Non-road mobile machinery is machinery and transportable industrial equipment that operates in an off-road environment and relies on diesel engines to power it. They come in a wide variety of ways, including but not limited to loaders, excavators, bulldozers, road rollers, asphalt pavers, forklifts, pile drivers, forklifts, and rotary excavators. These machines must also meet the standard requirements of the "Exhaust Smoke Limits and Test Methods for Non-road Diesel Mobile Machinery" (GB36886-2018).
Non-road mobile sources, these little giants lurking in every corner of the city, release pollutants such as sulphur dioxide, hydrocarbons, nitrogen oxides and particulate matter, putting a lot of pressure on our environment. According to the China Mobile Source Environmental Management Annual Report (2021), exhaust pollution from non-road mobile machinery has become a major component of mobile source pollution.
According to statistics, the emissions of a non-road mobile machinery in the ** dynamic incentive plan in February are equivalent to 60 large trucks or more than 100 cars that meet the national IV standard. If we neglect to maintain these machines, their contribution to pollution will probably explode and become a major contributor to environmental problems. We must pay enough attention to the emission of non-road mobile sources and strengthen their detection and management, so as to effectively curb the environmental pressure caused by them and protect our common home.
The exhaust gas detection methods of non-road mobile machinery include the opaque smoke method and the Ringelmann smoke method.
1. The opaque smoke meter is used to continuously measure the light absorption coefficient of the exhaust of non-road mobile diesel machinery under working conditions, and the sampling frequency should not be less than 1 Hz, and the maximum reading value of the opaque smoke meter during the measurement process is taken as the measurement result. If the free acceleration method is used, the detection result is taken as the arithmetic mean of the maximum value of the last three free acceleration smoke measurements. The installation and use of the opaque smoke meter should meet the requirements of GB 3847.
2. Ringelmann smoke method non-road mobile diesel machinery Ringelmann smoke method continuously observed non-road mobile diesel machinery in 51. The exhaust smoke degree under the measured working condition is determined to be the exhaust smoke measurement result by the observed Ringelmann smoke degree. During the inspection process, the smoke test results can be obtained by means of **, camera or law enforcement recorder.