239 results about "Honeycomb ceramic" patented technology

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 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 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 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.

The invention discloses a rhizoma polygonati flavone extraction system and process, and relates to the technical field of rhizoma polygonati component extraction, and the process comprises the following steps: selecting rhizoma polygonati tubers, grading the rhizoma polygonati tubers, and respectively carrying out flavone extraction pretreatment and flavone extraction treatment on each grade of raw materials, the polygonatum kingianum tubers with the same total segment number are divided into the same age limit group; the polygonatum sibiricum tubers in all the groups with the same age limit are split along the joint of the segments, and all the split segments are numbered; randomly selecting a certain proportion from the numbered raw material sections as a sample for flavone content detection, and taking an arithmetic mean value as a flavone nominal content of the raw material section; and performing multi-stage raw material division according to the flavone nominal content of each raw material section. According to the process, the dissolution rate and the purity of flavone are improved, an extraction system matched with the process enables all levels of raw materials to be orderly treated according to levels, and the industrialization value and the product competitiveness of polygonatum sibiricum flavone extraction are improved.

The invention discloses a movable electric heat storage device which comprises a container. The heat storage device is arranged in the first mounting area in the container, and the heat storage device comprises a plurality of honeycomb ceramic heat accumulators and a heater in heat conduction connection with the honeycomb ceramic heat accumulators; the power distribution device is arranged in the second mounting area in the container, electrically connected with the heater and used for being connected with an external power source and supplying power to the heater; the heat exchange device is arranged in the third mounting area in the container and comprises a heat exchanger and a circulating pump, the heat exchanger is in heat conduction connection with the honeycomb ceramic heat accumulators through heat conduction pipes, and the circulating pump is used for controlling flowing of working media in the heat conduction pipes; the power interface and the thermal interface are arranged on the side wall of the container, the power interface is electrically connected with the power distribution device, and the thermal interface is connected with the heat exchanger. The mobility and rapid deployment of heat storage equipment are achieved, and meanwhile efficient and stable heat energy storage and release are achieved through the solid heat storage technology.

The utility model relates to the technical field of ceramic products, in particular to a slotted hole honeycomb ceramic heat accumulator which comprises a supporting outer frame and slotted holes formed in the supporting outer frame. The supporting outer frame comprises 1-3 rows of rectangular holes arranged around the slotted hole in the radial direction. The cross-sectional area of the rectangular hole is at least less than half of the cross-sectional area of the slotted hole; a plurality of slotted hole bulges are arranged in each slotted hole; a clamping groove protrusion is arranged on the outer side of the supporting outer frame. The clamping groove protrusions between the adjacent slotted hole honeycomb ceramic heat accumulators define splicing holes. The slotted hole honeycomb ceramic heat accumulator has the advantages that after the slotted hole honeycomb ceramic heat accumulator is assembled through the clamping groove protrusions, vent holes of a certain size are reserved between the outer walls, and the rectangular holes of the supporting outer frame enable the structure of the supporting outer frame to be more stable and firmer. The design of the clamping groove protrusions and the groove holes of the supporting outer frame enables the gas distribution capacity in the heat accumulator to be kept, the defect that local pressure drop is too high is overcome, and the heat efficiency of the system is improved.

The utility model discloses a honeycomb ceramic carrier support for an automobile exhaust purifier, which relates to the technical field of automobile exhaust purification equipment and comprises a cylindrical support, a plurality of groups of trapezoidal plates are fixedly mounted on the inner wall of the cylindrical support, and a plurality of groups of elastic cushions are arranged in the cylindrical support. And three groups of buffer springs are fixedly mounted at one end of each group of trapezoidal plates. According to the utility model, the arc-shaped supporting blocks connected with the buffer springs are arranged on the inner wall of the cylindrical bracket, and the elastic buffer pads are arranged on the inner arc surfaces of the arc-shaped supporting blocks, so that the honeycomb ceramic carrier can be stably supported and effectively damped, and the influence of vibration and impact on the honeycomb ceramic carrier in the running process of an automobile is reduced; and secondly, the semicircular baffles are installed at the two ends of each set of arc-shaped supporting blocks, the two ends of the honeycomb ceramic carrier can be limited, the two ends of the honeycomb ceramic carrier can be fixed conveniently, and the honeycomb ceramic carrier is prevented from moving in the cylindrical support.

