CN210945449U

CN210945449U - A device for old and useless polyester-cotton is retrieved

Info

Publication number: CN210945449U
Application number: CN201921786174.XU
Authority: CN
Inventors: 钱麓安; 龚龑; 杨中开; 方秀琳
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-10-24
Filing date: 2019-10-23
Publication date: 2020-07-07
Anticipated expiration: 2029-10-23

Abstract

The utility model discloses a device for old and useless polyester-cotton is retrieved, including consecutive crushing equipment, alcoholysis pond, filter, distiller, regeneration pond and spinning equipment, wherein the alcoholysis pond uses the ethylene glycol to carry out the alcoholysis to old and useless polyester-cotton, the inboard top of distiller is located to filter an organic whole, and the setting of distiller outer wall is worn out in the stoving wind channel that links to each other with the filter inner bag, the stoving wind channel extends to the bottom along the distiller outside and links to each other with the heat source, the heat source provides the heat for the stoving of cotton dregs in the filter and the distillation process of alcoholysis thing in the distiller, be equipped with the fan that is close to the heat source in the stoving wind channel, the fan operation is dried the solid cotton dregs in carrying the filter inner bag with the heat that the heat source produced through the stoving wind channel, goes on when messenger's.

Description

A device for old and useless polyester-cotton is retrieved

Technical Field

The utility model belongs to the PET field of retrieving, specifically speaking relates to a device that is used for old and useless polyester-cotton to retrieve.

Background

In the existing polyester-cotton recovery technology, a porous compression roller conveyer belt provided with a cotton scraper is usually adopted to treat alcoholysis substances of waste polyester-cotton so as to separate cotton fibers in the alcoholysis substances, and separated liquid components are sent into a distiller to be distilled. However, the filtering efficiency is low by adopting the equipment, multiple times of filtering are needed to fully collect the liquid in the alcoholysis product, and the filtered cotton fiber is also needed to be independently dried and the like, so that the recycling cost is increased.

Chinese patent application No. 201410621070.9 discloses a device and process for continuously separating and recovering waste polyester-cotton textiles, wherein the device comprises (a) an alcoholysis polycondensation system: comprises an alcoholysis kettle, an alcoholysis product collecting tank, a fine filter, a concentration device, a pre-polycondensation kettle and a final polycondensation kettle which are connected in sequence; (II) a continuous separation system: comprises two sets of continuous separation equipment, an alcoholysis substance collecting tank, a cotton fiber collecting and washing tank, a washing liquid collecting tank and a cotton fiber collecting tank. The process comprises the following steps: sending the crushed waste polyester-cotton textiles to an alcoholysis kettle to carry out alcoholysis on polyester in the waste polyester-cotton textiles with ethylene glycol; the mixture of the alcoholysate and the cotton fiber is subjected to two times of continuous separation to obtain washed cotton fiber and washing liquid which are recycled; and filtering, concentrating, pre-polycondensing and final polycondensing the separated alcoholysis product to obtain the regenerated PET polyester. Wherein, at least two sets of continuous separation equipment are adopted to completely separate the solid cotton residue from the liquid component in the alcoholysis product, the structure is complex and the cost is increased; in addition, the subsequent treatment of the separated solids needs to be performed separately from the distillation of the liquid, reducing the efficiency of recovery.

In view of this, the present invention is especially provided.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model lies in overcoming the not enough of prior art, provides an old and useless polyester-cotton recovery unit, the device sets up filter and distiller integration, when simplifying filtration, utilizes same heat source to dry simultaneously and the distillation process, has improved recovery efficiency greatly. Consider that if the polyester in the old and useless polyester-cotton is the monomer for complete alcoholysis, need great energy consumption and ethylene glycol quantity, simultaneously because a large amount of ethylene glycol easily generate the diglycol under the high temperature condition for a long time reaction, can make the content of diglycol exceed standard in the regeneration polyester, lead to regeneration polyester quality to descend, consequently the utility model discloses a "semi-degradation tackification" technology utilizes this device to retrieve a large amount of ethylene glycol in the alcoholysis product, repolymerization in order to obtain regeneration polyester with remaining BHET and trace polymer.

In order to achieve the above technical effects, the utility model adopts the following technical scheme:

the utility model provides a device for recycling waste polyester cotton, which comprises a crushing device 3, an alcoholysis tank 4, a filter 1, a distiller 2, a regeneration tank 6 and a spinning device 7 which are connected in sequence, wherein the alcoholysis tank 4 is used for alcoholysis of waste polyester cotton by using ethylene glycol, the filter 1 is arranged at the top of the inner side of the distiller 2, a drying air duct 13 connected with the inner container of the filter 1 penetrates out of the outer wall of the distiller 2, the drying air duct 13 extends to the bottom along the outer side of the distiller 2 to be connected with a heat source 21, the heat source 21 provides heat for the drying of cotton dregs in the filter 1 and the distillation process of alcoholysis substances in the distiller 2, a fan 131 close to the heat source 21 is arranged in the drying air duct 13, and the fan 131 operates to convey heat generated by the heat source 21 to the inner container of the filter 1 through the drying air duct 13 to dry the solid cotton dregs, so that the drying process and the distillation process are carried out simultaneously.

