1319 results about "Air preheater" patented technology

The present invention discloses a hot-end sealing device for an air preheater that compensates for the expansion difference between a sealing sheet and a backing plate, which at least includes a sealing sheet and a backing plate. The sealing sheet is provided with sealing sheet mounting holes distributed along the length direction, and the backing plate is provided with backing plate mounting holes distributed along the length direction. The linear expansion coefficient of the sealing sheet is different from that of the backing plate. The sealing sheet and the backing plate are relatively fixed by clamping bolts that simultaneously pass through the sealing sheet mounting holes and the backing plate mounting holes. One end close to the rotor central cylinder is the expansion starting end, and the clamping bolts at the expansion starting end are fully tightened and fixed, while the remaining clamping bolts are not fully tightened and fixed, so that the sealing sheet and the backing plate freely expand towards the other end close to the rotor outer edge angle steel after being heated. At least one set of two-dimensional guiding mechanisms is arranged between the sealing sheet and the backing plate downstream of the expansion starting end. The above device maximally compensates for the triangular air leakage area at the hot end of the air preheater, significantly reduces the air leakage rate of the air preheater, has good stability and a long service life.

The invention relates to the technical field of denitration and ammonia spraying, in particular to an intelligent denitration and ammonia spraying automatic control system and method for a thermal power coal-fired unit, and the system comprises a control module which is used for controlling and monitoring the whole denitration process; the data analysis and prediction module is used for analyzing by utilizing historical data and real-time data, predicting NOx concentration change and providing decision support for ammonia injection control; the balancing module is responsible for accurately controlling and optimizing the ammonia spraying amount; the monitoring and feedback module is used for monitoring the concentration of NOx and ammonia escape in real time and providing a feedback signal for the control system; and the communication module is responsible for data transmission between the denitration control system module and the DCS program. The method has the beneficial effects that the time stability and the space uniformity of NOx at an SCR outlet are improved through an intelligent feed-forward algorithm and an override algorithm, excessive ammonia spraying is reduced by utilizing an ammonia escape correction system, the ammonia escape rate is effectively reduced, the operation reliability of a unit is improved, and the resistance increase of a flue gas system caused by blockage of an air pre-heater is reduced.

The invention provides an air pre-heater ash clogging monitoring system and method, and relates to the technical field of air pre-heaters, and the system comprises a real-time monitoring module which is used for obtaining real-time working parameters of an air pre-heater, and judging whether the ash clogging condition exists or not at present; and the ash clogging prediction module is used for performing ash clogging prediction according to the historical working parameters of the air preheater. The permissible fluctuation range of the flue gas pressure difference is updated regularly according to the real-time working parameters of the air preheater, flue gas emission can be more accurately controlled, accidental shutdown of the air preheater caused by improper parameter setting can be reduced, and therefore the stability and safety of operation of the whole device are improved, and the service life of the whole device is prolonged. When the flue gas pressure difference is changed abnormally, ash blocking prediction is carried out, prevention measures are taken before actual occurrence of ash blocking, actual occurrence of ash blocking is avoided, and stable operation of the air preheater is guaranteed.

The invention discloses an efficient pulsating heat pipe air pre-heater gas stove, and relates to the technical field of gas stoves. The air pre-heater comprises an air pre-heater body, a pulsating heat pipe and an air supply pipeline, the pulsating heat pipe is embedded in an inner cavity of the air pre-heater body, and the bottom of the air pre-heater body communicates with the top of the air supply pipeline; the air pre-heater body comprises a heat insulation radiation cavity and an air pre-heating cavity. The heat transfer efficiency of the pulsating heat pipe is far higher than that of traditional metal heat conduction, heat of high-temperature flue gas can be rapidly absorbed, waste heat loss is reduced, the heat efficiency is improved, secondary air is heated through the air preheater, the temperature of the secondary air is increased, the combustion temperature is increased, gas combustion is more sufficient, emission of carbon monoxide and nitric oxide is reduced, and the energy-saving and environment-friendly effects are achieved. The pulsating heat pipe has the unique advantages of being small and exquisite in structure, flexible in arrangement and efficient in heat transfer, and the heat efficiency of the gas stove is effectively improved through the L-shaped pulsating heat pipe heat insulation air pre-heater structure.

