314 results about "Honeycomb ceramic" patented technology

The invention discloses a honeycomb ceramic and a preparation method thereof.A composite additive is added into a mixed ceramic raw material, the weight ratio of the mixed ceramic raw material to the composite additive is (30-50): (50-70), and the composite additive comprises 30-54 parts of flaky aluminum oxide, 2-10 parts of nano zinc oxide and 1-5 parts of metal molybdenum particles; the preparation method comprises the steps of ball milling, kneading, refining, extrusion forming, drying and sintering. According to the invention, the raw material formula is optimized, and bauxite is replaced by flaky alumina; beneficial additives, namely nano zinc oxide and metal molybdenum particles, are doped; an original extrusion molding device is used for achieving a layered structure of flaky aluminum oxide, and therefore the shell-imitating pearl layer structure with the layered aluminum oxide as bricks, the metal molybdenum particles as mud and the zinc-aluminum spinel particles as protrusions is built.

The invention relates to the technical field of heating management, and discloses an energy management method and system for a ceramic heating body of a wireless blower, and the method comprises the steps: obtaining a blower starting instruction, configuring initial heating parameters of a honeycomb ceramic heating module, configuring a related blower function module, starting the heating and blowing work, continuously collecting the posture parameters of the blower, and carrying out the energy management of the ceramic heating body of the wireless blower. The method comprises the following steps of: identifying key working characteristics, matching a historical database, determining an expected working mode, analyzing an alternate heating scheme of a honeycomb ceramic unit, formulating a heating driving scheme, and performing current control according to the driving scheme, so that the heating module reaches the expected heating mode. The heating efficiency and heat management optimization are improved, the working mode is intelligently matched, the service life of the heating body is prolonged, more efficient and comfortable blowing experience is provided, energy consumption is reduced, safety is improved, and the problem that in the prior art, the expected life of a ceramic heating body is short is solved.

The multifunctional environment-friendly and energy-saving flowerpot comprises a pot body and a tray, a boss is arranged on a bottom layer plate of an inner cavity of the pot body, and a drainage hole is formed in the middle of the boss. One end of the honeycomb ceramic tube is communicated with the inner cavity of the pot body, the other end of the honeycomb ceramic tube penetrates through the drain hole and is flush with the lower surface of the bottom plate of the pot body or is sleeved on the boss, the thickness of the wall of the honeycomb ceramic tube is 30-40% of the diameter, the porosity of the honeycomb ceramic tube is 40-70%, and the honeycomb ceramic tube contains pelelith and chitin. According to the utility model, frequent watering is not needed, soil can always keep moist humidity for growth of the plant bonsai for a long time, water is not accumulated, and hot air generated by water evaporation can be timely discharged when the bonsai is heated at high temperature, so that the bonsai cannot be dried up and burnt when the room temperature rises; therefore, the potted landscape can grow normally for a long time, the pot body is bactericidal and antibacterial, water molecules are refined to be conveniently absorbed by a root system, and the functions of constant temperature, heat preservation, ventilation and the like are achieved.

The invention discloses a preparation method of high-performance cordierite DPF honeycomb ceramic, and belongs to the technical field of honeycomb ceramic carrier preparation. The preparation method comprises the following steps: mixing raw materials; kneading mud; performing extrusion molding; drying and shaping; cutting and firing to obtain a cordierite honeycomb ceramic carrier; and performing boundary dimension processing, film covering, hole dotting, mud scraping and drying to obtain a finished product. According to the invention, aluminum hydroxide is adopted to replace or partially replace aluminum oxide in the formula of the cordierite porous ceramic structure while magnesium hydroxide is used, and the two substances can form a synergistic heat absorption mechanism by virtue of the difference of the aluminum hydroxide and magnesium hydroxide in thermal decomposition temperature, so that the heat absorption efficiency of the cordierite porous ceramic structure is greatly improved in the low-temperature coke discharge stage of a carrier mud blank. Aluminum hydroxide is subjected to a decomposition reaction before magnesium hydroxide, and then magnesium hydroxide is continuously decomposed at a higher temperature, so that the temperature range covered by the whole heat absorption process is greatly widened, the heating rate of the carrier mud blank is effectively slowed down, and thermal shock caused by sudden rising of local temperature is avoided.

