1341 results about "Deaerator" patented technology

The invention relates to a generating system, in particular to the heat generating system consisting of a solar heat collector and a coal-fired unit. The heat generating system adopts solar energy to take the place of the partial coal-fired heat energy of a coal-fired unit boiler. A condenser, an extraction pump, a low pressure heater, a deaerator, a water-feeding pump, a high pressure heater and the heat collector, a coal burning boiler and a steam turbine that are connected in parallel are connected in series. The steam turbine drives the generator and discharges gas into the condenser. Condensed water flows into a heater from the condenser to be heated up and pressurized, is deoxidized by the deaerator, then goes through the solar heat collector to be heated to be saturated vapor and goes into the coal burning boiler or directly goes into the coal burning boiler to become the steam with high temperature and high pressure. And then the steam goes into the steam turbine for applying work to drive the generator to generate electricity. The extracted steam of the steam turbine goes into each heater to finish thermodynamic cycle. The thermal efficiency of solar thermal power generation is improved, investment in the trough solar electrical energy generation of single paraboloid is reduced and the coal consumption of the coal-fired unit is decreased.

The invention relates to a thermal power generation system based on a high-moisture lignite pre-drying upgrading and recovering technology. The thermal power generation system comprises a boiler, a turbine, a condenser, a condensation pump, a low pressure heater, a deaerator, a water feed pump, a high pressure heater, a wet coal bin, a wet coal feeder and a coal mill and is characterized in that a lignite pre-drying device, a drain pump, a dry coal feeder, a dust remover and a heat energy and waste water recovering device are additionally arranged in the power generation system. The invention improves the energy density of fire coal and accordingly increases the efficiency of the boiler, and is capable of reducing the investment of the boiler and a milling system by a larger extent, simultaneously reducing the plant power utilization ratio, further improving the energy source comprehensive utilization efficiency of a thermal power generation plant, recovering a great deal water by using coal to produce water and saving precious water resources. The invention achieves the effects of high efficiency, energy saving, water saving and emission reduction and accords with the industrial policy of developing the low-carbon economy in China.

The invention relates to an automatic control method of 300MW grade circulating fluid bed unit, which sets the automatic control methods for the coordination of machine and furnace, the deviation of single bed pressure and double bed pressure, the water level of the deaerator and the condenser, the secondary air quantity/oxygen quantity and the secondary air pressure, the boiler bed temperature, the fuel flow and the limerock feeding during making the first 300 MW circulating fluid bed unit as the localization of manufactures, meanwhile, the 300 MW circulating fluid bed unit has the advantages of stable operation, safety, reliable and remarkable economic operation passing through the coordination and control for the system.

A power generation plant includes a steam turbine and an electrical generator driven thereby. A condenser is downstream from the steam turbine. Moreover, the power generation plant includes a steam source and an inert gas source. A deaerator downstream from the condenser and is operable to perform deaeration using the inert gas source and is also selectively operable to perform deaeration using the steam source.

The invention relates to a method to recycle saturated steam from waste heat boiler in steel plant to generate. The method is characterized in that the invention comprises a converter, a converter heat recovery boiler, a steam filtering pressure stabilizer, a saturated steam heating furnace, a heating furnace burner, a low pressure turbine, a motor, a condenser, a condensate pump, a cooling tower, a circulating water pump, a deaerator, a water supply pump, a water supply distributor, a blower, an induced draft fan and a chimney. The invention has the advantages of making full use of the current waste heat boiler of the steel plant, adopting the steam filtering pressure stabilizer and the saturated steam heating furnace, improving efficiency by 140 percent compared with the traditional small-sized medium temperature and medium pressure unit and efficiency being 20 percent up higher than that of the most efficient gas turbine in the world.

