Liquid Slag Cache System Flow and Temperature Control
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Solution Overview
Problem
Current methods for treating blast furnace slag in the steel industry fail to effectively recover waste heat resources, leading to energy inefficiency and environmental pollution, and lack adequate flow control for stable granulation processes.
Innovation Solution
A second-level liquid slag cache system with flow and temperature monitoring and control functions, comprising a slag ladle casing, stopper, sizing nozzle, and sealing cover, which includes a stopper control mechanism to regulate slag flow and temperature, ensuring continuous and stable granulation by buffering, controlling flow, and compensating for heat fluctuations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If water slag method is used to cool slag, then slag cooling is achieved, but large amounts of water vapor, H2S and SO2 gas are released causing environmental pollution and wasting water resources
Solution Approach 1:
The invention converts the harmful high-temperature slag from an environmental pollutant into a beneficial resource by using it to heat water and generate steam for power generation. The slag's thermal energy is captured and utilized to drive a steam turbine, transforming waste heat into electrical energy while the slag is gradually cooled in a controlled manner without releasing harmful gases into the environment.
Solution Approach 2:
The invention introduces water and steam as intermediary substances between the hot slag and the power generation system. Water is injected into the slag to absorb heat and convert to steam, which then drives the turbine. This intermediary approach allows efficient heat transfer and energy conversion while containing the slag within a controlled structure, preventing direct release of harmful emissions.
2Loss of energy
If rotating cup granulation technology is used to recover heat, then high-temperature sensible heat recovery is achieved, but inadequate flow control affects continuous stable granulation
Solution Approach 1:
The invention implements a feedback control system where the flow rate of slag is continuously monitored and adjusted based on the operational requirements of the granulation process. Sensors detect parameters such as slag flow rate and temperature, and this information is fed back to control mechanisms that adjust the slag flow accordingly, ensuring stable and continuous granulation while maintaining efficient heat recovery.
Solution Approach 2:
The invention employs dynamic adjustable components in the slag flow control system, allowing the flow rate and distribution of slag to be continuously adjusted according to process conditions. This dynamic control enables the system to adapt to varying operational requirements, maintaining optimal granulation conditions and ensuring process reliability during heat recovery operations.
3Loss of substance
If existing slag treatment methods are used, then slag disposal is achieved, but waste heat resources are not recovered leading to energy inefficiency
Solution Approach 1:
The invention simultaneously achieves slag disposal and heat recovery by passing the slag through a water-cooled structure where heat is transferred to water. The slag is effectively disposed of as it is cooled and solidified, while the absorbed heat is recovered and used to generate steam for power generation. This dual approach transforms a waste disposal problem into an energy recovery opportunity, significantly improving overall energy efficiency.
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 system achieves stable and efficient granulation by regulating slag flow and temperature, prolonging equipment life, reducing energy consumption, and minimizing environmental impact through precise control and monitoring, thereby enabling the industrialization of liquid slag granulation.
Implementation Method 1
the stopper control mechanism is configured to control a flow area between the stopper head and the sizing nozzle
Implementation Method 2
a second-level liquid slag cache system with flow and temperature monitoring and control functions, which comprises: a slag ladle casing
Implementation Method 3
able to achieve liquid slag buffer, flow control and heat compensation
Data Source
AI summary
A second-level liquid slag cache system with flow and temperature monitoring and control functions is disclosed. A slag inlet is located at an upper portion of the slag ladle casing; at least one slag discharging unit is located at a side of a lower portion of the slag ladle casing; one slag discharging unit is corresponding to one stopper; the stopper includes a stopper head, a stopper rod and a stopper control mechanism; the stopper control mechanism is configured to control the flow area between the stopper head and the sizing nozzle; a sealing cover is disposed outside the sizing nozzle; a slag control tube is installed at a bottom of the sealing cover. The present invention is able to achieve liquid slag buffer, flow control and heat compensation, so as to allow liquid slag to continuously stably perform a subsequent granulation process.