Method for optimally controlling overall economic benefit of wet desulphurization device

An economical and optimal control technology, applied in neural architecture, genetic laws, biological neural network models, etc., can solve the problems of inability to fully automatic operation, lag, low sensitivity, etc., to avoid excessive SOX concentration, overcome hysteresis, The effect of low operating costs

Active Publication Date: 2021-11-02
BEIJING GUODIAN LONGYUAN ENVIRONMENTAL ENG
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  • Abstract
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  • Application Information

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Problems solved by technology

In addition, there are a series of problems such as the inability to fully automatic operation, low sensitivity, and serious lag.

Method used

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  • Method for optimally controlling overall economic benefit of wet desulphurization device
  • Method for optimally controlling overall economic benefit of wet desulphurization device
  • Method for optimally controlling overall economic benefit of wet desulphurization device

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Embodiment Construction

[0052] In the present invention, all the representations of "the amount of XX" can be expressed in various ways such as volume, mass, and amount of substance, and it is only necessary to ensure that the dimension is correct during the calculation process. Similarly, "XX's flow" can be expressed in various ways such as volume flow, mass flow, and substance flow; "XX's concentration" can be expressed in various ways such as volume fraction, mass concentration, and substance concentration. To proceed, it is only necessary to ensure that the dimensions are correct during the calculation.

[0053] In this embodiment, all "amount of XX" is mass, all "flow rate of XX" is mass flow, and all "concentration of XX" is mass concentration. SO X to SO 2 to count, the remaining types of SO X can be ignored.

[0054] An optimal control method for the overall economic benefit of a wet desulfurization device, which is used to minimize the sum of the material cost and energy consumption cost...

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Abstract

The invention relates to the technical field of waste gas purification by a semi-liquid phase method, and discloses a method for optimally controlling the overall economic benefit of a wet desulphurization device, which is used for minimizing the sum of the material cost and the energy consumption cost of the desulphurization device on the premise of ensuring the desulphurization effect when a gypsum method is adopted for desulphurization so as to realize the minimum index of the operation cost. The method comprises the following steps: step 1, controlling the flow and pH value of sprayed slurry in each slurry circulation loop by adopting a prediction controller, so that the desulfurization device operates in a state that the SOX concentration of flue gas at an outlet of an absorption tower is stabilized at a set value; wherein the prediction controller for controlling the flow of the spraying slurry is marked as a spraying quantity prediction controller, and the prediction controller for controlling the pH value of the spraying slurry is marked as a pH prediction controller; and step 2, adjusting set values in the spray quantity prediction controller and the pH prediction controller to minimize the sum of the material cost and the energy consumption cost of the desulfurization device.

Description

technical field [0001] The invention relates to the technical field of exhaust gas purification by a semi-liquid phase method, in particular to a method for optimal control of overall economic benefits of a wet desulfurization device. Background technique [0002] Note that "optimal control" is a term that refers to seeking a control to make a given system performance index reach a maximum value (or a minimum value) under a given constraint condition. [0003] Wet desulfurization using lime / limestone slurry as absorbent is the main method for flue gas desulfurization in coal-fired power plants. [0004] In the current desulfurization device, part of the slurry that has been in contact with the flue gas is mixed with the new slurry, and then pumped back to the absorption tower for spraying by a circulating pump, thereby increasing the liquid-gas ratio and making full use of the absorbent. The single-tower double-circulation device is the mainstream desulfurization device. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G16C20/10G16C20/30G06N3/00G06N3/04G06N3/12
CPCG16C20/10G16C20/30G06N3/006G06N3/04G06N3/126
Inventor 张启玖赵喆杨艳春
Owner BEIJING GUODIAN LONGYUAN ENVIRONMENTAL ENG
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