Wednesday, December 29, 2010

【 Weak current College 】 paper production enterprise of fire safety management-Power By 【 China power house network 】


Paper production enterprise is to plant (timber, Reed, straw, wheat straw, bamboo, linen, cotton fiber, bagasse, asparagus grass, etc.) as raw materials, production of paper and paperboard. At present, China has various types of paper mill more than 7000, production of paper up to more than 400 species. Paper in industry, agriculture, light industry, information industry and other fields have been widely used.
  
First, the paper manufacturers of fire risk

(A) fuel, and raw materials with flammability, spontaneous
Paper is the use of mechanical or chemical methods will plant cellulose, hemicellulose separated, clear the lignin, useless constituents through various processing, made into pulp, of paper on copy made into paper process.
  
The main use of vegetal paper and chemical raw materials, such materials are combustible and spontaneous.
  
Vegetal mainly wood, straw, wheat straw, Reed, bamboo, linen, straw, bagasse, asparagus, etc of cotton fibre, the lower their lighted a fire after the burning, high calorific value, easy to spread, and easy to fly formation.
  
Paper production enterprises often need to store paper raw material, such as improper storage management measures, is extremely easy to form a fire. For example: foreshores straw, etc. in the stack have not been completely dry, especially new cut straw, moisture content is high, if improper, poorly ventilated dumps, easily fermenting to produce large amounts of heat. Because of the heat transfer resistance of rice straw was bad, it gradually generated heat energy savings, the temperature continued to rise, rising to 60 ° c a 70 ℃, microbial death, wet straw of oxidation of the acceleration, continue to heat up, to be increased to 200 ° c and above, that is, to the fire burning.
  
In addition to straw, wheat straw, jute, flax, cotton, stained with the oil of rags, sugar-cane bagasse, etc., all have heating nature of spontaneous combustion. This class of substances of spontaneous combustion, and stacking height, moisture content, temperature, etc., are closely related. Usually straw dangerous temperature is 70 ° c, humidity 20 percent risks, charring is 204 ° c.
  
In the production process, the raw materials required shredding, chopped wood, grass, Reed tablets and during processing of bark, sawdust, sawdust, Reed, straw ash, slag, etc., the surface area of steaming, easy-to-burn.
  
Chemical raw materials is a secondary raw material for paper, used in pulp and paper making rrecovery, have a considerable amount of time. These chemicals, some of the risk inherent to spontaneous combustion, such as used in the preparation of sulphite cooking liquid, vulcanization of cooking vegetal iron, sulfur, improper storage and transportation, will lead to spontaneous combustion; itself has a combustion and explosion risk, such as ammonia, sulfide, Rosin, and so on; there is no combustion and explosion risk itself, but as improper storage and transportation, or contact with water or damp, and acid and other organic materials in contact with other items that can cause burns or explosion, such as lime, bleaching powder, hydrogen peroxide, etc.
  
(Ii) power supplies, fire mismanagement
Electric lighting circuits and equipment installation, improper use, resulting in the touch line, short circuit, welding, cutting and hair with a torch at the moment, did not take fire prevention measures; use alcohol, gasoline, and other flammable or explosive solvents cleaning equipment; in the reactor material field, workplace smoking, throw cigarette butts, etc. may cause a fire.
  
(Iii) production processes in a fire hazard
Papermaking processes: preparation, cooking and other paper-making process.
  
1. feed preparation process of fire hazards
① preparation workshop, there is a wide range of dust when suspended in the air of dust and air mixture reaches a certain concentration, it encountered the fire source, have the potential to cause combustion and explosion.
  
② in the raw material in a small stones, metal objects, the following raw materials entering the chipper or cutting grass, and blade friction, impact, will beat out Sparks, dust ignition sawdust grass.
  
③ sawdust, straw dust accumulation of flammable dust and so on each kind of mechanical device bearing or lighting, often running longer, friction heat or light bulbs and baking of fire.
  
④ dedusting system blower, due to wear and eccentric, causing friction with the chassis of the impeller, the fire ignited combustible dust.
  
2. the cooking process of fire hazards
Cooking, washing, screening, such as cleaning, bleach, pulping processes are in the water and damp conditions, fire risk. But the bleaching agent to be used in the preparation of chlorine and other toxic gases, fire explosion-prone and, therefore, it is necessary to pay attention to fire prevention flameproof.
  
3. paper processes of fire hazards
Paper pulp, seasoning process basic is water wet situations, usually no fire hazard. But the paper on the machine you want to use lubricating oil, lubricating oil with flammability, you should be aware of its use and safekeeping.
  
