60 results about "Boiler efficiency" patented technology

The invention discloses a machine learning multi-objective optimization control method based on coal quality characteristics and combustion state feedback, and belongs to the technical field of industrial process automatic control. According to the method, collaborative optimization control over the combustion efficiency, NOx emission and combustion stability is achieved under the multi-working-condition operation condition of the combustor. According to the method, coal quality characteristic parameters and combustion state data are collected, working condition clustering is carried out after data fusion, and a historical combustion operation data set coupling coal quality characteristics and combustion states is constructed; a combustion state evaluation model and a combustion control model are established by adopting machine learning, on the basis of identifying working conditions in real time and evaluating combustion performance, a control parameter adjustment amount is generated in combination with trend extrapolation and a multi-objective cost function, and a combustion state feedback rolling correction model and a control strategy are utilized to realize combustion control. The self-adaptive closed-loop collaborative optimization control of the combustion process under multiple coal types and multiple working conditions is realized, the boiler efficiency is improved, the NOx emission is reduced, and the operation robustness is enhanced.

The invention discloses a catalyst addition test correction method, system, equipment and medium, and belongs to the technical field of power system energy storage equipment, and the method comprises the steps: obtaining boiler operation parameters, and constructing a boiler efficiency model; a load-coal consumption correction curve is generated through the boiler efficiency model in combination with blank period test data and used for correcting load differences; based on the adding period test conditions, the blank period boiler efficiency is corrected, and corrected blank reference coal consumption is obtained; and the heat loss calculation is adjusted by correcting the air inlet temperature, the feed water temperature, the fuel characteristics and the air moisture deviation design value, and the boiler efficiency under the corrected condition is obtained. By correcting key parameters such as the air inlet temperature, the feed water temperature, the fuel characteristics and the air moisture, boiler efficiency fluctuation caused by operation condition differences is eliminated, and the comparability of test results in the blank period and the adding period is ensured.

The invention discloses a thermal power plant boiler combustion control method and system, and relates to the field of boiler combustion system control technical equipment. By collecting control loop data of a boiler combustion system in real time, dynamic characteristics, stability and response efficiency of a loop can be analyzed through a multi-dimensional performance evaluation model (including six indexes of steady-state tracking performance, static tracking performance, maximum control deviation, steady-state error, over-limit time and comprehensive tracking performance); based on the evaluation result, the air-coal ratio, the oxygen amount set value and the over-fire air door opening degree are dynamically adjusted through a combustion linkage algorithm, and intervention correction is conducted on set values of loops such as superheat degree control, primary air, secondary air and the coal amount of a coal mill when the performance of the control loop is deteriorated; combining a least square support vector machine to predict NOx concentration and boiler efficiency; and finally, combustion optimization is realized through closed-loop control. The problems that traditional PID control lags behind and loop coordination is poor are solved, boiler efficiency is improved, and pollutant emission is reduced.

The invention discloses an offshore platform fuel gas and supercritical carbon dioxide Rankine cycle combined power generation system, and relates to the technical field of offshore platform power generation systems. The problems that an existing thermal power generation technology in which a gas turbine and a steam turbine jointly operate is very low in power generation efficiency and high in carbon emission no matter in the low-temperature heat source field or the high-temperature heat source field are solved. Compressed air is mixed with fuel and combusted, high-temperature and high-pressure flue gas is generated, and a gas turbine is pushed to drive a gas turbine generator to generate power; high-temperature flue gas exhausted by the gas turbine enters the waste heat boiler, heat of the flue gas is used for heating a CO2 working medium in the waste heat boiler to generate high-temperature and high-pressure sCO2, an sCO2 turbine is pushed to drive a turbine generator to generate power, and gas and supercritical carbon dioxide Rankine cycle combined power generation is formed. The exhaust gas temperature of the boiler can be reduced by increasing the inlet smoke temperature of the waste heat boiler, so that the boiler efficiency can be improved after the flue type afterburning device is added, and the purposes of energy conservation and emission reduction are achieved. The invention is suitable for the technical field of offshore power generation.

