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

The invention dislocates a method and a system for jointly desulfuration denitration and demercuration by activated coke of a moving bed. The method comprises the following steps of: S1, adding activated coke to a desulfuration demercuration reactor and a denitration demercuration reactor respectively, carrying out desulfuration, denitration and demercuration on smoke, and respectively measuring the SO2 and NOx concentrations and the smoke flow at a smoke inlet; S2, calculating the mass flow of the activated coke required for realizing the target desulfuration and denitration efficiency, and adjusting the real-time mass flow of the flowed and reacted activated coke; S3, sieving out the dust attached by the reacted activated coke and the carbon power generated by self-abrasion; S4, charging the sieved activated coke into an activated coke regenerating reactor to be reacted to obtain regenerated activated coke; and S5, adding the regenerated activated coke into the desulfuration demercuration reactor and the denitration demercuration reactor respectively, and carrying out the circulation of desulfuration, denitration and demercuration. The method can be used for timely adjusting the inflow and outflow mass flow of the activated coke of the desulfuration demercuration reactor and the denitration demercuration reactor, and removing mercury in the smoke.

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.

Disclosed is an optimal regulation method for the opening degree of vanes of a circulating water pump. Pipeline characteristics of unit operation are worked out, working points and economy conditionsof a unit circulating water system under various work conditions are computed according to performance characteristics of the circulating water pump, and the power consumption of the water pump is made to be the minimum within a reasonable range of the vacuum degree of a condenser by regulating the opening degree of the vanes of the pump, so that the purposes of cold side optimization and energy conservation are realized.

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 discloses a flue gas recirculating temperature-regulation system of a novel double reheating power station boiler and relates to a regulation system for regulating the main steam temperature, the single reheating steam temperature and the double reheating steam temperature of a double reheating power station boiler which is used by a thermal power station. The system comprises a temperature-regulation flue-air injector set, a temperature-regulation flue-air header, a temperature-regulation flue-air duct, a temperature-regulation air-flue ejector, an ejector flue gas suction side shutoff baffle plate, an ejector thermal primary air regulation baffle plate, a thermal primary air duct and a distributed control system (DCS), wherein the primary air regulation baffle plate is opened when the boiler load is lower than 70% of the boiler maximum continuous rating (BMCR), and the weight flow of a temperature-regulation flue-air mixture is adjustable within a range of 0-15% of the BMCR flue gas weight flow. By the aid of the system, the problem that the double reheating steam outlet temperature is difficult to reach the designed value under working conditions of 50%-60% of the BMCR when a flue gas recirculating fan is not used in the prior art is solved, the energy consumption required for flue gas recirculating temperature-regulation is greatly reduced, the infrastructure investment is saved, the plant electrical consumption is saved, the system is wear-resistant, and operation and maintenance costs are saved.

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 discloses SCR (Selective Catalytic Reduction) denitration reducing agent urea pyrolysis heat source supply method and device, belonging to the field of preparing an NOx denitration reducing agent. The method comprises the steps of arranging a heat exchanger at a boiler flue gas area, and heating primary hot air which is introduced into the heat exchanger to the pyrolysis temperature of urea by utilizing the boiler flue gas of the area. The device comprises the boiler flue gas area with flue gas temperature of 400-900 DEG C, a device capable of generating primary hot air in the boiler, and an urea pyrolysis reactor, wherein the heat exchanger is arranged at the boiler flue gas area, the heat exchanger is connected with the device capable of generating primary hot air in the boiler, and used for introducing the primary hot air to be heated by flue gas of the boiler flue gas area, and the primary hot air heated by the heat exchanger is introduced to the urea pyrolysis reactor. The invention relates to an SCR denitration reducing agent urea pyrolysis heat source supply method and device which are lower in the energy consumption and running cost of the urea pyrolysis technique.

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 relates to an operational control method of a circulating water heat supply unit. The method includes: monitoring parameter variation and controlling the unit; monitoring parameter variation of a lower-pressure cylinder part of a turbine by comparing the parameters under high-back-pressure heat supply with those under pure condensation; controlling heat supply network parameters, controlling a pneumatic circulating water pump, controlling low-pressure differential expansion, and controlling middle-pressure steam discharge parameters. By the reasonable steps of the method, operational control of the high-back-pressure circulating water heat supply unit is achieved to solve the problems that related methods are complex in operation and high in implementation cost and overcome the defects of high investment cost, low energy-saving and economical benefits, poor field technical modification adaptability and poor safety reliability, and the requirements of actual conditions can be satisfied.

