Tail gas treatment device

Abstract

The utility model relates to a tail gas treatment device, which belongs to the technical field of tail gas treatment and comprises a first-stage filter, a second-stage filter, an electrostatic purifier, a third-stage filter and an induced draft fan which are sequentially connected through pipelines. The primary filter adopts a coarse filter screen to filter fiber powder; the secondary filter adopts a dry type filtering mode and is used for filtering solid particles and impurities in the tail gas; the electrostatic purifier realizes dust removal and oil removal by generating a higher electrostatic field; the third-stage filter adopts activated carbon filtration and is used for treating fine particles and peculiar smell which are not treated by the electrostatic purifier; the induced draft fan is used for driving tail gas to flow, so that the tail gas sequentially passes through the first-stage filter, the second-stage filter, the electrostatic purifier and the third-stage filter; according to the tail gas treatment device disclosed by the utility model, the service life of the whole tail gas treatment device is prolonged by automatically switching the coarse filter screen, and the tail gas treatment efficiency is improved.

Description

Technical Field

[0001] This utility model relates to an exhaust gas treatment device, belonging to the field of exhaust gas treatment technology. Background Technology

[0002] During the production of chemical fibers, the waste gas produced contains smoke, dust, VOCs (hydrocarbons such as benzene, toluene, and ethylbenzene) and malodor. The pollution intensity of the waste gas is high, the emission volume is large, and the pollutant composition is complex and variable. In particular, the malodorous components in the waste gas can easily cause significant pollution to the atmospheric environment and the factory area environment.

[0003] Chinese utility model patent CN213853772U discloses a waste gas treatment device for the production of chemical fiber ropes and nets. The device includes multiple gas collection hoods, each connected sequentially to a condenser, an activated carbon treatment box, a UV photocatalytic oxidation waste gas treatment device, a spray tower, a centrifugal fan, and a chimney via an airflow regulating valve and an exhaust fan. The spray tower contains multiple layers of packing material, with multiple rotating nozzles mounted on spray pipes above each layer. A drain outlet is located at the bottom of the spray tower and connects to a circulating water tank. The circulating water tank is connected to the spray pipes via a water pump and a water supply pipe. An airflow distributor and a demister are located at the top of the spray tower. This utility model, through the integrated use of the activated carbon treatment box, the UV photocatalytic oxidation waste gas treatment device, and the spray tower, can effectively absorb and treat the waste gas generated during the production of chemical fiber ropes and nets, achieving emission standards and avoiding harm to human health and environmental pollution. However, in existing technologies, the photocatalytic oxidation process has a short lifespan, requiring manual replacement during shutdown, resulting in low treatment efficiency.

[0004] Therefore, there is a need for an exhaust gas treatment device to improve treatment efficiency. Summary of the Invention

[0005] The technical problem to be solved by this utility model is to provide an exhaust gas treatment device that improves treatment efficiency in order to overcome the shortcomings of the prior art.

[0006] The technical solution adopted by this utility model to solve the above problems is: an exhaust gas treatment device, comprising a primary filter, a secondary filter, an electrostatic purifier, a tertiary filter and an induced draft fan connected in sequence through pipelines;

[0007] The primary filter uses a coarse filter screen to filter fiber powder.

[0008] The secondary filter is a dry filter used to filter solid particles and impurities in the exhaust gas.

[0009] The electrostatic purifier achieves dust and oil removal by generating a field higher than the electrostatic field.

[0010] The three-stage filter is an activated carbon filter, used to remove fine particles and odors that the electrostatic purifier could not remove.

[0011] The exhaust fan is used to drive the exhaust gas flow, so that the exhaust gas passes through a primary filter, a secondary filter, an electrostatic purifier and a tertiary filter in sequence.

[0012] The primary filter includes a housing, with an air inlet and an air outlet on the left and right sides of the housing, respectively, and a filtration mechanism is installed inside the housing.

[0013] The filtration mechanism includes a rotating disk, two sealing plates, and multiple filter components. The two sealing plates are spaced apart on the left and right sides. The sealing plates are sealed and fixedly connected to the inner wall of the housing. The axis of the rotating disk is parallel to the left and right direction. The rotating disk is located between the two sealing plates and is sealed and fitted with the two sealing plates. The sealing plates are provided with through holes, which are eccentrically arranged with respect to the rotating disk. The rotating disk is driven to rotate by a drive component. The multiple filter components are circumferentially distributed on the rotating disk with the axis of the rotating disk as the center.

