CN113373555A - Method for reducing consumption of stock solution sulfonated carbon disulfide - Google Patents
Method for reducing consumption of stock solution sulfonated carbon disulfide Download PDFInfo
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- CN113373555A CN113373555A CN202110664219.1A CN202110664219A CN113373555A CN 113373555 A CN113373555 A CN 113373555A CN 202110664219 A CN202110664219 A CN 202110664219A CN 113373555 A CN113373555 A CN 113373555A
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- carbon disulfide
- reduced
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- stock solution
- loss
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- QGJOPFRUJISHPQ-UHFFFAOYSA-N Carbon disulfide Chemical class S=C=S QGJOPFRUJISHPQ-UHFFFAOYSA-N 0.000 title claims abstract description 216
- 239000011550 stock solution Substances 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000011084 recovery Methods 0.000 claims abstract description 36
- 238000009987 spinning Methods 0.000 claims abstract description 32
- 229920000297 Rayon Polymers 0.000 claims abstract description 10
- 230000009467 reduction Effects 0.000 claims abstract description 8
- 239000010865 sewage Substances 0.000 claims abstract description 8
- 238000001179 sorption measurement Methods 0.000 claims abstract description 7
- 238000006277 sulfonation reaction Methods 0.000 claims abstract description 4
- QGJOPFRUJISHPQ-NJFSPNSNSA-N carbon disulfide-14c Chemical class S=[14C]=S QGJOPFRUJISHPQ-NJFSPNSNSA-N 0.000 claims abstract description 3
- 238000009833 condensation Methods 0.000 claims description 43
- 230000005494 condensation Effects 0.000 claims description 43
- 238000007789 sealing Methods 0.000 claims description 21
- 239000002699 waste material Substances 0.000 claims description 21
- 239000002253 acid Substances 0.000 claims description 13
- 238000007670 refining Methods 0.000 claims description 10
- 230000007613 environmental effect Effects 0.000 claims description 7
- 239000003292 glue Substances 0.000 claims description 7
- 238000005406 washing Methods 0.000 claims description 7
- 238000006477 desulfuration reaction Methods 0.000 claims description 6
- 230000023556 desulfurization Effects 0.000 claims description 6
- 239000007921 spray Substances 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 5
- 230000007797 corrosion Effects 0.000 claims description 5
- 238000005260 corrosion Methods 0.000 claims description 5
- 238000005520 cutting process Methods 0.000 claims description 5
- 229910001220 stainless steel Inorganic materials 0.000 claims description 5
- 239000010935 stainless steel Substances 0.000 claims description 5
- 239000000498 cooling water Substances 0.000 claims description 4
- 239000000835 fiber Substances 0.000 claims description 4
- 238000012423 maintenance Methods 0.000 claims description 4
- 229920000742 Cotton Polymers 0.000 claims description 3
- 229920001967 Metal rubber Polymers 0.000 claims description 3
- 239000004677 Nylon Substances 0.000 claims description 3
- 230000032683 aging Effects 0.000 claims description 3
- 230000008901 benefit Effects 0.000 claims description 3
- 239000011152 fibreglass Substances 0.000 claims description 3
- 239000010985 leather Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 229920001778 nylon Polymers 0.000 claims description 3
- 230000005070 ripening Effects 0.000 claims description 3
- 230000035882 stress Effects 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- 229910002804 graphite Inorganic materials 0.000 claims description 2
- 239000010439 graphite Substances 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 238000005507 spraying Methods 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 238000005498 polishing Methods 0.000 claims 1
- 238000007380 fibre production Methods 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 230000008569 process Effects 0.000 description 4
- 239000007770 graphite material Substances 0.000 description 3
- 239000002351 wastewater Substances 0.000 description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000007872 degassing Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- VUTSITSGGYCKFP-UHFFFAOYSA-J [C+4].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O Chemical compound [C+4].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O VUTSITSGGYCKFP-UHFFFAOYSA-J 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000003113 alkalizing effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 150000004763 sulfides Chemical class 0.000 description 1
- 238000009849 vacuum degassing Methods 0.000 description 1
Images
Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F13/00—Recovery of starting material, waste material or solvents during the manufacture of artificial filaments or the like
