847results about "Combustion apparatus" patented technology

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 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.

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 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.

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.

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 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 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.

The invention relates to the technical field of plasma electric flame stoves, in particular to a system for supplying nitrogen through centralized air separation for an electric flame stove and a working method. The system comprises an air compression and pretreatment unit, a pressure swing adsorption separation unit, a nitrogen buffer pressure stabilization unit, a nitrogen distribution conveying pipe network, a user side regulation and control unit and at least one electric flame stove which are sequentially connected in the gas flow direction. According to the invention, through centralized nitrogen generation and pipeline distribution, the problem of large-flow nitrogen supply of dispersed users is solved, and the emission of nitrogen oxides is greatly reduced due to the use of oxygen-free nitrogen by the electric flame stove. According to the system, indoor oxygen supplementation of oxygen-enriched gas and domestic hot water recovery of compressed waste heat are achieved at the same time, and the comprehensive utilization efficiency of resources is improved; by adopting the carbon steel pipe net, the construction cost is reduced, and nitrogen with different purities can be flexibly produced to meet multiple requirements; and real-time matching of nitrogen supply and stove power is realized through intelligent flow control of a user side, and stable and efficient operation is guaranteed.

This invention belongs to the field of peak-shaving technology for thermal power units, specifically a deep peak-shaving method for thermal power units that combines electrolytic hydrogen production with ammonia synthesis and energy storage. It integrates an electrolytic hydrogen production with ammonia synthesis and energy storage system, an energy comprehensive utilization system, and a collaborative control system to form a closed-loop peak-shaving system: during off-peak periods, excess electricity from the thermal power unit is collected; during peak periods, the stored ammonia is used to supplement the unit's energy through coal-ammonia co-firing, while oxygen is utilized for oxygen-enriched combustion to enhance peak-shaving and stable combustion capabilities. The synthesized ammonia can also replace purchased ammonia for flue gas denitrification. Through the collaborative control system, the operation of each link is coordinated, achieving efficient energy conversion and precise control. This invention significantly improves the deep peak-shaving and peak-response capabilities of thermal power units, substantially reduces carbon and pollutant emissions, optimizes energy utilization efficiency, extends equipment lifespan, and provides strong support for the green transformation of coal-fired power and the stable operation of new power systems.

To provide a method for monitoring operation of a gas burner system.SOLUTION: A fuel / air mixture is ignited and a flame 5 is generated by a burner 2 during operation of a gas burner system 1. The temperature of the flame 5 is measured by a flame temperature measurement device 7 cooled actively by impingement of cooling air, and is evaluated by an evaluation device 11. A fuel supply to the burner 2 is interrupted in response to the temperature of the flame 5 dropping below a critical value or having a specific negative gradient. An air-fuel ratio is determined from the temperature of the flame 5. The fuel supply to the burner 2 is interrupted in the event of an anomaly in the air-fuel ratio. The invention further relates to the gas burner system 1.SELECTED DRAWING: Figure 1

A nozzle arrangement for a combustor (12) has at least one nozzle pair (43, 46) comprising a fuel gas nozzle (43) for injecting fuel gas, the fuel gas nozzle having a fuel gas nozzle longitudinal axis (62), and the fuel gas nozzle (43) being connected to a fuel gas distribution device (17); the nozzle pair further comprises a secondary gas nozzle (46) for spraying a secondary gas, the secondary gas nozzle (46) being connected to the secondary gas distribution device (45); wherein the fuel gas nozzle (43) is arranged at least partially inside the secondary gas nozzle (46) in the direction of the fuel gas nozzle longitudinal axis (62); the secondary gas nozzle (46) covers the fuel gas nozzle (43) in the circumferential direction around the fuel gas nozzle longitudinal axis (62).

The object of the present invention is a control method for verifying the presence of the flame in the combustion chamber (41) of a premixed gas burner (1), fed by an air and gas mixture mainly and / or essentially comprising hydrogen H2. The method is based on the use of at least one temperature sensor (6), the values whereof are sent to a control device (8) which uses them to calculate the derivative T′ over time of the temperature T to compare it to suitable feedback thresholds (Tau1, Tau2; Tau3, Tau4) to establish the ignition occurred, the ignition failure or flame extinguishment.

The present invention provides a fuel atomizing nozzle (1) for handling at least two fuels and an atomizing fluid, the fuel atomizing nozzle (1) comprising a solid body (10) having a mainly cylindrical shape around a longitudinal axis (X) defining a first end (11), a second end (12) and a contour surface (16) extending there between connecting the two ends (11, 12), wherein the first end (11) comprises at least one outlet (17), wherein the fuel atomizing nozzle (1) further comprises a fluid compartment (14) being arranged centrally around the longitudinal axis (X) in the solid body (10), at least a first and a second fuel compartment (15a, 15b) being arranged in a radial plane between the fluid compartment (14) and the contour surface (16), the fuel compartments (15a, 15b) having an annular shape, the at least first and second fuel compartments (15a, 15b) being connected to a pre-filling chamber (35) by at least a first and a second fuel channel (25a, 25b), respectively, at least one mixing chamber (40) being arranged between the fluid compartment (14) and the at least one outlet (17), and a fluid channel (24) connecting the at least one mixing chamber (40) and the fluid compartment (14), wherein the pre-filling chamber (35) has an annular shape, and the pre-filling chamber (35) is connected via a pre-filling channel (45) to the at least one mixing chamber (40).

