Disproportionation reactor
By employing a segmented heating design and a stirrer combined with a reflux pipe in the disproportionation reactor, the problem of uneven heating was solved, achieving uniform heating and complete reaction of the reactants, thereby improving reaction efficiency and equipment lifespan.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG YOURUIXIN CHEM CO LTD
- Filing Date
- 2025-05-22
- Publication Date
- 2026-04-28
AI Technical Summary
Existing disproportionation reactors suffer from uneven heating during heat exchange, resulting in low reaction efficiency.
The design employs segmented heating, using top and bottom heating pipes combined with end cap coils, along with a stirrer and reflux pipe, to ensure uniform heating of the reactants. A magnetic stirrer is also used to prevent mechanical seal leakage, thus extending the equipment's lifespan.
This method achieves uniform heating of the reactants, improves reaction efficiency and the degree of complete reaction of the products, and enhances product quality and equipment lifespan.
Smart Images
Figure CN224167522U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of chemical equipment, and in particular to a disproportionation reactor. Background Technology
[0002] Dichlorodimethylsilane is an important organosilicon compound widely used in the production of organosilicon products such as silicone oil, silicone rubber, and silicone resin. In industrial production, the disproportionation method is generally used to generate dichlorodimethylsilane. The reaction equation is as follows:
[0003] (CH3)4Si +CH3SiCl3→(CH3)2SiCl2+(CH3)3SiCl
[0004] Since disproportionation reactions require heating to control their reaction progress, existing disproportionation reactors are equipped with jackets or heat pipes on their outer walls for temperature control. However, during the heat exchange process, as the hot steam moves, the heat at the end furthest from the steam inlet gradually decreases, resulting in uneven heating and uneven material reaction, which affects reaction efficiency. Utility Model Content
[0005] In order to achieve uniform heating and improve reaction efficiency, this application provides a disproportionation reactor.
[0006] The disproportionation reactor provided in this application adopts the following technical solution:
[0007] A disproportionation reactor includes a cylindrical body, a top end cap fixedly connected to the top of the cylindrical body, and a bottom end cap fixedly connected to the bottom of the cylindrical body. A plurality of lugs are connected to the outer wall of the cylindrical body. The top end cap has a feed inlet, and the bottom end cap has a discharge outlet. A stirrer is installed on the top end cap, and a stirring shaft extending into the cylindrical body is connected to the bottom of the stirrer. Insulated heat pipes are connected to the outer wall of the cylindrical body. The insulated heat pipes include a top heat pipe and a bottom heat pipe. Both the top and bottom heat pipes have steam ports at their top ends and condensate ports at their other ends. The top heat pipe includes a homogenizing section and a spiraling section. The homogenizing section is arranged longitudinally and distributed around the lugs, while the spiraling section is spirally distributed downwards around the outer wall of the cylindrical body.
[0008] By adopting the above technical solution, the stirrer drives the stirring shaft to rotate, promoting uniform mixing of reactants and improving reaction efficiency; the heat pipes on the outer wall of the cylinder are divided into top heat pipes and bottom heat pipes, realizing segmented heating of the heat pipes, which can effectively avoid the problems of local overheating or uneven cooling, and can distribute heat differently according to different positions, thereby effectively ensuring that the reactants inside the cylinder are heated evenly, ensuring that the reaction proceeds evenly, and thus effectively improving reaction efficiency.
[0009] Optionally, the bottom heating pipe is spirally arranged downward around the outer wall of the cylinder, with one end of the bottom heating pipe attached to the top heating pipe and the other end extending downward to the bottom of the cylinder.
[0010] By adopting the above technical solution, the outer wall of the cylinder can be completely covered by the heat pipe, and the spiral downward setting allows the condensate formed after the steam inside the heat pipe undergoes heat exchange to be directly discharged along the heat pipe. The condensate is less likely to accumulate inside the heat pipe and affect the heating effect of the heat pipe, thus effectively ensuring the heating capacity of the heat pipe.
[0011] Optionally, the bottom end cap is provided with an end cap coil, which is spirally arranged outward from the center of the bottom end cap.
[0012] By adopting the above technical solution, the bottom of the reactor can also be effectively heated, thereby achieving uniform heating of the entire reactor. Furthermore, the spiral coils of the end caps are evenly distributed on the bottom end caps, effectively increasing the contact area and improving the heat exchange efficiency, thereby improving the heating efficiency.
[0013] Optionally, the end cap coil is provided with a condensate outlet pipe at one end near the center of the bottom end cap and a steam inlet pipe at the other end.
