CN209923105U - Device for pretreating acrylic fiber wastewater - Google Patents
Device for pretreating acrylic fiber wastewater Download PDFInfo
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- CN209923105U CN209923105U CN201920354472.5U CN201920354472U CN209923105U CN 209923105 U CN209923105 U CN 209923105U CN 201920354472 U CN201920354472 U CN 201920354472U CN 209923105 U CN209923105 U CN 209923105U
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Abstract
The utility model provides a device for acrylic fibres waste water preliminary treatment. The device is inside from bottom to top in proper order for mixed region, catalytic oxidation reaction district and membrane disengagement zone, the bottom in mixed region is provided with the water distributor, and is provided with the water inlet on its outer wall, the water distributor passes through the water inlet is connected with two at least medicine pipelines that add, install a plurality of ultraviolet light sources in the catalytic oxidation reaction district, and it has the catalyst of suspension state to fill, be provided with the microfiltration membrane in the membrane disengagement zone, just be provided with the delivery port on the microfiltration membrane. The device simple structure, ultraviolet source and suspended catalyst's synergism have greatly improved oxidation efficiency, simultaneously because there are a large amount of filiform porous structures in the catalyst, can effectively adsorb difficult biodegradable's acrylonitrile oligomer in the acrylic fibres waste water, no mud produces to the technical problem that the structure that exists when having solved among the prior art device and being used for acrylic fibres waste water treatment is complicated and have mud to produce.
Description
Technical Field
The utility model relates to an industrial wastewater treatment technical field especially relates to a device for acrylic fibres waste water preliminary treatment.
Background
The acrylic fiber wastewater has high organic matter concentration and complex components, contains high-toxicity substances such as nitrile, dimethylformamide and the like, and also contains difficult-to-biodegrade substances such as acrylonitrile oligomers with different polymerization degrees, so that the biodegradability of the wastewater is poor, and the standard discharge is difficult to realize by single biochemical treatment. Therefore, the wastewater needs to be pretreated by a physical and chemical method, so that the biodegradability of the wastewater is improved, and conditions are created for subsequent biochemical treatment. At present, the pretreatment methods which are researched and applied more at home and abroad comprise coagulation, adsorption, iron-carbon internal electrolysis, ozone oxidation, Fenton oxidation and the like. Among these methods, the Fenton oxidation method has the best effect of removing the substances which are difficult to degrade and poison in the acrylic fiber wastewater. In the traditional Fenton oxidation process, hydrogen peroxide and ferrous salt are added, acrylic fiber wastewater needs to be adjusted to be acidic (pH is 3.0), a large amount of divalent ferrous salt is added to serve as a catalyst, and ferrous ions catalyze the hydrogen peroxide to be decomposed under the acidic condition to generate hydroxyl radicals (HO & gt) with strong oxidizing property to oxidize and decompose organic pollutants. However, after the reaction in the conventional process is finished, ferrous salt is converted into trivalent ferric salt, which cannot be reused, and a large amount of iron mud is generated, thereby further increasing the treatment cost.
In recent years, a few new fenton-like processing technologies have appeared, which are based on traditional fenton reagents and can prepare similar fenton-like reagents by changing and coupling reaction conditions and appropriately fine-tuning the reaction mechanism. The subsequent combination of optics, electrochemistry, microbiological technology, ozone technology, nanotechnology and ultrasonic technology can form a set of novel improved Fenton-like system which is efficient, low in sludge amount, low in cost, wide in pH value and superior to the traditional Fenton process. For example, a Fenton-like oxidation filter tank for degrading industrial wastewater appears in the prior art, and the technical principle is that hydrogen peroxide and sulfuric acid are added into a reaction zone, HO is generated under the synergistic action of a coconut shell particle activated carbon catalyst layer and an ultrasonic probe, so that organic matters which are difficult to degrade in the wastewater are decomposed, and the advantages of small occupied area, small dosage, high oxidation efficiency and good decolorization effect are realized. However, the technology still generates sludge, and the structure is complicated.
In conclusion, it is necessary to develop a device which can be used for pretreating acrylic fiber wastewater, does not generate sludge and has a simple structure.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a device for acrylic fibres waste water preliminary treatment, the device simple structure, install ultraviolet source in its catalytic oxidation reaction zone, and it has the catalyst of suspension state to fill, oxidation efficiency has been improved, simultaneously because there is a large amount of filiform porous structures in the catalyst, can effectively adsorb the acrylonitrile oligomer of difficult biodegradable in the acrylic fibres waste water, and do not have mud and produce, green to solve the technical problem that the structure that exists is complicated and have mud to produce when the device is used for acrylic fibres waste water treatment among the prior art.
