CN110274439B - Boiling bed dryer - Google Patents
Boiling bed dryer Download PDFInfo
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- CN110274439B CN110274439B CN201910553505.3A CN201910553505A CN110274439B CN 110274439 B CN110274439 B CN 110274439B CN 201910553505 A CN201910553505 A CN 201910553505A CN 110274439 B CN110274439 B CN 110274439B
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- inert gas
- dryer
- boiling bed
- absorption tower
- boiling
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/001—Drying-air generating units, e.g. movable, independent of drying enclosure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/001—Drying-air generating units, e.g. movable, independent of drying enclosure
- F26B21/002—Drying-air generating units, e.g. movable, independent of drying enclosure heating the drying air indirectly, i.e. using a heat exchanger
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/003—Supply-air or gas filters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/004—Nozzle assemblies; Air knives; Air distributors; Blow boxes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/02—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure
- F26B21/04—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure partly outside the drying enclosure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/001—Handling, e.g. loading or unloading arrangements
- F26B25/002—Handling, e.g. loading or unloading arrangements for bulk goods
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B3/00—Drying solid materials or objects by processes involving the application of heat
- F26B3/02—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air
- F26B3/06—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried
- F26B3/08—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried so as to loosen them, e.g. to form a fluidised bed
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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
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Abstract
The invention relates to a boiling bed dryer, which comprises a box body and a boiling bed board, wherein the boiling bed board can be arranged at the bottom end in the box body in a vibrating way, one side of the box body is provided with a dryer feed inlet, and the dryer feed inlet is connected with one end of the boiling bed board through a second inclined plate so that materials in a vacuum feeder can slide onto the boiling bed board along the surface of the second inclined plate; the boiling bed dryer is communicated with the cyclone separator through a feed back pipe, and the inclined feed back pipe is arranged in the feed back pipe, so that materials recovered by the cyclone separator can enter the box body through the feed back pipe, and meanwhile, ascending air flow in the box body can be prevented from flowing into the feed back pipe.
Description
Technical Field
The invention relates to the technical field of drying equipment, in particular to a fluidized bed dryer.
Background
In the industries of medicine, chemical industry, food processing and the like, the drying of powder or particles is an important link; in particular, in the industrial production of powders or granules with high moisture content, the following problems exist with the existing plants: (1) Powder or particles containing certain moisture are easy to agglomerate in the process of entering drying equipment, so that the particle size of the powder or particles exceeds the standard and are not easy to dry; (2) The gas used for drying cannot be recycled in the drying process, so that the material loss is serious, and the environment is not protected.
Disclosure of Invention
The invention aims to provide a boiling bed dryer.
The invention provides a closed-circuit vibration boiling dryer unit, which comprises: the vacuum feeding device comprises a vacuum feeding machine, a heating system, a boiling bed dryer, a cyclone separator, a condensing washing absorption tower and a drying air source, wherein a feeding hole of the feeding machine of the vacuum feeding machine is in sealing connection with a feeding hole of the dryer of the boiling bed dryer, the boiling bed dryer comprises a box body and a boiling bed plate, the boiling bed plate can be arranged at the bottom end in the box body in a vibrating manner, one side of the box body is provided with the feeding hole of the dryer, and the feeding hole of the dryer is connected with one end of the boiling bed plate through a second inclined plate so that materials in the vacuum feeding machine can slide onto the boiling bed plate along the surface of the second inclined plate; the drying air source is connected with the bottom end of the box body in a sealing way through a heating system and a pipeline, so that the material passing through the boiling bed board can be heated and dried after inert gas generated by the drying air source is heated; the fluidized bed dryer is connected with the cyclone separator in a sealing way through a pipeline, so that inert gas heated on the fluidized bed board can enter the cyclone separator, and a feed opening at the bottom end of the cyclone separator is connected with the box body in a sealing way through a feed back pipe, so that materials recovered by the cyclone separator can enter the box body; the cyclone separator is in sealing connection with the condensing washing absorption tower through a pipeline, a spray header is arranged in the condensing washing absorption tower, and a plurality of stages of baffles are arranged above the spray header in a staggered manner, so that gas led out of the cyclone separator enters the condensing washing absorption tower and is sprayed out of the spray header to cool, and the arrangement of the plurality of stages of baffles can enhance the conveying distance of the gas in the condensing washing absorption tower and increase the absorption effect; the top of the condensing, washing and absorbing tower is connected with the bottom end of the box body in a sealing way through a pipeline and a heating system, so that the gas in the condensing, washing and absorbing tower enters the ebullated bed dryer after being dehumidified and heated by the catcher, and the recycling of the gas is realized.
