CN208006021U - Substance law vinyl chloride agitating device - Google Patents

Abstract

A kind of substance law vinyl chloride agitating device, including driving motor, agitating shaft, blender, agitating shaft and blender are hollow structure, are characterized in that：Stirrer bottom is closed, cooling water inlet and cooling water outlet are equipped at the top of agitating shaft, the channel I being connected with cooling water outlet positioned at middle part is equipped in agitating shaft, the channel peripheries I are equipped with the channel II being connected with cooling water inlet, and cooling water circulation is formed between cooling water inlet, channel II, channel I and cooling water outlet.It has the advantages that simple and compact for structure, good cooling results, operational process are reliable and stable, maintenance cost is low etc..

Description

Substance law vinyl chloride agitating device

Technical field

The utility model is related to chemical industry mixing equipment, specifically a kind of substance law vinyl chloride agitating device, master It is adapted to the preparation of polyvinyl chloride substance law.

Background technology

There are mainly three types of the production methods of existing polyvinyl chloride resin, i.e. suspension method, emulsion method and substance law.Wherein, substance law is poly- Vinyl chloride (M-PVC) technique is the patented technology of French atropic company, is succeeded in developing in 1956.And it is " holy in Lyons of France Fang Si " has built up the first in the world set industrial production device, is referred to as at that time " one-step method ".There are 18 12m³Horizontal rotary it is poly- Kettle is closed, polymeric kettle itself rotation, kettle is interior to play stirring action equipped with the stirring of fried dough twist type and stainless steel ball, prevents powder agglomates and gathers It closes object and glues wall.

The said firm has succeeded in developing " two step method " again in nineteen sixty, i.e., polymerisation is carried out in two steps.The first step is pre-polymerization Close, carried out in prepolymerization reactor, be added 1/3~1/2 and corresponding initiator of monomer total amount, polymerisation conversion control 8%~ 12%.Second step is polymerization, is carried out in polymeric kettle, after prepolymerized material is transferred to, then remaining vinyl chloride monomer is added Enter, and supply initiator, when polymerisation conversion reaches 70%~80%, polymerisation terminates.But there are still have material for the technique It puts endless, the shortcomings of clear kettle is difficult, and finished product " flake " is more, and remaining vinyl chloride monomer content is high.Until the said firm in 1978 again It is secondary succeeded in developing " two-part polymeric kettle " after, that is, use vertical autoclave, just successfully solve heat transfer, stirring, recycling, from Control, a series of problems, such as resin quality is poor, make the production of M-PVC reach the stage of maturation.

In mass polymerization kettle, with the production-scale continuous expansions of PVC, large-scale polymeric kettle has been widely used.Usually By volume 30m³Kettle below becomes small pot, by 70 m of volume³Above kettle becomes large-scale kettle.Production not only can be improved in large-scale kettle Quality and homogeneity, and floor space is small, and capital expenditure is also corresponding relatively low.

By largely analyzing and testing it is found that the heat-transfer capability of autoclave body is the key that restrict one of its production capacity, about 60% Heat exchanged by reflux condenser, about 30% heat is exchanged by reaction kettle wall, and about 10% heat passes through cooling and stirring Systems exchange.Since polyvinyl chloride synthesis belongs to strong exothermal reaction, and existing reaction kettle cooling effect is limited, if cannot keep The stabilization of temperature can then cause the generation of a large amount of side reaction products.

Existing mass polymerization kettle, it is " a kind of as disclosed in the utility model patent that Authorization Notice No. is CN2839283Y The large-scale polymeric kettle of vinyl chloride mass polymerization ", the technical solution include autoclave body, transmission device, blender, polymerisation DCS Control system, its main feature is that：Transmission device includes the underdrive device for being located at upper transmission device and bottom at the top of autoclave body, stirring Device includes the upper blender for being located at autoclave body internal upper part and the lower blender of bottom, and autoclave body straight section outer wall is installed with quick opening manhole, spiral shell Half-pipe jacket is revolved, spiral stream guidance chuck is installed on autoclave body bottom outer wall.The technical solution has the following defects：Although filler is close Seal structure is simpler, it is more convenient to safeguard, but due to the raising of system temperature in polymerization process, airtight and watertight padding is caused to fall into reactant System, and then affect the quality of final products.Although the technical solution is referred to inside blender uses hollow-core construction, convenient for cold But flow is logical so as to making up the insufficient defect of jacket for heat exchange, but since the part needs ensureing agitating shaft spin stabilization premise Under to ensure leakproofness and cooling effect, those skilled in the art can not be on the basis of the technical solution in conjunction with the normal of this field It advises technological means and associates its concrete structure easily, because above structure is not the common knowledge of this field.

