CN101949635A - Closed cycle spray drying and solvent recovery system - Google Patents
Closed cycle spray drying and solvent recovery system Download PDFInfo
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- CN101949635A CN101949635A CN 201010291950 CN201010291950A CN101949635A CN 101949635 A CN101949635 A CN 101949635A CN 201010291950 CN201010291950 CN 201010291950 CN 201010291950 A CN201010291950 A CN 201010291950A CN 101949635 A CN101949635 A CN 101949635A
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Abstract
The invention relates to a closed cycle spray drying and solvent recovery system which comprises a feed pump, a spray drying tower, a cyclone dust collector, a bag type dust collector, a filter, an air blower, a condenser and a heater, wherein the lower part of the spray drying tower is provided with an air-blast sprayer, and a nitrogen supply pipe is connected with the feed inlet of the air-blast sprayer; the air outlet of the spray drying tower is connected with the air inlet of the cyclone dust collector through a 1st pipeline, the air outlet of the cyclone dust collector is connected with the air inlet of the bag type dust collector through a 2nd pipeline, the air outlet of the bag type dust collector is connected with the air inlet of the condenser through a 3rd pipeline, the filter and the air blower are serially connected to the 3rd pipeline, the air outlet of the condenser is connected with the air inlet of the spray drying tower through a 4th pipeline, and the heater is serially connected to the 4th pipeline. The system product has the advantages of high yield, guaranteed quality and good security, and is not only suitable for feed liquid with good flowability, but also suitable for feed liquid with high viscosity and poor flowability.
Description
Technical field
The present invention relates to closed cycle spray-drying and solvent recovery system.
Background technology
China Patent No. be 200520107528.5 utility model patent specification disclosed be a kind of closed circuit cycle centrifugal spray drier, comprise successively the gas heater, centrifugal spray drying tower and the cyclone separator that connect, between the air inlet of the air stream outlet of cyclone separator and gas heater, be orderly connected with airtight hydrofuge machine, spray column, condenser, gas-liquid separator, airtight air blast by pipeline; The air inlet of gas heater also links for pipe with the inert gas of outside.Drying medium is a nitrogen, nitrogen enters filter cleaning and heater heating after distributor enters drying tower through the driving of enclosed blower fan, material forms tiny droplet through the centrifugal atomizer atomizing, in drying tower, realize the caloic exchange with hot-air, be dried to powder product in a short period of time, product is collected by collector at the bottom of the tower continuously, and the fine grained product enters cyclone separator with induced draught system and finishes gas solid separation, hot and humid gas through the spray column dedusting after condenser enters the recirculation of enclosed blower fan.The centrifugal spray drying tower of above-mentioned closed cycle adopts the atomizing rotating disk, and the atomizing rotating disk is not suitable for the atomizing of the feed liquid of viscosity height, mobile difference, has limited the scope of application of this drying system to a great extent.In dry and solvent removal process, the leftover materials dust enters in the spray column with nitrogen, by the spray mode, last residue micro mist in the damp and hot nitrogen is reclaimed, owing to there is the material dust about 10% to enter in the spray column with drying medium, so the organic solvent that sprays can cause product waste and production cost to improve with the good material dust of drying is wetting again.There is potential safety hazard in a large amount of organic solvent of spray column internal memory simultaneously.
Summary of the invention
Be to propose high and safe and reliable closed cycle spray-drying and the solvent recovery system of a kind of finished product recovery rate in main purpose of the present invention, it not only is suitable for the feed liquid of good fluidity, but also being suitable for viscosity height, mobile poor feed liquid, further purpose of the present invention is that the quality of finished product is guaranteed.
For achieving the above object, the present invention takes following technical scheme.
This closed cycle spray-drying and solvent recovery system comprise feed pump, spray drying tower, deduster, filter, blower fan, condenser, heater, it is characterized in that: the body of the tower bottom of described spray drying tower is provided with the air-flowing type sprayer, feed pump is connected by the charging aperture of feeder sleeve with the air-flowing type sprayer, and a nitrogen is connected with the charging aperture of air-flowing type sprayer for pipe; Deduster comprises cyclone dust collectors and sack cleaner, the air outlet of described spray-drying tower bottom is connected with the air inlet of described cyclone dust collectors by No. 1 pipeline, the air outlet of cyclone dust collectors is connected with the air inlet of described sack cleaner by No. 2 pipelines, the air outlet of sack cleaner is connected with the air inlet of described condenser by No. 3 pipelines, described filter and blower fan are serially connected on above-mentioned No. 3 pipelines, the air outlet of condenser is connected with the air inlet at the body of the tower top of described spray drying tower by No. 4 pipelines, and described heater is serially connected on No. 4 pipelines.
