KR20130072570A - Porosity of metal filter media and its producing method - Google Patents

Abstract

PURPOSE: A manufacturing method of functional porous metal filter is provided to reduce the complicated multistage devices and processing stages which required purification and dust collection of exhaust gas of conventional Industrial boiler and watercraft engine to one process with one apparatus. CONSTITUTION: A manufacturing method of functional porous metal filter comprises the following steps. A step of manufacturing slurry with desired bubbles by mixing 50 - 100 parts by weight of metal powder, mixed metal powder, or alloy power, 20 - 50 parts by weight of distilled water, 0.1 - 10 parts by weight of dispersing agent or viscosity modifier, 1 - 15 parts by weight of foaming agent surfactant, 1-30 parts by weight of pore-forming agent, 0.5 - 10 parts by weight of gelling agent and 0.5 - 10 parts by weight of hardener; a step of dipping slurry into a carrier; a step of fundamental molding various sizes of forms and shapes by covering or winding this on the cast; a step of drying the molded product; a step of removing the forms; a step of sintering; a step of processing; and a step of granting functionality according to the feature of product; and a step of manufacturing the complete product. The metal powder, the mixing metal powder or the alloy power is one selected from carbon, iron, nickel, chrome, manganese, titanium, vanadium, bismuth, niobium, zirconium, cobalt, molybdenum, gold, platinum, palladium, silver, copper, arsenic, silicon, aluminum, boron, magnesium, calcium, antimony, sodium, tin, zinc, barium, tungsten, germanium, Ce, La, Te, Yb, Eu, Sm, Sc, Gd, Pr, stainless, Inconel, ferro aluminum, etc.

Description

Porous metal filter and its manufacturing method {Porosity of metal filter media and its producing method}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a high temperature porous metal filter based on metal powder and nonferrous metal powder alloy fine powder. Currently, the present invention relates to a fiber filter dust collector, an electrostatic precipitator, a scrubber, and an SCR (Selective Catalytic Reduction). It is a method to collect and reduce dust and exhaust gas of various pollutant sources and combustion boilers by using nitrogen oxide (NOx) reduction device using catalytic equipment and sulfur oxide (SOx) reduction device using slaked lime in order. Although it is widely applied to various industrial fields for various purposes, the regulation of emission gases such as global warming and ozone depletion is being strengthened internationally. Efficiently regulate the ship's engine exhaust gas in the rear stage due to large vessel environmental regulation This is a time when technology for processing is desperately needed. It is necessary to remove air pollutants in exhaust gas including particulate matter (PM), sulfur oxides (SOx), nitrogen oxides (NOx), etc. generated from various industrial boilers and diesel engine exhaust gases. It is the most important key part of the metal catalyst filter purification reaction system which reduces simultaneously at high temperature.

The present invention relates to a method for producing a high-temperature porous metal carrier on the basis of the fine powder of the metal powder and non-ferrous metal powder alloy powder based on the present invention, in general, in the air environment field, fiber filter dust collector, electric dust collector, scrubber, SCR ( Selective Catalytic Reduction (NOx) reduction equipment using catalytic equipment and sulfur oxide (SOx) reduction equipment using slaked lime are used in order to collect dust and exhaust gas of various pollutants and combustion boilers in order. Although it is widely applied to various industrial fields for various purposes as a method of reducing, such a dust collection equipment is required to manufacture each facility, so the production cost is high, and the area of the facility site is large, and each process is carried out. High costs include increased pressure loss, high power costs, operating costs, and after-sales costs. Let's go. Increasingly, environmental regulations are now being strengthened internationally, such as global warming and ozone depletion. In particular, a large number of industrial boilers are being strengthened, and new and enhanced large vessel environmental regulations are applied to marine engines. This is a time when technology for efficiently and efficiently treating exhaust gas at the lower stage is required. Particulate matter (PM), sulfur oxide (SOx), nitrogen oxide (NOx), etc. generated from industrial boilers and diesel engine exhaust gases are desperately needed. There is an urgent need for the development of facilities and core parts that can solve many problems, such as reducing the process, manufacturing facilities at low cost, and reducing operating costs due to low pressure loss.

