CN219793350U - Reclaimed water washing liquid and neutralization liquid recycling system in para-aramid spinning production - Google Patents
Reclaimed water washing liquid and neutralization liquid recycling system in para-aramid spinning production Download PDFInfo
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- CN219793350U CN219793350U CN202321113979.4U CN202321113979U CN219793350U CN 219793350 U CN219793350 U CN 219793350U CN 202321113979 U CN202321113979 U CN 202321113979U CN 219793350 U CN219793350 U CN 219793350U
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- 239000007788 liquid Substances 0.000 title claims abstract description 349
- 238000005406 washing Methods 0.000 title claims abstract description 285
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 217
- 238000009987 spinning Methods 0.000 title claims abstract description 20
- 229920003235 aromatic polyamide Polymers 0.000 title claims abstract description 19
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
- 238000004064 recycling Methods 0.000 title claims abstract description 10
- 238000006386 neutralization reaction Methods 0.000 title claims description 200
- 239000003513 alkali Substances 0.000 claims abstract description 35
- 230000003472 neutralizing effect Effects 0.000 claims abstract description 33
- 229920006231 aramid fiber Polymers 0.000 claims abstract description 28
- 239000004760 aramid Substances 0.000 claims abstract description 9
- 230000001105 regulatory effect Effects 0.000 claims description 96
- 239000013505 freshwater Substances 0.000 claims description 32
- 230000003068 static effect Effects 0.000 claims description 30
- 238000002156 mixing Methods 0.000 claims description 25
- 239000000835 fiber Substances 0.000 abstract description 21
- 238000004140 cleaning Methods 0.000 abstract description 15
- 230000002378 acidificating effect Effects 0.000 abstract description 3
- 238000004065 wastewater treatment Methods 0.000 abstract description 3
- 239000000126 substance Substances 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 22
- 238000000034 method Methods 0.000 description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Inorganic materials [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 5
- 238000012544 monitoring process Methods 0.000 description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000012670 alkaline solution Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000007380 fibre production Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
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Abstract
The utility model discloses a recycled washing liquid and neutralizing liquid recycling system in para-aramid spinning production, which comprises aramid fibers conveyed by adopting conveying rollers, wherein a first rinsing machine, a second rinsing machine, a third rinsing machine, a first neutralizing machine and a second neutralizing machine are sequentially arranged in the conveying direction of the aramid fibers, when the aramid fibers pass through the first rinsing machine, the second rinsing machine and the third rinsing machine, water washing liquid is sprayed by nozzles in the rinsing machine so as to carry out rinsing on the aramid fibers, and when the aramid fibers pass through the first neutralizing machine and the second neutralizing machine, alkali liquid is sprayed by the nozzles in the neutralizing machine so as to neutralize acidic substances on the surfaces of the aramid fibers. The utility model carries out reverse washing on the fiber in the para-aramid spinning production, reduces the consumption of the cleaning liquid, automatically controls a cleaning liquid reverse washing system, improves the utilization rate of the cleaning liquid, can reduce the consumption of the cleaning liquid by about one third, saves the cost and reduces the wastewater treatment capacity of the cleaning liquid.
Description
Technical Field
The utility model belongs to the field of aramid fiber production, and particularly relates to a recycled washing liquid and neutralizing liquid system in para-aramid fiber spinning production.
Background
The fiber-forming aramid fiber in para-aramid spinning production needs to be washed by water, neutralized, cleaned by sulfuric acid in the filament bundle and impurities in the dissolving process, and dried, oiled and wound after the pH value of the fiber is neutralized to 7-8.
In the process of water washing and neutralization of spinning fiber, a large amount of clear water and alkaline solution are used, the pH value needs to be strictly controlled in order to improve the quality and performance stability of the fiber, a large amount of washing liquid needs to be used for washing, the consumption and control of the washing liquid not only influence the quality of the fiber, but also cause the treatment pressure of the washing liquid after washing. Responding to the national environmental protection requirement, carrying out reverse washing on the fiber, reducing the consumption of the cleaning liquid, carrying out automatic control on a cleaning liquid reverse washing system, improving the utilization rate of the cleaning liquid, reducing the consumption of the cleaning liquid by about one third, saving the cost and reducing the wastewater treatment capacity of the cleaning liquid; meanwhile, the automatic control can control the pH value of the fiber more accurately, and stabilize the quality of the fiber.
