1200results about "Combustion apparatus" patented technology

A wood pellet patio heater having a rocket stove with a replaceable cartridge, secondary air control, and a heat reflector is described. The rocket stove having the replaceable cartridge of the wood pellet patio heater provides increased efficiency (i.e. less consumption of fuel over time). The secondary air control of the wood pellet patio heater facilitates combustion, and thus provides temperature control, where temperature control will require varying amounts of air depending on the quality of the fuel source. The heat dome provides increased heat profile.

To efficiently recover carbon dioxide from exhaust gas generated through incineration while suppressing energy consumption.SOLUTION: A waste incineration system includes: an incinerator for burning waste while conveying the waste in the combustion chamber with a fire grate; dust removal means for removing dust from exhaust gas discharged from the incinerator; mixed gas supply means for supplying mixed gas obtained by mixing gas containing oxygen and part of exhaust gas from which dust has been removed by the dust removal means to the combustion chamber; cleaning means for cleaning the exhaust gas from which dust has been removed by the dust removal means; and liquefaction means for directly liquefying carbon dioxide included in the exhaust gas cleaned by the cleaning means without interposing a device for separation and recovery.SELECTED DRAWING: Figure 1

The invention discloses a flue gas compensation type pulverized coal wide-load stable combustion system based on staged combustion and intelligent regulation and control and a control method, and belongs to the technical field of coal-fired power generation. The system is composed of a combustor, an intelligent control module and a flue gas backflow module, the combustor adopts a double-ring fuel channel design, an inner ring injects high-concentration pulverized coal and is provided with an adjustable swirler, and pulverized coal-flue gas mixed airflow is introduced into an outer ring; the intelligent control module predicts a load through an LSTM neural network, and realizes accurate matching of air and coal in combination with PID adjustment; and the flue gas backflow module adopts an oxygen concentration adjustable technology to maintain the combustion intensity. Under the working condition of 30%-40% low load, the system achieves the stable combustion effect that the flame center temperature is stabilized at 920 + / -20 DEG C by means of optimizing the proportion of inner ring pulverized coal to 75%-85%, increasing the primary air temperature to 145-170 DEG C, compressing the proportion of secondary air to 20%-30%, strengthening a swirling flow field to 45 degrees and the like in cooperation with flue gas backflow with the oxygen concentration of 23%-25%, and has the advantages of efficient combustion and low emission.

The invention relates to the technical field of plasma generator protection, and discloses a plasma generator protection device which comprises a plasma generator provided with a mounting seat and a spray gun extending into a combustion chamber; the sleeve sleeves the spray gun and is used for replacing the spray gun to bear the scouring of primary air pulverized coal airflow in the combustion chamber; the powder slag cleaning part comprises a scraping plate, the length direction of the scraping plate is consistent with the length direction of the spray gun, and the scraping plate is attached to the periphery of the sleeve; the scraping plate is driven by an annular driving mechanism to rotate along the circumferential track of the outer surface of the sleeve, the movement path of the scraping plate is tightly attached to the outer circumferential face of the sleeve, and the rotation axis of the scraping plate coincides with the geometric axis of the sleeve, so that powder slag generated after hot melting of the surface of the sleeve is removed. Pulverized coal airflow scouring is blocked through the sleeve, powder slag is cleaned in combination with the annular driving scraper, the heat dissipation performance of the spray gun is guaranteed, the service life of the spray gun is remarkably prolonged, the maintenance cost is reduced, and the operation stability and economical efficiency of equipment are improved.

A system (100) for roasting coffee particles is described, comprising: a combustion chamber (1) capable of heating air; a rotating drum (3) for roasting coffee particles; a first connecting duct (4) between the combustion chamber (1) and the rotating drum (3) for allowing hot air to travel from the combustion chamber (1) to the rotating drum (3) along a feed direction (V); a decanting cyclone separator (8) connected to the rotating drum (3) by a second duct (9) to receive a hot air flow mixed with air and / or solid impurities from the rotating drum (3) and formed during roasting; the system (100) also includes a tubular body (10) having two channels (11, 12) positioned on the first connecting duct (4) between the combustion chamber (1) and the rotating drum (3); the tubular body (10) is equipped with a first valve (13) and a second valve (14) to change the temperature of the mixed air flow entering the rotating drum (3).

