CN112387427A

CN112387427A - Horizontal screw centrifugal machine

Info

Publication number: CN112387427A
Application number: CN202011398333.6A
Authority: CN
Inventors: 牟宇慧; 牟富君; 王斌
Original assignee: Jiangsu Juneng Machinery Co ltd
Current assignee: Jiangsu Juneng Machinery Co ltd
Priority date: 2020-12-04
Filing date: 2020-12-04
Publication date: 2021-02-23

Abstract

The invention discloses a horizontal screw centrifuge, wherein a screw conveyor is positioned in a rotary drum shell, a feeding pipe is communicated with an inner pipe of the screw conveyor, a discharge hole is formed in the inner pipe, a screw blade is fixed on the periphery of the inner pipe, a light phase outlet is positioned on an end cover at one side of the rotary drum shell, an isolation disc of a disc system is arranged between the screw blade at the tail end of the screw conveyor and the light phase outlet, the isolation disc is fixed with the screw conveyor, a flow channel is formed at one side of the isolation disc, which is close to the inner pipe, and a solid phase channel is formed between the isolation; the disc system is positioned between the separation disc and the light phase outlet and fixed with the rotary drum. The disc system is added between the rotary drum shell close to the light phase outlet and the inner pipe, so that tiny solid particles can be quickly separated from the liquid phase, the content of the tiny solid particles in the liquid is greatly reduced, a final clear liquid with higher purity can be obtained, the filtration treatment of the tiny solid particles is not needed in the subsequent process, and the centrifugal capacity of the centrifugal machine is improved.

Description

Horizontal screw centrifugal machine

Technical Field

The invention relates to the technical field of solid-liquid separation, in particular to a horizontal screw centrifuge.

Background

The horizontal screw centrifuge is a high-efficiency centrifugal device for solid-liquid separation, can be used for the centrifugal treatment process of sludge generated in the industrial and civil sewage treatment processes, and compared with a belt filter press, the horizontal screw centrifuge is widely used in the industrial field because the horizontal screw centrifuge has the characteristics of large treatment capacity, automatic operation, good dehydration effect and the like. Fig. 1, fig. 2 is current horizontal screw centrifuge structure, the rotary drum includes the main aspects of conical tip and tube-shape, tip and main aspects respectively with tip cover 2 and main aspects 8 fixed connection, inlet pipe 1 passes tip cover 2 and auger delivery ware's cavity inner tube 4 inside intercommunication, inner tube 4 periphery is fixed with helical blade 6, the discharge gate 3 has been seted up on the inner tube 4 that is close to inlet pipe 1, the separation channel 7 has been seted up on keeping away from a plurality of helical blade 6 of inlet pipe 1, slag phase export 12 has been seted up to 5 tip lower parts of rotary drum casing, the light phase export 9 has been seted up on the main aspects 8,

main aspects

8 and 5 fixed connection of rotary drum casing, rotary drum and auger delivery ware are by differential mechanism 10 control differential rotation. During operation, suspension to be separated is continuously conveyed into a hollow inner pipe 4 of a spiral conveyor through a feeding pipe 1, enters between a rotary drum shell 5 and the inner pipe 4 which rotate at a high speed through a discharge port 3 of the spiral conveyor, solid-phase particles quickly settle on the inner wall 11 of the rotary drum under the action of centrifugal force, the rotary drum and the spiral conveyor rotate in the same direction and at a different speed, the spiral conveyor pushes solid-phase particle sediments to a drying zone at the small end of the rotary drum, the sediments are further extruded and dehydrated through the thrust of the spiral conveyor and the bidirectional extrusion of centrifugal force components of the sediments, then the sediments are discharged from a sediment phase outlet 12 at the small end of the rotary drum, and separated clear liquid moves to a light phase outlet 9 through a separation channel 7 and finally is discharged from the light phase outlet 9. During actual work, when the existing horizontal screw separator is used for treating materials containing small solid particles, the treatment effect is poor, the small solid particles are difficult to separate and can be discharged along with a light phase, so that the solid content of the light phase is high, and a more precise centrifuge is required to be arranged in a subsequent treatment process to perform centrifugal separation on light liquid again.

Disclosure of Invention

The applicant aims at the defects that the existing equipment in the existing production cannot separate smaller solid particles in the liquid phase, the solid content in the light phase is higher, and the post-treatment process is required for filtering, and the like, and provides a horizontal screw centrifuge with a reasonable structure, so that the treatment capacity and treatment effect of the equipment on materials containing finer particles are enhanced, the finally obtained light phase has low solid content, the space required by the equipment can be saved, and the investment and operation cost can be reduced.

