146 results about "Air preheater" patented technology

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

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

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

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 a gradual coal-fired pulverized coal boiler pipeline connecting system and method, and belongs to the technical field of coal-fired boilers, and the gradual coal-fired pulverized coal boiler pipeline connecting system is sequentially provided with a first branch, a second branch and a third branch; a primary fan is arranged at the head end of the first branch, the air outlet end of the primary fan is divided into two side paths, one side path is communicated with a coal mill through an air preheater, the other side path is communicated with the coal mill through a cold air adjusting valve, the air outlet end of the coal mill is connected with a pulverized coal burner through a primary air pipe, and the pulverized coal burner is arranged at the bottom of the boiler; a secondary air fan is arranged at the end of the second branch, the air outlet end of the secondary air fan is communicated with an air preheater, the air outlet end of the air preheater is connected with a plurality of fourth branches through secondary air pipes, the fourth branches are arranged at intervals in the height direction of the boiler, and a more uniform and longer combustion zone is formed and can be regulated and controlled through a regulating valve; the air outlet end of the boiler is connected with an air preheater through a third branch, and the air outlet end of the air preheater is connected with a chimney.

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 belongs to the energy recovery and utilization technical field of food processing industry relates to a kind of edible oil processing steam-water mixed state material waste heat recovery and utilization system, including waste water tank, steam-water separator, steam-water mixed heat exchanger, condensate heat exchanger, air preheater, softened water tank, hot water storage tank and air blower;Steam-water separator is equipped with steam-water mixing inlet, first steam outlet and condensate outlet, first steam outlet, steam-water mixed heat exchanger and softened water tank are sequentially connected;Condensate outlet, the hot fluid passage of condensate heat exchanger, the hot fluid passage of air preheater and waste water tank are sequentially connected, the inlet of the cold fluid passage of air preheater is equipped with air blower, and the outlet of the cold fluid passage of air preheater is connected with boiler equipment by pipeline;Condensate heat exchanger is connected with hot water storage tank.The utility model can recover latent heat of flash vapor and sensible heat of condensate synchronously, and recover heat generated in edible oil processing process.

The application relates to the technical field of air preheater tube boxes, and discloses a transfer device for an air preheater tube box, which comprises a frame body and a bearing plate, the frame body comprises a plurality of fixed beams which are spaced apart along a first direction, the fixed beams extend along a second direction, a plurality of connecting beams are spaced apart along the second direction between two adjacent fixed beams, the two ends of the connecting beams are connected with the inner side surfaces of the two adjacent fixed beams respectively, and the bottom surface of the fixed beam is connected with supporting feet which extend along a third direction; the bearing plate is laid on the top surface of the fixed beam, and the surface of the bearing plate away from the fixed beam is provided with rolling shafts which are used for assisting the air preheater tube box in being transferred onto the bearing plate. The frame body is formed by connecting the plurality of fixed beams and the plurality of connecting beams, and the bearing plate is laid on the frame body, so that the contact area can be increased, the weight of the air preheater tube box can be evenly distributed, the air preheater tube box can be transferred into a narrow space, and the stability, safety and flexibility of the transfer process are improved.

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 present application relates to the field of solar energy and solid oxide cell technology, and provides a solar multi-generation system based on RSOC and a control method, the system comprising: an RSOC stack module, a photovoltaic device, a first molten salt system and a second molten salt system; the RSOC stack module is in power generation mode SOFC and electrolytic hydrogen production mode PV-SOEC-PTC respectively; high-temperature oxygen-enriched air at the outlet of the RSOC stack module heats air in an air preheater after passing through a combustor, so as to realize heat energy recycling; during operation, high-temperature molten salt in the high-temperature molten salt tank of the second molten salt system enters the RSOC stack module to release heat, so as to maintain the stable working temperature of the stack; the heat-exchanged molten salt is transported to the low-temperature molten salt tank for storage, and at the same time, the first molten salt system is synchronously operated to complete the preheating of water. The high-temperature and low-temperature molten salt tanks of the second molten salt system realize bidirectional heat storage temperature control, and cooperate with the solar molten salt preheating of the first molten salt system, so as to realize efficient switching and stable and controllable temperature of SOFC power generation and SOEC electrolysis modes.