A process for producing a synthesis gas product comprising hydrogen by an endothermic reaction of a feedstock, said process comprising the following steps: - Supplying a first fuel gas comprising at least 20% of ammonia at a first flow rate into a combustion chamber, - Supplying a second fuel gas comprising at least 10% of hydrogen at a second flow rate into the combustion chamber, at least a first portion of one of the fuel gas being delivered separately from the other fuel gas into the combustion chamber, - Supplying an oxidizing gas stream, - Performing a combustion of the supplied first fuel gas and the supplied second fuel gas with the supplied oxidizing gas stream in the combustion chamber to provide heat to the endothermic reaction.

To provide a control method and a control device for a boiler capable of suppressing an air amount of the entire boiler even when using fuel gas of which calorie variation is large and a theoretical air amount changes.SOLUTION: A control method is for a boiler that simultaneously burns a plurality of fuel gases with calories different from each other. The control method for the boiler includes a control step of controlling an air amount to be supplied to each of the fuel gases on the basis of a measurement value of an oxygen concentration in exhaust gas of the boiler and a set value of a predetermined target oxygen concentration. The control step includes a step of increasing the air amount to be supplied to the fuel gas with low calorie when the measurement value is below the set value and reducing the air amount to be supplied to the fuel gas with high calorie when the measurement value exceeds the set value.SELECTED DRAWING: Figure 2

The utility model relates to the technical field of kitchen utensils, and provides a novel furnace end which comprises a furnace end body provided with a combustion cavity, an ignition needle used for igniting liquid fuel and a heating device used for preheating the liquid fuel to promote gasification of the liquid fuel are arranged on the combustion cavity, and the furnace end body is provided with an air inlet device. A plurality of circles of air inlet channels which are arranged at intervals in the circumferential direction and penetrate through the side portion of the combustion cavity are formed in the side portion of the combustion cavity, the input end of the air inlet device communicates with outside air, the output end of the air inlet device communicates with the air inlet channels, and the outside air enters the combustion cavity through the air inlet device and the air inlet channels and forms spiral airflow spirally flowing in the combustion cavity. After being gasified, the liquid fuel is mixed with the spiral air flow, so that the gasified liquid fuel is fully combusted, and the technical problem that carbon black is easily generated in a combustion cavity due to insufficient combustion after the liquid fuel of an existing furnace end is gasified is effectively solved.

A burner device (X) in which air (Air) ejected from an air ejection port (21) and fuel (G) ejected from a fuel ejection nozzle (30) are mixed and burned, the fuel ejection nozzle (30) being provided with a short-flame fuel ejection nozzle (31) and a long-flame fuel ejection nozzle (32), the short-flame fuel ejection nozzle (31) and the long-flame fuel ejection nozzle (32) being disposed in the short-flame fuel ejection nozzle (31), and the long-flame fuel ejection nozzle (32) being disposed between the short-flame fuel ejection nozzle (31) and the long-flame fuel ejection nozzle (32). The short-flame fuel discharge nozzle (31) mixes and burns the fuel at a position close to the air discharged from the air discharge port, and the long-flame fuel discharge nozzle (32) mixes and burns the fuel at a position away from the air discharged from the air discharge port.

The invention relates to a method and an arrangement for increasing the charge carrier concentration near an ionization electrode (5) for controlling a gas-air mixture and / or monitoring flames (4) in a combustion chamber (1) of a heating appliance, to which a mixture (G) of air (L) and a fuel, in particular fuel gas with more than 50% hydrogen content, is supplied through openings (3) in a burner body (2), wherein at least one substance promoting ionization is provided or the proportion of this substance is increased, at least in the vicinity (13) of the ionization electrode (5). The invention makes it possible to use cost-effective ionization measurement systems even when using fuels with low charge carrier concentrations in a heating appliance for monitoring flames (4) and / or for controlling a combustion process.

The utility model discloses a novel burner structure used for improving the utilization rate of a unit boiler aiming at east coal. A boiler combustion system of the unit boiler comprises a coal pulverizing system and a burner. The combustion system forms a direct-blowing pulverizing system in a direct-blowing manner of a medium-speed coal mill; the combustors are arranged on the boiler in a regular four-corner mode. The combustor is divided into five layers of primary air chambers from bottom to top, and the distances between the adjacent primary air chambers are equal. After the structure of the novel combustor is improved, on the premise that 90% of Zhundong coal is combusted, the on-load capacity of a boiler is improved, the boiler has the capacity of being brought to 350 MW or above for a long time, meanwhile, a hearth has the high hearth anti-slagging capacity, and the safety of a heating surface is guaranteed.

The present application provides a mixer and a gas combustion system. The mixer comprises: a venturi (32) having an air inlet (321), a gas inlet (322) and a mixed gas outlet (323), the gas inlet (322) being arranged at a throat (325) of the venturi; an adjusting component (34) arranged in the venturi (32) and downstream of the throat, the adjusting component (34) being capable of being driven to move towards or away from the throat (325) so as to change the flow area of the gas in the venturi (32).

A burner includes a primary input port configured to receive hydrogen-containing fuel and primary oxygen-containing gas. A fuel-distribution element comprises a plurality of distribution openings. A flashback arrestor element comprises a plurality of flashback arrestor element channels with a mean width that is smaller than a critical flame quench diameter of the hydrogen-containing fuel. A burner housing can be provided, and the burner housing, fuel distribution element, and flashback arrestor element can be made of plastic and by 3D printing. A combustion element includes a plurality of combustion element apertures configured to cause the burner to produce a flame and / or infrared heat, wherein a mean width of the combustion element apertures is 2-4 times larger than the mean width of the flashback arrestor element channels. A method of heating and a heating system are also disclosed. The combustion element can also be equipped for resistive heating.

A thermal reactor is described comprising a combustion chamber configured as a tubular cavity defined by coaxial cylindrical surfaces electrically connected, further comprising a plurality of evacuation conduits fluidically connected at the top to the combustion chamber.