50 results about "Ceramic honeycomb" patented technology

A method of making a ceramic honeycomb wall-flow filter substrate supporting an on-wall coating, a fragment of which on-wall coated filter substrate analysed by mercury porosimetry has a volume of pores of 005 to 0.5 µm diameter as a percentage of a mercury intrusion volume of the fragment of at least 15.0%, comprises the steps of: (i) preparing a slurry comprising water, a carboxylic acid, inorganic oxide particles or a mixture of two or more inorganic oxide particles having a D(v, 0.9) of 8 to 20 µm; and 10 to 35 % by weight relative to 100% weight of the inorganic oxide particles of a particulate insoluble cellulose pore former of non-uniform morphology and having an equivalent spherical diameter D(v, 0.5) of 0.5 to 14 µm and a modal aspect ratio (width / length) of 0.3 to 0.9; (ii) coating the slurry on at least first channels of the substrate, wherein the substrate has a mean pore size (D50) of 6 to 15 µm prior to any coating and a porosity less than 60% prior to any coating; and (iii) drying and calcining the slurry-coated substrate, whereby sufficient slurry is coated on the substrate so that the product of step (iii) has a coating loading of 0.07 to 0.4 g / in3 (4.3 to 24.4 g / L), relative to a substrate weight prior to step (ii) and wherein a mean average on- wall coating thickness of the coated substrate is 5 to 70 µm.

The present invention provides an SCR catalyst and a preparation method therefor and a use thereof. The SCR catalyst comprises a flow-through ceramic honeycomb carrier and a first coating layer. The first coating layer is coated on the pore channel surface of the flow-through ceramic honeycomb carrier. The first coating layer comprises a Mn / Cu-SSZ type first molecular sieve, a cerium oxide, an aluminum oxide, and a manganese oxide. The preparation method for the modified SCR catalyst provided by the present invention has a simple process. After being hydrothermally aged at 800°C, the obtained catalyst still has excellent denitration performance in a low temperature range of 150-200°C without losing denitration performance in a medium-high temperature range of 250-500°C. The catalyst can achieve good NOx conversion over a wider operating temperature window.

Ceramic honeycomb bodies and methods for their manufacture are provided. The ceramic honeycomb body comprises a bulk density of less than 210 g / L, a geometric surface area (GSA) greater than 93 in−1 (3.66 mm−1), a mechanical integrity factor (MIF) greater than 0.28%, and a back pressure factor (BPF) greater than 0.4 mm2.

This invention discloses a carbon capture article comprising: (i) a ceramic honeycomb assembly including an inlet end, an outlet end, and intersecting walls defining cells through which fluid can flow; (ii) a zeolite coating at least partially covering the intersecting walls of the ceramic honeycomb assembly; and (iii) a silicone resin coating at least partially disposed on the zeolite coating. The zeolite coating may be a 13-X type zeolite. The silicone resin may be a siloxane resin. This invention also discloses a method for manufacturing the carbon capture article, the method comprising a silicone coating step, the silicone coating step comprising coating a silicone resin at least partially onto the zeolite coating to form the carbon capture article, the zeolite coating at least partially covering the intersecting walls of the ceramic honeycomb assembly. Finally, this invention discloses a method for capturing carbon dioxide from the air, the method comprising a flow step, the flow step comprising passing a fluid containing carbon dioxide (CO2) molecules through the carbon capture article.

This utility model discloses a hollow high-strength ceramic tile, relating to the field of ceramic tiles, including an upper surface layer and a lower surface layer; an intermediate support mechanism connecting the upper and lower surface layers, the intermediate support mechanism being configured in a honeycomb shape; a surrounding plate fixed to the outside of the intermediate support mechanism, a connecting block fixedly connected to one side of the surrounding plate, and a connecting groove opened on the other side of the surrounding plate, the connecting block and the connecting groove being positioned correspondingly; the intermediate support mechanism being configured in a honeycomb shape, the intermediate support mechanism being high-alumina ceramic or zirconia toughened ceramic, the honeycomb structure not only reduces the overall weight of the tile, but also provides sufficient strength and stability, while providing space for the filling of lightweight heat insulation material, further improving the heat insulation performance of the tile, and the geometry of the honeycomb structure can effectively disperse stress, providing high strength and good compressive strength.

