99results about How to "Adequate mass transfer" patented technology

The invention relates to a method for producing mash gas from municipal sludge through dry method anaerobic fermentation, which belongs to the field of solid waste reclamation, and can overcome the difficulties difficult mass transfer, difficult gas overflow and the like caused by dewatered sludge which has high viscosity, no fluidity, no gaps and the like. The method comprises the following steps of: performing biological pre-drying on the dewatered sludge, and stacking the dewatered sludge in an aerobic environment for 2 to 3 days; adding the material after the biological pre-drying into anaerobic granular sludge or biogas residues to perform inoculation, and performing static starting for 6 to 8 days; performing acidogenic fermentation on the material under an aerobic or anaerobic condition, performing spiral band type or anchor type stirring, and adjusting the pH if necessary; performing methanogenesis fermentation on the material after acid production under an anaerobic condition, performing extruding type stirring, keeping the temperature of the material to be 35+/-1 DEG C, and keeping the pH between 6.6 and 7.5; and performing refluxing inoculation on part of the biogas residues, and performing aerobic compost stabilization on the rest of the biogas residues. The method can be used for beneficial utilization of the municipal sludge and the recovery of biomass energy sources, and compared with wet fermentation, the method can save equipment investment and land occupation.

The invention relates to the technical field of environment protection and cyclic economy, in particular to a using method of a reactivation drying rotary furnace for preparing activated clay. The method is characterized by including the using methods of the reactivation drying rotary furnace, a carrier roller assembly, a driving gear assembly, a screw feeder and a screw discharger. H+ electronegativity and crystal water of the activated clay are protected against destroy, and therefore quality of the activated clay is improved. A reactivation drying rotary furnace body is a closed production device, it is avoided that irritant gas is generated in a working space to become hazard factors of an occupational disease, and pollution to air environment is avoided.

The invention discloses an efficient anaerobic bioreactor, which comprises a reactor, a water sealing tank and an exhaust pipe, wherein a mud-water mixing region, a suspension region, a three-phase separation region, a precipitation region and an air chamber are formed inside the reactor body from bottom to top; the mud-water mixing region, the suspension region, the three-phase separation regionand the precipitation region are communicated in sequence; the outer side wall of the reactor body is connected with a water inlet pipe, a water outlet pipe and a mud discharge pipe; the water inlet pipe is communicated with the mud-water mixing region; the water outlet pipe is communicated with the precipitation region; the mud discharge pipe is communicated with the suspension region; the watersealing tank is arranged at the top end of the reactor body, and is communicated with the air chamber; a three-phase separator connected with the exhaust pipe is arranged in the three-phase separation region; and the three-phase separator is communicated with the water sealing tank through the exhaust pipe. Partitioned treatment is performed during decomposition of organic matters in waste water,so that the function of each functional region is enhanced, and the reactor has high treatment efficiency, is convenient to operate, and runs stably.

The invention relates to a composite type multilayer spiral vibrating countercurrent drying machine. The composite type multilayer spiral vibrating countercurrent drying machine comprises a pluralityof drying discs, and the multiple drying discs are arranged in a stacked mode to form a drying box body; the drying box body is mounted on a base, a vibrating motor is mounted in the base, and the drying discs comprise boxes, heat preservation layers, screening plates, spiral sheets, material falling openings and material falling grooves; the drying disc on the top layer is provided with a feedingcabin and an air outlet, the air outlet is provided with a temperature sensor, and an automatic feeding device is mounted on the feeding cabin; the drying disc on the bottom layer is provided with anair inlet, the air inlet is connected with an air inlet tube, and a temperature sensor is arranged in the air inlet tube; and the drying disc on the bottom layer is further provided with a discharging cabin, the air inlet tube is connected with air inlet equipment, and the air inlet equipment comprises a blower, a heater and an air filter, wherein the blower, the heater and the air filter are arranged sequentially in the flow direction of air. According to the composite type multilayer spiral vibrating countercurrent drying machine, materials and hot air flow in the reverse direction, the heat efficiency is extremely high, the drying efficiency is improved, and the problem that the materials are accumulated and thus difficult to clean is solved.

