A kind of device and method for producing ammonium sulfate

Abstract

The invention discloses a device and method for producing ammonium sulfate. The device comprises a neutralization and crystallization reactor, a thickener, a decanter, a centrifugal machine and a fluidized bed dryer which are connected through a pipeline, wherein the thicker comprises a settling section, a thickening section and an elutriating section which are sequentially connected from top to bottom; the decanter is horizontal and is divided into a light-phase area and a heavy-phase area by a baffle plate; the centrifugal machine is a horizontal double-stage piston pushing type centrifugal machine; the fluidized bed dryer is a horizontal multi-stage fluidized bed dryer, and the interior of the dryer is divided into a feeder drying area and a product cooling area; the neutralization and crystallization reactor comprises a cylinder body in which an inner circulation passage formed by a flow guiding cylinder, a backflow baffle plate and a stirrer is arranged, and an outer circulation passage formed by a crystallizer circulating pump is arranged outside the cylinder body. According to the method for producing the ammonium sulfate, the ammonium sulfate is produced by a neutralization and crystallization one-step method, so that the energy can be saved and the power consumption can be reduced; in addition, the flow can be shortened, and the investment is reduced.

Description

technical field [0001] The invention relates to a caprolactam production technology, in particular to a device and method for producing ammonium sulfate (ammonium sulfate). Background technique [0002] Caprolactam is an important organic material, which is mainly used to prepare caprolactam resin, fiber and artificial leather, etc. It is also used as a raw material for medicine. In the past, my country needed to import a large amount. After continuous exploration and innovation in recent years, my country already has mature and advanced Caprolactam production technology, my country's caprolactam has entered a period of great development. About 1.5-1.6 tons of ammonium sulfate can be produced by producing 1 ton of caprolactam. With the construction of a large number of caprolactam plants, the output of byproduct ammonium sulfate will also increase significantly. [0003] In the production process of caprolactam, the rearrangement liquid (the mixture of caprolactam 50%wt and ...

AI Technical Summary

Problems solved by technology

There are two main problems in this production method: one is that neutralization and crystallization are carried out in two processes respectively, the process is long, the equipment is many, and the investment is high

The second is the unreasonable utilization of energy. The heat released by the neutralization reaction needs to be removed by circulating water, which cannot be utilized, and the crystallization process needs low-pressure steam to provide a heat source.

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