902results about "Combustion process" 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 thermal equipment operation state dynamic test and compensation control, in particular to an AI-based boiler air pre-heater temperature uniformity regulation and control system, which comprises a collaborative closed-loop control network of a data acquisition module, an AI prediction module, a heat storage system control module, a temperature compensation control module and a thermal stress analysis module. The data acquisition module acquires flue gas temperature, coal quality parameters and load instructions in real time, the flue gas temperature, the coal quality parameters and the load instructions are transmitted to the AI prediction module through an industrial bus, XGBoost, LightGBM and a deep neural network model are used for carrying out spatial-temporal feature extraction on the evolution trend of a temperature field, and the heat storage system control module dynamically switches heat storage and release modes according to the load state. The heat distribution proportion among the multiple units is adjusted by combining the three-dimensional stress field distribution data of the thermal stress analysis module; the bottleneck of lack of thermal inertia regulation of an existing system is broken through, dynamic balance of a temperature field under the condition that thermal stress of a heat transfer element is controllable is achieved, and the heat exchange efficiency and operation stability of the air pre-heater are improved.

A bearing system includes a housing having an inner surface defining a bore and a slot, and a foil bearing assembly positioned within the bore. The foil bearing assembly includes an outer foil assembly, a bump foil assembly, and an inner foil assembly. The outer foil assembly includes an outer foil extending from a first outer foil end to a second outer foil end, and a first anti-rotation tab at the first outer foil end that is received by the slot to limit circumferential movement of the outer foil in a first direction. The inner foil assembly is secured to the outer foil and includes an inner foil extending from a first inner foil end to a second inner foil end, and a second anti-rotation tab at the second inner foil end that is received by the slot to limit circumferential movement of the inner foil in a second direction.

A solar tracker bearing apparatus mountable to an upright support post for rotatably supporting a torque tube beam of a solar tracker assembly and including: a rotatable bearing assembly supported for rotation about an axis of rotation by a stationary saddle assembly. The rotatable bearing assembly includes a central portion and first and second spaced apart arcuate peripheral portions, the central portion defining a beam slot, the first arcuate peripheral portion including a first arcuate rim bearing and the second arcuate peripheral portion including a second arcuate rim bearing, and the first and second rim bearings being spaced apart in a direction parallel to the axis of rotation of the rotatable bearing assembly. The stationary saddle assembly includes a first arcuate bearing race slidably supporting the first arcuate rim bearing and a spaced apart second arcuate bearing race slidably supporting the second arcuate rim bearing.

A magnetic bearing system (100) includes a rotary shaft (101) and a magnetic bearing (105, 107, 130) having an electromagnet coil (106, 108, 108B, 135, 136). One end of the electromagnet coil (106, 108, 108B, 135, 136) is connected to the neutral point of a first multi-phase winding (113, 115, 123, 125, 173, 181) having at least three or more phases.

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 discloses a tail afterburning system and method for increasing SCR inlet smoke temperature, the tail afterburning system comprises a boiler and a combustion chamber for mixed combustion of hydrogen and air, an economizer is arranged on a smoke channel of the boiler, a tail flue of the boiler is connected with a smoke inlet of an SCR denitration device, a smoke outlet of the combustion chamber is connected with the tail flue through a third bypass flue, and the third bypass flue is connected with the tail flue through a fourth bypass flue. The combustion chamber is connected with an outlet flue of an air pre-heater of the boiler through a second bypass flue, an induced draft fan is arranged in the second bypass flue, and the induced draft fan is used for feeding smoke in the outlet flue of the air pre-heater into the combustion chamber. The bypass flue and the oxyhydrogen burner are arranged at the tail, afterburning is conducted through the tail burner, hot flue gas obtained after afterburning enters the tail flue to be mixed with low-temperature flue gas, the SCR inlet temperature is effectively increased, it is ensured that SCR is normally put into operation, carbon emission is reduced, and emission control over pollution gas under the low load of a coal-fired unit is effectively achieved.