The utility model provides a diesel engine catalysis structure and belongs to the field of tail gas treatment. Comprising a shell and a catalyst installation opening, a catalytic unit is installed in the catalyst installation opening in a matched mode, and the catalytic unit comprises a supporting frame which abuts against rectangular installation openings arranged in parallel at equal intervals; the flat disc ceramic honeycomb carrier is installed in the rectangular installation opening through a handle in a drawing mode, and the height of the air inlet ends of honeycomb holes of the flat disc ceramic honeycomb carrier is larger than that of the air outlet ends of the honeycomb holes of the flat disc ceramic honeycomb carrier; the baffle is arranged between every two adjacent flat disc ceramic honeycomb carriers and fixedly connected with the supporting frame, and slag discharging holes are evenly formed in the positions, on the two sides of the porous baffle, of the bottom side of the supporting frame. According to the device, when a single flat-disc ceramic honeycomb carrier catalyst seriously falls off, the single flat-disc ceramic honeycomb carrier catalyst can be replaced independently instead of being replaced integrally, and the problems that the tail gas purification treatment effect is weakened due to the fact that the catalyst falls off from the flat-disc ceramic honeycomb carrier, and tail gas is difficult to exhaust due to the fact that the flat-disc ceramic honeycomb carrier is blocked are solved.

The utility model belongs to the technical field of ceramic honeycomb carrier detection, and particularly discloses a honeycomb ceramic backpressure detector universal mold which comprises a second cover plate, an air uniformizing barrel body is fixed at the bottom of the second cover plate, and a plurality of groups of first electric telescopic rods are fixed on the inner side wall of the air uniformizing barrel body. A second sliding block is fixed to the end of each first electric telescopic rod and clamped in a clamping strip, a first fixing block is fixed to the end of the clamping strip, a first sliding block is fixed to the end, away from the first fixing block, of the clamping strip, a second electric telescopic rod is fixed in the air uniformizing barrel body, and a second fixing block is fixed to the output end of the second electric telescopic rod. One end of a spring belt is fixed to the side, away from the second electric telescopic rod, of the second fixing block, a third fixing block is fixed to the end, away from the second fixing block, of the spring belt, the third fixing block is fixed to the output end of the third electric telescopic rod, and a high-elasticity latex sheet is attached to the upper surface of the second cover plate. A first cover plate is arranged on the side, away from the second cover plate, of the high-elasticity latex sheet.

The invention relates to the field of coal mine methane heat storage oxidation catalysis, and discloses an ultralow-concentration methane heat storage catalytic oxidation furnace which comprises a furnace body, the furnace body comprises a lower chamber body, a middle chamber body and an upper chamber body, the lower chamber body is provided with a gas inlet channel, a gas outlet channel and a middle channel, and the middle channel is communicated with the gas inlet channel and the gas outlet channel. A push-pull valve is arranged at the communication part, and the flow direction of the methane gas in the whole furnace body is controlled by controlling the opening and closing of the push-pull valve; the middle channel is composed of a plurality of subareas which are separated from one another, each subarea is connected with the middle chamber body, the middle chamber body is composed of a plurality of heat storage catalysis chambers, and ceramic honeycomb heat storage bodies and methane catalysts are placed in the heat storage catalysis chambers; the upper chamber body is a communicated combustion chamber, and a large amount of heat generated by combustion of ultralow-concentration methane in the combustion chamber is discharged from a high-temperature heat taking port for power generation or heat supply. The invention provides a stable, safe and efficient heat storage catalytic oxidation furnace for the utilization of ultralow-concentration methane, and has very important significance for carbon emission reduction.

