The freezing method of phosphorus nitrate fertilizer technology is internationally advanced

Recently, by Guizhou Batian Ecological Engineering Co., Ltd. and Tianjin Huajing Chemical New Technology Development Co., Ltd. jointly developed and industrialized the application of the first set of domestic frozen phosphorus nitrate fertilizer device technology, in Guizhou Province, Yan'an County through the China Nitrogen Fertilizer Industry Association organized scientific and technological achievements identification. The expert group agreed that the project has the remarkable characteristics of difficulty and high degree of innovation, advanced technical indicators, and the overall technology has reached the international advanced level.
China Nitrogen Fertilizer Industry Association Chairman Gu Zongqin as the group leader, Tianji Group's former chairman Wang Guangxuan as the deputy group leader of the appraisal committee pointed out that the frozen phosphorus nitrate fertilizer technology to achieve the comprehensive utilization of phosphorus resources, the calcium in the phosphorus mine production ammonium nitrate calcium products, non-phosphorus gypsum emissions, for China's fertilizer industry development out of a new road
China
. It is suggested that Batian company continue to summarize and upgrade the technology, strengthen the comprehensive development and utilization of fluorine and other companion elements and acid insolubles, and accelerate the promotion and application of the technology in the fertilizer industry. The development and application of the localization of the frozen phosphorus nitrate fertilizer plant has realized the vision of the key promotion of China's fertilizer industry put forward during the "6th Five-Year Plan" period.
five innovations have been made in this technology: the treatment of acidic and alkaline exhaust gas in the device has been solved. To achieve zero discharge of process wastewater; Improve and innovate the separation process of acid insolubles; Improve the development of new acid coolers; The core equipment of phosphorus nitrate fertilizer double-turn drum filter, double-axis granulator, NP slurry concentrate evaporator, crystallizer, etc. have achieved localization.huang Deming, general manager of
Batian Company, told China Chemical News that under the difficult situation of the development of phosphorus nitrate fertilizer in China, Batian company from the perspective of plant chain nutrition, the organization of science and technology. In June 2012, the introduction of a number of phosphate nitrate fertilizer talent, and Tianjin Huajing New Technology Co., Ltd. signed an agreement to jointly develop phosphate nitrate fertilizer and ammonia calcium nitrate technology. On April 18, 2013, the first phase of the Batian Phosphorus Chemical Cycle Economy and Ecological Industry project was officially launched×, with the construction of 270,000 tons/year nitric acid, 215,000 tons of nitrate phosphorus fertilizer project and by-product 210,000 tons of ammonium nitrate calcium, 2×3 million tons/year tower compound fertilizer project and supporting public works projects×
, chief engineer of TheRabartian Company, introduced the research and development of the technology. Acid insolubles exist in the acid insoluble after nitric acid decomposition phosphate, for which there is no mature separation technology at home and abroad, the existing separation technology removal rate of about 10%, can not meet the separation requirements. In order to solve this difficult problem, the project team has studied flocculation sequestration, horizontal helical separation, pressure filter and other technologies, developed a pressure filter machine and filter aid as the core technology of acid insoluble separation process, acid insoluble removal rate of more than 90%. Since then, they have developed the first set of nitrate phosphorus fertilizer containing ammonia alkaline wastewater treatment technology, as well as ammonium nitrate calcium production technology, to solve the traditional phosphate fertilizer process by-product Ca (NO3) 2.4H2O reuse problem, to achieve the goal of phosphorus mineral resources dry and squeezed.
the technical difficulties, Patta started the process of industrial applications. On March 18, 2015, the project project boiler feed through the process; On May 18, the whole process of phosphorus nitrate fertilizer plant was opened to produce the first phosphorus nitrate fertilizer; On May 26, the whole process of ammonia calcium nitrate device was opened to produce the first ammonium nitrate calcium. It took only 2 years from the start of the project to the birth of the first domestically produced phosphorus nitrate fertilizer device.
after, they have formulated three steps to achieve the production standards of the assessment target, in January and August this year, respectively, carried out two 100% load assessment, key indicators to meet the assessment requirements, the device to achieve the production standards.
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phosphorus nitrate fertilizer refers to the use of nitric acid to break down phosphorus ore produced containing nitrogen and phosphorus disincomposition fertilizer. Its main feature is that when nitric acid decomposes phosphorus ore, nitric acid is used as an acid antidote to transform P2O5 in phosphorus ore into a form that can be absorbed by crops. At the same time, it is also left in the product as nitrogen fertilizer, playing the role of nitrogen with phosphorus. In this way, the cost of nitric acid can be included in the production costs of nitrogen fertilizer, because it can be made without sulfuric acid phosphorus fertilizer, economic advantages.
Calcium nitrate fertilizer by-product of calcium nitrate can be used to produce ammonium nitrate calcium and other products, without sulfuric acid there is no by-product phosphorus gypsum solid waste storage pollution problem, so phosphorus nitrate fertilizer in environmental protection also has certain advantages.
there are two main production process technologies of phosphorus compound fertilizer in China, one is ammonium phosphate products represented by the U.S. sulfate method and the other is the phosphorus nitrate fertilizer products represented by the European nitric acid method. China's coal-rich sulfur-deficulfuration energy structure characteristics, the development of phosphorus nitrate fertilizer in line with the needs of national conditions.
compared with the existing process, the frozen phosphorus nitrate fertilizer technology developed by Batian does not produce phosphorus gypsum, which solves the pain point of "phosphorus gypsum" solid waste storage and reuse; Compared with the introduction of the cooling method phosphorus nitrate fertilizer device, the introduction of the device to produce calcium carbonate co-production cement, but calcium carbonate with about 1.5% of nitrogen, will cause the cement rotary kiln exhaust yellow smoke, NOX serious problem, Pattian technology to solve the environmental protection under the high pressure cement device production limit pain point.
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