The invention provides an electro / thermochemical gradient hydrogen production system and method for solar radiation energy grading and residual light energy thermal complementary coupling. The system comprises a light condensation assembly; the frequency division assembly is used for grading solar spectrum radiation; a photovoltaic cell power generation device; the methane oxygen-enriched combustion high-temperature photovoltaic power generation device is used for realizing oxygen-enriched combustion of natural gas by utilizing residual heat heat energy and generating power by utilizing radiation energy generated by high-temperature flue gas generated after combustion; the solid oxide electrolytic tank device is used for pushing solid oxide to electrolyze water to produce hydrogen by utilizing heat energy and electric energy contained in the high-temperature flue gas step by step; and the thermal chemical reaction device is used for promoting each step of thermal chemical reaction by utilizing heat energy and electric energy contained in the high-temperature flue gas step by step. The energy source of the system is solar radiation and natural gas, hydrogen and electricity are produced, the system utilizes different energy conversion modes to achieve temperature gradient ordered conversion and utilization of residual light energy after solar frequency division, and complementary coupling of different qualities is achieved on the basis of energy gradient conversion.

The waste heat utilization equipment comprises a main flue, a bypass outlet and a bypass inlet are formed in the middle side wall of the main flue, a dust removal system is arranged on the main flue, and the bypass inlet is located in front of the dust removal system; an inlet of the bypass flue is connected with the bypass outlet, and an outlet of the bypass flue is connected with the bypass inlet; the heat exchanger is arranged on the bypass flue and connected with a water supply system of the boiler; the baffle device is arranged at an outlet of the bypass flue; the first temperature instrument is arranged on the side wall of the main flue and located between the bypass inlet and the dust removal system; and the controller is electrically connected with the baffle device and the first temperature instrument, and the controller is used for controlling the baffle opening degree of the baffle device based on the detected temperature of the first temperature instrument so that the flue gas temperature at the inlet of the dust removal system can be within a preset first temperature range. The technical problem that the waste heat utilization rate of the boiler is low is solved.

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 invention relates to waste heat recovery equipment and a natural gas hydrogen-doped combustion system. The waste heat recovery equipment comprises a first heat exchanger, a second heat exchanger and a spray tower, the first heat exchanger is provided with a first heat absorption side and a first heat release side, an outlet of the first heat absorption side is communicated with a combustion-supporting gas inlet of the combustor, the second heat exchanger is provided with a second heat absorption side and a second heat release side, and an inlet of the second heat release side is connected with a high-temperature flue gas outlet of the combustor. The spray tower is provided with a cooling water inlet, a smoke inlet, a smoke outlet and a spray water outlet, the smoke inlet is communicated with the outlet of the second heat release side, the spray water outlet is communicated with the inlet of the second heat absorption side, and the outlet of the second heat absorption side is communicated with the inlet of the first heat release side. According to the waste heat recovery equipment, two-stage waste heat recovery of high-temperature flue gas is achieved, the waste heat recovery efficiency is remarkably improved, combustion-supporting gas can be heated, accordingly, other combustion efficiency is improved, natural gas consumption and carbon emission are reduced, and the requirements for energy conservation and carbon reduction in the industrial high-temperature combustion process are met.

A heat exchange type burner for baking a torpedo ladle, comprising a Y-shaped burner (1), a gas pipe (2), a blast pipe (3), a connecting cover, (4) and a flue gas pipe (5), wherein the Y-shaped burner is respectively connected to the gas pipe and the blast pipe, the gas pipe is sleeved in the blast pipe, the blast pipe is connected to the connecting cover, one end of the blast pipe is sleeved in the flue gas pipe, and the flue gas pipe is connected to one end of the connecting cover. The heat exchange type burner further comprises an air distribution pipe (6) and a heat exchange fin (7), wherein the air distribution pipe is sleeved on the flue gas pipe, the air distribution pipe is communicated with the blast pipe, the heat exchange fin is fixed on the flue gas pipe, and the heat exchange fin is arranged between the air distribution pipe and the flue gas pipe. The burner can efficiently utilize flue gas heat to assist gas combustion, achieves high heat exchange efficiency and space utilization rate, has a good combustion effect, is easy to mount and dismount, and is convenient to use.

