High-temperature and high-pressure reaction kettle with stirring function

Abstract

The utility model belongs to the technical field of chemical reaction devices, and particularly discloses a high-temperature and high-pressure reaction kettle with a stirring function, which comprises a kettle body, a pneumatic stirring mechanism, an air inlet pipeline, a light phase discharge pipeline and a pressure measuring device, the stirring connecting rod penetrates through the kettle body, one end of the stirring connecting rod extends out of the kettle body and is connected with the pneumatic motor, the stirring blade is arranged on the stirring connecting rod in the kettle body, and a sealing structure is arranged at the bottom of the pneumatic motor. According to the reaction kettle, the pneumatic motor is used for replacing mechanical stirring, stepless speed change can be achieved, the stirring speed is relatively stable through pressure regulation, the sealing cooling sleeve and the sealing flange plate which are integrally formed with the pneumatic motor are adopted, and the sealing graphite ring is arranged in the sealing cooling sleeve; the octagonal gasket is additionally arranged between the sealing flange plate and the fixed flange plate at the top of the kettle body for sealing and is fastened through the bolt, so that the pressure resistance of the reaction kettle is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to chemical reaction device technical field, concretely is a kind of high temperature and high pressure reaction kettle with stirring. BACKGROUND

[0002] High temperature and high pressure reaction kettle is the container for carrying out physical, chemical reaction, heating, pressurization, cooling and other functions can be realized through reaction kettle, high temperature and high pressure reaction kettle is widely used in petrochemical industry, coal chemical industry, rubber, pesticide, dye, medical treatment, food and other industries, to complete vulcanization, hydrogenation, nitration, polymerization, condensation and other process. However, many physical, chemical reactions need to be carried out under stirring, make reaction medium more uniform. The high temperature and high pressure reaction kettle with stirring of current generally uses mechanical seal, cost is higher, service life is shorter, maintenance cost is higher and carries motor is heavier, heat is serious in long time operation, reduce the safety and the operation convenience of device, increase energy consumption. There is the device that pneumatic motor is used in reaction kettle on market, but it is limited by the lower use temperature of pneumatic motor, reaction kettle temperature is not high, and water bath or oil bath is used. The application range of reaction kettle is greatly limited. For example, in the preparation reaction of special asphalt, temperature range of 360 DEG C~440 DEG C is generally required, water bath or oil bath cannot meet the requirement obviously. The use temperature of pneumatic motor is low, mainly because the thermal expansion and contraction of material under high temperature can lead to the friction increase of stirring connecting rod and sealing system, stirring stagnation even damage.

[0003] Prior art patent (CN109254117) discloses a kind of oilfield production liquid with defoaming agent indoor evaluation device and evaluation method, it is related to high temperature and high pressure reaction kettle with stirring of stainless steel, control reaction kettle temperature is 60~100 ℃, stirring speed 500~1000r / min internal pressure is 0.3~0.7MPa.

[0004] To solve the above problems, a kind of mechanical stirring is replaced by pneumatic stirring, the stirring function of reaction kettle is realized, and the pressure resistance of reaction kettle is realized through the integrated design of reaction kettle cover and pneumatic stirring motor, additionally, cooling circulation system is added outside sealing system cavity, to reduce the temperature of sealing system and pneumatic motor. Practical new type content

[0005] The utility model aims at providing a kind of high temperature and high pressure reaction kettle with stirring, to solve the problems, such as high cost of mechanical seal, short service life and motor influence operation in the stirring technology of existing high temperature and high pressure reaction kettle, low safety, high energy consumption, and the heating temperature of reaction kettle is limited by the low temperature range of pneumatic motor.

