186 results about "Recovery boiler" patented technology

The invention discloses a low-carbon flexible coal-fired unit power control system and method, and relates to the technical field of power systems, and the system comprises a cascade waste heat recovery module, a boiler deep regulation and control module, a thermal coordination module, an environmental protection and emission reduction module, an intelligent operation scheduling module and an energy efficiency monitoring module. The gradient waste heat recovery module carries out gradient recovery on flue gas heat energy according to temperature zone grades; the boiler depth regulation and control module is used for regulating combustion air supply and heat absorption paths to realize low-load stable combustion; the thermal coordination module dynamically distributes thermal loads between the multiple heat sources and the thermal units; the environmental protection and emission reduction module jointly controls desulfurization, denitration and wastewater resourceful treatment; the intelligent operation scheduling module generates a load regulation and control instruction and coordinates multi-module response; the energy efficiency monitoring module collects and analyzes energy consumption and emission indexes and assists strategy optimization. The energy efficiency utilization and emission control capability of the unit under the deep peak regulation condition is improved, and flexible, efficient and low-carbon operation is achieved.

The utility model relates to a blow-off flash steam recovery system for a heat recovery coke oven waste heat boiler, which is characterized in that heat recovery boilers are provided with heat recovery boiler drums, the bottoms of the heat recovery boilers are provided with heat recovery boiler blow-off pipes, and sewage outlets of the heat recovery boiler drums are connected with sewage inlets II of corresponding blow-off flash tanks through pipelines II; a blow-off pipe of the heat recovery boiler is connected with a first sewage inlet of the corresponding blow-off flash tank through a first pipeline, the top end of each blow-off flash tank is connected with an inlet of the steam compressor unit through a third pipeline, and an outlet of the steam compressor unit is connected with the low-pressure steam pipe network through a fourth pipeline. The heat recovery system has the advantages that pollution discharge flash steam of all the heat recovery boilers is recovered through the header pipe, the number of devices is reduced, and investment optimization and operation maintenance of the devices are facilitated; the steam compressor unit sucks flash steam, the flash steam is compressed and boosted to low-pressure steam, the low-pressure steam is connected to a low-pressure steam pipe network through an outlet pipeline of the steam compressor, and white steam caused by blow-off steam diffusion is avoided.

The utility model relates to the technical field of grate coolers, and discloses a grate cooler waste heat recovery boiler which comprises a boiler structure assembly, a base assembly is installed at the lower end of the boiler structure assembly, a structure rod is installed at the lower end of the base assembly, a connecting plate is installed at the upper end of the structure rod, and an adjusting rod is installed at the upper end of the connecting plate. A stabilizing plate is mounted at the upper end of the adjusting rod, a conveying assembly is mounted on the right side of the upper end of the boiler structure assembly, a storage frame is mounted at the upper end of the conveying assembly, a uniform rod is mounted in the storage frame, a connecting pipe is mounted at the lower end of the storage frame, and a second filtering plate is mounted in the connecting pipe; the grate cooler waste heat recovery device has the advantages that the problems that waste heat is recovered after a grate cooler is used, heat gas cannot be uniformly conveyed when a waste heat recovery boiler is used, cement powder is doped in the waste heat gas, and consequently the waste heat gas cannot be discharged into the air subsequently are effectively solved, and the technical problems are solved.

The utility model relates to the field of boiler waste heat recovery equipment, in particular to a waste heat recycling device of a flue gas waste heat recovery boiler, which comprises a boiler body and a filter component. The filter assembly comprises a shell, a mounting seat, a filter seat, a connecting pipe, a cleaning component and a recycling component, the shell is fixedly connected with the boiler body, the mounting seat is fixedly connected with the shell, the filter seat is rotatably connected with the mounting seat, and the connecting pipe is fixedly connected with the mounting seat. Smoke firstly penetrates through the smoke inlet in the mounting seat, then is filtered by the filter seat and then enters the shell, finally the smoke is introduced into the recovery component through the connecting pipe, and waste heat in the smoke is recovered through the recovery component, so that the smoke is filtered, and the smoke is prevented from being attached to the interior of the recovery component to influence the heat transfer efficiency.