In order to realize the aim, the utility model provides a device for acrylic fibres waste water preliminary treatment.
This a device for acrylic fibres waste water preliminary treatment is inside from bottom to top in proper order for mixed region, catalytic oxidation reaction zone and membrane disengagement zone, wherein, the bottom in mixed region is provided with the water distributor, and is provided with the water inlet on its outer wall, the water distributor passes through the water inlet is connected with two at least medicine pipelines that add, install a plurality of ultraviolet light sources in the catalytic oxidation reaction zone, and it has the catalyst of suspension state to fill, be provided with the microfiltration membrane in the membrane disengagement zone, just be provided with the delivery port on the microfiltration membrane.
Further, a screen is arranged at the bottom of the membrane separation area, and the screen separates the membrane separation area from the catalytic oxidation reaction area.
Further, the mesh diameter of the screen is 2 mm.
Furthermore, two dosing pipelines are arranged, wherein one dosing pipeline is a hydrogen peroxide dosing pipeline which is connected with the water inlet through a hydrogen peroxide dosing pump; the other is an iron chloride dosing pipeline which is connected with the water inlet through an iron chloride dosing pump.
Furthermore, the device also comprises a wastewater inlet pipe and a water outlet pipe, wherein the wastewater inlet pipe is connected with the water inlet through a water inlet pump, and the water outlet pipe is connected with the micro-filtration membrane through the water outlet.
Further, the device still includes the back flow, be provided with the backward flow mouth on the membrane separation zone outer wall, back flow one end is passed through the backward flow mouth is connected the membrane separation zone, and the other end passes through the backwash pump and connects the iron chloride adds the medicine pipeline.
Furthermore, the device also comprises a backwashing system, wherein the backwashing system comprises a backwashing water inlet pipeline and an emptying valve arranged on the outer wall of the mixing area, and the water outlet pipe is used as the backwashing water inlet pipeline.
Furthermore, the device is of a cylindrical structure, the height-diameter ratio is 2.5:1, and the height ratio of the mixing zone, the catalytic oxidation reaction zone and the membrane separation zone is 1:3.5: 2.
Furthermore, the outer wall of the catalytic oxidation reaction zone is provided with an access hole.
Further, the plurality of ultraviolet light sources are arranged in a layered manner along the axial direction; the ultraviolet light source is an ultraviolet lamp, the power of the ultraviolet lamp is 15W, the maximum luminous peak wavelength is 254nm, and the light intensity is 0.8 multiplied by 10-5Einstein·L-1·s-1。
Furthermore, the catalyst is a Fenton-like catalyst formed by crushing mushroom culture medium waste into powder with the particle size of 0.5mm and then roasting the powder with molybdenum disulfide and cobalt oxide according to a certain proportion at 150 ℃.
The utility model discloses in, the device adopts mushroom culture medium waste material after the modification as the catalyst, through its reduction and combine the ultraviolet ray, makes the reduction of trivalent molysite for bivalent molysite in the reaction process to oxidation efficiency has been improved. Meanwhile, as a large amount of filamentous porous structures exist in the modified mushroom culture medium waste, acrylonitrile oligomers which are difficult to biodegrade in the acrylic fiber wastewater can be effectively adsorbed. The device does not need to adjust the pH value of the wastewater in the operation process, cheap trivalent ferric salt can be used for replacing bivalent ferric salt, the using amount is reduced by 80-90%, and no sludge is generated. Compared with the traditional homogeneous Fenton process, the device has better pretreatment effect on acrylic fiber wastewater, the COD removal rate can be improved by 15-20%, meanwhile, the biodegradability of the wastewater is improved, and the requirement of subsequent biochemical treatment can be met, so that the technical problems that the structure is complex and sludge is generated when the device is used for acrylic fiber wastewater treatment in the prior art are solved.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1 is a schematic structural view of a device for acrylic fiber wastewater treatment in the present invention.
