40results about How to "Save factory electricity" patented technology

The invention discloses a power grid black-start method with participation of regional small hydropower stations and new energy hybrid micro-grids. A process of the method includes selecting black-start micro-grids; selecting the optimal starting paths; starting the micro-grids; charging lines; transmitting power to loads; outwardly expanding and starting started power sources; interconnecting the micro-grids with systems. Energy storage systems in the micro-grids are used as black-start power sources when the micro-grids are started and run in V-F modes, so that voltages can be assuredly generated for buses of the micro-grids; present voltage frequency stability of the micro-grids can be guaranteed by means of invoking active power and reactive power which are outputted by the energy storage systems when the small hydropower stations and photovoltaic systems in the micro-grids are started. The power grid black-start method has the advantages that merits of simple auxiliary equipment, low auxiliary power consumption, high starting speeds and the like of the micro-grids are sufficiently utilized by the power grid black-start method, the micro-grids are used as the black-start power sources for power grids, accordingly, power failure durations of the power grids can be shortened, and normal running of the power grids can be restored as soon as possible; the power grid black-start method is applicable to black-start of the regional small hydropower stations and the new energy hybrid micro-grids.

The invention relates to a distributed type energy resource flue gas waste heat deep utilization system. The distributed type energy resource flue gas waste heat deep utilization system comprises a gas turbine generator set, a steam turbine generator set, a waste heat boiler and water utilization equipment, and is characterized in that the exhaust end of a gas turbine is communicated with the gas inlet end of the waste heat boiler, the steam output end of the waste heat boiler is connected with the steam inlet end of a steam turbine to form a gas turbine waste heat utilization loop; the steam outlet end of the steam turbine is connected with the water inlet end of the waste heat boiler sequentially by a condenser and a feed pump to form a steam turbine waste heat utilization loop; the waste heat boiler is provided with a hot water exchanger capable of heating moisture; and the high-temperature hot water output end of the hot water exchanger is connected with the input end of the water utilization equipment, and the low-temperature hot water return input end of the hot water exchanger is connected with the low-temperature hot water return output end of the water utilization equipment to form a distributed type energy resource flue gas waste heat deep utilization structure. The distributed type energy resource flue gas waste heat deep utilization system has the beneficial effects that the temperature of flue gas exhausted by the waste heat boiler is reduced, the flue gas waste heat can be sufficiently utilized, and the energy utilization rate is high.

The invention discloses a device for starting an intermediate-pressure cylinder device by using neighbor turbine steam in a unitized unit and a starting method of the device for starting the intermediate-pressure cylinder device. The device comprises a native turbine and a neighbor turbine, a steam source is injected to a turbine intermediate-pressure cylinder through a native turbine auxiliary steam header on the native turbine and a boiler reheater connected with the native turbine auxiliary steam header, and the steam source is provided by a neighbor turbine auxiliary steam header communicated with the native turbine auxiliary steam header through a pipeline. The neighbor turbine steam source is connected to the intermediate-pressure cylinder through a pipeline to start the native turbine intermediate-pressure cylinder, a native turbine boiler, a starting fan and an electric feed pump do not need to work, house supply and fuel can be saved, the on-site work of inspecting the quality after an overhaul of the turbines and driving a rotor to rotate is completed, impulse starting, installation quality inspection and no-load tests on an electric part before grid connection of the unit can be carried out ahead of time, running operation and the maintenance workload in the period are reduced, and disharmony between the overall duration of the boiler and the overall duration of the turbines can be relieved, so that energy conservation and consumption reduction are achieved, the unit is high in economy, reliability and utilization ratio, the starting method is easy and convenient, and operation is safe and reliable.