Further, vacuum material loading machine top-down includes cylindrical feeding section, toper section, cylindricality section, back taper section, cylindrical unloading section and ejection of compact section in proper order, the little end top of toper section with feeding section sealing connection to when making the material get into the toper section through the feeding section, the diameter of a cylinder enlarges and sets up, can avoid the material adhesion on the toper section inner wall.
Further, the discharge port of the feeding machine is arranged at the bottom end of the discharge section, a first inclined plate is arranged in the discharge section, the top end of the first inclined plate is arranged at the bottom end of the discharging section, and the bottom end of the first inclined plate is arranged on the discharge port of the feeding machine, so that materials in the vacuum feeding machine can slide down to the discharge port of the feeding machine along the surface of the first inclined plate, and the vertical discharge is avoided, so that the materials are accumulated and agglomerated; the inner wall of vacuum material loading machine, coating halar coating on the second inclined plate, the inclination of first inclined plate, second inclined plate is 45, and the first inclined plate of continuous setting, second inclined plate make the material in the vacuum material loading machine can the landing to boiling bed board on, have effectively reduced the whereabouts speed of material, avoid the material to lift up when arriving on the boiling bed board, cause the material loss.
Further, the heating system comprises a steam heat exchanger and an electric heater, and inert gas generated by the drying air source is preheated by the steam heat exchanger and heated by the electric heater in sequence to reach the temperature required by drying the materials.
Further, the feed back pipe includes vertical discharging pipe, slope material pipe, vertical inlet pipe, the one end and the vertical discharging pipe of slope material pipe communicate with each other, and the other end communicates with each other with vertical inlet pipe, and vertical inlet pipe and cyclone's feed opening communicate with each other during the assembly, and the slope material pipe passes the lateral wall setting of box, vertical discharging pipe is arranged in the box to make cyclone's material that retrieves can get into the box through the feed back pipe, can prevent simultaneously that the ascending air current in the box from channeling into the feed back pipe, influence normal unloading.
Further, the condensation washing absorption tower comprises a reducing tower body and a main tower body, the reducing tower body is arranged at the upper part of the main tower body, the diameter of the reducing tower body is larger than that of the main tower body, the shape of the disc-shaped catcher is matched with that of the reducing tower body, so that the annular wall of the catcher is in sealing fit with the inner wall of the reducing tower body when the catcher is arranged in the reducing tower body, the effective working area of the catcher can be increased, and gas can not pass through the edge of the catcher; meanwhile, the speed of the sprayed gas entering the catcher is reduced, which is beneficial to the sedimentation of liquid drops; the trap is internally provided with a macroporous sieve plate, a plurality of penetrating ventilation holes are formed in the macroporous sieve plate, the diameter of the bottom end of each ventilation hole is smaller than that of the top end of each ventilation hole, so that gas can be decelerated again when passing through the ventilation holes, and sedimentation of liquid drops is facilitated.
Further, the closed-circuit vibration boiling dryer unit also comprises a condensed solution mixer and a circulating pump, wherein the spray header is communicated with the condensed solution mixer through a pipeline, and the main tower body is communicated with the condensed solution mixer through a pipeline and the circulating pump, so that condensed solution generated by the condensed solution mixer can be recycled.
Further, an absorption tower air outlet is arranged above the catcher of the condensing washing absorption tower, and a water baffle device for dehumidification is arranged between the absorption tower air outlet and the heating system; the gas outlet of the absorption tower is communicated with the heating system through a pipeline and a water baffle device, so that the inert gas in the condensing, washing and absorption tower is dried again when circulated and then enters the heating system for heating.
And the closed-circuit vibration boiling drying unit further comprises a recovery storage tank, and the recovery storage tank is communicated with the circulating pump through a pipeline and a control valve, so that when the material dissolved in the condensing solution of the condensing washing absorption tower reaches a set concentration, the material is pumped into the recovery storage tank by the circulating pump for recycling.
The working method of the closed-circuit vibration boiling dryer unit comprises the following steps:
A. and starting a drying air source to provide inert gas for all equipment of the unit, and starting a heating system to enable the inert gas heated to the required temperature to enter the ebullated bed dryer.
B. And feeding the material to be dried into a vacuum feeding machine through a vacuum hopper, so that the material slides onto the boiling bed plate through the first inclined plate and the second inclined plate.
C. The inert gas heated by the steam heat exchanger is introduced into the front end of the boiling bed board, so that the material is preheated at the front end of the boiling bed board.
D. Starting a vibration motor to vibrate the boiling bed board, so that the materials on the boiling bed board are conveyed forwards in a boiling state; and introducing the inert gas heated by the steam heat exchanger and the electric heater to the lower part of the boiling bed plate, and heating and drying the material passing through the upper part of the boiling bed plate.
