To address the controversial issue of implementing emission standards for biogas generator sets, we first need to clarify the working principle of biogas generator sets? Due to the social and economic benefits of biogas power generation projects, the use of biogas power generation units for grid connection generally adopts reciprocating gas internal combustion unit power generation technology with smaller single unit power. Through the combustion of biogas in the cylinder, the piston movement is driven to generate power, which then drives the generator to operate and generate electricity.

 

The gas internal combustion unit power generation technology has the following characteristics:

 

① Low investment per kilowatt for station construction, ranging from 2500 to 3500 yuan/kW; High investment return rate: 45%~80%; Low operating cost: 0.1-0.12 yuan/kWh.

 

② The supporting equipment of the gas internal combustion engine unit is simple, and the power station has strong mobility.

③ The single unit power range of the unit is 4kW~2000kW, which can operate as a single unit or connect multiple units to the grid, making station construction flexible.

④ The self consumption of the power station is low, not exceeding 2% of the power generation.

⑤ Gas internal combustion and the use of combined heat, power, and cooling can achieve a thermal efficiency of up to 80% for the unit.

⑥ Low requirements for biogas source conditions.

At present, the emission indicators for environmental impact assessment and environmental acceptance in various regions mainly include SO2 and NOx. The standards implemented in various regions mainly include the following:

① Emission Standard for Air Pollution from Boilers

② Emission Standards for Air Pollutants from Thermal Power Plants (GB 13223-

③ The second stage of GB 14762-2002 "Limits and Measurement Methods for Pollutant Emissions from Automotive Positive Ignition Engines and Vehicles Equipped with Positive Ignition Engines" and "Limits and Measurement Methods for Pollutant Emissions from Automotive Compression Ignition and Gas Fuel Positive Ignition Engines and Vehicles (China III, IV, V stages)

④ High power biogas generator set

⑤ Comprehensive Emission Standards for Air Pollutants (GB 16297-).

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