339results about How to "Reduce heat absorption" patented technology

The invention discloses a fabricated prestressed heat-resistant cement concrete pavement and a construction process thereof. The pavement is formed by splicing a plurality of fabricated prestressed heat-resistant pavement plates which are parallelly paved and connected into a whole through transverse prestressed steel stranded wires, wherein each fabricated prestressed heat-resistant pavement plate comprises a fabricated prestressed pavement plate which consists of a plurality of pavement plate blocks connected through connecting plates, and a vermiculite concrete heat-resistant paving layer which is paved on the fabricated prestressed pavement plate; each pavement plate block comprises a plurality of common plates which are connected into a whole through longitudinal prestressed steel stranded wires; and the connecting plates and the common plates are cement concrete prefabricated plate blocks. The construction process comprises the following steps of: 1, prefabricating the cement concrete prefabricated plate blocks; 2, transporting the cement concrete prefabricated plate blocks; and 3, paving the pavement. The pavement is reasonable in structural design, convenient to construct, low in input cost and short in construction period, and has heat resistance, construction quality is easy to ensure, and various practical problems of the traditional fabricated cement concrete pavement can be solved.

The present invention is process of painting fluorescent powder layer to the surface of LED chip. The fluorescent powder is first mixture with glue to form homogeneous fluorescent glue, and the fluorescent glue is then painted to the front side and lateral sides of the LED chip homogeneously by means of simple screen printing process. Painting fluorescent powder layer to the surface of LED chip can convert the fluorescent emitting wavelength of the LED and makes it possible to produce LED devices of different colors.

The invention relates to a metal homogenizing melting furnace. The metal homogenizing melting furnace comprises a furnace body and a support used to fix the furnace body, wherein the furnace body comprises a furnace shell, a furnace lining, a heating element and a crucible, which are sequentially arranged from outside to inside, the heating element is arranged around the outer surface of the crucible, the crucible is provided with a furnace cover, a stirrer is arranged on the furnace cover, and a stirring shaft of the stirrer is stretched into the crucible, and stirs molten liquid in the crucible through stirring impellers arranged at the bottom of the stirring shaft. The metal homogenizing melting furnace stirs molten metal through the stirrer, uniforms constituents of the molten metal obtained after melting metal, and greatly improves product quality.

The invention belongs to the technical field of thermoelectricity, and relates to an extraction condensing heat supply system additionally provided with a non-reheat medium-pressure steam turbine. A part of steam is separated from a steam exhaust port of a high-pressure cylinder of a main steam turbine to enter the added non-reheat medium-pressure steam turbine, and the rest of steam enters a reheater of a boiler and a No.II high-pressure heater; the steam entering the medium-pressure steam turbine does not need to be reheated, an independent generator II is driven, four-stage extraction steam of the medium-pressure steam turbine serves as a heat source for a No.III high-pressure heater, a No.V low-pressure heater, a No.VI low-pressure heater and a deaerator to replace a part of regenerative extraction steam of the main steam turbine, and the extraction steam of the medium-pressure steam turbine is discharged into a heater for heating network to heat heating network water. An effect of additionally installing the medium-pressure steam turbine in the extraction condensing heat supply system disclosed by the invention is to reduce heat exchange exergy loss by reducing heat exchange temperature difference of a part of regenerative heaters and the deaerator; work capability of heat supply steam flow is increased, and therefore heat loss of a high-capacity heat supply unit is caused by a high extraction steam parameter is reduced; and the extraction condensing heat supply system disclosed by the invention is suitable for heat supply and energy conservation transformation on 300 MW (megawatt), 600 MW and above steam turbine units.

The invention provides a strong, corrosion resistant protective coating comprising a homogeneous mixture of polyurea and microscopic granules capable of imparting the property of diffuse reflectivity and emissivity and its method of use as a means for reduction of thermal and radiant energy transmission and absorption as well as damage due to water, corrosion or mechanical forces when applied to the outer surface of an object or container.

