35results about How to "Improve gas-liquid mass transfer efficiency" patented technology

The invention discloses a chelated iron desulfurizer and application method thereof, and belongs to the technical field of gas purification. The chelated iron desulfurizer comprises the following components: soluble iron salt, an iron salt chelating agent, a sulfide absorbent, a stabilizing agent, a composite particle settling agent, and a multifunctional corrosion inhibitor; wherein the mole ratio of Fe<3+> to Fe<2+> in soluble iron salts is 1:3-5:1; the mole ratio of chelating agent to iron salts is 1.2:1-3:1, and the pH value of the solution is 8.0 to 9.5. The chelated iron desulfurizer is used to remove sulfur under the assistance of a hyper-gravity technology; the desulfurization efficiency is high, the work sulfur capacity is high, the performance of the desulfurizer is stable, and the oxidation regeneration performance is good. The hyper-gravity chelated iron desulfurization technology has the advantages that the technology is simple, the mass transfer efficiency between gas and liquid is high, the equipment is small and can be easily assembled or disassembled, and the technology can be used to remove H2S from natural gas or associated gas in an offshore oil and gas platform.

The invention relates to a microporous gas distributor, which comprises a shell (1), wherein the shell (1) is provided with a gas inlet (5), a liquid inlet (6) and a liquid outlet (7); a ceramic membrane element (2) is arranged in the shell (1), one end of the ceramic membrane element (2) is opened, the other end of the ceramic membrane element (2) is sealed with epoxy resin, and the opening ends of the gas inlet (5) and the ceramic membrane element (2) are communicated. According to the invention, by the micropore properties of membrane material, gas enters from the opening end of the ceramic membrane element and is discharged from the micropores of a side wall so as to make bubbles fine and uniform, and liquid moves from the liquid inlet to the liquid outlet so as to make the bubbles diffused in the ceramic membrane element fully contacted with the liquid in the shell. The gas and liquid mass transfer efficiency is improved, a ceramic membrane has the characteristics of high temperature resistance, high pressure resistance, acid-base resistance and the like and can be used for a long time in various solutions, the continuous operation time is long, the operation is stable, and the operation cost is reduced.

The invention discloses a long-paddle short-blade composite stirrer. The long-paddle short-blade composite stirrer comprises a fixed plate (1), a group of long paddles (2), a connection plate (3) and a group of short blades (4), wherein upper ends of the long paddles (2) are fixed on the fixed plate (1); lower ends of the long paddles are fixed on the top of the connection plate (3); the short blades (4) are fixed at the bottom of the connection plate (3). The stirrer is simple in structure, has surface self-inspiration function and is capable of greatly improving gas-liquid mass transfer efficiency, has good operation flexibility, is applicable to mixing process of liquid with different viscosities or gas-liquid and gas-liquid-solid multiphase dispersion process and also applicable to single-phase mixing process or multiphase dispersion process with continuous change of liquid level.

The invention discloses a method for culturing full autotrophic denitrification granular sludge in a continuous flow reactor, and belongs to the field of wastewater autotrophic denitrification. The method comprises the following steps of: firstly, inoculating a CANON biological membrane in the continuous flow reactor; directly beginning to carry out a full autotrophic denitrification process under an oxygen limitation condition to culture the full autotrophic denitrification granular sludge. The full autotrophic denitrification granular sludge process is started under a low-load condition at first, and then the inoculated sludge continuously adapts to the reaction condition in the continuous flow reactor, so that the processing ability of the continuous flow reactor is continuously improved; in a high-load culturing stage, the water inflowing load is improved by utilizing means of keeping the ammonia-nitrogen concentration of inflowing water invariable and shortening hydraulic retention time to continuously culture granular sludge. Because strong flow shear stress acts upon the continuous flow reactor, the granulation process of the full autotrophic denitrification sludge is promoted, and the structure of the granular sludge formed in the continuous flow reactor is relatively stable.