- D01F13/02—Recovery of starting material, waste material or solvents during the manufacture of artificial filaments or the like of cellulose, cellulose derivatives or proteins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
- B01D29/03—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements self-supporting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/60—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor integrally combined with devices for controlling the filtration
- B01D29/606—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor integrally combined with devices for controlling the filtration by pressure measuring
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
- Y02P70/62—Manufacturing or production processes characterised by the final manufactured product related technologies for production or treatment of textile or flexible materials or products thereof, including footwear
Abstract
The invention relates to the technical field of viscose fiber production, in particular to a method for reducing consumption of stock solution sulfonated carbon disulfide, which comprises the following steps: 1) the carbon disulfide loss of a stock solution workshop is reduced; 2) carbon disulfide loss of a spinning workshop is reduced; 3) the carbon disulfide adsorption rate of a recovery system of a spinning workshop is improved; 4) reducing carbon disulfide consumption in the sewage treatment system; 5) combining steps 1) to 4) for increasing the sulfonation CS2The utilization rate of (2) and the carbon disulfide consumption are reduced. The invention controls the CS of the stock solution workshop2The dosage of per ton of silk is increased, and the CS is increased2The utilization rate of (2) and the reduction of the stock solution sulfonated CS2Wear and tear, combined with multiple reduction of CS in spinning practice workshop2Increasing CS in wear-out manner2The recovery rate, the influence on the factory environment, the sewage treatment and the social environment is reduced, and the production cost is reduced.
Description
Technical Field
The invention relates to the technical field of viscose fiber production, in particular to a method for reducing consumption of stock solution sulfonated carbon disulfide.
Background
Carbon disulfide (CS)2) The method is one of important raw materials for viscose fiber production, the purity and impurity content of carbon disulfide are generally required to be controlled, the less the dissolved sulfur in the carbon disulfide is required to be, the better the production is, if the dissolved sulfur content in the carbon disulfide is high, various sulfides are increased in the spinning forming process, an acid bath is easily polluted, the color of a strand is easily yellow, and the hand feeling is rough and hard. The viscose fiber production process generally comprises the following steps: adding material, alkalizing, vacuumizing, and adding CS2Sulfonation, dissolution and feeding, wherein the method comprises a stock solution workshop, an acid station workshop, a spinning workshop, a condensation recovery system and a sewage treatment system. Stock solution sulfonation CS2The loss amount is large, so that the CS for ton wire2High in cost, easy to damage production equipment while using waste rubber, high in maintenance cost and environment-friendly.
The patent with publication number CN110876856A discloses a method for condensing and recovering carbon disulfide in viscose fiber production, and proposes to recover CS by a multi-stage condenser, a condensing medium storage tank and a condensing passage2Resources can be saved, equipment is simple, and other carbon disulfide recovery methods except condensation are not involved.
The patent with publication number CN105600857B discloses a degassing treatment process for alkaline wastewater in viscose fiber production, which adopts a vacuum degassing system to carry out degassing treatment on H-containing wastewater2S、CS2The high-concentration alkaline waste water is intensively degassed, has high equipment investment and large energy consumption, and is only used for recovering waste gasCS2Cannot increase CS in production2Utilization rate of (2) and can not reduce sulfonated CS of stock solution2The wear and tear of (2).
Disclosure of Invention
The invention aims to provide a method for reducing consumption of stock solution sulfonated carbon disulfide by controlling CS (carbon disulfide) of a stock solution workshop2The dosage of per ton of silk is increased, and the CS is increased2The utilization rate of (2) and the reduction of the stock solution sulfonated CS2Wear and tear, combined with multiple reduction of CS in spinning practice workshop2Increasing CS in wear-out manner2The recovery rate, reduces the influence on the factory environment, sewage treatment and social environment, reduces the production cost and solves the problems in the background technology.
