System and device for treating circulating cooling water by using lime softening and ozone

Abstract

The invention relates to a system for treating circulating cooling water by using lime softening and ozone. The system includes a lime softening treatment system, a circulating cooling water system using an ozone treatment technology, and a control system; the lime softening treatment system is sequentially provided with a mechanically accelerated sedimentation tank, a water collection tank and acooling tower, and a second automatic valve is arranged between the cooling tower and the mechanically accelerated sedimentation tank; the mechanically accelerated sedimentation tank communicates witha supplementary water source through a first automatic valve; a lime addition channel of the mechanically accelerated sedimentation tank is provided with a third automatic valve; an acid addition channel of the lime softening treatment system is provided with a fourth automatic control valve; and a first pH monitor is arranged in the mechanically accelerated sedimentation tank, and a second pH monitor is arranged at the rear end of the fourth automatic control valve. The system can reduce chemical precipitates caused by a high concentration multiple, circulating cooling water by-pass emergency treatment and supplementary water treatment can be automatically performed by monitoring water quality indexes, and the efficiency and economy of the operation of the system can be improved by controlling a lime addition process.

Description

technical field [0001] The invention relates to a water treatment system, in particular to a method and equipment for lime softening and ozone treatment of circulating cooling water. Background technique [0002] In the prior art, most of the chemical methods are used to inhibit the scale of the circulating cooling water. At the same time, in order to reduce the scaling in the water body, it is often accompanied by lime softening treatment. At present, there is a way to use ozone for scale and corrosion inhibition and sterilization of circulating cooling water. [0003] Using ozone, for the alkalinity in water (CO 3 2- and HCO 3 - ) content tolerance is high, ozone treatment of circulating cooling water can inhibit scale, corrosion, sterilization, algae, and increase the concentration multiple, water saving and emission reduction. When the hardness of the make-up water is high, increase the concentration ratio. Although there is no scaling, chemical precipitates are gen...

AI Technical Summary

Problems solved by technology

When the hardness of the make-up water is high, increase the concentration ratio. Although there is no scaling, chemical precipitates are generated and suspended in the cooling water. If they accumulate continuously, the heat exchange efficiency of the heat exchange equipment may be affected, and blockage will be formed at low flow rates.

Images