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Wang D.,Staff Development Institute of CNTC | Lian J.,Henan University | Wang Z.,China Tobacco Henan Industrial Co. | Zhang S.,China Tobacco Henan Industrial Co. | Liu J.,China Tobacco Henan Industrial Co.
Tobacco Science and Technology | Year: 2015

Long running time, high energy consumption and high running cost are the problems associated with the air conditioning system with primary recycling air in cigarette enterprises running under coordinate regulation mode in summer. Therefore a temperature-humidity separate control method for air conditioning system based on single cold source was developed by taking cut tobacco storing room as an example,meantime, the control units of the air conditioning system was improved as following: 1) Installing another surface cooler for dehumidification control and the original surface cooler was used as the secondary cooler for cooling control. The two surface coolers were connected in series, the input cold water of the secondary cooler come from the first cooler with 3-5℃ temperature rise to implement the separate temperature-humidity control by single cold source. 2) Adding an independent fresh air dehumidifying unit in the fresh air section to change the control mode from temperature and humidity coordinate regulation to separate control in summer. The results showed that the separate temperature-humidity control method effectively avoided the cold-heat offset and energy waste in temperature and humidity coordinate regulation mode in summer, the energy consumption of air conditioning unit in dehumidification decreased by 25.5%, and the running efficiency of air conditioning system was promoted. ©, 2015, Editorial Office of Tobacco Science and Technology. All right reserved. Source


Liu J.,China Tobacco Anhui Industrial Co. | Yang B.,Staff Development Institute of CNTC | Zhou Y.,Qinhuangdao Tobacco Machinery Co.
Tobacco Science and Technology | Year: 2014

Aiming at the problems of high breakage and poor processing durability of expanded cut tobacco by traditional CO2 expanded cut tobacco processing, a steaming preconditioning discharger was added next to the expansion tower, which moistened the tobacco as it left the tower. Steam was injected into the compartments in the airlock discharger through uniformly distributed nozzles, to allow the tobacco entering into the airlock being evenly humidified and loosed. The results of application showed that after improvement, the percentage of long strands and cut tobacco yield increased by 1.5 and 0.75 percentage points, respectively. Water stained tobacco was avoided in the process of humidifying. The processing durability of expanded cut tobacco was effectively improved, while the breakage of cut tobacco was reduced. Source


Lai R.,Fujian Agriculture and forestry University | Lai R.,Longyan Branch of Fujian Provincial Tobacco Company | Lai R.,Longyan Substation of Fujian Science and Research Institute of Tobacco Farming | Liao L.,Fujian Agriculture and forestry University | And 5 more authors.
Tobacco Science and Technology | Year: 2015

In order to know the spatial distribution of Alternaria alternata (A. alternata) and the damage it caused to flue-cured tobacco of different varieties, field investigation trials were carried out systematically, and its niche characteristics in Longyan tobacco growing areas were analyzed from the points of host niche and spatial niche. The results showed that the host niche breadth of A. alternata was quite large to the trial tobacco varieties with the incidence and disease index niche breadths of 0.918 7 and 0.931 4, respectively. The varieties in the order of resistance against A. alternata were Minyan 35>CB-1>C2>Honghuadajinyuan, which indicated that the germs basically infected all the trial varieties. Moreover, its spatial niche breadth was also large. The varieties in the order of the spatial niche breadth of A. alternata incidence were Minyan 35>C2>Honghuadajinyuan>CB-1, while in the order of the spatial niche breadth of disease index were Minyan 35>CB-1>Honghuadajinyuan>C2. It suggested that the germs could fully occupy the upper, middle and lower parts of tobacco plant and cause damage to whole plant. Knowing the distribution of A. alternata and the resistance of different varieties would be helpful to its effective control. ©, 2015, Editorial Office of Tobacco Science and Technology. All right reserved. Source


Li X.,China Tobacco Henan Industrial Co. | Zhu Z.,China Tobacco Henan Industrial Co. | Xie J.,China Tobacco Henan Industrial Co. | Wang J.,China Tobacco Henan Industrial Co. | And 4 more authors.
Tobacco Science and Technology | Year: 2015

In order to reduce the difference of moisture content in output strips from the strip casing machine between batches, the casing machine was improved. To reduce the temperature fluctuation of and the casing droplets in circulated hot air, the inserted exhaust screen was replaced by a screen belt supported by side chains, a self-cleaning device for the screen belt was installed, and a set of casing droplets collecting and cleaning device was added. The results showed that the difference between moisture contents in cased strips of different batches, the extreme difference between batches decreased from 1.47 to 0.46 and was mostly controlled within ±0.5; the extreme difference of input cut tobacco to thin plate dryer between batches reduced from 1.98 to 0.58 and was mostly controlled within ±0.6. The intrinsic quality of cigarette was promoted. ©, 2015, Editorial Office of Tobacco Science and Technology. All right reserved. Source


Wang D.,Staff Development Institute of CNTC | Wang Z.,China Tobacco Henan Industrial Co. | Xie J.,China Tobacco Henan Industrial Co. | Liu J.,China Tobacco Henan Industrial Co.
Tobacco Science and Technology | Year: 2015

As a solution to the dithering of turnover body and high temperatures of hydraulic oil and driving motor, the positioning means of belt conveyor was optimized by a prior knowledge based LS-SVM (Least Square Support Vector Machine) theory. The control system for turnover body was improved by PLC programming; motor and hydraulic oil were cooled by axial flow fan and compressor refrigeration technology respectively; and the working pressure of hydraulic system was readjusted. The results showed that after improvement, the leakage of hydraulic oil and the dithering of turnover body were eliminated, the cracking in the supporting area of turnover body to the piston rod of oil cylinder decreased from 3-4 times/year to 0, the temperature of motor lowered from 65 to 44 ℃ and that of hydraulic oil lowered from 55 to 37 ℃. The failure rate of equipment was effectively reduced, while the reliability and safety of equipment running were promoted. © 2015, Editorial Office of Tobacco Science and Technology. All right reserved. Source

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