The invention provides a CFB (circulating fluid bed) boiler for heating molten salt by sucking smoke in a tail flue, and belongs to the technical field of CFB boilers coupled with molten salt heat storage. The problem that the scale and efficiency improvement of industrial production are seriously limited due to the fact that a traditional CFB boiler unit is generally lack of high-capacity and high-parameter industrial gas supply capacity is solved. The system comprises a hearth, a separating and returning system and a tail flue, the separating and returning system comprises a cyclone separator, and a low-temperature superheater high-temperature section, a low-temperature superheater low-temperature section, a high-temperature economizer, an SCR device, a low-temperature economizer and an air preheater are sequentially arranged in the tail flue in the flowing direction. A high-temperature flue gas leading-out pipeline is arranged between the low-temperature superheater high-temperature section and the low-temperature superheater low-temperature section, a low-temperature flue gas leading-out pipeline is arranged between the high-temperature economizer and the SCR device, and the outlet end of the high-temperature flue gas leading-out pipeline and the outlet end of the low-temperature flue gas leading-out pipeline are both connected with the inlet end of the mixer. The device is mainly used for the CFB boiler unit.

The invention discloses a shielding space operation communication gateway system based on PLC and 5G multimode fusion, and relates to the technical field of communication gateways, through integrating a task intention recognition module, a link semantic modeling module, an intelligent strategy regulation and control unit, a cross-link redundancy coding and decoding module, a link abnormal game detection module and a cognitive evolution management module; modeling is carried out through task-driven communication service requirements, semantic abstraction is carried out on a link state in combination with a graph neural network, a system constructs a double-input reinforcement learning model, and joint scheduling of link selection, coding configuration and energy consumption control is realized; meanwhile, the abnormal behavior of the link is judged through an adversarial sample recognition and game mechanism, and a main strategy structure is optimized based on a multi-strategy scoring and inheritance mechanism; the system has the capabilities of intelligent decision making of communication strategies, anomaly defense and self-evolution optimization, and is particularly suitable for high-reliability operation communication requirements in a limited space in wireless communication shielding environments such as a hearth, an air pre-heater, an absorption tower, a tunnel, a mine and a subway.

The invention discloses an air pre-heater cold end multi-fault diagnosis method and device based on a panorama and a dynamic intelligent model, and relates to the technical field of thermal power plant auxiliary engine fault diagnosis, and the method comprises the steps: constructing a panorama monitoring image of an air pre-heater rotor, and dividing the panorama monitoring image into a plurality of independent monitoring regions; extracting color channel information of each monitoring area, and dynamically updating a threshold range of each color channel based on a multi-trigger condition; obtaining morphological edge contour features and color channel deviation features, and jointly inputting the morphological edge contour features and the color channel deviation features into a pre-trained multi-fault classification model; the fault type recognition result, the confidence coefficient and the preset fault type weight are fused, the comprehensive degradation index of each monitoring area is calculated, a three-dimensional diagnosis result is output in combination with the spatial position information of the monitoring areas, and accurate positioning diagnosis, degradation trend quantification and multi-fault intelligent distinguishing of the cold end area of the air preheater are achieved. The method is suitable for full-life-cycle online monitoring and maintenance decision making of the rotary air pre-heater.

