Method for reducing or removing pentachlorophenol in polyester and polyester blended fabric
Technical Field
The invention relates to the technical field of removing toxic and harmful substance residues on fabrics, in particular to a method for reducing or removing pentachlorophenol in polyester and blended fabrics thereof.
Background
In the international trade of polyester and blended fabrics, the technical STANDARDs of countries and regions of European Union and the like have clear forbidding regulations on residual pentachlorophenol on polyester and blended fabrics, such as STANDARD 100 by OEKO-
Etc., part of international clothing brand buyers such as NIKE, H&M and the like also have clear forbidding regulations on pentachlorophenol in polyester and blended fabrics thereof. However, the residual pentachlorophenol in the polyester and blended fabrics exceeds the standard at present, so that the product is returned, and great loss is caused to both parties of trade.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a method for reducing or removing pentachlorophenol in polyester and blended fabrics thereof, which can effectively remove or greatly reduce pentachlorophenol in polyester and blended fabrics thereof to meet the requirements of relevant standards on the premise of keeping the wearing performance of the polyester and blended fabrics thereof unchanged, particularly keeping the color and light of the polyester and blended fabrics unchanged, and can quickly and uniformly dissolve materials by adopting two different stirring speed modes during dissolving, thereby not only being beneficial to fully performing subsequent reactions, but also reducing the loss of working solution.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for reducing or removing pentachlorophenol in polyester and polyester blended fabrics comprises the following steps:
(1) preparing a working solution: first 25% o.w.f. Na2CO3And/or K2CO3Adding the special refining agent and distilled water into a material melting device in proportion for melting to obtain uniformly mixed pretreatment liquid, wherein the concentration of the special refining agent in the pretreatment liquid is 1.5g/L, then injecting the pretreatment liquid into a jet overflow dyeing machine, injecting distilled water according to the weight of treated textile fabrics until the bath ratio is 1:8, and then operating the machine for 5min to obtain working liquid;
(2) removing residual pentachlorophenol on the textile fabric: and (3) feeding the textile fabric with the pentachlorophenol exceeding the standard into a jet overflow dyeing machine, operating for 30min at the temperature of 40 ℃ according to the traditional dyeing process, then carrying out overflow water washing for 15min, and then carrying out fabric discharging and sizing to obtain a finished product.
The special refining agent used in the invention is an EPA-98A refining agent purchased from Zhejiang Kaider chemical Co., Ltd, is prepared by compounding soda ash, sodium metasilicate, special isomeric alcohol polyoxyethylene ether and water, has the functions of permeation, cleaning and the like, and can effectively remove impurities such as oil solutions, stains and the like on textile fabrics.
In the invention, sodium carbonate or potassium carbonate is a weak acid strong base salt, carbonate ions are hydrolyzed to make the solution alkaline, the sodium carbonate or the potassium carbonate cannot be replaced by other soluble carbonates with alkalinity weaker than that of the sodium carbonate or the potassium carbonate, and the other soluble carbonates have weak alkalinity and cannot react with pentachlorophenol, and in addition, strong base with alkalinity stronger than that of the sodium carbonate or the potassium carbonate is also not available, otherwise, the color of the fabric is damaged.
The principle of removing or reducing pentachlorophenol is: pentachlorophenol is weakly acidic and reacts with sodium carbonate or potassium carbonate to form soluble salts which can be washed from the fabric with water, the reaction equation is shown below:
the melting device comprises an outer barrel and an inner barrel positioned in the outer barrel, and the upper part of the inner barrel is connected with the upper end of the outer barrel through balls, and the lower part of the inner barrel is connected with the lower part of the outer barrel through balls, so that the smooth rotation of the inner barrel is ensured; the inner tube includes the end cover, end cover center department fixedly connected with stretches into the rabbling mechanism of inner tube inner chamber, the rabbling mechanism includes inside hollow feeding piece, link firmly the bull stick of feeding piece lower wall center department, with bull stick roll connection's stirring leaf, the lower part of feeding piece is opening bowl form structure down, the discharge gate of from interior to exterior diffusion is seted up to the lower surface of feeding piece, the stirring leaf includes the blade of circumference equipartition, the outer end of blade inlays and is equipped with magnet, is located eminence such as magnet the inner tube outer wall has set firmly the electromagnet, the inner tube passes through motor drive and rotates and drive feeding piece, bull stick and electromagnet and rotate, the electromagnet rotates with the interact drive stirring leaf of magnet through the electromagnet when rotating.
The end cover is for dismantling the connection, and the rabbling mechanism's of being convenient for installation also is convenient for to the clearance of inner tube, end cover center department is connected with the inlet pipe through the bearing, the inlet pipe passes in the end cover stretches into the feeding piece. The inlet pipe is connected with external feeding metering equipment, and through the setting, when the end cover rotates along with the inner barrel, the inlet pipe does not rotate in a reverse mode, and the stability and the continuity of feeding are guaranteed.
