35results about How to "Lower flame temperature" patented technology

The invention discloses a safe airtight cold-resistant low-smoke flame-retardant control cable used in an explosion environment, and relates to the technical field of cables, a first hot melting pipe is filled with expanded graphite, the outer side of a wrapping tape is uniformly sleeved with protective iron rings at intervals, the outer sides of the protective iron rings are uniformly provided with fixing holes at intervals, and a communication port is formed between every two adjacent fixing holes; according to the invention, the heat insulation cotton, the compression-resistant rib, the protection iron ring, the arc-shaped elastic sheet, the arc-shaped frame and the elastic roll absorb and buffer external force, so that the compression resistance and impact resistance of the cable are enhanced; the aluminum hydroxide powder absorbs a large amount of heat and delays combustion, the expanded graphite in the first hot melting pipe is heated to expand, the expanded graphite is diffused to a gap between the shielding layer and the wrapping layer, flame is prevented from combusting to the interior of the cable, the working time is prolonged, and the economic loss is reduced.

The invention discloses a flame retardant with a double-layer microcapsule structure, a flame-retardant polyurethane material as well as a preparation method and application of the flame-retardant polyurethane material, and belongs to the technical field of flame retardants. The material is a multifunctional flame retardant with a double-layer core-shell structure, a shell layer is calixarene boric acid resin, a middle shell layer is melamine phthalic anhydride resin, and a core layer is hydroxyapatite modified aluminum hypophosphite. Due to the high cross-linking degree between polymers, the flame retardance of polyurethane is improved, meanwhile, the mechanical property of the polyurethane is improved, and the flame retardance and seawater corrosion resistance of the material are synergistically enhanced through hydroxyapatite dispersed in the core layer. The double-shell layer has excellent hydrophobicity, prevents internal aluminum hypophosphite from being affected with damp and has anti-fouling and self-cleaning effects, and the prepared flame-retardant polyurethane composite material has excellent tensile and flexible characteristics due to a double network of hydrogen bonds and covalent bonds.

The invention discloses a low-nitrogen oxide burner structure which comprises an air inlet barrel, an air barrel, a fire gathering cover, a flame stabilizing barrel, a gas main pipe and a gas ejector with an ejection pipe. The air inlet barrel, the air barrel, the fire gathering cover and the flame stabilizing barrel are sequentially in butt joint and communicated to be used for conveying air, the gas main pipe is arranged in the air barrel, and the gas main pipe is branched into a plurality of gas branch pipes. A center air pipe is arranged in the center of the flame stabilizing barrel, a plurality of blades are arranged in the flame stabilizing barrel around the center air pipe, and gaps between the adjacent blades form outer air through grooves. The gas branch pipes extend into inlets of the injection pipes in a one-to-one correspondence mode with gaps, and the injection pipes are arranged around the flame stabilizing barrel by a circle. A two-stage air conveying channel is formed by the central air pipe and the outer air through groove, and a fuel gas input channel is formed by the injection pipe. The mixing uniformity of air and fuel gas is enhanced, graded conveying of the fuel gas and the air is achieved, combustion flames are stable, flue gas can flow back for combustion, and meanwhile generation of nitric oxide is reduced.

This utility model discloses a tunnel fire-fighting foam liquid filling system, belonging to the field of fire-fighting equipment technology. It includes several fire boxes, a foam liquid filling vehicle, and a monitoring center. Both the fire boxes and the foam liquid filling vehicle are networked with the monitoring center to achieve data exchange. Specifically, each fire box contains a foam liquid storage tank and a first control device. The foam liquid storage tank is equipped with a first liquid level sensor, a solenoid valve, a variable frequency delivery pump, and a first flow meter. A flow regulating valve and a second flow meter are installed on the pressure water pipe. All components are connected to the first control device. The foam liquid filling vehicle contains a foam liquid storage tank, a variable frequency high-pressure pump, a battery, a third flow meter, and a second control device. Both the first and second control devices are connected to the monitoring center. This utility model provides a highly efficient, intelligent, and easy-to-maintain tunnel fire-fighting foam liquid filling system.

