Solid Adblue Ammonia Supply Device for SCR Systems
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Solution Overview
Problem
Traditional liquid urea-based SCR systems face issues with freezing and high water vapor content at low temperatures, leading to pipeline blockages and reduced exhaust gas purification efficiency.
Innovation Solution
A device that uses solid adblue stored in a heated urea tank with a thermal insulation system, a heating apparatus, and a controller to manage temperature and pressure, ensuring efficient sublimation and supply of ammonia for exhaust gas purification without freezing or excessive moisture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If liquid adblue is used for SCR system, then the system can reduce nitrogen oxides effectively, but the liquid adblue freezes at low temperature and causes pipeline blockages
Solution Approach 1:
The invention changes the physical state parameter of adblue from liquid to solid form. Solid adblue particles are fed into the SCR system where they sublime and decompose to release ammonia for nitrogen oxide reduction, eliminating freezing issues while maintaining purification effectiveness
Solution Approach 2:
The invention utilizes phase transition of solid adblue from solid state to gas state through sublimation in the high-temperature exhaust environment. This phase transition allows the solid particles to directly convert to ammonia gas for chemical reaction, bypassing the liquid phase that would freeze at low temperatures
2Ease of operation
If liquid adblue is stored and transported, then ammonia can be supplied to SCR system, but water vapor condenses and NH3 congeals on piping surfaces at low temperature
Solution Approach 1:
The invention changes the physical state of adblue from liquid to solid, which fundamentally alters the behavior of water vapor and ammonia in the system. Solid adblue particles do not produce condensable water vapor in the same way liquid adblue does, eliminating the congealation problem on piping surfaces
Solution Approach 2:
The invention extracts the harmful water vapor condensation and ammonia congealation issues from the system by using solid adblue particles instead of liquid adblue. The solid form bypasses the phase change issues that occur with liquid adblue in cold environments
3Reliability
If solid adblue is used instead of liquid adblue, then freezing and moisture issues are eliminated, but new device infrastructure is required
Solution Approach 1:
The invention merges the solid adblue storage, feeding, and sublimation functions into an integrated system that combines with existing SCR infrastructure. The solid adblue feeder integrates with the exhaust flow path, reducing the need for separate complex subsystems
Solution Approach 2:
The solid adblue system is designed to be compatible with existing SCR catalysts and exhaust processing infrastructure. The solid particles follow the same chemical reaction pathway as liquid adblue, allowing the system to serve multiple functions with minimal additional infrastructure
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
The device effectively prevents freezing and moisture-related issues, enhancing the SCR system's performance, reducing energy consumption, and maintaining vehicle performance while being easily integratable with existing infrastructure.
Implementation Method 1
a urea tank, used to store the solid adblue sublimed by heating
Implementation Method 2
an insulated shell is used for the urea tank; a thermal insulation interlayer arranged in the shell of the gasholder
Implementation Method 3
the second pipe heated electrically by heating elements and used to heat the solid adblue
Implementation Method 4
a first pipe for heating exhaust gas of the vehicle
Data Source
AI summary
A device for supplying ammonia with solid adblue includes a urea tank, a gasholder, a heating apparatus, a mixing mechanism, a one-way valve, a first temperature sensor, a second temperature sensor, a first baroceptor, a controller. The mixing mechanism includes a first pipe, second pipe a third pipe, and media. The device is easy to has the same temperature everywhere, and then the heat distribution of the urea tank can be evenly. Thus the effectiveness about the heating apparatus is elevated.