In the figure:
1. a mixing zone; 2. a catalytic oxidation reaction zone; 3. a membrane separation zone; 4. a water distribution pipe; 5. an ultraviolet light source; 6. a microfiltration membrane; 7. screening a screen; 8. a wastewater inlet pipe; 9. a water outlet pipe; 10. a return pipe; 11. a hydrogen peroxide dosing pipeline; 12. a ferric chloride dosing pipeline; 13. an atmospheric valve; 14. an access hole; 15. a water inlet pump; 16. a reflux pump; 17. a hydrogen peroxide dosing pump; 18. Ferric chloride dosing pump.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
The utility model discloses a device for acrylic fibres waste water preliminary treatment, as shown in figure 1, the device is inside from bottom to top in proper order for mixed region 1, catalytic oxidation reaction zone 2 and membrane separation zone 3, wherein, the bottom of mixed region 1 is provided with water distributor 4, and be provided with the water inlet on its outer wall, water distributor 4 is connected with two at least medicine pipelines through the water inlet, install a plurality of ultraviolet light source 5 in the catalytic oxidation reaction zone 2, and it has the catalyst of suspension state to fill, be provided with microfiltration membrane 6 in the membrane separation zone 3, and be provided with the delivery port on the microfiltration membrane 6.
In the above embodiment, the mixing zone 1, the catalytic oxidation reaction zone 2 and the membrane separation zone 3, which are sequentially arranged from bottom to top, form an internal structure of the device for pretreating acrylic fiber wastewater, the structure is simple, the bottom of the mixing zone 1 is provided with the water distribution pipe 4, the outer wall of the mixing zone is provided with the water inlet, the water distribution pipe 4 is connected with at least two medicine adding pipelines through the water inlet, namely, the medicine liquid added into the device enters the mixing zone 1 through the water distribution pipe 4, and the acrylic fiber wastewater also enters the mixing zone 1 through the water inlet, so that the medicine liquid and the wastewater both enter the mixing zone 1 through the water distribution pipe 4, the catalytic oxidation reaction zone 2 is internally provided with the plurality of ultraviolet light sources 5 and is filled with the suspended catalyst, the medicine liquid and the acrylic fiber wastewater enter the catalytic oxidation reaction zone 2 through the mixing zone 1 from bottom to top, and the suspended catalyst reacts, the method is characterized in that toxic and harmful organic matters in the acrylic fiber wastewater are degraded, meanwhile, the suspended catalyst can adsorb acrylonitrile oligomers which are difficult to degrade in the acrylic fiber wastewater, the acrylic fiber wastewater has a good pretreatment effect, the treated acrylic fiber wastewater upwards enters a membrane separation area 3, a microfiltration membrane 6 is arranged in the membrane separation area, a water outlet is formed in the microfiltration membrane 6, and then the treated acrylic fiber wastewater passes through a water outlet discharge device. In the whole treatment process of the device, no sludge is generated, the device has a good pretreatment effect, the COD removal rate can be improved by 15-20%, meanwhile, the biodegradability of the wastewater is improved, and the requirement of subsequent biochemical treatment can be met.
In a preferred embodiment, the bottom of the membrane separation zone 3 is provided with a screen 7, and the screen 7 separates the membrane separation zone 3 from the catalytic oxidation reaction zone 2.
Preferably, the mesh diameter of the screen 7 is 2 mm.
The catalytic oxidation reaction zone 2 and the membrane separation zone 3 are separated by a screen 7, the aperture of the mesh of the screen 7 is preferably 2mm, the retention time of the catalyst in the catalytic oxidation reaction zone 2 is increased by the blocking effect, the concentration of the catalyst in the membrane separation zone 3 can be reduced, and the membrane blocking frequency is reduced.
As a preferred embodiment, two dosing pipelines are provided, wherein one dosing pipeline is a hydrogen peroxide dosing pipeline 11, and the hydrogen peroxide dosing pipeline 11 is connected with the water inlet through a hydrogen peroxide dosing pump 17; the other is an iron chloride dosing pipeline 12, and the iron chloride dosing pipeline 12 is connected with a water inlet through an iron chloride dosing pump 18. Two medicine adding pipelines, namely a hydrogen peroxide medicine adding pipeline 11 and a ferric chloride medicine adding pipeline 12, are arranged outside the mixing area 1 of the embodiment, medicine liquid is respectively added into the mixing area 1 through a hydrogen peroxide medicine adding pump 17 and a ferric chloride medicine adding pump 18, 30% of hydrogen peroxide solution is added into the device, and the flow ratio of acrylic fiber waste water to the hydrogen peroxide solution is 100: 1; adding 20g/L ferric chloride solution into the device, wherein the flow ratio of the acrylic fiber wastewater to the ferric chloride solution is 50: 1.
