Oxygen-enriched combustion boiler system and operation method thereof

An oxygen-enriched combustion and boiler technology, applied in the field of boilers, can solve problems such as aggravated corrosion of flue air ducts, and achieve the effects of increasing combustion stability, preventing acid corrosion, and being easy to achieve.

Active Publication Date: 2014-07-30
DONGFANG BOILER GROUP OF DONGFANG ELECTRIC CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the following problems appeared in the oxygen-enriched combustion operation test: first, the NOx concentration in the flue gas...

Method used

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  • Oxygen-enriched combustion boiler system and operation method thereof
  • Oxygen-enriched combustion boiler system and operation method thereof

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Embodiment

[0036] Such as figure 1 , figure 2 As shown, the oxygen-enriched combustion boiler system of the present invention includes a furnace 1, a burner 2, an overfired air nozzle 3, an economizer 4 located in the tail flue 20, a preheater 6, a dust collector 34 and a chimney 35, and the tail A denitrification device 5 is connected between the outlet of the flue 20 and the exothermic flue gas inlet of the preheater 6, and the exothermic flue gas from the exothermic flue gas outlet of the preheater 6 passes through the dust collector 7 and the flue gas heat exchanger 9 Inlet connection, the exothermic flue gas outlet of the flue gas heat exchanger 9 is connected to the desulfurization device 10 and the flue gas cooler 12 in sequence, and then connected back to the heat-absorbing flue gas inlet of the flue gas heat exchanger 9, and the flue gas cooler 12 Both ends are connected in parallel with a flue gas cooler closing branch with a flue gas cooling control valve 13, a front shut-of...

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Abstract

The invention discloses an oxygen-enriched combustion boiler system and an operation method thereof. The oxygen-enriched combustion boiler system is capable of meeting the emission standard and retarding device corrosion. A denitration device is arranged between a tail part flue of the oxygen-enriched combustion boiler system and a preheater; a heat radiation smoke outlet of the preheater is connected with a heat radiation smoke inlet of a smoke heat exchanger through a dust remover; a heat radiation smoke outlet of the smoke heat exchanger is connected with a desulfurization device and a smoke cooler in sequence and is then returned to a heat absorption smoke inlet of the smoke heat exchanger; a part of the primary air of a combustor is fed into the combustor through a primary air oxygen injector after passing through the preheater and the rest part of the primary air of the combustor is used for pulverizing; the secondary air of the combustor enters the preheater through a secondary air oxygen injector and then is fed into the combustor. The operation method of the oxygen-enriched combustion boiler system emphatically controls the content of water vapor in recycling smoke and the circulation ratio of the recycling smoke and independently adjusts the oxygen injection ratios and amounts of the primary air and the secondary air. The oxygen-enriched combustion boiler system is environment-friendly and easy to implement, and has both oxygen injection safety and economy performances.

Description

technical field [0001] The invention relates to a boiler, in particular to an oxygen-enriched combustion boiler system and its operating method. Background technique [0002] Carbon dioxide is generally considered to be one of the important causes of global warming due to its greenhouse effect. Fossil energy use is the most important CO 2 Sources of emissions. If the global greenhouse gas emissions are counted by industry, the power generation industry is the largest source of emissions, and coal-fired power generation is the largest source of CO2 emissions in the power generation industry. 2 The largest source of emissions, oxyfuel combustion is a CO 2 emissions reduction solutions. [0003] The oxygen-enriched combustion method is based on the existing power plant boiler system, replacing the conventional combustion-supporting air with a gas containing high concentration of oxygen, and at the same time recirculating the flue gas to obtain CO with a volume concentration ...

Claims

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Application Information

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IPC IPC(8): F23C9/06F23J15/02F23K3/02F23L1/00F23L9/00
CPCY02E20/34
Inventor 毛宇陈灿曾洁胡修奎霍锁善
Owner DONGFANG BOILER GROUP OF DONGFANG ELECTRIC CORP
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