Styrene Reactor

Abstract

The present invention relates to styrene production equipment, in particular to a styrene reaction kettle. It includes a cylinder body and a blocker. A plurality of positive rotation blades and reverse rotation blades with opposite rotation directions are arranged on the stirring shaft. The positive rotation blades and the reverse rotation blades are fixedly connected and rotationally connected to the stirring shaft in the circumferential direction respectively. The positive rotation blades and the reverse rotation blades are arranged in layers at intervals from bottom to top. The top reverse rotation blade is driven by a rotating sleeve sleeved on the upper end of the stirring shaft. The adjacent two layers of reverse rotation blades are driven by a horizontal "Ji"-shaped transmission rod. The blocker is multiple layers, and each layer of blocker is located between the adjacent positive rotation blade and reverse rotation blade. The blocker is a multi-stage telescopic structure, and the first-stage blocker of each layer is provided with a water inlet pipe and a water return pipe. The positive rotation blades and the reverse rotation blades of the present invention rotate in opposite directions, greatly improving the stirring effect; during the material reaction process in the styrene reaction kettle, when rapid heating is required, the blocker extends into the cylinder body, and the temperature rises rapidly, greatly improving the reaction effect.

Description

Technical Field

[0001] The present invention relates to styrene production equipment, in particular to a styrene reaction kettle. Background Art

[0002] As a typical main reaction equipment in chemical production, a reaction kettle disperses and mixes various materials through stirring, heating, and cooling, so as to carry out reaction polymerization, etc. When a reaction occurs in the reaction kettle, the stirring shaft drives the stirring blades to rotate, so that the reaction materials are fully mixed. At present, the rotation direction of the stirring blades of the stirring shaft is single, and the mixing effect is poor; the heat exchange effect of heating and cooling the liquid in the reaction kettle is poor, which affects the reaction effect of the reaction materials.

[0003] The Chinese invention patent with the authorization announcement number CN214598893U discloses a high-pressure reaction kettle for the synthesis of a covalent organic framework mixed matrix membrane. This invention uses two stirring shafts for stirring, and the cost is high.

[0004] The Chinese invention patent with the authorization announcement number CN213590442U discloses a heat dissipation device for a chemical reaction kettle. This invention is provided with a spiral cooling liquid pipe inside the inner shell of the reaction kettle. The spiral cooling pipe of this invention occupies the internal space of the reaction kettle, and it is very difficult to clean the spiral cooling liquid pipe, and the cooling effect is poor after long-term use. Summary of the Invention

[0005] The present invention aims to solve the above technical problems, and provides a styrene reaction kettle, which improves the mixing effect and heat exchange effect and improves the productivity.

[0006] The technical solution adopted by the present invention to solve its technical problems is:

[0007] A styrene reaction kettle includes a cylinder body, a lower head, an upper cover, and a stirring shaft. The stirring shaft is placed inside the cylinder body. The inner cylinder wall of the cylinder body is provided with a radial blocker. The stirring shaft is provided with multiple layers of forward rotating blades and reverse rotating blades with opposite rotation directions. The forward rotating blades and the reverse rotating blades are respectively fixedly connected and rotationally connected to the stirring shaft in the circumferential direction. The forward rotating blades and the reverse rotating blades are arranged in layers at intervals from bottom to top. The top reverse rotating blade is driven by a rotating sleeve sleeved on the upper end of the stirring shaft. The rotating sleeve and the stirring shaft are driven by a driving mechanism and rotate in opposite directions; the adjacent two layers of reverse rotating blades are driven by a horizontal "J"-shaped transmission rod. The forward rotating blade rotates through the horizontal frame gap of the transmission rod; the blocker is multiple layers, and each layer of blocker is located between adjacent forward rotating blades and reverse rotating blades. The blocker is a multi-stage telescopic structure. The first-stage blocker and the last-stage blocker are driven by a driving part. The first-stage blocker of each layer is installed with a water inlet pipe and a water return pipe.

[0008] Compared with the prior art, the present invention adopting the above technical solution has the beneficial effects that:

[0009] The positive rotation propeller blade is driven by the stirring shaft to rotate clockwise, and the reverse rotation propeller blade is driven by the rotating sleeve and the transmission rod to rotate counterclockwise. The positive rotation propeller blade and the reverse rotation propeller blade rotate in opposite directions, greatly improving the stirring effect; during the material reaction process in the styrene reactor, when rapid heating is required, the blocker extends into the cylinder body, and the inner end of the last-stage blocker is close to the stirring shaft, so the temperature rises rapidly, greatly improving the reaction effect. During the process of the blocker extending into the cylinder body, the positive rotation propeller blade and the reverse rotation propeller blade stir normally, greatly improving the production efficiency; the positive rotation propeller blade and the reverse rotation propeller blade are located on the same stirring shaft, and the structure is simple.

