Reaction kettle for preparing dichlorofluoroethane from vinylidene chloride

Abstract

The invention belongs to the field of vinylidene chloride preparation, particularly relates to a reaction kettle for preparing dichlorofluoroethane from vinylidene chloride, and provides the following scheme aiming at the problems that vinylidene chloride and anhydrous hydrogen fluoride are inconvenient to fully and uniformly mix and the reaction effect is poor in the prior art: the reaction kettle comprises a reaction kettle body; the two supporting plates are fixedly mounted at the top of the reaction kettle body; the two quantitative boxes are fixedly mounted on the two supporting plates; the two hollow plates are fixedly mounted on the inner wall of the top of the reaction kettle body, and a plurality of liquid spraying holes are formed in one sides of the two hollow plates; the two conveying pumps are fixedly mounted at the bottoms of the two quantitative boxes, vinylidene chloride and anhydrous hydrogen fluoride can be subjected to dispersion, hedging and primary mixing, then stirring blades reciprocate up and down and rotate forwards and backwards, the vinylidene chloride and the anhydrous hydrogen fluoride are mixed again, and the mixing efficiency is improved. The vinylidene chloride and the anhydrous hydrogen fluoride are fully and uniformly mixed.

Description

Technical Field

[0001] The invention relates to the technical field of vinylidene chloride preparation, in particular to a reaction kettle for preparing monofluorodichloroethane from vinylidene chloride. Background Art

[0002] Dichloromonofluoroethane is a high-purity liquid widely used in cleaning and solvent applications. Due to its minimal impact on the ozone layer, it is designated as an ideal replacement for fully halogenated chlorofluorocarbons (CFCs) and enjoys significant market demand. Dichloromonofluoroethane is synthesized via an addition reaction using vinylidene chloride and anhydrous hydrogen fluoride as raw materials.

[0003] In the prior art, it is not convenient to fully and evenly mix vinylidene chloride and anhydrous hydrogen fluoride, resulting in poor reaction effect. Therefore, we propose a reactor for preparing monofluorodichloroethane from vinylidene chloride to solve the above problem. Summary of the Invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art that it is inconvenient to fully and evenly mix vinylidene chloride and anhydrous hydrogen fluoride, resulting in poor reaction effect, and to propose a reactor for preparing monofluorodichloroethane from vinylidene chloride.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A reactor for preparing monofluorodichloroethane from vinylidene chloride, comprising:

[0007] Reactor body;

[0008] Two support plates are fixedly mounted on the top of the reactor body;

[0009] Two quantitative boxes, fixedly installed on two support plates;

[0010] Two hollow plates are fixedly mounted on the top inner wall of the reactor body, and a plurality of liquid spray holes are opened on one side of the two hollow plates;

[0011] Two delivery pumps are fixedly installed at the bottom of the two quantitative boxes; the liquid outlets of the two delivery pumps are fixedly connected to one end of the delivery pipe, and the other ends of the two delivery pipes are fixedly connected to the two hollow plates respectively, and the delivery pipes are provided with solenoid valves;

[0012] The up and down reciprocating stirring mechanism is provided on the reactor body;

[0013] The quantitative mechanism is arranged on the quantitative box;

[0014] The raw material conveying mechanism is arranged on the reactor body and is used to convey the raw materials into the quantitative box.

[0015] Preferably, the up and down reciprocating stirring mechanism includes a stirring rod, a circular hole is opened on the top of the reactor body, the stirring rod is movably installed in the circular hole, and a plurality of stirring blades are fixedly installed on the outer side of the stirring rod.

[0016] Preferably, a slide rail is fixedly installed on one side of each support plate, a slider is slidably installed on the slide rail, a lifting box is fixedly installed on the slider, a bearing is fixedly installed on the bottom of the lifting box, and the outer side of the stirring rod is fixedly connected to the inner ring of the bearing.

[0017] Preferably, the top end of the stirring rod extends into the lifting box and is fixedly installed with a second bevel gear. A cross bar is rotatably installed in the lifting box. The outer side of the cross bar is fixedly sleeved with a first bevel gear, and the first bevel gear is meshed with the second bevel gear. A gear is fixedly installed at one end of the cross bar, and a mounting groove is opened on one side of the support plate. A rack is fixedly installed in the mounting groove, and the gear is meshed with the rack.

[0018] Preferably, a motor is fixedly installed on one side of the quantitative box, the output shaft of the motor is fixedly installed on the center of the circular plate, a rotating block is fixedly installed on one end of the circular plate, a transmission rod is rotatably installed on the rotating block, and the bottom end of the transmission rod is rotatably connected to the top of the lifting box.

