An exhaust gas recovery device for octabromobisphenyl ether flame retardants

Abstract

The utility model discloses a kind of tail gas recovery devices of octabromodiphenyl ether flame retardant, including cylinder, the top of the cylinder is rotatably connected with driving rod, the top of driving rod is equipped with motor, driving rod outside top is fixedly equipped with large grooved wheel, driving rod outside is fixedly connected with turnover material screw rod and several stirring leaves, multiple round holes are set up on the stirring leaf, the cylinder top is fixedly inserted with exhaust pipe and second reflux pipe, first reflux pipe is fixedly connected between the exhaust pipe and second reflux pipe, a kind of tail gas recovery device of octabromodiphenyl ether flame retardant of the utility model, the setting of large grooved wheel, small grooved wheel and belt, so that motor can be transmitted to driving rod, it can also be transmitted to blade, so as to facilitate gas backflow to continue processing, reduce the use of electrical equipment, reduce production energy consumption.

Description

Technical Field

[0001] This utility model relates to the technical field, specifically to a tail gas recovery device for octabromoether flame retardants. Background Technology

[0002] Flame retardants are functional additives that impart flame-retardant properties to flammable polymers, primarily designed for the flame retardancy of polymer materials. There are various types of flame retardants, categorized by application method into additive flame retardants and reactive flame retardants. Currently, additive flame retardants mainly include organic and inorganic flame retardants, halogenated flame retardants (organochlorides and organic bromides), and non-halogenated flame retardants; for example, octabromoether flame retardants belong to the halogenated category. The processing of halogenated flame retardants generates chlorine gas. If this chlorine gas is not treated promptly and is directly released into the atmosphere, it will pollute the air and harm human health.

[0003] Chinese Patent Publication No. CN212548956U discloses a tail gas absorption device for flame retardant production, comprising: a housing; a rotating rod rotatably mounted on the inner top wall of the housing, the top end of the rotating rod extending above the housing; multiple stirring rods fixedly mounted on the rotating rod; and a motor fixedly mounted above the housing, the motor's output shaft fixedly connected to the top end of the rotating rod. This tail gas absorption device for flame retardant production can treat the tail gas generated during flame retardant production, thereby preventing chlorine gas from being released into the atmosphere and causing harm to human health and the environment. The multiple stirring rods allow for a faster and more complete reaction between the tail gas and calcium hydroxide. The shovel plate allows for timely removal of deposits on the inner wall of the housing, thus maintaining the cleanliness of the inner wall.

[0004] However, in actual use, the above-mentioned device requires multiple electrical components, which greatly increases energy consumption and significantly increases production costs. Utility Model Content

[0005] The technical problem solved by this utility model is to overcome the defects of the prior art and provide a tail gas recovery device for octabromoether flame retardants.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A tail gas recovery device for an octabromoether flame retardant includes a cylindrical body. A drive rod is rotatably connected to the top of the cylindrical body. A motor is installed at the top of the drive rod. A large grooved wheel is fixedly fitted on the outer top of the drive rod. A turning screw and several stirring blades are fixedly connected to the outer side of the drive rod. The stirring blades have multiple circular holes. An exhaust pipe and a second return pipe are fixedly inserted into the top of the cylindrical body. A first return pipe is fixedly connected between the exhaust pipe and the second return pipe. A fixed cover is fixedly connected to the top of the second return pipe. A driven rod is rotatably connected to the top of the fixed cover. Several blades are fixedly connected to the bottom of the driven rod. A small grooved wheel is fixedly fitted on the outer top of the driven rod.

[0008] Preferably, four support legs are fixedly connected to the bottom of the cylinder, a discharge valve is fixedly inserted into the bottom of the cylinder, a feed valve is fixedly inserted into the right side wall of the cylinder near the top, and an exhaust gas inlet pipe and a carbon dioxide inlet pipe are fixedly inserted into the top of the cylinder near the rear side.

