Reducing agent injection device, exhaust gas treatment device, and exhaust gas treatment method
一种喷射装置、还原剂的技术，应用在排气处理、消音装置、排气装置等方向，能够解决温度降低、蜂窝结构部温度不均等问题
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Embodiment approach 1
[0041] (1) Reductant injection device
[0042] figure 1 It is a schematic sectional view showing the reducing agent injection device according to Embodiment 1 of the present invention (a schematic sectional view parallel to the direction in which the cells of the honeycomb structure portion extend).
[0043] Such as figure 1 As shown, the reducing agent injection device 100 of the present embodiment includes a honeycomb structure 1 , an outer cylinder 2 , a urea sprayer 3 , a carrier gas introduction cylinder 4 , and a carrier gas flow increaser 5 .
[0044] The honeycomb structure 1 has: a columnar honeycomb structure portion 11 having a partition wall 15 defining a plurality of compartments 14 extending from a fluid inflow end surface 13a to a fluid outflow end surface 13b; and at least a pair of electrode portions 12, which are arranged On the side surface of the honeycomb structure part 11, it is used to heat the honeycomb structure part 11 by passing electricity. The c...
Embodiment approach 2
[0134] Figure 5 It is a schematic sectional view showing the reducing agent injection device according to Embodiment 2 of the present invention (a schematic sectional view parallel to the direction in which the cells of the honeycomb structure portion extend).
[0135] Such as Figure 5 As shown, the difference between the structure of the reducing agent injection device 200 of this embodiment and the structure of the reducing agent injection device 100 of Embodiment 1 is that: on the side of the fluid outflow end surface 13b of the honeycomb structure part 11, there is also a spacer between the fluid outflow end surface 13b Urea hydrolysis catalysts 31 arranged at intervals. It should be noted that the other configurations of the reducing agent injection device 200 according to the present embodiment are the same as those of the reducing agent injection device 100 according to the first embodiment, and therefore description thereof will be omitted, and only the differences ...
Embodiment approach 3
[0140] Figure 6 and Figure 7 It is a schematic cross-sectional view showing the exhaust gas treatment device according to Embodiment 3 of the present invention.
[0141] Such as Figure 6 and Figure 7 As shown, the exhaust gas treatment devices 300 and 400 of this embodiment are equipped with: an exhaust cylinder 61, which is used for exhaust gas circulation; a reducing agent injection device 100, which injects ammonia into the exhaust cylinder 61; and an SCR catalyst 62, which is configured It is located on the downstream side of the exhaust cylinder 61 from the position where the ammonia is injected.
[0142] The exhaust pipe 61 is a pipe through which exhaust gas (exhaust gas containing NOx) discharged from various engines or the like flows, and the exhaust gas and ammonia are mixed therein. The size of the exhaust pipe 61 is not particularly limited, and may be appropriately determined according to an exhaust system of an engine or the like to which the exhaust gas ...
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Abstract
Description
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Application Information
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