The utility model discloses an energy-saving concentrated water treatment system which comprises a waste heat recovery system and a concentrated water treatment system, high-temperature flue gas of a boiler is extracted through an induced draft fan, and the waste heat recovery system achieves heat transfer through an internal circulation medium and comprises a first heat exchanger arranged on an air duct of an outlet of the induced draft fan, a compressor and a second heat exchanger, the outer circulating medium of the shell pass of the second heat exchanger exchanges heat with the inner circulating medium of the tube pass, and then is conveyed to a concentrated water treatment system through a pipeline. According to the structure, high-temperature flue gas waste heat of the boiler is efficiently recovered, and a mechanical steam recompression technology or a multi-effect evaporation technology is combined, so that the concentrated water treatment system efficiently treats concentrated water, the external energy consumption is reduced, and the operation cost is reduced.

The application discloses a flue gas recovery system in a calcination zinc sulfide process and relates to the technical field of zinc sulfide production. The flue gas recovery system comprises, which are connected by pipelines in sequence, a waste heat recovery boiler, a bag-type dust collector, an electrostatic precipitator, a mixed converter, a cyclone separator, an absorption tower and a spray tower. The mixed converter comprises an outer cavity, an inner cavity and a tail gas inlet pipe. The tail gas inlet pipe is connected with one end of the inner cavity. The outer cavity is provided with a medium inlet at the end far from the tail gas inlet pipe. The outer cavity is provided with a medium outlet at the end far from the medium inlet. The inner cavity is provided with a tail gas outlet pipe at the end far from the tail gas inlet pipe. An oxygen inlet and a powder inlet are installed on the side wall of the inner cavity. The inner cavity is internally provided with a turbulence column. Under the guidance of the turbulence column, the tail gas, oxygen and catalyst powder can be fully mixed, which can accelerate the reaction speed of sulfur dioxide and oxygen in the tail gas, thereby accelerating the generation speed and quality of sulfur trioxide.

The invention designs a power plant waste heat utilization comprehensive energy supply system combining fused salt with high-pressure hot water heat storage. The power plant waste heat utilization comprehensive energy supply system comprises a boiler, a fused salt heat storage subsystem and a hot water heat storage subsystem. The fused salt heat storage subsystem heats fused salt through boiler steam, and closed circulation is formed through a high-temperature fused salt tank, a low-temperature fused salt tank and a pump body. The hot water heat storage subsystem comprises a plurality of steam converters, a heat exchanger and a hot water heat storage tank; wherein the first steam converter is arranged between the fused salt and the hot water subsystem, high-pressure hot water from the first hot water heat storage tank is heated into steam through high-temperature fused salt, and the steam is used for driving a steam turbine to generate electricity or supplying heat to the outside through the third steam converter; and the second heat exchanger is connected in series in the loop to recover boiler tail flue gas waste heat. Through cascade coupling of fused salt and high-pressure hot water, the high-temperature hot water in the heat storage tank is used for increasing the heat exchange water inlet temperature, freezing and blocking during fused salt heat exchange are effectively prevented, the use amount of expensive fused salt is greatly reduced, flexible switching of power generation, heat storage and multiple heat supply modes is achieved through multi-valve control, and the energy-saving and environment-friendly effects are achieved. The energy utilization rate and the operation flexibility of the power plant are obviously improved.

The invention relates to the technical field of waste heat recovery. The efficient energy-saving flue gas waste heat deep recovery boiler device comprises a base assembly, a cavity clamping and waste heat absorbing assembly and a top cleaning and waste heat driving assembly, and a boiler waste heat recovery hollow cavity is formed in the base assembly; the clamping and absorbing assembly comprises two sets of supporting and adjusting units and four annularly-distributed arc-shaped heat absorbing air bags and can be attached to the outer wall of the cavity in a self-adaptive mode. The top assembly achieves self-cleaning through the foldable rubber cleaning piece and the waste heat driving linkage mechanism. During working, the driving mechanism drives the air bag to be close to the cavity to strengthen heat absorption, flue gas waste heat drives the wind power propeller at the same time, and the cleaning piece slides up and down to remove accumulated dust. Double recovery of outer wall heat absorption and in-cavity waste heat reguiding is achieved, extra ash removal energy consumption is not needed, the device is suitable for cavities of different specifications, the problems that a traditional device is not thorough in recovery and tedious in maintenance are solved, and the energy utilization rate is increased.

