496results about How to "Reduce oxygen consumption" patented technology

The invention relates to method and device for gasifying a multi-segment staged converted fluidized bed. The method comprises the following steps of: supplying coal; supplying gas; gasifying; slagging; and conveying fine powder. The device for gasifying the multi-grade staged converted fluidized bed comprises an agglomerating ash separating unit, a pyrolyzing and gasifying reactor of the multi-segment staged fluidized bed and a semicoke fine powder cyclic feeding unit. The invention has the advantages of high volume utilization rate of a gasifying oven, great handling capacity and high utilization rate of total carbon, is suitable for a coal staging and converting system and can be singly used for producing gas for mass coal-based methane synthesis and coal chemical industry.

Precursor of fatal arrhythmia is detected and by setting the tolerance level for carrying out nerve stimulation depending on the severity degree of the precursor, significant variation of the heart rate is suppressed and induction of the fatal arrhythmia is repressed. For this purpose, precursor of tachyarrhythmia occurrence such as premature contraction, ST change, repolarization abnormality or the like is detected and the lower-limit of the atrium interval which becomes the tolerance level of the nerve stimulation is set according to the detected result. Then, it is constituted according to the precursor of aforesaid tachyarrhythmia such that time for making the nerve stimulation means in an operation state is to be adjusted or nerve stimulation is to be carried out as much as the heart rate of a predetermined number of times.

The invention relates to a device and method for a sludge digestive juice semi-partial nitrification anaerobic ammonia oxidation denitrification and denitrifying phosphorus removal coupling system and belongs to the technical field of biological sewage treatment. The device comprises a raw water tank, a denitrifying phosphorus removal reactor, a first regulating water tank, a semi-partial nitrification reactor, a second regulating water tank, an anaerobic ammonia oxidation reactor and a water discharging water tank; the method for the sludge digestive juice semi-partial nitrification anaerobic ammonia oxidation denitrification and denitrifying phosphorus removal coupling system comprises the steps that sludge digestive juice firstly enters the denitrifying phosphorus removal reactor, phosphorus-accumulating bacteria release phosphorus by utilizing a carbon source in raw water, then NO3-N in refluxed anaerobic ammonia oxidation effluent is utilized for carrying out denitrifying phosphorus removal, effluent is discharged into the semi-partial nitrification reactor and the anaerobic ammonia oxidation reactor for realizing removal of ammonia nitrogen in the raw water; one part of effluent of the anaerobic ammonia oxidation reactor is discharged, one part of the effluent of the anaerobic ammonia oxidation reactor is refluxed into the denitrifying phosphorus removal reactor for being used during denitrifying phosphorus removal. The method for the sludge digestive juice semi-partial nitrification anaerobic ammonia oxidation denitrification and denitrifying phosphorus removal coupling system can be applied to biological nitrogen and phosphorus removal of high ammonia nitrogen waste water with low CN ratio, oxygen consumption and energy consumption are reduced compared with the traditional denitrification and phosphorus removal technology, and denitrification and phosphorus removal efficiency is greatly improved.

The invention discloses a device and a method for denitrification of single stage autotroph in low-cellulose nitrate (CN) high-ammonia nitrogen waste water. The device comprises a raw water tank, a water inlet pump, a reactor, a secondary sedimentation tank and a sludge reflux pump, wherein overcurrent holes are arranged in the water flow direction of the reactor in an up-and-down alternative form and connected with various grid chambers, an anoxic zone grid chamber is arranged at the front end of the reactor, and an aerobic zone grid chamber is arranged at the back end of the reactor; the anoxic zone grid chamber is provided with a stirrer and an agitator blade; the aerobic zone grid chamber is provided with the stirrer, the agitator blade, an aeration riser pipe and an intermediate perforated clapboard; and the aeration riser pipe is internally provided with an aeration head, and sponge filling material is filled below the intermediate perforated clapboard, wherein filling ratio is 30-50%. In the method, shortcut nitrification is achieved above the aerobic zone through low dissolved oxygen (DO is 0.5 <-1>mg / L) and free ammonia (FA) inhibition so that ammonia nitrogen is converted to nitrite nitrogen; and anoxicammoxidation biomembrane acts on the lower part of the aerobic zone, the nitrite nitrogen and ammonia nitrogen are converted to nitrogen, thereby achieving denitrification of autotroph. The method has the advantages of low oxygen consumption, less sludge output and no extra carbon source.

