Method for controlling biological slime of clean circulating water system through physicochemical-superconduction high gradient magnetic separation (HGMS) coupled process

A technology for purifying circulating water and biological slime, which can be used in water treatment parameter control, chemical instruments and methods, special compound water treatment, etc. simple effect

Active Publication Date: 2019-11-12
UNIV OF SCI & TECH BEIJING +1
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of biological slime breeding in the existing industrial circulating cooling water system, the present invention provides a biological slime control method for the net circulating water system of the physicochemical-superconducting HGMS coupling process, so that the net circulating water system can run stably for a long time, reducing Pollutant discharge, energy saving, water saving and emission reduction

Method used

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  • Method for controlling biological slime of clean circulating water system through physicochemical-superconduction high gradient magnetic separation (HGMS) coupled process
  • Method for controlling biological slime of clean circulating water system through physicochemical-superconduction high gradient magnetic separation (HGMS) coupled process
  • Method for controlling biological slime of clean circulating water system through physicochemical-superconduction high gradient magnetic separation (HGMS) coupled process

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Experimental program
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Effect test

Embodiment 1

[0026] Taking the clean circulating water of the air separation system of an oxygen plant, which has the most stringent water quality requirements, as the research object, an industrial test is carried out. SS 21.5mg / L in raw water, at a magnetic field strength of 3.0T, flocculant (composed of 20-50% sodium silicate, 20-40% iron sulfate, 20-40% zinc sulfate and 5-30% sodium borate) was added Under the conditions of 30mg / L flow rate and 0.4-4mm / s flow rate, after flocculation-superconducting coupling treatment, a relatively ideal treatment effect is obtained, SS drops to 5mg / L or even undetected level, bacteria and algae are killed, such as figure 1 , figure 2 shown.

Embodiment 2

[0028] Taking the clean circulating water of the air separation system of an oxygen plant, which has the most stringent water quality requirements, as the research object, an industrial test is carried out. SS 4.37mg / L in raw water, at a magnetic field strength of 4.0T, flocculant (composed of 20-50% sodium silicate, 20-40% iron sulfate, 20-40% aluminum sulfate and 5-30% sodium borate) was added Under the conditions of 30mg / L flow rate and 0.4-4mm / s flow rate, after flocculation-superconducting coupling treatment, the ideal treatment effect was obtained, and SS dropped from 4.37mg / L to undetected level (see Table 1 below), and bacteria and algae were killed The killing effect is remarkable.

[0029] Table 1 Removal effect of SS in net circulating water of air separation system in oxygen plant

[0030]

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Abstract

The invention provides a method for controlling biological slime of a clean circulating water system through a physicochemical-superconduction high gradient magnetic separation (HGMS) coupled process,and belongs to the technical field of water treatment. The method comprises the steps: firstly, an inorganic efficient composite flocculant is added into circulating water, thus zoogloeae in the circulating water are demulsified from hydrosol together with fine micro-nano particles to form alum floc, and a flocculation effect is generated; and then the water after flocculation passes through thesuperconduction HGMS system, the magnetic field intensity and the flow rate are controlled, a strong magnetic flocculation effect is generated to enable flocs to grow quickly, thus the zoogloeae in the circulating water wrap the micro-nano-scale particles to be quickly separated and removed from the water, meanwhile the functions of sterilization and algae killing are achieved, and the purpose ofdeeply purifying the water quality is achieved. According to the method, breeding and adhesion of the biological slime on the surfaces of cooling equipment and a pipeline can be avoided from the source, thus the situation that scale is generated, and consequently the heat exchange effect is influenced can be avoided, and meanwhile generation of the scale and subscale corrosion is effectively avoided, and normal operation of production is guaranteed; and the water quality is stabilized, the concentration multiple is increased, and water conservation and energy conservation are achieved.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a method for controlling biological slime in a net circulating water system of a physicochemical-superconducting HGMS coupling process. Background technique [0002] Most industrial enterprises need high-temperature equipment in the production process, and the circulation cooling of the equipment becomes inevitable. For the open circulating cooling water system, during the operation of the water system, with the suction of the negative pressure of the cooling tower and the increase of the concentration factor, the content of micro-nano suspended particles gradually increases, which provides necessary conditions for the growth of bacteria and algae and the proliferation of microorganisms, and accelerates the cooling process. Bioslime formation. The biological slime formed will have a great impact on the normal, continuous and stable operation of the circulating cooling wa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/12
CPCC02F1/5281C02F1/5236C02F1/484C02F2209/10C02F2001/007C02F2303/04C02F2209/06C02F2209/05C02F2209/09C02F2305/08C02F2103/023C02F2303/20C02F2209/40
Inventor 李素芹韩帅帅赵鑫熊国宏
Owner UNIV OF SCI & TECH BEIJING
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