Flue gas SDS dry desulfurization + SCR low-temperature denitration technology and equipment

Applicating Company

Shandong Tiantuo Equipment Manufacturing Co., Ltd

Technology Name

Flue gas SDS dry desulfurization + SCR low-temperature denitration technology and equipment

Technical principle

Flue gas SDS dry desulfurization system cloth bag dust collector SCR low-temperature denitration system chimney discharge

Using sodium-based dry desulfurization process, sodium-based dry desulfurization uses ultrafine powder to fully mix and contact with flue gas, and quickly reacts with SO2 in flue gas under the action of catalyst and promoter.Moreover, in the reactor, flue and bag dust collector, ultra fine powder has been reacted with SO2 in the flue gas.The reaction is rapid and sufficient, and the byproduct Na2SO4 can be produced within 2 seconds. By-products are recycled through cloth bags and used as chemical products.This kind of reaction has high desulfurization efficiency. When the chemical reaction equivalent is 1:1, the desulfurization efficiency is greater than 95%, and it is once injected into the desulfurizer, requiring no circulation.

1. Desulphurization mechanism: with baking soda (NaHCO3) as desulfurization agent, activated under the action of high temperature flue gas, surface microporous structure, like popcorn burst, flue flue gas and full contact with activated desulfurization agent, SO2 and other acidic medium in the flue gas is absorbed and purified, desulfurization and dry Na2SO4 byproducts with the airflow into the bag dust collector arrest.

Main reaction: 2NaHCO3 (S) = Na2CO3 (s) + H2O (g) + CO2 (g)

SO2(g)+Na2CO3(s) +1/2O2 = Na2SO4(s)+CO2(g)

Secondary reaction: SO3 (g) + Na2CO3 (s) = Na2SO4 (s) + CO2 (g)

Scope of application

Suitable for flue gas treatment with less than 1000 mg of sulfur content.

Process flow and description

The flue gas enters the integrated sodium-based (NaHCO3) dry desulphurization (SDS) dust removal system.Sodium bicarbonate ultrafine powder is injected into the SDS desulfurization reactor. The sodium bicarbonate ultrafine powder decomposes high active sodium carbonate and carbon dioxide under the action of high-temperature flue gas. The highly active Na2CO3 is in full contact with SO2 and other acidic media in the flue gas, and is absorbed and purified.After desulfurization, the powder particle products enter the bag dust collector to collect the desulfurization by-products.It can ensure the treatment efficiency of> 95% and jointly treat chlorine and HF and other acidic gases in flue gas.

Promotion prospects

1. The flue gas dust removal, desulfurization and denitration process is mature and reliable.The materials, manufacturing process and inspection requirements used in flue gas dust removal, desulfurization and denitration, and auxiliary equipment and accessories shall not be lower than the provisions of the relevant national standards.

2. Ensure that when the dust content, sulfur dioxide and NO concentration of the flue gas fluctuate within a certain range, the dust removal, desulfurization and denitration rate meets the design requirements of the system design.When the flue gas volume changes at 40~110%, the system works normally.

3. Mature dust removal, desulfurization and denitration technology can be adopted to ensure that the treatment effect meets the requirements and standards of the system design.

4. The layout of the project site can meet the requirements of the system equipment and land use.

5. The desulfurization and denitration products will not produce secondary pollution.

6. System raw materials have a stable and reliable source.

7. The parts and equipment in contact with the corrosive media in the whole dust removal, desulfurization and denitration system have anti-corrosive measures.

8. The purchased equipment is a domestic and international famous brand.

9. The catalyst meets the requirements of flue gas ash, and selects scientific and reasonable technical parameters.

10. Process design saves energy and water resources as much as possible. Energy-saving technology and equipment should be designed to reduce the investment and operation cost of the system as much as possible.

11. The environmental noise in the device area meets the Class II standard of GB12348-1990 Factory Noise Standard for Industrial Enterprises, and the operation noise of the equipment is less than 85 decibels (measured at 1 meter away from the equipment).

12. The modular design concept meets the environmental protection requirements of different periods.