CN211199076U - Device for continuously recovering furfuryl alcohol - Google Patents
Device for continuously recovering furfuryl alcohol Download PDFInfo
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- CN211199076U CN211199076U CN201922365616.XU CN201922365616U CN211199076U CN 211199076 U CN211199076 U CN 211199076U CN 201922365616 U CN201922365616 U CN 201922365616U CN 211199076 U CN211199076 U CN 211199076U
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- XPFVYQJUAUNWIW-UHFFFAOYSA-N furfuryl alcohol Chemical compound OCC1=CC=CO1 XPFVYQJUAUNWIW-UHFFFAOYSA-N 0.000 title claims abstract description 243
- 239000003054 catalyst Substances 0.000 claims abstract description 101
- 238000011084 recovery Methods 0.000 claims abstract description 93
- 239000007787 solid Substances 0.000 claims abstract description 61
- 239000012071 phase Substances 0.000 claims abstract description 25
- 239000007791 liquid phase Substances 0.000 claims abstract description 21
- 239000002910 solid waste Substances 0.000 claims abstract description 19
- 238000003756 stirring Methods 0.000 claims description 44
- 239000002184 metal Substances 0.000 claims description 37
- 230000002441 reversible effect Effects 0.000 claims description 28
- 239000007790 solid phase Substances 0.000 claims description 10
- 230000005540 biological transmission Effects 0.000 claims description 6
- 238000009776 industrial production Methods 0.000 abstract description 6
- 238000013461 design Methods 0.000 abstract description 4
- 239000002699 waste material Substances 0.000 description 35
- 239000007789 gas Substances 0.000 description 29
- 238000000926 separation method Methods 0.000 description 17
- 238000000034 method Methods 0.000 description 16
- 230000000052 comparative effect Effects 0.000 description 10
- 238000001914 filtration Methods 0.000 description 9
- 239000000463 material Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 230000009471 action Effects 0.000 description 5
- 238000001035 drying Methods 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 238000009833 condensation Methods 0.000 description 4
- 230000005494 condensation Effects 0.000 description 4
- 238000010924 continuous production Methods 0.000 description 4
- 238000007599 discharging Methods 0.000 description 4
- 238000002309 gasification Methods 0.000 description 4
- 238000005984 hydrogenation reaction Methods 0.000 description 4
- 238000003825 pressing Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- MKYBYDHXWVHEJW-UHFFFAOYSA-N N-[1-oxo-1-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propan-2-yl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(C(C)NC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 MKYBYDHXWVHEJW-UHFFFAOYSA-N 0.000 description 2
- 230000004075 alteration Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- HYBBIBNJHNGZAN-UHFFFAOYSA-N furfural Chemical compound O=CC1=CC=CO1 HYBBIBNJHNGZAN-UHFFFAOYSA-N 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 241000406668 Loxodonta cyclotis Species 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000012824 chemical production Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000011949 solid catalyst Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000001291 vacuum drying Methods 0.000 description 1
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- 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
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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- Processing Of Solid Wastes (AREA)
Abstract
The utility model belongs to a device for continuously recovering furfuryl alcohol; the device comprises a crusher for crushing the solid waste catalyst, wherein a discharge port of the crusher is connected with a feed port of a rotary dryer through an inclined hopper, the lower part of the discharge port of the rotary dryer is connected with a catalyst recovery tank, the upper part of the discharge port of the rotary dryer is connected with a gas-solid separator, a gas phase outlet of the gas-solid separator is connected with a condenser, a liquid phase outlet of the condenser is connected with a furfuryl alcohol recovery tank, and a gas phase outlet of the condenser is communicated with an external vacuum pump through a buffer tank; the device has the advantages of simple structure, reasonable flow design, high heat exchange efficiency, high recovery efficiency, stable operation, convenient operation and control, and continuous operation and industrial production.
Description
Technical Field
The utility model belongs to the technical field of furfuryl alcohol production, concretely relates to retrieve device of furfuryl alcohol in succession.
Background
The preparation method of furfuryl alcohol mainly comprises a gas phase hydrogenation method and a liquid phase hydrogenation method, and the liquid phase hydrogenation method adopted in the existing chemical production is common, namely under the conditions of high temperature and high pressure, furfural and excessive hydrogen are subjected to reduction hydrogenation under the action of a solid catalyst to react to generate crude furfuryl alcohol, the liquid-solid separation of the reacted crude furfuryl alcohol is realized in a centrifugal filtration or plate-and-frame filtration mode, the separated liquid is rectified to obtain a furfuryl alcohol finished product, and the solid waste catalyst in the reaction process is generally treated as waste solid; however, no matter centrifugal filtration or plate-and-frame filtration is adopted in sampling analysis, the solid waste catalyst still contains a large amount of liquid organic matters, the liquid organic matters account for 42-55 percent, and 90-95 percent of the liquid organic matters are furfuryl alcohol. If the residual organic matters are not recovered by the solid waste catalyst after the separation of the crude furfuryl alcohol, the consumption of finished products is high, but the yield is low, the economic loss is large, the treatment cost is increased, and the environmental pollution is serious.
Based on the defects, partial enterprises propose to recover the catalyst, the recovery process mainly adopts a drying and dehydrating mode in a vacuum box, the mode cannot be continuously operated, and the equipment has small limited treatment capacity, low recovery rate and long operation time, so that the method cannot be applied to industrial production; in order to realize the recovery of the catalyst and the crude furfuryl alcohol by using a dryer in the industrial production part of enterprises, the following defects exist in the process of recovering the solid waste catalyst by using a common dryer: 1. in the process of recovering the catalyst and the crude furfuryl alcohol in the dryer, the problem of incomplete recovery of the crude furfuryl alcohol is easily caused; 2. the catalyst in the dryer is easy to harden; 3. although continuous production can be realized, the amount of continuous production is small, and uneven heat exchange of materials is easily caused when the equivalent weight is too large, so that on one hand, the catalyst and the crude furfuryl alcohol cannot be completely separated, on the other hand, the catalyst is seriously hardened on the inner wall of the dryer, and the equipment cannot normally run when the catalyst is serious; 4. the recovery of the crude furfuryl alcohol needs to be carried out in a vacuum environment, and a crude furfuryl alcohol recovery device is easy to block, so that the crude furfuryl alcohol is retained in a drier, and the production cannot be smoothly carried out; 5. the recovered crude furfuryl alcohol contains impurities, so that the subsequent process of separating and extracting the refined furfuryl alcohol is more complicated, and the quality of the final refined furfuryl alcohol is easily influenced.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the defect among the prior art, and provide a simple structure, flow reasonable in design, heat exchange efficiency are high, recovery efficiency is high, the operation is stable, control the device of convenient, can realize continuous operation and industrial production's continuous recovery furfuryl alcohol.