[0014] The filter assembly includes filter holes, a coarse filter screen is disposed in the filter holes, a through groove is disposed on the side of the filter holes away from the axis of the rotating disk, the through groove extends to the outer peripheral wall of the rotating disk, and a locking unit is disposed in the through groove, the locking unit is used to clamp and fix the coarse filter screen.

[0015] Preferably, the drive assembly includes a drive wheel, a driven wheel, and a drive shaft. The drive shaft is coaxially arranged with the rotating disk and passes through one of the sealing plates. One end of the drive shaft is fixedly mounted on the rotating disk, and the driven wheel is mounted on the other end of the drive shaft. The drive wheel is driven by a motor, and the drive wheel and the driven wheel are connected by a transmission belt.

[0016] Preferably, the locking unit includes a locking block that abuts against the coarse filter screen, the locking block is detachably and fixedly connected to the rotating disk, and the locking block is sealed and fitted against the inner wall of the through groove.

[0017] Preferably, the locking block has protrusions on both sides, and the protrusions are locked to the rotating disk by locking screws.

[0018] Preferably, the coarse filter screen includes an mounting ring and a filter screen body. The filter screen body is disposed in the annular hole of the mounting ring, the outer peripheral wall of the mounting ring is sealed and fitted with the inner wall of the filter hole, and the locking block is sealed and fitted with the outer peripheral wall of the mounting ring.

[0019] Preferably, the top of the housing is provided with an access port, which is located between two sealing plates.

[0020] Preferably, the inspection port is equipped with a sealing cover.

[0021] Preferably, a condenser pipe is connected to the induced draft fan.

[0022] Preferably, the number of filter components is four.

[0023] Preferably, in each filter hole, there is one and only one filter hole that is simultaneously connected to two through holes.

[0024] Compared with the prior art, the advantages of this utility model are:

[0025] This utility model discloses an exhaust gas treatment device that extends the overall service life of the device and improves exhaust gas treatment efficiency by automatically switching coarse filters. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of an exhaust gas treatment device according to the present invention;

[0027] Figure 2 This is a 3D view of the primary filter;

[0028] Figure 3 This is a cross-sectional view of the primary filter;

[0029] Figure 4 This is a schematic diagram of the casing structure;

[0030] Figure 5 This is a schematic diagram of the sealing plate structure;

[0031] Figure 6 This is a schematic diagram of the connection structure between the rotating disk and the filter assembly;

[0032] Figure 7 for Figure 6 A sectional view;

[0033] Figure 8 for Figure 7 Enlarged view of part A;

[0034] Figure 9 This is a schematic diagram of the rotating disk.

[0035] Figure 10 This is a schematic diagram of the drive component.

[0036] Figure 11 This is a schematic diagram of the structure of a coarse filter screen.

[0037] in:

[0038] Primary filter 100, secondary filter 200, electrostatic purifier 300, tertiary filter 400, exhaust fan 500;

[0039] 1. Housing; 2. Air inlet; 3. Air outlet; 4. Filter mechanism; 5. Inspection port; 6. Sealing cover.

[0040] Rotating disk 41, sealing plate 42, filter assembly 43, through hole 44, drive assembly 45;

[0041] Filter holes 431, coarse filter screen 432, through groove 433, locking unit 434;

[0042] Mounting ring 4321, filter body 4322;

[0043] Locking block 4341, protrusion 4342, locking screw 4343;

[0044] Drive wheel 451, driven wheel 452, drive shaft 453, motor 454, transmission belt 455. Detailed Implementation

[0045] like Figure 1-11 As shown, an exhaust gas treatment device in this embodiment includes a primary filter 100, a secondary filter 200, an electrostatic purifier 300, a tertiary filter 400, and an induced draft fan 500 connected in sequence through pipelines.

[0046] The primary filter 100 uses a coarse filter screen 432. Since the exhaust gas generated during the production of chemical fibers contains some fiber powder, the fiber powder is filtered by the coarse filter screen 432. The coarse filter screen 432 is installed in the housing 1 of the primary filter 100, and multiple coarse filter screens 432 are provided. During normal operation, only one coarse filter screen 432 performs the filtration action. When the coarse filter screen 432 reaches the end of its service life, another coarse filter screen 432 is switched to perform the filtration action to improve the processing efficiency.

[0047] The primary filter 100 includes a housing 1, with an air inlet 2 and an air outlet 3 respectively provided on the left and right sides of the housing 1, and a filter mechanism 4 provided inside the housing 1.

