CN109425212A - Polypropylene powder drying device - Google Patents
Polypropylene powder drying device Download PDFInfo
- Publication number
- CN109425212A CN109425212A CN201710730956.0A CN201710730956A CN109425212A CN 109425212 A CN109425212 A CN 109425212A CN 201710730956 A CN201710730956 A CN 201710730956A CN 109425212 A CN109425212 A CN 109425212A
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- Prior art keywords
- steam
- polypropylene powder
- distribution
- drying device
- recycling gas
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B17/00—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
- F26B17/18—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by rotating helical blades or other rotary conveyors which may be heated moving materials in stationary chambers, e.g. troughs
- F26B17/20—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by rotating helical blades or other rotary conveyors which may be heated moving materials in stationary chambers, e.g. troughs the axis of rotation being horizontal or slightly inclined
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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
-
- 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
- F26B25/005—Treatment of dryer exhaust gases
- F26B25/007—Dust filtering; Exhaust dust filters
-
- 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
- F26B25/04—Agitating, stirring, or scraping devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B2200/00—Drying processes and machines for solid materials characterised by the specific requirements of the drying good
- F26B2200/08—Granular materials
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention discloses a kind of polypropylene powder drying devices.The polypropylene powder drying device includes: drier, there is drying chamber in drier, the wall surface of drying chamber is equipped with first charging aperture, the first discharge port and the first recycling gas outlet, and wherein drier has collet, and collet is equipped with the first steam inlet and the first steam (vapor) outlet；Agitating shaft, agitating shaft are rotatably provided in drier, and the stirring section of agitating shaft is located in drying chamber, and wherein stirring section is equipped with the stirring blade for polypropylene powder to be pushed to the first discharge port from first charging aperture；And compressor, the air inlet of compressor and the first recycling gas outlet.Polypropylene powder drying device according to an embodiment of the present invention has many advantages, such as that drying effect is good, propylene removal efficiency is high, operating cost is low (without using nitrogen), recycling gas discharge capacity is small, equipment investment cost is low, low energy consumption, material loss is few.
Description
Technical field
The present invention relates to chemical fields, and in particular, to polypropylene powder drying device.
Background technique
It leaves and carries a certain amount of hydro carbons in the polypropylene powder of paradigmatic system, also remain in the polypropylene powder and urge
Agent, it is therefore desirable to the polypropylene powder be post-processed, the hydro carbons carried in the polypropylene powder to remove, and make this
Remaining catalyst inactivation in polypropylene powder.Wherein, the process for removing the hydro carbons carried in the polypropylene powder is known as drying
(perhaps degassing, devolatilization) makes the process of remaining catalyst inactivation in the polypropylene powder be known as decatize (or deactivation).
The post-processing approach of the existing polypropylene powder includes (1) first decatize, rear drying；(2) first dry, rear decatize and
(3) dry simultaneously and decatize.But either which kind of post-processing approach is required using nitrogen, and nitrogen and the polypropylene
Hydro carbons in powder mixes.Thus needing will using membrane separation device (or device of other energy separation of nitrogen and alkene)
Nitrogen and the separation of hydrocarbons, to not only increase the difficulty and load of Propylene Recovery System, and increase the energy consumption of device
And investment.
Summary of the invention
It is of the existing technology the purpose of the invention is to overcome the problems, such as, polypropylene powder drying device is provided, is utilized
When the polypropylene powder drying device while inactivation and dry polypropylene powder, without using nitrogen.
To achieve the goals above, the present invention provides a kind of polypropylene powder drying device, and the polypropylene powder is dry
Device includes: drier, has drying chamber in the drier, and the wall surface of the drying chamber is equipped with first charging aperture, first
Discharge port and the first recycling gas outlet, wherein the drier has collet, the collet is equipped with the first steam inlet and the
One steam (vapor) outlet；Agitating shaft, the agitating shaft are rotatably provided in the drier, and the stirring section of the agitating shaft is located at institute
It states in drying chamber, wherein the stirring section is equipped with to go out for pushing polypropylene powder to described first from the first charging aperture
The stirring blade of material mouth；And compressor, the air inlet of the compressor and the first recycling gas outlet.
The folder that polypropylene powder drying device according to an embodiment of the present invention can be passed through steam by having drier
Set, so as to the polypropylene powder intracavitary using steam heat drying, to remove the propylene carried secretly in polypropylene powder.
