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Renewable flue gas desulfuration agent and applications thereof

A technology for regenerating flue gas and desulfurizing agent, which is applied in the separation of dispersed particles, chemical instruments and methods, separation methods, etc., and can solve problems such as loss of absorption of absorbents

Active Publication Date: 2014-05-21
CHINA PETROCHEMICAL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a renewable flue gas desulfurizer to solve the problem that the absorbent in the prior art is easily oxidized to generate heat-stable salt, which makes the absorbent lose its ability to absorb SO 2 ability and other shortcomings

Method used

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  • Renewable flue gas desulfuration agent and applications thereof
  • Renewable flue gas desulfuration agent and applications thereof
  • Renewable flue gas desulfuration agent and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Composition (weight percent) of renewable flue gas desulfurizer:

[0031] β-Hydroxyethylethylenediamine: 20%

[0032] Phosphoric acid: 10%

[0033] Citric acid: 2%

[0034] Hydroquinone: 0.2%

[0035] Sodium nitrite: 0.8%

[0036] Deionized water: 67%

[0037] The experimental setup consists of four parts:

[0038] 1) Gas distribution system: The simulated flue gas is controlled by mass flowmeters of nitrogen, air, carbon dioxide, sulfur dioxide and nitric oxide to provide accurate gas flow to the system and form gases with different concentrations. The simulated flue gas is uniformly passed through the mixer and then enters the heating furnace to be heated and mixed with water vapor from another way to 200-300°C and enters the washing system.

[0039] 2) Washing system: The circulating washing water is extracted from the bottom of the washing tower, and after being measured by the flow meter, it enters the nozzle of the washing tower in two wa...

Embodiment 2

[0047] Composition (weight percent) of renewable flue gas desulfurizer:

[0048] 1,4-bis(2-hydroxyethyl)piperazine: 30%

[0049] Sulfurous acid: 18%

[0050] p-Phenylenediamine: 0.5%

[0051] Sodium Phosphate: 0.5%

[0052] Deionized water: 51%

[0053] The experimental device is the same as in Example 1, and the experimental conditions are: absorption temperature 55°C, liquid-gas ratio 0.5kg / m 3 .

[0054] The experimental results are shown in Table 2.

[0055] Table 2 Absorption effect of desulfurizer in Example 2

[0056]

[0057] Shown by the data in table 2: the renewable flue gas desulfurizer of the present invention has an effect on SO in flue gas 2 The content fluctuates between 2000~8200mg / m 3 When fluctuating, it can ensure that the desulfurization rate is above 90%, the regeneration steam consumption is low, and the steam consumption is reduced by more than 30%.

Embodiment 3

[0059] Composition (weight percent) of renewable flue gas desulfurizer:

[0060] 1,4-bis(2-hydroxypropyl)piperazine: 10%

[0061] Hydroxyethylpiperazine: 15%

[0062] Sulfuric acid: 8%

[0063] Sulfurous acid: 7%

[0064] p-Phenylenediamine: 0.5%

[0065] Sodium nitrite: 1%

[0066] Deionized water: 58.5%

[0067] The experimental device is the same as that in Example 1, and the experimental conditions: the absorption temperature is 40°C, and the liquid-gas ratio is 1kg / m 3 .

[0068] The experimental results are shown in Table 3.

[0069] Table 3 Example 3 Desulfurization agent absorption effect

[0070]

[0071] Shown by the data in table 3: the renewable flue gas desulfurizer of the present invention has an effect on SO in flue gas 2 The content is 1500~2500mg / m 3 When fluctuating, the desulfurization rate can be guaranteed to be around 96%, and as the absorption temperature decre...

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Abstract

The invention discloses a renewable flue gas desulfuration agent and applications thereof, which aim at overcoming the defects that an adsorbent in the prior art is easily oxidized to generate heat stable salt, and thus the capability of the adsorbent in absorbing SO2 is lost, and the like. The desulfurization agent comprises the following compositions in percentage by weight: (A) 5-60% of diamine compounds containing ethoxyl or hydroxypropyl; (B) 2-40% of desorption auxiliaries; (C) 0.1-0.5% of an antioxidant; (D) 0.5-1% of a corrosion inhibitor; and (E) 5-90% of deionized water. The desulfurization agent can be used in the fields of coal-fired power plants, refinery enterprises, nonferrous metallurgy enterprises and the like, is low in energy consumption, capable of being recycled and free from secondary pollution, and heat stable salts are generated slowly.

Description

technical field [0001] The invention relates to a kind of SO in flue gas 2 The removed flue gas desulfurizer particularly relates to a renewable flue gas desulfurizer and its application in coal-fired power plants, refining and chemical enterprises, non-ferrous smelting and other fields. Background technique [0002] With the increase of human demand for energy, SO formed in the process of coal burning, oil refining and non-ferrous smelting 2 Emissions are increasing day by day. SO 2 is one of the main air pollutants, SO in the atmosphere 2 Seriously endanger the living environment of human beings in the form of acid rain, effectively control SO 2 Emissions are a problem that all walks of life need to take seriously and work hard to solve. [0003] Flue gas desulfurization is currently the only large-scale commercial application of desulfurization in the world. According to the type of desulfurizer, it can be divided into dry method, semi-dry method and wet method desu...

Claims

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Application Information

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IPC IPC(8): B01D53/78B01D53/18B01D53/50
Inventor 陈卫红裴旭东郭荣群李朝恒王秀珍涂先红张凡
Owner CHINA PETROCHEMICAL CORP
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