The invention discloses a new preparing method of allyl alcohol random polyether glycidyl ether. The preparing method comprises the steps of adding an allyl alcohol random polyether raw material in a jet loop reactor based on a venturi effect through a feed inlet of materials, conducting deoxygenization and pumping into inert gases to be subjected to replacement protection, and opening an external circulating pump to be subjected to high speed spraying mixture; controlling the temperature at 30-120 DEG C, slowly adding an epoxy chloropropane raw material and an alkali raw material into the jet loop reactor through the feed inlet of epoxy chloropropane and the feed inlet of the material respectively, and the like. Due to the fact that the system belongs to a system of kinetic control, and a side reaction is inhibited sufficiently, thus the selectivity of a reaction system is higher. The new preparing method is especially applicable to allyl alcohol random polyether of which molecular tail end is secondary hydroxyl, the color luster of the finally obtained product, namely, the allyl alcohol random polyether glycidyl ether product, is less than 40, and the stop end rate of the product is more than 96%.

An application of power wave washer in absorbing CO2 from the tail gas generated by ammona-acid method is disclosed. In said power wave washer, the fume containing CO2 flows downward and the circulating liquid is prayed up ward. They are collided to generate a foam region, wheremore than 95% of CO2 in absorbed by said circulating liquid.

The invention provides a plasma waste gas treatment device and method, and belongs to the technical field of waste gas treatment.The plasma waste gas treatment device comprises a thermal reaction system, an air inlet system, a cooling system, a multistage purification washing system, an exhaust system and a liquid circulating system, and the structureis compact, safe and reliable.The plasma wastegas treatment method comprises the following steps of: carrying out high-temperature cracking reaction after waste gas to be treated enters into the thermal reaction system through the air inlet system, and carrying out quenching and preliminary purification after entering the cooling system; carrying out washing and purification for a plurality of times after entering the multistage washing system; finally discharging the waste gas from a chimney through a dehydration layer under the action of an induced draft fan.The waste gas is subjected to high-temperature cracking, cooling, preliminary purification and multistage purification, so that the purification speed is obviously improved; and the waste gas which can be treated by the method comprises perfluorides, inflammable substances, corrosion, poisons and the like, the purification is thorough, the method is safe and reliable.

The invention provides a method for improving the fermentation capability of a slurry dry process, belonging to the field of solid waste recycling, which can be used for solving the problems that reacted intermediate products and energy are difficult to transmit and diffuse in a medium resulted from the large viscosity of reaction matrix and high total solid (TS) concentration; slow hydrolysis acidification and low aerogenesis speed are caused by that a large amount of substances difficult to degrade exist in slurry and the further biotransformation is limited by the microbial residue cell-wall structure. In the method, dewatered slurry is placed in microwave of which the frequency is 915MHz and the power is 10-60kW for carrying out pretreatment for 3-10 minutes; the pretreated dewatered slurry is cooled to the selected fermentation temperature, and then mixes with seed slurry uniformly based on the mass ratio of 5: 1-3:1 to obtain a mixture which is placed in an anaerobic fermentation tank for standing for 3-5 days in a sealing and non-stirring state; a stirring motor is started, and the stirring speed is controlled to 10-30r/min; and materials are fed and discharged continuously so as to ensure the materials to stay in the anaerobic fermentation tank for 40-60 days. The method for improving the fermentation capability of the slurry dry process can be used to reduce the slurry viscosity and improve the dry fermentation rate and gas production rate; and in addition, the method for improving the fermentation capability of the slurry dry process can be used to save equipment investment and land occupancy compared with the wet fermentation.

The invention discloses a process and a device for producing a (NH4)2SO4 fertilizer by using an ammonium sulfite solution. In an ammonia-process flue gas desulfurization device, by using the ammoniumsulfite solution (NH4)2SO3 produced after ammonia absorbs SO2, the outlet of a liquid inlet ejector (9) is led into the solution at the middle lower part of an oxidation tank (2) by a downcomer through a oxidization preparation process of (NH4)2SO4 fertilizer by self-absorption of air so as to increase the reaction time; and the medium is fully oxidized through the three-stage cyclic oxidation. The cyclic oxidation procedure comprises liquid at the lower part of the oxidation tank (2), a recycle pump (4), a recycle liquid ejector and the middle lower part of the oxidation tank. Air is absorbedin the liquid inlet ejector, and sheared by liquid flows and dispersed into tiny air particles, so that the contact specific area of the gas and the liquid is increased by tens of times compared withthe bubbling oxidization, thereby fully utilizing the oxygen in the air. Therefore, the process enhances the reaction efficiency, shortens the reaction times and increases the conversion rate.