[0048] The filtration mechanism 4 includes a rotating disk 41, two sealing plates 42, and multiple filter components 43. The two sealing plates 42 are spaced apart on the left and right sides. The sealing plates 42 are sealed and fixedly connected to the inner wall of the housing 1. The axis of the rotating disk 41 is parallel to the left and right direction. The rotating disk 41 is located between the two sealing plates 42 and is sealed and fitted with the two sealing plates 42. The sealing plates 42 are provided with through holes 44. The through holes 44 are eccentrically arranged with respect to the rotating disk 41. The rotating disk 41 is driven to rotate by a drive component 45. The multiple filter components 43 are evenly distributed circumferentially on the rotating disk 41 with the axis of the rotating disk 41 as the center. The specific number of filter components 43 is four.

[0049] The filter assembly 43 includes a filter hole 431, a coarse filter screen 432 is disposed in the filter hole 431, a through groove 433 is disposed on the side of the filter hole 431 away from the axis of the rotating disk 41, the through groove 433 extends to the outer peripheral wall of the rotating disk 41, and a locking unit 434 is disposed in the through groove 433, the locking unit 434 is used to clamp and fix the coarse filter screen 432.

[0050] During operation, exhaust gas is delivered from the air inlet 2 into the housing 1, and then from the through hole 44 on the left sealing plate 42 into one of the filter holes 431. After the fiber powder in the exhaust gas is filtered by the coarse filter screen 432, it is discharged from the through hole 44 on the right sealing plate 42 and finally discharged from the exhaust hole 3. There is only one filter hole 431 that is connected to both through holes 44 at the same time, while the other filter holes 431 are sealed by the two sealing plates 42.

[0051] When the coarse filter 432 that performs the filtration action reaches the end of its service life, the drive component 45 drives the rotating disk 41 to rotate at a set angle, so that another filter hole 431 is connected to two through holes 44 at the same time, and the other filter holes 431 are sealed by two sealing plates 42. In this way, the coarse filter 432 is automatically switched, which allows the exhaust gas treatment device to continue to filter the exhaust gas, extending the overall service life of the exhaust gas treatment device and improving the exhaust gas treatment efficiency.

[0052] The drive assembly 45 includes a drive wheel 451, a driven wheel 452, and a drive shaft 453. The drive shaft 453 is coaxially arranged with the rotating disk 41. The drive shaft 453 passes through one of the sealing plates 42. One end of the drive shaft 453 is fixedly mounted on the rotating disk 41. The driven wheel 452 is mounted on the other end of the drive shaft 453. The drive wheel 451 is driven by a motor 454. The drive wheel 451 and the driven wheel 452 are connected by a transmission belt 455. When the motor 454 starts, it causes the drive wheel 451 to rotate, which in turn drives the driven wheel 452 to rotate via the transmission belt 455. The rotation of the driven wheel 452 drives the rotating disk 41 to rotate by a set angle via the drive shaft 453.

[0053] The locking unit 434 includes a locking block 4341, which abuts against the coarse filter screen 432. The locking block 4341 is detachably and fixedly connected to the rotating disk 41. The locking block 4341 is sealed and fitted to the inner wall of the through groove 433.

[0054] Both sides of the locking block 4341 are provided with protrusions 4342, and the protrusions 4342 are locked to the rotating disk 41 by locking screws 4343;

[0055] The coarse filter screen 432 includes a mounting ring 4321 and a filter screen body 4322. The filter screen body 4322 is disposed in the annular hole of the mounting ring 4321. The outer peripheral wall of the mounting ring 4321 is sealed and fitted with the inner wall of the filter hole 431. The locking block 4341 is sealed and fitted with the outer peripheral wall of the mounting ring 4321.

[0056] The top of the housing 1 is provided with an inspection port 5, which is located between two sealing plates 42. The inspection port 5 is covered with a sealing cover 6. When it is necessary to replace the coarse filter 432 that has reached the end of its service life, rotate the coarse filter 432 to face the inspection port 5, open the sealing cover 6, loosen the locking screw 4343, remove the locking block 4341 from the through groove 433, and then remove the coarse filter 432 from the filter hole 431 to replace it with a new coarse filter 432.

[0057] The secondary filter 200 is a dry filter with multiple filter elements, used to filter solid particles and impurities in the exhaust gas.

[0058] The electrostatic purifier 300 removes dust and oil by generating a field higher than the electrostatic field, that is, it treats oily suspended particles in the workshop.

[0059] The three-stage filter 400 is an activated carbon filter, used to remove fine particles and odors that the electrostatic purifier 300 has not yet cleaned.

[0060] The exhaust fan 500 is used to drive the flow of exhaust gas, so that the exhaust gas passes through the primary filter 100, the secondary filter 200, the electrostatic purifier 300 and the tertiary filter 400 in sequence. The exhaust fan 500 can also be connected to a condenser pipe, which condenses the water vapor in the exhaust gas into liquid water and discharges it.