This invention provides a combined unblocking structure for a tubular air preheater, belonging to the field of air preheater technology. It includes an air preheater body and an unblocking mechanism. The unblocking mechanism includes a movable base, an air inlet frame, and multiple jet frames. The top of each jet frame communicates with the air inlet frame, and the jet frames are slidably installed within the movable base. Multiple jet holes are provided on both sides of each jet frame. A horizontal shaft and a vertical shaft are rotatably installed within the air inlet frame, and a helical blade is fixedly sleeved on the outer side of the vertical shaft. Traveling mechanisms are provided on both sides of the movable base, and an air inlet mechanism is provided on the top of the air inlet frame. Linkage mechanisms are provided on both sides of the air inlet frame. This invention, through the coordinated operation of the traveling mechanism and a dynamic torque sensor, achieves precise positioning of the unblocking mechanism and real-time monitoring of the blockage degree, effectively improving the targeting and efficiency of unblocking.

This invention discloses a method for refined control of the cold end temperature of an air preheater in a thermal power plant boiler. During unit operation, when the sulfur content of the coal fed into the boiler flue gas flues, the real-time variation range of SO2 concentration in the flue gas generated by boiler combustion is divided into interval steps. The acid dew point temperature at the corresponding concentration is calculated. Through improved logic module configuration, the acid dew point temperature value corresponding to the upper limit of the SO2 concentration variation range is sent to the boiler air heater control system. This value is used as the control target value for the cold end temperature of the air preheater. The air heater control system automatically tracks and adjusts to ensure that the cold end temperature of the air preheater is never lower than the acid dew point temperature. This prevents sulfuric acid condensation in the flue gas from corroding and clogging the cold end of the air preheater when the flue gas temperature is below the acid dew point temperature, ensuring safe equipment operation, improving the economic efficiency of equipment operation, and further reducing coal consumption.

The application discloses a kind of carbon high temperature denitration device, including burner, smelting furnace, biological carbon generation system, combustion-supporting air heating system, reduction chamber, flue gas waste heat utilization system and air induction system;The burner is installed in smelting furnace;The biological carbon generation system includes a shell, the shell and smelting furnace are communicated;The combustion-supporting air heating system includes air blower, air preheater;Combustion-supporting air provided by air blower is first passed through air preheater, absorbs the heat of flue gas in air preheater, then is sent to the burner again;The air induction system includes air induction machine, to be discharged after the flue gas in reduction chamber is introduced into dust removal system, another part is introduced into burner by circulating pipeline.The present denitration device does not affect the combustion and heating process of original furnace, does not need to consume additional energy, and can utilize the carbonization of renewable energy such as biomass to achieve the removal of NOx, to reduce the emission concentration of nitrogen oxides from the source.

This invention provides a waste heat recovery system and method for high-temperature steel billets based on phase change heat storage. A downcomer is arranged on the outer wall of the cooling chamber, with its first end connected to the boiler drum and its second end connected to a water collection tank. The inner cavity of the water-cooled wall is connected to both the boiler drum and the water collection tank. A heat-conducting oil radiant heat exchanger connected to a medium-temperature phase change heat storage device is arranged in the upper part of the cooling chamber. A flue connected to the cooling chamber is arranged above the steel billet inlet / outlet channel of the cooling chamber. A hot water tube bundle, a feedwater preheater, an air preheater, and an air filter are arranged sequentially within the flue. The outlet of the air preheater is connected to the air duct of the cooling chamber via a pipeline. A cold water source is connected to the feedwater preheater. The outlet of the feedwater preheater is connected to the inlet of the hot water tube bundle. The outlet of the hot water tube bundle is connected to the boiler drum. The outlet of the air filter is connected to a grain drying tower via an induced draft fan. This invention realizes the reuse of waste heat from high-temperature steel billets.

The utility model discloses a tool for simultaneously cutting a plurality of pipes, and relates to the field of air pre-heater pipe machining of boiler manufacturing units. The pipe cutting device solves the problems that an existing pipe cutting mode is low in efficiency, a large amount of manpower and time cost is consumed, and it is difficult to guarantee that the cutting position precision of each pipe is consistent. The left ends and the right ends of two front main frame channel steel are connected with the left ends and the right ends of two rear main frame channel steel through two pairs of limiting side plates respectively, a vertically-arranged positioning back plate is arranged on the rear sides of the two limiting side plates close to one side of the rear main frame channel steel, a pipe clamping device is installed on the upper front main frame channel steel, and a pressing block is located under the front main frame channel steel. The pressing block is connected with the upper front main frame channel steel through a pressing block adjusting mechanism, and the left side and the right side of the lower front main frame channel steel are connected with the left side and the right side of the lower rear main frame channel steel through sliding devices. The pipe cutting device is used for improving the pipe cutting efficiency and precision and meets the cutting requirements of pipes with different lengths.

