1055results about "Steam boilers components" patented technology

The invention discloses an automatic monitoring method and device for pipe explosion of a heating surface of a boiler, and relates to the technical field of monitoring of pipe explosion of the heating surface of the boiler. The monitoring method comprises a multi-source signal acquisition step, a data preprocessing and feature extraction step, a double-model parallel prediction step, a dynamic weighted fusion step, a consistency check and feedback calibration step and a risk response output step. According to the CNN-LSTM model sound wave frequency domain feature-temperature field gradient change spatio-temporal multi-source data joint identification, the limitation that a traditional model only pays attention to a single dimension is solved, feature distribution Attention and a physical guidance fusion mechanism solve the false alarm problem of a pure data driving model through a user-defined physical rule constraint function, and the accuracy and the reliability of the model are improved. A dynamic confidence SNR weighting mechanism enables the tube burst identification accuracy of the model under a strong noise working condition to be improved, and physical-data dual-drive consistency check realizes long-term maintenance of high positioning precision.

The invention relates to the field of boiler fixing devices, in particular to a boiler fixing device which comprises two rotating frames, two sets of clamping pieces, an adjusting piece, a plurality of rotating wheels and a limiting rod. The two rotating frames are symmetrically arranged on the fixed seat, and the first openings of the two rotating frames are opposite to each other; the two sets of clamping pieces are installed in the two rotating frames respectively, a clamping space is formed between each set of clamping pieces, a second opening is formed in the side, close to the first opening, of the clamping space, the width of the second opening is smaller than the inner diameter of the clamping space, and the width of the second opening is adjustable; the adjusting piece is inserted into the end parts of the rotating frames, is in transmission connection with the clamping piece and is used for adjusting the clamping piece to move along the opposite directions of the two rotating frames; the multiple rotating wheels are installed on the surface of the clamping piece and attached to the pipeline in the clamping space. The limiting rod is inserted into the fixing base, and when the clamping piece is in a stopped state, the surface of the limiting rod is clamped to the upper end face and the lower end face of the clamping piece, and the clamping piece is fixed.

The invention discloses a steam boiler with a steam waste heat recovery function, which comprises a steam boiler body, a combustion chamber, a box body, a combustor, a steam pipe, a smoke exhaust pipe, a drainage mechanism, a connecting pipe, a water inlet pipe and a heat exchanger, the combustion chamber is arranged in the steam boiler body, and the combustor is arranged on one side of the combustion chamber; and a steam pipe is arranged at the top of the steam boiler body. According to the steam boiler with the steam waste heat recovery function, in the aspect of waste heat recovery, the heat exchanger of a composite structure of the heat conduction pipe and the spiral pipe is adopted, sensible heat and latent heat of high-temperature smoke in the smoke exhaust pipe are efficiently captured, and heat is rapidly transferred to a water inlet system through low-boiling-point heat conduction liquid; the waste heat of the flue gas which is directly discharged originally is fully recycled, and the energy loss is greatly reduced.

The utility model provides a steam system which comprises a steam generator and an inner container, and the steam generator is used for generating steam; the steam pipe fitting is arranged on the inner container in a penetrating mode, and one end of the steam pipe fitting is connected with the steam generator; the flow blocking piece is arranged at the other end of the steam pipe fitting, at least part of the flow blocking piece and a steam outlet of the steam pipe fitting are opposite and arranged in a spaced mode, a flow blocking channel is defined by the flow blocking piece and at least part of the steam pipe fitting, and the flow blocking channel is communicated with a cavity of the inner container. And steam in the steam pipe fitting passes through the flow blocking channel and then enters the cavity of the inner container. By means of the technical scheme, the technical problem that in the prior art, noise of a steam system is large can be solved.

The invention discloses a heating network heater drainage multi-path switching and water quality standard reaching control technology, and relates to the field of path switching and water quality control, and the technology comprises the steps: configuring a foundation of a heating network heater drainage system, including a conventional drainage path and an accident drainage path, the conventional drainage path is composed of a drainage pump, a drainage pipeline, a drainage control valve and a pipeline connected with a condensate water mother pipe, and the accident drainage path is composed of a drainage pipeline, an accident drainage control valve and a discharge connector connected with a waste heat boiler fixed discharge pipeline. A tubular heat supply network heater is arranged in a heat supply network circulating water system, and a multi-path drainage drainage system comprising a conventional drainage path and an accident drainage path is established on the outlet side of the heat supply network heater, so that graded recovery and abnormal isolation of drainage are realized; and continuously monitoring the hydrophobicity by combining an on-line conductivity analyzer, an on-line pH analyzer and an on-line iron ion analyzer.