" a kind of polyvinyl chloride enlargement resin as disclosed in the utility model patent that Authorization Notice No. is CN205387556U Polymeric kettle ", the technical solution include polymeric kettle ontology, agitating shaft, blender, axle envelope and transmission device, and the agitating shaft is interior Outer double layer hollow structure, formed cooling water into the autonomous channel that goes out, the blender is hollow structure and internal setting water conservancy diversion Cooling water is arranged into and out of channel in channel between the blender and agitating shaft, described this volume surrounding of polymeric kettle is additionally provided with cooling Water leg.Although the technical solution can by cooling water polymeric kettle it is inside and outside be carried out at the same time circulate take away polymerization process production Raw heat can effectively realize the uniform cooling of material in polymeric kettle.But those skilled in the art only illustrate secretary by this The content of load has no way of learning cooling water how in lower spindle nose（304）From sleeve in the case of lasting rotation（307）Into outer stirring Central siphon cooling water inlet（3011）, how cooling water is in lower spindle nose（304）From central shaft tube in the case of lasting rotation（302）Stream Central siphon cooling water outlet is stirred out（3012）, because above structure is not the common knowledge of this field.

Utility model content

The purpose of this utility model is to provide a kind of substance law vinyl chloride agitating device, fundamentally solves above-mentioned ask Topic, has the advantages that simple and compact for structure, good cooling results, operational process are reliable and stable, maintenance cost is low etc..

To achieve the above object, the utility model provides following technical solution：The substance law vinyl chloride agitating device Including driving motor, agitating shaft, blender, agitating shaft and blender are hollow structure, are characterized in that：Stirrer bottom seals It closes, cooling water inlet and cooling water outlet is equipped at the top of agitating shaft, is equipped with positioned at middle part and cooling water outlet phase in agitating shaft The channel I of connection, the channel peripheries I are equipped with the channel II that is connected with cooling water inlet, cooling water inlet, channel II, channel I with And cooling water circulation is formed between cooling water outlet.

Channel I and channel II are connected with the hollow structure of blender respectively.

Inverted cone-shaped structure is equipped in agitating shaft.

Blender is spiral agitator, is equipped with helical duct in helical blade, the top and bottom of helical duct are set respectively There is flow-guiding mouth, the flow-guiding mouth at the top of helical duct is connected with channel II, and the flow-guiding mouth of helical duct bottom is connected with channel I It is logical.

Helical blade is made of the arc panel being fixed on agitating shaft outer wall of a pair of opposing, is equipped between arc panel Middle partition board and support column.

The beneficial effects of the utility model：Packing seal is adapted as mechanical seal, not only overcomes original mechanical seal It is unfavorable for the defect of Maintenance and Repair, mechanical seal can be directly replaced in the case where not tearing motor for speed reducer open；And it overcomes Packing seal leads to the problem of product quality homogeneity difference.Facilitate installation maintenance, reduces the repair time of equipment, and then improve Production efficiency.

It is polished by electrolytic polishing, autoclave body inside surface roughness, blender I, blender II is made to be contacted with reaction medium Outer surface roughness Ra≤0.08 μm shortens the production cycle, improves production efficiency to effectively reduce clear kettle number.

Blender I（Spiral agitator）Until bottom pushes and ties up while stirring progress at the top of from polymeric kettle Hold the shuttling movement up and down of powder.In addition, being equipped with blender II in reactor bottom（Anchor scraper blender）, stirrer bottom It is matched with reaction kettle bottom surface curve.On the one hand blender II can prevent particle from forming precipitation in liquid phase reactor, on the other hand It can be in powder phase reaction to blender I feedings.Two blenders are low-speed running, are realized by configuring variable-frequency governor Speed of agitator needed for production.The screw rod blade of blender I is using double cambered surfaces（Concave structure）, coordinate outer surface Ra<0.08 μm, have Effect reduces raw material and sticks on blender I.

Although screw agitator and hanging plate/scraping cutter type stirrer to be belonged to the routine of this field for the blender of polymeric kettle The choice of technology, but how to ensure the leakproofness between agitating shaft and blender under the premise of ensureing that blender stablizes rotation, Ensure that the cooling effect of blender is not those skilled in the art and can associate easily simultaneously.