The invention discloses a low-nitrogen burner and combustion method for producing hydrogen by high-temperature cracking of methanol. The burner comprises a combustion main cylinder, wherein a mixed gas chamber is connected with a combustion chamber; combustion-supporting air is passed through the mixed gas chamber; an expansion chamber is arranged in the mixed gas chamber, and the expansion chamber is connected with a vacuum generator exhaust port through a pipeline, and the vacuum generator air supply port is connected with a compressed combustion-supporting air supply source, and the negative pressure port of the vacuum generator is arranged at the flue gas outlet position; a plurality of U-shaped tubes are arranged in the methanol atomization annular chamber, and a methanol balancer is arranged at the left ends of the plurality of U-shaped tubes; a plurality of methanol high-temperature cracking tubes and a combustible gas annular tube are arranged in the combustion chamber; an atomizing methanol nozzle and an ignition device are arranged in the combustion chamber, and the atomizing methanol nozzle and the methanol balancer are connected with a methanol storage device through a transmission pipe. A low-nitrogen burner and combustion method for producing hydrogen by high-temperature cracking of methanol provided by the invention can reduce the generation of nitrogen oxides.

The present invention discloses a low-nitrogen burner and a low-nitrogen burner control system for intelligently adjusting the air-fuel ratio. The low-nitrogen burner comprises: a peripheral air pipe, a main gas pipe air inlet seat and the main gas pipeline, a plurality of axial gas branch pipes, a plurality of oblique gas branch pipes and a flame stabilizing disk arranged inside the peripheral air pipe; the roots of the plurality of axial gas branch pipes are connected to the main gas pipeline, and the ends are connected to the flame stabilizing disk, and have axial injection ports arranged on the flame stabilizing disk; the roots of the plurality of oblique gas branch pipes are connected to the main gas pipeline, and the ends surround the outer edge of the flame stabilizing disk and are provided with oblique injection ports; the flame stabilizing disk is provided with a central air hole and a plurality of air swirl holes uniformly distributed in the circumferential direction; the ends of the peripheral air pipe are provided with a flame hood contraction port and a plurality of triangular guide vanes. The technical solution of the present invention helps to efficiently organize combustion and reduce pollutant emissions by strengthening the mixing of air and gas and forming a graded flame through graded combustion.

The present invention proposes a high-temperature pyrolysis and multi-oxygen incineration treatment process and system for medical waste. The process freezes and crushes the medical waste, and then screens it. During the screening, inorganic substances are separated and discharged after sterilization; the remaining organic substances are reverse-burned and gasified for multi-oxygen incineration; the generated gasification gas is firstly used for waste heat utilization, and the low-pressure steam generated by the waste heat utilization is used for medical institutions, and the low-temperature flue gas generated is used for reflux to adjust the oxygen-rich concentration of reverse-burning gasification and multi-oxygen incineration; the solid products of reverse-burning gasification and multi-oxygen incineration are treated with ash; the oxygen during reverse-burning gasification and multi-oxygen incineration is supplied by the surplus oxygen in the liquid oxygen production link. The process system of the present invention has the characteristics of distributed miniaturization, rapid start and stop, and can be used at any time, and can be shut down at any time. It also rationally utilizes the surplus cold in the hospital's own liquid oxygen gasification, rationally utilizes energy, solves the oxygen demand for multi-oxygen incineration, and forms a comprehensive medical institution waste distributed comprehensive utilization system.