The invention provides a subcritical boiler platen reheater clamping pipe leakage prevention method, device and equipment. The subcritical boiler platen reheater clamping pipe leakage prevention method comprises the steps that dissimilar steel welding connection of a clamping pipe and a pulling plate is relieved; assembling a pipe ring on the outer wall of the clamping pipe to form non-welding type mechanical isolation, and welding and fixing a pulling plate on the outer wall of the pipe ring to complete reconstruction of a stress conduction path; after reconstruction is completed, a two-factor monitoring mechanism for spheroidizing degradation of the clamping pipe and temperature fluctuation of the screen reheater is established; monitoring data are collected based on a two-factor monitoring mechanism, and combustion parameter pre-adjustment and pipeline preventive replacement are dynamically triggered; according to the method, the leakage correlation event is periodically analyzed, the coal blending combustion and maintenance strategy is reversely optimized, the problem that leakage is likely to be caused in a traditional welding mode is solved by removing welding and completing stress conduction path reconstruction, faults can be warned in advance through two-factor monitoring and periodic analysis, and the possibility of leakage is reduced.

The invention relates to a power station boiler self-adaptive load combined preheating recovery system which comprises a preheating system, a monitoring module and a regulation and control module, and the preheating system comprises a heat pipe heat exchanger set and a heat pump system; the heat pipe heat exchanger set is used for recycling high-grade flue gas waste heat in a combustion system in a power station boiler to preheat water in a water supply pipeline. The heat pump system is used for recycling low-grade flue gas waste heat of a second flue in the power station boiler to preheat ambient air at the inlet end of the air conveying fan; the monitoring module is used for collecting flue gas data of a first flue and a second flue in the power station boiler and a current load mode of the power station boiler; and the regulation and control module is used for dynamically regulating operation parameters of the heat pipe heat exchanger group and / or the heat pump system based on the flue gas data of the power station boiler and the current load mode, so that the regulated heat pipe heat exchanger group and the regulated heat pump system are used for recovering flue gas waste heat for preheating. Waste heat efficient recovery and stable operation of the boiler within the range from full load to deep adjustment load are achieved.

The embodiment of the invention discloses a pressure control method and system for a once-through steam generator of a nuclear reactor, and relates to the technical field of nuclear power. Determining power deviation according to the operation power and the secondary circuit load; according to the power deviation, the rated power corresponding to the nuclear reactor and the rated feed water flow corresponding to the once-through steam generator in the nuclear reactor, pressure regulation information is determined; and adjusting the pressure of the once-through steam generator according to the pressure adjusting information. According to the embodiment of the invention, a PID controller is not needed in the process of determining the pressure regulation information, but the pressure regulation information determined based on the power deviation directly acts on the feed water flow regulation valve, so that rapid and accurate OTSG pressure control can be realized.

The invention discloses an online monitoring method for the expansion state of a supercritical boiler based on the Internet of Things. The online monitoring method comprises the steps that a boiler body is divided into a plurality of levels along the height; setting a plurality of detection points on the main hierarchy; monitoring multi-direction expansion displacement data of each detection point through a sensor group; receiving the data through a data transmission unit, and transmitting the data to a processing unit; the processing unit processes and analyzes the data transmitted by each data transmission unit after receiving the data, and transmits a result to the evaluation unit; the evaluation unit evaluates the boiler wall expansion state of each layer according to the analysis result; hierarchical division and detection point layout are optimized through boiler structure stress characteristics and thermal load distribution rules, three-dimensional expansion data are captured through a multi-direction sensor set, real-time data transmission is achieved through the Internet of Things, an evaluation model is built by fusing boiler operation multiple parameters, and accurate, comprehensive and real-time monitoring of the boiler expansion state is achieved. And safe and stable operation of the supercritical boiler unit is ensured.

The invention provides an intelligent tracking and early warning method for a whole-flow stress state of steam boiler equipment, which relates to the field of steam boiler equipment monitoring and comprises the following steps: acquiring real-time data, calculating instantaneous operation parameters, constructing a stress state association diagram and generating a stress feature vector; determining a state equation and an observation equation, calculating stress state parameters in combination with a Kalman filter, dividing the stress state parameters into a primary stress chain and a secondary stress chain, evaluating the overall stress state, and generating early warning information when an evaluation value exceeds a safety threshold value. According to the method, the boiler stress state can be accurately tracked, the early warning accuracy is improved, and the equipment fault risk is reduced.