The invention discloses an intelligent control method and system for preventing blockage of an air preheater, and the method comprises the steps: determining the flue gas flow difference data of the front and rear sides of the air preheater, evaluating the blockage condition of the air preheater to obtain a blockage evaluation value, and setting the initial working condition of a blowing device according to the blockage evaluation value; acquiring flue gas temperature data and flue gas flow data of the front side of the air preheater, and determining a flue gas temperature coefficient and a flue gas flow coefficient through analysis; and a regulation and control coefficient is determined based on the flue gas temperature coefficient and the flue gas flow coefficient, and after the initial working condition of the air blowing device is adjusted, the air blowing device is controlled to conduct anti-blocking air blowing on the air preheater. By monitoring the flue gas flow difference data in real time, analyzing the flue gas temperature and flow data and combining an intelligent algorithm and a control strategy, intelligent anti-blocking control over the air preheater can be achieved in time, stable operation of equipment is ensured, the service life of the equipment is prolonged, the maintenance cost is reduced, and the production efficiency is improved.

The invention relates to the technical field of waste heat recovery, and particularly discloses an efficient waste heat recovery system based on secondary lead smelting and a cascade using method thereof.The efficient waste heat recovery system comprises a smelting furnace, an air preheater, a cyclone dust collector, a box type dust collector, a waste heat boiler and a raw material drying machine which are sequentially connected; a vertical cylinder with the lower end extending out is concentrically fixed to the top of the heat preservation outer shell, a heat exchange rotor is rotationally arranged at the upper end of the vertical cylinder, the interior of the heat exchange rotor is evenly divided into a plurality of sealed fan-shaped spaces, the fan-shaped spaces are filled with phase change heat storage materials, and a plurality of sets of vertical tubes are arranged in each fan-shaped space. A plurality of groups of radial through heat exchange tubes are arranged in each fan-shaped space; according to the waste heat efficient recovery system and the waste heat cascade using method, on the premise that high-temperature flue gas waste heat is efficiently utilized, corrosion of high-temperature strong acid gas to the heat exchange pipes and the heat exchange media can be avoided, and the service life of the air preheater is guaranteed.

The utility model discloses a boiler air pre-heater with a cleaning function, which comprises an air pre-heater body, the air pre-heater body comprises a tube box, a smoke tube bundle and a scraper device are arranged in a heat exchange cavity of the tube box, and the scraper device is used for scraping dirt on the outer side wall of each smoke tube in the smoke tube bundle; a smoke inlet pipe and a smoke exhaust pipe are arranged at the two ends of the pipe box respectively, the axis of a smoke inlet of the smoke inlet pipe and the axis of a smoke outlet are arranged in an angle mode, an extending pipe extending in the axial direction is arranged on the side, opposite to the smoke outlet, of the smoke inlet pipe and communicated with the smoke inlet pipe, and a scraping and washing device is arranged in the extending pipe. The scraping and washing device is used for scraping dirt on the inner side wall of each smoke tube in the smoke tube bundle; a valve control assembly is arranged at the joint of the extension pipe and the smoke inlet pipe. According to the smoke tube bundle cleaning device, dirt accumulated on the inner side wall and the outer side wall of each smoke tube in the smoke tube bundle is scraped away in a scraping and washing mode under the condition that disassembly is not needed, and therefore cleaning of the smoke tube bundle is achieved, heat exchange efficiency is improved, cost is reduced, and the service life is greatly prolonged.

The utility model discloses a heat exchange plate, belongs to the field of air preheaters, solves the problem that better heat exchange efficiency cannot be obtained when a plate sheet with higher hardness is used in the prior art, and mainly adopts the technical scheme that the heat exchange plate is formed by welding two thin plates which are arranged front and back through a plurality of linear welding parts, the non-welded parts on the two thin plates are far away from each other to form an air cavity for flowing air, the left side of the air cavity is an air inlet side, the right side of the air cavity is an air outlet side, and the linear welding part is in an up-and-down fluctuating wave shape. The heat exchange plate is mainly used for improving the heat exchange efficiency while ensuring the strength of the heat exchange plate.

