460results about How to "Improve the desorption effect" patented technology

An absorbent, such as, for example, an active carbon, is provided in an intake air passage, for example, in an air cleaner, to efficiently adsorb fuel vapor. To ensure that fuel vapor adsorbed into the intake air passage can be efficiently desorbed even when there is only a small amount of the intake air, an intake throttle valve is provided upstream of the adsorbent and an opening of the intake throttle valve is throttled so as to decompress an area near the adsorbent. Desorption of fuel vapor also can be efficiently promoted by using a heater to directly heat the adsorbent in the intake air passage or by heating the intake air to indirectly heat the adsorbent.

The invention provides a smoke desulphurization agent. The desulphurization agent is aqueous solution containing a main absorption component, an activating agent, an anti-oxidation component and acid, wherein the main absorption component is one or more of alkyl piperazine, hydroxyalkyl piperazine and hydroxyalkyl piperazine ketone; the activating agent comprises piperazine and diazabicyclo; and the anti-oxidation component is at least one of 4-tert-butyl catechol, 2,6-di-tert-butyl-p-phenylcresol, acetone oxime and N,N-bi (2-ethoxy) glycine. The smoke desulphurization agent provided by the invention can remove and reclaim sulfur dioxide in the smoke, and has higher desulphurization rate; moreover, even if the smoke desulphurization agent is strongly oxidized and then is recycled, the absorption capacity for the sulfur dioxide is still stable; and in addition, the rich liquor formed by desulphurization after adopting the desulphurization agent has better desorption performance such as high desorption rate.

The invention discloses a method for coal bed methane mining by multi-element thermal fluid foam displacement. Multi-element thermal fluid is injected into a coal bed of an injection-production well group through an injection well, and foaming agent is injected at intervals. A multi-element thermal fluid foam slug is formed in the coal bed to displace the coal bed methane in order to improve the recovery efficiency of the coal bed methane. The method specifically includes that extracted coal bed methane is compressed and mixed with compressed air, and then the mixture is injected into a multi-element thermal fluid generation device for ignition, extracted processed ground water is mixed to produce the multi-element thermal fluid mainly with high-temperature and high-pressure water vapor and mixed gas of carbon dioxide and nitrogen, the produced multi-element thermal fluid is injected into the underground coal bed through the injection well, a foaming system composed of preferred alkyl ether sulfonate and corrosion inhibitor is injected from an oil jacket annulus at intervals, the multi-element thermal fluid foam slug is formed under the ground to displace the coal bed methane, and water is drained and gas is recovered from a production well. The method has the advantages that fuel is easy to obtain, principles are clear and distinct, and the like, and can provide guidance for implementation of well stimulation of the coal bed methane.

The invention discloses a renewable flue gas desulfuration agent and applications thereof, which aim at overcoming the defects that an adsorbent in the prior art is easily oxidized to generate heat stable salt, and thus the capability of the adsorbent in absorbing SO2 is lost, and the like. The desulfurization agent comprises the following compositions in percentage by weight: (A) 5-60% of diamine compounds containing ethoxyl or hydroxypropyl; (B) 2-40% of desorption auxiliaries; (C) 0.1-0.5% of an antioxidant; (D) 0.5-1% of a corrosion inhibitor; and (E) 5-90% of deionized water. The desulfurization agent can be used in the fields of coal-fired power plants, refinery enterprises, nonferrous metallurgy enterprises and the like, is low in energy consumption, capable of being recycled and free from secondary pollution, and heat stable salts are generated slowly.

The invention discloses a citric acid loofah sponge preparation method and an application technology. The preparation method provided by the invention is characterized by comprising the following steps of: adding 18-25 wt% of citric acid, 18-25 wt% of saponified loofah sponge and 50-60 wt% of water into a plugged Erlenmeyer flask, putting on a plug, carrying out refluxing at the temperature of 60-70 DEG C for 2-3h with stirring, heating up to the temperature of 110-120 DEG C, reacting for 2-3h, cooling, washing by using deionized water, carrying out pumping filtration until a filtrate is neutral, washing by using a few ethanol, and drying in a baking oven of 75 DEG C to obtain the citric acid loofah sponge. The citric acid loofah sponge has strong adsorption capability, can directly used for the adsorption and elution of various metal ions and organic dyes in a water body, is characterized by high adsorption efficiency, fast adsorption speed, good physical and chemical stability and excellent mechanical stability, and can be used within a wide soda acid range. Simultaneously, the citric acid loofah sponge has regeneration capability and is a natural green adsorbent.

