373results about "Combustion process" patented technology

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.

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 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.

The utility model relates to the technical field of flue gas heat exchangers, and discloses a sealing device of a rotary flue gas heat exchanger, which comprises two fixing frames, the left side and the right side of the fixing frame on the rear side are both in threaded connection with two bolts I, and the front ends of the bolts I penetrate through the left side and the right side of the fixing frame on the front side; the device comprises two fixing frames, the interiors of the two fixing frames are fixedly connected with the same exhaust pipe, the interior of the fixing frame on the rear side is fixedly connected with a fixing plate, the rear side of the fixing plate is fixedly connected with fan blades, the interior of the fixing frame on the front side is fixedly connected with a heat exchange pipe, and the sides, away from each other, of the two fixing frames are fixedly connected with air conveying hoppers. The gas conveying pipe is externally connected with the gas conveying pipe, the mounting plate is arranged on the outer wall of the connecting pipe and fastened with the gas conveying hopper through bolts, rapid mounting and dismounting are facilitated, the sealing ring is embedded in the mounting plate, after the gas conveying pipe is inserted, the sealing ring is attached to the pipe wall, gas leakage is eradicated, and therefore the situation that equipment is affected by gas leakage is avoided, and working efficiency is improved.

The present application provides a kind of energy-gathering disc pot rack and gas stove, it relates to the technical field of kitchen utensils, the energy-gathering disc pot rack includes energy-gathering disc body and support foot piece;Energy-gathering disc body is equipped with central through hole;Energy-gathering disc body is equipped with annular convex structure, the area between annular convex structure and the inner hole edge of central through hole forms secondary air preheating area.The gas stove includes energy-gathering disc pot rack.It relieves the technical problem that the existing gas stove exists in the combustion process, when the secondary air of lower temperature enters the central through hole of energy-gathering disc, there is diffusion to the gathering area of combustion heat energy air mass and heat exchange, reduces the temperature field of the gathering area of combustion heat energy air mass, so that the temperature of combustion flame is not high, causes heat energy loss, produces the technical problem of low combustion thermal efficiency, achieves the best effect of overall combustion condition, thereby improves the combustion thermal efficiency, and reduces the technical effect of CO exhaust emission.

The invention relates to the technical field of boiler heat energy recovery, in particular to an efficient heat energy recovery device for a boiler flue, the flue is provided with an air inlet section and an air outlet section, and the number of the heat energy recovery devices is at least two. The heat energy recovery device comprises a drainage pipe, an air heat exchanger is arranged in the drainage pipe, and the air heat exchanger is connected with an air inlet of the boiler; the first electromagnetic valve at the air inlet of the drainage pipe is opened, after high-temperature flue gas is injected into the drainage pipe, the first electromagnetic valve at the air inlet of the drainage pipe and the second electromagnetic valve at the air outlet of the drainage pipe are closed, and at the moment, the circulation channel is formed in the drainage pipe; due to the fact that heat of high-temperature flue gas is absorbed under the action of the air heat exchanger, circulating flow of the flue gas is formed according to the principle that hot air ascends and cold air descends, and heat in the flue gas is rapidly absorbed to the maximum extent.

The invention discloses a coal-fired unit power generation system with peak shaving capacity and a peak shaving method, and belongs to the technical field of thermal power generation. The system comprises a coal-fired power generation subsystem, a fused salt heat storage subsystem and a primary air heating subsystem; the coal-fired power generation subsystem comprises a boiler and a steam turbine generator set; the fused salt heat storage subsystem comprises a fused salt steam heat exchanger, a high-temperature fused salt tank, a low-temperature fused salt tank and a fused salt water supply heat exchanger; the primary air heating subsystem comprises a steam air heat exchanger. The peak shaving method comprises the steps that when the coal-fired unit power generation system operates at a low load or reduces the load, main steam exchanges heat with low-temperature fused salt, and part of heat is stored; steam at an outlet of the fused salt steam heat exchanger exchanges heat through the steam-air heat exchanger to reheat primary hot air of the boiler; when the load of the coal-fired unit power generation system rises, heat is released, and feed water is heated through the fused salt feed water heat exchanger. The peak regulation depth of the unit is greatly increased by extracting steam and storing heat and increasing the primary air temperature, and the output and combustion state of the low-load coal mill is improved.

