Metal filter dust and nitre integrated equipment

Abstract

The utility model provides a metal filter material dust and nitration integration equipment, including the casing, the casing includes the flue gas import, the clean gas export, the filter module. The filter module is metal filter material filter unit, and metal filter material filter unit is by metal wire mesh filter material layer, metal porous sintered plate filter material layer, metal fiber felt filter material layer, metal wire mesh filter material layer four -layer filter structure of composition, sprays catalyst coating in the second layer, third layer filter unit. The gradient filtration of flue gas is realized through the composite design of four -layer filter unit, and the peeling problem of catalyst coating under the action of smoke dust impact and pulse dust cleaning is avoided.

Description

Technical Field

[0001] This utility model relates to the field of industrial dust treatment technology, and in particular to an integrated equipment for dust and nitrification using metal filter media. Background Technology

[0002] Industrial flue gas has a complex composition, often containing particulate matter pollutants such as PM2.5 and PM10, as well as nitrogen oxides (NOx). x This type of gaseous pollutant is called NO. Traditional industrial flue gas treatment processes often employ a series combination of selective catalytic reduction (SCR) denitrification and bag / electrostatic precipitator technology, which requires complex equipment setups. To achieve integrated denitrification and dust removal, catalytically active powder materials can be coated onto the surface of filter bag fibers. This allows the filter bags to perform two functions simultaneously: first, filtering dust particles from the flue gas through the retention of the filter bag fibers; and second, relying on the surface catalyst powder to remove NO from the flue gas. x Catalytic reduction is carried out to complete the denitrification reaction.

[0003] However, in actual operation, the continuous impact and friction of dust-laden flue gas, as well as the scouring of high-pressure airflow during pulse cleaning of the dust collector, impact the coating layer, causing the catalytic powder coating layer to peel off, resulting in a decrease in the denitrification performance of the filter bag, a reduction in flue gas filtration effect, and a decrease in flue gas treatment efficiency. Summary of the Invention

[0004] To address the aforementioned problems, this utility model provides an integrated equipment for dust and nitrification using metal filter media.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A metal filter material dust and nitrification integrated equipment includes: a housing, the housing including a flue gas inlet, a clean gas outlet and a filter module; flue gas enters through the flue gas inlet and is filtered by the filter module to obtain purified flue gas, and the purified flue gas is discharged through the clean gas outlet. The filter module divides the interior of the housing into a dust-side chamber that communicates with the flue gas inlet and a clean-side chamber that communicates with the clean gas outlet. The filtration module is a metal filter unit, which is a four-layer filtration structure consisting of a metal wire mesh filter layer, a metal porous sintered plate filter layer, a metal fiber felt filter layer, and a metal wire mesh filter layer. According to the order in which the flue gas passes, the metal filter unit specifically comprises: The first layer is a metal wire mesh filter material layer with a thickness of 1.5-2.0 mm; The metal wire mesh filter layer is composed of three layers of plain-weave wire mesh sintered together: the outer layer uses 23-24 mesh plain-weave wire mesh with a wire diameter of 0.30-0.40 mm and a pore size of 700-750 μm, forming a layer with a thickness of 0.6-0.95 mm; the middle layer uses 85-94 mesh medium-diameter wire mesh with a wire diameter of 0.10-0.12 mm, a pore size of 150-200 μm, and a thickness of 0.3-0.5 mm; the inner layer uses 299-318 mesh fine wire mesh with a wire diameter of 0.03-0.04 mm, a pore size of 45-50 μm, and a thickness of 0.2-0.35 mm.

[0006] The outer layer, composed of a 0.6-0.95mm thick plain-weave skeleton made of large-diameter filaments (20-28 mesh, 0.30-0.40mm), provides bending stiffness to withstand the initial impact of dust-laden flue gas. The filaments disperse the impact force through minute elastic deformation, preventing concentrated stress from being transferred to the downstream filter layer. Simultaneously, it converts the impact kinetic energy into elastic potential energy, reducing the scouring intensity of the airflow on subsequent filter layers. It effectively blocks coarse particles with a diameter >750μm in the flue gas.

[0007] The middle layer is woven from medium-diameter filaments of 85-94 mesh with a diameter of 0.10-0.12 mm and a pore size of 150-200 μm, which can capture dust particles larger than 200 μm. Its denser mesh structure further filters out particles that are not intercepted by the outer layer, while dividing the flue gas into finer streams, further dissipating the kinetic energy of the airflow.