In the above scheme, the filter 1 is arranged at the top of the inner side of the distiller 2, alcoholysis substances passing through the alcoholysis tank 4 are sent to the filter 1 for filtration, and filtrate is released from the bottom of the filter 1 and flows into the distiller 2 and is enriched at the bottom of the distiller, so that the filtrate can be further distilled. Solid cotton dregs after filtration are retained in the inner container of the filter 1, so that a drying air duct is arranged in the inner container communicated with the filter 1, the drying air duct extends from the inside of the filter 1 to the outer side of the distiller 2 and extends downwards to be connected with a heat source 21, after alcoholysis substances in the filter 1 are filtered, distillation is started, and the heat source 21 provides heat for the distillation process. Meanwhile, under the action of the fan 131, the heat generated by the heat source 21 is transferred into the filter 1 through the drying air duct 13 to dry the solid cotton dregs. The heat source 21 not only provides heat for drying cotton residue solids in the filter 1, but also provides heat for distilling filtrate at the bottom of the distiller 2, so that drying and distilling can be carried out simultaneously, and compared with the process of separating solid cotton fibers and drying after transferring the filtrate to the distiller in the prior art, the recovery efficiency is improved; and the same heat source is adopted to provide heat for drying and distillation at the same time, so that the utilization efficiency of energy is improved. The heat source may be selected from an electric heating tube or a PTC heater. The utility model provides an old and useless polyester-cotton recovery unit still includes main electrical system, respectively with ethylene glycol concentration on-line measuring system, temperature control system, the valve of each pipeline or passageway to and part electric drive part looks electricity is connected. The related setting of the main control system can be completed by those skilled in the art under the guidance of a related-art book (such as chemical process control system published by chemical industry publishers in 2006, author luming huo, and ann).

The utility model discloses a further scheme does: the top of the filter 1 is arranged corresponding to a feed inlet 15 of the alcoholysis product, the feed inlet 15 is connected with the alcoholysis tank 4, the alcoholysis product enters the inner container of the filter 1 through the feed inlet 15, the bottom of the inner container of the filter 1 is provided with a plurality of sieve pores 12 so as to filter the liquid component of the alcoholysis product into the distiller 2, and meanwhile, the solid cotton residue in the alcoholysis product is left in the inner container of the filter 1.

In the scheme, alcoholysis substances are generated after waste polyester cotton is subjected to alcoholysis by ethylene glycol in an alcoholysis tank 4, a feed port 15 for feeding the alcoholysis substances is formed in the top of a filter 1, and the alcoholysis substances are pumped into the filter 1 through the feed port 15; and because the bottom of the inner container of the filter 1 is provided with the sieve holes 12, the solid component of the alcoholysis product is remained in the filter 1, and the filtrate is directly filtered into the distiller 2 through the sieve holes 12 for distillation.

The utility model discloses a further scheme does: the bottom of the inner container of the filter 1 is connected with a rotary drum 11 driven by a motor 19, the top surface of the rotary drum 11 is provided with an opening corresponding to an alcoholysis substance feed port 15, the side wall and the bottom surface of the rotary drum 11 are provided with a plurality of holes, the rotary drum 11 is driven by the motor to rotate so as to spin-dry liquid in solid cotton residues of the alcoholysis substance, and the spun-off liquid penetrates through the holes and is combined into the distiller 2 through a sieve hole 12.

In the above scheme, but be provided with high-speed rotatory rotary drum 11 in the filter 1, the top surface opening and the corresponding setting of feed inlet 15 of rotary drum 11 for the alcoholysis thing that contains solid cotton dregs falls into the rotary drum 11 completely, later control motor drive rotary drum 11 is rotatory, because the lateral wall and the bottom surface of rotary drum 11 all are equipped with the hole that supplies the liquid to filter, therefore the centrifugal force that the high-speed rotation of rotary drum 11 produced with solid cotton dregs equipartition on the bucket lateral wall, simultaneously under centrifugal force, remaining liquid in the solid cotton dregs is also thrown away to the outside the rotary drum, and flow down along with the inner wall of filter 1 inner bag under the action of gravity, flow into distiller 2 through sieve mesh 12. The motor is controlled by a main electric control system and can rotate forwards or backwards at different speeds. The utility model provides a centrifugal force that the rotary drum structure produced through the governing speed can be with the liquid separation in the solid cotton sediment, and the porous conveyer belt who is equipped with of comparing often adopting among the prior art and scrapes cotton ware and compression roller has better separation effect, does not need a plurality of filtration of repetition to separate the alcoholysis thing, has reduced old and useless cotton recovery unit's of washing structure complexity, has reduced equipment cost. The diameter of the holes in the rotating drum 11 can be set according to the average size of the solid cotton dregs, so that the holes are only used for liquid to pass through, and the solid cotton dregs are prevented from being thrown out of the rotating drum 11.

The utility model discloses a further scheme does: the top of the distiller 2 is provided with a distillation opening 22, the distillation opening 22 is communicated with the alcoholysis tank 4 through a condenser 5, and the glycol in the alcoholysis product is heated and evaporated under the action of a heat source 21 and then is cooled and refluxed to the alcoholysis tank 4 through the condenser 5, so that the recycling of the glycol is realized.

Among the above-mentioned scheme, distiller 2 passes through condenser 5 with alcoholysis pond 4 and links to each other, and under the distillation of distiller 2, the ethylene glycol in the alcoholysis thing filtrating evaporates into gas to in condensing reflux to alcoholysis pond 4, on the one hand, because ethylene glycol reacts for a long time under the high temperature and easily generates diethylene glycol, can make the diethylene glycol content in the polyester chip in the regeneration process exceed standard, lead to regeneration polyester quality to descend, consequently the utility model discloses an ethylene glycol reflux unit can reduce the ethylene glycol content in the alcoholysis thing filtrating, improves regeneration polyester's quality; on the other hand, the excessive ethylene glycol flows back to the alcoholysis tank, so that the ethylene glycol consumed in the subsequent alcoholysis process can be saved, and the utilization rate of the ethylene glycol is improved.

The utility model discloses a further scheme does: the bottom of the inner side of the distiller 2 is provided with a detector 23 for detecting the concentration of ethylene glycol, the content of the ethylene glycol in the liquid alcoholysis product is controlled by distillation, and the redundant ethylene glycol is condensed and refluxed to alcoholysis equipment.