The application relates to a preparation method of a high-temperature-resistant high-space-velocity VOCs catalytic combustion catalyst for acid ester waste gas and the catalyst, and belongs to the field of industrial waste gas treatment. The catalyst takes noble metal, transition metal oxide and rare earth oxide as active components, takes honeycomb ceramic or metal honeycomb as a carrier, and is prepared by adopting a coating process. First, Ce x Zr 0.6‑x La y Pr 0.1‑ y O2 is prepared by using lanthanum nitrate hexahydrate, praseodymium nitrate hexahydrate, cerium nitrate hexahydrate and zirconium nitrate pentahydrate; then, La-Al2O3 is prepared by using lanthanum nitrate hexahydrate and Al2O3 through an equal-volume impregnation method; and finally, the catalyst is prepared by using Ce x Zr 0.6‑x La y Pr 0.1‑ y O2, La-Al2O3 and noble metal. The catalyst has the characteristics of high low-temperature activity, good thermal stability and high purification efficiency for catalytic combustion of volatile organic compounds of acid esters at high space velocity.

The preparation method comprises the following steps: mixing a base material containing gamma-Al2O3, gamma-Al2O3 nanofibers, a pore forming agent and a binder according to a certain ratio, and carrying out drying, high-temperature calcination, chemical modification and other processes to prepare a micron honeycomb and nanofiber network ceramic carrier. Meanwhile, through modification of a silane coupling agent, polar groups are introduced to the surface of the catalyst, and the adsorption capacity of the catalyst to polar organic matter such as phenols, ammonia nitrogen and cyanide and ionic pollutants is improved. Finally, the active center of the catalyst is increased through double doping of manganese and copper, and the ozone catalytic oxidation performance is improved. The prepared catalyst is simple in preparation process, good in ozone catalytic oxidation effect and wide in market prospect.

The invention discloses an indoor hydrogen elimination device, and relates to the technical field of indoor hydrogen elimination, the indoor hydrogen elimination device comprises a hydrogen elimination mechanism, a gas inlet mechanism is arranged on the left side of the hydrogen elimination mechanism, a condensation mechanism is arranged on the right side of the gas inlet mechanism, and the left side of the condensation mechanism is matched with the right side of the hydrogen elimination mechanism; the hydrogen elimination mechanism comprises a shell, an inner container is arranged in the shell, an insertion block is fixedly connected to the bottom of the inner wall of the inner container, a plurality of carrier plates are inserted into the insertion block and are made of cordierite honeycomb ceramics, the tops of the carrier plates are fixedly connected with the same fixing plate, and the same fixing plate is fixedly connected with the inner wall of the inner container. The top of the fixing plate is attached to the top of the inner wall of the inner container, and the right side of the shell is fixedly connected with an air outlet. According to the indoor hydrogen elimination device, gas is evenly mixed through the spiral flow guide fins, hydrogen and oxygen in the gas are subjected to a surface chemical reaction under the action of a palladium catalyst for hydrogen elimination, and water vapor is cleaned through a condensation plate.

The invention relates to the technical field of waste gas separation treatment, in particular to a waste gas three-way catalytic treatment device for rare earth treatment, which comprises a first catalytic cylinder, a second catalytic cylinder and a precipitation tail bin, and waste gas is treated through the first catalytic cylinder, the second catalytic cylinder and the precipitation tail bin in sequence; a first catalyst honeycomb ceramic is arranged in the first catalysis cylinder, and a second catalyst honeycomb ceramic is arranged in the second catalysis cylinder; according to the waste gas three-way catalytic treatment device, special purification treatment can be conducted on three kinds of waste gas generated in the rare earth treatment process, and gas pollution generated in the rare earth treatment process is effectively reduced.