A fuel vapor processing apparatus including: a passage for fluid; a tank port and a purge port formed on one end side of the passage; an atmospheric air port formed on the other end side; and four or more adsorption layers filled with a fuel adsorbing material, wherein the main adsorption layer, and a region provided on the atmospheric air port side of the main adsorption layer are provided; the adsorption layers other than the main adsorption layer, and separation parts which separate the adjacent adsorption layers are provided in the region, and in the at least two separation parts inside the region, when the cross-sectional area of each of the at least two separation parts perpendicular to a flow direction of the passage is converted into a circular cross-sectional area, a distance between the adjacent adsorption layers is larger than the mean value of diameters of the each separation part.

The invention relates to the field of organic waste gas treatment and resource utilization and particularly relates to a double-fluidized bed adsorption and desorption device and a method for continuous treatment of organic waste gas. The device provided by the invention comprises a fluidized bed adsorption device (1), a preheater (5) and a fluidized bed desorption device (6), wherein an adsorbent outlet at the bottom of the fluidized bed adsorption device (1) is connected with a feed port of the preheater (5); a discharge port of the preheater (5) is connected with a feed port of the fluidized bed desorption device (6); and a solid outlet of the fluidized bed desorption device (6) is connected with a solid inlet of the fluidized bed adsorption device (1). In the invention, continuous treatment of high-concentration organic waste gas can be realized, heat accumulation can be prevented, and the problems such as bed fire and explosion caused by the dissipation failure of the reaction heat due to the excessively high concentration of the high-concentration organic waste gas are avoided; and moreover, the desorption effect of the adsorbent and the exit concentration of concentrated VOC gas are improved, and the catalytic combustion or solvent recycling is facilitated.

The invention relates to an oil gas recovery device, comprising an anti-exposure centrifugal fan, a cold box, a refrigeration unit, a liquid storage tank, a liquid return pump, an oil storage tank, a first adsorption tank, a second adsorption tank, a vacuum pump, a nitrogen making unit, and Including the PLC automatic control system; the oil and gas are first transported into the cold box by the anti-exposure centrifugal fan, and the liquid oil condensed by the pre-cooling part, the first-level condensing part and the second-level condensing part of the cold box is sent to the liquid storage tank, and then returned to the storage tank. The liquid pump is sent to the oil storage tank for recovery; the oil and gas from the secondary condensing part are sent to the first adsorption tank after the heat is raised by the pre-cooling part, and the first adsorption tank and the second adsorption tank are cycled for adsorption and desorption. When the first adsorption tank or the second adsorption tank enters the desorption stage, the vacuum pump is turned on, and when the vacuum degree of the adsorption tank reaches the set value, the hot nitrogen gas is turned on to desorb the oil and gas with the hot nitrogen gas. By utilizing the advantages of the condensation method and the adsorption method to optimize the combination, the purpose of reducing energy consumption and eliminating potential safety hazards is achieved.

The invention relates to an absorbing agent for catching or separating carbon dioxide from gas mixture, which mainly comprises the components by weight percent: 10-50wt% of N-ethylethanolamine, 10-40wt% of tetramethylene sulfone and balance water. The absorbing agent adopts the N-ethylethanolamine as effective component, and the N-ethylethanolamine has high solubility for low-pressure carbon dioxide, good desorbing effect, lower reaction heat of absorption reaction and lower energy consumption for catching or separating the carbon dioxide; and as the 3-dimethyl amino-1-propyl alcohol has the functions of improving the desorbing effect and reducing the volatilization of water, so that the energy consumption of desorbing is further reduced. The absorbing agent can be used for catching or separating the carbon dioxide in various gas mixtures such as flue gas, refinery gas, natural gas, synthesis gas, shift gas, hydrogen preparation gas and the like.

