CN207012580U - A kind of spray drying device - Google Patents

Abstract

The utility model discloses a kind of spray drying device, it is related to drying-granulating apparatus field, including frame and the material pot being fixed in frame, spray dryer, the air heating tank of thermal source is provided, cyclone separator, the material pot is connected with the nozzle at the top of spray dryer, the material outlet of the spray dryer is connected with the charging aperture of cyclone separator, it is additionally provided with residual heat using device, the residual heat using device is located between the protection gas entrance of nozzle and the escape pipe of cyclone separator, residual heat using device is by the air exhauster that is connected with each other, adsorption tanks form, the utility model takes full advantage of hot gas waste heat, reduce heat leakage, reduce environmental pollution, solvent in hot gas, which reduces, is advantageous to dried material, improve drying efficiency；Before lateral air inlet, it is gently predrying to have carried out lockup in the presence of gas is protected, and ensure that shaping particles quality, and preforming particle is larger, is not susceptible to wall sticking phenomenon, and then adds the effect of anti-sticking wall.

Description

A kind of spray drying device

Technical field

It the utility model is related to drying-granulating apparatus field, and in particular to a kind of spray drying device.

Background technology

Spray dryer is the common apparatus for producing the heat-sensitive materials such as powdered food, medicine, biological products at this stage.Spray The principle of heating of mist drying machine is suction air and is raised temperature using electric heating tube or steam, then makes device interior air Circulate hot-air, and the feed liquid of atomization process is carried out into flash evapn forms dry powder, and dry powder reaches with flowing to for hot-air By powder drum, and hot-air is discharged from the exhaust outlet of exhaust blower.

In the spray dryer course of work, liquid material is sprayed into trickle misty liquid droplets through liquid material atomising device, Contacted with hot blast cocurrent or countercurrent, drying is powder finished product within the extremely short time.Finished product is continuously exported by drying tower bottom, Waste gas material containing micronic dust collects or washed emptying by cloth bag collector.Yet with liquid material be atomized into after droplet directly with High-temperature hot-air contacts, and top layer material, which can occur rapidly to dry, forms shell, internal as temperature constantly raises, after moisture therein Continuous evaporation process forms pressure, causes the microballoon that appearance is molded easily to burst, and produces special-shaped and a large amount of fine powders, therefore above-mentioned There are the following problems for spray dryer：The atomizing particle size distribution of atomizer is wide, it is larger to produce fine powder amount；The particle of shaping Easily there is abnormity, sphericity is not high；To ensure drying effect, outlet exhaust temperature is higher, carries a large amount of waste heats and fails abundant profit With.

Meanwhile just discharged, wasted from the exhaust outlet discharge of exhaust blower for existing spray dryer, hot-air Substantial amounts of heat, and there is the production of pollution gas for some, often it is mingled with to environment in the hot-air of discharge The pollutant of harm is produced, directly discharge influences environment.

The patented technology of Patent No. 201120356913.9 provides a kind of apparatus for reusing residual heat, including dry with spraying The air intake and be arranged near the air inlet of heating bucket of the spray dryer that the air outlet of the exhaust blower of dry machine connects Outlet air end, the outlet air end connect the air intake, and the outlet air end has an air port, and the air port is towards the spray drying Machine heats the air inlet of bucket, and the apparatus for reusing residual heat is that misclosure waste heat recycles structure, has certain waste heat recovery Effect, but substantial amounts of heat leakage be present, while pollutant therein still distributes and environment is polluted in air, it is secondly, sharp again Contain substantial amounts of solvent in hot gas, do not utilize dry progress.

Changzhou Suncheer Drying Equipment Co., Ltd.'s number of patent application is 201520267552.9 and 201520267553.3 The material that two utility model patents each provide spray dryer glues wall degree monitoring device and the viscous wall removing device of material, Wherein material glues wall degree monitoring device：Including monitoring modular, guide rail and high Accuracy Electronic Balance；Centrifugal spray dryer Arc groove is provided with side wall, the bottom of arc groove is communicated with the fine crack of centrifugal spray dryer inner drying chamber；Institute Guide rail is stated to be fixed on centrifugal spray dryer；The monitoring modular slides up and down with guide rail to be connected, and its detection part It can be rotated in arc groove；The high Accuracy Electronic Balance is used for the viscous wall material tested on the detection part of monitoring modular Weight, monitoring modular are slided up and down with guide rail and are connected, and its detection part can rotate in arc groove, and this structure can carry Gathered for on-line sample and glue wall degree and monitor two kinds of functions, it is simple in construction, it is easy to operate；Material glues wall removing device：Bag Include power supply, electromagnet and permanent magnet；The electromagnet and power electric connection；The electromagnet and permanent magnet respectively with centrifugal spray The outer wall and inwall of the hothouse of mist drying machine are slidably connected, by solenoid actuated permanent magnet along centrifugal spray dryer Hothouse circumferentially rotating and sliding up and down, strike off the viscous wall material of diverse location with this.

