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Polar fiber filter

A polar fiber and filter technology, which is used in the field of high-temperature wastewater desiliconization and the preparation of anion exchange resins, can solve the problems of difficult removal of colloidal silicon in water and low temperature resistance of anion exchange resins.

Active Publication Date: 2013-10-16
北京中能环科技术发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to overcome the deficiencies of colloidal silicon in water that is difficult to remove and the low temperature resistance of anion exchange resins, and propose a complete set of high temperature wastewater including polar fiber filters, high temperature resistant anion exchange resins and a method for finely removing all silicon from high temperature wastewater Desiliconization technology

Method used

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  • Polar fiber filter

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Embodiment 1

[0031] Example 1, polar fiber filter.

[0032] Referring to the attached figure, the polar fiber filter is made of CO 2 The aeration device 1, the pressure-resistant sealed container 2, the progressive polar fiber filter layer 3, and the decompression suction filtration device are jointly composed. Among them, the progressive polar fiber filter layer is made of polar fiber. The polar fibers here are made from viscose-based activated carbon fibers under the activation of polar oxidants (such as hypochlorite, dichromate, nitric acid, hydrogen peroxide, ozone).

[0033] The preparation method of preferred polar fiber among the present invention is:

[0034] (1) At room temperature, cut the viscose-based activated carbon fiber felt into a suitable size, soak it in a hydrogen peroxide solution with a mass fraction of 30% for 2 hours, then take it out and dry it;

[0035] (2) Place the dried activated carbon fiber mat in a high-temperature activation furnace, slowly raise the tem...

Embodiment 2

[0037] Embodiment 2, a kind of preparation method of high temperature resistant anion exchange resin is:

[0038] (1) Take 1L of strong base anion exchange resin (model 201×7MB, GB13660-92 DL519-93 SH2605.06-97) in a high-pressure reactor, add 2L of saturated NaCl solution into the high-pressure reactor, soak for 18 Pour out the solution after 1 hour, then wash with deionized water until the effluent is clear;

[0039] (2) Add 2L of tetrahydrofuran into the high pressure reactor, soak for 2 hours, and extract tetrahydrofuran;

[0040](3) Add 2L of triethylamine to the high-pressure reactor, stir for 2 minutes, seal and heat to 100°C, and react for 10 hours;

[0041] (4) After the reaction is completed, filter the resin, and wash it 3 times with ethanol at 40°C and deionized water at 40°C;

[0042] (5) Add 2L of 5% HCl solution by mass fraction to the high-pressure reactor, soak for 8 hours, drain the acid solution, and rinse with deionized water repeatedly until neutral;

...

Embodiment 3

[0044] Embodiment 3, the preparation method of another kind of high temperature resistant anion exchange resin is:

[0045] (1) Take 1L of strong base anion exchange resin (model 201×7MB, GB13660-92 DL519-93 SH2605.06-97) in a high-pressure reactor, add 3L of saturated NaCl solution to the high-pressure reactor, soak for 15 Pour out the solution after 1 hour, then wash with deionized water until the effluent is clear;

[0046] (2) Add 2.5L of dichloromethane into the high-pressure reactor, soak for 2.5 hours, and extract the dichloromethane;

[0047] (3) Add 3L of triethylamine into the high-pressure reactor, stir for 2.5 minutes, seal and heat to 95°C, and react for 12 hours;

[0048] (4) After the reaction is completed, filter the resin, and wash it 3 times with ethanol at 45°C and deionized water at 50°C;

[0049] (5) Add 4L of HCl solution with a mass fraction of 10% to the high-pressure reactor, soak for 6 hours, and after emptying the acid solution, rinse it repeatedly...

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Abstract

The invention relates to a polar fiber filter, a high temperature resistant anion exchange resin and a method for fine removal of total silicon from high temperature wastewater. The polar fiber filter comprises a CO2 aeration device, a pressure tight container, a progressive polar fiber filter layer, and a decompressing filtration device, wherein, the progressive polar fiber filter layer is prepared by compacting polar fibers. The high temperature resistant anion exchange resin is prepared by placing a strong base type anion exchange resin in a high pressure reactor and adding different solutions under specific conditions. On the basis, high temperature wastewater is introduced into the polar fiber filter, and sufficient CO2 is introduced into the wastewater at an inlet so as to reduce the pressure in the container to 0-0.5Mpa and remove nonactive silicon in the wastewater. Then the high temperature waste water is introduced into an ion exchanger containing the high temperature resistant anion exchange resin so as to remove active silicon in the wastewater. With high silicon removal precision, the method of the invention provides a foundation for industrial application of high temperature wastewater.

Description

technical field [0001] The invention relates to the field of water purification devices, as well as the fields of preparation methods of anion exchange resins and high-temperature wastewater desiliconization methods. Background technique [0002] With the improvement of awareness of environmental protection and energy saving, people are more and more inclined to directly treat industrial high-temperature wastewater such as high-temperature condensate water in a high-temperature environment. The hot water after high-purity treatment can be directly used as boiler makeup water or heating water. This can not only reduce the investment in cooling and heat exchange equipment, but also save a large amount of standard coal by utilizing the heat energy in water. However, high-temperature wastewater usually contains silicon, and after a period of deposition, silicon scale will form on the inner wall of the boiler, valves, and elbows, which seriously affects the life and safety of equ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D24/10B01D39/14B01J41/12C02F9/04C02F1/60B01J41/13
Inventor 杨哲张培
Owner 北京中能环科技术发展有限公司