5034 results about "Dehydration" patented technology

A system for dehydration of organic material comprises a housing structure having an interior chamber, a supply duct, a dual trunk structure, a dry air intake, a central recirculation duct, and a plurality of side recirculation ducts. The side recirculation ducts each have a return plenum extending downward from a top recirculation duct and are configured to recirculate interior air contained in the chamber. The interior air enters the side recirculation ducts through the return plenums and is pushed upward and outward through the top recirculation ducts and back into the interior chamber. The interior chamber has a plurality of exhaust vents positioned in the upper region of its walls. A plurality of portable platforms positioned inside the interior chamber are configured to hold the organic material. The floor of the housing structure can include a plurality of tracks for loading, unloading and positioning the portable platforms.

The invention discloses a catalyst used for preparing acrylic acid and butyl ester by the dehydration of butyl lactate and a preparation method thereof. The catalyst is a composite catalyst, comprising a main catalyst A and auxiliary catalysts B, C, D and E, wherein, A is calcium sulphate, B is sulphuric acid, C is phosphate, D is alkaline matter and E is promoter. The preparation method comprises the steps as follows: five compositions A, B, C, D and E are sufficiently mixed, baked for 2-10 hours at the temperature of 200-800DEG C and formed for standby. The catalyst has high catalytic activation; under the catalysis of the catalyst, the molar yield reaches 75.1 percent and the molar selectivity of the acrylic acid and butyl ester reaches 71.5 percent. The preparation method has the advantages that the crystal structure of the main catalyst can be improved so as to be beneficial for carrying out the reaction; and the introduction of different auxiliary catalysts and quantities is helpful to improve the conversion ratio of the raw material and the product selectivity and is beneficial for improving the strength of the catalyst.

The present invention belongs to the field of resource utilization of building materials and solid waste, and relates to a red-mud-based cementing material based on efficient drying, component homogenization and activity improvement, and a preparation method therefor. The preparation method comprises: adding a filter aid to red mud to carry out sedimentation, then subjecting same to filter pressing until the water content is 14-16%, then drying the solid material, which has been subjected to filter pressing, until the water content is 4% or below, and finally grinding same to obtain the product. The filter aid comprises the following raw materials: 10-30 parts of polyaluminum chloride, 5-15 parts of polyaluminum sulfate, 1000-1200 parts of blast furnace slag or fly ash, 700-900 parts of steel slag, 400-600 parts of carbide slag or alkaline residues, and 300-400 parts of desulfurized gypsum or phosphogypsum or fluorgypsum. By means of the present invention, the dehydration efficiency of red mud can be improved, the red-mud-based cementing material can also be prepared in one step; the preparation process for the red-mud-based cementing material is simplified; and the prepared red-mud-based cementing material has the advantages of a high mechanical strength, high durability and erosion resistance.

The utility model belongs to the technical field of coal tar chemical industry, and particularly discloses a coal tar raw material layering dehydration device which comprises a raw material tank and a base, the lower end of the raw material tank is fixedly connected with the base, a feeding port is formed in the top of the raw material tank, and the outer side of the raw material tank is sleeved with a steam heat exchange sleeve. A water layer drain pipe is fixedly connected to the upper side of the raw material tank, an oil layer drain pipe is fixedly connected to the lower side of the raw material tank, a mixed drain pipe is fixedly connected between the water layer drain pipe and the oil layer drain pipe, the other end of the mixed drain pipe is fixedly connected with an electromagnetic three-way valve, and a liquid density sensor is fixedly connected to the inner wall of the raw material tank at the position of the mixed drain pipe. According to the utility model, the three liquid discharge pipes with different height positions are arranged, the liquid density sensor is arranged at the input end of the mixed liquid discharge pipe, and the controller is linked with the electromagnetic three-way valve at the output end of the mixed liquid discharge pipe, so that the automatic distinguishing and confirmation of an oil-water separation end point are realized, and the accuracy of oil-water separation is improved.

