A kind of online whitening technology of Fibreboard ProductionTechnical field
The embodiment of the present invention is related to a kind of online whitening technology of Fibreboard Production.
Background technique
Fiberboard is to apply glue in production process using timber, bamboo surplus material of processing or other plant stem as raw materialThe product of stick or additive is referred to as fiberboard, and it is each to be widely used in the industrial or agricultural such as decorations, Furniture manufacture, vehicle transportDepartment is the effective way of wood, bamboo resource and agricultural resource comprehensive utilization.In recent years, due to fiber board industry high speed developmentGo up energetically with paper industry production capacity, brings wood raw material supply shortage, the prices of raw materials of Fibreboard Production rise suddenly and sharply and qualityDecline.In addition, fibre will be caused containing the excessive factors such as colored group or inferior raw material in the composition of raw material that fibreboard product usesIt is deeper to tie up panel products color.
Summary of the invention
The present invention provides a kind of online whitening technologies of Fibreboard Production, improve the color of fiberboard, expand fibreTie up plate use scope and raw material sources and make low-quality raw materials obtain increment utilize.
The present invention provides a kind of online whitening technologies of Fibreboard Production, comprising: it is raw that brightening agent slot is placed in fiberboardAbove the wood raw material wood chipping equipment discharge port of producing line to the wood chip belt conveyer between defibrator preheating cooker feed inlet；It adjustsBrightening agent processed；And the brightening agent is applied to wood chip, so that the applied amount of the brightening agent is controlled the 0.5- in wood chip weight0.7%.
In the online whitening technology of above-mentioned Fibreboard Production, wherein modulating the brightening agent includes: by 70 parts by weight waterThe brightening agent slot is poured into, the sodium chlorite solution of 11-13 parts by weight, the hydrogen peroxide of 15-17 parts by weight are then sequentially addedSolution starts the blender in the brightening agent slot and pours into the sodium metasilicate of 1.5-2.5 parts by weight straight in the brightening agent slotIt is completely dissolved to sodium metasilicate.
In the online whitening technology of above-mentioned Fibreboard Production, wherein the brightening agent slot is made of stainless steel material.
In the online whitening technology of above-mentioned Fibreboard Production, wherein the mass concentration of sodium chlorite solution is 40%.
In the online whitening technology of above-mentioned Fibreboard Production, wherein the mass concentration of hydrogenperoxide steam generator is 37%.
In the online whitening technology of above-mentioned Fibreboard Production, wherein the fibreboard product of fibreboard production line can beLight fiberboard, hardboard, medium density fibre board (MDF) or high density fiberboard.
Method of the invention can brighten fiberboard online, have substantially no effect on production efficiency.Processing is not brightenedThe whiteness value of fibreboard product is generally 27.3 degree or so, and the whiteness value for brighten online treated fiberboard can reach34.8 degree or so, whiteness value improves about 7.5 degree.Online whitening technology of the invention is not making any change to production-line techniqueUnder conditions of, brightening agent applied amount can reach pre- for 0.6% or so of ligneous materials (moisture content 40%) weight such as timberThe whitening effect of phase.
Specific embodiment
The following examples can make those skilled in the art that the present invention be more fully understood, but not limit in any wayThe present invention.
Stainless steel brightening agent slot (about 1 cubic metre of volume) is placed in the wood raw material wood chipping equipment discharge port of fibreboard production lineTo the wood chip belt conveyer continuously run between defibrator preheating cooker feed inlet, agent flux is brightened by stainless steelThe flowmeter of brightening agent slot outlet is adjusted.Brightening agent slot can also be made of other suitable materials.Fibreboard product canThink light fiberboard, hardboard, medium density fibre board (MDF) or high density fiberboard.
The modulation of brightening agent: 70 parts by weight water are poured into the stainless steel brightening agent slot with blender, then sequentially add 11-Sodium chlorite solution's (mass concentration 40%) of 13 parts by weight, (mass concentration is the hydrogenperoxide steam generator of 15-17 parts by weight37%) it, starts the blender of stainless steel brightening agent slot and pours into the stabilizer sodium metasilicate of 1.5-2.5 parts by weight in brightening agent slotUntil sodium metasilicate is completely dissolved, that brightening agent is made is stand-by.
