353results about How to "Reduce air leakage rate" patented technology

The invention relates to a one-step copper smelting technology and a device thereof. The interior of a furnace body is divided into three zones, namely a smelting zone, a blowing zone and a refining zone, by a retaining wall; and two rows of spray guns which are arranged in a staggered manner and have an included angle with a vertical line are arranged at the bottoms of the zones; return dust is mixed and then added into mixed copper concentrate and a solvent through a charging opening of the smelting zone, oxygen-enriched air is sprayed through the spray guns to carry out self-heating smelting, to generate copper matte; the spray guns in the blowing zone spray oxygen-enriched air so as to blow copper matte into crude copper and slag; the spray guns in the refining zone supply oxygen-enriched air for oxidization, and supply natural gas as a reductant for reduction, and the generated anode copper with high purity is interruptedly discharged form a copper discharging opening, so that the low-altitude pollution problem caused by SO2 can be solved, the operation environment can be greatly improved, the utilization rate of sulfur and heat can be obviously increased, and further the economic benefits can be increased further; in addition, the invention provides a one-step copper smelting technology which is more advanced, shorter in flow, lower in investment, lower in comprehensive energy consumption, higher in recovery rate, and better in comprehensive utilization in comparison with the existing continuous copper smelting technology.

The invention discloses a rotary air preheater dust-blocking-prevention synergy sealing method and system. The dust-blocking-prevention synergy sealing method includes the steps that air leaked from the heat end is guided or extracted to the cold end from the heat end, and local heat exchange elements are purged and heated. The rotary air preheater dust-blocking-prevention synergy sealing system comprises a heat end primary air/smoke side sector sealing box, a heat end primary air/secondary air side sector sealing box and a cold end secondary air/smoke side sector sealing box, and further comprises a heat air leakage air flue; the heat end primary air/smoke side sector sealing box and the heat end primary air/secondary air side sector sealing box are each provided with an air inlet, one end of the heat air leakage air flue is in butt joint with the air inlets, and the other end of the heat air leakage air flue extends to a cold end secondary air highest-temperature module. By means of the rotary air preheater dust-blocking-prevention synergy sealing method and system, H2SO4 drops and liquid state NH4HSO4 are gasified while the air leaked from a preheater is reduced, and the aim of removing accumulated dust is achieved; the rotary air preheater dust-blocking-prevention synergy sealing method and system have the advantages of reducing the boiler smoke discharging temperature, restraining the accumulated dust of the preheater, reducing the air leakage rate, prolonging the service life of the heat exchange elements and the like.

The invention discloses an automatic plate feeding and discharging system for double-faced AOI (Automated Optical Inspection) of a circuit board. The automatic plate feeding and discharging system comprises a robot device, a feeding and discharging device, a double-faced dust sticking machine, a transferring device, an AOI machine, a butt joint device and a general control system for controlling the equipment to work, wherein the robot device is provided with robot mechanical arms; the double-faced dust sticking machine is located beside the feeding and discharging device; the transferring device is arranged above the feeding and discharging device and the double-faced dust sticking machine; the AOI machine comprises a face A detection and a face B detection machine; detection openings of the face A detection and the face B detection machine are opposite to the feeding and discharging device and the double-faced dust sticking machine; the robot device is located between the face A detection and the face B detection machine; and the butt joint device is located on one side of the face B detection machine and can be in up-down butt joint with the robot mechanical arms. The butt joint device can be in up-down butt joint with the robot mechanical arms so that time consumed by a plate overturning procedure is saved, and furthermore, a whole production process has relatively rapid efficiency; and the structure is compact so that the occupied area of equipment is reduced.

A process for preparing the expendable composite nitrile rubber-polyurethane glove includes generating a layer of nitrile rubber film on a mould, and dipping it in aquatic polyurethane emulsion. The resultant glove has high resistance to oil and bacterial osmosis, high weatherability, and high air and moisture permeability.

The invention discloses a method for sintering vanadium-titanium magnetite concentrate at high negative pressure and high air quantity, comprising preparing, mixing, distributing, igniting and sintering, thermally breaking, cooling and screening, wherein the sintering is carried out under the conditions of the negative pressure of over 13500a and the unit area air quantity of a sintering machine of 100-110m<3>(m<2>.min); and the low negative-pressure ignition and full-wind sintering are adopted in the igniting and sintering process. According to the method for sintering vanadium-titanium magnetite concentrate at high negative pressure and high air quantity, which is disclosed by the invention, the yield can be improved and vanadium-titanium sintering ore with high quality can be prepared at high efficiency.