The purpose of the utility model is realized like this: the device comprises a crusher for crushing solid waste catalyst, wherein a discharge port of the crusher is connected with a feed inlet of a rotary dryer through an inclined hopper, the lower part of the discharge port of the rotary dryer is connected with a catalyst recovery tank, the upper part of the discharge port of the rotary dryer is connected with a gas-solid separator, a gas phase outlet of the gas-solid separator is connected with a condenser, a liquid phase outlet of the condenser is connected with a furfuryl alcohol recovery tank, and a gas phase outlet of the condenser is communicated with an external vacuum pump through a buffer tank.
Preferably, the outer wall of the rotary dryer is provided with a heat exchange jacket, and the heat exchange jacket is provided with a first steam inlet and a first condensate outlet; a rotary dryer forward and reverse rotation motor is arranged on one side of a feed inlet of the rotary dryer, the rotary dryer forward and reverse rotation motor is connected with a driving hollow screw rotor through a transmission device on a main shaft, the interior of the driving hollow screw rotor is of a cavity structure, and a second steam inlet and a second condensate outlet are correspondingly arranged at the end parts of two ends of the driving hollow screw rotor; the first steam inlet and the second steam inlet are respectively connected with the steam pipe network, and the first condensate outlet and the second condensate outlet are respectively connected with the condensate recovery tank.
Preferably, the condensate recovery tank is connected with a condensate pipe network through a condensate booster pump and a preheating and crushing unit in the crusher; the preheating and crushing unit comprises a forward and reverse rotating motor arranged at the middle position of the top of the crusher, the forward and reverse rotating motor is connected with a hollow crushing stirring shaft through a main shaft, one side of the upper part of the hollow crushing stirring shaft is communicated with a condensate booster pump through a first metal hose, and the other side of the lower part of the hollow crushing stirring shaft is connected with a condensate pipe network through a second metal hose.
Preferably, the outer wall of the hollow crushing stirring shaft is provided with a plurality of metal coil pipes, and two ends of the plurality of metal coil pipes are respectively communicated with the middle cavity part of the hollow crushing stirring shaft.
Preferably, a filter screen is arranged between the upper part of the discharge port of the rotary dryer and the gas-solid separator, and a solid phase outlet of the gas-solid separator is connected with the catalyst recovery tank.
Preferably, the outer side of the driving hollow screw rotor is meshed with a plurality of driven hollow screw rotors, and the end parts of two ends of each driven hollow screw rotor are correspondingly provided with a third steam inlet and a third condensate outlet; the first steam inlet, the second steam inlet and the third steam inlet are respectively communicated with a steam pipe network through respective corresponding third metal hoses; the first condensate outlet, the second condensate outlet and the third condensate outlet are respectively communicated with the condensate recovery tank through the corresponding fourth metal hoses.
Preferably, the driving hollow screw rotor and the driven hollow screw rotor have the same internal structure in the rotary dryer, and the high radius of the external teeth of the hollow screw rotor is 0.8-1.5 times of the nominal diameter of the hollow screw rotor; the distance between the hollow screw rotor and the inner wall of the rotary dryer is 50-200 mm.
Preferably, the outer wall of the heat exchange jacket is uniformly provided with a plurality of hanging strips.
The utility model has the advantages of simple structure, flow reasonable in design, heat exchange efficiency are high, recovery efficiency is high, the operation is stable, control the convenience, can realize continuous operation and industrial production.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic view of the screw rotor structure of the present invention.
Detailed Description
In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described with reference to the accompanying drawings, in which like reference numerals refer to like parts in the drawings. For the sake of simplicity, only the parts related to the utility model are schematically shown in the drawings, and they do not represent the actual structure as a product.
As shown in fig. 1, 2, the utility model relates to a retrieve device of furfuryl alcohol in succession, including the breaker 1 that is used for broken solid waste catalyst, the discharge gate of breaker 1 links to each other through the feed inlet of oblique fill 2 with rotary dryer 3, rotary dryer 3's discharge gate lower part links to each other with catalyst recovery jar 4, rotary dryer 3's discharge gate upper portion links to each other with gas-solid separator 7, gas-phase outlet and the condenser 8 of gas-solid separator 7 link to each other, condenser 8's liquid phase export links to each other with furfuryl alcohol recovery jar 11, condenser 8's gas phase export is linked together through buffer tank 9 and outer vacuum pump 10 of arranging. The outer wall of the rotary dryer 3 is provided with a heat exchange jacket 12, and the heat exchange jacket 12 is provided with a first steam inlet 15 and a first condensate outlet 16; a rotary dryer forward and reverse rotation motor 13 is arranged on one side of a feed inlet of the rotary dryer 3, the rotary dryer forward and reverse rotation motor 13 is connected with a driving hollow screw rotor 14 through a transmission device on a main shaft, the interior of the driving hollow screw rotor 14 is of a cavity structure, and a second steam inlet 17 and a second condensate outlet 18 are correspondingly arranged at the end parts of two ends of the driving hollow screw rotor 14; the first steam inlet 15 and the second steam inlet 17 are respectively connected with a steam pipe network 19, and the first condensate outlet 16 and the second condensate outlet 18 are respectively connected with the condensate recovery tank 5. The condensate recovery tank 5 is connected with a condensate pipe network 20 through a condensate booster pump 6 and a preheating and crushing unit in the crusher 1; the preheating and crushing unit comprises a forward and reverse rotating motor 21 arranged in the middle position of the top of the crusher 1, the forward and reverse rotating motor 21 is connected with a hollow crushing stirring shaft 22 through a main shaft, one side of the upper part of the hollow crushing stirring shaft 22 is communicated with a condensate booster pump 6 through a first metal hose 23, and the other side of the lower part of the hollow crushing stirring shaft 22 is connected with a condensate pipe network 20 through a second metal hose 24. The outer wall of the hollow crushing stirring shaft 22 is provided with a plurality of metal coil pipes 25, and two ends of the plurality of metal coil pipes 25 are respectively communicated with the middle cavity part of the hollow crushing stirring shaft 22. A filter screen 26 is arranged between the upper part of the discharge hole of the rotary dryer 3 and the gas-solid separator 7, and the solid phase outlet of the gas-solid separator 7 is connected with the catalyst recovery tank 4. The outer side of the driving hollow screw rotor 14 is meshed with a plurality of driven hollow screw rotors 27, and the end parts of the two ends of each driven hollow screw rotor 27 are correspondingly provided with a third steam inlet 28 and a third condensate outlet 29; the first steam inlet 15, the second steam inlet 17 and the third steam inlet 28 are respectively communicated with the steam pipe network 19 through respective corresponding third metal hoses 30; the first condensate outlet 16, the second condensate outlet 18 and the third condensate outlet 29 are respectively communicated with the condensate recovery tank 5 through respective fourth metal hoses 31. The driving hollow screw rotor 14 and the driven hollow screw rotor 27 are consistent in internal structure of the rotary dryer 3, and the high radius of the external teeth of the hollow screw rotors is 0.8-1.5 times of the nominal diameter of the hollow screw rotors; the distance between the hollow screw rotor and the inner wall of the rotary dryer 3 is 50-200 mm. The outer wall of the heat exchange jacket 12 is uniformly provided with a plurality of hanging strips 32.
