680 results about "Air preheater" patented technology

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 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 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 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 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 discloses an air preheater intelligent control system and method based on thermal imaging and artificial intelligence, and relates to the technical field of air preheater monitoring control, and the method comprises the following steps: collecting thermal imaging image data of the outer surface of an air preheater in real time by using a thermal imager; thermal imaging image data are preprocessed, an artificial intelligence algorithm is used for extracting temperature distribution characteristics of the outer surface of the air preheater, whether leakage or temperature abnormity occurs in the air preheater is judged by comparing the temperature distribution characteristics with a temperature distribution model in a normal state, and if yes, a worker is reminded to handle in time through a sound-light alarm signal; the temperature parameter of the outer surface of the air preheater is calculated, and when the detected temperature parameter exceeds the normal temperature range, the air preheater is automatically flushed, and the opening degree of a flue baffle is adjusted to control the temperature. According to the invention, rapid detection and intelligent control of leakage and temperature abnormity of the preheater can be realized, and the operation reliability and stability of the air preheater are improved.

The invention discloses an air pre-heater ash deposition online partition quantitative evaluation and ash removal decision method and system, and relates to the technical field of industrial artificial intelligence and machine learning, and the method comprises the steps: collecting multi-dimensional historical operation data covering all working conditions when an air pre-heater is in a reference clean state, and training and optimizing an initial health prediction model; performing real-time prediction through the initial health prediction model to obtain health reference data; automatically activating the initial health prediction model to autonomously evolve according to a preset triggering condition; and re-determining the health reference data through the health prediction model obtained through autonomous evolution. The problem of model drift is solved, and the long-term effectiveness of the diagnosis method is ensured. According to the invention, the manual maintenance cost is reduced, and the self-maintenance of the model is realized. And a complete intelligent closed loop of diagnosis, ash removal, model optimization and re-diagnosis is formed.

The invention provides a flue gas desulfurization and denitrification ultra-low emission DCS control system, belongs to the technical field of flue gas purification, and solves the technical problems that an existing desulfurization and denitrification DCS control system cannot realize deep synergy of desulfurization and denitrification and cannot perform ultra-low emission with accurate prediction and efficient response. The system comprises a boiler, an SCR denitration reactor connected with a flue gas outlet of the boiler, and an air pre-heater fixedly mounted at an outlet of the SCR denitration reactor, wherein an outlet of the air pre-heater is fixedly connected with a dust remover. According to the invention, through the arrangement of the data acquisition assembly and under the action of the collaborative optimization assembly, the system realizes an ammonia escape feedforward-compensation mechanism, the negative coupling between the denitration control unit and the desulfurization control unit is broken, the blockage of ammonium bisulfate is effectively prevented, the reliability of the desulfurization control unit is improved, and the service life of the desulfurization control unit is prolonged. Data acquisition, working condition identification, prediction and energy efficiency optimization are integrated on a unified DCS platform, and closed-loop intelligent control from sensing to decision making to execution is realized.

The invention discloses a gas-steam combined cycle power generation system and method coupled with thermochemical energy storage. Comprising a Ca (OH) 2 / CaO system thermochemical energy storage system, a high-pressure natural gas conveying pipeline, a natural gas differential pressure power generation system, a gas turbine power generation system, a waste heat boiler, a frequency division fluid preheater, a steam turbine power generation system, a water supply preheater, a valve A, a valve B, a valve C, an air preheater and a valve D, the Ca (OH) 2 / CaO system thermochemical energy storage system comprises a reactor body and a steam pocket, the system and the method can deeply integrate thermochemical energy storage, solar full spectrum utilization and pressure energy recovery, and meanwhile, multi-energy coupling and dynamic peak regulation can be achieved.

