Reagent catalyst dropwise adding device

Abstract

The application provides a reagent catalyst dropping device, belonging to the field of catalyst dropping. The reagent catalyst dropping device comprises a storage tank installed on the top of a base for carrying catalyst, wherein the bottom of the storage tank is provided with a bidirectional peristaltic pump for conducting catalyst and a dropping pipeline thereof, the end surface of the dropping pipeline is provided with a nitrogen back flushing device for back flushing residual liquid, and the start surface of the dropping pipeline is provided with a recovery tank for collecting residual liquid. According to the application, the double-layer structure of the storage tank is matched with the spiral ring heat circulation oil pipe, and the heat preservation sleeve of the dropping pipeline is designed, so that the crystallization of the reagent catalyst due to temperature fluctuation is effectively prevented, and the activity and fluidity of the reagent catalyst are ensured. The nitrogen back flushing device is switched through an electromagnetic valve, the residual liquid in the pipeline is back flushed by using the compressed nitrogen gas in the first branch pipe, the residual liquid is recovered to the recovery tank through the second branch pipe, and the blockage problem caused by the crystallization of the residual liquid in the pipeline is prevented.

Description

Technical Field

[0001] This application relates to the field of catalyst dropping, and more specifically, to a reagent catalyst dropping device. Background Technology

[0002] In the synthesis of organoboron antifouling agents (such as KM-2, KM-3, and KM-4), the addition of reagents and catalysts is a key factor affecting reaction stability, product yield, and safety.

[0003] Chinese patent application number 202122765727.7 discloses a quantitative addition device for catalyst preparation, comprising a reaction vessel body and a fixing frame. The fixing frame is disposed on one side of the reaction vessel body, and a rotation control structure is provided on the fixing frame. The rotation control structure is provided with a quantitative feeding structure. This utility model relates to the field of catalyst preparation technology. The catalyst raw materials and corresponding masses of water are introduced into the reaction vessel body, and the mixture is stirred. During the stirring process, the quantitative feeding structure is activated to sequentially and quantitatively add various required liquid reagents. The structure is simple, has good continuity, and can be remotely controlled by the operator. At the same time, during the feeding process, the various liquid reagents and the reaction mixture are stirred, resulting in high operating efficiency and good safety.

[0004] The above-mentioned scheme has the following shortcomings: When the existing device is used, it uses a quantitative feeding structure to sequentially feed various required liquid reagents in a quantitative manner. However, in the synthesis process of diphenylboronic acid aminoethanol ester, the wet product needs to be recrystallized from ethanol. It needs to be heated to reflux and then cooled to 10°C for crystallization. This indicates that the solubility of this substance is significantly reduced at low temperatures, and it is easy to precipitate crystals from the solution. However, the existing device is not convenient for cleaning the dripping pipeline. When the residual liquid remains in the pipeline, if the ambient temperature is lower than its crystallization temperature, it is very easy to precipitate solid particles due to the decrease in solubility, which gradually accumulate and cause pipeline blockage. Utility Model Content

[0005] To overcome the above shortcomings, this application provides a reagent catalyst dripping device, which aims to improve the problem of solid particles easily precipitating from residual liquid in the pipeline, causing pipeline blockage.

[0006] This application provides a reagent catalyst dripping device, including a storage tank installed on the top of a base for carrying the catalyst. The bottom of the storage tank is provided with a bidirectional peristaltic pump for conducting the catalyst and its dripping pipe. The end surface of the dripping pipe is provided with a nitrogen backflushing device for backflushing residual liquid, and the beginning surface of the dripping pipe is provided with a recovery tank for collecting residual liquid.

[0007] In one specific implementation, the storage tank adopts a double-layer design, wherein the outer layer is an insulation layer and the inner layer is a heat-conducting layer.

[0008] In the above process, the temperature of the reagent catalyst is maintained during storage by means of a storage tank.

