CN102443066A - Treatment method of metal impurities in viscose fiber production - Google Patents
Treatment method of metal impurities in viscose fiber production Download PDFInfo
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- CN102443066A CN102443066A CN2011102880816A CN201110288081A CN102443066A CN 102443066 A CN102443066 A CN 102443066A CN 2011102880816 A CN2011102880816 A CN 2011102880816A CN 201110288081 A CN201110288081 A CN 201110288081A CN 102443066 A CN102443066 A CN 102443066A
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- CN
- China
- Prior art keywords
- metallic impurity
- soda cellulose
- treatment process
- metal detector
- viscose fiber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000012535 impurity Substances 0.000 title claims abstract description 71
- 238000000034 method Methods 0.000 title claims abstract description 40
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 39
- 239000002184 metal Substances 0.000 title claims abstract description 39
- 229920000297 Rayon Polymers 0.000 title claims abstract description 28
- 238000007380 fibre production Methods 0.000 title abstract description 3
- 239000000835 fiber Substances 0.000 claims abstract description 42
- 239000003513 alkali Substances 0.000 claims abstract description 25
- 229920002678 cellulose Polymers 0.000 claims description 64
- 239000001913 cellulose Substances 0.000 claims description 64
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 60
- 238000010298 pulverizing process Methods 0.000 claims description 33
- 230000005540 biological transmission Effects 0.000 claims description 20
- 239000002002 slurry Substances 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 229920000609 methyl cellulose Polymers 0.000 claims description 6
- 239000001923 methylcellulose Substances 0.000 claims description 6
- 240000007594 Oryza sativa Species 0.000 claims description 2
- 235000007164 Oryza sativa Nutrition 0.000 claims description 2
- 235000009566 rice Nutrition 0.000 claims description 2
- 238000001514 detection method Methods 0.000 abstract description 6
- 230000032683 aging Effects 0.000 abstract 1
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 9
- 238000000227 grinding Methods 0.000 description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 239000003292 glue Substances 0.000 description 4
- 238000005457 optimization Methods 0.000 description 3
- 235000011121 sodium hydroxide Nutrition 0.000 description 3
- 239000012991 xanthate Substances 0.000 description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- ZOOODBUHSVUZEM-UHFFFAOYSA-N ethoxymethanedithioic acid Chemical compound CCOC(S)=S ZOOODBUHSVUZEM-UHFFFAOYSA-N 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 239000004753 textile Substances 0.000 description 2
- 206010000372 Accident at work Diseases 0.000 description 1
- QGJOPFRUJISHPQ-UHFFFAOYSA-N Carbon disulfide Chemical compound S=C=S QGJOPFRUJISHPQ-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 206010033799 Paralysis Diseases 0.000 description 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- 238000004061 bleaching Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000005956 quaternization reaction Methods 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
- 238000002166 wet spinning Methods 0.000 description 1
- -1 xanthate ester Chemical class 0.000 description 1
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 description 1
- 229960001763 zinc sulfate Drugs 0.000 description 1
- 229910000368 zinc sulfate Inorganic materials 0.000 description 1
Landscapes
- Polysaccharides And Polysaccharide Derivatives (AREA)
Abstract
The invention provides a method for treating metal impurities in viscose fiber production, which comprises the steps of squeezing, crushing, metal impurity detection, metal impurity treatment and the like, wherein metal impurities such as a fine crushing rack and the like falling into alkali fibers are timely found out by optimizing the squeezing and crushing process and installing a metal detector connected with a DCS (distributed control system) on a conveying belt conveyed to an aging process.
Description
Technical field
The present invention relates to handle in a kind of the production method of impurity, more particularly, the present invention relates to the treatment process of metallic impurity in a kind of viscose fiber production, belong to field of viscose fiber.
Background technology
Weaving is one of China's important industry; In national economy, account for very big proportion; And viscose rayon filament yarn/weak point silk is the indispensable part of whole textile industry; So how to improve viscose rayon filament yarn/weak point silk continuous and stable production degree, reduce industrial accident, raise labour productivity, reduce production costs, also be the only way which must be passed of textile industry industrial upgrading.
