389results about How to "Stable emissions" patented technology

The present invention relates to a laser device comprising at least one large area VCSEL (101) and at least one optical feedback element (201, 301) providing an angular-selective feedback for laser radiation emitted from the laser. The angular-selective feedback is higher for at least one portion of laser radiation emitted at angles θ>0 to the optical axis (601) of the laser than for laser radiation emitted on said optical axis (601). The invention also refers to a method of stabilizing a laser emission of a large area VCSEL in a desired angular distribution (501, 502). With the proposed device and method, the intensity distribution of a large area VCSEL can be stabilized in a desired shape, for example a ring shape.

The present invention discloses a new field emitter cell and array consisting of groups of nanofilaments forming emitter cathodes. Control gates are microprocessed to be integrally formed with groups of nanofilament emitter cathodes on a substrate. Groups of nanofilaments are grown directly on the substrate material. As a result, the control gates and groups of nanofilaments are self-aligned with one another.

It is an object of the present invention to provide a pyrene derivative that is unlikely to crystallize and is superior in quality in the case of forming a film. In addition, it is an object of the present invention to provide a light-emitting element from which stable light emission can be obtained for a long stretch of time by using the pyrene derivative.

A pyrene derivative represented by the general formula (1) is synthesized. By using vacuum deposition to deposit this material, a light-emitting element from which stable light emission can be obtained efficiently for a long stretch of time can be obtained.

The present invention relates generally to metal oxide materials with varied symmetrical nanostructure morphologies. In particular, the present invention provides metal oxide materials comprising one or more metallic oxides with three-dimensionally ordered nanostructural morphologies, including hierarchical morphologies. The present invention also provides methods for producing such metal oxide materials.

The invention discloses efficient heterogeneous catalytic oxidation ferric-carbon micro-electrolysis packing and a preparation method thereof. The packing is prepared from the following raw materials in parts by weight: 45-65 parts of pure iron powder, 10-25 parts of cast iron powder, 2-8 parts of graphite powder, 5-15 parts of active carbon powder, 2-10 parts of copper powder, 2-10 parts of manganese powder, 2-10 parts of aluminum powder, 2-10 parts of fine wood bits, 1-6 parts of sodium silicate, 1-6 parts of sodium borate, 2-6 parts of pyrite dust and 5-15 parts of an adhesive. The efficient heterogeneous catalytic oxidation ferric-carbon micro-electrolysis packing disclosed by the invention is prepared by taking heterogeneous metal alloy with high potential difference as a catalyst and using a high-temperature micropore roasting technology and has the characteristics of heterogeneous metal and ferric-carbon integration, micropore framework type alloy structure, large specific surface area, low density, strong activity, high current density and the like; organic wastewater is treated so that COD, ammonia nitrogen and total phosphorus can be efficiently removed, the chroma can be reduced, the biodegradability can be improved, the treatment effect is extremely stable, and the phenomena of packing passivating, hardening and the like caused in the operation process can be avoided.

The invention relates to waste acid and water processing equipment and a technique for processing acidic sewage generated in the process of purification of an acid making system. The technique comprises the following steps: pumping the waste acid into a first-level neutralizing reaction tank in the first stage; adding calcium carbide slag to adjust the pH value between 1 and 6; adding calcium carbide slag to adjust the pH value between 5 and 6, when the liquid overflows into a second-level neutralizing reaction tank in the first stage; carrying out solid-liquid separation; entering a sewage pool; pumping the liquid in the sewage pool into a first-level neutralizing reaction tank in the second stage; adding lime milk to adjust the pH value between 6 and 7; adding lime milk to adjust the pH value between 7 and 8, when the liquid gravitationally flows into a second-level neutralizing reaction tank in the second stage; adding 7% of sodium sulphide and 15% of ferrous sulfate according to weight percentage into a vulcanization and flocculation reaction tank, when the liquid gravitationally flows into the vulcanization and flocculation reaction tank; carrying out solid-liquid separation of fine particles on the liquid by a filter press and a film filter; discharging the liquid, thus the continuous up-to-standard discharging of effluent water is easily realized.

