CN112295745A

CN112295745A - Horizontal screw machine feed arrangement structure

Info

Publication number: CN112295745A
Application number: CN202011009107.4A
Authority: CN
Inventors: 杨超; 高建生; 王存林; 卢仁伟; 李网芹; 陈鑫; 朱兆帅
Original assignee: CSSC Nanjing Luzhou Machine Co Ltd
Current assignee: CSSC Nanjing Luzhou Machine Co Ltd
Priority date: 2020-09-23
Filing date: 2020-09-23
Publication date: 2021-02-02

Abstract

The utility model provides a spiral shell machine feed arrangement structure crouches, including inlet pipe and the coaxial spiral mandrel that cup joints in the rotary drum, divide into flocculation district and feeding district in the spiral mandrel, the inlet pipe is by the coaxial double-deck pipeline structure who cup joints the constitution mutually of outside pipeline and inner tube, the flange is passed through to the one end of outside pipeline and links to each other with outside feed pipeline, the one end erection joint of flange is close to the outside pipeline, its other end evenly sets up two rows of through-holes along radial on the surface, the one end that outer pipeline was kept away from to the inner tube extends into the feeding district through the flocculation district, be equipped with the discharge gate in the circumference in feeding district, spiral mandrel installs helical blade in the circumference, be equipped with the through-hole in the circumference in flocculation district. The device can directly send the flocculating agent into the rotary drum to be fully mixed with the materials, and simultaneously adopts a concentric double-layer pipeline structure. The pipeline fracture caused by the resonance phenomenon caused by the fact that the natural frequency of the pipeline is close to the operation frequency of the horizontal screw machine is avoided.

Description

Horizontal screw machine feed arrangement structure

Technical Field

The invention belongs to the technical field of material transmission, and particularly relates to a feeding device structure of a horizontal screw machine.

Background

A horizontal spiral discharge settling centrifuge, called a horizontal screw machine for short, is processing equipment widely used in solid-liquid separation application. The working principle is that the rotary drum and the spiral pusher rotate at a high speed in the same direction at a certain difference of rotating speed, fluid suspended matters consisting of liquid and solid are continuously introduced into the spiral pusher through the feeding pipe, enter the rotary drum after being accelerated, heavy solid matters are deposited on the wall of the rotary drum to form a sediment layer under the action of centrifugal force, the spiral pusher continuously pushes the deposited solid matters to the conical end of the rotary drum and is discharged out of the machine through a slag outlet, and clear liquid generated along with the deposition continuously flows to the other end of the rotary drum and is discharged through an overflow port.

As a separation device, the horizontal screw relies primarily on particle size and density to achieve separation of solids from liquids. In some applications, such as sludge dewatering, the solid particles are too fine to separate by themselves, and it is necessary to add a flocculating agent to the material in order to change the electrochemical force on the surface of the particles, so that the fine solid particles agglomerate to form larger-sized flocs, thereby improving the settling performance and separation efficiency. When adding flocculants to the material, good mixing is necessary or an excess of polymer is required to ensure adequate flocculation. Typically, the flocculant is added upstream of the horizontal screw, for example, by being added to the material through a line mixer and mixed before entering the horizontal screw for separation. However, for high speed centrifuges it is often necessary to add the flocculant directly to the bowl to avoid flocculation too early which can lead to substantial breakdown of the flocs before settling begins, reducing the settling properties and separation efficiency of the material.

Disclosure of Invention

The technical problem to be solved by the invention is to overcome the defects of the prior art, and provide a horizontal screw machine feeding device structure, which can directly feed a flocculating agent into a rotary drum to be fully mixed with materials and simultaneously adopts a concentric double-layer pipeline structure. The pipeline fracture caused by the resonance phenomenon caused by the fact that the natural frequency of the pipeline is close to the operation frequency of the horizontal screw machine is avoided.

