Pigeon Corporation

Tsukishima Kikai Co., Ltd.

Yoichi Nakata

Hiroyuki Uehara

Sumito Sato

Ryotaro Sato

Satoshi Suwa

Michiyo Kajinaga

Tomonori Watarai

Yuichi Ono

Shinichi Kataoka

Tomoki Homma

Shuko Yumino

To provide a drying method for terephthalic acid and a horizontal rotary dryer allowing easy performance of mass processing of the terephthalic acid and enabling size reduction by improving drying performance of the dryer. In a method of drying terephthalic acid by using a horizontal rotary dryer, a rotating shell is rotated to make a critical speed ratio &#x3b1; defined by expression 1 and expression 2 become 17 to less than 80% to dry the processing material,=2.21&#xbd;&#x2003;&#x2003;Expression 1&#x3b1;=&#xb7;100&#x2003;&#x2003;Expression 2

Drying method for terephthalic acid and horizontal rotary dryer

Prevention of contamination of a dried product, deformation of particles, and a change of particle size distribution. The system includes: a solid-liquid separator in which a processing material is supplied between a pair of endless separation filter cloths wound around an outer periphery of a separation roll, and is dehydrated by being squeezed therebetween and also by ventilation gas passing from a ventilation port formed in an outer peripheral surface of the separation roll; and a horizontal rotary dryer provided on a subsequent stage of the solid-liquid separator, wherein carrier gas is made to flow in a rotating shell of the dryer in a cocurrent manner in the same direction as a conveyance direction of the processing material.

Equipment for solid-liquid separation and drying of fine-powder slurry, and method therfor

To provide a drying method for processing material and a horizontal rotary dryer allowing easy performance of mass processing of the processing material and enabling size reduction by improving drying performance of the dryer. In a drying method for processing material in which a horizontal rotary dryer provided with: a rotating shell having a feed port for processing material on one end side thereof and a discharge port for processing material on the other end side thereof, and capable of freely rotating around an axial center; and a group of heating tubes through which a heating medium passes, provided within the rotating shell, and configured in a manner that the processing material is lifted up in a rotational direction by the group of heating tubes in accordance with the rotation of the rotating shell, is used, and the processing material is dried, through indirect heating, by using the group of heating tubes in a process of feeding the processing material to the one end side of the rotating shell and discharging the processing material from the other end side of the rotating shell, the rotating shell is rotated to make a critical speed ratio &#x3b1; defined by the following expression 1 and expression 2 become 30 to less than 100% to dry the processing material,=2.211/2&#x2003;&#x2003;Expression 1&#x3b1;=&#xb7;100&#x2003;&#x2003;Expression 2 wherein Vc indicates a critical speed (m/s), D indicates an inside diameter (m) of the rotating shell, &#x3b1; indicates the critical speed ratio (%), and V indicates a rotation speed (m/s).

Drying method for processing material and horizontal rotary dryer

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Growing community of inventors

Tokyo, Japan

Yoichi Nakata