44results about How to "Uniform heat load" patented technology

An optical amplifier system includes a diode pump array including a plurality of semiconductor diode laser bars disposed in an array configuration and characterized by a periodic distance between adjacent semiconductor diode laser bars. The periodic distance is measured in a first direction perpendicular to each of the plurality of semiconductor diode laser bars. The diode pump array provides a pump output propagating along an optical path and characterized by a first intensity profile measured as a function of the first direction and having a variation greater than 10%. The optical amplifier system also includes a diffractive optic disposed along the optical path. The diffractive optic includes a photo-thermo-refractive glass member. The optical amplifier system further includes an amplifier slab having an input face and position along the optical path and separated from the diffractive optic by a predetermined distance. A second intensity profile measured at the input face of the amplifier slab as a function of the first direction has a variation less than 10%.

The invention relates to a supercritical circulating fluidized bed boiler with a double-return evaporating heating surface, which is characterized by comprising a descending section water-cooled screen inlet collection box connected with a hearth water-cooled wall outlet collection box, a descending section water-cooled screen connected with the descending section water-cooled screen inlet collection box, a water-cooled screen connecting collection box connected with the descending section water-cooled screen, an ascending section water-cooled screen connected with the water-cooled screen connecting collection box, and an ascending section water-cooled screen outlet collection box connected with the ascending section water-cooled screen, wherein the descending section water-cooled screen and the ascending section water-cooled screen adopt a double-return arrangement mode. The double-return arrangement mode is adopted, the hearth outlet collection box and the descending section water-cooled screen inlet collection box are arranged on the top of a hearth, the connecting length of pipelines is reduced, smaller hearth water-cooled wall heating area can be required, and the height of the hearth can be reduced.

The invention relates to a power tracking excitation control method and system for a dual-axis excitation generator. The q-axis power tracking excitation control system is used to track and control the active power of the motor, so that the actual value P of the active power is equal to the given active power value P. 0 ;The reactive power of the motor is tracked and controlled by the d-axis power tracking excitation control system, so that the actual value of reactive power Q is equal to the given value of reactive power Q 0 ; The motor excitation current is tracked and controlled by the q-axis power tracking excitation control system, so that the q-axis excitation current i fq Equal to the d-axis excitation current i fd . The invention can effectively control the power, shorten the dynamic process and reduce the oscillation amplitude.

A low-emission gas combustion furnace and a combustion-supporting air configuration method thereof relate to the technical field of combustion equipment and solve the technical problem of reducing NOx emissions. In the throat of the gas combustion furnace, the first swirler, the middle cylinder, and the second swirler are coaxially sleeved in sequence from the outside to the inside; a plurality of stable blocks are arranged symmetrically between the outer ring of the first swirler and the inner wall of the throat. Flame plate; there are multiple L-shaped gas guns and oblique gas guns arranged and fixed around the axis of the throat with equal diameters between the flame-stabilizing plates. Fuel holes and multiple lateral gas holes; there are multiple oblique gas holes on the oblique gas gun, and the gas injection directions are all inclined outwards in a divergent state without interfering with each other. Combustion-supporting air enters the throat from the central combustion-supporting air passage in the middle cylinder and the second combustion-supporting air passage outside the middle cylinder, and the combustion-supporting air entering the throat from the second combustion-supporting air passage accounts for 80% to 95% of the total combustion-supporting air. The gas combustion furnace provided by the invention has low NOx emission.

The invention provides a tube tank of a turbine condenser. The tube tank comprises multiple cooling tubes with parallel axes, and a tube containing area with two mutually independent tube areas, namely an air cooling area and a main condensation area, wherein the main condensation area is arranged around the air cooling area; the projection of an envelope curve of the tube containing area on a plane vertical to the axes of the cooling tubes forms a 'torch'-shaped pattern; the air cooling area is arranged at the middle lower part of the 'torch'; the tube tank of the main condensation area forms multiple 'flames' which are bilaterally symmetrical relative to the centre line of the 'torch' and called as trunk tube bundles of the tube tank of the condenser; and a clearance exists between adjacent trunk tube bundles in the width direction of the 'torch', and forms a steam channel. Through the invention, the heat exchange performance of the condenser is enhanced so that the condenser technology is further improved; and the applicable range of the tube tank of the condenser is expanded, and the tube tanks can be used as the tube tanks of condensers configured in the turbine units of various power levels, particularly to the nuclear power condensers with unit power over the million-kilowatt level.

