281results about How to "Small circulation resistance" patented technology

The invention relates to an off-gas baffle door which comprises three flues and baffle doors arranged in the flues. The invention is characterized in that the baffle door has a single-piece single-shaft structure; a door shaft is positioned at the top of the baffle door and is arranged horizontally, and the baffle door can turn around the shaft in an angle between 0 and 90 degrees; double-layer elastic metal sheets which preserve a gap between layers and interlaced positioning of layers are respectively adopted around the two side faces of the baffle door; double-layer sealing boards corresponding to the elastic metal sheet are respectively arranged around the flue of a matching face of the baffle door, and the elastic metal sheet is matched with the sealing board to form a sealing face; a sealed cavity is formed in the middle of the sealing face. The baffle door adopts a hydraulic driving system comprising a hydraulic oil cylinder which is arranged at the two ends of the door shaft in a mode of double-side arrangement; an emergence closing loop is arranged in the system and an energy storing device is arranged in the loop. The fume flow passage of the invention has no obstacle with low flow resistance, the sealing rate can reach 100 percent and the driving of the hydraulic oil cylinder is stable with reliable capability.

The invention discloses a residual oil hydrotreating method, the method uses a fixed bed radial reactor for residual oil hydrogenation reaction, catalyst bed layers of the fixed bed radial reactor are respectively loaded, from the inside to the outside, with a protective agent, a hydrodemetallization catalyst, a hydrodesulfurization catalyst and a hydrodenitrogenation / carbon residue removal catalyst, raw oil mixed with dissolved hydrogen enters from the reactor bottom via a feed tube for hydrotreating reaction, hydrogenated generation oil is collected by a generation oil collection zone, and then discharged out of the reactor. The method avoids the defects that in the prior art, when the hydrodemetallization activity of a front catalyst of a fixed bed residual oil hydrogenation unit is lost, hydrodemetallization reaction is undertaken completely by a rear catalyst, and the rear catalyst deactivation is accelerated, overall improves the active resource utilization rate of catalysts, and can effectively reduce the varieties and specifications of the catalysts without too much increase of the protective agent, the raw oil can be in stable and long-term operation at the optimum reaction temperature, and temperature increasing operation is not needed for compensation of the catalyst activity.

The invention relates to a waste gas recovery system device of a noise elimination and air cooling static catalytic cracker of an internal-combustion engine, comprising a tail gas recycling device, atail gas recycling nozzle, a tail gas recycling connecting pipe, an engine exhaust system, an exhaust pipe, an air cooling static noise eliminator, an ozone generator, an air cooling static NOX catalyst, an exhaust flow divider, an air cooling NOX catalyst, a semiconductor refrigerator, an axial flow fan, an air cooling particle catcher and an air cooling static mixing catalyst. The waste gas recovery system device is connected with an air supplying system and an oil line system so as to form new external three systems. The invention is suitable for a plane, a steamship, a diesel engine generating set, an internal-combustion locomotive, a motorcycle, a gasoline car, a diesel car, an oil drilling diesel machine, an industrial boiler, a domestic gas cooker, and the like, has simple and convenient installation, i.e. an original system of the internal-combustion engine is taken down and replace with the new system, can save the oil by 15-30 percent without exhaust pollution, prolongs the service life of the internal-combustion engine, is a major energy-saving brainstorm project during the Eleventh Five-Year Plan and is the major breakthrough of the waste gas recovery system--the reformation of the external three-system of an engine in 21 century.

The invention discloses a combined impeller abrasive disk type extrusion plasticizing method and a combined impeller abrasive disk type extrusion plasticizing device. A fixed abrasive disk and a rotating abrasive disk are arranged in a charging barrel; the fixed abrasive disk is arranged on the charging barrel; and the rotating abrasive disk is arranged on a power shaft. The invention is characterized in that: the fixed abrasive disk and the rotating abrasive disk are designed to be impeller type abrasive disks are formed by making a plurality of material through grooves for allowing materials to pass through and mixing the materials on whole abrasive disks along a radial direction; impeller blades form abrasive surfaces, and channels are formed by the material through grooves between theblades of the impeller abrasive disks; a plurality of like fixed impeller abrasive disks and rotating impeller abrasive disks are overlapped alternately; the materials are forcefully pressed in from the front part of the inside of the charging barrel; then under the rotation of the rotating impeller abrasive disks relative to the fixed impeller abrasive disks, the materials pass through abrasive disk gap and blade material through grooves so as to be gradually mixed, crushed, ground, softened, subjected to heat exchange and plasticized in the constantly varying material through channels and the abrasive disk gaps; and finally, the materials are discharged from a discharge hole on the rear part of the inside of the charging barrel.

