CN-122015069-A - Multi-mode primary-secondary cooperative load-adjusting boiler

CN122015069ACN 122015069 ACN122015069 ACN 122015069ACN-122015069-A

Abstract

The invention provides a multi-mode primary-secondary cooperative load-adjusting boiler and a power generation system, which comprise at least two groups of boiler systems, a steam drum system and a main steam pipeline, wherein the boiler systems comprise a boiler, a superheater and a water-cooling circulating pipe, the superheater is arranged in the boiler, the water-cooling circulating pipe is arranged in the boiler and extends from the bottom to the top of the boiler, the steam drum system comprises at least one steam drum, the steam drum is connected with an external water supply source, a first output end of the steam drum is connected with an inlet of the water-cooling circulating pipe, a first input end of the steam drum is communicated with an outlet of the water-cooling circulating pipe, a second output end of the steam drum is communicated with an inlet of the superheater, and an outlet of the superheater is communicated with the main steam pipeline. According to the load-adjusting boiler, the load-adjusting requirements of a power grid are met by adjusting the number of the boiler systems participating in operation, the stability and the suitability of steam supply under different loads are ensured, and the high-efficiency power generation of a unit is ensured.

Inventors

LI JUNLIANG
WANG DONGZHEN
ZHANG QIJIAN
YANG MINGCHANG
LI ENPENG
YANG BING
CHANG ZHE
WANG YANSONG
LI YI

Assignees

西安热工研究院有限公司

Dates

Publication Date: 20260512
Application Date: 20260106

Claims (10)

1. A multi-mode primary and secondary collaborative load-adjusting boiler, comprising: at least two sets of boiler systems, drum systems and main steam lines; The boiler system comprises a boiler, a superheater and a water-cooling circulating pipe, wherein the superheater is arranged in the boiler, and the water-cooling circulating pipe is arranged in the boiler and extends from the bottom to the top of the boiler; The steam drum system comprises at least one steam drum, wherein the steam drum is connected with an external water supply source, a first output end of the steam drum is connected with an inlet of the water-cooling circulating pipe, a first input end of the steam drum is communicated with an outlet of the water-cooling circulating pipe, a second output end of the steam drum is communicated with an inlet of the superheater, and an outlet of the superheater is communicated with the main steam pipeline.
2. A multi-mode, primary and secondary, collaborative load-adjusting boiler according to claim 1, wherein the boiler system further comprises an economizer, a cold side inlet of the economizer is connected to an external water supply, a cold side outlet of the economizer is connected to a second input of the drum, and a hot side inlet of the economizer is connected to an exhaust of the boiler.
3. The multi-mode, primary and secondary, collaborative load-adjusting boiler of claim 2 further comprising an air preheater having a hot side inlet coupled to a hot side outlet of the economizer. The hot side inlet of the air preheater is connected with the exhaust port of the boiler.
4. A multi-mode, primary and secondary, collaborative load boiler according to claim 3, wherein the hot side inlet of the air preheater is connected to the exhaust of the boiler.
5. The multi-mode, primary and secondary collaborative load-adjusting boiler according to claim 4, further comprising: and the smoke exhaust system is connected with the hot side outlet of the air preheater.
6. The multi-mode primary-secondary collaborative load-adjusting boiler according to claim 5, wherein the fume exhaust system comprises a dust remover, an induced draft fan and a chimney which are connected in sequence, wherein the dust remover is connected with a hot side outlet of the air preheater.
7. The multi-mode primary-secondary collaborative load-adjusting boiler according to claim 1, further comprising: The coal supply system comprises a raw coal bucket, a coal mill and a powder exhauster which are sequentially connected, and the powder exhauster is connected with each boiler.
8. The multi-mode, primary and secondary collaborative load adjusting boiler according to claim 1, wherein the number of boiler systems is the same as the number of drums and the boiler systems are correspondingly connected with the first drum.
9. The multi-mode primary and secondary collaborative load-adjusting boiler according to claim 1, wherein a multi-way valve is provided on the main steam line, and the outlet of each superheater is connected with a different interface of the multi-way valve.
10. A power generation system comprising the multi-mode primary-secondary collaborative load-adjusting boiler of any one of claims 1 to 9.