Furthermore, the device also comprises a wastewater inlet pipe 8 and a water outlet pipe 9, wherein the wastewater inlet pipe 8 is connected with the water inlet through a water inlet pump 15, and the water outlet pipe 9 is connected with the micro-filtration membrane 6 through a water outlet. Waste water inlet pipe 8 is used for the transport of acrylic fibres waste water, and waste water inlet pipe 8 passes through intake pump 15 and connects the water inlet that 1 outer wall of mixing zone set up, and then connects the water distributor 4 that 1 bottom of mixing zone set up to carry acrylic fibres waste water to mixing zone 1 inside, later through the acrylic fibres waste water entering membrane separation zone 3's of catalytic oxidation treatment microfiltration membrane 6, through outlet pipe 9 eduction gear, the completion is to the preliminary treatment of acrylic fibres waste water afterwards.
Furthermore, the device also comprises a return pipe 10, the outer wall of the membrane separation area 3 is provided with a return port, one end of the return pipe 10 is connected with the membrane separation area 3 through the return port, and the other end is connected with the ferric chloride dosing pipeline 12 through a return pump 16. In order to achieve a better pretreatment effect, the device is provided with a return pipe 10, a return system is formed, a return port is arranged on the outer wall of the membrane separation area 3, one end of the return pipe 10 is connected with the membrane separation area 3 through the return port, the other end of the return pipe is connected with a ferric chloride dosing pipeline 12 through a return pump 16, as can also be seen from fig. 1, one end of the return pipe 10 is directly connected with the ferric chloride dosing pipeline 12 through the return pump 16, the pipeline layout design is more reasonable, after the return pump 16 is started, part of mixed liquid in the membrane separation area 3 flows through the return pipe 10 and the ferric chloride dosing pipeline 12 to enter the water distribution pipe 4, so that the mixed liquid flows back to the inside of the mixing area 1, the next pretreatment is carried out, the inside of the catalytic oxidation area 2 is in a fluidized state, the oxidation efficiency is favorably improved.
Further, the above apparatus further comprises a backwashing system including a backwashing water inlet pipe and a blow-down valve 13 provided on an outer wall of the mixing zone 1, wherein the water outlet pipe 9 serves as a backwashing water inlet pipe. When the water outlet flow of the Fenton-like device is lower than a target range value, the microfiltration membrane 6 automatically starts a backwashing program, the backwashing period is once every 6-7 days, the water outlet pipe 9 forms a backwashing water inlet pipeline, backwashing water enters from the water outlet pipe 9 in a pulse state, and backwashing wastewater is discharged from an emptying valve 13 arranged on the outer wall of the mixing area 1. Because the water outlet pipe 9 has the functions of discharging pretreated acrylic fiber wastewater and inputting backwash water for the device, the arrangement of a backwash water inlet pipeline is omitted, and the structure is simpler.
Furthermore, the outer wall of the catalytic oxidation reaction zone 2 is provided with an access hole 14, and the access hole 14 is convenient for regular maintenance of the ultraviolet lamp.
Preferably, the plurality of ultraviolet light sources 5 are arranged in layers along the axial direction. The ultraviolet light sources 5 distributed in a layered manner can ensure that the ultraviolet light is utilized to the maximum in the whole catalytic oxidation reaction zone 2, and the utilization rate of the ultraviolet light reaches the best, so that the catalytic oxidation reaction efficiency is improved.
Preferably, the ultraviolet light source 5 is an ultraviolet lamp with a power of 15W, a maximum light emission peak wavelength of 254nm and a light intensity of 0.8 × 10-5Einstein·L-1·s-1。
Preferably, the catalyst is a Fenton-like catalyst formed by crushing mushroom culture medium waste into powder with the particle size of 0.5mm and then roasting the powder with molybdenum disulfide and cobalt oxide according to a certain proportion at 150 ℃. The catalyst of the embodiment is obtained by crushing mushroom culture medium waste into powder with the particle size of 0.5mm, and then roasting the powder with molybdenum disulfide and cobalt oxide at 150 ℃, wherein the catalyst flows in a suspended state in a device, the average concentration of the mixed liquid of the catalyst in the device is 5g/L, and the replacement period of the catalyst is 2-3 months.
