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

AI Technical Summary

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 incomplete removal of pollutants and low efficiency, large sludge output, high energy consumption and recycling of washing water in the prior art Low rate and other issues

Method used

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

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Effect test

Embodiment 1

[0050] The marine engine 4 of the applicable ship is a WARTSILA-SULZER RT fiex50 low-speed diesel engine with a total smoke emission of 4×10 4 N M 3 / h, the flow rate of lift pump 21 is 0-80m 3 / h, the initial temperature of flue gas is 300℃, SO 2 The initial concentration is about 500mg / Nm 3 . The generated flue gas is desulfurized and washed using the magnesium-based seawater method, and the washing water contains 1% concentration of Mg(OH) 2 , the closed-circuit marine tail gas desulfurization washing system was started for 2 hours, and the tail gas desulfurization washing water in the initial washing water storage tank 1 was 2.7m 3 . The flow rate of the second backflow pump 521 is 7.5L / min, and the volume of the reaction chamber of the waste water processor 523 is 0.2m 3 , 50 UV lamps with a power of 54w and an emission band of 254nm are arranged at equal intervals in the reactor, the network-like nitrogen-doped titanium dioxide supported catalyst is evenly arranged...

Embodiment 2

[0052] The applicable ship engine is a MAN 6S35MC low-speed diesel engine. When the engine load is 50%, the total smoke emission of the ship engine 4 is 28000kg / h, and the fuel used is high-sulfur 3.5% marine fuel oil. Under the condition that the efficiency is above 99%, it needs to consume 50L of sodium hydroxide solution with a mass fraction of 20% per hour, that is, 50L of desulfurization tail gas washing water loses the effect of desulfurization. The total amount of desulfurization tail gas washing water in the initial washing water storage tank 1 is 0.5m 3 . The flow rate of the second reflux pump 521 is 5L / min, and the volume of the reaction chamber of the waste water processor 523 is 0.5m 3 , 100 UV lamps with a power of 38w and emission bands of 254nm and 185nm are arranged at equal intervals in the reactor, and the spongy zinc oxide-supported catalyst is evenly arranged in parallel with the UV lamps, and the processing frequency of the ultrasonic components is 20kHz...

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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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