Gas stripping precipitated calcium carbonate carbonation reactor

A technology of precipitated calcium carbonate and reactor, applied in the direction of calcium carbonate/strontium/barium, etc., can solve the problems of difficult control of the carbonation reaction process, low product quality, high cost, etc., and achieve simple design, prolonged residence time, and improved The effect of utilization

Active Publication Date: 2014-07-02
GUANGXI HUANA NEW MATERIALS TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] In summary, because of the common bubbling carbonation reactor and the air-lift carbonation reactor disclosed in Chinese utility model patent CN03273383 without forced mass transfer device, it is used to prepare precipitated calcium carbonate, and the carbonation reaction process is difficult to control, resulting in Product quality is not high
However, high-gravity synthesizers, emulsification reactors, tubular reactors, membrane reaction synthesizers, emulsification cycle carbonation reactors and other reactors are difficult to be widely used due to the shortcomings of complex design and high cost.

Method used

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  • Gas stripping precipitated calcium carbonate carbonation reactor
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Examples

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Embodiment 1

[0038] like figure 1, an air-lifting precipitated calcium carbonate carbonation reactor, mainly composed of an air-lifting guide tube 5, a reactor shell 6, a baffle plate 7 and a lower gas distributor 8; a baffle is set in the middle of the cylindrical air-lifting guide tube 5 Plate 7, lower gas distributor 8 and upper gas distributor 13 are respectively arranged at the upper and lower ends of the gas lift guide tube, the gas distributors 8 and 13 are sieve plates with evenly distributed small holes, and 16 gas lift guide tubes are arranged on the air lift guide tube 5 The cylinder support rod 12 is fixed in the middle of the reactor shell 6; the cylindrical reactor shell 6 and the bottom of the arc-shaped reactor at the lower end are provided with jackets, and the upper and lower ends of the jacket of the cylindrical reactor shell 6 are respectively provided with water outlets. Valve 3 and water inlet valve 11 are the inlet valve, and an overflow valve 4 communicating with th...

Embodiment 2

[0041] like figure 2 , an air-lifting precipitated calcium carbonate carbonation reactor, mainly composed of an air-lifting guide tube 5, a reactor shell 6, a baffle plate 7 and a lower gas distributor 8; a baffle is set in the middle of the cylindrical air-lifting guide tube 5 Plate 7, the lower end of the air-lift guide cylinder is provided with a lower gas distributor 8 with evenly distributed small holes, and the air-lift guide cylinder 5 is provided with 12 air-lift guide cylinder support rods 12 fixed in the middle of the reactor shell 6; the cylindrical reactor shell Body 6 and the bottom of the arc-shaped reactor at the lower end are provided with a jacket, and the upper and lower ends of the jacket of the cylindrical reactor shell 6 are respectively provided with a water outlet valve 3 and an inlet valve 11. An overflow valve 4 communicating with the inside of the reactor is set at any position on the periphery of the reactor between the upper ports of the cylinder 5...

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Abstract

The invention provides a gas stripping precipitated calcium carbonate carbonation reactor, comprising a gas stripping guiding cylinder, a reactor housing, a baffle plate and a lower gas distributor. A sieve plate lower gas distributor and an upper gas distributor, which have uniformly distributed small apertures are arranged in the cylindrical gas stripping guiding cylinder; baffle plates are arranged in the middle of the gas stripping guiding cylinder; more than eight gas stripping guiding cylinder supporting rods are fixed in the middle of the reactor housing; an inlet valve is arranged on a connecting pipe of a reactor discharge valve; and a manhole and a gas top cover are arranged at an upper port of the reactor housing. The reactor has simple design and low cost; the gas distributor can fragment and disperse reaction gas and increase mass transfer efficiency; a reaction mixture forms a circulation inside and outside the gas stripping guiding cylinder; the baffle plate prolongs a stay time of carbon dioxide-containing gas in a reaction system, so as to increase utilization rate of carbon dioxide, effectively shorten carbonic acid reaction time and produce precipitated calcium carbonate with uniform quality and stability. Therefore, the invention has good economic benefits.

Description

technical field [0001] The invention relates to chemical equipment, in particular to an air-lift type precipitated calcium carbonate carbonation reactor. technical background [0002] Calcium carbonate is a white, non-toxic filler that is widely available. High-purity precipitated calcium carbonate with suitable particle size and shape can be obtained by adjusting the production process. Precipitated calcium carbonate is widely used in the fields of plastics, papermaking, rubber, viscose, coatings and inks. It not only plays the role of incremental filling and reduces processing costs, but also can perform functional modification on filling objects. Especially nano-calcium carbonate, because of its smaller particle size, higher specific surface area and special surface treatment, has superior properties that cannot be compared with ordinary calcium carbonate. Nano-calcium carbonate can endow soft PVC with excellent processing performance, mechanical properties and product ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F11/18
Inventor 朱勇王权广黄炜民黄炜波黄安定
Owner GUANGXI HUANA NEW MATERIALS TECH CO LTD
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