The invention discloses a method for preparing a polyurethane curing agent. The method comprises the following steps of: firstly, evaporating a curing agent obtained by polymerizing an isocyanate monomer through an external cold type film evaporator to remove part of free isocyanate monomer; and secondly, separating heavy components separated by the external cold type film evaporator through a high-speed rotary bed to obtain a product with lower free monomer content, wherein the content of the free isocyanate monomer is 0.05-0.6 percent by weight. The method disclosed by the invention has theadvantages of small size of equipment, high separation speed, high quality of products, high recovery rate of the monomer, capability of meeting the requirements of environmental friendliness, relatively low requirement on filed and little investment. According to the method, the content of the free isocyanate monomer in the polyurethane curing agent is reduced without remarkably increasing the relative molecular weight and molecular weight distribution of polyisocyanates and the downstream application is facilitated.

The invention discloses a twin exhaust gas purifying tower, which comprises towers I and II and tower circulating pools I and II, wherein the towers I and II are paratactic and serially connected with each other; the circulating pools of the tower I and II are corresponding to the lower parts of the towers I and II; a liquid gathering hopper, a liquid-guiding ring, a nozzle, a spiral flow plate and a top liquid baffle ring are arranged in the tower I from bottom to top; an exhaust gas inlet and an air oxidation device are arranged on the tower I circulating pool; a tower II liquid distributing pipe, a conical cup atomizing layer and a multi-ring whirlwind demister are arranged on the tower II from top to bottom; a clean gas outlet is arranged on the tower II; spacing rings are arranged onthe circulating pools on the lower parts of the towers I and II; circulating pumps are arranged in the circulating pools of the tower I and II; lifting pumps and dewatering pumps are arranged at bottoms of the towers I and II; and a medium conveying pipe is arranged on the upper part of the tower II. By using the twin exhaust gas purifying tower, a gas / liquid mass transfer area is increased, a gas / liquid contact area is updated by repeatedly cutting, the purifying efficiency is high, the consumption of circulating kinetic energy is reduced, the flow speed of idle tower is increased, the reaction of absorbing medium is more complete, the utilization ratio is higher, solid content in cleaning solution in the towers is reduced, the abrasions of the circulating pumps and the nozzle are reduced, the service life is prolonged, and the maintenance is more convenient. The twin exhaust gas purifying tower is mainly used for cleaning, absorbing and purifying the exhaust gas.

The invention discloses a method and a device for absorbing and purifying harmful gas through electrochemical oxidation. The method is characterized by comprising the following steps of: sucking harmful gas to be treated through a water jet vacuum device, mixing the harmful gas and absorption liquid, and introducing the mixture into an absorption tower; absorbing and degrading the harmful gas by the absorption liquid in the absorption tower, discharging the purified gas from a gas outlet on the lower part of the absorption tower, pressurizing the absorption liquid with saturation of absorption through a pressure pump, and introducing the absorption liquid into an electrochemical reactor; carrying out an electrochemical redox reaction in the electrochemical reactor, so that the absorbed harmful gas in the absorption liquid is degraded; and depressurizing the absorption liquid through the water jet vacuum device, mixing the absorption liquid and the harmful gas which is sucked by the water jet vacuum device, introducing the mixture into the absorption tower for absorption, and recycling the absorption liquid. The method has the advantages of high removal efficiency, low operating cost, low using cost and the like.

