510 results about "Boiler water" patented technology

The invention relates to the technical field of control regulation, in particular to a supercritical unit variable load rate dynamic compensation control method, which comprises the following steps: acquiring unit operation data, performing credibility restoration, and outputting a credible parameter set; a time sequence mapping table is constructed based on the credible data, and boiler heat storage lag time, steam turbine control valve delay and a steam temperature interstage coupling coefficient are quantified; correcting the boiler water supply feedforward instruction by using the heat storage lag time to generate a compensated water supply instruction; according to the time sequence mapping table and the main steam pressure change rate, a multi-genetic algorithm is adopted to optimize a control valve constraint rule, and a dynamically constrained control valve action instruction is generated; an inter-stage coupling coefficient is called to generate a swing angle compensation amount, and water spraying temperature reduction disturbance is blocked; safety locking parameters are monitored to trigger buffering intervention in a grading mode, and compensation instructions are integrated to implement cooperative correction. The problem of out-of-step response of multiple execution units under the variable load working condition is solved, and the unit adjusting rate and the control stability are remarkably optimized.

The invention discloses a surface-to-point boiler water-cooled wall leakage positioning method based on acoustic signals, which comprises the following steps: respectively and symmetrically distributing sound wave receiver matrix position points on four wall surfaces of a boiler water-cooled wall, establishing a first coordinate system, and installing a sound wave receiver on each sound wave receiver matrix position; the positioning method comprises the following steps: acquiring real-time sound information of sound wave receiver matrix position points through sound wave receivers, calculating the real-time sound information of each wall surface, calculating RMS values of the sound wave receivers, sequencing, determining the leaked wall surface and the position of the corresponding sound wave receiver on the wall surface according to the maximum RMS value, and determining the position of the leaked wall surface according to the position of the corresponding sound wave receiver. And establishing a planar two-dimensional second coordinate system, at least acquiring second coordinates of the sound wave receivers corresponding to the second and third large RMS values in the wall surface in the second coordinate system, and calculating a corresponding relation of the second coordinates of the corresponding sound wave receivers to obtain second coordinates of the leakage point. And rapid and accurate spatial positioning of leakage points is realized.

The invention relates to the field of electrical digital data processing, in particular to a boiler atmosphere field state monitoring method, which comprises the following steps: collecting concentration data of combustible gases in a boiler water wall area through measuring equipment, carrying out space-time calibration on the concentration data of multiple measuring points, constructing a data processing model based on a graph convolutional network, and training the data processing model. Obtaining a trained data processing model; the method comprises the following steps: collecting concentration data of each combustible gas in a boiler water-cooled wall area through measuring equipment to obtain new multi-measuring-point concentration data; and after the steps are executed, inputting the data into a trained data processing model to obtain a combustible gas predicted concentration matrix of each measuring point at a future moment, continuously monitoring the combustible gas predicted concentration matrix of each measuring point at the future moment, and when the predicted concentration of any measuring point exceeds a safety threshold value, triggering an early warning signal and positioning a high-risk area. An existing boiler atmosphere field state monitoring method has the problem of low prediction credibility, and the method provided by the invention is high in prediction credibility.

The invention relates to a boiler flue gas heat recovery system which comprises a heat supply device, the heat supply device comprises a boiler and a heat supply pipeline, the heat supply pipeline comprises a boiler water inlet pipe and a boiler water outlet pipe which communicate with the boiler, a flue is formed in a smoke exhaust device, and a first heat exchanger and a second heat exchanger are sequentially arranged in the flue in the flue gas flowing direction; the first waste heat recovery device comprises a first waste heat recovery flow path and a heat pump, the first waste heat recovery flow path is connected with the first heat exchanger and a boiler water inlet pipe, the heat pump is arranged on the first waste heat recovery flow path, the second waste heat recovery device comprises a second waste heat recovery flow path, and the second waste heat recovery flow path communicates with external air and a boiler. By arranging the heat pump, on one hand, the heat transfer temperature difference can be increased, smoke sensible heat and even part of latent heat can be efficiently recycled, on the other hand, the recycled heat can be flexibly adjusted according to changes of boiler loads, and therefore the system can adapt to changes of loads output by the system under different conditions.

