CN112516611A - Airflow spray type dryer - Google Patents
Airflow spray type dryer Download PDFInfo
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- CN112516611A CN112516611A CN201910876442.5A CN201910876442A CN112516611A CN 112516611 A CN112516611 A CN 112516611A CN 201910876442 A CN201910876442 A CN 201910876442A CN 112516611 A CN112516611 A CN 112516611A
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- 239000007921 spray Substances 0.000 title claims abstract description 75
- 239000012530 fluid Substances 0.000 claims abstract description 36
- 239000000428 dust Substances 0.000 claims abstract description 18
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000003546 flue gas Substances 0.000 claims abstract description 16
- 239000002184 metal Substances 0.000 claims abstract description 15
- 239000007788 liquid Substances 0.000 claims description 54
- 238000009826 distribution Methods 0.000 claims description 25
- 238000004321 preservation Methods 0.000 claims description 13
- 238000009827 uniform distribution Methods 0.000 claims description 13
- 238000005507 spraying Methods 0.000 claims description 9
- 230000002093 peripheral effect Effects 0.000 claims description 8
- 238000009413 insulation Methods 0.000 claims description 4
- 239000003973 paint Substances 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
- 239000002344 surface layer Substances 0.000 claims description 2
- 238000007599 discharging Methods 0.000 claims 1
- 239000007789 gas Substances 0.000 description 29
- 238000001035 drying Methods 0.000 description 6
- 238000000889 atomisation Methods 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 238000001694 spray drying Methods 0.000 description 4
- 239000012717 electrostatic precipitator Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000003595 mist Substances 0.000 description 3
- 239000011324 bead Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000012065 filter cake Substances 0.000 description 1
- 238000007701 flash-distillation Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 235000011837 pasties Nutrition 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 239000012265 solid product Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 239000002966 varnish Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/16—Evaporating by spraying
- B01D1/18—Evaporating by spraying to obtain dry solids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/16—Evaporating by spraying
- B01D1/20—Sprayers
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Nozzles (AREA)
Abstract
The invention relates to an airflow spray type dryer. Airflow spray formula desiccator is including the flue gas pipeline, the desiccator tower body, the pneumatic knocker of a plurality of, main broken system, metal expansion joint, multi-tube dust remover and the tail-fan that sets gradually, be provided with the three hot-blast equipartition board that sets gradually from top to bottom in the desiccator tower body, all wear to be equipped with a plurality of three-fluid spray gun on the three hot-blast equipartition board, every three-fluid spray gun extends down along vertical direction, a plurality of pneumatic knocker set up in on the bottom lateral wall of desiccator tower body, main broken system install in the bottom of desiccator tower body, metal expansion joint transverse connection in one side of main broken system, the feed opening towards ground is seted up to the bottom of multi-tube dust remover, the tail-fan connect in top one side of multi-tube dust remover. The spray gun of the airflow spray type dryer is simple in structure and convenient for controlling the size of fog drops.
Description
Technical Field
The invention relates to an airflow spray type dryer.
Background
Air-flow spray dryers are a widely used process in the liquid process forming and drying industry. Is suitable for producing powdery and granular solid products from solution, emulsion, suspension and pasty liquid raw materials. Spray drying is therefore a highly desirable drying process when the particle size distribution, residual moisture content, bulk density and particle shape of the finished product must meet exacting criteria. However, the nozzle structure of the general air flow type spray dryer is complicated, and it is not easy to control the size of the mist droplets.
Disclosure of Invention
Accordingly, there is a need for an air-jet spray dryer having a simple nozzle structure and capable of easily controlling the size of mist droplets.
