Waste gas filtering part and waste gas treatment device

Abstract

The utility model discloses a waste gas filtering component and a waste gas treatment device. The waste gas filtering component comprises a rectangular frame and a filter element, the rectangular frame is provided with a mounting groove; the filter element is in a plate shape and is fixed in the mounting groove of the rectangular frame; the filter element comprises a first filter layer, a second filter layer and a third filter layer which are sequentially arranged in the waste gas passing direction. The first filter layer is a glass fiber filter element, and the second filter layer is a Lyocell fiber filter element. According to the utility model, the filter element is mainly responsible for capturing and filtering particulate matters and pollutants in waste gas, and the filter element realizes the removal of submicron aerosol.

Description

Technical Field

[0001] The utility model relates to the technical field of waste gas treatment equipment, in particular to a waste gas filtering component and a waste gas treatment device. Background Art

[0002] The textile industry is a traditional and important sector in my country. China is currently one of the world's largest manufacturers and exporters of textiles and apparel. Textile shaping machines generate large amounts of waste gas during production and processing, which is highly polluting. Harmful substances in this waste gas are a significant source of PM2.5 and photochemical smog, seriously impacting air quality.

[0003] Chinese utility model patent publication number CN214345284U discloses an exhaust gas treatment device for a sizing machine, comprising: a spray chamber, a cyclone separator, a filter chamber, a cooler, a water filter, a fan, a heater, an adsorption device, and an exhaust gas discharge structure, all connected in sequence. The exhaust gas inlet is located at the bottom of the spray chamber, and the exhaust gas outlet is located at the top of the spray chamber. Several spray heads are located above the spray chamber, and the exhaust gas passes through the spray heads from bottom to top. The filter chamber inlet is located at the bottom of the filter chamber, and the filter chamber outlet is located at the top of the filter chamber. Several vertically arranged filter cores are located within the filter chamber. Each filter core is hollow, and several filter layers are wound sequentially around the sidewalls of the filter core from the inside out. An outlet is located at the top of the filter core, and the exhaust gas passes through the filter layers from the outside inward and is discharged upward from the outlet. A fire sprinkler system is located above the filter chamber.

[0004] Currently, fiberglass is the primary filter layer used for waste gas treatment in the textile industry. However, the exhaust gas emitted during the production and processing of setting machines is complex, primarily containing aldehydes, ketones, hydrocarbons, esters, and aromatic compounds. These gases are primarily derived from: organic matter in the fibers or fabrics themselves; fiber lint, solid particulate matter, and combustible dust on the fabrics; and various dyes and chemicals added to the fabrics during dyeing and finishing. Due to the high circulating air volumes and temperatures of setting machines, these substances evaporate and become airborne in various forms, ultimately being discharged through the exhaust pipe. Using a single fiberglass filter layer is no longer sufficient to meet the current waste gas treatment needs of the textile industry. Utility Model Content

[0005] In order to overcome the above technical defects, the utility model provides an exhaust gas filtering component and an exhaust gas treatment device.

[0006] In order to solve the above problems, the present invention is implemented according to the following technical solutions:

[0007] In a first aspect, the present invention provides an exhaust gas filter component for use in an exhaust gas treatment device, the exhaust gas filter component comprising:

[0008] A rectangular frame having a mounting groove;

[0009] A filter core, the filter core is plate-shaped and is fixed in the mounting groove of the rectangular frame;

[0010] Wherein, the filter core comprises a first filter layer, a second filter layer and a third filter layer which are sequentially arranged along the direction of exhaust gas passing;

[0011] The first filter layer is a glass fiber filter element, and the second filter layer is a Lyocell fiber filter element.

[0012] In a preferred implementation of the first aspect, the Lyocell fiber filter element uses fibrillated Lyocell fibers.

[0013] In a preferred implementation of the first aspect, the third filter layer is composited by multiple layers of polyester non-woven fabric.

