221 results about "Steam drum" patented technology

The invention discloses a fused salt steam generation system and a control method thereof. A high-temperature molten salt tank, a salt feeding pump, a molten salt channel of a second-stage superheater, a molten salt channel of a first-stage superheater, a molten salt channel of an evaporator, a molten salt channel of a preheater and a low-temperature molten salt tank of the system are communicated in sequence; the water supply end, the water supply pump, a steam-water channel of the preheater, the steam pocket, the pressure regulating valve, a steam-water channel of the first-stage superheater, the water spraying and temperature reducing device, a steam-water channel of the second-stage superheater and the steam removal end are sequentially communicated, and a descending pipe and an ascending pipe of the steam pocket are communicated with a steam-water channel of the evaporator. The control method aims at the system. The method has the advantages that the steam pocket pressure is actively adjusted during load rising, the liquid working medium is flashed, a load instruction can be quickly responded, steam is stably generated according to the instruction and merged into the steam turbine, and the stability and safety of the steam turbine are improved; the steam pocket of the evaporation system is used as steam storage equipment, so that an independent steam storage pocket is prevented from being arranged in the evaporation system, the cost is reduced, and the control logic is simplified.

The invention relates to an intelligent combustion monitoring and rapid intervention control method and system for deep peak regulation of a coal-fired boiler. The method comprises the following steps: reconstructing a two-dimensional temperature field of a hearth through regularization optimization modeling by utilizing hearth infrared measuring point data; constructing a coal quality dynamic identification model to realize dynamic monitoring and trend prediction of coal quality fluctuation; a combustion state nonlinear probability fusion model is constructed, on the basis of a probability graph model, information such as flame detection signals, hearth negative pressure, flame images, oxygen amount, steam drum water level, coke falling and coal interruption is fused, joint probability distribution is constructed, time sequence incremental learning is conducted in combination with an XGBoost model, and dynamic recognition and early warning of the combustion state are achieved. Key parameters such as a flame image, temperature field distribution and negative pressure fluctuation are collected in real time by means of a hearth multi-dimensional combustion state recognition model, a decision module is triggered when a combustion state score reaches an early warning threshold value, a quick oil gun is triggered to be put into use, and early warning in advance is changed into quick intervention.

The invention discloses a thermal power plant boiler fly ash fluidized bed heat storage and release system and a heat storage and release method, and relates to the technical field of electric heat storage. The system comprises a heating fluidized bed, a fly ash heat storage tank and a fluidization heat release tank, the bottom and the top of the fly ash heat storage tank are connected with the bottoms and the tops of the heating fluidized bed and the fluidization heat release tank through hot air circulating pipes respectively, and circulating fans are arranged on the hot air circulating pipes; fluidized bed partition plates are arranged in the heating fluidized bed, the fly ash heat storage tank and the fluidization heat release tank; a water-cooled wall tube is arranged in the fluidization heat release tank, the lower end of the water-cooled wall tube is connected with a water supply and steam pocket downcomer, and the upper end of the water-cooled wall tube is connected with a steam pocket. The coal ash of the thermal power plant is directly used as a heat storage medium to construct a closed-loop heat storage and release process, the coal ash disposal problem is solved, the material cost of the system is reduced, meanwhile, the peak regulation requirement of the power grid is met, resource utilization of the coal ash of the thermal power plant is achieved, the material cost of the heat storage system is reduced, and an efficient heat storage solution is provided for peak regulation of the power grid.

The embodiment of the present disclosure provides a molten salt-based gas-steam combined heat storage system and a capacity calculation method. The system comprises a gas turbine, a boiler, a gas heat exchanger, a steam heat exchanger, a high-temperature molten salt storage tank and a low-temperature molten salt storage tank. The outlet of the gas turbine is connected with the inlet of the flue of the boiler. The gas heat exchanger is connected with the flue between the gas turbine and the high-temperature reheater and the high-pressure superheater in the boiler. The steam heat exchanger is connected with the steam-water pipeline between the high-pressure superheater and the high-pressure drum and the low-pressure drum in the boiler. The low-temperature molten salt storage tank is connected with the high-temperature molten salt storage tank through a molten salt conveying pipeline. The molten salt conveying pipeline is sequentially connected with the steam heat exchanger and the gas heat exchanger. The low-temperature molten salt is heated to high-temperature molten salt when passing through the steam heat exchanger and the gas heat exchanger along the molten salt conveying pipeline. The system realizes reasonable distribution of steam flow and gas flow, significantly improves the heat exchange efficiency of the heat storage heat exchanger, improves the energy storage density per unit mass of the molten salt heat storage system, and reduces the cost.

