Secondary reheating unit with ultrahigh pressure cylinder and high-intermediate pressure cylinder both provided with additional heat regeneration stages

A technology of ultra-high pressure cylinder and high-medium pressure cylinder, which is applied in the field of secondary reheating units with additional reheating stages for both ultra-high pressure cylinders and high-medium pressure cylinders. The effective enthalpy drop of the cylinder and other issues can be solved to achieve the effects of simplifying the structure, improving the efficiency in the middle and low pressure cylinders, and reducing the steam consumption

Active Publication Date: 2018-10-12
章礼道
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AI Technical Summary

Problems solved by technology

[0016] When the secondary reheat temperature is constant, the exhaust humidity of the final blade of the low-pressure cylinder is related to the level of the secondary reheat pressure. Reheat pressure, that is, the secondary reheat pressure is determined by the exhaust steam humidity of the last stage blade of the low-pressure cylinder. In this way, the effective enthalpy drop of the high-pressure cylinder is often significantly compressed, and the heat absorption of the secondary reheat system is also limited.

Method used

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  • Secondary reheating unit with ultrahigh pressure cylinder and high-intermediate pressure cylinder both provided with additional heat regeneration stages

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Embodiment 1

[0071] Combine now figure 1 , taking a 1000MW class, the design value of the turbine side main steam temperature / primary reheat steam temperature / secondary reheat steam temperature is 585°C / 620°C / 620°C as an example to illustrate the implementation of the present invention preferred method.

[0072] A secondary reheating unit with an additional heat recovery stage for both the ultra-high pressure cylinder and the high and medium pressure cylinders of the present invention includes: a boiler water wall and an economizer (1), a boiler superheater system (2), and an additional heat recovery stage stage ultra-high pressure cylinder (3), boiler primary reheater system (4), high and medium pressure cylinder with additional recuperation stage (5), boiler secondary reheater system (6), medium and low pressure cylinder (7) , heater (8), heater drain pump (9), condenser (10), condensate pump (11), ultra-low temperature economizer (12), deaerator (13), electric feedwater pump (14 ), No...

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Abstract

The invention discloses a secondary reheating unit with an ultrahigh pressure cylinder and a high-intermediate pressure cylinder both provided with additional heat regeneration stages, and relates toa secondary reheating unit in the fire coal power station ultra-supercritical stage. In particular, the ultrahigh pressure cylinder and the high-intermediate pressure cylinder are both provided with the additional heat regeneration stages, a heat regeneration system is further optimized, main steam, primary reheating steam and secondary reheating parameters are further optimized, the heat consumption of the secondary reheating unit in the ultra-supercritical stage can be obviously reduced, and the greenhouse gas discharge can be obviously reduced.

Description

(1) Technical field: [0001] The double reheating unit of the ultra-high pressure cylinder and the high and medium pressure cylinders with additional heat recovery stages of the present invention relates to an ultra high pressure cylinder and high and medium pressure cylinders with additional heat recovery stages. After further optimization of the heat recovery system, the main steam , primary reheat steam, and secondary reheat steam parameters are further optimized for coal-fired power plants with ultra-supercritical grade double reheat units, which can significantly reduce the heat consumption of ultra-supercritical grade double reheat units and significantly reduce greenhouse gas emissions . (two) background technology: [0002] The design values ​​of the main steam temperature / primary reheat steam temperature / secondary reheat steam temperature of the typical turbine-side main steam temperature / primary reheat steam temperature of the existing double reheat steam turbine ge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01K7/38F01K7/40F01K7/22
CPCF01K7/22F01K7/38F01K7/40F05D2220/31F01K11/02F01K17/00F01D15/10
Inventor 章礼道
Owner 章礼道
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