105results about How to "No need to dry" patented technology

The invention discloses a method for preparing nitrogen-doped porous carbon by taking cottonseed hull as a raw material and application. The method is characterized in that the nitrogen-doped porous carbon material is prepared by taking the cottonseed hull as a raw material and urea as a nitrogen source, stirring and uniformly mixing the substances with a sodium hydroxide solution, and then carrying out high-temperature carbonization and activation. An electron microscope photo shows that the prepared nitrogen-doped porous carbon material is of a three-dimensional inner cross-linking network structure. XPS and elemental analysis show that the nitrogen element is successively and uniformly doped in a carbon matrix; the XPS analysis shows that the nitrogen content is 1.84 to 7.35%; the elemental analysis shows that the nitrogen content is 2.07 to 6.52 % and the specific surface area is 1010 to 2500m<2> / g. The super-capacitor experiment shows that the prepared nitrogen-doped porous carbonmaterial has good electrochemical properties and the specific capacitance can reach 320 to 340F / g (current density is 0.5A / g). The method has the advantages of simplicity in preparation, wide range of renewable resources as raw materials, low price, low cost, easiness in large-scale industrialization application and capability of being applied to the field of energy storage.

The invention provides a catalyst used as a titanium-silicate molecular sieve in the process of preparing epoxide from olefin and hydrogen peroxide. The invention is characterized by comprising the following steps: washing with or without a small amount of methanol solvent; purging the catalyst cake with steam directly after reaction; extracting few organic matters absorbed in the catalyst; then stirring in a regenerating kettle and dropwise adding H2O2 with a certain concentration simultaneously; removing the organic matters and low polymers absorbed on the catalyst and in a pore path through oxidative decomposition; and finally, washing with a small amount of methanol or deionized water to remove the organic acid generated by oxidation on the surface of the catalyst. The regenerated catalyst can be circularly used for the epoxidation reaction of olefin to stably maintain the activity of the epoxidation reaction.

The invention discloses a method for preparing metal soft magnetic powder core by adopting inorganic insulation adhesive particles. The method includes steps of 1), matching and mixing the metal soft magnetic powder according to particle size of the powder; 2), adding passivant into the magnetic powder matched in the step 1) and for passivating treatment; 3), mixing the inorganic insulation particles with passivated magnetic powder intensively and directly; 4), adding insulating compound 0-0.1 in weight percentage; 5), moulding mixture obtained in the step 4) at 1200-2500MPa, placing blank samples in a protective atmosphere and subjecting the blank samples to thermal insulation at the temperature of 400-800 DEG C for 0.5-3 hours prior to air cooling and spraying to obtain target products. An inorganic adhesive coating process adopted in the method is pollution-free to environment, passivated films are even and clean, the products after annealing are high in tensile strength with no need for solidification, so that production efficiency is improved. Besides, comprehensive performance of the products is good and above the industry standard.

The invention discloses a method and a device for producing crude antimony trioxide by smelting of a rich oxygen side-blown volatile molten pool. The method comprises the following steps: by taking an antimonial material as a raw material, blind coal or coke or a natural gas or a coal gas and the like as supplement fuel, and iron ore and lime as fluxes, blowing oxygen-enriched air, entering a furnace to react after metering a charging material, so as to produce high-temperature smoke and melt; condensing and dedusting the high-temperature smoke, and then feeding the smoke to an acid making system to prepare an acid, wherein the condensed powder is a crude antimony trioxide product to feed to the next procedure to process; respectively discharging the high-temperature melt after settling and layering in a hearth; quenching the slag to be directly used as a waste slag, and returning a little of produced antimony matte and crude antimony; and feeding noble antimony to the next procedure to process and extract gold. The invention also comprises a device for producing crude antimony trioxide by smelting of a rich oxygen side-blown volatile molten pool. The device has the advantages of being strong in raw material adaptability, low in energy consumption, high in smoke SO2 concentration, high in direct recovery rate and recovery rate of antimony and noble metal, clean and environment-friendly to produce, low in production cost and the like, and the acid can be directly prepared.

