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Wet desulphurization spraying amount and spraying slurry pH value coupling control optimization method

A wet desulfurization and optimization method technology, applied in the direction of chemical variable control, non-electrical variable control, multiple fluid ratio control, etc., can solve the problem that the flow rate of slurry supply and spraying amount exceed the actual demand, so as to reduce the quantity and improve Energy efficiency and low operating costs

Active Publication Date: 2021-11-16
BEIJING GUODIAN LONGYUAN ENVIRONMENTAL ENG +1
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Problems solved by technology

When coupling control is involved, how to reduce energy consumption and material consumption on the premise of ensuring the desulfurization effect becomes more complicated. At present, there is no method to optimize the coupling control. Slurry flow rate and spray volume both seriously exceed the actual demand

Method used

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Embodiment Construction

[0034] 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.

[0035] 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.

[0036] A coupling control optimization method for wet desulfurization spray volume and spray slurry pH value, which is used to minimize the operating cost of the desulfurization dev...

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Abstract

The invention relates to the technical field of waste gas purification through a semi-liquid phase method, and discloses a wet desulphurization spraying amount and spraying slurry pH value coupling control optimization method which is used for controlling the pH value of spraying slurry in a slurry circulation loop when a gypsum method is adopted for desulphurization. The influence of each manipulated variable in the desulfurization device on the desulfurization effect and the operation cost is solved through fractional factorial design, and then the combination of manipulated variables enabling the operation cost of the whole desulfurization device to be the lowest is solved by using an optimization algorithm on the premise of meeting the desulfurization effect, so that the pressure red line operation of the whole desulfurization device is realized, and the operation cost is the lowest; according to the method, the frequency of the variable-frequency circulating pump is as low as possible by adopting a closed-loop replacement method, so that the allowance for quick adjustment after the SOX content at the outlet of the desulfurization device fluctuates is reserved, and quick adjustment can be realized by increasing the frequency of the variable-frequency pump after the SOX load in the flue gas is increased.

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 coupling control optimization method for wet desulfurization spray volume and spray slurry pH value. Background technique [0002] Wet desulfurization using lime / limestone slurry as absorbent is the main method for flue gas desulfurization in coal-fired power plants. [0003] 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. The absorption tower is divided into two sections by the collection bowl, and each section is equipped with a set of slurry circulation loops. In the two slurry circulation loops, the pH valu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05D21/02
CPCG05D21/02
Inventor 张启玖杨艳春曾德良胡勇张艳江
Owner BEIJING GUODIAN LONGYUAN ENVIRONMENTAL ENG
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