The paper also be collated, selection, inspection, packaging, etc, can be shipped, in these processes in the paper and paper etc with flammability, and thus it is necessary to pay attention to fire prevention.
  
Second, paper manufacturers of fire safety measures

(A). the raw material yard fire safety measures
① raw material yard General settings on the edge of the town, and should be in the enterprise and residential areas as the minimum frequency of the winds in the upper hand side, fire engine to reach places. Sites should be flat and no water, heap-based higher natural ground around 30 cm. Material yard and other buildings, railways, roads etc. should have the fire separation.
  
② prevent material stacking of spontaneous combustion. Raw materials must be checked before approaching, strictly control the moisture and humidity, rice straw, wheat straw, a Reed's water content should not be greater than 20 per cent; bagasse moisture should not be greater than 50%, exceeding the above standards are not allowed on the stack; the first used in the production of, or dried and then stacking.
  
Stacking should become the long Spire-axis should be conducted and the local dominant winds all year round. Central in the haystacks, wind allow one or two layers for thermal ventilation duct, periodically check the stack temperature. When the temperature rose to 40-50 degrees centigrade--should focus on monitoring. Spire on straw stack, as well as dented stacking on pallets have half a year or so of stacking, to pay particular attention to the temperature, the temperature was found
  
Up to 60 ° c to 70 ° c, one must be stacked cooling to prevent spontaneous combustion.
  
③ strictly electrical management. Stacking cable should be used, directly — distribution; should not be mounted above the stacking lighting lines, lighting rod (the use of cement-bar) and stacking recent horizontal distance shall be not less than light pole height 1.5 times; high voltage line allowed through the yard area; farm machinery of power distribution cables should be used in insulation, cable; pesistent is strictly forbidden, temporary exhibition, the production line must be used, shall be subject to safety, fire departments, and to take appropriate security measures, which shall be immediately removed after use; use lights inside the Tower, and selects the dust-proof lamps, searchlights, etc. with nursing home security lighting, and ballast taken heat insulation, heat fire prevention measures; do not use mobile lighting: farm power switches, outlets, etc, must be installed in a closed distribution box; the fire-fighting appliances should press L2 load power supply. Should use a separate power supply circuits and fires off production, domestic electricity when fire electricity cannot be guaranteed.
  
④ stacking binding wire must not be used to avoid suffering from lightning. Reactor site is strictly prohibited.
  
(Ii). the production process of fire safety measures
1. feed preparation process of fire prevention measures
① raw material before entering the cutting machine, you should clean the debris and equipment import and install electromagnetic alarm device, preventing iron sundry cut cutter.
  
② cut grass process should have a cyclone dust collector (room), prone to dust parts of grass, such as cutting grass grass blade export, conveyor, filtering machines Tablet population and export, all the Cabinet cover closed. Most of the dust separation and collected in order to avoid accumulation in machines, motor drive belts and bearings, due to friction heating and cause a fire. The class should be clean accumulated in broken grass and straw dust.
  
③ various electrical equipment and wiring installation, you must comply with the provisions of the statutes of electrical installation, electrical lighting equipment and switching must comply with the requirements of the dust-proof.
  
④ Workshop is strictly prohibited. If the repair equipment needs for welding, cutting jobs, must undergo a rigorous examination and approval, to stop production. Implementation of fire prevention measures, allowed to carry out the job.
  
2, the cooking process of fire safety measures
Bleaching agents used in the preparation of toxic gas chlorine, chlorine should be delivered by hand, pipeline equipment should be closed. Chlorine steel bottle should open, and to prevent exposure. Chlorine oxidation, there should be separate from the organic combustibles. In the vicinity of chlorine steel bottle should be built among a grey with slopes of hygiene, when chlorine steel bottle leak, unable to control, you can change it to push people pool as emergency and processing.
  
3, papermaking processes of fire safety measures
① timely clean production process of waste paper, paper, paper, paper scraps, and other combustible, paying particular attention to the machine under the trenches, housings, steam pipelines and other hot work surface clean.
  
② Workshop is strictly prohibited. Workshop within the need for welding, cutting and hair with a torch at the moment, shall be subject to approval, implementation of fire prevention leadership, and there are specialist care, it can be.
  
③ Disable petrol, alcohol, and other flammable or explosive solvents cleaning equipment.
  
④ do equipment repair and maintenance work. All kinds of bearings to fine space, maintain normal lubrication system to prevent oil leakage, it is best to install the hotbox alarm device, to prevent fire.
  
⑤ electrical equipment and wiring must comply with the relevant statutes, the switch must have the shield, fluorescent lights must be fixed by the shell.

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