Water level control method and device for boiler steam drum

A boiler drum and water level control technology, applied in the field of automation, can solve the problems of inability to accurately control the boiler drum water level, boiler drum water level fluctuations, affecting boiler energy efficiency ratio, etc.

Active Publication Date: 2017-01-18
ELECTRON CO LTD
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Problems solved by technology

[0005] The embodiment of the present invention provides a method and device for controlling the water level of the boiler drum, which is used to solve the problem in the prior art that the water level of the boiler drum cannot be accurately controlled, resulting in large fluctuations in the water level of the boiler drum, thereby affecting the gas-liquid conversion , and even affect the energy efficiency ratio of the boiler

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  • Water level control method and device for boiler steam drum
  • Water level control method and device for boiler steam drum
  • Water level control method and device for boiler steam drum

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Embodiment Construction

[0058] Aiming at the problem of the inability to accurately control the water level of the boiler drum in the prior art, resulting in large fluctuations in the water level of the boiler drum, which in turn affects the gas-liquid conversion and even the energy efficiency ratio of the boiler, the inventor has conducted in-depth research and found , The boiler steam drum stores steam and water. The water level is used to describe the storage capacity of water in the boiler steam drum. The instantaneous inflow quality of the boiler steam drum is the instantaneous water added quality, and the instantaneous outflow quality of the boiler steam drum is the instantaneous steam quality. When the water added quality is equal to the instantaneous steam quality, the water level of the boiler drum tends to be stable. Therefore, the water level of the boiler drum can be controlled by adjusting the instantaneous steam quality to be equal to the instantaneous water added quality. Based on this, ...

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Abstract

The embodiment of the invention discloses a boiler drum water level control method and a boiler drum water level control device. The method comprises the steps of acquiring the display value of a water level gauge of a boiler drum at an interval of set period, determining whether the display value is equal to the optimal water level of the boiler drum, calculating the transient added water mass and the transient steam mass of the boiler drum if the display value is not equal to the optimal water level of the boiler drum, reducing the added water flow by a first set value if the transient added water mass is greater than the transient steam mass, and increasing the added water flow by the first set value if the transient added water mass is smaller than the transient steam mass. Compared with the method of adjusting the added water flow according to the steam flow in the prior art, the water level of the boiler drum can be accurately controlled to the optimal water level, sharp fluctuation of the water level of the boiler drum is avoided, and the gas-liquid conversion and energy efficiency ratio of the boiler drum are ensured.

Description

Technical field [0001] The invention relates to the field of automation technology, in particular to a method and device for controlling the water level of a boiler steam drum. Background technique [0002] The boiler drum is a key component of a natural circulation boiler. Whether it can work normally is directly related to the safety of the water circulation in the boiler and the quality of the output steam. The water level of the boiler drum is an important parameter that affects the smooth and high production of the boiler: if the water level of the boiler drum is too low, the amount of water in the boiler drum is less, and when the load becomes large, the water consumption in the boiler drum may accelerate and all may be vaporized. If the water level of the boiler drum is too high, because the boiler drum is usually a flat cylinder, the gas-liquid contact area becomes smaller, the gasification rate is reduced, and the steam entrains water phenomenon, and the temperature will...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05D27/02
Inventor 傅守滨赵健郭永良王淑妍赵相轩任燕玲鲍广荣
Owner ELECTRON CO LTD
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