3646 results about "Combustion" patented technology

The invention relates to the technical field of combustion monitoring, and discloses a combustion instability boundary prediction system based on complex environment condition analysis, and the system comprises a multi-source sensing module, a data fusion module, an anti-interference processing module, an instability feature library, an intelligent decision engine and a digital twinborn body. A dynamic environment interference compensation mechanism is constructed, spectrum correction parameters are configured according to different environment working conditions during real-time prediction of a combustion instability boundary, the problem of spectrum distortion caused by environment disturbance on combustion dynamic parameters is eliminated in real time, spectrum interference deviation of a combustion measurement position can be automatically sensed and corrected, and real-time prediction of the combustion instability boundary is realized. The accuracy of combustion instability sensitive feature extraction is guaranteed, the instability early warning error is reduced, a flame pose real-time tracking system is deployed, fuel control parameter self-adaptive adjustment is triggered immediately when it is detected that the pose is abnormal, autonomous correction of the combustion instability feature recognition position is achieved, and it is guaranteed that the feature capture space is accurately positioned.

The invention discloses an intelligent control method and device for the urban solid waste incineration process, a medium and a product, and relates to the technical field of urban solid waste incineration. The method comprises the steps that the pusher speed, the fire grate speed, the primary air flow, the secondary air flow, the combustion time, the main steam flow and the furnace oxygen amount of the urban solid waste incineration process at the current moment are obtained; according to the pusher speed, the fire grate speed, the combustion time and the main steam flow at the current moment, the main steam flow at the next moment is determined through a main steam flow prediction model; according to the primary air flow, the secondary air flow and the furnace oxygen amount at the current moment, the furnace oxygen amount at the next moment is determined through a furnace oxygen amount prediction model; and in combination with a switching rule based on expert knowledge, a main steam flow controller and a furnace oxygen amount controller are solved by utilizing a gradient descent algorithm, and the optimal control rate is determined so as to control the urban solid waste incineration process. The solid waste treatment efficiency is improved, and rapid and stable control over the main steam flow and the furnace oxygen amount is achieved.

The invention discloses an optimal control method for a straw pyrolysis carbonization process. The method comprises: performing multipoint temperature real-time acquisition and data processing on a carbonization zone of a carbonization furnace, obtaining temperature information and calculating a deviation from a preset ideal temperature curve (S01); dynamically adjusting an operating parameter of the combustion zone using a control algorithm based on the temperature deviation (S02); performing on-line monitoring on the flue gas components (S03); and regulating and controlling the return air flow and the secondary air supply amount of the combustion area in a linkage manner according to the flue gas monitoring result so as to optimize combustion and energy recovery (S04). Through accurate and intelligent process control, efficient, environment-friendly and high-valued utilization of the straw carbonization process is realized.

The invention relates to the technical field of underground coal gasification, in particular to a coal underground gasification process stability monitoring and evaluating method which comprises the following steps: determining a space mapping relation between a gasifier temperature field and an acoustic emission event according to the temperature gradient and the acoustic emission event of a gasifier; carrying out three-dimensional inversion on a combustion cavity of the gasification furnace, and determining attenuation trends of the coal seam under different temperature gradients; according to the attenuation trend of the coal seam under different temperature gradients, the propelling direction of the boundary of the combustion cavity is determined by utilizing the spatial distribution density and the relative position of each acoustic emission event; according to the propelling direction of the fuel cavity boundary, boundary moving paths are formed, and the propelling area proportion of each position in the propelling direction is calculated according to the distance difference of the boundary moving paths; and according to the propulsion area proportion of each position in the propulsion direction and the expansion rate of the combustion cavity, determining the space stability classification of each part of the combustion cavity. The accuracy and the efficiency of monitoring underground gasification of the coal seam are realized.

The present invention relates to the technical field of signal processing and fault diagnosis. The method of the present invention comprises: collecting a flame chemiluminescence signal, and performing adaptive filtering noise reduction processing; using an improved proper orthogonal decomposition method and a high-order mode to obtain comprehensive combustion feature information; developing a real-time synchrosqueezing transform algorithm to perform time-frequency analysis on data, and updating energy distribution in real time; taking into account sensor data to perform multi-parameter joint analysis to obtain a combustion state evaluation, using a plurality of high-speed cameras to acquire flame images from different angles, reconstructing three-dimensional flame morphology by means of a computer vision technology, and providing fault detection information; and constructing a fault prediction model to give an early warning of a combustion fault. The present method implements nondestructive and rapid detection of oscillating combustion faults, keeps rich information of flame images, reflects overall flame pulsation characteristics, increases the speed and accuracy of detection, and compensates for the defect of low frequency resolution of conventional time-frequency analysis methods.