E. Discharging the dried material from a dryer discharge port of the ebullated bed dryer; the cyclone separator is started to enable inert gas mixed with a small amount of material particles to enter the cyclone separator, the cyclone separator is used for sorting, and most of material particles in the inert gas flow back into the box body of the ebullated bed dryer through a feed back pipe at the bottom end of the cyclone separator.
F. The inert gas mixed with a very small amount of material particles enters a condensation washing absorption tower from a cyclone separator, firstly, a condensation solution sprayed out from a spray header is cooled, and the material particles in the inert gas are dissolved to obtain a mixed solution, and the mixed solution enters a condensation solution mixer through a circulating pump for recycling; the cooled inert gas rises and is blocked by a multi-stage baffle to change the conveying direction, so that the conveying path of the inert gas in the condensing, washing and absorbing tower is prolonged; when the inert gas enters the variable diameter tower body at the top end of the condensing washing absorption tower, the mixed liquid in the inert gas is absorbed again by the large-hole sieve plate of the catcher, so that the moisture content of the inert gas when the inert gas leaves the condensing washing absorption tower is reduced.
G. The inert gas leaves the condensing washing absorption tower, dehumidifies by the water deflector and enters the heating system for circulation; and the mixed solution collected in the water baffle device flows back to the condensing, washing and absorbing tower.
H. When the material dissolved by the sprayed condensation solution in the condensation washing absorption tower reaches the set concentration, the condensation solution in the condensation washing absorption tower is pumped into a recovery storage tank by a circulating pump for recycling.
The invention has the technical effects that: (1) Compared with the prior art, the closed-circuit vibration boiling dryer unit has the advantages that the first inclined plate is arranged in the discharging section of the vacuum feeder, the second inclined plate is arranged in front of the boiling bed plate, so that materials can slide into the boiling bed plate through the two-stage inclined plates, the distribution is more uniform, meanwhile, the materials slide along the inclined plates, the vertical falling of the materials can be avoided, the falling speed of the materials is reduced, and meanwhile, the lifting of the materials when the materials reach the boiling bed plate is avoided; (2) The inclined material pipe in the material return pipe enables the materials recovered by the cyclone separator to enter the box body through the material return pipe, and meanwhile, ascending airflow in the box body can be prevented from flowing into the material return pipe; (3) The disc-shaped catcher is arranged in the diameter-variable tower body, a macroporous sieve plate is arranged in the catcher, and ventilation holes on the macroporous sieve plate are arranged in an inverted cone shape, so that the speed of gas is reduced for a plurality of times when the gas passes through the catcher, the sedimentation of liquid drops is facilitated, and the moisture content of the gas passing through the catcher is lower; (4) The combination of the condensing solution mixer, the spray header and the circulating pump ensures that the gas can be cooled and decontaminated when entering the condensing washing absorption tower, and the gas can be recycled after multi-stage filtration.
Drawings
The invention is described in further detail below with reference to the drawings of the specification:
FIG. 1 is a schematic diagram of the closed-circuit vibration boiling dryer unit of the present invention;
FIG. 2 is a schematic structural view of a vacuum feeder;
FIG. 3 is a schematic diagram of the structure of a ebullated bed dryer;
FIG. 4 is a schematic view of the structure of the feed back pipe;
FIG. 5 is a schematic view of the structure of a condensing scrubber absorber.
In the figure: the vacuum feeder 1, the feeder discharge port 10, the vacuum feeding hopper 11, the Roots blower 12, the first filter 13, the feeding section 14, the conical section 15, the cylindrical section 16, the inverted conical section 17, the discharging section 18, the first inclined plate 19, the ebullated bed dryer 2, the tank 20, the ebullated bed plate 21, the vibration motor 211, the first steam heat exchanger 22, the first fan 221, the first electric heater 222, the second steam heat exchanger 23, the second fan 231, the second electric heater 232, the return pipe 24, the vertical discharge pipe 241, the inclined pipe 242, the vertical feed pipe 243, the first elbow 244, the second elbow 245, the dryer feed port 25, the second inclined plate 251, the exhaust port 26, the dryer discharge port 27, the electrostatic grounding system 271, the cyclone 3, the third fan 31, the cyclone discharge valve 32, the condensing wash absorber 4, the recovery tank 41, the second filter 42, the condensing solution mixer 43, the shower head 44, the baffle 45, the variable diameter tower 46, the disc-shaped catcher, the circulation pump 48, the water deflector 49, the drying tower 5, the air-absorbing tower 52, the air supply system 52.
