Ultrahigh-concentration-multiple circulating cooling water treatment system and circulating cooling water treatment method

Abstract

The invention discloses an ultrahigh-concentration-multiple circulating cooling water treatment system. The ultrahigh-concentration-multiple circulating cooling water treatment system comprises a circulating cooling water system and a bypath treatment system which is circularly connected with the circulating cooling water system, wherein the bypath treatment system comprises a filtering unit and a softening unit which are connected in sequence. The invention discloses a circulating cooling water treatment method. The circulating cooling water treatment method comprises the following steps: (1) concentrating circulating cooling water into ultrahigh-concentration-multiple circulating cooling water through the circulating cooling water system, wherein the concentration multiple reaches 20 to 1000 times; (2) filtering the ultrahigh-concentration-multiple circulating cooling water by adopting a bypass filtering method; and (3) softening the filtered ultrahigh-concentration-multiple circulating cooling water obtained by the step (2) by adopting an ion exchange method. According to the ultrahigh-concentration-multiple circulating cooling water treatment system and the circulating cooling water treatment method, the circulating cooling water is filtered and softened online through the bypath treatment system, and normal operation is realized under the condition of the ultrahigh-concentration-multiple circulating cooling water (with the concentration multiple of 20 to 1000 times); the water saving rate reaches 85 percent or more; and the corrosion prevention and microorganism inhibition effects, low cost, environment friendliness and feasibility are realized.

Description

technical field [0001] The invention relates to the technical field of circulating cooling water treatment, in particular to an ultra-high concentration multiple circulating cooling water treatment system and a circulating cooling water treatment method. Background technique [0002] Among the fresh water consumed by human beings, cooling water accounts for about 5%, which is second only to irrigation water. In industrial water, the amount of cooling water occupies the first place, generally more than 60%. The amount of cooling water in the chemical industry accounts for about 65%, and in the petroleum industry accounts for about 80%. In this way, cooling water becomes an important goal of water saving. It is found in the prior art that increasing the concentration multiple of the circulating cooling water system can reduce the consumption of supplementary circulating water, save water resources, and reduce the amount of sewage, thereby reducing environmental pollution and...

AI Technical Summary

Problems solved by technology

However, if the concentration ratio is increased too much in the actual operation process, the hardness, alkalinity and turbidity of the circulating water will rise too high, and the scaling tendency of the water will increase a lot, resulting in an increase in the thermal resistance of the circulating cooling water system. , heat transfer efficiency decreases, energy consumption increases

In the prior art, the operation problem of the above-mentioned high-concentration circulating cooling water is solved by softening the supplementary water, but the supplementary water softening device cannot provide timely water supply to the system during backwashing and regeneration, and it is necessary to invest in a spare unit to achieve the purpose of timely supplementation of water; in addition When the system does not need to replenish water, the softening device is still softening the water supply, so it is necessary to install a softening water tank and a lifting pump. These solutions all cause problems of high investment, large floor space, complicated control, and high operating costs.

[0007] For a long time, due to the limitation of circulating water treatment technology, due to the operation of circulating water under the condition of high concentration multiple, the operating water quality index exceeds the water quality conditions applicable to the circulating water treatment process or method, and the water treatment function fails.

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