The partial or full dehydration of organic or inorganic matter containing water by induction of matter into a vacuum and processing matter through a specially designed acceleration channel is disclosed. The inducted matter accelerates in air from zero speed to sub-sonic speed to reach supersonic speed. As the material transitions the sound barrier, it is subject to acoustic shock waves and an instant negative pressure drop occurs. The sound waves disintegrate, disinfect the material and extract part or all moisture from any organic or inorganic material.

The invention belongs to the technical field of chemical production, and particularly relates to an efficient energy-saving refining system for producing cyclohexanone through dehydrogenation, which comprises an alcohol tower, a dehydrogenation heat exchanger, a dehydrogenation reactor, an alcohol tower feeding heat exchanger, a dehydrating tower, a light tower I, a light tower II, a ketone tower and an alcohol recovery tower which are connected in sequence, a middle feeding port of the alcohol tower is communicated with a tube pass discharging port of the alcohol tower feeding heat exchanger, a top discharging port of the alcohol tower is communicated with a tube pass feeding port of the dehydrogenation heat exchanger, a bottom discharging port of the alcohol tower is communicated with a middle feeding port of the alcohol recovery tower, and an alcohol ketone drying tower is additionally arranged between the alcohol tower feeding heat exchanger and the dehydration tower. A feed port of the alcohol ketone drying tower is communicated with a shell pass discharge port of the alcohol tower feed heat exchanger, and a liquid phase discharge port of the alcohol ketone drying tower is communicated with an upper feed port of the dehydrating tower. The alcohol tower adopts a process that raw materials directly enter the tower top, tower top reflux is cancelled, steam consumption is reduced, and the purpose of saving energy is achieved.

The invention relates to the technical field of washing machines, and discloses a double-drum full-automatic washing machine which comprises a machine shell, a cover plate is rotationally installed on the machine shell, water containing barrels with two water containing cavities are installed in the machine shell side by side, and each water containing barrel is fixedly connected with the machine shell through three springs. The springs are used for buffering vibration generated by the water containing buckets in the running process of the washing machine so as to keep the stability of the water containing buckets, a dewatering barrel is arranged in each water containing bucket, a gap exists between each dewatering barrel and the inner wall of the corresponding water containing bucket, and a washing motor is installed at the bottom of the outer side of each water containing bucket. And the washing motor and the dewatering cylinder are coaxially arranged. The two independent water buckets are arranged, and each bucket is provided with a completely independent water inlet and drainage system, so that classified washing of different types of clothes is realized, and cross contamination is effectively avoided. By means of the design, a healthier and more sanitary clothes washing environment is provided for a user.

The present disclosure relates to methods that enable the continuous formation of droplets and dehydration of droplets to provide pharmaceutically relevant particles that can be used for therapy. In particular, the methods disclosed herein allow the controlled continuous droplet formation and dehydration that produce circular particles having low internal void spaces comprising bioactive therapeutic biologies.

The invention belongs to the field of lake ecological desilting, and discloses a shallow lake bottom mud ecological desilting and residual water treatment combined treatment method which comprises lake bottom mud ecological desilting, solidification dehydration treatment and residual water treatment. Ecological dredging of the lake bottom mud is implemented by adopting an environment-friendly cutter suction dredger and a sealed pipeline to convey mud, and the bottom mud is conveyed to a mud discharge field to be solidified and dehydrated. A vacuum preloading technology is adopted for solidification and dehydration of the bottom mud, pore water of the bottom mud is effectively discharged by increasing the pressure difference between soil bodies of a drainage plate, and the overall solidification effect is improved. The residual water treatment comprises the treatment of desilting and solidifying residual water, the technologies of multi-stage precipitation, mechanical aeration, aquatic plant remediation and the like are adopted, and the residual water is discharged nearby after being treated to reach the standard. The combined treatment method aims at effectively reducing endogenous pollution of lakes, promoting lake water quality improvement and guaranteeing water safety of regional lakes and reservoirs, and is particularly suitable for ecological dredging engineering of shallow lakes, short construction period and fine-particle bottom mud.

