CN216890480U - System for recycling sewage generated in medium-pressure washing line in viscose filament yarn production - Google Patents
System for recycling sewage generated in medium-pressure washing line in viscose filament yarn production Download PDFInfo
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- CN216890480U CN216890480U CN202123374351.3U CN202123374351U CN216890480U CN 216890480 U CN216890480 U CN 216890480U CN 202123374351 U CN202123374351 U CN 202123374351U CN 216890480 U CN216890480 U CN 216890480U
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Abstract
The utility model discloses a recycling system for sewage of a medium-pressure washing line in viscose filament yarn production, and belongs to the technical field of viscose fiber production equipment. The device comprises a heat exchange device, a mixing device, a sedimentation tank, a full-automatic backwashing filter and an ultrafiltration membrane device, wherein the heat exchange device is connected with a pressure washing line, the heat exchange device is connected with the mixing device, and the mixing device is connected with a pre-spinning process through a deacidification water pipe; the mixing device is connected with the sedimentation tank, the sedimentation tank is connected with the full-automatic backwashing filter, the full-automatic backwashing filter is connected with the ultrafiltration membrane device, the ultrafiltration membrane device is connected with the water production tank, and the water production tank is connected with the pressure washing line through the recycling pipe to form a passage for recycling sewage of the pressure washing line. The sewage of the pressure washing line is orderly and effectively treated, and then the obtained purified water is reused for the pressure washing line or other production lines, so that the resource is saved, and the environment is protected.
Description
Technical Field
The utility model relates to a sewage circulating treatment system, in particular to a circulating treatment and recycling system for sewage of a press washing line in viscose filament yarn production, and belongs to the technical field of viscose fiber production equipment.
Background
The viscose fiber is one of artificial fibers, the main raw material of the viscose fiber is natural cellulose (including cotton pulp and wood pulp), the cellulose is separated and regenerated through chemical reaction, and the domestic raw material is mainly wood pulp. Viscose fibers have good hygroscopicity, are easy to dye, are not easy to generate static electricity, have good spinnability, and are widely applied to the fields of various textiles, clothing and the like.
The pressure washing line (i.e. the pressure washing production line of the viscose filament yarn cakes) is used for carrying out post-treatment on the viscose filament yarn cakes spun by a spinning machine, and comprises the working procedures of desulfurization, bleaching, oiling and the like so as to remove impurities on strand silk, perfect the structure of the filament, improve the appearance of the filament, improve the physical and mechanical performance indexes of the filament, and finally, dewater the treated filament cakes, and send the filament cakes to a dryer for drying, spooling and packaging through a belt conveyor and a loading machine. During the post-treatment of the spinning cake, a large amount of pressure washing line sewage (containing impurity particles with different particle sizes, colloid, insoluble fine substances and the like) is generated. At present, the pressure washing line sewage is generally directly sent to an environmental protection part for treatment and then discharged, which causes large soft water consumption and high environmental protection treatment cost.
Although the refining pressure washing wastewater is purified in the industry and then is recycled to finally achieve the aim of secondary utilization, the pressure washing wastewater contains impurity particles with different particle sizes, so that the filtering precision is too low, the efficiency is high, and the filtered water cannot reach the recycling level; the filtration accuracy is too high, but the efficiency is too low. Therefore, a proper filtering device needs to be found for multi-stage filtering, and the aim of considering both the filtering precision and the filtering efficiency is achieved.
Prior art CN205690952U aim at solves the waste water waste heat loss problem that exists, provides a concise waste water waste heat utilization equipment of chemical fibre enterprise viscose filament yarn, can be with waste heat recovery in the waste water and reuse. The technical blank that the existing waste glue recovery scheme can not recover the waste glue and continuously use the waste glue as the production of the viscose filament yarn is made up in CN204644527U, the waste glue is directly added into the normal viscose after being filtered and treated, and enters a viscose large-scale production system for producing the viscose filament yarn, and the technical scheme has more obvious economic benefit compared with the technical scheme used for producing the viscose staple yarn, and simultaneously has the advantages of reducing the environmental protection pressure, improving the viscose production efficiency and the like. In the same way, CN206232870U solves the problem that the recovered waste rubber affects the spinnability of spinning, optimizes the waste rubber recovery system, adopts different treatment modes for different waste rubbers, ensures that the waste rubber has uniform maturation degree and particle number meeting the production requirement, and simultaneously is independently used in a certain region variety to avoid the quality influence of the spinnability of large-scale production on high-end products caused by mixing with the waste rubber of a large-scale system. CN101532191A is used for solving the problem of recycling dialysis waste lye, which breaks the habit bias that the dialysis pressure liquid waste lye can not be recycled due to the high content of hemicellulose, and the dialysis pressure liquid waste lye is used for the refining and desulfurizing process of spinning cakes after being mixed with a certain proportion of dense alkali, and the small test, the middle test and the trial on the production line show that the method has no influence on the main quality indexes of viscose filament, such as dry strength, dry extension, dyeing and the like, and the indexes of the appearance broken filament degradation rate and the color degradation rate of the viscose filament do not change due to the hemicellulose contained in the dialysis pressure liquid waste lye. The device is simple and easy to realize. CN107500464A discloses "a method for treating acidic wastewater of viscose fiber factory".