[0010] Furthermore, the optimization scheme of the present invention is:

[0011] The lower end of the rotating sleeve extends into the cylinder body. The upper end of the connecting rod is fixedly connected to the lower end of the rotating sleeve. The lower end of the connecting rod is connected to the top-layer bearing seat through the connecting plate, and the bearing seat is rotatably connected to the stirring shaft. The reverse rotation propeller blade is installed on the bearing seat.

[0012] The upper vertical part of the transmission rod is fixedly connected to the lower connecting plate. The lower connecting plate is axially fixedly connected to the lower end face of the bearing seat on the upper layer of the transmission rod. The lower vertical part of the transmission rod is fixedly connected to the upper connecting plate, and the upper connecting plate is axially fixedly connected to the upper end face of the bearing seat on the lower layer of the transmission rod.

[0013] The water inlet pipes of the first-stage blockers on the same layer are connected in parallel, and the water return pipes of the first-stage blockers on the same layer are connected in parallel.

[0014] The transmission rod is a welded member of a strip-shaped plate. Description of the Drawings

[0015] Figure 1 is the overall structural schematic diagram of the embodiment of the present invention;

[0016] Figure 2 is the connection schematic diagram of the stirring shaft, the positive rotation propeller blade and the reverse rotation propeller blade of the embodiment of the present invention;

[0017] Figure 3 is the connection schematic diagram of the stirring shaft and the positive rotation propeller blade of the embodiment of the present invention;

[0018] Figure 4 is Figure 3 the top view of;

[0019] Figure 5 is the connection schematic diagram of the stirring shaft and the reverse rotation propeller blade of the embodiment of the present invention;

[0020] Figure 6 is Figure 5 the top view of;

[0021] Figure 7 is the connection schematic diagram of the stirring shaft, the rotating sleeve and the driving mechanism of the embodiment of the present invention;

[0022] Figure 8 is the front view of the transmission rod according to an embodiment of the present invention;

[0023] Figure 9 is Figure 8 the top view of;

[0024] Figure 10 is the top view of the stopper according to an embodiment of the present invention;

[0025] Figure 11 is the connection schematic diagram of the stoppers at all levels according to an embodiment of the present invention;

[0026] Figure 12 is the retraction schematic diagram of the stopper according to an embodiment of the present invention;

[0027] Figure 13 is the extension schematic diagram of the stopper according to an embodiment of the present invention.

[0028] In the figure: lower head 1; cylinder body 2; upper cover 3; fixed ring 3-1; rotary seal 3-2; stirring shaft 4; stirring blade 5; positive rotation blade 5-1; reverse rotation blade 5-2; semi-circular sleeve 6; ear plate 7; key 8; positioning screw 9; bearing seat 10; connecting plate 11; bearing 12; spacer ring 13; gland 14; sealing ring 15; shaft snap ring 16; hole snap ring 17; coupling 18; reducer 19; first output shaft 19-1; second output shaft 19-2; bracket 19-3; motor 20; rotating sleeve 21; sealing cover 21-1; shaft collar 21-2; driven gear 22; driving gear 23; transmission rod 24; connecting rod 24-1; upper connecting plate 24-2; lower connecting plate 24-3; stopper 25; primary stopper 25-1; secondary stopper 25-2; tertiary stopper 25-3; sealing ring 25-4; positioning strip 25-5; positioning frame 25-6; outer end plate 25-7; inner end plate 25-8; cylinder 26; cylinder body 26-1; piston rod 26-2; connecting block 26-3; bracket 27; O-ring 28; elastic scraper 29; water inlet pipe 30; water return pipe 31; fin 32; elastic scraper 33. Detailed implementation manners

[0029] The present invention will be further described in detail below with reference to the drawings and embodiments.

[0030] Referring to Figure 1 , this embodiment is a styrene reactor. The reactor is composed of a lower head 1, a cylinder body 2, an upper cover 3, a stirring shaft 4, a stirring blade 5, etc. The lower head 1 and the upper cover 3 are respectively detachably connected to the cylinder body 2. The stirring shaft 4 is vertically placed inside the cylinder body 2. The upper end of the stirring shaft 4 extends out of the central hole of the upper cover 3, and the fixed ring 3-1 is welded to the central hole.

