A p-nitrophenol reduction crystallization evaporation tank

Abstract

This utility model discloses a p-nitrophenol reduction crystallization evaporator, specifically relating to the field of p-nitrophenol crystallization technology. It includes an evaporator body with an upper exhaust pipe fixedly connected to its top. The upper exhaust pipe has a dispersion exhaust assembly at its top. The dispersion exhaust assembly includes an exhaust valve fixed to the top of the upper exhaust pipe, and a dispersion pipe on one side of the upper exhaust pipe, which is fixedly connected to the evaporator body. The dispersion exhaust assembly also includes a dispersion valve, a side exhaust pipe, a connecting pipe, a diversion side pipe, and a side exhaust valve. The dispersion valve is threaded to the top of the dispersion pipe. This utility model, through the dispersion exhaust assembly, exhaust valve, and dispersion valve, can transport waste gas into the waste gas treatment pipeline. The side exhaust valve and diversion side pipe can quickly transport waste gas into the waste gas treatment pipeline, avoiding excessive pressure and potential safety hazards.

Description

Technical Field

[0001] This utility model relates to the field of p-nitrophenol crystallization technology, and more specifically, to a p-nitrophenol reduction crystallization evaporator. Background Technology

[0002] Evaporators for the reduction and crystallization of p-nitrophenol have specific applications in chemical production. Their main purpose is for the reduction reaction and crystallization process of p-nitrophenol. In this process, the evaporator provides a closed and controlled environment, allowing p-nitrophenol to undergo a reduction reaction at specific temperatures and pressures, thereby forming the desired crystalline product.

[0003] Among the existing publicly available literature, patent publication number CN117924089A discloses a method for synthesizing 2-nitro-p-chlorophenol using a continuous flow reactor. This technology has advantages such as inherent safety, small raw material consumption, stable reaction control, simple operation, and high safety. Furthermore, the equipment has good sealing, pressure resistance, and corrosion resistance, preventing material leakage and ensuring environmental and operator safety. However, this patent has the following drawbacks.

[0004] During the reduction, crystallization, and evaporation process of p-nitrophenol, a tank is required for crystallization heating treatment. However, the high-pressure exhaust gas expands significantly during crystallization and evaporation, making it difficult to efficiently remove the exhaust gas based on the amount of crystallization and evaporation inside the tank. Excessive pressure can easily cause safety hazards. Utility Model Content

[0005] To overcome the above-mentioned defects of the prior art, the present invention provides the following technical solution: a p-nitrophenol reduction crystallization evaporator, comprising an evaporator body, wherein an upper exhaust pipe is fixedly connected to the top of the evaporator body, and a dispersion exhaust assembly is provided at the top of the upper exhaust pipe; the dispersion exhaust assembly includes an exhaust valve fixed to the top of the upper exhaust pipe, and a dispersion pipe is provided on one side of the upper exhaust pipe, the dispersion pipe being fixedly connected to the evaporator body; the dispersion exhaust assembly further includes a dispersion valve, a side exhaust pipe, a connecting pipe, a diversion side pipe, and a side exhaust valve.

[0006] The dispersing valve is threaded to the top of the dispersing pipe, and the side drain pipe is fixedly connected to the outer wall of the evaporator. The connecting pipe is connected to one end of the side drain pipe, and the diversion side pipe is fixedly located at one end of the connecting pipe. The side drain valve is welded to the connecting pipe.

[0007] Preferably, the inner walls of the upper drain pipe and the dispersion pipe are both smooth surfaces, and both the upper drain pipe and the dispersion pipe are connected to the evaporator body. The inner walls of the side drain valve and the diversion side pipe are both smooth surfaces, and the vertical cross-section of the connecting pipe is annular. A resistance heater is fixedly installed at the bottom end of the evaporator body near its edge, and a lower drain valve is installed inside the resistance heater; the lower drain valve is fixedly connected to the evaporator body. A support frame is fixedly installed on the lower surface of the resistance heater, and multiple support blocks are fixedly connected to the bottom end of the support frame, and the multiple support blocks are arranged in a rectangular equidistant distribution.