In order to solve the problems of the prior art as described above, the present invention is to make a fine powder metal powder and non-ferrous metal powder alloy powder and to make a functional high-temperature porous metal carrier based on the exhaust gas purification and dust collection of conventional industrial boilers and marine engines As the complicated and multi-stage equipment and process steps required can be reduced to a single process, the exhaust gas purification and dust collection system can be easily decorated, thereby reducing the production cost of the exhaust gas purification system and the exhaust gas dust removing equipment, Low pressure loss is expected to reduce operating cost, maintenance cost, and after-sales cost, etc., and it is possible to efficiently use various industrial boiler aftertreatment sites and install by optimal design production from inside of limited space ship. It is possible to install each process by the difference between dust collection temperature and exhaust gas treatment temperature. The development of a functional high-temperature porous metal catalyst filter provides a metal catalyst for simultaneous reduction of particulate matter (PM), sulfur oxides (SOx), and nitrogen oxides (NOx) from various industrial boilers and marine engine exhaust gases. It is an object of the present invention to provide a key component to an integrated dust collecting device at a high temperature using a filter.

In order to achieve the above object,

The present invention is used as a metal or non-ferrous metal, alloy to achieve the above object for the production of functional high-temperature porous metal carrier on the basis of the powder powder of metal powder and non-ferrous metal powder alloy powder fine powder 0.001㎛ ~ 1㎜ 50 to 100 parts by weight of metal powder or nonferrous metal powder, alloy powder, 20 to 50 parts by weight of distilled water to hot water, 0.1 to 10 parts by weight of dispersant or viscosity modifier, 1 to 15 parts by weight of foaming agent to surfactant, and pore-forming agent 1 to 30 parts by weight, 0.5 to 10 parts by weight of a gelling agent and 0.5 to 10 parts by weight of a curing agent are mixed to prepare a slurry having a desired bubble, and the prepared slurry is made of a metal net, urethane foam, net net, woven fabric, nonwoven fabric, or the like. It is supported on a carrier of various materials having the shape of, and a slurry containing bubbles is supported on the carrier to obtain a semi-finished product by drying and sintering. (B) covering the carrier on which the slurry is supported on the mold, or winding it to form a foundation of various sizes and shapes, and drying the molded article made of the basic molding, and sintering the dried molded article from the inner mold and sintering the basic molded article. A method for manufacturing a functional porous metal filter comprising the steps of processing a molded product after sintering in various ways to produce a rough product by assembling and assembling a rough semi-finished product sequentially or repeatedly until a step of imparting functionality according to product characteristics. To provide.

The metal powder and the nonferrous metal powder alloy powder of the present invention are made into fine powder, and a functional high temperature porous metal carrier is used as the basis for the complex multi-stage apparatus and process steps required for exhaust gas purification and dust collection of a conventional industrial boiler and marine engine. The device can be reduced to the process.

Looking at this in detail the effect;

-. Prevents filter damage from embers generated during the process and is safe from fire.

-. It has the advantages of durability, wear resistance, etc. and ensures safe driving.

-. Easily decorate the exhaust gas purification and dust collection system,

-. The production cost of the exhaust gas purification device and the exhaust gas dust removing equipment can be reduced.

-. Low pressure loss reduces operating costs, maintenance costs, and after-sales costs.

-. Efficient use of the site of various industrial boiler aftertreatment facilities and installation by optimal design from inside the vessel in a limited space increases the space efficiency, and each process must be installed due to the difference between dust collection temperature and exhaust gas treatment temperature. Metal catalyst filter for simultaneous reduction of particulate matter (PM), sulfur oxides (SOx), and nitrogen oxides (NOx) generated from various industrial boilers and marine engine exhaust gases through the development of functional high temperature porous metal catalyst filter In order to provide the core parts to the integrated dust collector and the high temperature using the high temperature porous metal carrier as a catalyst filter at the same time to reduce the characteristics of the industrial boiler and marine engine exhaust gas to obtain a simple and effective effect Provides the core components of the metal catalyst filter dust purification device.

The present invention uses the metal powder and the non-ferrous metal powder as a basic raw material for the production method of the functional porous metal filter to achieve the object;

a),) Carbon (C), Iron (Fe, Ferrum), Nickel (Ni, Nickel), Chromium (Cr, Chromium), Manganese (Mn, Manganese), Titanium (Ti, Titanium), Vanadium (V, Vanadium, Bi, Bismuth, Niobium (Nb, Niobium), Zirconium (Zr, Zirconium), Cobalt (Co, Cobait), Molybdenum (Mo, molybdenum), Gold (Au, Gold), Platinum (Pt, Platinum ), Palladium (Pd, Palladium), Silver (Ag, Silver), Copper (Cu, Copper), Arsenic (As, Arsenic), Silicon (Si, Silicon), Aluminum (Al, Aluminum), Boron (B, Boron) , Magnesium (Mg, Magnesium), calcium (Ca, Calcium), antimony (Sb, Antimony), sodium (Na, Sodium), tin (Sn, Tin), zinc (Zn, Zinc), barium (Ba, Barium), Tungsten (W, Tungsten), Germanium (Ge, Germanium), Ce (Cerium), La (Lanthanum), Te (Tellurium), Yb (Ytterbium), Eu (Europium), Sm (Samarium), Sc (Scandium), Gd (Gadolinium), Pr (Praseodymium), Stainless (Intainel), Inconel (Ferro Aluminum Alloy), etc. selected from 1 to 2 or more types of powder selected from each other May be used as a basic raw material to 50 to 100 parts by weight of metallic powder to mix the metal powder, alloy powder has a weight ratio;

