SU1245431A1 - Apparatus for drying and impregnating wood - Google Patents

Description

one

The invention relates to the woodworking industry and can be used for drying and impregnating wood.

The purpose of the invention is to intensify the drying process and reduce harmful emissions into the atmosphere.

FIG. 1 is a diagram of a device for drying and impregnating wood; FIG. 2 - centrifugal pump, longitudinal section.

The DNP Dryer and Propagation Device

The wood contains an impregnating 1 and a maneuverable 2 autoclaves, an impregnating liquid circulation system 3 having a centrifugal pump 4 with a shaft 5, a pressure 6 and suction pipe 7, a condensation system 8 and a vacuum pump 9, the shaft 5 of the centrifugal pump 4 on the suction pipe 7 side equipped with a screw 10, the discharge pipe 6 of the centrifugal pump 4 is connected via a heat exchanger 11 to the feed autoclave 1, and the condensation system 8 is equipped with a vacuum collector 12 installed in front of the vacuum pump 9

In addition, the condensation system 8 has a surface condenser 13 and a condensate collector 14, and the upper part of the maneuverable 2 and impregnation 1 autoclaves are connected by a foam line 15.

The device works as follows.

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E. the impregnation autoclave 1 loads the raw wood and is supplied from the shunting autoclave 2 the pre-heated impregnating fluid. The centrifugal pump 4 of the circulation system 3 is turned on and the autoclaves are connected to the condensation system 8, which contains a vacuum collector 12, in which the vacuum pump 9 creates the maximum possible vacuum.

In the impregnation autoclave 1, the longitudinal circulation of the liquid is carried out under vacuum conditions and, at the same time, it is heated in the heat exchanger 11. Moisture vapors from heated wood are bubbled through a layer of liquid, which results in the formation of foam, which is fed from the impregnation autoclave 1 through the foam pipe 15 to a maneuverable autoclave 2, where it is destroyed. The impregnating fluid from the foam is returned to the impregnating autoclave 1, and the released vapors of moisture, light fractions of the liquid, naphthalene and its derivatives enter the surface condenser 13, and then the vapor and light fractions of the liquid in the form of condensate are collected in collector 14, the non-condensed vapors naphthalene and its derivatives are precipitated in a vacuum collector 12.

After drying, the impregnation of wood is produced in 1t in an impregnating autoclave 1 by known methods.

The use of the invention will allow to intensify the drying process and reduce harmful emissions into the atmosphere (e.g. naphthalene vapor).

1рн $ .г

VNIIPI Order 3947/9 Circulation 501 Subscription

Random polygons pr-tie, Uzhgorod, st. Project, 4

Claims (1)

DEVICE FOR DRYING AND IMPREGNATING WOOD, containing impregnating and maneuverable autoclaves, a system for circulating impregnating liquids, a centrifugal pump with a shaft, pressure and suction pipelines, a condensation system and a vacuum pump, characterized in that, in order to intensify the drying process and reduce harmful emissions into the atmosphere, the shaft of the centrifugal pump on the suction pipe side is equipped with a screw, the pressure pipe is connected via a heat exchanger to the impregnation autoclave, and the sleep condensation system wife vacuum collection set prior to the vacuum pump. β $ ABOUT