The invention relates to the technical field of coal gas molten salt heat storage, and discloses a steel mill coal gas molten salt heat storage system and a heat storage operation method and device.According to the coal gas molten salt heat storage system, a coal gas combustion unit adjusts heat power to output flue gas; the high-temperature heat exchange unit and the combustion unit are integrated, and fused salt is heated to the target temperature; the flue gas waste heat exchange unit uses waste heat flue gas flowing out of the high-temperature heat exchange unit as a heat source to heat low-temperature fused salt to medium temperature; the molten salt flow mixing unit realizes high-temperature molten salt flow division backflow and closed-loop circulation; the closed-loop control system dynamically adjusts the backflow proportion and the combustion power based on real-time data to ensure stable and efficient operation of the system, the problems that a blast furnace gas heat source is unstable, temperature rise of molten salt is limited and an existing system lacks dynamic control are solved, safe operation of the system is guaranteed, the service life of equipment is prolonged, and the energy utilization efficiency is further improved. And stable fused salt temperature output and energy efficiency optimization are realized.

The invention discloses a thermal power generating unit self-adaptive blending combustion method based on coal quality parameters. The thermal power generating unit self-adaptive blending combustion method comprises the following steps that S1, the coal quality parameters are obtained in real time; s2, digitizing the detected coal quality parameters, and inputting the digitized coal quality parameters into a system database; updating the digital twin model in real time based on the latest data; s3, dynamic characteristic analysis is carried out through a digital twinborn model, and the response of coal combustion is predicted; s4, generating a three-dimensional control matrix, and generating an optimal blending combustion proportion; performing dynamic compensation correction according to the real-time operation data; s5, issuing the optimized blending combustion instruction to a combustion system for execution; s6, the emission index and the combustion efficiency after combustion are monitored in real time; s7, carrying out deviation analysis on the collected operation data and an expected target; and S8, carrying out machine learning training on the actual blending combustion data and the theoretical model deviation. According to the method, the blending combustion proportion is dynamically optimized by generating the three-dimensional control matrix; the combustion boundary is predicted based on a transfer learning engine, rolling horizon optimization responds to deviation within 3 minutes, and it is ensured that pollutants do not exceed the limit.

The invention relates to the technical field of smoke exhaust waste heat recovery devices, and discloses a waste heat utilization and recovery device and method applied to boiler combustion smoke, and the waste heat utilization and recovery device applied to the boiler combustion smoke comprises a bottom frame, and a heat absorption mechanism, a middle section partition plate and a heat release assembly which are fixedly mounted at the top of the bottom frame in sequence; through the arrangement of the heat buffering assembly, when the temperature of smoke is high, the heat absorbing fins can absorb part of heat and conduct the heat to the medium storage cavity, a medium in the medium storage cavity absorbs the heat to be evaporated into gas, and the gas is filled with an inflatable heat conduction film through a gas flowing cavity; the inflatable heat conduction film is expanded to store the gaseous medium, the gaseous medium is dissipated when the smoke temperature is low, the gaseous medium is condensed into liquid after heat dissipation, then the liquid is absorbed by the liquid absorption core plate and returns to the medium storage cavity, and therefore heat transfer and buffering are facilitated, and damage of thermal shock to device parts is reduced.

The invention provides a coal mine ventilation air methane synergistic enrichment and fluidized heat storage combustion system and method. The system comprises an air shaft diffusion tower and a ventilation air methane collecting device, the method comprises the following steps: collection and compression of ventilation air methane, cooling and boosting adsorption of an adsorption tower, pressure drop equalization of the adsorption tower, temperature rise, pressure reduction and desorption of the adsorption tower, pressure rise equalization of the adsorption tower, periodic cycle work of the adsorption tower, preheating of a packed bed of a heat storage furnace, fluidized heat storage oxidation of coal gangue and gas, and waste heat recovery and utilization. According to the invention, safe and efficient enrichment of ventilation air methane can be realized, and fluidized heat storage oxidation coupling utilization of concentrated gas and coal gangue particles can be realized; the oxidation waste heat is used as a generator heat source; the carbon reduction scheme of large-scale separation and concentration-synergistic oxidation-efficient utilization of the oversize coal mine ventilation air methane is formed, the coal industry is assisted to achieve the goal of'two wastes' and sustainable development, and large-flow, low-cost, safe and efficient treatment and utilization of the ventilation air methane discharged by an oversize low-gas mine can be achieved.