To provide a burner and an ammonia mixed combustion boiler capable of promoting combustion of ammonia and reducing generation of unburned ammonia.SOLUTION: A burner 10 includes: a first fuel flow passage L1 for supplying first fuel F1 of which combustion speed is higher than that of ammonia; a first air flow passage L2 for supplying first combustion air A1; an ammonia flow passage L3 for supplying ammonia F2; a second air flow passage L4 for supplying second combustion air A2; a first fuel ejection part 15 that ejects the first fuel F1; a first air ejection part 16 that ejects the first combustion air A1; an ammonia ejection part 17 that ejects the ammonia F2; and a second air ejection part 18 that ejects the second combustion air A2. The first fuel ejection part 15 is disposed upstream of the ammonia ejection part 17, and burns at least part of the first fuel F1 in a space surrounded by the ammonia flow passage L3.SELECTED DRAWING: Figure 1

The invention provides a deep peak regulation method for a coal-fired unit, relates to the technical field of thermal power generation, and can solve the problem of low-load flame shift, stabilize the combustion core and inhibit the fluctuation of NOx emission concentration by dynamically regulating and controlling a combustion field in a boiler. The energy storage system and the boiler are configured for cooperative operation, the energy storage system is used for rapidly transferring / releasing heat energy, the limitation of the heat storage rate of the boiler is broken through, the two-way peak regulation capacity and the regulation speed of the coal-fired unit in the load reducing stage and the load increasing stage can be remarkably improved, and therefore the boiler efficiency is improved under the low load, and the station service power consumption rate is reduced. By constructing an intelligent control system in communication connection with the DCS, automatic control can be realized.

The invention relates to a chemical looping combustion variable load system based on flue gas recirculation and a control method. The system comprises a chemical looping combustion system and a flue gas recirculation system (7), the chemical looping combustion system comprises an air reactor (1), a fuel reactor (2), an AR cyclone separator (3), an FR cyclone separator (4), an AR material return device (5), an FR material return device (6), an air supply system (8) and a fuel supply system (9). By controlling the flow and temperature of recirculated flue gas of the flue gas recirculating system and cooperatively controlling the opening degree of the conical valve and the circulating flux of the system, the load of the chemical looping combustion system is flexibly adjusted, the energy consumption is reduced, the efficiency is improved, and the operation cost is reduced; and the rest high-temperature flue gas enters a flue gas treatment system to be treated, high-purity CO2 gas is obtained after heat exchange, condensation and purification, and finally efficient combustion of fuel and low-energy-consumption carbon capture are achieved.

The present invention relates to the technical field of flue gas heat recovery. Particularly disclosed is a flue gas heat recycling structure for a combustion furnace, comprising: a flue dust filtering part, which comprises a flue dust pipe and a dust removal box connected to one end of the flue dust pipe, a filter screen mechanism used for filtering flue dust being mounted in the dust removal box; a flue gas high-temperature recycling part, comprising a water tank, a heat exchange assembly using the temperature of flue gas to heat a water source being mounted in the water tank; and an anti-acid dew part, mounted on the flue gas high-temperature recycling part and used for raising the temperature of flue gas and maintaining the temperature of outlet water. The flue dust filtering part of the present invention effectively cleans a filter screen in real time, so as to ensure the flue gas permeability of the filter screen, thus eliminating the need for manual cleaning and reducing maintenance costs. Meanwhile, cleaning actions are driven by the gas flow of flue gas, thus eliminating the need for extra energy consumption and achieving better practical effects. The anti-acid dew part uses part of high-temperature flue gas to raise the temperature of low-temperature flue gas, such that the discharge temperature thereof is higher than the condensation temperature of acid mist, thus avoiding generation of acid dew, and reducing damages to apparatuses caused by acid dew.

