Energy-saving horizontal spiral centrifuge with lateral liquid outlet device

Abstract

The utility model discloses an energy-saving type horizontal screw centrifuge with lateral liquid outlet devices. The energy-saving type horizontal screw centrifuge comprises a housing, a rotating drum is arranged in the housing, a screw propeller is arranged in the rotating drum, a large-end main shaft is arranged on the rotating drum, liquid outlets are formed in the large-end main shaft, and the lateral liquid outlet devices are arranged on the outer sides of the liquid outlets. The lateral liquid outlet device comprises a disc, a guide arc plate is fixed on the disc, an outlet is formed in the disc, an arc guide hole communicated with the outlet is formed in the guide arc plate, and a liquid outlet nozzle communicated with the arc guide hole is formed in the guide plate; the nozzle directions of the liquid outlet nozzles are uniformly distributed along the tangential direction of a circle, and the liquid outlet directions of the liquid outlet nozzles are consistent with the rotating direction of the rotary drum; and the tail end of the taper pipe of the rotary drum is provided with a group of slag discharge ports which are uniformly distributed along the center of the rotary drum. According to the utility model, the thrust direction and the rotation direction of liquid phase flow can be controlled to be the same, assistance is provided for rotation of the rotary drum, the problem that part of liquid phase substances erode the large-end main shaft and the shaft seat can be solved, and the device is worthy of popularization and application.

Description

Technical Field

[0001] The utility model relates to a centrifuge, in particular to a horizontal centrifuge, and more particularly to an energy-saving horizontal screw centrifuge with a lateral liquid discharge device. Background Art

[0002] Horizontal spiral sedimentation centrifuge is referred to as horizontal spiral centrifuge. It is a kind of efficient centrifugal separation equipment. The working principle of the centrifuge is as follows: the drum and the screw propeller rotate at high speed in the same direction with a certain differential speed. The material is continuously introduced into the inner cylinder of the screw propeller from the feed pipe, and enters the drum after acceleration. Under the action of the centrifugal field, the heavier solid phase is deposited on the drum wall to form a sediment layer. The screw propeller continuously pushes the deposited solid phase to the cone end of the drum and discharges it out of the machine through the slag discharge port. The lighter liquid phase forms an inner liquid ring, which continuously overflows the drum from the overflow port at the large end of the drum and is discharged out of the machine through the liquid discharge port.

[0003] Traditionally, the outlet of a horizontal screw centrifuge only needs to be opened to ensure that the liquid flows out of the centrifuge. Only the flow rate of the liquid phase when it flows out is considered, and the uncertainty of the liquid phase outflow direction is not considered. As a result, when the liquid phase outflow direction is opposite to the direction of rotation of the drum, the rotational resistance of the drum will increase, which will increase energy consumption. At the same time, the large end spindle, i.e., the component where the outlet is located, has not taken any protective measures other than the properties of the material itself (such as corrosion resistance, etc.). Long-term contact of the liquid with the surface of the large end spindle will cause its performance to decline, and the bearing seat component connected to the large end spindle is an important load-bearing component of the centrifuge. It does not have strict waterproof performance. The irregular outflow of liquid at the outlet will cause some water to enter the inside of the bearing seat (there is a gap between the large end spindle and the cover), destroying the oil film inside, which will aggravate the wear of the bearing seat component, greatly reducing its normal service life, and also greatly reducing the safety performance of the bearing seat and the load-bearing components of the whole machine, which may cause serious safety accidents.