Polypropylene powder drying device according to an embodiment of the present invention is being stirred by the way that agitating shaft is arranged on the dryer
It is arranged on axis for polypropylene powder to be pushed to the stirring blade of the first discharge port from first charging aperture, to not only can use
Polypropylene powder in stirring blade stirring, overturning drying chamber, to make the polypropylene powder in drying chamber fully, equably
The heat that steam in contact collet passes over, and the polypropylene powder in drying chamber can be made substantially with piston stream mode
It is mobile, to keep residence time of the polypropylene powder in drying chamber uniform.
Polypropylene powder drying device according to an embodiment of the present invention is recycled by the air inlet and first for making the compressor
Gas outlet, so that the pressure in drying chamber can not only be made to be far smaller than normal pressure, (preferably, the pressure in drying chamber can be with
It is micro-positive pressure), and the pressure remained steady in drying chamber can be made.Thus without causing propylene steam (recycling gas) to gather,
It thereby may be ensured that the gas in polypropylene powder fully volatilizees, to make the propylene carried secretly in polypropylene powder substantially completely
Removing.
Wherein, by the propylene (fugitive constituent) in the polypropylene powder of the first discharge port output of polypropylene powder drying device
Content can be reduced to 1000ppm or less.Preferably, by poly- the third of the first discharge port output of polypropylene powder drying device
The content of propylene (fugitive constituent) in alkene powder can be reduced to 500ppm or less.
Since polypropylene powder drying device according to an embodiment of the present invention can be in the case where not being passed through nitrogen, substantially
Removing propylene completely, therefore the recycling gas bag being discharged includes propylene and does not include nitrogen.Thus capacity is not only considerably reduced,
And then the gas entrainment powder amount of discharge is few, material loss is few, powder reclaimer is small, powder reclaimer structure is simple, and
And without first recycling gas outlet downstream the membrane separation device for separating propylene and nitrogen be set, so as to reduce energy consumption with
Equipment investment cost.
Further, since can substantially completely remove poly- third using polypropylene powder drying device according to an embodiment of the present invention
Propylene in alkene powder, thus can be effectively reduced subsequent nitrogen displacement workshop section load and intensity, reduce nitrogen consumption and
Propylene loss.
Therefore, polypropylene powder drying device according to an embodiment of the present invention is good with drying effect, propylene removal efficiency is high,
Operating cost low (do not use nitrogen), recycling gas discharge capacity are small, reduce equipment investment cost, the advantages of low energy consumption.
Preferably, the agitating shaft is equipped with the second steam inlet and the second steam (vapor) outlet, has the in the stirring section
One heating chamber, the stirring blade is interior to have the second heating chamber being connected to first heating chamber, wherein first heating
Chamber is connected to each of second steam inlet and second steam (vapor) outlet.
Preferably, the polypropylene powder drying device further comprises discharge baffle, and the discharge baffle is vertically square
To being movably arranged in the drying chamber, the discharge baffle is between the first charging aperture and first discharge port
And neighbouring first discharge port.
Preferably, the polypropylene powder drying device further comprises drum, and the drum includes: cylinder, the cylinder
Body has accommodating chamber, and the wall surface of the accommodating chamber is equipped with second charging aperture；With the distribution of steam part of annular, the distribution of steam
Part is located in the accommodating chamber, has the open cavity in top and bottom in the distribution of steam part, the cavity with it is described
Second charging aperture connection, the lower end of the cavity constitute the second discharge port, and second discharge port and the first charging aperture connect
It is logical, wherein the distribution of steam part is equipped with multiple distribution of steam holes, the wall surface of the accommodating chamber with the distribution of steam part
Opposite part is equipped with third steam inlet.
Preferably, the cylinder is located on the drier, the upper edge of the distribution of steam part and the wall of the accommodating chamber
Face be connected, the lower edge of the distribution of steam part be arranged around the first charging aperture or the lower edge of the distribution of steam part with it is described
The edge of first charging aperture is connected.
Preferably, the polypropylene powder drying device further comprises the distribution of steam pipe of annular, the distribution of steam
Pipe is located in the accommodating chamber, and the distribution of steam pipe is arranged around the distribution of steam part, wherein the distribution of steam pipe has
4th steam inlet and the multiple third steam (vapor) outlets being connected to the 4th steam inlet.