The invention discloses a rapid tubular induced crystallization reaction process and device for fluorine-containing wastewater, the device comprises a tubular reactor, a crystal sedimentation tank and crystal dehydration equipment, the fluorine-containing wastewater is pumped from a water inlet at one end of the tubular reactor, calcium liquid is pumped from dosing ports at intervals on the tubular reactor along the flowing direction of the wastewater at a set flow rate, and the calcium liquid is pumped from the dosing ports at intervals along the flowing direction of the wastewater; the fluorine-containing wastewater reacts with a calcium agent in the tubular reactor to generate calcium fluoride crystals with the particle size range of 10-80 microns, a mixture is discharged into a crystal sedimentation tank through a water outlet in the other end of the tubular reactor, clear water is discharged from a water outlet in the upper portion of the crystal sedimentation tank, and crystal slurry sinking to the bottom of the crystal sedimentation tank is pumped into a cyclone separator through a crystal discharging pump; large-particle crystals discharged from an outlet in the lower end of the cyclone separator are collected by a crystal collection pool and are regularly discharged into crystal dehydration equipment for dehydration, small-particle crystals discharged from an outlet in the upper end of the cyclone separator flow back to the water inlet end of the tubular reactor, the reactor is small in size and low in investment, and the stability of the calcium fluoride crystal product quality is guaranteed.

The invention relates to the technical field of oral liquid bottle cleaning and sterilizing, in particular to an oral liquid filling bottle body cleaning and sterilizing device. Comprising a case, an inner frame is arranged in the case, a motor, an inner gear ring and an outer gear ring are fixedly mounted on the inner frame, an intermittent shaft and a revolution shaft are rotatably mounted on the inner frame, two transmission interruption areas are arranged on the inner frame and correspond to the position between the inner gear ring and the outer gear ring, and a transmission wheel is mounted at the output shaft end of the motor; three fan-shaped tooth sections and three tooth-free arc sections are alternately arranged on the transmission wheel, the central angles of the three fan-shaped tooth sections are gradually increased by 30 degrees in the clockwise direction, and a driven gear meshed and matched with the fan-shaped tooth sections is mounted on the intermittent shaft. The device has the beneficial effects that through precise linkage of the motor, the transmission wheel, the variable-speed shaft, the inner gear ring and the outer gear ring, a stepped dehydration system is constructed, and the problem that stubborn water stains of traditional oral liquid bottle cleaning and sterilizing equipment are difficult to peel off is solved.

The utility model relates to a heating system for dehydrating and sintering a loose body, and the heating system comprises an isolation cylinder which is internally provided with a high-temperature heating area and is provided with a gas inlet, and the gas inlet is used for providing reaction gas for the high-temperature heating area; the rod feeding device is movably arranged in the axis direction of the isolation barrel and is used for moving the loose body to a high-temperature heating area in the isolation barrel; the first heater is arranged on the outer side of the isolation barrel and used for heating the isolation barrel to form a high-temperature heating area; and the second heater is arranged on the rod feeding device and faces one end of the loose body, and the second heater is used for heating the loose body. According to the technical scheme provided by the invention, the difference of geometric dimensions and optical characteristics of each part of the loose body after the dehydration and sintering process of the loose body can be reduced, and the quality of the optical fiber preform is improved.

The invention relates to the technical field of preparation of building materials, and discloses an ultra-high performance polycarboxylate superplasticizer for UHPC (Ultra High Performance Concrete). The superplasticizer composition comprises the following components in parts by weight: 20-30 parts of ethyl acrylate; 20 to 30 parts of sodium acrylate; the invention also provides a preparation method of the ultra-high performance polycarboxylate superplasticizer for UHPC, and the preparation method comprises the following steps: S1, raw material preparation: dissolving ethyl acrylate, sodium acrylate, sodium allylsulfonate, hexadecyl acrylate and diene peroxide in 50-100 parts of water to form a uniform solution; and S2, mixing and pre-polymerizing. By introducing nano silicon dioxide, an ultrasonic dispersion technology and a low-temperature vacuum dehydration technology, the dispersity and anti-permeability of the water reducing agent and the fluidity of concrete are improved, meanwhile, high strength is kept, and the problems that concrete is uneven in performance and poor in constructability are solved.

