Method for integrated desulfurization and denitration for marine ship exhaust

A technology for desulfurization and denitrification, ship exhaust, applied to chemical instruments and methods, separation methods, separation of dispersed particles, etc., can solve the problems of large power consumption, bulky volume, and high price

Inactive Publication Date: 2011-02-16
WUHAN TEXTILE UNIV
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  • Abstract
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Problems solved by technology

[0004] However, there are still two problems that need to be solved in this ozone oxidation combined with seawater washing process: ① the ozone generator required by this process has too much power consumption, is bulky and expensive
Taking a 3000kW marine diesel engine as an example, if the NO emission in the exhaust gas is 11g/(kW.h), then according to O 3 According to the principle of mole number: NO mole number=1:1, the output of the ozone generator required to oxidize NO should be calculated to be 52.8kg/h, and the power of the large-scale oxygen source ozone generator with an ozone output of 50kg/h is 400kW, exte

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  • Method for integrated desulfurization and denitration for marine ship exhaust

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Embodiment Construction

[0012] combined with figure 1 and one A kind of embodiment of the present invention is further described as follows to the method for integrated desulfurization and denitrification of marine vessel tail gas:

[0013] Such as figure 1 As shown, a method for integrated desulfurization and denitrification of marine ship tail gas is composed of three steps in series: spray humidification and cooling, discharge oxidation and seawater washing. The system is divided into spray humidification and cooling zone 12, discharge oxidation zone 11 and seawater washing zone 10, so that the exhaust gas produced by marine diesel engine 1 with a temperature of 200°C to 490°C is washed according to the spray humidification and cooling zone 12, discharge oxidation zone 11 and seawater washing zone. Zones 10 are sequentially passed through to complete the integrated desulfurization and denitrification of tail gas.

[0014] The spray humidification and cooling zone 12 is composed of a small seaw...

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Abstract

The invention discloses a method for integrated desulfurization and denitration for marine ship exhaust, and belongs to the fields of air pollution control and marine ship exhaust control. The exhaust passes through an atomizing humidification and cooling area, a discharging oxidation area and a seawater washing area in turn to complete the integrated desulfurization and denitration. The exhaust is humidified and cooled by the atomizing humidification and cooling area consisting of a small seawater pump, an exhaust humidifying and cooling pipe and a nozzle; SO2 and NO are converted into sulfuric acid and nitric acid by massive HO2, OH and other oxidative free radicals in the charging oxidation area consisting of a plasma generator; and the sulfuric acid and nitric acid are converted into sulfate and nitrate by the seawater washing area consisting of a seawater washing tower, a filler and a large seawater pump, and the exhaust meeting the standard and washing water are discharged. The integrated desulfurization and denitration system has the advantages of low energy consumption, small volume, low price, no need of a seawater quality restoring system or raw material storage and transportation, direct discharge of products into sea and the like.

Description

technical field [0001] The invention relates to a method for integrated desulfurization and denitrification of marine ship tail gas, in particular to a method for integrated desulfurization and denitrification of marine ship tail gas that integrates the three processes of spray humidification cooling, discharge oxidation and seawater washing in series, and belongs to The field of air pollution control and marine ship exhaust emission control. Background technique [0002] For marine marine diesel engine exhaust NO x and SO x At present, there are mainly SCR method and seawater washing method for the two kinds of pollutants, but neither of these two methods can efficiently remove NO x and SO x , so that it is difficult to completely use one of the methods to make the exhaust gas of the ship meet the NO x and SO x Therefore, it is necessary to use two systems on the ship to desulfurize and denitrify separately, which will inevitably greatly increase the cost of desulfuriz...

Claims

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Application Information

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IPC IPC(8): B01D53/60B01D53/92
Inventor 余奇余刚
Owner WUHAN TEXTILE UNIV
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