A kind of o-aminophenol hydrogenation vent absorption device

Abstract

This utility model relates to the field of chemical technology and discloses an o-aminophenol hydrogenation venting absorption device, including a reaction vessel, a hydrogenation vessel, and a storage vessel. A liquid addition pump is fixedly installed on the top of the storage vessel, and an inlet pipe is fixedly installed at the output end of the liquid addition pump. The end of the inlet pipe away from the liquid addition pump passes through the reaction vessel and extends into its interior. A liquid extraction pipe is fixedly installed at the input end of the liquid addition pump, and the end of the extraction pipe away from the liquid addition pump passes through the storage vessel and extends into its interior. A preheating mechanism and a uniform heating mechanism are provided inside the storage vessel. In this utility model, the heat generated during the hydrogenation reaction in the reaction vessel can be used to preheat the absorbent liquid inside the storage vessel, reducing its viscosity and enhancing the gas-liquid mass transfer effect. This improves the waste gas purification efficiency and allows for full utilization of the waste heat from the reaction process, reducing the energy consumption of steam or electric heating.

Description

Technical Field

[0001] This utility model relates to the field of chemical technology, and in particular to an o-aminophenol hydrogenation venting absorption device. Background Technology

[0002] The o-aminophenol hydrogenation venting absorption unit is a chemical equipment mainly used to treat hydrogen-containing waste gas generated during the o-aminophenol production process, ensuring safe discharge or recycling.

[0003] The hydrogenation of o-aminophenol is an important organic synthesis process. It usually uses nitrophenol as a raw material and carries out a reduction reaction in the presence of a catalyst and hydrogen to produce o-aminophenol. The hydrogenation of o-aminophenol is usually a strongly exothermic reaction, releasing 80 to 120 kJ of heat per mole of reaction. The temperature needs to be controlled by a cooling system during the reaction to avoid overheating.

[0004] However, most current hydrogenation venting absorption devices focus on waste gas treatment (such as ammonia absorption and hydrogen recovery), but fail to effectively utilize the waste heat released by the reaction. This results in a large amount of heat being directly lost through the cooling system or emitted with the high-temperature waste gas, which not only wastes energy but also increases the energy consumption of subsequent cooling. To address this issue, a hydrogenation venting absorption device for o-aminophenol is proposed. Summary of the Invention

[0005] To overcome the above deficiencies, this utility model provides an o-aminophenol hydrogenation venting absorption device, which aims to improve the problem mentioned in the prior art of "inability to rationally utilize the heat generated by the hydrogenation reaction".

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an o-aminophenol hydrogenation venting absorption device, comprising a reaction vessel, a hydrogenation vessel, and a storage vessel, wherein a liquid addition pump is fixedly installed on the top of the storage vessel, and an inlet pipe is fixedly installed at the output end of the liquid addition pump, the end of the inlet pipe away from the liquid addition pump passing through the reaction vessel and extending into the interior of the reaction vessel, and a liquid extraction pipe is fixedly installed at the input end of the liquid addition pump, the end of the liquid extraction pipe away from the liquid addition pump passing through the storage vessel and extending into the interior of the storage vessel, wherein a preheating mechanism and a uniform heating mechanism are provided inside the storage vessel;

[0007] The preheating mechanism includes a connecting pipe. One end of the connecting pipe is fixedly installed on the inner wall of the liquid storage vessel and a first spiral tube is fixedly installed thereon. The other end of the connecting pipe is fixedly installed on the inner wall of the reaction vessel and a second spiral tube is fixedly installed thereon. A circulation pump is fixedly installed on the top of the liquid storage vessel. A first pipe is fixedly installed at the output end of the circulation pump, and a second pipe is fixedly installed at the input end of the circulation pump.

[0008] As a further description of the above technical solution:

[0009] The uniform heating mechanism includes a rotating ring, which is rotatably connected to the outer wall of tube No. 1. An L-shaped stirring rod is fixedly installed on the outer wall of the rotating ring, and a metal block is fixedly installed on the inner wall of the rotating ring.

[0010] As a further description of the above technical solution:

[0011] The heat equalization mechanism also includes an impeller, a connecting rod is fixedly installed on the side wall of the impeller, and a magnet for attracting metal blocks is fixedly installed at the end of the connecting rod away from the impeller. The impeller and the first tube are in a concentric state.

[0012] As a further description of the above technical solution:

[0013] The magnet is connected to the inner walls of both the upper and lower ends of the metal block by rolling steel balls.

