Device and method for removing CO2 from power plant flue gas by utilizing non-dehydrated flue gas desulfurization gypsum

A desulfurized gypsum, non-dehydrated technology, applied in chemical instruments and methods, separation methods, gas treatment, etc., to achieve the effects of avoiding waste of resources, improving production efficiency, and reducing equipment corrosion

Inactive Publication Date: 2017-07-07
NANJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the use of waste gypsum liquid from wet desulfurization process to remove CO from flue gas 2 The device method rarely sees relevant patent reports

Method used

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  • Device and method for removing CO2 from power plant flue gas by utilizing non-dehydrated flue gas desulfurization gypsum

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Embodiment 1

[0041] Such as figure 1 As shown, an undehydrated desulfurized gypsum is used to remove CO from power plant flue gas 2 The device comprises a high-gravity rotary packed bed 1, a first reactor 4 and a second reactor 7; the input end of the high-gravity rotary packed bed 1 is fed with desulfurized gypsum, ammonia water and CO containing 2 The power plant flue gas, the output end is connected to the first reactor; the input end of the first reactor 4 is fed into the slurry for preparing desulfurizing agent, and the output end is connected to the second reactor; the input end of the second reactor 7 It is connected with the ammonia station of the power plant, and the output end is connected with the high-gravity rotating packed bed.

[0042] More specifically, a first hydrocyclone 2 and a first vacuum belt 3 are also provided between the high-gravity rotating packed bed 1 and the first reactor 4, and the output end of the high-gravity rotating packed bed 1 is connected to the fir...

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Abstract

The invention provides a device and a method for removing CO2 from a power plant flue gas by utilizing non-dehydrated flue gas desulfurization gypsum. The device comprises a super-gravity rotary packed bed, a first reaction kettle and a second reaction kettle, wherein flue gas desulfurization gypsum, ammonium hydroxide and CO2-containing power plant exhaust gas are fed from an input end of the super-gravity rotary packed bed; the first reaction kettle is connected with an output end of the super-gravity rotary packed bed; slurry for preparing a desulfurizing agent is fed from the input end of the first reaction kettle; the output end of the first reaction kettle is connected with the second reaction kettle; the input end of the second reaction kettle is connected with an ammonia station of the power plant; and the output end of the second reaction kettle is connected with the super-gravity rotary packed bed. According to the method provided by the invention, the waste product (non-dehydrated flue gas desulfurization gypsum) generated from a wet desulphurization process is utilized to effectively collect CO2 in the exhaust gas, the available resources of the coal-fired power plant are fully utilized so that the reaction materials and conditions required by the running of the system can be supplied, the use efficiency of the system energy can be effectively increased, the cost can be saved and the energy consumption can be reduced.

Description

technical field [0001] The invention relates to the field of pollutant prevention and control in the utilization of solid waste resources and energy utilization, in particular to a method for removing CO in power plant flue gas by using undehydrated desulfurized gypsum 2 The device and method belong to the technical field of carbon dioxide emission reduction. Background technique [0002] With the increasing impact of the greenhouse effect on the world's climate, CO 2 The issue of emissions has become one of the most public concerns. Currently, CO 2 The rate of emissions is growing rapidly along with the growth of human demand for energy utilization. According to the prediction of the Intergovernmental Panel on Climate Change (IPCC), the equivalent CO produced by human activities 2 It will increase from 27.1 billion t / a in 1997 to 95 billion t / a in 2100. And the CO in the atmosphere 2 The concentration will also increase from the current 400ppm to 1150ppm in 2100. How...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/96B01D53/83B01D53/62
CPCB01D53/62B01D53/83B01D53/96B01D2251/2065B01D2251/404B01D2251/506B01D2258/0283Y02A50/20Y02C20/40
Inventor 朱琳李蔚玲郭亚飞赵传文
Owner NANJING NORMAL UNIVERSITY
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