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.

The utility model relates to the technical field of air pre-heaters, and discloses an automatic disengaging structure after air pre-heater motor fault, which comprises an electric slide rail component, the electric slide rail component comprises a slide rail body and a bottom plate arranged at the lower end of the slide rail body, the surface of the bottom plate is provided with a mounting hole, the slide rail body is connected with a slide block in a sliding manner, and the slide block is provided with a through hole. A connecting frame is fixedly installed at the upper end of the sliding block, limiting structures are arranged on the left side and the right side of the connecting frame, a motor is arranged on the connecting frame, a lubricating piece is further arranged on the outer side of the sliding block, the output end of the electric sliding rail component is connected with a permanent magnet coupler, a speed reducer is arranged on one side of the permanent magnet coupler, and the motor and the speed reducer are connected in a separable mode. In normal load operation, the motor end and the speed reducer end are in non-contact torque transmission, the function that the motor and the speed reducer are separated in the operation of the air preheater can be achieved, the electric sliding rail component drives the motor to move, the electric sliding rail component can automatically quit from being connected with the speed reducer, and it is avoided that motor faults affect rotation of the preheater.

Further improve combustion efficiency. [Solution] The reforming unit 10 has a combustion section 13, a reforming section 15, and a first outlet pipe 14. The combustion section 13 burns fuel off-gas in a space defined by at least a first bottom wall and a first side wall. The reforming section 15 reforms the raw fuel in a space defined by at least a first bottom wall, a first side wall, a second bottom wall, and a second side wall. The first outlet pipe 14 is provided on the first direction side of the combustion section 13. The first outlet pipe 14 discharges the combustion exhaust gas generated in the combustion section 13 from the combustion section 13.

The present invention relates to a turbo-compressor assembly of a chiller, comprising a compressor I, an electric motor III and a turbo-expander II arranged in a common housing, the common housing comprising a compressor body 19, an electric motor body 21, a turbo-expander body 20 and a shaft 13 mounted in the common housing in gas bearings opening the supply of working gas from the turbo-compressor assembly, the compressor impeller 1, the turbo-expander turbine impeller 5 and the electric motor rotor 8 being fixedly mounted on the shaft 13, the compressor impeller 1 and the turbine impeller 5 being arranged at opposite ends of the common shaft and the electric motor rotor 8 being arranged between them. Between the compressor impeller 1 and the rotor 8 of the electric motor, a shaft 13 is mounted in a first radial dynamic pressure gas bearing 101; between the turbine impeller 5 and the rotor 8 of the electric motor, a shaft 13 is mounted in a second radial dynamic pressure gas bearing 102; between the second radial dynamic pressure gas bearing 102 and the turbine impeller 5, a shaft is mounted in a thrust dynamic pressure gas bearing 11; an inlet for a secondary flow S2 of working gas of the turbo-compressor assembly to the first radial bearing 101 is formed between the inner wall of the body 19 of the compressor I and the shaft 13; and an inlet for a secondary flow S3 of working gas to the second radial bearing 102 and the thrust bearing 11 is formed between the inner wall of the body 20 of the turbo-expander II and the shaft 13.

The invention discloses a closed-loop control method based on the cleaning condition of an air preheater and a cleaning device, and relates to the technical field of maintenance of air preheaters of coal-fired power plants. The invention provides a closed-loop control method and an online cleaning device to solve the problems that in the prior art, the cleaning condition of an air preheater cannot be monitored in real time, a closed-loop control method feedback mechanism is lacked, and the cleaning effect is difficult to comprehensively evaluate. According to the closed-loop control method, closed-loop management of cleaning condition monitoring, cleaning action control and economical efficiency evaluation is achieved by measuring key parameters of the air pre-heater, establishing a numerical simulation model, calculating key indexes such as a resistance coefficient and a heat exchange coefficient and combining dynamic wall temperature control and an air energy pulse cleaning technology. The on-line cleaning device adopts an arc-shaped mother pipe and an adaptive flow guide cover, and by optimizing airflow distribution and adjusting the position of the mother pipe, the purging coverage rate and the sweeping effect of heat exchange pieces are improved, efficient and stable operation of the air preheater is guaranteed, and the economical efficiency and the safety of the generator set are improved.