[0014] In a preferred implementation of the first aspect, the rectangular frame includes:

[0015] A frame body, the frame body being a hollow rectangular frame structure and having a mounting groove;

[0016] A pressing piece, which is a hollow rectangular plate adapted to the mounting groove of the frame body, and is connected to the frame body by bolts;

[0017] Wherein, the filter core is placed in the installation groove of the frame body and is pressed and fixed by the pressing piece.

[0018] In a preferred implementation of the first aspect, a surface of the pressing member in contact with the filter core is connected to a limiting rubber sheet, and the limiting rubber sheet is in close contact with the filter core.

[0019] In a preferred implementation of the first aspect, the frame body is provided with a mounting portion, and the mounting portion is used for hoisting in the exhaust gas treatment device.

[0020] In a second aspect, the present invention further provides an exhaust gas treatment device, which includes the exhaust gas filter component described in the first aspect.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] The utility model provides an exhaust gas filter component for use in an exhaust gas treatment device. In a specific embodiment, the exhaust gas treatment device is used to treat exhaust gas from a setting machine in the textile industry. The exhaust gas filter component includes a rectangular frame and a filter element. The rectangular frame has a mounting slot; the filter element is plate-shaped and fixed in the mounting slot of the rectangular frame; the filter element includes a first filter layer, a second filter layer, and a third filter layer arranged in sequence along the direction of exhaust gas flow; the first filter layer is a glass fiber filter element, and the second filter layer is a Lyocell fiber filter element.

[0023] In this utility model, the rectangular frame has a mounting groove for fixing the filter element. The rectangular frame provides support and fixes the position of the filter element. This design also facilitates the removal and replacement of the exhaust gas filter component from the exhaust gas treatment device.

[0024] In this utility model, the filter element is primarily responsible for capturing and filtering particulate matter and pollutants from the exhaust gas. The first filter layer utilizes a glass fiber filter element, a material that typically has high filtration efficiency and effectively captures fine particulate matter and pollutants. The second filter layer utilizes a Lyocell fiber filter element. This composite filter material synergistically improves the filtration efficiency and performance of the exhaust gas treatment device, significantly increasing the likelihood of intercepting small particles sized between 0.1-1μm and particles larger than 1-10μm due to inertial impact.

[0025] The filter element of the utility model can remove submicron-level aerosols. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, wherein:

[0027] Figure 1 This is a three-dimensional schematic diagram of an exhaust gas filter component of the present utility model;

[0028] Figure 2 This is a schematic diagram of the assembly of an exhaust gas filter component of the utility model;

[0029] Figure 3 This is a structural diagram of a fiber filtration type exhaust gas treatment device of the present utility model;

[0030] In the picture:

[0031] 10-rectangular frame, 11-rectangular body, 12-pressed piece;

[0032] 20-Filter element. DETAILED DESCRIPTION

[0033] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention and are not used to limit the present invention.

[0034] like Figures 1 to 3 As shown, this is a preferred structure of an exhaust gas filter component described in the present invention.

[0035] like Figure 1 The figure shows an exhaust gas filter component for use in an exhaust gas treatment device. Specifically, the exhaust gas treatment device is used to treat exhaust gas from a stentering machine in the textile industry. The exhaust gas filter component comprises a rectangular frame and a filter element. The rectangular frame has a mounting slot; the plate-shaped filter element is fixed in the mounting slot of the rectangular frame. The filter element comprises a first filter layer, a second filter layer, and a third filter layer, arranged in sequence along the direction of exhaust gas flow. The first filter layer is a glass fiber filter element, and the second filter layer is a Lyocell fiber filter element.

[0036] In this utility model, the rectangular frame has a mounting groove for fixing the filter element. The rectangular frame provides support and fixes the position of the filter element. This design also facilitates the removal and replacement of the exhaust gas filter component from the exhaust gas treatment device.

[0037] In this utility model, the filter element is primarily responsible for capturing and filtering particulate matter and pollutants from the exhaust gas. The first filter layer utilizes a glass fiber filter element, a material that typically has high filtration efficiency and effectively captures fine particulate matter and pollutants. The second filter layer utilizes a Lyocell fiber filter element. This composite filter material synergistically improves the filtration efficiency and performance of the exhaust gas treatment device, significantly increasing the likelihood of intercepting small particles sized between 0.1-1μm and particles larger than 1-10μm due to inertial impact.