A recovery method of a device for continuously recovering furfuryl alcohol comprises the following steps:
step 1: before the crusher 1 feeds materials, steam is introduced into the heat exchange jacket 12, the driving hollow screw rotor 14 and the driven hollow screw rotor 27 through the steam pipe network 19 through the first steam inlet 15, the second steam inlet 17 and the third steam inlet 28, so that the rotary dryer 3 is preheated, and a condensate outlet pipeline is ensured to be smooth;
step 2: starting an external vacuum pump 10, and vacuumizing the condenser 8, the gas-solid separator 7, the rotary dryer 3 and the catalyst recovery tank 4 by the external vacuum pump 10 through a buffer tank 9 to establish a vacuum system;
and step 3: after the rotary dryer 3 is preheated and a vacuum system is established, the waste catalyst after centrifugal filtration or plate-and-frame filter pressing is added into the crusher 1, the forward and reverse rotating motor 21 and the condensate booster pump 6 are started, and the hollow crushing stirring shaft 22 rotates to preheat, stir and crush the waste catalyst; the preheated, stirred and crushed waste catalyst enters the rotary dryer 3 through the inclined hopper 2 and the feed inlet of the rotary dryer 3;
and 4, step 4: after the preheated, stirred and crushed waste catalyst in the step 3 enters the rotary dryer 3, the rotary dryer 3 rotates, meanwhile, the driving hollow screw rotors 14 drive the driven hollow screw rotors 27 to rotate so as to realize uniform heat exchange on the waste catalyst, and the temperature of the waste catalyst after heat exchange reaches the gasification temperature of furfuryl alcohol under an operation state, so that crude furfuryl alcohol attached to the waste catalyst is evaporated and gasified; the rotary dryer 3 has the same rotation rate as the active hollow screw rotor 14;
and 5: the catalyst after heat exchange moves to a discharge port of the rotary dryer 3 and enters a catalyst recovery tank 4 through a pipeline, and is recovered and repeatedly used as a crude furfuryl alcohol catalyst;
step 6: under the action of an external vacuum pump 10, the coarse furfuryl alcohol gas is communicated with a filter screen 26 and enters a gas-solid separator 7 for gas-solid separation, and the solid after the gas-solid separation enters a catalyst recovery tank 4 through a solid phase outlet of the solid separator 7;
and 7: and gas-solid separation gas phase enters a condenser 8 for condensation, condensed liquid phase enters a furfuryl alcohol recovery tank 11 for recovery through a liquid phase outlet of the condenser 8, and non-condensable gas after the condenser 8 is discharged through a gas phase outlet of the condenser 8, a buffer tank 9 and a discharge vacuum pump 10.
Preferably, the temperature of the waste catalyst after preheating, stirring and crushing in the step 3 is 40-60 ℃; in the step 4, the vacuum degree of the rotary dryer 3 is-60 KPa to-90 KPa, and the temperature in the rotary dryer 3 is as follows: 100-130 ℃; the material height of the catalyst recovery tank 4 in the step 5 is 300-500 mm; the liquid phase temperature passing through the condenser 8 in the step 7 is 35-50 ℃.
