WO2021189786A1 - 一种温湿度可控的微米级颗粒湍流团聚的实验装置 - Google Patents

一种温湿度可控的微米级颗粒湍流团聚的实验装置 Download PDF

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WO2021189786A1
WO2021189786A1 PCT/CN2020/116765 CN2020116765W WO2021189786A1 WO 2021189786 A1 WO2021189786 A1 WO 2021189786A1 CN 2020116765 W CN2020116765 W CN 2020116765W WO 2021189786 A1 WO2021189786 A1 WO 2021189786A1
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gas
agglomeration
particle
turbulence
turbulent
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French (fr)
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东明
王爽
李素芬
尚妍
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Dalian University of Technology
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Dalian University of Technology
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
    • G01N15/04—Investigating sedimentation of particle suspensions
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
    • G01N2015/0092—Monitoring flocculation or agglomeration

Definitions

  • the invention relates to an experimental device for turbulent agglomeration of micron particles with controllable temperature and humidity, belonging to the field of experimental devices for turbulent field collision and agglomeration with controllable temperature and humidity.
  • the phenomenon of fine particulate matter deposition exists in many fields such as energy, environmental engineering, chemical engineering, microelectronics and mechanical engineering.
  • the deposition of fine particles generally has a negative effect.
  • dust on the surface of the heat exchange tube in the boiler leads to deterioration of heat transfer
  • dust on the light-transmitting elements will cause a decrease in luminous flux (for example, the output power of solar photovoltaic cells decreases due to surface dust)
  • fine particles The deposition in the microelectromechanical system may cause mechanical failure or flow blockage, and the deposition of atmospheric fine particles in the human respiratory tract/alveolar may cause diseases.
  • fine particle deposition can be enhanced in practice.
  • fine particles are agglomerated into larger particles through the addition of sound field, magnetic field, electric field, and chemical agglomeration process (also known as agglomeration process). Efficient deposition and removal in a cloth bag or electrostatic precipitator.
  • the purpose of the present invention is to provide an experimental device for turbulent agglomeration of micron particles with controllable temperature and humidity in view of the deficiencies in the prior art.
  • an experimental device for turbulent agglomeration of micron particles with controllable temperature and humidity which includes a gas particle generating device, a gas particle mixing heating device, a high-speed camera device and a gas particle discharge processing device, and it also includes a turbulent flow Collision agglomeration device
  • the gas particle generating device includes a gas cylinder, a mass flow meter, a humidifier, and a particle generator.
  • One end of the atomizer of the humidifier extends into the gas mixer.
  • a flow meter is connected to the second three-way valve, the gas cylinder is connected to the sprayer through the first three-way valve through the second branch, and the other flow meter.
  • a humidity meter is installed on the gas mixer, and the gas mixer is connected through the pipeline through the second three-way valve. Mixing container.
  • the gas-particle mixing heating device comprises a mixing container and a thermocouple.
  • a heating element is arranged on the outer wall of the mixing container.
  • the thermocouple is inserted into the mixing container.
  • the inlet of the mixing container is connected to the gas mixer and the particle generator through a pipeline.
  • the turbulent collision agglomeration device includes a turbulence agglomerator, two sides of the turbulence agglomerator are provided with observation windows, and a turbulence column and a vortex sheet are arranged inside the turbulence agglomerator.
  • the turbulence column is cylindrical, and the turbulence vortex sheet It is a cross-shaped column structure, the spoiler column and the spoiler vortex are arranged in a straight line in the plane of the vertical air flow direction.
  • the inlet pipe of the turbulent agglomerator is equipped with a first constant velocity sampler, and the outlet pipe is equipped with a second constant velocity sampler.
  • the inlet pipe of the turbulent agglomerator is connected to the outlet of the mixing vessel.
  • the high-speed camera device includes a light source, a high-speed camera, and a computer.
  • the light source and the high-speed camera are arranged outside the observation window of the turbulence agglomerator.
  • the computer is connected to the high-speed camera.
  • the air particle discharge treatment device includes an electrostatic precipitator and an induced draft fan.
