Method and device for fixing CO2 in stack gas by solid castoff carbonatation

A solid waste and carbonation technology, which is applied in chemical instruments and methods, separation methods, and chemical separation, can solve problems such as high cost and application limitations, and achieve improved mass transfer and absorption rates, increased reaction rates, and improved solid waste. The effect of carbon capacity

Inactive Publication Date: 2008-07-16
SOUTHEAST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Harsh carbonation reaction conditions and the need for CO 2 Absorption, separation, compression, transportation and other steps lead to c...

Method used

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  • Method and device for fixing CO2 in stack gas by solid castoff carbonatation

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Put the steel slag and the gray water from the power plant into the solid waste leaching tank 16 according to the gray-water ratio of 1:10, stir and leach for 1 hour, and filter to obtain Ca-enriched 2+ Leachate, Ca 2+ The concentration is 0.2mol / L; the prepared Ca-rich 2+ After the leaching solution is measured by the circulating pump 14 and the flow meter 15, it is sprayed into the metal mesh packing layer 3 loaded with carbonic anhydrase by the liquid distributor 9, containing 12% CO 2 The simulated flue gas enters the rotating packed bed reactor 1 through the inlet 6, and is enriched with Ca 2+ The leaching solution cross-flow contacts in the rotating packed bed reactor and undergoes carbonation reaction, and the carbonate product after the reaction enters the CaCO 3 Recovery system, CO removal 2 The final simulated flue gas leaves the rotating packed bed reactor 1 through the exhaust port 5 .

[0021] The rotor speed of the rotating packed bed is 1200rpm, the c...

Embodiment 2

[0024] The solid waste used in the experiment is high-calcium fly ash, and all the other are the same as in Example 1; CO 2 The removal rate is 57%, Ca2 + The conversion rate is 64%, and the obtained carbonate product is analyzed by XRD, and the main component is CaCO 3 , accounting for more than 90%.

Embodiment 3

[0026] Ca-enriched 2+ , Mg 2+ The natural salt water of the leaching agent is made, and all the other are the same as embodiment 1; CO 2 The removal rate is 69%, Ca2 + The conversion rate is 58%, and the obtained carbonate product is mainly CaCO through XRD analysis 3 and a small amount of MgCO 3 .

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Abstract

The invention provides a technique method for integrating coupling in-situ CO2 through utilizing a plurality of processes such as CO2 absorbing separation, carbonation fixation and solid wastes recovery in stack gas and a device thereof. A supergravity rotating packing bed reactor is used for intensifying transmission and multi-phase reacting process through utilizing powerful centrifugal force generated by the high-speed rotary packing bed, which is a breakthrough technology and can strengthen order of magnitude to the transmitting process of liquidoid-controlled CO2, etc., thus greatly improving mass transfer absorption rate of the CO2.

Description

1. Technical field [0001] The invention belongs to the technology for fixing carbon dioxide in flue gas, in particular to a carbonation of solid waste to fix CO in flue gas 2 method and device thereof. 2. Background technology [0002] Existing technology: CO 2 It is one of the most important greenhouse gases that cause global climate change, in which a large amount of fossil energy combustion is the cause of CO in the atmosphere 2 The main reason for the increase in concentration. Greenhouse gas CO 2 The control of carbon dioxide has attracted widespread attention from the international community, mainly including three aspects: separation and recovery, immobilization and transformation. The immobilization technologies mainly include geological immobilization, ocean storage, biological carbon sequestration, 2 Mineral carbonation fixation, etc. CO 2 Mineral carbonation fixation is imitated in nature wollastonite CaSiO 3 , olivine Mg 2 SiO 4 , Serpentine Mg 3 Si 2 ...

Claims

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Application Information

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IPC IPC(8): B01D53/62
CPCY02C10/04Y02A50/20Y02C20/40
Inventor 杨林军
Owner SOUTHEAST UNIV
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