CN111715420A

CN111715420A - Inverted cyclone silt separator

Info

Publication number: CN111715420A
Application number: CN202010514187.2A
Authority: CN
Inventors: 魏群山; 刘晓静; 张凯; 张艳霞; 吴倩倩; 唐立朋; 黄满红; 乔锦丽; 申哲民
Original assignee: Shanghai Jiaotong University; Donghua University
Current assignee: Shanghai Jiaotong University; Donghua University; National Dong Hwa University
Priority date: 2020-06-08
Filing date: 2020-06-08
Publication date: 2020-09-29

Abstract

The invention provides an inverted cyclone silt separator which comprises a motor and a separation barrel, wherein the separation barrel is inverted, the motor is arranged in the center of the top of the separation barrel, a rotating shaft of the motor is connected with a stirring rod, the stirring rod extends into the separation barrel, and stirring blades are arranged at the bottom of the stirring rod; the upper part of the separation cylinder is provided with a feed inlet, the bottom of the separation cylinder is provided with a filter screen, a water outlet is arranged below the filter screen, and the water outlet is connected with a first peristaltic pump. Compared with the traditional separator such as a cyclone desander, the invention can really separate mud and sand or sand instead of only separating silt and water, and can be particularly used for separating silt in special mud (such as river sediment) with lower sand content, high organic matter content and higher viscosity, and can achieve the effect of separating sand with different particle sizes by changing the aperture of the screen mesh.

Description

Inverted cyclone silt separator

Technical Field

The invention relates to the field of sediment separation, in particular to an inverted cyclone sediment separator.

Background

The traditional silt separator (cyclone desander) utilizes the principles of centrifugal sedimentation and density difference to force the slurry to be separated to make rotary motion after entering the cyclone desander from the periphery under a certain pressure. The centrifugal force is different due to the different densities of the silt and the water. The coarse solid particles in the slurry move to the wall of the reactor against the hydraulic resistance and spirally move downwards along the wall of the reactor under the combined action of the gravity of the coarse solid particles and most of water, and the fine particles and most of water are subjected to small centrifugal force and do rotary motion along with the slurry before approaching the wall of the reactor. Finally, clear water with low density and fine particles rise and are discharged from the overflow port; the particles with high density are settled to the bottom and discharged from the sand discharge port, thereby achieving the aim of removing sand.

Therefore, the traditional silt separator is only suitable for separating two substances with large density difference, such as solid-liquid separation: silt is separated from water instead of sand from silt, and only larger solid particles can be separated from water, and fine particles cannot be separated from water. The sediment is more viscous, the density difference between the sediment and the sand is smaller, and particularly the fine sand with smaller grain diameter. The traditional silt separator is not suitable for separating the sand in the sediment. It is therefore desirable to redesign an apparatus suitable for silt separation.

Disclosure of Invention

The invention aims to provide an inverted cyclone silt separator which can effectively separate silt from sand and sand, particularly fine sand with small particle size.

The technical scheme adopted by the invention for solving the technical problem is as follows: an inverted cyclone silt separator comprises a motor and a separation barrel, wherein the separation barrel is inverted, the motor is arranged in the center of the top of the separation barrel, a rotating shaft of the motor is connected with a stirring rod, the stirring rod extends into the separation barrel, and stirring blades are arranged at the bottom of the stirring rod; the upper part of the separation cylinder is provided with a feed inlet, the bottom of the separation cylinder is provided with a filter screen, a water outlet is arranged below the filter screen, and the water outlet is connected with a first peristaltic pump.

Furthermore, a cover is arranged in the sorting barrel, is of a hollow table column type, is coaxial with the stirring rod and is arranged in the sorting barrel through a fixed lifting rope. The sand moves to the wall of the container under the action of centrifugal force and sinks after touching the inner wall of the cover.

Furthermore, a valve is arranged at the water outlet, a water outlet pipe is arranged in the separation cylinder, and the water outlet pipe sequentially penetrates through the middle part of the cover and the top of the separation cylinder to be connected with a second peristaltic pump.

Furthermore, the filter screen is arranged at the bottom of the separation cylinder, and a retaining ring is arranged on the filter screen.

Compared with the traditional separator, the invention can really separate mud, sand and sand instead of separating silt and water, and can achieve the effect of separating sand with different particle sizes by changing the aperture of the screen mesh.

Drawings

FIG. 1 is a schematic structural diagram according to a first embodiment;

fig. 2 is a schematic structural diagram of the second embodiment.

1. The device comprises a motor, 2, a feed inlet, 3, a separation barrel, 4, stirring blades, 5, a valve, 6, a first water outlet, 7, a first peristaltic pump, 8, a first water outlet, 9, a filter screen, 10, a retaining ring, 11, a cover, 12, a fixed lifting rope, 13, a water outlet pipe, 14, a second water outlet, 15 and a second peristaltic pump.

