SCR denitrification (Selective Catalytic Reduction) is a mainstream flue gas denitrification technology. By injecting a reducing agent (such as ammonia water, urea), the nitrogen oxides (NOₓ) in the flue gas are reduced to harmless nitrogen (N₂) and water (H₂O) under the action of a catalyst, thereby achieving deep denitrification. It is widely used in thermal power, steel, cement, glass, chemical, waste incineration and other industries.
★Product features of SCR denitrification system
High efficiency denitrification capacity
Denitrification efficiency can reach 80% to 95%, meeting national and industry ultra-low emission standards (NOₓ≤50mg/Nm³, even up to 30mg/Nm³).
Moderate reaction temperature
Usually react at a flue gas temperature of 300 to 420℃ (the high dust zone is arranged before the air preheater, and the low dust zone is arranged after it);
Applicable to high temperature, high dust and high flow rate flue gas environment.
Catalyst diversification
Common catalysts include V₂O₅-TiO₂-WO₃ series, and honeycomb, plate, corrugated and other structures can also be used;
The catalyst has good anti-poisoning, anti-abrasion, strong thermal stability and other characteristics.
High degree of automation
Equipped with ammonia/urea delivery control system, ammonia mixer, catalyst temperature control system, etc., to achieve fully automatic and precise ammonia injection;
Support DCS/PLC system integrated control.
Strong matching with desulfurization/dust removal system
Can be flexibly configured before and after the dust collector and desulfurization tower to meet different industrial working conditions and layout requirements;
Can form a combined denitrification (Hybrid SNCR-SCR) with the SNCR system.
★Advantages of SCR denitrification
Category Advantages
High denitrification efficiency is the most mature and efficient NOₓ treatment technology in the current industrial field, especially suitable for ultra-low emission projects
Strong environmental compliance, can meet the national and local emission standards of NOₓ concentration ≤50mg/Nm³ for a long time, suitable for environmental protection acceptance
Mature and reliable technology, mature process, stable catalyst performance, has been widely used in power, cement, steel and other industries, rich engineering experience
The system operates stably, has high control accuracy, high degree of automation, controllable ammonia escape (generally ≤5ppm), and the catalyst life can reach 2 to 3 years
Strong scalability, can be coordinated with other environmental protection processes such as desulfurization, dust removal, low nitrogen combustion, etc., to achieve an integrated environmental protection treatment system
★Applicable industries and typical application scenarios
Coal-fired power plants (host flue gas denitrification)
Waste incineration power plants (medium and low temperature SCR or tail gas deep denitrification)
Cement industry (kiln tail flue gas denitrification)
Iron and steel metallurgy (sintering machine, blast furnace hot blast furnace, heating furnace)
Glass manufacturing, fertilizer chemical industry, ceramics, papermaking and other industries with high NOₓ emissions
★Potential challenges (design and operation should pay attention to)
Project description
Catalyst poisoning risk Arsenic, phosphorus, sulfuric acid mist in flue gas may cause catalyst deactivation
Ammonia escape control requirements are high Excessive ammonia injection will cause ammonia escape, resulting in secondary pollution or ammonium sulfate blockage
High system investment Compared with SNCR, SCR has higher initial construction and operating costs, but more stable efficiency
Strict temperature control If the flue gas temperature deviates from the design value (too high or too low), it may lead to a decrease in reaction efficiency

★Company Introduction

Yancheng Hongcheng Chaoyu Environmental Protection Co., Ltd. is a national high-tech enterprise specializing in the research and development, production, sales, installation, commissioning and service of environmental protection and energy-saving equipment such as atmospheric environment treatment, waste gas treatment and sewage treatment. It is a well-known domestic manufacturer, system integrator and general contractor of dust removal, desulfurization and denitrification, ultra-low emission, waste gas treatment and sewage treatment equipment. The various types of dust removal equipment, desulfurization and denitrification equipment, sewage treatment and other environmental protection and energy-saving equipment produced by the company are advanced in technology and reliable in quality. They are widely used in thermal power, coking, garbage power generation, chemical industry, papermaking, steel, metallurgy, carbon, glass, cement building materials and other industries. The products are sold to more than 20 provinces and cities across the country and have been widely praised by customers.

★Factory Appearance

★FAQ

Q. How high is the dust removal efficiency of bag filters?
A. The dust removal efficiency can generally reach more than 99%, and can effectively filter fine dust above 0.3 microns.

Q. Can bag filter handle high temperature gas?
A. It can handle high temperature gas up to about 250℃. It needs to use high temperature resistant filter material and control the temperature and humidity of the gas.

Q. How to extend the service life of bag filter?
A. Choose appropriate filter material, clean dust on time, avoid high temperature shock and dust blockage, and perform regular inspection and maintenance.