An air flow spray type dryer comprises a flue gas pipeline, a dryer tower body, a plurality of pneumatic knockers, a main crushing system, a metal expansion joint, a multi-pipe dust remover and a tail fan, wherein the flue gas pipeline, the dryer tower body, the plurality of pneumatic knockers, the main crushing system, the metal expansion joint and the tail fan are sequentially arranged, three hot air uniform distribution plates are sequentially arranged in the dryer tower body, a plurality of three-fluid spray guns are arranged on the three hot air uniform distribution plates in a penetrating mode, each three-fluid spray gun extends downwards along the vertical direction, the plurality of pneumatic knockers are arranged on the side wall of the bottom of the dryer tower body, the main crushing system is arranged at the bottom of the dryer tower body, the metal expansion joint is transversely connected to one side of the main crushing system, a feed opening facing the ground is formed in the bottom of the multi-pipe dust remover, the tail fan is connected to one side, the three-fluid spray gun comprises a shell, a heat preservation ring sleeve, a main air pipe, a liquid inlet pipe and an auxiliary air pipe, wherein the heat preservation ring sleeve is arranged in the shell, the main air pipe is inserted into the heat preservation ring sleeve, the liquid inlet pipe is inserted into the main air pipe, a main air channel is formed between the main air pipe and the liquid inlet pipe, the outer side wall of the main air channel is coated with high-temperature heat insulation paint, the auxiliary air pipe is inserted into the liquid inlet pipe, a liquid inlet channel is formed in the auxiliary air pipe and the liquid inlet pipe, an auxiliary air channel is formed in the auxiliary air pipe, the auxiliary air channel is communicated with the liquid inlet channel at the spraying end to form a first outlet, and a second outlet surrounding the first outlet is formed at the spraying end of the main air channel.
In one embodiment, the second outlet is separated from the first outlet, a supporting ring rib is formed on the shell, a metal expansion joint is arranged at the joint of the flue gas pipeline and the dryer tower body, a main supporting seat is arranged at the bottom of the dryer tower body, the main supporting seat is welded with the inner wall of the dryer tower body to form a whole, an auxiliary supporting seat is arranged on the circumferential surface of the upper portion of the dryer tower body, and the auxiliary supporting seat is welded with the steel structure of the dryer tower body to form a whole.
In one embodiment, the spray end of each of the three-fluid spray guns is located within the dryer tower and the connection end of the three-fluid spray gun is located outside the top of the dryer tower.
In one embodiment, a transverse cavity, a first conical cavity and a second conical cavity are formed at the connecting end of the three-fluid spray gun, and a main gas connector, a liquid inlet connector and an auxiliary gas connector are arranged on the connecting end of the three-fluid spray gun, the transverse cavity transversely extends, one end of the transverse cavity is communicated with the main gas channel, the other end of the transverse cavity is connected with the main gas connector, the conical cavity is coaxially connected with the liquid inlet channel, the edge of the end of the conical cavity is connected with the liquid inlet connector, one end of the second conical cavity is coaxially connected with the auxiliary gas channel, and the other end of the second conical cavity.
In one embodiment, the primary gas connector is located at a side of the connection end, and the secondary gas connector and the liquid inlet connector are located on an end face of the connection end.
In one embodiment, each of the hot air uniform distribution plates is a circular plate, and includes a support rib and a uniform distribution plate body fixed on the support rib, and the uniform distribution plate body is provided with air distribution mesh holes.
In one embodiment, the uniform distribution plate body is formed with a central circular area and a plurality of peripheral sectors surrounding the central circular area.
In one embodiment, the diameters of the air distribution holes of the three hot air uniform distribution plates are all equal, the distance between every two adjacent air distribution holes is defined as a first distance, and the first distances of the three hot air uniform distribution plates are gradually increased along the vertical downward direction.
In one embodiment, the upper part and the lower part of the dryer tower body are provided with observation doors, and the peripheral surface of the dryer tower body is provided with a heat preservation sealing surface layer.
In one embodiment, a conical cylinder is formed at the bottom of the dryer tower, the main crushing system is installed at the bottom of the conical cylinder, and the plurality of pneumatic rappers are arranged on a straight cylinder section of the dryer tower and the outer side wall of the conical cylinder.
In the airflow type spray drying device, the structure of the three-fluid spray gun is simple, and the airflow type nozzle has high operation elasticity, namely, the handling capacity has certain flexibility, so that the size of the fog drops can be easily controlled by adjusting the gas-liquid ratio. The purpose of the heat-insulating ring sleeve of the three-fluid spray gun is mainly to reduce the temperature of the spray gun and prevent concentrated liquid from scaling on the wall of the spray gun, high-temperature heat-insulating paint is coated on the outer wall of a main air channel of the spray gun, and then heat-insulating material filling and outer wall manufacturing are carried out.