The present invention discloses a low-pollution burner head structure, comprising: a main gas pipe, an air guide pipe, a flame stabilizing disk, a long fuel injection rod, a short fuel injection rod and a central air chamber; the long fuel injection rod and the short fuel injection rod are connected to the end of the main gas pipe, arranged alternately in the circumferential direction, and radial fuel holes are provided at the ends; the main gas pipe is also provided with a backward injection rod and a radial injection hole; the central air chamber is arranged inside the main gas pipe, and the end of the air guide pipe penetrates into the main gas pipe and is connected to the central air chamber; the front end of the central air chamber is provided with an oblique injection rod, and the end is provided with a head axial cooling hole; the flame stabilizing disk is sleeved at the end of the main gas pipe and is located upstream of the long fuel injection rod and the short fuel injection rod, and the flame stabilizing disk is provided with a swirl blade, a transition flare and a spoiler. The low-pollution burner head structure of the present invention can better organize combustion and control pollutant emissions.

The utility model relates to a heat accumulating type combustion system. The heat accumulating type combustion system comprises a heating furnace, a fuel conveying pipeline, a combustion improver conveying pipeline and a flue gas conveying pipeline, the heating furnace is provided with a plurality of nozzles, each nozzle is provided with a heat accumulator, and the heat accumulators are used for storing heat of flue gas sprayed out of the corresponding nozzles; when the temperature of flue gas sprayed out of the corresponding nozzle is lower than the preset temperature after heat storage of the corresponding heat storage body, the flue gas conveying pipeline conveys the flue gas after heat storage to other nozzles, the fuel conveying pipeline conveys fuel to other nozzles, the combustion improver conveying pipeline conveys combustion improver to other nozzles, and the combustion improver conveying pipeline conveys the combustion improver to other nozzles. And other nozzles spray the flue gas after heat storage, the fuel and the combustion improver into the heating furnace. According to the heat accumulating type combustion system, smoke sprayed out of the nozzle of the heating furnace can flow back into the heating furnace through the smoke conveying pipeline after being subjected to heat accumulation through the heat accumulator, the flame temperature in the heating furnace is reduced, energy-saving combustion of the combustion system is achieved under the most economical air-fuel ratio, and energy waste is avoided.

This invention belongs to the field of iron and steel metallurgy technology, specifically relating to a staged combustion system and process for a gas boiler. The system includes a burner connected to the gas boiler, a combustion-supporting gas structure, and a combustion-supporting air structure. The burner includes a combustion stabilizing plate, located at the front end of the burner and connected to the gas boiler. The combustion stabilizing plate has three layers of staged ignition units evenly arranged around its center: an inner layer, a middle layer, and an outer layer. The middle layer ignition unit includes multiple externally mixed combustion nozzles, where combustion-supporting air and gas mix outside the combustion stabilizing plate. The outer layer ignition unit includes multiple internally mixed combustion nozzles, where combustion-supporting air and gas mix inside the combustion stabilizing plate. The combustion-supporting gas structure provides fuel to the burner, and the combustion-supporting air structure provides combustion-supporting air to the burner. This invention effectively achieves complete combustion of the gas, reduces nitrogen oxide production, and provides a stable flame, demonstrating good performance in terms of safety, environmental protection, and efficiency.

A concentric sleeve is adopted as a premixer or a distributor, a water-cooling tube bundle and a gas injection tube bundle are welded alternately to form a combustion surface tube bundle, the concentric sleeve is communicated with the gas injection tube bundle, and gas injection holes are formed in the hearth side of the gas injection tube bundle. The inner layer of the concentric sleeve is communicated with the annular space, gas in the inner layer and air in the annular space are fully premixed, premixed gas enters the gas injection pipe bundle in the pipe length direction after turning by 90 degrees and is distributed, then the premixed gas is sprayed out of the gas injection holes for combustion, uniform ignition is conducted through a flat cable ignition spray pipe, a traditional large-size premixer and a distributor are abandoned, a large-area flow equalizing pore plate is not needed, and the cost is reduced. Gas is premixed, distributed and combusted evenly, resistance is low, flame rigidity is high, pollutant emission is low, the structure is compact, machining and transformation are easy, the burner is suitable for various furnace types such as corner pipes and cross flow pipes, a plurality of concentric sleeves can be arranged to be communicated with different gas spraying pipe bundles, different kinds of gas are sprayed in, and mixed blending combustion or independent blending combustion of various kinds of gas is achieved.

