Aniline recovery tower

Abstract

The aniline recovery tower comprises a tower top, a tower body connected with the tower top and a tower bottom assembled at the bottom of the tower body, a tower top gas phase outlet is formed in the top of the tower top, a tower top hanging column is arranged on one side of the tower top, a reflux inlet is formed in the side, close to the tower top hanging column, of the tower top, and a reflux outlet is formed in the side, close to the tower top hanging column, of the tower bottom. One end of the reflux inlet extends into the tower top and is connected with a reflux feeding pipe, one end of the reflux feeding pipe is connected into a tower top liquid distributor, the tower top liquid distributor is assembled in the tower top, and an upper sealing head is assembled at the top of the tower top; tower body lifting lugs are symmetrically arranged on the two sides of the tower body, and a feeding opening is formed in one side of the tower body; the device improves production efficiency, liberates labor force, and is reliable in structure, convenient to operate and wide in applicability.

Description

TECHNICAL FIELD

[0001] The utility model relates to aniline recovery device, concretely is an aniline recovery tower. BACKGROUND

[0002] Aniline is an important chemical raw material, is widely used in dye, plastic, drug and other fields. Aniline production process often accompanies with a large amount of waste gas and waste liquid discharge, causes environmental pollution and resource waste. Therefore, aniline recovery can effectively improve the resource utilization rate of production process, reduces the influence to the environment. Traditional aniline recovery device has the defects such as high energy consumption, complex operation.

[0003] Therefore, an aniline recovery tower is needed, which can reduce the operation process, improve production efficiency, reduce energy consumption and have good economy. SUMMARY

[0004] An aniline recovery tower can reduce the operation process, improve production efficiency, reduce energy consumption and have good economy, and has reliable structure, is convenient to operate and has wide applicability.

[0005] An aniline recovery tower comprises a tower top, a tower body connected with the tower top, and a tower bottom arranged at the bottom of the tower body, wherein:

[0006] The top of the tower top is provided with a tower top gas phase outlet, one side of the tower top is provided with a tower top lifting column, and the side of the tower top close to the tower top lifting column is provided with a reflux port, one end of the reflux port extends into the inside of the tower top and is connected with a reflux feed pipe, one end of the reflux feed pipe is connected with a tower top liquid distributor, the tower top liquid distributor is arranged in the inside of the tower top, and an upper head is arranged on the top of the tower top.

[0007] The tower body is provided with a tower body lifting lug on both sides, and the tower body is provided with a feed port on one side.

[0008] The bottom of the tower body is provided with a reboiler return port, a group of remote liquid level meters are arranged below the reboiler return port, a tower kettle pump circulation pipe interface is arranged at the bottom of the tower body, a lower head is arranged at the bottom of the tower body, a circulation liquid outlet is arranged on the lower head, a circulation liquid outlet pipe is connected to the circulation liquid outlet, and the other end of the circulation liquid outlet pipe extends out of one side of the tower bottom.

[0009] The bottom of the tower bottom is provided with a tower kettle outlet pipe, one end of the tower kettle outlet pipe is communicated with the lower head, the other end of the tower kettle outlet pipe extends out of the tower bottom, and tail lifting lugs are arranged on both sides of the bottom of the tower bottom.

[0010] Preferably, the tower body is provided with a first liquid collector, a second liquid collector, a third liquid collector, and a fourth liquid collector in sequence from top to bottom; the first liquid collector is provided with a first downcomer, the other end of which is connected to a first tower body liquid distributor; the second liquid collector is provided with a second downcomer, the other end of which is connected to a second tower body liquid distributor; the third liquid collector is provided with a third downcomer, the other end of which is connected to a third tower body liquid distributor; and the fourth liquid collector is provided with a fourth downcomer, the other end of which is connected to a fourth tower body liquid distributor.

[0011] Preferably, the upper end cap is provided with a gas outlet at a position perpendicular to the gas phase outlet at the top of the tower, and the upper end cap is provided with a heat insulation layer.

[0012] Preferably, the outer side of the tower body is provided with several ladders.

[0013] Preferably, a stainless steel structured packing layer is provided between the top liquid distributor, the first liquid collector, the second liquid collector, the third liquid collector, and the fourth liquid collector.