Drawings
Fig. 1 is a schematic plan view of an air flow spray dryer according to an embodiment.
Fig. 2 is a top view of the air flow spray dryer of fig. 1.
Fig. 3 is a schematic plan view of a hot air distribution plate according to an embodiment.
FIG. 4 is a cross-sectional view of an embodiment of a three-fluid spray gun.
Fig. 5 is a partial enlarged view of a portion a in fig. 4.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The invention relates to an airflow spray type dryer. For example, airflow spray formula desiccator is including the flue gas pipeline, the desiccator tower body, the pneumatic knocker of a plurality of, main broken system, metal expansion joint, multitube dust remover and the tail-fan that set gradually, be provided with the hot-blast equipartition board that three set gradually from top to bottom in the desiccator tower body, all wear to be equipped with a plurality of three-fluid spray gun on the three hot-blast equipartition board. For example, each of the three-fluid spray guns extends downward in a vertical direction, and a plurality of the pneumatic rappers are arranged on the bottom side wall of the dryer tower body. For example, the main crushing system is installed at the bottom of the dryer tower, the metal expansion joint is transversely connected to one side of the main crushing system, and a feed opening facing the ground is formed in the bottom of the multi-tube dust collector. For example, the tail fan is connected to one side of the top of the multi-tube dust collector, each three-fluid spray gun is provided with a connecting end and a spraying end which are arranged oppositely, each three-fluid spray gun comprises a shell, a heat preservation ring sleeve, a main air tube, a liquid inlet tube and an auxiliary air tube, the heat preservation ring sleeve is arranged in the shell, and the main air tube is inserted in the heat preservation ring sleeve. For example, the liquid inlet pipe is inserted into the main gas pipe, and a main gas channel is formed between the main gas pipe and the liquid inlet pipe. For example, the auxiliary air pipe is inserted into the liquid inlet pipe, a liquid inlet channel is formed in the auxiliary air pipe and the liquid inlet pipe, and an auxiliary air channel is formed in the auxiliary air pipe. For example, the secondary air channel communicates with the inlet channel at the spray end to form a first outlet, and the primary air channel forms a second outlet at the spray end surrounding the first outlet.
Referring to fig. 1 to 2 and 4 to 5, an air flow spray dryer includes a flue gas duct 10, a dryer tower 20, a plurality of pneumatic rappers 30, a main crushing system 40, a metal expansion joint 50, a multi-tube dust collector 60 and a tail air blower 70, which are sequentially arranged, three hot air distribution plates 25 are sequentially arranged in the dryer tower 20, a plurality of three-fluid spray guns 28 are respectively arranged on the three hot air distribution plates 25, each three-fluid spray gun 28 extends downwards along a vertical direction, the plurality of pneumatic rappers 30 are arranged on a side wall of the bottom of the dryer tower 20, the main crushing system 40 is arranged at the bottom of the dryer tower 20, the metal expansion joint 50 is transversely connected to one side of the main crushing system 40, a feed opening 61 facing the ground is arranged at the bottom of the multi-tube dust collector 60, the tail air blower 70 is connected to one side of the top of the multi-tube dust collector 60, each of the three-fluid spray guns 28 is formed with an oppositely disposed attachment end 281 and a spray end 285, the three-fluid spray gun 28 comprises a shell 282, a heat preservation ring sleeve 283, a main air pipe 284, an air inlet pipe 286 and a secondary air pipe 287, the heat-insulating ring sleeve 283 is arranged in the shell 282, the main air pipe 284 is inserted in the heat-insulating ring sleeve 283, the liquid inlet pipe 286 is inserted into the main gas pipe 284, a main gas channel 2845 is formed between the main gas pipe 284 and the liquid inlet pipe 286, the auxiliary air pipe 287 is inserted into the liquid inlet pipe 286, a liquid inlet channel 2865 is formed in the auxiliary air pipe 287 and the liquid inlet pipe 286, a secondary air channel 2875 is formed in the secondary air pipe 287, the secondary air channel 2875 is communicated with the liquid inlet channel 2865 at the spraying end 285 to form a first outlet, the primary air channel 2845 forms a second outlet at the spray end 285 that surrounds the first outlet.