The invention relates to the field of boiler control, and discloses an ultra-supercritical boiler control method and system with a dynamic overtemperature early warning function. Comprising the following steps: generating a dimensionless dynamic state description set based on boiler design parameters and real-time sensor data; and according to the three-dimensional grid division of the heating surface, when the gradient exceeds a safety threshold, generating an early warning signal carrying a space coordinate, thereby realizing early-stage accurate positioning of the risk. Generating a proportional gain parameter based on the early warning position weight and the overtemperature probability value, and offsetting the execution delay through phase lead compensation; and updating sensor data after executing the instruction, and generating a closed-loop convergence mark when the detection state change rate is lower than a threshold value, thereby realizing control stability verification. According to the invention, the traditional static threshold alarm and manual intervention mode is broken through, the conversion from passive alarm to active suppression is realized, and the pipe explosion risk under the working condition of deep peak regulation is obviously reduced.

The invention belongs to the technical field of cooking equipment, and discloses a steam generation assembly, a control method of the steam generation assembly, a steam box and an integrated cooker. According to the steam generation assembly, the water inlet of the heating disc is provided with the protruding part, the protruding part is higher than the water level in the water tank, the water temperature and / or the temperature rise rate of the position, close to the water inlet, of the water inlet pipe are / is monitored through the first temperature sensing element, and the water shortage state of the water tank can be rapidly judged due to the fact that the water amount is small and the temperature change is more remarkable. And after determining that the water inlet is lack of water, further judging whether the heating disc is in dry burning or not by combining the heating body temperature and / or the temperature rise rate monitored by the second temperature sensing element. And the accuracy and the reliability of judgment are improved through cooperative monitoring of the double temperature-sensing elements. In addition, by recognizing the water shortage of the water tank in advance, the temperature threshold T3 of the heating body in the dry burning state can be properly reduced, the logic judgment time is shortened, the dry burning duration is shortened, the heating disc is effectively protected, and the service life of the heating disc is prolonged.

The invention discloses a boiler operation intelligent diagnosis platform based on multi-source data fusion. The boiler operation intelligent diagnosis platform comprises a data acquisition and preprocessing module, a multi-source data fusion and feature extraction module, an intelligent diagnosis and decision support module and a man-machine interaction and alarm module. According to the invention, a modularized multi-source data fusion intelligent diagnosis platform is constructed, various heterogeneous data are uniformly processed through a data acquisition and preprocessing module, and a high-quality data basis is provided for upper-layer analysis; a multi-source data fusion and feature extraction module is used for deeply mining associated features among data, and a fusion feature set capable of comprehensively reflecting the boiler health state is constructed; and finally, through an intelligent diagnosis and decision support module, in combination with historical data and real-time fusion features, early warning, accurate positioning and root analysis of boiler faults are realized, an operation and maintenance mode is converted into predictive maintenance from post-maintenance and regular maintenance, and the safety and reliability of boiler operation are remarkably improved.

The invention discloses a steam utilization device for steam turbine overhaul, and belongs to the technical field of steam utilization, the steam utilization device comprises an equipment base, a heat exchange box body is fixedly mounted at the top of the equipment base, the top of the heat exchange box body is fixedly connected with an evaporation boiler through a heat conduction structure, and the evaporation boiler and the heat exchange box body are in heat conduction fit; an energy conversion shell is fixedly installed at the position, close to the heat exchange box body, of the top of the equipment base, a first-stage condenser is fixedly installed at the position, close to the energy conversion shell, of the top of the equipment base, and the inlet end of the first-stage condenser communicates with the outlet end of the energy conversion shell in a sealed mode through a pipeline. High-temperature and high-pressure steam firstly enters the heat exchange rectangular pipe to release heat energy, condensate water containing impurities is evaporated and purified through the discharged high-temperature steam, thorough separation of the impurities and a water body is achieved, and the situation that steam water containing the impurities enters a steam turbine again to pollute the steam turbine is fundamentally avoided.