The invention discloses a rotary bed. The rotary bed comprises a cylinder, a bed layer assembly, an upper head and a lower head. A spiral plate is fixed to the inner wall of the cylinder. The spiral plate and a bed layer are in a clearance fit. The bed layer assembly is an integrated structure formed by an upper cover plate, the bed layer, a lower cover plate and a rotating shaft. The upper cover plate and the lower cover plate are respectively fixed to the upper part and the lower part of the rotating shaft. The bed layer is sandwiched between the upper cover plate and the lower cover plate. The lower cover plate is provided with a through hole. The part of the rotating shaft in the bed layer and the part of the rotating shaft above the bed layer are hollow tubular structures. The tube wall of the rotating shaft, in the bed layer, is provided with a plurality of through holes, namely, the part of the rotating shaft is also a liquid distributing tube. The invention relates to a recovery method of hydrocarbon-containing exhaust gas. Crude diesel or crude kerosene is pretreated by utilization of the rotary bed. Materials discharged from a liquid phase outlet of the rotary bed are adopted as an absorbent and used for adsorption treatment of the hydrocarbon-containing exhaust gas. The recovery method is simple in process, economic, reasonable, and free of secondary pollution, and is suitable for adsorption recovery processes of the hydrocarbon-containing exhaust gas.

The invention discloses a device and a method for removing methanol from a methyl tert-butyl ether cracking product. The MTBE cracking product and absorption liquid undergo cross flow-counterflow contact in a multistage airflow shear cross-flow bed; under the shear action of high-speed rotating filler, cracked gas and the absorption liquid are dispersed, coalesced and redispersed for multiple times, so that multistage absorption is realized; cracking gas is introduced to a gas inlet in the side bottom of a multistage airflow shear cross flow bed; a gas outlet in the top of the multistage airflow shear cross flow bed is connected with a purified gas section; the absorption liquid is introduced to a liquid inlet in the side top of the multistage airflow shear cross flow bed; a liquid outletin the bottom of the multistage airflow shear cross flow bed is used for draining the absorption liquid; the liquid inlet is connected with a pump; the liquid outlet of the multistage airflow shear cross flow bed is connected with a liquid-rich tank; the multistage airflow shear cross flow bed comprises a liquid distributor, a liquid collecting and redistributing device, a rotor, a stator, a driving device and a casing. According to the equipment, the gas and the absorption liquid generally make counterflow contact, so that a gas-liquid mass transfer propulsion force is greater, the purification degree of the cracking gas is improved, and the concentration of methanol in the rich solution and the utilization rate of the absorption liquid are improved.

The present invention relates to a novel wet type oily fume purifier. The purifier comprises a housing, a circulation water tank, an oily fume inlet port, an oily fume discharge port, an air exhaust fan, a rectification section, a purification section, a spraying section and a demisting section. The top of the housing is provided with the oily fume discharge port while being in communication with the interior of the housing. The air exhaust fan is connected with the oily fume discharge port. The air exhaust fan provides the negative-pressure power for the oily fume discharge port. The bottom of the housing is provided with the circulation water tank. Above the circulation water tank, the housing is provided with the oily fume inlet port in communication with the interior of the housing. Between the oily fume discharge port and the oily fume inlet port, the rectification section, the purification section, the spraying section and the demisting section are sequentially and coaxially arranged from bottom to top inside the housing. The purification section, the spraying section and the demisting section are arranged at intervals. According to the invention, the removal efficiency of the purifier for oily fume particles with the diameters thereof larger than 2 mum is up to over 90%. Therefore, the purifier is high in oily fume purification efficiency and low in cost. The defect in the prior art that the filter section of a conventional filtration type purifier is frequently cleaned to be easily blocked in the prior art can be overcome.

The invention discloses a rotary bed. The rotary bed comprises a cylinder, a bed layer assembly, an upper head and a lower head. A gas-phase outlet is disposed in the lower part of the cylinder and a liquid phase outlet is disposed in the lower head. A spiral plate is fixed to the inner wall of the cylinder. The spiral plate and a bed layer are in a clearance fit. The bed layer assembly is an integrated structure formed by an upper cover plate, the bed layer and a lower cover plate. The upper end of the bed layer assembly is fixed in a rotatable manner to the upper part in the cylinder through a support. The bed layer is sandwiched between the upper cover plate and the lower cover plate. The middle part of the bed layer is a cylindrical cavity. A liquid distributing tube stretches from the upside into the cylindrical cavity in the middle part of the bed layer. The invention relates to a recovery method of hydrocarbon-containing exhaust gas. Crude diesel or crude kerosene is pretreated by utilization of the rotary bed. Materials discharged from the liquid phase outlet of the rotary bed are adopted as an absorbent and used for adsorption treatment of the hydrocarbon-containing exhaust gas. The recovery method is simple in process, economic, reasonable and free of secondary pollution, and is suitable for adsorption recovery processes of the hydrocarbon-containing exhaust gas.