[0006] The utility model provides a high temperature high pressure reation kettle with stirring, including kettle body, pneumatic stirring mechanism, gas pipeline, light phase discharge pipeline and pressure measuring device,

[0007] The pneumatic stirring mechanism includes pneumatic motor, stirring connecting rod and stirring blade, the pneumatic motor is fixed in the top of kettle body, the stirring connecting rod is arranged in the kettle body, and one end of the stirring connecting rod is connected with the pneumatic motor after extending out of the kettle body, the stirring blade is arranged on the stirring connecting rod in the kettle body,

[0008] The bottom of pneumatic motor is equipped with sealing structure, sealing structure includes sealing cooling jacket and sealing graphite ring and sealing flange plate, sealing cooling jacket is arranged in the bottom of pneumatic motor, sealing flange plate is arranged in the bottom of sealing cooling jacket, sealing cooling cavity is equipped in sealing cooling jacket, sealing graphite ring is arranged in sealing cooling jacket, sealing graphite ring is sleeved on the stirring connecting rod,

[0009] The top of kettle body is equipped with fixed flange plate, eight corner pad is arranged between fixed flange plate and sealing flange plate, and the fixed flange plate is fixed with the sealing flange plate through bolt,

[0010] The gas pipeline and light phase discharge pipeline are sequentially arranged through sealing flange plate, eight corner pad and fixed flange plate and communicated with the kettle body,

[0011] The pressure measuring device includes gas pressure gauge, the gas pressure gauge is communicated with the kettle body through installation pipeline, and the installation pipeline is equipped with emergency pressure relief valve for emergency pressure relief when the exhaust pipeline is blocked.

[0012] Specifically, the bottom of sealing graphite ring is fixed by sealing ring fixing screw.

[0013] Further, the kettle body is also provided with a physical temperature probe, and the physical temperature probe is fixed between the sealing flange plate and the sealing flange plate through a through clamp joint.

[0014] Specifically, the pneumatic motor, the sealing cooling jacket and the sealing flange plate are integrally formed.

[0015] Further, the pneumatic motor is provided with a pneumatic motor air inlet and a pneumatic motor sound-attenuating exhaust port.

[0016] Further, the gas pipeline is provided with an inlet pressure regulating valve, and the inlet pressure regulating valve is a one-way valve.

[0017] Preferably, the number of stirring blades is three, which are arranged in the upper, middle and lower parts of the kettle body respectively, and the stirring blades are fixed with the stirring connecting rod through screws.

[0018] Further, the bottom of the kettle body is provided with a discharge port, and a material discharge plug is arranged at the discharge port.

[0019] The present application has the following beneficial effects:

[0020] 1. The high-temperature and high-pressure reaction kettle with stirring of the present application uses a pneumatic motor to replace mechanical stirring to realize the stirring function of the reaction kettle, can realize stepless speed change, and makes the stirring speed relatively stable through pressure regulation, so that the speed of pneumatic stirring can be effectively controlled.

[0021] 2. The high-temperature and high-pressure reaction kettle with stirring of the present application is provided with a sealing structure between the pneumatic motor and the kettle body, adopts a sealing cooling sleeve and a sealing flange plate which are integrally formed with the pneumatic motor, and is provided with a sealing graphite ring in the sealing cooling sleeve, and eight-corner gaskets are additionally arranged between the sealing flange plate and the fixed flange plate at the top of the kettle body and are fastened through bolts, so that the pressure resistance of the reaction kettle is increased, and the problems of the existing reaction kettle with a mechanical sealing structure, such as high cost, short service life, high maintenance cost, heavy carrying motor, serious heating during long-time operation, reduced safety and operation convenience of the device, and increased energy consumption, are solved.

[0022] 3. The sealing cooling sleeve of the pneumatic motor of the present application is provided with a sealing cooling cavity, and cooling circulating liquid can be introduced into the sealing cooling cavity to reduce the temperature of the sealing graphite ring and the stirring connecting rod to the normal use temperature range of pneumatic stirring.

[0023] 4. The reaction kettle of the present application is additionally provided with a one-way valve on the gas inlet pipeline, so that the safety of the reaction kettle is increased.

[0024] 5. The kettle body bottom discharge valve of the high-temperature and high-pressure reaction kettle with stirring of the present application adopts a screw plug material discharge plug, so that the dead volume during stirring is reduced, and the reaction of the bottom raw materials is avoided.

