75results about How to "Complete desorption" patented technology

The invention relates to a novel efficient and reversible ion type ammonia gas absorbent and belongs to the technical field of gas separation and purification. The absorbent is Lewis acid ion liquid prepared from pyridine or imidazole and derivative cations thereof and anions containing divalent metal cobalt ions. The absorbent can realize efficient absorption of ammonia gas through the chemical complexing effect between the divalent metal cobalt ions in the anions and ammonia gas molecules and the hydrogen bond effect between the cations and the ammonia gas molecules; and the absorbent has the advantages of good stability, easiness for desorption, capability of being circularly used for a plurality of times and the like, and the novel absorbent is provided for separation and recycling, and purification on the ammonia gas in industrial ammonia-containing tail gas.

A hydrogen storage alloy having an atomically engineered microstructure that both physically and chemically absorbs hydrogen. The atomically engineered microstructure has a predominant volume of a first microstructure which provides for chemically absorbed hydrogen and a volume of a second microstructure which provides for physically absorbed hydrogen. The volume of the second microstructure may be at least 5 volume % of atomically engineered microstructure. The atomically engineered microstructure may include porous micro-tubes in which the porosity of the micro-tubes physically absorbs hydrogen. The micro-tubes may be at least 5 volume % of the atomically engineered microstructure. The micro-tubes may provide proton conduction channels within the bulk of the hydrogen storage alloy and the proton conduction channels may be at least 5 volume % of the atomically engineered microstructure.

The invention discloses a technology for removing ferric trichloride from chlorination liquid in chlorobenzene production. The technology comprises the following steps specifically: collecting chlorination liquid generated in chlorobenzene production to a chlorination liquid intermediate tank; introducing the chlorination liquid in the chlorination liquid intermediate tank into a resin adsorption tower from the bottom of the resin adsorption tower, keeping full and soaking for 10-18 hours, discharging the chlorination liquid from the top of the tower, detecting the content of ferric trichloride in the adsorbed chlorination liquid, and when the content of ferric trichloride is larger than 10 ppm, stopping adsorption; using diluted hydrochloric acid to resolve ferric trichloride complexes adsorbed by the resin, and using water to wash the resin adsorption tower till the content of ferric trichloride in the scrubbing solution is smaller than 10 ppm. In the technology, the resin adsorption tower and a continuous automatic processing method are utilized to process ferric trichloride from chlorination liquid in monochlorobenzene production; the chlorination liquid is adsorbed by the resin adsorption tower to remove ferric trichloride from the chlorination liquid for one time, and the content of ferric trichloride in the chlorination liquid during the monochlorobenzene production after the chlorination reaction is reduced from 150-1000 ppm to 0-10 ppm.

The invention relates to a multi-stage thermal desorption remediation system for organic polluted soil, and belongs to the technical field of soil remediation. The system consists of a first-stage thermal desorption device, a second-stage thermal desorption device, a tail gas treatment device, a secondary combustion chamber and a falling type conveying belt. Soil is preheated and desorbed primarily by high-temperature tail gas generated by thermal desorption; a two-stage or multi-stage polluted soil treatment method is adopted, and the residual heat of the tail gas is utilized fully, so that the comprehensive utilization ratio of heat energy of the system is improved obviously; soil enters a thermal desorption cabin with relatively high temperature under the gravity effect by virtue of the S-shaped falling type conveying belt, so that the energy consumption of a conveying and transmitting device and the conveying process is prevented; meanwhile, the soil conveying path and the conveying time are prolonged, the retention time is prolonged, and thus soil pollutants are desorbed relatively fully. The thermal desorption soil remediation system is reasonable in structure, is simple to operate, is convenient to use, has no secondary pollution, recycles residual heat of tail gas, and has wide application prospect and high practical value.

The invention discloses a method for efficiently extracting V / W / Ti from a waste denitration catalyst. The method comprises the following steps of carrying out soot blowing, water washing, grinding and sieving on the waste denitration catalyst, heating, stirring, carrying out alkaline leaching, and filtering to obtain filtrate rich in V and W and coarse titanium slag; introducing the filtrate into a glass tube filled with anion exchange fibers to realize efficient separation of VO3 <-> and WO4 < 2-> in the filtrate, and then adding ammonium chloride into the filtrate to precipitate vanadium; washing the ion exchange fiber adsorbing WO4 < 2-> with a desorption solution, and evaporating and crystallizing the obtained solution to obtain ammonium paratungstate; and finally, adding the coarse titanium slag into an acid solution, adding a filter aid, stirring, filtering, washing and drying to obtain acidified titanium slag, and roasting to obtain purified TiO2. According to the technical route provided by the invention, the recovery rates of V, W and Ti are correspondingly 100%, 100% and 76.37% at most, the efficient recycling of the waste denitration catalyst is realized, and the method has great economic and social benefits.

The invention discloses an activated carbon fiber desorption method. The method comprises the steps as follows: (1) activated carbon fiber adsorbing organic matter is placed in a vacuum environment; (2) the activated carbon fiber is energized until the temperature of the activated carbon fiber reaches or exceeds the boiling point of the adsorbed organic matter, and the organic matter is evaporatedfrom the activated carbon fiber; (3) the organic matter escaped from the activated carbon fiber in the vacuum environment is extracted from the vacuum environment. According to the activated carbon fiber desorption method, the activated carbon fiber is subjected to conductive desorption in the vacuum environment by use of the conductivity of the activated carbon fiber, so that the temperature ofthe activated carbon fiber reaches or exceeds the boiling point of the adsorbed organic matter, the organic matter in the activated carbon fiber can be desorbed thoroughly, the desorption cost is reduced, the desorption effect is good, and the adsorption function of the activated carbon fiber can be completely recovered after desorption, and the drying problem after wet desorption is solved.