[0004] The Chinese utility model patent CN 214183590 U discloses a high-dryness horizontal screw centrifuge, which includes a housing. A drum is rotatably connected inside the housing, and a screw propeller with a speed difference from the rotation of the drum is rotatably connected inside the drum. Both the drum and the screw propeller are driven to rotate by motors. The drum includes a pipe section and a second tapered pipe connected thereto, and the taper directions of the pipe section and the second tapered pipe are the same. The screw propeller includes a cylinder body, on which a first screw propelling blade and a second screw propelling blade continuous with the first screw propelling blade are spirally fixed. The outer contour of the first screw propelling blade is conical and is the same as the taper of the pipe section, and the outer contour of the second screw propelling blade is conical and is the same as the taper of the second tapered pipe. A cavity is provided on the cylinder body between the first screw propelling blade and the second screw propelling blade. A material inlet is provided on the cylinder body at the cavity, and a material inlet pipe is provided inside the cylinder body. The inner end of the material inlet pipe is provided with a feed outlet at the cavity. A liquid outlet is opened on the left end side of the drum at the first screw propelling blade, and a slag discharge port is opened on the right end side of the drum at the second screw propelling blade. The liquid outlet of this horizontal screw centrifuge only ensures the outflow of the liquid phase material from the centrifuge in the form of an opening, only considering the problem of the flow rate when the liquid phase material flows out, and not considering the uncertainty of the outflow direction of the liquid phase material, resulting in an increase in the rotational resistance of the drum when the outflow direction of the liquid phase material is opposite to the rotational direction of the drum, increasing the energy consumption, and moreover, it will cause corrosion to the large-end main shaft and the bearing seat, affecting the performance of the centrifuge. Summary of the Utility Model

[0005] The present utility model aims to solve the above-mentioned shortcomings of the prior art, and provides an energy-saving horizontal screw centrifuge with a lateral liquid outlet device that can control the thrust direction of the liquid phase material flowing out to be the same as the rotational direction, providing assistance for the rotation of the drum, and at the same time being able to solve the problems that part of the liquid phase material enters the bearing seat to damage the oil film and the long-term contact with the end face of the large-end main shaft reduces the service performance of the large-end main shaft, meeting the requirements of enterprises for being worry-free, labor-saving, and low-cost during production.

[0006] The technical solution adopted by the present utility model to solve its technical problems: This energy-saving horizontal screw centrifuge with a lateral liquid outlet device includes a housing. A rotating drum is rotatably connected inside the housing, and a screw propeller with a speed difference from the rotation of the rotating drum is rotatably connected inside the rotating drum. A large-end main shaft is fixed at the water outlet end of the rotating drum, and a set of liquid outlet ports evenly distributed along the center of the rotating drum are opened on the large-end main shaft. A lateral liquid outlet device fixed at the large-end main shaft is provided outside each liquid outlet port; the lateral liquid outlet device includes a disc, a guiding arc plate is fixed on the disc, an outlet is opened on the disc, an arc-shaped guiding hole communicating with the outlet is opened on the guiding arc plate, and a liquid outlet nozzle communicating with the arc-shaped guiding hole is opened on the guiding plate; the nozzle directions of each liquid outlet nozzle are evenly arranged along the tangent direction of the circle, the center surrounded by each liquid outlet nozzle is concentric with the rotation center of the rotating drum, and the liquid outlet direction of each liquid outlet nozzle is the same as the rotation direction of the rotating drum; a set of slag discharge ports evenly distributed along the center of the rotating drum are arranged at the end of the conical tube of the rotating drum. The function of the lateral liquid outlet device here is to control the thrust direction when the liquid phase flows out of the liquid outlet port and make it the same as the rotation direction of the rotating drum, preventing the thrust direction from being different and becoming a resistance to the operation of the centrifuge, increasing energy consumption. At the same time, the same liquid outlet direction also adds assistance to the operation of the centrifuge; in addition, the fixed liquid phase outflow direction makes the liquid phase not splash randomly, playing a good protective role for the important load-bearing components (bearing seat components) next to the liquid outlet port, preventing the liquid phase from entering the bearing seat components and damaging the internal oil film, resulting in increased wear and sharp reduction in life (as Figure 10 shown).

