1332 results about "Boiler water" patented technology

The invention discloses a boiler state monitoring and predicting system based on artificial intelligence, and relates to the technical field of state monitoring. The system comprises a data acquisition part, a combustion stability analysis part, a hydrodynamic instability risk assessment part, a steam drum water level fluctuation prediction part and a fault probability and service life assessment part. The data acquisition part is used for acquiring boiler operation data and water circulation data; the combustion stability evaluation part is used for calculating a thermodynamic efficiency index; the combustion stability analysis part is used for calculating a combustion stability coefficient; the hydrodynamic instability risk assessment part is used for calculating a hydrodynamic instability risk index; the steam drum water level fluctuation prediction part is used for calculating and predicting steam drum water level fluctuation; and the fault probability and service life evaluation part is used for evaluating the fault probability and the residual service life of the boiler. According to the invention, the comprehensiveness, accuracy and predictability of boiler operation state monitoring are obviously improved.

The invention relates to the field of intelligent control, and provides an automatic control system and method for a hot water boiler, and the method comprises the steps: firstly collecting water temperature data in real time to construct a time step data set of the water temperature data, extracting current water temperature information from the time step data set, and obtaining target water temperature data set by a user from a background database; then, the real-time deviation value between the current water temperature and the target water temperature is calculated, the deviation value is input into a PID controller to generate a control instruction comprising a burner firepower adjusting value, the proportionality coefficient, the differential coefficient and the integral coefficient of the controller are dynamically determined according to the time step data set of the water temperature data, and finally, the control instruction comprising the burner firepower adjusting value is generated. And the burner is accurately controlled according to the control instruction, so that the real-time adjustment of the water temperature is realized. Therefore, the water temperature of the hot water boiler can be automatically and intelligently adjusted and controlled.

The invention discloses a preparation method of a ceramic particle reinforced high-temperature alloy wear-resistant coating of a boiler water-cooled tube. The preparation method comprises the following steps: carrying out roughening treatment on a matrix; the prepared NiCr powder and ZrB2 powder are subjected to high-energy ball milling and mixing, drying is conducted after treatment, and dried NiCr-based composite powder is obtained; niCr-based composite powder is sprayed through atmospheric plasma, and a composite coating with the thickness ranging from 200 micrometers to 300 micrometers is deposited on the roughened surface of the base body; the composite coating is subjected to remelting treatment, and a remelting coating is formed on the surface of the base body; wherein the matrix is 304 stainless steel, and the composition proportions of the NiCr powder and the ZrB2 powder are as follows: 80-99 wt% of NiCr and 1-20 wt% of ZrB2 respectively; by means of the method, the wear resistance of the coating is remarkably improved, and controllable deposition of the high-performance ceramic particle reinforced high-temperature alloy wear-resistant coating is achieved.

The embodiment of the invention provides a method, a system and equipment for predicting the corrosion rate of a water wall tube of a boiler and a storage medium. The method comprises the following steps: acquiring corrosion related parameters of the water wall tube, including electrochemical noise, surface strain, medium components and temperature and humidity; performing space-time alignment and fusion processing on the corrosion related parameters to obtain a corrosion state feature matrix; inputting the corrosion state characteristic matrix into a pre-established physical characteristic extraction model, and dynamically predicting the corrosion rate of the water wall tube by adopting a space-time dual-channel network; wherein the physical feature extraction model is pre-established through a physical information neural network, and the space-time dual-channel network comprises a long short-term memory network, a graph convolutional network and a sliding window. According to the embodiment of the invention, various factors influencing corrosion are comprehensively considered, the physical information neural network is introduced to carry out deep autonomous learning, finally, a reliable corrosion rate prediction condition is provided, and dynamic, lasting, intelligent and flexible corrosion state monitoring and prediction of the boiler water wall tube are realized.

The invention provides a power plant boiler water cooling wall scaling intelligent prediction and cleaning method and system, and relates to the technical field of scaling prediction and cleaning, and the method comprises the steps: collecting operation parameters to construct a time sequence data matrix, extracting features to determine a scaling detection area, obtaining three-dimensional point cloud data, calculating scaling thickness distribution, and determining a to-be-cleaned area; and grid division is carried out on the cleaning area, a traversal sequence is optimized, and a collision-free cleaning track is generated. Precise identification and intelligent cleaning of the scaling area are achieved, the cleaning efficiency is improved, energy consumption is reduced, and the service life of the water cooling wall is prolonged.