The invention discloses an intrinsically-safe water-feeding and oxygen-adding treatment method of a once-through boiler, comprising the following steps of: (1) adopting independent ammonia-adding treatment as a water-feeding treatment mode before adding oxygen of a copper-free system of a thermal power unit and adjusting the pH value at 25DEG C of water fed before the boiler to be 9.3-9.6 by adding ammonia; (2) closing an exhaust valve of a deaerator after meeting certain conditions; (3) adding oxygen at an oxygen adding point of a condensed water precision treatment outlet of the unit; (4) controlling that the content of dissolved oxygen at an inlet of a coal economizer is in the range of 5-50mu g/L and the oxygen content of main steam is not remarkably increased compared with the before adding oxygen; (5) reducing the control range of the pH value at 25DEG C of water fed before the boiler to be 8.8-9.3 after the electrical conductivity (CC) of anions of water fed before the boiler is reduced to be less than 0.15mu S/cm; (6) improving the pH value at 25DEG C of water fed before the boiler before the unit stops to be 9.3-9.6 until the unit halts; and (7) stopping the operation of the boiler and maintaining. The treatment method can be used for enhancing the buffer capacity of the water-feeding and oxygen-adding treatment and reducing the fluctuation of the dissolved oxygen content of the fed water and other parameters.

The invention discloses a deep peak shaving system of a thermal power plant. The deep peak shaving system comprises a superheater, a reheater, a high-pressure cylinder, a reheating steam electric regulating valve, a main steam electric regulating valve, a medium-pressure cylinder, a low-pressure cylinder, a condenser, a condensation water pump, a low-pressure heating water feeding heat exchanger,a water feeding pump set, a deaerator, a high-pressure heating water feeding heat exchanger, a steam turbine low-pressure steam extraction system, four-stage extraction, a steam turbine high-pressuresteam extraction system, a high-temperature molten salt water feeding heat exchanger, a high-temperature molten salt pump, a high-temperature molten salt storage tank, a low-temperature molten salt storage tank, a low-temperature molten salt pump, a molten salt preheater, a steam condensation type heat exchanger, a steam non-condensation type heat exchanger, a steam pressure reduction device and the like. According to the system, the molten salt heat storage technology is utilized, redundant steam heat is stored during load reducing peak shaving of a unit, in the process of load increasing peak shaving of the unit, high-temperature molten salt is used for heating high-pressure fed water to reduce steam extraction of a steam turbine, the output of the steam turbine is increased, the heat efficiency of the unit is improved, and the flexible and deep peak shaving of the thermal power plant is realized.

This invention relates to a waste heat combined recovery method of power station boiler and its device composition. It mainly recovers the sewage of boiler, the waste heat and cleaning water of the discharged gas from high pressure deaerator. The device includes flash tank, jet type mixed heater, degas water storage tank, frequency converting pump, softening water pump, pipeline and valve. Softened water is used as working medium. It condenses the flash steam and discharged gas from high pressure deaerator through jet type mixed heater. In the degas water storage tank, the air in the discharged gas from high pressure deaerator is removed. The heat water in the water storage tank is transported into the low pressure deaerator through frequency converting pump. Thus, it fulfills the self-using of recovered heat. This invention only brings in softened water from outside and does not change the original thermal system.

The invention relates to a fused salt heat accumulating peak regulating system for a heat-engine plant heating by means of main steam and belongs to the technical field of heat accumulating peak regulating of heat-engine plants. The system comprises a main steam regulating valve, a high pressure steam-fused salt heat exchanger, a reheated steam regulating valve, a high temperature fused salt tank,a high pressure fused salt pump, a low temperature fused salt tank, a low temperature fused salt pump, a throttling valve, a high pressure heater, a water delivery pump, a deaerator, a boiler, a highpressure cylinder and a medium pressure cylinder. When the electrical load is reduced, the utilization ratio of the boiler is fully exerted; a fused salt heat accumulating system is additionally arranged to store heat of residual stem of the boiler in the high temperature fused salt through the high pressure steam-fused salt heat exchanger; in the electrical peak stage, the high temperature fusedsalt is extracted from the fused salt tank to be fed to the high pressure steam-fused salt heat exchanger again to heat the boiler feed water and generate high temperature high pressure steam and issent to a turbine to increase the generating capacity of the turbine and play a peak regulating role on a unit. Residual steam generated by the boiler can be recovered when the electrical load is relatively low, so that the utilization ratio and the operating safety of the boiler are improved, and the purpose of being energy-saving is achieved.