The invention provides a horizontal screw feeder structure, which comprises a feed pipe (8) and a spiral mandrel (2) coaxially sleeved in a rotary drum (1), wherein the spiral mandrel (2) is internally divided into a flocculation zone (15) and a feed zone (16), the feed pipe (8) is a concentric double-layer pipeline structure formed by coaxially sleeving an external pipeline (11) and an internal pipeline (14), one end of the external pipeline (11) is connected with the external feed pipeline through a flange (10), one end of the external pipeline (11), which is close to the flange (10), is provided with a joint (9), the other end of the external pipeline (11) is uniformly provided with two rows of through holes (13) along the radial surface, one end of the internal pipeline (14), which is far away from the external pipeline (11), extends into the feed zone (16) through the flocculation zone (15), a discharge hole (5) is arranged in the circumferential direction of the feed zone (16), and spiral blades are arranged in the circumferential direction of the, through holes (7) are formed in the circumferential direction of the flocculation area (15), and the through holes (7) are connected with a liquid pool (6) arranged between the rotary drum (1) and the spiral mandrel (2).

As a further technical scheme of the invention, a partition plate (3) is arranged in the feeding area (16), a group of accelerating blades (4) are radially and symmetrically arranged on the partition plate (3), and the accelerating blades (4) and the radial direction of the spiral mandrel (2) form an angle of 45 degrees.

Furthermore, an interlayer (12) is arranged between the outer pipeline (11) and the inner pipeline (14) which are coaxially sleeved.

Further, the outer pipe (11) is shorter in length than the inner pipe (14), and the outer pipe (11) is aligned with one end of the inner pipe (14) and connected to the outer feed pipe through the flange (10).

Furthermore, a partition plate is arranged between the flocculation area (15) and the feeding area (16).

The invention has the advantages that the flocculating agent is directly fed into the rotary drum to be fully mixed with the materials, so that the flocculation is prevented from being too early to cause a great amount of breakage of flocculates before the precipitation starts, and the sedimentation performance and the separation effect of the materials are influenced. The feeding pipe adopts a concentric double-layer pipeline structure, so that the natural frequency of the pipeline is improved, and the phenomenon that the feeding pipe is resonated to cause fracture and damage due to the fact that the operating frequency of the horizontal screw machine is close to the operating frequency of the horizontal screw machine is avoided.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Detailed Description

Referring to fig. 1, the present embodiment provides a horizontal screw feeder structure, which includes a feeding pipe 8 and a spiral mandrel 2 coaxially sleeved in a rotary drum 1, the spiral mandrel 2 is divided into a flocculation zone 15 and a feeding zone 16, the feeding pipe 8 is a concentric double-layer pipe structure formed by coaxially sleeving an external pipe 11 and an internal pipe 14, one end of the external pipe 11 is connected to the external feeding pipe through a flange 10, one end of the external pipe 11 close to the flange 10 is provided with a joint 9, the other end of the spiral mandrel is uniformly provided with two rows of through holes 13 on the surface along the radial direction, one end of the inner pipeline 14, which is far away from the outer pipeline 11, extends into a feeding area 16 through a flocculation area 15, a discharging hole 5 is arranged in the circumferential direction of the feeding area 16, spiral blades are arranged in the circumferential direction of the spiral mandrel 2, through holes 7 are arranged in the circumferential direction of the flocculation area 15, and the through holes 7 are connected with a liquid pool 6 arranged between the rotary drum 1 and the spiral mandrel 2.

A partition plate 3 is arranged in the feeding area 16, a group of accelerating blades 4 are radially and symmetrically arranged on the partition plate 3, and the angle between the accelerating blades 4 and the radial direction of the spiral spindle 2 is 45 degrees.

An interlayer 12 is arranged between the outer pipe 11 and the inner pipe 14 which are coaxially sleeved.

The outer pipe 11 is shorter in length than the inner pipe 14, and the outer pipe 11 is aligned with one end of the inner pipe 14 and connected to the outer feed pipe by the flange 10.