[0008] In use, this technology involves connecting the top of the exhaust valve to the waste gas treatment pipeline, connecting the distribution valve to the waste gas treatment pipeline, and connecting the side exhaust valve and the diversion side pipe to the two waste gas treatment pipelines respectively. The upper exhaust pipe enables upward discharge. In this way, the exhaust valve and the distribution valve can transport the waste gas into the waste gas treatment pipeline, and the side exhaust pipe can transport the waste gas into the connecting pipe, further diverting the waste gas into the side exhaust valve. The side exhaust valve and the diversion side pipe can quickly transport the waste gas into the waste gas treatment pipeline.

[0009] Preferably, a hinge block is provided on the other side of the upper pipe, and the hinge block is fixedly connected to the evaporator body; a locking and positioning assembly is installed at the top of the hinge block; the locking and positioning assembly includes a mounting cover, a groove column, multiple buckles, multiple rotating shafts, and a locking rope; the mounting cover is hinged to the top of the hinge block, the groove column is fixedly connected to the upper surface of the mounting cover, multiple buckles are rotatably connected to the outer wall of the mounting cover, a rotating shaft is fixedly installed at the bottom of each buckle, the rotating shaft is rotatably connected to the evaporator body, the locking rope is installed on the inner wall of the buckle, the mounting cover is rotatably connected to the evaporator body, and the multiple buckles and multiple rotating shafts are arranged in a circular, equidistant distribution.

[0010] When using this technology, the rotating buckle drives the rotating shaft to rotate on the evaporator body. Multiple rotating buckles are used to lock the mounting cover in place. The locking rope is attached to the outer wall of the column and securely tightens and fixes the multiple rotating buckles.

[0011] The technical effects and advantages of this utility model are as follows:

[0012] 1. This utility model uses a dispersion exhaust assembly to inject p-nitrophenol raw material into the evaporator. The high-pressure steam generated inside the evaporator is transported to the upper exhaust pipe and then discharged to the dispersion valve through the dispersion pipe. The exhaust valve and dispersion valve can transport the waste gas to the waste gas treatment pipeline. The side exhaust valve and diversion side pipe can quickly transport the waste gas to the waste gas treatment pipeline. According to the amount of crystal evaporation inside the tank, the waste gas can be efficiently discharged, avoiding excessive pressure and safety hazards.

[0013] 2. In this utility model, the mounting cover rotates on the hinge block, and the rotating buckle drives the rotating shaft to rotate on the evaporator body. Multiple rotating buckles engage with the mounting cover, and the locking rope is attached to the outer wall of the groove column. The locking rope securely tightens and fixes the multiple rotating buckles. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the p-nitrophenol reduction crystallization evaporator of this utility model.

[0015] Figure 2 This is a partial structural diagram of the connection between the evaporator body and the upper pipe of this utility model.

[0016] Figure 3 This is a partial structural schematic diagram of the connection between the side drain pipe and the connecting pipe of this utility model.

[0017] Figure 4 This is a top view of the p-nitrophenol reduction crystallization evaporator of this utility model.

[0018] Figure 5 This is a partial structural diagram of the connection between the evaporator body and the hinge block of this utility model.

[0019] The attached diagram is labeled as follows: 1. Evaporator body; 2. Upper drain pipe; 3. Exhaust valve; 4. Dispersion pipe; 5. Dispersion valve; 6. Side drain pipe; 7. Connecting pipe; 8. Diversion side pipe; 9. Side drain valve; 10. Resistance heater; 11. Lower drain valve; 12. Support frame; 13. Support block; 14. Hinge block; 15. Mounting cover; 16. Groove column; 17. Rotary buckle; 18. Rotary shaft; 19. Locking rope. Detailed Implementation

[0020] 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.

[0021] As attached Figure 1 - Appendix Figure 5 The diagram shows a p-nitrophenol reduction crystallization evaporator, which is equipped with a dispersed exhaust component. The dispersed exhaust component can be configured to efficiently remove waste gas according to the amount of crystallization evaporation inside the tank, avoiding excessive pressure and potential safety hazards. The specific structure of the dispersed exhaust component is as follows.

