阅读说明：本技术 一种双向进料的碟式离心机 (Disc centrifuge of two-way feeding ) 是由 张泽帮 董贺峰 万然 刘凤贵 刘绪儒 胡婕 刘松 冀红彬 于 2020-11-26 设计创作，主要内容包括：本发明实施例提供了一种双向进料的碟式离心机,涉及碟式离心机技术领域。通过将碟片束分为上下两层,对应上下两个进料孔进行混合液输送,在上下层碟片交界处采用一层无孔碟片作为分界,防止上下流体的混合,使各个碟片均匀的分配流量,充分发挥多层碟片的分离效用,从而提高碟式离心机的分离效率。其包括：进料口,所述进料口分为外层进料口和内层进料口；碟片分布从上到下依次为顶层碟片、上层碟片组、中间碟片、下层碟片组和底层碟片；还包括：转鼓、轻相向心泵、重相向心泵、轻相出口、重相出口和立轴。(The embodiment of the invention provides a bidirectional-feeding disk centrifuge, and relates to the technical field of disk centrifuges. The disc bundle is divided into an upper layer and a lower layer, mixed liquid is conveyed corresponding to the upper feeding hole and the lower feeding hole, and the boundary between the upper disc and the lower disc adopts a layer of non-porous disc as a boundary, so that the upper fluid and the lower fluid are prevented from being mixed, the flow of each disc is uniformly distributed, the separation effect of the multi-layer discs is fully exerted, and the separation efficiency of the disc centrifuge is improved. It includes: the feed inlet is divided into an outer layer feed inlet and an inner layer feed inlet; the disc distribution is sequentially a top layer disc, an upper layer disc group, a middle disc, a lower layer disc group and a bottom layer disc from top to bottom; further comprising: a rotary drum, a light phase centripetal pump, a heavy phase centripetal pump, a light phase outlet, a heavy phase outlet and a vertical shaft.)

1. A two-way feed disk centrifuge, comprising: the feed inlet is divided into an outer layer feed inlet and an inner layer feed inlet; the disc distribution is sequentially a top layer disc, an upper layer disc group, a middle disc, a lower layer disc group and a bottom layer disc from top to bottom; further comprising: a rotary drum, a light phase centripetal pump, a heavy phase centripetal pump, a light phase outlet, a heavy phase outlet and a vertical shaft;

wherein the bottom layer disc, the lower layer disc and the upper layer disc are all provided with neutral holes; the middle disc is a non-porous disc; the top layer disc is of a cavity structure, and a neutral hole is formed in the lower surface of the top layer disc; the inner diameter of the bottom layer disc, the lower layer disc, the upper layer disc and the middle disc is the same in size, and the inner diameter is fixedly connected with the distributor through a clamping groove structure; the top layer disc covers the four lower discs through the outer diameter; the outer feed port is communicated with the top disc, and realizes the circulation with the gap of the upper disc group through the neutral hole, the inner feed port is communicated with the inside of the distributor, and the fluid is guided into the bottom disc through the flow guide of the inner wall of the rotary drum and flows into the gap of the lower disc group through the neutral hole; the middle disc separates the fluid in the upper and lower discs, the space between the top disc and the rotary drum forms a heavy phase separation channel, the top of the separation channel is communicated with the heavy phase centripetal pump and finally flows out through the heavy phase outlet, the outer wall of the distributor and the inner wall of the top disc form a light phase separation channel, and the top of the separation channel is communicated with the light phase centripetal pump and finally flows out through the light phase outlet.

2. The disc centrifuge of claim 1, wherein the oil-water mixture enters the inside of the centrifuge through the outer layer feed port and the inner layer feed port, respectively, wherein the mixture at the outer layer feed port enters the top layer disc cavity along the outer layer flow channel, and enters the gap of the upper layer disc through the top layer neutral hole, the mixture at the inner layer feed port flows through the bottom layer neutral hole along the inner layer flow channel, enters the gap of the lower layer disc, the mixture entering the inner layer feed port and the outer layer feed port is separated by the middle disc, and the inner layer feed structure and the outer layer feed structure are respectively communicated with the lower layer disc group and the upper layer disc group, so as to realize uniform distribution of the gap flow of the.

