885results about How to "Improve regeneration efficiency" patented technology

An apparatus and a method for recovering CO₂ are provided in which an energy efficiency is improved. The apparatus for recovering CO₂ includes a flow path for returning extracted, temperature risen semi-lean solution into a regeneration tower wherein at least a part of the semi-lean solution obtained by removing a partial CO₂ from a rich solution infused in a regeneration tower from an upper part of the regeneration tower is extracted, raised its temperature by heat exchanging with a high-temperature waste gas in a gas duct of an industrial facility such as a boiler, and then returned into the regeneration tower.

A heat pump system is operable in winter mode and/or summer mode, and may be selectively operated in a defrost mode or cycle. The system includes an energy recovery module that receives and conditions air in a regeneration air channel. A pre-processing module is positioned downstream of the energy recovery module. The pre-processing module receives and heats air from the energy recovery module. A regeneration air heat exchanger is positioned downstream of the pre-processing module. The regeneration air heat exchanger receives and conditions air from the pre-processing module. The pre-processing module heats the air from the energy recovery module to increase efficiency of the regeneration air heat exchanger. During the defrost mode, a loop of regeneration air may be recirculated between the supply air channel and the regeneration air channel in order to defrost the regeneration air heat exchanger.

A method for operating a spark-ignition engine having a three-way catalyst and a particulate filter downstream thereof, comprising: oscillating an exhaust air-fuel ratio entering the particulate filter to generate air-fuel ratio oscillations downstream of the particulate filter, while increasing exhaust temperature; when the downstream oscillations are sufficiently dissipated, enleaning the exhaust air-fuel ratio entering the particulate filter; and reducing the enleanment when an exhaust operating parameter is beyond a threshold amount.

The invention discloses a regeneration method of a lithium extraction system. The lithium extraction system is regenerated by virtue of alkaline saponification and the regeneration method comprises the following steps of mixing empty-loading organic phases subjected to lithium extraction and reverse extraction and alkaline liquor, saponifying and standing for separating phases to obtain a clarified and transparent regenerated and extracted organic phase, wherein the empty-loading organic phases comprise an extractant, a synergistic extractant and a diluent which are involved in the lithium extraction and reverse extraction processes; the synergistic extractant is iron chloride; and the alkaline liquor is any one of sodium hydroxide solution and potassium hydroxide solution. The regeneration method of the lithium extraction system disclosed by the invention has the advantages of simplicity in operation and good saponifying effect; when lithium is extracted by virtue of the saponified, regenerated and recycled extraction organic phase, the extraction efficiency of lithium is high and the extraction effect is good; and by the method, the recycling of the extraction organic phase for extracting lithium is achieved and the process flows of extracting, carrying out reverse extraction, regenerating and extracting for circularly extracting lithium are completed.

A device for utilizing waste heat from a heat engine comprises a Rankine cycle including a pump, a heating device, an expansion device, and a condenser device, and a controller for controlling an operation of the Rankine cycle. The controller calculates an optimum heat collection amount (Qho) as a heat value to be collected from waste heat of the engine, wherein the heat collection amount (Qho) is calculated as an optimum amount in relation to a potential maximum heat radiation amount (Qco) to be radiated at the condenser device. The controller calculates an optimum flow amount (G) of refrigerant corresponding to the optimum heat collection amount (Qho), so that a maximum driving power (L) is generated at the expansion device.

The invention discloses a method for treating sulfur- and hydrocarbon-containing foul waste gas. The waste gas enters a heat exchanger for cooling, condensed water is separated, the cooled waste gas enters an absorption tower to be absorbed by an absorbent distillate, a fresh absorbent exchanges heat with a rich absorbent discharged by the absorption tower and then is cooled by a cooling system, and the cooled absorbent enters the absorption tower; and the waste gas subjected to absorptive purification enters an adsorption tower for adsorptive purification, the adsorption tower is segmentally filled and respectively filled with silica gel adsorbents and activated carbon adsorbents, and heat exchangers are arranged among the adsorbents in each segment. The method can thoroughly purify the sulfur- and hydrocarbon-containing foul waste gas discharged by chemical engineering storage tanks, refining devices and the like, and has the advantages of simple treatment process and no potential safety hazard.

The invention relates to a method for recovering and purifying hydrocarbon wastegas by condensation and adsorption, which comprises the following steps: firstly condensing hydrocarbon wastegas to remove water vapor; and recovering hydrocarbon by further condensation, performing activated carbon adsorption on gases not condensed and adsorbing exhaust by activated carbon, wherein the activated carbon adsorption at least comprises two activated carbon adsorption tanks for the switching operation of adsorption and regeneration, the activated carbon adsorption tanks at least comprise two activated carbon bed layers inside; and during the regeneration operation, the regenerative gas is subjected to at least once vapor heat exchange and temperature rise in the process of passing through the activated carbon bed layer. The method for recovering and purifying the hydrocarbon wastegas by condensation and adsorption has the characteristics of high recovery of hydrocarbon substances, high regeneration efficiency of the activated carbon, high concentration and convenient use of the regenerative gas, and the like, and can be applied to recovery and purification treatment of acid tank exhaust gas, oxidative sweetening tail gas and other hydrocarbon wastegas.