[0019] Preferably, the quantitative mechanism includes a partition slidably installed in the quantitative box, with an overflow hole provided on the partition. The partition divides the space in the quantitative box into a quantitative area and a reflux area, and the liquid inlet of the delivery pump is connected to the quantitative area.

[0020] Preferably, a top cover is fixedly installed on the top of the two quantitative boxes, a movable groove is opened at the bottom of the top cover, a movable block is slidably installed in the movable groove, the bottom of the movable block is fixedly connected to the top of the partition, a screw is rotatably installed in the movable groove, the screw is threadedly connected to the movable block, a servo motor is fixedly installed on one side of the top cover, and the output shaft of the servo motor is fixedly connected to one end of the screw.

[0021] Preferably, the raw material conveying mechanism includes two storage boxes fixedly installed on the outside of the reactor body, the top of the two storage boxes are provided with a liquid replenishing port, the top of the two storage boxes are fixedly connected to a transparent reflux pipe, and the top of the two transparent reflux pipes are respectively connected to the reflux areas of the two quantitative boxes.

[0022] Preferably, a transfer pump is fixedly installed on the top of the two storage boxes, the liquid inlets of the two transfer pumps are fixedly connected to the liquid extraction pipe, the liquid outlets of the two transfer pumps are fixedly connected to the connecting pipe, and one end of the two connecting pipes is fixedly connected to the two top covers respectively.

[0023] Preferably, a bracket is fixedly installed on the outer side of the reactor body, and a discharge pipe is fixedly connected to the bottom of the reactor body, and a valve is provided on the discharge pipe.

[0024] In the present invention, the beneficial effects of the reactor for preparing monofluorodichloroethane from vinylidene chloride are as follows:

[0025] Vinylidene chloride and anhydrous hydrogen fluoride are extracted through two liquid extraction pipes. Vinylidene chloride and anhydrous hydrogen fluoride enter the quantitative areas of the two quantitative boxes through two connecting pipes. Excess vinylidene chloride and anhydrous hydrogen fluoride flow from two overflow holes into two reflux areas and finally flow back to the two storage boxes through two transparent reflux pipes. When liquid flow is observed in the transparent reflux pipes, the transfer pump is turned off.

[0026] Two delivery pumps are started, and the solenoid valves are opened to extract vinylidene chloride and anhydrous hydrogen fluoride from the two quantitative zones. The vinylidene chloride and anhydrous hydrogen fluoride are transported through two delivery pipes and transported into two hollow plates. Finally, the vinylidene chloride and anhydrous hydrogen fluoride are sprayed out through multiple spray holes, making the vinylidene chloride and anhydrous hydrogen fluoride more dispersed. The sprayed vinylidene chloride and anhydrous hydrogen fluoride offset each other for preliminary mixing.

[0027] The stirring blades move up and down and rotate forward and backward to mix the vinylidene chloride and anhydrous hydrogen fluoride again, so that the vinylidene chloride and anhydrous hydrogen fluoride are fully and evenly mixed;

[0028] The present invention can disperse and offset vinylidene chloride and anhydrous hydrogen fluoride, perform preliminary mixing, and then re-mix the vinylidene chloride and anhydrous hydrogen fluoride by moving the stirring blades up and down and rotating forward and backward, so that the vinylidene chloride and anhydrous hydrogen fluoride are fully and evenly mixed. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic structural diagram of a reactor for preparing monofluorodichloroethane from vinylidene chloride proposed in the present invention;

[0030] Figure 2 This is a partial structural schematic diagram of a reaction kettle for preparing monofluorodichloroethane from vinylidene chloride proposed in the present invention;

[0031] Figure 3 The present invention provides a reactor for preparing fluorodichloroethane from vinylidene chloride Figure 2 Schematic diagram of the enlarged structure of part A;

[0032] Figure 4 The present invention provides a reactor for preparing fluorodichloroethane from vinylidene chloride Figure 2 Schematic diagram of the enlarged structure of part B;

[0033] Figure 5 The diagram is a side structural diagram of a circular plate and a rotating block of a reactor for preparing monofluorodichloroethane from vinylidene chloride proposed by the present invention.