The invention relates to a system for reducing emission of oxynitride of combustion equipment. The system comprises the combustion equipment with a burner and a flue. A gas flow adjusting valve is installed on a pipeline connecting the burner with a gas source. The flue is internally provided with a sensor used for detecting the concentration of gas components. An air inlet of the burner is connected with an air outlet of an air mixer in series. The air mixer is provided with two air inlets, one of the air inlets is connected with a combustion-supporting air pipeline with an air volume adjusting valve, the other air inlet is connected with a smoke gas returning pipeline with a smoke gas returning flow adjusting valve, the other end of the smoke gas returning pipeline is connected with the position, between the combustion equipment and the sensor, of the flue, and an air blower, the air volume adjusting valve, the smoke gas returning flow adjusting valve and the gas flow adjusting valve are controlled by a low-nitrate controller. The invention further relates to a method for reducing emission of the oxynitride of the combustion equipment. The problem that combustion is not stable in the operation process of an existing smoke gas outer circulation system is solved.

A semiconductor laser has a first diffractive grating area. The first diffractive grating area has a plurality of segments. Each segment has a first area including a diffractive grating and a second area that is space area combined to the first area. Optical lengths of at least two of the second areas are different from each other. A refractive-index of each of the segments are changeable.

Doped diffraction gratings for use in quantum cascade lasers and mid-infrared wavelength vertical cavity surface emitting lasers can be made by introducing periodic variations in the doping levels that result in periodic refractive index variations. Doping is typically accomplished by use of an n type dopant.

The invention discloses an immobilized nitrobacteria enrichment culture method and device in a sewage treatment process. A sequencing-batch biomembrane activated sludge process is utilized to perform enrichment culture on nitrobacteria: dewatered sludge is inoculated in an immobilized nitrobacteria culture device, and an enrichment culture solution is added; and in the nitrobacteria enrichment culture process, the biomembrane ammonia nitrogen load is gradually enhanced, and the pH value is controlled. The enrichment culture solution is formed by mixing NH4HCO3 and pretreated municipal sewage, the ammonia nitrogen concentrations are respectively 100, 300, 500, 700 and 1000 mg/L, and the COD (chemical oxygen demand) concentration is 30-60 mg/L. By controlling the immobilized nitrobacteria culture device, the DO in the reaction mixture is 2-6 mg/L, the pH value is 6.5-8.0, the biofilm-formation acclimatization culture temperature is 10-14 DEG C, and the enrichment purification culture temperature is 15-25 DEG C. The device can be used for culturing nitrobacteria at low temperature, and the nitrobacteria content is up to 40-45%. The immobilized nitrobacteria have high low-temperature nitration resistance, and can treat the wastewater of which the ammonia nitrogen concentration is up to 1000 mg/L, so that the ammonia nitrogen in the wastewater is lowered to 1.0 mg/L or below.

A display device includes a backside and a front-side substrates facing each other with a vacuum space therebetween; and a plurality of electron emission sites provided on the backside substrate. Each electron emission sites includes a bottom electrode formed on a surface of the backside substrate proximate to the vacuum space, an insulator layer formed over the bottom electrode, and a top electrode formed on the insulator layer and arranged individually apart from each other and facing the vacuum space. The display device also includes a plurality of bus electrodes for electrically connecting the neighboring top electrodes; and insulating protective films each provided between the bus electrode and the insulator layer and between the bus electrode and the backside substrate.

A laminated composite includes: a 1st-conductive-type cladding layer laid on a substrate; an active layer laid on the 1st-conductive-type cladding layer; and a ridge-stripe 2nd-conductive-type cladding layer laid on the active layer. A pair of films is disposed at the end faces of the laminated composite so as to oppose each other along the lamination direction. The paired films are formed to have different spectral reflectances from each other. The resonator structure is formed with the laminated composite and the paired films. When, in the length direction of the resonator, a side with one of the paired films which has a smaller spectral reflectance is the forward side and a side with the other film having a larger spectral reflectance is the backward side, the laminated composite is structured so that the optical confinement factor becomes smaller on the forward side than on the backward side.