It is not difficult to draw, to reduce wall sticking phenomenon, prior art, should by way of setting detection module and actively striking off Problems be present in technological means：Detection module there may be to be surveyed by mistake；Wall operation is scraped not apply to for bulky drying tower；It is viscous Wall material may can not work Nian Jie inside permanent magnet and drying tower.

Utility model content

The utility model provides a kind of spray drying device, with solve existing spray dryer grain forming effect it is poor, Heat utilization rate is low, pollution environment, the technical problem for being difficult to elimination wall sticking phenomenon.

In order to solve the above-mentioned technical problem, the technical solution adopted in the utility model is summarized as follows：

A kind of spray drying device, including frame and be fixed in frame material pot, spray dryer, provide thermal source Air heating tank, cyclone separator, the material pot is connected with the nozzle at the top of spray dryer, the spray dryer Material outlet be connected with the charging aperture of cyclone separator, be additionally provided with residual heat using device, wherein：

The spray dryer includes the tower body of upper and lower ends opening and covers the upper lid of tower body upper end, on the upper lid The nozzle being connected with towards inside tower body, the nozzle include the inside and outside jet pipe being arranged and protection tracheae, the protection tracheae outer end Close and be passed through the inner end opening inside spray dryer tower body, protect and at least one protection gas entrance, institute are offered on tracheae State jet pipe outer end and be arranged to material inlet, the inner end that jet pipe is passed through inside spray dryer tower body is connected with nozzle head, the nozzle Head is provided with the material jet towards spray dryer tower body internal spray material, and the material jet is positioned at protection tracheae It is interior；The tower body is arranged interior tower body and outer tower body forms by inside and outside, and the top of the interior tower body and outer tower body is mutually solid with upper lid Fixed, the cavity formed between interior tower body, outer tower body and upper lid is hot gas cavity, is connected with below tower body towards in hot gas cavity Heating pipe, the heating pipe are connected with air heating tank；The interior tower body be arranged respectively to from top to bottom drying section, buffer part with And material outlet, the stomatas being evenly equipped with the side wall of the drying section inside some connection hot gas cavitys and interior tower body；

The residual heat using device is located between protection gas entrance and the escape pipe of cyclone separator, the UTILIZATION OF VESIDUAL HEAT IN dress Put and be made up of air exhauster, the adsorption tanks being connected with each other.

Preferably, the adsorption tanks include the cylinder for being used to accommodate adsorbent of both ends open, the cylinder both ends The end cap for sealed cylinder is equipped with, the contact surface between the end cap and cylinder is equipped with O-ring seal, the end cap Mutually fixed through some connected nails between cylinder, be connected with the ventilation connecting tube extended in cylinder on two end caps, two Ventilation connecting tube is in stagger setting.

Preferably, the air exhauster is provided with two groups, and two groups of air exhausters are connected in the air inlet and outlet of adsorption tanks respectively At mouthful.

Preferably, the annexation between the interior tower body, outer tower body and upper lid is：The upper lid is provided with peace Mounting groove and outer mounting groove, the interior tower body, the upper end of outer tower body are respectively clamped into interior peace in the annular of tower body, outer tower body in dress In tankage, outer mounting groove；Installation ring flat-plate is arranged with the buffer part of the interior tower body, the installation ring flat-plate is provided with annular Mounting groove, the lower end of the outer tower body are caught in lower mounting groove.

Preferably, the air vent aperture in the side wall of the drying section is from top to bottom in decrement shape distribution.

Preferably, the connected mode between heating pipe and the hot gas cavity is：Between heating pipe and hot gas cavity An endless tube is additionally provided with, is connected between the endless tube and heating pipe through at least two along the circumferentially uniform branch pipe of endless tube；It is described It is connected between endless tube and hot gas cavity through at least two along the circumferentially uniform connecting tube of endless tube.