Preferably, the polypropylene powder drying device further comprises the first pipeline, the first end of first pipeline
It is connected with the first recycling gas outlet, the second end of first pipeline is connected with the air inlet of the compressor.
Preferably, the polypropylene powder drying device further comprises: deduster, and the deduster has the first recycling
Gas import and the second recycling gas outlet, the first recycling gas import and the first recycling gas outlet；Washer, it is described
Washer has the second recycling gas import and the outlet of third recycling gas；And second pipeline and third pipeline, second pipeline
First end with it is described second recycling gas outlet be connected, the second end of second pipeline and it is described second recycle gas import phase
Even, first end with the third recycling gas outlet of the third pipeline are connected, the second end and the pressure of the third pipeline
The air inlet of contracting machine is connected.
Preferably, the polypropylene powder drying device further comprises discharge nozzle, and the discharge nozzle includes being sequentially connected
The first straight section, contraction section and the second straight section, the first end of first straight section is connected with first discharge port, the contraction
The first end of section is connected with the second end of first straight section, the first end of the second end of the contraction section and second straight section
It is connected, wherein side of the cross-sectional area of the contraction section along the second end of the first end from the contraction section to the contraction section
To reduction, second straight section is equipped with flow control valve.
Preferably, first straight section is equipped with the 5th steam inlet.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of polypropylene powder drying device according to an embodiment of the present invention；
Fig. 2 is the partial structural diagram of polypropylene powder drying device according to an embodiment of the invention；
Fig. 3 is the partial structural diagram of polypropylene powder drying device according to another embodiment of the invention.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings.Below with reference to
The embodiment of attached drawing description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
Below with reference to the accompanying drawings polypropylene powder drying device 10 according to an embodiment of the present invention is described.As shown in Figure 1-Figure 3,
Polypropylene powder drying device 10 according to an embodiment of the present invention include drier 110, agitating shaft 120 and compressor (in figure not
It shows).
There is drying chamber 111, the wall surface of drying chamber 111 discharges equipped with first charging aperture 112, first in drier 110
Mouth 113 and the first recycling gas outlet 114.Wherein, drier 110 has collet 115, and collet 115 is equipped with the first steam inlet
116 and first steam (vapor) outlet 117.
Agitating shaft 120 is rotatably provided in drier 110, and the stirring section 121 of agitating shaft 120 is located in drying chamber 111.
Wherein, stirring section 121 is equipped with the paddle for polypropylene powder to be pushed to the first discharge port 113 from first charging aperture 112
Piece 122.The air inlet of the compressor is connected to the first recycling gas outlet 114.
When polypropylene powder is dried using existing drying device, if only defeated into existing drying device
Enter water vapour, then can not remove the propylene (fugitive constituent) carried secretly in polypropylene powder completely, it is therefore desirable to existing dry dress
Set interior input water vapour and nitrogen.Thus the propylene and nitrogen for leading to blowout mix, to need first with UF membrane
Device (or device of other energy separation of nitrogen and alkene) separates propylene and nitrogen, and compressor is recycled to carry out propylene
Compression.
Polypropylene powder drying device 10 according to an embodiment of the present invention can be passed through steam by having drier 110
Collet 115, so as to using the polypropylene powder in steam heat drying chamber 111, to remove polypropylene powder inner clip
The propylene of band.
Polypropylene powder drying device 10 according to an embodiment of the present invention by drier 110 be arranged agitating shaft 120,
And the stirring blade for polypropylene powder to be pushed to the first discharge port 113 from first charging aperture 112 is set on agitating shaft 120
122, to not only can use the stirring of stirring blade 122, overturn the polypropylene powder in drying chamber 111, to make drying chamber
The heat that polypropylene powder in 111 fully, uniformly in contact with the steam in collet 115 passes over, and can make to do
Polypropylene powder in dry chamber 111 is substantially mobile with piston stream mode, to make stop of the polypropylene powder in drying chamber 111
Time is uniform.
Polypropylene powder drying device 10 according to an embodiment of the present invention by make the compressor air inlet and first time
114 connection of getter outlet, so that the pressure in drying chamber 111 can not only be made to be far smaller than the operating pressure of upstream (preferably,
Pressure in drying chamber 111 can be micro-positive pressure, about 3~15KPaG), and the pressure in drying chamber 111 can be made to keep steady
It is fixed.Thus without causing propylene steam (recycling gas) to gather, it thereby may be ensured that the gas in polypropylene powder fully volatilizees,
To remove the propylene carried secretly in polypropylene powder substantially completely.
