CN115487698A - High-pressure vortex high-efficiency separation method for pollutants in soil - Google Patents
High-pressure vortex high-efficiency separation method for pollutants in soil Download PDFInfo
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- CN115487698A CN115487698A CN202211065138.0A CN202211065138A CN115487698A CN 115487698 A CN115487698 A CN 115487698A CN 202211065138 A CN202211065138 A CN 202211065138A CN 115487698 A CN115487698 A CN 115487698A
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- 238000000926 separation method Methods 0.000 title claims abstract description 149
- 239000002689 soil Substances 0.000 title claims abstract description 143
- 239000003344 environmental pollutant Substances 0.000 title claims abstract description 49
- 231100000719 pollutant Toxicity 0.000 title claims abstract description 49
- 238000002156 mixing Methods 0.000 claims abstract description 144
- 239000007788 liquid Substances 0.000 claims abstract description 101
- 239000000203 mixture Substances 0.000 claims abstract description 42
- 230000008602 contraction Effects 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 12
- 239000002245 particle Substances 0.000 abstract description 7
- 230000007547 defect Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 10
- 230000000694 effects Effects 0.000 description 9
- 238000013461 design Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 238000005406 washing Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 239000000356 contaminant Substances 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000008676 import Effects 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
- 238000011066 ex-situ storage 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
- 230000002035 prolonged effect Effects 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
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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
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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
- 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
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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
- 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
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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
- 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
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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
- 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
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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
- 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
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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
- B01F33/70—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
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- 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
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- Dispersion Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
A high-pressure vortex high-efficiency separation method for pollutants in soil comprises the following steps: conveying the separated liquid under high pressure; the flow rate of the conveyed separation liquid is further increased and is divided into a left part and a right part; forming primary turbulent flow mixing between the two separation liquids and the soil to be separated; the mixture of the separation liquid and the soil which form the primary turbulent mixing is rotated and rubbed to realize further mixing; reducing the flow rate and impact force of the further mixed mixture of the separated liquid and the soil; the mixture of the separation liquid and the soil with reduced flow speed and impact force forms secondary turbulent mixing, and simultaneously, the flow speed and the impact force are further reduced; and collecting the mixture of the final separation liquid and the soil, and carrying out solid-liquid separation on the mixture. The high-pressure vortex high-efficiency separation method for pollutants in soil realizes high-efficiency and quick 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 eddy efficient separation method for pollutants in soil.
Background
In the common technology for repairing the field at home and abroad, the migration of pollutants from a soil phase to a water phase is realized by stirring and mixing a separation liquid and soil, and then the removal of the pollutants is realized by solid-liquid separation, so that the method is a common repairing means. According to the technology, through the configuration of separation liquids with different properties, different types of pollutants such as organic matters and heavy metals are removed, and the content of soil pollutants can be remarkably reduced.
Among them, the ex-situ separation process has a good effect and high reliability compared with other repair methods, and has been receiving attention in recent years. The effect of the ectopic separation process is closely related to the mixing condition of soil and separation liquid, and the existing mainstream mixing and 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 separation liquid and the soil. However, these processes still have the disadvantages of uneven mixing, low efficiency, large floor space, etc.
At present, the introduction of the high-pressure vortex high-efficiency separation process is less, the related art mainly increases the separation liquid pressure to improve the mixing efficiency, and the related art is lacking in the aspect of the pipeline structure efficiency, so a more perfect showering structure scheme is still needed in the aspects of the pipeline structure efficiency and the separation efficiency.
Disclosure of Invention
The invention is carried out to solve the problems and aims to provide a high-pressure vortex high-efficiency separation method for pollutants in soil.
The invention provides a high-pressure vortex high-efficiency separation method for pollutants in soil, which is characterized in that: the method comprises the following steps: conveying the separated liquid under high pressure; the flow rate of the conveyed separation liquid is further increased and is divided into a left part and a right part; forming primary turbulent flow mixing between the two separation liquids and the soil to be separated; the mixture of the separation liquid and the soil which form the first turbulent mixing is rotated and rubbed to realize further mixing; reducing the flow rate and impact force of the further mixed mixture of the separated liquid and the soil; the mixture of the separation liquid and the soil with reduced flow speed and impact force forms secondary turbulent mixing, and simultaneously, the flow speed and the impact force are further reduced; and collecting the mixture of the final separation liquid and the soil, and carrying out solid-liquid separation on the mixture.