The invention discloses a gas-steam combined cycle power generation system and method coupled with thermochemical energy storage. Comprising a Ca (OH) 2 / CaO system thermochemical energy storage system, a high-pressure natural gas conveying pipeline, a natural gas differential pressure power generation system, a gas turbine power generation system, a waste heat boiler, a frequency division fluid preheater, a steam turbine power generation system, a water supply preheater, a valve A, a valve B, a valve C, an air preheater and a valve D, the Ca (OH) 2 / CaO system thermochemical energy storage system comprises a reactor body and a steam pocket, the system and the method can deeply integrate thermochemical energy storage, solar full spectrum utilization and pressure energy recovery, and meanwhile, multi-energy coupling and dynamic peak regulation can be achieved.

The invention provides a method, device and equipment for controlling the steam drum water level of a gas-steam combined cycle unit. The method comprises the steps that the opening degree of an inlet guide vane of a gas compressor, the turbine exhaust temperature, the feed water flow, the steam flow, a steam drum water level set value and the steam drum water level are obtained in real time; according to the opening degree of an inlet guide vane of a gas compressor and the exhaust temperature of a turbine, the gas turbine side feed-forward control quantity is determined; according to the steam drum water level set value and the steam drum water level, a first PID controller is adopted to determine an original feed water flow set value; according to the feed water flow, the steam flow, the original feed water flow set value and the gas turbine side feed-forward control quantity, a second PID controller is adopted to determine a first feed water adjusting valve opening instruction; and adjusting the opening degree of the feed water adjusting valve according to the first feed water adjusting valve opening degree instruction, and controlling the steam drum water level of the gas-steam combined cycle unit. According to the invention, reliable guarantee is provided for safe and efficient operation of the unit through a cooperative regulation mechanism of the gas turbine side feed-forward control quantity and three-impulse control.

The invention discloses a sliding pressure operation waste heat recovery system with a dynamic peak regulation integrated heat storage function. An inlet of a flue heat accumulator module group is connected with a flue gas outlet of a waste heat production device, an outlet of the flue heat accumulator module group is connected with a gas phase channel inlet of a heat exchanger module group, and a gas phase channel of the heat exchanger module group is connected with a tail gas treatment device; an outlet of the softened water tank is connected with a liquid phase channel inlet of the heat exchanger module group, a liquid phase channel outlet of the heat exchanger module group is connected with an inlet of the steam pocket module group, outlets of the steam pocket module group and the steam heat accumulator module group are connected with an inlet of the steam distribution cylinder module group, and the steam distribution cylinder module group provides steam for users. Or the steam is fed into the steam heat accumulator module group to be stored, and the electric heater module group is arranged in the steam heat accumulator module group. By fusing the heat storage function and optimizing the sliding pressure efficiency, the problems that traditional waste heat recovery is poor in flexibility, insufficient in peak regulation capacity and the like are solved.

The utility model provides an independent circulation pipeline evaporator which comprises an ascending pipe connected to a steam pocket; the first evaporation screen is communicated with the ascending pipe through a first ascending communicating pipe, the first evaporation screen comprises a plurality of first pipe pieces, and the first pipe pieces are arranged on two flues in parallel; each first duct piece is arranged in a bow shape in the vertical direction, so that the heating area of each first duct piece is increased, and meanwhile, a steam soot blower can penetrate through each first duct piece and carry out decoking and soot cleaning on each first duct piece; the first descending communicating pipe is connected between the first evaporation screen and a descending pipe, and the descending pipe is connected to the bottom of the steam pocket and used for conveying water in the steam pocket to the first descending communicating pipe and then conveying the water to the first evaporation screen. The problems of overtemperature and high-temperature corrosion of the superheater mentioned in the background technology are solved.

