CN1250869A - Energy-saving combined high-elasticity cyclone drier - Google Patents
Energy-saving combined high-elasticity cyclone drier Download PDFInfo
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- CN1250869A CN1250869A CN 99119714 CN99119714A CN1250869A CN 1250869 A CN1250869 A CN 1250869A CN 99119714 CN99119714 CN 99119714 CN 99119714 A CN99119714 A CN 99119714A CN 1250869 A CN1250869 A CN 1250869A
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Abstract
The high-elasticity combined energy-saving swirling flow drying equipment includes fan, gas heater, air-flow drier, swirling flow drier, primary cyclone separator, secondary cyclone separator and star feeder, inwhich a fan is connected with gas heater, another fan is connected with gas heater, the cyclone separator is set up between air-flow drier and swirling flow drier, and the star feeder is set up between the primary cyclone separator and swirling flow separator. Said invention is high in drying efficiency, low in energy consumption, and its operation elasticity is large.
Description
The present invention relates to a kind of energy-saving combined high-elasticity cyclone drier.
Commonly used contain the wet stock drying mode and equipment has various ways, the simplest is chamber dryer, drying is only skimmed on the wet stock surface in pallet with air or specific gas, mass transfer, rate of heat transfer are low, required drying time is long, and can only carry out intermittently operated, energy consumption is big in material handling and start-stop car process.
Contain wet stock and under suspended state, contact if make with drying medium, conduct heat, mass transfer operation, not only can under continuous or semicontinuous state, operate, can obtain the stable product of water capacity, and will improve heat transfer, mass-transfer efficiency greatly, cut down the consumption of energy significantly.
Contain wet stock suspension drying means the dilute phase pneumatic conveying drying is arranged, the concentrated phase fluidized bed drying, the pasty material of high water capacity then adopts spray-drying, in addition, for remedying too short defective of the material to be dried time of staying, the use that generally also several equipment combined is to satisfy the requirement to the finished product materials water capacity.As horizontal multicompartment fluidized bed dryer, or dilute phase pneumatic conveying drying and concentrated phase fluidized bed drying united use, in addition, another kind of combined drying device has also appearred in recent years, be the combined dryer of pneumatic conveying drying and cyclone drying or cyclone drying, the patent (patent No.: 93219974.7) combined efficient power-saving rotary flow desiccator of the MST cyclone drying device of succeeding in developing as German Hoechst AG and the applicant's application.
MST cyclone drying device as shown in Figure 1, its characteristics are: pneumatic conveyer dryer (4) and cyclone dryer (6) are for being connected in series, drying medium and material remain and flow contact, drying medium and wet stock to be dried are sent into by pneumatic conveyer dryer (4) bottom, tangential and flow to along cyclone dryer (6) again after coming out from the pneumatic conveyer dryer top into cyclone dryer (6) bottom, draw by cyclone dryer (6) top afterwards, gas emptying after gas solid separation, product (9) sieves packing.The effect of swirling eddy has not only increased the solid material time of staying, and has strengthened gas-solid two-phase contact strength, heat transfer, mass transfer rate thereby be improved, but, also exist the following problem owing to adopt one air-flow:
1. because air-flow all passes through cyclone dryer (6), therefore, the reduction of speed section is conducted heat, mass transfer force is not high, certainly will need long drying time and bigger drier diameter, and the equipment needed thereby volume is big;
2. flow process is terminal separates because product (9) coexists with the weary gas one of emptying, and nonhygroscopic in order to guarantee naval stores, emptying gas must have lower humidity and higher temperature, therefore is unfavorable for saving energy and reduce the cost;
3. after the series connection of constant-speed section and reduction of speed section, drying process is longer, and the power consumption of blower fan is strengthened relatively.
The combined efficient power-saving rotary flow desiccator as shown in Figure 2, be to the improvement of MST cyclone drying device and perfect, its characteristics are: pneumatic conveyer dryer (4) is not simple serial or parallel connection with rotary flow desiccator (10), but a kind of combination, drying medium and material in pneumatic conveyer dryer (4) are and the stream contact, in rotary flow desiccator (10), be counter current contacting, the drying medium that leaves blower fan (1) is divided into two strands, behind gas heater (2), be further divided into two strands through one of gas heater (2), one sends into pneumatic conveyer dryer (4) bottom, another strand then mixes with that strand cold airflow that leaves blower fan (1), sends into the drier bottom along rotary flow desiccator (10) tangential direction then.Wet stock to be dried is sent into by pneumatic conveyer dryer (4) bottom, the back of coming out from pneumatic conveyer dryer (4) top is tangential and flow to into rotary flow desiccator (10) top along rotary flow desiccator (10), gas solid separation afterwards, upwards emptying behind cyclone separator (7) (8) of gas, material along helix move downward and with from bottom to top along the air-flow counter current contacting of spiral motion, product (9) is emitted from rotary flow desiccator (10) bottom.The combined efficient power-saving rotary flow desiccator, the performance that not only has cyclone drying, and solved the existing problem of MST cyclone drying device to a certain extent, but owing to be the gas-solid counter current contacting in the rotary flow desiccator, therefore operating gas velocity and material particular diameter distribute and all have been subjected to bigger restriction, operating gas velocity is too high, and the small particle diameter material will directly be taken out of from rotary flow desiccator (10) top; Operating gas velocity is too low, and the time of staying of material is just too short, and product quality is difficult to ensure; The major diameter particle time of staying is shorter, might be dry insufficient; The small diameter particles time of staying is longer, might be excessively dry, so operating flexibility is less relatively.