This utility model discloses an exhaust structure for a dissolving tank in an alkali recovery boiler, including a dissolving tank shell, an exhaust pipe installed on the dissolving tank shell, an exhaust pipe connecting box inside the dissolving tank, an outlet of the exhaust pipe connecting box connected to the inlet of the exhaust pipe, a grid installed at the inlet of the exhaust pipe connecting box, and flushing pipes installed on both the exhaust pipe connecting box and the grid, with the flushing pipes connected to pipes, allowing water to flow into the exhaust pipe connecting box along the pipes and flushing pipes; when gas passes through the grid, dust and unvaporized liquid droplets in the gas are captured by the grid, purifying the gas discharged through the dissolving tank by using the grid, reducing the dust content of the discharged gas and increasing the dryness of the gas, and the flushing pipes are installed to periodically flush the exhaust pipe connecting box and the grid, reducing the risk of sodium salt caking and corrosion in the exhaust pipe, and improving the continuous operation cycle of the system.

In a start-up method of a combined cycle unit, the following procedures are executed: a gas turbine start-up procedure to increase an output of a gas turbine to a rated output; a bleeder procedure to start supplying steam to a steam turbine when a temperature of steam from a waste heat recovery boiler reaches a temperature set in advance or more; and an ST output control procedure to control a flow rate of the steam flowing into the steam turbine after incorporation of a generator to increase an output of the generator in accordance with a target output change pattern. In the ST output control procedure, when a thermal stress reaches a first thermal stress set in advance or more, the flow rate of the steam flowing into the steam turbine is controlled to make a change in the output of the generator smaller than that indicated by the target output change pattern.

The utility model discloses a coal power unit boiler primary air production and application system based on the pinch point technology, and belongs to the technical field of waste heat utilization. Comprising a boiler, a steam turbine, a steam turbine generator, a second primary fan, a cold source loss utilization device, a heat supply gradient utilization device, a coal pulverizing system, an external heat supply header, a flow adjusting door and a hot air communication door. The cold source loss utilization device is used for avoiding cold source loss discharged to the cooling tower in the power generation process, the heat supply gradient utilization device is used for replacing an original heat supply steam temperature reduction device, the high temperature of primary air of the boiler can be kept when a unit is in low load, normal operation of a boiler pulverizing system and a combustion system is guaranteed, and deep peak regulation of a power plant is achieved. The problems that a traditional waste heat application system cannot recover original high-quality heat energy of a boiler to produce high-temperature primary air, the loss of the high-quality heat energy is large, meanwhile, the high temperature of the primary air of the boiler is difficult to keep when a unit is low in load, and normal operation of a boiler pulverizing system and a combustion system cannot be guaranteed are solved.

The present application relates to a kind of alkali recovery furnace water washing process, the process includes the following steps: step one: after alkali recovery furnace shutdown, open disc valve, plug valve and hearth furnace door, carry out hearth cooling;Step two: after cold furnace, washing water is pumped to alkali recovery furnace soot blower by feed water pump, by soot blower flushes the surface of heat exchange element, and the slagging and coking material therein is cleaned up completely;Washing waste water is recycled by dissolving tank and venting tank;Step three: after washing furnace, by hot air into air supply system, air draft system exhaust, dry hearth and heat exchange element;Step four: after drying furnace, in chute pouring castable, repair the part that is washed away by combustion melt and washing water, a kind of alkali recovery furnace water washing process designed by the present application can conveniently clean ash and remove coke with high efficiency, good effect, can effectively guarantee the cleanliness of heat exchange element, improve alkali recovery furnace operating efficiency.

Disclosed is an apparatus for conversion of ammonia into oxides of nitrogen which may comprise an adiabatic burner (108), a set of platinum / rhodium alloy catalytic gauzes (102A), (102B), and (102C), a waste heat recovery boiler (WHRB) (110), an absorption tower (302A), (302B), (302C), (302D) and (302E), a NaOH tank (306) and a surge tank (304). Further, the adiabatic burner may be configured to carry out catalytic oxidation of air and ammonia, using catalytic gauzes (102A), (102B), and (102C) of platinum / rhodium alloy. Further, the mixture of air and ammonia may be selectively oxidized to oxides of nitrogen, which may be absorbed in an alkali medium in the absorption tower (302A), (302B), (302C), (302D) and (302E), to yield sodium nitrites and nitrates.