Among the above-mentioned scheme, for the ethylene glycol content in the effective control alcoholysis thing filtrating, the utility model discloses a 2 bottoms of distiller are equipped with ethylene glycol concentration detector, and when the distillation reached the certain time, the ethylene glycol concentration that the detector acquireed dropped to reasonable scope, stopped the distillation this moment to handle on next step alcoholysis thing pump sending to regeneration tank. The ethylene glycol concentration detector can be an ethylene glycol concentration IPR online concentration detection system provided by German Schmidt-Henxi instrument company, the online concentration detector is directly arranged on a production process pipeline or a tank container, parameters such as refractive index, concentration, density, soluble solid content and the like of liquid in the pipeline are continuously measured, data are remotely transmitted to a DCS/PLC of a monitoring room or an online detection instrument of a computer/monitoring room through a 4-20mA standard signal and a digital RS digital interface, and 24-hour automatic continuous measurement of a product line is realized. The specific principle of the method adopts a refraction method for detection, is not influenced by the color, turbidity and viscosity of the material to be detected, bubbles, solid impurities and crystals in the material, liquid pressure change, flow temperature mutation and turbulence phenomenon, and has no mechanical action measurement, stability guarantee and long service life. The detector can be used for detecting the concentration of ethylene glycol in distillate in real time, and in order to solve the problem that high nonlinearity and serious uncertainty of the rectification process are the difficulties of online detection, a person skilled in the art can establish an artificial neural network soft measurement model of the concentration of ethylene glycol in the distillation process under the guidance of BP improved algorithm and application thereof in ethylene glycol refining soft measurement (Zhang Lei et al, automated instruments, volume 26, 6 th year, 6 th month 2005) in the prior art, and the model is used for an analysis control terminal connected with the detector, so that the detection result has higher precision.

The utility model discloses a further scheme does: the bottom of the inner side of the distiller 2 is provided with a temperature detector 25 for detecting the temperature of the liquid, and the temperature of the liquid is monitored in real time in the distilling process.

In the above scheme, in order to effectively avoid the phenomenon that the ethylene glycol is subjected to polymerization reaction in advance due to excessive heat generation of the heat source 21, the bottom of the distiller 2 is provided with the liquid temperature detector, so that the liquid temperature in the distillation process is monitored in real time, the heat supply of the heat source 21 is controlled to keep the stability of the liquid temperature, and the generation of impurities to influence the subsequent polyester is prevented. The temperature detector can be a temperature measuring device in a reaction kettle temperature control system provided by Lidesh mechanical Co, Ltd, and the temperature control in the reaction process is realized by the temperature control system.

The utility model discloses a further scheme does: the top of the inner container of the filter 1 is provided with a channel 14 connected with a distillation port 22 at the top of the distiller 2, so that steam generated by drying the solid cotton dregs enters the condenser 5 through the channel 14 to be cooled and reflowed to the alcoholysis tank 4.

In the scheme, the liquid remaining in the solid cotton dregs generates damp and hot steam under the drying action of the heat provided by the heat source, and the damp and hot steam and the fraction in the distiller 2 are simultaneously condensed and refluxed to the alcoholysis tank 4 through the channel 14. Therefore, the technical scheme provided by the utility model not only accomplished the drying process of solid cotton dregs, further with remaining ethylene glycol composition recovery in the cotton dregs.

The utility model discloses a further scheme does: a lower baffle plate 18 and a rotatable upper baffle plate 17 which is coaxial with the lower baffle plate 18 are fixed at the bottom of the filter 1, a plurality of first sieve holes 121 are arranged on the upper baffle plate 17 in the radial direction, and a plurality of second sieve holes 122 corresponding to the first sieve holes 121 are arranged on the lower baffle plate 18 in the radial direction; when the upper baffle 17 rotates to the position that the first sieve hole 121 and the second sieve hole 122 are staggered, the bottom of the distiller 2 is closed, and when the upper baffle 17 rotates to the position that the first sieve hole 121 and the second sieve hole 122 are aligned, the bottom of the distiller 2 is opened; the bottom of distiller 2 is kept open during alcoholysis filtration, and the bottom of distiller 2 is kept closed during distillation and drying; the feed opening 15 remains closed during drying of the solid cotton dregs by the filter 1.

In the above scheme, the fraction generated by distillation can be dissipated upwards, and the filter 1 is arranged at the top of the inner side of the distiller 2, so that in the distillation process, in order to prevent damp and hot steam from entering the filter 1 to influence the drying process, the first sieve holes and the second sieve holes are staggered by rotating the upper baffle plate 17 to seal the bottom of the filter 1, so that the filter 1 and the distiller 2 form relatively independent spaces. The rotation of the upper baffle is driven by a stepping motor, the stepping motor receives a pulse signal sent by a main electric control system and drives the upper baffle to rotate by a specific angle, and therefore the first sieve holes of the upper baffle and the second sieve holes of the lower baffle are staggered or aligned. The lower baffle is integrally formed with the bottom of the distiller or is embedded into the bottom of the distiller to be fixedly arranged. The feed inlet 15 is externally connected with a pipeline connected with the alcoholysis tank, and an electric control stop valve is arranged on the pipeline and can receive signals sent by a main electric control system to realize the opening and closing of the feed inlet.

The utility model discloses a further scheme does: and a stop valve is arranged on the channel 14, and is kept open in the process of drying the solid cotton dregs by the filter 1, and is kept closed at other times.