Disclosure of Invention
The utility model aims to provide a recycling system for washing liquid and neutralizing liquid in para-aramid spinning production.
In order to achieve the above purpose, the present utility model adopts the following scheme:
the utility model provides a reclaimed water washing liquid and neutralization liquid circulation use system in para-position aramid spinning production, including the aramid fiber that adopts the conveying roller to carry, the aramid fiber's direction of delivery is equipped with first rinsing machine in proper order, the second rinsing machine, the third rinsing machine, first neutralizer and second neutralizer, the aramid fiber is through first rinsing machine, the second rinsing machine, when the third rinsing machine, the nozzle in the rinsing machine spouts water washing liquid and thereby wash it, the aramid fiber is through first neutralizer, when the second neutralizer, the nozzle in the neutralization machine sprays alkali lye and thereby carry out neutralization to the acidic material on aramid fiber surface, the trend of water washing liquid and neutralization liquid is opposite and thereby form reverse washing or reverse neutralization with the aramid fiber, all be the series arrangement between first rinsing machine, the second rinsing machine, the third rinsing machine, the water washing liquid outlet of first rinsing machine is through pipeline and water washing liquid collection pump connection, be equipped with two static state on the outlet line of water washing liquid collection pump, static state on the water way, the water washing liquid mixer is connected through water inlet and water mixing tank, the water mixer on the water outlet of static mixer is connected to the water mixer, the fresh water pump connection of water mixer through the water inlet of the water mixer, the water mixer on the water pump connection of the water mixer, the fresh water pump is connected to the water mixer of the water mixer; the neutralization liquid outlet of the first neutralization machine is connected with a neutralization liquid collecting pump through a pipeline, two branches are arranged on an outlet pipeline of the neutralization liquid collecting pump, a neutralization liquid static mixer is arranged on one branch, an alkali liquid inlet of the neutralization liquid static mixer is connected with an alkali liquid pipeline, an outlet of the neutralization liquid static mixer is connected with a neutralization liquid blending tank through a pipeline, an outlet of the neutralization liquid blending tank is connected with a second neutralization machine through a pipeline and a neutralization liquid conveying pump arranged on the pipeline, and the other branch is provided with a neutralization residual washing liquid regulating valve and is connected with a water treatment system.
Further, the water washing liquid outlet of the third water washing machine is connected with the water washing liquid inlet of the second water washing machine through a pipeline and a second water washing pump arranged on the pipeline, the water washing liquid outlet of the second water washing machine is connected with the water washing liquid inlet of the first water washing machine through a pipeline and a first water washing pump arranged on the pipeline, a liquid level meter is arranged in each water washing machine, the liquid level meter of the third water washing machine is interlocked with the second water washing pump, the liquid level meter of the second water washing machine is interlocked with the first water washing pump, and the liquid level meter of the first water washing machine is interlocked with a post-washing water surplus regulating valve.
Further, a water washing liquid flow meter and a water washing liquid regulating valve are arranged on a connecting pipeline of the water washing liquid conveying pump and the third water washing machine, and the water washing liquid flow meter and the water washing liquid regulating valve are connected according to single-loop control so as to regulate the opening degree of the water washing liquid regulating valve according to a flow signal of the water washing liquid flow meter.
Further, the water washing liquid blending tank is provided with a water washing liquid concentration meter, a fresh water regulating valve and a fresh water flowmeter are arranged on a fresh water pipeline, and the water washing liquid concentration meter and the fresh water regulating valve are connected according to single-loop control so as to regulate the opening degree of the fresh water regulating valve according to a concentration signal of the water washing liquid concentration meter.
Further, a post-washing water flowmeter and a post-washing water regulating valve are arranged on a washing liquid inlet pipeline of the washing liquid static mixer, and the post-washing water flowmeter and the post-washing water regulating valve are connected according to single loop control so as to regulate the opening of the post-washing water regulating valve according to flow signals of the post-washing water flowmeter.
