CN202016188U - Double-screw extruder unit for reaction extrusion of polyvinyl alcohol (PVA) - Google Patents

Double-screw extruder unit for reaction extrusion of polyvinyl alcohol (PVA) Download PDF

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Publication number
CN202016188U
CN202016188U CN2010206540551U CN201020654055U CN202016188U CN 202016188 U CN202016188 U CN 202016188U CN 2010206540551 U CN2010206540551 U CN 2010206540551U CN 201020654055 U CN201020654055 U CN 201020654055U CN 202016188 U CN202016188 U CN 202016188U
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CN
China
Prior art keywords
screw extruder
pva
joint
double
cylindrical shell
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN2010206540551U
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Chinese (zh)
Inventor
贾朝阳
娄晓鸣
尹伟
杜丽梅
马永寿
梁晓刚
杨魁
李侠
俞长庚
贾海峰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
APPLIED TECHNOLOGY RESEARCH INSTITUTE OF YUNNAN COAL CHEMICAL INDUSTRY
Tianhua Institute of Chemical Machinery and Automation Co Ltd
Original Assignee
APPLIED TECHNOLOGY RESEARCH INSTITUTE OF YUNNAN COAL CHEMICAL INDUSTRY
Tianhua Institute of Chemical Machinery and Automation Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by APPLIED TECHNOLOGY RESEARCH INSTITUTE OF YUNNAN COAL CHEMICAL INDUSTRY, Tianhua Institute of Chemical Machinery and Automation Co Ltd filed Critical APPLIED TECHNOLOGY RESEARCH INSTITUTE OF YUNNAN COAL CHEMICAL INDUSTRY
Priority to CN2010206540551U priority Critical patent/CN202016188U/en
Application granted granted Critical
Publication of CN202016188U publication Critical patent/CN202016188U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
    • B29C48/875—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling for achieving a non-uniform temperature distribution, e.g. using barrels having both cooling and heating zones
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
    • B29C48/40—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
    • B29C48/405—Intermeshing co-rotating screws
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/92—Measuring, controlling or regulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/92704—Temperature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92819—Location or phase of control
    • B29C2948/92857—Extrusion unit
    • B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
    • B29C2948/92895—Barrel or housing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/365—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using pumps, e.g. piston pumps

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

The utility model relates to a double-screw extruder unit for the reaction extrusion of polyvinyl alcohol (PVA for short). The double-screw extruder unit comprises a main motor, a coupling, a transmission box, a middle body, a barrel, screws, a vacuum exhaust system, a liquid adding system, a mold temperature controller and a frame, wherein the screws are arranged in the barrel and are driven by the main motor, the coupling and the transmission box which are arranged on the frame; a storage tank is connected with a constant temperature premixing reactor through a diaphragm metering pump and a three-way valve in a pipeline, and is communicated with the barrel; the mold temperature controller controls the temperature of a double-screw extruder; polyvinyl acetate (PVAc) methanol solution and NaOH methanol solution in a certain ratio are continuously injected into different barrels of the double-screw reaction extruder by the liquid adding system to complete the alcoholysis reaction of PVA with a low alcoholysis degree, and the product is extruded by a head; meanwhile, the vacuum exhaust system exhausts volatile matters and water vapor which are generated in the reaction process. The double-screw extruder unit well solves the problem that the PVA with the low alcoholysis degree cannot be produced by the conventional method, is quick and high-efficiency, and has an obvious energy-saving effect.