[0014] Preferably, the bottom of the tower is provided with anchor bolts.

[0015] Preferably, a support ring is provided at the connection points of the tower top, tower body, and tower bottom.

[0016] Preferably, manholes are provided on the top, body and bottom of the tower.

[0017] Preferably, remote temperature transmitter ports are provided on the top, body, and bottom of the tower.

[0018] The beneficial effects of this utility model are as follows: This utility model is an aniline recovery tower. By designing a structure with multiple liquid collectors and liquid distributors inside the tower, it can effectively extract aniline of different concentrations in layers, thereby improving economic benefits and resource utilization efficiency.

[0019] Energy saving: The design, equipped with a reboiler return port and a circulation pump, optimizes the heat recovery process of aniline, thereby reducing energy consumption and making it more environmentally friendly and economical.

[0020] Improve operational stability: The installation of remote level gauges and remote temperature sensors enables real-time monitoring of the liquid level and temperature within the tower, enhancing automation and improving operational stability and safety.

[0021] Enhanced structural safety: By installing support rings and anchor bolts on various parts of the tower, the overall structural stability of the equipment is improved, ensuring safety and reliability during long-term operation.

[0022] Small footprint: the optimized tower body structure and the setting of the ladder, facilitating operation and maintenance, while occupying less space, which is conducive to improving the utilization rate of the plant area. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is an external schematic view of the aniline recovery tower of the utility model;

[0024] Figure 2 It is a tower top partial schematic view of the aniline recovery tower of the utility model;

[0025] Figure 3 It is a tower body partial schematic view of the aniline recovery tower of the utility model;

[0026] Figure 4 It is a tower bottom partial schematic view of the aniline recovery tower of the utility model.

[0027] In the drawing: tower top 1, tower top gas phase outlet 2, tower top hanging column 3, reflux port 4, reflux feed pipe 5, tower top liquid distributor 6, upper head 7;

[0028] Tower body 8, tower body lug 9, feed port 10, remote liquid level meter port 11, reboiler return port 12, tower kettle pump circulation pipe interface 13, lower head 14, circulation liquid outlet 15, circulation liquid outlet pipe 16;

[0029] Tower bottom 17, tower kettle outlet pipe 18, tail lug 19, first liquid collector 20, second liquid collector 21, third liquid collector 22, first downcomer 23, first tower body liquid distributor 24, second downcomer 25, second tower body liquid distributor 26, third downcomer 27, third tower body liquid distributor 28, fourth liquid collector 29, fourth downcomer 30, fourth tower body liquid distributor 31, stainless steel structured packing layer 32. DETAILED DESCRIPTION

[0030] In order to make the technical scheme of the utility model easier to understand, the technical scheme of the utility model is described clearly and completely in the form of specific embodiments in combination with the drawings.

[0031] Embodiment 1:

[0032] As shown in the drawing, the tower body 8 of the utility model is provided with a first downcomer 23, a first tower body liquid distributor 24, a second downcomer 25, a second tower body liquid distributor 26, a third downcomer 27, a third tower body liquid distributor 28, a fourth downcomer 30 and a fourth tower body liquid distributor 31. Figures 1-4 The utility model relates to an aniline recovery tower, which comprises a tower top 1, a tower body 8 connected with the tower top 1 and a tower bottom 17 arranged at the bottom of the tower body 8. Figures 1-4

[0033] ​The top of the tower 1 is provided with a tower top gas phase outlet 2, one side of the tower 1 is provided with a tower top hanging column 3, one side of the tower 1 close to the tower top hanging column 3 is provided with a reflux port 4, one end of the reflux port 4 extends into the inside of the tower 1 and is connected with a reflux feed pipe 5, one end of the reflux feed pipe 5 is connected with a tower top liquid distributor 6, the tower top liquid distributor 6 is arranged in the inside of the tower 1, and the top of the tower 1 is arranged with an upper head 7;

[0034] The tower body 8 is symmetrically provided with a tower body lug 9 on both sides, and one side of the tower body 8 is provided with a feed port 10.

