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Cleaning solution suitable for plate heat exchanger and preparation method thereof

A technology of plate heat exchanger and cleaning liquid, which is applied in the field of cleaning liquid, and can solve problems such as high water pressure, difficulty in achieving cleaning effect, and veneer cleaning

Active Publication Date: 2021-08-24
HUANENG JINAN HUANGTAI POWER GENERATION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The first is mechanical cleaning, which is usually high-pressure water cleaning. The water is pressurized by a high-pressure cleaner to clean the inner wall of the heat exchanger tube. This cleaning method has high water pressure and is difficult to operate. Moreover, the structure of the plate heat exchanger tube It is relatively complicated, and it is difficult to achieve the expected cleaning effect. Usually, the plate heat exchanger needs to be disassembled to clean the single plate, which is labor-intensive, labor-intensive and time-consuming.
[0005] The second is conventional chemical cleaning. The chemical cleaning agent is poured into the heat exchanger to perform bubbling cycle cleaning. The traditional chemical cleaning liquid reacts chemically with the attachment layer, resulting in a large consumption of chemical cleaning liquid. At the same time, chemical cleaning liquid and The reaction product of the attachment layer will form an isolation layer and affect the further progress of the chemical reaction, resulting in a decrease in cleaning efficiency

Method used

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  • Cleaning solution suitable for plate heat exchanger and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The preparation method of the cleaning liquid suitable for plate heat exchangers, the specific steps are as follows:

[0033] (1) First crush the glass into glass powder, then make the glass powder into glass microspheres, corrode to obtain porous glass microspheres, and then use N-(β-aminoethyl)-γ-aminopropylmethyl di Methoxysilane is modified to obtain modified porous glass beads;

[0034] (2) Then the isocyanate-terminated prepolymer is added to the dispersion liquid, dispersed, and modified porous glass beads are added during the dispersion process to obtain polyurethane-porous glass composite beads;

[0035] (3) Dissolve ethylenediaminetetraacetic acid in boiling water, cool naturally to room temperature, add sulfamic acid, citric acid, copper sulfate, stir until dissolved, then add 1-aminoethyl-3-methylimidazole bis( Trifluoromethanesulfonyl) imide salt, ultrasonically dispersed evenly to obtain a premixed solution;

[0036] (4) Finally, add ferric ferrocyanide ...

Embodiment 2

[0048] The preparation method of the cleaning liquid suitable for plate heat exchangers, the specific steps are as follows:

[0049] (1) First crush the glass into glass powder, then make the glass powder into glass microspheres, corrode to obtain porous glass microspheres, and then use N-(β-aminoethyl)-γ-aminopropylmethyl di Methoxysilane is modified to obtain modified porous glass beads;

[0050] (2) Then the isocyanate-terminated prepolymer is added to the dispersion liquid, dispersed, and modified porous glass beads are added during the dispersion process to obtain polyurethane-porous glass composite beads;

[0051] (3) Dissolve ethylenediaminetetraacetic acid in boiling water, cool naturally to room temperature, add sulfamic acid, citric acid, copper sulfate, stir until dissolved, then add 1-aminoethyl-3-methylimidazole bis( Trifluoromethanesulfonyl) imide salt, ultrasonically dispersed evenly to obtain a premixed solution;

[0052] (4) Finally, add ferric ferrocyanide ...

Embodiment 3

[0064] The preparation method of the cleaning liquid suitable for plate heat exchangers, the specific steps are as follows:

[0065] (1) First crush the glass into glass powder, then make the glass powder into glass microspheres, corrode to obtain porous glass microspheres, and then use N-(β-aminoethyl)-γ-aminopropylmethyl di Methoxysilane is modified to obtain modified porous glass beads;

[0066] (2) Then the isocyanate-terminated prepolymer is added to the dispersion liquid, dispersed, and modified porous glass beads are added during the dispersion process to obtain polyurethane-porous glass composite beads;

[0067] (3) Dissolve ethylenediaminetetraacetic acid in boiling water, cool naturally to room temperature, add sulfamic acid, citric acid, copper sulfate, stir until dissolved, then add 1-aminoethyl-3-methylimidazole bis( Trifluoromethanesulfonyl) imide salt, ultrasonically dispersed evenly to obtain a premixed solution;

[0068] (4) Finally, add ferric ferrocyanide ...

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Abstract

The invention discloses a cleaning solution suitable for a plate heat exchanger and a preparation method thereof. The preparation method comprises the steps: preparing glass into porous glass beads, then performing modification treatment and obtaining modified porous glass beads; then adding the isocyanate-terminated prepolymer into the dispersion liquid, carrying out dispersion treatment, and adding the modified porous glass beads in the dispersion process to obtain polyurethane-porous glass composite beads; dissolving ethylenediamine tetraacetic acid in boiling water, naturally cooling to room temperature, adding sulfamic acid, citric acid and copper sulfate, stirring until the materials are dissolved, then adding 1-aminoethyl-3-methylimidazolium bis (trifluoromethanesulfonyl) imine salt, and ultrasonically dispersing uniformly to obtain a premixed solution; and finally, adding iron ferrocyanide and polyurethane-porous glass composite microbeads into the premixed liquid while stirring, and carrying out homogenization treatment so as to obtain the cleaning liquid. The cleaning solution is convenient to use, and can be directly introduced into the plate heat exchanger in a pulse cleaning manner so that the plate heat exchanger can be effectively cleaned on the basis of not disassembling the plate heat exchanger.

Description

technical field [0001] The invention relates to a cleaning liquid, in particular to a cleaning liquid suitable for plate heat exchangers and a preparation method thereof. Belongs to the technical field. Background technique [0002] Plate heat exchanger is a high-efficiency heat exchange equipment widely used in chemical industry, electric power, thermal power and other industries. It has the characteristics of small footprint and high heat transfer coefficient. During the operation of the plate heat exchanger, calcium carbonate, magnesium carbonate, rust mud and other deposits will be produced on the plate due to the influence of impurities in the working medium, temperature changes of chemical composition, etc. The thermal conductivity of these attachments is much lower than that of the metal plate, resulting in a decrease in the heat transfer efficiency of the plate heat exchanger, an increase in pressure loss, and corrosion of the plate. Therefore, the plate heat excha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11D7/32C11D7/20C11D7/02C11D7/10C11D7/26C11D7/34C11D7/60
CPCC11D7/3281C11D7/3254C11D7/20C11D7/02C11D7/10C11D7/265C11D7/34Y02P20/10
Inventor 徐睿刘轩夏祥伟徐行郝婧霖
Owner HUANENG JINAN HUANGTAI POWER GENERATION CO LTD
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