CN101798746B - Energy-saving scouring and bleaching method - Google Patents
Energy-saving scouring and bleaching method Download PDFInfo
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- CN101798746B CN101798746B CN201010116191XA CN201010116191A CN101798746B CN 101798746 B CN101798746 B CN 101798746B CN 201010116191X A CN201010116191X A CN 201010116191XA CN 201010116191 A CN201010116191 A CN 201010116191A CN 101798746 B CN101798746 B CN 101798746B
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Abstract
The invention relates to an energy-saving scouring and bleaching method comprising the following steps: adding water and additive to fabric at 40 DEG C; increasing the temperature fabric of the fabric to 98 DEG C, and keeping the temperature of 98 DEG C for 30 min; washing the fabric, decreasing the temperature of the fabric to 75 DEG C, discharging the water, and controlling the temperature at 75 DEG C or below 75 DEG C; adding water and acetic acid HAC to the fabric for the second time, increasing the temperature of the fabric to 60 DEG C, keeping the temperature of 60 DEG C for 15 min, discharging water, and controlling the temperature at 60 DEG C or below 60 DEG C; adding water to the fabric for the third time for 5 min, discharging water; adding water to the fabric for the fourth time, and dying the fabric. The additive comprises the following components by weight percent: 2.5-5.5 percent of ethylene diamine tetraacetic acid (EDTA), 0-0.5 percent of hydrogen peroxide stabilizer, 5-15 percent of bleaching synergist, 10-15 percent of chelating agent, 54.5-77 percent of alkaline agent and 5-10 percent of surfactant. The invention solves the problems of long scouring and bleaching time and high energy consumption existing in the prior art.
Description
Technical field
Present technique belongs to the environmental protection technical field of scouringing and bleaching, and particularly relates to a kind of energy-saving scouring and bleaching method.
Background technology
Natural fabrics such as cotton, fiber crops contain inherent impurity and pigment, and its pre-treatment processing tasks is heavy, and great to the quality influence of following process and final products.Simultaneously, the pre-treatment process of natural fabric also is the link that chemicals is maximum, pollution is the most serious that water consumption in the textile dyeing and finishing process, power consumption are maximum, need usefulness.Thereby; Carry out the innovation of natural fabric pre-treatment process; Develop new, as to meet that " three E " system (usefulness Efficiency, economic Economy and environment Environment) requires energy-conservation, water saving, eco-friendly auxiliary agent, technology and technology, imperative.
Cotton fabrics is made up of cotton fiber.The pectic substance that contains 0.9-1.0% on the cotton fiber, the grease wax of 0.5-0.6%, the nitrogen substance of 0.2-0.5%, natural impuritys (being referred to as the commensal of cotton fiber) such as the ash content of 0.7-1.0% and a spot of pigment also have cotton seed hulls (being referred to as accompaniment).Commensal mainly is present in the cuticula and first rubber wall of cotton fiber, and their existence makes cotton fiber have hydrophobicity, influences water imbibition, hinders the infiltration and the diffusion of dyeing process dyestuff, and cotton seed hulls influences the outward appearance of fabric.So cotton fabrics must float operation boiling of its dyeing and finishing commensal, accompaniment are removed, to guarantee wetting permeability, whiteness and the outward appearance of cotton fiber, for necessary condition is created in follow-up dyeing, stamp, back arrangement.
General at present one step of the alkali oxygen single bath process that adopts is floated in cotton knitting boiling.Originally traditional kiering, bleaching two step method, time long eliminate big because of the power consumption water consumption, and no longer recommend to use because of the halogen environmental issue with technologies such as sodium hypochlorite bleaching and sodium chlorites after the kiering.
In alkali oxygen boiling, bleaching-bathing method; With hydrolytic reagent and the saponification agent of caustic soda as nitrogen substance, pectin, grease wax; Caustic soda also is the swelling agent of cotton seed hulls, use again surfactant as the refining agent of major ingredient with analyte emulsification, dispersion and washing, and remove from cotton fiber; And be the bleaching major ingredient with the hydrogen peroxide solution, hydrogen peroxide solution decomposes under certain condition, and its catabolite destroys pigment and plays discoloration, removes pigment.The final impurity of removing; Reach due whiteness, hair effect (capillary effect); But these reactions all must at high temperature be carried out, and the discoloration of hydrogen peroxide solution simultaneously also will be in better effects if more than 95 ℃, and it is very slow that decomposing hydrogen dioxide solution goes out the speed of effective bleaching composition when low temperature; Therefore traditional handicraft all is at 100 ℃, boils and floats time 60-90 minute.Even boil in 105-110 ℃ the high-temperature high-pressure apparatus and float time 30-50 minute, it is very big to consume quantity of steam, and 1 ton of cotton knitwear boils to float and needs 5～6 tons of steam approximately, accounts for about 60% of whole dyeing and finishing steam consumption.
