Safe use of rural biogas
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First, build shallow pool security
1. To build a biogas tank, wear a safety helmet. At the construction of the pool construction site, workers under the pool are required to bring safety helmets to prevent the earthwork, arch collapse and falling bricks from injuring people.
2. Build a shallow digester from the ground. Minimize the amount of down-pool operations and control the depth of the digester to about 2.8 meters. In this way, the sediment in the removal tank can be carried out outside the tank. In case of danger when entering the tank, it is also convenient for rescue.
3, biogas fermentation to keep away from the open flame. The biogas digester should discharge the miscellaneous gas at the initial stage of the gas production. Do not use the gas pressure in the pool cover air pipe to prevent explosion.
4, to prevent landslides. When large-scale excavation pits are used, proper grading should be carried out according to the soil conditions. Reinforced soil pits should be reinforced by measures such as bracing. Do not construct pool materials by stacking earthwork or brick sand along the pit; drainage must be taken during rainy season construction. Measures.
5, the entrance and exit must configure the cover. After the normal use of biogas, cover the inlet and outlet openings to prevent people, livestock and poultry from falling into the pool. The feeding port can be covered with a cover net, which not only prevents the piglet from falling in, but also does not affect the feeding. It is generally required to determine how much material to feed in order to maintain the cell pressure balance.
6, other precautions. If the biogas digester is built in a large livestock and poultry ring and the earth pit is excavated, the tiles on the house shall be dismantled, and the walls and columns shall be supported and reinforced; it shall be forbidden to use explosives to plunge the stones in the pit during digging; and it is forbidden to use coke and coal. Firewood ignites the baking pool wall to prevent oxygen deficiency or gas poisoning. When using steel molds or soil molds, it is necessary to ensure that the brackets are firm and special care must be taken when disassembling the racks.
Second, into the pool to prevent poisoning
1. Pay attention to the air circulation when refueling or maintaining the digester. Before entering the pool, the pool of biogas must be pumped away so that the liquid level rises to the bottom of the pool. Below the outlet, sufficient ventilation is provided to release the biogas. First, put small animals such as chickens, ducks, rabbits or cats into the test. Observe for 15-30 minutes. If the animals are normal, prove that there is no danger, and then go to the pool. During operation, people should not stay in the pool for a long time. It is forbidden to use open fire and smoking in the pool.
2. When you go to work in the pool, you need to be guarded on the pool. Persons who work in the lower pool should wear a safety belt. In case of danger, the guards on the pool can immediately rescue them. Special attention should be paid to the fact that when someone is found to have been poisoned, they must not rush to rescue the pool. First, use a blower and other methods to send air to the pool to allow the patient to inhale fresh air. Otherwise, it will cause many people to continue poisoning accidents. The poisoned patients being rescued should be sent to nearby hospitals for treatment as soon as possible.
Third, the use of fire prevention
1. The use of biogas must maintain a safe distance from combustibles. The gas stove or light should not be placed next to flammable products such as firewood, oil, cotton, and mosquito nets, nor should it be near the roof of the straw house to ensure safety.
2. Before and after using biogas, check whether the switch has been turned off. If the switch is not turned off before use, it cannot be fired. Because there may have been a lot of methane in the house at this time, an explosion or fire may occur on fire. At this time, the switch of the cooker should be turned off quickly to open the doors and windows to extinguish all the fire sources in the room and prevent explosion of the biogas.
3. Educate your children not to play with fires near biogas plants and biogas equipment (lamps, stoves, switches, pipes, etc.) because there may be leaks in these areas.
4, adjust the throttle. In the ignition, it was found that the flame became red and soft, indicating that the air was insufficient; the flame was short or separated from the flame, indicating that the air was excessive, and the flame was stably ignited by adjusting the damper, indicating that the air intake was just right.
5. When the user uses biogas, always check whether the switches, valves, three links, joints, pressure gauges, pipes and movable covers are leaking. Leakage can be checked with soapy water, but also alkaline lead acetate test paper can be used to check, the method is: soak the test paper with water, placed on the site to be checked, if the leak, test paper and hydrogen sulfide in the biogas reaction will occur, so that the test paper Become black. If the smell of smelly eggs (hydrogen sulphide smell) is smelled when the switch is turned off, the place where the biogas equipment leaks can be confirmed, and the leakage is serious.
6, in the event of a burn accident, according to the degree of burns to deal with the injured. When a fire accident occurs, the mind must be calm, first of all turn off the gas source of biogas, and actively organize fire fighting. If there is a fire in the pool, it is necessary to splash water from top to bottom and rescue the personnel from the pool as soon as possible. If it is burned indoors, it should be rolled slowly or be used by others to splash water, etc. It is even more likely that it will not be able to run away and fuel the fire. After the fire is extinguished, the person who is being burned should quickly take off the clothes on fire, rinse the body with clean water, and wrap the wound or the whole body with clean clothes or sheets. During the cold season, keep warm and then send it to the hospital immediately.
In addition, the disposal of biogas digesters must also be promptly dealt with. Where biogas digesters have been identified as waste, landfills should be treated in a timely manner. If they are changed to reservoirs, they should have protective measures and be kept intact. Prevent people, livestock and poultry from accidentally falling into the pool and causing unnecessary injuries.