CN101012620A - Original cloth blanching process and apparatus - Google Patents
Original cloth blanching process and apparatus Download PDFInfo
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- CN101012620A CN101012620A CNA2007100132528A CN200710013252A CN101012620A CN 101012620 A CN101012620 A CN 101012620A CN A2007100132528 A CNA2007100132528 A CN A2007100132528A CN 200710013252 A CN200710013252 A CN 200710013252A CN 101012620 A CN101012620 A CN 101012620A
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Abstract
The invention discloses a pure bleaching process for original cloth and the equipment, belonging to the bleaching area of original cloth in printing and dyeing industry. The merit of pure bleaching process is that chlorine dioxide solution is used to bleach original clothes directly so as to improve bleaching efficiency effectively and decrease the production cost. The related equipment comprises bleaching tank, chlorine dioxide generator, chlorine dioxide absorption tank, storage tank for chlorine dioxide solution, piling clothes machine, watering and prearranging tank, and alkalizing funnel so on. They are existing equipment in prior technology. Compared with the prior technology, not only the process of invention and the equipment can accomplish the process easily but also the printing and dyeing industry can decrease the equipment input according to the condition of original equipment to the utmost.
Description
Technical field
The present invention relates to a kind of former cloth method for bleaching, specifically a kind of is the original cloth blanching process and the employed equipment thereof of bleaching agent with the chlorine dioxide.
Background technology
At the former cloth bleaching process of textile printing and dyeing industry, the most common method for bleaching comprises hypochlorite (calcium hypochlorite, clorox) bleaching, hydrogen peroxide bleaching and chlorite bleaching etc.
Calcium hypochlorite (bleaching powder) bleaching process is more original, be in 95 ℃ of water with bleaching powder bleaching, big, the consuming time length of water consumption, efficient is low, cost is higher, only has the small-sized printing and dyeing mill of part also using now.
The bleaching liquor pH value of sodium hypochlorite bleaching is about 10, carries out at normal temperatures, and equipment is simple, easy to operate, cost is low, but big to the fabric intensity damage, whiteness is lower.
The bleaching liquor pH value of hydrogen peroxide bleaching is 10, bleaches under high temperature (90～100 ℃), and the BLEACHED FABRIC whiteness is high and stablize, and good hand touch can also be removed slurry and natural impurity, but equipment is required height, and cost is higher.
Chlorite bleaching is directly to add sodium chlorite, formic acid (or hydrochloric acid) in bleaching tank recirculated water, and the generation chlorine dioxide takes place to decompose in bleaching tank sodium chlorite bleaches.Fabric whiteness with the bleaching of this method is good, and fibre damage is little, but exists operating time long (on average will above 3 hours), water temperature to require height shortcomings such as (more than 80 ℃), and raw material sodium chlorite price is higher, explosive, not easy to store, and accident potential is bigger.
A kind of " with the method for chlorine dioxide continuous bleaching string " in being the patent documentation of CN 1270014C, patent publication No. disclosed.This method is to float in the case at special gas, utilizes chlorine dioxide that fabric is bleached.But well-known, chlorine dioxide is unstable in air, when airborne volumetric concentration surpasses 10% the possible of blast is arranged just.This makes and has bigger potential safety hazard with the chlorine dioxide bleaching.In addition, using chlorine dioxide to bleach also needs special gas to float a whole set of new equipment of case and corresponding technology, and equipment such as original bleaching tank can't be used, and have increased the equipment input cost of printing and dyeing mill.
Summary of the invention
Technical assignment of the present invention is at above-mentioned the deficiencies in the prior art, provide a kind of technology simply, efficiently, original cloth blanching process cheaply.
Second technical assignment of the present invention provides the equipment that is used to realize above-mentioned technology.
