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System and method for controlling coupled-type salt balance of industrial water systems

A control system and coupled technology, applied in the field of water treatment, can solve problems such as reducing salt content, achieve the effects of reducing operating costs, promoting enterprise development, and achieving large economic and environmental benefits

Active Publication Date: 2010-03-10
SHOUGANG JINGTANG IRON & STEEL CO LTD +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since the amount of concentrated brine in the pre-type desalination system is too large, only part of it can be absorbed through dust suppression, slag flushing and slag simmering, so there is still a large amount of concentrated brine that still needs to be discharged to reduce the salt content of this system

Method used

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  • System and method for controlling coupled-type salt balance of industrial water systems
  • System and method for controlling coupled-type salt balance of industrial water systems
  • System and method for controlling coupled-type salt balance of industrial water systems

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Embodiment Construction

[0052] The circulating water volume of Shougang Jingtang Iron and Steel United Co., Ltd. R≈233000m 3 / h, the concentration factor is N.

[0053] Suppose the raw water quantity Q M1 (m 3 / h), salt content TDS 1 ≤235mg / L;

[0054] Seawater desalination water Q M2 (m 3 / h), salt content TDS 2 ≤5mg / L;

[0055] Then the salt content of the industrial water entering the system

[0056] Evaporation E(m 3 / h), salt content TDS E ≈0mg / L;

[0057] Water loss by wind W≈0.05% R=116m 3 / h, salt content TDS W = N·TDS;

[0058] Water consumption B≈304m for dust suppression, slag stewing, and slag flushing 3 / h.

[0059] Balanced by water volume, Q M1 +Q M2 =E+W+B=E+420(m 3 / h)………………(i)

[0060] (2) Salt balance

[0061] Amount of salt going into the system:

[0062] ①Industrial water supply: Q M1 × TDS 1 +Q M2 × TDS 2 =0.235Q M1 +0.005Q M2 (kg / h)

[0063] ②The amount of charge, coagulant, water quality stabilizer, etc. brought in: 18.5+48+63=129.5(kg / h)

[0064...

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Abstract

The invention provides a system and a method for controlling the coupled-type salt balance of industrial water systems, which belongs to the technical field of water treatment. Through a set mathematical model and a control system, the salt balance of industrial water systems is intelligently controlled. The mathematical model and the control system input all data which are continuously acquired and related to salt content into a PLC or an industrial control computer, and then transmit optimized signals of the amount of raw clean water and desalinated seawater to a raw-water treatment controlsystem and a seawater desalination control system respectively and perform regulation. Therefore, the reduction of salt content relies on high-quality desalinated seawater and ground-surface raw wateradded with water for neutralization and dilution, and the concentration multiple of water systems is controlled between 4 and 6 so as to realize the zero emission of industrial water and circular economy and effectively reduce operation cost. The invention ensures that enterprises can use limited investment to gain great economic and environmental benefit. In addition, the invention greatly benefits the promotion of enterprise development and environmental protection.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a control system and a control method for a coupled salt balance of an industrial water system, which are suitable for optimal water distribution and zero discharge of seawater desalination and raw water. Background technique [0002] Due to the increasing shortage of water resources, in order to save water and improve the reuse rate of water resources in the entire iron and steel plant, iron and steel companies, which are large water users, have successively invested in sewage treatment plants to reuse the treated water in order to save water. At the same time, due to factors such as concentration and evaporation of the entire steel plant water system, the sewage water entering the sewage treatment plant has complex water quality and high salt content, and the sewage without deep desalination treatment is reused, resulting in an increase in the salt content of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/418C02F1/00C02F103/08
CPCY02P90/02
Inventor 吴礼云李杨张建红寇彦德陈志新
Owner SHOUGANG JINGTANG IRON & STEEL CO LTD
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