CN211734726U - Liquid caustic soda recovery system - Google Patents
Liquid caustic soda recovery system Download PDFInfo
- Publication number
- CN211734726U CN211734726U CN201921607515.2U CN201921607515U CN211734726U CN 211734726 U CN211734726 U CN 211734726U CN 201921607515 U CN201921607515 U CN 201921607515U CN 211734726 U CN211734726 U CN 211734726U
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- China
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- eluent
- textile
- reaction tank
- outlet end
- inlet end
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- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 title claims abstract description 89
- 239000007788 liquid Substances 0.000 title claims abstract description 38
- 235000011121 sodium hydroxide Nutrition 0.000 title claims abstract description 32
- 238000011084 recovery Methods 0.000 title claims abstract description 19
- 239000003480 eluent Substances 0.000 claims abstract description 47
- 238000006243 chemical reaction Methods 0.000 claims abstract description 41
- 239000004753 textile Substances 0.000 claims abstract description 32
- 230000007246 mechanism Effects 0.000 claims abstract description 30
- 239000003513 alkali Substances 0.000 claims abstract description 28
- 238000000108 ultra-filtration Methods 0.000 claims description 9
- 238000001223 reverse osmosis Methods 0.000 claims description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- 229910052799 carbon Inorganic materials 0.000 claims description 6
- 239000003518 caustics Substances 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 6
- 239000012528 membrane Substances 0.000 claims description 6
- 239000004576 sand Substances 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 4
- 238000005273 aeration Methods 0.000 claims description 3
- 239000003344 environmental pollutant Substances 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 3
- 231100000719 pollutant Toxicity 0.000 claims description 3
- 238000002203 pretreatment Methods 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 14
- 238000005406 washing Methods 0.000 abstract description 4
- 125000004122 cyclic group Chemical group 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 239000004744 fabric Substances 0.000 description 4
- 239000000835 fiber Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000010828 elution Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 229920003043 Cellulose fiber Polymers 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
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- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The utility model relates to a liquid caustic soda recovery system, include: the reaction tank, the inside of the said reaction tank forms the holding space of the eluant; the textile conveying mechanism is arranged above the reaction tank along the length direction, one part of the textile conveying mechanism is positioned above the liquid level of the eluent, the other part of the textile conveying mechanism is positioned below the liquid level of the eluent, and the two ends of the textile conveying mechanism respectively form a textile inlet end and a textile outlet end; the textile washing device comprises an eluent inlet end and an eluent outlet end, wherein the eluent inlet end is formed on the reaction tank corresponding to the textile outlet end, and the eluent outlet end is formed on the reaction tank corresponding to the textile inlet end. The utility model discloses can reduce the washing water, can retrieve alkali lye again and be used for reproduction, realize the cyclic utilization of material.
Description
Technical Field
The utility model relates to a liquid caustic soda recovery system especially relates to a be applied to liquid caustic soda recovery system among all kinds of fabrics caustic soda process.
Background
The textile needs an alkali-shrinking process in the production and processing processes, and aims to expand cotton fibers under the action of caustic soda, increase amorphous areas of cellulose fibers and arrange fiber molecules in order, so that the original twisting phenomenon of the fibers disappears, the fibers become straight, the cross sections of the fibers are changed from flat to round, and the technical performance, the service performance and the like of the textile can be improved.
After the caustic shrink process, several rounds of elution are required to reduce the caustic content of the product due to the large amount of liquid caustic in the textile. After the textile is twisted and washed for several times, although the liquid alkali on the surface can fall off partially, the liquid alkali cannot fall off completely. The lower the concentration of the liquid caustic soda is, the more the waste water is, and the discharged waste water contains the liquid caustic soda with lower concentration and higher total dissolved solids, which can only be discharged and cannot be recycled, thereby causing resource waste and greater environmental protection pressure.
SUMMERY OF THE UTILITY MODEL
To the lower problem of liquid caustic soda concentration in the above-mentioned fabrics, the utility model aims at providing a liquid caustic soda recovery system can reduce the washing water, can retrieve alkali lye again and be used for the reproduction, realizes the cyclic utilization of material.