Description

The double screw extruder group that a kind of PVA of being used for reaction is extruded
Technical field
The utility model relates to macromolecular material and polymer reaction extruding technology field, specifically is meant the double screw extruder group that a kind of PVA of being used for reaction is extruded.
Background technology
Polyvinyl alcohol (being called for short PVA) is a kind of important high molecular synthetic material, and its performance is one of industrial synthetic water soluble polymer of minority of having found at present between rubber and plastics.
It is very extensive that polyvinyl alcohol is used, main application be divided into fiber with and non-fiber with two big classes.Fiber is with being mainly used in manufacture fiber, cord fabric thread, filter cloth, fishing net etc.; Non-fiber is with being mainly used in chemical ﹠ blended fabric slurry, coating, adhesive, emulsifying agent, papermaking processing aid, food product packing film, oil drilling coagulating agent, soil conditioner etc.In addition, polyvinyl alcohol and aldehyde material polycondensation can make polyvinyl acetal resin, can be used for making the sandwich material of aviation and automotive safety glass, and safety transparent is good, the impact strength height.PVA begins to realize suitability for industrialized production in nineteen fifty, and according to statistics, the whole world has more than 20 countries and regions and produces PVA at present, and a year process units total capacity reaches 1,100,000 tons, and output is about 930,000 tons.
The PVA of China production starts from the sixties in last century, main purpose at that time is to produce vinylon, but over nearly more than 20 years, synthetic fiber industry has obtained significant progress, vinylon fiber is being owing to exist serious defective aspect hot water resistance, elasticity and the dyeability, thereby withdraws from application gradually.The non-fiber applications of exploring PVA actively becomes the unique channel of PVA manufacturing enterprise, but domestic PVA manufacturer does not carry out the revolutionary character reform to apparatus and process in decades, product is based on PVA-1799 and PVA-2499, mostly be the fiber polyvinyl alcohol, the identical degree of product is big, the high added value PVA product that lacks the functionalization and the special trade mark, the PVA product applications is narrower, can't satisfy the demand of present domestic market, particularly high alkaline process PVA production technology is about to face the situation that is eliminated in the world.Therefore, imperative to the transformation of existing equipment.
Summary of the invention
In view of above-mentioned, the purpose of this utility model is to overcome the shortcoming of above-mentioned prior art, the double screw extruder group that provides a kind of PVA of being used for reaction to extrude, this unit utilizes parallel dual-screw extruding machine as reactor, give full play to the advantage of double screw extruder, adopt low alkaline process to prepare low alcoholysis level PVA, solved prior art well and can't produce low alcoholysis level PVA product, fast, efficient and energy-saving effect is obvious.
The purpose of this utility model is to realize by following technical proposals:
The double screw extruder group is extruded in a kind of PVA of being used for reaction, comprises main motor, shaft coupling, transmission case, middle body, screw rod, cylindrical shell, frame, vacuum pumping system, liquid adding system, first die heater, second die heater, the 3rd die heater; Screw rod is installed in the cylindrical shell, drive by rack-mounted main motor, shaft coupling, transmission case, storage tank is connected with constant temperature premix reactor by ducted diaphragm metering pump, measuring pump, triple valve, and be communicated with: double screw extruder draw ratio L/D=48 with cylindrical shell, it is made up of 12 joint cylindrical shells, wherein liquid adding system is arranged at cylindrical shell first segment and the 3rd joint, five, six, seven, eight, ten joint cylindrical shells are for reserving exhaust outlet or sample tap, blocked by blind material blocking block, vacuum pumping system is arranged at cylindrical shell the 9th joint and the 11 joint.
Above-mentioned first die heater control, the first～four joint barrel temperature, second die heater is controlled the five～eight joint cylindrical shell, and the 3rd die heater is controlled the 9th～12 joint barrel temperature.
The advantage that the utility model compared with prior art has is:
(1) can control the reactant additional proportion preferably, for the preparation of low alcoholysis level PVA provides prerequisite;
(2) give full play to good scattered mixed performance of double screw extruder and distribution mixed performance;
(3) double screw extruder can be controlled reaction time preferably;
(4) double screw extruder can prepare the alcoholysis reaction of PVA continuously;
(5) double screw extruder is fit to the processing high-viscosity products and exists the reaction of phase transformation to extrude.
Description of drawings
Fig. 1 is a double screw extruder group structural representation in the utility model.
Fig. 2 is the vertical view of Fig. 1.
Fig. 3 is Fig. 1 liquid adding system schematic flow sheet.
The specific embodiment
Below in conjunction with embodiment and accompanying drawing, the utility model is described in further details again: but the invention is not restricted to specific embodiment.
Embodiment:
As shown in Figure 1, the double screw extruder group that a kind of PVA of being used for reaction is extruded comprises that main motor 1, shaft coupling 2, transmission case 3, middle body 4, screw rod 5, cylindrical shell 6, frame 7, vacuum pumping system 8, liquid adding system 9, the first die heater 10a, the second die heater 10b, the 3rd die heater 10c form.Middle body 4 occupy between cylindrical shell 6 and the transmission case 3, and is connected with transmission case 3 with cylindrical shell 6.By first die heater 10a control, the first～four joint barrel temperature, the second die heater 10b controls the five～eight joint cylindrical shell, and the 3rd die heater 10c controls the 9th～12 joint barrel temperature, guarantees that finally the PVA reaction extrudes required technological temperature.Twin-screw 5 is installed in the cylindrical shell 6, drive by main motor 1, shaft coupling 2, the transmission case 3 that is installed on the frame 7, PVAc methanol solution storage tank 11 is connected with constant temperature premix reactor 13 by ducted membrane pump 12, measuring pump 14, diaphragm metering pump 16, triple valve 15, NaOH methanol solution storage tank 17, and be communicated with cylindrical shell 6, liquid adding system 9 is arranged at cylindrical shell 6 first segments and the 3rd joint, vacuum pumping system is arranged at cylindrical shell 6 the 9th joint and the 11 joint, the fugitive constituent, the steam that are used for course of reaction is produced are discharged, and guarantee product quality.
The reinforced process of liquid has dual mode as shown in Figure 2:
First kind of mode: the polyvinyl acetate methanol solution in the storage tank 11 injects constant temperature premix reactor 13 by membrane pump 12 and carries out abundant preheating, enters in the double screw extruder by measuring pump 14 then; Simultaneously, the pretreated NaOH methanol solution of the process in the NaOH methanol solution storage tank 17 passes through another spout that triple valve 15 directly injects double screw extruder by diaphragm metering pump 16, reacts and extrudes.
The second way: the polyvinyl acetate methanol solution in the storage tank 11 injects constant temperature premix reactor 13 by membrane pump 12, its with fully mix by the NaOH methanol solution in diaphragm metering pump 16 and the triple valve 15, inject double screw extruder by measuring pump 14 then, react and extrude.