The objective of the invention is to design a kind of energy-saving combined high-elasticity cyclone drier, overcome the deficiency of prior art, by changing the gas-solid way of contact, increase equipment operating flexibility, by improving the eddy flow plate structure, further strengthening mass transfer between gas-solid, therefore, is to the further improvement of existing patented technology and perfect.
The energy-saving combined high-elasticity cyclone drier of the present invention's design comprises blower fan, gas heater, pneumatic conveyer dryer, rotary flow desiccator, one-level, secondary cyclone and star heater.Blower fan has two, and one is the pneumatic conveyer dryer blower fan, and this blower fan and gas heater link, and one is the rotary flow desiccator blower fan, and this blower fan and gas heater link.Be provided with cyclone separator between pneumatic conveyer dryer and the rotary flow desiccator.Star feeder is located between primary cyclone and the cyclone separator.
The height of used pneumatic conveyer dryer and diameter ratio are 15～30 among the present invention.The height of used rotary flow desiccator is 5～10 with the diameter ratio.
Major advantage of the present invention is: between pneumatic conveyer dryer (4) and the rotary flow desiccator (10) is a kind of organic combination, drying medium and material remain and flow contact, make and contain wet stock and at first contact with the higher drying medium of temperature, then contact with the lower drying medium of temperature again, increased the transmission motive force of two driers simultaneously, dry run is strengthened, and steam consumption reduces greatly; Dry run is divided into two sections, drying medium is divided into two stocks and does not enter two sections driers, shortened the drying medium stroke, the process resistance is less, and the blower fan power consumption is lower: drying medium is divided into two strands, and the drying medium that enters rotary flow desiccator (10) only accounts for 15～35% of total amount, therefore, rotary flow desiccator (10) diameter is less, and volume is less, and the equipment input is lower.Rotary flow desiccator (10) adopts gas-solid and flows the way of contact, and operating gas velocity raises, and residence time of material shortens, but the gas-solid full contact, dry tenacity increases: operating gas velocity reduces, and the gas-solid contact weakens, and dry tenacity reduces, but residence time of material increases; The major diameter particle time of staying is longer; The small diameter particles time of staying is shorter, therefore, operating gas velocity height no matter, how material particular diameter distributes, and all can obtain stable qualified products, and the equipment operating flexibility is bigger.
The present invention can be widely used in resin dryings such as MBS, PVC, ABS, also can be applicable to the drying of other heavy chemicals, medicine, dyestuff, biochemical product, food, because organically combination between two sections driers, this drying device drying efficiency is higher and energy consumption is lower, compares with the cyclone drying technology, and the equipment investment of dry workshop section can reduce 12%, steam consumption can reduce by 26%, power consumption can reduce by 17%, and simultaneously, operating flexibility is big.
Description of drawings:
Fig. 1 and Fig. 2 are the prior art structural representations.
Fig. 3 is the structural representation of the energy-saving combined high-elasticity cyclone drier that designs of the present invention.
As shown in Figure 3, the energy-saving combined high-elasticity cyclone drier of the present invention design comprises blower fan 11,12, gas heater 2,13 and 17, pneumatic conveyer dryer 4, rotary flow desiccator 10, one-level, secondary cyclone 7 and 8 and star heater 16.Blower fan 12 is that pneumatic conveyer dryer 4 is used blower fan, and this blower fan and gas heater 13 link, and blower fan 11 is that rotary flow desiccator 10 is used blower fan, and this blower fan and gas heater 17 link.Be provided with cyclone separator 14 between pneumatic conveyer dryer 4 and the rotary flow desiccator 10.Star feeder 16 is located between primary cyclone 7 and the cyclone separator 10.
The height of used pneumatic conveyer dryer 4 and diameter ratio are 15～30 among the present invention.The height of used rotary flow desiccator 10 is 5～10 with the diameter ratio.
