October 14, China Chemical Industry News reporter learned from the Coal Science and Technology Research Institute, Coal Research Institute National Coal-Water Slurry Engineering Research Center independent research and development of the third generation of coal-water slurry preparation technology - grain control pilot just finished, coal The slurry concentration of up to 70%, a significant increase in the production of syngas to solve the coal chemical industry's dream of a substantial increase in the concentration of coal slurry for the coal chemical industry is currently at a low ebb brings the gospel.
"Coal gasification is the leading coal chemical industry, coal-water slurry gasifier is actually a heat balance furnace. Coal slurry concentration and effective gas content and gasification efficiency are closely related to the concentration of one percentage point increase in effective gas content increased by 0.7 to 0.8 Percentage points. "Coal Mine Institute of State Coal Water Slurry Engineering Research Center, said Li Fa-lin," If coal slurry carried too much water, it is bound to consume the heat in the system .In order to maintain the same temperature in the furnace, can only increase the oxygen supply If more 1 tonne of water is added into the furnace, 450 standard cubic meters of effective gas can be prolific, 225 square meters of oxygen can be saved, and 450 standard cubic meters of CO2 can be reduced.
Known as the 3.0 version of the third generation of coal-water slurry preparation technology grain control slurry process is the national CWS Engineering Research Center in the second generation of pulping technology grading grinding process based on the upgrading of equipment and technology from . The experimental results show that the pulping concentrations of some good coal types (Yugao and Heishan, Xinjiang) can reach 69% -71%, and the conventional coal gasification concentrations are 66% -68%. If combined with multi-nozzle opposed gasification technology, the effective gas is likely to reach 86% ~ 88%, close to the coal gasification, coal chemical companies in the coal gasification process options to expand the new space.
Li Fulin said that coal-based Institute of National Coal Water Slurry Engineering Research Center, based on the theory of separate accumulation and liquidity to solve the long-troubled pulp industry accumulation efficiency (concentration) and liquidity technical problems to achieve the coal-water slurry particle size Bifunctional discontinuous grading; for the flow of coal slurry viscosity index to express the unscientific development of a special flow meter.
Li Fulin told reporters that the existing coal chemical plant can also be combined with the existing rod mill pulping transformation. Taking the 600,000 tons / year methanol project as an example, the coal slurry concentration increased from 60% to 68% and the water addition per hour decreased by 23.33 tons while the coal consumption remained unchanged, which could produce 10500 standard cubic meters of productive syngas While emitting less CO210500 standard cubic meters), an increase of methanol 5.05 tons / hour, saving oxygen 5249 standard cubic meters / hour. Calculated at 1,800 tons of methanol per tonne, an annual increase of 72.72 million yuan can be achieved. Taking into account the saved oxygen, the annual economic benefit is above 100 million yuan, while the investment for transformation is only about 30 million yuan. At present, the center has completed the development of 600 kt / a methanol-supporting pulping process package and prepared industrial demonstration.
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