Compared with prior art, beneficial effect caused by the utility model：

1st, the utility model spray drying device, inventive point are：The specially designed nozzle with protection tracheae, there is provided Shaping particles quality；Reduce the gradient of material heating, therefore droplet shape material has the warming-up section of a mitigation, so as to significantly The probability that breakage of particles occurs due to drastically drying is reduced, and droplet shape material can fully be sent out in the mitigation temperature-rise period Type is transformed into, droplet shape material is avoided and tears too fast evaporation in atomization process in the early stage, so as to reduce the formation of special-shaped particle, Improve the sphericity of particle；Hot gas waste heat is taken full advantage of, reduces heat leakage, by the harmful substance in the discarded hot gas of script Absorption, avoid polluting environment, meanwhile, the solvent in hot gas reduces, and is more beneficial for dried material, improves drying efficiency； Heating pipe is no longer arranged at the top of drier, but by way of hot gas cavity is set, uniformly entered from tower body side wall to centre Gas, the air-flow of formation cause material wherein in tower body center section, to avoid material from being bonded in side wall, fundamentally solve thing Expect wall sticking phenomenon；The uniformly combined use to middle air intake structure and residual heat using device structure of tower body side wall, further add The strong effect for avoiding material wall sticking phenomenon, improving drying efficiency and improving dry particle shaping quality, before spraying, in waste heat Under effect, material tentatively rises；After spraying, the drop material for formation of spraying wraps up in protection through waste heat protection gas bag, further lifting Temperature, the most of solvent of evaporation simultaneously produce the particle of preliminarily forming, avoid variable grain in later stage drying process from being bonded；With Hot air flow by from tower body side wall to intermediate injection afterwards, is further dried the liquid in particle；During whole dry materials, The stepped rising of temperature of charge, on the premise of dry particle shaping quality is ensured, the effect of anti-sticking wall is further increased, with reference to Two kinds of results so that respective effect has been strengthened；

2nd, to the setting of adsorption tanks, adsorbent is conveniently replaceable, ensures adsorption effect, is easy to adsorbent reactivation to recycle；

3rd, the current rate in the protection tracheae in guarantee nozzle of the restriction to air exhauster, to realize the protection to material；

4th, the connection between interior tower body, outer tower body and upper lid, it is simple in construction, it is easy to accomplish；

5th, the air vent aperture of upper end is more than the air vent aperture of lower end in the side wall of drying section, avoids upper end hot gas emitted dose It is small, it is impossible to realize drying；And lower end feed liquid content is few, it is necessary to less hot gas, the purpose of reasonable distribution hot gas is realized；

6th, it is provided in balanced air inlet between heating pipe and hot gas cavity so that hot gas cavity everywhere air pressure equalisation, Material is by thermal balance.

Brief description of the drawings

The utility model is described in further detail below in conjunction with the accompanying drawings.

Fig. 1 is the structural representation of spray drying device；

Fig. 2 is the structural representation of spray dryer；

Fig. 3 is the internal structure schematic diagram of nozzle；

Fig. 4 is the structural representation of upper lid；

Fig. 5 is the structural representation of interior tower body；

Fig. 6 is the structural representation of adsorption tanks；

In figure mark for：1st, frame；2nd, material pot；3rd, spray dryer；31st, nozzle；311st, tracheae is protected；3111st, protect Protect gas entrance；312nd, jet pipe；313rd, nozzle head；3131st, material jet；32nd, upper lid；321st, outer mounting groove；322nd, interior installation Groove；33rd, interior tower body；331st, drying section；3311st, stomata；332nd, buffer part；The 333rd, ring flat-plate is installed；3331st, lower mounting groove；334、 Material outlet；34th, outer tower body；35th, connecting tube；36th, endless tube；37th, branch pipe；38th, heating pipe；4th, adsorption tanks；41st, cylinder；42nd, hold Lid；43rd, sealing ring；44th, connected nail；45th, ventilation connecting tube；5th, air heating tank；6th, escape pipe；7th, air exhauster；8th, whirlwind point From device；9th, discharging opening.

Embodiment

The utility model is described in further detail with reference to the accompanying drawings and detailed description.Reality of the present utility model The mode of applying includes but is not limited to the following example.