The invention discloses a honeycomb type coating catalyst for purifying waste gas CO as well as a preparation method and application of the honeycomb type coating catalyst, and belongs to the technical field of catalyst preparation. The preparation method comprises the following steps: adding ammonia water into a mixed salt solution of cobalt, cerium, titanium, aluminum, lanthanum and bismuth, carrying out coprecipitation, washing, drying and roasting to obtain Co3O4-CeO2-TiO2-Al2O3-La2O3-Bi2O3 composite oxide powder, adding the Co3O4-CeO2-TiO2-Al2O3-La2O3-Bi2O3 composite oxide powder, a water-soluble palladium compound and a bonding component into deionized water, carrying out ball milling to obtain slurry, repeatedly immersing a ceramic honeycomb in the slurry, taking out the ceramic honeycomb, drying and roasting to obtain the Co3O4-CeO2-TiO2-Al2O3-La2O3-Bi2O3 composite ceramic honeycomb. The honeycomb type coating catalyst for CO purification is obtained. The honeycomb type coating catalyst has the advantages of high coating loading capacity, high strength, difficulty in falling off, capability of effectively resisting adverse effects of NH3, NO, H2O and SO2 in waste gas and maintaining extremely high catalytic efficiency for a long time, is particularly suitable for a waste gas treatment program of a steel mill, and has relatively high industrial application value.

An inorganic membrane filtration article and methods for making the same. The membrane filtration article includes a sintered flow-through ceramic honeycomb with a plurality of partition walls defining a plurality of open channels from an inlet end of the honeycomb to an outlet end of the honeycomb. The honeycomb is formed from a cordierite composition with low-sodium and / or low-potassium content for enhanced filtration performance.

1. A method for making a ceramic honeycomb wall-flow filter substrate supporting an on-wall coating, wherein a section of the on-wall coated filter substrate analyzed by mercury porosimetry has a pore volume of 0.05 to 0.5 μm diameter as a percentage of the mercury intrusion volume of at least 15.0% of the section, and (i) an equivalent spherical diameter D(v,0.5) of 0.5 to 1 μm, which is equal to 10 to 35 wt. % of water, carboxylic acid, inorganic oxide particles, or a particulate insoluble cellulose pore former of heterogeneous morphology, with D(v,0.9) of 8 to 20 μm, relative to 100 wt. % of inorganic oxide particles. 4 μm and having a modal aspect ratio (width / length) of 0.3 to 0.9; (ii) coating the slurry onto at least first channels of a substrate, the substrate having an average pore size (D50) of 6 to 15 μm and a porosity of less than 60% before any coating; and (iii) drying and calcining the slurry-coated substrate, wherein the product of step (iii) has a porosity of 0.07 to 0.4 g / in based on the substrate weight before step (ii). 3 A method wherein sufficient slurry is coated onto a substrate to have a coating loading of (4.3-24.4 g / L) and an average on-wall coating thickness of the coated substrate is 5-70 μm.

To provide a honeycomb structure that is less susceptible to dielectric breakdown and damage at high temperatures. [Solution] A honeycomb structure comprising a ceramic honeycomb structure having an outer periphery wall and partition walls disposed inside the outer periphery wall and forming a plurality of cells extending from a first end face to a second end face, a pair of electrode parts disposed on the outer periphery wall, one or more slits provided in the honeycomb structure, and a filler material filling at least a part of the space of the slit. The filler material has an electrical resistivity of 10.0 × 10 at 900°C. 3 A thermal expansion coefficient of 9.0 × 10⁻¹⁰ or greater, at temperatures of 40 to 800°C. -6 The temperature is below / ℃, and the Young's modulus is 0.10 GPa or higher.

The invention belongs to the technical field of glass fiber reinforced plastic composite material production, and particularly relates to a glass fiber reinforced plastic composite material waste gas control process which comprises the following steps: S1, waste gas collection: conveying waste gas by adopting a glass fiber reinforced plastic pipeline; s2, rotating wheel concentration: low-concentration VOCs are adsorbed by using a zeolite rotating wheel, the concentration is increased after desorption, and a desorption heat source is recycled waste heat; s3, pretreatment: sequentially passing through a detachable glass fiber filter cartridge-activated carbon layer, superheated water molecule reaction and pulse electrostatic treatment; s4, deep treatment: catalyzing, combusting, oxidizing and degrading organic matters; and S5, heat energy recovery, wherein a ceramic honeycomb heat exchanger conducts countercurrent flow heat exchange, and air is preheated to 120 DEG C or above for reuse. Through the combined process of rotating wheel concentration and catalytic combustion, low-concentration waste gas is concentrated and then treated, the combustion efficiency is improved, and the energy consumption is reduced; particulate matters and part of VOCs (Volatile Organic Compounds) are removed through three-stage pretreatment of dry filtration, superheated water molecular reaction and pulse static electricity, and efficient and low-consumption treatment is realized through staged purification and heat energy recovery.

