Let's learn more about the operation and control of biological desulfurization system in biogas equipment system!
1. Biogas enters from the lower end of the spray reactor, leaves from the top after passing through the filler layer and enters the subsequent treatment stage. A flowmeter shall be set on the biogas pipeline to monitor the biogas flow in the pipeline at any time. In addition, a biogas composition analyzer shall be installed on the biogas pipeline to monitor the hydrogen sulfide content and methane content in the biogas after desulfurization.
2. The spray culture liquid is pumped out of the aeration reactor through the heat exchanger to the upper part of the spray reaction tower. While realizing the spray cycle, the culture liquid in the system is maintained at a certain temperature environment through the heat exchanger.
3. During commissioning and operation, determine a suitable temperature value first. If the temperature drops, start the pipeline pump at the hot water end of the heat exchanger to increase the temperature. When the temperature rises to the set value, stop the pipeline pump.
4. The fan adopts frequency conversion control. The oxygen content in the culture medium is measured by ORP (redox potentiometer) installed on the wall of the culture medium aeration reactor, and the air output of the fan is adjusted and controlled by the frequency converter to control the oxygen content in the culture medium within an appropriate range.
5. A sampling port is set on the wall of the medium aeration reactor to manually collect the pH value of the medium to judge whether alkali is needed in the medium and the amount of alkali. Generally speaking, when the end product is elemental sulfur, it is not necessary to add alkali to the culture medium. When the end product is dilute sulfuric acid, alkali needs to be added to the culture medium to maintain the neutral requirements of the culture medium.
6. The ideal mode of operation is to change part of the medium every day. The source of culture medium can be adjusted by filtration and dilution after biogas slurry, and the adjustment method must be determined by test. Due to different biogas slurry raw materials, the replacement amount also needs to be determined after field test. The general data is 1 / 20 to 1 / 30 of the replacement amount per day. The culture solution discharged from the system needs to be precipitated to take away the possible solid substances such as elemental sulfur from the system while discharging the excess culture solution. Different biogas liquid may be different. The specific requirements and quantity of nutrient liquid to be used shall be solved during commissioning.