28results about How to "Efficient regeneration" patented technology

The invention discloses a pressure swing adsorption device of a hydrogen production system. The pressure swing adsorption device comprises a first adsorption tower, a second adsorption tower, a waste gas emission unit, a hydrogen input pipe, a hydrogen output pipe, a program control valve group and a PLC (Programmable Logic Controller) control system, according to the device, a plurality of adsorption layers are respectively arranged in the first adsorption tower and the second adsorption tower, and the pressure change of each adsorption tower in different adsorption and regeneration stages is controlled, so that the intelligent control of the pressure swing adsorption hydrogen production process is realized, and the first adsorption tower and the second adsorption tower alternately perform adsorption and regeneration; compared with the traditional two independent steps of deoxidation and drying, the method has the advantages that the influence on the purification effect of hydrogen due to flow connection is avoided, the hydrogen purification flow is efficiently integrated, and the purification effect and efficiency of hydrogen are improved; by controlling the opening and closing time and sequence of the program control valve group, when one adsorption tower performs adsorption operation, the other adsorption tower performs regeneration operation, so that the overall efficiency and yield of the system are improved.

The present invention discloses a novel membraneless electrodeionization device structure. It comprises a composite top cover, a composite bottom cover, a cylindrical shell and an ion exchange resin layer. The upper end of the cylindrical shell is provided with a composite top cover, and the lower end is provided with a composite bottom cover. The composite top cover and the composite bottom cover have the same structure and are symmetrically arranged at the middle and two ends of the cylindrical shell. The cylindrical shell is filled with an ion exchange resin layer. The composite top cover and the composite bottom cover are pressed toward the middle of the cylindrical shell at both ends of the cylindrical shell, thereby pressing the ion exchange resin layer. The composite top cover / bottom cover both comprise an upper interface, an upper cable sealing joint, a top cover plate, an upper electrode connecting rod, an upper porous pressing plate, an upper resin filter plate and an upper electrode net. In the present invention, the resin layer can be evenly pressed under the action of the composite top cover and the composite bottom cover, and the upper and lower resin particles are always kept in close contact, which effectively reduces the unfavorable water flow distribution condition of the resin layer, effectively ensures good regeneration of the resin, simplifies the structure, and is easy to install and maintain.

The invention provides a desulfurization ash regeneration device and method, and relates to the technical field of desulfurization ash regeneration. The device comprises a shell, the shell is provided with a reaction cavity, a feeding port and a discharging port, and a turnover sand core is arranged between the reaction cavity and the discharging port and used for controlling the desulfurization ash discharging process; a gas inlet is formed between the discharge hole and the sand core and is used for introducing reaction gas which reacts with the desulfurized fly ash into the reaction cavity; an ignition device; the circular reaction unit is used for realizing circular reaction of the desulfurized fly ash in the reaction cavity to reach set conditions; and an air outlet. When the device is used for regenerating the desulfurized fly ash, reaction gas can be used as a heat source and a reducing atmosphere at the same time, the desulfurized fly ash is efficiently and quickly regenerated and decomposed into calcium oxide in the reaction cavity, and the energy consumption is reduced; the regenerated desulfurized fly ash can be used in a sintering or pellet production process, so that the treatment cost of waste ash and the use amount of new lime are reduced, and the environmental protection cost and carbon emission of enterprises are effectively reduced.

The application discloses a temperature-controllable desalination amphoteric group MOF material and a preparation method and application thereof, and belongs to the field of nanometer functional material water treatment. The application takes zirconium-based MOF (MOF-808 / UiO-66) with formic acid molecules as a substrate, introduces an amphoteric compound containing carboxyl and amino groups through a formic acid ligand exchange method in one step, and obtains the amphoteric group MOF material, wherein the molar ratio of the carboxyl and the amino group is (1-2):1. At normal temperature, the carboxyl and the amino group of the material synchronously adsorb cations and anions in water through electrostatic interaction, so that desalination of a salt-containing water body is realized; after adsorption saturation, only hot water immersion at 50-80 DEG C is needed, so that ion desorption and material green regeneration are realized through temperature-induced proton transfer. The material has high desalination efficiency, the removal rate of Na+ is up to 99%, the removal rate of Cl- is up to 95%, the regeneration rate is up to 99%, the preparation process is simple, the conditions are mild, there is no secondary pollution, and the application is suitable for desalination treatment of a low-concentration salt-containing water body. + ‑ The removal rate of Na+ is up to 99%, the removal rate of Cl- is up to 95%, the regeneration rate is up to 99%, the preparation process is simple, the conditions are mild, there is no secondary pollution, and the application is suitable for desalination treatment of a low-concentration salt-containing water body.​