This utility model discloses a biomass boiler ash removal device with anti-clogging function, comprising: a conveying pipe, one end of which is connected to the boiler, a first pipe extending upwards from the other end of the conveying pipe, and a second pipe extending downwards from the other end of the conveying pipe; and an ash removal structure disposed inside the conveying pipe, which scrapes away the accumulated soot inside the conveying pipe. This utility model can effectively and promptly remove soot, prevent clogging, ensure normal boiler operation, improve boiler efficiency, and reduce the frequency of downtime maintenance.

The invention relates to a thermal power plant boiler efficiency prediction method and system based on cloud computing. The method comprises the steps of collecting historical operation data of thermal power plant boiler operation efficiency; inputting the historical operation data after data preprocessing into a pre-constructed big data model, completing training of the pre-constructed big data model, and obtaining a pre-trained boiler efficiency prediction model; deploying the boiler efficiency prediction model in a cloud production environment; continuously acquiring real-time operation data of the boiler operation efficiency of the thermal power plant; the continuously-collected real-time operation data is subjected to data preprocessing and then input into a pre-trained boiler efficiency prediction model, and a boiler efficiency real-time prediction value is output through the pre-trained boiler efficiency prediction model. The invention discloses a thermal power plant boiler efficiency prediction method based on cloud computing. Based on an anti-balance method, reference efficiency is quickly calculated by using real-time sensor data (exhaust gas temperature, oxygen content and the like).

The utility model discloses a boiler energy efficiency test flue gas sampling device which comprises an assembly, a protection assembly, a wrapping assembly and a pipe body, the protection assembly is arranged at the top end of the assembly, the wrapping assembly is arranged at the tip end of the protection assembly, and the pipe body is arranged on the side of the wrapping assembly. The protection assembly comprises a connecting pipe, an inner cavity channel, a clamping block and a net plate. According to the boiler energy efficiency test flue gas sampling device, the length of the telescopic rod is adjusted through the height of the boiler through pipe and the height of the clamping ring, internal flue gas circulation is facilitated, a heat insulation material is arranged on the outer side of the clamping ring of the boiler through pipe, and heat insulation materials are arranged in the heat-resistant air bag and the heat-resistant cloth in the cover body; leakage is reduced through extrusion of the air bag, due to the fact that the connecting pipe is wrapped in the clamping ring of the boiler through pipe through the tip cover body, built-in smoke circulates through the connecting pipe, the net plate is arranged in the middle, dust in the boiler smoke can be blocked conveniently, and therefore the energy efficiency of the smoke can be efficiently detected.

The denitration and dust removal integrated biomass grate boiler comprises a second flue, a third flue and a fourth flue which are sequentially connected with an outlet of a hearth, the lower end of the second flue is communicated with the lower end of the third flue, and the upper end of the third flue is connected with the upper end of the fourth flue through a furnace top turning flue. A first platen superheater is arranged at the upper part of the hearth, a second platen superheater is arranged in the second flue, a coiled pipe superheater is arranged in the third flue, and denitration equipment, an economizer and a tail heating surface are sequentially arranged in the fourth flue according to the flowing direction of flue gas; dust removal equipment is arranged in the furnace top turning flue, and the dust removal equipment and denitration equipment are supported on a boiler body steel frame. The dust removal equipment and the denitration equipment are also arranged in the range of the boiler body, so that compared with the prior art, the lengths of the inlet flue and the outlet flue are greatly shortened, the heat dissipation loss is reduced, the boiler efficiency is improved, and the dust removal and denitration effects can be improved; and the floor area is small, and the construction cost is low.

The application discloses a kind of based on neural network and genetic algorithm's thermal power unit working condition dynamic optimization method, system, equipment and storage medium, it is related to thermal power unit intelligent dynamic optimization technical field, including determining fitness function parameter, constructs BP neural network model;Establish the boundary line equation of parameter to be optimized, the upper and lower boundary lines of parameter to be optimized under different loads are fitted out;Using genetic algorithm receives BP neural network model and boundary line equation, publishes working condition optimization AI model, configures non-optimized parameter;Boiler efficiency working condition optimization real-time model is constructed, and based on non-optimized parameter real-time optimization is carried out to parameter to be optimized, obtains efficiency deviation and corresponding parameter to be optimized deviation;The method described in the application realizes thermal power unit working condition dynamic optimization, parameter to be optimized reasonable boundary constraint and efficiency deviation and parameter deviation linkage output, improves the pertinence, coherence and executability of optimization result under complex load condition.