The utility model discloses in can realize solid waste catalyst's crushing and preheat through setting up breaker 1, the structure in above-mentioned crushing and the rotary drier 3 mutually supports can realize solid waste catalyst's even heating and prevent the characteristics that harden in the rotary drier 3 under the prerequisite that improves throughput, specific saying so, including many sets of heating tube ways and having adopted a plurality of hollow screw rotor in the rotary drier 3, above-mentioned structure can realize all-round heating and stirring to solid waste catalyst, this structure cooperation hanger 32 can realize that a small amount of dry catalyst that ties drops to rotary drier 3 outer wall's beat (rotary drier 3's running state is reciprocating rotation, hanger 32 beats under its running state according to the dead weight by oneself, need not manual control); in addition, the crusher 1 has a preheating function, which not only can effectively recycle the condensate, but also can save the steam consumption in the rotary dryer 3; the combination of the crusher 1 and the rotary dryer 3 of the utility model can realize the characteristics of improving the treatment capacity of the solid waste catalyst, saving the steam consumption, effectively and uniformly heating the solid waste catalyst and preventing the solid waste catalyst from hardening; in addition, the utility model discloses in still be equipped with filter screen 36 and gas-solid separator 7, filter the large granule dust and the impurity in the furfuryl alcohol gas phase through filter screen 36, retrieve the dust in the furfuryl alcohol gas phase through gas-solid separator 7 after filtering, it not only can make the catalyst obtain effectual recovery and can prevent that the dust from blockking up follow-up equipment, for the utility model discloses normal operating creates the condition; the utility model discloses in through setting up condenser 8, buffer tank 9, outer row vacuum pump 10 and furfuryl alcohol recovery tank 11, not only can make coarse furfuryl alcohol obtain effectual recovery, and establish the basis for creating vacuum environment, can also realize the initial gross separation to coarse furfuryl alcohol simultaneously (make noncondensable gas and coarse furfuryl alcohol separation in the organic matter). It should be noted that, in the present invention, the rotary dryer 3 and the active hollow screw rotor 14 are respectively provided with a power device, and the rotation between the two does not affect each other; the feed inlet of rotary dryer 3 and the discharge gate of rotary dryer 3 are rotary dryer feed arrangement and rotary dryer discharging device respectively, rotary dryer feed arrangement and rotary dryer discharging device link to each other with rotary dryer 3 activity respectively, at the rotatory in-process of rotary dryer 3, rotary dryer feed arrangement and rotary dryer discharging device irrotational, rotary dryer feed arrangement's bottom is equipped with and stretches into the slope unloading board of rotary dryer 3 inside and be used for supplying with solid waste catalyst to rotary dryer 3, rotary dryer 3 is equipped with and stretches into the slope unloading board of rotary dryer discharging device inside, the cross-section of the slope unloading board that links to each other with rotary dryer 3 is the ring form, and set up on the outer circumference of rotary dryer 3 export. To sum up, the utility model has the characteristics of reasonable in design, the nature controlled is strong, heat exchange efficiency is high, recovery efficiency is high, the operation is stable, can realize continuous operation and industrial production.
For a more detailed explanation of the present invention, the present invention will now be further explained with reference to the following examples. The specific embodiment is as follows:
example one
A device for continuously recovering furfuryl alcohol and a recovery method thereof comprise a crusher 1 for crushing solid waste catalyst, wherein a discharge port of the crusher 1 is connected with a feed port of a rotary dryer 3 through an inclined hopper 2, the lower part of the discharge port of the rotary dryer 3 is connected with a catalyst recovery tank 4, the upper part of the discharge port of the rotary dryer 3 is connected with a gas-solid separator 7, a gas phase outlet of the gas-solid separator 7 is connected with a condenser 8, a liquid phase outlet of the condenser 8 is connected with a furfuryl alcohol recovery tank 11, and a gas phase outlet of the condenser 8 is communicated with an external vacuum pump 10 through a buffer tank 9. The outer wall of the rotary dryer 3 is provided with a heat exchange jacket 12, and the heat exchange jacket 12 is provided with a first steam inlet 15 and a first condensate outlet 16; a rotary dryer forward and reverse rotation motor 13 is arranged on one side of a feed inlet of the rotary dryer 3, the rotary dryer forward and reverse rotation motor 13 is connected with a driving hollow screw rotor 14 through a transmission device on a main shaft, the interior of the driving hollow screw rotor 14 is of a cavity structure, and a second steam inlet 17 and a second condensate outlet 18 are correspondingly arranged at the end parts of two ends of the driving hollow screw rotor 14; the first steam inlet 15 and the second steam inlet 17 are respectively connected with a steam pipe network 19, and the first condensate outlet 16 and the second condensate outlet 18 are respectively connected with the condensate recovery tank 5. The condensate recovery tank 5 is connected with a condensate pipe network 20 through a condensate booster pump 6 and a preheating and crushing unit in the crusher 1; the preheating and crushing unit comprises a forward and reverse rotating motor 21 arranged in the middle position of the top of the crusher 1, the forward and reverse rotating motor 21 is connected with a hollow crushing stirring shaft 22 through a main shaft, one side of the upper part of the hollow crushing stirring shaft 22 is communicated with a condensate booster pump 6 through a first metal hose 23, and the other side of the lower part of the hollow crushing stirring shaft 22 is connected with a condensate pipe network 20 through a second metal hose 24. The outer wall of the hollow crushing stirring shaft 22 is provided with a plurality of metal coil pipes 25, and two ends of the plurality of metal coil pipes 25 are respectively communicated with the middle cavity part of the hollow crushing stirring shaft 22. A filter screen 26 is arranged between the upper part of the discharge hole of the rotary dryer 3 and the gas-solid separator 7, and the solid phase outlet of the gas-solid separator 7 is connected with the catalyst recovery tank 4. The outer side of the driving hollow screw rotor 14 is meshed with a plurality of driven hollow screw rotors 27, and the end parts of the two ends of each driven hollow screw rotor 27 are correspondingly provided with a third steam inlet 28 and a third condensate outlet 29; the first steam inlet 15, the second steam inlet 17 and the third steam inlet 28 are respectively communicated with the steam pipe network 19 through respective corresponding third metal hoses 30; the first condensate outlet 16, the second condensate outlet 18 and the third condensate outlet 29 are respectively communicated with the condensate recovery tank 5 through respective fourth metal hoses 31. The driving hollow screw rotor 14 and the driven hollow screw rotor 27 have the same internal structure in the rotary dryer 3, and the high radius of the external teeth of the hollow screw rotors is 0.8 times of the nominal diameter of the hollow screw rotors; the distance between the hollow screw rotor and the inner wall of the rotary dryer 3 was 50 mm. The outer wall of the heat exchange jacket 12 is uniformly provided with a plurality of hanging strips 32.