In the scheme, in order to send the damp and hot steam generated by drying the solid cotton dregs into the condenser 5, the channel 14 connected with the distillation opening 22 is opened in the drying process, so that the distillate in the distiller 2 and the damp and hot steam in the filter 1 are combined and then condensed and refluxed, and the recovery efficiency of the ethylene glycol is improved while cotton dregs fiber is dried. The stop valve can be an electric control stop valve, and the on-off of the switch is realized by receiving a signal sent by a main electric control system.

The utility model discloses a further scheme does: the top of the distiller 2 is also provided with a recovery port 16 communicated with the opening on the top surface of the filter 1 for collecting the dried solid cotton dregs.

In the above scheme, after the drying is completed, the solid cotton dregs in the filter 1 can be collected through the recovery port 16. The top of the recovery port 16 is covered with a sealing cover which can be manually opened by an operator.

The utility model discloses a further scheme does: the bottom of the distiller 2 is also provided with a pipeline connected with the regeneration tank 6 so as to send the distilled alcoholysis substance into the regeneration tank 6.

The utility model provides an among the old and useless polyester-cotton recovery unit, but other do not specifically describe how to realize the pipeline or the passageway of break-make, technical staff in the field can all adopt suitable kind of valve to realize under the guidance of "guide is selected for use to industrial valve" (national chemical industry equipment design technology central station etc. compile, chemical industry publishing house, first version of 1 month 2014).

After the technical scheme is adopted, compared with the prior art, the utility model following beneficial effect has:

1. in the waste polyester cotton recovery device provided by the utility model, the filter and the distiller are integrally arranged and share the same heat source, so that the liquid in the distiller can be distilled while the solid cotton dregs in the filter are dried, and the recovery efficiency is improved;

2. the filter provided by the utility model adopts the rotary drum spin-drying scheme, so that the liquid in the cotton dregs can be spun and collected into the distiller at one time, and the separation efficiency of the solid and the liquid in the alcoholysis substance is greatly improved compared with the prior art;

3. in the waste polyester cotton recovery device provided by the utility model, the steam generated by the solid cotton residue in the drying filter can be combined with the distilled fraction and condensed and returned to the alcoholysis tank, so that the residual ethylene glycol in the dried cotton residue is effectively utilized;

4. the utility model provides a be provided with the thermoscope of monitoring liquid temperature among the old and useless polyester-cotton recovery unit, on the one hand can adjust the heat source heat supply in order to practice thrift the cost according to monitoring temperature, and the temperature of heat source control distiller liquid is adjusted to the on the other hand accessible, prevents that ethylene glycol from taking place polymerization in the distiller, avoids follow-up step to have impurity to produce.

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention, are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

In the drawings:

FIG. 1 is a schematic structural view of the integrated filter and evaporator of the present invention;

FIG. 2 is a schematic perspective view of a filter and an evaporator according to embodiment 1 of the present invention;

FIG. 3 is a schematic diagram of an explosion structure of the distiller of the present invention with controllable opening and closing at the bottom;

fig. 4 is a schematic connection diagram of the parts of the device provided by the present invention.

In the figure: 1-filter, 11-drum, 12-sieve mesh, 121-first sieve mesh, 122-second sieve mesh, 13-drying air channel, 131-fan, 14-channel, 15-feed inlet, 16-recovery port, 17-upper baffle, 18-lower baffle, 19-motor, 2-distiller, 21-heat source, 22-distillation port, 23-detector, 24-pipeline, 25-temperature detector, 3-crushing device, 4-alcoholysis tank, 5-condenser, 6-regeneration tank and 7-spinning device.

It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate the inventive concept by those skilled in the art with reference to specific embodiments.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments, and the following embodiments are used for illustrating the present invention, but do not limit the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1

In the embodiment, as shown in fig. 1, a device for recycling waste polyester cotton is provided, which comprises a crushing device 3, an alcoholysis tank 4, a filter 1, a distiller 2, a regeneration tank 6 and a spinning device 7 connected in sequence, wherein the alcoholysis tank 4 is used for alcoholysis of waste polyester cotton by using ethylene glycol, the filter 1 is arranged at the top of the inner side of the distiller 2, a drying air duct 13 connected with the inner container of the filter 1 penetrates out of the outer wall of the distiller 2, the drying air duct 13 extends to the bottom along the outer side of the distiller 2 to be connected with a heat source 21, the heat source 21 provides heat for the drying of cotton dregs in the filter 1 and the distillation process of alcoholysis substances in the distiller 2, a fan 131 close to the heat source 21 is arranged in the drying air duct 13, and the fan 131 operates to convey heat generated by the heat source 21 to the inner container of the filter 1 through the drying air duct 13 to dry the solid cotton dregs, so that the drying process and the distillation process are carried out simultaneously.

In this embodiment, the filter 1 is disposed at the top of the inner side of the distiller 2, the alcoholysis product passing through the alcoholysis tank 4 is sent to the filter 1 for filtration, and the filtrate is released from the bottom of the filter 1 and flows into the distiller 2 and is enriched at the bottom thereof, so as to further distill the filtrate. Solid cotton dregs after filtration are retained in the inner container of the filter 1, so that a drying air duct is arranged in the inner container communicated with the filter 1, the drying air duct extends from the inside of the filter 1 to the outer side of the distiller 2 and extends downwards to be connected with a heat source 21, after alcoholysis substances in the filter 1 are filtered, distillation is started, and the heat source 21 provides heat for the distillation process. Meanwhile, under the action of the fan 131, the heat generated by the heat source 21 is transferred into the filter 1 through the drying air duct 13 to dry the solid cotton dregs. The heat source 21 not only provides heat for drying cotton residue solids in the filter 1, but also provides heat for distilling filtrate at the bottom of the distiller 2, so that drying and distilling can be carried out simultaneously, and compared with the process of separating solid cotton fibers and drying after transferring the filtrate to the distiller in the prior art, the recovery efficiency is improved; and the same heat source is adopted to provide heat for drying and distillation at the same time, so that the utilization efficiency of energy is improved.