Further, the neutralization liquid outlet of the second neutralization machine is connected with the neutralization liquid inlet of the first neutralization machine through a pipeline and a first neutralization pump arranged on the pipeline, a liquid level meter is arranged in each neutralization machine, the liquid level meter of the second neutralization machine is interlocked with the first neutralization pump, and the liquid level meter of the first neutralization machine is interlocked with a residual washing liquid regulating valve after neutralization.
Further, a post-allocation neutralization liquid flow meter and a post-allocation neutralization liquid regulating valve are arranged on the connecting line of the neutralization liquid delivery pump and the second neutralization machine, and the post-allocation neutralization liquid flow meter and the post-allocation neutralization liquid regulating valve are connected according to single-loop control so as to regulate the opening of the post-allocation neutralization liquid regulating valve by using a flow signal of the post-allocation neutralization liquid flow meter.
Further, the neutralization solution preparing tank is provided with a neutralization solution concentration meter, an alkali solution regulating valve and an alkali solution flowmeter are arranged on the alkali solution pipeline, and the neutralization solution concentration meter and the alkali solution regulating valve are connected according to single loop control so as to regulate the opening of the alkali solution regulating valve according to a concentration signal of the neutralization solution concentration meter.
Further, a neutralization liquid inlet pipeline of the neutralization liquid static mixer is provided with a neutralization liquid flow meter and a neutralization liquid regulating valve, and the neutralization liquid flow meter and the neutralization liquid regulating valve are connected according to single-loop control so as to regulate the opening of the neutralization liquid regulating valve by a flow signal of the neutralization liquid flow meter.
Further, the water washing liquid inlet pipeline of the first water washing machine, the water washing liquid inlet pipeline of the second water washing machine and the neutralization liquid inlet pipeline of the first neutralization machine are respectively provided with a flowmeter.
The utility model carries out reverse washing on the fiber in the para-aramid spinning production, reduces the consumption of the cleaning liquid, automatically controls a cleaning liquid reverse washing system, improves the utilization rate of the cleaning liquid, can reduce the consumption of the cleaning liquid by about one third, saves the cost and reduces the wastewater treatment capacity of the cleaning liquid.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
Reference numerals: 1. a first rinsing machine; 2. a first water washing pump; 3. a second rinsing machine; 4. a second water washing pump; 5. a third rinsing machine; 6. A water washing liquid collecting pump; 7. a static mixer for water washing liquid; 8. a water washing liquid blending tank; 9. a water wash delivery pump; 10. a first rinsing machine level gauge; 11. a first washer flow meter; 12. a second rinsing machine level gauge; 13. a second washer flow meter; 14. a third rinsing machine level gauge; 15. a water wash flowmeter; 16. a water washing liquid regulating valve; 17. a post-wash water flow meter; 18. a post-wash water regulating valve; 19. a fresh water regulating valve; 20. a fresh water flow meter; 21. a post-wash water surplus water regulating valve; 22. a water washing liquid concentration meter; 23. a first neutralizer; 24. a first neutralization pump; 25. a second neutralizer; 26. a neutralization liquid collection pump; 27. a neutralization liquid static mixer; 28. a neutralization solution blending tank; 29. a neutralization liquid delivery pump; 30. a first neutralizer level gauge; 31. a first neutralizer flow meter; 32. a second neutralizer level gauge; 33. a neutralized wash liquor flow meter; 34. a neutralized wash liquor regulating valve; 35. a neutralizing residual washing liquid regulating valve; 36. an alkali solution flowmeter; 37. an alkali liquor regulating valve; 38. a neutralization solution concentration meter; 39. a neutralization solution regulating valve after blending; 40. after deployment, the flow meter was neutralized.
Detailed Description
The utility model is further described below with reference to the accompanying drawings.