Ii) 20 to 50 parts by weight of distilled water to hot water in the liquid;

Iii) 0.1 to 10 parts by weight of a dispersant or viscosity modifier;

Iii) 1 to 15 parts by weight of the foaming agent to the surfactant;

Iii) 1 to 30 parts by weight of pore-forming agent;

Viii) 0.5 to 10 parts by weight of a gelling agent;

Iii) 0.5 to 10 parts by weight of a curing agent;

Mixing to prepare a slurry having a desired bubble;

b) supporting the slurry prepared in step a) on a carrier of various materials having the shape of a metal net, urethane foam, net net, woven fabric, nonwoven fabric, or the like;

c) supporting the slurry containing bubbles in the carrier in the step b), covering them on a frame, or winding them, to form bases of various sizes and shapes;

d) drying the molding from which the basic molding is made in step c);

e) demolding the molding dried in step d) from an inner mold;

f) sintering the base molding demolded in step e);

g) processing the molded article sintered in the step f) by various methods;

h) imparting functionality according to product characteristics after steps f) to g);

i) making a rough semi-finished product by assembling the sequential or necessary process from step a) to step h) and assembling the finished product;

It provides a method for producing a functional porous metal filter comprising a. The present invention also provides a functional porous metal filter produced by the above method.

Hereinafter, the present invention will be described in detail.

a) Bubble slurry preparation.

In this step, carbon (C), iron (Fe, Ferrum), nickel (Ni, Nickel), chromium (Cr, Chromium), manganese (Mn, Manganese), titanium (Ti, Titanium) and vanadium (V) , Vanadium, Bi, Bismuth, Niobium (Nb, Niobium), Zirconium (Zr, Zirconium), Cobalt (Co, Cobait), Molybdenum (Mo, molybdenum), Gold (Au, Gold), Platinum (Pt, Platinum), Palladium (Pd, Palladium), Silver (Ag, Silver), Copper (Cu, Copper), Arsenic (As, Arsenic), Silicon (Si, Silicon), Aluminum (Al, Aluminum), Boron (B, Boron ), Magnesium (Mg, Magnesium), calcium (Ca, Calcium), antimony (Sb, Antimony), sodium (Na, Sodium), tin (Sn, Tin), zinc (Zn, Zinc), barium (Ba, Barium) , Tungsten (W, Tungsten), Germanium (Ge, Germanium), Ce (Cerium), La (Lanthanum), Te (Tellurium), Yb (Ytterbium), Eu (Europium), Sm (Samarium), Sc (Scandium), Select one or more powders selected from Gd (Gadolinium), Pr (Praseodymium), Stainless, Inconel, Ferro Aluminum Alloy, etc. 50 to 100 parts by weight of metal powder, mixed metal powder and alloy powder can be used as the basic raw materials, and ii) 20 to 50 parts by weight of distilled water to hot water in the liquid, i) 0.1 to 10 Parts by weight, i) 1 to 15 parts by weight of foaming agent to surfactant, i) 1 to 30 parts by weight of pore forming agent, i) 0.5 to 10 parts by weight of gelling agent, and i) 0.5 to 10 parts by weight of curing agent. It is a step of preparing a slurry with bubbles.

The metal powder to alloy powder of i) used in the present invention serves as a support for the functional porous metal filter as a component constituting the basic structure of the metal filter after sintering.

The metal powder to the alloy powder of iii) may use materials having various particle sizes, and may be mixed and used with different materials and particle sizes. In particular, it is effective to improve pore size, pore shape, mechanical strength, and functionality by selectively using a particle size powder of 0.001㎛ to 1mm.

The metal powder to the alloy powder of iii) is included in the bubble slurry composition in an amount of 50 to 100 parts by weight, more preferably in an amount of 90 to 100 parts by weight to maintain the physical strength and shape of the metal filter, and to prevent distortion and cracking after sintering. It can prevent and increase the collection efficiency and durability of the metal filter.

