CN115487698B - High-pressure vortex efficient separation method for pollutants in soil - Google Patents
High-pressure vortex efficient separation method for pollutants in soil Download PDFInfo
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- CN115487698B CN115487698B CN202211065138.0A CN202211065138A CN115487698B CN 115487698 B CN115487698 B CN 115487698B CN 202211065138 A CN202211065138 A CN 202211065138A CN 115487698 B CN115487698 B CN 115487698B
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- 239000002689 soil Substances 0.000 title claims abstract description 143
- 238000000926 separation method Methods 0.000 title claims abstract description 72
- 239000003344 environmental pollutant Substances 0.000 title claims abstract description 43
- 231100000719 pollutant Toxicity 0.000 title claims abstract description 43
- 238000002156 mixing Methods 0.000 claims abstract description 146
- 239000007788 liquid Substances 0.000 claims abstract description 95
- 239000000203 mixture Substances 0.000 claims abstract description 38
- 238000000034 method Methods 0.000 claims description 25
- 239000000463 material Substances 0.000 claims description 11
- 239000002245 particle Substances 0.000 abstract description 6
- 230000007547 defect Effects 0.000 abstract description 5
- 230000000694 effects Effects 0.000 description 10
- 239000000356 contaminant Substances 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 6
- 238000011010 flushing procedure Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 238000005067 remediation Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 239000003802 soil pollutant Substances 0.000 description 1
- 238000003805 vibration mixing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F33/00—Other mixers; Mixing plants; Combinations of mixers
- B01F33/80—Mixing plants; Combinations of mixers
- B01F33/82—Combinations of dissimilar mixers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/50—Mixing liquids with solids
- B01F23/51—Methods thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/50—Mixing liquids with solids
- B01F23/59—Mixing systems, i.e. flow charts or diagrams
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/10—Mixing by creating a vortex flow, e.g. by tangential introduction of flow components
- B01F25/103—Mixing by creating a vortex flow, e.g. by tangential introduction of flow components with additional mixing means other than vortex mixers, e.g. the vortex chamber being positioned in another mixing chamber
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/40—Static mixers
- B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
- B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
- B01F25/431—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/40—Static mixers
- B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
- B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
- B01F25/433—Mixing tubes wherein the shape of the tube influences the mixing, e.g. mixing tubes with varying cross-section or provided with inwardly extending profiles
- B01F25/4335—Mixers with a converging-diverging cross-section
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F33/00—Other mixers; Mixing plants; Combinations of mixers
- B01F33/70—Mixers specially adapted for working at sub- or super-atmospheric pressure, e.g. combined with de-foaming
- B01F33/71—Mixers specially adapted for working at sub- or super-atmospheric pressure, e.g. combined with de-foaming working at super-atmospheric pressure, e.g. in pressurised vessels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/02—Extraction using liquids, e.g. washing, leaching, flotation
Abstract
A high-pressure vortex high-efficiency separation method for pollutants in soil comprises the following steps: high-pressure conveying the separating liquid; the flow rate of the conveyed separating liquid is further increased and divided into left and right two parts; forming primary turbulent flow mixing of the two separated liquids and the soil to be separated; rotating and rubbing the mixture of the separating liquid and the soil forming primary turbulent mixing to realize further mixing; reducing the flow rate and impact force of the mixture of the further mixed separation liquid and soil; forming a secondary turbulent mixing of the mixture of the separated liquid and the soil with reduced flow rate and impact force, while further reducing the flow rate and impact force thereof; the final mixture of the separated liquid and the soil is collected and subjected to solid-liquid separation. The high-pressure vortex high-efficiency separation method for the pollutants in the soil realizes high-efficiency and rapid separation of the polluted soil, remarkably improves the separation efficiency of the pollutants and soil particles, overcomes the defects of uneven mixing and low efficiency in the prior art, and has good application prospect.
Description
Technical Field
The invention relates to the technical field of soil remediation, in particular to a high-pressure vortex efficient separation method for pollutants in soil.