Described air-flowing type sprayer has nozzle, nozzle has nozzle body, nozzle core and cap of spraying nozzle, the top of described nozzle body has the cavity of being made up of cylinder chamber and annular chamber, the position that annular chamber surrounds is provided with connecting hole, described nozzle core is made up of head and shank, the shank threads of nozzle core is connected in the connecting hole of nozzle body, the head of nozzle core is in the cylinder chamber of nozzle body, described cap of spraying nozzle is threaded in the outside, upper end of described nozzle body, has the gap between the end face of nozzle core and the top inner wall of cap of spraying nozzle, this gap is the premixer, the head outer surface of nozzle core is provided with the helical form airslide that connects annular chamber and premixer, the central authorities of nozzle core are provided with the material through hole, and nozzle body is provided with and the material through hole all-in-one-piece material through hole of nozzle core and the air-flow through hole that communicates with annular chamber.
On the described nozzle body and the below that the is in cap of spraying nozzle locking nut that has been threaded.
The body of the tower top of described spray drying tower is equipped with the venting of dust explosion film.
In the body of the tower of described spray drying tower and the air inlet below that is in spray drying tower body of the tower top is provided with 1 to 2 layer of air uniform plate.
The tank body of described sack cleaner is interior and be provided with nitrogen blowback jet pipe above filter bag, and nitrogen blowback jet pipe is connected for pipe with a nitrogen, and nitrogen is provided with magnetic valve for pipe.
The housing of described condenser is made up of preceding conical shell, rectangle shell and back conical shell, is respectively equipped with air inlet and air outlet on the forward and backward conical shell, and rectangle shell bottom is provided with condensate liquid and collects mouth; The left side of rectangle shell, respectively be provided with some vertical slot on the inwall of right side, wherein every groove of a side inwall by dividing plate be divided into independent of each other on, the lower part, be respectively that freezing liquid goes back to the chamber and freezing liquid enters the chamber, every groove of opposite side inwall is the freezing liquid adapter cavity, in rectangular case, pasting a left side, the right side inwall respectively is provided with tube sheet, each freezing liquid advances between chamber and the relative freezing liquid adapter cavity, each freezing liquid returns between chamber and the relative freezing liquid adapter cavity and is equipped with one group of condenser pipe that is connected between the two tube sheet corresponding apertures, and every condenser pipe group comprises the condenser pipe more than 8; The housing position that corresponding every freezing liquid enters the chamber is provided with feed tube, all feed tubes all are connected with the feed liquor house steward, the housing position that corresponding every freezing liquid goes back to the chamber is provided with liquid back pipe, and all liquid back pipes all are connected with time liquid house steward, and the feed liquor house steward all is connected with freezing unit with time liquid house steward.
In the described condenser, be provided with homogenating plate, be provided with the blinds liquid barrier at an end of air outlet at an end of air inlet.
Be tied with the heat radiation aluminium strip of tight contact on the condenser pipe of described condenser.
On No. 1 pipeline, be provided with the leaving air temp sensor, the relief valve and the exhaust-valve that on No. 4 pipelines, are provided with condensation temperature flowmeter sensor, pressure sensor, nitrogen replenishment valve, inflated with nitrogen valve, EAT sensor and connect by arm, in addition, respectively be provided with valve for pipe and No. 2 nitrogen on the pipe at No. 1 nitrogen.
