222 results about "Biomass boiler" patented technology

The invention discloses an air preheating biomass boiler, belongs to the technical field of boilers, and aims to solve the problems of low combustion efficiency, insufficient flue gas waste heat utilization and particulate matter emission of a traditional biomass boiler. Function optimization is achieved through a main body structure composed of a furnace body, a charging barrel and a rotating pipe, a double-spiral-disc heat exchange assembly is arranged in the charging barrel, biomass fuel is preheated through boiler exhaust smoke waste heat, meanwhile, smoke is discharged through exhaust holes after being distributed through spiral disc gas storage cavities, and unburned particles are filtered by a biomass layer and carried to a hearth to be subjected to secondary combustion; an air inlet cavity is formed in the rotating pipe, and air is preheated through the fixed pipe and the first connecting pipe and then input into the hearth. The exhaust assembly adopts a sliding rod and sealing block matched structure, and a convex block mechanism driven by a rotating pipe drives the sealing block to periodically move, so that gas in the charging barrel is intermittently exhausted through a double-layer filter screen. According to the boiler, the heat efficiency is improved through a smoke-air two-way preheating and particulate matter secondary combustion mechanism, and the biomass preheating, air heating and emission treatment process is optimized.

The invention discloses a multi-fuel mixing proportion intelligent optimization control method for a variable-working-condition biomass boiler, and relates to the technical field of fuel control. Comprising the following steps: collecting industrial analysis data of various coal types, and recording combustion test data of each coal type; training a neural network model; acquiring a preset load and an initialized fuel proportion as original mixed coal, inputting the original mixed coal into the trained model, and acquiring combustion test data of the original mixed coal; calculating a predicted load and a preset deviation; calculating a proportion correction coefficient, and correcting the proportion of each component of the original mixed coal through a correction method. According to the method, the neural network model is trained through multiple fuel components, hidden influences among different components can be reserved, correction is repeated, the fuel proportion is changed as small as possible according to the previous correction result in each correction, historical data are further fitted, the component proportioning habit is continued, the method adapts to the stock of all the components of the fuel, and the fuel efficiency is improved. And emergencies are prevented.

The utility model discloses a biomass gas combustion system capable of accurately controlling combustion. The system comprises a biomass gas burner, a biomass gas pipeline connected with the burner, an air blower, an air supply pipeline connected with the air blower and the burner, a tar collecting device in a hearth of the biomass boiler, an oxygen sensor arranged on a smoke exhaust pipeline of the boiler, a controller based on a PLC (Programmable Logic Controller) system, and an air blower frequency converter. Gas component, flow, temperature and pressure measuring devices are arranged on the biomass gas pipeline, and flow and temperature measuring devices are arranged on the air supply pipeline. The controller calculates the oxygen amount needed by biomass gas combustion and the oxygen amount provided by the air blower according to data fed back by the measuring device, and controls the air blower frequency converter to adjust the air amount of the air blower under correction of data fed back by the oxygen sensor on the boiler smoke exhaust pipeline, so that combustion is accurately controlled under the condition of partial load of the boiler, and the combustion efficiency is improved. The combustion efficiency is improved, and the pollutant emission is reduced.

The invention relates to the technical field of environmental protection, and discloses a biomass boiler oxygen-enriched combustion and biomass fly ash potassium extraction method which comprises the following steps: step 1, high-carbon-dioxide-concentration flue gas generated after biomass is subjected to oxygen-enriched combustion in a boiler is cooled, fly ash is separated, the flue gas enters a flue gas heat exchanger, and low-temperature flue gas and hot air are obtained after heat exchange with cold air; 2, fly ash obtained through separation and water are mixed and stirred, a water-ash mixture is obtained, CO2 is introduced into the water-ash mixture, and the ash mixture and low-temperature flue gas are subjected to a contact reaction; step 3, performing solid-liquid separation on the water-ash mixture after the reaction to obtain a potassium-rich solution A and a filter residue A, dividing the solution A into a solution B and a solution C, returning the solution B to the contact reaction tank for circulation, and enabling the solution C to enter a concentration device; 4, heating and concentrating the solution C through hot air to obtain a solution D; and 5, carrying out solid-liquid separation on the solution D to obtain potassium salt and mother liquor F. The method is simple in process, low in extraction cost and high in product purity.