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 eddy current high-efficiency separation device for pollutants in soil is used for mixing separation liquid and the soil, the high-pressure eddy current high-efficiency separation device for the pollutants in the soil comprises a contraction pipe, a first mixing chamber, a high-pressure mixing pipe, an expansion pipe and a second mixing chamber which are sequentially communicated, the starting end of the contraction pipe is a separation liquid inlet, the bottom inside the contraction pipe is provided with a shunting lifting surface, the shunting lifting surface is used for dividing the flowing separation liquid into a left separation liquid and a right separation liquid and simultaneously lifting, the top of the first mixing chamber is provided with a soil material inlet, the inner walls of the left side and the right side of the first mixing chamber are in a circular arc shape which is convenient for forming turbulence, and a rotating blade is arranged inside the high-pressure mixing pipe and used for enabling a mixture of the flowing separation liquid and the soil to rotate, rub and be mixed; 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 in a circular arc shape which is convenient for forming turbulent flow.
Furthermore, the shunting lifting surface comprises a first smooth curved surface and a second smooth curved surface which are distributed in the shrinkage pipe from left to right, and the distance between the first smooth curved surface and the second smooth curved surface to the bottom side inner wall of the shrinkage pipe is gradually increased from the starting end to the tail end.
Further, the rotating blade is a plurality of, is equipped with along the multiunit rotating blade group of axial distribution in the high-pressure mixing pipe to each group rotating blade group includes along the at least two rotating blade of the circumference distribution of high-pressure mixing pipe.
Further, the soil material inlet is in a vertically arranged tubular shape.
Further, the soil material outlet is in a vertically arranged tubular shape.
Furthermore, a flow meter is arranged at the inlet of the separation liquid.
Further, a pressure gauge is arranged in the middle of the high-pressure mixing pipe.
Furthermore, 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.
Action and effects of the invention
According to the high-pressure vortex high-efficiency separation method for pollutants in soil, provided by the invention, the separation liquid is conveyed at high pressure, and in the process of washing the soil, the high-pressure separation liquid is subjected to further speed increase and flow division, then is subjected to primary turbulent mixing with the soil to be separated, then the mixture of the separation liquid and the soil is subjected to rotation and friction to realize further mixing, then the impact pressure is reduced, then secondary turbulent mixing and speed reduction are performed, and finally, the separation liquid is collected and 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 the pollutants and the soil particles, overcomes the defects of uneven mixing and low efficiency in the prior art, and has good application prospect.
Drawings
FIG. 1 is a schematic diagram of the steps of a high-pressure vortex high-efficiency separation method for pollutants in soil according to an embodiment of the invention;
FIG. 2 is a cross-sectional side view of a high pressure vortex high efficiency separation device for contaminants in soil in an embodiment of the present invention;
FIG. 3 is a sectional top view of a high-pressure vortex high-efficiency separation device for contaminants in soil according to an embodiment of the present invention;
FIG. 4 is a schematic view of the structure of the rotating blades within the high pressure mixing tube in an embodiment of the present invention.
Description of the reference numerals:
100 high-pressure vortex high-efficiency separation device for pollutants in soil; 10, shrinking the tube; 11 a separation liquid inlet; 12 shunting lifting surfaces; 121 a first smooth curved surface; 122 a second smooth curved surface; 20 a first mixing chamber; 21, a soil material inlet; 30 high pressure mixing tubes; 31 a rotating blade; 40 expanding the tube; 41 a soil material outlet; 50 a second mixing chamber; 60 flow meters; 70 pressure gauge.
Detailed Description
In order to make the technical means, the creation features, the achievement purposes and the effects of the invention easy to understand, the following embodiments are specifically described with reference to the attached drawings.
