Patent · US Expired

Method and apparatus for monitoring and controlling the drying profile in a continuous-operation multi-zone drier

US4204337A · kind A · utility

36Cited by

6References

11Claims

0Family size

Assignee

Babcock BSH Aktiengesellschaft Vormals Buttner-Schilde-Haas AG · DE

Inventors

Friedrich Roos · Bad Hersfeld, DE
Friedrich Bahner · Lengede, DE

Key dates

Filing date	May 15, 1978
Grant date	May 27, 1980
Priority date	—
Expiry date	May 15, 1998

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF26B21/06
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

Plyboard or the like passes through the successive drying zones of a multone drier, has a varying initial moisture content and presents to the drier a fluctuating degree of loading (surface area). The drying action is varied by adjusting the drying-gas temperature and/or the transport speed of the goods through the drier, so as to quickly match the drying action to the fluctuating drying demand. Instead of measuring initial moisture content per se and degree of loading (surface area) per se, temperature measurements are performed, from which equivalent information is derived, and from which in turn are calculated the values of drying-gas temperature and/or transport speed which must be set on the temperature and speed controllers of the drier.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.