Device for drying material for an asphalt mixing plant, the device (2, 3) comprising a rotary kiln (9) which can be driven to rotate about a rotational axis (19) and in which the material is dried, the rotary kiln (9) having a material inlet (10) and a material outlet (11), b. a heating unit coupled to the rotary kiln (9) for supplying heat to the rotary kiln (9), the heating unit being designed with a burner (12) having i. a burner housing (27) having a longitudinal axis (26), ii. an air line (16) arranged on the burner housing (27) for supplying air, wherein the air line (16) is arranged axially to the longitudinal axis (26) on the burner housing (27), iii. an air blower (29) arranged in the air line (16, 28), iv. a burner head (41) arranged on the burner housing (27) for generating a burner flame (13), v. a hydrogen gas line (14) connected to the burner (12) for supplying hydrogen gas into the burner (12), wherein a hydrogen gas nozzle (31) for discharging the hydrogen gas is connected to the hydrogen gas line (14), characterized in that c. the burner (12) is designed to be operated either exclusively by means of hydrogen gas or by means of hydrogen gas and secondary fuel, d. the burner (12) has a swirling element (35) for swirling the air in the burner (12) relative to the longitudinal axis (26), e. the swirling element (35) comprises a flow guide element in the burner housing (27), wherein the flow guide element is arranged immovably in the burner housing (27), f. the flow guide element is arranged concentrically to the longitudinal axis (26) and is designed as a baffle plate having a plurality of blades (53, 54) arranged in a circle with respect to the longitudinal axis (26) and oriented at an inclination, g. the heating unit comprises a hot gas generator (24) connected to the burner (12) which is connected to the rotary kiln (9) by means of a hot gas line (25).

The present disclosure relates to a burner control system, comprising a controller, a burner connectable to a combustible gas supply and comprising a controllable valve coupled to the controller, an optical sensor arranged at the burner and coupled to the controller, wherein the controller is configured to determine a use state of the burner, from a group of use states comprising at least an ignition state, based on a measurement signal of the optical sensor that is indicative for a light level corresponding to said use state, and to selectively control the controllable valve in dependency of said use state of the burner.

The invention discloses an adjusting method and device for reducing high-temperature corrosion of a water cooling wall of an opposed firing boiler, and the method comprises the steps: testing the sulfur content of coal as fired, and controlling the sulfur content of the coal as fired; the opening degree or the rotating speed and the ventilation quantity of a baffle of a separator of the coal mill are adjusted, and the primary air speed, the pulverized coal fineness and the uniformity index value of each layer of combustor are adjusted to be within the required range; the boiler operation oxygen amount, the opening degree of a secondary air box and the opening degree of an over-fire air door are adjusted, and the excess air coefficient of a main combustor area is controlled; the opening degree of internal and external secondary air and the rotational flow strength of a main combustor of the boiler are adjusted, a secondary air door in the combustor is fully opened, the rotational flow angle of the internal secondary air is adjusted to be minimum, the rotational flow angle of the external secondary air of the combustor close to two side walls is adjusted to be smaller, and meanwhile the external secondary air volume is increased. After adjustment, pulverized coal airflow deflection wall-attaching combustion is relieved, air supply in the initial stage of combustion is increased, H2S generation is reduced, and meanwhile the air supply amount of a flowing dead zone of the opposed firing boiler and the isolation capacity of a wall-attaching air film on pulverized coal airflow deflection wall-attaching are also increased.

The invention relates to a variable-power scale-free boiler and topology heat transfer quasi-super Stirling ecological heat engine technology, in particular to a working principle of direct-current scale-free super heat exchange high power density reaching 8-16 times fuel oil stress application variable power in the ZL2012105664497.4 patent achievement innovation field of the inventor, and the working principle is applied to normal low pressure, middle high pressure, critical pressure, high pressure, high pressure, high pressure, high pressure, high pressure, high pressure, high pressure, high pressure, high pressure, high pressure, high pressure, high pressure, high pressure, high pressure, high pressure, high pressure, high pressure, high pressure, high pressure, high pressure, high pressure, high pressure and high pressure. Various types of boilers are free of scale obstruction, super in heat exchange, high in power density, ultra-low in cost rate, and safe in multi-module unit combination of less than 30-90L; a boiler heat exchange heat output'boiler 'system formed by connecting ten to hundreds of congruent module (tube panel) units in parallel is integrally matched with a magnesium catalysis water-based combustion-supporting combustion science'boiler' system of a '8-16 times fuel oil stress application 'Stirling'heat engine', and meanwhile, a new era of human cosmic rock planet carbon dioxide and carbon rock particle energy ecological metallurgy is created. The invention relates to a Stirling ecological heat engine, in particular to a variable-power scale-free multi-module once-through boiler and a topology heat transfer Stirling ecological heat engine, wherein the variable-power scale-free multi-module once-through boiler and the topology heat transfer Stirling ecological heat engine are used for gathering metamorphosis heat radiation and a three-guide interlining heat transfer and exchange body heat output system under the constraint of extreme-effect

