Ammonia water resource utilization process and device

Abstract

The invention provides an ammonia water resource utilization process and device. In order to ensure that the byproduct ammonia water in the ammonia distillation section can be effectively recycled, the ammonia water quality is improved by mainly changing the cyclic recovery mode of an absorption tower and replacing absorption liquid with soft water by aiming at the conditions of low ammonia concentration and instability of a tail gas absorption tower in the original process, concentrated liquor discharged by secondary absorption is supplemented to a primary absorption tower to serve as absorption liquid, and concentrated liquor discharged by the primary absorption tower is supplemented to an ammonia distillation tower to serve as tower top reflux so that the ammonia distillation technological process is optimized. Only one part of the condensed ammonia water reflux tank of the ammonia distillation system discharges concentrated ammonia water, and the problems of field peculiar smell and unstable concentration of two strands of ammonia water caused by irregular concentration discharge of the two-stage tail gas absorption tower are thoroughly and effectively controlled; meanwhile, the fault working conditions of flooding, flooding and the like in the tower caused by blockage of the packed tower and increase of tower pressure drop due to over-high ammonia water concentration in the two-stage absorption liquid are solved, and the problem that resource recycling cannot be realized due to over-low ammonia water concentration is solved and thus the use requirement of flue gas desulfurization and denitrification is met and the production cost is further reduced.

Description

technical field [0001] The invention relates to a high-concentration ammonia nitrogen oxidation liquid stripping deammonization technology for recovering ammonia water, in particular to a process technology for resource utilization of ammonia water. Background technique [0002] Glyphosate crystallization liquid is a kind of wastewater produced in the process of producing glyphosate technical. Its composition is complex, mainly containing organic phosphorus, organic nitrogen and sodium chloride. Direct discharge will inevitably cause serious pollution to the environment. Our company currently The organic wastewater is treated by wet catalytic oxidation technology, the surface is yellow, the pH value is 8-9, and the ammonia nitrogen content of the oxidized wastewater is 4000-6000ppm. [0003] The ammonia nitrogen oxidation wastewater treatment process mentioned in the patent CN201720781613.2 uses a stripping deammonization tower to remove ammonia nitrogen. The tower top conde...

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Problems solved by technology

[0005] The purpose of this technical invention is to propose a scheme for the utilization of ammonia water resources, which mainly solves the problems of the primary tail gas absorption tower, the The concentrated liquid from the tail gas absorption tower directly enters the dilute ammonia water together with the condensate ammonia water to transfer tanks, resulting in problems such as low concentration of dilute ammonia water (6% to 8%) and unstable concentration. The optimization process proposed by the present invention overcomes this technical difficulty , so that the concentration of ammonia water is stabilized in the range of 10%-15%, and it is produced into dilute ammonia water for export, so as to achieve the purpose of resource utilization

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