Ii) alcohol, benzene, toluene, distilled water, hot water, liquid mixed with other necessary functions and uses, which can make metal powder or alloy powder of iii) into a bubble slurry in the liquid, preferably warm hot water (30 ~ 80 ℃) 20 to 50 parts by weight to facilitate the mixing of the other additives and to help the bubble slurry activity.

Iii) the dispersant or viscosity modifier is to maintain the distance between the raw material particles in the process of mixing with different materials and particle size of the metal powder or alloy powder to prevent agglomeration of the slurry and to disperse, thereby creating bubbles in the slurry It is added to make possible, wherein the viscosity modifier is preferably selected from the use of sodium hexametaphosphate (sodium hexametaphosphate), sodium polyacrylate (sodium polyacrylate), ammonium polyacrylate, polyethyeneimine Add 0.5 to 3 parts by weight.

(Iii) The foaming agent to the surfactant includes all species of anionic surfactants and cationic surfactants having 10 to 17 carbon atoms in the hydrophobic group, and includes foams including functional powder detergents and gel foaming agents to which the surfactant is added. One suitable for the property is selected and preferably 1 to 5 parts by weight is added.

Iii) the pore-forming agent is used to make carbon, activated carbon, wood powder, sawdust, salt, naphthalene, talc, various grains, etc. into fine powder, preferably pore-forming agent having a particle size of 0.001㎛ to 1㎜ There is an effect of increasing the properties and the specific surface area of the filter, more preferably 3 to 15 parts by weight is added.

Iii) The gelling agent maintains the desired conditions such as bubble generation amount, bubble size, bubble density, etc. in the process of making and mixing bubble slurry to obtain desired bubble properties, and select various types of Exposi resin as the gelling agent. And preferably 1.5 to 5 parts by weight is added.

Iii) The curing agent is different depending on the conditions of use, such as pot life, viscosity, curing temperature, curing time, exotherm, etc. when the cured product is mixed, tertiary amines, Diethylene Triamine, Diethyl amino propylamine, Phthalic acid anhydride, Modifide Examine the workability and performance of the mixture with the selection of epoxy resins such as Aliphatic amine, Aromatic amine, Phthalic anhydride, Polyamide resin, Polysulfide resin, Phenol resin, Polyethyleneimine, and select the curing agent, preferably add 0.5 to 7 parts by weight. .

b) Supporting the bubble slurry on a carrier of various materials.

This step is a step of supporting the slurry prepared in step a) on a carrier of various materials having the shape of a metal net, urethane foam, net net, woven fabric, nonwoven fabric in step b). The carrier used in the present invention can cut the size and thickness and shape of the carrier according to the size, thickness, shape, etc. of the metal filter to be manufactured, rolls of various materials according to the characteristics of the metal filter manufacturing method (Roll) You can do that.

The carrier may be any porous structure capable of supporting a slurry, and in particular, it is more preferable to use a metal mesh, a urethane foam, a mesh net, a woven fabric, a nonwoven fabric, etc. to increase the ease of application.

The woven fabric in the carrier is manufactured by spinning, weaving, cotton, etc. It is preferable that the loose tissue capable of supporting the bubble slurry by a variety of manufacturing methods such as weft, warp yarn, weaving, weaving, weaving, such as natural fibers, chemical fibers, This includes all materials such as paper, plastics, synthetic resins, metals and nonferrous metals.

In the carrier, the nonwoven fabric combines short fibers with an adhesive based on a web or sheet-like aggregate of fibers, bonds fibers between thermoplastic fibers, needle punching, water punching, and sewing. It is a form made of a certain thickness layer without weft and warp by intertwining the fibers, etc., and includes all materials such as chemical fibers, natural fibers, glass fibers, inorganic (ceramic) fibers, and metal fibers.

The supporting step of this step can be used by applying, depositing, or spraying (spraying) the slurry onto the carrier, and in the method of applying the carrier to the carrier, the coating amount, thickness, and density using a blade (blade method) or a roller. In the method of precipitation, the carrier is welded, glued, fused, sewn, self-bonded, etc. to form a desired shape, and the precipitate is deposited on a slurry, and the slurry is applied to a vibrator or other auxiliary equipment. It is supported so that it can be seated on the carrier, and in the spraying (spraying) method, the bubble to foam of the bubble slurry is maintained, and it is supported so that it can penetrate into the upper part or inside of the carrier. In particular, the carrier may be repeatedly carried by the above method so that a sufficient bubble slurry can be supported on the carrier.

c) Foundation molding of shapes and forms of various sizes.

