CN101498640A - Fast appraisement method for waste paper-pulp gummy substance control effect - Google Patents
Fast appraisement method for waste paper-pulp gummy substance control effect Download PDFInfo
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- CN101498640A CN101498640A CNA200910068049XA CN200910068049A CN101498640A CN 101498640 A CN101498640 A CN 101498640A CN A200910068049X A CNA200910068049X A CN A200910068049XA CN 200910068049 A CN200910068049 A CN 200910068049A CN 101498640 A CN101498640 A CN 101498640A
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Abstract
The invention belongs to the pulp and paper making field and particularly relates to a method for rapidly assessing the waste paper pulp adhesive substance control effect. The method for rapidly assessing the waste paper pulp adhesive substance control effect is characterized in that after the waste paper pulp is filtered and intercepted, the content of the intercepted substance, the cation demand, the turbidity and the chemical oxygen demand (COD) of waste paper pulp filtrate can be measured at the same time. The invention is suitable for selecting waste paper pulp adhesive substance control agent/system and assessing the effect thereof and has the advantages of easy operation, rapid measurement speed, and the like.
Description
Technical field
The invention belongs to the pulping and paper-making industry, particularly a kind of fast appraisement method of waste paper-pulp gummy substance control effect.
Background technology
The control of gluing thing is a big difficult point in the waste paper recycling process.The gluing thing be meant occur in the waste paper recycling process have stickiness, flexibility and a hydrophobic organic substance, be mainly derived from the adhesive tape and bookbindings such as labels class adhesive, hot melt adhesive glue, wax, ink adhesive, latex, wet strengthening resin and other polymkeric substance that are present in the waste paper, its accumulation brings great harmful effect with the continuous maneuverability and the paper quality of paper feeding machine, increases the consumption of other functional paper making additive and process paper making additive simultaneously.The deposition problems that solves waste paper-pulp gummy substance is an important directions of current wet end chemistry research.Several different methods such as physical treatment process, method of chemical treatment, biology enzyme facture are arranged at present.The action effect of the different gluing thing controlling agents of how to evaluate or the hierarchy of control is a comparatively loaded down with trivial details job.In fact because the diversity of gluing thing, still untappedly so far go out unique, received detection method.Be developed at present or quantitative analysis method on probation has screening method and handsheet detection method at big gluing thing (the gluing thing that can not be trapped by 150 μ m slotted screens), at absorption method, plate attachment method, extraction process, laser particle counting method, hemocytometer counting method, the destabilizing agent precipitation method and the press dewatering precipitation method etc. of little gluing thing (can pass through the gluing thing of 150 μ m slotted screens), but these methods exist or the big or shortcomings such as complicated operation or apparatus expensive or poor repeatability with the slurry amount.
The present invention is according to the characteristic of secondary stock, employing is filtered waste paper pulp through two steps method, measure cationic demand, turbidity and the chemical oxygen consumption (COC) (COD) of waste paper pulp filtrate when measuring trapped substance content, for the action effect of estimating gluing thing controlling agent has fast found an approach preferably.
Summary of the invention
The invention provides a kind of fast appraisement method of waste paper-pulp gummy substance control effect.
The technology path that adopts be waste paper pulp through two steps filter hold back after, measure cationic demand, turbidity and the chemical oxygen consumption (COC) (COD) of waste paper pulp filtrate when measuring trapped substance content.
