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Cleaning agent for domestic heating system composed of various metal materials and preparation method thereof

A technology for heating systems and metal materials, applied in the field of cleaning agents, can solve problems such as poor control of end points, metal corrosion, and danger, and achieve the effects of preventing low heat transfer efficiency, avoiding pipeline fouling, and reducing energy saving and consumption.

Active Publication Date: 2016-02-03
SHANGHAI INDAL BOILER RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After cleaning with this kind of cleaning agent, the basic performance of the equipment can be improved and restored, but the end point is not easy to control, there is a certain risk, and it is not suitable for home heating systems composed of various metal materials; in addition, long-term acid and alkali cleaning Agents corrode the metal of the equipment and shorten the life of the equipment; moreover, the acid and alkali cleaning operation procedures are complicated, and neutralization treatment is required after cleaning, followed by passivation, which makes the cleaning time of the equipment longer and affects the normal operation of the equipment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The components and weight percentages of the cleaning agent in this embodiment are as follows: 10% propylene glycol, 1.0% benzotriazole, 1.5% hydroxyethylidene diphosphonic acid, 2.0% sulfamic acid, ethylenediaminetetramethylenephosphine Sodium acid 15%, the balance of desalinated water.

[0021] The components with the above-mentioned weight percentage content are added respectively, and the finished product is obtained after being fully stirred evenly.

[0022] The finished product in this example is a brownish yellow or light yellow liquid, with a pH (concentrated solution) of 5.6±0.2 and a specific gravity (g / ml, 20° C.) of 1.10±0.10.

[0023] Experimental data: Measured with reference to GB / T25148-2010 "Test Method for Descaling Rate and Cleaning Rate in Chemical Cleaning of Industrial Equipment", the descaling rate of this cleaning agent is 95.2%; refer to GB / T25147-2010 "Chemical Cleaning of Industrial Equipment The test method of metal corrosion rate and total ...

Embodiment 2

[0025] The components of the cleaning agent and their weight percent content in the present embodiment are as follows: propylene glycol 10%, benzotriazole 1.5%, sodium molybdate 1.0%, sulfamic acid 1.5%, sodium ethylenediamine tetramethylene phosphonate 18% %, the balance of desalinated water.

[0026] Its preparation method is with embodiment 1

[0027] Experimental data: Measured with reference to GB / T25148-2010 "Test Method for Descaling Rate and Cleaning Rate in Chemical Cleaning of Industrial Equipment", the descaling rate of this cleaning agent is 96.5%; refer to GB / T25147-2010 "Chemical Cleaning of Industrial Equipment The test method of metal corrosion rate and total corrosion weight method "measures the corrosion rate of the cleaning agent on various metals: carbon steel: 1.62g / m 2 h. Stainless steel: 0.63g / m 2 h. Copper: 0.61g / m 2 h. Aluminum: 0.85g / m 2 h, in line with the provisions of GB / T25146 "Industrial Equipment Chemical Cleaning Quality Acceptance Regulati...

Embodiment 3

[0029] In this embodiment, the water quality protection agent contains components and weight percentages as follows: propylene glycol 10%, benzotriazole 2.0%, hydroxyethylidene diphosphonic acid 1.5%, sulfamic acid 1.5%, ethylenediamine tetramethylene phosphine Sodium acid 15%, the balance of desalinated water.

[0030] Preparation method is the same as embodiment 1

[0031] Experimental data: According to GB / T25148-2010 "Test Method for Descaling Rate and Cleaning Rate in Chemical Cleaning of Industrial Equipment", the descaling rate of this cleaning agent is 97.1; refer to GB / T25147-2010 "Industrial Equipment Chemical Cleaning The test method of metal corrosion rate and total corrosion weight method is measured, and the corrosion rate of the cleaning agent to various metals is: carbon steel: 1.72g / m 2 h. Stainless steel: 0.61g / m 2 h. Copper: 0.54g / m 2 h. Aluminum: 0.87g / m 2 h, in line with the provisions of GB / T25146 "Industrial Equipment Chemical Cleaning Quality Accept...

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Abstract

The invention relates to a cleaning agent for a household heating system consisting of various metal materials. The cleaning agent comprises the following components in percentage by weight: 3-20 percent of propylene glycol, 2.5-10 percent of a corrosion inhibitor, 0.1-5 percent of sulphamic acid, 5-25 percent of ethylene diamine tetra and the balance of demineralized water. The invention also provides a preparation method of the cleaning agent. The cleaning agent disclosed by the invention is compounded of an organic anti-scaling component and an organic acid and can effectively strip off and dissolve old scales in the household heating system equipment and prevent secondary water scales; the cleaning agent can effectively alleviate corrosion to metal materials of the household heating system equipment, effectively remove the water scales, rust slag and the like from the household heating system equipment and solve such problems of the household heating system caused by scaling as low heat transmission efficiency or water circulation blocking, so that all equipment in the whole household heating system can operate safely and economically, and the aims of reducing water pollution, saving energy and reducing consumption are fulfilled.

Description

technical field [0001] The invention relates to a cleaning agent, in particular to a cleaning agent for a household heating system composed of various metal materials and a preparation method thereof. Background technique [0002] The characteristics of small-scale household heating systems are: high local temperature and thin pipelines in the system, which can easily cause fouling in the system and lead to pipeline blockage and other phenomena. Therefore, in order to prevent the thermal cycle from being blocked due to system blockage, it is extremely important to clean the system from welding slag and residues before use, and to regularly descale and clean the system. [0003] At present, the main cleaning methods are: mechanical descaling, high-pressure water cleaning and chemical cleaning. Many of the first two cleaning methods are manual operations with high labor intensity. They are basically a coarse ore-type operation method with poor applicability and are not applic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23G1/26C02F5/10
Inventor 田瑞珍沈欣杨麟
Owner SHANGHAI INDAL BOILER RES INST
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