Example 1
A cyclic utilization system of reclaimed water washing liquid and neutralization liquid in para-aramid spinning production is shown in figure 1, and comprises aramid fiber conveyed by adopting conveying rollers, wherein a first rinsing machine 1, a second rinsing machine 3, a third rinsing machine 5, a first neutralizing machine 23 and a second neutralizing machine 25 are sequentially arranged in the conveying direction of the aramid fiber, when the aramid fiber passes through the first rinsing machine 1, the second rinsing machine 3 and the third rinsing machine 5, water washing liquid is sprayed by nozzles in the rinsing machines so as to wash the aramid fiber, when the aramid fiber passes through the first neutralizing machine 23 and the second neutralizing machine 25, alkali liquid is sprayed by the nozzles in the neutralizing machine so as to neutralize acidic substances on the surface of the aramid fiber, the trend of the water washing liquid and the neutralizing liquid and the conveying direction of the aramid fiber are opposite so as to form reverse washing or reverse neutralization with the aramid fiber, the first water washing machine 1, the second water washing machine 3 and the third water washing machine 5 are arranged in series, the first neutralization machine 23 and the second neutralization machine 25 are also arranged in series, a water washing liquid outlet of the first water washing machine 1 is connected with a water washing liquid collecting pump 6 through a pipeline, two branches are arranged on an outlet pipeline of the water washing liquid collecting pump 6, a post-washing water flow meter 17, a post-washing water regulating valve 18 and a water washing liquid static mixer 7 are sequentially arranged on one branch, the water washing liquid static mixer 7 is provided with a fresh water inlet, the fresh water inlet of the water washing liquid static mixer 7 is connected with a fresh water pipeline, the fresh water pipeline is provided with a fresh water regulating valve 19 and a fresh water flowmeter 20, an outlet of the water washing liquid static mixer 7 is connected with the water washing liquid regulating tank 8 through a pipeline, an outlet of the water washing liquid regulating tank 8 is connected with the third water washing machine 5 through a water washing liquid conveying pump 9 arranged on the pipeline, the other branch is provided with a post-washing water surplus regulating valve 21 and is connected with a water treatment system; the neutralization liquid outlet of the first neutralization machine 23 is connected with a neutralization liquid collecting pump 26 through a pipeline, two branches are arranged on an outlet pipeline of the neutralization liquid collecting pump 26, a neutralization liquid flow meter 33, a neutralization liquid regulating valve 34 and a neutralization liquid static mixer 27 are sequentially arranged on one branch, the neutralization liquid static mixer 27 is provided with an alkali liquid inlet, an alkali liquid inlet of the neutralization liquid static mixer 27 is connected with an alkali liquid pipeline, an alkali liquid flow meter 36 and an alkali liquid regulating valve 37 are arranged on the alkali liquid pipeline, an outlet of the neutralization liquid static mixer 27 is connected with a neutralization liquid regulating tank 28 through a pipeline, an outlet of the neutralization liquid regulating tank 28 is connected with a second neutralization machine through a pipeline and a neutralization liquid conveying pump 29 arranged on the pipeline, and the other branch is provided with a neutralization liquid regulating valve 35 and is connected with a water treatment system.
The washing liquid outlet of the third washing machine 5 is connected with the washing liquid inlet of the second washing machine 3 through a pipeline and a second washing water pump 4 arranged on the pipeline, the washing liquid outlet of the second washing machine 3 is connected with the washing liquid inlet of the first washing machine 1 through a pipeline and a first washing water pump 2 arranged on the pipeline, the first washing machine 1 is provided with a first washing machine liquid level meter 10, the second washing machine 3 is provided with a second washing machine liquid level meter 12, the third washing machine 5 is provided with a third washing machine liquid level meter 14, the third washing machine liquid level meter 14 is interlocked with the second washing water pump 4, the second washing machine liquid level meter 12 is interlocked with the first washing water pump 2, and the first washing machine liquid level meter 10 is interlocked with a post-washing water surplus water regulating valve 21.
Wherein, the water washing liquid flow meter 15 and the water washing liquid regulating valve 16 are arranged on the connecting lines of the water washing liquid conveying pump 9 and the third water washing machine 5, and the water washing liquid flow meter 15 and the water washing liquid regulating valve 16 are connected according to single-loop control so as to regulate the opening degree of the water washing liquid regulating valve 16 by the flow signal of the water washing liquid flow meter 15.