The invention belongs to the field of heat-engine plant boiler flue gas waste heat recycling, and discloses a boiler waste heat recycling system which comprises an air preheater and a boiler, and a flue gas outlet of the boiler is communicated with a flue gas channel inlet of the air preheater through a pipeline; an outlet of an air channel of the air preheater communicates with a combustion-supporting air inlet of the boiler through a pipeline, and an inlet of the air channel is used for introducing air to be heated. The air preheater further comprises a preheating unit, the preheating unit comprises a compartment, and the compartment is arranged on the air side of the air preheater and located between the smoke channel and the air channel. The air inlet end and the air outlet end of the compartment are communicated through a circulating pipeline; the circulating fan is arranged on the circulating pipeline and is used for driving the gas in the compartment to circulate; according to the scheme, by means of the buffer area formed by the compartments and the circulating fan, the temperature shock amplitude of the heat accumulator in the alternate heat absorption and heat release process is reduced, and deformation of the heat accumulator caused by too large local thermal stress is relieved; the problem that the heat accumulator is heated unevenly is solved.

The utility model provides a sealing structure of a rotary air preheater, and belongs to the technical field of air preheaters. The rotary air preheater sealing structure comprises an air preheater body and a lifting structure, the air preheater body comprises a shell, a main shaft, a connecting plate, an upper sector plate, a lower sector plate, a rotor and a sealing piece, the main shaft is connected with the shell, the connecting plate is connected with the main shaft, the upper sector plate is hinged to the connecting plate, the lower sector plate is hinged to the rotor, and the lifting structure is connected with the shell. The lower sector plate is connected with the main shaft, and the rotor is connected with the main shaft. According to the sealing structure of the rotary air preheater, the height of the upper sector plate can be conveniently adjusted, the problem that the area of a triangular air leakage area is increased after the sealing piece is continuously abraded is solved, the area of the triangular air leakage area is kept in a stable interval, then it is guaranteed that the air leakage amount is kept in a stable area, and the energy consumption utilization efficiency is improved.

The invention discloses an optimal design method of a high-temperature air pre-heater for a solid oxide fuel cell based on a three-period minimum curved surface, which comprises the following steps of: firstly, establishing a sample database between a three-period minimum curved surface single crystal cell structure and hydraulic characteristic parameters and between an end socket structure and a local resistance coefficient; based on a sample database, an artificial neural network model of a single cell structure and hydraulic characteristics, and an end socket and local resistance is constructed, according to the model, on the basis of design requirements, a non-linear optimization algorithm is combined to design a cross-flow heat exchanger cell-by-cell self-adaptive heat balance calculation process, and pressure drop on the cold side and the hot side is used as an optimization target to optimize the cross-flow heat exchanger cell-by-cell self-adaptive heat balance calculation process. According to the method, the minimum curved surface structure air preheater optimization design method based on the multi-objective genetic optimization algorithm is developed, the geometric structure of the single crystal cell, the overall size of the air preheater and the corresponding thermal performance are finally obtained, the optimal matching scheme between the single crystal cell and the overall size can be automatically obtained, the design optimization efficiency is improved, and the design cost is reduced. And engineering application is facilitated.

The invention relates to the technical field of steam generators, and provides a steam generator with an air preheater, comprising: a steam generator having an evaporation channel and a heating channel; the combustor is arranged on the steam generator, is provided with a preheated air inlet, is communicated with the heating channel and is used for heating the heating channel; the transition smoke box is communicated with the heating channel; the air preheater is provided with a preheating channel and an air flow channel, the preheating channel communicates with the transition smoke box, and the preheating channel is used for preheating air in the air flow channel after smoke is introduced into the preheating channel; and the air flow channel is communicated with the preheated air inlet. By means of the technical scheme, the problem that in the prior art, when the water inlet temperature of a steam generator is high or high-temperature circulating water is used, low-temperature flue gas emission cannot be achieved is solved.

