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Oxygen carrier gasifying combustion method for loading oxygen and device

A technology of oxygen carrier and oxygen carrier, which is applied in combustion methods, gas fuel burners, burners, etc., and can solve the problems of high energy consumption for carbon dioxide removal, energy consumption of carbon dioxide consumption, and impact on energy utilization efficiency, etc.

Inactive Publication Date: 2008-07-09
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Conventional air direct combustion, in addition to the generation of nitrogen oxides, the removal of carbon dioxide in the flue gas consumes a lot of energy; the method of carbon dioxide separation and combustion through coal gasification also requires energy consumption for oxygen production and carbon dioxide separation
If this method is used for power generation, the energy consumed can account for more than 10% of the power consumption rate of the factory, which seriously affects the energy utilization efficiency

Method used

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  • Oxygen carrier gasifying combustion method for loading oxygen and device

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Embodiment 1

[0025] An oxygen-carrier oxygen-carrying oxidative combustion method, the low-valence metal oxide or metal element as the oxygen carrier is placed in the fluidized bed of the air reactor, and the metal oxide as the oxygen carrier is Fe 2 o 3 , FeO, Fe 3 o 4 , CuO, Cu 2 O, NiO, ZnO, the metal element as the oxygen carrier is Fe, Cu, Zn, Ni. Then, the fluidized air is introduced from the lower end C of the fluidized bed of the air reactor, and the low-valence metal oxide or metal elemental oxygen carrier reacts with the oxygen in the air to obtain the heated high-valence metal oxide, and then make it pass through two Stage separator separation; the separated high-temperature oxygen-depleted air is discharged from the upper end H of the separator, and the separated oxygen carrier passes through the return leg and enters the lower mixed gasification chamber of the fuel reactor fluidized bed; the fuel reactor flow The lower end E of the gasification bed is fed with gasification...

Embodiment 3

[0031] A method for realizing carbon dioxide separation during coal / natural coke / petroleum coke combustion by utilizing the present invention, that is, using coal / natural coke / petroleum coke for clean power generation and simultaneously realizing the separation of carbon dioxide. Referring to Fig. 2, after the air is compressed by the compressor 8, it becomes high-pressure air, enters the fluidized bed of the air reactor of Example 1, and reacts with the reduced oxygen carrier to obtain high-temperature, high-pressure, oxygen-poor air and carries oxygen through the air reactor The body separator is separated, and the high-pressure oxygen-poor air enters the turbine 7 to expand and do work, driving the generator 6 to generate electricity, and the exhaust gas from the turbine 7 enters the waste heat recovery power generation system 9 to generate electricity or steam. The oxygen carrier separated by the oxygen carrier separator of the air reactor enters the fluidized bed of the fu...

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Abstract

The invention discloses an oxygen carrying gasification combustion method with an oxygen carrier as well as relevant apparatus; the method is characterized in that the oxygen carrier is arranged inside an air reactor fluidized bed; if fluidized air is fed, oxysome reacts with oxygen in the air before high-value metal oxide is heated to obtain; then, the oxide will be separated through a two-stage separator; the high-temperature oxygen denuded air, which is separated, is exhausted out of the upper-end of the separator; the separated oxygen carrier goes through a returning dipleg to enter a mixing and gasification chamber; in a circulation fluidized bed in the air reactor, an oxygen carrying reaction happens between the oxygen carrier and oxygen in the air: The oxygen carrier from the reaction flows into the dipleg after being separated by the two-stage separator, so that the oxygen carrier and the fuel can together enter the gasification chamber below the fuel reactor fluidized bed; in the gasification chamber, a gasification reaction happens to the fuel and the water vapour, so as to create a synthetic gas. Meanwhile, the oxygen carrier releases oxygen and a reduction reaction happens with a synthetic gas or a fuel, before carbon dioxide is gained.

Description

technical field [0001] The invention relates to a method and device for separating carbon dioxide during the combustion process by using an oxygen carrier to carry out a process similar to steam gasification and pure oxygen combustion of coal / natural coke / petroleum coke, especially to an oxygen carrier Oxygen-carrying oxidation combustion method and device thereof. Background technique [0002] One of the sustainable development strategies of energy utilization is to realize the efficient and clean utilization of energy. Coal, natural coke and petroleum coke are used as energy sources. During the combustion process, reducing carbon dioxide emissions and realizing efficient and clean utilization is the future development direction. Conventional air direct combustion, in addition to the formation of nitrogen oxides, consumes a lot of energy to remove carbon dioxide from the flue gas; the method of carbon dioxide separation and combustion through coal gasification also require...

Claims

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Application Information

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IPC IPC(8): F23D14/00
Inventor 向文国
Owner SOUTHEAST UNIV
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