Reaction kettle

Abstract

The utility model discloses a reaction kettle which comprises a vertical inner tank, a tank cover covering the top of the inner tank, a stirrer arranged at the top of the tank cover, a material injection pipe arranged on the tank cover and a material discharge pipe arranged at the bottom of the inner tank, an outer tank is sleeved outside the inner tank, the inner tank is fixedly connected with the outer tank, a closed main oil chamber is arranged between the inner tank and the outer tank, and the inner tank and the outer tank are communicated through a pipeline. The main oil chamber is filled with heat-conducting oil, and a heating pipe for heating the heat-conducting oil is fixedly arranged on the outer tank; an expansion oil tank is fixedly connected to the outer tank, an auxiliary oil chamber is arranged in the expansion oil tank and communicated with the main oil chamber, and a sliding sleeve is arranged on the expansion oil tank. After being heated and expanded, the heat conduction oil in the main oil chamber enters the auxiliary oil chamber in the expansion oil tank to push the sliding sleeve to increase the volume of the auxiliary oil chamber, so that the volume change of the heat conduction oil in the main oil chamber is compensated, and an inner tank or an outer tank is prevented from being damaged. As the heat-conducting oil in the main oil chamber and the auxiliary oil chamber is not contacted with the outside atmosphere, the heat-conducting oil is prevented from going bad, and the service life of the heat-conducting oil can be prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical and pharmaceutical equipment, in particular to a reaction kettle. Background Art

[0002] Reactors are common production equipment in the chemical and pharmaceutical industries. Raw materials are added to the reactor, where they mix and react. Many reactions require heating, and oil heating is a common method. These oil-heated reactors have a two-layer structure: an inner cylinder encased in an outer cylinder. Between these two cylinders lies a sealed oil chamber filled with thermal oil, which is heated by an electric heater.

[0003] Since the volume of the heat transfer oil will expand after heating, an expansion oil tank is usually set up to connect the expansion oil tank to the oil chamber. The expansion oil tank is used to compensate for the volume change caused by the expansion and contraction of the heat transfer oil in the oil chamber to prevent the reactor from bursting.

[0004] Because the expansion tank is connected to the outside atmosphere, air will flow between the expansion tank and the outside atmosphere as the thermal oil flows between the oil chamber and the expansion tank. Due to the presence of oxygen and water vapor in the air, the thermal oil can deteriorate due to oxidation or water absorption after prolonged contact with air, affecting its heat transfer performance and shortening its service life.

[0005] Patent application CN202752017U discloses a horizontal reactor that uses thermal oil for heating and incorporates an expansion tank to compensate for changes in the oil's volume during heating. This expansion tank must be connected to the atmosphere, exposing the thermal oil to air and ultimately shortening its lifespan due to oxidation. Utility Model Content

[0006] The technical problem to be solved by the utility model is to provide a reactor for solving the problem that when the current reactor is heated by oil, the heat transfer oil will deteriorate after being in contact with air for a long time, thereby reducing the service life of the heat transfer oil.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0008] A reactor comprises a vertical inner tank, a tank cover covering the top of the inner tank, an agitator arranged on the top of the tank cover, a filling pipe arranged on the tank cover and a discharge pipe arranged at the bottom of the inner tank, the inner tank is covered with an outer tank, the inner tank and the outer tank are fixedly connected, a closed main oil chamber is between the inner tank and the outer tank, the main oil chamber is filled with heat transfer oil, and a heating pipe for heating the heat transfer oil is fixedly arranged on the outer tank; an expansion oil tank is fixedly connected to the outer tank, the interior of the expansion oil tank is an auxiliary oil chamber, the auxiliary oil chamber is communicated with the main oil chamber, and a sliding sleeve for adjusting the volume of the auxiliary oil chamber is provided on the expansion oil tank.

[0009] Furthermore, a sliding seat is fixedly connected to the side of the expansion tank away from the outer tank, the sliding sleeve is convex in shape, the part with a larger diameter of the sliding sleeve is slidingly connected to the sliding seat, and the end with a smaller diameter of the sliding sleeve extends into the auxiliary oil chamber, and the sliding sleeve is sealed with the sliding seat.

[0010] Furthermore, a pressure plate is fixedly connected to the side of the slide away from the expansion tank, and an adjustment spring is provided in the slide. One end of the adjustment spring rests on the slide sleeve, and the other end rests on the pressure plate. The pressure plate is provided with a balancing hole for connecting the inside and outside of the slide.

[0011] Furthermore, a flexible sealing bag fixedly connected to the expansion tank is provided in the auxiliary oil chamber, and the sealing bag covers the outside of the sliding sleeve.