Therefore, based on the technologies disclosed in the prior art, a treatment system suitable for the medium-pressure washing line sewage in viscose filament yarn production is urgently needed to improve the efficiency and quality of the sewage treatment of the medium-pressure washing line.
Disclosure of Invention
The utility model aims to solve the defects of the prior art and provides a system for recycling sewage of a pressure washing line in viscose filament yarn production. In the technical scheme, the arrangement of the heat exchange device, the mixing device, the sedimentation tank, the full-automatic backwashing filter, the ultrafiltration membrane device, the water production tank and the like is adopted, the sewage of the pressure washing line in the production of the viscose filaments is orderly and effectively treated, and then the obtained purified water is reused for the pressure washing line or other production lines, so that the resource is saved, and the environment is protected.
In order to achieve the technical purpose, the following technical scheme is proposed:
a recycling system for sewage of a pressure washing line in viscose filament yarn production comprises a heat exchange device, a mixing device, a sedimentation tank, a full-automatic back-washing filter and an ultrafiltration membrane device which are connected with the pressure washing line, wherein an upper feed inlet of the heat exchange device is connected with the pressure washing line through a pressure washing line sewage pipe, an upper discharge outlet of the heat exchange device is connected with an upper feed inlet of the mixing device, and the mixing device is connected with a front spinning process through an acid removal water pipe; the upper discharge port of the mixing device is connected with the sedimentation tank, the sedimentation tank is connected with the upper feed port of the full-automatic backwashing filter, the outlet of the filtered fluid on the full-automatic backwashing filter is connected with the upper feed port of the ultrafiltration membrane device, the outlet of the filtered fluid on the ultrafiltration membrane device is connected with the water production tank through a purified water pipe, the water production tank is connected with the pressure washing line through a recycling pipe, and a pressure washing line sewage pipe, a heat exchange device, the mixing device, the sedimentation tank, the full-automatic backwashing filter, the ultrafiltration membrane device, the purified water pipe, the water production tank and the recycling pipe form a pressure washing line sewage circulation treatment and recycling passage.
Furthermore, heat transfer device is connected with cooling water and advances pipe and comdenstion water exit tube, and the cooling water advances pipe and comdenstion water exit tube all with the water pipe intercommunication for production, guarantees this system and suits according to local conditions, better being adapted to viscose filament production line, and then improves the utilizability of this system.
Furthermore, heat transfer device is plate heat exchanger, and its waste heat of handling pressure washing line sewage reduces the membrane temperature of advancing of pressure washing line waste water, makes it can reach the normal operating temperature scope of milipore filter in the milipore filter device, and the better circulation that is adapted to pressure washing line sewage on the one hand is handled and is recycled technology, and on the other hand guarantees the job stabilization nature of equipment device in the follow-up processes to and improve life.
Furthermore, the outlet of the trapped fluid on the full-automatic backwashing filter is connected with an environment-friendly treatment system through a concentrated liquid conveying pipe, the outlet of the trapped fluid on the ultrafiltration membrane device is connected with the concentrated liquid conveying pipe, and the formed trapped fluid (mainly including sticky substances, solid insoluble substances and the like) is sent into the environment-friendly treatment system to be subjected to targeted and professional treatment, so that the pressure washing line sewage treatment efficiency and quality of the system are improved.
