CN109367039B - On-spot preprocessing device of mixing glass bead in polyether polyol - Google Patents
On-spot preprocessing device of mixing glass bead in polyether polyol Download PDFInfo
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- CN109367039B CN109367039B CN201811146960.3A CN201811146960A CN109367039B CN 109367039 B CN109367039 B CN 109367039B CN 201811146960 A CN201811146960 A CN 201811146960A CN 109367039 B CN109367039 B CN 109367039B
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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
- B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
- B29C67/24—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00 characterised by the choice of material
- B29C67/246—Moulding high reactive monomers or prepolymers, e.g. by reaction injection moulding [RIM], liquid injection moulding [LIM]
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B13/00—Conditioning or physical treatment of the material to be shaped
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
- B29B7/34—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
- B29B7/38—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary
- B29B7/46—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft
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- Mechanical Engineering (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Mixers Of The Rotary Stirring Type (AREA)
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Abstract
The invention discloses an on-site pretreatment device for mixing glass beads in polyether polyol. It comprises a receiving tank unit for extracting polyether polyol; a metering tank unit for withdrawing polyether polyol from the receiving tank unit; a metering powder bin unit for extracting and weighing the hollow glass microspheres; a screw mixer unit for extracting polyether polyol from the receiving tank unit and mixing the polyether polyol with hollow glass microspheres delivered from the metering powder bin unit; a stirring and mixing tank unit for extracting the mixture of the polyether polyol and the hollow glass beads from the screw mixer unit; a degassing tank unit which extracts the mixture of the polyether polyol and the hollow glass beads from the stirring and mixing tank unit and has a vacuum degassing treatment function and a temperature control function; and a general control console for controlling the above units. The pretreated polyether polyol mixed glass beads are immediately fed into a casting machine to be subjected to casting reaction with isocyanate, so that a high-quality composite polyurethane elastomer product can be obtained.
Description
Technical Field
The invention relates to an on-site pretreatment device for mixing glass beads in polyether polyol.
Background
Polyether polyol (polyether for short) is prepared by the polyaddition reaction of an initiator (compound containing active hydrogen groups) and Ethylene Oxide (EO), Propylene Oxide (PO), Butylene Oxide (BO) and the like in the presence of a catalyst. Polyether polyols react with isocyanates to form polyurethanes.
The composite polyurethane elastomer is prepared by reacting polyether polyol with hollow glass beads and isocyanate. The composite polyurethane elastomer has high compressive strength, good heat preservation performance, flame retardance and sound insulation performance.
The polyether polyol raw material mixed with the hollow glass beads is conveyed to a production workshop in a barrel packaging mode, the polyether polyol raw material mixed with the hollow glass beads can be layered after being placed for 4 hours, and can be reacted with isocyanate after being stirred and mixed again to generate the composite polyurethane elastomer after reaction. In the process of remixing, the polyether polyol raw material mixed with the hollow glass beads is polluted, the water content of the polyether polyol raw material is increased, and special equipment is required for re-dehydrating the polyether polyol raw material of the hollow glass beads. The process of reprocessing the polyether polyol raw material mixed with the hollow glass beads increases the production cost and production time of the composite polyurethane elastomer, and simultaneously reduces the quality of the product.
Disclosure of Invention
The invention aims to provide a field pretreatment device for mixing glass beads in polyether polyol.
The invention provides an on-site pretreatment device for mixing glass beads in polyether polyol, which comprises a receiving tank unit for extracting the polyether polyol;
a metering powder bin unit for extracting and weighing the hollow glass microspheres;
a metering tank unit for withdrawing polyether polyol from said receiving tank unit;
a screw mixer unit for extracting polyether polyol from the receiving tank unit and mixing the polyether polyol with hollow glass microspheres delivered from the metering powder bin unit;
a stirring and mixing tank unit for extracting the mixture of the polyether polyol and the hollow glass beads from the screw mixer unit;
and the degassing tank unit is used for extracting the mixture of the polyether polyol and the hollow glass beads from the stirring and mixing tank unit and has a vacuum degassing treatment function and a temperature control function.
And a general control console for controlling the above units.