The invention discloses an air preheater anti-blocking method for reducing NH3 escape and SO3 content, and relates to the field of air preheater anti-blocking. Comprising the steps of step-by-step soot blowing optimization, dynamic soot blowing parameter adjustment, ammonia escape precise control, coal type bin-divided blending, combustion parameter optimization control and wall temperature increase treatment. According to the invention, step-by-step soot blowing strengthens removal of ash on the surface of the catalyst and reduces the ammonia escape concentration through fixed-point retention and dynamic adjustment; the ammonia escape detection system monitors and adjusts the ammonia spraying amount in real time to ensure that the ammonia escape concentration is lower than 3 ppm, and generation of NH4HSO4 is reduced; the SO3 generation amount is reduced through coal type bin-dividing blending and combustion parameter optimization control, and the blocking risk is restrained from the source; in the wall temperature increasing treatment, the wall temperature is increased to 210 DEG C or above in a circulating air bin heating and single-side temperature increasing mode, and coagulated materials are promoted to be gasified and fall off. According to the method, the problem of blockage of the air preheater is effectively solved, and the operation efficiency and stability of a boiler system are improved.

The utility model discloses an ammonia gas heating system capable of improving boiler efficiency. The ammonia gas heating system comprises a combustion boiler, an ammonia gas burner arranged in the combustion boiler, an air preheater communicated with a smoke outlet of the combustion boiler, and a dust remover, a desulfurizing absorption tower and a chimney which are sequentially communicated with the air preheater in the smoke flowing direction. The system further comprises at least one group of flue gas coolers, a closed circulating heat medium water system and an ammonia gas supply system; the multiple smoke coolers are arranged on the upstream of the chimney in a communicating mode and used for supplying heat to the heating medium water system. Ammonia gas supplied by the ammonia gas supply system is heated by the heating medium water system and then enters the ammonia gas combustor to be combusted. Considering that ammonia gas is dangerous, in order to avoid leakage of the ammonia gas, the heating medium water circulation system is arranged to serve as an energy transfer medium, the problems of pipeline corrosion and abrasion possibly caused by direct contact between an ammonia gas pipeline and flue gas are avoided, and therefore the problem of leakage of the ammonia gas is avoided. And the safety and reliability of the whole system are improved.

The invention relates to the technical field of anti-blocking of air preheaters, in particular to an anti-blocking device for a boiler air preheater, which comprises an air preheater and an air outlet hopper fixedly connected to the circumference of the bottom of the air preheater, and an air inlet hopper is fixedly connected to the top of the air preheater along the circumference. Preheating pipes are evenly and fixedly connected between the top and the bottom of the air preheater in a penetrating mode at intervals, a transverse plate is fixedly connected to the inner side of the air preheater, and the preheating pipes fixedly penetrate through the transverse plate. When flue gas is discharged into the preheating pipe, an electric heating wire is started, then an electric lead screw is started to rotate forwards and backwards alternately to drive an n-shaped plate to move up and down, the n-shaped plate drives a scraping plate to move up and down, and the scraping plate drives the electric heating wire to move up and down to heat the lower portion of the preheating pipe, so that the temperature of the preheating pipe is higher than the dew point of water vapor and acid gas in the flue gas; and meanwhile, dust attached to the outer wall of the preheating pipe is scraped away through a scraping plate, blockage caused by dust attached to the inner wall of the preheating pipe can be prevented through the heating effect of a spiral scraping plate and an electric heating wire, and therefore the smoke flowing efficiency is improved.

The invention discloses a temperature control method and system for an air preheater, and relates to the technical field of temperature control, temperature data of different parts in the air preheater are collected in real time to form a data set, after data normalization processing is carried out, a temperature data analysis model is established through a deep learning neural network, and the temperature data analysis model is analyzed; the model is used for analyzing and processing data to obtain temperature early warning and adjusting information, self-adaptive PID control is adopted to adjust the temperature in real time according to an analysis result, and an alarm signal is sent to a mobile phone APP according to the early warning information to remind an operator. The system can quickly and accurately respond to temperature change, improve control precision, avoid damage to equipment parts, shortening of the service life of equipment and increase of maintenance cost due to too high temperature, and can also prevent reduction of energy utilization efficiency due to too low temperature, thereby improving stability and economical efficiency of the whole production system.

