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A system and method for coordinating cold-regeneration and hot-regeneration steam supply

A technology of steam supply system and reheated steam, which is applied in the field of steam turbines and can solve the problems of unable to extract a large amount of steam extraction, increase of steam extraction for heating, poor economy, etc.

Active Publication Date: 2021-04-27
GUODIAN SCI & TECH RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the pressure parameters of the cold resteam pipeline for steam extraction and heat supply are relatively high, the temperature is suitable, and the thermal economy is high, but the amount of steam extraction is limited by the wall temperature of the boiler reheater and cannot be extracted in large quantities. 6% of the re-steam volume; using the hot re-steam pipeline to extract steam and supply heat to the outside after cooling down can not be affected by the boiler, so as to achieve a substantial increase in heating and extraction steam, but due to its high steam temperature, it needs Heat can be supplied after cooling down, so its economy is poor

Method used

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  • A system and method for coordinating cold-regeneration and hot-regeneration steam supply
  • A system and method for coordinating cold-regeneration and hot-regeneration steam supply

Examples

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Effect test

Embodiment 1

[0031] A cold reheating and reheating cooperative steam supply system of this embodiment is arranged in a thermal power generating set for adjusting the steam supply to the steam supply header 5; the thermal power generating set includes a boiler 14, a main steam pipeline 17, High pressure cylinder 18, medium pressure cylinder 33, medium and low pressure connecting pipe 34, low pressure cylinder 35, generator 36, condenser 37, condensate pump 38, condensate water pipeline 40, low pressure heater 39, deaerator 29, feed water pump 32, High plus 3 (26), high plus 2 (25), high plus 1 (23), water supply pipeline 21, reheat steam pipeline hot section 15, reheat steam pipeline cold section 27, cold section extraction pipeline 13, supply Steam header 5 and external steam supply pipeline 4.

[0032] Among them, the first-stage extraction pipeline 20 and the second-stage extraction pipeline 28 of the high-pressure cylinder 18 are connected to the steam side inlets of the high-pressure c...

Embodiment 2

[0037] This embodiment adopts the cold reheating and hot reheating cooperative steam supply system in Embodiment 1, and its steam supply method includes the following specific steps:

[0038] 1) When the steam supply header 5 supplies heat to the outside, it enters the working state 1, the cold section extraction pipeline 13 is put into operation, the hot section extraction pipeline 19 exits, and the first cold re-extraction cut-off door 10 and the second cold section are opened. The re-extraction cut-off door 6 is used to control the steam extraction volume on the cold section extraction pipeline 13 by adjusting the cold re-extraction valve 12. After the steam enters the steam supply header 5, the external steam supply cut-off door 3 is opened, and the external steam supply is reduced. The temperature and pressure reducer 1 adjusts the pressure and temperature of the external steam supply, and the external steam supply control valve 2 coordinates with the cold re-extraction st...

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Abstract

The invention discloses a cold reheating and hot reheating cooperative steam supply system and method. The steam supply system is arranged in a thermal power generation unit, wherein the first-stage steam extraction and the second-stage steam extraction of the high-pressure cylinder are respectively connected to the high-pressure generator 1 and the high-heater steam generator through pipelines. 2 inlet on the steam side; in the reheat system, the hot section of the reheat steam pipe is connected between the outlet of the boiler reheater and the steam inlet of the medium-pressure cylinder of the steam turbine, and the cold section of the reheat steam pipe is connected between the exhaust port of the high-pressure cylinder and the steam inlet of the boiler Between the inlets of the reheater; the extraction steam at the cold section of the reheat steam pipeline is connected to the steam inlet of the cold section of the steam header through the cold section extraction pipeline, and in the reheat system, the extraction steam at the hot section of the reheat steam pipeline is drawn through the hot section The steam pipeline is connected to the steam side inlet of the evaporator, and divides the steam side outlet of the evaporator into two branches, the first branch is connected to the steam inlet of the hot section of the steam header, and the second branch is connected to the second Section extraction pipeline; the two ends of the water side of the evaporator are respectively connected to the water side inlet of high plus 1 and the water side outlet of high plus 2.

Description

Technical field: [0001] The invention relates to a cold reheating and hot reheating cooperative steam supply system and method, which are used for extracting steam from the cold section (cold reheating) of the reheat steam pipeline and extracting steam from the hot section (hot reheating) of the reheating steam pipeline for steam supply, belonging to field of steam turbines. Background technique: [0002] Large-scale thermal power units can not only realize their own energy saving and consumption reduction through cogeneration of heat and power, but also meet the heat parameters requirements of various heat users. However, in recent years, the proportion of new energy power generation such as wind power and solar power has been increasing, and these new energy power generation is affected by natural factors with great randomness, which leads to an increase in the pressure on power grid peak regulation. At present, only relying on pure condensing units to participate in powe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01K17/02F01K13/02
CPCF01K13/02F01K17/02
Inventor 王文飚杨希刚马晓峰谭锐杨文正
Owner GUODIAN SCI & TECH RES INST
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