The present invention discloses a dual-condensation variable frequency adaptive dehumidifier, which relates to the technical field of dehumidifiers. The present invention includes a machine body, and also includes: a variable frequency control unit, which is used to perform variable frequency control on the operation of the machine body, and the variable frequency control unit includes a humidity sensor and a controller fixedly installed on the machine body; a dehumidification unit, which is used to perform dehumidification treatment, and the dehumidification unit includes a sealing plate fixedly installed in the machine body, and a fixed ring is installed in the sealing plate for sealing and rotation, and a dehumidification wheel is fixedly installed on the inner wall of the fixed ring. The advantage is that the present invention can automatically switch the regeneration mode by using the speed change of the dehumidification wheel, and at the same time adjust the size of the dehumidification area and the regeneration area, so that the dehumidification wheel has a faster regeneration speed and a larger dehumidification area when rotating at a high speed, thereby ensuring that it can perform long-term and effective rapid dehumidification treatment in a high humidity environment.

The present invention provides an aminohydantoin Schiff base 4-pyridine quaternary ammonium salt precursor compound and its preparation method and application, which belongs to the synthesis and application technical field of quaternary ammonium salt Schiff base halamine high-efficiency composite antibacterial agent. Aminohydantoin hydrochloride, 4-pyridine formaldehyde and propylene bromide are used as raw materials to prepare an aminohydantoin Schiff base 4-pyridine quaternary ammonium salt precursor compound. And, the application process of the precursor compound is to pretreat the fiber or fabric with 3-mercaptopropyltriethoxysilane, then arrange it with the precursor compound, and finally halogenate it to obtain an antibacterial material. The method of the present invention has mild reaction conditions, simple process and good antibacterial effect. The 1-ADPAH-R antibacterial agent synthesized by the method and its halamine precursor combine the advantages of multiple antibacterial structures, so that the antibacterial agent has water solubility, is easy to operate when preparing the antibacterial material, and can prepare an antibacterial material with excellent antibacterial properties.

The invention discloses a method for efficiently leaching platinum group metal in a waste automobile catalyst, and belongs to the field of rare and precious metal smelting. The method comprises the following steps: a leaching process: mixing the hulled waste automobile catalyst with a leaching agent, carrying out acid leaching in an acidic solution for a period of time, adding a complexing agent to complex platinum group metals, leaching for a period of time, and filtering to obtain a pregnant solution rich in the platinum group metals and carrier residues; wherein the leaching agent is a cerium-containing compound; a resin adsorption process: adsorbing the pregnant solution through an adsorption column filled with adsorption resin to obtain an adsorbed solution; and an elution process: washing the adsorbed adsorption resin with water and eluting the platinum group metal step by step, and regenerating the eluted adsorption resin for cyclic utilization. The method aims at avoiding generation of toxic and harmful substances (chlorine and NOx) and use of highly toxic cyanide in an existing wet process, environmental pollution and potential safety hazards are fundamentally eliminated, and meanwhile the leaching efficiency of the platinum group metal is remarkably improved.

This invention provides an adsorption device for hydrogen peroxide oxidation tail gas, comprising an adsorption tank, an inner filter cartridge, an outer filter cartridge, an adsorption chamber, several air inlets, an adsorption resin layer, an inlet pipe, and an outlet pipe; both the inner and outer filter cartridges are located inside the adsorption tank. This invention optimizes the traditional "flat-lay" structure into a "sleeve-type" coaxial double-layer filter cartridge structure, improving the contact efficiency between the tail gas and the resin, preventing the resin from being blown away or worn, extending its service life, and simplifying the filling process. The elimination of quartz sand filler also simplifies the filling process. The system adopts a "five-in-one-out" operating mode, enabling multiple adsorption tanks to operate in rotation. Combined with steam regeneration, nitrogen purging, and spray cooling processes, it achieves efficient resin regeneration and reuse, significantly reducing operating energy consumption and material replacement frequency. The adsorption system operates stably, has a compact structure, and can continuously and efficiently remove aromatic organic pollutants from the oxidation tail gas, balancing operational economy and environmental friendliness.

