Acidic descaling agent for cooling water system

A technology of cooling water system and descaling agent, which is applied in the field of chemical descaling agent and acidic descaling agent for cooling water system. Scaling ability, energy saving, and simplification of operating procedures

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

Corrosion inhibitors must be added before cleaning the system with these cleaning agents, and the operation procedure is complicated
What's more, the corrosion inhibition effect of the corrosion inhibitor is limited by the concentration of the pickling agent. If the operator is not experienced, the method of adding acid or corrosion inhibitor is not appropriate, resulting in too high local acid concentration or low local corrosion inhibitor concentration. , the metals in these parts will be severely corroded
[0004] In addition, commonly used acid cleaning agents can only be used to remove a certain scale layer, and the cleaning effect on the scale layer of a multi-component system is not obvious.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The descaling process in embodiment 1 cooling water system

[0019] According to the dirt status in the cooling water system, a reasonable formula of acidic descaling agent is prepared: 40% of hydroxyethylidene diphosphate, 28% of sodium phosphate, and 8% of sodium humate. The above substances are dissolved in water, mixed thoroughly, and set aside.

[0020] Confirm that the cooling water system has no serious corrosion failures, the entire system is in good circulation, and there is no dirt blockage. Separate the parts to be cleaned from other parts not to be cleaned to form a smooth circulation loop. Count the amount of circulating water and check the circulating loop to ensure no leakage.

[0021] Dilute the previously prepared acidic descaling agent according to the ratio of 1:8, measure the pH value regularly, control the pH value between 2-4.5, and add the acidic descaling agent when it exceeds 4.5. Keep the water pump circulating for the first 8 hours, then tur...

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PUM

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Abstract

The invention relates to an acidic descaling agent for cooling-water systems, which comprises hydroxy-ethidene diphosphoric acid, sumadil polyphosphate, sodium humate and water, the prepared agent has a pH of 2-4, and can remove carbonates, sulfates, rust scales and the deposit of other minerals.

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 cooling water system. Background technique [0002] After a long-term use of industrial cooling water systems, dirt of various components will usually be left in the system, which will gradually reduce the use efficiency. For example, the contact between cooling water and air absorbs a large amount of dust, sediment, microorganisms and their spores in the air, which increases the sludge in the system. Another example is the evaporation of water in the cooling tower, which gradually increases the salt content in the circulating water, and the carbon dioxide in the water is decomposed and dissipated in the tower, resulting in the gradual scaling of calcium carbonate in the water on the heat transfer surface. [0003] At present, domestic acidic chemical cleaning agents for cooling ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/08C02F5/14
Inventor 沈志昌
Owner SHANGHAI WANSEN WATER TREATMENT CO LTD
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