[0035] One side of the bottom of the tower body 8 is provided with a reboiler return port 12, a group of remote liquid level meter ports 11 are arranged below the reboiler return port 12, a tower kettle pump circulation pipe interface 13 is arranged at the bottom of the tower body 8, a lower head 14 is arranged at the bottom of the tower body 8, a circulation liquid outlet 15 is arranged on the lower head 14, a circulation liquid outlet pipe 16 is connected to the circulation liquid outlet 15, and the other end of the circulation liquid outlet pipe 16 penetrates out of one side of a tower bottom 17.

[0036] The tower bottom 17 is provided with a tower kettle outlet pipe 18 at the bottom, one end of the tower kettle outlet pipe 18 is in communication with the lower head 14, the other end of the tower kettle outlet pipe 18 penetrates out of the tower bottom 17, and tail lugs 19 are arranged on both sides of the bottom of the tower bottom 17.

[0037] The inside of the tower body 8 is sequentially provided with a first liquid collector 20, a second liquid collector 21, a third liquid collector 22 and a fourth liquid collector 29 from top to bottom; the first liquid collector 20 is provided with a first downcomer 23, one end of the first downcomer 23 is connected with a first tower body liquid distributor 24; the second liquid collector 21 is provided with a second downcomer 25, one end of the second downcomer 25 is connected with a second tower body liquid distributor 26; the third liquid collector 22 is provided with a third downcomer 27, one end of the third downcomer 27 is connected with a third tower body liquid distributor 28, and the fourth liquid collector 29 is provided with a fourth downcomer 30, one end of the fourth downcomer 30 is connected with a fourth tower body liquid distributor 31.

[0038] Example 2:

[0039] Different from example 1, example 2, as shown in Figures 1-4

[0040] The upper head 7 is provided with a gas outlet at a vertically corresponding position of the tower top gas phase outlet 2, and the upper head 7 is provided with a heat preservation layer.

[0041] The tower body 8 is provided with a plurality of ladders on the outside.

[0042] Stainless steel structured packing layers 32 are arranged between the tower top liquid distributor 6, the first liquid collector 20, the second liquid collector 21, the third liquid collector 22 and the fourth liquid collector 29.​

[0043] The bottom of the tower bottom 17 is provided with anchor bolts.

[0044] The connecting part of the tower top 1, the tower body 8 and the tower bottom 17 is provided with a support ring.

[0045] The manhole is arranged on the tower top 1, the tower body 8 and the tower bottom 17.

[0046] The tower top 1, the tower body 8 and the tower bottom 17 are provided with a remote temperature meter port.

[0047] The device is used:

[0048] Material input: the waste liquid containing aniline enters the tower top 1 through the recovery port 4 and is guided to the liquid collection area inside the tower.

[0049] Liquid distribution: after entering the tower top 1, the recovered liquid flows into the tower top liquid distributor 6 through the reflux feed pipe 5 and is uniformly distributed to the first liquid collector 20 inside the tower body 8.

[0050] Multistage separation: as the liquid flows downward, aniline is gradually collected by different liquid collectors 20, 21, 22, 29. In each liquid collector, the liquid is transported to the respective tower body liquid distributor 24, 26, 28, 31 through the corresponding downcomer 23, 25, 27, 30, realizing step-by-step purification.

[0051] Heat energy circulation: after the liquid is separated in each liquid collector, it returns to the reboiler return port 12, is heated again to evaporate the remaining aniline, and is refluxed to the tower top 1 again, forming a cycle of heat energy use. This process effectively improves the aniline recovery efficiency and reduces energy consumption.

[0052] Collection and discharge: after multiple separation and concentration, aniline is collected and discharged in the tower kettle outlet pipe 18 of the tower bottom 17, and aniline liquid with high purity can be used for subsequent industrial use.

[0053] Monitoring and operation: during the entire operation process, the remote liquid level meter port 11 and the remote temperature meter port enable the operator to monitor the liquid level and temperature in the tower in real time, optimize the operation parameters, and maintain the safety and stability of the equipment.

[0054] Through the above steps, the embodiment shows the high efficiency of the aniline recovery tower in practical application, not only improves the recovery rate of aniline, but also achieves good energy utilization rate, and reflects the important value of the equipment in the chemical industry.

