On the one hand, the establishment of biogas energy can supplement the energy demand of rural consumption and life; On the other hand, it can reduce the harm of organic wastewater and domestic waste to the environment in industrial consumption. The biogas in the biogas digester can be used for household energy consumption, consumption and processing of agricultural and sideline products, as well as biogas power generation, biogas fuel cell, etc. Biogas slurry is used to consume fertilizer, feed, biological pesticides and culture medium. Biogas residue is used for fertilizer and feed consumption. The multi-level application of energy and the circular application of materials in biogas engineering have established an ecological economic system linked by biogas, completed the win-win of environment and economy, and promoted the sustainable development of circular economy.
When the biogas pressure does not meet the user's requirements, a special biogas booster shall be set in the biogas desulfurization system. The selection of supercharger shall comply with the following rules:.
1. The flow of the booster shall be determined according to the hourly gas consumption of the user, and the pressure shall be determined according to the sum of the pressure required by the user and the resistance between the booster outlet and the user;
2. The number of parallel working platforms of step-up unit shall not exceed 3, one of which shall be standby.
The supercharger in the biogas desulfurization system shall be installed in a separate supercharger room, and the layout of the supercharger shall comply with the following rules:
1. The channel width between superchargers and between supercharger and wall shall be determined according to supercharger model, operation and maintenance requirements and other factors;
2. A buffer device shall be set before boosting, and the residence time of biogas in the buffer device shall not be less than 3S; The buffer device shall be equipped with stop valve and upper and lower limit alarm device; When the biogas reserve is at the lower limit, it shall be able to close the automatic shut-off valve interlock through the pressurizing equipment;
3. Check valve shall be set on the outlet pipe of each supercharger; A return pipe shall be set between the outlet main pipe and the inlet main pipe of the booster unit; Flame arrester shall be set for the main outlet pipeline;
4. The emergency stop button on site shall be set before the booster unit.
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