The invention relates to the technical field of air preheaters, and discloses an efficient compact type air preheater and a control method thereof.The efficient compact type air preheater comprises a preheater body, a plurality of heat exchange pipes are arranged in the preheater body, multiple sets of heat exchange pipes are distributed in the transverse direction, and each set of heat exchange pipes are connected through bent pipes to form a continuous water passing pipeline; the water inlet ends of the multiple sets of water passing pipelines communicate with a water inlet header pipe, the water outlet ends of the multiple sets of water passing pipelines communicate with a water outlet header pipe, a medium input pipeline and a medium output pipeline are arranged on one side of the preheater body, an air outlet is formed in the top of the preheater body, an air inlet is formed in the bottom of the preheater body, and an air circulation device covering the air outlet and the air inlet is arranged on the preheater body. The air circulation device comprises a flow expanding body and a flow gathering cover, the top air outlet end of the flow gathering cover is communicated with the air inlet position of a burner of the heating furnace, and a flow meter, a thermometer and a flow control valve are arranged on the medium input pipeline and the medium output pipeline. The waste heat utilization device has the effect of efficiently utilizing waste heat energy.

The utility model discloses a flue gas guiding device of a high-temperature bypass flue, which comprises a denitration system, an air preheater arranged below an outlet of the denitration system, and a dust remover system communicated with an outlet end of the air preheater, and further comprises a main flue unit, the bypass flue unit comprises a first flue gas guide pipe communicated with the drainage pipe, and a rotational flow cylinder which is arranged at an outlet of the first flue gas guide pipe and is used for preliminarily separating dust in the flue gas guided out by the first flue gas guide pipe from the flue gas; and the second flue gas guide pipe is arranged at the outlet of the rotational flow cylinder and is used for discharging the flue gas subjected to rotational flow in the rotational flow cylinder. The separated fine liquid drops and soot particles impact the inner wall of the cyclone cylinder and finally slide into the dust accumulation groove along the inner wall of the cyclone cylinder, so that the risk that the fine liquid drops mixed with the soot particles are accumulated in the second flue gas flow guide pipe, and the bypass flue is blocked by dust is effectively avoided.

The utility model discloses an air preheater for a burner at the bottom of an ethylene cracking furnace, and relates to the field of ethylene cracking, the air preheater comprises an air preheater body and a connecting air duct, the air preheater body comprises a preheater shell, an air inlet and an air outlet are formed in the two ends of the preheater shell respectively, and a heat exchange tube bundle is arranged in the preheater shell; a heat source inlet and a heat source outlet are formed in the preheater shell and connected to the two ends of the heat exchange tube bundle correspondingly. The air outlet is connected to a combustor at the bottom of the cracking furnace through a connecting air duct; one air preheater body is matched with a plurality of cracking furnace bottom combustors. The cracking furnace solves the problem that the bottom space of the cracking furnace is limited, is suitable for limited space, saves occupied area and is high in heat exchange efficiency.

The invention relates to a reversible solid oxide fuel cell-electrolytic cell (rSOC for short) system and an operation method of the reversible solid oxide fuel cell-electrolytic cell (rSOC for short) system, and particularly relates to a reversible solid oxide fuel cell-electrolytic cell (rSOC for short) system and an operation method of the reversible solid oxide fuel cell-electrolytic cell (rSOC for short) system. The system mainly comprises an rSOC stack module, a fuel preheater, a reformer, a desulfurizer, a heat exchange type steam generator, a deionized water pump, an air preheater, a fan, a combustor, a circulating fan, a stop valve, a heat tracing band, a power supply, a control system, a pipeline, a heat insulation material, a sensor and the like. According to the system, an rSOC stack module fuel tail gas circulation process is adopted, free switching of the system between an SOFC mode and an SOEC mode is achieved by adjusting switches of stop valves at different positions on a pipeline, all parts in the system are fully utilized, the process framework of the rSOC system is simplified to the maximum extent, gradient utilization of energy is achieved in the SOFC mode and the SOEC mode, and the system is suitable for large-scale popularization and application. The system energy consumption is reduced; the system is simple in structure, stable, reliable, low in energy consumption and high in operability.