The present invention has following good effect: 1, native system is save spray column, improved the security performance of system, by cyclone dust collectors and the rewinding of sack cleaner two-stage dust removal, product recovery rate height not only, owing to be two-stage dust removal, can prevent influences condensation effect because of dust is adsorbed in condenser surface.2, the air-flowing type sprayer of native system employing, not only the feed liquid of suitable good fluidity also is applicable to viscosity height, mobile poor feed liquid, has enlarged the scope of application of native system.The air-flowing type sprayer does not have mechanical transmission component, good airproof performance, cleaning to remove and install convenient and low price.The nozzle core interchangeable of the air-flowing type sprayer of native system, size by transposing nozzle core, the outlet of change nozzle core is adjusted the flow of material, by changing the angle that nozzle core comes adjustable screw shape airslide, radial shear power with strengthening flow, make the droplet of atomizing more even, solved not dry, the little droplet particle drying over-education phenomenon of big droplet particle of aerodynamic atomization device in the past, the quality of finished product is guaranteed.3, the sack cleaner of native system has nitrogen blowback jet pipe, and every certain hour, nitrogen blowback jet pipe is jetted once, and the material dust that is adsorbed on filter cloth bag outer wall is blown off in charging basket.In the past since the material dust of the absorption of filter bag outer wall strengthen gradually; the gas flow resistance strengthens gradually; the ventilation of system reduces gradually; directly influence the quality of finished product; and need shut down the cleaning of filter bag and to pull down filter bag and just can carry out; be provided with nitrogen blowback jet pipe, for the cleaning of filter bag is provided convenience.Because the material dust of the absorption of filter bag outer wall all the time seldom, the ventilation of system can not be affected, and the quality of finished product is guaranteed.4, the condenser that adopts of native system is provided with a plurality of freezing liquids and enters the chamber, the feed liquor house steward imports each freezing liquid to freezing liquid simultaneously and enters the chamber, freezing liquid can enter with freezing liquid to advance in the condenser pipe that the chamber is connected simultaneously, gas is in the condenser pipe flows outside, so native system is simple in structure and condensation effect is good, the phenomenon of having avoided the gaseous state organic solvent all not liquefy.Especially the condenser pipe outer wall closely contacts around the heat radiation aluminium strip and with condenser pipe, has improved and has got effect with fixed attention.5, the condenser air inlet is provided with homogenating plate, avoids gas in condenser skewness or short circuit phenomenon, and the exit is provided with liquid barrier, will tackle and flow into condenser bottom and collection with the organic solvent drop that gas is taken out of.6, native system is equipped with the venting of dust explosion film at the body of the tower top of spray drying tower, has strengthened the security performance of system.
Description of drawings
For the easier quilt of content of the present invention is clearly understood, according to specific embodiment also in conjunction with the accompanying drawings, the present invention is further detailed explanation below.
Fig. 1 is a configuration diagram of the present invention.
Fig. 2 is the configuration diagram of air-flowing type sprayer.
Fig. 3 is the configuration diagram of nozzle core.
Fig. 4 is the vertical view of Fig. 3.
Fig. 5 is the C-C cutaway view of Fig. 4.
Fig. 6 is the configuration diagram of sack cleaner.
Fig. 7 is the structure of condenser diagrammatic sketch.
Fig. 8 is the vertical view (broken section) of Fig. 7.
Fig. 9 is the G-G cutaway view of Fig. 8.
The specific embodiment
(Embodiment 1)
See Fig. 1, present embodiment comprises feed pump 1, spray drying tower 2, deduster, tertiary filter 5, enclosed blower fan 6, condenser 7, heater 10, and deduster comprises cyclone dust collectors 3 and sack cleaner 4.The body of the tower top of described spray drying tower 2 is provided with pneumatic hammer 2-1, the body of the tower bottom is provided with air-flowing type sprayer 18, feed pump 1 is connected with the charging aperture of air-flowing type sprayer 18 by feeder sleeve 12, and No. 1 nitrogen confession is managed 11 and is in charge of respectively by two and is connected with the charging aperture of air-flowing type sprayer 18 with pneumatic hammer 2-1.The air outlet of spray drying tower 2 bottoms is connected with the air inlet of described cyclone dust collectors 3 by No. 1 pipeline 13, the air outlet of cyclone dust collectors 3 is connected with the air inlet of described sack cleaner 4 by No. 2 pipelines 14, the air outlet of sack cleaner 4 is connected with the air inlet of described condenser 7 by No. 3 pipelines 15, described filter 5 and blower fan 6 are serially connected on above-mentioned No. 3 pipelines 15, the air outlet of condenser 7 is connected with the air inlet at the body of the tower top of described spray drying tower 2 by No. 4 pipelines 16, and described heater 10 is serially connected on No. 4 pipelines 16.The body of the tower top of described spray drying tower 2 is equipped with venting of dust explosion film 2-4.In the body of the tower of described the spray drying tower 2 and air inlet 2-3 below that is in spray drying tower body of the tower top is provided with 1～2 layer of air uniform plate 2-5, to prevent air turbulence.
