CN216419795U - Overflow plate device and horizontal spiral discharge sedimentation centrifuge - Google Patents

Abstract

The utility model discloses an overflow plate device and a horizontal spiral discharging sedimentation centrifuge, which comprise a large end cover and a liquid level adjusting plate, wherein an overflow port is arranged on the large end cover; the liquid level adjusting plate is tightly pressed on the outer end face of the large end cover, and the upper surface of the horizontal plane of the L-shaped face is flush with the overflow port on the large end cover; and the liquid level adjusting plate and the outer end surface of the large end cover form an annular overflow channel. According to the utility model, the liquid level adjusting plate is arranged on the large end cover of the rotary drum, so that the length of the overflow dam is one circle of the radial ring of the overflow direction of the large end cover, the maximization of an overflow channel is ensured, the influence of the variable quantity of the feeding quantity on the separation effect is reduced, the separation precision is ensured, the adaptability of the practical application of the centrifugal machine is improved, and the liquid level adjusting plate is simple and convenient to replace and convenient to operate.

Description

Overflow plate device and horizontal spiral discharge sedimentation centrifuge

Technical Field

The utility model relates to the field of horizontal screw decanter centrifuges, in particular to an overflow plate device and a horizontal screw discharge decanter centrifuge.

Background

In the liquid drainage mode of the existing horizontal screw centrifuge (as shown in figure 1), 2 or more overflow ports which are equally distributed and distributed circumferentially are arranged on a large end cover of the centrifuge, and a liquid level adjusting plate is arranged on each overflow port. After the mixed slurry enters the rotary drum for concentration and separation, the total depth of the thick slurry and the thin slurry in a liquid pool in the rotary drum is H1, the mixed material forms a material interface after material layering due to different densities, at the moment, the depth of the thick slurry is H2, a baffle is mounted on the screw conveyor, the depth of the baffle is H3, the thick slurry after concentration and separation is discharged through a slag outlet, the thin slurry flows out through a liquid level adjusting plate tightly attached to a large end cover, the distance from an overflow port to the bottom of the rotary drum is H, and the overflow height delta H is H1-H. When the working rotating speed of the centrifuge is unchanged, the overflow height delta h of the centrifuge determines the liquid overflow flow rate, otherwise, the overflow flow rate determines the value delta h, and the treatment capacity of the centrifuge is the sum of the overflow port flow rate and the discharge capacity of the slag outlet. When the feeding amount is changed too much, the overflow height delta H is increased, H2 causing the depth of thick slurry is also increased, and when H2 is infinitely close to the overflow depth H, the two liquid phases with small density difference are easy to cause phase channeling, and the separation effect is influenced. Even if the delta H is too large, the total depth H1 of the liquid pool material is large, and a large pressure difference is formed, so that slurry flows through the baffle plate, and the phenomenon of dilution is caused.

In order to reduce the fluctuation range of Δ h, the conventional solution is: the size of the overflow ports on the large end cover of the rotary drum is increased or the number of the overflow ports is increased, so that the length L of the overflow channel is increased, the fluctuation range of delta h can be reduced, but the strength of the centrifugal machine is seriously influenced by increasing the size of the overflow ports or increasing the number of the overflow ports.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problems, the utility model aims to provide an overflow plate device and a horizontal spiral discharging sedimentation centrifuge. The device is installed in the big end cover outside, can increase overflow channel's length L, has reduced delta h's fluctuation range, has reduced the influence of feed volume change to the liquid level, has guaranteed that light and heavy liquid does not scurry the phase, has reduced the liquid level pressure differential in the rotary drum, has guaranteed separation precision.

The overflow plate device comprises a large end cover and a liquid level adjusting plate, wherein an overflow port is formed in the large end cover, the liquid level adjusting plate is integrally annular, and the cross section of the liquid level adjusting plate is L-shaped; the liquid level adjusting plate is tightly pressed on the outer end face of the large end cover, and the upper surface of the horizontal plane of the L-shaped face is flush with the overflow port on the large end cover; and the liquid level adjusting plate and the outer end surface of the large end cover form an annular overflow channel.

The utility model has the beneficial effects that: set up this level adjusting plate on the big end cover of rotary drum, make "overflow dam" length for the radial annular a week of big end cover overflow direction, guaranteed the overflow passageway maximize, reduced the adverse effect that the feed volume variation volume produced separation effect, reduce liquid level pressure difference in the rotary drum, guarantee to separate accurately, promoted centrifuge actual use's adaptability simultaneously, level adjusting plate is for hough the structure change portably moreover, convenient operation.