The utility model relates to the technical field of air preheaters of heating boilers, in particular to an air preheater of a heating boiler, which is characterized in that dust in air is filtered by starting an air inlet mechanism, the filtered dust is discharged into a heat exchange mechanism, and the air discharged by the air inlet mechanism is heated through heat dissipation of a heat dissipation mechanism. Hot air is discharged into the heat supply boiler by starting the discharging mechanism to preheat the heat supply boiler, the inner wall of the heat dissipation mechanism is cleaned by starting the cleaning mechanism, the heat dissipation function of the heat dissipation mechanism is prevented from being affected, and the practicability of the equipment is improved; comprising a smoke inlet mechanism; the smoke inlet mechanism is installed at the top end of the heat exchange mechanism, the heat dissipation mechanism is installed in the heat exchange mechanism, the air inlet mechanism is installed on the right side of the heat exchange mechanism, the exhaust mechanism is installed on the left side of the heat exchange mechanism, and the cleaning mechanism is installed at the top end of the heat exchange mechanism.

The utility model discloses a heat pipe type air preheater system which comprises a main body and an air preheater, the main body is arranged at the bottom of the rotary air preheater, the main body is composed of a plurality of heat pipe heat exchanger modules which are vertically arranged and parallel to one another, and each heat pipe heat exchanger module comprises an air channel and a flue which are separated from each other. A heat pipe heat exchanger is assembled in each heat pipe heat exchanger module and stretches across the air channel and the flue, and a baffle is arranged at an air inlet in the bottom of the air channel of each heat pipe heat exchanger module. The heat pipe type air preheater is used for thoroughly solving the blockage problem of a rotary air preheater, the blockage and corrosion phenomena of the air preheater are effectively treated, and accidents such as negative pressure fluctuation of a boiler hearth, fan surging and the like which influence safe operation of the boiler are avoided.

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 relates to the technical field of refractory brick tunnel kiln, and discloses a waste heat utilization device for a refractory brick tunnel kiln, including a heat recovery component and a preheating component, wherein the heat recovery component includes a kiln body, a recovery box is fixedly connected to the top of the kiln body, a heat storage box is fixedly connected to the top of the inner cavity of the recovery box, a blower is fixedly connected to the top of the recovery box, an air outlet on the right side of the blower is connected to a heat absorption pipe, and the end of the heat absorption pipe away from the blower passes through the inner cavity of the heat storage box. The beneficial effects achieved by the utility model are: the heat in the high-temperature flue gas is recovered and utilized by the heat recovery component, so that the heat is heated to heat the air entering the burner, and the normal temperature air is prevented from lowering its internal temperature after entering the burner, thereby increasing the fuel consumption; the partially recovered high-temperature air is directly transported to the preheating section of the kiln body through the preheating component to preheat the materials entering the kiln, further reducing the fuel consumption during the material roasting process, and improving the waste heat utilization rate of the tunnel kiln.

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 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 invention relates to the field of air pre-heater sealing, and discloses an automatic compensation type sealing device of an air pre-heater. According to the novel sealing device, the rotor can deform along with the change of the internal temperature of the air pre-heater so that the stable sealing effect can be automatically kept at any time, and the novel sealing device is composed of a sealing component, a driving component, a driving gear component and a compensation gear component. The sealing part is installed on one side of a radial partition plate of the air pre-heater through a fastener, and movement allowance is reserved in a sealing part installation hole. When the air pre-heater works in a hot state, the automatic compensation type sealing device of the air pre-heater provides compensation amount which is effectively complementary with a triangular air leakage area, effective dynamic compensation is achieved, operation is stable, and the air leakage rate is remarkably reduced. The sealing device is simple and reliable in structure, convenient to install, capable of facilitating overhaul and maintenance of the air pre-heater, high in overhaul efficiency and low in maintenance cost.