Technical assignment of the present invention is realized in the following manner: utilize ClO 2 solution that former cloth is bleached, bleaching process may further comprise the steps:
A, will permeate good former cloth and put into bleaching tank, and inject suitable quantity of water, the beginning circulated sprinkling;
B, in bleaching tank, add ClO 2 solution, make that chlorine dioxide concentration reaches 600-900ppm in jar interior bleaching liquor by the spray circulation line;
After the temperature of c, bleaching liquor to be recycled rises to 45 ℃-60 ℃, insulation 20-40min;
D, add in sodium hydrogensulfite or the dodium thiosulfate and dechlorination;
E, wash out cloth.
Among step a, the b, at first in bleaching tank, inject the water of 1/3-1/2 water consumption, will permeate good former cloth then and put into bleaching tank, the beginning circulated sprinkling; The water of surplus adds in the bleaching tank by the spray circulation line together with ClO 2 solution, makes the concentration of chlorine dioxide in jar interior bleaching liquor reach 700-800ppm.
Inject preferred 30 ℃-40 ℃ of the temperature of the water of bleaching tank among the step a, the mass ratio of water injection rate and former cloth (the preceding dried cloth of infiltration) is 2～4: 1.
The pH value of bleaching liquor preferably is controlled in the scope of 6-9, can be by add the control of soda ash realization to pH value in bleaching tank.
Be used to realize the equipment of above-mentioned blanching process, comprise bleaching tank, chlorine dioxide generator, chlorine dioxide tourie, ClO 2 solution storage tank, heap cloth device, add water preparation jar and add the alkali funnel, bleaching tank is connected with heap cloth device by conveyer belt, bleaching tank is provided with the spray circulation line outward, chlorine dioxide generator, chlorine dioxide tourie and ClO 2 solution storage tank insert the spray circulation line by pipeline series connection back, add water preparation and jar insert the spray circulation line, add the alkali funnel and add water preparation jar and be connected by pipeline.
In order to make Bleaching Quality more stable, reduce the error that manual operation brings, between ClO 2 solution storage tank and spray circulation line, measuring tank can be set.
Can be provided with and spray the harmless process tank that circulation line is connected, to reduce pollution air.
Related equipment is commercially available product in the whole technology of the present invention, wherein, bleaching tank, heap cloth device, add water preparation jar and add the alkali funnel identical with the relevant device of existing dyeing; The preferred high-pure chlorinedioxide generator of chlorine dioxide generator (product purity of chlorine dioxide＞97%).
Original cloth blanching process of the present invention compared with prior art directly utilizes ClO 2 solution that former cloth is bleached, and has following outstanding beneficial effect:
(1) chlorine dioxide that generates in the chlorine dioxide generator directly enters bleaching tank former cloth is bleached, and is not less than in Bleaching Quality on the basis of floating the Asia, can shorten bleaching time greatly, enhances productivity;
When (2) generating chlorine dioxide with chlorine dioxide generator, can select suitable reactant according to actual conditions, as use sodium chlorate, hydrogen peroxide and sulfuric acid reaction to produce chlorine dioxide, the price of sodium chlorite during not only the price of reactant sodium chlorate is floated well below chlorine, and the raw material availability height, can save a large amount of costs of material for printing and dyeing enterprise;
(3) add part water in the bleaching tank earlier, spray adds the water of surplus again when circulating and the method for chlorine dioxide makes faster more uniform being distributed in the jar of bleaching liquor, has both helped controlling Bleaching Quality, has further shortened bleaching time again;
(4) the bleaching temperature requirement is low, saves operating cost;
(5) aqueous solution of chlorine dioxide ten minutes stability and safety, the deficiency of the accident of easily blasting when having overcome the chlorine dioxide bleaching;
(6) related equipment is existing device in the prior art, bleaching tank wherein, heap cloth device, adds water preparation jar and adds the existing especially printing and dyeing enterprise common equipment of alkali funnel, and the equipment input of printing and dyeing enterprise can greatly reduce.
Description of drawings
Accompanying drawing 1 is the process chart of original cloth blanching process of the present invention.
The specific embodiment
Explain below original cloth blanching process of the present invention being done with specific embodiment with reference to accompanying drawing.