In the device, the screw mixer unit mixes the polyether polyol sent out by the metering tank unit with the hollow glass microspheres sent out by the metering powder bin unit according to a required proportion; wherein the hollow glass microspheres sent out by the metering powder bin unit account for no more than 40%.
In the device, the metering powder bin unit is driven by a vacuum pump to pump the hollow glass microspheres;
the screw mixer unit is driven by a variable-frequency speed-regulating gear pump;
the screw mixer unit is driven by a variable-frequency speed-regulating gear pump to extract polyether polyol;
the stirring and mixing tank unit is driven by a variable-frequency speed-regulating rotor pump to pump a mixture of polyether polyol and hollow glass beads;
in the device, the metering powder bin unit is driven by a vacuum pump to pump the hollow glass microspheres;
and the degassing tank unit is used for pumping the mixture of polyether polyol and hollow glass beads from the stirring and mixing tank by a variable-frequency speed-regulating rotor pump.
In the device, the receiving tank unit comprises a receiving tank body, a double-screw pump, a one-way valve, a filter, a valve, a receiving tank control cabinet, a mold temperature controller and a nitrogen filling pipeline; the receiving tank body is provided with an inlet and an outlet, and the inlet of the receiving tank body is connected with the double-screw pump; the outlet of the receiving tank body is connected with the filter, and the outlet of the filter is connected with a double-screw pump at the outlet of the receiving tank; a one-way valve, a valve and a nitrogen filling pipeline;
the metering powder bin unit comprises a stainless steel powder bin body, a vacuum pump, a powder collecting device, a powder stirring paddle, a motor reducer driving device, a weighing and metering device, a variable-frequency speed-regulating vacuum discharging rotary valve, a double-screw powder conveyor, a pneumatic control powder discharging stop valve, a discharging opening flexible connecting pipe, a gas pulse powder vibrator and a conveying pipeline;
the screw mixer unit comprises a screw extruder, a feeding hole, a filter, a flexible connecting pipe and a buffer tank for receiving the mixture of the polyether polyol and the hollow glass beads output by the screw mixer unit; the buffer tank comprises a buffer tank body, a double-helix belt stirrer, a manual stop valve and a conveying pipeline;
the stirring and mixing tank unit comprises a stirring and mixing tank body, a spiral stirrer, a static mixer, a nitrogen-filled pipeline and a conveying pipeline.
In the device, the metering tank unit comprises a metering tank body, a double-screw pump, a variable-frequency speed-regulating gear pump, a valve, a pipeline, a weighing unit, a vacuum pump, a vacuum buffer tank, a mold temperature controller, a nitrogen-filled pipeline and a conveying pipeline;
the degassing tank unit comprises a degassing tank body, a vacuum degassing device, a variable-frequency speed-regulating rotor pump, a circulation control valve, a nitrogen filling pipeline and a conveying pipeline.
In the above device, the receiving tank body is a water-through temperature-control jacket type stainless steel tube tank; the receiving tank has the functions of vacuum material sucking, stirring and medium protection by filling nitrogen, so as to play a role in receiving and storing polyether polyol, controlling temperature and stirring raw materials and feeding materials;
the metering tank body is a water-through temperature-control jacket type stainless steel tank; the metering tank has the functions of vacuum material suction and stirring, weighing and metering the quality of the polyether polyol, and filling nitrogen to protect a medium, so as to play roles in storing the polyether polyol, weighing, metering and monitoring the polyether polyol, and controlling and monitoring the blanking flow of the polyether polyol;
the stirring and mixing tank body is provided with a double-helix stirrer and has the functions of water-flowing temperature control of an outer jacket, metering and weighing, density detection and mixture conveying by a rotor pump.
In the invention, the metering powder bin has the functions of vacuum conveying and feeding glass beads, dust removing, weighing and metering glass beads, variable-frequency speed-regulating vacuum rotary valve discharging glass beads and variable-frequency speed-regulating double-screw powder discharging and conveying.
In the invention, the degassing tank is provided with a vacuum degassing device for mixed liquid of polyether polyol and glass beads, and has the functions of rapid circulating vacuum pumping, powder-liquid stirring, mixed liquid temperature control, density detection and mixed liquid output.