The application discloses a kind of ammonia-free denitration agent for biomass boiler and its preparation method, and preparation raw materials include, by mass percentage: oxidizing agent 13-18%, solubilizer 0.5-2%, dispersing agent 0.5-1%, absorbent 15-19%, activated carbon slurry 8-15%, and the balance is water.5, the incorporation of denitration agent can effectively reduce the monitored values of nitrogen oxides at the inlet and outlet of flue gas, whether mother liquor or diluted product has the effect of reducing nitrogen oxides, the use method is simple, low in cost, convenient to use, has greater economic value and broad application prospect.

The utility model discloses a boiler cleaning structure, which belongs to the technical field of boilers, and adopts the technical scheme that the boiler cleaning structure comprises a biomass boiler body, the inner side of the biomass boiler body is in bolted connection with a wall scraping structure, the inner side of the biomass boiler body is in inserted connection with a collecting structure, and the bottom of an electric push rod is in bolted connection with the top of the biomass boiler body. The output end of the electric push rod is slidably connected with the inner wall of the biomass boiler body, the bottom of the electric push rod is in bolted connection with the top of the fixing frame, the outer side of the fixing frame is fixedly connected with the inner side of the connecting block, and in the biomass fuel combustion process of an existing biomass boiler, a large amount of impurities such as ash and coke residues can be generated. The impurities are attached to the heating surface of the boiler, so that the heat exchange efficiency of the boiler is reduced, the energy consumption is increased, and the normal operation of the boiler is influenced.

The present application belongs to the technical field of biomass boiler, in particular to a circulating fluidized bed boiler tail flue fly ash conveying system, which comprises a bin pump and a fly ash conveying pipeline, the bin pump is arranged at the bottom of the discharge pipe of the tail flue ash bucket; a flow zone is arranged at the middle part of the discharge pipe, a flow bin is arranged inside the flow zone, and the flow bin is communicated with the bin pump through a mixing pipe arranged at the middle part; the accumulated ash and the airflow are mixed in advance to form a gas-solid mixture which is sent into the bin pump and flows to the ash storage, so that the flowability of the ash is improved, the short-time concentrated release of the ash is converted into the continuous release of the gas-solid mixture, and the load on the bin pump is reduced; and the process of forming the gas-solid mixture from the accumulated ash expands the gap between the cinder, so that the cinder is diffused, the excessive concentration of the cinder through the bin pump is avoided, the blockage of the upper opening or the valve of the bin pump is avoided, the failure rate of the bin pump is reduced, and the smooth transfer of the accumulated ash of the boiler tail flue is ensured.

The utility model is applicable to the technical field of biomass boilers, and discloses a biomass boiler air distribution device which is characterized in that a rotating pipe is vertically and rotatably mounted in the middle of the top of a boiler body through a sealing bearing, support frames are vertically and fixedly mounted on two sides of the top of the boiler body, and a fixed sleeve is fixedly mounted on the surface of the top of each support frame; a conveying pipe is fixedly installed between the inner sides of the two fixing sleeves in a transverse penetrating mode, the top end of the side edge of the conveying pipe fixedly communicates with an air feeding pipe, a driving mechanism is arranged in the conveying pipe, and a transmission mechanism is arranged in the rotating pipe. According to the technical scheme, air can be normally conveyed into the rotating pipe and the exhaust pipe through the connecting straight pipe and the rotating joint, and external air is uniformly conveyed to different positions in the furnace body by combining with the synchronous rotating exhaust groove; and air is conveyed to different positions in the furnace body, so that the contact degree of comburent in the furnace body and oxygen is increased, and the combustion rate of the comburent in the furnace body is increased.

