A split-flow flue gas desulfurization and denitrification treatment system and method

Abstract

The invention discloses a split-flow flue gas desulfurization and denitrification treatment system and method. The split-flow flue gas desulfurization and denitrification treatment system includes an activated carbon adsorption tower, an activated carbon analysis tower, an air mixing chamber, a hot blast furnace and an SCR reactor; The air mixing chamber mixes the hot air generated by the fuel combustion of the hot blast furnace and the part of the desulfurized flue gas after the desulfurization treatment of the activated carbon adsorption tower to form a heat medium, which is used to realize the thermal regeneration and heating of the activated carbon in the heating section of the activated carbon desorption tower The SCR system requires denitrification flue gas. The system and method of the invention have low input cost, simple structure, strong adaptability and practicability, high control precision, and obvious flue gas desulfurization and denitrification effects.

Description

technical field

[0001] The invention relates to flue gas desulfurization and denitrification technology, in particular to a split-flow flue gas desulfurization and denitrification treatment system and method, belonging to the technical field of flue gas purification. Background technique

[0002] For industrial flue gas, especially for sintering machine flue gas in the iron and steel industry, flue gas desulfurization and denitrification technology is a flue gas purification technology applied to the chemical industry where multiple nitrogen oxides and sulfur oxides are generated. Nitrogen oxides and sulfur oxides are one of the main sources of air pollution. Most of flue gas simultaneous desulfurization and denitrification technologies are currently in the research and industrial demonstration stage, but because it can simultaneously achieve desulfurization and denitrification in one system, especially with the X Control standards are becoming increasingly stringent, and d...

Examples

Embodiment 1

[0110] Such as figure 1 As shown, a split-flow flue gas desulfurization and denitrification treatment system includes an activated carbon adsorption tower 1, an activated carbon desorption tower 2, a hot blast stove 4, an air mixing chamber 3 and an SCR reactor 7. According to the direction of flue gas, one side of the activated carbon adsorption tower 1 is provided with a raw flue gas inlet 101 , and the other side is provided with a desulfurized flue gas outlet 102 . The desulfurized flue gas outlet 102 is connected to the air inlet of the SCR reactor 7 through the first pipeline L1. The clean flue gas discharged from the SCR reactor 7 is discharged from the exhaust port of the SCR reactor 7 . A bypass pipe is drawn from the first pipeline L1 to form the air mixing chamber 3, the air inlet of the air mixing chamber 3 is connected to the upstream position of the first pipeline L1, and the exhaust port of the air mixing chamber 3 is connected to at the downstream position of...

Embodiment 2

[0113] Example 1 was repeated except that the system also included a GGH heat exchanger 5 . The gas outlet of the SCR reactor 7 is connected with the exhaust pipe 6 . The GGH heat exchanger 5 is connected to the first pipe L1 and the exhaust pipe 6 respectively. The flue gas desulfurized by the activated carbon adsorption tower 1 is sent to the air inlet of the SCR reactor 7 after heat exchange by the GGH heat exchanger 5 . The clean flue gas discharged from the SCR reactor 7 is discharged through the exhaust pipe 6 after being heat-exchanged by the GGH heat exchanger 5 . The position where the air inlet of the air mixing chamber 3 leads from the first pipeline L1 is located downstream of the connection position between the GGH heat exchanger 5 and the first pipeline L1.

Embodiment 3

[0115] Repeat embodiment 2, according to the trend of activated carbon, the activated carbon outlet of described activated carbon desorption tower 2 is connected with the activated carbon inlet of activated carbon adsorption tower 1 by the first activated carbon conveying device L6. The activated carbon outlet of the activated carbon adsorption tower 1 is connected with the activated carbon inlet of the activated carbon desorption tower 2 through the second activated carbon delivery device L5.

technical field

[0001] The invention relates to flue gas desulfurization and denitrification technology, in particular to a split-flow flue gas desulfurization and denitrification treatment system and method, belonging to the technical field of flue gas purification. Background technique

[0002] For industrial flue gas, especially for sintering machine flue gas in the iron and steel industry, flue gas desulfurization and denitrification technology is a flue gas purification technology applied to the chemical industry where multiple nitrogen oxides and sulfur oxides are generated. Nitrogen oxides and sulfur oxides are one of the main sources of air pollution. Most of flue gas simultaneous desulfurization and denitrification technologies are currently in the research and industrial demonstration stage, but because it can simultaneously achieve desulfurization and denitrification in one system, especially with the X Control standards are becoming increasingly stringent, and d...

Examples

Embodiment 1

[0110] Such as figure 1 As shown, a split-flow flue gas desulfurization and denitrification treatment system includes an activated carbon adsorption tower 1, an activated carbon desorption tower 2, a hot blast stove 4, an air mixing chamber 3 and an SCR reactor 7. According to the direction of flue gas, one side of the activated carbon adsorption tower 1 is provided with a raw flue gas inlet 101 , and the other side is provided with a desulfurized flue gas outlet 102 . The desulfurized flue gas outlet 102 is connected to the air inlet of the SCR reactor 7 through the first pipeline L1. The clean flue gas discharged from the SCR reactor 7 is discharged from the exhaust port of the SCR reactor 7 . A bypass pipe is drawn from the first pipeline L1 to form the air mixing chamber 3, the air inlet of the air mixing chamber 3 is connected to the upstream position of the first pipeline L1, and the exhaust port of the air mixing chamber 3 is connected to at the downstream position of...

Embodiment 2

[0113] Example 1 was repeated except that the system also included a GGH heat exchanger 5 . The gas outlet of the SCR reactor 7 is connected with the exhaust pipe 6 . The GGH heat exchanger 5 is connected to the first pipe L1 and the exhaust pipe 6 respectively. The flue gas desulfurized by the activated carbon adsorption tower 1 is sent to the air inlet of the SCR reactor 7 after heat exchange by the GGH heat exchanger 5 . The clean flue gas discharged from the SCR reactor 7 is discharged through the exhaust pipe 6 after being heat-exchanged by the GGH heat exchanger 5 . The position where the air inlet of the air mixing chamber 3 leads from the first pipeline L1 is located downstream of the connection position between the GGH heat exchanger 5 and the first pipeline L1.

Embodiment 3

[0115] Repeat embodiment 2, according to the trend of activated carbon, the activated carbon outlet of described activated carbon desorption tower 2 is connected with the activated carbon inlet of activated carbon adsorption tower 1 by the first activated carbon conveying device L6. The activated carbon outlet of the activated carbon adsorption tower 1 is connected with the activated carbon inlet of the activated carbon desorption tower 2 through the second activated carbon delivery device L5.

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