Preferably, the device is in a cylindrical structure, the height-diameter ratio is 2.5:1, and the height ratio of the mixing zone 1, the catalytic oxidation reaction zone 2 and the membrane separation zone 3 is 1:3.5: 2. According to the device with the cylindrical structure with the height-diameter ratio of 2.5:1, the height ratio of the mixing zone 1, the catalytic oxidation reaction zone 2 and the membrane separation zone 3 is designed to be 1:3.5:2, the hydraulic retention time is 0.8-1.2h, the device has the advantages of small floor area and high space utilization rate, and the degradation efficiency of organic matters in the acrylic fiber wastewater can be integrally improved.
The acrylic fiber waste water of this embodiment is from bottom to top by mixing zone 1 entering catalytic oxidation reaction zone 2 of installing the ultraviolet lamp, mushroom culture medium waste material after the modification is the catalyst, make the trivalent molysite reduce to bivalent molysite through the reduction under the ultraviolet ray is assisted, decompose hydrogen peroxide solution and produce the hydroxyl free radical, poisonous harmful organic matter in the degradation acrylic fiber waste water, and simultaneously, because there is a large amount of filiform porous structures in the mushroom culture medium waste material after the modification, can effectively adsorb difficult degradation acrylonitrile oligomer in the acrylic fiber waste water, there is fine preliminary treatment effect to the acrylic fiber waste water. Need not to adjust waste water pH value in the above-mentioned device processing procedure, can use cheap trivalent molysite to replace bivalent molysite, the quantity reduces 80-90%, and does not have mud and produce, and is better to the preliminary treatment effect of acrylic fibre waste water than traditional homogeneous phase fenton technology, and COD clearance can improve 15-20%, and waste water biodegradability improves simultaneously, can satisfy follow-up biochemical treatment's needs.
The utility model discloses a work flow, including following step:
(1) opening a valve of the wastewater inlet pipe 8, starting the water inlet pump 15, and injecting acrylic fiber wastewater into the water distribution pipe 4 through the wastewater inlet pipe 8 to realize uniform and stable water inlet;
(2) opening a valve of a hydrogen peroxide dosing pipeline 11, starting a hydrogen peroxide dosing pump 17, feeding a hydrogen peroxide solution into the water distribution pipe 4 through the hydrogen peroxide dosing pipeline 11, and allowing the hydrogen peroxide solution to enter a mixing zone 1 through the water distribution pipe 4 to be fully mixed with the acrylic fiber wastewater;
(3) opening a valve of the ferric chloride dosing pipeline 12, starting the ferric chloride dosing pump 18, dosing a ferric chloride solution into the water distribution pipe 4 through the ferric chloride dosing pipeline 12, and allowing the ferric chloride solution to enter the mixing region 1 through the water distribution pipe 4 to be fully mixed with the acrylic fiber wastewater and the hydrogen peroxide solution;
(4) the mixed solution of the acrylic fiber wastewater, the hydrogen peroxide solution and the ferric chloride solution enters a catalytic oxidation reaction zone 2 provided with an ultraviolet lamp from the mixing zone 1 from bottom to top, a catalyst reduces trivalent ferric salt into divalent ferric salt through reduction under the assistance of ultraviolet light, hydrogen peroxide is decomposed to generate hydroxyl radicals, toxic and harmful organic matters in the acrylic fiber wastewater are degraded, meanwhile, the catalyst adsorbs nondegradable acrylonitrile oligomer in the acrylic fiber wastewater, and the acrylic fiber wastewater has a good pretreatment effect;
(5) the pretreated acrylic fiber wastewater upwards enters the microfiltration membrane 6 of the membrane separation area 3 and then is discharged out of the treatment device through a water outlet pipe 9;
(6) the valve of the return pipe 10 is opened, the return pump 16 is started, and part of the mixed liquid in the membrane separation zone 3 flows back again to enter the mixing zone 1 of the treatment device through the return pipe 10 and the ferric chloride dosing pipeline 12, wherein the reflux ratio is 30-50%.
In the embodiment, when the water outlet flow of the device is lower than a target range value, the microfiltration membrane 6 automatically starts a backwashing program, the backwashing period is once for 6-7 days, and backwashing inlet water enters from the water outlet pipe 9 in a pulse state and is discharged from the emptying valve 13 arranged on the outer wall of the mixing area 1 at the bottom of the device.
