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Method for testing scale and corrosion inhibition performance of reagent and apparatus for boiler water treatment

A technology for water treatment equipment and treatment chemicals, which is used in water/sewage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., and can solve the problem of lack of testing methods and means.

Inactive Publication Date: 2005-11-23
TIANJIN CHEM RES & DESIGN INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As for the detection and evaluation of the actual treatment effect in the furnace of water treatment chemicals and pass-through water treatment equipment, there is no effective test method and means in China at present.

Method used

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  • Method for testing scale and corrosion inhibition performance of reagent and apparatus for boiler water treatment
  • Method for testing scale and corrosion inhibition performance of reagent and apparatus for boiler water treatment
  • Method for testing scale and corrosion inhibition performance of reagent and apparatus for boiler water treatment

Examples

Experimental program
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Effect test

Embodiment 1

[0025] The organic copolymer corrosion and scale inhibitor ethylenediaminetetramethylenephosphonic acid was tested. The pressure is 2.0±0.01Mpa, the steam temperature is 213°C, the evaporation capacity is 15±0.3L / h, and the heating power is constant at 2.9±0.03Kw. Preparation of water quality 1 2 C a 2 + + 1 2 Mg 2 + = 6 mmol , HCO 3 - 180mg / l, SO 4 2- 50mg / l, Cl - 105 mg / l, pH 9.0. The experimental time Δt=144 / hour. Under the above conditions, the scale inhibition rate of the agent is 88.2%, the corrosion inhibition rate is 92.4%, and the corrosion rate of the pipeline is 0.050mm / a, which is consistent with the effect of the agent on the running boiler.

Embodiment 2

[0027] Test the performance of 3 / 8″ through-type water treatment equipment with built-in composite metal materials. The pressure is 1.0±0.01Mpa, the steam temperature is 183°C, the evaporation rate is 15±0.3L / h, and the heating power is 2.9±O. 03Kw. Natural raw water quality Ca 2+ 72.1mg / l, Mg 2+ 33.9mg / l, alkalinity 3.59mmol / l, Cl - 119.9 mg / l, pH 7.56. Experimental time Δt = 144 hours. Under the above conditions, the scale inhibition rate of the agent is 66.7%, the corrosion inhibition rate is 44.7%; the corrosion rate of the pipeline is 0.085mm / a, which is consistent with the effect of the equipment on the running boiler.

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Abstract

Disclosed is a method for testing scale and corrosion inhibition performance of reagent and apparatus for boiler water treatment, which comprises establishing a simulated boiler system, a scaling detection unit and a corrosion detection unit, utilizing a differential thermal principle and a weight-loss data detection and processing method to provide real operation behavior conditions of the simulated boiler, changing different water quality and medicinal composition, proportion, so as to conduct integrated dynamic test and evaluation for the boiler water treatment medicament and slow erosion property and scale-preventing characteristics when passing the water-treating equipment.

Description

technical field [0001] The invention belongs to the technical field of industrial water treatment, and relates to a dynamic evaluation method for testing the scale and corrosion inhibition performances of water treatment agents used in hot water or low-pressure steam boilers and physical water treatment equipment thereof. Background technique [0002] Boilers are the main source of thermal power for my country's national economy and people's lives. With the development of the national economy and the increase of urban residences, the total installed capacity of boilers has increased year by year, and has grown at a rate of 8-10% in recent years. In 2004, it reached 2 million steam tons and the total installed capacity was about 600,000, making it the country with the largest number of boilers in the world. [0003] Boiler water has certain particularities. In high temperature and high pressure environment, scaling substances in water such as Ca 2+ , Mg 2+ Precipitation o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/00
Inventor 张超郑书忠方燕萍陈军
Owner TIANJIN CHEM RES & DESIGN INST
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