Viscose fiber is by alpha-cellulose (being called pulp); Handle the generation soda cellulose with caustic soda, it is fine to be called for short alkali, and the alkali fibre is handled through dithiocarbonic anhydride and obtained orange-yellow sodium cellulose xanthate; Be dissolved in the diluted sodium hydroxide solution again; Become heavy-gravity spinning solution (being called viscose glue), viscose glue is after filtration, maturation (placing about 18～30h at a certain temperature, to reduce the Zhi Huadu of cellulose xanthate ester), deaeration; Carry out wet-spinning, precipitation bath is made up of sulfuric acid, sodium sulfate and zinc sulfate.Sodium cellulose xanthate in the viscose glue and the effect of sulfuric acid in the precipitation bath and decompose, cellulose regenerated and separate out, the gained cellulosic fibre becomes viscose fiber after washing, desulfurization, bleaching, drying.
Wherein, Prepare in the process at viscose glue; The preparation of alkali fiber is again one of them important step; Alkali fiber is to generate slurry congee by pulp and caustic soda quaternization, slurry congee pulverize through squeezing machine squeezing, pulverization roller again and experienced drum (case) experienced fall to gather wait and form, the following one yellow operation of alkali fiber entering of generation produced.
And having a great defective in the existing alkali fiber preparation section: alkali fiber is in the squeezing pulverizing process; Because of adopting the soda cellulose disintegrating process; Because the equipment LP moves continuously, various factors causes the broken tooth bar of fine powder to come off and sneaks in the soda cellulose, and accident is comparatively frequent.And soda cellulose delivers into experienced drum (case) through belt after pulverizing through squeezing, because of soda cellulose is in the enclosed environment, is difficult for patrolling and examining discovery, generally gets into the yellow system at soda cellulose and just can reflect, and influence is serious.Gently then discharge up to ten thousand tons of alkali fibres, heavy then operation yellow system device paralysis after causing causes to produce and interrupts, even causes serious security incident.
Summary of the invention
The present invention is intended to solve in the prior art the process of alkali fiber from pulverizing process to experienced operation; The metallic impurity of sneaking into alkali fiber are difficult for finding; The problem that causes subsequent product downgrade and follow-up equipment to break down, provide a kind of viscose fiber produce in the treatment process of metallic impurity, the metallic impurity such as the broken tooth bar of fine powder in the alkali fibre of finding in time to drop; This method can effectively be surveyed and sneak into the metallic impurity of pulverizing the back alkali fiber, and the workman can in time handle it.
In order to realize the foregoing invention purpose, concrete technical scheme of the present invention is following:
The treatment process of metallic impurity during a kind of viscose fiber is produced is characterized in that: comprise following process step:
A, squeezing: use squeezing machine under 45～60 ℃, slurry congee to be squeezed the soda cellulose that obtains hardening;
The speed-frequency of described squeezing machine is: 50～70%;
The weight percent of the methylcellulose content of the said soda cellulose that hardens is 30～35%, and the weight percent of alkalinity is 12～18%;
B, pulverizing: the soda cellulose that hardens that steps A is obtained uses pulverization roller to pulverize, and obtains fluffy soda cellulose in small, broken bits;
Described pulverization roller is three same pulverization rollers that turn to and turn to clockwise, and speed-frequency is 50～90%;
Alkali fiber granularity≤5% of said fluffy soda cellulose in small, broken bits.(in the 100g soda cellulose >=weight percentage of 3mm, be called the alkali fiber granularity, the expression degree of grinding)
The in small, broken bits fluffy soda cellulose that C, step B obtain adopts transmission belt to be transported to experienced equipment, carries out metallic impurity in its process and surveys:
Midpoint at the travelling belt of every 9-12 rice is provided with a metal detector, and the speed control of transmission belt is 0.5～0.7m/s;
Described metal detector and transmission belt be 55-65cm apart from vertical range, the operating frequency of described metal detector is controlled at 400～800KHz.
D, metal detector are reported to the police after detecting metallic impurity, subsequently metallic impurity are handled.
Described metal detector through the DCS system, carries out sound and light alarm after finding to detect metallic impurity;
After operator find that warning light is reported to the police, stop immediately and handle, the artificial metallic impurity that will fall in the soda cellulose are removed, and till the metallic impurity removing in soda cellulose is clean, just drive to rerun.
