A method for calculating the influence of a low-temperature economizer on the heat consumption rate of a steam turbine unit

A low-temperature economizer and calculation method technology, applied in the direction of calculation, instrument, data processing application, etc., can solve the problem that there is no calculation method yet

Active Publication Date: 2019-03-08
GUODIAN SCI & TECH RES INST +1
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Problems solved by technology

[0003] At present, the calculation methods for calculating the influence of low-temperature economizers on the heat rate of steam turbines are all b

Method used

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  • A method for calculating the influence of a low-temperature economizer on the heat consumption rate of a steam turbine unit
  • A method for calculating the influence of a low-temperature economizer on the heat consumption rate of a steam turbine unit
  • A method for calculating the influence of a low-temperature economizer on the heat consumption rate of a steam turbine unit

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Embodiment 1

[0102] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings.

[0103] In order to facilitate the understanding of the calculation method of the present invention, as follows figure 1 Shown is a home-made intermediate reheating, single-shaft, two-cylinder, two-exhaust, condensing steam turbine, the feedwater reheating system is 3 high plus 1 deaeration + 4 low plus, and it is equipped with a steam-driven feedwater pump The unit is described for the column.

[0104] figure 1 Shown is a reheat unit with 8 stages of regenerative extraction. Its thermal system is mainly composed of boiler 1, main steam (main steam pipeline) 2, reheat steam (reheat steam pipeline) 3, high pressure cylinder 4, medium pressure cylinder 5, low pressure cylinder 6, generator 7, condensing steam 8, and then reduce the water 9. And one draw 10, two draws 18, three draws 11, four draws 12, five draws 13, six draws 14, seven draws ...

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Abstract

The invention provides a method for calculating the influence of a low-temperature economizer on the heat consumption rate of a steam turbine unit, which comprises the following specific steps of 1) collecting original data; 2) putting the first calculation of the steam extraction amount of each stage after the low-temperature economizer into operation; 3) iteratively calculating that steam extraction amount of each stage to convergence; 4) calculating a new generator power according to the energy balance; 5) calculating that heat consumption rate reduction value of the unit after the low-temperature economize is put into use. The calculation principle of the invention is simple and easy to understand, and has strong practical value; the invention fully considers the operation characteristic of the steam turbine under the off-design condition, and the calculation method for calculating the influence quantity of the low-temperature economizer on the heat consumption rate of the steam turbine unit can more accurately calculate the energy-saving quantity.

Description

technical field [0001] The invention relates to a method for calculating the influence of a low-temperature economizer on the heat consumption rate of a steam turbine unit, belonging to the technical field of electric power design. Background technique [0002] Thermal power units are a large energy consumer in my country, and their energy conservation and emission reduction are of great significance to my country's energy strategy. Utilization of flue gas waste heat from power plant boilers is one of the important means of energy saving and emission reduction for thermal power units, and installing low-temperature economizers in coal-fired boilers is currently the most mature and widely used method of flue gas waste heat utilization. The waste heat of the flue gas is recovered by the low-temperature economizer to heat the condensed water, and then the steam turbine is exhausted, so as to reduce the heat consumption rate of the steam turbine unit and reduce the coal consumpt...

Claims

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Application Information

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IPC IPC(8): G06Q10/06G06Q50/06
CPCG06Q10/0639G06Q50/06
Inventor 杨文正谭锐殷戈李呈桐郝飞于强吕婧
Owner GUODIAN SCI & TECH RES INST
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