The invention discloses a direct high-temperature regeneration method of a waste lithium iron phosphate positive plate in a water vapor atmosphere. The method comprises the following steps: directly placing the positive plate obtained by discharging and disassembling the waste lithium iron phosphate battery into a reaction container, directly regenerating at 600-650 DEG C by taking superheated steam as a gasification medium, and removing aluminum foil after the regeneration process is completed, thereby obtaining the regenerated lithium iron phosphate positive plate. According to the method provided by the invention, the structure of lithium iron phosphate can be completely repaired at a relatively low temperature, and aluminum foil fusion is avoided. Compared with a traditional recycling process, the method has the advantages that complex pretreatment steps such as smashing, screening and stripping are omitted, material loss is reduced, the whole process is mild and environmentally friendly, and the method is short in process and easy and convenient to operate.

The catalyst regeneration reactor comprises a crushing unit, a feeding conveying belt, a drying unit and a reactor, the crushing unit comprises a crushing box and two crushing rollers, the drying unit comprises a drying box, the bottom of the drying box is communicated with the reactor through a discharging port, and the feeding conveying belt is used for conveying a catalyst discharged from a feeding port to a feeding port; the drying box is provided with a mixing assembly, the mixing assembly is used for stirring a catalyst in the drying box, the drying box is communicated with a drying pipe, and the drying pipe is used for blowing high-temperature dry air to dry the catalyst in the drying box; according to the catalyst regeneration reactor disclosed by the utility model, the crushing unit is adopted to crush a to-be-regenerated catalyst and ensure that the catalyst can be quickly and effectively regenerated, and the drying unit is matched to dry the to-be-regenerated catalyst, remove moisture adsorbed in the catalyst and preheat the catalyst, so that the regeneration time is greatly shortened, and the regeneration efficiency is improved. The regeneration efficiency and the regeneration quality are improved.

The invention relates to an Ag (I)-based silicon dioxide adsorbent as well as a preparation method, a regeneration method and application thereof, and relates to the field of adsorbents. The preparation method of the Ag (I)-based silicon dioxide adsorbent comprises the following steps: adding a silicon dioxide carrier into a silver nitrate solution, stirring, filtering, washing, and carrying out vacuum drying to obtain the Ag (I)-based silicon dioxide adsorbent, wherein the mass volume ratio of the silicon dioxide carrier to the silver nitrate solution is 1g: (15-40) mL; the concentration of the silver nitrate solution is 0.05-0.5 mol / L. Adsorption active sites of the Ag (I)-based silicon dioxide adsorbent prepared through the convenient and efficient method are greatly increased, and the Ag (I)-based silicon dioxide adsorbent has good adsorption performance. Besides, the Ag (I)-based silicon dioxide adsorbent saturated in adsorption is placed in a proper microwave environment for regeneration, energy consumption is low, effective regeneration of the adsorbent can be conveniently and efficiently achieved, resource waste of the adsorbent is avoided, and secondary pollution is reduced.

The present application relates to adsorption separation of bisphenol A and 2,4-bisphenol A adsorbent and its adsorption separation process; the adsorbent is a high-silicon Y molecular sieve containing rare earth, the molar ratio of the contained silicon oxide and aluminum oxide is 2.5:1-15:1, the contained rare earth metal is one or a combination of multiple of lanthanum, cerium, scandium and yttrium, the content of rare earth metal is 10:1-1000:1 in terms of the molar ratio of silicon and rare earth metal, and the rare earth metal exists in the form of metal ions. The adsorption separation process is to contact the mixture containing bisphenol A, 2,4-bisphenol A, triphenol and chroman in the crystallization mother liquor with the adsorbent in the adsorption separation reactor to carry out adsorption separation, and the obtained bisphenol A and 2,4-bisphenol A after adsorption separation enter the isomerization reaction unit; the obtained triphenol and chroman after adsorption separation enter the cracking reaction unit. Phenol is used as the eluent, has strong affinity with the adsorbent, and the elution efficiency reaches more than 95%.

