Gas turbine set waste heat boiler flue gas flow calculation method

A flue gas flow, waste heat boiler technology, applied in the combustion method, combustion chamber, combustion equipment and other directions, can solve the problem of lack of measurement and calculation, and achieve the effect of strong reliability and convenient and fast calculation process

Pending Publication Date: 2020-02-11
ELECTRIC POWER SCI & RES INST OF STATE GRID TIANJIN ELECTRIC POWER CO +2
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Problems solved by technology

At present, the confirmation of the flue gas flow rate in ASME PTC4.4-2008 is calculated through the calculation model of the heat balance of the gas turbine or the calculation model of the heat balance of the waste heat boiler, which lacks the content of the measurement and calculation part.

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  • Gas turbine set waste heat boiler flue gas flow calculation method
  • Gas turbine set waste heat boiler flue gas flow calculation method
  • Gas turbine set waste heat boiler flue gas flow calculation method

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Embodiment Construction

[0043] The present invention is further described in detail through the following examples, but the technical content described in this example is illustrative rather than limiting, and should not limit the protection scope of the present invention accordingly.

[0044] A gas turbine waste heat boiler flue gas flow calculation method, the innovation of the present invention lies in: comprising the following steps:

[0045] ⑴ Use the cross-section grid method to arrange the measuring points at the waste heat boiler exhaust outlet;

[0046] (2) Measure the flue gas composition and content at each measuring point at the waste heat boiler exhaust outlet with a flue gas analyzer and a thermo-hygrometer, and calculate the flue gas density under standard conditions according to each gas composition and flue gas temperature;

[0047] (3) Use pitot tube and electronic micromanometer to measure the dynamic pressure and static pressure of the flue gas at each measuring point of the waste...

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Abstract

The invention relates to a gas turbine set waste heat boiler flue gas flow calculation method. The method comprises the steps that firstly, a cross section grid method is used for arranging measuringpoints at a waste heat boiler smoke exhaust outlet; then measuring the smoke components and content of each measuring point position, and calculating the smoke density; measuring the temperature, thedynamic pressure and the static pressure of the flue gas at each measuring point position, and calculating the flow velocity of the flue gas; final calculation of flue gas flow. Only flue gas dynamicand static pressure values, temperature, flue gas components and content, local atmospheric pressure and cross sectional area of a flue at a measuring point position need to be measured on site; measurement data are relatively few, the operation state of the waste heat boiler can be visually reflected, the data have high reliability, the calculation process is convenient and fast, and the method can be verified with a gas turbine heat balance calculation model and a waste heat boiler heat balance calculation model.

Description

technical field [0001] The invention belongs to the technical field of waste heat boiler monitoring of a gas turbine unit, in particular to a calculation method for flue gas flow of a waste heat boiler of a gas turbine unit. Background technique [0002] In the gas-steam combined cycle system, the waste heat boiler is a device that uses the exhaust heat of the gas turbine to transfer energy to the steam turbine. The efficiency of the waste heat boiler directly affects the output power of the steam turbine unit. To calculate the efficiency of the waste heat boiler, it is necessary to determine the flow rate of the flue gas. At present, the confirmation of the flue gas flow in ASME PTC4.4-2008 is calculated through the calculation model of the heat balance of the gas turbine or the calculation model of the heat balance of the waste heat boiler, which lacks the content of measurement and calculation. [0003] The flue gas flow calculated by on-site measurement can better reflec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/11F23M11/04
CPCG06F17/11F23M11/047
Inventor 艾邓鑫王桂林胡青波王森赵越周义刚薛泽海边疆周连升甘智勇
Owner ELECTRIC POWER SCI & RES INST OF STATE GRID TIANJIN ELECTRIC POWER CO
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