Water sealing device for reaction kettle and reaction kettle

Abstract

The utility model relates to the technical field of reaction kettles, in particular to a water sealing device for a reaction kettle and the reaction kettle. The water sealing device comprises a bottom plate, an annular groove, a cover plate and a baffle, and the bottom plate is used for being fixedly connected to the top of the reaction kettle; the annular groove is formed in the bottom plate and provided with a liquid inlet and a liquid outlet. The cover plate is arranged above the annular groove, the cover plate is used for being in sealed connection with a stirring shaft of the reaction kettle, an annular insertion plate is fixedly arranged on the surface, facing the annular groove, of the cover plate, and the annular insertion plate is used for stretching into the sealing liquid in the annular groove; the baffle is arranged on the inner wall of the outer side plate of the annular groove, and a gap is formed between the baffle and the annular inserting plate in the radial direction of the annular groove. And the baffle can weaken the circular motion of the sealing liquid, so that the liquid level in the annular groove is kept stable, and the sealing liquid is prevented from splashing out of the annular groove or being sucked into the reaction kettle.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of reaction kettles, in particular to a water sealing device for a reaction kettle and a reaction kettle. BACKGROUND

[0002] A reaction kettle is a container or device used for carrying out chemical reactions. During the reaction process, the reaction solution in the reaction kettle needs to be stirred by a stirring shaft. In chemical reactions, toxic, harmful or corrosive substances may be involved. In order to prevent the leakage of the above-mentioned substances into the environment or to maintain a certain reaction pressure, the connection between the reaction kettle and the stirring shaft needs to be sealed.

[0003] Among them, the commonly used sealing methods include water sealing, packing sealing, mechanical sealing, dry gas sealing, etc. Among the above-mentioned sealing methods, water sealing is one of the lowest cost sealing methods, and water has good absorption effect on some toxic substances, such as ammonia. Regularly replacing the water in the water sealing device or using flowing water can ensure good sealing effect. However, the existing water sealing device includes a rotating ring fixedly connected with the stirring shaft, and the rapid rotation of the rotating ring may cause the splashing of water in the water sealing device. In addition, rapid pressure abnormalities may occur in the reaction kettle, causing the water in the water sealing device to be squeezed out or even sucked into the reaction kettle, thereby affecting the production environment. CONTENT OF THE INVENTION

[0004] The present application discloses a water sealing device for a reaction kettle and a reaction kettle to solve the problem that water in the existing water sealing device is easy to splash or be sucked into the reaction kettle.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0006] In a first aspect, the present application provides a water sealing device for a reaction kettle, which comprises a bottom plate, an annular groove, a cover plate and a baffle, wherein the bottom plate is used for being fixedly connected to the top of the reaction kettle; the annular groove is arranged on the bottom plate and is provided with a liquid inlet and a liquid outlet; the cover plate is arranged on the side of the annular groove away from the bottom plate, and is used for being sealingly connected with the stirring shaft of the reaction kettle; the surface of the cover plate facing the annular groove is fixedly provided with an annular insert plate, which is used for extending into the sealing liquid in the annular groove; the baffle is arranged on the inner wall of the outer plate of the annular groove, and has a gap between the baffle and the annular insert plate along the radial direction of the annular groove.

[0007] In use, the sealing liquid enters the annular groove through the liquid inlet, and when the sealing liquid in the annular groove reaches a preset liquid level, the liquid inlet and the liquid outlet can be closed to store a certain amount of sealing liquid in the annular groove; or the liquid inlet and the liquid outlet can be kept open to make the water in the annular groove circulate. When the stirring shaft of the reaction kettle starts to rotate, the cover plate rotates synchronously with the stirring shaft, and the annular insert plate extends into the sealing liquid in the annular groove, which divides the sealing liquid into two parts. Under the action of the positive pressure in the reaction kettle, the liquid level of the sealing liquid at the inner periphery of the annular insert plate drops, and the liquid level of the sealing liquid at the outer periphery of the annular insert plate rises, forming a pressure difference of the sealing liquid to resist the positive pressure in the reaction kettle and play a sealing role. At the same time, the baffle on the inner wall of the outer side plate can weaken the circumferential motion of the sealing liquid, which helps to keep the liquid level of the sealing liquid in the annular groove stable, reduces or avoids the splashing of the sealing liquid from the annular groove or being sucked into the reaction kettle.