The application discloses a kind of furnace temperature prediction and control system based on deep learning, it is related to thermal power generation technology field.The system includes: data preprocessing module, for obtaining and processing DCS operation data, constructs historical time series data;Key parameter prediction module, using the deep learning time series prediction model of fusion quality balance, energy balance and NOx generation dynamics constraint, output the future change trend of multiple parameters;Multi-objective rolling optimization module, generate optimal control set value sequence;Instruction safety fusion module, after the safe fusion of optimization instruction and DCS original protection logic, issue and execute;And man-machine interaction and performance monitoring module.The application is through the integration framework of physical guided deep learning prediction and rolling time domain optimization, effectively solve the problem of large delay and strong coupling in thermal power unit combustion control, while improving load response speed, guarantee main steam parameter stability, improve boiler efficiency and reduce pollutant emission.

This invention discloses a multi-cold source system and method for a gas-fired steam boiler coupled with a two-stage heat pump. The flue gas from the gas-fired boiler releases heat through two stages of flue gas-water heat exchangers, then enters a parallel first-stage flue gas-air heat exchanger, a third-stage flue gas-water heat exchanger, and a flue gas-circulating water heat exchanger. The flue gas-circulating water heat exchanger provides a heat source for a low-temperature heat pump or a lithium bromide absorption heat pump, or an air-source heat pump can replace the flue gas-circulating water heat exchanger and the low-temperature heat pump. The heat from the flue gas in the parallel structure is distributed, and the released heat from the flue gas heats the air and feedwater. The flue gas then heats the feedwater through the low-temperature heat pump, air-source heat pump, or lithium bromide absorption heat pump. The heated feedwater then absorbs heat through a high-temperature heat pump and the first-stage flue gas-water heat exchanger before entering the gas-fired boiler along with the air. This invention fully absorbs the latent heat of water vapor in the flue gas of a gas-fired steam boiler, reducing the flue gas temperature to below 30°C, raising the feedwater temperature from 20°C to 120-140°C, raising the air temperature from 20°C to 50-90°C, and increasing the boiler efficiency to over 107%.

The invention relates to the field of waste incineration power generation, and discloses a secondary air switching air suction source system and method for a waste incineration power plant. The air inlet end of the first air suction channel is located at the top of the incinerator, and the air outlet end of the first air suction channel communicates with the air inlet side of a secondary fan; the air inlet end of the second air suction channel is located in the garbage pool, and the air outlet end communicates with the air inlet side of the secondary fan; the first control device and the second control device are arranged on the two air suction channels respectively to control on-off. And the control unit is electrically connected with the two control devices respectively, and is switched between two air suction states according to the change of operating parameters of the garbage incinerator and pressure parameters of the garbage pool: air suction is performed from the furnace top by opening one and closing two or air suction is performed from the garbage pool by opening two and closing one. The problem that due to the fact that an existing secondary air system is single in air suction source and fixed in path, garbage pool negative pressure stability and boiler efficiency cannot be considered at the same time during load fluctuation is solved.

The invention provides a carbon emission data detection method and a carbon emission data detection platform. The detection method comprises the following steps: acquiring carbon emission data of the generator set, wherein the carbon emission data comprises as received basis element carbon content, low calorific value, boiler efficiency, turbine efficiency, heat supply carbon emission intensity, heat supply coal consumption, power generation carbon emission intensity and power generation coal consumption; based on a preset calculation formula, calculating design values corresponding to heat supply carbon emission intensity, heat supply coal consumption, power generation carbon emission intensity and power generation coal consumption according to the obtained as received basis element carbon content, the obtained low heating value, the obtained boiler efficiency and the obtained steam turbine efficiency; comparing the corresponding design value with the obtained corresponding carbon emission data to obtain a corresponding comparison result; and according to the corresponding comparison result, judging the rationality of the obtained corresponding carbon emission data. The method can help a power enterprise to check the reasonability of the carbon emission data by themselves.