[0009] Preferably, a mounting plate is provided on the rear side of the motor, the motor is mounted on the mounting plate by screws, the mounting plate is fixedly connected to the top of the cylinder, and the power output end of the motor is fixedly connected to the drive rod.

[0010] Preferably, the material turning screw is located near the bottom end of the drive rod, the stirring blade is inclined, the inner cavity of the cylinder is provided with a scraper, and two connecting rods are fixedly connected to the right side of the scraper, and the connecting rods are fixedly connected to the drive rod.

[0011] Preferably, the first return pipe is connected to the exhaust pipe and the second return pipe respectively, the first return pipe is provided with a matching shut-off valve, and the exhaust pipe is provided with a matching exhaust valve.

[0012] Preferably, a belt is provided between the large grooved wheel and the small grooved wheel, and the large grooved wheel and the small grooved wheel are connected by belt drive.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This utility model relates to a tail gas recovery device for octabromoether flame retardants. The device, through the arrangement of a large grooved wheel, a small grooved wheel and a belt, allows the motor to transmit power to both the drive rod and the blades, thereby facilitating gas recirculation for further processing, reducing the use of electrical equipment, and lowering production energy consumption.

[0015] 2. The present invention relates to a tail gas recovery device for an octabromoether flame retardant. When the stirring blade rotates, it generates a large number of bubbles through the circular hole. The bubbles can increase the amount of carbon dioxide incorporated, allowing the calcium hydroxide solution to be filled with a large amount of carbon dioxide, thereby making the calcium hypochlorite reaction more complete.

[0016] 3. This utility model provides a tail gas recovery device for octabromoether flame retardants. The rotating stirring blades can stir the solution inside the cylinder, and the turning screw turns the solution at the bottom of the cylinder upward, improving the stirring effect and enabling the tail gas of the flame retardant to be fully mixed with the sodium hydroxide solution. Attached Figure Description

[0017] Figure 1 This is a frontal perspective view of the present invention;

[0018] Figure 2 This is a top perspective view of the present invention;

[0019] Figure 3 This is a front sectional perspective view of the cylindrical body of the component of this utility model;

[0020] Figure 4 This is a front perspective view of the discharge valve component of this utility model;

[0021] Figure 5 This is a front perspective view of the material-turning screw component of this utility model;

[0022] Figure 6 This is a front perspective view of the component fixing cover of this utility model;

[0023] Figure 7 This is a frontal sectional perspective view of the component fixing cover of this utility model.

[0024] Labels in the diagram: 1. Cylinder; 2. Support leg; 3. Discharge valve; 4. Feed valve; 5. Exhaust gas inlet pipe; 6. Carbon dioxide inlet pipe; 7. Drive rod; 8. Motor; 9. Mounting plate; 10. Agitator blade; 11. Tilting screw; 12. Scraper; 13. Connecting rod; 14. Round hole; 15. Large grooved wheel; 16. Exhaust pipe; 17. Exhaust valve; 18. First return pipe; 19. Shut-off valve; 20. Second return pipe; 21. Fixed cover; 22. Driven rod; 23. Small grooved wheel; 24. Blade; 25. Belt. Detailed Implementation

[0025] 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.

[0026] Example 1

[0027] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 An octabromoether flame retardant tail gas recovery device includes a cylinder 1. Four support legs 2 are fixedly connected to the bottom of the cylinder 1. A discharge valve 3 is fixedly inserted into the bottom of the cylinder 1. A feed valve 4 is fixedly inserted into the right side wall of the cylinder 1 near the top. A tail gas inlet pipe 5 and a carbon dioxide inlet pipe 6 are fixedly inserted into the top of the cylinder 1 near the rear side. A drive rod 7 is rotatably connected to the top of the cylinder 1. A motor 8 is provided at the top of the drive rod 7. A mounting plate 9 is provided at the rear side of the motor 8. The motor 8 is mounted on the mounting plate 9 by screws. The mounting plate 9 is fixedly connected to the top of the cylinder 1. The power output end of the motor 8 is fixedly connected to the drive rod 7. A large grooved wheel 15 is fixedly sleeved on the outer top of the drive rod 7. A turning screw 11 and several stirring blades 10 are fixedly connected to the outer side of the drive rod 7. The turning screw 11 is near the bottom end of the drive rod 7. A scraper 12 is provided in the inner cavity of the cylinder 1. Two connecting rods 13 are fixedly connected to the right side of the scraper 12. The connecting rods 13 are fixedly connected to the drive rod 7.

