CN102836672B - Horizontal boiling bed of spray granulation fluidized drying system - Google Patents

Horizontal boiling bed of spray granulation fluidized drying system Download PDF

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Publication number
CN102836672B
CN102836672B CN201210114069.8A CN201210114069A CN102836672B CN 102836672 B CN102836672 B CN 102836672B CN 201210114069 A CN201210114069 A CN 201210114069A CN 102836672 B CN102836672 B CN 102836672B
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tower
wind
dividing plate
boiling bed
hot blast
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CN102836672A (en
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张红娟
张小琴
陆文光
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CHANGZHOU YUTONG DRYING EQUIPMENT Co Ltd
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CHANGZHOU YUTONG DRYING EQUIPMENT Co Ltd
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Abstract

The invention relates to a horizontal boiling bed of a spray granulation fluidized drying system. The horizontal boiling bed comprises: a shell, a boiling bed plate arranged in the shell, an air distribution device used for providing hot air from the bottom of the boiling bed plate, and an air outlet arranged at one end of the shell top. An electric stirring device and multiple dedusting cloth bags are disposed over the boiling bed plate in order. A stirring device is disposed in the horizontal boiling bed, thus being suitable for improving the drying efficiency.

Description

The horizontal boiling bed of spraying granulation fluidized drying system
Technical field
The present invention relates to the technical field of drying equipment, specifically a kind of horizontal boiling bed of spraying granulation fluidized drying system.
Background technology
Existing Spray Grain-make Drier is widely used in the industries such as chemical industry, medicine, food, for the preparation of tablet, electuary, capsule, instant food, beverage particles, slow-releasing granules, chemical granule etc.
The technological process of existing Spray Grain-make Drier is generally: the heating of air heater via is laggard enters fluid bed bottom, through distribution grid, contacts with material, makes material be fluidization.The good binding agent of mother liquor is delivered to respectively atomizer by compression pump, coats fluidized particles surface so that particle bonds mutually after atomization, and through fluidisation constantly, coating, dry, particle is grown up gradually, discharges after reaching desired granularity from discharging port of fluidized bed.
The dry technological process of another kind of spraying granulation is: droplet and hot-air are worked in the mode of mixed flow, hot-air is to enter in tower by the hot-air distributor on top cover, hot-air distributor produces one downward streamline air draught, and droplet sprays into thermal air current from bottom to top.Droplet is spherical because surface tension effects forms, and simultaneously because droplet has very large surface area, wherein the rapid evaporation drying of moisture, forms dry spheric granules powder and finally shrink.
Above-mentioned the deficiencies in the prior art part is: in the dry droplet of spraying granulation, must contain binding agent, otherwise cannot granulate.And use binding agent makes production cost higher on the one hand, binding agent tends to affect product quality on the other hand.
How by a kind of be suitable for efficient granulate dry, without the spraying granulation drying system that uses binding agent, be the technical barrier of this area.
In addition, the drying efficiency of existing horizontal boiling bed is lower, dust granules spill-out is larger, how to address this problem, and is also the technical barrier of this area.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of simple in structure, horizontal boiling bed of being suitable for highly effective drying and the higher spraying granulation fluidized drying system of the fine grained material rate of recovery.
For solving the problems of the technologies described above, the horizontal boiling bed 7 of spraying granulation fluidized drying system provided by the invention, it comprises: housing, be located at boiling bed board 7.5 in this housing, for the bottom from described boiling bed board 7.5, provide the air-distribution device 7.1 of hot blast and the exhaust outlet of being located at case top, in housing, above this boiling bed board, be provided with successively electric mixing device 7.4 and a plurality of dust-removal cloth-bag 7.2.
The middle and upper part of interior, contiguous this housing of described housing is provided with central dividing plate, and the top margin of this central dividing plate is connected with the inner wall sealing of described housing with dual-side, described dust-removal cloth-bag 7.2 comprises a plurality of cloth bags that are distributed in these central dividing plate both sides, bottom opening in each cloth bag of described central dividing plate homonymy is fixed on a base fabric, on this base fabric, be distributed with the through hole being connected with the bottom opening of described cloth bag respectively, each base fabric is separately fixed on the support ring of the dividing plate both sides that mediate, the surrounding of each support ring is fixed with pressure bladder, each pressure bladder after inflation is suitable for making between each support ring and central dividing plate, and be sealed and matched between each support ring and the inwall of described housing, so that the ascending air in upper shell is only discharged by