The invention discloses a boiler water energy-saving and emission-reducing agent, and relates to the technical field of boiler energy conservation, and the boiler water energy-saving and emission-reducing agent is prepared from the following components: 1, 3-bis ((trihydroxymethyl) methylamino) propane, sodium lignin sulfonate, caffeine, (3, 6-diamino-9-acridinyl) boric acid, a functional copolymer, sodium glycyrrhizinate, hydroxypropyl beta-cyclodextrin and deionized water. The functional copolymer comprises a structural unit introduced by the following monomers: N-acryloyl morpholine, 3-[N, N-dimethyl-[2-(2-methylpropyl-2-enoyloxy) ethyl] ammonium] propane-1-sulfonic acid inner salt, N-trihydroxymethyl methacrylamide, and 2-[3-(2H-benzotriazole-2-yl)-4-hydroxyphenyl] ethyl 2-methacrylate. The agent has remarkable scale and corrosion inhibition effects, is safe and environment-friendly to use, and has good energy-saving and emission-reducing effects.

The invention discloses an intelligent regulation and control system and method for adding phosphate into boiler water, the system comprises a data acquisition / conversion unit and an intelligent regulation and control early warning unit connected with the data acquisition / conversion unit, and the intelligent regulation and control early warning unit comprises a storage calculation module, an intelligent control module, a report statistics module and an alarm diagnosis module; the storage calculation module is used for calculating a boiler water pH theoretical calculation value according to a boiler water pH theoretical calculation model, calculating a boiler water PO4 < 3-> concentration prediction value according to a boiler water PO4 < 3-> regression prediction model, comparing the boiler water pH theoretical calculation value and the boiler water PO4 < 3-> concentration prediction value with a control target value, sending a feedback instruction to a frequency converter of a dosing pump, and remotely regulating and controlling the frequency of the dosing pump to change the dosage. The precision and intelligent level of boiler water phosphate dosing control is improved, the measurement influence, human intervention and agent waste are reduced, and it is guaranteed that the water quality of subcritical unit boiler water is stable and qualified for a long time under the working condition of deep peak regulation.

The present disclosure refers to a method for building a SERS substrate from metal nanoparticles for determining the content of phosphonate-based scale inhibitors present at low concentrations in water using surface-enhanced Raman spectroscopy (SERS). The substrates also are used in detergent and dispersant products, in corrosion inhibitors and in water treatment systems in general, such as cooling water and boiler water, in addition to being applied in other fields such as the textile, concrete and paper industries.

The utility model discloses a boiler water level gauge tube explosion automatic closing device which is arranged between a boiler drum and a glass tube water level gauge and comprises a boiler connecting flange, an automatic closing tube and a water level gauge connecting flange. The automatic closing pipe comprises a straight pipe section and a bent pipe section; the straight pipe section sequentially comprises a first concentric reducer, a sealing equal-diameter tee joint, a second concentric reducer and a reducer tee joint; the bent pipe section sequentially comprises a first long-radius elbow, a check valve, a second long-radius elbow and a sealing ball; the first long-radius elbow is connected with the sealing equal-diameter tee joint, and the second long-radius elbow is connected with the reducing tee joint. When a pipe explosion accident occurs, the device can be closed in time, a large amount of water and steam are prevented from being sprayed out, the influence of the accident is effectively reduced, the sweep range is reduced, and the accident loss is reduced. The utility model has the advantages that the water level gauge communicating pipe can be automatically closed after pipe explosion, the accident influence is reduced, and the loss is reduced.