Embodiment 1

As described in Figure 1, a kind of spray drying device, including frame 1 and the material pot 2 that is fixed in frame 1, spraying are dry Dry device 3, air heating tank 5, the cyclone separator 8 that thermal source is provided, the material pot 2 and the nozzle 31 at the top of spray dryer 3 It is connected, the material outlet of the spray dryer 3 is connected with the charging aperture of cyclone separator 8, and cyclone separator 8 goes out Material mouth 9 is located at the bottom of cyclone separator 8, for collecting dry products, is further provided with residual heat using device, wherein, more have Body：

Referring to Fig. 2, the spray dryer 3 includes the tower body of upper and lower ends opening and the upper lid of covering tower body upper end 32, be connected with towards the nozzle 31 inside tower body on the upper lid 32, the structure of nozzle 31 referring to Fig. 3, the nozzle 31 include it is interior The jet pipe 312 and protection tracheae 311 being arranged outside, protection tracheae 311 outer end are closed and are passed through inside the tower body of spray dryer 3 Inner end opening, protect and at least one protection gas entrance 3111 offered on tracheae 311, the outer end of jet pipe 312 is arranged to thing Expect entrance, the inner end that jet pipe 312 is passed through inside the tower body of spray dryer 3 is connected with nozzle head 313, and the nozzle head 313 is provided with Towards the material jet 3131 of the tower body internal spray material of spray dryer 3, the material jet 3131 is positioned at protection tracheae In 311；The tower body is arranged interior tower body 33 and outer tower body 34 and formed by inside and outside, the top of the interior tower body 33 and outer tower body 34 Fixed with the upper phase of lid 32, the cavity formed between interior tower body 33, outer tower body 34 and upper lid 32 is hot gas cavity, below tower body The heating pipe 38 being connected with towards in hot gas cavity, the heating pipe 38 are connected with air heating tank 5；The interior tower body 33 on to Under be arranged respectively to drying section 331, buffer part 332 and material outlet 334, if being evenly equipped with the side wall of the drying section 331 The stomata 3311 that involvement is led to inside hot gas cavity and interior tower body 33；

The residual heat using device is located between protection gas entrance 3111 and the escape pipe 6 of cyclone separator 8, the waste heat It is made up of using device air exhauster 7, the adsorption tanks 4 being connected with each other.

The setting of residual heat using device structure, its operation principle are：Suitable for the nozzle 31 with protection tracheae 311 and rotation Between the escape pipe 6 of wind separator 8, the hot-air come out from the escape pipe 6 of cyclone separator 8 is reclaimed, and through adsorption tanks 4 Adsorption treatment, then realize UTILIZATION OF VESIDUAL HEAT IN；Hot-air at the escape pipe 6 of cyclone separator 8 adsorbs molten through residual heat using device Through protecting gas entrance to enter the protection tracheae 311 of nozzle 31 after agent, have one before atomization by material in waste heat jet pipe 312 Fixed heating, while protect gas to possess temperature and be less than dry gas and be more than temperature of charge, intermediate buffering effect is played, is greatly reduced The gradient of material heating, therefore droplet shape material has the warming-up section of a mitigation, so as to substantially reduce due to drastically drying The probability of breakage of particles occurs, and droplet shape material can fully develop shaping in the mitigation temperature-rise period, avoid mist Drop-wise material tears the too fast evaporation in atomization process in the early stage, so as to reduce the formation of special-shaped particle, improves the spherical of particle Degree；Hot gas waste heat is taken full advantage of, reduces heat leakage, the noxious substance in the discarded hot gas of script avoids polluting Environment, meanwhile, the solvent in hot gas reduces, and is more beneficial for dried material, improves drying efficiency.

Tower body side wall is uniformly set to middle air intake structure, and its operation principle is：Hot gas enters hot gas sky through heating pipe 38 Chamber, then uniform air inlet is carried out through the inside intermediate material chamber of tower body 33 of stomata 3311, the material of drier top jet is done It is dry, during material declines, there is new drying hot gas to add all the time, during material declines, protected all the time between air-flow and material The higher temperature difference is held, drying effect is good；And conventional materials injection and hot gas are each provided at the structure at top, during material declines, The temperature difference between air-flow and material tapers into, and the steam in its air-flow tends to saturation, and final drying effect is poor, compared to tradition Operating efficiency can be improved 1.5-2 times by structure, the spray dryer that the present embodiment provides；Lateral airflow can effectively avoid thing simultaneously Expect to move to side wall, and then avoid material from being bonded in side wall；Heating pipe 38 is no longer arranged at the top of drier, but by setting The mode of hot gas cavity is put, uniformly causes material wherein in tower body pars intermedia to middle air inlet, the air-flow of formation from tower body side wall Point, avoid material from being bonded in side wall, fundamentally solve material wall sticking phenomenon；Material keeps dry gas stream during declining It is continuously added into, improves operating efficiency.

