Drying and gas or vapor contact with solids – Apparatus – With means to treat gas or vapor
Patent
1979-07-16
1980-09-16
Schwartz, Larry I.
Drying and gas or vapor contact with solids
Apparatus
With means to treat gas or vapor
34 48, 34119, 34125, 165 90, F26B 324
Patent
active
042221781
ABSTRACT:
The present invention is a system for controlling the blow through steam in cylindrical dryers such as those used in the paper industry. The flow rate of the condensate is measured as is the flow rate of the steam blown through the drying cylinder. The ratio of the flow rate of the blow through steam to the flow rate of the condensate is thereby measured. Knowing the conditions of the paper going through the dryer, the desired conditions of the paper leaving the dryer and the feed steam pressure, the ideal amount of condensate can be determined and a given ratio set. The difference between the actual measured ratio and the set ratio is noted by a ratio control means and a compensation made by varying the pressure in the steam/water separator which is downstream from the drying cylinder. The amount of blow through steam for a given condensing load is thereby controlled and can be minimized.
REFERENCES:
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patent: 1572448 (1926-02-01), Simons
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patent: 2811787 (1957-11-01), Clements
patent: 2869248 (1959-01-01), Justus
patent: 3156540 (1964-11-01), Baert
patent: 3251138 (1966-05-01), Whittaker
patent: 4089121 (1978-05-01), Sawyer
patent: 4106211 (1978-08-01), Holik
Midland-Ross Corporation
Negin Richard A.
Schwartz Larry I.
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