This invention provides a steel slag treatment system, including a hot slag annealing device and a roller crushing device. The hot slag annealing device is provided with a hot slag steam outlet. It also includes a steam drum device, which is provided with a steam inlet, a feedwater inlet, a steam outlet, and a water outlet. A hot slag steam channel is provided between the steam outlet and the feedwater inlet. A hot slag annealing water inlet is provided on the hot slag annealing device, and a return water channel is provided between the water outlet and the feedwater inlet. This steel slag treatment system can purify the steel slag steam generated in the hot slag annealing device to obtain clean steam for power generation.

The application discloses a water supply device and a mixed speed regulation control method and device thereof and a storage medium, wherein the water supply device comprises a boiler, a high-pressure heater and a first water supply device and at least one second water supply device connected in parallel, the first water supply device comprises a first water supply pump and a hydraulic coupler, the second water supply device comprises a second water supply pump and a variable frequency motor, the method comprises the following steps: adjusting the rotating speed of the first water supply pump by configuring the scoop pipe opening degree of the hydraulic coupler, and adjusting the rotating speed of the second water supply pump by configuring the operating frequency of the variable frequency motor; heating the pumped water through the high-pressure heater, and conducting convection on the hot water output by the high-pressure heater through the boiler to output superheated steam; acquiring the drum water level of the boiler; determining the target rotating speed according to the drum water level, and determining the scoop pipe opening degree instruction and the variable frequency instruction according to the target rotating speed to control the scoop pipe opening degree of the hydraulic coupler and the operating frequency of the variable frequency motor, so that the drum water level is in a preset water level interval.

The utility model discloses a drip-proof boiler continuous blowdown device, which relates to the technical field of boiler blowdown and comprises a boiler drum and a sealing component, a continuous blowdown regulating valve is arranged in front of the boiler drum, and the sealing component is arranged on the surface of the continuous blowdown regulating valve. The sealing assembly comprises connecting flanges, a rear connecting pipe, a front connecting pipe, mounting bolts, a first sealing ring, a second sealing ring, a rubber sealing ring and fixing bolts, and the connecting flanges are arranged on the surfaces of the two sides of the lower end of the continuous row adjusting valve. According to the drip-proof boiler continuous blowdown device, the sealing performance of the adjusting valve of the device is greatly improved through the sealing assembly, the drip phenomenon is prevented, the adjusting valve can be rapidly disassembled and assembled, the adjusting valve with inner leakage is convenient to replace, drip caused by aging of the adjusting valve is avoided, continuous blowdown of a boiler can be achieved through the device through the blowdown assembly, and the service life of the boiler is prolonged. The salt content and alkalinity in the pot water are reduced, and the steam quality is prevented from being influenced by over-high concentration of the pot water.

The present application relates to a method for reducing the start-up time of a water-cooled wall standby furnace, which uses equipment including a gasifier water-cooled wall, a steam drum and a water-cooled wall circulating water pump. The present application makes full use of the heat of the continuous blowdown of the operating series steam drum, and realizes the maintenance of the standby series water-cooled wall temperature, and the system is simple and the control is convenient; compared with the prior art, the present application can reduce the start-up time of the standby furnace, reduce the impact of the gasifier trip on the device operation load, and reduce the economic loss caused by shutdown. According to the water baking time of 8 hours, the present application can reduce the economic loss of 8 hours caused by unplanned shutdown, and according to the gasification scale of 100,000 standard cubic meters / hour of effective gas production, the economic loss can be reduced by nearly 500,000 yuan.

The utility model discloses a novel sinter mixture bunker steam preheating device, which belongs to the technical field of sinter mixture bunker steam preheating, and comprises a boiler steam distribution drum, a heat preservation pipe is arranged at the top of the boiler steam distribution drum, an efficient steam-water separator is arranged at one end of the heat preservation pipe, a control valve is arranged in the efficient steam-water separator, and the control valve is connected with the steam distribution drum. A support frame is arranged at the bottom end of the efficient steam-water separator; according to the utility model, the thermal insulation pipe is arranged, the thermal insulation cotton and the thermal insulation pipe are used for protection through the design, so that the temperature loss of steam in the steam pipe is avoided, and then the heated sintering mixture ore tank is arranged on one side closer to the ignition furnace, so that the mixture can immediately enter the ignition furnace for ignition after being heated, and the heat loss in the conveying process is reduced; the air permeability of a material layer is improved, the thickness of a sintered material layer is increased, and the yield and quality of sintered ore are greatly improved.

