36results about How to "Shorten desorption time" patented technology

The method for activated carbon fiber variable voltage desorption gas relates to a method of desorption gas by using activated carbon fiber. The method solves the problem of high energy consumption in the prior art. The method comprises: the two ends of an adsorbent bed are sequentially switched on 4-6V of alternating voltage to be heated for 28-32s, 8-12V of alternating voltage to be heated for 28-32s, 13-17 V of alternating voltage to be heated for 28-32s, 18-22 V of alternating voltage to be heated for 28-32s and 13-17 V of alternating voltage, and is then continuously heated by changing the 13-17 V of alternating voltage into 4-6V of alternating voltage when the temperature reaches 70-72 DEG C; the temperature of the carbon fiber is kept within the range of 69-71 DEG C for 8-12min, and the gas with the mass percent of 90-99% can be obtained by desorption. The method has short desorption time, low energy consumption, and simple operation and technique.

Disclosed is a method for separating normal alkane from C5 to C6 alkane isomerized products. Isopentane is removed from raw materials, and the obtained materials are added into an adsorption separation post to adsorb normal alkane under 2.0-4.0 MPa, 100-150íµ and liquid phase condition, after saturation by adsorption, the adsorption separation post is flushed with flushing agent of isopentene, then desorbed by desorbing agent of C7 to C9 normal alkane. The method can separate normal alkane in light hydrocarbon isomerized products, and the used desorbing agent is less, the desorbing time is short.

The invention relates to an automatic high-efficiency energy-saving purification system for industrial volatilizable organic pollutants, which is characterized in that: (1) both opposite side walls of an active carbon bed body of an adsorption bed are set into side walls with hollow structures, an active carbon clapboard is set into an active carbon clapboard with a hollow structure, the active carbon clapboard with the hollow structure is communicated with the side walls with the hollow structures, and the two side walls with the hollow structures are respectively provided with a hot air inlet and a hot air outlet; and (2) a catalytic combustion bed is connected with a plate-type heat exchanger, and the plate-type heat exchanger is connected with the hot air inlets on the side walls withthe hollow structures of the adsorption bed through an adsorption bed heating fan. The automatic high-efficiency energy-saving purification system for the for industrial volatilizable organic pollutants has a simple and reasonable structure, can effectively reduce energy consumption, improve the purifying rate, prolong the service life of a catalyst, shorten the desorption process time, improve the purifying efficiency and reduce the operating cost, and is safe and reliable.

The invention relates to a novel capacitive deionization treatment device. A spraying device is arranged at the top of a device body, and four pieces of organic glass are arranged at the side edge part. A water inlet is formed in the lower left side of the side edge part, and a fresh water outlet is formed in the upper right side of the side edge part. The left organic glass, a sealing washer anda negative plate are fixed through studs. The right organic glass, a sealing washer and a positive plate are fixed through studs. A first channel, a second channel... an nth channel are formed in thedevice body at intervals through stainless steel base plates, and a Z-shaped circulation channel is formed among the first channel, the second channel... the nth channel. The stainless steel base plates and the organic glass on the side edges are fixed through studs, two same-stage electrode plates are arranged on the two sides of the same stainless steel base plate, the two same-stage electrode plates are negative plates or positive plates, the number of the negative plates and the number of the positive plates are both n, and the negative plates and the positive plates are arranged in the device body in parallel in a staggered mode.

The invention provides an organic waste gas recovery device and process, and belongs to the technical field of organic waste gas treatment. The device comprises a condensation system, a membrane separation system, an adsorption system and a vacuum system, the vacuum system comprises a first vacuum pump and a second vacuum pump which operate independently, an inlet and an outlet of the first vacuum pump are connected with the membrane separation system and the condensation system respectively, and organic gas separated from the membrane separation system is circulated back to the condensation system through the first vacuum pump; an inlet and an outlet of the second vacuum pump are respectively connected with the adsorption system and the condensation system; and desorbed organic gas in the adsorption system is circulated back to the condensation system through the second vacuum pump. According to the invention, the membrane separation system and the adsorption system respectively carry out organic gas and air separation and organic matter desorption through independent vacuum pumps, so that the two systems do not interfere with each other, the intermittent vacuum operation of the adsorption system does not influence the continuous vacuum operation of the membrane separation system, and the working stability of the membrane separation system is effectively guaranteed.

The invention discloses a high-performance carbon nano-material adsorbent and preparation and application thereof. The high-performance carbon nano-material adsorbent is composed of a carbon nano-material and an adhesive. Mass fraction of the carbon nano-material is 80-97 wt%. Specific surface area of the adsorbent is 800-2200 m<2>/g. The pore volume ratio of micropore to mesopore to macropore is (1-3): (1-6): (1-10). The invention also discloses a method for directly preparing the adsorbent by the utilization of a compound of the carbon nano-material obtained during the chemical vapor deposition process and an inorganic compound carrier. The adsorbent has advantages of long service life, large handling capacity, low preparation cost, etc., and is especially suitable for adsorption of low-concentration nonpolar organic matter in a fluid.

The invention discloses an adsorbing agent based on a carbon nanomaterial. The adsorbing agent is prepared from the carbon nanomaterial and an adhesive, wherein the mass fraction of the carbon nanomaterial ranges from 30 to 95 percent. The specific surface area of the adsorbing agent is 100 to 2000m<2>/g, and the pore volume proportion of micropores, mesopores to macropores is (1 to 2) to (1 to 5) to (1 to 20). The invention also discloses a method for preparing the adsorbing agent by adding a pore-forming agent. The adsorbing agent has the advantages of long service life, big treatment capacity, low preparation cost and the like, and is suitable for adsorbing non-polar organic compounds in a fluid.

