41results about How to "Increase the reflux ratio" patented technology

The invention relates to the technical field of sewage biochemical treatment, and provides an improved A2O biochemical reaction system and a sewage treatment method.The improved A2O biochemical reaction system comprises at least one anaerobic zone, at least one anoxic zone, at least one aerobic zone and at least one three-phase separator; the three-phase separator is arranged in the aerobic zone and is in sealed connection with the bottom of the aerobic zone, and the three-phase separator is suitable for dividing the aerobic zone into a first aerobic zone and a second aerobic zone. By adopting an integrated pool type structure, the occupied area is saved, the use of a high-efficiency reflux device is facilitated, the reflux energy consumption is reduced, and the nitrogen and phosphorus removal effect of the whole process can be obviously improved. The three-phase separator can automatically fall separated nitrified sludge back to the tail end of the second aerobic zone, the nitrified sludge flows back to the anoxic zone along with nitrified sludge mixed liquor, sludge backflow and internal backflow of the nitrified sludge mixed liquor can be combined into a whole, a set of backflow system is saved, a control point is reduced, operation is simpler, and operation, maintenance and management are convenient.

The invention relates to a method for continuously separating alpha-pinene and beta-pinene from turpentine. The method comprises the following steps: raw materials are subjected to a preheating treatment; a packed tower vacuum rectification process is carried out; alpha-pinene is collected with a reflux ratio of 8:1-10:1; a middle fraction is slowly collected with a reflux ratio of 20:1-30:1; beta-pinene is collected with a reflux ratio of 8:1-15:1; and when distillation is finished, while the rectification tower is not cooled and the vacuum state is not relieved, discharge is realized through the pressure difference between a tower kettle and a residual liquid tank. Therefore, intermittent distillation continuous operation is realized. With the method provided by the invention, the content of obtained alpha-pinene can be 98%, and the content of obtained beta-pinene can be 95%.

The invention discloses a method for producing pressure oxygen by air separation. The compressed air is divided into two paths: one path of the compressed air is pressurized to enter a main heat exchanger for cooling, enter an oxygen pressurizer to exchange heat with pressure liquid oxygen to be condensed into a liquid state and enter a lower tower for rectification; and the other path of the compressed air enters the main heat exchanger for cooling and is divided into two parts, and one part of the air is expanded to be fed to an upper tower for rectification. The nitrogen obtained by the lower tower enters a condensing evaporator to be condensed into two parts, namely one part of the nitrogen serving as reflux returns to the lower tower and the other part of the nitrogen is subcooled through a subcooler and divided into two paths. One path of the nitrogen serving as liquid nitrogen is led out, and the other path of the nitrogen enters the top of the upper tower. Dirty liquid air extracted from the lower tower and the obtained liquid air are subcooled through the subcooler, enter the upper tower for rectification once again and pass through the condensing evaporator so as to formliquid oxygen. The liquid oxygen which is pressurized or subjected to liquid oxygen pump pressurization enters the oxygen pressurizer to be evaporated into pressure oxygen and reheated in the main heat exchanger for output. The method for producing the pressure oxygen has the advantages of optimized flow organization, low equipment input cost, and capacity of obviously reducing the energy consumption.

A method and apparatus for treating sewage features that its bioreacting apparatus uses active sludge-biologic filter pool internal reflux, and the aeration and the non-aeration are flexibly applied to the active sludge segment and biologic filter pool segment for optimizing the treating effect.

The invention discloses a highly-efficient stable bio-doubling process sewage treatment device, which is improvement of a bio-doubling process sewage treatment device. The highly-efficient stable bio-doubling process sewage treatment device is characterized in that: an aerobic aeration area is an annular channel, a water propulsion device is arranged in the annular channel, a water-feeding mix reaction area, a water lifting area and a settlement area are internally arranged at the inner side of the annular channel, and the annular channel is respectively communicated with the settlement area and the water-feeding mix reaction area. According to the pool-type structure, the contradiction between low dissolved oxygen amount and high sludge content required by the bio-doubling process is greatly solved, the requirements on a bio-doubling process for low dissolved oxygen amount and high sludge content can be ensured, thus the practical effect and advantage representation of the bio-doubling process are ensured; two or more loops are formed through treatment, thus the involved devices are conveniently overhauled without running stop, and the reflux ratio is adjustable and high; in addition, a controllable gate or valve is additionally arranged between the lifting area and the annular channel, thus practical running adjustability is improved; and after construction or construction finish of the controllable gate or valve, an aeration device is flexibly added, or started / stopped according to water quality, thus the application expandability of the highly-efficient stable bio-doubling process sewage treatment device is good, and adaptability of the highly-efficient stable bio-doubling process sewage treatment device is strong.

