Thermoelectric unit water supply bypass and transformer main reheating steam temperature wide-range adjusting system

A thermal power unit, reheating steam temperature technology, applied in feed water heater, superheat temperature control, preheating and other directions, to achieve the effect of reducing flue gas temperature, improving furnace efficiency and improving safety

Active Publication Date: 2021-03-26
XIAN THERMAL POWER RES INST CO LTD +1
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a thermal power unit feed water bypass and main transformer reheat steam temperature wide-area adjustment system, which can guarantee and increase the heat supply capacity, improve the electric load regulation ability, reduce the energy consumption level of the unit, and can be compared with the existing power supply system. New technology compatible with thermal correlation technology to solve a series of problems existing in existing thermoelectric decoupling technology

Method used

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  • Thermoelectric unit water supply bypass and transformer main reheating steam temperature wide-range adjusting system

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Embodiment approach

[0027] 1. The high-pressure heater bypass adjustment valve 3 is connected in parallel with the high-pressure heater 4, its inlet is connected to the inlet of the high-pressure heater 4, and its outlet is connected to the outlet of the high-pressure heater 4. The feedwater flow through the high-pressure heater can be continuously adjusted in the range of 0 to 100%, so as to adjust the heating and extraction flow. When the feedwater flow through the high-pressure heater is small, the steam extraction of the steam turbine is less, and the steam extraction for heating can be greatly increased, and the final increase can reach 20% to 30%.

[0028] 2. A main steam temperature regulating valve 2 is added, the inlet of which is connected to the inlet of the high-pressure heater 4, and the outlet is connected to the main steam system of the boiler 5 to form a normal desuperheating system of the main steam. This system is commonly used in the heating period, and can realize the adjustme...

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Abstract

The invention discloses a thermoelectric unit water supply bypass and transformer main reheating steam temperature wide-range adjusting system. According to the system, a high-pressure heater bypass adjusting valve (3) is additionally arranged to reduce the steam extraction amount of each stage of a steam turbine and reduce the water temperature at a boiler inlet; and meanwhile, a main steam temperature adjusting valve (1) and a reheating steam temperature adjusting valve (2) are additionally arranged to conduct wide-range adjustment on the main steam temperature and the reheating steam temperature, the heat supply steam extraction flow of the steam turbine is greatly increased, and therefore the purpose of greatly improving the electric load adjusting capacity is achieved while the heat supply capacity is improved. The technology has the advantages of reducing the energy consumption level of a unit and being compatible with existing heat supply related technologies.

Description

technical field [0001] The invention belongs to the field of power plant boiler and steam turbine systems, and in particular relates to a thermal power unit feedwater bypass and a main transformer reheat steam temperature wide-range adjustment system. Background technique [0002] In order to solve the problem of new energy consumption and improve the load regulation ability of thermal power units, it is the key goal of the flexibility transformation of thermal power units. Limited by the coupling characteristics of thermal and electrical loads, in the operation mode of thermal power, the thermal and electrical loads rise and fall at the same time, and the regulation performance is poor. When heating and heating units operate in winter, the electrical load is relatively high, and it is difficult to reduce it, which makes it difficult to accommodate new energy. Heat and power supply contradiction and insufficient heat supply are common problems of combined heat and power uni...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F22G5/00F22D1/32
CPCF22G5/00F22D1/325
Inventor 许朋江王东晔高庆范庆伟居文平黄嘉驷马汀山
Owner XIAN THERMAL POWER RES INST CO LTD
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