CN114713138A - Heating type drying equipment with internal heating and external heating and cracking system - Google Patents
Heating type drying equipment with internal heating and external heating and cracking system Download PDFInfo
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- CN114713138A CN114713138A CN202011525215.7A CN202011525215A CN114713138A CN 114713138 A CN114713138 A CN 114713138A CN 202011525215 A CN202011525215 A CN 202011525215A CN 114713138 A CN114713138 A CN 114713138A
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- 238000001035 drying Methods 0.000 title claims abstract description 409
- 238000010438 heat treatment Methods 0.000 title claims abstract description 182
- 238000005336 cracking Methods 0.000 title claims description 54
- 238000007599 discharging Methods 0.000 claims abstract description 60
- 239000000463 material Substances 0.000 claims description 55
- 238000002485 combustion reaction Methods 0.000 claims description 24
- 238000012546 transfer Methods 0.000 claims description 19
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 10
- 239000007789 gas Substances 0.000 description 124
- 238000000197 pyrolysis Methods 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 239000011343 solid material Substances 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 230000002349 favourable effect Effects 0.000 description 4
- 238000001599 direct drying Methods 0.000 description 3
- 239000011344 liquid material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000002912 waste gas Substances 0.000 description 3
- 230000004323 axial length Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J6/00—Heat treatments such as Calcining; Fusing ; Pyrolysis
- B01J6/008—Pyrolysis reactions
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B11/00—Machines or apparatus for drying solid materials or objects with movement which is non-progressive
- F26B11/02—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles
- F26B11/04—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles rotating about a horizontal or slightly-inclined axis
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/001—Drying-air generating units, e.g. movable, independent of drying enclosure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B23/00—Heating arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/06—Chambers, containers, or receptacles
- F26B25/14—Chambers, containers, receptacles of simple construction
- F26B25/16—Chambers, containers, receptacles of simple construction mainly closed, e.g. drum
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/00049—Controlling or regulating processes
- B01J2219/00051—Controlling the temperature
- B01J2219/00157—Controlling the temperature by means of a burner
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- Drying Of Solid Materials (AREA)
Abstract
The application discloses add hot type drying equipment and schizolysis system outside earlier in, add hot type drying equipment outside earlier in and includes: the two ends of the drying inner cylinder are respectively a feeding end and a discharging end; the feeding cover is hermetically covered at the feeding end of the drying inner cylinder and is provided with a feeding hole and a first gas through hole; the discharging cover is hermetically covered at the discharging end of the drying inner cylinder and is provided with a discharging port and a second gas through hole; the two ends of the drying outer cylinder are hermetically sleeved on the periphery of the drying inner cylinder and are provided with a heating gas inlet and a heating gas outlet, and the drying inner cylinder rotates relative to the drying outer cylinder, the feeding cover and the discharging cover which are fixedly arranged; one of the first gas through hole and the second gas through hole is used for introducing heating gas, and the other one is connected with the heating gas inlet and used for introducing the heating gas in the drying inner cylinder into the drying outer cylinder. The drying equipment adopts the mode of directly drying in the drum firstly and indirectly drying outside the drum, improves the drying efficiency, improves the drying effect and improves the heat utilization rate.
Description
Technical Field
The invention relates to the technical field of chemical equipment, in particular to internal-external heating type drying equipment. The invention also relates to a cracking system comprising the internal-external heating type drying equipment.
Background
The cracking system is common production equipment in the chemical field and is used for heating and cracking materials to obtain required substances. Cracking systems typically include a cracking unit and a drying unit, through which some of the material is dried before entering the cracking unit. The existing drying equipment has the advantages that after materials enter the drying equipment, hot air enters the inside of the drying equipment and is dried in a contact mode with the materials, the dried air is discharged, the heat utilization rate is low, and therefore the drying efficiency is improved, the drying effect is improved, and the heat utilization rate is improved.
Disclosure of Invention
In view of the above, the present invention is directed to an internal-external heating type drying apparatus, so as to improve the drying efficiency, improve the drying effect, and improve the heat utilization rate.
Another objective of the present invention is to provide a cracking system including the drying apparatus with internal heating and external heating, so as to improve the working efficiency, improve the cracking effect, and increase the heat utilization rate.
In order to achieve the purpose, the invention provides the following technical scheme:
an inside-out heating type drying apparatus, comprising:
the drying inner cylinder is provided with a feeding end and a discharging end at two ends respectively;
the feeding cover is arranged at the feeding end of the drying inner cylinder in a sealing manner and is provided with a feeding hole and a first gas through hole;
the discharging cover is hermetically covered at the discharging end of the drying inner cylinder and is provided with a discharging port and a second gas through hole;
the two ends of the drying outer barrel are hermetically sleeved on the periphery of the drying inner barrel, the drying outer barrel is provided with a heating gas inlet and a heating gas outlet, and the drying inner barrel rotates relative to the drying outer barrel, the feeding cover and the discharging cover which are fixedly arranged;
one of the first gas through hole and the second gas through hole is used for introducing heating gas, and the other one of the first gas through hole and the second gas through hole is connected with the heating gas inlet and used for introducing the heating gas in the drying inner cylinder into the drying outer cylinder.
