WO2019024913A1 - Dispositif de lavage de particules radial - Google Patents

Dispositif de lavage de particules radial Download PDF

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Publication number
WO2019024913A1
WO2019024913A1 PCT/CN2018/098501 CN2018098501W WO2019024913A1 WO 2019024913 A1 WO2019024913 A1 WO 2019024913A1 CN 2018098501 W CN2018098501 W CN 2018098501W WO 2019024913 A1 WO2019024913 A1 WO 2019024913A1
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WO
WIPO (PCT)
Prior art keywords
mandrel
washing
positive
cone
rotating
Prior art date
Application number
PCT/CN2018/098501
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English (en)
Chinese (zh)
Inventor
杨强
耿坤宇
孙荣江
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华东理工大学
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华东理工大学 filed Critical 华东理工大学
Publication of WO2019024913A1 publication Critical patent/WO2019024913A1/fr

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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

Definitions

  • the present invention relates to a particle washing apparatus, and more particularly to an apparatus for performing radial particle washing using swirling, cavitation and enhanced mixing coupling.
  • soil remediation methods at home and abroad mainly include physical repair methods, chemical repair methods and bioremediation methods, but there are disadvantages such as high cost, incompleteness, long cycle, and large environmental conditions.
  • the mechanical cleaning method is a commonly used method for removing petroleum substances in soil particles, and has many advantages such as low consumption, high efficiency, and low secondary pollution.
  • the common mechanical cleaning methods in China are mainly impact jet reactors, stirred vessels and ultrasonic washing methods, but all three methods have certain drawbacks.
  • the patent authorization publication number is CN205032119U, and the name is a stirred tank.
  • the device has a simple structure, the required space is large, and there is a large noise, and the temperature difference between the center of the tank and the material near the tank wall is easy to occur, which affects the washing effect.
  • Another example is the patent CN102716869A, which is called a floating ultrasonic cleaning device.
  • the energy consumption of the device is relatively high, and the large amount of particles cannot be washed at the same time, and once the silencing filler material is damaged, the noise pollution is serious. Therefore, it is necessary to develop an efficient and low-cost washing device suitable for soil particles contaminated by petroleum substances in China.
  • the present invention provides a radial particle washing apparatus.
  • the device has the advantages of high efficiency, low energy consumption of no moving parts, compact structure, space saving and the like.
  • a radial tubular particle washing device is divided into three different forms depending on the washing requirements and the nature of the imported materials.
  • the apparatus includes a straight tube and/or a venturi tube, the two tubes serving as conduits, respectively.
  • the tube is provided with a mandrel with a guide cone at the end, a positive-rotating fin and a counter-rotating fin.
  • the positive rotation and the reverse rotation fin are arranged on the mandrel with the guide cone before and after.
  • the positively-rotating fin and the mandrel with the guiding cone constitute a spinning unit
  • the counter-rotating fin and the mandrel with the guiding cone constitute an intensive mixing unit.
  • the straight pipe has a diameter D and a length of 0.3-0.6D.
  • the mandrel with a guide cone has a diameter of 0.3-0.6D, a length of D, and a cone angle of the guide cone ranges from 15 to 75 degrees.
  • venturi has a diameter D, a length of 0.3-0.6D, a contraction angle range of 23-35°, and a diffusion angle of 3-6°.
  • the arrangement order of the positively-rotating fins and the counter-rotating fins may be four kinds, that is, positive, negative, positive, positive, negative, positive, negative, and reverse.
  • the front end of the mandrel with the guiding cone at the inlet is 0.3-0.6D from the inlet of the device, and the distance from the end of the mandrel with the guiding cone at the outlet is 2D, and the outlet is provided with a guiding cone.
  • the distance from the end of the mandrel to the exit is 0.3-0.6D.
  • the positive-rotating fin has a helix angle of 5-50°
  • the counter-rotating fin has a helix angle of 5-50°
  • the radial particle washing device inlet flow rate ranges from 8.46D 2 -28.26D 2 m 3 /h.
  • the particle washing device is fed in a radial feed mode.
  • mandrel arrangement with the guide cone is coaxial.
  • the radial particle washing device may be arranged in three ways, that is, a full straight tube arrangement; the full-texturial tube is arranged; the straight tube and the venturi tube are alternately arranged.
  • the invention has the beneficial effects that the liquid is quickly entered into the fin by the flow guiding cone, and then the venturi tube is used to cavitation and acceleration of the fluid, the spin-forming effect of the positive-rotating fin and the intensive mixing of the counter-rotating fin
  • the organic combination of swirling and cavitation is achieved to achieve a better washing effect. It has high efficiency, low energy consumption of moving parts, compact structure and space saving.
  • FIG. 1 is a schematic structural view of a device of Embodiment 1;
  • Figure 2 is a schematic view of the particle washing application of the present invention.
  • Figure 3 is a schematic structural view of a spinning unit
  • Figure 4 is a schematic structural view of an intensive mixing unit
  • Figure 5 is a schematic view of a straight tube structure