The technical scheme and the beneficial effects adopted by the invention are as follows:

a horizontal screw centrifuge, the helical conveyor locates in the shell of the tumbler, the feed pipe communicates with inner pipe of the helical conveyor, offer the discharge port on the inner pipe, the periphery of inner pipe is fixed with the helical blade, the light phase outlet locates on the end cap of one side of the tumbler shell, set up the separation disc of the disc system between helical blade and light phase outlet of the end of the helical conveyor, the separation disc is fixed with the helical conveyor, the separation disc offers the flow path close to one side of inner pipe, there is a solid phase channel between separation disc and inner wall of tumbler; the disc system is positioned between the separation disc and the light phase outlet and fixed with the rotary drum. The invention adds a disc system between the rotary drum shell and the inner pipe near the light phase outlet, the disc system rotates with the rotary drum except the separation disc, the separation disc rotates with the screw conveyer, the primary clear liquid entering the disc system quickly separates out tiny solid particles from the liquid phase under the action of huge centrifugal force field, the tiny solid particles are settled on the inner wall of the rotary drum of the horizontal screw centrifuge, and then the primary clear liquid is discharged out of the rotary drum through the screw conveyer, the disc group can reduce the settling distance, increase the settling area, and simultaneously improve the settling speed, so that the tiny solid particles are quickly separated. The content of the tiny solid particles in the liquid is greatly reduced after the primary clear liquid is separated by a disc system, so that the final clear liquid with higher purity can be obtained, and the filtering treatment of the tiny solid particles is not needed in the next procedure. The invention integrates the existing horizontal screw centrifuge and the disc system, realizes the beneficial effect of simplifying two processes of separating large granular solids and small granular solids into one process, and has the advantages of increasing the centrifuge capability of the centrifuge, reducing the occupied space of a plurality of processing machines, reducing the manufacturing cost, saving the production and operation cost and the like.

As a further improvement of the above technical solution:

the other side of the separation disc is provided with a folding part which is bent towards the direction of the end cover, and the solid phase channel is positioned between the folding part and the inner wall of the rotary drum. The collecting part can prevent the initial clear liquid entering the disc system from returning to leave the disc system without centrifugal filtration, and the solid phase channel is used for discharging the micro particles separated by the disc system from the disc system. Because the solid content in the primary clear liquid is lower, the solid phase thrown to the inner wall of the rotary drum has low concentration and good fluidity, so the primary clear liquid can not be accumulated and blocked at a solid phase channel and can easily move towards the direction of the screw conveyor; in addition, because the pressure in the screw conveyor is lower than that in the light phase channel, the solid phase always moves towards the screw conveyor, and is not easy to enter the light phase channel from the gap between the disc system and the large end cover.

The end cover is fixedly connected with the rotary drum shell, and the disc support of the disc system is fixedly connected with the end cover.

The flow channel is a plurality of holes uniformly distributed on the separation disc. The disc system is connected with the rotary drum through the fixed connection of the disc support and the end cover, so that the synchronous rotation of the disc system and the rotary drum is realized, on one hand, the filtering centrifugal force can be basically synchronous, the phenomenon of material flow rejection under the action of different centrifugal forces is prevented, on the other hand, the same driving mechanism can be used for driving rotation, and the arrangement of a driving source is saved.

The direction from the separation disc to the end cover is sequentially provided with a shunt disc and a disc group of the disc system, and the disc bracket comprises a shunt disc and a disc frame part. The liquid entering the disc system can move towards a uniform direction by the diversion disc of the disc system and uniformly flows into the disc group from the liquid distribution channel of the diversion disc. The flow channel is a plurality of circular holes uniformly distributed on the separation disc, so that liquid can uniformly enter the disc system.

The disc frame part is fixed on the end cover through a plurality of fasteners which are uniformly distributed; the disc set is composed of a plurality of disc sets, and the disc sets are detachable conical bodies. The disc group is composed of a plurality of groups of disc groups, and can separate finer granular solids to obtain light-phase liquid with higher purity.

The end cap is a conical end cap with a conical surface matching the disc. The end cover is matched with the shape of the disc to press the disc, and other pressing structures are not needed, so that the space required by the equipment is small.

The conical surface is tightly attached to the disc closest to the light phase outlet. The conical surface is tightly attached to the disc, so that solid residues in the solid phase channel can be prevented from entering the light phase channel from a gap between the conical surface and the disc system.

The disc closest to the light phase outlet is fully covered by the conical surface, and the disc is prevented from deforming or moving due to the fact that the disc is thinner (about 0.5mm of a single disc) and is fully covered and pressed by the conical surface.

A light phase channel is arranged between the disc group and the light phase outlet; a slag phase outlet is formed in the rotary drum shell; the bowl and auger are differentially rotated by a differential. The light phase channel is used for discharging filtered final clear liquid and providing a clear flow channel for the final clear liquid, and the slag phase outlet is used for discharging solid residues.

