Green Union Purification L-DEZS series heavy-duty diesel engine exhaust dry particulate matter collector is a new type of diesel engine exhaust treatment device developed by the technical team of Green Union Purification Technology (Dongguan) Co., Ltd. using internationally advanced adsorption and catalytic oxidation processes, and has all intellectual property rights . It belongs to the third generation of diesel engine black smoke purifiers . The diesel engine exhaust particulate collector is composed of multiple sets of metal DPF carriers in parallel. It adopts a snap-on fixed and removable unit design. When the PM carbon particle plug causes high back pressure, the electronic pressure sensor senses the pressure signal and transmits it to the electronic control system to alarm and open the bypass. The filter unit can be flexibly withdrawn for water washing and regeneration, and no energy is consumed during operation. It has the advantages of high processing efficiency, small startup pressure, long blocking time, convenient and quick regeneration and cleaning, convenient direct lifting and installation, stainless steel for a long service life, noise reduction function, no power loss, and high safety factor of automatic bypass alarm.

The black smoke exhaust purifier box is made of 409 stainless steel, the bypass adopts a high temperature resistant and rainproof butterfly valve, and the filter element is made of alloy wire filter element, which will never rust for life. The inlet and outlet adopt national standard flanges, equipped with 4 flanges and corresponding nuts, which are convenient for direct installation. It is suitable for banks, airports, data centers , support centers, hospitals, schools, real estate, test rooms, rental units, etc. The exhaust black smoke purification treatment of diesel generator sets . After treatment, the final exhaust treatment effect meets the " Comprehensive Emission Standard of Air Pollutants " GB16297-1996 Level 2, and the smoke blackness reaches below Level 1 of Ringelmann Blackness , which meets the national emission standards.

1. Structure of particle collector ( black smoke purifier )

Green Union Purification L-DEZS series alloy metal particle collectors are composed of alloy metal filter units, stainless steel housings, bypass pipes and control units. This series of products can effectively treat particulate matter in the exhaust of high-horsepower diesel engines , with the characteristics of small installation size, convenient hoisting, safe operation, low back pressure when starting up, and convenient disassembly and cleaning. It has a certain noise reduction and silencing effect; at the same time, the cost of later cleaning and maintenance is low.

2. Introduction of Alloy Metal Filter Element Unit

2.1. Core filter material: alloy wire

The filter element unit is a metal filter layer made of alloy metal wire through a special process, which is superimposed with multiple layers and specially designed with unique technology. The alloy metal wire filtration area of a single filter element unit reaches 1.3m2, and the flue gas treatment capacity is 4-5L. It can be directly washed with tap water, and is resistant to high temperature, oxidation and rust.

2.2. Alloy metal filter element unit

The alloy wire used in the alloy metal filter element unit is manufactured by special technology, and the treated material is used as a carrier in parallel to form a diesel engine exhaust particulate collector . The snap-on fixed removable unit design and automatic bypass monitoring and alarm system allow the filter unit to be flexibly withdrawn for water washing and regeneration. It does not consume any energy during operation and has the advantages of high treatment efficiency, small startup pressure, long clogging time, convenient and fast regeneration and cleaning, convenient direct lifting and installation, and high safety factor of automatic bypass alarm. It can effectively remove black smoke particles (PM) in the exhaust gas of diesel generator sets .

3. Working principle of particle collector ( black smoke purifier )

As shown in the above schematic diagram, when the exhaust gas emitted by the engine enters the particulate matter collector box, the exhaust gas fills the entire box, and the exhaust gas enters the alloy metal laminate from all sides of the filter element. The carbon particles are intercepted on the metal disc, and the filtered exhaust gas flows out from the center of the filter element unit, enters the rear gas guide groove, and is then discharged, thereby achieving the control of particulate matter in the engine exhaust gas.

The control unit of the particulate matter collector consists of a pressure sensing detection system , a bypass system, and a control system:

1. Pressure sensing detection system: 

The electronic pressure sensor uses high-precision, high-stability diffused silicon pressure sensitive chips, and converts the measured pressure value into an accurate electrical signal through a reliable amplifier. High-quality sensors, exquisite packaging technology and perfect assembly technology ensure the quality and performance of pressure detection and accurate signal conversion.

2. Bypass system: 

The purifier includes a bypass pipe, a high temperature resistant solenoid valve, a pressure detection system and a control system. When the particulate matter collector reaches the preset back pressure limit due to excessive carbon deposits, the control unit controls the high temperature resistant solenoid valve to automatically open the bypass to ensure the normal operation of the unit. When the generator set is shut down and cooled, the filter element unit can be flexibly pulled out and the carbon deposits can be cleaned by flushing with tap water.

3. Control system: 

The control system controls the operation of the bypass valve in the bypass system according to the data detected and transmitted by the pressure detection system to ensure the safety of the purifier during use on the unit.