The invention is realized by the following technical scheme:
a method for reducing consumption of a stock sulfonated carbon disulfide comprising the steps of:
1) the method has the advantages that carbon disulfide loss of a stock solution workshop is reduced, and the specific steps are that the utilization rate of sulfonated carbon disulfide is improved, the ripening degree is slowed down, and the quality fluctuation of finished products is reduced by reducing the addition amount of carbon disulfide in the stock solution workshop and improving the operation parameters or the structure of a KK type filter in the stock solution workshop;
2) reducing carbon disulfide loss in a spinning workshop, wherein the carbon disulfide loss comprises one or more modes of reducing waste silk and waste rubber loss, reducing the head replacement rate, reducing the concentration of refining exhaust carbon disulfide, reducing the concentration of environmental exhaust carbon disulfide or improving the condensation recovery rate; wherein:
the waste silk and waste glue loss is reduced by arranging a spray head in an acid bath in a way of spraying viscose in a dotted mode, so that smooth silk falling is ensured; reducing waste silk and waste glue loss, improving smoothness of cutting roller, cotton dropping hopper, traction roller, two-bath silk separator and silk separating rod, and regulating flow rate of spray heads in acid bath to 14-16m per row3；
The reduction of the head replacement rate is realized by cleaning the spinning head of the spinning device between the spinning and practice cars to improve the spinnability of the fiber and reduce the replacement of the nozzle;
the leather baffles are additionally arranged at the rear end of the refining equipment after washing and at the front end of the desulfurization area, so that the sealing performance between the rear end of the refiner after washing and the desulfurization area is improved, the escape of carbon disulfide gas is reduced, and the concentration of carbon disulfide in refining exhaust air is reduced;
the sulfonated high-concentration carbon disulfide gas is introduced into a condensation recovery system, so that the concentration of the environmental exhaust carbon disulfide is reduced; the condensation recovery rate of the carbon disulfide is improved by arranging a control valve in a condensation recovery system;
3) the carbon disulfide adsorption rate of a recovery system of the spinning workshop is improved by improving the sealing performance of the control valve; the method specifically comprises the following steps: the gear, the cam and the rotating shaft of the control valve are replaced regularly to avoid poor contact of the control valve or lengthen screws in a gas conveying pipeline to eliminate pipeline stress or replace an aging valve to improve maintenance quality or a combined sealing element is adopted to improve one or more of valve quality to improve the sealing property of the control valve so as to improve the adsorption rate of carbon disulfide;
4) carbon disulfide loss in a sewage treatment system is reduced, the carbon disulfide loss is reduced by improving the sealing performance of a control valve, and carbon disulfide escape caused by opening a spinning workshop for multiple times and changing heads is avoided;
5) increasing the sulfonated CS in combination with steps 1) to 4)2The utilization rate of (2) and the carbon disulfide consumption are reduced.
Preferably, in the step 1), the mode for improving the operation parameters of the KK filter, the air pressure control system is adjusted, and the structural mode for improving the KK filter is to replace a filter screen and improve the air tightness of the filter or replace the filter screen or improve the air tightness of the filter.
Preferably, the filter screen is one of a metal rubber filter screen, a nylon filter screen or a metal filter screen.
Preferably, in the step 2), the method for improving the smoothness of the cutting roll, the dropping hopper, the traction roll, the two-bath filament separator and the filament separating rod is grinding or cleaning.
Preferably, in step 2), the high-concentration carbon disulfide gas is introduced into the condensation and recovery system and has the following characteristics: high-concentration carbon disulfide gas generated in the stock solution workshop, the spinning workshop and the acid station is connected into a condensation recovery system, and leaked direct-discharge valves in the stock solution workshop, the spinning workshop and the acid station are sealed blindly, so that the exhaust concentration of the environment is reduced, and the loss of carbon disulfide is reduced.
Preferably, in step 2), the condensation recovery system comprises a pretreatment device, a condensation treatment device and a secondary condensation treatment device, the pretreatment device is set as a long guide pipe for improving heat exchange efficiency, condenser tubes in the condensation treatment device and the secondary condensation treatment device are set as glass fiber reinforced plastics for avoiding scaling, and a cooling water outlet end in the condensation recovery system is provided with a temperature sensor and a pressure sensor.
Preferably, in step 3), the composite sealing member is made of 316L stainless steel or graphite for improving corrosion resistance.