[0012] Furthermore, a circulation pipe is connected between the top and bottom of the main oil chamber, and an oil pump is provided on the circulation pipe. Driven by the oil pump, the heat transfer oil flows from top to bottom in the circulation pipe.

[0013] Furthermore, a spiral guide plate is provided between the side wall of the inner tank and the side wall of the outer tank, and the inner tank and the outer tank are both fixedly connected to the guide plate.

[0014] Furthermore, the transmission shaft of the agitator is inserted downward into the inner tank, and a balance ring is fixedly connected to the transmission shaft, and the balance ring is close to the lower part of the inner tank.

[0015] Furthermore, the balance ring includes two symmetrically arranged halves, each of which includes a sleeve buckled on the transmission shaft and a half ring arranged outside the sleeve, and a spoke is fixedly connected between the half ring and the corresponding sleeve. The half rings of the two halves are connected to each other and clamped outside the transmission shaft, and a pin is provided on one of the sleeves, and the pin is radially inserted into the transmission shaft.

[0016] The positive effects of this utility model are:

[0017] 1. The reactor's outer tank is equipped with an adjustment unit, consisting of an expansion tank, a slide, and a sleeve. When the thermal oil in the main oil chamber between the outer and inner tanks expands due to heat, it enters the auxiliary oil chamber in the expansion tank through the oil hole in the outer tank, pushing the sleeve to increase the volume of the auxiliary oil chamber. This compensates for the volume change of the thermal oil in the main oil chamber and prevents damage to the inner or outer tanks. Since the thermal oil in both the main and auxiliary oil chambers is not exposed to the outside atmosphere, it is prevented from deteriorating due to oxidation or absorption of water vapor, thereby extending the service life of the thermal oil.

[0018] 2. A circulation pipe connecting the top and bottom of the main oil chamber is provided on the outer tank. An oil pump is provided on the circulation pipe. A spiral guide plate is provided between the inner tank and the outer tank in the main oil chamber. When the oil pump is running, the heat transfer oil at the bottom of the main oil chamber flows upward through the flow channel formed between the guide plates, thereby uniformly heating the inner tank and preventing excessive temperature difference between different parts of the inner tank, which in turn leads to uneven reaction. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural diagram of the utility model;

[0020] Figure 2 It is a structural diagram of the adjustment unit;

[0021] Figure 3 It is a schematic diagram of the structure of the adjustment unit after the oil in the main oil chamber expands and enters the auxiliary oil chamber;

[0022] Figure 4 yes Figure 1 Top view of the middle balance ring;

[0023] 1. Adjustment unit; 2. Cover plate; 3. Insulation material; 4. Outer tank; 5. Guide plate; 6. Flow channel; 7. Inner tank; 8. Oil filling pipe; 9. Tank cover; 10. Filling pipe; 11. Agitator; 12. Exhaust pipe; 13. Circulation pipe; 14. Balancing ring; 15. Stirring wheel; 16. Oil pump; 17. Main oil chamber; 18. Heating pipe; 19. Discharge pipe; 20. Fixed flange; 21. Oil hole; 22. Expansion tank; 23. Sealing bag; 24. Sleeve; 25. Pressure ring; 26. Sliding seat; 27. Adjustment spring; 28. Balancing hole; 29. Pressure plate; 30. Half ring; 31. Jacket; 32. Spoke; 33. Auxiliary oil chamber; 34. Oil drain pipe. DETAILED DESCRIPTION

[0024] Example 1

[0025] like Figures 1 to 3As shown, a reactor comprises a vertical inner tank 7, a tank cover 9 covering the top of the inner tank 7, and an agitator 11 arranged on the top of the tank cover 9. The tank cover 9 is connected to the top of the inner tank 7 by a flange, and two injection pipes 10 are provided on the top of the tank cover 9, and a discharge pipe 19 is provided at the bottom of the tank cover 9.

[0026] The inner tank 7 is enclosed by the outer tank 4. The inner and outer tanks 7 and 4 are fixedly connected, forming a closed main oil chamber 17 between them. The main oil chamber 17 is filled with thermal oil. A heating pipe 18 is fixedly installed at the bottom of the outer tank 4 and inserted into the main oil chamber 17 to heat the thermal oil. Three support legs are fixedly connected to the bottom of the outer tank 7. The top of the outer tank 4 is equipped with an oil filling pipe 8 and an exhaust pipe 12, and the bottom of the outer tank 4 is equipped with an oil drain pipe 34. The oil filling pipe 8, the oil drain pipe 34, and the exhaust pipe 12 are all equipped with valves.