The invention discloses a method for continuously and efficiently preparing 2, 6, 6-trimethyl-2-cyclohexene-1, 4-diketone by oxidation. The method includes the steps: (1) performing reaction of raw material liquid and oxygen-containing gas in a spraying and mixing manner to obtain reaction liquid; (2) performing gas-liquid separation on the reaction liquid, adjusting temperature of a liquid phase,and performing reaction of the liquid phase and the oxygen-containing gas in a spraying and mixing manner to obtain reaction liquid; (3) repeating process of the step (2) until reaction is complete to obtain 2, 6, 6-trimethyl-2-cyclohexene-1, 4-diketone liquid. The oxygen-containing gas in the step (2) is a gas phase acquired by gas-liquid separation or newly prepared gas. The raw material liquidcomprises a catalyst, a reaction raw material and a solvent. By the aid of a gas and liquid mixing and spraying mode, the mixing effect of the reaction liquid, the gas and the catalyst is greatly superior to that of a mechanically stirred reactor, bubbles are more uniformly dispersed and sufficiently contact, ideal mass transfer effects are achieved, and reaction is accelerated.

The invention relates to the technical field of sewage treatment and discloses a corona plasma activation method capable of improving the mass transfer efficiency of ozone micro bubbles in a water body. The corona plasma activation method capable of improving the mass transfer efficiency of the ozone micro bubbles in the water body is characterized by comprising the following steps: a) filling gas into the water body to obtain a mixture of the water body and the gas; b) stirring and shearing the mixture obtained in the previous step, so that bubbles are crushed, and the diameter of each bubble is reduced; c) enabling the bubbles obtained in the previous step to generate corona so as to generate the ozone micro bubbles; d) dissolving the ozone micro bubbles into the water body, removing pollutants in the water body, crushing the bubbles in a water and gas mixture before corona to reduce the diameter of each bubble, so that the gas and liquid mass transfer efficiency and the water solubility of the ozone micro bubbles generated during ozonization are improved, further the disinfection efficiency of ozone is improved, and therefore, the water quality is better changed.

An exhaust gas recirculating device for a marine diesel engine comprises a dynamic wave washer. By means of the characteristics of efficient washing and high heat exchanging coefficients of the dynamic wave washer, particular matter and sulfur dioxide in exhaust gas are removed, the exhaust gas is cooled to a certain degree, and the washed exhaust gas is subjected to further cooling of an air cooler, dewatering of a drip separator and pressurizing of an air blower, enters a scavenging header and a combustor to take part in combustion. By means of the exhaust gas recirculating device for the marine diesel engine, efficient washing of the circular exhaust gas can be achieved; compared with existing EGR washing equipment, the structure is greatly simplified, and the initial investment and therunning cost of EGR are reduced; and great potential is provided for following upgrading and improving of the EGR device.

The invention relates to a device for indirect catalytic oxidation of diesel vehicle tail gas pollutants by air micro-nano bubbles. The device comprises: an air collecting bag (8) is connected with amicro-nano bubble generator (2); the upper portion of the micro-nano bubble generator (2) is connected with the upper portion of a reaction tower (5) through a glass tank (3), the lower portion of themicro-nano bubble generator (2) is connected with the lower portion of a reaction tower (5), the top end of the reaction tower (5) is connected with a glass tank (3), and the bottom end of the reaction tower (5) is connected with a diesel vehicle tail gas collecting bag (7). The device is simple in composition, low in energy consumption, easy to operate, capable of improving the gas treatment capacity and more suitable for diesel vehicle tail gas treatment.

The invention discloses a reaction packed tower for methane chloride production. The reaction packed tower comprises a tower body, the lower part of the tower is provided with a methanol steam and hydrogen chloride inlet, a discharge port and an emptying port, the top of the tower is provided with a reflux inlet, the discharge port is connected with an external reflux pump, the reflux pump circulates the material discharged from the bottom of the tower to the top of the tower for reflux, and the interior of the tower body is divided into an upper section of packing and a lower section of packing. A methanol steam side line feeding hole is additionally formed between the two sections of fillers; and methanol evaporators are arranged on methanol steam feeding lines. The invention also provides a method for synthesizing methane chloride by adopting the device. The gas-liquid mass transfer efficiency can be effectively improved, the generation of byproducts is reduced, the hydrochloric acid conversion rate is improved, the pressure is relieved for subsequent deacidification and drying procedures, the production capacity is high, the operation flexibility is high, and the working performance is good.

