174results about How to "High desorption rate" patented technology

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 present invention provides a low power consumption desorption apparatus, which utilizes a pair of electrodes coupled to an absorbing material to provide an electric current flowing through the absorbing material so as to desorb the substances absorbed within the absorbing material. By means of the desorption apparatus of the present invention, the absorbing material is able to enhance the desorbing efficiency and reducing power consumption during desorption. The present invention further provides a dehumidifier using the low power consumption desorption apparatus for providing a continuous dry air flow to desorb and regenerate the moisture from the absorbing material so that the dehumidifier is capable of removing moisture in the air repeatedly to reduce the humidity.

The invention relates to a mixed organic solution for trapping CO2 and SO2 acid gas through phase transformation, and belongs to the technical field of environmental protection and gas purification. The mixed organic solution is prepared from, by mass, 5-35 parts of organic amine absorbing agents and 65-95 parts of organic solvent; one of chain amines, diamines, steric hindered amines, alcohol amines and amides or mixtures of more than two of chain amines, diamines, steric hindered amines, alcohol amines and amides which are mixed in any proportion is/are adopted as the organic amine absorbing agents; one of alcohols, ethers, ketones and esters or mixtures of more than two of alcohols, ethers, ketones and esters which are mixed in any proportion is/are adopted as the organic solvent. The mixed organic solution aims at solving the problem that regeneration energy consumption is high in decarbonizing and desulfurizing of an organic amine regeneration method.

The invention relates to a method and a device for reducing regeneration energy consumption of decarburization absorption liquid. A heating regeneration process is carried out to a rich solution which absorbs carbon dioxide and is discharged from a bottom of an absorption column. Heat is recovered, by a heat pump, from gas discharged from a top of a regeneration column and/or a heat-exchanged and temperature-reduced barren solution discharged from the bottom of the regeneration column, wherein the heat is supplied to be provided for heating liquid in the bottom of the regeneration column and a heat-exchanged rich solution. With the heat pump, temperature of the rich solution is increased and the energy consumption of heating is significantly reduced, and furthermore, desorption efficiency of acid gas in the regeneration column is increased. After the majority of the rich solution is subjected to a flash evaporation process by reducing the pressure to a normal pressure, the flash-evaporated solution is free of heating regeneration and is directly flowed back to the regeneration column for absorbing high-concentration CO2, so that regeneration amount of the rich solution is greatly reduced with an absorption effect being ensured, thereby regeneration energy consumption is reduced and decarburization operation cost is saved. Supersonic wave is used for desorbing CO2 in a flashed solution so that desorption efficiency of CO2 can be further improved.

The invention relates to a renewable flue gas desulfurization agent and the preparation method thereof. The flue gas desulfurization agent is the aqueous solution of 1,4-bis(2-hydroxypropyl) piperazinyl sulfate containing 30% of 1,4-bis(2-hydroxypropyl) piperazinyl by mass. The flue gas desulfurization can be prepared from the of 1,4-bis(2-hydroxypropyl) piperazinyl and other raw materials, by mixing according to a certain proportioning at normal temperature. Because the pKa1 of the conjugate acid of the 1,4-bis(2-hydroxypropyl) piperazinyl is 3.8, and the pKa2 of that is 8.2, the obtained flue gas desulfurization agent achieves the advantages of large absorbing capacity, high de-absorbing ratio, low de-absorbing temperature and suitable temperature difference in the absorbing and de-absorbing process; can reduce the energy consumption in absorbing and de-absorbing process obviously, and is very suitable for the application in process of removing SO2 in discharged flue gas in coal fired power plant and so on.

The invention provides a flue gas absorbent of desulfurization and denitrification and a desulfurization and denitrification method thereof. The flue gas absorbent of desulfurization and denitrification is prepared from the following components in percentage by weight: 2%-40% of an absorbing component, 0.02%-10% of an active component, 1%-20% of a reducing component, 0.001%-0.1% of an antioxidant and the balance of water, wherein the pH value of the absorbent of desulfurization and denitrification is 3.5-7; the absorbing component is one or more of piperazine and derivatives thereof; the active component is diazabicyclo; and the reducing component is urea. According to the flue gas absorbent of desulfurization and denitrification, provided by the invention, NOx in the flue gas can be effectively reduced into nitrogen, and SO2 is desorbed and regenerated after being absorbed, so as to obtain pure SO2. The flue gas absorbent of desulfurization and denitrification is high in desulfurization and denitrification rate, rapid to desorb, high in desorption rate, and relatively low in desorption energy consumption, and has high practicability.

The invention discloses a method for recovering high yield and high purity hydrogen and ethylene from refinery dry gas. The method comprises the following steps: a first stage pressure swing adsorption, a second stage pressure swing adsorption, membrane separation, cold oil absorption and coarse distillation. The invention has the advantages that the method combines adsorption separation method, membrane separation method and cold oil absorption method to process refinery dry gas, so as to obtain high purity hydrogen, ethylene and C2 and above gas rich in ethane, ensure high yield, and achieve clear separation of hydrogen, ethylene and gas rich in ethane.