[0008] The inner layer is woven from fine filaments of 299-318 mesh with a diameter of 0.03-0.04 mm and a pore size of 45-50 μm, capable of intercepting particles larger than 50 μm while further refining the airflow. The resistance gradient of the three-layer mesh forces the flue gas flow to become more uniform, controlling the velocity variation coefficient to below 8%, thereby eliminating the direct and continuous scouring of the second catalytic sintered plate filter material layer by local high-speed jets. This scouring is the key hydrodynamic factor leading to wear and peeling of the surface catalyst coating.

[0009] The three layers of metal mesh filter media feature an increasing mesh count and decreasing pore size from the outermost to the innermost layer. This achieves step-by-step interception of dust particles of different sizes, preventing large particles from directly impacting the subsequent catalyst layer. Furthermore, the reduced pore size increases the resistance to flue gas flow, dissipating its kinetic energy and lowering its velocity, thus preventing high-speed jets from impacting the catalyst coating in the subsequent structure. Simultaneously, the intercepted dust forms a loose dust cake on the outside of the metal mesh filter media, serving as a pre-filtration layer and reducing the risk of clogging in the inner layers.

[0010] The second layer is a porous metal sintered plate filter media layer with a thickness of 3-5mm; The porous metal sintered plate filter media layer is formed by high-temperature sintering of metal powder particles into a three-dimensional metal skeleton, possessing advantages such as large specific surface area and strong adhesion. A V₂O₅-WO₃ / TiO₂ catalyst coating is applied to the surface and internal pore walls. The catalyst is loaded onto the surface and surface pores of the porous metal sintered plate, ensuring full contact with the flue gas and effectively removing NO₂. x The NH3 that has permeated into this layer undergoes a reduction reaction on the catalyst surface to become N2, thus achieving the denitrification reaction of the flue gas.

[0011] The third layer is a metal fiber felt filter material layer with a thickness of 1.0-1.5mm; The metal fiber felt filter layer is formed by the disordered stacking and sintering of micron-sized metal fibers, creating a denser fiber network with pore sizes of 2-20 μm, capable of capturing submicron-sized dust particles (PM1.0) that can penetrate the first two layers. MnO is coated onto the surface of the metal fibers in the metal fiber felt filter layer. x -CeO2-based molecular sieve, MnO x - The CeO2-based molecular sieve complements the V2O5-WO3 / TiO2 of the second layer of porous metal sintered plate filter media, ensuring NO x Deep purification.

[0012] The fourth layer is a metal wire mesh filter layer with a thickness of 1.0 mm; The metal wire mesh filter layer serves as a back pressure support layer. It is made of plain or twill woven metal mesh with a mesh count of 8–16 mesh, a wire diameter of 0.8–1.2 mm, and a thickness of 1.0 mm.

[0013] The 8–16 mesh size and 0.8–1.2 mm wire diameter endow the metal wire mesh filter layer with good bending stiffness. During pulse cleaning, it serves as the primary load-bearing structure for impact loads, absorbing and dispersing airflow energy, and protecting the integrity of the microstructure of the metal fiber felt and porous sintered plate, as well as the surface catalyst coating. Simultaneously, the metal wire mesh filter layer acts as a physical barrier, preventing filter material from detaching and entering the clean air chamber with the gas.

[0014] Each metal filter media layer is fixed into a composite structure by high-temperature sintering and edge welding. The whole structure is hollow tubular, and the four filter media layers are stacked and fixed into a whole from the outside to the inside in the radial direction.

[0015] Furthermore, the filter module can be cylindrical, corrugated, or conical in shape.

[0016] The cylindrical filter module has a regular structure and a smooth inner wall without obvious protrusions. The resistance is uniform when the flue gas flows, which can reduce airflow disturbance and avoid local turbulence that could cause damage to the filter layer.

[0017] The corrugated structure of the corrugated filter module creates uneven folds on the outer surface of the filter tube, which increases the filtration area and the amount of flue gas processed per unit time compared to a cylindrical filter tube of the same diameter. Moreover, the corrugated structure can rectify the airflow and prevent the flue gas from directly impacting the filter tube and causing excessive local filtration load and wear.

[0018] The cone-shaped filter module has a gradually changing diameter from the bottom to the top, which can reduce the damage to the filter tube caused by airflow impact when the flue gas flow rate fluctuates greatly.