[0007] For further improvement, a stepped block is fixed at the bottom end of the liquid outlet nozzle. The function of the stepped block here is to prevent the liquid phase from directly contacting the end face of the large-end main shaft when flowing out, ensuring dryness and indirectly increasing the service life of the large-end main shaft and other related components.

[0008] For further improvement, a baffle that partially blocks the liquid outlet nozzle is fixed at the liquid outlet nozzle. The function of the baffle here is to enable the liquid phase to spray out from the lateral liquid outlet device with a certain spraying speed.

[0009] For further improvement, a slag discharge sleeve is fixed at each slag discharge port, and the top end of the slag discharge sleeve is higher than the outer contour of the rotating drum. The functions of the slag discharge sleeve and the top end of the slag discharge sleeve being higher than the outer contour of the rotating drum are to directly throw out the solid phase and avoid contact with the outer contour of the rotating drum, thereby being able to avoid the situation that the outer contour of the rotating drum is corroded after long-term use.

[0010] Further improvement is that a self-lubricating layer is provided on the outer contour of the spiral blade of the screw propeller. The function of the self-lubricating layer here is to enable the outer contour of the spiral blade to fit more closely to the inner wall of the drum. As a result, not only can the spiral blade drive the solid phase out of the drum more thoroughly, but also when the spiral blade touches the inner wall of the drum, the frictional resistance is small, the noise is low, the discharge efficiency of the solid phase of the material is higher, and it is avoided from staying on the inner wall of the drum. Here, the self-lubricating layer is made of tin bronze material.

[0011] Further improvement is that a covering block is fixed on the housing, a circular groove is formed on the covering block, and a circular ring plate matched with the circular groove is fixed on the large-end main shaft. The functions of the covering block, the circular groove, and the circular ring plate here are to be able to block the liquid phase as much as possible, avoid contacting the bearing seat, and prevent the problem of damaging its oil film.

[0012] The beneficial effects of the present utility model are:

[0013] 1). By using the side liquid discharging device, the thrust direction when the liquid phase flows out of the liquid discharging port can be controlled, and it is the same as the rotation direction of the drum, preventing the thrust direction from becoming the resistance to the operation of the centrifuge when it is different, increasing the energy consumption. At the same time, the same liquid discharging direction also adds power to the operation of the centrifuge;

[0014] 2). By using the side liquid discharging device, the flowing direction of the liquid phase can be such that the liquid phase will not splash randomly, which plays a very good protective role for the important load-bearing components (bearing seat components) next to the liquid discharging port, preventing the liquid phase from entering the bearing seat components and damaging the internal oil film therein, resulting in the situation of increased wear and sharp reduction in life;

[0015] 3). By using the slag discharging sleeve, it can be avoided that the solid phase contacts the outer contour of the drum when being thrown out, thus avoiding the corrosion of the outer contour of the drum by the solid phase;

[0016] 4). By using the covering block, the circular groove, and the circular ring plate, the liquid phase can be blocked to avoid the problem of contacting the bearing seat and damaging its oil film. Brief Description of the Drawings

[0017] Figure 1 is the structural schematic diagram of the present utility model;

[0018] Figure 2 is the structural schematic diagram of the area of the side liquid discharging device in the present utility model;

[0019] Figure 3 is the structural schematic diagram of the area of the slag discharging sleeve in the present utility model;

[0020] Figure 4 is Figure 1 the partial enlarged view of Area A of

[0021] Figure 5Isometric view of the lateral liquid outlet device area in the present utility model Figure 1 ;

[0022] Figure 6 Isometric view of the lateral liquid outlet device area in the present utility model Figure 2 ;

[0023] Figure 7 Isometric view of the lateral liquid outlet device in the present utility model Figure 1 ;

[0024] Figure 8 Isometric view of the lateral liquid outlet device in the present utility model Figure 2 ;

[0025] Figure 9 Isometric view of the lateral liquid outlet device in the present utility model Figure 3 ;

[0026] Figure 10 Schematic diagram of the spraying direction of each liquid outlet nozzle in the present utility model.