[0055] It should be noted that the embodiments described herein are only part of the embodiments of the present application, not all the implementation manners of the present application, the embodiments are only exemplary, and the role is only to provide a more intuitive and clear way to understand the content of the present application, and is not a limitation on the technical solutions of the present application. Without departing from the concept of the present application, all other embodiments that can be thought of by those skilled in the art without creative labor, and other simple replacements and various changes of the technical solutions of the present application, all belong to the protection scope of the present application.

Claims

1. An aniline recovery column characterized by The tower comprises a tower top (1), a tower body (8) connected with the tower top (1), and a tower bottom (17) arranged at the bottom of the tower body (8), wherein: The tower top (1) is provided with a tower top gas phase outlet (2) at the top thereof, a tower top lifting column (3) is arranged on one side of the tower top (1), a reflux port (4) is arranged on the side of the tower top (1) close to the tower top lifting column (3), one end of the reflux port (4) extends into the tower top (1) and is connected with a reflux feed pipe (5), one end of the reflux feed pipe (5) is connected with a tower top liquid distributor (6), the tower top liquid distributor (6) is arranged in the tower top (1), and an upper head (7) is arranged at the top of the tower top (1). The tower body (8) is provided with a tower body lifting lug (9) on both sides thereof, and a feed port (10) is arranged on one side of the tower body (8). A reboiler return port (12) is arranged on one side of the bottom of the tower body (8), a group of remote liquid level meter ports (11) are arranged below the reboiler return port (12), a tower kettle pump circulation pipe interface (13) is arranged at a position of the bottom of the tower body (8), a lower head (14) is arranged at the bottom of the tower body (8), a circulation liquid outlet (15) is arranged on the lower head (14), a circulation liquid outlet pipe (16) is connected to the circulation liquid outlet (15), and the other end of the circulation liquid outlet pipe (16) extends out of one side of the tower bottom (17). The tower bottom (17) is provided with a tower kettle outlet pipe (18) at the bottom thereof, one end of the tower kettle outlet pipe (18) is in communication with the lower head (14), the other end of the tower kettle outlet pipe (18) extends out of the tower bottom (17), and tail lifting lugs (19) are arranged on both sides of the bottom of the tower bottom (17).

2. An aniline recovery column as claimed in claim 1, characterized in that The inside of the tower body (8) is sequentially provided with a first liquid collector (20), a second liquid collector (21), a third liquid collector (22), and a fourth liquid collector (29) from top to bottom; the first liquid collector (20) is provided with a first downcomer (23), and the other end of the first downcomer (23) is connected with a first tower body liquid distributor (24); the second liquid collector (21) is provided with a second downcomer (25), and the other end of the second downcomer (25) is connected with a second tower body liquid distributor (26); the third liquid collector (22) is provided with a third downcomer (27), and the other end of the third downcomer (27) is connected with a third tower body liquid distributor (28); and the fourth liquid collector (29) is provided with a fourth downcomer (30), and the other end of the fourth downcomer (30) is connected with a fourth tower body liquid distributor (31).

3. An aniline recovery column as claimed in claim 1, characterized in that The upper head (7) is provided with a gas outlet at a vertically corresponding position of the tower top gas phase outlet (2), and the upper head (7) is provided with a heat preservation layer.

4. An aniline recovery column as claimed in claim 1, characterized in that A plurality of climbing ladders are arranged on the outside of the tower body (8).

5. An aniline recovery column as claimed in claim 2, characterized in that Stainless steel structured packing layers (32) are arranged between the tower top liquid distributor (6), the first liquid collector (20), the second liquid collector (21), the third liquid collector (22), and the fourth liquid collector (29).

6. An aniline recovery column as claimed in claim 1, characterized in that The tower bottom (17) is provided with foundation bolts at the bottom thereof.

7. An aniline recovery column as claimed in claim 1, characterized in that Supporting rings are arranged at the connecting positions of the tower top (1), the tower body (8), and the tower bottom (17).

8. An aniline recovery column as claimed in claim 1, characterized in that Manholes are arranged on the tower top (1), the tower body (8), and the tower bottom (17).

9. An aniline recovery column as claimed in claim 1, characterized in that The top (1), the body (8) and the bottom (17) are provided with remote temperature sensor ports.

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