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Medium-density fiberboard production waste drainage closed cycle loop back technique

A waste water production and recycling technology, applied in fiber raw material treatment, application, household components, etc., can solve the problems of high sewage treatment costs, large investment, and increased production costs of enterprises, achieving simple structure, low investment, and easy implementation Effect

Inactive Publication Date: 2008-10-15
杨明杰 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Adopting such a technology can certainly improve the recycling rate of waste water from MDF production, but building such a sewage treatment system requires a lot of investment, and the cost of sewage treatment is very high, which greatly increases the production cost of the enterprise

Method used

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  • Medium-density fiberboard production waste drainage closed cycle loop back technique
  • Medium-density fiberboard production waste drainage closed cycle loop back technique
  • Medium-density fiberboard production waste drainage closed cycle loop back technique

Examples

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Embodiment Construction

[0016] An embodiment of the present invention, such as image 3 , Figure 4 As shown, a fully closed cycle recycling technology for medium density fiberboard production wastewater, in which the production process of density fiberboard is: raw material → slicing → screening → washing → hot grinding → sizing → fiber drying → paving → pre-pressing → hot pressing →cooling→edge trimming→sanding→finished product; among them: the washing section includes the washing process and the dehydration screw process; the heat grinding process includes pre-cooking, cork screwing, cooking, and refining processes; After the waste water is collected, it will be deslagged by the belt-type slag remover, and the solid waste will be discharged into the slag yard. The waste water after deslagging will flow into the sedimentation tank for sedimentation and then be introduced into the secondary sedimentation tank for further precipitation; the water and waste residue in the lower layer of the sedimentat...

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Abstract

The invention discloses a fully enclosed recycle and reuse technique for the waste water in producing medium density fiberboards. In the prior production process, the waste water generated between water washing and hot grinding is collected and undergoes solid-liquid separation, the solid waste is discharged into a slag yard and the waste water after separation is led into a clean water tank for reuse. The invention is characterized in that a heating used heating agent carries out heat change heating to the material in an indirect heating manner in a pre-stewing step. As the heating used heating agent is not directly contacted with the material, no redundant condensed water is generated in the pre-stewing step, the quantity of water is balanced, all the waste water is reused, no redundant water is discharged, and no system for treating biochemical sewage is needed for realizing the totally enclosed recycle and reuse of the waste water in producing the medium density fiberboards. The totally enclosed recycle and reuse technique has the advantages of saving investment, saving water, saving energy, simple structure and feasibleness.

Description

technical field [0001] The invention relates to the technical field of recycling of waste water from fiberboard production, in particular to the technical field of fully closed recycling of wastewater from medium density fiberboard production. Background technique [0002] Medium density fiberboard is a kind of board made of wood fiber or other plant fiber, applied with urea-formaldehyde resin or other synthetic resins, additives, etc., and pressed under heating and pressure conditions, usually called MDF, English abbreviation MDF. Its existing production process is: raw material → slicing → screening → washing → hot grinding → sizing → fiber drying → paving → pre-pressing → hot pressing → cooling → edge trimming → sanding → finished product; the washing section includes washing process and Dehydration spiral process; thermal grinding section includes pre-cooking, cork screwing, cooking, and refining processes; in the washing → thermal grinding section of the existing proce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27N3/04B27N1/00D21C7/10D21C11/00
Inventor 杨明杰
Owner 杨明杰
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