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A combined cycle steam turbine quick-start pre-heating system and warm-up method thereof

A fast start, combined cycle technology, applied in the direction of machine/engine, steam engine installation, engine start, etc., can solve the problems of increasing power generation cost and low thermal efficiency, and achieves increasing peak shaving capacity and power generation, shortening time, and eliminating automatic The effect of the risk of damage to the synchronized clutch

Active Publication Date: 2019-12-31
SHANGHAI ELECTRIC POWER GENERATION EQUIPMENT CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when starting up, either let the gas turbine run at low load for a long time and wait for the steam turbine to warm up, resulting in low thermal efficiency; or let the gas turbine load quickly to participate in peak-shaving operation. The steam generated by the boiler is not allowed to enter the steam turbine to do work, but is directly discharged to the condenser through the bypass, which inevitably produces a large energy loss and increases the cost of power generation

Method used

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  • A combined cycle steam turbine quick-start pre-heating system and warm-up method thereof
  • A combined cycle steam turbine quick-start pre-heating system and warm-up method thereof
  • A combined cycle steam turbine quick-start pre-heating system and warm-up method thereof

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Embodiment 1

[0052] Such as figure 1 with image 3 As shown, Embodiment 1 of the present invention provides an embodiment of the combined cycle steam turbine quick-start preheating system of the present invention.

[0053] Such as figure 1 As shown, the combined cycle steam turbine quick-start preheating system of the first embodiment includes a warm-up steam source 3 and a coaxially arranged and sequentially connected gas turbine 1, a generator 17, an automatic synchronous clutch 2 and a steam turbine, that is, the rotating shaft of the generator 17 One end is connected with the rotor shaft of the gas turbine 1, and the other end of the rotating shaft of the generator 17 is connected with the rotor shaft of the steam turbine through the automatic synchronous clutch 2. Preferably, the gas turbine 1 and the steam turbine share the same barring device 18, and the barring device 18 is connected with the steam turbine. The capacity of the cranking device 18 in the first embodiment should be...

Embodiment 2

[0079] Such as figure 2 As shown, the second embodiment of the present invention provides the second embodiment of the combined cycle steam turbine quick start preheating system of the present invention. The second embodiment is basically the same as the first embodiment, and the similarities will not be repeated. The difference is that in the second embodiment, a gate valve 19 is provided on the medium-pressure steam inlet pipeline 400 upstream of the medium-pressure steam inlet valve group. , the warm-up steam delivery pipeline 100 communicates with the medium-pressure steam inlet pipeline 400 through the medium-pressure delivery pipeline 102 between the gate valve 19 and the medium-pressure steam inlet valve group. When the gate valve 19 is closed and the medium-pressure steam inlet valve group is opened, the warm-up steam in the warm-up steam delivery pipeline 100 can pass through the medium-pressure delivery pipeline 102 into the medium-pressure steam inlet pipeline 400,...

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Abstract

The invention relates to the technical field of fuel gas-steam combined cycle systems, in particular to a preheating system quickly started by a combined cycle steam turbine, and a heating method thereof. The system comprises a fuel gas turbine, an electric generator, an automatic synchronizing clutch, the steam turbine and a heating gas source, wherein the steam turbine comprises a high-pressurecylinder, a middle-pressure cylinder and a low-pressure cylinder; the heating gas source is connected with a heating steam conveying pipeline leading to the high-pressure cylinder and the middle-pressure cylinder; and the automatic synchronizing clutch is the clutch provided with a primary pawl and a secondary pawl. The method comprises the steps of when the fuel gas turbine is static or the rotating speed of the fuel gas turbine is lower than the rotating speed of the steam turbine, accelerating the rotating speed of the steam turbine; when the rotating speed of the steam turbine is tended toexceed the rotating speed of the fuel gas turbine, engaging the automatic synchronizing clutch, and leading a heating steam; when the rotating speed of the steam turbine is accelerated and stabilizedat p r / min, driving the fuel gas turbine and the electric generator to rotate at the speed of p r / min, and starting to heat; and when the temperature of a middle-pressure rotor of the steam turbine reaches to the preset temperature or the heating time reaches to the preset time, finishing heating. The cold start time can be shortened.

Description

technical field [0001] The invention relates to the technical field of gas-steam combined cycle systems, in particular to a combined cycle steam turbine quick-start preheating system and a warm-up method thereof. Background technique [0002] The steam turbine is one of the key power equipment in the construction of a power station, and it is an energy conversion device that converts thermal energy into mechanical energy and then into electrical energy. The high-temperature and high-pressure steam produced by the boiler converts the thermal energy and pressure potential energy into the mechanical energy of the steam turbine through the steam turbine, and drives the output shaft of the steam turbine rotor to do work. The mechanical energy is transmitted to the generator through the output shaft of the steam turbine rotor, thereby converting the mechanical energy into electrical energy . [0003] The gas-steam combined cycle system refers to using the gas turbine as a pre-tur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01D25/10F01D19/00F01D25/34F01K13/02F02C6/00F16D43/04
CPCF01D19/00F01D25/10F01D25/34F01K13/02F02C6/00F16D43/04
Inventor 冯磊张立建阳虹何阿平虎煜
Owner SHANGHAI ELECTRIC POWER GENERATION EQUIPMENT CO LTD
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