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Method for measuring residence time distribution of tobacco material in processing equipment

A technology of residence time and tobacco materials, applied in the direction of measuring devices, analysis materials, instruments, etc., can solve the problems of no development, etc., and achieve the effect of short test time, small influence range and high accuracy

Active Publication Date: 2011-05-11
ZHENGZHOU TOBACCO RES INST OF CNTC +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The characteristics of the above two aspects of the tobacco industry have not yet developed a suitable method for measuring the RTD of tobacco materials in processing equipment

Method used

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  • Method for measuring residence time distribution of tobacco material in processing equipment
  • Method for measuring residence time distribution of tobacco material in processing equipment
  • Method for measuring residence time distribution of tobacco material in processing equipment

Examples

Experimental program
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Effect test

Embodiment

[0026] A certain brand of formula shredded tobacco of the company was selected on the flavoring machine of a domestic tobacco company for testing. The flow rate of the formula shredded tobacco was 2000 kg / h, and the flow rate of the expanded shredded leaf with tracer was set at 105 kg / h (that is, the instantaneous addition ratio was the total 5% of the flow rate), measured the RTD of cut tobacco in the flavoring drum under different drum speed conditions (6 rpm, 9 rpm, 12 rpm and 16 rpm) and established its model equation, of which 12 rpm was the normal production Rotating speed.

[0027] Such as figure 1 As shown, its specific implementation is as follows:

[0028] 1. The determination of RTD needs to sample and measure the tracer concentration at a certain time interval from time zero at the outlet of the equipment, and the sampling time is in seconds. The determination of the sampling amount is based on the tracer content that can represent the entire discharge section at...

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Abstract

A method for measuring residence time distribution of tobacco material in processing equipment comprises the following steps: a, a common component is selected from the tobacco material to work as a tracer to meet accuracy detection requirements; b, the tracer is added into a stably working material flow at the equipment inlet through adopting a tracing method, and response value of the variationon the concentration of the tracer along with time is detected with a certain time interval at the outlet, so as to get a residence time distribution (RTD) function; and c, the function is fitted in a nonlinear manner by a proper flowing model to get the model equation of the function, as well as the average residence time of the material and blending rate in the axial direction of the equipment.The invention has the advantages that firstly, a common component is selected from the tobacco material to work as the tracer for measuring the RTD of tobacco material in processing equipment, so that the testing time is short, the influenced area is small, the detect method has high accuracy, less influence is caused to the product quality, and no threatening is caused to the safety of consumers; and secondly, by adopting the method, the WIP (work in process) quality can be predicted, optimized, and controlled.

Description

technical field [0001] The invention relates to the technical field of tobacco processing, in particular to a method for measuring the residence time distribution of tobacco materials in processing equipment. Background technique [0002] Residence time is the time it takes for a material to pass through continuously operating processing equipment from the time it enters to the time it leaves. Each particle in the material has a corresponding residence time, that is, there is a residence time distribution (RTD). RTD is a basic parameter to characterize the performance of chemical equipment. It is mainly used for material flow in equipment and mixing related to flow, chemical reaction kinetics, heat and mass transfer and other issues. For the tobacco processing process, the RTD of tobacco materials in a certain processing equipment is closely related to the mixing quality of the process and the uniformity of the processing process (such as drying and flavoring), which in tur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/00
CPCB29C48/762B29C48/92
Inventor 堵劲松刘栋李华杰罗登炎朱文魁张炜李善莲王兵常明彬刘朝贤
Owner ZHENGZHOU TOBACCO RES INST OF CNTC
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