The washing liquid dispensing tank 8 is provided with a washing liquid concentration meter 22, and the washing liquid concentration meter 22 and the fresh water regulating valve 19 are connected in a single-circuit control manner so as to regulate the opening degree of the fresh water regulating valve 19 by a concentration signal of the washing liquid concentration meter 22.
The post-washing water flow meter 17 and the post-washing water regulating valve 18 are connected according to single loop control so as to regulate the opening degree of the post-washing water regulating valve 18 by a flow signal of the post-washing water flow meter 17.
The neutralization liquid outlet of the second neutralization machine 25 is connected with the neutralization liquid inlet of the first neutralization machine 23 through a pipeline and a first neutralization pump 24 arranged on the pipeline, a first neutralization machine liquid level meter 30 is arranged in the first neutralization machine 23, a second neutralization machine liquid level meter 32 is arranged in the second neutralization machine 25, the second neutralization machine liquid level meter 32 is interlocked with the first neutralization pump 24, and the first neutralization machine liquid level meter 30 is interlocked with a residual washing liquid regulating valve 35 after neutralization.
The connecting line of the neutralization liquid transfer pump 29 and the second neutralization machine 25 is provided with a post-adjustment neutralization liquid flow meter 40 and a post-adjustment neutralization liquid regulating valve 39, and the post-adjustment neutralization liquid flow meter 40 and the post-adjustment neutralization liquid regulating valve 39 are connected according to single-loop control so as to regulate the opening of the post-adjustment neutralization liquid regulating valve 39 by a flow signal of the post-adjustment neutralization liquid flow meter 40.
The neutralization solution preparing tank 28 is provided with a neutralization solution concentration meter 38, and the neutralization solution concentration meter 38 and the alkali liquor regulating valve 37 are connected in a single loop control manner so as to regulate the opening degree of the alkali liquor regulating valve 37 by a concentration signal of the neutralization solution concentration meter 38.
The post-neutralization wash liquid flow meter 33 is connected to the post-neutralization wash liquid regulating valve 34 in a single-circuit control manner so as to regulate the opening degree of the post-neutralization wash liquid regulating valve 34 in accordance with the flow rate signal of the post-neutralization wash liquid flow meter 33.
The first water washing machine 1 is provided with a first water washing machine flowmeter 11 on a water washing liquid inlet pipeline, the second water washing machine 3 is provided with a second water washing machine flowmeter 13 on a neutralization liquid inlet pipeline of the first neutralization machine 23, and the neutralization liquid inlet pipeline of the first neutralization machine is provided with a first neutralization machine flowmeter 31.
When in use, the fiber washing procedure is as follows:
the solidified and molded aramid fiber is subjected to first washing by a first washing machine, the fiber subjected to first washing enters a second washing machine 3 to be subjected to second washing, the fiber subjected to second washing enters a third washing machine 5 to be subjected to third washing, and the fiber subjected to washing enters a neutralizing machine to be subjected to fiber neutralization washing.