The invention discloses an energy-saving boiler, and relates to the technical field of boilers, the energy-saving boiler comprises a boiler body and a smoke exhaust pipeline mounted on the boiler body, the energy-saving boiler further comprises an air preheater mounted at the tail end of the smoke exhaust pipeline, and a pair of heat exchange pipe sets distributed in the smoke exhaust direction is mounted in the air preheater; the heat exchange tube set is composed of a plurality of heat exchange tube bundles, expanding parts and reducing parts which are alternately distributed along the axes of the heat exchange tube bundles are arranged on the heat exchange tube bundles, spiral flow deflectors and movable cleaning frames with upper and lower openings are arranged on the inner walls of the reducing parts, and the movable cleaning frames are movably installed in the heat exchange tube set and provided with through holes allowing the heat exchange tube bundles to penetrate through. Annular cleaning turbulent flow pieces corresponding to the heat exchange tube bundles are rotationally installed in the movable cleaning frame. By arranging the movable cleaning frame and a plurality of annular cleaning turbulent flow pieces in the movable cleaning frame, the outer wall of the heat exchange tube bundle can be continuously scraped in the moving process, and compared with a traditional soot blowing mode, the mechanical scraping mode is more thorough in soot cleaning.

The invention relates to the technical field of waste incineration flue gas treatment, and discloses a waste incineration flue gas purification and waste heat gradient utilization system. The waste incineration flue gas purification and waste heat gradient utilization system comprises a waste heat boiler, a circulating type dry deacidification reaction tower, a bag-type dust collector and a flue gas waste heat recovery heat exchanger which are arranged in sequence. The circulating dry deacidification reaction tower is sequentially provided with a bottom flue gas inlet, a middle feeding section and a top flue gas outlet from bottom to top; a flue gas outlet of the waste heat boiler is connected with a bottom flue gas inlet of the circulating dry deacidification reaction tower; a top flue gas outlet of the circulating dry deacidification reaction tower is connected with a flue gas inlet of the bag-type dust collector; a flue gas outlet of the bag-type dust collector is connected with a flue gas inlet of the flue gas waste heat recovery heat exchanger; and a shell-and-tube flue gas-air preheater is arranged at the tail end of the waste heat boiler. According to the system, flue gas purification and gradient utilization of waste heat can be achieved, and remarkable economic and environmental benefits are brought.

The utility model relates to a horizontal tubular air preheater with turbolators, which is characterized in that a first-stage air preheater and a second-stage air preheater are arranged in a frame, a plurality of turbolator heat exchange tubes are respectively arranged in the first-stage air preheater and the second-stage air preheater, flue gas sequentially and transversely scours the second-stage air preheater and the first-stage air preheater, and the turbolator heat exchange tubes are arranged in the first-stage air preheater and the second-stage air preheater. Flue gas and air flow in the countercurrent direction, the flue gas exchanges heat with the air in the turbolator heat exchange tubes, and a plurality of rows of guide plates are obliquely arranged at the top and the bottom of the frame respectively to prevent the flue gas from forming flue gas corridors on the upper side and the lower side. The turbulent flow is increased, so that the thickness of a retention bottom of main heat resistance of convective heat transfer is reduced, heat transfer is enhanced, and the heat transfer coefficient K is increased by 50% compared with that of a common tubular preheater.

