CN215063239U - Two base series connection powder degree of depth drying systems - Google Patents
Two base series connection powder degree of depth drying systems Download PDFInfo
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- CN215063239U CN215063239U CN202120844725.4U CN202120844725U CN215063239U CN 215063239 U CN215063239 U CN 215063239U CN 202120844725 U CN202120844725 U CN 202120844725U CN 215063239 U CN215063239 U CN 215063239U
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Abstract
The utility model discloses a two base series connection powder degree of depth drying systems relates to powder degree of depth drying technical field, include: a drying part, a fluidizing part and an off-gas double circulation part; the drying part is provided with a heating source input port, a humidity material input port, a primary drying material output port and a first tail gas output port; the fluidization part comprises a primary dry material input port, a circulating gas input port, a final dry material output port and a second tail gas output port; the tail gas double-circulation component comprises a primary circulation structure and a secondary circulation structure; the primary drying material output port is communicated with the primary drying material input port through a connecting part; the first tail gas output port is communicated with the input port of the primary circulation structure, the second tail gas output port is communicated with the input port of the secondary circulation structure, and the output port of the primary circulation structure and the output port of the secondary circulation structure are both communicated with the circulating gas input port. The utility model discloses can continuous operation and be fit for the big polypropylene powder of moisture content.
Description
Technical Field
The utility model relates to a powder deep drying technical field especially relates to a two base series connection powder deep drying systems.
Background
The polypropylene powder is a semi-crystalline thermoplastic plastic with the advantages of impact resistance, good mechanical toughness, organic resistance, acid and alkali corrosion resistance and the like. The current polypropylene powder drying device still has some problems, such as: the drying adjustability is poor when the humidity is high, the drying retention time is short, the drying is not thorough, and the like.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a two base series connection powder degree of depth drying systems, this system can continuous operation and be fit for the big polypropylene powder of moisture content.
In order to achieve the above object, the utility model provides a following scheme:
a two-base in-line powder deep drying system comprising: a drying part, a fluidizing part and an off-gas double circulation part;
the drying part is provided with a heating source input port, a humidity material input port, a primary drying material output port and a first tail gas output port; the fluidization component comprises a primary dry material input port, a circulating gas input port, a final dry material output port and a second tail gas output port; the tail gas double-circulation component comprises a primary circulation structure and a secondary circulation structure;
the primary drying material output port is communicated with the primary drying material input port through a connecting part; the first tail gas output port is communicated with the input port of the primary circulation structure, the second tail gas output port is communicated with the input port of the secondary circulation structure, and the output port of the primary circulation structure and the output port of the secondary circulation structure are both communicated with the circulating gas input port.
Optionally, a stirring main shaft, a disc and a jacket are arranged in the drying part;
the jacket is communicated with the heating heat source input port so as to introduce low-pressure steam;
and the humidity material falls into the drying part from the humidity material input port and performs intermittent heat exchange with the low-pressure steam introduced into the main shaft, the disc and the jacket to generate primary drying material.
Optionally, the connecting part comprises a buffer bin and a material metering tank which are connected in sequence; the primary dry material passes through the primary dry material delivery outlet gets into the buffer storehouse, passes through get into behind the buffer storehouse the material metering jar, pass through after the material metering jar through the primary dry material input port ration flow direction to fluidization part.
Optionally, the primary circulating structure comprises a primary cyclone dust collector and a draught fan; first tail gas passes through the drying part top sets up first tail gas delivery outlet gets into one-level cyclone, process behind one-level cyclone dust removal operation, dust in the first tail gas gets back to the buffer bin, first tail gas process after the dust removal the draught fan gets into the circulating gas input port, and then gets into the fluidization part.
Optionally, the washing machine further comprises a washing tower, a Roots blower B and a heater;
and the dedusted first tail gas also enters the washing tower through the induced draft fan, enters the Roots blower B after being cooled and washed by the washing tower, enters the heater after being subjected to pressurization treatment by the Roots blower B, enters the circulating gas inlet after being heated by the heater, and further enters the fluidizing component.