For example, in the air current spray drier of this application, this set of system adopts the concentrated liquor of flash distillation concentration to carry out drying process to the concentrated liquor of concentrated liquor spray drying's mode, and the ash content is carried to the sediment storehouse through the strength ash conveying mode, and during the design of drying tower structure, the circumstances such as flue gas distribution, desulfurization concentrated liquor waste water flow, outlet temperature have fully been considered, thereby the simulation actual waste water drying's process of mode such as numerical value flow field simulation is taken to avoid the circumstances such as tower wall scale deposit. The nozzle that this scheme adopted arranges on tower body upper portion, arranges perpendicularly, and the flue gas gets into from tower body upper portion, and the lower part is discharged, and the thick liquid is atomized through the three-fluid nozzle, and after the evaporation of high temperature flue gas, the ash content that produces is collected alone through the pipe dust remover behind the drying tower through the mode of removing dust in advance, and the main building dry slag system is sent into to the form of rethread pneumatic conveying. The system is through reasonable selection flue gas volume, and the flue gas temperature of emission is unanimous with original electrostatic precipitator flue gas temperature, can furthest avoid the influence to original electrostatic precipitator, and steam and solid phase material after the preliminary treatment are carried to electrostatic precipitator entry flue through increasing the fan after getting rid of a large amount of granules by the tubular dust remover. In the present application, the main design parameters of the spray drying tower are specified below.
| Item | Parameters of | Single position |
| Extracted flue gas temperature | 350-360 | ℃ |
| Temperature range of outlet air | 130-160 | ℃ |
| Design of air intake and extraction of smoke point pressure | -2100 | pa |
| Concentrate throughput | 2.5 | m³/h |
| Solid content of inlet concentrated solution | 25-35% | |
| Water content of dry ash | ≦5% |
The air flow type nozzle generally performs film-like atomization, and therefore mist droplets are fine. When the relative gas-liquid velocity is high enough, a normal atomization state is a conical film filled with air, and the film is expanded and enlarged continuously and then is split into superfine droplets. The air is filtered and heated, and enters an air distributor at the top of the dryer, the rotary motion generated by hot air is rectified by a rectifying device to form a straight line parallel to the axis of the tower body, the feed liquid passes through a nozzle at the top of the tower body to form fine vaporous liquid beads, and the vaporous liquid beads are in parallel flow contact with the hot air and can be dried into a finished product within a short time. The dried finished product is continuously discharged by the multi-tube dust collector 60, and the tail gas is discharged outdoors by the induced draft fan. The nozzle of the airflow type spray dryer is designed into a three-fluid airflow type nozzle, the three-fluid airflow type nozzle is provided with a nozzle with a liquid channel and two gas channels, gas and liquid are contacted and mixed in a mixing chamber in the nozzle, atomized fog drop groups are sprayed out from a spraying port, one of the atomized fog drop groups is a liquid channel, the other two atomized fog groups are gas channels, and the liquid is sandwiched between the gases and atomized by the gases. The airflow type spray dryer has the advantages of easy operation and adjustment of atomization amount and stable operation.
The three-fluid spray gun 28 has the advantages of simple structure and small abrasion, and can atomize low-viscosity or high-viscosity feed liquid (including filter cakes), particularly materials containing a small amount of impurities, so that the application range is wide. The air flow type nozzle obtains fine fog drops. The airflow nozzle has great operation flexibility, certain treating capacity and adjustable gas-liquid ratio, and this can control the size of fog drop and the granularity of product.