A recovery method of a device for continuously recovering furfuryl alcohol comprises the following steps:
step 1: before the crusher 1 feeds materials, steam is introduced into the heat exchange jacket 12, the driving hollow screw rotor 14 and the driven hollow screw rotor 27 through the steam pipe network 19 through the first steam inlet 15, the second steam inlet 17 and the third steam inlet 28, so that the rotary dryer 3 is preheated, and a condensate outlet pipeline is ensured to be smooth;
step 2: starting an external vacuum pump 10, and vacuumizing the condenser 8, the gas-solid separator 7, the rotary dryer 3 and the catalyst recovery tank 4 by the external vacuum pump 10 through a buffer tank 9 to establish a vacuum system;
and step 3: after the rotary dryer 3 is preheated and a vacuum system is established, the waste catalyst after centrifugal filtration or plate-and-frame filter pressing is added into the crusher 1, the forward and reverse rotating motor 21 and the condensate booster pump 6 are started, and the hollow crushing stirring shaft 22 rotates to preheat, stir and crush the waste catalyst; the preheated, stirred and crushed waste catalyst enters the rotary dryer 3 through the inclined hopper 2 and the feed inlet of the rotary dryer 3;
and 4, step 4: after the preheated, stirred and crushed waste catalyst in the step 3 enters the rotary dryer 3, the rotary dryer 3 rotates, meanwhile, the driving hollow screw rotors 14 drive the driven hollow screw rotors 27 to rotate so as to realize uniform heat exchange on the waste catalyst, and the temperature of the waste catalyst after heat exchange reaches the gasification temperature of furfuryl alcohol under an operation state, so that crude furfuryl alcohol attached to the waste catalyst is evaporated and gasified; the rotary dryer 3 has the same rotation rate as the active hollow screw rotor 14;
and 5: the catalyst after heat exchange moves to a discharge port of the rotary dryer 3 and enters a catalyst recovery tank 4 through a pipeline, and is recovered and repeatedly used as a crude furfuryl alcohol catalyst;
step 6: under the action of an external vacuum pump 10, the coarse furfuryl alcohol gas is communicated with a filter screen 26 and enters a gas-solid separator 7 for gas-solid separation, and the solid after the gas-solid separation enters a catalyst recovery tank 4 through a solid phase outlet of the solid separator 7;
and 7: and gas-solid separation gas phase enters a condenser 8 for condensation, condensed liquid phase enters a furfuryl alcohol recovery tank 11 for recovery through a liquid phase outlet of the condenser 8, and non-condensable gas after the condenser 8 is discharged through a gas phase outlet of the condenser 8, a buffer tank 9 and a discharge vacuum pump 10.
Preferably, the temperature of the waste catalyst after preheating, stirring and crushing in the step 3 is 40 ℃; in the step 4, the vacuum degree of the rotary dryer 3 is-60 KPa, and the temperature in the rotary dryer 3 is as follows: 100 ℃; the material height of the catalyst recovery tank 4 in the step 5 is 300 mm; the temperature of the liquid phase passing through the condenser 8 in said step 7 is 35 ℃.
Example two
A device for continuously recovering furfuryl alcohol and a recovery method thereof comprise a crusher 1 for crushing solid waste catalyst, wherein a discharge port of the crusher 1 is connected with a feed port of a rotary dryer 3 through an inclined hopper 2, the lower part of the discharge port of the rotary dryer 3 is connected with a catalyst recovery tank 4, the upper part of the discharge port of the rotary dryer 3 is connected with a gas-solid separator 7, a gas phase outlet of the gas-solid separator 7 is connected with a condenser 8, a liquid phase outlet of the condenser 8 is connected with a furfuryl alcohol recovery tank 11, and a gas phase outlet of the condenser 8 is communicated with an external vacuum pump 10 through a buffer tank 9. The outer wall of the rotary dryer 3 is provided with a heat exchange jacket 12, and the heat exchange jacket 12 is provided with a first steam inlet 15 and a first condensate outlet 16; a rotary dryer forward and reverse rotation motor 13 is arranged on one side of a feed inlet of the rotary dryer 3, the rotary dryer forward and reverse rotation motor 13 is connected with a driving hollow screw rotor 14 through a transmission device on a main shaft, the interior of the driving hollow screw rotor 14 is of a cavity structure, and a second steam inlet 17 and a second condensate outlet 18 are correspondingly arranged at the end parts of two ends of the driving hollow screw rotor 14; the first steam inlet 15 and the second steam inlet 17 are respectively connected with a steam pipe network 19, and the first condensate outlet 16 and the second condensate outlet 18 are respectively connected with the condensate recovery tank 5. The condensate recovery tank 5 is connected with a condensate pipe network 20 through a condensate booster pump 6 and a preheating and crushing unit in the crusher 1; the preheating and crushing unit comprises a forward and reverse rotating motor 21 arranged in the middle position of the top of the crusher 1, the forward and reverse rotating motor 21 is connected with a hollow crushing stirring shaft 22 through a main shaft, one side of the upper part of the hollow crushing stirring shaft 22 is communicated with a condensate booster pump 6 through a first metal hose 23, and the other side of the lower part of the hollow crushing stirring shaft 22 is connected with a condensate pipe network 20 through a second metal hose 24. The outer wall of the hollow crushing stirring shaft 22 is provided with a plurality of metal coil pipes 25, and two ends of the plurality of metal coil pipes 25 are respectively communicated with the middle cavity part of the hollow crushing stirring shaft 22. A filter screen 26 is arranged between the upper part of the discharge hole of the rotary dryer 3 and the gas-solid separator 7, and the solid phase outlet of the gas-solid separator 7 is connected with the catalyst recovery tank 4. The outer side of the driving hollow screw rotor 14 is meshed with a plurality of driven hollow screw rotors 27, and the end parts of the two ends of each driven hollow screw rotor 27 are correspondingly provided with a third steam inlet 28 and a third condensate outlet 29; the first steam inlet 15, the second steam inlet 17 and the third steam inlet 28 are respectively communicated with the steam pipe network 19 through respective corresponding third metal hoses 30; the first condensate outlet 16, the second condensate outlet 18 and the third condensate outlet 29 are respectively communicated with the condensate recovery tank 5 through respective fourth metal hoses 31. The driving hollow screw rotor 14 and the driven hollow screw rotor 27 have the same internal structure in the rotary dryer 3, and the high radius of the external teeth of the hollow screw rotors is 1.5 times of the nominal diameter of the hollow screw rotors; the distance between the hollow screw rotor and the inner wall of the rotary dryer 3 was 200 mm. The outer wall of the heat exchange jacket 12 is uniformly provided with a plurality of hanging strips 32.
