CN106349395A - Improving method of acid dispelling device for nitrocotton production - Google Patents
Improving method of acid dispelling device for nitrocotton production Download PDFInfo
- Publication number
- CN106349395A CN106349395A CN201610795586.4A CN201610795586A CN106349395A CN 106349395 A CN106349395 A CN 106349395A CN 201610795586 A CN201610795586 A CN 201610795586A CN 106349395 A CN106349395 A CN 106349395A
- Authority
- CN
- China
- Prior art keywords
- centrifuge
- nitrocotton
- centrifugal machine
- frequency range
- speed
- 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.)
- Pending
Links
- 229920001220 nitrocellulos Polymers 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 13
- 239000002253 acid Substances 0.000 title abstract description 11
- 238000004519 manufacturing process Methods 0.000 title abstract description 11
- 239000002994 raw material Substances 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims 1
- 238000000605 extraction Methods 0.000 abstract description 2
- 239000013072 incoming material Substances 0.000 abstract 1
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 229920000742 Cotton Polymers 0.000 description 4
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000006396 nitration reaction Methods 0.000 description 3
- 229910052717 sulfur Inorganic materials 0.000 description 3
- 239000011593 sulfur Substances 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 229920001131 Pulp (paper) Polymers 0.000 description 1
- 238000010306 acid treatment Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000012065 filter cake Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B17/00—Apparatus for esterification or etherification of cellulose
- C08B17/04—Apparatus for esterification or etherification of cellulose for making cellulose nitrate
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biochemistry (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Centrifugal Separators (AREA)
Abstract
The invention discloses an improving method of an acid dispelling device for nitrocotton production. The improving method includes: when producing special sheet nitrocotton and after a centrifugal machine runs at least half an hour, controlling frequency range of the centrifugal machine to 25-40Hz, wherein rotating speed of the centrifugal machine is 900-1440 r/min correspondingly; in normal production of other nitrocotton, after the centrifugal machine runs at least half an hour, controlling frequency range of the centrifugal machine to 40-50Hz, wherein rotating speed of the centrifugal machine is 1440-1800 r/min; when being half an hour before raw material switching and nonuniform and few in incoming material, controlling frequency range of the centrifugal machine to 10-25Hz, wherein rotating speed of the centrifugal machine is 360-900r/min correspondingly. Adjustment of centrifugal rotating speed is realized through a frequency changer, the improving method is suitable for production of nitrocotton different in working condition and type, acid extraction is improved, service life of the centrifugal machine is prolonged, and the acid dispelling device is simple in structure and convenient to operate.
Description
Technical field
The present invention relates to nitrocotton production field, the improved method driving acid device that particularly a kind of nitrocotton produces.
Background technology
In nitrocotton production process, cotton linter nitrifies machine through u-shaped and u-shaped is nitrified machine in advance and fully reacted with nitre, sulfur nitration mixture
Through centrifuge, nitrocotton is separated with nitre, sulfur nitration mixture more afterwards, nitrocotton enters subsequent processing and processes, nitre, sulfur nitration mixture enter useless
Acid treatment system separating treatment.
The applicant passes through long-term observation and finds: when producing special lamellar nitrocotton, wood pulp, cotton pulp pass through nitrification
Afterwards, enter in high-speed rotation centrifuge, be liable to stick on sieve plate be difficult to promote, cause to be centrifuged machine vibration；When nitrocotton switching
The front half an hour of raw material, when supplied materials is few, supplied materials is uneven, due to material it cannot be guaranteed that continuously and stably entering centrifuge, cause
Centrifuge forms filter cake difficulty, and centrifugation machine vibration is big, causes centrifuge high labor intensive, and the loss of acid is big, safety and environmental protection pressure
Big a series of problems, such as.
Present inventor is devoted to the development of nitrocotton production field, and has applied for that notification number is in 2015
A kind of drive acid device for nitrocotton production of cn201520956816.1, including centrifuge, conduction pipe group, collecting tank；
Described conduction pipe group includes the first pipeline, second pipe, and described first pipeline is connected with centrifuge liquid outlet coupling, described
Second pipe is connected with collecting tank coupling；Also include corrosion resistant perspective pipeline, described corrosion resistant perspective pipeline one end and the first pipeline
Join connection, the other end is connected with second pipe coupling；Also include flow control valve, described flow control valve is arranged on second pipe
And collecting tank between.But, in nitrocotton production process, often encounter the nitrocotton changing different Article Numbers, in this feelings
Because the frequency of this drive acid device of centrifuge under traditional production technology is fixed as 50hz under condition, therefore do not adapt to different works
Condition and variety classes nitrocotton produce.