The utility model discloses a composite high-voltage solid heat storage electric boiler, and relates to the field of electric boilers. A composite type high-voltage solid heat storage electric boiler comprises a boiler cabinet and further comprises an installation cavity, a heat storage cavity, a heat storage cavity and a heat storage cavity, the bearing plates are fixedly connected to the inner wall of the mounting cavity at equal intervals; the solid heat storage bricks are placed on the bearing plate; the connecting rod is connected into the mounting cavity in a sliding mode, and a plurality of fixing blocks used in cooperation with the bearing plate are fixedly connected to the connecting rod at equal intervals; according to the utility model, through the cooperation of the pressurizing pipe, the piston disc, the connecting rod and the fixing block, the solid heat storage brick can be preliminarily fixed, and the heat conduction rod conducts heat in the mounting cavity to the sleeve, so that gas in the sleeve is heated and expanded to increase air pressure, and the clamping force of the fixing block on the solid heat storage brick is further increased; the fixing stability of the solid heat storage brick in the working process is effectively improved, looseness caused by factors such as vibration is reduced, and stable operation of equipment is guaranteed.

The application discloses a device and method for preventing dry burning of a reheater of a waste heat boiler, and the device comprises a high-pressure blowing unit, a medium-pressure blowing unit, a low-pressure blowing unit and a reheater unit. The high-pressure blowing unit and the medium-pressure blowing unit can ensure that the reheater unit has steam flow in the whole blowing process, and the low-pressure blowing unit can stabilize the blowing pressure. The device and method can prevent the reheater from being in a dry burning state during blowing.

The utility model discloses a coil pipe type steam boiler, which relates to the technical field of coil pipe type steam boilers, and comprises a boiler body, a burner arranged at the upper end of the boiler body, an energy saver arranged at the rear end of the boiler body, a chimney arranged at the upper end of the energy saver, a steam-water separator arranged on one side of the boiler body, and a steam-water separator arranged on the other side of the boiler body. A control box is arranged on one side of the steam-water separator, a water supply system is arranged on the other side of the furnace body, an air duct pipeline is arranged at one end of the burner, an air supply fan is arranged at one end of the air duct pipeline, a base is arranged at the bottom of the furnace body, and the air supply fan is fixed to the base. According to the scheme, the problems that an existing steam boiler mostly adopts a boiler barrel structure, high-temperature steam is not prone to being discharged, explosion is prone to being caused, and safety is low are solved.

This application belongs to the field of nuclear power plant engineering, specifically relating to a device for secondary side maintenance of a horizontal steam generator used in a nuclear power plant. The device includes: an air supply duct, an air supply fan, an exhaust duct, and an exhaust fan. One end of the air supply duct enters the steam generator through a manhole and extends to the bottom of the heat transfer tubes of the steam generator; the other end of the air supply duct is connected and fixed to the outlet of the air supply fan. One end of the exhaust duct is placed on an underwater steam distribution plate inside the steam generator, and the other end passes through the manhole and is connected and fixed to the inlet of the exhaust fan. No special placement platform is required; any location on site can be used as a placement location. Internal maintenance can be achieved simply by opening one manhole, improving maintenance efficiency.

The invention discloses a nuclear power plant steam generator secondary side state setting system and method. The system comprises an air compressor, a steam generator and a main steam system. The steam generator comprises a secondary side, a first hole site located in the lower portion of the secondary side, a second hole site located in the upper portion of the secondary side and a steam outlet located in the top of the secondary side. An inlet of the main steam system is connected with the steam outlet; the air compressor is connected with the first hole site; when the secondary side of the steam generator is dried, the air compressor is used for filling dry compressed gas through the first hole site, and the main steam system and the second hole site are used for exhausting. When the secondary side is dried, the boundary of the main steam system is contained in the drying pressure range, although the state setting of the main steam system is increased, the main steam system is located outside the steam generator, no irradiation dose exists, operation is convenient, and foreign matter cannot be introduced even if operation is not conducted in the steam generator. The main steam system and the second hole position exhaust jointly, so that the drying efficiency is greatly improved.