In this step, a slurry containing bubbles is supported on a carrier, and a base inner frame is formed in order to obtain a desired shape of the final product, and the carrier is cut to a size suitable for the inner frame size, or a carrier in a roll form is continuously By carrying out the slurry and using it, various shapes of inner frame can be made and molded into products of desired shape such as round tube, square tube, polygonal tube, and flat plate so that the width, length, height, thickness and weight can be adjusted. , Covering the carrier on which the slurry is supported on the frame, or winding the carrier based on the shape and shape of the various sizes, by further performing the step of forming a shape suitable for the purpose, to form a molded article of a certain shape have.

d) molding drying.

This step is the bubble slurry produced by mixing in step a) is supported on the carrier in step b) and molded in the desired shape in step c) and dried to prevent cracks and deformation of the moldings that may occur during the sintering process. For this purpose, there are hot air drying, daylight drying, natural drying, shade drying, infrared drying, etc., and it is important to select the drying method suitable for the drying characteristics of the product and to maintain the appropriate humidity. In this case, preferably, the temperature is adjusted to 40-120 ° C., air flow, and humidity by hot air drying to shorten the drying time, prevent deformation of the molding, and dry without cracking.

e) demolding from the mold inner mold.

This step is a step of demolding the molded product dried in the step d) in the state that the minimum physical force is applied, the minimum physical force to the molding by reference design as shown in Figure 2 the structure of the inner frame with a favorable demoulding structure In this applied state, the molding and the inner mold are separated, and an intermediate film is placed between the inner mold and the molding for the purpose of smooth demolding to assist in the demolding, and the form of the molding which may occur in the sinter preparation process and the sintering process The yield can be increased from deformation, collapse and cracking.

f) sintering moldings.

In this step, the porous metal filter is carried out by the step of supporting the bubble slurry on the carrier selected from the various materials in step b) and the drying process carried out in the step d), followed by sintering the dried product carried by the bubble slurry on the carrier in step f). Can be produced in roll or plate form, and in step e), the molded article is demolded with minimal physical force applied to the sintering furnace. , Oxygen and other various atmosphere gases can be used, and the sintering can be performed by setting an appropriate sintering temperature, and in particular, to prevent deformation, cracking, and damage of the supporting materials and moldings that may occur during the temperature raising process. It is preferable to heat up at a speed | rate of 0.1-2 degree-C / min to room temperature-300 degreeC, and to heat up at a speed | rate of 1-3 degree-C / min up to 300-500 degreeC This is preferable, and finally, the sintering temperature and the holding temperature are determined according to the composition of the metal powder, the nonferrous metal powder, and the alloy powder to complete the sintering of the molded product.

g) Processing of the molded product after sintering is completed.

In the step f), after the sintering process in step f), the molded product can be cut to the desired size, and surface roughness, straightness, and air permeability can be increased through surface processing. If you want to use, you can bend, weld according to the process and add shape processing for your application.

It is a process to make products that are completed by easy installation or handling of products, or increase the merchandise or processing of lower cap, upper cap and venturi.

h) product characteristics and functionality.

This step is to improve the properties and functionality of the product after the steps e), f), g) step to add additional catalyst to the inside or outside of the metal filter for the purpose of exhaust gas treatment, in particular nitrogen oxides (NOx) Supports the SCR catalyst for the purpose of treatment and functions as shown in FIG. 3, and it supports the function of reducing the particulate matter and the exhaust gas simultaneously by supporting the secondary catalyst for the treatment of volatile organic compounds (VOC's) and other exhaust gases. You can give it.

i) Assemble the semifinished product to complete it.

This step is a normal semi-finished product that passed the quality inspection without any defect or defect until the step h) to the product having various shapes and shapes assembling the upper cap, the lower cap, and the venturi as a product suitable for the user's use. Complete The upper cap, the lower cap, venturi, and the like, including rubber, urethane, and plastics used below 150 ° C, and below 350 ° C, aluminum and various alloys including the same may be used. Preferably, mass production is possible. After aluminum die-casting, Teflon coating or ceramic coating solves the problem of high temperature corrosion and improves the quality.

Hereinafter, preferred examples are provided to help understanding of the present invention, but the following examples are merely to illustrate the present invention, and the scope of the present invention is not limited to the following examples.

Example 1.

The mixer used in the process of preparing the bubble slurry should be capable of controlling the rotational speed and the shape of the mixing blade should be interchangeable.