Content of the invention
On the basis of Chinese patent cn201520956816.1, the present invention provides a kind of nitre for solving above-mentioned technical problem
Change the improved method driving sour device that cotton produces, Chinese patent cn201520956816.1 is used for reference by the present invention.
The technical solution adopted in the present invention is: the improved method driving acid device that a kind of nitrocotton produces, it is special to produce
Lamellar nitrocotton when, and after ensureing that centrifuge at least runs half an hour, control centrifuge frequency range 25hz-40hz, right
Centrifuge speed is answered to be 900r/min-1440r/min,；When normally producing remaining nitrocotton, and ensure that centrifuge at least runs
After half an hour, control centrifuge frequency range 40hz-50hz, corresponding centrifuge speed is 1440r/min-1800r/min；Switching
When the front half an hour of raw material, supplied materials are uneven, supplied materials is few, control centrifuge frequency range 10hz-25hz, corresponding centrifuge speed
For 360r/min-900r/min.
When centrifuge frequency range 40hz-50hz, when corresponding centrifuge speed is 1440r/min-1800r/min, set
For top gear；When centrifuge frequency range 25hz-40hz, when corresponding centrifuge speed is 900r/min-1440r/min, set
For middle speed gear；When centrifuge frequency range 10hz-25hz, when corresponding centrifuge speed is 360r/min-900r/min, it is set as
Bottom gear.
The invention has the beneficial effects as follows: the present invention controls the rotating speed of centrifuge by adjusting converter, is realized respectively with this
Plant different operating modes and variety classes nitrocotton produces, improve the extraction of acid, extend centrifuge service life, safety and environmental protection.
Brief description
Fig. 1 is the frequency changer schematic diagram that the present invention uses.
In figure is labeled as: 1, converter；2nd, switch；3rd, top gear；4th, middle speed gear；5th, bottom gear；.
Specific embodiment
The present invention is further described below in conjunction with the accompanying drawings.
As shown in figure 1, the improved method driving sour device that the present invention is a kind of nitrocotton to be produced, in the electricity connecting centrifuge
Converter 1 is in series with resource loop, converter 1 one end connects power supply, the other end connects centrifuge (not shown), described change
The switch 2 controlling converter is provided with frequency device 1.During production, switch on power, open converter switch 2, produce nitrification when normal
During cotton, operator can control the rotating speed of centrifuge by adjusting converter 1 to top gear 3；When producing lamellar nitrocotton, can lead to
Overregulate the rotating speed that converter 1 to control centrifuge to middle speed gear 4；When producing the nitrocotton that supplied materials is few or supplied materials is uneven, can
Control the rotating speed of centrifuge by adjusting converter 1 to bottom gear 5.
As one kind preferably, top gear (3) frequency is 50hz, and corresponding centrifuge speed is 1800r/min.
As one kind preferably, middle speed gear (4) frequency is 30hz, and corresponding centrifuge speed is 1080r/min.
As one kind preferably, bottom gear (5) frequency is 20hz, and corresponding centrifuge speed is 720r/min.
Claims (3)
1. a kind of nitrocotton produces the improved method driving sour device it is characterised in that: when producing special lamellar nitrocotton, and
And after ensureing that centrifuge at least runs half an hour, controlling centrifuge frequency range 25hz-40hz, corresponding centrifuge speed is
900r/min-1440r/min,；When normally producing remaining nitrocotton, and after ensureing that centrifuge at least runs half an hour, control
Centrifuge frequency range 40hz-50hz, corresponding centrifuge speed is 1440r/min-1800r/min；The first half of switching raw material is little
When, when supplied materials is uneven, supplied materials is few, control centrifuge frequency range 10hz-25hz, corresponding centrifuge speed is 360r/min-
900r/min.