The utility model relates to a boiler air preheater technical field discloses a kind of high-efficiency heat recovery type boiler air preheater. To solve the technical problem of the heat exchange efficiency of conventional air preheater in prior art is lower, especially when handling high-temperature flue gas, heat recovery is not sufficient. The boiler of the utility model includes hearth for fuel combustion to generate high-temperature flue gas, the outlet of hearth is sequentially provided with superheater, economizer and at least one air preheater along flue gas flow direction;Steam inlet end of superheater is connected with steam drum outlet, superheater outlet end is connected with superheated steam output pipeline, steam drum lower part is connected with hearth water-cooled wall, inlet of steam drum is connected with economizer, economizer feedwater inlet is communicated with water source, air preheater is located in downstream flue gas passage of economizer, air inlet of air preheater is connected with air supply fan. The utility model significantly increases heat exchange area and fluid residence time by wide channel design and S-shaped flow path, improves heat exchange efficiency.

This invention relates to the field of circulating fluidized bed boiler technology, specifically to a low-resistance structure and control method for a boiler primary air duct. It is applied to the air duct between the air preheater outlet and the circulating fluidized bed boiler. The air duct consists of an upper air duct and a lower air duct connected together. A flow sensor is installed inside the upper air duct. Both the upper and lower air ducts include rectangular bends. Inside each rectangular bend, at least one fixed arc-shaped guide plate and multiple movable arc-shaped deflector plates are installed. One end of each arc-shaped guide plate is connected to a rotating shaft. A drive mechanism is installed outside the air duct, and a fine-tuning device is installed at the end of the rotating shaft. Based on the pressure and flow rate obtained from the flow sensor within the air duct, the target spacing of the arc-shaped guide plates is determined. A control command is generated and sent to the drive mechanism to adjust the arc-shaped guide plates to the target spacing. The fine-tuning device then performs small-amplitude reciprocating adjustments to the arc-shaped guide plates, maintaining optimal fluidization and minimal air duct resistance, thus avoiding energy loss due to excessive flow.

This invention provides a zero-discharge system and process for desulfurization wastewater, including a drying tower. The top of the drying tower is equipped with a flue gas distributor and a rotary atomizer, while the bottom side of the drying tower has a flue gas outlet. A cyclone dust collector and a variable frequency booster fan are installed on the connecting flue of the flue gas outlet. The outlet of the variable frequency booster fan is connected to the outlet flue of the power plant's air preheater. This system achieves both efficient contact evaporation of desulfurization wastewater with high-temperature flue gas through the drying tower and, by adding a variable frequency booster fan at the drying tower outlet, eliminates the system's dependence on the air preheater's operating pressure difference. The booster fan actively pressurizes the flue gas, ensuring that the flue gas can overcome system resistance and smoothly enter the air preheater outlet flue. This effectively solves the problem of insufficient air preheater pressure difference causing system malfunction during low-load boiler operation. The booster fan uses variable frequency control, adapting to full-load boiler operation.

The application discloses a kind of thermal power plant rotary air preheater comprehensive health evaluation method and system, determine multiple characteristic parameters, and based on the weight coefficient and deviation degree of each characteristic parameter, comprehensive calculation is carried out, the one-sidedness caused by the evaluation of only single parameter is avoided, and the evaluation result can more truly reflect the overall operation condition of equipment, the deviation degree range of each characteristic parameter used for air preheater comprehensive health evaluation is given in calculation, and the evaluation result of different degrees of influence on comprehensive health index is obtained in later period, the method provides definite maintenance basis for field operation, and ensures the stable operation of thermal power plant rotary air preheater.

The application discloses a dust remover entrance flue gas parameter leveling system based on combination of a smoke cooler and a warm air heater, which branches the air preheater outlet flue into two or more than two dust remover entrance branch flues along the width direction; at least in the dust remover entrance branch flue with the highest temperature, a smoke cooler, a first flue gas temperature measuring point and a first flue gas flow measuring point are simultaneously installed, the first flue gas temperature measuring point is arranged downstream of the smoke cooler; in the rest of the dust remover entrance branch flues, a flue gas resistance balance adjusting door, a second flue gas temperature measuring point and a second flue gas flow measuring point are simultaneously installed; each dust remover entrance branch flue is connected to the dust remover entrance; based on the feedback values of the first flue gas flow measuring point and the second flue gas flow measuring point and the feedback values of the first flue gas temperature measuring point and the second flue gas temperature measuring point, the opening degree of each flue gas resistance balance door and the liquid water flow in the smoke cooler are adjusted, so that the flow and the temperature in each dust remover entrance branch flue are basically consistent. The application is simple and practical.