The invention discloses a closed water cooling system with a double-evaporative cooling pressure, which provides the closed water cooling system used in an air-cooled thermal power set. The closed water cooling system comprises a direct-current evaporating and cooling closed water chiller A, a direct-current evaporating and cooling closed water chiller B, a vacuum butterfly valve, a vapor injector A, a vapor injector B, five sections of steam extracting and entering regulating valve, a plant steam aiding and entering regulating valve, a NO. 8 low pressure heater, a condenser, a liquid level sensor and a DCS (distributed control system); pipe sides of the two direct-current evaporating and cooling closed water chillers A and B are connected in series; and an evaporating and cooling pressure at a casing side of B is lower than that of A, thus the problem that output power of a turbo generator set is limited by an overhigh temperature of closed water is solved, cooling conditions of a host machine and an auxiliary machine are improved, heat output by hot closed water is recycled as much as possible, and power consumption of the closed water system is lowered. By the adoption of the closed water cooling system, no wet-type mechanical ventilated cooling tower is needed for open circulated water cooling, the occupation area of the cooling tower is reduced, the investment on capital construction is reduced, the electricity consumption is decreased, and the water consumption is zero.

The invention provides a method and a device for cooling circulating water in a turbine condenser. The device is mainly composed of a condenser and a circulation refrigerant refrigeration device. Theinvention is characterized in that heat absorbing tubes are arranged in an inlet water chamber of a circulating water system of the condenser, heat dissipating tubes are arranged in an outlet water chamber of the circulating water system of the condenser, the heat absorbing tubes and the heat dissipating tubes are connected by a conduit and a compressor to form the circulation refrigerant refrigeration device, the heat absorbing tubes are used for rapidly refrigerating the circulating water in the inlet water chamber and the heat dissipating tubes are used for rapidly dissipating the heat of the circulating water in the outlet water chamber. The invention solves the problem that higher temperature of the circulating water of the condenser causes the efficiency of the turbine to be reduced,thus being suitable for all the thermal power systems.

The invention provides a water feeding method used during unit starting. The water feeding method comprises the steps that when the unit is started in a cold state (or a warm state), the unit is started without a condensate water pump, specifically, a deaerator does not perform water feeding using the condensate water pump, but performs water feeding using a boiler feedwater pump, and the condensate water pump is started until a condenser is vacuumized before a boiler is ignited; when the unit is started in the cold state (or the warm state), the unit is started without an electric feedwater pump, specifically, firstly, the boiler is subjected to water feeding using a deaerator pressurizing method, that is, a static pressure water feeding method; secondly, after adjacent furnace heating iscarried out, a front-arranged pump is used for feeding water; the condensate water pump is started; after the boiler is boosted, a steam pump is used for feeding the water; the rotation speed of a steam-driven feedwater pump is gradually accelerated; the unit starts steam source switching of middle and small steam turbines; when the unit is started in a thermal state (or an extreme thermal state), a high-pressure assisted steam source is directly used for charging the small steam turbine, and a steam-driven main feedwater pump is started to perform water feeding on a boiler steam dome; and the unit is started without the condensate water pump or the electric feedwater pump in the cold state, the unit is started without an electric pump in the thermal state for feeding the water, and the security and economy in the starting process of the unit are improved.

The invention provides a jet flue gas recycling method for preventing spray opening burning loss of a secondary reheating boiler and relates to a method for adjusting main steam temperature, primary reheating steam temperature and secondary reheating steam temperature of a secondary reheating power plant boiler capable of being used by a thermal power plant safely and economically for a long time. According to the method, a temperature-regulating flue wind spraying nozzle set, a temperature-regulating flue wind connection box, a temperature-regulating flue wind duct, a temperature-regulating wind-flue ejector, an ejector flue gas suction side closing baffle, an ejector heat primary wind adjusting baffle, a heat primary air duct, a multi-hole switch type throttling baffle and a DCS control system are included. By means of the method, the problems that in the prior art, a temperature-regulating system of the secondary reheating power plant boiler does not use a furnace flue recycling fan, and it is difficult for the temperature of a secondary reheating steam outlet to reach the design value under the work condition of 50%-65% BMCR are solved, the distribution uniformity of primary air for cooling in all temperature-regulating flue wind spray nozzles is remarkably improved, and it is guaranteed that the jet flue gas recycling system can operate safely and economically for a long time.