The invention provides a three continuous furnace technology for continuous production of anode copper with copper concentrate. The technology is particularly characterized in that a smelting furnace, a copper making furnace and an anode furnace are in tandem arrangement successively, and kilns are connected by chutes. The technology comprises the steps that the copper concentrate and flux enter the smelting furnace and react with oxygen-enriched air to generate white matte, smelting slag and high-temperature smoke; the smelting slag overflows continuously; a slow cooling slag ladle is put through the chutes for floatation and depletion; the white matte continuously flows into the copper making furnace via siphon through the chute and reacts with the flux and the oxygen-enriched air to generate raw copper, copper converting slag and high-temperature smoke; the raw copper continuously or intermittently flows into the anode furnace via siphon through the chute; the anode furnace alternately operates and produces the anode copper via oxygenation and reduction; and the converting slag is regularly discharged, chilled, broken and returned to the smelting furnace. The technology achieves continuous operation of smelting production of the raw copper with the copper concentrate.

The invention relates to the technical field of device sealing, in particular to an elastic sheet contact type sealing device of a rotary air preheater, solving the problems of unreasonable sealing structure and large air leakage rate of a traditional rotary air preheater. The elastic sheet contact type sealing device comprises a sector plate, a radial partition plate and an axial curved plate. Sealing devices are arranged at the cold end and the hot end of a rotor of the rotary air preheater; the sealing devices comprise a plurality of sealing elements; the elements comprise element installation main plates and a plurality of layer of elastic sheets arranged on the element installation main plate; protection sheets are arranged between every two layers of adjacent elastic sheets; the working end of the elastic sheets is 5 to 20 mm higher than the sealing end face of the sector plate; and when the air preheater is rotated, the sealing elements rotate to the position below the radial sector plate of the rotary air preheater and the position of the axial curved sealing plate, and the elastic sheets, one end face of the sector plate and the axial curved sealing plate are sealed in the elastic contact mode.

The invention discloses an intelligent energy-saving air handling system for an operation room. The intelligent energy-saving air handling system comprises an air handling unit (1), an electric heating unit (5) and a noise elimination static pressure tank group which are sequentially connected through an air pipe, the air handling unit (1) is used for filtering outdoor fresh air (2) and indoor fresh air (3), the electric heating unit (5) is an air duct type electric heater and arranged on an outlet air output pipeline of the air handling unit (1) and used for electrically heating outputted air, the noise elimination static pressure tank group includes a first noise elimination static pressure tank (6) and a second noise elimination static pressure tank (7) which are connected by a plurality of circulating fan (4) parallel pipelines, and the electrically heated fresh air and return air subjected to noise elimination by the noise elimination static pressure tank group are mixed by a three-way valve, heated, sterilized and inputted to the operation room through an air supply static pressure tank (9) arranged at the top of the intelligent operation room. According to the intelligent energy-saving air handling system for the operation room, energy is saved by more than 50%.

A pneumatic tire comprising an air permeation preventive layer comprising a film of a thermoplastic resin composition containing a polyvinyl alcohol or ethylene vinyl alcohol copolymer, to which a protective film of a rubber composition containing an ethylene propylene rubber (EPM) or ethylene propylene diene rubber (EPDM) is, directly or via an adhesive, placed adjacent thereto, as one layer in at least one side thereof, whereby both a further reduction in the air leakage rate of the pneumatic tire and a good durability can be achieved and furthermore a reduction in the weight of the tire can be achieved.

The invention relates to a multi-arm ceramic sealing device of an air preheater, and the device comprises an inclined wear-resistant sealing plate, a fixed plate and a joint type spring guide regulating device, wherein the joint type spring guide regulating device comprises a rotating part, a regulating stem, a compression spring, a supporting seat and a regulating nut, the regulating stem is composed of a regulating stem I and a regulating stem II, the upper end of the regulating stem I is arranged on the back surface of the inclined wear-resistant sealing plate through the rotating part, the lower end of the regulating stem II is provided with a screw thread and connected with the regulating nut after passing through a round hole arranged in the front end of the supporting seat, the compression spring is sleeved on the regulating stem, and the rear end of the supporting seat is fixedly arranged on the fixed plate on a corresponding position. Wear-resistant ceramic blocks on the wear-resistant sealing plate can be in contact with a sector plate of the air preheater in the whole rotating process, so that the multi-arm ceramic sealing device has the advantages of good sealing effect, excellent wear resistance property, long service life, suitability for modular production, convenience for field installation, short construction period and the like. The multi-arm ceramic sealing device is most suitable for radially sealing a rotary air preheater of a large boiler.

