CN112755587B

CN112755587B - Distributor

Info

Publication number: CN112755587B
Application number: CN202011622908.8A
Authority: CN
Inventors: 王允飞; 王茂
Original assignee: Nantong Hongda Petrochemical Equipment Manufacturing Co ltd
Current assignee: Nantong Hongda Petrochemical Equipment Manufacturing Co ltd
Priority date: 2020-12-30
Filing date: 2020-12-30
Publication date: 2022-06-10
Anticipated expiration: 2040-12-30
Also published as: CN112755587A

Abstract

The invention discloses a distributor, comprising: the plate body is provided with a plurality of distribution units; the distribution unit penetrates through the plate body, a pressurizing cavity, a turbulent flow cavity, a jet flow cavity and a dispersion cavity are sequentially arranged in the distribution unit, a flow inlet is formed in one end, far away from the turbulent flow cavity, of the pressurizing cavity, a jet orifice is formed in one end, far away from the jet flow cavity, of the dispersion cavity, the jet flow cavity is further connected with a flow increasing channel, and the direction of the flow increasing channel is perpendicular to the turbulent flow cavity. The distributor provided by the invention has an excellent dispersion effect on liquid drops, the unevenness can be as low as 0.058, liquid can be uniformly distributed on the top of the packing layer, the amplification effect caused by poor liquid distribution is reduced, and the efficiency of packing and subsequent extraction is improved.

Description

Distributor

Technical Field

The invention belongs to the technical field of distributors, and particularly relates to a distributor for an extraction process.

Background

Liquid-liquid extraction is one of the important methods for chemical separation, and the separation or purification of each component is realized by utilizing the difference of the distribution ratio of a solute between two solvents which are not mutually soluble or partially mutually soluble. The extraction process is generally implemented in an extraction tower, wherein one solution (light phase liquid with lower density) continuously enters the extraction tower from the lower part of the extraction tower, flows towards the upper part of the extraction tower under the action of buoyancy, the other solvent (heavy phase liquid with higher density) continuously enters the extraction tower from the upper part of the extraction tower, flows towards the lower part of the extraction tower due to the action of gravity, fills the whole extraction tower, is dispersed in the continuous solvent, and one or more components in the solution are selectively dissolved in the continuous solvent through the contact between the solution and the solvent. The filler extraction tower is one of main devices for realizing the liquid-liquid extraction process, and has the main advantage that large-scale continuous production can be realized.

The extraction effect of the filler extraction tower is often in great relation with the effect of liquid dispersion in the tower, the design of the existing distributor is simple, a plurality of distribution holes and distribution grooves are only arranged on a distribution disc, the uniformity of liquid distribution of each liquid outflow port is difficult to ensure, the mass transfer efficiency of the extraction tower is influenced, the processing capacity of the extraction tower is restricted, and the separation efficiency of the extraction tower is lowered.

Disclosure of Invention

In order to solve the problems, the invention provides a distributor which distributes liquid more uniformly.

In order to achieve the technical effects, the invention adopts the following technical scheme:

a distributor comprises a plate body, wherein a plurality of distribution units are arranged on the plate body;

the distribution unit penetrates through the plate body, a pressurizing cavity, a turbulent flow cavity, a jet flow cavity and a dispersion cavity are sequentially arranged in the distribution unit, a flow inlet is formed in one end, far away from the turbulent flow cavity, of the pressurizing cavity, a jet orifice is formed in one end, far away from the jet flow cavity, of the dispersion cavity, the jet flow cavity is further connected with a flow increasing channel, and the direction of the flow increasing channel is perpendicular to the turbulent flow cavity.

In some embodiments, the position of the inlet protrudes from the plate body, and the outer edge of the inlet and the surface of the plate body form a circulation groove.

In some embodiments, the plate body is disc-shaped.

In some embodiments, the plate body has a diameter of 105mm to 355mm, preferably 355 mm.

In some embodiments, the inner diameter of the turbulence cavity is 3-5 mm, preferably 4 mm.

In some embodiments, the central axes of the turbulence cavities of adjacent distribution units are spaced apart by 20-28 mm, preferably 24 mm.

In some embodiments, the plate body is made of a tetrafluoroethylene polymer.

The invention has the beneficial effects that: the dispersion effect on liquid drops is excellent, the unevenness can reach 0.058 at least, the liquid can be uniformly distributed on the top of the packing layer, the amplification effect caused by poor liquid distribution is reduced, and the efficiency of packing and subsequent extraction is improved.