This utility model discloses a suspended air preheater, belonging to the technical field of air preheater technology. The suspended air preheater includes a body, ventilation ducts installed at the top and bottom of the body, a first air inlet and a second air inlet located on both sides of the ventilation ducts, a rotating shaft installed on the ventilation ducts, and a rotor installed on the inner side of the body and rotatably connected to the rotating shaft. The body has mounting grooves at the top and bottom corresponding to the rotor. A sealing assembly is detachably connected to the inner side of each mounting groove. This assembly utilizes an elastic metal sealing body located inside a metal frame, which is subjected to an inward clamping force from a fastening spring installed in an elastic cavity. This causes the first and second sealing lips to fit tightly against the outer wall of the rotor, reducing the gap between the body and the rotor, improving the sealing effect, and employing mechanical cleaning, thus ensuring ventilation while reducing energy consumption.

The invention relates to the technical field of reactor residual heat removal, in particular to a residual heat removal pipeline condensation water hammer suppression system and method based on air filling, and the system comprises a loop subsystem, a natural circulation loop, an air injection subsystem and an ocean heat trap; the loop subsystem comprises a reactor core, a pressure container and a coolant circulating pipeline; the natural circulation loop comprises an intermediate heat exchanger, a seawater circulation pipeline and a high-temperature steam pipeline, the intermediate heat exchanger is connected with a loop subsystem, the seawater circulation pipeline is connected with the intermediate heat exchanger and the ocean heat trap, and the high-temperature steam pipeline is connected with an outlet of the intermediate heat exchanger and the ocean heat trap; the gas-phase system formed by mixing air and steam is used for avoiding generation of local negative pressure after steam condensation, condensation water hammers caused by liquid column collision are inhibited from the source, the risks of instantaneous high pressure, pipeline oscillation and the like can be effectively reduced, and the device adapts to the special structure and low-pressure operation attribute of the ocean floating nuclear energy platform.

The invention relates to the technical field of boiler equipment, in particular to a boiler air heater based on an octahedral array structure. According to the technical scheme, the boiler air heater based on the octahedral array structure comprises heat exchange pipeline units, the boiler air heater is formed by arranging the multiple heat exchange pipeline units in parallel in the steam flowing direction, each heat exchange pipeline unit comprises a regular octahedral pipeline and a cylindrical pipe, and multiple sets of regular octahedral pipelines are arranged on one side of each cylindrical pipe; the heat exchange unit formed by connecting a plurality of regular octahedron pipelines in series is adopted, each regular octahedron is of a structure with a complex space flow channel formed by connecting a plurality of edge pipes, when steam flows through each octahedron unit, the steam is subjected to multiple times of flow division and re-convergence processes, and therefore the heat transfer coefficient of the steam in the pipes is effectively increased, and the heat exchange efficiency of the steam is improved. And meanwhile, the non-straight structure on the outer surface of the octahedral pipeline also enhances the flow disturbance of the air side, the convection heat exchange efficiency outside the pipeline is improved, and the heat exchange capacity and the heat energy utilization efficiency of the air heater are remarkably improved.

The utility model discloses a kind of biomass boiler air preheater anticorrosion device, including air preheater, still including the guide air duct being connected with air preheater, guide air duct includes first air duct and second air duct, second air duct is connected in the inlet end of first air duct, the air preheater includes shell and the flue pipe assembly being set in the shell, flue pipe assembly includes tube bundle and the tube sheet being fixed in the both sides of tube bundle, the air preheater is vertically placed, the inner wall of the air preheater is provided with base layer, intermediate insulating layer is fixed outside the base layer, intermediate insulating layer outside fixedly set has metal reinforcing layer, the metal reinforcing layer closely adheres to intermediate insulating layer, the metal reinforcing layer and the shell of the air preheater form integral structure, first air duct is indoor air duct, second air duct is hot air return pipe, hot air return pipe is connected with the hot air outlet of the air preheater.