[0034] In the figure: 1, bracket; 2, reactor body; 3, discharge pipe; 4, support plate; 5, quantitative box; 6, top cover; 7, delivery pump; 8, delivery pipe; 9, hollow plate; 10, spray hole; 11, solenoid valve; 12, storage box; 13, delivery pump; 14, extraction pipe; 15, connecting pipe; 16, partition; 17, overflow hole; 18, transparent reflux pipe; 19, lifting box; 20, stirring rod; 21, Stirring blade; 22. Second bevel gear; 23. Cross bar; 24. First bevel gear; 25. Gear; 26. Mounting slot; 27. Rack; 28. Motor; 29. ​​Circular plate; 30. Rotating block; 31. Transmission rod; 32. Moving slot; 33. Moving block; 34. Screw; 35. Servo motor; 36. Circular hole; 37. Valve; 38. Fluid filling port; 39. Bearing; 40. Slider; 41. Slide rail. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0036] Example 1

[0037] Reference Figure 1-Figure 5 A reactor for preparing monofluorodichloroethane from vinylidene chloride, comprising:

[0038] Reactor body 2;

[0039] Two support plates 4 are fixedly mounted on the top of the reactor body 2;

[0040] Two quantitative boxes 5 are fixedly mounted on two support plates 4;

[0041] Two hollow plates 9 are fixedly mounted on the top inner wall of the reactor body 2. A plurality of liquid spray holes 10 are opened on one side of the two hollow plates 9;

[0042] Two delivery pumps 7 are fixedly installed at the bottom of the two quantitative boxes 5; the liquid outlets of the two delivery pumps 7 are fixedly connected to one end of the delivery pipe 8, and the other ends of the two delivery pipes 8 are fixedly connected to the two hollow plates 9 respectively. The delivery pipe 8 is provided with a solenoid valve 11;

[0043] The up and down reciprocating stirring mechanism is provided on the reactor body 2;

[0044] The quantitative mechanism is provided on the quantitative box 5;

[0045] The raw material conveying mechanism is provided on the reactor body 2 and is used to convey the raw materials into the quantitative box 5 .

[0046] In this embodiment, the up and down reciprocating stirring mechanism includes a stirring rod 20 . A circular hole 36 is opened on the top of the reactor body 2 . The stirring rod 20 is movably installed in the circular hole 36 . A plurality of stirring blades 21 are fixedly installed on the outer side of the stirring rod 20 .

[0047] In this embodiment, a slide rail 41 is fixedly installed on one side of each support plate 4, a slider 40 is slidably installed on the slide rail 41, a lifting box 19 is fixedly installed on the slider 40, a bearing 39 is fixedly installed on the bottom of the lifting box 19, and the outer side of the stirring rod 20 is fixedly connected to the inner ring of the bearing 39.

[0048] In this embodiment, the top end of the stirring rod 20 extends into the lifting box 19 and is fixedly installed with a second bevel gear 22. A cross bar 23 is rotatably installed in the lifting box 19. A first bevel gear 24 is fixedly sleeved on the outer side of the cross bar 23. The first bevel gear 24 is engaged with the second bevel gear 22. A gear 25 is fixedly installed at one end of the cross bar 23. A mounting groove 26 is opened on one side of the support plate 4. A rack 27 is fixedly installed in the mounting groove 26, and the gear 25 is engaged with the rack 27.

[0049] In this embodiment, a motor 28 is fixedly installed on one side of the metering box 5, and the output shaft of the motor 28 is fixedly installed on the center of the circular plate 29. A rotating block 30 is fixedly installed on one end of the circular plate 29, and a transmission rod 31 is rotatably installed on the rotating block 30. The bottom end of the transmission rod 31 is rotatably connected to the top of the lifting box 19.

[0050] In this embodiment, the quantitative mechanism includes a partition 16 slidably installed in the quantitative box 5, and an overflow hole 17 is provided on the partition 16. The partition 16 divides the space in the quantitative box 5 into a quantitative area and a reflux area. The liquid inlet of the delivery pump 7 is connected to the quantitative area.

[0051] In this embodiment, a top cover 6 is fixedly installed on the top of the two quantitative boxes 5, and a movable groove 32 is opened at the bottom of the top cover 6. A movable block 33 is slidably installed in the movable groove 32, and the bottom of the movable block 33 is fixedly connected to the top of the partition 16. A screw 34 is rotatably installed in the movable groove 32, and the screw 34 is threadedly connected to the movable block 33. A servo motor 35 is fixedly installed on one side of the top cover 6, and the output shaft of the servo motor 35 is fixedly connected to one end of the screw 34. The screw 34 is driven to rotate by the servo motor 35, so that the movable block 33 threadedly connected to the screw 34 moves horizontally, driving the partition 16 to move horizontally, and then the size of the quantitative area is adjusted to meet different needs.