The invention provides a power supply coal consumption detection method and device for a coal-fired unit with a hot primary air heater. The method comprises the following steps: dividing a boundary for a heat balance system of the coal-fired unit with the hot primary air heater based on a preset rule; based on the heat balance system of the coal-fired unit after boundary division, the boiler fuel efficiency after air inlet temperature correction is determined; based on the steam turbine heat rate and the correction coefficient, the steam turbine heat rate after parameter correction is obtained; and determining the power supply coal consumption of the coal-fired unit based on the boiler fuel efficiency after the air inlet temperature correction, the steam turbine heat consumption rate after the parameter correction and the station service power consumption rate. The method can guide the detection and calculation of the power supply coal consumption of the coal-fired unit with the hot primary air heater, and provides technical reference for power plant personnel to carry out proper operation adjustment according to the data. And meanwhile, the economical efficiency of transformation of the hot primary air heater of the power plant can be evaluated, and the power plant is guided to carry out reasonable transformation evaluation and carry out reasonable parameter adjustment on the hot primary air heater.

Provided is an air-conditioning indoor unit. The air-conditioning indoor unit includes a plurality of centrifugal wind wheels, a motor drivingly connected to the plurality of centrifugal wind wheels, an electric control box disposed in an axial direction of the plurality of centrifugal wind wheels, and an evaporator disposed in a radial direction of the plurality of centrifugal wind wheels and obliquely disposed relative to a height direction of the air-conditioning indoor unit. By providing the plurality of centrifugal wind wheels and driving the plurality of centrifugal wind wheels by a same motor, when a size of the air-conditioning indoor unit is large, a constant air volume may be outputted. The electric control box is located in the axial direction of the centrifugal wind wheel and far away from the evaporator, to prevent the electric control box from being splashed by condensed water. In addition, since there is a large space when the centrifugal wind wheel is provided, the electric control box is located in the axial direction of the centrifugal wind wheel to more facilitate an arrangement of the electric control box. The evaporator is disposed obliquely relative to the air-conditioning indoor unit. In this way, a thickness of the air-conditioning indoor unit can be reduced, and heat exchange efficiency can be improved.

The utility model discloses a flue gas waste heat boiler in the technical field of energy conservation and environmental protection, comprising a boiler body, a second flue gas exhaust pipe is fixedly connected to one side of the superconducting heat pipe waste heat recovery device, a draft fan is fixedly installed on one side of the second flue gas exhaust pipe, and an air inlet pipe is fixedly connected to one side of the superconducting heat pipe waste heat recovery device. The waste heat of the flue gas inside the boiler body enters the inner sides of a heating box and the superconducting heat pipe waste heat recovery device from the first flue gas exhaust pipe, and is sent out from the second flue gas exhaust pipe to the draft fan after being cooled by the superconducting heat pipe waste heat recovery device after absorbing heat. Through the blower, the air inlet pipe and the heat inlet pipe, normal temperature air is blown and compressed into the inside of the air inlet pipe by the blower, and then enters the heating surface of the superconducting heat pipe waste heat recovery device, and is sent out by the heat inlet pipe after being heated by the superconducting heat pipe waste heat recovery device. The sent hot air can enter the inside of the boiler body for heating, and can also be used for combustion assistance or drying materials, thereby improving the practical effect of the device.

A heating system for use with a can dryer or oven includes a gas burner, an electrical heating element, a heating chamber structured to heat cans using air heated by the gas burner and / or the electrical heating element, a circulation system structured to move air from the gas burner and the electrical heating element to the heating chamber, and a control system structured to selectively control the gas burner and the electrical heating element to switch between a first mode where the gas burner and the electrical heating element are active and both heat air provided to the heating chamber and in a second mode where the gas burner is inactive and the electrical heating element is active.

