Glass candle holder, glass jar candle holder
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This large-scale fertilizer plant was introduced from Japan in the early 1970s. It has a large-scale, single-series, high degree of automation, with a total investment of 262 million yuan. The device broke ground on May 7, 1974, completed and put into production on June 22, 1976, and produced synthetic ammonia. On July 2, it produced qualified urea.
The history of the operation of this device was also a history of development and innovation. In the past 30 years, based on the study, digestion and absorption of imported technology, Sichuan Chemical has successively conducted more than 20 technical transformations and more than 100 technical innovations. In 1985, for the first time in the country, the computer technology was successfully applied to optimize the control of large-scale fertilizer production. The innovation of this device technology won the “National Prize for Progress in Science and Technologyâ€. In 1991, the synthesis tower was reformed to reduce the pressure in the synthesis tower from 24MPa to 20MPa, which increased the production capacity of the plant and extended the service life of the equipment. In 1998, Sino-Japanese cooperation carried out a section of the waste heat recovery and reconstruction project of the furnace and received significant benefits of energy saving and environmental protection. In 2001, the large-scale technical transformation of the urea system was carried out, which increased the variety of urea products and improved the market's competitiveness.
At present, the device operates smoothly and is in full compliance with the national environmental protection discharge standards. The production situation is increasingly promising.
The first domestic production of large-scale fertilizer plant introduced cumulative production of 8.95 million tons of synthetic ammonia and 13.57 million tons of urea for 30 years.
So far, the first large-scale fertilizer plant introduced in China, Sichuan Chemical Group's second fertilizer plant 300,000 tons/year of synthetic ammonia and 480,000 tons/year of urea plant have been put into production for 30 years. As of May 2006, this large chemical fertilizer plant has cumulatively produced 8.95 million tons of synthetic ammonia and 13.79 million tons of urea.