Embodiment 1: former cloth weighs 1 ton; About 3 tons of water (being added into the water in the bleaching tank)
As shown in Figure 1, be used to realize that the equipment of blanching process of the present invention comprises bleaching tank 1, chlorine dioxide generator 2, chlorine dioxide tourie 3, ClO 2 solution storage tank 4, heap cloth device 5, adds water preparation jar 6, adds alkali funnel 7, measuring tank 8 and harmless process tank 9.Wherein:
Bleaching tank 1: with the equipment of chlorine dioxide bleaching liquor with former cloth bleaching;
Chlorine dioxide generator 2: the equipment of preparation chlorine dioxide requires the gained purity of chlorine dioxide to be higher than 97%;
Chlorine dioxide tourie 3: absorb the equipment of chlorine dioxide, the chlorine dioxide body portion that produces in the generator 2 further is dissolved in the solution, increase the concentration of ClO 2 solution;
ClO 2 solution storage tank 4: ClO 2 solution is kept in equipment;
Heap cloth device 5: the equipment of former cloth being put into and carrying out with penetrating fluid (water) penetration operation;
Add water preparation jars 6: store water and with the equipment of water preheat;
Add alkali funnel 7: add in the water preparation jar 6 through this funnel alkali that dechlorination is used, through pipeline alkali lye is injected in the bleaching tank then;
Measuring tank 8: the equipment that aqueous solution of chlorine dioxide is measured;
Harmless process tank 9: the equipment that the waste gas liquid that bleaching tank 1 and spray are overflowed in the circulation line carries out harmless processing.
The preparation of ClO 2 solution:
1, being reactant with sodium chlorate, hydrogen peroxide, sulfuric acid, is that reactor generates ClO 2 solution (comprising the part gaseous chlorine dioxide) with chlorine dioxide generator 2;
2, the ClO 2 solution of Sheng Chenging is delivered to chlorine dioxide tourie 3, and most gaseous chlorine dioxides are dissolved in the solution in jar, obtains the ClO 2 solution that concentration is 2000-3000ppm;
3, it is temporary standby that ClO 2 solution is delivered to ClO 2 solution storage tank 4.
Blanching step is:
1, former cloth is put into heap cloth device 5 after weighing, sew up the leftover of bolt of cloth, adds penetrating fluid (water) and carries out osmotic treated, about 30min of time spent;
2, the water that will be preheated to 30 ℃-40 ℃ injects bleaching tank 1 for 1.0 tons, utilizes conveyer belt will permeate good former cloth then and delivers in the bleaching tank 1, opens spray circulation line control valve and begins circulated sprinkling;
3,2.0 tons in the water of surplus adds in the bleaching tank 1 by the spray circulation line together with ClO 2 solution, makes the concentration of chlorine dioxide in jar interior bleaching liquor reach about 750ppm;
4, in the spray cyclic process, utilize the water vapour heating in bleaching tank 1 chuck, after the bleaching liquor temperature reaches 50 ℃, insulation 30min (pH value is 7.0 ± 0.5 in the maintenance jar);
5, through add alkali funnel 7, add water preparation jars 6, the spray circulation line adds in an amount of solution of sodium bisulfite and after the dechlorination to bleaching tank 1 in, bleeds off bleaching liquor, process can go out cloth after washing again, finishes bleaching process.
The waste gas liquid that bleaching tank 1 overflows discharging after harmless process tank 9 is handled.
Finish bleaching required time about 1 hour 30 minutes (heating-up time+temperature retention time), 3 hours of more original inferior bleaching process, the time of every jar of cloth bleaching shortens half.
Embodiment 2: former cloth weighs 1 ton; About 3 tons of water (being added into the water in the bleaching tank)
The preparation process of equipment needed thereby and chlorine dioxide is identical with embodiment 1.
