Blast control method and control system for double reheat steam turbine
A technology of secondary reheating and control methods, applied in mechanical equipment, engine components, machines/engines, etc., can solve problems affecting the service life of the unit, overheating of blades, etc., and achieve the effect of real-time adjustment and avoid overheating
Active Publication Date: 2019-08-23
SHANGHAI ELECTRIC POWER GENERATION EQUIPMENT CO LTD
View PDF6 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
If the control is not good, the last few stages of blades may overheat, seriously affecting the service life of the unit
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
[0039] The implementation of the present invention will be illustrated by specific specific examples below, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.
[0040] see Figure 1 to Figure 3. It should be noted that the structures, proportions, sizes, etc. shown in the drawings attached to this specification are only used to match the content disclosed in the specification, for those who are familiar with this technology to understand and read, and are not used to limit the implementation of the present invention. Limiting conditions, so there is no technical substantive meaning, any modification of structure, change of proportional relationship or adjustment of size, without affecting the effect and purpose of the present invention, should still fall within the scope of the present invention. within the scope covered by the disclosed technical content. At the same tim...
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 provides a secondary reheating turbine air blasting control method and system. The control method comprises the following steps: establishing a first temperature graph according to the relationship between the rotor temperature of an ultrahigh pressure cylinder and the exhaust steam temperature of the ultrahigh pressure cylinder, and establishing a second temperature graph according to the relationship between the rotor temperature of a high pressure cylinder and the exhaust steam temperature of the high pressure cylinder; acquiring the rotor temperature of the ultrahigh pressure cylinder, the exhaust steam temperature of the ultrahigh pressure cylinder, the rotor temperature of the high pressure cylinder and the exhaust steam temperature of the high pressure cylinder in real time, and corresponding the real-time acquired temperature values relevant to the ultrahigh pressure cylinder to the first temperature graph, and corresponding the real-time acquired temperature values relevant to the high pressure cylinder to the second temperature graph; and according to the relationship between the real-time acquired temperature values and a limiting value curve, determining to adjust a medium-pressure adjusting steam valve, an ultrahigh pressure adjusting steam valve and a high pressure adjusting steam valve and judging whether to turn off the ultrahigh pressure cylinder and the high pressure cylinder. With adoption of the method and system, the last stage blade of each cylinder can be prevented from overtemperature.
Description
technical field [0001] The invention relates to the technical field of exhaust steam temperature control in a double reheat steam turbine, in particular to a method and a control system for controlling the blast of a double reheat steam turbine. Background technique [0002] A steam turbine is a rotating device that rotates at high speed under the impulse of high-temperature and high-pressure steam. When the unit speeds up to the warm-up speed, the rated speed or the load of the generator is low, and the steam intake of the steam turbine is small, the blades on the rotor rotate with it at high speed. When the surrounding air is stirred, a large amount of mechanical energy is quickly converted into heat energy, which heats the air and metal inside the cylinder, causing the temperature of the rotor and metal in the cylinder to rise sharply. The blades are exposed to particularly high temperature gradients during blowing of the steam turbine. The steam flow is backflowed under...
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): F01D17/10
CPCF01D17/10
Inventor 包锦华黄勇李刚
Owner SHANGHAI ELECTRIC POWER GENERATION EQUIPMENT CO LTD