External circulation cooling system for phosphorus oxychloride production

Abstract

The utility model discloses an external circulation cooling system for phosphorus oxychloride production, which comprises a reaction kettle, a first pipe body, a second pipe body and a cooling assembly, the first pipe body penetrates through the reaction kettle, and the first pipe body is positioned on a lower kettle body of the reaction kettle; the second pipe body is communicated with the first pipe body, and an infusion pump is fixedly mounted on the second pipe body; the cooling assembly is communicated with the second pipe body, the cooling assembly is communicated with a seventh pipe body, and the seventh pipe body penetrates through the upper kettle body of the reaction kettle. The cooling assembly comprises a third pipe body, a fourth pipe body is fixedly connected into the third pipe body, the second pipe body and the seventh pipe body are communicated through the fourth pipe body, and a cooling cavity is formed between the third pipe body and the fourth pipe body. According to the external circulation cooling system for phosphorus oxychloride production, the cooling efficiency can be effectively improved, and reaction liquid in the reaction kettle can be uniformly circulated, so that the problem that the temperature in the middle of the reaction kettle is too high is avoided, and the product quality is effectively guaranteed.

Description

Technical Field

[0001] This utility model belongs to the field of chemical equipment technology, specifically relating to an external circulation cooling system for the production of phosphorus oxychloride. Background Technology

[0002] With the development of technology, phosphorus oxychloride, as an important chemical raw material, is widely used in many fields such as medicine, pesticides, and electronics. Its production process releases a large amount of heat. When the temperature exceeds 80℃, liquid phosphorus trichloride gradually transforms into a gaseous state. As the temperature continues to rise, phosphorus trichloride further decomposes into elemental phosphorus and chlorine gas. This process not only causes corrosion inside the reaction vessel but also affects the quality of the final product.

[0003] To avoid this problem, existing technologies typically add cooling devices to the outer wall of the reactor, indirectly cooling the reaction liquid inside by lowering the temperature of the outer wall. However, this method has low cooling efficiency because the reaction liquid inside the reactor does not circulate. Furthermore, due to the lack of reaction liquid circulation, the temperature in the middle of the reactor often remains higher, affecting the final quality of the product.

[0004] Therefore, in order to address the aforementioned technical problems, it is necessary to provide an external circulation cooling system for the production of phosphorus oxychloride.

[0005] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0006] The purpose of this invention is to provide an external circulation cooling system for phosphorus oxychloride production, which can solve the above-mentioned problems.

[0007] To achieve the above objectives, a specific embodiment of this utility model provides an external circulation cooling system for the production of phosphorus oxychloride, including a reactor, a first tube, a second tube, and a cooling assembly. The first tube penetrates the reactor and is located on the lower body of the reactor. The second tube is connected to the first tube, and a liquid pump is fixedly installed on the second tube. The cooling assembly is connected to the second tube, and a seventh tube is connected to the cooling assembly, penetrating the upper body of the reactor.

[0008] In one or more embodiments of the present invention, the cooling assembly includes a third tube body, a fourth tube body is fixedly connected inside the third tube body, the second tube body and the seventh tube body are connected through the fourth tube body, the inner diameter of the third tube body is larger than the outer diameter of the fourth tube body, a cooling cavity is formed between the third tube body and the fourth tube body, and coolant flows in the cooling cavity.

[0009] In one or more embodiments of this utility model, a fifth pipe and a sixth pipe are fixedly connected to the third pipe, and the fifth pipe and the sixth pipe enable the flow of coolant in the cooling chamber.

[0010] In one or more embodiments of this utility model, the second tube and the seventh tube are detachably connected to the fourth tube.

[0011] In one or more embodiments of this utility model, a plurality of eighth tubes are fixedly connected to the seventh tube extending into the reactor, and a plurality of spray holes are opened on the eighth tubes.

[0012] In one or more embodiments of this utility model, a plurality of eighth tubes are circumferentially fixedly connected to the seventh tube.

[0013] In one or more embodiments of this utility model, the first tube located inside the reactor has multiple rows of liquid inlets.