In this embodiment, as shown in fig. 2, a cylindrical metal casing (similar to a reaction kettle commonly used in the chemical industry, the metal can be a metal material used in a glycol refining distillation tower kettle) can be used as the distiller 2, and a cylindrical filter 1 made of the same metal material and having an open top is disposed at the top inside the cylindrical metal distiller, and the diameter of the filter 1 is smaller than that of the distiller 2 so as to avoid a distillation opening 22 disposed at the top of the distiller 2. The outer side wall of the filter 1 is tightly attached to the inner side wall of the distiller 2, so that the filter 1 is integrally positioned at the top of the inner side of the distiller 2, the filter 1 can be connected to the inner wall of the distiller 2 through technical means such as welding, and reinforcing ribs can be additionally arranged at the welding position to improve the installation strength of the filter 1.

In this embodiment, as shown in fig. 1 and 2, a metal casing is disposed outside the bottom of the distiller 2, a cavity is disposed inside the metal casing, a heat source 21 for supplying heat to the bottom of the distiller 2 is disposed in the cavity, the heat source is selected from an electric heating tube or a PTC heater, a metal tubular drying air duct 13 is connected to one side of the metal casing having the heat source 21, and the drying air duct 13 extends upward from the bottom of the distiller 2, penetrates through the outer wall of the distiller 2, and is connected to the inner container of the filter 1 disposed therein. The metal shell is provided with a fan close to the heat source 21 at one side far away from the drying air duct 13, the heat source 21 and the fan 131 are controlled by a main electric control system to work, hot air generated by the heat source 21 is transmitted into the filter 1 through the drying air duct 13 through the fan 131 to dry the solid cotton dregs, and the metal shell is provided with a vent at the position close to the fan 131 to introduce external air into the drying air duct for heating. Meanwhile, as the heat source 21 is arranged at the outer side of the bottom of the distiller 2, the heat source can also provide heat for the inside of the distiller 2, so that the distillation and drying can be carried out simultaneously.

In this embodiment, the waste polyester-cotton recovery device further comprises a main electric control system, which is electrically connected with the ethylene glycol concentration online detection system, the temperature control system, the valves of the pipelines or the channels, and part of the electric drive components. The related setting of the main control system can be completed by those skilled in the art under the guidance of a related-art book (such as chemical process control system published by chemical industry publishers in 2006, author luming huo, and ann).

In this embodiment, the top of the filter 1 is disposed corresponding to a feeding port 15 of the alcoholysis product, the feeding port 15 is connected to the alcoholysis tank 4, the alcoholysis product enters the inner container of the filter 1 through the feeding port 15, and the bottom of the inner container of the filter 1 is provided with a plurality of sieve pores 12 for filtering the liquid component of the alcoholysis product into the distiller 2 and simultaneously retaining the solid cotton residue in the alcoholysis product in the inner container of the filter 1.

In the embodiment, alcoholysis products are generated after waste polyester cotton is subjected to alcoholysis by ethylene glycol in an alcoholysis tank 4, a feed port 15 for feeding the alcoholysis products is formed in the top of a filter 1, and the alcoholysis products are pumped into the filter 1 through the feed port 15; and because the bottom of the inner container of the filter 1 is provided with the sieve holes 12, the solid component of the alcoholysis product is remained in the filter 1, and the filtrate is directly filtered into the distiller 2 through the sieve holes 12 for distillation.

In this embodiment, as shown in fig. 2, a feed inlet 15 is disposed at the top of the filter 1, a pipeline connected to the alcoholysis tank is connected to the feed inlet 15, and an electrically controlled stop valve (not shown) is disposed on the pipeline and is capable of receiving a signal from a main electrical control system to open and close the feed inlet.

In this embodiment, the bottom of the inner container of the filter 1 is connected with a rotating drum 11 driven by a motor, the top surface of the rotating drum 11 is provided with an opening corresponding to the feeding port 15 for the alcoholysis product, the side wall and the bottom surface of the rotating drum 11 are provided with a plurality of holes, the motor 19 drives the rotating drum 11 to rotate so as to spin-dry the liquid in the solid cotton residue of the alcoholysis product, and the spun-off liquid permeates through the holes and is combined into the distiller 2 through the sieve holes 12.

In this embodiment, a rotating drum 11 capable of rotating at a high speed is arranged in the filter 1, an opening on the top surface of the rotating drum 11 is arranged corresponding to the feed inlet 15, so that alcoholysis substances containing solid cotton residues completely fall into the rotating drum 11, then a main electronic control system controls a motor 19 to drive the rotating drum 11 to rotate, and holes for filtering liquid are formed in the side wall and the bottom surface of the rotating drum 11, so that the solid cotton residues are uniformly distributed on the side wall of the drum by centrifugal force generated by the high-speed rotation of the rotating drum 11, and meanwhile, under the action of the centrifugal force, residual liquid in the solid cotton residues is thrown to the outside of the rotating drum and flows downwards along with the inner wall of the inner container of the filter 1 under the action of gravity. The utility model provides a centrifugal force that the rotary drum structure produced through the governing speed can be with the liquid separation in the solid cotton sediment, and the porous conveyer belt who is equipped with of comparing often adopting among the prior art and scrapes cotton ware and compression roller has better separation effect, does not need a plurality of filtration of repetition to separate the alcoholysis thing, has reduced old and useless cotton recovery unit's of washing structure complexity, has reduced equipment cost.