Compared with the prior art, the invention has the beneficial effects that:
1. compared with CN110876856A, the invention reduces CS in the stock solution workshop2The addition amount of (A) improves a KK filter in a stock solution workshop, and increases sulfonated CS2The utilization rate of (2) is reduced, and the CS of a stock solution workshop is reduced2And (4) loss.
2. Compared with CN105600857B, the invention reduces waste silk and waste glue loss, reduces the head changing rate and reduces the CS of refining exhaust air2Concentration and reduction of environmental exhaust CS2Concentration and condensation recovery rate are improved, and CS (carbon monoxide) of spinning workshop is reduced2And (7) wearing.
3. The invention improves the CS of the recovery system of the spinning and practicing workshop by improving the sealing performance of the condensation recovery control valve2Adsorption rate, lowering CS2And (4) loss.
4. The invention improves the tightness of the device by reducing the windowing frequency and reduces the CS in the sewage treatment system2Escape and improve spinnability.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Figure 1 is a schematic view of the process for reducing carbon disulfide consumption according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The present invention will be further described with reference to the following examples.
Example 1:
a method for reducing consumption of a stock sulfonated carbon disulfide comprising the steps of:
stock solution workshop: by reducing CS in the stock solution workshop2The addition to improve the operational parameter adjustment atmospheric pressure control system of KK type filter in the stoste workshop, improve the structural style of KK type filter for change the filter screen and improve the gas tightness of filter or change the filter screen or with improve the gas tightness of filter, wherein: the filter screen with good corrosion resistance is set as one of a metal rubber filter screen, a nylon filter screen or a metal filter screen, so that the sulfonated CS is improved2The utilization rate of the raw materials is reduced, the ripening degree of the product is slowed down, the quality fluctuation of the finished product is reduced, and the CS of a stock solution workshop is reduced2And (4) loss. When stock solution is sulfonated CS2The adding rate is reduced from 290kg/T to 278kg/T, and the adding rate per ton is reduced by 2.4kg/T, when the stock solution is sulfonated CS2When the adding rate is reduced to 265kg/T silk, CS2The loss again decreased by 2.4kg/T filament.
Spinning and practicing a car room: setting the viscose of the spray head in the acid bath tank as punctiform spray to ensure smooth filament dropping, grinding the cutting roller and the noil hopper to cut off burrs, cleaning the traction roller to remove sulfide viscose, improving the smoothness of the two-bath filament separator and the filament separating rod by grinding and washing, avoiding deformation or crack, controlling circulating water, and adjusting the flow rate to 14-16m per row3The filament bundle is made to run along the specified path of the filament guiding disc, and the waste silk and waste glue loss can be reduced. Finally, the waste silk is reduced from 0.26kg/T silk to 0.079kg/T filament, reduced CS20.181kg/T filament was consumed.
The step of reducing the head changing rate is that the spinnerets of the spinning device between spinning practice cars are cleaned to improve the spinnability of the fiber, the number of unplanned heads is reduced from the original average 400 heads/day to 100 heads/day, thereby reducing the windowing frequency and avoiding CS2Escape and decrease of CS20.5kg/T filament was consumed.
Reduction of refining exhaust CS2The concentration steps are that a leather baffle is added at the rear end of the washing of the refiner and the front end of the desulfurization area, the sealing performance of the rear end of the washing of the refiner and the desulfurization area is improved, and CS is reduced2Escape of gas, spinning refining exhaust CS of each wire2The concentration is reduced from 50-400ppm to 10-25ppm, and CS is reduced20.66kg/T filament was lost.
CS for reducing environmental exhaust2The concentration step is that the sulfonated high-concentration CS is added2Gas is connected into a condensation recovery system, and a control valve is arranged in the condensation recovery system to improve CS2The condensation recovery rate is increased from 30.75 percent to 31.97 percent, the concentration of an exhaust tower is reduced from 28.6ppm to 10ppm, and CS is reduced20.45kg/T filament was lost.
Spinning workshop CS2A recovery system: the sealing performance of the condensation recovery control valve is improved, and the method specifically comprises the steps of periodically replacing a gear, a cam and a rotating shaft of the valve to avoid poor contact of the control valve, or lengthening screws in a gas conveying pipeline to eliminate pipeline stress, or replacing an aging valve to improve maintenance quality, or adopting a combined sealing element to improve one or more of the valve quality to improve the sealing performance of the control valve so as to improve the adsorption rate of carbon disulfide. Reduce the influence of pneumatic valve failure, CS2The loss is reduced from 1.78kg/T to 0.18 kg/T.
