Tail gas absorption system for novel flame-retardant ABS (acrylonitrile-butadiene-styrene) material

Abstract

The utility model discloses a tail gas absorption system for a novel flame-retardant ABS (Acrylonitrile Butadiene Styrene) material, which belongs to the technical field of ABS resin production and comprises a spraying box, a waste gas inlet is arranged on the spraying box, a gas transmission port is arranged at the top of the spraying box, the spraying box is communicated with a first filter box through the gas transmission port, and a gas outlet at the top of the first filter box is connected with a second filter box. An air outlet is formed in the top of the second filter box; a water spraying assembly is arranged in the spraying box, a water outlet in the bottom of the spraying box is connected with a water outlet pipe, a valve is arranged on the water outlet pipe, the water outlet pipe is connected with an extraction box, a liquid outlet of the extraction box is connected with a liquid pipe, and the position, away from the liquid outlet, of the liquid pipe is connected with an organic phase recycling tank and a waste water collecting tank. And a second water pump is arranged between the wastewater collecting tank and the spraying box. According to the device, the extraction box is arranged, acrylonitrile and butadiene dissolved in wastewater are extracted into an organic phase, and the extracted wastewater can be directly discharged without polluting the environment.

Description

Technical Field

[0001] This utility model relates to the field of ABS resin production technology, specifically to a tail gas absorption system for flame-retardant ABS new materials. Background Technology

[0002] ABS resin is a thermoplastic polymer material that can be blended with various resins to form blends. It is commonly used in the processing and production of alloys and plastics. During the industrial production and processing of ABS resin, a certain amount of organic waste gas is generated. Its main components are trace amounts of acrylonitrile, butadiene, styrene, xylene, etc. Direct emission will cause certain pollution to the environment. Therefore, it is necessary to use waste gas treatment devices to filter and treat the waste gas.

[0003] Existing exhaust gas treatment devices use water to wash the exhaust gas, separating impurities from the gas and recycling the water. However, since acrylonitrile and butadiene are slightly soluble in water, some acrylonitrile and butadiene dissolve in the water during the waste gas washing process. This means the used water cannot be directly discharged. Furthermore, separating impurities from the exhaust gas usually requires a large amount of water, increasing the difficulty of treating the organic matter in the wastewater directly.

[0004] In view of the problems existing in the prior art, this utility model combines years of design and use experience in related fields to design and manufacture a tail gas absorption system for flame-retardant ABS material to overcome the above defects. Utility Model Content

[0005] To address the problems existing in the prior art, this utility model provides a tail gas absorption system for flame-retardant ABS materials, which extracts water-soluble acrylonitrile and butadiene into the organic phase, allowing wastewater to be directly discharged and simplifying tail gas treatment operations.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a tail gas absorption system for flame-retardant ABS new material, including a spray box, the spray box is provided with a waste gas inlet, the top of the spray box is provided with a gas inlet, the spray box is connected to a first filter box through its gas inlet, the gas outlet at the top of the first filter box is connected to a second filter box, and the top of the second filter box is provided with a vent.

[0007] The spray box is equipped with a water spraying assembly. A water outlet is connected to the bottom of the spray box and a water outlet pipe is installed on the water outlet pipe. The water outlet pipe is connected to an extraction box. The liquid outlet of the extraction box is connected to a liquid pipe. An organic phase recovery tank and a wastewater collection tank are connected to the liquid pipe away from the liquid outlet. The organic phase recovery tank and the extraction box are connected through a first pipe and a first water pump is installed on the first pipe. The wastewater collection tank and the spray box are connected through a second pipe and a second water pump is installed on the second pipe.

[0008] Preferably, the liquid inlet of the organic phase recovery tank is connected with an organic phase pipe, the liquid inlet of the wastewater collection tank is connected with a wastewater pipe, and the liquid pipe, the organic phase pipe and the wastewater pipe are communicated through a three-way valve.

