Waste heat recovery device for marine diesel engine exhaust

A technology of waste heat recovery device and marine diesel engine, which is applied to steam engine devices, mechanical equipment, machines/engines, etc., can solve problems such as waste of flue gas energy, and achieve the effects of improving desulfurization efficiency, reducing pollution and saving water resources.

Active Publication Date: 2014-07-16
HARBIN ENG UNIV
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the pre-spray cooling device effectively reduces the exhaust gas temperature at the inlet of the desulfurization tower, thereby improving the desulfurization efficiency of the desulfurization tower, but this process causes a lot of waste of flue gas energy

Method used

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  • Waste heat recovery device for marine diesel engine exhaust

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Embodiment Construction

[0017] The present invention is described in more detail below in conjunction with accompanying drawing example:

[0018] to combine figure 1 , in the figure, the exhaust heat of the diesel engine is utilized successively through the waste heat boiler 3 and the corrosion-resistant plate-fin heat exchanger 13.

[0019] In the figure, the outlet of the booster fan 12 is connected to the three-way valve 2-4, the three-way valve 2-4 is connected to the thermal fluid inlet of the plate-fin heat exchanger 13, and the thermal fluid outlet of the plate-fin heat exchanger 13 is connected to the The three-way valve 2-5 is connected, the three-way valve 2-5 is connected with the exhaust gas inlet of the desulfurization tower 14, the three-way valve 2-4 is connected with the three-way valve 2-6, and the three-way valve 2-5 is connected with the three-way valve 2- 6 connections, the cold fluid inlet of the plate-fin heat exchanger 13 is connected to the outlet of the water pump 10-2, the ...

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Abstract

The invention provides a waste heat recovery device for marine diesel engine exhaust. The waste heat recovery device mainly comprises a marine diesel engine, a heat recovery boiler, a steam turbine generator set, a condenser, a corrosion-resistant plate-fin heat exchanger, a desulfurizing tower and the like. In the waste heat recovery device, the marine diesel engine exhaust passes through the heat recovery boiler to generate steam, part of steam is used for marine steam-consuming equipment, and the remaining steam is input to the steam turbine generator set to generate electric energy. In order to increase the waste heat recovery rate of the marine diesel engine exhaust and enhance the desulfurizing efficiency of the desulfurizing tower at the same time, the corrosion-resistant plate-fin heat exchanger is arranged between the heat recovery boiler and the desulfurizing tower so as to further lower the temperature of the exhaust. The waste heat recovery device can fully recover the waste heat of the marine diesel engine exhaust, so that the utilization range of the waste heat is enlarged, and the utilization efficiency of the waste heat is improved; in addition, low-temperature corrosion on the heated surface of the tail of the heat recovery boiler can be effectively relieved, the defects that in the prior art, energy saving is poor, environmental friendliness is poor, cost is high and reliability is poor are overcome, and the purposes of saving energy, being environmentally friendly, lowering cost and improving equipment reliability are achieved.

Description

technical field [0001] The invention relates to a marine diesel engine device, in particular to a marine diesel engine waste gas utilization device. Background technique [0002] Today's energy problem has become a top priority in economic development. Ships are means of transportation with huge energy consumption. On the one hand, high energy consumption increases the operating costs of ships, and on the other hand, it also brings serious environmental problems. [0003] The latest EEDI (Energy Efficiency Design Index, New Ship Energy Efficiency Design Index) rules formulated by the International Maritime Organization IMO have clear requirements for reducing emissions and reducing ship energy consumption. Ships with low energy utilization efficiency will not only face high fuel costs, but also face additional fines to compensate for the damage to the environment. Therefore, it is urgent to effectively reduce ship energy consumption and emissions. The equipment that uses f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01K27/02F01K11/00
Inventor 周松张贺付朱元清刘佃涛王治宇
Owner HARBIN ENG UNIV
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