The utility model discloses a dosing device for boiler water treatment, which comprises a bottom plate, a medicine cylinder is fixedly mounted at the top of the bottom plate, a cover plate is fixedly mounted at the top of the medicine cylinder, square tubes are fixedly mounted on two sides of the top of the cover plate, strip-shaped grooves are formed in two ends of each square tube, and the strip-shaped grooves are communicated with the bottom plate. Springs are fixedly installed at the bottom ends of the interiors of the square pipes at equal intervals, movable plates are movably installed in the strip-shaped grooves, and vertical plates located in the square pipes are fixedly installed between the movable plates. According to the chemical adding device for boiler water treatment, in the daily use process, an operator starts a rotating motor, the rotating motor operates to enable a rotating shaft and a cam to rotate, then the outer surface of the cam touches the top of a carrying plate every time the outer surface of the cam rotates by a circle, and at the moment, the carrying plate drives a vertical plate to slide in a square pipe; and then, the vertical plate can drive the moving plate to slide in the strip-shaped groove, and meanwhile, the vertical plate can compress the spring.

The invention relates to the technical field of electrical performance testing, in particular to a power station auxiliary machine fault diagnosis method and system oriented to a smart factory, and the method comprises the steps: obtaining a current sequence, a power sequence and a vibration sequence of a boiler feed pump; equally dividing the collection duration into a plurality of time periods, and determining the abnormal vibration value of the boiler feed pump in each time period; determining trend noise significance of the power sequence and the current sequence in each time period; determining a current power influence value of each time period based on the trend noise significance, the correlation between the current sequence and the power sequence in each time period and the distribution condition of power data; and based on the dispersion degree of the difference between the vibration abnormal value and the current power influence value and the distribution range of the vibration abnormal value, determining the load vibration difference of the boiler feed pump, and performing fault diagnosis on the boiler feed pump. The invention aims to improve the accuracy of fault diagnosis of the boiler feed pump.

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 relates to a method and device for evaluating the rapid load changing capacity of a coal-fired unit, and the method comprises the steps: firstly, building a coal-fired unit dynamic model which comprises a coal pulverizing system, a boiler and a steam turbine through historical operation data, and determining model parameters based on the operation characteristics of an actual unit; secondly, main steam pressure and power instructions of different load sections are set according to the sliding pressure curve, a variable load capacity test is carried out by adopting a method of increasing the load increasing rate, and meanwhile, the coal feeding amount, the boiler water feeding amount and the adjusting range and the changing rate of a main steam valve are restrained; finally, dynamic changes of key parameters such as main steam pressure and steam-water separator outlet temperature in the variable load process are analyzed, and the actual average load rising rate of the unit is evaluated. According to the invention, the variable load capability of the unit in different load intervals can be accurately evaluated. Therefore, the problems that in the prior art, the load changing capacity of a unit in different load intervals is difficult to accurately evaluate, and the stabilization of new energy power generation fluctuation and the stability of power grid frequency are greatly influenced are solved.

The present invention relates to a preparation method of a self-propagating anti-corrosion and wear-resistant coating for a boiler water wall, belonging to the technical field of high-temperature protective coatings. The preparation steps are as follows: (1) Aluminum powder, iron(III) oxide powder, chromium oxide powder, zirconia fine powder, alumina fiber, heat-conducting filler and flux are ball-milled and mixed to obtain a mixed powder; (2) The mixed powder and sodium silicate binder are mixed evenly to obtain a suspension slurry; (3) The surface of the boiler water wall is treated by sandblasting; (4) A precoating is made on the surface of the boiler water wall; (5) A sodium silicate layer is made on the precoating; (6) A magnesium strip is ignited to initiate a self-propagating reaction to obtain a protective layer; (7) The protective layer is removed to obtain a self-propagating anti-corrosion and wear-resistant coating on the surface of the boiler water wall. The sodium silicate used as the binder obtains a dense self-propagating anti-corrosion and wear-resistant coating, and the self-propagating anti-corrosion and wear-resistant coating has good thermal conductivity, uniform thickness, excellent mechanical wear resistance and good corrosion resistance.

The invention discloses a once-through furnace water supply system coupled with a steam feed pump set and a hydraulic turbine booster pump set and a control method. Compared with a conventional once-through furnace water supply system, the once-through furnace water supply system is coupled with a full-flow water supply bypass system comprising a water supply bypass header, the hydraulic turbine booster pump set, a water storage tank and other equipment; the device is put into use during deep peak regulation of the once-through furnace. Detailed control strategies are elaborated on the basis and include control methods of the full-flow water supply bypass system in different stages of commissioning, dry-wet state conversion and the like. According to the method, the economical efficiency and the adjusting performance of the direct-current furnace during deep peak shaving are improved, the inlet flue gas temperature and the denitration efficiency of the SCR denitration system can be increased by improving the dry-wet state conversion load point of the direct-current furnace, and the environment-friendly performance of the direct-current furnace during deep peak shaving is improved.

