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124results about How to "Increase work" patented technology

System and method for comprehensively utilizing residual heat of compressed natural gas engine (CNGE)

The invention discloses a system and a method for comprehensively utilizing residual heat of a compressed natural gas engine (CNGE), which relates to a novel energy-saving technology of an engine. In the method, high-pressure fuel gas output by a high-pressure gas cylinder is heated with tail gas and/or the residual heat of water in a cylinder sleeve by using a residual heat exchanger, and the high-pressure fuel gas is depressurized and treated by using two stages of expansion machine devices (a variable-expansion-ratio expansion machine serving as one stage and a fixed-expansion-ratio expansion machine serving as the other stage), so that the fuel gas pressure needed by engine combustion is reached; meanwhile, pressure energy and residual heat are utilized comprehensively by using the expansion machines, so that the output shaft power of the engine is increased, the system efficiency of the engine is increased, the driving mileage is increased, and natural gas consumption is reduced. The device disclosed by the invention is compact in structure, and is reliable in performance; 80 percent of energy consumed in a natural gas compressing process is recovered, so that the advantage of natural gas serving as engine fuel gas is improved remarkably.
Owner:中科九朗(北京)能源科技有限公司

Coal-fired secondary reheating steam turbine generator unit integrated with supercritical CO2 circulation

The invention belongs to the technical field of secondary reheating steam turbine generating and energy saving and discloses a coal-fired secondary reheating steam turbine generator unit integrated with supercritical CO2 circulation. The unit comprises a coal-fired boiler, a secondary reheating steam turbine generator unit and a supercritical CO2 circulating generation system. Six-stage extractionsteam connected with a high pressure cylinder and an intermediate pressure cylinder is connected with steam-CO2 heat exchangers and enters corresponding feed water regenerative heaters after heatingCO2; in the CO2 circulating generation system, CO2 at an outlet of a compressor is divided into two streams, the two streams are heated by three stages of steam-CO2 heat exchangers respectively and are converged to enter a CO2 turbine for working, and CO2 exhaust enters the compressor after passing through a CO2-feed water heater and a CO2-air preheater sequentially; in a flue at the tail of the boiler, air is divided into two streams, and the two streams are preheated by the CO2-air preheater and a low-temperature air preheater respectively and are converged to enter a main air preheater. Bythe aid of the integrated system, the superheat degree of regenerative extraction steam of the secondary reheating unit and the exergy loss of air preheating are substantially reduced, the work of a steam turbine is increased, and the efficiency is improved.
Owner:NORTH CHINA ELECTRIC POWER UNIV (BAODING)

Waste heat utilization system capable of guaranteeing lignite boiler dry output and SCR safe flue gas temperature

The invention discloses a bootstrap system capable of guaranteeing lignite boiler dry output and SCR safe flue gas temperature. The bootstrap system comprises a boiler tail flue and a flue gas denitrification SCR which is arranged at the tail end of the boil tail flue. A bypass flue communicated with the boil tail flue is further parallelly connected between a flue gas inlet of an economizer and a flue gas inlet of the flue gas denitrification SCR. The bypass flue is internally and sequentially provided with a primary-air tubular heater and a low-pressure economizer which are used for lowering temperature of flue gas entering the flue gas denitrification SCR. Due to the arrangement that the bypass flue is additionally arranged on the tail portion of a boiler, and the primary-air heater is arranged on the upper portion of the bypass flue, primary-air temperature is ensured to meet requirements of a coal pulverizing system. The amount of flue gas passing through the economizer can be regulated by the bypass flue, so that flue gas temperature at the exit of the economizer can be regulated. The primary air is heated to the temperature as required by the high-temperature flue gas at the inlet of the economizer, and meanwhile, the flue gas temperature in the bypass flue is lowered through the low-pressure economizer, so that the flue gas temperature at the inlet of the SCR can meet the requirements of catalyst.
Owner:XIAN TPRI BOILER ENVIRONMENTAL PROTECTION ENG CO LTD +1

Steam-injection-type solar and thermal power station complementary generating system

The invention discloses a steam-injection-type solar and thermal power station complementary generating system. The generating system comprises a first parabolic-trough-type solar collector, a solar steam generator, a diverter, a second parabolic-trough-type solar collector, a solar superheater, a mixer, a solar preheater, a coal burning boiler as well as a high pressure cylinder, an intermediate pressure cylinder and a low pressure steam cylinder of a steam turbine, wherein feedwater passes through the solar preheater, the solar steam generator and the solar superheater, and indirectly absorbs solar energy through conduction oil or enters the solar collectors to absorb the solar energy so as to be converted into superheated steam, and the superheated steam is injected the high pressure cylinder or the intermediate pressure cylinder of the steam turbine; and the superheated steam is mixed with the superheated seam generated by the coal burning boiler in the high pressure cylinder or the intermediate pressure cylinder of the steam turbine, and the mixture expands to do work in the high pressure cylinder or the intermediate pressure cylinder of the steam turbine to output power to a generator so as to carry out electricity generation. The generating system provided by the invention can be used for realizing the dilatation and consumption reduction of a thermal power station and solving the problem of unstable and discontinuous solar energy, thereby being beneficial to the large-sale popularization and application of a solar energy technology.
Owner:INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI

Power generation system capable of realizing complementation between solar energy and biomass energy