The application discloses a regenerative air preheater. The regenerative air preheater comprises a left regenerative chamber, a right regenerative chamber, an eight-way air tank and an actuator. The eight-way air tank is cuboid and horizontally arranged. The left regenerative chamber and the right regenerative chamber are horizontally arranged on the left side and the right side of the eight-way air tank respectively, and the actuator is arranged at one end of the eight-way air tank. The eight-way air tank mainly comprises an air tank shell, an internal slider and a sealing ring. The left side and the right side of the air tank shell are respectively provided with four shell interfaces, the left surface and the right surface of the internal slider are respectively provided with eight slider interfaces, and the shell interfaces and the slider interfaces are sealed by the sealing ring. The actuator makes intermittent linear reciprocating motion to push and pull the internal slider, so that the material flow passes through different internal channels and enters different regenerative chambers to complete heat exchange. The regenerative air preheater can be stacked in multiple groups to form multiple small, medium and large regenerative air preheaters for selection.

This invention discloses a boiler load adaptive regulation system based on solid thermal storage, relating to the field of power plant boiler combustion technology. The invention includes a boiler with an economizer arranged in its tail flue, and a flue gas extraction pipe connecting the boiler and the economizer. The end of the flue gas extraction pipe is connected to an ash separation component, the outlet of which is connected to the flue gas inlet of a solid thermal storage component, and the flue gas outlet of the solid thermal storage component is connected to the air preheater inlet. This invention extracts high- and medium-temperature flue gas from different locations in the boiler during rapid load reduction, stores the heat from the high-temperature flue gas using solid thermal storage technology, and releases the heat from the solid thermal storage component when rapid load increase is needed. This heat is then used to increase the primary air temperature and pulverized coal temperature through a heat exchanger, enhancing the combustion intensity of pulverized coal in the furnace. By reducing the amount of high-temperature flue gas in the boiler, the load change rate of the unit is effectively improved.

The utility model discloses a power plant waste heat comprehensive utilization system, and relates to the technical field of energy conservation and environmental protection. According to the technical key points, the system comprises a warm air blower connected with an indirect air cooling system, and the warm air blower is installed on the inlet side of a first induced draft fan; an air outlet of the first induced draft fan is connected with one end of the air side of the air preheater, and the other end of the air side of the air preheater is connected with the boiler; one end of the smoke side of the air preheater is connected with a flue at the tail of the boiler, and the other end of the smoke side of the air preheater is connected with an air inlet of the low-pressure economizer; a gas outlet of the low-pressure economizer is connected with the tail gas treatment module. According to the scheme, the exhaust steam waste heat of the steam turbine and the exhaust smoke waste heat of the boiler are comprehensively utilized at the same time, so that the two parts of waste heat are utilized to the greatest extent, the coal consumption of a power plant is reduced, and meanwhile, the heat pollution to the environment can be reduced.

The utility model discloses a furfural residue utilization system which comprises a hydrolysis kettle, a residue storage warehouse, a stokehole stock bin, a drying flue, a crusher, a vibrating screen, a furnace top gas-residue cyclone separator, a boiler, a bag-type dust collector, an air preheater, an induced draft fan, a desulfurizing tower, a demister, a denitration device and a chimney, a slag discharging opening of the hydrolysis kettle is communicated with an inlet of the slag storage warehouse, a discharging opening of the slag storage warehouse is communicated with a feeding opening of the stokehole stock bin, a discharging opening of the stokehole stock bin is communicated with a feeding opening of the spiral conveyor, a discharging opening of the spiral conveyor is communicated with a feeding opening of the drying flue, and a discharging opening of the drying flue is communicated with a feeding opening of the crusher. A discharging port of the crusher is communicated with a feeding port of the vibrating screen, an undersize product outlet of the vibrating screen is communicated with a feeding port of the furnace top gas-slag cyclone separator, and a discharging port of the feeding port of the furnace top gas-slag cyclone separator is communicated with a fuel inlet of the boiler. According to the furfural residue recycling device, furfural residues can be efficiently treated, resource utilization of the furfural residues is achieved, and the combustion efficiency of the boiler is guaranteed.

The present application belongs to the technical field of flue gas purification, and discloses a kind of automatic adjusting device of denitration ammonia injection gate, including wind pressure sensing element, pressure regulating opening device, temperature feedforward regulating device on ammonia injection head, according to mechanical mode automatic adjusting ammonia injection gate opening, realize according to flue gas volume automatic adjusting the ammonia injection amount of each ammonia injection gate;Device realizes the automatic control and adjustment of on-site equipment, both meets the national environmental protection to thermal power plant NO x The emission requirement, also reduces the consumption of ammonia injection of power plant, for sulfur-containing coal, reduces the generation of sulfuric acid hydrogen ammonium, avoids the plugging and hardening problem of air preheater, dust collector and tail flue, does not increase flue resistance, does not increase the specific consumption of induced draft fan, and does not cause the problem of unit load limitation.