In a cross section perpendicular to a central axis direction of the honeycomb substrate, cells are arranged so that a periphery of an inlet plugged cell is surrounded with four rectangular outlet plugged cells and four square outlet plugged cells, and in the cross section, a partition wall center distance a, a partition wall center distance b and a partition wall thickness t satisfy the following equation (1). Additionally, an amount of a catalyst per unit volume of partition walls which is loaded onto the partition walls defining the rectangular outlet plugged cells and the inlet plugged cells is larger than an amount of a catalyst per unit volume of the partition walls which is loaded onto the partition walls defining the rectangular outlet plugged cells and the square outlet plugged cells.

0.95<b/at<1.90  (1)

The in situ active carbon regenerating method and apparatus with medium blocking discharge plasma belongs to the field of chemical adsorbing separation and pollutant controlling technology. Under atmospheric pressure, low temperature unbalanced plasma generated through medium blocking discharge is used to in situ regenerate active carbon with adsorbate filled between the discharge electrodes under the action of high activity matter, ultraviolet and high energy electron bombardment, etc. The in situ active carbon regenerating apparatus consists of high voltage AC source, reactor and auxiliary device mainly. The present invention has the advantages of high regeneration efficiency, short regeneration period, no secondary pollution, no need of post-treatment, low active carbon loss, etc; and is suitable for active carbon regeneration mainly.

A first exhaust turbo rotary machine is able to assist turbo supercharging by operating as a motor on power generated in a second rotary machine connected to a power axis of an engine. Also, when exhaust energy is large, the first turbo rotary machine operates as a generator so as to make the second rotary machine connected to the engine motive power axis operate electrically, thereby making it possible to add exhaust energy to the engine motive power axis. Consequently, that which results is a compound engine dynamo-electric machine that improves total efficiency of the engine by adding exhaust energy, which is otherwise discarded, to the engine motive power axis. This arrangement increases engine torque in a speed region where exhaust pressure is low by utilizing part of the engine's motive power as a supercharging driving force.

The invention discloses a preparation method of a plant-mixed hot recycled asphalt mixture. The preparation method comprises the following steps: (1) after heating new aggregates, adding the new aggregates into a mixing cylinder; (2) after heating part of new asphalt, adding the heated new asphalt into the mixing cylinder for the product obtained in the step (1) for mixing; (3) after heating RAP (recycled asphalt pavement) materials, adding the RAP materials into the mixing cylinder for the product obtained in the step (2); (4) adding the rest of new asphalt into the mixing cylinder with the product obtained in the step (3) for mixing; (5) adding mineral powder into the mixing cylinder for the product obtained in the step (4) for mixing; and (6) taking the mixture obtained in the step (5) out of the cylinder and carrying out forming. The method disclosed by the invention has the advantages of easy implementation, high recycling efficiency of old materials, small use quantity of the new asphalt, effective prevention from generating grizzled materials in the recycled mixture, higher uniformity of the recycled mixture and better performance.

The invention relates to a road surface construction material, in particular to a plant-mixed warm recycled asphalt mixture and a preparation method thereof. The plant-mixed warm recycled asphalt mixture comprises the following components in percentage by mass: (20-70)% of RAP, (0 to 8)% of new aggregate, (0 to 8)% of limestone mineral powder, (0.5 to 5)% of new asphalt and (0 to 0.5)% of recycling agent, wherein the total mass percentage is 100%, the new asphalt has penetration of less than 75 (0.1mm) and a softening point of more than 48 DEG C, and the recycling agent has kinematic viscosity of (50-60000) mm2 / s at a temperature of 60 DEG C. The plant-mixed warm recycled asphalt mixture provided by the invention has the advantages of simple process, no grey material, good recycling effect, low cost, wide adaptability and good road performance.

In a fuel cell system, regeneration-time voltage fixed control is implemented where during regeneration or when regeneration is expected to occur, output voltage of a fuel cell is set to a voltage value outside an oxidation reduction progress voltage range, and the amount of reactant gas supplied to the fuel cell is changed based on the amount of electric power remaining in an energy storage device. In the regeneration-time voltage fixed control, it is determined whether or not regeneration occurs while a moving body equipped with the fuel cell system is moving down a slope, and in the case where it is determined that regeneration occurs while the moving body is moving down a slope, the amount of the reactant gas supplied to the fuel cell is decreased in comparison with the case where it is determined that regeneration occurs while the moving body is not moving down a slope.

The invention discloses a fluidized bed reaction device for preparing olefins by using paraffin dehydrogenation and a paraffin dehydrogenation method. The reaction device is a reducing tank body, and the tank body is divided into a gas stripping section, a reaction section and a catalyst settling section from bottom to top, wherein the diameter of the reaction section is larger than the diameter of the gas stripping section; and a heat exchanger is arranged in the settling section. According to the reaction device, raw materials and high-temperature oil gas are subjected to heat exchange in the reaction device, the raw materials are gasified and heated by utilizing the heat energy of the high-temperature oil gas, the high-temperature oil gas is cooled by virtue of heat exchange, the mutual energy is well utilized, coking of the reaction device due to high temperature is avoided, multiple effects are organically combined together, particularly a heat exchanger structure of connecting multiple heat exchange boxes in series together is adopted, the vibration caused by rapid gasification of the raw materials can be effectively avoided, and large temperature difference heat exchange can be realized.