A supercharged main engine coaxially driven feed water pump system with a small pure condensate extraction machine

A technology of coaxial drive and water supply pump, which is applied in the direction of machines/engines, mechanical equipment, etc., and can solve the problems of high investment, low return on investment and unfeasible economic aspects of the overall renovation project

Active Publication Date: 2017-12-05
国能浙江北仑第一发电有限公司 +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, using this technology to upgrade subcritical low-parameter thermal power units requires replacement of new secondary reheat boilers, addition of front cylinders, replacement of heaters and other main and auxiliary equipment. The overall transformation project investment is very high, resulting in a return on investment Low, economically unfeasible

Method used

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  • A supercharged main engine coaxially driven feed water pump system with a small pure condensate extraction machine
  • A supercharged main engine coaxially driven feed water pump system with a small pure condensate extraction machine
  • A supercharged main engine coaxially driven feed water pump system with a small pure condensate extraction machine

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Embodiment 1

[0081] image 3 It is a structural diagram of a supercharged main engine coaxially driven feed water pump system including a small pure condensing steam extraction machine in Embodiment 1 of the present invention.

[0082] and figure 2 Compared with the supercharged steam turbine thermal system with the shown back pressure extraction cylinder, the present invention adds a second back pressure extraction cylinder (BEST-2) and a second condenser which are not available in the prior art, as shown in the figure , the supercharged main engine coaxially driven feed water pump system containing a small pure condensate extraction machine has a first reheater, a second reheater, a first condenser, a second condenser, a condensate pump, and a deaerator , superheater, economizer, feed water main pump, feed water front pump, speed control gearbox, first generator, second generator, first back pressure extraction cylinder (BEST-1), second back pressure extraction Steam cylinder (BEST-2)...

Embodiment 2

[0092] Figure 4 It is a structural diagram of a supercharged main engine coaxially driven feed water pump system including a small pure condensing steam extraction machine in Embodiment 2 of the present invention.

[0093] Embodiment 2 of the present invention is similar to Embodiment 1, the difference is that the steam extraction of the second high-pressure heater is connected from the steam extraction of the first back pressure extraction cylinder, and the throughflow of the ultra-high pressure cylinder and the first back pressure extraction cylinder As the capacity increases, the output of the first generator increases accordingly.

[0094] The technical solution of embodiment 2 can reduce the coal consumption for power supply ≥ 30g / kW.h.

Embodiment 3

[0096] Figure 5 It is a structural diagram of a supercharged main engine coaxially driven feed water pump system including a small pure condensing steam extraction machine in embodiment 3 of the present invention.

[0097] Embodiment 3 of the present invention is similar to Embodiment 2, the difference is that: the second back pressure extraction cylinder is no longer coaxially arranged with the ultra-high pressure cylinder, the first back pressure extraction cylinder, the first generator, and the feed water pump, and can be arranged according to Engineering needs, individually arranged, increased flexibility. A third generator is added to the second back pressure extraction cylinder, and the excess power can be generated through the third generator.

[0098] The technical solution of embodiment 3 can reduce the coal consumption for power supply ≥ 30g / kW.h.

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Abstract

The invention provides a supercharged main engine coaxially driven feed water pump system containing a small pure condensing steam extraction machine. The system is additionally equipped with a second back pressure extraction cylinder. The steam outlets of the cylinders are connected, and the steam outlet of the second back pressure extraction cylinder is condensed by the second condenser and then connected to the water inlet of the condensate pump. The coaxially driven feed water pump system of a supercharged main engine with a small pure condensing steam extraction unit of the present invention can further improve the thermal efficiency of power generation, reduce the coal consumption of power supply, increase the unit output and generate more power at the same time, and increase the return on investment.

Description

technical field [0001] The invention relates to a thermodynamic system coaxially driven by a feedwater pump and a front-end unit, in particular to a coaxially driven feedwater pump system of a supercharged main engine including a small pure condensing steam extraction unit. Background technique [0002] In order to improve the efficiency of thermal power generation units with low parameters such as subcritical, a double-reheat front-end steam turbine technology is currently proposed. For low-parameter turbines, a high-parameter front cylinder is added. By increasing the main steam parameters of thermal power units, and adopting Secondary reheating achieves the purpose of improving the overall thermal cycle efficiency. [0003] However, using this technology to upgrade subcritical low-parameter thermal power units requires replacement of new secondary reheat boilers, addition of front cylinders, replacement of heaters and other main and auxiliary equipment. The overall transf...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01D15/08F01D15/10
Inventor 曹沂沈维君吕一农陈立强贺益中申松林林磊曹昊姚君施刚夜陈仁杰刘鹤忠叶勇健金光勋高清辉
Owner 国能浙江北仑第一发电有限公司
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