The invention discloses a power generation system capable of realizing complementation between solar energy and biomass energy. The power generation system comprises a slot type solar heat collection sub-system, a biomass after-burning sub-system and a power generation sub-system, wherein the slot type solar heat collection sub-system comprises a solar heat collection field, an oil-water heat exchanger and a heat conduction oil pump, and is used for receiving and gathering solar radiation energy; supplied water is heated up to a certain temperature or is heated until becoming steam by the oil-water heat exchanger; waste heat of heat conduction oil is used for replacing part or all high-pressure cylinder extract air of a steam turbine for heating the low-temperature supplied water; the biomass after-burning sub-system comprises a biomass boiler, a superheater, a reheater and an air pre-heater, and is used for generating high-temperature flue gas and heating products at an outlet of the oil-water heat exchanger and steam at an outlet of a high-pressure cylinder into high-temperature and high-pressure steam; the power generation sub-system comprises the steam turbine and a generator set, and is used for converting received thermal energy into electric energy and outputting the electric energy. After the power generation system capable of realizing complementation between solar energy and biomass energy is adopted, the problem that a slot type solar single thermal power generation system is low in main steam parameter can be solved, the dosage of biomass is reduced, and the biomass resource collection, transportation and storage costs can be lowered.
Owner:INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI

Semi-open type water pump and washing machine to which water pump is applied

The invention relates to a semi-open type water pump. The semi-open type water pump comprises a shell and an impeller. A water inlet is formed in the first side wall of the shell, a water outlet is formed in the second side wall of the shell, and a containing cavity for containing the upper portion of the impeller is formed in the position, corresponding to the water inlet, in the shell. The upperportion of the impeller at least comprises a first shaft located in the center, an end cover covering the upper end of the first shaft, and first blades distributed on the lower wall face of the endcover at intervals and arranged around the periphery of the first shaft. The upper wall face of the end cover is arranged close to the inner top wall of the containing cavity, and a gap is formed between the upper wall face of the end cover and the inner top wall of the containing cavity. According to the semi-open type water pump structure, the lower portion of the impeller is of an open type structure exposed out of the shell, the upper portion of the impeller is arranged in the shell, and the upper end of the impeller is sealed; and through the arrangement of the end cover, vortexes formedbetween the upper end of the impeller and the inner top wall of the containing cavity can be avoided, energy losses are reduced, work applied to fluid is improved, thus, the flow speed of effluent ofa spraying arm is increased, and then the washing effect is improved.
Owner:NINGBO FOTILE KITCHEN WARE CO LTD

Low-grade thermally-driven Rankine power generation device with ejector

The invention discloses a low-grade thermally-driven Rankine power generation device with an ejector, which comprises a generator, an expansion machine, a power generator, an ejector, an absorber, a circulating pump and a solution heat exchanger. The circulating pump transports the working fluid required to complete an absorption process in the absorber to the generator through the low-temperature side of the solution heat exchanger; an absorbent solution on the high-temperature side of the solution heat exchanger is cooled and then fed into the ejector; the working fluid in the generator is heated by an input heating source so as to generate high-pressure working steam; the high-pressure working steam is fed into the expansion machine for doing work through expanding; the working steam subjected to expansion is fed into the ejector, and is injected by the working fluid in the ejector; and finally, the working steam is fed into the absorber to complete the absorption process. According to the invention, the expansion machine can do more mechanical work in the process of expansion, so that the heat conversion efficiency is higher; and the mechanical work consumed in the process of transporting the solution subjected to absorption to the generator by the circulating pump is obviously reduced, therefore, the net power generation efficiency of the whole device is greatly improved.
Owner:ZHEJIANG UNIV

Brown coal pre-drying-air preheating-waste heat utilization composite coal-fired power generation system

The invention discloses a brown coal pre-drying-air preheating-waste heat utilization composite coal-fired power generation system, and belongs to the power station energy-saving field. The system is mainly characterized in that a brown coal drying system is connected with a steam turbine regenerative system and an air preheating system, a smoke heat-setting water system is connected with the steam turbine regenerative system and the air preheating system, the steam turbine regenerative system is connected with a steam turbine generating device, the air preheating system is connected between the brown coal drying system and a boiler rear smoke channel, then whole-course heating of air is finished, and brown coal can be directly burned for power generation after being dried. Energy density of the brown coal is increased, boiler efficiency is improved, heat and moisture in dried tail gas are recycled, temperature of air in an inlet of an air pre-heater is increased, meanwhile, a smoke-water heat exchanger arranged in a hearth division smoke channel recycles smoke heat, coal consumption of a unit is expected to be greatly reduced, and therefore the efficient, energy-saving, water-saving and emission-reducing effects are achieved.
Owner:NORTH CHINA ELECTRIC POWER UNIV (BAODING)

Variable working condition active-control light-coal complementation indirect air-cooling generation system and method

The invention discloses a variable working condition active-control light-coal complementation indirect air-cooling generation system and method. The system comprises a boiler, a turbine, a generator, a high-pressure fed water heater, a low-pressure fed water heater, a deaerator, a steam extraction branch control valve, an absorption type refrigerator, an air-cooling condenser, a fed water branch control valve, a mirror field heat exchanger and a composite paraboloid light condenser. In the daytime in summer, the environmental temperature rises, the back pressure of the turbine rises, the turbine carries out low-pressure steam extraction to drive the absorption type refrigerator to cool air at the inlet of the air-cooling condenser, the back pressure of the turbine is made to reach the design valve, and the light condenser is used for replacing original low-pressure steam extraction to heat fed water. In the daytime in winter, the environmental temperature decreases, the back pressure of the turbine can keep the design value, the turbine carries out low-pressure steam extraction to continue expansion working, and the light condenser is used for replacing original low-pressure steam extraction to heat fed water. By means of the variable working condition active-control light-coal complementation indirect air-cooling generation system and method, the problem of the variable working condition operation efficiency of a traditional air-cooling unit is reduced in summer is solved, the annual average generation efficiency of the unit is improved, and efficient utilization of low-temperature solar energy is achieved.
Owner:INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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