Humidifying system of tobacco on-line processing roller type humidifying device

Abstract

The invention discloses a humidifying system of a tobacco on-line processing roller type humidifying device. The humidifying system comprises a humidifying water heating device and a humidifying application device. The humidifying application device comprises a front ring water adding pipeline, a rear ring water adding pipeline and water adding independent control systems of the front ring water adding pipeline and the rear ring water adding pipeline. A weight signal and a moisture meter detection signal obtained before materials enter the humidifying device are used as hot water application control signals of a front nozzle, and then single feed front ring control is achieved; a moisture meter detection signal obtained after the materials leave from the humidifying device is used as a hot water proportion application control signal of a rear nozzle of the humidifying device, and then single feed rear ring control is achieved; humidifying water achieves automatic heating and temperature control. The front nozzle and the rear nozzle of the humidifying system are independently controlled in a single feed mode, the automatic, rapid and timely non-difference control over the calculating and water adding process is achieved in a full numerical control mode, and tobacco moisture is uniform after the tobacco is humidified; Due to the fact that the humidifying water achieves automatic heating and temperature control, seasonal variation tobacco moisture control uniformity can be achieved, and the on-line homogeneity level of the tobacco is improved.

Description

technical field [0001] The invention relates to the field of tobacco processing, in particular to a humidification system of cylinder type humidification equipment for on-line tobacco processing. Background technique [0002] At present, the tobacco industry relies on dual-medium nozzles (hereinafter referred to as nozzles) to apply normal temperature liquid water to the tobacco materials through the injection of the ejection medium to increase the temperature and humidity of the tobacco materials. In order to ensure the homogenization of the materials, the current common method It is: a nozzle front and back feed dual-loop control normal temperature liquid water humidification method, that is, the weight signal of the electronic scale in front of the humidification equipment and the detection signal of the moisture meter in front of the humidification equipment are used as the basic feed-forward signal, and the detection signal of the moisture meter at the outlet of the humi...

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Problems solved by technology

[0002] At present, the tobacco industry relies on dual-medium nozzles (hereinafter referred to as nozzles) to apply normal temperature liquid water to the tobacco materials through the injection of the ejection medium to increase the temperature and humidity of the tobacco materials. In order to ensure the homogenization of the materials, the current common method It is: a nozzle front and back feed dual-loop control normal temperature liquid water humidification method, that is, the weight signal of the electronic scale in front of the humidification equipment and the detection signal of the moisture meter in front of the humidification equipment are used as the basic feed-forward signal, and the detection signal of the moisture meter at the outlet of the humidification equipment is used as the back-feed signal. Realize double-loop control, the rear loop corrects the front loop, and realizes the double-feed control signal. After calculating the flow rate, the flow signal is compared with the flowmeter to calculate the output digital signal, and the signal is converted into an analog signal through digital-to-analog conversion to control the opening of the membrane valve of the humidification system. The automatic control of the amount of water added has the following three problems: 1. Applying normal temperature liquid water, it is easy to be affected by the temperature change of normal temperature water caused by seasonal changes, resulting in different seasonal water penetration activities, resulting in the internal freedom of tobacco seasonal materials. water difference

2. Using one nozzle double ring to control the amount of water added has disadvantages no matter how the nozzle installation position is determined: A. The nozzle is installed at the inlet end, and the hysteresis correction of the back-feed control loop leads to differences in control factors, thereby amplifying the fluctuation range of material moisture control ; B. The nozzle is installed at the outlet end, and the timeliness of the back-feed control loop is reflected, but the post-feed humidification is reflected in the amplified influence of the water volume and uniformity on the surface of the material (the material is not fully tumbling, mixed and infiltrated during the water addition process)

3. After the flow is calculated by the double-feed control signal, the opening of the membrane valve of the humidification system is controlled after the comparison and calculation of the flow signal of the flow meter (the opening must be controlled by an analog signal, and the signal for detecting the opening is also an analog signal) to realize the water addition. Automatic control, there is signal conversion (mutual conversion between digital signal and analog signal), and then there is signal attenuation or amplification, and the whole humidification process is dynamic, so there is hysteresis and inaccuracy

None of the above can humidify the tobacco material uniformly in a timely manner, and the homogeneity of humidification has not been achieved

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