660MW-grade primary intermediate reheat extraction steam turbine unit

A 660MW, steam turbine technology, applied in the direction of steam engine devices, machines/engines, mechanical equipment, etc., can solve the problems of high coal consumption for power supply, low energy utilization rate, and increased pollutant emissions, so as to save energy, strengthen vitality, and improve efficiency Effect

Inactive Publication Date: 2016-03-02
HARBIN TURBINE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of high coal consumption for power supply of existing thermal power unit equipment, not only low energy utilization rate but also increased pollutant discharge, and further provide a 660MW grade intermediate reheat extraction steam turbine unit

Method used

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  • 660MW-grade primary intermediate reheat extraction steam turbine unit
  • 660MW-grade primary intermediate reheat extraction steam turbine unit
  • 660MW-grade primary intermediate reheat extraction steam turbine unit

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specific Embodiment approach 1

[0019] Specific implementation mode one: combine Figure 1 to Figure 9 Describe this embodiment, a 660MW class once intermediate reheat extraction steam turbine unit in this embodiment, which includes high and medium pressure cylinder 1, low pressure cylinder 2, front bearing box 3, 2# bearing box 4, 3# bearing box 5 , medium and low pressure connecting pipe 6, hydraulic control butterfly valve 7 and elastic end seal assembly 8,

[0020] Front bearing box 3, high and medium pressure cylinder 1, 2# bearing box 4, low pressure cylinder 2 and 3# bearing box 5 are arranged in sequence from right to left; medium and low pressure connecting pipe 6 guides the middle exhaust steam of high and high pressure cylinder 1 into Low-pressure cylinder 2 (viewed from the governor end to the motor end), the hydraulic control butterfly valve 7 is installed on the medium-low pressure communication pipe 6, two low-pressure heating and extraction ports 11-1 and one medium-pressure steam supply and ...

specific Embodiment approach 2

[0022] Specific implementation mode two: combination figure 1 Describe this embodiment, the front bearing housing 3, 2# bearing housing 4 and 3# bearing housing 5 of this embodiment are all floor bearing housings. Such a setting can avoid the misalignment of the low-pressure dynamic and static parts of the unit caused by the high back pressure and large change of the back pressure of the block-cylinder bearing box of the existing model, resulting in the problem of dynamic and static friction of the unit. Other compositions and connections are the same as in the first embodiment.

specific Embodiment approach 3

[0023] Specific implementation mode three: combination Figure 1 to Figure 2 To illustrate this embodiment, this embodiment also includes two high-pressure main steam control valves 9 and two medium-pressure reheat control joint valves 10, the two high-pressure main steam control valves 9 and two medium-pressure reheat control joint valves 10 are both It is symmetrically installed on the left and right sides of the high and medium pressure cylinder 1. Such setting can realize the joint start-up of high and medium pressure of the unit. Other compositions and connections are the same as those in the second embodiment.

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Abstract

The invention discloses a 660MW-grade primary intermediate reheat extraction steam turbine unit relating to an extraction steam turbine unit and aims at solving the problems of high net coal consumption rate, low energy utilization rate and pollutant discharge increment of the existing thermal power generating unit equipment. A front bearing box, a high-medium-pressure cylinder, a 2 # bearing box, a low-pressure cylinder and a 3# bearing box are sequentially arranged; two high-pressure main steam regulating valves and two medium-pressure reheat regulating combined valves are respectively located at the left and right sides of the high-medium-pressure cylinder; and middle-row steam is introduced to the low-pressure cylinder through a communicating pipe. Due to the adoption of a communicating pipe structure with a hydraulic control butterfly valve, double steam extraction openings are formed in the lower part of the middle row of the high-medium-pressure cylinder, so that the steam extraction capacity can be regulated to be high enough, and furthermore heating demands in winter can be met. The 660MW-grade primary intermediate reheat extraction steam turbine unit is ultra-supercritical and has the advantages of primary intermediate reheat, single shaft, two-cylinder and two-row steam, double extraction, eight-stage back-heating steam extraction and steam condensation. The 660MW-grade primary intermediate reheat extraction steam turbine unit is suitable for pure-condensation power generation in a non-heating period and combined heat and power generation in a heating period.

Description

technical field [0001] The invention relates to a steam extraction type steam turbine unit, in particular to a 660MW level primary reheat extraction steam turbine unit. Background technique [0002] An extraction steam turbine is a steam turbine that extracts a part of steam from the middle stage of the steam turbine to supply users, that is, a steam turbine that also supplies heat while generating electricity. According to the needs of users, it can be designed as a steam extraction type of primary regulation or a steam extraction type of secondary regulation. With the increasing shortage of coal resources, my country's existing thermal power units have high coal consumption for power supply, which not only has low energy utilization rate but also increases the emission of pollutants. Contents of the invention [0003] The purpose of the present invention is to solve the problem of high coal consumption for power supply of existing thermal power unit equipment, low energ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01K7/38F01K17/02F01D17/10F01D11/00F01D25/16
CPCY02E20/14
Inventor 王成佳董策柴发军孙杨耿金环张世伟刘娇李逍晗
Owner HARBIN TURBINE
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