The utility model relates to a multi-parameter adjustable five-stage flue gas waste heat utilization system which comprises an air preheater, a flue gas heat exchanger in front of an electric precipitator, a low-low temperature electric precipitator, an induced draft fan, a flue gas heat exchanger in front of an absorption tower, a desulfurizing tower and a chimney which are sequentially connected through pipelines, the air preheater is also connected with a cold primary air system and a cold secondary air heating system; the cold secondary air heating system comprises an air heater, and the air heater is further connected with a flue gas heat exchanger in front of an electric precipitator and a flue gas heat exchanger in front of an absorption tower; the air preheater is provided with a bypass system; and an expansion water tank is arranged between the electric dust remover front flue gas heat exchanger and the absorption tower front flue gas heat exchanger. The flue gas waste heat utilization system has the advantages that the flue gas waste heat utilization rate can be effectively increased, energy is saved, and consumption is reduced; and cold secondary air is heated by the air heater, so that the problem of cold end corrosion of the air pre-heater can be effectively relieved.

The utility model belongs to the technical field of air preheaters, and particularly relates to a sealing, energy-saving and efficiency-improving device for a central cylinder of an air preheater, which is characterized in that an outer ring is mounted on a base arranged on the central cylinder, and an inner ring consisting of arc sections is arranged in a chute on the inner side of the outer ring; and the back surface of each arc section is connected with an elastic piece, so that the inner ring is in sealing contact with the outer wall of the central cylinder, air leakage in the air preheater is reduced, and energy conservation and efficiency improvement are facilitated. In the operation process of the air preheater, when the center cylinder shakes, the corresponding arc sections are ejected outwards in the radial direction, and when the center cylinder does not eject the arc sections outwards any more, under the action of the elastic pieces, the arc sections can continue to be in contact with the inner diameter face of the center cylinder again, and therefore the air preheater is prevented from being damaged. The elastic action type sealing structure does not generate a gap with the central cylinder due to the shaking of the central cylinder, so that the effective sealing service life is longer.

The invention relates to a flue gas efficient heat energy recovery white smoke elimination system and method, and belongs to the technical field of flue gas white smoke elimination, the system comprises a flue gas heat energy recovery device and a boiler, the flue gas heat energy recovery device is provided with a fresh air outlet, the fresh air outlet is connected with a butt-joint pipeline, an air valve A is installed on the cross section of the butt-joint pipeline, and an air valve B is installed on the side face of the butt-joint pipeline; an air valve C is mounted on the side surface of the air inducing pipe; the flue gas heat energy recovery device comprises a first-stage condensation heat regenerator, a second-stage condensation heat recoverer and a third-stage condensation heat recoverer, the top of the third-stage condensation heat recoverer is fixedly connected with an air collection box, a condensation heat recovery EC fan A is installed on one side of the second-stage condensation heat recoverer, and a condensation heat recovery EC fan B is installed on one side of the third-stage condensation heat recoverer; the system is low in energy consumption, simple and reliable in process and convenient to maintain, realizes combination of flue gas white smoke elimination and heat energy recovery, can recover a high-grade heat source, is high in automation degree, and really realizes unmanned operation.

The invention discloses an air heater heat exchange tube of a thermal power plant, which comprises a bearing part, a mounting part is arranged on the bearing part, and a control part is arranged on the mounting part; the mounting part comprises a connecting piece, a rotating piece is arranged on the connecting piece, and an extrusion piece is arranged on the rotating piece; the connecting piece comprises a connecting head, the end part of the connecting head is rotationally connected with a rotating head, a coil spring fixedly connected to the end part of the rotating head, a mounting elbow arranged on the connecting head, a sliding groove formed in the mounting elbow, and a locking groove formed in the sliding groove; according to the equipment, the connector is inserted into the mounting elbow, then the lifting piece is controlled to move to lie, the fixing piece fixes the mounting block to the supporting plate to complete locking, meanwhile, the extruding piece extrudes the rotating piece, the connecting piece and the mounting elbow are connected, and then rapid mounting is achieved; and when replacement is needed, disassembly can be completed only by controlling the lifting piece to descend.