[0019] It also includes a dust removal system, which is set in the dust-side chamber or the clean-side chamber to remove the dust layer accumulated on the outer surface of the metal filter tube; the dust removal system is a pulse jet cleaning system, including a pulse valve, an air tank and a jet pipe, with the jet pipe located in the clean-side chamber.

[0020] It also includes a reducing agent injection system, which is installed in the flue between the flue gas inlet and the metal filter tube module, and is used to inject a reducing agent (such as ammonia or urea solution) into the flue gas.

[0021] It also includes a dust hopper, which is located at the bottom of the housing and is used to collect the dust filter cake blown off by the pulse jet cleaning system, as well as the dust that settles in the flue gas due to gravity, so as to prevent dust from accumulating inside the housing.

[0022] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention configures the filtration module of the integrated dust removal and denitrification equipment as a four-layer metal filter composite structure. The first layer, a metal wire mesh filter layer, uses plain-weave wire mesh with different mesh counts, wire diameters, pore sizes, and thicknesses to form an outer, middle, and inner composite structure. This intercepts large dust particles in the flue gas, reduces the flue gas velocity, and minimizes the impact and friction of dust-laden flue gas on the subsequent catalyst layer, preventing the catalyst coating from peeling off during flue gas dust removal and denitrification. The fourth layer, a metal wire mesh filter layer, resists the high-pressure airflow of pulse cleaning, preventing the catalyst coating from peeling off during cleaning. Through this four-layer metal filter composite structure, dust is intercepted step by step, the flue gas velocity is reduced, and catalyst coating peeling is prevented. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 These are different structural diagrams of the catalytic metal filter tube of this utility model.

[0024] Wherein: 1-shell; 2-flue gas inlet; 3-clean gas outlet; 4-ash hopper; 5-filter module; 51-metal filter media filter unit; 6-dust side chamber; 7-clean side chamber; 8-pulse jet cleaning system; 81-pulse valve; 82-air manifold; 83-jet pipe; 9-reducing agent injection system. Detailed Implementation

[0025] To provide a better understanding of the purpose, structure, features, and functions of this utility model, detailed descriptions are provided below with reference to specific embodiments.

[0026] A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings. Example

[0027] like Figure 1 The diagram shown is a structural schematic of this equipment.

[0028] A metal filter material dust and nitrification integrated equipment includes: a housing 1, the housing including a flue gas inlet 2, a clean gas outlet 3 and a filter module 5; flue gas enters through the flue gas inlet 2 and is filtered by the filter module 5 to obtain purified flue gas, and the purified flue gas is discharged through the clean gas outlet 3.

[0029] The filter module 5 divides the interior of the housing into a dust-side chamber 6 that communicates with the flue gas inlet and a clean-side chamber 7 that communicates with the clean gas outlet.

[0030] Filter module 5 is a metal filter unit 51. The metal filter unit 51 is a four-layer filter structure consisting of a metal wire mesh filter layer, a metal porous sintered plate filter layer, a metal fiber felt filter layer, and a metal wire mesh filter layer. According to the order in which the flue gas passes, the metal filter unit is specifically as follows: The first layer is a metal wire mesh filter material layer with a thickness of 1.7mm; The metal wire mesh filter layer is composed of three layers of plain weave wire mesh sintered together: the outer layer uses 24-mesh plain weave wire mesh with a wire diameter of 0.35mm and a pore size of 708μm, forming a layer with a thickness of 0.8mm; the middle layer uses 90-mesh plain weave wire mesh with a wire diameter of 0.11mm, a pore size of 172μm, and a thickness of 0.4mm; and the inner layer uses 300-mesh plain weave wire mesh with a wire diameter of 0.035mm, a pore size of 50μm, and a thickness of 0.3mm.

[0031] The outer layer, composed of a 0.8mm thick plain-weave skeleton made of 24-mesh filaments with a diameter of 0.35mm, provides bending stiffness and withstands the initial impact of dust-laden flue gas. The filaments disperse the impact force through slight elastic deformation, preventing concentrated stress from being transferred to the downstream filter layer. At the same time, it converts the impact kinetic energy into elastic potential energy, reducing the scouring intensity of the airflow on the subsequent filter layer. It blocks coarse particles with a diameter >750μm in the flue gas.