[0031] Six layers of radial stirring blades 5 are installed on the stirring shaft 4 ( Figures 2 - 6As shown in the figure, two or four radial stirring blades 5 are symmetrically installed on each layer. The stirring blades 5 are divided into forward rotation blades 5-1 and reverse rotation blades 5-2. The forward rotation blades 5-1 and the reverse rotation blades 5-2 are arranged in alternating layers. The first, third, and fifth layers from bottom to top are all forward rotation blades 5-1, and the second, fourth, and sixth layers are all reverse rotation blades 5-2. The forward rotation blade 5-1 is connected to the stirring shaft 4 through a semi-circular sleeve 6. The inner end of the forward rotation blade 5-1 is welded to the outer arc surface of the semi-circular sleeve 6. Radial ear plates 7 are welded to the outer arc surface of the open end of the semi-circular sleeve 6. The semi-circular sleeve 6 is connected to the stirring shaft 4 through a key 8. Two semi-circular sleeves 6 are symmetrically buckled on the stirring shaft 4. The two semi-circular sleeves 6 are connected through ear plates 7 and bolts. A radial positioning screw 9 is installed between the semi-circular sleeve 6 and the stirring shaft 4.

[0032] The reverse rotation blade 5-2 is connected to the stirring shaft 4 through a bearing seat 10. Radial connecting plates 11 are symmetrically welded to the outer circumferential surface of the bearing seat 10. The inner end of the reverse rotation blade 5-2 is connected to the connecting plate 11 through bolts. The bearing seat 10 is connected to the stirring shaft 4 through two sets of bearings 12. A spacer ring 13 is installed between the two sets of bearings 12. The bearing 12 is positioned on the stirring shaft 4 through a shaft retaining ring 16. The bearing seat 10 is positioned with the bearing 12 through a hole retaining ring 17. Pressure covers 14 are installed at the upper and lower ends of the bearing seat 10 respectively. Sealing rings 15 are provided between the pressure cover 14 and the bearing seat 10, and between the pressure cover 14 and the stirring shaft 4 respectively. For the convenience of disassembly and assembly, the diameter of the bearing position of the bearing 12 increases successively from bottom to top.

[0033] A rotating sleeve 21 is sleeved on the upper part of the stirring shaft 4. The upper and lower parts of the rotating sleeve 21 are connected to the stirring shaft 4 through two sets of bearings 12. The bearing 12 is positioned on the stirring shaft 4 through a shaft retaining ring. A rotary seal 3-2 that cooperates with the rotating sleeve 21 is installed on the inner peripheral surface of the fixed ring 3-1. Sealing covers 21-1 for sealing the bearings 12 are installed at the upper and lower ends of the rotating sleeve 21 respectively. Sealing rings that are sealed with the stirring shaft 4 are installed on the inner peripheral surface of the sealing cover 21-1. The lower end of the rotating sleeve 21 extends into the cylinder body 2. The outer circumferential surface of the lower end of the rotating sleeve 21 is connected to the upper end of a vertical connecting rod 24-1 through bolts. The lower end of the connecting rod 24-1 is connected to a vertical upper connecting plate 24-2 through bolts. The lower end of the upper connecting plate 24-2 is welded to the upper end surface of the bearing seat 10 of the reverse rotation blade 5-2 on the sixth layer.

[0034] A vertical lower connecting plate 24-3 is welded to the lower end surface of the bearing seat 10 of the reverse rotation blade 5-2 on the sixth layer. The upper connecting plate 24-2 and the lower connecting plate 24-3 are welded to the upper end surface and the lower end surface of the bearing seat 10 on the fourth layer respectively. The upper connecting plate 24-2 is welded to the upper end surface of the bearing seat 10 on the second layer. The bearing seats 10 between the sixth layer and the fourth layer are connected through a "U"-shaped transmission rod 24. The transmission rod 24 is horizontally arranged ( Figure 8 、 Figure 9As shown, the upper vertical part of the transmission rod 24 is connected to the lower connecting plate 24-3 of the bearing seat 10 on the sixth layer by bolts, and the lower vertical part of the transmission rod 24 is connected to the upper connecting plate 24-2 of the bearing seat on the fourth layer by bolts. The bearing seats 10 on the fourth layer and the second layer are connected by the transmission rod 24, and the upper connecting plate 24-2 is welded to the upper end face of the bearing seat 10 on the second layer. The horizontal frame part 24-4 of the transmission rod 24 encloses the positive rotation propeller blade 5-1. When the positive rotation propeller blade 5-1 rotates, it turns through the frame gap of the frame part 24-4 of the transmission rod 24. While the transmission rod 24 drives the bearing seat 10, it plays a role in stirring.