[0061] In summary, the automatic switching of the coarse filter 432 extends the overall service life of the exhaust gas treatment device and improves the exhaust gas treatment efficiency.

[0062] In addition to the above embodiments, this utility model also includes other implementation methods. All technical solutions formed by equivalent transformation or equivalent substitution should fall within the protection scope of the claims of this utility model.

Claims

1. An exhaust gas treatment device, characterized by: The filter device comprises a first filter (100), a second filter (200), an electrostatic purifier (300), a third filter (400) and an air blower (500) connected in sequence by pipelines. The first filter (100) uses a coarse filter screen (432) to filter fiber powder. The second filter (200) is a dry filter used to filter solid particles and impurities in the tail gas. The electrostatic purifier (300) generates a high static field to remove dust and oil. The third filter (400) is an activated carbon filter used to treat fine particles and peculiar smell that are not treated by the electrostatic purifier (300). The air blower (500) is used to drive the flow of the tail gas so that the tail gas passes through the first filter (100), the second filter (200), the electrostatic purifier (300) and the third filter (400) in sequence. The first filter (100) comprises a casing (1), air inlet holes (2) and air outlet holes (3) arranged on the left and right sides of the casing (1), and a filtering mechanism (4) arranged in the casing (1). The filtering mechanism (4) comprises a rotating disc (41), two sealing plates (42) and a plurality of filtering assemblies (43). The two sealing plates (42) are arranged at intervals on the left and right sides, and are sealingly and fixedly connected to the inner wall of the casing (1). The axis of the rotating disc (41) is parallel to the left and right directions, and the rotating disc (41) is located between the two sealing plates (42) and sealingly attached to the two sealing plates (42). The sealing plates (42) are provided with through holes (44), and the through holes (44) are arranged eccentrically with the rotating disc (41). The rotating disc (41) is driven to rotate by a driving assembly (45), and the plurality of filtering assemblies (43) are distributed in a circumferential direction on the rotating disc (41) with the axis of the rotating disc (41) as the center. The filtering assembly (43) comprises a filter hole (431) provided with a coarse filter screen (432), and a through slot (433) arranged on the side of the filter hole (431) away from the axis of the rotating disc (41) and extending to the outer peripheral wall of the rotating disc (41). A locking unit (434) is arranged in the through slot (433) to clamp and fix the coarse filter screen (432).

2. The exhaust treatment device of claim 1, wherein: The driving assembly (45) comprises a driving wheel (451), a driven wheel (452) and a driving shaft (453). The driving shaft (453) is coaxially arranged with the rotating disc (41), and penetrates through one of the sealing plates (42). One end of the driving shaft (453) is fixedly arranged on the rotating disc (41), and the driven wheel (452) is mounted on the other end of the driving shaft (453). The driving wheel (451) is driven by a motor (454), and the driving wheel (451) and the driven wheel (452) are connected by a transmission belt (455).

3. The exhaust treatment device of claim 1, wherein: The locking unit (434) comprises a locking block (4341) abutting against the coarse-effect filter screen (432), the locking block (4341) is detachably fixedly connected with the rotating disc (41), and the locking block (4341) is sealingly attached to the inner wall of the through groove (433).

4. The exhaust treatment device of claim 3, wherein: The locking block (4341) is provided with a protrusion (4342) on each side, and the protrusion (4342) is locked with the rotating disc (41) by a locking screw (4343).

5. The exhaust treatment device of claim 3, wherein: The coarse-effect filter screen (432) comprises a mounting ring (4321) and a filter screen body (4322), the filter screen body (4322) is arranged in the ring hole of the mounting ring (4321), the outer peripheral wall of the mounting ring (4321) is sealingly attached to the inner wall of the filter hole (431), and the locking block (4341) is sealingly attached to the outer periphery of the mounting ring (4321).

6. The exhaust treatment device of claim 1, wherein: The top of the casing (1) is provided with an access hole (5), and the access hole (5) is located between the two sealing plates (42).

7. A tail gas treatment apparatus according to claim 6, characterized in that: A sealing cover (6) is arranged on the access hole (5).

8. The exhaust treatment device of claim 1, wherein: The induced draft fan (500) is connected with a condensing pipe.

9. The exhaust treatment device of claim 1, wherein: The number of the filter assemblies (43) is four.

10. The exhaust treatment device of claim 1, wherein: In each filter hole (431), only one filter hole (431) is in communication with the two through holes (44).

Images