The invention relates to hole plugging slurry of a wall flow type honeycomb ceramic filter body and a preparation method of the hole plugging slurry. The hole plugging slurry comprises inorganic powder and an additive, the additives comprise the following components in percentage by mass of the inorganic powder: 0.1-1% of an organic binder, 0.3-1% of an anti-sagging agent, 0.05-0.2% of a flatting agent and 0.3-2% of a water reducing agent. The hole plugging slurry provided by the invention has good tiling property and slurry hanging property, so that the scraped or pressed hole plugging slurry is quickly tiled to the hole wall surface when entering the honeycomb ceramic hole channel, the hole wall is completely and compactly filled with the slurry in the process of advancing in the hole, the bonding strength between the slurry and the hole wall is improved, and the hole plugging quality is improved. And the problem of peeling or local light leakage in the drying or sintering process is avoided.

The invention belongs to the technical field of post-treatment of exhaust gas discharged by a mobile source, and particularly relates to a monolithic catalyst as well as a preparation method and application thereof. The preparation method of the catalyst comprises the following steps: fully mixing the raw materials, namely the molecular sieve, the soluble metal salt, the deionized water, the silane coupling agent, the zirconium silica sol, the dispersing agent, the deionized water and the pH regulator, and then putting the mixture into a circulating type stirring ball mill for one-step grinding and pulping; soaking a honeycomb ceramic carrier in the prepared slurry, repeating for multiple times, and then drying and roasting at high temperature; and placing the roasted monolithic catalyst in an activation atmosphere, and carrying out high-temperature activation treatment. Active metal elements in the prepared monolithic catalyst are uniformly distributed, the stability and activity of a catalytic coating are enhanced, and the monolithic catalyst can be widely applied to catalytic treatment of waste gas discharged by moving sources such as diesel vehicles and gasoline vehicles, and has important environmental protection significance and huge economic value.

The utility model relates to a steel sintering machine tail gas CO catalytic purification system which comprises an exhaust pipeline, and a front-stage purification unit and a rear-stage catalysis unit are sequentially installed in the exhaust pipeline. The front-stage purification unit is of a wall flow type honeycomb ceramic structure and comprises a front-stage ceramic shell. According to the CO catalytic purification system for the tail gas of the steel sintering machine disclosed by the utility model, impurities such as ash, carbon black, SO2 and halogen in the tail gas of the sintering machine are effectively intercepted by arranging the pre-stage purification unit with a wall-flow honeycomb ceramic structure, so that the tail gas is purified to a certain extent; the poisoning influence of the impurities on a CO catalytic oxidation active coating in a rear-stage catalytic unit is avoided, and the long-term efficient catalytic oxidation activity of the catalytic unit on CO is guaranteed. Meanwhile, the utility model further designs an in-situ regeneration control system of the preceding-stage purification unit, so that the exhaust back pressure increase of the preceding-stage purification unit is effectively controlled, and the long-term stable operation of the whole catalytic purification system is ensured.

The invention relates to a catalyst for treating nitrogen-containing VOCs and application thereof in treatment of nitrogen-containing VOCs, the main preparation steps are as follows: a carrier component containing Si, Al and optional Mg, a cross-linking agent, a rare earth oxide and water are put in a ball mill for ball milling to prepare coating slurry, the coating slurry is coated in cordierite honeycomb ceramic channels by a vacuum coating method, and the catalyst is prepared. And then the coated honeycomb ceramic is quickly dried. Preparing a metal nitrate solution as an impregnation liquid, impregnating the nitrate on the dried honeycomb ceramic, aging, quickly drying the impregnated honeycomb ceramic, and roasting the dried honeycomb ceramic for a certain time to obtain the catalyst. According to the preparation method disclosed by the invention, the catalyst for treating the nitrogenous VOCs, which is formed in a honeycomb manner, low in preparation cost, relatively high in N2 selectivity, good in catalytic oxidation effect and high in stability, can be produced, so that the problems of long technological process, short service life of the catalyst, secondary pollution of NOx and the like in the conventional process for treating the nitrogenous VOCs are solved.