Background
In the common technology of field restoration at home and abroad, the migration of pollutants from soil phase to water phase is realized through the stirring and mixing of separating liquid and soil, and then the removal of the pollutants is realized through solid-liquid separation, so that the method is a common restoration means. The technology can realize the removal of pollutants of different categories such as organic matters, heavy metals and the like by preparing separating liquids with different properties, and can remarkably reduce the content of soil pollutants.
Among them, the ectopic separation process has been paid attention to in recent years because of its excellent effect and high reliability as compared with other repair methods. The effect of the ectopic separation process is closely related to the mixing condition of the soil and the separating liquid, and the existing main flow mixing stirring device generally adopts the processes of soil block crushing, particle screening, vibration mixing, roller mixing, spiral stirring, multi-stage treatment and the like to realize the full mixing of the separating liquid and the soil. However, the processes still have the defects of uneven mixing, low efficiency, large occupied area and the like.
At present, the introduction of high-pressure vortex high-efficiency separation technology is less, the related technology mainly improves the mixing efficiency by increasing the separation hydraulic pressure, and the related technology is lack of the related technology in terms of pipeline structure efficiency, so that a more perfect shower structure scheme is still needed in terms of pipeline structure efficiency and separation efficiency.
Disclosure of Invention
The invention is made to solve the problems, and aims to provide a high-pressure vortex efficient separation method for pollutants in soil.
The invention provides a high-pressure vortex high-efficiency separation method for pollutants in soil, which has the following characteristics: the method comprises the following steps: high-pressure conveying the separating liquid; the flow rate of the conveyed separating liquid is further increased and divided into left and right two parts; forming primary turbulent flow mixing of the two separated liquids and the soil to be separated; rotating and rubbing the mixture of the separating liquid and the soil forming primary turbulent mixing to realize further mixing; reducing the flow rate and impact force of the mixture of the further mixed separation liquid and soil; forming a secondary turbulent mixing of the mixture of the separated liquid and the soil with reduced flow rate and impact force, while further reducing the flow rate and impact force thereof; the final mixture of the separated liquid and the soil is collected and subjected to solid-liquid separation.
The high-pressure vortex high-efficiency separation method for pollutants in soil provided by the invention can also have the following characteristics: the method comprises the steps that a high-pressure vortex efficient separating device for pollutants in soil is used for mixing separating liquid and the soil, the high-pressure vortex efficient separating device for the pollutants in the soil comprises a shrinkage tube, a first mixing chamber, a high-pressure mixing tube, an expansion tube and a second mixing chamber which are sequentially communicated, the initial end of the shrinkage tube is a separating liquid inlet, a flow-dividing lifting surface is arranged at the bottom in the shrinkage tube and is used for dividing the flowing separating liquid into left and right two flows and lifting the left and right flows at the same time, a soil material inlet is arranged at the top of the first mixing chamber, the inner walls of the left and right sides of the first mixing chamber are in a circular arc shape which is convenient for forming turbulence, and rotary blades are arranged in the high-pressure mixing tube and are used for enabling the flowing mixture of the separating liquid and the soil to rotate, rub and mix; the bottom of the tail end of the expansion pipe is provided with a soil outlet, and the inner wall of the rear side of the second mixing chamber is arc-shaped which is convenient for forming turbulence.
Further, the diversion lifting surface comprises a first smooth curved surface and a second smooth curved surface, the first smooth curved surface and the second smooth curved surface are distributed left and right in the shrinkage tube, and the distance from the bottom side inner wall of the shrinkage tube to the tail end along the starting end gradually increases.
Further, the high-pressure mixing pipe is internally provided with a plurality of groups of rotating blades distributed along the axial direction, and each group of rotating blades comprises at least two rotating blades distributed along the circumferential direction of the high-pressure mixing pipe.
Further, the soil material inlet is in a vertically arranged tubular shape.