[0014] By adopting the above technical solution, since the center height of the bottom end cap is relatively low, the condensate outlet pipe is set in the center of the bottom end cap, which allows the condensate to flow out naturally from the end cap coil under the influence of gravity, making it less likely to accumulate and reduce the heat exchange capacity of the end cap coil, thus effectively ensuring the heating capacity of the end cap coil.
[0015] Optionally, a return pipe is provided inside the cylinder, and the return pipe passes through the top end cap.
[0016] By adopting the above technical solution, during the heating process of the reactor, some reactants evaporate to form gas. The reflux pipe can effectively condense the gas, allowing these reactants to flow back to the bottom of the reactor for further reaction, effectively improving reaction efficiency and ensuring that the reactants in the reactor react completely.
[0017] Optionally, a fixing bracket for fixing the return pipe is fixedly connected to the inner side wall of the cylinder. The fixing bracket has a guide hole for the return pipe to pass through, and the radial direction of the guide hole gradually decreases towards the bottom end cap.
[0018] By adopting the above technical solution, the return pipe is effectively fixed, preventing it from shaking and rubbing against other components inside the cylinder, thus ensuring the strength and service life of the return pipe; the guide hole can help install the return pipe, thereby effectively improving the installation efficiency.
[0019] Optionally, a baffle is fixedly connected to the inner side wall of the cylinder.
[0020] By adopting the above technical solution, the baffle can disrupt the laminar flow state of the fluid during the stirring process, causing the fluid to enter a turbulent state. When the fluid flows past the baffle, eddies and vortices are formed behind the baffle. These eddies make the fluid's trajectory more complex and irregular, increasing the degree of turbulence, making the fluid mixing more thorough and rapid, accelerating the contact and reaction between reactants, and improving reaction efficiency.
[0021] Optionally, the bottom wall of the inner cylinder is provided with a support seat for supporting the stirring shaft.
[0022] By adopting the above technical solution, the stirring shaft will not shake when rotating, avoiding uneven stirring caused by shaking, ensuring uniform material distribution in the reactor, improving product quality and reaction conversion rate; and effectively reducing mechanical wear caused by shaking.
[0023] Optionally, the stirrer is a magnetic stirrer.
[0024] By adopting the above technical solution, the magnetic stirrer transmits the rotational motion of the motor to the stirring shaft through magnetic transmission, avoiding the leakage problems that may occur with traditional mechanical seals, reducing friction and wear between the stirring shaft and the sealing device, lowering the incidence of mechanical failures, and thus extending the service life of the equipment.
[0025] In summary, this application has the following beneficial effects:
[0026] 1. By setting up top heating pipes, bottom heating pipes, and end cap coils, the reactor can be heated in sections. Different heat distribution can be carried out according to different locations, thereby effectively ensuring that the reactants inside the cylinder are heated evenly, ensuring that the disproportionation reaction proceeds normally, and effectively improving the reaction efficiency.
[0027] 2. By setting up a reflux pipe, some of the gas during the reaction can be condensed and returned to the bottom of the reactor for re-reaction, ensuring that the reactants can react completely and effectively improving the degree and efficiency of the reaction. Attached Figure Description
[0028] Figure 1 This is a schematic diagram of the disproportionation reactor according to an embodiment of this application;
[0029] Figure 2 This is a schematic diagram of the top end cap structure according to an embodiment of this application;
[0030] Figure 3 This is a schematic diagram of the structure of the heat-insulating heat pipe according to an embodiment of this application;
[0031] Figure 4 This is a schematic diagram of the bottom end cap structure according to an embodiment of this application.
[0032] Explanation of reference numerals in the attached drawings: 1. Cylinder body; 11. Ear seat; 12. Return pipe; 13. Fixed bracket; 131. Guide hole; 14. Baffle; 15. Support seat; 2. Top head; 21. Feed inlet; 22. Agitator; 23. Agitator shaft; 3. Bottom head; 31. Discharge outlet; 32. Head coil; 321. Condensate outlet; 322. Steam inlet; 4. Insulated heat pipe; 41. Top heat pipe; 411. Soaking section; 412. Swirling section; 42. Bottom heat pipe; 43. Steam port; 44. Condensate port. Detailed Implementation
[0033] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.
