【 Weak current College 】 wood baking room fire and firefighting---Power By 【 China power house network 】

In science, technology, highly developed today, although many new materials abound, but wood is still everywhere to play an important role, particularly in the construction and furniture materials, reflecting more prominent, over a long period of time, wood has always occupies a dominant position. People on the high-grade wood, wood products demand increases, stimulated the development of the timber processing industry, wood processing is an important aspect is the wood drying, and then made into semi-finished products or finished products. Wood baking room (commonly known as "roast shed") also have significant emerging. Wood baking room is wood products plants important ancillary facilities, due to its architectural structure and the characteristics of the production process and defects, often vulnerable to fire, and fire have smoke concentration class, high temperature, fighting it costs time, water, difficult, therefore, the characteristics of wood baking room fires and firefighting more and be taken seriously.
　　
I. wood baking room fire characteristics
　　
One is building structure closed, small internal space.
　　
General baking room are completely surrounded by brick walls, the top cover with precast concrete panel or in wood covered with a layer of cement mortar. Their wall is only one door for access to the timber, the upper part of the wall or the roof two vent, one side wall there are two flue, chimney extends top form.
　　
The second is generally use heating evaporation moisture wood drying technology.
　　
Lumber in woodworking processing before after drying. Drying methods are natural drying and artificial drying. Currently most wood baking room is the use of artificial drying method, i.e. drying chamber with steam drying or drying with flue gas, subject to the processing of wood piled in baking room, turn off the little doors, the fire Chamber combustion of wood, coal produces heat and smoke, smoke by the flow of flue tube indoor temperature rise to 60-70 degrees, the temperature continued heating 3-5 days, make wood containing water slowly evaporate, moisture from the top of the exhaust emission requirements, work your way up drying. Individual use of smoldering wood chips directly baking because temperature is high, the production cycle corresponding to 2-3 days. Each baking processing of timber quantities due to the volume of the barn and heating capacity but differentiated, mostly 6-10 cubic meters.
　　
The third is the production of fire prevention measures.
　　
To prevent fire, baking room in production with a set of control measures:
　　
1, control the temperature. Use the internal temperature thermometer accurate, timely increase, decrease fuel methods raise or lower the temperature.
　　
2, set on the wall, easy to find on hole barn in unusual circumstances, such as flames, smoke, take countermeasures in a timely manner.
　　
3, baking, different sizes, different levels of wet and dry lumber should be recognized, the specifications are the same, wet and dry wood degree almost put together for baking.
　　
4. to promptly clear remnants in drying house dust, sawdust and chips.
　　
5. baking wood to no open flame, oven-stand and Board to use non-burning material, baking time wood do not come into direct contact with or proximity to sources of heat, and the heat source space distance not less than 40cm in General.
　　
6, make on-duty system. Scheduled check barn, especially at night when nobody must check for 3-4 times, once found exception can be processed in a timely manner.
　　
Fourth, with seasonal and time.
　　
Baking room fires occurred in spring and autumn, the time periods for morning, afternoon and evening.
　　
Second, there is a wood oven baked for fire hazard
　　
First wood baking room fire characteristics: large, high-temperature flame, smoke, spreading fast second wood in baking will produce large amounts of combustible gases. When wood is only starting out moisture evaporation, along with the increase in temperature, when the temperature of 100 ° c, the wood has a slightly dry state, continue further rise in temperature, when the temperature reaches 250 ℃-300 ° c, the wood will volatilize out large amounts of combustible gases such as methane, hydrogen, carbon monoxide and wood tar, etc. If baking time control, along with the baking time of growth, combustible gas concentrations will rise to reach a certain level be spontaneous and ignite wood fire.
　　
The third is the decomposition of wood at high temperatures also emits large amounts of heat, easy to reach the smouldering wood, wood fire. In high temperature baking, wood not only release large amounts of combustible gases and will release a lot of heat. This heat is not oxidation combustion of wood, but from wood itself when the exothermic decomposition, which will make the temperature inside the drying chamber for increased more rapidly and soon reach the wood fire, baking time and temperature once the control will fire.
　　
The fourth is the slow fire burning, the size of the area concerned with burning time. Since the Barn building structure closed, the flame will soon run out of internal and external air oxygen into the channel, it is difficult to create an air convection, plus combustion smoke on fire has inhibitory effects, baking room internal fire development is slow, the spread of a long time. Therefore, depending on the length of combustion, but also easy to judge the size of the area of internal fire: the time is short, the fire in the middle and the outer surface of the wood stack; a long time, it may all be lit. With this in mind, we decided to put in has the reference value.
　　
Fifth, the smoke concentration, temperature is high, and the fire flashover phenomenon. Incomplete combustion products of aggregation, the internal temperature rise to burning barn in a stable state of danger. Once the doors open, the large influx of air, in a very short time, the outbreak of violent, comprehensive burning — flashover, fire behavior, fire-fighting personnel to have great risk.
　　
III. fighting strategies and considerations
　　
First, do a fire detection and internal combustion. Through the company owner and technical personnel to understand, or look to find out structural baking room, heating, burning time, with or without collapsing, there is no climb outside facilities, fire muzzle where, wall holes location, on the amount of smoke gas, the color, taste, etc. Integrated intelligence, judgment value and difficult fight, to be determined.
　　
The second is the organized forces of effective internal attack. First of all, water gunmen to put in place, shooting water fight fire with fire in the muzzle, good water supply power in the Organization at the same time, to determine water gunmen and breaking hands Division, mobilization of equipment. When you are ready, to timely evacuation of independent personnel. In general the entrance of the attack is the door opened the door to the attention of deflagration may occur, to ensure a safe distance, to be a flame spray out immediately in water, cover breaking hands apart block a section of fire-tube, the center of the brick wall with fire exposure out of (direct water because the wood block, the effect is not good). Then, to fire point shooting water, to promote within, if necessary, squatted down to grill the following a bottom-up water. After eradication of the open fire, may also be transferred to the roof of the House, down to the water to cool.
　　
Third, the Organization for the evacuation of wood. Due to the relatively large size of wood room, water is very hard to permeate into the Interior, where necessary, to timely organization personnel evacuation of timber.