Recycling method of fine dust and free formaldehyde

A free formaldehyde, small technology, applied in the field of fine dust and free formaldehyde recycling, can solve the problems of pollution, waste of natural resources, reduce work efficiency and product quality, and achieve the effect of improving the working environment and improving work efficiency

Inactive Publication Date: 2012-06-27
广西新凯骅实业集团股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to discharge fine dust and free formaldehyde in the workshop or the atmosphere, pollute the workshop and the atmosphere, endanger the physical and mental health of workers, reduce work efficiency and product quality, and waste natural For resource defects, provide a method for the recycling of fine dust and free formaldehyde in the production process of wood-based panels. The fine dust is collected and paved on the surface of the formed slab. The free formaldehyde is dissolved, filtered, condensed, and concentrated to a concentration of 10%. The above formaldehyde solution is used in the manufacture of urea-formaldehyde resin adhesives to realize environmental friendliness and resource saving in the production process of wood-based panels

Method used

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  • Recycling method of fine dust and free formaldehyde
  • Recycling method of fine dust and free formaldehyde

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] see figure 1 , Schematic diagram of process equipment for the recycling method of fine dust and free formaldehyde.

[0021] (1) Turn on the forced axial flow fans in the air collectors 1 and 2 to suck away the fine dust, free formaldehyde and water vapor discharged during the hot pressing and cooling of the particleboard, and send them to the cyclone separator 3.

[0022] (2) The mixed air is separated into fine dust and air containing free formaldehyde gas in the cyclone separator 3, and most of the fine dust settles in the dust collector 4, and a small part of fine dust particles and air containing free formaldehyde are released from the The discharge from the top of the cyclone separator 3 enters the settling chamber 7 driven by the tail gas conveying fan 6 .

[0023] (3) The dust in the dust collector 4 is conveyed to the particle silo by the dust feeding fan 5, and then paved on the surface layer of the particleboard slab by a mechanical and air-flow paving machi...

Embodiment 2

[0030] (1) Turn on the forced axial flow fans in the air collectors 1 and 2 to suck away the fine dust, free formaldehyde and water vapor discharged during the process of hot pressing and cooling the fiberboard, and send them to the cyclone separator 3.

[0031] (2) The mixed air is separated into fine dust and air containing free formaldehyde gas in the cyclone separator 3, and most of the fine dust settles in the dust collector 4, and a small part of fine dust particles and air containing free formaldehyde are released from the The discharge from the top of the cyclone separator 3 enters the settling chamber 7 driven by the tail gas conveying fan 6 .

[0032] (3) The dust in the dust collector 4 is conveyed to the fiber silo by the dust feeding fan 5, and then paved on the surface layer of the fiberboard slab by a vacuum and air flow paving machine.

[0033] (4) The air entering the settling chamber 7 fully contacts the atomized water sprayed from the atomizing spray device ...

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Abstract

The invention relates to a recycling method of fine dust and free formaldehyde generated in an artificial board production process. In the method, the discharged fine dust and free formaldehyde are collected in a thermal pressing and board cooling working procedure of the production process of fiberboards and particle boards, and then treated to be used for manufacturing of the fiberboards and the particle boards, wherein the fine dust is collected and conveyed to a sizing bin to be paved on the surface layers of the slabs of the particle boards or fiberboards, and free formaldehyde is dissolved, filtered, condensed and concentrated to obtain formaldehyde solution with concentration more than 10% to be used for manufacturing an urea-formaldehyde resin adhesive. By implementing the method, the reutilization rates of the fine dust and free formaldehyde achieve more than 90%, the shop working environment is significantly improved, the working efficiency is improved, and the environmental friendliness and resource saving of the production process of the fiberboards and particle boards are realized.

Description

technical field [0001] The invention belongs to the technical field of wood-based panel manufacturing in the wood industry, in particular to a recycling method for fine dust and free formaldehyde. Background technique [0002] Traditional wood-based panels include plywood, particleboard and fiberboard three types of board. At present, my country is the largest producer of wood-based panels in the world, and its output and value of wood-based panels rank first in the world. Due to the advantages of high material utilization rate, small product anisotropy, and good dimensional stability, wood-based panels have replaced solid wood to a large extent and become the most important raw material for furniture manufacturing and decoration industries. In the production process of fiberboard and particleboard, due to the small material unit (wood fiber and shavings) and the use of a large amount of formaldehyde resin glue, the workshop is prone to dust and free formaldehyde pollution,...

Claims

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Application Information

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IPC IPC(8): B27N3/18
Inventor 洪东方李贤军李英伟陈正山
Owner 广西新凯骅实业集团股份有限公司
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