Wherein, the propylene in polypropylene powder exported by the first discharge port 113 of polypropylene powder drying device 10 (is waved
Hair part) content can be reduced to 1000ppm or less.Preferably, by the first discharge port 113 of polypropylene powder drying device 10
The content of propylene (fugitive constituent) in the polypropylene powder of output can be reduced to 500ppm or less.
Since polypropylene powder drying device 10 according to an embodiment of the present invention can be in the case where not being passed through nitrogen, base
This removes propylene completely, therefore the recycling gas bag being discharged includes propylene and do not include nitrogen.Thus exhaust is not only considerably reduced
Amount, and then the gas entrainment powder amount being discharged is few, material loss is few, powder reclaimer is small, powder reclaimer structure is simple,
And it is not necessary that the membrane separation device for separating propylene and nitrogen is arranged in the downstream of the first recycling gas outlet 114, to reduce
Energy consumption and equipment investment cost.
Further, since can substantially completely be removed using polypropylene powder drying device 10 according to an embodiment of the present invention poly-
Propylene in propylene powder, therefore the load and intensity, reduction nitrogen consumption of subsequent nitrogen displacement workshop section can be effectively reduced
It is lost with propylene.
Therefore, polypropylene powder drying device 10 according to an embodiment of the present invention has that drying effect is good, propylene removal efficiency
High, operating cost low (not using nitrogen), that recycling gas discharge capacity is small, equipment investment cost is low, low energy consumption, material loss is few etc. is excellent
Point.
As shown in Figure 1-Figure 3, in some embodiments of the invention, polypropylene powder drying device 10 may include drum
140, drier 110, agitating shaft 120, discharge baffle 130, discharge nozzle 160, deduster 150, washer (not shown),
Two pipeline (not shown)s, third pipeline (not shown) and the compressor.
Drum 140 may include the distribution of steam part 144 of cylinder 141 and annular.Cylinder 141 has accommodating chamber 142, accommodates
The wall surface of chamber 142 is equipped with second charging aperture 143.Wherein, upstream can pass through by the preliminary polypropylene powder for flashing, deaerating
Second charging aperture 143 enters in drum 140.
As shown in Figures 2 and 3, it is preferable that second charging aperture 143 can be located on the top wall surface of accommodating chamber 142.Thus should
Polypropylene powder can enter under the effect of gravity in drum 140.Cylinder 141 may include ontology and detachable
Ground is located at the end socket on the ontology.It is possible thereby to keep the structure of drum 140 more reasonable.
Distribution of steam part 144 can be located in accommodating chamber 142, in distribution of steam part 144 there are top and bottom to open wide
Cavity 145.Cavity 145 can be connected to second charging aperture 143, and the lower end of cavity 145 may be constructed the second discharge port 148,
Second discharge port 148 can be connected to first charging aperture 112.Wherein, multiple distribution of steam can be equipped on distribution of steam part 144
Hole can be equipped with third steam inlet 147 on the part opposite with distribution of steam part 144 of the wall surface of accommodating chamber 142.Steam point
The size in multiple distribution of steam holes in cloth member 144 and distribution can be according to the places of production capacity and polypropylene powder drying device 10
Reason ability is adjusted.
Wherein, water vapour can enter in accommodating chamber 142 from third steam inlet 147, and then can be somebody's turn to do by multiple
Distribution of steam hole enters in cavity 145.The polypropylene powder entered in accommodating chamber 142 can be by the upper of cavity 145
End enters in cavity 145.Thus water vapour and the polypropylene powder can contact in cavity 145, and water vapour can make this
Catalyst in polypropylene powder loses activity, so that the polypropylene powder that is inactivated is (in fact, be in polypropylene powder
The deactivated polypropylene powder of wherein catalyst is known as the polypropylene powder inactivated for ease of description by catalyst inactivation
Material).The polypropylene powder of inactivation leaves drum 140 by the lower end of cavity 145, and then is entered by first charging aperture 112 dry
In dry chamber 111.
As shown in Figure 1, cylinder 141 can be located on drier 110, such as cylinder 141 can be welded on drier 110
On outer peripheral surface.Preferably, the lower end of accommodating chamber 142 can be opened wide, it is possible thereby to keep the structure of drum 140 more reasonable.