For example, in order to adjust the atomization amount, the second outlet is separated from the first outlet, and the housing 282 has a support ring rib 2825 formed thereon. The spray end 285 of each of the three-fluid spray guns 28 is located within the dryer tower 20 and the connection end 281 of the three-fluid spray guns 28 is located outside the top of the dryer tower 20. A transverse cavity 271, a first conical cavity 272 and a second conical cavity 273 are formed at a connecting end 281 of the three-fluid spray gun 28, and a main gas connector 274, a liquid inlet connector 275 and an auxiliary gas connector 276 are arranged, the transverse cavity 271 transversely extends, one end of the transverse cavity 271 is communicated with the main gas channel 2845, the other end of the transverse cavity is connected with the main gas connector 274, the first conical cavity 272 is coaxially connected with the liquid inlet channel 2865, the edge of the end of the first conical cavity is connected with the liquid inlet connector 275, one end of the second conical cavity 273 is coaxially connected with the auxiliary gas channel 2875, and the other end of the second conical cavity 273 is connected with the auxiliary gas connector 276. The primary air connector 274 is located on the side of the connecting end 281, and the secondary air connector 276 and the liquid inlet connector 275 are located on the end face of the connecting end 281. When the atomizing device is used, atomized fog drops are sprayed from the spray outlet, one of the fog drops is a liquid channel, the other two fog drops are gas channels, and the liquid is atomized by the gas between the gases, so that the atomizing amount of the airflow type spray dryer is easy to operate and adjust, and the operation is relatively stable. For example, the outer side wall of the main air passage is coated with a high-temperature insulating varnish. Specifically, the purpose of the insulation ring 283 of the three-fluid spray gun 28 is mainly to reduce the temperature of the spray gun and prevent the concentrated solution from scaling on the wall of the spray gun, and the outer wall of the main gas channel of the spray gun is coated with high-temperature insulation paint, and then is filled with insulation material and manufactured with the outer wall.
Referring to fig. 3, for example, in order to improve the air distribution effect, each of the hot air distribution plates 25 is a circular plate, and includes a supporting rib and a distribution plate fixed on the supporting rib, and the distribution plate is provided with air distribution mesh holes 251. The uniform plates are formed with a central circular area 253 and a plurality of peripheral sectors 255, the plurality of peripheral sectors 255 surrounding the central circular area 253. The diameters of the air distribution holes 251 of the three hot air uniform distribution plates 25 are equal, the distance between every two adjacent air distribution holes 251 is defined as a first distance, and the first distances of the three hot air uniform distribution plates 25 are gradually increased along the vertical downward direction. The upper portion and the lower part of desiccator tower body 20 all are provided with observation door 29, the global of desiccator tower body 20 is provided with heat preservation surface course 24. The bottom of the dryer tower body 20 is provided with a conical cylinder 23, the main crushing system 40 is arranged at the bottom of the conical cylinder 23, and the plurality of pneumatic rappers 30 are arranged on the outer side wall of the conical cylinder 23. The air distribution effect can be improved by designing the space between the air distribution meshes 251 of the three hot air uniform distribution plates 25.
For example, in order to prevent the dryer tower 20 from deforming during high-temperature operation, a metal expansion joint 51 is disposed at an air inlet of the dryer tower 20 (a connection portion between the flue gas duct 10 and the dryer tower 20), and a metal expansion joint 50 is disposed at an air outlet of the dryer tower 20; the bottom of desiccator tower body 20 is provided with main supporting seat 201, main supporting seat 201 forms integratively with the inner wall welding of desiccator tower body 20, the global auxiliary stay 202 that is provided with in upper portion of desiccator tower body 20, auxiliary stay 202 with the steel structure welding of desiccator tower body 20 forms integratively, just so can form tower body and heat retaining protection.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. An air flow spraying type dryer is characterized by comprising a flue gas pipeline, a dryer tower body, a plurality of pneumatic knockers, a main crushing system, a metal expansion joint, a multi-pipe dust collector and a tail fan which are sequentially arranged, wherein three hot air uniform distribution plates which are sequentially arranged from top to bottom are arranged in the dryer tower body, a plurality of three-fluid spray guns are arranged on the three hot air uniform distribution plates in a penetrating mode, each three-fluid spray gun extends downwards along the vertical direction and is arranged on the side wall of the bottom of the dryer tower body, the main crushing system is arranged at the bottom of the dryer tower body, the metal expansion joint is transversely connected to one side of the main crushing system, a discharging opening facing the ground is formed in the bottom of the multi-pipe dust collector, the tail fan is connected to one side of the top of the multi-pipe dust collector, and each three-fluid spray gun is provided with a connecting end and a spraying end which are, the three-fluid spray gun comprises a shell, a heat preservation ring sleeve, a main air pipe, a liquid inlet pipe and an auxiliary air pipe, wherein the heat preservation ring sleeve is arranged in the shell, the main air pipe is inserted into the heat preservation ring sleeve, the liquid inlet pipe is inserted into the main air pipe, a main air channel is formed between the main air pipe and the liquid inlet pipe, the outer side wall of the main air channel is coated with high-temperature heat insulation paint, the auxiliary air pipe is inserted into the liquid inlet pipe, a liquid inlet channel is formed in the auxiliary air pipe and the liquid inlet pipe, an auxiliary air channel is formed in the auxiliary air pipe, the auxiliary air channel is communicated with the liquid inlet channel at the spraying end to form a first outlet, and a second outlet surrounding the first outlet is formed at the spraying end of the main air channel.