The invention has the following advantages:
1. the temperature is controlled in the whole process of mixing the polyether polyol and the glass beads, the temperature of the polyether polyol and the glass beads entering a casting machine after pretreatment can be controlled, and the temperature control precision can reach +/-2 ℃;
2. nitrogen is filled in the whole mixing process of the polyether polyol and the glass beads, and the water content of the mixed liquid of the polyether polyol and the glass beads after pretreatment is low;
3. the polyether polyol and the glass beads can be pretreated rapidly in large batch, and the pretreatment efficiency can reach 4000 liters/hour;
4. the breakage rate of the glass beads pretreated by polyether polyol and the glass beads is low;
5. the mixture of polyether polyol and glass beads is subjected to vacuum pretreatment, and the quality of a product obtained after pouring reaction of the mixed solution of polyether polyol and glass beads subjected to vacuum pretreatment and isocyanate can meet the quality requirement of the heat-insulating coating of the deep-water submarine pipeline.
Drawings
FIG. 1 is a receiving tank unit floor plan;
FIG. 2 is a plan view of a metering tank unit;
FIG. 3 is a schematic view of a metering hopper and screw mixer;
FIG. 4 is a plan view of a screw mixer unit;
FIG. 5 is a plan view of a blender mixing tank unit;
FIG. 6 is a degasser tank unit floor plan;
in the drawings: 1-polyether polyol raw material suction pipe, 2-variable frequency screw pump, 3-receiving tank unit bracket, 4-receiving tank body, 5-receiving tank outlet filter, 6-receiving tank outlet variable frequency screw pump, 7-receiving tank outlet pipe, 8-receiving tank control cabinet, 9-mold temperature controller, 10-vacuum buffer tank, 11-vacuum pump, 12-vacuum pump, 13-vacuum buffer tank, 14-mold temperature controller, 15-metering tank unit power cabinet, 16-flowmeter, 17-metering tank outlet pipe, 18-variable frequency speed regulation gear pump, 19-metering tank weighing sensor component, 20-metering tank body, 21-metering tank bracket, 22-powder bin, 23-powder inlet, 24-spiral mixing equipment, 25-buffer tank, 25-vacuum pump, 26-vacuum powder conveying station, 27-master control console, 28-exhaust and overflow pipeline, 29-spiral mixer outlet, 30-buffer tank outlet, 31-rotor pump, 32-discharge pipeline, 33-stirring mixing tank bracket, 34-weighing sensor group, 35-variable frequency rotor pump, 36-mixed liquid outlet pipe, 37-stirring mixing unit electric control cabinet, 38-mold temperature machine, 39-vacuum buffer tank, 40-stirring mixing tank body, 41-vacuum pump, 42-degassing tank unit bracket, 43-vacuum pump, 44-weighing sensor, 45-degassing tank body, 46-vacuum buffer tank, 47-mold temperature machine, 48-degassing tank unit control cabinet, 49-mixed material circulation pipeline, 50-mixed material outlet, 51-manual detection sampling port, 52-mass flow densimeter and 53-rotor pump.
101-temperature control system interface, 102-spiral mixer body, 103-exhaust and overflow port, 104-screw mixer coupling, 105-screw mixer liquid and powder inlet, 106-screw mixer drive reduction box and 107-drive motor.
201-a pneumatic stop valve, 202-an air blast valve, 203-a stirring motor and a speed reducer, 204-a dust remover, 205-a powder bin, 206-a weighing sensor group, 207-an electric valve for powder blanking and 208-a screw feeder.
Detailed Description
The experimental procedures used in the following examples are all conventional procedures unless otherwise specified.
Materials, reagents and the like used in the following examples are commercially available unless otherwise specified.
The invention is described in detail below with reference to the figures and examples. The scope of protection of the invention is not limited to the embodiments described.
As shown in fig. 1, fig. 2, fig. 3, fig. 4 and fig. 5, the on-site pretreatment device for mixing glass beads in polyether polyol comprises a receiving tank unit, a metering powder bin unit, a screw mixer unit, a buffer tank unit, a stirring and mixing tank unit, a vacuum degassing tank unit and a general electric control unit.
