High-fire-resistance composite adsorbing material and preparing method and application thereof

A composite adsorption material, high flame retardant technology, applied in chemical instruments and methods, alkali metal compounds, other chemical processes, etc. Small, good flame retardancy, fast diffusion effect

Inactive Publication Date: 2019-01-04
NANJING FORESTRY UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because of its unique honeycomb structure, honeycomb activated carbon has good aerodynamic performance, small bed pressure drop, and fast adsorption and desorption rate, but it has low mechanical strength, poor flame retardancy, easy pulverization, and difficult regeneration. Most manufacturers choose to use it. Disposal directly afterwards leads to high disposal costs, especially in the hot air regeneration process after adsorption saturation, which is prone to fire, which does not meet the current safety production requirements

Method used

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  • High-fire-resistance composite adsorbing material and preparing method and application thereof
  • High-fire-resistance composite adsorbing material and preparing method and application thereof
  • High-fire-resistance composite adsorbing material and preparing method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Take by weighing 3g beating degree is 40 ° SR wood pulp fiber, 0.87g special fiber (diameter 5 μ m, length 6mm), 1.19g polyvinyl alcohol, 10.4g powdered activated carbon, 1.22g melamine phosphate, 33.3kg water, after each component is mixed Dispersion was performed with a stirrer for 30 minutes. Put the uniformly dispersed mixed material into the water filter machine to form and dry it, and use scanning electron microscope to characterize it, as shown in figure 1 shown by figure 1 It can be seen that the wood pulp fiber has a dense continuous structure, and the special fibers are intertwined in a disorderly manner to form a skeleton, and the activated carbon is fixed in the large gaps of the skeleton. Diffusion mass transfer.

[0025] The same formula and process as above were used to prepare comparative products. In comparison 1, polyester fiber was used to replace special fiber, and in comparison 2, glass fiber was used to replace special fiber. The physical and ch...

Embodiment 2

[0031] Take by weighing 2g beating degree is 30 ° SR wood pulp fiber, 0.17g special fiber (diameter 50μm, length 10mm), 1.17g starch, 10.84g powdered activated carbon, 1.50g aluminum phosphate, 1.0g magnesium phosphate, 3.34kg water, each group Dispersion was carried out with a stirrer for 30 minutes after the partial mixing. Put the uniformly dispersed mixed material into a water filter machine to form and dry.

Embodiment 3

[0033] Take by weighing 6.67g degree of beating and be 50 ° SR wood pulp fiber, 2.50g special fiber (diameter 100 μm, length 3mm), 1.00g chitosan, 5.84g powdered active carbon, 0.67g magnesium hydroxide, 16.7kg water, each component Dispersion was carried out with a stirrer for 15 minutes after mixing. Put the uniformly dispersed mixed material into a water filter machine to form and dry.

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Abstract

The invention discloses a high-fire-resistance composite adsorbing material and a preparing method and application thereof. The composite material is prepared from powdery activated carbon, wood pulpfibers, special fibers, an insoluble flame retardant and an adhesive. According to the high-fire-resistance composite adsorbing material and the preparing method and application thereof, the special fibers and the insoluble flame retardant are compounded, the good flame retardant effect is achieved, and it is avoided that as a soluble fire retardant is used, the pore structure of the activated carbon is blocked; the composite adsorbing material simultaneously has the advantages of the special fibers and the activated carbon, also has the advantages of being good in fire resistance, hydrophobicity, heat stability and chemical stability, developed in pore structure, large in specific area, high in mechanical strength, not prone to pulverization and the like, and is particularly suitable foradsorption purification of all kinds of VOCs waste gas; a source of raw materials is wide, the technology process is simple, fiber products with different forms can be freely processed, and the composite adsorbing material has the advantages of being high in adsorption capacity, capable of achieving in-situ regeneration and recycling, high in adsorption / desorption rate, small in pressure drop andthe like in application of fixed bed adsorption and rotating wheel adsorption.

Description

technical field [0001] The invention belongs to the technical field of functional materials, and in particular relates to a highly flame-retardant composite adsorption material and its preparation method and application. Background technique [0002] VOCs (Volatile Organic Compounds) generally refer to organic compounds with a boiling point between 50-260°C under normal pressure and a saturated vapor pressure exceeding 134Pa at room temperature, and are highly volatile. The adsorption method has the advantages of high treatment efficiency, simple operation, and stable operation, and is widely used in the treatment of various VOCs gases. [0003] The most commonly used adsorbent in the adsorption method is activated carbon, especially honeycomb activated carbon, which has been widely used in the treatment of various VOCs gases in recent years, and it can achieve a treatment effect of 90% or even higher. Because of its unique honeycomb structure, honeycomb activated carbon ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/26B01J20/28B01J20/30B01D53/02
CPCB01J20/20B01D53/02B01D2257/708B01J20/12B01J20/262B01J20/28011B01J20/2804B01J20/3042
Inventor 付博刘菊张东辉周乔焦亮田彩霞易玉明张涛戴荪朱新宝左宋林乔维川张磊李兴民
Owner NANJING FORESTRY UNIV
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