Biogas is a colorless, odorous, toxic gas, its main components are CH4 and CO2, in addition to CO, H2S, NH3, O2 and so on. The volume fraction of CH4 is usually 50% - 75%, the volume fraction of CO2 is 30% - 40%, and the sum of other gases is generally less than 2%.
The purified biogas enters the biogas compressor first, and the biogas pressure rises to 0.6MPa. After passing through the buffer tank, it enters the decarbonization unit and dehydration unit in sequence. The composition of biogas after decarbonization and dehydration is no longer different from that of conventional natural gas. Then the biogas enters the natural gas compressor, and the pressure is increased to 25.0mpa to become compressed natural gas. Then, the cylinder truck is filled with gas through the filling column. Compressed natural gas can be temporarily stored in the high-pressure gas cylinder group when the gas cylinder truck carries out the transportation task and there is no filling object in the filling column. When the gas cylinder truck returns to the factory, the gas cylinder truck shall be filled with the storage gas cylinder through the filling column. When the natural gas pressure in the gas cylinder group is reduced to 10-12mpa, the gas cylinder truck shall be filled with the compressor.
Decarbonization in process system refers to the removal of CO2 from biogas to improve the volume fraction of methane and the calorific value of biogas. After decarbonization, the volume fraction of methane in biogas can reach about 96%, and the low calorific value can reach 34.4mj/m3.
DEAR Air Separation Provincial air separation engineering technology research center: combination of production and research to promote transformation. Give full play to the advantages of resources; Improve the efficiency of project research; We will promote the upgrading of the industrial revolution.
DEAR air separation design and Research Institute: make great efforts to make breakthroughs. Employ high-end talents; Won a number of patents; Help customers grow. DEAR has invested a lot to build an intelligent production workshop to ensure that the product quality is close to zero defects, improve the accuracy of biogas purification equipment and shorten the scheduled cycle.
DEAR Air Separation Intelligent Manufacturing: energy saving and efficiency, benefit customers. Clearly grasp the production and marketing process; Improve the controllability of production; Reduce manual intervention. The company has a number of patented technologies, among which the ultra-low discharge pressure energy-saving patent belongs to the domestic leading level, which can reduce the energy consumption of biogas purification equipment by 5% - 15%, and save the operation cost.
DEAR Air Separation Remote equipment monitoring: efficient operation, create profits together. It can be monitored and forewarned; Accurately grasp the fault information; Remote diagnosis and rapid solution. The remote intelligent monitoring system independently developed by DEAR enables the whole process intelligent management of equipment field and remote monitoring terminal, early detection and early warning of faults, and saves the labor cost of field operators.
