Production process of pyrolysis cyanuric acid

Abstract

The invention discloses a production process of pyrolysis cyanuric acid, comprising: pumping liquid urea at 132-140 DEG C continuously at a flow speed of 5-6 m / s under 5-10 m<3> / h into a roller barrel into which superheated steam at a temperature of 50-500 DEG C under a pressure of 3-4 Mpa under 500-1000 m<3> / h is introduced, polymerizing urea at 250-280 DEG C to generate crude cyanuric acid, refining the crude cyanuric acid from the roller kiln, and then preparing cyanuric acid 98.5-99% in purity. Heat required for melting urea can be saved, energy consumption can be effectively reduced, high-temperature steam produced in byproduct acid production from sulfur is used to provide heat, the defects such as low heat utilization rate of hot air, high coal firing consumption and high post-treatment cost of pollutants are overcome, zero environmental pollution is caused, heat loss is low, material consumption is low, product quality is stable, and product yield is high; operating is facilitated, safety is high, an operating environment is good, labor intensity is low, carbon emission is reduced, environmental pollution is reduced, heat utilization is increased, and product quality is improved.

Description

technical field [0001] The invention relates to cyanuric acid, in particular to a cyanuric acid production process. Background technique [0002] Cyanuric acid (English name cyanuric acid) is also known as tricyanuric acid (tricyanic acid); 2,4,6-trihydroxy-1,3,5-triazine; 2,4,6 trihydroxy-s-triazine (2 , 4,6-triazinettriol); s-triazinetriol (sym-triazinetriol). The chemical formula is C3H3N3O3. Cyanuric acid can be used to synthesize chlorinated derivatives, salts, lipids; trichloroisocyanuric acid; sodium or potassium dichloroisocyanurate; can be used to synthesize cyanuric acid-formaldehyde resin, epoxy resin, antioxidant, coating, Paints, adhesives, pesticide herbicides, metal cyanide corrosion inhibitors, polymer material modifiers, etc.; can be used in the production of pharmaceutical halotrihydroxyzine; synthesize new bleaching agents; can be used in swimming pool chlorine stabilizers, sterilization, detoxification It can also be directly used as raw materials for ...

AI Technical Summary

Problems solved by technology

The gas generator needs to consume a large amount of coal, 330Kg of coal is consumed for producing one ton of cyanuric acid, 16,500 tons of coal is consumed for 50,000 tons of cyanuric acid per year, and a large amount of waste gas is produced by burning coal: 16,500 tons of coal produces 264 tons of SO 2 , 42240 tons of CO 2 , must be equipped with desulfurization, dust removal waste gas treatment facilities, not only the investment is large, but also a large amount of pollutants will be discharged into the atmosphere after the waste gas treatment, causing environmental pollution

In order to ensure the reaction conditions of 250-280°C in the pyrolysis furnace, the temperature of the hot air exiting the pyrolysis furnace must be maintained at 230-280°C. The blower blows into the gas burner, sends it to the inner pipe of the pyrolysis furnace, and then is drawn out by the induced draft fan, which consumes a lot of power

At the same time, there are still hidden safety hazards such as gas leakage, poisoning, and deflagration in the gas generator.

[0020] To sum up, the current method of providing heat source for pyrolysis of cyanuric acid is mainly the hot air at 650-850 °C produced by the combustion of coal gas generated by the gas generator. High, does not comply with the national environmental protection policy, is not conducive to the healthy development of the enterprise, and consumes a lot of power and poses a great safety risk