Autoclave body thickness 26+3mm, Q345R are by 16Mng, 19Mng and GB6654-1996 in GB713-1997 16MnR merges, and due to wherein containing a certain amount of alloying element, has higher yield strength.Thickness as defined in GB150 Ranging from 3mm ~ 200mm, phosphorus content is not high, and weldability is preferable, as thickness≤34mm, has good machinability, i.e., Make process without preheating, not will produce hot and cold crackle.But it equally will produce when thickness is big, environment temperature is low Hot and cold crackle is preheated before processing to eliminate its internal stress.

Under the premise of ensureing autoclave body rigidity, using the composite board of above-mentioned thickness, compared to using the single materials of Q345R Manufactured autoclave body not only remains the low performance of Q345 thermal resistance values, and as a result of composite so that total quality is more Gently, manufacturing cost is lower.It is maximum to have played each monomer plank monomer workability due to the thickness smaller of each monomer.Meanwhile Q345R and S31603 has better compatibility and conductivity of heat.Therefore, manufacturing process is greatlied simplify.Conducive to autoclave body volume to Enlargement development, it is less by or avoid fabrication process condition and restricted, extend the service life of polymeric kettle.

After the volume of autoclave body is amplified according to the parameter of geometric scale-up and blender according to dynamic similarity, volume be by According to m³Grade amplification, heat exchange area is according to m²Amplification passes through so needing to consider the hot theory of similarity of chemical engineering process Increase jacket for heat exchange area supplement amplification after heat exchange area insufficient section, at present the country those skilled in the art can not consummation answer Equipment is researched and developed with above-mentioned comprehensive theory.Compared to volume 50m³Polymeric kettle, the utility model one-pot production capacity up to 30,000 tons/year, Volume improves 40%, and production capacity improves 50%.

Half-pipe jacket is coiled on autoclave body outer wall, and using segmental influent, water flowing out structure.That is, each chuck is cooled down single It is first in parallel, it not only effectively reduces entire chuck while the probability of " short circuit phenomenon " occurs, and reduce cooling water in chuck In flow resistance, to improve the heat-transfer capability of chuck.In addition, external condenser is provided in autoclave body, preferably to complete Heat heat exchange.（Condenser belongs to ordinary skill in the art selection, no longer elaborates its structure herein）.

Description of the drawings

Fig. 1 is the schematic cross-sectional view of the utility model；

Fig. 2 is the partial enlargement structural representation of part A in Fig. 1；

Fig. 3 is the partial enlargement structural representation of part B in Fig. 1；

Fig. 4 is the partial enlargement structural representation of C portion in Fig. 1；

Fig. 5 is the structural schematic diagram of the utility model blender I；

Fig. 6 is schematic cross-sectional views of the Fig. 5 along line D-D；

Fig. 7 is schematic cross-sectional views of the Fig. 6 along F-F lines；

Fig. 8 is schematic cross-sectional views of the Fig. 5 along E-E lines；

Fig. 9 is schematic cross-sectional views of the Fig. 8 along G-G lines；

Figure 10 is schematic cross-sectional views of the Fig. 8 along H-H lines；

Figure 11 is schematic cross-sectional views of the Figure 10 along K-K lines；

Figure 12 is schematic cross-sectional views of the Fig. 8 along I-I lines；

Figure 13 is Fig. 8 from J to the structural schematic diagram being unfolded along outer tube outer wall.

Reference sign：1 driving motor I, 2 cooling water outlet I, 3 cooling water inlet I, 4 condensers, 5 hydraulic cylinder I, 6 Agitating shaft I, 7 blender I, 8 half-pipe jackets, 9 agitating shaft II, 10 mechanical seals, 11 hydraulic cylinder II, 12 rack II, 13 shaft couplings, 14 speed reducer II, 15 cooling water inlet II, 16 cooling water outlet II, 17 driving motor II, 18 blender II, 19 quick opening manholes, 20 autoclave bodies, 21 filters, 22 rack I, 23 speed reducer I, 24 variable-frequency governors, 25 channel I, 26 channel II, 27 agitating shaft I are empty Chamber, 28 bottom plates, 29 mounting bases, 30 base bearing I, 31 end caps, 32 hollow shaft I, 33 hollow shaft II, 34 base bearing II, 35 speed reducers Input shaft, 36 rack I base bearings, 37 channel III, 38 channel IV, 39 channel III imports, the outlets 40 channel IV, 41 closure plate I, 42 Partition board, 50 top plates, 51 supports in upper sealing plate, 44 partition boards, 45 closure plate II, 46 times sealing plates, 47 outer arc plate II, 48 inner arc plate II, 49 Column, 52 inner arc plate I, 53 outer arc plate I, 54 rack II base bearings, 55 hollow shaft IV, 56 helical ducts, 57 deflectors, 58 hollow shafts III。