In the present recycling system, the following devices are involved:
the heat exchange device comprises: the waste heat in the sewage of the pressure washing line is treated, and the temperature of the sewage entering the membrane of the pressure washing line is reduced, so that the temperature of the sewage can reach the normal working temperature range of the ultrafiltration membrane;
a mixer: ensuring that the wastewater of the pressure washing line is fully mixed with the acid water removed by spinning, so that the pH value of the wastewater of the pressure washing line reaches the normal working range of the ultrafiltration membrane;
a sedimentation tank: primarily removing impurities such as silt and the like in the sewage of the pressure washing line;
full-automatic back flush filter: utilize the filter screen directly to intercept impurity, floater, particulate matter etc. in the liquid, reduce the turbidity of water simultaneously, reduce the dirt, prevent the large granule fish tail of aquatic and block up ultrafiltration membrane system, ensure that ultrafiltration system equipment normally works behind. The operation and control of the device can automatically clean and filter without any external energy source, and automatically discharge sewage;
ultrafiltration membrane device: the ultrafiltration membrane adopts an external pressure hollow fiber membrane wire, the filtering direction stops colloid, insoluble fine substances and the like in the pressure washing line sewage at the outer side of the hollow fiber membrane wire from outside to inside, and produced water is pumped out from the inner side of the membrane wire through the water inlet pressure, so that the treated sewage reaches the level of recycling;
a water producing pool: the device is used for temporarily storing purified water to ensure the stability of the recycled or externally supplied purified water;
and, the working principle involved includes:
the full-automatic backwashing filter is a solid-liquid separation device which takes an internal filter screen as a filter medium and takes pressure difference on two sides of the filter as driving force, sewage flows from the inside to the outside of the filter element, solid suspended matters, large granular impurities and the like in the sewage of a pressure washing line are intercepted in the filter element, and a prior condition is provided for the operation of an ultrafiltration membrane;
the ultrafiltration membrane is a solution separation device which takes ultrafiltration membrane filaments as a filter medium and takes the pressure difference between two sides of the membrane as a driving force. The ultrafiltration membrane only allows solvents (such as water molecules), inorganic salts, small molecular organic matters and the like in the solution to permeate, and retains suspended substances, colloids, proteins, microorganisms and other macromolecular substances in the solution, thereby achieving the purposes of purification and separation.
In this technical scheme, produce the pond and still can be connected with other processes on the long filament viscose production line through the pipeline to and carry out other outer confessions. According to actual requirements, a control valve, a delivery pump, a pressure transmitter, a temperature transmitter and the like can be arranged on each pipeline; the communication between the pipeline and another pipeline can adopt a three-way valve and the like; and ion concentration detectors are arranged on the mixing device and the sedimentation tank.
The positional relationships such as "up" and "between" in the present technical solution are defined according to the actual usage state, and are conventional terms in the technical field and also conventional terms in the actual usage process of the person skilled in the art.
In the description of the present technical solution, it should be noted that, unless explicitly stated or limited otherwise, the terms "disposed" and "connected" should be understood broadly, for example, they may be fixedly connected, conveniently connected, or integrally connected; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements unless otherwise specifically limited or defined herein. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
By adopting the technical scheme, the beneficial technical effects brought are as follows:
in the utility model, through the arrangement of the heat exchange device, the mixing device, the sedimentation tank, the full-automatic back-washing filter, the ultrafiltration membrane device, the water production tank and the like, the sewage of the medium-pressure washing line in the production of the viscose filaments is orderly and effectively treated, and then the obtained purified water is reused for the pressure washing line or other production lines, so that the resource is saved and the environment is protected;
the full-automatic backwashing filter and the ultrafiltration membrane device are combined for use, so that both the filtering efficiency and the filtering precision can be taken into consideration, and the purpose of high-efficiency water purification is achieved;
the sewage of the pressure washing line is treated and recycled, so that the aim of saving water resources is fulfilled, the environmental protection treatment pressure is reduced, and the sewage treatment cost is reduced;
in addition, the cyclic treatment recycling system for the sewage of the medium-pressure washing line in the production of the viscose filaments provides treatment measures for the wastewater treatment in the production of the viscose filaments and provides effective schemes for sewage discharge and waste discharge treatment, water resource sources and the like for the production of the viscose filaments.
Drawings
FIG. 1 is a schematic diagram of the logical connections of the present invention;
in the figure, 1, a pressure washing line sewage pipe, 2, a heat exchange device, 3, a mixing device, 4, a sedimentation tank, 5, a full-automatic back washing filter, 6, an ultrafiltration membrane device, 7, a deacidification water pipe, 8, a purified water pipe, 9, a water production tank, 10, a recycling pipe, 11, a cooling water inlet pipe, 12, a condensed water outlet pipe, 13, a production water pipe, 14 and a concentrated liquid conveying pipe.
