CN108609834B - Hydraulic rotary filter screen cylinder - Google Patents
Hydraulic rotary filter screen cylinder Download PDFInfo
- Publication number
- CN108609834B CN108609834B CN201810729879.1A CN201810729879A CN108609834B CN 108609834 B CN108609834 B CN 108609834B CN 201810729879 A CN201810729879 A CN 201810729879A CN 108609834 B CN108609834 B CN 108609834B
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- China
- Prior art keywords
- section
- flocculation
- cylinder
- gravity
- filter cylinder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000005189 flocculation Methods 0.000 claims abstract description 55
- 230000016615 flocculation Effects 0.000 claims abstract description 55
- 230000005484 gravity Effects 0.000 claims abstract description 47
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 43
- 239000002893 slag Substances 0.000 claims abstract description 6
- 238000007789 sealing Methods 0.000 claims abstract description 4
- 239000010802 sludge Substances 0.000 abstract description 26
- 230000010354 integration Effects 0.000 abstract description 2
- 238000003756 stirring Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 230000018044 dehydration Effects 0.000 description 3
- 238000006297 dehydration reaction Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/126—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using drum filters
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Treatment Of Sludge (AREA)
- Filtration Of Liquid (AREA)
Abstract
The invention discloses a hydraulic rotary filter screen cylinder, which relates to the field of sludge treatment and comprises a central main shaft, a filter cylinder arranged on the periphery of the central main shaft, and a plurality of connecting rods for fixedly connecting the filter cylinder with the central main shaft, wherein the filter cylinder comprises a roller bracket and a cylinder surface coated on the roller bracket, the filter cylinder is sequentially divided into a flocculation section, a gravity dewatering section and a gravity concentration section, the flocculation section and the gravity dewatering section are horizontal sections of the filter cylinder, the gravity concentration section is a conical section of the filter cylinder, the cylinder surfaces of the flocculation section are sealing panels, the cylinder surfaces of the gravity concentration section and the flocculation section are mesh panels, a plurality of flocculation water tanks are arranged on the inner surface of the flocculation section and are formed by surrounding a circle center array, a water inlet pipe extends from the flocculation section, water outlet and the filter cylinder are tangentially arranged, and the tail end of the gravity concentration section is a slag hole. The floor area is small, and the integration of gravity dewatering, mixed flocculation, spiral conveying and squeezing can be realized.
Description
Technical Field
The invention relates to the field of sludge treatment, in particular to a drum-type sludge dewatering machine.
Background
Chinese patent CN207270843U discloses a belt filter press for sludge dewatering, which belongs to the technical field of sludge treatment, and comprises a main frame and an auxiliary frame, and is characterized in that: the outside of main frame is equipped with first filter belt, the outside of auxiliary frame is equipped with the second filter belt, all be equipped with a plurality of deflector rolls in main frame and the auxiliary frame, be equipped with between first filter belt and the second filter belt and squeeze device and a plurality of high-pressure dewatering roller, squeeze device includes mounting panel, movable compression roller, pressure-bearing cylinder and pneumatic cylinder one, pneumatic cylinder one fixed connection is in the lower part of auxiliary frame, the output and the mounting panel fixed connection of pneumatic cylinder one, the lower part at the mounting panel is installed to movable compression roller, pressure-bearing cylinder installs on the main frame. The utility model can fully utilize the occupied space of the equipment, multiply expand the gravity dewatering area, remove more water in the gravity dewatering area, and is beneficial to improving the dewatering effect of the press roller group and the dewatering effect of the sludge.
The technical scheme also discloses that the pressure-bearing roller performs gravity dehydration, but has poor flocculation effect and higher energy consumption, and needs to be improved.
Another example is: chinese patent CN201358206Y discloses a sludge concentrating and dewatering integrated device, which comprises a sludge mixing and feeding device, a rotary pushing gravity dewatering device, a filtering and squeezing device and a sludge cake outlet; the sludge mixing and feeding device comprises a sludge stirring tank and a sludge conveying pipe which are arranged on a frame, wherein a sludge inlet and a medicine inlet are formed in the sludge stirring tank, and stirring blades driven by a motor are arranged in the sludge stirring tank; the sludge conveying pipe is connected with the upper part of the sludge stirring tank; the rotary pushing gravity dewatering device comprises a screen drum, a drainage pipeline and a lower water collecting tank, and the screen drum is connected with a motor; the filtering and squeezing device comprises an upper filter belt, a lower filter belt and a plurality of dewatering rollers, wherein the upper filter belt and the lower filter belt are controlled by a motor, and a wedge-shaped area is formed between the upper filter belt and the lower filter belt; the dewatering rollers are distributed between the upper filter belt and the lower filter belt in an S shape. The utility model has the advantages of easy operation, stable performance and high degree of automation, and is ideal equipment for sludge dewatering treatment.
The screen drum only plays a role in gravity dewatering, the flocculation of the screen drum needs to be additionally provided with sludge stirring mud, and the screen drum is driven by a motor, so that the energy consumption is high and still needs to be improved.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the hydraulic rotary filter screen cylinder which has small occupied area and can realize the integration of gravity dewatering, mixed flocculation, spiral conveying and squeezing.