The invention discloses a treatment method of electroplating wastewater, and belongs to the technical field of electroplating wastewater treatment. The process comprises the following steps: electrically adjusting the pH value of the electroplating wastewater to 2.5-4.0, adding ferrite, adopting a Ti / PbO2 anode and a graphite cathode, controlling the current density to 15-30mA / cm, introducing air, reacting for 40-80 minutes, and adjusting the pH value to 6.0-7.0 after the reaction; introducing the wastewater into a chelating resin column, wherein the chelating resin is an amino phosphonic acid type or iminodiacetic acid type; the method comprises the following steps of: introducing into a built-in filter column, loading two layers of recrystallized silicon carbide honeycomb ceramic membranes in the filter column in parallel, performing cross-flow filtration under the conditions that the operation pressure is 0.8-2.0 MPa, the temperature is 25-40 DEG C and the cross-flow velocity is 1.5-3m / s, and collecting permeate; the permeate liquid is used for backwashing every 8-12 hours of operation. According to the method, heavy metal ions in the electroplating wastewater can be effectively removed, and the treatment efficiency of the electroplating wastewater is improved.

The invention relates to the technical field of air pollution control, in particular to an air pollution denitration and desulfurization tail gas purification method which comprises the following steps: rotational flow spray desulfurization (adopting nanoscale composite absorbent slurry to efficiently absorb SO2 and remove particulate matters in a rotational flow reactor), two-stage catalytic denitration (using a nano-catalyst to promote NOx reduction in a low-temperature region, and using a high-temperature catalyst to remove the particulate matters in a low-temperature region). In the high-temperature area, a vanadium-tungsten-titanium-based catalyst is loaded through a novel honeycomb ceramic carrier to strengthen the reaction), deep collaborative purification is carried out (residual pollutants and aerosol are further removed by utilizing electrostatic precipitation and oxidative adsorption coupling), and an intelligent regulation and control system is used for optimizing the ratio of an absorbent, the temperature of the catalyst and flow velocity parameters in real time. According to the method, the problems of catalyst poisoning, high energy consumption and insufficient treatment efficiency in a traditional process are solved through a nano material modified absorbent, a temperature gradient catalytic reaction and a multi-pollutant synergistic removal mechanism. The desulfurization efficiency of the system is greater than or equal to 98%, the denitration efficiency is greater than or equal to 97%, the particulate matter emission is less than or equal to 10mg / m < 3 >, the SO2 is less than or equal to 35mg / m < 3 >, and the NOx is less than or equal to 50mg / m < 3 >

The invention discloses a refrigerating and humidifying device applied to a mushroom house. The refrigerating and humidifying device comprises a shell, a surface air cooler, a humidifying device body, a fan and an air duct system. The surface air cooler, the humidifying device, the fan and the air duct system are located in the shell, and an inlet is formed in the position, close to the humidifying device, of the shell. The humidifying device comprises a honeycomb ceramic combination body and a water spraying device arranged towards the air inlet end face of the honeycomb ceramic combination body, and the water spraying device intermittently sprays water to the honeycomb ceramic combination body so that the honeycomb ceramic combination body can be kept wet. The air channel A is provided with a proportional valve a, the air channel B is provided with a proportional valve b, and the proportional valve a and the proportional valve b are in linkage reverse control and used for adjusting the proportion of the air volume flowing through the air channel A and the air volume flowing through the air channel B and keeping the sum of the air volume flowing through the air channel A and the air volume flowing through the air channel B constant. And when the temperature is reduced, the humidity is controlled at the same time. Energy waste is avoided, and efficiency and energy conservation are achieved. The invention further discloses an edible mushroom house environment control system.

The utility model relates to the technical field of copper strip oxidation treatment, in particular to a special-shaped copper strip surface oxide skin treatment device. Comprising a working box body, a control panel is arranged on one side wall of the working box body, a liquid storage box is arranged in the working box body, a timer is arranged on the surface of one side of a supporting panel, a limiting sliding groove is formed in the surface of one side of the supporting panel, a threaded rod is arranged in the limiting sliding groove, and a movable sliding block is arranged in the limiting sliding groove. A ceramic placing box is arranged above the working box body, a honeycomb ceramic filter plate is embedded into the bottom of the ceramic placing box, a driving motor is arranged at the top of a supporting panel, two groups of movable sliding grooves are formed in the bottom end of the interior of the working box body, and two groups of movable sliding strips are arranged at the bottom end of a liquid storage box. According to the embodiment, the surface treatment quality of the copper strip is improved while the rust remover or the acid solution is prevented from being over-reacted with the copper strip.

