Improved tubular reactor

A tubular reactor, reaction technology, applied in chemical/physical/physical chemistry nozzle reactor, application, chemical method of reacting liquid and gas medium, etc., can solve the problem of uneven reaction, incomplete reaction, easy The problems of scarring and blockage can be improved to improve the flexibility of adaptability and operation, improve the stability and safety, and prevent the reaction speed from being too fast.

Inactive Publication Date: 2007-06-27
中国-阿拉伯化肥有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 r...

Method used

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Effect test

Embodiment 1

[0078] In the tubular reactor of the present invention, three spiral guide fins are fixed on the outside of the central tube, the direction of rotation is clockwise, the rotation angle θ is 5°, and the inclination angle Ф is 0°. The reaction in the tubular reactor A spiral mixing device 4 is installed at the inlet of the section, and a spiral mixing device 2 identical to the spiral mixing device 4 is installed in front of the reactant output nozzle. There are 3 spiral guide fins, the direction of rotation is clockwise, and the rotation angle α is 5°, the inclination angle β is 0°, under the same dosage, there is no scarring, panting, vibration, and the pressure of the tubular reactor is 3-5kg / cm 2, the pressure is stable, the reaction and injection of the tubular reactor are normal, and the noise is 50 decibels. After 30 days of use, the polytetrafluoroethylene entering the spiral mixer in the reaction section only appears yellow in color and has no cracks. The stainless steel...

Embodiment 2

[0087] The tubular reactor of the present invention is fixed with 10 spiral guide fins on the outside of the central tube, the rotation direction is clockwise, the rotation angle θ is 45°, and the inclination angle Ф is 45°. The reaction in the tubular reactor A spiral mixing device 4 is installed at the entrance of the section, and a spiral mixing device 2 identical to the spiral mixing device 4 is installed in front of the reactant output nozzle. There are 6 spiral guide fins, the direction of rotation is clockwise, and the rotation angle α is 45°, the inclination angle β is 30°, under the same dosage, there is no scarring, panting, vibration, and the pressure of the tubular reactor is 3-5kg / cm 2 , the pressure is stable, the reaction and injection of the tubular reactor are normal, and the noise is 55 decibels. After 30 days of use, the polytetrafluoroethylene entering the spiral mixer in the reaction section only appears yellow in color and has no cracks. The stainless ste...

Embodiment 3

[0091] The tubular reactor of the present invention is fixed with 5 spiral guide fins on the outside of the central tube, the rotation direction is clockwise, the rotation angle θ is 30°, and the inclination angle Ф is 25°. The reaction in the tubular reactor A spiral mixing device 4 is installed at the entrance of the section, and a spiral mixing device 2 identical to the spiral mixing device 4 is installed in front of the reactant output nozzle. There are 4 spiral guide fins, the direction of rotation is clockwise, and the rotation angle α is 10°, the inclination angle β is 15°, under the same dosage, there is no scarring, panting, vibration, and the pressure of the tubular reactor is 3-5kg / cm 2 , the pressure is stable, the reaction and injection of the tubular reactor are normal, and the noise is 50 decibels. After 30 days of use, the polytetrafluoroethylene entering the spiral mixer in the reaction section only appears yellow in color and has no cracks. The stainless stee...

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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 mixing degree, 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 ...

Claims

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Application Information

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IPC IPC(8): B01J19/26B01J10/00C05B7/00
Inventor 武四海王金铭王宝安石学勇张兵印梁红江
Owner 中国-阿拉伯化肥有限公司
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