Detailed Description
Embodiment 1 as shown in fig. 1, the closed-circuit vibration boiling dryer unit of the embodiment comprises a vacuum feeder 1, a heating system, a boiling bed dryer 2, a cyclone separator 3, a condensation washing absorption tower 4 and a drying air source 5; as shown in fig. 2, the vacuum feeding machine 1 sequentially comprises a cylindrical feeding section 14, a conical section 15, a cylindrical section 16, an inverted conical section 17, a cylindrical discharging section 18 and a discharging section from top to bottom, wherein the feeding section 14 is connected with a vacuum feeding hopper 11 through a pipeline; the small end top of the conical section 15 is in sealing connection with the feeding section 14, so that when the material 6 enters the conical section 15 through the feeding section 14, the diameter of the cylinder is enlarged, and the material can be prevented from adhering to the inner wall of the conical section 15. The bottom of discharge section is arranged in to the material loading machine discharge gate 10, sets up first hang plate 19 in this discharge section, and the bottom of unloading section 18 is arranged in on the top of this first hang plate 19, and the bottom of first hang plate 19 is arranged in on the material loading machine discharge gate 10 to make the material 6 in the vacuum material loading machine 1 can follow the surface landing of first hang plate 19 to the material loading machine discharge gate 10.
As shown in fig. 3, the ebullated bed dryer 2 includes a box 20 and a ebullated bed board 21, the ebullated bed board 21 is driven by a vibration motor 211, the vibration motor 211 can use a motor with large amplitude and low vibration frequency, so that the ebullated bed board 21 can be arranged at the bottom end in the box 20 in a vibrating way, one side of the box 20 is provided with a dryer feed port 25, the opposite side of the box 20 is provided with a dryer discharge port 27, the feeder discharge port 10 of the vacuum feeder 1 is in sealing connection with the dryer feed port 25 of the ebullated bed dryer 2, the dryer feed port 25 is connected with one end of the ebullated bed board 21 through a second inclined plate 251, the opposite end of the ebullated bed board 21 is communicated with the dryer discharge port 27, the inner wall of the vacuum feeder 1 and the second inclined plate 251 are coated with a halar coating, the inclined angles of the first inclined plate 19 and the second inclined plate 251 are 45 °, and the continuously arranged first inclined plate 19 and the second inclined plate 251 enable materials in the vacuum feeder 1 to reach the ebullated bed board 21. An electrostatic grounding system 271 is arranged at the discharge port 27 of the dryer to ensure the safety of equipment.
The drying air source 5 is used for providing inert gas for the ebullated bed dryer 2, in order to ensure that the drying effect heating system is divided into two groups, the first group heating system comprises a first fan 221, a first steam heat exchanger 22 and a first electric heater 222, the second group heating system comprises a second fan 231, a second steam heat exchanger 23 and a second electric heater 232, the inert gas is led into the first steam heat exchanger 22 by the first fan 221 to be heated, then is led out in two ways and is respectively controlled by corresponding control valves, one way is directly led to the front end of the ebullated bed board 21, the material 6 entering the ebullated bed board 21 is preheated, and the other way enters the middle part of the ebullated bed board 21 after the first electric heater 222 is continuously heated; the second fan 231 introduces inert gas into the second steam heat exchanger 23 for heating, then enters the second electric heater 232 for continuous heating, is led out in two paths and is controlled by corresponding control valves respectively, one path of inert gas is led to the middle part of the boiling bed plate 21, and the other path of inert gas is led to the rear part of the boiling bed plate 21, so that materials on the boiling bed plate 21 are heated and dried, and the boiling bed plate 21 is heated in three stages.
The top end of the box body of the fluidized bed dryer 2 is provided with two exhaust ports 26, the two exhaust ports 26 are respectively arranged above the front part of the fluidized bed board 21 and above the rear part of the fluidized bed board 21, and the exhaust ports 26 are communicated with the cyclone separator 3 through pipelines distributed in an inverted Y shape so that inert gas which heats materials on the fluidized bed board 21 and is mixed with a small amount of material particles enters the cyclone separator 3.
The blanking mouth at the bottom end of the cyclone separator 3 is connected with the box body 20 in a sealing way through a feed back pipe 24, so that materials recovered by the cyclone separator 3 can enter the box body 20; as shown in fig. 4, the feed back pipe 24 includes a vertical discharge pipe 241, an inclined pipe 242, and a vertical feed pipe 243, one end of the inclined pipe 242 is communicated with the vertical discharge pipe 241 through a first elbow pipe 244, the other end is communicated with the vertical feed pipe 243 through a second elbow pipe 245, the vertical feed pipe 243 is communicated with a feed opening of the cyclone separator 3 during assembly, the inclined pipe 242 is disposed through a side wall of the box 20, and the vertical discharge pipe 241 is disposed in the box 20, so that materials recovered by the cyclone separator 3 can enter the box 20 through the feed back pipe 24, and meanwhile, upward air flow in the box 20 can be prevented from flowing into the feed back pipe 24, and normal feed is affected.