In the present embodiment, the uniformly combined use to middle air intake structure and residual heat using device structure of tower body side wall, The effect for then further enhance and avoid material wall sticking phenomenon, improving drying efficiency and improving dry particle shaping quality, spray Before mist, under waste heat effect, material tentatively rises；After spraying, the drop material for formation of spraying wraps up in protection through waste heat protection gas bag, Further lift temperature, the most of solvent of evaporation and produce the particle of preliminarily forming, then by tower body side wall to intermediate injection Hot air flow, the liquid in particle is further dried；During whole dry materials, the stepped rising of temperature of charge, On the premise of ensureing dry particle shaping quality, the effect of anti-sticking wall is further increased, with reference to two kinds of results so that respective effect Strengthen.

The present embodiment takes full advantage of hot gas waste heat, reduces heat leakage, by the harmful substance in the discarded hot gas of script Absorption, avoid polluting environment, meanwhile, the solvent in hot gas reduces, and is more beneficial for dried material, improves drying efficiency； Before lateral air inlet, it is gently predrying to have carried out lockup in the presence of gas is protected, and ensure that shaping particles quality, at the same in advance into The particle of type is larger, is not susceptible to wall sticking phenomenon, and then adds the effect of anti-sticking wall.

Embodiment 2

As shown in fig. 6, further optimizing to energy saving and environment friendly residual heat using device, the adsorption tanks 4 include both ends open Be used for accommodate the cylinder 41 of adsorbent, the both ends of cylinder 41 are equipped with the end cap 42 for sealed cylinder 41, the end cap Contact surface between 42 and cylinder 41 is equipped with O-ring seal 43, through some connected nails between the end cap 42 and cylinder 41 44 phases are fixed, and the ventilation connecting tube 45 extended in cylinder 41 are connected with two end caps 42, two ventilation connecting tubes 45 are in mistake Open up and put；The purpose that the present embodiment is set to adsorption tanks, it is to be conveniently replaceable adsorbent, ensures adsorption effect, be easy to adsorbent Regeneration recycles.

Embodiment 3

Energy saving and environment friendly residual heat using device is further optimized, the air exhauster 7 is provided with two groups, and two groups of air exhausters 7 divide It is not connected at air inlet and the gas outlet of adsorption tanks 4, restriction of the present embodiment to air exhauster is the protection tracheae for ensureing nozzle Middle current rate, to realize the protection to material.

Embodiment 4

Referring to Fig. 4, further optimize on the basis of embodiment 1, interior tower body 33, outer tower body 34 and the upper lid 32 Between annexation be：The upper lid 32 is provided with installation in the annular of tower body 33, outer tower body 34 mounting groove 322 and outer Mounting groove 321, the interior tower body 33, the upper end of outer tower body 34 are respectively clamped into interior mounting groove 322, in outer mounting groove 321；It is described Installation ring flat-plate 333 is arranged with the buffer part 332 of interior tower body 33, the installation ring flat-plate 333 is provided with the lower mounting groove of annular 3331, the lower end of the outer tower body 34 is caught in lower mounting groove 3331.

Referring to Fig. 5, the connected mode between the heating pipe 38 and hot gas cavity is：Heating pipe 38 and hot gas cavity it Between be additionally provided with an endless tube 36, through at least two along the circumferential uniform branch pipe of endless tube 36 between the endless tube 36 and heating pipe 38 37 are connected；It is connected between the endless tube 36 and hot gas cavity through at least two along the circumferential uniform connecting tube 35 of endless tube 36.

The structure setting of the present embodiment is rationally simple, it is easy to accomplish；It is provided between heating pipe 38 and hot gas cavity Balanced air inlet so that hot gas cavity everywhere air pressure equalisation, material is by thermal balance.

Embodiment 6

Referring to Fig. 5, further optimize on the basis of embodiment 4, the stomata 3311 in the side wall of the drying section 331 Aperture is from top to bottom in decrement shape distribution；The setting of this implementation causes the hole of the stomata 3311 of upper end in the side wall of drying section 331 Footpath is more than the aperture of the stomata 3311 of lower end, avoids the upper end hot gas emitted dose of drying section 331 small, it is impossible to realize drying；And dry The lower end feed liquid content of portion 331 is few, it is necessary to less supplement hot gas, so the present embodiment realizes the mesh of reasonable distribution hot gas 's.

