Zero-energy-consumption seawater washing and purifying method and device for marine engineering engine tail gas

Abstract

The invention relates to a zero-energy-consumption seawater washing and purifying method and device for marine engineering engine tail gas. The method comprises the steps that washing seawater is subjected to heat energy recycling before being drained out of a washing and purifying system, and in the step of heat energy recycling, waste heat energy of the washing seawater is recycled and used as power energy of a seawater pump. According to the zero-energy-consumption seawater washing and purifying method and device for the marine engineering engine tail gas, the engine tail gas waste heat is recycled by the adoption of a gas-liquid-solid heat transfer manner, so that the heat recycling efficiency is higher; a proper low-temperature heat source utilization manner is adopted; the emission reduction efficiency is extremely high and the energy consumption is extremely low by the adoption of a seawater washing process; in this way, by the adoption of the zero-energy-consumption seawater washing and purifying method and device for the marine engineering engine tail gas, washing and purifying and waste heat energy recycling can be conducted on the engine tail gas at the same time, and the energy consumption of the seawater washing EGC system is equivalent to near-zero even a negative, so that a low-sulfur law is implemented by the adoption of a low-carbon manner for marine ships, and the ship energy efficiency index is not reduced or even can be increased.

Description

technical field [0001] The invention relates to a method and device for washing and purifying seawater of zero-energy marine engineering engine tail gas, which is suitable for after-treatment of exhaust gas discharged from marine engineering power facilities such as marine ships and marine platforms, and belongs to the technical field of marine engineering and clean energy. Background technique [0002] In recent years, the marine shipping industry has implemented the low-sulfur regulations produced by the United Nations Convention on the Prevention of Atmospheric Pollution from Ships, and there has been a contradiction between the general trend of improving energy efficiency and reducing carbon emissions: the area where mandatory low-sulfur regulations are implemented is increasing. If the replacement of low-sulfur fuel oil is adopted In this way, the oil refining industry has to refine a large amount of low-sulfur fuel oil and increase a large amount of carbon emissions; if...

AI Technical Summary

Problems solved by technology

[0002] In recent years, the marine shipping industry has implemented the low-sulfur regulations produced by the United Nations Convention on the Prevention of Atmospheric Pollution from Ships, and there has been a contradiction between the general trend of improving energy efficiency and reducing carbon emissions: the area where mandatory low-sulfur regulations are implemented is increasing. If the replacement of low-sulfur fuel oil is adopted In this way, the oil refining industry has to refine a large amount of low-sulfur fuel oil and increase a large amount of carbon emissions; if the exhaust gas cleaning (EGC) method is used to replace low-sulfur fuel oil, although the total energy consumption is not large, the increase in carbon emissions is much smaller than that of low-sulfur fuel oil. Oil refining industry, but because EGC energy consumption is a net increase for ships, it will cause users to worry about the ship's own energy efficiency index (EEDI)

On the other hand, the exhaust waste heat energy of marine internal combustion engines is about one-third of the heat energy of fuel, and the existing ship waste heat recovery boilers generally use inefficient gas-solid heat transfer methods, so the effect is minimal. How to improve the exhaust waste heat Recycling rates are also a long-sought-for problem

Images