The fiber is washed with the washing liquid and the aramid fiber to form reverse washing. The prepared water washing liquid in the water washing liquid preparation tank 8 is conveyed by a water washing liquid conveying pump 9, the using amount of the water washing liquid is automatically controlled by a water washing liquid flowmeter 15 and a water washing liquid regulating valve 16, the fiber is subjected to third water washing, the water washing liquid is collected in a water tank at the bottom of the third water washing machine 5, the liquid level of the third water washing machine 5 is automatically controlled by a second water washing pump 4 and a third water washing machine liquid level meter 14, the liquid level stability of the third water washing machine 5 is ensured, and meanwhile, the flow of the water washing liquid entering the second water washing machine 3 is monitored by a second water washing machine flowmeter 13; the second water washing pump 4 conveys water washing liquid to the second water washing machine 3 for second water washing, the water washing liquid is collected in a water tank at the bottom of the second water washing machine 3, the liquid level of the second water washing machine 3 is automatically controlled through the second water washing pump 4 and the second water washing machine liquid level meter 12, the liquid level of the second water washing machine 3 is ensured to be stable, and meanwhile, the flow of the water washing liquid entering the first water washing machine 1 is monitored through the first water washing machine flowmeter 11; the first washing water pump 2 conveys washing liquid to the first washing machine 1 for first washing, the washing liquid is collected in a water tank at the bottom of the first washing machine 1 and conveyed to the washing liquid blending tank 8 and the water treatment process through the washing liquid collecting pump 6, an outlet pipeline of the washing liquid collecting pump 6 is provided with two branches, one branch is provided with a post-washing water flow meter 17 and a post-washing water regulating valve 18, a set value output signal of the post-washing water flow meter 17 is sent to the post-washing water regulating valve 18, flow is automatically controlled through the post-washing water regulating valve 18, and the washing liquid is conveyed to the washing liquid static mixer 7; the fresh water pipeline for washing and preparing is provided with a fresh water regulating valve 19 and a fresh water flowmeter 20, the fresh water regulating valve 19 and a concentration meter 22 of the washing liquid in the washing liquid preparing tank 8 are automatically controlled and used for automatic preparation and online monitoring of the washing liquid, the fresh water regulated according to the concentration of the washing liquid is conveyed into the washing liquid static mixer 7, and the flow of the fresh water is monitored through the fresh water flowmeter 20; the washed water and fresh water are fully mixed and then are conveyed to a washing liquid blending tank 8, and the washing liquid concentration is determined to be within a control range through fully stirring and mixing and real-time monitoring through a washing liquid concentration meter 22; the prepared washing liquid is conveyed to a third washing machine 5 through a washing liquid conveying pump 9, and the conveyed washing amount is automatically controlled through a washing liquid flowmeter 15 and a washing liquid regulating valve 16, so that thorough washing amount and fiber washing are ensured; the other conveying pipeline of the washing liquid collecting pump 6 is provided with a washing water surplus water regulating valve 21, the washing water surplus water regulating valve 21 and the first washing machine liquid level meter 10 are subjected to interlocking control, and the washing water surplus water is conveyed to the water treatment system, so that the liquid level stability of the first washing machine 1 is ensured.
Fiber neutralization process:
the aramid fiber which is qualified after washing is conveyed to a first neutralizer 23, the fiber which enters the first neutralizer 23 is neutralized and washed by neutralizing liquid of a second neutralizer 25, the neutralizing liquid of the second neutralizer 25 is conveyed to the first neutralizer 23 by a first neutralizing pump 24, the flow of the neutralizing liquid is monitored on line by a first neutralizer flowmeter 31, the first neutralizing pump 24 and a second neutralizer liquid level meter 32 are controlled in an interlocking way, and the stable and controllable liquid level in a collecting tank of the second neutralizer 25 is ensured; and the qualified neutralization solution is fed into a second neutralization machine 25 for neutralization, and the qualified aramid fiber after neutralization is conveyed to the next working procedure for treatment. The neutralization liquid of the first neutralization machine 23 is conveyed to the neutralization liquid blending tank 28 and the water treatment process through the neutralization liquid collecting pump 26, an outlet pipeline of the neutralization liquid collecting pump 26 is provided with two branches, a post-neutralization washing liquid flowmeter 33 and a post-neutralization washing liquid regulating valve 34 are arranged on one branch, a set value of the post-neutralization washing liquid flowmeter 33 outputs a signal to the post-neutralization washing liquid regulating valve 34, the flow is automatically controlled through the post-neutralization washing liquid regulating valve 34, and the neutralization liquid is conveyed to the neutralization liquid static mixer 27; the neutralization and mixing 32wt% alkali liquor (mainly sodium hydroxide solution) pipeline is provided with a 32wt% alkali liquor regulating valve 37 and a 32wt% alkali liquor flowmeter 36, the 32wt% alkali liquor regulating valve 37 and a neutralization liquor concentration meter 38 in the neutralization liquor mixing tank 28 are automatically controlled and used for automatic concentration adjustment and online monitoring of the neutralization washing liquor, the 32wt% alkali liquor regulated according to the concentration of the neutralization liquor is conveyed into a neutralization liquor static mixer 27, and the flow rate of the 32wt% alkali liquor is monitored through the 32wt% alkali liquor flowmeter 36; the neutralization collection liquid and 32 weight percent alkali liquor are fully mixed and then are conveyed to a neutralization solution blending tank 28 for fully stirring and mixing, and the neutralization water concentration is determined to be within a control range by monitoring in real time through a neutralization solution concentration meter 38; the prepared neutralization liquid is conveyed to the second neutralization machine 25 through the neutralization liquid conveying pump 29, and the conveyed neutralization liquid flow is automatically controlled through the prepared neutralization liquid flow meter 40 and the prepared neutralization liquid regulating valve 39, so that the neutralization liquid flow and the fiber neutralization are ensured to be thorough; the other conveying pipeline of the neutralizing liquid collecting pump 26 is provided with a neutralizing residual washing liquid regulating valve 35, the neutralizing residual washing liquid regulating valve 35 and the first neutralizing machine liquid level meter 30 are in interlocking control, and the neutralizing residual neutralizing liquid is conveyed to the water treatment system, and meanwhile the liquid level stability of the first neutralizing machine 23 is ensured.