3. The two-way feed disc centrifuge of claim 2, wherein the mixed liquid in the disc gaps is driven by the discs to perform centrifugal motion, and finally a stable oil-water interface is formed between the neutral hole and the vicinity, and the heavy phase water flows along the outer diameter direction of the discs and enters the heavy phase centrifugal pump through the heavy phase separation channel.

4. The bidirectional feed disc centrifuge of claim 3, wherein the centrifugal pump is a divergent structure capable of converting fluid kinetic energy into pressure potential energy, and the heavy phase water with a certain pressure flows out of the centrifuge through the heavy phase outlet.

5. The two-way feed disc centrifuge of claim 4, wherein the light phase oil flows along the inner diameter of the disc, enters the light phase centrifugal pump through the light phase separation channel, and exits the centrifuge along the light phase outlet.

6. The bidirectional feed disk centrifuge of claim 5, wherein the top disk is a hollow cavity structure.

Technical Field

The invention relates to the technical field of disk centrifuges, in particular to a disk centrifuge with bidirectional feeding.

Background

The disk centrifuge utilizes the principle that light and heavy liquid phases and solid phases which have different densities and are not mutually soluble have different settling velocities under the centrifugal action to achieve the purpose of separating and layering or settling solid particles. Due to the characteristics of high automation level, compact structure, small volume, high separation efficiency, strong continuous operation capability and the like, the method is widely applied to the fields of petrochemical industry, food processing, medicines, transportation, bioengineering and the like.

Referring to fig. 1, the existing disk centrifuge flows into the bottom space of the disk from the feeding pipe 7, the mixed liquid enters the bottom disk 8 through the neutral hole 6, and flows upward into the space of the disk 4, the heavy phase is thrown to the outer edge of the rotary drum 6 under the action of centrifugal force, flows out from the heavy phase outlet 10 through the heavy phase centripetal pump 1 along the heavy phase flow channel 3, the light phase flows in the inner radial direction along the disk 4, flows through the light phase centripetal pump 2 along the light phase flow channel to convert the kinetic energy into pressure potential energy, and finally flows out from the light phase outlet 9.

At present, the disk centrifuge in the prior art adopts a mode of feeding from the bottom of a disk, but the structural form has the problem of uneven flow distribution, and in combination with fig. 1, because a mixed liquid flows in from a neutral hole of a disk 8 at the bottom of the disk, the processing capacity of the disk at the lower layer close to a feed inlet is large, the distributed flow of the disk at the upper layer is small, and the numerical calculation result shows that for a centrifuge containing 186 layers of disks, about 70% of the processing capacity is distributed to 50 layers of disks at the lower layer by about 30%, so that the load of the disk at the lower layer is too heavy, the load of the disk at the upper layer is lighter, and the disk centrifuge is calculated by the principle of uniformly distributing the flow of the disks at each layer during design, so that the actual working process deviates greatly from the design value, the separation effect of the disks is not good for full play, and.

Disclosure of Invention

In order to solve the technical problems, the invention provides a bidirectional-feeding disk centrifuge, which divides a disk bundle into an upper layer and a lower layer, conveys mixed liquid corresponding to an upper feeding hole and a lower feeding hole, adopts a layer of non-porous disk as a boundary at the junction of the upper layer disk and the lower layer disk, prevents the mixing of upper fluid and lower fluid, enables each disk to distribute flow uniformly, fully exerts the separation effect of multiple layers of disks and further improves the separation efficiency of the disk centrifuge.

A bi-directional feed disk centrifuge comprising: the feed inlet is divided into an outer layer feed inlet and an inner layer feed inlet; the disc distribution is sequentially a top layer disc, an upper layer disc group, a middle disc, a lower layer disc group and a bottom layer disc from top to bottom; further comprising: a rotary drum, a light phase centripetal pump, a heavy phase centripetal pump, a light phase outlet, a heavy phase outlet and a vertical shaft;

wherein the bottom layer disc, the lower layer disc and the upper layer disc are all provided with neutral holes; the middle disc is a non-porous disc; the top layer disc is of a cavity structure, and a neutral hole is formed in the lower surface of the top layer disc; the inner diameter of the bottom layer disc, the lower layer disc, the upper layer disc and the middle disc is the same in size, and the inner diameter is fixedly connected with the distributor through a clamping groove structure; the top layer disc covers the four lower discs through the outer diameter; the outer feed port is communicated with the top disc, and realizes the circulation with the gap of the upper disc group through the neutral hole, the inner feed port is communicated with the inside of the distributor, and the fluid is guided into the bottom disc through the flow guide of the inner wall of the rotary drum and flows into the gap of the lower disc group through the neutral hole; the middle disc separates the fluid in the upper and lower discs, the space between the top disc and the rotary drum forms a heavy phase separation channel, the top of the separation channel is communicated with the heavy phase centripetal pump and finally flows out through the heavy phase outlet, the outer wall of the distributor and the inner wall of the top disc form a light phase separation channel, and the top of the separation channel is communicated with the light phase centripetal pump and finally flows out through the light phase outlet.