The invention discloses a novel rotation stepped heat storage type air preheater. A center barrel, a stepped phase change heat storage rotor and the like are included. During work, the center barrel is driven by an outer drive device and rotates together with the stepped phase change heat storage rotor. Denitration smoke and air sequentially flow through a stepped phase change heat storage rotor flowing channel, and heat is transferred to air from smoke through a stepped phase change heat storage unit. Since phase change heat storage materials are adopted in the novel rotation stepped heat storage type air preheater for heat storing and releasing, the phase change temperature of each level of phase change materials is gradually reduced in the smoke flow direction, during actual running, temperature gradients cannot happen to the rotor in rotation direction, in other words, all levels of phase change energy storage units are consistent in temperature, accordingly, the rotor heat state deformation drooping volume in the rotor ring direction is the same, and favorable conditions are provided for work of a fan-shaped plate adjusting mechanism. The novel rotation stepped heat storage type air preheater has the advantages that the air leakage rate is low, drive equipment power consumption is low, rotor temperature distribution is uniform, and the heat storage capability is high; andcompared with a traditional rotation type air preheater, the heat exchange efficiency of the novel rotation stepped heat storage type air preheater is improved.

The invention discloses an energy-saving synergistic anti-blocking method and system based on an air preheater bypass flue. The energy-saving synergistic anti-blocking method based on the air preheater bypass flue includes the steps that air is heated to the temperature higher than the smoke acid dew point temperature through bypass hot flue gas, then the air is conveyed to the cold end of an airpreheater, and the air independently flows through a heat storage element so as to prevent the heat storage element from being blocked by dust. According to the method, the air is heated through the bypass hot flue gas to prevent blocking, so that the defect of blocking prevention through hot air circulation in the prior art is effectively overcome. The method has the remarkable advantages that the smoke discharging temperature is reduced, the power consumption of a factory is reduced, and the maintenance workload is reduced. Furthermore, the related problems such as zero emission of desulfurization wastewater and desulfuration of a chimney are also solved, the collaborative effect is generated, the total investment cost is reduced, and the operation safety, environmental protection performance and economical efficiency of a boiler air and flue gas system are improved. The energy-saving synergistic anti-blocking system based on the air preheater bypass flue is small in operation energyconsumption, stable and reliable in operation, small in maintenance workload and good in the air preheater anti-blocking effect.

The invention provides a device and method utilizing start-up system drained water as a heating source of an air heater. The device comprises two connecting paths connected between a start-up system water storage tank and a flash vessel; according to one connecting path, the start-up system water storage tank is connected with the flash vessel through a water storage tank body and an air heater by-pass valve; according to the other connecting path, the start-up system water storage tank is connected with water inlets of both a primary-air air heater and a secondary-air air heater through the water storage tank body and an air heater valve correspondingly, and water outlets of both the primary-air air heater and the secondary-air air heater are connected with the flash vessel through an airheater back-water valve; a primary fan is connected with an air inlet of the primary-air air heater, a secondary fan is connected with an air inlet of the secondary-air air heater; and air outlets ofboth the primary-air air heater and the secondary-air air heater are connected with an air preheater. According to the device and method utilizing start-up system drained water as the heating sourceof the air heater, heat discharged by a start-up system can be effectively utilized, the heat loss is reduced, and the primary air temperature and the secondary air temperature are increased; and combustion of a boiler can be enhanced, and secondary burning and low-temperature corrosion of a train flue of a unit and the air preheater can also be weakened and avoided.

