Special resin pilot plant

Abstract

The utility model provides a pilot plant for special resin, which comprises a feeding tank, a first jacket arranged outside the feeding tank, a heat conduction oil machine connected with the first jacket, a polymerization reaction kettle connected with the lower end of the feeding tank, a plunger valve arranged at the bottom of the polymerization reaction kettle, a second jacket arranged on the plunger valve and connected with the heat conduction oil machine. A plunger valve of the polymerization reaction kettle is connected with the high-speed shearing kettle, the upper end of the polymerization reaction kettle is connected with the dehydration assembly, the dehydration assembly is connected with the vacuum assembly, and the nitrogen pipeline comprises a low-pressure nitrogen pipeline and a high-pressure nitrogen pipeline and is used for providing low-pressure nitrogen and high-pressure nitrogen for the whole device. The device can be widely applied to the technical field of resin production devices.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of resin production devices, and more particularly to a special resin pilot plant. BACKGROUND

[0002] Resin is a material used to make various substances extracted from plants, which is a kind of chemical molecule with high strength, and is a polymer or prepolymer used as a plastic base material in a broad sense. The special resin is usually synthesized by using a pilot plant, but the existing resin pilot plant has the following problems:

[0003] (1) The material feeding process needs to be opened under the condition of nitrogen micro-positive pressure, which will lead to insufficient nitrogen protection and oxidation risk of the material, and the gas in the kettle will cause harm to the operator. The solid material dissolves for a long time, and the complete dissolution is not sufficient, which affects the production efficiency.

[0004] (2) After the polymerization reaction, the temperature in the reaction kettle is too high, and if the material is directly discharged, the temperature of the discharge valve is too low, which will cause the viscosity of the material to rise and even solidify, causing the discharge pipeline to be blocked. After discharging several times, the solidified resin in the discharge pipeline needs to be cleaned before discharging, and the hardened resin is not convenient for subsequent processing and treatment.

[0005] (3) After the polymerization reaction, the high-temperature melt pump is usually used for extrusion and drawing, and the pelletizing system (water tank, fan, and pelletizer) is matched. The whole system occupies a large area, has high energy consumption, and takes a long time, and is accompanied by the risk of scalding, which is not conducive to safe production. SUMMARY

[0006] The purpose of the embodiment of the present application is to provide a special resin pilot plant to solve the technical problems in the background art.

[0007] To achieve the above-mentioned purpose, the technical solution adopted by the present application is to provide a special resin pilot plant, which comprises a feeding tank, the feeding tank is externally provided with a first jacket, the first jacket is connected with a heat conducting oil machine, the lower end of the feeding tank is connected with a polymerization kettle, the bottom of the polymerization kettle is provided with a plunger valve, the plunger valve is provided with a second jacket, the second jacket is connected with the heat conducting oil machine, the plunger valve of the polymerization kettle is connected with a high-speed shear kettle, the upper end of the polymerization kettle is connected with a dehydration assembly, the dehydration assembly is connected with a vacuum assembly, and the special resin pilot plant further comprises a nitrogen pipeline, the nitrogen pipeline comprises a low-pressure nitrogen pipeline and a high-pressure nitrogen pipeline, and is used to provide low-pressure nitrogen and high-pressure nitrogen for the whole device.

[0008] Preferably, the dehydration assembly comprises a condenser and a condensate receiving tank connected with the condenser, the condenser is connected with the polymerization kettle, a first adjusting valve is arranged between the condenser and the polymerization kettle, the condenser is also connected with the high-speed shear kettle, and a second adjusting valve is arranged between the condenser and the high-speed shear kettle.

[0009] Preferably, the vacuum assembly comprises a vacuum buffer tank and a screw vacuum pump connected with the vacuum tank buffer tank, and the vacuum buffer tank is connected with the condensate receiving tank.

[0010] Preferably, the low-pressure nitrogen pipeline is connected with the heat conducting oil machine, the feeding tank, the polymerization reactor and the vacuum buffer tank respectively, and a low-pressure nitrogen control valve is arranged between the low-pressure nitrogen pipeline and the heat conducting oil machine, the feeding tank, the polymerization reactor and the vacuum buffer tank.

[0011] Preferably, the high-pressure nitrogen pipeline is connected with the feeding tank, the polymerization reactor and the high-speed shearing kettle respectively, and a high-pressure nitrogen control valve is arranged between the high-pressure nitrogen pipeline and the feeding tank, the polymerization reactor and the high-speed shearing kettle.