[0035] The upper end of the stirring shaft 4 is connected to the first output shaft 19-1 of the speed reducer 19 through a coupling 18 ( Figure 7 As shown). The speed reducer 19 is driven by a motor 20 and is installed on the upper cover 3 through a bracket 19-3. The collar 21-2 is sleeved on the upper part of the rotating sleeve 21 and welded to the rotating sleeve 21. The driven gear 22 is sleeved on the rotating sleeve 21 and connected to the collar 21-2 by bolts. The driven gear 22 meshes with the driving gear 23, and the driving gear 23 is installed on the second output shaft 19-2. The first output shaft 19-1 drives the stirring shaft 4 to rotate clockwise, and the second output shaft 19-2 drives the rotating sleeve 21 to rotate counterclockwise through the driving gear 23 and the driven gear 22. The stirring shaft 4 drives the positive rotation propeller blades 5-1 on three layers to rotate clockwise, and the rotating sleeve 21 drives the reverse rotation propeller blades 5-2 on three layers to rotate counterclockwise through the bearing seat 10 and the transmission rod 24, greatly improving the stirring effect. In order to achieve a better stirring effect, the driven gear 22 and the driving gear 23 respectively adopt triple gears (not shown in the figure), and a fork is installed on the driving gear 23, which is driven by an electric push rod. The reverse rotation propeller blade 5-2 realizes three different rotation speeds, so as to form different speed differences between the reverse rotation propeller blade 5-2 and the forward rotation propeller blade 5-1, and better improve the stirring effect.

[0036] Five layers of radial blockers 25 are arranged on the inner cylindrical wall of the cylinder body 2, with six blockers in each layer and evenly distributed on the inner cylindrical wall of the cylinder body 2. The number of blockers 25 in each layer is adjusted according to the diameter of the cylinder body 2. Each layer of blocker 25 is located between two adjacent positive rotation propeller blades 5-1 and reverse rotation propeller blades 5-2, and the blocker 25 corresponds to the space between the positive rotation propeller blade 5-1 and the reverse rotation propeller blade 5-2. The blocker 25 is a three-stage telescopic structure ( Figure 10 、 Figure 11 As shown), which is composed of a first-stage blocker 25-1, a second-stage blocker 25-2 and a third-stage blocker 25-3. Each stage of the blocker is rectangular and each stage of the blocker is a hollow chamber structure. The third-stage blocker 25-3 is sleeved with the second-stage blocker 25-2, the second-stage blocker 25-2 is sleeved with the first-stage blocker 25-1, and the outer end of the first-stage blocker 25-1 is welded to the cylindrical wall of the cylinder body 2.

[0037] The area of the port at the extended end of the first-stage stopper 25-1 and the second-stage stopper 25-2 is smaller than the area of the port at their outer open ends. Sealing rings 25-4 are installed on the wall surfaces of the ports at the extended ends of the first-stage stopper 25-1 and the second-stage stopper 25-2. The sealing rings 25-4 are respectively in sealing fit with the four outer wall surfaces of the second-stage stopper 25-2 and the third-stage stopper 25-3. Rectangular positioning frames 25-6 are welded to the outer peripheral surfaces of the outer open ends of the second-stage stopper 25-2 and the third-stage stopper 25-3. Grooves are provided on the outer peripheral surfaces of the positioning frames 25-6, and sealing rings 25-4 are installed in the grooves. The sealing rings 25-4 are respectively in sealing fit with the four inner wall surfaces of the first-stage stopper 25-1 and the second-stage stopper 25-2. An outer end plate 25-25 is installed at the outer open end of the first-stage stopper 25-1, and a gasket is installed between the outer end plate 25-25 and the first-stage stopper 25-1. Positioning bars 25-5 are welded to the inner peripheral surfaces of the outer open ends of the first-stage stopper 25-1 and the second-stage stopper 25-2. The outer end plate 25-25 is respectively welded with a water inlet pipe 30 and a water return pipe 31. The water inlet pipes 30 on the same layer are connected in parallel, and the water return pipes 31 on the same layer are connected in parallel. The water inlet pipe 30 is connected to a heat exchange water pump through a pipeline, and the water return pipe 31 is connected to a heat exchange pool through a pipeline.