The present application belongs to the field of biotechnology and tissue culture, and particularly relates to a method for inducing bulbil-like body of Allium fistulosum and a method for genetic transformation mediated by bulbil-like body. The method comprises the following steps: firstly, culturing sterile seedlings of Allium fistulosum; then, inducing bulbil-like body of the Allium fistulosum explant to generate RTB by using root-like body induction medium RsIM under dark conditions; subsequently, inducing the RTB of the Allium fistulosum to generate RTB by using bulbil-like body RTB induction medium RTBsIM under light conditions; then, inducing the RTB embryo to germinate to form regenerated seedlings by using RTB embryo germination medium RTBsGM; finally, inducing the regenerated seedlings to root by using rooting medium RM, and then developing into complete seedlings. The present application can efficiently induce the Allium fistulosum to generate RTB, and the established regeneration system of the Allium fistulosum RTB has the advantages of high efficiency and stability.

The present invention relates to the technical field of polymer materials, and specifically discloses a water treatment material for electrically enhanced adsorption filtration and a preparation method and application thereof. The present invention comprises the following steps: (1) ultrasonically cleaning the melamine sponge, drying it, placing it in a tube furnace, introducing a protective gas, and setting the heating rate to 4 to 6°C / min ‑1 , after preheating, continue to heat up to 900-1100°C, keep warm, cool to room temperature, and obtain ultra-light flexible carbon sponge; (2) dissolve tris(hydroxymethyl)aminomethane in a solvent to obtain a solution, adjust the pH to 8.4-8.6, then add dopamine and polyethyleneimine, mix, add ultra-light flexible carbon sponge, stir and react for 10-14h, and obtain a water treatment material for electrically enhanced adsorption and filtration. The present invention uses N-rich melamine sponge as a precursor, which has a larger specific surface area; the sponge has good conductivity after high-temperature carbonization of inert gas; dopamine and polyethyleneimine are modified to improve their adsorption potential.

The present application relates to a kind of metal hydride hydrolysis hydrogen and hydrolysis product in-situ regeneration device and method, belong to hydrogen energy storage and release technical field.The device includes dynamic hydrogen nanobubble generation unit, reaction chamber, two-way flowable filter device, liquid storage tank connected in sequence;The top of the reaction chamber is provided with hydrogen inlet and outlet, solid inlet and outlet and pressure relief port, and the bottom is provided with liquid inlet and outlet;The dynamic hydrogen nanobubble generation unit is connected with the hydrogen inlet and outlet of reaction chamber by gas path;The dynamic hydrogen nanobubble generation unit includes gas compression circulation system and parameter monitoring feedback unit.The present application is integrated by hydrolysis hydrogen-hydride regeneration process unit, and utilizes dynamic hydrogen nanobubble method, for the first time in aqueous system realizes the efficient, low-temperature in-situ regeneration of metal hydride hydrolysis product (metal hydroxide), forms complete reversible hydrogen storage and release cycle.The method has the advantages of low energy consumption, good cycle stability, high device integration.

The invention relates to the technical field of biology, and particularly discloses a method for inversely differentiating human scalp fibroblasts into dermal papilla-like cells and application of the method. Ribociclib hydrochloride and vitamin D2 are added for combined induction, so that the human scalp fibroblasts are directly converted into the dermal papilla-like cells; the dermal papilla-like cells have high biomolecular expression similarity with primary human dermal papilla cells, and the problems that proliferation of the dermal papilla-like cells is limited and the hair induction potential of the dermal papilla-like cells is gradually reduced within a long time are solved.

The present application relates to the technical field of breeding and seedling raising of forest trees, and discloses a method for realizing in vitro regeneration of Rosa roxburghii by hypocotyl culture, which comprises the following steps: taking seedling germinated from cold storage of Rosa roxburghii seeds as material, removing cotyledon and root, cutting hypocotyl segments with a length of 0.6-1.5 cm as explants, and sterilizing the explants; inoculating the sterilized explants into primary induction medium, and carrying out dark culture until callus is generated and primary adventitious buds are induced; inoculating the cultured callus into differentiation medium, and carrying out dark culture until secondary adventitious buds are regenerated; inoculating the obtained secondary adventitious buds with a height of 1.5-2.5 cm into rooting medium until rooted plants are obtained; and hardening the obtained rooted plants, and then transplanting them into mixed substrate for culture.

