Exhaust gas filtering device and exhaust gas purification system of a shaper

Abstract

This utility model discloses an exhaust gas filtration device, which includes a first filter assembly and a second filter assembly installed inside an insulated chamber. The first filter assembly includes an annular, rotatable filter belt that longitudinally divides the insulated chamber into a first air chamber and a second air chamber. The filter belt is located in the first air chamber, and the second filter assembly is located in the second air chamber. The first air chamber has an air inlet, and the second air chamber has an air outlet, which are positioned opposite each other. A sealing partition is provided on the top of the insulated chamber, and the bent portion of the filter belt is located within the sealing partition. A brush roller, a blower pipe, and a dust collection mechanism are also installed within the sealing partition. This exhaust gas filtration device, together with a high-temperature incineration device for removing oil mist particles, forms a stenter exhaust gas purification system, which can reduce the exhaust gas emission rate and save energy.

Description

Technical Field

[0001] This utility model relates to the field of printing and dyeing machinery and equipment, and in particular to a waste gas purification system for a stenter. Background Technology

[0002] The setting machine is a key piece of equipment in the textile printing and dyeing industry used to finish the shape of fabrics. The composition of the exhaust gas generated during its operation is closely related to the fabric type, printing and dyeing process, auxiliary agents used and temperature, etc. It mainly includes the following types of substances: 1) solid or semi-solid particles such as fiber debris, dye particles, and auxiliary agent powder, with a wide range of particle sizes (from nanometer to micrometer). Some particles adsorb organic pollutants to form composite pollutants.

[0003] 2) Volatile Organic Compounds (VOCs): Alkanes / Alkenes: such as methane, ethane, ethylene (from the high-temperature decomposition of textile fibers); Aromatic Hydrocarbons: benzene, toluene, xylene (possibly from dyes or solvents); Esters / Alcohols: ethyl acetate, ethanol (from solvents in printing and dyeing auxiliaries); Aldehydes and Ketones: formaldehyde, acetone (decomposition products of auxiliaries at high temperatures);

[0004] 3) Oil mist particles formed by the volatilization of grease, emulsifiers, softeners, etc. on fabrics at high temperatures, mix with VOCs to form "oil-gas" composite pollutants. These particles are highly adhesive and easily adhere to the inner walls of equipment or pipes, forming oil stains that are difficult to clean.

[0005] The current mainstream solution for treating stenter exhaust gas is: flue gas collection → cooling and filtration (gas-to-gas or gas-to-water exchange, water spray circulation cooling) → electrostatic purification → heating → emission to meet standards. However, after installing a heat exchanger in the stenter, the oil fumes and particulate matter in the exhaust gas condense due to cooling. The condensed oil and particulate matter severely clog and pollute the exchange medium. As the pollution level worsens, the exchanger fails, causing blockages and even fires. The high viscosity of oil and particulate matter, coupled with the very large heat exchange area, makes maintenance extremely difficult. On the other hand, electrostatic purification can remove most of the oil. However, electrostatic purification requires the flue gas temperature to be reduced to below 55°C. At this temperature, even if the exhaust gas is reused, it will not achieve energy savings. Therefore, there is an urgent need to develop a stenter purification system with lower energy consumption. The filtration efficiency of solid or semi-solid particles such as fiber debris, dye particles, and auxiliary agent powders is also a key focus of this research. Utility Model Content

[0006] One of the objectives of this invention is to provide a waste gas filtration device.

[0007] The technical solution to achieve the first objective of this utility model is: a waste gas filtration device, comprising a horizontally arranged insulated chamber, wherein a first filter assembly and a second filter assembly are installed inside the insulated chamber. The first filter assembly includes an annular, rotatable filter belt, which longitudinally divides the insulated chamber into a first air chamber and a second air chamber. Wind baffles are respectively provided on the upper and lower sides of the filter belt. The filter belt is located in the first air chamber, and the second filter assembly is located in the second air chamber. The first air chamber has an air inlet, and the second... The air chamber has an air outlet, and the air inlet and the air outlet are arranged opposite to each other; the top of the insulated box is provided with a sealing partition, the filter belt has a bend, the bend is located inside the sealing partition, the sealing partition is also equipped with a brush roller, an air spray pipe and a dust collection mechanism, the air spray pipe is located in the annular area of ​​the bend, the sealing partition is provided with a dust collection box that communicates with the dust collection mechanism, the dust collection box is adjacent to the bend, the brush roller is installed in the dust collection box and abuts against the bend.

[0008] Furthermore, a vortex fan is installed on the top of the insulated box, and the air spray pipe is connected to the vortex fan through an air inlet pipe. The other end of the vortex fan is connected to an air suction pipe, which is located in the second air chamber.

[0009] Furthermore, the second filter assembly includes several longitudinally parallel, plate-shaped second filter screens. These second filter screens are detachably installed within the second filter space. The horizontal position of each second filter screen gradually increases or decreases from the side closest to the filter belt towards the side away from the filter belt. The higher end of the second filter screen is the beginning end, and the lower end is the end end. The beginning end of one of two adjacent second filter screens closest to the filter belt is connected to the end end of the other second filter screen via an air baffle. The gradient horizontal position of the second filter screens, in conjunction with the sealing plate, extends the air inlet path and increases the filtration area.