The invention discloses special cotton fertilizer produced by using biochemical fulvic acid through melt granulation, relating to the technical field of special fertilizer of crop formula. The special fertilizer is obtained by taking 450-650 parts of nitramine phosphorus, 50-160 parts of potassium chloride, 80-300 parts of potassium sulfate, 50-150 parts of monoammonium phosphate, 1-100 parts of biochemical fulvic acid, 1-15 parts of EDTA (Ethylene Diamine Tetraacetic Acid) chelating zinc, 1-15 parts of EDTA chelating manganese, 1-20 parts of EDTA chelating iron, 1-20 parts of borax and 0.1-0.5 part of ammonium heptamolybdate as raw materials, mixing, stirring, heating, granulating, cooling and screening. The special fertilizer disclosed by the invention has the advantages of comprehensive nutrients, favorable water solubility, greenness, no pollution, high utilization rate, improvement on soil, increase of crop yield and improvement on quality.

The invention discloses a highly dispersed palladium / carbon nanometer tube catalyst for anthraquinone hydrogenation and a preparation method thereof, and relates to a catalyst and a preparation method. According to the invention, a carbon nanometer tube industrial product with good conductivity, heat conductivity, high mechanical strength and huge external specific surface is used as a palladium carrier; simultaneously ultrasonic is utilized to further enhance the dispersity and uniformity of palladium and the carbon nanometer tube; and a nanometer palladium catalyst uniformly loaded on the surface of the carbon nanometer tube is prepared in a slurry reactor by adopting a liquid phase reduction method. The catalyst needs no extrusion molding and can be directly suspended in the liquid phase for normal-pressure or pressurized hydrogenation of anthraquinone; the activity of the catalyst is not reduced after the catalyst is used for a plurality of times by filtration and separation; moisture, acid and alkaline do not influence the use effect; the catalytic activity of the new catalyst is 4-8 times higher than that of the traditional Pd / gamma-Al2O3 catalyst, and the amount of the catalyst used can be greatly reduced. The catalyst can be used for replacing the traditional catalyst, the post treatment of the traditional catalyst is simplified, the treatment capability of a device is greatly increased, and the operation cost is lowered.

The invention provides far infrared energy saving coatings, containing component A and component B, wherein the component A contains components of following weight parts: 30-40 parts of black silicon carbide, 20-30parts of cupric oxide, 5-10parts of quartz sand, 10-20 parts of cabosil, and 0.01-0.10 parts of nanometer silicon carbide; and the component B is silica sol; and the ratio by weight of component A to component B is from 1:1 to 2. The energy-saving coatings of the invention overcomes disadvantages of low radiation efficiency, low unsteady radiation rate, long drying time and short service life in high-temperature zone in prior art, and furtherly raises energy-saving efficiency.

The invention relates to an oxygen-increasing slow-release fertilizer. The fertilizer is prepared from a urea peroxide-beta-cyclodextrin inclusion compound, urea peroxide (Perurea: CO(NH2)2.H2O2) and beta-cyclodextrin which are in effective quantities, wherein the urea peroxide-beta-cyclodextrin inclusion compound takes urea peroxide as a kernel and takes beta-cyclodextrin as an outer layer. According to the slow-release fertilizer disclosed by the invention, the oxygen content is high and can reach 17-20%; and after the slow-release fertilizer disclosed by the invention is used, the oxygen release is sustained, mild, stable and controllable and can sustain 300 hours per 100g of urea peroxide in net content. The slow-release fertilizer disclosed by the invention has the advantages that the oxygen release manner is slow, mild and stable, is stronger in activity and strong in disinfection and can be used for easily eliminating diseases and pests from potted landscapes, so that the normal survival ratio of potted plants is increased effectively; and meanwhile, the slow-release fertilizer disclosed by the invention has effects on increasing, disinfecting and cleaning indoor oxygen and has incomparable superiority compared with currently reported relevant research results and new products on the market.

