Dry filter for RTO pretreatment

Abstract

This invention discloses a dry filter for RTO pretreatment, comprising a main frame and two 304 stainless steel wire mesh layers installed on one side of the main frame. A ceramic saddle ring layer is also installed on one side of the main frame, inside the 304 stainless steel wire mesh layer. Maintenance doors are provided on both sides of the main frame, opposite to the 304 stainless steel wire mesh layer and the ceramic saddle ring layer, facilitating inspection and maintenance. A drain pipe is fixedly installed at the bottom of the main frame, on the side of the ceramic saddle ring layer. Both the 304 stainless steel wire mesh layer and the ceramic saddle ring layer are made of materials with high temperature resistance and acid / alkali corrosion resistance. After a period of use, they can be reused after cleaning, eliminating the need for frequent replacement and maximizing service life, thus significantly reducing the user's daily filtration consumable costs.

Description

Technical Field

[0001] This invention relates to the field of filters, specifically to dry filters for RTO pretreatment. Background Technology

[0002] The filter media used in commonly used dry filters for RTO pretreatment on the market vary greatly in quality and effectiveness. These filters often use filter cotton and filter bags, which need to be replaced promptly once clogged with dust; otherwise, the system's treatment efficiency will be significantly reduced. Furthermore, some dry filters also have a wet spray treatment process upstream. If the water mist is not completely blocked upstream, the water mist will enter the dry filter under the action of the centrifugal fan, causing the filter media to become completely wet, accelerating clogging, preventing exhaust gas from passing through, and greatly reducing the system's treatment efficiency. Additionally, the filter media used in currently available dry filters for RTO pretreatment have a high density and high air resistance, and due to frequent clogging, they affect the overall system treatment efficiency, easily leading to substandard exhaust gas treatment. Moreover, filter media are consumables; once clogged, they need to be replaced promptly, thus increasing the user's expenses.

[0003] Therefore, those skilled in the art have provided dry filters for RTO pretreatment to address the problems mentioned in the background section. Summary of the Invention

[0004] The purpose of this invention is to provide a dry filter for RTO pretreatment to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A dry filter for RTO pretreatment includes a main frame of the dry filter. Two 304 stainless steel wire mesh layers are installed on one side of the main frame. A ceramic saddle ring layer is installed inside the main frame on one side of the 304 stainless steel wire mesh layer. Maintenance doors for easy inspection and maintenance are provided on both sides of the main frame, opposite to the 304 stainless steel wire mesh layer and the ceramic saddle ring layer. A drain pipe is fixedly installed at the bottom of the main frame on one side of the ceramic saddle ring layer, and the drain pipe communicates with the interior of the main frame.

[0007] As a further aspect of the present invention: a fixing frame is provided between the 304 stainless steel wire mesh layer and the ceramic saddle ring layer and the main frame of the dry filter, and the fixing frame is welded to the main frame of the dry filter.

[0008] As a further embodiment of the present invention: the fixed card frame includes a central card frame frame, side card frame frames disposed on both sides of the central card frame frame, a concave central card groove formed on the inner wall of the central card frame frame, a central sealing gasket glued to the inner wall of the central card groove, four side through grooves formed on the side card frame frame, and side sealing gaskets glued to the two inner walls opposite to the side through grooves.

[0009] As a further aspect of the present invention: the 304 stainless steel wire mesh layer and the ceramic saddle ring layer are each composed of eight pieces, and are sealed and pressed with the fixing frame through the central sealing gasket and the side sealing gasket.

[0010] As a further aspect of the present invention: one side of the inspection door is connected to the main frame of the dry filter via a hinge, and the other side is connected to the main frame of the dry filter via an elastic snap-fit; a sealing gasket for sealing is pressed between the inspection door and the main frame of the dry filter.

