Method for treating papermaking black liquid

A technology for papermaking black liquor and a treatment method, which is applied to the regeneration of alkali liquor, can solve the problems of incomplete treatment of black liquor and high processing cost, and achieves the effects of fast sedimentation and separation, large reaction contact surface, and no energy consumption.

Inactive Publication Date: 2014-03-26
乐山市洁宇纳米应用技术研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

More importantly, the treated wastewater (sodium chloride saturated liquid) can be used as raw materials for the production of electrochemical industry, and the separated organic solids can be used as industrial fuels. However, not only the treatment cost is high, but also the treatment of black liquor not completely

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A treatment method for papermaking black liquor, in which 2 square meters of nano-titanium dioxide immobilized catalyst sheets are placed in each cubic meter of papermaking black liquor to be treated, then 100 liters of hydrated calcium silicate emulsion is added per cubic meter, fully stirred, and finally settled separate.

[0022] The hydrated calcium silicate emulsion is prepared by catalytically treating the mixed liquid of silicic acid and hydrochloric acid generated by hydrolyzing silicon tetrachloride with a nano-titanium dioxide immobilized catalyst sheet, and then adding calcium hydroxide for neutralization.

[0023] The photocatalytic treatment of the nano-titanium dioxide film surface refers to putting the nano-titanium dioxide immobilized catalyst sheet in water, and chemically reacting the water and the nano-titanium dioxide immobilized catalyst sheet under natural light or ultraviolet lamp irradiation.

[0024] The time for the full stirring is 10 minutes....

Embodiment 2

[0028] A treatment method for papermaking black liquor, in which 3 square meters of nano-titanium dioxide immobilized catalyst sheets are placed in each cubic meter of papermaking black liquor to be treated, then 150 liters of hydrated calcium silicate emulsion is added per cubic meter, fully stirred, and finally settled separate.

[0029] The hydrated calcium silicate emulsion is prepared by catalytically treating the mixed liquid of silicic acid and hydrochloric acid generated by hydrolyzing silicon tetrachloride with a nano-titanium dioxide immobilized catalyst sheet, and then adding calcium hydroxide for neutralization.

[0030] The photocatalytic treatment of the nano-titanium dioxide film surface refers to putting the nano-titanium dioxide immobilized catalyst sheet in water, and chemically reacting the water and the nano-titanium dioxide immobilized catalyst sheet under natural light or ultraviolet lamp irradiation.

[0031] The time for the full stirring is 20 minutes....

Embodiment 3

[0034] The hydrated calcium silicate emulsion is prepared by catalytically treating the mixed liquid of silicic acid and hydrochloric acid generated by hydrolyzing silicon tetrachloride with a nano-titanium dioxide immobilized catalyst sheet, and then adding calcium hydroxide for neutralization.

[0035] The photocatalytic treatment of the nano-titanium dioxide film surface refers to putting the nano-titanium dioxide immobilized catalyst sheet in water, and chemically reacting the water and the nano-titanium dioxide immobilized catalyst sheet under natural light or ultraviolet lamp irradiation.

[0036] A treatment method for papermaking black liquor, in which 4 square meters of nano-titanium dioxide immobilized catalyst sheets are placed in each cubic meter of papermaking black liquor to be treated, then 200 liters of hydrated calcium silicate emulsion is added per cubic meter, fully stirred, and finally settled separate.

[0037] The time for the full stirring is 30 minutes....

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PUM

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Abstract

The invention discloses a method for treating papermaking black liquid, which is characterized in that: the method comprises: placing 2-4m2 of nanometer titanium dioxide-supported catalytic sheet into per cubic meter of the papermaking black liquid to be treated, then adding 100-200L / m3 of calcium silicate hydrate emulsion, fully stirring, and finally carrying out settlement and separation. The method treats papermaking black liquid by nanometer titanium dioxide-supported catalytic sheet and calcium silicate hydrate emulsion, and not only has advantages of simple process and low treatment cost, but also can effectively remove papermaking black liquid.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a treatment method for papermaking black liquor. Background technique [0002] Paper mills often produce a lot of wastewater, and the wastewater often contains organic matter of different colors. The organic matter is mixed together, and when the wastewater is seriously polluted, it is often black. And the processing of this papermaking black liquor is a problem that major paper mills urgently need to deal with for a long time. [0003] The publication number is 1156126, and the publication date is that the Chinese patent literature on August 06, 1997 discloses a papermaking black liquor treatment method characterized in that: a, the papermaking black liquor is acidified to a pH value of 2 ± 0.5 with phosphoric acid or phosphate, and then Add lignin, hemicellulose and other organic matter in polyacrylamide flocculation black liquor, and filter and separate; b. Add exce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C11/04
Inventor 柯玉章谢军柯杨
Owner 乐山市洁宇纳米应用技术研究所
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