Specific implementation mode

Below in conjunction with Fig. 1 ~ 13, the content of the utility model is described in detail by specific embodiment.Using the agitating device Substance law vinyl chloride polymeric kettle include the autoclave body 20 for being equipped with blender I 7 and blender II 18.Pacify respectively on autoclave body Condenser 4 and filter 21 are filled, and quick opening manhole 19 is installed in autoclave body side, features described above is existing in the prior art more Detailed description, and role is same as the prior art herein, is not described in detail its structure.It is entire to increase Blender I 7 and its agitating shaft I 6 or blender II 18 and its agitating shaft II 9 is used hollow knot by the heat exchange efficiency of system Structure, 7 bottom locks of blender I, 18 top seals of blender II（Position restriction relationship in text, such as top, bottom, only It and is reference with the coordinate system of Fig. 1 for convenience of description to be, and refers not to the position of each component in actual installation）.Agitating shaft I 6 Top is equipped with cooling water inlet I and cooling water outlet I, and the bottoms agitating shaft II are equipped with cooling water inlet II and cooling water outlet II 16.Be equipped with the channel I 25 being connected with cooling water outlet I positioned at middle part in agitating shaft I 6,25 peripheries channel I be equipped with The channel II 26 that cooling water inlet I 2 is connected, cooling water inlet I 2, channel II 26, channel I 25 and cooling water outlet Cooling water circulation is formed between I.

In addition, to improve the heat transfer effect of autoclave body outer wall, half-pipe jacket is set on autoclave body outer wall, to ensure autoclave body chuck 8, and by the parallel connection of each pipeline, constitute several half-pipe jacket heat exchange units.On the one hand it can reduce the flow resistance of cooling water in chuck, On the other hand all pipelines be can avoid and the case where " short circuit " occur simultaneously.

At the top of autoclave body, 1 output shafts of driving motor I pass through shaft coupling（Attached drawing is unmarked）It is rigid with speed reducer input shaft 35 Property connection（For convenience of the rotating speed of control driving motor I or driving motor II, and variable-frequency governor 24 is set）, speed reducer input shaft 35 by the torque of driving motor I 1 after a series of gear shaft and gear speed governing by finally passing to hollow shaft I 32.It is hollow Axis I 32 is the output shaft of speed reducer I 23, and hollow shaft I 32 is by being located at bearing block（It is unmarked in figure）Interior base bearing I 30 It is sealed in speed reducer I 23, and by end cap 31 with the limits of base bearing II 34.32 bottoms hollow shaft I by shaft coupling 13 with Agitating shaft I 6 is connected, and hollow shaft II 33 is bolted on the top of hollow shaft I 32, in hollow shaft II 33 and cooling water Circumferentially arranged with several deflector holes in 3 corresponding height of import I（It is unmarked in figure）Even if to can guarantee in hollow shaft II In the case of 33 lasting rotations, cooling water inlet I 3 is kept to remain stationary as, and cooling water is passed into channel II 26.

The structure of autoclave body bottom is similar to autoclave body top structure, and 17 output shafts of driving motor II are defeated with speed reducer II's 14 Enter axis（It is unmarked in figure）Rigid connection, the input shaft of speed reducer II after a series of gear shaft and gear speed governing by finally will The torque of driving motor II 17 passes to hollow shaft III 58.Hollow shaft III 58 is the output shaft of speed reducer II 17, hollow Axis III 58 is by being located at bearing block（It is unmarked in figure）Interior base bearing（It is unmarked in figure）Limit is led in speed reducer II Cross end cap（It is unmarked in figure）Sealing.Hollow shaft IV 55 is bolted on the bottom of hollow shaft III 58, hollow shaft III 58 tops are connected by shaft coupling 13 with agitating shaft II 9, are set in the height corresponding with cooling water inlet II 15 of hollow shaft IV 55 There are several deflector holes（It is unmarked in figure）Even if to can guarantee in the case where hollow shaft IV 55 persistently rotates, cooling is kept Water inlet II 15 is remained stationary as, and cooling water is passed into channel IV 38.