The invention belongs to the technical field of combustors and relates to a novel high-efficiency energy-saving environmentally-friendly combustor. The novel high-efficiency energy-saving environmentally-friendly combustor comprises a main body. The main body comprises an outer ring flame generator with an outer ring mixing chamber. An outer ring combustor cover is arranged above the outer ring mixing chamber. The outer ring combustor cover is provided with an outer ring fire hole. The outer ring mixing chamber is connected to an outer ring injection tube. The novel high-efficiency energy-saving environmentally-friendly combustor is characterized in that an infrared combustor is arranged in the main body; the infrared combustor comprises an inner mixing chamber connected to an inner injection tube and a combustor plate arranged above the inner mixing chamber; the combustor plate is arranged above the main body formed from the outer ring combustor cover; and the combustor plate is provided with a fire hole. The novel high-efficiency energy-saving environmentally-friendly combustor realizes combination of an atmospheric combustor adopting an open fire combustion technology and an infrared combustor adopting an infrared low fire combustion technology and improves combustor combustion efficiency and exchange efficiency.

The invention provides a feedwater replacement type economizer system for whole commissioning of a denitration device. The feedwater replacement type economizer system is characterized in that the feedwater replacement type economizer system comprises a first bypass, a second bypass and a third bypass, the first bypass and the second bypass are arranged between a downcomer and a feedwater pipeline, the first bypass is provided with a vessel pot, a stop valve, a circulating pump, a flow control valve, a stop valve and a check valve in sequence from the downcomer to the feedwater pipeline, the second bypass is provided with a stop valve, a flow control valve and a check valve in sequence from the feedwater pipeline to the downcomer, one end of the third bypass is in the position between the flow control valve and the stop valve of the first bypass, the other end of the third bypass is connected with the downcomer, the third bypass is provided with a stop valve, and a flow control valve is arranged between the first bypass and the second bypass in the feedwater pipeline. By means of the feedwater replacement type economizer system, economy of a boiler is not sacrificed under heavy load, the smoke temperature of an inlet of the denitration device can be increased under low load, and the feedwater replacement type economizer system is suitable for boilers with the smoke temperature of the denitration device inlet under low load reaching 40 DEG C.

The invention discloses a solar heat collection, energy storage and back heating system applied to a thermal generator set, and belongs to the field of energy conservation and emission reduction of the thermal generator set. The solar heat collection, energy storage and back heating system provided by the invention is connected with the conventional thermal generator set through a pipeline and a valve. The solar heat collection, energy storage and back heating system consists of a heat exchanger, an oil pump, a solar heat collection field, a heat accumulator and a heat exchanger which are connected in turn in a closed-loop mode; a heating working medium input end of the heat exchanger is connected with a center tap of a water supply pump of the thermal generator set; and a heating working medium input end of the heat exchanger is connected with a certain back heating steam extraction pipeline of the thermal generator set. The system can provide qualified heating steam for a certain back-heat heater through proper valve switching operation without changing a thermodynamic system structure of the conventional thermal generator set to stop using back heating extracted steam of a primary steam turbine so that the generating coal consumption of the thermal generator set is reduced and the purposes of energy conservation and emission reduction of the thermal generator set are fulfilled.

The invention discloses magnetized plasma artillery. A magnetic field is arranged in an artillery body pipe, the direction of the magnetic field points to an artillery port along the direction of an axis of the artillery body pipe, the magnetic field strength is gradually reduced from an inner wall of the artillery body pipe to the axis of the artillery body pipe, and the gas in the artillery body pipe can be ionized into the plasma for forming a plasma sheath layer on the inner wall of the artillery body pipe under the action of the magnetic field while the artillery is launched. The magnetized plasma sheath layer formed on the inner wall of the artillery body pipe of the magnetized plasma artillery has stress anisotropic characteristic and has thermal insulation function, and then, the radial force for the artillery body pipe is greatly reduced, the driving force for the bullet is greatly improved, the heat resistance of the artillery body pipe is greatly improved and the service life is prolonged.

The invention discloses a flue gas residual heat recovery system with absorption type heat pump circulation. The system comprises a gas boiler, an air preheater and an absorption type heat pump device, wherein the absorption type heat pump device comprises an evaporator, a condenser, a throttle mechanism, an absorber, a solution pump, a generator and a throttle valve, the absorber, the solution pump, the generator and the throttle valve are connected sequentially, so as to form a loop, and the generator is sequentially connected with the condenser, the throttle mechanism and the evaporator and is finally connected to the absorber; the evaporator is provided with discharging pipes which are used for discharging flue gas and condensation water, the condenser is provided with a boiler low-temperature water supplying passage and a boiler high-temperature water supplying passage, and the boiler high-temperature water supplying passage is connected to the gas boiler; the gas boiler is provided with a high-temperature flue gas passage and a steam branch passage. Compared with the prior art, the system has the advantages that the temperature of supplied water is increased by 5-8 DEG C, and the heat absorption capacity of the supplied water in the boiler is lowered, so that the volume of combusted gas is reduced, and the aims of energy saving and emission reduction are achieved.