Examples
FIG. 1 is a schematic diagram of the steps of a high-pressure vortex high-efficiency separation method for pollutants in soil.
As shown in fig. 1, the present embodiment provides a high-pressure vortex high-efficiency separation method for pollutants in soil, which includes the following steps: conveying the separated liquid under high pressure; the flow rate of the conveyed separation liquid is further increased and is divided into a left part and a right part; forming primary turbulent flow mixing between the two separation liquids and the soil to be separated; the mixture of the separation liquid and the soil which form the primary turbulent mixing is rotated and rubbed to realize further mixing; reducing the flow rate and impact force of the further mixed mixture of the separated liquid and the soil; the mixture of the separation liquid and the soil with reduced flow speed and impact force is subjected to secondary turbulent mixing, and the flow speed and the impact force are further reduced; and collecting the mixture of the final separation liquid and the soil, and carrying out solid-liquid separation on the mixture.
Wherein, the separation liquid and the soil are fully mixed by the high-pressure vortex high-efficiency separation device for pollutants in the soil, which is explained in detail below.
Fig. 2 is a side sectional view of the high-pressure eddy current high-efficiency separation device 100 for pollutants in soil, and fig. 3 is a top sectional view of the high-pressure eddy current high-efficiency separation device 100 for pollutants in soil.
As shown in fig. 2 and 3, the high-pressure vortex high-efficiency separation device 100 for pollutants in soil mainly comprises a contraction pipe 10, a first mixing chamber 20, a high-pressure mixing pipe 30, an expansion pipe 40 and a second mixing chamber 50 which are communicated in sequence.
The initial end (or the large diameter end) of the contraction tube 10 is a separation liquid inlet 11 into which the high-pressure separation liquid enters, the tail end (or the small diameter end) of the contraction tube 10 is connected with the first mixing chamber 20, and the contraction tube 10 gradually reduces the tube diameter to increase the flow rate of the separation liquid flowing through. The bottom in the contracted pipe 10 is provided with a shunting lifting surface 12, the shunting lifting surface 12 comprises a first smooth curved surface 121 and a second smooth curved surface 122, the first smooth curved surface 121 and the second smooth curved surface 122 are distributed in the contracted pipe 10 from left to right, and the distance between the first smooth curved surface 121 and the second smooth curved surface 122 and the inner wall of the bottom side of the contracted pipe 10 is gradually increased from the beginning to the end, so that the separation liquid flowing through the shunting lifting surface 12 is divided into a left part and a right part, and is lifted stably at the same time, and the flow rate is further increased.
The top of first mixing chamber 20 is equipped with the soil inlet 21 that supplies soil to get into, and soil inlet 21 is the tubulose of vertical setting for soil falls into in first mixing chamber 20 under the action of gravity. The first mixing chamber 20 is designed to be a circular chamber, and specifically, the inner walls of the left and right sides of the first mixing chamber 20 are arc-shaped, so that two separated liquids which are split and lifted by the splitting and lifting surface 12 are guided to form turbulent flow in the first mixing chamber 20. As shown in fig. 3, when two separated liquids enter the first mixing chamber 20 and the soil falls into the first mixing chamber 20 from the soil inlet 21, the two separated liquids are guided by the inner wall of the first mixing chamber 20 to merge and collide with each other and fall under gravity, and at the same time, they collide with the soil vigorously to achieve strong mixing, breaking and separation, wherein a part of the mixture flows into the high-pressure mixing pipe 30, and another part of the mixture flows in the first mixing chamber 20 in a turbulent manner, so that the separation liquid and the soil are mixed thoroughly and the pollutants are efficiently transferred to the separation liquid for thorough separation.
The high pressure mixing pipe 30 is used for flowing and washing the mixture of the separation liquid and the soil, wherein the flowing and washing means that the separation liquid and the soil are fully mixed and collided. The high-pressure mixing pipe 30 is internally provided with a plurality of groups of rotating blades 31 distributed along the axial direction, and each group of rotating blades 31 comprises a plurality of rotating blades 31 distributed along the circumferential direction of the high-pressure mixing pipe 30. Referring to fig. 4, a schematic view of the rotary blade 31 is shown, and the rotary blade 31 is curved. The rotating blades 31 are arranged to enable the separation liquid and the soil flowing through to be rubbed and rotated in the high-pressure mixing pipe 30 to form turbulent flow, so that further mixing and separation are realized.