  • the inlet pipe of the electrostatic precipitator is connected to the outlet of the turbulent agglomerator, the outlet pipe of the electrostatic precipitator is connected to the induced draft fan, and the outlet pipe of the electrostatic precipitator is provided with a third class Speed sampler.
  • the heating element adopts a heat transfer band or a heating tube.
  • the gas in the cylinder uses at least one of nitrogen, carbon dioxide, and air.
  • the experimental device for turbulent agglomeration of micron particles with controllable temperature and humidity includes a gas-particle generating device, a gas-particle mixing heating device, a turbulent collision and agglomeration device, a high-speed camera device, and a gas-particle emission processing device.
  • the device can achieve airflow speed control at 0.5 -20m/s, the airflow temperature is controlled at 220-230°C, so as to realize the experimental research work of the collision and agglomeration between micron-sized particles under the controllable environment, temperature and humidity, which can effectively simulate the particle deposition process in the flue gas pipe and electrostatic dust removal
  • the actual industrial processes such as the deposition process when the particles in the vessel reach the dust collecting plate and the ash on the surface of the heat exchange tube provide effective support for the theoretical study of the collision and agglomeration process between particles.
  • the turbulence collision and agglomeration device can generate different forms of turbulence field through the cooperation of the spoiler column and the spoiler vortex.
  • the high-speed camera system can clearly capture the process of colliding the agglomerated plate between particles with a particle size of 2 ⁇ m or more.
  • Figure 1 is a schematic diagram of an experimental device for turbulent agglomeration of micron-sized particles with controllable temperature and humidity.
  • Figure 2 is a schematic diagram of the structure of the turbulent flow agglomerator.
  • Gas cylinder 1a, the first branch, 1b, the second branch, 2a, the first three-way valve, 2b, the second three-way valve, 3 mass flow meters, 4. humidifier, 4a, sprayer, 4b, gas mixer, 5, particle generator, 6, heating element, 7, mixing vessel, 8, thermocouple, 9, first isokinetic sampler, 9a, second isokinetic sampler, 9b, third, etc.
  • Speed sampler 10, turbulence agglomerator, 10a, observation window, 10b, spoiler column, 10c, turbulence sheet, 11, light source, 12, electrostatic precipitator, 13, induced draft fan, 14, computer, 15, high speed Camera.
  • Figure 1 shows a schematic diagram of an experimental device for turbulent agglomeration of micron-sized particles with controllable temperature and humidity.
  • the experimental device for turbulent agglomeration of micron particles with controllable temperature and humidity includes a gas-particle generating device, a gas-particle mixing heating device, a high-speed camera device, a gas-particle emission processing device, and a turbulent collision agglomeration device.
  • the gas particle generator includes a gas cylinder 1, a mass flow meter 3, a humidifier 4, and a particle generator 5.
  • the humidifier 4 includes a sprayer 4a and a mixer 4b.
  • the gas cylinder 1 passes through the first three-way valve 2a through the first branch pipe 1a, One flow meter 3 is connected to the gas mixer 4b, the gas cylinder 1 is connected to the sprayer 4a through the first three-way valve 2a through the second branch pipe 1b, and the other flow meter 3 is connected to the sprayer 4a, one end of the sprayer 4a extends into the gas mixer 4b, the gas mixer A hygrometer is installed on 4b, and the gas mixer 4b is connected to the gas discharge pipeline through the second three-way valve 2b.
  • the gas-particle mixing heating device includes a heating element 6, a mixing vessel 7, and a thermocouple 8.
  • the heating element 6 is arranged on the outer wall of the mixing vessel 7, and the thermocouple 8 is inserted into the mixing vessel 7, and the inlet of the mixing vessel 7 is connected to the gas of the gas mixer 4b.
  • the turbulence collision agglomeration device includes a turbulence agglomerator 10, two sides of the turbulence agglomerator 10 are provided with observation windows 10a, and the interior of the turbulence agglomerator 10 is provided with a turbulence column 10b and a turbulence vortex sheet 10c.
  • the spoiler column 10b is cylindrical, the spoiler vortex sheet 10c has a cross-shaped columnar structure, the spoiler column 10b and the spoiler vortex sheet 10c are arranged in a straight line in a plane perpendicular to the air flow direction (as shown in Figure 2), and the turbulence agglomerator 10
  • a first isokinetic sampler 9 is set on the inlet pipe of the, and a second isokinetic sampler 9a is set on the outlet pipe.