[0014] As a further description of the above technical solution:

[0015] The end of the No. 1 pipe away from the circulating pump passes through the liquid storage tank and extends into the interior of the liquid storage tank. The end of the first spiral tube away from the connecting pipe is fixedly installed with the No. 1 pipe.

[0016] As a further description of the above technical solution:

[0017] The end of the second tube away from the circulating pump passes through the reactor and extends into the interior of the reactor. The end of the second spiral tube away from the connecting pipe is fixedly installed with the second tube.

[0018] As a further description of the above technical solution:

[0019] The first tube is connected to the interior of the connecting tube through the first spiral tube, and the second tube is connected to the interior of the connecting tube through the second spiral tube.

[0020] As a further description of the above technical solution:

[0021] Both the magnet and the metal block are arc-shaped, and the magnet is slidably connected to the inner wall of tube number one.

[0022] This utility model has the following beneficial effects:

[0023] 1. In this utility model, by setting a preheating mechanism, the heat generated during the hydrogenation reaction in the reactor can be introduced into the interior of the storage tank, thereby preheating the absorbent liquid inside the storage tank. Preheating the absorbent liquid can reduce its viscosity, enhance the gas-liquid mass transfer effect, make the diffusion rate of ammonia in warm water faster, and react more fully with sulfuric acid, thereby improving the waste gas purification efficiency. Furthermore, the waste heat during the reaction process can be fully utilized, reducing the energy consumption of steam or electric heating.

[0024] 2. In this utility model, the rotation of the rotating ring, in conjunction with the L-shaped stirring rod, can stir the absorbent liquid inside the storage tank, so that the coolant inside the first vortex tube can have a uniform heat exchange with the absorbent liquid inside the storage tank, thereby enabling the absorbent liquid to be heated evenly and improving the preheating effect of the absorbent liquid. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0026] Figure 2 This is a schematic cross-sectional view of the reaction vessel and the storage vessel of this utility model;

[0027] Figure 3 This is a schematic diagram of the overall structure of the preheating mechanism of this utility model;

[0028] Figure 4 This is a partial cross-sectional structural diagram of the No. 1 tube of this utility model;

[0029] Figure 5 This is a partial structural diagram of the impeller and rotating ring of this utility model.

[0030] Legend:

[0031] 1. Reactor; 2. Hydrogenation vessel; 3. Storage vessel; 4. Liquid pump; 5. Liquid inlet pipe; 6. Liquid extraction pipe; 7. Preheating mechanism; 71. Connecting pipe; 72. First vortex tube; 73. Second vortex tube; 74. Circulation pump; 75. Pipe No. 1; 76. Pipe No. 2; 8. Uniform heating mechanism; 81. Rotating ring; 82. L-shaped stirring rod; 83. Metal block; 84. Impeller; 85. Connecting rod; 86. Magnet; 87. Steel ball. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] Reference Figure 1 - Figure 3This utility model provides an embodiment of an o-aminophenol hydrogenation venting absorption device, comprising a reaction vessel 1, a hydrogenation vessel 2, and a storage vessel 3. The storage vessel 3 stores an absorbent liquid. A liquid addition pump 4 is fixedly installed on the top of the storage vessel 3. An inlet pipe 5 is fixedly installed at the output end of the liquid addition pump 4. The end of the inlet pipe 5 away from the liquid addition pump 4 passes through the reaction vessel 1 and extends into the interior of the reaction vessel 1. The inlet pipe 5 is fixedly connected to the penetration point of the reaction vessel 1. A suction pipe 6 is fixedly installed at the input end of the liquid addition pump 4. The end of the suction pipe 6 away from the liquid addition pump 4 passes through the storage vessel 3 and extends into the interior of the storage vessel 3. The suction pipe 6 is fixedly connected to the penetration point of the storage vessel 3. By starting the liquid addition pump 4, the absorbent liquid inside the storage vessel 3 can be drawn into the suction pipe 6, so that the absorbent liquid inside the suction pipe 6 can be discharged into the inlet pipe 5 through the liquid addition pump 4, thereby adding the absorbent liquid inside the inlet pipe 5 into the interior of the reaction vessel 1. The storage vessel 3 is provided with a preheating mechanism 7 and a uniform heating mechanism 8.

