SNCR flue gas denitrification technology

Microsoft Yahei Flue Gas Denitrification Technology
Microsoft Yahei Selective Non-Catalytic Reduction Technology
Microsoft Yahei
The selective non-catalytic reduction method does not use a catalyst, in the temperature range of ~℃ Restoration method. The most commonly used pharmaceuticals are ammonia and urea. Generally speaking, the denitrification efficiency can reach ~ for large coal-fired units and can reach ~ for small units. Since this method is greatly affected by the size of the boiler structure, it is often used as a supplementary treatment method for low-nitrogen combustion technology. Its project cost is low, its layout is simple, and it occupies a small area. It is suitable for the renovation of old plants and can be used in new plants according to the boiler design.

Microsoft Yahei Selective Catalytic Reduction Technology
Microsoft Yahei
Microsoft Yahei is currently the most mature flue gas denitrification technology. Microsoft Yahei is a post-furnace denitrification technology. Method, Microsoft Yahei was first developed by
Japan
In the Microsoft Yahei century ~ Microsoft Yahei completed commercial operation in the late 1990s. Microsoft Yahei uses the reducing agent Microsoft Yahei urea) Microsoft Yahei acts on the metal catalyst Under this condition, Microsoft Yahei reacts selectively with Microsoft Yahei to form Microsoft Yahei and Microsoft Yahei. Microsoft Yahei is not oxidized by Microsoft Yahei, so Microsoft Yahei is called Microsoft Yahei Selective Microsoft Yahei. The popular Microsoft Yahei process in the world is mainly divided into ammonia method Microsoft Yahei and urea method Microsoft Yahei. This method of Microsoft Yahei uses the reducing function of ammonia to Microsoft Yahei. Under the action of catalyst, Microsoft Yahei reduces Microsoft Yahei (mainly Microsoft Yahei) into Microsoft Yahei and water which have little impact on the atmosphere. , Microsoft Yahei reducing agent is Microsoft Yahei.

Most of the catalysts used in Microsoft Yahei use Microsoft Yahei as the carrier, Microsoft Yahei or Microsoft Yahei or Microsoft Yahei as the active ingredient, and are made into honeycomb type, plate type or corrugated type. type. Microsoft Yahei catalysts used in flue gas denitration can be divided into high temperature catalysts (℃ Microsoft Yahei ~ ℃ Microsoft Yahei), medium temperature catalysts (℃ Microsoft Yahei ~ ℃ Microsoft Yahei) and low temperature catalysts (℃ Microsoft Yahei ~ ℃ Microsoft Yahei Different catalysts have different suitable reaction temperatures. If the reaction temperature is too low, the activity of the catalyst will decrease, resulting in a decrease in denitrification efficiency, and if the catalyst continues to operate at low temperatures, the catalyst will be permanently damaged. If the reaction temperature is too high , Microsoft Yahei is easily oxidized, and the increased production of Microsoft Yahei will also cause a phase change in the catalyst material, which will degrade the activity of the catalyst. Most Microsoft Yahei systems at home and abroad use
high temperature
, reaction temperature The range is ℃ Microsoft Yahei ~ ℃ Microsoft Yahei.

Advantages This method has high denitration efficiency and relatively low price. It is widely used in domestic and foreign projects and has become the mainstream technology for power station flue gas denitration.
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Disadvantages: Fuel contains sulfur, and a certain amount of Yahei can be generated during the combustion process of Yahei. After adding a catalyst, the amount of Yahei produced increases significantly under aerobic conditions. Microsoft Yahei and excessive Microsoft Yahei will generate Microsoft Yahei. Microsoft Yahei is corrosive and sticky, and Microsoft Yahei can cause damage to the tail flue equipment. Although the amount of Microsoft Yahei generated is limited, Microsoft Yahei will cause The impact cannot be underestimated. In addition, the
catalyst poisoning
phenomenon cannot be ignored either.

Microsoft Yahei