Method for changing steam feed pump system into full-variable-frequency high-rotating-speed electrically-driven feed pump system and brand-new logic control system of full-variable-frequency high-rotating-speed electrically-driven feed pump system

A technology of electric feed water pump and steam feed water pump, which is applied in the direction of pump control, water supply control, pump, etc., and can solve problems such as poor accuracy, operation safety failure, and low efficiency

Pending Publication Date: 2020-10-20
刘亚辉
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The present invention proposes a method for changing a steam-driven feedwater pump system to a full-frequency variable-speed high-speed electric feedwater pump system and a b

Method used

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  • Method for changing steam feed pump system into full-variable-frequency high-rotating-speed electrically-driven feed pump system and brand-new logic control system of full-variable-frequency high-rotating-speed electrically-driven feed pump system
  • Method for changing steam feed pump system into full-variable-frequency high-rotating-speed electrically-driven feed pump system and brand-new logic control system of full-variable-frequency high-rotating-speed electrically-driven feed pump system
  • Method for changing steam feed pump system into full-variable-frequency high-rotating-speed electrically-driven feed pump system and brand-new logic control system of full-variable-frequency high-rotating-speed electrically-driven feed pump system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0139] Embodiment 1, the main structure of the hardware of the steam-operated water feed pump 315 composed of two 50% capacity feed water pumps 315 is: there are two small steam turbines to respectively drive a 50% capacity water feed pump 315 to work, this kind of structure According to the different positions of the front pump 316 configured in the system, it is also divided into Type A and Type B.

[0140] Type A:

[0141] The structure of the original A-type steam-driven feed water pump consisting of two 50% capacity feed water pumps 315 is: two small steam turbines and two 50% capacity feed water pumps 315 are arranged on the same floor with the large steam turbine (about at the power generation 12-14 meters away from the power plant room), but the two sets of front pump motors 317 and front pumps 316 respectively corresponding to these two sets of feed water pumps 315 are arranged on the zero-meter floor of the power plant ground, which are not on the same floor as the f...

Embodiment 2

[0147] In the second embodiment, a small steam turbine drives a 100% capacity feed water pump 315 to work. This structure is divided into Type A and Type B according to the different positions of the front pump 316 configured in the system.

[0148] Type A:

[0149] The structure of the original A-type steam-driven feedwater pump 315 made up of a 100% capacity feedwater pump 315 is: the small steam turbine and the feedwater pump 315 are arranged on the same floor with the large steam turbine (about 12-14 meters in the engine room of the power plant ), but the pre-pump motor 317 and the pre-pump 316 are arranged on the zero-meter floor of the power plant ground, and the layout of the feed water pump 315 is not on the same floor, that is, "a small steam turbine and a feed water pump 315" are in the machine room 12- The height of 14 meters, and the arrangement of "a front pump motor 317 and a front pump 316" at zero meters in the machine room.

[0150] like Figure 7 As shown, ...

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Abstract

The invention provides a method for changing a steam feed pump system into a full-variable-frequency high-rotating-speed electrically-driven feed pump system and a brand-new logic control system of the full-variable-frequency high-rotating-speed electrically-driven feed pump system. The steam feed pump system comprises a small steam turbine, a steam feed pump control system DEH, a reduction gear box, a feed pump, a booster pump motor and a booster pump, wherein the reduction gear box, the feed pump, the booster pump motor and the booster pump jointly serve as part of a rotating hardware structure of the refitted full-variable-frequency high-rotating-speed electrically-driven feed pump system. The method comprises the following steps that the small steam turbine and the steam feed pump control system DEH in the steam feed pump control system are dismantled; and a high-rotating-speed motor is installed at the position of the original small steam turbine, the high-rotating-speed motor isin mechanical transmission connection with the feed pump, and the high-rotating-speed motor is connected to a refitted brand-new logic control system through a high-voltage frequency converter. The changed brand-new system is controlled and driven by using brand-new computational logic and a control method, and a traditional method for calculation and control by using the water level of a steam drum is abandoned

Description

technical field [0001] The present invention relates to the technical field related to the feedwater pump system of a power plant, specifically, to a method for changing a steam-driven feedwater pump system to a fully variable-frequency high-speed electric feedwater pump system, and a method for changing a steam-driven feedwater pump system to a fully variable-frequency high-speed electric feedwater pump system Brand new logic control system for electric feed water pump system. Background technique [0002] At present, with the in-depth development of energy-saving and consumption-reducing work in deep peak-shaving operation of power plants, the issue of energy saving and safe operation of unit steam-driven feed pumps has received increasing attention. Among them, in the actual operation of power plants, steam-driven feed pumps The water pump system is a system driven by a small steam turbine powered by high-pressure steam. The power output by the generator set is generated ...

Claims

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Application Information

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IPC IPC(8): F04B17/03F04B49/20F01K11/02F01K13/02F01K13/00F22D5/32
CPCF01K11/02F01K13/003F01K13/02F04B17/03F04B49/20F22D5/32
Inventor 刘亚辉
Owner 刘亚辉
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