A bromine waste gas treatment device for bromination reaction

Abstract

This utility model discloses a device for treating bromine waste gas in bromination reactions, comprising a primary condenser, a secondary condenser, and a falling film absorption device connected in sequence. The falling film absorption device includes a horizontally arranged absorption tank with an inlet pipe on the left and an outlet pipe on the right. Several vertically placed packing layers are installed inside the absorption tank. Bromine waste gas entering through the inlet pipe passes through two packing layers and is discharged through the outlet pipe. This device can treat bromine waste gas. The bromine waste gas enters the absorption tank through the inlet pipe. Alkali pipes are installed at the upper ends of the two packing layers inside the absorption tank. Alkali flows down from above, forming a liquid film on the packing layers. The bromine waste gas reacts with the alkali liquid after passing through the packing layers, neutralizing and removing the bromine from the waste gas. The alkali liquid then flows downwards through the drain pipe, while the treated waste gas is discharged through the outlet pipe. This device effectively treats bromine waste gas through the combined action of alkali and has a reasonable structural design.

Description

Technical Field

[0001] This utility model relates to the field of manufacturing technology and equipment for carbamazepine raw materials, specifically a device for treating bromine waste gas in bromination reactions. Background Technology

[0002] In existing technologies, bromination is a chemical reaction that introduces bromine atoms into the carbamazepine molecule during the specific manufacturing process of carbamazepine raw material. It is an essential step in the production of carbamazepine raw material. However, bromination inevitably produces bromine waste gas, which contains bromine and its compounds. This waste gas is very harmful to the environment and human health, and therefore needs to be treated.

[0003] Existing bromine waste gas treatment devices usually require the installation of a condensation and cooling device first, because the temperature of bromine waste gas is very high and needs to be cooled down first. After that, falling film absorption is often used to treat the bromine in the bromine waste gas.

[0004] Falling film absorption equipment is typically used in conjunction with alkaline solutions. The working principle is as follows: bromine-containing waste gas first enters the falling film absorption tank, which is usually equipped with ceramic or plastic packing materials. Alkaline solution flows onto the packing layer, forming a liquid film that flows downwards. The waste gas passing through the packing layer comes into full contact with the liquid film within the absorber, where hydrogen bromide and bromine are neutralized and absorbed by the alkaline solution. The purified gas is discharged from the outlet pipe, while the alkaline solution that has absorbed hydrogen bromide and bromine flows out from the bottom, entering subsequent treatment or recovery processes.

[0005] In the aforementioned falling film absorption equipment, it is essential to ensure the uniformity of liquid distribution. The alkaline solution must be evenly distributed to all parts of the absorption tank at the top to form a liquid film of uniform thickness. This requires a well-designed liquid distributor and regular inspection and maintenance to prevent blockage or damage, thereby ensuring consistent absorption performance.

[0006] In existing technologies, alkaline solution pipes are usually only installed at the top, which prevents the alkaline solution from forming a uniform liquid film on the entire packing layer, severely affecting the treatment effect of bromine waste gas.

[0007] Therefore, in order to solve the above problems, it is necessary to develop a bromine waste gas treatment device with a reasonable structure and improved waste gas treatment effect for bromination reactions. Utility Model Content

[0008] The purpose of this invention is to address the shortcomings of existing technologies by providing a device for treating bromine waste gas during bromination reactions; the technical solution is as follows:

[0009] A device for treating bromine waste gas in a bromination reaction includes a primary condenser, a secondary condenser, and a falling film absorption device connected in sequence. The falling film absorption device includes a horizontally arranged absorption tank with an inlet pipe at the lower left end and an outlet pipe at the upper right end. The absorption tank contains several vertically placed packing layers, with flow gaps formed between adjacent packing layers. Bromine waste gas entering through the inlet pipe passes through the packing layers and flow gaps before being discharged through the outlet pipe.

[0010] Several semi-circular outer shells are installed at the upper end of the absorption tank, and the position of the outer shell corresponds to the position of the packing layer inside the absorption tank. An alkaline pipe is also provided above the outer shell, and the alkaline pipe is connected to the outer shell. The outer shell covers the upper half of the absorption tank at the corresponding position, and the upper half of the absorption tank is also provided with a liquid inlet.

[0011] The alkali solution in the alkali solution tube enters the outer shell, and then enters the packing layer through the liquid inlet hole in the outer shell.

[0012] Furthermore, the lower end of the absorption tank is also equipped with several drain pipes, the drain pipes being positioned corresponding to the flow gap.

[0013] Furthermore, a rotary motor is installed at the middle position of the left side wall of the absorption tank. The main shaft of the rotary motor extends laterally into the absorption tank and passes through all the packing layers. It is also installed on the right side wall of the absorption tank through bearing components.