The beginning (or small diameter) of the expanding tube 40 is connected to the end of the high pressure mixing tube 30, the end (or large diameter) of the expanding tube 40 is connected to the second mixing chamber 50, and the expanding tube 40 gradually increases the tube diameter to reduce the flow rate of the mixture of the separation liquid and the soil flowing through the expanding tube 40, so as to reduce the impact force and simultaneously further mix the separation liquid and the soil. The bottom of the end of the expanding pipe 40 is provided with a soil outlet 41, and the soil outlet 41 is in a vertically arranged tubular shape, so that the mixture in the expanding 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 is used for the mixture of the separation liquid and the soil to collide with the inner wall to form secondary turbulent mixing, and simultaneously, the flow speed and the impact force are reduced, so that the subsequent discharging is facilitated. The second mixing chamber 50 is designed to be a semicircular chamber, and 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 to enable the mixture to form turbulent flow through collision and backflow, so that secondary mixing of the separation liquid and the soil is realized.
This high-efficient separator of pollutant high pressure vortex in soil is when using, it falls into first mixing chamber 20 from soil charge import 21 and carries out a mixing operation to wait to separate soil earlier, realize mixing with the help of the separator torrent that reposition of redundant personnel lifting surface 12 formed, the separation, then get into high-pressure mixing tube 30, realize further mixing with the help of rotating vane 31 in the high-pressure mixing tube 30, the separation, later get into expansion pipe 40 and slow down the velocity of flow, reduce the impact force, later get into second mixing chamber 50 and collide the impact once more, realize secondary mixing and deceleration, finally collect from soil charge export 41. The separation liquid firstly enters from the separation liquid inlet 11, further speed increase and flow distribution are realized through the contraction pipe 10 and the flow distribution lifting surface 12, the impact force and the mixing degree in the separation process are increased, then the separation liquid enters the first mixing chamber 20 and the high-pressure mixing pipe 30, flows with soil in a mixing mode, and finally is collected from the soil material outlet 41.
The soil fed from the soil inlet 21 needs to be crushed and sieved in advance, so that large-particle soil blocks and stones are not suitable to be contained, and the flow dividing lifting surface 12, the first mixing chamber 20, the high-pressure mixing pipe 30, the expansion pipe 40 and the second mixing chamber 50 are damaged. Therefore, in the specific implementation, a crushing device, a screening device and a conveying device need to be installed in front of the soil inlet 21 so as to be matched with a high-pressure vortex high-efficiency separation device for pollutants in soil to use.
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 between 80 and 150MPa, and a relatively good separation effect can be obtained. Further, a flow meter 60 is arranged at the separation liquid inlet 11, the flow meter 60 can be used for metering the separation liquid entering the high-pressure mixing pipe 30, so that the monitoring and the adjustment are convenient, and the flow rate of the separation liquid can be properly adjusted according to the pressure in the high-pressure mixing pipe 30. The pressure gauge 70 is arranged in the middle of the high-pressure mixing pipe 30, the pressure gauge 70 can measure the pressure of the mixture in the high-pressure mixing pipe 30, so that monitoring and adjustment are facilitated, and the mixture pressure in the high-pressure mixing pipe 30, which is detected by the pressure gauge 70, is preferably 80-150 MPa.
It should be noted that, in the high-pressure vortex high-efficiency separation apparatus 100 for contaminants in soil shown in this embodiment, no relevant pipe segment valve is provided, and in the specific implementation, a flow control valve and the like should be provided according to actual operation requirements.
The mixture of the separation liquid and the soil is collected from the soil material outlet 41, the solid-liquid separation process is carried out subsequently, the separation liquid obtained by final separation is recycled, and the pollutant removal of the soil obtained by separation is completed.