[0027] An adjustment unit 1 is installed at the bottom of the outer tank 4. This adjustment unit 1 includes a fixed flange 20 welded to the bottom of the outer tank 4. A cylindrical expansion tank 22 is bolted to the bottom of the fixed flange 20. A slide 26 is also bolted to the bottom of the expansion tank 22. The expansion tank 22 contains a secondary oil chamber 33, which communicates with the bottom of the main oil chamber 17 via an oil hole 21 provided in the bottom of the outer tank 4. A sliding sleeve 24 is installed within the expansion tank 22. This sleeve 24 is hollow and convex, with a diameter smaller at the top and larger at the bottom. The sleeve 24 is sealed at the top and open at the bottom. Made of brass, the sleeve 24's lower portion is slidably connected to the slide 26. The upper portion of the sleeve 24 is fitted with a clearance fit across the bottom of the expansion tank 22, extending into the secondary oil chamber 33. The sleeve 24 and slide 26 are sealed together by a sealing ring fitted over the sleeve 24. Sealant is applied between the expansion oil tank 22 and the fixed flange 20 , and between the sliding seat 26 and the expansion oil tank 22 .

[0028] The lower side of the slide 26 is fixedly connected to a pressure plate 29 by bolts. An adjustment spring 27 is provided in the slide 26. The upper end of the adjustment spring 27 rests on the sliding sleeve 24, and the lower end rests on the pressure plate 29. The pressure plate 29 is provided with a balancing hole 28 for connecting the inside and outside of the slide 26.

[0029] When heating tube 18 is in operation, it heats the thermal oil in main oil chamber 17. The heat expands the thermal oil in main oil chamber 17 and enters auxiliary oil chamber 33 through oil hole 21. This pushes downward on sleeve 24, compressing adjustment spring 27 and increasing the volume of auxiliary oil chamber 33. This compensates for the volume change of the thermal oil in main oil chamber 17 and prevents damage to inner tank 7 or outer tank 4. Since the thermal oil in both main oil chamber 17 and auxiliary oil chamber 33 is shielded from the outside atmosphere, deterioration due to oxidation or absorption of water vapor is prevented, thereby extending the service life of the thermal oil. The number of adjustment units 1 can be set based on the volume of main oil chamber 17 and auxiliary oil chamber 33, as well as the temperature of the thermal oil.

[0030] A sealing bladder 23 is housed within the auxiliary oil chamber 33. This bladder 23 is in the shape of an inverted cylinder with corrugated sidewalls. Made of rubber, it covers the sliding sleeve 24. A pressure ring 24 is located at the bottom of the bladder 23. Bolts between the sliding seat 26 and the expansion tank 22 secure the edge of the bladder 23 to the bottom of the expansion tank 22. The sealing bladder 23 separates the sliding sleeve 24 from the thermal oil, providing an additional seal and improving reliability, preventing thermal oil leakage.

[0031] The outer tank 4 is further coated with a heat-insulating material 3 , and the heat-insulating material 3 is coated with a cover plate 2 .

[0032] Example 2

[0033] The difference between this embodiment and embodiment 1 is that:

[0034] A circulation pipe 13 is connected between the top and bottom of the main oil chamber 17. An oil pump 16 is installed on the circulation pipe 13. Driven by the oil pump 16, the heat transfer oil flows from top to bottom within the circulation pipe 13. A spiral guide plate 5 is installed between the side walls of the inner tank 7 and the outer tank 4. The inner tank 7 and the outer tank 4 are both welded to the guide plate 5.

[0035] When the oil pump 16 is running, the heat transfer oil at the bottom of the main oil chamber 17 flows upward through the flow channel 6 formed between the guide plates 5, thereby uniformly heating the inner tank 7 and preventing excessive temperature differences between different parts of the inner tank 7, which in turn leads to uneven reaction.

[0036] Example 3

[0037] Combine Figure 4 As shown, the difference between this embodiment and embodiment 2 is that:

[0038] The drive shaft of the agitator 11 is inserted downward into the interior of the inner tank 7. The agitator impeller 15 on the drive shaft comprises two layers. A balancing ring 14 is located between the two layers of agitator impellers 15, near the bottom of the inner tank 7. The balancing ring 14 comprises two symmetrical halves, each consisting of a jacket 31 that buckles onto the drive shaft and a half-ring 30 positioned outside the jacket 31. Spokes 32 are fixedly connected between the half-rings 30 and the corresponding jacket 31. The two half-rings 30 are interconnected and clamped to the outside of the drive shaft. One of the jackets 31 is provided with a pin that radially inserts into the drive shaft.