Preferably, in the drying apparatus of the first internal-external heating type, the heated air inlet is disposed near a feeding end of the drying inner cylinder, and the heated air outlet is disposed near a discharging end of the drying inner cylinder.
Preferably, in the drying apparatus of the first internal-external heating type, the heated air inlet is disposed near a discharge end of the drying inner cylinder, and the heated air outlet is disposed near a feed end of the drying inner cylinder.
Preferably, in the drying apparatus of the first internal-external heating type, a spiral drying cavity and/or a spiral heating sheet is fixedly arranged in the drying inner cylinder, the inside of the spiral drying cavity is isolated from the inside of the drying inner cylinder, the spiral drying cavity is communicated with the drying outer cylinder and is used for introducing the heating gas of the drying outer cylinder into the spiral drying cavity, a first spiral feeding channel is defined by the side wall of the spiral drying cavity and the inner wall of the drying inner cylinder, and the cavity wall of the spiral drying cavity is used for transferring heat with the material in the drying inner cylinder; the spiral heating pieces and the spiral drying cavity are arranged adjacently along the axial direction, and a second spiral feeding channel formed by the spiral heating pieces is continuous with the first spiral feeding channel.
Preferably, in the drying apparatus of the first internal-external heating type, the spiral drying cavity is an annular spiral drying cavity, and a radial distance exists between an inner ring of the annular spiral drying cavity and an axis of the drying inner cylinder.
Preferably, in the drying apparatus of the internal-external heating type, the spiral heating plate is an annular spiral heating plate, and a radial distance exists between an inner ring of the annular spiral heating plate and an axis of the drying inner cylinder.
Preferably, in the drying apparatus of the internal-external heating type, the outer wall of the drying inner cylinder is provided with heating fins.
The invention also provides a cracking system, which comprises a drying device and a cracking furnace, wherein the discharge end of the drying device is communicated with the feeding device of the cracking furnace, and the drying device is the drying device with internal heating and external heating.
Preferably, in the cracking system, the cracking furnace includes a cracking cylinder and a combustion cylinder, two ends of the combustion cylinder are respectively sealed with the wall of the cracking cylinder in a rotating manner, the cracking cylinder rotates relative to the combustion cylinder fixedly arranged, heat generated by combustion in the combustion cylinder is used for heating materials in the cracking cylinder, and a tail gas outlet of the combustion cylinder is communicated with the first gas through hole or the second gas through hole of the drying device.
Preferably, in the above drying apparatus, a gas purifying apparatus is further disposed between the exhaust gas outlet and the first gas through hole or the second gas through hole.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a drying device with internal and external heating, which comprises a drying inner cylinder, a drying outer cylinder, a feeding cover and a discharging cover, wherein the drying inner cylinder is arranged in the drying outer cylinder; wherein, the two ends of the drying inner cylinder are respectively a feeding end and a discharging end; the feeding cover is hermetically covered at the feeding end of the drying inner cylinder and is provided with a feeding hole and a first gas through hole; the discharging cover is hermetically covered at the discharging end of the drying inner cylinder and is provided with a discharging port and a second gas through hole; the two ends of the drying outer cylinder are hermetically sleeved on the periphery of the drying inner cylinder, the drying outer cylinder is provided with a heating gas inlet and a heating gas outlet, and the drying inner cylinder rotates relative to the drying outer cylinder, the feeding cover and the discharging cover which are fixedly arranged; one of the first gas through hole and the second gas through hole is used for introducing heating gas, and the other one of the first gas through hole and the second gas through hole is connected with a heating gas inlet and used for introducing the heating gas in the drying inner barrel into the drying outer barrel.
When the drying device works, the feeding cover, the discharging cover and the drying outer barrel are all fixed, the drying inner barrel rotates relative to the feeding cover, the discharging cover and the drying outer barrel, materials enter the drying inner barrel through a feeding hole of the feeding cover, gradually move to a discharging end along with the rotation of the drying inner barrel and are discharged through a discharging hole of the discharging cover, in the process, heating gas enters the drying inner barrel through one of the first gas through hole and the second gas through hole, the heating gas is in direct contact with the materials in the drying inner barrel for heat transfer to dry the materials, the heating gas participating in drying is discharged from the other of the first gas through hole and the second gas through hole and enters the drying outer barrel through a heating gas inlet, the heating gas heats the barrel wall of the drying inner barrel in the drying outer barrel, and the barrel wall of the drying inner barrel transfers heat to the materials in the drying inner barrel, and finally, the heated gas in the drying outer cylinder is discharged out of the drying outer cylinder from the heated gas outlet after the heat transfer is finished.
Therefore, the internal-external heating type drying equipment not only transfers heat to materials through direct contact of the heating gas in the drying inner barrel, but also transfers heat indirectly by introducing the heating gas participating in drying in the drying inner barrel into the drying outer barrel, and adopts the mode of combining internal direct drying and external indirect drying, thereby improving the drying efficiency and the drying effect compared with the mode of only adopting direct drying in the barrel, and simultaneously, the heat of the heating gas is fully utilized, and the heat utilization rate is improved.