A flue gas recirculation system for preventing spontaneous combustion of accumulated powder in a medium-speed coal mill coal powder pipeline comprises a medium-speed coal mill, a coal-fired boiler, an induced draft fan and a recirculating flue gas pipeline; the coal-fired boiler comprises a burner, a coal powder pipeline is arranged at the outlet of the medium-speed coal mill, the outlet of the coal powder pipeline is connected to the burner via a mixing pipeline, the coal-fired boiler is connected to the inlet of the induced draft fan, and the outlet of the induced draft fan is divided into two paths, one path discharges flue gas, and the other path is connected to the coal powder pipeline via a recirculating flue gas pipeline. The present invention mixes the low-dust and low-oxygen flue gas at the outlet of the induced draft fan of the coal-fired power station boiler with the air-powder airflow at the outlet of the medium-speed coal mill by setting a recirculating flue gas pipeline, and the oxygen content of the medium after mixing is reduced to less than 14%, effectively preventing the spontaneous combustion of coal powder deposited in the coal powder pipeline, and eliminating the conditions for the occurrence of deflagration in the pulverizing system; the flow rate of the mixed medium is increased by 30% to 50%, preventing the deposition of coal powder in the medium. And prevent boiler slagging caused by high flame temperature in the burner area.

The utility model relates to a heat accumulating type combustion device, and belongs to the technical field of gas combustion devices. Comprising a hearth, a first heat accumulator and a second heat accumulator, a first air opening and a second air opening are formed in the hearth, the first heat accumulator is communicated with the first air opening through a first ventilation channel, and the second heat accumulator is communicated with the second air opening through a second ventilation channel; the included angle between the first ventilation channel and the first air opening and the included angle between the second ventilation channel and the second air opening are both smaller than 90 degrees, a first burner and a second burner are installed on the first ventilation channel and the second ventilation channel respectively, an outlet of the first burner faces the first air opening, an outlet of the second burner faces the second air opening, and a third burner is further installed on the hearth. According to the utility model, the problem of poor co-combustion caused by blockage of the air duct and the fuel port due to feeding at present is effectively solved, the production efficiency and the fuel combustion efficiency are high, the failure rate is low, and the emission of waste flue gas generated in production can reach the low-nitrogen and low-oxygen flue gas emission standard.

The invention relates to the technical field of boiler combustion flue gas and air systems, in particular to a pure oxygen combustion biomass boiler flue gas utilization system and method. The pure oxygen combustion boiler flue gas utilization system comprises a boiler, a dust remover, a carbon dioxide recovery assembly and a gas uniformizing box, the flue gas output end of the boiler is communicated with the dust remover, one part of the output end of the dust remover is communicated with the carbon dioxide recovery assembly, and the other part of the output end of the dust remover is communicated with the gas uniformizing box through a flue gas channel. The gas equalizing box is externally connected with a pure oxygen input channel, the pure oxygen and the flue gas are mixed into mixed flue gas in the gas equalizing box, and the output end of the gas equalizing box is communicated with the boiler. According to the flue gas utilization system for the pure oxygen combustion biomass boiler, flue gas and pure oxygen are mixed through the gas homogenizing box, preparation of mixed flue gas is completed in front of the boiler, oxygen and heat in the flue gas are fully utilized, meanwhile, the oxygen content in the mixed flue gas is conveniently controlled, adjustment can be conducted according to the temperature of the boiler, and pipe explosion accidents of the boiler are reduced.