In order to achieve the purpose of the invention, the following technical scheme is provided: the hydraulic rotary filter screen cylinder comprises a central spindle, a filter cylinder arranged on the periphery of the central spindle, and a plurality of connecting rods for fixedly connecting the filter cylinder with the central spindle, and is characterized in that the filter cylinder comprises a roller bracket and a cylinder surface coated on the roller bracket, the filter cylinder is sequentially divided into a flocculation section, a gravity dewatering section and a gravity concentration section, the flocculation section and the gravity dewatering section are horizontal sections of the filter cylinder, the gravity concentration section is a conical section of the filter cylinder, the cylinder surfaces of the flocculation section are sealing panels, the cylinder surfaces of the gravity concentration section and the flocculation section are mesh panels, a plurality of flocculation water tanks are arranged on the inner surfaces of the flocculation section and surround a circle center array, a water inlet pipe extends into the flocculation section from the flocculation section, water outlet and the filter cylinder are tangentially arranged, and the tail end of the gravity concentration section is a slag hole.
Preferably, the flocculation water tank is a strip-shaped tank body, the section of the tank body is arc-shaped, and one side of the arc-shaped tank body is provided with a water retaining extension edge extending upwards. Through the arrangement, the flocculation mixing time in the water tank can be effectively prolonged.
Preferably, the included angle between the highest point of the water retaining edge and the horizontal plane of the highest point on the other side of the circular arc is 45 degrees.
Preferably, the inner surfaces of the gravity dewatering section and the gravity concentration section are provided with variable-diameter conveying spiral blades, and the spiral blades are fixedly connected with the roller bracket. Conveying and squeezing are carried out through the conveying spiral blade with the variable diameter, so that the gravity dewatering efficiency and the squeezing efficiency are greatly improved.
Preferably, the connecting rod is fixedly connected with the central spindle vertically.
The invention has the beneficial effects that: the invention uses the gravity of the flocculation water tank filled with water as a part of external force for driving the concentration roller, and the part of force is continuous and generates additional torque relative to the roller, so that the roller assists the driving motor to reduce the power. This reduction in power produces a greater torque with a greater diameter of the drum and a greater sump volume, while the central (or peripheral) drive motor may act as auxiliary power. When the torque generated by the hydraulic power is large enough, the driving motor can be omitted, and the drum is rotated only by the hydraulic power. The device can be used as a pre-stage pretreatment for sewage treatment to intercept, retain, dewater and convey slag in sewage.
Drawings
Fig. 1 is a front view of embodiment 1 of the present invention.
Fig. 2 is a left side view of fig. 1.
Fig. 3 is a schematic view of the barrel surface in fig. 1.
Fig. 4 is a front view of the sink.
Fig. 5 is a left side view of fig. 4.
Detailed Description
Example 1: the hydraulic rotary filter screen cylinder comprises a central main shaft 1, a filter cylinder 2 arranged on the periphery of the central main shaft 1, a plurality of connecting rods 3 for fixedly connecting the filter cylinder 2 with the central main shaft 1, wherein one ends of the connecting rods 3 are vertically fixedly connected with the central main shaft 1, the other ends of the connecting rods are connected with a roller support 2.1 of the filter cylinder 2, the surface of the roller support 2.1 is coated with a cylinder surface 2.2, the filter cylinder 2 is sequentially divided into a flocculation section 2A, a gravity dewatering section 2B and a gravity concentration section 2C, the flocculation section 2A and the gravity dewatering section 2B are horizontal sections of the filter cylinder 2, the gravity concentration section 2C is a conical section of the filter cylinder 2, the cylinder surface 2.2 of the flocculation section 2A is a sealing panel 2.2.2, the inner surface of the gravity concentration section 2B and the flocculation section 2A is provided with 16 flocculation tanks 4, the flocculation tanks 4 are formed by surrounding a circle center array, the flocculation tanks 4 are strip-shaped tanks, the sections of the tanks are circular arcs, and one side of the circular arcs is provided with water retaining edges 4.1 extending upwards. The included angle between the highest point of the water retaining extension 4.1 and the horizontal plane of the highest point of the arc-shaped other side 4.2 is 45 degrees. The water retaining extension 4.1 extending upwards is arranged on the outer side and is close to one side of the wall of the filter cylinder 2.
The water inlet pipe 5 extends into the flocculation section 2A, the water outlet and the filter cylinder 2 are tangentially arranged, and the tail end of the gravity concentration section 2C is provided with a slag outlet 6. The inner surfaces of the gravity dewatering section 2B and the gravity concentration section 2C are provided with variable-diameter conveying spiral blades 7, and the spiral blades 7 are fixedly connected with the roller bracket 2.1.
In the above embodiment, two ends of the central spindle 1 are arranged on the bearing seat 9, one end is connected with the driving motor 13, the water inlet valve 10 is arranged on the water inlet pipe 5, the flushing pipeline 11 is arranged above the filter cylinder 2 along the length direction of the cylinder wall, and the slag car 12 can be arranged below the port of the gravity concentration section 2B.
