SU1672172A1 - Apparatus for drying lumber - Google Patents

Abstract

The invention relates to drying and m. used in the woodworking industry. The purpose of the invention is to increase the drying efficiency. The device comprises a heat-insulated body 1, divided by a vertical partition 2 into sections 3 and 4. There is a manifold 11 on the partition 2, to which the air ducts 9, 10 of sections 3 and 4 are connected. The vertical partition 2 is made of corrugated material of heat-conducting material. In the process of drying, sections 3 and 4 alternately work in high-temperature or low-temperature mode. 5 il.

Description

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The invention relates to the field of drying and can be used for drying lumber of various sections, species and purpose.

The purpose of the invention is to increase the drying efficiency.

1 shows a device for drying lumber, a general view; FIG. 2 is a section A-A in FIG. one; on fig.Z - section BB in figure 1; figure 4 is a section bb In figure 1; figure 5 - section GG in figure 1.

The device comprises a heat-insulated body 1, divided by a vertical partition into two sections 3 and 4, which contain reversible circulation fans 5 and 6, heaters 7 and 8, air ducts 9 and 10 with adjustable limiters for their opening. Above the partition 2, a collector 11 is installed, and under the partition 2 a condensate collection tray 12 with a drainage tube. In sections 3 and 4, the stacks 13, 14 of the material being dried are installed, in the manifold 11 an insert 15 is installed, the air ducts 9, 10 are equipped with regulating flaps 16 and 17, respectively.

The device works as follows.

Section 3 operates with the fans 5 and heaters 7 turned on and the adjustable damper 16 closed during the first half of the drying cycle in the high-temperature mode. The circulation of the drying agent (Fig. 1) is shown by arrows. The drying agent heated by the heater 7 is fed into the stack of 13 sawn timber, where it gives off heat to the evaporated moisture and carries it away from the stack 13 to the vertical partition 2. which is made of corrugated heat-conducting material. The heat evaporated in the agent is contacted with the partition 2 and the heat is condensed and removed from the housing 1 through the condensate collecting tray 12. At this time, section 4 operates with the heaters 8 turned off, the fans 6 and the open adjustable damper 17 are turned on in low temperature mode. The drying agent in section 4 is heated by the vertical septum 2 and enters the stack 14 and further for recirculation into adjacent channels of the collector 11. The degree of saturability of the drying agent specified by the mode is regulated

opening degree of adjustable dampers

16 and 17.

Before unloading sawn timber, dried in the low-temperature section

4 to the required humidity, fans 5, 6 and heaters 7, 8 are turned off. After loading a new batch of raw material into section 4, include heaters 8 and fans 5, 6 in the opposite direction.

so that the air in section 4 is directed from the heater 8 to the stack of 14 sawn timber, and in section 3 from the vertical partition 2 to the stack of 13 sawn timber under the pressure of the fans 5, 6 (replaced

sign on the reverse), adjustable damper

17c section 4 closes and the high-temperature drying mode is established in it, and in section 3 the pressure of the fans 5 opens the adjustable flap 16, sets the low-temperature mode in which the lumber dries off during the second half of the drying cycle.

Thus, both drying sections

3, 4 alternately work in the high-temperature, then in the low-temperature mode.

In the low-temperature mode, the drying agent is not heated in the heaters, but

A vertical septum 2 is fed to the dried lumber, where evaporation from the associated moisture material occurs. A part of the treated drying agent enters the collector 11, which operates according to the counter-current principle, where it is cooled and condensed, giving heat through the adjacent walls of the shaped insert 15 to heat fresh air.

Claims (1)

Invention Formula A device for drying lumber, containing a heat-insulated body divided by a vertical partition into two sections, equipped with heaters and air ducts, characterized by that, in order to improve the drying process, an additional collector is installed above the partition wall, to which the air ducts of the sections are connected, with the collector fitted with a figured insert forming vertical adjacent channels along its entire length, and the partition is made of corrugated material of heat-conducting material. A-A 5 -6 FIG. 2 Fig. 3 LSL Fig.b gd 73 W