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Scale inhibitor of ethylene device process water system and using method thereof

A technology of ethylene device and antiscalant, which is applied in the field of antiscalant, can solve the problems of poor adaptability and poor antiscaling effect, and achieve the effects of prolonging the operation period, good antiscaling effect and good use effect

Active Publication Date: 2010-09-22
上海良田化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the defects of poor scale inhibition effect and poor adaptability of the existing polymerization inhibitors used in the process water system of ethylene plants, and to provide a dual function of good polymerization inhibition and dispersion, especially It is suitable for the process water system of ethylene plant and can meet the requirements of long-term stable operation of the process water system.

Method used

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  • Scale inhibitor of ethylene device process water system and using method thereof
  • Scale inhibitor of ethylene device process water system and using method thereof
  • Scale inhibitor of ethylene device process water system and using method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～4

[0026] According to the formula in Table 1, the scale inhibitors for the process water system of ethylene plants in Examples 1 to 4 are prepared. The preparation method is as follows: After uniformly mixing the polymerization inhibitor and the dispersant according to the formula in Table 1, cool to room temperature, and filter. Can.

[0027] The method of using the scale inhibitor: Add the scale inhibitor of the process water system of the ethylene plant into the feed of the process water stripper of the ethylene plant, and the concentration of the scale inhibitor added to the process water system of the ethylene plant is 100ppm of the feed amount of the process water stripper .

[0028] Specific conditions for scale inhibition performance evaluation: the evaluation medium is the water sample collected from the process water stripper before and after adding the scale inhibitor, the medium inlet temperature is 70°C, the temperature of the outer wall of the heat pipe is 85°C, th...

Embodiment 5～6

[0037] According to the formula in Table 2, the scale inhibitors for the ethylene plant process water system of Examples 5-6 are prepared. Can.

[0038] The method of using the scale inhibitor: Add the scale inhibitor of the process water system of the ethylene plant into the feed of the process water stripper of the ethylene plant, and the concentration of the scale inhibitor added to the process water system of the ethylene plant is 1000ppm of the feed amount of the process water stripper .

[0039] Specific conditions for scale inhibition performance evaluation: The evaluation medium is the collected water samples from the process water stripping tower before and after adding scale inhibitors. The inlet temperature of the medium is 70°C, the temperature of the outer wall of the heat pipe is 85°C, the flow rate of the medium is 100ml / min, and the test time is 120 hours.

[0040] After testing, the scale inhibition rates of the scale inhibitors prepared from the formulas of...

Embodiment 7～8

[0042]According to the formula in Table 2, the scale inhibitors of the ethylene plant process water system of Examples 7-8 are prepared. Can.

[0043] The method of using the scale inhibitor: Add the scale inhibitor of the process water system of the ethylene plant into the feed of the process water stripper of the ethylene plant, and the concentration of the scale inhibitor added to the process water system of the ethylene plant is 5ppm of the feed amount of the process water stripper .

[0044] Specific conditions for scale inhibition performance evaluation: the evaluation medium is the water sample collected from the process water stripper before and after adding the scale inhibitor, the medium inlet temperature is 70°C, the temperature of the outer wall of the heat pipe is 85°C, the medium flow rate is 100ml / min, the test Time 120 hours.

[0045] After testing, the scale inhibition rates of the scale inhibitors prepared from the formulas of Examples 7-8 are all above 75%...

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Abstract

The invention discloses a scale inhibitor of an ethylene device process water system and a using method thereof. The scale inhibitor of the ethylene device process water system comprises the following components in percentage by mass: 10 to 90 percent of polymerization inhibitor and 10 to 90 percent of dispersant. The using method comprises the step of adding the scale inhibitor of the ethylene device process water system into a water system of an ethylene device process water stripper, wherein the adding concentration of the scale inhibitor of the ethylene device process water system is 5 to 1,000 ppm of the feeding amount of the process water stripper. The scale inhibitor has good double functions of polymerization inhibition and dissipation, is in particular suitable for the ethylene device process water system and can meet the requirement of the process water system on the stable long-period operation.

Description

technical field [0001] The invention relates to a scale inhibitor and its application method, in particular to an ethylene plant process water system scale inhibitor and its application method. Background technique [0002] In the ethylene plant, the quenched water from the quenching water tower kettle passes through the filter and coalescer to remove solid particles and free hydrocarbon droplets, and then enters the process water stripping tower to strip hydrocarbons and acid gases, and the obtained process water is heated The dilution steam is sent to the dilution steam generator. Although the quench water is treated by filters and coalescers, the oil content may still be as high as 0.5% to 2%, especially when the quench water is emulsified, the oil content is higher, and these oils contain more styrene and dienes Unsaturated compounds such as unsaturated compounds, in the high temperature environment of the process water system, are prone to polymerization scaling, causi...

Claims

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Application Information

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IPC IPC(8): C02F5/12C02F5/14C02F103/36
Inventor 黎益观程珠龙史美红黎益明刘殿凤吴斌
Owner 上海良田化工有限公司
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