The invention belongs to the technical field of thermoelectricity, and relates to a high back pressure heat and power cogeneration system coupled with exhaust steam heat supply of a non-reheat steam turbine. A non-reheat medium-pressure steam turbine and generator II are added to the power generation system, and the heating system mainly includes a high backpressure heating condenser, a non-reheat medium-pressure steam turbine, a heat network heater, a remote heat network and a short-range heat network. The exhaust steam from the low-pressure cylinder of the main steam turbine enters the heating condenser to condense and release heat. The circulating water in the condenser absorbs heat and enters the short-distance heating network or heating network heater. The exhaust steam from the steam turbine is further heated and enters the remote heating network, and the return water from the remote and short-range heating networks is mixed and then enters the condenser. The invention utilizes the waste heat of the exhaust steam of the steam turbine to reduce the loss of the cooling source; the return water of the short-range and remote heating network is mixed, so that the temperature of the return water of the heating network entering the condenser is reduced, and the utilization efficiency of waste heat is improved. The invention is suitable for the heat supply transformation of 300MW and above large-capacity units with short-range low-temperature heat demand.

The invention discloses a steam jet type heat pump circulating flue gas waste heat recovery system. The steam jet type heat pump circulating flue gas waste heat recovery system comprises a gas-fired boiler, an air preheater and a steam jet type heat pump device, wherein the steam jet type heat pump device comprises an evaporator, a mixing chamber, a diffuser pipe, a condenser and a throttle mechanism, which are sequentially connected to form a loop, as well as a nozzle connected with the mixing chamber; a blow-off pipe is arranged on the evaporator and used for discharging flue gas and condensate water; a boiler low-temperature water supplying channel and a boiler high-temperature water supplying channel are formed in the condenser; the boiler high-temperature water supplying channel is connected to the gas-fired boiler; a high-temperature flue gas channel and a steam branch channel are formed in the gas-fired boiler. Compared with the prior art, the steam jet type heat pump circulating flue gas waste heat recovery system has the advantages that the water supplying temperature can be increased by 5-8 DEG C, and the heat absorption capacity of the supplied water in the boiler is reduced to reduce the fuel gas using amount, so as to achieve the purposes of saving energy and reducing emission.

The invention discloses an iron ore tunnel kiln magnetizing roasting layering material distributing reduction method. Iron ore is divided into different granularity degrees according to the granularity range; the reduction coal is flatly laid in the bottom of a tunnel kiln car according to the proportion that the reduction coal accounts for 4-6% of the total weight of iron ore; the iron ore of various granularity degrees is laid at the upper portion of the reduction coal of the tunnel kiln car, and the granularity range of each layer of iron ore is gradually increased from the bottom layer to the top layer in a layer-by-layer manner; facing materials are flatly laid at the upper portion of iron ore of various granularity degrees of the tunnel kiln car; the tunnel kiln car loaded with materials is pushed into a tunnel kiln for magnetizing roasting; and after magnetizing roasting is finished, the tunnel kiln car loaded with the materials is pushed out of the tunnel kiln. According to the method, over reduction of iron ore can be effectively prevented, the control means of iron ore magnetizing roasting is improved, and the surplus carbon recycling and utilizing cost is low. In addition, the mixing technology of iron ore and a reducing agent before magnetizing roasting of the iron ore tunnel kiln is reduced or eliminated, and the production cost of the roasted ore is reduced.