The utility model discloses a steam boiler ash removal device, relates to the technical field of boiler ash removal, and aims to solve the problem of low boiler ash removal efficiency in the prior art, the steam boiler ash removal device comprises a moving mechanism, the moving mechanism comprises a bottom plate, universal wheels, a push handle and a hydraulic elevator, and a mounting plate is fixed at the top of the moving mechanism. And supporting plates are fixed to the two sides of the top of the mounting plate correspondingly, a collecting box is arranged between the two supporting plates, the two supporting plates are rotationally connected with ash removal mechanisms correspondingly, and each ash removal mechanism comprises a fixing cylinder, a second servo motor, an ash removal shovel, a spiral conveying rod and a discharging pipe. According to the boiler ash removal device, the ash removal mechanism is inserted into the boiler, the ash removal shovel is inserted into the boiler ash, the second servo motor drives the spiral conveying rod to rotate, the boiler ash is conveyed in the fixing barrel and discharged into the collecting box through the discharging pipe, and therefore manual ash removal of the boiler is replaced, the labor intensity of workers is relieved, and the working efficiency is improved. And the working efficiency can be improved.

The invention relates to the technical field of thermal power plant boiler walls, and discloses a thermal insulation and heat preservation sealing structure for a thermal power plant boiler wall. The heat insulation and preservation mechanism is located in the heat preservation inner shell; and the sealing connection mechanism is located between the two heat preservation inner shells. According to the heat-insulation and heat-preservation sealing structure for the boiler wall of the thermal power plant, concrete is injected into the concrete outer shell so that the heat-preservation inner shell can be conveniently poured and fixed to the ground, the connecting supporting plates can conveniently and movably fix the connecting steel bars into the concrete outer shell through the rotating clamping holes, and the concrete is injected into the two sides of the interior of the concrete outer shell; a synchronous plate is manually driven to linearly move, the synchronous plate is connected with a connecting shaft through a rotating hole, the connecting plate is conveniently controlled to shake left and right, then a connecting steel bar is driven to rotate, the connecting steel bar drives a uniform stirring rod to uniformly stir and defoam concrete, concrete solidification is facilitated, and the connecting steel bar is convenient for improving the connecting strength of the concrete; and the thermal insulation inner shell can be conveniently fixed outside the boiler wall of the thermal power plant.

The invention discloses a heat pipe type steam generator based on boiler exhaust smoke waste heat utilization, and relates to the field of steam generators, the heat pipe type steam generator specifically comprises a steam generator shell, a heating furnace is arranged in the steam generator shell, a front heat exchange smoke pipe is arranged on one side of the heating furnace, and rear heat exchange smoke pipes are arranged on the two sides of the front heat exchange smoke pipe; a smoke outlet is formed in the top of the steam generator shell, and a residual smoke pushing mechanism and an intermittent smoke discharging mechanism are arranged on one side of the rear heat exchange smoke pipe. The multiple heat conduction bins are arranged in the area located at the tail end of the heat exchange smoke pipe, hot smoke is fed into the heat conduction bins through the push plate moving in a reciprocating mode, the heat conduction bins conduct heat into water again, the heat utilization effect of the hot smoke is improved, meanwhile, the cover ring and the pressing plate are arranged at the smoke exchange position, and the heat exchange efficiency is improved. Hot flue gas is directly extruded and fed into the heat exchange flue gas pipe through reciprocating motion, the residence time of the high-temperature flue gas is shortened, and heat waste of the high-temperature flue gas is avoided.

The systems and methods of the invention pertain to analyzing steam generator tube data for the detection of wear. Further, the invention is capable of performing a comparison of current tube signal data to baseline or historic tube signal data, e.g., from previous and / or the first, in-service inspection of the steam generator. The systems and methods are automated and can generate results to show potential tube-to-tube contact wear areas as well as the progression of tube-to-tube gap reduction within a steam generator tube bundle. In certain embodiments, the invention is capable of comparing current and historical eddy current data to determine the difference that may be related to degradation or other interested phenomena, and of processing and trending historical comparison results to establish normal variance and detect abnormal variances.

The finned coil pipe type gas boiler comprises a boiler body, finned heat exchange pipes and a combustor, the boiler body comprises a combustion barrel, a heat exchange barrel and a connecting barrel, and the finned heat exchange pipes are arranged in the combustion barrel and the heat exchange barrel correspondingly; the fin type heat exchange pipe is a single-circle or multi-circle fin type coil pipe; the fin type coil pipe comprises a spiral coil pipe and a fin plate fixed on the spiral coil pipe; and a combustion rod of the combustor extends into the combustion barrel. The finned coil type gas boiler can effectively improve the heat conversion efficiency, reduce the equipment size and facilitate installation and transportation.