The invention discloses an intelligent fire extinguishing method and device for an engine compartment and a vehicle. Smoke and temperature conditions in the engine compartment are detected through a smoke detector and a temperature sensor; the vehicle-mounted controller receives and processes the smoke and temperature signals and judges whether fire hazards exist or not; when the fire hazard exists, an alarm signal is sent to a driver; after the driver confirms the fire, a fire extinguishing system is triggered; the dry powder exploder starts the dry powder fire extinguishing device to spray dry powder into the cabin; meanwhile, an engine waste gas controller is turned on, and engine waste gas is released into a cabin from a turbine at high speed and high pressure so as to isolate air. According to the system, cabin fire extinguishing is intelligently completed without opening a cabin hood, a sensor in a cabin automatically triggers a fire extinguishing device on the hood to extinguish fire, and a driver can also extinguish fire in a passenger compartment through one key.

The present invention discloses a hydrogen and natural gas mixed combustion burner, comprising a burner body, a natural gas pipe and a hydrogen pipe. A combustion-supporting gas is introduced into the combustion body. A cyclone blade is provided at the end of the combustion body. The cyclone blade is provided with a combustion-supporting air hole connected with the inner cavity of the combustion body. A boss is provided at the center of the cyclone blade. The inside of the boss is hollow and provided with a hydrogen nozzle. The height of the hydrogen nozzle is less than the height of the boss. The top, outer side and inner side of the boss are all provided with natural gas nozzles. The natural gas pipe is provided inside the combustion body and the end is connected with the natural gas nozzle. The hydrogen pipe is sleeved in the natural gas pipe and the end is connected with the hydrogen nozzle. The burner uses hydrogen and natural gas as fuel for mixed combustion, which can effectively exert the advantages of hydrogen and solve the disadvantages of hydrogen when burned alone.

The invention discloses a multi-stage partition separation multi-fuel combustion burner and an operation method. The multi-stage partition separation multi-fuel combustion burner comprises a main combustion chamber and a burnout chamber. The main combustion chamber is located at the axial head of the combustor, and the burnout chamber is located at the tail of the combustor. Wherein the main combustion chamber comprises a main combustion module, a first mixed gas inlet channel and a second mixed gas inlet channel; the first mixed gas inlet channel and the second mixed gas inlet channel are alternately arranged on the outer side of the main combustion module; wherein an air inlet is formed in the main combustion module; during operation, active fuel gas and / or air enters the main combustion chamber from the gas inlet of the main combustion module to form flames, and mixed gas of the active fuel gas and the air enters the main combustion chamber from the first mixed gas inlet channel to form flames; and ammonia / air mixed gas enters the main combustion chamber from the second mixed gas inlet channel to form flame. The problems that ammonia ignition is difficult, combustion is unstable and the like can be effectively solved, and the co-combustion uniformity is improved.

The present invention relates to the technical field of gas turbines, and provides a combustion chamber micro-mixing head, a gas turbine combustion chamber and a gas turbine. The combustion chamber micro-mixing head comprises: a honeycomb unit, a vortex generator and an injection channel, wherein a plurality of honeycomb holes are arranged in the honeycomb unit, and the honeycomb holes extend along the thickness of the honeycomb unit to form a flow channel in the honeycomb unit, and injection holes for injecting hydrogen are arranged on the side wall of the flow channel, and by arranging a vortex generator in the flow channel in the honeycomb hole, the disturbance of air in all directions is increased, and a flow vortex along the way is generated, and the air flow rate is reduced, so that hydrogen is dispersed into the air very quickly along the entire cross section, thereby reducing the emission of NOx of micro-mixing combustion, and at the same time preventing the problem of hydrogen flashback, enhancing the safety and service life of hydrogen combustion, and reducing carbon emissions and carbon management costs.