[0009] Preferably, the water spraying assembly is located at the top end of the inner wall of the spraying box, the water spraying assembly comprises a plurality of spraying pipes, the plurality of spraying pipes are horizontally distributed, and a plurality of spray heads are arranged on the spraying pipes; the second pipeline comprises a water inlet pipe, the spraying pipes are communicated with the water inlet pipe, and the end of the water inlet pipe away from the spraying pipes extends out of the spraying box and is connected with the water outlet end of the second water pump.

[0010] Preferably, a gas permeable film is arranged on the gas inlet of the spraying box.

[0011] Preferably, a plurality of activated carbon filter layers are horizontally arranged in the first filter box and the second filter box, and the plurality of activated carbon filter layers are distributed along the vertical direction.

[0012] Preferably, a gas return port is arranged at the top of the second filter box, the gas return port is connected with the first filter box through a gas return pipe, a fan is arranged on the gas return pipe, and a valve is arranged on the gas return pipe.

[0013] The gas inlet of the spraying box is arranged on the opposite side of the gas outlet of the first filter box, and the gas outlet of the first filter box is arranged on the opposite side of the gas discharge port of the second filter box.

[0014] Preferably, the gas discharge port is connected with a gas discharge pipe, and a detection element and a valve are arranged on the gas discharge pipe.

[0015] Preferably, the extraction box is located below the spraying box, a rotating shaft is rotatably arranged in the extraction box, the rotating shaft is vertically arranged, a plurality of first stirring rods are arranged on the rotating shaft, and the bottom end of the rotating shaft penetrates through the extraction box and is connected with a motor.

[0016] Preferably, a horizontally arranged fixing plate and a filter plate are arranged on the extraction box, the fixing plate is located below the filter plate, the top end of the rotating shaft is rotatably connected with the fixing plate, and a driving bevel gear is arranged on the upper portion of the rotating shaft.

[0017] Two pushing assemblies are arranged in the extraction box, the two pushing assemblies are symmetrically arranged with respect to the rotating shaft, the pushing assembly comprises a rotating rod, the rotating rod extends horizontally, one end of the rotating rod is rotatably connected with the side wall of the extraction box, the other end of the rotating rod is fixedly connected with a driven bevel gear, the driven bevel gear is engaged with the driving bevel gear, a second stirring rod is arranged on the rotating rod, the second stirring rod extends vertically, a plurality of through holes are arranged on the fixing plate, the second stirring rod can rotate and pass through the through holes to push the filter plate to move in the vertical direction.

[0018] The utility model discloses the beneficial part lies in:

[0019] 1. The utility model discloses extraction box, the acrylonitrile and butadiene dissolved in waste water are extracted to the organic phase, and the waste water after extraction enters the waste water collection jar and is recycled, and the later-stage waste water can be directly discharged and will not pollute the environment.

[0020] 2. The utility model discloses the driving bevel gear drives driven bevel gear rotation, and then drives the rotation of the push assembly, utilizes the second stirring rod on the push assembly and pushes the filter plate to move in the vertical direction, avoids the impurity and blocks the filter plate, and first stirring rod and second stirring rod carry out horizontal, up-down direction stirring respectively to the liquid in extraction box, makes organic solvent and waste water fully mix, reduces the extraction time. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a kind of schematic diagram of tail gas absorption system for new material of flame-retardant ABS.

[0022] Figure 2 It is a kind of schematic diagram of filter plate of tail gas absorption system for new material of flame-retardant ABS.

[0023] In the drawing: 1-spraying box, 2-waste gas import, 3-spraying pipe, 4-shower nozzle, 5-outlet pipe, 6-extraction box, 7-liquid pipe, 8-organic phase pipe, 9-waste water pipeline, 10-motor, 11-rotation shaft, 12-first stirring rod, 13-filter plate, 14-organic phase recovery jar, 15-first water pump, 16-waste water collection jar, 17-water inlet pipe, 18-second water pump, 19-gas inlet, 20-first filter box, 21-second filter box, 22-activated carbon filter layer, 23-permeable membrane, 24-gas discharge pipe, 25-fan, 26-gas return pipe, 27-fixing plate, 28-through hole, 29-rotary rod, 30-second stirring rod, 31-driven bevel gear, 32-driving bevel gear. DETAILED DESCRIPTION

[0024] In order to facilitate the person skilled in the art to understand, the utility model is further explained below in conjunction with the drawings.

