CN219218240U - Environment-friendly viscose production system - Google Patents
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- CN219218240U CN219218240U CN202223472585.6U CN202223472585U CN219218240U CN 219218240 U CN219218240 U CN 219218240U CN 202223472585 U CN202223472585 U CN 202223472585U CN 219218240 U CN219218240 U CN 219218240U
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Abstract
The utility model discloses an environment-friendly viscose production system, which comprises an impregnating barrel, a squeezer, an aging machine, a yellowing machine, a dissolving barrel, a ripening barrel, a filtering device, a deaerating machine, a recovered pulp storage tank, a viscose temporary storage tank, a nanofiltration membrane system, an acid wastewater treatment system, a waste glue solution recovery tank and a centrifugal separator, wherein a continuous passage for preparing viscose by taking recovered pulp as a raw material is formed among the recovered pulp storage tank, the impregnating barrel, the squeezer, the aging machine, the yellowing machine, the dissolving barrel, the ripening barrel, the filtering device, the deaerating machine and the viscose temporary storage tank; a continuous path for recycling nanofiltration alkali liquor is formed among the squeezer, the nanofiltration membrane system, the dipping barrel and the acid wastewater treatment system; a continuous passage for recycling the waste glue solution is formed among the filtering device, the waste glue solution recycling tank, the centrifugal separator, the acid wastewater treatment system and the yellowing machine. The method is matched with a production process for preparing the viscose by using the recovered pulp, and the produced viscose meets the spinning requirement, so that the waste utilization is realized, and the emission is reduced.
Description
Technical Field
The utility model relates to a viscose production system, in particular to an environment-friendly viscose production system, and belongs to the field of viscose production.
Background
The production raw materials of the viscose mainly comprise dissolving pulp such as wood pulp, bamboo pulp, cotton pulp and the like, so that the viscose production process has great demands on natural wood/bamboo/cotton and the like. At present, pulp (also called as reclaimed pulp) made of waste cotton/wood cellulose products or cut leftover materials is assumed to be used as a raw material of a viscose production process, so that waste utilization is realized, and waste materials are changed into valuable materials.
However, the recycled pulp has great differences from traditional natural wood/bamboo/cotton, etc., such as: the recovered pulp contains insoluble dead fibers (i.e. chemical fibers of non-biological base fibers) and other impurities, after the recovered pulp is etiolated, viscose microscopic examination is carried out, which is about 30 pieces/g higher than natural wood pulp on average, thus seriously affecting the viscose filtering performance; the recycled pulp has heavy pigment, high ash content and about 50-300 percent higher iron content than the natural pulp, which can accelerate the degradation and polymerization of alkali cellulose, influence the yellowing reaction, the subsequent filtration and the like; and, also lack a compatible production system. Therefore, under the existing viscose production process conditions, the method does not have perfect production conditions.
The prior art CN204644527U aims at providing a recycling system of waste viscose, which makes up the technical blank that the existing waste viscose recycling scheme cannot recycle the waste viscose to be continuously used for viscose filament yarn production, realizes that the waste viscose is directly added into normal viscose after being filtered and enters a viscose mass production system for viscose filament yarn production.
Therefore, there is an urgent need for a stable, compatible production system that prepares viscose using recycled pulp as a raw material.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art and provides an environment-friendly viscose production system. In the technical scheme, the recycled pulp is used as the raw material of the viscose, and the produced viscose meets the spinning requirement by the proposal of a corresponding production system, so that the waste utilization is realized, the emission is reduced, the stability and the sustainability of the viscose production process are ensured, and the large-scale production is met.