Utilize chemical method to carry out the cotton fabrics low-temperature blanching; Use with mutually with hydrogen peroxide solution activator, hydrogen peroxide solution, alkali, surfactant; Under 70～80 ℃, boil float-the method pre-treatment of bath reaches the report that better whiteness, hair are imitated, but the concrete composition and the ratio of undeclared activator; Also useful sodium pyrophosphate, calgon, sodium metasilicate and hydrogen peroxide solution carry out cold bleaching, and the operation through one emulsifying agent high temperature emulsification removal grease wax can reach and should produce effect, the boiling, bleaching-bathing but this technology is unrealized again; Also useful chlorinated polyvinyl chloride, pine tar, surfactant, caustic soda, hydrogen peroxide solution and sodium metasilicate carry out low-temperature blanching, but because of chlorinated polyvinyl chloride has the environmental issue of organic halogen (AOX), and the consumption cost is high and can not promote.
Use the hydrogen peroxide bleaching activator; The decomposition temperature of hydrogen peroxide solution is reduced, and enable to bring into play the effective resolution ratio raising of hydrogen peroxide solution of discoloration and activator and the higher material of hydrogen peroxide solution reaction generation bleaching effect; Like peracetic acid, the serviceability temperature of bleaching reduces.Activator has been used in detergent industry for many years, as containing sodium peroxydisulfate (decompositing the material of hydrogen peroxide solution) and corresponding activator in the most washing powder of the U.S..The activator of research has tens of kinds at present; Like ethylenediamine tetra-acetic acid (EDTA), pelargonyl group Oxybenzene sulfonate (NOBS), benzoyl beta-lactam, methyl benzamide beta-lactam, tert-butoxy benzoyl beta-lactam, N-acyl group valerolactam etc. and their mixture thereof or the like, but because of manufacturing, the price of activator, originate and be used for boiling of cotton fabrics and float the problems such as control of bleaching effect and decomposing hydrogen dioxide solution speed and use wideless.
Remove in the tradition boiling, bleaching-bathing technology and add hydrogen peroxide solution, caustic soda; Also to add auxiliary agent more than three kinds such as hydrogen peroxide bleaching stabilizer, chelating agent, brightening agent, refining agent; Troublesome poeration, inaccurate in the operation as long as a kind of auxiliary agent adds, just might have influence on cotton fabrics and boil and float crudy.
In sum, existing technology not only effect can not meet the demands, and water is many, power consumption is serious, does not meet the environmental requirement of modern industry, demands urgently improving.
Summary of the invention
The technical problem that the present invention will solve provides a kind of energy-saving scouring and bleaching method, to solve the problem that energy consumption is big in the prior art, the time is long.
The technical solution adopted for the present invention to solve the technical problems is: a kind of energy-saving scouring and bleaching method is provided, may further comprise the steps:
A. a formulation auxiliary agent is added in water inlet in the time of 40 ℃ simultaneously; Temperature is elevated to 98 ℃, and with this temperature maintenance 30 minutes;
B. wash, and temperature is dropped to 75 ℃, draining then (after the draining temperature be≤75 ℃);
C. water inlet is for the second time added acetic acid HAC simultaneously and temperature is elevated to 60 ℃, and with this temperature maintenance 15 minutes, draining then (after the draining temperature be≤60 ℃);
D. water inlet for the third time, and continue 5 minutes, draining then;
E. the 4th water inlet gets into dyeing process.
The composition of a described formulation auxiliary agent comprises: edta edta 2.5～5.5%, hydrogen peroxide stabilizer 0～0.5%, bleach boosters 5～15%, chelating agent 10～15%, alkaline agent 77～54.5%, surfactant 5～10%, more than its composition by weight percentage.
Bath raio among the described step a is 1: 10, and a described formulation auxiliary agent dosage is 5g/l, is benchmark with the dye liquor volume, and continues to add 3 minutes; Acetic acid HAc dosage is 0.8g/l among the described step c, is benchmark with the dye liquor volume.
Rate of rise in temperature among the described step a is 3.5 ℃/min; Temperature decrease speed among the step b is 3 ℃/min; Rate of rise in temperature among the step c is 3.5 ℃/min.