The application discloses a kind of based on gap propagation diagram air preheater hot state rub risk section determination method and system, belong to air preheater technical field.Method includes according to the circumferential order of sector identification in rotary air preheater hot state operation and the connection relationship of compartment structure determination adjacent transfer edge, obtain propagation relationship;According to the propagation relationship, construct hot state deformation influence radial gap propagation diagram, and cold state reference gap in rotary air preheater hot state operation is mapped to each section node, obtain section reference gap;Hot state deformation influence radial gap propagation diagram, section temperature and operating state are input into GKAN propagation determination model, and the section hot state gap compression amount is obtained.This method constructs the propagation diagram of circumferential adjacent edge and compartment connection edge, and section state and propagation diagram are input into GKAN propagation determination model, and the section hot state gap compression amount is obtained, effective residual radial gap is calculated and compared with threshold to generate rub risk section mark, and finally determine radial sealing risk section range.

The embodiment of the invention discloses an air pre-heater air leakage rate detection method and device and a storage medium. The method comprises the steps that real-time operation parameters of an air pre-heater are obtained through a power plant control system; wherein the real-time operation parameters of the air pre-heater comprise the unit actual load, the air pre-heater outlet oxygen amount, the air pre-heater outlet smoke temperature, the air pre-heater inlet oxygen amount and the air pre-heater inlet smoke temperature; calculating the real-time air leakage rate of the air pre-heater based on the real-time operation parameters; and the real-time air leakage rate of the air pre-heater is compared with an air leakage degree judgment standard obtained based on historical data, and the current air leakage degree of the air pre-heater is determined. According to the technical scheme, the problem that an existing air pre-heater air leakage rate testing technology cannot achieve real-time monitoring and accurate prediction is solved, the real-time air leakage condition of a generator set in actual operation can be truly reflected, and the requirement of a power plant for real-time monitoring of the air pre-heater air leakage rate can be met.

The application discloses a boiler air preheater sector plate lifting system and relates to the technical gap lifting field.A laser gap control subsystem is used for collecting a gap signal value between a sector plate and a rotor flange face; a temperature control subsystem is used for collecting a flue gas outlet temperature; a lifting interval presetting subsystem is used for presetting a plurality of lifting intervals according to a set value; a direct lifting control subsystem is used for determining a direct lifting control strategy according to a relationship between the gap signal value and the lifting intervals; an indirect lifting control subsystem is used for determining an indirect lifting control strategy according to the flue gas outlet temperature when the laser gap control subsystem fails; and an execution control subsystem is used for controlling sector plate lifting to adjust a sealing gap according to the direct lifting control strategy / indirect lifting control strategy. Through the introduction of a multi-parameter fusion feedback mechanism, fine control is realized.

According to the intelligent diagnosis method and device for the operation state of the air preheater, by constructing a multi-mode state recognition and trend pre-judgment system of the air preheater, three operation states of'normal ', 'slight anomaly' and'serious anomaly 'can be quantitatively distinguished, historical trend visual comparison is supported, and scientific making of a maintenance plan is assisted; a modeling and multi-parameter combined judgment mechanism is adopted, manual experience is effectively replaced, low-probability and high-risk fault symptoms are accurately captured, false alarm and missing alarm are remarkably reduced, and dependence on manual inspection is reduced; each module of the system supports independent modeling and dynamic updating, has good adaptability and expandability, and is suitable for different units, capacities and manufacturer equipment; through early warning of hidden dangers such as blockage, leakage and aging in advance, non-planned furnace shutdown is avoided, meanwhile, the operation and maintenance rhythm is optimized, the operation resistance and energy consumption are reduced, the heat exchange efficiency is improved, and therefore the reliability and economical efficiency of equipment operation are enhanced.