The cracking system provided by the invention adopts the drying equipment of the internal-external heating type, so that the materials before entering the cracking furnace are dried by the drying equipment, the drying efficiency is high, the overall working efficiency of the cracking system is improved, the materials are better dried, the cracking reaction in the cracking furnace is facilitated, the cracking effect is improved, and the heat utilization rate is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and those skilled in the art will be able to obtain other drawings based on the provided drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a cracking system according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a second cracking system provided in an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a third cracking system provided in an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a fourth cracking system provided in an embodiment of the present invention;
fig. 5 is a schematic structural diagram of an internal-external heating type drying apparatus according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of another internal-external heating drying device according to an embodiment of the present invention;
fig. 7 is a schematic side view of an inside-outside heating type drying apparatus according to an embodiment of the present invention.
The device comprises a feeding cover 1, a feeding hole 11, a first gas through hole 12, a drying inner cylinder 2, a drying outer cylinder 3, a heating gas inlet 31, a heating gas outlet 32, a spiral drying cavity 4, a vent hole 41, an airflow guide plate 5, a discharging cover 6, a discharging hole 61, a second gas through hole 62, a rotary supporting device 7, a supporting ring 71, a supporting wheel 72, a driving device 8, a gear ring 81, a transmission gear 82, a heating fin 9, a feeding device 101, a tail gas discharging hole 102, a combustion cylinder 103, a cracking cylinder 104, a cracking gas outlet 105, a gas supplementing hole 106, a spiral heating piece 20 and a gas purifying device 60.
Detailed Description
The core of the invention is to provide the drying equipment with the internal heating mode and the external heating mode, so that the drying efficiency is improved, the drying effect is improved, and the heat utilization rate is improved.
The invention also provides a cracking system comprising the internal-external heating type drying equipment, so that the working efficiency is improved, the cracking effect is improved, and the heat utilization rate is improved.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 4, an embodiment of the present invention provides an internal-external heating type drying apparatus, hereinafter referred to as a drying apparatus for short, including a drying inner cylinder 2, a drying outer cylinder 3, a feeding cover 1 and a discharging cover 6; wherein, the two ends of the drying inner cylinder 2 are respectively a feeding end and a discharging end; the feeding cover 1 is arranged at the feeding end of the drying inner cylinder 2 in a sealing manner, the feeding cover 1 is fixed and is communicated with the feeding end, and the feeding cover 1 is provided with a feeding hole 11 and a first gas through hole 12; the discharging cover 6 is hermetically covered at the discharging end of the drying inner cylinder 2, the discharging cover 6 is fixed and is communicated with the discharging end, and the discharging cover 6 is provided with a discharging hole 61 and a second gas through hole 62; the drying outer cylinder 3 is fixed, the drying outer cylinder 3 is of a square cylinder or circular cylinder structure and the like, two ends of the drying outer cylinder 3 are hermetically sleeved on the periphery of the drying inner cylinder 2, the drying outer cylinder 3 is provided with a heating gas inlet 31 and a heating gas outlet 32, and the drying inner cylinder 2 rotates relative to the drying outer cylinder 3, the feeding cover 1 and the discharging cover 6 which are fixedly arranged; one of the first gas through hole 12 and the second gas through hole 62 is used for introducing heating gas, and the other of the first gas through hole 12 and the second gas through hole 62 is connected with the heating gas inlet 31 and is used for introducing the heating gas in the drying inner cylinder 2 into the drying outer cylinder 3.
When the drying equipment works, the feeding cover 1, the discharging cover 6 and the drying outer cylinder 3 are all fixed, the drying inner cylinder 2 rotates relative to the feeding cover 1, the discharging cover 6 and the drying outer cylinder 3, materials enter the drying inner cylinder 2 through the feeding hole 11 of the feeding cover 1, the materials gradually move to the discharging end along with the rotation of the drying inner cylinder 2 and are discharged through the discharging hole 61 of the discharging cover 6, in the process, heating gas enters the drying inner cylinder 2 through one of the first gas through hole 12 and the second gas through hole 62, the heating gas is in direct contact with the materials in the drying inner cylinder 2 to transfer heat, the materials are dried, the heating gas participating in drying is discharged from the other of the first gas through hole 12 and the second gas through hole 62 and enters the drying outer cylinder 3 through the heating gas inlet 31, and the heating gas heats the cylinder wall of the drying inner cylinder 2 in the drying outer cylinder 3, the wall of the drying inner cylinder 2 transfers the heat to the material in the drying inner cylinder 2 to realize indirect heat transfer, and finally, the heating gas in the drying outer cylinder 3 is discharged out of the drying outer cylinder 3 from the heating gas outlet 32 after the heat transfer is finished.
It can be seen that, this drying equipment not only passes through the heating gas in the stoving inner tube 2 earlier to the material direct contact heat transfer, still will participate in the heating gas of stoving in the stoving inner tube 2 and introduce the stoving urceolus 3 in and carry out indirect heat transfer once more, adopts inside direct drying and outside indirect drying mode together, compares in only adopting the directly drying in the section of thick bamboo, has improved drying efficiency, has improved the stoving effect, simultaneously, make full use of heating gas's heat, improved the heat utilization ratio. The direct contact drying in the cylinder is firstly carried out, and then the indirect drying outside the cylinder is particularly suitable for solid materials with low ignition point and high humidity. The direct contact drying in the cylinder can quickly reduce the moisture in the materials.
