CN113908965A - Ethyl cellulose crushing and drying method and system - Google Patents
Ethyl cellulose crushing and drying method and system Download PDFInfo
- Publication number
- CN113908965A CN113908965A CN202111353631.8A CN202111353631A CN113908965A CN 113908965 A CN113908965 A CN 113908965A CN 202111353631 A CN202111353631 A CN 202111353631A CN 113908965 A CN113908965 A CN 113908965A
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- China
- Prior art keywords
- ethyl cellulose
- crushing
- drying
- hot air
- pulverizer
- 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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Links
- 239000001856 Ethyl cellulose Substances 0.000 title claims abstract description 54
- ZZSNKZQZMQGXPY-UHFFFAOYSA-N Ethyl cellulose Chemical compound CCOCC1OC(OC)C(OCC)C(OCC)C1OC1C(O)C(O)C(OC)C(CO)O1 ZZSNKZQZMQGXPY-UHFFFAOYSA-N 0.000 title claims abstract description 54
- 229920001249 ethyl cellulose Polymers 0.000 title claims abstract description 54
- 235000019325 ethyl cellulose Nutrition 0.000 title claims abstract description 54
- 238000001035 drying Methods 0.000 title claims abstract description 44
- 239000002184 metal Substances 0.000 claims abstract description 20
- 239000000428 dust Substances 0.000 claims abstract description 16
- 239000012535 impurity Substances 0.000 claims abstract description 3
- 239000000463 material Substances 0.000 claims description 34
- 238000000034 method Methods 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000010298 pulverizing process Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 238000005485 electric heating Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/18—Adding fluid, other than for crushing or disintegrating by fluid energy
- B02C23/24—Passing gas through crushing or disintegrating zone
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
- B02C23/14—Separating or sorting of material, associated with crushing or disintegrating with more than one separator
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
- B04C9/00—Combinations with other devices, e.g. fans, expansion chambers, diffusors, water locks
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/06—Controlling, e.g. regulating, parameters of gas supply
- F26B21/10—Temperature; Pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/06—Controlling, e.g. regulating, parameters of gas supply
- F26B21/12—Velocity of flow; Quantity of flow, e.g. by varying fan speed, by modifying cross flow area
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention relates to the technical field of ethyl cellulose production, in particular to a method for crushing and drying ethyl cellulose; the invention aims to provide an ethyl cellulose crushing and drying method beneficial to improving the whiteness of ethyl cellulose and an ethyl cellulose crushing and drying system. The technical scheme adopted by the invention for solving the technical problems is as follows: the ethyl cellulose crushing and drying method comprises the following steps: A. conveying the cleaned ethyl cellulose to a metal detector to remove the metal impurities; B. introducing hot air into the pulverizer; C. b, crushing the ethyl cellulose treated in the step A in a crusher; D. and drying the crushed ethyl cellulose in a dryer. The ethyl cellulose crushing and drying system comprises a crusher, a dryer, a metal detector, a cyclone and a bag-type dust collector, wherein the metal detector is communicated with the crusher, the dryer, the cyclone and the bag-type dust collector in sequence through a conveying channel.
Description
Technical Field
The invention relates to the technical field of ethyl cellulose production, in particular to a crushing and drying treatment method for ethyl cellulose.
Background
Ethyl cellulose is dried and is mainly dried and then crushed, the method can effectively prevent wet materials from sticking a crusher, the materials are dried and then transferred to the crusher in a certain storage mode, the materials are collected and stored for later use after crushing, and the temperature of the materials is higher than 100 ℃ of discharged moisture during drying. However, ethylcellulose is inferior in heat resistance, and when the ethylcellulose is heated to more than 100 ℃, it is disadvantageous in improving the whiteness of the ethylcellulose.
Disclosure of Invention
The invention aims to provide an ethyl cellulose crushing and drying method beneficial to improving the whiteness of ethyl cellulose and an ethyl cellulose crushing and drying system.
The technical scheme adopted by the invention for solving the technical problems is as follows: the ethyl cellulose crushing and drying method comprises the following steps:
A. conveying the cleaned ethyl cellulose to a metal detector to remove the metal impurities;
B. introducing hot air into the pulverizer;
C. b, crushing the ethyl cellulose treated in the step A in a crusher;
D. and drying the crushed ethyl cellulose in a dryer.
Further, for step B, the flow rate of hot air in the pulverizer was 800m3/h～1100m3/h。
Furthermore, the hot air inlet temperature in the pulverizer is 45 ℃ or 50 ℃.