①. Making a bubble slurry;

Add 100 parts by weight of nickel metal powder, 30 parts by weight of hot water, 5 parts by weight of viscosity modifier to the mixer, and sufficiently mix at a high speed of 1000 rpm, add foaming agent to 2.5 parts by weight of surfactant and 2 parts by weight of pore-forming agent, and foam at a constant speed. Mix 3 parts by weight of the gelling agent slowly and slowly at twice the volume of the metered volume with a blade that causes

1.5 parts by weight of the curing agent is added and mixed with the carrier and the preparations for working to prepare a bubble slurry for producing a porous metal filter.

②. Supporting and shaping the bubble slurry on a carrier;

The carrier was selected as a nonwoven fabric having a weight of 150 g / m 3 of fiber material and a roll width of 1,200 mm. The bubble slurry mixed in the carrier nonwoven fabric thus selected is supported by a doctor braid on the carrier with the bubble slurry on the carrier in roll form, 1,100 mm and 1 mm thick, as shown in FIG. 1 and 3 times as shown in FIG. Samples were prepared by winding five, seven, nine and twelve times.

③. Drying and demolding the molded article carrying the bubble slurry;

The prepared sample is completely dried in a drying room with hot air at about 50 to 60 ° C for about 12 hours, and the fully dried sample is cooled again at -5 to -1 ° C for 2 hours to remove the internal mold well, and then the expanded inside The mold contracts to allow the demolding to proceed smoothly.

④. Sintering after drying and demolding;

After the bubble slurry is supported on the selected carrier among various materials and dried, the demolded molded product is put into the sintering furnace under the minimum physical force applied, and then nitrogen, hydrogen in the sintering process according to the composition and ratio of the base material. , Oxygen and other various atmosphere gases can be used, and the sintering can be performed by setting an appropriate sintering temperature, and in particular, to prevent deformation, cracking, and damage of the supporting materials and moldings that may occur during the temperature raising process. It is preferable to raise the temperature at a rate of 0.1 to 2 ° C./min from room temperature to 300 ° C., and to raise the temperature to 300 to 500 ° C. at a rate of 1 to 3 ° C./min. Finally, metal powder, nonferrous metal powder, and alloy powder According to the composition of the sintering temperature, the holding temperature is determined and the molded product is finished sintering as shown in FIG.

⑤. The rest of the process can be further carried out as needed.

Example 2.

①. Making a bubble slurry;

60 parts by weight of aluminum (Al) metal powder, 50 parts by weight of iron (Fe) metal powder, 30 parts by weight of hot water, and 5 parts by weight of viscosity modifier were added to the mixer, and the mixture was sufficiently mixed at a high speed of 1000 to 2000 rpm. By weight, 2 parts by weight of pore-forming agent is added, and 3 parts by weight of the gelling agent is gradually mixed sufficiently at a volume twice the weighing volume on a blade that foams at a constant rate.

1.5 parts by weight of the curing agent is added and mixed with the carrier and the preparations for working to prepare a bubble slurry for producing a porous metal filter.

②. Supporting and shaping the bubble slurry on a carrier;

The carrier was made of stainless steel 100 mesh woven fabric in the form of a roll and a width of 920 mm. The bubble slurry mixed with the selected stainless steel carrier fabric is braided to form a foam slurry on the carrier in the form of a roll and a sheet of 1000 mm in length. The width is 920 mm and the thickness is 1 mm according to the width of the carrier. It is possible to carry and dry it by connecting it to a continuous drying furnace, and to sinter by connecting the dried carrier to a sintering furnace to increase the yield and production rate through a continuous process.

④. Sintering after drying and demolding;

The porous metal filter can be produced in roll or plate form through the process of supporting the bubble slurry on a selected carrier among various materials and sintering through a drying process, and nitrogen in the sintering process depending on the composition and ratio of the base material. , Hydrogen, oxygen and other various atmosphere gases can be used, and sintering can be performed by setting an appropriate sintering temperature, and in particular, it is possible to prevent deformation, cracking and damage of the supporting materials and moldings that may occur during the temperature raising process. It is preferable to raise the temperature at a rate of 0.1 to 2 ℃ / min from room temperature to 300 ℃, and to increase the temperature at a rate of 1 to 3 ℃ / min to 300 to 500 ℃, finally, metal powder, non-ferrous metal powder, According to the composition of the alloy powder, the sintering temperature and the holding temperature are determined, and the molded product is sintered to have a structure as shown in FIG. 4.

⑤. Machining the finished product after sintering.