It is embodiment of the present utility model as described above.The utility model is not limited to above-mentioned embodiment, anyone The structure change made under enlightenment of the present utility model should be learnt, it is every that there is same or like skill with the utility model Art scheme, each falls within the scope of protection of the utility model.

Claims (6)

1. a kind of spray drying device, including frame (1) and the material pot (2), the spray dryer that are fixed in frame (1) (3) air heating tank (5), the cyclone separator (8) of thermal source, are provided, at the top of the material pot (2) and spray dryer (3) Nozzle (31) is connected, and the material outlet of the spray dryer (3) is connected with the charging aperture of cyclone separator (8), and it is special Sign is, is additionally provided with residual heat using device, wherein：

The tower body of the spray dryer (3) including upper and lower ends opening and the upper lid (32) of covering tower body upper end, it is described on It is connected with lid (32) towards the nozzle (31) inside tower body, the nozzle (31) includes the inside and outside jet pipe (312) being arranged and protection Tracheae (311), the closing of described protection tracheae (311) outer end and the inner end opening being passed through inside spray dryer (3) tower body, protection At least one protection gas entrance (3111) is offered on tracheae (311), jet pipe (312) outer end is arranged to material inlet, sprays The inner end that pipe (312) is passed through inside spray dryer (3) tower body is connected with nozzle head (313), and the nozzle head (313) is provided with court The material jet (3131) of spray dryer (3) tower body internal spray material, the material jet (3131) is positioned at protection In tracheae (311)；The tower body is arranged interior tower body (33) and outer tower body (34) forms, the interior tower body (33) and outer tower by inside and outside The top of body (34) is mutually fixed with upper lid (32), the sky formed between interior tower body (33), outer tower body (34) and upper lid (32) Chamber is hot gas cavity, is connected with below tower body towards the heating pipe (38) in hot gas cavity, the heating pipe (38) and is heated with air Tank (5) is connected；The interior tower body (33) is arranged respectively to drying section (331), buffer part (332) and material outlet from top to bottom (334) the internal stomata of some connection hot gas cavitys and interior tower body (33), is evenly equipped with the side wall of the drying section (331) (3311)；

The residual heat using device is located between protection gas entrance (3111) and the escape pipe (6) of cyclone separator (8), described remaining Heat utilization device is made up of air exhauster (7), the adsorption tanks (4) being connected with each other.

A kind of 2. spray drying device as claimed in claim 1, it is characterised in that：The adsorption tanks (4) include both ends open Be used for accommodate the cylinder (41) of adsorbent, cylinder (41) both ends are equipped with the end cap (42) for sealed cylinder (41), Contact surface between the end cap (42) and cylinder (41) is equipped with O-ring seal (43), the end cap (42) and cylinder (41) Between mutually fixed through some connected nails (44), be connected with the ventilation connecting tube extended in cylinder (41) on two end caps (42) (45), two ventilation connecting tubes (45) are in stagger setting.

A kind of 3. spray drying device as claimed in claim 1, it is characterised in that：The air exhauster (7) is provided with two groups, two groups Air exhauster (7) is connected at air inlet and the gas outlet of adsorption tanks (4) respectively.

A kind of 4. spray drying device as claimed in claim 1, it is characterised in that：The interior tower body (33), outer tower body (34) And the annexation between upper lid (32) is：The upper lid (32) is provided with tower body (33), the ring of outer tower body (34) in installation Mounting groove (322) and outer mounting groove (321) in shape, the interior tower body (33), the upper end of outer tower body (34) are respectively clamped into interior peace In tankage (322), outer mounting groove (321)；Buffer part (332) place of the interior tower body (33) is arranged with installation ring flat-plate (333), institute The lower mounting groove (3331) that installation ring flat-plate (333) is provided with annular is stated, the lower end of the outer tower body (34) is caught in lower mounting groove (3331) in.

A kind of 5. spray drying device as claimed in claim 1, it is characterised in that：In the side wall of the drying section (331) Stomata (3311) aperture is from top to bottom in decrement shape distribution.

A kind of 6. spray drying device as claimed in claim 1, it is characterised in that：The heating pipe (38) and hot gas cavity it Between connected mode be：An endless tube (36), the endless tube (36) and hot gas are additionally provided between heating pipe (38) and hot gas cavity It is connected between pipe (38) through at least two along the circumferential uniform branch pipe (37) of endless tube (36)；The endless tube (36) and hot gas cavity Between be connected through at least two along the circumferential uniform connecting tube (35) of endless tube (36).