Improved tubular reactor

Abstract

The improved tubular reactor includes one reactant mixing section, one reactant reacting section and one reaction product outputting nozzle. It features the reactant mixing section with one spiral jetting mixer and the reactant reacting section with one spiral mixer. The material contact order and the spiral jetting mixer in the reactant mixing section are regulated properly to control the mixingdegree, contact area and reaction speed to ensure homogeneous mixing of the materials and moderate reaction speed. The spiral mixer in the reactant reacting section mix the gas phase, the liquid phase and the solid phase gradually for homogeneous, smooth, mild and full reaction to form high quality well atomized slurry.

Description

Technical field: [0001] The invention belongs to the key equipment in the production process of chemical fertilizers, in particular to a tubular reactor for gas-liquid phase or liquid-liquid phase reaction in the production process of compound fertilizer by chemical synthesis method, especially with gaseous ammonia or liquid A tubular reactor for the reaction of ammonia with acid or mixed acids. Background technique: [0002] In the compound fertilizer production process, the highest product quality is the chemical synthesis process. The main chemical reaction in the production is the reaction of ammonia and acid or mixed acid, such as phosphoric acid, sulfuric acid, and nitric acid. The currently used ammonification reactors are: There are two kinds of normal pressure and pressurized ammoniation reactors. [0003] Atmospheric pressure ammoniation reactors mostly use stirring tanks with stirring paddles inside. The fluid flow is a mixed flow, and the reactants can be fully ...

AI Technical Summary

Problems solved by technology

Using such a casing jet mixing device can make the mixing of various materials more uniform, but there is still a problem that phosphoric acid and sulfuric acid are mixed first, and the temperature rises and the corrosiveness increases after the sulfuric acid is diluted, so the mixed acid after mixing has a negative effect on T The corrosion of the type mixing tube and the ammonia-passing casing is still serious; in the mixing zone, because the main reactant phosphoric acid and the fastest-reacting sulfuric acid contact with ammonia first, the reaction is carried out prematurely, causing a large amount of ammonia and water to vaporize. Cause local slurry overheating, severe turbulence in the mixing zone, causing scabbing, panting and vibration, and causing material corrosion and aging

[0022] In the mixing area, some do not have a mixing device, and some use a casing jet mixing device. The mixing effect is not ideal, resulting in excessive local reaction, overheating of the slurry, causing scarring, panting and vibration.

[0023] When the mixed materials enter the main reaction zone, some have no mixing device, the reaction is uneven, easy to scar and block, the reaction is not sufficient, and the reaction rate is low; The diversion cone is used for mixing. Due to the high concentration of the reactants, the mixing is too full, the reaction is too violent, the local temperature is too high, scarring and vibration of the reactor are prone to occur, and the reactor is not running smoothly;

[0024] In the reaction section, there is no mixing device, and the slurry is in a state of gas, liquid, and solid separation, which makes the reaction incomplete, the reaction rate is low, and it is easy to scar; some use Venturi or convergent joints that change the flow cross-sectional area, Diversion cone for mixing, high resistance, easy to scar, easy to scar, not suitable for viscous ammonium phosphate slurry

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