each cloth bag.Top in each cloth bag of described central dividing plate homonymy is connected with the piston rod of a shake cylinder, for controlling the alternately shake of cloth bag of described central dividing plate both sides; Described exhaust outlet comprises and is distributed in a pair of of described central dividing plate both sides, and each exhaust outlet is provided with butterfly valve, the shake cylinder alternation of described central dividing plate both sides, and when a shake cylinder starts to move, the described butterfly valve of homonymy is closed; Simultaneously, open with the butterfly valve of another shake cylinder homonymy, to realize the continuity of the bag-type dust operation of horizontal boiling bed, make the cloth bag that is distributed in described central dividing plate both sides alternately shake, the particle adsorbing on cloth bag is shaken off to bed board, realize the recycling of fines, after horizontal boiling bed is shut down, shake again simultaneously; The action of shake cylinder is controlled by PLC.
The spraying granulation fluidized drying system of applying described horizontal boiling bed comprises Centrafugal spray drying tower 1, and it comprises: at the bottom of upper-lower seal connects successively tower top 1.1, tower body 1.2 and taper tower 1.3; It is characterized in that: tower top 1.1 bottom center are provided with atomizer 1.4, in this spray drying tower 1 and under described atomizer 1.4, be provided with the pressure nozzle 1.5 for the spray powder that makes progress, this pressure nozzle 1.5 is connected with dry powder powder feed system.
Described tower top 1.1 is provided with minute vane 1.6 being connected with hot-air system, and on tower top 1.1 bottom surfaces, annular is evenly distributed with a plurality of hot blast shower nozzles 1.7 that are connected with minute vane 1.6, and each hot blast shower nozzle 1.7 is suitable for the output hot blast tangent with the inwall of barrel-type tower body 1.2.During work, the multiply hot blast of each hot blast shower nozzle 1.7 outputs is downward along the spiral inner wall of tower body 1.2, it is descending and contact, be bonded to plastochondria with dry powder particle that multiply whirlwind carries droplet, make plastochondria described in multiply whirlwind there is longer dry trip simultaneously, guaranteed the drying effect to described plastochondria.
Described hot blast shower nozzle 1.7 comprises: the conical shell that top is connected with described minute vane 1.6, on the bottom nozzle 1.7.0 of this conical shell, be evenly distributed with a plurality of parallel wind direction blade 1.7.1, the two ends central authorities of each wind direction blade 1.7.1 are provided with rotating shaft 1.7.2, and the outer end of this rotating shaft 1.7.2 is rotatably assorted with the shaft seat 1.7.3 being located on the bottom nozzle 1.7.0 of described conical shell; The same lateral edges of each wind direction blade 1.7.1 and the wind direction of an axial distribution are controlled cable and are fixedly linked, and are provided with the hollow connecting rod 1.7.4 being sheathed on described wind direction control cable between adjacent wind direction blade 1.7.1; Wind direction is controlled the two ends of cable and is extended described conical shell and be connected with a pair of wind direction adjusting handle 1.7.8 that is located at tower top 1.1 tops respectively, this is a pair of coordinated type handwheel to wind direction adjusting handle 1.7.8, for wind direction described in folding and unfolding respectively control cable and control described each wind direction blade 1.7.1 towards, and then adjusting wind direction, make hot blast shower nozzle 1.7 hot blasts of output and the inwall of barrel-type tower body 1.2 tangent.After each wind direction blade 1.7.1 regulates and puts in place, described a pair of handwheel adopts position-limit mechanism to fix.
Described hot blast shower nozzle 1.7 is provided with volume damper 1.8 with the body that minute vane 1.6 is connected, and for making the air output of each hot blast shower nozzle 1.7 identical, so that the whirlwind air quantity of each hot blast shower nozzle output is basically identical, and then makes granulation effect basically identical.
The both sides that described wind direction is controlled cable are distributed with this wind direction and control the assist with cable that cable is parallel and be fixedly linked with the same lateral edges of each wind direction blade 1.7.1, so that each wind direction blade 1.7.1 keeping parallelism.In this assist with cable, be arranged with the hollow connecting rod 1.7.4 between adjacent wind direction blade 1.7.1, the length of each hollow connecting rod 1.7.4 is consistent with the spacing of described adjacent wind direction blade 1.7.1, to play a supporting role, and prevent wind direction blade 1.7.1 distortion.
Described pressure nozzle 1.5 comprises one, and to be sphere, arc angle be that the air-flow that dusts of 120 °-130 ° divides sheet 1.5.1, this air-flow that dusts divides and on sheet 1.5.1, is evenly equipped with flour opening 1.5.0, the center line axial distribution of each flour opening 1.5.0, so that the dry powder of ejection evenly scatters in all angles that make progress.