  • the inlet pipe of the turbulent agglomerator 10 is connected to the outlet of the mixing vessel 7.
  • the high-speed camera device includes a light source 11, a high-speed camera 15 and a computer 14.
  • the light source 11 and the high-speed camera 15 are arranged outside the observation window 10a of the turbulence agglomerator 10.
  • the computer 14 is connected to the high-speed camera 15, the light source 11, the observation window 10a and the high-speed camera 15 The cameras are located on the same line.
  • the air particle discharge treatment device includes an electrostatic precipitator 12 and an induced draft fan 13.
  • the inlet of the electrostatic precipitator 12 is connected to the outlet of the turbulence agglomerator 10, the outlet of the electrostatic precipitator 12 is connected to the induced draft fan 13, and the outlet pipe of the electrostatic precipitator 12 is provided with a Third isokinetic sampler 9b.
  • the heating element 6 is a heat transfer band or a heating tube.
  • the gas in the gas cylinder 1 is at least one of nitrogen, carbon dioxide, and air.
  • the working process of the device open the first three-way valve 2a and the second three-way valve 2b, quickly adjust the air flow, after the air flow is stable, the nitrogen in the cylinder is humidified by the atomizer 4a, and the coal in the particle generator 5
  • the ash particles are transported to the mixing vessel 7, and the coal ash is heated in the mixing vessel 7.
  • the vortex sheet 10c collides and reunites.
  • the high-speed camera 15 Connect the high-speed camera 15 to the computer 14, change the IP address of the computer, and use the control software of the high-speed camera 15 installed on the computer 14 to set camera parameters such as resolution, sampling rate and exposure time.
  • the camera trigger mode is delayed trigger. Adjust the focal length of the high-speed camera 15 to make the imaging clear in the shooting area, prepare to shoot the collision and agglomeration phenomenon in the turbulence condenser, and save the captured video to the computer 14 for subsequent image processing.
  • a particle sampler is arranged at the exit of the turbulent agglomerator 10 to collect fine particle samples before and after the turbulent agglomerator, and observe the microscopic morphology of the particle samples.
  • An electrostatic precipitator 12 is arranged at the end of the experimental device for desorption. In addition to fine particles.
  • the gas particle generating device includes a gas generating device and a particle generating device.
  • the gas source of the gas generating device can be nitrogen, carbon dioxide, air and mixed gas, etc.
  • the gas source can be adjusted according to the actual situation.
  • the air flow is divided into two paths, and the flow is accurately controlled by a mass flow meter respectively.
  • One way is dry gas; the other way produces wet gas through a sprayer.
  • the sprayer can be the Collison sprayer developed by the American BGI company. Two channels of gas enter a gas mixer equipped with a hygrometer, and the mass flow meter can effectively control the flow of dry and wet gas, so as to achieve effective control of the humidity of the gas entering the mixing container.
  • a heating belt or heating tube is used in the mixing vessel to heat
  • a high-precision thermocouple is installed in the mixing vessel to measure the temperature of the airflow
  • the power of the heating device is adjusted by a pressure regulator.
  • the maximum heating temperature of the airflow can reach 220 -230°C, so as to effectively control the temperature of the airflow.
  • the core part of the turbulence agglomeration unit is the design of the turbulence device.
  • the turbulence device is composed of a turbulence column and a vortex fin.
  • the turbulence column is to generate large-scale turbulence
  • the vortex vortex is to generate small-scale turbulence.
  • the combination of the two can produce different forms of turbulence field.
  • the high-speed camera device is composed of a high-speed camera, a point light source, a fixed-focus microscope lens, and a computer.
  • the camera is connected to the computer to store the shooting video.
  • the high-speed camera system can clearly capture the process of colliding the agglomerated plate between particles with a particle size of 2 ⁇ m or more.