In order to achieve the purpose, the utility model adopts the following technical proposal: a liquid caustic recovery system comprising: the reaction tank, the inside of the said reaction tank forms the holding space of the eluant; the textile conveying mechanism is arranged above the reaction tank along the length direction, one part of the textile conveying mechanism is positioned above the liquid level of the eluent, the other part of the textile conveying mechanism is positioned below the liquid level of the eluent, and the two ends of the textile conveying mechanism respectively form a textile inlet end and a textile outlet end; the textile washing device comprises an eluent inlet end and an eluent outlet end, wherein the eluent inlet end is formed on the reaction tank corresponding to the textile outlet end, and the eluent outlet end is formed on the reaction tank corresponding to the textile inlet end.
Preferably, the textile conveying mechanism is mainly composed of conveying rollers, the conveying rollers are arranged in a staggered manner along the length direction of the reaction tank, the conveying rollers in the upper row are positioned above the liquid level of the eluent, and the conveying rollers in the lower row are positioned below the liquid level of the eluent.
Preferably, the reaction tank is further provided with a plurality of baffles which are staggered and arranged at intervals up and down along the length direction of the reaction tank, the baffles in the upper row are respectively in one-to-one correspondence with the positions of the conveying rollers in the lower row, and the baffles in the lower row are respectively in one-to-one correspondence with the positions of the conveying rollers in the upper row.
The liquid caustic soda recovery system is preferably provided with a plurality of aeration pipes which are arranged at the bottom of the reaction tank in parallel at intervals along the length direction.
The liquid caustic soda recovery system, preferably, this liquid caustic soda recovery system still include with the concentrated mechanism of alkali that the reaction tank is connected, the concentrated mechanism of alkali includes: the inlet end of the carbon sand filter tank is connected with the outlet end of the eluent and is used for filtering impurities eluted from the alkali solution; the inlet end of the ultrafiltration system is connected with the outlet end of the carbon sand filter tank and is used for further intercepting solid pollutants in the alkali solution; a self-cleaning filter, the inlet end of which is connected with the outlet end of the ultrafiltration system, and is used for pretreatment to protect the ultrafiltration system; and the inlet end of the reverse osmosis membrane system is connected with the outlet end of the self-cleaning filter, and the outlet end of the reverse osmosis membrane system is connected with the eluent inlet end and is used for concentrating the alkali solution again.
The utility model discloses owing to take above technical scheme, it has following advantage: 1. the utility model discloses need not to use a large amount of sparge water, the caustic soda in the fabrics just can obtain effective elution, and system structure is simple, and area is less, and the operation is convenient easy going, water economy resource. 2. The utility model discloses can make the caustic soda liquid in the fabrics even also can elute and concentrate under lower concentration, the lye does not have the waste, does not have the emission, handles to finish can put in again and go into production, can the environmental protection, again can resources are saved, has realized cleaner production. 3. The utility model discloses can retrieve liquid caustic soda under the normal atmospheric temperature condition, compare traditional alkali recovery unit, energy consumption and cost greatly reduced, economic benefits is high.
Drawings
FIG. 1 is a schematic structural view of a liquid caustic soda recovery system of the present invention;
FIG. 2 is a schematic view of the structure of the alkali lye concentrating mechanism of the present invention.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the objects, features and advantages of the invention can be more clearly understood. It should be understood that the embodiments shown in the drawings are not intended as limitations on the scope of the invention, but are merely illustrative of the true spirit of the technical solution of the invention.