The useful technique effect that the present invention brings:
1, prior art is when treating the present invention and the problem of metallic impurity occurs, the method that the appearance impurity of employing is cleared up again, and the present invention just began to avoid the appearance of metallic impurity before the step that produces metallic impurity; Back at pulverising step promptly squeezes in the step; Through optimization to pressing temperature and squeezing machine rotating speed; Each item index of the soda cellulose that hardens that obtains is being met on the basis of carrying out next step pulverizing; The metallic impurity of minimizing in expressing process drop, and make follow-up metallic impurity detection operations pressure relieve, survey more accurately fast;
2, the pulverization roller of pulverising step employing of the present invention is three same pulverization rollers that turn to and turn to clockwise; It is thorough more and even to make that like this soda cellulose is pulverized; Tiny soda cellulose and thick metallic impurity are distinguished, help follow-up metallic impurity detection operations more;
3, according to the production characteristics of viscose fiber, the present invention has made accurate optimization to the transmission speed of distribution, installation site and the transmission belt of metal detector, has improved the detection accuracy rate and the efficient of metal detector;
4, adopt the DCS system to carry out sound and light alarm; Improved working efficiency; And make the staff to observe at the scene at any time; Through the warning while of DCS system, again through the DCS system shutdown, the metallic impurity that so just can not cause part to detect transmit experienced equipment in the process of stopping;
5, metallic impurity detection method of the present invention is a treatment process reasonable in design, systematized; Each step closely linked system, formed one complete, mutual auxiliary technical scheme; Before and after surveying metallic impurity, all made process optimization to improve the accuracy rate and the efficient of metal detection; Finally make the metallic impurity more than 99% can be detected and in time handle, guaranteed carrying out smoothly of whole production technology, and the quality of final product.
Embodiment
Embodiment 1
The treatment process of metallic impurity during a kind of viscose fiber is produced is characterized in that: comprise following process step:
A, squeezing: use squeezing machine under 45 ℃, slurry congee to be squeezed the soda cellulose that obtains hardening;
The speed-frequency of described squeezing machine is: 50%;
The weight percent of the methylcellulose content of the said soda cellulose that hardens is 30%, and the weight percent of alkalinity is 12%;
B, pulverizing: the soda cellulose that hardens that steps A is obtained uses pulverization roller to pulverize, and obtains fluffy soda cellulose in small, broken bits;
Described pulverization roller is three same pulverization rollers that turn to and turn to clockwise, and speed-frequency is 50%;
The alkali fiber granularity of said fluffy soda cellulose in small, broken bits is 1%.(in the 100g soda cellulose >=weight percentage of 3mm, be called the alkali fiber granularity, the expression degree of grinding)
The in small, broken bits fluffy soda cellulose that C, step B obtain adopts transmission belt to be transported to experienced equipment, carries out metallic impurity in its process and surveys:
Midpoint at per 9 meters travelling belt is provided with a metal detector, and the speed control of transmission belt is 0.5m/s;
Described metal detector and transmission belt be 55cm apart from vertical range, the operating frequency of described metal detector is controlled at 400KHz.
D, metal detector are reported to the police after detecting metallic impurity, subsequently metallic impurity are handled.
Described metal detector through the DCS system, carries out sound and light alarm after finding to detect metallic impurity;
After operator find that warning light is reported to the police, stop immediately and handle, the artificial metallic impurity that will fall in the soda cellulose are removed, and till the metallic impurity removing in soda cellulose is clean, just drive to rerun.
