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

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

Active Publication Date: 2013-07-10
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
Comparison scheme
Effect test

Embodiment

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

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

[0028] 1. The measurement of RTD requires sampling from the time zero at the outlet of the device to measure the concentration of the tracer at a certain time interval, and the sampling time is in seconds. The sampling amount is determined based on the tracer content that can represent the entire discharge section at a certain time. In order to make ...

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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 refers to the time from entry to exit of a material as it passes through continuously operating processing equipment. 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 other problems related to flow, such as mixing, chemical reaction kinetics, heat and mass transfer. For tobacco processing, the RTD of tobacco material in a certain processing equipment is closely related to the mixing quality of the process and the uniformity of the processing (such as drying and flavoring), which in turn affects the processing quality of the...

Claims

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Application Information

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Patent Type & Authority Patents(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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