Safety control method at urgent fault time of power supply of TRT (Top gas pressure Recovery Turbine) set automatic control system
An automatic control system and emergency failure technology, which is applied in the direction of engine starting, mechanical equipment, engine components, etc., can solve the problems of automatic control system control and monitoring function failure, affecting the safe production of blast furnaces, and threatening the safety of TRT units, etc.
Active Publication Date: 2014-07-02
XIAN SHAANGU POWER
View PDF6 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
During the normal operation of the existing TRT unit, the top pressure of the blast furnace (referred to as blast furnace top pressure) is controlled by the automatic control system of the TRT unit (referred to as the automatic control system). Control requirements, however, when the power supply of the automatic control system of the TRT unit may have the following four emergency failures: 220VAC main power failure, 24VDC main power failure, PLC system power module failure or abnormal tripping of the power supply circuit breaker, any of the above power failures occurs At any time, it will cause the control and monitoring function of the automatic control system to fail, the computer at the operation station will be powered off, and the stator blades of the gas turbine expander will all be closed. The adjustment of the top pressure of the blast furnace will fail, resulting in a rapid rise in the top pressure of the blast furnace, which will affect the safety of the blast furnace. Production, at this time, if the high-voltage (10KV) system of the electrical system operates normally, the generator does not automatically disconnect from the grid, but runs completely without the monitoring of the control system, this situation will greatly threaten the entire Safety of TRT units
[0003] But at present, there is no effective method to solve the problem of stable control of the blast furnace top pressure and safe shutdown of the TRT unit when the power supply of the automatic control system of the TRT unit fails in an emergency
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0031] refer to figure 1 , the safety control method when the TRT unit automatic control system power supply emergency failure of the present invention, the TRT unit system applied by the method is set as follows:
[0032] The blast furnace gas produced by the blast furnace 201 enters the dust collector 202, and the outlet gas pipeline of the dust collector 202 is divided into two paths: the output ends of the two gas pipelines are respectively connected to the parallel pressure reducing valve group system 203 and the TRT unit system; the TRT unit The system includes a quick-cut valve 206, a bypass valve group, a turbo expander 204, and a generator 205. The bypass valve group includes a single-acting bypass quick-opening valve 207 and a double-acting bypass quick-opening valve 208 connected in parallel, wherein, The gas pipeline is respectively connected to the bypass valve group and the quick-cut valve 206, and the inlet of the bypass valve group is connected to the inlet pip...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a safety control method at urgent fault time of a power supply of a TRT (Top gas pressure Recovery Turbine) set automatic control system. When the set normally operates, the top pressure of a blast furnace is controlled by an automatic control system; in the set operation process, if the urgent fault of the power supply of the automatic control system occurs, the safety control is carried out by the set; when the set safely shuts down, after the top pressure of the blast furnace is controlled and stabilized by a pressure relief valve group, the power supply fault reason of the automatic control system is examined by detecting personnel, if the automatic control system can be restored within short time, single-action bypath quick-opening valves are gradually closed by the restored automatic control system; and otherwise, the valves are gradually closed by the field manual devices of the single-action bypath quick-opening valves. According to the method, the severe influence of the set on the top pressure of the blast furnace at the power supply urgent fault time of the automatic control system is effectively avoided, thus the production safety of blast-furnace smelting and the safe shutdown of the TRT set are guaranteed. At present, according to operation field verification, the safety control method disclosed by the invention has better effect and the safety of the blast furnace system and the TRT set are greatly improved.
Description
technical field [0001] The invention belongs to the field of blast furnace gas residual pressure energy recovery devices, and relates to a safety control method, in particular to a safety control method when a power supply of an automatic control system of a TRT unit fails in an emergency. Background technique [0002] Blast furnace smelting is the pillar of the iron and steel industry. Blast furnace gas residual pressure energy recovery device (TRT unit for short) is a major energy-saving equipment for blast furnace smelting. With the rapid development of industrial control technology, the safety requirements for equipment are constantly improving. At the same time, TRT unit As an auxiliary equipment of the blast furnace, its operation should not interfere with the normal production of the blast furnace, but also maximize power generation. During the normal operation of the existing TRT unit, the top pressure of the blast furnace (referred to as blast furnace top pressure) ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): F01D19/00F01D17/00F01D17/10F01D17/26
Inventor 张亚军叶长青王航张保平柳黎光王东升张武军刘宁边山成
Owner XIAN SHAANGU POWER