A honeycomb composite fiber bed purification device for a coarse coke removal tower

Abstract

The utility model discloses a kind of coarse coke tower honeycomb composite fiber bed purification devices, including tower body and the honeycomb composite fiber bed in tower body, tower body has gas inlet and gas outlet, gas enters tower body through gas inlet, after again passing through honeycomb composite fiber bed, from gas outlet, its characterized in that, honeycomb composite fiber bed includes honeycomb type support flow guide structure and composite fiber material layer;Honeycomb type support flow guide structure is connected with composite fiber material layer, and composite fiber material layer includes coarse effect layer and fine filter layer, coarse effect layer uses polyester or polypropylene fiber knitting framework, and fine filter layer uses the activated carbon fiber with super-hydrophobic coating on surface;Coarse effect layer is fixed outside fine filter layer.The utility model has made breakthrough progress in purification efficiency, operating energy consumption, maintenance frequency and service life etc. by ingenious structure and functional design, provides a kind of efficient, energy-saving, long-life and environmental protection coal gas purification solution for coking industry.

Description

Technical Field

[0001] This utility model relates to the technical field of fiber bed purification, and in particular to a honeycomb composite fiber bed purification device for a coarse coke removal tower. Background Technology

[0002] In the coking industry, the purification and treatment of coke oven gas has always been a key link in achieving environmental protection standards and efficient resource utilization.

[0003] Coke oven gas purification is an indispensable and crucial step in the coking production process, and its purification effect directly affects the safety of equipment, product quality, and environmental compliance in subsequent processes. However, existing fiber bed purification devices suffer from drawbacks such as limited purification efficiency, high energy consumption, and frequent maintenance. In particular, in the coking process, incomplete removal of sticky substances such as tar, naphthalene, and sulfides can easily lead to problems such as blockage of pipelines and catalyst poisoning in subsequent processes. Utility Model Content

[0004] The purpose of this invention is to provide a honeycomb composite fiber bed purification device for coarse coke removal towers, so as to overcome the shortcomings of the prior art.

[0005] To achieve the above-mentioned technical objectives, the technical solution adopted by this utility model is as follows:

[0006] A honeycomb composite fiber bed purification device for a coarse coke removal tower includes a tower body and a honeycomb composite fiber bed disposed within the tower body. The tower body has an air inlet and an air outlet. Gas enters the tower body through the air inlet, passes through the honeycomb composite fiber bed, and then flows out through the air outlet. The honeycomb composite fiber bed comprises a honeycomb-shaped support and guide structure and a composite fiber material layer. The honeycomb support and guide structure is connected to the composite fiber material layer, which includes a coarse filter layer and a fine filter layer. The coarse filter layer uses a polyester or polypropylene fiber woven skeleton, and the fine filter layer uses activated carbon fiber with a superhydrophobic coating on its surface. The coarse filter layer is fixed to the outside of the fine filter layer.

[0007] Further improvements to optimize the technical solution include:

[0008] The aforementioned air inlet is located on the bottom side of the tower body, and the air outlet is located in the middle of the top of the tower body. The honeycomb composite fiber bed is a hollow cylindrical structure. The air outlet is hollowly connected to the upper end of the honeycomb composite fiber bed. The lower end of the honeycomb composite fiber bed is fixed to the lower surface of the tower body, and a drain outlet is provided at the bottom of the tower body.

[0009] The honeycomb-type support and flow guiding structure described above has three layers, which are respectively set on the outside of the coarse layer, between the coarse layer and the fine filter layer, and on the inside of the fine filter layer. The honeycomb-type support and flow guiding structure is composed of several hexagonal honeycomb units arranged in an array, and the mesh connection points of each honeycomb unit form a triangular stable support.

[0010] The aforementioned coarse and fine filtration layers are combined into one, forming an integrated structure with an outer fiber skeleton support and an inner activated carbon adsorption layer.

[0011] The activated carbon fiber surface is coated with a superhydrophobic coating, featuring a biomimetic structure with micron-sized protrusions and nano-sized roughness, a water contact angle ≥160°, and a roll-off angle ≤1°.

[0012] The aforementioned superhydrophobic coating is a fluorosilicone modified polymer material, which is formed on the surface of activated carbon fiber through plasma graft polymerization.

[0013] The coarse filter layer has a fiber diameter of 20-50 μm and a porosity of 60%-80%; the fine filter layer has activated carbon fibers with a diameter of 5-15 μm and a porosity of 85%-95%.

