Extruder tail gas absorption treatment device

Abstract

The utility model relates to an extruder tail gas absorption treatment device which comprises an absorption box, a fan and a water vapor separation tower, a gas inlet end and a gas outlet end are fixedly arranged on the absorption box, a gas inlet is formed in the gas inlet end, a guide plate is arranged in the gas inlet end, a distribution pipe and a partition plate are arranged in the absorption box, and the partition plate is arranged in the absorption box. A partition plate is arranged in the absorption box and divides the absorption box into a first spraying area and a second spraying area, a first water spraying pipe and a first absorption net plate are arranged in the first spraying area, and a second water spraying pipe and a second absorption net plate are arranged in the second spraying area; the first water spraying pipe and the second water spraying pipe are both communicated with the distribution pipe, and the fan is respectively connected with the air outlet end and the water-vapor separation tower through pipelines. According to the treatment device, the guide plate and two-stage water spraying absorption are utilized, so that the contact area of the tail gas and a water body is increased, and the treatment efficiency of pollutants in the tail gas is improved.

Description

Technical Field

[0001] This application relates to exhaust gas treatment technology, specifically to an extruder exhaust gas absorption and treatment device. Background Technology

[0002] In pigment masterbatch production, the base material, such as PET, is heated, melted, and extruded together with the pigment using a twin-screw extruder for granulation. The exhaust gas generated during this melting process carries solvents, additives, and base material particles. This exhaust gas is also high-temperature, typically above 200°C, and requires dust removal, absorption, and cooling before discharge. Wet scrubbing involves close contact between the exhaust gas and a liquid (usually water) to separate pollutants. It purifies both solid and gaseous particulate pollutants while also cooling the gas. Therefore, wet scrubbing is suitable for extruder exhaust gas. However, current exhaust gas treatment equipment is not very efficient, resulting in low absorption efficiency of impurities in the gas, which often leads to blockage of the fans downstream of the equipment. Utility Model Content

[0003] To overcome the above-mentioned defects, this application provides an extruder exhaust gas absorption and treatment device. This device uses a guide plate and two-stage water spray absorption to pre-cool the exhaust gas, increase the contact area between the exhaust gas and the water, prolong the absorption time, and improve the treatment efficiency of pollutants in the exhaust gas.

[0004] The technical solution adopted by this application to solve its technical problem is:

[0005] An extruder exhaust gas absorption and treatment device includes an absorption box, a fan, and a water vapor separation tower. The absorption box is fixedly provided with an air inlet and an air outlet. The air inlet has an air inlet port and a guide plate inside. The absorption box is provided with a distribution pipe and a partition plate. The partition plate divides the absorption box into a first spraying area and a second spraying area. The first spraying area is provided with a first water spray pipe and a first absorption screen plate. The second spraying area is provided with a second water spray pipe and a second absorption screen plate. The first water spray pipe and the second water spray pipe are both connected to the distribution pipe. The fan is connected to the air outlet and the water vapor separation tower through pipelines to transport the gas from the air outlet to the water vapor separation tower.

[0006] Optionally, the partition is vertically installed on the upper part of the absorption box, and the lower part of the absorption box is used to store spray water.

[0007] Optionally, it also includes a circulating water pump, which is connected to the lower part of the absorption tank through an inlet pipe and to the distribution pipe through an outlet pipe.

[0008] Optionally, the aperture of the first absorbent mesh plate is larger than that of the second absorbent mesh plate, and the first absorbent mesh plate is provided with a ball-like absorbent layer.

[0009] Optionally, it also includes an impurity cleaning unit for cleaning floating debris from the surface of the spray water in the absorption tank.

[0010] Optionally, the impurity cleaning unit includes a chain plate impurity cleaner and a waste collection box. The chain plate impurity cleaner extends into the absorption box and is equipped with a scraper. The impurity cleaning unit is equipped with multiple chain plates, each with multiple water filtering holes. The scraper is used to scrape impurities on the chain plates into the waste collection box.

[0011] Optionally, the chain plate impurity cleaner is installed at an angle in the absorption tank, with the first end of the chain plate impurity cleaner extending below the water surface of the absorption tank, the second end of the chain plate impurity cleaner located outside the absorption tank, and the waste collection tank located below the second end of the chain plate impurity cleaner.

