Ammonium sulfate tail gas recovery device

Abstract

According to the ammonium sulfate tail gas recovery device provided by the invention, ammonium sulfate particles in ammonium sulfate tail gas can be blocked by the gas guide plate, and desalted water in the spraying device can absorb the ammonium sulfate particles in the ammonium sulfate tail gas, so that the purpose of recovering ammonium sulfate is achieved; by arranging the dissolving disc and the liquid stabilizing disc, ammonium sulfate particles can be fully dissolved in desalted water, and then are discharged out of the absorption tower through the liquid collector. The device can recover ammonium sulfate particles in the ammonium sulfate tail gas, prevent loss of a large amount of ammonium sulfate particles, save the use of ammonium sulfate, reduce the production cost and bring profits to enterprises; and meanwhile, tail gas emission is facilitated, and the environment is protected.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of recovery device relates to a kind of ammonium sulfate tail gas recovery device. BACKGROUND

[0002] Caprolactam production process will produce a large amount of ammonium sulfate tail gas, the tail gas is usually discharged by a diameter 1000cm chimney continuously, so the discharge site also becomes the focus of environmental protection monitoring site in caprolactam production system, causing great operating burden to enterprise.

[0003] In addition, many ammonium sulfate particles are produced in ammonium sulfate tail gas against force, and ammonium sulfate particles can be sold. But the direct discharge of ammonium sulfate tail gas with ammonium sulfate particles causes great economic loss to enterprises. In recent years, due to the increasingly fierce competition among enterprises, resource saving is the top priority of enterprises. INVENTION CONTENTS

[0004] The utility model aims at providing a kind of ammonium sulfate tail gas recovery device to solve the problem of ammonium sulfate particles in the process of ammonium sulfate tail gas discharge.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0006] The utility model provides a kind of ammonium sulfate tail gas recovery device, including absorption tower and desalted water tank, the inside of absorption tower is equipped with liquid separator, dissolving disc, liquid collector and at least two gas guide plates from top to bottom in sequence;The liquid separator is communicated with the desalted water tank, and the liquid collector is communicated with the outside of the absorption tower;The gas guide plate is located above the tail gas exhaust pipe, and the projection area of all the gas guide plates in the longitudinal direction of the absorption tower covers the cross section of the absorption tower, and the gas guide plate is equipped with air hole;Particle collection plate is further arranged between the tail gas exhaust pipe and the side wall of the absorption tower, and the particle collection plate is located below the gas guide plate.

[0007] Preferably, the included angle between the gas guide plate and the side wall of the absorption tower is 60°.

[0008] Preferably, the inside of the absorption tower is equipped with two gas guide plates, and the included angle between the two gas guide plates is 120°.

[0009] Preferably, the top of the liquid separator is further provided with a liquid trap.

[0010] Preferably, the included angle between the particle collection plate and the side wall of the absorption tower is 60°.

[0011] Preferably, a liquid stabilizing disc is further arranged between the dissolving disc and the liquid collector, and the liquid stabilizing disc is provided with an inner hole.

[0012] Preferably, the inner hole has a diameter of 8mm.

[0013] Preferably, the dissolving disc has a height of 200mm.

[0014] Preferably, the device further comprises a slurry buffer tank, which is connected to the liquid collector.

[0015] The utility model has the following beneficial effects:

[0016] (1) The setting of the air guide plate can block the ammonium sulfate particles in the ammonium sulfate tail gas, achieving the purpose of recycling ammonium sulfate.

[0017] (2) The desalted water set by the spray can absorb the ammonium sulfate particles in the ammonium sulfate tail gas, further recycling ammonium sulfate.

[0018] (3) The setting of the dissolving disc and the liquid stabilizing disc can make the desalted water fully dissolve the ammonium sulfate particles, and then discharge to the outside of the absorption tower through the liquid collector.

