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300MW-capacity-level low vacuum heat supply steam turbine system and adjusting method thereof

A 300MW, heating steam turbine technology, applied in steam engine installations, mechanical equipment, steam applications, etc., can solve the problems of increased exhaust steam pressure, high last stage blades, affecting the thermal expansion of the unit, etc. Scope, the effect of improving safety

Inactive Publication Date: 2013-04-03
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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AI Technical Summary

Problems solved by technology

However, at present, the low-vacuum circulating water heating units of steam turbines are transformed from small and medium-capacity pure condensing units. Cylinder and single cylinder layout, large exhaust flow, high final stage blades, low vacuum heating, exhaust pressure rises, directly affects the thermal expansion of the unit, differential expansion, vibration, string shaft and other indicators, the unit cannot run safely and stably

Method used

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  • 300MW-capacity-level low vacuum heat supply steam turbine system and adjusting method thereof

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with the accompanying drawings and specific examples.

[0023] figure 1 It is a schematic diagram of a low-vacuum heating steam turbine system with a capacity of 300MW.

[0024] The 300MW capacity level low vacuum heating steam turbine system consists of a 300MW capacity level low vacuum heating turbine generator set and a power plant cold end and heating load coupling regulation system. In the 300MW capacity level low-vacuum heating turbo-generator set, steam turbine high-pressure cylinder 1, steam turbine medium-pressure cylinder 2, steam turbine No. 1 low-pressure cylinder 3, steam turbine No. 2 low-pressure cylinder 4 and generator 5 are arranged in a single shaft. The high-pressure cylinder 1 of the steam turbine and the medium-pressure cylinder 2 of the steam turbine are arranged together. The shaft of the medium-pressure cylinder 2 of the steam turbine is connected with the shaft on one side of...

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Abstract

The invention belongs to the technical field of thermoelectricity, and relates to a 300MW-capacity-level low vacuum heat supply steam turbine system and an adjusting method thereof. The system consists of a 300MW-capacity-level low vacuum heat supply steam turbine generator set and a power plant cold end and heat supply load coupling adjusting system. A steam turbine high-pressure cylinder, a steam turbine medium-pressure cylinder, a steam turbine low-pressure cylinder I, a steam turbine low-pressure cylinder II and a generator are uniaxially arranged in the steam turbine generator set. In the heating period, the back pressure of the two low-pressure cylinders rises, and a steam turbine set runs under low vacuum; steam is uniformly divided into two strands when entering a communicating pipe at the front of the two low-pressure cylinders, so that the flow of each low-pressure cylinder is half the flow of the low-pressure cylinder of the 300MW-capacity-level steam turbine in the prior art, and the flow is greatly reduced; the length of the last-stage blade is shortened, the adjusting range of back pressure is expanded, and the safety of the system is improved; and in the non-heating period, the steam turbine set runs under the straight condensing condition. The invention is applicable for a 300MW-capacity-level combined heat and power steam turbine set to implement low vacuum heat supply.

Description

technical field [0001] The invention belongs to the technical field of thermoelectricity, and in particular relates to a low-vacuum heating steam turbine system with a capacity of 300MW and an adjustment method thereof. Background technique [0002] In the "Energy Conservation Law of the People's Republic of China", the state encourages the development of cogeneration of heat and power, centralized heating, and improves the utilization rate of thermal power units. The "National Regulations on the Development of Cogeneration of Heat and Power" also pointed out that cogeneration of heat and power can save energy, improve the environment, improve the quality of heat supply, and increase power supply. Measures are an important part of central heating and a public welfare infrastructure to improve people's quality of life. The condenser operates in low vacuum, and the circulating water heating method, as a kind of central heating method, has attracted more and more attention bec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01K17/02
CPCY02E20/14Y02P80/15
Inventor 杨勇平李沛峰何坚忍戈志华杨佳霖宋之平
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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