A white LED comprising at least an excitation light source and a fluorescent powder, the excitation light source issues light with wavelength between 285 nm to 490 nm, the fluorescent powder is installed around the excitation light source to receive the light from the excitation light source; the materials of the fluorescent powders is one of the (Ca,Sr,Ba,)₈Mg(SiO₄)₄Cl₂:Eu²⁺, Dy³⁺, Mn³⁺ for better luminant efficiency and better excitation effect.

The invention discloses an optimization method and an optimization system of SCR denitrification intelligent ammonia injection based on soft measurement and predictive control. The method comprises the following steps: firstly, establishing an entrance nitrogen oxide concentration model based on operation data; then utilizing the model and currently-collected operation data to obtain a predicted value; secondly, calculating the ammonia injection amount at the current operation condition as a feedforward signal according to an entrance nitrogen oxide concentration predicted value and transmitting the feedforward signal of the ammonia injection amount to an SCR denitrification system; thirdly, measuring a measured value of exit nitrogen oxide concentration of a coal-fired generation unit combustion system, making deviation between the measured value and an entrance nitrogen oxide concentration set value and inputting a difference value into a prediction controller, obtaining a feedback control signal of the ammonia injection amount based on the deviation and transmitting the feedback control signal to the SCR denitrification system by a prediction controller; fourthly, controlling the ammonia injection amount of an SCR denitrification reactor according to the feedforward signal of the ammonia injection amount and the feedback control signal of the ammonia injection amount by theSCR denitrification system. The system disclosed by the invention has the advantages of higher response rate, lower investment, short transformation period and the like.

A film (7) is formed by electrodeposition, thermal CVD, or spraying. After that, the film is irradiated with a laser beam. Carbon nanotubes that form the film (7) are disconnected by laser irradiation, so that the density of the carbon nanotubes is optimized. When the film (7) is formed in this manner, stable emission can be obtained from a cathode structure (5).

The invention relates to a drainage network pollutant emission tracing method and device. The device comprises water quality monitoring modules, power supply devices, signal transmitting systems, a cloud service platform, and a mobile terminal; a plurality of water quality monitoring modules are respectively arranged at all monitoring points of the drainage network, a plurality of power supply devices are arranged, respectively connected with the corresponding water quality monitoring modules and used for supplying power for the corresponding water quality monitoring modules; a plurality of signal transmitting systems are arranged, connected with the corresponding water quality monitoring modules and used for sending data collected by the water quality monitoring modules to the outside; the cloud service platform is connected with the signal transmitting systems and is used for receiving the data collected by the water quality monitoring modules and processing the data to obtain an early warning value, performing tracing in combination with the position information of the water quality monitoring modules when the early warning value is exceeded, and giving an alarm in time; and themobile terminal is connected with the cloud service platform and used for receiving alarm information and water quality information. Compared with the prior art, the method and the device have the advantages that multi-node and multi-parameter real-time monitoring can be realized and the early warning can be carried out, so that pollutant emission of the industrial pollution source drainage network can be conveniently traced.

The invention discloses a selective catalytic reduction (SCR) denitrification ammonia-spraying optimization method and system based on an advanced measuring instrument and an advanced control algorithm. The method comprises steps as follows: (1) an inlet nitric oxide concentration model is established on the basis of operating data of a coal-fired thermal power generating unit combustion system; apredicted value of the inlet nitric oxide concentration is obtained by the aid of the model and the currently acquired operating data; (2) an ammonia spraying amount feed-forward signal under the current operating condition is calculated according to the predicted value and is sent to an SCR denitrification system; (3) a measured value of the outlet nitric oxide concentration of the coal-fired thermal power generating unit combustion system is deviated from a set value of the outlet nitric oxide concentration and then is input into a self-adaptive PID controller, an ammonia spraying amount feedback control signal is obtained by the self-adaptive PID controller on the basis of the deviation and an ammonia escape measured value and is sent to the SCR denitrification system; (4) the SCR denitrification system controls the ammonia spraying amount of an SCR denitrification reactor according to the ammonia spraying amount feed-forward signal and the ammonia spraying amount feedback controlsignal. The system is high in response rate and short in transformation period.

