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A cleaning method for chemical tube heat exchanger

A tubular heat exchanger and cleaning method technology, applied in the field of heat exchanger cleaning, can solve problems such as difficult to obtain cleaning effect, insufficient circulation, incomplete drainage, etc., achieve fast cleaning efficiency, increase service life, and facilitate purchase Effect

Active Publication Date: 2020-09-25
江苏安泰安全技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the untimely dosing, insufficient circulation, and even incomplete drainage, the scale and corrosion of the equipment are caused to varying degrees, and regular cleaning is required.
The current cleaning method is difficult to obtain a good cleaning effect, and the efficiency is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0013] A cleaning method for a chemical heat exchanger according to the present invention, the cleaning method is as follows:

[0014] 1) Water washing: clean the pipeline, block one end of the pipeline, fill the pipeline with water at a certain pressure, soak for 60-120min, drain the water in the pipeline, and rinse the pipeline with high-pressure water intermittently. less than 30min;

[0015] 2) Pickling: Prepare a pickling solution including nitric acid with a mass fraction of 5-15% and a LAN-826 corrosion inhibitor with a mass fraction of 0.35%; circulate the pickling solution at 40-50° and keep it at 10 -20min, and discharge the acid solution, wash with mixed acid solution, respectively take nitric acid with a mass fraction of 10-12%, hydrochloric acid with a mass fraction of 10-12%, citric acid with a mass fraction of 5-6%, and a mass fraction of 0.25 % LAN-826 corrosion inhibitor; circulate and clean the mixed acid solution at 50-60°, keep it at 10-20min, and discharg...

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PUM

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Abstract

The invention discloses a cleaning method of a chemical tubular heat exchanger. The cleaning method comprises the following steps that soaking and washing by water are carried out, after pickling is carried out twice, rinsing and passivating treatment are carried out, finally flushing is carried out, and a time interval is reserved between two times of pickling so as to improve effect of the firstpickling. According to the cleaning method of the chemical tubular heat exchanger, equipment is simple, the investment is small, the operation is simple, and cleaning drugs are all common chemical reagents convenient to purchase; the cleaning is thorough, and the cleaning efficiency is high; and a pipeline is subjected to passivating treatment, so that the cleaned pipeline is not easy to corrodeand the service life of the pipeline in the heat exchanger is prolonged.

Description

technical field [0001] The invention belongs to a cleaning method of a heat exchanger, in particular to a cleaning method of a chemical tube heat exchanger. Background technique [0002] The circulating water cooling system is a system for cooling and water quality treatment of the cooling water recycled in the industrial sector. The recycled cooling water is called circulating water. In the process of cooling production equipment or products, the temperature of the cooling water rises. Although its physical properties do not change much, after long-term recycling, some dissolved substances in the water will condense or disappear. The accumulation of dust and the growth of microorganisms will cause scale deposition in equipment and pipelines or corrosion of metal equipment and pipelines. Especially on the surface of the transducer, there will be a large amount of sediment attached, which will greatly reduce the conduction efficiency, and will cause corrosion of scale, resul...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F28G9/00
CPCF28G9/00
Inventor 王锡涛
Owner 江苏安泰安全技术有限公司