Modular SCR Module for Engine NOx Reduction
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Solution Overview
Problem
Current SCR systems for reciprocating piston internal combustion engines with varying outputs require complex and expensive devices for nitrogen oxide reduction, leading to increased production costs and assembly complexities due to the need for different configurations to manage varying exhaust gas volume flows.
Innovation Solution
An SCR module with a housing, exhaust gas section, and integrated delivery devices for ammonia or urea solution injection, allowing for simple and cost-effective installation by connecting only an exhaust line and reducing agent line, with identical modules used in parallel to adapt to different engine outputs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If different SCR devices are provided for reciprocating piston internal combustion engines having varying outputs, then the nitrogen oxide reduction effectiveness is improved, but the device complexity and production costs increase
Solution Approach 1:
The patent applies universality by designing a single standardized SCR module that can serve multiple engine types with varying outputs. The module is equipped with multiple injection nozzles (first, second, and third injection nozzles) that can be activated selectively based on engine requirements, allowing one device to fulfill multiple function levels.
Solution Approach 2:
The SCR device is segmented into multiple independent injection nozzles (first injection nozzle, second injection nozzle, third injection nozzle) that can operate independently or in combination. This segmentation allows the system to provide different levels of nitrogen oxide reduction capability while using a single modular device structure.
2Reliability
If different SCR devices are provided for reciprocating piston internal combustion engines having varying outputs, then the nitrogen oxide reduction effectiveness is improved, but the production costs increase
Solution Approach 1:
The patent applies universality by designing a single standardized SCR module that can serve multiple engine types with varying outputs. The module is equipped with multiple injection nozzles (first, second, and third injection nozzles) that can be activated selectively based on engine requirements, allowing one device to fulfill multiple function levels.
Solution Approach 2:
The patent applies parameter changes by varying the operational state of different injection nozzles rather than changing the physical device structure. The control system can activate different combinations of injection nozzles (first only, first and second, all three) to adapt to different engine output levels, maintaining cost-effective standardized manufacturing.
3Reliability
If different SCR devices are provided for reciprocating piston internal combustion engines having varying outputs, then the nitrogen oxide reduction effectiveness is improved, but the assembly efforts and error susceptibility increase
Solution Approach 1:
The patent applies universality by designing a single standardized SCR module that can serve multiple engine types with varying outputs. The module is equipped with multiple injection nozzles (first, second, and third injection nozzles) that can be activated selectively based on engine requirements, allowing one device to fulfill multiple function levels.
Solution Approach 2:
The SCR device is segmented into multiple independent injection nozzles (first injection nozzle, second injection nozzle, third injection nozzle) that can operate independently or in combination. This segmentation allows the system to provide different levels of nitrogen oxide reduction capability while using a single modular device structure.
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
This solution simplifies the installation and production of SCR systems by using identical modules connected in parallel, reducing production costs and assembly complexity, while effectively reducing nitrogen oxide emissions across a range of engine outputs from 600 to 4000 kW.
Implementation Method 1
selectively reduce the nitrogen oxides in the exhaust gases by means of a selective catalytic reaction (SCR) on an SCR catalytic converter
Implementation Method 2
at least one delivery device for feeding the reducing agent to the injection element at a predetermined pressure
Data Source
AI summary
Reciprocating-piston internal combustion engines having different power outputs are to be equipped simply, reliably and inexpensively with a device for the selective catalytic reduction of the exhaust gases having an SCR module for a reciprocating-piston internal combustion engine, comprising a housing and/or a frame, an exhaust-gas section which delimits a flow duct for guiding through exhaust gas, having an inlet opening for introducing the exhaust gas and an outlet opening for discharging the exhaust gas, an SCR catalytic converter which is arranged inside the flow duct, at least one injection element for adding a reducing agent, for example ammonia or a urea solution, to the exhaust gas which is guided through the flow duct. This problem is solved by virtue of the fact that the SCR module comprises at least one delivery device (13) for feeding the reducing agent to the injection element at a predetermined pressure.