[0025] As Figure 1 , Figure 2As shown, a kind of tail gas absorption system for new flame-retardant ABS material, including spray tank 1, and the waste gas inlet 2 is equipped on spray tank 1, and the water outlet is equipped in the bottom of spray tank 1.Exhaust pipe 5 is connected with water outlet, and valve is equipped on exhaust pipe 5.Exhaust pipe 5 is connected with extraction tank 6, and the liquid outlet in the bottom of extraction tank 6 is connected with liquid pipe 7, and liquid pipe 7 is connected with organic phase recovery tank 14 and waste water collection tank 16 respectively far from liquid outlet.Organic phase recovery tank 14 is communicated with extraction tank 6 by first pipeline, and first water pump 15 is equipped on first pipeline.Waste water collection tank 16 is communicated with spray tank 1 by second pipeline, and second water pump 18 is equipped on second pipeline.Water spraying assembly is equipped in spray tank 1, specifically, water spraying assembly is located in the top end of the inner wall of spray tank 1, and water spraying assembly includes several spray pipes 3, and several spray pipes 3 are horizontally distributed, and several spray heads 4 are equipped on spray pipe 3.Second pipeline includes water inlet pipe 17, and spray pipe 3 is communicated with water inlet pipe 17, and the end of water inlet pipe 17 far from spray pipe 3 is stretched out of spray tank 1 and is connected with the water outlet end of second water pump 18.

[0026] The utility model discloses a water spraying assembly sprays water, and water separates impurities from gas in waste gas.Because acrylonitrile and butadiene in waste gas are slightly soluble in water, water will dissolve a small amount of acrylonitrile and butadiene while separating impurities, and direct discharge of waste water in later period will cause pollution.The utility model is equipped with extraction tank 6, and the solubility of acrylonitrile and butadiene in organic solvent is big, so organic solvent is passed into extraction tank 6, acrylonitrile and butadiene are extracted from waste water into organic solvent, and the two are separated by delamination of organic solvent and water in later period.Organic solvent is preferably reagent that can dissolve acrylonitrile and butadiene simultaneously and is not mutually soluble with water, and preferably is carbon tetrachloride.Waste water can be directly discharged after using multiple times, and the utility model discloses a method that will not cause influence on environment.Both organic solvent and waste water can be recycled and utilized, to avoid waste.

[0027] Specifically, the liquid inlet of organic phase recovery tank 14 is connected with organic phase pipe 8, the liquid inlet of waste water collection tank 16 is connected with waste water pipeline 9, and liquid pipe 7, organic phase pipe 8 and waste water pipeline 9 are communicated through three-way valve.Waste water discharge port is equipped on waste water collection tank 16, and pipeline is connected on waste water discharge port, and valve is equipped on the pipeline connected on waste water discharge port.Organic phase discharge port is equipped on organic phase recovery tank 14, and pipeline is connected on organic phase discharge port, and valve is equipped on the pipeline connected on organic phase discharge port.

[0028] Waste water is discharged through waste water discharge port after recycling multiple times, and organic solvent can be discharged into rectifying column to separate organic matter through organic phase discharge port after recycling multiple times.

[0029] The top of the spray tank 1 is provided with a gas inlet 19, the gas inlet 19 is communicated with a first filter tank 20, the top of the first filter tank 20 is connected with a second filter tank 21, and the top of the second filter tank 21 is provided with a gas outlet. Specifically, a plurality of activated carbon filter layers 22 are horizontally arranged in the first filter tank 20 and the second filter tank 21, and the plurality of activated carbon filter layers 22 are distributed along the vertical direction. The top of the second filter tank 21 is provided with a gas return port, the gas return port is connected with the first filter tank 20 through a gas return pipe 26, a fan 25 is arranged on the gas return pipe 26, and a valve is arranged on the gas return pipe 26. The gas inlet 19 of the spray tank 1 is arranged on the opposite side of the gas outlet of the first filter tank 20, and the gas outlet of the first filter tank 20 is arranged on the opposite side of the gas outlet of the second filter tank 21, so that the residence time of the waste gas in the first filter tank 20 and the second filter tank 21 is increased. The gas outlet is connected with a gas outlet pipe 24, and a detection element and a valve are arranged on the gas outlet pipe 24.