The invention relates to the technical field of preparation of manganous-manganic oxide, in particular to a production and preparation process of a manganous-manganic oxide material for batteries, which comprises the following steps: dissolving high-purity manganese sulfate to prepare a manganese sulfate solution, and adding a dispersing agent and a surfactant to obtain a manganese salt solution; the method comprises the following steps: adding a base solution into a reaction kettle, stirring and heating, conveying a manganese salt solution and ammonia water, synchronously introducing oxygen, dividing the whole oxidation reaction process into two stages, controlling the flow velocity of the ammonia water in different stages, and dynamically adjusting the temperature; and carrying out suspension precipitation on manganous-manganic oxide obtained by the oxidation reaction, aging, and carrying out dehydration suction filtration, washing and drying to obtain the manganous-manganic oxide material for the battery. The invention aims to adjust the morphology of the manganous-manganic oxide finished product by controlling reaction conditions, effectively reduce the granularity of the product and enhance the uniformity of particle size distribution.

The utility model relates to a spatial multilayer ultrahigh pressure belt type dehydration system which comprises a main rack, a material distributing and feeding device, a material distributing device, a filter belt, a filter belt traction machine, a filter pressing hydraulic machine, a hydraulic station and a controller, the material distributing and feeding device, the material distributing device, the filter belt traction machine and the filter pressing hydraulic machine are connected and mounted on the main rack; and the output end of the material distributing and feeding device is connected and mounted above the material distributing device. The dehydration method comprises the steps of equipment starting, material distribution, filter pressing dehydration and unloading. The organic waste dehydration device is higher in dehydration efficiency and lower in cost, and can be used as an organic waste dehydration device capable of reducing pollution and carbon.

The present disclosure relates to methods that enable the continuous formation of droplets and dehydration of droplets to provide pharmaceutically relevant particles that can be used for therapy. In particular, the methods disclosed herein allow the controlled continuous droplet formation and dehydration that produce circular particles having low internal void spaces comprising bioactive therapeutic biologics.

The invention relates to the field of medical materials and medical instruments, and discloses a dry bioprosthetic valve and a preparation method thereof.The preparation method comprises the following steps that S1, pericardium and a cross-linking agent solution are mixed for a cross-linking reaction; s2, carrying out first dehydration treatment on the crosslinked pericardium by adopting a first dehydration solution with gradually increased concentration gradient under an ultrasonic condition; and S3, carrying out second dehydration treatment on the pericardium subjected to the first dehydration treatment by adopting a second dehydration solvent, so as to obtain the dried bioprosthetic valve. According to the preparation method provided by the invention, ethanol, isopropanol and water in a specific proportion are adopted to prepare a dehydration solution with gradient concentration, and two-step dehydration drying is carried out in combination with the physical effect of an ultrasonic technology and glycerol, so that rapid rehydration of the bioprosthetic valve is realized, and the original shape and mechanical property of the bioprosthetic valve can be better recovered after rehydration; and the immediate hemodynamic stability of the valve is improved.

The invention relates to high-water-content ABS powder extrusion dehydration equipment, and aims to solve the problem that in the prior art, the high-water-content ABS powder is dehydrated until the water content is 18 wt% or below, and meanwhile plasticizing is avoided, the high-water-content ABS powder extrusion dehydration equipment comprises an extrusion mechanism used for carrying out extrusion dehydration on the high-water-content ABS powder; the drainage mechanism is used for receiving water discharged by the extrusion mechanism and discharging the water out of the extrusion dehydration equipment; the feeding mechanism is used for feeding ABS powder with high water content into the extruding mechanism; wherein the extruding mechanism comprises a conveying section, an extruding section, a crushing section and a dispersing section; the drainage mechanism is connected with the extrusion section; and the feeding mechanism is connected with the conveying section. By means of the equipment, the water content of the ABS wet powder can be reduced to 18 wt% or below from 50 wt% or below, the dehydrated ABS wet powder is still kept in powder and cannot be plasticized, and the follow-up blending and dispersing processes are facilitated.