Detailed Description
In the following, the technical solutions in the embodiments of the present invention are clearly and completely described, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
In the production of viscose filament yarns, sewage discharged by a refining press-washing line needs to be purified, and then water is recycled, so that the aim of secondary utilization is finally achieved. However, the sewage of the pressure washing line contains impurity particles with different particle sizes, so that the filtering precision is too low, the efficiency is high, and the filtered water cannot reach the recycling grade; or, the filtering precision is too high, but the efficiency is too low, so that a proper filtering device needs to be found for multi-stage filtering, and the aim of considering both the filtering precision and the filtering efficiency is achieved.
Through multiple tests and statistics, the inventor finds that the full-automatic backwashing filter 5 and the ultrafiltration membrane device 6 are combined for use, so that the filtering efficiency and the filtering precision can be considered, and the purpose of high-efficiency water purification is achieved. The sewage recycling system for the medium-pressure washing line in the viscose filament yarn production comprises:
the device comprises a heat exchange device 2, a mixing device 3, a sedimentation tank 4, a full-automatic back-washing filter 5 and an ultrafiltration membrane device 6 which are connected with a pressure washing line, wherein an upper feed inlet of the heat exchange device 2 is connected with the pressure washing line through a pressure washing line sewage pipe 1, an upper discharge outlet of the heat exchange device 2 is connected with an upper feed inlet of the mixing device 3, and the mixing device 3 is connected with a spinning process through an acid removal water pipe 7; the upper discharge port of the mixing device 3 is connected with the sedimentation tank 4, the sedimentation tank 4 is connected with the upper feed port of the full-automatic back-flushing filter 5, the filtrate outlet of the full-automatic back-flushing filter 5 is connected with the upper feed port of the ultrafiltration membrane device 6, the filtrate outlet of the ultrafiltration membrane device 6 is connected with the water production tank 9 through the purified water pipe 8, the water production tank 9 is connected with the pressure washing line through the recycling pipe 10, and a pressure washing line sewage pipe 1, a heat exchange device 2, the mixing device 3, the sedimentation tank 4, the full-automatic back-flushing filter 5, the ultrafiltration membrane device 6, the purified water pipe 8, the water production tank 9 and the recycling pipe 10 form a passage for recycling sewage of the pressure washing line.
In this embodiment, firstly, the pressure washing line sewage is subjected to cooling treatment by the heat exchange device 2, so that the cooled sewage is better adapted to a recycling treatment process, and the working stability of equipment devices in subsequent processes is ensured and the service life is prolonged; then, introducing the cooled sewage into a mixing device 3, regulating the pH value of the sewage under the neutralization of acid water removed by spinning, and enabling the pH value of the sewage to reach the normal working range of an ultrafiltration membrane, namely performing pretreatment work on the subsequent filtration process; then introducing the neutralized sewage into a sedimentation tank 4, and removing impurities such as silt and the like in the water; introducing the precipitated sewage into a full-automatic backwashing filter 5 to remove large-particle impurities and solid suspended matters in the sewage; introducing the filtrate in the full-automatic backwashing filter 5 into an ultrafiltration membrane device 6, and removing colloid and insoluble fine substances in the filtrate of the full-automatic backwashing filter 5 by the ultrafiltration membrane device 6 to ensure that the wastewater treated by the ultrafiltration membrane device 6 (namely the filtrate in the ultrafiltration membrane device 6) reaches a recyclable grade; finally, the obtained purified water is temporarily stored in a water producing tank 9 and is reused for pressure washing or external supply.
Wherein, the ultrafiltration membrane component that this ultrafiltration membrane device 6 relates to adopts external pressure hollow fiber membrane silk, and the direction of filtration is from outside to inside, and the pollutant that is detained stops in the outside of hollow fiber membrane silk, and the product water is taken out from the inboard of membrane silk through the pressure of intaking. The nominal pore diameter of the membrane silk filtration is 0.03 micron, and the asymmetric membrane pore structure reduces the filtration resistance and ensures high flux. The ultrafiltration membrane wire is made of PVDF (polyvinylidene fluoride), and the reinforcing ribs are arranged in the ultrafiltration membrane wire.
The ultrafiltration system related to the ultrafiltration membrane device 6 runs in a dead-end filtration mode, and under the dead-end filtration mode, inflow water flows into the membrane tube to push and press the membrane, and produced water is produced from the membrane filaments. Compare traditional hollow fiber design and all encapsulate the both ends of membrane silk, this milipore filter adopts unique single-end encapsulation membrane element as the characteristic, and traditional hollow fiber double head design has been increased the swing of membrane flux and membrane silk to this mode, has alleviateed the stress of membrane silk, avoids the pollutant gathering to form the blind spot simultaneously. The reinforced membrane filaments are only packaged at the top of the reinforced membrane filaments, so that the membrane filaments can freely swing in the scrubbing process, the air inflation can more completely permeate into the membrane bundle, and the loosened solid substances can fall to the bottom of the membrane bundle to be discharged due to the open flow channel design of the membrane piece.