The embodiment of the invention provides a multi-dimensional detection method and system for steam-water pollution, and the method comprises the steps: setting sampling points at target positions of condensed water, feed water, boiler water and a steam system, and detecting sampling parameters at the sampling points; identifying a water quality abnormal signal based on the sampling parameter and a preset threshold value of the water quality index; associating the water quality abnormal signal with target equipment and carrying out chemical analysis so as to position a pollution source; monitoring the thermotechnical state of the target equipment in real time, collecting thermotechnical parameters, and establishing a linkage model of the thermotechnical parameters and the water quality indexes to identify the influence of abnormal working conditions on the water quality; according to the influence result of the abnormal working condition on the water quality, the water delivery module, the shaft seal module and the dosing module are subjected to sealing performance test and purity detection so as to identify hidden source abnormal signals; and performing multi-dimensional analysis on the water quality abnormal signal, the pollution source, the abnormal working condition and the hidden source abnormal signal, and building a fault tree to generate a pollution source priority list and dynamically adjust a pollution discharge strategy.

The invention relates to the technical field of energy storage assisted thermal power generating unit frequency modulation, in particular to an intelligent thermal power and energy storage combined frequency modulation control system and method based on multi-mode switching, and the system comprises a telecontrol device, an intelligent thermal power and energy storage cooperative control system, a thermal power generating unit and an energy storage system. The telecontrol device sends an automatic power generation control instruction to the intelligent fire-storage cooperative control system and the thermal power generating unit, and according to different mode selection modes, the intelligent fire-storage cooperative control system obtains an energy storage power instruction and adjusts the output of an energy storage system by using an internally designed functional module; the thermal power generating unit obtains a unit load instruction and adjusts the output of the thermal power generating unit by utilizing an internally designed functional module, the combined output of the energy storage system and the thermal power generating unit responds to an automatic power generation control instruction, deep coupling and efficient control of the thermal power storage system are achieved, the long-term frequent and rapid frequency modulation pressure of the thermal power generating unit is relieved, and the over-temperature risk of a boiler water cooling wall is reduced. The comprehensive economy and safety of the fire storage system are improved, and the combined frequency modulation capacity of the fire storage system is improved to the maximum extent.

The utility model discloses a sampling device for industrial boiler water quality inspection, and relates to the technical field of industrial boiler water quality inspection. The device comprises a vehicle body, the top of the vehicle body is fixedly connected with a cooling water tank, a sampling assembly is arranged on the left of the cooling water tank, and a collecting assembly is arranged above the cooling water tank. According to the utility model, the sampling assembly is arranged, specifically, the suction head on the throwing hose is put into the boiler, the water pump is started to pump out boiler water and convey the boiler water into the shunting block, and a worker rotates the valve to control the opening direction of the shunting block, so that the sampled water flows into the shunting pipe on the left side or the shunting pipe on the right side; according to the boiler water sampling device, water in different boilers or water at different depths can be sampled into the other collecting tank after entering one collecting tank, so that different boiler water can be sampled at the same time, frequent and sequential sampling is not needed, and workers are prevented from staying in a boiler area for a long time.

The invention discloses a treatment system for power plant wastewater recovery, which comprises a softening pretreatment assembly for removing impurities in wastewater, a clarification tank for treating suspended matters, a clean water tank for storing clean water, a membrane concentration assembly communicated with the softening pretreatment assembly, and a water supply assembly communicated with the membrane concentration assembly. The device is used for further improving the filtering effect on the wastewater and comprises a multi-medium filter for filtering impurities and a reverse osmosis device for desalting the wastewater. The power plant wastewater treatment system has the beneficial effects that some solid impurities in power plant wastewater can be filtered through the softening pretreatment assembly, the crystallization phenomenon in an existing wastewater treatment system is greatly reduced, the treated wastewater can be further filtered through the membrane concentration assembly, salt in the wastewater can be concentrated and separated, the discharge amount of strong brine is reduced, and the treatment cost is reduced. In addition, reverse osmosis produced water and reverse osmosis concentrated water produced by the reverse osmosis device can be respectively supplemented for boiler water and desulfurization water, so that the recycling rate of wastewater is increased.