The cyclone separator 3 is in sealing connection with the condensing washing absorption tower 4 through a third fan 31, a pipeline and a control valve, as shown in fig. 5, the condensing washing absorption tower 4 comprises a reducing tower body 46 and a main tower body, a spray header 44 is arranged in the main tower body of the condensing washing absorption tower 4, the closed-circuit vibration boiling drying unit also comprises a condensing solution mixer 43 and a circulating pump 48, the spray header 44 is communicated with the condensing solution mixer 43 through the pipeline and the control valve, so that the gas led out of the cyclone separator 3 enters the condensing washing absorption tower 4 and is sprayed out of the solution by the spray header 44 for cooling, three-stage baffles 45 are arranged above the spray header 44 in a staggered manner, and the arrangement of the three-stage baffles 45 can enhance the conveying distance of the gas in the condensing washing absorption tower 4 and increase the absorption effect; the main tower body is communicated with the condensed solution mixer 43 through a pipeline, a circulating pump 48 and a control valve, so that condensed solution generated by the condensed solution mixer 43 can be recycled; a second filter 42 is provided between the circulation pump 48 and the condensed solution mixer 43 to filter the circulation solution. The closed-circuit vibration boiling dryer unit further comprises a recovery storage tank 41, wherein the recovery storage tank 41 is communicated with a circulating pump 48 and a second filter 42 through pipelines and control valves, so that when the material dissolved in the condensed solution of the condensing washing absorption tower 4 reaches a set concentration, the material is not recycled, and the condensed solution is pumped into the recovery storage tank 41 by the circulating pump 48 to be recycled.
The diameter-variable tower 46 is arranged at the upper part of the main tower body, the diameter of the diameter-variable tower 46 is larger than that of the main tower body, a disc-shaped catcher 47 is arranged above the three-stage baffle 45 and in the diameter-variable tower 46, the shape of the catcher 47 is matched with that of the diameter-variable tower 46, so that when the catcher 47 is arranged in the diameter-variable tower 46, the annular wall of the catcher 47 is in sealing fit with the inner wall of the diameter-variable tower 46, the effective working area of the catcher 47 can be increased, and gas can not pass through the edge of the catcher 47; meanwhile, the speed of the sprayed gas entering the catcher 47 is reduced, which is beneficial to the sedimentation of liquid drops; the trap 47 is internally provided with a macroporous sieve plate, a plurality of penetrating ventilation holes are arranged on the macroporous sieve plate, and the diameter of the bottom end of each ventilation hole is smaller than that of the top end of each ventilation hole, so that gas can be decelerated again when passing through the ventilation holes, and sedimentation of liquid drops is facilitated.
An absorption tower air outlet is arranged above a catcher 47 of the condensing washing absorption tower 4, the absorption tower air outlet is communicated with a heating system through a pipeline and a control valve, and a water baffle 49 for dehumidification is arranged between the absorption tower air outlet and the heating system; so that the inert gas in the condensing, washing and absorbing tower 4 is dried again and then enters a heating system to be heated for recycling.
Preferably, the vacuum feeder 1 is controlled by a Roots blower 12, and a first filter 13 is arranged between the vacuum feeder 1 and the Roots blower 12 to prevent materials from being discharged along with gas.
Preferably, a baffle plate is arranged in the box body 20 of the ebullated bed dryer 2 to control the height of the material on the ebullated bed plate 21.
Preferably, a discharge pipeline and a cyclone discharge valve 32 are arranged between the cyclone separator 3 and the condensation washing absorption tower 4, and when the condensation washing absorption tower 4 fails, the gas in the ebullated bed dryer 2 and the cyclone separator 3 can be discharged by the discharge pipeline.
Preferably, an absorption tower evacuation system 51 is further arranged between the gas outlet of the absorption tower and the heating system, and is used for evacuating the gas in the condensation washing absorption tower 4 when an emergency occurs.
Preferably, a gas supplementing pipeline and a gas supplementing valve 52 of the absorption tower are arranged between the gas outlet of the absorption tower and the heating system, and are used for supplementing gas into the condensation washing absorption tower 4 when an emergency situation occurs.
