Waste gas treatment device for modified plastic production

Abstract

The utility model discloses a waste gas treatment device for modified plastic production, and belongs to the technical field of modified plastic waste gas treatment. Comprising a gas collection assembly, a spraying assembly connected with the gas outlet end of the gas collection assembly, a drying assembly connected with the gas outlet end of the spraying assembly, and an adsorption assembly connected with the gas outlet end of the drying assembly; the spraying assembly comprises a spraying tower, a spraying plate arranged in the spraying tower, a cavity formed in the spraying plate, a plurality of spraying heads arranged at the bottom end of the spraying tower and connected with the cavity, a water conveying device connected with the spraying plate and a filter screen arranged in the spraying tower and located below the spraying heads. The adsorption assembly comprises an adsorption tower, a first gas distribution disc arranged at the top of the adsorption tower, and granular activated carbon arranged in the adsorption tower. The waste gas treatment device can effectively achieve the purpose of removing solid impurities and volatile organic compounds in waste gas.

Description

TECHNICAL FIELD

[0001] The utility model relates to modified plastics waste gas treatment technical field especially, it relates to a waste gas treatment device for modified plastics production. BACKGROUND

[0002] Modified plastics, it is the plastic product that refers to on the basis of general plastics and engineering plastics, through filling, blending, reinforcing etc. Method processing, improved flame retardancy, strength, impact resistance, toughness etc. Performance.

[0003] In modified plastics production process (especially melt process and cooling process of extruder), a large amount of waste gas will be produced, these waste gas mainly are volatile organic gas and a small amount of solid impurities. Waste gas if direct emission to the environment, not only can cause huge pollution to the environment, simultaneously can cause huge harm to human health. UTILITY MODEL CONTENT

[0004] The utility model discloses a waste gas treatment device for modified plastics production, it can effectively treat the waste gas in modified plastics production, to maximum degree reduce the particulate matter and volatile organic gas in waste gas, reduce its harm to the environment and human body.

[0005] The utility model discloses a waste gas treatment device for modified plastics production, it can effectively treat the waste gas in modified plastics production, to maximum degree reduce the particulate matter and volatile organic gas in waste gas, reduce its harm to the environment and human body.

[0006] A waste gas treatment device for modified plastics production, including gas collecting component, with the gas collecting component gas outlet end connected's spray component, with the spray component gas outlet end connected's drying component and with the drying component gas outlet end connected's adsorption component;

[0007] The spray component includes spray tower, sets up the spray board in the spray tower, sets up the cavity in the spray board inside, sets up a plurality of spray heads in the spray tower bottom end and is connected with the cavity, with the water delivery device that spray board is connected and sets up the filter screen in the spray tower and is located below the spray head;

[0008] The adsorption component includes adsorption tower, sets up the first gas distribution disc at the adsorption tower top and sets up the granular activated carbon in the adsorption tower.

[0009] Preferably, the gas collecting component includes a gas collecting hood, a gas collecting pipe connected to the gas collecting hood, and a gas pump arranged on the gas collecting pipe; the gas outlet end of the gas collecting pipe is connected to the spray tower.

[0010] Preferably, the drying component includes a drying tower, a second gas distribution disc arranged at the top of the drying tower, and a granular drying agent arranged in the drying tower.

[0011] Preferably, the side wall of the drying tower is provided with a transparent window.

[0012] Preferably, the bottom of the drying tower is provided with a third gas distribution plate, the bottom end of the drying tower is provided with a hot gas tank, the top end of the hot gas tank is provided with a hot gas pipe connected with the third gas distribution plate, the hot gas tank is provided with a heating pipe, and the hot gas tank is connected with a gas cylinder through an air pipe.

[0013] Preferably, the top end of the spray tower is provided with a top cover, the spray plate is arranged on the top cover, the top cover and the spray tower are detachably connected, and the filter screen and the inner wall of the adsorption tower are detachably connected.

[0014] Preferably, the inner wall of the spray tower is provided with a supporting block for supporting the filter screen, and the bottom end of the top cover is provided with a limiting rod capable of contacting the filter screen.

[0015] Compared with the prior art, the utility model has the beneficial effects as follows:

[0016] By setting the gas collecting assembly, the waste gas in the modified plastic production can be collected, by setting the spraying assembly, the waste gas collected by the gas collecting assembly can be sprayed to cool the waste gas, and the solid impurities and high-boiling-point organic matters in the waste gas can be effectively removed. After the waste gas is sprayed, a large amount of moisture is contained. If the moisture is directly discharged into the adsorption assembly, the adsorption effect of the activated carbon adsorbent will be affected, and the adsorption performance of volatile organic compounds will be reduced. Therefore, the drying assembly is arranged at the gas outlet end of the spraying assembly. By setting the drying assembly, the waste gas discharged from the spraying assembly can be dried, so that the adsorption effect of the subsequent adsorption assembly is not affected due to the high moisture content of the waste gas.

