General characteristic curve surge control method and system based on similar principle
A surge control and characteristic curve technology, applied in the field of general characteristic curve coordinate system, can solve the problems of increased control uncertainty factors, actual deviation, energy waste, etc., to reduce energy loss, avoid surge damage, and be more applicable sexual effect
Active Publication Date: 2018-01-19
HANGZHOU HOLLYSYS AUTOMATION
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Problems solved by technology
[0008] 1) In the start-up stage and normal production stage, no matter how the inlet pressure, inlet temperature, and molecular weight change, the shape and position of the surge limit line and surge control line are always fixed, which deviates from the actual situation, making the control uncertainty factors Increase
[0009] 2) It cannot effectively compensate the influence of changes in inlet pressure, inlet temperature, and molecular weight on the surge limit line, surge control line, and operating point
[0011] 4) Many on-site valves are backflowed or vented for a long time, resulting in huge waste of energy
Method used
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[0040] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.
[0041] see figure 1 , among the turbine compressors, the turbine 101 (the present invention takes steam turbine drive as an example, and the gas turbine and motor drive methods will not be described again) drives the compressor 102 to rotate, compresses and transports the gas from the gas source 106 to the user 107, and the gas Through the inlet pipeline 103 , enter the compressor 102 through the flow throttling element 104 , leave the compressor 102 to the user 107 through the discharge pipeline 105 , and part of the gas flows back to the gas source 106 through the anti-surge valve 130 .
[0042] figure 1 Also shown is the control system 12 of the turbocompressor (including measurement sensors). The measurement sensors include a speed sensor 116, an inlet guide vane position sensor 117, an inlet pressure sensor 110, an exhaust pressure sensor 111, a...
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The present invention discloses a general characteristic curve surge control method and system based on a principle of similitude. The general characteristic curve is represented by dimensionless combined parameters obtained by combining according to the principle of similitude, and used as a surge limit line; a distance between an operating point of a compressor and a surge area is calculated accurately to avoid the risk of the unit entering the surge area and reducing energy losses caused by evacuation and backflow as much as possible. The general characteristic curve surge control method and system based on the principle of similitude are used for preventing influence caused by entrance conditions, such as changes in molecular mass, temperature, pressure and the like,during anti-surge control.
Description
technical field [0001] The invention relates to anti-surge control and protection of a turbo compressor, especially uses a general characteristic curve coordinate system irrelevant to inlet conditions to solve the accuracy of measurement and calculation of the operating point of the compressor and the surge area. Background technique [0002] Surge is a unique attribute of axial flow and centrifugal compressors. Strong surge will damage the thrust bearing, cause friction inside the machine, and seriously damage compressor components. Continuous surge will cause serious damage to the compressor. During system operation, surge conditions must be avoided. [0003] Effective anti-surge control is related to many factors, such as process technology, compressor, control valve, dynamic response characteristics of measurement and control equipment, etc., especially the accuracy of control system measurement and calculation. [0004] Because the anti-surge control is realized throug...
Claims
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IPC IPC(8): F04D27/02
CPCF04D27/02F04D27/0215F04D27/0261F05D2270/3011F05D2270/3013F05D2270/3061F05D2270/71
Inventor 秦国良纪云锋陈雪飞张帅甲
Owner HANGZHOU HOLLYSYS AUTOMATION