[0030] The gas inlet 19 is arranged at the top of the utility model, the gas density is small, and the gas is beneficial to diffuse upward into the first filter tank 20. The composition of the waste gas generated in the ABS resin production is relatively complex, and two filter tanks are arranged to filter out harmful substances in the waste gas. The composition of the filtered gas can be detected through the detection element.

[0031] Specifically, the waste gas inlet 2 on the spray tank 1 is located below the spray head 4, and the waste gas inlet 2 and the gas inlet 19 on the spray tank 1 are respectively located on the two sides of the plurality of spray pipes 3. The water spraying assembly can form a water curtain in the spray tank 1, and the waste gas can be sprayed by the water spraying assembly before entering the gas inlet 19, so that the impurities in the waste gas can be effectively separated. The gas inlet 19 of the spray tank 1 is provided with a breathable film 23, the breathable film 23 prevents a small amount of unseparated impurities from passing through, and the impurity separation effect is improved.

[0032] The extraction tank 6 is located below the spray tank 1, a rotating shaft 11 is rotatably arranged in the extraction tank 6, the rotating shaft 11 is vertically arranged, a plurality of first stirring rods 12 are arranged on the rotating shaft 11, and the bottom end of the rotating shaft 11 penetrates through the extraction tank 6 and is connected with a motor 10. A fixed plate 27 is horizontally arranged on the extraction tank 6, the top end of the rotating shaft 11 is rotatably connected with the fixed plate 27, and a driving bevel gear 32 is arranged on the upper portion of the rotating shaft 11. Two pushing assemblies are arranged in the extraction tank 6 and are symmetrically arranged with the rotating shaft 11. The pushing assembly comprises a rotating rod 29, and the rotating rod 29 extends horizontally. One end of the rotating rod 29 is rotatably connected with the side wall of the extraction tank 6, and the other end of the rotating rod 29 is fixedly provided with a driven bevel gear 31, and the driven bevel gear 31 is meshed with the driving bevel gear 32. A second stirring rod 30 is arranged on the rotating rod 29 and extends vertically. The first stirring rod 12 can stir in the horizontal direction, and the second stirring rod 30 can stir in the vertical direction, so that the mixing of the organic phase and the waste water is accelerated, and the extraction time is reduced.

[0033] The extraction box 6 is provided with a horizontal filter plate 13, and a fixed plate 27 is arranged below the filter plate 13. The fixed plate 27 is provided with a plurality of through holes 28, and the through holes 28 are rectangular. The waste liquid flows to the lower side of the extraction box 6 through the through holes 28. The second stirring rod 30 can pass through the through holes 28, and the free end of the second stirring rod 30 is rotated to the upper side of the fixed plate 27, so as to push the filter plate 13 to move upward. When the free end of the second stirring rod 30 is rotated to the highest point and then rotates downward from top to bottom, the filter plate 13 moves downward under the action of gravity, and the filter plate 13 reciprocatingly moves upward and downward, so that the filter plate 13 is prevented from being blocked by impurities.

[0034] In order to ensure the stability of the upward and downward movement of the filter plate 13, referring to Figure 2 , longitudinal sliding strips are arranged on the opposite side walls of the extraction box 6, and the two ends of the filter plate 13 are provided with grooves matched with the longitudinal sliding strips. The filter plate 13 is slidably connected with the longitudinal sliding strips through the grooves. The longitudinal sliding strips guide the movement of the filter plate 13.