[0017] Through the synergistic effect of the above-mentioned devices, the purpose of removing the solid impurities and volatile organic compounds in the waste gas can be effectively achieved. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a sectional structure schematic view of the front direction of the embodiment 1;

[0019] Figure 2 It is a sectional structure schematic view of the front direction of the embodiment 1; Figure 1 It is a sectional structure schematic view of the front direction of the embodiment 1;

[0020] Figure 3 It is a sectional structure schematic view of the front direction of the embodiment 1; Figure 1 It is a sectional structure schematic view of the front direction of the embodiment 1;

[0021] In the diagram: 1-Spray tower, 2-Spray plate, 3-Cavity, 4-Spray head, 5-Filter screen, 6-Adsorption tower, 7-First gas distribution plate, 8-Gas collection hood, 9-Gas collection pipe, 10-Air pump, 11-Drying tower, 12-Second gas distribution plate, 13-Third gas distribution plate, 14-Hot air box, 15-Hot air pipe, 16-Heating pipe, 18-Top cover, 19-Support block, 20-Limiting rod. Detailed Implementation

[0022] Example 1

[0023] A waste gas treatment device for modified plastics production, such as Figure 1 As shown, it includes a gas collection assembly, a spray assembly connected to the gas outlet of the gas collection assembly, a drying assembly connected to the gas outlet of the spray assembly, and an adsorption assembly connected to the gas outlet of the drying assembly. Specifically, as... Figure 1 As shown, the gas collection assembly includes a gas collection hood 8, a gas collection pipe 9 connected to the gas collection hood 8, and an air pump 10 mounted on the gas collection pipe 9; the outlet end of the gas collection pipe 9 is connected to the spray tower 1. The gas collection hood 8 can be installed in an area conducive to collecting waste gas, such as the top or surrounding area of ​​the extruder. To maximize waste gas collection, multiple gas collection assemblies can be installed in practice, and the installation direction of the gas collection hood 8 can be adjusted arbitrarily. The gas collection hood 8 can be connected to the ground or the extruder via a connecting device (existing technology, not shown in the figure), such as a connecting rod. Figure 1 As shown, the spray assembly includes a spray tower 1, a spray plate 2 disposed within the spray tower 1, a cavity 3 disposed within the spray plate 2, multiple nozzles 4 disposed at the bottom of the spray tower 1 and connected to the cavity 3, a water supply device connected to the spray plate 2, and a filter screen 5 disposed within the spray tower 1 and located below the nozzles 4. A drain pipe with a valve is disposed at the bottom of the spray tower 1. The water supply device includes a flexible hose that penetrates the top wall of the spray tower 1 and the side wall of the spray plate 2 and communicates with the cavity 3, a water tank (not shown in the figure) connected to the inlet end of the hose, and a water pump (not shown in the figure) mounted on the hose. Further, as... Figure 1 As shown, the drying assembly includes a drying tower 11, a second gas distribution plate 12 (existing technology) disposed at the top of the drying tower 11, and a granular desiccant (color-changing silica gel is used in this invention) disposed within the drying tower 11. Further, as... Figure 1 As shown, the adsorption assembly includes an adsorption tower 6, a first gas distribution plate 7 (prior art) disposed at the top of the adsorption tower 6, and granular activated carbon (prior art, not shown in the figure) disposed within the adsorption tower 6. Furthermore, the drying tower 11 has transparent windows on its sidewalls. Wherein, as... Figure 1As shown, the spray tower 1 and the drying tower 11, the drying tower 11 and the adsorption tower 6 are communicated through connecting pipes, and the lower part of the sidewall of the adsorption tower 6 is provided with a first exhaust pipe.

[0024] Working principle: in the process of modified plastic extrusion, open the air pump 10, so that the exhaust gas is sucked into the gas hood 8 and the gas collecting pipe 9, and then enters the spray tower 1 along the gas collecting pipe 9. Before opening the air pump 10, open the water pump first, so that the water in the water tank enters the cavity 3 along the infusion pipe and is sprayed out through the spray head 4. After the exhaust gas contacts with the spray liquid, rapid cooling is realized, and at the same time, solid impurities and high boiling point organic matters in the exhaust gas are effectively removed. Then the sprayed exhaust gas is discharged into the drying assembly, dried by the color-changing silica gel in the drying assembly, and then discharged into the adsorption tower 6 after adsorption by activated carbon, and finally discharged through the exhaust pipe.

[0025] Among them, in the spray tower 1, the solid impurities in the exhaust gas fall together with the spray liquid, and finally are blocked by the filter screen 5 to reduce the solid content of the liquid discharged from the liquid discharge pipe.

[0026] Through the synergistic effect of the above-mentioned devices, the purpose of removing solid impurities and volatile organic compounds in the exhaust gas can be effectively realized.

[0027] Example 2

[0028] On the basis of example 1, in order to clean or wash the filter screen 5, such as Figure 2 As shown, the top end of the spray tower 1 is provided with a top cover 18, and the top cover 18 and the spray tower 1 can be fixed by any existing buckle device (not shown in the figure) or fixed by bolts (not shown in the figure). The spray plate 2 and the infusion pipe are arranged on the top cover 18, the top cover 18 and the spray tower 1 are detachably connected, and the filter screen 5 and the inner wall of the adsorption tower 6 are detachably connected. Further, the inner wall of the spray tower 1 is provided with a supporting block 19 for supporting the filter screen 5, and the bottom end of the top cover 18 is provided with a limiting rod 20 which can contact the filter screen 5.

