Circulating water concentration ratio automatic control system and control method

A technology of automatic control system and concentration rate, applied in the direction of control/adjustment system, multiple fluid ratio control, ratio control, etc., can solve the problem of circulating cooling water exceeding the control range, so as to avoid random errors and data discontinuity, water quality The effect of parameter enrichment, avoiding safety and economic problems

Pending Publication Date: 2019-01-18
XIAN THERMAL POWER RES INST CO LTD
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Problems solved by technology

[0006] In order to solve the above-mentioned problems in the prior art, the object of the present invention is to provide an automatic control system and method for the concentration ratio of circulating water, which can effectively avoid safety and economic problems caused by manual control of circulating cooling water beyond the control range

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  • Circulating water concentration ratio automatic control system and control method

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Embodiment Construction

[0016] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0017] Such as figure 1 As shown, the present invention relates to an automatic control system for the concentration rate of circulating water. A first water quality on-line monitoring instrument 2 is provided on the supplementary water pipeline 1, and a second water quality on-line monitoring instrument 4 and a PCL control instrument are sequentially provided on the sewage pipeline 3. The electric regulating valve 5 of the device 6; the measurement data of the first water quality online monitoring instrument 2 is output to the PLC controller 6; the measurement data of the second water quality online monitoring instrument 4 is output to the PLC controller 6.

[0018] The working principle of the present invention is: the first water quality on-line monitoring instrument 2 and the second water quality on-line monitoring instrument 4 transmit the collected data...

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Abstract

The invention discloses a circulating water concentration ratio automatic control system and a control method. The system comprises a PLC, a water quality online monitoring instrument and an electricregulating valve, wherein the water quality online monitoring instrument is respectively mounted on a circulating water make-up water pipeline and a drainage pipeline, and the circulating water drainage pipeline is provided with the electric regulating valve comprising the PLC; and the control method of the system can realize automatic control for circulating water concentration ratio of a power plant; the water quality online monitoring instrument transmits a measured value to the PLC, the PLC calculates out the circulating water concentration ratio according to the measured value of the water quality online monitoring instrument and adjusts aperture of the electric regulating valve, thus, the circulating water concentration ratio is controlled in a required range, and automatic control for the circulating water concentration ratio is realized.

Description

technical field [0001] The invention relates to an open circulating cooling water system in a power plant, in particular to an automatic control system and method for the concentration ratio of circulating water. Background technique [0002] The open circulating cooling water system refers to a treatment system in which the cooling water heated up by the heat exchange of the heat exchanger is in direct contact with the atmosphere in the cooling tower, then evaporatively cooled through the cooling tower and the atmosphere, and then recycled. This system is currently the most widely used cooling system. The cooling water operates in a highly concentrated state. By continuously replenishing new water to balance the amount of water lost in evaporation, wind blowing loss and sewage discharge process, a high degree of repetition of cooling water is achieved. use. [0003] The concentration ratio of circulating water refers to the ratio of the content of a certain substance conce...

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Application Information

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IPC IPC(8): G05D11/13
CPCG05D11/139
Inventor 刘玮潘珺田利龙国军张维科王广珠
Owner XIAN THERMAL POWER RES INST CO LTD
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