The invention discloses a metal sintering filter and an online cleaning method, the filter comprises a cylinder body, a cylinder cover, a metal sintering filter core and an ultrasonic cleaning device, the cylinder cover and the cylinder body are detachably connected through a bolt, and a sealing structure is arranged between the cylinder cover and the cylinder body; an annular ultrasonic probe is installed at a flange connector in the middle of the inner wall of the barrel through a connecting part, the probe extends into the barrel and surrounds the metal sintering filter element, and all-directional cleaning is achieved by means of the penetrating power of ultrasonic waves. The online cleaning method sequentially comprises the steps of emptying and isolating, reverse blowing of inert gas to remove large particles, acid chemical cleaning and ultrasonic deep cleaning cooperative treatment, boiler water rinsing and neutralizing and drying and resetting. Online efficient decontamination can be completed without disassembling the filter element, the filtering performance of the filter element can be effectively recovered, operation is convenient, stability is high, and the filter element can be widely applied to various filtering scenes needing frequent cleaning.

The invention relates to a straw combustion boiler and a straw combustion heating system. The boiler comprises a combustion chamber and an ash pool, a water fire grate is fixedly arranged between the combustion chamber and the ash pool, a first double-layer plate water-cooled wall is arranged on the outer side of the combustion chamber and on a boiler arch, one end of the water fire grate is communicated with a water return port of the boiler, the other end of the water fire grate is communicated with the first double-layer plate water-cooled wall, a primary air supply pipe is arranged below the water fire grate, and a secondary air supply pipe is arranged on the side wall of the combustion chamber. The heating system comprises a boiler, a water tank, a water supply drum and a water return drum, the water tank is connected with a water inlet of the boiler through a water pipe, a smoke outlet of the boiler is connected with the water supply drum, the water supply drum is connected with a smoke inlet of the water return drum, and the water return drum is connected with a chimney; a water outlet of the boiler is connected with a water inlet of the water supply boiler barrel, a water outlet of the water supply boiler barrel supplies water to users, user return water is connected with the water return boiler barrel through a water return pipe, and the water return boiler barrel is connected with the boiler. The straw combustion efficiency is high, coal can be replaced, and the condition of the same room temperature is achieved.

The invention provides an automatic online cleaning method for a chemical filter, which comprises the following steps of: when a controller meets a triggering condition, closing a filter inlet valve and a filter outlet valve, and opening a residual material emptying valve and a top exhaust valve until residual materials are emptied; the triggering condition comprises that the controller monitors that the reading of the differential pressure gauge reaches a preset first differential pressure threshold value; closing the residue discharge valve, opening a water valve of the boiler to inject cleaning water into the filter through a flushing spray head, and after the reading of the liquid level meter reaches a preset height, opening a steam valve to introduce steam into the cleaning water to carry out bubbling stirring and heating until the reading of the thermometer reaches a preset temperature; and emptying the waste liquid, re-injecting the material into the filter, and closing the top exhaust valve and the filter inlet valve after the filter is full, so that the filter is recovered to a standby state. Full-automatic, intelligent and high-efficiency online cleaning of chemical filters, especially filters used in a butyl acrylate production process, is realized.

The utility model relates to a boiler water-cooled wall maintenance robot and system.The boiler water-cooled wall maintenance robot comprises a robot body and a magnetic attraction module arranged on the robot body, and supporting wheels of the robot body at least can provide ascending driving force for the robot body under the first preset working condition; the robot body is connected with the hoisting device through a rope, and the hoisting device is used for providing ascending driving force for the robot body under the second preset working condition. According to the boiler water-cooled wall maintenance robot, the lifting driving force can be provided through the supporting wheels, the lifting driving force can also be provided through the hoisting device, and the situation that when the robot body is in the second preset working condition, the robot body falls off due to insufficient magnetic attraction force between the magnetic attraction module and the boiler water-cooled wall is avoided; and the reliability of the robot main body climbing on the boiler water-cooled wall is improved.