[0034] This application discloses a disproportionation reactor. (Refer to...) Figure 1 , Figure 2 The disproportionation reactor includes a cylindrical body 1, a top end cap 2 fixedly connected to the top of the cylindrical body 1, and a bottom end cap 3 fixedly connected to the bottom of the cylindrical body 1. The top end cap 2 is provided with a feed inlet 21, and the bottom end cap 3 is provided with a discharge outlet 31. A stirrer 22 is installed on the top end cap 2, and a stirring shaft 23 extending into the interior of the cylindrical body 1 is connected to the bottom of the stirrer 22. Insulated heat pipes 4 and several lugs 11 are connected to the outer wall of the cylindrical body 1. During the disproportionation reaction, the material enters the interior of the cylindrical body 1 through the feed inlet 21 at the top. The stirrer 22 is activated, driving the stirring shaft 23 to rotate, so that the material is mixed evenly. The insulated heat pipes 4 raise the temperature inside the cylindrical body 1, and the material inside reaches the reaction temperature, thus undergoing disproportionation. Finally, the product is produced from the discharge outlet 31 of the bottom end cap 3.
[0035] Reference Figure 1 , Figure 2 and Figure 3 The heat pipe 4 includes a top heat pipe 41 distributed in the upper half of the cylinder 1 and a bottom heat pipe 42 distributed in the lower half of the cylinder 1. Both the top heat pipe 41 and the bottom heat pipe 42 have a steam port 43 at their top ends and a condensate port 44 at their other ends. The top heat pipe 41 includes a heat-spreading section 411 and a spiral section 412. The heat-spreading section 411 is arranged longitudinally and distributed around the lug 11, while the spiral section 412 spirals downwards around the outer wall of the cylinder 1. The top heat pipe 41 and the bottom heat pipe 42 provide segmented heating to the cylinder 1, allowing for different heat distribution at different locations. This effectively ensures uniform heating of the reactants within the cylinder 1 and guarantees complete reaction.
[0036] Reference Figure 1 , Figure 2 and Figure 3The bottom heat pipe 42 is spirally arranged downwards around the outer wall of the cylinder 1. One end of the bottom heat pipe 42 is attached to the top heat pipe 41, and the other end extends downwards to the bottom of the cylinder 1. The bottom heat pipe 42, together with the top heat pipe 41, ensures that the outer wall of the cylinder 1 is completely covered by the heat pipe, thereby ensuring the heating effect. Furthermore, after the steam undergoes heat exchange, condensate will form. The spirally arranged bottom heat pipe 42 allows the condensate to be discharged directly along the heat pipe under the action of gravity. Condensate is less likely to remain in the heat pipe and affect the heating effect of the heat pipe, thus effectively ensuring the heating capacity.
[0037] Reference Figure 4 The bottom end cap 3 is fixedly connected to an end cap coil 32, which is spirally arranged from the center of the bottom end cap 3 outwards. A condensate outlet pipe 321 is located at one end of the end cap coil 3 near the center of the bottom end cap 3, and a steam inlet pipe 322 is located at the other end. The spiral arrangement allows the end cap coil 32 to completely cover the bottom end cap 3, effectively increasing the thermal contact area and improving heat exchange efficiency, thus ensuring effective heating. Because the center of the bottom end cap 3 is lower, the condensate formed by the steam in the bottom heat pipe 42 will accumulate towards the center of the bottom heat pipe 42. Therefore, the condensate outlet pipe 321 is located at the end of the bottom heat pipe 42 near the center of the bottom end cap 3 to ensure that the condensate in the bottom heat pipe 42 can be effectively discharged.
[0038] Reference Figure 1 The cylinder 1 contains a reflux pipe 12, and a fixing bracket 13 is fixedly connected to the inner wall of the cylinder 1 for fixing the reflux pipe 12. The fixing bracket 13 has a guide hole 131 for the reflux pipe 12 to pass through, and the inner radial direction of the guide hole 131 gradually decreases near the bottom head 3. When the material is heated in the reactor, some reactants are heated to form steam. At this time, the reflux pipe 12 can condense these gases and return them to the bottom of the reactor, thereby ensuring that the material can be completely reacted and improving the yield. The fixing bracket 13 can ensure that the reflux pipe 12 does not shake inside the cylinder 1, preventing the reflux pipe 12 from shaking and rubbing against other parts, thereby ensuring the strength and service life of the reflux pipe 12. The guide surface can effectively guide the reflux pipe 12 into the fixing bracket, improving the installation efficiency.