[0028] An exhaust pipe 16 and a second return pipe 20 are fixedly inserted into the top of the cylinder 1. A chlorine detector (not shown in the figure, this technology is common knowledge) is installed on the exhaust pipe 16. A first return pipe 18 is fixedly connected between the exhaust pipe 16 and the second return pipe 20. The first return pipe 18 is interconnected with the exhaust pipe 16 and the second return pipe 20. A stop valve 19 is installed on the first return pipe 18 and an exhaust valve 17 is installed on the exhaust pipe 16. A fixed cover 21 is fixedly connected to the top of the second return pipe 20. A driven rod 22 is rotatably connected to the top of the fixed cover 21. Several blades 24 are fixedly connected to the bottom of the driven rod 22. A small grooved wheel 23 is fixedly sleeved on the outer top of the driven rod 22. A belt 25 is provided between the large grooved wheel 15 and the small grooved wheel 23. The large grooved wheel 15 and the small grooved wheel 23 are connected by the belt 25.

[0029] During use, the above embodiments

[0030] Example 2

[0031] Please see Figure 5 The stirring blade 10 is inclined and has multiple round holes 14.

[0032] In the above embodiment, when the stirring blade 10 rotates, it generates a large number of bubbles through the round hole 14. The bubbles can increase the amount of carbon dioxide incorporated, allowing the calcium hydroxide solution to be filled with a large amount of carbon dioxide, thereby making the calcium hypochlorite reaction more complete.

[0033] Working principle: This utility model relates to a tail gas recovery device for octabromoether flame retardants.

[0034] First, open the feed valve 4 to inject an appropriate amount of calcium hydroxide solution into the cylinder 1. The liquid level should be higher than the bottom of the exhaust gas inlet pipe 5 and the carbon dioxide inlet pipe 6, but lower than the bottom of the exhaust pipe 16. Then, the exhaust gas from the flame retardant processing is transported into the cylinder 1 through the exhaust gas inlet pipe 5. Next, start the motor 8. After starting, the motor 8 drives the drive rod 7 to rotate. The rotation of the drive rod 7 drives the stirring blade 10 and the tilting screw 11 to rotate. The rotation of the stirring blade 10 can stir the solution in the cylinder 1, and the tilting screw 11 can turn the solution at the bottom of the inner cavity of the cylinder 1 upwards, improving the stirring effect and allowing the exhaust gas of the flame retardant to be fully mixed with the sodium hydroxide solution. The mixture is used to produce calcium hypochlorite and calcium chloride. After the tail gas is treated, an appropriate amount of carbon dioxide is introduced into the cylinder 1 through the carbon dioxide inlet pipe 6, so that the carbon dioxide reacts with the calcium hypochlorite to produce calcium carbonate and hypochlorous acid. At this time, when the stirring blade 10 rotates, it generates a large number of bubbles through the round hole 14. The bubbles can increase the amount of carbon dioxide incorporated, so that the calcium hydroxide solution can be filled with a large amount of carbon dioxide, thereby making the reaction of calcium hypochlorite more complete. The treated gas enters the exhaust pipe 16. If the gas no longer contains chlorine, the exhaust valve 17 is opened to discharge the gas.