[0014] Furthermore, a baffle plate is installed on the main shaft, and the baffle plate is set in the flow gap. When the rotary motor is turned on, the baffle plate rotates in the flow gap.

[0015] Furthermore, the turbulence plate is a flat plate structure that causes airflow disturbance, and there is a gap of at least 5 cm between the turbulence plate and the packing layers on both sides.

[0016] Furthermore, the width of the outer shell is greater than the thickness of the filler layer, so that the outer shell completely encloses the filler layer from the vertical position.

[0017] Furthermore, the inlet holes on the absorption tank are evenly distributed, and the position of the inlet holes will not exceed the width of the packing layer.

[0018] Furthermore, a reciprocating brush plate is also installed inside the outer shell, and a reciprocating motor is also installed on the absorption tank. The main shaft of the reciprocating motor extends into the outer shell and is connected to the reciprocating brush plate. The reciprocating motor drives the reciprocating brush plate to move left and right inside the outer shell.

[0019] Furthermore, the outer shell is configured as a detachable structure, with the filler layer thickness being consistent at both locations and the width of the two outer shells being consistent as well.

[0020] Beneficial effects: This utility model has the following beneficial effects:

[0021] 1) This device can treat bromine waste gas. Bromine waste gas enters the absorption tank through the inlet pipe. Alkali pipes are installed at the upper ends of the two packing layers in the absorption tank. The alkali flows down from above and forms a liquid film on the packing layer. The bromine waste gas reacts with the alkali liquid after passing through the packing layer, neutralizing and removing the bromine in the waste gas. The alkali liquid then flows down through the drain pipe and is discharged. The treated waste gas is discharged from the outlet pipe. The device effectively treats bromine waste gas through the combination of alkali liquid and has a reasonable structure and is easy to use.

[0022] 2) In this device, an outer shell corresponding to the position of the packing layer is installed on the absorption tank. The alkaline solution entering from the alkaline solution pipe will be completely filled in the outer shell and then enter the packing layer through the liquid inlet. The entire upper half of the packing layer will be filled with alkaline solution. Then the alkaline solution will flow down from the packing layer to form a liquid film. This ensures that the entire packing layer is evenly distributed with alkaline solution, forming a liquid film of uniform thickness without any dead corners. This can effectively ensure direct contact between the waste gas and the liquid film, increase the contact area between the waste gas and the liquid film, and effectively improve the treatment effect of the waste gas.

[0023] 3) In this device, multiple packing layers form flow gaps. After the exhaust gas flows through the flow gaps, it passes through the packing layers to achieve exhaust gas treatment. Although the liquid film on the packing layers is evenly distributed, it cannot be guaranteed that the incoming exhaust gas can pass through the packing layers evenly because the airflow direction is uncontrollable. In this device, a rotary motor is installed accordingly. A flow plate is set in the flow gap through the main shaft of the rotary motor. The flow plate can rotate with the rotary motor, thereby causing airflow disturbance. This allows the airflow to pass through the packing layers more evenly, rather than in a concentrated manner, which can improve the overall exhaust gas treatment effect.

[0024] 4) This device also includes a reciprocating brush plate inside the outer shell. The size of the reciprocating brush plate is the same as that of the outer shell, and a reciprocating motor is installed on the absorption tank. The reciprocating motor drives the reciprocating brush plate to move left and right inside the outer shell, which can effectively remove dirt and other substances inside the outer shell and ensure the smooth flow of alkaline solution. In addition, the outer shell is designed to be detachable, which facilitates maintenance and replacement. The structural design is also very reasonable. Attached Figure Description

[0025] Figure 1 This is a structural diagram of the present utility model;

[0026] Figure 2This is a structural diagram of the falling film absorption device in this utility model;

[0027] Figure 3 This is a diagram showing the installation position of the rotary motor in this utility model;

[0028] Figure 4 for Figure 2 Sectional view of AA;

[0029] Figure 5 for Figure 2 Installation location diagram of the reciprocating brush plate;

[0030] Figure 6 for Figure 4 Installation location diagram of the reciprocating brush plate;

[0031] The components include: a primary condenser 1; a secondary condenser 2; a falling film absorption device 3; an absorption tank 4; an inlet pipe 5; an outlet pipe 6; a packing layer 7; an outer shell 8; an alkali pipe 9; an inlet hole 10; a drain pipe 11; a rotary motor 12; a main shaft 13; a reciprocating brush plate 14; a flow gap 71; a bearing component 72; and a turbulence plate 73. Detailed Implementation

[0032] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments. These embodiments are implemented under the premise of the technical solution of the present invention. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

[0033] like Figure 1 and Figure 2 As shown, a bromine waste gas treatment device for bromination reaction includes a primary condenser 1, a secondary condenser 2, and a falling film absorption device 3 connected in sequence. The falling film absorption device 3 includes a horizontally arranged absorption tank 4. An inlet pipe 5 is provided at the lower left end of the absorption tank 4, and an outlet pipe 6 is provided at the upper right end. Several vertically placed packing layers 7 are installed inside the absorption tank 4, and a flow gap 71 is formed between adjacent packing layers 7. The bromine waste gas entering from the inlet pipe 5 passes through the packing layers 7 and the flow gap 71 and is discharged from the outlet pipe 6.

