SCR-Denitration device_Ecosail Energy Technology Jiangsu Co., LTD

Technology is introduced：

Definition: Selective catalytic reduction technology (SCR) is a treatment process for NOx in diesel vehicle exhaust emissions, that is, under the action of catalyst, spray reducing agent ammonia or urea, reduce NOx in the tail gas into N2 and H2O.

Process principle：

After the exhaust gas comes out from the turbine, it enters into the exhaust mixing pipe. A urea measuring injection device is installed on the mixing pipe, and the urea water solution is sprayed into the pipe. After the hydrolysis and pyrolysis reaction of urea at high temperature, NH3 is generated. In general, the consumption of 100L of fuel oil will consume 5L of liquid urea solution.

SCR-Denitration device(图1)

Ecosail-s series internal combustion engine emission control product line is widely applicable to generator sets and engine test benches; Diesel engine/gas electromechanical plant; Landfill gas, kitchen waste landfill gas power plant; Distributed energy stations; Marine diesel engines and so on.

Techunical advwantage：

Ecosail-s series has rich experience in denitrification system integration with advanced denitrification catalyst research and development and production technology

High temperature denitrification catalyst for distributed energy

• Extremely wide operating temperature :160-600℃

• Low NOx emission concentration :20mg/Nm³

• Meet the stringent emission requirements of Euro 6

• Efficient system integration and Internet of Things technology

As a clean and efficient use of natural gas, the distributed energy system of natural gas is also an effective measure to improve air quality. However, the energy system is generally installed near the users, so the emission of pollutants has become the focus of attention of the users. Because natural gas is cleaner and has a lower sulfur content, sulfur dioxide and dust are often discharged under the standard. Nitrogen oxides (NOX), mainly of thermal type, are the primary controlled pollutants. Distributed energy flue gas of natural gas has the characteristics of high direct exhaust temperature (450~550℃) and low exhaust temperature (<200℃) after energy cascade utilization, which limits the application of traditional vanadium titan-based denitrification catalyst. Zeolite catalyst has the characteristics of wide reactivity temperature window and stable high temperature performance, so it has become the choice of distributed energy denitration system.

Our company has three production technologies and products of the following three catalysts:

System composition：

1. Catalyst
The catalyst body is also the core part of the system. Our company adopts ferri-based molecular sieve catalyst, which is a high temperature catalyst, stable and reliable. When the tail gas temperature is 450-550 ℃, the catalytic reaction effect is ideal. Above 95% denitrification efficiency can be achieved.
2. Hydraulic system
It includes urea metering pump, urea nozzle and other components. The main function of this part is to provide power for THE SCR system so that urea solution can be quantitatively and uniformly sprayed into the pipeline.
3. Control part
It mainly includes the central control unit, each sensor, display part and so on. According to the NOx emission concentration of the original diesel engine, the central control unit demarcates the amount of urea to be injected under different power conditions. Make a map. According to the NOx sensor input data and map image comparison, the injection volume of urea can be controlled.
4. Auxiliary components
It includes urea solution storage tank, by-pass pipe and other parts.
SCR tail gas denitrification purification system for generator sets can be customized designed and produced to meet emission standards set according to manufacturers' requirements. Can do new model form a complete set, or old model transformation is practical. Especially suitable for gas generator power station, biogas generator power station exhaust emission purification and other applications.

System composition：

1. Urea pump

Adjustable ratio up to 1:30, higher than traditional

The metering pump is about 30 times higher;

· High measurement accuracy;

· Smooth output, continuous high precision measurement;

· Automatic flow adjustment;

· Integrated flow measurement.

2. Vegetable spray nozzle

Atomized particles are very fine. Average diameter is 40-60 microns, ensuring 100% evaporation;

· Adjustable ratio up to 10:1.

· Good anti-clogging performance and low gas consumption;

· Life span up to 3-5 years.

3. Urea tank

Equipped with stirring and electric heating function, can accelerate the dissolution of urea;

Constant temperature electric heating function, to avoid the storage of urea solution due to the low ambient temperature, urea precipitation crystallization blockage pipeline;

4. Other system components

SCR reactor

Urea injection control cabinet;

Measuring tank;

Exhaust temperature sensor;

NOx sensor;

Urea spray gun;

Urea solution preparation system;

Storage tanks;

Air compressor;

By-pass system

SCR-Denitration device

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