The invention discloses a device and method for denitrification by co-combustion of microwave-activated coke. The device includes a coal feeding hopper and a furnace. Coal is input onto a chain grate, and the coal cinder after combustion enters an ash hopper. The flue gas flows out through the outlet flue of the chain grate. The tail of the outlet flue of the chain grate is connected to the outlet flue of a dust collector, and a dust collector is arranged on the outlet flue of the dust collector. The tail of the outlet flue of the dust collector is respectively connected to a draft fan and a flue gas recirculation flue. Part of the flue gas flows out through the draft fan, and the other part of the flue gas enters the flue gas recirculation flue. A feeder on the flue gas recirculation flue inputs coke into the flue. The coke is mixed with the flue gas and then enters a microwave generator. The reacted coke is sprayed into the furnace through a coke spray gun. The ability of coke to reduce nitrogen oxides is improved by the microwave activation effect, and then the reacted coke is sprayed into the high-temperature and low-oxygen space in the furnace. While the coke is cyclically burned out, nitrogen oxides are also removed, and no secondary pollution to the environment will be caused.

The invention provides a pulverized coal temperature nuclear fusion composite glow flame burner, and relates to the field of cement production. The burner comprises: a metal elbow; the thermonuclear fusion excitation assembly comprises a metal shell, a metal electrode, an insulating connecting piece and an electrode tip; an opening is formed in the portion, located in the metal bent pipe, of the metal shell. The metal electrode is arranged in the metal shell and is connected with the metal shell through the insulating connecting piece; the metal shell is provided with a conveying pipe communicated with an inner cavity of the metal shell, a conveying channel is arranged in the metal electrode, one end of the conveying channel penetrates through the outer side wall of the first end of the metal electrode to form an air outlet, the electrode tip is arranged at the air outlet, and the electrode tip is provided with a flow guide through hole communicated with the conveying channel. The conveying channel communicates with an air supply valve set. By actively constructing the plasma field, the combustion stability in the starting stage, the low-load working condition or the kiln condition fluctuation can be remarkably improved, meanwhile, nuclear energy gain is fully utilized to achieve energy conservation and consumption reduction, and the problems of insufficient combustion and flameout are effectively avoided.

A burner including a first pulverized coal entrained fluid flow conduit; an inner hydrogen conduit; and a hydrogen oxidant conduit positioned between the first pulverized coal entrained fluid flow conduit and the inner hydrogen conduit; an outlet of the inner hydrogen conduit positioned a first distance from an outlet of the hydrogen oxidant conduit such that hydrogen output from the outlet of the inner hydrogen conduit passes through a portion of the hydrogen oxidant conduit to the outlet of the hydrogen oxidant conduit; and the outlet of the hydrogen oxidant conduit being a second distance from an outlet of the first pulverized coal entrained fluid flow conduit such that the hydrogen and the hydrogen oxidant output from the outlet of the hydrogen oxidant conduit passes through a portion of the first pulverized coal entrained fluid flow conduit for being output from the burner.

A fuel-fired burner includes a combustion air inlet for receiving combustion air coupled to a combustion air nozzle at an input to a second chamber within a burner housing spaced apart from a third chamber within the second chamber. The combustion air nozzle directs the combustion air into the third chamber. A fuel inlet coupled to a burner nozzle secured to a burner mounting plate has a recycle port for receiving hot exhaust gas provided to an exhaust gas path. A jet pump located entirely inside the burner housing is configured to receive the hot exhaust gas from the exhaust gas path. The jet pump operates by flowing the combustion air through the combustion air nozzle which suctions in the hot exhaust gas through the recycle port into the exhaust gas path then into a gas mixing zone for mixing the hot exhaust gas and the combustion air.

