2 Bituminous coal and anthracite should be discharged into the specified raw coal tank respectively. The car number, coal type, and slot number should all be numbered and recorded. The groove number mark on the upper and lower parts of the groove should be obvious. Bulk and debris should not be discharged into the tank. Storage time of raw coal in the tank: no more than 2 days for bituminous coal; no more than 4 days for anthracite.
3 When preparing bituminous coal, the drying gas should be inert gas; the oxygen content of the gas at the end of the negative pressure system should not exceed 12%.
4 When grinding bituminous coal, the temperature of the coal mill outlet, coal powder bin, bag filter, spray can, etc. shall be strictly controlled according to the performance parameters of the equipment; for the coal source is stable, and the desiccant atmosphere and temperature can be strictly controlled. System, the temperature limit can be determined according to factors such as coal type.
5 When bituminous coal and anthracite are mixed, the ratio should be stable; the ratio should be measured once a day, and the error should be no more than ± 5%.
6 The gas supply pipelines for charging, fluidizing and blowing of bituminous coal and mixed coal conveying and blowing systems shall be provided with check valves; pulverized coal conveying and blowing pipes shall have bypass facilities for supplying compressed air; When blowing bituminous coal or mixed coal, a nitrogen bypass facility should be provided.
7 When blowing bituminous coal and mixed coal, the pressure, dust collection and fluidization medium of pressure vessels such as warehouse pumps, coal storage tanks and spray cans should be nitrogen or other inert gas.
8 Bituminous coal injection system should be equipped with air control device and non-electrical sequential control system, such as over-temperature, over-pressure, oxygen-containing over-standard accident alarm devices, and devices to prevent and eliminate accidents.
An excavator is a construction machine used to excavate soil. This is to use the bucket teeth on the bucket to cut the soil and put it into the bucket. After filling the soil, lift the bucket and turn it to the unloading site to unload the soil. Then the turntable is rotated, and the bucket is lowered to the excavator surface for the next time. Operation.
Mainly used for engineering construction. Such as: highways, bridges, buildings, breeding ponds, underground engineering, emergency excavation and so on. The main features of excavators are that they are powerful and efficient. They can complete projects that cannot be completed by human beings and improve work efficiency. General engineering teams, construction industry, emergency departments, and even private individuals (excavation and breeding, roads, reclamation) all need excavators.
According to statistics, 60% of the earthwork in construction is done by excavators. In addition, the excavator can also perform various operations such as lifting, piling, ramming, pulling piles, pouring, installation, crushing, demolition, and crushing after replacing the working device.
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