18 results about "Steam turbine" patented technology

The invention relates to an ultra-supercritical thermal generator set coordinated control system, and belongs to the technical field of generator set coordinated control. An intermediate point temperature control system, a main steam temperature control system, a reheated steam temperature control system, an AGC control system and an ammonia spraying control system are all connected with a DCS module through a corresponding optimized system model controller. A separator outlet mean temperature value module, a separator outlet temperature setting module, a unit load module, and a separator temperature-to-coal-water ratio value correcting module are all connected with the DCS module through the optimized system model controller. The ultra-supercritical thermal generator set coordinated control system is simple in structure, reasonable in design and convenient to use, the purpose of coordinating unit loads is achieved by controlling output force of a boiler and a steam turbine, and the purposes of improving the unit load response speed and precision are achieved through a series of advanced algorithms.

The invention relates to a device for thermal treatment after welding of a partition board of a steam turbine, the partition board comprises an inner ring, a static blade and an outer ring, special devices comprise a bolster, filler blocks, a pressure plate and screws of the pressure plate, wherein the bolster is arranged below the partition board, n screw holes are formed in the positions of the inner side of the inner ring of the partition board and the outer side of the outer ring along the circumferential direction, wherein n is a natural number; the filler blocks are arranged on the bolster and comprise the outer ring filler block and the inner ring filler block, and the outer ring filler block and the inner ring filler block are respectively positioned below the outer ring and below the inner ring of the partition board. The device can achieve the purposes of eliminating the welding stress of the partition board while fully ensuring the size of the partition board, avoid ultra-poor products, lead the primary qualified rate to be 100% and bring great economic benefits for enterprises.

The invention discloses a steam waste heat gradient utilization system for a carbon capture absorbent regeneration system. A reboiler in the steam waste heat gradient utilization system is communicated with a low-pressure cylinder of a steam turbine through a low-pressure supersaturated steam supply pipeline, a temperature reducing unit cools low-pressure supersaturated steam, the reboiler is communicated with a low-pressure flash evaporation unit through a condensed water supply pipeline, the low-pressure flash evaporation unit is communicated with a low-temperature multi-effect distillationunit through a low-temperature steam supply pipeline, and condensed water in the low-pressure flash evaporation unit returns to a steam-water circulation system of a waste heat boiler at the temperature of 70 DEG C or below. According to the invention, under the condition that carbon capture is carried out, seawater desalination or high-salinity wastewater treatment is carried out by utilizing thewaste heat of the capture unit, the natural gas-steam combined cycle-CO2 capture unit energy gradient utilization is achieved, meanwhile, co-production is achieved, the overall economy is improved, the temperature of condensate water returning to a steam-water circulation system of the waste heat boiler is reduced, and then flue gas waste heat in a waste heat boiler system is fully utilized.

A steam turbine (10) comprising a turbine body that has a rotatably supported blade, a steam flow path connected to the turbine body through which steam flows, a regulating valve that regulates, by linear motion, the opening and closing of the steam flow path, an open-close driving mechanism (15) that drives the regulating valve, an electronic governor (17) that controls at least the open-close driving mechanism, and a controller unit (35) that controls the operation of the open-close driving mechanism, wherein the open-close driving mechanism comprises an electric motor (26) that rotates by electrical power being supplied, a converting mechanism that converts the rotary motion of the electric motor to linear motion of the regulating valve, and a brake (28) that brakes the rotary motion of the electric motor by way of being operated, and at least one of the controller unit and the electronic governor performs control to operate the brake when at least one of the electric motor and the controller unit fails and maintain the position of the regulating valve.

The invention discloses an integrated monitoring system for a power station steam turbine electric hydraulic control system based on a Modbus protocol, which relates to an automatic control system for generating station unit equipment and particularly relates to a Modbus protocol-based power station equipment DCS (Distributed Control System) integrated monitoring system. The system of the invention is composed of a steam turbine electric hydraulic control system, a unit DCS control system and a data communication network, wherein the data communication network comprises an EHCS (Electric Hydraulic Control System)-side communication interface station and a DCS-side communication interface card; the EHCS-side communication interface station is interconnected with the DCS-side communication interface card via a serial converter. Data communication is realized through the Modbus protocol, the unit DCS control system executes a monitoring operation process on the steam turbine electric hydraulic control system through an operator station, monitoring and operation on all important parameters and equipment of the steam turbine electric hydraulic control system are completed, the training workload and the maintenance workload of an operator can be greatly reduced, and the technical problems of not high information and data sharing degree between the power station steam turbine electric hydraulic control system and the unit DCS control system which are mutually independent and have different regulations and low system integration degree can be solved.

The invention discloses an energy storage peak load regulation system taking air as a medium, and the system comprises a first steam turbine generator set, an energy storage unit and a second steam turbine generator set. When a power grid needs a coal-fired generating set to participate in peak load regulation to reduce the on-grid electric power, the electric energy generated by the first steam turbine generator set is stored by the energy storage unit; when the coal-fired generating unit is required to increase the amount of on-grid electricity, the energy storage unit outputs the stored energy to the second steam turbine generator set for work and power generation so that the power is integrated into the power grid. During the valley of on-grid electricity price of the peak load regulation, an air compression storage system is activated to compress and store air, and the power of the coal-fired generating unit is consumed to reduce the amount of on-grid electricity. During the peakdemand of the grid and the peak of electricity price, the air compression storage system is activated to supply electricity to the outside. The system is matched with and adapts to the peak load regulation policy of the power grid, and utilizes the peak-to-valley difference of electricity price to improve the profitability of the unit.

