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Hebei Hanlan Wanchun series generator set exhaust gas purifier For the carbon particle pollutants (PM) in diesel engine exhaust emissions, the Wanchun "ZDF" and "FDF series purifiers" developed by Hebei Hanlan can effectively reduce emissions and have been matched for many domestic mechanical and electrical equipment. The exhaust gas purifier of Wanchun ZDF and FDF diesel generator sets can reduce the soot generated by diesel engines by more than 90%. The main filter material of the purifier is a DPF soot particulate filter (i.e. DPF ceramic filter element), and the trap is a filter installed in the emission system that traps particulate emissions before they are discharged into the atmosphere. Among them, the particulate emissions captured by the FDF generator set black smoke purifier can then be regenerated during the normal operation of the unit, achieving the purpose of continuous work and avoiding the trouble of manual cleaning and regeneration. Diesel particulate traps (DPFs) are made of aerated porous cordierite material, and the filtered ceramic carrier is composed of many tiny parallel pores; These parallel pores are separated by ventilation hole walls, one end is open, the other end is blocked, the micropores in the filter hole wall can allow the exhaust gas molecules of diesel engines to pass through, and the black smoke particles cannot pass through the micropores due to the large particle size, and are filtered on the surface of the ceramic hole wall, so as to achieve the effect of eliminating black smoke. DPF has a relatively high filtration effect on soot particles (PM) and black smoke particles, generally more than 90%. Water filtration exhaust gas purification device Dry exhaust gas purification device Purifying effect It has little purification effect on soot particles. CO Purification Rate: 0% HC Purification Rate: 0% Imitation Odor Purification Rate: 0% Soot particle purification rate: more than 90% CO and HC purification rate: 75-90% The effect on sulfide is not obvious Post-maintenance Water needs to be replenished regularly, which increases the manual workload and is prone to backflow Maintenance-free or regular cleaning of carbon deposits is sufficient Device type Transition products Special equipment life span Short service life Long service life Consumables cost Produced in a short period of time For a longer time Installation space The volume is large and requires a large floor installation space It takes up relatively little installation space and can be installed in the air cost Cheap The price is relatively high DOC precious metal oxidation catalytic catalytic converter For the treatment of CO and HC compounds, Hebei Hanlan selected DOC precious metal oxidation catalytic catalyst. Although soot in PM is difficult to oxidize, it is very effective in oxidizing soluble organic matter (SOF) in PM. The main purpose of oxidizing catalytic converters (DOCs) is to reduce particulate matter (black smoke) and harmful gases emitted from the engine. The removal efficiency of particulate matter (PM) is about 20%, and the purification rate of harmful gases (CO, HC) is about 75%-90%. The DOC type purification unit is easy to install and does not require engine modifications. The Wanchun DOC can basically be maintained for a long time when running, and only periodic inspection is required. Oxidation chemical reaction principle: CO＋1/2O2→CO2 4HC＋5O2→4CO2＋2H2O C＋O2→CO2 DOC purification efficiency and characteristics For the treatment of NOX, Hebei Hanlan adopts Selective Catalytic Reduction denitrification technology, referred to as SCR denitrification technology. It is a process that has been gradually applied to flue gas denitrification of industrial boilers and power station boilers since the early 80s of the 20th century, and it is also one of the * widely used and effective flue gas denitrification technologies in the world. This technology is basically used in * power plants in Japan, Europe, the United States and other countries. Wanpure SCR denitrification system Wanchun SCR denitrification system is an equipment that uses the reducing agent urea to be pyrolyzed and hydrolyzed into ammonia (NH3) in flue gas pipelines, and NH3 and NOx react under the action of catalyst to produce non-toxic nitrogen (N2) and water, which can meet the requirements of NOx emission indicators in China, and has the advantages and characteristics of safe and reliable operation, small footprint and high denitrification efficiency, and is currently widely used at home and abroad. Reaction principle of SCR denitrification system Urea is broken down as follows: (NH2) CO H2O = 2NH3 CO2 Urea is pyrolyzed and hydrolyzed to produce ammonia, which provides raw materials for reactions. NH3 reacts with NOx as follows: 4NH3 4NO O2 = 4N2 6H2O 2NH3 NO NO2 = 2N2 3H2O 8NH3 6NO2 = 7N2 12H2O Our company uses high-efficiency denitrification zeolite catalysts, mainly iron-based zeolite and vanadium-based denitrification catalysts. Iron-based zeolite is very sensitive to sulfur content, but the sulfur content of natural gas is extremely low, generally not exceeding 4ppm, so there is no problem of poisoning iron-based zeolite SCR. Hazardous substances Purification rate peculiarity NOx The purification rate is more than 90% mature technology and wide application; high and stable NOx removal rate; optimization of reducing agent dosage, escape rate of trace ammonia; The by-products after the reaction are nitrogen and water, and there is no secondary pollution. At present, SCR technology is a high-end application in internal combustion engine exhaust emission control technology. Equipment use and maintenance • Installed on the exhaust system near the engine exhaust port to help maintain the suitable operating temperature of the catalyst; • The back pressure gauge is installed at the air inlet to detect the exhaust back pressure of the main engine in real time; • The exhaust port is equipped with an automatic emergency bypass valve, which automatically opens when the purifier fails to ensure the safe operation of the diesel unit. • It is advisable to use clean diesel, if the sulfur impurities are too high, it will cause catalyst poisoning, increase fuel consumption and even cause the engine to stall; • When the exhaust gas purifier of Wanchun generator set is working, the dust removal process is controlled by the solenoid valve to achieve the purpose of regeneration and cleaning, and the purge time and interval can be adjusted. • The ash accumulated in the ash storage bin needs to be cleaned regularly, and the small cover at the bottom can be removed directly. • The structure of the exhaust gas purifier of the Wanchun generator set is designed to be decomposable, the side cover plate can be removed for easy maintenance, and the side cover plate is fixed by screws; After the maintenance is completed, install it once, press the side cover plate, and the work is finished. Our company can provide solutions according to the actual needs of customers, provide non-standard customized services, and has undertaken thousands of engineering projects, and cooperated with Cummins, Caterpillar, Velia and many other domestic and foreign enterprises. Because our products are customized processing machinery and equipment, the pricing of equipment is different due to different product performance and parameters, and the platform fills in the price without reference basis.
