Device and method for preparing nanometer calcium carbonate through micropore pipe

A technology of nano-calcium carbonate and microporous tubes, applied in the direction of calcium carbonate/strontium/barium, nanotechnology for materials and surface science, nanotechnology, etc., can solve the problem of no distribution, high power consumption, complicated cleaning process, etc. problem, to achieve the effect of uniform gas-liquid mixing, enhanced penetration ability, and enhanced dispersion degree

Active Publication Date: 2016-04-20
广东星燃石化设计院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its disadvantages are: the process technology is complicated, the power consumption is high, the output is low, and it belongs to batch production
The utilization rate of carbon dioxide is low, and the cleaning process is complicated
[0011] The patent document with the patent application number 201210442581.5 discloses that a suspension of calcium hydroxide is atomized through the nozzle of a specially manufactured Venturi tube reactor, and the adsorption kiln gas and atomized calcium hydroxide droplets are carbonized, but the carbon dioxide The gas has not been distributed, resulting in insufficient mixing of carbon dioxide gas and calcium hydroxide suspension, which affects the quality of the generated nano-calcium carbonate, and because the kiln gas is automatically absorbed, the amount and flow rate of the kiln gas are difficult to control , resulting in difficulty in controlling the generation precision of nano-calcium carbonate, and the generation rate is not ideal

Method used

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  • Device and method for preparing nanometer calcium carbonate through micropore pipe
  • Device and method for preparing nanometer calcium carbonate through micropore pipe

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Such as figure 1 Shown, a kind of device that utilizes microporous tube to prepare nano-calcium carbonate of the present embodiment comprises microporous tube 2, air inlet pipe 1 and liquid storage tank 5, strong pump 6, powerful pump 6, Venturi tube 3, reaction tube 4, described Venturi tube 3 is made up of inlet section 31, constriction section 32, throat 33, diffusion section 34 connected in sequence, the liquid outlet of described liquid storage tank 5 is connected with powerful pump 6 connected to the liquid inlet, the liquid outlet of the powerful pump 6 is connected to the inlet section 31 of the Venturi tube 3, the diffusion section 34 of the Venturi tube 3 is connected to the liquid inlet of the reaction tube 4, and the reaction tube The liquid outlet of 4 links to each other with the liquid inlet of liquid storage tank 5, and described microporous pipe 2 is provided with air vent, air inlet wall and air outlet wall, and described air vent connects air inlet wa...

Embodiment 2

[0063] Such as figure 1 As shown, the difference between the device for preparing nano-calcium carbonate using microporous tubes in this embodiment and Example 1 is that the pore diameter of the microporous tubes 2 is 20 μm.

[0064] The present embodiment utilizes microporous tube to prepare the method for nano-calcium carbonate, comprises the steps: (1) enter liquid: the calcium hydroxide suspension liquid of liquid storage tank 5 is delivered to the entrance of Venturi tube 3 under the effect of powerful pump 6 Section 31, wherein the Baume concentration of calcium hydroxide slurry is 10 ° Be ', and flow velocity is 88L / min; (2) mixing: carbon dioxide gas is passed in the inlet pipe 1, and carbon dioxide gas passes through the pipe wall of microporous pipe 2 Carbon dioxide microbubbles are formed, mixed with the calcium hydroxide suspension liquid flowing through the throat 33 of the Venturi tube 3 at high speed to form a gas-liquid mixed foam, wherein the gas pressure volu...

Embodiment 3

[0067] Such as figure 1 As shown, the difference between the device for preparing nano-calcium carbonate using microporous tubes in this embodiment and Example 1 is that the pore diameter of the microporous tubes 2 is 60 μm.

[0068]The present embodiment utilizes microporous tube to prepare the method for nano-calcium carbonate, comprises the steps: (1) enter liquid: the calcium hydroxide suspension liquid of liquid storage tank 5 is delivered to the entrance of Venturi tube 3 under the effect of powerful pump 6 Section 31, wherein the Baume concentration of the calcium hydroxide slurry is 6 ° Be ', and the flow rate is 30L / min; (2) mixing: carbon dioxide gas is passed into the intake pipe 1, and the carbon dioxide gas passes through the pipe wall of the microporous pipe 2 Carbon dioxide microbubbles are formed, mixed with the calcium hydroxide suspension liquid flowing through the throat 33 of the Venturi tube 3 at high speed to form a gas-liquid mixed foam, wherein the volu...

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Abstract

The invention relates to the technical field of nanometer material preparation, and discloses a method and device for generating nanometer calcium carbonate particles by generating nano-scale carbon dioxide bubbles through a micropore pipe, making the carbon dioxide bubbles rapidly mixed and react with calcium hydroxide suspension under pressure through a Venturi jet pipeline reactor. In the flowing direction of the calcium hydroxide suspension, the device is sequentially provided with a liquid storage tank, a powerful pump, a Venturi tube, the micropore pipe, a reaction pipe and the like. In the throat part of the Venturi tube, compressed carbon dioxide gas penetrates through the pipe wall of the micropore pipe to be mixed with the calcium hydroxide suspension passing at a high speed to form foam high in gas content, a series of carbon dioxide adsorption and dissolution and acid-base neutralization reactions (commonly known as carburizing reactions) are continuously conducted in the reaction pipe and the liquid storage tank, and then nanometer calcium carbonate particles are generated. The carburizing reaction rate and the carbon dioxide utilization rate are high, and generated nanometer calcium carbonate is excellent in quality.

Description

technical field [0001] The invention relates to the technical field of preparation of nanometer materials, in particular to a device and method for preparing nanometer calcium carbonate by using microporous tubes. Background technique [0002] In the production process of nano-calcium carbonate, one of the key processes affecting product quality is the carbonization process. Carbonization is a controlling process that determines the morphology and particle size of calcium carbonate crystals. At present, the process flow of various nano-calcium carbonate production technologies in my country is basically the same, and the fundamental difference lies in the carbonization process and its equipment. According to different carbonization processes, the production methods of nano-calcium carbonate in my country can be roughly divided into the following categories: traditional low-temperature intermittent bubbling method, continuous spray carbonization method, reactor carbonization...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F11/18B82Y30/00
CPCB82Y30/00C01F11/181C01P2004/64
Inventor 秦贯丰廖力奋
Owner 广东星燃石化设计院有限公司
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