The utility model discloses a jacket heat preservation flame arrester for high-oxygen VOCs (volatile organic compounds) to enter dry quenching, which belongs to the technical field of flame arresters and comprises two valve bodies respectively communicated with a gas pipeline for the VOCs to enter the dry quenching and a flame arresting screen arranged between the two valve bodies, a jacket capable of introducing steam to preserve heat is arranged between the two valve bodies, and the two valve bodies are communicated with a gas pipeline for the VOCs to enter the dry quenching. The jacket is arranged on the outer side of the fire-retardant screen; a jacket inlet communicated with a steam pipeline is formed in one side of the jacket, and a jacket outlet communicated with a drain pipeline is formed in the other side of the jacket. According to the utility model, the temperature around the fire-retardant screen can be ensured not to be lower than the crystallization temperature of naphthalene gas, so that the naphthalene gas in VOCs gas can smoothly pass through the fire arrester and then enters dry quenching for incineration, and the VOCs are really discharged without external emission.

The invention discloses a method for melting and smelting ferrochrome in an all-oxygen hydrogen-rich low-carbon furnace, which comprises the following steps: (1) proportioning and uniformly mixing chromite pellets, coke and lime according to the mass ratio of 1: (0.15-0.2): (0.08-0.15), and filling the mixture into the all-oxygen hydrogen-rich low-carbon furnace; (2) high-temperature hydrogen-rich gas at the temperature of 900-1100 DEG C is introduced into the middle of the furnace body, and selective reduction of ferrochrome oxide is achieved; blowing industrial pure oxygen at the lower part of the furnace body, combusting with coke to generate CO, and driving a secondary reduction reaction; (3) maintaining a high-temperature environment in the furnace through oxygen-fuel combustion to completely melt the materials into molten iron, and carrying out central stirring on the molten iron to form a vortex with the height-diameter ratio of 0.5-1.5; and (4) discharging the molten iron after the reaction is completed. According to the method, the reduction rate of chromium in the chromite exceeds 92%, the carbon emission is reduced by 40% or above compared with a traditional blast furnace and submerged arc furnace process, meanwhile, the method has the advantages of being high in smelting efficiency, low in energy consumption, stable in product quality and the like, and a low-carbon and efficient innovative path is provided for ferrochrome smelting.

The invention relates to the technical field of visual temperature fields, in particular to a power plant hearth visual temperature field anomaly identification and early warning method fused with AI analysis, which comprises the following steps: synchronously acquiring hearth radiation data, performing emissivity dynamic compensation by combining real-time coal quality parameters, and generating three-dimensional temperature field characteristic data; space-time fusion processing is carried out, space correlation characteristics are extracted through a graph convolution network coupled with hearth structure parameters, and space-time fusion data including temperature gradient distribution, heat flow evolution trend and coal type adaptability are generated; constructing a space-time transformer model fused with a memory enhancement mechanism, and outputting a dynamic risk tensor including an instability probability, a structural stress hot spot and a combustion efficiency loss coefficient; intelligent decision making is carried out, when the instability probability exceeds a load self-adaptive dynamic threshold value, a visual early warning instruction set is generated, and real-time closed-loop control is executed. Real-time closed-loop control is achieved through the edge controller, and the stability, safety and combustion efficiency of boiler operation are effectively improved.

The utility model discloses a seawater concentration bromine extraction system based on deep waste heat recovery and new energy driving, and belongs to the technical field of salt chemical industry and new energy. On the basis of an existing seawater concentration bromine extraction system, a new energy mode is adopted for process heating, and heat exchange jackets are arranged on the outer walls of a sulfur combustion furnace 1 and a high-temperature SO2 flue 3; low-temperature air is sequentially fed into a heat exchange sleeve 26 and a heat exchange sleeve 20 through an air feeder 21 and exchanges heat with high-temperature and high-corrosion flue gas in a flue and higher-temperature flue gas in a sulfur combustion furnace, then the low-temperature air is fed into a miniature high-temperature waste heat hot water boiler 10, water is fed into a heating furnace, and cooled flue gas is subjected to circulating heat exchange through the air feeder 21. High-temperature water of the miniature high-temperature waste heat hot water boiler 10 is fed into the flash tank 23 and generates flash steam, and after the temperature of outlet water is reduced, the outlet water returns to the flash tank 23 for circulating heat exchange. Flash steam of the flash tank 23 is mixed with steam produced by the high-temperature heat pump steam producing device 37 and the new energy electric heating steam furnace 38, and then the mixture is sent to the liquid chlorine water bath 51 and the like for process heating.