The rotating rod comprises a first rotating rod part and a second rotating rod part which are connected up and down, the outer diameter size of the first rotating rod part is larger than that of the second rotating rod part, and the second rotating rod part is in rolling connection with the stirring blade through a circle of ball bearings embedded in the second rotating rod part; when the inner cylinder rotates and the electromagnet is not electrified, the rotating rod and the electromagnet rotate along with the inner cylinder in a reaction mode and the stirring blade does not rotate, after the electromagnet is electrified, the stirring blade is driven to rotate due to the attraction or repulsion of the electromagnet on the blade, the rotating speed of the stirring blade is changed by enhancing the magnetic strength of the electromagnet, the magnetic strength of the electromagnet is controlled so that the rotating speed of the stirring blade is not the same as that of the inner cylinder, and then the inner cylinder and the stirring blade can stir the working fluid at two different stirring speeds.
A limiting piece is fixedly sleeved at the middle part of the second rotating rod part, the limiting piece is connected with the second rotating rod part in a screw connection mode, the middle part of the stirring blade is abutted between the lower end face of the first rotating rod part and the limiting piece, the stirring blade and the first rotating rod part and the stirring blade and the limiting piece are sealed through sealing rings, and the sealing rings can prevent working liquid from entering the second rotating rod part; in addition, the surfaces of the first rotating rod part, the upper end surface of the limiting part and the middle part of the stirring blade can be coated with polytetrafluoroethylene coatings, so that the stirring blade can rotate more smoothly.
The lower part one side of inner tube is equipped with the liquid outlet, sets up electric valve on the liquid outlet, the tip links firmly the liquid pipe of going out relative from top to bottom with the liquid outlet under the urceolus, go out the intraductal slip of liquid and inlay and be equipped with interior drain pipe, interior drain pipe shifts up through the cylinder drive and makes the liquid outlet lower extreme stretch into in the drain pipe. When the inner barrel rotates to stir the working solution, the liquid outlet is completely separated from the inner liquid outlet pipe, the inner barrel can smoothly rotate, after stirring is finished, the cylinder is started to enable the inner liquid outlet pipe to move upwards along the outer liquid outlet pipe, the lower end of the liquid outlet pipe extends into the inner liquid outlet pipe, and the electric valve switch is opened to discharge the working solution to the jet overflow dyeing machine.
The invention has the beneficial effects that: using pentachlorophenol and Na2CO3、K2CO3The acid-base reaction removes or greatly reduces the residual pentachlorophenol on the terylene and the blended fabric thereof, maintains the wearing performance of the terylene and the blended fabric thereof, particularly maintains the color and light of the terylene and the blended fabric thereof, and meets the technical standard requirement of European Union on for the residual pentachlorophenol in the terylene and the blended fabric thereof; the material melting treatment of the working fluid raw material is carried out by two simultaneous stirring modes of different rotating speeds of the inner cylinder and the stirring blades, so that the raw material melting is faster and more uniform, and the full proceeding of the subsequent reaction is facilitated; in addition, working fluid raw materials can be added while stirring (namely, the feeding piece is driven to rotate by the rotation of the inner cylinder and then added into the workingLiquid raw materials) are added in a dispersing way, so that the uniform and rapid dispersion of the raw materials is further promoted; the melting device is connected with the jet overflow dyeing machine, after the working solution is discharged, the inner cylinder can be cleaned by using distilled water, and the cleaning solution is continuously discharged to the jet overflow dyeing machine so as to reduce the loss of the working solution; in addition, the device can also be used for the chemical material of the dye.
Drawings
FIG. 1 is a schematic structural view of a stirring apparatus according to the present invention;
FIG. 2 is an enlarged view taken at A in FIG. 1;
FIG. 3 is an enlarged view at B of FIG. 1;
FIG. 4 is an enlarged view at C of FIG. 1;
fig. 5 is a schematic bottom view of the feed member of the present invention.
In the figure: the device comprises an outer cylinder 1, an inner cylinder 2, an end cover 21, a bearing 22, a liquid outlet 23, a feeding part 3, a discharge port 31, a rotating rod 4, a first rotating rod part 41, a second rotating rod part 42, a ball 43, a limiting part 44, a sealing ring 45, a stirring blade 5, a blade 51, a magnet 52, an electromagnet 6, a feeding pipe 7, a motor 8, an outer liquid outlet pipe 9, an inner liquid outlet pipe 91 and a cylinder 92.
Detailed Description
The invention is further described with reference to the accompanying drawings and the detailed description below:
example 1
A method for reducing or removing pentachlorophenol in polyester and polyester blended fabrics comprises the following steps:
(1) preparing a working solution: first 20% o.w.f. Na2CO3And 5% of K of o.w.f2CO3Adding the special refining agent and distilled water into a material melting device in proportion for melting to obtain uniformly mixed pretreatment liquid, wherein the concentration of the special refining agent in the pretreatment liquid is 1.5g/L, then injecting the pretreatment liquid into a jet overflow dyeing machine, injecting distilled water according to the weight of treated textile fabrics until the bath ratio is 1:8, and then operating the machine for 5min to obtain working liquid;
(2) removing residual pentachlorophenol on the textile fabric: and (3) feeding the textile fabric with the pentachlorophenol exceeding the standard into a jet overflow dyeing machine, operating for 30min at the temperature of 40 ℃ according to the traditional dyeing process, then carrying out overflow water washing for 15min, and then carrying out fabric discharging and sizing to obtain a finished product.