The specific implementation method comprises the following steps:
The first step of sludge flocculation:
1) Setting general parameters.
The drum is set to rotate at a speed of 3r/min, the linear speed pi of the outer cylinder with the diameter phi of 1.2m is calculated to be 0.19m/s, namely the moving speed of the sludge in the filter cylinder.
Setting the effective length L=1000 mm of the flocculation water tank, and the diameter of the flocculation water tank is 150mm, wherein the section of the flocculation water tank is shown in the figure, and the volume V=pi2L/2 of the water to the highest liquid level is calculated to be 0.0081 m/m.
The number of flocculation tanks is set to be 16, the flocculation tanks are uniformly distributed on the inner wall of the cylinder, and the water inflow is calculated to be 3 multiplied by 16 multiplied by 0.0081=0.39 m/min. I.e. the actual throughput of the drum is 23 m/h.
2) Calculation of flocculation time.
Flocculation time of flocculation water tank: an included angle of 5 degrees is set to the flocculation water tank relative to the horizontal central shaft, the flocculation water tank rotates from the position A to the position B, and the flocculation water tank rotates at a speed of 3r/min, namely 20s/r for flocculation mixing time. The rotation time ¼ x 20 = 3.75s from point a to point B, i.e. the effective flocculation time of the sludge is 3.75s. The exit time ¼ x ¼ x 20=1.25 s from point B to point C. The flocculation run time from point a to point C was ¼ x 20 = 5s for the cylinder.
And step two, gravity dehydration:
spiral flocculation liquid in the closed cylinder is pushed to the filter screen cylinder through continuous variable-pitch spiral blades, a filter screen cylinder frame and a central shaft are fixedly connected through steel pipes, the inside of the frame is welded with the spiral blades (left-handed), the number of spirals is 2.5, and the pitch P=300. The blade is externally wrapped with a 20-mesh stainless steel wire net, the periphery of the steel wire net is fixed on the frame through a pressing plate, the diameter phi of the steel wire is 0.4mm, and the mesh diameter reaches 0.87 multiplied by 0.87mm. The flocculated mud and water are obviously separated, the mud water deposited at the bottom of the filter screen cylinder is continuously turned over and pushed to the rear stage at the linear speed of 0.19m/s along with the rotation of the spiral blades, and the water therein is continuously and largely separated out due to gravity, so that the gravity dehydration is completed, and the water content is reduced to about 90%.
And thirdly, gravity concentration:
The sludge is pushed to the conical filter screen cylinder by the continuous spiral blades, and the water content of the sludge is reduced to about 86% by concentrating and dehydrating the sludge due to the lifting effect of the conical filter screen cylinder on the sludge.
Claims (2)
1. The hydraulic rotary filter screen cylinder comprises a central spindle, a filter cylinder arranged on the periphery of the central spindle, and a plurality of connecting rods for fixedly connecting the filter cylinder with the central spindle, and is characterized in that the filter cylinder comprises a roller bracket and a cylinder surface coated on the roller bracket, the filter cylinder is sequentially divided into a flocculation section, a gravity dewatering section and a gravity concentration section, the flocculation section and the gravity dewatering section are horizontal sections of the filter cylinder, the gravity concentration section is a conical section of the filter cylinder, the cylinder surface of the flocculation section is a sealing panel, the cylinder surfaces of the gravity concentration section and the gravity dewatering section are mesh panels, the inner surface of the flocculation section is provided with a plurality of flocculation water tanks, the flocculation water tanks are formed by surrounding a circle center array, a water inlet pipe extends into the flocculation section, water outlet and the filter cylinder are tangentially arranged, the gravity of the flocculation water tanks are used as part of external force for driving the concentration roller, the tail end of the gravity concentration section is a slag outlet, the flocculation water tanks are strip-shaped tank bodies, the section of the tank bodies is circular arc, one side of the circular arc is provided with a water retaining extension edge extending upwards, the highest point of the water retaining edge and the highest point horizontal plane of the circular arc side are 45 degrees, the inner surface of the gravity dewatering section and the gravity concentration section is provided with a conveying spiral blade with a variable diameter, and the spiral blade is fixedly connected with the roller bracket.
2. The hydraulic rotary screen cylinder of claim 1 wherein the connecting rod is fixedly connected to the central main shaft vertically.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810729879.1A CN108609834B (en) | 2018-07-05 | 2018-07-05 | Hydraulic rotary filter screen cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810729879.1A CN108609834B (en) | 2018-07-05 | 2018-07-05 | Hydraulic rotary filter screen cylinder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108609834A CN108609834A (en) | 2018-10-02 |
| CN108609834B true CN108609834B (en) | 2024-06-04 |
Family
ID=63666209
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810729879.1A Active CN108609834B (en) | 2018-07-05 | 2018-07-05 | Hydraulic rotary filter screen cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108609834B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111087105B (en) * | 2020-03-19 | 2020-07-03 | 栢斯维(广州)信息科技有限公司 | Waste water treatment device for solid beverage production and manufacturing |
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| CN108609834A (en) | 2018-10-02 |
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