A special reactor for double decomposition

Abstract

The utility model discloses a kind of special reaction kettle for complex decomposition, including pedestal bottom cylinder, erecting the upper cylinder body in pedestal bottom cylinder top, the center cylinder body in the inner cavity of upper cylinder body and with upper cylinder body form clamping cavity and the forced circulation pump of driving mother liquor circulation flow;In the top of upper cylinder body, there is the movable cover of sealing cover, the center position of movable cover is provided with feeding hole;Flow guide cylinder is fixed with welding below movable cover, the lower end outlet of flow guide cylinder is towards the top opening of center cylinder body;Center cylinder body and upper cylinder body clamping cavity are communicated by top opening, center cylinder body bottom is communicated with product discharge port, product discharge port extends to upper cylinder body outside;Forced circulation pump is connected with circulation pipeline, circulation pipeline is communicated at one end with center cylinder body, at the other end with upper cylinder body communication.This new type makes solid material can be fully contacted with mother liquor and complete dissolution, to reduce raw material unit consumption, realize the full use of potassium ion, sulfate ion and other resources in raw material.

Description

Technical Field

[0001] This utility model relates to reaction vessels, and more particularly to a reaction vessel specifically designed for metathesis. Background Technology

[0002] In metathesis conversion processes such as potassium sulfate, mother liquor recycling is a core step in achieving efficient resource recovery, cost reduction, and wastewater discharge reduction. By returning the secondary mother liquor after separating the main product (potassium sulfate) to the front end of the process and having it participate in the reaction again, the utilization rate of raw materials (potassium ions and sulfate ions) can be improved, while avoiding resource waste and environmental pressure caused by direct discharge of mother liquor. However, in existing technologies, metered solid materials (such as potassium chloride, ammonium sulfate, magnesium sulfate, sodium sulfate, etc.) are added to the reactor at the front end of the metathesis process. The secondary mother liquor after the separation of main and by-products is usually directly pumped into the reactor to contact the solid materials. Because the secondary mother liquor fails to circulate in the reactor at the front end of the process, the circulation volume of the mother liquor is small, resulting in insufficient stirring and mixing capacity in the reactor. The solid materials cannot be fully dissolved and come into contact with the mother liquor, which further leads to poor reuse of resources such as potassium ions and sulfate ions. Utility Model Content

[0003] To address the shortcomings of the aforementioned technologies, this invention provides a special reaction vessel for metathesis.

[0004] To solve the above technical problems, the technical solution adopted by this utility model is: a special reaction vessel for metathesis, including a base bottom cylinder, an upper cylinder mounted above the base bottom cylinder, a central cylinder located in the inner cavity of the upper cylinder and forming a clamping cavity with the upper cylinder, and a forced circulation pump for driving the mother liquor to circulate. A movable cover is sealed at the top of the upper cylinder, and a feeding hole is provided at the center of the movable cover. A guide tube is welded and fixed below the movable cover. When the movable cover is closed on the upper cylinder, the lower outlet of the guide tube opens towards the top of the central cylinder. The central cylinder is connected to the clamping cavity of the upper cylinder through the top opening, and the bottom of the central cylinder is connected to the product outlet, which extends to the outside of the upper cylinder. The forced circulation pump is connected to a circulation pipeline, which is connected to the central cylinder at one end and to the upper cylinder at the other end.

[0005] Preferably, the upper cylinder is supported on the base cylinder by an upper cylinder bracket, and the upper cylinder and the base cylinder are welded and fixed at the contact position.

[0006] Preferably, multiple reinforcing ribs are welded and fixed around the outer wall of the upper cylinder.

[0007] Preferably, the inner wall of the upper cylinder and the outer wall of the central cylinder are both fixed with supporting lugs, and the supporting lugs between the two are fixedly connected by connecting ring plates.

[0008] Preferably, a central cylinder support is also fixed between the bottom of the central cylinder and the bottom of the upper cylinder.

[0009] Preferably, a titanium coil is coiled along the inner wall of the upper cylinder in the inner cavity of the upper cylinder, and the ends of the titanium coil extending out of the upper cylinder are respectively set as coil inlet and coil outlet.

[0010] Preferably, a coil fixing bracket is welded and fixed to the inner wall of the upper cylinder, and the titanium coil is fixed to the coil fixing bracket by U-shaped fixing clamps and bolts.

[0011] Preferably, a support bracket is fixedly provided along the top periphery of the central cylinder.