A desulfurization, dust removal and denitration device for a biomass boiler relates to the technical field of flue gas treatment devices and comprises a treatment barrel shell, a plurality of alkali liquor distribution ring shells are fixedly connected to the outer wall of the treatment barrel shell in parallel from top to bottom, and a plurality of alkali liquor outlets communicated with the alkali liquor distribution ring shells are formed in the barrel wall of the treatment barrel shell in the circumferential direction in a surrounding mode and correspond to the alkali liquor distribution ring shells. An atomizing head is fixedly connected in each alkali liquor outlet, a filter screen is fixedly connected to the position, close to the upper end, of the treatment barrel shell, and a cleaning plate set in friction contact with the inner wall of the treatment barrel shell and the lower surface of the filter screen is rotationally arranged in the treatment barrel shell. The utility model solves the problems that dust and particulate matters are contained in flue gas in the prior art, most of the dust in the flue gas is separated after alkali liquor is in contact with the flue gas, and the separated dust and particulate matters are easy to gather in the device, so that the dust removal efficiency of the device on the flue gas is influenced.

The invention discloses a flow and pressure detection system of a biomass boiler. The flow and pressure detection system comprises a fuel information acquisition module, a combustion data monitoring module, a dynamic analysis module, a model construction module and a central control regulation module, the fuel information acquisition module is used for acquiring static biomass fuel information and dynamic biomass fuel information; the combustion data monitoring module is used for monitoring the combustion reaction of biomass fuel in the boiler; the dynamic analysis module is used for analyzing the biomass fuel information and generating biomass fuel frequency conversion data information; the model construction module is used for constructing a biomass boiler flow-pressure parameter linkage model; and the central control adjusting module is used for carrying out real-time detection and dynamic adjustment on flow parameters and pressure parameters of the biomass boiler. By detecting and monitoring the flow and pressure of the biomass boiler, the combustion performance and stability of the biomass boiler are improved, and the use cost is saved.

The utility model relates to the technical field of biomass boilers, and discloses a biomass boiler capable of realizing heating, cooking and kang heating, which comprises a combustion table and a ventilation table, a chimney is fixedly mounted on the ventilation table, and a combustion mechanism is arranged on the combustion table; the upper sealing plate and the lower sealing plate are controlled to add biomass raw materials and treat ash, during combustion, the heat insulation plates are selectively installed on the two sides of the combustion table, heat dissipation can be rapidly controlled, meanwhile, the ash groove is installed between the combustion table and the air exchange table, and the ash groove can guide heat transmission and can also guide heat exchange. By installing a wet vessel and a dry vessel, after a valve is controlled to inject water into the wet vessel, water vapor is generated through heating and enters a room through a temperature control pipe, after the dry vessel is heated, heat enters the room through the temperature control pipe, the indoor temperature and humidity can be flexibly changed, and practicability is high.

The invention belongs to the technical field of biomass boilers, and particularly relates to a water circulation design method for a pipeline support boiler, which comprises the following steps of: firstly, constructing a 3D geometric model of the biomass boiler, simplifying to obtain a simplified model, then defining material attributes and fluid attributes of the simplified model, performing stress simulation analysis by utilizing simulation software, and finally, calculating the water circulation of the pipeline support boiler. Obtaining a constraint lower limit of each pipeline size parameter in the simplified model meeting the structural mechanical property requirement, then forming an adjustment scheme by upwards adjusting each pipeline size parameter based on the constraint lower limit, and substituting the obtained adjustment scheme into the simplified model to obtain the structural mechanical property requirement. And after setting boundary conditions, carrying out finite element analysis by utilizing finite element analysis software to obtain a medium flow analysis result, and finally screening out an adjustment scheme with the most appropriate circulation ratio based on the medium flow analysis result. According to the biomass boiler, the circulation ratio of the biomass boiler can be effectively increased on the premise that the stress stability is guaranteed.