[0009] In one specific implementation, a hot circulating oil pipe is provided in the interlayer of the storage tank, a heating box is fixedly installed on the top of the base, and a circulating pump connected to the hot circulating oil pipe is fixedly installed on the top of the heating box.

[0010] In the above process, the storage tank is heated through a hot circulating oil pipe.

[0011] In one specific embodiment, a gas tank for loading nitrogen is installed on one side of the nitrogen backflushing device, wherein the top of the nitrogen backflushing device is provided with a first branch pipe connected to the end of the dripping pipe.

[0012] In the above implementation process, when switching backflush state through the first branch pipe, compressed nitrogen can be transmitted to the dripping pipe through the first branch pipe to perform backflush operation.

[0013] In one specific implementation, the top of the recovery tank is provided with a second branch pipe that is connected to the beginning of the dripping pipe.

[0014] In the above process, when switching backflushing state, the residual liquid can be recovered into the recovery tank through the second branch pipe.

[0015] In one specific implementation, the storage tank is equipped with a temperature sensing device and an addition tube for adding reactants.

[0016] In the above process, the temperature inside the storage tank is detected in real time by a temperature recognition device.

[0017] In one specific implementation, the hot circulating oil pipes within the storage tank jacket are arranged in a circumferential configuration, and the heating box is equipped with a temperature control panel.

[0018] In the above process, the oil is heated by circulating it in the hot oil pipe to ensure that the temperature in the storage tank matches the temperature requirements of the reagent catalyst.

[0019] In one specific implementation, electromagnetic control valves are installed at the connection points of the first branch pipe and the second branch pipe with the dripping pipe, and electromagnetic control valves are also installed at the connection points of the dripping pipe with the discharge end of the storage tank and at the end of the dripping pipe.

[0020] In the above implementation process, it is convenient to control the opening and closing of the branch through electromagnetic control valves to adjust the dripping state and backflushing state.

[0021] In one specific implementation, the surface of the dripping pipe is covered with an insulating sleeve.

[0022] In the above process, the dripping pipeline is insulated with a heat-insulating jacket to prevent rapid temperature drop from causing crystallization before backflushing.

[0023] In one specific implementation, a dripping head is installed at the end of the dripping pipe.

[0024] In the above implementation process, the dispensing head is detachable, making it easy to replace different dispensing heads to meet different dispensing needs.

[0025] Compared with the prior art, the beneficial effects of this application are as follows: the double-layer structure of the storage tank, combined with the spiral hot circulation oil pipe and the heat insulation sleeve design of the dripping pipe, effectively prevents the reagent catalyst from crystallizing due to temperature fluctuations, ensuring its activity and fluidity. The nitrogen backflushing device is switched by an electromagnetic valve, using the compressed nitrogen in the first branch pipe to backflush the pipe residue, and the second branch pipe to recover the residual liquid to the recovery tank, preventing the blockage problem caused by the crystallization of residual liquid in the pipe. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the external structure provided in the embodiments of this application;

[0028] Figure 2 Provided for the implementation of this application Figure 1 Enlarged structural diagram at point A in the middle;

[0029] Figure 3 A side view structural diagram provided for an embodiment of this application;

[0030] Figure 4 A top view of the structure provided for an embodiment of this application;

[0031] Figure 5 A rear view structural diagram provided for an embodiment of this application;

[0032] Figure 6 Provided for the implementation of this application Figure 5 Enlarged structural diagram at point B;

[0033] Figure 7A schematic diagram of the internal structure of the storage tank provided for an embodiment of this application;

[0034] Figure 8 A schematic diagram of the nitrogen backflushing device provided in the embodiments of this application.

