Study On To Effect Of Tobacco Brake And Modulation Among Different Curing Barn Type

Bulk curing barn significantly improved the quality of the tobacco leaf, reduce the quantity of baking employment and baking costs with a baking equipment of fan, automatic control of temperature and humidity. With the improvement of the barn’s concentration, energy saving and environmental protection have become increasingly prominent. The paper systematically studied four environmental protection and energy saving technology of bulk curing barn remote centralized control, central heating, waste heat sharing, calcium-based desulfurization technology, which achieve the goal of "energy saving, emission reduction, labor-saving, cost reduction". It was provided a reference for the perfection of the technology of intensive flue-cured tobacco curing barn and the development of barn equipment. The result was shown as follow:(1) The main difference of three kinds of barn type was fixer period that was38-54℃in a heating stage. The total time consuming of the underneath, medium and upper leaf in the comprehensive technical barn was more7,16,6hour than ordinary intensive barn, but less4,3and1hour than non-waste heat sharing type.(2) From labor costs and energy costs in the barking period, the total cost of dry tobacco leaf in the comprehensive technical barn were lower, the cost was about6.0yuan/kg. The possible reason was an effective heating, remote centralized control and loading tobacco capacity. The total cost of dry tobacco leaf in the non-waste heat shared barn were slightly higher, the cost was6.5yuan/kg. The total cost of dry tobacco leaf in the ordinary intensive barn were higher, the cost was8.6-13.0yuan/kg. The profits in the ordinary intensive barn had been minimal with minis all labor costs and energy costs. The differences of labor intensity in the three kinds of barn types were operator projects.(3) The oil content, chroma and identity of tobacco leaf in the comprehensive technical barn and non-waste heat sharing type was better than that of the ordinary intensive barn, the change trend in the different part of tobacco leaf was consistent. Yellow tobacco leaf ratio in the comprehensive technical barn and non-waste heat sharing type increased significantly, reduced significantly blue veins tobacco leaf, and there was no non-variegated tobacco leaf. There has more blue veins and variegated tobacco leaf in the ordinary bulk curing barn.Superior and medium ratio of tobacco leaf and average price in the comprehensive technical barn, non-residual heat shared barn was high than the ordinary intensive barn. Superior ratio of tobacco leaf in the comprehensive technical barn was higher2.3%-2.6%than non-waste heat sharing type, and higher4.8%-6.8%than in the ordinary intensive barn.(4) In the upper part of tobacco leaf of barn trial, hot and humid moisture in a given color phase of integrated technology-based barn transport to be resurgence or humidification barn, which reach steam boiler resurgence effect and effectively reduced crushing ratio of tobacco leaf. The above measurements the demand of humidity in the yellowing stage in the drought tobacco and after the autumn leaf, meanwhile, reduce the yellowing time3-7hours in the upper part of tobacco leaf, effectively reduce and avoiding the tobacco leaf of green and hanging the gray and improve the quality of the tobacco curing.(5) The sulfur content of coal cinder in the comprehensive technical barn was higher30%-50%than the ordinary intensive barn by adding sulfur-fixing agent, meanwhile, it was reduced dust emission40%to60%and could save10%-20%of coal consumption. The reduction of SO2or SO3emission could reduce the corrosion of the heat exchange system, significantly reduce the probability of the occurrence of acid rain, improve air quality and protect the ecological environment.The development and application of comprehensive technical barn was achieve the recycling of the part of energy in the bulk curing barn group, simplify the barn building; achieve the conservation of land and reduce the costs of barn construction; reduce coal consumption and baking cost; reduce flue gas emissions and promote energy conservation; achieve automatic control, relieve the fireman labor intensity and increase social benefits significantly.