Further, the soil outlet is in a vertically arranged tubular shape.
Further, a flowmeter is arranged at the separating liquid inlet.
Further, a pressure gauge is arranged in the middle of the high-pressure mixing pipe.
Further, the medium pressure in the first mixing chamber and the high-pressure mixing pipe is 80-150 MPa.
The high-pressure vortex high-efficiency separation method for pollutants in soil provided by the invention can also have the following characteristics: the soil to be separated is crushed and sieved in advance.
Effects and effects of the invention
According to the high-pressure vortex high-efficiency separation method for pollutants in soil, which is related by the invention, because the separating liquid is conveyed at high pressure, in the process of flushing the soil, the high-pressure separating liquid is firstly subjected to further speed increasing and flow dividing, then is subjected to primary turbulent mixing with the soil to be separated, then is subjected to rotation and friction, further mixing is realized, impact pressure is relieved, then is subjected to secondary turbulent mixing and speed reducing, and finally is subjected to solid-liquid separation, so that the high-efficiency and rapid separation of the polluted soil is realized. Therefore, the method remarkably improves the separation efficiency of pollutants and soil particles, solves the defects of uneven mixing and low efficiency in the prior art, and has good application prospect.
Drawings
FIG. 1 is a schematic step diagram of a method for high-pressure vortex efficient separation of contaminants in soil in accordance with an embodiment of the present invention;
FIG. 2 is a side cross-sectional view of a high pressure vortex high efficiency separation apparatus for contaminants in soil in accordance with an embodiment of the invention;
FIG. 3 is a top cross-sectional view of a high pressure vortex high efficiency separation apparatus for contaminants in soil in accordance with an embodiment of the present invention;
fig. 4 is a schematic view of the structure of a rotary blade in a high-pressure mixing pipe in an embodiment of the present invention.
Reference numerals illustrate:
100 high-pressure vortex high-efficiency separating device for pollutants in soil; 10 shrinkage tube; 11 a separating liquid inlet; 12, diverting the lifting surface; 121 a first smooth curved surface; 122a second smooth curved surface; 20 a first mixing chamber; 21 soil material inlet; 30 high pressure mixing tube; 31 rotating the blades; 40 expanding the tube; 41 soil outlet; a second mixing chamber 50; a 60 flow meter; 70 pressure gauge.
Detailed Description
In order to make the technical means, the creation features, the achievement of the purpose and the effect of the present invention easy to understand, the present invention is specifically described below with reference to the accompanying drawings.
Examples
FIG. 1 is a schematic step diagram of a method for high pressure vortex efficient separation of contaminants from soil.
As shown in fig. 1, the embodiment provides a high-pressure vortex efficient separation method for pollutants in soil, which comprises the following steps: high-pressure conveying the separating liquid; the flow rate of the conveyed separating liquid is further increased and divided into left and right two parts; forming primary turbulent flow mixing of the two separated liquids and the soil to be separated; rotating and rubbing the mixture of the separating liquid and the soil forming primary turbulent mixing to realize further mixing; reducing the flow rate and impact force of the mixture of the further mixed separation liquid and soil; forming a secondary turbulent mixing of the mixture of the separated liquid and the soil with reduced flow rate and impact force, while further reducing the flow rate and impact force thereof; the final mixture of the separated liquid and the soil is collected and subjected to solid-liquid separation.
The separation liquid and the soil are fully mixed by the high-pressure vortex high-efficiency separation device for pollutants in the soil, and the device is specifically described below.
Fig. 2 is a side sectional view of the high-pressure vortex high-efficiency separation apparatus 100 for contaminants in the soil, and fig. 3 is a top sectional view of the high-pressure vortex high-efficiency separation apparatus 100 for contaminants in the soil.
As shown in fig. 2 and 3, the high-pressure vortex high-efficiency separating apparatus 100 for contaminants in soil mainly includes a shrinkage tube 10, a first mixing chamber 20, a high-pressure mixing tube 30, an expansion tube 40, and a second mixing chamber 50, which are sequentially communicated.