In the present embodiment, the heated air inlet 31 is disposed near the feeding end of the drying inner cylinder 2, and the heated air outlet 32 is disposed near the discharging end of the drying inner cylinder 2, that is, the heated air inlet 31 and the heated air outlet 32 on the drying outer cylinder 3 are sequentially arranged along the material conveying direction.
Or the heated air inlet 31 is arranged close to the discharge end of the drying inner cylinder 2, and the heated air outlet 32 is arranged close to the feed end of the drying inner cylinder 2, that is, the heated air inlet 31 and the heated air outlet 32 on the drying outer cylinder 3 are arranged in sequence along the reverse direction of the material conveying direction.
Specifically, the flow path of the heating gas in the drying apparatus has four ways:
as shown in fig. 1, the heated air firstly enters the drying inner cylinder 2 through the second air through hole 62 on the discharging cover 6, is discharged from the first air through hole 12 on the feeding cover 1, then enters the drying outer cylinder 3 through the heated air inlet 31 close to the feeding end of the drying inner cylinder 2, and is discharged from the heated air outlet 32 close to the discharging end of the drying inner cylinder 2. In this way, the flow direction of the heating gas in the drying inner cylinder 2 is opposite to the conveying direction of the materials, and the flow direction of the heating gas in the drying outer cylinder 3 is the same as the conveying direction of the materials.
As shown in fig. 2, the heated air firstly enters the drying inner cylinder 2 through the second air through hole 62 on the discharging cover 6, is discharged from the first air through hole 12 on the feeding cover 1, then enters the drying outer cylinder 3 through the heated air inlet 31 near the discharging end of the drying inner cylinder 2, and is discharged from the heated air outlet 32 near the feeding end of the drying inner cylinder 2. In this way, the flow direction of the heating gas in the drying inner cylinder 2 is opposite to the conveying direction of the materials, and the flow direction of the heating gas in the drying outer cylinder 3 is also opposite to the conveying direction of the materials.
As shown in fig. 3, the heated air firstly enters the drying inner cylinder 2 through the first air through hole 12 on the feeding cover 1, is discharged from the second air through hole 62 on the discharging cover 6, then enters the drying outer cylinder 3 through the heated air inlet 31 near the feeding end of the drying inner cylinder 2, and is discharged from the heated air outlet 32 near the discharging end of the drying inner cylinder 2. In this way, the flowing direction of the heating gas in the drying inner cylinder 2 is the same as the conveying direction of the materials, and the flowing direction of the heating gas in the drying outer cylinder 3 is also the same as the conveying direction of the materials.
As shown in fig. 4, the heated air firstly enters the drying inner cylinder 2 through the first air through hole 12 on the feeding cover 1, and is discharged from the second air through hole 62 on the discharging cover 6, and then enters the drying outer cylinder 3 through the heated air inlet 31 near the discharging end of the drying inner cylinder 2, and is discharged from the heated air outlet 32 near the feeding end of the drying inner cylinder 2. In this way, the flow direction of the heating gas in the drying inner cylinder 2 is the same as the conveying direction of the materials, and the flow direction of the heating gas in the drying outer cylinder 3 is opposite to the conveying direction of the materials.
Preferably, the mode that the flowing directions of the heating gas in the drying inner cylinder 2 and the drying outer cylinder 3 are opposite to the material conveying direction is adopted, namely, the mode shown in fig. 2 is adopted, the heat exchange temperature difference between the material and the heating gas can be increased, the drying is realized more quickly, and the drying efficiency and the heat efficiency are improved.
As shown in fig. 5 and fig. 6, in the present embodiment, a spiral drying cavity 4 and/or a spiral heating plate 20 are further fixedly disposed in the drying inner cylinder 2, wherein the spiral drying cavity 4 is spirally disposed in the drying inner cylinder 2 along an axial direction of the drying inner cylinder 2, a spiral airflow channel is formed inside the spiral drying cavity 4, the inside of the spiral drying cavity 4 is isolated from the inside of the drying inner cylinder 2, the spiral drying cavity 4 is communicated with the drying outer cylinder 3 and is used for introducing the heating gas of the drying outer cylinder 3 into the spiral drying cavity 4, a first spiral feeding channel is defined by a side wall of the spiral drying cavity 4 and an inner wall of the drying inner cylinder 2, and a cavity wall of the spiral drying cavity 4 is used for heat transfer with the material in the drying inner cylinder 2; spiral heating plate 20 is the heliciform along the axial of drying inner tube 2 and sets up in drying inner tube 2, and spiral heating plate 20 is fixed with the inner wall of drying inner tube 2, and spiral heating plate 20 arranges with spiral drying cavity 4 along the axial is adjacent, and the second spiral pay-off passageway that spiral heating plate 20 formed is continuous with first spiral pay-off passageway.