The invention provides a coal-fired boiler deep peak regulation hydrogen doping stable combustion system and method, the coal-fired boiler deep peak regulation hydrogen doping stable combustion system comprises a coal-fired boiler and a hydrogen burner, and the hydrogen burner is arranged in the middle area of a hearth above a pulverized coal burner and used for injecting hydrogen into a preset area of the hearth. By providing the hydrogen burner with the adjustable nozzle angle and adjusting the jet flow angle of the nozzle of the hydrogen burner in the hearth in real time according to the internal combustion state of the hearth, the combustion distribution of hydrogen in the hearth is optimized, and therefore hydrogen-doped stable combustion and carbon reduction are achieved under the low-load operation working condition of the coal-fired boiler. And meanwhile, the potential local high temperature condition after hydrogen doping is avoided, and the technical effect of improving the hydrogen blending combustion energy utilization efficiency and the use safety under the deep peak regulation scene of the coal-fired boiler is achieved.

Provided are systems and methods for transport vehicles using recyclable metallic fuels. The method includes capturing fuel products, including a metal oxide and unburnt fuel from the combustion of a metallic fuel, storing the unburnt metallic fuel and the fuel products, and recycling the metal oxide to recreate the metallic fuel and / or byproducts. Heat generated by the combustion and / or sintering of the metallic fuel may be transferred to a working fluid to drive the production of electricity and / or to provide propulsion in land, air and water vehicles and spacecraft. Furthermore, the thermal energy harvesting system may be used to generate electricity. The system includes a thermal (heat) engine having an induction heating assembly for heating the metallic fuel. Processes for complete combustion of the metallic fuel and recycling the metallic fuel in a sintering loop are described.

The present application relates to solid waste treatment technical field, especially a reciprocating mechanical grate furnace and grate jam determination processing method, real-time collection of the motion parameters of the reciprocating grate; based on the above motion parameters, in the automatic mode operation process, the grate jam determination module determines whether the sliding grate of each stage occurs jam failure; if it is determined that the jam failure occurs, the system switches to the automatic emergency processing mode operation, and the grate jam automatic emergency processing module automatically handles the jam failure; when the factors of the jam failure disappear, the motion mode of the sliding grate of this stage is switched to the automatic mode, and the grate jam flag is automatically reset; the reciprocating grate jam is determined, and appropriate automatic emergency processing is made, the influence of mechanical jam caused by metal parts, bricks and stones and the like on the stable and continuous operation of the reciprocating grate furnace is reduced, and the comprehensive benefits of general industrial solid waste treatment plants are improved.

A furnace 1 includes: a first burner group 10 including at least one first burner 11, the at least one first burner 11 injecting a first fuel F1 containing ammonia into a combustion space S and combusting the first fuel F1 at a first air ratio; and a second burner group 20 including at least one second burner 21, the at least one second burner 21 injecting a second fuel F2 containing a fossil fuel into the combustion space S and combusting the second fuel F2 at a second air ratio higher than the first air ratio.

The invention discloses a multi-angle micro-pipe staged combustion rotational flow gas burner, and relates to the technical field of industrial burners and low-nitrogen combustion. According to the low-nitrogen combustor, the problem that the combustion stability and the nitrogen oxide emission control level are difficult to optimize at the same time due to the fact that an existing low-nitrogen combustor cannot achieve fuel uniform distribution on the microscale is solved. The device comprises an on-duty flame system, a main flame system, an air supply channel and a flue gas recirculation structure, the on-duty flame system realizes multi-angle uniform injection of fuel through a multi-angle fuel distribution device to form stable central on-duty flame; the main flame system realizes fuel grading through an inner and outer ring mixing pipe; the flue gas recirculation structure introduces backflow flue gas into the combustion area through the flaring of the mixing pipe and the entrainment opening of the arc-shaped air sleeve, the backflow flue gas is mixed with air or fuel gas, and the combustion temperature and the oxygen concentration are effectively reduced. Through the synergistic effect of staged combustion and flue gas recirculation, the effects of stable combustion, uniform flame and low NOx emission are achieved.

