Check patentability & draft patents in minutes with Patsnap Eureka AI!

Method for measuring macromixing time in strong electrolyte solution and application of method

A strong electrolyte and mixing time technology, applied in the direction of material excitation analysis, fluorescence/phosphorescence, etc., can solve the problems of weak luminescence of tracers, low luminous efficiency, and inability to measure mixing time, so as to achieve convenient data processing and easy acquisition , the effect of simple operation

Active Publication Date: 2013-10-23
INST OF PROCESS ENG CHINESE ACAD OF SCI
View PDF8 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The system uses anthracene, naphthalene or organic compounds containing anthracene and naphthyl as tracers. Such tracers have weak luminescence, low luminous efficiency, and are insoluble in water, so they cannot be used for the measurement of mixing time in strong electrolyte aqueous solutions.
In addition, the excitation light of the system overlaps with the generated low-light bands, making it difficult to effectively separate the excitation light and low-light

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for measuring macromixing time in strong electrolyte solution and application of method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1. For the strong electrolyte system, NaCl solution is used as the liquid phase in a cylindrical flat-bottomed open single-phase stirred tank with an inner diameter of 240 mm and a height of 428 mm. The liquid height in the tank is 240mm, and four vertical baffles with a width of 24mm are installed at equal intervals on the tank wall. The stirring paddle is a Rushton paddle with a diameter of 80mm, and the height of the stirring paddle from the bottom is 80mm. The concentration of NaCl is very high and it is a strong electrolyte solution (2100μs / cm-2600μs / cm). Experiments show that the macroscopic mixing time of this strong electrolyte solution cannot be measured by the conductivity method. The fluorescent tracer is added in the middle of the two baffles on the liquid surface of the stirring tank near the tank wall, and the optical fiber probe is placed at a position 10mm below the counterwater surface. When the difference between the fluorescent output signal...

Embodiment 2

[0031] Embodiment 2. For the strong electrolyte system, in a cylindrical flat-bottomed open liquid-solid stirring tank with an inner diameter of 240mm and a height of 428mm, use KNO 3 The solution is used as the continuous phase, and the quartz sand with a mass fraction of 0.5% is used as the dispersed phase. The liquid height in the tank is 240mm, and four vertical baffles with a width of 24mm are installed at equal intervals on the tank wall. The stirring impeller is a six-bladed semicircular tube disc turbine impeller with a diameter of 80mm, and the height of the stirring impeller from the bottom is 80mm. KNO 3 The concentration is very high and it is a strong electrolyte solution (2000μs / cm-2300μs / cm). Experiments show that the macroscopic mixing time of this strong electrolyte solution cannot be measured by the conductivity method. The fluorescent tracer is added in the middle of the two baffles on the liquid surface of the stirring tank close to the tank wall, and the ...

Embodiment 3

[0035] Embodiment 3. For strong electrolyte system, in the cylinder flat-bottomed open liquid-liquid agitation tank of internal diameter 240mm, high 428mm, use Na 2 SO 4 The solution was used as the continuous phase, and the kerosene with a volume fraction of 7% was used as the dispersed phase. The liquid height in the tank is 240mm, and four vertical baffles with a width of 24mm are installed at equal intervals on the tank wall. The stirring impeller is a 45° six-blade push-down inclined blade impeller with a diameter of 80mm, and the height of the stirring impeller from the bottom is 80mm. Na 2 SO 4 The concentration is very high and it is a strong electrolyte solution (2300μs / cm-2700μs / cm). Experiments show that the macroscopic mixing time of this strong electrolyte solution cannot be measured by the conductivity method. The fluorescent tracer is added in the middle of the two baffles on the liquid surface of the stirring tank near the tank wall, and the optical fiber pr...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Wavelengthaaaaaaaaaa
Center wavelengthaaaaaaaaaa
Login to View More

Abstract

The invention relates to a method for measuring macromixing time in a strong electrolyte solution in reactors such as single-phase and multiphase stirring tanks and circulation flow reactors, and application of the method. The macromixing time is used for evaluating the efficiency of the reactors. A system is characterized in that a computer (8) is directly connected with a spectrograph (5); a fiber probe (1) connected with the spectrograph through an output optical fiber (7) is mounted in a reactor (9) and directly contacts a material with a tracing agent in the reactor; monochromatic light generated by a light source (3) and filtered by an optical filter (4) is transmitted to the tail end of the fiber probe (1) by an input optical fiber (6) to light liquid in a window in the tail end of the fiber probe; an optical grating is mounted in the spectrograph and can be used for filtering irradiation light and only remaining fluorescence signals. The fluorescence intensity received by the fiber probe is in a linear relation with the concentration of the tracing agent, and the mixing time of the strong electrolyte solution can be measured by virtue of output signals acquired by the computer. The measuring method has the advantages that the test cost is low, that the measurement process is simple to operate, and that data is convenient to process.

Description

technical field [0001] The invention belongs to the measurement method of macroscopic mixing time in reactors such as stirring tanks and loop reactors in the fields of petroleum, chemical industry, energy and metallurgy, and is particularly suitable for chemical unit operations involving strong electrolyte aqueous solutions. Background technique [0002] Chemical reactors such as stirred tanks, loop reactors and bubble columns involving strong electrolytes are widely used in petrochemical and other process industries. In the mixing operation of strong electrolytic aqueous solutions, the hydrodynamic state in the reactor controls the mixing process of materials , and the mixing state of materials usually directly determines the rate of heat transfer, mass transfer and chemical reaction. Therefore, the state of liquid mixing is of great significance for the design, optimization and scale-up of reactors. [0003] The mixing process can be divided into macroscopic mixing, mesos...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G01N21/64
Inventor 杨超程荡张伟鹏冯鑫程景才李向阳毛在砂
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com