【正文】 iangsu 210048, China) Key words: ammonium phosphate (AP)。 process。 characteristic Abstract: Some information about introduced foreign pipe reaction processes for AP production in China is given。 Environmental protection issues of smallscale PA plants and scheme for control and treatment WEI Wenyan (Xixing New Chemical Technology Development Co., Ltd, Chengdu, Sichuan 610072, China) Key words: smallscale PA。 environmental protection。對(duì)反應(yīng)系統(tǒng)、過濾系統(tǒng)、淤漿輸送系統(tǒng)進(jìn)行整改以及維持濃縮系統(tǒng)平穩(wěn)操作、調(diào)整濃磷酸濃度指標(biāo)生產(chǎn) 48% P2O5Phosphate amp。 The influence of tube blocking of graphite heat exchanger on the production of phosphoric acid and its countermeasures ZHANG Qingfei, LIU Hai (Phosphoric Acid Section of Wengfu Phosphate Fertilizer Plant, Hongfu Co., Ltd, Fuquan, Guizhou 550501, China) Key words: production of phosphoric acid。 graphite heat exchanger。 countermeasure Abstract: The tube blocking of graphite heat exchanger is attributed to the solid gypsum in dilute phosphoric acid and the scars in the concentration process. Some countermeasures, including the improvement of reaction system, filtering system and silt slurry system, the maintenance of steady operation and the adjustment of phosphoric acid concentration (to 48% P2O5), have diminished the blocking of graphite heat exchanger resulted from slurry gypsum and scars. 大型磷酸貯槽攪拌方案的選擇 孫復(fù)斌 (東華工程公司，安徽 合肥 230024) ［關(guān)鍵詞］ 大型磷酸貯槽；攪拌；技術(shù)方案；方案選擇 ［摘 要］ 簡(jiǎn)述國(guó)內(nèi)及大型磷酸貯槽的攪拌技術(shù)方案，各種技術(shù)方案的比較，探討大型磷酸貯槽攪拌方案的選擇。 mixing。 selection Abstract: Several mixing technological schemes for largescale phosphoric acid tank in China are reviewed and evaluated. Then the selection of mixting scheme is discussed. 【重 鈣】 磷酸、磷礦石質(zhì)量對(duì)料漿法重鈣產(chǎn)品水溶磷的影響 胡正榮 (云南磷肥工業(yè)有限公司 磷肥廠，云南 安寧 650309) ［關(guān)鍵詞］ 重過磷酸鈣；磷酸；磷礦石；水溶磷；影響；措施 ［摘 要］ 分析磷酸、磷礦石質(zhì)量對(duì)料漿法重鈣產(chǎn)品水溶磷的影響，提出提高產(chǎn)品水溶磷的措施：控制適當(dāng)酸礦比、磷酸濃度 (42%～ 52% P2O5)、反應(yīng)溫度 (90～ 100℃ )、磷礦粒度 (80%～ 90%小于 mm)、干燥溫度 (出口物料溫度＜ 100℃ )。 phosphate rock quality on the WSP2O5 in TSP by slurry process HU Zhengrong (Yunnan Phosphate Fertilizer Industrial Co., Ltd, Anning, Yunnan 650309, China) Key words: triple superphosphate (TSP)。 phosphate rock。 measure Abstract: The effect of the phosphoric acid and phosphate rock quality on watersoluble P2O5 in granular TSP by slurry process is discussed. The measures for improving watersoluble P2O5 in product are also presented by controlling ratio of acid and rock, concentration of phosphoric acid(42% ～ 52%P2O5), reactive temperature(90～ 100℃ ), size of phosphate rock( that of less than is 80%～ 90%) and dry temperature (＜ 100℃ for dried material at outlet). 【硝酸磷肥】 Phosphate amp。由于氟的存在使物料粘度增加，結(jié)晶細(xì)小，過濾變得困難。 The influence of fluoride impurities on the nitrophosphate process ZHANG Yueting (Tianji Coal and Chemical Group Company, Lucheng, Shanxi 047507, China) Key words: fluorine。 production。著重談了在此種流程的工程設(shè)計(jì)和生產(chǎn)中應(yīng)注意的問題。 Production of MCP by mixing process GE Bin (Xiangfan Chemical Factory, Xiangfan, Hubei 441002, China) Key words: monocalcium phosphate (MCP)。 engineering design。 benefit Abstract: The feed grade DCP by wetprocess phosphoric acid production and thermalprocess phosphoric acid are as raw materials for MCP production with mixingpneumatic drying process. The engineering design of process and operation are discussed and the MCP benefits are pared, which are manufactured by 4 calcium chemicals reacting with thermalprocess phosphoric acid respectively. 【硫 酸】 硫酸生產(chǎn)中內(nèi)噴文氏管的設(shè)計(jì) 李烈棟 (湖南今天化肥化工股份有限公司 松化分公司，湖南 常寧 421513) ［關(guān)鍵詞］ 硫酸；內(nèi)噴文氏管；旋轉(zhuǎn)流；噴頭 ［摘 要］ 從分析內(nèi)噴文氏管噴頭旋流特征入手，建立有關(guān)數(shù)學(xué)模型或表達(dá)式，提出對(duì)內(nèi)噴文氏管噴頭、收縮管支管內(nèi)徑、噴嘴與喉管距離進(jìn)行設(shè)計(jì)的方法，并對(duì)設(shè)計(jì)中值得注意的問題進(jìn)行理論和實(shí)踐上的討論。 Compound Fertilizer 6 Design of Venturi scrubber with internal injection in sulfuric acid production LI Liedong (Songhua Branch, Jintian Fertilizer and Chemicals Co., Ltd, Changning, Hunan 421513, China) Key words: sulfuric acid。 swirl fluid。 Performance of pound fertilizer plant with 30 kt/a capacity XIONG Huiwen (Huaxin Chemical Stock Co., Ltd, Hexian, Anhui 238251, China) Key words: pound fertilizer。 experience Abstract: Based on some existing problems in the operation of pound fertilizer plant with 30 kt/a capacity and experiences to solve the problems, some suggestions for plant design are presented about the selection and layout of equipment, including solid conveyer, chain crusher and drier. 過磷酸鈣在高濃度復(fù)肥生產(chǎn)中的應(yīng)用 張洋球 (安慶石化 復(fù)合肥廠，安徽 安慶 246001) ［關(guān)鍵詞］ 高濃度；復(fù)混肥；生產(chǎn)；過磷酸鈣；應(yīng)用 ［摘 要］ 通過技改，在高濃度復(fù)肥生產(chǎn)中摻用一定量 (每噸產(chǎn)品加入 66kg SSP)理化性質(zhì)欠佳的過磷酸鈣，改進(jìn)了高濃度復(fù)肥的生產(chǎn)配方，每噸原料生產(chǎn)成本降低 21 元，能耗降低 6 元， 5萬噸 /年復(fù)肥廠年創(chuàng)經(jīng)濟(jì)效益 135萬元。 pound fertilizer。 single superphosphate (SSP)。 Compound Fertilizer 7 包同力 (寧夏豐友化工有限公司 ，寧夏 銀川 750021) 尿素