[0012] Preferably, a first jacket heat conducting oil control valve is arranged between the heat conducting oil machine and the first jacket, a second jacket heat conducting oil control valve is arranged between the heat conducting oil machine and the second jacket, a third jacket is arranged outside the polymerization reactor, the third jacket is connected with the heat conducting oil machine, and a third jacket heat conducting oil control valve is arranged between the third jacket and the heat conducting oil machine.

[0013] Preferably, a cooling water circulation pipeline and a venting pipeline are further arranged, a fourth jacket is arranged outside the high-speed shearing kettle, and the cooling water circulation pipeline is connected with the fourth jacket.

[0014] Preferably, the venting pipeline is connected with the screw vacuum pump, the condensate receiving tank and the high-speed shearing kettle.

[0015] The beneficial effects of the utility model lie in:

[0016] Compared with the prior art, the pilot device for special resin of the application is provided with a feeding tank, a heat conducting oil machine polymerization reactor, a plunger valve arranged at the bottom of the polymerization reactor, a high-speed shearing kettle, a dehydration assembly, a vacuum assembly, a high-pressure nitrogen pipeline and a low-pressure nitrogen pipeline. The equipment is placed in a nitrogen protection environment through the cooperation of the low-pressure nitrogen pipeline and the vacuum assembly, so that the oxidation of the heat conducting oil and the material is avoided. The material is preheated by the feeding tank, so that the heating and dissolving time of the solid material directly added into the polymerization reactor is shortened, the preheated material is transported by the feeding tank, the oxidation of the material caused by the direct addition of the solid material into the polymerization reactor is avoided, and the risk damage of the odor to the workers is reduced. The material is dehydrated and polymerized through the cooperation of the polymerization reactor and the dehydration assembly. The plunger valve jacket heating can avoid the condensation and blockage of the feeding pipeline of the polymerization reactor and the high-speed shearing kettle at low temperature. The material is broken into small particles by the high-speed shearing kettle, which is beneficial to the subsequent material transfer and post-processing. The devices in the utility model are mutually matched to form a complete device, and the production efficiency and the production safety factor of the special resin are improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description only constitute some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort.

[0018] Figure 1 The structural schematic diagram of the present application is shown in the figure.

[0019] In the figure, various reference signs are as follows:

[0020] 1, feeding tank; 111, first jacket; 2, heat conducting oil machine; 3, polymerization reactor; 311, plunger valve; 312, second jacket; 313, third jacket; 4, high-speed shearing kettle; 411, fourth jacket; 5, condenser; 511, first regulating valve; 512, second regulating valve; 6, condensate receiving tank; 7, vacuum buffer tank; 8, screw vacuum pump; 9, low-pressure nitrogen gas pipeline; 10, high-pressure nitrogen gas pipeline; 11, venting pipeline; 12, cooling water circulation pipeline. DETAILED DESCRIPTION

[0021] In order to make the technical problems, technical solutions and beneficial effects of the present application more clearly understood, the present application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not to limit the present application.

[0022] Please refer to Figure 1 The present application provides a kind of special resin pilot plant device, which includes feeding tank 1, feeding tank 1 is equipped with first jacket 111, first jacket 111 is connected with heat conducting oil machine 2, the lower end of feeding tank 1 is connected with polymerization reactor 3, the bottom of polymerization reactor 3 is provided with plunger valve 311, plunger valve 311 is provided with second jacket 312, second jacket 312 is connected with heat conducting oil machine 2, plunger valve 311 of polymerization reactor 3 is connected with high-speed shearing kettle 4, the upper end of polymerization reactor 3 is connected with dehydration assembly, dehydration assembly is connected with vacuum assembly, and it further includes nitrogen gas pipeline, nitrogen gas pipeline includes low-pressure nitrogen gas pipeline 9 and high-pressure nitrogen gas pipeline 10, for providing low-pressure nitrogen gas and high-pressure nitrogen gas to the whole device.

