Principles of lumber-drying and practical advice to dry kiln operators; by Andrews A. H. company Chicago

Author:Andrews, A. H., company, Chicago. [from old catalog]
Language: eng
Format: epub, pdf
Tags: Lumber
Publisher: Chicago
Published: 1914-03-25T05:00:00+00:00

= is the same, and in either case is governed by the age, species and jl thickness of the lumber.

(96) The steam spray must be turned on immediately after i= fresh lumber has been placed into the kiln, in order that the surround-= ing air may become ''saturated" with moisture as quickly as possible, HI and before the kiln temperature can communicate to the lumber.

(97) In Box or Charge kilns the heating coils must be almost B "shut off" when fresh lumber is placed into the kiln and the "first B warming up" of the lumber shall be by the live steam of the spray, HI except that a small amount of steam may be passed through the B steam coils to prevent the condensation thereon of the moisture. If B this does not prove sufficient to bring the kiln temperature to the B desired degree, then more steam may be gradually admitted to the B heater coils, until the correct temperature has been reached.

(98) In the case of "Compartment" or "Box" type kilns all Hi air supply and removal openings must be tightly closed during the B steaming process. This is important.

H (99) The length of time during which the wood must be g

B "steamed" preparatory to drying will depend upon the length of

§| time which has passed since the lumber has been cut, upon the species g

B of wood and the thickness of the lumber, and is set forth in detail

jjl in the appended Drying Schedules.

jl Actual Drying

(100) After the steaming period, the lumber must be moved U forward, in the case of "Progressive" type kilns, into air of higher

B temperature, less humidity and greater circulation as per proper |g §§ schedule for the species of thickness of the lumber being dried.

(101) In the case of "Compartment" or "Box" kilns the B temperature and circulation are increased and humidity is reduced B as per respective schedule.

(102) Correct progress of drying requires that from the time = Hj when steaming of the wood ends and actual drying begins the tern- j|

■

Download

Copyright Disclaimer:
This site does not store any files on its server. We only index and link to content provided by other sites. Please contact the content providers to delete copyright contents if any and email us, we'll remove relevant links or contents immediately.