After the sintering process, the molded product can be cut to the desired size, and surface roughness, straightness, and air permeability can be increased through surface processing. If you want to use a porous metal filter fabric produced in roll or plate shape, By bending and welding, it is possible to add the shape processing for the purpose.

It is a process of making products that are completed by easy installation or handling of products, or improving the merchandise or processing of lower cap, upper cap, venturi, etc.

⑥. The rest of the process can be further carried out as needed.

Example 3.

①. Making a bubble slurry;

60 parts by weight of aluminum (Al) metal powder, 50 parts by weight of copper (Cu) metal powder, 50 parts by weight of zinc (Zn) metal powder, 30 parts by weight of hot water, 5 parts by weight of viscosity modifier, and a high speed of 1000 to 2000 rpm. 3 parts by weight of the foaming agent to the surfactant and 1 part by weight of the pore-forming agent are added, and 2.5 parts by weight of the gelling agent is slowly sufficiently mixed at a volume of 1.5 times the weighing volume on the day of foaming at a constant speed.

2 parts by weight of the curing agent is added and mixed with the carrier and the preparations for working to prepare a bubble slurry for preparing the porous metal filter carrier.

②. Supporting and shaping the bubble slurry on a carrier;

The carrier was selected as a sheet form of a 100 cell urethane material, having a width of 500 mm, a length of 500 mm, and a height of 50 mm. The foam slurry mixed with the urethane carrier selected in this way is supported in the carrier by precipitation method, and dried by connecting it to the continuous drying furnace, and the dried carrier is sintered by connecting to the sintering furnace to have characteristics and bubble slurry of the urethane foam. With the characteristics, it is possible to secure the pores and interconnected pores, thereby obtaining a porous metal filter structure.

④. Sintering after drying and demolding;

The porous metal filter can be produced in the form of a plate with a thickness through a process of supporting the bubble slurry on a selected carrier among various materials and sintering through a drying process, and nitrogen, hydrogen in the sintering process according to the composition and ratio of the base material. , Oxygen and other various atmosphere gases can be used, and the sintering can be performed by setting an appropriate sintering temperature, and in particular, to prevent deformation, cracking, and damage of the supporting materials and moldings that may occur during the temperature raising process. It is preferable to raise the temperature at a rate of 0.1 to 2 ° C./min from room temperature to 300 ° C., and to raise the temperature to 300 to 500 ° C. at a rate of 1 to 3 ° C./min. Finally, metal powder, nonferrous metal powder, and alloy powder According to the composition of the sintering temperature, the holding temperature is determined and the molding is finished sintering.

⑤. Product characteristics and functionality.

As a step to improve the characteristics and functionality of the product, it is possible to additionally support the catalyst inside or outside the metal filter for the purpose of exhaust gas treatment.In particular, it supports SCR catalyst for the purpose of treating NOx, and particulate matter and NOx. ) Can be imparted with the same function as in FIG. 3.

⑥. The rest of the process can be further carried out as needed.

The present invention described above is not limited to the above-described embodiment and the accompanying drawings, and various modifications and changes made by those skilled in the art without departing from the spirit and scope of the present invention described in the claims below. Changes are also included within the scope of the invention.

1 is a schematic diagram of supporting a bubble slurry on a carrier using the braid method of the present invention.

Figure 2 is a schematic diagram of the carrier on which the bubble slurry of the present invention is supported using an inner mold.

3 is a schematic flowchart of simultaneously reducing metal filter particulate matter and exhaust gas produced by the method of manufacturing a porous metal filter of the present invention.

Figure 4 is a SEM photograph of the pores of the metal filter produced by the method of manufacturing a porous metal filter of the present invention.

Figure 5 is a (a), (b), (c) is a photograph showing the shape of a general filter that can be manufactured using the product and the material produced by the method of manufacturing a porous metal filter of the present invention.

[Description of Symbols]

100: bubble slurry 130: coated slurry

150: bubble slurry supported molding

300: carriers of various materials (mesh net, urethane foam, woven fabric, nonwoven fabric)

330: intermediate film

500: inner frame (aluminum bar) 510: inner frame fixing pin

700: blades containing blades 730: vibrator

930 or 950: Demonstrated by applying force in the direction of the arrow.

