Sulfamic acid production device

Abstract

A sulfamic acid production device comprises: a sulfuric acid storage tank, wherein a reaction kettle is arranged below the sulfuric acid storage tank, the sulfuric acid storage tank is connected withthe reaction kettle through a pipeline, and a volumetric flowmeter and a first electromagnetic valve are arranged on the pipeline between the sulfuric acid storage tank and the reaction kettle; the top of the sulfuric acid storage tank is communicated with a sulfuric acid liquid inlet pipe, the top of the reaction kettle is connected with the bottom of the urea feeding device through a pipeline, the top of the urea feeding device and the top of the urea feeding device are arranged in an opening mode, and a urea pool is arranged below the urea feeding device;the urea in urea pool is fed into urea feeding device through spiral feeder, and a urea quantitative feeding device is arranged in urea feeding device. According to the invention, urea can be continuously and automatically added, it isguaranteed that the reaction is normally conducted, meanwhile, sulfur trioxide can be prevented from leaking into air to pollute the environment, so taht the healthy production environment is guaranteed, and the reaction can be carried out successfully.

Description

technical field [0001] The invention belongs to the field of sulfamic acid production, in particular to a sulfamic acid production device. Background technique [0002] Sulfamic acid, also known as solid sulfuric acid, has the same strong acidity as hydrochloric acid and sulfuric acid in its aqueous solution. In various fields such as pesticides, herbicides, anti-drying agents and standard analytical reagents. [0003] At present, the production process of sulfamic acid mainly adopts the oleum method with oleum and urea as raw materials, and the sulfuric acid method with urea, sulfur trioxide and sulfuric acid as raw materials. The urea required for the reaction is conveyed by the motor-driven conveying device, and the urea at the feed port is added manually, which increases the labor intensity of the workers. Adding one bag after another has the risk of sulfur trioxide leakage, polluting the environment, and causing harm to the health of the workers. threaten. Fuming sul...

AI Technical Summary

Problems solved by technology

The urea required for the reaction is conveyed by the motor-driven conveying device, and the urea at the feed port is added manually, which increases the labor intensity of the workers. Adding one bag after another has the risk of sulfur trioxide leakage, polluting the environment, and causing harm to the health of the workers. threaten

Fuming sulfuric acid and sulfuric acid are injected into the reactor at one time before urea is put in, which is easy to aggravate the occurrence of side reactions and decrease the yield

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