The present invention is method of adding one kind of secondary amine and one kind of organic amine with steric effect into water or sulfolane solution of N-methyl diethanolamine to obtain the activator for removing H2S from gas mixture with or without CO2. The present invention provides two solution recipes. The recipe I for the solution suitable for removing H2S from gas mixture containing no or less organic sulfide consists of N-methyl diethanolamine 30-50 wt%, secondary amine 1-10 wt%, steric amine 1-15 wt% and water for the rest. The recipe II for the solution suitable for removing H2S from gas mixture containing organic sulfide consists of N-methyl diethanolamine 30-40 wt%, secondary amine 1-5 wt%, steric amine 1-15 wt%, water 5 wt% and sulfolane for the rest.

The invention discloses a method for displacing coal seam gas via horizontal well mixed gas, relating to the method of coal seam gas coal mining, which comprises the following steps: 1. A plurality of horizontal wells (10) are formed in the coal seam (30) through the horizontal well craft, which comprise injection wells (11) and harvesting wells (12) alternatively arranged at intervals ; 2. A high-pressure injecting equipment is used to inject the mixed gas into the coal seam (30) with coal seam gas via injection wells (11); 3. The mixed gas with coal seam gas is acquired in harvesting wells (12) until the methane concentration is lower than the coal mining concentration and the preservation concentration. The invention has the advantages of considering both the competitive absorption of strong replacement gas and the effect of permeation increase and methane gas partial pressure of feeble replacement gas; improving the recovery factor and the single yield of the coal seam gas, and reducing the coal mining cost of the coal seam gas, simultaneously, mothballing the waste gas geologically, and reducing and sealing waste gas at a maximum.

The invention relates to a membrane adsorbent for recycling nitrogen and phosphorus resources from waste water. A doping method is adopted to uniformly distribute resin capable of selectively adsorbing nitrogen and phosphorous into a casting film solution, a wet phase separation method is adopted for preparation, the casting film solution comprises 10-30wt% of polymer, 10-35wt% of resin, 4-30wt% of additive and the balance of solvent; the membrane adsorbent comprises a flat membrane adsorbent and a hollow fiber membrane adsorbent; and the membrane adsorbent can be used for preparing magnesium ammonium phosphate as a slow release fertilizer, thus the recycling of nitrogen and phosphorus resources is realized. The invention has the advantages that: the surface of the membrane adsorbent is provided with an open pore structure, the water flux is higher, and the adsorption and desorption performances of nitrogen and phosphorous ions are good; the preparation method of the membrane adsorbent is simple, easy to implement, low in cost, environmentally-friendly, safe and reliable as well as easy for realization of large-scale application and popularization, thus the preparation method has practical industrial application significance.

The invention discloses a decarburization solution for recovering and removing carbon dioxide gas from the carbon dioxide flooding produced gas of an oilfield, comprising a main absorbing component, an activating component, a corrosion inhibitor, an antioxidant, a defoamer and water, wherein the main absorbing component is K2CO3 or MDEA (methyldiethanolamine); an auxiliary absorbing component is DIPA (diisopropanolamine) or MEA (mono edawnol amine) or MMEA (methyl monoethanolamine) or AEEA (aminoethylethanolamine) or DMEA (dimethylethanolamine); the activating component is DEA (diethanol amine) or PZ (zinc dimethyldithiocarbamate) or AEP (polyoxyethylene potassium dodecyl phosphate) or TETA (triethylene tetramine) or DETA (diethylenetriamine) or TEPA (tetraethylenepentamine) or glycine; the corrosion inhibitor is V2O5; the antioxidant is sodium metavanadate or potassium tartrate; the defoamer is dimethyl silicon oil or hexanol or heptanol or octanol; and the ratio of the main absorbing component to the auxiliary absorbing component to the activating component to the corrosion inhibitor to the antioxidant to the defoamer is (0.2 to 0.3): (0.03 to 0.05): (0.01 to 0.03): (0.005 to 0.008): (0.005 to 0.008): (0.0005 to 0.001).

The invention discloses an in-situ remediation method for polluted place based on dynamic groundwater circulation. The in-situ remediation method couples and optimizes a dynamic groundwater circulation technology and an in-situ microbial or chemical reduction / oxidation technology, pollutants are repaired, fixed, detoxified by the reduction / oxidation effect of the in-situ microbial or chemical technology, and a dynamic groundwater circulation system reduces or removes the total amount of pollution in order to improve the desorption capacity of the pollutants and repair the transmission and distribution ability of a reagent in an underground environment. The in-situ remediation method for the polluted place fully performs the respective advantages of all above technologies, makes up for thedeficiencies of the technologies, and can improve the in-situ microbial or chemical repairing efficiency, reduce the cost and the energy consumption and shorten the repairing cycle by reducing the total pollutions and carrying out microbial or chemical reduction / oxidation, fixation and detoxification.

