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一、前言碳化法合成氨流程制碳酸氢铵是我国首创的氮肥生产新流程,产品——碳酸氢铵是我国特有的化肥产品,它的生产工艺流程简单,投资少、上马快,适宜于就地取材,遍地开放,我国各地区所建的中、小型化肥厂,大都是属于这种类型。生产碳酸氢铵的一个重要设备是碳化塔,内装冷却水箱,冷却水箱是由11根φ38×3毫米(大塔)或17根φ25×3毫米(小塔)无缝钢管冷弯焊接成的,管内通河水或地下水带走氨和二氧化碳合成时生成的热量,管外壁与生产中的气、液、固三相直接接触,设备腐蚀严重,其中最为突出的是碳化塔冷
First, the introduction of carbonation ammonia synthesis process Ammonium bicarbonate is China’s first nitrogen production process, the product - ammonium bicarbonate is China’s unique fertilizer products, and its production process is simple, less investment, quick start, suitable for on-site Drawn and open all over the country, all regions built in small and medium-sized fertilizer plants, most of them belong to this type. An important equipment for the production of ammonium bicarbonate is a carbonation tower with a built-in cooling water tank, which is made of 11 cold-formed welded steel pipes of φ38 × 3 mm (large tower) or 17φ25 × 3 mm (small tower) Through the river water or groundwater to take away the heat generated when ammonia and carbon dioxide synthesis, the outer wall of the pipe and the production of gas, liquid, solid three-phase direct contact, equipment corrosion serious, the most prominent is the carbonation tower cold