【文章內(nèi)容簡(jiǎn)介】 calcium nitrate, ammonia neutralization of mother liquor and evaporation process of slurry are discussed based on its increasing slurry viscosity, rowing fine crystal and troubling filtration in production of nitrophosphate by nitric acid deposing phosphate rock. Adopting concentrated phosphate rock raw material and making some technological improvements are feasible ways for stable operation before a reliable defluorinated technique from liquid phase is invented. 硝酸磷肥裝置粉塵回收系統(tǒng)的改造 李陽(yáng)寶，薛繼勇，尹 汾，牛 山，薄奮勇 (天脊煤化工集團(tuán)公司，山西 潞城 047507) 【飼料磷酸鹽】 混合法生產(chǎn)磷酸二氫鈣 葛 斌 (襄樊市化工廠，湖北 襄樊 441002) ［關(guān)鍵詞］ 磷酸二氫鈣；混合法；工程設(shè)計(jì)； 生產(chǎn)；效益 ［摘 要］ 介紹以濕法磷酸生產(chǎn)的飼料級(jí)磷酸氫鈣和熱法磷酸為原料，采用混合法 — 氣流烘干流程生產(chǎn)磷酸二氫鈣的方法。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(wèn)題。對(duì)以常見的 4種鈣品粉體直接與熱法磷酸混合生產(chǎn)磷酸二氫鈣的效益作了簡(jiǎn)評(píng)。 Production of MCP by mixing process GE Bin (Xiangfan Chemical Factory, Xiangfan, Hubei 441002, China) Key words: monocalcium phosphate (MCP)。 mixing process。 engineering design。 production。 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(wèn)題進(jìn)行理論和實(shí)踐上的討論。 Phosphate amp。 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。 Venturi scrubber with internal injection。 swirl fluid。 sprayer Abstract: Beginning at the characteristic analysis of swirl fluid in Venturi scrubber with internal injection, some concerned mathematical models and expressions are established. Then the design methods for the sprayer, inner diameter of shrinking pipe branch, spout and choke are presented. Some design items in theory and practice are discussed. 干燥塔的技術(shù)改造 趙 霞 (番禺鳳山實(shí)業(yè)總公司，廣東 廣州 511483) 【復(fù) 混 肥】 30 kt/a 復(fù)混肥生產(chǎn)線的運(yùn)行經(jīng)驗(yàn) 熊惠文 （安徽華星化工股份有限公司，安徽 和縣 238251) ［關(guān)鍵詞］ 復(fù)混肥；運(yùn)行；經(jīng)驗(yàn) ［摘 要］ 根據(jù) 30 kt/a復(fù)混肥生產(chǎn)線運(yùn)行中存在的問(wèn)題及其處理所取得的經(jīng)驗(yàn)，討論在復(fù)混肥設(shè)計(jì)中，設(shè)備的平面布置、設(shè)備 (如固體輸送機(jī)、鏈磨機(jī)、烘干機(jī)等 )選用時(shí)應(yīng)注意的問(wèn)題。 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。 operation。 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(guò)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(guò)磷酸鈣；應(yīng)用 ［摘 要］ 通過(guò)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(guò)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(wàn)噸 /年復(fù)肥廠年創(chuàng)經(jīng)濟(jì)效益 135萬(wàn)元。 Application of SSP in highanalysis pound fertilizer production ZHANG Yangqiu (Compound Fertilizer Plant of Anqing Petrochemical Company, Anqing,Anhui 246001, China) Key words: highanalysis。 pound fertilizer。 production。 single superphosphate (SSP)。 application Abstract: Through experiment, a modified formula is given of 66 kg SSP raw material with poor physicochemical property in per ton finishing product of highanalysis pound fertilizer, which results in decreasing 21 RMB Yuan raw material cost and 6 RMB Yuan energy consumption. So, annual economic benefit of million RMB Yuan will be brought for pound fertilizer plant with 50kt/a capacity. 低溫下熔融原料生產(chǎn)復(fù)合肥 Phosphate amp。 Compound Fertilizer 7 包同力 (寧夏豐友化工有限公司 ，寧夏 銀川 750021) 尿素 過(guò)磷酸鈣系復(fù)混肥“析晶”的原因及預(yù)防措施 張志勇，李志遠(yuǎn) (山東農(nóng)業(yè)專用肥料廠，山東 齊河 251121) ［關(guān)鍵詞］ 尿素；過(guò)磷酸鈣；復(fù)混肥；析晶；規(guī)律 ［摘 要］ 尿素 過(guò)磷酸鈣系復(fù)混肥料在夏季存放時(shí)易出現(xiàn)“析晶”現(xiàn)象，導(dǎo)致產(chǎn)品粉化而帶來(lái)經(jīng)濟(jì)損失 ，對(duì)該問(wèn)題進(jìn)行初步的原因分析，并提出幾種預(yù)防措施。 The cause of crystal precipitation in pound fertilizer based on ureaSSP and its preventive measures ZHANG Zhiyong, LI Zhiyuan (Shandong Agricultural Specialty Fertilizer Plant, Qihe, Shandong 251121, China) Key words: urea。 single superphosphate (SSP)。 pound fertilizer。 crystal precipitation。 rule Abstract: In summer storage, pound fertilizer based on ureaSSP is likely to crystal precipitation and crash, leading to economic loss to the producer. The causes are examined and several countermeasures are presented. 尿素 過(guò)磷酸鈣系復(fù)混肥料生產(chǎn)的一種新工藝 董 彬 (四川康達(dá)集團(tuán) 復(fù)合肥廠，四川 威