[0012] Preferably, the support bracket has multiple sets of support lugs and connecting rings spaced apart along the circumferential direction between the upper cylinder and the central cylinder.

[0013] Preferably, the upper cylinder is provided with a side cover manhole and a sample release port on its side wall, and the movable cover is provided with a top cover manhole.

[0014] This utility model discloses a special reaction vessel for metathesis. Through the specific spatial distribution of the base cylinder, upper cylinder, and central cylinder, combined with a forced circulation pump, the secondary mother liquor and the original mother liquor in the vessel circulate at a high flow rate through the solid materials (such as potassium chloride, ammonium sulfate, magnesium sulfate, sodium sulfate, etc.) in the reaction vessel. This allows the solid materials to fully contact and dissolve with the mother liquor, thereby reducing the consumption of raw materials and making full use of resources such as potassium ions and sulfate ions in the raw materials. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0016] Figure 2 for Figure 1 Top view of the movable cover.

[0017] Figure 3 for Figure 1 A magnified schematic diagram of the structure at point A in the middle.

[0018] In the diagram: 1. Base bottom cylinder; 2. Upper cylinder; 3. Movable cover; 4. Clamping cavity; 5. Side cover manhole; 6. Titanium coil; 7. Central cylinder; 8. Support bracket; 9. Guide tube; 10. Feeding hole; 11. Top cover manhole; 12. Reinforcing rib; 13. Connecting ring plate; 14. Support ear plate; 15. Coil outlet; 16. Sampling port; 17. Coil inlet; 18. Coil bracket; 19. Forced circulation pump; 20. Circulation pipeline; 21. Discharge port; 22. Upper cylinder bracket; 23. Central cylinder bracket; 24. Overflow outlet; 25. Circulating mother liquor sampling port; 26. U-shaped fixing hoop. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0020] Example

[0021] This embodiment discloses a special reaction vessel for metathesis, the overall structure of which is as follows: Figure 1 As shown, the main structural components include: a base cylinder 1 that serves as the foundation of the base structure, an upper cylinder 2 that is mounted above the base cylinder 1, a central cylinder 7 located in the inner cavity of the upper cylinder 2 and forming a clamping cavity 4 with the upper cylinder 2, and a forced circulation pump 19 for driving the mother liquor circulation flow. The base bottom cylinder 1 is supported by a base structure and multiple sets of upper cylinder supports 22. The upper cylinder supports 22 are welded and fixed to the bottom of the upper cylinder 2 after avoiding the circulation pipe 20 and other structures, so that the upper cylinder 2 is supported by the upper cylinder supports 22. Furthermore, the cylinder 2 and the base bottom cylinder 1 are welded and fixed at the contact position, thereby forming the external cylinder structure of the reactor in this embodiment.

[0022] Preferably, multiple reinforcing ribs 12 can be welded and fixed around the outer wall of the upper cylinder 2 to enhance the structural strength of the reactor cylinder.

[0023] Inside the upper cylinder 2, a central cylinder 7 is installed. First, support ear plates 14 are welded and fixed on the inner wall of the upper cylinder 2 and the outer wall of the central cylinder 3. Then, the support ear plates 14 between the two are welded and fixed together by connecting ring plates 13, thereby fixing the central cylinder 7 inside the upper cylinder 2. Based on the setting of the central cylinder 7, a clamping cavity 4 is formed between the upper cylinder 2 and the central cylinder 3.

[0024] Multiple sets of supporting ear plates 14 and connecting ring plates 13 are arranged at intervals along the circumference, and gaps are left between adjacent supporting ear plates 14 and connecting ring plates 13, so as not to affect the communication between the top opening of the central cylinder 7 and the clamping cavity 4 of the upper cylinder 2.

[0025] Secondly, in order to improve the stability of the central cylinder 7, a central cylinder support 23 is fixed between the bottom of the central cylinder 3 and the bottom of the upper cylinder 2. The central cylinder support 23 plays the role of supporting the central cylinder 3. Together with the supporting ear plate 14 and the connecting ring plate 13, the central cylinder 3 is stably set in the upper cylinder 2.

[0026] At the top opening of the upper cylinder 2, a movable cover 3 is sealed and closed. The movable cover 3 can be detachably sealed and closed onto the upper cylinder 2 using structures such as gaskets, spring washers, flanges, and bolts.

[0027] Preferably, a support bracket 8 can be fixedly installed along the top periphery of the central cylinder 7 to strengthen the support of the upper movable cover 3 and other structures; multiple sets of support brackets 8 should also be installed at intervals along the circumference so that there is enough gap between adjacent support brackets 8 so as not to affect the communication between the top opening of the central cylinder 7 and the clamping cavity 4 of the upper cylinder 2.