[0035] Specific operation process

[0036] Firstly, the waste gas is introduced into the spraying box 1 through the waste gas inlet 2, and the second water pump 18 is started to pump the waste water in the waste water collecting tank 16 into the water inlet pipe 17. The waste water enters the spraying pipe 3 from the water inlet pipe 17 and is sprayed out from the spray head 4. The waste water contacts with the waste gas to separate the impurities and the gas in the waste gas, and part of the acrylonitrile and butadiene in the waste gas is dissolved in the waste water. The first water pump 15 is started to pump the carbon tetrachloride in the organic phase recovery tank 14 into the extraction box 6. The valve on the water outlet pipe 5 is opened, the waste water flows into the extraction box 6 from the water outlet pipe 5, and the filter plate 13 filters the impurities. At the same time, the motor 10 is started to drive the rotating shaft 11 to rotate, and the rotating shaft 11 drives the first stirring rod 12 and the driving bevel gear 32 to rotate. The driving bevel gear 32 drives the driven bevel gear 31 to rotate, the driven bevel gear 31 drives the rotating rod 29 to rotate, and the rotating rod 29 drives the second stirring rod 30 to rotate. The second stirring rod 30 and the first stirring rod 12 stir the carbon tetrachloride and the waste water, the carbon tetrachloride extracts the acrylonitrile and butadiene in the waste water, and the second stirring rod 30 moves the filter plate 13 in the vertical direction when rotating.

[0037] The motor 10 is turned off, and the liquid in the extraction box 6 is static for a period of time. The carbon tetrachloride and the waste water are layered, and the waste water is located in the upper layer. The communication between the liquid pipe 7 and the organic phase pipe 8 of the three-way valve is opened, and the carbon tetrachloride flows into the organic phase recovery tank 14. After the carbon tetrachloride is completely flowed, the communication between the liquid pipe 7 and the organic phase pipe 8 of the three-way valve is closed, the communication between the liquid pipe 7 and the waste water pipe 9 of the three-way valve is opened, and the waste water in the extraction box 6 flows into the waste water collecting tank 16.

[0038] The gas after separating the impurities diffuses upwardly, and enters the first filter box 20 and the second filter box 21 in sequence from the gas inlet 19 at the top of the spraying box 1, and the harmful substances in the gas are adsorbed by the activated carbon filter layer 22. When the valve on the gas discharge pipe 24 is opened, the gas is detected by the detection element, and the gas meeting the standard is discharged. When the detection does not meet the standard, the valve on the gas discharge pipe 24 is closed, the valve on the gas return pipe 26 and the fan 25 are opened, the fan 25 draws the gas in the second filter box 21 into the first filter box 20 for reprocessing, and the gas meeting the standard is discharged through the gas discharge pipe 24.

[0039] It should be understood that the use of these embodiments is only for the purpose of illustrating the present application and is not intended to limit the scope of protection of the present application. In addition, it should also be understood that after reading the technical content of the present application, those skilled in the art can make various modifications, modifications and / or variations to the present application, and all these equivalent forms also fall within the protection scope defined by the claims attached to the present application.

Claims

1. A tail gas absorption system for a new flame-retardant ABS material, characterized in that, The utility model provides a waste gas treatment device, including the spray tank (1), be equipped with waste gas import (2) on the spray tank (1), the top of spray tank (1) is equipped with gas inlet (19), the first filter tank (20) is connected with the gas inlet (19) of spray tank (1) through it, the gas outlet of the top of first filter tank (20) is connected with second filter tank (21), and the top of second filter tank (21) is equipped with gas outlet port; The spray tank (1) is provided with a water spraying assembly, a water outlet is connected to the bottom of the spray tank (1), a water outlet pipe (5) is arranged on the water outlet, a valve is arranged on the water outlet pipe (5), the water outlet pipe (5) is connected to an extraction tank (6), a liquid outlet of the extraction tank (6) is connected to a liquid pipe (7), the liquid pipe (7) is connected to an organic phase recovery tank (14) and a waste water collection tank (16) away from the liquid outlet, the organic phase recovery tank (14) is communicated with the extraction tank (6) through a first pipeline, a first water pump (15) is arranged on the first pipeline, the waste water collection tank (16) is communicated with the spray tank (1) through a second pipeline, and a second water pump (18) is arranged on the second pipeline.