The utility model relates to a tail end wall temperature adjusting device of a biomass circulating fluidized bed boiler, which comprises a boiler tail flue, an air preheating system, a flue gas waste heat absorber and a pipeline system of the flue gas waste heat absorber. A coal economizer, a tubular air preheater and a flue gas waste heat absorber are sequentially arranged in the boiler tail flue along the flue gas flow direction; the air preheating system comprises a fan, an air pipe, a front preheater of an air preheater, a tubular air preheater and the like; the air pipe is connected with the fan, the front preheater of the air preheater and the tubular air preheater; a water outlet of the flue gas waste heat absorber is connected with a water inlet of a front preheater of an air preheater through a circulating pipeline, and a water outlet of the front preheater of the air preheater is connected with a water inlet of the flue gas waste heat absorber through a backflow pipeline to form a closed circulation loop. The smoke exhaust temperature and the heating surface pipe wall temperature are effectively controlled, low-temperature crystallization and ash deposition corrosion are prevented, and the boiler efficiency is improved.

The utility model discloses a kind of power station boiler dry slag machine furnace bottom air leakage management devices, specifically related to the field of energy saving and emission reduction of power station boiler, including dry slag machine body, its furnace bottom air leakage is led out through cooling air exhaust interface, furnace bottom air leakage exhaust interface, tail air leakage exhaust interface;Connection pipe;Air blower one, air blower two;Booster fan;Secondary air box outlet;Slag bin, slag discharge room;Transition slag hopper.The power station boiler dry slag machine furnace bottom air leakage management device described in the utility model, by the redesign of the way that traditional dry slag machine cooling air enters hearth, solve the dry slag machine cooling air that is completed heat exchange with furnace bottom slag, as furnace bottom air leakage directly enter hearth to the disturbance of combustion, change dry slag machine cooling air from disordered furnace bottom air leakage to orderly air by secondary air, can effectively improve the stability of hearth combustion, reduce flue gas temperature, reduce fly ash combustible carbon content, thereby improve boiler efficiency, reduce coal consumption.

The utility model relates to the technical field of boiler waste heat recovery, in particular to a high-temperature flue gas waste heat recovery system in front of a boiler tail flue desulfurizing tower, which comprises a desulfurizing tower, a gas inlet of the desulfurizing tower is connected with a slurry heat exchanger through a pipeline, and a spraying pipeline of the desulfurizing tower is connected with a heat pump evaporator; the heat pump evaporator is connected in series with the slurry heat exchanger through a pipeline; the slurry heat exchanger comprises an evaporator, an absorber, a condenser and a generator. High-temperature flue gas in front of the desulfurizing tower serves as a driving heat source to be used for heat recycling, on one hand, the exhaust gas temperature is reduced, the boiler efficiency is improved, on the other hand, the spraying water amount of the desulfurizing tower is reduced, and water resources are saved. The waste heat of the slurry is used for heating circulating water to serve as a low-temperature heat source, the waste heat of low-grade smoke which is difficult to use is utilized, and the energy grade of the waste heat is improved. Compared with other forms of gas-liquid heat exchangers, the slurry heat exchanger is used for heating low-temperature circulating water, so that the investment cost is low, and the system is easy to maintain.

The utility model provides a kind of coal pulverizer coal dust initial temperature promotion device, it is related to the technical field of coal-fired unit, including the flue between denitration device and air preheater and the flue gas inlet of coal pulverizer are communicated to the first pipeline leading out between them, high-temperature dust collector and temperature rising fan are sequentially provided on the first pipeline along the flow direction of flue gas;Flue between induced draft fan and chimney and the flue of first pipeline and second pipeline between high-temperature dust collector and temperature rising fan are converged;Valve group is arranged on the first pipeline and second pipeline;Valve group electric signal is connected with temperature control unit, for calculating the drying output demand temperature of coal pulverizer, solve the existing preprocessing easy to return moisture and technical problem of backflow abrasion equipment, reach the technical effect that internal flue gas of system is used to provide heat for coal pulverizer, while saving energy, reducing coal pulverizer explosiveness, improve low load condition boiler combustion state, improve boiler efficiency.