Electrical power derived from a renewable energy source is used to perform water electrolysis to produce oxygen and hydrogen. A flue gas and heat are produced from combustion of a fuel using at least a portion of the oxygen generated by electrolysis. A feed stream including hydrocarbon oil is hydroprocessed using the generated heat and at least a portion of the hydrogen generated by electrolysis to produce a product including a saturated hydrocarbon. At least a portion of the flue gas is hydrogenated using at least a portion of the hydrogen generated by electrolysis to produce a second product stream including a hydrocarbon, an oxygenate, or both.

The invention provides a combustion-supporting air preheating device for an annealing furnace, and relates to the technical field of air preheating combustion-supporting equipment, the combustion-supporting air preheating device comprises a preheating box, and a plurality of rows of preheating pipes are fixedly connected in the preheating box; a threaded propeller shaft is rotationally arranged in the preheating box and close to the leeward side of the preheating pipe, and a longitudinal guide shaft is welded in parallel in the preheating box and close to the threaded propeller shaft; the preheating pipe is sleeved with a retaining ring in a sliding mode, a gear ring is rotationally installed on the retaining ring, a retaining ring is welded to the gear ring, a small annular steel wire brush and a large annular steel wire brush are fixed to the inner circumference and the outer circumference of the retaining ring respectively, and brush wires on the annular steel wire brush on the inner side are evenly distributed on the inner circumference of a supporting ring of the retaining ring. Brush wires on the annular steel wire brush on the outer side are uniformly distributed on the periphery of a supporting ring of the annular steel wire brush; according to the preheating device, the trouble that the preheating device needs to be greatly disassembled to expose the preheating pipe, and then the preheating pipe can be cleaned can be omitted, and operation and use are easy, convenient and efficient.

The invention relates to the technical field of fire coal combustion control, and discloses a multi-working-condition fire coal combustion control system and method based on machine learning, and the system comprises an obtaining module which is used for determining a plurality of working condition types, obtaining a plurality of historical combustion logs, carrying out the feature extraction of the historical combustion data of the historical combustion logs, and obtaining a feature extraction result; obtaining combustion state data of each working condition category; the construction module is used for constructing a combustion state evaluation model and a combustion control model, and generating a real-time comprehensive combustion state evaluation value according to the combustion state evaluation model; the control module is used for judging whether optimization control is needed or not according to the real-time comprehensive combustion state evaluation value, and if yes, a first combustion control strategy is generated based on a combustion control model and a control instruction is issued; and the correction module is used for obtaining the real-time combustion state data based on the preset feedback time node and judging whether correction is carried out or not, if yes, a correction instruction is generated based on a preset correction reference library, and the fire coal combustion efficiency and the control efficiency are guaranteed.

The invention relates to the field of clean energy development and utilization, in particular to an underground coal gasification method with high-temperature steam as a gasifying agent and an experimental device. The method comprises the steps of exploration, well building, permeability increasing, gasification, coal gas utilization and waste treatment, the experimental device comprises a steam generator and a gasification furnace, the steam generator injects high-temperature steam into the gasification furnace, the high-temperature steam is used for coal gasification, in the gasification step, the high-temperature steam is injected into a coal seam, and the high-temperature steam is used for coal gasification. The high-temperature steam serving as a gasifying agent is subjected to a series of reactions with the coal, the high-temperature steam is gasified to generate coal gas through chemical reaction with the coal, and the high-temperature steam is also used for heating the coal to pyrolyze the coal to generate coal gas; according to the method, oxygen is not directly injected into the coal seam, the coal seam is not ignited, and combustion of coal is not involved, but high-temperature steam is injected into the coal seam, the underground coal gasification process is completed through the oxidation-reduction reaction and the distillation pyrolysis action of the high-temperature steam and the coal, and the raw gas is generated.

