Composite resistivity silicon scale inhibitor for preventing silicon dioxide dirt deposition in industrial water conditioning system

A technology for silica scale, industrial water treatment, applied in water/sludge/sewage treatment, descaling and water softening, chemical instruments and methods, etc. Degradation, water pollution and other problems, to achieve obvious synergistic effect of blocking silicon, less total dosage, and reduce pollution

Inactive Publication Date: 2009-09-30
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The object of the present invention is to provide a kind of compound silicon dioxide antiscaling agent that prevents the deposition of silica scale in the industrial water treatment system, to overcome the use of traditional organic phosphine antiscaling agent and anionic polymer antiscaling and dispersing agent in the existing method The problem of poor silicon resistance to silica scale
[0013] The second object of the present invention is to provide a kind of non-phosphorus, biodegradable and be used for preventing the problem of silica scale deposition in industrial water treatment, to overcome with existing traditional organic phosphine antiscaling agent and anionic polymer antiscaling dispersant The formula for inhibiting silicon scale contains high phosphorus and is non-biodegradable, which is easy to cause water pollution.

Method used

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  • Composite resistivity silicon scale inhibitor for preventing silicon dioxide dirt deposition in industrial water conditioning system
  • Composite resistivity silicon scale inhibitor for preventing silicon dioxide dirt deposition in industrial water conditioning system
  • Composite resistivity silicon scale inhibitor for preventing silicon dioxide dirt deposition in industrial water conditioning system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Example 1 This example is the preparation of adipic acid / amino-terminated polyether / diethylenetriamine copolymer

[0045] Add 34.5g of amino-terminated polyether D230 and 87.6g of diethylenetriamine into a four-necked flask equipped with a stirring, thermometer, ventilation tube, steam condenser and steam trap, stir well and then slowly add 70g of Deionized water, after stirring for 10 minutes, add 146g of adipic acid in batches while stirring, and control the temperature <70°C. After adding adipic acid, feed nitrogen, place in an oil bath and start heating to 180°C, when the temperature rises to 120°C~125°C, condensed water begins to appear, which is collected through a steam condenser and a steam trap The condensed water was collected, and the temperature was continued to rise until the temperature of the reaction liquid reached 180° C., and the reaction was carried out at 180° C. for 4 hours to obtain a yellow viscous substance. Then the reaction solution was cooled...

Embodiment 2

[0046] Embodiment 2 This embodiment is the static silicon scale inhibition experiment of composite scale inhibitor

[0047] Preparation of composite silicon and scale inhibitor: adipic acid / amino-terminated polyether / diethylenetriamine copolymer (AA / ATPEs / EDETA) with a solid content of 40% and polyaspartic acid with a solid content of 40% Sodium (PASP) is uniformly mixed according to the effective mass ratio of adipic acid / amino-terminated polyether / diethylenetriamine copolymer and sodium polyaspartate at a ratio of 10:1 to make a composite silicon barrier with a solid content of 40%. Inhibitor.

[0048] The prepared compound antiscalant was tested for the performance test of static silica scale inhibition, and the experimental results are shown in Table 2.

Embodiment 3

[0049] Example 3 This example is the static silicon scale inhibition experiment of composite scale inhibitor

[0050] Preparation of composite silicon and scale inhibitor: adipic acid / amino-terminated polyether / diethylenetriamine copolymer (AA / ATPEs / EDETA) with a solid content of 40% and polyaspartic acid with a solid content of 40% Sodium (PASP) is uniformly mixed according to the effective mass ratio of adipic acid / amino-terminated polyether / diethylenetriamine copolymer and sodium polyaspartate at an effective mass ratio of 8:1 to make a composite silicon barrier with a solid content of 40%. Inhibitor.

[0051] The prepared compound antiscalant was tested for the performance test of static silica scale inhibition, and the experimental results are shown in Table 2.

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PUM

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Abstract

The invention belongs to the technical field of industrial water treatment, and specifically relates to a composite silicon dioxide scale inhibitor for preventing the deposition of silica scale in industrial water treatment systems, that is, adding adipic acid / amino-terminated polysaccharides to industrial water treatment systems Composite silicon and scale inhibitor of ether / diethylenetriamine copolymer and sodium polyaspartate, the weight ratio of adipic acid / amino-terminated polyether / diethylenetriamine copolymer to sodium polyaspartate is 10 : 1 to 2: 1, so that the two polymers can exert a stable and synergistic effect of preventing the deposition of silica scale in the industrial water treatment system. The adipic acid / amino-terminated polyether / diethylenetriamine copolymer used in the present invention is a nonionic polymer containing ether bonds, secondary amine bonds, and peptide bond structures, and has the function of obviously preventing the deposition of silica scale in water . The sodium polyaspartate used in the composite silicon and scale inhibitor of the present invention can significantly improve the effect of adipic acid / amino-terminated polyether / diethylenetriamine copolymer for preventing the deposition of silicon scale. The invention provides a phosphorus-free, biodegradable, environment-friendly method for preventing the deposition of silicon scale in an industrial water treatment system.

Description

technical field [0001] The invention belongs to the technical field of industrial water treatment, and in particular relates to a compound silicon dioxide scale inhibitor for preventing the deposition of silicon dioxide scale in an industrial water treatment system. Background technique [0002] In the field of industrial water treatment, raw water usually contains a large amount of alkaline earth metal cations such as Ca 2+ , Mg 2+ 、Ba 2+ etc. and anionic groups such as CO 3 3- , SO 4 2- and PO 4 3- etc., and soluble silica. Under certain conditions (such as evaporation, concentration, etc.), these cations and anions are easily combined to form CaCO 3 , CaSO 4 , BaSO 4 , Ca 3 (PO 4 ) and other inorganic salt scales, silica will aggregate to form insoluble colloidal silica scales, which are deposited on the surface of water treatment pipes and equipment to cause harm. However, silica scale is different from inorganic salt scale. Once formed, silica scale is dif...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L77/08C08L77/02C02F5/12
Inventor 张冰如李风亭
Owner TONGJI UNIV
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