Further, the liquid level adjusting plate is of a half structure.

Further, liquid level regulating plate one side is the plane, and the another side is the stairstepping along the direction of radially keeping away from the axle center, and the step number is the one-level at least, and the direction thickness along radially keeping away from the axle center increases gradually.

Further, the number of stages of the liquid level adjusting plate is two.

Furthermore, 2 90-degree concave surfaces at the first-stage step and the second-stage step of the liquid level adjusting plate are smooth transition surfaces.

Further, install annular filter on the second step, annular filter's angle is 135 degrees, and annular filter is detachable the connection with second step mounting means.

Furthermore, the annular filter plate belongs to a half structure.

Further, the annular filter plate is in threaded connection with the second-stage step of the liquid level adjusting plate.

The utility model also provides a horizontal spiral discharging sedimentation centrifuge which comprises a spiral conveyor, a rotary drum, a baffle plate and a large end cover, wherein the large end cover is provided with any overflow plate device in the technical scheme.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the embodiments or the description of the prior art will be briefly described below.

FIG. 1 is a layout view of a horizontal decanter centrifuge equipped with a conventional level-adjusting plate of a conventional type;

FIG. 2 is a block diagram of a conventional overflow port and overflow plate;

FIG. 3 is a layout of a horizontal centrifuge incorporating the present invention;

fig. 4 is a partial enlarged view of a in fig. 3;

fig. 5 is a schematic structural diagram of the present invention.

Fig. 6 is a partially enlarged view of B in fig. 4.

Wherein the reference numbers referred to in the figures are as follows:

a large end cover 1; a general type liquid level adjusting plate 2; 3, thick slurry; slurry 4; a screw conveyor 5; a rotating drum 6; a baffle 7; a slag outlet 8; an overflow port 9; a liquid level adjusting plate 10; a first step 11; a secondary step 12; an annular overflow channel 13; half noodles 14; an annular filter plate 15.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1 to 6, an overflow plate device comprises a large end cover 1 and a liquid level adjusting plate 10, wherein an overflow port 9 is arranged on the large end cover 1, the liquid level adjusting plate 10 is annular as a whole, and the cross section of the liquid level adjusting plate is L-shaped; the liquid level adjusting plate 10 is tightly pressed on the outer end face of the large end cover 1, and the upper surface of the horizontal plane of the L-shaped face is flush with the overflow port 9 on the large end cover 1; the liquid level adjusting plate 10 and the outer end face of the large end cover 1 form an annular overflow channel 13. The arrangement of the liquid level adjusting plate 10 ensures the maximization of an overflow channel, reduces the adverse effect of the variable quantity of the feeding quantity on the separation effect, reduces the liquid level pressure difference in the rotary drum 6 and ensures the precision of separation.

In some embodiments, the liquid level adjusting plate 10 may adopt a structure in which the liquid level adjusting plate 10 is of a half structure, and the liquid level adjusting plate 10 may be separated into two semicircular plates from the middle, and the two separated parts are connected by screws. The arrangement of the half structure ensures that the overflow plate device is convenient to disassemble.

In some embodiments, the liquid level adjusting plate 10 may adopt a structure scheme that one side of the liquid level adjusting plate 10 is a plane, the other side of the liquid level adjusting plate is stepped along a direction radially away from the axis, the number of the steps is at least one, and the thickness of the liquid level adjusting plate is gradually increased along the direction radially away from the axis. The step surface is arranged so that the utility model can adapt to different use conditions, and different steps can be arranged according to requirements.

In some embodiments, the liquid level adjusting plate 10 may also adopt a structure in which the number of steps of the liquid level adjusting plate 10 is two, and 2 90-degree concave surfaces at the first-stage step 11 and the second-stage step 12 are smooth transition surfaces. The smooth transition surface can prevent residues from being accumulated at the step to cause the pollution of the separation liquid. The annular filter plate 15 arranged on the secondary step 12 also belongs to a half structure, and can filter liquid so as to prevent thick slurry 3 from flowing out. The arrangement of the steps of the liquid level adjusting plate 10 has the advantages that when the feeding amount of the centrifuge is large, liquid enters the annular channel in the secondary step 12 when the liquid level in the rotary drum rises, and the separation precision of the centrifuge can be ensured because the area of the annular channel is larger and the overflow height delta h is kept basically unchanged.