[0022] In this technical solution, as shown in the appendix Figure 1 - Appendix Figure 1-3As shown, the top of the evaporator tank 1 is fixedly connected to the upper exhaust pipe 2, and the top of the upper exhaust pipe 2 is provided with a dispersion exhaust assembly; the dispersion exhaust assembly includes an exhaust valve 3 fixed to the top of the upper exhaust pipe 2, and a dispersion pipe 4 is provided on one side of the upper exhaust pipe 2, and the dispersion pipe 4 is fixedly connected to the evaporator tank 1; the dispersion exhaust assembly also includes a dispersion valve 5, a side exhaust pipe 6, a connecting pipe 7, a diversion side pipe 8, and a side exhaust valve 9.

[0023] The dispersing valve 5 is threaded to the top of the dispersing pipe 4, and the side drain pipe 6 is fixedly connected to the outer wall of the evaporator body 1. The connecting pipe 7 is connected to one end of the side drain pipe 6, and the diversion side pipe 8 is fixedly located at one end of the connecting pipe 7. The side drain valve 9 is welded to the connecting pipe 7. The inner walls of the upper drain pipe 2 and the dispersing pipe 4 are both smooth surfaces, and both the upper drain pipe 2 and the dispersing pipe 4 are connected to the evaporator body 1. The inner walls of the side drain valve 9 and the diversion side pipe 8 are both smooth surfaces, and the vertical cross-section of the connecting pipe 7 is annular.

[0024] In this technical solution, as shown in the appendix Figure 1 - Appendix Figure 4 As shown, a resistance heater 10 is fixedly installed at the bottom end of the evaporator tank 1, near its edge. A drain valve 11 is installed inside the resistance heater 10. The drain valve 11 is fixedly connected to the evaporator tank 1, allowing the support frame 12 to support the resistance heater 10. The resistance heater 10 heats the evaporator tank 1, and the drain valve 11 can be opened to drain the crystals inside the evaporator tank 1. A support frame 12 is fixedly installed on the lower surface of the resistance heater 10. Multiple support blocks 13 are fixedly connected to the bottom end of the support frame 12. The multiple support blocks 13 are arranged in a rectangular, equidistant distribution to provide support force to the support frame 12, increasing its stability.

[0025] In this technology, the nitrophenol reduction crystallization evaporator is used by multiple support blocks 13 to provide support for the support frame 12. The support frame 12 supports the resistance heater 10. After the mounting cover 15 is opened to the top opening of the evaporator body 1, the p-nitrophenol raw material is poured into the evaporator body 1. After the mounting cover 15 is closed, the bottom of the evaporator body 1 is heated by the resistance heater 10. This allows the p-nitrophenol to be rapidly heated, crystallized, and evaporated. The top of the exhaust valve 3 is connected to the waste gas treatment pipeline, and the dispersion valve 5 is also connected to the waste gas treatment pipeline. The side exhaust valve 9 and the diversion side pipe 8 are respectively connected to two waste gas treatment pipelines. In this way, the high-pressure steam generated inside the evaporator 1 is transported to the upper exhaust pipe 2, and is discharged upward through the upper exhaust pipe 2. It is also discharged upward through the dispersion pipe 4 to the dispersion valve 5. Thus, the exhaust valve 3 and the dispersion valve 5 can transport the waste gas into the waste gas treatment pipeline. The side exhaust pipe 6 transports the waste gas into the connecting pipe 7, and enters the diversion side pipe 8 through the connecting pipe 7. The waste gas is then further diverted to the side exhaust valve 9. In this way, the side exhaust valve 9 and the diversion side pipe 8 can quickly transport the waste gas into the waste gas treatment pipeline, so that p-nitrophenol can be reduced, evaporated and crystallized.

[0026] In this technical solution, as shown in the appendix Figure 5 As shown, a hinge block 14 is provided on the other side of the upper pipe 2, and the hinge block 14 is fixedly connected to the evaporator body 1; a locking and positioning assembly is installed at the top of the hinge block 14; the locking and positioning assembly includes a mounting cover 15, a groove column 16, multiple rotating buckles 17, multiple rotating shafts 18, and a locking rope 19.

[0027] The mounting cover 15 is hinged to the top of the hinge block 14. The groove post 16 is fixedly connected to the upper surface of the mounting cover 15. Multiple rotating buckles 17 are rotatably connected to the outer wall of the mounting cover 15. A rotating shaft 18 is fixedly installed at the bottom of each rotating buckle 17. The rotating shaft 18 is rotatably connected to the evaporator body 1. The locking rope 19 is installed on the inner wall of the rotating buckle 17. The mounting cover 15 is rotatably connected to the evaporator body 1. The multiple rotating buckles 17 and multiple rotating shafts 18 are arranged in a circular, equidistant distribution.