The invention provides a technology and a method for treating urban sewage by three-section short-cut nitrification / anaerobic ammonia oxidation, and belongs to the technical field of biological treatment of sewage. A raw water tank, an organic substance removal sequencing batch reactor (SBR), a first regulating water tank, a short-cut nitrification SBR (provided with an on-line monitoring and feedback control system), a second regulating water tank and an autotrophic nitrogen removal up-flow anaerobic sludge bed / blanket (UASB) reactor are sequentially connected in series in the technology; and the sludge is separated according to the sludge age, so that the contradiction between denitrification and phosphorus removal sludge age is solved. By applying the real-time control technology of the short-cut nitrification SBR to the autotrophic nitrogen removal technology, the problems that the half short-cut of low ammonia nitrogen short-cut nitrification in continuous flow is difficult to maintain, the concentration ratio of ammonia nitrogen to nitrous in the effluent is difficult to control and the like are solved. By successfully applying the anaerobic ammonia oxidation technology todeep denitrification treatment of the domestic sewage, urban sewage treatment with high efficiency and low energy consumption is realized.

The invention discloses a system and method for treating municipal sewage through short-cut denitrification-anaerobic ammonia oxidation after short-cut nitrification-anaerobic ammonia oxidation and belongs to the field of sewage biological treatment. The system comprises a raw water tank, an organic matter removal and dephosphorization SBR reactor, a short-cut nitrification SBR reactor, an anaerobic ammonia oxidation granular sludge UASB reactor, a second regulating water tank and a short-cut denitrification-anaerobic ammonia oxidation UASB reactor. All functional floras are subjected to advantageous culture in different reactors according to respective growth characteristics, so that a sludge age contradiction between denitrification and dephosphorization is solved, and stability of the treatment system is enhanced; real-time control is applied to the short-cut nitrification SBR reactor to solve the problem that short-cut nitrification with a low ammonia and nitrogen level is hard to maintain stably; water discharged from the short-cut nitrification reactor and water discharged from the organic matter removal reactor are mixed to solve the problem that continuous flow half short-cut nitrification is hard to maintain; short-cut denitrification-anaerobic ammonia oxidation is used for further treatment of water discharged from the anaerobic ammonia oxidation reactor to solve the problem that nitrate nitrogen is generated during anaerobic ammonia oxidation.

Method of producing syngas in an IGCC system, comprising compressing and heating carbon dioxide-rich gas to produce heated compressed carbon dioxide-rich gas, mixing the heated compressed carbon dioxide-rich gas with oxygen and feedstock to form a feedstock mixture, subjecting the feedstock mixture to gasification to produce syngas, cooling the syngas in a radiant syngas cooler, contacting syngas cooled in the radiant syngas cooler with compressed carbon dioxide-rich gas to further cool the syngas, and removing an amount of carbon dioxide-rich gas from the product mixture and compressing the removed carbon dioxide-rich gas prior to mixing with oxygen and feedstock.

The invention relates to a slag gasifier for a pressurized fixed bed. The slag gasifier comprises a coal lock for intermittently taking coal from a bunker and feeding the coal into a pressurized gasifier container, a transition bin enabling the coal in the coal lock to be fed in the pressurized gasifier container conveniently, the pressurized gasifier container for combusting and gasifying carbon-containing solid fuels at a certain temperature and with certain pressure by virtue of a gasifying agent from a nozzle, a connection pup joint for gasifying operations of slagging, chilling, evacuation and the like, a chilling chamber for chilling and cooling molten slag and a slag lock for storing vitric slag particles and discharging the vitric slag particles to the outside by a cone valve. An operation method of the slag gasifier comprises the steps of adjusting the temperature of a raw gas outlet, gasifying carbon-containing solid fuels, adjusting the gasifying load of the gasifier, controlling the operation pressure of the gasifier, controlling the pressure difference between the connection pup joint and the gasifier, slag discharge of a slag discharging port and slag support operations, chilling and cooling molten slag, controlling water quantity of the chilling chamber to remove heat of the molten slag, storing slag particles and discharging the slag particles to the outside.

