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chubin555

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4. Diffusivity of chromate was taken from the literature. To test the effect of suspended solids on the rate of diffusion controlled corrosion of the impeller, porcelain particles were used. Particle size ranged from 0.3 to 0.7 mm while particle concentration ranged from 1% to 3% by volume. In order to test the effect of drag reducing polymers on the rate of diffusion controlled corrosion of the impeller, polyethylene oxide (polyox WSR-301) a product of Union Carbide was used in the form of suspension at concentrations of 200, 200, 400 and 500 ppm. The solid polymer powder has a density of
1.15¡À1.26 g/cm3, particle size ranged from less than 38 mm to larger than 500 mm. The polymer was used as received and no attempt was made to separate different sizes. The chemical stability of the polymer in acidified chromate was tested in separate experiments by adding polyox to acidified chromate solution (blank) for 1 h after which chromate concentration was determined, no change in chromate concentration was found to take place, i.e polyox is chemically stable in the solutions used in the present study. Rheological measurements showed that all polymer containing solutions were Newtonian; polymer addition in the form of solid particles to the blank solution was found to have a negligible effect on the physical properties of the solutions. Table 1 shows the physical properties of the solutions.£¨20points£©


¢ò. Translate the following paragraphs into English:
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[ Last edited by chubin555 on 2014-1-8 at 20:33 ]
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chubin555: ½ð±Ò+20, ¡ï¡ï¡ï¡ï¡ï×î¼Ñ´ð°¸ 2014-01-09 12:47:15
1. Starting with the demands from development of modern chemical engineering and high tech, the importance, diversity and complexity of chemical separation technology are discussed. New opportunities and challenges faced by chemical separation technology in the new century are analyzed.  Developmental characteristics of current chemical separation technology and our strategies are explored.
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chubin555

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2Â¥: Originally posted by befair at 2014-01-09 11:44:51
1. Starting with the demands from development of modern chemical engineering and high tech, the importance, diversity and complexity of chemical separation technology are discussed. New opportunities ...

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hanches: ½ð±Ò+2, ¸ÐлӦÖú£¬BB½±Àø~~~ 2014-01-10 19:21:28
chubin555: ½ð±Ò+30, ¡ï¡ï¡ï¡ï¡ï×î¼Ñ´ð°¸ 2014-01-10 22:22:20
4. ¸õËáÑεÄÀ©É¢ÂÊÈ¡×ÔÎÄÏס£ÎªÁ˼ìÑéÐü¸¡Îï¶ÔÓÚÒ¶ÂÖÊÜÀ©É¢¿ØÖƵĸ¯Ê´ÂʵÄÓ°Ï죬ʹÓÃÁË´ÉÁ£¡£ËüÃǵÄÁ£¶È´Ó0.3 µ½0.7mm,ͬʱÆäÌå»ýŨ¶ÈÔÚ1%µ½3%Ö®¼ä¡£Îª¼ìÑé¼õ×è¾ÛºÏÎï¶ÔÓÚÒ¶ÂÖÊÜÀ©É¢¿ØÖƵĸ¯Ê´ÂʵÄÓ°Ï죬ʹÓÃÁËÁªºÏ̼»¯Î﹫˾µÄÒ»¿î²úÆ·¾ÛÑõ»¯ÒÒÏ©£¨¾ÛÑõ»¯ÒÒÏ©WSR-301£©ÔÚŨ¶È200, 400 ¼° 500 ppmÏÂ×÷ΪÐü¸¡Òº¡£ÕâÒ»¹Ì̬¾ÛºÏÎï·ÛÌåµÄÃܶÈÊÇ1.15¡À1.26 g/cm3£¬Á£¶ÈÔÚ38mmÒÔÏ»òÕß500mmÒÔÉÏ¡£¾ÛºÏÎïÊǰ´ÊÕµ½µÄÔ­ÓÐ״̬ʹÓõ쬲¢Ã»Óг¢ÊÔ·ÖÀ벻ͬµÄÁ£¶È¡£¸Ã¾ÛºÏÎïµÄÔÚËữµÄ¸õËáÑÎÖеĻ¯Ñ§Îȶ¨ÐÔÊÇͨ¹ýÁíÍâµÄʵÑé¼ìÑéµÄ¡£ ËüÊÇͨ¹ýÔÚһСʱÄÚ¼ÓÈë¾ÛÑõ»¯ÒÒÏ©µ½ËữµÄ¸õËáÑÎÈÜÒºÖУ¨¿Õ°×£©£¬È»ºóÈ·¶¨¸õËáÑεÄŨ¶È¡£ÒòΪûÓз¢ÏÖ¸ÃŨ¶ÈÓÐÈκα仯£¬ Ò²¾ÍÊÇ˵¾ÛÑõ»¯ÒÒÏ©ÔÚ±¾¿ÎÌâÓõÄÈÜÒºÖÐÓл¯Ñ§Îȶ¨ÐÔ¡£ Á÷±äѧ²âÊÔ½á¹ûÏÔʾËùÓк¬ÓÐÈÜÒºµÄ¾ÛºÏÎï¶¼ÊÇÅ£¶ÙÐԵģ»Ïò¸Ã¿Õ°×ÈÜÒºÄÚ¼ÓÈë¹Ì̬Á£×ÓÐÎʽµÄ¾ÛºÏÎï¶Ô¸ÃÈÜÒºµÄÎïÀíÐÔÄܵÄÓ°Ïì¿ÉÒÔºöÂÔ²»¼Æ¡£ ±í1չʾÁËÈÜÒºµÄÎïÀíÐÔÄÜ¡£

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