Exhaust Gas Purifiers for Marine Diesel Engines
A technology for diesel engines and exhaust gas purifiers, used in chemical instruments and methods, gas treatment, air quality improvement, etc.
Active Publication Date: 2020-07-14
陈妙生
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Problems solved by technology
[0002] At present, for small and medium-sized high-speed high-power marine diesel engines, there is no treatment device with a special geometric shape for the exhaust gas containing hydrocarbons, carbon monoxide, nitrogen oxides, dust, and noise due to incomplete combustion. The grid sheet is used as a carrier, which is arranged to form a number of airflow filtration channels. The surface is coated with a noble metal three-way catalyst, and a metal return wire made of stainless steel chips is configured as a filter contact device to form a set of exhaust gas purifiers. It is used to treat the exhaust gas emitted by small, medium, high-speed and high-power marine diesel engines due to incomplete combustion, and implements catalytic oxidation reduction, contact and filtration, separation and purification, and at the same time, it is efficient in dust removal and noise reduction for exhaust gas containing dust and noise. Green facilities
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[0048] The device of the present invention will be further described below in conjunction with the embodiments and accompanying drawings.
[0049] according to figure 1 , figure 2 , image 3 , Figure 4 As shown, the exhaust gas purifier 1 includes an outer circular shell 4, and an exhaust gas inlet pipe 2 with a flange, an inlet variable diameter pipe 3, and a first-stage exhaust gas catalytic oxidation reduction device are sequentially arranged in the outer circular shell 4 5. The second-stage exhaust gas filtering contact device 6, the third-stage exhaust gas catalytic oxidation reduction device 7, the fourth-stage exhaust gas purification and separation device 8, the outlet reducing pipe 16, the exhaust gas outlet pipe 17 with flange; in the outer circular shell 4 On the exhaust gas inlet pipe 2 and the exhaust gas outlet pipe 17 at both ends, there are water inlet pipes 18 and outlet pipes 20 for backwashing, which are connected to the control valve 19 for the water i...
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Abstract
The invention is an exhaust gas purifier for a marine diesel engine, which is used for the treatment of hydrocarbons, carbon monoxide, nitrogen oxides, dust, and noise in the exhaust gas discharged from the fuel incomplete combustion of the diesel engine; it is characterized in that: Exhaust gas under high-pressure conditions flows through the decompression of the reducing pipe, is split and separated, and then flows into the first-stage exhaust gas catalytic oxidation reduction device, the second-stage exhaust gas filtration contact device, the third-stage exhaust gas catalytic oxidation-reduction device, and the fourth-stage exhaust gas catalytic oxidation-reduction device. The first-level exhaust gas purification and separation device has been repeatedly treated by secondary catalytic redox, filtration contact, and separation and purification. The catalytic reduction efficiency of the exhaust gas containing hydrocarbons, carbon monoxide and nitrogen oxides can reach more than 95%, and the dust particle size PM2.5 The above removal rate can reach more than 90%, and the overall noise reduction ability of the noise can reach more than 45 decibels, so as to implement a stable catalytic reduction, dust separation and purification for the exhaust gas, and can also achieve the purpose of noise reduction.
Description
technical field [0001] The invention belongs to the field of exhaust gas purification of marine diesel engines, in particular, the exhaust gas discharged due to incomplete combustion is purified. Background technique [0002] At present, for small and medium-sized high-speed high-power marine diesel engines, there is no treatment device with a special geometric shape for the exhaust gas containing hydrocarbons, carbon monoxide, nitrogen oxides, dust, and noise due to incomplete combustion. The grid sheet is used as a carrier, which is arranged to form a number of airflow filtration channels. The surface is coated with a noble metal three-way catalyst, and a metal return wire made of stainless steel chips is configured as a filter contact device to form a set of exhaust gas purifiers. It is used to treat the exhaust gas emitted by small, medium, high-speed and high-power marine diesel engines due to incomplete combustion, and implements catalytic oxidation reduction, contact ...
Claims
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IPC IPC(8): B01D53/94B01D53/56B01D53/62B01D53/72B01D50/00
CPCB01D53/945B01D2255/10B01D2258/012B01D50/40Y02A50/20
Inventor 陈妙生
Owner 陈妙生