The utility model relates to the technical field of biomass boiler slag coolers, and discloses a blockage clearing device of a biomass boiler slag cooler, which comprises a slag cooler charging barrel end plate, a blockage clearing mechanism is arranged in an inner cavity of the slag cooler charging barrel end plate, the blockage clearing mechanism comprises a flange seat and a flange cover, one side of the flange seat is fixedly provided with a fixing seat, and the other side of the flange seat is fixedly provided with a baffle. A threaded hole is formed in an inner cavity of the flange base, and a positioning ring is fixedly installed on one side of the flange cover. The blockage clearing mechanism is arranged on the original end plate of the material barrel of the slag cooler, the fixed seat is welded in the inner cavity of the end plate of the material barrel of the slag cooler, the flange cover and the flange seat are connected through the connecting bolt, refractory castable has good heat resistance, foreign matters in the slag cooler are manually taken out after the flange cover is detached, and the blockage clearing mechanism is convenient to use. Foreign matters such as iron wires in the slag are prevented from blocking the slag spraying holes, and the feeding system device of the slag cooler does not need to be disassembled, so that a large amount of manpower and time are saved.

The utility model discloses a system for preparing renewable natural gas by utilizing biomass, which comprises a biomass degradation system, a biomass combustion system, a biomass gasification system and a wind and light energy storage electrolysis system, the biomass degradation system comprises an anaerobic fermentation device, a purification device and a biogas storage tank I which are communicated in sequence, the biomass combustion system comprises a biomass boiler, a carbon dioxide trapping device, a methanation device I and a synthetic natural gas storage tank which are sequentially communicated, and the biomass gasification system comprises a gasification furnace, a methanation device II and a biogas storage tank II which are sequentially communicated. The wind and light energy storage electrolysis system comprises a wind power and photovoltaic power generation system and an electrolytic cell which are sequentially communicated. The biomass recycling system has the advantages that recycling treatment of different types of biomass is realized, and meanwhile, efficient development and utilization of biomass energy are also realized.

This application provides a denitrification control method and system for biomass boilers based on cryogenic catalytic reduction, relating to the field of combustion product treatment technology. The method includes: arranging a denitrification reactor in the tail flue of the biomass boiler and monitoring the associated data of the outlet flue gas in real time; performing multi-level control analysis on the boiler denitrification control space and establishing a multi-level denitrification control channel; monitoring the reaction temperature and dynamically identifying zones in the denitrification reactor to determine the cryogenic catalyst reaction zone set; using the multi-level denitrification control channel to perform dynamic strategy analysis on the associated data of the outlet flue gas and the cryogenic catalyst reaction zone set; monitoring the denitrification execution of the denitrification reactor based on the target boiler denitrification control parameters, and performing dynamic compensation control through flue gas denitrification feedback data. This application can solve the technical problem of unstable denitrification control efficiency in existing biomass boiler technologies, achieving the technical effect of improving the stability of denitrification control efficiency.

The utility model discloses a straw sugar making system coupled with a biomass power plant. The straw sugar making system comprises a straw sugar making subsystem and a straw sugar making subsystem, wherein the straw sugar making subsystem comprises a bundling device, and a bundle breaking device, a first-stage iron removal device, a primary sorting device, a second-stage iron removal device, a secondary sorting device, a third-stage iron removal device, a crushing device, a third sorting device, a drying device, a crushing device, a powder tank device, a catalytic saccharification device, a solid-liquid separation device and a sugar liquid concentration device which are sequentially connected; the biomass power plant subsystem comprises a stock ground, a biomass boiler, a steam turbine and a generator which are connected in sequence; a discharging port of the bundling device is connected with a feeding port of the stock yard, and a discharging port of the stock yard is connected with a feeding port of the bundle breaking device. A heat source inlet of the drying device is connected with a biomass boiler heat outlet; a steam inlet of the catalytic saccharification and liquid glucose concentration device is connected with a steam outlet of the turbine; a generator electricity outlet is connected with an electricity inlet of the straw sugar manufacturing subsystem. The system can make full use of mature fuel collection and storage systems, infrastructures, green heat, green electricity and the like of the biomass power plant, the investment and operation cost of the straw sugar making system is reduced, and the survivability of the power plant is improved.