A sewage treatment system: reduce the carbon disulfide consume through the leakproofness that improves control valve, avoid opening many times and spin the mill and trade the head and cause the carbon disulfide escape between the car, improve fibrous spinnability, reduce CS20.36kg/T filament was lost.
5) Increasing the sulfonated CS by combining the steps 1) to 4)2The utilization rate of (2) and the carbon disulfide consumption are reduced.
Example 2:
this example is the same as example 1 except that: high-concentration carbon disulfide gas generated in a stock solution workshop, a spinning workshop and an acid station is connected into a condensation recovery system, and the leaked direct-discharge valves in the stock solution workshop, the spinning workshop and the acid station are blindly sealed by using sealing components, so that the exhaust concentration of the environment is reduced, the loss of the carbon disulfide is reduced, and a combined sealing element adopted is set to be 316L stainless steel and graphite materials with strong corrosion resistance, so that the CS (carbon sulfate) is enabled to be made of the 316L stainless steel and the graphite materials with strong corrosion resistance2The loss was reduced by 0.31kg/T filament, as in example 1.
Example 3:
this example is the same as example 2 except that: the condensation recovery system comprises a pretreatment device, a condensation treatment device and a secondary condensation treatment device, wherein the pretreatment device is set as a long guide pipe for improving the heat exchange efficiency, condenser tubes in the condensation treatment device and the secondary condensation treatment device are set as glass fiber reinforced plastics for avoiding scaling, a cooling water outlet end in the condensation recovery system is provided with a temperature sensor and an air pressure sensor, and the condensation recovery system is used for improving the steam pressure, the contact area of the steam and fibers and the contact area of the cooling water and CS (carbon fiber)2The contact area of the steam is increased, the condensation effect is improved, and the CS is reduced2The abrasion was 0.42kg/T wire, and the rest was the same as in example 2.
In conclusion, when the stock solution is sulfonated CS2When the addition rate is reduced from 290kg/T to 265kg/T of filaments, the CS2The loss is reduced by 4.8kg/T silk; after the waste silk and waste glue loss is reduced, the CS is reduced20.181kg/T of thread is consumed; when the head-changing rate is reduced, CS2The loss is reduced by 0.5kg/T silk; when spinning refining exhaust CS2After the concentration is reduced from 50-400ppm to 10-25ppm, CS is reduced20.66kg/T silk is lost; when the environmental exhaust CS is reduced2When the concentration and the condensation recovery rate are increased from 30.75 percent to 31.97 percent, the CS is reduced20.45kg/T silk is lost; reduce the influence of pneumatic valve failure, CS2The loss is reduced from 1.78kg/T to 0.18 kg/T; improving the sealing performance of the control valve and reducing the CS20.36kg/T silk is consumed; when a combined sealing element of 316L stainless steel and graphite material, CS2The loss drops by 0.31kg/T silk; when the condensation effect is increased, CS2The loss is reduced by 0.42kg/T silk. Final stock solution sulfonated CS2The loss is reduced from 62.9kg/T filaments to 53.6kg/T filaments on average, and the CS is reduced in total2The consumption of 9.28kg/T silk is reduced by 14.7 percent, and a larger benefit is obtained.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (7)
1. A method for reducing consumption of stock solution sulfonated carbon disulfide is characterized by comprising the following steps: which comprises the following steps:
1) the method has the advantages that carbon disulfide loss of a stock solution workshop is reduced, and the specific steps are that the utilization rate of sulfonated carbon disulfide is improved, the ripening degree is slowed down, and the quality fluctuation of finished products is reduced by reducing the addition amount of carbon disulfide in the stock solution workshop and improving the operation parameters or the structure of a KK type filter in the stock solution workshop;
2) reducing carbon disulfide loss in a spinning workshop, wherein the carbon disulfide loss comprises one or more modes of reducing waste silk and waste rubber loss, reducing the head replacement rate, reducing the concentration of refining exhaust carbon disulfide, reducing the concentration of environmental exhaust carbon disulfide or improving the condensation recovery rate; wherein:
the waste silk and waste glue loss is reduced by arranging a spray head in an acid bath in a way of spraying viscose in a dotted mode, so that smooth silk falling is ensured; reducing waste silk and waste glue loss, improving smoothness of cutting roller, cotton dropping hopper, traction roller, two-bath silk separator and silk separating rod, and regulating flow rate of spray heads in acid bath to 14-16m per row3；
The reduction of the head replacement rate is realized by cleaning the spinning head of the spinning device between the spinning and practice cars to improve the spinnability of the fiber and reduce the replacement of the nozzle;
the leather baffles are additionally arranged at the rear end of the refining equipment after washing and at the front end of the desulfurization area, so that the sealing performance between the rear end of the refiner after washing and the desulfurization area is improved, the escape of carbon disulfide gas is reduced, and the concentration of carbon disulfide in refining exhaust air is reduced;
the sulfonated high-concentration carbon disulfide gas is introduced into a condensation recovery system, so that the concentration of the environmental exhaust carbon disulfide is reduced; the condensation recovery rate of the carbon disulfide is improved by arranging a control valve in a condensation recovery system;
3) the carbon disulfide adsorption rate of a recovery system of the spinning workshop is improved by improving the sealing performance of the control valve; the method specifically comprises the following steps: the gear, the cam and the rotating shaft of the control valve are replaced regularly to avoid poor contact of the control valve or lengthen screws in a gas conveying pipeline to eliminate pipeline stress or replace an aging valve to improve maintenance quality or a combined sealing element is adopted to improve one or more of valve quality to improve the sealing property of the control valve so as to improve the adsorption rate of carbon disulfide;
4) carbon disulfide loss in a sewage treatment system is reduced, the carbon disulfide loss is reduced by improving the sealing performance of a control valve, and carbon disulfide escape caused by opening a spinning workshop for multiple times and changing heads is avoided;
5) combining steps 1) to 4) for increasing the sulfonation CS2The utilization rate of (2) and the carbon disulfide consumption are reduced.
2. The method of claim 1, wherein the method comprises the steps of: in the step 1), the mode of improving the operating parameters of the KK type filter, adjusting the air pressure control system and improving the structural mode of the KK type filter are to replace a filter screen and improve the air tightness of the filter or replace the filter screen or improve the air tightness of the filter.
3. The method of claim 2, wherein the method comprises the steps of: the filter screen is set to be one of a metal rubber filter screen, a nylon filter screen or a metal filter screen.
4. The method of claim 1, wherein the method comprises the steps of: in the step 2), the smoothness of the cutting roller, the cotton dropping hopper, the traction roller, the two-bath silk separator and the silk separating rod is improved by polishing or cleaning.
5. The method of claim 1, wherein the method comprises the steps of: in the step 2), the access of the high-concentration carbon disulfide gas to the condensation recovery system is as follows: high-concentration carbon disulfide gas generated in the stock solution workshop, the spinning workshop and the acid station is connected into a condensation recovery system, and leaked direct-discharge valves in the stock solution workshop, the spinning workshop and the acid station are sealed blindly, so that the exhaust concentration of the environment is reduced, and the loss of carbon disulfide is reduced.
6. The method of claim 5, wherein the carbon disulfide dope is sulfonated to reduce consumption of carbon disulfide: in the step 2), the condensation recovery system comprises a pretreatment device, a condensation treatment device and a secondary condensation treatment device, wherein the pretreatment device is a long guide pipe for improving the heat exchange efficiency, condenser tubes in the condensation treatment device and the secondary condensation treatment device are made of glass fiber reinforced plastics for avoiding scaling, and a temperature sensor and a pressure sensor are arranged at the water outlet end of cooling water in the condensation recovery system.
7. The method of claim 1, wherein the method comprises the steps of: in the step 3), the combined sealing element is made of 316L stainless steel and graphite for improving the corrosion resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110664219.1A CN113373555B (en) | 2021-06-15 | 2021-06-15 | Method for reducing consumption of stock solution sulfonated carbon disulfide |
Applications Claiming Priority (1)
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