Pollution of diesel power generation: The integrated installation of a power plant area is designed with a top ventilation structure. The windows for natural lighting are fixed with double-glazed windows. The engine block is set to be 1.0-1.5m above the ground. The concrete seat is designed to reduce the noise pollution on the outside of the plant and facilitate the operation and inspection of the unit in the future. The noise monitoring outside the plant can be kept below 60~65dB. If trees are planted outside the plant and a fence is added to the site, the noise pollution is extremely mild. The height of the chimney stack is preferably 30-35m, which ensures that the flue gas spreads out and avoids excessive concentration of nearby exhaust gas. The top of the chimney should be equipped with a dust collecting cover to avoid environmental pollution caused by ash and carbon particles in the exhaust.
Cooling water working mode and unit operating mode selection: The working mode of cooling water of the unit has two types: open cycle and closed cycle. The open cycle uses natural water source for direct cooling. It requires a natural water source that is easy to access near the unit. It has obvious power saving effect compared to closed cycle, but if the cooling water is directly discharged to the outside, the unit fuel or oil system may The leakage will lead to pollution of the surrounding environment. Although grease traps and degreasing facilities can be installed at the drain, the risk of contamination cannot be completely eliminated. The closed cycle does not require a natural water source, and the unit installation location is less restrictive. In this mode, the cooling tower is required to cool the circulating water, and the self-consumption of the unit is increased by about 3% to 4%, and the economy is poor. Its greatest advantage is the complete elimination of the risk of leakage of various systems and pollution of the surrounding water source soil.
The environmental protection measures set by the unit operation mode are mainly used to reduce NOx and SO2 pollution in the exhaust gas. The amount of NOx produced in the machine depends mainly on the temperature and oxygen concentration in the cylinder and the residence time of oxygen and nitrogen in the high temperature. In order to reduce NOx emissions, the fuel injection starting point can be postponed, and the high temperature combustion period can be shortened, thereby reducing the residence time of nitrogen in high temperature. According to the experimental statistics, the fuel injection advance angle is reduced by 1° crank angle, and NOx is correspondingly reduced by 3% to 7%, but such a It will cause adverse effects such as increased afterburning, increased fuel consumption, and increased production of unburned hydrocarbons (HC). For every 20% to 30% reduction in NOx production, the fuel consumption rate is increased by 1% to 3%, which is the biggest constraint in the implementation of this measure. The reduction of NOx emissions can also be carried out by catalytic reduction of ammonia denitrification, but the equipment is large, the investment is large, and the operating cost is high. In order to reduce SO2 emissions, the lime-gypsum method can be used, but there are also disadvantages of large volume of the device and high investment amount, and because of the large amount of gypsum generated, it is difficult to handle and easily cause secondary pollution.
Automotive Scr System Assembly
This SCR system adopts mutilayer Nylon Tube made of ETFE/PA12. These tubes hace excellent performance of corrosion resistance and low Urea solution permeation. They meet the requirements of SAE J844. SCR system is made up of supplying tubes, returning tubes and injection tubes.
Because of the flexibility of the pipeline, the pipeline is often used in hydraulic systems and other mechanical devices driven by liquid. Because of the various parts of the car generally dispersed installed in various parts of the car, the car line like blood vessels in the body, responsible for linking these dispersed components, so that the complete system of automobile work orderly.
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