The invention relates to a method for deep treatment on industrial wastewater discharged by a styrene-butadiene rubber production device and belongs to the field of wastewater multilevel treatment. Water treatment devices such as a pre-treatment unit, a sludge adsorption unit, an aerobic biochemical treatment unit, a flocculation and filtration unit and a high-grade oxidation treatment unit are orderly connected and combined; and discharged wastewater treated by the above water treatment devices has COD less than or equal to 40mg/L and NH3-N less than or equal to 5mg/L. The method solves the problem that the prior art has a high treatment cost and poor treatment effects, is a deep treatment method having the advantages of stable, safe and reliable operation, high pollutant removal rate and low operation cost, and realizes stable and standard discharge of industrial wastewater produced by a styrene-butadiene rubber production device. Compared with the prior art, the method reduces a high-grade oxidation phase Fenton's reagent use amount by about 30%, improves treatment depth by 15% and has an industrial application value.

The invention belongs to the field of aeroengines and mainly relates to a partial pre-mixing and pre-evaporation burning chamber with a prefilm type nozzle. The head of the burning chamber consists of an auxiliary burning level and a main burning level, wherein the auxiliary burning level comprises a primary axial swirler, a contraction section, a throat, an expansion section and an auxiliary oilway nozzle; and the main burning level comprises a primary axial swirler, a primary radial swirler, a pre-mixing section, a contraction throat and the prefilm type nozzle. The burning chamber at the head in the above structure adopts a DIPME (direct injection pre-mixing and pre-evaporation) mixed burning mode with central classification, when in small fire state, the auxiliary burning level adopts a rich oil direct injection burning mode, and when in large fire state, the auxiliary burning level adopts a lean oil direct injection burning mode, and the main burning level adopts a lean oil partial pre-mixing and pre-evaporation burning mode. In order to guaranteeing fuel oil atomization, the main burning level adopts the prefilm type nozzle. The head of the burning chamber can guarantee performance of the burning chamber, and pollutant discharge is greatly reduced.

The invention discloses an ultra-low nitrogen gas burner, which comprises a combustion cylinder, a shell and a motor, wherein the combustion cylinder is connected through a rotary positioning pin, thecombustion cylinder is a necking combustion cylinder, the front end of the combustion cylinder is provided with a flue gas internal circulation channel, the flue gas is sucked into the channel to bemixed with combustion-supporting air, a fuel pipe is arranged in the combustion cylinder along the central axis, a plurality of primary fuel spray guns and secondary fuel spray guns which are arrangedaround the circumference of the fuel pipe are also arranged in the combustion cylinder, the ring layer of the primary fuel spray guns is arranged outside the ring layer of the secondary fuel spray guns, and the primary fuel spray guns and the secondary fuel spray guns are arranged at intervals around the inner ring layer and the outer ring layer of the circumference of the fuel pipe, a combustionstabilizing cover is arranged between the fuel pipe and the combustion cylinder, a plurality of blades are arranged in the combustion stabilizing cover; and after passing through the combustion stabilizing cover, the combustion-supporting air is changed into rotational flow air from direct flow air. The ultra-low nitrogen gas burner can achieve balanced combustion, reduce the yield of nitrogen oxides and meet the requirements of energy conservation and environmental protection.

The invention discloses a gas turbine engine dry-type low-NOx combustion adjustment method. According to the analysis of the combustion situation, the method is used for adjusting the D5, PM1, PM4 of a DLN-2+ combustion system as well as a purge air control value in real time through the adjustment of control constant until the combustion dynamic pressure monitoring result and the NOx and CO emission both have appropriate values. According to the invention, the combustion of a modern gas turbine engine adopting a premixed combustion technique is optimized and adjusted; the running state of the modern gas turbine engine is improved; the running stability of the modern gas turbine engine is enhanced; the damage to the heat parts of the gas turbine engine is relieved; influences of heat value variation and environment temperature variation on the operation of the gas turbine engine are prevented.