The invention belongs to the technical field of environmental engineering, and particularly relates to a contaminated soil micro-foam leaching device and method based on the ATP forming principle, a supporting table is fixedly provided with a large crossed roller bearing, the large crossed roller bearing is provided with three high-frequency vibration tables, the three high-frequency vibration tables are each provided with a reaction tank, and the reaction tanks are arranged on the supporting table; the three reaction tanks are sequentially arranged in a clockwise mode to be a filling station, a leaching station and a discharging station, a discharging component is arranged on the filling station, a micro-foam generating module is arranged on one side of the leaching station and arranged on a supporting table, an anti-leakage collecting barrel is arranged below the discharging station, and a discharging component is arranged on the discharging station. The technical scheme is innovated from the aspect of mass transfer principle, continuous physical conveying of soil can be achieved, targeted transfer of pollutants from the soil to a leaching medium can be actively driven through an ATP bionic mechanism, and three core challenges of mass transfer efficiency, operation cost and secondary pollution are systematically solved.

The invention discloses a method for regenerating positive electrode materials of waste lithium-ion batteries, which comprises the following steps: discharging and disassembling waste lithium-ion batteries to obtain positive electrode sheets and negative electrode materials of waste lithium-ion batteries, pre-treating the positive electrode sheets of waste lithium-ion batteries to obtain positive electrode material powder of waste lithium-ion batteries; mixing the negative electrode materials of waste lithium-ion batteries with NaCl solution and a promoter to obtain a first solution and performing a hydrothermal reaction, evaporating and crystallizing to obtain LiCl powder; mixing the LiCl powder with an organic solvent and an activator to perform a saponification reaction to obtain a second solution; mixing the second solution with the positive electrode material powder of waste lithium-ion batteries to obtain a third solution; drying the third solution to obtain positive electrode material powder; and quenching the positive electrode material powder to obtain a regenerated positive electrode material of lithium-ion batteries. The method of the invention can efficiently regenerate the positive electrode materials of waste lithium-ion batteries and restore their excellent electrochemical properties.

The application belongs to the technical field of environmental engineering, and particularly relates to a device and method for leaching of contaminated soil micro-foam based on ATP formation principle. A large cross-roller bearing is fixedly installed on a support table. Three high-frequency vibration tables are arranged on the large cross-roller bearing. Reaction tanks are arranged on the three high-frequency vibration tables. The three reaction tanks are sequentially arranged in a clockwise direction as a filling station, a leaching station and a discharging station. A discharging component is arranged on the filling station. A micro-foam generating module is arranged on one side of the leaching station. The micro-foam generating module is arranged on the support table. A leakage-proof collecting barrel is arranged below the discharging station. The application is a technical solution for innovation from the mass transfer principle level. The application can not only realize continuous physical transportation of soil, but also actively drive the targeted transfer of pollutants from soil to leaching medium through ATP bionic mechanism, and systematically solve three core challenges of mass transfer efficiency, operation cost and secondary pollution.

This invention provides a method for recycling and upgrading spent lithium iron phosphate (LFP) cathode materials to regenerate lithium manganese iron phosphate (LFP). The method utilizes a manganese ion-catalyzed hydrogen peroxide and sulfuric acid system to leach the spent LFP, improving acid leaching efficiency. Simultaneously, the manganese ions remaining after acid leaching are used as a manganese source to generate LFP precursors, ultimately synthesizing high-performance LFP cathode materials. This invention features a simple process, low cost, and is suitable for large-scale industrial production.

The utility model relates to the technical field of waste gas treatment, and discloses VOCs waste gas emission reduction and energy conservation equipment which comprises an adsorption box, the adsorption box is internally divided into a first area and a second area; a stirring box in which an adsorbent is arranged is mounted on the inner top wall of the first area; a stirring mechanism is mounted in the stirring box; a connecting assembly is further mounted in the first area; an air inlet pipe, a motor and a conveying assembly are mounted outside the adsorption box; the gas inlet pipe is communicated with the stirring box, and waste gas reacting with the adsorbent is introduced into the stirring box; the motor is connected with the stirring mechanism to drive the stirring mechanism to rotate; the motor is further connected with the connecting assembly to drive the connecting assembly to intermittently communicate with the stirring box and the second area, so that the saturated adsorbent is intermittently input into the second area from the stirring box for regeneration; the conveying assembly is communicated with the stirring box and the second area, so that the adsorbent for regenerating adsorbability in the second area is intermittently input into the stirring box from the second area. The equipment is simple in structure and reasonable in layout, and the waste gas purification efficiency is improved.