The invention provides a thermoelectricity co-generation energy-saving device for supplying heat by using waste heat and an energy-saving method thereof. The device comprises a steam boiler, a turbine, an electric generator, a steam condenser, a deaerator and a cooling tower, wherein the turbine is connected with the steam condenser by an exhaust hood, and the steam condenser is connected with the cooling tower to form a big circulation of waterway; the device also comprises a waste heat utilization hot water heater comprising an absorbing type heat pump and a heat exchanger; a steam inlet of the absorbing type heat pump is connected with an extraction opening of the turbine, a water inlet of the absorbing type heat pump is connected with a water returning end of a hot water pipe network, and the steam condenser, absorbing type heat pump and cooling tower are connected to form a small circulation of waterway; a steam inlet of the heat exchanger is connected with the extraction opening of the turbine, a water inlet end of the heat exchanger is connected with a water outlet end of the absorbing type heat pump, and the water outlet end of the heat exchanger is connected with a water inlet end of the hot water pipe network; and the water drainage ends of the heat exchanger and the absorbing type heat pump are joined and then connected to the deaerator. The device of the invention has the advantages of reducing loss of a cold source, improving comprehensive heat efficiency and electric heating ratio and lowering coal consumption of the machine set in power generation.

The invention discloses a frequency converting control method and system of a condensate pump of a condensed steam generator set. When a frequency converter is in a liquid control mode, the water level of a deaerator is controlled by the frequency converter and a water adjusting valve on the deaerator, and the frequency converter controls the water level of the deaerator by adjusting the rotating speed. A water feeding main adjusting valve on the deaerator is maintained at certain aperture according to the load of a machine unit; and under the same load, when the machine unit is in a load up stage, the aperture of the water feeding main adjusting valve is maintained to be small, and when the machine unit is in a load down stage, the aperture of the water feeding main adjusting valve is maintained to be large. Simultaneously certain load space can be generated by control of two clamped curves during load up and load down, and frequent aperture changing of the water feeding adjusting valve caused by small load fluctuation can be avoided. The rotating speed of the frequency converter can be lower, the current is small, the output frequency of the frequency converter is in the adjustable and economical range, and energy consumption of the frequency converter is reduced.

The invention discloses a coal-fired power generation and waste heat power generation coupling system for a private station of a cement kiln, comprising a coal-fired boiler, a kiln head waste heat boiler, a kiln tail waste heat boiler, a kiln head steam pocket, a kiln tail steam pocket, a condensing steam turbine, a condensate pump, a heater, a deaerator, a water feeding pump and related auxiliary devices, wherein the kiln head waste heat boiler utilizes a dual-pressure system; a primary economizer of the low-pressure system is used as a public economizer for the waste heat power generation; the high-pressure steam and the steam generated by the kiln tail waste heat boiler are collected to the main steam pipeline of the waste heat power generation system; one path of the main steam pipeline is connected with a steam turbine of the waste heat power generation system while the other path thereof is connected with non-adjustable extraction steam of a coal-fired steam turbine; one path ofthe main steam pipeline of the coal-fired unit is connected with the coal-fired steam turbine while the other path thereof is connected with the waste heat steam turbine. In the invention, the coal-fired power generation is rationally coupled with waste heat power generation system so that the problem that the stability of the waste heat power generation system of the cement kiln is low is solved, and the whole thermal circulating efficiency of the private station can be largely increased.

The invention relates to a process and a device for recovering and recycling protective gas of a bell-type bright annealing furnace. The process comprises the following steps of: performing cooling and condensation of oil and gas in refluxing protective gas of a bell-type bright annealing furnace group; allowing the cooled and condensed protective gas to enter a water separator to remove most of water and oil; allowing the cooled protective gas from which the oil and the gas are removed to enter a preceding stage buffer tank; after the protective gas is buffered by the preceding stage buffer tank, pressurizing by using a roots blower; allowing the pressurized protective gas to enter an oil absorption device to remove oil and enter a deaerator to remove oxygen; reacting in the deaerator to generate water and discharge heat; cooling the protective gas by using a cooler and removing water from the protective gas by using a condenser; allowing the cooled and dehydrated protective gas to enter the water separator to separate water; allowing the protective gas to enter an absorption regeneration drying device for removing water and impurities deeply; and performing decompression and voltage stabilization on the purified gas by using a post-stage buffering tank and then supplying the purified gas to the bell-type bright annealing furnace group. Through the process and the device, the refluxing protective gas of the bell-type bright annealing furnace group is recovered and purified and enters the annealing furnace to be recycled as the protective gas again.