Described air-distribution device 7.1 is connected with the top outlet inlet of boiling air heat exchanger 35, and this boiling air heat exchanger comprises: the heat exchange unit that multilayer upper-lower seal connects and the preheating unit that is sealedly attached to the heat exchange unit below of bottom; This preheating unit comprises the multilayer that upper-lower seal connects; The bottom air intake vent of the preheating unit 35.2 in the bottom is connected with the air outlet of a spraying air blast; The thermal medium entrance of each heat exchange unit is connected with saturated steam carrier pipe, the thermal medium outlet of each heat exchange unit is connected with the thermal medium entrance of each preheating unit by after a steam trap, the thermal medium outlet output condensed water of each preheating unit, this condensed water is sent back to boiler, regenerates the described saturated steam that is not less than 130 ℃.
Discharging opening at the bottom of described taper tower is connected with the feeding mouth of horizontal boiling bed through the first Blowing stopper.
The method of work of above-mentioned drying system, it comprises: the described atomizer 1.4 in Centrafugal spray drying tower and pressure nozzle 1.5 be the downward respectively spray powder of spraying, make progress simultaneously, a hot blast shower nozzle 1.7 is exported a blast of hot air simultaneously, multiply hot blast is downward along the spiral inner wall of tower body 1.2, it is descending and contact, be bonded to plastochondria with dry powder particle that multiply whirlwind carries droplet, and 1.3 collecting moulding pellet at the bottom of described taper tower, pellet is exported through Blowing stopper.
As the scheme of optimizing, the relative velocity of the droplet of the spacing of atomizer 1.4 and pressure nozzle 1.5, atomizer 1.4 ejections and the dry powder of pressure nozzle 1.5 ejections, is suitable for making droplet and dry powder to cross completely and makes its intersection just cover the cross section of tower body 1.2.
The method of work of above-mentioned drying system, it comprises: the shake cylinder alternation of described central dividing plate both sides, when a shake cylinder starts to move, the described butterfly valve of homonymy is closed; Meanwhile, be held open with the butterfly valve of another shake cylinder homonymy.
The technique effect that the present invention has:
(1) mode that spray downwards in employing of the present invention top, bottom makes progress spray powder, with respect to the spraying that makes progress, adopts spraying be downwards suitable for making the further refinement of droplet and increase droplet density, guarantees that droplet is abundant with dry powder, high density contacts; In addition, in the descending process of droplet, the particle fines in droplet is rapidly adhesive half wet condition and is bonded to oncoming dry powder the plastochondria that overall humidity is lower, so granulate and be dried without using binding agent just can realize;
(2) when dryer group of the present invention is worked, the multiply hot blast of each hot blast shower nozzle output forms multiply whirlwind downwards along the spiral inner wall of tower body, it is descending and contact, be bonded to plastochondria with high density dry powder particle that each strand of whirlwind carries high density droplet, multiply whirlwind makes described plastochondria have longer dry trip simultaneously, has guaranteed the drying effect to described plastochondria.Multiply whirlwind plays cleaning effect to the inwall of drying tower simultaneously, prevents that material from gluing wall, coking;
(3) hot blast shower nozzle of the present invention adopt wind adjustable to shutter, guarantee the hot blast that output is tangent with the inwall of barrel-type tower body;
(4) heat exchanger of the present invention is suitable for utilizing flash steam, the hot water preheating gas to be heated that the superheated water of abundant 130 ℃ generates, and has significantly improved utilization efficiency of heat energy;
(5) in horizontal boiling bed of the present invention, be provided with agitating device, be suitable for improving drying efficiency;
(6) cloth bag in horizontal boiling bed of the present invention adopts air sac sealing, in conjunction with cylinder dither technique, is suitable for fully reclaiming fine granular materials.
Accompanying drawing explanation
For content of the present invention is more likely to be clearly understood, below the specific embodiment by reference to the accompanying drawings of basis, the present invention is further detailed explanation, wherein
Fig. 1 is the structural representation of dryer group of the present invention;
Fig. 2 is the partial structurtes schematic diagram of Centrafugal spray drying tower of the present invention;
Fig. 3 is the B-B profile in Fig. 2;
Fig. 4 is described hot blast shower nozzle and the local enlarged drawing thereof in Fig. 3;
Fig. 5 is the partial enlarged drawing that the air-flow that dusts of described pressure nozzle divides sheet;
Fig. 6 is horizontal boiling bed of the present invention and the cooling bed enlarged drawing of horizontal boiling;
Fig. 7 is the internal structure schematic diagram of horizontal boiling bed of the present invention.
The specific embodiment
Below in conjunction with drawings and Examples, the present invention is described in detail:
As Fig. 1, the spraying granulation fluidized drying unit of the present embodiment, it comprises: Centrafugal spray drying tower 1, this spray drying tower 1 comprises at the bottom of tower top 1.1, tower body 1.2 and the taper tower that upper-lower seal successively connects 1.3; Described tower top 1.1 is provided with minute vane 1.6 being connected with hot-air system.Described hot-air system comprises spray air heat exchanger, and the top outlet inlet of spray air heat exchanger is connected with the air intake vent of described minute vane 1.6 through electric heater 10, the first high temperature high efficiency particulate air filter 9 successively.The bottom air intake vent of spray air heat exchanger 5 is connected with the air outlet of spraying air blast 24, and the air inlet of this air blast 24 is connected with the first first medium effeciency filter 23.
