heating wire 6 is mounted in each metal filter screen 5, and the metal filter screens 5 are pressed on the inner sides of the filter cloths 4; a sliding rod 8 is installed on a rack 1 through a cylinder 7, the cylinder 7 drives the sliding rod 8 to move up and down, a connecting rod 9 in one-to-one correspondence with a metal filter screen 5 is sleeved on the sliding rod 8 in a sliding mode, a through hole 10 is formed in a filter frame 2, the connecting rod 9 penetrates through the through hole 10, the bottom end of the connecting rod 9 is connected with a strip-shaped suction mechanism 12 through a first spring 11, the strip-shaped suction mechanism 12 is in compression joint with the metal filter screen 5, and the strip-shaped suction mechanism 12 is communicated with a negative pressure suction pipe 13. The strip-shaped suction mechanism 12 comprises an outer shell 14, a rubber inner sleeve 15 is sleeved on the inner wall of the outer shell 14, the outer edge of the rubber inner sleeve 15 is in pressure joint with the metal filter screen 5, and a brush 16 is arranged on the outer side of the outer shell 14. The rubber inner sleeve 15 comprises a fixed part 17 fixed on the inner wall of the outer shell 14 and a movable part 18 located above the fixed part 17 and connected with the fixed part 17, the side wall of the movable part 18 is in sliding contact with the inner wall of the outer shell 14, two flanges 19 are symmetrically arranged on the inner side of the movable part 18, the top of the movable part 18 is located on the outer side of the outer shell 14, when the air spring 3 is not inflated, the movable part 18 is in a compressed and bent state, the flanges 19 are close to each other, and the negative pressure airflow flowing space of the rubber inner sleeve 15 is reduced. The movable part 18 is provided with a reset spring plate 20.

A friction plate 21 is provided on the inner edge of the top portion of the movable portion 18, and a stepped portion 22 is provided on the contact surface between the friction plate 21 and the metal screen 5. By means of the reciprocating movement of the strip-shaped suction mechanism 12, the friction plate 21 is matched with the hairbrush 16 to form an inner-layer cleaning mechanism and an outer-layer cleaning mechanism, the friction plate 21 scrapes the surface of the metal filter screen 5, and the hairbrush 16 cleans dirt residues scraped by the scraping.

A. the hydraulic cylinder 3 drives the filter frames 2 to be mutually pressed and closed, and sludge to be treated is injected into a cavity between the adjacent filter frames 2;

B. water in the sludge flows into the filter frame 2 through the filter cloth 4 and then is discharged; when the drainage flow rate of the filter frame 2 is reduced to 30% of the initial drainage flow rate, the heating wire 6 is started to heat the sludge, and simultaneously, the negative pressure suction pipe 13 is started and the air cylinder 7 is used for driving the strip-shaped suction mechanism 12 to reciprocate on the surface of the metal filter screen 5 to suck the water in the sludge;

C. when the negative pressure suction pipe 13 is used for sucking out water, the air spring 3 is inflated to enable the metal filter screen 5 to push the filter cloth 4 to extrude sludge, and deep dehydration is carried out.

In step C, the moving speed of the strip sucking mechanism 12 is reduced.

The feeding system and the drainage system of the plate-and-frame filter press and the matched power driving system are common knowledge in the prior art, and are not detailed here.

The invention can reduce the water content of the produced mud cake from about 60 percent to below 35 percent through the deep transformation of the prior plate-and-frame filter press.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

The foregoing shows and describes the general principles and features of the present invention, together with the advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a sludge dewatering and deep dehydration integration treatment equipment, includes frame (1), and movable mounting has a plurality of filter frame (2) on frame (1), and pneumatic cylinder (3) that are used for driving filter frame (2) are installed to the one end of frame (1), and filter cloth (4), its characterized in that are installed to filter frame (2) both sides: two sides of the interior of the filter frame (2) are respectively provided with a metal filter screen (5) through an air spring (3), a heating wire (6) is arranged in the metal filter screen (5), and the metal filter screen (5) is pressed on the inner side of the filter cloth (4); install slide bar (8) through cylinder (7) on frame (1), cylinder (7) drive slide bar (8) and reciprocate, slide on slide bar (8) and cup joint connecting rod (9) with metal filter screen (5) one-to-one, through-hole (10) have been seted up on filter frame (2), through-hole (10) setting is run through in connecting rod (9), the bottom of connecting rod (9) is connected with strip suction means (12) through first spring (11), strip suction means (12) crimping is on metal filter screen (5), strip suction means (12) and negative pressure straw (13) intercommunication.

2. The integrated sludge dewatering and deep dewatering treatment equipment as claimed in claim 1, wherein: the strip-shaped suction mechanism (12) comprises an outer shell (14), a rubber inner sleeve (15) is sleeved on the inner wall of the outer shell (14), the outer edge of the rubber inner sleeve (15) is in compression joint with the metal filter screen (5), and a brush (16) is installed on the outer side of the outer shell (14).

3. The integrated sludge dewatering and deep dewatering treatment equipment as claimed in claim 2, wherein: the rubber inner sleeve (15) comprises a fixed portion (17) fixed on the inner wall of the outer shell (14) and a movable portion (18) located above the fixed portion (17) and connected with the fixed portion (17), the side wall of the movable portion (18) is in sliding contact with the inner wall of the outer shell (14), two flanges (19) are symmetrically arranged on the inner side of the movable portion (18), the top of the movable portion (18) is located on the outer side of the outer shell (14), when the air spring (3) is not inflated, the movable portion (18) is in a compressed and bent state, the flanges (19) are close to each other, and negative pressure airflow flowing space of the rubber inner sleeve (15) is reduced.

4. The integrated sludge dewatering and deep dewatering treatment equipment as claimed in claim 3, wherein: a reset spring (20) is arranged in the movable part (18).

5. The treatment process of the integrated sludge dewatering and deep dewatering treatment equipment disclosed by any one of claims 1 to 4 is characterized by comprising the following steps of:

A. the hydraulic cylinder (3) drives the filter frames (2) to be pressed and closed mutually, and sludge to be treated is injected into a cavity between the adjacent filter frames (2);

B. water in the sludge flows into the filter frame (2) through the filter cloth (4) and is then discharged; when the drainage flow rate of the filter frame (2) is reduced to 30% of the initial drainage flow rate, the heating wire (6) is started to heat the sludge, and meanwhile, the negative pressure suction pipe (13) is started and the air cylinder (7) is used for driving the strip-shaped suction mechanism (12) to reciprocate on the surface of the metal filter screen (5) to suck the moisture in the sludge;

C. when the negative pressure suction pipe (13) sucks out water, the air spring (3) is inflated to enable the metal filter screen (5) to push the filter cloth (4) to extrude sludge, and deep dehydration is carried out.

6. The treatment process of the integrated sludge dewatering and deep dewatering treatment equipment according to claim 5, characterized in that: in the step C, the moving speed of the strip-shaped suction mechanism (12) is reduced.