Along can be connected with the wall surface of accommodating chamber 142 on distribution of steam part 144.Specifically, distribution of steam part 144 is upper
Edge is fixed by bolts in the peripheral wall surfaces of accommodating chamber 142.The lower edge of distribution of steam part 144 can be set around first charging aperture 112
It sets (i.e. first charging aperture 112 can be positioned at the inside of the lower edge of distribution of steam part 144) or the lower edge of distribution of steam part 144 can
To be connected with the edge of first charging aperture 112.Thus the polypropylene powder inactivated can enter directly into drying chamber 111, from
And the structure of polypropylene powder drying device 10 can be made simpler.
Preferably, distribution of steam part 144 can be inverted round table-like.In other words, cavity 145 can be round table-like, empty
The cross-sectional area of chamber 145 can reduce from top to bottom.
As shown in figure 3, in one embodiment of the invention, polypropylene powder drying device 10 may further include ring
The distribution of steam pipe 146 of shape, distribution of steam pipe 146 can be located in accommodating chamber 142, and distribution of steam pipe 146 can be around steam point
Cloth member 144 is arranged.Wherein, distribution of steam pipe 146 has the 4th steam inlet 149 and is connected to the 4th steam inlet 149
Multiple third steam (vapor) outlets.It is possible thereby to enter water vapour more uniformly in accommodating chamber 142, so more uniformly into
Enter into cavity 145, to more uniformly, more thoroughly make the catalyst inactivation in polypropylene powder.
As shown in Figure 1, drier 110 can be horizontal drier.Horizontal drier 110 can have first charging aperture
112 and first discharge port 113.Preferably, first charging aperture 112 can be located at drier 110 first end top, first
Discharge port 113 can be located at the bottom of the second end of drier 110.
In agitating shaft 120 is rotatably provided on drier 110, the stirring section 121 of agitating shaft 120 is located at drying chamber 111
It is interior.Stirring section 121 is equipped with the stirring blade for polypropylene powder to be pushed to the first discharge port 113 from first charging aperture 112
122。
Preferably, stirring blade 122 can be multiple, and multiple stirring blades 122 constitute multiple stirring blade groups, each should
Stirring blade group may include at least two stirring blades 122.Wherein, multiple stirring blade groups can be along stirring section 121
Equal spacing in length direction it is arranged, at least two stirring blades 122 of each stirring blade group can be along the week of stirring section 121
To being equally spacedly arranged.
Multiple stirring blades 122 not only can stir preferably, overturn polypropylene powder in drying chamber 111, to make
The heat that polypropylene powder in drying chamber 111 fully, uniformly in contact with the steam in collet 115 passes over, Er Qieke
So that the polypropylene powder in drying chamber 111 is mobile with piston stream mode, to stop polypropylene powder in drying chamber 111
Stay the time more uniform.
In some examples of the invention, it can be equipped with the second steam inlet and the second steam (vapor) outlet on agitating shaft 120, stir
Mixing can have the first heating chamber in section 121, can have the second heating being connected to first heating chamber in stirring blade 122
Chamber (according to equipment disposal ability, can not also set the second heating chamber).Wherein, first heating chamber and second steam inlet and this
The connection of each of second steam (vapor) outlet.
It, can be respectively to first after polypropylene powder (such as polypropylene powder of inactivation) enters in drying chamber 111
Steam inlet 116 and second steam inlet are passed through water vapour.Specifically, from the water vapour that the first steam inlet 116 is passed through into
Enter into collet 115, to be heated from the outside of polypropylene powder to polypropylene powder.It is passed through from second steam inlet
Water vapour enter in first heating chamber and second heating chamber, so that the inside from polypropylene powder is to polypropylene powder
It is heated.Water vapour and/or condensed water in collet 115 leave collet 115 from the first steam (vapor) outlet 117, first heating
Water vapour and/or condensed water in chamber and second heating chamber from second steam (vapor) outlet leave first heating chamber and this second
Heating chamber.
By first heating chamber being arranged in stirring section 121 and setting and first heating chamber in stirring blade 122
Second heating chamber of connection, so as to from the inside and outside of polypropylene powder while heat polypropylene powder, so as to more
The propylene thoroughly carried secretly in removing polypropylene powder, improves steam thermal utilization, to reach the effect for further decreasing energy consumption
Fruit.