Trapped fluid (mainly including sticky substances, solid insoluble substances and the like) generated in the full-automatic backwashing filter 5 and the ultrafiltration membrane device 6 is conveyed into an environment-friendly treatment system through a concentrated fluid conveying pipe 14 to be subjected to targeted and professional treatment, and the efficiency and the quality of the pressure washing line sewage treatment of the system are improved.
Example 2
Based on example 1, this example describes how the heat exchange device 2, further,
The heat exchange device 2 is a plate heat exchanger, and is used for treating waste heat of the pressure washing line sewage, reducing the membrane inlet temperature of the pressure washing line sewage, enabling the pressure washing line sewage to reach the normal working temperature range of the ultrafiltration membrane in the ultrafiltration membrane device 6, better adapting to the cyclic treatment and recycling process of the pressure washing line sewage on the one hand, and ensuring the working stability of equipment devices in subsequent procedures and prolonging the service life on the other hand.
Example 3
Based on examples 1-2, this example deals with the retentate discharged from the fully automatic backwashing filter 5 and the ultrafiltration membrane apparatus 6, and further,
the outlet of the trapped liquid on the full-automatic backwashing filter 5 is connected with the environment-friendly treatment system through a concentrated liquid conveying pipe 14, the outlet of the trapped liquid on the ultrafiltration membrane device 6 is connected with the concentrated liquid conveying pipe 14, and the formed trapped liquid (mainly including sticky substances, solid insoluble substances and the like) is sent into the environment-friendly treatment system to be subjected to targeted and professional treatment, so that the pressure washing line sewage treatment efficiency and quality of the system are improved.
Claims (4)
1. The utility model provides a cyclic processing system of recycling of line sewage is washed to pressure in viscose filament yarn production which characterized in that: the device comprises a heat exchange device (2) connected with a pressure washing line, a mixing device (3), a sedimentation tank (4), a full-automatic back-washing filter (5) and an ultrafiltration membrane device (6), wherein an upper feed inlet of the heat exchange device (2) is connected with the pressure washing line through a pressure washing line sewage pipe (1), an upper discharge outlet of the heat exchange device (2) is connected with an upper feed inlet of the mixing device (3), and the mixing device (3) is connected with a pre-spinning process through an acid removal water pipe (7); the upper discharge port of the mixing device (3) is connected with the sedimentation tank (4), the sedimentation tank (4) is connected with the upper feed port of the full-automatic backwashing filter (5), the filtered fluid outlet of the full-automatic backwashing filter (5) is connected with the upper feed port of the ultrafiltration membrane device (6), the filtered fluid outlet of the ultrafiltration membrane device (6) is connected with the water production tank (9) through a water purification pipe (8), the water production tank (9) is connected with the pressure washing line through a recycling pipe (10), and a path for recycling sewage of the pressure washing line is formed among the pressure washing line sewage pipe (1), the heat exchange device (2), the mixing device (3), the sedimentation tank (4), the full-automatic backwashing filter (5), the ultrafiltration membrane device (6), the water purification pipe (8), the water production tank (9) and the recycling pipe (10).
2. The sewage recycling system for the medium-pressure washing line in the viscose filament yarn production according to claim 1, which is characterized in that: the heat exchange device (2) is connected with a cooling water inlet pipe (11) and a condensed water outlet pipe (12), and the cooling water inlet pipe (11) and the condensed water outlet pipe (12) are communicated with a production water pipe (13).
3. The sewage recycling system for the medium-pressure washing line in the viscose filament yarn production according to claim 1, which is characterized in that: the heat exchange device (2) is a plate heat exchanger.
4. The sewage recycling system for the medium-pressure washing line in the viscose filament yarn production according to claim 1, which is characterized in that: the trapped liquid outlet on the full-automatic backwashing filter (5) is connected with an environment-friendly treatment system through a concentrated liquid conveying pipe (14), and the trapped liquid outlet on the ultrafiltration membrane device (6) is connected with the concentrated liquid conveying pipe (14).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202123374351.3U CN216890480U (en) | 2021-12-30 | 2021-12-30 | System for recycling sewage generated in medium-pressure washing line in viscose filament yarn production |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202123374351.3U CN216890480U (en) | 2021-12-30 | 2021-12-30 | System for recycling sewage generated in medium-pressure washing line in viscose filament yarn production |
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