Process gas temperature control method for superheated steam drier

A temperature control method and technology for process gas, which are applied in the field of process gas temperature control of an air-flow filament drying machine and tobacco silk production process control, and can solve unresolved temperature fluctuations, inability to correct bypass damper setting values ​​in advance, and temperature adjustment. Lag and other problems, to achieve the effect of stable tobacco drying process, easy design and implementation, and precise adjustment

Active Publication Date: 2018-06-29
CHINA TOBACCO JIANGSU INDAL
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

None of the above control methods solves the influence of the moisture content of the incoming cut tobacco and the temperature of the combustion furnace on the temperature flu

Method used

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  • Process gas temperature control method for superheated steam drier
  • Process gas temperature control method for superheated steam drier
  • Process gas temperature control method for superheated steam drier

Examples

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specific Embodiment

[0025] The equipment selected in this example is the airflow drying machine HXD produced by Dickinson Legge Company in the United Kingdom. Moisture is 13.2%.

[0026] The concrete steps of embodiment are as follows:

[0027] A: Set basic parameters: set the standard value of incoming tobacco moisture d 标 is 22.5%, the standard value of process gas temperature c 标1 is 250°C, the standard value of the furnace temperature c 标2 is 580°C;

[0028] B: Collect real-time data: detect the real-time value of the moisture content of the incoming cut tobacco through the infrared moisture meter d 实 , the real-time value c of the process gas temperature is detected by the temperature sensor thermocouple 实1 , the real-time value c of the combustion furnace temperature is detected by the temperature sensor thermocouple 2 实2 ;

[0029] C: The real-time value c of the process gas temperature 实1 with standard value c 标1 (250°C) for real-time comparison, and the temperature PID controlle...

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Abstract

The invention discloses a process gas temperature control method for a superheated steam drier. The process gas temperature control method comprises the following steps: setting standard values of incoming tobacco water, process gas temperature and combustion furnace temperature as d<standard>, c<standard1> and c<standard2> respectively, and detecting real-time values of the incoming tobacco water, process gas temperature and combustion furnace temperature as d<real>, c<real 1> and c<real 2> respectively; respectively performing real-time comparison on the c<real 1> and c<standard1>, d<real> and d<standard> and c<real 2> and c<standard2>, and outputting the bypass air damper opening degree y1, ywater and ytemperature by virtue of a temperature PID (Proportion Integration Differentiation) controller, a water compensation module and a temperature compensation module in real time; and calculating a bypass air damper opening set value y according to a formula of y=y1+ywater+ytemperature, outputting the set value to a bypass air damper locator to be used for controlling the real-time opening of the bypass air damper. According to the method, the incoming tobacco water and the combustionfurnace temperature can be pre-judged, the set value of the bypass air damper opening can be corrected in advance, and the process gas temperature is rapidly and accurately adjusted.

Description

technical field [0001] The invention belongs to the field of tobacco processing, and in particular relates to a method for controlling the production process of tobacco shreds, in particular to a method for controlling the temperature of the process gas of an airflow type shred dryer. Background technique [0002] In the tobacco shred process, the air-flow shred dryer uses high-temperature drying gas to quickly dry, expand and shape the shredded tobacco. The high-temperature drying gas is the process gas in the shredded shredded process. and other sensory qualities. Before and after the heat exchange between the process gas of the air flow drying machine and the wet shredded tobacco, the temperature difference reaches more than 100°C, and part of the process gas is sent back to the heat exchanger in the combustion chamber through the fan and bypass damper for reheating and recycling, and the rest of the gas is recycled. emission. During the process of heat exchange and reh...

Claims

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Application Information

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IPC IPC(8): A24B3/04
CPCA24B3/04
Inventor 董伟李坤郭昌耀陆磊王峰赵轻岭孟仲王国园王嵩许秋轩
Owner CHINA TOBACCO JIANGSU INDAL
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