CHP Raw Gas Burner Integration for Cleaner Heat Recovery
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Solution Overview
Problem
Combined heat and power plants using gasification of carbonaceous materials face challenges in producing pure heat due to the need for excess synthesis gas to be burnt in flare burners, resulting in harmful emissions and inefficient energy utilization, as well as the requirement for separate exhaust gas ducts for the raw gas burner and internal combustion engine.
Innovation Solution
Integrating a raw gas burner with a heat exchanger that cools and cleans the synthesis gas, allowing the energy to be utilized for both heat production and electricity generation, while reducing emissions by using the same filtration unit for both applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If excess raw synthesis gas is burnt in a flare burner placed next to the gasifier, then the raw gas can be disposed of, but harmful emissions are formed and energy is wasted
Solution Approach 1:
The patent converts the harmful raw synthesis gas that was previously burnt in a flare burner into a useful fuel source by integrating a raw gas burner with the heat exchanger system. The raw gas is burnt in connection with the heat exchanger to produce heating medium, transforming the harmful emissions problem into a beneficial heat production process while recovering energy that would otherwise be wasted.
Solution Approach 2:
The patent merges the raw gas burner with the heat exchanger system, combining previously separate functions (raw gas disposal and heat production) into an integrated system. This allows the raw gas burner to utilize the heat exchanger's cooling medium circulation system, enabling simultaneous heat production and raw gas disposal through a unified technical solution.
2Ease of operation
If a separate flare burner system is used for raw gas disposal, then raw gas can be burnt, but additional exhaust gas ducts and system complexity are required
Solution Approach 1:
The patent makes the heat exchanger system multi-functional by integrating the raw gas burner with it. The heat exchanger now serves dual purposes: cooling the raw synthesis gas for internal combustion engine use and providing a heat production pathway through the integrated raw gas burner. This eliminates the need for separate exhaust gas ducts for the raw gas burner, as it utilizes the existing heat exchanger infrastructure.
Solution Approach 2:
The patent combines the raw gas burner system with the heat exchanger system, merging previously separate components into a unified system. This integration reduces the number of required exhaust gas ducts by utilizing the heat exchanger's existing gas flow paths and cooling medium circulation system for both heat production and raw gas disposal functions.
3Power
If raw synthesis gas is cooled in a heat exchanger for internal combustion engine use, then electricity can be generated, but pure heat production is not possible
Solution Approach 1:
The patent introduces dynamic flexibility to the system by enabling it to operate in multiple modes. The system can switch between producing cooled raw synthesis gas for internal combustion engine use (electricity generation mode) and burning raw gas in the integrated raw gas burner for pure heat production (heat production mode). This dynamic adaptability allows the CHP plant to respond to varying energy demands and market conditions.
Solution Approach 2:
The patent makes the heat exchanger system multi-functional by integrating the raw gas burner with it. The heat exchanger now serves dual purposes: cooling the raw synthesis gas for internal combustion engine use and providing a heat production pathway through the integrated raw gas burner. This enables the system to produce both electricity and pure heat, enhancing its versatility and adaptability to different operational requirements.
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 enhances energy utilization from carbonaceous materials by enabling pure heat production and reduces harmful emissions by cleaning exhaust gases, improving the overall efficiency of the combined heat and power plant.
Implementation Method 1
the temperature of the hot raw gas is reduced in a heat exchanger
Implementation Method 2
a burner being arranged to burn the raw gas produced in the gasifier
Data Source
AI summary
A combined heat and power plant includes a gasifier, a heat exchanger arranged to reduce the temperature of the raw synthesis gas formed in the gasifier by exchanging the heat of the raw synthesis gas into heating medium used for heating and forming cooled raw synthesis gas, a filtration unit for cleaning the cooled raw synthesis gas to form refined synthesis gas suitable as a fuel for an internal combustion engine, an internal combustion engine where the refined synthesis gas is burnt to produce mechanical power, ducts for connecting different parts of the plant to each other a raw gas burner arranged after the gasifier to burn the raw synthesis gas formed in the gasifier during the time when the refined synthesis gas is not utilized in the internal combustion engine. A method for treating raw synthesis gas a combined heat and power plant is also disclosed.