Specifically, the receiver tank unit is composed of the following parts: the device comprises a polyether polyol raw material suction pipe 1, a twin-screw pump (or variable-frequency twin-screw) 2, a receiving tank unit bracket 3, a receiving tank body 4, a receiving tank outlet filter 5, a receiving tank outlet twin-screw pump (or variable-frequency twin-screw) 6, a receiving tank outlet pipe 7, a receiving tank control cabinet 8, a mold temperature controller 9, a nitrogen filling pipeline, a control valve and the like.
The function of the receiving tank unit is: receiving and storing polyether polyol, controlling temperature and stirring raw materials, and feeding.
The receiving tank body 4 has the volume of 3000 liters, and the receiving tank body 4 is provided with an outer jacket and can be heated by circulating heating water to control the temperature; the receiving tank body 4 is provided with a double-layer impeller stirring device, and the stirring speed is 60 rpm; the receiving tank body 4 is provided with a vacuumizing interface and an automatic control valve. The receiving tank control cabinet 8 controls the power consumption of the receiving tank unit.
The function of the receiving tank unit is realized by the following specific modes: 1500kg of a barreled polyether polyol stock was received each time. The receiving tank is provided with two pumping modes from 200L barreled polyether polyol, wherein one mode is pumping, the other mode is vacuum pumping, and one mode is adopted in actual work. The pumping mode adopts the following scheme: a double-screw pump 2 of the receiving tank unit is inserted into the bottom of the barreling barrel from a polyether polyol raw material suction pipe 1 to suck and discharge polyether polyol raw materials into a receiving tank 4, a metering weigher is installed on a bottom frame 3 of the receiving tank, and the double-screw pump 2 stops sucking materials after the receiving tank 4 is filled with polyether polyol; and then the twin-screw pump 6 is started, and the polyether polyol raw material is filtered by the filter 5 and then discharged into the polyether polyol metering tank through the twin-screw pump 6. The vacuum pumping mode is as follows: the polyether polyol raw material suction pipe 1 is inserted into the bottom of the barreled material barrel, a vacuum pump 11 is started, a control valve of a vacuum buffer tank 10 is opened to enable a receiving tank to generate vacuum, and polyether polyol raw materials are sucked into the receiving tank under the action of the vacuum in the receiving tank. After the raw materials in the receiving tank reach the preset liquid level value, the vacuum pump automatically stops working, and the vacuum system automatically opens the control valve to fill nitrogen to the positive pressure of 0.01-0.02 MPa.
After the temperature of the polyether polyol liquid raw material in the receiving tank body 4 reaches the control temperature, the polyether polyol liquid raw material is conveyed into the metering tank body 20 from the receiving tank outlet pipe 7 after being filtered by the receiving tank outlet filter 5 by starting the receiving tank outlet double-screw pump 6.
The mold temperature controller 9 is connected with the receiving tank body 4 with an outer jacket through a pipeline and is filled with water, the working temperature of the mold temperature controller 9 is set, the temperature of polyether polyol liquid in the receiving tank body 4 can be controlled, and temperature signals of the polyether polyol liquid are detected and simultaneously transmitted to the master control console 27 and displayed on an operation screen; the temperature of the mold temperature controller 9 is controlled to be 25-40 ℃.
The metering tank unit consists of the following parts: the device comprises a vacuum pump 12, a vacuum buffer tank 13, a mold temperature controller 14, a metering tank unit power cabinet 15, a flowmeter 16, a metering tank outlet pipe 17, a variable-frequency speed-regulating gear pump 18, a metering tank weighing sensor assembly 19, a metering tank body 20, a metering tank bracket 21, pipelines, control valves and the like.
The function of the metering tank unit is: polyether polyol storage, polyether polyol weighing, metering and monitoring, and polyether polyol blanking flow control and monitoring.
The function of the metering tank unit is realized by the following specific modes: the volume of the metering tank body 20 is 3000 liters, the metering tank body 20 is provided with an outer jacket, and the mold temperature controller 14 provides circulating heating water for heating and temperature control; the metering tank body 20 is provided with a double-layer impeller stirring device, and the stirring speed is 60-200 rpm; the metering tank body 20 is provided with a vacuumizing interface and an automatic control valve; the metering tank unit power cabinet 15 controls the metering tank unit power cabinet 15 to use electricity; the flow meter 16 meters the flow of the polyether polyol outlet pipe 17; the variable-frequency speed-regulating gear pump 18 regulates and controls the liquid flow of the polyether polyol input screw mixer; the metering tank weighing sensor assembly 19 monitors the blanking speed of polyether polyol in real time; the amount of polyether polyol processed by each batch of the metering tank unit is 1000kg-1500 kg. The temperature, the pressure in the tank, the stirring speed, the gear pump flow and other parameter signals of the metering tank unit are sent to a master control console and displayed on an operation screen in real time.