[0035] If the chlorine content in the gas is still high, do not open the exhaust valve 17 to exhaust the gas. Instead, open the shut-off valve 19. The gas enters the first return pipe 18, the second return pipe 20, and the inner cavity of the fixed cover 21 from the exhaust pipe 16. When the drive rod 7 is working, it drives the driven rod 22 and the blade 24 to rotate through the large grooved wheel 15, the belt 25, and the small grooved wheel 23. The blade 24 generates a downward airflow. The airflow blows the gas in the second return pipe 20 and the inner cavity of the fixed cover 21 downward into the calcium hydroxide solution, causing the chlorine to react again.

[0036] After the reaction is complete, all the gas is discharged, and finally the discharge valve 3 is opened to release the liquid and sediment in the cylinder 1. After the liquid is completely discharged, the motor 8 drives the scraper 12 to remove the calcium carbonate sediment on the inner wall of the cylinder 1, thereby cleaning the inner wall of the cylinder 1.

[0037] Compared with existing technologies, this device, through the arrangement of the large grooved pulley 15, the small grooved pulley 23 and the belt 25, allows the motor 8 to transmit power to both the drive rod 7 and the blades 24, thereby facilitating gas recirculation for further processing, reducing the use of electrical equipment, and lowering production energy consumption.

[0038] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0039] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0040] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0041] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0042] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0043] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An apparatus for recovering tail gas of octabromobisphenyl ether flame retardant, comprising a cylinder (1), characterized in that: A drive rod (7) is rotatably connected to the top of the cylinder (1). A motor (8) is provided at the top of the drive rod (7). A large grooved wheel (15) is fixedly sleeved on the outer top of the drive rod (7). A turning screw (11) and several stirring blades (10) are fixedly connected to the outer side of the drive rod (7). Several round holes (14) are opened on the stirring blades (10). An exhaust pipe (16) and a second return pipe (20) are fixedly inserted into the top of the cylinder (1). A first return pipe (18) is fixedly connected between the exhaust pipe (16) and the second return pipe (20). A fixed cover (21) is fixedly connected to the top of the second return pipe (20). A driven rod (22) is rotatably connected to the top of the fixed cover (21). Several blades (24) are fixedly connected to the bottom of the driven rod (22). A small grooved wheel (23) is fixedly sleeved on the outer top of the driven rod (22).

2. The tail gas recovery device for an octabromoether flame retardant according to claim 1, characterized in that: The bottom of the cylinder (1) is fixedly connected with four support legs (2), the bottom of the cylinder (1) is fixedly connected with a discharge valve (3), the right side wall of the cylinder (1) is fixedly connected with a feed valve (4) near the top, and the top of the cylinder (1) is fixedly connected with a tail gas inlet pipe (5) and a carbon dioxide inlet pipe (6).

3. The tail gas recovery device for an octabromoether flame retardant according to claim 1, characterized in that: The motor (8) has a mounting plate (9) on its rear side. The motor (8) is mounted on the mounting plate (9) by screws. The mounting plate (9) is fixedly connected to the top of the cylinder (1). The power output end of the motor (8) is fixedly connected to the drive rod (7).

4. The tail gas recovery device for an octabromoether flame retardant according to claim 1, characterized in that: The turning screw (11) is located near the bottom of the drive rod (7). The stirring blade (10) is inclined. The inner cavity of the cylinder (1) is provided with a scraper (12). Two connecting rods (13) are fixedly connected to the right side of the scraper (12). The connecting rods (13) are fixedly connected to the drive rod (7).

5. The tail gas recovery device for an octabromoether flame retardant according to claim 1, characterized in that: The first return pipe (18) is connected to the exhaust pipe (16) and the second return pipe (20) respectively. The first return pipe (18) is provided with a stop valve (19) that matches it, and the exhaust pipe (16) is provided with an exhaust valve (17) that matches it.

6. The tail gas recovery device for an octabromoether flame retardant according to claim 1, characterized in that: A belt (25) is provided between the large grooved wheel (15) and the small grooved wheel (23), and the large grooved wheel (15) and the small grooved wheel (23) are connected by the belt (25).

Images