The invention relates to a fertilizer, in particular to a selenium urea formaldehyde roller pelleting compound fertilizer and a production method thereof. After selenium urea formaldehyde is added into the compound fertilizer, agricultural products enriched in selenium cannot only be produced; because a nitrogen element and a selenium element in the selenium urea formaldehyde are chelated, the selenium urea formaldehyde roller pelleting compound fertilizer has a certain release function, and the fertilizer efficacy time is long so as to improve the yield of the crops. On the other hand, the compound fertilizer adopts circulation cooling in the production process and the cooling process, so that fertilizer particles are fully cooled, along with the adhesion of the selenium urea formaldehyde, so that the particle hardness of the compound fertilizer product is high, less water content is introduced into the production without drying, so as to greatly save energy sources.

The invention discloses a metal strip cleaning system. The metal strip cleaning system comprises a cleaning machine frame and a water tank, wherein a cleaning conveyor belt stretching horizontally is arranged on the cleaning machine frame; a cleaning device is arranged in the front of the cleaning conveyor belt; a rinsing device is arranged in the middle of the cleaning conveyor belt; a hot air drying device is arranged in the rear of the cleaning conveyor belt; the cleaning device comprises a cleaning water pump and a cleaning water pipe; the cleaning water pump is connected with the water tank; the pipe head of the cleaning water pipe faces to the cleaning conveyor belt; the cleaning water pipe jets a high-pressure water column; a wastewater containing trough is arranged below the cleaning water pipe; the hot air drying device comprises a hot air blower and a hot air nozzle; the hot air nozzle faces to the cleaning conveyor belt; the hot air nozzle blows high-pressure hot air; the water tank comprises a filter screen, an electric heater, a temperature regulator, a temperature sensor and a level controller. The metal strip cleaning system has the advantages of good cleaning effect, capability of regulating the temperature of cleaning water and capability of blowing a cleaned metal strip.

The invention discloses a modified polystyrene material which comprises the following raw materials in percentage by weight: 65-90% of polystyrene resin, 8-30% of styrene-butadiene copolymer and 1-5% of liquid paraffin. The raw materials according to the formula are proportionally added, and a mixer is started to mix the raw materials for 5 minutes; and the mixture can be directly put into a common injection molding machine for production without drying the raw materials. The transparency of the modified GPPS (general purpose polystyrene) material disclosed by the invention remains the transparency of the original GPPS material, the elongation at break is enhanced from 2% to 5%, and the impact strength can be enhanced from 3KJ / m<2> to 15KJ / m<2>.

The invention provides a method for synthesizing solid polyacrylic-series water reducing agents by the aid of microwaves at one step. The method includes adding unsaturated polyoxyethylene ether into a reactor with a stirring device; melting the unsaturated polyoxyethylene ether under microwave conditions, then sequentially adding chain transfer agents, unsaturated carboxylic acid and initiators into the reactor; stirring the unsaturated polyoxyethylene ether, the chain transfer agents, the unsaturated carboxylic acid and the initiators at the temperatures of 20-70 DEG C for 10-30min, and then stopping the polyoxyethylene ether, the chain transfer agents, the unsaturated carboxylic acid and the initiators from reacting with one another; cooling reaction products of the polyoxyethylene ether, the chain transfer agents, the unsaturated carboxylic acid and the initiators until the temperatures of the reaction products reach the room temperature so as to obtain the solid polyacrylic-series water reducing agents. The method has the advantages that microwave equipment with a stirring function is utilized in procedures for preparing the solid polyacrylic-series water reducing agents, so that various materials which participate in reaction can be uniformly mixed with one another without water or other organic solvents, and can completely react with one another, and the solid polyacrylic-series water reducing agents with excellent performance and the content nearly equal to 100% can be obtained under the conditions of specific microwave reaction frequencies, reaction power and reaction time.