The invention relates to the field of catalysts. The invention relates to a catalyst for catalytic oxidation of carbon monoxide in industrial sulfur-containing flue gas. A carrier is a cordierite honeycomb ceramic carrier coated with activated aluminum oxide (Al2O3), silicon oxide (SiO2) or titanium oxide (TiO2), or a honeycomb carrier with titanium oxide as a skeleton; the noble metal active component is selected from one or a combination of more of palladium (Pd), platinum (Pt) and rhodium (Rh), the total loading capacity accounts for 0.05-0.4 wt% of the mass of the carrier, and the noble metal component is loaded on the surface layer of the carrier at the depth of 10-300 microns and is of an eggshell type distribution structure; the cocatalyst component is selected from one or a combination of more of vanadium oxide (VO), tungsten oxide (WO), cerium oxide (CeO), molybdenum oxide (MoO) and lanthanum oxide (La2O3) and is uniformly distributed on the carrier. Unification of activity, stability and economical efficiency of the catalyst is achieved, the problems that a catalytic oxidation catalyst is prone to inactivation, low in activity and high in cost in complex sulfur-containing flue gas are solved, and the industrial application value is remarkable.

The invention discloses toughened honeycomb ceramic as well as a preparation method and application thereof. The toughened honeycomb ceramic is prepared by mixing, kneading, refining, drying and sintering a mixed ceramic raw material and an additive, the additive accounts for 4-12wt% of the weight of the mixed ceramic raw material, and the additive comprises yttrium-stabilized zirconia and nickel-titanium memory alloy in a mass ratio of (1-3): (1-3). According to the method, plastic deformation of the memory alloy is induced by utilizing the volume change of the instantaneous phase change of the yttrium-stabilized zirconia when the crack is generated, and the damage accumulated in the ceramic at the low-temperature stage can be partially recovered by utilizing the memory effect and the hyperelastic effect of the memory alloy. And a dual protection mechanism of instantaneous energy consumption and hysteresis recovery is constructed, and the damage resistance and toughness of the material are remarkably improved.

The high-precision constant-speed honeycomb ceramic extruding machine comprises a main machine, an automatic material conveying mechanism, a segmented material cutting mechanism, a hydraulic station and an automatic control device, the main machine comprises an upper cross beam, a material cavity beam plate and stand columns, a hydraulic plunger is fixedly arranged on the upper cross beam, a main column rod and an ejector rod are arranged in the hydraulic plunger, and the lower end of the main column rod is connected with a movable mold frame; the lower end of the ejector rod penetrates through the movable die frame and is fixedly provided with a pressing head, a pressing sleeve is arranged between the vacuum sealing plate and the ejector rod, a die sleeve assembly is fixedly arranged on the material cavity beam plate, the vacuum sealing plate and the upper end face of the die sleeve assembly are tightly sealed, and a material cavity in the die sleeve assembly is vacuum. The pressing head can stretch into the cavity material in a sealed mode and press pug in the material cavity out of the die sleeve assembly. The four-column type honeycomb ceramic extruder is high in precision, large in pressure, high in vacuum degree, constant in extrusion speed and good in sealing ring effect, the production efficiency can be improved, the production cost can be reduced, and the product quality can be improved.

The present application provides a honeycomb ceramic carrier, a preparation method thereof, and a catalytic body containing the honeycomb ceramic carrier, the honeycomb ceramic carrier comprising: a body; a plurality of compartments with hollow structures in the body, the compartments penetrating through the body to form a honeycomb structure; wherein the compartments have a quadrilateral cross section, one pair of opposite angles of the quadrilateral cross section has an inner recess or a chamfer, and the other pair of opposite angles of the quadrilateral cross section does not have an inner recess or a chamfer. The present application improves the structural strength of the ceramic carrier for carrying catalysts, and reduces the bending phenomenon of the partition wall of the thin-walled ceramic carrier with a honeycomb structure without increasing the degree of mold wear, thereby improving the yield.