The invention discloses a gas-phase combustion model construction method based on a dynamic self-adaptive grid, which comprises the following steps: establishing a steady-state flame control equation set according to the property of target fuel, and obtaining laminar flame velocities and laminar flame thicknesses under different conditions; establishing an unsteady-state reactive Navier-Stokes equation set, performing spatial filtering on each variable in the equation set, and constructing a sub-lattice scale turbulence model; coupling a thickened flame model and a disturbance factor model in the filtered equation set; limiting the encrypted area of the self-adaptive grid near a flame surface through a flame detection function; and solving the equation set to obtain a variable of a next time step, updating a disturbance factor and the number of layers of the adaptive grid, and re-dividing the adaptive grid of the layered block structure to realize dynamic tracking of the flame position and real-time adjustment of the grid resolution. According to the method, the disturbance factor and the grid encryption layer number can be adjusted in real time based on the laminar flame speed and the flame thickness in the current state, and the combustion modeling precision and the calculation efficiency are improved.

The present invention proposes a B1-class halogen-free, low-smoke, flame-retardant special cable and its preparation method. The cable comprises: a cable core formed by wrapping a control core and a power core, a flame-retardant filling rope, a wrapping layer, a flame-retardant tape layer, a total shielding layer, a ceramic fireproof layer, and an outer sheath. The present invention uses a cross-linked polyethylene sheath to form an outer layer of protection, a ceramic fireproof layer to form an intermediate shell flame-retardant insulation layer, and a flame-retardant tape layer combined with expandable graphite as an inner layer of buffer insulation, thereby achieving multiple flame-retardant insulation for the cable core, inhibiting the release of burning drips and toxic smoke with corrosion, and meeting and exceeding the B1-class flame-retardant requirements. By using low-smoke, halogen-free materials, the release of toxic gases can be reduced during combustion. At the same time, a double-layer hardness flame-retardant filling rope is twisted in the core to make the cable more round as a whole, and to allow the flame-retardant material to be fully filled into the cable core, achieving a better flame-retardant effect, and having certain buffering, compression resistance, torsional resistance, and fatigue resistance effects, thereby improving the mechanical properties of the cable.

The invention discloses a semi-solid-state complex no-tillage dry direct seeding method for crop seeds. The no-tillage dry direct seeding method comprises the following steps: S1, keeping a water layer of 1cm-5cm in a ditch, and paving straws obtained by harvesting preceding crops on a ditch surface; S2, applying a base fertilizer on the ditch surface paved with the straws and cleaning the ditch; S3, seeding the crop seeds on the ditch surface, and mixing the crop seeds with semi-solid-state biomass materials, a compound fertilizer and a biopesticide before seeding before seeding seeds, wherein the mixing mass ratio is that the crop seeds to the semi-solid-state biomass materials to the biopesticide is (1-10) to (70-800) to (1-3), and the moisture content of the semi-solid-state biomass materials is 40%-80%; and S4, after seeding the seeds, keeping the ditch surface at a dry state for 3-7 days. According to the semi-solid-state complex no-tillage dry direct seeding method, tillage and combustion of winter crop straws are not carried out, a whole land of field immersing water is not used for irrigation and the water immerses after the seeding, and the biological benefits are obvious; the working energy consumption is reduced, stubbles are not killed by pesticides, haze is reduced and the irrigation water is reduced.

The invention discloses a three-dimensional combustion multi-parameter field inversion method based on two-dimensional infrared imaging and hyperspectral light field imaging, and belongs to the technical field of flame combustion detection. The invention aims to solve the problem of low reconstruction precision caused by limited spontaneous radiation information and poor low-temperature region signal sensitivity in the existing combustion flow field temperature field reconstruction. Comprising the following steps: obtaining a flame two-dimensional infrared temperature distribution image and a flame hyperspectral light field image; a two-dimensional blackbody radiation intensity curve and a three-dimensional blackbody radiation intensity curve are obtained through calibration according to the blackbody radiation law; combining the corresponding image gray values to obtain two-dimensional infrared radiation intensity, three-dimensional visible radiation intensity and three-dimensional infrared radiation intensity; determining a temperature threshold value of the high-temperature area; constructing a multispectral radiation source term matrix equation, and reconstructing a three-dimensional temperature field; obtaining a separated flame hyperspectral light field image, and reconstructing a low-temperature region and a reconstructed temperature field; and combining with a high-temperature region reconstruction temperature field to obtain a whole temperature field. The method is used for three-dimensional combustion multi-parameter field inversion.