The application discloses a flue gas heat energy and condensate water utilization system, which comprises a boiler, a flue gas cooling device, and a deoxygenated water tank. The flue gas generated by the boiler combustion enters the flue gas cooling device through a first flue for cooling. The flue gas exchanges heat with the water in the condensate water tank, the water in the condensate water tank is heated, the flue gas is cooled, and the cooled flue gas is discharged through a second flue. The condensate water formed in the flue gas cooling process falls into the condensate water tank. The water in the condensate water tank is deoxygenated by the deoxygenated water tank and then flows back to the boiler. The flue gas heat energy generated by the boiler combustion is utilized, the slightly acidic condensate water generated by the flue gas is mixed with the slightly alkaline softened water and the boiler water, the acidic condensate water and the alkaline softened water and the boiler water are subjected to acid-base neutralization reaction, the flue gas is used to heat the condensate water, and the like, so that the flue gas condensate water does not contain acidic gas, and thus the flue gas condensate water is slightly alkaline water suitable for the utilization of the boiler.

The invention discloses a thermal power plant water vapor quality monitoring method and system based on a multi-mode situation awareness technology, and relates to the technical field of thermal power plant water vapor quality monitoring, and the method comprises the following steps: deploying sensors at raw water, circulating water, demineralized water, condensed water, boiler water and steam of a thermal power plant based on a thermal power plant thermodynamic system design drawing; performing data acquisition on water vapor, packaging acquired data points into data frames, adding source addresses and timestamp information, and establishing a water vapor monitoring database for data recording; for equipment related to different water vapor collection positions in the current thermal power plant, equipment parameter adjustment values of historical equipment under the water vapor abnormal type event are collected, and a standard parameter adjustment value interval is calculated based on standard equipment to determine standard equipment adjustment parameters. According to the invention, by integrating historical data and real-time monitoring data, an equipment personalized compensation mechanism and an intelligent decision-making model are established, and accurate monitoring and efficient adjustment of water vapor abnormity are realized.

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.

An apparatus for steam reforming includes a reactor, a condensate separator, a condensate stripper, and a steam boiler. The reactor produces hydrogen and is connected to the condensate separator such that a gas mixture is conducted from the reactor into the condensate separator. The condensate separator and the condensate stripper are connected so that condensate separated out in the condensate separator is conducted into the condensate stripper. The condensate separator and the steam boiler are connected such that cleaned condensate can be conducted into the steam boiler. The steam boiler is connected to the reactor and to the condensate stripper in a steam-conducting manner. The boiler water feed line of the steam boiler is connectable to the condensate stripper in a liquid-conducting manner. A supply from the boiler water feed line is at a same location of the condensate stripper as a supply of the condensate from the condensate separator.

The present application relates to a special coating for water-cooled wall surface of coal-fired boiler, in particular to a coating for water-cooled wall surface of coal-fired boiler, a preparation method and application thereof. The coating comprises nano-tungsten powder, tungsten carbide, rare earth compound, sodium borate, potassium chromate, rock asphalt, binder, modifier, dispersant, defoaming agent, curing agent and solvent. The coating is fused on the water-cooled wall surface of coal-fired boiler, the obtained coating has good interface bonding with the water-cooled wall base material, low porosity, avoids the penetration of corrosive gas and liquid, solves the corrosion problem of water-cooled wall, and also avoids the reduction of coating hardness and wear resistance; the coating is not easy to wear and damage in long-term use, can improve the high-temperature resistance, hardness, corrosion resistance and wear resistance of the water-cooled wall surface of boiler, effectively prolongs the service life of the water-cooled wall surface of boiler, and further ensures the safe and stable operation of coal-fired boiler.