In order to achieve the technical purpose, the following technical scheme is provided:
an environment-friendly viscose production system comprises an impregnating barrel, a squeezer, an aging machine, a yellowing machine, a dissolving barrel, a ripening barrel, a filtering device and a defoaming machine, wherein a recovered pulp storage tank is arranged at the front side of a station of the impregnating barrel, and a viscose temporary storage tank is arranged at the rear side of the station of the defoaming machine;
the squeezing alkali liquor outlet of the squeezer is communicated with a nanofiltration membrane system (the accuracy of the nanofiltration membrane is less than or equal to 2 nanometers), the filtered alkali liquor outlet of the nanofiltration membrane system is connected with the dipping barrel, and the concentrated liquor outlet of the nanofiltration membrane system is connected with an acid wastewater treatment system;
the waste glue solution outlet of the filtering device is connected with a waste glue solution recovery tank, and the waste glue solution recovery tank is connected with a desalted water inlet pipe and a sodium hydroxide solution inlet pipe; the waste glue solution recycling tank outlet is connected with a centrifugal separator, the concentrated solution outlet of the centrifugal separator is connected with an acid wastewater treatment system, and the dilute alkali solution outlet of the centrifugal separator is connected with a yellowing machine;
the deaeration machine is connected with an air injection unit;
a continuous passage for preparing the viscose by taking recovered pulp as a raw material is formed among a recovered pulp storage tank, an impregnating barrel, a squeezer, an ageing machine, a yellowing machine, a dissolving barrel, a ageing barrel, a filtering device, a deaerating machine and a viscose temporary storage tank;
a continuous path for recycling nanofiltration alkali liquor is formed among the squeezer, the nanofiltration membrane system, the dipping barrel and the acid wastewater treatment system;
a continuous passage for recycling the waste glue solution is formed among the filtering device, the waste glue solution recycling tank, the centrifugal separator, the acid wastewater treatment system and the yellowing machine.
Preferably, the dipping barrel comprises a first dipping barrel and a second dipping barrel, the squeezer comprises a first squeezer and a second squeezer, the feed inlet of the first dipping barrel is communicated with the feed inlet of the first squeezer, the feed outlet of the first dipping barrel is communicated with the feed inlet of the second dipping barrel, the feed outlet of the second dipping barrel is communicated with the feed inlet of the second squeezer, and the feed outlet of the second squeezer is communicated with the feed inlet of the aging machine; wherein, the squeezing alkali liquor outlet of the first squeezer is communicated with the nanofiltration membrane system, the squeezing alkali liquor outlet of the second squeezer is connected with an alkali liquor filter (180 meshes), and the filtrate outlet of the alkali liquor filter is connected with the first dipping barrel.
Preferably, a pulp porridge pump is arranged between the dipping barrel and the squeezer, two pulp porridge pumps are arranged in parallel, and the pulp porridge pumps are arranged in parallel.
Preferably, the aging machine is a bidirectional spiral aging machine, and the bidirectional spiral aging machine comprises an aging drum body and discharge ports arranged on two opposite sides of the aging drum body, and spiral discharging devices are sleeved in the discharge ports.
Preferably, the rear side of the station of the spiral discharger is provided with a weighing hopper, and the weighing hopper is arranged at the front side of the station of the yellowing machine.
Preferably, the dissolution barrel is internally provided with a coarse grinder, a dissolution barrel discharge port is connected with a ripening barrel feed port through a conveying pipe, a conveying pump, a fine grinder and a heat exchanger are arranged on the conveying pipe, the conveying pump is arranged on the front side of a station of the fine grinder, the heat exchanger is arranged on the rear side of the station of the fine grinder, in addition, the conveying pipe is connected with a dissolution barrel circulation port through a circulating pipe, and the circulating pipe is arranged on the rear side of the station of the heat exchanger.
Preferably, the acid wastewater treatment system is connected with the acid wastewater outlet of the spinning machine, and/or the acid wastewater treatment system is connected with the acid wastewater outlet of the refining machine. The acidic wastewater formed in the spinning process and/or the refining process is discharged to an acidic wastewater treatment system, and then the nanofiltration concentrated solution is used for neutralization treatment, so that the recovery and reutilization of the squeezed alkali liquor are realized.
In this technical scheme, according to actual demand, can set up corresponding governing valve on corresponding conveyer pipe, set up the detector on corresponding equipment, if: a temperature sensor, etc.
The relation of the front side of the station, the rear side of the station, the upper side of the station, the relation of the opposite sides and the like in the technical scheme is defined according to the condition of the actual use state, is a conventional term in the technical field, and is also a conventional term in the actual use process of a worker in the field.