Further, for the step C, the feeding flow rate of the pulverizer is 180-200 kg/h.
Further, for the step D, the hot air inlet temperature of the dryer is 150 ℃ or 170 ℃.
Further, for step D, the hot air flow of the dryer is 3500m3/h～4200m3/h。
Further, the method also comprises the step E: and conveying the dried ethyl cellulose to a cyclone for drying again.
Further, for steps C to E, the atmospheric pressure in the pulverizer, the dryer, and the cyclone is from-0.01 kpa to-0.03 kpa.
The ethyl cellulose crushing and drying system comprises a crusher, a dryer, a metal detector, a cyclone and a bag-type dust collector, wherein the metal detector is communicated with the crusher, the dryer, the cyclone and the bag-type dust collector in sequence through a conveying channel.
Further, still include the draught fan, the draught fan communicates with the sack cleaner.
The invention has the beneficial effects that: according to the invention, the ethyl cellulose is treated by mainly adopting a mode of crushing firstly and then drying, hot air is fully mixed with wet ethyl cellulose, and the moisture of the wet ethyl cellulose can be taken away by the hot air under the condition that the temperature is not higher than 100 ℃, so that the whiteness of the ethyl cellulose with poor heat resistance can be effectively improved.
Drawings
FIG. 1 is a schematic diagram of a configuration of an ethylcellulose crushing and drying system;
parts, positions and numbers in the drawings: the device comprises a metal detector 1, a pulverizer 2, a dryer 3, a cyclone 4, a bag-type dust collector 5, an induced draft fan 6 and a heat exchanger 7.
Detailed Description
The invention will be further explained with reference to the drawings.
As shown in fig. 1, the ethyl cellulose pulverizing and drying system comprises a pulverizer 2 and a dryer 3, and further comprises a metal detector 1, a cyclone 4 and a bag-type dust collector 5, wherein the metal detector 1 is sequentially communicated with the pulverizer 2, the dryer 3, the cyclone 4 and the bag-type dust collector 5 through conveying channels, a heat exchanger 7 is communicated with the dryer 3, hot air is conveyed to the pulverizer 2 through the heat exchanger 7, and the temperature of the hot air entering the pulverizer 2 can be adjusted through the heat exchanger 7 and a cold air inlet valve.
The method comprises the following steps that materials enter a grinder 2 through a vertical pipe, metal in the materials is detected above the vertical pipe, an automatic three-way valve interlocked with a metal detector 1 is arranged below the vertical pipe, when the metal is detected, the three-way valve automatically discharges the materials containing the metal according to the falling time difference of the materials, and the materials directly fall into the grinder 2 when normal;
the pulverizer 2 is connected with the drying system into a whole, the front of the system is blown inwards by an air blower, the back of the system is blown outwards by an induced draft fan 6, the system is heated by a heat exchanger 7 when being blown, hot air in the whole system flows rapidly and presents a certain negative pressure, the pulverizer 2 divides a small part of hot air, wet materials and the hot air enter the pulverizer 2 together, the pulverizer 2 is prevented from being stuck by low-temperature wet materials, a controllable cold air inlet valve is arranged at the air inlet of the pulverizer 2, the internal temperature of the pulverizer 2 is controlled, and the pre-drying effect before drying is achieved while the materials are pulverized;
the materials are dried immediately after being washed, so that the cost of transferring the materials due to the fact that conventional drying and crushing are separated is avoided, the crushing machine 2 belongs to one part of a system due to the crushing and drying integrated mode, the crushed materials are directly dried, and when the materials are dried, the materials are fully mixed with a large amount of hot air, and the hot air takes away water to dry the materials;
the contact time of hot air and materials is increased by reducing the diameter of a pipeline, increasing a cyclone 4 and changing the direction of the pipeline, the frequency of an air blower and a draught fan 6 is adjusted to control the hot air flow rate of a system, so that the contact time of the materials and the hot air is controlled, the air inlet of the air blower is heated into the hot air by a heat exchanger, the heat exchanger exchanges heat by adopting a steam and/or electric heating mode, the steam opening degree is adjustable, a plurality of groups of electric heating can be independently switched on and off to control the temperature of the hot air entering the system, the temperature is higher when the hot air enters, but is less than 100 ℃ when the hot air contacts the materials;
the bag-type dust collector 5 is arranged in a large material bin, hot air containing a large amount of moisture is discharged out of the system through the bag-type dust collector 5, and dried materials are collected through the bag-type dust collector 5 bin;
hot air and materials of the whole crushing and drying system flow rapidly and show certain negative pressure, the materials are settled in the same negative pressure state in the 5 bins of the bag-type dust collector, and the dried materials are continuously taken out when the fan is turned off.