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 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 a control system for a low pressure main throttle valve stroke test of a small turbine. A low pressure main throttle valve is composed of an emergency trip protection system and an electro-hydraulic control system. The low pressure main throttle valve includes a full open stroke switch, a full closed stroke switch and a 75% stroke position stroke switch. A normally open contact of a wait-to-restore intermediate relay of a control cabinet of the emergency trip protection system is connected with a power source and a low pressure main throttle valve opening key circuit. Arestoration condition is added in control logic of the electro-hydraulic control system. The restoration condition is that a pulse signal is added when starting the test and closing the low pressuremain throttle valve, wherein logic OR operation is performed on the pulse signals and low pressure main throttle valve test in-place; if one condition is met, a low pressure main throttle valve closing command is restored and a low pressure main throttle valve opening command is sent after logic AND operation on the low pressure main throttle valve closing command after time delay disconnection. Therefore, tripping of a pump due to a fact that the 75% stroke position stroke switch cannot reflect throttle valve position signals accurately can be prevented.

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 relates to a primary wind speed leveling method, which mainly comprises the following steps that when a surveying rod of a Pitot tube or backrest tube for measuring dynamic pressure is produced, an intermediate point is taken as a representative point, a dynamic pressure expected value of the representative point is calculated by a test, the adjustment is carried out in accordance with the dynamic pressure expected value, and the test adjustment and measurement frequency can be reduced, so that a lot of repeated work can be avoided, and thus the test time is reduced, and the leveling test quality is improved.

The invention discloses a hot-state flushing system for a boiler system and the boiler system. The boiler system comprises a boiler, wherein the boiler comprises a boiler water-cooling wall; and watervapor obtained by heating through an adjacent boiler is introduced into a boiler water-cooling wall of a to-be-started boiler to subject to hot-state flushing. According to the hot-state flushing system for the boiler system and the boiler system disclosed by the invention, water vapor obtained by heating through the adjacent boiler is introduced into the boiler water-cooling water of the to-be-started boiler to subject to hot-state flushing, so that steps of igniting the boiler and starting various auxiliary machines in the prior art are avoided, and a step of continuously feeding water to the boiler through a water feeding pump of the boiler is avoided. The method and the boiler system disclosed by the invention improve hot-state flushing efficiency, reduce great water consumption in aboiler starting process, reduce electric consumption and oil consumption of various auxiliary machines, reduce starting time, reduce production cost, and reduce energy consumption of the boiler. The boiler system disclosed by the invention is simple, and is convenient to maintain.

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 arrangement and operation mode of wind driven generators at the top of a power plant boiler. The arrangement and operation mode comprises four H-shaped wind driven generators, two first Y-shaped wind driven generators, two second Y-shaped wind driven generators, power transmission lines and a boiler plant roof; the arrangement scheme of the H-shaped wind driven generators comprises the H-shaped wind driven generators, the power transmission lines and the boiler plant roof; the arrangement scheme of the Y-shaped wind driven generators comprises the first Y-shaped wind driven generators, the second Y-shaped wind driven generators, the power transmission lines and the boiler plant roof; and all the wind driven generators are directly installed on the boiler plant roof and connected through the power transmission lines. According to the arrangement scheme of the two wind driven generators, the height advantage of the power plant boiler is utilized, a too high tower is not needed, strong wind energy at the high position is converted into electric energy, the generated electric energy can be directly connected into a power grid through a power transmission and transformation system of the power plant, and the economical efficiency of the power plant is greatly improved.

The present invention provides a heating device of and a heating method for a large shafting component for a wind driven generator and a shafting assembling method. The heating device comprises: a flexible heating membrane configured to be coated on a surface of a to-be-heated member; a vacuumizing system configured to vacuumize the flexible heating membrane in the case that the flexible heating membrane is hermetically coated on the to-be-heated member; and a control unit configured to control the heating operation of the flexible heating membrane and the operation of the vacuumizing system. The technical solution of the present invention solves the assembling quality problem caused by uneven heating in the traditional heating method and assembling method, and is more energy-saving and environment-friendly.

