近年宁波地区氨制冷系统曾发生十余起较大的事故,其中有四起是因平时常被操作人员忽视的氨阀发生爆炸;阀芯卡死;法兰断裂;操作不当断致。这四家工厂都发生严重跑氨,而短期停产。有的人员受伤,货物被污损,周围居民紧急疏散,市领导亲临现场出动消防车.救护车进行抢救。这些企业均受到严重的经济损失,下面简述事故发 In recent years, Ningbo area ammonia refrigeration system has occurred more than ten major accidents, of which four are usually ignored by the operator usually ammonia valve explosion; spool stuck; flange fracture; improper operation caused. These four factories have serious run ammonia, and short-term shutdown. Some were injured, the goods were defaced, residents were evacuated urgently and the city leaders came to the scene to dispatch fire engines. These enterprises are subject to serious economic losses, the following brief description of the incident