Preferably, a vacuum hopper 11, a vacuum feeding machine 1 and a fluidized bed dryer 2 which are in contact with materials in the closed-circuit vibration fluidized bed dryer unit are made of 316L stainless steel, and the rest equipment is made of 304 stainless steel; the first fan, the second fan and the third fan adopt explosion-proof fans.
Preferably, the drying air source is a nitrogen source, and nitrogen is used as a drying and heating inert gas, so that the cost is low.
Example 2
The working method of the closed-circuit vibration boiling dryer unit comprises the following steps:
A. the drying gas source 5 is activated to supply inert gas to the various devices of the unit and the heating system is activated so that inert gas heated to the desired temperature enters the ebullated bed dryer 2.
B. The material 6 to be dried is fed into the vacuum feeder 1 through the vacuum hopper 11, so that the material slides onto the boiling bed plate 21 through the first inclined plate 19 and the second inclined plate 251.
C. The inert gas heated by the steam heat exchanger is introduced into the front end of the boiling bed plate 21 so that the material is preheated at the front end of the boiling bed plate 21.
D. Starting a vibration motor 211 to vibrate the boiling bed plate 21, so that the material 6 on the boiling bed plate 21 is conveyed forwards in a boiling state; the inert gas heated by the steam heat exchanger and the electric heater is introduced below the boiling bed plate 21, and the material passing above the boiling bed plate is heated and dried.
E. The dried material 6 is discharged from a dryer discharge port 27 of the ebullated bed dryer 2; the cyclone separator 3 is started so that inert gas mixed with a small amount of material particles enters the cyclone separator 3, the material particles are separated by the cyclone separator 3, and most of the material particles in the inert gas flow back into the box body 20 of the ebullated bed dryer 2 through the feed back pipe 24 at the bottom end of the cyclone separator 3.
F. The inert gas mixed with a very small amount of material particles enters a condensation washing absorption tower 4 from a cyclone separator 3, firstly, a condensation solution sprayed out from a spray header 44 is cooled and the material particles in the inert gas are dissolved to obtain a mixed solution, and the mixed solution enters a condensation solution mixer 43 through a circulating pump 48 for recycling; the inert gas after temperature reduction rises and is blocked by a multi-stage baffle 45 to change the conveying direction, so that the conveying path of the inert gas in the condensing, washing and absorbing tower 4 is prolonged; when the inert gas enters the reducing tower body 46 at the top end of the condensation washing absorption tower 4, the mixed liquid in the inert gas is absorbed again by the large-hole sieve plate of the catcher 47, so that the moisture content of the inert gas when the inert gas leaves the condensation washing absorption tower 4 is reduced.
G. The inert gas leaves the condensing washing absorption tower 4, dehumidifies by the water baffle 49 and enters a heating system for circulation; the mixed solution collected in the water deflector 49 is refluxed to the condensation wash absorption tower 4.
H. When the material dissolved in the sprayed condensed solution in the condensed washing and absorbing tower 4 reaches the set concentration, the condensed solution in the condensed washing and absorbing tower 4 is pumped into the recovery storage tank 41 by the circulating pump 48 for recovery and utilization.
It is apparent that the above examples are merely illustrative of the present invention and are not limiting of the embodiments of the present invention. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. And obvious changes and modifications which come within the spirit of the invention are desired to be protected.
Claims (1)
1. The working method of the closed-circuit vibration boiling dryer unit is characterized in that the closed-circuit vibration boiling dryer unit comprises the following steps: the vacuum feeding device comprises a vacuum feeding machine, a heating system, a boiling bed dryer, a cyclone separator, a condensing washing absorption tower and a drying air source, wherein a feeding hole of the feeding machine of the vacuum feeding machine is in sealing connection with a feeding hole of the dryer of the boiling bed dryer, the boiling bed dryer comprises a box body and a boiling bed plate, the boiling bed plate can be arranged at the bottom end in the box body in a vibrating manner, one side of the box body is provided with the feeding hole of the dryer, and the feeding hole of the dryer is connected with one end of the boiling bed plate through a second inclined plate so that materials in the vacuum feeding machine can slide onto the boiling bed plate along the surface of the second inclined plate; the drying air source is connected with the bottom end of the box body in a sealing way through a heating system and a pipeline, so that the material passing through the boiling bed board can be heated and dried after inert gas generated by the drying air source is heated; the fluidized bed dryer is in sealing connection with the cyclone separator through a pipeline, and a feed opening at the bottom end of the cyclone separator is in sealing connection with the box body through a feed back pipe; the cyclone separator is in sealing connection with the condensing washing absorption tower through a pipeline, a spray header is arranged in the condensing washing absorption tower, and a multi-stage baffle is arranged above the spray header in a staggered manner; a catcher is arranged above the multi-stage baffle in the condensing, washing and absorbing tower, and the top of the condensing, washing and absorbing tower is connected with the bottom end of the box body in a sealing way through a pipeline and a heating system;