2. The airflow atomizing dryer as claimed in claim 1, wherein said second outlet is isolated from said first outlet, said shell has a supporting ring rib, said flue gas duct is connected to said dryer tower by a metal expansion joint, said dryer tower has a main supporting seat at its bottom, said main supporting seat is welded to an inner wall of said dryer tower, said dryer tower has an auxiliary supporting seat at its upper peripheral surface, and said auxiliary supporting seat is welded to a steel structure of said dryer tower.
3. The airflow spray dryer of claim 2 wherein the spray end of each said three-fluid spray gun is located within said dryer tower and the connection end of said three-fluid spray gun is located outside the top of said dryer tower.
4. The airflow spray dryer according to claim 1, wherein a transverse cavity, a first conical cavity and a second conical cavity are formed at the connecting end of the three-fluid spray gun, and the three-fluid spray dryer is provided with a main air connector, a liquid inlet connector and an auxiliary air connector, the transverse cavity extends transversely, one end of the transverse cavity is communicated with the main air channel, the other end of the transverse cavity is connected with the main air connector, the conical cavity is coaxially connected with the liquid inlet channel, the edge of the end of the conical cavity is connected with the liquid inlet connector, one end of the second conical cavity is coaxially connected with the auxiliary air channel, and the other end of the second conical cavity is connected with the auxiliary air connector.
5. The airflow spray dryer of claim 4 wherein said primary air connection is located on the side of said connection end and said secondary air connection and said inlet connection are both located on the end face of said connection end.
6. The airflow spray dryer according to claim 1, wherein each of the hot air distribution plates is a circular plate, and includes a support rib and a distribution plate body fixed on the support rib, and the distribution plate body is provided with air distribution mesh holes.
7. The airflow spray dryer of claim 6 wherein said distributor plate has a central circular area and a plurality of peripheral sectors formed thereon, said plurality of peripheral sectors surrounding said central circular area.
8. The airflow spray dryer of claim 1, wherein the diameters of the air distribution holes of the three hot air distribution plates are all equal, the distance between every two adjacent air distribution holes is defined as a first distance, and the first distances of the three hot air distribution plates are gradually increased along a vertical downward direction.
9. The airflow spray dryer of claim 1, wherein the upper part and the lower part of the dryer tower body are provided with observation doors, and the peripheral surface of the dryer tower body is provided with a heat preservation sealing surface layer.
10. The airflow spray dryer of claim 1, wherein the bottom of the dryer tower is formed with a conical cylinder, the main crushing system is mounted at the bottom of the conical cylinder, and the plurality of pneumatic rappers are arranged on a straight section of the dryer tower and an outer side wall of the conical cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910876442.5A CN112516611A (en) | 2019-09-17 | 2019-09-17 | Airflow spray type dryer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910876442.5A CN112516611A (en) | 2019-09-17 | 2019-09-17 | Airflow spray type dryer |
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| CN112516611A true CN112516611A (en) | 2021-03-19 |
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| CN201910876442.5A Pending CN112516611A (en) | 2019-09-17 | 2019-09-17 | Airflow spray type dryer |
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| GB1240691A (en) * | 1968-09-26 | 1971-07-28 | Tate & Lyle Refineries Ltd | Improvements in the production of sugar |
| FR2136717A5 (en) * | 1971-04-29 | 1972-12-22 | Knapsack Ag | |
| EP0503187A1 (en) * | 1991-03-12 | 1992-09-16 | Ohkawara Kakohki Co., Ltd. | Two-fluid pressure nozzle of upward injection type |
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