In addition, this high-efficient separator of pollutant high pressure vortex 100 in soil can carry out multistage series connection, further promotes the separation effect, also can a plurality of parallel uses, promotes the soil handling capacity.
Effects and effects of the embodiments
According to the high-pressure vortex high-efficiency separation method for pollutants in soil, the separation liquid is conveyed at high pressure, in the process of washing the soil, the high-pressure separation liquid is subjected to further speed increase and flow division, then is subjected to primary turbulent mixing with the soil to be separated, then the mixture of the separation liquid and the soil is rotated and rubbed to realize further mixing, then impact pressure is reduced, then secondary turbulent mixing and speed reduction are performed, and finally solid-liquid separation is performed by collection, so that the high-efficiency and rapid separation of the polluted soil is realized. Therefore, the method obviously improves the separation efficiency of the pollutants and the soil particles, overcomes the defects of uneven mixing and low efficiency in the prior art, and has good application prospect
Wherein, the mixing of the separating liquid and the soil is realized by adopting a high-pressure eddy high-efficiency separating device for pollutants in the soil. The device comprises a contraction pipe, a first mixing chamber, a high-pressure mixing pipe, an expansion pipe and a second mixing chamber which are sequentially communicated. Be equipped with reposition of redundant personnel lifting face in the shrink pipe, first mixing chamber adopts the both sides inner wall to be convex cavity design to the top is equipped with the soil material import, is equipped with rotating vane in the high-pressure mixing pipe, and the terminal bottom of expansion pipe is equipped with the soil material export, and the second mixing chamber adopts the rear side inner wall to be convex cavity design. When soil to be separated enters the first mixing chamber, the soil and separation liquid formed by the aid of the shunt lifting surface form primary turbulent flow mixing in the first mixing chamber, then enter the high-pressure mixing pipe, further mix and separate the soil and the separation liquid by the aid of the shunt lifting surface, then enter the expansion pipe to reduce impact pressure, and then enter the second mixing chamber to collide and impact again, so that secondary turbulent flow mixing and speed reduction are realized, and finally, the soil is collected from a soil outlet at the tail end of the expansion pipe. The device adopts high-pressure scouring and special configuration design, obviously promotes the separation efficiency of pollutant and soil particles, solves the defects of uneven mixing, low efficiency and large occupied area in the prior art, and also reduces the cost.
Furthermore, 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 the damage of rotating blades in the high-pressure mixing pipe caused by overhigh impact force can be avoided.
Furthermore, the two-section mixing chamber design is adopted, so that the separation effect of pollutants and soil particles is obviously improved. The first mixing chamber adopts a shunting mixing mode, two high-speed separated liquid flows are formed by high-pressure separated liquid through a shunting lifting surface, and collide with each other in the first mixing chamber to form turbulent flow, so that the turbulent flow and the added soil are violently collided, and strong mixing, crushing and separating are realized. The second mixing chamber adopts a collision mixing mode, the showering mixture forms turbulent flow through collision and backflow, and secondary mixing of the separation liquid and the soil is achieved.
Further, the rotating blades may be distributed in the high-pressure mixing pipe in a plurality of groups along the axial direction, and the rotating blades of each group may be distributed along the circumferential direction of the high-pressure mixing pipe. 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 the sufficient mixing is realized. The device makes full use of the pressure and the speed in the pipe, realizes the simultaneous mixing of high-pressure jet and the straight pipe, greatly increases the separation efficiency, and reduces the occupied area and the cost of the equipment.
Furthermore, the expansion pipe and the second mixing chamber can effectively reduce the pressure at the tail end, and the service life of the high-pressure vortex high-efficiency separation device for pollutants in the soil is prolonged. Wherein, the speed reduction of high pressure high speed showering mixture is realized through the pipe diameter increase to the expansion pipe, has effectively reduced the impact to pipeline end. The impact of the separation liquid on the pipeline is obviously reduced by the circular arc-shaped rear inner wall of the second mixing chamber.