Blender I 7 is spiral agitator, and helical duct 56, the top and bottom of helical duct 56 are equipped in helical blade It is respectively equipped with flow-guiding mouth 43, the flow-guiding mouth at 56 top of helical duct is connected with channel II, the flow-guiding mouth 43 of helical duct bottom It is connected with channel I 25.

Agitating shaft flow-guiding mouth at the top and bottom of autoclave body（It is unmarked in figure）On be respectively equipped with mounting base 29, set in mounting base There is bottom plate 28, rack I 22 for limiting agitating shaft I 6 is respectively fixed on bottom plate 28 and for limiting agitating shaft II's The side setting hydraulic cylinder II 11 of the side setting hydraulic cylinder I 5 of rack II 12, rack I, rack II, the setting side of hydraulic cylinder Formula is same as the prior art, is not described in detail.Between agitating shaft I 6 and the bottom plate 28 of rack I 22 or agitating shaft II 9 with Mechanical seal 10 is equipped between the bottom plate of rack II 12.

The channel I 25 of agitating shaft I 6 is variable-diameter structure, by being arranged between shaft coupling installation site and helical blade Inverted cone-shaped structure（As shown in the bottoms Fig. 2, attached drawing is unmarked）, inverted cone-shaped structure top is channel I, and inverted cone-shaped structure lower part is to stir Mix axis I cavitys 27.

The installation of agitating shaft I limits, specially：The top of agitating shaft I drive outputs is rigidly attached to by shaft coupling On hollow shaft I 32, middle part is limited by the bearing block equipped with rack I base bearings 36 in rack I, and in bearing block and stirring Sealing ring is set between axis, and lower part is limited by mechanical seal 10 on bottom plate 28.Preferably, inverted cone-shaped structure setting is being stirred Mix the part of axis I.The installation limit of agitating shaft II is similar to agitating shaft I, and middle part is by with organic frame II base bearings 54 Bearing block limits.

To increase heat exchange area, in blender I（Screw agitator）Helical blade in be arranged cooling-water duct.Helical-blade Piece is made of upper and lower two pieces of arc panels, the gap ecto-entad between arc panel set gradually the top plate 50 of plug, support column 51, Middle partition board 49, arc panel outside are gradually collapsed and are blocked by top plate 50, be directly welded on agitating shaft outer wall on the inside of arc panel. Wherein, top plate 50, support column 51,49 height of middle partition board gradually increase, to which two pieces of arc panels shape, and as arc panel Support construction.It is provided with to form spiral helicine cooling-water duct between middle partition board 49, arc panel and agitating shaft outer wall The structural support of power.

Further, arc panel uses double-layer structure（As shown in Figure 9）, outer arc plate I 53 and 47 left ends of outer arc plate II are straight It connecing and is welded on agitating shaft I outer walls, right end is shut by top plate 50, and partition board 44 is arranged between middle partition board and agitating shaft I outer walls, Inner arc plate I 52 and inner arc plate II 48 is respectively set in about 44 both sides of partition board, and helical blade upper end is closed by upper sealing plate 42, It is closed by lower sealing plate 46 helical blade lower end.

Cooling water is rotated down flowing in gravity and the channel II for the collective effect lower edge annular for forming eddy flow, exists along setting Flow-guiding mouth at the top of helical blade enters spiraled cavity, and continues in gravity and formed under the collective effect of eddy flow along helical duct It flows downward, when reaching stirrer bottom, is entered in 6 cavitys of agitating shaft I from the flow-guiding mouth of helical blade bottom, then Continue to flow out cooling water outlet I under the action of overcoming gravity with minimum resistance along channel I.Channel II is to be arranged in channel I External loop configuration, cooling water can form stable eddy flow in the II of channel, and eddy flow is transferred to helical duct 56, spiral Channel roof is closed by closure plate I 41, and by current deflecting to top flow-guiding mouth, helical duct bottom passes through 45 envelopes of closure plate II It closes, by current deflecting to lower part flow-guiding mouth, the stroke of cooling water can be increased by eddy flow, accelerate the flowing velocity of cooling water.