The invention discloses a sludge dephosphorizing and denitrifying biological disposing method, which comprises the following parts: adsorbing pool, sedimenting pool, regenerating pool, selecting pool, dephosphorizing pool, nitrated pool, denitrifying pool and hydrolytic acidifying pool, wherein the effluent enters in the adsorbing pool firstly to blend with reflux sludge in the selecting pool; the blending liquid is drained from adsorbing pool to sedimenting pool to separate mud from water; the supernatant enters into nitrated pool to denitrify in the denitrifying pool to drain; the sediment part of sludge is proceeded anaerobic hydrolysis in the hydrolytic acidifying pool; the supernatant is inputted into dephosphorizing pool to proceed chemical dephosphorizing; the other part of sediment pool refluxes sludge into selecting pool under anaerobic environment; the composite liquid from selecting pool is input in the regenerating pool; the other part supernatant from dephosphorizing pool is input in the denitrifying pool to accelerate denitrifying action.

The invention discloses a method and a device for removing nitrogen from coking wastewater. The method comprises the pretreatment and biochemical treatment of a facultative reactor, the biochemical treatment of an aerobic reactor, the biochemical treatment of a secondary sedimentation tank, coagulation treatment (of a coagulation reaction or a coagulation sedimentation tank) and other steps, so as to form a biological nitrogen removal process combining nitrification / denitrification, shortcut nitrification, denitrification and anaerobic ammonium oxidation. The method has the advantages that the method saves power cost by 10 to 18 percent; the water treatment cost per ton of the method is between 3.2 and 3.2 yuan; and the method is stable in operation and convenient to maintain, and has effluent COD [Cr] below 100 ma / l, ammonia nitrogen below 5 mg / l and total nitrogen below 20 mg / l.

A method for mechanically assisting the pumping action of the heart. A catheter is provided comprising an elongate member having a proximal end, a distal region, an expandable member attached in the distal region, and an inflatable member in the distal region and attached distal the expandable member. The catheter is advanced into the aorta. The expandable member is expanded to at least partially obstruct the aorta. The inflatable member is inflated during diastole. The inflatable member is then deflated during the ejection phase of the left ventricle while expansion of the expandable member is maintained. The pumping action of the heart is thereby mechanically assisted. Cerebral perfusion augmentation may also be achieved by use of combined coarctation-counterpulsation devices and methods. Devices for practicing methods with increased volume-displacement efficiency are also described.

The auxiliary breathing flow channel apparatus for an oxygen mask for pilots and crew of an airplane includes a flow control device with closed and open positions to regulate flow through an auxiliary channel. A pressure sensor such as an aneroid capsule automatically closes the auxiliary channel upon a decrease in cabin pressure. A handle also allows a user to manually move the flow regulating means to a closed position.

A technique for producing coal natural gas by utilizing crushed coal slag through gasification includes that part of crude coal gas containing CH4 produced by crushed coal slag through gasification receives sulfur tolerant shift, the other part of crude coal gas is conveyed in a sub-line and converges with the gas after sulfur tolerant shift to be cooled, the cooled gas is purified to remove CO2,H2S, naphtha and H2O and other impurities to obtain synthesis gas meeting the methane synthesis H / C ratio, the synthesis gas performs methane synthesis under the effect of methane conversion catalyst, and the methane-synthesis natural gas (SNG) is transmitted in long-distance pipeline network after compression and drying. The invention has the advantages of high gasification rate, high gasification intensity, low consumption and low water content of coal gas.