This utility model discloses a yellow phosphorus tail gas combustion system that reduces the generation of acidic substances, belonging to the field of phosphorus chemical processing technology. It solves the problems of high cost, inefficiency, poor stability, and easy secondary pollution associated with existing technologies. The system includes three sequentially connected modules: tail gas pretreatment, combustion, and purification, forming a complete treatment pathway. The pretreatment module uses a centrifugal fan to transport the tail gas, a spray-filter desulfurization tower to remove sulfides, and a high-pressure backflush pipe to ensure stable airflow. The combustion module optimizes the air-fuel ratio, combines flue gas circulation and parameter monitoring to suppress nitrogen oxide generation, and is adapted to boiler waste heat utilization. The purification module is equipped with a waste heat recovery device before electrostatic precipitator to remove impurities. The system achieves desulfurization liquid regeneration and circulation, reduces equipment corrosion and treatment costs, ensures that exhaust gas emissions meet standards, and balances environmental protection and energy utilization efficiency.

The invention discloses a built-in heat exchanger, an RTO and a method for treating organic waste liquid and organic waste gas, the built-in heat exchanger comprises a frame type heat exchanger support with a fluid inlet, a return pipe with a fluid outlet and a fluid heat exchange pipeline, and the return pipe is arranged below the top of the heat exchanger support in a square frame shape; the multiple heat exchange pipelines are arranged in the width direction of the heat exchanger support in a mirror image mode and arranged in the length direction of the heat exchanger support, each heat exchange pipeline is provided with a bent section in a snakelike mode, the bent sections are provided with directions changing alternately, and the two ends of each bent section are of a broken-line-shaped structure, and each bent section comprises a first vertical section, a second inclined section and a third horizontal section, the length of the second inclined section is gradually decreased from the end to the center in the width direction of the heat exchanger support, and the two ends of the heat exchange pipeline are first vertical sections with upward and flush openings and communicate with the heat exchanger support and the length direction of the backflow pipe correspondingly. A multi-layer stacked structure is adopted, and each layer of heat exchange tube adopts a multi-circulation flow channel, so that the heat exchange area is increased, the shrinkage caused by thermal expansion and cold contraction is effectively absorbed, and three different space structures are formed.

The invention discloses a fireproof protection device for a cable and a bridge thereof, the fireproof protection device comprises an insulating layer and an inner core, the outer wall of the inner core is coated with the insulating layer, the outer side of the insulating layer is provided with a sheath, and a filling layer is arranged in a gap between the insulating layer and the inner core; a shielding layer is arranged between the insulating layer and the sheath, and a flame-retardant layer is arranged between the sheath and the shielding layer. When the insulating layer encounters high temperature, the insulating layer can be converted into a hard ceramic shell, and insulation and fire-imitating protection can be provided for the cable; electromagnetic interference can be effectively reduced, and certain fireproof protection can be provided for the cable; when combustion occurs, toxic smog is not generated, and good flame-retardant and fireproof performance is achieved; when the filling layer is subjected to high heat, the filling layer can be decomposed to absorb heat and release water vapor, the flame temperature can be reduced, combustion can be inhibited, the inner core and the insulating layer can be effectively prevented from moving or deforming when the cable is bent or stretched, and the stability of the cable structure can be improved.

The invention relates to a scorching method of a steam cracking furnace. The scorching method of the steam cracking furnace comprises the following steps: 1) carrying out gas-liquid separation on heavy hydrocarbon in a gas-liquid separation device to obtain a gas-phase material and a liquid-phase material, and depositing residues on the inner wall of the gas-liquid separation device, 2) conveying the gas-phase material to a radiation section furnace tube of the steam cracking furnace for pyrolysis, generating a pyrolysis product containing ethylene and depositing coke on the inner wall of the radiant section furnace tube; 3) conveying air and / or steam to pass through the radiation section furnace tube to remove at least a part of the coke to obtain scorched tail gas, and 4) enabling the scorched tail gas to enter a hearth of the steam cracking furnace through at least one combustor arranged in the hearth for combustion treatment. The decoking problem of the gas-liquid separation device of the heavy hydrocarbon cracking furnace can be effectively solved.