Claims (8)

The present invention uses the metal powder and the non-ferrous metal powder as a basic raw material for the production method of the functional porous metal filter to achieve the object; a),) Carbon (C), Iron (Fe, Ferrum), Nickel (Ni, Nickel), Chromium (Cr, Chromium), Manganese (Mn, Manganese), Titanium (Ti, Titanium), Vanadium (V, Vanadium, Bi, Bismuth, Niobium (Nb, Niobium), Zirconium (Zr, Zirconium), Cobalt (Co, Cobait), Molybdenum (Mo, molybdenum), Gold (Au, Gold), Platinum (Pt, Platinum ), Palladium (Pd, Palladium), Silver (Ag, Silver), Copper (Cu, Copper), Arsenic (As, Arsenic), Silicon (Si, Silicon), Aluminum (Al, Aluminum), Boron (B, Boron) , Magnesium (Mg, Magnesium), calcium (Ca, Calcium), antimony (Sb, Antimony), sodium (Na, Sodium), tin (Sn, Tin), zinc (Zn, Zinc), barium (Ba, Barium), Tungsten (W, Tungsten), Germanium (Ge, Germanium), Ce (Cerium), La (Lanthanum), Te (Tellurium), Yb (Ytterbium), Eu (Europium), Sm (Samarium), Sc (Scandium), Gd (Gadolinium), Pr (Praseodymium), Stainless (Intainel), Inconel, Ferro Aluminum Alloy, etc. Select one or two or more powders selected from each other to match the characteristics Has a weight ratio of 50 to 100 parts by weight of the metal powder, mixed metal powder, alloy powder can be used as the base material; Ii) 20 to 50 parts by weight of distilled water to hot water in the liquid; Iii) 0.1 to 10 parts by weight of a dispersant or viscosity modifier; Iii) 1 to 15 parts by weight of the foaming agent to the surfactant; Iii) 1 to 30 parts by weight of pore-forming agent; Viii) 0.5 to 10 parts by weight of a gelling agent; Iii) 0.5 to 10 parts by weight of a curing agent; Mixing to prepare a slurry having a desired bubble; b) supporting the slurry prepared in step a) on a carrier of various materials having the shape of a metal net, urethane foam, net net, woven fabric, nonwoven fabric, or the like; c) supporting the slurry containing bubbles in the carrier in the step b), covering them on a frame, or winding them, to form bases of various sizes and shapes; d) drying the molding from which the basic molding is made in step c); e) demolding the molding dried in step d) from an inner mold; f) sintering the base molding demolded in step e); g) processing the molded article sintered in the step f) by various methods; h) imparting functionality according to product characteristics after steps f) to g); i) making a rough semi-finished product by assembling the sequential or necessary process from step a) to step h) and assembling the finished product; Method for producing a functional porous metal filter comprising a. The method of claim 1, A) step 1) to select one or two or more powders selected from metal powder, non-ferrous metal powder, alloy powder to have a weight ratio suitable to each other and mix them as a base material to prepare a slurry having a desired bubble Method for producing a porous metal filter, characterized in that. The method of claim 1, Characterized in that the slurry prepared in step a) is supported on a carrier of various materials having a shape as in the details for carrying out the invention of the metal net, urethane foam, net net, woven fabric, nonwoven fabric, etc. in step b). Method for producing a porous metal filter. The method according to claim 1 or In the step b) by supporting the slurry containing the bubble on the carrier in step c) or cover it on the frame, or wound in the form of a porous metal filter, characterized in that the basic molding as shown in Example 1 in the shape and shape of various sizes Manufacturing method. The method according to claim 1 or The method of manufacturing a porous metal filter, characterized in that the molded article dried in step d), e) by applying a force to both sides from the inner frame as shown in Figure 2 in step f). The method according to claim 1 or The slurry prepared in step a) is supported on a carrier of various materials having a shape as in the specific details for the practice of the invention, such as metal mesh, urethane foam, mesh, woven fabric, nonwoven fabric in step b), c), Apart from the steps d) and e), the sintering is characterized by the general sintering method and the atmosphere sintering such as nitrogen, hydrogen, argon, etc. in step f), as shown in FIG. 1. Method for producing a filter. The method according to claim 1 or After step e), f) and g), step h) sprays and precipitates various catalysts for the purpose of using VOC's catalyst, Selective Catalytic Reduction (SCR) catalyst, H ₂ S reduction, etc. according to product characteristics. Method for producing a porous metal filter, characterized in that to impart functionality by the method. The method according to claim 1 or 2, 3, 4, 5, 6, or 7, The present invention describing the method of manufacturing the porous metal filter is not limited by the above-described embodiment and the accompanying drawings for the purpose of effective function and treatment for various industrial boiler and marine engine exhaust gas aftertreatment, and the following claims Various modifications and changes made by those skilled in the art without departing from the spirit and scope of the present invention described herein are also included within the scope of the present invention.

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