The metering powder bin unit consists of the following parts: the device comprises a powder station 26, a pneumatic stop valve 201, an air blast valve 202, a stirring motor and speed reducer 203, a dust remover 204, a powder bin (stainless steel powder bin body) 205, a weighing sensor group 206, a powder blanking electric valve 207, a screw feeder 208, a pipeline, a control valve and the like.
The function of the metering powder bin is as follows: powder storage, powder weighing, metering and monitoring, and powder discharging flow control and monitoring.
The function of the metering powder bin unit is realized by the following specific modes: the powder station 26 sucks the glass bead powder from the powder packaging bag in vacuum and conveys the glass bead powder to a powder bin 205 in a closed manner through a pipeline, and a dust remover 204 absorbs glass dust generated by powder blanking; the feeding speed of the glass bead powder in the powder station 26 is 800 kg/h; the powder of the powder bin 205 is fed into the liquid and powder inlet 105 of the screw mixer by opening the pneumatic stop valve 201, starting the screw feeder 208 and the powder discharging electric valve 207; the air blast valve 202, the stirring motor and the speed reducer 203 break the arch of the powder in the bin in the powder blanking process so as to realize uniform powder blanking; the powder blanking electric valve 207 controls the powder blanking speed by regulating the speed of the variable frequency motor, and the weighing sensor group 206 monitors the powder blanking speed in real time in the powder blanking process; the powder amount of each batch of the metering powder bin unit ranges from 300kg to 600 kg.
The screw mixer unit consists of the following parts: the screw mixer comprises a screw mixer outlet 28, a temperature control system interface 101, a screw mixer body 102, an exhaust and overflow port 103, a screw mixer coupling 104, a screw mixer liquid and powder inlet 105, a screw mixer drive reduction box 106 and a drive motor 107.
The function of the screw mixer unit is: mixing powder and liquid, controlling the temperature of the mixed liquid and exhausting gas.
The function of the screw mixer unit is achieved in the following specific manner: receiving liquid polyether polyol sent out by a variable frequency speed regulating gear pump 18 of a metering tank unit and glass bead powder sent out by a screw feeder 208 of a metering powder bin unit through a screw mixer liquid and powder inlet 105; mixing the liquid polyether polyol delivered by the variable-frequency speed-regulating gear pump 18 and the glass bead powder delivered by the screw feeder 208 by the screw mixer body 102; the rotation speed of the screw mixer body 102 is adjusted by a variable-frequency speed-regulating driving motor 107, so that liquid and powder entering the screw mixer and the powder inlet 105 all enter the screw mixer body 102 and are smoothly discharged from the screw mixer outlet 28, and the exhaust and overflow outlet 103 is connected with the top of the screw mixer body 25 through a pipeline; the buffer tank 25 receives the mixed liquid discharged from the screw mixer outlet 28 and the mixed liquid overflowing from the exhaust and overflow port 103; the variable frequency rotor pump 31 pumps the mixed liquid in the buffer tank 25 and enters the stirring and mixing tank body 40 through the discharge pipeline 32; the raw material amount of polyether polyol processed by the screw mixer unit in each batch is 1000kg-1200kg, after the polyether polyol in the metering tank 20 and the metering powder bin 205 are mixed according to the preset proportion by the screw mixer unit, the driving motor 107 stops working, the pneumatic stop valve 201 is closed, the powder blanking electric valve 207 is closed, and the screw feeder 208 stops working; after that the metering tank unit and the metering powder bin unit enter the loading working procedure of the next mixing processing batch.
The interface 101 of the temperature control system is filled with temperature-controlled water to control the temperature of the mixture in the powder-liquid mixing process.