Optionally, the secondary circulation structure comprises a secondary cyclone dust collector, a powder tank, a filter tank and a roots blower A;
second tail gas enters the secondary cyclone dust collector through the second tail gas outlet, after the dust removal operation of the secondary cyclone dust collector, powder of the second tail gas enters the powder tank, a part of the second tail gas after dust removal enters the Roots blower A after passing through the filter tank, enters the heater after being subjected to pressurization treatment by the Roots blower A, then enters the circulating gas inlet after being heated by the heater, and further enters the fluidizing component; and the other part of the second tail gas after dust removal enters the washing tower.
Optionally, the system also comprises a circulating water pump, a primary cooler and a secondary cooler;
circulating liquid at the bottom of the washing tower enters the primary cooler after being pressurized by the circulating water pump and returns to the washing tower after passing through the primary cooler and the secondary cooler in sequence for heat exchange.
Optionally, the device further comprises a central blanking pipe; and the final dried material enters the central blanking pipe through the final dried material output port to obtain the final dried material.
Optionally, the drying component is a single-shaft disc dryer or a double-shaft disc dryer.
Optionally, the fluidizing component is a single-cylinder fluidized bed or a double-cylinder fluidized bed.
According to the utility model provides a concrete embodiment, the utility model discloses a following technological effect:
the utility model provides a two base series connection powder degree of depth drying systems adopts two base series connection drying, and drying process flow is long, and dry dwell time is long, so be fit for material degree of depth drying.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.
FIG. 1 is a block diagram of a double-base series deep powder drying system according to the present invention;
fig. 2 is a schematic structural diagram of the deep drying system for polypropylene powder with double base series connection.
Description of the symbols: 1-a dryer; 2-first stage cyclone dust collector; 3, a draught fan; 4-cache storage; 5, material metering tank; 6, a fluidized bed; 7-secondary cyclone dust collector; 8, a powder tank; 9-a filtering tank; 10-a washing tower; 11-circulating water pump; 12-roots blower a; 13-roots blower B; 14-primary cooler; 15-a secondary cooler; 16-heater.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model aims at providing a two base series connection powder degree of depth drying systems, this system can continuous operation and be fit for the big polypropylene powder of moisture content.
In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.
The embodiment of the utility model provides a two base series connection powder degree of depth drying systems, this system can the continuous operation, and the polypropylene powder that is fit for moisture content is big carries out degree of depth drying, and is dry more thoroughly. In addition, the system has the advantages of simple and convenient operation, high automation degree, small occupied area, long retention time and the like.
As shown in fig. 1, the two-base series deep powder drying system provided by the embodiment of the present invention mainly includes a drying component, a fluidizing component and a tail gas dual-circulation component.
The drying part is provided with a heating source input port, a humidity material input port, a primary drying material output port and a first tail gas output port; the fluidization part comprises a primary dry material input port, a circulating gas input port, a final dry material output port and a second tail gas output port; the tail gas double-circulation component comprises a primary circulation structure and a secondary circulation structure.
The primary drying material output port is communicated with the primary drying material input port through a connecting part; the first tail gas output port is communicated with the input port of the primary circulation structure, the second tail gas output port is communicated with the input port of the secondary circulation structure, and the output port of the primary circulation structure and the output port of the secondary circulation structure are both communicated with the circulating gas input port.
As a preferred embodiment, the drying unit of the present invention is a single-shaft disc dryer or a double-shaft disc dryer. A stirring main shaft, a disc and a jacket are arranged in the drying part; and a jacket in the drying part is communicated with a heating heat source input port so as to introduce low-pressure steam of 0.2-0.3 MPa. The humidity material falls into the drying part from the humidity material input port and performs intermittent heat exchange with low-pressure steam introduced into the main shaft, the disc and the jacket to generate primary drying material. The disk of the drying part of the embodiment of the utility model adds mechanical stirring function to prevent agglomeration; wherein the disk is disposed on the spindle.
