GB/T 42328-2023 (English Version)

Standard No.: GB/T 42328-2023
Language: Chinese, Available in English version
Release Date: 2023
Published By: General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
Latest: GB/T 42328-2023

Scope: Applicable to desulfurization devices for marine diesel engines, complying with regulations such as the MARPOL Convention

Introduction

1. Standard Overview and Background

GB/T 42328-2023 "Technical Requirements for Marine Diesel Engine Desulfurization Devices" is an important specification formulated to meet the increasingly stringent ship emission standards. This standard specifies the design, manufacturing, operation and maintenance requirements for wet desulfurization devices using sodium hydroxide (NaOH), magnesium hydroxide and magnesium oxide as desulfurization agents.

2. Comparison of Standard Frameworks

Standard Dimensions	GB/T 42328—2023	Annex VI of the MARPOL Convention	Resolution MEPC.340(77)
Scope of Application	Desulfurization Device for Marine Diesel Engines	International Ship Emission Control	Guidelines for Exhaust Gas Purification Systems
Core Requirements	Desulfurization Efficiency, Material Selection, Monitoring System	Sulfur Oxide Emission Limits	Scrubber Treatment and Emission Standards
Implementation Areas	Applicable worldwide, with enhancement in key areas	Outside and inside SO2 emission control areas	Waters around Bohai Sea, Pearl River Delta, Yangtze River Delta

3. Technical Requirements Interpretation

3.1 Design and Structure of Desulfurization Devices

Desulfurization devices are divided into three types according to their structural types: open, closed and hybrid. Open devices usually use seawater as scrubbing liquid, while closed devices need to recycle scrubbing liquid and regularly replenish desulfurizer. Hybrid desulfurization devices can flexibly switch modes according to operating requirements.

3.2 Technical Points of Scrubber Towers

Scrubber towers are the core components of desulfurization devices and must be equipped with reliable discharge facilities and liquid level monitoring systems. The layout of the spray system should take into account the risk of scaling and clogging, and be equipped with a gas-liquid separation device.

3.3 Emission limits and monitoring

According to the requirements of Table 1, the SO2 emission limits corresponding to different fuel sulfur contents must be strictly controlled. At the same time, the scrubber treatment device should meet the emission standards of Resolution MEPC.340(77).

4. Implementation recommendations

4.1 Technology selection

Select a suitable desulfurization device according to the ship type and operating environment.
Prioritize the use of high-efficiency and low-maintenance closed or hybrid systems.

4.2 Operation and maintenance

Regularly check the scrubber liquid level, temperature and pressure parameters.
Ensure the continuous supply of desulfurizer and the normal operation of the buffer tank.

4.3 Safety and Compliance

Strictly comply with national emission standards, conduct regular emission monitoring, and keep relevant records for inspection.

4.4 Continuous Optimization

Optimize desulfurization efficiency based on actual operation data, explore new desulfurization agents and washing liquid treatment technologies, and reduce operating costs.

GB/T 42328-2023 Referenced Document

GB/T 13306 Plates
GB/T 13384 General specifications for packing of mechanical and electrical product

GB/T 42328-2023 history

2023 GB/T 42328-2023 Technical requirements for marine diesel engine desulfurization device