[0012] Optionally, the upper part of the water vapor separation tower is a demister, the lower part of the water vapor separation tower is a water vapor separation chamber, the demister chamber is provided with an activated carbon absorption layer, and the water vapor separation chamber is provided with a multi-layer drawer-type mesh plate.

[0013] The beneficial effects of this application are as follows: A guide vane is provided at the air inlet to trap some low-molecular-weight compounds, reducing the absorption volume of the downstream spray and improving absorption efficiency. The guide vane and two-stage water spray absorption pre-cool the exhaust gas and increase the contact area between the exhaust gas and water, extending the absorption time and improving the treatment efficiency of pollutants in the exhaust gas, as well as the absorption efficiency of impurities in the gas. This application has the advantages of high absorption efficiency, low labor intensity, and strong practicality. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the absorption and treatment device in this application;

[0015] Figure 2 This is a schematic diagram of the water vapor separation tower in this application;

[0016] In the diagram: 100-Absorption box, 110-Air inlet, 111-Air inlet, 112-Guide plate, 120-Distribution pipe, 130-Baffle, 140-First spray area, 141-First water sprayer, 142-First absorption mesh plate, 143-Ball-type absorption layer, 150-Second spray area, 151-Second water sprayer, 152-Second absorption mesh plate, 160-Air outlet, 200-Circulating water pump, 210-Water inlet pipe, 220-Water outlet pipe, 300-Impurity cleaning unit, 310-Chain plate impurity cleaner, 311-Scraper, 320-Waste collection box, 400-Fan, 500-Water vapor separation tower, 510-Drawer-type mesh plate, 520-Activated carbon absorption layer. Detailed Implementation

[0017] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the embodiments of this application. Obviously, the embodiments described in this application are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0018] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such uses of the terms can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0019] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0020] Example: Figure 1-2 As shown, an extruder exhaust gas absorption and treatment device includes an absorption box 100, a fan 400, and a water vapor separation tower 500. The absorption box 100 is fixedly equipped with an inlet end 110 and an outlet end 160. The inlet end 110 has an inlet port 111 and a guide plate 112 inside. The absorption box 100 is equipped with a distribution pipe 120 and a partition plate 130. The partition plate 130 divides the absorption box 100 into a first spray zone 140 and a second spray zone 150. The first spray area 140 is provided with a first water spray pipe 141 and a first absorption screen plate 142, and the second spray area 150 is provided with a second water spray pipe 151 and a second absorption screen plate 152. The first water spray pipe 141 and the second water spray pipe 151 are both connected to the distribution pipe 120. The fan 400 is connected to the gas outlet 160 and the water vapor separation tower 500 through pipelines to transport the gas from the gas outlet 160 to the water vapor separation tower 500.

[0021] Optionally, the guide plate 112 has an arc-shaped structure. In this application, the absorption box 100, the fan 400, and the water vapor separator 500 are arranged along the direction of gas flow. After the fan 400 is turned on, the exhaust gas from the extruder enters the absorption box 100 through the air inlet 111 of the air inlet 110. The guide plate 112 allows the exhaust gas to have more contact with the inner wall of the air inlet 110. When the exhaust gas encounters the guide plate 112 and the inner wall of the air inlet 110, low-molecular-weight waxes condense and drip down. The remaining exhaust gas enters the first spray area 140, is sprayed by the water from the first water sprayer 141, and is filtered by the first absorption screen 142. The exhaust gas then enters the second spray area 150, is sprayed by the water from the second water sprayer 151, and is filtered by the second absorption screen 152. Most impurities are deposited and float on the water surface. The remaining gas enters the water vapor separator 500 through the fan 400 and is discharged after being separated from the water. In this application, a guide plate 112 is provided in the air inlet 110 to trap some low-molecular-weight compounds, reducing the absorption amount of the downstream spray and improving impurity settling and absorption efficiency. The guide plate 112 and two-stage water spray absorption pre-cool the exhaust gas and increase the contact area between the exhaust gas and water, extending the absorption time and improving the treatment efficiency of pollutants in the exhaust gas, as well as the absorption efficiency of impurities in the gas. This application has the advantages of high absorption efficiency, low labor intensity, and strong practicality.