[0008] Further, the number of baffles is multiple, and the multiple baffles are arranged at intervals along the circumference of the outer side plate.

[0009] Further, from the direction of the top end of the outer side plate to the bottom end of the outer side plate, the radial dimension of the baffle along the annular groove gradually decreases.

[0010] Further, the spacing between the baffle and the annular insert plate along the radial direction of the annular groove is greater than or equal to 1 mm.

[0011] Further, the height of the annular groove is greater than or equal to 150 mm; and / or, the liquid outlet is higher than the liquid inlet.

[0012] Further, the water sealing device further comprises a liquid receiving groove, and the liquid receiving groove is arranged around the outer periphery of the annular groove.

[0013] Further, the liquid receiving groove is provided with a liquid discharge port; and / or, the liquid receiving groove is higher than the liquid outlet.

[0014] Further, the annular groove and the cover plate are coaxially arranged; the water sealing device further comprises an annular plate, and the annular plate is fixedly arranged on the surface of the cover plate facing the annular groove, and the radial distance between the annular plate and the central axis of the annular groove is greater than the radial distance between the outer side plate and the central axis of the annular groove.

[0015] Further, along the axial direction of the annular groove, the height of the annular plate is greater than or equal to the size of the gap between the outer side plate and the cover plate.

[0016] In a second aspect, the present application provides a reaction kettle comprising the water sealing device of the first aspect. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 FIG. 1 is a structural schematic diagram of a water sealing device according to an embodiment of the present application;

[0018] Figure 2 A structure diagram of a reaction kettle according to an embodiment of the present application.

[0019] 100 - base plate; 200 - annular groove; 210 - outer side plate; 220 - inner side plate; 300 - cover plate; 400 - annular plug; 500 - baffle; 600 - liquid receiving groove; 700 - annular plate; 800a - first connecting member; 800b - first connecting member; 900 - annular brim;

[0020] 10 - water sealing device; 20 - reaction kettle; 30 - stirring shaft;

[0021] 01 - liquid inlet; 02 - liquid outlet; 03 - liquid discharge port. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0023] Common sealing modes of reaction kettles include water sealing, packing sealing, mechanical sealing, dry gas sealing, etc. Among them, water sealing is one of the sealing modes with the lowest cost, and water has good absorption effect on some toxic substances generated in the reaction, such as ammonia. Regularly replacing the water in the water sealing device or using flowing water can ensure good sealing effect. However, the existing water sealing device includes a rotating ring fixedly connected with the stirring shaft. The rapid rotation of the rotating ring may cause splashing of water in the water sealing device. In addition, rapid pressure abnormalities may occur in the reaction kettle, causing the water in the water sealing device to be squeezed out or even sucked into the reaction kettle, thereby affecting the production environment.

[0024] In view of this, the present application provides a water sealing device for a reaction kettle, Figure 1 A structure diagram of a water sealing device according to an embodiment of the present application is shown in Figure 1 The water sealing device 10 includes a base plate 100, an annular groove 200, a cover plate 300 and a baffle 500. The base plate 100 is used to be fixedly connected to the top of a reaction kettle (not shown in the figure). Specifically, the base plate 100 can be fixedly connected with the top surface of the reaction kettle through a first connecting member 800a. The type of the first connecting member 800a is not limited in the present application, and can be selected according to actual needs. For example, the first connecting member 800a can be a bolt or a screw.