  • Figure 6 is a schematic view of a venturi.
  • the inventors of the present application have found through extensive and intensive research that, for particle washing, the conventional mechanical washing methods are mainly impact jet reactors, stirred vessels and ultrasonic washing methods.
  • the three methods such as agitating the container, which requires a large space, a large noise, and a temperature difference between the center of the tank and the material near the tank wall, which affects the washing effect.
  • the ultrasonic washing device which has relatively high energy consumption and cannot satisfy a large number of particles washing at the same time, and once the sound-absorbing filling material is damaged, the noise pollution is serious.
  • the combination of swirling and cavitation organic combination can achieve good washing effect, compact structure, small space requirement, low energy consumption and high washing efficiency, so it is most suitable. Based on the above findings, the present invention has been completed.
  • FIG. 1 it is a schematic structural view of Embodiment 1 of the present invention.
  • the radial washing device mainly comprises: 2-1 first-stage pipeline positive-rotating fin; 2-2 secondary pipeline positive-rotating fin; 3 end Main shaft with guide cone; 4 straight tube; 5-1 primary line reverse rotor fin; 5-2 secondary line reverse rotor fin; 6 venturi tube.
  • a petrochemical plant uses a material inlet flow of 30 m 3 /h and an inlet pipe diameter of 0.1 m (D). According to the requirements of the washing effect and the nature of the material, the straight tube and the venturi tube are alternately arranged, as shown in Fig. 5 is a schematic diagram of a straight tube structure, and Fig.
  • FIG. 6 is a schematic diagram of a venturi tube.
  • the number of pipeline stages is two.
  • the material passes through the inlet 1, and the particles to be washed flow into the primary washing line with the washing liquid.
  • the solid-liquid mixture quickly enters the positive-rotating fin 2-1, and the swirling action of the positive-rotating fin 2-1, as shown in Fig. 3 is a schematic diagram of the structure of the spinning unit, and its flow form is horizontal
  • the flow becomes a rotating flow.
  • the washing liquid is in full contact with the particles to be washed and collides.
  • the petroleum contaminants in the solid particles and the washing liquid initially form an emulsified state.
  • the solid-liquid mixture enters the counter-rotating fin 5-1 under the diversion of the flow guiding cone after passing through the tube length of 2D.
  • the anti-rotation fin 5-1 achieves the mixing effect of the enhanced washing liquid and the oil-containing solid particles by diffusion, convection and shearing. And increase the degree of liquid turbulence, and further improve the mixing effect.
  • the solid-liquid mixture then exits the primary wash line after passing through a 0.5D tube. After a first-stage washing line, the elution rate reaches 95% or more for oil-containing solid particles having a diameter of >2 mm.
  • the solid-liquid mixture treated by the first-stage washing pipeline enters the secondary washing pipeline, and the primary washing pipeline and the secondary washing pipeline are connected in a flange form.
  • the solid-liquid mixture After passing through the tube length of 0.5D, the solid-liquid mixture quickly enters the positive-rotating fin 2-2 under the diversion of the flow-conducting cone, and the solid-state liquid is rotated by the rotation of the positive-rotating fin 2-2.
  • the degree of flow is intensified, and the washing liquid is in contact with the particles to be washed, the collision is more severe, and the washing effect is remarkably improved.
  • the solid-liquid mixture then enters the constricted section of the venturi 6 after passing through a length of 0.5D. Through the cavitation of the venturi 6, the cavitation rapidly generates, expands and collapses, forming shock waves and high-speed microjets in the liquid, reducing the adhesion of petroleum substances to the solid particles.
  • FIG. 4 is a schematic diagram of the structure of the reinforced mixing unit. Then, the washing device is left in the tube length of 0.5D to complete the washing. After washing by the secondary washing line, the oil removal rate is over 98% for oily solid particles having a diameter > 2 mm. For oil-containing solid particles having a diameter of 0.05 to 2 mm, the elution rate is 80% or more.
  • FIG. 2 it is a schematic diagram of the particle washing application of the present invention, wherein 1 is a liquid storage tank, 2 is a vibrating screen, 3 is a radial particle washing device, 4 is a heater, and 5 is a flash tank.
  • the washing liquid enters the vibrating screen 2 from the liquid storage tank 1 through a pipe, and the liquid distributor passing through the top of the vibrating screen is uniformly distributed on the solid particles to be washed.
  • the solid-liquid ratio is adjusted to prevent blockage of the pipe by adjusting the valve opening of the line between the washing liquid and the radial particle washing device.
  • the heater 4 is introduced to dry the solid particles, and the dried solid particles are backfilled.
  • the mixed steam of the washing liquid heated by the heater 4 and the petroleum substance enters the flash tank 5, and the flashing action of the flash tank 5 separates the washing liquid from the petroleum substance, the petroleum substance is recovered, and the washing liquid enters.
  • the liquid storage tank 1 achieves circulation.
  • the conventional particle washing device 3 has a compact structure, a small space requirement, a low energy consumption, a high washing efficiency, and good applicability, and the like.