The invention discloses an abundant generating system used in dry cement product line, comprising a grog cooler, a AQC abundant heat boiler, a cement rotary furnace, a head frame of cement rotary furnace, a third-stage wind tube, a cement preheating device, a cement predissociation furnace, a SP abundant heat boiler, a fan, a deaerator, a condenser, and a generator of turbine. The third-stage wind tube is between the head frame and the predissociation furnace. The head frame is communicated with the grog cooler. The invention is characterized in that third-stage wind tube is arranged with a third-stage wind abundant-heat boiler with bypass wind channels; the medium inlet of the third-stage wind abundant-heat boiler via the tube is connected with the AQC abundant-heat boiler and the SP abundant-heat boiler, while the medium outlet is connected with the turbine generator. The invention can completely absorb the abundant heat of product line, to supply overheated steam to the generator, while the electricity generation is higher than 40kwh.

The invention provides a control method for a steam thermal system with dual-machine backheating steam extraction. When the pressure of a deaerator is lower than the steam extraction pressure at a heat supply steam extraction port of a deaerator on a main steam turbine, a first steam extraction control valve is opened; when the pressure of the deaerator is higher than the steam extraction pressure at the heat supply steam extraction port of the deaerator on the main steam turbine, the first steam extraction control valve is closed and a steam exhaust control valve is opened. According to the control method, the deaerator is connected with a small steam turbine exhaust pipe and a heat supply steam extraction port of the deaerator on a large steam turbine respectively; through controlling the switches of corresponding control valves, on one hand, synchronisms of the pressure of the deaerator and the steam extraction pressure at the heat supply steam extraction port of the deaerator on the large steam turbine under different running conditions are ensured, and on the other hand, the balance of backheating steam extraction flow is achieved on the premise that the output balance between the small steam turbine and the system auxiliary equipment is ensured. Therefore, by adopting the control method, the balance of the backheating steam extraction flow is ensured, and the small steam turbine is enabled to work safely and stably for a long time.

The invention discloses a board slot combined solar energy and thermal power station complementary generating system which comprises a coal-fired boiler, a steam turbine, a generator, a condenser, a condensate pump, an oil-water heat exchanger of a low-pressure solar feed water heater, a flat-plate solar collector, a first parabolic trough type solar collector, a deaerator, a high-pressure water pump, an oil-water heat exchanger of a high-pressure solar feed water heater and a second parabolic trough type solar collector, wherein the steam turbine comprises a high-pressure cylinder, an intermediate-pressure cylinder and a low-pressure cylinder; high-temperature and high-pressure steam generated in the coal-fired boiler does work by expansion in the high-pressure cylinder, the intermediate-pressure cylinder and the low-pressure cylinder of the steam turbine to drive a generator to rotate and output an electrical load externally. The generating system can be used for realizing the capacity expansion and consumption reduction of thermal power stations and solving the problem that the solar energy is unstable and discontinuous, and is beneficial to low-cost transformation of the thermal power stations and large-scale application and popularization of a solar energy technology.

The invention provides a comprehensive utilization method of thermal power plant boiler wastewater. The comprehensive utilization method comprises the following process steps: (1) continuous boiler wastewater goes into a continuous blowdown flash tank for reduced-pressure flashing; secondary steam generated after flashing is guided out of the upper part of the continuous blowdown flash tank and into a deaerator; (2) the hot wastewater at the bottom of the continuous blowdown flash tank is guided into a boiler periodic blowdown flash tank for further reduced-pressure flashing together with regular boiler wastewater; (3) the secondary steam generated by flashing from the periodic blowdown flash tank serves as a heat source and is guided into a low-temperature multiple-effect evaporator group, and bottom salt-containing wastewater also goes into the low-temperature multiple-effect evaporator group as the evaporated liquid; (4) the condensed water generated by the low-temperature multiple-effect evaporator group and the steam condensed water out of a cooler are collected to a condensed water tank by use of a condensation header and then fed into a boiler water supply system by use of a condensed water pump to be recycled; a thickened liquid generated by performing multiple-effect evaporation on the salt-containing wastewater is recycled into a thickened liquid recovery tank and then fed into a wet boiler flue gas desulphurization system used as a desulfurizing agent for desulphurization.