[0025] Continuing to refer to Figure 1The annular groove 200 is provided on the bottom plate 100, and the annular groove 200 is provided with a liquid inlet 01 and a liquid outlet 02. The liquid inlet 01 can be communicated with an external pipeline to supplement the sealing liquid in the annular groove 200, so that a certain amount of sealing liquid is stored in the annular groove 200. The liquid outlet 02 is communicated with an external pipeline to discharge the sealing liquid in the annular groove 200. The cover plate 300 is arranged on the side of the annular groove 200 away from the bottom plate 100, and the cover plate 300 is used for sealing connection with the stirring shaft 30 of the reaction kettle and can rotate with the stirring shaft 30. The surface of the cover plate 300 facing the annular groove 200 is fixedly provided with an annular plug plate 400, and the annular plug plate 400 is used for extending into the sealing liquid in the annular groove 200 to divide the sealing liquid into two parts. Under the action of the positive pressure in the reaction kettle 20, the liquid level of the sealing liquid located at the inner periphery of the annular plug plate 400 decreases, and the liquid level of the sealing liquid located at the outer periphery of the annular plug plate 400 increases, so as to form a pressure difference of the sealing liquid. The above-mentioned pressure difference can resist the positive pressure in the reaction kettle 20 and play a sealing role.

[0026] In some possible embodiments, the stirring shaft 30 and the cover plate 300 are connected through a second connecting piece 800b. The second connecting piece 800b can be a screw or a bolt.

[0027] The annular groove 200 includes an outer side plate 210 and an inner side plate 220, and the outer side plate 210, the inner side plate 220 and the bottom plate 100 can surround to form the annular groove 200. The baffle plate 500 is arranged on the inner wall of the outer side plate 210 of the annular groove 200, and the baffle plate 500 and the annular plug plate 400 have a gap along the radial direction of the annular groove 200. The baffle plate 500 can weaken the circumferential motion of the sealing liquid, help the liquid level of the sealing liquid in the annular groove 200 to be stable, and reduce or avoid the sealing liquid from splashing out of the annular groove 200 or being sucked into the reaction kettle.

[0028] The baffle plate 500 can be an annular baffle plate or a plurality of arc-shaped baffle plates. When the number of the baffle plates 500 is a plurality, the plurality of baffle plates 500 are arranged at intervals along the circumferential direction of the outer side plate 210. Preferably, the spacing between any two adjacent baffle plates 500 is equal, so that the circumferential motion of all the sealing liquid in the annular groove 200 can be more uniformly weakened.

[0029] It can be understood that, along the axial direction of the annular groove 200, the size of the baffle plate 500 is less than or equal to the size of the outer side plate 210, and the specific size of the baffle plate 500 can be set according to actual needs. Figure 1 As shown in the figure, along the axial direction of the annular groove 200, the baffle plate 500 is located in the middle part of the outer side plate 210.

[0030] In some possible embodiments, along the axial direction of the annular groove 200, from the top end of the outer side plate 210 to the bottom end of the outer side plate 210, the dimension of the baffle 500 in the radial direction of the annular groove 200 gradually decreases, so as to further limit the splashing of the sealing liquid in the annular groove 200.

[0031] In some possible embodiments, the top of the outer side plate 210 is provided with an annular brim 900 extending from the connection with the outer side plate 210 to the direction of the annular plug plate 400, and the annular brim 900 has a gap with the annular plug plate 400. The annular brim 900 can limit the outflow of the sealing liquid from the annular groove 200.

[0032] In some possible embodiments, the top of the inner side plate 220 is provided with an annular brim 900 extending from the connection with the inner side plate 220 to the direction of the annular plug plate 400, and the annular brim 900 has a gap with the annular plug plate 400. The annular brim 900 can limit the outflow of the sealing liquid from the annular groove 200.

[0033] Referring to Figure 1 , along the radial direction of the annular groove 200, the gap S between the baffle 500 and the annular plug plate 400 is greater than or equal to 1 mm, so as to avoid the direct contact between the baffle 500 and the annular plug plate 400 due to installation errors or abnormal operation.