The invention discloses a turbine-boiler coupling flexible heat regeneration method for deep peak regulation, and relates to the technical field of thermal power plant unit steam deep peak regulation. Comprising the steps that boiler fuel supply and combustion intensity are reduced, and a unit enters a low-load operation state; extracting part of high-temperature and high-pressure steam from a main steam pipeline in front of a steam turbine as a heat source; the pressure of the extracted high-temperature and high-pressure steam is reduced through a temperature and pressure reducing device, and water is sprayed for cooling; steam is introduced into the heat exchanger to release heat, primary air and secondary air are heated, and air needed by combustion is preheated through steam waste heat; the steam subjected to air heating exchanges heat with feed water through a first high-pressure heater; the amount of high-temperature and high-pressure steam extracted from a main steam pipeline in front of a steam turbine is adjusted, the load and the system efficiency are balanced, the steam distribution proportion and parameter setting are optimized, and deep peak regulation is achieved. Steam waste heat is comprehensively utilized to increase the air temperature, energy waste during peak regulation is reduced, and the overall efficiency of the system is improved.

The embodiment of the invention provides a foldable portable firewood stove, which belongs to the technical field of burners and comprises a base, a stove body and a stove head. According to the combustion structure, an air blower is adopted to pressurize and intake air, the air is preheated and then fed into the lower portion, the middle portion and the upper portion of the inner container through the first air inlet hole, the second air inlet hole and the third air inlet hole for combustion supporting, and fuel is subjected to incomplete combustion, dry distillation and gasification in the lower portion of the inner container in an oxygen-deficient state; the incompletely combusted flue gas is mixed with preheated high-temperature combustion-supporting gas at the upper part of the inner container for secondary combustion, the area of a fire outlet at the upper part of the inner container is reduced, the pressure of the fire outlet is increased, so that flames are jetted out, and the flame energy is converged. Particularly, after being stored, the whole appearance is regular to be a cylinder, outdoor packaging and carrying are convenient, the device can be used for outdoor cooking of 5-10 people, a cylindrical battery box with a replaceable battery is further designed, the battery is convenient to replace, the service time is prolonged, the whole device is designed to be light, and the total weight is smaller than 1300 g.

The present invention relates to a flexible sealing method for an air preheater. Flexible contact sealing devices (10) are installed at the upper, lower, left, and right sides of each straight pipe interface (1) of the air preheater, and boxed spring sealing devices (20) are installed at the adjacent positions of the four corners. A soft sealing layer (5) is filled in the adjacent side gaps between the boxed spring sealing devices (20) and the flexible contact sealing devices (10). Its installation includes seven steps. The flexible sealing method for an air preheater of the present invention has better sealing effect, convenient maintenance, and long service life.

The invention relates to a dual-mode air preheater flushing system which comprises an air preheater, the air preheater comprises a shell and a heat transfer element, the heat transfer element is rotationally arranged in the shell, and the dual-mode air preheater flushing system further comprises a state detection module, a flushing structure and an ash outlet; the flushing structure comprises an annular rail, a straight guide rail and a flushing pipe with a high-pressure bundling nozzle, the annular rail is arranged around the bottom surface of the heat transfer element, the flushing pipe realizes radial movement through a linear driving mechanism arranged on the straight guide rail, and the bottom of the straight guide rail is in sliding connection with the annular rail; the dual-mode air preheater flushing system integrates an operation flushing mode and a shutdown flushing mode. The state detection module switches flushing modes by monitoring the state of a mandrel of a heat transfer element, an ash outlet is formed in the bottom of the shell and provided with an ash discharging valve capable of being opened and closed, and coordination of dynamic flushing in operation and precise positioning deep flushing after shutdown can be achieved.