The invention provides an intelligent operation control system and method for a waste heat boiler, and belongs to the field of boiler control, and the intelligent operation control system comprises a boiler water supplementing subsystem which is used for continuously supplementing water and adjusting the liquid level of a heat balance storage tank; the steam heating subsystem is used for heating boiler water and adjusting the temperature; the boiler water circulation subsystem is used for carrying out circulation heat exchange and adjusting pressure; the automatic control subsystem is used for collecting a liquid level signal, a temperature signal, a pressure signal and system operation working condition parameters of the heat balance storage tank in real time, and carrying out working condition self-adaptive weight distribution and multi-loop coordination control based on the liquid level signal, the temperature signal, the pressure signal and the system operation working condition parameters; and multivariable abnormal evaluation and hierarchical protection control are carried out on the operation state of the waste heat boiler. The operation stability and control precision of the waste heat boiler are improved, temperature overshoot and unnecessary protection shutdown are reduced, and the service life of equipment is prolonged.

The utility model discloses a boiler water replenishing pretreatment device, and belongs to the technical field of boiler water replenishing treatment equipment. Comprising a water replenishing tank, a sterilization treatment unit, a multi-stage physical filtering unit and a deep treatment unit, the sterilization treatment unit comprises a bactericide adding module and a metering pump; the multi-stage physical filtering unit comprises a multi-medium filter, an activated carbon filter and a precision filter; the deep treatment unit comprises a high-pressure pump and a reverse osmosis membrane assembly; the multi-medium filter, the activated carbon filter, the precision filter, the high-pressure pump and the reverse osmosis membrane assembly are connected through a first pipeline, the water supplementing pool is connected with the multi-medium filter through a second pipeline, the bactericide adding module and the metering pump are connected into the second pipeline through a third pipeline, and a variable frequency water pump is arranged on the second pipeline; the boiler replenishment water pretreatment device can effectively sterilize raw water, remove suspended solids and residual hardness, avoid subsequent pollution of hollow fiber membranes, and improve the quality of boiler replenishment water.

The application discloses a flexible adjustable waste heat utilization hot water system and method for tail of waste heat boiler, which is suitable for the waste heat boiler configured by a gas-steam combined cycle unit, designs a combined application process route of the waste heat utilization hot water system for the tail of the waste heat boiler and a bromine cooling machine energy supply, utilizes existing condensate water, a condensate water heater and a boiler water supply system, circulates working medium through a hot water circulating pump, and realizes energy supply of the bromine cooling machine; the control mode in the system shutdown, startup and regulation stages is introduced, the working medium flow is regulated by frequency conversion and distribution regulation, the working medium temperature is regulated by low-temperature, medium-temperature and high-temperature three-stage temperature regulation, and the energy supply process of the waste heat utilization hot water system for the tail of the waste heat boiler can be flexibly adjusted.

The invention belongs to the technical field of boiler water-cooled wall monitoring, and particularly relates to a boiler water-cooled wall lower header expansion monitoring sensor arrangement method. Comprising the following steps: S1, determining the positions of expansion measuring points arranged on a lower header and a water wall tube seat; s2, when the expansion measuring points are arranged, temperature measuring points are arranged in areas nearby the expansion measuring points; the arrangement of the expansion measuring points is adjusted according to the distribution condition of the temperature field; s3, determining the type of the expansion monitoring sensor; s4, installing an expansion monitoring sensor at the selected position of the expansion measuring point; according to the arrangement method of the expansion monitoring sensors for the lower header of the water-cooled wall of the boiler, aiming at the current situation that displacement monitoring of the lower header of the water-cooled wall is lacked, comprehensive and real-time monitoring and dynamic early warning of the running state of the lower header of the water-cooled wall are achieved by adding the expansion monitoring sensors, and the accuracy and reliability of monitoring data are improved.