Finally, it should be noted that: the above examples are provided for illustrating the technical solution of the present utility model and are not to be construed as limiting the present utility model, and it should be understood by those skilled in the art that any equivalent or obvious modification of the embodiments of the present utility model without changing the performance or use thereof without departing from the spirit of the present utility model is intended to be included in the scope of the present utility model as claimed.
Claims (10)
1. The system is characterized by comprising aramid fibers conveyed by adopting conveying rollers, wherein a first rinsing machine, a second rinsing machine, a third rinsing machine, a first neutralizing machine and a second neutralizing machine are sequentially arranged in the conveying direction of the aramid fibers, the first rinsing machine, the second rinsing machine, the third rinsing machine and the first neutralizing machine and the second neutralizing machine are all arranged in series, a rinsing liquid outlet of the first rinsing machine is connected with a rinsing liquid collecting pump through a pipeline, two branches are arranged on an outlet pipeline of the rinsing liquid collecting pump, a rinsing liquid static mixer is arranged on one branch, a fresh water inlet of the rinsing liquid static mixer is connected with a fresh water pipeline, an outlet of the rinsing liquid static mixer is connected with the third rinsing machine through a pipeline, a rinsing liquid conveying pump arranged on the pipeline and a rinsing liquid regulating tank are connected, a post-rinsing surplus water valve is arranged on the other branch and is connected with a water treatment system; the neutralization liquid outlet of the first neutralization machine is connected with a neutralization liquid collecting pump through a pipeline, two branches are arranged on an outlet pipeline of the neutralization liquid collecting pump, a neutralization liquid static mixer is arranged on one branch, an alkali liquid inlet of the neutralization liquid static mixer is connected with an alkali liquid pipeline, an outlet of the neutralization liquid static mixer is connected with a neutralization liquid blending tank through a pipeline, an outlet of the neutralization liquid blending tank is connected with a second neutralization machine through a pipeline and a neutralization liquid conveying pump arranged on the pipeline, and the other branch is provided with a neutralization residual washing liquid regulating valve and is connected with a water treatment system.
2. The recycled system of the reclaimed water washing liquid and the neutralization liquid in the para-aramid spinning production according to claim 1, wherein a water washing liquid outlet of the third water washing machine is connected with a water washing liquid inlet of the second water washing machine through a pipeline and a second water washing pump arranged on the pipeline, a water washing liquid outlet of the second water washing machine is connected with a water washing liquid inlet of the first water washing machine through a pipeline and a first water washing pump arranged on the pipeline, a liquid level meter is arranged in each water washing machine, the liquid level meter of the third water washing machine is interlocked with the second water washing pump, the liquid level meter of the second water washing machine is interlocked with the first water washing pump, and the liquid level meter of the first water washing machine is interlocked with a post-washing water surplus water regulating valve.