The invention relates to the technical field of boiler combustion control, in particular to a through-flow boiler ultra-low nitrogen combustion control system based on multistage flue gas recirculation. Comprising a flue gas grading circulation unit; the low-nitrogen combustion regulation and control unit is used for realizing staged mixed combustion of fuel and circulating flue gas, and a staged combustion structure is matched with an air-fuel ratio dynamic regulation technology; the working condition parameter sensing unit is used for acquiring boiler combustion and flue gas state parameters in real time, integrating a multi-source sensor module and constructing a multi-dimensional operation parameter set; and the intelligent cooperative control unit is used for coordinating dynamic control of the ultra-low nitrogen combustion process. High-temperature and low-temperature independent flue gas circulation branches are arranged through the flue gas staged circulation unit, and a staged combustion structure of a main combustion section and a re-combustion section of the low-nitrogen combustion regulation and control unit is combined, so that the problem of non-uniform distribution of a hearth temperature field caused by compact combustion space and dramatic change of a flow field of the through-flow boiler can be solved; therefore, the generation of thermal nitrogen oxides is inhibited.

The invention discloses a biomass double-hearth combustion furnace with a direct-flow burner and a rotational-flow burner arranged at the bottom, and relates to the technical field of combustion equipment. The problems that an existing combustion device is insufficient in adaptability to the particle size of biomass particles, and large-particle biomass is difficult to burn out completely are solved. A direct-current burner is connected with the outer wall of an inner-layer furnace and the inner wall of an outer-layer furnace through a posture adjusting assembly, a turbulent burner and an inner-layer furnace combustion chamber which are embedded inside and outside are installed at the bottom of the inner-layer furnace, a through turbulent burner is installed at the bottom of the inner-layer furnace combustion chamber, and a third smoke exhaust channel is formed in the upper portion of the inner-layer furnace. An outlet of a first smoke exhaust channel in the upper portion of the outer-layer furnace is communicated with a third smoke exhaust channel, an outlet of a second smoke exhaust channel is communicated with an inlet of a cyclone separator, an outlet in the upper end of the cyclone separator is communicated with an inlet of a turbulent burner through a combustible gas connecting pipeline, and an outlet in the lower end of the cyclone separator is communicated with a combustion chamber of the inner-layer furnace through a carbon residue channel. The biomass burner is used for achieving sufficient burning of large-particle biomass, and the burn-off rate is increased.

The invention belongs to the technical field of clean combustion, and particularly relates to a pulverized coal dense-thin separation and ammonia gas jet flow large-angle reverse blowing direct-current burner and a combustion system, and the direct-current burner comprises an ammonia gas channel, a burner channel and a pulverized coal dense-thin separator; the pulverized coal dense-thin separator is arranged in the combustor channel; the output end of the combustor channel is a thick-thin primary air nozzle, and a separator is arranged in the middle of the thick-thin primary air nozzle; an included angle is formed between the axis of the concentrated-phase primary air back-blowing nozzle and the axis of the combustor channel; the ammonia gas channel is arranged on the side edge of the combustor channel and is arranged close to one side of the concentrated-phase primary air back-blowing nozzle; the output end of the ammonia gas channel is an ammonia gas back-blowing nozzle which forms an included angle with the axis of the combustor channel; the included angle between the ammonia gas back-blowing nozzle and the axis of the combustor channel is larger than the included angle between the axis of the concentrated-phase primary air back-blowing nozzle and the axis of the combustor channel. Compared with the prior art, the problem that a large amount of NOx is easily generated during ammonia-doped combustion of pulverized coal is solved. According to the scheme, ammonia combustion is converted into hydrogen combustion, and high combustion efficiency and environmental protection performance are both considered.

The invention provides a high-temperature heat storage method and system of a coupling peak regulation boiler. The method comprises the steps that hot flue gas of the peak shaving boiler and a low-temperature solid particle heat storage material are mixed and subjected to heat exchange, and a high-temperature solid particle heat storage material is obtained; the high-temperature solid particle heat storage material is stored in a heat preservation mode; the high-temperature solid particle heat storage material exchanges heat with water or water vapor to generate high-temperature steam, and at least part of the high-temperature steam is used for power generation; carrying out mixed heat exchange on the high-temperature solid particle heat storage material and gas to obtain high-temperature flue gas; and at least part of the high-temperature flue gas is sent back into the peak regulation boiler. The technical scheme can be widely applied to the technical field of boiler peak regulation.