The washed ethyl cellulose is subjected to metal removal in the material through a metal detector 1, fed into a crusher 2 by means of hot air with a certain temperature, immediately dried after crushing, sufficiently contacted with wet materials by means of hot air during drying to remove moisture in the materials, the contact time and the contact temperature are controllable and adjustable, and finally the dried materials are collected in a large bin through a bag-type dust collector 5.
In order to reduce the resistance of the hot air pipeline, the device also comprises an induced draft fan 6, and the induced draft fan 6 is communicated with the bag-type dust collector 5.
Example 1
The feeding frequency of the crusher is 200kg/h (calculated by dry materials with the moisture content of less than 3 percent), and the hot air flow of the crusher is 1100m3Flow rate of drying hot air is 4200m3The air inlet temperature of hot air is 170 ℃, the air inlet temperature of the pulverizer is 50 ℃, the maximum temperature of the dried ethyl cellulose is 72 ℃, and the pressure of a pulverizing and drying system is-0.03 kpa. The treated ethylcellulose had a moisture content of 1.5% by detection.
Example 2
The feeding frequency of the crusher is 200kg/h (calculated by dry materials with the moisture content of less than 3 percent), and the hot air flow of the crusher is 1000m3Flow rate of hot drying air is 4000m3The air inlet temperature of hot air is 170 ℃, the air inlet temperature of the pulverizer is 50 ℃, the maximum temperature of the dried ethyl cellulose is 75 ℃, and the pressure of a pulverizing and drying system is-0.02 kpa. The treated ethylcellulose had a moisture content of 1.3% by detection.
Example 3
Feeding frequency of the crusher is 180kg/h (calculated by dry materials with moisture content less than 3%), hot air flow of the crusher is 800m3H, drying hot air flow 3500m3The hot air inlet temperature is 150 ℃, the air inlet temperature of the pulverizer is 45 ℃, the maximum temperature of the dried ethyl cellulose is 70 ℃, and the pressure of a pulverizing and drying system is-0.01 kpa.The treated ethylcellulose had a moisture content of 1.4% by detection.
Claims (10)
1. The ethyl cellulose crushing and drying method is characterized by comprising the following steps:
A. conveying the cleaned ethyl cellulose to a metal detector to remove the metal impurities;
B. introducing hot air into the pulverizer;
C. b, crushing the ethyl cellulose treated in the step A in a crusher;
D. and drying the crushed ethyl cellulose in a dryer.
2. The ethyl cellulose crushing and drying method according to claim 1, characterized in that: for step B, the flow of hot air in the pulverizer was 800m3/h～1100m3/h。
3. The ethyl cellulose crushing and drying method according to claim 2, characterized in that: the hot air inlet temperature in the pulverizer is 45 ℃ or 50 ℃.
4. The ethyl cellulose crushing and drying method according to claim 1, characterized in that: and C, feeding the material into the pulverizer at a flow rate of 180-200 kg/h.
5. The ethyl cellulose crushing and drying method according to claim 1, characterized in that: and D, the hot air inlet temperature of the dryer is 150 ℃ or 170 ℃.
6. The ethyl cellulose crushing and drying method according to claim 1, characterized in that: for step D, the hot air flow of the dryer is 3500m3/h～4200m3/h。
7. The ethyl cellulose crushing and drying method according to claim 1, characterized in that: further comprising step E: and conveying the dried ethyl cellulose to a cyclone for drying again.
8. The ethylcellulose crushing and drying method according to claim 7, wherein: for steps C to E, the atmospheric pressure in the pulverizer, dryer, cyclone is-0.01 kpa to-0.03 kpa.
9. Ethyl cellulose crushing and drying system, including rubbing crusher (2) and drying-machine (3), its characterized in that: the metal detector (1) is communicated with the pulverizer (2), the dryer (3), the swirler (4) and the bag-type dust remover (5) in sequence through a conveying channel.
