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Scale and corrosion inhibiting agent for circular cooling water of oxygen preparation plant as well as method and application thereof

A technology of circulating cooling water, scale and corrosion inhibitor, applied in chemical instruments and methods, descaling and water softening, water/sludge/sewage treatment, etc. The effect of obvious technical advantages and excellent corrosion inhibition performance

Inactive Publication Date: 2010-01-13
北京拓凯化工技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to improve the adsorption capacity of the molecular sieve, the air cooling water must be below 10 degrees, which creates a new problem, that is, the chilled water produces low-temperature scale at the nozzle of the air cooling tower, the filler and the filter.

Method used

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  • Scale and corrosion inhibiting agent for circular cooling water of oxygen preparation plant as well as method and application thereof
  • Scale and corrosion inhibiting agent for circular cooling water of oxygen preparation plant as well as method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] A scale and corrosion inhibitor (TW-301) for circulating cooling water in an oxygen plant, containing the following components: organic phosphonate, polycarboxylic acid multi-polymer, copper corrosion inhibitor, polyaspartic acid , zinc salt and water, wherein water is the solvent.

[0059] 1.1 Preparation of materials: Strictly follow the formula ratio, weigh the quantitative organic phosphonate, polycarboxylic acid multi-polymer, copper corrosion inhibitor, zinc salt and water in sequence with a metering pump, which is the preparation ①. Preparation ② is polyaspartic acid, prepared separately.

[0060] 1.2 Production: Turn on the vacuum pump, pump organic phosphonate, polycarboxylic acid multi-polymer copolymer and water into the reaction kettle, start stirring (80 rpm), and add zinc salt and copper corrosion inhibitor under stirring It is completely dissolved, continue to stir for about 20 minutes, mix well and pack separately to obtain the preparation of the presen...

Embodiment 2

[0062] The scale and corrosion inhibitor used in the circulating cooling water of an oxygen plant according to the invention is tested for the corrosion inhibition performance of the circulating cooling water of an oxygen plant in Shijiazhuang area.

[0063] 2.1 Purpose of the test.

[0064] The method of rotating coupon corrosion test is to evaluate the corrosion inhibition performance of water treatment agent by calculating the corrosion rate and corrosion inhibition rate by using the loss mass of the test piece under the given conditions in the laboratory. The corrosion characteristics of the circulating cooling water system of the oxygen plant are investigated by using the rotating coupon corrosion measurement method, and the indicators such as the appearance color change of carbon steel, stainless steel and copper, and the corrosion rate measured by the weight loss method are comprehensively judged by the corrosion rate of the object of the present invention. corrosion pe...

Embodiment 3

[0089] 3.1 Purpose of the test.

[0090] The scale inhibition effect of the product of the present invention on the supplementary water of the circulating cooling water of the oxygen plant at different dosing concentrations was measured through the static scale inhibition test, and the formulation and dosing amount of the test were preliminarily determined.

[0091] 3.2 Test method.

[0092] The test method is carried out according to the GB / T16632-1996 standard "Determination of Scale Inhibition Performance of Water Treatment Agents - Calcium Carbonate Deposition Method".

[0093] 3.3 Test procedure.

[0094] 1. Take 2000ml of raw water collected on site and add it to the beaker, accurately add the antiscalant stock solution required for the experiment, and stir;

[0095] 2. Place the beaker in a constant temperature water bath at 60±1°C for natural evaporation and concentration;

[0096] 3. When the test solution is concentrated to 2.0 times, take out the beaker, transfer...

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Abstract

The invention relates to a scale and corrosion inhibiting agent for the circular cooling water of an oxygen preparation plant as well as a method and an application thereof, which are characterized in that the scale and corrosion inhibiting agent comprises the following components: organic phosphonate, polycarboxylic acid multicomponent copolymer, copper corrosion inhibiting agent, zinc salt, polyaspartic acid and water, wherein the water is solvent. The scale and corrosion inhibiting agent can effectively prevent the formation of calcium carbonate, disperse calcium carbonate microcrystals, change the crystallization state of the calcium carbonate and have favorable performance for preventing the formation of calcium carbonate scale in the circular cooling water. The invention has the effect of preventing calcium carbonate incrustation under the complicated condition that the circular cooling water of the oxygen preparation plant is not only used by a high-temperature heat exchanger, but also used by low-temperature freezing water equipment and low-temperature equipment. Only 10-50 mg / L of scale and corrosion inhibiting agent can achieve the requirement of scale and corrosion inhibition, and the invention greatly saves the industrial water consumption amount and the economic cost and has favorable economic and social benefits.

Description

technical field [0001] The invention relates to the technical field of industrial water treatment, in particular to a scale and corrosion inhibition technology applied to the circulating cooling water system of an oxygen plant to prevent scaling and corrosion of pipelines and equipment, in particular to an oxygen plant circulation Scale and corrosion inhibitor for cooling water, method and application. The scale and corrosion inhibitor of the invention is an energy-saving, low-phosphorus and environment-friendly water treatment agent. Background technique [0002] Today, the world is facing crises such as population growth, deterioration of the ecological environment, and shortage of water resources. The scarcity and pollution of water resources pose a threat to social stability and economic development, and have become one of the most prominent problems facing the stability and development of most countries in the world. Saving It is imperative to improve the utilization r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/14
Inventor 刘雪冬宋焕明史玉崔瑞明杜雪梅张中和
Owner 北京拓凯化工技术有限公司
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