The biogas enters the bottom of the tower and passes through the filling layer from bottom to top. Accurately add air through variable frequency control. The exhaust gas composition analyzer monitors the oxygen concentration at the biogas outlet and works together with the blower.
The size of the air supply is precisely controlled by the flow signal of the entering biogas gas, so that the percentage of oxygen in the mixed gas is controlled within a certain range, ensuring that safety accidents will not be caused by design or supply defects. At the same time, the safety setting of the air system introduces air into the tank body. If the air volume is insufficient, the desulfurization effect will quickly decrease. According to the load of the desulfurization system, the speed of the fan is adjusted through a frequency converter. Install an oxygen sensor at the back of the desulfurization system as a safety guarantee for controlling air intake. During normal operation, the remaining oxygen content in the outlet gas is 1.5-2.0%. If the oxygen content in biogas exceeds 1.75%, the fan speed will decrease. If it reaches 2.5%, the fan will stop. This value can be set.
循環(huán)泵設置備用泵，一個故障時可快速切換到另一個使用。
The circulating pump is equipped with a backup pump, which can quickly switch to another for use in case of a malfunction.
The safety settings of the explosion-proof system and the internal design of biological desulfurization are both explosion-proof designs. In addition, an explosion-proof gas monitor is installed inside the biological desulfurization equipment room. If the methane level exceeds 25% of the minimum explosion limit (LEL), the gas monitor will automatically cut off the power supply and turn on the explosion-proof fan to prevent explosion risk.
To ensure the good activity of bacteria, heat exchangers and temperature monitors are used to regulate and control the system temperature. The pH meter is used to control the addition of nutrient solution. For example, if the pH value is lower than the set value, fresh nutrient solution and dilution water will be automatically added to the desulfurization tower. At the same time, the waste liquid is automatically discharged and the liquid level reaches equilibrium.
Regularly add nutrient solution through a metering pump (designed as one in use and one backup). The liquid level switch controls the overall liquid level balance.
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2023-06-10
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