Embodiment 2
The treatment process of metallic impurity during a kind of viscose fiber is produced is characterized in that: comprise following process step:
A, squeezing: use squeezing machine under 60 ℃, slurry congee to be squeezed the soda cellulose that obtains hardening;
The speed-frequency of described squeezing machine is: 70%;
The weight percent of the methylcellulose content of the said soda cellulose that hardens is 35%, and the weight percent of alkalinity is 18%;
B, pulverizing: the soda cellulose that hardens that steps A is obtained uses pulverization roller to pulverize, and obtains fluffy soda cellulose in small, broken bits;
Described pulverization roller is three same pulverization rollers that turn to and turn to clockwise, and speed-frequency is 90%;
The alkali fiber granularity of said fluffy soda cellulose in small, broken bits is 5%.(in the 100g soda cellulose >=weight percentage of 3mm, be called the alkali fiber granularity, the expression degree of grinding)
The in small, broken bits fluffy soda cellulose that C, step B obtain adopts transmission belt to be transported to experienced equipment, carries out metallic impurity in its process and surveys:
Midpoint at per 12 meters travelling belt is provided with a metal detector, and the speed control of transmission belt is 0.7m/s;
Described metal detector and transmission belt be 65cm apart from vertical range, the operating frequency of described metal detector is controlled at 800KHz.
D, metal detector are reported to the police after detecting metallic impurity, subsequently metallic impurity are handled.
Described metal detector through the DCS system, carries out sound and light alarm after finding to detect metallic impurity;
After operator find that warning light is reported to the police, stop immediately and handle, the artificial metallic impurity that will fall in the soda cellulose are removed, and till the metallic impurity removing in soda cellulose is clean, just drive to rerun.
Embodiment 3
The treatment process of metallic impurity during a kind of viscose fiber is produced is characterized in that: comprise following process step:
A, squeezing: use squeezing machine under 52.5 ℃, slurry congee to be squeezed the soda cellulose that obtains hardening;
The speed-frequency of described squeezing machine is: 60%;
The weight percent of the methylcellulose content of the said soda cellulose that hardens is 32.5%, and the weight percent of alkalinity is 15%;
B, pulverizing: the soda cellulose that hardens that steps A is obtained uses pulverization roller to pulverize, and obtains fluffy soda cellulose in small, broken bits;
Described pulverization roller is three same pulverization rollers that turn to and turn to clockwise, and speed-frequency is 70%;
The alkali fiber granularity of said fluffy soda cellulose in small, broken bits is 3%.(in the 100g soda cellulose >=weight percentage of 3mm, be called the alkali fiber granularity, the expression degree of grinding)
The in small, broken bits fluffy soda cellulose that C, step B obtain adopts transmission belt to be transported to experienced equipment, carries out metallic impurity in its process and surveys:
Midpoint at per 10.5 meters travelling belt is provided with a metal detector, and the speed control of transmission belt is 0.6m/s;
Described metal detector and transmission belt be 60cm apart from vertical range, the operating frequency of described metal detector is controlled at 600KHz.
D, metal detector are reported to the police after detecting metallic impurity, subsequently metallic impurity are handled.
Described metal detector through the DCS system, carries out sound and light alarm after finding to detect metallic impurity;
After operator find that warning light is reported to the police, stop immediately and handle, the artificial metallic impurity that will fall in the soda cellulose are removed, and till the metallic impurity removing in soda cellulose is clean, just drive to rerun.
Embodiment 4
The treatment process of metallic impurity during a kind of viscose fiber is produced is characterized in that: comprise following process step:
A, squeezing: use squeezing machine under 49 ℃, slurry congee to be squeezed the soda cellulose that obtains hardening;
The speed-frequency of described squeezing machine is: 68%;
The weight percent of the methylcellulose content of the said soda cellulose that hardens is 32%, and the weight percent of alkalinity is 13%;
B, pulverizing: the soda cellulose that hardens that steps A is obtained uses pulverization roller to pulverize, and obtains fluffy soda cellulose in small, broken bits;
Described pulverization roller is three same pulverization rollers that turn to and turn to clockwise, and speed-frequency is 79%;
The alkali fiber granularity of said fluffy soda cellulose in small, broken bits is 4%.(in the 100g soda cellulose >=weight percentage of 3mm, be called the alkali fiber granularity, the expression degree of grinding)
The in small, broken bits fluffy soda cellulose that C, step B obtain adopts transmission belt to be transported to experienced equipment, carries out metallic impurity in its process and surveys:
Midpoint at per 11 meters travelling belt is provided with a metal detector, and the speed control of transmission belt is 0.65m/s;
Described metal detector and transmission belt be 57cm apart from vertical range, the operating frequency of described metal detector is controlled at 550KHz.
