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A Cu/Ca-based Compound Combined Cycle Capture of Co 2 method and device

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

Active Publication Date: 2017-09-26
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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  • A Cu/Ca-based Compound Combined Cycle Capture of Co <sub>2</sub> method and device
  • A Cu/Ca-based Compound Combined Cycle Capture of Co <sub>2</sub> method and device

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Effect test

Embodiment 1

[0025] A Cu / Ca-based compound combined cycle capture of CO 2 method, such as figure 1 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 the fluidized bed fuel reactor, at 900-950°C, CO 2 The reaction is carried out under the condition of fluidized medium.

[0027] Carbon-based solid fuels can be carbon-based fuels such as coal, petroleum coke, and biomass, and the chemical formula is C n h m o x ; The calcium-based absorbent is CaCO 3 or CaCO 3 Natural minerals or wastes as the main component; the 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 inert carrier; the fluidized bed fuel reactor is a cycle Fluidized bed fuel reactor or bubbling fluidized bed fuel reactor.

[0028] The following reactions mainly occur in the fluidized bed fuel reactor: CaCO 3 →CaO+CO 2 ...

Embodiment 2

[0034] CO capture using the aforementioned Cu / Ca-based compound combined cycle 2device, including a fluidized bed fuel reactor, a fluidized bed air reactor, a first cyclone separator, a second cyclone separator, a first sealed return valve, a second sealed return valve, a circulating fan, a compressor Purification device; the first sealed return valve and the second sealed return valve are sealed return valves for one-way control of return, and the connection relationship of the device is: the upper end outlet of the fluidized bed fuel reactor and the first cyclone The separator is connected, the upper outlet of the first cyclone separator is connected with the circulating fan and the compression purification device respectively, the feeding pipe of the first cyclone separator is connected with the first sealed return valve; the return section of the first sealed return valve It is connected with the dense phase area of ​​the fluidized bed air reactor; the upper outlet of the ...

Embodiment 3

[0036] CO capture using the aforementioned Cu / Ca-based compound combined cycle 2 devices 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. Circulating fan, compression purification device; the first sealed return valve 6 and the second sealed return valve 3 are sealed return valves for two-way control of return, and the connection relationship of the devices is: fluidized bed fuel reactor The upper end outlet of 5 is connected with the first cyclone separator 4, the upper end outlet of the first cyclone separator 4 is connected with the circulating fan and the compression purification device respectively, the feeding pipe of the first cyclone separator 4 and the first sealing return valve 6 connected; the return sections on both sides of the first sealed return valve 6 are respectively connected to t...

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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 interdisciplinary technical field of energy and environmental protection, in particular to a Cu / Ca-based compound combined cycle capture of CO 2 method and device. Background technique [0002] Chemical looping combustion is a CO-based 2 New combustion technology with zero emission concept. From the perspective of combustion mode, chemical looping combustion is different from traditional combustion mode, in that the fuel does not directly contact with 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 , without consuming excess energy. The chemical looping combustion system mainly includes air reactor, fuel reactor and oxygen carrier. Among them, the oxygen carrier is the carrier of oxygen transfer and the key link connecting the two reactors. In the fuel reactor, the oxygen carr...

Claims

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Application Information

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Patent Type & Authority Patents(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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