See Fig. 1 to Fig. 5, described air-flowing type sprayer 18 has nozzle, nozzle has nozzle body 18-1, nozzle core 18-2 and cap of spraying nozzle 18-3, the top of nozzle body 18-1 has the cavity of being made up of cylinder chamber 18-b and annular chamber 18-c, the position that annular chamber 18-c surrounds is provided with connecting hole, described nozzle core 18-2 is made up of head 18-2-1 and shank 18-2-2, the shank 18-2-2 of nozzle core 18-2 is threaded in the connecting hole of nozzle body 18-1, and the head of nozzle core 18-2 is in the cylinder chamber 18-b of nozzle body 18-1, described cap of spraying nozzle 18-3 is threaded in the outside, upper end of described nozzle body 18-1, has the gap between the top inner wall of the end face of nozzle core 18-2 and cap of spraying nozzle 18-3, this gap is the 18-e of premixer, the head outer surface of nozzle core 18-2 is provided with the helical form airslide 18-c that connects annular chamber 18-b and the 18-e of premixer, the central authorities of nozzle core 18-2 are provided with material through hole 18-a, and nozzle body 18-1 is provided with and the material through hole 18-a all-in-one-piece material through hole 18-a of nozzle core 18-2 and the air-flow through hole 18-d that communicates with annular chamber 18-b.Nozzle body 18-1 goes up and the below that is in cap of spraying nozzle 18-3 has been threaded locking nut 18-4.Unclamp locking nut 18-4, adjust the size of the 18-e of premixer by swivel nozzle cap 18-3.
See Fig. 1 and Fig. 6, the tank body of described sack cleaner 4 is interior and be provided with nitrogen blowback jet pipe 4-3 above filter bag 4-2, and nitrogen blowback jet pipe 4-3 is provided with magnetic valve 4-4, and nitrogen blowback jet pipe 4-3 is connected for pipe 17 with No. 2 nitrogen.A discharging opening 4-1 is established in the bottom of sack cleaner, and valve and charging basket are housed.Can open once every 20 seconds by computer-controlled motor-driven valve, to the filter bag inwall once high speed stream of nitrogen gas of jetting, the material dust that is adsorbed on the cloth bag outer wall is blown off, and is collected by charging basket.
See Fig. 1, Fig. 7 to Fig. 9, the housing of described condenser 7 is made up of preceding conical shell, rectangle shell and back conical shell, be respectively equipped with air inlet 7-1 and air outlet 7-2 on the forward and backward conical shell, rectangle shell bottom is provided with condensate liquid and collects a mouthful 7-3, and condensate liquid is collected a mouthful 7-3 and is connected with condensate liquid storage tank 8.The left side of rectangle shell, respectively be provided with some vertical slot 7-4 on the inwall of right side, wherein every groove 7-4 of a side inwall by dividing plate 7-5 be divided into independent of each other on, the lower part, be respectively that freezing liquid returns chamber 7-4-2 and freezing liquid advances chamber 7-4-1, every groove 7-4 of opposite side inwall is freezing liquid adapter cavity 7-4-3, in rectangular case, pasting a left side, the right side inwall respectively is provided with tube sheet 7-6, each freezing liquid advances between chamber 7-4-1 and the relative freezing liquid adapter cavity 7-4-3, each freezing liquid returns between chamber 7-4-2 and the relative freezing liquid adapter cavity 7-4-3 and is equipped with one group of condenser pipe 7-9 that is connected between the two tube sheet 7-6 corresponding apertures, every condenser pipe group comprises the condenser pipe more than 8, is tied with the heat radiation aluminium strip 7-10 of tight contact on the condenser pipe 7-9 of described condenser 7.