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  • Life Sciences & Earth Sciences (AREA)
  • Soil Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Cleaning By Liquid Or Steam (AREA)

Abstract

La présente invention concerne un dispositif de lavage de particules de type tuyau radial, le dispositif de lavage étant divisé en trois formes différentes selon les exigences de lavage et différentes propriétés des matériaux d'alimentation. Le dispositif comprend un tuyau droit (4) et/ou un tuyau Venturi (6) utilisé(s) en tant que canalisation du dispositif de lavage. Un mandrin (3) avec une extrémité pourvue d'un cône de guidage d'écoulement, des ailettes rotatives vers l'avant (2-1 2-2), et des ailettes rotatives vers l'arrière (5-1, 5-2) sont agencés dans un tuyau. Les ailettes rotatives vers l'avant (2-1, 2-2) et les ailettes rotatives vers l'arrière (5-1, 5-2) sont agencées séquentiellement sur le mandrin (3) avec une extrémité pourvue d'un cône de guidage d'écoulement. Les ailettes rotatives vers l'avant (2-1, 2-2) et le mandrin (3) avec une extrémité pourvue d'un cône de guidage d'écoulement forment une unité de formation de rotation, et les ailettes rotatives vers l'arrière (5-1, 5-2) et le mandrin (3) avec une extrémité pourvue d'un cône de guidage d'écoulement forment une unité de mélange renforcée.
PCT/CN2018/098501 2017-08-04 2018-08-03 Dispositif de lavage de particules radial WO2019024913A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201710661975.2A CN107457257A (zh) 2017-08-04 2017-08-04 一种径向颗粒洗涤装置
CN201710661975.2 2017-08-04

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WO2019024913A1 true WO2019024913A1 (fr) 2019-02-07

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107457257A (zh) * 2017-08-04 2017-12-12 华东理工大学 一种径向颗粒洗涤装置
KR102188855B1 (ko) * 2018-12-18 2020-12-09 지우이앤이(주) 오염토 세척 장치

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KR100950696B1 (ko) * 2009-07-30 2010-03-31 주식회사케이에스티 토양의 오염물질 세척장치
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CN106077062A (zh) * 2016-06-30 2016-11-09 华东理工大学 一种土壤浆液洗涤脱附及增浓处理的方法
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005046705A (ja) * 2003-07-28 2005-02-24 Nikko Co Ltd 汚染土壌の浄化装置
KR100950696B1 (ko) * 2009-07-30 2010-03-31 주식회사케이에스티 토양의 오염물질 세척장치
CN203400922U (zh) * 2013-04-12 2014-01-22 浙江桃花源环保科技有限公司 一种污染土壤异位淋洗修复工程化设备
CN106077062A (zh) * 2016-06-30 2016-11-09 华东理工大学 一种土壤浆液洗涤脱附及增浓处理的方法
CN107457257A (zh) * 2017-08-04 2017-12-12 华东理工大学 一种径向颗粒洗涤装置

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