The fast appraisement method of gummy substance control effect comprises the steps:
1. will by strainer filtering, obtain filtrate A respectively before gluing thing controlling agent or hierarchy of control processing and after the waste paper pulp dilution after handling;
2. get the described filtrate A of step 1, in the solvent filter of glass fiber filter paper is housed, filter, obtain liquor B;
3. weigh after adopting the constant weight method with the trapped substance drying on the described glass fiber filter paper of step 2, calculate the rejection of this part particulate matter, simultaneously the described liquor B of step 2 is carried out the measurement of cationic demand, turbidity and chemical oxygen consumption (COC) (COD);
In step 1, secondary stock is taken from machine forebay underflow, and starching dense is 3%-5%; Before gluing thing controlling agent or the hierarchy of control are handled with processing after waste paper pulp need be diluted to concentration 0.2～0.6%, volume is 500ml; Filtering the filter screen aperture is 200 orders (74 μ m);
In step 2, the filtrate A volume of filtration is 1/5～1 times of the described filtrate A of step 1 cumulative volume, i.e. 100ml～500ml; The glass fiber filter paper aperture is 1.2 μ m; The volume of solvent filter upper funnel is 500ml, and it is 47mm that the bore of filtering table loads diameter;
Effect of the present invention: wood invention is applicable to the screening and the effect assessment thereof of all gluing thing controlling agent/hierarchies of control, have simple to operate, advantage such as finding speed is fast.
Description of drawings
The operation sketch of Fig. 1 gummy substance control effect fast appraisement method
The action effect evaluation of Fig. 2 gluing thing controlling agent
Description of reference numerals
Fig. 2: cationic starch with high substitution degree
The high substituted degree cation guar gum
Embodiment
In order further to understand content of the present invention, characteristics and effect, and conjunction with figs. 1 and Fig. 2 are described in detail as follows:
Embodiment 1:
Cationic starch with high substitution degree and high substituted degree cation guar gum control deinking bleached pulp gluing thing
The secondary stock that is used to test is taken from the reserve pit of certain paper plant's newsprint production line, this secondary stock has passed through pulping, floatation and ink removing, hydrogen peroxide bleaching, operations such as heat dispersion, but do not add any wet end additive as yet, measure its slurry dense (being generally 3%-5%) in advance, take by weighing this secondary stock of 100g, place beaker, the adding degree of substitution is respectively 0.94 and 0.30 cationic starch with high substitution degree and high substituted degree cation guar gum, stir after 3 minutes with distilled water this secondary stock diluted sample to 500g, use 200 orders (74 μ m) strainer filtering again, filtrate A is collected in the beaker, filter (aperture of microfiltration membranes is 1.2 μ m) with the solvent filter that the glass fibre microfiltration membranes is housed then, the microfiltration membranes drying that will contain trapped substance (1.2～74 μ m particle matter) after filtration finishes, adopt the constant weight method to claim its weight, deduct the quality (hereinafter to be referred as the particle matter interception) that the blank filter membrane quality of weighing in advance is 1.2～74 μ m particle matters that are trapped, percentage composition (hereinafter to be referred as the trapped substance percentage composition) according to formula (1) calculating 1.2～74 μ m particle matters calculates its slip (hereinafter to be referred as the trapped substance slip) according to formula (2).
The quality of trapped substance percentage composition=trapped substance/(test secondary stock weight * secondary stock concentration) * 100% formula (1)
Trapped substance slip=(the 1-sticking agent is handled back trapped substance percentage composition/sticking agent and handled preceding trapped substance percentage composition) * 100% formula (2)
It should be noted that if filtrate A is not whole filtrations formula this moment (1) is modified to formula (3)
The quality of trapped substance percentage composition=trapped substance/used filtrate A weight * whole filtrate A weight/(test secondary stock weight * secondary stock concentration) * 100% formula (3)
Filtrate behind micro-filtrate membrane filtration is called liquor B, wherein contains colloidal material and the dissolved substance of particle diameter less than 1.2 μ m.Respectively with the PCD 03pH2S particle charge analyzer of M ü tek company, the desk-top turbidimeter of LP2000211 of Hanna company and cationic demand, turbidity and the COD content of 10 minutes quick dichromate titration mensuration micro-filtrate B.Wherein cationic demand reflection is the power of the electronegative amount of colloidal material and dissolved substance institute, the turbidity reflection be the content of colloidal material, COD then mainly reflect can oxidized decomposition colloidal material and the amount of dissolved substance.