the vacuum feeding machine sequentially comprises a cylindrical feeding section, a conical section, a cylindrical section, an inverted conical section, a cylindrical discharging section and a discharging section from top to bottom, wherein the top end of the small end of the conical section is in sealing connection with the feeding section, so that the diameter of the cylinder is enlarged when materials enter the conical section through the feeding section;
the feeding machine discharge port is arranged at the bottom end of the discharge section, a first inclined plate is arranged in the discharge section, the top end of the first inclined plate is arranged at the bottom end of the discharge section, and the bottom end of the first inclined plate is arranged on the feeding machine discharge port, so that materials in the vacuum feeding machine can slide down to the feeding machine discharge port along the surface of the first inclined plate; the inner wall of the vacuum feeding machine and the second inclined plate are coated with a halar coating, and the inclination angles of the first inclined plate and the second inclined plate are 45 degrees;
the heating system comprises a steam heat exchanger and an electric heater, and inert gas generated by the drying air source is preheated by the steam heat exchanger and heated by the electric heater in sequence;
the feeding pipe comprises a vertical discharging pipe, an inclined material pipe and a vertical feeding pipe, one end of the inclined material pipe is communicated with the vertical discharging pipe, the other end of the inclined material pipe is communicated with the vertical feeding pipe, the vertical feeding pipe is communicated with a discharging opening of the cyclone separator during assembly, the inclined material pipe penetrates through the side wall of the box body, and the vertical discharging pipe is arranged in the box body;
the condensing washing absorption tower comprises a reducing tower body and a main tower body, wherein the reducing tower body is arranged at the upper part of the main tower body, the diameter of the reducing tower body is larger than that of the main tower body, and the shape of the disc-shaped catcher is matched with the reducing tower body so that the annular wall of the catcher is in sealing fit with the inner wall of the reducing tower body when the catcher is arranged in the reducing tower body; a macroporous sieve plate is arranged in the catcher, a plurality of penetrating ventilation holes are formed in the macroporous sieve plate, and the diameter of the bottom end of each ventilation hole is smaller than that of the top end of each ventilation hole;
the closed-circuit vibration boiling dryer unit also comprises: the spray header is communicated with the condensed solution mixer through a pipeline, and the main tower body is communicated with the condensed solution mixer through a pipeline and a circulating pump;
an absorption tower air outlet is arranged above a catcher of the condensing washing absorption tower, and a water baffle for dehumidification is arranged between the absorption tower air outlet and the heating system; the gas outlet of the absorption tower is communicated with the heating system through a pipeline and a water baffle;
the closed-circuit vibration boiling dryer unit also comprises a recovery storage tank which is communicated with the circulating pump through a pipeline and a control valve;
the working method comprises the following steps:
A. starting a drying air source to provide inert gas for all equipment of the unit, and starting a heating system to enable the inert gas heated to the required temperature to enter a boiling bed dryer;
B. feeding the material to be dried into a vacuum feeding machine through a vacuum hopper, so that the material slides onto a boiling bed plate through a first inclined plate and a second inclined plate;
C. introducing inert gas heated by a steam heat exchanger into the front end of the boiling bed plate, so that the material is preheated at the front end of the boiling bed plate;
D. starting a vibrating motor to vibrate the boiling bed board so that the material on the boiling bed board is conveyed forwards in a boiling state; introducing inert gas heated by a steam heat exchanger and an electric heater to the lower part of the boiling bed board, so that the material passing over the boiling bed board is heated and dried by the inert gas;
E. discharging the dried material from a discharge port of a dryer obtained by the ebullated bed dryer; starting the cyclone separator to enable inert gas mixed with a small amount of material particles to enter the cyclone separator, carrying out winnowing separation by the cyclone separator, and enabling most of the material particles in the inert gas to flow back into a box body of the ebullated bed dryer through a feed back pipe at the bottom end of the cyclone separator;