The invention relates to a method for extracting rare earth elements and a rare earth extraction system. The method comprises the following steps: inputting quantitative water solution or suspension, as heavy liquid, of rare earth elements into an extraction tank via a heavy liquid inlet at the top of the extraction tank; starting a stirring shaft; filling an extraction solvent as light liquid into the extraction tank uniformly from a liquid distributor at the bottom of the extraction tank, ensuring step-by-step mixing and mass transfer from bottom to top between the light liquid and the heavy liquid in the stirring process and enabling the light phase liquid completing mass transfer to overflow into a decanting tank from the top of the extraction tank; after the light phase liquid is decanted in the decanting tank, discharging the light components via a light liquid outlet at the top of the decanting tank; judging whether extraction is completed by detecting the concentrations of the needed rare earth elements in the light component solution discharged from the decanting tank; after extraction is completed, stopping input of the light liquid and starting an emptying valve below the decanting tank to empty the decanting tank; and discharging the heavy liquid in the extraction tank via a heavy liquid outlet at the bottom of the extraction tank.

The invention discloses a reaction kettle which comprises a kettle body, wherein a material inlet is formed in the top of the kettle body; a material outlet is formed in the bottom of the kettle body; the kettle body comprises an inner layer and an outer layer; a heat preservation layer is arranged at the outer side of the outer layer; a temperature detection device is arranged at the lower side wall of the kettle body; a bearing in the top of the kettle body is in tight connection with a stirring shaft; a motor and a speed reducing machine are arranged above the stirring shaft; the stirring shaft positioned at the lower part of the kettle body is connected with a stirring device blew the stirring shaft. The reaction kettle can be used for improving the heat exchange efficiency, and the heating temperature is easy to control; the whole kettle body is heated, so that liquid materials can be uniformly heated; the stirring effect is good, and the flowing directions of the materials are changed in a stirring process, so that the reaction of the materials is relatively full; an air valve is adopted for controlling the output of gas generated in a reaction process; parameters such as the temperature, air pressure and stirring speed can be controlled; a temperature sensor in a feeding device can effectively sense the temperature of the materials.

The invention relates to the technical field of fluorine chemicals and in particular relates to an anhydrous hydrogen fluoride preparation process. The process is characterized by comprising the following steps: circulating fluidized bed reaction, granular moving bed filtration, washing and condensing, circulating fluidized bed distillation, circulating fluidized bed degassing and environmental-friendly tail gas treatment.

The invention discloses a device and method for desulfurizing waste gas of a ship engine.Seawater or fresh water and alkaline substances are used as an absorbent, and wastewater of a secondary desulfurization technology combining a primary washer and a main tower can be directly discharged into the ocean after treatment; the device comprises a flue gas system, a desulfurization system, a seawatersupply system, a wastewater treatment system and a control system, wherein the flue gas system comprises a booster fan and a connecting pipeline; waste gas from an engine chimney outlet is supercharged by a supercharged fan and then enters a desulfurization tower; the desulfurization system comprises the desulfurization tower, a circulating pump, a flow meter, and a circulating water tank; the seawater supply system comprises a filter, a seawater detector 1 and a seawater pump; the wastewater treatment system comprises a replacement pump, an aeration tank, an aeration fan, an exhaust pump, a rotary vacuum filter, a sludge tank, a seawater detector 2. The device and methodachieve the combination of dual-mode and two-stage desulfurization, thetechnological process is simple, the system adjustability is high and the operation cost is low, the device and methodare suitable for desulfurizing waste gas of the ship engine.

The invention discloses a tubular photo-biological reactor CO2 refining device. The tubular photo-biological reactor CO2 refining device mainly comprises a filter device, a liquid valve, a liquid flowmeter, a gas valve, a gas flowmeter, a gas-liquid mixed tee, an axial flow and radial flow composite labyrinth screw pump, a microbubble liquid valve and a microbubble liquid tee, wherein the axial flow and radial flow composite labyrinth screw pump comprises a pump inlet, a stator, a rotor, a fixed disc, a refining disc, a volute and a pump outlet. The rotor and the stator form an axial flow working cavity, and the fixed disc and the refining disc form a radial flow working cavity. According to the axial flow and radial flow composite labyrinth screw pump CO2 refining device disclosed by the invention, CO2 gas can be pumped into a tubular photo-biological reactor in a micron-order scale, the problems that the requirment on installation accuracy of the rotor and the stator is high is avoided, the bubble refining effect is good through two-stage refining of gas, the residence time of microbubbles in pipelines is long, the microbubbles are unlikely to float to the top of a pipe quickly, gas-liquid two-phase mass transfer and mixing are more sufficient, and the absorption of microalgae for CO2 is more thorough, so that photosynthesis is carried out preferably.

