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Regenerable oily denitration absorption liquid used for absorbing nitric oxides in smoke as well as preparation method and application of absorption liquid

A technology of nitrogen oxides and absorption liquid, which is applied in the field of renewable oil-based denitrification absorption liquid and its preparation, can solve the problems of being unable to recycle and reuse, and achieve the effects of low overall operating cost, convenient source, and high removal efficiency

Inactive Publication Date: 2014-12-10
ZHEJIANG TIANLAN ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these absorbents cannot be recycled

Method used

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  • Regenerable oily denitration absorption liquid used for absorbing nitric oxides in smoke as well as preparation method and application of absorption liquid
  • Regenerable oily denitration absorption liquid used for absorbing nitric oxides in smoke as well as preparation method and application of absorption liquid
  • Regenerable oily denitration absorption liquid used for absorbing nitric oxides in smoke as well as preparation method and application of absorption liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] The total flue gas volume of a 35t / h biomass boiler is 50,000 to 60,000 m 3 / h, measured flue gas SO before purification 2 The concentration is 600~750mg / m 3 ;NO x The concentration is 350~550mg / m 3 . The absorption tower is a spray tower with a height of 15m, a diameter of 3m, and a gas residence time of >4s. During the absorption process, control the reaction temperature of the absorption liquid to be about 50°C and the pH to be 6-7.

[0061] Under the temperature condition of 25°C, take 25.7% surfactant Span 60 and 25.7% co-surfactant n-butanol, mix well, add 15.6% diesel oil in proportion, mix well, and finally add 33% dimethyl methylene Sulfone, stir while adding until the solution becomes a clear and uniform liquid, that is, a stable oily denitrification absorption solution is formed, which can stand for a long time without stratification. Take 15% of the oily absorbing liquid, and the rest is ammonia water, and prepare the absorbing liquid.

[0062] During...

Embodiment 2

[0064] The total flue gas volume of a 35t / h biomass boiler is 50,000 to 60,000 m 3 / h, measured flue gas SO before purification 2 The concentration is 600~750mg / m 3 ;NO x The concentration is 350~550mg / m 3 . The absorption tower is a spray tower with a height of 15m, a diameter of 3m, and a gas residence time of >4s. During the absorption process, control the reaction temperature of the absorption liquid to be about 50°C and the pH to be 6-7.

[0065] Under the temperature condition of 25°C, take 28% surfactant Tween and 29% co-surfactant isoamyl alcohol, mix well, add 10% silicone oil in proportion, mix well, and finally add 33% DMSO in proportion , Stir while adding until the solution turns into a clear and uniform liquid, that is, a stable oily denitrification absorption solution is formed, which can stand for a long time without stratification. Take 20% of the oily absorbing liquid, and the rest is ammonia water, and prepare the absorbing liquid.

[0066] During the...

Embodiment 3

[0068] The total flue gas volume of a 35t / h biomass boiler is 50,000 to 60,000 m 3 / h, measured flue gas SO before purification 2 The concentration is 600~750mg / m 3 ;NO x The concentration is 350~550mg / m 3 . The absorption tower is a spray tower with a height of 15m, a diameter of 3m, and a gas residence time of >4s. During the absorption process, control the reaction temperature of the absorption liquid to be about 50°C and the pH to be 6-7.

[0069] At 25°C, take 23.4% surfactant TX-10 and 12.5% ​​co-surfactant isobutanol, mix well, add 26.8% diesel oil in proportion, mix well, and finally add 37.3% dimethyl methylene Sulfone, stir while adding until the solution becomes a clear and uniform liquid, that is, a stable oily denitrification absorption solution is formed, which can stand for a long time without stratification. Take 40% of the oily absorbing liquid, and the rest is ammonia water to prepare the absorbing liquid.

[0070] During the production process, the pr...

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Abstract

The invention discloses regenerable oily denitration absorption liquid used for absorbing nitric oxides in smoke as well as a preparation method and application of the absorption liquid. The regenerable oily denitration absorption liquid is prepared from the following components in percentage by volume: 5%-30% of an oil phase, 25%-40% of a water phase and 30%-60% of an emulsifier. The preparation method of the regenerable oily denitration absorption liquid comprises the following steps: taking a surfactant and a co-surfactant according to a ratio at the temperature of 15 DEG C-50 DEG C, uniformly mixing, sequentially adding the oil phase and the water phase according to the ratio, and stirring a solution until the solution is clear. The absorption liquid has a good effect of removing pollutants; the removal rate of nitric oxides can reach over 60%; the absorption liquid can be regenerated and recycled, so that the catalyst can be cyclically used; meanwhile, the absorption liquid is stable in property, simple in process and low in investment and operation costs, and can be implemented on existing wet desulphurization equipment.

Description

technical field [0001] The invention belongs to the technical field of air pollution control, and in particular relates to a renewable oil-based denitrification absorption liquid capable of removing nitrogen oxides in flue gas, a preparation method and application thereof. Background technique [0002] Contains SO 2 and NO x The large amount of waste gas discharge has caused serious environmental pollution problems, such as acid rain, the destruction of the ozone layer and so on. In the research of flue gas denitrification technology, Selective Catalytic Reduction (SCR) and Non-Selective Catalytic Reduction (SNCR) have been industrialized on a certain scale. However, these two technologies have disadvantages such as high investment and operating costs, easy catalyst failure, narrow operating temperature range, and easy to cause secondary pollution. [0003] Simultaneous flue gas desulfurization and denitrification technology is a hot technology that has been researched an...

Claims

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Application Information

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IPC IPC(8): B01D53/79B01D53/56B01D53/50B01D53/96C01C1/18
CPCY02P20/584
Inventor 梁平王岳军莫建松寿冬金
Owner ZHEJIANG TIANLAN ENVIRONMENTAL PROTECTION TECH
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