A carbon dioxide recovery device provided with a separation device that separates carbon dioxide from to-be-separated gas (for example, combustion exhaust gas) containing carbon dioxide, wherein: in order from the upstream side where the to-be-separated gas is supplied, the separation device and carbon dioxide sublimators, which sublimate (solidify) carbon dioxide that was separated in the separation device, are connected in series, refrigerant circuits in which a fluid having cold heat serves as the refrigerant, are connected to the carbon dioxide sublimators, and the refrigerant is used to sublimate (solidify) the carbon dioxide; and when the carbon dioxide is sublimated (solidified), the carbon dioxide sublimators are depressurized and set to negative pressure so as to draw in the carbon dioxide separated at the separation device.

The invention discloses a metal product surface sealing device based on an underwater explosion cladding technology, and belongs to the technical field of metal surface treatment. A pressure-resistant cavity is formed in the sealing box body, a buffer supporting structure is arranged at the bottom of the sealing box body, and a fuel tank and a combustion-supporting gas input connector are arranged at the top of the sealing box body; the two oppositely-arranged fixing assemblies are arranged in the pressure-resistant cavity, and a base plate and a covering plate are arranged between the two fixing assemblies; the ignition assembly comprises a mounting shell, a pulse igniter, a safety interlocking module and a power management unit are integrally mounted in the mounting shell, and the gas circuit control system comprises a fuel conveying pipeline and a combustion-supporting gas input pipeline which communicate with a fuel tank. According to the device, efficient and safe operation of underwater explosion compounding is achieved through collaborative innovation of multiple assemblies, the adjustable fixing assembly guarantees the positioning precision of the base plate / covering plate, the intelligent ignition system avoids the ignition failure risk, gas path closed-loop control optimizes the explosion energy stability, and the service life of the device is prolonged through a buffer supporting structure.

The invention belongs to but not limited to the technical field of underground coal gasification, and discloses an underground coal gasification method and gas injection equipment. Constructing a directional drill hole and a gasification channel penetrating through the underground coal seam; a gas injection pipe with a plasma torch is put into the gasification channel, a gasification agent is injected, and in-situ gasification of the underground coal seam is implemented; and the generated gas is conveyed to the ground for collection through the drill hole. According to the underground coal gasification method and the gas injection equipment provided by the invention, the gasification agent is activated by the plurality of plasma torches arranged in the directional channel at the tail end of the gas injection pipe and then is directionally jetted to the coal seam, so that the gasification agent is in contact with the coal seam in a short time and is gasified, the directional conveying of the plasma gasification agent is realized, and the effective utilization rate of the plasma gasification agent is improved; meanwhile, a combustion space area of the coal seam after gasification can be expanded in a fan shape in the longitudinal direction with the gasification agent outlets of the plasma torches as the center, the expansion equivalent radius of the combustion space area is relatively large, and a large amount of coal can be gasified through one gasification channel.

The invention discloses an intelligent power plant boiler combustion optimization method, system and device and a storage medium, and relates to the technical field of intelligent power plant automatic control and energy management, and the method comprises the steps: building a boiler combustion model based on boiler operation parameters and historical working condition data; through data interaction with a DCS, boiler combustion real-time operation parameters are obtained, simulation optimization is executed according to a boiler combustion model, and air distribution proportion, ammonia spraying amount and air-coal ratio parameters are generated; real-time combustion adjustment is executed according to a simulation optimization result, and self-adaptive adjustment of the oxygen amount and the smoke temperature is completed under different load and coal quality conditions; and an optimization result is fed back to the DCS for control instruction execution, and online correction and verification are carried out in the boiler combustion model. According to the method, through closed-loop linkage of the boiler combustion model and the DCS, self-adaptive optimization and online correction of combustion parameters are achieved, the oxygen amount and the smoke temperature are dynamically regulated and controlled, the model is kept consistent with the working condition, and the combustion stability and energy efficiency of the boiler are improved.