The invention discloses a straight type waste heat recovery boiler, and relates to the technical field of boilers, the straight type waste heat recovery boiler comprises a mounting base, a vertical boiler is mounted at the top end of the mounting base, a power conversion and spraying filtering mechanism is arranged at the top end of the vertical boiler, and the power conversion and spraying filtering mechanism comprises a smoke exhaust straight cylinder; the boiler is scientific and reasonable in structure and safe and convenient to use, a power conversion and spraying filtering mechanism is arranged, the flowing speed of rising waste gas is increased through a Bernoulli air flue, the smoke exhaust effect is improved, and the smoke exhaust effect is improved. By utilizing the cooperation of a wind power rotary vane, a rotary vane connecting shaft, a central rotating shaft and a hollow vertical cylinder, the high-temperature waste gas which rapidly rises can be conveniently utilized, power is generated, the hollow vertical cylinder is pushed to rotate, and then residual impurities on the filter screen are cleaned through the cooperation of a chain wheel, a transmission chain, a driven rotating rod and a rotating scraping plate.

A gasification apparatus produces syngas from waste materials without oxygen. The gas generator features a gas crossflow and up-flow design with drying, pyrolysis, and carbon reaction zones. A furnace heats gas from the gas generator, adding steam and heating it to 800-950°C for high methane syngas or 1000-1050°C for low methane syngas in a convective or convective and radiant coil. The hot product gas supplies the generator's heat needs via a manifold, while excess gas enters a heat recovery boiler to produce steam for reforming. The syngas primarily contains CO and H2, with minimal CH4, H2O, and CO2, offering high concentrations of valuable components. The apparatus eliminates tar and higher hydrocarbons, is fully scalable, and adjusts methane content by controlling gas flow through the coils while meeting the heat demands of all zones.

The invention relates to the technical field of coking, and discloses a coke oven flue gas waste heat recovery boiler and a waste heat boiler acid dew corrosion prevention method, the coke oven flue gas waste heat recovery boiler comprises a steam pocket, a circulating pump and fin heat exchange tubes; the steam pocket is connected with the fin heat exchange tube and is also connected with the circulating pump; and the circulating pump is also connected with the fin heat exchange tube. A natural circulation mode of the boiler is changed into forced circulation, and uniform circulation of the boiler is guaranteed, so that stable temperature of the pipe wall is guaranteed, and acid dew corrosion and ash deposition are avoided.

The utility model relates to the related technical field of single crystal furnaces, in particular to an energy-saving and environment-friendly flue gas waste heat recovery boiler which comprises a base and a boiler body, the boiler body is mounted at the top of the base, and the top of the boiler body is communicated with a gas outlet pipe; the connecting pipe is communicated with one end of the air outlet pipe, a frame body is installed in the connecting pipe, and a filter screen used for filtering smoke, dust and particulate matter is fixed to the inner wall of the frame body. The frame body and the filter screen are detached, the filter screen can be conveniently detached and replaced subsequently, the problem that the filter screen is deformed and is inconvenient to replace due to long-time use is avoided, and a connecting block rotating rod can enable bristles to be inserted into filter holes of the filter screen, dredge the filter holes and clean blockages in the filter holes.

The invention relates to the field of waste heat recovery, in particular to thermal power plant boiler waste heat recovery equipment which comprises a tank body, a plurality of heated modules used for recovering boiler smoke waste heat are arranged in the tank body, a preheating tank used for utilizing coal dust waste heat is arranged outside the tank body in a sleeving mode, and a horizontal flue is arranged at the bottom of the tank body and used for conveying boiler smoke into the tank body. The outer side wall of the preheating tank is communicated with a smoke exhaust pipe; by arranging the preheating tank and the heated module in the tank body, working medium water can efficiently absorb waste heat in boiler flue gas in the process of passing through the preheating tank and the heated module, so that the temperature of the working medium water is increased, the high-temperature working medium water is subsequently used for acting of a turbine, energy conversion is achieved, and the utilization rate of the flue gas waste heat is further increased; the cleaning mechanism is arranged, coal dust on the surfaces of the first heated cover and the second heated cover can be automatically removed, and the situation that the heat exchange efficiency of equipment is affected by coal dust accumulation is avoided.

The invention relates to the field of large waste heat recovery boiler technical equipment, and discloses a waste heat boiler shell plate and thermal insulation material integrated manufacturing construction technology which comprises the steps that part plates are blanked; the assembly of the shell comprises the following steps: a, processing the column body; b, processing the honeycomb connection beam; c, processing the access door; d, assembling, welding and galvanizing the column; e, assembling and welding a column frame; f, assembling and welding the shell plate; and g, other parts are installed. And meanwhile, the influence of construction on the environment is reduced, a large number of high-altitude operation and scaffold measures are reduced, the project progress is accelerated, the heat efficiency of the boiler is greatly improved by applying the shell plate and Morgan super cotton integrated manufacturing technology, and economic benefits and social benefits are achieved.