  • the device can control the air velocity at 0.5-20m/s and the air temperature at the ambient temperature of 220-230°C, so as to realize the experimental research work on the collision and agglomeration between micron-sized particles under the environmental conditions and the temperature and humidity can be controlled. Simulate the actual industrial processes such as the particle deposition process in the flue gas pipe, the deposition process of the particles in the electrostatic precipitator when they reach the dust collecting plate, and the ash on the surface of the heat exchange tube. At the same time, it provides effective support for the theoretical study of the collision and agglomeration process between particles. .
  • the experimental device for turbulent agglomeration of micron particles with controllable temperature and humidity includes a gas-particle generating device, a gas-particle mixing heating device, a turbulent collision and agglomeration device, a high-speed camera device, and a gas-particle emission processing device.
  • the device can achieve airflow speed control at 0.5 -20m/s, the airflow temperature is controlled at 220-230°C, so as to realize the experimental research work of the collision and agglomeration between micron-sized particles under the controllable environment, temperature and humidity, which can effectively simulate the particle deposition process in the flue gas pipe and electrostatic dust removal
  • the actual industrial processes such as the deposition process when the particles in the vessel reach the dust collecting plate and the ash on the surface of the heat exchange tube provide effective support for the theoretical study of the collision and agglomeration process between particles.
  • the turbulence collision and agglomeration device can generate different forms of turbulence field through the cooperation of the spoiler column and the spoiler vortex.