[0025] 6. The gas pressure gauge measuring part of the reaction kettle of the present application is connected with an emergency pressure relief valve for pressure relief through a tee joint, so that the pressure accumulation in the kettle under abnormal working conditions is prevented. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical scheme of the present application, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creating any creative labor.

[0027] Figure 1 is a structural schematic view of the high-temperature and high-pressure reaction kettle with stirring of the present application;

[0028] In the figure: 1 - kettle body, 2 - pneumatic motor, 3 - air inlet pipeline, 4 - light phase discharge pipeline, 5 - stirring connecting rod, 6 - stirring blade, 7 - sealing cooling jacket, 8 - sealing graphite ring, 9 - sealing flange plate, 10 - sealing ring fixing screw, 11 - fixed flange plate, 12 - octagonal pad, 13 - gas pressure gauge, 14 - emergency pressure relief valve, 15 - physical temperature measuring probe, 16 - straight-through sleeve joint, 17 - pneumatic motor air inlet, 18 - pneumatic motor sound-attenuating exhaust, 19 - air inlet pressure regulating valve, 20 - material discharge plug. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the utility model specification. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0030] In one specific embodiment of the utility model, as shown in the figure, Figure 1 A high-temperature high-pressure reaction kettle with stirring is used for asphalt thermal polycondensation, which comprises a kettle body 1, a pneumatic stirring mechanism, an air inlet pipeline 3, a light phase discharge pipeline 4 and a pressure measuring device.

[0031] The pneumatic stirring mechanism comprises a pneumatic motor 2, a stirring connecting rod 5 and a stirring blade 6. The pneumatic motor 2 is fixed above the kettle body 1. The stirring connecting rod 5 is arranged in the kettle body 1 and has one end extending out of the kettle body 1 and connected with the pneumatic motor 2. The stirring connecting rod 5 is made of a steel metal which is not easy to deform. The stirring blade 6 is arranged on the stirring connecting rod 5 in the kettle body 1. The number of the stirring blade 6 is three, which are arranged at the upper part, the middle part and the lower part of the kettle body 1 respectively. The stirring blade 6 at the upper part is above the material, the stirring blade 6 at the middle part is in the middle of the material, and the stirring blade 6 at the lower part is close to the kettle bottom, so as to ensure the stirring effect. The stirring blade 6 and the stirring connecting rod 5 are fixed by screws, so as to facilitate the dismounting and replacement of the stirring blade 6.

[0032] The pneumatic motor 2 is provided with a pneumatic motor air inlet 17 and a pneumatic motor sound-attenuating exhaust 18. The pneumatic motor air inlet 17 is provided with an air pressure regulating valve in front, so as to realize stepless speed change. The stirring speed can be relatively stable by pressure regulation.

[0033] The bottom of the pneumatic motor 2 is provided with a sealing structure, which comprises a sealing cooling jacket 7, a sealing graphite ring 8 and a sealing flange plate 9. The sealing cooling jacket 7 is arranged at the bottom of the pneumatic motor 2, and the sealing flange plate 9 is arranged at the bottom of the sealing cooling jacket 7. The pneumatic motor 2, the sealing cooling jacket 7 and the sealing flange plate 9 are integrally formed. The sealing cooling jacket 7 is internally provided with a sealing cooling cavity, and cooling circulating liquid can be introduced into the sealing cooling cavity to reduce the temperature of the sealing graphite ring and the stirring connecting rod to the normal use temperature range of the pneumatic stirring.

[0034] The sealing graphite ring 8 is arranged in the sealing cooling jacket 7 and is sleeved on the stirring connecting rod 5. Preferably, the sealing graphite ring 8 is stacked by a plurality of sealing graphite rings. The bottom of the sealing graphite ring 8 is fixed by a sealing ring fixing screw 10 to improve the sealing effect and prevent most of the oil gas from leaking out. A small amount of leaked oil gas can be communicated with the exhaust system through a pipeline to prevent oil gas from polluting the working place.