3. The recycling system of the reclaimed water washing liquid and the neutralization liquid in the para-aramid spinning production according to claim 1, wherein a water washing liquid flowmeter and a water washing liquid regulating valve are arranged on connecting pipelines of the water washing liquid conveying pump and the third water washing machine, and the water washing liquid flowmeter and the water washing liquid regulating valve are connected according to single loop control so as to regulate the opening degree of the water washing liquid regulating valve according to a flow signal of the water washing liquid flowmeter.
4. The recycling system of the washing liquid and the neutralizing liquid in the para-aramid spinning production according to claim 1, wherein the washing liquid blending tank is provided with a washing liquid concentration meter, a fresh water regulating valve and a fresh water flowmeter are arranged on a fresh water pipeline, and the washing liquid concentration meter and the fresh water regulating valve are connected according to single loop control so as to regulate the opening degree of the fresh water regulating valve according to a concentration signal of the washing liquid concentration meter.
5. The recycling system of reclaimed water washing liquid and neutralization liquid in para-aramid spinning production according to claim 1, wherein a washing liquid inlet pipeline of the washing liquid static mixer is provided with a washing liquid flowmeter and a washing liquid regulating valve, and the washing liquid flowmeter and the washing liquid regulating valve are connected according to single-loop control so as to regulate the opening of the washing liquid regulating valve by a flow signal of the washing liquid flowmeter.
6. The recycled system of the reclaimed water washing liquid and the neutralization liquid in the para-aramid spinning production according to claim 1, wherein the neutralization liquid outlet of the second neutralization machine is connected with the neutralization liquid inlet of the first neutralization machine through a pipeline and a first neutralization pump arranged on the pipeline, a liquid level meter is arranged in each neutralization machine, the liquid level meter of the second neutralization machine is interlocked with the first neutralization pump, and the liquid level meter of the first neutralization machine is interlocked with a residual washing liquid regulating valve after neutralization.
7. The recycling system of the reclaimed water washing liquid and the neutralization liquid in the para-aramid spinning production according to claim 1, wherein a post-blending neutralization liquid flow meter and a post-blending neutralization liquid regulating valve are arranged on a connecting pipe line of the neutralization liquid conveying pump and the second neutralization machine, and the post-blending neutralization liquid flow meter is connected with the post-blending neutralization liquid regulating valve according to single loop control so as to regulate the opening of the post-blending neutralization liquid regulating valve by a flow signal of the post-blending neutralization liquid flow meter.
8. The recycling system of the reclaimed water washing liquid and the neutralization liquid in the para-aramid spinning production according to claim 1, wherein the neutralization liquid blending tank is provided with a neutralization liquid concentration meter, an alkali liquid regulating valve and an alkali liquid flowmeter are arranged on an alkali liquid pipeline, and the neutralization liquid concentration meter and the alkali liquid regulating valve are connected according to single loop control so as to regulate the opening degree of the alkali liquid regulating valve according to a concentration signal of the neutralization liquid concentration meter.
9. The recycled system of the reclaimed water washing liquid and the neutralization liquid in the para-aramid spinning production according to claim 1, wherein a neutralization liquid inlet pipeline of the neutralization liquid static mixer is provided with a neutralization liquid flow meter and a neutralization liquid regulating valve, and the neutralization liquid flow meter and the neutralization liquid regulating valve are connected according to single loop control so as to regulate the opening degree of the neutralization liquid regulating valve by a flow signal of the neutralization liquid flow meter.
10. The recycling system for reclaimed water washing liquid and neutralization liquid in para-aramid spinning production according to claim 1, wherein the water washing liquid inlet pipeline of the first water washing machine, the water washing liquid inlet pipeline of the second water washing machine and the neutralization liquid inlet pipeline of the first neutralization machine are respectively provided with a flowmeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321113979.4U CN219793350U (en) | 2023-05-10 | 2023-05-10 | Reclaimed water washing liquid and neutralization liquid recycling system in para-aramid spinning production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321113979.4U CN219793350U (en) | 2023-05-10 | 2023-05-10 | Reclaimed water washing liquid and neutralization liquid recycling system in para-aramid spinning production |
Publications (1)
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