The invention discloses adsorption and in-situ desorption and regeneration equipment for volatile organic compounds. The adsorption and in-situ desorption and regeneration equipment comprises a left adsorption device, a right adsorption device, a condenser, a vacuum pump, a demister, a drying draught fan and a heater, wherein an organic waste gas pipeline inlet is connected with the left adsorption device and the right adsorption device through a first left valve and a first right valve respectively; the upper ends of the left adsorption device and the right adsorption device are connected with an exhausting barrel through a second left valve and a second right valve respectively; a steam pipeline inlet is connected with the left adsorption device and the right adsorption device through asixth left valve and a sixth right valve respectively. By adopting the adsorption and in-situ desorption and regeneration equipment, internal circulation of dry gas is realized; after being purified,the dry gas is discharged and secondary pollution is not caused; rapid desorption can be carried out in a desorption process, the utilization amount of high-temperature steam is reduced and the desorption time is shortened; an adsorbent is completely regenerated and the adsorption performance is completely recovered; and the drying time and the cooling time are shortened and energy saving and consumption reduction are realized.

The invention discloses a climate chamber for measuring the VOC release amount through a multi-chamber method. The climate chamber comprises a case and a clean gas generation device, the case is provided with a front case body and a rear case body, six experiment cabins and a jacket temperature control system are arranged in the front case body, a pressure regulating valve is arranged on the frontsurface of the front case body, a sampling pipe is arranged on a cabin door of each experiment cabin, and a dry and wet gas mixing humidity regulating system and a numerical control acquisition system are arranged in the rear case body on the rear side of each experiment cabin; an electric control mechanical chamber is arranged on one side of the case, and a logic control system, a refrigeratingsystem and a man-machine interaction system are arranged in the electric control mechanical chamber; the clean gas generating device is connected with the dry-wet gas mixing humidity adjusting systemand the electromagnetic valve flow adjusting control system, the dry-wet gas mixing humidity adjusting system is connected with the experiment cabin, and the experiment cabin is connected with the numerical control collecting system. Compared with the prior art, the climate chamber has the advantages that the background concentration requirement specified in the national standard is completely met; the energy consumption is low; the desorption time is reduced; and the use efficiency of equipment is improved.

The invention relates to a Chinese prickly ash peel aroma component detection method. The method is characterized by, to begin with, grinding a Chinese prickly ash peel sample to be detected into powders; after sieving, weighing a certain amount of Chinese prickly ash peel powders and placing the powders into a headspace bottle, wherein the headspace bottle is sealed by a silica gel isolation pad;and then, carrying out GC-MS detection directly on the fully-shaken sample. Through combination of headspace solid-phase microextraction and gas chromatography-mass spectrometry (GC-MS) technology, prickly ash aroma components are extracted and analyzed, and solvent extraction is not required for sample pretreatment, so that the method is green and safe, is easy and fast, prevents tedious pretreatment process, uses small amount of samples and can visually reflect Chinese prickly ash peel aroma component characteristics.

The invention discloses a chlorobenzene catalytic degradation method by absorption-low temperature plasma. The method includes steps of placing Ag/AC catalyst in a discharge zone of a dielectric barrier discharge low-temperature plasma reactor; carrying chlorobenzene in the air and charging to the dielectric barrier discharge low-temperature plasma reactor in a gas form; absorbing chlorobenzene by Ag/AC catalyst; at the moment, the plasma power of the reactor is under a closing state; after being absorbed fully, charging oxygen-containing gas while stopping blowing the air carried with chlorobenzene; opening the plasma power of the reactor, discharging and oxidizing the absorbed chlorobenzene by the plasma, and realizing the degradation of chlorobenzene. The method combines adsorptive catalyst with low-temperature plasma, displays advantages of the low-temperature plasma of low energy consumption of low-temperature plasma, rapid chemical reaction, complete purification, wide adaptation, and effectively realizes the chlorobenzene degradation.

The invention discloses a catalytic adsorption-desorption isomerization method. According to the catalytic adsorption-desorption isomerization method, reaction raw materials are delivered into a catalyst bed, and isomerization reaction conditions are achieved; reaction is carried out without discharging materials; pressure is reduced for desorption; and a reaction product is discharged from the catalyst bed; wherein the ratio of the reaction time to the desorption time is controlled to be larger than 10. Gas phase reaction process and pressure swing adsorption process are combined so as to increase reaction conversion rate, and obtain the target product with a concentration higher than a chemical equilibrium value.

The invention relates to a high-efficiency energy-saving absorption device of an industrial volatilizable organic pollutant. The device comprises an air inlet flaring part, an active carbon bed body and an air outlet reducing part, wherein two opposite faces of the active carbon bed body are connected with the air inlet flaring part and the air outlet reducing part respectively; an air distribution plate is fixedly arranged on the air inlet flaring part; a plurality of layers of active carbon partition plates are arranged in the active carbon bed body; two opposite side walls of the active carbon bed body are set as side walls having a hollow structure respectively; the active carbon partition plates have the hollow structure; the active carbon partition plates having the hollow structureare communicated with the side walls having the hollow structure; and a hot air inlet and a hot air outlet are respectively formed on the two side walls having the hollow structure. The high-efficiency energy-saving absorption device of the industrial volatilizable organic pollutant is simple in structure, scientific and reasonable in design, safe and reliable, effectively utilizes catalytic combustion waste heat, shortens desorption time, reduces the consumption of electric energy, reduces operating cost, and is accordant with the national policy of energy conservation and emission reduction.