In some embodiments, the annular filter plate 15 may adopt a structure scheme that the angle of the annular filter plate 15 is 135 degrees, and the annular filter plate 15 is detachably connected with the second stage 12. The connection can be carried out through screws or through positioning pins. The setting of ring filter can further block thick liquid 4 from the overflow mouth outflow in the centrifuge drum 6, can filter centrifuge built-in material simultaneously, and the setting of 135's angle setting makes the convenient change of setting up of detachable huff structure, can change the filter plate in different apertures according to the material of difference, satisfies different operation requirements.

The working principle of the utility model is as follows:

after the mixed slurry enters the rotary drum 6 for concentration and separation, the total depth of the thick slurry 3 and the thin slurry 4 in a liquid pool in the rotary drum 6 is H1, the mixed material forms a material interface after being layered due to different densities, at the moment, the depth H2 of the thick slurry 3 is provided with a baffle 7 on the screw conveyor 5, the depth H3 of the baffle 7 is provided, the thick slurry 3 after concentration and separation is discharged through a slag outlet 8, and the thin slurry 4 flows out through a liquid level adjusting plate 10 tightly attached to the big end cover 1.

As shown in fig. 3-5, the level controlling plate 10 and the large end cover 1 form an annular overflow channel 13 (fig. 4), and the height H2 of the thick slurry 3 is flush with the second step 12 of the level controlling plate 10, while the thin slurry is above the second step 12 and flows out from the edge of the level controlling plate 10. The length L of the annular overflow channel 13 is a radial annular circle, so that the maximum overflow sectional area Smax is ensured, and the liquid flow of the overflow port 9 is maximum. Therefore, even if the flow of the fed materials is changed, the overflow height delta H is basically unchanged, a material interface is formed after the materials are layered, and the H2 of the depth of the thick slurry 3 is not close to the overflow depth H, so that the light and heavy liquids are prevented from channeling, the liquid level pressure difference in the rotary drum 6 is reduced, the discharge of the thin slurry 4 at the slag outlet 8 is avoided, and the purposes of controlling the liquid level and filtering are achieved.

The separation effect of centrifuge has been guaranteed to this embodiment, has improved centrifuge's throughput, and level adjusting plate 10 is changed conveniently, easy operation, has strengthened centrifuge's practicality, has synthesized the quality and the market competition that have promoted the product.

It will be apparent to those skilled in the art that various changes and modifications can be made without departing from the inventive concept thereof, and these changes and modifications can be made without departing from the spirit and scope of the utility model.

Claims (9)

1. An overflow plate device comprises a large end cover (1) and a liquid level adjusting plate (10), wherein an overflow port (9) is arranged on the large end cover (1), and the overflow plate device is characterized in that the liquid level adjusting plate (10) is integrally annular, and the cross section of the liquid level adjusting plate is L-shaped; the liquid level adjusting plate (10) is tightly pressed on the outer end face of the large end cover (1), and the upper surface of the horizontal plane of the L-shaped face is flush with the overflow port (9) on the large end cover (1); the liquid level adjusting plate (10) and the outer end surface of the large end cover (1) form an annular overflow channel (13).

2. An overflow plate arrangement according to claim 1, characterised in that the level-regulating plate (10) is of a huff-and-puff configuration.

3. An overflow plate device according to claim 1, wherein one side of the liquid level adjusting plate (10) is a plane, the other side is stepped along the direction radially away from the axis, the number of steps is at least one, and the thickness is gradually increased along the direction radially away from the axis.

4. An overflow plate arrangement according to claim 1, wherein the level adjustment plate (10) is two-stage in number.

5. An overflow plate arrangement according to claim 3, characterised in that the 2 90 degree concave surfaces at the level regulating plate (10) primary step (11) and secondary step (12) are smooth transition surfaces.

6. An overflow plate arrangement according to claim 5, wherein the annular filter plate (15) is mounted on the secondary step (12), the angle of the annular filter plate (15) is 135 degrees, and the annular filter plate (15) and the secondary step (12) are detachably connected.

7. An overflow plate arrangement according to claim 6, wherein the annular filter plate (15) is of a huff construction.

8. An overflow plate arrangement according to claim 6, wherein the annular filter plate (15) is screwed to the secondary step (12) of the level regulating plate (10).

9. A horizontal screw discharge decanter centrifuge comprising a screw conveyor, a bowl, a baffle, and a large end cap, wherein the large end cap is provided with an overflow plate device as claimed in any one of claims 1 to 8.

Images