In the description of the present technical solution, it should be noted that, unless explicitly specified and limited otherwise, terms "disposed", "connected" and "connected" should be interpreted broadly, and for example, they may be fixed, removable or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
By adopting the technical scheme, the beneficial effects brought are as follows:
1. in the utility model, a continuous passage for preparing viscose by taking recovered pulp as a raw material is formed among a recovered pulp storage tank, an impregnating barrel, a squeezer, an aging machine, a yellowing machine, a dissolving barrel, a ripening barrel, a filtering device, a defoaming machine and a viscose temporary storage tank, a continuous passage for recycling nanofiltration lye is formed among the squeezer, a nanofiltration membrane system, the impregnating barrel and an acid wastewater treatment system, and a continuous passage for recycling waste lye is formed among the filtering device, a waste lye recycling tank, a centrifugal separator, the acid wastewater treatment system and the yellowing machine, wherein the recovered pulp is taken as a viscose raw material, so that the produced viscose meets spinning requirements (for example, viscose filaments are produced, and yarn indexes can reach national superior standards (GB/T13758-2008)), waste utilization is realized, emission is reduced, the stability and the sustainability of a viscose production process are ensured, and mass production is met, and meanwhile, the continuous passage for recycling waste lye is an important means for solving primary wood pulp and pulp raw materials, and being beneficial to protecting natural environment; and after simple and mature technical treatment is carried out on the squeezed alkali liquor and the waste glue liquor formed in the viscose preparation process, the waste glue liquor is directly recycled in the spinning process, so that emission is reduced, and circular economy is realized;
2. in the utility model, the deaeration machine is connected with the air jet unit, compared with the vacuum steam deaeration in the prior art, the energy consumption can be effectively reduced (for example, the production of 1 ton of viscose solution can save 42kg of steam); the temperature difference in the deaeration machine is increased by about ℃, so that the stability of the subsequent spinning process is improved;
3. in the utility model, the dipping barrel comprises a first dipping barrel and a second dipping barrel, the squeezer comprises a first squeezer and a second squeezer, a pulp porridge pump is arranged between the dipping barrel and the squeezer, the arrangement of equipment can be adjusted according to the process requirement, and the stability and the controllability of the viscose production process are ensured;
4. in the utility model, the aging machine is a bidirectional spiral aging machine, and the bidirectional spiral aging machine comprises an aging drum body and discharge ports arranged on two opposite sides of the aging drum body, wherein spiral discharging devices are sleeved in the discharge ports, so that the materials are discharged in two directions of the aging drum body, and the uniformity of the aging of the materials is improved. The rear side of the station of the spiral discharger is provided with a weighing hopper, the weighing hopper is arranged at the front side of the station of the yellowing machine, and materials entering the yellowing machine are metered, so that the controllability and the stability of the yellowing process are ensured;
5. in the utility model, a coarse grinder is arranged in a dissolution barrel, a discharge hole of the dissolution barrel is connected with a feed hole of a ripening barrel through a conveying pipe, a conveying pump, a fine grinder and a heat exchanger are arranged on the conveying pipe, the conveying pump is arranged at the front side of a station of the fine grinder, the heat exchanger is arranged at the rear side of the station of the fine grinder, in addition, the conveying pipe is connected with a circulation hole of the dissolution barrel through a circulation pipe, and the circulation pipe is arranged at the rear side of the station of the heat exchanger, so that the dissolution efficiency and quality are effectively improved;
6. in the utility model, the acid wastewater treatment system is connected with the acid wastewater outlet of the spinning machine, and/or the acid wastewater treatment system is connected with the acid wastewater outlet of the refiner, namely, the acid wastewater formed in the spinning process and/or the refining process is discharged to the acid wastewater treatment system, and then the nanofiltration concentrated solution is used for neutralization treatment, so that the recovery and reutilization of the squeezed alkali liquor are realized, and the environment-friendly viscose production is improved.
Drawings
FIG. 1 is a block diagram of the structure of the present utility model;
FIG. 2 is a block diagram of the structure of the present utility model;
FIG. 3 is a process flow diagram according to the present utility model;
FIG. 4 is a schematic view (right side view) of an aging machine according to the present utility model;
in the figure, 1, a dipping bucket, 101, a first dipping bucket, 102, a second dipping bucket, 2, a squeezer, 201, a first squeezer, 202, a second squeezer, 3, a two-way spiral aging machine, 31, an aging drum body, 32, a discharge hole, 33, a spiral discharging device, 4, a yellowing machine, 5, a dissolving bucket, 51, a coarse grinder, 6, a aging bucket, 7, a filtering device, 8, a deaeration machine, 9, a reclaimed pulp storage tank, 10, a nanofiltration membrane system, 11, an acidic wastewater treatment system, 12, a waste glue solution recovery tank, 13, a desalted water inlet pipe, 14, a sodium hydroxide solution inlet pipe, 15, a centrifugal separator, 16, an air injection unit, 17, a glue temporary storage tank, 18, a pulp pump, 19, a weighing hopper, 20, a circulation pipe, 21, a conveying pump, 22, a fine grinder, 23, a heat exchanger, 24 and an alkali liquor filter.