The invention relates to an environmentally-friendly eluent for treating heavy metal contaminated soil and heavy metal contaminated sludge, which is characterized by comprising the following components in part by weight: 15 to 20 parts of gluconic acid, 12 to 17 parts of sodium chloride, 0.3 to 1 part of sodium dodecyl sulfate, 2 to 2.7 parts of sodium carboxymethylcellulose and 965 to 970 parts of water. The environmentally-friendly eluent is prepared by the following process of: stirring the components in a mixing tank of 45 to 55 DEG C at the stirring speed of 180 to 200 revolutions per minute for 30 to 60 minutes. The environmentally-friendly eluent has the advantages that: the gluconic acid can play a good role in desorbing most of heavy metals in the soil, separating the desorbed heavy metals from the soil and making the separated heavy metals enter a liquid phase, and is an environmentally-friendly substance so as not to cause secondary pollution to the environment; the sodium dodecyl sulfate can improve the surface tension of solution and the complexing effect of the eluent; the sodium carboxymethylcellulose can capture heavy metal ions in the eluent and can be combined with the heavy metals to break the micelle forms of the heavy metals so as to achieve the effect of enriching the heavy metals; and the eluent has the characteristics of simple operation, low cost and wide application.

The invention belongs to the technical field of soil microbial restoration, and particularly relates to a microbial restoration agent for heavy metal contaminated soil and a restoration method. The restoration method mainly comprises the two steps of preparation of the microbial restoration agent and spraying restoration of the soil. Treatment is conducted on the metal contaminated soil by adopting the microbial restoration agent for the heavy metal contaminated soil and the restoration method, the content of heavy metal in the soil can be rapidly reduced, and the restoration effect is good. The restoration method is simple in operation and low in cost, the restoration method is low in project investment, the dosage of the microbial restoration agent can be adjusted according to practical conditions, when a plurality of metal elements exist in the contaminated soil, treatment can be conducted by mixing and matching different thalli to prepare a microbial restoration agent according to needs. The soil fertility is not damaged and indigenous microorganisms are not harmed when restoration is conducted on the soil by adopting the restoration method, secondary pollution does not exist, the microbial restoration agent and the restoration method are safe and environmentally friendly, and suitable for restoration of a large area of heavy metal contaminated soil, is good in practical application effect, and can be used in a large scale.

The invention discloses a restoration method of chromium-polluted soil. The restoration method comprises following steps: (1) an oxidizing agent is added into chromium-polluted soil so as to convert chromium into chromium VI via oxidation and obtain soil containing chromium VI; (2) a leacheate is added into the soil containing chromium VI for leaching or / and elution so as to obtain slightly toxic soil with chromium VI residue and a leacheate containing chromium VI, wherein the leacheate is an aqueous solution containing a desorption agent, and the desorption agent is a soluble sulfate; and (3) a reducing agent is added into the slightly toxic soil so as to realize reduction of the chromium VI residue and obtain nontoxic soil. Beneficial effects of the restoration method are that: high efficiency restoration of chromium-polluted soil can be realized; no secondary pollution is caused; the sulfate is taken as the desorption agent; desorption effect is excellent; and economic benefit is excellent.

The invention relates to a nickel aluminum composite oxide thin film material and a preparation method thereof. The material is used as an electrode material and an electro-adsorption material of a supercapacitor. Foam nickel is used as a matrix, the nickel aluminum composite oxide thin film material is synthesized on the surface of the matrix by an in-situ growth method, and the nickel aluminum composite oxide thin film material with a thickness of 15nm to 25nm is complete in crystal form and uniform in particle size distribution. Through an electrochemical capacitance test which is performed on the material, a result that the nickel-based nickel aluminum composite oxide thin film has a high specific capacitance and charge-discharge capacity is found out, so that the nickel-based nickel aluminum composite oxide thin film can be used as the electrode material of the supercapacitor. Simultaneously, a result that the nickel-based nickel aluminum composite oxide thin film has good electro-adsorption and desorption performances is found out, so that the nickel-based nickel aluminum composite oxide thin film can be used as an electro-adsorption agent.