The invention discloses a novel method for terminating allyl alcohol irregular polyether methyl. The novel method comprises the following steps of: adding allyl alcohol irregular polyether raw materials through a material inlet in a jetting loop reactor based on Venturi effect, deoxidizing and introducing inert gases for replacement and protection, and starting an external circulating pump to carry out high-speed jetting mixing; and at a control temperature ranging from 20 DEG C to 70 DEG C, slowly adding a methane chloride raw material and an alkali raw material into the jetting loop reactor through a methane chloride raw material feeding hole and a material feeding hole separately, and the like. According to the novel method disclosed by the invention, this system belongs to a dynamic control system, side reactions are restrained sufficiently, a low-temperature method is further adopted to carry out dynamic reaction control according to the characteristic that activation energy of side reactions is high, hydrolysis reaction of methane chloride is restrained, and isomerization reaction of allyl is further restrained, and therefore, selectivity of a reaction system is higher. Finally obtained allyl alcohol irregular polyether methyl terminated product has color and luster smaller than 30, and has a terminating rate greater than 98%.

The invention provides a composite photocatalytic material and a preparation method and application thereof, and relates to the field of water treatment. The composite photocatalytic material comprises foamy carbon, a metal oxide nano array and noble metal nano particles. A metal oxide nano array is grown on a foamy carbon substrate in situ through an impregnation method-hydrothermal method, and then noble metal nanoparticles are loaded on the metal oxide nano array through a chemical reduction method, so that the three-dimensional porous hierarchical structure composite photocatalytic material with high specific surface area, moderate pore structure and rich active sites is formed. The material is used for carrying out photocatalytic oxidation treatment on heavily-polluted wastewater containing high-valence heavy metals and organic pollutants, the high-valence heavy metals and organic matters can be removed at the same time, the operation process is simple, the material price is low, other sacrificial agents do not need to be added, the treatment cost is low, the catalytic performance is relatively high, and the stability is good; the material can be applied to advanced treatment engineering of high-valence heavy metal and organic matter combined pollution in drinking water, industrial wastewater and natural water.

The invention relates to the technical field of biological sewage treatment, in particular to a low-concentration village and town sewage treatment method. The low-concentration village and town sewage treatment method provided by the invention comprises the following steps: inoculating flocculent sludge into a reactor, culturing aerobic granular sludge by adopting a sequencing batch operation mode of water feeding, pulse aeration stirring, anaerobic treatment, aerobic treatment, standing, pulse aeration stirring, precipitation and drainage, and purifying low-concentration village and town sewage at the same time. By adopting pulse aeration stirring, sludge and sewage can be fully mixed, the problem of non-uniform water distribution is solved, and a complex water distribution structure anda stirring device or a reflux device are saved, so that the reactor is simple in structure, less in equipment and low in investment and operation cost. Pulse aeration stirring is adopted, it can be guaranteed that sludge is in a suspended state all the time in the stirring process, and it is guaranteed that the good effluent quality of the system is always kept from the granular sludge culture stage to the stable operation stage.

The invention discloses a multifunctional composite type centrifugal vibration adverse-flow solid dryer. The multifunctional composite type centrifugal vibration adverse-flow solid dryer comprises a drying tower and a vibrating platform, wherein the inner part of the drying tower is of a multi-layer structure, a plurality of layers of drying discs are arranged inside the drying tower; a cowl flapand a screen are arranged on the drying disc at each layer, the screen is arranged on the cowl flap, air holes are uniformly distributed in the cowl flap, air caps for changing outlet air of the air holes into the horizontal direction from the vertical direction are arranged on the air holes, the edge of the cowl flap and the edge of the screen are equipped with dropping holes, and dropping mechanisms are arranged in the dropping holes; the drying tower is mounted on the vibrating platform, an air inlet of the drying tower is connected to an air inlet tube, and then is connected to an air inlet end filter device, an air valve is arranged on the air inlet tube, the air inlet end filter device is connected to an air inlet mechanism, an air outlet of the drying tower is connected to a dust collector, and the dust collector is connected to an induced draft fan. The multifunctional composite type centrifugal vibration adverse-flow solid dryer disclosed by the invention protects the screen through the cowl flap, facilitates air introduction, boils and dries through cooperative action of vibration and hot air to realize drying of particle materials, powdered materials, blocked materials and spherical materials.