[0035] In the diagram: 1. Base; 2. Storage tank; 21. Temperature recognition device; 22. Addition pipe; 23. Dropping pipe; 24. Two-way peristaltic pump; 25. Dropping head; 3. Heating box; 31. Circulation pump; 32. Hot circulating oil pipe; 4. Nitrogen backflushing device; 41. Gas tank; 42. First branch pipe; 43. Second branch pipe; 44. Recovery tank. Detailed Implementation

[0036] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0037] Please see Figure 1-8 This application provides a reagent catalyst dropping device, including a storage tank 2 mounted on top of a base 1 for supporting the catalyst. The base 1 is welded from a thickened stainless steel plate and its surface is sandblasted to ensure stable placement. The storage tank 2 is equipped with a temperature recognition device 21 and an addition tube 22 for adding the reactant. The temperature recognition device 21 uses a high-precision platinum resistance temperature sensor to detect the temperature inside the storage tank 2 in real time and feed it back to the control system. The top of the addition tube 22 is equipped with a silicone sealing cap, which is threaded to the tube opening to prevent external impurities from entering. The end of the addition tube 22 extends to the middle of the storage tank 2 to facilitate uniform mixing of the reactant.

[0038] Storage tank 2 adopts a double-layer structure. The outer layer is made of 50mm thick polyurethane foam insulation layer, which can effectively reduce heat loss. The inner layer is made of 316L stainless steel thermal conductive layer, which has excellent corrosion resistance and thermal conductivity. The double-layer design ensures the temperature stability of the reagent catalyst during storage. A hot circulation oil pipe 32 is installed in the interlayer of storage tank 2. The hot circulation oil pipe 32 is made of bent copper and is arranged in a spiral around the inner wall of storage tank 2 to ensure uniform heating. The heating box 3 is fixedly installed on the top of the base 1 by bolts. The top of the heating box 3 is fixedly installed with a circulation pump 31 connected to the hot circulation oil pipe 32. The circulation pump 31 drives the heat transfer oil in the heating box 3 to circulate in the hot circulation oil pipe 32, realizing precise temperature control of the reagent catalyst in storage tank 2. The heating box 3 is equipped with a digital temperature control panel, which can set the temperature range.

[0039] At the bottom center of the storage tank 2, there is a bidirectional peristaltic pump 24 for conducting catalyst and its dripping pipe 23. The bidirectional peristaltic pump 24 is fixed on the base 1 by a bracket, which can precisely control the flow range and ensure stable dripping speed. The surface of the dripping pipe 23 is wrapped with a layer of aluminum silicate cotton insulation sleeve, and the insulation sleeve is covered with an aluminum foil reflective layer. The insulation sleeve continuously insulates the dripping pipe 23 to prevent the reagent catalyst from crystallizing and blocking the pipe before backflushing due to rapid temperature drop.

[0040] The end surface of the dripping pipe 23 is provided with a nitrogen backflush device 4 for backflushing residual liquid. A gas cylinder 41 for loading nitrogen is installed on one side of the nitrogen backflush device 4 via a bracket. The gas cylinder 41 is a high-pressure seamless steel cylinder, equipped with a pressure reducing valve and a pressure gauge, which can stably output compressed nitrogen at 0.2-0.5MPa. The top of the nitrogen backflush device 4 is provided with a first branch pipe 42 that is connected to the end of the dripping pipe 23. The first branch pipe 42 is made of stainless steel and its diameter is adapted to the dripping pipe 23. When switching backflush states, the compressed nitrogen can be quickly conducted into the dripping pipe 23 through the first branch pipe 42 to thoroughly backflush the reagent catalyst remaining on the pipe wall.

[0041] Electromagnetic control valves are installed at the connection points of the first branch pipe 42 and the second branch pipe 43 with the dripping pipe 23. Electromagnetic control valves are also installed at the connection point between the dripping pipe 23 and the drain end of the storage tank 2, as well as at the end of the dripping pipe 23. By controlling the linkage of the opening and closing of each electromagnetic valve, precise and rapid switching between dripping and backflushing states can be achieved, avoiding interference between the two states. A dripping head 25 is threadedly installed at the end of the dripping pipe 23 and can be quickly disassembled and installed, facilitating the replacement of different dripping heads 25 to meet different dripping volume and speed requirements according to experimental needs.

