SU1390497A1 - Drying chamber - Google Patents

Abstract

Invention m. used in the lumber drying technique in the woodworking industry, using chamber drying of materials under reduced pressure of the medium. The purpose of the invention is to reduce energy / J-L costs when vacuum drying lumber in piles. For this, the drying chamber is equipped with additional heat pipes 9, the evaporation zones of which are brought out of the chamber, and the condensation zones are connected to the evaporation zones of the heat pipes 2, located at the contact point with the material, also made in the form of a heat pipe system. Chabel-P1materials are formed on the trolley outside the chamber, with each row or several rows of lumber placing the condensation zones of the heat pipes 2. The stack is placed into the chamber. The pipes 9 are connected to the pipes 2, the chamber being sealed. This chamber design allows pre-laying the pipes between the lumber. 5 il. g (L

Description

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The invention relates to the technique of drying lumber and can be used in the woodworking and woodworking fields using chamber drying materials under reduced pressure of the medium.

The purpose of the invention is to reduce energy consumption during vacuum drying of sawn timber in piles by pre-laying pipes between the sawn timber.

FIG. 1 shows schematically a vacuum chamber for sawn wood; in fig. 2 is a cross section of an atL in FIG. I; FIG. 3 shows heat pipes in contact with sawn timber; in fig. And - the connecting coupling; in fig. 5 is a section BB in FIG. BUT.

The drying chamber contains a housing 1 and accommodates heat pipes 2 therein, the condensation zones 3 of which are located in contact with the material laid in the stack 4, and the evaporation zones 5 are outside the material. The chamber is also equipped with a vacuum pump 6, a condenser 7 and instrumentation 8. The chamber is equipped with additional heat pipes 9, the evaporation zones 10 of which are brought outside the chamber, and the evaporation zones 5 are connected to heat pipes 2 by means of connecting sleeves 12 and 13, made in the form of a system of heat pipes 14. The chamber also has a device 15 for draining condensate.

The camera works as follows

A stack of sawn timber is formed on the outside of the chamber, and each row or several rows of sawn timber contain 3 condensation zones of heat pipes 2. The stack is placed in the chamber. Heat pipes 9 are connected to heat pipes 2 by means of couplings 12 HI-IB. The chamber is sealed. The pressure of the medium in the chamber by means of a vacuum pump is compared to the value at which the boiling point

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water is lower than the ambient temperature outside the chamber. In this case, heat is supplied to the material from the medium outside the chamber due to the temperature gradient of the surrounding medium and material. Heat from the ambient chamber is removed when the heat carrier heat pipe 9 evaporates in their evaporation zones 10 and is released when the heat carrier condenses in the condensation zones 11. The heat released is absorbed by the coolant, which evaporates in the evaporation zones of these heat pipes 14 connecting sleeves 12 and 13. The condensation in the condensation zones of the heat pipes 14 connecting sleeves is transferred by the coolant, which is normally absorbed by the heat carrier coolant 2, and the coolant evaporates in evaporation zones 5. Condensing in zones 3 of condensation of heat pipes, the coolant releases heat to the material being dried. The heat generated by the material is consumed to evaporate the moisture contained in the material. The vapor released from the material is condensed on vapor condensers 7 and in liquid form is removed outside the chamber through the device 15.

Claims (1)

Invention Formula A drying chamber containing a housing and placed heat pipes, the condensation zones of which are in contact with the material and the evaporation zones outside the material, characterized in that, in order to reduce energy consumption during vacuum drying of sawn timber in piles by pre-laying the pipes between the sawn timber, it equipped with additional heat pipes, the evaporation zones of which are brought out of the chamber, and the condensing Zones are connected to the evaporation zones of heat pipes that are in contact with the material , by means of couplings, also made in the form of a system of heat pipes. 11 12 5 1 12 V ig / Fig.Z S Have at 12U3) + // WITH / ciiii z.,; gi -} chJ five FIG /four 6-B 12PZ) ig.5