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 absorbe

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

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Example Embodiment

[0059] Example 1

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

[0061] At a temperature of 25℃, take 25.7% of the surfactant Span 60 and 25.7% of the co-surfactant n-butanol, mix well, add 15.6% diesel in proportion, mix well, and finally add 33% dimethyl methylene in proportion Sulfone, stir while adding until the solution becomes clear and homogeneous liquid, that is, a stable oily denitration absorption liquid is formed, which can be left standing for a long time without layering. Take 15% of the oily absorbent and the remainder is ammonia to prepare the absorbent.

[006...

Example Embodiment

[0063] Example 2

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

[0065] Under the temperature condition of 25℃, take 28% surfactant Tween and 29% co-surfactant isoamyl alcohol, mix well, add 10% silicone oil in proportion, mix well, and finally add 33% dimethyl sulfoxide in proportion , While adding and stirring until the solution becomes clear and homogeneous liquid, that is, a stable oily denitration absorption liquid is formed, which can be left standing for a long time without layering. Take 20% of the oily absorbent and the remainder is ammonia to prepare the absorbent....

Example Embodiment

[0067] Example 3

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

[0069] Under the temperature condition of 25℃, take 23.4% surfactant TX-10 and 12.5% ​​co-surfactant isobutanol, mix well, add 26.8% diesel according to the proportion, mix well, and finally add 37.3% dimethyl methylene in proportion Sulfone, stir while adding until the solution becomes clear and homogeneous liquid, that is, a stable oily denitration absorption liquid is formed, which can be left standing for a long time without layering. Take 40% of the oily absorbent and the remainder is ammonia to prepare th...

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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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