[0035] The top of the kettle body 1 is provided with a fixed flange plate 11, and an octagonal pad 12 is arranged between the fixed flange plate 11 and the sealing flange plate 9. Preferably, the octagonal pad 12 is a stainless steel octagonal pad, which can ensure the temperature resistance, pressure resistance and asphalt corrosion resistance of the device. The fixed flange plate 11 and the sealing flange plate 9 are fixed by bolts to increase the pressure resistance of the kettle body.

[0036] The gas inlet pipeline 3 and the light phase discharge pipeline 4 are sequentially communicated with the kettle body 1 after passing through the sealing flange plate 9, the octagonal pad 12 and the fixed flange plate 11. The gas inlet pipeline 3 can be connected with air or nitrogen according to experimental requirements. The gas inlet pipeline 3 is provided with an inlet pressure regulating valve 19, which is a one-way valve. The pipeline entering the kettle can be extended into the material at the bottom of the kettle as required, so that the gas participates in the reaction, or the pipeline can be connected with the surface of the material to ensure the reaction atmosphere. The gas source pressure is required to be 0-1.6 MPa. The light phase discharge pipeline 4 can be provided with a heating tape and a temperature measuring thermocouple. The temperature measurement and heating interlocking control can be used to control the discharge of the light phase in the reaction process by controlling the temperature, and the heating can prevent the light phase from condensing and blocking the pipeline during discharge. The controllable temperature is room temperature-400℃.

[0037] The pressure measuring device comprises a gas pressure gauge 13, which is communicated with the kettle body 1 through a mounting pipeline. The mounting pipeline is provided with an emergency pressure relief valve 14, which is used for emergency pressure relief when the exhaust pipeline is blocked.

[0038] The kettle body 1 is also provided with a physical temperature measuring probe 15, which is fixed between the sealing flange plate 9 and the straight-through collar joint 16.

[0039] Preferably, the kettle body 1 is made of 316L steel, the bottom of the kettle body 1 is provided as an ellipsoid, so that the reacted material flows out from the bottom of the reaction kettle, and the contact area of the bottom heating is increased. The bottom of the kettle body 1 is provided with a discharge port, and the discharge port is provided with a material discharge plug 20, which is screwed to reduce the dead volume during stirring and avoid insufficient reaction of the raw material at the bottom.

[0040] The bottom and side of the reaction kettle can be heated by a heating furnace, and the heating is linked with the temperature measurement of the physical temperature probe 15, so that the reaction temperature of the asphalt can be accurately controlled. The asphalt heat polycondensation temperature is 370-400℃, and the heating temperature should not be too high, which may cause local overheating and the reaction cannot achieve the expected effect. The stepwise heating can be set to prevent local overheating.

[0041] In addition, the gas pressure gauge 13 of the pressure measuring device can measure the range of 0-2.5MPa. The pressure can directly reflect the pressure in the kettle, and the pressure gauge needs to be high-temperature resistant. In order to accurately control the pressure in the reaction kettle, an electric regulating valve and a pressure sensor can be connected to the light phase discharge pipeline 4, and the opening degree of the electric regulating valve is linked with the pressure.

[0042] In the use of the reaction kettle in the embodiment, the fixing bolts between the sealing flange plate 9 and the fixed flange plate 11 are loosened, the pneumatic motor 2, the sealing cooling jacket 7 and the sealing flange plate 9 are removed, the asphalt is added to about 2 / 3 of the kettle body 1, preheating is performed, the asphalt is softened into a fluid (100℃-300℃), the octagonal pad is placed, the pneumatic motor 2, the sealing cooling jacket 7 and the sealing flange plate 9 are covered and screwed tightly, the cooling circulating liquid is added to the sealing cooling jacket 7, the circulating refrigeration of the graphite ring sealing cooling circulating cavity is started, the pneumatic stirring inlet valve is opened, and the stirring is performed. The safety pressure relief valve and the light phase discharge electric regulating valve are closed, the kettle inlet valve is opened, the gas is flushed in, the specified pressure (normal pressure-0.3MPa) is reached, the light phase electric regulating valve is opened, and the pressure is automatically controlled. The heating temperature of the reaction kettle is gradually increased, the kettle reaches the reaction temperature (370-400℃), and the kettle is maintained for a certain time (1-10h), the heating and stirring are stopped, and the gas in the kettle is discharged. The temperature is lowered to the temperature at which the heat polycondensation asphalt can still flow out, the material discharge plug 20 at the bottom of the kettle body 1 is opened, and the asphalt flows out. After the asphalt is discharged, the upper flange cover is opened, the kettle is cleaned, and the next kettle experiment is prepared.