The invention relates to the technical field of flue gas purification and recovery, in particular to an ultralow emission system and method for chemical looping combustion flue gas. The system comprises a fuel reactor, a flue gas outlet of the fuel reactor is connected with an inlet of a cyclone separator, and a first nitrogen oxide removal unit and a second nitrogen oxide removal unit are sequentially arranged on an outlet flue of the cyclone separator; the outlet flue is sequentially connected with the dust removal unit, the desulfurization unit and the recycling unit, and part of flue gas treated by the dust removal unit is used for diluting a denitration reducing agent in the second nitrogen oxide removal unit and / or returns to the fuel reactor for cyclic utilization; and part of recycled flue gas treated by the recycling unit is at least used for atomization of a denitration reducing agent in the first nitrogen oxide removal unit, and / or returns to the chemical looping coal feeding system. According to the system and the method, a whole-process treatment link of denitration, dust removal, desulfurization and carbon dioxide capture and recovery of the chemical looping combustion flue gas is constructed, corresponding pollutants are accurately removed by each unit, and the flue gas is recycled.

The invention relates to the technical field of direct-current combustors. The direct-current burner comprises a nozzle body arranged at the corresponding corner of a boiler hearth, a spray head arranged at an air outlet of the nozzle body and a blade window separation mechanism, an elbow is arranged in the middle of the nozzle body, primary inertial concentration is carried out when pulverized coal airflow passes through, and the concentration a of the fire-facing side is improved; the blade window separation mechanism is arranged in the spray head, and secondary adjustable concentration is carried out when pulverized coal airflow passes through the blade window separation mechanism. When the boiler is in a low-load operation state, the elbow can enable coarse particle pulverized coal with the particle size larger than 50 micrometers to be enriched in a wall-attached mode, high-concentration wall-attached flow with the thickness larger than or equal to 50 mm is formed, and the concentration is 80%-100% higher than that of main flow; the stable combustion of the boiler in a rated load range of 15%-100% can be realized through the adjustment of the control piece; and when the load is low (less than or equal to 30% of rated load), the smoke temperature at the outlet of the hearth is increased by 30-50 DEG C, the ignition condition is improved, the smoke temperature at the inlet of the SCR denitration system is maintained to be more than or equal to 300 DEG C, and the NOx emission concentration is controlled to be below 50mg / m.

The application discloses a low-NOx ammonia fuel combustion system based on plasma combustion support X The generated staged ammonia gas combustion system comprises a high-frequency high-voltage power supply, a dielectric barrier plasma generator, a gas distribution system (a blower and an ammonia storage tank), a combustion chamber and a swirler; the dielectric barrier plasma generator comprises a high-voltage electrode, an insulating medium, a swirler and a ground electrode; and the gas distribution system comprises a blower and an ammonia storage tank. The application utilizes dielectric barrier to generate ammonia gas plasma discharge, reduces the difficulty of ammonia gas combustion and improves the stability of ammonia gas combustion; utilizes the swirler to generate rotating airflow and improves the combustion efficiency; utilizes ammonia gas staged combustion to further reduce NOx emission; and the ideal staged ratio is that the volume ratio of ammonia gas plasma to side wall ammonia gas is 20% (10%-30%), so that the ammonia gas plasma can be fully discharged, and the ammonia sprayed from the side wall can also be fully combusted.

The present application relates to the technical field of grain drying, and particularly relates to a combustion chamber convenient to transport and assemble. The combustion chamber comprises a burner, a horizontally placed outer cylinder, a base welded at the bottom of the outer cylinder, an equal-length inner cylinder coaxially fixed in the inner part of the outer cylinder, a connecting rod arranged between the outer periphery of the outer cylinder and the inner cylinder, a screen mesh arranged at one end of the outer cylinder, an end plate arranged at one end of the inner cylinder and outside the screen mesh, a nozzle of the burner penetrating through the end plate and the screen mesh and extending into the inner cylinder, and a heat preservation pipeline connected to the other end of the outer cylinder. The base, the inner cylinder and the outer cylinder are prefabricated in a split manner, which not only saves materials compared with traditional combustion chambers, but also is convenient to transport. The assembled combustion chamber saves time and labor, and the manual construction time is short, which can ensure the construction period. The combustion medium in the inner cylinder is provided with a heat source by the burner, hot air is output through the heat preservation pipeline, the refractory layer prevents the damage of high temperature to the inner wall of the combustion chamber, the cold air door adjusts the supply temperature, and the air tunnel cools the nozzle of the burner located in the inner part of the end plate.