[0022] like Figure 1 As shown, the partition 130 is vertically installed on the upper part of the absorption tank 100, and the lower part of the absorption tank 100 is used to store spray water. The partition 130 divides the upper part of the absorption tank 100 into two parts, namely the first spray area 140 and the second spray area 150, and the water sprayed by the first water sprayer 141 and the second water sprayer 151 falls into the lower part of the absorption tank 100.

[0023] like Figure 1 As shown, the treatment device also includes a circulating water pump 200, which is connected to the lower part of the absorption tank 100 via an inlet pipe 210 and to the distribution pipe 120 via an outlet pipe 220. The circulating water pump 200 recycles the water in the absorption tank 100, thus saving water resources.

[0024] Optionally, the aperture of the first absorbent mesh plate 142 is larger than the aperture of the second absorbent mesh plate 152, such as... Figure 1 As shown, the first absorption mesh plate 142 is provided with a ball-shaped absorption layer 143. After the exhaust gas is sprayed with water, it is filtered through the ball-shaped absorption layer 143 and the first absorption mesh plate 142, and then enters the second spray area 150 through the lower end of the partition plate 130, where it is filtered by the second absorption mesh plate 152, thereby improving the impurity absorption efficiency.

[0025] like Figure 1 As shown, the treatment device also includes an impurity cleaning unit 300, which is used to clean floating debris from the surface of the spray water in the absorption tank 100. The impurity cleaning unit 300 was added to address the high impurity content and large wastewater volume in the spray circulating water, in order to promptly remove floating debris from the water surface.

[0026] The impurity cleaning unit 300 includes a chain-plate impurity cleaner 310 and a waste collection box 320. The chain-plate impurity cleaner 310 extends into the absorption box 100 and is equipped with a scraper 311. The impurity cleaning unit 300 has multiple chain plates with multiple water-filtering holes. The scraper 311 is used to scrape impurities on the chain plates into the waste collection box 320. The water-filtering holes can filter out moisture from the impurities, achieving the effect of carrying out impurities and filtering out moisture. The scraper 311 can achieve the purpose of thoroughly scraping impurities off the chain plates.

[0027] The chain-plate type impurity cleaner 310 is installed at an angle in the absorption tank 100. The first end of the chain-plate type impurity cleaner 310 extends below the water surface in the absorption tank 100, and the second end of the chain-plate type impurity cleaner 310 is located outside the absorption tank 100. The waste collection tank 320 is located below the second end of the chain-plate type impurity cleaner 310. The chain-plate type impurity cleaner 310 can effectively remove and carry away impurities and floating particles, clean the water, extend the service life of circulating water, save water resources, and reduce the workload of manual cleaning.

[0028] Optionally, the upper part of the water vapor separation tower 500 is a demister, and the lower part of the water vapor separation tower 500 is a water vapor separation chamber, such as... Figure 2 As shown, the demister chamber is equipped with an activated carbon absorption layer 520, and the water vapor separation chamber is equipped with a multi-layer drawer-type mesh plate 510. To reduce the water vapor carried in the exhaust gas and prevent rusting of the exhaust gas pipes, the exhaust gas first passes through the water vapor separation chamber to separate most of the water vapor, and then passes through the demister chamber to remove almost all the water vapor from the exhaust gas. The bottom of the water vapor separation tower 500 has a condensate collector, which can be used to replenish the circulating water supply.

[0029] In this embodiment, the water vapor separation chamber is provided with three drawer-type mesh plates 510. The drawer-type mesh plates 510 can be stainless steel mesh plates, so that the exhaust gas can be separated into water vapor multiple times by passing through the drawer-type mesh plates 510, and then pass through the activated carbon absorption layer 520 of the demisting chamber to completely remove the water vapor. The drawer-type mesh plates 510 are easy to pull out for cleaning and are convenient to use.