Detailed Description
In the following, it is obvious that the embodiments described are only some embodiments of the present utility model, but not all embodiments, by clearly and completely describing the technical solutions in the embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Example 1
As shown in fig. 1: an environment-friendly viscose production system comprises an impregnating barrel 1, a squeezer 2, an ageing machine 3, a yellowing machine 4, a dissolving barrel 5, a ripening barrel 6, a filtering device 7 and a defoaming machine 8, wherein a recovered pulp storage tank 9 is arranged at the front side of a station of the impregnating barrel 1; the squeezing alkali liquor outlet of the squeezer 2 is communicated with a nanofiltration membrane system 10 (the accuracy of the nanofiltration membrane is less than or equal to 2 nanometers), the alkali liquor outlet filtered out by the nanofiltration membrane system 10 is connected with an impregnating vat 1, and the concentrated liquor outlet of the nanofiltration membrane system 10 is connected with an acid wastewater treatment system 11; the waste glue solution outlet of the filtering device 7 is connected with a waste glue solution recovery tank 12, and the waste glue solution recovery tank 12 is connected with a desalted water inlet pipe 13 and a sodium hydroxide solution inlet pipe 14; the outlet of the waste glue solution recovery tank 12 is connected with a centrifugal separator 15, the concentrated solution outlet of the centrifugal separator 15 is connected with an acid wastewater treatment system 11, and the dilute alkali solution outlet of the centrifugal separator 15 is connected with a yellowing machine 4; the deaeration machine 8 is connected with an air injection unit 16; the rear side of the station of the deaeration machine 8 is provided with a viscose temporary storage tank 17;
a continuous passage for preparing viscose by taking recovered pulp as a raw material is formed among a recovered pulp storage tank 9, an impregnating barrel 1, a squeezer 2, an ageing machine 3, a yellowing machine 4, a dissolving barrel 5, a ripening barrel 6, a filtering device 7, a deaerating machine 8 and a viscose temporary storage tank 17; a continuous path for recycling nanofiltration alkali liquor is formed among the squeezer 2, the nanofiltration membrane system 10, the dipping barrel 1 and the acid wastewater treatment system 11; a continuous passage for recycling the waste glue solution is formed among the filtering device 7, the waste glue solution recycling tank 12, the centrifugal separator 15, the acid waste water treatment system 11 and the yellowing machine 4.
Wherein the acid wastewater treatment system 11 is connected with an acid wastewater outlet of the spinning machine, and/or the acid wastewater treatment system 11 is connected with an acid wastewater outlet of the refining machine. The acidic wastewater formed in the spinning process and/or the refining process is discharged to an acidic wastewater treatment system 11, and then the nanofiltration concentrated solution is used for neutralization treatment, so that the recovery and reutilization of the squeezed alkali liquor are realized.
Example 2
On the basis of the embodiment 1, the embodiment further needs the number and arrangement of the dipping barrels 1 and the squeezers 2 according to the process requirement of preparing the viscose by taking the reclaimed pulp as the raw material, so as to further explain the technical scheme.
As in fig. 2-3: the dipping barrel 1 comprises a first dipping barrel 101 and a second dipping barrel 102, the squeezer 2 comprises a first squeezer 201 and a second squeezer 202, a feed inlet of the first dipping barrel 101 is communicated with a feed inlet of the recycling pulp storage tank 9, a feed outlet of the first dipping barrel 101 is communicated with a feed inlet of the first squeezer 201, a feed outlet of the first dipping barrel 201 is communicated with a feed inlet of the second dipping barrel 102, a feed outlet of the second dipping barrel 102 is communicated with a feed inlet of the second squeezer 202, and a feed outlet of the second squeezer 202 is communicated with a feed inlet of the old machine 3;
wherein, the squeeze alkali liquor outlet of the first squeezer 201 is communicated with the nanofiltration membrane system 10, the squeeze alkali liquor outlet of the second squeezer 202 is connected with an alkali liquor filter 24 (180 meshes), and the filtrate outlet of the alkali liquor filter 24 is connected with the first dipping barrel 101. The setting improves the dipping and squeezing effects of materials taking recycled pulp as raw materials, namely improves the polymerization reducing quality, and ensures the subsequent yellowing reaction performance, the viscosity and the filtering performance of the viscose.
