JP3085578U - Drying room pressure control and condensate discharge device for wood drying equipment - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a method of suppressing color deterioration, surface and inner layer cracking of dried wood, and reducing heat loss in a high temperature drying wood drying apparatus. SOLUTION: The container 1 provided with a weir that can change the water surface height.
The outlet of the condensate drain pipe 3 is provided at a position below the water surface of the container 1, and the pressure in the drying chamber is adjusted to an arbitrary pressure by arbitrarily changing the distance between the water surface and the outlet. The above-mentioned problem is solved by adopting a structure that is always automatically extracted so as not to accumulate.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to the operation of a dryer in a device for drying wood. More specifically, the present invention controls the pressure fluctuation in the drying chamber generated during the drying operation to an arbitrary range, and also removes condensate. The present invention relates to a device that automatically discharges at any time.

[0002]

[Prior art]

 As is well known, in drying wood, drying is performed while adjusting the humidity and circulating air with a controlled temperature in the drying chamber. Then, air is supplied to and exhausted from the drying chamber. Due to this operation, the pressure in the drying chamber fluctuates, but this fluctuation is controlled by the balance between the self-weight of the damper and the internal pressure of the damper attached to the supply / exhaust pipe.

[0003] In addition, if water and sap discharged from wood during drying are also gases, they are discharged from supply / exhaust pipes. Condensed liquid is periodically discharged from drain pipes provided on the floor of the drying chamber. Is discharged at

In recent years, steam-type high-temperature drying apparatuses with a drying temperature of 120 ° C. to 130 ° C. have been frequently used, mainly for drying cedar pillars, in order to reduce the drying cost and the drying time. Therefore, the pressure fluctuation factor inside the drying chamber increases, and condensed water also increases.

[0005]

[Problems to be solved by the invention]

 A device installed in the supply / exhaust pipe that controls the pressure in the drying chamber based on the balance between the weight of the damper and the internal pressure cannot control the drying chamber pressure freely at any pressure. Large amounts of water vapor and high-temperature air are discharged outside the room during heating, and heat loss increases. In addition, when the set pressure is high, a large pressure is applied to the structural members of the drying chamber, which causes deformation of the drying chamber.

[0006] In high-temperature drying, a large amount of condensed water is generated during steaming, and in the subsequent drying process, water evaporates and sap flows out of the wood at a high speed, and condensate increases. Emissions are required. Therefore, it takes time and effort manually to save labor. In addition, when the frequency of discharge is reduced, the color of the wood surface deteriorates due to the influence of condensed liquid components such as tannin from the wood.

The present invention overcomes the above-mentioned drawbacks and provides a device having a relatively simple structure for easily setting and controlling the drying chamber pressure to an arbitrary pressure and continuously discharging the condensate to the outside of the room. It is assumed that.

[0008]

[Means for Solving the Problems]

 To achieve this purpose, the device of the present invention created a weir that can freely set the position of the water surface on the side wall of a container that can store water, and attached it to the height of this weir and the floor of the drying room. It has a structure in which the internal pressure of the drying chamber is adjusted at the water depth between the outlet of the condensate drain pipe and the inside of the container, and the condensate can be continuously discharged into the container.

[0009]

[Embodiment of the invention]

 An embodiment of the invention will be described with reference to the drawings. In FIG. 1, a weir 2 capable of freely changing the water level in a container is provided on the side wall of a container 1 containing water, and the outlet of a condensate drain pipe 3 installed on the floor of a drying chamber 9 is inserted below the surface of the container. And a device for controlling the pressure in the drying chamber by the distance H between the outlet of the discharge pipe and the water surface. The condensate is automatically discharged into the container at any time through the condensate drain pipe, and flows out of the weir of the container into the drain. The drain pipe is installed below the floor of the drying room so that condensate does not accumulate in the drying room. More specifically, a valve 7 is attached to the condensate drain pipe so that opening and closing when changing the height of the weir and pressure can be adjusted to a pressure higher than the weir height if necessary. Also, since the fluid discharged from the drain pipe is a high-temperature gas-liquid, not only is the water in the container heated and evaporated, but also the discharged gas causes bubbling and water is scattered along with bubbles. , The water level in the container decreases. To prevent this, a water supply line 6 equipped with a flow control valve 8 is attached so that an arbitrary amount of water can be supplied at all times. Further, the container is covered with a lid 5 provided with an air vent line 4 in order to minimize a drop in water level due to splash prevention and to prevent burns due to adhesion of high-temperature splash water.