Drawings

FIG. 1 is a schematic top view of an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional elevation view of one embodiment of the present invention;

FIG. 3 is an enlarged schematic view of a portion of the distribution unit of FIG. 2;

FIG. 4 is a chart of data from the results of experiments conducted to determine the effect of plate diameter on non-uniformity in accordance with some embodiments of the present invention;

FIG. 5 is a graph of data from the results of experiments conducted to determine the effect of the inside diameter of a turbulator on non-uniformity in accordance with certain embodiments of the present invention;

FIG. 6 is a graph of data from the results of experiments conducted on the effect of axial spacing on non-uniformity in a turbulent chamber according to some embodiments of the present invention;

FIG. 7 is a chart of data from the results of a temperature versus non-uniformity effect experiment according to one embodiment of the present invention.

In the context of figures 1-3,

the plate comprises a plate body 10, a circulation groove 11, a distribution unit 20, a pressurizing cavity 21, a turbulent flow cavity 22, a jet cavity 23, a dispersing cavity 24, a flow inlet 25, a jet orifice 26 and a flow increasing channel 27.

Detailed Description

In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings.

As shown in fig. 1 to 3, a distributor includes a plate body 10, wherein a plurality of distribution units 20 are disposed on the plate body 10;

the distribution unit 20 penetrates through the plate body 10, a pressure increasing cavity 21, a turbulent flow cavity 22, a jet flow cavity 23 and a dispersion cavity 24 are sequentially arranged in the distribution unit, a flow inlet 25 is arranged at one end, far away from the turbulent flow cavity 22, of the pressure increasing cavity 21, a jet orifice 26 is arranged at one end, far away from the jet flow cavity 23, of the dispersion cavity 24, a flow increasing channel 27 is further connected to the part of the jet flow cavity 23, and the direction of the flow increasing channel 27 is perpendicular to the turbulent flow cavity 22.

Referring to fig. 3, the position of the inlet 25 protrudes from the plate body 10, and the outer edge of the inlet 25 and the surface of the plate body 10 form the circulation groove 11.

In this embodiment, the medium liquid passes through the distributor from the lower direction upwards, part of the medium large liquid drops enter the distribution unit 20 through the inflow port 25, and the surplus medium liquid enters the circulation groove 11 and flows circularly to enter the inflow ports 25 of other distribution units 20. The liquid drops enter the pressurizing cavity 21 through the inflow port 25, and the pressurizing cavity 21 is in a horn mouth shape with a narrow upper part and a wide lower part, so that the flow velocity of the liquid drops in the pressurizing cavity 21 is increased, the flow velocity increase of the liquid drops in different areas is different, and the trend of generating turbulence is generated. The liquid drops form turbulence after entering the turbulence cavity 22, and the liquid drops start to disperse gradually, and when the medium fluid flows out of the turbulence cavity 22, the liquid drops are already dispersed into a plurality of small liquid drops from large liquid drops. The fluid then enters the flow-increasing channel 27 from the jet chamber 23, and the droplets are dispersed to be finer under the squeezing action of the large external droplets. Finally, the fluid flows through the dispersion chamber 24 and enters the interior of the extraction tower section through the jet orifice 26, and the droplets are completely dispersed into a small particle state.

The embodiment has excellent dispersion effect on liquid drops, and the liquid can be uniformly distributed on the top of the packing layer, thereby reducing the amplification effect caused by poor liquid distribution and improving the efficiency of packing and subsequent extraction.

In this embodiment, the plate body 10 is provided in a disc shape so as to be used in conjunction with a general distillation column. Of course, the plate body 10 may be configured in other specific shapes according to different practical situations, and the invention is not limited thereto.

In this embodiment, the plate body 10 is made of a tetrafluoroethylene polymer, and the polytetrafluoroethylene is widely applied to various devices requiring acid-base resistance and organic solvent resistance, has no toxicity to human bodies, has non-sticky surface, can effectively prevent blockage of a distributor, enables the distributor to have good temperature resistance, still maintains good mechanical toughness within a temperature range of-196 to 250 ℃, and can be normally used.

Experimental part

Several distributors were made and tested, the structures of which were as described above and shown in fig. 1-3, but with some differences in part size. For comparative experiments, the major part size parameters of each experimental distributor are shown in the following table.

TABLE 1 dimensional parameters of the distributor for experiments

Numbering	Plate body diameter l/mm	Inner diameter d/mm of turbulent flow cavity	Turbulent cavity spacing lambda/mm
				1	355	4	24
2	355	4	20
				3	355	4	28
4	355	3	24
				5	355	5	24
6	230	4	24
				7	105	4	24

The interval of the turbulence cavities in the upper table is the distance between the central axes of the turbulence cavities of the adjacent distribution units.

The series of experiments take water and engine oil as experiment media, and the main experiment device comprises a distributor, an extraction tower section, a medium storage tank, a centrifugal pump and the like. During the experiment at every turn, the distributor of the same serial number is all installed to the top and the below of extraction tower festival, and the experiment medium is under the drive of centrifugal pump, through the pipeline of subsidiary flowmeter, gets into the extraction tower festival through the distributor respectively from top and below, and the extraction liquid gets into the liquid collecting barrel at last, and the flow of pipeline is controlled through flowmeter and ball valve. After about 20 minutes of operation, the dispersion effect of the distributor was determined based on the characteristics of the liquid in the liquid collection cartridge.