Drawings

Fig. 1 is a schematic structural view of a conventional decanter centrifuge.

Fig. 2 is an enlarged view of a portion a in fig. 1.

Fig. 3 is a schematic structural view of the decanter centrifuge of the present invention.

Fig. 4 is an enlarged view of a portion B in fig. 3.

In the figure: 1. a feed pipe; 2. a small end cap; 3. a discharge port; 4. an inner tube; 5. a drum housing; 6. a helical blade; 7. a separation channel; 8. a large end cap; 9. a light phase outlet; 10. a differential mechanism; 11. the inner wall of the rotary drum; 12. a slag phase outlet; 13. a flow channel; 14. a separator disc; 15. a liquid distribution channel; 16. a diverter tray; 17. a disc set; 18. a disc frame part; 19. a light phase channel; 20. a solid phase channel; 21. a gathering part.

Detailed Description

The following describes embodiments of the present invention with reference to the drawings.

As shown in fig. 3, the decanter centrifuge of the present invention adds a disc system between the drum housing 5 and the inner tube 4 near the light phase outlet 9 based on the conventional decanter centrifuge shown in fig. 1.

As shown in fig. 4, a separating disc 14 of a disc system is arranged on one side of the helical blade 6 at the tail end of the screw conveyor, which is close to the large end cover 8, the separating disc 14 is fixed on the inner pipe 4 of the screw conveyor, a flow channel 13 is formed on one side of the separating disc 14, which is close to the inner pipe 4, the flow channel 13 is a plurality of circular holes uniformly distributed on the separating disc 14, and a light phase obtained by separation by a horizontal decanter centrifuge enters the disc system from the flow channel 13 for secondary centrifugal separation. The other side of the separation disc 14 is provided with a furling part 21 which is bent towards the direction of the large end cover 8, the furling part 21 can prevent the primary clear liquid entering the disc system from returning to the disc system without centrifugal filtration, a solid phase channel 20 is arranged between the end part of the furling part 21 and the inner wall 11 of the rotary drum, and the solid phase channel 20 is used for discharging the tiny particles separated by the disc system from the disc system.

As shown in fig. 4, a diverter disc 16 and a disc set 17 of the disc system are sequentially arranged from the separation disc 14 to the large end cover 8, a liquid distribution channel 15 is formed at the end of the diverter disc 16, the diverter disc 16 and the disc set 17 are both umbrella-shaped and arranged in parallel, and the opening faces the separation disc 14; the disc holder comprises a shunt disc 16 and an annular disc frame part 18, and a disc group 17 is fixed on the periphery of the disc frame part 18. The disc set 17 is formed by a plurality of disc sets arranged in parallel, and the disc sets are all detachable conical bodies. The large end cover 8 is a conical end cover, the inner part of the end cover is provided with a corresponding conical surface according to the specific position of the disc arrangement, and the conical surface is tightly attached to the disc closest to the light phase outlet 9, so that a solid phase can be prevented from entering the light phase channel 19; the tapered surface of the large end cover 8 fully covers and presses the disc closest to the light phase outlet 9, and the disc is prevented from deforming or moving due to the fact that the disc is thin (about 0.5mm of a single disc), and the tapered surface fully covers and presses the disc. A light phase outlet 9 is arranged in the center of the large end cover 8, and a light phase channel 19 is arranged between the disc and the light phase outlet 9. The disc holder portion 18 has a connecting portion fixed to the large end cover 8 by a plurality of fasteners uniformly distributed.

When the invention works, materials enter an inner pipe 4 of a screw conveyor from a feeding pipe 1, then enter a space between a rotary drum shell 5 and the inner pipe 4 which rotate at a high speed from a discharge port 3 of the screw conveyor, solid-phase particles quickly settle on an inner wall 11 of the rotary drum, the separated primary clear liquid moves to a disc system through a separation channel 7, the final primary clear liquid enters the disc system from a flow channel 13 of the disc system, and a disc frame part 18 is fixed on a large end cover 8, so that the disc system rotates with the rotary drum except for a separation disc 14, the separation disc 14 rotates with the screw conveyor, the primary clear liquid enters a disc group 17 from a liquid distribution channel 15 under the action of centrifugal force, and under the action of strong centrifugal force generated by high-speed rotation, a fine-particle slag phase is separated from the clear liquid and thrown onto the inner wall 11 of the rotary drum, and moves to enter a space where a helical blade 6 of the screw conveyor along the inner wall 11 of the rotary, the spiral conveyor pushes the solid-phase particle sediment to a drying area at the small end of the rotary drum, and the sediment is further extruded and dehydrated through the bidirectional extrusion of the pushing force of the spiral conveyor and the centrifugal component force of the sediment, and then is discharged from a sediment phase outlet 12 at the small end of the rotary drum. Because the solid content in the primary clear liquid is lower, the solid phase thrown onto the inner wall 11 of the rotary drum has low concentration and good fluidity, so the solid phase channel 20 cannot be accumulated and blocked and can easily move towards the direction of the screw conveyor; in addition, since the pressure in the screw conveyor is lower than the pressure in the light phase passage 19, the solid phase always moves in the direction of the screw conveyor, and does not easily enter the light phase passage 19 from the gap between the disk system and the large end cap 8. The final clear liquid moves along the disc system inwardly against the disc shelf 18 and finally into the light phase channel 19 for discharge from the light phase outlet 9.