The application provides a coupling system and a control method for improving the variable load rate of a secondary reheat unit integrated with a medium-temperature energy storage, wherein the medium-temperature energy storage system is connected with the high-pressure cylinder outlet through a high-pressure cylinder outlet steam extraction valve during the energy storage process, is connected with the deaerator outlet through a pressure relief valve, is connected with the feed water pump outlet through a deaerator outlet regulating valve during the energy release process, and is connected with the boiler feed water inlet through a pipeline, so as to form a secondary reheat unit integrated with the medium-temperature energy storage; and a load splitting method is provided, which splits the whole unit load instruction into a medium-temperature energy storage system load instruction and a secondary reheat unit boiler coordination system load instruction, and the medium-temperature energy storage system load instruction is realized through high-pressure cylinder exhaust valve opening degree control and deaerator outlet regulating valve opening degree control in the load decreasing and increasing processes; through the coupling system and the load splitting method, the time-space transfer of the unit energy in the variable load process is realized, the variable load rate of the secondary reheat unit is improved, and the flexibility of the unit is enhanced.

A nuclear power plant comprising at least one nuclear reactor having a steam generator, a steam cycle including the steam generator, a first turbine fluidly coupled to the steam generator, a first condenser fluidly coupled to the first turbine, and a feedwater heater fluidly coupled to the first condenser and the steam generator, an intermediate thermal loop including the first condenser, and an evaporator, and an organic cycle including the evaporator, a second turbine fluidly coupled to the evaporator, a second condenser fluidly coupled to the second turbine, and a heat exchanger fluidly coupled to the second condenser and the evaporator.

This utility model discloses a heating device for drying a fluidized bed. It includes a steam boiler, with a steam pipe fixedly connected to the upper surface of the steam boiler. The steam pipe is fixedly connected to a shell, with a fluidized bed above the shell and a wind chamber below. Multiple layers of steam ring pipes are embedded in the inner wall of the fluidized bed. The steam ring pipes are fixedly connected to a condensate pipe and a steam riser pipe. The steam riser pipe is fixedly connected to a spiral finned tube, which is fixedly connected to the wind chamber. A fan is fixedly connected to the left surface of the wind chamber, and an air inlet pipe is fixedly connected to the upper surface of the wind chamber. An air distribution plate is fixedly connected to the upper surface of the air inlet pipe. Through this structure, the embedded steam ring pipes avoid the problem of adhesion in areas prone to dead zones on the surface of the internal heat exchanger. Furthermore, the steam heat is transferred to the fluidized air through the spiral finned tubes to achieve primary drying, while the material is further dried secondaryly through the embedded steam ring pipes within the fluidized bed, fully utilizing a single heating system for double-efficiency material drying.

The invention discloses a steam utilization method and related equipment, and relates to the technical field of coking production, and the method comprises the following steps: carrying out sensible heat recovery on raw coke oven gas discharged by a coke oven riser in a target coking plant area to obtain a first steam source; steam extraction is conducted from a dry quenching power generation turbine in the target coking plant area, and a second steam source is obtained; acquiring steam demand parameters of a plurality of process units in the target coking plant; based on the steam demand parameters, the first steam source and the second steam source are distributed for use by the plurality of process units. According to the method, a high-pressure steam pressure reduction mode is replaced by raw gas sensible heat recovery steam and steam turbine medium-pressure extraction steam, flexible distribution is combined with process requirements, steam cascade efficient utilization and self-sufficient balance in a plant area are achieved, energy consumption and cost are reduced, stable production is guaranteed, and meanwhile energy-saving and environment-friendly benefits are achieved.

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 novel PTC steam generator, comprising a PTC heating core. The end of the PTC heating core furthest from the outlet is connected to a flow channel frame. After connection, the PTC heating core is installed inside a housing. A sealing ring is installed at the outlet end of the housing, followed by a sealing device. The housing has a liquid inlet and a gas outlet. The flow channel frame has spiral flow channel ribs centered on the PTC heating core. These ribs, along with the outer surface of the PTC heating core and the inner surface of the housing, form a spiral liquid flow channel, ensuring sufficient contact between the liquid and the PTC heating core to generate gas. Compared to existing technologies, the advantages of this invention are: the spiral flow channel ribs centered on the PTC heating core maximize the utilization of the PTC heating core's surface to create a liquid flow channel, ensuring sufficient contact between the liquid and the heat source PTC heating core to generate gas, thus improving product performance.