The invention provides a compound combustion device and method for fuel decoupling staged micro-fluidization grate-firing. The compound combustion device comprises a grate-firing furnace and a pyrolysis reactor. The fuel decoupling classification refers to that fine coal particles are converted into pyrolysis gas and high-temperature semi-coke through a cyclone pyrolysis reactor, the pyrolysis gas is introduced from the upper part of a main hearth to be used for reducing nitrogen oxide generated by combustion of a coal bed in a bed layer area, and the high-temperature semi-coke is conveyed to the upper surface of a bed layer through a pipeline to assist in igniting the coal bed; micro-fluidized bed combustion refers to that particle size distribution coal distribution is combined with primary air middle-front part air distribution, fine-particle coal in a bed layer is in a micro-fluidized combustion state in gaps of large-particle coal, combustion and burnout of a bed layer coal sample are enhanced, and the carbon content of bottom slag is reduced; the three-hearth structural design is adopted, fly ash return is coupled, fluidized fly ash and gas-phase components are intensified to be burnt out, and then the carbon content of the fly ash is reduced; through the layer combustion-chamber combustion combined combustion method, the incomplete combustion heat loss of the layer combustion furnace can be effectively reduced, the boiler efficiency is improved, and the original emission of nitrogen oxide is reduced.

Provided in the present disclosure are a boiler master control system, a pressure regulation method, an electronic device and a storage medium. The system comprises: a signal collection module, a derivative control module, a pressure deviation regulation loop, and a command dynamic compensation loop. Compared with the related art, in the embodiments of the present disclosure, a load change signal, a control valve actuation signal and a main steam pressure signal are used to compute a derivative action intensity, so as to precisely generate a first coal feed adjustment signal. This enables a timely response to load changes and pressure fluctuations, and thus ensures that coal feed adjustment is more precise, thereby avoiding boiler efficiency fluctuations or fuel waste caused by an excessive or insufficient coal feed; the pressure deviation regulation loop performs adjustment on the basis of the deviation of the main steam pressure signal, thereby further improving the stability of coal feed control; and the command dynamic compensation loop can effectively predict and adjust the coal feed on the basis of a dynamic change in a boiler load, a unit thermal energy storage parameter and a boiler capacity input rate, thereby adapting to dynamic changes in the boiler load and capacity.

The application discloses a power station boiler deep peak regulation performance integrated test system and method, which comprises a multi-working condition parameter acquisition and synchronization module, a flue gas composition and temperature precision checking module, an air preheater performance online test module, a boiler efficiency counterbalance calculation module, a combustion stability online monitoring module, a data correction and benchmarking processing module, a test report automatic generation and diagnosis module; the application realizes full-dimension linkage test of deep peak regulation performance, improves test integrity and systematicness, generates correction coefficients in real time aiming at oxygen content, flue gas temperature, and dial distortion of exhaust gas temperature, ensures that operation regulation and performance evaluation are based on accurate measured data, and avoids false regulation. Air preheater air leakage rate and boiler efficiency strictly follow ASME and national standards, are calculated online in real time, do not need manual processing, and shorten test period.

The invention relates to the technical field of biomass power generation, in particular to a device and a method for separating fly ash in a biomass furnace. The fly ash separation device comprises a plurality of flue gas separation assemblies which are sequentially arranged along a flue gas flowing path, each flue gas separation assembly comprises a vortex separator, each vortex separator is of an arc-shaped structure, the outer arc surface of each arc-shaped structure faces the flue gas flowing direction, and an opening of each arc-shaped structure is opposite to the flue gas flowing direction; a fly ash baffle plate is arranged at the top of the vortex separator, is positioned in the outline of the arc-shaped structure and shields partial area of the inner side of the arc-shaped structure. According to the device, fly ash particles carried by flue gas are separated in the boiler, and the separated fly ash particles are sent back to the hearth to be combusted again, so that the carbon content in fly ash is effectively reduced, and the purpose of improving the boiler efficiency is achieved.

