阅读说明：本技术 一种适用于湍流场中微细颗粒运动过程观测的装置 (Device suitable for observing movement process of fine particles in turbulent flow field ) 是由 王利军 李晓恒 闫小康 张海军 曹亦俊 郑恺昕 苏子旭 杨涵曦 尧燕萍 赵首营 于 2020-12-31 设计创作，主要内容包括：本发明公开了一种适用于湍流场中微细颗粒运动过程观测的装置,包括竖向布置的管流段,管流段的上下端分别连通混合桶入料口和出料口,混合桶出料口与管流段之间设循环泵,管流段内设有格栅,混合桶的流体从管流段底部流经格栅后形成湍流,管流段两侧分别设有分光镜与双脉冲激光器,分光镜的两端分别安装有第一波长滤镜、第二波长滤镜、第一CCD相机和第二CCD相机,双脉冲激光器、第一CCD相机以及第二CCD相机的输入端分别与同步器的输出端电连,同步器输入端与数据处理系统的输出端电连,第一CCD相机和第二CCD相机的输出端与数据处理系统的输入端电连,本装置结构简单、操作方便、易于控制,能够为颗粒在湍流场中运动的机理研究提供条件。(The invention discloses a device suitable for observing the movement process of fine particles in a turbulent flow field, which comprises a pipe flow section which is vertically arranged, wherein the upper end and the lower end of the pipe flow section are respectively communicated with a material inlet and a material outlet of a mixing barrel, a circulating pump is arranged between the material outlet of the mixing barrel and the pipe flow section, a grid is arranged in the pipe flow section, fluid in the mixing barrel flows through the grid from the bottom of the pipe flow section to form turbulent flow, a spectroscope and a double-pulse laser are respectively arranged at two sides of the pipe flow section, a first wavelength filter, a second wavelength filter, a first CCD camera and a second CCD camera are respectively arranged at two ends of the spectroscope, the input ends of the double-pulse laser, the first CCD camera and the second CCD camera are respectively and electrically connected with the output end of a synchronizer, the input end of the synchronizer is electrically connected with the output end of a data processing system, and the output ends of the first CCD camera and the second CCD camera, The operation is convenient, the control is easy, and conditions can be provided for the research of the movement mechanism of particles in the turbulent flow field.)

1. The device is characterized by comprising a vertically arranged pipe flow section (4), wherein the upper end and the lower end of the pipe flow section (4) are respectively communicated with a feeding port and a discharging port of a mixing barrel (1) through pipelines, a circulating pump (2) is arranged on a pipeline between the discharging port of the mixing barrel (1) and the pipe flow section (4), a transversely arranged grating (3) is arranged in the pipe flow section (4), fluid of the mixing barrel (1) flows through the grating (3) from the bottom of the pipe flow section (4) and then enters an observation area above the grating to form turbulence, a spectroscope (6) and a double-pulse laser (5) are respectively arranged on two sides of the observation area of the pipe flow section (4), a connecting line of the double-pulse laser (5) and the spectroscope (6) is horizontally arranged, a first wavelength filter (7) and a second wavelength filter (8) are respectively arranged at two ends of the spectroscope (6), the rear of first wavelength filter (7) and second wavelength filter (8) is equipped with corresponding first CCD camera (9) and second CCD camera (10) respectively, the input of dipulse laser instrument (5), the input of first CCD camera (9) and the input of second CCD camera (10) respectively with the output electric connection of synchronizer (11), synchronizer (11) input and the output electric connection of data processing system (12), the output of first CCD camera (9) and second CCD camera (10) and the input electric connection of data processing system (12).

2. A device adapted for the observation of fine particle motion in turbulent fields according to claim 1, wherein the first wavelength filter (7) is 532nm wavelength filter and the second wavelength filter (8) is 570nm wavelength filter.

3. A device adapted for the observation of fine particle motion in a turbulent field according to claim 1, wherein the frequency of said double pulse laser (5) is 0-15 Hz.

4. The device for observing the motion process of fine particles in a turbulent flow field as claimed in claim 1, wherein the spectroscope (6) is arranged perpendicular to the double pulse laser (5), and the spectroscope (6) can divide the received light into two beams.