  • the high-speed camera system can clearly capture the process of colliding the agglomerated plate between particles with a particle size of 2 ⁇ m or more.

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Abstract

一种温湿度可控的微米级颗粒湍流团聚的实验装置，属于温湿度可控的湍流场碰撞团聚的实验装置领域。这种温湿度可控的微米级颗粒湍流团聚的实验装置包括气粒发生装置、气粒混合加热装置、湍流碰撞团聚装置、高速摄像装置和气粒排放处理装置，该装置可实现气流速度控制在0.5-20m/s、气流温度控制在220-230℃，从而实现环境条件、温湿度可控条件下，微米尺度颗粒间的碰撞团聚实验研究工作，可有效地模拟烟气管道内颗粒沉积过程、静电除尘器内颗粒到达集尘板时的沉积过程、换热管表面积灰等实际的工业过程，同时为颗粒间的碰撞团聚过程的理论研究提供有效的支撑。

Description

一种温湿度可控的微米级颗粒湍流团聚的实验装置 技术领域
本发明涉及一种温湿度可控的微米级颗粒湍流团聚的实验装置，属于温湿度可控的湍流场碰撞团聚的实验装置领域。
 背景技术
细颗粒物沉积现象存在于能源、环境工程、化工、微电子和机械工程等众多领域。一方面，细颗粒沉积一般具有负面作用，如锅炉内换热管表面积灰导致传热恶化、透光元件上积灰会造成光通量下降（如太阳能光伏电池由于表面积灰而输出功率降低）、细颗粒在微机电系统内的沉积可能会引起机械故障或造成流动阻塞、大气细颗粒在人体呼吸道/肺泡部位沉积造成疾病等。另一方面，细颗粒沉积可以在实践中加以增强，以能源动力领域为例，通过外加声场、磁场、电场、化学团聚过程（亦称聚集过程）将细颗粒团聚成较大颗粒，从而在传统布袋或静电除尘器内有效沉积并脱除。
上述主要从宏观应用角度涉及多相流中细颗粒的沉积问题，为揭示这些过程背后物理本质，从表征微观尺度颗粒间相互作用的力-位移关系式出发，研究细颗粒间相互作用机理。两个相近粒径细颗粒相互接触的实验相对较难，因此设计实验温度和湿度可控的微米尺度颗粒之间碰撞团聚的实验装置是建立湿颗粒动力学理论必须的实验依据。
 技术问题
上述主要从宏观应用角度涉及多相流中细颗粒的沉积问题，为揭示这些过程背后物理本质，从表征微观尺度颗粒间相互作用的力-位移关系式出发，研究细颗粒间相互作用机理。两个相近粒径细颗粒相互接触的实验相对较难，因此设计实验温度和湿度可控的微米尺度颗粒之间碰撞团聚的实验装置是建立湿颗粒动力学理论必须的实验依据。
 技术解决方案
本发明的目的在于，针对现有技术中的不足，提供一种温湿度可控的微米级颗粒湍流团聚的实验装置。
本发明采用的技术方案是：一种温湿度可控的微米级颗粒湍流团聚的实验装置,它包括气粒发生装置、气粒混合加热装置、高速摄像装置和气粒排放处理装置，它还包括湍流碰撞团聚装置，所述气粒发生装置包含气瓶、质量流量计、加湿器和颗粒发生器，加湿器的喷雾器一端伸入气体混合器中，气瓶通过第一三通阀经第一支管、一个流量计连接第二三通阀，气瓶通过第一三通阀经第二支管、另一个流量计连接喷雾器，气体混合器上设置湿度仪，气体混合器通过管道经第二三通阀连接混合容器。
所述气粒混合加热装置包含混合容器和热电偶，在混合容器的外壁上设有加热元件，热电偶插入混合容器中，混合容器的入口通过管道连接气体混合器和颗粒发生器。
所述湍流碰撞团聚装置包含湍流团聚器，湍流团聚器的两侧设有观察窗，湍流团聚器的内部设置扰流柱和扰流涡片，所述扰流柱为圆柱形，扰流涡片为十字形柱状结构，扰流柱和扰流涡片在垂直气流流向的平面内直线排列，湍流团聚器的入口管道上设置第一等速取样器，出口管道上设置第二等速取样器，湍流团聚器的入口管道连接混合容器的出口。
所述高速摄像装置包含光源、高速摄像机和计算机，光源和高速摄像机设置在湍流团聚器观察窗的外侧，计算机连接高速摄像机，光源、观察窗和高速摄像机的摄像头位于同一直线上。
所述气粒排放处理装置包含静电除尘器和引风机，静电除尘器的入口管道连接湍流团聚器的出口，静电除尘器的出口管道连接引风机，静电除尘器的出口管道上设有第三等速取样器。
所述加热元件采用传热带或加热管。
所述气瓶内气体采用氮气、二氧化碳、空气中的至少一种。
 有益效果