Claims (2)

1. one kind is used for the double screw extruder group that the PVA reaction is extruded, and comprises main motor (1), shaft coupling (2), transmission case (3), middle body (4), screw rod (5), cylindrical shell (6), frame (7), vacuum pumping system (8), liquid adding system (9) and first die heater (10a), second die heater (10b), the 3rd die heater (10c); Twin-screw (5) is installed in the cylindrical shell (6), twin-screw (5) is by being installed in the main motor (1) on the frame (7), shaft coupling (2), transmission case (3) drives, PVAc methanol solution storage tank (11) is by ducted membrane pump (12), measuring pump (14), diaphragm metering pump (16), triple valve (15), NaOH methanol solution storage tank (17) is connected with constant temperature premix reactor (13), and be communicated with cylindrical shell (6), it is characterized in that: double screw extruder draw ratio L/D=48, it is made up of 12 joint cylindrical shells, wherein liquid adding system (9) is arranged at cylindrical shell (6) first segment and the 3rd joint, the 5th, six, seven, eight, ten joint cylindrical shells are for reserving exhaust outlet or sample tap, blocked by blind material blocking block, vacuum pumping system is arranged at cylindrical shell (6) the 9th joint and the 11 joint.
2. the double screw extruder group that the PVA of being used for reaction according to claim 1 is extruded, it is characterized in that: by first die heater (10a) control, the first～four joint barrel temperature, second die heater (10b) control the five～eight joint cylindrical shell, the 3rd die heater (10c) control the 9th～12 joint barrel temperature.
CN2010206540551U 2010-12-08 2010-12-08 Double-screw extruder unit for reaction extrusion of polyvinyl alcohol (PVA) Expired - Fee Related CN202016188U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010206540551U CN202016188U (en) 2010-12-08 2010-12-08 Double-screw extruder unit for reaction extrusion of polyvinyl alcohol (PVA)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2010206540551U CN202016188U (en) 2010-12-08 2010-12-08 Double-screw extruder unit for reaction extrusion of polyvinyl alcohol (PVA)

Publications (1)

Publication Number Publication Date
CN202016188U true CN202016188U (en) 2011-10-26

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104017116A (en) * 2014-06-11 2014-09-03 天华化工机械及自动化研究设计院有限公司 Polyvinyl alcohol reaction device
CN104354283A (en) * 2014-10-17 2015-02-18 天华化工机械及自动化研究设计院有限公司 Devolatilization technology and devolatilization equipment for polyvinyl butyral methanol solution

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104017116A (en) * 2014-06-11 2014-09-03 天华化工机械及自动化研究设计院有限公司 Polyvinyl alcohol reaction device
CN104354283A (en) * 2014-10-17 2015-02-18 天华化工机械及自动化研究设计院有限公司 Devolatilization technology and devolatilization equipment for polyvinyl butyral methanol solution

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C14 Grant of patent or utility model
GR01 Patent grant
C56 Change in the name or address of the patentee

Owner name: TIANHUA INSTITUTE OF CHEMICAL MACHINERY + AUTOMATI

Free format text: FORMER NAME: TIANHUA CHEMICAL MACHINERY + AUTOMATION RESEARCH INST.

CP03 Change of name, title or address

Address after: 730060 Gansu city of Lanzhou province Xigu District Heshui Road No. 3

Patentee after: Tianhua Institute of Chemical Machinery & Automation Co., Ltd.

Patentee after: Applied Technology Research Institute of Yunnan Coal Chemical Industry

Address before: 730050 Gansu city of Lanzhou province Xigu District Heshui Road No. 3

Patentee before: Tianhua Chemical Machinery & Automation Research Inst.

Patentee before: Applied Technology Research Institute of Yunnan Coal Chemical Industry

CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20111026

Termination date: 20151208

EXPY Termination of patent right or utility model