[0039] Reference Figure 1 A baffle 14 is fixedly connected to the inner wall of the cylinder 1, and the baffle 14 is located on the side of the stirring shaft 23 away from the return pipe 12. When the stirring shaft 23 rotates and drives the material to mix, the baffle 14 can effectively disrupt the laminar flow state of the material during the stirring process, promote the material to enter the turbulent flow state, effectively increase the degree of turbulence of the material, make the material mix more thoroughly, accelerate the contact and reaction between reactants, and effectively improve the reaction efficiency.
[0040] Reference Figure 1The stirrer 22 is a magnetic stirrer 22, and a support base 15 for supporting the stirring shaft 23 is fixedly connected to the bottom wall of the inner body 1. The magnetic stirrer 22 transmits the rotational motion of the motor to the stirring shaft 23 through magnetic rotation, thereby avoiding the leakage problems that may occur with traditional mechanical seals, and effectively reducing the friction and wear between the stirring shaft 23 and the sealing device, reducing the incidence of mechanical failure, and effectively extending the service life of the equipment; the support base 15 can effectively prevent the stirring shaft 23 from shaking when rotating, thereby ensuring that the stirring shaft 23 in the reactor can effectively disperse materials, ensuring product quality and reaction conversion rate.
[0041] The implementation principle of a disproportionation reactor according to an embodiment of this application is as follows: the material is conveyed into the cylinder 1 from the feed port 21, the stirrer 22 is started, and the stirring shaft 23 rotates to make the material uniformly mixed. Then, hot steam is introduced into the top heat pipe 41, the bottom heat pipe 42 and the end coil 32 respectively, so that the material in the cylinder 1 is uniformly heated, improving the reaction efficiency. At this time, the disproportionation reaction can proceed smoothly. The return pipe 12 in the cylinder 1 can effectively condense the steam generated in the reaction and return it to ensure the complete reaction. Finally, the product is discharged from the discharge port 31 to complete the reaction.
[0042] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A disproportionation reactor, comprising a cylindrical body (1), a top end cap (2) fixedly connected to the top of the cylindrical body (1), and a bottom end cap (3) fixedly connected to the bottom of the cylindrical body (1), characterized in that: The outer wall of the cylinder (1) is connected to several lugs (11). The top end cap (2) is provided with a feed inlet (21). The bottom end cap (3) is provided with a discharge outlet (31). The top end cap (2) is equipped with a stirrer (22). The bottom of the stirrer (22) is connected to a stirring shaft (23) that extends into the cylinder (1). The outer wall of the cylinder (1) is connected to a heat-insulating pipe (4). The heat-insulating pipe (4) includes a top heat pipe (41) and a bottom heat pipe (42). The top end of the top heat pipe (41) and the bottom heat pipe (42) are both provided with a steam port (43) and the other end is provided with a condensate port (44). The top heat pipe (41) includes a heat-spreading section (411) and a spiral section (412). The heat-spreading section (411) is arranged longitudinally and distributed around the lugs (11). The spiral section (412) is spirally distributed downward around the outer wall of the cylinder (1).
2. The disproportionation reactor according to claim 1, characterized in that: The bottom heating pipe (42) is spirally arranged downward around the outer wall of the cylinder (1). One end of the bottom heating pipe (42) is attached to the top heating pipe (41), and the other end extends downward to the bottom of the cylinder (1).
3. The disproportionation reactor according to claim 1, characterized in that: The bottom end cap (3) is provided with an end cap coil (32), which is spirally arranged outward from the center of the bottom end cap (3).
4. The disproportionation reactor according to claim 3, characterized in that: The end cap coil (32) has a condensate outlet pipe (321) at one end near the center of the bottom end cap (3) and a steam inlet pipe (322) at the other end.
5. The disproportionation reactor according to claim 1, characterized in that: The cylinder (1) is provided with a return pipe (12) inside, and the return pipe (12) passes through the top end cap (2).
6. The disproportionation reactor according to claim 5, characterized in that: The inner wall of the cylinder (1) is fixedly connected to a fixing bracket (13) for fixing the return pipe (12). The fixing bracket (13) has a guide hole (131) for the return pipe (12) to pass through. The inner radial direction of the guide hole (131) gradually decreases towards the bottom end cap (3).
7. The disproportionation reactor according to claim 1, characterized in that: A baffle (14) is fixedly connected to the inner wall of the cylinder (1).
8. The disproportionation reactor according to claim 1, characterized in that: The inner bottom wall of the cylinder (1) is provided with a support seat (15) for supporting the stirring shaft (23).
9. The disproportionation reactor according to claim 1, characterized in that: The stirrer (22) is a magnetic stirrer (22).