这种温湿度可控的微米级颗粒湍流团聚的实验装置包括气粒发生装置、气粒混合加热装置、湍流碰撞团聚装置、高速摄像装置和气粒排放处理装置，该装置可实现气流速度控制在0.5-20m/s、气流温度控制在220-230℃，从而实现环境、温湿度可控条件下，微米尺度颗粒间的碰撞团聚实验研究工作，可有效地模拟烟气管道内颗粒沉积过程、静电除尘器内颗粒到达集尘板时的沉积过程、换热管表面积灰等实际的工业过程，同时为颗粒间的碰撞团聚过程的理论研究提供有效的支撑。湍流碰撞团聚装置通过扰流柱和扰流涡片配合可以产生不同形式的湍流场。另外，高速摄像系统可清晰地拍摄粒径为2μm以上颗粒间碰撞团聚板的过程。
 附图说明
图1是一种温湿度可控的微米级颗粒湍流团聚的实验装置的示意图。
图2是湍流团聚器的结构示意图。
图中：1、气瓶，1a、第一支管，1b、第二支管，2a、第一三通阀，2b、第二三通阀，3质量流量计，4、加湿器，4a、喷雾器，4b、气体混合器，5、颗粒发生器，6、加热元件，7、混合容器，8、热电偶，9、第一等速取样器，9a、第二等速取样器，9b、第三等速取样器，10、湍流团聚器，10a、观察窗，10b、扰流柱，10c、扰流涡片，11、光源，12、静电除尘器，13、引风机，14、计算机，15、高速摄像机。
 本发明的最佳实施方式
本发明的最佳实施方式同本发明的实施方式。
 本发明的实施方式
以下参照附图对本发明的装置做进一步描述。
图1示出了一种温湿度可控的微米级颗粒湍流团聚的实验装置的示意图。图中，这种温湿度可控的微米级颗粒湍流团聚的实验装置包括气粒发生装置、气粒混合加热装置、高速摄像装置、气粒排放处理装置和湍流碰撞团聚装置。气粒发生装置包含气瓶1、质量流量计3、加湿器4和颗粒发生器5，加湿器4包含喷雾器4a和混合器4b，气瓶1通过第一三通阀2a经第一支管1a、一个流量计3连接气体混合器4b，气瓶1通过第一三通阀2a经第二支管1b、另一个流量计3连接喷雾器4a，喷雾器4a的一端伸入气体混合器4b中，气体混合器4b上设置湿度仪，气体混合器4b通过第二三通阀2b连接气体排出管道。
气粒混合加热装置包含加热元件6、混合容器7和热电偶8，加热元件6设置在混合容器7外壁上，热电偶8插入混合容器7中，混合容器7的入口连接气体混合器4b的气体排出管道和颗粒发生器5的颗粒排出管道。
湍流碰撞团聚装置包含湍流团聚器10，湍流团聚器10的两侧设有观察窗10a，湍流团聚器10的内部设置扰流柱10b和扰流涡片10c。扰流柱10b为圆柱形，扰流涡片10c为十字形柱状结构，扰流柱10b和扰流涡片10c在垂直气流流向的平面内直线排列（如图2所示），湍流团聚器10的入口管道上设置第一等速取样器9，出口管道上设置第二等速取样器9a，湍流团聚器10的入口管道连接混合容器7的出口。
高速摄像装置包含光源11、高速摄像机15和计算机14，光源11和高速摄像机15设置在湍流团聚器10观察窗10a的外侧，计算机14连接高速摄像机15，光源11、观察窗10a和高速摄像机15的摄像头位于同一直线上。
气粒排放处理装置包含静电除尘器12和引风机13，静电除尘器12的入口连接湍流团聚器10的出口，静电除尘器12的出口连接引风机13，静电除尘器12的出口管道上设置第三等速取样器9b。
加热元件6是传热带或加热管。气瓶1内气体是氮气、二氧化碳、空气中的至少一种。
该装置的工作过程：打开第一三通阀2a和第二三通阀2b，迅速调整气流流量，待气流稳定后将气瓶中的氮气经喷雾器4a加湿后，与颗粒发生器5中的煤灰颗粒输送至混合容器7中，在混合容器7中对煤灰进行加热，通过第一等速取样器9采样后，进入湍流团聚器10中，煤灰颗粒在扰流柱10b和十字扰流涡片10c的作用下碰撞团聚。
将高速摄像机15与计算机14连接，更改计算机IP地址，用安装在计算机14上的高速摄像机15自带的控制软件设置摄像机参数，如分辨率、采样率和曝光时间，摄像机触发方式为延迟触发。调整高速摄像机15的焦距，使拍摄区域内成像清晰，准备拍摄湍流凝聚器内的碰撞团聚现象，将拍摄的视频保存至计算机14中，以供后续图像处理。
在湍流团聚器10的出口处布置一台颗粒采样器，收集湍流团聚器前后的细颗粒样品，观察微粒样品的微观形貌，在实验装置的末端布置了一台静电除尘器12，用于脱除细小颗粒。
