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Exhaust Air Purification

Writer:Time:2021-01-06

AOSIF dry exhaust gas purifier

The purifier product uses (DPF) as the filter carrier, which can trap PM black smoke particles in the exhaust gas.

1.DPF: Diesel engine wall flow particle trap adopts DPF ceramic carrier filter element, DPF (short for Diesel Particulate Filter)

1.1 Diesel engine wall flow particle trap is a new product that can effectively remove black smoke particles from diesel engine exhaust.


2. DPF filtering workflow:

DPF uses the porous partitions between the alternately blocked honeycomb channels to trap PM black smoke microparticulates in diesel exhaust. 

diesel engineThe black smoke containing carbon particles discharged during 

operation enters the engine exhaust DPF particle trap through a special pipe, and passes through it.

The densely arranged filters adsorb soot particles on the ceramic filter. 

Diesel engine exhaust particle trap adopts DPF ceramic carrier,

The filter-type ceramic body is composed of many small parallel pores; these parallel pores are separated by air-permeable pore walls, one end

Open, one end is blocked, the micropores in the filter hole wall can let the exhaust gas discharge

from the diesel engine run through, and the black smoke particles are due to the particle size ratio

It is larger and cannot pass through the micropores, 

and is filtered on the surface of the ceramic pore wall to achieve the effect of eliminating black smoke. 

Diesel engine runs for a period of time Afterwards, the intercepted carbon particles need to be cleaned up regularly.


3. Product performance:

DPF has a strong ability to trap carbon smoke ultra-fine nanoparticles, as well as high heat resistance, good thermal conductivity, low exhaust resistance,

High filtration efficiency, strong pressure resistance and so on. Reduce the power loss and fuel consumption of diesel engine.

The cleaning rate of PM2.5 particles can reach 90-99%. The original emission light absorption coefficient ≤1,61m-1, plus Aosif particle capture

After concentrator, the absorption coefficient of exhaust light ≤0.5m-1, in line with the national environmental protection requirements.


4. The regeneration reaction equation of the principle of DPF particle catcher is shown in Figure 1:

Pic.1 DPF heating regeneration reaction equation

 

1

 NO 2+Soot(C)       CO2+NO

 

2

Soot (C)+O2      CO2

Soot:Refers to combustible organic black smoke particles, or toner: C

 

3

NO+O2           NO 2


5. AOSIF particle trap: regeneration principle, regeneration method and regeneration conditions

5.1 Principle of regeneration: When the black smoke particles captured by the DPF carrier accumulate to a certain extent, the exhaust back pressure of the DPF is relatively large, which can be Affecting the increase in power output and fuel consumption of diesel engines, it is necessary to effectively regenerate the intercepted carbon particles through effective methods.In order to achieve the effect of repeated use of DPF.

5.2 Regeneration method: Back-blowing (heating) regeneration, using DPF or CDPF, requires external regeneration conditions.

5.3 Regeneration conditions: back-blowing (heating) regeneration conditions: after reaching the set back pressure alarm, it needs to be disassembled for regeneration maintenance.

5.4 Regeneration process: During the entire working process of the diesel engine, the exhaust gas temperature is lower than 250 degrees, or the load is small each time it starts.For machines below 25%, it is recommended to use back-blowing heating for regeneration. When the diesel engine exhaust back pressure continues to exceed 15Kpa, it needs to be disassembled Come down for thorough cleaning and maintenance. The DPF regeneration temperature is between 600-730 degrees, and the soot particles collected in the DPF are at a reasonable temperature Direct oxidation and combustion, so that the DPF's ability to trap soot particles can be restored and can be reused.

5.5 Maintenance cycle: According to the original smoke exhaust value of the internal combustion engine and the working conditions, the maintenance cycle time is also different. Normal conditions After the back pressure reaches 15kpa, the DPF needs to be disassembled for a thorough cleaning and maintenance. After thorough maintenance or regeneration, it can be N Repeated use many times, the filtration performance is the same as the new product.


6 Requirements for the original condition of the diesel engine:

6.1 It is recommended that the smoke value measured by the opacity smoke meter under the free acceleration of actual work of the diesel engine is not more than 1.61m-1.

6.2 Diesel engines that match the particle trap have various performance indicators and components, such as cylinder pressure, fuel injection timing, uniform operation of each cylinder, good fuel pump and fuel injector plunger pressure and atomization, normal speed regulation, and oil The consumption is normal, the air filter is clean, and the exhaust pipe is connected without smoke leakage.

6.3 If the smoke value of the original diesel engine is ≥1.61m-1, the diesel engine needs to be overhauled, the fuel pump needs to be adjusted, the fuel injection nozzle needs to be changed, the valve need to be adjusted or replaced, etc. to reduce the emission of the diesel engine. Users need to arrange the maintenance unit for maintenance. Excessive smoke levels of diesel engines will easily cause carrier blockage.

6.4 If the original diesel engine exhausts blue smoke, it means that the engine is burning oil and the diesel vehicle engine needs to be repaired. Please arrange for the diesel engine maintenance unit to inspect or replace the cylinder liner, piston ring, valve, valve seat, valve guide, and turbocharger. Maintainer need to take the turbocharger assembly or repair kit. The diesel engine burns oil easily to cause DPF blockage.


7. Product performance and meeting standards

7.1 Filter material: ceramic carrier is used.

7.2 Connection mode: flange connection is adopted, which is convenient for disassembly and maintenance.

7.3 Product filtration efficiency: the treatment efficiency of soot particles PM (black smoke) is ≥95%.

7.4 Meet the national standard: GB36886-2018 "Exhaust Smoke Length and Measurement Method of Non-road Diesel Mobile Machinery", diesel engine is free to add

The smoke value measured by the opacity smoke meter under the fast state is ≤0.8m-1.


8.National emission standards and oil standards

8.1 Fuel usage requirements: please use the standard national five light diesel oil, the sulfur content of the diesel oil is ≤10ppm.

8.2 Please keep the original invoice for purchasing diesel and engine oil, which can be used as a reference for warranty.

8.3 The smoke value of the original diesel engine is ≥1.61m-1, please repair or adjust the engine in time. Large original smoke values ​​are likely to cause vector insertion.

8.4 Requirements for the use of engine oil: low-ash engine oil is recommended. Grades above CH are recommended. The engine oil grade can also easily cause carrier insertion.

8.5 Make a record of operating hours or mileage each time you refuel.

8.6 National emission standards for the smoke emission value of diesel engine exhaust

 

◆ PM black smoke value (smoke value) of the national zero-emission engine ≥2.5m-1

◆ PM black smoke value (smoke value) of National No. 1 emission engine ≤2.5m-1

◆ PM black smoke value (smoke value) of National II emission engine ≤1.37m-1

◆ PM black smoke value (smoke value) of national three emission engine ≤0.8m-1

◆ PM black smoke value (smoke value) of national four emission engine ≤0.5m-1

◆ PM black smoke value (smoke value) of National V emission engine ≤0.3m-1

◆ PM black smoke value (smoke value) of National VI emission engine ≤0.1m-1


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