The material melting device comprises an outer cylinder 1 and an inner cylinder 2 positioned in the outer cylinder 1, wherein the inner cylinder 2 comprises an end cover 21, the center of the end cover 21 is fixedly connected with a stirring mechanism extending into the inner cavity of the inner barrel 2, the stirring mechanism comprises a feeding piece 3 with a hollow inner part, a rotating rod 4 fixedly connected with the center of the lower wall of the feeding piece 3 and a stirring blade 5 in rolling connection with the rotating rod 4, the lower part of the feeding piece 3 is of a bowl-shaped structure with an opening facing downwards, the lower surface of the feeding piece 3 is provided with a discharge hole 31 which diffuses from inside to outside, the stirring blade 5 comprises blades 51 uniformly distributed on the circumference, a magnet 52 is embedded at the outer end of each blade 51, an electromagnet 6 is fixedly arranged on the outer wall of the inner barrel 2 positioned at the same height as the magnet 52, the inner cylinder 2 is driven to rotate by a motor 8 and drives the feeding piece 3, the rotating rod 4 and the electromagnet 6 to rotate, when the electromagnet 6 rotates, the stirring blade 5 is driven to rotate through the interaction of the electromagnet 6 and the magnet 52.
The end cover 21 is detachably connected, the center of the end cover 21 is connected with a feed pipe 7 through a bearing 22, and the feed pipe 7 penetrates through the end cover 21 and extends into the feed part 3.
The rotating rod 4 comprises a first rotating rod part 41 and a second rotating rod part 42 which are connected up and down, the outer diameter of the first rotating rod part 41 is larger than that of the second rotating rod part 42, and the second rotating rod part 42 is connected with the stirring blade 5 in a rolling mode through a circle of balls 43 embedded in the second rotating rod part 42.
The fixed cover in second bull stick portion 42 middle part is equipped with locating part 44, 5 middle parts of stirring leaf butt under first bull stick portion 41 between terminal surface and locating part 44, all seal through sealing washer 45 between stirring leaf 5 and first bull stick portion 41, between stirring leaf 5 and locating part 44.
Lower part one side of inner tube 2 is equipped with liquid outlet 23, 1 tip in the urceolus links firmly the play liquid pipe 9 of relative from top to bottom with liquid outlet 23, go out and slide in the liquid pipe 9 and inlay and be equipped with interior drain pipe 91, interior drain pipe 91 shifts up through the cylinder 92 drive and makes in the drain pipe 91 stretches into interior drain pipe 91 of liquid outlet 23 lower extreme.
Example 2
A method for reducing or removing pentachlorophenol in polyester and polyester blended fabrics comprises the following steps:
(1) preparing a working solution: first 25% o.w.f. Na2CO3Adding the special refining agent and distilled water into a material melting device in proportion for melting to obtain uniformly mixed pretreatment liquid, wherein the concentration of the special refining agent in the pretreatment liquid is 1.5g/L, then injecting the pretreatment liquid into a jet overflow dyeing machine, injecting distilled water according to the weight of treated textile fabrics until the bath ratio is 1:8, and then operating the machine for 5min to obtain working liquid;
(2) removing residual pentachlorophenol on the textile fabric: and (3) feeding the textile fabric with the pentachlorophenol exceeding the standard into a jet overflow dyeing machine, operating for 30min at the temperature of 40 ℃ according to the traditional dyeing process, then carrying out overflow water washing for 15min, and then carrying out fabric discharging and sizing to obtain a finished product.
In this example, the material melting device in example 1 was used to melt the material.
Example 3
A method for reducing or removing pentachlorophenol in polyester and polyester blended fabrics comprises the following steps:
(1) preparing a working solution: first 25% o.w.f. K2CO3Adding the special refining agent and distilled water into a material melting device in proportion for melting to obtain uniformly mixed pretreatment liquid, wherein the concentration of the special refining agent in the pretreatment liquid is 1.5g/L, then injecting the pretreatment liquid into a jet overflow dyeing machine, injecting distilled water according to the weight of treated textile fabrics until the bath ratio is 1:8, and then operating the machine for 5min to obtain working liquid;
(2) removing residual pentachlorophenol on the textile fabric: and (3) feeding the textile fabric with the pentachlorophenol exceeding the standard into a jet overflow dyeing machine, operating for 30min at the temperature of 40 ℃ according to the traditional dyeing process, then carrying out overflow water washing for 15min, and then carrying out fabric discharging and sizing to obtain a finished product.
In this example, the material melting device in example 1 was used to melt the material.
The method comprises the steps of taking a bright red polyester cotton knitted fabric, an orange polyester woven fabric, a brownish red polyester viscose knitted fabric and a date red polyester wool knitted fabric, respectively carrying out chlorophenol removal treatment according to the methods of examples 1-3, detecting the content of pentachlorophenol in different textile fabrics before and after treatment according to GB/T18414.2-2006 gas chromatography part 2 for determining chlorophenol in textiles, and testing the result as shown in Table 1.
Table 1:
the above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.