The utility model discloses a biomass boiler fan inlet baffle structure which comprises a fan body, an air inlet cylinder, a protective net, a fan plate and an adjusting fan plate, supporting legs are welded to the two sides of the bottom end of the fan body, a motor is fixed to the interior of the fan body through a support, fan blades are welded to the motor, and the fan blades are fixed to the fan body through a support. The front end of the fan body is welded and fixed to the air inlet barrel through a connecting strip, and a fan plate is fixed to the front end in the air inlet barrel. The adjusting fan plate is arranged on the rear side of the fan plate in the air inlet barrel, the area of the adjusting fan plate is larger than that of the air inlet, the rubber strip is arranged on the front end face of the adjusting fan plate, when the hydraulic cylinder controls the adjusting fan plate to be connected with the fan plate, the sealing effect can be achieved through the rubber strip, and when the air inlet size is adjusted, only the hydraulic cylinder needs to be controlled, and the operation is convenient. And the operation is simple, the air inlet amount can be adjusted through the backward movement of the adjusting fan plate, the air inlet track is uniform, and the adjusting fan plate is convenient to replace and overhaul.

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.

This utility model discloses a biomass boiler ash removal device with anti-clogging function, comprising: a conveying pipe, one end of which is connected to the boiler, a first pipe extending upwards from the other end of the conveying pipe, and a second pipe extending downwards from the other end of the conveying pipe; and an ash removal structure disposed inside the conveying pipe, which scrapes away the accumulated soot inside the conveying pipe. This utility model can effectively and promptly remove soot, prevent clogging, ensure normal boiler operation, improve boiler efficiency, and reduce the frequency of downtime maintenance.

The utility model discloses a water-cooling vibration grate biomass boiler with a flue gas recirculation device, which comprises a hearth, a coal spreading air pipe is arranged on the front side of the hearth, a plurality of primary air chambers are arranged on the lower portion of the hearth, and the primary air chambers respectively comprise a primary air chamber for preheating, a primary air chamber for burning and a primary air chamber for burnout. A flue gas recirculation device is arranged in front of the coal spreading air pipe and the primary air chambers, and an adjusting valve is installed on the flue gas recirculation device and used for adjusting the inlet flow of tail flue gas. The utility model provides a flue gas recirculation technology for a water-cooling vibration grate biomass boiler, which can effectively reduce the generation of original NOx, is more sufficient in preheating and better in combustion effect, prevents fuel at the lower part of a feed port from being combusted in advance, and prolongs the service life of a grate flexible pipe. And the method has relatively high social use value and application prospect.

This invention relates to the field of denitrification catalyst technology, and in particular to an arsenic- and alkali-poisoning-resistant denitrification catalyst and its preparation method. The denitrification catalyst comprises: a support, an active component, and a co-catalyst; the mass ratio of the active component to the support is (3-15):100; the mass ratio of the co-catalyst to the support is (3-8):100; the support comprises: calcium-based bentonite, attapulgite, and nano-cerium oxide; the active component is an oxide of vanadium, chromium, samarium, or niobium; and the co-catalyst is one or more oxides of molybdenum, tungsten, or praseodymium. This invention prepares a multi-component mesoporous composite oxide denitrification catalyst with excellent resistance to arsenic and alkali metal poisoning through multiple steps, solving the problem of poor arsenic and alkali resistance in traditional denitrification catalysts. It is suitable for nitrogen oxide emission control under flue gas conditions in coal-fired power plants, biomass boilers, and the glass industry.

The utility model is suitable for wastewater treatment technical field provides a kind of biomass boiler wastewater treatment equipment, it includes: collection pond and fixed axle, fixed axle is fixedly arranged at the top of collection pond, slidingly equipped with moving seat on collection pond, rotatingly equipped with threaded shaft on moving seat, lifting seat is equipped above moving seat, rotatingly equipped with several rotating shaft sleeves on lifting seat, the bottom of rotating shaft sleeve is equipped with several stirring parts, several support shafts are fixedly arranged on moving seat;Matching sleeve, it is rotatably connected in moving seat, gear is all equipped on matching sleeve, sliding magnet is slidingly equipped on lifting seat, double-sided rack is equipped on sliding magnet, fixed magnet is all equipped on the lifting seat of the both sides of sliding magnet, guide rod is equipped on sliding magnet, the both sides of sliding magnet are equipped with the stirring part. By this, the utility model can realize the zero discharge treatment of wastewater, reduce investment cost, and the wastewater in collection pond can be fully stirred, to avoid its precipitation and condensation, ensure good wastewater treatment effect.