For holding the charging basket 18 of feed liquid, through Mono pump, be connected with described atomizer 1.4.
Described tower body 1.2 is jacket type structure, the top in the chuck chamber of tower body 1.2 is connected with the exhaust outlet of a cooling retaining wall blower fan 12, inwall for cooling column body 1.2, this inwall is used for and the pellet generation heat exchange that completes granulation, make the quick cooling curing of pellet, prevent sticky wall and prevent that inwall is overheated and make material generation coking.
The bottom air intake vent of described spray air heat exchanger 5 is connected with the air outlet of spraying air blast 24, and the top outlet inlet of described spray air heat exchanger 5 is connected with the air intake vent of described minute vane 1.6 through electric heater 10, the first high temperature high efficiency particulate air filter 9 successively.The air inlet of described air blast 24 is connected with the first first medium effeciency filter 23.
At the bottom of described taper tower, 1.3 discharging opening is connected with the feeding mouth of horizontal boiling bed 7 through the first Blowing stopper 1.9, and the bed board top in horizontal boiling bed 7 is provided with electric mixing device 7.4 and dust-removal cloth-bag 7.2 successively.
The discharging opening of described horizontal boiling bed 7 is connected with the feeding mouth of a horizontal boiling cooling bed 8 through a flow control valve 7.3, the discharging opening of this horizontal boiling cooling bed 8 is connected with a screening machine 27 through the second Blowing stopper 26, the finished product pellet outlet of screening machine 27 is connected with the feeding mouth of a weighing-packaging machine 28, and the fine powder outlet of screening machine 27 is connected with Wen's feeder 22 through air conveying line.Wen's feeder 22 is adjustable Wen's feeder, and this Wen's feeder 22 is connected with the discharging opening of the first efficient cyclone separator 21 bottoms.
The air-distribution device 7.1 of described horizontal boiling bed 7 bottoms is connected with the top outlet inlet of boiling air heat exchanger 35 through high temperature high efficiency particulate air filter 32; This boiling air heat exchanger 35 is identical with the structure of described spray air heat exchanger 5.
Described boiling air heat exchanger 35 comprises: the heat exchange unit 35.1 that multilayer upper-lower seal connects and the preheating unit 35.2 that is sealedly attached to heat exchange unit 35.1 belows of bottom; This preheating unit 35.2 comprises the multilayer that upper-lower seal connects; The bottom air intake vent of the preheating unit 35.2 in the bottom is connected with the air outlet of another spraying air blast.
The thermal medium entrance of each heat exchange unit 35.1 is connected with saturated steam carrier pipe, the thermal medium outlet of each heat exchange unit 35.1 is connected with the thermal medium entrance of each preheating unit 35.2 by after a steam trap 11, the thermal medium outlet output condensed water of each preheating unit 35.2, this condensed water is sent back to boiler, regenerates the described saturated steam that is not less than 130 ℃.
During use, the saturated steam of 130 ℃ is sent into each heat exchange unit 35.1 and the superheated water of exporting 130 ℃ after gas converting heat for fluidized drying, this superheated water of 130 ℃ generates flash steam after described steam trap 11, and be the vapour-liquid admixture of 100 ℃, and send into each preheating unit 35.2 heat exchange, for fluidized drying gas described in preheating; The gas being preheated successively heats through each heat exchange unit 35.1 again, finally reaches required temperature.
In the heat transfer process of each heat exchange unit 35.1, the saturated steam of 130 ℃ is emitted covert heat in the process that is condensed into 130 ℃ of water, makes the heat exchange coil in each heat exchange unit 35.1 remain at 130 ℃; And then make fluidized drying after successively heat exchange, substantially reach 120 ℃ with gas.
The superheated water of described 130 ℃ is sent into after described steam trap 11 to each preheating unit 35.2, with fluidized drying gas described in preheating, be beneficial to raising thermal energy conversion efficiency, with energy-conservation.
The cold wind blast pipe 8.1 of the bottom of described horizontal boiling cooling bed 8 is connected with a cooled dehumidifier unit 29 through high efficiency particulate air filter 30.
When the pellet aridity of some type of spray drying tower 1 output is inadequate, adopt the further dry described pellets of horizontal boiling bed 7.When the pellet aridity of spray drying tower 1 output is up to standard, see and omit horizontal boiling bed 7, directly adopt described horizontal boiling cooling bed 8 to carry out cooling described pellet.
At the bottom of contiguous described taper tower, the top of 1.3 discharging opening is provided with air draft pipeline 20, and air draft pipeline 20 is connected with the second efficient cyclone separator 14, spraying air-introduced machine 15 successively.The bottom discharge mouth of the first cyclone separator 14 is connected with the feeding mouth of described horizontal boiling bed 7 through a Blowing stopper.