The invention discloses an air inlet and exhaust valve of a compressor, which comprises a valve body, an air valve plate, a spring, a spring seat and an air inlet and exhaust connector, wherein the valve body is arranged on the valve seat; the spring applies a pretightening force during installation to press the air valve plate onto the valve seat tightly; seal is formed between the air valve plate and the valve seat to separate the channels positioned above and below the air valve plate; the air valve plate is made of an impact-resistance nonmetal material and is provided with a guide structure preventing the sidewise inclination of the air valve plate during reciprocal motion of the air valve plate; the valve body is provided with a structure matched with the guide structure; and the center of the air valve plate is provided with a central hole for reducing the weight of the air valve plate and increasing circulation area at the same time. The air valve has the advantages of compact arrangement, simple structure, small resistance to air flow, low vibration noise, high reliability and the like and is particularly suitable for use in medium and small flow reciprocating piston type compressors.

The invention relates to a fuel additive, in particular to a coke-removing and soot-cleaning combustion improver for a boiler, suitable for various boilers, kilns, and other fuel furnaces using coal, oil, gas and natural gas as fuel, such as industrial boilers, civil boilers, ship boilers, drinking water boilers, steam locomotives, and the like. The coke-removing and soot-cleaning combustion improver is prepared from the following raw materials in percentage by weight: 12.5-30 percent of sodium nitrate, 17.50-25 percent of potassium nitrate, 5.50-11 percent of calcium nitrate, 15-19 percent of salt and 15-49.50 percent of borax. The coke-removing and soot-cleaning combustion improver can prevent the forming of new coke, is beneficial to the full combustion of the fuel, ensures that deposited chimney soot is fully combusted, reduces sticky carbon and carbide, plays a certain corrosion inhibition role to the boiler and prolongs the service life of the boiler.

The present invention relates to one high temperature air heater comprising lotus root-shaped ceramic body, heat insulating layer, casing, thermocouple and containing wires. The ceramic body has several through holes, inside which there are ceramic rods wound with electrothermal wire. The ceramic body is set inside heat insulating layer and the thermocouple is set in one end of ceramic body. Air is made to enter the ceramic from one end and heated by electrothermal wire and the ceramic body. The heater has high heat efficiency, small volume, convenient temperature control and long servicelife.

The invention discloses a dehumidification method for a main cable of a suspension bridge. The surface of the main cable is sealed and wrapped by the wrapping tape, and the wrapping tape and the internal main cable steel wires form cavities at the top and the bottom, thereby facilitating the flowing of dry gas. The principle that moisture in the main cable circularly rises and falls day and nightis ingeniously utilized, and when the moisture is gathered in the cavity, dry gas is introduced to discharge the moisture. Dry gas flow resistance is small, required operation time is short, energy consumption is low, an air feeder does not need to be installed on the upper portion of the bridge tower, and investment is saved; moreover, dry gas can flow at low pressure, the wrapping tape is not easy to break, a special gas inlet cable clamp, a special gas outlet cable clamp and a corresponding pipeline system are not required to be mounted, high-altitude operation in system maintenance is reduced, and the maintenance cost is reduced.

The invention discloses a supercharged diesel engine EGR (Exhaust Gas Recirculation) system intelligent cooling device, comprising an EGR mixer (3), a mechanical water pump (4), an electric control fan (5), a radiator (6), a thermolator (11), an EGR cooler (13), an electric control EGR valve (14), an engine ECU (Electronic Control Unit) (18), a temperature sensor (19), an exhaust gas intercooler (8) and an electric control two-position three-way valve (12), wherein an inlet of the electric control two-position three-way valve (12) is communicated with a gas outlet of the EGR cooler (13); outlets in two ends of the electric control two-position three-way valve (12) are respectively communicated with an exhaust gas inlet of the EGR mixer (3) and a gas inlet of the exhaust gas intercooler (8); a gas outlet of the exhaust gas intercooler (8) is communicated with the exhaust gas inlet of the EGR mixer (3); the electric control EGR valve (14), the electric control fan (5), the temperature sensor (19) and the electric control two-position three-way valve (12) are respectively connected with the engine ECU (18) electrically.