D, metal detector are reported to the police after detecting metallic impurity, subsequently metallic impurity are handled.
Described metal detector through the DCS system, carries out sound and light alarm after finding to detect metallic impurity;
After operator find that warning light is reported to the police, stop immediately and handle, the artificial metallic impurity that will fall in the soda cellulose are removed, and till the metallic impurity removing in soda cellulose is clean, just drive to rerun.
Claims (8)
1. the treatment process of metallic impurity during a viscose fiber is produced is characterized in that: comprise following process step:
A, squeezing: use squeezing machine under 45～60 ℃, slurry congee to be squeezed the soda cellulose that obtains hardening; The speed-frequency of described squeezing machine is 50～70%;
B, pulverizing: the soda cellulose that hardens that steps A is obtained uses pulverization roller to pulverize, and obtains fluffy soda cellulose in small, broken bits;
The in small, broken bits fluffy soda cellulose that C, step B obtain adopts transmission belt to be transported to experienced equipment, carries out metallic impurity in its process and surveys:
Midpoint at the travelling belt of every 9-12 rice is provided with a metal detector, and the speed control of transmission belt is 0.5～0.7m/s;
D, metal detector are reported to the police after detecting metallic impurity, subsequently metallic impurity are handled.
2. the treatment process of metallic impurity during a kind of viscose fiber according to claim 1 is produced is characterized in that: the weight content at the methylcellulose of the soda cellulose that hardens described in the steps A is 30～35%, and containing the alkali weight percent is 15～20%.
3. the treatment process of metallic impurity during a kind of viscose fiber according to claim 1 is produced, it is characterized in that: at the pulverization roller described in the step B is three same pulverization rollers that turn to and turn to clockwise.
4. according to the treatment process of metallic impurity in claim 1 or the 3 described a kind of viscose fibers productions, it is characterized in that: the speed-frequency of described pulverization roller is 50～90%.
5. the treatment process of metallic impurity during a kind of viscose fiber according to claim 1 is produced is characterized in that: at alkali fiber granularity≤5% of fluffy soda cellulose in small, broken bits described in the step B.
6. the treatment process of metallic impurity during a kind of viscose fiber according to claim 1 is produced, it is characterized in that: is 55-65cm at metal detector described in the step C and transmission belt apart from vertical range.
7. according to the treatment process of metallic impurity in claim 1 or the 6 described a kind of viscose fibers productions, it is characterized in that: the operating frequency of described metal detector is controlled at 400～800KHz.
8. the treatment process of metallic impurity during a kind of viscose fiber according to claim 1 is produced is characterized in that: after the metal detector described in the step D finds to detect metallic impurity, through the DCS system, carry out sound and light alarm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102880816A CN102443066A (en) | 2011-09-26 | 2011-09-26 | Treatment method of metal impurities in viscose fiber production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102880816A CN102443066A (en) | 2011-09-26 | 2011-09-26 | Treatment method of metal impurities in viscose fiber production |
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| Publication Number | Publication Date |
|---|---|
| CN102443066A true CN102443066A (en) | 2012-05-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011102880816A Pending CN102443066A (en) | 2011-09-26 | 2011-09-26 | Treatment method of metal impurities in viscose fiber production |
Country Status (1)
| Country | Link |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201454645U (en) * | 2009-06-02 | 2010-05-12 | 上海宝田新型建材有限公司 | Slag vertical mill device for preventing metal foreign bodies from entering |
| CN102041565A (en) * | 2010-08-24 | 2011-05-04 | 宜宾海丝特纤维有限责任公司 | Method for manufacturing viscose fibers by ultrasonic polymerization reduction of wood-cotton composite pulp |
-
2011
- 2011-09-26 CN CN2011102880816A patent/CN102443066A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201454645U (en) * | 2009-06-02 | 2010-05-12 | 上海宝田新型建材有限公司 | Slag vertical mill device for preventing metal foreign bodies from entering |
| CN102041565A (en) * | 2010-08-24 | 2011-05-04 | 宜宾海丝特纤维有限责任公司 | Method for manufacturing viscose fibers by ultrasonic polymerization reduction of wood-cotton composite pulp |
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Application publication date: 20120509 |