This invention relates to the field of high-pressure steam drum water level regulation technology, and particularly to a collaborative control method for water level control. This method regulates the high-pressure steam drum water level by selecting different control strategy combinations based on the turbine load, the operating mode of the high-pressure main feedwater pneumatic regulating valve, and the operating mode of the high-pressure feedwater pump frequency converter. This achieves collaborative control of the high-pressure steam drum water level. The operating modes of the high-pressure feedwater pump frequency converter include single-impulse mode, three-impulse mode, and open-loop mode. The operating modes of the high-pressure main feedwater pneumatic regulating valve include single-impulse mode and three-impulse mode. This collaborative control method significantly optimizes regulation quality, achieves full-condition automatic control, frees up manpower, improves automation levels, enhances unit operation safety and economy, and solves the industry problem of poor water level regulation quality and reliance on manual labor during unit load fluctuations.

This utility model discloses a single-channel positive pressure gas waste heat boiler, specifically relating to the field of boiler technology. It includes a steam drum, a steam collector, a boiler body, and a pressure-bearing shell. The entire boiler body is housed within the circular pressure-bearing shell, while the steam drum and steam collector are located outside the shell and connected to the boiler body inside the shell via connecting pipes. The pipes are sealed at their penetration points into the shell. The boiler body is divided into upper and lower sections. The upper high-temperature zone is surrounded by a constant-temperature membrane water-cooled wall, while the lower low-temperature zone is constructed from welded steel plates. Two gas outlets connect the lower flue outlet to the pressure-bearing shell, forming a connecting layer. The inner wall of the pressure-bearing shell is insulated. A high-temperature superheater, a low-temperature superheater, and an evaporator are sequentially arranged at the top of the boiler body, while an economizer is arranged at the bottom. This utility model solves the problem of arranging the pressure-bearing and heating surfaces in traditional boilers, offering advantages such as reduced sealing difficulty, optimized heat exchange process, pressure balance, simplified insulation, and improved safety and energy efficiency.

The application discloses a heat-accumulating type steam and hot water cogeneration waste heat boiler system, which comprises a waste heat boiler body, a heat-accumulating type heat medium water system and related control valves. The waste heat boiler can absorb waste heat of flue gas to obtain hot water with different temperatures. Steam generated by vaporization and separation of superheated water in a steam drum can enter a steam pipe network after being heated by a heater to supply high-temperature users. Water with low enthalpy can be output by the heat-accumulating type heat medium water system to supply production and living hot water required by low-temperature users. The hot water is pumped back to the waste heat boiler body by a hot water circulating pump / booster after being cooled, and is heated by low-temperature flue gas, so that the exhaust gas temperature of the waste heat flue gas is further reduced, and the utilization efficiency of the waste heat is improved. The application realizes steam and hot water cogeneration functions of the waste heat boiler, outputs high-quality steam, and outputs high-temperature hot water with required temperature and pressure of users, and has simple control, high stability and high precision, and meets the requirements of fine production and life.

The utility model belongs to the technical field of intake manifolds, and provides an intake manifold device for a compressed air system of a power station, which comprises a steam pocket, a reducer and a branch pipe, two ends of the steam pocket are respectively provided with an air inlet and a water outlet, the reducer comprises a first reducer and a second reducer, the first reducer is connected with the air inlet of the steam pocket, and the second reducer is connected with the water outlet of the steam pocket. One end, far away from the steam pocket, of the second reducer is connected with the drain valve; a plurality of branch pipe connecting ports are uniformly formed in the two sides of the steam pocket, each branch pipe connecting port is communicated with a branch pipe through a branch pipe seat, and one end, far away from the steam pocket, of the branch pipe is connected with a user pipeline through a branch valve. The utility model provides an intake manifold device for a compressed air system of a power station, which can enable all user pipelines of the compressed air system to be arranged in a centralized manner, realize integration, improve the space utilization rate and facilitate the operation of overhaul and maintenance.