As shown in fig. 1, the present embodiment provides a liquid caustic recycling system from a towel manufacturing process, comprising: a reaction tank 1, wherein an eluent accommodating space is formed inside the reaction tank 1; the towel conveying mechanism 3 is arranged above the reaction tank 1 along the length direction, one part of the towel conveying mechanism 3 is positioned above the liquid level of the eluent, the other part of the towel conveying mechanism 3 is positioned below the liquid level of the eluent, and a towel inlet end 5 and a towel outlet end 6 are respectively formed at two ends of the towel conveying mechanism 3; an eluent inlet end 7 and an eluent outlet end 8, wherein the eluent inlet end 7 is formed on the reaction tank 1 corresponding to the towel outlet end 6, and the eluent outlet end 8 is formed on the reaction tank 1 corresponding to the towel inlet end 5. Therefore, the towel enters the eluent from the towel inlet end 5 under the rotation of the towel conveying mechanism 3, the alkali solute in the towel is continuously transferred into the eluent, the eluent leaves the eluent from the towel outlet end 6 after the solute is transferred for multiple times, the alkali content in the towel is reduced to be very low, and the eluent with high liquid alkali concentration is obtained and leaves the reaction tank 1 from the eluent outlet end 8.
In the above embodiment, it is preferable that the towel transfer mechanism 3 is mainly composed of the transfer rollers 31, a plurality of the transfer rollers 31 are arranged in the longitudinal direction of the reaction tank 1 in a staggered manner in the up-down direction, and the upper row of the transfer rollers 31 is located above the liquid level of the eluent, and the lower row of the transfer rollers 31 is located below the liquid level of the eluent.
In the above embodiment, it is preferable that the reaction tank 1 is further provided with a plurality of baffle plates 4 arranged in the length direction of the reaction tank 1 in a staggered manner, and the baffle plates 4 in the upper row correspond to the conveying rollers 31 in the lower row in a one-to-one manner, and the baffle plates 4 in the lower row correspond to the conveying rollers 31 in the upper row in a one-to-one manner, so that the baffle plates 4 cause a plug flow effect of the eluent, and a concentration difference exists in each region between the adjacent baffle plates 4, thereby increasing the reaction level.
In the above embodiment, it is preferable that a plurality of aeration tubes 2 are arranged at the bottom of the reaction tank 1 at intervals in the longitudinal direction for promoting the transfer of the alkali solute in the towel under the eluent to the eluent.
In the above embodiment, preferably, the liquid caustic soda recovery system of the present invention further includes a lye concentration mechanism connected to the reaction tank 1, wherein the lye concentration mechanism includes: the inlet end of the carbon sand filter tank 9 is connected with the eluent outlet end 8 and is used for filtering out impurities such as cellulose eluted from the alkali solution; the inlet end of the ultrafiltration system 10 is connected with the outlet end of the carbon sand filter tank 9 and is used for further intercepting solid pollutants in the alkali solution; a self-cleaning filter 11, the inlet end of which is connected to the outlet end of the ultrafiltration system 10, for pretreatment to protect the ultrafiltration system 10; and the inlet end of the reverse osmosis membrane system 12 is connected with the outlet end of the self-cleaning filter 11, the outlet end of the reverse osmosis membrane system is connected with the eluent inlet end 7 and is used for concentrating the alkali solution again, the generated reverse osmosis concentrated water can be directly used in the towel alkali condensation process, and the generated regenerated water can be used as eluent to be introduced into the reaction tank 1 again, so that the water resource is saved, and the recovery of the alkali solution and the regenerated water is realized.
The utility model discloses when using, its working process as follows:
1) placing a towel which is mechanically twisted and pressed and has lower alkali concentration into a towel inlet end 5 of a towel conveying mechanism 3;
2) introducing pure water into the reaction tank 1, starting the towel conveying mechanism 3 after the lower row of conveying rollers 31 is immersed by the pure water, allowing the towel to enter the pure water from the towel inlet end 5 under the rotation of the towel conveying mechanism 3, and dissolving the alkali solution in the towel in the pure water by driving and extruding through the conveying rollers 31;
3) meanwhile, the pure water introduced in the reverse direction presents a concentration gradient in the reaction tank 1, and the alkali solute in the towel is continuously transferred into the pure water through the mass transfer function of the solute;
4) after the solute is transferred for many times, the towel leaves the reaction tank 1 through the towel outlet end 6, the eluted towel is obtained at the towel outlet end 6, the high-concentration alkali solution is obtained at the towel inlet end 5, and the alkali solution is collected at the eluent outlet end 8 for further recycling.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the same, and those skilled in the art should understand that they can still make modifications or equivalent substitutions on the technical solutions of the present invention, but these modifications or equivalent substitutions can not depart from the spirit and scope of the technical solutions of the present invention.