[0052] In this embodiment, the raw material conveying mechanism includes two storage boxes 12 fixedly installed on the outside of the reactor body 2, and the top of the two storage boxes 12 is provided with a liquid replenishing port 38. The top of the two storage boxes 12 is fixedly connected to a transparent reflux pipe 18, and the top ends of the two transparent reflux pipes 18 are respectively connected to the reflux areas of the two quantitative boxes 5.

[0053] In this embodiment, a transfer pump 13 is fixedly installed on the top of the two storage boxes 12, the liquid inlets of the two transfer pumps 13 are fixedly connected to the liquid extraction pipe 14, and the liquid outlets of the two transfer pumps 13 are fixedly connected to the connecting pipe 15, and one end of the two connecting pipes 15 is fixedly connected to the two top covers 6 respectively.

[0054] In this embodiment, a bracket 1 is fixedly installed on the outer side of the reactor body 2 , and a discharge pipe 3 is fixedly connected to the bottom of the reactor body 2 . A valve 37 is provided on the discharge pipe 3 .

[0055] In this embodiment, when in use, vinylidene chloride and anhydrous hydrogen fluoride are added to the two storage boxes 12 from the two liquid replenishing ports 38, the two delivery pumps 13 are started, and the vinylidene chloride and anhydrous hydrogen fluoride are extracted through the two liquid extraction pipes 14. The vinylidene chloride and anhydrous hydrogen fluoride enter the quantitative areas in the two quantitative boxes 5 through the two connecting pipes 15. The excess vinylidene chloride and anhydrous hydrogen fluoride flow into the two reflux areas from the two overflow holes 17, and finally flow back to the two storage boxes 12 from the two transparent reflux pipes 18. When liquid flow is observed in the transparent reflux pipes 18, the delivery pump 13 is closed, the two delivery pumps 7 are started, the solenoid valve 11 is opened, the vinylidene chloride and anhydrous hydrogen fluoride in the two quantitative areas are extracted, and the vinylidene chloride and anhydrous hydrogen fluoride are transported through the two delivery pipes 8, and the vinylidene chloride and anhydrous hydrogen fluoride are transported to the two hollow plates 9. Finally, the vinylidene chloride and anhydrous hydrogen fluoride are sprayed out through the multiple spray holes 10, so that the vinylidene chloride Ethylene and anhydrous hydrogen fluoride are more dispersed, and the ejected vinylidene chloride and anhydrous hydrogen fluoride offset each other for preliminary mixing. At the same time, the circular plate 29 is driven to rotate by the motor 28, and the circular plate 29 drives the rotating block 30 to move eccentrically. The rotating block 30 drives the transmission rod 31 to move, and the transmission rod 31 drives the lifting box 19 to move back and forth vertically. The lifting box 19 drives the stirring rod 20 to move back and forth vertically, and then drives the stirring blade 21 to move back and forth vertically. At the same time, when the lifting box 19 moves vertically, the gear 25 rolls on the rack 27, which can rotate the crossbar 23. The crossbar 23 drives the first bevel gear 24 to rotate, and the first bevel gear 24 drives the second bevel gear 22 to rotate. The second bevel gear 22 drives the stirring rod 20 to rotate, and then drives the stirring blade 21 to rotate. The stirring blade 21 reciprocates up and down and rotates forward and backward, so that the vinylidene chloride and anhydrous hydrogen fluoride are mixed again, so that the vinylidene chloride and anhydrous hydrogen fluoride are fully and evenly mixed.

[0056] Example 2

[0057] The difference between this embodiment and the first embodiment is that liquid level sensors are provided in both storage boxes 12 to monitor the amount of stored raw materials.

[0058] The rest is the same as that of the first embodiment.

[0059] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A reactor for preparing monofluorodichloroethane from vinylidene chloride, characterized in that: include: Reactor body (2); Two support plates (4) are fixedly mounted on the top of the reactor body (2); Two quantitative boxes (5) are fixedly mounted on two support plates (4); Two hollow plates (9) are fixedly mounted on the top inner wall of the reactor body (2), and a plurality of liquid spray holes (10) are opened on one side of the two hollow plates (9); Two delivery pumps (7) are fixedly installed at the bottom of the two quantitative boxes (5); the liquid outlets of the two delivery pumps (7) are fixedly connected to one end of the delivery pipe (8), and the other ends of the two delivery pipes (8) are fixedly connected to the two hollow plates (9) respectively, and the delivery pipes (8) are provided with electromagnetic valves (11); An up and down reciprocating stirring mechanism is provided on the reactor body (2); A quantitative mechanism is provided on the quantitative box (5); The raw material conveying mechanism is provided on the reactor body (2) and is used for conveying the raw materials into the quantitative box (5).