The utility model discloses a water softening device for a boiler, which relates to the field of water treatment equipment and comprises a box body, a partition plate is arranged in the box body to form a first chamber positioned above the partition plate and a second chamber positioned below the partition plate, and the first chamber is communicated with the second chamber through a chamber connecting pipe; the softening assembly comprises sliding grooves formed in the inner walls of the two sides of the first cavity and filtering boxes installed in the sliding grooves in a sliding mode; one end of the water distribution pipe is externally connected with boiler water, the other end of the water distribution pipe penetrates into the first cavity and is connected with a water distributor arranged above the filter box, and a plurality of water distribution holes are formed in the water distributor and used for uniformly distributing water to the filter box; one end of the second chamber water outlet pipe is communicated with the second chamber, the other end of the second chamber water outlet pipe is connected with the boiler, and water in the second chamber is discharged into the boiler. According to the utility model, a split type structure is adopted, and the softening assembly is of a detachable structure, so that ion exchange resin which is lost after long-term use is convenient to replace.

The utility model relates to a cleaning device and a boiler water-cooled wall maintenance robot, the cleaning device comprises a rotating roller and a plurality of bristle groups arranged on the rotating roller, the plurality of bristle groups are arranged in the circumferential direction of the rotating roller, and the lengths of bristles of the plurality of bristle groups are different in the radial direction of the rotating roller. According to the boiler water wall cleaning device, the multiple bristle sets with the different lengths are arranged on the rotating roller, when the rotating roller rotates, the multiple bristle sets with the different lengths can clean the boiler water wall at the same time, the cleaning effect is good, the time for replacing bristles according to different impurities during cleaning can be omitted, and the cleaning efficiency can be improved.

The isothermal adiabatic coupled shift reactor comprises a furnace body, the top of the furnace body is provided with a crude synthesis gas main inlet, a crude synthesis gas preheating outlet and a high-pressure saturated steam outlet, and the bottom of the furnace body is provided with a shift gas outlet; the furnace body is sequentially divided into an isothermal section and a heat insulation section from top to bottom; a crude synthesis gas side inlet is formed between the isothermal section and the heat insulation section of the furnace body; a high-pressure boiler water inlet and a crude synthesis gas preheating inlet are formed in the furnace body, close to the crude synthesis gas side inlet, of the isothermal section; the high-pressure boiler water inlet is communicated with the high-pressure saturated steam outlet after passing through the isothermal section; and the crude synthesis gas preheating inlet is communicated with the crude synthesis gas preheating outlet after passing through the isothermal section. The shift reactor can cope with different driving working conditions, load changes and other conditions, meanwhile, the working conditions can be flexibly adjusted, the process is short, the total investment of equipment is small, high-pressure superheated steam can be produced as a byproduct, and the energy utilization rate is increased.

1. Name of the design product: air outlet (wall-mounted air). 2. Use of the design product: used for blowing air to the tube wall of boiler water cooling wall. 3. Design points of the design product: in shape. 4. Picture or photo best indicating the design points: perspective view 1.

The invention discloses a deep learning-based boiler water-cooled wall coking intelligent identification method. The method comprises the following steps of S1, data acquisition, S2, preprocessing of original image data, S3, feature extraction and classification of preprocessed images, S4, coking identification by using a deep learning model, and S5, output of an identification result. According to the method, by integrating multi-source data acquisition, self-adaptive preprocessing and a deep learning model, high-precision and automatic recognition of boiler water-cooled wall coking is achieved, and the defects that a traditional method depends on manpower and is prone to being interfered by the environment are effectively overcome. According to the method, the coking forming process can be monitored in real time, and potential risks are warned in advance, so that the boiler operation safety and efficiency are improved, and the maintenance cost is reduced; meanwhile, through transfer learning and multi-scale feature fusion, the robustness and adaptability of the model under complex working conditions are enhanced, and reliable technical support is provided for operation and maintenance of an intelligent power plant.

