Tsukishima Kikai Co., Ltd.

Satoshi Suwa

Sumito Sato

Yoichi Nakata

Keisuke Matsuda

Tomonori Watarai

Masaki Kataoka

Yuichi Ono

Tomoki Homma

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

Provided is an indirectly heating rotary dryer which has achieved enhanced energy-saving performance by reducing heating tubes non-contacting with material to be dried and reducing power required for rotation even when a hold up ratio is increased. Specifically provided is an indirectly heating rotary dryer having four partition wallsextended respectively along an shaft center C in an inner space of a rotating shellat angle intervals of 90 degrees in the vertical and horizontal directions. The four partition wallspartition the inner space of the rotating shellat a lateral section of the rotating shellinto four approximately-sector-shaped small spaces K respectively extended along the shaft center C. Heating tubesare aligned in the rotating shellin three lines extended respectively in parallel to the shaft center C of the rotating shell. The heat tubesheat and dry the material H to be dried by supplying heated steam to the heating tubesand performing heat exchange with the material H to be dried in the rotating shell

Indirectly heating rotary dryer

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

Provided is an indirectly heated rotary dryer which has achieved enhanced energy-saving performance by reducing heating tubes non-contacting with material to be dried and reducing power required for rotation even when a hold up ratio is increased. Specifically provided is an indirectly heated rotary dryer having four partition walls extended respectively along a shaft center in an inner space of a rotating shell at angle intervals of 90 degrees in the vertical and horizontal directions. The four partition walls partition the inner space of the rotating shell at a lateral section of the rotating shell into four approximately-sector-shaped small spaces respectively extended along the shaft center. Heating tubes are aligned in the rotating shell in three lines extended respectively in parallel to the shaft center of the rotating shell. The heat tubes heat and dry the material to be dried by supplying heated steam to the heating tubes and performing heat exchange with the material to be dried in the rotating shell.

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Tokyo, Japan

Satoshi Suwa