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An integrated treatment system and method for gas-fired industrial boiler energy saving and flue gas deep purification

A technology for deep purification of flue gas and industrial boilers, which is applied in the field of air pollution control, and can solve problems such as failure to meet emission standards, insufficient stability of low-nitrogen combustion technology, general NOx removal effect, etc., and achieve low cost, no selectivity, no The effect of secondary pollution

Active Publication Date: 2019-06-11
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some technologies of low-nitrogen combustion technology are not stable enough, and the NOx removal effect is average, which can no longer meet the increasingly stringent emission standards

Method used

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  • An integrated treatment system and method for gas-fired industrial boiler energy saving and flue gas deep purification

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Utilize the method and system of the present invention to treat the flue gas of the gas-fired water boiler whose rated thermal power is 1.4MW, when the flue gas flow rate is 20m 3 / h, the flue gas temperature is 158°C, the difference between the flue gas moisture content and the air moisture content is 11.30%, and the flue gas NOx concentration is 108.50mg / m 3 , when the ambient temperature is 20°C, after the flue gas passes through the two-stage heat exchanger, the temperature, the difference between the humidity content and the air humidity content, and the NOx concentration can be reduced to 46°C, 3.23% and 65.96mg·m respectively -3 , and the removal rates were 70.89%, 71.42% and 39.21%, respectively.

Embodiment 2

[0043] Utilize the method and system of the present invention to treat the flue gas of the gas-fired water boiler whose rated thermal power is 1.4MW, when the flue gas flow rate is 12m 3 / h, the difference between the moisture content of the flue gas at the inlet of the low-temperature plasma reactor and the moisture content of the air is 3.35%, and the NOx concentration is 41.26mg / m 3 , when the plasma discharge power is 50W, the difference between the moisture content of flue gas and air and the concentration of NOx can finally be reduced to 0.29% and 10.41mg / m3 respectively 3 , and the removal rates were 91.34% and 74.77%, respectively.

Embodiment 3

[0045] Utilize the method and system of the present invention to treat the flue gas of the gas-fired water boiler whose rated thermal power is 1.4MW, when the flue gas flow rate is 10m 3 / h, the flue gas temperature is 198°C, the difference between the flue gas moisture content and the air moisture content is 12.51%, and the flue gas NOx concentration is 167.07mg / m 3 , flue gas SO 2 The concentration is 63.68mg / m 3 , when the ambient temperature is 29°C and the plasma discharge power is 30W, the flue gas temperature, the difference between the humidity content and the air humidity content, NOx and SO 2 Concentrations can be reduced to 33°C, 0.3%, 21.47mg·m -3 and 7.35 mg·m -3 , and the removal rates were 83.33%, 97.6%, 87.39% and 88.46%, respectively.

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Abstract

The invention discloses a gas industrial boiler energy saving and smoke deep purification integrated processing system and method. The system comprises a high-temperature-section heat exchanger, a low-temperature-section heat exchanger, a low-temperature plasma reactor, an alkali liquor absorption tower and a chimney, all of which are sequentially connected to a smoke outlet of a gas industrial boiler. The low-temperature plasma smoke processing technology is applied to smoke purification of the gas industrial boiler and is combined with the smoke deep condensation technology, a gas boiler energy saving and smoke deep purification integrated technology is formed, and the purposes of energy saving and emission reducing are achieved.

Description

technical field [0001] The invention relates to the technical field of air pollution control, in particular to an integrated treatment system and method for gas-fired industrial boiler energy saving and flue gas deep purification. Background technique [0002] Gas boiler basically does not produce dust, SO 2 and other pollutants, but it will produce a large amount of NOx. The nitrogen oxide emission concentration of most natural gas boilers in my country is 300mg / m 3 about. NOx is not only the main air pollutant, but also PM 2.5 important precursors. In recent years, the state and local governments have put forward higher requirements on the NOx emission concentration limits of gas-fired boilers. The NOx emission concentration limit of gas-fired boilers is 30mg m -3 . In addition, gas-fired industrial boilers have a large moisture content, and the volume share of water vapor can reach up to 28%. According to the chemical equation of natural gas combustion, every 1Nm of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23J15/02F23J15/06F22D1/00B01D53/75B01D53/73B01D53/56B01D53/96
CPCB01D53/56B01D53/73B01D53/75B01D53/96B01D2257/404B01D2258/0283B01D2259/818F22D1/003F23J15/02F23J15/06F23J2215/10F23J2215/20F23J2215/50Y02E20/30
Inventor 王云海赵景联门高闪
Owner XI AN JIAOTONG UNIV
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