Detailed Description

The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.

The invention is mainly applied to the separation of silt and can also be used for the separation of silt.

Example one

As shown in fig. 1, the present embodiment includes a motor 1 and a separation cylinder 3, the separation cylinder 3 is an inverted type, the motor 1 is arranged at the center of the top of the separation cylinder 3, a stirring rod is connected to a rotating shaft of the motor 1, the stirring rod extends into the separation cylinder 3, and a stirring blade 4 is arranged at the bottom of the stirring rod; the upper part of the separation cylinder 3 is provided with a feed inlet 2, the bottom of the separation cylinder is provided with a filter screen 9, the filter screen 9 is fixed at the bottom of the separation cylinder 3 through a retaining ring 10, a water outlet 6 is arranged below the filter screen 9, and the water outlet 6 is connected with a first peristaltic pump 7. The cover 11 is arranged in the sorting barrel 3, the cover 11 is a hollow table column type and is coaxial with the stirring rod, the fixed lifting rope 12 is arranged in the sorting barrel 3, sand or sand moves towards the wall of the separator under the action of centrifugal force and sinks after touching the inner wall of the cover 11, and therefore sinking speed is increased.

The silt mixture gets into in the separation barrel 3 through feed inlet 2, and under the stirring effect of stirring vane 4, the centrifugal motion is done to silt mixture in separation barrel 3, controls centrifugal force's size through the rotational speed of adjusting stirring vane 4. The sand with relatively large particle size has higher density than the density of mud and water, and is stronger in centrifugal action in the stirring process, and can move towards the wall of the separator against resistance, when the sand meets the cover 11 or the inner wall of the separation cylinder 3 in the moving process, the centrifugal motion is forced to stop, and the sand is settled towards the periphery under the action of gravity and finally intercepted by the filter screen 9.

The fine sand and mud-water mixture continues to do centrifugal motion, but due to the action of the first peristaltic pump 7 at the lower water outlet 6, mud and water are pumped away from the lower water outlet 6 through the filter screen 9 and are discharged through the first water outlet 8, the fine sand is left on the filter screen 9 and is collected together with the coarse sand, and therefore the effect of separating silt is achieved. The sand with different particle sizes can be separated by changing the aperture of the filter screen 9.

Example two

As shown in fig. 2, the present embodiment is different from the first embodiment in that a valve 5 is disposed at a water outlet 6, a water outlet pipe 13 is disposed in the separation cylinder 3, and an upper portion of the water outlet pipe 13 sequentially passes through the middle portion of the cover 11 and the top portion of the separation cylinder 3 and is connected to a second peristaltic pump 15.

The silt separation mode of this embodiment is the characteristic that thereby utilizes the centrifugal action that the sand received to be bigger to the motion of sorting cylinder 3 inner wall, use second peristaltic pump 15 to pump away muddy water mixture from sorting cylinder 3 top through outlet pipe 13, and discharge through second apopore 14, sand is stayed in sorting cylinder 3, close valve 5 this moment, wait the liquid level to reduce to outlet pipe 13 mouth of pipe below, open valve 5, first peristaltic pump 7 is taken away remaining muddy water mixture and is discharged through first apopore 8 from the below, sand is stayed and is collected on filter screen 9, finally reach silt separation's purpose. Compared with the first embodiment, the method is suitable for separating sand or sand with larger particle size.

The above is only a specific embodiment of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent substitutions or modifications made based on the present invention to solve the same technical problems and achieve the same technical effects are within the scope of the present invention.

Claims

1. An inverted cyclone silt separator comprises a motor (1) and a separation barrel (3), and is characterized in that the separation barrel (3) is inverted, the motor (1) is arranged at the center of the top of the separation barrel (3), a rotating shaft of the motor (1) is connected with a stirring rod, the stirring rod extends into the separation barrel (3), and stirring blades (4) are arranged at the bottom of the stirring rod; sorting cylinder (3) upper portion is provided with feed inlet (2), and the bottom is provided with filter screen (9), filter screen (9) below is provided with delivery port (6), delivery port (6) are connected with first peristaltic pump (7).

2. An inverted cyclonic silt separator according to claim 1, wherein a shroud (11) is provided within the classifying drum (3), the shroud (11) being of a hollow pillar type, coaxial with the agitator arm, and being provided within the classifying drum (3) by a fixed lifting line (12).

3. The inverted cyclone silt separator according to claim 1 or 2, wherein a valve (5) is provided at the water outlet (6), a water outlet pipe (13) is provided in the separation cylinder (3), and the water outlet pipe (13) passes through the middle of the cover (11) and the top of the separation cylinder (3) and is connected with a second peristaltic pump (15).

4. An inverted cyclonic silt separator according to claim 1, wherein the screen (9) is located at the bottom of the drum (3), and the screen (9) is provided with a retaining ring (10).