Experiment 1 experiment of influence of plate body diameter on unevenness

The number 1, the number 6 and the number 7 distributors are adopted for experiments, the measured data are shown in fig. 4, and according to a data chart, the larger the liquid inlet flow is, the lower the liquid unevenness is, and the better the dispersing effect of the distributors is; and when the inlet liquid flow is the same, the larger the plate body diameter l is, the better the dispersion effect of the distributor is, and the number 1 distributor with the plate body diameter of 355mm is the optimal example.

Experiment 2 experiment of influence of inner diameter of turbulent flow cavity on unevenness

No. 1, No. 4 and No. 5 distributors are used for experiments, the measured data are shown in FIG. 5, and according to a data chart, when the liquid inlet flow rates are the same, the larger the inner diameter d of the turbulence cavity is, the better the dispersion effect of the distributors is, and the No. 5 distributor with the inner diameter of the turbulence cavity being 5mm is the optimal example.

Experiment 3 experiment of influence of turbulent flow cavity spacing on unevenness

No. 1, No. 2 and No. 3 distributors are taken for experiments, the measured data are shown in FIG. 6, and according to a data chart, when the liquid inlet flow is small, the dispersing effect of the No. 2 distributor with the interval of the turbulent flow cavity being 20mm is the best, the dispersing effect of the No. 1 distributor with the interval of 24mm is the second best, and the dispersing effect of the No. 3 distributor with the interval of 28mm is the worst; however, when the liquid inlet flow reaches 1400ml/min, the dispersing effect of the distributor No. 2 does not increase or decrease, and the unevenness of the obtained liquid is only lower than that of the distributor No. 3 and higher than that of the distributor No. 1; when the liquid inlet flow is 1600ml/min, the liquid unevenness of the distributor No. 2 is even equivalent to that of the distributor No. 3, and the dispersion effect is inferior to that of the distributor No. 1. In general terms, the number 1 distributor with 24mm of turbulence cavity spacing is the most preferred example.

Experiment 4 experiment of the influence of temperature on unevenness

The number 5 distributor is used for carrying out experiments, medium liquid with different temperatures is introduced in each experiment, measured data are shown in fig. 7, according to a data chart, the higher the temperature is, the better the dispersion effect of the distributor is, but the unevenness difference at different temperatures is not large, and the unevenness difference is smaller and smaller along with the increase of the liquid inlet flow, so that the influence of the dispersion effect of the distributor disclosed by the invention on the temperature is small.

The experiment proves that the distributor provided by the invention has excellent dispersion effect on liquid drops, the unevenness can reach 0.058 at least, the dispersion effect can be ensured under the conditions of different medium temperatures or liquid inlet flow rates, the requirements on working conditions are not as strict as those of the existing distributor, and the application range is wider.

It will be apparent to those skilled in the art that various modifications may be made to the above embodiments without departing from the general spirit and concept of the invention. All falling within the scope of protection of the present invention. The protection scheme of the invention is subject to the appended claims.

Claims

1. A distributor for a packed extraction column, comprising:

the plate comprises a plate body (10), wherein a plurality of distribution units (20) are arranged on the plate body (10), the plate body (10) is disc-shaped, and the diameter of the plate body is 105-355 mm;

the distribution unit (20) penetrates through the plate body (10), a pressure increasing cavity (21), a turbulent flow cavity (22), a jet flow cavity (23) and a dispersion cavity (24) are sequentially arranged in the distribution unit, a flow inlet (25) is arranged at one end, far away from the turbulent flow cavity (22), of the pressure increasing cavity (21), the position of the flow inlet (25) protrudes out of the plate body (10), a circulation groove (11) is formed by the outer edge of the flow inlet (25) and the surface of the plate body (10), the inner diameter of the turbulent flow cavity (22) is 3-5 mm, the central axis of the turbulent flow cavity (22) of the adjacent distribution unit (20) is 20-28 mm apart,

one end of the dispersion cavity (24) far away from the jet cavity (23) is provided with a jet orifice (26), the jet cavity (23) is also connected with a flow increasing channel (27), and the direction of the flow increasing channel (27) is vertical to the turbulent flow cavity (22).

2. A distributor according to claim 1, wherein the plate body (10) has a diameter of 355 mm.

3. A distributor according to claim 1, wherein the internal diameter of the turbulence chamber (22) is 4 mm.

4. A distributor according to claim 1, wherein the turbulence chamber (22) median axes of adjacent distribution units (20) are spaced apart by 24 mm.

5. A distributor according to any one of claims 1 to 4, wherein the plate body (10) is made of tetrafluoroethylene polymer.