The utility model provides a sludge deep dehydration filter press convenient for replacing a filter plate, which belongs to the technical field of filter presses and comprises a rack, a filter pressing component and a material taking component, a mounting plate is fixedly mounted at one end of the rack, and a thrust plate is mounted at the tail end of the rack; when the filter plate is dismounted, the mounting seat is controlled to slide on the surface of the transverse plate at the top of the supporting leg, the mounting seat slides to drive the electric push rod mounted on the surface to move, and the top block mounted at the telescopic end of the electric push rod corresponds to the sliding blocks mounted on the two sides of the filter plate frame; the top block drives the slide block to rise from the slide rail, so that the filter plate frame is taken out from the slide rail, and the filter plate in the filter plate frame is convenient to replace and clean.

The invention discloses pond bottom sludge separation treatment equipment based on aquaculture, and relates to the technical field of aquaculture, the pond bottom sludge separation treatment equipment comprises a supporting mechanism, and is characterized in that two longitudinally-arranged support assemblies are fixedly connected to the top end face of the supporting mechanism in a linear array mode, and a supporting frame is rotationally connected to the inner sides of the support assemblies; the side plate assemblies are fixedly connected to the inner sides of the supporting frames, efficient separation of water in sludge is achieved through the extrusion effect of the spiral assemblies and the filtering function of the seepage mechanisms, the water content of the separated sludge is remarkably reduced, and compared with traditional equipment only pumping silt, the difficulty and cost of follow-up dehydration, stacking or resource utilization are greatly reduced; meanwhile, the risk of secondary pollution caused by sewage discharge is reduced.

The invention discloses a sludge treatment method and system, and relates to the field of solid waste treatment, and the method specifically comprises the following operation steps: S1, multi-frequency resonance pretreatment: destroying a sludge colloid structure through stepped mechanical vibration: collapsing an extracellular polymer network at a low frequency, breaking down microbial cell walls at an intermediate frequency to release intracellular water, pathogenic bacteria are inactivated through a high-frequency cavitation effect; s2, performing electrochemical in-situ flocculation; s3, gradient pressure dehydration; s4, low-temperature mineralization stabilization; and S5, vacuum condensation and recovery. According to the sludge treatment method and system, through stepped low-frequency, medium-frequency and high-frequency mechanical resonance, the colloid structure of the sludge can be directionally damaged, the fluidity of the sludge is remarkably improved, chemical conditioners are remarkably reduced, agent residues and secondary pollution are avoided, pathogens are physically inactivated through the high-frequency cavitation effect, and the treatment effect of the sludge is improved. Micro-nano oxygen bubbles are synchronously generated to strengthen free radical oxidation, and a sterile environment is created for subsequent mineralization.

The invention discloses a gradient frame membrane and separation application thereof. An integrated gradient membrane material is constructed in a mode of functional group sharing, metal node sharing or skeleton interpenetration, and target molecule recognition sites are designed by utilizing the advantage that a framework material is easy to modify, so that the separation performance is remarkably improved. The gradient film structure comprises a metal organic-metal organic framework gradient film, a metal organic-covalent organic framework gradient film and a covalent organic-metal organic framework gradient film. The invention introduces a new structure of a metal organic framework-covalent organic framework gradient film and a construction strategy thereof in detail. The preparation method comprises the steps of preparing a bottom layer film structure from bottom to top, then preparing a top layer film structure on the bottom layer film structure, performing post-modification and the like. By designing a specific asymmetric porous structure and adsorption sites, the membrane shows excellent ethylene / ethane, propylene / propane, ion screening and organic matter dehydration separation performance under the dual action of adsorption selection and shape-selective screening.