2. The tail gas absorption system for the new flame-retardant ABS material according to claim 1, characterized in that, The liquid inlet of the organic phase recovery tank (14) is connected to an organic phase pipe (8), the liquid inlet of the waste water collection tank (16) is connected to a waste water pipe (9), and the liquid pipe (7), the organic phase pipe (8), and the waste water pipe (9) are communicated through a three-way valve.

3. The tail gas absorption system for the new flame-retardant ABS material of claim 1, characterized in that, The water spraying assembly is located at the top end of the inner wall of the spray tank (1), the water spraying assembly includes a plurality of spray pipes (3), the plurality of spray pipes (3) are horizontally distributed, and a plurality of spray heads (4) are arranged on the spray pipes (3); the second pipeline includes a water inlet pipe (17), the spray pipes (3) are communicated with the water inlet pipe (17), one end of the water inlet pipe (17) away from the spray pipes (3) extends out of the spray tank (1) and is connected to the water outlet end of the second water pump (18).

4. The tail gas absorption system for the new flame-retardant ABS material of claim 1, characterized in that, The gas inlet (19) of the spray tank (1) is provided with a gas permeable membrane (23).

5. The tail gas absorption system for the new flame-retardant ABS material of claim 1, characterized in that, A plurality of activated carbon filter layers (22) are horizontally arranged in the first filter tank (20) and the second filter tank (21), and the plurality of activated carbon filter layers (22) are distributed in the vertical direction.

6. The tail gas absorption system for the new flame-retardant ABS material of claim 1, characterized in that, The top of the second filter tank (21) is provided with a gas return port, the gas return port is connected to the first filter tank (20) through a gas return pipe (26), a fan (25) is arranged on the gas return pipe (26), and a valve is arranged on the gas return pipe (26); The gas inlet (19) of the spray tank (1) and the gas outlet of the first filter tank (20) are arranged on the opposite sides, and the gas outlet of the first filter tank (20) and the gas outlet port of the second filter tank (21) are arranged on the opposite sides.

7. The tail gas absorption system for the new flame-retardant ABS material of claim 1, characterized in that, The gas outlet port is connected to a gas outlet pipe (24), and a detection element and a valve are arranged on the gas outlet pipe (24). 8.The tail gas absorption system for a new flame-retardant ABS material according to claim 1, characterized in that, The extraction tank (6) is located below the spray tank (1), a rotating shaft (11) is rotatably arranged in the extraction tank (6), the rotating shaft (11) is vertically arranged, a plurality of first stirring rods (12) are arranged on the rotating shaft (11), and the bottom end of the rotating shaft (11) penetrates the extraction tank (6) and is connected to a motor (10). 9.The tail gas absorption system for a new flame-retardant ABS material according to claim 8, characterized in that, The extraction box (6) is provided with a horizontal fixed plate (27) and a filter plate (13), the fixed plate (27) is below the filter plate (13), the top end of the rotating shaft (11) is rotationally connected with the fixed plate (27), and the upper portion of the rotating shaft (11) is provided with a driving bevel gear (32); The extraction box (6) is provided with two pushing assemblies, the two pushing assemblies are symmetrically arranged with the rotating shaft (11), the pushing assembly comprises a rotating rod (29), the rotating rod (29) extends horizontally, one end of the rotating rod (29) is rotationally connected with the side wall of the extraction box (6), the other end of the rotating rod (29) is fixedly provided with a driven bevel gear (31), the driven bevel gear (31) is meshed with the driving bevel gear (32), the rotating rod (29) is provided with a second stirring rod (30), and the second stirring rod (30) extends vertically; a plurality of through holes (28) are formed in the fixed plate (27), the second stirring rod (30) rotationally penetrates the through holes (28), and the filter plate (13) is pushed to move in the vertical direction.

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