The application discloses a high-voltage heating single molten salt tank steam outlet device, a molten salt pump is arranged outside the molten salt tank, the molten salt pump is connected with a high-temperature molten salt distributor, a steam drum is provided with a steam drum high-temperature molten salt inlet, a low-temperature molten salt outlet, an oxygenated water inlet and a steam outlet, the steam drum high-temperature molten salt inlet and the low-temperature molten salt outlet are communicated through a heat exchange molten salt pipe, the steam drum high-temperature molten salt inlet is communicated with a mixed liquid outlet through a pipeline one, the low-temperature molten salt outlet is communicated with a low-temperature molten salt distributor through a pipeline three, the pipeline three is provided with a proportional valve, the proportional valve is communicated with the low-temperature molten salt inlet through a pipeline four, and the molten salt pump is communicated with the mixed device high-temperature molten salt inlet through a pipeline two.The application has the following characteristics: a single tank design is adopted, a hot tank and a cold tank are not needed, an external circulation structure is reduced, and thus the investment of a molten salt heating furnace is reduced, cost is saved, molten salt in a gravity recovery pipeline can be recovered, a high-pressure sleeve type electric heater is adopted to reduce the investment of a transformer and a secondary cable, and molten salt does not need to be discharged when the heater is replaced.

The invention discloses a flue gas dry-method sensible heat recovery and purification device and method for electric arc furnace steel smelting, and belongs to the technical field of electric arc furnace steel smelting. The device comprises an electric arc furnace, a water-cooling bent pipe, a combustion dust falling chamber, an evaporation cooling flue, a dust-gas separator, a waste heat recovery device, a dust remover and a heat exchanger which are sequentially connected. The evaporative cooling flue and the waste heat recovery device are respectively provided with a steam outlet, and the steam outlets are connected to the steam pocket; and a flue gas outlet of the heat exchanger is connected with an exhaust device. According to the invention, an electric arc furnace primary flue gas full-temperature efficient waste heat recovery process of an evaporative cooling flue, a high-temperature fire tube type waste heat recovery device and a radial heat pipe heat exchanger is adopted, heat of primary high-temperature flue gas of the electric arc furnace from about 1300 DEG C to about 80 DEG C is fully recycled, and more saturated steam can be generated for waste heat utilization or power generation.

The utility model discloses an overheating heat supply system, which relates to the technical field of heat supply, and comprises a waste heat boiler drum for a heating furnace in a steel rolling workshop, an inlet of the steam compressor can be communicated with an outlet of the waste heat boiler drum; according to the steam vacuumizing device for the vacuum refining device of the electric furnace steelmaking workshop, a high-pressure gas inlet of the steam vacuumizing device can be communicated with an outlet of the steam compressor, and an air suction port of the steam vacuumizing device is used for being communicated with the interior of a furnace body of the vacuum refining device. The problems that steam generated by a waste heat pot of a heating furnace in a steel rolling workshop is generally low in pressure and cannot be efficiently utilized, and a vacuum refining device in an electric furnace steelmaking workshop cannot obtain a large amount of low-pressure superheated steam at low cost for vacuumizing can be solved.

The invention relates to the technical field of coupling of heat storage devices and thermal power generating units, and discloses a graphite-based ultrahigh-temperature cascade heat storage coupling system and a working method thereof.The coupling system comprises a water supply unit, a solid heat storage unit, a steam pocket, a modular phase change heat storage device, a steam turbine system and a power generator; the water supply unit, the solid heat storage unit, the steam pocket, the modularized phase change heat storage device and the steam turbine system are sequentially communicated through a circulating pipeline, a heat exchange medium passing through a water supply pump flows into the solid heat storage unit, and a high-parameter medium with the temperature of 560 DEG C or above flows out of a medium outlet of the modularized phase change heat storage device. By means of the modularized heat storage device structure for direct contact heat exchange, heat storage materials and heat exchange pipes of all the modules are arranged in a layered mode, flow control is conducted in a layered mode, and stable control over the gas production temperature of the device is achieved.