In one aspect, a ceramic matrix composite sandwich structure has a ceramic honeycomb core structure, a first face sheet on a first surface of the ceramic honeycomb core structure, and a second face sheet on a second surface of the ceramic honeycomb core structure. Methods of preparing the ceramic matrix composite sandwich structure involve applying ceramic matrix composite prepregs to a honeycomb core to form an unbonded sandwich structure, subjecting the unbonded sandwich structure to an autoclave process to form an intermediate bonded sandwich structure, and subjecting the intermediate bonded sandwich structure to a sintering process to produce the ceramic matrix composite sandwich structure.

This invention relates to the field of waste gas treatment equipment technology, and discloses a regenerative thermal incineration waste gas treatment device, including a support frame. Three regenerative chambers are fixedly connected to the top of the support frame, and a common combustion chamber is fixedly connected to the top of the three regenerative chambers. This invention addresses the problem of local overheating and thermal shock cracking of ceramic honeycomb. An auxiliary mechanism and a pressure mechanism are set inside the device. After the waste gas is purified, a hydraulic press pushes a hydraulic push rod upward, which in turn moves the highest fixed frame two upward. As the hydraulic push rod continues to move upward, the six fixed frames two will separate, and the air inlet pipe will generate a negative pressure suction force, forcing the purified high-temperature gas in the common combustion chamber to flow downward and heat the honeycomb ceramic two and honeycomb ceramic one. This causes multiple sets to separate, allowing the oxygen remaining inside the honeycomb ceramic one and honeycomb ceramic two to diffuse outward at once, while reducing the length of the "combustion channel" and effectively reducing the probability of combustion and explosion.

The utility model provides a ceramic honeycomb defect visual inspection device, and relates to the technical field of ceramic honeycomb detection. The laser scanner is positioned above the base and is used for detecting ceramic honeycomb defects; the automatic device is arranged on the surface of the base and is used for automatically carrying out laser scanning operation on the ceramic honeycomb; the limiting device is arranged on the surface of the automatic device and used for fixing and limiting the ceramic honeycomb, the automatic device comprises a support, the support is fixedly connected with the base, the surface of the support is fixedly connected with a servo motor, the output end of the servo motor is fixedly connected with a transmission shaft, the arc surface of the transmission shaft is fixedly connected with an arc-shaped rod, and the arc-shaped rod is fixedly connected with the base. The arc-shaped rod is rotationally connected with the base, and the arc-shaped rod and the laser scanner are detachably installed. According to the utility model, the problem that the detection operation of the ceramic honeycomb is influenced because the scanning efficiency is slow when a worker holds a scanner by hand is solved.

This invention discloses a high-temperature resistant microwave absorbing honeycomb ceramic, its preparation method, and its applications, relating to the field of porous ceramic materials technology. The process includes obtaining a honeycomb skeleton; introducing a porous structural material onto the honeycomb skeleton to obtain a honeycomb structure preform; introducing a ceramic phase onto the honeycomb structure preform to obtain a porous composite; and removing the honeycomb skeleton from the porous composite to obtain the high-temperature resistant microwave absorbing honeycomb ceramic. The ceramic prepared by this invention has a porous wall structure and a hollow skeleton, mainly solving the shortcomings of existing high-temperature resistant microwave absorbing honeycomb ceramics, such as complex preparation processes, poor microwave absorption performance, and difficulty in control.

A honeycomb body having a porous ceramic honeycomb structure with a first end, a second end, and a plurality of walls having wall surfaces defining a plurality of inner channels. A porous material is disposed on one or more of the wall surfaces of the honeycomb body. A method for forming a honeycomb body includes depositing a porous inorganic material on a ceramic honeycomb body and binding the porous inorganic material to the ceramic honeycomb body to form the porous layer.

A cement mixture for applying to a ceramic honeycomb body that includes: (i) inorganic ceramic particles; (ii) an inorganic binder; (iii) an organic binder containing a hydrophilic polymer and a hydrophilic additive comprising a polymer with a different composition than the composition of the hydrophilic polymer, the additive having a weight average molecular weight (Mw) of at least 1,000,000 g / mol; and (iv) an aqueous liquid vehicle.