The invention relates to a combustion plate, a combustion system and gas water heating equipment. The combustion device comprises a combustion plate, the combustion plate comprises a first combustion hole and a second combustion hole, the combustion plate comprises a first combustion mode and / or a second combustion mode, in the first combustion mode, the first combustion hole outputs one of fuel gas and combustion-supporting gas, and the second combustion hole outputs the other of the fuel gas and the combustion-supporting gas, or in the second combustion mode, the second combustion hole outputs the other of the fuel gas and the combustion-supporting gas. In the first combustion mode, fuel gas in the first combustion holes flows into the second combustion holes and is output after being mixed with combustion-supporting gas in the second combustion holes, and in the second combustion mode, the second combustion holes output mixed gas of the fuel gas and the combustion-supporting gas. The cooling piece is connected to the combustion plate; wherein the first combustion holes and the second combustion holes are arranged in the same direction to form a combustion hole group, the cooling parts and the combustion holes in the combustion hole group are alternately arranged, and / or the cooling parts and the combustion hole group are alternately arranged. According to the combustion plate, the combustion system and the gas water heating equipment, tempering is not prone to occurring.

The invention belongs to the technical field of stainless steel rolling heating, and discloses a stainless steel rolling heating device which comprises a heating furnace provided with a combustion device. The combustion device is communicated with a gas pipe, and the input end of the gas pipe is connected with gas; the combustion device is communicated with a hot air pipeline, the input end of the hot air pipeline is connected with a heat exchange device, and tail gas generated after smoke of the heating furnace passes through the heat exchange device is communicated with a chimney. The combustion device is communicated with a flue gas pipe, and the input end of the flue gas pipe is connected with an induced draft fan; a stainless steel rolling heating method comprises the following heating steps that S1, a stainless steel material is prepared, and the stainless steel material is placed in a heating furnace; s2, the combustion device, the heat exchange device and the induced draft fan are started; and S3, data are detected through instruments of all the devices, the induced draft fan is controlled, and flue gas is conveyed to the combustion device through the flue gas pipe.

The utility model discloses a fire hole structure of a gas burner, which comprises a plurality of columnar bodies which are tightly arranged in sequence to form a fire hole wall; a cooling medium enters from the opening in one end of the cylindrical body, passes through the cavity and is discharged from the opening in the other end of the cylindrical body; a fire hole is formed between every two adjacent cylindrical bodies, and gas is sprayed out from one side of each fire hole for combustion; the fire hole comprises two hole grooves, and the two hole grooves are formed in the opposite sides of the two adjacent columnar bodies correspondingly. Wherein the two opposite hole grooves are mutually independent or partially communicated. The burner has the advantages of being small in machining difficulty, convenient to assemble, more stable in flame combustion and the like.

The utility model discloses a kind of composite double-track fireproof shutter, it is related to rolling shutter door technical field, including rack, rolling shutter door body, the rack is equipped with the spray assembly that can automatically spray water and extinguish fire, the rack is also equipped with the drive assembly that can drive rolling shutter door body to lift;By setting the spray assembly that can automatically spray water on rolling shutter door body, water can be sprayed to fire area actively when fire occurs, water droplet disperses and evaporates in flame, absorbs a large amount of heat, so that flame temperature is reduced to below its critical extinguishing temperature, to effectively control fire spread;Water can also be sprayed to curtain surface of rolling shutter door body simultaneously, water evaporation heat absorption can effectively reduce curtain surface temperature, prevent curtain surface from deforming or damaging due to high temperature, prolong the fire resistance time of curtain surface, enhance the fire separation function of fireproof shutter.

