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Acid descaling agent for central air conditioner circulating water

A circulating water system and central air-conditioning technology, applied in the fields of chemical descaling agents and acidic descaling agents for central air-conditioning circulating water systems, can solve the problems of ineffective corrosion inhibition, cumbersome corrosion inhibition process, difficult control and operation, etc., to achieve Quick removal, low cost, easy operation effect

Inactive Publication Date: 2006-04-05
SHANGHAI WANSEN WATER TREATMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, hydrochloric acid is a strong acid, and a corrosion inhibitor must be added before use, and the corrosion inhibition step often has the problems that the corrosion inhibition effect is not obvious, the corrosion inhibition process is cumbersome, and it is difficult to control and operate.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1 Central air-conditioning circulating water system circulation cleaning method

[0016] 1. Dilute the acidic descaling agent of the present invention at a dilution ratio of 1:10.

[0017] ② Conduct a comprehensive inspection of the system to be cleaned, and confirm that the water flow in the parts to be cleaned is smooth and there is no fault.

[0018] ③ Separate the parts to be cleaned from other parts that are not to be cleaned, and connect temporary pipelines and dosing barrels to form a circulation loop. If there is no circulation pump itself, connect the circulation pump externally.

[0019] ④ Count the amount of circulating water and check whether there is any leakage in the circulating circuit.

[0020] ⑤ Add the agent, measure the pH every half an hour, control the pH between 2.5-4.5, and add the descaling agent when the pH is > 4.5. Keep the water pump circulating for the first 8 hours, then turn off the pump and soak statically for 10 hours, and...

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PUM

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Abstract

The present invention pertains to the field of chemical industry, wherein an acidic scale remover for the circulating water system of central air-conditioners is disclosed, which comprises ethylenediamine tetra-acetic acid, sodium humate, polyphosphates and water, its pH is 2-3.5. The scale remover can be used for effectively removing carbonate scale and rust scale.

Description

technical field [0001] The invention belongs to the field of chemical industry, and relates to a chemical descaling agent, more specifically, the invention relates to an acidic descaling agent for a central air-conditioning circulating water system. Background technique [0002] At present, hydrochloric acid is the most widely used acidic chemical cleaning agent for the central air-conditioning circulating water system in China. Hydrochloric acid can effectively clean away hard scales composed of alkaline earth metal carbonates and corrosion products composed of metal oxides in metal equipment, and it can react with metal carbonates or oxides to convert them into soluble metals salt. However, hydrochloric acid is a strong acid, and a corrosion inhibitor must be added before use, and the corrosion inhibition step often has the problems that the corrosion inhibition effect is not obvious, the corrosion inhibition process is cumbersome, difficult to control and operate. [00...

Claims

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Application Information

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IPC IPC(8): C02F5/08C02F5/12C02F5/14
Inventor 沈志昌
Owner SHANGHAI WANSEN WATER TREATMENT CO LTD
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