When the drying equipment works, a material to be dried enters the drying inner barrel 2 from the feeding end, the drying inner barrel 2, the spiral drying cavity 4 and the spiral heating piece 20 rotate together, and the material moves towards the discharging end automatically through a first spiral feeding channel formed by the spiral drying cavity 4 and a second spiral feeding channel formed by the spiral heating piece 4 along with the rotation of the drying inner barrel 2. For the drying inner barrel 2 provided with the spiral drying cavity 4, in the process of moving materials in the drying inner barrel 2, heating gas in the drying outer barrel 3 is introduced into the spiral drying cavity 4 in the drying inner barrel 2, a spiral gas channel is formed inside the spiral drying cavity 4, the spiral drying cavity 4 is isolated from the inside of the drying inner barrel 2, the cavity wall of the spiral drying cavity 4 is used for conducting heat with the materials in the drying inner barrel 2, the spiral drying cavity 4 not only plays a role in conveying the materials, but also fully utilizes the space in the drying inner barrel 2, radial and axial heat convection, heat conduction and heat radiation channels are provided between the drying inner barrel 2 and the drying outer barrel 3, and the heat conduction area is greatly increased. For the drying inner cylinder 2 provided with the spiral heating sheet 20, the heat of the heating gas in the drying outer cylinder 3 is transferred to the inner wall of the drying inner cylinder 2 and then transferred to the spiral heating sheet 20, the spiral heating sheet 20 is in contact with the material for heat transfer, and the spiral heating sheet 20 also improves the heat transfer area in the drying inner cylinder 2. The materials are heated and dried in the drying inner cylinder 2, and gas generated by drying the materials can be discharged from the feeding end or the discharging end.
The spiral drying cavity 4 and/or the spiral heating plate 20 are/is arranged, so that materials can be conveyed in the drying inner barrel 2 conveniently, the drying equipment does not need to be arranged obliquely, and the feeding end is higher than the discharging end. Certainly, the drying device may not be provided with the spiral drying cavity 4 and/or the spiral heating plate 20, and in order to smoothly convey the material, the drying device is obliquely arranged, and the material is conveyed to the discharge end from the feed end along with the rotation of the drying inner cylinder 2 by using the self weight of the material.
As shown in fig. 5, only the spiral drying cavity 4 may be disposed in the drying inner cylinder 2; or, only the spiral heating sheet 20 can be arranged in the drying inner cylinder 2; alternatively, as shown in fig. 6, the spiral drying cavity 4 and the spiral heating plate 20 may be disposed in the drying inner cylinder 2 at the same time. In the present embodiment, in the drying inner drum 2, the arrangement position and arrangement ratio of the spiral drying cavity 4 and the spiral heating plate 20 are set according to the drying requirement, and are not particularly limited. The spiral drying cavity 4 is arranged at the front section part in the drying inner barrel 2, and the spiral heating plate 20 is arranged at the rear section part in the drying inner barrel 2. The spiral drying cavity 4 is arranged at the rear section part of the drying inner barrel 2, and the spiral heating plate 20 is arranged at the front section part of the drying inner barrel 2. The spiral heating plate 20 is arranged at the middle section part of the drying inner cylinder 2, and the spiral heating plate 20 is arranged at the front section part and the rear section part of the drying inner cylinder 2. Of course, other arrangements are possible and are not limited to the illustrated form of the present embodiment. In this embodiment, two side walls of the spiral drying cavity 4 are two single-piece spirals, respectively, and the spiral heating plate 20 is one single-piece spiral, and preferably, one of the side walls of the spiral drying cavity 4 and the spiral heating plate 20 share one single-piece spiral, so that the structure is simpler, and the processing and manufacturing are convenient. Of course, different single-piece spirals can be used for the two side walls of the spiral drying chamber 4 and the spiral heating plate 20.
In this embodiment, the spiral drying cavity 4 is located and fixed on the inner cylinder wall of the drying inner cylinder 2, the cavity wall on one side of the spiral drying cavity 4 for location may be an independent cavity wall or may be common to the inner wall of the drying inner cylinder 2, one or more vent holes 41 are formed in the cylinder wall where the spiral drying cavity 4 and the drying inner cylinder 2 are attached to or common to each other, the vent holes 41 are arranged along the spiral direction, and the spiral drying cavity 4 and the drying outer cylinder 2 are in gas communication through the vent holes 41. If a vent hole 41 is arranged, the heated air with certain pressure in the drying outer cylinder 3 enters the spiral drying cavity 4 through the vent hole 41, in order to make the heated air fill the spiral drying cavity 4, a vent hole 41 is arranged at one end of the spiral drying cavity 4, the heated air gradually fills the whole cavity from one end of the spiral drying cavity 4, the vent hole 41 is preferably arranged at one end of the spiral drying cavity 4 close to the discharge end, so that the flow direction of the heated air is opposite to the material moving direction, and the heat transfer efficiency is further improved. If a plurality of vent holes 41 are provided, the plurality of vent holes 41 are arranged along the spiral direction of the spiral drying cavity 4, and preferably, the plurality of vent holes 41 are uniformly distributed to further improve the uniformity of gas heat transfer.
