Control method and device for external steam cooler regenerative system

A technology of steam cooler and heat recovery system, which is applied in the direction of steam generation, preheating, feed water heater, etc., and can solve the problem that the liquid level of the external steam cooler and the liquid level of the high-pressure heater are difficult to coordinate

Pending Publication Date: 2019-06-11
CHINA POWER ENG CONSULTING GRP CORP EAST CHINA ELECTRIC POWER DESIGN INST
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The object of the present invention is to provide a control method and device for the heat recovery system of an external steam cooler, which is used to solve the p

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  • Control method and device for external steam cooler regenerative system
  • Control method and device for external steam cooler regenerative system
  • Control method and device for external steam cooler regenerative system

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Embodiment Construction

[0035] In the following description, many technical details are proposed in order to enable readers to better understand the application. However, those skilled in the art can understand that without these technical details and various changes and modifications based on the following implementation modes, the technical solution claimed in each claim of the present application can be realized.

[0036] In order to make the purpose, technical solution and advantages of the present invention clearer, the following will further describe the implementation of the present invention in detail in conjunction with the accompanying drawings.

[0037] The first embodiment of the present invention relates to a control method for a heat recovery system of an external steam cooler. Figure 4 is a schematic diagram of the control scheme of the external steam cooler recuperation system; Figure 5 It is a schematic flowchart of the control method of the heat recovery system of the external st...

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Abstract

The invention discloses a control method and device for an external steam cooler regenerative system. The external steam cooler regenerative system adopts double-row high-pressure heater configuration, the external steam cooler liquid level LW is jointly and synchronously controlled by a regulating valve VW1A for dewatering from a first high-pressure heater A to an external steam cooler and a regulating valve VW1B for dewatering from a first high-pressure heater B to the external steam cooler. The difference between an external steam cooler liquid level LW set value and a feedback value is sent into a PID regulator. During actual operation, an operator can manually set polarization according to different situations, an output control command is calculated, averaged and then sent to the regulating valve VW1A for dewatering from the first high-pressure heater A to the external steam cooler and sent to the regulating valve VW1B for dewatering from first high-pressure heater B to the external steam cooler, receiving commands of the two valves are coincident, motions are coincident, unified and synchronous control is achieved when the two valves control the same-parameter external steamcooler liquid level LW, and the control method and device are simple and precise.

Description

technical field [0001] The invention relates to the field of thermal power generation, in particular to a control method and device for a heat recovery system of an external steam cooler. Background technique [0002] The heat recovery system of the external steam cooler is to use the high superheat of the steam turbine to extract steam to heat and add water. After the water is heated and vaporized, the steam generated is used to heat the feed water. figure 1 It is a structural schematic diagram of the heat recovery system of the external steam cooler. Such as figure 1 As shown, the heat recovery system of the external steam cooler is a double-row high-pressure configuration, and the heat recovery system of the external steam cooler includes: an external steam cooler, #1 high-pressure heater A and #1 high-pressure heater B. [0003] While improving the efficiency of the thermal system, the heat recovery system of the external steam cooler significantly reduces the cost of ...

Claims

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Application Information

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IPC IPC(8): F22D1/32
Inventor 孙海翠
Owner CHINA POWER ENG CONSULTING GRP CORP EAST CHINA ELECTRIC POWER DESIGN INST
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