The invention provides a method for recovering Si, C and TiO2 based on chlorinated waste salt water quenching slag, which comprises the following steps: sequentially carrying out water quenching dissolution, precipitation separation and filter pressing dehydration treatment on chlorinated waste salt to obtain water quenching slag and supernate; adding a dilute acid solution into the water-quenched slag, dissolving, and adding a reducing agent for reaction to obtain slurry; carrying out solid-liquid separation on the slurry to obtain a solid material and filtrate; the filtrate is pumped into a boiling bed separator, the petroleum coke and TiO2 are intercepted by a medium material layer, clear liquid is discharged, then the medium material layer is subjected to backwashing regeneration, and the desorbed petroleum coke and TiO2 are subjected to graded enrichment by a hydrocyclone, so that petroleum coke slurry and TiO2 slurry are obtained. According to the method, TiO2, C and other resources in the water-quenched slag obtained after molten salt chlorination waste salt water quenching are recycled, and the technical problem that in the existing chlorination waste salt resourceful treatment process, Si, C, TiO2 and other resources in the water-quenched slag are wasted is solved.

The invention relates to the technical field of multi-drum washing machines, in particular to a dehydration control method of a multi-drum washing machine and the multi-drum washing machine, and aims to solve the problem that when two or more washing drums of an existing multi-drum washing machine enter a dehydration procedure, dehydration requirements conflict exists between the two or more washing drums. In order to achieve the purpose, the dewatering control method comprises the steps that whether a plurality of washing drums are small drums or not is judged; when the plurality of washing drums are all small drums, the plurality of washing drums are controlled to independently execute dehydration operation; and when at least one of the plurality of washing drums is a large drum, controlling one or a group of washing drums to perform dehydration operation, and stopping the other washing drums or rotating at a low speed or rotating reversely. According to the invention, the dewatering sequence under the condition that the dewatering stages of the plurality of washing drums are overlapped is limited, so that the resonance of the whole machine caused by mutual dewatering conflicts can be avoided, the washing effect is ensured, and the washing efficiency can be improved.

To provide a method for preparing a flavor composition dehydrated and de-alcoholized from a strong alcoholic flavor composition, flavor compositions obtainable by the method, and flavored consumer products comprising the compositions.SOLUTION: There is provided a method for preparing a flavor composition by decreasing or removing water and ethanol from a strong alcoholic flavor composition, the method comprising the steps of treating the strong alcoholic flavor composition by a dehydration process and a dealcoholization process.SELECTED DRAWING: None

The present invention provides a household electrical appliance comprising: a washing tank; a water storage device connected to the washing tank via a dehydration path for temporarily storing washing water; and a suction unit connected to the water storage device via an exhaust path for sucking washing water in the washing tank into the water storage device. The water storage device comprises: a water inlet opening into the water storage device, through which washing water in the washing tank can be introduced into the water storage device from the water inlet via the dehydration path; an exhaust port opening into the water storage device, the suction unit connected to the exhaust port via the exhaust path; and a drain port opening into the water storage device for draining washing water in the water storage device. A defoaming unit is provided in the water storage device near the exhaust port, the defoaming unit being configured to eliminate foam and prevent it from entering the exhaust port. Thus, a household electrical appliance can be provided that reliably prevents foam from entering the suction unit.

The invention provides a method for preparing high-purity hafnium tetrachloride by wet extraction and separation, which comprises the following steps: stirring and leaching hafnium alloy waste serving as a raw material by using HNO3 and HF mixed acid, then adding thioacetamide, adjusting the pH value to 4-5, stirring and filtering; compounding tributyl phosphate, trioctylphosphine oxide and sulfonated kerosene to obtain a composite extracting agent, and stirring and mixing to form a homogeneous organic phase; in a hydrochloric acid medium, controlling the volume ratio of an organic phase to a water phase to be (2.5-3.5): 1, carrying out three-stage counter-current extraction, and standing for phase splitting; the extracted organic phase passes through an adsorption column filled with iminodiacetic acid modified silica gel; and carrying out reverse extraction by using a hydrochloric acid solution, and then carrying out reduced pressure evaporation concentration, cooling crystallization and dehydration to obtain hafnium tetrachloride. According to the method, the zirconium and hafnium separation efficiency in the hafnium tetrachloride preparation process is improved, and the problem that the content of zirconium and hafnium impurities in the product is too high is solved.