In this embodiment, the vent 41 enables the heated air in the drying outer cylinder 3 to enter the spiral drying cavity 4, and the solid or liquid material in the drying outer cylinder 3 is prevented or reduced as much as possible from entering the spiral drying cavity 4 through the vent 41, because the drying outer cylinder 3 is fixedly arranged, the solid or liquid material usually stays at the bottom of the drying outer cylinder 3 and is not easy to enter the vent 41, and the heated air can diffuse and convect to enter the spiral drying cavity 4 through the vent 41, thereby further ensuring that the heated air better flows through the spiral drying cavity 4 for heat transfer.
Of course, the shape, size and number of the vent holes 41 are not limited in this embodiment, the vent holes 41 may be any shape, such as circular, rectangular, oval, quincunx, etc., as long as it is favorable for the gas to pass through, the size of the vent holes 41 is determined according to the heating requirement, if the heating requirement is large, the larger vent holes 41 may be provided to ensure sufficient circulation of the heated gas, and conversely, the smaller vent holes 41 may be provided. The number of the vent holes 41 is also set according to the heating requirement, the more the number of the vent holes 41 is, the smoother the circulation of the heating gas in the spiral drying cavity 4 is, the faster the heating speed is, otherwise, the slower the heating speed is, but at the same time, the solid and liquid materials in the drying outer cylinder 3 are prevented from entering the spiral drying cavity 4 as much as possible.
Further, in this embodiment, the spiral drying cavity 4 is an annular spiral drying cavity, and a radial distance exists between an inner ring of the annular spiral drying cavity and the axis of the drying inner cylinder 2. So set up, the central part of annular spiral stoving cavity forms the axial hollow region who link up stoving inner tube 2, and the gas that the stoving produced in the stoving inner tube 2 can circulate through hollow region more smoothly, is favorable to the discharge of the gas that the stoving produced.
Of course, the spiral drying cavity 4 may not have a hollow area, so that the gas generated by drying in the drying inner cylinder 2 can also be spirally conveyed in the spiral feeding channel, but the path for conveying the gas is longer.
Preferably, in this embodiment, the difference between the outer ring diameter and the inner ring diameter of the annular spiral drying cavity is smaller than the radius of the drying inner cylinder, and the difference between the outer ring diameter and the inner ring diameter of the annular spiral drying cavity is determined according to the drying requirement and the gas emission requirement in the drying inner cylinder 2.
As an optimization, in this embodiment, the width between the two side walls of the spiral drying cavity 4 is greater than 1cm, and the size of the width determines the size of the gas channel inside the spiral drying cavity 4, thereby determining the size of the heating amount and the size of the heat dissipation area, and ensuring the convection and turbulence of the hot gas flow.
In this embodiment, the screw pitch of the spiral drying cavity 4 is equal screw pitch or variable screw pitch, and the screw pitch is greater than 1 cm. And determining the screw pitch form and the size of the screw pitch according to the drying temperature requirements of different axial sections in the drying inner cylinder 2.
Similarly, in the present embodiment, the spiral heating plate 20 is an annular spiral heating plate, and a radial distance exists between an inner ring of the annular spiral heating plate and the axis of the drying inner cylinder 2. So set up, the central part of annular spiral heating plate forms the axial hollow region who link up stoving inner tube 2, and the gas that the stoving produced in the stoving inner tube 2 can circulate through hollow region more smoothly, is favorable to the discharge of the gas that the stoving produced.
Of course, the spiral heating plate 20 may not have a hollow area, and the gas generated by drying in the drying inner cylinder 2 can also be conveyed in the first spiral conveying channel and the second spiral conveying channel by spiral conveying, but the path of the gas conveying is longer.
The screw pitch of the spiral heating sheet 20 and the screw pitch of the single-side cylinder wall of the spiral drying cavity 4 can be the same or different, and the difference between the outer ring diameter and the inner ring diameter of the annular spiral heating sheet can be equal to or different from the difference between the outer ring diameter and the inner ring diameter of the annular spiral drying cavity according to actual needs.
In this embodiment, the spiral drying cavity 4 is a continuous spiral cavity or a plurality of discontinuous spiral cavities. When the spiral drying cavity 4 is a continuous spiral cavity, the axial length of the continuous spiral cavity is the maximum length, and the internal airflow channels of the continuous spiral cavity are continuously communicated. When the spiral drying cavity 4 is a plurality of discontinuous spiral cavities, the discontinuous spiral cavities are sequentially arranged along the axial direction of the drying inner cylinder 2, each discontinuous spiral cavity is independently communicated with the drying outer cylinder 3, and the cavity walls of the discontinuous spiral cavities are combined to form a continuous first spiral feeding channel.
Similarly, the spiral heating plate 20 is a continuous spiral heating plate or a plurality of discontinuous spiral heating plates. When the spiral heating chip 20 is a continuous spiral heating chip, the axial length of the continuous spiral heating chip is the maximum length. When the spiral heating plate 20 is a plurality of intermittent spiral heating plates 20, the plurality of intermittent spiral heating plates 20 are sequentially arranged along the axial direction of the drying inner cylinder 2. Of course, the plurality of intermittent spiral heating sheets and the plurality of intermittent spiral drying cavities can be arranged and combined at will. As long as the first spiral feeding channel and the second spiral feeding channel are continuous.