Blanching step:
1, former cloth is put into heap cloth device 5 after weighing, sew up the leftover of bolt of cloth, adds penetrating fluid (water) and carries out osmotic treated, about 30min of time spent;
2, the water that will be preheated to 30-40 ℃ injects bleaching tank 1 for 1 ton, utilizes conveyer belt will permeate good former cloth then and delivers in the bleaching tank 1, opens spray circulation line control valve and begins circulated sprinkling;
3, by the spray circulation line ClO 2 solution is added in the bleaching tank 1, make the concentration of chlorine dioxide in jar interior bleaching liquor reach about 800ppm;
4, in the spray cyclic process, utilize the water vapour heating in bleaching tank 1 chuck, after the bleaching liquor temperature reaches 55 ℃, insulation 35min (pH value is 7.0 ± 0.5 in the maintenance jar);
5, through add alkali funnel 7, add water preparation jars 6, the spray circulation line adds in an amount of solution of sodium bisulfite and after the dechlorination to bleaching tank 1 in, bleeds off bleaching liquor, can go out cloth again after washing, and finishes bleaching process.
The waste gas liquid that bleaching tank 1 overflows discharging after harmless process tank 9 is handled.
Finish bleaching required time about 1 hour 50 minutes (heating-up time+temperature retention time).
Claims (7)
1, original cloth blanching process is characterized in that utilizing ClO 2 solution to bleach, and may further comprise the steps:
A, will permeate good former cloth and put into bleaching tank, and inject suitable quantity of water, the beginning circulated sprinkling;
B, in bleaching tank, add ClO 2 solution, make that chlorine dioxide concentration reaches 600-900ppm in jar interior bleaching liquor by the spray circulation line;
After the temperature of c, bleaching liquor to be recycled rises to 45 ℃-60 ℃, insulation 20-40min;
D, add in sodium hydrogensulfite or the dodium thiosulfate and dechlorination;
E, wash out cloth.
2, original cloth blanching process according to claim 1 is characterized in that among step a, the b, at first injects the water of 1/3-1/2 water consumption in bleaching tank, will permeate good former cloth then and put into bleaching tank, the beginning circulated sprinkling; The water of surplus adds in the bleaching tank by the spray circulation line together with ClO 2 solution, makes the concentration of chlorine dioxide in jar interior bleaching liquor reach 700-800ppm.
3, original cloth blanching process according to claim 1 is characterized in that the temperature of the water of injection bleaching tank among the step a is 30 ℃-40 ℃, and the mass ratio of water injection rate and former cloth is 2～4: 1.
4, original cloth blanching process according to claim 1, the pH value that it is characterized in that bleaching liquor is 6-9.
5, be used to realize the equipment of the described blanching process of claim 1, it is characterized in that comprising bleaching tank, chlorine dioxide generator, chlorine dioxide tourie, ClO 2 solution storage tank, heap cloth device, add water preparation jar and add the alkali funnel, bleaching tank is connected with heap cloth device by conveyer belt, bleaching tank is provided with the spray circulation line outward, chlorine dioxide generator, chlorine dioxide tourie and ClO 2 solution storage tank insert the spray circulation line by pipeline series connection back, add water preparation and jar insert the spray circulation line, add the alkali funnel and add water preparation jar and be connected by pipeline.
6, original cloth blanching equipment according to claim 5 is characterized in that being provided with measuring tank between ClO 2 solution storage tank and spray circulation line.
7, original cloth blanching equipment according to claim 5 is characterized in that also being provided with and sprays the harmless process tank that circulation line is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100132528A CN101012620A (en) | 2007-01-19 | 2007-01-19 | Original cloth blanching process and apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100132528A CN101012620A (en) | 2007-01-19 | 2007-01-19 | Original cloth blanching process and apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101012620A true CN101012620A (en) | 2007-08-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2007100132528A Pending CN101012620A (en) | 2007-01-19 | 2007-01-19 | Original cloth blanching process and apparatus |
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| CN (1) | CN101012620A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103334291A (en) * | 2013-07-10 | 2013-10-02 | 广西大学 | Method for bleaching cotton fabric by chlorine dioxide |
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2007
- 2007-01-19 CN CNA2007100132528A patent/CN101012620A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103334291A (en) * | 2013-07-10 | 2013-10-02 | 广西大学 | Method for bleaching cotton fabric by chlorine dioxide |
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Open date: 20070808 |