In FIG. 2, a partition 10 is provided in a container 1 containing water, and the container is divided into two chambers. The partition has a hole or space at the bottom that connects the two rooms, and the upper part is higher than the water surface, so that a large amount of water does not flow into the next room even if the gas is discharged by bubbling due to bubbling. A weir 2 for adjusting the water level and an outlet for the condensate drainage pipe are provided in one side of the room, and an air vent pipe is attached to the upper lid. The other side is an example of an apparatus having a structure in which a water supply valve 11 that automatically opens and closes according to a water level, such as a ball tap, is provided to suppress water loss due to water supply.

[0011] This device can also be manufactured using pits in drainage gutters usually attached to wood drying equipment.

[0012]

[Effect of the invention]

 Since the present invention is configured as described above, the following effects can be obtained.

[0013] Since the condensed liquid is constantly removed from the drying chamber by installing the apparatus, it is possible to minimize the color deterioration of the drying material caused by the resin or the like.

[0014] Since the drying chamber can be easily and safely controlled to an arbitrary pressure, heat outside of the heating and humidification can be suppressed, the cost required for drying can be reduced, and cracks on the wood surface and the inner layer can be suppressed. Connect.

[0015] With this apparatus, the drying chamber can be pressurized and depressurized within an arbitrary pressure range, so that the drying time can be reduced by promoting the discharge of moisture, resin, and the like from wood.

According to the second aspect of the present invention, the water level in the container is prevented from lowering to a minimum, and the amount of supplied water is reduced.

According to the third aspect of the present invention, the water required for maintaining the water level in the container does not run off, and the cost required for drying can be reduced.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating an example of a state in which a drying room pressure control and a condensate discharge device according to the present invention are attached.

FIG. 2 is a diagram illustrating an example in which an automatic water supply valve is attached to a drying chamber pressure control and condensate discharge device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Container 2 Variable weir 3 Condensate discharge pipe 4 Air vent pipe 5 Top lid 6 Water supply pipe 7 Valve 8 Water supply adjustment valve 9 Drying room 10 Partition wall 11 Ball tap type automatic water supply valve

Claims (3)

[Utility model registration claims] In a device for drying wood, heating and humidification are performed in order to obtain a temperature and a humidity required for drying. A pressure change in the drying chamber due to the heating and humidification is controlled to an arbitrary value. In order to automatically discharge the condensate of water and sap from steam and drying materials to the outside of the room, the drain pipe provided on the floor of the drying room is installed in a pit provided in the outdoor drain or a container with a similar function. A device that guides and sets the outlet of the drain pipe below the water surface of the container, and can freely control the pressure by arbitrarily changing the water level from the outlet of the drain pipe to the water surface, and automatically discharges the condensate at any time. 2. In claim 1, the hot gas in the drying chamber is discharged from the container through the drain pipe. At this time, the water in the container is entrained by air bubbles and jumps out of the container. A device that covers the upper part of the container with a lid that has an air vent for the purpose of minimizing scattering and safety from burns, etc., and is equipped with a water supply system to compensate for the drop in water level due to evaporation of the heated water. 3. A container according to claim 2, wherein a hole is formed in the container so that the lower portions communicate with each other so that water can be supplied so as to correspond to the lowering of the liquid level.
A device equipped with a water supply pipe on the other side and an automatic valve such as a ball tap that can supply water as needed to maintain the water surface level.