A method and a system for producing calcium carbide, the method including mixing powdery carbon-containing raw material with powdery calcium-containing raw material, and directly heating the mixture by combusting a part of carbon-containing raw material in an oxygen-containing atmosphere to produce calcium carbide. The carbon-containing raw material can be coal, semi-coke or coke, the calcium-containing raw material can be calcium carbonate, calcium oxide, calcium hydroxide or carbide slag. The system includes a raw material preheating unit, such as a fluidized bed or an entrained flow bed, and a reaction unit such as an entrained flow bed. By combustion of the by-product CO produced during the production of calcium carbide or auxiliary fuel in the air to preheat the raw materials to 500-1500° C., the carbon consumption and the oxygen consumption for the calcium carbide production can be reduced, and thus process energy consumption is further reduced.

A hydrolysis denitrification denitrification system and method. The system replaces the traditional anoxic tank with an upflow sludge bed hydrolysis reactor. The hydrolysis reactor includes: an effluent return channel, which is arranged between the sedimentation tank and the hydrolysis reactor, so that the discharged water from the sedimentation tank contains The nitrate supernatant is used as reflux to flow back into the hydrolysis reactor for hydrolysis, denitrification and denitrification. In the present invention, the hydrolysis reactor is used as the functional area of ​​pre-denitrification denitrification, and the good anaerobic environment in the hydrolysis reactor, the rapid recovery ability of the denitrification bacteria function and the sufficient supply capacity of organic matter are used to realize efficient and stable hydrolysis reaction. Nitrification and denitrification. The invention makes full use of the carbon source in the sewage, improves the denitrification efficiency, and reduces the energy consumption of the whole sewage treatment process. The invention can be combined with common urban sewage treatment processes such as AAO and oxidation ditch, and is convenient for upgrading and reforming existing facilities of sewage treatment plants.

The invention relates to a bioaugmentation treatment technology of the high ammonia nitrogen wastewater. The treatment technology is characterized in that under the condition that dissolved oxygen exists in the high ammonia nitrogen wastewater, an aerobic pool, an aerobic filter and a membrane pool are established, wherein by utilizing the metabolism of the aerobic microorganism, high concentration of organic substances are degraded, the organic substances with high molecular weight and energy are converted to substances with low molecular weight and energy; the aerobic pool adopts internal circulation and large-scale external circulation hydraulic agitation; and the aerobic filter is filled with novel fixed enzyme-floating filler and immobilized microorganism and microporous aeration and jet aeration are combined for aeration, thus the flow pattern of the nitrification filter is improved. Compared with the prior art, the system of the invention has high sludge concentration and the corresponding volume loading is also high, thus the floor space is small and the capital cost is low; the conversion rate and utilization rate of atmospheric oxygen is high, the effect of mass transfer is good, the anti-shock loading capability of the system is high, the effluent quality is stable; the operating cost is low; the density is increased relatively, the solid-liquid separating effect is good and the yield of excess sludge is low.

The present invention relates to a sewage treatment process by adopting improved alternative type active sludge method. Said sewage treatment process utilizes the equipments of treatment tank, anaerobic chamber, anoxybiontic chamber, aeration tank and flocculation precipitation tank, etc. and alternatively adopts the process steps of stirring, aeration, concentration, sludge reflus, mixing, flocculation, precipitation and biological dephosphorization, etc. so as to attain the goal of purifying sewage.

The invention discloses a method and a device for three-stage separating biomass gasification. The device mainly comprises a reacting furnace, a pyrolysis chamber which is a biomass pyrolytic reaction chamber is arranged on the upper portion of the reacting furnace, a gasification chamber and a combustion chamber are positioned in the reacting furnace, the gasification chamber is positioned inside the combustion chamber, the pyrolysis chamber and the gasification chamber are connected with a feeding pipe, a flue gas channel is arranged outside the pyrolysis chamber and the feeding pipe, a feeding device is arranged on the upper pyrolysis chamber, the lower gasification chamber is communicated with the combustion chamber, a high-temperature gas extraction outlet is arranged in the middle of the gasification chamber, flue gas rises up along the flue gas channel from the combustion chamber to the periphery of the pyrolysis chamber and then is exhausted via a flue gas outlet, and the exhausted high-temperature gas is separated and purified by a separator prior to entering an air pre-heater. Three processes of a biomass gasification generating system are completely separated, the length of a reduction area is increased, and time and temperature required by tar pyrolysis are guaranteed, so that content of tar in the gas is reduced, gas generation rate of the gasification furnace is increased, and quality of the biomass gas is improved. The device has the advantages of convenience for temperature control, energy saving, environmental protection, operating continuity and the like.