[0034] like Figure 4 As shown, several semi-circular outer shells 8 are installed at the upper end of the absorption tank 4, and the position of the outer shell 8 corresponds to the position of the packing layer 7 inside the absorption tank 4. An alkaline pipe 9 is also provided above the outer shell 8, and the alkaline pipe 9 is connected to the inside of the outer shell 8. The outer shell 8 encloses the upper half shell of the absorption tank 4 at the corresponding position, and an inlet hole 10 is also provided on the upper half shell of the absorption tank 4.

[0035] The alkali solution in the alkali solution tube 9 enters the outer shell 8, and then enters the packing layer 7 through the liquid inlet hole 10 in the outer shell 8.

[0036] Several drain pipes 11 are also installed at the lower end of the absorption tank 4, and the drain pipes 11 correspond to the positions of the flow gap 71.

[0037] like Figure 3 As shown, a rotary motor 12 is also installed at the middle position of the left side wall of the absorption tank 4. The main shaft 13 of the rotary motor 12 extends laterally into the absorption tank 4 and passes through all the packing layers 7. It is installed on the right side wall of the absorption tank 4 through the bearing component 72.

[0038] Furthermore, a baffle plate 73 is installed on the main shaft, and the baffle plate 73 is set in the flow gap 71. When the rotary motor 12 is turned on, the baffle plate 73 rotates in the flow gap 71.

[0039] The turbulence plate 73 has a flat plate structure, which causes airflow disturbance. There is a gap of at least 5 cm between the turbulence plate 73 and the packing layers 7 on both sides.

[0040] The width of the outer shell 8 is greater than the thickness of the filler layer 7, so that the outer shell 8 completely encloses the filler layer 7 from the vertical position.

[0041] The inlet holes 10 on the absorption tank 4 are evenly distributed, and the position of the inlet holes 10 will not exceed the width of the packing layer 7.

[0042] like Figure 5 and Figure 6 As shown, a reciprocating brush plate 14 is also installed inside the outer casing 8, and a reciprocating motor 15 is also installed on the absorption tank 4. The main shaft of the reciprocating motor 15 extends into the outer casing 8 and is connected to the reciprocating brush plate 14. The reciprocating motor 15 drives the reciprocating brush plate 14 to move left and right inside the outer casing 8.

[0043] The outer shell 8 is designed to be detachable, and the thickness of the filler layer 7 at the two locations is the same, as are the widths of the two outer shells 8.

[0044] The specific working process and principle of this device are as follows: Bromine waste gas enters the absorption tank through the inlet pipe. Alkali pipes are installed at the upper ends of multiple packing layers in the absorption tank. The alkali flows down from above and forms a liquid film on the packing layer. The bromine waste gas enters and reacts with the alkali liquid after passing through the packing layer, neutralizing and removing the bromine in the waste gas. Then the alkali liquid flows down through the drain pipe and is discharged. The treated waste gas is discharged from the outlet pipe.

[0045] In the above-mentioned waste gas treatment process, the device has an outer shell installed on the absorption tank, corresponding to the position of the packing layer. The outer shell has a semi-circular structure, which wraps around the upper half of the absorption tank and similarly wraps around the packing layer at the corresponding position inside. An inlet hole is provided in the upper half of the absorption pipe.

[0046] The alkali solution entering through the alkali solution pipe will completely fill the outer shell, and then enter the packing layer through the inlet hole. The entire upper half of the packing layer will be filled with alkali solution, which will then flow downward from the packing layer to form a liquid film. This ensures that the packing layer is evenly distributed with alkali solution, forming a liquid film of uniform thickness without any dead zones. This effectively ensures direct contact between the waste gas and the liquid film, increases the contact area between the waste gas and the liquid film, and effectively improves the waste gas treatment effect.