As a preferred embodiment, the connecting component of the present invention comprises a buffer bin and a material metering tank which are connected in sequence; the primary dry material enters the buffer bin through the primary dry material output port, enters the material metering tank through the buffer bin, and then flows to the fluidization component through the primary dry material input port in a quantitative mode after passing through the material metering tank.
In a preferred embodiment, the fluidizing component of the present invention is a single-tube fluidized bed or a double-tube fluidized bed. In the actual process, the corresponding fluidized bed is selected according to the requirement.
And after being dried by the fluidizing part, the final dried material enters the central blanking pipe through the final dried material output port to obtain the final dried material.
As a preferred embodiment, the primary circulation structure of the present invention comprises a primary cyclone dust collector and an induced draft fan; first tail gas (the gas that contains N2) gets into one-level cyclone through the first tail gas delivery outlet that dry part top set up, through one-level cyclone dust removal operation back, the dust in the first tail gas gets back to the buffer bin, and the second tail gas after the dust removal gets into the circulating gas input port through the draught fan and in order to get into the fluidization part, has realized gaseous recycling.
On the basis, further, two basic series connection powder degree of depth drying system still include scrubbing tower, roots's fan B and heater. The washing tower is a rotational flow plate tower, a perforated plate tower or a packed tower.
First tail gas after the dust removal still gets into the scrubbing tower through the draught fan, after the scrubbing tower cooling washing, gets into roots's fan B, then carries out the pressure boost through roots's fan B and handles in order to realize cyclic utilization. And the first tail gas pressurized by the Roots blower B enters the circulating gas inlet after being heated by the heater and then enters the fluidizing part.
On the basis, further, the secondary circulation structure of the utility model comprises a secondary cyclone dust collector, a powder tank, a filter tank and a Roots blower A; the second tail gas (the fluidized tail gas containing N2) enters a secondary cyclone dust collector through a second tail gas outlet, the separated powder (namely the powder in the second tail gas) enters a powder tank after the dust removal operation of the secondary cyclone dust collector, a part of the second tail gas after dust removal enters a Roots blower A through a filter tank, enters a heater after the pressurization treatment of the Roots blower A, then enters a circulating gas inlet after the heating of the heater, and further enters a fluidizing part; and the other part of second tail gas after dust removal enters a washing tower, enters a Roots blower B after being cooled and washed by the washing tower, and is subjected to pressurization treatment by the Roots blower B to realize cyclic utilization. And the second tail gas pressurized by the Roots blower B enters the circulating gas inlet after being heated by the heater and then enters the fluidizing part.
On the basis, further, two base series connection powder degree of depth drying system still include circulating water pump, one-level cooler and second grade cooler. Circulating liquid at the bottom of the washing tower enters the primary cooler after being pressurized by the circulating water pump, and returns to the washing tower after heat exchange of the primary cooler and the secondary cooler in sequence.
The primary cooler is a plate heat exchanger or a tubular heat exchanger; the secondary cooler is in the form of a plate heat exchanger or a tube heat exchanger. The heater is in a fin heat exchanger form, and a heating heat source is low-pressure steam of 0.2-0.3 MPa.
The embodiment of the utility model provides a two base series connection powder degree of depth drying system who adopts because two drying equipment of two base series connections, so dry dwell time is long, and then is fit for the material that moisture content is big to carry out degree of depth drying. The embodiment of the utility model provides a moisture content of import department of fluidized bed low and adjustable, have easy fluidization, no blind spot, fluidization advantage such as effectual, and fluidized bed drying temperature is less than original fluidized bed drying process, dry quality is better. The tail gas double-circulation component has the advantages of energy conservation, consumption reduction and the like. Obviously the utility model discloses can extensively popularize and apply to material deep drying such as resin, various trade marks polypropylene, plastic powder, polyethylene, salt, have wide application prospect.
Example two
As shown in fig. 2, the embodiment of the present invention provides a two-base series polypropylene powder deep drying system, which mainly includes a dryer 1, a first-stage cyclone 2, a draught fan 3, a buffer storage bin 4, a material metering tank 5, a fluidized bed 6, a second-stage cyclone 7, a powder tank 8, a filter tank 9, a washing tower 10, a circulating water pump 11, a roots blower a12, a roots blower B13, a first-stage cooler 14, a second-stage cooler 15, and a heater 16.