The invention relates to a method for extracting rose flavone from a rose residue solution. The method comprises the following steps: (1), filtering the rose residue solution, concentrating, adding ethyl alcohol to adjust the pH value of the solution, refrigerating and standing in the absence of light; (2), performing suction filtration on the solution in the step (1), and concentrating, so as to obtain rose flavone pigment coarse powder; (3), performing separation and purification on the rose flavone pigment coarse powder obtained in the step (2), so as to obtain eluant; (4), concentrating and drying the eluant, so as to obtain dry flavone. According to the invention, the flavone extraction ratio reaches above 8% to the maximum extent, and is greatly improved compared with the flavone extraction ratio being not higher than 5% in the prior art; the obtained flavone is bright red in color, and can be widely applied to the fields of medicine and food.

The present invention adopts macroporous resin adsorption to make chrysanthemum extract undergo the processes of resin column treatment, elution, collecting elute, concentrating and drying so as to obtain the purified chrysanthemum total flavone. The transferrin rate of its total flavone can be up to above 95%, and its purified total flavone content can be up to above 65%, its reproducibility is good, and said resin can be repeatedly used.

The invention discloses a method for extracting total flavonoids from chrysanthemums. The method is to extract the chrysanthemums with ethanol, and then use a macroporous resin adsorption method to put the extract on a column, elute, collect the eluate, concentrate and dry to obtain the total flavonoids of chrysanthemums. The flavonoid approach. The method for extracting total flavonoids from chrysanthemums involved in the present invention is a method with simple and quick operation. The selected macroporous resin has the characteristics of large adsorption capacity and high desorption rate. The method of the invention uses ethanol as a solvent, which is cheap and nontoxic. The content of the total flavonoids extracted from the chrysanthemum by the method of the invention can reach more than 55%, and the reproducibility is good, and the resin can be used repeatedly.

The invention discloses a method for synergistically desorbing gold thiosulphate coordination ions from strongly-alkaline anion exchange resin. A mixed solution of Na2SO3 and NaOH serves as a desorption agent, and dynamic desorption is conducted on the strongly-alkaline anion exchange resin loaded with the gold thiosulphate coordination ions. According to the method, the synergistic effect of two components, namely SO3<2> and OH, is utilized, and desorption is conducted on the [Au(S2O3)2]<3> coordination ions adsorbed on the strongly-alkaline anion exchange resin; and the desorption rate of gold can reach 97% or above. Compared with traditional methods that a thiocyanate solution or a polythionate solution or a nitrate solution or another type of solution composed of a single component is adopted for desorption, the desorption method has the remarkable beneficial effects that reagents are free of toxicity; performance is stable; desorption cost is low; resin desorption and regeneration are completed by the same step; and the gold in the desorption solution can be further recycled conveniently. And good industrial application prospect is achieved.

The invention discloses condensation mother liquid waste water pretreatment and a resource system and a method in a compound neutralization reactor in a disperse blue 56 production process, which belongs to the waste water treatment field. The method comprises the following steps: highly basic condensation mother liquid waste water in the disperse blue 56 production process and a mixed acid solution (sulfuric acid and sulfamic acid) in the compound neutralization reactor are neutralized, three purposes of reducing the pH value of waste water, precipitating phenol and removing nitrite can be simultaneously realized; the neutralized waste water passes through a fixed bed adsorption column filled with adsorption resin, so that residual phenol in the waste water can absorb on the resin column. Resin after adsorption saturation is carried out with desorption and regeneration by using a NaOH solution and then the resin is repeatedly usable, and the desorption liquid passes through the processes of acidity adjusting and vacuum distillation of phenol to realize recycling of phenol. According to the condensation mother liquid waste water which is pretreated in the disperse blue 56 production process, CODCr value is decreased from about 55000mg/L to less than 500mg/L, the phenols substance concentration is decreased from about 19000mg/L to less than 20mg/L, the nitrite ion is decreased from 87000mg/L to less than 20mg/L; thereby the treatment and resource utilization of waste water can be effectively realized.

The invention discloses an absorbent for circularly absorbing sulfur dioxide gas in tail gas of natural gas and an application of the absorbent. The absorbent comprises the following components in percentage by mass: 30-60wt% of cyclic tertiary amine compounds, 5-10wt% of a desulfurization fortifier, 10-30wt% of a latent solvent, 0.5-3wt% of an activating agent, 1-2wt% of an antioxidant, 0.5-2wt% of a corrosion inhibitor and the balance of water. The application refers to applying the absorbent to removal of the sulfur dioxide gas in the tail gas of the natural gas at an absorption temperature of 20-70 DEG C. According to the invention, by utilizing the structure characteristics of the cyclic tertiary amine compounds which are high in sulfur dioxide absorption capacity and low in desorption energy consumption, and adding corresponding auxiliary agents at the same time, the absorption of absorption liquid to sulfur dioxide has high efficiency and specificity; and the absorbent can selectively remove SO2 from the tail gas of the natural gas, so as to greatly reduce the gas purification cost, and facilitate follow-up utilization of recycled acid gas.