[0011] As a further embodiment of the present invention: an air inlet is integrally formed at one end of the main frame of the dry filter, an air outlet is integrally formed at the other end of the main frame of the dry filter, and base feet are fixedly installed at the four corners and the middle of the bottom of the main frame of the dry filter.

[0012] As a further aspect of the present invention: the fixing frame is made of stainless steel, and the 304 stainless steel wire mesh layer is made of stainless steel frame, and the frame is made of multiple layers of densely arranged weft wires in stainless steel wire mesh, and the thickness of the 304 stainless steel wire mesh layer is 50mm.

[0013] As a further aspect of the present invention: the ceramic saddle ring layer consists of a stainless steel frame and multiple saddle rings placed inside the stainless steel outer frame, and its thickness is 500mm.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] The 304 stainless steel wire mesh layer in this invention has a simple structure, is lightweight, and is easy to install, operate, and maintain. Due to the dense arrangement and multiple layers of wires, the overall porosity is high, and the contact surface area is greatly increased, making it easier to intercept particles and water mist in the exhaust gas, thus improving filtration efficiency. Furthermore, the overall wind resistance of the wire mesh is low. The ceramic saddle ring layer, due to the shape characteristics of the packing material, overlaps with each other, forming an interlocking structure and arc-shaped air passage, thereby increasing the porosity and contact surface area of ​​the packing material, reducing overall wind resistance, and further facilitating the uniform distribution of gas and liquid flow and the interception of particles and water mist in the exhaust gas. It also reduces the radial diffusion coefficient when the liquid flows downwards. Moreover, both the 304 stainless steel wire mesh layer and the ceramic saddle ring layer are made of materials that are resistant to high temperatures and acid and alkali corrosion. After a period of use, they can be reused after cleaning, eliminating the need for frequent replacement and maximizing service life, significantly reducing the user's daily filtration consumable costs. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention;

[0017] Figure 2 This is a front sectional view of the present invention;

[0018] Figure 3 This is a top sectional view of the present invention;

[0019] Figure 4 This is the left view of the present invention;

[0020] Figure 5 This is a left view of the fixed card frame in this invention;

[0021] Figure 6 This is a cross-sectional view of the middle frame of the fixed frame in the present invention;

[0022] Figure 7 This is a side view of the side frame of the fixed card frame in the present invention.

[0023] In the diagram: 1. Dry filter main frame; 2. Air inlet; 3. Air outlet; 4. 304 stainless steel wire mesh layer; 5. Ceramic saddle ring layer; 6. Base; 7. Inspection door; 8. Drain pipe; 10. Fixing frame; 1001. Middle frame; 1002. Side frame; 1003. Middle slot; 1004. Middle sealing gasket; 1005. Side passage groove; 1006. Side sealing gasket. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] Please see Figures 1-7 In this embodiment of the invention, the dry filter for RTO pretreatment includes a dry filter main frame 1. A 304 stainless steel wire mesh layer 4 is installed on one side inside the dry filter main frame 1. There are two 304 stainless steel wire mesh layers 4. A ceramic saddle ring layer 5 is installed inside the dry filter main frame 1 on one side of the 304 stainless steel wire mesh layer 4. On one side wall of the dry filter main frame 1, on both sides opposite to the 304 stainless steel wire mesh layer 4 and the ceramic saddle ring layer 5, there are maintenance doors 7 for easy inspection and maintenance. A drain pipe 8 is fixedly installed at the bottom of the dry filter main frame 1 on one side of the ceramic saddle ring layer 5. The drain pipe 8 is connected to the inside of the dry filter main frame 1.