10. The ethylcellulose disintegrating drying system of claim 9, wherein: the bag-type dust collector is characterized by further comprising an induced draft fan (6), wherein the induced draft fan (6) is communicated with the bag-type dust collector (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111353631.8A CN113908965A (en) | 2021-11-16 | 2021-11-16 | Ethyl cellulose crushing and drying method and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111353631.8A CN113908965A (en) | 2021-11-16 | 2021-11-16 | Ethyl cellulose crushing and drying method and system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113908965A true CN113908965A (en) | 2022-01-11 |
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ID=79246496
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111353631.8A Pending CN113908965A (en) | 2021-11-16 | 2021-11-16 | Ethyl cellulose crushing and drying method and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113908965A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4979681A (en) * | 1988-11-25 | 1990-12-25 | Hoechst Aktiengesellschaft | Process for grinding and simultaneous drying of moist cellulose ether products |
| US5921479A (en) * | 1996-10-10 | 1999-07-13 | Clariant Gmbh | Process and apparatus for simultaneously grinding and drying material to be ground containing moist cellulose ether |
| CN1413771A (en) * | 2001-10-26 | 2003-04-30 | 沃尔夫瓦尔斯罗德有限公司 | Method and equipment of combined grinding and drying |
| CN104457199A (en) * | 2014-12-10 | 2015-03-25 | 任会平 | Novel drying set and novel drying method for use in production of sodium carboxymethyl cellulose |
| CN204448230U (en) * | 2015-01-27 | 2015-07-08 | 湖州展望天明药业有限公司 | A kind of HPMC drying and crushing all-in-one of efficient energy-saving |
| CN205607113U (en) * | 2016-05-11 | 2016-09-28 | 河北茂源化工有限公司 | Drying device for cellulose ether |
| CN106496334A (en) * | 2016-11-21 | 2017-03-15 | 泸州北方化学工业有限公司 | A kind of low degree of substitution ethyl cellulose and preparation method thereof |
| CN207951677U (en) * | 2018-01-10 | 2018-10-12 | 河北双牛建材纤维素有限公司 | A kind of cellulose production dedusting material collecting device |
| CN213631193U (en) * | 2020-11-25 | 2021-07-06 | 北方天普纤维素有限公司 | Moisture absorption device is prevented to cellulose ether transportation process |
| CN113182049A (en) * | 2021-03-18 | 2021-07-30 | 曹梦奇 | Ethyl cellulose caking detection method capable of performing refining treatment and classified collection |
-
2021
- 2021-11-16 CN CN202111353631.8A patent/CN113908965A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4979681A (en) * | 1988-11-25 | 1990-12-25 | Hoechst Aktiengesellschaft | Process for grinding and simultaneous drying of moist cellulose ether products |
| US5921479A (en) * | 1996-10-10 | 1999-07-13 | Clariant Gmbh | Process and apparatus for simultaneously grinding and drying material to be ground containing moist cellulose ether |
| CN1413771A (en) * | 2001-10-26 | 2003-04-30 | 沃尔夫瓦尔斯罗德有限公司 | Method and equipment of combined grinding and drying |
| CN104457199A (en) * | 2014-12-10 | 2015-03-25 | 任会平 | Novel drying set and novel drying method for use in production of sodium carboxymethyl cellulose |
| CN204448230U (en) * | 2015-01-27 | 2015-07-08 | 湖州展望天明药业有限公司 | A kind of HPMC drying and crushing all-in-one of efficient energy-saving |
| CN205607113U (en) * | 2016-05-11 | 2016-09-28 | 河北茂源化工有限公司 | Drying device for cellulose ether |
| CN106496334A (en) * | 2016-11-21 | 2017-03-15 | 泸州北方化学工业有限公司 | A kind of low degree of substitution ethyl cellulose and preparation method thereof |
| CN207951677U (en) * | 2018-01-10 | 2018-10-12 | 河北双牛建材纤维素有限公司 | A kind of cellulose production dedusting material collecting device |
| CN213631193U (en) * | 2020-11-25 | 2021-07-06 | 北方天普纤维素有限公司 | Moisture absorption device is prevented to cellulose ether transportation process |
| CN113182049A (en) * | 2021-03-18 | 2021-07-30 | 曹梦奇 | Ethyl cellulose caking detection method capable of performing refining treatment and classified collection |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220111 |
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| RJ01 | Rejection of invention patent application after publication |