The invention discloses a waste incineration waste heat boiler efficient circulating system and a control method thereof, and relates to the technical field of waste incineration treatment. The device comprises a steam pocket; a lower header; a downcomer mother pipe; the high-temperature through-flow type furnace water pump is fixedly mounted on the downcomer mother pipe; a water cooled wall; a frequency converter; the monitoring unit comprises a first flow sensor, a temperature sensor and a second flow sensor; and a controller. According to the efficient circulating system of the waste incineration waste heat boiler, the water vapor circulating speed in the water cooling wall can be increased, uneven local heating of the water cooling wall and vaporization overheating of working media in the pipelines are avoided, it is guaranteed that the flow of all the pipelines of the water cooling wall is uniform, thermal stress is reduced, and the temperature deviation of the water cooling wall is reduced; in the starting or load changing stage, sufficient water power is provided, water circulation stagnation is prevented, the influence of non-uniform flue gas flow field can be counteracted, the problem of heat exchange dead points is solved, scaling corrosion is restrained, and the advantages of being efficient, stable, economical and long in service life are achieved.

The utility model discloses a boiler water-cooled wall single sheet hoisting structure, a water-cooled wall single sheet is provided with a plurality of mutually parallel furnace tubes, two adjacent furnace tubes are connected through flat steel, the hoisting structure comprises a hoisting positioning hole and a hoisting tool, the hoisting positioning hole is arranged at the upper part of the flat steel, the hoisting tool is matched with the hoisting positioning hole, the hoisting positioning hole is a vertical long hole, and the hoisting tool is matched with the hoisting positioning hole. The hoisting tool is provided with an inserting plate matched with the vertical long hole, the inserting plate is limited through a plug pin, the inserting plate is connected with a hoisting lug plate through a connecting steel plate, the hoisting lug plate is parallel to the inserting plate, and a hoisting hole and a hanging rope penetrating hole are formed in the hoisting lug plate. The vertical hoisting positioning long holes are formed in the connecting flat steel of the water-cooled wall single piece, the hoisting tool with the inserting plate is inserted into the hoisting positioning long holes, the bolts are adopted for connection, mounting and dismounting are easy and convenient, mounting can be rapidly completed, then lifting can be carried out, and after lifting is completed, dismounting and withdrawing can be rapidly carried out, operation is easy and convenient, and cost is low. The efficiency is high.

The application discloses a kind of boiler water-cooled wall three-dimensional wall temperature coupling calculation methods, belong to boiler hydrodynamic calculation field, it is by constructing boiler and water-cooled wall model, carries out full furnace combustion numerical simulation and exports the heat flux density distribution of furnace water-cooled wall, convective heat transfer coefficient and working medium temperature;Again by for each calculation module design wall surface temperature distribution calculation method, can accurately calculate to obtain the water-cooled wall circumferential temperature field in calculation module, determine the water-cooled wall of calculation region and fire side temperature, back fire side temperature and pipe inner wall temperature, complete the calculation of water-cooled wall three-dimensional wall temperature.The boiler water-cooled wall three-dimensional wall temperature coupling calculation method in the application, its steps are simple, convenient to calculate, can accurately obtain the detailed distribution of water-cooled wall pipe wall temperature of boiler under different loads and water-cooled wall pipe circumferential temperature distribution, realize the accurate prediction of boiler heating surface wall temperature, provide basis for the optimization of heating surface, and provide guarantee for the safe operation of boiler.

A condition monitoring and failure early-warning system for a boiler water-cooled wall of a power station, comprising an on-site collection system, a superordinate computer system, and a network communication system. The on-site collection system comprises a plurality of measurement devices and data acquisition devices arranged on the boiler water-cooled wall; the data acquisition devices are connected to the superordinate computer system by means of the network communication system. The superordinate computer system comprises a computer simulation system and a failure early-warning system. The computer simulation system obtains a digital twin model comprising temperature field and stress field distributions of the entire boiler water-cooled wall. On the basis of on-site measurement point data, the failure early-warning system calculates simulation data to perform safety evaluation and provide predictive alarms; and online safety evaluation and intelligent failure early-warning are performed on the boiler water-cooled wall, thereby greatly improving the early warning accuracy.