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According to Yu Zifang, deputy director of the National Synthetic Ammonia Design and Technology Center Station, the comprehensive energy consumption of many small and medium-sized nitrogen fertilizer companies is already lower than that of large-scale equipment. He compared the economic indicators of enterprises in Henan, Anhui, Zhejiang, and Yunnan, and proposed that most of the small and medium-sized nitrogen fertilizer companies have already performed technological transformations on the "three wastes" co-firing burners and auto-enhanced gasification. Under the original raw material route and process conditions, the overall energy consumption is very low and there is basically no room for decline.
Yu Zifang introduced that if the technical transformation of the device is continued, technical transformations can only be carried out for gasification of raw materials, purification of raw materials by air-cooling or low-pressure ammonia synthesis. According to the results of the actual operation of the clean coal gasification technology, it can be found that only the coal-water slurry gasification is truly mature, but the technology investment is too large.
The expert paid the company an account: The new 100,000 ton-grade ammonia plant will need some 280-350 million yuan in investment in the gasification of coal-water slurry. Excluding bank interest, according to the depreciation of chemical equipment for only 10 years, the financial cost per ton of synthetic ammonia will increase by 300 yuan. If you choose Ender furnace or ash fusion, etc., the total investment in the gasification part will also need to be around 150 million yuan, and the cost per ton of synthetic ammonia will increase the financial cost by 150 yuan. In addition, all clean coal gasification technologies require air separation plants and the integrated electricity consumption per ton of synthetic ammonia will increase to 1900 kWh.
Wang Qingxin, general manager of Nanjing Dunxian Chemical Technology Co., Ltd. suggested that small and medium-sized enterprises should not reform the dual low-pressure or double-alkali (alcoholization) process for the time being. In addition to very large capital investment, the technical transformation result can only be synthetic ammonia process electricity. The consumption is reduced by about 120 kWh. He disclosed that a 200,000-ton ammonia ammonia 400,000-ton urea plant of a company in Shandong Province was reformed with bis-methyl (alcoholization) and medium- and high-pressure synthetic ammonia. The project investment was 160 million to 180 million yuan, and the ton of ammonia increased the financial cost by 80 to 90. Yuan, while reducing the economic benefits of electricity consumption is only 82.8 yuan per ton of ammonia.
For this reason, experts have unanimously proposed that small and medium-sized nitrogenous fertilizer companies should implement transformations in the aspects of by-product steam low-pressure co-alcohols, evaporative cold utilization, compressor energy-saving gas valves, and develop and popularize new technologies in the downstream products such as methylal and urea.
Small and medium-sized nitrogenous fertilizer companies should look for value-added highlights
In the current situation where small and medium-sized nitrogenous fertilizer companies are generally under-profitable, should companies invest heavily in technological transformation projects? When the reporter interviewed the nitrogen fertilizer industry experts last week, they all reminded SMEs: According to the regulations of the relevant state authorities on restraining overcapacity and redundant construction in some industries, no coal chemical projects will be approved within 3 years, and no major coal chemical projects will be launched. Small and medium-sized nitrogenous fertilizer companies will have an adjustment period of at least 3 years. During this period, nitrogen fertilizer companies should not invest blindly, but should look at their own actual situation, to find items that can add new production value and high added value, such as the development and application of new technologies in the aspects of by-products such as steam low-pressure co-alcohol and urea downstream products.