A catalyst-loaded porous ceramic honeycomb article and method of manufacture. The ceramic honeycomb article comprises an array of intersecting walls defining channels extending axially through the ceramic honeycomb article. The method comprises depositing catalyst material within a pore structure of a porous ceramic material of the walls in a first deposition process comprising a first set of deposition parameters to form an in-wall portion of a catalyst deposition. Catalyst material is deposited onto outer surfaces of the walls in a second deposition process comprising a second set of deposition parameters that differ from the first set of deposition parameters to form an on-wall portion of the catalyst deposition. The second deposition process does not increase the in-wall portion of the catalyst deposition to above a target final pore occupancy of the pore structure.

The utility model provides waste gas treatment equipment for catalytic combustion of a regenerative chamber, which relates to the technical field of waste gas treatment and comprises a heating box and a catalytic reaction component, the catalytic reaction component comprises a packaging box mounted on the inner side of the heating box, and a ceramic honeycomb heat accumulator is welded on the inner side of the packaging box. An electric heating catalytic heater is arranged at the bottom of the catalytic heating box, limiting clamping grooves are welded to the upper end and the lower end of the inner side of the catalytic chamber correspondingly, cordierite bearing plates are installed on the inner sides of the limiting clamping grooves correspondingly, catalyst spraying layers are arranged on the surfaces of the cordierite bearing plates correspondingly, and a siphon fan is arranged on the right side of the catalytic chamber. The electric heating catalyst can heat the ceramic honeycomb heat accumulator, so that waste gas entering the catalyst box through the gas transmission port is preheated, preparation is made for follow-up waste gas catalysis, the ceramic honeycomb heat accumulator has the characteristics of high temperature resistance, large heat capacity and small resistance, and the unique honeycomb structure of the ceramic honeycomb heat accumulator provides a huge heat exchange area for gas.

To provide a heat storage body in which a plurality of honeycomb structures are continuously provided in an axial direction in which cells extend, and an increase in pressure loss is suppressed in gas circulation due to the fact that the positions of the cells in each of the honeycomb structures are shifted between the adjacent honeycomb structures.SOLUTION: In a heat storage body 1 in which a plurality of ceramic honeycomb structures 10 including a plurality of cells partitioned by partition walls extending in a single direction and arranged in a row are continuously provided in an axial direction in which the cells extend with end surfaces where the cells are open facing each other, only a layer of silicic acid-based glass is interposed at a boundary between the honeycomb structures 10 adjacent to each other in the axial direction in which the cells extend.SELECTED DRAWING: Figure 2

The utility model discloses a high-strength durable slag line brick for a steel ladle, which relates to the technical field of slag line bricks and comprises a slag line brick body, four corners of the outer wall of the slag line brick body are arc corners, and a plurality of radial reinforcing ribs uniformly extend to the periphery along the radial direction of the outer wall of a support rib to reach an anti-oxidation coating. According to the utility model, the metal ceramic honeycomb-shaped supporting framework is arranged in the chamfered square hole and is integrally sintered with the hole wall to construct a high-strength and high-stability three-dimensional bearing network structure, so that the compressive strength of the slag line brick is remarkably enhanced, the slag line brick can bear a harsh working environment, and the service life of the slag line brick is prolonged. According to the slag line brick provided by the invention, the radial reinforcing ribs are arranged on the surface of the slag line brick, and are matched with a dual-protection mechanism of the porous reinforcing body and the anti-oxidation coating, so that the permeation of slag is effectively blocked, all-directional protection is provided for the slag line brick, and in addition, the radial reinforcing ribs further disperse stress concentration, avoid structural damage caused by overlarge local stress and prolong the service life of the slag line brick. Therefore, the overall durability and reliability of the slag line brick are greatly improved.

A cement composition for application to a ceramic substrate, such as a cement skin composition for application to a ceramic honeycomb body is provided. The cement composition includes a first source of inorganic particles having a mean particle diameter <50 nm, wherein the first source of inorganic particles is present at about <15% (by dry weight), a second source of inorganic particles having a mean particle diameter of from about 50 nm to about 700 nm, wherein the second source of inorganic particles is present at from about 5% to about 15% (by dry weight), and a water-soluble organic binder. An inorganic fibrous material can be present at about <15% (based on dry weight). The amount of at least one of the first source of inorganic particles or the inorganic fibrous material is greater than 0% (by dry weight).

