Air cooled rotary kiln collar
AssigneePPG Industries, Inc.
InventorsRobert B. Heithoff, John K. Groetzinger
Life of this patent
Estimating the term…
Abstract
An air cooled rotary kiln collar for use in improving the delivery of preheated charge material from the rotary kiln to the second stage of a multi-stage heating process. Adjustable rate fans circulate air through an annular collar at the discharge end of the rotary kiln to remove heat from the charge material and prevent it from agglomerating and sticking to the kiln.
Claims5
A heat exchanger for controlling the temperature of preheated pulverulent material at the discharge end of a rotary kiln comprising:
- an outer cylindrical shell with a radially inwardly disposed cylindrical inner wall;
- a refractory liner disposed radially outward from said wall and between said shell and said wall so as to form a longitudinally extending annular chamber between said liner and said wall;
- cooling air inlets at a first end of said chamber;
- cooling air outlets at a second end of said chamber longitudinally opposed from said inlet;
- at least one blower to blow cooling air into said inlet such that said air passes through said chamber and exits said heat exchanger through said outlets wherein said air extracts heat from said material;
- means to monitor the temperature of said material;
- and
- a slide gate positioned between said blower and said air inlets such that said slide gate can regulate air flow into said air inlets so as to maintain said material below a temperature at which portions of said material will agglomerate prior to discharge from said rotary kiln.
A heat exchanger for controlling the temperature of preheated pulverulent material at the discharge end of a rotary kiln comprising:
- an outer cylindrical shell with a radially inwardly disposed cylindrical inner wall;
- a refractory liner disposed radially outwardly from said wall and between said shell and said wall so as to form a longitudinally extending annular chamber between said liner and said wall;
- cooling fluid inlets at a first end of said chamber;
- cooling fluid outlets at a second end of said chamber longitudinally opposed from said inlets;
- means for introducing cooling fluid into said inlets such that said fluid passes through said chamber and exits said heat exchanger through said outlets wherein said cooling fluid extracts heat from said material;
- means to monitor the temperature of said material;
- a slide gate positioned to regulate flow of said cooling fluid through said chamber so as to maintain said material below a temperature at which portions of said material will agglomerate prior to discharge from said rotary kiln;
- and
- means responsive to said temperature monitoring means to control said introducing means.
Dependencies are inferred from the claim text.