The utility model relates to a WSC boiler tail convection heating surface flue gas temperature adjusting device which comprises a flag-shaped pipe heat exchanger water side bypass pipeline, a valve set, a first adjusting valve, a second adjusting valve and a third adjusting valve are arranged on the flag-shaped pipe heat exchanger water side bypass pipeline, one end of the first adjusting valve is connected with an inlet of a boiler water inlet collecting box, and the other end of the first adjusting valve is connected with an outlet of a boiler water outlet collecting box. The other end of the first adjusting valve is connected with the valve set and the second adjusting valve, the other end of the second adjusting valve is connected with the third adjusting valve, an outlet of the flag-shaped pipe upper header and an inlet of the economizer distribution header, and the water side bypass pipeline is connected with the heat supply network water return pipeline through the valve set. The utility model has the advantages that the pressure is set by the pressure sensor, the pressure is controlled to adjust the opening of the bypass valve, the pressure is limited to adjust the opening amplitude of the bypass valve, and the amount of water entering the heating surface of the boiler is controlled according to the closing temperature, so that the vaporization heat absorption intensity of the heating surface of the boiler can be controlled, and the vibration amplitude of the boiler caused by the reduction of water flow is reduced.

The utility model belongs to the technical field of boiler blow-off, and particularly relates to a novel automatic blow-off device for a waste heat power generation boiler, which comprises blow-off pipelines, a control system, a detection device, a sampling pipeline and an electric valve, a plurality of blow-off pipelines are connected onto the waste heat boiler, and the sampling pipeline is also connected onto the waste heat boiler. An electrically operated valve is arranged on each blow-off pipeline, the detection device is connected to the sampling pipeline, the electrically operated valves and the detection device are electrically connected with the control system, and the electrically operated valves are sequentially and circularly opened. The detection device reflects the state of boiler water in the boiler in real time, when impurities in the boiler are increased to a certain value, the detection device feeds back a signal to the control system, and the control system controls the electric valves on the blow-off pipelines to be sequentially and circularly opened for blow-off. The pollution discharge efficiency is greatly improved, and the safe operation of boiler equipment is guaranteed.

The utility model is suitable for the technical field of boiler liquid medicine adding equipment, and particularly relates to an intelligent boiler liquid medicine adding device which comprises a supporting base, a medicine dissolving box and a boiler are arranged on the surface of the supporting base, a boiler water discharging pipeline is arranged on the side face of the boiler, and an intelligent controller is installed on the surface of the medicine dissolving box. A stirrer is arranged on the surface of the medicine dissolving box; and a metering pump is mounted on the surface of the supporting base. Through close cooperation among the intelligent controller, the metering pump and the on-line water quality monitor, the device can realize intelligent and automatic boiler dosing management. Compared with a traditional boiler dosing system, the boiler dosing system has the advantages that the defects of inaccurate manual operation, long reaction time, waste of chemicals and the like are effectively overcome, the dosing precision and the reaction speed are improved, the waste of the chemicals is reduced, the operation cost is reduced, and intelligent management of boiler water treatment is realized.

The invention discloses an implementation method of a single auxiliary machine steam pump RB of a circulating fluidized bed unit, which comprises the following steps: after the steam pump trips, the action condition of the steam pump RB: opening a front electric door and a rear electric door of a boiler water supply bypass adjusting door when the RB acts; when the RB acts, the current of the electric pump is 200A and the outlet pressure of the electric pump is more than 20MPa, an outlet regulating valve of the electric pump is opened to 35%; coordinating to a turbine following TF mode, and forcibly switching a unit operation mode to a sliding pressure mode; after RB occurs, AGC is automatically cut off, meanwhile, an instruction is sent to a DEH system, and a sequence valve is cut into a single valve; and when the load of the unit is reduced to the target load for 3 seconds or the operator presses down a steam pump RB ending button, the RB process is ended. The system has the advantages that after the single steam pump trips, the unit load is changed to the target load without manual intervention of an operator, so that the operation intensity of the operator in an accident state is greatly reduced, and the probability of misoperation of the operator is reduced; the load range of a boiler BT is increased from 80MW to 160MW when a steam pump trips out, so that a larger safe and stable operation space is provided for a unit; bT accidents are avoided, and the purpose of saving coal consumption is achieved.