The beginning (or large diameter end) of the shrinkage tube 10 is a separating liquid inlet 11 into which high pressure separating liquid enters, and the end (or small diameter end) of the shrinkage tube 10 is connected with the first mixing chamber 20, and the shrinkage tube 10 gradually reduces the pipe diameter to increase the flow velocity of the separating liquid flowing through. The bottom in the shrink tube 10 is equipped with reposition of redundant personnel lifting surface 12, and reposition of redundant personnel lifting surface 12 includes first smooth curved surface 121 and the smooth curved surface 122 of second, and first smooth curved surface 121 and the smooth curved surface 122 of second are about in shrink tube 10 distributes to its bottom side inner wall of shrink tube 10's distance along the beginning towards terminal direction increase gradually, so can make the disjunctor liquid that flows through reposition of redundant personnel lifting surface 12 divide into left and right sides two strands, and steady lifting simultaneously further increases the velocity of flow.
The top of the first mixing chamber 20 is provided with a soil inlet 21 for soil to enter, and the soil inlet 21 is in a vertically arranged tubular shape, so that the soil falls into the first mixing chamber 20 under the action of gravity. The first mixing chamber 20 adopts a circular chamber design, specifically, the inner walls of the left and right sides of the first mixing chamber 20 are circular arc-shaped, and are used for guiding two separated liquids which are split and lifted by the split lifting surface 12, so that turbulent flow is formed in the first mixing chamber 20. As shown in fig. 3, when two separated liquids enter the first mixing chamber 20 and soil falls into the first mixing chamber 20 from the soil material inlet 21, the two separated liquids are converged and collided under the guide of the inner wall of the first mixing chamber 20 and fall under the action of gravity, and meanwhile, the two separated liquids form a strong collision with the soil, so that strong mixing, crushing and separation are realized, one part of the mixture flows into the high-pressure mixing pipe 30, and the other part of the mixture flows in a turbulent flow in the first mixing chamber 20, so that the full mixing of the separated liquids and the soil and the full separation of pollutants transferred to the separated liquids are realized efficiently.
The high pressure mixing tube 30 is provided for the flow flushing of the mixture of separation liquid and soil flowing therethrough, where "flow flushing" means that the separation liquid and soil are thoroughly mixed and collided. A plurality of sets of rotating blades 31 distributed in the axial direction are provided in the high-pressure mixing pipe 30, and each set of rotating blades 31 includes a plurality of rotating blades 31 distributed in the circumferential direction of the high-pressure mixing pipe 30. As shown in fig. 4, the rotary blade 31 has a schematic structure, and the rotary blade 31 has an arc-shaped curve. The arrangement of the rotating blades 31 causes the flowing separation liquid and soil to rub and rotate in the high-pressure mixing pipe 30, forming turbulent flow, and achieving further mixing and separation.
The initial end (or small diameter end) of the expansion pipe 40 is connected to the end of the high pressure mixing pipe 30, the end (or large diameter end) of the expansion pipe 40 is connected to the second mixing chamber 50, and the expansion pipe 40 gradually increases the pipe diameter to reduce the flow rate of the mixture of the separation liquid and the soil flowing through the expansion pipe 40 so as to slow down the impact force and simultaneously further mix the separation liquid and the soil. The bottom of the end of the expansion pipe 40 is provided with a soil outlet 41, and the soil outlet 41 is vertically provided in a tubular shape so that the mixture in the expansion pipe 40 and the mixture flowing back from the second mixing chamber 50 can flow out under the action of gravity.
The second mixing chamber 50 allows the mixture of the separation liquid and the soil to collide with the inner wall to form secondary turbulent mixing, and simultaneously reduces the flow rate and the impact force, so that the subsequent discharging is facilitated. The second mixing chamber 50 adopts a semicircular chamber design, specifically, the inner wall of the rear side of the second mixing chamber 50 is arc-shaped and is used for guiding the mixture of the separation liquid and the soil, so that turbulent flow is formed by collision and backflow, and secondary mixing of the separation liquid and the soil is realized.
