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Corrosion and scale inhibitor for treating circulating cooling water

A corrosion and scale inhibitor, circulating cooling water technology, applied in the field of corrosion and scale inhibitors, can solve the problems of high concentration, eutrophication of water body or unsatisfactory treatment effect, high phosphorus content, etc., to improve heat exchange effect, Excellent corrosion and scale inhibition performance, the effect of low phosphorus content

Inactive Publication Date: 2014-01-08
广东省石油化工研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Commonly used corrosion and scale inhibitors for central air-conditioning circulating cooling water include sodium hexametaphosphate, sodium tripolyphosphate, hydroxyethylidene diphosphonic acid (HEDP), aminotrimethylenephosphonic acid (ATMP), ethylenediaminetetramethylenephosphonic acid (EDTMP), diethylenetriaminepentamethylenephosphonic acid (DETAPMP), etc. These agents have high concentration and high phosphorus content, which may easily cause eutrophication of water bodies or unsatisfactory treatment effects. Therefore, a phosphorus Corrosion and scale inhibitors for hollow air conditioning circulating cooling water with low content and good treatment effect are of great significance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A corrosion and scale inhibitor for circulating cooling water treatment, its formulation is as follows:

[0023] Table 1: Formula composition of corrosion and scale inhibitors for circulating cooling water treatment

[0024] ingredients Dosage (g) PBTCA (effective content: 50%) 10.0 AA / AMPS (solid content: 30%) 20.0 PASP (solid content: 40%) 15.0 BTA 1.0 HEDP (effective content: 50%) 8.0 water 45.0

[0025] The preparation method of the corrosion and scale inhibitor is as follows: stirring each component evenly.

[0026] The prepared agent was carried out at a concentration of 60 mg / L, and the test of rotary coupon and scale inhibition test was carried out. The test results were: the corrosion rate of 20# steel was 0.065 mm / a, the corrosion rate of copper was 0.0019 mm / a, and the scale inhibition rate was 0.0019 mm / a. The rate is 91%.

Embodiment 2

[0028] A corrosion and scale inhibitor for circulating cooling water treatment, its formulation is as follows:

[0029] Table 2: Formula composition of corrosion and scale inhibitors for circulating cooling water treatment

[0030] ingredients Dosage (g) PBTCA (effective content: 50%) 5.0 AA / AMPS (solid content: 30%) 30.0 PASP (solid content: 40%) 35.0 BTA 2.0 water 28.0

[0031] The preparation method of the corrosion and scale inhibitor is as follows: stirring each component evenly.

[0032] The prepared agent was carried out at a concentration of 60 mg / L for the rotary coupon test and the scale inhibition test. The test results showed that the copper corrosion rate was 0.0009 mm / a, and the scale inhibition rate was 95%.

Embodiment 3

[0034] A corrosion and scale inhibitor for circulating cooling water treatment, its formulation is as follows:

[0035] Table 3: Formula composition of corrosion and scale inhibitors for circulating cooling water treatment

[0036] ingredients Dosage (Kg) PBTCA (effective content: 50%) 10.0 AA / AMPS (solid content: 30%) 60.0 PASP (solid content: 40%) 70.0 BTA 4.0 water 56.0

[0037] The preparation method of the corrosion and scale inhibitor is as follows: stirring each component evenly.

[0038] Apply the medicament prepared in Example 1 to the central air-conditioning circulating cooling water system. The installed capacity of the system is 4 sets of Trane DCWBRC2AAHBX, 2 sets of DCWEBLC2AAHBX, the refrigerant uses R134a, 11 cooling towers, and the temperature difference between the inlet and outlet of cooling water is 5.5- 6.5°C, the temperature difference between the inlet and outlet of chilled water is 4.5-5°C, 6 cooling...

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Abstract

The invention discloses a corrosion and scale inhibitor for treating circulating cooling water. The corrosion and scale inhibitor is composed of the following raw materials in percentage by mass: 3-15% of polyaspartic acid, 0-8% of organic phosphine, 2-10% of phosphine carboxylic acid, 5-10% of carboxyl group-containing polymer, 1-3% of copper corrosion inhibitor, 0-16% of zinc salt and the balance of water. The corrosion and scale inhibitor disclosed by the invention is low in phosphorus content and biodegradable, and no water body eutrophication is caused by pollution discharge; the corrosion and scale inhibitor has excellent corrosion and scale inhibition properties and can effectively improve the heat exchange effect of a central air conditioning refrigerating unit when being applied in a central air conditioning circulating cooling water system, the average temperature difference of a condenser is not larger than 1.0 DEG C and the average temperature difference of an evaporator is not larger than 2.4 DEG C, and thus safe, stable and economical operation of the unit is ensured.

Description

technical field [0001] The invention relates to a corrosion and scale inhibitor for circulating cooling water treatment. Background technique [0002] With the rapid development of industrial production, industrial water consumption has also increased rapidly. Among them, the consumption of cooling water accounts for more than 80% of the total industrial water consumption. During the use of cooling water, due to continuous circulation and continuous concentration, water The concentration of impurities, such as minerals, will continue to increase, which will easily cause scaling and corrosion of equipment and pipelines. At this time, it is necessary to add water quality treatment agents, such as corrosion and scale inhibitors, to the circulating cooling water to control the rate of scaling and corrosion. [0003] Taking the central air conditioner as an example, the cooling water system of the central air conditioner is characterized by a very small amount of water in the sy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/08C02F5/10C02F5/14
CPCC23F11/08C23F14/02
Inventor 文明通黄淋佳钟灵陈桧华张竞新蒋铭明冼业虎
Owner 广东省石油化工研究院
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