The invention discloses a high-temperature corrosion risk hierarchical control method and system based on flue gas CO distribution characteristics. The system comprises a distributed CO detection array, an embedded processor and an execution module. The distributed CO detection array collects the CO concentration of a hearth outlet in real time; the embedded processor runs a distribution function correction algorithm; the execution module adjusts the operation oxygen amount or the opening degree of a wall-attached air door and a secondary air door according to the risk level. At present, most units cannot realize online detection of the CO concentration in the adherent atmosphere, the system monitors the high-temperature corrosion risk level of the water cooling wall through the CO concentration of a hearth outlet, a differential control strategy is provided, the high-temperature corrosion problem of the water cooling wall of the boiler is effectively relieved, and the efficiency of the boiler is improved.

The objective is to provide a boiler that can efficiently recover heat from exhaust gas without reducing boiler efficiency, even when the heat transfer area is small. [Solution] A boiler comprising a group of water tubes arranged in a ring around a combustion space, allowing combustion gas to flow out of the ring through the gaps between adjacent water tubes; a guide section that guides the combustion gas flowing out of the ring along the water tubes; and an outer wall that surrounds the guide section, collecting the combustion gas flowing out of the guide section and guiding it to a discharge duct. At least one water tube is provided with a vertical fin extending from its side so as to create a gap of a predetermined interval on the outer side of the ring of the water tube adjacent to that water tube, and the guide section guides the combustion gas flowing out from the predetermined gap between the water tube and the vertical fin along the water tube.

The invention discloses a thermal power plant boiler thermal efficiency dynamic test method, and relates to the technical field of thermal power plant boiler state monitoring. The method comprises the following steps: in a target boiler system to be measured, setting input and output energy boundaries required by thermal efficiency calculation, and arranging a monitoring unit in a target boiler area; setting a continuous operation condition sequence including load increasing, load decreasing and set range fluctuation, and generating a composite load curve; executing a data recording mechanism; according to the technical key points, efficiency under different loads is converted to standard working conditions by introducing a quadratic polynomial normalization function based on load percentage, transverse comparison of cross-load working conditions is achieved, in addition, an efficient area, a low-efficiency area and a transition area are recognized by revealing the internal rule that boiler efficiency changes along with loads, and the efficiency of the boiler is improved. The problems that a traditional test result is isolated and optimization operation cannot be guided are solved, and linkage of energy efficiency diagnosis and operation optimization is achieved.

The invention relates to the technical field of industrial automation and intelligent manufacturing, and discloses a combustion optimization control system based on multi-target optimization, which comprises a data collection unit, a sensor fault diagnosis unit, a data preprocessing unit, a multi-target optimization unit, a multi-target online regulation and control unit, a control instruction generation unit and an online learning and self-adaption unit, the data collection unit is responsible for collecting combustion system and extreme working condition parameters, the sensor fault diagnosis unit is responsible for diagnosing sensor null drift and failure faults, the data preprocessing unit outputs high-quality multi-source data, and the multi-target optimization unit calculates a sensor i compensation value, boiler efficiency, a NOx emission value and a combustion stability index based on the high-quality multi-source data. The multi-target online regulation and control unit outputs a Pareto optimal solution set based on a calculation result, the control instruction generation unit generates a specific control instruction which can be directly issued to the DCS, and the online learning and self-adaption unit updates model parameters and decision rules online.

This invention discloses a method for the resource utilization and coal blending combustion of steel rolling sludge. The method involves mixing bituminous coal A with steel rolling sludge to prepare a mixture; feeding the mixture into a hot air dryer to prepare a mixed fuel; calculating the contribution of the steel rolling sludge to the volatile matter, ash content, and carbon content of the mixed fuel according to simplified rules; blending the mixed fuel, bituminous coal B, and bituminous coal C according to a coal blending model to prepare a blended coal; determining the R90 fineness of the blended coal obtained by pulverizing it in a coal mill based on the volatile matter content; using the obtained blended coal as fuel in a pulverized coal boiler for power generation; and determining the technical parameters of the pulverized coal boiler based on the volatile matter content. This invention couples steel rolling sludge with a coal-fired boiler, utilizing the synergistic utilization of oil and iron oxides in the steel rolling sludge. The oil rapidly releases combustible gases in the early stages of combustion, shortening the ignition delay time and improving combustion efficiency. The iron oxides act as a catalyst, promoting the oxidation of carbon particles. This achieves the harmless disposal and energy utilization of industrial solid waste without reducing boiler efficiency.