The invention provides an underground coal mine drilling, heat injection and hole sealing integration method suitable for drilling, high-pressure heat injection and hole sealing. The method is characterized in that multiple disc-shaped slots are cut in a bottom plate rock stratum through high-pressure jet flow; a plastic sleeve is fed into a drilled hole, and grout is injected into the portion between the wall of the drilled hole and the outer wall of the plastic sleeve; after the grout is condensed, a heat injection pipe is fed into the sleeve for heat injection; after heat injection is finished, the heat injection pipe is withdrawn, two polyurethane reaction bags are arranged at the end, close to a coal bed, of the drilled hole, and the portion between the two bags is filled with a heat insulating material; grout is injected into the opening end of the drilled hole, and then hole sealing is finished. The method has the advantages of being capable of insulating heat, resistant to high pressure, high in sealing degree and the like, the problems that hole sealing fails and gas leaks from hole wall cracks due to heat loss and high pressure in the heat injection process can be effectively solved, the heat injection pipe can be recycled, and heat injection cost is low.

The invention provides a vertical flow wet-type electric precipitator and wet electric precipitation method. The vertical flow wet-type electric precipitator comprises an annular plate, a spray humidifying layer, a flue gas uniform distribution device, a dust removing electric field area, washing and spraying layers, a plurality of insulator boxes, an atomization water tank and a process water tank, wherein the spray humidifying layer comprises a fine atomizing nozzle and a spray pipeline; flue gas sequentially passes through the annular plate, the spray humidifying layer and the flue gas uniform distribution device; the dust removing electric field area is used for blocking a baffle board of a flue gas blind area; the washing and spraying layers are arranged above the dust removing electric field area; the wet electric precipitation method comprises the following steps: a continuous manner is adopted to conduct atomization and humidification on inlet flue gas and conduct uniformly distributed optimization treatment on the flue gas; an intermittent or continuous manner is adopted to conduct sprinkling and cleaning on a dust-collecting electrode and a discharge electrode; a method of hot air sweeping is adopted to ensure insulation. The vertical flow wet-type electric precipitator and the wet electric precipitation method can effectively ensure the high-efficient and stable operation of the vertical flow wet-type electric precipitator, optimize the fluid field, and strengthen turbulence and atomization of the flue gas; local micro-mixing, and collision as well as crash coagulation of fine particles are promoted; the dust removal efficiency is improved.

The invention discloses a preparation method of an integral-type vacuum heat insulation and temperature preservation plate, and belongs to the technical field of an outer temperature preservation material for building outer walls. The technical scheme to be solved is that a preparation method of a vacuum heat insulation and temperature preservation plate which has a plate-type core material, has good integrity, is low in air leakage rate, and prevents cold and hot bridge is provided. According to the technical scheme, the preparation method comprises the following steps of: step one, manufacturing a core material plate; step two, loading the core material plate, and step three, vacuumizing and packaging. According to the invention, different from the prior art that the core material is in a powder shape, the plate provided by the invention has the advantages that an inorganic material is synthesized into the plate material, and a special bonding material is adopted for bonding the core material and the packaging layer together, thus the temperature preservation plate has the integrity; the core material plate is adopted and drilled for holding an air absorption agent, the quantity and position are distributed scientifically, and the long-lasting vacuum degree is ensured; and the air leakage rate is lowered by a dual-seal mode.

The invention relates to a self-cyclic utilization device for sinter machine tail smoke and tail wind box smoke. The self-cyclic utilization device comprises a trolley (1), wherein a seal cover (8) is arranged above the trolley (1); the tail of the trolley (1) is provided with a dust-removing cover (9); a plurality of wind box (2) are connected below the trolley (1); a large gas flue (6) is arranged below the air bellows (2); and all the air bellows (2) are communicated with the large gas flue (6). The self-cyclic utilization device is characterized in that the top of the dust-removing cover (9) is closed; the seal cover (8) is internally provided with a clapboard II (11); the seal cover (8) is divided into front and back sections by the clapboard II (11), the front section of the seal cover (8) is closed, and the back section of the seal cover (8) is communicated with the dust-removing cover (9); and a clapboard I (10) is arranged inside the large gas flue (6) and divides the large gas flue (6) into the front and back sections, the front section of the large gas flue (6) is sequentially connected with a dust remover (5), a main draft fan (4) and a chimney (3), and the back section of the large gas flue (6) is connected to the front section of the seal cover (8) through a pipeline.