As shown in Figure 1, polypropylene powder drying device 10 may further include discharge baffle 130, discharge baffle 130 can
Be movably arranged in drying chamber 111 along the vertical direction.Wherein, discharge baffle 130 can be located at first charging aperture 112 and the
Between one discharge port 113, discharge baffle 130 can neighbouring first discharge port 113.Wherein, the arrow A of up and down direction as shown in figure 1
It is shown.
By the way that moveable discharge baffle 130 in the up-down direction is arranged, so as to adjust poly- third in drying chamber 111
The controlling level of alkene powder, and then processing capacity and residence time of the adjustable polypropylene powder in drying chamber 111.Thus
When the treating capacity of drier 110 changes, it is ensured that residence time of the polypropylene powder in drying chamber 111 is substantially not
Become.Specifically, (entering the polypropylene powder in drying chamber 111 in the unit time when the treating capacity of drier 110 increases
Material increases), discharging baffle 130 can be moved up, (is entered in the unit time when the treating capacity of drier 110 reduces
Polypropylene powder in drying chamber 111 is reduced), discharge baffle 130 can be moved down.
As shown in Figure 1, horizontal drier 110 can have the first recycling gas outlet 114.Preferably, the first recycling gas
Outlet 114 can be located at the top of the second end of drier 110.The air inlet of the compressor can be with the first recycling gas outlet
114 connections.
In an example of the invention, as shown in Figure 1, polypropylene powder drying device 10 may further include dedusting
Device 150, washer, the second pipeline and third pipeline.
Deduster 150 have first recycling gas import 151 and second recycling gas outlet 152, first recycling gas import 151 with
First recycling gas outlet, 114 connection.Preferably, deduster 150 can be located on drier 110, first recycling gas import 151 with
First recycling gas outlet 114 is connected directly, that is, the recycling gas (propylene) for leaving the first recycling gas outlet 114 can be directly by first
Recycling gas import 151 enters in deduster 150.
The washer can have the second recycling gas import and the outlet of third recycling gas.The first end of second pipeline can be with
It is connected with the second recycling gas outlet 152, the second end of second pipeline can be connected with the second recycling gas import.The third pipe
The first end on road can recycle gas outlet with the third and be connected, and the second end of the third pipeline can be with the air inlet of the compressor
It is connected.
Deduster 150 can remove the polypropylene powder of recycling gas entrainment, which can remove recycling gas folder
The sour gas of band (sour gas can be decomposed by catalyst inactivation and be generated).Preferably, which can be scrubbing tower.
Drop and acidic liquid are formed in deduster 150 in order to prevent, heat tracing pipe can be set on deduster 150
157 (such as steam companions or electric tracing tubes), to make the recycling gas temperature with higher in deduster 150.
Deduster 150 can be dome structure, and deduster 150 may include detachable end socket, the shell with heat tracing pipe
153, bag hose 154 (including cage bone and antistatic filter bag), bag hose aperture card, blowback air drum 155,156 and of solenoid valve
Blowback air distributor pipe.
After 154 long-play of bag hose, the surface aggregation polypropylene powder in filter bag is understood, in order to guarantee filter effect,
It needs periodically to expand the polypropylene powder for blowing down filter bag surface with blowback air.Blowback air can use compression propylene gas after the recovery,
It is also possible to fresh propylene gas, after blowback air is decompressed to 0.4MPaG~0.6MPaG, into blowback air drum 155, leads to
156 blowback filter bag of timing control solenoid valve is crossed, filter bag is made to remove the polypropylene powder of attachment between expansion, retraction.According to setting
The needs of standby installation and disassembly cleaning, can use flanged joint between deduster 150 and drier 110.
In another example of the invention, polypropylene powder drying device 10 may further include the first pipeline (figure
In be not shown), the first end of first pipeline can be connected with the first recycling gas outlet 114, and the second end of first pipeline can
To be connected with the air inlet of the compressor.It is possible thereby to keep the structure of polypropylene powder drying device 10 simpler.Wherein, it is
The polypropylene powder and sour gas of recycling gas entrainment are removed, strainer can be set at the first recycling gas outlet 114, it should
The adsorbent materials such as active carbon can be equipped on strainer.
As shown in Figure 1, in a specific example of the invention, polypropylene powder drying device 10 may further include
Discharge nozzle 160, discharge nozzle 160 may include that the first straight section 161, contraction section 162 and the second straight section being sequentially connected (do not show in figure
Out).Subsequent nitrogen can be entered by discharge nozzle 160 by the polypropylene powder that the first discharge port 113 leaves drying chamber 111
Replace degassing system.