5. An apparatus adapted for the observation of fine particle motion in a turbulent field according to claim 1, wherein the circulation pump (2) has the function of regulating the rotation speed.

Technical Field

The invention relates to the field of particle motion observation, in particular to a device suitable for observing the motion process of fine particles in a turbulent flow field.

Background

The flotation method is the most widely applied separation method in mineral separation production, and is a method for separating ores by utilizing the difference of the physicochemical properties of the surfaces of minerals. Along with the gradual decrease of rich ore and easy separation ore resources, the ore resources have the characteristics of low grade, fine embedding and complex occurrence. In order to better achieve the recovery of such minerals, mineral separation by fine grinding is often required in mineral separation production, thereby producing a large amount of fine-grained minerals. Therefore, the effective flotation and recovery of useful micro-fine mineral have important significance for improving the comprehensive utilization of resources.

Mineral flotation is mostly carried out in turbulent flow environments. The micro-fine particle minerals have small mass and low kinetic energy, are difficult to break through the liquid film on the surface of the bubbles to realize adhesion, and have lower flotation recovery rate. By enhancing turbulent environment, the kinetic energy of the fine particles is improved, and the collision efficiency of the particles and the bubbles can be effectively improved. In the flotation machine, through intensive stirring, the ore pulp repeatedly passes through the impeller, and particles and bubbles collide in a high-turbulence environment. In the flotation column, the recovery of micro-fine mineral can be effectively improved by integrating the strong turbulence pipeline unit. Therefore, the turbulent environment is strengthened, the kinetic energy of the fine particles can be improved, and the flotation recovery of the fine particles is facilitated.

The research on the movement of particles in the turbulent flow field not only can understand the movement process of the particles in the turbulent flow environment more deeply, but also has important significance for improving the flotation process and optimizing the flotation process. Due to the complexity and randomness of turbulence, the existing research mostly adopts a numerical calculation method, and the experimental data is less. Therefore, the development of a device for observing the particle motion in the turbulent flow field has important significance for the research of the micro-fine particle flotation process.

Disclosure of Invention

Aiming at the technical defects, the invention aims to provide a device suitable for observing the movement process of fine particles in a turbulent flow field, which has the advantages of simple structure, convenient operation and easy control and can provide conditions for the mechanism research of the movement of the particles in the turbulent flow field.

In order to solve the technical problems, the invention adopts the following technical scheme:

the invention provides a device suitable for observing the movement process of fine particles in a turbulent flow field, which comprises a pipe flow section which is vertically arranged, wherein the upper end and the lower end of the pipe flow section are respectively communicated with a feeding port and a discharging port of a mixing barrel through pipelines, a circulating pump is arranged on a pipeline between the discharging port of the mixing barrel and the pipe flow section, a grid which is transversely arranged is arranged in the pipe flow section, fluid in the mixing barrel flows into an observation area above the grid from the bottom of the pipe flow section after flowing through the grid to form turbulent flow, a spectroscope and a double-pulse laser are respectively arranged on two sides of the observation area of the pipe flow section, a connecting line of the double-pulse laser and the spectroscope is horizontally arranged, a first wavelength filter and a second wavelength filter are respectively arranged at two ends of the spectroscope, a first CCD camera and a second CCD camera which are corresponding to the rear parts of the first wavelength filter and the second wavelength filter, an input end and an, The input end of the first CCD camera and the input end of the second CCD camera are respectively and electrically connected with the output end of the synchronizer, the input end of the synchronizer is electrically connected with the output end of the data processing system, and the output ends of the first CCD camera and the second CCD camera are electrically connected with the input end of the data processing system.

Preferably, the first wavelength filter is 532nm wavelength filter, and the second wavelength filter is 570nm wavelength filter.

Preferably, the double-pulse laser frequency is 0-15 Hz.

Preferably, the beam splitter is arranged perpendicular to the double pulse laser, and the beam splitter can split the received light into two beams.

Preferably, the circulation pump has a function of adjusting a rotation speed.