气粒发生装置包含气体发生装置和颗粒发生装置，气体发生装置的气源可以是氮气、二氧化碳、空气和混合气等，根据实际情况来调整气源。气流分为两路，分别由质量流量计精确控制其流量。一路为干气体；另一路通过喷雾器产生湿气体，喷雾器可以选用由美国BGI公司研制的Collison喷雾器。两路气体进入一个安装湿度仪的气体混合器中，通过质量流量计可有效地控制干、湿两路气体的流量，从而实现进入混合容器内气体的湿度得到有效控制。此外，对混合气体，在混合容器中采用加热带或者加热管进行加热，在混合容器中安装高精度热电偶测量气流的温度，通过调压器调节加热装置的功率，气流最高加热温度可达220-230℃，从而实现有效地控制气流的温度。
湍流团聚单元的核心部分是扰流装置的设计，扰流装置由扰流柱和扰流涡片等组成，扰流柱是为了产生大尺度的湍流，扰流涡片是为了产生小尺度的湍流，其两者配合可以产生不同形式的湍流场。
高速摄像装置由高速摄像机、点光源、定焦显微镜头及计算机等组成，将摄像机与计算机相连，以存储拍摄视频。高速摄像系统可清晰地拍摄粒径为2μm以上颗粒间碰撞团聚板的过程。
该装置可实现气流速度控制在0.5-20m/s、气流温度控制在环境温度220-230℃，从而实现环境条件、温湿度可控条件下，微米尺度颗粒间的碰撞团聚实验研究工作，可有效地模拟烟气管道内颗粒沉积过程、静电除尘器内颗粒到达集尘板时的沉积过程、换热管表面积灰等实际的工业过程，同时为颗粒间的碰撞团聚过程的理论研究提供有效的支撑。
 工业实用性
这种温湿度可控的微米级颗粒湍流团聚的实验装置包括气粒发生装置、气粒混合加热装置、湍流碰撞团聚装置、高速摄像装置和气粒排放处理装置，该装置可实现气流速度控制在0.5-20m/s、气流温度控制在220-230℃，从而实现环境、温湿度可控条件下，微米尺度颗粒间的碰撞团聚实验研究工作，可有效地模拟烟气管道内颗粒沉积过程、静电除尘器内颗粒到达集尘板时的沉积过程、换热管表面积灰等实际的工业过程，同时为颗粒间的碰撞团聚过程的理论研究提供有效的支撑。湍流碰撞团聚装置通过扰流柱和扰流涡片配合可以产生不同形式的湍流场。另外，高速摄像系统可清晰地拍摄粒径为2μm以上颗粒间碰撞团聚板的过程。
 序列表自由内容
无。

Claims (3)

  1. 一种温湿度可控的微米级颗粒湍流团聚的实验装置，它包括气粒发生装置、气粒混合加热装置、高速摄像装置和气粒排放处理装置，其特征是：它还包括湍流碰撞团聚装置，所述气粒发生装置包含气瓶（1）、质量流量计（3）、加湿器（4）和颗粒发生器（5），加湿器（4）的喷雾器（4a）一端伸入气体混合器（4b）中，气瓶（1）通过第一三通阀（2a）经第一支管（1a）、一个流量计（3）连接第二三通阀（2b），气瓶（1）通过第一三通阀（2a）经第二支管（1b）、另一个流量计（3）连接喷雾器（4a），气体混合器（4b）上设置湿度仪，气体混合器（4b）通过管道经第二三通阀（2b）连接混合容器（7）；
    所述气粒混合加热装置包含混合容器（7）和热电偶（8），在混合容器（7）的外壁上设有加热元件（6），热电偶（8）插入混合容器（7）中，混合容器（7）的入口通过管道连接气体混合器（4b）和颗粒发生器（5）；
    所述湍流碰撞团聚装置包含湍流团聚器（10），湍流团聚器（10）的两侧设有观察窗（10a），湍流团聚器（10）的内部设置扰流柱（10b）和扰流涡片（10c），所述扰流柱（10b）为圆柱形，扰流涡片（10c）为十字形柱状结构，扰流柱（10b）和扰流涡片（10c）在垂直气流流向的平面内直线排列，湍流团聚器（10）的入口管道上设置第一等速取样器（9），出口管道上设置第二等速取样器（9a），湍流团聚器（10）的入口管道连接混合容器（7）的出口；
    所述高速摄像装置包含光源（11）、高速摄像机（15）和计算机（14），光源（11）和高速摄像机（15）设置在湍流团聚器（10）观察窗（10a）的外侧，计算机（14）连接高速摄像机（15），光源（11）、观察窗（10a）和高速摄像机（15）的摄像头位于同一直线上；
    所述气粒排放处理装置包含静电除尘器（12）和引风机（13），静电除尘器（12）的入口管道连接湍流团聚器（10）的出口，静电除尘器（12）的出口管道连接引风机（13），静电除尘器（12）的出口管道上设有第三等速取样器（9b）。
  2. 根据权利要求1所述一种温湿度可控的微米级颗粒湍流团聚的实验装置,其特征是：所述加热元件（6）采用传热带或加热管。
  3. 根据权利要求1所述一种温湿度可控的微米级颗粒湍流团聚的实验装置,其特征是：所述气瓶（1）内气体采用氮气、二氧化碳、空气中的至少一种。
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