[0028] When using the nitrophenol reduction crystallization evaporator, after the mounting cover 15 is closed, the mounting cover 15 rotates on the hinge block 14, rotating the buckle 17. The buckle 17 drives the rotating shaft 18 to rotate on the evaporator body 1. The buckle 17 is engaged with the outer wall of the mounting cover 15. The mounting cover 15 is engaged by multiple buckles 17. Pulling the locking rope 19, the locking rope 19 is sleeved on the outer wall of the column 16. The locking rope 19 is wound and fixed on the outer wall of the column 16. The locking rope 19 firmly contracts and fixes the multiple buckles 17, thus improving the closing stability of the mounting cover 15.

[0029] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. 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 p-nitrophenol reduction crystallization evaporator tank comprising an evaporator tank body (1), characterized in that: The top of the evaporator (1) is fixedly connected to an upper exhaust pipe (2), and the top of the upper exhaust pipe (2) is provided with a dispersion exhaust assembly. The dispersed exhaust assembly includes an exhaust valve (3) fixed at the top of the upper exhaust pipe (2), and a dispersed pipe (4) is provided on one side of the upper exhaust pipe (2), and the dispersed pipe (4) is fixedly connected to the evaporator body (1). The dispersed exhaust assembly also includes a dispersed valve (5), a side exhaust pipe (6), a connecting pipe (7), a diversion side pipe (8), and a side exhaust valve (9). The dispersion valve (5) is threaded to the top of the dispersion pipe (4), and the side drain pipe (6) is fixedly connected to the outer wall of the evaporator (1). The connecting pipe (7) is connected to one end of the side drain pipe (6), and the diversion side pipe (8) is fixedly located at one end of the connecting pipe (7). The side drain valve (9) is welded to the connecting pipe (7).

2. A p-nitrophenol reduction crystallization evaporating tank according to claim 1, characterized in that: The inner walls of the upper pipe (2) and the dispersion pipe (4) are both smooth surfaces, and the upper pipe (2) and the dispersion pipe (4) are connected to the evaporator body (1).

3. The p-nitrophenol reduction crystallization evaporating tank according to claim 1, characterized in that: The inner walls of the side drain valve (9) and the diversion side pipe (8) are both smooth surfaces, and the vertical cross-section of the connecting pipe (7) is annular.

4. The p-nitrophenol reduction crystallization evaporating tank according to claim 1, characterized in that: A resistance heater (10) is fixedly installed at the bottom end of the evaporator (1) and near its edge line. A drain valve (11) is installed inside the resistance heater (10). The lower valve (11) is fixedly connected to the evaporator body (1).

5. A p-nitrophenol reduction crystallization evaporator tank according to claim 4, characterized in that: A support frame (12) is fixedly installed on the lower surface of the resistance heater (10), and a plurality of support blocks (13) are fixedly connected to the bottom end of the support frame (12). The plurality of support blocks (13) are arranged in a rectangular equidistant distribution.

6. The p-nitrophenol reduction crystallization evaporator tank of claim 1, wherein: A hinge block (14) is provided on the other side of the upper pipe (2), and the hinge block (14) is fixedly connected to the evaporator body (1); A locking and positioning assembly is installed at the top of the hinge block (14); The locking and positioning assembly includes a mounting cover (15), a groove post (16), multiple buckles (17), multiple pivots (18), and a locking rope (19). The mounting cover (15) is hinged to the top of the hinge block (14), the groove column (16) is fixedly connected to the upper surface of the mounting cover (15), and multiple rotating buckles (17) are rotatably connected to the outer wall of the mounting cover (15). Each rotating buckle (17) has a rotating shaft (18) fixedly installed at its bottom end. The rotating shaft (18) is rotatably connected to the evaporator body (1), and the locking rope (19) is installed on the inner wall of the rotating buckle (17).

7. A p-nitrophenol reduction crystallization evaporator according to claim 6, characterized in that: The mounting cover (15) is rotatably connected to the evaporator body (1), and the plurality of the rotating buckles (17) and the plurality of the rotating shafts (18) are arranged in a circular and equidistant arrangement.

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