[0023] In work, through the low-pressure nitrogen pipeline 9 cooperates with the vacuum assembly, the equipment is placed in the nitrogen protection environment, thereby avoiding the oxidation of the heat conducting oil and the material, then the heat conducting oil machine 2 passes the heat conducting oil into the first jacket 111, which is used for preheating the solid material in the charging tank 1, the preheated and dissolved solid material is transferred to the polymerization kettle 3, the water vapor in the polymerization kettle 3 is removed and collected by using the dehydration assembly, through the cooperation of the high-pressure nitrogen pipeline 10 and the heat conducting oil machine 2, the pressure and temperature of the polymerization kettle 3 can be controlled, so that the material after dehydration occurs polymerization reaction in the polymerization kettle 3, and the plunger valve 311 of the polymerization kettle 3 is preheated, then the polymerized material is transferred to the high-speed shearing kettle 4 for shearing and dispersing treatment, which is convenient for further processing of the subsequent material. The above structure design uses the charging tank to preheat the material, which can shorten the heating and dissolving time of the solid material directly added into the polymerization kettle 3, and the charging tank can realize the conveying of the preheated material, which can avoid the oxidation of the solid material directly added into the polymerization kettle and reduce the risk of odor to the workers; the plunger valve 311 jacket heating can avoid the condensation and blockage of the feeding pipeline of the polymerization kettle 3 and the high-speed shearing kettle 4 at low temperature; the high-speed shearing kettle 4 can break the material into small particles, which is beneficial to the subsequent material transfer and post-processing, and the high-speed reaction kettle has small footprint, short discharging time, low energy consumption and high safety factor, which further improves the overall production efficiency.

[0024] In one embodiment, the dehydration assembly includes a condenser 5 and a condensate receiving tank 6 connected to the condenser 5, the condenser 5 is connected to the polymerization kettle 3, and a first regulating valve 511 is arranged between the condenser 5 and the polymerization kettle 3, the dehydration treatment of the polymerization kettle 3 is realized by the cooperation of the condenser 5 and the condensate receiving tank 6, and the water is collected; the condenser 5 is also connected to the high-speed shearing kettle 4, and a second regulating valve 512 is arranged between the condenser 5 and the high-speed shearing kettle 4, which can be used for nitrogen replacement. Here, the actual production can be adjusted to adapt to different reaction environments of different materials.

[0025] In one embodiment, the vacuum assembly includes a vacuum buffer tank 7 and a screw vacuum pump 8 connected to the vacuum buffer tank 7, and the vacuum buffer tank 7 is connected to the condensate receiving tank 6. At the beginning of production, the screw vacuum pump 8 and the vacuum buffer tank 7 are used to vacuumize the charging tank 1, the polymerization kettle 3, the condenser 5, the condensate receiving tank 6 and the vacuum buffer tank 7, so as to fully prepare for the nitrogen environment in the future.

[0026] Further, the low-pressure nitrogen pipeline 9 is connected with the heat conducting oil machine 2, the feeding tank 1, the polymerization reactor 3 and the vacuum buffer tank 7 respectively, and low-pressure nitrogen control valves are arranged between the low-pressure nitrogen pipeline 9 and the heat conducting oil machine 2, the feeding tank 1, the polymerization reactor 3 and the vacuum buffer tank 7; after vacuumizing by the vacuum assembly, the low-pressure nitrogen control valves are opened, and low-pressure nitrogen is delivered to the feeding tank 1, the polymerization reactor 3 and the vacuum buffer tank 7 respectively, wherein the condenser 5 and the condensate receiving tank 6 can receive nitrogen through the polymerization reactor 3 or the vacuum buffer tank 7, so that the feeding tank 1, the polymerization reactor 3 and the dehydration assembly are all in a nitrogen environment, thereby avoiding oxidation of the material during production of the material, and improving production efficiency. In addition, the heat conducting oil in the heat conducting oil machine 2 is also in a nitrogen protection environment, preventing oxidation of the heat conducting oil, reducing the replacement frequency of the heat conducting oil and reducing production cost.

[0027] Still further, the high-pressure nitrogen pipeline 10 is connected with the feeding tank 1, the polymerization reactor 3 and the high-speed shearing kettle 4 respectively, and high-pressure nitrogen control valves are arranged between the high-pressure nitrogen pipeline 10 and the feeding tank 1, the polymerization reactor 3 and the high-speed shearing kettle 4, and the high-pressure nitrogen plays a role in balancing pressure and supplementing pressure, avoiding danger caused by excessively large pressure difference when the material is conveyed between devices.

[0028] Still further, the first jacket heat conducting oil control valve is arranged between the heat conducting oil machine 2 and the first jacket 111, the second jacket heat conducting oil control valve is arranged between the heat conducting oil machine 2 and the second jacket 312, the third jacket 313 is arranged outside the polymerization reactor 3, the third jacket 313 is connected with the heat conducting oil machine 2, and the third jacket heat conducting oil control valve is arranged between the third jacket 313 and the heat conducting oil machine 2.