The concrete structure and the embodiment of energy-saving combined high-elasticity cyclone drier of the present invention are as follows:
Contain wet stock feeder (3) and be positioned at pneumatic conveyer dryer (4) bottom, material flow through successively pneumatic conveyer dryer (4) and rotary flow desiccator (10), two strands of drying mediums enter drier from two drier bottoms respectively behind blower fan (11) (12) and gas heater (13) (17), going into implication speed is 10～25 meter per seconds, one air-flow that enters rotary flow desiccator (10) accounts for 15～35% of total drying medium, carry and enter cyclone separator (14) after material comes out from rotary flow desiccator (10) top and carry out gas solid separation, product (9) is emitted from cyclone separator (14) bottom, air-flow then enters pneumatic conveyer dryer (4) for 4～12 meters from distance pneumatic conveyer dryer (4) top, the drying of converging and continue to participate in material with another strand air-flow, combined gas streams is come out from pneumatic conveyer dryer (4), successively enter cyclone separator (7) and (8) afterwards and carry out gas solid separation, solid material is collected by cyclone separator (7) substantially, send into rotary flow desiccator (10) inlet by star feeder (16) then, air-flow is emptying then.Rotary flow desiccator (10), its Dual-Phrase Distribution of Gas olid inlet is rotary flow desiccator (10) tangential direction, and the bottom is provided with spiral deflector (15), and the hand of spiral is consistent with the import tangential direction, and in addition, inside is provided with the conical eddy flow plate (5) of multistage certain kinds.The drier design parameter is: the height of pneumatic conveyer dryer (4) and diameter ratio are 15～30; The height of rotary flow desiccator (10) and diameter ratio are 5～10.
Claims (3)
1, a kind of energy-saving combined high-elasticity cyclone drier, this device comprises blower fan, gas heater, pneumatic conveyer dryer, rotary flow desiccator, one-level, secondary cyclone, it is characterized in that also comprising the star heater, described blower fan has two, and one is the pneumatic conveyer dryer blower fan, and this blower fan and gas heater link, one is the rotary flow desiccator blower fan, this blower fan and gas heater link, and are provided with cyclone separator between described pneumatic conveyer dryer and the rotary flow desiccator, and described star feeder is located between primary cyclone and the cyclone separator.
2, drying device as claimed in claim 1 is characterized in that, the height of wherein said pneumatic conveyer dryer and diameter ratio are 15～30.
3, drying device as claimed in claim 1 is characterized in that, the height of wherein said rotary flow desiccator is 5～10 with the diameter ratio.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99119714 CN1100977C (en) | 1999-09-29 | 1999-09-29 | Energy-saving combined high-elasticity cyclone drier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99119714 CN1100977C (en) | 1999-09-29 | 1999-09-29 | Energy-saving combined high-elasticity cyclone drier |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1250869A true CN1250869A (en) | 2000-04-19 |
| CN1100977C CN1100977C (en) | 2003-02-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99119714 Expired - Fee Related CN1100977C (en) | 1999-09-29 | 1999-09-29 | Energy-saving combined high-elasticity cyclone drier |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100348937C (en) * | 2005-09-05 | 2007-11-14 | 吉化集团公司 | Method and apparatus for drying copolymer of methyl methacrylate-styrene-butadiene |
| CN101876502A (en) * | 2010-06-17 | 2010-11-03 | 黄山华兰科技有限公司 | Rubber drying equipment |
| CN102967136A (en) * | 2012-11-30 | 2013-03-13 | 湖北泰盛化工有限公司 | Method for recovering condensed fluid of glyphosate synthesis solution |
| CN107940900A (en) * | 2017-10-12 | 2018-04-20 | 浙江工业大学 | The multilevel drying method and drying device of a kind of potassium fluoride in high activity |
-
1999
- 1999-09-29 CN CN 99119714 patent/CN1100977C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100348937C (en) * | 2005-09-05 | 2007-11-14 | 吉化集团公司 | Method and apparatus for drying copolymer of methyl methacrylate-styrene-butadiene |
| CN101876502A (en) * | 2010-06-17 | 2010-11-03 | 黄山华兰科技有限公司 | Rubber drying equipment |
| CN102967136A (en) * | 2012-11-30 | 2013-03-13 | 湖北泰盛化工有限公司 | Method for recovering condensed fluid of glyphosate synthesis solution |
| CN107940900A (en) * | 2017-10-12 | 2018-04-20 | 浙江工业大学 | The multilevel drying method and drying device of a kind of potassium fluoride in high activity |
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| Publication number | Publication date |
|---|---|
| CN1100977C (en) | 2003-02-05 |
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