Analysis of the surface quality of sulphur-coated urea particles in a two-dimensional spouted bed

被引：19

作者：

Ayub, GSE ^{[1
]}

Rocha, SCS ^{[1
]}

Perrucci, ALI ^{[1
]}

机构：

[1] UNICAMP, Fac Engn Quim, Dept Termofluidodinam, BR-13083970 Campinas, SP, Brazil

来源：

BRAZILIAN JOURNAL OF CHEMICAL ENGINEERING | 2001年 / 18卷 / 01期

关键词：

spouted beds; coating of particles in spouted beds; sulphur coating of urea;

D O I：

10.1590/S0104-66322001000100002

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

In this work the quality of sulphur-coated urea was determined by the urea dissolution rate and analysed by electron microscopy. Particles of urea were coated in a two-dimensional spouted bed, having a 60 degrees slanted base angle and an atomization nozzle installed at the base. Elementary sulphur was liquefied and atomized on the particles. The experiments were planned with the objective of verifying the influences of flowrates of sulphur and atomized air and the temperature of the air used in the spouted bed on the quality of the coated particle surface. The temperature of the spout air and the flowrate of the atomized air showed a significant influence on the quality of the coating.

引用

页码：13 / 22

页数：10

共 9 条

[1]

Box G.E., 1978, STAT EXPT

[2]

Gishler P. E., 1957, Patente, Patent No. [2786280, 2786280(A)]

[3]

KALWAR ML, 1988, LARGE SCALE 2 DIMENS, P69

[4]

MEISEN A, 1978, 2 INT C FERT P BRI 1, P2

[5]

MUJUMDAR AS, 1984, DRYING 84, P151

[6]

PASSOS ML, 1991, THESIS MCGILL U MONT

[7] SULFUR COATING ON NITROGEN FERTILIZER TO REDUCE DISSOLUTION RATE [J].

RINDT, DW ;

BLOUIN, GM ;

GETSINGER, JG .

JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY, 1968, 16 (05) :773-+

[8]

SANDER HHF, 1984, SULPHUR SULPHUR DIOX

[9]

WEISS PE, 1983, CAN J CHEM ENG, V50, P440

← 1 →