[0043] The above only discloses a preferred embodiment of the utility model, and of course cannot limit the scope of the utility model, so equivalent changes made according to the utility model claims still belong to the scope covered by the utility model.

Claims

1. A high-temperature high-pressure stirred reaction vessel, characterized by comprising: The device comprises a kettle body (1), a pneumatic stirring mechanism, a gas inlet pipeline (3), a light phase discharge pipeline (4) and a pressure measuring device, The pneumatic stirring mechanism comprises a pneumatic motor (2), a stirring connecting rod (5) and stirring blades (6), the pneumatic motor (2) is fixed above the kettle body (1), the stirring connecting rod (5) is arranged in the kettle body (1) and one end thereof extends out of the kettle body (1) and is connected with the pneumatic motor (2), and the stirring blades (6) are arranged on the stirring connecting rod (5) in the kettle body (1). The bottom of the pneumatic motor (2) is provided with a sealing structure, the sealing structure comprises a sealing cooling jacket (7), a sealing graphite ring (8) and a sealing flange (9), the sealing cooling jacket (7) is arranged at the bottom of the pneumatic motor (2), the sealing flange (9) is arranged at the bottom of the sealing cooling jacket (7), a sealing cooling cavity is arranged in the sealing cooling jacket (7), the sealing graphite ring (8) is arranged in the sealing cooling jacket (7), and the sealing graphite ring (8) is sleeved on the stirring connecting rod (5). The top of the kettle body (1) is provided with a fixed flange (11), an octagonal pad (12) is arranged between the fixed flange (11) and the sealing flange (9), and the fixed flange (11) and the sealing flange (9) are fixed through bolts. The gas inlet pipeline (3) and the light phase discharge pipeline (4) are sequentially arranged through the sealing flange (9), the octagonal pad (12) and the fixed flange (11) and are communicated with the kettle body (1). The pressure measuring device comprises a gas pressure gauge (13), the gas pressure gauge (13) is communicated with the kettle body (1) through a mounting pipeline, and an emergency pressure relief valve (14) for emergency pressure relief when the gas pipeline is blocked is arranged on the mounting pipeline.

2. The high temperature and high pressure reactor with stirring according to claim 1, characterized in that, The bottom of the sealing graphite ring (8) is fixed by a sealing ring fixing screw (10).

3. The high temperature and high pressure reactor with stirring according to claim 1, characterized in that, A physical temperature measuring probe (15) is further arranged in the kettle body (1), and the physical temperature measuring probe (15) is fixed through a through clamp sleeve joint (16) between the sealing flange (9).

4. The high temperature and high pressure reactor with stirring according to claim 1, characterized in that, The pneumatic motor (2), the sealing cooling jacket (7) and the sealing flange (9) are integrally formed.

5. The high temperature and high pressure reactor with stirring according to claim 1, characterized in that, The pneumatic motor (2) is provided with a pneumatic motor air inlet (17) and a pneumatic motor silencing air outlet (18).

6. The high temperature and high pressure reactor with stirring according to claim 1, characterized in that, The gas inlet pipeline (3) is provided with an inlet pressure regulating valve (19), and the inlet pressure regulating valve (19) is a one-way valve.

7. The high temperature and high pressure reactor with stirring according to claim 1, characterized in that, The number of the stirring blades (6) is three, which are arranged at the upper part, the middle part and the lower part of the kettle body (1), and the stirring blades (6) are fixed through screws between the stirring blades (6) and the stirring connecting rod (5).

8. The high temperature and high pressure reactor with stirring according to claim 1, characterized in that, The bottom of the kettle body (1) is provided with a discharge port, and the discharge port is provided with a material discharge plug (20).

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