Environment Treatment And Energy-saving Research In Printing Workshop

As one of the most important constituent parts of core industries for national economy, printing has kept rapid development in the century of 21.The accelerated advance of industrialization process,on the one hand, has raised higher level about printing qualities and printing production efficiencies, on the other hand, more stringent limits has been set for the discharge of contaminants such as organic exhaust gas, the loads of environment taken account.Taking the above 2points as starting point,we take one of the printing workshop working on paper printing in the city of Xi’an as study object,key points of this paper fasten on treatment and energy-saving studies on indoor and outdoor environment of the printing workshop. Several aspects of this paper are done following steps bellow:Firstly, we have got sufficient knowledge about adaptation characteristics together with their requests about temperature and relative humidity of papers, inks and other materials used for printing. Combined with thermal comfort of workers in the workshop,this paper analyzed elements who have influence on printing production, then preliminary suggestions to optimize indoor air quality and thermal environment are raised;Then, based on functional partition of the workshop, we mainly focus on the air distribution of ventilation system of the internal part in the workshop, with the help of simulation software Fluent, which belongs to CFD, the temperature and velocity field are simulated under 4different kind of wind speed conditions, and the results show that different influences have been put on the temperature and velocity field under different wind speed by the heat source in the workshop. Take overall consideration of factors such as the limitation of organic exhaust gas, thermal comfort condition of operators and energy-saving conditions, the wind speed 5m/s was chosen as the optimal parameter for air supply speed in the internal part of the printing workshop;Thirdly, on the basis of simulations of air distribution of the inner part of the workshop, this paper uses the idea of large and small zone division air-conditioning in loom workshop as reference, then explores ways to realize indoor thermal environment parameter control in as less as possible energy consume, the key points focus on new technologies such as evaporative cooling, independent temperature and humidity control and heat recovery, the entry point being air treatment for new air;Fourthly, the exhaust air will be discharged into the atmosphere environment contains the organic waste gas pollutants ingredients in the wind, to respond the compulsory provisions of environmental protection department and requirements of the printing plant, should be disposed properly. After field investigations about the surround environment of the workshop, getting enough information about present situation and development trend of air treatment technologies at home and abroad, the original proposed scheme namely taking use of the spray absorption method for the waste gas disposing is analyzed. then the respective characteristics of improvement project of environmental protection and resource recovery are compared, the rational allocation of resource and the effectiveness of reducing secondary pollution, finally, comprehensive strategies to treat organic waste gas based on activated carbon adsorption, desorption and catalytic combustion technology have been proposed;At last, this paper summarizes the research content, and points out the deficiencies and the direction of the follow-up work, pointing out that the communication and cooperation among disciplines is the key to do the system engineering of air treatment and energy saving research in printing workshop well.