The invention discloses an anti-corrosion composite furnace lining material for zircon sand fluidizing chlorination and a preparation method thereof.The anti-corrosion composite furnace lining material comprises a base body layer and an anti-chlorine-seepage protection layer, and the preparation method comprises the steps of base body layer preparation, coating liquid preparation, base body layer surface coating, coating curing, high-temperature firing, chlorine seepage treatment and annealing. According to the method, the specially-made coating liquid is adopted for enhancing the surface of the high-purity corundum furnace lining for the first time, the permeability of the coating liquid to a base body layer is improved by means of matched dissolution-sedimentation of chromium chloride and phosphoric acid, pores are blocked by means of expansion caused by dehydration and oxidation of CrCl3. 6H2O, densification of surface layer Cr2O3, spinel and phosphate and surface layer pore blocking are achieved, the porosity is greatly reduced, and the porosity of the high-purity corundum furnace lining is improved. The chlorine permeability is reduced, and the core problems of high permeability and short service life of the material in a high-temperature chlorine corrosion environment are solved; according to the invention, a chlorination-annealing self-cleaning process is matched to realize deep removal of impurities, so that the product purity of the chlorination process is improved, and the purification cost is reduced.

The invention relates to a gas nanometer purification method and a purifier, and the method comprises the following steps: gas to be cleaned enters a gas-water separator for gas-liquid separation and coarse filtration, liquid impurities and large-particle solid impurities in the gas are removed, and preliminarily purified gas is obtained; on the basis of switching logic, the preliminarily purified gas is alternately conveyed to two adsorption unit groups for deep adsorption purification, adsorbent dehydration treatment and fine dust interception treatment are sequentially completed in the adsorption units, and clean gas is obtained; one part of the clean gas is conveyed to the gas storage bin to be stored, and the other part of the clean gas is conveyed to the regeneration gas bin to be pre-stored for regeneration cycle of the subsequent adsorption unit. Through the integrated method design of continuous adsorption working conditions, online regeneration cycle and automatic pressure equalizing switching, seamless connection of adsorption and regeneration and uninterrupted gas supply in the whole process are achieved, gas supply interruption and severe gas pressure fluctuation are effectively avoided, and the strict use requirements of precise manufacturing, automatic production lines and continuous production scenes for stable gas sources can be met.

The invention provides a ventilation device for construction in a tunnel. The ventilation device comprises an air supply barrel, an air inlet barrel is rotationally arranged in one end of the air supply barrel, an air inlet valve is arranged at the end, away from the air supply barrel, of the air inlet barrel, the outer side of the air supply barrel is sleeved with a dehumidification box, and the air inlet barrel can be communicated with or disconnected from the dehumidification box; air inlet windows are arranged on the two sides of the dehumidification box. An evaporation assembly and a condenser are sequentially arranged in the dehumidification box and correspond to the air inlet windows. The evaporation assembly is provided with a supporting frame corresponding to the air inlet window, and dehumidification plates are evenly arranged in the supporting frame. A water removal mechanism for removing condensate water on the side surface of the dehumidification plate is arranged on the outer side of the dehumidification plate in a sliding manner; according to the ventilation device for construction in the tunnel, connection or disconnection of the air inlet barrel and the interior of the dehumidification box can be switched according to needs, so that the ventilation device has two ventilation modes of direct air supply and dehumidification air supply, the ventilation requirements under different external air conditions in non-tunnel construction are met, and the humidity in the tunnel is reduced.