【正文】 到 80%～ 90%，產(chǎn)量提高 30%，產(chǎn)品外觀圓潤光滑。 ureaPK granules。 single superphosphate (SSP)。 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 威遠(yuǎn) 642450) ［關(guān)鍵詞］ 尿素；過磷酸鈣；復(fù)混肥；尿素 磷鉀粒肥；生產(chǎn)新工藝 ［摘 要］ 采用尿素與包裹后的磷鉀粒肥直接摻混，避免和解決了尿素 過磷酸鈣系復(fù)混肥生產(chǎn)中存在的一系列問題，減少了氮素的損失，提高了產(chǎn)品的市場銷售屬性，增大了企業(yè)經(jīng)濟(jì)效益。 pound fertilizer。 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。 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。 production。 Application of SSP in highanalysis pound fertilizer production ZHANG Yangqiu (Compound Fertilizer Plant of Anqing Petrochemical Company, Anqing,Anhui 246001, China) Key words: highanalysis。 operation。 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)行中存在的問題及其處理所取得的經(jīng)驗(yàn)，討論在復(fù)混肥設(shè)計中，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 )選用時應(yīng)注意的問題。 Venturi scrubber with internal injection。 Phosphate amp。 production。 mixing process。對以常見的 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評。 influence Abstract: Influence of fluorine on filtration of acidinsoluble matter, crystal and filtration of 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； 生產(chǎn)；效益 ［摘 要］ 介紹以濕法磷酸生產(chǎn)的飼料級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。 nitrophosphate。目前還沒有除去液相中氟的成熟方法，該公司是采取精料政策及一些工藝措施使生產(chǎn)基本能正常運(yùn)行。 Compound Fertilizer 5 氟對硝酸磷肥生產(chǎn)的影響 張躍庭 (天脊煤化工集團(tuán)公司，山西 潞城 047507) ［關(guān)鍵詞］ 氟；硝酸磷肥；生產(chǎn)；影響 ［摘 要］ 介紹在硝酸分解磷礦生產(chǎn)硝酸磷肥的過程中， 雜質(zhì)氟對酸不溶物過濾、硝酸鈣結(jié)晶及過濾、母液的氨中和及料漿蒸發(fā)過程的影響。 watersoluble(WS) P2O5； effect。 phosphoric acid。 The effect of PA amp。 technological scheme。 Selection of the mixing scheme in largescale phosphoric acid tank SUN Fubin (Donghua Engineering Company, Hefei, Anhui 230024, China) Key words: largescale phosphoric acid tank。 blocking。 concentration。 Compound Fertilizer 4 磷酸等措施，大大減少了淤漿、石膏、結(jié)垢對石墨列管的堵塞。 measure Abstract: The damage of exhaust gas, waste water and spent residue on environment in smallscale phosphoric acid (PA) plant is summarized based on present status of the production in China. Some feasible measures to solve the problems are presented. 石墨換熱器列管堵塞對磷酸生產(chǎn)的影響及其對策 張慶飛，劉 海 (貴州宏福總公司 甕福磷肥廠 磷酸廠，貴州 福泉 550501) ［關(guān)鍵詞］ 磷酸生產(chǎn)；濃縮；石墨換熱器；堵塞；改進(jìn)措施 ［摘 要］ 分析磷酸生產(chǎn)中石墨換熱器堵塞的原因是由稀酸中帶入固體石膏和濃縮過程中析出結(jié)垢物所造成。 production。 also a parison is made. The development of Venturitype quick reactor and its characteristics are described. 小型磷酸生產(chǎn)的環(huán)保問題及解決方案探討 魏文彥 (成都西星化工有限公司，四川 成都 610072) ［關(guān)鍵詞］ 小型磷酸；生產(chǎn)；環(huán)保問題；解決方案 ［摘 要］ 從我國小型磷酸生產(chǎn)的現(xiàn)狀出發(fā)，列舉出這些裝置的廢氣、廢水和廢渣對環(huán)境的影響和危害，并介紹解決這些問題的可靠方法。 Venturitype quick reactor。 pipereactor。 technical improvement Abstract: The technical improvement of the project of DAP production with mix process by reanizing TSP plant at Wengfu Fertilizer Plant, as well as existing problems and countermeasures during its startup of plant are summarized. 管式反應(yīng)器技術(shù)生產(chǎn)磷銨的比較及文丘里快速反應(yīng)器的開發(fā) 江壽良，陳教荃 (江蘇宏大科技開發(fā)有限公司，江蘇 南京 210048) ［關(guān)鍵詞］ 磷銨；管式反應(yīng)器；工藝技術(shù)；文丘里快速反應(yīng)器；技術(shù)特點(diǎn) ［摘 要］ 介紹國內(nèi)磷復(fù)肥行業(yè)引進(jìn)管式反應(yīng)器生產(chǎn)磷銨的情況，對這