According to a report released by Accenture, a world-renowned management consulting company, on January 29th, water resources played an important role in all stages of shale gas development. China has to take water resources as a crucial factor in the development of shale gas processes. Considerations. According to the report, shale gas development consumes a lot of water resources, and a large amount of waste water will be generated during the operation process. If it is handled improperly, it will cause environmental pollution. From the U.S. experience, the amount of water required for drilling and fracturing is generally around 5 million gallons (18.927 million liters), which is equivalent to 1000 trucks of water, and the fracturing stage can use up to 90 percent of the total water. %. Due to its high population density, scarce water resources, uneven distribution and seasonal water shortages, China has to consider water resources management as an important factor in the development of shale gas. At present, hydraulic fracturing is one of the core technologies for shale gas development. The water used in hydraulic fracturing mainly comes from surface water, groundwater, and municipal water supply. In the fracturing process, in addition to a large amount of water and sand, a small amount of chemical substances are injected to provide lubrication and sterilization. After fracturing, the previously injected fracturing fluid will flow back to the surface as wastewater, which in addition to containing previously injected chemical substances, also contains chemical substances in the formation and natural radioactive materials. If the concentration of these substances is higher than a certain standard, the wastewater needs to be transported to a designated place for disposal.
Start Stop Batteryis a special battery used by cars with automatic start-stop function. Start Stop Battery can make the car automatically turn off when it is temporarily stopped, and restart the engine when the car is moving forward, which plays a role in energy saving and emission reduction, and also reduces the emission of exhaust gas. The maintenance method of Car Battery is: 1. Start the car regularly and charge the battery; 2, If the electrolyte should is low, should be added distilled water or special fluid; 3, daily driving should often check the battery cover on the hole is ventilated; 4. Check whether the positive and negative levels of the battery are oxidized; 5, check the parts of the circuit for aging or short circuit; 6. Turn off electrical equipment when leaving the car.
The life of Start Stop Battery is generally about 40,000km. During the use of the car, it is recommended that the owner check the electric quantity regularly. Currently, there are two types of Start Stop Battery, one is AGM, adsorbed glass fiber partition battery; The other is the EFB, the enhanced rich liquid battery. Compared with the same specifications of the battery, the start-stop battery has the following advantages :1, cycle charging capacity is 3 times higher than the lead calcium battery, with longer service life, 2, in the whole service life cycle, with higher capacitance stability, 3, low temperature performance is more reliable, 4, reduce the risk of accidents, reduce the risk of environmental pollution, 5, maintenance free, reduce deep discharge.
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