Advanced treatment and recycling device for ship tail gas desulfurization washing wastewater

A ship tail gas and advanced treatment technology, applied in water/sewage treatment, special compound water treatment, light water/sewage treatment, etc., can solve problems such as low efficiency, incomplete removal of pollutants, large sludge production, etc.

Pending Publication Date: 2021-06-08
SHANGHAI MARITIME UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The purpose of the present invention is to provide an advanced treatment and reuse device for ship tail gas desulfurization and washing wastewater, so as to solve the

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  • Advanced treatment and recycling device for ship tail gas desulfurization washing wastewater

Examples

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Example Embodiment

[0049] Example 1

[0050] The ship engine of the applicable vessel 4 is Wartsila-Sulzer RT Fiex50 low-speed diesel engine, total exhaust amount is 4 × 10 4 Nm 3 / h, the flow rate of the lift pump 21 is 0-80m 3 / h, the initial temperature of the flue gas is 300 ° C, SO 2 The initial concentration is about 500mg / nm 3 . Using magnesium-based seawater method to desulfurize the resulting flue gas, the washing water contains 1% concentration Mg (OH) 2 This closed-circuit ship exhaust mean washing system is turned on for 2 h, and the exhaust gas desulfurization water in the initial washing water storage tank 1 is 2.7M. 3 . The second reflow pump 521 flow is 7.5 L / min, the wastewater processor 523 reaction cavity is 0.2m 3 The 50 strong power is 54W, an ultraviolet lamp having 254 nm is released in the medium spacing of the reactor, uniformly arranged in parallel, and the ultrasound component processing frequency is 20 kHz. It has a total of 0.9m 3 The washing water was treated with...

Example Embodiment

[0051] Example 2

[0052] Applicable ship engine is a MAN 6S35MC low-speed diesel engine, when the machine load is 50%, the total exhaust amount of the ship engine 4 is 28,000 kg / h, and the fuel used is 3.5% marine fuel, which is maintained at the retardation of the ship. 3 desulfurization Under the conditions of 99% or more, the mass fraction is 20% a sodium hydroxide solution 50L, that is, 50 L of desulfurization exhaust gas to remove the desulfurization, the closed-circuit ship exhaust gas release system is turned on for 1 h. The desulfurization exhaust gas washing water in the initial washing water storage tank 1 was 0.5m 3 . The second reflow pump 521 flow is 5 L / min, the wastewater processor 523 reaction cavity is 0.5m 3 The 100 strong power is 38W, and the transmit band is 254 nm and 185 nm ultraviolet lamps arranged in the neutral spacing of the reactor, and the sponge-shaped zinc oxide loaded catalyst is uniformly arranged in parallel, and the ultrasound component pro...

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Abstract

The invention discloses an advanced treatment and recycling device for ship tail gas desulfurization washing wastewater. The device comprises a washing water storage tank, a washing water circulation pipeline, a filter and a wastewater treatment device, wherein the washing water storage tank is connected with a washing tower; one end of the washing water circulation pipeline is connected with the bottom outlet of the washing tower, and the other end is divided into a first circulation pipeline and a second circulation pipeline; the wastewater treatment device comprises an ultrasonic assembly, a photocatalysis assembly and an ultrafiltration assembly; the first circulation pipeline is connected with the washing water storage tank to form a first circulation system; and the second circulation pipeline is sequentially communicated with the filter, the wastewater treater and the washing water storage tank to form a second circulation system. According to the device, washing wastewater is treated by adopting a filtering and ultrasonic coupling multi-phase photocatalytic oxidation reaction technology, so that pollutants in the wastewater can be efficiently and thoroughly removed, and the cyclic utilization rate of washing water is also improved; and meanwhile, no chemicals are introduced for treating the washing wastewater, so that the negative influence on the ecological environment is small.

Description

technical field [0001] The invention belongs to the technical field of ship tail gas desulfurization washing wastewater treatment, in particular to an advanced treatment and reuse device for ship tail gas desulfurization washing wastewater. Background technique [0002] With the rapid development of the global economy and shipping logistics, exhaust emissions from ships have gradually become one of the main pollution sources affecting the global atmosphere and oceans. On July 1, 2010, the International Maritime Organization (IMO) officially entered into force through Annex VI of the International Convention for the Prevention of Pollution from Ships (also known as the MARPOL Convention). ) imposed increasingly stringent regulations. Since 2012, it is the first goal of IMO to reduce the SOx emission concentration of ocean-going ships operating on the high seas by 50%. After that, the emission reduction indicators will be revised and upgraded every 5 years. In 2020, the regul...

Claims

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Application Information

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IPC IPC(8): C02F9/08B01D53/50C02F1/32C02F1/36C02F1/72C02F101/10C02F101/32
CPCC02F9/00B01D53/501C02F2305/10C02F1/36C02F1/725C02F1/32C02F2101/32C02F2101/327C02F2101/101
Inventor 张丽杨懿张文婷
Owner SHANGHAI MARITIME UNIVERSITY
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