The present invention relates to a process for producing C1-C4 alkyl nitrite, comprising loading a resin catalyst layer and / or a porous filler layer into a reactor, passing nitrogen oxide, oxygen and C1-C4 alkanol as raw materials through the resin catalyst layer and / or porous filler layer in a counter current, parallel current or cross current manner, reacting under the conditions including a reaction temperature of from 0 to 150° C., a reaction pressure of from −0.09 to 1.5 MPa, a molar ratio of C1-C4 alkanol / nitrogen oxide of 1-100:1, a molar ratio of nitrogen oxide / oxygen of 4-50:1, to obtain an effluent containing C1-C4 alkyl nitrite, wherein said nitrogen oxide is NO, or a mixed gas containing NO and one or more selected from N2O3 and NO2.

The invention relates to a microporous gas distributor, which comprises a shell (1), wherein the shell (1) is provided with a gas inlet (5), a liquid inlet (6) and a liquid outlet (7); a ceramic membrane element (2) is arranged in the shell (1), one end of the ceramic membrane element (2) is opened, the other end of the ceramic membrane element (2) is sealed with epoxy resin, and the opening ends of the gas inlet (5) and the ceramic membrane element (2) are communicated. According to the invention, by the micropore properties of membrane material, gas enters from the opening end of the ceramic membrane element and is discharged from the micropores of a side wall so as to make bubbles fine and uniform, and liquid moves from the liquid inlet to the liquid outlet so as to make the bubbles diffused in the ceramic membrane element fully contacted with the liquid in the shell. The gas and liquid mass transfer efficiency is improved, a ceramic membrane has the characteristics of high temperature resistance, high pressure resistance, acid-base resistance and the like and can be used for a long time in various solutions, the continuous operation time is long, the operation is stable, and the operation cost is reduced.

The invention discloses a method for preparing cyclohexanone by cyclohexane oxidation. The method involves a device for preparing cyclohexanone by cyclohexane oxidation, and the device for preparing cyclohexanone by cyclohexane oxidation comprises a tubular reactor, an ultrasonic microbubble generator, an air storage tank, a cyclohexane storage tank, a condenser and a gas-liquid separator. The preparation method comprises the following steps: 1, feeding materials into the air storage tank and the cyclohexane storage tank according to a certain proportion, intensively mixing through the ultrasonic microbubble generator to crush gas into microbubbles, feeding the microbubbles into the tubular reactor, cooling the reacted materials through the condenser, and separating through the gas-liquid separator to obtain a cyclohexane oxidation liquid; and 2, carrying out catalytic decomposition on the cyclohexane oxidation liquid obtained in the step 1 under a slightly acidic condition to obtain cyclohexanol and cyclohexanone, and carrying out extractive distillation separation to obtain cyclohexanone. The conversion per pass of cyclohexane and the yield of cyclohexanone are high, and the material consumption and the energy consumption are obviously reduced.

The invention discloses a rotating bed with concentric corrugated rings, and relates to the field of gas-liquid mass transfer equipment. The rotating bed with the concentric corrugated rings mainly comprises a cavity, wherein a rotor is arranged in the cavity, a rotating shaft of the rotor penetrates through a baseboard of the cavity, a liquid inlet pipe penetrates through the cavity and a centralchamber of the rotor from the upper portion of the cavity, the liquid inlet pipe and the rotating shaft are installed coaxially, and a plurality of liquid outlet holes are formed in a pipe wall of the liquid inlet pipe; a gas outlet pipe is arranged on an upper panel of the cavity, and communicates with the central chamber of the rotor; and the rotor is composed of an upper disc and a lower disc,one set of concentric corrugated rings with the diameters evenly increasing are fixed between the upper disc and the lower disc, the concentric corrugated rings are composed of multiple peaks and troughs, and any two of the concentric corrugated rings are distributed in a staggered mode, so that the peaks of each concentric corrugated ring face the corresponding troughs of the corresponding adjacent concentric corrugated rings. The rotating bed with the concentric corrugated rings has the advantages that the rotor of the rotating bed is a rotor with the concentric corrugated rings, and circumferential distribution of liquid can be greatly improved, so that the gas-liquid mass transfer efficiency of the rotating bed is improved.