[0034] Reference Figure 2 - Figure 3 The preheating mechanism 7 includes a connecting pipe 71. One end of the connecting pipe 71 is fixedly installed on the inner wall of the storage vessel 3 and a first spiral tube 72 is fixedly installed thereon. The first spiral tube 72 can preheat the absorbent liquid inside the storage vessel 3. The other end of the connecting pipe 71 is fixedly installed on the inner wall of the reaction vessel 1 and a second spiral tube 73 is fixedly installed thereon. Both the first spiral tube 72 and the second spiral tube 73 store coolant inside. The second spiral tube 73 can absorb the heat generated during the reaction process in the reaction vessel 1. A circulation pump 74 is fixedly installed on the top of the storage vessel 3. A first pipe 75 is fixedly installed at the output end of the circulation pump 74. The end of the first pipe 75 away from the circulation pump 74 passes through the storage vessel 3 and extends into the interior of the storage vessel 3. The first pipe 75 is fixedly connected to the penetration point of the storage vessel 3. The end of the first spiral tube 72 away from the connecting pipe 71 is fixedly installed with the first pipe 75. The coolant inside pipe 75 flows downward into the first spiral tube 72. Pipe 75 is connected to the inside of connecting pipe 71 through the first spiral tube 72. Pipe 76 is connected to the inside of connecting pipe 71 through the second spiral tube 73. The coolant inside the first spiral tube 72 can be discharged back into the second spiral tube 73 through the connecting pipe 71. Pipe 76 is fixedly installed at the input end of the circulation pump 74. The coolant inside pipe 76 can be injected into pipe 75 through the circulation pump 74. The end of pipe 76 away from the circulation pump 74 passes through the reactor 1 and extends into the reactor 1. Pipe 76 is fixedly connected to the penetration point of the reactor 1. The end of the second spiral tube 73 away from the connecting pipe 71 is fixedly installed with pipe 76. Starting the circulation pump 74 can draw the coolant inside the second spiral tube 73 into pipe 76.

[0035] Reference Figure 3The uniform heating mechanism 8 includes a rotating ring 81, which is rotatably connected to the outer wall of the first tube 75. An L-shaped stirring rod 82 is fixedly installed on the outer wall of the rotating ring 81. By rotating the rotating ring 81 in conjunction with the L-shaped stirring rod 82, the absorbent liquid inside the storage tank 3 can be stirred, so that the coolant inside the first spiral tube 72 can have a uniform heat exchange with the absorbent liquid inside the storage tank 3.

[0036] Reference Figure 4 - Figure 5 The heat equalization mechanism 8 also includes an impeller 84. A connecting rod 85 is fixedly installed on the side wall of the impeller 84. The impeller 84 and the first tube 75 are concentric. The coolant flowing inside the first tube 75 impacts the impeller 84, causing the impeller 84 to rotate inside the first tube 75. A metal block 83 is fixedly installed on the inner wall of the rotating ring 81. When the metal block 83 slides on the outer wall of the first tube 75, it will drive the rotating ring 81 to rotate on the outer wall of the first tube 75. A magnet 86 for attracting the metal block 83 is fixedly installed at the end of the connecting rod 85 away from the impeller 84. The magnet 86 is slidably connected to the inner wall of the first tube 75. When the magnet 86 slides, it will drive the metal block 83 magnetically attracted to it to slide on the outer wall of the first tube 75. The magnet 86 and the metal block 83 are both arc-shaped. Steel balls 87 are rolledly connected to the inner walls of the upper and lower ends of the magnet 86 and the metal block 83. The steel balls 87 can reduce the friction between the magnet 86, the metal block 83 and the first tube 75.

[0037] Working principle: When in use, the circulation pump 74 is started to draw the coolant inside the second volute 73 into the second pipe 76, so that the coolant inside the second pipe 76 is injected into the first pipe 75 through the circulation pump 74. At this time, the coolant inside the first pipe 75 will be discharged downward into the first volute 72. Meanwhile, the coolant inside the first volute 72 can be discharged back into the second volute 73 through the connecting pipe 71, so that the coolant can circulate inside the first volute 72 and the second volute 73.

[0038] When the reactor 1 is undergoing a hydrogenation reaction, the heat generated by the reaction is absorbed by the coolant inside the second vortex tube 73, causing the coolant inside the second vortex tube 73 to gradually heat up. As the coolant circulates, the coolant inside the first vortex tube 72 also heats up. When the temperature of the coolant inside the first vortex tube 72 rises, it preheats the absorbent inside the storage tank 3. Preheating the absorbent reduces its viscosity, enhances the gas-liquid mass transfer effect, allows ammonia to diffuse faster in warm water, reacts more fully with sulfuric acid, improves the efficiency of waste gas purification, and makes full use of the waste heat in the reaction process, reducing the energy consumption of steam or electric heating.

