CN1233468C - Sedimentation type centrifugal separator possessing double stage of drum and double stage of unloading spiral - Google Patents

Abstract

A decanter centrifuge with two-stage drum and two-stage screw discharge, mainly composed of a motor, a feeding device, a two-stage material accelerator, a two-stage drum, a two-stage screw conveyor and a differential, the material The two-stage drum is accelerated to rotate, and the solid and liquid phases are separated. Under the action of the differential, the two-stage screw conveyor pushes the separated solid phase out at a speed slightly higher or slightly lower than that of the drum, and the liquid phase It overflows from the overflow hole at the big end of the primary and secondary drums. After the materials are separated by two-stage centrifugal sedimentation, the liquid content of the solid phase after separation can be reduced, the application field is expanded, and it has great practical value and social and economic benefits.

Description

A decanter centrifuge with two-stage drum and two-stage screw discharge

(1) Technical field

The patent of the invention belongs to the spiral discharge sedimentation centrifuge, especially a two-stage spiral discharge centrifugal sedimentation separation structure and a material accelerator device, which are suitable for the solid-liquid mixture that needs to be centrifugally separated and the dryness of the solid phase after separation is required. higher occasions.

(2) Background technology

Before the patent of the present invention was made, the prior art screw discharge sedimentation centrifuge mainly consisted of a motor 1, a feeding device 2, a main bearing 3, a screw bearing 4, a primary drum 6, a primary screw conveyor 7, a differential Speed gear 11 and automatic control device 12 are formed. Its working principle is: the motor 1 drives the primary drum 6 and the secondary drum 9 to rotate at high speed through the transmission belt, and under the action of the differential 11 and the automatic control device 12, the primary screw conveyor 7 is slightly higher ( or slightly lower) than the rotational speed of the drum, and rotate at a high speed in the same direction as the drum; the solid-liquid mixture to be separated enters the primary drum 6 through the feeding device 2, and under the action of the centrifugal force field, the liquid in the inner ring of the liquid layer The phase overflows from the overflow hole at the large end of the primary drum 6, and the solid phase that is close to the inner wall of the drum is pushed out of the machine by the primary screw conveyor 7, thereby realizing the separation of solid and liquid phases. The disadvantages are: 1. Due to the limitation of the structure, the solid phase after preliminary separation has a short residence time in the conical drum, and the solid phase cannot be effectively dehydrated, so that the moisture content of the separated solid phase is high, which is difficult for materials that are difficult to separate. , it is difficult to meet the requirements of the production process; 2. In the traditional one-stage centrifugal sedimentation centrifuge, the dehydration of the solid phase is mainly carried out in the cone section of the one-stage drum. Since the diameter of the cone section drum is gradually reduced, that is, the solid phase is dehydrated. The centrifugal force on the phase material is also gradually reduced, which is also a main reason why the solid phase cannot be effectively dehydrated; 3. If two traditional one-stage centrifugal sedimentation centrifuges are used in series, due to the dehydration after one-stage separation The solid phase can no longer flow, and the solid phase cannot be input into the second centrifuge to continue dehydration; 4. The traditional one-stage centrifugal sedimentation centrifuge does not have a material centrifugal accelerator, and the material to be separated is from the outlet of the screw conveyor cylinder to the close-to The distance between the inner surface of the liquid layer on the drum wall is large, that is, the centrifugal force difference on the material is large, and it is easy to disturb the centrifugal sedimentation liquid pool, which has a great impact on the separation process, resulting in a high solid content in the separation liquid. .

(3) Contents of the invention

The task of the patent of the present invention is to overcome the shortcomings of the prior art and provide a solid-liquid separation machine with reasonable structure, good separation performance, high solid content in the solid phase after separation, and automatic control and protection according to the load.

A solid-liquid separation machine with a material accelerator and a two-stage spiral unloading centrifugal sedimentation separation structure, mainly composed of a motor 1, a feeding device 2, a main bearing 3, a screw bearing 4, a primary material accelerator 5, and a primary drum 6. The primary screw conveyor 7, the secondary material accelerator 8, the secondary drum 9, the secondary screw conveyor 10, the differential 11 and the automatic control device 12, the motor 1 drives the primary drum through the transmission belt 6 and the secondary drum 9 rotate at a high speed, and under the action of the differential 11 and the automatic control device 12, the primary screw conveyor 7 and the secondary screw conveyor 10 are slightly higher (or slightly lower) than the rotary drum. The speed rotates in the same direction as the drum at a high speed to achieve two-stage centrifugal sedimentation separation.

Compared with the prior art, the patented device of the present invention has reasonable structure, good separation performance, high solid content in the solid phase after separation, automatic control and protection according to the load, and has great implementation value and social and economic benefits.

(4) Description of drawings

Fig. 1 is a structural schematic diagram of a solid-liquid separation machine with a material accelerator and a double-stage spiral unloading centrifugal sedimentation separation structure.

Among them, 1-motor, 2-feeding device, 3-main bearing, 4-screw bearing, 5-first-level material accelerator, 6-first-level drum, 7-first-level screw conveyor, 8-second-level material accelerator, 9-secondary drum, 10-secondary screw conveyor, 11-differential, 12-automatic control device.

Figure 2 is a schematic diagram of the structure of the material accelerator.

Among them, 13-material acceleration blade, 15-material guide blade, 14-accelerator ring plate.

(5) Specific implementation methods

Fig. 1, Fig. 2 are an embodiment of the patent of the present invention. As shown in Figure 1 and Figure 2, the embodiment of the patent of the present invention is: a solid-liquid separation machine with a material accelerator and a two-stage spiral unloading centrifugal sedimentation separation structure, including a motor 1, a feeding device 2, a main Bearing 3, screw bearing 4, primary material accelerator 5, primary drum 6, primary screw conveyor 7, secondary material accelerator 8, secondary drum 9, secondary screw conveyor 10, differential 11 and An automatic control device 12, wherein the primary and secondary material accelerators 5 and 8 are each composed of material accelerating blades 13, material guide blades 15, and accelerator ring plates 14. Its characteristic is that after the material to be separated is accelerated by the material accelerator, the peripheral velocity close to that of the inner ring of the liquid layer can be obtained, which reduces the disturbance to the centrifugal sedimentation liquid pool; High, reasonable structure, good separation effect, and great implementation value.

Claims (1)

1, a kind of sedimentation-type centrifuge with twin-stage rotary drum and two-stage screw discharging, mainly by motor (1), feed arrangement (2), base bearing (3), screw bearing (4), one stage material accelerator (5), one-level rotary drum (6), one-level auger conveyor (7), two stage material accelerators (8), secondary rotary drum (9), deuterostrophies conveyer (10) and differential mechanism (11) are formed, it is characterized in that one-level rotary drum (6) and secondary rotary drum (9) are installed on the base bearing (3), one-level auger conveyor (7) and deuterostrophies conveyer (10) are assemblied in respectively in one-level rotary drum (6) and the secondary rotary drum (9) by screw bearing (4), one stage material accelerator (5) is set in one-level auger conveyor (7), two stage material accelerators (8) are set in deuterostrophies conveyer (10), one stage material accelerator (5) and two stage material accelerators (8) are by material speeding-up blade (12), material guide vane (13) and accelerator ring flat-plate (14) are formed, and differential mechanism (11) is connected with deuterostrophies conveyer (10) with one-level auger conveyor (7) by output shaft.

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