Application Research on Sealing Technologies of CO2 MA Granary and MA Grain Storage Technologies
The tendency of green, ecology, harmony, which is consistent with development of grain storage technologies in the world, was the goal of Chinese grain storage industries development.Such no chemical grain storage technologies as Modified Atmosphere （MA), low temperature were accord with development of grain storage technologies. Based on lots of investigation and argumentation on CO2 MA grain storage, Chinese government attached great importance on grain storage with no chemicals, and successfully constructed the first CO2 MA grain storage demonstration depot in Mianyang on December 2007. During its construction, the conventional type of Through-wall Joint-framehad been rectified to the type of double-frame, which there were no scaffold holes in warehouse wall. Special gastight insulated doors and windows, axial fan windows and gastight insulated ventilation tube had been embedded and installed. Excellent gastight materials had been chosen to seal such places as warehouse walls, peak, the connection between ground with walls, craft holes, pipelines and soon, which influenced gastight performance of granary. Upon completion, inspection on MA granary settlement was done and it met with demands of construction qualities. Gastight performance was determined MA empty and field granaries by PT experimental method, and showed that all gastight performance met the demands of CO2 MA granary, which the maximum halflife of empty granary was 490, and the minimum was 326, the maximum half-life of field granary was 497, and the minimum was 308. We could make a conclusion that the insulation performance of MA granary was better than ordinary granary by inspection on insulation performance of granary. During MA granaries application,polyurethane and acrylic had been chosen as gastight materials with excellent performance by comparison carefully in Mianyang grain depot under state grain reserves,furthermore,the test method on gastight had been improved. Since 2002, Mianyang grain depot had made experiment on CO2 MA grain storage for more than 2 years. Comparing with conventional grain storage, some researches had been carried out seriously, which focused on MA fumigation for pests control, grain qualities maintenance and so on. It had shown by experiment on CO2 MA grain storage that fumigation with CO2, at the concentration of 70%-35% for 15 days, had the same effect with the conventional fumigation with phosphine, which could control and prevent pests growth completely. As being far away from pesticide resistance, it kept accordance with demands of grain storage with no-chemicals.Because CO2 MA grain storage could postpone quality keeping period, alternation cycle and decrease the time for grain alteration, it would save lots of alteration fees and produce significant economic returns. Meanwhile, by preventing storemen far away from chemicals for grain storage, CO2 MA grain storage protect physical and mental health of storemen. Moreover,it also protected environment from chemicals contamination.and had excellent social benefits.
carbon diozide MA granary grain storage
Ma Zhongping Ma Honglin He Qile Liao Guiyong
Mianyang Grain Depot,State Grain Reserves 621000
国际会议
成都
英文
453-458
2008-09-21（万方平台首次上网日期，不代表论文的发表时间）