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Method and apparatus for desulfurizing exhaust gas of seagoing vessel

A desulfurization device and sea-going ship technology, applied in separation methods, chemical instruments and methods, dispersed particle separation, etc., can solve problems such as large pressure drop and resistance, large washing water volume and dilution water volume, high energy consumption and cost, and achieve reduction Nitrogen oxides, significant technical effect, particle reduction effect

Inactive Publication Date: 2008-12-03
WUHAN SAFE ENVIRONMENTAL PROJECT TECH INC
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] 2) At the same time, the scrubber uses a hollow fiber membrane contactor to realize the washing function, the pressure drop and resistance are very large, and a booster fan is added, and the energy consumption and cost of system operation are very high
[0016] 1) Under the current acceptable cost conditions, it is still difficult to meet the environmental requirements of flue gas discharge and seawater discharge; according to the current limited drainage requirements, the amount of washing water and dilution water consumed is large, and energy consumption and cost are high; in the future If the requirements for drainage conditions are further improved, the cost will further increase
[0017] 2) It is not suitable for the navigation and movement of ships. The environmental conditions and control conditions in different sea areas and different control areas are different. When seagoing ships sail between different sea areas and control areas, the environmental conditions are constantly changing, such as: Seawater quality, sulfur content of different batches of fuel oil, emission restrictions in different environments, etc., the flue gas desulfurization system with fixed process parameters will not be practically applied to seagoing ships
[0018]Obviously, if the above problems are not resolved, people's expectation of using marine resources to eliminate air pollution from ships will not be realized

Method used

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  • Method and apparatus for desulfurizing exhaust gas of seagoing vessel
  • Method and apparatus for desulfurizing exhaust gas of seagoing vessel
  • Method and apparatus for desulfurizing exhaust gas of seagoing vessel

Examples

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Effect test

Embodiment 1

[0061] Embodiment 1: as figure 1 As shown, it has a desulfurization controller. The steps of the sea-going ship exhaust gas desulfurization method of the present embodiment are as follows:

[0062] a. Washing: the exhaust containing SO from the ship engine 2 The high-temperature flue gas is washed after being cooled, and then the flue gas after washing and purification is discharged; the washing is to wash with seawater in the scrubber; b, transfer out acidic seawater: absorb the SO 2The acidic seawater formed is transferred from the scrubber to the water-saving acid remover; c, acid removal treatment: the acidic seawater entering the water-saving acid remover is mixed with alkaline seawater to make mixed seawater, and the mixed seawater Blowing into air; d, draining: discharge the seawater suitable for deacidification treatment to the sea area; washing with seawater in the scrubber in the washing step is to wash in a scrubber with a packing washing layer;

[0063] In orde...

Embodiment 2

[0067] Embodiment 2: as figure 2 As shown, the difference between this embodiment and Embodiment 1 is that the scrubber 3 has a parallel bypass smoke exhaust pipe, that is, the ship engine 1 and the scrubbing exhaust pipe 4 have a smoke exhaust pipe directly connected to it, which is convenient for switching the scrubber 3 . Desulfurization control is manually controlled.

[0068] The tonnage of the ship used in this example is relatively large, with a 60MW diesel engine installed, the exhaust gas temperature is 200-430°C, and the exhaust gas volume is about 310,100Nm 3 / h; implement the desulfurization method of the present invention, under the condition of fuel oil sulfur content 3%, reduce sulfur dioxide to desulfurization equivalent fuel oil sulfur content meet 1.5% of SECA control standard (2005), drainage pH ≥ 6.5, in different The amount of sea water consumed in the sea area is:

[0069] Baltic Sea Washing sea water volume 980m 3 / h Mixed seawater volume 3600m 3 / h...

Embodiment 3

[0073] like figure 1 , image 3 Shown is a sea-going ship smoke desulfurization device used in the method of the present invention. The high-temperature flue gas 3.2 introduced from the lower part of the scrubber 3 by the intake pipe 3.1 of the scrubber 3 is suitable for the implementation that the flue gas enters the scrubber vertically upwards. occasion. A kind of smoke desulfurization device for sea-going ships, which has a scrubber 3, a water-saving acid remover 10; the upper part of the scrubber 3 is a washing layer 3.3, which communicates with the washing seawater pump 5 through a pipeline; the lower part is a cooling layer 3.2; One end of the scrubber 3 communicates with the smoke exhaust pipe of the ship engine 1 through the washing intake pipe 2, and the other end is connected with the washing exhaust pipe 4; the lower part of the scrubber 3 communicates with the water-saving acid remover 10; the water-saving acid remover 10 is connected with the mixed seawater pum...

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Abstract

The invention relates to a method and a device for desulfurizing exhaust smoke of a sea-going ship, which uses sea water to reduce discharge of sulfur dioxide and other pollutants of the sea-going ship. The method comprises the following steps of: sea water scrubbing, acidic sea water transferring, acid separating treatment, water discharge and so on. The device comprises a scrubber and a water-saving acid separator, wherein, the upper part of the scrubber is provided with a scrubbing layer, and is communicated with a scrubbing sea water pump through a pipeline; the lower part of the scrubber is provided with a cooling layer; one end of the scrubber is communicated with a smoke exhaust pipe of a ship engine through a scrubbing inlet pipe, while the other end of the scrubber is connected with a scrubbing exhaust pipe; the lower part of the scrubber is communicated with the water-saving acid separator; and the water-saving acid separator is connected with a mixed sea water pump, a draught fan and a main discharge pipe for suitably discharging sea water which is subject to the acid separating treatment. The method and the device have the advantages of high desulfurizing efficiency, small sea water consumption, low equipment manufacturing cost and low running cost.

Description

technical field [0001] The invention relates to a method and device for desulfurizing smoke exhaust from sea-going ships, which uses seawater to remove pollutants such as sulfur dioxide discharged from marine ship engines, and belongs to the technical fields of atmospheric environment protection, marine resource development and utilization, and ship smoke pollution prevention and control. Background technique [0002] The problem of reducing sulfur dioxide emissions from sea-based ships has been continuously highlighted around the world, and relevant international legislation has gradually become stricter and improved. As the shipping industry that maintains the lifeline of the modern global economy, there are a large number of ships equipped with fuel engines. Relying entirely on low-sulfur fuels to reduce sulfur oxide emissions will lead to a significant increase in the economic cost of the shipping industry. Therefore, to provide ships with economical and practical emissio...

Claims

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Application Information

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IPC IPC(8): B01D53/78B01D53/50
Inventor 彭斯干
Owner WUHAN SAFE ENVIRONMENTAL PROJECT TECH INC
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