Containerized Emission Control for At-Berth Auxiliary Diesels
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Solution Overview
Problem
Current options for reducing emissions from auxiliary diesel engines on ocean-going ships at-berth are cumbersome, expensive, or unavailable, leading to non-compliance with regulations and hindering ship docking at regulated ports.
Innovation Solution
An emissions control system housed within a standard shipping container size that connects between the diesel engine exhaust and the ship's stacks, using dampers to control exhaust flow, and employs dry sorbent and aqueous ammonia injection followed by ceramic filters with embedded catalysts to treat exhaust gases, achieving regulatory compliance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If shore power connections are used to reduce emissions, then emission reductions are achieved, but the system becomes cumbersome and expensive
Solution Approach 1:
The emission control system is divided into separate functional modules including scrubbers, filters, and catalytic converters that can be independently installed and maintained on the auxiliary diesel engine exhaust stream, avoiding the need for complex shore power infrastructure
Solution Approach 2:
A dry sorbent injection system serves as an intermediary substance that chemically reacts with harmful emissions in the exhaust gas, neutralizing pollutants without requiring direct connection to external shore power facilities
2Productivity
If auxiliary diesel engines operate at-berth, then ships can remain operational, but emissions increase
Solution Approach 1:
The system changes the chemical parameters of exhaust gas by injecting aqueous ammonia to convert NOx into less harmful substances, and uses ceramic filters to change the physical composition by capturing particulate matter, allowing continued engine operation with reduced emissions
Solution Approach 2:
The emission control system employs composite material structures including ceramic filters with embedded catalysts and multi-layer scrubber media that combine multiple functions in single components, effectively reducing various types of emissions while maintaining engine operation
3Object-generated harmful factors
If emission control systems are installed for regulatory compliance, then emission reductions are achieved, but installation and maintenance become difficult
Solution Approach 1:
The emission control system is designed as modular units that can be independently installed on auxiliary diesel engines and easily removed or maintained without affecting ship operations, with each module handling specific emission control functions
Solution Approach 2:
The system includes self-monitoring capabilities and automated control mechanisms that reduce the need for manual intervention during operation and maintenance, allowing crew members to perform basic maintenance tasks without specialized expertise
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Facilitates compliance with emission regulations by effectively reducing emissions from auxiliary diesel engines, allowing ships to operate economically and environmentally friendly, even without shore power, and enabling seamless installation and removal.
Implementation Method 1
employs dry sorbent and aqueous ammonia injection followed by ceramic filters with embedded catalysts to treat exhaust gases
Implementation Method 2
employs dry sorbent and aqueous ammonia injection followed by ceramic filters with embedded catalysts to treat exhaust gases
Implementation Method 3
using dampers to control exhaust flow
Data Source
AI summary
An emission control system is provided for diesel engines operated on ocean-going ships at-berth that may be easily installed and removed from on ocean-going ships (or vessels) while at-berth. The emission control system is arranged within a housing sized to fit within space allocated for standard shipping containers. The emission control system has an inlet for receiving exhaust from a ships engine, cleans the exhaust and then passes the exhaust through an exhaust outlet connected to the ships stacks.