Tail gas recovery device for urea ammonium nitrate solution production

Abstract

The invention provides a tail gas recovery device for urea ammonium nitrate solution production. The tail gas recovery device for the urea ammonium nitrate solution production comprises a urea ammonium nitrate solution preparing tank, an absorbing tower, a buffer tank, a circulating pump, a cooler and an injecting pump. The absorbing tower comprises a filling support plate, a filling pressing plate, filling and a distributor; the outlet of the urea ammonium nitrate solution preparing tank is connected with the lower inlet of the side wall of the absorbing tower; the top outlet of the absorbing tower is connected with the inlet of the choke of the injecting pump; the outlet of the circulating pump is connected with the inlet of the cooler; the outlet of the coller is connected with the inlet of the upper end of the side wall of the absorbing tower through a first pipe; the first pipe is connected with a second pipe towards an acid tank, the connecting position of the first pipe and the second pipe is a node A, and the portion of the first pipe between the node A and the cooler is connected with the inlet of the other end of the injecting pump. The tail gas recovery device for the urea ammonium nitrate solution production is simple in technical design, effectively recovers gaseous ammonia in tail gas and reduces consumption and environmental pollution.

Description

technical field [0001] The invention belongs to the field of chemical fertilizers, in particular to a tail gas recovery device in the production of urea ammonium nitrate solution. Background technique [0002] Urea Ammonium Nitrate solution (Urea Ammonium Nitrate solution), referred to as UAN solution, also known as nitrogen solution (N solution) abroad, is prepared from urea, ammonium nitrate and water. UAN solution is a stable, colorless, normal-pressure liquid nitrogen fertilizer, which is superior to solid nitrogen fertilizer in terms of fertilizer efficiency, energy saving, environmental pollution reduction, and economic benefits, and has broad prospects at home and abroad. [0003] UAN production began in the United States in the 1970s and is now widely used. In 2013, the global output of urea ammonium nitrate solution exceeded 20 million tons. my country is a big producer of nitrogen fertilizer. The production equipment of UAN is in its infancy, and its application p...

AI Technical Summary

Problems solved by technology

Since UAN production is prepared under normal pressure, gas ammonia is discharged through the vent pipe on the upper part of the UAN preparation tank, causing large pollution and loss. Production statistics show that the loss rate is about 0.1-0.2%, that is, the production of 100 tons of UAN products, gas Ammonia loss is 100-200kg

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