The invention discloses a method and a device for preparing H2 and separating CO2 based on a calcium-based sorbent. The method comprises that a calcium-based sorbent and pulverized coal are fed into a gasification reactor by a screw charging machine; the pulverized coal is gasified by steam to produce water gas; CH4 in the water gas is reformed into CO and H2 and CO undergoes conversion reactions to produce CO2 and H2; CO2 is absorbed by the calcium-based sorbent; H2 and residual CO2 enter into an absorption reactor; unreacted coke and CaCO3 enter into a calcination reactor; pure oxygen is fed into the calcination reactor; the coke and the pure oxygen burn and produce CO2; CaCO3 is decomposed into CaO and CO2; after separation adopting a separator, CO2 enters into a preheater and gives out heat; CaO is separated into two parts by a returning valve and one of the two parts enters into the gasification reactor and the other one of the two parts enters into the absorption reactor; CaO in the absorption reactor absorbs residual CO2 and produces CaCO3; after separation adopting a separator and condensation, clean H2 is obtained; and the separated CaCO3 enters into the calcination reactor so that sorbent recycle is realized.

The invention discloses a secondary reheating boiler type with three gas flues arranged at a tail part, and belongs to the field of power station boilers. The secondary reheating boiler type with the three gas flues arranged at the tail part comprises a tail part gas flue; the tail part gas flue is divided into a front gas flue, a middle gas flue and a rear gas flue; each of the front gas flue and the middle gas flue is provided with a low-temperature re-heater vertical section, a low-temperature re-heater horizontal section, an economizer and a flue gas adjusting baffle in sequence in a flue gas direction; the rear gas flue is provided with a hot secondary air heater, an economizer and a flue gas adjusting baffle in sequence in the flue gas direction; a hot secondary air outlet of an air pre-heater is communicated with a hot secondary air inlet of the hot secondary air heater; the hot secondary air outlet of the hot secondary air heater is communicated with a hearth. According to the secondary reheating boiler type with the three gas flues arranged at the tail part, the requirements on balancing primary and secondary low resorbent heat, regulating a reheating steam temperature and matching the resistance of the flue gas among the three gas flues are met; the absorbed heat of the economizers is reduced to prevent the economizers from vaporizing; the temperature of exhaust gas is decreased; the boiler efficiency is improved; the coal consumption of a machine set is reduced.

The invention relates to a leakage detection method for leakage water endothermic type pipelines, comprising power lines arranged in the direction of pipelines, controlled heat source lines, pulse lines and back transmission buses for signals. A heat source body is parallelly arranged on a controlled heat source line at an interval of distance with each heat source body is closely attached to a temperature transmitter and a encoding detection device. leakage water makes the temperature of the vicinity land drop, simultaneously taking away part heat of the heating heat source body, as a result, the time for the temperature transmitter in the section reaching the temperature threshold is longer than that under conditions without water leakage, the water leaking section can be identified by a smart identification recorder through identifying the two different heating-up times mentioned above.

The invention relates to the field of nuclear industry, and especially relates to an experiment-type metallic solution cavitation corrosion apparatus. The experiment-type metallic solution cavitation corrosion apparatus is mainly formed by an ultrasonic cell pulverizer and a vacuum resistance furnace. The ultrasonic cell pulverizer is mainly formed by an ultrasonic amplitude transformer, an energy transducer, a control box and a compression refrigerating machine, ultrasonic power is 3000W, cavitation can be generated in a metallic solution, ultrasonic frequency is 20KHz, amplitude is 50+/-5% [mu]m, the highest work temperature is 550 DEG C, and operation of the ultrasonic cell pulverizer can be continuously carried out at the temperature of 550 DEG C for 10-15 hours. The vacuum resistance furnace is mainly formed by a control cabinet, a furnace system, a vacuum system and a water cooling system, operation temperature is 400-600 DEG C, a crucible is made of a 304 stainless steel alloy, and a material of the vacuum resistance furnace employs common carbon steel. The apparatus can simulate the condition that cavitation corrosion of nuclear reaction equipment is generated by liquid metal with high speed flow in the field of the nuclear industry, and difficulty of research and experiment in the field of the nuclear industry can be solved, and the apparatus provides powerful guarantee for scientific research.

The invention relates to a thermochemical hydrogen production reaction performance evaluation system and a thermochemical hydrogen production reaction performance evaluation method based on a solar light-concentrating simulator. The system comprises a raw material input part, an evaporator/pre-heater, a micro multi-channel reactor, a condenser, a chromatograph, a flow pipeline system and a solar light-concentrating simulator, wherein the raw material input part comprises a liquid input part and a gas input part, the liquid input part and the gas input part are converged before the evaporator/pre-heater, the evaporator/pre-heater is a large chamber tank performing heating through electricity or solar energy, and is provided with a spraying device inside, the pre-heater simultaneously performs primary heating on a gas, the micro multi-channel reactor is connected to the evaporator/pre-heater and the condenser through pipelines, the chromatograph is used for detecting the components of the generated mixed gas, and the solar light-concentrating simulator comprises a high-power xenon lamp light source and an elliptical high-reflectivity reflection cover.

