A setting machine exhaust gas self-cleaning filter device

Abstract

The utility model relates to industrial waste gas treatment technical field especially relates to a shaping machine waste gas self -cleaning filter device, including drive transmission assembly, micropore filter board, sealing assembly, high pressure purging assembly and dust extraction assembly. The micropore filter board is formed high density micropore array through microsecond laser processing, and the inner wall of micropore is smooth to reduce impurity adhesion. Multiple micropore filter boards are arranged staggeredly and are driven low -speed rotation by drive transmission assembly. Sealing assembly adopts wear -resisting material and is arranged between filter board and box. High pressure purging assembly is arranged at one side of filter board, and high pressure gas or steam is jetted through nozzle and carries out reverse cleaning to micropore, dust extraction assembly is located opposite side, is used for synchronous collection and falls off particle. The device prolongs the service life of micropore filter board to 5~8 years, reduces maintenance frequency, guarantees production continuity, and can stably control waste gas particulate matter concentration below 20mg / m3, has the advantages of high efficiency, durable and high automation degree.

Description

Technical Field

[0001] This utility model relates to the field of industrial waste gas treatment technology, and in particular to a self-cleaning filter device for waste gas from a stenter. Background Technology

[0002] The textile printing and dyeing industry generates a large amount of high-temperature exhaust gas containing cotton lint, oil mist, and volatile organic compounds during the operation of equipment such as stenters and dryers. In order to meet environmental emission requirements and protect subsequent exhaust gas treatment systems, pretreatment filtration is usually required before the exhaust gas enters the main treatment device to remove particulate matter and oil impurities.

[0003] Existing exhaust gas filtration devices mainly employ ordinary metal filters or electrostatic precipitators. Ordinary metal filters are prone to clogging due to the accumulation of grease, lint, and fibers over long-term use, leading to increased air resistance. This necessitates regular manual cleaning and replacement of the filters, which is not only labor-intensive but also severely impacts the stability of continuous production. While electrostatic precipitators can capture fine particles to some extent, their efficiency in removing large particles like lint is low, and they also suffer from high energy consumption and complex maintenance. Therefore, designing a self-cleaning filtration device for stenter exhaust gas is essential. Utility Model Content

[0004] The purpose of this invention is to provide a self-cleaning filter device for exhaust gas from a stenter to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a self-cleaning filter device for exhaust gas from a stenter, including a drive transmission assembly; The microporous filter plate is made of 304 or 316L stainless steel plate with a thickness of 0.5 to 2 mm, and is formed by laser processing to form a microporous array with a pore size of 50 to 200 μm and a pore density of 500 to 2000 pores / cm², wherein the roughness Ra of the inner wall of the micropores is not greater than 0.8 μm. A sealing assembly is disposed between the microporous filter plate and the device housing to maintain airtightness and reduce frictional loss during the rotation of the microporous filter plate. A high-pressure purging assembly is arranged on one side of the microporous filter plate and includes several nozzles for spraying high-pressure gas to backwash the micropores when a control signal is triggered. The dust collection component is arranged on the other side of the microporous filter plate and is opposite to the high-pressure blowing component across the microporous filter plate. It is used to simultaneously remove shed cotton fibers and grease particles.

[0006] According to the above technical solution, the drive transmission assembly includes a motor and a bevel gear-coupling transmission mechanism disposed outside the device. The motor drives the coupling to rotate through the bevel gear, so that the microporous filter plate rotates at a low speed of 1.5 rpm.

[0007] According to the above technical solution, the multiple microporous filter plates are arranged in an alternating manner along an inclined direction to increase the filtration area and improve the filtration efficiency.

[0008] According to the above technical solution, the material of the sealing component is polytetrafluoroethylene or other highly wear-resistant sealing materials.

[0009] According to the above technical solution, the dust collection assembly includes a cavity-shaped suction port, a guide rail movable dust collection arm, a vacuum pump, and a cyclone separation dust collection box. The dust collection arm moves laterally along the guide rail, and its vacuum nozzle maintains a distance of 3 to 10 mm from the surface of the microporous filter plate, and works under negative pressure conditions of -5 kPa to -10 kPa.

[0010] Compared with existing technologies, the beneficial effects achieved by this invention are as follows: This invention, by incorporating a stainless steel microporous filter plate with microporous laser processing, effectively reduces the adhesion rate of grease and lint, and significantly extends the service life of the filter plate; the drive transmission component rotates the microporous filter plate at low speed, continuously agitating the exhaust gas flow field, preventing localized deposition and blockage, and ensuring long-term stable filtration; the reasonable arrangement of the sealing component between the filter plate and the housing ensures airtightness and reduces frictional loss, thereby improving the operational reliability of the device; the coordinated operation of the high-pressure blowing component and the dust collection component achieves online backflushing and synchronous dust collection, avoiding downtime for disassembly and maintenance, and significantly improving production continuity and automation; simultaneously, detached impurities are collected by cyclone separation, ensuring the cleanliness of the treated exhaust gas. In summary, this invention not only significantly improves filtration efficiency and service life, but also stably controls the particulate matter concentration in exhaust gas to below 20 mg / m³, possessing the advantages of high efficiency, durability, and self-cleaning. Attached Figure Description

[0011] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of a self-cleaning filter device for exhaust gas from a stenter proposed in this utility model; Figure 2 This is a schematic diagram of the overall structure of a self-cleaning filter device for exhaust gas from a stenter proposed in this utility model.

[0012] In the diagram: 1 Drive transmission assembly, 2 Microporous filter plate, 3 Sealing assembly, 4 High-pressure blowing assembly, 5 Dust collection assembly. Detailed Implementation

[0013] 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.