The invention discloses a thermal power generating unit output quantitative analysis method based on an auxiliary machine operation state, and belongs to the field of coal power unit performance state monitoring and diagnosis, and the method comprises the following steps: calculating the coal grinding output variation based on the air volume change of a primary fan; calculating a main steam flow variable quantity based on the coal grinding output variable quantity and the boiler efficiency variable quantity; calculating the power generation power variation of the unit based on the main steam flow variation and the steam ratio internal work variation of the steam turbine; wherein the boiler efficiency variable quantity is calculated through the exhaust gas temperature variable quantity caused by the change of the air volume of a primary air fan, and the steam ratio internal work variable quantity of the steam turbine is calculated through steam parameters of the steam turbine after the air volume of the primary air fan is changed.

The invention belongs to the technical field of biomass power plant energy conservation, and provides a device and method for reducing the carbon content of biomass boiler fly ash, and the device comprises an inclined guide plate mounted at the lower part of a boiler body in the middle of two return strokes of a boiler, and an arc-shaped guide plate arranged at the lower part of the inclined guide plate; a rear boiler wall inclined ash baffle and a rear boiler wall transverse ash baffle are arranged on the rear boiler wall of the boiler second return stroke of the boiler body, an ash falling hopper is arranged at the bottom end of the boiler body, and a conveying fan is arranged on the ash falling hopper through a fly ash pneumatic conveying main pipe. Fly ash flowing along with flue gas is separated from the flue gas by means of inertia force and gravity and falls into an ash falling hopper under the flow guide effect of the inclined flow guide plate and the arc-shaped flow guide plate and the blocking effect of the rear furnace wall inclined ash blocking plate and the rear furnace wall transverse ash blocking plate, and then the collected fly ash is sent back into a hearth through a conveying fan to be combusted again. Therefore, the carbon content in the fly ash is reduced, and the purpose of improving the boiler efficiency is achieved.

The invention relates to the technical field of air pre-heater flushing, in particular to an air pre-heater preheating element flushing device which comprises a flushing mechanism, the flushing mechanism comprises a switching assembly, the switching assembly is communicated with a spray head assembly, and the switching assembly can switch and input different flushing media into the spray head assembly; through the arrangement of the switching assembly, the same nozzle can spray different flushing media alternately, the installation space is saved, flushing errors are avoided, and through the nozzle assembly, the device is clear in coverage range and free of missing. Meanwhile, the device is simple in structure, can remove clogging on line, effectively prevents condensation of ammonium bisulfate, reduces wind resistance, reduces output of an induced draft fan, improves heat exchange efficiency of an air pre-heater and boiler efficiency, and reduces power generation coal consumption.

This invention discloses a flue gas source heat pump and a steam corner tube boiler for recovering waste heat from flue gas, belonging to the technical field of corner tube boilers. The steam corner tube boiler includes a furnace, a flue gas cooler, a flue gas source heat pump, a flue gas condensing heat exchanger, a condensing air preheater, a secondary air preheater, and a chimney. A finned heat exchange tube bundle is arranged in the direction of the flue gas outlet in the furnace. The flue gas outlet of the furnace is connected to the flue gas cooler. The outlet of the flue gas cooler is connected in parallel to the flue gas source heat pump, the flue gas condensing heat exchanger, and the condensing air preheater, which are arranged sequentially from top to bottom. The boiler feedwater is directly connected to the flue gas source heat pump through an external water pipe, using refrigerant as a medium to improve the utilization efficiency of the latent heat of water vapor in the flue gas. The flue gas source heat pump, the flue gas condensing heat exchanger, and the condensing air preheater are arranged in parallel from top to bottom after the flue gas cooler to divert the flue gas, and together with the secondary air preheater, improve the efficiency of the steam boiler.