Claims (3)

1. a horizontal boiling bed, it is characterized in that comprising: housing, be located at the boiling bed board in this housing, the exhaust outlet that the air-distribution device of hot blast is provided and is located at case top for the bottom from described boiling bed board, in housing, above this boiling bed board, be provided with successively electric mixing device and a plurality of dust-removal cloth-bag;
The middle and upper part of interior, contiguous this housing of described housing is provided with central dividing plate, and the top margin of this central dividing plate is connected with the inner wall sealing of described housing with dual-side; Described dust-removal cloth-bag comprises a plurality of cloth bags that are distributed in these central dividing plate both sides; bottom opening in each cloth bag of described central dividing plate homonymy is fixed on a base fabric; on this base fabric, be distributed with the through hole being connected with the bottom opening of described cloth bag respectively; each base fabric is separately fixed on the support ring of the dividing plate both sides that mediate; the surrounding of each support ring is fixed with pressure bladder, and each pressure bladder after inflation is suitable for making being sealed and matched between each support ring and central dividing plate and between each support ring and the inwall of described housing; Top in each cloth bag of described central dividing plate homonymy is connected with the piston rod of a shake cylinder, for controlling the alternately shake of cloth bag of described central dividing plate both sides; Described exhaust outlet comprises and is distributed in a pair of of described central dividing plate both sides, and each exhaust outlet is provided with butterfly valve.
2. the spraying granulation fluidized drying system of the described horizontal boiling bed claimed in claim 1 of application, is characterized in that comprising Centrafugal spray drying tower, at the bottom of it comprises tower top, tower body and the taper tower that upper-lower seal connects successively;
Tower top bottom center is provided with atomizer, is provided with the pressure nozzle for the spray powder that makes progress in this spray drying tower and under described atomizer; Described tower top is provided with minute vane being connected with hot-air system, and on tower top bottom surface, annular is evenly distributed with a plurality of hot blast shower nozzles that are connected with minute vane, and each hot blast shower nozzle is suitable for the output hot blast tangent with the inwall of barrel-type tower body.
3. according to the spraying granulation fluidized drying system described in claim 2, it is characterized in that: described hot blast shower nozzle comprises: the conical shell that top is connected with described minute vane, on the bottom nozzle of this conical shell, be evenly distributed with a plurality of parallel wind direction blades, the two ends central authorities of each wind direction blade are provided with rotating shaft, and the outer end of this rotating shaft is rotatably assorted with the shaft seat of being located on the bottom nozzle of described conical shell; The same lateral edges of each wind direction blade and the wind direction of an axial distribution are controlled cable and are fixedly linked, and are provided with the hollow connecting rod being sheathed on described wind direction control cable between adjacent wind direction blade; Wind direction is controlled the two ends of cable and is extended described conical shell and be connected with a pair of wind direction adjusting handle of being located at tower top top respectively, this is a pair of coordinated type handwheel to wind direction adjusting handle, for wind direction described in folding and unfolding respectively control cable and control each described wind direction blade towards, make the hot blast of hot blast shower nozzle output and the inwall of barrel-type tower body tangent.
CN201210114069.8A 2012-04-17 2012-04-17 Horizontal boiling bed of spray granulation fluidized drying system Active CN102836672B (en)