The invention relates to two hybrid ball bearings and to a compressor bearing arrangement having two hybrid ball bearings for the rotatable support of a rotor of a compressor to a stator of the compressor. The two hybrid ball bearings are arranged face-to-face or back-to-back and are configured to have an optimal axial play according to an inner diameter of an annular inner raceway element of one of the hybrid ball bearings and a pitch diameter of one of the two hybrid ball bearings, and the long bearing service life related to the optimal compressor operation performance is achieved.

The utility model discloses a device for heating ammonium sulfate mother liquor by utilizing ammonia distillation waste heat, which belongs to the technical field of coke oven gas purification and comprises an ammonia distillation tower, a waste water pump, a mother liquor heater, a waste water cooler, a saturator, a full flow tank and a small mother liquor pump. A bottom outlet of the ammonia still is communicated with a wastewater pump inlet, a wastewater pump outlet is communicated with a hot side inlet of the mother liquor heater, a hot side outlet of the mother liquor heater is communicated with a hot side inlet of the wastewater cooler, and a hot side outlet of the wastewater cooler is communicated with an ammonia still wastewater outlet pipe. A mother liquor full-flow opening of the saturator is communicated with the full-flow groove through a pipeline, a bottom outlet of the full-flow groove is communicated with an inlet of the small mother liquor pump, an outlet of the small mother liquor pump is communicated with a cold-side inlet of the mother liquor heater, and a cold-side outlet of the mother liquor heater is communicated with a top spraying opening of the saturator through a pipeline. According to the device, the ammonium sulfate mother liquor is efficiently heated by utilizing the waste heat of the ammonia distillation wastewater, a traditional low-pressure steam heating mode is replaced, the operation cost is reduced while energy is saved, and the operation stability of the system is optimized.

This CO2 removal device for removing CO2 from a gas is provided with: a cylindrical housing; a plate-shaped first carrier for supporting, on the surface thereof, an adsorbent that adsorbs CO2, the first carrier being disposed inside the housing; and a plate-shaped second carrier for supporting, on the surface thereof, an adsorbent that adsorbs CO2, the second carrier being disposed inside the housing such that a gas flow path for circulating the gas is formed between the first carrier and the second carrier. The first carrier includes at least one first ridge portion that protrudes toward the second carrier and extends inside the gas flow path so as to be inclined at a first angle with respect to the extending direction of the housing. The second carrier includes at least one second ridge portion that protrudes toward the first carrier so as to be in contact with the first ridge portion and extends inside the gas flow path so as to be inclined at a second angle that intersects a direction in which the first ridge portion extends and is different from the first angle with respect to the extending direction.

The application discloses an air humidifier which is provided with an air inlet, an air outlet, a humidification backwater outlet, a humidification drainage outlet, a humidification water supplementing outlet, a hot fluid inlet and a hot fluid outlet; the flowing direction of air is the same as that of hot water for humidification, both of which adopt top-in and bottom-out, and the hot fluid for heating the humidification pipe flows into the hot fluid inlet at the bottom and flows out of the hot fluid outlet at the top. The baffle and the baffle plate are fixedly arranged on the air humidifier shell, one baffle is arranged on the top of the air humidifier and one baffle is arranged on the bottom of the air humidifier, and the baffle plate is arranged between the two baffles. The humidification backwater outlet is arranged above the upper baffle of the air humidifier, the humidification drainage outlet is arranged at the bottom of the air humidifier, and the height of the humidification backwater outlet is lower than that of the inlet at the top of the humidification pipe; the hot water for humidification flows into the air humidifier from the upper portion and flows out of the bottom, the hot water after humidifying the air flows out of the humidification drainage outlet and is circulated to the humidification backflow outlet through the pumping element.

