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Modification method of sludge ceramsite for enhancing formaldehyde adsorption performance

A technology of sludge ceramsite and formaldehyde adsorption, applied in chemical instruments and methods, ceramic products, ceramic material production and other directions, can solve the problems of complex process, danger and high concentration of lye, achieve simple and convenient operation and good removal of indoor formaldehyde Effect of improving gas capacity and adsorption capacity

Inactive Publication Date: 2019-08-23
SOUTHWEST UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method can increase the adsorption capacity of sludge ceramsite, the process is complicated, and the concentration of lye required in the water-alkali-thermal reaction is relatively high, and at the same time, it also requires high temperature, which has certain dangers and is not suitable for industrial production.

Method used

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  • Modification method of sludge ceramsite for enhancing formaldehyde adsorption performance
  • Modification method of sludge ceramsite for enhancing formaldehyde adsorption performance
  • Modification method of sludge ceramsite for enhancing formaldehyde adsorption performance

Examples

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Effect test

Embodiment 1

[0030] A method for modifying sludge ceramsite that enhances the performance of adsorbing formaldehyde, comprising the following steps: using refractory activated sludge and clay from sewage treatment plants as raw materials, mixing them in a ratio of 1:1, and heating them at a high temperature of 1250°C Calcining to make sludge ceramsite, and then pulverizing the fired sludge ceramsite through a 2mm sieve to prepare dry sludge ceramsite; adding sludge ceramsite to potassium permanganate solution, wherein, the The mass volume ratio of dry sludge ceramsite to potassium permanganate solution is 3:20, and the concentration of potassium permanganate solution is 20g L -1 . Immerse in an oven at 45°C for 18 hours, then let it stand for 30 minutes and filter, then put the filter material in an oven, dry it at 105°C, transfer it to a muffle furnace, and roast it at 450°C for 2 hours to obtain a manganese-loaded modified sex ceramsite.

Embodiment 2

[0032] A method for modifying sludge ceramsite that enhances the performance of adsorbing formaldehyde, comprising the following steps: mixing activated sludge that is difficult to treat in a sewage treatment plant with clay, wherein the mass ratio of activated sludge to clay is 1:2, and the Calcined at 1200°C to make sludge ceramsite, and then crush the fired sludge ceramsite through a 3mm sieve to prepare dry sludge ceramsite; add sludge ceramsite to potassium permanganate solution , wherein, the mass volume ratio of described dry sludge ceramsite and potassium permanganate solution is 1:10, and the concentration of potassium permanganate solution is 10g L -1 . Immerse in an oven at 40°C for 8 hours, then let it stand for 45 minutes and filter, then put the filter material in an oven, dry it at 100°C, transfer it to a muffle furnace, and roast it at 440°C for 2.5 hours to obtain loaded manganese Modified ceramsite.

Embodiment 3

[0034] A method for modifying sludge ceramsite that enhances the performance of adsorbing formaldehyde, comprising the following steps: mixing activated sludge that is difficult to treat in a sewage treatment plant with clay, wherein the mass ratio of activated sludge to clay is 3:2. Calcined at 1300°C to make sludge ceramsite, and then crush the fired sludge ceramsite through a 1mm sieve to prepare dry sludge ceramsite; add sludge ceramsite to potassium permanganate solution , wherein, the mass volume ratio of described dry sludge ceramsite and potassium permanganate solution is 2.2:20, and the concentration of potassium permanganate solution is 5g L -1 . Immerse in an oven at 50°C for 12 hours, then let it stand for 15 minutes and filter, then put the filter material in an oven, dry it at 110°C, transfer it to a muffle furnace, and roast it at 460°C for 1.5h to obtain loaded manganese Modified ceramsite.

[0035] The technical effect of the present invention is illustrated...

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Abstract

The invention discloses a modification method of sludge ceramsite for enhancing formaldehyde adsorption performance. The method comprises the following steps: mixing activated sludge difficult to treat in a sewage treatment plant with clay, conducting calcining at high temperature to prepare sludge ceramsite, and crushing and sieving calcined sludge ceramsite to prepare dry sludge ceramsite; adding the dry sludge ceramsite into a potassium permanganate solution, dipping the dry sludge ceramsite in a drying oven, conducting standing and filtering, then putting filtered material into the dryingoven for drying, and then transferring the material to a muffle furnace for roasting to obtain manganese-loaded modified ceramsite. The modified sludge ceramsite loaded with heavy metal manganese improves the adsorption capacity of formaldehyde and has good capacity of removing indoor formaldehyde gas.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a method for modifying sludge ceramsite which enhances the performance of absorbing formaldehyde. Background technique [0002] Sludge ceramsite was first proposed by Nakouzi in 1998. Swelling sludge ceramsite was successfully fired after sludge was mixed with appropriate auxiliary materials. The particle size of sludge ceramsite is generally 5-20mm, and the bulk density is less than 1100kg m -3 , the exterior has a hard shell, the surface has a glaze layer, and the interior has a closed honeycomb microporous structure, and has a certain mechanical strength. [0003] At present, due to the shortage of sand and gravel, the building materials industry at home and abroad are actively developing lightweight ceramsite that can replace sand and gravel. In western countries, the production and use of ceramsite has a history of more than half a century, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B33/132C04B41/88C04B38/06B01J20/10B01J20/32
CPCC04B33/1321C04B41/88C04B41/009C04B41/5138C04B38/0665C04B38/0006B01J20/10B01J20/28045B01J20/28021B01J20/28059B01J20/3236C04B2235/95C04B2235/77C04B2235/96B01J2220/42B01J2220/4887B01J2220/4806C04B41/4539C04B38/0067C04B38/0074Y02P40/60
Inventor 郝庆菊江长胜彭小乐胡犇江卓芸
Owner SOUTHWEST UNIVERSITY
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