The invention discloses self-adaptive adjustment cordierite honeycomb ceramic forming equipment, and relates to the field of cordierite honeycomb ceramic forming processing. The device comprises a forming mechanism and a receiving and cutting mechanism, and the forming mechanism stably supports an extrusion forming device through an L-shaped supporting frame; the bearing cutting mechanism comprises a bearing base, a supporting assembly, an angle adjusting assembly, a position adjusting assembly and a cutting part, the supporting assembly supports the position adjusting assembly through an L-shaped mounting base, the position adjusting assembly can flexibly adjust the spatial position of the angle adjusting assembly, and the angle adjusting assembly can adjust the overall or local bearing angle of the bearing table; and the cutting component can synchronously complete cutting. The equipment solves the problems that existing equipment is unstable in supporting, inflexible in adjustment, low in machining efficiency and the like, and the forming precision, the adaptability and the machining efficiency are improved.

The invention provides a high-porosity honeycomb pore ceramic bond grinding tool forming device, and belongs to the technical field of semiconductor hard and brittle material precision machining, the high-porosity honeycomb pore ceramic bond grinding tool forming device comprises a mold, a forming groove is formed in the upper surface of the mold, the forming groove penetrates through the mold, and grinding tool slurry is injected into the forming groove; the grinding tool slurry is arranged to form a gel body in the forming groove, and the gel body is self-tightened downwards; the absorption layer abuts against the lower surface of the mold and is used for absorbing moisture in the gel body so that the gel body can be rapidly self-tightened downwards; and the temperature regulation and control module is used for heating the absorption layer to promote rapid evaporation of the moisture absorbed by the absorption layer, so that the absorption layer can continuously absorb the moisture in the gel. The problem that in the related technology, the blank curing forming time is long is effectively solved.

The invention provides a honeycomb ceramic supported denitration catalyst, a preparation method thereof and a flue gas denitration method. The method comprises the following steps: etching a cordierite honeycomb ceramic matrix in alkali liquor to obtain a pretreated honeycomb frame carrier; the preparation method comprises the following steps: mixing a titanium source, a silicon source and organic alcohol to obtain a mixed solution, carrying out hydrothermal reaction, and carrying out first drying and first roasting to obtain Ti-Si modified TiO2 hollow microspheres; adding water into the Ti-Si modified TiO2 hollow microspheres, a vanadium source, a tungsten source, a binding agent, a dispersing agent, a pore forming agent and a buffering agent, and then performing ball milling to obtain coating type catalyst slurry; and coating the pretreated honeycomb-shaped frame carrier with the coating type catalyst slurry, and then performing aging, secondary drying and secondary roasting to obtain the honeycomb ceramic supported denitration catalyst. The denitration catalyst provided by the invention has the characteristics of large specific surface area, high denitration efficiency and wide active temperature interval, and can be suitable for higher catalytic temperature.

The present invention provides a honeycomb ceramic substrate, a preparation method thereof, and an exhaust gas catalytic core. The honeycomb ceramic substrate contains silicon carbide, wherein the crystalline phases of the silicon carbide include 4H-SiC and 6H-SiC. The mass of the 4H-SiC accounts for 13% to 30% of the total mass of the honeycomb ceramic substrate, and the mass of the 6H-SiC accounts for 40% to 55% of the total mass of the honeycomb ceramic substrate. The porosity of the honeycomb ceramic substrate is 45% to 70%, preferably 50% to 65%. The honeycomb ceramic substrate provided by the present invention can achieve a higher cost-effectiveness while ensuring excellent porosity, pore volume, and thermal diffusivity.

The utility model relates to the technical field of catalyst carriers, and particularly discloses a honeycomb ceramic catalyst carrier which comprises a cross-shaped mounting frame, corresponding mounting boxes are arranged between ends of the mounting frame, a carrier main body is arranged in each mounting box, one end of each mounting box is in an opening state and is provided with a sealing plate, and the other end of each mounting box is provided with a sealing plate. A plurality of circulating holes are formed in the other end of the mounting box and a plate body of the sealing plate; a plurality of limiting grooves are formed in two sides of each end of the mounting frame; according to the utility model, the catalyst carrier is divided into a plurality of relatively independent individuals, so that when the catalyst carrier is broken and damaged in the use process, personnel can independently replace the damaged carrier in a targeted manner, thereby avoiding the waste of resources and the economic loss of personnel when the whole catalyst carrier is replaced; and the mounting box and the sealing plate form a whole, so that the chippings of the carrier main body can be conveniently collected when the carrier is maintained by personnel in the later period.

