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Device for monitoring spatial evaporation characteristic of micro-droplets in high-temperature airflow on line

A high-temperature airflow and micro-droplet technology, which is applied in the field of high-temperature devices for the evaporation of micro-droplets in scientific research, can solve the problems of insufficient reaction between flue gas and slurry in the tower, large fluctuation range, and less research on evaporation characteristics. Protection from high temperature damage, excellent performance

Pending Publication Date: 2020-05-08
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main problems of this technology are: serious dust accumulation in the desulfurization tower, corrosion of equipment in the tower, insufficient reaction of flue gas and slurry in the tower, and SO 2 The concentration is unstable and the fluctuation range is large
[0006] At present, most studies on the evaporation law of micro-droplets use the analysis methods of hanging drop method, heating plane evaporation, thermogravimetric analysis and evaporation coefficient, without considering the particle size and three-dimensional space changes of the actual micro-droplets, and without considering the influence of gravity on micro-droplets. The influence of motion, without considering the convective heat transfer of liquid droplets in the evaporation process in high-temperature airflow
In addition, most of the research focuses on the atomization and evaporation of micro-droplet spray. There are few studies on the evaporation characteristics of a single micro-droplet in a heated atmosphere, and there is still a lack of dynamic process of gas-liquid reaction of micro-droplets. Research

Method used

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  • Device for monitoring spatial evaporation characteristic of micro-droplets in high-temperature airflow on line
  • Device for monitoring spatial evaporation characteristic of micro-droplets in high-temperature airflow on line
  • Device for monitoring spatial evaporation characteristic of micro-droplets in high-temperature airflow on line

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Effect test

Embodiment 1

[0048] Such as figure 1 As shown, this embodiment provides a device for on-line monitoring of the space evaporation characteristics of micro-droplets in high-temperature airflow, the device includes an air intake system, a heating system, a temperature control system, a micro-droplet injection system, an amplified digital simultaneous Shaft holographic measurement system and cooling water circulation system. The specific structure is as follows:

[0049] In the air intake system, it includes a gas cylinder 1, a pressure reducing valve 2, a gas electronic flowmeter 3, an industrial hot air blower 4, an induced draft fan 9, and an air volume regulating valve 10 installed at the entrance of the induced draft fan. The gas cylinder 1 is filled with Gas, the pressure reducing valve 2 is located on the gas discharge pipeline, the gas electronic flowmeter 3 is used to control the flow of the gas, and the industrial heater 4 is used to preheat the gas. Temperature setting and automat...

Embodiment 2

[0059] The device for on-line monitoring of the space evaporation characteristics of the micro-droplets in the high-temperature airflow of Example 1 is used, and the clear liquid of desulfurization wastewater is used as the test sample. The specific operation steps are as follows:

[0060] (1) Put the filtered desulfurization wastewater clear liquid in the liquid storage bottle, turn on the air pressure controller and the electric drive controller, and fix the nozzle at the through hole in the center of the cooling aluminum ingot.

[0061] (2) Open the cooling water tank 5 to circulate the cooling water to ensure that enough cooling water flows through the cooling aluminum ingot to protect the nozzle.

[0062] (3) Connect the gas pipeline, pass in the required gas, turn on the hot air blower 4, heat the inlet gas to the required preheating temperature, turn on the induced draft fan 9, and keep the furnace in a negative pressure state.

[0063] (4) Place the precision electric ...

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Abstract

The invention provides a device for monitoring the spatial evaporation characteristic of micro-droplets in high-temperature airflow on line, and the device comprises a heating system which is providedwith a heating hearth and a heating element installed in the heating hearth; transparent observation windows, arranged on two opposite sides of the heating hearth, and a gas inlet and a gas outlet being respectively formed in the top and the bottom of the heating hearth; a gas inlet system, connected to the gas inlet of the heating hearth through a pipeline and used for providing atmosphere required in the furnace and controlling the gas flow rate and the gas preheating temperature in the furnace, so that the interior of the furnace is in a negative pressure state; a micro-droplet jetting system, comprising a micro-droplet nozzle arranged at the top of the heating hearth and used for generating micro-droplets; a holographic measurement system, used for measuring the evaporation conditionof the micro-droplets in the furnace body in the vertical falling process and recording holographic images. The device comprises a laser generator for emitting micro-droplet irradiation light beams, an electric lifting platform for driving the laser generator, and a camera for collecting holographic images.

Description

technical field [0001] The invention relates to a high-temperature device for scientific research on micro-droplet evaporation in the fields of energy, combustion, and environmental protection, and in particular to a device for on-line monitoring of space evaporation characteristics of micro-droplets in high-temperature airflow. Background technique [0002] In the fields of energy, combustion, and environmental protection, etc., the evaporation process of micro-droplets is often involved. In industrial applications, the evaporation process of micro-droplets plays an extremely important role in the treatment of desulfurization wastewater using flue waste heat, rotary spray drying, selective non-catalytic reduction denitrification technology, and the combustion of liquid fuel droplets. The research on the evaporation process of micro-droplets with different physical properties is a difficult point in the study of the mechanism of the evaporation process. Therefore, there is a...

Claims

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Application Information

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IPC IPC(8): G01N21/84
CPCG01N21/84
Inventor 周昊宋依璘
Owner ZHEJIANG UNIV
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