The invention discloses an experimental method for raising gas desorption property, characterized by based on the experimental study of gas absorption, desorption and permeability by existing non-mechanical method, using an experimental device which comprises a gas bottle, a pressure-tolerant gas pipe, a valve, a gas storage tank, a drying agent, a pressure sensor, a desorption pot, a positive electrode, a constant temperature water tank, a guide wire, a high-voltage variable-frequency power source, a vacuum pump, a data collection card, a computer, a rubber pipe, a measuring tube, and an Erlenmeyer flask, putting an experimental coal sample in the desorption pot, using the high-voltage variable-frequency electric field to change the physicochemical properties of the coal and allow the moisture in the coal and different charged ions dissolved in the water molecules to directionally move, thus free and adsorbed gas is increased, and the desorption property is raised. According to the invention, compared with the gas desorption property obtained by using a natural coal sample, when the high-voltage variable-frequency power source output voltage is 2kV and the frequency is 40Hz, the desorption is averagely raised by 11.42%.

The invention belongs to the technical field of oil gas recovery and particularly relates to a method for preparing active carbon / silica gel oil gas absorbing composite material prepared by using rice husk. The rice husk is pickled and purified and the silicon component in the rice husk is dissolved out by using NaOH solution. The desiliconized rice husk is activated by H3PO4 into active carbon, the removed silicon is added with H2SO4 to prepare silicon gel, the prepared active carbon and silicon gel powder are crushed and formed, and the oil gas absorbing composite material is prepared by high-temperature calcining. The preparation method is simple, easy to implement and low in cost, and the prepared composite absorbing material has good absorbing effect on oil gas and can be regenerated easily.

The invention discloses a method for producing ethanol by high-efficiency simultaneous saccharification and cofermentation, which comprises the following steps: pretreating; concentrating and detoxifying; preparing yeast seed solution; performing simultaneous saccharification and cofermentation; and distilling / rectifying. When the method provided by the invention is used, the inhibition action of a monosaccharide component formed by hydrolysis of cellulose on cellulose is relieved, the enzymolysis saccharification efficiency and fermentation yield are improved, the recovery rate of hemicelluloses in bagasse is about 60 percent, the cellulose recovery rate is about 86 percent, and the total ethanol yield of dry bagasse can reach about 20 percent.

The invention discloses a preparation method and an application technology of a dimethyl diallyl ammonium chloride modified towel gourd vegetable sponge adsorbent, and is characterized in that the preparation method comprises the steps: peeling and denucleating mature fruits of towel gourd, washing with water to remove soil and impurities, drying, crushing, and carrying out chemical treatment drying to obtain acylating-chlorination towel gourd vegetable sponge; adding, by the mass percentage, 56-71% of dimethyl diallyl ammonium chloride, 10-20% of the acylating-chlorination towel gourd vegetable sponge, 12-26% of water and 0.5-2.0% of ammonium persulfate into a reactor, wherein the sum of the percentages of all the components is 100%; under the nitrogen protection and at a constant temperature of 45-55 DEG C, stirring and carrying out a reflux reaction for 4-5 h; and after cooling, washing with deionized water, carrying out suction filtration until a filtrate is neutral, drying in a vacuum drying oven, and thus obtaining the dimethyl diallyl ammonium chloride modified towel gourd vegetable sponge adsorbent. The adsorbent has the advantages of quite high adsorption capacity on grease, excellent physicochemical and mechanical properties, strong regeneration capacity, capacity of being repeatedly used many times, low cost, greenness and environmental protection.

The invention discloses a preparation method of undecylene amido propyl betaine modified diatomite. The method is characterized in that after diatomite is treated with 2 mol / L HCL, pretreated diatomite is obtained; the pretreated diatomite is subjected to organic modification by using absolute ethyl alcohol and (3-chloropropyl)trimethoxysilane; then 45%-55% of deionized water and 8%-18% of undecylene amido propyl betaine are added to a reactor in percentage by mass, the mixture is stirred for dissolution, then 28%-38% of organic diatomite is added, the mixture is evenly mixed, 5%-8% of hydrogen peroxide with the mass percentage concentration of 30% is added, the sum of percentages of all components is 100%, the mixture is stirred at the constant temperature of 65 plus / minus 2 DEG C for a reflux reaction for 4-6 h, solid-liquid separation is performed after cooling, separated solids are washed with deionized water until the filtrate is neutral, filtration and drying are performed, and the undecylene amido propyl betaine modified diatomite is obtained. The adsorbent has very high adsorption capacity for oil, has excellent physical and mechanical properties and high regeneration capacity, and capable of being reused, low in cost and environment-friendly.