In this embodiment, as shown in fig. 1 and 2, the cylindrical filter 1 includes a side wall connected to an inner wall of the distiller 2, a bottom wall located at a bottom of the filter 1, and a sieve hole 12 for solution to pass through is formed in the through bottom wall, and further includes a rotating drum 11 disposed inside the cylinder and coaxial with the filter 1, an upper portion of the rotating drum 11 is open, a side wall and a bottom surface of the rotating drum 11 are made of metal material and distributed with a plurality of holes, a diameter of the rotating drum 11 is smaller than a diameter of the opening of the filter 1, and the side wall of the cylinder of the filter 1 is not provided with holes, so that liquid thrown out through the holes of the rotating drum 11 flows down along an inner side wall of the cylinder of the filter 1. A driving motor 19 of the rotary drum 11 is arranged in a metal protective shell at the bottom of the filter 1, and a lead of the motor 19 is arranged by penetrating out of the outer wall of the distiller 2 through a sealed pipeline extending out of one side of the metal protective shell (see the attached figure 2 of the specification for details); in order to install the motor more stably, the metal protective shell can be provided with a supporting piece or a reinforcing piece fixedly connected with the inner wall of the distiller.

In this embodiment, a distillation opening 22 is formed in the top of the distiller 2, the distillation opening 22 is communicated with the alcoholysis tank 4 through a condenser 5, and glycol in the alcoholysis product is heated and evaporated under the action of a heat source 21 and then is cooled and refluxed to the alcoholysis tank 4 through the condenser 5, so that the recycling of the glycol is realized.

In this embodiment, distiller 2 and alcoholysis pond 4 are passed through condenser 5 and are linked to each other, and under the distillation of distiller 2, the ethylene glycol in the alcoholysis thing filtrating evaporates into gas to in going back to alcoholysis pond 4 through the condensation, on the one hand, because ethylene glycol reacts for a long time under the high temperature and easily generates diethylene glycol, can make the diethylene glycol content in the polyester chip in the regeneration process exceed standard, lead to regeneration polyester quality to descend, consequently the utility model discloses an ethylene glycol reflux unit can reduce the ethylene glycol content in the alcoholysis thing filtrating, improves regeneration polyester's quality; on the other hand, the excessive ethylene glycol flows back to the alcoholysis tank, so that the ethylene glycol consumed in the subsequent alcoholysis process can be saved, and the utilization rate of the ethylene glycol is improved.

In this embodiment, a detector 23 for detecting the concentration of ethylene glycol is disposed at the bottom inside the distiller 2, and the content of ethylene glycol in the liquid alcoholysis product is controlled by distillation and the excessive ethylene glycol is condensed and refluxed to the alcoholysis apparatus.

In this embodiment, for the ethylene glycol content in the effective control alcoholysis thing filtrating, the utility model discloses a 2 bottoms of distiller are equipped with ethylene glycol concentration detector, and when the distillation reached the certain time, the ethylene glycol concentration that the detector acquireed dropped to reasonable scope, stopped the distillation this moment to handle on next step alcoholysis thing pump sending to regeneration tank. The ethylene glycol concentration detector can be an ethylene glycol concentration IPR online concentration detection system provided by German Schmidt-Henxi instrument company, the online concentration detector is directly arranged on a production process pipeline or a tank container, parameters such as refractive index, concentration, density, temperature, sugar degree, salinity, soluble solid content and the like of liquid in the pipeline are continuously measured, data are remotely transmitted to an online detection instrument of a DCS/PLC or a computer/monitoring room of the monitoring room through a 4-20mA standard signal and a digital RS digital interface, and 24-hour automatic continuous measurement of a product line is realized. The specific principle of the method adopts a refraction method for detection, is not influenced by the color, turbidity and viscosity of the material to be detected, bubbles, solid impurities and crystals in the material, liquid pressure change, flow temperature mutation and turbulence phenomenon, and has no mechanical action measurement, stability guarantee and long service life. The detector can be used for detecting the concentration of ethylene glycol in distillate in real time, and in order to solve the problem that high nonlinearity and serious uncertainty of the rectification process are the difficulties of online detection, a person skilled in the art can establish an artificial neural network soft measurement model of the concentration of ethylene glycol in the distillation process under the guidance of BP improved algorithm and application thereof in ethylene glycol refining soft measurement (Zhang Lei et al, automated instruments, volume 26, 6 th year, 6 th month 2005) in the prior art, and the model is used for an analysis control terminal connected with the detector, so that the detection result has higher precision.

In this embodiment, a temperature detector 25 for detecting the temperature of the liquid is disposed at the bottom of the inner side of the distiller 2, and the temperature of the liquid is monitored in real time during the distillation process.

In this embodiment, in order to effectively avoid the excessive heat generation of the heat source 21 from causing the polymerization reaction of ethylene glycol to occur in advance, the bottom of the distiller 2 is provided with the liquid temperature detector, so that the liquid temperature in the distillation process is monitored in real time, the heat supply of the heat source 21 is controlled to keep the stability of the liquid temperature, and the generation of impurities to influence the subsequent polyester is prevented. The temperature detector can be a temperature measuring device in a reaction kettle temperature control system provided by Lidesh mechanical Co, Ltd, and the temperature control in the reaction process is realized by the temperature control system.

In this embodiment, the top of the liner of the filter 1 is provided with a channel 14 connected with a distillation port 22 at the top of the distiller 2, so that steam generated by drying the solid cotton dregs enters the condenser 5 through the channel 14 to be cooled and reflowed to the alcoholysis tank 4.

In this embodiment, the distillation opening 22 is connected to the alcoholysis tank 4 through a fraction pipe, the channel 14 is a pipe connected to the fraction pipe, the liquid remaining in the solid cotton dregs generates damp and hot steam under the drying effect of the heat provided by the heat source, and the damp and hot steam is condensed and refluxed to the alcoholysis tank 4 through the channel 14 and the fraction in the distiller 2 at the same time. Therefore, the technical scheme provided by the utility model not only accomplished the drying process of solid cotton dregs, further with remaining ethylene glycol composition recovery in the cotton dregs.

