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Environmentally friendly water pipe cleaning and coating treatment method

A treatment method and an environmentally friendly technology, applied in the field of water system pipeline treatment, can solve the problems of reduced cooling capacity, evaporator pressure drop, and excessive power consumption, and achieve the effect of accelerating the reaction speed

Active Publication Date: 2020-09-18
SHANGHAI EMPEROR OF CLEANING HI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Tests show that scale with a thickness of 1mm will reduce the cooling capacity of the unit by 20-40%, increase the condensing pressure and decrease the pressure of the evaporator, increase the load of the motor, and consume 10-30% more power

Method used

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  • Environmentally friendly water pipe cleaning and coating treatment method
  • Environmentally friendly water pipe cleaning and coating treatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] The environmental-friendly water pipe cleaning and coating treatment method of this embodiment washes and cleans the cold and hot pipe networks, and chemically treats the waste liquid after cleaning and coating. Because there is a spare pipe for hot water, it needs to be connected to the original water supply or return pipe for rinsing, cleaning and coating cycle.

[0051] Since no chemicals are added in the water flushing stage, no water quality treatment is required, and the flushing water is discharged on the spot. In the cleaning and coating stage, a cleaning and coating agent is used, and calcium hydroxide + cyclohexylamine method is used to treat phosphorus-containing wastewater.

[0052] The treatment method of this example is used to clean and coat the paint slag of the pipe network of the frozen water hole hot water system in an amusement park in East China, and to chemically treat the waste liquid after cleaning and coating, so as to meet the requirements of t...

Embodiment 2

[0120] In this embodiment, the cold and hot pipe network of this embodiment washes and cleans the coating film, and carries out chemical treatment technology to the waste liquid after cleaning the coating film. The project objectives are:

[0121] (1) Complete the cleaning work of the main network, the cleaning water quality target is less than 20NTU, and the iron ion is less than 2ppm.

[0122] (2) Drainage in the process of adding tap water to degreasing meets GB3838-2002 "National Surface Water Environmental Quality Standard".

[0123] (3) Add desalinated water to clean the coating and the coating reaches the national standard.

[0124] (4) Clean the coating After the coating is finished, replenish the desalinated water in the cold storage tank, add bactericides, corrosion and scale inhibitors and color chemicals to ensure that the corrosion rates of copper and carbon steel in the pipe network system are 0.1MPY and 1.0MPY respectively. Finally, the normal operation of the ...

Embodiment 3

[0148] This embodiment is basically the same as Embodiment 1, except that in this embodiment, the cleaning and coating agent is composed of the following components in weight percent: 8.5% trisodium phosphate, 0.7% lanthanum nitrate, 5.0% sodium molybdate, Zinc salt 20%, the rest is water.

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Abstract

The invention relates to an environment-friendly water pipe cleaning coating treatment method. The environment-friendly water pipe cleaning coating treatment method comprises the steps that water washing and chemical cleaning coating are sequentially conducted on a water system pipeline, and coating waste water generated through chemical cleaning coating is treated with calcium hydroxide and cyclohexylamine, wherein a cleaning coating agent adopted in chemical cleaning coating comprises trisodium phosphate, lanthanum nitrate and sodium molybdate. Compared with the prior art, the cost is low, operation energy consumption is low, and the cost is low.

Description

technical field [0001] The invention belongs to the technical field of water system pipeline treatment, and relates to water pipe pre-film treatment, in particular to an environment-friendly water pipe cleaning and coating treatment method. Background technique [0002] Three major problems caused by circulating water. 1. Metal corrosion caused by dissolved oxygen; 2. Scaling caused by calcium and magnesium ions in water; 3. Microbial corrosion caused by fungi and algae. The direct consequences of the three major problems mentioned above are that the water quality of the water system becomes black and smelly, equipment pipelines are blocked, high pressure failures, and pipelines are scrapped in a short time, all of which cause huge economic losses to the user. [0003] For the newly installed water system, there are often a large amount of anti-rust oil, welding slag, corrosion and other chemical substances that cannot be washed away by water attached to the inner wall of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23G1/26C23C22/68C02F9/04
CPCC02F1/5236C02F1/66C23C22/68C23G1/26
Inventor 王炜
Owner SHANGHAI EMPEROR OF CLEANING HI TECH
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