2. a kind of nitrocotton produces as claimed in claim 1 the improved method driving sour device it is characterised in that: described centrifuge
The adjustment of frequency is realized by the converter (1) being arranged on centrifuge electric power loop.
3. a kind of nitrocotton produces as claimed in claim 2 the improved method driving sour device it is characterised in that: when centrifuge frequency
Rate scope 40hz-50hz, when corresponding centrifuge speed is 1440r/min-1800r/min, is set as the top gear of converter
(3)；When centrifuge frequency range 25hz-40hz, when corresponding centrifuge speed is 900r/min-1440r/min, it is set as frequency conversion
The middle speed gear (4) of device；When centrifuge frequency range 10hz-25hz, when corresponding centrifuge speed is 360r/min-900r/min,
It is set as the bottom gear (5) of converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610795586.4A CN106349395A (en) | 2016-08-31 | 2016-08-31 | Improving method of acid dispelling device for nitrocotton production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610795586.4A CN106349395A (en) | 2016-08-31 | 2016-08-31 | Improving method of acid dispelling device for nitrocotton production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106349395A true CN106349395A (en) | 2017-01-25 |
Family
ID=57856348
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610795586.4A Pending CN106349395A (en) | 2016-08-31 | 2016-08-31 | Improving method of acid dispelling device for nitrocotton production |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106349395A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112500500A (en) * | 2020-11-25 | 2021-03-16 | 北方化学工业股份有限公司 | Device and method for recovering residual acid of nitrocellulose |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1436793A (en) * | 2003-03-21 | 2003-08-20 | 泸州北方化学工业有限公司 | Continuous nitrocotton dewatering process and apparatus |
| CN200965629Y (en) * | 2006-11-02 | 2007-10-24 | 中国石化集团胜利石油管理局钻井工艺研究院 | A centrifugal motor current-based closed-loop control system |
| CN102807623A (en) * | 2012-08-17 | 2012-12-05 | 四川北方硝化棉股份有限公司 | Acid removal process for nitrocotton |
| CN204365490U (en) * | 2014-12-26 | 2015-06-03 | 四川北方硝化棉股份有限公司 | Centrifugally drive sour machine pusher spindle nose and hollow shaft head anticorrosion structure |
| CN105234010A (en) * | 2015-09-24 | 2016-01-13 | 四川北方硝化棉股份有限公司 | Nitro-cotton centrifugal machine non-pollution gas exhausting device and production method |
| CN205133476U (en) * | 2015-11-26 | 2016-04-06 | 四川北方硝化棉股份有限公司 | A drive sour device for nitrocotton production |
-
2016
- 2016-08-31 CN CN201610795586.4A patent/CN106349395A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1436793A (en) * | 2003-03-21 | 2003-08-20 | 泸州北方化学工业有限公司 | Continuous nitrocotton dewatering process and apparatus |
| CN200965629Y (en) * | 2006-11-02 | 2007-10-24 | 中国石化集团胜利石油管理局钻井工艺研究院 | A centrifugal motor current-based closed-loop control system |
| CN102807623A (en) * | 2012-08-17 | 2012-12-05 | 四川北方硝化棉股份有限公司 | Acid removal process for nitrocotton |
| CN204365490U (en) * | 2014-12-26 | 2015-06-03 | 四川北方硝化棉股份有限公司 | Centrifugally drive sour machine pusher spindle nose and hollow shaft head anticorrosion structure |
| CN105234010A (en) * | 2015-09-24 | 2016-01-13 | 四川北方硝化棉股份有限公司 | Nitro-cotton centrifugal machine non-pollution gas exhausting device and production method |
| CN205133476U (en) * | 2015-11-26 | 2016-04-06 | 四川北方硝化棉股份有限公司 | A drive sour device for nitrocotton production |
Non-Patent Citations (2)
| Title |
|---|
| 陆斌: "三级推料离心机在硝化纤维素驱酸中的应用", 《过滤与分离》 * |
| 陶渊卿 等: "双级推料离心机在硝化纤维素生产中的应用", 《过滤与分离》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112500500A (en) * | 2020-11-25 | 2021-03-16 | 北方化学工业股份有限公司 | Device and method for recovering residual acid of nitrocellulose |
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| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170125 |
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| RJ01 | Rejection of invention patent application after publication |