[0039] When the coolant inside the first tube 75 flows downward into the first vortex tube 72, the coolant impacts the impeller 84, causing the impeller 84 to push the connecting rod 85. At this time, the connecting rod 85 pushes the magnet 86, causing the magnet 86 to slide on the inner wall of the first tube 75. Simultaneously, the impeller 84 rotates inside the first tube 75. While the magnet 86 is sliding, it drives the metal block 83, which is magnetically attracted to it, to slide on the outer wall of the first tube 75. At this time, the metal block 83 drives the rotating ring 81 to rotate on the outer wall of the first tube 75. While the rotating ring 81 is rotating, it drives the two sets of L-shaped stirring rods 82 on its outer wall to make a circular motion around the first tube 75. At this time, the L-shaped stirring rods 82 can be used to stir the absorbent liquid inside the storage tank 3, so that the coolant inside the first vortex tube 72 can have a uniform heat exchange with the absorbent liquid inside the storage tank 3, so that the absorbent liquid can be heated evenly and the preheating effect of the absorbent liquid can be improved.

[0040] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A hydrogenation venting absorption device for o-aminophenol, comprising a reaction vessel (1), a hydrogenation vessel (2), and a storage vessel (3), characterized in that: A liquid addition pump (4) is fixedly installed on the top of the liquid storage tank (3). An inlet pipe (5) is fixedly installed at the output end of the liquid addition pump (4). The end of the inlet pipe (5) away from the liquid addition pump (4) passes through the reactor (1) and extends into the interior of the reactor (1). A liquid extraction pipe (6) is fixedly installed at the input end of the liquid addition pump (4). The end of the liquid extraction pipe (6) away from the liquid addition pump (4) passes through the liquid storage tank (3) and extends into the interior of the liquid storage tank (3). A preheating mechanism (7) and a uniform heating mechanism (8) are provided inside the liquid storage tank (3). The preheating mechanism (7) includes a connecting pipe (71), one end of which is fixedly installed on the inner wall of the liquid storage vessel (3) and a first spiral tube (72) is fixedly installed thereon. The other end of the connecting pipe (71) is fixedly installed on the inner wall of the reaction vessel (1) and a second spiral tube (73) is fixedly installed thereon. A circulating pump (74) is fixedly installed on the top of the liquid storage vessel (3). A first pipe (75) is fixedly installed at the output end of the circulating pump (74), and a second pipe (76) is fixedly installed at the input end of the circulating pump (74).

2. The o-aminophenol hydrogenation venting absorption device according to claim 1, characterized in that: The uniform heating mechanism (8) includes a rotating ring (81), which is rotatably connected to the outer wall of the first tube (75). An L-shaped stirring rod (82) is fixedly installed on the outer wall of the rotating ring (81), and a metal block (83) is fixedly installed on the inner wall of the rotating ring (81).

3. The o-aminophenol hydrogenation venting absorption device according to claim 2, characterized in that: The uniform heating mechanism (8) also includes an impeller (84), a connecting rod (85) is fixedly installed on the side wall of the impeller (84), and a magnet (86) for adsorbing metal blocks (83) is fixedly installed at the end of the connecting rod (85) away from the impeller (84). The impeller (84) and the first tube (75) are in a concentric state.

4. The o-aminophenol hydrogenation venting absorption device according to claim 3, characterized in that: The magnet (86) and the inner walls of the upper and lower ends of the metal block (83) are both connected by rolling steel balls (87).

5. The o-aminophenol hydrogenation venting absorption device according to claim 1, characterized in that: The end of the first tube (75) away from the circulating pump (74) passes through the liquid storage tank (3) and extends into the interior of the liquid storage tank (3). The end of the first spiral tube (72) away from the connecting tube (71) is fixedly installed with the first tube (75).

6. The o-aminophenol hydrogenation venting absorption device according to claim 1, characterized in that: The end of the second tube (76) away from the circulating pump (74) passes through the reactor (1) and extends into the interior of the reactor (1). The end of the second spiral tube (73) away from the connecting tube (71) is fixedly installed with the second tube (76).

7. The o-aminophenol hydrogenation venting absorption device according to claim 1, characterized in that: The first tube (75) is connected to the interior of the connecting tube (71) through the first spiral tube (72), and the second tube (76) is connected to the interior of the connecting tube (71) through the second spiral tube (73).

8. The o-aminophenol hydrogenation venting absorption device according to claim 4, characterized in that: The magnet (86) and the metal block (83) are both arc-shaped, and the magnet (86) is slidably connected to the inner wall of tube (75).

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