A large stepping type rotating pulse desuter is composed of an upper barrel (with an air outlet), a volute, a middle barrel, an ash hopper, a support, a top guardrail, a compressed air inlet pipe, an air bag, a pulse valve, a stepping motor, a speed shifting mechanism, spray-blow pipes, a top cover, a tube nest, a filter bag assembly, a guide grid and an ash discharging valve. The large stepping type rotating pulse desuter is of a round structure and is simple in structure, convenient to construct and high in compression strength. A filter bag is a round special denting-preventing device. The tube nest is specially arranged. Filter area of one deduster reaches 2540 square meters, and one deduster is only provided with one pulse valve, two to three spray-blow pipes and one air bag arranged in an air purifying chamber and rotating to be balanced. An air inlet is arranged on the upper portion of the middle barrel and is a tangential cyclone inlet. A module type structure is adopted so that processing and transporting are facilitated. A plurality of large stepping type rotating pulse desuters can form a super large pulse desuter which has the advantages of being low in investment and operation expanse and wide in adaptive range.

The present invention provides a magnetic field sealing method of air-gap. It is characterized by that on the air-gap of fixed body to be sealed a sealing groove correspondent to contact surface of mobile body is set, in the sealing groove bottom portion a magnetic field source is set, the groove interior is filled up with magnetic sealing medium to form magnetic field. The invented magnetic field flexible sealing theory is characterized by that in the air-gap to be sealed a magnetic field is created, the contact surface of said air-gap is filled up with magnetic sealing medium, under the action of magnetic field in the air-gap said magnetic sealing medium can be stably stored in the sealed air-gap, so that said sealed portion can obtain 'zero' leakage.

The invention discloses a quartz-crystal resonator. The quartz-crystal resonator comprises an outer shell, a wafer and a pin. The outer shell is composed of a substrate and an upper shell body. The base plate comprises a substrate body and a boss, wherein the substrate body protrudes to form the boss. A step face is formed on the outer side of the boss, and an annular groove is formed in the step face and filled with sealing gum. The upper shell body comprises a cover with the closed upper end, an opening is formed in the lower end of the cover, the lower end of the cover is inserted into the annular groove, and a gap between the inner surface of the annular groove and the outer surface of the lower end of the cover is sealed through sealing gum. The wafer is fixedly installed on the boss of the substrate. The pin is fixed to the substrate through an insulator and electrically connected with the wafer. The invention further discloses a packaging technology of the quartz-crystal resonator. By means of the quartz-crystal resonator and the packaging technology, the good sealing effect can be played, air leakage and the like can be avoided, the vacuum degree can be greatly improved, the air leakage rate can be lowered, and meanwhile stability and firmness are better.

The invention relates to a part control phase change air preheating system and an air preheating method. The part control phase change air preheating system and the air preheating method well solve the coupling problem of traditional air preheater low temperature corrosion and heat efficiency, an operating method of the air preheating system can be timely adjusted according to actual operation parameters, adjusting capability is greatly increased, and not only is economy and high efficiency of a thermal circulation system guaranteed, but also security and adaptability of the air preheating system can be improved.

The invention discloses a regenerative system of a turbogenerator unit and an operation method thereof. The system comprises a high-pressure cylinder and a high-pressure heater, wherein an steam exhaust port and a plurality of high-pressure steam extraction ports whose steam extraction pressure is increased sequentially are formed in the high-pressure cylinder, the high-pressure steam extraction ports are connected with the same high-pressure heater through high-pressure steam extraction pipelines, and an extraction check valve and an isolated valve are arranged on each high-pressure steam extraction pipeline. When the turbogenerator unit operates at a rated load, a first high-pressure steam extraction port with the lowest steam extraction pressure supplies steam for the high-pressure heater, and the steam extraction pressure at the time is set to be P0; when the turbogenerator unit operates in a state lower than the rated load, a high-pressure steam extraction port with steam extraction pressure less than or equal to P0 or closer to P0 is selected to supply steam for the high-pressure heater, and the isolated valves on other high-pressure steam extraction pipelines are switched off. According to the regenerative system of the turbogenerator unit and the operation method thereof, a denitration system can operate normally when the unit operates at a low load, the boiler feeding temperature is increased, and the thermodynamic cycle efficiency of the unit is improved accordingly.