The invention discloses a supercritical carbon dioxide coal-fired circulating fluidized bed boiler, a power generation system and a power generation method. The supercritical carbon dioxide coal-firedcirculating fluidized bed boiler comprises a hearth, a separator, a tail flue and an externally-arranged type heat exchanger located in a material back section of the separator. A cooling wall and anintermediate-temperature overheater are arranged in the hearth. A high-temperature reheater and a low-temperature overheater are arranged in the externally-arranged type heat exchanger, wherein the low-temperature overheater communicates with the cooling wall and the intermediate-temperature overheater. A low-temperature reheater, a high-temperature overheater, an upper-level economizer, a lower-level economizer and an air preheater are arranged in the tail flue, wherein the high-temperature overheater communicates with the intermediate-temperature overheater, the low-temperature reheater communicates with the high-temperature reheater. The working medium of the boiler is supercritical carbon dioxide. By the adoption of the supercritical carbon dioxide coal-fired circulating fluidized bedboiler, the wall temperature of the cooing wall can be effectively controlled, it is guaranteed that the boiler safely and reliably operates, and the heat efficiency is high; a power generator set tends to be miniature, a higher load response speed is obtained, the deep peak load regulation adaptability is high, the advantages of coal resources are taken into full play, the energy utilization rate is improved, and energy safety is guaranteed.

The present invention relates to a premixed burner, comprising a main fire device and an ignition device, characterized in that the main fire device includes an air mixing chamber with upper and lower openings, an air inlet opening connected to the lower end of the air mixing chamber and a side wall The air chamber, the air inlet pipe extending into the air chamber from the bottom, the main fire nozzle set at the end of the air inlet pipe located in the air chamber, the fire outlet plate covering the upper opening of the air mixing chamber, the mixing chamber The air chamber is provided with a porous plate which divides the air mixing chamber into multiple spaces, and the porous plate is provided with a plurality of air holes. The air mixing chamber is divided into multiple cavities by setting a perforated plate, so that the air entering from the air chamber and the gas injected by the main fire nozzle on the intake pipe are fully mixed in the multiple cavities separated by the perforated plate, and the combustion is complete and High thermal efficiency; by setting a fire orifice plate at the upper end of the gas mixing chamber, the flame is stable and the heat load is uniform during combustion.

The invention discloses a double-bionic tree-shaped pipe bundle type condenser of an umbrella-shaped air cooling area and belongs to the technical field of heat exchangers. The condenser consists of a plurality of heat exchange pipes, an end pipe plate, an intermediate pipe plate, an air cooling steam baffle component, an evacuation pipeline, a shell component, a water chamber and the like, wherein the heat exchange pipes on the end pipe plate of the condenser are in two separated bionic tree shapes to form a double-bionic tree-shaped pipe bundle; and the air cooling steam baffle component, two gradually-reduced air cooling pipe bundles, an air cooling communication hole or an air cooling communication pipe and the evacuation pipeline form an umbrella-shaped air cooling pipe bundle component. The condenser has the advantages of uniform and vortex-free steam flow field of the bundles of the condenser, low steam resistance, uniform heat load, low degree of super-cooling, reheat-free airevacuation, shorter evacuation pipe and higher heat transfer coefficient of the condenser. The heat transfer coefficient of the condenser can be higher than a calculation value according to a heat exchange institute (HEI) standard by over 10 percent. The condenser is obvious in energy-saving effect of a condenser set.

An ammonia low-nitrogen multi-stage swirl burner, including an outer air cylinder and an inner air cylinder, a direct air passage is formed between the inner wall of the outer air cylinder and the outer wall of the inner air cylinder, and a number of main gas pipelines are evenly distributed along the outer wall of the inner air cylinder , the inner air duct is coaxial swirl air channel, swirl air channel, central air channel and central gas injection channel from outside to inside. The central gas injection channel, swirl air channel and main gas pipeline divide the gas into three parts; the central air The air is divided into three parts by the channel, the straight air channel and the swirling air channel. The fuel and air are classified in the inner air duct. In addition, the burner can also include a flame dividing ring placed at the front end, which can divide the flame. Increase the contact area between gas and air to make the combustion more complete, and the fuel and air are mixed in layers, which is beneficial to enhance the mixing effect of gas and air. Slowing down the heat radiation transfer between the components and the surrounding high-temperature environment is conducive to improving the service life of the components.

The invention relates to a detachable waste heat recovery high-efficiency heat exchanger which comprises a shell (6); the two ends of the shell (6) are respectively connected with a tapered fluid inlet (11) and a tapered fluid outlet (15); the detachable waste heat recovery high-efficiency heat exchanger is characterized in that the tapered fluid inlet (11) is internally provided with a fluid uniform distributor (12); baffle plates are respectively arranged above and under a tube bundle as well as in front of and at rear of the tube bundle; at least two groups of detachable heat exchange units (16) which are connected in series or in parallel are arranged in the shell positioned between the tapered fluid inlet (11) and the tapered fluid outlet (15); and each heat exchange unit (16) is formed by at least two detachable U-shaped heat exchange tube bundle components (17) which are connected in series. The detachable waste heat recovery high-efficiency heat exchanger has the advantages ofbeing small in size, convenient to disassemble and convenient in daily maintenance and overhauling.