The invention belongs to the technical field of environmental protection, and particularly relates to an online atmospheric fine particulate matter concentration and collection device and method. Thedevice comprises a PM2.5 cutting head, a water tank system, a virtual cutting system, a condensation circulating system and an online concentrated sample collection system, wherein the water tank system comprises a water tank, an electric heating rod and a temperature control digital display device, the PM2.5 cutting head is communicated with the water tank, the virtual cutting system comprises avirtual cutter, a concentrated airflow vacuum pump and a main airflow vacuum pump, the condensation circulating system comprises a condensing agent circulating pipe and a condenser, the condensation circulating system is used for circulating condensate to condense and grow up saturated particulate matters, and the online concentrated sample collection system comprises a biological sampling bottle,an electromagnetic valve, a relay, an automatic fraction collector and a computer subdivision constant flow pump. The device can concentrate the actual atmospheric fine particles by 7-10 times, and the concentration efficiency is high; technical support can be provided for subsequent online chemical component or toxicity detection; and the device is simple and convenient to operate, reliable, stable and low in maintenance cost.

The invention relates to planting sand prepared by utilizing sludge and a preparing method thereof. The planting sand is prepared from, by weight, 100 parts of solid waste, 15-30 parts of a pore forming agent, 5-15 parts of a plasticizer and 1-2.5 parts of a reinforcing agent, wherein the solid waste is one or more of fly ash, coal gangue, slag, tailings and waste residues, and the pore forming agent is one or more of household sludge, papermaking sludge and river sludge. The planting sand is prepared through mixing, granulation, drying, sintering and cooling steps. The prepared planting sandhas a uniform particle size, a high degree of sphericity, high cylinder compressive strength, and long service lifetime. The water absorption rate of the planting sand is 60-80%. The planting sand hasgood water retaining and fertilizer retaining properties, and water and fertilizers can be uniformly distributed.

The invention discloses a grain flat paving machine. The grain flat paving machine comprises a grain sunning tank; and the grain sunning tank includes a horizontal tank bottom, and a tank wall around the tank bottom. The grain flat paving machine further comprises a pushing plate positioned on the tank bottom, and a transmission mechanism for driving the pushing plate to perform a reciprocating motion; the pushing plate includes a fixed plate, and a slide plate; a chute is formed in the fixed plate; and the slide plate slides up and down in the chute. After grains are poured in the grain sunning tank, the pushing plate is driven by the transmission mechanism to perform a reciprocating horizontal motion to flatly pave piled grains, so that the grains are fully sunned; and the grain sunning tank needs no manual operation, so that the production efficiency is high, and the labor intensity is low. Meanwhile, the slide plate also can slide up and down to adjust the distance to the tank bottom, so that the grains are flatly paved to different thicknesses according to demands.

A continuous and batch system to produce cellulose, native lignin and unicellular protein from any form of vegetation in a closed process. The biomass is mixed in the impregnate solution of nitric acid and / or ammonium hydroxide and water. After a period of time at room temperature and atmospheric pressure the chemical solution is recycled. The biomass is moved to the reactor and heated. Evaporated impregnate is recovered via absorption tower and recycled back to chemical solution. The biomass is moved to an alkaline solution, then cooled to separate pulp from black liquor. The black liquor is pumped to a separation tank and is treated to precipitate lignin. The solution is filtered to separate sweet liquor and lignin. The lignin is dried and the sweet liquor is fermented to produce unicellular protein.

The invention discloses a dexibuprofen sustained-release tablet and a preparation process thereof. According to the preparation process, colloidal silicon dioxide is used as an antiplastering aid, and dry granulation is carried out by using a high-speed rotary tablet press; the prepared dry granules are respectively mixed with auxiliaries in specific quick-release and sustained-release layers to press a dual-layer tablet which is the dexibuprofen sustained-release tablet. The preparation process can be used for effectively reducing the sticking phenomenon caused by temperature increase when tabletting is carried out for a long time, and has simple process and relatively high efficiency; and the prepared sustained-release tablet has high bioavailability and good stability.