Wherein, a pulp porridge pump 18 is arranged between the first dipping barrel 101 and the first squeezer 201, two pulp porridge pumps 18 are arranged, and the pulp porridge pumps 18 are arranged in parallel; likewise, two porridge pumps 18 are arranged between the second dipping barrel 102 and the second squeezer 202, and the porridge pumps 18 are arranged in parallel. The pulp porridge processed by the dipping barrel 1 is smoothly and stably conveyed into the first squeezer 2/the second squeezer 2, so that the sustainability of preparing the viscose by taking the recovered pulp as a raw material is ensured.
Example 3
On the basis of the embodiments 1-2, the present embodiment further requires the aging machine 3 to further explain the present technical solution.
As shown in fig. 4: the aging machine is a bidirectional spiral aging machine 3, the bidirectional spiral aging machine 3 comprises an aging drum body 31 and discharge ports 32 arranged on two opposite sides of the aging drum body 31, and spiral discharging devices 33 are sleeved in the discharge ports 32. This arrangement ensures that the material is discharged to both sides of the aging drum 31, improving the uniformity of the aging of the material. Wherein, the station rear side of spiral discharger 33 is provided with weighing hopper 19, and weighing hopper 19 sets up in the station front side of xanthating machine 4, measures the material that gets into in the xanthating machine 4, and then guarantees the controllability and the stability of xanthating process.
Example 4
On the basis of examples 1-3, this embodiment makes further demands on the arrangement of the dissolution tank 5 to further explain the present technical solution.
The dissolution barrel 5 is internally provided with a coarse grinder 51, a discharge hole of the dissolution barrel 5 is connected with a feed hole of the ripening barrel 6 through a conveying pipe, a conveying pump 21, a fine grinder 22 and a heat exchanger 23 are arranged on the conveying pipe, the conveying pump 21 is arranged on the front side of a station of the fine grinder 22, the heat exchanger 23 is arranged on the rear side of the station of the fine grinder 22, in addition, the conveying pipe is connected with a circulation hole of the dissolution barrel 5 through a circulation pipe 20, and the circulation pipe 20 is arranged on the rear side of the station of the heat exchanger 23. The arrangement effectively improves the dissolution efficiency and quality.
Example 5
Based on examples 1-4, this embodiment uses recycled pulp as raw material, and proposes a production process for preparing viscose by using recycled pulp, so as to further explain this technical scheme.
The method specifically comprises the following steps:
1) Dipping: dipping the directly purchased recovered pulp in a dipping barrel 1 for 50min under the conditions that the concentration of alkali solution is 230g/L and the temperature is 50 ℃, and controlling the concentration of pulp porridge to be 4.2%;
2) And (3) squeezing: the immersed pulp porridge is fed into a squeezer 2 for squeezing, so as to obtain alkali cellulose and squeezed alkali liquid, wherein the content of alpha-fiber in the alkali cellulose is controlled to be 36%, the viscosity is controlled to be 6.5mpa.s, and the subsequent yellowing reaction performance, the viscosity of viscose and the filtering performance are ensured;
conveying the obtained squeezed alkali liquor to a nanofiltration membrane system 10 to obtain nanofiltration alkali liquor and nanofiltration concentrated liquor, wherein the content of hemicellulose in the nanofiltration alkali liquor is controlled to be less than or equal to 4g/L, and recycling the nanofiltration alkali liquor for an impregnation process; the nanofiltration concentrated solution is used for neutralizing acid wastewater generated in the spinning process and the refining process, so that closed-loop utilization of waste lye (nanofiltration lye) is realized;
3) Aging: introducing the obtained alkali cellulose into an aging machine 3 for depolymerization, wherein the constant temperature in the aging machine 3 is controlled to be 40 ℃, the humidity is controlled to be 60%, and the conveying wind temperature of the alkali cellulose is controlled to be 20 ℃; oxidizing and degrading cellulose in alkali medium to make the polymerization degree reach the technological requirement, namely, subsequent yellowing, dissolution, filtration and the like;
4) Yellowing: metering the alkali cellulose after the polymerization reduction, then, introducing the alkali cellulose into a yellowing machine 4, and controlling the initial temperature of the yellowing to be 30 ℃ for 50min; then, controlling the temperature to be 29min;
the stirring rotation speed in the yellowing machine 4 adopts the following control program:
0-10min, and controlling the rotating speed of the first section to be 7-12r/min;
10-60min, and controlling the rotating speed of the second section to be 3-6r/min;
60-70min, and controlling the rotating speed of the third section to be 10-15r/min;