The invention provides a heat pump air conditioner provided with a thermal storage defrosting humidification device based on existing defrosting water. The air conditioner comprises an air conditioning device and is characterized in that the air conditioner further comprises the thermal storage defrosting humidification device, the thermal storage defrosting humidification device is arranged belowan outdoor heat exchanger of the air conditioning device, a water collecting port of the thermal storage defrosting humidification device is located below the outdoor heat exchanger, a water outlet of the thermal storage defrosting humidification device is located on the side surface of the outdoor heat exchanger, one end of the thermal storage defrosting humidification device communicates with acapillary tube of the air conditioning device, and the other end of the thermal storage defrosting humidification device communicates with an indoor heat exchanger of the air conditioning device. According to the heat pump air conditioner, defrosting water is utilized for storing excessive heat of a unit during heat supply in winter, during defrosting, the high-temperature defrosting water is sprayed to a frost layer for defrosting firstly and then used as the low-temperature heat source of the unit so as to evaporate retained defrosting water to dryness or to perform deicing, and meanwhile,excessive defrosting water can also be used for indoor humidification; and during refrigerating in summer, generated condensate water is used for indoor humidification or used as part of the cold source. According to the heat pump air conditioner, the defrosting time is short, no indoor heat is sucked away, a humidification function is also achieved, and wasting caused by discharging of the largeamount of defrosting water and condensate water is avoided.

The invention relates to a method for improving the efficiency of a large-scale steam turbine power generation system. The method comprises the steps of reducing or canceling a reheating steam system, and a canceled reheater is replaced with a new coal economizer, so that the efficiency of a steam turbine is improved. According to the method, the coal-fired power generation efficiency is improved, and the operation state of a denitration system is improved. For a system with steam extraction regeneration, the efficiency of the generator set can be further improved by reducing the temperature of the main steam and increasing the humidity of the main steam. According to the method, the efficiency of a fossil fuel generating set can be increased by 5%-20%, and the emission level of the greenhouse gas can be reduced. The method is also suitable for a nuclear power unit, a combined cycle unit and a solar photo-thermal unit, and has important significance in improving the power generation efficiency of the steam turbine and reducing the emission of greenhouse gas.

The invention discloses a multifunctional reflow jig for an FPC lamp bar, and solves the technical problems that the influence of an existing jig for an FPC lamp bar on the temperature of a reflow welding furnace is excessive, and a steel cover piece and a magnetic structure of the jig both need welding, and have poor reusability. The following technical scheme is adopted: the multifunctional reflow jig for the FPC lamp bar comprises a carrying disc formed from a synthetic stone material in a die-casting manner, a location base matched and clamped with the carrying disc to form one piece and formed from an aluminium alloy material in a die-casting manner, a magnet embedded on the location base, and a steel cover piece closely attracted through the magnet, used for sealing the carrying disc on the location base and formed from a steel material in a die-casting manner. The multifunctional reflow jig has the following advantages: heat absorption influence is reduced through using the carrying disc formed from the synthetic stone material and a reflow fixing fixture, clip connection is used in the structure for many times, and a lighting fixture is designed, thus an assembly process is greatly simplified, and the production efficiency is increased.

The invention relates to a pressure resisting airtight cold plate vacuum brazing universal tool. The universal tool comprises a mother-son plate and a base plate with the back face provided with square grooves, wherein the mother-son plate is provided with square grooves arranged in a matrix manner. A cold plate is placed on the front face of the base plate, the mother-son plate is located on theother face of the cold plate, and the universal tool is used for pressing the cold plate by pressing the mother-son plate. The device can provide enough pressure in the pressure resisting airtight cold plate welding process, effective pressurizing is achieved, component deformation is corrected, and the welding gap and welding deformation of the cold plate are controlled; the welding quality, an inner runner and boundary dimension precision of the cold plate are guaranteed; and the base plate, the mother-son plate and the other components are provided with square groove structures, radiation heat absorbing and heat releasing of products in a vacuum braking furnace are facilitated, and the brazing efficiency is improved.