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Method for adjusting formula of circulating water scale and corrosion inhibitor on basis of calcium-alkali ratio of make-up water

A technology of scale and corrosion inhibitor, scale inhibitor, applied in chemical instruments and methods, water/sludge/sewage treatment, natural water treatment, etc. , to achieve the effect of enhancing the effect

Active Publication Date: 2021-08-13
CENT CHINA BRANCH OF CHINA DATANG CORP SCI & TECH RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, at present, the circulating water dynamic simulation test for screening the formula of scale and corrosion inhibitors often uses the supplementary water of the circulating water in a short period of time as the test water, and uses the test results as a reference for the operation control of the circulating water, which is not very representative
In addition, water quality is generally divided into negative hard water, temporary hard water, and permanent hard water. Different agents have different effects in different water qualities, so the formula is difficult to be the optimal formula for other water quality conditions.

Method used

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  • Method for adjusting formula of circulating water scale and corrosion inhibitor on basis of calcium-alkali ratio of make-up water
  • Method for adjusting formula of circulating water scale and corrosion inhibitor on basis of calcium-alkali ratio of make-up water
  • Method for adjusting formula of circulating water scale and corrosion inhibitor on basis of calcium-alkali ratio of make-up water

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Experimental program
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Effect test

Embodiment 1

[0029] The screening of embodiment 1 antiscalant monomer

[0030] The scale inhibitor information used in the present invention is shown in Table 1.

[0031] Table 1 Antiscalant information

[0032] serial number name abbreviation form Solid content 1 Amino trimethylene phosphonic acid ATMP liquid 50％ 2 Hydroxyethylene diphosphate HEDP liquid 50％ 3 Ethylenediaminetetramethylenephosphonic acid EDTMP liquid 18-20％ 4 sodium polyaspartate PASP liquid 40％ 5 polyepoxysuccinic acid PESA liquid 40％ 6 Hydrolyzed Polymaleic Anhydride HPMA liquid 48％ 7 Maleic acid-acrylic acid copolymer MA / AA liquid 48％ 8 Acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer AA / AMPS liquid 30％ 9 Tetrasodium iminodisuccinate IDS liquid 33-35％ 10 Polyacrylic acid PAAA liquid 30％ 11 Water Soluble Chitosan / solid 100％ 12 Sodium D-gluconate / solid 99％ ...

Embodiment 2

[0038] The screening of embodiment 2 antiscalant formula

[0039] A, B, C, and D represent organic phosphine antiscalant monomer ATMP, dispersed antiscalant monomer MA / AA, dispersed antiscalant monomer AA / AMPS, and dispersed antiscalant monomer PASP , the scheme is as follows:

[0040] (1) Determine the boundary of each antiscalant ratio (mixture component, that is, the ratio of a single antiscalant to the total amount of antiscalant), as shown in Table 2.

[0041] Table 2 The ratio range of each antiscalant

[0042]

[0043] (2) Mixing homogeneity test using simplex center of gravity design, as shown in Table 3.

[0044] Table 3 Experimental design table

[0045] Numbering A B C D 1 1 0 0 0 2 0 1 0 0 3 0 0 1 0 4 0 0 0 1 5 0.5 0.5 0 0 6 0.5 0 0.5 0 7 0.5 0 0 0.5 8 0 0.5 0.5 0 9 0 0.5 0 0.5 10 0 0 0.5 0.5 11 0.33 0.33 0.33 0 12 0.33 0.33 0 0.33 13 0.33 0 0.33...

Embodiment 3

[0121] The adjustment method of embodiment 3 antiscalant formula

[0122] Adjust the formula of scale and corrosion inhibitors for circulating water based on the calcium-alkaline ratio of supplemented water. The supplementary water of a certain power plant has two water sources: surface water and urban reclaimed water. Since the amount of urban reclaimed water is not fixed, the proportion of surface water and urban reclaimed water in the replenishment water varies greatly from day to day. The analysis of supplementary water quality is shown in Table 17.

[0123] Table 17 Water quality analysis of a power plant make-up water

[0124] Test items surface water Reclaimed water treatment system effluent Turbidity (NTU) 0.97 1.42 Conductivity (μS / cm) 698 1121 pH 8.0 8.1 Alkalinity of phenolphthalein (mmol / L) 0 0 Total Alkalinity (mmol / L) 2.76 2.15 Ca 2+ (as CaCO 3 Count) (mg / L)

98 350 Total hardness (as CaCO 3 Count...

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Abstract

The invention relates to a method for adjusting a formula of a circulating water scale and corrosion inhibitor on the basis of a calcium-alkali ratio of make-up water. The circulating water scale and corrosion inhibitor comprises an organic phosphine scale inhibitor A, namely amino trimethylene phosphonic acid (ATMP), a dispersed scale inhibitor B, namely maleic acid-acrylic acid copolymer (MA / AA), a dispersed scale inhibitor C, namely acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer (AA / AMPS), and a dispersed scale inhibitor D, namely sodium polyaspartate (PASP). The contents of different components in the circulating water scale and corrosion inhibitor are adjusted according to the calcium-alkali ratio of the make-up water, so that an optimal formula suitable for the water quality is obtained, and the action effect of the scale inhibitor is improved to the maximum extent.

Description

technical field [0001] The invention relates to a method for adjusting the formula of scale and corrosion inhibitors for circulating water based on the calcium-alkaline ratio of supplemented water, and belongs to the field of formulas for scale and corrosion inhibitors for circulating water. Background technique [0002] The scale and corrosion inhibitor treatment of circulating cooling water is mainly for open circulating cooling water, the purpose is to inhibit the scaling and corrosion of the system. Scale and corrosion inhibitors are often a compound formula, which contains a variety of agents. According to different water quality and system conditions, different compound ratios and dosages can be used to obtain the best effect. [0003] With the improvement of the country's environmental protection requirements and the implementation of secondary use of urban reclaimed water, more and more established power plants use urban reclaimed water from sewage treatment plants a...

Claims

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Application Information

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IPC IPC(8): C02F5/14C02F103/02
CPCC02F5/14C02F2303/08C02F2103/023
Inventor 牛犇徐华伟汪永威孙勇王浩杜艳超熊远南
Owner CENT CHINA BRANCH OF CHINA DATANG CORP SCI & TECH RES INST CO LTD
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