Filter element

Abstract

The invention relates to a filter element (1, 21) which is particularly used for filtering a liquid to be solidified and is particularly used for filtering a reducing agent for selective catalyctic reduction in an exhaust after-treatment device of an internal-combustion engine, wherein the filter element (1, 21) is provided with at least one gap (2, 3) and/or a containing part (22, 23). A pipeline heating the filter element (1, 21) is inserted or can be inserted into the gap and/or the containing part, wherein the pipeline guides the fluid with increased temperature so that the filter element (1, 21) can form a radiator.

Description

technical field [0001] The invention relates to a filter element, in particular for filtering a liquid to be solidified, in particular for filtering a reducing agent for selective catalytic reduction in an exhaust gas aftertreatment device of an internal combustion engine. Background technique [0002] In order to reduce nitrogen oxides in the exhaust gases of combustion plants, waste combustion plants, industrial plants and engines, ammonia or ammonia solutions such as so-called AdBlue are mixed into the exhaust gases. AbBlue is a synthetic 32.5% urea solution according to DIN 70070 for aftertreatment of exhaust gases in SCR catalytic converters. Here, nitrogen oxides (NOx) are reduced by approximately 90% by selective catalytic reduction (SCR). x ) emissions. Urea solutions such as AdBlue freeze at about -11°C. In order to ensure the operation of the metering system for injecting urea solutions such as AdBlue into the exhaust gas even at temperatures below this, system ...

AI Technical Summary

Problems solved by technology

[0004] The disadvantage here is that electrical energy is required for heating

Furthermore, it is disadvantageous that replacement either entails an expensive ...

Images