In the patent application document I have described a coordination mechanism of two pistons within a cylinder that allows a thermodynamic process such as expansion to be carried out. The pistons are moved by separate mechanisms that transform the continuous rotation of motor or generator shafts into irregular rectilinear motion. The objective of this invention is its use in power production facilities where efficient compression or expansion of gas or vapors is required. The applications can be: Expansion of steam produced in a biomass boiler. Expansion of steam produced with some energy source, primarily renewable. Compression and expansion of air in an external biomass combustion plant and compressed air-exhaust gas heat exchanger. Vapor-gas expansion produced by the combustion of ethanol and oxygen.

The invention relates to the technical field of gas recovery and emission reduction, and discloses a biomass-fired boiler gas recovery and emission reduction device which comprises a coal economizer, a butt joint pipe is fixedly connected to the top of the coal economizer, a mounting ring is fixedly connected into the butt joint pipe, and a plurality of annularly and evenly distributed guide plates are fixedly connected into the mounting ring. The inner wall of the butt joint pipe is fixedly connected with a fixed annular plate, the fixed annular plate is located below the flow guide plate, the inner wall of the fixed annular plate is fixedly connected with a plurality of evenly-distributed mounting frames, a plurality of evenly-distributed blocking rods are fixedly connected into the mounting frames, and a plurality of shallow grooves are formed in the surfaces of the blocking rods. The problem that when large-size particles move at a high speed, impact force on the inner wall of the economizer is large, and consequently abrasion to the inner wall of the economizer is large can be optimized, the service life of the economizer is prolonged to a certain degree, and due to the fact that the service life of the economizer is longer, the gas recovery and emission reduction efficiency of the economizer can be improved to a certain degree.

The utility model discloses a biomass boiler flue gas denitration device inlet temperature adjusting system which comprises a second flue, a third flue and a fourth flue which are sequentially connected with an outlet of a hearth and are vertically arranged, an inlet of the second flue is connected with the outlet of the hearth, the second flue is communicated with the lower end of the third flue, and the fourth flue is communicated with the outlet of the hearth. The upper end of the third flue is connected with the upper end of the fourth flue through a furnace top turning flue, a temperature adjusting heat exchanger capable of reducing the temperature of flue gas, an evaporator and / or a superheater are sequentially arranged in the third flue, and a denitration device and a tail heating surface are arranged in the fourth flue. A dust remover is arranged in the furnace top turning flue, and a bypass flue capable of increasing the smoke temperature is arranged between the top of the hearth and the dust remover front flue. The boiler DCS system controls the opening degree of the regulating valve or the opening degree of the flue gas baffle according to the temperature, measured by the thermocouple, of the flue gas entering the denitration device, so that the temperature of the flue gas entering the denitration device can be regulated and controlled, and the denitration device is always in the optimal denitration temperature interval.

This invention relates to the field of heat energy recovery technology, specifically disclosing a biomass boiler slag heat recovery device, including a receiving unit, a conveying structure, and a heat exchange structure. The conveying structure is fixedly installed on the receiving unit, and the heat exchange structure is fixedly installed on the conveying structure and located above the receiving unit. This invention achieves full and efficient waste heat recovery, realizing multi-level utilization of heat energy. The heat exchange structure has a simple design, is easy to process and assemble, and operates stably, achieving environmentally friendly operation. It takes into account both waste heat recovery and dust control, centrally collects slag residue, maintains a clean working environment, and facilitates subsequent processing. The heat energy utilization method is practical and adaptable to actual industrial heat demand. The structure has strong synergy, and the overall equipment is compact with high space utilization.