The housing position that corresponding every freezing liquid advances chamber 7-4-1 is provided with feed tube 7-11, all feed tube 7-11 all are connected with feed liquor house steward 7-13, the housing position that corresponding every freezing liquid returns chamber 7-4-2 is provided with liquid back pipe 7-12, all liquid back pipe 7-12 all are connected with time liquid house steward 7-14, and feed liquor house steward 7-13 all is connected with freezing unit 9 with time liquid house steward 7-14.In the described condenser 7, be provided with homogenating plate 7-7, be provided with blinds liquid barrier 7-8 at an end of air outlet at the end of air inlet 7-1.
See Fig. 1, on No. 1 pipeline 13, be provided with leaving air temp sensor 20, the air bleeding valve 23 that on No. 4 pipelines 16, is provided with condensation temperature flowmeter sensor 21, oxygen analysis instrument 22, pressure sensor 24, relief valve 25, nitrogen replenishment valve 26, EAT sensor 27 and connects by arm, in addition, respectively be provided with valve for 11 and No. 2 nitrogen of pipe for managing on 17 at No. 1 nitrogen.
Material enters spray drying tower 2 by air-flowing type sprayer 18, dried material successively enters cyclone dust collectors 3 with the dry gas that contains solvent and sack cleaner 4 carries out gas solid separation, the finished product that two dedusters are collected is by the delivery outlet output of bottom separately, dry gas enters condenser 7 by filter 5 and blower fan 6 and reclaims condensate liquid, the condensate liquid that reclaims is collected by condensate liquid storage tank 8, carries back spray drying tower 2 again by 10 heating of dry gas heater via and the filtration of condenser output.
Claims (10)
1. closed cycle spray-drying and solvent recovery system, comprise feed pump (1), spray drying tower (2), deduster, filter (5), blower fan (6), condenser (7), heater (10), it is characterized in that: the body of the tower bottom of described spray drying tower (2) is provided with air-flowing type sprayer (18), feed pump (1) is connected with the charging aperture of air-flowing type sprayer (18) by feeder sleeve (12), and a nitrogen is connected with the charging aperture of air-flowing type sprayer (18) for pipe (11); Deduster comprises cyclone dust collectors (3) and sack cleaner (4), the air outlet of described spray drying tower (2) bottom is connected with the air inlet of described cyclone dust collectors (3) by No. 1 pipeline (13), the air outlet of cyclone dust collectors (3) is connected with the air inlet of described sack cleaner (4) by No. 2 pipelines (14), the air outlet of sack cleaner (4) is connected with the air inlet of described condenser (7) by No. 3 pipelines (15), described filter (5) and blower fan (6) are serially connected on above-mentioned No. 3 pipelines (15), the air outlet of condenser (7) is connected with the air inlet at the body of the tower top of described spray drying tower (2) by No. 4 pipelines (16), and described heater (10) is serially connected on No. 4 pipelines (16).
2. closed cycle spray-drying according to claim 1 and solvent recovery system, it is characterized in that: described air-flowing type sprayer (18) has nozzle, nozzle has nozzle body (18-1), nozzle core (18-2) and cap of spraying nozzle (18-3), the top of described nozzle body (18-1) has the cavity of being made up of cylinder chamber (18-b) and annular chamber (18-c), the position that annular chamber (18-c) surrounds is provided with connecting hole, described nozzle core (18-2) is made up of head (18-2-1) and shank (18-2-2), the shank (18-2-2) of nozzle core (18-2) is threaded in the connecting hole of nozzle body (18-1), the head of nozzle core (18-2) is in the cylinder chamber (18-b) of nozzle body (18-1), described cap of spraying nozzle (18-3) is threaded in the outside, upper end of described nozzle body (18-1), has the gap between the top inner wall of the end face of nozzle core (18-2) and cap of spraying nozzle (18-3), this gap is premixer (18-e), the head outer surface of nozzle core (18-2) is provided with the helical form airslide (18-c) that connects annular chamber (18-b) and premixer (18-e), the central authorities of nozzle core (18-2) are provided with material through hole (18-a), and nozzle body (18-1) is provided with and material through hole (18-a) the all-in-one-piece material through hole (18-a) of nozzle core (18-2) and the air-flow through hole (18-d) that communicates with annular chamber (18-b).