A heat exchanger tube block is stacked on another heat exchanger tube block in an upper-lower direction and connected to the another heat exchanger tube block. The heat exchanger tube block includes: a duct casing wherein exhaust gas containing dust flows in the upper-lower direction; a heat exchanger tube in the duct casing extends horizontally; an inlet header connects to the heat exchanger tube inlet; an outlet header connected to an outlet of the heat exchanger tube; and a vibration transmitting member transmitting vibration, applied to an upper end part of the vibration transmitting member, to the heat exchanger tube to make the dust accumulating on the heat exchanger tube fall. A lower end of the duct casing is formed horizontally. The inlet header is located higher than the lower end of the duct casing. The outlet header is located higher than the lower end of the duct casing.

A startup burner assembly for a recovery boiler, the startup burner assembly includes a housing having a burner end and a second end distal to the burner end; a main fuel conduit disposed within the housing; and at least one high-pressure air conduit disposed within the burner end of the housing. The high-pressure air conduit includes at least one angled air injection nozzle configured to direct high-pressure air exiting the burner end of the startup burner assembly in a rotational direction.

The present invention discloses a system for improving the heating capacity of a heating unit, which includes a steam turbine generator set, a heater, a heat user, a heating component, and a first branch. The steam turbine generator set includes a main body, a boiler, and an economizer connected in sequence. The boiler is used to heat the main body, and the economizer is used to recover the waste heat of the exhaust gas from the boiler. The main body has an air outlet, and the heater is connected to the air outlet and the heat user. The steam turbine generator set passes exhaust steam into the heater through the air outlet to heat water in the heater. The heated water is used to provide heat to the heat user. The heating component includes a heating element and a water storage tank. The water storage tank can be connected to the heat user and supply heat to the heat user through the heated water. The first branch and the economizer are arranged in parallel. The economizer can be connected to the heat user to use the waste heat in the economizer to provide heat to the heat user. The system for improving the heating capacity of the heating unit according to the embodiment of the present invention has high application stability, small modification scope, and high operational reliability.

The utility model belongs to the boiler fuel recovery technical field, concretely relates to a coal ash and coal powder device of recovery boiler, include: casing, the partition plate is fixed in the inside of casing, and the inside of casing is divided into first cavity, second cavity and third cavity, material collecting part sets up in the outer wall of casing, and material collecting part extends to the inside of casing, and the extension is located in first cavity and second cavity respectively, the air draft part sets up in the outside of casing, the adjusting part sets up in the third cavity of casing, and input end is connected with the air draft part, and output end extends and communicates to first cavity and second cavity respectively. The utility model solves the energy waste problem caused by the coal powder being treated as garbage on one hand, solves the problem of causing harm to human body and wasting manpower and material resources by manual cleaning on the other hand.

The invention provides a flue gas denitration purification system for an alkali recovery boiler in the papermaking industry, and relates to the technical field of denitration. The flue gas denitration purification system comprises a denitration tower and a compressed air component. The denitration tower comprises an inlet, a reaction part and an outlet. The outlet is connected to the bottom end of the reaction part, and the inlet is connected to the top end of the reaction part. An air outlet hood which is hollow inside and open at both ends is arranged in the inlet. The outer wall of the air outlet hood and the inner wall of the inlet together form a receiving groove which is closed at the bottom and open at the top. A centrifugal component is rotatably connected to the top of the air outlet hood. The compressed air component delivers compressed air to the inlet to drive the centrifugal component to rotate. The rotating centrifugal component drives the flue gas passing therethrough to rotate, and throws the sticky substances in the flue gas into the receiving groove. By arranging the centrifugal component in the inlet, the continuously rotating centrifugal component throws the sticky substances adsorbed on the surface of the centrifugal component into the receiving groove, and avoids the sticky substances from being adsorbed on the catalyst in large quantities.