According to the invention, the disc system is additionally arranged between the rotary drum shell 5 close to the light phase outlet 9 and the inner pipe 4, the disc system rotates along with the rotary drum except for the isolation disc 14, the isolation disc 14 rotates along with the screw conveyor, under the action of a huge centrifugal force field, the primary clear liquid entering the disc system is quickly separated from a liquid phase and is settled on the inner wall 11 of the rotary drum of the horizontal screw centrifuge, then the primary clear liquid is discharged out of the rotary drum through the screw conveyor, the disc group 17 can reduce the settling distance and increase the settling area, and meanwhile, the settling speed can be improved, so that the small solid particles are quickly separated. The content of the tiny solid particles in the liquid is greatly reduced after the primary clear liquid is separated by a disc system, so that the final clear liquid with higher purity can be obtained, and the filtering treatment of the tiny solid particles is not needed in the next procedure. The invention integrates the existing horizontal screw centrifuge and the disc system, realizes the beneficial effect of simplifying two processes of separating large granular solids and small granular solids into one process, and has the advantages of increasing the centrifuge capability of the centrifuge, reducing the occupied space of a plurality of processing machines, reducing the manufacturing cost, saving the production and operation cost and the like.

The foregoing description is illustrative of the present invention and is not to be construed as limiting thereof, as the invention may be modified in any manner without departing from the spirit thereof. For example, the flow channel 13 may be a square hole, an elliptical hole, a triangular hole or other special-shaped holes uniformly distributed on the separation disc 14, as long as the primary cleaning solution can uniformly enter the disc system for secondary filtration.

Claims

1. The utility model provides a spiral shell centrifuge crouches, inside auger delivery was located rotary drum casing (5), inlet pipe (1) and auger delivery's inner tube (4) intercommunication, has seted up discharge gate (3) on inner tube (4), and inner tube (4) periphery is fixed with helical blade (6), and light phase export (9) are located the end cover of rotary drum casing (5) one side, its characterized in that: a separation disc (14) of a disc system is arranged between a spiral blade (6) at the tail end of the spiral conveyor and the light phase outlet (9), the separation disc (14) is fixed with the spiral conveyor, a flow channel (13) is arranged on one side of the separation disc (14) close to the inner pipe (4), and a solid phase channel (20) is arranged between the separation disc (14) and the inner wall (11) of the rotary drum; the disc system is positioned between the separation disc (14) and the light phase outlet (9), and the disc system is fixed with the rotary drum.

2. A decanter centrifuge as defined in claim 1, wherein: the other side of the separation disc (14) is provided with a folding part (21) which is bent towards the end cover direction, and the solid phase channel (20) is positioned between the folding part (21) and the inner wall (11) of the rotary drum.

3. A decanter centrifuge as defined in claim 1, wherein: the end cover is fixedly connected with the rotary drum shell (5), and the disc support of the disc system is fixedly connected with the end cover.

4. A decanter centrifuge as defined in claim 1, wherein: the flow passage (13) is a plurality of holes which are uniformly distributed on the separation disc (14).

5. A decanter centrifuge as defined in claim 1, wherein: a diverter disc (16) and a disc group (17) of the disc system are arranged in sequence from the separation disc (14) to the end cover, and the disc support comprises a diverter disc (16) and a disc frame part (18).

6. A decanter centrifuge as defined in claim 5, wherein: the disc frame part (18) is fixed on the end cover through a plurality of fasteners which are uniformly distributed; the disc set (17) is composed of a plurality of disc sets which are detachable cones.

7. A decanter centrifuge as defined in claim 1, wherein: the end cap is a conical end cap with a conical surface matching the disc.

8. A decanter centrifuge as defined in claim 7, wherein: the conical surface is tightly attached to the disc closest to the light phase outlet (9).

9. A decanter centrifuge as defined in claim 7, wherein: the conical surface covers the disc closest to the light phase outlet (9).

10. A decanter centrifuge as defined in claim 1, wherein: a light phase channel (19) is arranged between the disc group (17) and the light phase outlet (9); a slag phase outlet (12) is formed in the rotary drum shell (5); the bowl and auger are differentially rotated by a differential (10).