The present application relates to the technical fields of biomass boiler, especially to a biomass boiler feeding device, which comprises a shell including a containing part and a feeding hopper arranged on the containing part; an output mechanism including a driving member arranged on the containing part and a movable coupling arranged on the output end of the driving member, the driving member being connected with a barrel through the movable coupling; a limiting mechanism arranged on the movable coupling; the surface of the barrel is uniformly provided with through holes, and the barrel is provided with an extrusion knife; the biomass garbage is dried by using the heat of the boiler, and the biomass garbage is crushed by the rotation of the barrel and the extrusion knife, so that the size of the biomass fuel particles is more uniform; since the biomass garbage falling from the extrusion is uniformly dropped, the generation of the phenomena of insufficient combustion, coking and ash accumulation caused by the moisture content, material accumulation and uneven particles can be avoided.

The utility model discloses denitration and dust removal integrated equipment for a biomass boiler, which belongs to the technical field of waste gas treatment of the biomass boiler and comprises a base, a vertical plate is fixedly mounted on the upper surface of the base, a treatment box is fixedly mounted at the top end of the vertical plate, and a plurality of branch conveying pipes are mounted on the treatment box in a penetrating manner. A plurality of spray heads are fixedly mounted on the outer surfaces of the branch conveying pipes; the treatment box body is matched with the filter screen, the denitration agent input pipe and the gas input pipe for use, a denitration agent input by the denitration agent input pipe is conveyed to the spray heads through the main conveying pipe and the branch conveying pipes to be sprayed out, waste gas is conveyed through the gas input pipe and then is sprayed out through the gas outlet pipe, and dust particles in gas are filtered out through the filter screen firstly; the denitration and dust removal are integrally carried out, the operation efficiency is effectively improved, peculiar smell and wet moisture can be effectively removed when the gas subjected to denitration and dust removal is discharged through the activated carbon adsorption net and the drying agent net plate, and a good environment is guaranteed.

The present application belongs to the technical field of surface engineering, and provides a protective material for boiler pipes, a preparation method thereof, and a protective method for boiler pipes. The protective material for boiler pipes comprises the following components in mass fraction: Al: 6-20 wt.%; Cr: 18-24 wt.%; Mo: 5-7 wt.%; Co: 1-5 wt.%; Si: 0.5-1 wt.%; Zr: 1-3 wt.%; and Ni: the balance. The protective coating obtained by laser cladding of the protective material for boiler pipes is not easy to fall off from the base body, has good heat conduction performance and strong thermal shock resistance, can be used in working conditions of high-temperature chlorine corrosion or high-temperature chlorine corrosion-erosion synergistic effect, and can also be applied to corrosion protection in working conditions of high-temperature coexistence of alkali metal chlorides and sulfates; and can be applied to, but is not limited to, biomass boilers, waste incineration boilers and biomass circulating fluidized bed boilers.

An air distribution system of a biomass boiler comprises a draught fan and an air pipe which are arranged outside the biomass boiler, secondary air inlets are formed in the two opposite sides of the biomass boiler, air distribution units corresponding to the secondary air inlets are arranged in the biomass boiler, the air distribution units are communicated with the draught fan through the air pipe, and the end, close to the air distribution units, of the air pipe is a bent pipe section. The air distribution unit comprises an air distributor, an air distribution plate arranged in the air distributor and an air guide connecting plate, the air distributor is installed on the inner wall of the biomass boiler in the horizontal direction, the air distribution plate is arranged in the middle of the air distributor in the horizontal direction, and an air blowing hole set is formed in the side, away from the inner wall of the biomass boiler, of the air distributor. The fan conveys gas for sufficient combustion of fuel to the air distributor of the air distribution unit, the joint of the air distributor and the air pipe is of a bent pipe section structure, and compared with a right-angle pipe, the bent pipe section can relieve impact of air generated by the fan on the joint of the air pipe and the air distributor, so that air flow is smoother, and turbulent flow and pressure drop are reduced.