The invention discloses a method for optimizing the operation of a solvent dehydration system during the production process of aromatic acid. The aromatic hydrocarbon corresponding to the aromatic acid to be prepared is taken as the azeotropic agent; then the aromatic hydrocarbon is subjected to azeotropic distillation in a solvent dehydration tower; acetic acid can be extracted from the tower bottoms; the condensed liquid from the tower top is separated, the oil phase and water phase go through a azeotropic agent refining tower and a methyl acetate recycling tower to separate methyl acetate and then flow back to the solvent dehydration tower; the top part of the solvent dehydration tower is provided with an oil phase reflux device, the upper part and the lower part of the solvent dehydration tower are both provided with a water phase reflux device; through adjusting the water phase reflux amount of the water phase reflux device arranged on the upper part of the solvent dehydration tower, the oil phase reflux amount can be reduced, thus the energy consumption of the solvent dehydration tower is reduced; the water phase reflux device arranged on the lower part of the solvent dehydration tower can bring the azeotropic agent in the lower part of the solvent dehydration tower to the upper part, and thus the phenomenon that the azeotropic agent is mixed with the condensed acetic acid in the tower kettle of the solvent dehydration tower is avoided, so the content of acetic acid that is returned to the oxidation system is stable.

A jet nozzle of a mild combustion chamber of a gas turbine comprises a fuel inside nozzle, a fuel outside spray hole, multiple rotational flow groove channels, an outside pipeline and an inside pipeline. The mixing uniformity of fuel and air at a jet nozzle outlet is improved, the outside fuel-air equivalence ratio is relatively low, flame root lifting is facilitated, too-early ignition does not occur easily, jets of the jet nozzle belong to weak rotational flows, the overall pressure loss is relatively low, the axial speed is not prone to attenuation, and increase of the smoke reflux ratio ofthe combustion chamber is facilitated.

The invention discloses a method for continuously separating high-purity longifolene from heavy turpentine. The steps of activated clay decoloration and thermal pretreatment are performed on raw materials, and discharging is performed through the pressure different between a tower kettle and a residual liquid tank under the condition of not cooling a rectifying tower or breaking the vacuum, so that energy is saved, and continuous operation of intermittent distillation is realized. The longifolene content of a longifolene product obtained by using the method is greater than 75 percent, and can be up to 95 percent in maximum.

The invention relates to a mild combustion chamber of a gas turbine. The mild combustion chamber comprises a premixed mild combustor, a first guide shell, a second guide shell, a secondary combustionchamber and a mild combustor on duty. Through array-type distribution of the mild combustors, the space of the mild combustion chamber of the gas turbine is fully utilized, the flue gas reflux ratio is increased, a partial mild combustion condition is easier to establish, and full-zone mild combustion of a combustion zone is realized; by means of radial staging, the requirement of regulation within a wide operating condition range is met; and as the mild combustor on duty, the premixed mild combustor and micro-mixing nozzles are different in axial position, axial staging of combustion is realized; the load regulation requirement is met; the uniformity of outlet temperature of the mild combustion chamber of the gas turbine is increased; pressure loss is reduced; full-zone high flue gas reflux ratio of mild combustion is realized; and the requirements of low emission within the wide operating condition range and efficient and stable operation are met.

The invention relates to a micro-aerobic biological treatment device for low-C / N-ratio manure dry-collection pig farm wastewater and a method for treating pig farm wastewater, belongs to the technical field of sewage treatment and particularly relates to the micro-aerobic biological treatment device for low-C / N-ratio manure dry-collection pig farm wastewater and a method for treating pig farm wastewater. The micro-aerobic biological treatment device is used for solving the problems of complex process, large investment in infrastructure, high energy consumption and high operating cost since the low-C / N-ratio wastewater treatment technology is not perfect in the prior art. The device comprises a micro-aerobic reactor, a sedimentation tank, a muddy water dissolved oxygen tank, a blower, a dissolved oxygen sensor, an air flow control instrument, a sludge return pump, a micro-aerobic reactor water inlet pipe, a micro-aerobic reactor water outlet pipe, a sedimentation tank water outlet pipe, a sludge return pipe, a residual sludge discharge pipe, an aeration pipe and valves. The method comprises the following step of carrying out micro-aerobic treatment on wastewater through the micro-aerobic reactor so that anaerobic respiration, aerobic respiration, nitrification and denitrification coexist in the treatment system to remove pollutants. The micro-aerobic biological treatment device is used for treating pig farm wastewater.