The utility model discloses a deashing device for an air preheater, which belongs to the technical field of air preheaters and comprises a bottom plate, the air preheater is fixedly mounted at the upper end of the bottom plate, and a rotary deashing mechanism is mounted on the air preheater. The rotary ash removal mechanism comprises a transverse moving assembly and an autorotation ash removal assembly; a plurality of brushes are mounted on the self-rotating ash removal assembly; a reciprocating ash scraping mechanism is mounted at the upper end of the bottom plate; and the scraping plate is mounted on the reciprocating ash scraping mechanism. Through the mode, dust is prevented from being accumulated between the upper heat conduction pipe and the lower heat conduction pipe, the heat exchange efficiency of the heat conduction pipes and air is improved, an additional driving assembly is not needed, and the manufacturing cost is reduced; and dust cleaning is carried out on positions which are difficult to treat, so that the extra workload of workers is reduced, and the practicability of the device is further improved.

The utility model discloses a thermal power plant air preheater with nickel titanium alloy function coating belongs to air preheater technical field, a thermal power plant air preheater with nickel titanium alloy function coating includes the shell, a layer nickel titanium alloy function coating covers the shell outside, the heat exchange subassembly is rotationally arranged in the shell, the shell upper and lower sides are provided with the air inlet, the air outlet, the smoke outlet and the smoke inlet respectively with heat exchange subassembly intercommunication, this technical scheme can set up nickel titanium alloy function coating, can prevent the wall thickness thinning of air preheater because of abrasion, reduce the air preheater's air leakage rate, improve equipment overall integrity, and then reduce the maintenance use cost, can reduce the environmental pollution caused by the abrasion problem of air preheater simultaneously.

The utility model discloses a sealing brush special for air sealing of a rotary heat accumulating type air preheater, which is characterized in that one side of a first gland is fixedly connected with a rotor part, the other side of the first gland is provided with a first mounting groove, a plurality of first steel wire ropes are fixedly connected in the first mounting groove, and one side of a notch of the first gland is fixedly connected with a brush handle; a second gland is fixedly connected to the other side of the upper end of the brush handle, a second mounting groove is formed in the second gland located on one side of the brush handle, a plurality of second steel wire ropes are fixedly connected into the second mounting groove, and the second bristles, the brush strips and the first bristles all make contact with the sealing face. The utility model aims to provide the sealing brush which has better high temperature resistance and wear resistance and can effectively improve the sealing effect.

The utility model discloses a steam condensate cooling and recycling energy-saving system of an air heater in tobacco processing, and belongs to the technical field of tobacco processing. The steam condensate cooling and recycling energy-saving system of the air heater in tobacco processing comprises the air heater, a preheating unit and a recycling unit, a steam heat exchange cavity and an air conveying channel are arranged in the air heater, and the preheating unit comprises an air preheater and a first liquid discharging pipeline; one end of the first liquid discharge pipeline is communicated with an outlet of a steam heat exchange cavity of the air heater, the other end of the first liquid discharge pipeline is communicated with an inlet of a condensate water heat exchange cavity of the air preheater, and a drain valve is arranged on the first liquid discharge pipeline; the recycling unit comprises a condensate water recycling pipe and a water collecting tank, one end of the condensate water recycling pipe is communicated with an outlet of the condensate water heat exchange cavity of the air preheater, and the other end of the condensate water recycling pipe is communicated with the water collecting tank. According to the utility model, steam condensate water from the air heater can be reutilized, so that the energy-saving efficiency of the cigarette production line is improved.

The application discloses a composite pipe flue gas shunt type anti-corrosion air preheater and a dust cleaning device thereof, and belongs to the technical field of pipeline dust cleaning equipment. The air preheater comprises a shell and pipe boxes for sealing the two end portions of the shell, the pipe boxes are connected with the shell through pipe plates, a tube bundle is loaded in the shell, the tube bundle is composed of a plurality of bundle plates and a plurality of heat exchange pipes, the bundle plates at least include a first bundle plate and a second bundle plate, a plurality of vertical baffles are installed in the middle portion of the first bundle plate, a plurality of horizontal baffles are installed in the middle portion of the second bundle plate, the first bundle plate and the second bundle plate are arranged in multiple groups in the shell in a staggered mode, the heat exchange pipes are inserted into the second installation grooves among the multiple horizontal baffles along the first installation grooves among the adjacent vertical baffles, the end portions of the heat exchange pipes away from each other are inserted into the pipe plates, and the dust cleaning device is placed in the heat exchange pipes and used for removing the fouling on the inner walls of the heat exchange pipes.

