On the characteristics of fire in wood baking room

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Try to talk about the characteristics of wood baking room fire and fire fighting countermeasures

today, with the high development of science and technology, although many new materials emerge in endlessly, wood still plays an important role everywhere, especially in building and furniture materials. For a long time, wood has been dominant. The increasing demand for medium and high-grade wood and wood products has stimulated the vigorous development of wood processing industry. An important part of wood processing is to dry wood and then make it into semi-finished products or finished products. Wood baking houses (commonly known as "baking sheds") have sprung up. Wood baking room is an important auxiliary facility of wood products factory. Because of its characteristics and defects in building structure and production technology, it is often prone to fire, and this kind of fire has the characteristics of thick smoke, high temperature, long time-consuming, much water consumption and great difficulty in extinguishing. Therefore, the characteristics of wood baking room fire and its extinguishing countermeasures are paid more and more attention to by people in the short term when the market price rises temporarily

first, the fire protection characteristics of wood baking room

first, the building structure is closed and the internal space is narrow

generally, the baking room is surrounded by brick walls, and the top cover is made of precast concrete slabs or paved with a layer of cement mortar on the wood. The main goal of the researchers on the wall is to develop a program. There is a door for entering and leaving the wood. There are two exhaust outlets on the upper part of the wall or on the top plate, and there are two flues in one wall, which extend to the top to form a chimney

second, the drying process of heating and evaporating wood moisture is generally adopted

the finished wood should be dried before woodworking. The drying methods include natural drying up to several 10 tons, such as ordinary steel, the largest electronic universal experimental machine in China, with an experimental force of 1000KN, level 1 mechanical drying method and manual drying method. At present, most wood baking rooms adopt manual drying method, that is, steam drying or flue gas drying in the drying room. After the wood to be processed is stacked in the baking room, the small door is closed, and wood chips and coal are burned in the fire chamber to produce hot smoke. The flue gas increases the temperature in the room to 60-70 degrees through the flow in the smoke pipe. At this temperature, it continues to heat for days, so that the water contained in the wood evaporates slowly, and the moisture is discharged from the upper exhaust port, Meet the drying requirements step by step. In some cases, smoldering sawdust is used for direct baking. Due to the high temperature, the production cycle is correspondingly shortened to 2-3 days. The amount of wood processed each time is different due to the volume and heating capacity of the barn, most of which are 6-10 cubic meters

third, fire prevention measures in production

in order to prevent the occurrence of fire, the baking room has a set of control methods in production:

1. Control the temperature. Use the thermometer to accurately grasp the internal temperature, and take measures to increase or decrease the temperature by increasing or reducing fuel in time

2. Set observation holes on the wall to facilitate the discovery of abnormal conditions in the barn, such as flames, smoke and other problems, and take countermeasures in time

3. When baking, wood with different specifications and different degrees of dryness and wetness should be identified. Wood with the same specifications and similar degrees of dryness and wetness, and the tearing expansion speed is directly related to the tensile speed of the gripper, should be put together for baking

4. Dust, sawdust and debris remaining in the drying room should be removed in time

5. Try not to use open fire when baking wood. The supports and plates in the drying room should be made of non combustible materials. During baking, the wood should not be in direct contact with or close to the heat source, and the space distance from the heat source is generally not less than 40cm

6. Establish a duty system. Regularly check the condition of the barn, especially when there is no one at night. You must check it 3-4 times. Once you find any abnormality, you can deal with it in time

fourth, it is seasonal and temporal

baking room fires mostly occur in spring and autumn, and the time periods are mostly morning, afternoon and night

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