Claims
- 1. A flash dryer comprising:
- a dryer conduit arranged to provide a path for the travel of particles in said conduit under the influence of a stream of heated gas introduced into said conduit;
- said conduit having a first section providing for downwardly directed flow, a second section providing for upwardly directed flow, and a third section interconnecting said first and second sections at the bottoms thereof;
- said flash dryer having only one gas inlet nozzle, said nozzle being arranged to direct gas substantially in a direction tangent to the centerline of the conduit, and including a blower, and an air heater connected between said blower and said gas inlet nozzle and arranged to heat the air delivered by said blower and to deliver said air to said nozzle, said heater being rigidly connected to said nozzle through rigid conduit means, and means for accommodating thermal expansion of said rigid conduit means comprising means for supporting said heater while allowing floating movement of said heater with respect to said dryer conduit in the direction of, and at least to the extent of, the thermal expansion of said rigid conduit means.
- 2. A method of drying particulate matter comprising: introducing wet solid particulate matter into a conduit, introducing a single stream of heated gas into said conduit and into contact with said particulate matter therein, withdrawing dried solid particulate matter from said conduit, and withdrawing gas from said conduit wherein the rates of introduction and withdrawal of gas are the same and the rates of introduction and withdrawal of solid matter are the same, and controlling the rates of introduction and withdrawal of gas and solid matter so that the quantity per unit time of solid material passing a point in the conduit immediately following the material inlet, divided by the quantity of solid material introduced and withdrawn from the conduit per unit time is less than the quantity per unit time of gas passing a point in said conduit immediately following the gas inlet divided by the quantity of gas introduced and withdrawn per unit time.
- 3. A method of drying particulate matter comprising: introducing wet, solid particulate matter into a conduit, introducing a heated gas into said conduit and into contact with said particulate matter therein through gas nozzle means, in directions which are limited to horizontal and downward directions, withdrawing dried solid particulate matter from said conduit, and withdrawing gas from said conduit wherein the rates of introduction and withdrawal of gas are the same and the rates of introduction and withdrawal of solid matter are the same, and controlling the rates of introduction and withdrawal of gas and solid matter so that the quantity per unit time of solid material passing a point in the conduit immediately following the material inlet, divided by the quantity of solid material introduced and withdrawn from the conduit per unit time is less than the quantity per unit time of gas passing a point in said conduit immediately following the gas inlet divided by the quantity of gas introduced and withdrawn per unit time.
- 4. A flash dryer comprising:
- a dryer conduit arranged to provide a path for the travel of particles in said conduit under the influence of a stream of heated gas introduced into said conduit;
- said conduit having a first section providing for downwardly directed flow, a second section providing for upwardly directed flow, and a third section interconnecting said first and second sections at the bottoms thereof;
- said flash dryer having only one gas inlet nozzle, said nozzle being arranged to direct gas substantially in a direction tangent to the centerline of the conduit, and including a blower, and an air heater connected between said blower and said gas inlet nozzle and arranged to heat the air delivered by said blower and to deliver said air to said nozzle, said heater being rigidly connected to said nozzle through rigid conduit means and means for accommodating thermal expansion of said rigid conduit means comprising means for supporting said dryer conduit while allowing floating movement of said dryer conduit with respect to said air heater in the direction of, and at least to the extent of, the thermal expansion of said rigid conduit means.
CROSS-REFERENCE TO RELATED APPLICATION
This application is a continuation-in-part of our copending application, Ser. No. 805,833, filed June 13, 1977, now abandoned.
US Referenced Citations (7)
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
805833 |
Jun 1977 |
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