The stirring and mixing tank unit consists of the following parts: the system comprises a stirring and mixing tank bracket 33, a weighing sensor group 34, a variable frequency rotor pump 35, a mixed liquid outlet pipe 36, a stirring and mixing unit electric control cabinet 37, a mold temperature controller 38, a vacuum buffer tank 39, a stirring and mixing tank body 40, a vacuum pump 41, pipelines, accessories and the like.
The function of the agitating mixing tank unit is: stirring, weighing, controlling the temperature of the mixed solution, vacuumizing the mixed solution once, and receiving and discharging the mixed solution.
The function of the stirring and mixing tank unit is realized by the following specific modes:
the volume of the stirring and mixing tank body 40 is 3000 liters; the agitation and mixing tank body 40 receives the mixed liquid from the discharge line 32 in each batch, and the treatment amount of each batch of the agitation and mixing tank unit is 2000 liters to 2400 liters. The stirring and mixing tank body 40 is provided with an overhead low-speed double-helix stirrer and has the secondary mixing and stirring function of the mixed liquid of the powder and the liquid; the mold temperature controller 38 is connected with the stirring mixing tank body 40 with an outer jacket through a pipeline and is filled with water, the working temperature of the mold temperature controller 38 is set to control the temperature of the mixed liquid in the stirring mixing tank body 40, and the temperature signal of the mixed liquid is simultaneously transmitted to the master control console 27 and displayed on the operation screen.
The spiral stirrer of the stirring and mixing tank body 40 works together with a system consisting of a vacuum pump 41, a vacuum buffer tank 39 and an auxiliary vacuum pipeline to realize primary vacuum pretreatment of the mixture;
the degassing tank unit consists of the following parts: degassing tank unit bracket 42, vacuum pump 43, weighing sensor 44, degassing tank body 45, vacuum buffer tank 46, mold temperature controller 47, degassing tank unit control cabinet 48, mixture circulation pipeline 49, mixture outlet 50, manual detection sampling port 51, mass flow densimeter 52, variable-frequency speed-regulating rotor pump 53, pipeline, circulation control valve and accessories. The degassing tank body 45 includes a tank and a vacuum degassing apparatus.
The degassing tank unit functions as: storing and outputting the mixture; discharging the gas in the mixture in a vacuumizing mode again, namely vacuumizing for the second time; controlling the temperature of the mixture; detecting and monitoring the weight of the mixture in the tank; the density of the output mix is detected and monitored.
The function of the degassing tank unit is realized by the following specific modes:
the volume of the degassing tank body 45 is 3000 liters; the degassing tank body 45 receives the mixed liquid from the discharge line 32 on a batch-by-batch basis; the mixture circulating pipeline 49, the rotor pump 53, the degassing tank body 45 and the auxiliary pipelines form a mixture circulating loop, the vacuum pump 43 and the vacuum buffer tank 46 are connected with an interface above the degassing tank body 45 to form a vacuumized closed space, a degassing umbrella is arranged at the outlet of the mixture circulating pipeline 49, the mixture passes through the degassing umbrella to form a liquid film, and gas contained in the liquid film is broken and foamed under the vacuum action and then is pumped out by the vacuum pump.
The mold temperature controller 47 is connected to the degassing tank body 45 with an outer jacket by a pipeline and filled with water, the temperature of the mixture in the degassing tank body 45 can be controlled by setting the working temperature of the mold temperature controller 47, and the temperature signal of the mixture is simultaneously transmitted to the master control console 27 and displayed on the operation screen.
The density detection of the mixture is carried out in two ways: firstly, the sampling is carried out through a manual detection sampling port 51 for detection and calibration, and secondly, the online monitoring and detection are carried out through a mass flow densimeter 52 connected with the outlet of the rotor pump 53.
The weight of the mixture in the tank is output to the general control console 27 through the weighing sensor 44 and displayed on the operation screen of the general control console 27.