The application relates to the technical field of boiler make-up water deoxidation, in particular to a high-efficiency low-temperature deoxidation system. The system comprises a vacuum deoxidizer and a water ring vacuum pump unit, a low-pressure steam pocket is connected with the vacuum deoxidizer through a pipeline, the vacuum deoxidizer is used for removing oxygen in the to-be-processed make-up water, and the deoxidized make-up water enters the water ring vacuum pump unit through a communicating pipeline; a central control unit is connected with the vacuum deoxidizer through a wireless signal, the central control unit is used for setting working parameters of the vacuum deoxidizer; and a monitoring unit is arranged in the vacuum deoxidizer and used for acquiring running parameters of the vacuum deoxidizer. The vacuum deoxidization realizes deoxidization under the condition of a low-temperature water surface (at 70 DEG C or normal temperature), the self-consumption steam quantity of a boiler room is reduced, the vacuum deoxidization can utilize low-grade waste heat, the water can be heated and softened by a jet heater, the deoxidization can be realized in stages and at a low position, the deoxidization is reliable, and the operation is stable.

The present application relates to a kind of fused salt steam generator, simplify existing fused salt steam generator volume, weight, reduce investment cost and manufacturing difficulty, improve heat exchange efficiency, reduce flow resistance;Fused salt steam generator includes: high-pressure side heat exchange plate, low-pressure side heat exchange plate, first steam drum, second steam drum, high-pressure side inlet pipe box, high-pressure side outlet pipe box, low-pressure side inlet pipe box and low-pressure side outlet pipe box, high-pressure side heat exchange plate and low-pressure side heat exchange plate surface are distributed with flow channel, high-pressure side heat exchange plate flow channel is divided into superheating zone, evaporation zone, preheating zone, in preheating zone close to high-pressure side inlet pipe box and with it communication for multiple Z-shaped flow channel, along flow direction, the end of Z-shaped flow channel is connected with multiple straight flow channel. Multiple high-pressure side and low-pressure side heat exchange plate orthogonally and alternately closely stacked, the front and back of stacked heat exchange plate are provided with metal cover plate, stacked heat exchange plate and metal cover plate are welded to form a complete cuboid, form the core body of fused salt steam generator.

According to the control method and system for the steam drum liquid level in the converter vaporization system, the frequency of a water feeding pump is interlocked with the actual pressure of the steam drum, and frequency is automatically adjusted along with the pressure change of the steam drum to meet the requirement that the water feeding pump continuously pumps water into the steam drum; according to the invention, in the blowing process, no matter how the pressure of the steam drum fluctuates, the water supply pump can accurately, reliably and continuously replenish water to the steam drum.

The present invention relates to the technical field of petrochemical cracking furnaces, and in particular to a motor-driven ethylene cracking system integrated with steam recovery and a process. A feed stream is heated, and then mixed with s dilution steam stream; the mixture is fed into a convection section of a cracking furnace to be overheated and then fed into a radiation section of the cracking furnace to be subjected to a cracking reaction to obtain cracked gas; the cracked gas is cooled by a quench cooler to obtain a product; a rotating unit in a cracking method is driven by a motor; and a steam drum generates a medium-pressure steam stream, and the medium-pressure steam stream is fed into the quench cooler to be subjected to heat exchange with the cracked gas and then is fed into a medium-pressure steam pipe network. By means of the described technical solution, the rotating unit of the cracking furnace is changed to be driven by the motor to rotate, so that the control is simpler. Moreover, the demand for high-pressure steam is reduced, and the energy utilization efficiency is improved by changing the process flow and connection mode of the cracking furnace.

To provide an extra-thick steel material for steam drums having excellent surface quality and lamellar tear resistance, and a manufacturing method thereof. [Solution] By weight, C: 0.2-0.3%, Si: 0.05-0.5%, Mn: 1.0-2.0%, Al: 0.005-0.1%, P: 0.01% or less, S: 0.015% or less, Nb: 0.001-0.02%, V: 0.001-0.03%, Ti: 0.001-0.03%, Cr: 0.01-0.3%, Mo: 0.01-0.12%, Cu: 0.01-0.4%, Ni: 0.05-0.4%, Ca: 0.0005-0.00 The steel has a matrix structure consisting of a composite structure of ferrite and pearlite with an average grain size of 20 μm or less, a surface layer region from the surface to 10 mm in the thickness direction, and a porosity of 0.1 mm or less in the center region from 3 / 8t to 5 / 8t (where t means the thickness (mm) of the steel material). 3 / g or less, and among the precipitates observed in the cross section of steel after post-weld heat treatment (PWHT), fine VC precipitates with a diameter of 5 to 15 nm are found to be 1 μm or less. 2 There can be five or more per prize.