Beneficial effect
1. energy saving and cost lowering:
One formulation solid additive of Application and Development is achieved the cotton fabrics energy-saving scouring and bleaching, energy-conservation boiling, bleaching-bathing processing, and it boils the whiteness, the hair that float effect and traditional 98-100 ℃ of high temperature alkali-oxygen one bath technology imitates close.Compare with traditional handicraft, can economize on water, electricity, vapour (table three), make and shorten 1.7 hours process time, cotton seed hulls is removed clean, and does not need to add in addition antifoaming agent in the processing, and loss of strength reduces more than 5%, overall cost decline.
2. easy to operate:
Realize in the processing that a kind of auxiliary agent substitutes auxiliary agent more than three kinds such as hydrogen peroxide bleaching stabilizer, chelating agent, brightening agent, refining agent, easy to operate; One formulation solid additive composition of exploitation belongs to environment-friendly products, also is fit to the processing of foreign trade product.
3. practical:
To see from test, the auxiliary agent Application and Development floats boiling of shallow-middle look, responsive look and dark blue, bright red, black-and be successful in the dyeing, the energy-saving scouring and bleaching feasible process; Estimate about 100,000 yuan of annual savings; Adding that grey cloth reduces floats damage, can save 600,000, adds up to and saves 700,000.
Simultaneously, new technology is floated the effect of end poststaining, and is consistent with effect after the traditional handicraft dyeing, has versatility, can under the situation that does not change technology, replace.
Description of drawings
Fig. 1 is an implementation step of the present invention.
Fig. 2 is the common process implementation step.
The specific embodiment
Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiment only to be used to the present invention is described and be not used in the restriction scope of the present invention.Should be understood that in addition those skilled in the art can do various changes or modification to the present invention after the content of having read the present invention's instruction, these equivalent form of values fall within the application's appended claims institute restricted portion equally.
Embodiment 1
Energy saving technique of having developed and effect:
One, step as shown in Figure 1 is implemented, and compares (implementation step is as shown in Figure 2) with common process, and its technology preparation such as following table are said:
Table one
| Technology preparation | Energy-saving scouring and bleaching technology | Common process |
| Hydrogen peroxide solution | -- | 5g/ |
| Sheet alkali | -- | 1.6g/l |
| Scouring agent | -- | 0.3g/l |
| Hydrogen peroxide stabilizer | -- | 1g/l |
| One formulation solid additive | 5g/l | -- |
| Bath raio | 1∶10 | 1∶10 |
| Temperature/time | One formulation solid additive effect 98 ℃/30 ' | Common process 98 ℃/50 ' |
| The deoxidation enzyme | -- | 0.1g/l |
| HAc | 0.8g/l | 0.8g/l |
| The water number of times | 4 roads | 7 roads |
Two, effect:
Table two
Remarks:
1. traditional: as to be traditional oxygen bleaching process.
2. energy saving technique 4 secondary data of developing: with 4 test datas of energy saving technique of a formulation solid additive composition of developing.
3. hair is imitated (capillary effect): measure unit by the F2/T01071 standard: cm/30min.
4. whiteness: Hunterlab.ULTRA.SCAN X type color measurement and color match appearance, measure by the GB/T8424.2-2001 standard.
5. bursting strength: YG (B) the 031T type tensometer that Wenzhou Daiei textile instrument company produces, measure (unit: newton) by the GB/T14800-93 standard.
6. strength damage percentage % be boil float before and after the powerful difference percentage powerful with grey cloth, test used 32 all cotton undershirt cloths boil float before powerful 280 newton of grey cloth, 32 wash/before cotton spandex single jersey boils and floats the grey cloth brute force be 210 newton, 32 wash/cotton single jersey boils that to float preceding grey cloth brute force be 500 newton.
7. the grey cloth loss reduces 0.4-0.5%, and annual cost saving is pressed 10000kg cloth and calculated 10000kg * 0.005=50kg.With 40 yuan/kg of finished product product, produce 10 tons daily, calculated, can economize in 1 year in annual 300 days:
Ten thousand yuan in 50kg/10 ton sky * 300 days * 40 yuan/kg=60
Three, cost effectiveness:
Table three
| Project | Energy-saving scouring and bleaching technology | Common process | Save |
| Total water (ton/ton cloth) | 4 roads/40 ton | 7 road water/70 |
3 roads/30 ton |
| Total with vapour (ton/ton cloth) | 1.8 ton | 3.42 ton | 1.62 ton |
| Total electricity consumption (degree/ton cloth) | 150 degree | 249.6 degree | 99.6 degree |
| Total blowdown (ton/ton cloth) | 40 tons | 70 tons | 30 tons |
| Total time (hour/ton cloth) | 2.5 hour | 4.2 hour | 1.7 hour |
| Totle drilling cost (unit/ton cloth) | 1095 yuan/ton | 1466.6 unit/ton | 371.6 unit/ton |
1. pre-treatment energy-saving scouring and bleaching technology is pressed 1: 10 bath raio, but cloth using water wisely 30T per ton, and waste water discharges 30T less.