The utility model relates to a waste heat recovery system and a boiler system, and the waste heat recovery system comprises a periodic blowdown flash tank which is used for being connected with a boiler; the continuous blowdown flash tank is used for being connected with the boiler, and the continuous blowdown flash tank is connected to the upstream of the fixed blowdown flash tank in an on-off mode; and the first recovery bypass is connected to the downstream of the continuous blowdown flash tank, a heating part is formed on the downstream of the first recovery bypass, and the heating part is used for being in contact with to-be-heated equipment. The first recovery bypass capable of being in contact with the to-be-heated equipment is additionally arranged on the continuous blowdown flash tank, so that heat in waste hot water discharged from the continuous blowdown flash tank is utilized, the purpose of recovering boiler waste heat is achieved, energy waste is reduced, and economic benefits are improved.

The present invention relates to a high-temperature exhaust gas purification and waste heat recovery system, comprising an air preheater, a dust collector, a desulfurization tower, an induced draft fan, and a chimney, sequentially arranged on a boiler exhaust duct. The system also includes a primary waste heat recovery subsystem and a purification system. The primary waste heat recovery subsystem includes a waste heat recovery boiler, a steam turbine generator, and an absorption chiller. The waste heat recovery boiler is arranged between the air preheater and the dust collector, the steam outlet of the waste heat recovery boiler is connected to the steam turbine generator, which is connected to the absorption chiller, and the outlet of the absorption chiller is connected to the water inlet of the waste heat recovery boiler. The purification system includes a purification tower arranged between the desulfurization tower and the induced draft fan. The present invention has the beneficial effects of purifying exhaust gas and effectively recovering and utilizing waste heat from the exhaust gas.

The present invention provides a hydrothermal integrated recovery and purification process for boiler wastewater, which relates to the field of boiler wastewater recovery and purification. The hydrothermal integrated recovery and purification process for boiler wastewater includes the following steps: S1: surface wastewater discharge; S2: periodic wastewater discharge; S3: high-temperature vaporization desalination; S4: three-stage filtration; and S5: steam utilization. The boiler wastewater is vaporized using the power plant's existing high-temperature steam source, and crystallization is carried out using the different solubilities of various salts in water and steam. Impurities and salts dissolved in the wastewater are crystallized into solids and then enter a high-temperature desalination purification device. Through three-stage filtration and adsorption, the system desalination rate is above 90%, ensuring that the steam quality meets the requirements. Furthermore, by performing high-temperature desalination and purification on the wastewater, 100% of the heat and medium of the boiler high-temperature wastewater are recovered and converted into high-quality steam for use, achieving the dual benefits of energy conservation and saving desalted water.

The utility model discloses a boiler flue waste heat recovery device in the technical field of flue gas waste heat recovery, the boiler flue waste heat recovery device comprises a supporting frame, a recovery box, a boiler, a first recovery assembly and a second recovery assembly, the recovery box is connected to the top end of the supporting frame, the top end of the recovery box communicates with a chimney, the boiler is connected to the bottom end of the supporting frame through a flue, and the first recovery assembly communicates with the second recovery assembly; the first recycling assembly and the second recycling assembly are detachably connected into the recycling box and used for recycling smoke heat in the boiler.

A method for recovering cellulose from a cellulose containing textile raw material containing dyed textiles, the method comprising subjecting a disintegrated textile raw material to an oxidative pretreatment before alkaline cooking and any further processing of the cellulose pulp obtained after the alkaline cooking. After cooking, spent alkaline cooking solution containing dye and dye residues is withdrawn from the textile derived cellulose pulp and is transferred to a recovery boiler in a Kraft pulp mill. An apparatus for carrying out the method is also disclosed.

The utility model relates to the technical field of boilers, in particular to a pure hydrogen corner tube type steam hot water boiler which comprises a boiler barrel and a combustion assembly, and the combustion assembly comprises a hydrogen combustor, a water pipe, a superheater, an energy saver, a condenser and an inert gas blowing-in component. A steam drum is installed in the boiler barrel, a water pipe is connected with the steam drum in the boiler barrel, and the water pipe is annularly arranged in the boiler barrel, so that the heat exchange area with high-temperature smoke in a hearth is increased, the heat transfer efficiency is improved, water can rapidly and fully absorb heat and convert the heat into steam or hot water, and the superheater can accurately control the superheating temperature of the steam. The energy-saving device efficiently recovers waste heat of flue gas at the tail of the boiler and is used for preheating feed water, hydrogen is combusted through the hydrogen combustor to supply heat to the boiler, and a proper amount of nitrogen is blown into the boiler barrel through the inert gas blowing component before the device is started. And explosion caused by mixing of introduced hydrogen with air during combustion is prevented.