[0027] Explanation of reference numerals: housing 1, covering block 1-1, circular groove 1-1a, rotating drum 2, large-end main shaft 2a, circular ring plate 2a-1, liquid outlet 2-1, slag discharge port 2-2, lateral liquid outlet device 3, disc 3-1, guiding arc plate 3-2, arc-shaped guiding hole 3-2a, liquid outlet nozzle 3-2b, step block 3-3, baffle 3-4, self-lubricating layer 3-5, slag discharge sleeve 4, solid phase 5, liquid phase 6, bearing seat 7. Detailed implementation manners

[0028] The present utility model will be further described below with reference to the accompanying drawings:

[0029] Referring to the accompanying drawings: This energy-saving horizontal scroll centrifuge with a lateral liquid outlet device includes a housing 1, a rotating drum 2 rotatably connected inside the housing 1, and a screw propeller 3 rotatably connected inside the rotating drum 2 with a speed difference from the rotation of the rotating drum 2. The features are: a large-end main shaft 2a is fixed at the water outlet end of the rotating drum 2, a group of liquid outlets 2-1 are evenly arranged along the center of the rotating drum 2 on the large-end main shaft 2a, and a lateral liquid outlet device 3 fixed at the large-end main shaft 2 is provided outside each liquid outlet 2-1; the lateral liquid outlet device 3 includes a disc 3-1, a guiding arc plate 3-2 is fixed on the disc 3-1, an outlet 3-1a is opened on the disc 3-1, an arc-shaped guiding hole 3-2a communicating with the outlet 3-1a is opened on the guiding arc plate 3-2, and a liquid outlet nozzle 3-2b communicating with the arc-shaped guiding hole 3-2a is opened on the guiding plate 3-2; the spraying directions of the liquid outlet nozzles 3-2b are evenly arranged along the tangent direction of the circle, the center surrounded by the liquid outlet nozzles 3-2b is concentric with the rotation center of the rotating drum 2, and the liquid outlet directions of the liquid outlet nozzles 3-2b are the same as the rotation direction of the rotating drum 2; a group of slag discharge ports 2-2 are evenly arranged along the center of the rotating drum 2 at the tapered tube end of the rotating drum 2.

[0030] A step block 3-3 is fixed to the bottom end of the liquid outlet nozzle 3-2b.

[0031] A baffle 3-4 that partially blocks the liquid outlet nozzle 3-2b is fixed at the liquid outlet nozzle 3-2b.

[0032] A slag discharge sleeve 4 is fixed at each slag discharge port 2-2, and the top end of the slag discharge sleeve 4 is higher than the outer contour of the rotating drum 2.

[0033] A self-lubricating layer 3-5 is provided on the outer contour of the spiral blade on the screw propeller 3.

[0034] A covering block 1-1 is fixed on the housing 1. A circular groove 1-1a is formed in the covering block 1-1, and a circular ring plate 2a-1 that cooperates with the circular groove 1-1a is fixed on the large-end main shaft 2a.

[0035] The working principle of the present utility model: When the horizontal screw centrifuge operates, the rotating drum 2 and the screw propeller 3 rotate at a high speed in the same direction with a certain differential speed. The material is continuously introduced into the inner cylinder of the screw propeller 3 through the feed pipe, and after acceleration, it enters the rotating drum. Under the action of the centrifugal force field, the heavier solid phase 5 deposits on the wall of the rotating drum 2 to form a sediment layer. The screw propeller 3 continuously pushes the deposited solid phase 5 to the tapered end of the rotating drum 2 and discharges it out of the machine through the slag discharge sleeve 4. The lighter liquid phase 6 forms an inner liquid ring, continuously overflows from the liquid outlet 2-1 at the large end of the rotating drum 2, is accelerated through the guidance of the arc-shaped guiding hole 3-2a, and is pressurized through the blocking of the baffle 3-4, and thus is sprayed out from the liquid outlet nozzle 3-2b. Moreover, the thrust direction of the liquid phase 6 sprayed out from each liquid outlet nozzle 3-2b is the same as the rotation direction of the rotating drum 2, thereby adding power to the operation of the centrifuge (as Figure 10 shown); in addition, the controlled outflow direction of the liquid phase 6 prevents the liquid phase 6 from splashing randomly, and the liquid phase 6 does not contact the surface of the large-end main shaft 2a, so as to avoid the problem of deterioration of its service performance. Moreover, it plays a good protective role for the important load-bearing component (bearing seat 7) adjacent to the liquid outlet 2-1, preventing the liquid phase 6 from entering the bearing seat component and damaging the internal oil film, resulting in the problem of increased wear. Therefore, not only the maintenance cost of the centrifuge is low, but also it is more energy-saving, meeting the requirements of enterprises for production with ease, labor-saving, and low cost, and is worthy of popularization and application.