The invention relates to a motorcycle fuel evaporative pollutant control system comprising a carbon canister and a gasoline cut-off valve, an air inlet absorption port of the carbon canister is connected with an oil tank vent pipe by a fourth pipeline, the gasoline cut-off valve is arranged on a first pipeline, a pressure control valve of the carbon canister and an air outlet desorption port of the carbon canister are communicated with an air path of a carburetor, the pressure control valve and the desorption port of the carbon canister are respectively communicated with a three-way pipe by a second pipeline and the first pipeline, and the three-way pipe is communicated with the air path of the carburetor after being communicated with a third pipeline. The adoption of the technical proposal can not only reduce the emission of fuel evaporative pollutants, but also reduce the impacts of the fuel evaporative pollutants on the working condition emission, thereby leading the exhaust emission of motorcycles to achieve the requirement of being more environment-friendly.

The invention discloses a process for adsorbing, desorbing and catalytically oxidizing VOCs by using activated carbon in the pharmaceutical industry. An alkaline washing tower group, an activated carbon group, a catalytic oxidation device and a fan are included; the activated carbon group comprises a first activated carbon box, a second activated carbon box and a third activated carbon box, the upper part of the activated carbon group is connected with the inlet pipeline, the lower part is connected with the gas outlet pipeline, and the activated carbon group is connected with the catalytic oxidation device through a branch pipeline to form an annular loop; a catalyst is arranged in the catalytic oxidation device, porous thin-wall honeycomb ceramic is used as a carrier of the catalyst, and a layer of nano activated aluminum oxide and a layer of Pt metal modified nanoscale material H2Pt(OH)6 are sequentially loaded on the surface of the catalyst; the volume of the catalytic oxidation reactor can be reduced, and the manufacturing cost is reduced; the energy of the high-temperature gas subjected to catalytic oxidation is utilized twice, so that the operation cost of the device is reduced; and the halogenated compound is completely converted through catalytic oxidation, so that the activated carbon is completely desorbed, and the safety of the device is guaranteed.

The parylene surface coating equipment and coating process for ancient borrowed books and documents of the present invention relate to the gas phase deposition coating process and coating equipment for the reinforcement and protection of parylene on the surface of ancient borrowed books, archives, documents, etc. . The structure of coating equipment includes evaporation chamber, cracking chamber, polymerization deposition chamber, cold trap, throttle valve, vacuum mechanical pump and refrigerator. The coating process is to put the p-xylene raw material in the evaporation boat of the evaporation chamber; clamp the books or documents to be coated on the book expansion bracket of the polymerization deposition chamber; vacuum the system to make the vacuum degree of the system below 10pa Raise the temperature of the cracking chamber to 600°C-700°C, open the cold trap, reheat the evaporation chamber, adjust the pumping speed of the throttle valve, keep the vacuum degree of the precipitation chamber at 20-40pa, and start the transmission motor at the same time to make the book unfolding bracket rotate, The p-xylene gas generated by the evaporation chamber enters the cracking chamber, enters the polymerization deposition chamber through the gas splitter, and is coated on the surface of the rotating book or document.

The invention discloses a method for treating high-concentration ammonia nitrogen in chemical waste gas. The method includes the steps: firstly, placing the chemical waste gas in an absorption tower and absorbing the chemical waste gas by orthophosphoric acid to generate diammonium hydrogen phosphate and ammonium dihydrogen phosphate mixed solution; secondly, continuously circulating the solution by a lift pump and repeatedly absorbing ammonia until diammonium hydrogen phosphate is completely generated; thirdly, introducing the generated diammonium hydrogen phosphate into an ammonia still containing Pd-Zn-Hg-Cr As-V / titanium dioxide catalysts through a pipeline and adding an organic denitrifying agent comprising polyvinyl acetate, trifluoromethyl benzoic acid and methylbenzyl alcohol; and fourthly, introducing steam into the ammonia still and decomposing the diammonium hydrogen phosphate into ammonium dihydrogen phosphate and nitrogen under the action of the organic denitrifying agent and the catalysts. Phosphoric acid is used as an absorbent for absorbing ammonia in waste gas without adjusting pH (potential of hydrogen) value, and secondary pollution is avoided as decomposition of the diammonium hydrogen phosphate is promoted by adding the organic denitrifying agent and the diammonium hydrogen phosphate is completely converted into nitrogen to be exhausted under the catalytic action of the catalysts. Besides, the generated ammonium dihydrogen phosphate can also be used as an absorbent for reabsorbing the ammonia, so that the absorbent can be recycled.

The invention relates to the technical field of oil gas purification equipment, specifically to an efficient oil gas purification system. The system comprises an adsorption device, a stabilizer, a vacuum pump, a controller, a heat exchanger and a catalytic oxidation device, wherein the adsorption device is provided with a first air inlet pipe, a second air inlet pipe, a first air outlet pipe and asecond air outlet pipe; the adsorption device is communicated with an air inlet of the stabilizer through the first air outlet pipe; the second air outlet pipe is communicated with an air inlet of the vacuum pump; an air outlet of the vacuum pump is communicated with an air inlet of the stabilizer through a pipeline; the controller is installed on an air outlet of the stabilizer; an air outlet ofthe stabilizer is communicated with an air inlet of the heat exchanger through a pipeline; an air outlet of the heat exchanger is communicated with a low-temperature air inlet of the catalytic oxidation device through a pipeline; and a low-temperature air outlet of the catalytic oxidation device is communicated with an air inlet of the heat exchanger through a pipeline. The efficient oil gas purification system is high in purification efficiency, low in operation cost and simple in process.