2. The reactor for preparing fluorodichloroethane from vinylidene chloride according to claim 1, characterized in that: The up-and-down reciprocating stirring mechanism comprises a stirring rod (20). A circular hole (36) is provided on the top of the reactor body (2). The stirring rod (20) is movably mounted in the circular hole (36). A plurality of stirring blades (21) are fixedly mounted on the outer side of the stirring rod (20).

3. The reactor for preparing fluorodichloroethane from vinylidene chloride according to claim 2, characterized in that: A slide rail (41) is fixedly mounted on one side of each of the two support plates (4), a slider (40) is slidably mounted on the slide rail (41), a lifting box (19) is fixedly mounted on the slider (40), a bearing (39) is fixedly mounted on the bottom of the lifting box (19), and the outer side of the stirring rod (20) is fixedly connected to the inner ring of the bearing (39).

4. The reactor for preparing monofluorodichloroethane from vinylidene chloride according to claim 3, characterized in that: The top end of the stirring rod (20) extends into the lifting box (19) and is fixedly installed with a second bevel gear (22). A crossbar (23) is rotatably installed in the lifting box (19). A first bevel gear (24) is fixedly sleeved on the outer side of the crossbar (23). The first bevel gear (24) is meshed with the second bevel gear (22). A gear (25) is fixedly installed at one end of the crossbar (23). A mounting groove (26) is opened on one side of the support plate (4). A rack (27) is fixedly installed in the mounting groove (26). The gear (25) is meshed with the rack (27).

5. The reaction kettle for preparing monofluorodichloroethane from vinylidene chloride according to claim 4, characterized in that: A motor (28) is fixedly mounted on one side of the quantitative box (5), an output shaft of the motor (28) is fixedly mounted on the center of a circular plate (29), a rotating block (30) is fixedly mounted on one end of the circular plate (29), a transmission rod (31) is rotatably mounted on the rotating block (30), and the bottom end of the transmission rod (31) is rotatably connected to the top of the lifting box (19).

6. The reaction kettle for preparing monofluorodichloroethane from vinylidene chloride according to claim 5, characterized in that: The quantitative mechanism comprises a partition (16) slidably mounted in the quantitative box (5), the partition (16) being provided with an overflow hole (17), the partition (16) dividing the space in the quantitative box (5) into a quantitative area and a reflux area, and the liquid inlet of the delivery pump (7) is connected to the quantitative area.

7. The reactor for preparing monofluorodichloroethane from vinylidene chloride according to claim 6, characterized in that: A top cover (6) is fixedly installed on the top of each of the two quantitative boxes (5), a movable groove (32) is provided at the bottom of the top cover (6), a movable block (33) is slidably installed in the movable groove (32), the bottom of the movable block (33) is fixedly connected to the top of the partition (16), a screw (34) is rotatably installed in the movable groove (32), the screw (34) is threadedly connected to the movable block (33), a servo motor (35) is fixedly installed on one side of the top cover (6), and an output shaft of the servo motor (35) is fixedly connected to one end of the screw (34).

8. The reactor for preparing monofluorodichloroethane from vinylidene chloride according to claim 7, characterized in that: The raw material conveying mechanism comprises two storage boxes (12) fixedly mounted on the outside of the reactor body (2), the tops of the two storage boxes (12) are each provided with a liquid replenishing port (38), the tops of the two storage boxes (12) are each fixedly connected to a transparent reflux pipe (18), and the top ends of the two transparent reflux pipes (18) are respectively connected to the reflux areas of the two quantitative boxes (5).

9. The reaction kettle for preparing monofluorodichloroethane from vinylidene chloride according to claim 8, characterized in that: A transfer pump (13) is fixedly installed on the top of each of the two storage boxes (12), the liquid inlets of each of the two transfer pumps (13) are fixedly connected to a liquid extraction pipe (14), the liquid outlets of each of the two transfer pumps (13) are fixedly connected to a connecting pipe (15), and one end of each of the two connecting pipes (15) is fixedly connected to the two top covers (6), respectively.

10. The reaction kettle for preparing monofluorodichloroethane from vinylidene chloride according to claim 9, characterized in that: A bracket (1) is fixedly mounted on the outside of the reactor body (2), and a discharge pipe (3) is fixedly connected to the bottom of the reactor body (2), and a valve (37) is provided on the discharge pipe (3).

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