[0026] By adopting the above technical solution, the 304 stainless steel wire mesh layer 4 has a simple structure, is lightweight, and is easy to install, operate, and maintain. Due to the dense arrangement of the wires and the setting of multiple layers, the overall porosity is large and the contact surface area is greatly increased, making it easier to intercept particles and water mist in the exhaust gas, thus improving the filtration efficiency. Moreover, the overall wind resistance of the wire mesh is low. Due to the shape characteristics of the packing material, the ceramic saddle ring layer 5 is in an overlapping state, forming an interlocking structure and arc-shaped air passage, thereby increasing the porosity and contact surface area of ​​the packing material, reducing the overall wind resistance, and making it more conducive to the uniform distribution of gas and liquid flow and the interception of particles and water mist in the exhaust gas. At the same time, it also reduces the radial diffusion coefficient when the liquid flows downward. In addition, both the 304 stainless steel wire mesh layer 4 and the ceramic saddle ring layer 5 are made of materials with high temperature resistance and acid and alkali corrosion resistance. After a period of use, they can be reused after cleaning, without frequent replacement, maximizing the service life and greatly reducing the user's daily filtration consumable expenses.

[0027] Among them, a fixing frame 10 is provided between the 304 stainless steel wire mesh layer 4 and the ceramic saddle ring layer 5 and the dry filter main frame 1. The fixing frame 10 is welded to the dry filter main frame 1 to fix the 304 stainless steel wire mesh layer 4 and the ceramic saddle ring layer 5.

[0028] The fixed card frame 10 includes a central card frame 1001, side card frame frames 1002 disposed on both sides of the central card frame 1001, a concave central card groove 1003 formed on the inner wall of the central card frame 1001, a central sealing gasket 1004 glued to the inner wall of the central card groove 1003, four side passage grooves 1005 formed on the side card frame 1002, and side sealing gaskets 1006 glued to the two opposite inner walls of the side passage grooves 1005.

[0029] The 304 stainless steel wire mesh layer 4 and the ceramic saddle ring layer 5 each consist of eight pieces, and are sealed and pressed with the fixing frame 10 through the central sealing gasket 1004 and the side sealing gasket 1006. By setting the 304 stainless steel wire mesh layer 4 and the ceramic saddle ring layer 5 into eight pieces, the weight of a single piece can be greatly reduced, which facilitates later maintenance.

[0030] The inspection door 7 is connected to the dry filter main frame 1 on one side by a hinge and to the dry filter main frame 1 on the other side by an elastic buckle. A sealing gasket for sealing is pressed between the inspection door 7 and the dry filter main frame 1, and the inside of the dry filter can be inspected and maintained through the inspection door 7.

[0031] The dry filter main frame 1 has an air inlet 2 integrally formed at one end, an air outlet 3 integrally formed at the other end, and base feet 6 are fixedly installed at the four corners and the middle of the bottom of the dry filter main frame 1.

[0032] In this embodiment, the fixed card frame 10 is made of stainless steel, and the 304 stainless steel wire mesh layer 4 is made of stainless steel frame. The frame is made of multiple layers of densely arranged weft wires in stainless steel wire mesh. The thickness of the 304 stainless steel wire mesh layer 4 is 50mm.

[0033] In this embodiment, the ceramic saddle ring layer 5 consists of a stainless steel frame and multiple saddle rings placed inside the stainless steel outer frame, and its thickness is 500mm. The ceramic saddle ring is an aluminosilicate filler made of high-quality high-alumina and low-iron clay with a certain amount of feldspar, quartz and other raw materials, processed through multiple production processes.

[0034] The working principle of this invention is as follows: VOCs exhaust gas containing mist and dust particles enters the dry filter at a certain speed.

[0035] First, through the 304 stainless steel wire mesh layer 4, under inertia, mist and dust particles collide with the fine wires and adhere to their surface. The diffusion and gravitational settling of these particles on the wire surface cause them to form larger droplets that flow along the wires to the junction of the two wires. Due to the wettability of the wires and the surface tension of the liquid, the droplets eventually separate from the wires when their own weight exceeds the combined force of the gas's upward force and the liquid's surface tension, thus achieving the interception of pollutants. The use of two stages of 304 stainless steel wire mesh layers 4 improves the efficiency of mist and dust particle removal with relatively low air resistance.