[0010] The exhaust gas filtration device that achieves the first objective of this utility model has a simple structure. The two air chambers enable two-stage filtration. High-temperature exhaust gas is introduced into the insulated chamber, avoiding the oil collection problem of conventional filter screens. The mesh is not easily clogged, thus improving the filtration efficiency of solid or semi-solid particles such as fiber debris, dye particles, and auxiliary agent powder.

[0011] The second objective of this utility model is to provide a purification system for exhaust gas from a stenter.

[0012] The technical solution to achieve the second objective of this utility model is: a stenter exhaust gas purification system, which is installed on the top of the drying chamber body. The stenter exhaust gas purification system includes a horizontally arranged filter and heat preservation device and a high-temperature incineration device for removing oil mist particles. The structure of the filter and heat preservation device is as described in the first objective of the aforementioned utility model. An exhaust gas discharge pipe is provided on the top of the drying chamber body. The air inlet is connected to the exhaust gas discharge pipe through a first air inlet pipe. The air outlet is connected to the high-temperature incineration device through a first air outlet pipe. The high-temperature incineration device has a second air outlet pipe, and the second air outlet pipe is connected to the drying chamber body through several air inlet branch pipes.

[0013] The second objective of this utility model is to achieve a stenter exhaust gas purification system that adopts a process flow of exhaust gas collection - high-temperature filtration system to remove particulate matter - high-temperature combustion purification - air reuse, which can reduce the exhaust gas emission rate and save energy. Attached Figure Description

[0014] Figure 1 This is a front perspective view of the exhaust gas filtration device described in Embodiment 1 of this utility model; wherein, the arrows represent the airflow direction;

[0015] Figure 2 for Figure 1 A top-down partial perspective structural diagram;

[0016] Figure 3 This is a schematic diagram of the structure of the stenter exhaust gas purification system described in Embodiment 2 of this utility model. Detailed Implementation

[0017] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Example 1

[0018] like Figure 1 and Figure 2As shown, a stenter exhaust gas purification system includes a horizontally arranged insulated chamber 1. A first filter assembly 2 and a second filter assembly 3 are installed inside the insulated chamber 1. The first filter assembly 2 includes an annular, rotatable filter belt 21, which longitudinally divides the insulated chamber 1 into a first air chamber 10 and a second air chamber 20. The filter belt 21 has baffles (not shown) on its upper and lower sides to prevent exhaust gas from escaping from the sides of the filter belt into the second air chamber. The filter belt 21 is located in the first air chamber 10, and the second filter assembly 2 is located in the second air chamber 20. The first air chamber 10 has an air inlet 101, and the second air chamber 20 has an air outlet 201, which are arranged opposite to each other. The top of the insulated chamber 1... A sealing partition 30 is provided. The filter belt 21 has a bend 211, which is located inside the sealing partition 30. A brush roller 4, an air spray pipe 5, and a dust collection mechanism 6 are also installed inside the sealing partition 30. The air spray pipe 5 is located in the annular area of ​​the bend 211. A vortex fan 7 is installed on the top of the insulated box 1. The air spray pipe 5 and the vortex fan 7 are connected through an air inlet pipe 71. The other end of the vortex fan 7 is connected to a suction pipe 72, which is located inside the second air chamber 20. A dust collection box 8 connected to the dust collection mechanism 6 is provided inside the sealing partition. The dust collection box is adjacent to the bend 211. The brush roller 4 is installed inside the dust collection box 8 below the bend 211, and the brush roller 8 abuts against the bend 211.

[0019] Furthermore, the second filter assembly 3 includes several longitudinally parallel plate-shaped second filter screens 31. The second filter screens 31 are detachably installed in the second filter space 20. The horizontal position of each second filter screen 31 gradually increases from the side close to the filter belt 21 to the side away from the filter belt 21. The higher horizontal position of the second filter screen 31 is the filter head end 311, and the lower horizontal position of the second filter screen 31 is the filter tail end 312. The filter head end 311 of the second filter screen 31 close to the filter belt 21 of two adjacent second filter screens 31 is connected to the filter tail end 312 of the other second filter screen 31 by a wind baffle 32. Example 2

[0020] like Figures 1 to 3As shown, a stenter exhaust gas purification system is installed on the top of the drying chamber body 100. The stenter exhaust gas purification system includes a horizontally arranged filter and heat preservation device 200 and a high-temperature incineration device 300 for removing oil mist particles. The structure of the filter and heat preservation device 200 is as described in Embodiment 1. An exhaust gas discharge pipe 1001 is provided on the top of the drying chamber body 100. The air inlet 101 is connected to the exhaust gas discharge pipe 1001 through a first air inlet pipe 1002. The air outlet 201 is connected to the high-temperature incineration device 300 through a first air outlet pipe 1003. The high-temperature incineration device 300 has a second air outlet pipe 3001, which is connected to the drying chamber body 100 through several air inlet branch pipes 1004.