[0030] The processing flow of the exhaust gas absorption and treatment device in this application includes the following steps: After the blower 400 is turned on, the exhaust gas from the extruder enters the absorption box 100 through the air inlet 111 of the air inlet 110. When the exhaust gas encounters the guide plate 112 and the inner wall of the air inlet 110, low-molecular-weight waxes condense and drip down. The remaining exhaust gas enters the first spray area 140, is sprayed by the water from the first water sprayer 141, and is filtered by the first absorption mesh plate 142. The exhaust gas then enters the second spray area 150, is sprayed by the water from the second water sprayer 151, and is filtered by the second absorption mesh plate 152. Most of the impurities are deposited and float on the water surface. The remaining gas enters the water vapor separator 500 through the blower 400, is separated by water mist after passing through multiple drawer-type mesh plates 510, and is then filtered by the activated carbon absorption layer 520 before being discharged into the air. After a certain thickness of floating matter has accumulated in the absorption box 100, the chain plate impurity cleaner 310 is turned on to collect and clean the impurities. The floating impurities on the water surface are attached to the chain plate impurity cleaner 310 and scraped off by the scraper 311, falling into the waste collection box 320, thus completing the cleaning of the absorption box 100.

[0031] It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the scope of protection of this patent application shall be determined by the appended claims.

Claims

1. An extruder exhaust gas absorption and treatment device, characterized in that: The system includes an absorption box (100), a fan (400), and a water vapor separation tower (500). The absorption box (100) is fixedly equipped with an air inlet (110) and an air outlet (160). The air inlet (110) has an air inlet (111) and a guide plate (112) inside. The absorption box (100) is equipped with a distribution pipe (120) and a partition (130). The partition (130) divides the absorption box (100) into a first spraying area (140) and a second spraying area (150). The first water spray pipe (141) and the first absorption screen plate (142) are provided in the spray area (140), and the second water spray pipe (151) and the second absorption screen plate (152) are provided in the second spray area (150). The first water spray pipe (141) and the second water spray pipe (151) are both connected to the distribution pipe (120). The fan (400) is connected to the gas outlet (160) and the water vapor separator (500) through pipelines to transport the gas from the gas outlet (160) to the water vapor separator (500).

2. The extruder exhaust gas absorption and treatment device according to claim 1, characterized in that: The partition (130) is vertically installed on the upper part of the absorption box (100), and the lower part of the absorption box (100) is used to store spray water.

3. The extruder exhaust gas absorption and treatment device according to claim 2, characterized in that: It also includes a circulating water pump (200), which is connected to the lower part of the absorption tank (100) through an inlet pipe (210) and to the distribution pipe (120) through an outlet pipe (220).

4. The extruder exhaust gas absorption and treatment device according to claim 1, characterized in that: The aperture of the first absorbent mesh plate (142) is larger than that of the second absorbent mesh plate (152), and the first absorbent mesh plate (142) is provided with a ball-shaped absorbent layer (143).

5. The extruder exhaust gas absorption and treatment device according to claim 2, characterized in that: It also includes an impurity cleaning unit (300) for cleaning floating objects on the surface of the spray water in the absorption tank (100).

6. The extruder exhaust gas absorption and treatment device according to claim 5, characterized in that: The impurity cleaning unit (300) includes a chain plate impurity cleaner (310) and a waste collection box (320). The chain plate impurity cleaner (310) extends into the absorption box (100). The chain plate impurity cleaner (310) is provided with a scraper (311). The impurity cleaning unit (300) is provided with multiple chain plates. The chain plates are provided with multiple water filtering holes. The scraper (311) is used to scrape the impurities on the chain plates into the waste collection box (320).

7. The extruder exhaust gas absorption and treatment device according to claim 6, characterized in that: The chain plate impurity cleaner (310) is installed at an angle on the absorption tank (100). The first end of the chain plate impurity cleaner (310) extends below the water surface of the absorption tank (100), and the second end of the chain plate impurity cleaner (310) is located outside the absorption tank (100). The waste collection tank (320) is located below the second end of the chain plate impurity cleaner (310).

8. The extruder exhaust gas absorption and treatment device according to claim 1, characterized in that: The upper part of the water vapor separation tower (500) is a demisting chamber, and the lower part of the water vapor separation tower (500) is a water vapor separation chamber. The demisting chamber is provided with an activated carbon absorption layer (520), and the water vapor separation chamber is provided with a multi-layer drawer-type mesh plate (510).

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