Automatic control device and a control method for the concentration ratio of industrial circulating water

Abstract

The invention discloses an automatic control device and a control method for the concentration ratio of industrial circulating water. The device comprises a sampling unit, a pollution discharge unit and a control unit, the sampling unit comprises a fouling resistance on-line measuring instrument, a circulating water salt content on-line measuring instrument, a make-up water salt content on-line measuring instrument and a sampling pipe; the sampling pipe is sequentially connected with a dirt thermal resistance on-line measuring instrument, a circulating water salt content on-line measuring instrument and a water basin of the industrial circulating water tower; the make-up water salt content online measuring instrument is arranged on a circulating water make-up pipeline of the industrial circulating water tower; the blowdown unit comprises a blowdown pipe, and the blowdown pipe is arranged on a water outlet pipe of the circulating water salt content online measuring instrument; and the control unit comprises a touch screen and a PLC (Programmable Logic Controller); the PLC is electrically connected with the make-up water salt content on-line measuring instrument and the circulating water salt content on-line measuring instrument. According to the method disclosed by the invention, automatic control on the concentration ratio of the industrial circulating water can be conveniently realized without manual intervention.

Description

technical field [0001] The invention relates to the technical field of concentration ratio sewage discharge in industrial circulating water, in particular to an automatic control device and control method for concentration ratio of industrial circulating water. Background technique [0002] At present, the operation and management of most industrial circulating water systems are very extensive. The control of circulating water concentration rate still adopts manual operation of circulating water sewage gate, which is difficult to deal with the changes in the field. There is a large lag in data results, and it is impossible to accurately control the concentration rate of sewage discharge. Manual control of sewage discharge can easily lead to insufficient or excessive sewage discharge, resulting in too high or too low concentration ratio. If the concentration ratio is too high, the risk of fouling and corrosion in the system will increase, resulting in scaling and corrosion fa...

AI Technical Summary

Problems solved by technology

[0002] At present, the operation and management of most industrial circulating water systems are very extensive, and the concentration ratio of circulating water is still controlled by manual operation of the circulating water sewage gate, which is difficult to deal with changes in the field. There is a large lag in the data results, and the concentration ratio cannot be accurately controlled.

Manual control of sewage discharge can easily lead to insufficient or excessive sewage discharge, resulting in too high or too low concentration ratio

If the concentration ratio is too high, the risk of fouling and corrosion in the system will increase, resulting in scaling and corrosion failures of equipment, resulting in economic losses; if the concentration ratio is too low, the utilization rate of circulating water will be reduced, which may increase the operating risk or Exceeding discharge standards, resulting in waste of water resources

[0003] Due to changes in unit load, external temperature and atmospheric humidity, etc., the concentration ratio of industrial circulating water will be affected. At the same time, the circulating water system itself has too much hysteresis, which makes it impossible for operators to accurately control the amount of sewage discharge, and at the same time increases the labor intensity of workers. , creating a safety hazard

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