The invention relates to an integrated anaerobic ammoxidation / denitrification / dephosphorization parallel short-range nitration low-carbon municipal sewage treatment device and method, belonging to the field of sewage biological treatment. The device comprises a raw water tank, an integrated anaerobic ammoxidation / denitrification / dephosphorization reactor, a regulating water tank, a short-range nitration reactor and a water outlet tank, wherein municipal sewage respectively enters the integrated anaerobic ammoxidation / denitrification / dephosphorization reactor and short-range nitration reactor. In the integrated anaerobic ammoxidation / denitrification / dephosphorization reactor, phosphorus-accumulating bacterium fully utilizes the organic carbon source in raw water to release phosphorus in an anaerobic way. In the short-range nitration reactor, ammoxidation bacterium converts NH4<+>-N in the raw water into NO2<->-N, and the effluent water is subjected to water quantity regulation by the regulating tank to enter the integrated anaerobic ammoxidation / denitrification / dephosphorization reactor, thereby effectively removing nitrogen and also synchronously removing phosphorus and nitrogen. The method implements denitrification and dephosphorization on the sewage on the basis of saving the energy and fully utilizing the carbon source.

The invention discloses an activity enhancer for shrimps, crabs and fish in aquaculture and a preparation method thereof. The enhancer comprises the following components in parts by weight: 15-20 parts of calcium gluconate, 25-35 parts of light calcium carbonate, 15-25 parts of calcium hydrophosphate, 20-30 parts of natural anti-stress factor, 10-15 parts of amino acid and 5-10 parts of sodium percarbonate; and the natural anti-stress factor comprises the following components in parts by weight: 13-18 parts of manyprickle acathopanax root, 12-15 parts of indigo woad root, 9-12 parts of baical skullcap root, 9-12 parts of cape jasmine fruit, 7-10 parts of artemtsm, 6-8 parts of Chinese angelica, 6-8 parts of raidx astragali, 4-7 parts of rheum officinale, 4-7 parts of campanumaea pilosula, 6-9 parts of salvia miltiorrhiza bunge, 5-7 parts of tree peony bark and 5-8 parts of uncaria. The preparation method comprises the following steps: adding the raw materials into a reaction kettle for stirring and mixing; heating the reaction kettle, standing and curing to obtain a finished product; and the natural anti-stress factor is prepared by crushing the materials into powder. The invention provides an ecological preparation with high nutrition, no antibiotic and no harmful chemicals for shrimps, crabs and fish.

The invention provides a fluidized bed-entrained flow bed gas gasification method. The method comprises the following steps: 1) carrying out reaction on raw material coal and a mixture of air and steam or a mixture of oxygen and steam to obtain gas containing incompletely reacted coal and ash; 2) separating the gas obtained from the step 1) to obtain condensed fine coal air-flow and light fine coal air-flow, and carrying out reaction on the condensed fine coal air-flow with air or oxygen to obtain gas containing coal and ash; 3) carrying out reaction on the gas obtained from the step 2) and steam to obtain gas containing coal and ash; 4) carrying out reaction on the gas obtained from the step 3), the light fine coal air-flow separated from the step 2) and a mixture of steam and carbon dioxide to obtain final gas containing coal and ash. The method lowers investment and operating cost of a traditional pulverizing system by an entrained flow bed gasification method and has a substantially increased gasification temperature than a traditional fluidized bed gasification method, so as to reduce equipment cost and increase gasification efficiency.