This utility model discloses a flue gas connection device for thermal power plants, including a base plate. Boilers are fixedly connected to the top of the base plate at both the front and rear. The boiler's flue gas outlet is connected to a denitrification device, the denitrification device's flue gas outlet is connected to an air preheater, the air preheater's flue gas outlet is connected to a dust collector, and the dust collector's flue gas outlet is connected to an induced draft fan. An absorption tower is installed outside the induced draft fan. This utility model relates to the field of flue gas connection technology for thermal power plants. Through the cooperation between a first flue, a first electric valve, and a second flue, when one absorption tower malfunctions or when the flue gas from two boilers can be absorbed by one absorption tower, simply opening the first electric valve allows the flue gas to be transferred through one first flue, the second flue, and a connecting flue to the interior of another first flue, and finally to the interior of the absorption tower. This avoids the situation where, when one absorption tower malfunctions, the flue gas from the boiler on the side of the malfunctioning absorption tower cannot be discharged.

A power source mounting structure, comprising a first flange (3), a second flange (4), an electric motor (2), a magnetic coupling inner ring (5), a magnetic coupling outer ring (6) and a base (7), wherein the first flange is mounted outside a housing (11) of an output apparatus, one of the first flange and the second flange is provided with a positioning hole, the axial direction of the positioning hole is consistent with the axial direction of an input shaft (12) of the output apparatus, and the other of the first flange and the second flange is slidably fitted in the positioning hole; the electric motor comprises a connection bracket (21), the connection bracket is connected to the second flange, the axial direction of a rotary shaft of the electric motor is consistent with the axial direction of the positioning hole, one of the magnetic coupling inner ring and the magnetic coupling outer ring is coaxially connected to the input shaft of the output apparatus, and the other of the magnetic coupling inner ring and the magnetic coupling outer ring is coaxially connected to the rotary shaft; and the base is connected to the housing, and the second flange is slidably connected to the base in the axial direction of the rotary shaft. The power source mounting structure has the advantages of high efficiency in terms of maintenance and replacement of the electric motor. Further provided is an air preheater speed reducer having the power source mounting structure.

The utility model belongs to the technical field of thermal power equipment, and relates to a high-efficiency combined preheater system of a thermal power plant boiler, which comprises a tubular air preheater arranged at the tail part of the boiler and used for heating primary air and a rotary air preheater used for heating secondary air, flue gas inlets of the tubular air preheater and the rotary air preheater are connected with a flue outlet of the denitration system, flue gas outlets of the tubular air preheater and the rotary air preheater are connected with the dust remover, and a water supply heat exchanger is further arranged between the flue gas inlet of the tubular air preheater and the flue outlet of the denitration system. The rotary preheater can further improve the operation efficiency of a coal power plant, solves the problems of high air leakage, loss and catalyst blockage of a traditional rotary preheater, has the advantages of energy conservation, economy and reliability, and meets the technical requirements of efficient and clean operation of a thermal power plant.

This application provides a low-load stable combustion system for a pulverized coal boiler, comprising a boiler connected in sequence to a high-pressure steam turbine, a heat exchanger, a high-pressure heater, and an economizer installed in the boiler's flue. The gas inlet of the heat exchanger is also connected in sequence to an air preheater and an induced draft fan, and the gas outlet of the heat exchanger is also connected in sequence to a coal mill and a burner installed at the primary air inlet. A steam valve is installed between the high-pressure steam turbine and the heat exchanger. In this application, when the boiler is operating at low load, the device uses a heat exchanger to introduce a portion of the steam extracted from the high-pressure steam turbine as a heating medium to heat the primary air preheated by the air preheater, thereby increasing the primary air inlet temperature and maintaining stable combustion in the furnace under low-load operating conditions. This overcomes the drawbacks caused by unstable combustion in the furnace during low-load boiler operation.