A recovery method of a device for continuously recovering furfuryl alcohol comprises the following steps:
step 1: before the crusher 1 feeds materials, steam is introduced into the heat exchange jacket 12, the driving hollow screw rotor 14 and the driven hollow screw rotor 27 through the steam pipe network 19 through the first steam inlet 15, the second steam inlet 17 and the third steam inlet 28, so that the rotary dryer 3 is preheated, and a condensate outlet pipeline is ensured to be smooth;
step 2: starting an external vacuum pump 10, and vacuumizing the condenser 8, the gas-solid separator 7, the rotary dryer 3 and the catalyst recovery tank 4 by the external vacuum pump 10 through a buffer tank 9 to establish a vacuum system;
and step 3: after the rotary dryer 3 is preheated and a vacuum system is established, the waste catalyst after centrifugal filtration or plate-and-frame filter pressing is added into the crusher 1, the forward and reverse rotating motor 21 and the condensate booster pump 6 are started, and the hollow crushing stirring shaft 22 rotates to preheat, stir and crush the waste catalyst; the preheated, stirred and crushed waste catalyst enters the rotary dryer 3 through the inclined hopper 2 and the feed inlet of the rotary dryer 3;
and 4, step 4: after the preheated, stirred and crushed waste catalyst in the step 3 enters the rotary dryer 3, the rotary dryer 3 rotates, meanwhile, the driving hollow screw rotors 14 drive the driven hollow screw rotors 27 to rotate so as to realize uniform heat exchange on the waste catalyst, and the temperature of the waste catalyst after heat exchange reaches the gasification temperature of furfuryl alcohol under an operation state, so that crude furfuryl alcohol attached to the waste catalyst is evaporated and gasified; the rotary dryer 3 has the same rotation rate as the active hollow screw rotor 14;
and 5: the catalyst after heat exchange moves to a discharge port of the rotary dryer 3 and enters a catalyst recovery tank 4 through a pipeline, and is recovered and repeatedly used as a crude furfuryl alcohol catalyst;
step 6: under the action of an external vacuum pump 10, the coarse furfuryl alcohol gas is communicated with a filter screen 26 and enters a gas-solid separator 7 for gas-solid separation, and the solid after the gas-solid separation enters a catalyst recovery tank 4 through a solid phase outlet of the solid separator 7;
and 7: and gas-solid separation gas phase enters a condenser 8 for condensation, condensed liquid phase enters a furfuryl alcohol recovery tank 11 for recovery through a liquid phase outlet of the condenser 8, and non-condensable gas after the condenser 8 is discharged through a gas phase outlet of the condenser 8, a buffer tank 9 and a discharge vacuum pump 10.
Preferably, the temperature of the waste catalyst after preheating, stirring and crushing in the step 3 is 60 ℃; in the step 4, the vacuum degree of the rotary dryer 3 is-90 KPa, and the temperature in the rotary dryer 3 is as follows: 130 ℃; the material height of the catalyst recovery tank 4 in the step 5 is 500 mm; the temperature of the liquid phase passing through the condenser 8 in said step 7 is 50 ℃.
EXAMPLE III
A device for continuously recovering furfuryl alcohol and a recovery method thereof comprise a crusher 1 for crushing solid waste catalyst, wherein a discharge port of the crusher 1 is connected with a feed port of a rotary dryer 3 through an inclined hopper 2, the lower part of the discharge port of the rotary dryer 3 is connected with a catalyst recovery tank 4, the upper part of the discharge port of the rotary dryer 3 is connected with a gas-solid separator 7, a gas phase outlet of the gas-solid separator 7 is connected with a condenser 8, a liquid phase outlet of the condenser 8 is connected with a furfuryl alcohol recovery tank 11, and a gas phase outlet of the condenser 8 is communicated with an external vacuum pump 10 through a buffer tank 9. The outer wall of the rotary dryer 3 is provided with a heat exchange jacket 12, and the heat exchange jacket 12 is provided with a first steam inlet 15 and a first condensate outlet 16; a rotary dryer forward and reverse rotation motor 13 is arranged on one side of a feed inlet of the rotary dryer 3, the rotary dryer forward and reverse rotation motor 13 is connected with a driving hollow screw rotor 14 through a transmission device on a main shaft, the interior of the driving hollow screw rotor 14 is of a cavity structure, and a second steam inlet 17 and a second condensate outlet 18 are correspondingly arranged at the end parts of two ends of the driving hollow screw rotor 14; the first steam inlet 15 and the second steam inlet 17 are respectively connected with a steam pipe network 19, and the first condensate outlet 16 and the second condensate outlet 18 are respectively connected with the condensate recovery tank 5. The condensate recovery tank 5 is connected with a condensate pipe network 20 through a condensate booster pump 6 and a preheating and crushing unit in the crusher 1; the preheating and crushing unit comprises a forward and reverse rotating motor 21 arranged in the middle position of the top of the crusher 1, the forward and reverse rotating motor 21 is connected with a hollow crushing stirring shaft 22 through a main shaft, one side of the upper part of the hollow crushing stirring shaft 22 is communicated with a condensate booster pump 6 through a first metal hose 23, and the other side of the lower part of the hollow crushing stirring shaft 22 is connected with a condensate pipe network 20 through a second metal hose 24. The outer wall of the hollow crushing stirring shaft 22 is provided with a plurality of metal coil pipes 25, and two ends of the plurality of metal coil pipes 25 are respectively communicated with the middle cavity part of the hollow crushing stirring shaft 22. A filter screen 26 is arranged between the upper part of the discharge hole of the rotary dryer 3 and the gas-solid separator 7, and the solid phase outlet of the gas-solid separator 7 is connected with the catalyst recovery tank 4. The outer side of the driving hollow screw rotor 14 is meshed with a plurality of driven hollow screw rotors 27, and the end parts of the two ends of each driven hollow screw rotor 27 are correspondingly provided with a third steam inlet 28 and a third condensate outlet 29; the first steam inlet 15, the second steam inlet 17 and the third steam inlet 28 are respectively communicated with the steam pipe network 19 through respective corresponding third metal hoses 30; the first condensate outlet 16, the second condensate outlet 18 and the third condensate outlet 29 are respectively communicated with the condensate recovery tank 5 through respective fourth metal hoses 31. The driving hollow screw rotor 14 and the driven hollow screw rotor 27 have the same internal structure in the rotary dryer 3, and the high radius of the external teeth of the hollow screw rotors is 1.15 times of the nominal diameter of the hollow screw rotors; the distance between the hollow screw rotor and the inner wall of the rotary dryer 3 was 125 mm. The outer wall of the heat exchange jacket 12 is uniformly provided with a plurality of hanging strips 32.