The first end of first straight section 161 can be connected with the first discharge port 113, and the first end of contraction section 162 can be with
The second end of one straight section 161 is connected, and the second end of contraction section 162 can be connected with the first end of second straight section.Wherein, it shrinks
The cross-sectional area of section 162 reduces along the direction of the second end of the first end from contraction section 162 to contraction section 162.In other words, it receives
The cross-sectional area of contracting section 162 can reduce from top to bottom.
Flow control valve can be equipped on second straight section.Poly- third in the adjustable discharge nozzle 160 of the flow control valve
The flow of alkene powder, so as to the material envelope kept certain height in contraction section 162, it is possible thereby to which subsequent nitrogen is avoided to replace
In the gas trains of workshop section to drier 110.
As shown in Figure 1, contraction section 162 can be it is inverted round table-like.The cross-sectional area of first straight section 161, which can be equal to, to be received
The maximum cross-section area of contracting section 162, the cross-sectional area of second straight section can be equal to the smallest cross-section area of contraction section 162.
Preferably, as shown in Figure 1, the 5th steam inlet 163 can be equipped on the first straight section 161.According to different technique
It needs, steam can be passed through into the first straight section 161 from the 5th steam inlet 163.
The beneficial effects of the present invention are: first inactivated in drier 110 to polypropylene powder, take off afterwards hydro carbons (fugitive constituent) and
It is dry；When polypropylene powder inactivates, water vapour comes into full contact with polypropylene powder, and Inactivation Effect is good；The dry dress of polypropylene powder
Set 10 used device it is few, equipment produce intensity it is big；Drier 110 uses the agitating shaft 120 and stirring blade 122 of interior heating,
Heat utilization efficiency is high, and stirring intensity is big and uniform, and drying effect is good, and residence time of material is uniform, and low energy consumption, and hydrocarbon recovery is high；
The recycling gas capacity of drier 110 is few, predominantly a small amount of hydro carbons of steam and volatilization, and entrainment powder amount is few, and material loss is few,
Powder reclaimer is small, and structure is simple；It recycles in gas without nitrogen, does not need membrane separation device, gas concentration unit is simple, equipment
It is small, it invests low；110 auxiliary device of drier is few, easy to operate, good operation stability；It deaerates (fugitive constituent) and drying effect is good,
Exporting hydro carbons entrainment in powder less, can effectively reduce the load and intensity of subsequent workshop section's nitrogen displacement, reduce nitrogen consumption, also drop
The loss of low propylene.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " be orientation based on the figure or
Positional relationship is merely for convenience of description of the present invention and simplification of the description, rather than the device or element of indication or suggestion meaning must
There must be specific orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the present invention, the meaning of " plurality " is at least two, such as two, three
It is a etc., unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect
It connects, is also possible to be electrically connected or can communicate each other；It can be directly connected, can also indirectly connected through an intermediary, it can be with
It is the interaction relationship of the connection or two elements inside two elements, unless otherwise restricted clearly.For this field
For those of ordinary skill, the specific meanings of the above terms in the present invention can be understood according to specific conditions.
In the present invention unless specifically defined or limited otherwise, fisrt feature in the second feature " on " or " down " can be with
It is that the first and second features directly contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of
First feature horizontal height is higher than second feature.Fisrt feature can be under the second feature " below ", " below " and " below "
One feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Claims (10)
1. a kind of polypropylene powder drying device characterized by comprising
Drier, the drier is interior to have drying chamber, and the wall surface of the drying chamber is equipped with first charging aperture, the first discharge port
With the first recycling gas outlet, wherein the drier has collet, the collet is equipped with the first steam inlet and the first steam
Outlet；
Agitating shaft, the agitating shaft are rotatably provided in the drier, and the stirring section of the agitating shaft is located at the drying
It is intracavitary, wherein the stirring section is equipped with for pushing polypropylene powder to first discharge port from the first charging aperture
Stirring blade；With
Compressor, the air inlet of the compressor and the first recycling gas outlet.
2. polypropylene powder drying device according to claim 1, which is characterized in that the agitating shaft is equipped with second and steams
Vapor inlet and the second steam (vapor) outlet have the first heating chamber in the stirring section, have in the stirring blade and described first
Second heating chamber of heating chamber connection, wherein first heating chamber and second steam inlet and second steam (vapor) outlet
Each of connection.