The drier 1 is internally provided with a stirring main shaft, a disc and a jacket. And low-pressure steam of 0.2-0.3 MPa is introduced into a jacket in the dryer 1. Upstream materials (namely polypropylene powder with high moisture content) fall into the dryer 1 to perform intermittent heat exchange with low-pressure steam introduced into the main shaft, the disc and the jacket, and the dried materials are quantitatively fed into the fluidized bed 6 through the buffer bin 4 and the material metering tank 5 in sequence; after tail gas (namely gas containing N2) at the top of the dryer 1 is subjected to dust removal operation through the primary cyclone dust collector 2, dust returns to the buffer bin 4, and the tail gas subjected to dust removal enters the washing tower 10 through the induced draft fan 3.
The dried material first enters the first distribution plate of the fluid bed 6, then undergoes a rotational movement according to the direction of the openings and finally is blown into the central down pipe through the lateral holes to obtain the final dried material (i.e. the polypropylene powder after deep drying). The mixed hot air is used for fluidizing and conveying materials by a distribution plate of the fluidized bed 6, and the fluidized tail gas (namely the gas containing N2) is subjected to dust removal operation by a secondary cyclone dust collector 7. The powder separated by the secondary cyclone dust collector 7 enters the powder tank 8, after dust removal operation is carried out on a part of separated tail gas through the filter tank 9, pressurization treatment is carried out through the Roots blower A12 to realize recycling, the other part of separated tail gas enters the washing tower 10 to be cooled and washed, and then pressurization treatment is carried out through the Roots blower B13 to realize recycling. The tail gas after being pressurized by the Roots blower B13 is converged with the tail gas after being pressurized by the Roots blower A12 and is discharged in a small amount. The collected tail gas is heated by a heater 16, flows into the bottom of the fluidized bed 6 and fluidizes the materials through a distribution plate. After the circulating liquid at the bottom of the washing tower 10 is pressurized by the circulating water pump 11, most of the circulating liquid returns to the washing tower 10 for spraying gas after heat exchange by the primary cooler 14 and the secondary cooler 15, and a small part of the circulating liquid is discharged as wastewater.
The embodiment of the utility model provides a have following advantage:
1. the system adopts double-base series connection drying, has long drying process flow and long drying retention time, and is suitable for deep drying of materials.
2. The dryer is suitable for the change of the moisture content of the imported materials, the adjustability is high, the moisture content of the outlet of the dryer can be reduced to be below 1%, the dried materials enter the fluidized bed for drying, the upstream materials are stable, the agglomeration is avoided, the fluidization effect is better, and the moisture content after drying can be reduced to be below 10PPm
3. The moisture content of the inlet of the fluidized bed drying section is low, the fluidization effect is good, the drying temperature of the fluidized bed is lower than that of the original fluidized bed drying process, and the drying quality is better.
4. The temperature of the hot air is lower than the hot melting point of the product, and the product quality is good. After being dried by the dryer, the temperature of the hot air inlet of the fluidized bed drying is controlled to be 95-115 ℃, and the temperature is lower than that of the original fluidized bed drying process, so that the material is prevented from melting and deforming in the drying process.
5. The tail gas double-circulation component comprises tail gas self-circulation and tail gas condensation circulation, the tail gas circulation is fully utilized to realize self-inerting, energy is saved, consumption is reduced, and the exhaust emission is small.
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 principle and the implementation of the present invention are explained herein by using specific examples, and the above description of the embodiments is only used to help understand the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present specification should not be construed as a limitation of the present invention.
Claims (10)
1. A two-base series-connection deep powder drying system is characterized by comprising: a drying part, a fluidizing part and an off-gas double circulation part;
the drying part is provided with a heating source input port, a humidity material input port, a primary drying material output port and a first tail gas output port; the fluidization component comprises a primary dry material input port, a circulating gas input port, a final dry material output port and a second tail gas output port; the tail gas double-circulation component comprises a primary circulation structure and a secondary circulation structure;
the primary drying material output port is communicated with the primary drying material input port through a connecting part; the first tail gas output port is communicated with the input port of the primary circulation structure, the second tail gas output port is communicated with the input port of the secondary circulation structure, and the output port of the primary circulation structure and the output port of the secondary circulation structure are both communicated with the circulating gas input port.
