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SCR Denitration reactor

Classification:

The SCR denitrification reactor is a device for decrease nitrogen oxide (NOx) from flue gas by selective catalytic reduction (SCR) technology to achieve high-efficient flue gas denitrification


Details Introduction


Overview 
The SCR denitrification reactor is a device for decrease nitrogen oxide (NOx) from flue gas by selective catalytic reduction (SCR) technology to achieve high-efficient flue gas denitrification . SCR technology uses a catalyst in the presence of oxygen to make the reducing agent (usually ammonia) react with NOx in the flue gas to generate harmless nitrogen and water, thus achieving the purpose of reducing NOx emissions. This technology has the advantages of no by-products, no secondary pollution, simple device structure, high removal efficiency (up to 90%), reliable operation, easy maintenance and so on.
SCR denitration reactor mainly consists of reactor body, steel support and stair platform, ash blowing system and internal flow sharing device. The cross-section of the reactor is designed according to the size of the flue gas to ensure the optimal flue gas flow rate and thus the reaction efficiency. The reactor is generally a multi-layer structure, which is divided into catalyst initial loading layer and reserved layer.

 

Working mechanism
Ammonia gas is injected into the denitration device of high temperature flue gas as denitration agent, and the NOx in the flue gas is decomposed into N2 and H2O under the action of catalyst. The reaction formula is as follows:
1) Main reaction

NO+NO2+2NH3→2N2+3H2O
4NO+4NH3+O2→4N2+6H2O
2NO2+4NH3+O2→3N2+6H2O

2) Side effects

2SO2+O2→2SO3

 

SCR Denitration reactor model description (if no special instructions, A indicates a letter, N is  number)

 

 

Gas flow 
10000~3000000m3/h, the outlet emission concentration can be as low as 5mg/Nm3

 

Applicable industry
Boiler and kiln flue gas in electric power, metallurgy, building materials, light industry, chemical industry, steel and coking industries.

 

Characteristics of SCR denitration reactor
1, ‌ high denitrification efficiency ‌ : SCR technology can achieve high efficiency of nitrogen oxide removal, denitrification efficiency can reach more than 90%, and even stable reach more than 95% ‌.
2. ‌ good stability ‌ : The design and operation process of SCR denitration equipment is relatively stable, and it can maintain efficient denitration performance for a long time. Through reasonable control parameters and optimized operation mode, the deactivation of catalyst and the failure rate of equipment can be reduced, and the reliability and service life of equipment can be improved ‌.
3. Strong adaptability :SCR denitration equipment has relatively low requirements for fuel types and combustion conditions. Whether it is coal, oil or natural gas and other fuels, as well as different combustion temperatures, pressures and other conditions, SCR technology can be used for denitration treatment. This makes SCR denitration equipment widely used in various types of industrial and energy fields.
‌ Environmental protection and no secondary pollution ‌ : SCR denitrification technology uses reducing agents to reduce NOx to non-toxic N2 and H2O, and the whole process does not form secondary pollution ‌.

 

SCR Denitration reactor technical parameters (Part)

 

Model number

Gas flow 

m3/h

Number of silos

Number of initial catalyst loading layers

Number of spare layers of catalyst

Number of catalyst module columns per layer

Number of catalyst module rows per layer

Resistance(Pa)

Remark

SCR-1-1/1-1×4

30000~90000

1

1

1

1

4

<800

 

SCR-1-1/1-2×3

40000~130000

1

1

1

2

3

<800

 

SCR-1-1/1-2×4

60000~170000

1

1

1

2

4

<800

 

SCR-1-1/1-3×4

90000~260000

1

1

1

3

4

<800

 

SCR-1-1/1-3×5

110000~330000

1

1

1

3

5

<800

 

SCR-1-2/1-1×4

30000~90000

1

2

1

1

4

<1200

 

SCR-1-2/1-1×5

35000~110000

1

2

1

1

5

<1200

 

SCR-1-2/1-2×3

40000~130000

1

2

1

2

3

<1200

 

SCR-1-2/1-2×4

60000~170000

1

2

1

2

4

<1200

 

SCR-1-2/1-2×5

70000~220000

1

2

1

2

5

<1200

 

SCR-1-2/1-3×3

65000~200000

1

2

1

3

3

<1200

 

SCR-1-2/1-3×4

90000~260000

1

2

1

3

4

<1200

 

SCR-1-2/1-3×5

110000~330000

1

2

1

3

5

<1200

 

SCR-1-2/1-3×6

130000~390000

1

2

1

3

6

<1200

 

SCR-1-2/1-4×4

115000~350000

1

2

1

4

4

<1200

 

SCR-1-2/1-4×5

150000~430000

1

2

1

4

5

<1200

 

SCR-1-2/1-4×6

170000~520000

1

2

1

4

6

<1200

 

SCR-1-2/1-4×7

200000~600000

1

2

1

4

7

<1200

 

SCR-1-3/1-4×8

230000~700000

1

3

1

4

8

<1500

 

SCR-4-2/1-1×5

110000~330000

4

2

1

1

5

<1200

Off-line regeneration


Keyword:

SCR Denitration reactor

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