The invention relates to a device for treating ammonia and nitrogen in wastewater by virtue of reinforcing ammonia distillation. The device comprises two sets of reinforcing ammonia distillation devices, wherein the gas inlet of one set of reinforcing ammonia distillation device is connected with a gas-phase outlet of a reboiler; the gas outlet of the other set of reinforcing ammonia distillation device is connected with the gas outlet of one set of reinforcing ammonia distillation device, liquid outlets of the two sets of devices are connected with a buffer tank by virtue of pipelines, after the reinforcing ammonia distillation devices are started, the steam is introduced and a feed pump is simultaneously started to introduce the wastewater, the wastewater exchanges heat with purified hot wastewater through a heat exchanger, enters the reinforcing devices and is uniformly distributed at an inner diameter of a rotary drum by virtue of a liquid distributor, the wastewater is in full contact with steam in a rotating filler so that ammonia and nitrogen in the wastewater are transferred in steam; and treated steam is discharged from the gas outlet and sent to a next-stage treatment procedure or a next-stage device and the obtained purified wastewater enters the wastewater buffer tank, exchanges heat with raw material wastewater through the heat exchanger and enters a next treatment process. The device has the advantages of small area occupation, short material residence time, small gas-liquid ratio and high treatment accuracy and is easy to operate.

The invention discloses a desulfurization synergistic additive which comprises the following components in parts by weight: 20-35 parts of sodium formate, 15-30 parts of glutaric acid, 10-20 parts of succinic acid, 5-15 parts of sodium acetate, 15-25 parts of adipic acid, 0-20 parts of sodium polycarboxylate, 0-15 parts of 1-hydroxyethylidene-1, 1-diphosphonic acid and 0-5 parts of amorphous iron oxyhydroxide, and the powder of the components is uniformly mixed at normal temperature and normal pressure in a dry state. According to the desulfurization synergistic additive, the solubility of limestone in a liquid phase is improved, the solubility of the limestone is enhanced, the SO2 gas-liquid mass transfer efficiency in the desulfurization reaction process is effectively improved, SO2 absorption is enhanced, the desulfurization reaction speed of the limestone is effectively improved, and the treatment capacity and desulfurization efficiency of a desulfurization system are effectively improved; the cost performance is more prominent, and the long-time safe and stable operation of the desulfurization system is enhanced.

The invention relates to a device and a process applied to reinforced absorption of methyl iodide in acetic acid tail gas. The device comprises two reinforced absorption devices, two stages of absorption liquid pumps, two stages of absorption liquid storage tanks, a demister and an absorption liquid cooler which are connected with one another in series, wherein a gas inlet of a first-stage reinforced absorption device is communicated with an acetic acid tail gas source; a gas outlet of the first-stage reinforced absorption device is communicated with a gas inlet of a second-stage reinforced absorption device; a liquid inlet is communicated with a second-stage absorption liquid storage tank by virtue of a first-stage absorption liquid pump; a liquid outlet is directly communicated with a first-stage absorption liquid storage tank; a gas outlet of the second-stage reinforced absorption device is communicated with an inlet of the demister; a liquid inlet is communicated with a liquid outlet of the absorption liquid cooler by virtue of a second-stage absorption liquid pump; the liquid outlet is directly communicated with a second-stage absorption liquid storage tank; a liquid discharging hole of the demister is communicated with the second-stage absorption liquid storage tank. The device is simple in structure, small in size, easy to operate, low in operation cost and high in production efficiency.