2. The double-base serial deep powder drying system as claimed in claim 1, wherein a stirring main shaft, a disc and a jacket are arranged in the drying part;
the jacket is communicated with the heating heat source input port so as to introduce low-pressure steam;
and the humidity material falls into the drying part from the humidity material input port and performs intermittent heat exchange with the low-pressure steam introduced into the main shaft, the disc and the jacket to generate primary drying material.
3. The double-base serial powder deep drying system as claimed in claim 1 or 2, wherein the connecting part comprises a buffer bin and a metering bin which are connected in sequence; the primary dry material passes through the primary dry material delivery outlet gets into the buffer storehouse, passes through get into behind the buffer storehouse the material metering jar, pass through after the material metering jar through the primary dry material input port ration flow direction to fluidization part.
4. The double-base serial deep powder drying system according to claim 3, wherein the primary circulation structure comprises a primary cyclone dust collector and a draught fan; first tail gas passes through the drying part top sets up first tail gas delivery outlet gets into one-level cyclone, process behind one-level cyclone dust removal operation, dust in the first tail gas gets back to the buffer bin, first tail gas process after the dust removal the draught fan gets into the circulating gas input port, and then gets into the fluidization part.
5. The double-base serial deep powder drying system as claimed in claim 4, further comprising a washing tower, a Roots blower B and a heater;
and the dedusted first tail gas also enters the washing tower through the induced draft fan, enters the Roots blower B after being cooled and washed by the washing tower, enters the heater after being subjected to pressurization treatment by the Roots blower B, enters the circulating gas inlet after being heated by the heater, and further enters the fluidizing component.
6. The double-base serial deep powder drying system as claimed in claim 5, wherein the secondary circulation structure comprises a secondary cyclone dust collector, a powder tank, a filter tank and a Roots blower A;
second tail gas enters the secondary cyclone dust collector through the second tail gas outlet, after the dust removal operation of the secondary cyclone dust collector, powder of the second tail gas enters the powder tank, a part of the second tail gas after dust removal enters the Roots blower A after passing through the filter tank, enters the heater after being subjected to pressurization treatment by the Roots blower A, then enters the circulating gas inlet after being heated by the heater, and further enters the fluidizing component; and the other part of the second tail gas after dust removal enters the washing tower.
7. The double-base serial deep powder drying system according to claim 5, further comprising a circulating water pump, a primary cooler and a secondary cooler;
circulating liquid at the bottom of the washing tower enters the primary cooler after being pressurized by the circulating water pump and returns to the washing tower after passing through the primary cooler and the secondary cooler in sequence for heat exchange.
8. The dual base serial powder deep drying system of claim 1, further comprising a central down pipe; and the final dried material enters the central blanking pipe through the final dried material output port to obtain the final dried material.
9. The double-base serial deep powder drying system as claimed in claim 1, wherein the drying part is a single-shaft disc dryer or a double-shaft disc dryer.
10. The double-base serial deep powder drying system as claimed in claim 1, wherein the fluidizing component is a single-cylinder fluidized bed or a double-cylinder fluidized bed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120844725.4U CN215063239U (en) | 2021-04-23 | 2021-04-23 | Two base series connection powder degree of depth drying systems |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120844725.4U CN215063239U (en) | 2021-04-23 | 2021-04-23 | Two base series connection powder degree of depth drying systems |
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| Publication Number | Publication Date |
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| CN215063239U true CN215063239U (en) | 2021-12-07 |
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| CN202120844725.4U Active CN215063239U (en) | 2021-04-23 | 2021-04-23 | Two base series connection powder degree of depth drying systems |
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- 2021-04-23 CN CN202120844725.4U patent/CN215063239U/en active Active
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