As shown in fig. 1 to 6, in the present embodiment, the inner wall of the drying tub 3 is provided with an air flow guide plate 5, and the air flow guide plate 5 extends spirally in the direction from the heating air inlet 31 to the heating air outlet 32. The heated air introduced into the drying outer cylinder 3 is guided to the whole inner space through the airflow guide plate 5, the path and the retention time of the heated air in the drying outer cylinder 3 are prolonged, the heating uniformity is improved, and the heat of the heated air is fully utilized.
As shown in fig. 5, in the present embodiment, the outer wall of the drying inner drum 2 is provided with heating fins 9, and the heating fins 9 are preferably uniformly arranged along the circumference of the outer wall of the drying inner drum 2 and are uniformly arranged along the axial direction. The heating fins 9 are arranged to increase the heat transfer area between the heating gas in the drying outer barrel 3 and the outer wall of the drying inner barrel 2, so that the heating of the heating gas on the barrel wall of the drying inner barrel 2 and the spiral heating sheets 20 is accelerated, and the drying speed of the barrel wall of the drying inner barrel 2 on the material is further improved.
In the embodiment, the drying inner cylinder 2 is driven to rotate by the driving device 8, the driving device 8 comprises a gear ring 81, a transmission gear 82 and a power component, the gear ring 81 is arranged on the outer cylinder wall of the drying inner cylinder 2, the gear ring 81 and the drying inner cylinder 2 rotate together, and the transmission gear 82 is meshed with the gear ring 81; the power component is in transmission connection with the transmission gear 82 and drives the transmission gear 82 to rotate, so as to drive the drying inner barrel 2 to rotate. The power component is preferably an electric motor or comprises an electric motor and a speed reducer. Of course, the driving device 8 may have other configurations, and is not limited to the illustrated embodiment.
In this embodiment, the drying inner cylinder 2 is supported by the rotation supporting device 7, the rotation supporting device 7 includes a supporting ring 71 and supporting wheels 72, the supporting ring 71 is fixed on the outer cylinder wall of the drying inner cylinder 2, preferably, is arranged on the periphery of two ends of the drying inner cylinder 2, and the supporting ring 71 is rotatably supported by the supporting wheels 72 below.
As shown in fig. 1 to fig. 6, based on the drying apparatus with internal heating and external heating described in any of the above embodiments, an embodiment of the present invention further provides a cracking system, which includes a drying apparatus and a cracking furnace, a discharging end of the drying apparatus is communicated with a feeding device 101 of the cracking furnace, and the drying apparatus is the drying apparatus with internal heating and external heating described in any of the above embodiments.
During operation, the material is dried through drying equipment earlier, and later, the material after the stoving is discharged from discharge gate 61 back, gets into the feed arrangement 101 of pyrolysis furnace, sends into the material through feed arrangement 101 and participates in the pyrolysis reaction in the pyrolysis furnace, and the solid material after the reaction passes through discharging device and discharges out the pyrolysis furnace, and the cracked gas that the schizolysis produced passes through cracked gas discharge port 105 and discharges. Owing to adopt the drying equipment in this application, the material before getting into the pyrolysis furnace is dried through drying equipment, and drying efficiency is high, has improved the holistic work efficiency of pyrolysis system, and the material obtains better stoving, is favorable to the cracking reaction in the pyrolysis furnace, has improved the schizolysis effect, has improved the heat utilization ratio.
Further, in this embodiment, the cracking furnace is optimized, the cracking furnace includes a cracking cylinder 104 and a combustion cylinder 103, two ends of the combustion cylinder 103 are respectively sealed with the wall of the cracking cylinder 104 in a rotating manner, the cracking cylinder 104 rotates relative to the combustion cylinder 103 fixedly disposed, heat generated by combustion in the combustion cylinder 103 is used for heating materials in the cracking cylinder 104, a tail gas outlet 102 of the combustion cylinder 103 is communicated with the first gas through hole 12 or the second gas through hole 62 of the drying device, and similarly, there are four flowing manners of the heating gas in the drying device, as shown in fig. 1 to 4, which are not described herein again. An air supply opening 105, an ignition opening and a fuel supply opening are formed in the wall of the combustion cylinder 103 and are used for combusting fuel in the combustion cylinder 103. Because the waste gas generated by combustion in the combustion cylinder 103 is high-temperature waste gas, the high-temperature waste gas is firstly introduced into the drying inner cylinder 2 and then enters the drying outer cylinder 3 to be used as heating gas, thereby fully utilizing the waste heat of the cracking system, improving the heat utilization rate and saving the energy consumption.
Of course, the heated air used by the drying apparatus may be provided by other means.