The invention discloses a pressure swing adsorption (PSA) process for multiple placing sequentially and washing alternatively. At least four regulating valves alternately distributed are arranged on each outlet line on the top of an adsorption tower; two or more sequencing valves as a sequential outlet valves and washing outlet valves are arranged on each adsorption tower at the top of the adsorption tower and the sequential placing and the process of washing can be regulated so as to realize the sequential placing procedures of three times or more sequences and the alternative washing procedures of the corresponding times reversed sequences.. The pressure swing adsorption (PSA) process of the invention increases regeneration time, improves the desorption efficiency of impurity components, reduces the consumption of washing gas and increases the rate of products gas collecting; the cycle per minute time of the adsorption is reduced, which can reduce the investment of the equipment and occupation areas. while the performance difference arisen by adopting different control valves in the sequential placing and washing procedures in different adsorption towers is avoided, thus leading the sequential placing and washing procedures of each adsorption tower are completely identical and avoiding reducing the regeneration effect of the whole equipment due to the performance difference of the control valves, thereby avoiding reducing the whole operation performance of the equipment.

The invention discloses a method for adsorbing and separating squalene from vegetable oil deodorized distillate. According to the method for adsorbing and separating the squalene from the vegetable oil deodorized distillate provided by the invention, D101 type macroporous resin is used as an adsorbent. According to the method, an adsorbing material is directly thrown into a solution containing the squalene, and an efficient adsorption process can be completed at normal temperature. According to the method, organic solvents such as n-hexane are used for desorption, the desorption efficiency is extremely high, and the squalene can be efficiently purified. The adopted adsorbing materials do not dissolve in acid, alkali and the organic solvents, are excellent in mechanic strength, can be used repeatedly, is simple in regeneration technology, and low in reclamation cost. The adopted adsorbing materials statically and dynamically adsorb the squalene in the vegetable oil deodorized distillate at normal temperature, are excellent in preferential adsorption and desorption effects, and basically has no change in adsorbing capacity when being reused after desorption activation.

The invention discloses an advanced treatment method for biochemical tail water of leachate of municipal household waste. Tail water mainly comes from biochemical effluent from a treatment device of the leachate of the municipal household waste or effluent of simply chemical-physical treated biochemical effluent. The steps of the method are as follows: at normal temperature and under the condition of 0.5 BV/h to10BV/h of flow, pretreated tail water is absorbed by a device filled with adsorbent resins with complex functions or macroporous resin to yield water, so as to be discharged by reaching the mark; the resin is desorbed and regenerated by sodium hydroxide solution, the flow of desorbing agent is 0.5BV/h to 3.0BV/h, desorbing liquid with high concentration is burnt or disposed by other safe disposal methods, and desorbing liquid with low concentration can be used for preparing the next batch of desorbing agent for circular application. The method of the invention can reduce the COD of the tail water to below 100mg/L from about 150mg/L to 500mg/L and can reduce the ion concentration of ammonia nitrogen, total nitrogen and heavy metal to be below first-grade state emission standard. The method of the invention has the advantages of simple technique and large treatment amount, which can make up the shortcomings of the existing treatment technology of leachate of municipal household waste.

The invention discloses an industrial quick flue gas desulfurizing agent. The industrial quick flue gas desulfurizing agent is prepared from the following raw materials in parts by weight: 100 to 110 parts of bamboo charcoal, 30 to 35 percent of calcium oxide, 10 to 12 parts of ferric oxide, 20 to 23 parts of copper oxide, 10 to 12 parts of silicon dioxide, 20 to 24 parts of alum, 2 to 3 parts of vanadium pentoxide, 10 to 12 parts of hibiscus syriacus, 70 to 80 parts of diatomite, 20 to 24 parts of honeysuckle, 12 to 15 parts of fructus forsythiae, 30 to 35 parts of wild chrysanthemum flower, 3 to 4 parts of lignin, 10 to 12 parts of simethicone, 1 to 2 parts of rosin-polyethylene oxide ester, 4 to 5 parts of assistant agent and a suitable amount of water. The desulfurizing agent disclosed by the invention has a developed pore structure and a large specific surface area, has excellent effects of adsorbing, decoloring, and resisting bacteria, and is favorable for environmental friendliness; desulfurization can be performed quickly by using a plurality of alkali metal oxides. The industrial quick flue gas desulfurizing agent is applicable to desulfurization of boiler gas flue, does not generate secondary pollution, can be desorbed by using ammonia gas, has an obvious effect and high desorption efficiency, and is easy and convenient to use and low in cost.