Method and device for cleaning filter for removing particulate matter
A particulate matter and filter technology, applied in the field of cleaning filters, can solve the problems of increasing the pressure difference of the filter and difficulty in the operation of the device for removing particulate matter.
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no. 1 example ）
[0038] figure 1 is a view showing the structure of the apparatus 100 for cleaning a filter for removing particulate matter in the first embodiment. figure 1 Internal combustion engine 1 , exhaust duct 2 of internal combustion engine 1 , and cleaning device 100 are shown. Exhaust gas from the internal combustion engine 1 passes through the exhaust passage 2, and is discharged into the atmosphere. exist figure 1 , the flow direction F1 of the exhaust gas is the rightward direction.
[0039] The cleaning device 100 includes a filter 3 , an injector 4 , a high-pressure air feeder 5 , a high-pressure steam feeder 6 , an air switch valve 7 , a steam switch valve 8 , a controller 9 , an upstream gas pressure sensor 11 and a downstream gas pressure sensor 12 .
[0040] The filter 3 is installed in the exhaust passage 2, and captures particulate matter contained in the exhaust gas.
[0041] figure 2 It is a side sectional view showing the structure of the honeycomb filter 3 . Th...
no. 2 example ）
[0060] Figure 4 is a view showing the structure of an apparatus 200 for cleaning a filter for removing particulate matter in the second embodiment. This second embodiment has an exhaust gas boiler 16 instead of the high-pressure steam feeder 6 in the first embodiment. Both the high-pressure steam feeder 6 and the exhaust gas boiler 16 are high-pressure steam feeders that can feed high-pressure steam. The second embodiment has the same structure as the first embodiment except for the structure of the exhaust gas boiler 16 .
[0061] An exhaust gas boiler (steam generator) 16 is installed on the exhaust passage 2 . The exhaust gas boiler 16 is located downstream of the filter 3 in the direction of flow F1 of the exhaust gas. Water is supplied into the exhaust gas boiler 16 . The exhaust gas boiler 16 boils water and generates high-pressure steam through heat exchange between water supplied into the exhaust gas boiler 16 and exhaust gas flowing through the exhaust passage 2 ...
no. 3 example ）
[0065] Figure 5 is a view showing the structure of an apparatus 300 for cleaning a filter for removing particulate matter in the third embodiment. This third embodiment has an exhaust passage 102 instead of the exhaust passage 2 of the first embodiment. The exhaust passage 102 has three branched passages 102a, 102b and 102c located in the middle portion. One filter 3 is arranged in each of the three branching channels 102a, 102b and 102c. This third embodiment has three injectors 4 to correspond to each filter 3 respectively. This third embodiment also has a high-pressure air feeder 5, a high-pressure steam feeder 6 and switches (air switching valve 7 and steam switching valve 8), but they are not shown. Naturally, high-pressure air feeder 5 , high-pressure steam feeder 6 and switches (air switching valve 7 and steam switching valve 8 ) are arranged so that one of high-pressure air and high-pressure steam can be alternately supplied to each ejector 4 .
[0066] The operat...
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