[0029] Working principle: as Figure 2 shown, when the top cover 18 covers the top end of the spray tower 1, the limiting rod 20 just contacts the top surface of the filter screen 5 to limit the filter screen 5 by the limiting rod 20 and the supporting block 19. When the spraying is finished, open the top cover 18, and take out the filter screen 5 from the spray tower 1 from bottom to top to realize the cleaning or washing of the filter screen 5. In actual implementation, the filter screen 5 and the inner wall of the spray tower 1 are slidingly connected.

[0030] Example 3

[0031] The color-changing silica gel is used as the drying agent in the embodiment 1, but the color-changing silica gel is not easy to be discharged from the container after absorbing water. Because the silica gel has strong moisture absorption capacity, once absorbing water, it will expand and tightly adhere to the container wall, and it is difficult to remove it from the container by hand or other tools, and based on this, it is difficult to take it out for heat desorption, and based on this, on the basis of the embodiment 1 or the embodiment 2, as shown in the formula Figure 3 As shown in the formula, the bottom of the drying tower 11 is provided with a third gas distribution plate 13, the bottom end of the drying tower 11 is provided with a hot air tank 14, the top end of the hot air tank 14 is provided with a hot air pipe 15 connected with the third gas distribution plate 13, the hot air tank 14 is provided with a heating pipe 16, the hot air tank 14 is connected with a gas cylinder (not shown in the figure) through an air pipe (a hose) arranged on the bottom wall, the gas cylinder contains inert gas such as nitrogen, and the air pipe is provided with a gas pump (not shown in the figure). The side wall of the drying tower 11 is provided with a transparent window (not shown in the figure), and the water absorption of the color-changing silica gel can be understood by observing the color-changing condition of the color-changing silica gel.

[0032] In the scheme, when the color-changing silica gel needs to be heat desorbed after changing color, the gas pump on the air pipe and the heating pipe 16 are directly opened, under the action of the two, hot air can be generated in the hot air tank, and then the hot air is introduced into the drying tower 11 through the hot air pipe 15 to heat desorb the color-changing silica gel in the drying tower 11, and the hot air in the desorption process is discharged along the second exhaust pipe at the top end of the drying tower 11. The present application directly carries out heat desorption in the drying tower 11, which can solve the technical problem that the silica gel is easy to adhere to the container, which leads to difficult and convenient removal.

Claims

1. An exhaust gas treatment device for modified plastic production, characterized by, The gas collecting assembly, the spray assembly connected with the gas outlet end of the gas collecting assembly, the drying assembly connected with the gas outlet end of the spray assembly, and the adsorption assembly connected with the gas outlet end of the drying assembly; The spray assembly comprises a spray tower (1), a spray plate (2) arranged in the spray tower (1), a cavity (3) arranged in the spray plate (2), a plurality of spray heads (4) arranged at the bottom end of the spray tower (1) and connected with the cavity (3), a water conveying device connected with the spray plate (2), and a filter screen (5) arranged in the spray tower (1) below the spray heads (4). The adsorption assembly comprises an adsorption tower (6), a first gas distribution disc (7) arranged at the top of the adsorption tower (6), and granular activated carbon arranged in the adsorption tower (6).

2. The waste gas treatment device for modified plastic production according to claim 1, characterized in that, The gas collecting assembly comprises a gas collecting cover (8), a gas collecting pipe (9) connected with the gas collecting cover (8), and a gas pump (10) arranged on the gas collecting pipe (9); the gas outlet end of the gas collecting pipe (9) is connected with the spray tower (1).

3. The waste gas treatment device for modified plastic production according to claim 1, characterized in that, The drying assembly comprises a drying tower (11), a second gas distribution disc (12) arranged at the top of the drying tower (11), and granular drying agent arranged in the drying tower (11).

4. The waste gas treatment device for modified plastic production according to claim 3, characterized in that, The side wall of the drying tower (11) is provided with a transparent window.

5. The waste gas treatment device for producing a modified plastic according to claim 3, characterized by The bottom of the drying tower (11) is provided with a third gas distribution disc (13), the bottom end of the drying tower (11) is provided with a hot gas tank (14), the top end of the hot gas tank (14) is provided with a hot gas pipe (15) connected with the third gas distribution disc (13), the hot gas tank (14) is provided with a heating pipe (16) therein, and the hot gas tank (14) is connected with a gas cylinder through an air pipe.

6. The waste gas treatment device for producing modified plastics according to claim 1, characterized in that, The top end of the spray tower (1) is provided with a top cover (18), the spray plate (2) is arranged on the top cover (18), the top cover (18) and the spray tower (1) are detachably connected, and the filter screen (5) and the inner wall of the adsorption tower (6) are detachably connected.

7. The waste gas treatment device for producing a modified plastic according to claim 6, characterized by The inner wall of the spray tower (1) is provided with a support block (19) for supporting the filter screen (5), and the bottom end of the top cover (18) is provided with a limiting rod (20) capable of contacting the filter screen (5).

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