Method and device for capturing CO2 through Cu/Ca-based compound combined cycle

A combined cycle and compound technology, applied in the direction of combustion methods, fuels burned in molten state, fluidized bed combustion equipment, etc., can solve the problems of reducing SO emissions and achieve the effect of simplifying the flue gas purification process and reducing emissions

Active Publication Date: 2014-09-24
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the invention is to provide a Cu / Ca based compound combined cycle capture CO 2 method to solve the shortcomings of traditional carbon-based solid fuel chemical looping combustion and realize CO 2 The complete capture of the fuel reactor and desulfurization in the furnace to reduce SO 2 emissions

Method used

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  • Method and device for capturing CO2 through Cu/Ca-based compound combined cycle
  • Method and device for capturing CO2 through Cu/Ca-based compound combined cycle
  • Method and device for capturing CO2 through Cu/Ca-based compound combined cycle

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Embodiment 1

[0025] A Cu / Ca-based compound combined cycle capture CO 2 Method such as figure 1 As shown, including the following steps:

[0026] Step 1. Add the mixture of carbon-based solid fuel, calcium-based absorbent, and copper-based oxygen carrier into a fluidized bed fuel reactor, and set it at 900~950℃, CO 2 The reaction is carried out under the condition of a fluidized medium.

[0027] The carbon-based solid fuel can be coal, petroleum coke, biomass and other carbon-based fuels, and the chemical formula is C n H m O x ; Calcium-based absorbent is CaCO 3 Or as CaCO 3 As the main component of natural minerals or waste; copper-based oxygen carrier is CuO, natural ore with CuO as the main component, or a mixture of natural ore with CuO as the main component and an inert carrier; fluidized bed fuel reactor for circulation Fluidized bed fuel reactor or bubbling fluidized bed fuel reactor.

[0028] The fluidized bed fuel reactor mainly produces the following reactions: CaCO 3 →CaO+CO 2 , SO p...

Embodiment 2

[0034] Using the above Cu / Ca based compound combined cycle to capture CO 2 The device includes fluidized bed fuel reactor, fluidized bed air reactor, first cyclone separator, second cyclone separator, first sealed return valve, second sealed return valve, circulating fan, compression Purification device; the first sealed return valve and the second sealed return valve are one-way sealed return valves that control the return, and the connection relationship of the devices is: the upper outlet of the fluidized bed fuel reactor and the first cyclone The separator is connected, the upper outlet of the first cyclone separator is respectively connected with the circulating fan and the compression purification device, the discharge pipe of the first cyclone separator is connected with the first sealed return valve; the return section of the first sealed return valve Connected with the dense phase zone of the fluidized bed air reactor; the upper outlet of the fluidized bed air reactor i...

Embodiment 3

[0036] Using the above Cu / Ca based compound combined cycle to capture CO 2 Device such as figure 2 As shown, it includes a fluidized bed fuel reactor 5, a fluidized bed air reactor 1, a first cyclone separator 4, a second cyclone separator 2, a first sealed return valve 6, and a second sealed return valve 3. Circulation fan, compression and purification device; the first sealed return valve 6 and the second sealed return valve 3 are two-way sealed return valve that controls the return, and the connection relationship of the devices is: fluidized bed fuel reactor The upper outlet of 5 is connected to the first cyclone separator 4, the upper outlet of the first cyclone separator 4 is connected to the circulating fan and the compression purification device respectively, the discharge pipe of the first cyclone separator 4 and the first sealed return valve 6 Connected; the return sections on both sides of the first sealed return valve 6 are respectively connected with the dense pha...

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Abstract

The invention discloses a method for capturing CO2 through Cu / Ca-based compound combined cycle. The method comprises the following steps: adding carbon-based solid fuel, a calcium-based absorbent and a copper-based oxygen carrier into a fuel reactor, and reacting by taking CO2 as a fluidizing agent at the temperature of 900-950 DEG C; separating the reaction mixture, allowing one part of the reaction gas mixture to enter the fuel reactor to serve as a fluidizing agent through a circulating fan, and allowing the residual part to pass through a compressed purification device to capture CO2; allowing the reaction solid mixture to enter an air reactor, and reacting by taking air as a fluidizing agent at the temperature of 650-700 DEG C; and separating the reaction mixture, discharging the reaction gas mixture into atmosphere, and allowing the reaction solid mixture to enter the fuel reactor to continue a circular reaction. The invention also discloses a device utilizing the method. According to the method, complete CO2 capture in a carbon-based solid fuel chemical looping combustion mode is realized, the discharge amount of greenhouse gas is reduced, and in-furnace desulfurization of the fuel reactor is realized.

Description

Technical field [0001] The invention relates to the cross-technology field of energy and environmental protection, in particular to a Cu / Ca based compound combined cycle to capture CO 2 Method and device. Background technique [0002] Chemical chain combustion is based on CO 2 New combustion technology with zero emission concept. From the perspective of combustion methods, chemical chain combustion is different from traditional combustion methods, in that the fuel does not directly contact the oxygen in the air, but the oxygen transfer and fuel combustion reaction are realized between the two reactors through the oxygen carrier. A combustion method can separate high purity CO 2 , And does not consume excess energy. The chemical chain combustion system mainly includes air reactor, fuel reactor and oxygen carrier. The oxygen carrier is the carrier for oxygen transfer and the key link connecting the two reactors. In the fuel reactor, the oxygen carrier undergoes a reduction react...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23C10/00F23C10/18
CPCY02E20/34
Inventor 段伦博段元强陈惠超赵长遂
Owner SOUTHEAST UNIV
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