[0014] In one or more embodiments of this utility model, the external circulation cooling system for phosphorus oxychloride production further includes a valve body, a first pipe body and a second pipe body fixedly connected to the valve body at 90°, a rotating groove is provided on the valve body, a ball is rotatably connected in the rotating groove, a first liquid inlet groove and a second liquid inlet groove are provided on the ball, a rotating rod is integrally formed on the ball, the rotating rod passes through the valve body, the rotating rod is rotatably connected to the valve body, and a damping sleeve matching the rotating rod is installed on the valve body.

[0015] In one or more embodiments of this utility model, a first guide rod and a second guide rod are fixedly connected to the rotating rod, the first liquid inlet groove and the first tube body are matched, and the second liquid inlet groove and the second tube body are matched.

[0016] In one or more embodiments of this utility model, a ninth pipe body, symmetrical to the second pipe body, is fixedly connected to the valve body.

[0017] Compared with the prior art, the external circulation cooling system for phosphorus oxychloride production of this utility model can effectively improve the cooling efficiency, so that the reaction liquid in the reactor can be circulated evenly, thereby avoiding the problem of excessive temperature in the middle of the reactor and effectively ensuring product quality. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the external circulation cooling system for phosphorus oxychloride production in one embodiment of the present invention;

[0020] Figure 2 This is a cross-sectional view of a reactor in an external circulation cooling system for the production of phosphorus oxychloride according to one embodiment of the present invention;

[0021] Figure 3 This is a cross-sectional view of the cooling components of an external circulation cooling system for phosphorus oxychloride production according to one embodiment of the present invention.

[0022] Figure 4 This is a schematic diagram of the structure of the seventh pipe of an external circulation cooling system for phosphorus oxychloride production in one embodiment of the present invention;

[0023] Figure 5 This is a schematic diagram of the structure of the first pipe body of an external circulation cooling system for phosphorus oxychloride production in one embodiment of the present invention;

[0024] Figure 6 This is a schematic diagram of the valve body of an external circulation cooling system for phosphorus oxychloride production according to one embodiment of the present invention;

[0025] Figure 7 This is a cross-sectional view of the valve body of an external circulation cooling system for phosphorus oxychloride production according to one embodiment of the present invention;

[0026] Figure 8 This is a schematic diagram of the structure of a sphere in an external circulation cooling system for phosphorus oxychloride production according to one embodiment of the present invention.

[0027] Explanation of key figure labels:

[0028] 1. Reactor; 11. First tube; 111. Liquid inlet; 2. Second tube; 21. Infusion pump; 3. Valve body; 301. Rotating groove; 31. Ball; 311. First inlet groove; 312. Second inlet groove; 32. Rotating rod; 33. First guide rod; 34. Second guide rod; 35. Damping sleeve; 4. Third tube; 41. Fourth tube; 42. Fifth tube; 43. Sixth tube; 5. Seventh tube; 51. Eighth tube; 511. Spray hole; 6. Cooling chamber; 7. Ninth tube. Detailed Implementation

[0029] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0030] like Figures 1 to 4 As shown, an external circulation cooling system for phosphorus oxychloride production according to one embodiment of this utility model includes a reactor 1, a first tube 11, a second tube 2, and a cooling assembly. The first tube 11 penetrates the reactor 1 and is located on the lower body of the reactor 1; the second tube 2 is connected to the first tube 11, and a liquid pump 21 is fixedly installed on the second tube 2; the cooling assembly is connected to the second tube 2, and a seventh tube 5 is connected to the cooling assembly, penetrating the upper body of the reactor 1.

[0031] Specifically, the cooling assembly includes a third tube 4, inside which a fourth tube 41 is welded. The second tube 2 and the seventh tube 5 are connected through the fourth tube 41. The inner diameter of the third tube 4 is larger than the outer diameter of the fourth tube 41. A cooling chamber 6 is formed between the third tube 4 and the fourth tube 41, and coolant flows through the cooling chamber 6.