[0014] The honeycomb-shaped support and flow guiding structure described above has a superhydrophobic coating on its surface.

[0015] The thickness of the coarse filter layer is greater than that of the fine filter layer.

[0016] The technical advantages of this utility model are as follows:

[0017] 1. High purification efficiency, thoroughly removing impurities in various forms:

[0018] This invention employs a composite fiber material layer consisting of a coarse filter layer and a fine filter layer, forming a highly efficient gradient filtration structure. The coarse filter layer (polyester / polypropylene fiber) primarily relies on inertial impaction and direct interception mechanisms to effectively remove large particulate dust and larger tar droplets from coke oven gas. The fine filter layer (superhydrophobic activated carbon fiber), through its large specific surface area and microporous structure, strongly adsorbs fine particulate matter and molecular pollutants (such as benzene, naphthalene, and hydrogen sulfide) that have passed through the coarse filter layer. In particular, the superhydrophobic coating ensures that the pores of the fine filter layer are not blocked by sticky substances, allowing its adsorption capacity to be continuously exerted. The synergistic effect of multiple purification mechanisms (interception and adsorption) achieves comprehensive and highly efficient removal of particles, gaseous molecules, and liquid tar, as well as solid dust, fundamentally solving the problem of "incomplete removal."

[0019] 2. Lower operating pressure significantly reduces equipment energy consumption:

[0020] First, the three-layer design of the honeycomb-style support and guide structure, along with its hexagonal honeycomb array, provides a stable and unobstructed flow channel, greatly improving the uniformity of airflow distribution and avoiding localized eddies or dead zones, thereby effectively reducing the resistance of gas passing through the bed. Second, the superhydrophobic coating imparts strong oleophobic and hydrophobic properties to the fiber surface, preventing pore blockage caused by the spread and wetting of tar and other sticky substances on the fiber surface, maintaining the inherent high porosity of the bed, and keeping the pressure drop stable at a low level throughout the entire operating cycle. The reduction in operating resistance directly reduces the energy consumption of power equipment such as induced draft fans.

[0021] 3. Strong self-cleaning ability, significantly extending maintenance cycle:

[0022] One of the core innovations of this invention lies in the superhydrophobic functionalization modification of the activated carbon fiber (ACF) in the fine filter layer. This modified layer possesses an extremely high water contact angle (≥160°) and an extremely low roll-off angle (≤1°), creating a strong "ball effect." When tar droplets come into contact with the fiber surface, they are difficult to adhere to and wet, instead rapidly coalescing into droplets and rolling off under the influence of gravity and airflow. Through the guiding effect of the honeycomb structure, they are ultimately discharged from the bottom drain. This self-cleaning process achieves active and continuous removal of the core clogging substance—tar—avoiding the problem of frequent shutdowns for cleaning or replacement of filter media caused by clogging in traditional devices, thus greatly extending the maintenance cycle.

[0023] 4. Good structural stability and long service life:

[0024] The honeycomb-shaped support and flow guiding structure possesses extremely high mechanical strength. Its triangular, stable support points provide a robust framework for the composite fiber material layer, preventing deformation, compaction, or collapse of the fiber bed under high-speed airflow impact. Simultaneously, the integration of the coarse and fine filtration layers creates an integrated structure of "outer framework support, inner adsorption," significantly enhancing the mechanical properties of the activated carbon fiber layer and avoiding the defects of pure ACF beds such as easy pulverization and structural collapse. This robust structural design ensures long-term stable operation of the device under harsh conditions, extending its overall service life.

[0025] 5. Significant benefits in resource recycling and environmental protection:

[0026] This invention can efficiently separate and remove impurities such as tar. The tar collected from the drain outlet has high purity and can be recycled as a chemical raw material, realizing secondary value-added of resources. At the same time, due to its extremely high purification efficiency, it can ensure that the quality of the outlet gas is consistently up to standard, greatly reducing the emission of harmful pollutants such as hydrogen sulfide and benzo[a]pyrene into the environment. This not only meets increasingly stringent environmental protection requirements but also promotes the green, low-carbon, and sustainable development of the coking industry. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of this utility model.