[0034] In some possible embodiments, some chemical reactions in the reaction kettle need to be carried out under a certain pressure, for example, the preparation process of the precursor needs to continuously introduce nitrogen to ensure that the material is not oxidized by oxygen, and the reaction kettle is in a micro-positive pressure condition. In order to control the pressure in the reaction kettle to be 0-1.0 KP, the height of the annular groove 200 is greater than or equal to 150 mm, so that the height difference of the sealing liquid between the inner and outer parts of the annular plug plate 400 is greater than or equal to 100 mm. Thus, the annular groove 200 can generate sufficient pressure difference to resist the positive pressure in the reaction kettle, thereby realizing the sealing effect of the reaction kettle under specific pressure conditions.

[0035] In some possible embodiments, the liquid outlet 02 is higher than the liquid inlet 01. As shown in Figure 1 , the liquid outlet 02 can be arranged on the upper portion of the outer side plate 210 of the annular groove 200, and the liquid inlet 01 can be arranged on the lower portion of the outer side plate 210 of the annular groove 200.

[0036] Referring to Figure 1 , the water sealing device 10 further includes a liquid receiving groove 600 arranged around the outer periphery of the annular groove 200. If the pressure in the reaction kettle suddenly rises, the sealing liquid in the annular groove 200 will flow into the liquid receiving groove 600, so as to avoid the direct overflow of the sealing liquid to the top surface of the reaction kettle and affect the production environment.

[0037] The liquid receiving groove 600 is provided with a liquid discharge port 03 for discharging the sealing liquid in the liquid receiving groove 600. The liquid discharge port 03 can be arranged on the side or bottom of the liquid receiving groove 600. When the liquid discharge port 03 is arranged on the side of the liquid receiving groove 600, the liquid discharge port 03 can be arranged at the lower part of the side of the liquid receiving groove 600 to facilitate the discharge of the sealing liquid in the liquid receiving groove 600.

[0038] In some possible embodiments, the liquid receiving groove 600 is higher than the liquid outlet 02 to avoid interference between the liquid receiving groove 600 and the liquid outlet 02.

[0039] In some possible embodiments, the annular groove 200 is coaxially arranged with the cover plate 300, as shown in Figure 1 The center axis of the annular groove 200 and the cover plate 300 is L.

[0040] The water sealing device 10 further includes an annular plate 700 fixed to the surface of the cover plate 300 facing the annular groove 200. The radial distance L1 between the annular plate 700 and the center axis of the annular groove 200 is greater than the radial distance L2 between the outer side plate 210 and the center axis of the annular groove 200. Therefore, the annular plate 700 and the cover plate 300 form a protective cover that can prevent foreign matter from falling into the annular groove 200.

[0041] It can be understood that, when the water sealing device 10 in the present application further includes the liquid receiving groove 600, the radial distance L1 between the annular plate 700 and the center axis of the annular groove 200 is greater than the radial distance L3 between the outer circumferential wall of the liquid receiving groove 600 and the center axis of the annular groove 200, thereby preventing foreign matter from falling into the liquid receiving groove 600 or the annular groove 200 and avoiding contamination of the sealing liquid by foreign matter, so that the sealing liquid can be recycled.

[0042] The annular plate 700 can be arranged at the edge of the cover plate 300. Optionally, the annular plate 700 and the cover plate 300 are perpendicular to each other. Optionally, the annular plate 700 and the cover plate 300 can be integrally formed or fixed by welding or screwing.

[0043] Referring to Figure 1 , along the axial direction of the annular groove 200, the height of the annular plate 700 is greater than or equal to the size of the gap between the outer side plate 210 and the cover plate 300, thereby better preventing external foreign matter from entering the annular groove 200.

[0044] Based on the same technical concept, the present application further provides a reaction kettle, Figure 2 is a structural schematic view of the reaction kettle of an embodiment of the present application. Referring to Figure 2The reaction kettle 20 comprises the water sealing device 10 in various possible embodiments of the present application. The water sealing device 10 is arranged on the top surface of the reaction kettle 20, and the two can be fixed through the first connecting member 800a. The first connecting member 800a is preferably a detachable connecting member, facilitating maintenance of the reaction kettle 20 or the water sealing device 10.

[0045] In the present application, the type of the reaction kettle 20 is not limited. The reaction kettle 20 can be used for preparation of precursors or ternary positive electrode materials, and can also be used for preparation of other chemical substances or biological products.