[0032] The middle layer is woven from medium-diameter filaments of 90 mesh with a diameter of 0.11 mm and a pore size of 172 μm, which can capture dust particles larger than 200 μm. Its denser mesh structure further filters out particles that are not intercepted by the outer layer, while dividing the flue gas into finer streams, further dissipating the kinetic energy of the gas flow.

[0033] The inner layer is woven from 300-mesh filaments with a diameter of 0.035mm and a pore size of 50μm, capable of intercepting particles larger than 50μm while further refining the airflow. The resistance gradient of the three-layer mesh forces the flue gas flow to become more uniform, controlling the velocity variation coefficient to below 8%, thereby eliminating the direct and continuous scouring of the second catalytic sintered plate filter material layer by local high-speed jets. This scouring is the key hydrodynamic factor leading to wear and peeling of the surface catalyst coating.

[0034] The three layers of metal mesh filter media feature an increasing mesh count and decreasing pore size from the outermost to the innermost layer. This achieves step-by-step interception of dust particles of different sizes, preventing large particles from directly impacting the subsequent catalyst layer. Furthermore, the reduced pore size increases the resistance to flue gas flow, dissipating its kinetic energy and lowering its velocity, thus preventing high-speed jets from impacting the catalyst coating in the subsequent structure. Simultaneously, the intercepted dust forms a loose dust cake on the outside of the metal mesh filter media, serving as a pre-filtration layer and reducing the risk of clogging in the inner layers.

[0035] The second layer is a porous metal sintered plate filter media layer with a thickness of 4mm; The porous metal sintered plate filter media layer is formed by high-temperature sintering of metal powder particles into a three-dimensional metal framework, possessing advantages such as large specific surface area and strong adhesion. A V2O5-WO3 / TiO2 catalyst coating is applied to the surface and internal pore walls. The catalyst is loaded onto the surface and surface pores of the porous metal sintered plate, ensuring sufficient contact with the flue gas and a more thorough denitrification reaction. When the flue gas passes through this layer, dust is intercepted, while NO... x The NH3 that has permeated into this layer undergoes a reduction reaction on the catalyst surface to become N2. The interior of the porous metal sintered plate filter material layer has a large number of tortuous and interconnected micropores with a pore size of 10-30μm, which can capture dust particles with a particle size of 30-50μm, forming a stable dust layer, which forms a second physical filtration barrier layer to block impurities in the flue gas and improve the flue gas filtration efficiency.

[0036] Metal porous sintered plate filter media layer catalytic reduction of NO x For capturing 30-50μm dust, the thickness needs to match the requirements of the supported catalyst and the stability of the microporous structure. When the thickness is less than 3mm, it is difficult to form sufficient tortuous and interconnected 10-30μm micropores inside, resulting in insufficient catalyst adhesion area. When the thickness is greater than 5mm, it will increase airflow resistance and increase the difficulty of dust removal. The 4mm thickness ensures the structural strength of the three-dimensional metal skeleton of the metal porous sintered plate filter material layer, meeting the requirements of the supported catalyst and the stability of the microporous structure.

[0037] The third layer is a metal fiber felt filter media layer with a thickness of 1.2mm; The metal fiber felt filter layer is made of randomly stacked and sintered micron-sized metal fibers, forming a denser fiber network with a pore size of 2-20 μm, capable of capturing submicron-sized dust particles (PM1.0) that penetrate the first two layers. When the thickness of the metal fiber felt filter layer is less than 1.0 mm, the fiber network is too sparse to intercept submicron-sized dust; when the thickness is greater than 1.5 mm, the micropores of the metal fiber felt filter layer are easily clogged, leading to an increase in the clean air outlet pressure. A metal fiber felt filter layer with a thickness of 1.2 mm meets the requirements for capturing submicron-sized dust while reducing airflow resistance.

[0038] Furthermore, the surface of the metal fibers in the metal fiber felt filter layer is coated with MnO. x -CeO2-based molecular sieve, MnO x - The CeO2-based molecular sieve complements the V2O5-WO3 / TiO2 catalyst in the second layer of porous metal sintered plate filter media, ensuring NO x Deep purification.

[0039] The fourth layer is a metal wire mesh filter layer with a thickness of 1.0 mm; The metal wire mesh filter layer serves as the back pressure support layer. It is made of 12-mesh twill woven metal mesh with a wire diameter of 1.0 mm and a thickness of 1.0 mm.