The invention discloses a quantitative analysis method for frequency static stability of a power system. The quantitative analysis method comprises the following steps: acquiring data information of a target power system; performing refined modeling on the thermal power generating unit in the target power system; dynamically analyzing the change trend of the unit load, the water supply quantity and the fuel quantity of the target power system; obtaining a system static power frequency characteristic curve of the target power system when the frequency deviation is greater than a set range; and performing quantitative analysis of frequency static stability on the target power system. The invention also discloses a system for realizing the quantitative analysis method for static stability of the frequency of the power system. According to the method, through fine modeling, variation trend analysis, system static power frequency characteristic curve calculation and corresponding analysis of the thermal power generating unit, quantitative analysis of static stability of the frequency of the power system is realized on the basis of considering physical, control and protection processes of a boiler water supply system of the thermal power generating unit, and the reliability is higher; and the accuracy is better.

The invention provides boiler water-cooled wall mechanical cutting equipment and a using method.The equipment comprises a cutting support, a carrying component is arranged at the bottom of the cutting support, pipeline walking components used for binding the cutting support to a water-cooled wall pipe are arranged at the two ends of the cutting support, and a cutting sliding seat is arranged at the upper end of the cutting support in a sliding mode; a cutting component used for cutting a pipeline is arranged at the upper end of the cutting sliding seat, the cutting sliding seat is connected with a position adjusting component used for driving the cutting position of the cutting sliding seat to be adjusted, and a clamping and transferring component used for transferring the cut-off pipeline is further arranged at the upper end of the cutting sliding seat. A material carrying frame is fixedly arranged on the other side, opposite to the cutting component, of the cutting sliding base. The device is designed according to existing needs, power is provided for walking of the device in a holding mode, the safety of the device is improved by means of self-shrinkage of thread transmission, in addition, a cut pipe body can be stored, the problem that objects fall from high altitudes is solved, and the cutting safety is further improved.

The invention is suitable for the technical field of boiler water treatment, and provides a boiler water treatment system and a using method, the boiler water treatment system comprises a barrel assembly, and a treatment assembly is fixedly inserted into the outer top of the barrel assembly; the barrel assembly comprises a barrel part, and a filter screen part is arranged in the barrel part in a sliding fit mode. And the treatment assembly comprises a cover body part fixed to the outer top of the barrel body part in an inserted connection mode, a medicine guide part arranged in the barrel body part in a sliding fit mode, a medicine storage part fixed to the cover body part in an inserted connection mode and a rotating part arranged on the cover body part in a rotating fit mode. According to the boiler water treatment device, the technical problems that a chemical agent is added into boiler water through a common chemical agent adding structure, the amount of the chemical agent added at a time is too large, the chemical agent is difficult to fully react with the boiler water, and the later boiler water treatment process is affected to a certain extent are solved. The intermittent dosing process is achieved, and the treatment effect of the whole boiler water to be treated is improved.

The invention provides an ultra-supercritical boiler full-working-condition composite dry-wet state conversion system and method, and belongs to the technical field of coal power unit flexible transformation. The method comprises the steps that in the initial stage of starting of a coal power unit, a coal-fired boiler is in a wet state, and the coal-fired boiler is in a wet state; the wet water separated by the separator is recycled based on a boiler water recycling module and a drainage capacity expansion module; when the operation load of the coal-fired boiler ranges from the first preset load to the second preset load, the water level of a water storage tank of the boiler is controlled based on the boiler water recycling module, and a pipeline of the drainage expansion module is heated through wet water; when the second preset load reaches the third preset load, the boiler water recirculation module is closed, the drain capacity expansion module and the heat exchange deoxidization module are started, and the water level of the water storage tank is finely adjusted; and when the load is larger than the third preset load, the coal-fired boiler is switched into dry-state operation, and the drainage capacity expansion module and the heat exchange deoxidization module are closed. The working medium and heat of circulating water in the coal-fired boiler starting stage and the deep peak load regulation load can be recycled.