3. polypropylene powder drying device according to claim 1, which is characterized in that it further comprise discharge baffle, institute
Discharge baffle is stated to be movably arranged at along the vertical direction in the drying chamber, the discharge baffle be located at the first charging aperture with
Between first discharge port and adjacent to first discharge port.
4. polypropylene powder drying device according to claim 1, which is characterized in that it further comprise drum, the vapour
Packet includes:
Cylinder, the cylinder have accommodating chamber, and the wall surface of the accommodating chamber is equipped with second charging aperture；With
The distribution of steam part of annular, the distribution of steam part are located in the accommodating chamber, have upper end in the distribution of steam part
With the open cavity in lower end, the cavity is connected to the second charging aperture, and the lower end of the cavity constitutes the second discharge port,
Second discharge port is connected to the first charging aperture, wherein the distribution of steam part is equipped with multiple distribution of steam holes, institute
The part opposite with the distribution of steam part for stating the wall surface of accommodating chamber is equipped with third steam inlet.
5. polypropylene powder drying device according to claim 4, which is characterized in that the cylinder is located at the drier
On, the upper edge of the distribution of steam part is connected with the wall surface of the accommodating chamber, and the lower edge of the distribution of steam part is around described first
The lower edge of feed inlet setting or the distribution of steam part is connected with the edge of the first charging aperture.
6. polypropylene powder drying device according to claim 4 or 5, which is characterized in that further comprise the steaming of annular
Vapour distributor pipe, the distribution of steam pipe are located in the accommodating chamber, and the distribution of steam pipe is arranged around the distribution of steam part,
Described in distribution of steam pipe there are the 4th steam inlet and multiple third steam (vapor) outlets for being connected to the 4th steam inlet.
7. polypropylene powder drying device according to claim 1, which is characterized in that further comprise the first pipeline, institute
The first end for stating the first pipeline is connected with the first recycling gas outlet, second end and the compressor of first pipeline
Air inlet is connected.
8. polypropylene powder drying device according to claim 1, which is characterized in that further comprise:
Deduster, the deduster have first recycling gas import and second recycling gas outlet, it is described first recycling gas import with
The first recycling gas outlet；
Washer, the washer have the second recycling gas import and the outlet of third recycling gas；And
Second pipeline and third pipeline, the first end of second pipeline are connected with the second recycling gas outlet, and described second
The second end of pipeline is connected with the second recycling gas import, the first end of the third pipeline and the outlet of third recycling gas
It is connected, the second end of the third pipeline is connected with the air inlet of the compressor.
9. polypropylene powder drying device according to claim 1, which is characterized in that it further comprise discharge nozzle, it is described
Discharge nozzle includes the first straight section, contraction section and the second straight section being sequentially connected, the first end of first straight section and described first
Discharge port be connected, the first end of the contraction section is connected with the second end of first straight section, the second end of the contraction section and
The first end of second straight section is connected, wherein the cross-sectional area of the contraction section is along the first end from the contraction section to institute
The direction for stating the second end of contraction section reduces, and second straight section is equipped with flow control valve.
10. polypropylene powder drying device according to claim 9, which is characterized in that first straight section is equipped with the
Five steam inlets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710730956.0A CN109425212A (en) | 2017-08-23 | 2017-08-23 | Polypropylene powder drying device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710730956.0A CN109425212A (en) | 2017-08-23 | 2017-08-23 | Polypropylene powder drying device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109425212A true CN109425212A (en) | 2019-03-05 |
Family
ID=65499198
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710730956.0A Pending CN109425212A (en) | 2017-08-23 | 2017-08-23 | Polypropylene powder drying device |
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| Country | Link |
|---|---|
| CN (1) | CN109425212A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112480291A (en) * | 2020-12-10 | 2021-03-12 | 天华化工机械及自动化研究设计院有限公司 | Method for further improving quality of polypropylene product produced by gas phase method |
-
2017
- 2017-08-23 CN CN201710730956.0A patent/CN109425212A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112480291A (en) * | 2020-12-10 | 2021-03-12 | 天华化工机械及自动化研究设计院有限公司 | Method for further improving quality of polypropylene product produced by gas phase method |
| CN112480291B (en) * | 2020-12-10 | 2023-04-07 | 天华化工机械及自动化研究设计院有限公司 | Method for further improving quality of polypropylene product produced by gas phase method |
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