1. The purifier has great comprehensive advantages

1.1. The purifier has novel technology for treating black smoke;

1.2. The overall size of the equipment is small, and the treatment effect is better than other products such as water spraying and ordinary ceramics;

2. Low-altitude emissions and governance up to standard

2.1. No special smoke pipe investment required for high-altitude emission, saving costs;

2.2. The engine exhaust after being treated by the purifier can be directly discharged at low altitude to meet environmental protection requirements;

3. High processing efficiency

3.1. Green Union Purification L-DEZS series dry exhaust black smoke purifier adopts a metal filter element processing unit designed and made of special alloy metal wire mesh ;

3.2. The single filter element has a large processing area, the exhaust gas processing capacity is 5L, and the effective filtration area is 1.3m3;

3.3. When the exhaust gas passes through the carrier filter element, the carrier can effectively adsorb PM ( carbon particles ) and extend the clogging time;

3.4. The filtering efficiency of carbon particles in engine exhaust is as high as 95%-98%;

4. Easy cleaning and maintenance, almost zero maintenance cost

4.1. Buckle design. When the purifier needs to be cleaned, loosen the buckle and pull out the filter unit, which is convenient and quick;

4.2. Easy to clean: Just rinse with tap water for 3-5 minutes to clean the carbon deposits;

4.3. Flushing with tap water, no energy consumption, and no secondary pollution;

4.4. There is no consumption during use and regeneration, no secondary pollution, no high-power electricity consumption, and the time cost is extremely low.

4.5. The filter element can be reused for a long time without consumables to be replaced;

5. Low back pressure when starting up

5.1. The unique design of the box structure and high-efficiency processing capacity, the purifier startup back pressure is less than 1kpa, which has little impact on the operation of the unit;

6. Safe and reliable operation

6.1. The whole box is made of 304/409 stainless steel and is precision welded;

6.2. The purifier is equipped with a bypass system to ensure safe operation;

6.3. The purifier is equipped with an independent electronic control system to monitor the back pressure of the unit in real time. When the back pressure reaches the set limit, the bypass system will automatically open and the sound and light alarm system will be activated at the same time to ensure the normal operation of the unit;

7. Long service life of the purifier

7.1. The filter element is a metal filter made of alloy metal wire through professional design. It is not easy to oxidize or rust under high temperature and can be reused;

7.2. The box body simulates the engine exhaust fluid mechanics design and is precision welded with 304 stainless steel plates, with the same service life as the engine.

8. Hoisting design, easy installation

8.1. The overall structure of the purifier is reasonably designed, without taking up extra space, without elbows and without additional back pressure increase;

8.2. It complies with the engine exhaust fluid mechanics design, has reasonable volume and weight, and is suitable for hanging on the top of the machine room;

9. Technical service advantages

9.1. A mature technical service team, including a doctoral experimental team, senior experts in the generator set and exhaust gas treatment industry;

9.2. Complete pre-sales, sales and after-sales service system;

9.3. Respond quickly and provide feasible solutions to any installation problems or emergency failures.

Leelool's main product, diesel generator black smoke purifier , can match mainstream diesel engine brands at home and abroad, including Cummins diesel generator , Perkins diesel generator , MTU diesel generator , Caterpillar CAT diesel generator , Doosan diesel generator , Volvo diesel generator , Jenbacher diesel generator , Shangchai diesel generator , Googol diesel generator , Mitsubishi Heavy Industries diesel generator , Weichai diesel generator , Yuchai diesel generator , Jichai diesel generator , Tongchai diesel generator , etc. Select the model according to the size of the engine exhaust volume, and achieve satisfactory treatment effect based on the actual situation.

Diesel generator sets are diesel engines used in fixed machinery. Except for the power supply vehicle, which can be moved, diesel generator sets are fixed in place when running. The black smoke of diesel generator sets with an exhaust volume of less than 10L is easy to control. Most 200kW diesel generator sets have different operating conditions and adopt different black smoke control technical routes . The standby emergency diesel generator set uses an alloy metal DPF that is easy to clean for physical filtration. The detachable filter element is easy to clean carbon deposits and put into use again. For the black smoke of the main diesel generator set, the technical route of catalytic oxidizer (DOC) + catalytic oxidation particulate filter (cDPF) is adopted.

Diesel engines are called the heart of mobile machinery . They are widely used in various road or non-road fixed and mobile machinery due to their high power output and convenient fuel addition. However , the emissions of engines designed with different technical platforms and mechanisms vary greatly. The black smoke and NOx content of engines using high-pressure common rail electronic injection technology are very different from those of conventional diesel engines . At the same time, different types of machinery, different engineering scenarios, different loads, different fuels, and different climatic conditions require different technical routes for diesel exhaust black smoke treatment . The technical staff of the Leelool technical team of Green Union Purification who are engaged in diesel engines, catalysts , electrochemistry, mechanical packaging, etc. have more than 20 years of experience in the industry and can customize black smoke treatment solutions according to different situations.

The power of forklift diesel engines is generally small, with a displacement of less than 5L, and they work intermittently, with load changes and low exhaust temperature. In response to these situations, Green Union Purification has developed a filter made of 304 stainless steel to perform physical filtration with a folding fan structure DPF. When the carbon deposits reach the back pressure limit, the display screen in front of the cab will alarm, prompting water washing and cleaning.

According to the current non-road exhaust purification and treatment emission standards , the exhaust purification and treatment of non-road engineering machinery is mainly carried out by installing a particulate matter trap (DPF) to treat particulate matter (PM) generated by combustion. The metal disc filter is composed of metal discs and is an exhaust purification device that physically filters particulate matter. The filter is composed of multiple sets of metal filter discs in parallel to form a diesel engine particulate filter element. It adopts a removable clamp fixing design and is equipped with a pressure sensor and a monitoring device on the outside. When the particulate matter is collected to a certain extent, the back pressure of the filter increases, which will trigger an alarm. At this time, the filter element can be pulled out for cleaning and regeneration, and its particulate matter removal rate is as high as 90%-98%. The filter operation and filter element regeneration process do not require any energy consumption. The filter element is used for life, and its life span is the same as that of the matching diesel engine. The overall cost is low and the installation is convenient.