The application discloses a precious metal embedded porous carbon coated honeycomb ceramic monolithic catalyst and application thereof. The liquid phenolic resin polymer containing chloroplatinic acid is uniformly coated on the surface of the cordierite honeycomb ceramic through impregnation treatment; in an oxygen-nitrogen mixed atmosphere, one-stage solidification makes the liquid phenolic resin polymer containing chloroplatinic acid coated on the surface of the cordierite honeycomb ceramic completely solidified; two-stage calcination makes oxygen react with chloroplatinic acid, so that the chloroplatinic acid is decomposed, and the negative influence of chloride ions on the catalyst is eliminated; in an inert gas argon atmosphere, carbonization makes the phenolic resin polymer carbonize under high-temperature conditions to form porous carbon, and meanwhile, platinum ions are reduced to platinum single elements and embedded by the porous carbon, so that the precious metal (platinum, iridium) embedded porous carbon coated honeycomb ceramic monolithic catalyst is finally prepared.

The invention relates to the technical field of grinding in material engineering, and discloses a high-porosity honeycomb pore ceramic bond grinding tool and a preparation method and application thereof.The preparation method of the mold comprises the following steps that S1, a solvent, a gelatinizing agent, a ceramic bond, a pore forming agent and a grinding material are pretreated to prepare sol slurry; s2, after gel treatment, the sol slurry forms a gel body, pore-forming agents in the gel body are mutually adsorbed through self-tightening treatment, gaps between the pore-forming agents are filled with a ceramic bonding agent and an abrasive material, and a grinding tool blank is obtained; and S3, the grinding tool blank is subjected to firing process treatment, and the target grinding tool is obtained. According to the preparation method disclosed by the invention, the pore-forming agent is used as a template, and the ceramic bond grinding tool prepared by a process method of stacking and self-assembling an in-situ gel casting mold through the pore-forming agent has the advantages of high porosity, high macro porosity, uniform pore size and uniform distribution, and has good mechanical properties and grinding properties such as cooling and chip containing.

1. The name of the design product: honeycomb ceramic with grooves. 2. The use of the design product: used as ceramic heat accumulator in organic waste gas treatment device. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective view.

The invention discloses a preparation method of a ceramic reinforced metal matrix composite material based on atomic layer deposition coating. The preparation method comprises the following specific steps: 1, pretreatment of ceramic particles: surface cleaning, roughening treatment and surface activating treatment; 2, ceramic particle surface atomic layer deposition coating: preheating, precursor gas introduction, inert gas purging, oxygen source supply, inert gas secondary purging, cooling and annealing; and 3, preparation of the ceramic reinforced metal-based composite material: preparing a honeycomb-shaped ceramic prefabricated body, and pouring molten metal to obtain a ceramic reinforced metal-based composite material product. The atomic layer deposition technology is utilized, Al2O3, Ni or TiO2 films are deposited on the surfaces of the ceramic particles to improve the interface bonding force between the ceramic particles and the matrix, the surface films are uniform and compact, meanwhile, the thickness of the films can be accurately controlled, the wettability between the ceramic particles and the metal matrix is effectively improved, and the ceramic particles can be prepared. And the interface bonding force between the metal matrix and the ceramic particles is obviously improved.

The application provides a monolithic catalyst for propane combustion, which comprises a square cordierite honeycomb ceramic carrier and a double-layer coating coated on the carrier, the square cordierite honeycomb ceramic has controllable pore size; the coating comprises active components Pt and Pd, the active components are loaded on modified composite alumina, the modified composite alumina has a composition of MO x -Al2O3; the mass ratio of the noble metals Pt and Pd is 1:(0.2-2); the weight proportion of the noble metals in the coating material is 1-5%. Through detection, the catalyst obtained by the technical scheme has a significantly improved purification efficiency for propane, and the purification efficiency after 8000h can reach or exceed 96%, and the catalyst has a high propane purification efficiency; after the catalyst is hydrothermally aged for 100h at 850 DEG C with 10% H2O, the purification efficiency for propane at 550 DEG C can still reach or exceed 97%, and the catalyst shows good high-temperature hydrothermal stability.