Description

Multi-mode primary-secondary cooperative load-adjusting boiler Technical Field The embodiment of the invention belongs to the technical field of power generation systems, and particularly relates to a multi-mode primary-secondary cooperative load-adjusting boiler and a power generation system. Background With the increase of the duty ratio of clean electric energy such as photovoltaic, photo-thermal, wind power and the like and the subsequent new construction and operation of high-parameter and large-capacity thermal generator sets, the large-capacity and small-capacity generator sets are all involved in the deep peak shaving of the power grid, and the form can gradually become a normal state. However, the deviation between the operating parameters of the thermal power unit in the deep peak regulation state and the operating state parameters of the thermal power unit in high efficiency and high economy is larger, so that the economy of main and auxiliary equipment of the thermal power unit is continuously reduced, the power supply coal consumption is possibly increased, the water power is insufficient, the safety of each key part (a water cooling wall, a turbine rotor, a main steam pipeline, an inner furnace outer pipe seat and the like) of the thermal power unit in the deep peak regulation state is reduced, meanwhile, the environmental pollution index required by the standard is more difficult to control, the control technology and the cost of sulfur dioxide, nitrogen oxide and the like are required to be correspondingly improved, the thermal load in a boiler is relatively low under the low-load operating condition in the deep peak regulation process of the coal-fired thermal power unit, and meanwhile, the delay and the difficulty in ignition of combustion are often caused when the water content of coal is high and the volatile matters are low in the combustion process of fuel, so that the combustion is unstable and the combustion is deteriorated. Thus, there is a need for an adjustable load boiler. Disclosure of Invention The embodiment of the invention aims at solving at least one of the technical problems existing in the prior art and provides a multi-mode primary-secondary cooperative load-adjusting boiler and a power generation system. The embodiment of the invention provides a multi-mode primary-secondary cooperative load-adjusting boiler, which comprises: at least two sets of boiler systems, drum systems and main steam lines; The boiler system comprises a boiler, a superheater and a water-cooling circulating pipe, wherein the superheater is arranged in the boiler, and the water-cooling circulating pipe is arranged in the boiler and extends from the bottom to the top of the boiler; The steam drum system comprises at least one steam drum, wherein the steam drum is connected with an external water supply source, a first output end of the steam drum is connected with an inlet of the water-cooling circulating pipe, a first input end of the steam drum is communicated with an outlet of the water-cooling circulating pipe, a second output end of the steam drum is communicated with an inlet of the superheater, and an outlet of the superheater is communicated with the main steam pipeline. In some embodiments of the invention, the boiler system further comprises an economizer, a cold side inlet of the economizer being connected to an external water supply, a cold side outlet of the economizer being connected to the second input of the drum, and a hot side inlet of the economizer being connected to an exhaust port of the boiler. In some embodiments of the invention, the boiler system further comprises an air preheater, a hot side inlet of which is connected with a hot side outlet of the economizer. The hot side inlet of the air preheater is connected with the exhaust port of the boiler. In some embodiments of the invention, the hot side inlet of the air preheater is connected to the exhaust port of the boiler. In some embodiments of the present invention, the multi-mode primary-secondary collaborative load-adjusting boiler further comprises: and the smoke exhaust system is connected with the hot side outlet of the air preheater. In some embodiments of the invention, the fume extraction system comprises a dust remover, an induced draft fan and a chimney connected in sequence, wherein the dust remover is connected with a hot side outlet of the air preheater. In some embodiments of the present invention, the multi-mode primary-secondary collaborative load-adjusting boiler further comprises: The coal supply system comprises a raw coal bucket, a coal mill and a powder exhauster which are sequentially connected, and the powder exhauster is connected with each boiler. In some embodiments of the invention, the number of boiler systems is the same as the number of drums, and the boiler systems are connected to the first drum. In some embodiments of the invention, a multi-way valve is provided on the main steam line, the