The invention relates to a sewage treatment process for road service area and a device in the process, the process is combined with biological, ecological and chemical treatment process, the sewage passes through an adjusting anaerobic pond, a dynamic biological film reactor and an artificial wetland in order, the mixing liquid of the dynamic biological film reactor flows back to the adjusting anaerobic pond, the artificial wetland is added with functional fillings for removing nitrogen and dephosphorization, the process adopts for the characteristic that the sewage in the road service area has great variable water quality and water amount and high-concentration nitrogen phosphor contaminations, so as to reach the standard. In the process the dynamic biological film reactor is adopted as aerobic treatment device, the reaction area, the sludge area and the clean water area are integrated into a reactor, thereby adapting for compact terra use in road service area, simultaneously providing conditions for combing the device with the adjusting anaerobic pond and the artificial wetland.

The invention discloses a method for processing city household garbage leachate. Aiming at the garbage leachate's characteristics of high ammonia nitrogen content and difficult biodegradation, people develop the processing method by combining and optimizing the following technologies: lime pretreatment, gas-film acid absorption, high efficient multi-grade AO biochemical treatment, and modified carbon absorption. The processing method comprises the following steps: subjecting the garbage leachate to a foam separation process so as to reduce the grease and surfactant content in the garbage leachate; adding lime into the garbage leachate so as to adjust the pH value of the garbage leachate and convert the ammonia nitrogen into a free state; subjecting the garbage leachate to processes of micro-filtration and ultrafiltration so as to eliminate macromolecular organic substances, then subjecting the garbage leachate to a gas-film acid absorption treatment so as to effectively eliminate the nitrogen ammonia with a high concentration in the garbage leachate to meet the requirements of biochemical treatment, subjecting the garbage leachate to go through an AO biochemical treatment system so as to further eliminate the pollutants such as total nitrogen, ammonia nitrogen, COD, BOD, and the like in the garbage leachate, so that after the processes mentioned above, only organic matters that are difficult to degrade and soluble are left in the garbage leachate, adopting modified carbon as an absorbent and a counter-current multi-grade absorption technology to effectively eliminate the organic matters difficult to degrade in the garbage leachate to make the garbage leachate meet the national discharging standard, and finally discharging the qualified garbage leachate.

The invention discloses an intelligent control system of an industrial furnace. The intelligent control system comprises a cement furnace body, and a decomposition furnace online smoke analyzer, a rotary kiln smoke chamber online smoke analyzer, a high-temperature fan, a tertiary air valve, a raw material detecting analyzer, a coal quality detecting analyzer, a kiln head coal scale and a kiln tail coal scale connected with the body; the intelligent control system of the industrial furnace is characterized by being connected with the cement furnace body, transmits control and sampling signals of a traditional cement furnace control system in a communication manner, and sends the control and sampling signals to the traditional cement furnace control system; and the traditional cement furnace control system sends signals needed by the intelligent control system of the industrial furnace to the intelligent control system of the industrial furnace.

The invention discloses a method for pretreating coal chemical industry production waste water and recycling resources of the waste water. According to the technical scheme, the method comprises the following steps of: (1) performing rectification, deacidification and deamination, namely feeding the coal chemical industry waste water into a rectification, deacidification and deamination tower, transferring ammonia and carbon dioxide in the waste water from a liquid phase to a gas phase, and respectively recycling 15 to 20 percent of ammonia water and ammonium bicarbonate; and (2) performing complexing extraction and recycling phenolic substances, namely adjusting the pH of the rectified residual solution in a kettle to be less than 3 by acid, adding a prepared oil phase according to a certain proportion, performing complexing extraction, after extraction is balanced, obtaining a load oil phase and pretreated waste water, performing reverse extraction on the load oil phase by sodium hydroxide solution serving as an extraction agent to obtain a concentrated sodium phenolate solution and a regenerated oil phase, acidifying the sodium phenolate to obtain crude phenol, and recycling the regenerated oil phase. Compared with the prior art, the method has the advantages that the technical flow is simple; the equipment investment is small, the energy consumption is low, the efficiency is high, and the phenol recycling rate is high; harmlessness and reclamation of the waste water are realized; and the method is obvious in economical and environmental benefits.