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Porous thermal insulation filling material made of paper mill sludge and preparation method thereof

A technology of filling material and papermaking sludge, which is applied in the field of preparation of the porous thermal insulation filling material, can solve the problems of complex composition of papermaking sludge, difficult treatment, secondary pollution, etc., achieve stable molding, low price, and reduce secretion water effect

Inactive Publication Date: 2017-01-04
山东福航新能源环保股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Papermaking sludge is the terminal product of wastewater treatment in the papermaking process. For every ton of recycled paper produced, 700 kg of sludge with a water content of 65% is produced, which is 5 to 10 times that of a municipal sewage treatment plant of the same scale. The composition is complex, the water content is high, and the treatment is difficult. If it is not properly treated, it will cause serious secondary pollution. Therefore, the harmless treatment and disposal of papermaking sludge has become an environmental problem that needs to be solved urgently.

Method used

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  • Porous thermal insulation filling material made of paper mill sludge and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0025] Such as figure 1 As shown, 30 kg of papermaking sludge with a water content of 40%-60%, 10 kg of sulphoaluminate cement, 30 kg of fly ash with a fineness of 0.01-0.045 mm, 1 kg of gypsum, and 1 kg of water were injected into the Stir the mixer at a speed of 800 to 1000r / min for 15 to 35 minutes until the material is evenly mixed; add 0.01 kg of rosin foaming agent to the mixer and mix evenly to obtain a mixed mortar; put the mixed mortar into the storage room, The semi-finished product of porous thermal insulation filling material is made by resting and foaming at 32 ℃ for 30 minutes, and the internal pores are uniform and dense; Granules; the finished porous heat insulation filling material is naturally cured for 1 hour to obtain the finished product.

Embodiment 2

[0027] Such as figure 1 As shown, 35 kg of papermaking sludge with a water content of 40% to 60%, 14 kg of gypsum cement, 35 kg of fly ash with a fineness of 0.01 to 0.045 mm, 3 kg of gypsum, and 10 kg of water were injected into the mixer. Stir at a speed of 800~1000r / min for 15~35min until the materials are evenly mixed; add 0.06 kg of rosin foaming agent to the mixer, and mix evenly to obtain a mixed mortar; put the mixed mortar into the storage room and let it rest at 20~32 °C Foaming for 70 min to make a semi-finished porous heat-insulating filling material with uniform and dense internal pores; inject the semi-finished porous heat-insulating filling material made of foamed papermaking sludge into a rotary molding machine with a feeder for molding and granulation; The formed porous thermal insulation filling material is naturally cured for 10 hours to obtain the finished product.

Embodiment 3

[0029] Such as figure 1 As shown, 40 kg of papermaking sludge with a water content of 40%-60%, 18 kg of pozzolanic composite cementitious material, 40 kg of fly ash with a fineness of 0.01-0.045 mm, 6 kg of gypsum, and 21 kg of water, Pour into the mixer, and stir at a speed of 800-1000r / min for 15-35min until the material is evenly mixed; add 0.12 kg of rosin foaming agent to the mixer, and mix evenly to obtain a mixed mortar; put the mixed mortar into the storage room, and mix it at 20 ~32 ℃ resting and foaming for 120 min to make a semi-finished porous heat insulating filling material with uniform and dense internal pores; inject the semi-finished porous heat insulating filling material made of foamed papermaking sludge into the rotary molding machine with a conveyor for molding Granulation; the formed porous heat insulation filling material is naturally cured for 24 hours to obtain the finished product.

[0030] Due to the low density of the porous heat-insulating filling...

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Abstract

The invention discloses a porous thermal insulation filling material made of paper mill sludge and a preparation method thereof. Raw material paper mill sludge, cement, fly ash and gypsum are injected into a stirrer in proportion to be stirred evenly; a foaming agent is added into the stirrer, uniform mixing is performed to obtain mixed mortar; and the mixed mortar is contained in a storage chamber and undergoes rest curing foaming to obtain the semi-finished porous thermal insulation filling material; the semi-finished product is injected into a forming machine to be formed and granulated; the formed porous thermal insulation filling material undergoes natural curing, and a finished product is obtained. A mode of manufacturing the porous thermal insulation filling material made of the paper mill sludge is provided, the problem that existing paper mill sludge is stacked messily and pollutes the environment can be solved, and harmlessness, resource reutilization, economy and efficiency of the paper mill sludge can be guaranteed.

Description

technical field [0001] The invention relates to a porous heat-insulating filling material made of papermaking sludge, and also relates to a preparation method of the porous heat-insulating filling material. Background technique [0002] Papermaking sludge is the terminal product of wastewater treatment in the papermaking process. For every ton of recycled paper produced, 700 kg of sludge with a water content of 65% is produced, which is 5 to 10 times that of a municipal sewage treatment plant of the same size. The composition is complex, the water content is high, and the treatment is difficult. If it is not properly treated, it will cause serious secondary pollution. Therefore, the harmless treatment and disposal of papermaking sludge has become an environmental problem that needs to be solved urgently. [0003] Papermaking sludge is rich in biomass, with an organic matter content of 40% to 50%. It mainly contains high molecular weight organic matter such as cellulose, hemi...

Claims

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Application Information

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IPC IPC(8): C04B28/02C04B28/06C04B28/14C04B38/08C04B38/02
CPCC04B28/02C04B28/06C04B28/14C04B38/02C04B38/08C04B2111/40C04B2111/52
Inventor 王志恒闫广播孙红波张洪彬王震
Owner 山东福航新能源环保股份有限公司
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