The invention belongs to the technical field of simulating compression resistance of a homogeneous rock model, and discloses a homogeneous rock model with uniaxial compressive strength of 20-30 MPa, and a preparation method. The homogeneous rock model comprises an upper-layer homogeneous rock model body, a molding layer, a lower-layer homogeneous rock model body and a cavern, wherein the upper-layer homogeneous rock model body and the lower-layer homogeneous rock model body are connected to form a homogeneous rock model body in a binding manner through the molding layer, and the cylindrical cavern is arranged in the center of the homogeneous rock model body. After absorbing free moisture, a molding material is naturally dried in the hardening process, free from roasting, and suitable for large-area binding. Furthermore, the through connection between broken cracks of an upper half model and a lower half model can be guaranteed by the crispy molding material and a model material which have identical physical properties, and the identical breaking shapes of the upper half model and the lower half model can be guaranteed.

The invention relates to a dual-surface printer, which comprises two planet printers, wherein the central compress rollers of printers are parallel mounted; there are two transverse bake channels above the printers; two bake layers are layered inside the bake stove. The invention can print without drying inter-color; and the paths of two times of drying can be reversed and layered, to shorten the base material path. And the invention also provides a relative printing method.

The invention discloses a method for recovering white mud and a tunnel type calcinating kiln using the same. The method is to recover white mud by subjecting a great deal of white mud generated as a by-product in the production of pulp and paper enterprises to water filtration, mud regulation, brick making, car loading, calcination and kiln discharge and other processes and to calcine the white mud in the tunnel type calcinating kiln at a temperature of between 1, 050 and 1, 250 DEG C, which solves the problem of difficult recovery of white mud. The method has the advantages of simple process, energy conservation, high recovery and low cost.

The invention relates to an efficient impurity removing and crushing process of a semi-molten bottom seed crystal and belongs to the field of production and preparation of silicon materials. The efficient impurity removing and crushing process comprises the following steps: 1, material taking 2, impurity removal for the first time; 3, temperature rise pretreatment; 4, cooling pretreatment; 5, silicon material crushing; 6, impurity removal and the like. The efficient impurity removing and crushing process provided by the invention has the beneficial effects that by adopting alternate cooling and heating and applying a negative temperature value to the production process, a good impurity removal effect is realized; the process steps are simplified, drying is not needed, the occurrence of water stains is further eliminated, and the risk of the water stains does not exist; the production efficiency is good, so that the recovery rate is greatly improved.

The invention discloses a processing method for a high-efficiency polyester nonwoven thermal insulation material, comprising the following steps: (1) carrying out aminolysis modification treatment on a polyester nonwoven fabric, and dewatering to form into the polyester nonwoven fabric which is carried out by aminolysis and modification with 40%-80% of mangle expression; (2) putting the polyester nonwoven fabric which is carried out by aminolysis and modification with 40%-80% of mangle expression into sol working solution to carry out an impregnation technology; and (3) adding 5%-10% (volume fraction) of perfluorinated compound into the working solution of the impregnation technology to improve the spontaneous water discharge capability of a capillary tube when the gel formed by the impregnation technology is dried, replacing the self removal of the solvent by nonpolar solvent through solvent, and drying in the manner of stepped heating and drying to obtain the high-efficiency polyester nonwoven thermal insulation material. According to the processing method, due to the technical means of the in-situ gelation, the problem that the fiber and the gel cannot be completely combined and easy to have the mechanical defect can be overcome, and the mechanical property of the thermal insulation material can be improved.