The invention relates to the technical field of low-temperature exhaust heat power generation at low temperature, in particular to a self-coupling cold source heat pump circulating device of a low-temperature exhaust heat power generating system in the low temperature exhaust steam condensation process. The self-coupling cold source heat pump circulating device comprises a conventional low-temperature exhaust heat power generating heat circulation system, a heat pump type condenser which is arranged parallel with a water-cooled condenser is arranged at an exhaust steam outlet of a lower pressure cylinder of a steam turbine; a gaseous state working medium outlet of the heat pump type condenser is divided into three paths which respectively pass through a heat pump system compressor, wherein a first path passes through a heat pump condensed water heater, a second path passes through a heat pump deoxidized heater and a third path passes through a heat pump water feeding heater and then returns to a liquid state working medium input of the heat pump type condenser; the heat pump water feeding heater is arranged between a condensing water pump and a deaerator; the heat pump deoxidized heater is arranged on the deaerator; and the heat pump water feeding heater is arranged at a water feeding inlet of a water feeding pump and an exhaust heat boiler. The invention substantially improves the exhaust heat utilization efficiency of the low-temperature exhaust heat power generating system and enables the system to produce more power energy under the condition that exhaust heat sources are the same.

The invention relates to a preparation method of more stable vitamin A microcapsules, comprising the following steps of: firstly, preparing a vitamin A oil solution containing an antioxidant from vitamin A and the antioxidant in the absence of oxygen, adding chitosan and stirring evenly, after stirring fully, filtering and removing the chitosan to obtain the vitamin A oil solution; adding octenyl succinic acid modified starch to purified water deaerated by a thermal spray deaerator, heating for dissolution; mixing the prepared octenyl succinic acid modified starch solution and the vitamin A oil solution in a certain proportion, emulsifying quickly by an on-line emulsifying machine, and instantly cooling by a cooler; and performing hot air spray drying on the emulsion to obtain stable vitamin A microcapsules. The storage life of the product prepared in the invention reaches two years.

A fuel delivery system for an energy conversion device includes a fuel deoxygenator and an oxygen scavenger module for removing dissolved oxygen and increasing the usable cooling capability of a fuel. Fuel emerging from the fuel-deoxygenating device flows into the oxygen-scavenging module where a second portion, smaller than the first portion of oxygen is removed from the fuel. The combination of the oxygen scavenger and the fuel deoxygenator provides an increase in removal of dissolved oxygen relative to the use of either device alone. The combination provides the desired increase in deoxygenation of fuel without the corresponding increase in device size.

The invention relates to a pure medium-low temperature waste heat generating system in a cement kiln. The invention is characterized in that an AQC boiler is arranged at the kiln head to generate low-temperature low-pressure steam; an SP boiler is arranged at the kiln tail to generate low-temperature low-pressure steam; the low-temperature low-pressure steam generated by the two waste heat boilers are mixed by a steam distributor and then goes into a common high-temperature superheater arranged in the front end of a grate cooler at the kiln head, the low-temperature low-pressure steam generated by the AQC boiler and the SP boiler is superheated into high-temperature high-pressure steam and then goes into a condensing steam turbine, the dead steam after the action of the steam turbine goes into a condenser, condensation water goes into a vacuum deaerator through a condensation water pump and a pipeline to deoxidize, and the deoxidized water goes into the AQC boiler and the SP boiler through a boiler feed pump. By reasonably using the waste steam temperature in the cement kiln and carrying out the cascading use of the waste steam heat based on the temperature, the invention reduces or avoids the entropy phenomena, and enables the temperature of the superheated steam at the inlet of the steam turbine to be raised, thereby realizing the pure medium-low temperature waste heat generating system in the cement kiln, of which the generating capacity is improved.

The invention provides a dual-machine regenerative steam extraction steam thermodynamic system. In the system, the intermediate stage of a high pressure cylinder of a main steam turbine is provided with a high pressure steam extraction opening, the high pressure steam extraction opening is respectively connected with a steam inlet of a small steam turbine and one high pressure heater with the highest steam inlet parameter in a plurality of high pressure heaters through high pressure steam extraction pipelines, the intermediate stage of the small steam turbine is provided with a plurality of regenerative steam extraction openings which are connected with the rest high pressure heaters except the high pressure heater with the highest steam inlet parameter through regenerative steam extraction pipelines, and a steam exhaust port of the small steam turbine is connected with a deaerator through a steam exhaust pipeline of the small steam turbine. According to the system disclosed by the invention, a high-temperature preposed steam cooler can be omitted, and the feed-water temperature of a boiler is reduced, which helps to improve the efficiency of the boiler and reduce the heat consumption of a machine set; and flow loss can be effectively reduced, the circulation efficiency is improved, and the cost of equipment is reduced.