After the acrylic fiber wastewater is pretreated by the device, the COD removal rate is more than 60 percent, and the BOD5The COD is more than 0.3, and the pretreated effluent can reach the first-grade discharge standard of the petrochemical industry after being treated by a subsequent conventional biochemical process.
The outer wall and the screen 7 of the device are both made of corrosion-resistant polyethylene materials, and the wastewater inlet pipe 8, the water distribution pipe 4, the hydrogen peroxide dosing pipeline 11, the ferric chloride dosing pipeline 12, the return pipe 10 and the water outlet pipe 9 are all polyvinyl chloride pipes.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The utility model provides a device for acrylic fibre waste water preliminary treatment, its characterized in that, inside mixing zone (1), catalytic oxidation reaction zone (2) and the membrane disengagement zone (3) of being in proper order from bottom to top of device, wherein, the bottom of mixing zone (1) is provided with water distributor (4), and is provided with the water inlet on its outer wall, water distributor (4) pass through the water inlet is connected with two at least medicine pipelines that add, install a plurality of ultraviolet source (5) in catalytic oxidation reaction zone (2), and it has the catalyst of suspension state to fill, be provided with microfiltration membrane (6) in the membrane disengagement zone (3), just be provided with the delivery port on microfiltration membrane (6).
2. The device for pretreating acrylic fiber wastewater according to claim 1, wherein a screen (7) is arranged at the bottom of the membrane separation zone (3), and the screen (7) separates the membrane separation zone (3) from the catalytic oxidation reaction zone (2).
3. The apparatus for the pretreatment of acrylic fiber wastewater as set forth in claim 2, wherein the mesh diameter of the screen (7) is 2 mm.
4. The device for pretreating acrylic fiber wastewater as claimed in claim 1, wherein the number of the medicine adding pipelines is two, one of the medicine adding pipelines is a hydrogen peroxide medicine adding pipeline (11), and the hydrogen peroxide medicine adding pipeline (11) is connected with the water inlet through a hydrogen peroxide medicine adding pump (17); the other is an iron chloride dosing pipeline (12), and the iron chloride dosing pipeline (12) is connected with the water inlet through an iron chloride dosing pump (18).
5. The device for pretreating acrylic fiber wastewater as claimed in claim 1, further comprising a wastewater inlet pipe (8) and a wastewater outlet pipe (9), wherein the wastewater inlet pipe (8) is connected with the water inlet through a water inlet pump, and the water outlet pipe (9) is connected with the microfiltration membrane (6) through the water outlet.
6. The device for pretreating acrylic fiber wastewater according to claim 4, further comprising a return pipe (10), wherein a return port is arranged on the outer wall of the membrane separation region (3), one end of the return pipe (10) is connected with the membrane separation region (3) through the return port, and the other end of the return pipe is connected with the ferric chloride dosing pipeline (12) through a return pump (16).
7. The device for the pretreatment of acrylic fiber wastewater as claimed in claim 5, characterized in that the device further comprises a backwashing system comprising a backwashing water inlet pipe and a vent valve (13) disposed on the outer wall of the mixing zone (1), wherein the water outlet pipe (9) serves as the backwashing water inlet pipe.
8. The device for pretreating acrylic fiber wastewater according to claim 1, wherein the device is of a cylindrical structure, the height-diameter ratio is 2.5:1, and the height ratio of the mixing zone (1), the catalytic oxidation reaction zone (2) and the membrane separation zone (3) is 1:3.5: 2.
9. The device for pretreating acrylic fiber wastewater as claimed in claim 8, wherein the plurality of ultraviolet light sources (5) are arranged in layers along the axial direction; the ultraviolet light source (5) is an ultraviolet lamp, the power of the ultraviolet lamp is 15W, the maximum luminous peak wavelength is 254nm, and the light intensity is 0.8 multiplied by 10-5Einstein·L-1·s-1。
10. The device for pretreating acrylic fiber wastewater as claimed in claim 1, wherein the outer wall of the catalytic oxidation reaction zone (2) is provided with a manhole (14).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920354472.5U CN209923105U (en) | 2019-03-19 | 2019-03-19 | Device for pretreating acrylic fiber wastewater |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920354472.5U CN209923105U (en) | 2019-03-19 | 2019-03-19 | Device for pretreating acrylic fiber wastewater |
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