The invention belongs to the technical field of boiler waste heat, gas and pressure utilization, and particularly relates to a lifting type intelligent soot blowing system and method for low-temperature area deposited soot, and the soot blowing system comprises a primary air pressurization soot blowing system, a vertical guide rail advancing soot blower and an intelligent control module. And the intelligent control module uses a blockage prediction intelligent algorithm and a dynamic soot blowing strategy. The primary air pressurization soot blowing system leads out part of dust-free primary air from an outlet of a boiler air pre-heater to serve as soot blowing primary air, and the dust-free primary air is conveyed to a lifting soot blower driven by a vertical guide rail after being pressurized to 0.5-0.8 MPa. The primary air pressurization soot blowing system is deeply coupled with the low-temperature economizer warm flue gas system, primary air is used as a soot blowing medium, the temperature of the soot blowing medium is about 320-350 DEG C, ammonium bisulfate condensate can be effectively dried and removed, and fly ash adhesion is reduced; and the soot blowing coverage rate reaches 100%, soot blowing according to needs is achieved, and the operation stability and economical efficiency of the unit are remarkably improved.

The invention relates to a method and a system for calculating air leakage of a three-section rotary air pre-heater. The method comprises the following steps: acquiring related data of primary air, secondary air and a flue gas bin; the air leakage amount of primary air and secondary air is calculated on line; wherein the air leakage amount of the primary air comprises the air leakage amount of the primary air leaking into the flue gas bin and the air leakage amount of the primary air leaking into the secondary air; the air leakage amount of the secondary air comprises the air leakage amount of the secondary air leaking into the flue gas bin; the average differential pressure among the primary air, the secondary air and the flue gas bin is calculated through a variable flow method; the average differential pressure corresponding to the primary air or the secondary air is changed, and the air leakage coefficient of the primary air leaking into the smoke bin, the air leakage coefficient of the primary air leaking into the secondary air and the air leakage coefficient of the secondary air leaking into the smoke bin are obtained; the temperature correction coefficients of the primary air and the secondary air are calculated through the temperature correction coefficients; the air leakage coefficient and the temperature correction coefficient are combined, and the corrected air leakage amount of the primary air leaking into the flue gas bin, the corrected air leakage amount of the primary air leaking into the secondary air and the corrected air leakage amount of the secondary air leaking into the flue gas bin are calculated.

The utility model relates to a solar energy and biomass energy coupled combined heat and power generation system which comprises an air preheater, a biomass boiler, a PV / T, a solar vacuum tube collector, a first-stage organic Rankine cycle assembly, a second-stage organic Rankine cycle assembly and a jet type refrigeration cycle assembly. A fluid outlet of the PV / T is connected with a fluid inlet of the solar vacuum tube collector, a smoke outlet of the biomass boiler is connected with a hot fluid inlet of the air preheater, and a cold fluid outlet of the air preheater is connected with an air inlet of the biomass boiler. According to the utility model, by designing a two-stage organic Rankine cycle structure, solar energy and biomass energy are better coupled, and the stability of the system is improved.

According to the online vacuumizing method and device for the heat pipe air pre-heater, the online vacuumizing method for the heat pipe air pre-heater is improved, on the premise that a cold source is not cut off, air exhaust operation is conducted on the heat pipe air pre-heater, and the phenomenon that when air exhaust operation is conducted on the heat pipe air pre-heater, the heat pipe air pre-heater is subjected to vacuum pumping operation is avoided. And normal operation of upstream and downstream equipment of the heat pipe air pre-heater is influenced. The heat pipe air pre-heater is applied to a boiler system, and the on-line vacuumizing method of the heat pipe air pre-heater comprises the steps that firstly, on the condition that the normal operation condition of the boiler system is kept, on-line air exhaust operation is conducted on a to-be-vacuumized pipe; and step SC, checking whether the vacuum degree of the to-be-vacuumized pipe is qualified or not, and if so, packaging the to-be-vacuumized pipe.