The invention has the beneficial effects that: the device has the advantages of simple structure, convenient operation, capability of changing the speed of the turbulent flow field inside the pipe flow section and the movement speed of mineral particles by adjusting the rotating speed of the circulating pump, capability of calculating the movement speed of the particles and the speed distribution of the turbulent flow field by the data processing system, capability of observing the movement process of easily controlled fine particles, capability of providing conditions for the mechanism research of the movement of the particles in the turbulent flow field, capability of realizing the simultaneous measurement of the turbulent flow field and the particles, no contact, high precision and easy control, and capability of realizing the accurate measurement of the particle speed in the turbulent flow field.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an apparatus suitable for observing a fine particle movement process in a turbulent flow field according to an embodiment of the present invention.

Description of reference numerals:

1-mixing barrel; 2-a circulating pump; 3-a grid; 4-a pipe flow section; 5-a double pulse laser; 6-spectroscope; 7-a first wavelength filter; 8-a second wavelength filter; 9-a first CCD camera; 10-a second CCD camera; 11-a synchronizer; 12-a data processing system.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1, a device suitable for observing the movement process of fine particles in a turbulent flow field comprises a vertically arranged pipe flow section 4, wherein the upper end and the lower end of the pipe flow section 4 are respectively communicated with a feeding port and a discharging port of a mixing barrel 1 through pipelines, a circulating pump 2 is arranged on the pipeline between the discharging port of the mixing barrel 1 and the pipe flow section 4, the circulating pump 2 has the function of adjusting the rotating speed, a transversely arranged grating 3 is arranged in the pipe flow section 4, fluid in the mixing barrel 1 flows through the grating 3 from the bottom of the pipe flow section 4 and then enters an observation area above the grating 3 to form turbulent flow, and a spectroscope 6 and a double-pulse laser 5 are respectively arranged on two sides of the observation area of the pipe flow section 4;

the frequency of the double-pulse laser 5 is 0-15Hz, a connecting line of the double-pulse laser 5 and the spectroscope 6 is horizontally arranged, the spectroscope 6 and the double-pulse laser 5 are vertically arranged, the spectroscope 6 can divide received light into two beams of light, a first wavelength filter 7 and a second wavelength filter 8 are respectively installed at two ends of the spectroscope 6, the first wavelength filter 7 adopts a 532nm wavelength filter, the second wavelength filter 8 adopts a 570nm wavelength filter, and a first CCD camera 9 and a second CCD camera 10 which correspond to each other are respectively arranged behind the first wavelength filter 7 and the second wavelength filter 8;

the input end of the double-pulse laser 5, the input end of the first CCD camera 9 and the input end of the second CCD camera 10 are respectively electrically connected with the output end of the synchronizer 11, the input end of the synchronizer 11 is electrically connected with the output end of the data processing system 12, and the output ends of the first CCD camera 9 and the second CCD camera 10 are electrically connected with the input end of the data processing system 12; the first CCD camera 9 and the second CCD camera 10 record particle and flow field information respectively, and can transmit acquired image data to the data processing system 12 in real time to realize data storage and processing.

The working principle is as follows: fluorescent particles (0-20 mu m, which are used as flow field tracing particles), glass beads (representing particles) and deionized water are mixed in a mixing barrel 1, the bottom of the mixing barrel 1 flows out, a discharge port of the mixing barrel 1 is connected to the bottom of a pipe flow section 4 through a circulating pump 2 and a pipeline, fluid flows through a grid 3 to form turbulence in an observation area above the fluid, and then the fluid flows back to the mixing barrel 1. The double-pulse laser 5 excites a surface laser to irradiate the central surface of the turbulent flow area of the pipe flow section 4. The spectroscope 6 is perpendicular to the irradiated area, under the irradiation of laser, the fluorescence (wavelength 570nm) of the fluorescent particles and the green light (wavelength 532nm) reflected by the glass beads are divided into two beams after passing through the spectroscope 6, the green light with the wavelength 532nm can pass through the 532nm wavelength filter, and the particle motion information is recorded by the first CCD camera 9; the 570nm wavelength filter 8 allows red light of wavelength 570nm to pass through and the flow field information is recorded by the second CCD camera 10. The synchronizer 11 realizes synchronous control of the double-pulse laser 5, the first CCD camera 9 and the second CCD camera 10, and the first CCD camera 9 and the second CCD camera 10 record simultaneously when the double-pulse laser 5 irradiates laser once. The data processing system 12 is capable of calculating the velocity of the movement of the particles and the velocity profile of the turbulent field.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.