The present invention is to optimize the front-rear torque distribution when regenerative braking is performed on the front and rear wheels at the time of braking based on accelerator operation. The present invention provides a control device for an electric vehicle in which a brake and an electric motor are provided for each of front and rear wheels, the control device being configured to perform the following processes: calculating a requested regenerative torque corresponding to an operation amount of an acceleration / deceleration operation at the time of deceleration; calculating a torque distribution ratio of the front and rear wheels based on vehicle information including a vehicle speed; calculating a regenerative torque available based on the requested regenerative torque, the vehicle information, and the torque distribution ratio; calculating a regenerative request value based on a requested brake torque generated by the brake based on pedal operation and the regenerative torque available; and calculating a regenerative torque of the front and rear wheels based on the regenerative request value, the requested regenerative torque, and the torque distribution ratio.

The present invention relates to the use of a circular RNA molecule in the preparation of a drug for treating muscle injury, wherein the circular RNA molecule is circTXNIP, and its buffalo source sequence is shown in SEQ ID NO: 1. Overexpression of circTXNIP promotes the generation of circTXNIP-encoded peptides, thereby increasing the proliferation and differentiation of myoblasts; the circTXNIP forms a circTXNIP nucleic acid complex with liposomes as a component for preparing a drug for treating muscle injury. The circTXNIP-encoded peptide generated after the translation of the circTXNIP provided by the present invention can promote the repair of muscle injury, so circTXNIP is expected to be developed as a nucleic acid drug for the preparation of drugs for treating muscle injury, and can be used for treating muscle injury by local intramuscular injection.

This invention discloses a method for regenerating and utilizing the rich absorbent solution for capturing CO2 / SO2 using an organic amine method, comprising the following steps: S1. For the rich absorbent solution system obtained by treating CO2 / SO2 mixed gas with organic amine, CO2 gas is desorbed using a first-stage thermal desorption method, and then an alkaline solution M(OH) is introduced. n SO3 in the rich solution 2‑ Primary mineralization is M(SO3). n / 2 Precipitate forms and a mother liquor is obtained; S2. CO2 is continuously passed into the mother liquor to remove inorganic cation M. n+ Secondary mineralization is M(CO3). n / 2 After precipitation, residual CO2 gas in the mother liquor is desorbed using a two-stage thermal desorption method, thereby regenerating the organic amine solution. This method employs two-stage series mineralization and two-stage series pyrolysis to ensure high-purity regeneration of the organic amine solution, while simultaneously producing sulfite and carbonate products, achieving the resource-based conversion of CO2 and SO2 in the absorbent solution.

A water softening device (100) is provided with: a water softening chamber (201) having a weakly acidic cation exchange resin (101) and generating soft water from raw water containing a hard component; a neutralization chamber (202) that has a weakly alkaline anion exchange resin (102) and neutralizes the soft water; a diaphragm that partitions between the water softening chamber (201) and the neutralization chamber (202) such that soft water can pass therethrough; a first electrode (103) that functions as an anode during regeneration of the weakly acidic cation exchange resin (101); and a second electrode (104) that functions as a cathode during regeneration of the weakly alkaline anion exchange resin (102). The first electrode (103) is provided in the water softening chamber (201) so as to be surrounded by a weakly acidic cation exchange resin (101), and the second electrode (104) is provided in the neutralization chamber (202) so as to be surrounded by a weakly alkaline anion exchange resin (102).

This invention relates to a method for regenerating sputtered titanium targets, titanium targets, and titanium target assemblies, specifically relating to the field of target materials. The regeneration method includes: sequentially roughening, cleaning, and cold spraying the sputtered surface of the sputtered titanium target to obtain a regenerated intermediate target; and then heat-insulating and cooling the regenerated intermediate target to obtain a regenerated titanium target. The regeneration method provided by this invention, by employing a specific treatment process on the sputtered titanium target and utilizing a combination of cold spraying and heat insulation, achieves efficient regeneration of titanium targets, maximizing the value of high-purity titanium resources and reducing material costs.

The present application relates to compressed gas drying apparatus and method. The compressed gas drying apparatus (1) has: at least two containers containing renewable desiccant, a controllable valve system (7) consisting of a first valve group (8a) and a second valve group (8b), and a first regeneration pipeline (9a) and a second regeneration pipeline (9b), the former is equipped with a heating device (10), the latter discharges saturated regeneration gas, and the two are connected to different valve groups respectively; wherein the first regeneration pipeline (9a) contains an additional container (15) containing renewable desiccant between the exhaust port (13) or the blower (12) and the heating device.