Latest progress on the commissioning of Sinochem Fuling’s 200,000-ton synthetic ammonia plant
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Latest Progress on the Commissioning of Sinochem Fuling’s 200,000-ton Ammonia Synthesis Plant Author/Source: Gasification World Date: June 4, 2022 Clicks: 14 Recently, Sinochem Fuling’s ammonia synthesis plant has completed the civil construction work; 234 pieces of equipment have been installed, more than 36,000 meters of pipelines have been laid, and nearly 400,000 meters of electrical and instrumentation cables have been installed. All equipment, electrical systems, and instrumentation in the plant have been tested and adjusted. Currently, the ammonia synthesis plant has started up for temperature testing. At 15:10 on May 27, the joint commissioning of the dry absorption section in the sulfuric acid plant was successful, indicating that this section is now ready for operation. At 14:30 on May 22, the three cooling tower fans at the acidic circulating water station of the phosphate plant were successfully started and operated normally, with the individual unit tests concluding successfully. At 5:18 p.m. on May 18, the synthetic ammonia plant began the heating and reduction process for the low-temperature shift catalyst, marking the official entry of the synthetic ammonia unit into the commissioning phase. Project Overview: The Sinochem Fuling environmental protection relocation project involves the reconstruction of a 200,000-ton/year ammonia synthesis plant at its original site. The project uses natural gas as raw material, and employs iron-manganese and zinc oxide for desulfurization, first-stage conversion, second-stage conversion, iron-based high-temperature shift, copper-catalyzed low-temperature shift, an improved thermal potassium-alkali method for decarburization, methanation, deep-cold purification, and then ammonia synthesis. The Sinochem Fuling Environmental Protection Relocation Project is located in Group 1, Shaolou Village, Baitao Chemical Industrial Park, Fuling, Chongqing. The first phase is a project for 200,000 tons per year of fine phosphates and associated new specialty fertilizers. Construction of a 800,000-ton/year sulfur-based sulfuric acid plant, a 1.2 million-ton/year mineral processing plant, a 300,000-ton/year wet-process phosphoric acid plant (100% P2O5), a 100,000-ton/year phosphoric acid purification plant, a 50,000-ton/year potassium dihydrogen phosphate plant, a 50,000-ton/year high-grade flame-retardant fire-fighting material plant, a 100,000-ton/year medium-grade flame-retardant fire-fighting material plant, 2×200,000-ton/year specialized fertilizers, a 300,000-ton/year multi-element acidic physiological specialty fertilizer plant, a 200,000-ton/year synthetic ammonia plant (to be relocated and rebuilt in its original location), a 25,000-ton/year sodium fluosilicate plant, a 600,000-ton/year cement retarder plant, a 300,000-ton/year building gypsum powder plant, as well as temporary storage facilities for phosphogypsum and associated utility systems and auxiliary facilities. The first phase of Sinochem Fuling Chemical’s environmental protection relocation project involves an investment of 3 billion yuan.
May I ask what the reduction pressure for ammonia synthesis catalysts is? I can provide low-pressure ammonia synthesis catalyst reduction technology. It can significantly reduce the cost of synthetic ammonia.
Introduction to the reduction technology of low-pressure ammonia synthesis catalysts. The reduction of ammonia synthesis catalysts is an important step in the production of ammonia, and the pressure used in this reduction process is a key factor that determines the service life and activity of the catalysts, as well as the specific consumption of ammonia and the production capacity of the ammonia synthesis plant. Generally, the reduction pressure specifications for synthesis catalysts recommended by catalyst manufacturers and various ammonia synthesis plants are around 5 MPa. Through relevant calculations and coordination with the on-site equipment, this value can be reduced by half; as a result, the residence time of water vapor in the synthetic ammonia catalyst reduction gas within the synthesis tower is also reduced by half. In other words, the probability of the synthetic ammonia catalyst being damaged by water vapor in the reduction gas is decreased by half. The activity of the synthetic ammonia catalyst after final reduction is significantly improved. This is particularly evident in iron-based ammonia synthesis catalysts, as such catalysts result in a low temperature of the effluent water and a fast rate of water output during the main operation phase; if this water vapor cannot be removed from the tower in a timely manner, the ammonia synthesis catalyst will suffer severe contamination. These are also important reasons why the superiority of many synthetic ammonia catalysts fails to be demonstrated in actual production. Although catalyst manufacturers currently widely use pre-reduced catalysts to replace in-situ reduction, due to objective limitations, the use of pre-reduced catalysts can only shorten the heating and reduction time required for the catalysts; it cannot change the fact that these catalysts retain low activity after reduction, failing to achieve the desired results. This is also why the reduction of ammonia synthesis catalysts under low pressure is not merely a modification of a reduction parameter, but rather becomes an important aspect of the technology involved in ammonia production. Moreover, this pressure indicator cannot be reduced simply by wishing to do so, as it is subject to various constraints. Low-pressure ammonia synthesis reduction technology can not only be applied in chemical engineering
With the support of basic data, the appropriate pressure for reducing ammonia synthesis catalysts can be determined based on the capacity of the on-site ammonia synthesis plant, along with specific control measures. If implemented, this technology will undoubtedly demonstrate its extraordinary unique appeal and significant economic benefits. It will also provide a fair assessment of some low-temperature brand synthetic ammonia catalysts, revealing their true high-quality nature. With the support of basic data, the appropriate pressure for reducing ammonia synthesis catalysts can be determined based on the capacity of the on-site ammonia synthesis plant, along with specific control measures. If implemented, this technology will undoubtedly demonstrate its extraordinary unique appeal and significant economic benefits. It will also provide a fair assessment of some low-temperature brand synthetic ammonia catalysts, revealing their true high-quality nature.