The invention relates to an oxygen-enriched controlled-release fertilizer which is characterized by consisting of a urea peroxide-beta-cyclodextrin complex with an effective quantity, urea peroxide (Perurea: CO(NH2)2.H2O2) and beta-cyclodextrin, wherein in the urea peroxide-beta-cyclodextrin complex, urea peroxide is used as an inner core, and beta-cyclodextrin is used as an outer layer. The oxygen-containing activity amount of the controlled-release fertilizer is high and can reach 17%-20%; and after being applied, the oxygen-enriched controlled-release fertilizer can continuously, moderately, stably and controllably release oxygen, and 100g of the fertilizer (the net content of Perurea) can continuously release oxygen for 300 hours. The controlled-release fertilizer has the advantages of slow, moderate and stable oxygen-enrichment mode, strong activity degree and strong antiseptic property, and is easy to eliminate the diseases in bonsai, thereby effectively improving the normal survive rate of a bonsai plant; and simultaneously, the oxygen-enriched controlled-release fertilizer has the effects of indoor oxygen enrichment, cleaning and disinfection; and compared with the relatedresearch results reported at present and novel products supplied by a market, the oxygen-enriched controlled-release fertilizer has incomparable superiority.

The invention discloses a polymer microsphere modifying and flooding agent for a high-temperature and high-salinity oil reservoir as well as a preparation method and application of the polymer microsphere modifying and flooding agent. The modifying and flooding agent is prepared from an oil-soluble emulsifier, an oil-soluble unsaturated diene monomer, an acrylamide monomer, an aromatic ring-containing olefin monomer, a water-soluble emulsifier, an oil-soluble initiator, a cross-linking agent, water and an oily solvent through water-in-oil-in-water double emulsion polymerization. The polymer microsphere profile modifying and flooding agent prepared by the invention is not easy to degrade in a medium with high mineralization degree, molecules of the modifying and flooding agent do not contain groups easy to hydrolyze, so that the rigidity of a polymer molecular chain is increased, the tackifying, salt resistance and temperature resistance of a polymer are improved, and meanwhile, the polymer microsphere modifying and flooding agent is relatively high in breakthrough pressure gradient, relatively strong in expansibility and relatively good in plugging performance; the preparation process is simple, and drying and granulation processes after the conventional polymer microsphere modifying and flooding agent is prepared are omitted.

The invention discloses an automatic waxing system for leather. The automatic waxing system for the leather comprises a rack, a material loading device, a leather cleaning device, a leather waxing device, a leather drying device, a leather polishing device and a leather collection device, wherein the leather cleaning device comprises a water tank, a first driving roller arranged in the water tank,a second driving roller corresponding to the first driving roller, a cleaning element sheathed to the first driving roller and the second driving roller, a first driving element for driving the firstdriving roller to rotate, a cleaning mechanism used for cleaning the cleaning element, and a pressure mechanism used for pressing the leather to the second driving roller; the leather driving devicecomprises a drying box arranged on the rack, a warm air machine, an air sending mechanism and a material outlet arranged on the side wall of the drying box. Through the warm air machine, hot air can be introduced into the drying box so as to blow the leather in the drying box, liquid wax is quickly solidified without drying , and leather waxing efficiency is improved.

The invention discloses a device and method for improving urea formaldehyde compound fertilizer on an amino acid compound fertilizer production line. The device comprises a urea formaldehyde reaction tank, a formaldehyde storage tank, a urea formaldehyde storage tank, an ammonium chloride tank, an alkali tank, a urea formaldehyde delivery pump, an electromagnetic flowmeter, a granulation sprayer and a rotor drum granulator, wherein the urea formaldehyde reaction tank comprises a reaction tank with a speed reducer and an electric agitator, a steam pipe and a jacket; the urea formaldehyde storage tank and the ammonium chloride tank are connected with a feed port of the urea formaldehyde reaction tank, and a discharge port of the urea formaldehyde storage tank is connected with the rotor drum granulator through the urea formaldehyde delivery pump, the electromagnetic flowmeter and the granulation sprayer. Prepared urea formaldehyde suspension is sent to a storage tank through an agitator pump and then pumped to a roller granulator for compound fertilizer granulation, the urea formaldehyde suspension is not required to be dried, a large amount of energy is saved, and the device and the method are adapted to production of the urea formaldehyde compound fertilizer by appropriate modification of the amino acid compound fertilizer production line.