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CN201210114069.8A CN102836672B (en) 2012-04-17 2012-04-17 Horizontal boiling bed of spray granulation fluidized drying system
CN201410044753.2A CN103816837B (en) 2012-04-17 2012-04-17 The method of work of the horizontal boiling bed of spraying granulation fluidized drying system
CN201410044835.7A CN103816838B (en) 2012-04-17 2012-04-17 The method of work of spraying granulation fluidized drying system
CN201410045103.XA CN103816839B (en) 2012-04-17 2012-04-17 Spraying granulation fluidized drying system

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CN201410045103.XA Division CN103816839B (en) 2012-04-17 2012-04-17 Spraying granulation fluidized drying system
CN201410044835.7A Division CN103816838B (en) 2012-04-17 2012-04-17 The method of work of spraying granulation fluidized drying system

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CN201410044835.7A Expired - Fee Related CN103816838B (en) 2012-04-17 2012-04-17 The method of work of spraying granulation fluidized drying system
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CN109699986A (en) * 2018-12-29 2019-05-03 明富(上海)健康科技有限公司 A kind of equipment and its production method of industrialized production grease embedding acid particle

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CN103816838B (en) 2016-01-20
CN103816839A (en) 2014-05-28
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CN103816839B (en) 2016-03-30
CN103816837A (en) 2014-05-28
CN103816838A (en) 2014-05-28

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