The invention provides a splicing material, a silicon carbide honeycomb ceramic and a preparation method and application, and relates to the technical field of honeycomb ceramics, a high water proportion is adopted, the viscosity of the splicing material is reduced, the permeability of a second-class binder is improved, in the standing process after splicing, the second-class binder can permeate into the skin of a unit strip and is cured, and the surface layer of the unit strip is solidified; and the bonding strength of the splicing material is improved. Meanwhile, the content proportion of the ceramic fibers is extremely high, the high-content ceramic fibers can support the splicing material, the splicing material does not need to be sintered, the technological process is reduced, meanwhile, the influence of shrinkage caused by sintering on the thermal shock resistance and the mechanical strength can be avoided, and the service life of the splicing material is prolonged. And after drying, the ceramic has the bonding strength after sintering and higher thermal shock resistance and mechanical strength. In addition, no pore-forming agent is added in the formula of the splicing material disclosed by the invention, so that the stress or shrinkage during sintering can be balanced without using pores of the pore-forming agent during sintering.

The application discloses honeycomb ceramic and a preparation method thereof. A composite additive is added into mixed ceramic raw materials, and the weight ratio of the mixed ceramic raw materials to the composite additive is (30-50):(50-70). The composite additive comprises 30-54 parts of flaky alumina, 2-10 parts of nano-zinc oxide and 1-5 parts of metal molybdenum particles. The honeycomb ceramic is prepared through ball milling, kneading, refining, extrusion forming, drying and sintering. The application replaces bauxite with flaky alumina, adds beneficial additives, i.e. nano-zinc oxide and metal molybdenum particles, and uses the original extrusion forming equipment to realize the layered structure of the flaky alumina, thereby building a shell-like pearl layer structure with the layered alumina as a "brick", the metal molybdenum particles as "mud" and the zinc-aluminum spinel particles as "protrusions".

The invention belongs to the technical field of rectification of dipropylene glycol, and relates to a rectification process of dipropylene glycol. The process comprises the following steps: preheating a crude product raw material containing dipropylene glycol, then feeding the crude product raw material into a pre-separation tower for pre-rectification, then feeding tower bottoms of the pre-separation tower into a packed tower for rectification, and extracting from the tower top of the packed tower to obtain a dipropylene glycol product; the interior of the packed tower is sequentially filled with modified ceramic corrugated packing, a stainless steel wire net and modified molecular sieve packing from bottom to top; the modified ceramic corrugated filler is obtained by sequentially acidizing a ceramic corrugated filler and loading SiO2 / CeO2; the modified molecular sieve filler is obtained by alkalization, calcination and SiO2 / Al2O3 loading of molecular sieve honeycomb ceramics in sequence. Through the modified ceramic corrugated filler, the stainless steel wire mesh and the modified molecular sieve filler which are sequentially arranged from bottom to top, the material transfer efficiency, the component separation precision and the operation stability of the device in the crude product raw material rectification process are optimized, and the overall process efficiency is effectively improved.

The application discloses a manganese-cobalt spinel catalyst preparation and application in catalytic ozonation VOCs, belonging to the field of material technology. The application comprises the following steps: manganese salt and cobalt salt are added into water and ultrasonically dissolved, a honeycomb ceramic substrate is grown in the obtained solution, the treated honeycomb ceramic substrate is taken out after the solution becomes light purple; the dipping is repeated for three times; the honeycomb ceramic substrate after the dipping treatment is dried and calcined; the honeycomb ceramic substrate after the calcination is soaked in an acetic acid solution, then the excess solution in the pore is blown away, then the honeycomb ceramic substrate is dipped in a lanthanum salt solution, the excess solution in the pore is blown away after the honeycomb ceramic substrate is taken out, the honeycomb ceramic substrate is dried, and the honeycomb ceramic substrate is calcined again after being heated, so that the manganese-cobalt spinel catalyst is obtained. The manganese-cobalt spinel catalyst prepared by the method has 100% catalytic decomposition activity on toluene, methanol and propylene at room temperature, and has 100% catalytic decomposition activity on ethyl acetate at 53 DEG C. Further simulation of the real environment test results show that the catalytic ozonation decomposition efficiency of the manganese-cobalt spinel catalyst on toluene, xylene and ethyl acetate reaches 100% at room temperature.