[0038] The first-stage stopper 25-1 and the third-stage stopper 25-3 are driven by a driving member. The driving member adopts a cylinder 26. The cylinder 26 is horizontally placed outside the middle of the first-stage stopper 25-1. The cylinder body 26-1 of the cylinder 26 is connected to the outer end plate 25-7 through a bracket 27. The piston rod 26-2 of the cylinder 26 passes through the outer end plate 25-7 and enters the chamber of the third-stage stopper 25-3. The end of the piston rod 26-2 is connected to the inner end plate 25-8 of the third-stage stopper 25-3 through a connecting block 26-3. An O-shaped sealing ring 28 is installed between the through hole of the outer end plate 25-7 and the piston rod 26-2, and the O-shaped sealing ring 28 seals the piston rod 26-2. Horizontal fins 32 are respectively welded to the two side plates of the first-stage stopper 25-1 to enhance the heat exchange effect. Elastic scraping blades 33 are installed around the outer plate surfaces of the extended ports of the first-stage stopper 25-1 and the second-stage stopper 25-2. The elastic scraping blades 33 are used to clean the outer wall surfaces of the second-stage stopper 25-2 and the third-stage stopper 25-3.

[0039] When the stirring shaft 4 of the present invention stirs materials such as styrene, the stopper is in a retracted state ( Figure 12 as shown), the positive rotation paddle 5-1 and the reverse rotation paddle 5-2 rotate in opposite directions, so that the materials are stirred evenly, improving the stirring effect. During the reaction process, when rapid heating is required, the cylinder 26 drives the second-stage stopper 25-2 and the third-stage stopper 25-3 to extend ( Figure 13As shown, the third-level blocker 25-3 extends into the center of the cylinder body 2 and is close to the stirring shaft 4, increasing the heat dissipation area, enabling the liquid to quickly heat up, improving the reaction effect of styrene. While heating up, the positive rotation paddle 5-1 and the reverse rotation paddle 5-2 rotate, greatly improving the reaction efficiency of styrene and increasing the output. After the styrene reaction is completed, the third-level blocker 25-3 extends into the cylinder body 2 for rapid cooling. The present invention greatly improves the reaction effect of styrene, shortens the reaction time, and greatly improves the production efficiency.

[0040] The above are only the preferred and feasible embodiments of the present invention, and do not limit the scope of rights of the present invention accordingly. Any equivalent structural changes made by using the content of the specification and drawings of the present invention are included in the scope of rights of the present invention.

Claims

1. A styrene reactor, comprising a cylinder, a lower head, an upper cover, a stirring shaft, and a driving mechanism, wherein the stirring shaft is placed in the cylinder, and a radial blocker is provided on the inner wall of the cylinder, characterized in that: The stirring shaft is provided with multiple layers of forward-rotating blades and reverse-rotating blades with opposite rotation directions, the forward-rotating blades and reverse-rotating blades are respectively fixedly connected and rotationally connected to the stirring shaft in the circumferential direction, the forward-rotating blades and reverse-rotating blades are arranged in layers from bottom to top, the reverse-rotating blades on the top layer are driven by a rotating sleeve sleeved on the upper end of the stirring shaft, the rotating sleeve and the stirring shaft are driven by a driving mechanism and have opposite rotation directions; the reverse-rotating blades of two adjacent layers are driven by a horizontal "J"-shaped transmission rod, and the forward-rotating blades rotate through a horizontal frame gap of the transmission rod; The barrier is multi-layered, and each layer of barrier is located between adjacent forward-rotating blades and counter-rotating blades. The barrier is a three-stage telescopic structure, consisting of a primary barrier, a secondary barrier and a tertiary barrier. The primary barrier and the tertiary barrier are driven by a driving member, and each layer of the primary barrier is equipped with an inlet pipe and a return pipe. When rapid heating is required, the tertiary barrier is extended into the center of the cylinder and close to the stirring shaft to rapidly heat up the liquid. After the styrene reaction is completed, the tertiary barrier is extended into the cylinder to rapidly cool down.

2. The styrene reactor according to claim 1, wherein: The lower end of the rotating sleeve extends into the cylinder, the bearing seat is rotatably connected to the stirring shaft, the counter-rotating blades are radially installed on the bearing seat, the upper end of the connecting rod is fixedly connected to the lower end of the rotating sleeve, and the lower end of the connecting rod is connected to the bearing seat of the top layer through a connecting plate.

3. The styrene reactor according to claim 2, characterized in that: The upper vertical portion of the transmission rod is fixedly connected to the lower connecting plate, the lower connecting plate is axially fixedly connected to the lower end surface of the bearing seat of the upper layer of the transmission rod, the lower vertical portion of the transmission rod is fixedly connected to the upper connecting plate, and the upper connecting plate is axially fixedly connected to the upper end surface of the bearing seat of the lower layer of the transmission rod.

4. The styrene reactor according to claim 1, wherein: The water inlet pipes on the same floor are connected in parallel, and the water return pipes on the same floor are connected in parallel.

5. The styrene reactor according to claim 1, wherein: The transmission rod is a strip plate welding component.

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