[0028] The components include: tower body 1, air inlet 11, air outlet 12, liquid outlet 13, honeycomb composite fiber bed 2, honeycomb support and flow guiding structure 21, composite fiber material layer 22, coarse filter layer 22a, and fine filter layer 22b. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this application clearer, the application is described and illustrated below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application. All other embodiments obtained by those skilled in the art based on the embodiments provided in this application without inventive effort are within the scope of protection of this application.

[0030] Obviously, the accompanying drawings described below are merely some examples or embodiments of this application. Those skilled in the art can apply this application to other similar scenarios based on these drawings without any inventive effort. Furthermore, it is understood that although the efforts made in this development process may be complex and lengthy, for those skilled in the art related to the content disclosed in this application, any changes to design, manufacturing, or production based on the technical content disclosed in this application are merely conventional technical means and should not be construed as insufficient disclosure of the content of this application.

[0031] See Figure 1 This embodiment provides a honeycomb composite fiber bed purification device for a coking decoction tower, which mainly includes a tower body 1 and a honeycomb composite fiber bed 2 disposed inside the tower body 1.

[0032] The tower body 1 is a vertical pressure vessel made of carbon steel, with an inner wall that may be lined with an anti-corrosion coating. An air inlet 11 is located on the bottom side of the tower body 1 for introducing the high-temperature coke oven gas to be purified. An air outlet 12 is located at the center of the top of the tower body 1 for discharging the purified clean gas. A liquid drain 13 is located at the bottom of the tower body 1 for draining the separated liquid impurities such as tar, naphthalene, and wastewater.

[0033] The honeycomb composite fiber bed 2 is the core component of this invention. It is a hollow cylindrical structure, fixed to the tower body 1 at its lower end. The upper end of this hollow structure is directly connected to the air outlet 12 at the top of the tower, so that the gas must pass through the fiber bed to reach the outlet.

[0034] The honeycomb composite fiber bed 2 consists of a honeycomb support and flow guiding structure 21 and a composite fiber material layer 22.

[0035] The honeycomb-type support and flow guiding structure 21 has three layers. The first layer is located outside the coarse filter layer 22a, the second layer is sandwiched between the coarse filter layer 22a and the fine filter layer 22b, and the third layer is located inside the fine filter layer 22b. This structure is made of stainless steel sheet through molding and welding, and its units are standard hexagonal honeycomb structures, which are evenly arranged in an array. The mesh connection points of each honeycomb unit form a stable triangular support structure, giving the entire support frame extremely high mechanical strength, capable of resisting the erosion of airflow and the gravity of the bed. The axial direction of the honeycomb unit is parallel to the tower body axis, and its inner wall is smooth, facilitating liquid flow.

[0036] The composite fiber material layer 22 is tightly bonded to the honeycomb support and flow guiding structure 21 and fixed by snap-fit ​​or high-temperature resistant adhesive. It is an integrated structure composed of a coarse filter layer 22a and a fine filter layer 22b through spinning, weaving or lamination processes.

[0037] The coarse-efficiency layer 22a is located on the outer side (windward side) and is made of polypropylene fibers with a diameter between 20-50 μm through a non-woven needle punching process, with a porosity controlled at around 70%. Its main function is to remove larger dust particles (>10 μm) and most liquid droplets from the gas by relying on the mechanical interception and inertial impaction effect of the fibers.

[0038] The fine filtration layer 22b is located on the inner side and is made of adhesive activated carbon fiber (ACF) with a single filament diameter of approximately 10 μm and a porosity exceeding 90%. Before use, the ACF needs to be modified with superhydrophobic functionalization. The specific modification process is as follows: the ACF felt is surface-activated using a plasma cleaner, then immersed in a 5% fluorosilane ethanol solution for 1 hour, and then cured at 120°C for 2 hours. Subsequently, a biomimetic coating with micron-sized protrusions and nano-sized roughness is constructed on the fiber surface using vapor deposition. After this modification, the water contact angle of the ACF fiber surface can reach 161°, and the roll-off angle is less than 1°, exhibiting extremely strong superhydrophobic / oleophobic properties.

[0039] Work process:

[0040] High-temperature coke oven gas enters the tower body 1 tangentially through the bottom inlet 11. Coarse dust particles and droplets are initially separated under centrifugal force and collide with the tower wall, flowing down the wall. Subsequently, the gas flows upward and passes through the honeycomb composite fiber bed 2.

[0041] The gas first encounters the coarse layer 22a, where larger tar droplets and dust are intercepted and captured.

