SNCR technology, namely selective non-catalytic reduction technology, is one of the main flue gas denitrification technologies at present. In the narrow temperature range of 850~1100℃ in the furnace, without the action of catalyst, urea as a reducing agent can selectively reduce NOx in the flue gas, and basically does not react with O2 in the flue gas.
Different reducing agents have different reaction temperature ranges, which are called temperature windows. The reaction temperature range of NH3 is 850~1100℃. When the reaction temperature is too high, the decomposition of ammonia will reduce the NOx reduction rate. On the other hand, when the reaction temperature is too low, the escape of ammonia will increase, which will also reduce the NOx reduction rate. The key to the SNCR process technology is that the reducing agent injection system must spray the reducing agent into the effective temperature window area in the furnace as much as possible, that is, it is possible to ensure that the injected reducing agent is well mixed with the flue gas at a suitable temperature, which can improve the utilization rate of the reducing agent on the one hand, and control the ammonia escape on the other hand.
Compared with SCR technology, SNCR technology does not have the expensive denitration catalyst used by SCR technology. Its technical advantage lies in low investment and operating costs and low SO2/SO3 conversion rate. The disadvantage of SNCR is that the denitration efficiency is relatively low. Usually, the SNCR denitration efficiency of large boilers is below 40%.
The flow field analysis technology used by SNCR technology determines the boundary conditions of key parameters according to the different operating conditions of various furnace types. After detailed CFD simulation and CKM calculation, accurate process design plans and layouts are formulated.
Design experts have rich experience in SNCR engineering design and can provide targeted solutions and professional services to users. The new type of ejector is used to combine the needs of process design to achieve the purpose of improving denitration efficiency.

★Technical features

Use safe urea reducing agent, no liquid or solid waste; The equipment adopts modular structure, easy installation, short construction period;
The space occupied is very small, and the boiler SNCR injection area can be arranged entirely on the boiler platform;
The injection is multi-level and automatically controlled with load and operating instructions; It is not sensitive to changes in coal types;
Applicable: coal, oil, natural gas, cement kilns, garbage furnaces, etc.; NOx removal efficiency is 25~50%, and some furnace types can be higher; Low investment and low operating cost; Suitable for units with low denitration efficiency requirements, especially for unit denitration modification projects;
When the unit emission requirements are high, it has the means to combine with LNB+OFA and SCR technology.

★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.