In this embodiment, a lower baffle 18 and an upper baffle 17 which is coaxial with the lower baffle 18 and can rotate are fixed at the bottom of the filter 1, a plurality of first sieve holes 121 are radially arranged on the upper baffle 17, and a plurality of second sieve holes 122 corresponding to the first sieve holes 121 are radially arranged on the lower baffle 18; when the upper baffle 17 rotates to the position that the first sieve hole 121 and the second sieve hole 122 are staggered, the bottom of the distiller 2 is closed, and when the upper baffle 17 rotates to the position that the first sieve hole 121 and the second sieve hole 122 are aligned, the bottom of the distiller 2 is opened; the bottom of distiller 2 is kept open during alcoholysis filtration, and the bottom of distiller 2 is kept closed during distillation and drying; the feed opening 15 remains closed during drying of the solid cotton dregs by the filter 1.

In this embodiment, since the fraction generated by distillation is dissipated upwards, and the filter 1 is disposed at the top of the inner side of the distiller 2, in order to prevent the damp-heat steam from entering the filter 1 to affect the drying process, the first sieve holes and the second sieve holes are dislocated by rotating the upper baffle 17 to close the sieve holes 12 at the bottom of the filter 1, so that the filter 1 and the distiller 2 form relatively independent spaces. The rotation of the upper baffle 17 is driven by a stepping motor (the stepping motor is not marked in the figure), and the stepping motor receives a pulse signal sent by a main electric control system and drives the upper baffle 17 to rotate by a specific angle, so that the first sieve holes 121 of the upper baffle 17 and the second sieve holes 122 of the lower baffle 18 are staggered or aligned. The lower baffle is integrally formed with the bottom of the distiller or is embedded into the bottom of the distiller to be fixedly arranged. The feed inlet 15 is externally connected with a pipeline connected with the alcoholysis tank, and an electric control stop valve is arranged on the pipeline and can receive signals sent by a main electric control system to realize the opening and closing of the feed inlet.

In this embodiment, as shown in fig. 3, the lower baffle 18 is fixed to the bottom of the distiller (for the sake of illustrating the sieve pore structure, the whole structure of the distiller is not fully shown in the drawing), the upper baffle 17 is coaxially disposed with the upper baffle 17 and can rotate at a certain angle under the driving of the stepping motor, the first sieve pores 121 are radially arranged on the upper baffle 17, the lower baffle 18 is also provided with the second sieve pores 122 corresponding to the first sieve pores 121 at the same interval and angle, the upper baffle 17 and the lower baffle 18 are stacked and tightly attached, and then the upper baffle 17 is rotated by the stepping motor, so that the first sieve pores 121 and the second sieve pores 122 are staggered or aligned, thereby realizing the controllable opening and closing of the sieve pores 12 at the bottom of the distiller 2.

In this embodiment, the passage 14 is provided with a stop valve, the stop valve is kept open in the process of drying the solid cotton dregs by the filter 1, and the stop valve is kept closed at other times.

In the embodiment, in order to send the damp and hot steam generated by drying the solid cotton dregs into the condenser 5, the channel 14 connected with the distillation opening 22 is opened in the drying process, so that the distillate in the distiller 2 and the damp and hot steam in the filter 1 are combined and then condensed and refluxed, and the recovery efficiency of the ethylene glycol is improved while cotton dregs fiber is dried. The stop valve can be an electric control stop valve, and the on-off of the switch is realized by receiving a signal sent by a main electric control system.

In this embodiment, the top of the distiller 2 is further provided with a recycling port 16 communicated with the opening on the top surface of the filter 1 for collecting the dried solid cotton dregs. After the drying is completed, the solid cotton dregs in the filter 1 can be collected through the recovery port 16. The top of the recovery port 16 is covered with a sealing cover which can be manually opened by an operator.

In this embodiment, the bottom of the distiller 2 is further provided with a pipeline connected to the regeneration tank 6 to send the distilled alcoholysis product to the regeneration tank 6.

In this embodiment, how to implement the pipe or the channel that can be opened and closed is not specifically described, and those skilled in the art can implement the valve with an appropriate type under the guidance of "industrial valve selection guide" (edited by national chemical equipment design technology center station, etc., first edition of 1 month 2014, chemical industry publishing company).

Example 2

In this embodiment, as shown in fig. 1 and 4, a device for recycling waste polyester cotton is provided, the waste polyester cotton cloth is sent into a crushing device 3, and then a crushing motor is started to crush the waste.

And after the crushing is finished, conveying the recovered waste into the alcoholysis tank 4 through a conveyor belt. Alcoholysis tank 4 contains a large amount of ethylene glycol to extract the polyester-containing components of the comminuted waste material to form an alcoholysate.

Pumping the alcoholysis product into the filter 1, performing solid-liquid separation by using the centrifugal force of the rotary drum 11 in the filter 1, wherein liquid components flow into the distiller 2 through the sieve holes 12, starting the heat source 21 and the fan 131 at the moment, closing the sieve holes 12, so that the drying process in the filter 1 and the distillation process in the distiller 2 are performed simultaneously, and ethylene glycol in the alcoholysis product filtrate in the distiller 2 is evaporated into gas and condensed and refluxed into the alcoholysis tank 4 through the condensation pipe 5; and the moist and hot steam escaping from the solid cotton residue in the drying process is condensed and reflows through the channel 14, so that the recovery of the ethylene glycol is realized. Simultaneously, the ethylene glycol detector 23 simultaneously monitors the ethylene glycol concentration of the remaining alcoholysis filtrate in the still 2, and stops the distillation and drying when it falls to a suitable range. At this time, the solid cotton dregs in the filter 1 can be taken out through the recovery port 16.

