In recent years, more and more vegetable growers have built biogas digesters, and the use effect is also very good: not only a lot of straw and rubbish problems are solved, but also organic fertilizers are added, the cost is reduced, and the quality of vegetables is improved. However, during the interview, the reporter discovered that there were few vegetable growers who knew how to conserve the methane tank. Although the methane tank was constructed at the beginning of the construction period, the construction unit promised to use more than 30 years, but if the vegetable farmer does not pay attention to the maintenance on weekdays, the life of the methane tank is Will be greatly reduced. Recently, the reporter interviewed Master Jinliang, a professional technician who built the digester, and asked him to talk to you about the daily maintenance of the digester.
I. Maintenance of biogas digesters in summer
First of all, prevent empty pools and do a good job of protecting the pool walls. The currently constructed biogas digesters are generally cast in concrete, and cement is a kind of porous building material. If the biogas digester is exposed to high-temperature and dry conditions in the summer empty pool, it is easy to open the cement capillary pores and destroy the structure of the pool walls. Therefore, in summer, the biogas digester must eliminate empty pools. Even if the vegetable growers stop in the summer and the digesters are deactivated, they must be filled with water in the digesters to protect the walls.
Second, the inlet and outlet can not be filled with rain. In summer, there is more rainwater, and it is necessary to make rainwater in and out of the material inlets. Most of the digesters in Shouguang and other places are built outside the shed, and the inlet and outlet openings are not very tight. Once the rainwater entering the pool is too much, It will slow the rate of biogas production and affect the normal use of biogas digesters. In addition, summer temperatures are high, the fermentation speed is fast, and the amount of biogas produced is large. Pay attention to the pressure gauge and exhaust it in time.
Second, the maintenance before the autumn refueling
Before the refueling in the autumn of the digester, if the digester is used for many years, the tank body must be overhauled. If the sealing coating of the brush on the tank falls off, a layer of sealant coating must be applied to improve the sealing performance. To prevent biogas slurry from corroding the walls of the tank. Operation must pay attention to open the movable cover, pull out the air pipe, so that the feed inlet, discharge port, air duct vent, or use a blower to blow the air in the pool, replace the pool of air. The operator can test with small animals or lighted candles before going down the pool to ensure safety before going down the pool for maintenance. The staff under the pool should be tied with safety ropes and special care should be provided outside the pool.
At the time of refueling, at least 70%-80% of the original biogas slurry should be replaced, and a small amount be used as a strain, and then feed it again. Need to completely replace the new material of the biogas digester, the best choice for the use of purified cow dung as a starter species, the need to pay attention when feeding, should not be planted old manzi directly into the biogas digester, such as cucumber, eggplant, etc., easy to ferment Thoroughly plugging in the discharge port affects the use of the digester. In addition, old stalks of spicy vegetables such as green onions, garlic, leeks, etc. cannot be put into biogas digesters.
In addition to the daily maintenance of the pool, the supporting facilities of the digester also need regular maintenance. Gas pipelines and joints should be regularly overhauled to prevent air leakage. Soap water can be used to inspect the gas pipelines and the interfaces. The desulfurization agent should be regenerated regularly. The specific method is to pour the desulfurizer into the desulfurizer. Put it in a cool and ventilated place for 2-4 days. Wait until the color of the desulfurizer turns brown. You can continue to use it. Do not directly introduce air into the controller to desulfurize and regenerate. Prevent the desulfurizer from reacting with air to produce high temperature and burn out. Desulfurizer; The dehydrator installed at the outlet of the biogas tank should be inspected once every 1-3 months. The water in the dehydrator should be accumulated. The water should be poured out so as not to block the pipeline, causing the biogas stove to fail to catch fire. If the pipe is filled with water, use a pump to blow the water out.
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