Further, in this embodiment, a gas purifying device 60 is further disposed between the exhaust outlet 102 and the first gas through hole 12 or the second gas through hole 62, so as to purify the high-temperature exhaust gas in the combustion cylinder 103 and then introduce the high-temperature exhaust gas into the drying device, thereby reducing the deposition of smoke in the drying device. The gas cleaning device 60 may employ a cyclone cleaning device or the like.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The utility model provides an interior external heating formula drying equipment which characterized in that includes:
the drying device comprises a drying inner cylinder (2), wherein a feeding end and a discharging end are respectively arranged at two ends of the drying inner cylinder (2);
the feeding cover (1) is hermetically covered at the feeding end of the drying inner cylinder (2), and the feeding cover (1) is provided with a feeding hole (11) and a first gas through hole (12);
the discharging cover (6) is hermetically covered at the discharging end of the drying inner cylinder (2), and the discharging cover (6) is provided with a discharging hole (61) and a second gas through hole (62);
the two ends of the drying outer cylinder (3) are hermetically sleeved on the periphery of the drying inner cylinder (2), the drying outer cylinder (3) is provided with a heating gas inlet (31) and a heating gas outlet (32), and the drying inner cylinder (2) is relatively fixedly provided with the drying outer cylinder (3), the feeding cover (1) and the discharging cover (6) to rotate;
one of the first gas through hole (12) and the second gas through hole (62) is used for introducing heating gas, and the other one is connected with the heating gas inlet (31) and used for introducing the heating gas in the drying inner barrel (2) into the drying outer barrel (3).
2. An internal-external heating drying apparatus according to claim 1, wherein the heated air inlet (31) is disposed near a feeding end of the drying inner drum (2), and the heated air outlet (32) is disposed near a discharging end of the drying inner drum (2).
3. An internal-external heating drying apparatus according to claim 1, wherein the heated air inlet (31) is disposed near a discharge end of the drying inner drum (2), and the heated air outlet (32) is disposed near a feed end of the drying inner drum (2).
4. A drying apparatus of internal-external heating type according to any one of claims 1-3, wherein a spiral drying cavity (4) and/or a spiral heating plate (20) is fixedly disposed inside the drying inner drum (2), the inside of the spiral drying cavity (4) is isolated from the inside of the drying inner drum (2), the spiral drying cavity (4) is communicated with the drying outer drum (3) for introducing the heating gas of the drying outer drum (3) into the spiral drying cavity (4), the side wall of the spiral drying cavity (4) and the inner wall of the drying inner drum (2) enclose a first spiral feeding channel, and the cavity wall of the spiral drying cavity (4) is used for heat transfer with the material inside the drying inner drum (2); the spiral heating pieces (20) and the spiral drying cavity (4) are arranged adjacently along the axial direction, and a second spiral feeding channel formed by the spiral heating pieces (20) is continuous with the first spiral feeding channel.
5. Internal-external heating drying equipment according to claim 4, characterized in that said spiral drying chamber (4) is an annular spiral drying chamber, the inner ring of which is radially spaced from the axis of said drying inner drum (2).
6. Internal-external heating drying equipment according to claim 4, wherein the spiral heating plate (20) is an annular spiral heating plate, and a radial distance exists between the inner ring of the annular spiral heating plate and the axis of the drying inner drum (2).
7. An internal-external heating type drying apparatus according to claim 1, wherein the outer wall of the drying inner drum (2) is provided with heating fins (9).
8. A cracking system comprising a drying apparatus and a cracking furnace, the discharge end of the drying apparatus being in communication with a feeding device (101) of the cracking furnace, characterized in that the drying apparatus is a drying apparatus of the internal-external heating type according to any one of claims 1 to 7.
9. The cracking system of claim 8, wherein the cracking furnace comprises a cracking cylinder (104) and a combustion cylinder (103), two ends of the combustion cylinder (103) are respectively and rotationally sealed with the wall of the cracking cylinder (104), the cracking cylinder (104) rotates relative to the combustion cylinder (103) which is fixedly arranged, heat generated by combustion in the combustion cylinder (103) is used for heating materials in the cracking cylinder (104), and a tail gas outlet (102) of the combustion cylinder (103) is communicated with the first gas through hole (12) or the second gas through hole (62) of the drying device.
10. The cracking system according to claim 9, wherein a gas cleaning device (60) is further communicated between the tail gas exhaust port (102) and the first gas through hole (12) or the second gas through hole (62).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011525215.7A CN114713138A (en) | 2020-12-22 | 2020-12-22 | Heating type drying equipment with internal heating and external heating and cracking system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011525215.7A CN114713138A (en) | 2020-12-22 | 2020-12-22 | Heating type drying equipment with internal heating and external heating and cracking system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115597332A (en) * | 2022-10-25 | 2023-01-13 | 中广核工程有限公司（Cn） | Drying device and drying method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115597332A (en) * | 2022-10-25 | 2023-01-13 | 中广核工程有限公司（Cn） | Drying device and drying method |
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Effective date of registration: 20220802 Address after: 265400 No.96, Chushan East Road, Zhaoyuan City, Yantai City, Shandong Province Applicant after: Zhaoyuan Huichao New Energy Technology Co.,Ltd. Address before: Room 46, 1001, 1002 and 1003, building 2, courtyard 15, Guanghua Road, Chaoyang District, Beijing 100026 Applicant before: Beijing Huichao Yunji Technology Co.,Ltd. |
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