[0036] Although the present utility model has been illustrated and described by referring to the preferred embodiments, those of ordinary skill in the art should understand that various changes in form and details can be made within the scope of the claims.

Claims

1. An energy-saving horizontal scroll centrifuge with a lateral liquid discharging device, comprising a housing (1), a rotating drum (2) is rotatably connected inside the housing (1), and a screw propeller (3) with a speed difference from the rotation of the rotating drum (2) is rotatably connected inside the rotating drum (2), and it is characterized in that: A large-end main shaft (2a) is fixed at the water outlet end of the drum (2). A set of liquid outlet ports (2-1) evenly distributed along the center of the drum (2) are formed on the large-end main shaft (2a). A lateral liquid outlet device (3) fixed at the large-end main shaft (2) is provided outside each of the liquid outlet ports (2-1). The lateral liquid outlet device (3) includes a disc (3-1). A guiding arc plate (3-2) is fixed on the disc (3-1). An outlet (3-1a) is formed on the disc (3-1). An arc-shaped guiding hole (3-2a) communicating with the outlet (3-1a) is formed on the guiding arc plate (3-2). A liquid outlet nozzle (3-2b) communicating with the arc-shaped guiding hole (3-2a) is formed on the guiding plate (3-2). The nozzle directions of the liquid outlet nozzles (3-2b) are evenly arranged along the tangent direction of the circle. The center formed by the liquid outlet nozzles (3-2b) is concentric with the rotation center of the drum (2). The liquid outlet directions of the liquid outlet nozzles (3-2b) are consistent with the rotation direction of the drum (2). A set of slag discharge ports (2-2) evenly distributed along the center of the drum (2) are arranged at the end of the conical tube of the drum (2).

2. The energy-saving horizontal spiral centrifuge with a lateral liquid discharging device according to claim 1, wherein: A stepped block (3-3) is fixed at the bottom end of the liquid outlet nozzle (3-2b).

3. The energy-saving horizontal scroll centrifuge with a lateral liquid discharging device according to claim 2, wherein: A baffle plate (3-4) that partially blocks the liquid outlet nozzle (3-2b) is fixed at the liquid outlet nozzle (3-2b).

4. The energy-saving horizontal screw centrifuge with a lateral liquid discharging device according to claim 1, characterized in that: A slag discharge sleeve (4) is fixed at each of the slag discharge ports (2-2). The top end of the slag discharge sleeve (4) is higher than the outer contour of the drum (2).

5. The energy-saving horizontal scroll centrifuge with a lateral liquid discharge device according to claim 1, characterized in that: A self-lubricating layer (3-5) is arranged on the outer contour of the spiral blade of the screw propeller (3).

6. The energy-saving horizontal scroll centrifuge with a lateral liquid outlet device according to claim 1, wherein: A cover block (1-1) is fixed on the housing (1). A circular groove (1-1a) is formed on the cover block (1-1). A circular ring plate (2a-1) matched with the circular groove (1-1a) is fixed on the large-end main shaft (2a).

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