Nitrogen fertilizer companies meet the standard emission problems have solved the low pressure gas
2021-03-16 07:20:38
The nitrogen fertilizer companies built around several major water systems in the country were facing suspension of production and rectification due to excessive liquid discharge. The reporter learned yesterday that the ammonia ammonia urea waste liquid processing device independently developed by Ningbo Far East Chemical Technology Co., Ltd. has solved the problem that the waste liquids that are common to nitrogen fertilizer enterprises are difficult to discharge and pollute the environment. Once the technology is introduced, it will be affected by small and medium sized nitrogen fertilizer plants. The blitz.
This technology has deep hydrolysis of the condensate in the urea process so that the NH3 in the urea discharge solution is ≤5×10-6, Ur≤5×10-6, and it is now available in Shandong Yankuang Chemical Co., Ltd. and Gansu Liuhua. (Group) Co., Ltd., Shandong Ruixing Chemical Group Co., Ltd. and other units applied, the operation results fully meet the design requirements, and achieved ideal economic and environmental benefits.
It is understood that a batch of urea plants with an annual output of 40,000 to 150,000 tons of aqueous solution that were completed in the 1990s in China have been treated. After the original design, the process condensate was treated and discharged by the desorption tower. The desorbed residual ammonia contained 0.07% of ammonia. , containing 1.1% urea. After the transformation, the production capacity of most of the urea plants of nitrogen fertilizer companies has greatly exceeded the original design value, but the process condensate processing equipment has not been basically transformed. The content of ammonia and urea in the desorption residual solution discharged from the desorption tower during the actual production process of the device is much higher than the original design value, which is not only unfavorable to the environmental protection of the company's region, but also greatly increases the consumption of the product. Corporate competitiveness.
Ningbo Yuandong Chemical Technology Co., Ltd. has successfully developed urea medium pressure hydrolysis technology and low pressure hydrolysis technology in the treatment of urea process condensate for the technical problems faced by nitrogen fertilizer companies. This technology with independent property rights has obtained national invention patents.
According to reports, the low-pressure gas extraction and hydrolysis technology is particularly suitable for urea enterprises that cannot autoclave high-pressure steam. It combines the hydrolysis tower and the desorption tower into one, simple process and operation, does not affect the original device, less investment in equipment, ammonia, CO2, H2O recovered in the hydrolysis unit returns to the urea medium pressure system in the form of liquid, greatly reducing the Two cycles and a cold load, together with the urea plant wastewater and ammonia plant wastewater treatment, a wider range of applications. A set of annual output of 240,000 tons of urea plant application of the technology, one year can add 2.5 million yuan benefit, about 2 years to recover all the investment. At present, the urea deep hydrolysis unit designed by Ningbo Far East Company has already operated 5 sets in China and 12 sets are under construction.
This technology has deep hydrolysis of the condensate in the urea process so that the NH3 in the urea discharge solution is ≤5×10-6, Ur≤5×10-6, and it is now available in Shandong Yankuang Chemical Co., Ltd. and Gansu Liuhua. (Group) Co., Ltd., Shandong Ruixing Chemical Group Co., Ltd. and other units applied, the operation results fully meet the design requirements, and achieved ideal economic and environmental benefits.
It is understood that a batch of urea plants with an annual output of 40,000 to 150,000 tons of aqueous solution that were completed in the 1990s in China have been treated. After the original design, the process condensate was treated and discharged by the desorption tower. The desorbed residual ammonia contained 0.07% of ammonia. , containing 1.1% urea. After the transformation, the production capacity of most of the urea plants of nitrogen fertilizer companies has greatly exceeded the original design value, but the process condensate processing equipment has not been basically transformed. The content of ammonia and urea in the desorption residual solution discharged from the desorption tower during the actual production process of the device is much higher than the original design value, which is not only unfavorable to the environmental protection of the company's region, but also greatly increases the consumption of the product. Corporate competitiveness.
Ningbo Yuandong Chemical Technology Co., Ltd. has successfully developed urea medium pressure hydrolysis technology and low pressure hydrolysis technology in the treatment of urea process condensate for the technical problems faced by nitrogen fertilizer companies. This technology with independent property rights has obtained national invention patents.
According to reports, the low-pressure gas extraction and hydrolysis technology is particularly suitable for urea enterprises that cannot autoclave high-pressure steam. It combines the hydrolysis tower and the desorption tower into one, simple process and operation, does not affect the original device, less investment in equipment, ammonia, CO2, H2O recovered in the hydrolysis unit returns to the urea medium pressure system in the form of liquid, greatly reducing the Two cycles and a cold load, together with the urea plant wastewater and ammonia plant wastewater treatment, a wider range of applications. A set of annual output of 240,000 tons of urea plant application of the technology, one year can add 2.5 million yuan benefit, about 2 years to recover all the investment. At present, the urea deep hydrolysis unit designed by Ningbo Far East Company has already operated 5 sets in China and 12 sets are under construction.
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