The invention provides a water vapor electric heating all-condition one-key start control method for a combined cycle generator set, and belongs to the technical field of automatic control of the combined cycle generator set. Aiming at the problems that an existing APS system is multiple in breakpoint, poor in adaptability, complex in operation and the like, the method integrates cooperative control logic of a water circulation system, a steam system, an electric power system and a thermal power system, a cold / temperature / thermal state all-working-condition self-adaptive starting curve is built in, and breakpoint-free automatic operation of gas turbine ignition, waste heat boiler temperature and pressure rising, steam turbine impulse running grid connection and heat supply switching is achieved. The core innovation comprises bypass multi-mode self-adaptive control, steam drum water level sectional type adjustment, automatic steam supply switching and cross-system undisturbed communication, real-time monitoring of 400 + key parameters and setting of multi-stage safety protection. After the method is implemented, the cold starting time is shortened, the manual misoperation risk is reduced, the main steam temperature fluctuation is controlled within + / -5 DEG C, the unit starting efficiency, safety and economical efficiency are remarkably improved, and the method is suitable for all-working-condition starting scenes of E-level and above combined cycle generator units.

The utility model discloses a gas-fired boiler combined with finned tubes for heat exchange, which comprises a burner and a hearth, the side wall of the hearth is a water-cooled wall, a finned tube group is arranged in the hearth and in front of the burner, finned tubes of the finned tube group and the top end of the water-cooled wall are communicated with a steam pocket positioned at the upper part of the hearth, and the top end of the steam pocket is communicated with a heat exchanger. A settling pipe is arranged on the side, away from the combustor, in the hearth, the upper end of the settling pipe penetrates out of the top of the steam pocket and is communicated with the steam pocket through a backflow pipe, the area of the communication section of the backflow pipe and the steam pocket is smaller than that of the settling pipe, and a water level electrode is arranged in the settling pipe. And the bottom ends of the settling tube, the finned tubes of the finned tube group and the water-cooled wall tubes of the water-cooled wall are communicated with one another. The water level detection accuracy of the built-in water level electrode can be improved.

This invention discloses a waste heat steam boiler system, including a steam drum and a heating boiler shell. The steam drum is equipped with a main steam outlet and a water inlet. The heating boiler shell contains a cylindrical heating chamber. Several parallel and spaced waste heat flue gas heat exchange tubes pass through the heating chamber laterally, forming a flue gas heat exchange tube array. The lower part of the inner cavity of the steam drum is connected to the lower end of the heating chamber through a downcomer, and the upper end of the heating chamber is connected to the inner cavity of the steam drum through a riser. The heating chamber is equipped with a labyrinthine steam dissipation structure, thereby improving the overall heat utilization efficiency of high-temperature flue gas.

The application discloses a kind of gas steam boiler tail gas waste heat recycling regulation and control system, it includes: low-pressure steam pocket;Water supply pump is used to water supplement in low-pressure steam pocket;Flue gas temperature monitor is used to monitor the flue gas temperature value of the tail of boiler in real time;Water level monitor is used to monitor the water level value in low-pressure steam pocket in real time;Hot water heater is connected between water supply pump and low-pressure steam pocket, for using the flue gas waste heat of the tail of boiler to preheat water body before entering low-pressure steam pocket;Water temperature monitor is used to monitor the water body temperature value at hot water heater outlet in real time;Control unit is used to comprehensively regulate and control the water body flow that is preheated by hot water heater according to the data collected by instrument.The water supplement of low-pressure steam pocket is heated by hot water heater before being sent into low-pressure steam pocket to continue to carry out steam-water circulation, which can reduce the flue gas temperature of boiler, improve the thermal efficiency of boiler, and the water body flow that needs to be preheated can also be accurately regulated and controlled by control unit using relevant data.