Preferably, the oil-water mixed liquid enters the centrifuge through the outer layer feed inlet and the inner layer feed inlet respectively, wherein the mixed liquid at the outer layer feed inlet enters the top layer disc cavity along the outer layer flow channel and enters the gap of the upper layer disc through the top layer neutral hole, the mixed liquid at the inner layer feed inlet flows through the bottom layer neutral hole along the inner layer flow channel and enters the gap of the lower layer disc, the mixed liquid entering the inner layer feed inlet and the outer layer feed inlet is separated at the middle disc, the lower layer disc group and the upper layer disc group are communicated through the inner layer feed structure and the outer layer feed structure respectively, and the uniform distribution of the.

The mixed liquid in the disc gaps is driven by the discs to perform centrifugal motion, a stable oil-water interface is finally formed between the neutral hole and the nearby neutral hole, and heavy-phase water flows along the outer diameter direction of the discs and enters the heavy-phase centrifugal pump through the heavy-phase separation channel.

Preferably, the centrifugal pump is a divergent structure, can convert fluid kinetic energy into pressure potential energy, and heavy phase water with certain pressure flows out of the centrifuge through a heavy phase outlet.

Wherein, the light phase oil flows along the inner diameter direction of the disc, enters the light phase centripetal pump through the light phase separation channel, and flows out of the centrifuge along the light phase outlet with certain pressure.

Preferably, the top disc is a hollow cavity structure.

According to the bidirectional-feeding disk centrifuge provided by the embodiment of the invention, the upper and lower disk groups are communicated through the inner and outer layered feeding structures, the two disks are separated at the middle disk, and the inner and outer layer feeding amount is adjusted by adjusting the size of the inner and outer layer feeding holes, so that the treatment amount of the upper and lower disks is adjusted. The working load of the lower layer of discs can be reduced, the use efficiency of the upper layer of discs can be improved, the discs with different heights can be uniformly distributed, and the disc working efficiency of the whole centrifuge can be improved.

Drawings

FIG. 1 is a schematic diagram of a disk centrifuge of the prior art;

fig. 2 is a schematic structural diagram of a bidirectional-feeding disk centrifuge according to an embodiment of the present invention.

Detailed Description

The following detailed description of embodiments of the invention refers to the accompanying drawings.

The embodiment of the invention provides a bidirectional-feeding disk type centrifuge which mainly comprises an outer layer feed inlet 11, an inner layer feed inlet 12, a top layer disk 16, an upper layer disk group 17, a middle layer disk 18, a lower layer disk group 19, a bottom layer disk 20, a rotary drum 25, a light phase centripetal pump 15, a heavy phase centripetal pump 14, a light phase outlet 20, a heavy phase outlet 13, a vertical shaft 29 and other accessories. The structure of the disk centrifuge is shown in fig. 2.

As shown in fig. 2, a bidirectional disk centrifuge comprises a feed inlet, which is divided into an outer layer feed inlet 11 and an inner layer feed inlet 12, the disks are distributed from top to bottom as a top layer disk 16, an upper layer disk 17, a middle disk 18, a lower layer disk 19 and a bottom layer disk 20, wherein the bottom layer disk, the lower layer disk and the upper layer disk are disks with neutral holes 27, the middle disk is a disk without holes, the top layer disk is a cavity structure, the lower surface of the top layer disk is provided with neutral holes 24, the inner and outer diameters of the four lower disks are the same, the inner diameter is tightly connected with a distributor 26 through a clamping groove structure, the top layer disk 16 covers the four lower disks through a larger outer diameter, the outer feed inlet 11 is communicated with the top layer disk 16, the gap between the top layer disk 17 is communicated through the neutral holes 24, the inner layer feed inlet 12 is communicated with the inside of, the fluid is guided into the bottom layer disc 20 by the flow guide of the inner wall of the rotary drum 25 and flows into the gap of the lower layer disc group 19 through the neutral hole 27, the fluid in the upper and lower layer discs is separated by the middle disc 18, the space part between the top layer disc 16 and the rotary drum 25 forms a heavy phase separation channel 22, the top of the separation channel is communicated with the heavy phase centripetal pump 14 and finally flows out through the heavy phase outlet 13, the outer wall of the distributor 26 and the diameter of the inner wall of the top layer disc 16 form a light phase separation channel 23, and the top of the separation channel is communicated with the light phase centripetal pump 15 and finally flows out through the light phase outlet 21.