A recovery method of a device for continuously recovering furfuryl alcohol comprises the following steps:
step 1: before the crusher 1 feeds materials, steam is introduced into the heat exchange jacket 12, the driving hollow screw rotor 14 and the driven hollow screw rotor 27 through the steam pipe network 19 through the first steam inlet 15, the second steam inlet 17 and the third steam inlet 28, so that the rotary dryer 3 is preheated, and a condensate outlet pipeline is ensured to be smooth;
step 2: starting an external vacuum pump 10, and vacuumizing the condenser 8, the gas-solid separator 7, the rotary dryer 3 and the catalyst recovery tank 4 by the external vacuum pump 10 through a buffer tank 9 to establish a vacuum system;
and step 3: after the rotary dryer 3 is preheated and a vacuum system is established, the waste catalyst after centrifugal filtration or plate-and-frame filter pressing is added into the crusher 1, the forward and reverse rotating motor 21 and the condensate booster pump 6 are started, and the hollow crushing stirring shaft 22 rotates to preheat, stir and crush the waste catalyst; the preheated, stirred and crushed waste catalyst enters the rotary dryer 3 through the inclined hopper 2 and the feed inlet of the rotary dryer 3;
and 4, step 4: after the preheated, stirred and crushed waste catalyst in the step 3 enters the rotary dryer 3, the rotary dryer 3 rotates, meanwhile, the driving hollow screw rotors 14 drive the driven hollow screw rotors 27 to rotate so as to realize uniform heat exchange on the waste catalyst, and the temperature of the waste catalyst after heat exchange reaches the gasification temperature of furfuryl alcohol under an operation state, so that crude furfuryl alcohol attached to the waste catalyst is evaporated and gasified; the rotary dryer 3 has the same rotation rate as the active hollow screw rotor 14;
and 5: the catalyst after heat exchange moves to a discharge port of the rotary dryer 3 and enters a catalyst recovery tank 4 through a pipeline, and is recovered and repeatedly used as a crude furfuryl alcohol catalyst;
step 6: under the action of an external vacuum pump 10, the coarse furfuryl alcohol gas is communicated with a filter screen 26 and enters a gas-solid separator 7 for gas-solid separation, and the solid after the gas-solid separation enters a catalyst recovery tank 4 through a solid phase outlet of the solid separator 7;
and 7: and gas-solid separation gas phase enters a condenser 8 for condensation, condensed liquid phase enters a furfuryl alcohol recovery tank 11 for recovery through a liquid phase outlet of the condenser 8, and non-condensable gas after the condenser 8 is discharged through a gas phase outlet of the condenser 8, a buffer tank 9 and a discharge vacuum pump 10.
Preferably, the temperature of the waste catalyst after preheating, stirring and crushing in the step 3 is 50 ℃; in the step 4, the vacuum degree of the rotary dryer 3 is-75 KPa, and the temperature in the rotary dryer 3 is as follows: 115 ℃ is carried out; the material height of the catalyst recovery tank 4 in the step 5 is 400 mm; the temperature of the liquid phase passing through the condenser 8 in said step 7 was 32.5 ℃.
The above detailed description is only specific to the feasible embodiments of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent embodiments, modifications and alterations without departing from the spirit of the present invention should be included in the scope of the present invention.
Examples of the experiments
The utility model discloses a group, random selection the device of the second embodiment of the utility model and recovery method are the utility model group.
Comparative example one: will the utility model discloses rotary dryer 3 replacement in the embodiment two is ordinary vacuum drying oven, other settings with the utility model discloses unanimous.
Comparative example two: will the utility model discloses rotary dryer 3 among the second embodiment is replaced by ordinary drying device, and steam only gets into ordinary drying device's the cover that presss from both sides in, other settings with the utility model discloses unanimous.
Comparative example three: the lime set does not enter the hollow crushing stirring shaft 22 and the metal coil pipe 25 in the crusher 1, and other settings are consistent with the utility model.
Comparative example four: the gas-solid separator 7 is not arranged, the furfuryl alcohol steam is directly discharged to the outside and enters the condenser 8, and other settings are consistent with the utility model.
Through the first utility model group and comparative example 1-4 go on contrasting to know, the utility model discloses the effect of group is obviously superior to comparative example 1-4, specifically see the following table:
| comparison of phenomena | Analysis of causes | |
| The utility model Model group | Continuous production is realized, the production capacity of a single set of device is 15-20 t/h, and the time is shortened The quality content of the collected furfuryl alcohol is 82-87%, and the recovery rate is 90-95% | The heat exchange structure of the dryer adopts a mutually meshed screw rotor form, is uniformly heated and can prevent Caking and high drying efficiency |
| Comparative example 1 | Intermittent production, wherein the single set of one-time treatment capacity is 20-100 kg, and the time is consumed 16h, the quality content of the recovered furfuryl alcohol is 50-56%, and the recovery rate is 30 ～35% | The feeding and receiving modes of the vacuum drier are manual, the treatment capacity is limited, and the vacuum degree is influenced Limit, and thus affect the recovery quality |
| Comparative example No. two | Intermittent production, maximum daily treatment capacity of 15t, quality content of recovered furfuryl alcohol 73-78%, and the recovery rate is 75-80%; | the heat exchange effect is limited by the structure, the heating is not uniform enough, and the hardening and the thickness are easy to appear in the drier The recovery rate of furfuryl alcohol is low, and the recovered waste catalyst is blockedThe problem of the outlet is that the outlet is, influencing the normal operation of the equipment |
| Comparative example No. three | The continuous production capacity is reduced to 10-15 t/h, and the temperature of steam condensed liquid is higher High, need to add a condenser for treatment | No preheating in the crusher results in prolonged heating time in the drying apparatus and steam The condensate is not reused, and a large amount of heat is wasted |
| Comparative example No. four | The condenser has poor heat exchange effect and the phenomenon of blocking a heat exchange pipeline occurs Elephant, regularly washed every 2 months | Without a gas-solid separation device, the solid waste catalyst deposits and scales in the heat exchange tube |
To sum up, adopt the utility model and relevant recovery technology not only can realize the continuous operation of recovery technology, and the screw rotor structure of desicator has improved the heat transfer effect, has realized thermal high-efficient utilization. According to the utility model provides a recovery effect handles 1t solid spent catalyst, wherein can produce crude furfuryl alcohol 522.5kg, turns into refined furfuryl alcohol 512kg, and the price of furfuryl alcohol is about 9000 yuan/ton at present, then per ton spent catalyst can increase 4608 yuan. According to the annual production capacity of furfuryl alcohol of a certain company, the recovery of furfuryl alcohol in the waste catalyst can increase by 106.2 ten thousand yuan only every year.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected," "connecting," and the like are to be construed broadly, and may be, for example, fixedly connected, integrally connected, or detachably connected; or communication between the interior of the two elements; they may be directly connected or indirectly connected through an intermediate, and those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific situation. The above examples are only specific illustrations of feasible embodiments of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent embodiments, modifications and alterations without departing from the technical spirit of the present invention are intended to be included in the scope of the present invention.