[0029] In one embodiment, the whole device is also provided with a cooling water circulation pipeline 12 and a venting pipeline 11, the fourth jacket 411 is arranged outside the high-speed shearing kettle 4, and the cooling water pipeline is connected with the fourth jacket 411 and used for maintaining the temperature of the material liquid in the high-speed shearing kettle 4; in addition, the cooling water circulation pipeline 12 is also connected with the condenser 5, the polymerization reactor 3 and the vacuum buffer tank 7 and used for cooling and temperature reduction treatment. The venting pipeline 11 is connected with the screw vacuum pump 8, the condensate receiving tank 6 and the high-speed shearing kettle 4 and used for pressure relief and venting of gas in the devices.

[0030] Further, the polymerization reactor 3 and the high-speed shearing kettle 4 are both provided with a distributor, and the feeding tank 1, the polymerization reactor 3 and the high-speed shearing kettle 4 are all provided with a feeding port.

[0031] In addition, the utility model also has a PLC control system, which is used for controlling the opening and closing of various valves and pipelines, and controlling the pressure and temperature of various devices.

[0032] It is worth noting that each device mentioned in the utility model is connected through a connecting pipeline, and each connecting pipeline is provided with a corresponding safety valve.

[0033] The working principle of the utility model is:

[0034] (1) nitrogen replacement and material pretreatment: the vacuum assembly is used for vacuumizing treatment of the charging tank 1, the polymerization reactor 3 and the dehydration assembly, simultaneously, the low-pressure nitrogen pipeline 9 is opened, each equipment is placed in the nitrogen protection environment, the weighed solid material is added into the charging tank 1, the solid material is preheated and dissolved through the first jacket 111 heating.

[0035] (2) material receiving: the weighed liquid material is sequentially added into the polymerization reactor 3, the stirring is opened, the third jacket heat conducting oil control valve is opened, the temperature is raised to the target temperature, the preheated material in the charging tank 1 is added into the polymerization reactor 3 through the distributor, the charging port and each valve are closed.

[0036] (3) free water removal: the temperature in the polymerization reactor 3 gradually rises, when the temperature reaches 90-100 DEG C, the high-pressure nitrogen pipeline 10 is continuously filled with nitrogen to 3.0MPa in the polymerization reactor 3, at this time, the oil temperature in the third jacket 313 of the polymerization reactor 3 continuously rises to 340 DEG C and enters the constant state, the pressure in the polymerization reactor 3 also continuously rises to 4.0MPa along with the temperature rise of the third jacket 313, at this time, the first regulating valve 511 is controlled to open, the water vapor in the polymerization reactor 3 is removed through the pressure relief mode, the water vapor and small molecules are removed through the condenser 5 and enter the condensate collection tank 6, when the pressure in the polymerization reactor 3 reduces to 3.5MPa, the first regulating valve 511 is controlled to close, after the continuous operation for a period of time, along with the gradual reduction of the water in the polymerization reactor 3, the material temperature in the polymerization reactor 3 begins to rise, when the temperature in the reactor rises to about 250-260 DEG C, there is no free water in the polymerization reactor 3, and the water in the condensate receiving tank 6 is weighed.

[0037] (4) material polymerization: the pressure in the polymerization reactor 3 is controlled to about 3.5MPa, and maintained constant for more than 1h, so that the prepolymerization reaction is completed, then the first regulating valve 511 is controlled to open, the pressure in the polymerization reactor 3 gradually reduces to 0.5MPa, along with the pressure reduction in the polymerization reactor 3, the low-boiling-point small molecules and non-polymer begin to vaporize, and the prepolymerization is completed; then, the screw vacuum pump 8 and the vacuum buffer tank 7 are opened, the polymerization reactor 3 is vacuumized, then the polymerization reactor 3 is input with low-pressure nitrogen, the pressure in the polymerization reactor 3 is slowly discharged to normal pressure, the material temperature is controlled to about 315 DEG C, and constant operation is carried out for 1h, so that the polymerization is completely completed; the water in the condensate receiving tank 6 and the vacuum buffer tank 7 is discharged to the specified container for weighing, and the reaction conversion rate is calculated.