[0040] Moment of inertia of a single wire section I=πd 4 / 64, where d is the wire diameter. When the wire diameter is 1.0 mm, I is larger, resulting in higher bending stiffness EI (E is the modulus of elasticity). Under the action of a shock wave, the coarse-diameter wire mesh is less prone to elastic instability or plastic deformation, maintaining structural stability and preventing the impact from being concentrated and transmitted to the next layer due to its own deformation. When high-speed airflow enters the mesh of the 12-mesh twill woven metal mesh, expansion, deceleration, and eddy current dissipation occur. Some kinetic energy is converted into turbulent energy and dissipated as heat within the mesh, reducing the airflow pressure and protecting the integrity of the microstructure and surface catalyst coating of the metal fiber felt and porous sintered plate. At the same time, the metal wire mesh filter layer acts as a physical barrier, preventing filter material from falling off and entering the clean air chamber with the gas.

[0041] Each metal filter media layer is fixed into a composite structure by high-temperature sintering and edge welding. The whole structure is hollow tubular, and the four filter media layers are stacked and fixed into a whole from the outside to the inside in the radial direction.

[0042] Furthermore, the filter module 5 is shaped like a cylinder, a corrugated tube, or a cone.

[0043] The cylindrical filter module is chosen for several reasons: firstly, its structure is regular and easy to manufacture, allowing for flexible adaptation to different sizes of housing space and reducing the overall design complexity of the equipment; secondly, its smooth inner wall without obvious protrusions ensures uniform resistance when flue gas flows inside the tube, reducing airflow disturbance and preventing uneven dust accumulation caused by local turbulence; and thirdly, during pulse jet cleaning, the high-pressure airflow can act evenly along the inner wall of the cylinder, quickly stripping the dust layer from the outer surface of the filter tube, reducing dust residue and maintaining the long-term air permeability of the filter tube.

[0044] The use of corrugated tube filter modules serves several purposes: First, the corrugated structure creates uneven folds on the outer surface of the filter tube, increasing the filtration area and improving flue gas treatment efficiency compared to cylindrical filter tubes of the same diameter. Second, the gaps between the folds in the corrugated structure extend the residence time of flue gas on the filter tube surface, increasing the contact opportunity between the flue gas and the catalyst, further improving denitrification efficiency. Third, the corrugated structure can rectify the airflow, preventing the flue gas from directly impacting local areas of the filter tube and causing excessive local filtration load, thus reducing filter tube wear.

[0045] The cone-shaped filter module is selected for two reasons: first, the diameter of the cone structure gradually changes from the bottom to the top, which can reduce the damage to the filter tube caused by airflow impact when the flue gas flow rate fluctuates greatly; second, the inclined surface of the cone facilitates the dust to slide down into the ash hopper under the action of gravity, reducing the accumulation of dust on the surface of the filter tube and reducing the frequency of dust cleaning.

[0046] Furthermore, the filter module is made of sintered metal fibers or porous sintered metal, specifically one or more of stainless steel, iron-aluminum intermetallic compounds, or nickel-based alloys. Stainless steel, iron-aluminum intermetallic compounds, or nickel-based alloys can be drawn into wires (for wire mesh and fibers), made into powder (for sintered plates), and then welded together. They can also operate continuously at 300-500℃, resisting acid dew point corrosion, chlorination corrosion, and oxidation corrosion caused by SO2, SO3, HCl, and alkali metal vapors in flue gas. Furthermore, they maintain sufficient strength and hardness at high temperatures, resisting the impact of cleaning pulses and are not easily deformed.

[0047] It also includes a dust removal system 8, which is located in the clean side cavity and is used to remove the dust layer accumulated on the outer surface of the metal filter tube; Furthermore, the dust removal system 8 is a pulse jet cleaning system, including a pulse valve 81, an air manifold 82, and a jet pipe 83.

[0048] It also includes a reducing agent injection system 9; Furthermore, a reducing agent injection system is installed in the flue between the flue gas inlet and the metal filter module to inject ammonia, a reducing agent, into the flue gas. Ammonia reacts with NO in the flue gas. x The second layer of the filter module contains V2O5-WO3 / TiO2 catalyst or the third layer contains MnO. x- Under the catalytic action of the CeO2-based molecular sieve coating, the reaction generates non-toxic and harmless nitrogen (N2) and water (H2O), purifying gaseous pollutants in the flue gas.

