316L Stainless Steel Marine Desulfurization Tower

Product Overview

The 316L stainless steel marine desulfurization tower is a wet scrubbing vessel used to remove sulfur dioxide, acid mist and other acidic pollutants from marine engine or boiler exhaust gas. It is also called a marine scrubber tower, ship desulfurization tower, marine EGCS scrubber, exhaust gas washing tower or wet desulfurization tower.

Exhaust gas enters the tower and flows upward through the spray and demister section. Seawater or alkaline washing liquid is sprayed from the top, forming a liquid film that absorbs SOx and acidic components. The purified gas passes through a demister before discharge, while the washing liquid is collected, treated and reused or discharged according to system design.

316L stainless steel contains molybdenum, which provides better resistance to chloride ions and wet corrosive environments than 304 stainless steel. This makes it suitable for marine exhaust gas conditions where seawater, acid mist, high humidity and long-term wet corrosion are present.

Why 316L Stainless Steel for Marine Desulfurization

Marine desulfurization towers operate under demanding conditions, including high-temperature exhaust gas, seawater or alkaline washing liquid, acid condensate and chloride-containing media. 316L stainless steel is widely used in marine and chemical equipment because of its good balance between corrosion resistance, weldability, structural strength and fabrication reliability.

Compared with 304 stainless steel, 316L offers improved resistance to chloride-induced pitting and crevice corrosion. Its low carbon content also helps reduce carbide precipitation during welding, which supports better corrosion performance in welded structures such as scrubber shells, spray sections and circulation components.

Structure & Working Principle

The marine desulfurization tower is a vertical cylindrical vessel made of 316L stainless steel, with gas inlet, gas outlet, inspection door, drain connection and supporting structure. Exhaust gas flows through the tower while washing liquid is circulated by a pump and sprayed through nozzles.

Inside the tower, the spray section increases gas-liquid contact area and improves absorption efficiency for SO₂ and acidic gases. The demister section removes entrained droplets from purified gas to reduce carryover and downstream corrosion. The circulation system collects washing liquid for reuse, with optional pH monitoring and dosing system to maintain stable neutralization performance.

Material Selection Guidance

316L stainless steel is suitable for marine desulfurization towers and related wet scrubbing equipment where chloride content and wet corrosion are moderate. It provides better performance than 304 in seawater-containing, acid mist and high-humidity environments.

For more severe chloride corrosion, closed-loop circulation with high salt accumulation, or long service life requirements, 2205 duplex stainless steel, 254SMO or other high-alloy materials may be considered. Material selection should be based on exhaust gas composition, washing liquid type, chloride concentration, temperature, operating mode and expected service life.

Typical Specifications

The tower is manufactured from 316L stainless steel, with vertical marine scrubber or desulfurization tower configuration. Diameter and height are customized according to engine exhaust gas volume, SOx load, space layout and installation conditions. Wall thickness is designed according to diameter, structural load, temperature and process requirements.

Internal parts include spray nozzles, demister, circulation pump, piping, inspection ports and supporting structures. Exact dimensions, number of spray layers and connection configuration should be determined according to gas volume, pollutant concentration, temperature, humidity and marine installation conditions.

Typical Applications

316L stainless steel marine desulfurization towers can be used in ship exhaust gas treatment, marine boiler flue gas desulfurization, marine EGCS scrubber systems, offshore platform exhaust gas washing, and industrial flue gas desulfurization with seawater or alkaline washing liquid. They can also be integrated with spray systems, demisters, circulation tanks, water treatment units and downstream polishing equipment.

Manufacturing & Company Strength

Wuxi Xinchangyuan Equipment Manufacturing Co., Ltd. specializes in the design and manufacture of stainless steel absorption towers, spray towers, scrubber towers, wet electrostatic precipitators, anode modules and anode tube bundles. Our facility is equipped with plate rolling, laser cutting, CNC forming, automatic welding, surface treatment and module assembly capabilities, supporting both standard and customized stainless steel process equipment.

We provide engineering support from material selection and structural design to fabrication, assembly and installation guidance. Each tower is manufactured according to project gas composition, temperature, corrosion level and site layout. Our team can integrate desulfurization towers with wet electrostatic precipitators, demisters, circulation systems and exhaust gas purification lines, helping industrial and marine customers achieve stable emission performance and reliable long-term operation.

FAQ

What is a 316L stainless steel marine desulfurization tower used for?
It is used to remove sulfur dioxide, acid mist and other acidic pollutants from marine or industrial exhaust gas through wet scrubbing and chemical absorption.

Why choose 316L instead of 304 for marine desulfurization?
316L contains molybdenum and provides better resistance to chloride ions, acid mist and wet corrosive environments. It is more suitable for seawater-containing and high-humidity scrubbing conditions.

Can the marine desulfurization tower be customized?
Yes. Tower diameter, height, wall thickness, spray layers, demister and circulation system can be customized according to actual process conditions.

Can it be used together with a WESP system?
Yes. A desulfurization tower can be arranged upstream of a WESP to reduce SOx, acid mist, dust and moisture load, helping the downstream polishing system operate more stably.

Tel：+86 13656199922

Phone：+86 13656199922

Email：wxxcysbzzyxgs@163.com

Address：35-3 Yanqiao Road, Yanqiao Street, Huishan District, Wuxi City, Jiangsu Province, China