[0038] (5) Material transfer: after the completion of the polymerization reaction, open the low-pressure nitrogen pipeline 9, the polymerization reactor 3 is filled with nitrogen to the stable pressure of 0.5 MPa, the plunger valve 311 is heated by using the heat conducting oil machine 2, the plunger valve 311 of the polymerization reactor 3 is slowly opened, and a quantitative liquid material is added into the high-speed shearing kettle 4, the cooling water circulation pipeline 12 is opened, the liquid material temperature in the high-speed shearing kettle 4 is kept constant, the stirring is opened to the speed above 1000 RPM, and it is ensured that the material entering the high-speed shearing kettle 4 can be quickly broken. The vent pipeline of the high-speed shearing kettle 4 is appropriately opened, the material in the polymerization reactor 3 is received into the high-speed shearing kettle 4, when the pressure in the polymerization reactor 3 sharply decreases and the pipeline has the sound of overpressure, the material receiving is completed, the plunger valve 311 of the polymerization reactor 3 is closed, and the vent pipeline of the high-speed shearing kettle 4 is closed.

[0039] (6) Material post-processing: after the material is completely transferred to the high-speed shearing kettle 4, the dispersing disc speed is kept above 1000 RPM, the fourth jacket 411 cooling water is kept running, and the dispersion is kept for 20 min, so as to ensure that the material is completely sheared into small particles. The material temperature in the high-speed shearing kettle is observed, when the material temperature reaches 60 DEG C, the dispersing speed is reduced, the stirring is kept in the open state, and when the pressure is 0.2 MPa, the material is discharged to the external centrifuge or filter.

[0040] It should be noted that when an element is referred to as being "fixed" or "set" on another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or indirectly connected to the other element.

[0041] The above only describes the preferred embodiments of the present application and is not used to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A pilot plant for specialty resins, characterized by: It includes a feeding tank, the feeding tank is provided with a first jacket, the first jacket is connected with a heat conducting oil machine, the lower end of the feeding tank is connected with a polymerization reactor, the bottom of the polymerization reactor is provided with a plunger valve, the plunger valve is provided with a second jacket, the second jacket is connected with the heat conducting oil machine, the plunger valve of the polymerization reactor is connected with a high-speed shearing kettle, the upper end of the polymerization reactor is connected with a dehydration assembly, the dehydration assembly is connected with a vacuum assembly, and the device further comprises a nitrogen pipeline, the nitrogen pipeline comprises a low-pressure nitrogen pipeline and a high-pressure nitrogen pipeline, and is used for providing high-pressure nitrogen and low-pressure nitrogen for the whole device.

2. The special resin pilot plant apparatus according to claim 1, characterized by: The dehydration assembly comprises a condenser and a condensate receiving tank connected with the condenser, the condenser is connected with the polymerization reactor, a first adjusting valve is arranged between the condenser and the polymerization reactor, and the condenser is also connected with the high-speed shearing kettle, and a second adjusting valve is arranged between the condenser and the high-speed shearing kettle.

3. The special resin pilot plant apparatus according to claim 2, characterized by: The vacuum assembly comprises a vacuum buffer tank and a screw vacuum pump connected with the vacuum buffer tank, and the vacuum buffer tank is connected with the condensate receiving tank.

4. The pilot plant for specialty resins according to claim 3, characterized in that: The low-pressure nitrogen pipeline is connected with the heat conducting oil machine, the feeding tank, the polymerization reactor and the vacuum buffer tank respectively, and low-pressure nitrogen control valves are arranged between the low-pressure nitrogen pipeline and the heat conducting oil machine, the feeding tank, the polymerization reactor and the vacuum buffer tank.

5. The special resin pilot plant apparatus according to claim 4, characterized in that: The high-pressure nitrogen pipeline is connected with the feeding tank, the polymerization reactor and the high-speed shearing kettle respectively, and high-pressure nitrogen control valves are arranged between the high-pressure nitrogen pipeline and the feeding tank, the polymerization reactor and the high-speed shearing kettle.

6. The special resin pilot plant apparatus according to claim 5, characterized by: First jacket heat conducting oil control valves are arranged between the heat conducting oil machine and the first jacket and between the heat conducting oil machine and the second jacket, a third jacket is arranged outside the polymerization reactor, the third jacket is connected with the heat conducting oil machine, and third jacket heat conducting oil control valves are arranged between the third jacket and the heat conducting oil machine.

7. The special resin pilot plant apparatus according to claim 6, characterized by: Cooling water circulation pipelines and vent pipelines are further arranged, a fourth jacket is arranged outside the high-speed shearing kettle, and the cooling water circulation pipelines are connected with the fourth jacket.

8. The special resin pilot plant apparatus according to claim 7, characterized by: The vent pipelines are connected with the screw vacuum pump, the condensate receiving tank and the high-speed shearing kettle.

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