[0032] During the production of phosphorus oxychloride, the infusion pump 21 is started. The infusion pump 21 draws the reaction liquid from the reactor 1 and introduces it into the fourth tube 41. The reaction liquid in the fourth tube 41 exchanges heat with the cooling chamber 6, and then enters the reactor 1 again through the seventh tube 5. In this process, the reaction liquid is cooled while the reaction liquid in the reactor 1 flows, which improves the cooling efficiency, prevents the temperature of the reaction liquid in the middle of the reactor 1 from getting too high, and ensures the quality of the product.

[0033] Furthermore, a fifth pipe body 42 and a sixth pipe body 43 are welded to the third pipe body 4, and the fifth pipe body 42 and the sixth pipe body 43 enable the flow of coolant in the cooling chamber 6.

[0034] Specifically, a coolant at a lower temperature is continuously introduced into the cooling chamber 6 from the fifth tube 42 and then discharged from the sixth tube 43, ensuring effective heat exchange with the reaction liquid in the fourth tube 41. Furthermore, the flow direction of the coolant in the cooling chamber 6 is opposite to that in the fourth tube 41; that is, the fifth tube 42 is located closer to the seventh tube 5, and the sixth tube 43 is located closer to the second tube 2. As the reaction liquid flows within the fourth tube 41, its temperature gradually decreases, ensuring efficient heat exchange.

[0035] Preferably, the coolant is water, which is readily available and inexpensive, and has high thermal conductivity. As a coolant, it can be discharged without special treatment and will not have a lasting impact on the ecological environment, meeting the requirements of modern industrial green production.

[0036] Furthermore, the second pipe body 2 and the seventh pipe body 5 are detachably connected to the fourth pipe body 41 via flanges. Scale will form on the outer wall of the fourth pipe body 41 and the inner wall of the third pipe body 4 after long-term use. The cooling components can be removed from the second pipe body 2 and the seventh pipe body 5 via the flanges to replace the cooling components.

[0037] Furthermore, multiple eighth tubes 51 are fixedly connected to the seventh tube 5 extending into the reactor 1, and multiple spray holes 511 are opened on the eighth tubes 51. Specifically, the multiple eighth tubes 51 are circumferentially welded to the seventh tube 5 and are distributed in multiple rows. The reaction liquid cooled in the seventh tube 5 is evenly sprayed into the reactor 1 from the spray holes 511 and mixed with the reaction liquid in the reactor 1, further agitating the reaction liquid in the reactor 1 and greatly improving the cooling efficiency.

[0038] Furthermore, the first tube 11 located inside the reactor 1 has multiple rows of liquid inlets 111. Specifically, a portion of the first tube 11 extends into the reactor 1. After the liquid pump 21 is started, the reaction liquid in the reactor 1 is drawn into the first tube 11 from the liquid inlets 111 at different heights, thereby enhancing the flow of the reaction liquid in the reactor 1 and preventing the temperature of the reaction liquid in the middle of the reactor 1 from becoming too high.

[0039] like Figures 1 to 8 As shown, the external circulation cooling system for phosphorus oxychloride production also includes a valve body 3. A first pipe body 11 and a second pipe body 2 are connected through the valve body 3, and the first pipe body 11 and the second pipe body 2 are welded to the valve body 3 at a 90° angle. A rotating groove 301 is provided on the valve body 3, and a ball 31 is rotatably connected in the rotating groove 301. A first liquid inlet groove 311 and a second liquid inlet groove 312 are provided on the ball 31, and a rotating rod 32 is integrally formed on the ball 31. The rotating rod 32 passes through the valve body 3 and is rotatably connected to the valve body 3.

[0040] Specifically, before turning on the infusion pump 21, rotate the rotating rod 32 so that when the first inlet groove 311 is aligned with the first tube 11, the second inlet groove 312 is also aligned with the second tube 2, thus achieving the connection between the first tube 11 and the second tube 2.

[0041] Furthermore, a first guide rod 33 and a second guide rod 34 are welded onto the rotating rod 32. The first liquid inlet groove 311 matches the first tube 11, and the second liquid inlet groove 312 matches the second tube 2. The orientation of the second liquid inlet groove 312 and the first liquid inlet groove 311 can be determined by the positions of the first guide rod 33 and the second guide rod 34, which facilitates the connection between the first tube 11 and the second tube 2.