[0047] In addition, in this device, multiple packing layers form flow gaps. After the exhaust gas flows through the flow gaps, it passes through the packing layers to achieve exhaust gas treatment. Although the liquid film on the packing layers is evenly distributed, it cannot be guaranteed that the incoming exhaust gas can pass through the packing layers evenly because the airflow direction is uncontrollable. In contrast, this device is equipped with a rotary motor, and a flow plate is set in the flow gap through the main shaft of the rotary motor. The flow plate can rotate with the rotary motor, thereby causing airflow disturbance, so that the airflow can pass through the packing layers more evenly, rather than passing through the packing layers in a concentrated manner. Overall, this can improve the exhaust gas treatment effect, and the structural design is more reasonable.

[0048] In addition, a reciprocating brush plate is installed inside the outer shell of this device. The size of the reciprocating brush plate is the same as that of the outer shell, and a reciprocating motor is installed on the absorption tank. The reciprocating motor drives the reciprocating brush plate to move left and right inside the outer shell, which can effectively remove dirt and other substances inside the outer shell and ensure the smooth flow of alkaline solution. Furthermore, the outer shell is designed to be detachable, which facilitates maintenance and replacement. The structural design is also very reasonable.

[0049] The above-described specific embodiments are merely preferred embodiments of this utility model and are not intended to limit the implementation of this utility model or the scope of the claims. All equivalent changes and modifications made in accordance with the scope of protection of this utility model patent application should be included within the scope of this utility model patent application.

Claims

1. A bromine waste gas treatment device for bromination reaction, comprising a first-stage condensing device (1), a second-stage condensing device (2) and a falling-film absorption device (3) connected in sequence; characterized in that: The falling film absorption device (3) includes a horizontally arranged absorption tank (4). An air inlet pipe (5) is provided at the lower left end of the absorption tank (4), and an air outlet pipe (6) is provided at the upper right end. Several vertically placed packing layers (7) are installed inside the absorption tank (4), and a flow gap (71) is formed between adjacent packing layers (7). The bromine waste gas entering from the air inlet pipe (5) passes through the packing layers (7) and the flow gap (71) and is discharged from the air outlet pipe (6). The upper end of the absorption tank (4) is also equipped with several semi-circular outer shells (8), and the position of the outer shells (8) corresponds to the position of the packing layer (7) inside the absorption tank (4). An alkaline pipe (9) is also provided above the outer shell (8), and the alkaline pipe (9) is connected to the inner part of the outer shell (8). The outer shell (8) encloses the upper half of the absorption tank (4) at the corresponding position, and the upper half of the absorption tank (4) is also provided with a liquid inlet hole (10). The alkali solution in the alkali solution pipe (9) enters the outer shell (8), and then enters the packing layer (7) through the liquid inlet hole (10) in the outer shell (8).

2. A device for treating bromine waste gas in bromination reaction according to claim 1, characterized in that: The lower end of the absorption tank (4) is also equipped with several drain pipes (11), and the drain pipes (11) correspond to the positions of the flow gap (71).

3. The bromine waste gas treatment device for bromination reactions according to claim 1, characterized in that: A rotary motor (12) is also installed at the middle position of the left side wall of the absorption tank (4). The main shaft (13) of the rotary motor (12) extends laterally into the absorption tank (4) and passes through all the packing layers (7). It is installed on the right side wall of the absorption tank (4) through the bearing (72). Furthermore, a baffle plate (73) is installed on the main shaft, and the baffle plate (73) is set in the flow gap (71). When the rotary motor (12) is turned on, the baffle plate (73) rotates in the flow gap (71).

4. The apparatus for treating bromine waste gas in bromination reaction according to claim 3, characterized in that: The aforementioned turbulence plate (73) is a flat plate structure that causes airflow disturbance. There is a gap of at least 5 cm between the turbulence plate (73) and the packing layers (7) on both sides.

5. The apparatus for treating bromine waste gas in bromination reaction according to claim 1, characterized in that: The width of the outer shell (8) is greater than the thickness of the filler layer (7), so that the outer shell (8) completely encloses the filler layer (7) from the vertical position.

6. The apparatus for treating bromine waste gas in bromination reaction according to claim 1, characterized in that: The inlet holes (10) on the absorption tank (4) are evenly distributed, and the position of the inlet holes (10) will not exceed the width of the packing layer (7).

7. The bromine waste gas treatment device for bromination reactions according to claim 1, characterized in that: The outer shell (8) is also equipped with a reciprocating brush plate (14), and the absorption tank (4) is also equipped with a reciprocating motor (15). The main shaft of the reciprocating motor (15) extends into the outer shell (8) and is connected to the reciprocating brush plate (14). The reciprocating motor (15) drives the reciprocating brush plate (14) to move left and right in the outer shell (8).

8. A device for treating bromine waste gas in bromination reaction according to claim 1, characterized in that: The outer shell (8) is designed to be detachable, and the thickness of the filler layer (7) at the two locations is the same, as are the widths of the two outer shells (8).

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