[0039] When the agitator shaft is too long, its rigidity will deteriorate, the agitator wheel 15 will swing, and the agitator shaft will also shake, thereby affecting the service life of the agitator bearings and other transmission components. After the balance ring 14 is set, most of the mass of the balance ring 14 is distributed on the half ring 30. The balance ring 14 rotates under the drive shaft. Due to the gyroscopic effect, the drive shaft tends to maintain the original axis when rotating, thereby reducing the shaking of the drive shaft and extending the service life of the agitator. The balance ring 14 is divided into two detachable parts, so that when it is connected to the drive shaft, it does not need to pass through one end of the drive shaft. The balance ring 14 can be installed after the agitator wheel 15 is installed, which makes the installation of the balance ring 14 more convenient.

[0040] The above-mentioned embodiments are described in a relatively detailed and specific manner, expressing preferred embodiments of the present invention. They are only used to illustrate the technical ideas and features of the present invention. Their purpose is to enable those skilled in the art to understand the contents of the present invention and implement them accordingly. However, they are not limited to the present invention alone, and the patent scope of the present invention cannot be limited solely by these embodiments. That is, any equivalent changes or modifications made to the spirit disclosed by the present invention, for researchers or technicians in this field, without departing from the structure of the present invention, local improvements within the system and changes and conversions between subsystems, etc., are still within the patent scope of the present invention.

Claims

1. A reactor comprising a vertical inner tank (7), a tank cover (9) covering the top of the inner tank (7), an agitator (11) arranged on the top of the tank cover (9), a material injection pipe (10) arranged on the tank cover (9), and a material discharge pipe (19) arranged at the bottom of the inner tank (7), characterized in that: The inner tank (7) is covered with an outer tank (4), and the inner tank (7) and the outer tank (4) are fixedly connected. A closed main oil chamber (17) is located between the inner tank (7) and the outer tank (4). The main oil chamber (17) is filled with heat-conducting oil. A heating pipe (18) for heating the heat-conducting oil is fixedly provided on the outer tank (4). An expansion oil tank (22) is fixedly connected to the outer tank (4). The interior of the expansion oil tank (22) is an auxiliary oil chamber (33). The auxiliary oil chamber (33) is communicated with the main oil chamber (17). A sliding sleeve (24) for adjusting the volume of the auxiliary oil chamber (33) is provided on the expansion oil tank (22).

2. A reactor according to claim 1, characterized in that: A sliding seat (26) is fixedly connected to the side of the expansion oil tank (22) away from the outer tank (4); the sliding sleeve (24) is convex-shaped; a portion of the sliding sleeve (24) with a larger diameter is slidably connected to the sliding seat (26); an end of the sliding sleeve (24) with a smaller diameter extends into the auxiliary oil chamber (33); and the sliding sleeve (24) and the sliding seat (26) are sealed.

3. A reactor according to claim 2, characterized in that: A pressure plate (29) is fixedly connected to the side of the slide (26) away from the expansion tank (22). An adjusting spring (27) is provided in the slide (26). One end of the adjusting spring (27) abuts against the sliding sleeve (24), and the other end abuts against the pressure plate (29). A balancing hole (28) is provided on the pressure plate (29) for connecting the inside and outside of the slide (26).

4. A reactor according to claim 2, characterized in that: A flexible sealing bag (23) fixedly connected to the expansion oil tank (22) is provided in the auxiliary oil chamber (33), and the sealing bag (23) is covered outside the sliding sleeve (24).

5. A reactor according to claim 1, characterized in that: A circulation pipe (13) is connected between the top and bottom of the main oil chamber (17). An oil pump (16) is provided on the circulation pipe (13). Driven by the oil pump (16), the heat transfer oil flows from top to bottom in the circulation pipe (13).

6. A reactor according to claim 5, characterized in that: A spiral guide plate (5) is provided between the side wall of the inner tank (7) and the side wall of the outer tank (4), and both the inner tank (7) and the outer tank (4) are fixedly connected to the guide plate (5).

7. A reactor according to claim 1, characterized in that: The transmission shaft of the stirrer (11) is inserted downward into the interior of the inner tank (7), and a balancing ring (14) is fixedly connected to the transmission shaft, and the balancing ring (14) is close to the lower part of the inner tank (7).

8. A reactor according to claim 7, characterized in that: The balancing ring (14) comprises two symmetrically arranged halves, each of which comprises a jacket (31) buckled on the transmission shaft and a half ring (30) arranged outside the jacket (31), a spoke (32) being fixedly connected between the half ring (30) and the corresponding jacket (31), the half rings (30) of the two halves being connected to each other and clamped outside the transmission shaft, a pin being provided on one of the jackets (31), and the pin being inserted into the transmission shaft in the radial direction.

Images