The application discloses a rotary air preheater with a multilayer annular heat pipe, relates to the technical field of air preheating, and comprises an outer shell, an inner rotor, a center cylinder, a flue gas inlet, an air outlet, a flue gas outlet, an air inlet, a disturbance mechanism, a ring pipe group, a driving piece and a corrugated plate group. The center cylinder is coaxially arranged at the center position in the outer shell, the inner rotor is rotationally arranged on the outer wall of the center cylinder, the outer wall of the inner rotor is rotationally connected with the inner wall of the outer shell, the inner rotor is driven by the driving piece located at one side of the outer shell, the flue gas inlet and the air outlet are formed in the top end of the outer shell, and the flue gas outlet and the air inlet are formed in the bottom end of the outer shell. The corrugated plate group and the ring pipe group are arranged in the inner rotor, and a plurality of disturbance mechanisms are circumferentially arranged on the inner wall of the ring pipe group. The flue gas and the air are transversely washed to the annular heat pipe, the heat exchange coefficient of the flue gas and the air is strengthened, the deposition rate and deposition amount of ammonium bisulfate on the heated surface can be significantly slowed down, and the safety risk is reduced.

The utility model relates to the technical field of biomass fuel equipment. A biomass particle fireplace based on thermoelectric power generation comprises a fireplace body, the surface of the fireplace body is provided with a hearth, a feeding port and a charging box, the charging box is placed at the bottom of the hearth, a plurality of heat dissipation pipes are arranged above the hearth, and a thermoelectric power generation assembly, a feeding assembly and a smoke exhaust preheating assembly are arranged in the fireplace body. The hearth is matched with the feeding assembly to conduct continuous combustion heating. According to the biomass particle fireplace based on thermoelectric power generation, self power generation and power supply can be carried out through the internal and external temperature difference during fireplace combustion, heat energy of the fireplace is converted into electric energy, the heat supply requirement can be met, meanwhile, the comprehensive utilization rate of combustion can be increased, and self power supply of fireplace equipment is achieved. The technical problems that in the prior art, part of heat of an existing biomass fireplace is wasted, the fuel utilization rate is reduced, fireplace equipment needs to be supported by an external power source and is limited by electric power supply, and use inconvenience is increased are solved.

The invention discloses an emergency repair method and structure of an air preheater, the air preheater comprises a shell defining a flue gas channel and a tube bundle structure arranged in the shell and used for separating flue gas and air, the tube bundle structure comprises an upper tube plate, a lower tube plate and a plurality of first heat exchange tubes connected between the upper tube plate and the lower tube plate, the method comprises the following steps: S1, determining a plurality of damaged heat exchange tubes in a plurality of first heat exchange tubes; s2, the damaged heat exchange tubes are removed, so that a plurality of first tube holes corresponding to the damaged heat exchange tubes are formed in the upper tube plate and the lower tube plate respectively; s3, the multiple first pipe holes are blocked; and S4, a plurality of second pipe holes are formed in the upper pipe plate and the lower pipe plate, a plurality of bypass pipelines are installed, and the two ends of each bypass pipeline penetrate through the second pipe holes in the upper pipe plate and the lower pipe plate correspondingly and are fixed. By establishing the flue gas bypass, the problem of air leakage caused by large-area damage of the heat exchange tube is solved quickly at low cost.

This invention discloses a device and control method for improving the dynamic adjustment range of the wall temperature of a rotary air preheater by dividing the rings into N rings. N ring-shaped air inlet pipes, corresponding to the N rings, are installed at the cold end of at least one cold medium compartment. Each ring-shaped air inlet pipe is equipped with a ring-shaped regulating valve. The invention also includes ring-shaped cold air ducts and ring-shaped cold air duct regulating valves, with N ring-shaped cold air ducts and regulating valves. The ring-shaped cold air ducts, regulating valves, and air ring inlet pipes are in one-to-one correspondence. The ring-shaped cold air duct regulating valves are installed on the corresponding ring-shaped cold air ducts. The upstream end of the ring-shaped cold air duct flows into the corresponding ring-shaped air inlet pipe from the downstream end of the corresponding ring-shaped cold air duct regulating valve, and the downstream end flows into the flue gas compartment outlet. This invention not only ensures the range of ring-shaped temperature rise, thus better ensuring the anti-clogging effect, but also reduces or avoids the impact of high flue gas temperature in a certain ring on downstream dust removal equipment.