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 discloses a green ammonia synthesis system with flexible heat compensation, which belongs to the technical field of ammonia synthesis and comprises a synthesis gas mixer, a first pipeline, a second pipeline, a third pipeline, a start-up electric furnace, an ammonia synthesis tower, a fourth pipeline, a boiler water heat exchange device, a heat exchanger, a fifth pipeline, a cooling device, an ammonia separator and a liquid nitrogen storage tank. The third pipeline is respectively communicated with the second pipeline and the top end of the ammonia synthesis tower; the starting electric furnace is arranged on the third pipeline; the fourth pipeline is respectively communicated with the bottom end of the ammonia synthesis tower and the heat exchanger; the boiler water heat exchange device is arranged on the fourth pipeline; the fifth pipeline is respectively communicated with the heat exchanger and the ammonia separator, the cooling device is arranged on the fifth pipeline, and the ammonia separator is communicated with a liquid nitrogen storage tank pipeline. The system can be flexibly heated to activate or maintain the activity of the catalyst when the system is influenced by the fluctuation of new energy electric power such as wind, light and the like and runs at low load.

The invention discloses a waste heat type boiler water softening treatment device, and relates to the technical field of boiler water treatment. A treatment tank assembly comprises a tank body, supporting columns are installed at the two ends of the bottom of the tank body, a cover body is installed at the top of the tank body, a purification water tank is arranged at the top of the cover body, and a drainage pipe is connected to the left end of the bottom of the tank body; the right end of the bottom of the tank body is connected with a blow-off pipe and a stirring assembly, the stirring assembly is arranged in an inner cavity of the tank body and comprises a stirring shaft, the stirring shaft is connected to the inner bottom wall of the tank body through a bearing, the bottom of the tank body is provided with a driving part, and the top of the driving part is connected with the bottom of the stirring shaft. Through cooperative arrangement of the stirring shaft, the driving part, the stirring rod, the telescopic part and the scraping plate, when the driving part works, the stirring shaft rotates, and the driving part drives the stirring rod and the scraping plate to rotate, so that boiler water and resin in the tank body are stirred, adsorption of calcium and magnesium ions in the boiler water by the resin is accelerated, softening is more thorough, and the quality of the water is improved.

The embodiment of the invention relates to the technical field of boiler equipment, and provides a steam boiler real water level identification method and a related device, and the method comprises the steps: obtaining boiler steam temperature data and pressure data; determining a first boiler working state of the steam boiler according to the temperature data and the pressure data; if the first boiler working state is that a boiler burner is started or the power is changed, boiler water level image data are obtained; the real water level of the steam boiler is recognized according to the boiler water level image data, the recognition result of the real water level of the steam boiler is obtained, the working state that a boiler burner of the steam boiler is started or power changes can be recognized according to the temperature data and the pressure data in the boiler, and then the real water level of the steam boiler is recognized according to the boiler water level image data. The real water level of the steam boiler is identified, the false alarm probability of the false water level of a traditional water level gauge of the steam boiler is reduced, and the production efficiency is improved.

The invention provides a coupling distribution type energy waste heat and waste heat comprehensive utilization system and an operation method, a flue gas hot water heat exchanger is arranged at the tail of a waste heat boiler and used for converting flue gas waste heat into high-temperature hot water, and heat source water is provided for a boiler water supplementing preheating system, a water-water heat exchanger and a large-temperature-difference absorption type lithium bromide unit. The flue gas and hot water heat exchanger is arranged at the tail of the waste heat boiler, high-temperature hot water coming out of the tail of the waste heat boiler serves as a heat source of the external water-water heat exchanger and the large-temperature-difference absorption type lithium bromide unit, deep utilization of flue gas at the tail of the waste heat boiler is achieved, and low-temperature corrosion of a heating surface at the tail of the waste heat boiler is reduced; meanwhile, heat of sampling coolers, boiler fixed-connection sewage and waste steam condensation water returned from the outside of a plant is utilized in a gradient mode, a low-temperature heat pump unit and a solar photoelectric photo-thermal plate are adopted to provide cooling, heating and power loads for users, cross-seasonal heat storage water is coupled for cross-seasonal heat storage, and the energy utilization efficiency is improved.

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.