[0036] Secondly, the exhaust gas, after being treated by two stages of 304 stainless steel wire mesh layer 4, still contains a very small amount of mist and dust particles, which are then further treated by the ceramic saddle ring layer 5. The filter layer, composed of multiple stacked ceramic saddle rings, has a large porosity. However, due to its large contact surface area, the remaining mist and dust particles in the exhaust gas are adhered and intercepted upon collision with the saddle rings. Under continuous interception, they form larger droplets and settle, thereby achieving the interception and treatment of the remaining mist and dust particles.

[0037] Secondly, the dry filter has a drain outlet at the bottom. After the intercepted mist and dust fall to the bottom of the filter, they are discharged to the corresponding sewage treatment system through the drain outlet and drain pipe 8.

[0038] Finally, the mist and dust particles contained in the exhaust gas pass through a 304 stainless steel wire mesh and a ceramic saddle ring layer 5, achieving a treatment efficiency of 97% or higher. The remaining VOCs exhaust gas enters the RTO equipment for further treatment.

[0039] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A dry filter for RTO pretreatment, comprising a dry filter body frame (1), characterized in that: The dry filter main frame (1) has a 304 stainless steel wire mesh layer (4) installed on one side inside. There are two 304 stainless steel wire mesh layers (4). The dry filter main frame (1) has a ceramic saddle ring layer (5) installed on one side of the 304 stainless steel wire mesh layer (4). The dry filter main frame (1) has maintenance doors (7) on one side wall of the dry filter, on opposite sides of the 304 stainless steel wire mesh layer (4) and the ceramic saddle ring layer (5). The dry filter main frame (1) has a drain pipe (8) fixedly installed at the bottom of the dry filter main frame (1) on one side of the ceramic saddle ring layer (5). The drain pipe (8) is connected to the inside of the dry filter main frame (1). A fixing frame (10) is provided between the 304 stainless steel wire mesh layer (4) and the ceramic saddle ring layer (5) and the dry filter main frame (1), and the fixing frame (10) is welded to the dry filter main frame (1). The fixed card frame (10) is made of stainless steel, and the 304 stainless steel wire mesh layer (4) is made of stainless steel frame, and the frame is made of multiple layers of stainless steel wire mesh with densely arranged weft wires. The thickness of the 304 stainless steel wire mesh layer (4) is 50mm. The ceramic saddle ring layer (5) consists of a stainless steel frame and multiple saddle rings placed inside the stainless steel outer frame, and its thickness is 500mm.

2. The dry filter for RTO pretreatment according to claim 1, characterized in that: The fixed card frame (10) includes a central card frame frame (1001), side card frame frames (1002) disposed on both sides of the central card frame frame (1001), a concave central card groove (1003) opened on the inner wall of the central card frame frame (1001), a central sealing gasket (1004) glued to the inner wall of the central card groove (1003), four side through grooves (1005) opened on the side card frame frame (1002), and side sealing gaskets (1006) glued to the two opposite inner walls of the side through grooves (1005).

3. The dry filter for RTO pretreatment according to claim 2, characterized in that: The 304 stainless steel wire mesh layer (4) and the ceramic saddle ring layer (5) are each composed of eight pieces, and are sealed and pressed with the fixed card frame (10) through the central sealing gasket (1004) and the side sealing gasket (1006).

4. The dry filter for RTO pretreatment according to claim 1, characterized in that: The inspection door (7) is connected to the dry filter main frame (1) on one side by a hinge, and to the dry filter main frame (1) on the other side by an elastic buckle. A sealing gasket for sealing is pressed between the inspection door (7) and the dry filter main frame (1).

5. The dry filter for RTO pretreatment according to claim 1, characterized in that: The dry filter main frame (1) has an air inlet (2) integrally formed at one end and an air outlet (3) integrally formed at the other end. The dry filter main frame (1) has bases (6) fixedly installed at the four corners and the middle of the bottom end.

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