Method and device for washing and purifying ocean engineering power tail gas only through seawater

Abstract

The invention relates to a method and device for washing and purifying ocean engineering power tail gas only through seawater. The method includes the steps that engine tail gas and seawater are guided into a filler washing device, the purified tail gas and the washing seawater are discharged out of the washing device after washing, and the washing seawater is discharged into a sea after water quality is restored. The method and device are suitable for ocean ships, ocean platforms and other ocean engineering facilities compact in space, the engine tail gas with the smoke temperature being 200-500 DEG C is directly purified, manufacturing and running cost is low, reliability and the running rate are high, the device and an engine silencer can work integrally to achieve online running, the method is a reliable technology executing the IMO low-sulfur fuel replacement regulation and has the functions that sparks of the tail gas are thoroughly extinguished and cooling performance is good, the safety of the ocean engineering facilities is improved, and the health environment of ocean engineering operators is remarkably improved.

Description

technical field [0001] The method and device for cleaning and purifying marine engineering power tail gas by only using seawater are suitable for purifying high-temperature tail gas discharged from marine engineering power facilities such as marine ships and platforms, and belong to the technical field of marine engineering. Background technique [0002] In the past 20 years, with the increasingly prominent problems of global environmental resources, the international legislation on the control of air pollution mainly caused by sulfur dioxide caused by power exhaust emissions from marine ships, offshore platforms and other marine engineering facilities has been stricter year by year, and the United Nations Maritime Organization (IMO) implements prevention and control Low-sulfur regulations on air pollution from ships, including regulations on low-sulfur fuel oil for ships and regulations on substitution of low-sulfur fuel oil. In view of the fundamental reasons such as hig...

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Problems solved by technology

[0004] 1) The effect of absorbing sulfur dioxide is not good, the pollution reduction does not meet the requirements, and the environmental protection advantage of seawater washing process for efficient emission reduction is lost

This is mainly because the mass transfer intensity is greatly reduced when the washing medium is converted into seawater in the spray tower dedicated to the traditional process in the thermal power field

[0005] 2) In order to improve the absorption effect, the seawater spray density has to be increased, and at the same time, the exhaust gas resistance has been increased. In addition, the traditional washing device cannot directly deal with the high-temperature exhaust gas of the engine, and an exhaust gas pre-cooler must be installed separately to consume pre-cooling water.

These all increase the energy consumption and maintenance cost of operation, resulting in the loss of the economic advantage of low cost in the seawater washing process

[0006] 3) It is bulky and can only be hung outside the cabin and engine room, and cannot realize online operation (OnLine)

[0007] Some technical solutions of this type have to add alkaline chemicals to the seawater washing system in order to improve the absorption effect. On the contrary, they lose the technical characteristics of only seawater and the advantages of being friendly to the marine ecological environment, resulting in rising environmental and economic costs, and the result becomes A process that is prohibited from being discharged by most sea areas and cannot be used

[0008] Existing technologies that have the above problems and shortcomings respectively or simultaneously have failed to become a practical process for replacing low-sulfur fuel oil, and have failed to perform safety, health and environmental protection functions such as extinguishing sparks, eliminating heat pollution and purifying smoke and dust.

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