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一座国有大型化工企业——鲁北化工总厂,矗立在山东省北部的渤海湾畔。 工厂的骨干设备是一套设计年产三万吨磷铵,四万吨硫酸和六万吨水泥的三产品联产装置,简称“三四六”装置。 实现三产品联产,这里是国内第一家。其独特之处有二:一是硫酸自产自用。生产磷铵的基本原料是磷矿石和硫酸,其副产品叫磷石膏。这套装置能利用磷石膏生产硫酸;二是无三废可排。因为生产硫酸后的废渣已被制成水泥。 尤为可喜的是,这座“三四六”装置的“心脏”——回转窑,1994年连续运行达348天,创造了世界之最。全年生产磷铵44374吨、硫酸52199吨和水泥60470吨,并实现了无三废排放;产品优质率达百分之百,成本也为全国同行业最低。1994年,这套装置创利税4558万元,开创了我国磷氮肥工业高效益运行的新纪元。
A state-owned large-scale chemical company, Lubei Chemical Plant, stands on the banks of the Bohai Bay in northern Shandong Province. The backbone equipment of the factory is a three-product co-production device designed to produce 30,000 tons of ammonium phosphate, 40,000 tons of sulfuric acid and 60,000 tons of cement per year. The realization of three products co-production, here is the first domestic. There are two unique features: First, sulfuric acid is produced for its own use. The basic raw materials for producing ammonium phosphate are phosphate rock and sulfuric acid, and its by-product is called phosphogypsum. This device can use phosphogypsum to produce sulfuric acid; second, no three wastes can be discharged. Because the residue after the production of sulfuric acid has been made into cement. What is particularly gratifying is that the “heart” of this “34” installation, the rotary kiln, continued to operate for 348 days in 1994 and created the world’s best. The annual production of 44374 tons of ammonium phosphate, 52,199 tons of sulfuric acid and cement of 60,470 tons, and achieved no emissions of three waste; product quality rate of 100%, the cost is the lowest in the same industry. In 1994, this set of equipment created a profit of 45.58 million yuan, creating a new era of high-efficiency operation of China’s phosphorus and nitrogen fertilizer industry.