The invention provides a treatment method and equipment for up-to-standard discharging of vitamin fermentation pharmaceutical wastewater. The treatment method includes: enabling the wastewater to sequentially pass a pretreatment unit, an anaerobic treatment unit using an IC reactor as a core, a two-stage short-cut nitrification denitrification and postpositive denitrification combined process (hereinafter referred to as a D / N / D unit) and a in-depth treatment unit adopting catalytic ozonation as a core to remove organic matter, ammonia nitrogen, total nitrogen, suspended matter and chromaticity step by step so as to reach discharging standards. The treatment method has the advantages that compared with conventional denitrification processes, oxygen consumption and alkaline adjusting agent consumption can be saved by 25% and 40% at least through multi-stage short-cut nitrification denitrification, so that infrastructure and operation cost is lowered greatly; postpositive denitrification is adopted, so that total nitrogen is ensured to be up to standards; an MBR (membrane biological reactor) is adopted to replace a secondary sedimentation tank, so that bioretention performance and stability of a system are improved greatly; the new process of catalytic ozonation which is free of agent addition and secondary pollution is adopted as the in-depth treatment unit, so that removing and decoloring effect of degradation resistant COD is excellent and the treatment method is economical and efficient.

The invention belongs to the field of medical drugs and provides medicament for treating arrhythmia. The medicament is prepared from the following TCM raw materials in parts by weight: 10-20 parts of codonopsis pilosula, 15-25 parts of radix astragali, 10-15 parts of Indian buead, 10-15 parts of roasted rhizoma atractylodis macrocephalae , 5-15 parts of radix glycyrrhizae preparata, 5-10 parts of schisandra chinensis, 10-20 parts of Chinese angelica, 5-15 parts of ligusticum wallichii, 5-15 parts of radix paeoniae alba, 15-25 parts of savia miltiorrhiza, 5-15 parts of peach kernel, 5-15 parts of safflower, 5-15 parts of rhizoma acori graminei, 5-15 parts of coptis chinensis, 5-15 parts of caulis bambusae in taeniam, 5-15 parts of pericarpium citri reticulatae, 15-25 parts of radix sophorae flavescentis, 5-15 parts of ramulus cinnamomi, 10-20 parts of rhizoma corydalis, 5-15 parts of rhizoma nardostachyos, 15-25 parts of spina date seed, 25-35 parts of dragon's bone and 25-35 parts of raw oyster shell. After treatment by adopting the medicament provided by the invention, symptoms, including palpitation, chest distress and fatigue and the like, of a patient can be improved or obviously disappear, and compared with medicament in a control group, the medicament is effective in treatment and worthy of popularization.

The invention relates to a composition with a muscle gain function, which comprises the following active ingredients of creatine, taurine, beetroot extract and beta-hydroxyl-beta-methyl butyrate. The invention further provides a sports drink comprising the composition, and the sports drink comprises the composition and a food additive. The sports drink has the functions that the muscle blood stream can be increased, the oxygen utilization rate can be enhanced, the sports energy consumption can be reduced, so that the motion function can be improved.

The invention discloses a step-by-step gasification method of pulverized coal with double beds in series, which adopts the form of circulating fluidized bed gasification furnace in series with entrained flow bed gasification furnace. The core of the invention is to use oxygen in the entrained bed to perform secondary gasification on the high-temperature dust-containing gas produced by the gasification of the circulating fluidized bed. The present invention takes circulating fluidized bed gasification as the main body, and coal gasification is mainly completed in the circulating fluidized bed. By virtue of the advantages of circulating fluidized bed gasification, the coal type adaptability of the gasification device is expanded, and the single set of gasification device is improved. production capacity. Supplemented by entrained bed gasification, with the help of its high reaction temperature and the characteristics of crude gas needing to be washed by chilled water, it solves the problems of low carbon conversion rate, low content of effective gas in syngas and coarse gas produced in circulating fluidized bed gasification. There are a series of problems such as high ash content and pyrolysis products.