Claims (8)
1. An apparatus for continuously recovering furfuryl alcohol, characterized in that: the device comprises a crusher (1) for crushing solid waste catalyst, wherein a discharge port of the crusher (1) is connected with a feed inlet of a rotary dryer (3) through an inclined hopper (2), the lower part of the discharge port of the rotary dryer (3) is connected with a catalyst recovery tank (4), the upper part of the discharge port of the rotary dryer (3) is connected with a gas-solid separator (7), a gas phase outlet of the gas-solid separator (7) is connected with a condenser (8), a liquid phase outlet of the condenser (8) is connected with a furfuryl alcohol recovery tank (11), and a gas phase outlet of the condenser (8) is communicated with an external vacuum pump (10) through a buffer tank (9).
2. An apparatus for continuously recovering furfuryl alcohol according to claim 1, wherein: the outer wall of the rotary dryer (3) is provided with a heat exchange jacket (12), and the heat exchange jacket (12) is provided with a first steam inlet (15) and a first condensate outlet (16);
a rotary dryer forward and reverse rotation motor (13) is arranged on one side of a feed inlet of the rotary dryer (3), the rotary dryer forward and reverse rotation motor (13) is connected with a driving hollow screw rotor (14) through a transmission device on a main shaft, the interior of the driving hollow screw rotor (14) is of a cavity structure, and a second steam inlet (17) and a second condensate outlet (18) are correspondingly arranged at the end parts of the two ends of the driving hollow screw rotor (14);
the first steam inlet (15) and the second steam inlet (17) are respectively connected with a steam pipe network (19), and the first condensate outlet (16) and the second condensate outlet (18) are respectively connected with the condensate recovery tank (5).
3. An apparatus for continuously recovering furfuryl alcohol according to claim 2, wherein: the condensate recovery tank (5) is connected with a condensate pipe network (20) through a condensate booster pump (6) and a preheating and crushing unit in the crusher (1);
the preheating and smashing unit comprises a forward and reverse rotating motor (21) arranged in the middle of the top of the crusher (1), the forward and reverse rotating motor (21) is connected with a hollow crushing stirring shaft (22) through a main shaft, one side of the upper portion of the hollow crushing stirring shaft (22) is communicated with a condensate booster pump (6) through a first metal hose (23), and the other side of the lower portion of the hollow crushing stirring shaft (22) is connected with a condensate pipe network (20) through a second metal hose (24).
4. An apparatus for continuously recovering furfuryl alcohol according to claim 3, wherein: the outer wall of the hollow crushing stirring shaft (22) is provided with a plurality of metal coil pipes (25), and two ends of the plurality of metal coil pipes (25) are respectively communicated with the middle cavity part of the hollow crushing stirring shaft (22).
5. An apparatus for continuously recovering furfuryl alcohol according to claim 1, wherein: a filter screen (26) is arranged between the upper part of the discharge hole of the rotary dryer (3) and the gas-solid separator (7), and the solid phase outlet of the gas-solid separator (7) is connected with the catalyst recovery tank (4).
6. An apparatus for continuously recovering furfuryl alcohol according to claim 2, wherein: the outer side of the driving hollow screw rotor (14) is meshed with a plurality of driven hollow screw rotors (27), and the end parts of the two ends of each driven hollow screw rotor (27) are correspondingly provided with a third steam inlet (28) and a third condensate outlet (29);
the first steam inlet (15), the second steam inlet (17) and the third steam inlet (28) are respectively communicated with the steam pipe network (19) through respective corresponding third metal hoses (30);
the first condensate outlet (16), the second condensate outlet (18) and the third condensate outlet (29) are respectively communicated with the condensate recovery tank (5) through corresponding fourth metal hoses (31).
7. An apparatus for continuously recovering furfuryl alcohol according to claim 6, wherein: the driving hollow screw rotor (14) and the driven hollow screw rotor (27) are consistent in internal structure of the rotary dryer (3), and the high radius of the external teeth of the hollow screw rotors is 0.8-1.5 times of the nominal diameter of the hollow screw rotors; the distance between the hollow screw rotor and the inner wall of the rotary dryer (3) is 50-200 mm.
8. An apparatus for continuously recovering furfuryl alcohol according to claim 2, wherein: the outer wall of the heat exchange jacket (12) is uniformly provided with a plurality of hanging strips (32).
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110938049A (en) * | 2019-12-25 | 2020-03-31 | 河南心连心化学工业集团股份有限公司 | Device and method for continuously recovering furfuryl alcohol |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110938049A (en) * | 2019-12-25 | 2020-03-31 | 河南心连心化学工业集团股份有限公司 | Device and method for continuously recovering furfuryl alcohol |
| CN110938049B (en) * | 2019-12-25 | 2023-07-04 | 河南心连心化学工业集团股份有限公司 | Device and method for continuously recycling furfuryl alcohol |
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