Furthermore, a flow meter is arranged at the inlet of the separation liquid, and the flow meter can meter the separation liquid entering the high-pressure mixing pipe. The middle part of the high-pressure mixing pipe is provided with a pressure gauge, and the pressure gauge can measure the pressure of the mixture in the high-pressure mixing pipe. 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 sieved 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 (10)
1. A high-pressure vortex high-efficiency separation method for pollutants in soil is characterized by comprising the following steps:
conveying the separated liquid under high pressure;
the flow rate of the conveyed separation liquid is further increased and is divided into a left part and a right part;
forming primary turbulent flow mixing between the two separation liquids and the soil to be separated;
the mixture of the separation liquid and the soil which form the first turbulent mixing is rotated and rubbed to realize further mixing;
reducing the flow rate and impact force of the further mixed mixture of the separated liquid and the soil;
the mixture of the separation liquid and the soil with reduced flow speed and impact force forms secondary turbulent mixing, and simultaneously, the flow speed and the impact force are further reduced;
and collecting the mixture of the final separation liquid and the soil, and carrying out solid-liquid separation on the mixture.
2. The high-pressure vortex high-efficiency separation method of pollutants in soil according to claim 1, which is characterized in that:
wherein the high-pressure vortex high-efficiency separation method for pollutants in soil uses a high-pressure vortex high-efficiency separation device for pollutants in soil to mix separation liquid and soil,
the high-pressure vortex efficient separation device for pollutants in soil comprises a contraction pipe, a first mixing chamber, a high-pressure mixing pipe, an expansion pipe and a second mixing chamber which are sequentially communicated, wherein the starting end of the contraction pipe is a separation liquid inlet, the bottom in the contraction pipe is provided with a shunting and lifting surface, the shunting and lifting surface is used for dividing flowing separation liquid into a left part and a right part and lifting the flowing separation liquid simultaneously, the top of the first mixing chamber is provided with a soil material inlet, the inner walls of the left side and the right side of the first mixing chamber are in a circular arc shape which is convenient for forming turbulence, and a rotating blade is arranged in the high-pressure mixing pipe and used for enabling a mixture of the flowing separation liquid and 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 in a circular arc shape which is convenient for forming turbulent flow.
3. The high-pressure vortex high-efficiency separation method for pollutants in soil according to claim 2, which is characterized in that:
wherein the flow dividing and 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 in the shrinkage pipe from left to right, and the distance from the first smooth curved surface to the inner wall of the bottom side of the shrinkage pipe is gradually increased from the initial end to the tail end.
4. The high-pressure vortex high-efficiency separation method of pollutants in soil according to claim 2, which is characterized in that:
wherein the number of the rotating blades is multiple,
the high-pressure mixing pipe is internally provided with a plurality of groups of rotating blade sets which are distributed along the axial direction, and each group of rotating blade sets comprises at least two rotating blades which are distributed along the circumferential direction of the high-pressure mixing pipe.
5. The high-pressure vortex high-efficiency separation method of pollutants in soil according to claim 2, which is characterized in that:
wherein, the soil material inlet is vertically arranged in a tubular shape.
6. The high-pressure vortex high-efficiency separation method for pollutants in soil according to claim 2, which is characterized in that:
wherein, the soil material export is the vertically arranged tubulose.
7. The high-pressure vortex high-efficiency separation method of pollutants in soil according to claim 2, which is characterized in that:
wherein, a flowmeter is arranged at the inlet of the separation liquid.
8. The high-pressure vortex high-efficiency separation method of pollutants in soil according to claim 2, which is characterized in that:
wherein, the middle part of high-pressure mixing pipe is equipped with the manometer.
9. The high-pressure vortex high-efficiency separation method of pollutants in soil according to claim 2, which is characterized in that:
wherein the medium pressure in the first mixing chamber and the high-pressure mixing pipe is 80-150 MPa.
10. The high-pressure vortex high-efficiency separation method for pollutants in soil according to any one of claims 1 to 9, which is characterized in that:
wherein the soil to be separated is previously crushed and sieved.
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| CN115920687A (en) * | 2023-02-22 | 2023-04-07 | 四川省玖鼎石油有限责任公司 | Lubricating oil conveying device and blending method |
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| CN115487698B (en) | 2024-05-03 |
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