The invention discloses a method for improving yield of liquefied gas by a downstream separation system of a catalytic cracking device. The method comprises the following steps: (1) firstly, expanding dry gas at the tower top of a re-absorption tower through an expander; (2) exchanging heat between the expanded dry gas and a mixture mixing compressed rich gas, rich absorption oil taken out from the tower bottom of an absorption tower and desorbed gas taken out from the tower top of a desorption tower in a heat exchanger, feeding the heat-exchanged mixture into a balance tank, feeding a gas phase obtained in the balance tank as a feeding material to the bottom of the absorption tower, and feeding a liquid phase as a cooling material to the top of the desorption tower; and (3) compressing the heat-exchanged dry gas in step (2) to the pressure of the dry gas at the tower top of the prior absorption tower through a compressor, discharging a part of the compressed dry gas as a product to the system, and circulating the residual part to an inlet of the expander. The method solves the problem of an internal cold source of the system by improving the process flow of the absorbing and stabilizing system, reduces the content of C3 and C4 components in the dry gas, and improves the yield of the liquefied gas.

The invention provides a phase change absorbent for capturing CO2 in the waste gas. The phase change absorbent for capturing the CO2 in the waste gas comprises an alkylol amine absorbent, an amine absorbent, a nanoparticle, a corrosion inhibitor, an antioxidant, a defoamer and water, the mass ratio of the alkylol amine absorbent to the amine absorbent, to nanoparticles to the corrosion inhibitor to the antioxidant to the defoamer to the water in the phase change absorbent for capturing CO2 in the waste gas is (15%-20%):(5%-10%):(0.01%-0.1%):(0.01%-0.2%):(0.01%-0.2%):(0.01%-0.1%):(70%-80%). Thephase change absorbent for capturing CO2 in the waste gas increases the absorptive capacity of CO2, increases the capturing rate of CO2, reduces the corrosion rate of equipment, improves the self-stability, reduces the regeneration temperature, reduces the energy consumption of regeneration, and improves the degradation effect.

The invention provides a device for recovering oil and gas by condensation-adsorption method. The device comprises a heat exchanger, two adsorbers, a dry-type vacuum pump, an absorption tower, an oil-rich pump, an oil-lean pump, an air discharge pipe, and is characterized in that the left end of the heat exchanger is provided with an oil-gas inlet; the right end of the heat exchanger is provided with an oil-gas outlet; the outlet is connected with the bottoms of the adsorbers through pipelines; the bottom of the heat exchanger is connected with an oil inlet of the dry-type vacuum pump through the pipelines; the bottoms of the two adsorbers are connected with an oil-gas inlet of the dry-type vacuum pump through the pipelines; the upper parts of the two adsorbers are connected with the air discharge pipe through the pipelines respectively; an oil-gas outlet and an oil outlet of the dry-type vacuum pump are connected with the lower part of the absorption tower through the pipelines respectively; an outlet of the oil-lean pump is connected with an oil inlet of the dry-type vacuum pump, the top of the absorption tower and a bottom outlet of the heat exchanger through the pipelines; and the bottom of the absorption tower is connected with an inlet of the oil-rich pump through the pipelines. The device has the oil-gas emission concentration detection value less than or equal to 5 g / m3 and the recovery rate more than or equal to 99 percent, can reduce the consumption of adsorbent by 10 to 50 percent, and particularly utilizes liquid oil condensed by the heat exchanger and lean oil together to cool the dry-type vacuum pump so as to further improve the vacuum degree of the dry-type vacuum pump, thereby having ideal desorption effect.