This utility model relates to the field of flexible operation retrofitting technology for thermal power generating units, and discloses a steam-hot-air coupling system for CFB units, including a boiler, a steam-hot-air heat exchanger, and a high-pressure cylinder of a steam turbine. A separator is connected to the right side of the boiler. The separator contains a superheated steam system and a reheated steam system. An economizer is located in the lower middle part of the inner side of the separator, and an air preheater is located at the bottom of the inner side of the separator. In this utility model, high-temperature steam is used to heat the primary and secondary hot air at the outlet of the air preheater, increasing the flame temperature inside the furnace and solving the problems of limited inlet flue gas temperature, poor regulation and control, low precision, and limited space in SNCR (Steam-to-Rotation Filter) systems. It also reduces the amount of main steam entering the high-pressure cylinder and reheated steam entering the intermediate-pressure cylinder, increasing the reheated steam temperature and the main steam temperature. Furthermore, it increases the heat load in the water-cooled wall area, reduces the load during the dry-wet state conversion of the unit, and effectively reduces the unit's coal consumption for power generation.

The present application relates to a flue gas treatment system and a flue gas treatment method using an air preheater with a partitioned self-cleaning function. The air preheater has a heat transfer module, a cold fluid inlet cut-off mechanism, and a partition plate. The partition plate is arranged in the shell cold fluid inlet header tank, which is divided into several shell cold fluid inlet sub-header tanks. Each shell cold fluid inlet sub-header tank is provided with a cold fluid inlet cut-off mechanism. Each cold fluid inlet cut-off mechanism can be independently controlled to open. By independently controlling the cold fluid inlet cut-off mechanism, the self-cleaning function of all heat transfer modules in the air preheater tank can be realized.

The utility model provides a kind of coal pulverizer coal dust initial temperature promotion device, it is related to the technical field of coal-fired unit, including the flue between denitration device and air preheater and the flue gas inlet of coal pulverizer are communicated to the first pipeline leading out between them, high-temperature dust collector and temperature rising fan are sequentially provided on the first pipeline along the flow direction of flue gas;Flue between induced draft fan and chimney and the flue of first pipeline and second pipeline between high-temperature dust collector and temperature rising fan are converged;Valve group is arranged on the first pipeline and second pipeline;Valve group electric signal is connected with temperature control unit, for calculating the drying output demand temperature of coal pulverizer, solve the existing preprocessing easy to return moisture and technical problem of backflow abrasion equipment, reach the technical effect that internal flue gas of system is used to provide heat for coal pulverizer, while saving energy, reducing coal pulverizer explosiveness, improve low load condition boiler combustion state, improve boiler efficiency.

The application discloses a biomass fuel preparation system and a thermal power generating unit, and relates to the technical field of biomass fuel preparation systems. The biomass fuel preparation system is used for the thermal power generating unit, the thermal power generating unit comprises a coal-fired boiler and an air preheater, the air preheater is communicated with a flue gas outlet of the coal-fired boiler through a first pipeline, the biomass fuel preparation system comprises a first branch pipe, a biomass baking and carbonization device and a heat exchanger, one end of the first branch pipe is communicated with the first pipeline; the biomass baking and carbonization device is provided with a containing space, a flue gas inlet of the biomass baking and carbonization device is communicated with the other end of the first branch pipe; the heat exchanger has a first flow path and a second flow path, a flue gas outlet of the biomass baking and carbonization device is communicated with the first flow path, and the second flow path is communicated with an air inlet pipe of the air preheater. According to the biomass fuel preparation system, the waste heat of the flue gas flowing out of the biomass baking and carbonization device can be used to preheat the air entering the air preheater, and the heating effect of the air in the air preheater is better.

The present invention provides a shockwave soot blower using combustible gas. The shockwave soot blower using combustible gas comprises a base and a soot blowing assembly; the soot blowing assembly is connected to the base and is movable along the length direction of the base; the soot blowing assembly comprises an air section, a fuel section, a combustion section, and a soot blowing section; the air section is configured for introducing air and is connected to the fuel section, the fuel section is configured for introducing acetylene and air, and the combustion section is connected to the fuel section so as to receive a mixed gas from the fuel section; the combustion section is provided with an ignition component, the ignition component is configured for igniting the mixed gas in the combustion section; the soot blowing section is connected to the combustion section, at least a portion of the soot blowing section is located within an air preheater, and the soot blowing section is provided with a plurality of nozzles so as to inject the combusted mixed gas into the air preheater by means of the soot blowing section. The shockwave soot blower using combustible gas of the present invention offers the advantages of good cleaning performance and high safety.