Removal efficient with the rate of change integrating representation gluing thing of above-mentioned each index.It the results are shown in accompanying drawing 2; Compare with cationic starch with high substitution degree, under identical weight base consumption, the high substituted degree cation guar gum makes 1.2～74 μ m trapped substances reduce manyly, makes indexs such as filtrate turbidity descend sooner.
Claims (4)
1, a kind of fast appraisement method of waste paper-pulp gummy substance control effect is characterized in that waste paper pulp through after two steps, filtration was held back, cationic demand, turbidity and the chemical oxygen consumption (COC) (COD) of measurement waste paper pulp filtrate when measuring trapped substance content.
2,, it is characterized in that described two steps filter to hold back to comprise the steps: according to the described gummy substance control effect fast appraisement method of claim 1
2.1 the first step is filtered
To by strainer filtering, obtain filtrate A respectively before gluing thing controlling agent or hierarchy of control processing and after the waste paper pulp dilution after handling;
2.2 second step filtered
Get 2.1 described filtrate A, in the solvent filter of glass fiber filter paper is housed, filter, obtain liquor B;
2.3 validity check
Weigh after adopting the constant weight method with the trapped substance drying on the 2.2 described glass fiber filter paper, calculate the rejection of this part particulate matter, simultaneously 2.2 described liquor B are carried out the measurement of cationic demand, turbidity and chemical oxygen consumption (COC) (COD).
3, described first step filtration is held back according to claim 2.1, it is characterized in that:
Secondary stock is taken from machine forebay underflow, and starching dense is 3%-5%;
Before gluing thing controlling agent or the hierarchy of control are handled with processing after waste paper pulp need be diluted to concentration 0.2～0.6%, volume is 500ml;
Filtering the filter screen aperture is 200 orders (74 μ m).
4, described second step filtration is held back according to claim 2.2, it is characterized in that:
The filtrate A volume that filters is 1/5～1 times of 2.1 described filtrate A cumulative volumes, i.e. 100ml～500ml;
The glass fiber filter paper aperture is 1.2 μ m;
The volume of solvent filter upper funnel is 500ml, and it is 47mm that the bore of filtering table loads diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200910068049XA CN101498640A (en) | 2009-03-06 | 2009-03-06 | Fast appraisement method for waste paper-pulp gummy substance control effect |
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| CNA200910068049XA CN101498640A (en) | 2009-03-06 | 2009-03-06 | Fast appraisement method for waste paper-pulp gummy substance control effect |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102818743A (en) * | 2012-08-07 | 2012-12-12 | 金东纸业（江苏）股份有限公司 | Method for detecting sticky matters of paper making system and method for controlling content of sticky matters of paper making system |
| CN103884644A (en) * | 2012-12-21 | 2014-06-25 | 朱勇强 | Determination method of colloid reservation index on papermaking net |
| CN104422639A (en) * | 2013-08-30 | 2015-03-18 | 天津科技大学 | Detection method of secondary stickers |
| CN108717047A (en) * | 2018-05-25 | 2018-10-30 | 玖龙纸业（太仓）有限公司 | A kind of peeling effect evaluation method for remover |
-
2009
- 2009-03-06 CN CNA200910068049XA patent/CN101498640A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102818743A (en) * | 2012-08-07 | 2012-12-12 | 金东纸业（江苏）股份有限公司 | Method for detecting sticky matters of paper making system and method for controlling content of sticky matters of paper making system |
| CN103884644A (en) * | 2012-12-21 | 2014-06-25 | 朱勇强 | Determination method of colloid reservation index on papermaking net |
| CN104422639A (en) * | 2013-08-30 | 2015-03-18 | 天津科技大学 | Detection method of secondary stickers |
| CN108717047A (en) * | 2018-05-25 | 2018-10-30 | 玖龙纸业（太仓）有限公司 | A kind of peeling effect evaluation method for remover |
| CN108717047B (en) * | 2018-05-25 | 2020-11-10 | 玖龙纸业（太仓）有限公司 | Stripping effect evaluation method for stripping agent |
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Open date: 20090805 |