2. new technology once is warmed up to 98 ℃, once is warmed up to 60 ℃, calculates by 10 ° every liter consumption vapour 0.18T, uses steam 1.8T/ ton cloth altogether, and traditional handicraft need consume steam 3.42T/ ton cloth, saves steam 1.62T/ ton cloth.
3. energy-saving scouring and bleaching technology 150min consuming time altogether presses per hour power consumption 60 degree, altogether power consumption 150 degree.
Traditional handicraft 250min consuming time altogether presses per hour power consumption 60 degree, altogether power consumption 250 degree.
Claims (3)
1. energy-saving scouring and bleaching method is characterized in that: may further comprise the steps:
(a) a formulation auxiliary agent is added in water inlet in the time of 40 ℃ simultaneously; Temperature is elevated to 98 ℃, and with this temperature maintenance 30 minutes; Wherein, The composition of one formulation auxiliary agent comprises: edta edta 2.5～5.5%, hydrogen peroxide stabilizer 0～0.5%, bleach boosters 5～15%, chelating agent 10～15%, alkaline agent 54.5～77%, surfactant 5～10%, more than its composition by weight percentage;
(b) wash, and temperature dropped to 75 ℃, draining then, after the draining temperature be≤75 ℃;
(c) secondary water inlet is added acetic acid HAc simultaneously and temperature is elevated to 60 ℃, and with this temperature maintenance 15 minutes, draining then, after the draining temperature be≤60 ℃;
(d) three water inlets, and continue 5 minutes, draining then;
(e) four water inlets get into dyeing process.
2. a kind of energy-saving scouring and bleaching method according to claim 1 is characterized in that: the bath raio in the described step (a) is 1: 10, and a described formulation auxiliary agent dosage is 5g/l, is benchmark with the dye liquor volume, and continues to add 3 minutes; Acetic acid HAc dosage is 0.8g/l in the described step (c), is benchmark with the dye liquor volume.
3. a kind of energy-saving scouring and bleaching method according to claim 1 is characterized in that: the rate of rise in temperature in the described step (a) is 3.5 ℃/min; Temperature decrease speed in the step (b) is 3 ℃/min; Rate of rise in temperature in the step (c) is 3.5 ℃/min.
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| CN105113203A (en) * | 2015-09-16 | 2015-12-02 | 太仓市国峰纺织印染有限责任公司 | Dyeing preprocessing method for spandex fiber fabric |
| CN107841866B (en) * | 2017-11-29 | 2020-05-12 | 互太(番禺)纺织印染有限公司 | Preparation method of white fabric |
| CN109295688A (en) * | 2018-09-27 | 2019-02-01 | 沈明峰 | A kind of Scouring and bleaching process of cotton silk fabric mixed cloth |
| CN112080927A (en) * | 2019-06-13 | 2020-12-15 | 青岛奥洛思新材料有限公司 | Oxygen bleaching auxiliary agent for hemp fiber boiling and bleaching process and preparation method thereof |
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| CN101324024A (en) * | 2007-06-12 | 2008-12-17 | 江苏盛虹化纤有限公司 | Cotton fabric cold pad batch pretreatment technology |
| CN101418513A (en) * | 2008-10-28 | 2009-04-29 | 宁波新阳纺织印染有限公司 | One dosage form solid additive for cotton knitted fabric one bath boiling and bleaching process at low temperature |
| CN101487184A (en) * | 2009-02-17 | 2009-07-22 | 宁波广源纺织品有限公司 | Low-temperature scouring and bleaching adjuvant composition and method for producing the same |
| CN101487183A (en) * | 2009-02-17 | 2009-07-22 | 宁波广源纺织品有限公司 | Method for environment-friendly low-temperature scouring and bleaching in spinning dyeing and finishing |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101324024A (en) * | 2007-06-12 | 2008-12-17 | 江苏盛虹化纤有限公司 | Cotton fabric cold pad batch pretreatment technology |
| CN101418513A (en) * | 2008-10-28 | 2009-04-29 | 宁波新阳纺织印染有限公司 | One dosage form solid additive for cotton knitted fabric one bath boiling and bleaching process at low temperature |
| CN101487184A (en) * | 2009-02-17 | 2009-07-22 | 宁波广源纺织品有限公司 | Low-temperature scouring and bleaching adjuvant composition and method for producing the same |
| CN101487183A (en) * | 2009-02-17 | 2009-07-22 | 宁波广源纺织品有限公司 | Method for environment-friendly low-temperature scouring and bleaching in spinning dyeing and finishing |
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