A ceramic honeycomb structure comprising large numbers of flow paths longitudinally formed by cell walls arranged in a lattice pattern in cross section, and an outer peripheral wall formed around the flow paths; in a cross section perpendicular to the longitudinal direction, fan-shaped bulges projecting in a fan shape toward the flow paths from cell wall intersections at which the cell walls are crossing; the circumscribed circles of circular portions of the fan-shaped bulges at all cell wall intersections having a constant radius; and when the distance between the center point of the circumscribed circle and the center point of the cell wall intersection is defined as a center point distance S, a center point distance So in the outer peripheral portion of the ceramic honeycomb structure and a center point distance Sc in the center portion meeting Sc<So.

A ceramic honeycomb structure comprising pluralities of honeycomb segments each having pluralities of longitudinally penetrating flow paths partitioned by porous cell walls and plugs formed in the end portions of the flow paths, and a bonding material layer boding the peripheral walls of the honeycomb segments, the bonding material layer comprising silicon carbide particles as aggregate and a bonding phase bonding the silicon carbide particles, the bonding phase comprising at least a cordierite phase and a spinel phase, the molar ratio M1 of the cordierite phase [=cordierite phase / (cordierite phase+spinel phase)] being 0.50 or more and less than 1.0, and the content of (cordierite phase+spinel phase) in the bonding phase being 50% or more by mass.

The invention discloses a high-temperature and high-dust flue gas dust removal and denitration integrated device, which is applied to the technical field of flue gas dust removal and denitration, and comprises a support frame, a denitration mechanism, a heat storage mechanism, a hot air channel, a high-pressure tank assembly, a first dust remover and a second dust remover, and the denitration mechanism, the heat storage mechanism and the high-pressure tank assembly are all connected to the top of the support frame through bolts. After air for cleaning ash is heated by utilizing the heat storage mechanism and the hot air channel, the heat of the air is stored in the ceramic honeycomb heat storage body. The part of heat is then used for heating clean dedusted flue gas, so that the dedusted flue gas reaches the SCR reaction temperature. And after the heat accumulator is heated, the waste heat air is stored in the high-pressure tank and is used for pulse dust removal of the dust remover. According to the design, one heat source and three purposes (heat storage, flue gas heating and ash removal) are achieved, an energy closed loop in the system is formed, hot air formed by electric heating is recycled to the maximum extent, and operation energy consumption is remarkably reduced.

A catalyst-coated, plugged honeycomb body having a honeycomb structure with a matrix of porous walls forming a plurality of channels, at least some of the plurality of channels being plugged to form inlet channels and outlet channels. At least some of the porous walls are filtration walls and at least some of the porous walls are non-filtration walls. A catalyst is preferentially disposed on the non-filtration walls, wherein the catalyst being preferentially disposed comprises CR<0.2 wherein CR is a coating ratio defined as an average percent loading of a washcoat containing the catalyst on and within the filtration walls divided by an average percent loading of the washcoat containing the catalyst on and within the non-filtration walls. Methods and apparatus configured to preferentially apply a catalyst-containing slurry to the non-filtration walls are provided, as are other aspects.

The utility model discloses a waste gas treatment heat storage oxidation furnace, which comprises a furnace shell, a gas inlet pipe fitting, a gas outlet pipe fitting and a purging pipe fitting, the furnace shell is enclosed by a flame-retardant heat insulation cotton pressing plate and a metal frame body, the inside of the furnace shell is divided into a combustion chamber and at least three heat storage chambers below the combustion chamber, grids are arranged at the bottoms of the heat storage chambers, and ceramic saddle rings are stacked on the grids. And a ceramic honeycomb plate is placed above the ceramic saddle ring. The furnace shell is defined by the flame-retardant heat insulation cotton pressing plate and the metal frame body, so that the furnace shell has a good heat preservation effect, and the heat loss of the heat storage oxidation furnace is reduced. A ceramic saddle ring and a ceramic honeycomb plate are sequentially stacked at the bottom of the heat storage chamber, and waste gas heat generated after combustion can be reserved for preheating new organic waste gas. And the flame-retardant heat insulation cotton pressing plate is matched with the ceramic saddle ring and the ceramic honeycomb plate, so that the heat storage oxidation furnace can realize high heat storage efficiency.