The invention discloses a preparation method and use of sulfydryl flax, which is characterized by comprising: adding 45 to 52 mass percent of thioglycolic acid, 35 to 40 mass percent of tetrahydrofuran, 23 to 30 mass percent of degummed flax, 1 to 1.5 mass percent of glacial acetic acid and 0.15 to 0.3 mass percent of concentrated sulfuric acid into a triangular flask with a plug, stirring and refluxing for 4 to 6 hours at 50 to 60 DEG C, washing with deionized water, filtering under vacuum till the filtrate is neutral, washing with a small amount of ethanol, drying in an oven at 35 DEG C, and obtaining the sulfydryl flax. The sulfydryl flax has high metal ion absorbability, has properties of sulfydryl and can be directly use to absorb and elute various metal ions in water, the absorptionefficiency and speed are high, the physical, chemical and mechanical properties of the sulfydryl flax are high, the sulfydryl flax can be used in a wide pH value range, the high regenerability of thesulfydryl flax, makes the repeated use number of the sulfydryl flax 30 percent higher than that of sulfydryl cotton, the waste from flax title is utilized, cost is saved, and environment pollution isavoided.

The invention discloses a preparation method and an application technology of a citric acid modified palm tree bark adsorbing agent. The preparation method is characterized by comprising the following steps of: washing palm tree bark by water to remove mud and impurities, drying and crushing the washed palm tree bark, mixing the crushed palm tree bark with a 8%-20% citric acid solution according to the proportion of 1g: 5ml-15ml after the palm tree bark is dried by a NaOH aqueous solution, reacting the mixture for 35-60 minutes at room temperature, heating the reacted mixture to 50-60 DEG C, reacting the heated mixture for 24-36 hours, heating the reacted mixture to 120-130 DEG C, reacting the heated mixture for 1-2 hours, cooling the reacted mixture, washing the cooled mixture with distilled water until no citric acid exists in washing liquid, mixing the washing liquid with a 10%-20% magnesium chloride solution according to the proportion of 1g: 5ml-12ml, reacting the mixture at room temperature, performing suction filtration on the reacted mixture, washing the filtered mixture with a 5%-10% magnesium chloride solution, and finally, baking washing liquid to obtain the citric acid modified palm tree bark adsorbing agent. The adsorbing agent has high adsorption capacity to basic dye, good physical and chemical properties, high mechanical stability and strong regeneration capacity, and is recyclable, low in cost and environment-friendly.

The invention disclose a high-efficient energy saving type activated carbon fiber organic exhaust gas recovery system, comprising at least two active charcoal adsorbers, an adsorption filter element arranged inside the active charcoal adsorbers, a valve provided with an embedded type valve core for the adsorption filter element; the valve comprises a flange, a sealing pad and an unsealing air cylinder; the flange is fixed above the adsorption filter element; the sealing pad as the valve core is arranged in a cavity which is composed of the flange and the adsorption filter element; the unsealing air cylinder is fixed above the sealing pad and is connected with the sealing pad by a connecting rod; the size of the sealing pad is adapted with the caliber of the flange. The sealing pad is arranged in the cavity which is composed of the flange and the adsorption filter element; the sealing pad is controlled by the unsealing air cylinder to seal a flange port from bottom to top; a sealing direction of the sealing pad is the same as an impact direction of the vapor in the course of the adsorption; therefore, the higher a vapor pressure is, the better the sealing effectiveness is.

The invention discloses a preparation method and an application of a pyromellitic dianhydride modified banana peel adsorbent, and is characterized in that the preparation method comprises the steps: washing cleanly banana peels, drying, then smashing, and thus obtaining preprocessed banana peels; then, according to the mass percentage concentration, adding 78-92% of N,N-dimethylformamide and 1.0-5% of pyromellitic dianhydride into a reactor, completely dissolving, and then adding 5-18% of the alkalized banana peels, wherein the sum of the percentages of the components is 100%; and at the constant temperature of 70+ / -3 DEG C, carrying out a reflux reaction for 3-6 h, carrying out suction filtration, washing to be neutral, drying, and thus obtaining the pyromellitic dianhydride modified banana peel adsorbent. The adsorbent can directly adsorb lead ions in a water body, is high in adsorption efficiency, has good physicochemical and mechanical stability, can be used in a relatively wide pH range, and can be renewable and be used repeatedly; the banana peels are natural biomacromolecules, are biodegradable, belong to agricultural waste reuse, and is easy to obtain and cheap; and the adsorbent is a natural green adsorbent.