The invention discloses an arrangement structure of a pneumatic water supply pump set and method. The pneumatic water supply pump set is arranged in a steam engine room of a power plant, the pneumatic water supply pump set comprises a water supply pump turbine, a primary water supply pump, a water supply booster pump and a speed regulation device, and a zero meter layer, an interlayer and an operating layer are arranged in the steam engine room. The pneumatic water supply pump set further comprises a power generator, and the power generator and the water supply pump turbine are arranged coaxially. The primary water supply pump and the water supply pump turbine are arranged in the operating layer, and the water supply booster pump is arranged in the zero meter layer. The power generator is connected with the water supply pump turbine through the speed regulation device, and the power generator provides power for the booster pump to drive the water supply booster pump. According to the arrangement structure of the pneumatic water supply pump set, the power generated by the power generator drives the water supply booster pump which is arranged at a low position, and the auxiliary power is saved. A deaerator is arranged at a relative low position, and the primary civil engineering investment is saved. In addition, the operating layer can be very conveniently used for carrying out maintenance on equipment, and smooth drainage of a steam discharge pipe of the water supply pump turbine is guaranteed at the same time.

The invention discloses a vacuum energy vortex steam condenser which comprises a cylindrical vortex generating chamber, wherein a condensate collecting chamber is communicated with the lower part of the vortex generating chamber, a vacuum pump is connected with the upper end of the vortex generating chamber through a vacuum pipe, a spout is formed on the side wall of the vortex generating chamber and tangential to the generatrix of the inner wall of the vortex generating chamber and used for injecting the steam exhaust from a steam turbine, a condensate pump is connected with the lower end of the condensate collecting chamber through a condensate delivery pipe, the spout is a slit penetrating the vortex generating chamber in the vertical direction, and a wedged nozzle is communicated with the spout. The vacuum energy vortex steam condenser has the advantages of simple operating principle, economic efficiency and applicability, high efficiency and energy saving, safety and reliability, simple construction and installation, convenience for operation and maintenance, stable operation, lower water consumption as compared to a wet cooling unit, higher heat efficiency as compared to an air cooling unit, and lower investment as compared to a wet cooling unit.

The invention discloses a method for predicting blockage of an air pre-heater. The method comprises the following steps: detecting and testing a # 1 machine, an SCR (Selective Catalytic Reduction) denitration system, the air pre-heater and ammonia injection control logic in a targeted manner, and collecting data; transforming a one-way soot blower into a two-way soot blower, arranging a steam pipe for purging oxide skin at each ammonia supply grid, and transforming an air pre-heater soot blowing system and an ammonia supply system of the # 1 machine. Units are detected and tested in a targeted mode, data is collected, the system is optimized and improved, data monitoring, a heat transfer algorithm, ammonium bisulfate characteristics and other elements are effectively combined, an air pre-heater heat transfer model is built, generation of ammonium bisulfate of the air pre-heater in the deep peak regulation period is effectively avoided. Blockage degree of the air pre-heater is accurately predicted by analyzing parameter changes, an operator is assisted to take prevention and control measures in advance, ammonium bisulfate blockage of the air pre-heater is avoided, and safe and economical operation of units is guaranteed.

The invention discloses an anti-corrosion self-compensation low-temperature heat exchanger system for a biomass circulating fluidized bed boiler. The anti-corrosion self-compensation low-temperature heat exchanger system comprises a low-temperature heat exchanger of a coiled pipe structure, a low-temperature steam drum and a channel type air preheater, wherein the low-temperature heat exchanger isconnected with the low-temperature steam drum; the low-temperature steam drum is connected with the air preheater through a saturated steam outlet pipe; the air preheater is connected with the low-temperature heat exchanger through a connecting pipe to form a water circulation loop. The system is provided with the low-temperature steam drum, a natural water circulation way is adopted, working substances flows through a pressure head generated by a steam-water liquid level difference, a circulating water pump does not need to be arranged, and therefore, the anti-corrosion self-compensation low-temperature heat exchanger system has good boiler load change adaptability. A heat adsorption amount is subjected to self-compensation regulation according to the temperature of smoke which enters the low-temperature heat exchanger, and the temperature of outlet smoke is regulated. According to the system, factory power utilization can be lowered, the thermal efficiency of a whole factory is improved, and economical efficiency is improved.