The invention discloses a flexible sealing structure of a rotary air pre-heater. The flexible sealing structure is a contact type sealing device and comprises a sealing sliding block, a regulation supporting seat and a supporting fixing plate; the sealing sliding block is rotatablely connected with the supporting fixing plate; the supporting fixing plate is relatively arranged on a radial baffle plate of the air pre-heater fixedly; the regulation supporting seat is fixedly connected with the supporting fixing plate; a compression spring is arranged between the regulation supporting seat and the sealing sliding block; the sealing sliding block is in contact with a fan-shaped plate or an axial arc-shaped plate of the air pre-heater; a reset regulation device is arranged between the sealing sliding block and the regulation supporting seat; two ends of the reset regulation device are respectively connected with the sealing sliding block and the regulation supporting seat; and the reset regulation device is used for regulating the maximal resilience modulus of the compression spring positioned between the sealing sliding block and the regulation supporting seat. By using the flexible sealing structure, through regulating the reset regulation device, the regulation of sealing acting force between a moving component and a stationary component in the air pre-heater is realized; the wear of a sealing surface is decreased; and the service life of a quick-wear part is prolonged.

The invention provides a process for producing anode copper by adoption of four connected furnaces. The process is particularly characterized in that a smelting furnace, a slagging furnace, a copper preparation furnace and an anode furnace are connected in series from front to back and are connected through chutes. The process mainly comprises the steps that copper concentrate and flux enter the smelting furnace to react with oxygen-enriched air to generate smelting slag and copper matte, and the smelting slag continuously overflows and is put into a slow cooling slag bag through the corresponding chute; the copper matte is siphoned to continuously flow into the slagging furnace through the corresponding chute and reacts with flux and oxygen-enriched air to generate converting slag, white matte and high-temperature smoke; the converting slag continuously overflows and is put into the slow cooling slag bag through the corresponding chute; the white matte is siphoned to continuously flow into the copper preparation furnace through the corresponding chute and reacts with flux and oxygen-enriched air to generate converting slag, crude copper and high-temperature smoke; copper preparation slag is discharged regularly and is quenched and broken to return to the slagging furnace; crude copper is siphoned and continuously or discontinuously flows into the anode furnace through the corresponding chute, the anode furnace operates alternately, and anode copper is obtained through oxidation and reduction. The process achieves continuous operation of the crude copper production process.

The invention provides an external expansion joint type glass-metal sealing-in end socket structure with an internal shielding cover. The external expansion joint type glass-metal sealing-in end socket structure is particularly suitable for a groove type photo-thermal high-temperature heat collecting pipe. The structure is mainly characterized in that a metal shielding cover (8) is connected to a metal end cover (2), and is arranged between a metal pipe (1) and an external expansion joint (3), so that the heat of the medium in a metal pipe (1) can be preventing from being transmitted to the outside; the shielding cover (8) is used for shielding a glass-metal sealing-in part, thus, the temperature of the sealing-in part is reduced, and an effect of thermal shock protection can be achieved; and the sealing-in part comprises a kovar alloy ring (4), a piece of transition glass (5) wrapped on the kovar alloy ring (4), and a glass pipe (6) connected with the piece of transition glass, so that protection for the sealing-in part is finally favorably achieved, air tightness in sealing is improved, and service life of the heat collecting pipe is prolonged.

The invention discloses a discharging control method for a nose electrical precipitator for reducing the air leakage rate of a sintering system. The method comprises the following steps: acquiring an electric field sequence number of an ash storage bin of the nose electrical precipitator; judging whether the ash storage bin belongs to a first electric field; detecting the actual discharging period of the nose electrical precipitator and the actual discharging time of the first electric field by using the ash storage bin when the ash storage bin belongs to the first electric field; determining a first new discharging time sequence of the nose electrical precipitator; calculating the actual discharging ratio of current post electric field of the ash storage bin to the first electric field when the ash storage bin does not belong to the first electric field; determining a second new discharging time sequence of the nose electrical precipitator; and controlling the nose electrical precipitator to discharge by adopting a gradual discharging mode of a discharge valve in each electric field according to the first new discharging time sequence or the second new discharging time sequence. The invention also provides a discharging control system for the nose electrical precipitator for reducing the air leakage rate of the sintering system. By adopting the method and the system, the air leakage rate of the overall sintering system can be reduced.