[0028] Furthermore, a feeding hole 10 is provided at the center of the movable cover 3, which is used for feeding the raw materials for the metathesis reaction.

[0029] Preferably, a cover can be installed at the feeding hole 10. The cover can be installed at the feeding hole 10 by means of threaded connection or sealing gasket insertion connection, so as to facilitate opening and closing. The cover can be designed with a transparent window to facilitate viewing the internal condition of the central cylinder 7.

[0030] Furthermore, the movable cover 3 is also equipped with a top cover manhole 11 and multiple interfaces, which can be temperature detection ports, pressure detection ports, safety pressure relief ports, etc., and the number and type of interfaces can be set according to specific reaction requirements. Figure 2 As shown, the movable cover 3 is provided with grid-shaped reinforcing ribs to avoid the feeding hole, the top cover manhole 11, the interface and other structures.

[0031] Furthermore, a guide tube 9 is welded and fixed below the movable cover 3, so that the lower outlet of the guide tube 9 faces the top opening of the central cylinder 7; thereby, the metered raw materials (such as solid materials and mother liquor) can smoothly enter the inner cavity of the central cylinder 7 under the guiding action of the guide tube 9.

[0032] The forced circulation pump 19 is connected to the circulation pipeline 20, which is set up based on the support of the base cylinder 1. The extended part of the circulation pipeline is connected to the forced circulation pump 19. The secondary mother liquor after the separation of main and by-products is pumped into the circulation pipeline by the forced circulation pump 19 as the circulation replenishment mother liquor. The circulation pipeline 20 is connected to the bottom interface of the central cylinder 7 at one end and to the bottom interface of the upper cylinder 2 at the other end.

[0033] The mother liquor is pushed into the clamping cavity 4 by the forced circulation pump 19 through the circulation pipeline 20, and then overflows into the central cylinder 7 through the gap between the support ear plate 14, the connecting ring plate 13 and the support bracket 8. It mixes with the original mother liquor and flows through the fixed material, and then flows out from the bottom of the central cylinder 7 and flows through the circulation pipeline 20 again. In this way, the mother liquor is circulated to fully contact and dissolve the solid material. After the current metathesis conversion process is completed, the product is discharged from the product outlet 21 at the bottom of the central cylinder 7. The metered solid material and mother liquor are added again, and the next round of circulating mother liquor is pumped in.

[0034] Under the action of the forced circulation pump 19, the mother liquor can circulate in a large flow rate through the circulation pipeline 20, the clamping cavity 4 and the central cylinder 7. Through the forced circulation and guidance, the mother liquor can fully contact the solid materials (such as potassium chloride, ammonium sulfate, magnesium sulfate, sodium sulfate, etc.) and effectively dissolve the solid materials, thereby reducing the consumption of raw materials and making full use of resources such as potassium ions and sulfate ions in the raw materials.

[0035] The circulation flow rate of the mother liquor can be determined based on the specific volume of the reactor and the flow rate of the selected forced circulation pump (e.g., a circulation flow rate of 3000-5000 m³). 3 The flow rate of the pump is regulated.

[0036] The product outlet 21 extends outside the upper cylinder 2 to facilitate the delivery of the metathesis product to the downstream process.

[0037] Furthermore, as a preferred embodiment, in order to meet the heating requirements of the metathesis process, a titanium coil 6 is provided in the inner cavity of the upper cylinder 7 of the reactor in this embodiment. The ends of the titanium coil 6 extending outside the upper cylinder 2 are respectively set as coil inlet 17 and coil outlet 15 for the flow of heat transfer liquid to realize the heating of the mother liquor in the reactor.

[0038] For specific temperature control, the settings can be made according to the specific heat capacity of the heat transfer fluid and the temperature detection data of the temperature sensor.

[0039] The titanium coil 6 is specifically wound and mounted on the inner wall of the upper cylinder 2 via a coil support 18, a U-shaped fixing clamp 26, and other structures. Specifically, the coil support 18 is welded and fixed to the inner wall of the upper cylinder 2. Figure 3 As shown, the titanium coil 6 is then locked and fixed to the coil support 18 by U-shaped fixing clamps 26, spirals, and other structures.