Blender II 18 is scraper blender, for convenience of the assembly of blender II 18, its middle part is arranged to and is stirred The tubular structure is fixed at the top of agitating shaft II by the matched tubular structures of axis II, blender II 18 by bolt, Jin Erke The movement of blender II 18 is driven by agitating shaft II.Channel III imports 39 are equipped between agitating shaft II and blender II 18 With the outlets channel IV 40.Further, to improve the stroke of cooling water, make blender II 18 by cooling water inlet to outlet Temperature gradient keeps stablizing, the deflector in blender II 18 between channel III imports 39 and the outlets channel IV 40（Such as Shown in Fig. 3）.

Be equipped in agitating shaft II positioned at middle part and 16 phases of cooling water outlet II together with channel III 37, channel III 37 peripheries are equipped with the channel IV, channel III 37 and channel IV that are connected with cooling water inlet II respectively with blender II's 18 Hollow structure is connected, and is formed between cooling water inlet II 15, channel III 37, channel IV and cooling water outlet II 16 cold But water recycles.

To increase heat transfer efficiency, similar cooling-water duct is equipped in blender II.Specifically, by cooling water into Mouth II is vertically arranged with agitating shaft, and cooling water is made to enter along the tangential direction of circular passage IV.Rotation is formed in the IV of circular passage Stream finally enters blender in the circular passage ends IV under the action of eddy flow along the outlets channel IV perpendicular to agitating shaft II In the cavity of II, the water stream channel that guide plate of the cooling flow in cavity is formed enters from channel III imports positioned at the logical of middle part Road III is finally discharged from cooling water outlet II with minimum resistance under the effect of gravity.

Pipeline is connected although also disclosing that cooling water is arranged in blender in the prior art, does not disclose tool therein Body structure.Therefore, even if those skilled in the art have no way of knowing how to carry out existing blender if obtaining above-mentioned technological document It improves to obtain stable, leakproofness well while there is the blender of cooling effect.

Before use, needing in each cooling-water duct（Predominantly helical duct）It is passed through and is higher than actual production water pressure of cooling water The high pressure water flow of certain numerical value avoids going wrong in actual production to test the leakproofness and resistance to pressure of helical duct.

Under the premise of ensureing heat-transfer effect, using the excellent composite plate of processing effect, such as Q345R+S31603 meets NB/T47002.1~4-2009《Pressure vessel Explosive Welding Composite Plates》Standard.The ratio of height to diameter of autoclave body is preferably 1.22：1, envelope Head is that ratio of long axis to short axis is 2：1 standard oval, autoclave body total measurement (volume) are 70m³.To coordinate 70m³Autoclave body volume, blender I Helical blade diameter preferably 1600 ~ 1950mm, screw pitch preferably 1700 ~ 2125mm.LPJ-280 can be used in speed reducer I, preferably exists LPJ-280 can be used in 18 ~ 26rpm frequency controls, speed reducer II, preferably in 10 ~ 15rpm frequency controls.

Claims (5)

1. a kind of substance law vinyl chloride agitating device, including driving motor, agitating shaft, blender, agitating shaft and blender are Hollow structure, it is characterised in that：Stirrer bottom is closed, and cooling water inlet and cooling water outlet, stirring are equipped at the top of agitating shaft It is equipped with the channel I being connected with cooling water outlet positioned at middle part in axis, the channel peripheries I are equipped with to be connected with cooling water inlet Channel II forms cooling water circulation between cooling water inlet, channel II, channel I and cooling water outlet.

2. substance law vinyl chloride agitating device according to claim 1, it is characterised in that：Channel I and channel II difference It is connected with the hollow structure of blender.

3. substance law vinyl chloride agitating device according to claim 2, it is characterised in that：Back taper is equipped in agitating shaft Structure.

4. substance law vinyl chloride agitating device according to claim 1 or 2 or 3, it is characterised in that：Blender is spiral Blender, helical blade is interior to be equipped with helical duct, and flow-guiding mouth, helical duct top are respectively equipped at the top and bottom of helical duct Flow-guiding mouth be connected with channel II, the flow-guiding mouth of helical duct bottom is connected with channel I.

5. substance law vinyl chloride agitating device according to claim 2, it is characterised in that：Helical blade is by a pair of opposite The arc panel being fixed on agitating shaft outer wall being arranged is constituted, and middle partition board and support column are equipped between arc panel.