When the high-pressure vortex high-efficiency separating device for pollutants in soil is used, the soil to be separated firstly falls into the first mixing chamber 20 from the soil material inlet 21 to perform primary mixing operation, the turbulence of the separating liquid formed by the diversion lifting surface 12 is used for realizing mixing and separation, then the soil enters the high-pressure mixing pipe 30, the further mixing and separation are realized by the rotating blades 31 in the high-pressure mixing pipe 30, then the soil enters the expansion pipe 40 to slow down the flow speed, the impact force is reduced, then the soil enters the second mixing chamber 50 to perform collision impact again, the secondary mixing and speed reduction are realized, and finally the soil is collected from the soil material outlet 41. The separating liquid firstly enters from the separating liquid inlet 11, further speed and flow distribution are realized through the shrinkage tube 10 and the flow distribution lifting surface 12, the impact force and the mixing degree in the separation process are increased, then the separating liquid enters into the first mixing chamber 20 and the high-pressure mixing tube 30, flows in a mixing way with soil, and finally is collected from the soil outlet 41.
The soil fed from the soil inlet 21 should be crushed and sieved in advance, so that the soil should not contain large granular soil and stones, which would damage the diversion lifting surface 12, the first mixing chamber 20, the high pressure mixing pipe 30, the expansion pipe 40 and the second mixing chamber 50. Therefore, in the concrete implementation, the crushing device, the screening device and the conveying device are required to be installed in front of the soil material inlet 21 so as to be matched with the high-pressure vortex high-efficiency separating device for pollutants in the soil.
The separation liquid entering from the separation liquid inlet 11 is conveyed by a high-pressure pump, the conveying pressure is determined according to the actual equipment condition, the recommended pressure is 80-150 MPa, and a good separation effect can be obtained. Further, the flow meter 60 is disposed at the separating liquid inlet 11, and the flow meter 60 can meter the separating liquid entering the high-pressure mixing tube 30, so as to facilitate monitoring and adjustment, and the flow rate of the separating liquid can be properly adjusted according to the pressure in the high-pressure mixing tube 30. The middle part of the high-pressure mixing pipe 30 is provided with a pressure gauge 70, and the pressure gauge 70 can measure the pressure of the mixture in the high-pressure mixing pipe 30, so that the monitoring and the adjustment are convenient, and the pressure of the mixture in the high-pressure mixing pipe 30 detected by the pressure gauge 70 is preferably 80-150 MPa.
In the high-pressure vortex high-efficiency separation device 100 for pollutants in soil shown in this embodiment, no relevant pipe section valve is provided, and in the specific implementation, a flow control valve and the like should be provided according to actual operation needs.
The mixture of the separating liquid and the soil is collected from the soil outlet 41, and the mixture is subjected to a solid-liquid separation process, and finally the separated separating liquid is recycled, so that the separated soil is subjected to pollutant removal.
In addition, the high-pressure vortex high-efficiency separating device 100 for pollutants in soil can be connected in series in multiple stages, so that the separating effect is further improved, and the high-pressure vortex high-efficiency separating device can be used in parallel in multiple stages, so that the soil treatment capacity is improved.