[0042] The starting end of the dripping pipe 23 is provided with a recovery tank 44 for collecting residual liquid. The top is provided with a second branch pipe 43 connected to the starting end of the dripping pipe 23. The second branch pipe 43 is also made of stainless steel and has a diameter slightly larger than that of the dripping pipe 23. When switching backflushing mode, the residual liquid generated during the backflushing process can be efficiently recovered into the recovery tank 44 through the second branch pipe 43, reducing reagent waste and environmental pollution.

[0043] The working principle of this reagent catalyst dripping device is as follows: When the device is working, the storage tank 2 achieves temperature stability through a double-layer structure and a spirally wound hot circulation oil pipe 32 in the interlayer, under the action of the heating box 3 and the circulation pump 31. The temperature recognition device 21 provides real-time feedback on the temperature inside the tank. During dripping, the reagent catalyst in the storage tank 2 is transported to the dripping pipe 23 by a bidirectional peristaltic pump 24 and dripped through the end dripping head 25. The insulation sleeve outside the dripping pipe 23 prevents reagent crystallization. After dripping, the control system switches the electromagnetic control valve, and the nitrogen backflushing device 4 introduces the compressed nitrogen from the gas tank 41 into the dripping pipe 23 through the first branch pipe 42 to backflush the residual liquid on the pipe wall. The residual liquid generated by backflushing is collected in the recovery tank 44 through the second branch pipe 43. The precise switching between dripping and backflushing states is achieved through valve linkage. The addition pipe 22 is used to replenish the reactant to the storage tank 2.

[0044] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A reagent catalyst dropping device, characterized in that, It includes a storage tank (2) installed on top of the base (1) for carrying the catalyst, wherein the bottom of the storage tank (2) is provided with a bidirectional peristaltic pump (24) for conducting the catalyst and its dripping pipe (23), the end surface of the dripping pipe (23) is provided with a nitrogen backflush device (4) for backflushing the residual liquid, and the beginning surface of the dripping pipe (23) is provided with a recovery tank (44) for collecting the residual liquid.

2. The reagent catalyst dropping device according to claim 1, characterized in that, The storage tank (2) adopts a double-layer design, with the outer layer being an insulation layer and the inner layer being a heat-conducting layer.

3. The reagent catalyst dropping device according to claim 2, characterized in that, A hot circulating oil pipe (32) is provided in the interlayer of the storage tank (2), and a heating box (3) is fixedly installed on the top of the base (1). A circulating pump (31) connected to the hot circulating oil pipe (32) is fixedly installed on the top of the heating box (3).

4. The reagent catalyst dropping device according to claim 3, characterized in that, A gas tank (41) for loading nitrogen is installed on one side of the nitrogen backflush device (4), and a first branch pipe (42) connected to the end of the dripping pipe (23) is provided at the top of the nitrogen backflush device (4).

5. The reagent catalyst dropping device according to claim 4, characterized in that, The top of the recycling tank (44) is provided with a second branch pipe (43) that is connected to the beginning of the dripping pipe (23).

6. The reagent catalyst dropping device according to claim 5, characterized in that, The storage tank (2) is equipped with a temperature recognition device (21) and an addition tube (22) for adding reactants.

7. The reagent catalyst dropping device according to claim 6, characterized in that, The hot circulating oil pipe (32) in the interlayer of the storage tank (2) is arranged in a ring, and the heating box (3) is equipped with a temperature control panel.

8. The reagent catalyst dropping device according to claim 7, characterized in that, Electromagnetic control valves are provided at the connection points of the first branch pipe (42) and the second branch pipe (43) with the dripping pipe (23). Electromagnetic control valves are also provided at the connection points of the dripping pipe (23) with the drain end of the storage tank (2) and at the end of the dripping pipe (23).

9. The reagent catalyst dropping device according to claim 8, characterized in that, The surface of the dripping pipe (23) is covered with a heat insulation sleeve.

10. The reagent catalyst dropping device according to claim 9, characterized in that, The dripping pipe (23) is equipped with a dripping head (25) at its end.

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