A partition plate is arranged between the flocculation zone 15 and the feeding zone 16.

The material to be separated enters an inner pipeline 14 from the outside through a flange 10 and enters a feeding area 16 in the spiral mandrel 2 along the inner pipeline 14, a group of accelerating blades 4 which are radially and symmetrically arranged on the partition plate 3 accelerate the material entering the feeding area 16 to the rotating speed of the rotary drum 1, and then the material enters a liquid pool 6 through a discharge hole 5 on the spiral mandrel 2. At the same time, the flocculant is passed from the joint 9 on the outer pipe 11 into the interlayer 12 between the outer pipe 11 and the inner pipe 14 and through two rows of radial through holes 13 on the outer pipe 11 into the flocculation zone 15 inside the spiral mandrel 2 and then through the through holes 7 on the spiral mandrel 2 into the liquid bath 6. The materials and the flocculating agent are fully mixed after entering the liquid pool 6, and fine solid particles in the materials form flocs with larger sizes, can quickly settle down and are pushed out of the machine by the spiral pusher, so that solid-liquid separation is completed.

The flocculating agent is directly sent into the rotary drum inside and fully mixes with the material, avoids mixing before entering the horizontal screw machine, and flocculation too early leads to a large amount of fractures just take place for the flocculate before the beginning of the sediment, influences the settlement performance and the separation effect of material. The feeding pipe adopts a concentric double-layer pipeline structure, so that the natural frequency of the pipeline is improved, and the phenomenon that the feeding pipe is resonated to cause fracture and damage due to the fact that the operating frequency of the horizontal screw machine is close to the operating frequency of the horizontal screw machine is avoided.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are intended to further illustrate the principles of the invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention, which is intended to be protected by the appended claims. The scope of the invention is defined by the claims and their equivalents.

Claims

1. The horizontal screw machine feeding device structure is characterized by comprising a feeding pipe (8) and a spiral mandrel (2) coaxially sleeved in a rotary drum (1), wherein the spiral mandrel (2) is internally divided into a flocculation zone (15) and a feeding zone (16), the feeding pipe (8) is a concentric double-layer pipeline structure formed by coaxially sleeving an external pipeline (11) and an internal pipeline (14), one end of the external pipeline (11) is connected with the external feeding pipeline through a flange (10), one end of the external pipeline (11), which is close to the flange (10), is provided with a joint (9), the other end of the external pipeline (11) is uniformly provided with two rows of through holes (13) on the surface along the radial direction, one end of the internal pipeline (14), which is far away from the external pipeline (11), extends into the feeding zone (16) through the flocculation zone (15), and a discharge hole (5) is formed in the circumferential direction of the feeding zone (16), spiral blades are arranged on the circumferential direction of the spiral mandrel (2), through holes (7) are formed in the circumferential direction of the flocculation area (15), and the through holes (7) are connected with a liquid pool (6) arranged between the rotary drum (1) and the spiral mandrel (2).

2. A horizontal screw feeder structure according to claim 1, characterized in that a partition plate (3) is arranged in the feeding area (16), a group of accelerating blades (4) are radially and symmetrically arranged on the partition plate (3), and the accelerating blades (4) form an angle of 45 degrees with the radial direction of the spiral mandrel (2).

3. A horizontal screw feeder structure according to claim 1, characterized in that an interlayer (12) is provided between the outer pipe (11) and the inner pipe (14) which are coaxially sleeved.

4. A horizontal screw feeder structure according to claim 1, characterized in that the outer pipe (11) is shorter in length than the inner pipe (14), the outer pipe (11) being aligned with one end of the inner pipe (14) and connected to the outer feed pipe by a flange (10).

5. A horizontal screw feeder structure according to claim 1, characterized in that a partition is provided between the flocculation zone (15) and the feeding zone (16).