Effects and effects of the examples
According to the high-pressure vortex high-efficiency separation method for pollutants in soil, which is related to the embodiment, because the separation liquid is conveyed at high pressure, in the process of flushing the soil, the high-pressure separation liquid is firstly subjected to further speed increasing and flow dividing, then is subjected to primary turbulent mixing with the soil to be separated, then is subjected to rotation and friction, further mixing is realized, impact pressure is relieved, then is subjected to secondary turbulent mixing and speed reducing, and finally is subjected to solid-liquid separation, so that the high-efficiency and rapid separation of the polluted soil is realized. Therefore, the method remarkably improves the separation efficiency of pollutants and soil particles, solves the defects of uneven mixing and low efficiency in the prior art, and has good application prospect
The mixing of the separating liquid and the soil is realized by adopting a high-pressure vortex high-efficiency separating device for pollutants in the soil. The device comprises a shrinkage tube, a first mixing chamber, a high-pressure mixing tube, an expansion tube and a second mixing chamber which are communicated in sequence. The shrinkage pipe is internally provided with a diversion lifting surface, the first mixing chamber is designed by adopting a cavity with circular arc inner walls at two sides, the top is provided with a soil material inlet, the high-pressure mixing pipe is internally provided with a rotary blade, the bottom of the tail end of the expansion pipe is provided with a soil material outlet, and the second mixing chamber is designed by adopting a cavity with circular arc inner walls at the rear side. When the soil to be separated enters the first mixing chamber, the soil and the separating liquid formed by the diversion lifting surface form primary turbulent mixing in the first mixing chamber, then enter the high-pressure mixing pipe, further mix and separate through the rotating blades in the high-pressure mixing pipe, then enter the expansion pipe to slow down the impact pressure, then enter the second mixing chamber to collide and impact again, so that secondary turbulent mixing and speed reduction are realized, and finally the soil is collected from the soil outlet at the tail end of the expansion pipe. The device adopts high-pressure scouring and special configuration design, obviously improves the separation efficiency of pollutants and soil particles, solves the defects of uneven mixing, low efficiency and large occupied area in the prior art, and reduces the cost.
Further, the pressure in the first mixing chamber and the high-pressure mixing pipe is preferably 80-150 Mpa, so that the separation liquid and the soil can be fully mixed, and damage to the rotating blades in the high-pressure mixing pipe caused by too high impact force can be avoided.
Furthermore, by adopting a two-section mixing chamber design, the separation effect of pollutants and soil particles is obviously improved. The first mixing chamber adopts a split-flow mixing mode, the high-pressure separating liquid forms two high-speed separating liquid flows through a split-flow lifting surface, turbulent flow is formed by collision in the first mixing chamber, and violent collision is formed with added soil, so that powerful mixing, crushing and separation are realized. The second mixing chamber adopts a collision mixing mode, and the flushing mixture forms turbulent flow through collision and backflow, so that secondary mixing of the separating liquid and the soil is realized.
Further, the rotating blades may be axially distributed in a plurality of groups within the high-pressure mixing tube, and the rotating blades of each group may be circumferentially distributed along the high-pressure mixing tube. The rotating blades can enable the high-pressure separation liquid and the soil to rub and rotate in the high-pressure mixing pipe to form turbulent flow, so that full mixing is realized. The pressure and the speed in the pipe are fully utilized, the mixing of the high-pressure jet flow and the straight pipe is realized, the separation efficiency is greatly increased, and the occupied area and the cost of equipment are reduced.
Further, the expansion pipe and the second mixing chamber can effectively reduce the end pressure and prolong the service life of the high-pressure vortex efficient separating device for pollutants in the soil. The expansion pipe realizes the speed reduction of the high-pressure high-speed showering mixture through the pipe diameter increase, and the impact on the tail end of the pipe is effectively reduced. The impact of the separating liquid on the pipeline is obviously reduced by the second mixing chamber through the circular arc-shaped rear side inner wall.
Further, a flowmeter is arranged at the separating liquid inlet and can meter the separating liquid entering the high-pressure mixing pipe. The middle part at the high-pressure mixing tube is provided with a pressure gauge which can measure the pressure of the mixture in the high-pressure mixing tube. Through setting up flowmeter and manometer, be convenient for monitor and adjust the flow and the pressure of medium in this device.
Further, the soil to be separated is crushed and screened in advance, so that damage to pipelines, chambers and internal structures can be avoided.
The above embodiments are preferred examples of the present invention, and are not intended to limit the scope of the present invention.