[0021] The working principle of the stenter exhaust gas purification system implemented in this embodiment is as follows:

[0022] The high-temperature, humid waste gas emitted from the drying oven body 100 enters the filtration and insulation device 200 through the waste gas emission pipe 1001. Inside the filtration and insulation device 200, the waste gas undergoes initial filtration through the filter belt 21 of the first air chamber 10. The initially filtered waste gas then passes through the filter belt 21 and enters the second air chamber 20, where it undergoes secondary filtration through each of the second filter screens 32. The two filtrations essentially remove solid or semi-solid particles such as fiber debris, dye particles, and auxiliary agent powder. The high-temperature gas then enters the high-temperature incineration device 300 through the outlet, where oily substances such as oil fumes are burned. The incinerated high-temperature gas then enters the drying oven body 100 through the inlet branch pipe 1004 for recycling.

[0023] During the rotation of the filter belt 21, the brush roller 4 brushes off the debris particles on the filter belt 21, and the air spray pipe 5 blows hot air that has been purified twice onto the filter belt 21, sucking the debris particles in the sealed partition 30 into the dust collection box, and finally the dust is collected by the dust collection mechanism 6.

[0024] When the second filter 31 needs to be cleaned, simply pull the second filter 31 out of the insulation box 1 for cleaning, and then insert it back into the insulation box 1 after cleaning.

[0025] High-temperature combustion is one of the common methods for treating oily waste gas. The high-temperature incineration device described in this utility model is prior art and is not the point of this invention, so it will not be described in detail here.

[0026] The air source of the blower pipe described in this utility model is not limited to that shown in the embodiment. The embodiment uses air that has been purified twice and has a certain temperature in the second air chamber as the air source of the blower pipe to blow air to the bend of the filter belt, which can ensure that the temperature inside the heat preservation box is consistent and facilitate the dust collection mechanism to suck the debris particles in the sealed partition into the dust box.

[0027] The dust collection mechanism can be a bag filter or other conventional dust collection device in the field of dust collection, which will not be described in detail here.

[0028] The structure of the second filter assembly is not limited to that shown in the embodiment. The second filter with a gradient change in horizontal position cooperates with the sealing plate to extend the air intake path and increase the filtration area.

[0029] Furthermore, the terms "first" and "second" are used only to distinguish between the same structural components and should not be interpreted as indicating or implying relative importance.

[0030] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent process transformations made using the content of this utility model specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. An exhaust gas filtering device, characterized by: It includes a horizontally arranged insulated chamber, inside which a first filter assembly and a second filter assembly are installed. The first filter assembly includes an annular, rotatable filter belt that longitudinally divides the insulated chamber into a first air chamber and a second air chamber. Wind deflectors are provided on the upper and lower sides of the filter belt. The filter belt is located in the first air chamber, and the second filter assembly is located in the second air chamber. The first air chamber has an air inlet, and the second air chamber has an air outlet, which are positioned opposite each other. A sealing partition is provided on the top of the insulated chamber. The filter belt has a bent portion located within the sealing partition. A brush roller, an air spray pipe, and a dust collection mechanism are also installed within the sealing partition. The air spray pipe is located within the annular area of ​​the bent portion. A dust collection box communicating with the dust collection mechanism is provided within the sealing partition. The dust collection box is adjacent to the bent portion, and the brush roller is installed within the dust collection box, abutting against the bent portion.

2. The exhaust filter device of claim 1, wherein: A vortex fan is installed on the top of the insulated box. The air spray pipe is connected to the vortex fan through an air inlet pipe. The other end of the vortex fan is connected to an air suction pipe, which is located in the second air chamber.

3. The waste gas filtration device according to claim 1, characterized in that: The second filter assembly includes several longitudinally parallel, plate-shaped second filter screens. The second filter screens are detachably installed inside the second filter assembly. The horizontal position of each second filter screen is gradually raised or lowered from the side closer to the filter belt to the side away from the filter belt. The higher end of the second filter screen is the beginning end of the filter screen, and the lower end of the second filter screen is the end end of the filter screen. The beginning end of the second filter screen closer to the filter belt in two adjacent second filter screens is connected to the end end of the other second filter screen through a baffle plate.

4. A setting machine exhaust gas purification system installed at the top of a drying room body, characterized by: The stenter exhaust gas purification system includes horizontally arranged filter and heat preservation devices and a high-temperature incineration device for removing oil mist particles, the structure of which is as described in claim 1; the top of the drying chamber body is provided with an exhaust gas discharge pipe, the air inlet is connected to the exhaust gas discharge pipe through a first air inlet pipe, the air outlet is connected to the high-temperature incineration device through a first air outlet pipe, the high-temperature incineration device has a second air outlet pipe, and the second air outlet pipe is connected to the drying chamber body through several air inlet branch pipes.

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