70-85min, and controlling the rotating speed of the fourth section to be 16-20r/min;
different rotating speeds are matched in different process stages, so that the yellowing uniformity and the viscose filtering performance can be improved, and the cellulose xanthate is obtained;
wherein CS is 2 The addition amount is calculated as 32 percent of the weight of the alpha-fiber; bringing alkali cellulose into contact with CS 2 Fully reacting to generate cellulose xanthate;
5) Dissolving: introducing cellulose xanthate into a dissolution barrel 5, carrying out coarse grinding (namely, first dissolution) through a coarse grinder 51 in the dissolution barrel 5, then conveying the cellulose xanthate into a fine grinder 22 (the pressure is more than or equal to 10 mpa) through a conveying pump 21 for fine grinding, exchanging heat, then entering the dissolution barrel 5 for dissolution (namely, second dissolution), and controlling the total time of the second dissolution to be 150 minutes to obtain dissolution liquid;
6) Curing: after the dissolving solution is ripened and filtered, continuous defoaming is carried out by adopting normal-temperature air injection, thus obtaining viscose solution which meets the spinning requirement and can be used for mass production of viscose filaments, and the prepared yarn index can reach the national high-quality product standard (GB/T13758-2008);
wherein, the impurities such as cellulose gel particles, dust and the like are removed by filtration; compared with the prior art of vacuum steam deaeration, the normal-temperature air injection can not only effectively reduce energy consumption (for example, taking 1 ton of viscose solution production as an example and saving 42kg of steam), but also increase the temperature difference in the deaeration machine 8 by about ℃ so as to improve the stability of the subsequent spinning process;
the waste glue solution formed in the filtering process is treated as follows:
adding 70% desalted water and 10% 45g/L sodium hydroxide solution into the waste glue solution, and controlling the alkali content in the waste glue solution to be 6%; then, carrying out solid-liquid separation in a centrifugal way to obtain concentrated solution with total solid content less than 40%, wherein the concentrated solution is directly used for neutralizing acid wastewater generated in viscose fiber production (spinning process and refining process); the obtained dilute alkali liquor is directly used for the yellowing process, so that the reutilization of the waste glue solution is realized.
Wherein, the recovered pulp refers to pulp prepared from waste cotton/wood cellulose products or cut leftover materials, and can be directly purchased, and the related indexes are shown in the following table 1.
Claims (9)
1. The utility model provides an environment-friendly viscose production system, includes dipping barrel (1), squeezer (2), ageing machine (3), yellowing machine (4), dissolve bucket (5), ripening bucket (6), filter equipment (7) and deaeration machine (8), its characterized in that: a recovered pulp storage tank (9) is arranged at the front side of the station of the dipping barrel (1);
the squeezing alkali liquor outlet of the squeezer (2) is communicated with a nanofiltration membrane system (10), the filtered alkali liquor outlet of the nanofiltration membrane system (10) is connected with the dipping barrel (1), and the concentrated liquor outlet of the nanofiltration membrane system (10) is connected with an acid wastewater treatment system (11);
the waste glue solution outlet of the filtering device (7) is connected with a waste glue solution recovery tank (12), and the waste glue solution recovery tank (12) is connected with a desalted water inlet pipe (13) and a sodium hydroxide solution inlet pipe (14); the outlet of the waste glue solution recovery tank (12) is connected with a centrifugal separator (15), the concentrated solution outlet of the centrifugal separator (15) is connected with an acid wastewater treatment system (11), and the dilute alkali solution outlet of the centrifugal separator (15) is connected with a yellowing machine (4);
the deaeration machine (8) is connected with an air injection unit (16), and a viscose temporary storage tank (17) is arranged at the rear side of a station of the deaeration machine (8);
a continuous passage for preparing viscose by taking recovered pulp as a raw material is formed among a recovered pulp storage tank (9), an impregnating barrel (1), a squeezer (2), an ageing machine (3), a yellowing machine (4), a dissolving barrel (5), a ripening barrel (6), a filtering device (7), a deaerating machine (8) and a viscose temporary storage tank (17);
a continuous passage for recycling nanofiltration alkali liquor is formed among the squeezer (2), the nanofiltration membrane system (10), the dipping barrel (1) and the acid wastewater treatment system (11);
a continuous passage for recycling the waste glue solution is formed among the filtering device (7), the waste glue solution recycling tank (12), the centrifugal separator (15), the acid wastewater treatment system (11) and the yellowing machine (4).
