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Production technology of 'zero-carbon emission' cement combined with industrial gypsum waste treatment

A technology for industrial waste gypsum and industrial gypsum, which is applied in the fields of waste treatment and utilization and environmental protection, can solve the problems of occupying land resources, high economic benefits, low process costs, etc., and achieves low process costs, high economic benefits, and reduced CO2 emissions. amount of effect

Inactive Publication Date: 2014-03-19
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

[0008] The main problem to be solved by the present invention is how to process and utilize industrial gypsum waste in an efficient, energy-saving and environment-friendly manner, solve the problems of easy ash formation under natural conditions, occupy land resources, and pollute groundwater, and at the same time reduce CO2 in the cement industry. 2 emissions to mitigate global warming
This process can effectively solve the problem of stacking pollution of industrial gypsum waste, and is compatible with CO in cement kiln exhaust gas 2 Combined with capture, the process cost is low and the economic benefit is high

Method used

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  • Production technology of 'zero-carbon emission' cement combined with industrial gypsum waste treatment

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Embodiment Construction

[0024] Attached below figure 1 The present invention is described in detail.

[0025] refer to figure 1 , this embodiment includes the following systems: industrial gypsum waste carbonation treatment system, obtained calcium carbonate molding processing system, calcium cycle CO 2 Capture systems, cement production systems. The gypsum waste from the industrial production process is fully mixed with a certain amount of water and ammonia solution in the slurry tank 1, and is transported to the carbonation tank 3 through the material pump 2 for carbonation with part of the desulfurized cement kiln tail gas. reaction, the main component obtained is CaCO 3 The solid product mixed with an appropriate amount of cement is sent to the particle forming machine 5 for molding processing, and the upper solution in the carbonation tank 3 is sent to the crystallization tank 4, and the ammonium sulfate obtained by crystallization can be used as agricultural fertilizer, and the excess ammoni...

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Abstract

The invention relates to a production technology of 'zero-carbon emission' cement combined with industrial gypsum waste treatment, and mainly comprises the following steps: carbonizing industrial waste gypsum; moulding and processing the obtained calcium carbonate, and the moulded calcium carbonate particles can be used as adsorbent for capturing CO2 in the cement kiln tail gas in circulation; the inactivated calcium adsorbent can sinter cement clinker. The invention not only can solve the treatment problem of industrial gypsum waste for changing waste into valuable and reasonably using resource; but also can substantially reduce CO2 discharged in the cement production process, thereby according with national low carbon policy.

Description

technical field [0001] The invention relates to a method of using calcium carbonate obtained from carbonation treatment of industrial gypsum waste as an adsorbent to cyclically capture CO in cement kiln tail gas 2 The invention provides a method for burning cement clinker with deactivated calcium adsorbent, which belongs to the field of waste treatment and utilization and environmental protection. Background technique [0002] As the problem of global warming becomes more and more serious, people gradually realize that it is mainly caused by human activities in the form of CO 2 As a result of massive emissions of greenhouse gases, reducing global CO 2 Emissions are looming, and the impact on CO 2 Research on capture and storage technology (CCS) has become a hot topic. According to the statistical report of the International Energy Agency, in 2012 the world had 31.6 billion tons of CO 2 emitted into the atmosphere, while my country is the global CO 2 The largest emitter,...

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Application Information

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IPC IPC(8): C04B7/43
CPCY02P40/121Y02P40/18
Inventor 刘文强孙健徐明厚
Owner HUAZHONG UNIV OF SCI & TECH
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