[0014] Example: Reference Figure 1-2 A self-cleaning filtration device for stenter exhaust gas includes a drive transmission assembly 1, a microporous filter plate 2, a sealing assembly 3, a high-pressure blowing assembly 4, and a dust collection assembly 5. The microporous filter plate 2 is made of 304 / 316L stainless steel with a thickness of 0.5–2 mm, and is formed into a microporous array with a pore size of 50–200 μm and a pore density of 500–2000 pores / cm² through microsecond-level pulsed laser processing. The inner wall of the micropores melts and cools during laser processing, forming a smooth surface with a roughness Ra not exceeding 0.8 μm, thereby effectively reducing the adhesion rate of putty and lint. Multiple microporous filter plates 2 are arranged in an inclined, staggered manner to increase the filtration area and improve filtration efficiency.

[0015] The drive transmission assembly 1 includes a motor and a bevel gear-coupling transmission mechanism disposed outside the device. The motor output drives the coupling to rotate via the bevel gear, thereby driving the microporous filter plate 2 to rotate at a low speed of 1.5 rpm, realizing dynamic disturbance of the exhaust gas flow field and preventing local deposition and blockage. The drive transmission assembly 1 is arranged outside the device, which facilitates maintenance and replacement and reduces the impact of high-temperature environment on the motor life.

[0016] The sealing assembly 3 is disposed between the microporous filter plate 2 and the device housing, and is made of polytetrafluoroethylene or other highly wear-resistant sealing materials. This sealing assembly 3 not only ensures that exhaust gas does not leak during rotation, but also significantly reduces frictional wear between the microporous filter plate 2 and the housing, thereby improving the long-term stability of the system.

[0017] The high-pressure purging assembly 4 is arranged on one side of the microporous filter plate 2. It includes several nozzles. When blockage of the filter pores is detected, high-pressure steam or high-speed air is sprayed through the nozzles to backwash the micropores, causing the cotton fibers and oil particles attached to the pores to fall off. The spray angle and flow rate are adjusted by a control valve to ensure the uniformity and efficiency of the cleaning.

[0018] The dust collection assembly 5 is located on the other side of the microporous filter plate 2, and is positioned opposite the high-pressure blowing assembly 4 across the microporous filter plate 3. The dust collection assembly 5 includes a cavity-shaped suction port, a guide rail-mounted movable dust collection arm, a vacuum pump, and a cyclone separation dust collection box. The dust collection arm moves laterally along the guide rail, with its vacuum nozzle maintaining a distance of 3-10 mm from the surface of the microporous filter plate 2, and operates under a negative pressure condition of -5 kPa to -10 kPa. Loose cotton fibers and grease particles are sucked in through the suction port, separated by a cyclone, and settled into the dust collection box, while clean air is returned to the exhaust gas duct.

[0019] During system operation, exhaust gas first enters the device and undergoes efficient filtration through the microporous filter plate 2, trapping lint and grease. As operating time increases, a pressure difference is generated across the microporous filter plate 2. When the pressure difference sensor detects a value exceeding a set threshold (e.g., 150 Pa), the PLC automatically triggers the high-pressure blowing assembly 4 and the dust collection assembly 5 to work together. The blowing assembly 4 flushes out impurities from the micropores, while the dust collection assembly 5 promptly sucks in and collects the impurities, achieving online automatic cleaning.

[0020] During long-term operation, the microporous filter plate 2 has a service life of 5 to 8 years, which is much longer than that of traditional metal filters (≤6 months). At the same time, the automatic cleaning method avoids downtime for disassembly, greatly improving production continuity and waste gas treatment efficiency, and the concentration of particulate matter in the waste gas can be stably controlled below 20mg / m³.

[0021] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0022] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A self-cleaning filter device for exhaust gas from a stenter, characterized in that, include: Drive transmission components (1); Microporous filter plate (2), the microporous filter plate (2) is made of 304 or 316L stainless steel plate with a thickness of 0.5 to 2 mm, and is formed by laser processing to form a microporous array with a pore size of 50 to 200 μm and a pore density of 500 to 2000 pores / cm², wherein the inner wall roughness Ra of the micropores is not greater than 0.8 μm; A sealing component (3) is disposed between the microporous filter plate (2) and the device housing to maintain airtightness and reduce frictional loss during the rotation of the microporous filter plate. The high-pressure purging assembly (4) is arranged on one side of the microporous filter plate (2) and includes several nozzles for spraying high-pressure gas to backwash the micropores when the control signal is triggered. The dust collection component (5) is arranged on the other side of the microporous filter plate (2) and is positioned opposite to the high-pressure blowing component (4) across the microporous filter plate (2) to simultaneously remove shed cotton lint and grease particles.

2. The self-cleaning filter device for stenter exhaust gas according to claim 1, characterized in that, The drive transmission assembly (1) includes a motor and a bevel gear-coupling transmission mechanism located outside the device. The motor drives the coupling to rotate through the bevel gear, so that the microporous filter plate (2) rotates at a low speed of 1.5 rpm.

3. The self-cleaning filter device for stenter exhaust gas according to claim 1, characterized in that, The multiple microporous filter plates (2) are arranged in an alternating manner along an inclined direction to increase the filtration area and improve the filtration efficiency.

4. The self-cleaning filter device for stenter exhaust gas according to claim 1, characterized in that, The sealing component (3) is made of polytetrafluoroethylene or other high wear-resistant sealing materials.

5. The self-cleaning filter device for stenter exhaust gas according to claim 1, characterized in that, The dust collection assembly (5) includes a cavity-shaped suction port, a guide rail movable dust collection arm, a vacuum pump and a cyclone separation dust collection box. The dust collection arm moves laterally along the guide rail, and its vacuum nozzle maintains a distance of 3 to 10 mm from the surface of the microporous filter plate (2), and works under negative pressure conditions of -5 kPa to -10 kPa.

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