The invention relates to the technical field of catalytic gasification, in particular to a catalytic gasification device, system and method, solves the problems that energy consumption is higher and industry expanding is difficult due to the fact that high-temperature overheating gasifying agents are required to be provided when carbon monoxide and hydrogen are returned to a furnace for preparation of methane in an oxygen-free gasification process in the prior art, and overcomes the defects of low methane content, poor safety and high oxygen consumption in an oxygen introducing process. The catalytic gasification device comprises a gasification furnace, wherein the gasification furnace comprises a gas distributing plate and at least one gas incident pipe, a fluidized bed reaction zone is arranged above the gas distributing plate, and the gas distributing plate is used for introducing steam and oxygen into the area, close to the gas distributing plate, of the fluidized bed reaction zone; each gas incident pipe is communicated with the area, far away from the gas distributing plate, of the fluidized bed reaction zone and is used for introducing carbon monoxide and hydrogen into the area, away from the gas distributing plate, of the fluidized bed reaction zone. The catalytic gasification device is used for preparing methane through catalytic gasification.

The invention relates to an improved UCT step-feed efficient biological denitrification and dephosphorization device based on the DEAMOX technology and an application method and belongs to the technical field of biological sewage treatment.The technical problems of high energy consumption and high carbon source adding in a common low-carbon-source urban sewage treatment process are solved through the organic matter type denitrification ammoxidation technology.The device mainly comprises an urban sewage raw water tank, an improved UCT step-feed device and a settling pond.After inoculation of activated sludge is carried out to start the improved UCT step-feed process of an activated sludge system, a second-segment anoxic reactor and a third-segment anoxic reactor are inoculated with Anammox sponge filler, and efficient denitrification and dephosphorization of low-carbon-source urban sewage are achieved by adjusting the water intake ratios of all segments, inflow water C / N and the actual anoxic zone hydraulic retention time and enhancing the denitrification ammoxidation technology of the system.The dosage of an organic carbon source is greatly reduced while aeration energy consumption is saved, and the disposal cost of residual sludge is reduced.

The invention relates to an active extract for sanwei sandalwood as well as an extraction method and a medical application thereof. The extract comprises the following active components of medicaments: fructus choerospondiatis total flavonoids, fructus choerospondiatis total phenolic acid, nutmeg total lignans, nutmeg total phenolic acid, sandalwood volatile oil and nutmeg volatile oil.

The invention relates to a pilot-operated type control air channel system of a breathing machine, which comprises an oxygen communicating pipe, an oxygen flow adjusting valve (NV1), an air communicating pipe, an air inlet one-way valve (DV1), an air flow adjusting valve (NV2), a Venturi device (WENTURI), an air supply control branch air channel and an air supply control electromagnetic valve (CV1). The oxygen flow adjusting valve is arranged on the oxygen communicating pipe, the air inlet one-way valve (DV1) and the air flow adjusting valve (NV2) are arranged on the air communicating pipe, an outlet end of the Venturi device (WENTURI) is communicated with a system external outlet via a main pipe, an inlet end of the Venturi device (WENTURI) is communicated with the oxygen communicating pipe, a bypass of the Venturi device (WENTURI) is communicated with the air communicating pipe, the oxygen communicating pipe is serially communicated with a pressure reduction pump (REG1) and the oxygen flow adjusting valve via air channels from outside to inside, the air supply control electromagnetic valve (CV1) is arranged on the air supply control branch air channel and is serially communicated with the air supply control air channel via an air channel, an inlet end of the air supply control electromagnetic valve is communicated with the oxygen communicating pipe in front of an air inlet end of the oxygen flow adjusting valve via an air channel, an outlet end of the air supply control electromagnetic valve is communicated with a pneumatic control end of the oxygen flow adjusting valve via an air channel, and an exhaust end of the air supply control electromagnetic valve is communicated with the Venturi device or the main pipe via an air channel. The air channel device can adjust oxygen concentration, the small-drift-diameter air supply control electromagnetic valve can be adopted, safety is increased, and the service life of the pilot-operated type control air channel system is prolonged.