[0038] The filter element of the utility model can remove submicron-level aerosols.

[0039] In a specific implementation, the first filter layer is made of multiple layers of fiber cloth, which are tightly overlapped. The outermost layer is the dirtiest and easy to drop pollutants, while the inner layer controls the filtering effect.

[0040] Among them, the principle of the first filter layer is to use the special structure and form of glass fiber to arrange the fine-diameter fibers into a certain mesh structure. At the same time, it uses the gaps and charges between the fibers to adsorb various particles and other harmful substances in the air into the fiber mesh, thereby achieving air filtration and purification.

[0041] In a specific implementation, the thickness of the first filter layer can be determined according to the design. For unified exhaust gas treatment of multiple setting machines, the thickness needs to be increased accordingly.

[0042] In one embodiment, the second filter layer is a Lyocell fiber filter element, which is constructed from multiple layers of tightly stacked fiber cloth (non-woven fabric). In a preferred embodiment, the Lyocell fiber filter element utilizes fibrillated Lyocell fibers. Compared to conventional air filter materials, fibrillated fiber air filter materials offer advantages such as environmental friendliness, low cost, short production cycles, and ease of industrial application.

[0043] Specifically, the Lyocell fiber filter element uses Lyocell fibers with a diameter of 15μm and a length of 10mm. The second filter layer made of Lyocell fibers has excellent moisture absorption and air permeability, which can help further purify the exhaust gas and absorb moisture from the exhaust gas.

[0044] In a specific implementation, the third filter layer is formed by composite multi-layer polyester non-woven fabrics.

[0045] In a specific implementation, polyester non-woven fabric is made of polyester fibers with a diameter of 10 μm and a length of 5 mm. The reason for using polyester non-woven fabric is, on the one hand, to enhance the filtering performance, and on the other hand, to enhance the mechanical properties of the filter element.

[0046] like Figure 2 As shown, the rectangular frame includes:

[0047] A frame body, the frame body being a hollow rectangular frame structure and having a mounting groove;

[0048] A pressing piece, which is a hollow rectangular plate adapted to the mounting groove of the frame body, and is connected to the frame body by bolts;

[0049] Wherein, the filter core is placed in the installation groove of the frame body and is pressed and fixed by the pressing piece.

[0050] In a preferred embodiment, a surface of the pressing member in contact with the filter core is connected to a limiting rubber sheet, and the limiting rubber sheet is in close contact with the filter core.

[0051] In a preferred embodiment, the frame body is provided with a mounting portion, and the mounting portion is used for hoisting in the exhaust gas treatment device.

[0052] In a specific implementation, the frame body and the pressing piece are both made of high-strength plastic, which has the advantages of corrosion resistance and long service life.

[0053] The utility model also provides a waste gas treatment device, which is used for treating waste gas from a setting machine in the textile industry.

[0054] The smoke or blue smoke emitted from the exhaust outlet of the setting machine is mainly composed of liquid and solid particles in the submicron range. Fiber filtration is an effective method to effectively remove liquid aerosols or mist liquids in the exhaust gas.

[0055] like Figure 3 As shown, the overall process flow of the exhaust gas treatment device is as follows: exhaust gas from the shaping machine → spray washing → cyclone separation → primary filtration → fiber filtration → condensation → induced draft discharge.

[0056] The pretreatment section consists of spray washing, cyclone separation, pre-filtration, water circulation, additive addition, and pre-filter backwashing. Under the operation of the circulation pump, the exhaust gas from the setting machine is first washed by water spray, so that the hairiness, large particles, and large oil stains are first cleaned and settled.

[0057] Cyclone separation is the rotation of exhaust gas in the rotating guide plate during its flow. Large solid and liquid particles are separated due to centrifugal force, and the turbulence of air is also used to fully contact and cool the air with water.