This invention discloses an intelligent collaborative control system and method for preventing blockage and corrosion at the cold end of an air preheater. The system includes a hot air circulation module, a gradient temperature control layer, a swirl purging device, and an intelligent control system. The hot air circulation module forms an adjustable heat source by mixing airflows of different temperatures. The gradient temperature control layer is used to create a bottom-up temperature gradient at the cold end. The swirl purging device is used for efficient dry cleaning of ash accumulation on the heat exchange elements. The intelligent control system coordinates temperature regulation and the purging process based on operating parameters. This invention introduces a predictive model to anticipate pressure difference trends and combines it with an acid dew point temperature control strategy to achieve linked control of mixed hot air temperature regulation and preventative purging, thereby maintaining the cold end temperature stably within a safe range and promptly suppressing ash accumulation.

The application discloses a heat exchange system of an incinerator and the incinerator, and relates to the technical field of gasification combustion. The heat exchange system of the incinerator comprises an air preheater and a first heat exchange pipeline. The air preheater is provided with an air inlet, a heating air duct and an air outlet which are sequentially communicated. The first heat exchange pipeline comprises a first medium inlet, a first medium outlet, a first main heat absorption pipeline, a first auxiliary heat absorption pipeline and a first heat release pipeline. The first main heat absorption pipeline and the first auxiliary heat absorption pipeline are at least partially located in a heat exchange cavity of the incinerator, and the first heat release pipeline is at least partially located in the heating air duct. The first medium inlet, the first main heat absorption pipeline, the first heat release pipeline and the first medium outlet are sequentially communicated. The first heat exchange pipeline further comprises a first switch valve which is connected in parallel with the first auxiliary heat absorption pipeline. The heat exchange system of the incinerator can improve the temperature stability of the exhaust flue gas of the heat exchange cavity and improve the environmental protection performance of the incinerator.

The utility model provides an SCR denitration ammonia spraying device. The SCR denitration ammonia spraying device comprises a flue, and an ammonia spraying grid, a catalytic bed layer and an air pre-heater are sequentially arranged in the flue from top to bottom; a first gas detector and a second gas detector are respectively arranged on two opposite sides above the ammonia spraying grid; a third gas detector and a fourth gas detector are respectively arranged on two opposite sides below the catalytic bed layer; ammonia gas inlets in the two opposite sides of the ammonia spraying grid are connected with an ammonia gas supply device, the ammonia gas inlet in one side of the ammonia spraying grid is connected with a first standby valve through a first main valve, and the ammonia gas inlet in the other side of the ammonia spraying grid is connected with a second standby valve through a second main valve. According to the device disclosed by the invention, the accurate and real-time regulation and control of the ammonia spraying amount are realized through the matched use of the equipment, and the defect that the denitration effect is poor or ammonia escapes due to the fact that the ammonia spraying amount is difficult to adjust accurately in time when flue gas components fluctuate in a traditional ammonia spraying mode is overcome.

The utility model provides an air pre-heater on-line pulse cleaning device which comprises a pipe frame and a medium pipeline, the pipe frame comprises a main pipe, and a nozzle is arranged on the main pipe; the pipe frame is provided with a multi-medium coupler, the multi-medium coupler is connected with the mother pipe, the multi-medium coupler is communicated with the medium pipelines, the multi-medium coupler is used for converging media provided by the medium pipelines, and one or more medium pipelines provide pulse media. The online pulse cleaning device for the air pre-heater has the advantages that the multi-medium coupler is fully and uniformly combined with various cleaning media through the impact force of the pulse media, the confluence effect when the cleaning media are mixed or coupled can be fully exerted, and the overall cleaning effect and cleaning efficiency are improved; and the cleaning media are converged near the nozzles and the mother pipe, so that the occupation of the external space of the air pre-heater is reduced, and the loss of more conveying pressure of the converged cleaning media (particularly pulse media) is avoided.