天然气净化厂事故废水收集处理系统设计

近年来，频发的石化事故所产生的废水给水体环境造成了严重污染。针对重庆市某天然气净化厂事故，在调查事故废水种类和水量的基础上，根据厂区现有排水系统、生产工艺及平面布置情况，采用大围堰的形式对1 114 m3事故废水进行收集；然后通过厂区现有及拟建排水系统将其送至事故池进行储存；最终利用潜污泵将废水提升至厂区污水处理单元进行处理，有效减少事故废水对于环境的影响。 The accidental wastewater collection and disposal scheme of a natural gas purification plant in Chongqing was introduced, according to the severe pollution of water environment caused by the petrochemical industry accidents which happen frequently in recent years and the documentation requirements of an emergency notice about urging the petrochemical enterprise to carry out several security and environmental protection key works which was issued by the State Production Safety Supervision Administration and the State Environmental Protection Administration in 2006. First, the type and quantity of accidental wastewater were determined, and the accidental wastewater of 1114 m3 was collected using the big cofferdam based on the conditions of existing drainage system, manufacturing technique, and layout of the factory. Secondly, the accidental wastewater was sent to the accidental pool for storage through the existing and proposed drainage systems. Finally, the accidental wastewater was treated by the wastewater treatment unit in the factory through lifting of submersible sewage pump, which can reduce the impacts of accidental wastewater on water environment.