Underground Coal Gasification Test System for Efficiency Measurement
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Solution Overview
Problem
Current underground coal gasification technologies lack effective methods to measure and optimize gasification efficiency and temperature changes during the process, making it difficult to determine conducive conditions for producing useful gases.
Innovation Solution
A test system comprising a gasifier connected to a gasification agent supply system, an outlet and recycling system, and a monitoring system, which includes a compressor, pressure vessel, PLC controller, and thermocouple, allows for varying gasification conditions and monitoring gas composition and content to determine optimal gasification efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If underground coal gasification is implemented to produce combustible gases, then energy utilization and hydrogen production are improved, but gasification efficiency and temperature control remain unmeasured and unoptimized
Solution Approach 1:
The gasifier is divided into multiple measurement sections with thermocouples positioned at different locations to monitor temperature distribution throughout the gasification zone. Gas composition is measured at multiple points using gas analysis instruments, allowing segmentation of the measurement process to identify optimal gasification conditions at different zones.
Solution Approach 2:
The monitoring system continuously measures temperature and gas composition, then feeds this data back to the control system. Based on the feedback, the system adjusts gasification parameters such as air supply rate and temperature to optimize gasification efficiency and maintain desired temperature profiles throughout the process.
2Use of energy by moving object
If coal resources are utilized for energy production, then energy supply is improved, but environmental pollution from CO2 emissions increases
Solution Approach 1:
The system changes gasification parameters including temperature, pressure, and gasification agent composition to optimize the chemical reactions. By controlling these parameters, the system maximizes hydrogen and useful gas production while minimizing CO2 emissions, transforming coal utilization from a pollution-intensive process to a cleaner energy production method.
Solution Approach 2:
The system converts the harmful CO2 emissions into beneficial products by capturing and utilizing the generated gases. The gasification process transforms coal carbon into synthesis gas that can be used for hydrogen production and chemical synthesis, converting what would be waste emissions into valuable energy resources.
3Quantity of substance
If natural gas resources are relied upon to meet market demand, then energy supply is improved, but resource scarcity and high costs increase
Solution Approach 1:
The system creates a copy of natural gas production by generating synthesis gas through coal gasification that mimics natural gas properties. This alternative energy source replicates the function of natural gas without depleting finite natural gas reserves, providing a sustainable substitute that can be produced from abundant coal resources.
Solution Approach 2:
The system changes the fundamental energy source parameter from natural gas to coal-based synthesis gas. By adjusting gasification parameters such as temperature and gasification agent composition, the system produces gas with properties suitable for replacing natural gas in energy applications, thereby diversifying energy supplies and reducing dependence on scarce natural gas resources.
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 system simulates underground coal gasification, monitors gasification products under different conditions, and calculates efficiency, enabling the identification of optimal conditions for improved resource utilization and addressing the contradiction between abundant coal and gas shortages.
Implementation Method 1
the compressor being connected to the pressure vessel for compressing air into the pressure vessel
Implementation Method 2
it indicating successful ignition if a temperature is displayed on a thermocouple
Implementation Method 3
Underground coal gasification (UCG) is the process of controlled combustion of underground coal to produce combustible gases by thermal and chemical action on the coal
Implementation Method 4
performing ignition using an ignition head and a small burner
Data Source
AI summary
The present disclosure provides a test system and a method for measuring efficiency of underground coal gasification, and relates to the technical field of underground coal gasification, comprising a gasification agent supply system, a gasifier, an outlet and recycling system and a monitoring system, wherein the gasification agent is mainly injected into the gasifier and then chemically reacts with the coal by igniting the gasifier at a high temperature to generate gas, while after the gas passes through the outlet and recycling system, the composition and content are measured, and the monitoring system monitors an operating state of the gasifier, injection of the gasification agent and production of gas, temperature change in the gasification channel and ignition temperature and pressure gauge data.