Claims (4)
1. The utility model provides an on-spot preprocessing device of mixing glass bead in polyether polyol which characterized in that: it comprises a receiving tank unit for extracting polyether polyol;
a metering tank unit for withdrawing polyether polyol from said receiving tank unit;
a metering powder bin unit for extracting and weighing the hollow glass microspheres;
a screw mixer unit for extracting polyether polyol from the receiving tank unit and mixing the polyether polyol with hollow glass microspheres delivered from the metering powder bin unit;
a stirring and mixing tank unit for extracting the mixture of the polyether polyol and the hollow glass beads from the screw mixer unit;
a degassing tank unit which extracts the mixture of the polyether polyol and the hollow glass beads from the stirring and mixing tank unit and has a vacuum degassing treatment function and a temperature control function;
and a main console for controlling the above units;
the receiving tank unit comprises a receiving tank body, a double-screw pump, a one-way valve, a filter, a valve, a receiving tank control cabinet, a mold temperature controller and a nitrogen filling pipeline; the receiving tank body is provided with an inlet and an outlet, and the inlet of the receiving tank body is connected with the double-screw pump; the outlet of the receiving tank body is connected with the filter, and the outlet of the filter is connected with a double-screw pump at the outlet of the receiving tank; a one-way valve, a valve and a nitrogen filling pipeline;
the metering powder bin unit comprises a stainless steel powder bin body, a vacuum pump, a powder collecting device, a powder stirring paddle, a motor reducer driving device, a weighing and metering device, a variable-frequency speed-regulating vacuum discharging rotary valve, a double-screw powder conveyor, a pneumatic control powder discharging stop valve, a discharging opening flexible connecting pipe, a gas pulse powder vibrator and a conveying pipeline;
the screw mixer unit comprises a screw extruder, a feeding hole, a filter, a flexible connecting pipe and a buffer tank for receiving the mixture of the polyether polyol and the hollow glass beads output by the screw mixer unit; the buffer tank is provided with a spiral stirrer, a rotor pump, a mixed liquid inlet and a mixed liquid inlet conveying pipeline;
the stirring and mixing tank unit comprises a stirring and mixing tank body, a spiral stirrer, a static mixer, a nitrogen-filled pipeline and a conveying pipeline;
the measuring tank unit comprises a measuring tank body, a double-screw pump, a variable-frequency speed-regulating gear pump, a valve, a pipeline, a weighing unit, a vacuum pump, a vacuum buffer tank, a mold temperature controller, a nitrogen-filled pipeline and a conveying pipeline;
the degassing tank unit comprises a degassing tank body, a vacuum degassing device, a variable-frequency speed-regulating rotor pump, a circulation control valve, a nitrogen filling pipeline and a conveying pipeline;
the receiving tank body is a water-through temperature-control jacket type stainless steel tank;
the metering tank body is a water-through temperature-control jacket type stainless steel tank;
the stirring and mixing tank body is provided with a double-helix stirrer and has the functions of water-flowing temperature control of an outer jacket, metering and weighing, density detection and mixture conveying by a rotor pump.
2. The apparatus of claim 1, wherein: and the screw mixer unit mixes the polyether polyol sent out by the metering tank unit with the hollow glass microspheres sent out by the metering powder bin unit according to a required proportion.
3. The apparatus of claim 1 or 2, wherein: the metering powder bin unit is driven by a vacuum pump to extract hollow glass microspheres;
the screw mixer unit is driven by a variable-frequency speed-regulating gear pump;
the screw mixer unit is driven by a variable-frequency speed-regulating gear pump to extract polyether polyol;
and the stirring and mixing tank unit is driven by a variable-frequency speed-regulating rotor pump to pump the mixture of the polyether polyol and the hollow glass beads.
4. The apparatus of claim 1 or 2, wherein: the metering powder bin unit is driven by a vacuum pump to extract hollow glass microspheres;
and the degassing tank unit is used for pumping the mixture of polyether polyol and hollow glass beads from the stirring and mixing tank by a variable-frequency speed-regulating rotor pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811146960.3A CN109367039B (en) | 2018-09-29 | 2018-09-29 | On-spot preprocessing device of mixing glass bead in polyether polyol |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811146960.3A CN109367039B (en) | 2018-09-29 | 2018-09-29 | On-spot preprocessing device of mixing glass bead in polyether polyol |
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| CN109367039A CN109367039A (en) | 2019-02-22 |
| CN109367039B true CN109367039B (en) | 2020-10-16 |
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| CN109367039A (en) | 2019-02-22 |
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