The invention relates to a dry method for preparing oxidized starch by microwave. In the preparation method, starch and an oxidant are used as raw materials; and the oxidation reaction of the starch is initiated and catalyzed by using special thermal effect and non-thermal effect of the microwave in a microwave filed to prepare the oxidized starch. The preparation method comprises the following steps of: pouring the starch into a mixer, starting the mixer, spraying 1 to 30 percent oxidant in an amount which is 1 to 20 percent of the mass of the starch and uniformly mixing the starch and the oxidant; and putting the mixture into a microwave reactor, and initiating and catalyzing reaction by microwave radiation to obtain a finished product of the oxidized starch. Compared with the prior art, the dry method for preparing the oxidized starch by the microwave has the characteristics of simple and safe operation, low reaction temperature, short time, high efficiency, low energy consumption, environmental protection, no pollution, uniform starch oxidation, no need of drying, large-scale continuous production and the like, and is a simple, high-efficiency, energy-saving and environmental-friendly method for preparing the oxidized starch.

The invention discloses a cleaning device with high efficiency and low consumption for a guiding rail. The cleaning device with the high efficiency and low consumption for the guiding rail comprises adust removing shell body, a top cleaning assembly and a blade surface cleaning assembly. A dust collecting pipeline is arranged at the bottom of the dust removing shell body; the top cleaning assembly comprises a first portal supporting frame, a swinging frame, a guiding rubber roller and a first cleaning block; the first cleaning block is arranged in the back of the bottom of the swinging frame;the blade surface cleaning assembly comprises a second portal supporting frame, a calliper device and second cleaning blocks; the calliper device is arranged on the second portal supporting frame andfixing seats are respectively arranged on calliper arms; elastic mounting plates are respectively arranged at the inner sides of the fixing seats and the second cleaning blocks are respectively arranged at the side surfaces of the elastic mounting plates. By means of the abovementioned manner, the cleaning device with the high efficiency and low consumption for the guiding rail is high in efficiency, needless to dry, low in energy consumption, incapable of producing waste water and capable of realizing energy conservation and environment protection.

The invention relates to double-face printing equipment which comprises two satellite type printing units. Installation directions of center compression rollers of the two satellite type printing units are parallel; and two drying tunnels with the walking direction being the transverse direction are arranged above the two satellite type printing units, are stacked vertically, and are arranged inside one drying box. By means of the double-face printing equipment, double-face satellite type printing can be carried out without between-color drying, the directions of routes of two times of drying can be opposite, the positions of the routes of two times of drying can be vertically stacked, the advancing route of a base material in the printing process is short, and the floor area of production can be saved. The invention further provides a double-face printing process using the above equipment.

The invention belongs to the technical field of environmental protection, and particularly relates to a device and a method for online measurement of trace water-soluble ions by concentrating and collecting atmospheric fine particles. The device comprises a PM2.5 cutting head, a water tank heating system, a virtual cutting system, a condensation circulating system and an online measuring system, wherein a water tank system comprises a water tank, an electric heating rod and a temperature control digital display device, the PM2.5 cutting head is communicated with the water tank, the virtual cutting system comprises a virtual cutter, a concentrated airflow vacuum pump and a main airflow vacuum pump, the condensation circulating system comprises a condensing agent circulating pipe and a condenser, the condensation circulating system is used for circulating condensate to condense and grow up saturated particulate matters, and the online measuring system comprises a biological sampling bottle, a computer subdivision constant flow pump and an online ion chromatography. The device can concentrate the actual atmospheric fine particles by 7-10 times, and the concentration efficiency is high; the sample can be directly collected and used for subsequent online analysis; and the device is simple and convenient to operate, reliable, stable and low in maintenance cost.