From the 25th National Nitrogen Fertilizer Plant's recently concluded experience exchange on technological transformation, it was learned that a key technology for a new urea synthesis method with independent intellectual property rights, the high-pressure liquid-gas fast tubular reactor, has been developed by the Beijing Aerospace Power Institute. The development was successful and was favored by medium and small fertilizer manufacturers.
According to reports, for the annual production of 100,000 tons of aqueous solution full-cycle urea process system, using this patented technology to transform the urea synthesis section, the carbon dioxide conversion rate can be increased by more than three percentage points, the annual savings of steam costs about 1.5 million - 2 million yuan, and brings obvious energy-saving benefits for the separation, concentration, return and other systems of the entire installation.
It is reported that the core of this patented technology is to be able to atomize large flow and high pressure liquids to 100-350 microns in a small space and mix with gaseous media to form a mixture similar to "homogeneous". It can solve the problem of material mixing in urea synthesis towers, and can also be applied under other similar conditions.
The researcher Liu Xiaodi, the patent holder of the invention patent, introduced that in the aqueous solution full-cycle urea production process, various measures are usually taken in the urea synthesis tower to improve the material mixing process and reaction process to increase the synthesis efficiency of the urea synthesis tower (CO2 Conversion rate), its fundamental approach is to solve the problem of material mixing under conditions of high pressure, large flow, and small space. If the three materials entering the synthesis tower, namely liquid ammonia, liquid methylamine solution, and gaseous carbon dioxide, are well mixed to form a "homogeneous" stream and then enter the synthesis tower, the mixing in the urea synthesis tower will be achieved. The problem is completely solved. At the same time, in any section of the synthesis tower, the speed, temperature, concentration, and density of the material are completely uniform. This prevents back mixing of the materials and ensures the reaction efficiency of the synthesis tower.
According to reports, for the annual production of 100,000 tons of aqueous solution full-cycle urea process system, using this patented technology to transform the urea synthesis section, the carbon dioxide conversion rate can be increased by more than three percentage points, the annual savings of steam costs about 1.5 million - 2 million yuan, and brings obvious energy-saving benefits for the separation, concentration, return and other systems of the entire installation.
It is reported that the core of this patented technology is to be able to atomize large flow and high pressure liquids to 100-350 microns in a small space and mix with gaseous media to form a mixture similar to "homogeneous". It can solve the problem of material mixing in urea synthesis towers, and can also be applied under other similar conditions.
The researcher Liu Xiaodi, the patent holder of the invention patent, introduced that in the aqueous solution full-cycle urea production process, various measures are usually taken in the urea synthesis tower to improve the material mixing process and reaction process to increase the synthesis efficiency of the urea synthesis tower (CO2 Conversion rate), its fundamental approach is to solve the problem of material mixing under conditions of high pressure, large flow, and small space. If the three materials entering the synthesis tower, namely liquid ammonia, liquid methylamine solution, and gaseous carbon dioxide, are well mixed to form a "homogeneous" stream and then enter the synthesis tower, the mixing in the urea synthesis tower will be achieved. The problem is completely solved. At the same time, in any section of the synthesis tower, the speed, temperature, concentration, and density of the material are completely uniform. This prevents back mixing of the materials and ensures the reaction efficiency of the synthesis tower.