Round/Professional Production DPF Passive Regeneration Diesel Particulate Filter

Product Description

Passive regeneration is to use chemical catalysis to reduce the reactivity of particles, which can make particles burn under the normal operating conditions of diesel engine and achieve the purpose of regeneration. Include NO2 regeneration, catalytic combustion regeneration filter (CDPF) regeneration and fuel additive regeneration.

(1) regeneration by NO2 In this method, DOC and DPF are used together. when diesel engine exhaust gas passes through DOC, at 200-600℃, CO and HC are almost completely oxidized into CO2 and H2O at first, and NO is converted into NO2. Then NO2 oxidizes particulates in DPF to generate CO2, and NO2 is reduced to NO, thus achieving the purpose of regeneration. Regeneration with NO2 takes up less space and is not expensive. However, this technology requires that the ratio of NOx to PM should be at least 15: 1, and it is only suitable for low-sulfur diesel engines. If the sulfur content is too high, sulfate will be generated, which will affect its use. At the same time, the passive regeneration needs a suitable exhaust temperature, and the temperature is too high, and the decomposition of NO2 is accelerated, which cannot form enough NO2; When the temperature is too low, NO2 oxidizes C too slowly.

(2) Regeneration of catalytic combustion regeneration filter (CDPF) CDPF is a kind of filter which is directly coated with oxidation catalyst to reduce the ignition temperature of soot, so that it can burn at the normal exhaust temperature of diesel engine and be completely regenerated in a specific temperature window (T>320-350℃). This technology also requires high sulfur content in diesel oil, which requires engine thermal management. When the exhaust temperature is low, emissions will increase.

(3) regeneration of fuel additive Fuel additives are generally soluble metals or metal salts, etc., and the metal oxides generated after combustion play a catalytic role on the particles, reducing the ignition temperature of the particles, so that the filter can regenerate itself without external energy at a lower exhaust temperature. However, when the combustion products of fuel additives flow through the filter along with the exhaust gas, some of them will be deposited. The additive metal combustion products accumulated on the filter body will block the pores of the filter body and shorten the service life of the filter. If the additive metal combustion products are deposited too much, the back pressure will rise, which will affect the power performance and economy of the diesel engine, and the metal floating dust discharged into the atmosphere will cause secondary pollution.

2. GRACE DPF general specifications

Company Information

Grace Environmental Protection Technology Co., Ltd. is a technical enterprise specialized in various types of exhaust gas treatment. The team has rich internal combustion engine exhaust gas and VOC treatment experience and more than ten years of working experience, and is a very few suppliers with the ability to design the whole process from catalyst to overall solution. At present, the products cover all kinds of exhaust catalysts, DOC,CDPF,SCR,ASC, etc. At the same time, they cover waste liquid treatment and indoor air purification, providing customers with the most competitive products and services. At present, the company has passed the certification of ISO14001 environmental management system, ISO9001 international quality certification, AAA enterprise credit rating and other certifications, and has an annual output of 500,000 litres of catalyst production coating line, complete quality management system and process control. Various performance testing capabilities, including SRD,SRF,ICP,BET, etc.!

Packaging & Shipping

Certifications

FAQ

Q1. What is your terms of packing?
A: Generally, we pack our goods in neutral white boxes and brown cartons Or wooden cases and foam. If you have legally registered patent,
we can pack the goods in your branded boxes after getting your authorization letters.

Q2. What is your terms of payment?
A: T/T 30% as deposit, and 70% before delivery. We'll show you the photos of the products and packages
before you pay the balance.

Q3. What is your terms of delivery?
A: EXW, FOB, CRF, CIF, DDU.

Q4. How about your delivery time?
A: Generally, it will take 30 to 60 days after receiving your advance payment. The specific delivery time depends
on the items and the quantity of your order.

Q5. Can you produce according to the samples?
A: Yes, we can produce by your samples or technical drawings. We can build the molds and fixtures.

Q6. What is your sample policy?
A: We can supply the sample if we have ready parts in stock, but the customers have to pay the sample cost and
the courier cost.

Q7. Do you test all your goods before delivery?
A: Yes, we have 100% test before delivery

Q8: How do you make our business long-term and good relationship?
A: 1. We keep good quality and competitive price to ensure our customers benefit ;
2. We respect every customer as our friend and we sincerely do business and make friends with them,
no matter where they come from.