Claims (8)
1. The high-pressure vortex efficient separation method for the pollutants in the soil is characterized by comprising the following steps of:
High-pressure conveying the separating liquid;
the flow rate of the conveyed separating liquid is further increased and divided into left and right two parts;
Forming primary turbulent flow mixing of the two separated liquids and the soil to be separated;
rotating and rubbing the mixture of the separating liquid and the soil forming primary turbulent mixing to realize further mixing;
reducing the flow rate and impact force of the mixture of the further mixed separation liquid and soil;
forming a secondary turbulent mixing of the mixture of the separated liquid and the soil with reduced flow rate and impact force, while further reducing the flow rate and impact force thereof;
Collecting the final mixture of the separating liquid and the soil, and carrying out solid-liquid separation on the final mixture,
Wherein the high-pressure vortex high-efficiency separation method for pollutants in the soil uses a high-pressure vortex high-efficiency separation device for pollutants in the soil to mix the separating liquid and the soil,
The high-pressure vortex efficient separating device for pollutants in soil comprises a shrinkage tube, a first mixing chamber, a high-pressure mixing tube, an expansion tube and a second mixing chamber which are sequentially communicated, wherein the starting end of the shrinkage tube is a separating liquid inlet, a flow-dividing lifting surface is arranged at the bottom in the shrinkage tube and is used for dividing the flowing separating liquid into left and right two parts and lifting the left and right parts at the same time, a soil material inlet is arranged at the top of the first mixing chamber, the inner walls of the left and right sides of the first mixing chamber are arc-shaped and are convenient for forming turbulence, and rotating blades are arranged in the high-pressure mixing tube and are used for enabling the mixture of the flowing separating liquid and the soil to rotate, rub and mix; the bottom of the tail end of the expansion pipe is provided with a soil outlet, the inner wall of the rear side of the second mixing chamber is in a circular arc shape which is convenient for forming turbulent flow,
The diversion lifting surface comprises a first smooth curved surface and a second smooth curved surface,
The first smooth curved surface and the second smooth curved surface are distributed left and right in the shrink tube, and the distance from the first smooth curved surface to the bottom side inner wall of the shrink tube is gradually increased along the direction from the start end to the end.
2. The method for efficiently separating pollutants in soil by high-pressure vortex according to claim 1, wherein the method comprises the following steps:
wherein the number of the rotary blades is plural,
A plurality of groups of rotating blade groups distributed along the axial direction are arranged in the high-pressure mixing pipe, and each group of rotating blade groups comprises at least two rotating blades distributed along the circumferential direction of the high-pressure mixing pipe.
3. The method for efficiently separating pollutants in soil by high-pressure vortex according to claim 1, wherein the method comprises the following steps:
Wherein, the soil material inlet is the tubulose of vertical setting.
4. The method for efficiently separating pollutants in soil by high-pressure vortex according to claim 1, wherein the method comprises the following steps:
wherein, the soil outlet is the tubulose of vertical setting.
5. The method for efficiently separating pollutants in soil by high-pressure vortex according to claim 1, wherein the method comprises the following steps:
Wherein, the separating liquid inlet is provided with a flowmeter.
6. The method for efficiently separating pollutants in soil by high-pressure vortex according to claim 1, wherein the method comprises the following steps:
Wherein, the middle part of high pressure mixing tube is equipped with the manometer.
7. The method for efficiently separating pollutants in soil by high-pressure vortex according to claim 1, wherein the method comprises the following steps:
wherein the medium pressure in the first mixing chamber and the high-pressure mixing pipe is 80-150 MPa.
8. The method for efficiently separating pollutants in soil by high-pressure vortex according to any one of claims 1 to 7, which is characterized in that: wherein, the soil to be separated is crushed and sieved in advance.
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| CN202211065138.0A CN115487698B (en) | 2022-09-01 | 2022-09-01 | High-pressure vortex efficient separation method for pollutants in soil |
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| CN115487698B true CN115487698B (en) | 2024-05-03 |
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