[0058] The pre-filter is composed of denser stainless steel mesh layers. On the one hand, it preliminarily filters the exhaust gas with water vapor, reduces the pollutants flowing into the fiber filter section, and extends the life and maintenance cycle of the fiber filter; on the other hand, it prevents sparks that may cause fire in the setting machine from entering the fiber filter section.

[0059] The pretreatment section not only removes most of the pollutants and water droplets, but also fully reduces the temperature of the exhaust gas (to ensure the stable operation of the fiber filtration section, the pretreatment section needs to reduce the temperature of the exhaust gas to below 50°C), reducing the pressure drop in the fiber filtration stage and extending the life of the fiber filter and maintenance cycle.

[0060] The core of the entire system is the fiber filter, which removes submicron aerosols. The power consumption of the induced draft fan is the primary operating cost of the entire system. The filter's flow area and flow velocity determine the pressure drop throughout the fiber filtration stage. To ensure effectiveness without causing a significant pressure drop, the optimal flow velocity is 5-10 m / min. The filter's flow area is calculated based on the inner surface area of the filter element.

[0061] The exhaust gas treated by the purification device has a low humidity level, but due to the temperature difference between the ambient temperature and the ambient temperature, a steam tail or water vapor plume often appears at the chimney outlet, giving the visual and sensory illusion of incomplete treatment. Currently, the solution to this problem is to add a steam heating function before the exhaust outlet. This allows the exhaust gas to be discharged at a temperature significantly higher than the ambient temperature, preventing re-condensation near the outlet and the aforementioned phenomenon.

[0062] Exhaust gases from the setting machine often catch fire. This device has a flame detector installed at the front end of the intake pipe. If a safety hazard is detected, it closes the shutoff valve, opens the bypass valve, and simultaneously activates fire steam in the fiber filter section to ensure safe operation of the device. The fire steam also serves as a backwash for the fiber filter element, extending its service life.

[0063] During the shaping of a special process, odor may be generated. In this case, it is necessary to add a certain amount of odor-eliminating chemicals to the auxiliary agent cylinder, and then the circulating pump enters the exhaust gas washing treatment stage to achieve the purpose of eliminating the odor.

[0064] For other structures of the exhaust gas filtering component and the exhaust gas treatment device described in this embodiment, refer to the prior art.

[0065] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Therefore, any modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An exhaust gas filter component for use in an exhaust gas treatment device, characterized in that: The exhaust gas filtering component comprises: A rectangular frame having a mounting groove; A filter core, the filter core is plate-shaped and is fixed in the mounting groove of the rectangular frame; Wherein, the filter core comprises a first filter layer, a second filter layer and a third filter layer which are sequentially arranged along the direction of exhaust gas passing; The first filter layer is a glass fiber filter element, and the second filter layer is a Lyocell fiber filter element.

2. The exhaust gas filter component according to claim 1, characterized in that: The Lyocell fiber filter element adopts fibrillated Lyocell fiber.

3. The exhaust gas filter component according to claim 1, characterized in that: The third filter layer is formed by compounding multiple layers of polyester non-woven fabrics.

4. The exhaust gas filter component according to claim 1, characterized in that: The rectangular frame includes: A frame body, the frame body being a hollow rectangular frame structure and having a mounting groove; A pressing piece, which is a hollow rectangular plate adapted to the mounting groove of the frame body, and is connected to the frame body by bolts; Wherein, the filter core is placed in the installation groove of the frame body and is pressed and fixed by the pressing piece.

5. The exhaust gas filter component according to claim 4, characterized in that: The surface of the pressing piece in contact with the filter core is connected with a limiting rubber sheet, and the limiting rubber sheet is in close contact with the filter core.

6. The exhaust gas filter component according to claim 4, characterized in that: The frame body is provided with a mounting portion, and the mounting portion is used for hoisting in the exhaust gas treatment device.

7. An exhaust gas treatment device, characterized in that: The exhaust gas treatment device includes the exhaust gas filter component according to any one of claims 1 to 6.

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