Science and Technology Daily News (Qu Jian) China Coal Science and Industry Group recently revealed that the first long-distance "coal to and ash to" transportation system in China built by the EPC general contract of its affiliated Shenyang Design Institute-Shenhua Nortel Shengli Energy Co., Ltd. The project from No. 1 open-pit coal mine to Shengli Power Plant was officially transferred to the owner and put into operation.
The system creatively solves the major technical research and engineering design problems of the bulk material transportation system in the alpine region, such as poor operating environment and high environmental protection requirements, and realizes multiple demonstrations of high efficiency, energy saving, high intelligence, and green environmental protection.
According to the China Coal Science and Industry Group, in accordance with the high standard requirements of "no coal and no ash", Shenyang Design Institute has innovatively proposed a design scheme of "coal coming and ash removal": the same belt conveyor is used for surface transportation. Coal and lower belt surface ash transportation. The construction scale is forward coal transportation 10 million tons/year, reverse transportation humidity control ash 2 million tons/year, and the main conveyor belt conveyor has a single length of 8,642 meters.
In order to avoid villages, wetlands, railways, highways, bridges and culverts, the project uses curved horizontal turns and spatial turns for three times; for horizontal turns, the relationship between the relevant parameters of the horizontal turning section is accurately calculated to ensure that the centripetal force and centrifugal force generated by the conveyor in the turning section are balanced , The material and the conveyor belt smoothly realize natural turns, without deviation or sprinkling; in order to reduce the belt strength, the conveyor system adopts a multi-point driving arrangement of head 2 in 2 tails and 1; to prevent "coal coming and ash removal" from occurring along the way For dust, special "n"-shaped protective cover, ash humidifying and stirring device, and EDEM curve blanking chute are used; in order to reduce the dust generated by the belt beating caused by the radial beating of the idler, special materials are selected for the environmental conditions on the spot. Noise roller to reduce vibration and noise during operation.
Through a number of technological innovations and applications, it is possible to transport coal from the open-pit coal mine to the pithead power plant, and at the same time transport the burned fly ash from the power plant to the open-pit mine backfill, avoiding a series of pollution problems caused by automobile transportation. Protect the beautiful ecological environment of the grassland.
It is reported that Xilinhot, where the project is located, has a mid-temperate semi-arid continental climate, with windy spring, little rain in summer, and severe cold in winter, with the annual minimum temperature reaching minus 40 degrees Celsius.
In such a harsh environment, the long-distance curved belt conveyor has achieved a successful one-time test run without load, heavy load, and heavy load of coal ash. The conveyor belt has "zero" deviation, all parts of the belt conveyor are operating normally, and the control system And various protections work normally, no dust escapes along the line, and all technical indicators meet the design requirements.