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Ship tail gas purification device and process for strengthening SO2 absorption and oxidation through segmented temperature self-adaptive precise regulation and control

A technology of ship exhaust gas and segmented temperature, which is applied in gas treatment, separation method, dispersed particle separation, etc. Changes in flow and other problems, to reduce seawater consumption, achieve reuse, good self-adaptive effect

Pending Publication Date: 2020-12-08
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, ship engine models / capacities vary greatly, fuel oil has high sulfur content, operating conditions are complex, exhaust gas temperature and flow rate are variable, and seawater temperature / alkalinity in operating navigation areas varies greatly. How to achieve efficient purification of ship exhaust gas to achieve The most stringent emission limit requirement of the International Maritime Organization is an international problem that needs to be solved urgently

Method used

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  • Ship tail gas purification device and process for strengthening SO2 absorption and oxidation through segmented temperature self-adaptive precise regulation and control
  • Ship tail gas purification device and process for strengthening SO2 absorption and oxidation through segmented temperature self-adaptive precise regulation and control
  • Ship tail gas purification device and process for strengthening SO2 absorption and oxidation through segmented temperature self-adaptive precise regulation and control

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Experimental program
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Effect test

Embodiment 1

[0061] refer to Figure 1-7 , a step-by-step temperature self-adaptive and precise regulation of enhanced SO 2 An absorption-oxidation ship tail gas purification device, the device includes a ship tail gas purification system 1, a gas-liquid phase temperature control system 2, and a desulfurizer intelligent metering and distribution system 3, and the ship tail gas purification system 1 is respectively a gas-liquid phase temperature control system 2. The desulfurization agent intelligent metering and distribution system 3 is connected, and the gas-liquid phase temperature control system 2 is connected with the desulfurizing agent intelligent metering and distribution system 3; the ship tail gas purification system includes Venturi cooling tower 1-1, U-shaped soda Separation device 1-2, condensing dehumidification device 1-3, flue gas scrubber 1-4, liquid-liquid heat exchanger 1-5, circulation tank 1-6, desulfurizer preparation and storage system 1-7, seawater supply Systems 1-...

Embodiment 2

[0097] This embodiment takes a 10,000-ton ocean-going freighter as an example. The ocean-going freighter sails in a seawater high temperature area (30°C), the pH of the seawater is 7.8, the power of the fuel engine is 320kW, the fuel is III diesel, the exhaust gas temperature is 230°C, and the smoke volume is 3000m 3 / h,SO 2 The concentration is 1200μL / L (the design value is 1500μL / L), the Venturi cooling tower is equipped with 4 spray layers, and the flue gas scrubber is equipped with 3 spray layers, a flow equalization efficiency plate and a demister.

[0098] Its specific implementation process is:

[0099] The tail gas generated during the ship's navigation enters the Venturi cooling tower. Since the pH of seawater is 7.8, seawater is used as the desulfurizer, and the desulfurization efficiency of the system only reaches 94.5%, and the SO 2 The emission concentration is about 66μL / L, which does not meet the emission requirements. If magnesium oxide is used as a desulfuriz...

Embodiment 3

[0104]This embodiment takes a 10,000-ton ocean-going freighter as an example. The ocean-going freighter sails in a seawater high temperature area (40°C), the pH of the seawater is 7.5, the power of the fuel engine is 350kW, the fuel is III diesel, the exhaust gas temperature is 370°C, and the smoke volume is 3600m 3 / h,SO 2 The concentration is 1500μL / L (the design value is 1500μL / L), the Venturi cooling tower is equipped with 4 spray layers, the flue gas scrubber is equipped with 3 spray layers, a layer of flow equalization efficiency plate and a layer of demister.

[0105] Its specific implementation process is:

[0106] The tail gas generated during the ship's navigation enters the Venturi cooling tower. Since the pH of seawater is 7.5, seawater is used as the desulfurizer, and the desulfurization efficiency of the system only reaches 92.3%, and the SO 2 The emission concentration is about 115μL / L, which does not meet the emission requirements. If magnesium oxide is used a...

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Abstract

The invention relates to a ship tail gas purification device and process for strengthening SO2 absorption and oxidation through segmented temperature self-adaptive precise regulation and control. Theship tail gas purification device comprises a ship tail gas purification system and a gas-liquid phase temperature regulation and control system which are connected. The ship tail gas purification system comprises a venturi cooling tower, a U-shaped steam-water separation device, a condensation type dehumidification device, a flue gas washing tower, a liquid-liquid heat exchanger, a circulating tank, a desulfurizing agent preparation and storage system, a seawater supply system and a washing water treatment system. According to the invention, a process of coupling the venturi cooling tower with the flue gas washing tower is adopted, and rapid cooling is realized through turbulent flow reinforcement of venturi, so that on one hand, rapid washing removal of SO2 is realized, on the other hand, the condensation growth rate of SO3 is increased, the removal efficiency of SO3 is improved, and meanwhile, a basis can be provided for further removal of SO3 in the washing tower; meanwhile, the thermophoresis force between the washing liquid drops and the carbon black particles can be improved, the capture of the carbon black particles and PAH is remarkably enhanced, and the synergistic removal of SO2, SO3, carbon black, PAH and the like is realized.

Description

technical field [0001] The invention belongs to the technical field of ship tail gas pollutant control, in particular to a segmented temperature self-adaptive precision control enhanced SO 2 Absorption-oxidation ship tail gas purification device and process. Background technique [0002] my country is a major shipping and port country in the world, with 131,600 water transport ships, and seven of the world's top ten container ports are in China. With the research and development and application of pollutant emission technologies from stationary sources such as coal-fired power plants and mobile sources such as motor vehicles, significant progress has been made in the reduction of air pollutant emissions, and the issue of exhaust pollutant emissions from ships has become increasingly prominent. SO emissions from ships in my country in 2018 2 NOx and NOx reached 588,000 tons and 1,511,000 tons respectively (annual report of the Motor Vehicle Emission Monitoring Center of the...

Claims

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Application Information

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IPC IPC(8): B01D53/50B01D45/12B01D53/00F28D7/02F28F1/12
CPCB01D53/502B01D45/12B01D53/002F28D7/024F28F1/12B01D2258/0283B01D2251/402
Inventor 高翔郑成航刘少俊戴豪波朱松强沈海涛范海东李清毅张涌新苏秋凤岑可法
Owner ZHEJIANG UNIV
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