After distillation, the alcoholysis product filtrate is conveyed to a regeneration tank 6 through a pipeline 24, a catalyst is added into the regeneration tank and a corresponding reaction environment is provided, so that the recovered product is subjected to polyester reaction, the primary polyester is added after the reaction, the viscosity of the product is increased through a physical method, the quality of the recovered polyester product is improved, the finally generated polyester product is conveyed to a spinning device 7 through a pump for spinning, and the spinning device 7 is a double-screw extruder.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and although the present invention has been disclosed with reference to the above preferred embodiment, but not to limit the present invention, any person skilled in the art can make some changes or modifications to equivalent embodiments without departing from the scope of the present invention, and any simple modification, equivalent change and modification made to the above embodiments by the technical spirit of the present invention still fall within the scope of the present invention.

Claims

1. The utility model provides a device for old and useless polyester-cotton is retrieved, includes crushing equipment (3), alcoholysis pond (4), filter (1), distiller (2), regeneration tank (6) and spinning equipment (7) that link to each other in proper order, wherein alcoholysis pond (4) use ethylene glycol to carry out the alcoholysis to old and useless polyester-cotton, characterized in that, distiller (2) inboard top is located in filter (1), and drying air duct (13) that link to each other with filter (1) inner bag wears out distiller (2) outer wall setting, drying air duct (13) extend to the bottom along distiller (2) outside and link to each other with heat source (21), heat source (21) provide heat for the distillation process of alcoholysis thing in drying of cotton sediment in filter (1) and distiller (2), be equipped with fan (131) near heat source (21) in drying air duct (13), fan (131) operation carries the heat that heat source (21) produced to the solid in filter (1) inner bag through drying air duct (13) And drying the cotton residue to simultaneously perform the drying process and the distillation process.

2. The device for recycling waste polyester-cotton as claimed in claim 1, wherein the top of the filter (1) is arranged corresponding to a feed inlet (15) of an alcoholysis product, the feed inlet (15) is connected with the alcoholysis tank (4), the alcoholysis product enters the inner container of the filter (1) through the feed inlet (15), and a plurality of sieve holes (12) are arranged at the bottom of the inner container of the filter (1) so as to filter liquid components of the alcoholysis product into the distiller (2) and simultaneously leave solid cotton residues in the alcoholysis product in the inner container of the filter (1).

3. The device for recycling waste polyester-cotton as claimed in claim 2, wherein the bottom of the inner container of the filter (1) is connected with a rotating drum (11) driven by a motor (19), the top surface of the rotating drum (11) is provided with an opening corresponding to the alcoholysis substance feed port (15), the side wall and the bottom surface of the rotating drum (11) are provided with a plurality of holes, the motor drives the rotating drum (11) to rotate so as to spin-dry the liquid in the solid cotton dregs of the alcoholysis substance, and the spun-off liquid penetrates through the holes and is combined into the distiller (2) through a sieve hole (12).

4. The device for recycling waste polyester-cotton, according to claim 1, characterized in that a distillation opening (22) is formed in the top of the distiller (2), the distillation opening (22) is communicated with the alcoholysis tank (4) through a condenser (5), and glycol in the alcoholysis product is heated and evaporated under the action of a heat source (21), and then is cooled and refluxed to the alcoholysis tank (4) through the condenser (5), so that the recycling of the glycol is realized.

5. The device for recycling waste polyester-cotton as claimed in claim 4, wherein a detector (23) for detecting the concentration of ethylene glycol is arranged at the bottom of the inner side of the distiller (2), the content of ethylene glycol in the liquid alcoholysis product is controlled by distillation, and the excessive ethylene glycol is condensed and refluxed to the alcoholysis equipment.

6. The device for recycling waste polyester-cotton as claimed in claim 4, wherein a temperature detector (25) for detecting the temperature of the liquid is arranged at the bottom of the inner side of the distiller (2), and the temperature of the liquid is monitored in real time during the distillation process.

7. The device for recycling waste polyester-cotton as claimed in claim 4, characterized in that the top of the liner of the filter (1) is provided with a channel (14) connected with a distillation opening (22) at the top of the distiller (2), so that the steam generated by drying the solid cotton residue enters the condenser (5) through the channel (14) and is cooled and returned to the alcoholysis tank (4).

8. The device for recycling waste polyester cotton according to claim 2 or 3, wherein a lower baffle (18) and an upper baffle (17) which is coaxially arranged with the lower baffle (18) and can rotate are fixed at the bottom of the filter (1), a plurality of first sieve holes (121) are radially arranged on the upper baffle (17), and a plurality of second sieve holes (122) corresponding to the first sieve holes (121) are radially arranged on the lower baffle (18); when the upper baffle plate (17) rotates to the position that the first sieve holes (121) and the second sieve holes (122) are staggered, the bottom of the distiller (2) is closed, and when the upper baffle plate (17) rotates to the position that the first sieve holes (121) and the second sieve holes (122) are aligned, the bottom of the distiller (2) is opened; the bottom of the distiller (2) is kept open during alcoholysis filtration, and the bottom of the distiller (2) is kept closed during distillation and drying; the feed opening (15) is kept closed during the drying of the solid cotton dregs by the filter (1).

9. The device for recycling waste polyester-cotton as claimed in claim 7, wherein the channel (14) is provided with a stop valve, and the stop valve is kept open in the process of drying the solid cotton dregs by the filter (1) and is kept closed at other times.

10. The device for recycling waste polyester-cotton as claimed in claim 1 or 4, wherein the top of the distiller (2) is further provided with a recycling port (16) which is communicated with the opening on the top surface of the filter (1) and is used for collecting dried solid cotton dregs.