Claims (5)
1. A liquid caustic recovery system, comprising:
the device comprises a reaction tank (1), wherein an accommodating space for eluent is formed inside the reaction tank (1);
the textile conveying mechanism (3) is arranged above the reaction tank (1) along the length direction, one part of the textile conveying mechanism (3) is positioned above the liquid level of the eluent, the other part of the textile conveying mechanism is positioned below the liquid level of the eluent, and two ends of the textile conveying mechanism (3) are respectively provided with a textile inlet end (5) and a textile outlet end (6);
an eluent inlet end (7) and an eluent outlet end (8), wherein the eluent inlet end (7) is formed on the reaction tank (1) corresponding to the textile outlet end (6), and the eluent outlet end (8) is formed on the reaction tank (1) corresponding to the textile inlet end (5).
2. The caustic soda lye recovery system according to claim 1 wherein the textile delivery mechanism (3) consists essentially of a plurality of delivery rollers (31), a plurality of said delivery rollers (31) being staggered up and down along the length of the reaction tank (1) with the upper row of said delivery rollers (31) being above the level of the effluent and the lower row of said delivery rollers (31) being below the level of the effluent.
3. The caustic soda liquid recovery system according to claim 2, wherein the reaction tank (1) is further provided with a plurality of baffle plates (4) which are staggered and arranged up and down along the length direction of the reaction tank (1), the baffle plates (4) at the upper row correspond to the conveying rollers (31) at the lower row one by one respectively, and the baffle plates (4) at the lower row correspond to the conveying rollers (31) at the upper row one by one respectively.
4. The caustic soda liquid recovery system according to claim 1, wherein a plurality of aeration pipes (2) are arranged at the bottom of the reaction tank (1) along the length direction in parallel and at intervals.
5. The caustic soda liquid recovery system according to claim 1, further comprising a caustic soda concentrating mechanism connected to said reaction tank (1), said caustic soda concentrating mechanism comprising:
the inlet end of the carbon sand filter tank (9) is connected with the outlet end (8) of the eluent and is used for filtering impurities eluted from the alkali solution;
the inlet end of the ultrafiltration system (10) is connected with the outlet end of the carbon sand filter tank (9) and is used for further intercepting solid pollutants in the alkali solution;
a self-cleaning filter (11) having an inlet end connected to the outlet end of the ultrafiltration system (10) for pre-treatment to protect the ultrafiltration system (10);
and the inlet end of the reverse osmosis membrane system (12) is connected with the outlet end of the self-cleaning filter (11), and the outlet end of the reverse osmosis membrane system is connected with the eluent inlet end (7) and used for concentrating the alkali solution again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921607515.2U CN211734726U (en) | 2019-09-25 | 2019-09-25 | Liquid caustic soda recovery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921607515.2U CN211734726U (en) | 2019-09-25 | 2019-09-25 | Liquid caustic soda recovery system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211734726U true CN211734726U (en) | 2020-10-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921607515.2U Active CN211734726U (en) | 2019-09-25 | 2019-09-25 | Liquid caustic soda recovery system |
Country Status (1)
| Country | Link |
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| CN (1) | CN211734726U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110699886A (en) * | 2019-09-25 | 2020-01-17 | 河北蓝荷水务有限公司 | Liquid caustic soda recovery system and method |
-
2019
- 2019-09-25 CN CN201921607515.2U patent/CN211734726U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110699886A (en) * | 2019-09-25 | 2020-01-17 | 河北蓝荷水务有限公司 | Liquid caustic soda recovery system and method |
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