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Control method and control device of deep peak shaving boiler and thermal power generation system

A boiler control and peak shaving technology, applied in the control system, combustion method, controlled combustion and other directions, can solve problems such as fire extinguishing and loss of stability of combustion in the furnace, reduce heat loss, meet the needs of remote control, and avoid instability. Effect

Inactive Publication Date: 2018-12-21
国电电力大连庄河发电有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, under 30% of the rated load, boilers in thermal power generation systems often extinguish the fire due to combustion deterioration, that is, the combustion in the furnace loses stability, which is also the difficulty in realizing deep peak-shaving operation through flexible transformation

Method used

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  • Control method and control device of deep peak shaving boiler and thermal power generation system
  • Control method and control device of deep peak shaving boiler and thermal power generation system
  • Control method and control device of deep peak shaving boiler and thermal power generation system

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Embodiment 1

[0045] figure 1 It is a flow chart of the steps of a control method for a deep peak-shaving boiler provided in the embodiment of the present application.

[0046] Such as figure 1 As shown, the deep peak-shaving boiler control method provided in this embodiment is applied to a boiler of a 600MW thermal power generation system. In order to achieve stable combustion of the boiler during low-load operation, it is necessary to ensure that the temperature in the furnace does not drop, so that the fuel after entering the furnace can be continuously burned to maintain normal operation. Therefore, the deep peak regulation control method of the present application specifically includes the following steps:

[0047] S1. When the boiler enters the low-load operation state, input lignite as the main type of coal into the furnace.

[0048] When the unit is running at low load, lignite is used as the main furnace coal. Since lignite has a lower calorific value than bituminous coal, it ca...

Embodiment 2

[0069] Figure 4 A structural block diagram of a control device for a deep peak-shaving boiler provided in an embodiment of the present application.

[0070] Such as Figure 4 As shown, the deep peak-shaving boiler control device provided in this embodiment is applied to a boiler of a 600MW thermal power generation system. In order to achieve stable combustion of the boiler during low-load operation, it is necessary to ensure that the temperature in the furnace does not drop, so that the fuel after entering the furnace can be continuously burned to maintain normal operation. Therefore, the deep peak shaving control device of the present application specifically includes a coal feeding control module 10 and an air volume control module 20

[0071] The coal input control module is used to control the coal input equipment to input lignite as the main coal type when the boiler enters the low-load operation state.

[0072] When the unit is running at low load, lignite is used as...

Embodiment 3

[0101] This embodiment provides a thermal power generation system, the thermal power generation system at least includes a boiler, and the boiler is provided with the deep peak-shaving boiler control device provided in the previous embodiment. The control device is used to put lignite into the furnace as the main coal type when the boiler enters the low-load operation state; strictly control the primary air flow into the furnace, and control the primary air flow below 100t / h. Through the above measures, the fuel supply into the furnace can be stabilized, continuous combustion can be ensured and sufficient heat can be continuously released to maintain the temperature in the furnace, unnecessary heat loss can also be reduced, and the temperature in the furnace will not drop, so that the boiler can operate at low load. During the operation, the combustion can be stable, so as to avoid the combustion in the furnace from being extinguished due to instability.

[0102] In this appli...

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Abstract

The invention discloses a control method and a control device of deep peak shaving boiler and a thermal power generation system. The control method and the control device are applied to a boiler witha 600 MW thermal power generation system, and specifically comprises the following steps that when the boiler enters a low-load operation state, the lignite is put into a furnace to serve as a main raw material of the furnace; a primary air flow of the inlet furnace is strictly controlled, and the primary air flow is controlled to be 100t / h or below. Through the above measures, the fuel put in thefurnace can be supplied stably, continuous combustion can be guaranteed, sufficient heat can be continuously released to maintain the temperature in the furnace, and unnecessary heat loss can be further reduced, the temperature in the furnace cannot be reduced, so that the boiler can be stably combusted during the low-load operation period, and the combustion in the furnace can be prevented frombeing extinguished due to instability.

Description

technical field [0001] The present application relates to the technical field of thermal power generation, and more specifically, relates to a control method and device for a deep peak-shaving boiler, and a thermal power generation system. Background technique [0002] In order to solve the problem of difficult consumption of new energy power generation and reduce the curtailment of wind and light, it is necessary to carry out flexible transformation of the thermal power system that complements the new energy power generation system, so that the thermal power system can achieve deep peak regulation, so that Able to work at lower power. By reducing the power of thermal power when necessary, the wind power system and solar power generation system can effectively use wind energy and solar energy, thereby reducing the occurrence of wind and light abandonment. [0003] The specific purpose of the flexibility transformation is to reduce the minimum technical output of the unit to...

Claims

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Application Information

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IPC IPC(8): F22B35/00F23N1/02
CPCF22B35/00F23N1/02
Inventor 冯树臣李泓仝声杨丰年谷雪冬张金祥张国富刘久刚石伟郑震乾王丰张卫东姜晓弢张志国姜建华龚伟侯申德孙艳志李光辉柳向军张金雍涛高贺
Owner 国电电力大连庄河发电有限责任公司
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