F. the inert gas mixed with a very small amount of material particles enters a condensation washing absorption tower from a cyclone separator, firstly, a condensation solution sprayed out from a spray header is cooled, and the material particles in the inert gas are dissolved to obtain a mixed solution, and the mixed solution enters a condensation solution mixer through a circulating pump for recycling; the cooled inert gas rises and is blocked by a multi-stage baffle to change the conveying direction, so that the conveying path of the inert gas in the condensing, washing and absorbing tower is prolonged; when inert gas enters the variable diameter tower body at the top end of the condensing washing absorption tower, the mixed liquid in the inert gas is absorbed again by the large-hole sieve plate of the catcher, so that the moisture content of the inert gas when the inert gas leaves the condensing washing absorption tower is reduced;
G. the inert gas leaves the condensing washing absorption tower, dehumidifies by the water deflector and enters the heating system for circulation; the mixed solution collected in the water baffle device flows back to the condensing, washing and absorbing tower;
H. when the material dissolved by the sprayed condensation solution in the condensation washing absorption tower reaches the set concentration, the condensation solution in the condensation washing absorption tower is pumped into a recovery storage tank by a circulating pump for recycling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910553505.3A CN110274439B (en) | 2017-08-17 | 2017-08-17 | Boiling bed dryer |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910553505.3A CN110274439B (en) | 2017-08-17 | 2017-08-17 | Boiling bed dryer |
| CN201710707984.0A CN107449223B (en) | 2017-08-17 | 2017-08-17 | The closed circuit vibration fluidized drying unit of one kind and its working method |
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| CN201710707984.0A Division CN107449223B (en) | 2017-08-17 | 2017-08-17 | The closed circuit vibration fluidized drying unit of one kind and its working method |
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| CN110274439A CN110274439A (en) | 2019-09-24 |
| CN110274439B true CN110274439B (en) | 2023-08-11 |
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| CN201910553505.3A Active CN110274439B (en) | 2017-08-17 | 2017-08-17 | Boiling bed dryer |
| CN201710707984.0A Active CN107449223B (en) | 2017-08-17 | 2017-08-17 | The closed circuit vibration fluidized drying unit of one kind and its working method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110274439B (en) * | 2017-08-17 | 2023-08-11 | 江苏宇通干燥工程有限公司 | Boiling bed dryer |
| CN108224998A (en) * | 2018-03-08 | 2018-06-29 | 江苏金陵干燥科技有限公司 | Graphene particles drier special |
| CN108654513B (en) * | 2018-06-13 | 2024-02-27 | 长沙鑫本药业有限公司 | Vibration type spray granulator |
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| EP0570218A1 (en) * | 1992-05-13 | 1993-11-18 | Matsui Manufacturing Co., Ltd. | Processes and apparatuses for granulating and drying particulate materials |
| CN101571341A (en) * | 2009-06-11 | 2009-11-04 | 陆文光 | Fluid-bed drying system |
| CN102626965A (en) * | 2012-04-23 | 2012-08-08 | 中国天辰工程有限公司 | ABS powder drying method |
| CN205897121U (en) * | 2016-07-08 | 2017-01-18 | 中节能科技投资有限公司 | Doliform festival segmentation circulating fluidized bed feed back pipe device |
| CN106524670A (en) * | 2017-01-11 | 2017-03-22 | 陆文光 | Vibration boiling dryer |
| CN107449223A (en) * | 2017-08-17 | 2017-12-08 | 陆文光 | A kind of closed circuit vibrations fluidized drying unit and its method of work |
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2017
- 2017-08-17 CN CN201910553505.3A patent/CN110274439B/en active Active
- 2017-08-17 CN CN201710707984.0A patent/CN107449223B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0570218A1 (en) * | 1992-05-13 | 1993-11-18 | Matsui Manufacturing Co., Ltd. | Processes and apparatuses for granulating and drying particulate materials |
| CN101571341A (en) * | 2009-06-11 | 2009-11-04 | 陆文光 | Fluid-bed drying system |
| CN102626965A (en) * | 2012-04-23 | 2012-08-08 | 中国天辰工程有限公司 | ABS powder drying method |
| CN205897121U (en) * | 2016-07-08 | 2017-01-18 | 中节能科技投资有限公司 | Doliform festival segmentation circulating fluidized bed feed back pipe device |
| CN106524670A (en) * | 2017-01-11 | 2017-03-22 | 陆文光 | Vibration boiling dryer |
| CN107449223A (en) * | 2017-08-17 | 2017-12-08 | 陆文光 | A kind of closed circuit vibrations fluidized drying unit and its method of work |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107449223A (en) | 2017-12-08 |
| CN110274439A (en) | 2019-09-24 |
| CN107449223B (en) | 2019-08-06 |
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Effective date of registration: 20230719 Address after: 213000 Shunnan Village, Zhenglu Town, Tianning District, Changzhou City, Jiangsu Province Applicant after: JIANGSU YUTONG DRYING EQUIPMENT CO.,LTD. Address before: 213000 Shunnan Village, Zhenglu Town, Tianning District, Changzhou City, Jiangsu Province Applicant before: Lu Wenguang |
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