[0019] (4) The device can recycle the ammonium sulfate particles in the ammonium sulfate tail gas, prevent the loss of a large amount of ammonium sulfate particles, save the use of ammonium sulfate, reduce the production cost, and bring profits to the enterprise; at the same time, it is also convenient for the emission of tail gas, and protects the environment. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 The structure diagram of the ammonium sulfate tail gas recycling device provided by the embodiment of the application is shown in the figure;

[0021] Symbols represent:

[0022] 1-absorption tower, 2-desalted water tank, 3-liquid separator, 4-dissolving disc, 5-liquid collector, 6-air guide plate, 7-tail gas emptying pipe, 8-vent hole, 9-particle collection plate, 10-liquid trap, 11-liquid stabilizing disc, 12-inner hole, 13-slurry buffer tank, 14-emptying pipeline. DETAILED DESCRIPTION

[0023] The technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0024] The embodiment of the present application provides a kind of ammonium sulfate tail gas recovery device, the device includes absorption tower 1 and be located in the desalted water tank 2 outside absorption tower 1, wherein, absorption tower 1 inside is sequentially provided with distributor 3, dissolving disc 4, liquid collector 5 and at least two air guide plates 6 from top to bottom, as shown in the attached Figure 1 As shown in the attached

[0025] Specifically, air guide plate 6 is located above tail gas exhaust pipe 7, and the projection area of all air guide plates 6 along the longitudinal direction of absorption tower 1 covers the cross section of absorption tower 1, for blocking ammonium sulfate particles from continuing to rise with tail gas. In order to facilitate the discharge of tail gas, air guide plate 6 is provided with air hole 8. Further, in order to make the stable discharge of ammonium sulfate tail gas, the included angle between air guide plate 6 and the side wall of absorption tower 1 is 60°. More preferably, in order to reduce the cost, two air guide plates 6 are provided in the inside of absorption tower 1 in the embodiment of the present application, and the included angle between the two air guide plates 6 is 120°.

[0026] In order to receive the ammonium sulfate particles blocked by air guide plate 6, air guide plate 6 is further provided with particle collection plate 9 below, and the particle collection plate 9 is located between tail gas exhaust pipe 7 and the side wall of absorption tower 1. In the embodiment of the present application, in order to facilitate the discharge of ammonium sulfate particles, the included angle between particle collection plate 9 and the side wall of absorption tower 1 is 60°. Further, in order to prevent the accumulation of ammonium sulfate particles, the ammonium sulfate particles can be discharged to the outside of absorption tower 1 by nitrogen blowing.

[0027] The tail gas of blocked ammonium sulfate particles continues to rise in absorption tower 1, and when rising to distributor 3, the desalted water in desalted water tank 2 is transported to distributor 3, the remaining ammonium sulfate particles rising with the tail gas are impacted down by spraying, and fall into dissolving disc 4. In order to maximize the recovery of ammonium sulfate particles, the desalted water in desalted water tank 2 is heated to 60℃ before being sprayed to distributor 3, so as to ensure that the desalted water at a higher temperature can dissolve ammonium sulfate particles to form a mixed liquid. In order to ensure that the desalted water can fully dissolve the ammonium sulfate particles, the height of dissolving disc 4 is set to 200mm.

[0028] When the mixed liquid in dissolving disc 4 is too much, it will overflow into liquid collector 5, and then be discharged to the outside of absorption tower 1 through liquid collector 5. In order to reduce the working load of liquid collector 5 and increase the contact time of ammonium sulfate particles and desalted water, a liquid stabilizing disc 11 is further provided between dissolving disc 4 and liquid collector 5 in the embodiment of the present application, and the liquid stabilizing disc 11 is provided with an inner hole 12, and the aperture of the inner hole 12 is 8mm.

[0029] In order to facilitate the collection of the mixed liquid discharged to the outside of absorption tower 1, the device provided by the embodiment of the present application further includes slurry buffer tank 13, and the slurry buffer tank 13 is communicated with liquid collector 5. The mixed liquid in slurry buffer tank 13 is transported to other systems for further treatment by a delivery pump.

[0030] The tail gas after absorbing desalted water continues to rise. In order to prevent that liquid material is still entrained in the continuously rising tail gas, the top of the liquid separator 3 is also provided with a liquid catcher 10 to catch the desalted water.

