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Branching treatment method of pulp paper sludge and application of branching treatment products thereof

A treatment method and branched technology, applied in sludge treatment, water/sludge/sewage treatment, biological organic part treatment, etc. Eliminate the effects of valuable land occupation, increased investment costs, huge economic benefits and social and environmental benefits

Active Publication Date: 2013-08-28
ASIA SYMBOL SHANDONG PULP & PAPER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] In order to solve the problems of environmental pollution, soil or sea self-treatment capacity reduction caused by landfill sludge treatment in the existing pulp and paper industry, and the high investment cost of sludge treatment in foreign countries, the present invention has developed a The method of branch treatment of seed pulp paper sludge and the application of each branch treatment product, the application of each branch treatment product to other industries for repeated application, that is, to save land, reduce pollution, turn papermaking sludge into treasure, Turn harm into benefit, and will not increase the cost of sludge treatment methods, and finally achieve the purpose of reduction, harmlessness, stabilization and resource utilization of sludge treatment and disposal

Method used

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  • Branching treatment method of pulp paper sludge and application of branching treatment products thereof
  • Branching treatment method of pulp paper sludge and application of branching treatment products thereof
  • Branching treatment method of pulp paper sludge and application of branching treatment products thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment one: if figure 1 The flow chart of the method for branching pulp and paper sludge treatment of the present invention is shown, the method includes the following steps: (1) sediment the pulp and paper sludge for 5 to 6 hours, separate the sewage and solids in the pulp and paper sludge, and separate The solid content discharged is primary sludge; some fibrous solid waste in the pulping workshop and cardboard workshop wastewater of pulp and paper mills forms pulp and paper sludge, and the temperature when it is discharged from the workshop to the sewage plant sump is generally 60-60℃. 70°C, the temperature will be cooled to 37-40°C after the heat exchange of the plate heat exchanger, and then the pulp and paper sludge will undergo natural gravity sedimentation in the primary sedimentation tank to separate the sewage and solids, the first step of separation The solid content that comes out is the primary sludge.

[0031] (2) Pass the sewage separated in step (1...

Embodiment 2

[0050] Embodiment 2: The branch treatment method of the pulp and paper sludge of the present invention comprises the following steps: (1) Precipitating the pulp and paper sludge for 5 to 6 hours to separate the sewage and solids in the pulp and paper sludge, and the separated solids The content is primary sludge;

[0051] (2) Pass the sewage separated in step (1) into the aeration tank; dehydrate the separated primary sludge so that the mass fraction of dry solids reaches 50%, and obtain the first branch treatment product;

[0052] (3) The sewage in the aeration tank in step (2) is aerated for 8 to 12 hours to form aerated sewage, and then the aerated sewage is precipitated for 2 to 4 hours to separate the solids in the aerated sewage, and the separated The solid content is biological sludge;

[0053] (4) For the aerated sewage separated in step (3), the Fenton oxidation method was used for oxidative decolorization; the separated biological sludge was dehydrated so that the mas...

Embodiment 3

[0065] Embodiment 3: The branch treatment method of the pulp and paper sludge of the present invention comprises the following steps: (1) Precipitating the pulp and paper sludge for 5 to 6 hours to separate the sewage and solids in the pulp and paper sludge, and the separated solids The content is primary sludge;

[0066] (2) Pass the sewage separated in step (1) into the aeration tank; dehydrate the separated primary sludge so that the mass fraction of dry solids reaches 75%, and obtain the first branch treatment product;

[0067] (3) The sewage in the aeration tank in step (2) is aerated for 8 to 12 hours to form aerated sewage, and then the aerated sewage is precipitated for 2 to 4 hours to separate the solids in the aerated sewage, and the separated The solid content is biological sludge;

[0068] (4) For the aerated sewage separated in step (3), the Fenton oxidation method was used for oxidative decolorization; the separated biological sludge was dehydrated so that the m...

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Abstract

The invention discloses a branching treatment method of pulp paper sludge and an application of branching treatment products thereof. The branching treatment method comprises the following steps of: (1) carrying out preliminary precipitation on the pulp paper sludge, and dehydrating a solid content to obtain a first branching treatment product serving as a cardboard paper raw material; (2) feeding wastewater separated out in the step (1) into a secondary-level biological aeration tank; (3) forming aeration wastewater, then precipitating for 2-4 hours, separating out the solid content, and obtaining a second branching treatment product serving as a biological organic fertilizer; (4) oxidizing the aeration wastewater without the solid content in an advanced oxidation fluidization bed to remove COD (Chemical Oxygen Demand), separating out black ferric oxide solid content in the oxidation process, and carrying out dehydration treatment; (5) feeding the wastewater in the step (4) into an air floatation decoloring system; (6) separating solid content chemical sludge from the wastewater in the air floatation decoloring system; and (7) dehydrating the chemical sludge, and obtaining a third branching treatment product serving as a power boiler raw material and a cement auxiliary material. The branching treatment method has the advantages that great environmental risks and potential safety hazards caused by sludge backfilling are eliminated, the products obtained by the branching treatment method can be recycled, and the purpose of turning waste into wealth is fully realized.

Description

technical field [0001] The invention relates to the field of environmental protection, in particular to a branch treatment method for pulp and paper sludge and an application of the branch treatment product. Background technique [0002] With the economic development and the strengthening of environmental protection awareness, the sewage treatment business continues to develop, the total water treatment volume and treatment degree of sewage plants in various places continue to expand and improve, and the amount of sludge produced is also increasing. The investment and operating costs of sludge treatment and disposal are relatively high. If not disposed of properly, it will cause "secondary pollution". This has become a difficult problem in the field of environmental protection and has attracted much attention. [0003] The main sludge disposal method in my country is landfill. However, there are many disadvantages of landfilling. It requires a large area of ​​land and high ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/00C10L5/46C04B7/24C05F7/00C05F17/00
CPCY02A40/20Y02E50/10Y02E50/30Y02P40/10Y02W30/40
Inventor 马克顺张守国庄以波宋涛王秀玲杨恒
Owner ASIA SYMBOL SHANDONG PULP & PAPER
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