[0040] Considering the corrosiveness of the mother liquor, structures that need to be in contact with the mother liquor for a long time, such as the central cylinder, upper cylinder, titanium coil 6, and central cylinder support 23, can be made of titanium steel. Titanium steel has excellent corrosion resistance and can form a passivation film on its surface, thereby effectively resisting the corrosive effects of the mother liquor.

[0041] In addition, preferably, a side cover manhole 5 for easy maintenance is provided on the side wall of the upper cylinder 2, a sample outlet 16 is also provided on the side wall of the upper cylinder 2, and a circulating mother liquor sampling port 25 is provided on the circulation pipeline 20, etc.

[0042] It should be noted that valves are installed at the product outlet 21, coil inlet / outlet, sample outlet 16, and circulating mother liquor sampling outlet 25 to control the opening and closing of the pipeline and ensure the smooth operation of the metathesis conversion process in this reactor.

[0043] In summary, the double decomposition reactor disclosed in this utility model, through the design of the jacket cavity, overflow principle, circulation pipeline, and forced circulation pump, enables the mother liquor to circulate within the jacket cavity, circulation pipeline, and central cylinder, effectively improving the stirring and mixing capacity within the central cylinder. This allows the mother liquor to fully contact the solid raw materials and increases the solubility of the solid raw materials in the mother liquor, thereby further reducing the raw material consumption and achieving full utilization of resources such as potassium ions and sulfate ions in the raw materials.

[0044] The above embodiments are not intended to limit the present utility model, nor is the present utility model limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the technical solution of the present utility model are also within the protection scope of the present utility model.

Claims

1. A special reaction vessel for metathesis, characterized in that: It includes a base bottom cylinder (1), an upper cylinder (2) mounted above the base bottom cylinder (1), a central cylinder (7) located in the inner cavity of the upper cylinder (2) and forming a clamping cavity (4) with the upper cylinder (2), and a forced circulation pump (19) that drives the mother liquor to circulate. A movable cover (3) is sealed at the top of the upper cylinder (2), and a feeding hole (10) is provided at the center of the movable cover (3). A guide tube (9) is welded and fixed below the movable cover (3). When the movable cover (3) is closed on the upper cylinder (2), the lower end outlet of the guide tube (9) opens towards the top of the central cylinder (7). The central cylinder (7) is connected to the clamping cavity (4) of the upper cylinder (2) through the top opening. The bottom of the central cylinder (7) is connected to the product outlet (21), which extends to the outside of the upper cylinder (2). The forced circulation pump (19) is connected to a circulation pipeline (20), which is connected to the central cylinder (7) at one end and to the upper cylinder (2) at the other end.

2. The metathesis reactor according to claim 1, characterized in that: The upper cylinder (2) is supported on the base bottom cylinder (1) by the upper cylinder bracket (22), and the upper cylinder (2) and the base bottom cylinder (1) are welded and fixed at the contact position.

3. The metathesis reactor according to claim 1, characterized in that: The outer wall of the upper cylinder (2) is welded with multiple reinforcing ribs (12).

4. The metathesis reactor according to claim 1, characterized in that: The inner wall of the upper cylinder (2) and the outer wall of the central cylinder (7) are both fixed with support ear plates (14), and the support ear plates (14) between the two are fixedly connected by connecting ring plates (13).

5. The metathesis reactor according to claim 4, characterized in that: A central cylinder support (23) is also fixed between the bottom of the central cylinder (7) and the bottom of the upper cylinder (2).

6. The metathesis reactor according to claim 1, characterized in that: In the inner cavity of the upper cylinder (2), a titanium coil (6) is coiled along the inner wall of the upper cylinder (2). The ends of the titanium coil (6) extending to the outside of the upper cylinder (2) are respectively set as coil inlet (17) and coil outlet (15).

7. The metathesis reactor according to claim 6, characterized in that: A coil fixing bracket (18) is welded and fixed to the inner wall of the upper cylinder (2), and the titanium coil (6) is fixed to the coil fixing bracket (18) by a U-shaped fixing hoop (26) and bolts.

8. The metathesis reactor according to claim 4, characterized in that: A support bracket (8) is fixedly installed along the top periphery of the central cylinder (7).

9. The metathesis reactor according to claim 8, characterized in that: The support bracket (8) has multiple sets of support ear plates (14) and connecting ring plates (13) arranged at intervals along the circumferential direction between the upper cylinder (2) and the central cylinder (7).

10. The metathesis reactor according to claim 1, characterized in that: The upper cylinder (2) is provided with a side cover manhole (5) and a sample release port (16) on its side wall, and the movable cover (3) is provided with a top cover manhole (11).

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