Calcium oxide and calcium hydroxide preparation methods and calcination device for preparation of calcium oxide

Calcium oxide and calcination technology, which is applied in the field of calcination equipment for preparing calcium oxide, calcium oxide, and calcium hydroxide preparation methods, can solve problems such as energy consumption that is not considered, and achieve the effects of reducing energy consumption for calcination and improving heat utilization

Inactive Publication Date: 2018-03-02
深圳市天橙宝投资发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But in fact, in the process of calcining calcium carbonate, high temperature higher than 900°C is not always required. Therefore, the scheme of calcining calcium carbonate in the prior art only takes into account the adequacy of the reaction, and does not take into account the energy consumption. The problem is inconsistent with the "energy saving and emission reduction" policy advocated by the country. Therefore, it is necessary to propose a new calcium oxide preparation plan to reduce the energy consumption of calcination on the basis of sufficient calcination.

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  • Calcium oxide and calcium hydroxide preparation methods and calcination device for preparation of calcium oxide
  • Calcium oxide and calcium hydroxide preparation methods and calcination device for preparation of calcium oxide
  • Calcium oxide and calcium hydroxide preparation methods and calcination device for preparation of calcium oxide

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Embodiment 1

[0042] In order to solve the problem in the prior art that only a single calcination temperature is provided when calcining calcium carbonate, which leads to serious waste of heat in some calcination stages that do not need this temperature, this embodiment provides a new calcium oxide preparation scheme, The preparation method of calcium oxide and the calcining equipment for preparing calcium oxide will be introduced below. see first figure 1 A schematic cross-sectional view of the shown calcining equipment:

[0043] Calcination equipment 1 comprises equipment body 11, and there is hollow chamber inside this equipment body 11, and this chamber is exactly calcining chamber 12, and is provided with feed inlet 13 on equipment body 11, and feed inlet 13 communicates with equipment body 11 exterior and The calcining chamber 12 is used for transporting the raw material to be calcined from the outside of the equipment body 11 to the calcining chamber 12 . The raw material to be ca...

Embodiment 2

[0065] In order to make the advantages and details of the calcium oxide preparation method more clear, this embodiment will continue to introduce the process and required equipment for the preparation of calcium oxide, please refer to Figure 4 :

[0066] The calcining equipment 4 provided in this embodiment includes a device body 41, a calcining chamber 42, a feed inlet 43, a heating device 44, and a control device 45, but it is different from the calcining device in the embodiment in that the calcining device in this embodiment There is more than one heating device, and these heating devices 44 can provide suitable calcining temperatures to the calcium source to be calcined in the calcining chamber 42 at different calcining stages. It can be understood that the heating devices corresponding to each calcination stage can be completely different, but two or more calcination stages can share the same heating device.

[0067] It is assumed that in an example of this embodiment,...

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Abstract

The embodiment of the invention provides calcium oxide and calcium hydroxide preparation methods and a calcination device for preparation of calcium oxide; a calcium source is added into a calcinationchamber in the calcination device via a feed port of the calcination device; a heating device of the calcination device is used for three-or-more-section continuous segmented calcination on the calcium source in the calcination chamber to obtain calcium oxide. Because the calcination device of the embodiment performs three-or-more-section periodic calcination on the calcium carbonate-rich calciumsource according to actual demand of calcining calcium carbonate to transform into calcium oxide, the corresponding calcination temperatures are provided for the calcium source according to the calcination stages, and a heat demand rule for calcium carbonate calcination preparation of calcium oxide is met. Therefore, calcium carbonate is guaranteed to be fully calcined, calcium oxide with relatively high yield and purity is prepared, the heat provided by the heating device can be guaranteed to be fully utilized and basically not be wasted, the utilization rate of the heat is increased and theenergy consumption of calcination is reduced.

Description

technical field [0001] The invention relates to the field of calcium hydroxide preparation, in particular to calcium oxide, a method for preparing calcium hydroxide, and calcining equipment for preparing calcium oxide. Background technique [0002] Calcium oxide CaO, commonly known as quicklime or lime, is widely used in chemical, construction and other industries. For example, calcium oxide can be used as vegetable oil decolorizer, drug carrier, desiccant, soil improver, cement accelerator, etc. Since calcium oxide and water can undergo the following exothermic reaction, calcium hydroxide is produced: [0003] CaO+H 2 O=Ca(OH) 2 ; [0004] Therefore, calcium oxide is also an important raw material for preparing calcium hydroxide, and calcium hydroxide is widely used in the fields of scientific research and development, industrial production, pharmaceutical production and food production, and has a large demand, so the preparation of calcium oxide has also been valued. T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B2/10C04B2/04
CPCC04B2/04C04B2/10
Inventor 魏毅
Owner 深圳市天橙宝投资发展有限公司
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