The present invention relates to a chemical ultrafiltration water production system equipment and a control method thereof. The equipment includes: at least one ultrafiltration raw water tank for providing water source; multiple ultrafiltration water production pumps connected to at least one ultrafiltration raw water tank, multiple One ultrafiltration product water pump is set in a sequential start-stop mode, and multiple ultrafiltration product water pumps are used to pump out the water source in at least one ultrafiltration raw water tank; multiple ultrafiltration devices are electrically connected to multiple ultrafiltration product water pumps. The quantity of one ultrafiltration product water pump is greater than the quantity of multiple ultrafiltration devices, and multiple ultrafiltration devices are used to control the start or stop of multiple ultrafiltration product water pumps and receive and filter water sources. When any ultrafiltration device in multiple ultrafiltration devices The filter device is started, and a signal is sent to control multiple ultrafiltration product water pumps to start one of the ultrafiltration product water pumps in sequence. The invention can intelligently adjust the number of ultrafiltration water production pumps operating according to the number of ultrafiltration devices in operation, and make multiple ultrafiltration water production pumps active and standby each other, so that the automatic standby rate, equipment fault tolerance and utilization rate are greatly improved.

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.

The invention discloses a biomass boiler feeding system, and belongs to the field of biomass boilers. According to the biomass boiler feeding system, the bottom of a stock bin and a secondary spiral feeder are installed in a communicating and matched mode, the secondary spiral feeder and a feeding pipe are installed in a communicating and matched mode, the feeding pipe and a discharging pipe are installed in a communicating and matched mode, the discharging pipe and a hearth are installed in a communicating and matched mode, an air bellow is installed in a communicating and matched mode with the feeding pipe and the discharging pipe, a pneumatic quick shut-off valve, a heavy hammer type lever valve and a metal expansion joint are sequentially installed on the feeding pipe in a matched mode from top to bottom, a fluidization air bellow is installed at the bottom of the discharging pipe in a matched mode, the fluidization air bellow and an air bellow communicate and are installed in a matched mode, and the air bellow and a draught fan are installed in a matched mode. The biomass boiler feeding system aims to solve the problem that a unit cannot run for a long period due to material blockage, shaft breakage and shaftless spiral breakage of a stokehole feeding system of a power plant in the current biomass industry, reduce the labor intensity of operators, save electricity and reduce the production cost, the one-time investment cost, the repeated investment cost and the maintenance cost are saved, and meanwhile the target of long-period operation of the unit is achieved.

The invention discloses a thermosyphon waste heat power generating system which comprises an integrated condensing, cooling and deaerating device. One end of the integrated condensing, cooling and deaerating device is sequentially connected with a condensing water tank, a water feed pump, a waste heat boiler and a turbine. The other end of the turbine is connected with the integrated condensing, cooling and deaerating device which is vertically arranged in a high position. The integrated condensing, cooling and deaerating device is located above the turbine and the condensing water tank and height of the device meets the condition that the pressure of a condensing water pipe to the condensing water tank is positive. The integrated condensing, cooling and deaerating device exchanges heat directly by phase change to replace the original sensible heat indirect heat exchange, and the cooling water quantity is greatly reduced, so that the device can be probably vertically arranged. Meanwhile, the back pressure of the turbine is effectively reduced. Therefore, the system fits the characteristic of a waste heat power station and overcomes the deficiencies of current systems. The purposes of simple and capable system, small occupied area, investment saving, high efficiency, less auxiliary power, high reliability, low failure rate and the like can be realized.

The invention discloses a control system for a low pressure main throttle valve stroke test of a small turbine. A low pressure main throttle valve is composed of an emergency trip protection system and an electro-hydraulic control system. The low pressure main throttle valve includes a full open stroke switch, a full closed stroke switch and a 75% stroke position stroke switch. A normally open contact of a wait-to-restore intermediate relay of a control cabinet of the emergency trip protection system is connected with a power source and a low pressure main throttle valve opening key circuit. Arestoration condition is added in control logic of the electro-hydraulic control system. The restoration condition is that a pulse signal is added when starting the test and closing the low pressuremain throttle valve, wherein logic OR operation is performed on the pulse signals and low pressure main throttle valve test in-place; if one condition is met, a low pressure main throttle valve closing command is restored and a low pressure main throttle valve opening command is sent after logic AND operation on the low pressure main throttle valve closing command after time delay disconnection. Therefore, tripping of a pump due to a fact that the 75% stroke position stroke switch cannot reflect throttle valve position signals accurately can be prevented.