[0042] Furthermore, a ninth tube 7, symmetrical to the second tube 2, is welded onto the valve body 3. Specifically, after the phosphorus oxychloride production in the reactor 1 is completed, rotating the rotating rod 32 will connect the first tube 11 and the ninth tube 7 when the first pointing rod 33 is aligned with the first tube 11 and the second pointing rod 34 is aligned with the ninth tube 7, allowing the phosphorus oxychloride to be discharged. In addition to their directional function, the first pointing rod 33 and the second pointing rod 34 can also be used as handles, making it easier for operators to rotate the rotating rod 32.

[0043] It is worth noting that a damping sleeve 35 matching the rotating rod 32 is installed on the valve body 3. The damping sleeve 35 can generate a certain resistance to the rotating rod 32, so that the rotating rod 32 will not rotate due to the pressure inside the first tube 11. Only by applying a certain external force to the rotating rod 32 can the rotating rod 32 rotate.

[0044] In use, rotate the rotating rod 32 to align the first pointing rod 33 with the second tube 2. At this time, the first tube 11 and the second tube 2 are connected. Start the infusion pump 21, and the reaction liquid in the reactor 1 is transported to the cooling component. After being cooled by the cooling component, the coolant is sprayed out through the spray hole 511 and mixed with the reaction liquid in the reactor 1, which greatly improves the cooling efficiency of the reaction liquid in the reactor 1.

[0045] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0046] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An external circulation cooling system for the production of phosphorus oxychloride, comprising a reaction vessel, characterized in that, Also includes: The first tube penetrates the reactor and is located on the lower body of the reactor. The second tube is connected to the first tube, and an infusion pump is fixedly installed on the second tube. The cooling assembly is connected to the second tube, and a seventh tube is connected to the cooling assembly, which penetrates the upper body of the reactor.

2. The external circulation cooling system for phosphorus oxychloride production according to claim 1, characterized in that, The cooling assembly includes a third tube body, a fourth tube body fixedly connected inside the third tube body, a second tube body and a seventh tube body connected through the fourth tube body, the inner diameter of the third tube body is larger than the outer diameter of the fourth tube body, a cooling chamber is formed between the third tube body and the fourth tube body, and coolant flows in the cooling chamber.

3. The external circulation cooling system for phosphorus oxychloride production according to claim 2, characterized in that, The fifth and sixth pipes are fixedly connected to the third pipe, and the fifth and sixth pipes enable the flow of coolant in the cooling chamber.

4. The external circulation cooling system for phosphorus oxychloride production according to claim 2, characterized in that, The second and seventh tubes are detachably connected to the fourth tube.

5. The external circulation cooling system for phosphorus oxychloride production according to claim 2, characterized in that, The seventh tube extends into the reactor and is fixedly connected to multiple eighth tubes, each with multiple spray holes.

6. The external circulation cooling system for phosphorus oxychloride production according to claim 5, characterized in that, Multiple eighth tubes are fixedly connected to the seventh tube in a circular pattern.

7. The external circulation cooling system for phosphorus oxychloride production according to claim 2, characterized in that, The first tube, located inside the reactor, has multiple liquid inlets.

8. The external circulation cooling system for phosphorus oxychloride production according to claim 2, characterized in that, The external circulation cooling system for phosphorus oxychloride production also includes a valve body. A first pipe and a second pipe are fixedly connected to the valve body at a 90° angle. A rotating groove is provided on the valve body, and a ball is rotatably connected in the rotating groove. A first liquid inlet groove and a second liquid inlet groove are connected in the ball. A rotating rod is integrally formed on the ball, and the rotating rod passes through the valve body and is rotatably connected to the valve body. A damping sleeve that matches the rotating rod is installed on the valve body.

9. The external circulation cooling system for phosphorus oxychloride production according to claim 8, characterized in that, A first guide rod and a second guide rod are fixedly connected to the rotating rod. The first liquid inlet groove and the first tube body are matched, and the second liquid inlet groove and the second tube body are matched.

10. The external circulation cooling system for phosphorus oxychloride production according to claim 9, characterized in that, A ninth pipe body, symmetrical to the second pipe body, is fixedly connected to the valve body.

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