3. closed cycle spray-drying according to claim 2 and solvent recovery system is characterized in that: described nozzle body (18-1) is gone up and the below that is in cap of spraying nozzle (18-3) has been threaded locking nut (18-4).
4. closed cycle spray-drying according to claim 1 and solvent recovery system is characterized in that: the body of the tower top of described spray drying tower (2) is equipped with venting of dust explosion film (2-4).
5. closed cycle spray-drying according to claim 1 and solvent recovery system is characterized in that: in the body of the tower of described spray drying tower (2) and air inlet (2-3) below that is in spray drying tower body of the tower top is provided with 1 to 2 layer of air uniform plate (2-5).
6. closed cycle spray-drying according to claim 1 and solvent recovery system, it is characterized in that: be provided with nitrogen blowback jet pipe (4-3) in the tank body of described sack cleaner (4) and in the top of filter bag (4-2), nitrogen blowback jet pipe (4-3) is connected for pipe (17) with a nitrogen, and nitrogen is provided with magnetic valve (4-4) for pipe (17).
7. closed cycle spray-drying according to claim 1 and solvent recovery system, it is characterized in that: the housing of described condenser (7) is made up of preceding conical shell, rectangle shell and back conical shell, be respectively equipped with air inlet (7-1) and air outlet (7-2) on the forward and backward conical shell, rectangle shell bottom is provided with condensate liquid and collects mouthful (7-3); The left side of rectangle shell, respectively be provided with some vertical slot (7-4) on the inwall of right side, wherein every groove (7-4) of a side inwall by dividing plate (7-5) be divided into independent of each other on, the lower part, be respectively that freezing liquid goes back to chamber (7-4-2) and freezing liquid enters chamber (7-4-1), every groove (7-4) of opposite side inwall is freezing liquid adapter cavity (7-4-3), in rectangular case, pasting a left side, the right side inwall respectively is provided with tube sheet (7-6), each freezing liquid advances between chamber (7-4-1) and the relative freezing liquid adapter cavity (7-4-3), each freezing liquid returns between chamber (7-4-2) and the relative freezing liquid adapter cavity (7-4-3) and is equipped with one group of condenser pipe (7-9) that is connected between two tube sheets (7-6) corresponding aperture, and every condenser pipe group comprises the condenser pipe more than 8; The housing position that corresponding every freezing liquid enters chamber (7-4-1) is provided with feed tube (7-11), all feed tubes (7-11) all are connected with feed liquor house steward (7-13), the housing position that corresponding every freezing liquid goes back to chamber (7-4-2) is provided with liquid back pipe (7-12), all liquid back pipes (7-12) all are connected with time liquid house steward (7-14), and feed liquor house steward (7-13) all is connected with freezing unit (9) with time liquid house steward (7-14).
8. closed cycle spray-drying according to claim 7 and solvent recovery system is characterized in that: in the described condenser (7), be provided with homogenating plate (7-7) at an end of air inlet (7-1), be provided with blinds liquid barrier (7-8) at an end of air outlet.
9. closed cycle spray-drying according to claim 7 and solvent recovery system is characterized in that: the heat radiation aluminium strip (7-10) that is tied with tight contact on the condenser pipe (7-9) of described condenser (7).
10. closed cycle spray-drying according to claim 7 and solvent recovery system, it is characterized in that: on No. 1 pipeline (13), be provided with leaving air temp sensor (20), the relief valve (22) and the exhaust-valve (23) that on No. 4 pipelines (16), are provided with condensation temperature flowmeter sensor (21), pressure sensor (24), nitrogen replenishment valve (25), inflated with nitrogen valve (26), EAT sensor (27) and connect by arm, in addition, respectively be provided with valve for pipe (11) and No. 2 nitrogen for managing on (17) at No. 1 nitrogen.
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| CN2010102919506A CN101949635B (en) | 2010-09-26 | 2010-09-26 | Closed cycle spray drying and solvent recovery system |
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| CN2010102919506A CN101949635B (en) | 2010-09-26 | 2010-09-26 | Closed cycle spray drying and solvent recovery system |
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