[0046] When the reaction kettle 20 is used for preparation of ternary positive electrode materials, the reaction raw materials include complexing agents such as ammonia or ammonium sulfate. Under the temperature conditions (50-70℃) of the reaction, ammonia molecules are prone to volatilize to generate ammonia gas, which can escape from the stirring port to the environment, polluting the environment and harming the health of employees. In addition, metal foreign matters cannot be mixed in the above chemical reaction. Some existing stirring sealing devices have a high risk of generating metal foreign matters because the stirring shaft 30 needs to rotate quickly.

[0047] The reaction kettle 20 in the present application comprises the water sealing device 10 in various possible embodiments of the present application, which can play a good sealing role, and the baffle 500 added in the annular groove 200 helps to stabilize the liquid level of the sealing liquid in the annular groove 200, avoiding splashing of the sealing liquid. In addition, the sealing liquid is usually water, and the overall investment cost of the water sealing device 10 is low, and metal foreign matters are avoided.

[0048] In some possible embodiments, the stirring shaft 30 and the cover plate 300 of the water sealing device 10 are connected through the second connecting member 800b. The second connecting member 800b can be a screw or a bolt, and specific limitations are not made. In addition, the connection between the stirring shaft 30 and the cover plate 300 is provided with a sealing material, so that the connection between the two is kept in good sealing.

[0049] Obviously, those skilled in the art can make various modifications and variations to the embodiments of the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application belong to the scope of the claims of the present application and their equivalent technologies, the present application also intends to include these modifications and variations.

Claims

1. A water seal device for a reaction vessel, characterized by, The water seal device comprises: a bottom plate for being fixed to the top of the reactor; a ring-shaped groove provided on the bottom plate, the ring-shaped groove being provided with a liquid inlet and a liquid outlet; a cover plate provided on the side of the ring-shaped groove away from the bottom plate, the cover plate being used for being sealingly connected with the stirring shaft of the reactor, a ring-shaped insert plate being fixed to the surface of the cover plate facing the ring-shaped groove, the ring-shaped insert plate being used for being inserted into the sealing liquid in the ring-shaped groove; a baffle provided on the inner wall of the outer side plate of the ring-shaped groove along the radial direction of the ring-shaped groove, the baffle having a gap with the ring-shaped insert plate.

2. The water sealing device of claim 1, wherein, The number of baffles is multiple, and the multiple baffles are arranged at intervals along the circumferential direction of the outer side plate.

3. The water sealing device of claim 1, wherein, In the direction from the top end of the outer side plate to the bottom end of the outer side plate, the size of the baffle along the radial direction of the ring-shaped groove gradually decreases.

4. The water sealing device of claim 3, wherein, Along the radial direction of the ring-shaped groove, the distance between the baffle and the ring-shaped insert plate is greater than or equal to 1 mm.

5. The water sealing device of claim 1, wherein, The height of the ring-shaped groove is greater than or equal to 150 mm; and / or, the liquid outlet is higher than the liquid inlet.

6. The water sealing device of claim 1, wherein, The water seal device further comprises a liquid receiving groove, the liquid receiving groove being arranged around the outer periphery of the ring-shaped groove.

7. The water sealing device of claim 6, wherein, The liquid receiving groove is provided with a liquid outlet; and / or, the liquid receiving groove is higher than the liquid outlet.

8. The water sealing device according to any one of claims 1-7, characterized in that, The ring-shaped groove and the cover plate are coaxially arranged; The water seal device further comprises a ring-shaped plate, the ring-shaped plate being fixed to the surface of the cover plate facing the ring-shaped groove, the radial distance between the ring-shaped plate and the central axis of the ring-shaped groove being greater than the radial distance between the outer side plate and the central axis of the ring-shaped groove.

9. The water-tight device according to claim 8, characterized in that, Along the axial direction of the ring-shaped groove, the height of the ring-shaped plate is greater than or equal to the size of the gap between the outer side plate and the cover plate.

10. A reaction vessel, characterized by, The water seal device comprises any one of claims 1-9.

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