The flowmeter that the outlet of stainless steel brightening agent slot is adjusted according to defibrator wood chip Feed metering device, makes the amount of brightening agentControl the 0.5-0.7% in wood chip (moisture content 40% or so) weight.
The physical mechanics property for applying brightening agent forward and backward stage product produced to production line wood chip can be carried out detection, send outNow other than mechanical strength index slightly increases, no any other negative effect.In addition, passing through whiteness value commonly used in the artMeasuring method measures the whiteness for brighten and not brightened fiberboard.
Embodiment 1
The wood raw material that stainless steel brightening agent slot (about 1 cubic metre of volume) with blender is placed in fibreboard production line is cutAbove piece machine discharge port to the wood chip belt conveyer continuously run between defibrator preheating cooker feed inlet.
The modulation of brightening agent: 280kg water is poured into stainless steel brightening agent slot, the sodium chlorite for then sequentially adding 48kg is moltenLiquid (mass concentration 40%), the hydrogenperoxide steam generator (mass concentration 37%) of 64kg, starts stirring for stainless steel brightening agent slotIt mixes machine and pours into 8kg sodium metasilicate in brightening agent slot until sodium metasilicate is completely dissolved and brightening agent is made.
The flowmeter that the outlet of stainless steel brightening agent slot is adjusted according to defibrator wood chip Feed metering device, makes the amount of brightening agentControl is the 0.6% of wood chip weight.
Not by brightening agent handle fiberboard whiteness value be 28 degree, by above-mentioned brightening agent processing fiberboard it is whiteAngle value is 34.6 degree.
Embodiment 2
The wood raw material that stainless steel brightening agent slot (about 1 cubic metre of volume) with blender is placed in fibreboard production line is cutAbove piece machine discharge port to the wood chip belt conveyer continuously run between defibrator preheating cooker feed inlet.
The modulation of brightening agent: 280kg water is poured into stainless steel brightening agent slot, the sodium chlorite for then sequentially adding 44kg is moltenLiquid (mass concentration 40%), the hydrogenperoxide steam generator (mass concentration 37%) of 60kg, starts stirring for stainless steel brightening agent slotIt mixes machine and pours into 6kg sodium metasilicate in brightening agent slot until sodium metasilicate is completely dissolved and brightening agent is made.
The flowmeter that the outlet of stainless steel brightening agent slot is adjusted according to defibrator wood chip Feed metering device, makes the amount of brightening agentControl is the 0.5% of wood chip weight.
The whiteness value for the fiberboard not handled by brightening agent is 27.7 degree, the fiberboard by the processing of above-mentioned brightening agentWhiteness value is 34.2 degree.
Embodiment 3
The wood raw material that stainless steel brightening agent slot (about 1 cubic metre of volume) with blender is placed in fibreboard production line is cutAbove piece machine discharge port to the wood chip belt conveyer continuously run between defibrator preheating cooker feed inlet.
The modulation of brightening agent: 280kg water is poured into stainless steel brightening agent slot, the sodium chlorite for then sequentially adding 52kg is moltenLiquid (mass concentration 40%), the hydrogenperoxide steam generator (mass concentration 37%) of 68kg, starts stirring for stainless steel brightening agent slotIt mixes machine and pours into 10kg sodium metasilicate in brightening agent slot until sodium metasilicate is completely dissolved and brightening agent is made.
The flowmeter that the outlet of stainless steel brightening agent slot is adjusted according to defibrator wood chip Feed metering device, makes the amount of brightening agentControl is the 0.7% of wood chip weight.
The whiteness value for the fiberboard not handled by brightening agent is 27.5 degree, the fiberboard by the processing of above-mentioned brightening agentWhiteness value is 34.9 degree.
From the foregoing, it will be observed that method of the invention can brighten fiberboard online, production efficiency is had substantially no effect on.Not intoThe whiteness value for the fiberboard that row brightens processing is generally 27.3 degree or so, and brighten online the whiteness of treated fiberboardValue is 34.8 degree or so, and whiteness value improves about 7.5 degree.Online whitening technology of the invention production-line technique is not made it is anyUnder conditions of change, brightening agent applied amount can reach for 0.6% or so of ligneous materials (moisture content 40%) weight such as timberTo expected whitening effect.
It will be understood by those skilled in the art that above embodiments are only exemplary embodiments, without departing substantially from spirit of the inventionIn the case where range, a variety of variations can be carried out, replaced and changed.