The invention relates to a steam turbine condenser. According to the technical scheme, an air cooling area arrangement method of a large-length-diameter-ratio lateral steam admission condenser comprises the steps that (1) part areas, close to pipe plates at the two ends, of part of or all heat exchange pipes are surrounded by baffles to form two air cooling areas, and the air cooling areas are located on the side away from a steam inlet of the condenser; each air cooling area is provided with an extraction opening which is used for extracting a gas-steam mixture in the condenser outwards; (2) a distance is kept between one side edge of each baffle and the inner wall of a circumferential shell of the condenser, so that an inlet for the gas-steam mixture to enter each air cooling area is formed; the other side edges of each baffle are in sealed connection with the inner wall of the condenser and middle partition plates respectively; and (3) a distance is kept between the periphery of each middle partition plate and the inner wall of the circumferential shell of the condenser and serves as a channel for the gas-steam mixture to flow to each air cooling area. The lateral steam admission condenser manufactured according to the method has the characteristics of being high in heat exchange efficiency, low in energy consumption, simple in structure and low in manufacturing cost.

The invention relates to the field of steam engine devices, in particular to a combined power generation system for high-efficiency low-temperature and low-pressure steam waste heat utilization and a control method thereof. The control method comprises the steps that: waste heat steam is introduced into a steam turbine to drive a double-extension-shaft generator to generate electricity; the steam discharged by the steam turbine enters an evaporator to heat a working medium; the working medium expands to drive the double-extension-shaft generator to generate electricity; the working medium circularly flows back to the evaporator after being cooled; the rotating speed of the double-extension-shaft generator is increased to a rated rotating speed; a grid-connected cabinet of the double-extension-shaft generator is closed; and the output power of the double-extension-shaft generator is increased to the rated power for operation. Therefore, energy in the waste heat can be used in a grading manner, and the working efficiency is improved.

The invention discloses a six-direction adjusting supporting device used for assembling a steam turbine stator part and belongs to the technical field of steam turbine stator part assembling. According to the six-direction adjusting supporting device used for assembling the steam turbine stator part, the bottom of a guiding base is provided with a first guide groove in the X direction, and the topis provided with a second guide groove in the Y direction and a third guide groove in the X direction; a lower supporting arm is assembled in the first guide groove; due to a first adjusting mechanism, the guiding base can move in the X direction on the lower supporting arm; an upper supporting arm is assembled on the top of the guiding base; a guiding block is embedded into the second guide groove; due to a second adjusting mechanism, the upper supporting arm can move in the Y direction on the guiding base; a wedge-shaped block is assembled in the third guide groove; the bottom face of the upper supporting arm is pressed on the top face of the wedge-shaped block; and due to a third adjusting mechanism, the wedge-shaped block can move in the X direction along the third guide groove, so that the upper supporting arm moves in the Z direction under the effects of the wedge-shaped block. The six-direction adjusting supporting device used for assembling the steam turbine stator part can achieve relative position adjusting in six directions, and is applicable to assembling of the steam turbine stator part.

The invention relates to a coal-fired unit variable rate load control method based on AGC instruction state change judgment, which comprises the following steps: an instruction receiving device receives a load instruction, generates an AGC instruction, acquires a main steam pressure signal and a generator power signal, and sends the signals to an industrial control computer; and the industrial control computer judges and processes the state of the AGC instruction, adopts different load variable rate strategies on a steam turbine side and a boiler side according to a judgment result, and then performs control operation on unit load and pressure according to a variable rate processing result to generate a control valve opening instruction of the steam turbine. The method has the beneficial effects that the AGC instruction is divided into a stable state and a dynamic state; in a stable state, the characteristic of rapid load adjustment of the steam turbine is exerted, and variable load adjustment is carried out at a high rate; under the dynamic working condition, load response is carried out at a conventional rate, the load regulation performance index of the unit is effectively improved, and the AGC response capability of the unit is improved.

The invention relates to a full-circle assembling method for a crown type grinding-fitting type partition plate of a steam turbine, and the method comprises the following steps that S1, a full-circlepartition plate inner ring is installed on a tool bottom plate, and is pressed through an inner ring pressing device; S2, blades in a full-circle of stator blade set are installed through stator bladeabutting devices one by one, and the maximum gap between the stator blade set and the partition plate inner ring is 0.2 mm; S3, spot welding is conducted on a steam inlet side splash-proof cover plate, stator blades are fixed through spot welding one by one, the splash-proof cover plate is pressed, a partition plate outer ring is heated, and the partition plate outer ring and the stator blade setare in interference of 0.4-0.6 mm; S4, the heated partition plate outer ring is pressed on the tool bottom plate, and after the partition plate outer ring is cooled to the room temperature, an outerring pressing device is removed; S5, a steam inlet side steam channel splash-proof cover plate is turned over and fully welded; and S6, grooves are welded. The full-circle assembling method has the beneficial effects that the partition plate is machined in a full-circle mode, the outer ring and the blades are in interference with each other by 0.4-0.6 mm, gaps between the blades are well eliminated through interference tightening force, full-circle welding machining of the partition plate is conveniently achieved, and the welding efficiency is improved.

An assembly with a steam turbine and an overload valve, wherein the overload valve is arranged opposite the fresh steam valve and a fresh steam flows partially through the flow channel and partially into an overload inflow region via the overload valve.