[0049] It also includes a dust hopper 4 located below the housing 1, used to collect the dust filter cake blown off by the pulse jet cleaning system, as well as the dust that settles in the flue gas due to gravity, to prevent dust from accumulating inside the housing.

[0050] Flue gas enters the housing 1 through flue gas inlet 2, passes through the dust-side chamber 6, and then through the filter module 5. Ammonia, the reducing agent, is injected into the inlet flue through the reducing agent injection system 9, where it mixes thoroughly with the flue gas. After being filtered and catalyzed by the filter module 5, the clean gas passes through the clean side chamber 7 and exits from the clean gas outlet 3. When cleaning the dust from the filter module 5, the pulse valve 81 is opened, and compressed air is ejected from the air tank 82 through the blowpipe 83, blowing the dust cake on the outer surface of the filter module in the reverse direction into the ash hopper 4. The blown-off dust is periodically discharged from the ash hopper 4.

[0051] This utility model has been described by the above-described embodiments; however, these embodiments are merely examples for implementing this utility model. It must be noted that the disclosed embodiments do not limit the scope of this utility model. Conversely, any modifications and refinements made without departing from the spirit and scope of this utility model are within the scope of patent protection of this utility model.

Claims

1. A metal filter material dust and nitrification integrated equipment, comprising a housing (1), wherein the housing (1) comprises a flue gas inlet (2), a clean gas outlet (3), and a filter module (5); flue gas enters through the flue gas inlet (2) and is filtered by the filter module to obtain purified flue gas, and the purified flue gas is discharged through the clean gas outlet (3); Its features are: The filtration module is a metal filter unit, which is a four-layer filtration structure consisting of a metal wire mesh filter layer, a metal porous sintered plate filter layer, a metal fiber felt filter layer, and a metal wire mesh filter layer in sequence according to the order in which the flue gas passes. The first layer is a metal wire mesh filter material layer with a thickness of 1.5-2.0 mm; The second layer is a porous metal sintered plate filter media layer with a thickness of 3-5mm; The third layer is a metal fiber felt filter material layer with a thickness of 1.0-1.5mm; The fourth layer is a metal wire mesh filter layer with a thickness of 1.0 mm; The first layer of metal wire mesh filter material is composed of three layers of plain-weave wire mesh sintered together: the outer layer uses 23-24 mesh plain-weave wire mesh with a wire diameter of 0.30-0.40 mm and a pore size of 700-750 μm, forming a layer with a thickness of 0.6-0.95 mm; the middle layer uses 85-94 mesh medium-diameter wire mesh with a wire diameter of 0.10-0.12 mm, a pore size of 150-200 μm, and a thickness of 0.3-0.5 mm; the inner layer uses 299-318 mesh fine wire mesh with a wire diameter of 0.03-0.04 mm, a pore size of 45-50 μm, and a thickness of 0.2-0.35 mm. The fourth layer of metal wire mesh filter material is made of plain or twill woven metal mesh with a mesh count of 8–16 mesh, a wire diameter of 0.8–1.2 mm, and a thickness of 1.0 mm.

2. The equipment according to claim 1, characterized in that: The second layer of the metal porous sintered plate filter material is a three-dimensional metal skeleton formed by high-temperature sintering of metal powder particles; the third layer of the metal fiber felt filter material is a fine fiber network formed by disordered stacking and sintering of micron-level metal fibers.

3. The equipment according to claim 1, characterized in that: The pore size of the metal porous sintered plate filter layer is 10-30μm; the pore size of the metal fiber felt filter layer is 2-20μm.

4. The equipment according to claim 1, characterized in that: The surface and internal pore walls of the porous metal sintered plate filter material layer are coated with a V2O5-WO3 / TiO2 catalyst coating; the surface of the metal fibers of the metal fiber felt filter material layer is sprayed with MnO. x -CeO2-based molecular sieve coating.

5. The equipment according to claim 1, characterized in that: The filter module (5) is cylindrical, corrugated, or conical.

6. The equipment according to claim 1, characterized in that: It also includes a dust removal system (8), which is a pulse jet dust removal system, including a pulse valve (81), an air manifold (82) and a jet pipe (83), the jet pipe (83) being located in the clean side cavity (7).

7. The equipment according to claim 1, characterized in that: It also includes a reducing agent injection system (9), which is installed on the flue of the flue gas inlet (2).

8. The equipment according to claim 1, characterized in that: It also includes an ash hopper (4), which is located below the housing (1).

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