The utility model relates to the technical field of on-line monitoring devices, and discloses a pulverized coal fired boiler combustion state on-line monitoring device which comprises a boiler shell, an ignition device is arranged on the surface of the boiler shell, and a flue gas exhaust pipe is arranged at a gas outlet. The industrial camera is arranged on the surface of the boiler shell; the fan is arranged on the upper surface of the boiler shell, an air outlet of the fan is connected with the cleaning ring through an air inducing pipe, the cleaning ring is installed on the inner wall of the boiler shell and located on the periphery of the lens, and air outlet pipes are evenly distributed on the inner wall. The flue gas analyzer is arranged at an air outlet of the flue gas exhaust pipe, and a high-temperature infrared temperature measuring unit and a pressure fluctuation sensor are further arranged in the boiler shell. The device has the advantages that airflow is conveyed to the cleaning ring through the draught fan via the air inducing pipe, a directional airflow field surrounding the lens is formed through the air outlet pipe on the inner wall of the cleaning ring, the surface of the lens is purged in real time, imaging blurring caused by dust accumulation is prevented, the cleaning ring and the lens are coaxially installed, it is ensured that the purge range is fully covered, and continuous work of an image collecting system is maintained.

The invention provides a coal-fired unit pulverized coal distribution adjustment control method based on a boiler wall temperature distribution field. According to the method, automatic adjustment of pulverized coal distribution of the coal-fired unit under the full-load working condition can be achieved, the uniformity of combustion intensity distribution is effectively improved, and the safety, the environmental protection property and the economical efficiency of unit operation are enhanced.

The invention relates to the technical field of power generation environmental protection control, and discloses a model prediction control and real-time optimization pollution reduction and carbon reduction control method and system. The method comprises the steps that unit load fluctuation data and combustion parameters are acquired, efficiency characteristic differences of all units are extracted, and coupling relation mapping between the units is constructed; based on the efficiency characteristic difference and the coupling relation mapping, adopting an optimization algorithm to generate a multi-unit cooperative adjustment scheme and determining a dynamic target value; control parameters are adjusted through simulation and prediction, a refining control parameter set is obtained, a control instruction is updated, and the combustion state is fed back in real time to correct the coupling relation; and analyzing the influence of load fluctuation on parameter regulation and control, generating and executing an intelligent strategy adjustment path, obtaining a power generation efficiency index, comparing the power generation efficiency index with a preset reference, and judging whether re-optimization is needed or not. According to the method, multi-unit collaborative combustion optimization, load adaptability adjustment and fuel utilization rate improvement can be achieved, coal consumption and emission are remarkably reduced, and the overall operation efficiency and environmental protection performance of a power plant are improved.

The present invention relates to the technical field of flue gas heat recovery. Particularly disclosed is a flue gas heat recycling structure for a combustion furnace, comprising: a flue dust filtering part, which comprises a flue dust pipe and a dust removal box connected to one end of the flue dust pipe, a filter screen mechanism used for filtering flue dust being mounted in the dust removal box; a flue gas high-temperature recycling part, comprising a water tank, a heat exchange assembly using the temperature of flue gas to heat a water source being mounted in the water tank; and an anti-acid dew part, mounted on the flue gas high-temperature recycling part and used for raising the temperature of flue gas and maintaining the temperature of outlet water. The flue dust filtering part of the present invention effectively cleans a filter screen in real time, so as to ensure the flue gas permeability of the filter screen, thus eliminating the need for manual cleaning and reducing maintenance costs. Meanwhile, cleaning actions are driven by the gas flow of flue gas, thus eliminating the need for extra energy consumption and achieving better practical effects. The anti-acid dew part uses part of high-temperature flue gas to raise the temperature of low-temperature flue gas, such that the discharge temperature thereof is higher than the condensation temperature of acid mist, thus avoiding generation of acid dew, and reducing damages to apparatuses caused by acid dew.

The utility model relates to a carbon dioxide enriched lime calcining system, which is a lime shaft kiln. A calcining chamber is arranged in the lime shaft kiln, the calcining chamber is sequentially divided into a plurality of combustion areas which are connected in series from top to bottom, and fuel injection combustion mechanisms are respectively and independently arranged in the combustion areas. According to the lime calcining system enriched with carbon dioxide, the calcining chamber is sequentially divided into a plurality of combustion areas connected in series from top to bottom, fuel and combustion-supporting gas are introduced into the calcining chamber in a segmented mode, the concentration of CO2 is controlled to be in a distribution mode that the concentration of CO2 is gradually increased from top to bottom, the inhibition effect of high-concentration CO2 on decomposition of CaCO3 is reduced, and the decomposition efficiency of CaCO3 is improved. The oxygen concentration of the middle-upper part of the calcining chamber is improved, and the burn-off rate and the utilization rate of fuel are improved.