The operation of the disk centrifuge is described below with typical oil-water separation conditions. The disc centrifuge of two-way feeding is started earlier, when this disc centrifuge reaches rated revolution, pours into the running water into centrifuge inside through the water filling port, when the moisture overflow appears in the heavy phase export, stops the water injection.

The oil-water mixed liquid respectively enters the interior of the centrifuge through the outer layer feed inlet 11 and the inner layer feed inlet 12, wherein the mixed liquid of the outer layer feed inlet 11 enters the cavity of the top layer disc 16 along the outer layer flow channel and enters the gap of the upper layer disc 16 through the top layer neutral hole 24, the mixed liquid of the inner layer feed inlet 12 flows through the bottom layer neutral hole 27 along the inner layer flow channel and enters the gap of the lower layer disc 19, the mixed liquid entering from the inner layer feed inlet and the outer layer feed inlet is separated in the middle disc 18, the lower layer disc group and the upper layer disc group are respectively communicated through the inner layer feed structure and the outer layer feed structure, the uniform distribution of the gap flow of the discs in the centrifuge is realized, the work load of the lower layer disc group 19.

The mixed liquid in the disc gap is driven by the disc rotating at high speed to do centrifugal motion, a stable oil-water interface 28 is finally formed near the neutral holes 27 and 24, heavy phase water flows along the outward radial direction of the disc and enters the heavy phase centripetal pump 14 through the heavy phase separation channel 22, the centripetal pump is of a gradually expanding structure, the kinetic energy of the fluid can be converted into pressure potential energy, the pressure of the fluid outlet is improved, and finally the heavy phase water with certain pressure flows out of the centrifuge through the heavy phase outlet 13.

The light phase oil flows along the inner diameter direction of the disc, enters the light phase centripetal pump 15 through the light phase separation channel 23, the conversion of kinetic energy into pressure potential energy is realized in the light phase centripetal pump, and the light phase oil with certain pressure flows out of the centrifuge along the light phase outlet 21.

By adopting a bidirectional feeding mode, through the distribution of the inner and outer layer feeding holes and the diversion of the inner and outer layer feeding space and the uniform distribution of the upper and lower layer disc groups, the processing capacity of discs with different heights in the disc centrifuge is relatively uniform, the workload of the lower layer disc group is reduced, the service efficiency of the upper layer disc group is improved, and the whole machine working efficiency of the disc centrifuge is improved.

According to the bidirectional-feeding disk centrifuge provided by the embodiment of the invention, the upper and lower disk groups are communicated through the inner and outer layered feeding structures, the two disks are separated at the middle disk, and the inner and outer layer feeding amount is adjusted by adjusting the size of the inner and outer layer feeding holes, so that the treatment amount of the upper and lower disks is adjusted. The working load of the lower layer of discs can be reduced, the use efficiency of the upper layer of discs can be improved, the discs with different heights can be uniformly distributed, and the disc working efficiency of the whole centrifuge can be improved.

It will be evident to those skilled in the art that the embodiments of the present invention are not limited to the details of the foregoing illustrative embodiments, and that the embodiments of the present invention are capable of being embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the embodiments being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Any reference sign in a claim should not be construed as limiting the claim concerned. Furthermore, it is obvious that the word "comprising" does not exclude other elements or steps, and the singular does not exclude the plural. Several units, modules or means recited in the system, apparatus or terminal claims may also be implemented by one and the same unit, module or means in software or hardware. The terms first, second, etc. are used to denote names, but not any particular order.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the embodiments of the present invention and not for limiting, and although the embodiments of the present invention are described in detail with reference to the above preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the embodiments of the present invention without departing from the spirit and scope of the technical solutions of the embodiments of the present invention.