[0042] The gas then passes through the fine filter layer 22b. The superhydrophobic ACF fibers, utilizing their large specific surface area and micropores, efficiently capture fine particulate matter (PM2.5) and gaseous molecular pollutants (such as H2S, benzene, and naphthalene vapors) through Brownian diffusion and adsorption. Simultaneously, their superhydrophobic surface causes the captured tiny tar droplets to rapidly coalesce into larger droplets. Under the "ball effect," these droplets are difficult to adhere to and roll down the ACF fibers onto the underlying honeycomb support structure.

[0043] The honeycomb-structured guide channel directs the collected liquid downwards, eventually falling to the bottom of the tower by gravity and being periodically discharged from the drain outlet 13, thus achieving a self-cleaning function and preventing bed blockage.

[0044] The purified clean gas passes through the bed and is discharged from the top outlet 12, entering the next section.

[0045] The above are merely preferred embodiments of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are within its protection scope. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should be considered within its protection scope.

Claims

1. A honeycomb composite fiber bed purification device for a coke desiccant tower, comprising a tower body (1) and a honeycomb composite fiber bed (2) disposed within the tower body (1), wherein the tower body (1) has an air inlet (11) and an air outlet (12), gas enters the tower body (1) through the air inlet (11), passes through the honeycomb composite fiber bed (2), and flows out from the air outlet (12), characterized in that, The honeycomb composite fiber bed (2) includes a honeycomb support and flow guiding structure (21) and a composite fiber material layer (22); the honeycomb support and flow guiding structure (21) is connected to the composite fiber material layer (22), the composite fiber material layer (22) includes a coarse filter layer (22a) and a fine filter layer (22b), the coarse filter layer (22a) is made of polyester or polypropylene fiber woven skeleton, and the fine filter layer (22b) is made of activated carbon fiber with a superhydrophobic coating on the surface; the coarse filter layer (22a) is fixed on the outside of the fine filter layer (22b).

2. The honeycomb composite fiber bed purification device for coke removal tower according to claim 1, characterized in that, The air inlet (11) is located on the bottom side of the tower body (1), and the air outlet (12) is located in the middle of the top of the tower body (1). The honeycomb composite fiber bed (2) is a hollow cylindrical structure. The air outlet (12) is hollowly connected to the upper end of the honeycomb composite fiber bed (2). The lower end of the honeycomb composite fiber bed (2) is fixed to the lower surface of the tower body (1). A drain outlet (13) is provided at the bottom of the tower body (1).

3. The honeycomb composite fiber bed purification device for coke removal tower according to claim 1, characterized in that, The honeycomb-type support and flow guiding structure (21) has three layers, which are respectively set on the outside of the coarse layer (22a), between the coarse layer (22a) and the fine filter layer (22b), and on the inside of the fine filter layer (22b). The honeycomb-type support and flow guiding structure (21) is composed of several hexagonal honeycomb units arranged in an array, and the mesh connection points of each honeycomb unit form a triangular stable support.

4. The honeycomb composite fiber bed purification device for coke removal tower according to claim 3, characterized in that, The coarse filter layer (22a) and the fine filter layer (22b) are combined into one, forming an integrated structure in which the outer fiber skeleton supports and the inner activated carbon adsorbs.

5. The honeycomb composite fiber bed purification device for coke removal tower according to claim 1, characterized in that, The activated carbon fiber surface is coated with a superhydrophobic coating with a biomimetic structure of micron-sized protrusions and nano-sized roughness, with a water contact angle ≥160° and a roll-off angle ≤1°.

6. The honeycomb composite fiber bed purification device for a coke removal tower according to claim 5, characterized in that, The superhydrophobic coating is a fluorosilicone modified polymer material, which is formed on the surface of activated carbon fiber through plasma graft polymerization.

7. The honeycomb composite fiber bed purification device for coke removal tower according to claim 1, characterized in that, The coarse filter layer (22a) has a fiber diameter of 20-50 μm and a porosity of 60%-80%; the fine filter layer (22b) has activated carbon fibers with a diameter of 5-15 μm and a porosity of 85%-95%.

8. The honeycomb composite fiber bed purification device for coke removal tower according to claim 1, characterized in that, The honeycomb-type support and flow guiding structure (21) has a superhydrophobic coating on its surface.

9. The purification device according to any one of claims 1-8, characterized in that, The thickness of the coarse filter layer (22a) is greater than the thickness of the fine filter layer (22b).

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