2. The environment-friendly adhesive production system according to claim 1, wherein: the dipping barrel (1) comprises a first dipping barrel (101) and a second dipping barrel (102), the squeezer (2) comprises a first squeezer (201) and a second squeezer (202), a feed inlet of the first dipping barrel (101) is communicated with a discharge outlet of the recycling pulp storage tank (9), a discharge outlet of the first dipping barrel (101) is communicated with a feed inlet of the first squeezer (201), a discharge outlet of the first dipping barrel (201) is communicated with a feed inlet of the second dipping barrel (102), a discharge outlet of the second dipping barrel (102) is communicated with a feed inlet of the second squeezer (202), and a discharge outlet of the second squeezer (202) is communicated with a feed inlet of the old machine (3); wherein, the squeezing alkali liquor outlet of the first squeezer (201) is communicated with the nanofiltration membrane system (10), the squeezing alkali liquor outlet of the second squeezer (202) is connected with an alkali liquor filter (24), and the filtrate outlet of the alkali liquor filter (24) is connected with the first dipping barrel (101).
3. An environment-friendly adhesive production system according to claim 1 or 2, characterized in that: a porridge pump (18) is arranged between the dipping barrel (1) and the squeezer (2).
4. An environmental protection type viscose production system according to claim 3, characterized in that: the number of the porridge pumps (18) is two, and the porridge pumps (18) are arranged in parallel.
5. The environment-friendly adhesive production system according to claim 1, wherein: in the nanofiltration membrane system (10), the accuracy of the nanofiltration membrane is less than or equal to 2 nanometers.
6. The environment-friendly adhesive production system according to claim 1, wherein: the automatic aging machine is a bidirectional spiral aging machine (3), the bidirectional spiral aging machine (3) comprises an aging drum body (31) and discharge ports (32) arranged on two opposite sides of the aging drum body (31), and spiral discharging devices (33) are sleeved in the discharge ports (32).
7. The environment-friendly adhesive production system according to claim 6, wherein: the rear side of the station of the spiral discharger (33) is provided with a weighing hopper (19), and the weighing hopper (19) is arranged at the front side of the station of the yellowing machine (4).
8. The environment-friendly adhesive production system according to claim 1, wherein: be provided with coarse grinder (51) in dissolving bucket (5), be connected through the conveyer pipe between dissolving bucket (5) discharge gate and ripening bucket (6) feed inlet, be provided with delivery pump (21), finish grinder (22) and heat exchanger (23) on the conveyer pipe, delivery pump (21) set up the station front side at finish grinder (22), heat exchanger (23) set up the station rear side at finish grinder (22), in addition, the conveyer pipe passes through circulating pipe (20) and is connected with dissolving bucket (5) circulation mouth, circulating pipe (20) set up the station rear side at heat exchanger (23).
9. The environment-friendly adhesive production system according to claim 1, wherein: the acid wastewater treatment system (11) is connected with an acid wastewater outlet of the spinning machine, and/or the acid wastewater treatment system (11) is connected with an acid wastewater outlet of the refining machine.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202223472585.6U CN219218240U (en) | 2022-12-26 | 2022-12-26 | Environment-friendly viscose production system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223472585.6U CN219218240U (en) | 2022-12-26 | 2022-12-26 | Environment-friendly viscose production system |
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| CN219218240U true CN219218240U (en) | 2023-06-20 |
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| CN202223472585.6U Active CN219218240U (en) | 2022-12-26 | 2022-12-26 | Environment-friendly viscose production system |
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