Preparation method of paper-based high-strength after-treatment carrier unit

Abstract

The invention relates to a paper high-strength after-treatment carrier unit which is characterized in that an inorganic fiber heat-resistant reinforced paper filter disc with the length L of 4,000 to 9,000mm, the width D1 of 150 to 500mm and the thickness d3 of 0.5 to 5mm is used as a substrate, two sinusoidal reinforced heat-resistant fiber paper ropes with the diameters D2 of 1 to 10mm are sewn on the filter disc, the fiber paper filter disc is tiled, reinforcing liquid is sprayed on the fiber paper filter disc, both sides of the paper are blown by the compressed air to remove residual liquid and the paper is blown dry by a hot air gun with the temperature of 50 to 80 DEG C; and the filter disc processed by the reinforcing liquid is wound to form the carrier unit and the carrier unit is arranged in the shell. A plurality of uniform wedge-shaped buffer spaces are distributed at the inlet end or the outlet end; under the condition that the filtering effect is not reduced, the low back pressure is reduced and the replacement and maintenance interval is prolonged, and thus, as a after-treatment carrier, the product can be used as a carrier for DOC (Dissolved Organic Carbon), POC (Particulate Organic Carbon), a DPF (Diesel Particulate Filter) and SCR (Selective Catalytic Reduction) and has a certain actual significance and high practical value.

Description

technical field [0001] The invention relates to a preparation method of a paper-based high-strength after-treatment carrier unit, which is applied to the DOC, SCR or POC after-treatment industry of automobile exhaust. Background technique [0002] At present, the world is facing comprehensive challenges of energy and environment. In the selection of technical means to meet the emission standards of traditional vehicles, people still face many difficulties, for example, how to choose the carrier and catalyst for post-treatment. [0003] In the face of increasingly stringent environmental protection regulations, the restrictions on particles are becoming more and more stringent. The existence of particulate matter from PM2.5 to PM10 has attracted widespread attention from the society; PM2.5 refers to particulate matter with a diameter less than or equal to 2.5 microns in the atmosphere. Also known as particulate matter that can enter the lungs, its diameter is less than 1 / 20 ...

AI Technical Summary

Problems solved by technology

Here, it is not to say that there is no problem with the packaging of the metal carrier. On the contrary, various technical measures must be taken to meet the anti-vibration requirements of the cold and hot states of the vehicle; for example, the columnar metal carrier can be integrated The brazing process is carried out in a vacuum brazing furnace. Although this process can well solve the strength problem of the carrier unit, the cost of equipment and production process is high, and it is completely inconsistent with the green process of low-carbon energy saving and environmental protection. Features: It is also possible to install support structures at both ends of the columnar metal carrier, or to 'cross the ribs' between the columnar metal carriers, etc. These measures have changed the most basic airflow field of the carrier The uniformity of the distribution, the result is 'local uneven force', which will cause damage in the form of displacement and other forms when passing the GB or HJ vibration test

[0009] Similarly, metal carriers with various wire mesh structures have appeared on the market. However, there are different degrees of clogging problems in this kind of samples in the prescribed 500~1000h bench aging test. The back pressure index of the measured samples The detection is greater than 15kPa, and the highest is 23kPa. When the back pressure is high, the fuel economy of the vehicle will deteriorate. The reason for these clogging problems is that there is a problem in the matching between the macroscopic results and the microscopic structure of this type of carrier, that is, when the filter is added. The air flow channel should be optimized while the area (filter bed volume) is used;

Images