Wood vacuum drying method and device
A vacuum drying device and vacuum drying technology, applied in the direction of drying solid materials, method combination to dry solid materials, drying, etc., can solve the problems of reducing air medium and affecting heat conduction effect
Inactive Publication Date: 2013-04-03
INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY
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Problems solved by technology
[0007] 2 At present, the general vacuum drying equipment at home and abroad usually uses radiation and convection heating to heat wood, and the heat conduction effect is affected by the reduction of air medium in the vacuum state.
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[0027] The inventive method comprises the steps:
[0028] Put the wood 3 to be dried in a flexible packaging bag 2, the packaging bag is equipped with a waterproof zipper, and after the wood is loaded, close the zipper;
[0029] After the wood to be dried is packed into a flexible packaging bag, it is placed in a water bath box 1 for heating. The water in the water bath box is input into the hot water boiler 14 through the hot water circulating pump 13, and returns to the water bath box after heating. After the temperature reaches the set value, the hot water circulating pump 13 stops working; when the temperature is lower than the set value, the circulating pump starts, and so on, so that the temperature of the water bath tank 1 is maintained at about the set value;
[0030] Open the vacuum pump 11 to make the vacuum pressure in the cylinder 7 reach the set value. Use hose 4 to connect the flexible packaging bag with the sub-air cylinder 7, and open the hose valve 5 to extr...
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The invention discloses a wood vacuum drying method and device, belonging to the technical field of wood vacuum drying in the wood drying industry. According to the invention, by adopting a wood flexible vacuum dryer technology, the traditional wood vacuum drying metal tank body is eliminated, and dry wood is placed in a flexible pipe with good airtightness and heat conduction property, two ends of the flexible pipe are sealed, connected with a vacuum pump, and then placed in a water bath. After vacuumizing is started, the outer wall of wood is in tight contact with the flexible pipe, heat is directly conducted to the inner part from the outer wall of the wood, and water in the wood is evaporated and then is longitudinally discharged along the wood. Compared with the traditional wood vacuum drying, the wood vacuum drying method has the remarkable effects of little equipment investment and high drying speed, capability of drying plate lumbers with general specifications, especial suitability for drying various special materials, good drying quality, high drying speed, capability of reducing seasoning degrade loss and saving drying cost, remarkable economic benefit and long social and ecological benefit.
Description
technical field [0001] The invention belongs to the technical field of wood vacuum drying in the wood drying industry, and relates to a fast heating and fast drying method and device for wood vacuum drying. Background technique [0002] Wood drying is an important part of wood processing. There are many ways to dry wood. Among them, the conventional drying of wood can meet the drying requirements of general-purpose boards and squares. The drying quality is good, the drying speed is fast, the drying equipment technology is qualified, and the drying process is mature. It occupies the leading position in my country's wood drying. However, in addition to general-purpose sawn timber, there are still a considerable amount of special timber that needs to be dried every year in my country. For example, due to the needs of the maintenance period of ancient buildings, large-diameter logs are quickly dried; precious timber such as mahogany slabs or blanks need to be dried; Special-shap...
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IPC IPC(8): F26B7/00F26B25/00
Inventor 高瑞清潘斌李晓玲王宵高利祥
Owner INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY