Gas-fired boiler system and operation method thereof

A gas-fired boiler and gas technology, which is applied in the field of boilers, can solve the problems of difficult NOx emission to meet emission standards, difficult to capture, and large amount of combustion flue gas, and achieves low flue gas amount, zero emission, and significant environmental benefits. Effect
CN105757641AActive Publication Date: 2016-07-13UNIV OF SCI & TECH BEIJING +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
UNIV OF SCI & TECH BEIJING
Publication Date
2016-07-13

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Abstract

The invention discloses a gas-fired boiler system and an operation method thereof, wherein the gas-fired boiler system comprises a first chemical chain combustion reactor and a second chemical chain combustion reactor, wherein the first chemical chain combustion reactor and the second chemical chain combustion reactor are filled with oxygen carriers; when fuel gas is introduced into either the first chemical chain combustion reactor or the second chemical chain combustion reactor for reducing the oxygen carriers, air is introduced into the other chemical chain combustion reactor for oxidizing the oxygen carriers; through switching a fuel gas pipeline and an air pipeline, the oxygen carriers in the first chemical chain combustion reactor and the second chemical chain combustion reactor are alternately oxidized and reduced; during the oxidization and reduction reaction, heat is provided for a heat supply medium. The gas-fired boiler system has high heat energy utilization rate.
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Description

technical field

[0001] The invention relates to the technical field of boilers, in particular to a gas boiler system and its operating method. Background technique

[0002] The existing problems of conventional gas-fired boilers can be summarized into four aspects. First, the energy utilization efficiency is relatively low. This is because the dew point of water vapor in the combustion flue gas is low (about 55°C), so the latent heat of water vapor generated by combustion is hardly utilized. Coupled with the large amount of combustion flue gas, resulting in a large sensible heat loss. Second, NOx emissions are difficult to meet emission standards. The higher combustion temperature and the direct mixing of gas and air lead to the generation of thermal NOx and rapid NOx. Third, the CO in the combustion flue gas 2 Difficult to catch. CO in gas flue gas 2 If the concentration is too low (about 8%), the energy consumption of the capture process is very large. The fourth is...

Claims

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