[0031] In order to reduce the flow rate of the tail gas in the tail gas exhaust pipe 7, the diameter of the absorption tower 1 in the embodiment of the application is 4200mm, and the flow rate of the tail gas is controlled at 1m / s to ensure that the ammonium sulfate particles are fully absorbed. Further, in order to prevent overpressure in the absorption tower 1, the absorption tower 1 is also connected with a venting pipe 14 to facilitate controlling the pressure in the absorption tower 1 through the venting pipe 14, and to ensure the operation stability of the ammonium sulfate particle recovery.

[0032] The use process of the ammonium sulfate tail gas recovery device provided by the embodiment of the application is as follows: the desalted water in the desalted water tank 2 is heated to 60℃ through a heat exchanger, and then sprayed into the dissolving disc 4 through the liquid separator 3. When the liquid level in the dissolving disc 4 meets the requirements, the ammonium sulfate tail gas is discharged into the absorption tower 1 through the tail gas exhaust pipe 7; at the same time, the spraying amount of the liquid separator 3 is controlled to ensure the recovery effect. In the rising process of the ammonium sulfate tail gas, the ammonium sulfate particles contained therein are blocked by the gas guide plate 6 to the particle collection plate 9. The continuously rising ammonium sulfate tail gas is washed down to the dissolving disc 4 by the desalted water, and continues to absorb the ammonium sulfate particles in the ammonium sulfate tail gas to form a mixed liquid. The mixed liquid is discharged into the liquid collector 5, and finally discharged into the slurry buffer tank 13. The ammonium sulfate tail gas continues to rise to the liquid catcher 10 to catch the desalted water. The ammonium sulfate content in the tail gas is detected at the liquid catcher 10, and if it meets the discharge requirements, it is discharged; if it does not meet the discharge requirements, it continues to enter the tail gas exhaust pipe 7 to absorb ammonium sulfate.

[0033] The above only describes the preferred embodiments of the application and is not used to limit the application. For those skilled in the art, the application can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the application shall be included in the protection scope of the application.

Claims

1. An ammonium sulfate tail gas recovery device, characterized in that, The absorption tower (1) includes a demineralized water tank (2). Inside the absorption tower (1), from top to bottom, there are a liquid separator (3), a dissolving plate (4), a liquid collector (5), and at least two air guide plates (6). The liquid separator (3) is connected to the demineralized water tank (2), and the liquid collector (5) is connected to the outside of the absorption tower (1). The air guide plates (6) are located above the exhaust pipe (7), and the projected area of ​​all the air guide plates (6) along the longitudinal direction of the absorption tower (1) covers the cross-section of the absorption tower (1). The air guide plates (6) are provided with ventilation holes (8). A particle collection plate (9) is also provided between the exhaust pipe (7) and the side wall of the absorption tower (1), and the particle collection plate (9) is located below the air guide plates (6).

2. The ammonium sulfate tail gas recovery device according to claim 1, characterized in that, The angle between the air guide plate (6) and the side wall of the absorption tower (1) is 60°.

3. The ammonium sulfate tail gas recovery device according to claim 1, characterized in that, The absorption tower (1) is equipped with two air guide plates (6) inside, and the included angle between the two air guide plates (6) is 120°.

4. The ammonium sulfate tail gas recovery device according to claim 1, characterized in that, The top of the liquid separator (3) is also provided with a liquid trap (10).

5. The ammonium sulfate tail gas recovery device according to claim 1, characterized in that, The angle between the particle collection plate (9) and the side wall of the absorption tower (1) is 60°.

6. The ammonium sulfate tail gas recovery device according to claim 1, characterized in that, A liquid stabilizing plate (11) is also provided between the dissolving plate (4) and the liquid collector (5), and the liquid stabilizing plate (11) is provided with an inner hole (12).

7. The ammonium sulfate tail gas recovery device according to claim 6, characterized in that, The diameter of the inner hole (12) is 8 mm.

8. The ammonium sulfate tail gas recovery device according to claim 1, characterized in that, The height of the melting plate (4) is 200 mm.

9. The ammonium sulfate tail gas recovery device according to claim 1, characterized in that, The device also includes a slurry buffer tank (13), which is connected to the liquid collector (5).

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