This invention relates to the field of fire-resistant aluminum composite panel technology and discloses a method for producing and processing fire-resistant aluminum composite panels, including the following steps: Step S1: Raw materials are fed into the hopper of a twin-screw extruder via a screw feeder and then into the twin-screw extruder. The twin-screw extruder melts and plasticizes the raw materials and extrudes them through a T-die. Step S2: The T-die sends the molten raw materials to a three-roll calender. The three-roll calender cools the molten raw materials and rolls and shapes them into a flame-retardant core board. Step S3: The two sides of the flame-retardant core board are bonded to the aluminum plate with a polymer adhesive film. After cooling and shaping, it becomes a fire-resistant aluminum composite panel blank and is placed in the cutting area for later use. Step S4: The fire-resistant aluminum composite panel blank is cut into the required dimensions according to production requirements. The aluminum plate scraps generated during cutting are separated from the flame-retardant core board. The aluminum plate is sold, and the flame-retardant core board is returned to the screw feeder for recycling. The production process is more environmentally friendly.

The utility model relates to the technical field of power generation of gas turbines, in particular to a steam spraying mechanism and a device for reducing nitrogen oxide generation of a gas turbine, which comprises a mounting component, a fixed part, a movable part arranged outside the fixed part, a spraying part arranged inside the fixed part and a clamping part arranged on the outer wall of the fixed part; the fixing part comprises a spraying pipe on the outer wall, a first protruding plate is arranged on the inner wall of the spraying pipe, and a second protruding plate is arranged below the first protruding plate. The nozzle is arranged, the temperature of the downstream flame face of the fuel gas hole is reduced, the nozzle is further matched with the spraying pipe, rapid disassembly and assembly of the nozzle are completed, and the blocked nozzle is convenient to replace; in addition, by arranging the cooling assembly and utilizing the mode of combining multiple transformation schemes, generation of nitric oxide is controlled, the combustion chamber of the gas turbine does not need to be integrally designed, and the research and development cost and the time cost are remarkably reduced while the needed effect is achieved.

The invention discloses a main flame expansion type low-NOx gas burner nozzle suitable for internal circulation of flue gas, relates to the technical field of combustion equipment, and solves the problem that thermal NOx is generated by gas fuel combustion of a burner due to high flame temperature of the main flame expansion type low-NOx gas burner nozzle. The device comprises a central fuel channel, an air channel and a plurality of main fuel channels, wherein the central fuel channel, the air channel and the plurality of main fuel channels are arranged on a hearth wall; the air channel coaxially sleeves the outer side of the central fuel channel, and the plurality of main fuel channels are uniformly distributed on the outer side of the air channel in a radial circumference manner; the main fuel channel comprises a main fuel inlet channel and a main fuel sleeve, one end of the main fuel inlet channel is connected with the hearth wall, and the other end of the main fuel inlet channel is connected with the main fuel sleeve. And a plurality of main fuel pipe flue gas inlets are uniformly formed in the circumference of the main fuel sleeve. Fuel is input in a dispersed mode through a plurality of channels, meanwhile, smoke is sucked into the fuel channels in an entrainment mode, the flame temperature is reduced, and therefore generation of thermal type nitric oxide is reduced.

The invention discloses a combustor and a combustion system.The combustor comprises a shell, a first-stage spray gun, an air channel and a second-stage spray gun, the first-stage spray gun, the air channel and the second-stage spray gun are arranged on the shell, mixed fuel comprises fuel and inert tail gas, and the mixed fuel sprayed out of the first-stage spray gun and air provided by the air channel are subjected to first-stage combustion; inert tail gas enables the mixing speed of fuel and oxygen to be reduced so as to reduce the combustion reaction speed, inert gas and residual air exchange heat with flames, the flame temperature is reduced, and then generation of NOx is reduced; mixed fuel sprayed by a second-stage spray gun and remaining air are subjected to second-stage combustion in a second combustion area, inert tail gas and circulating flue gas in the furnace dilute oxygen, the combustion reaction is slowed down, the surface area of a flame body is increased through staged combustion, the inert tail gas and the circulating flue gas in the furnace absorb and take away part of heat, local high temperature is eliminated, and the combustion efficiency is improved. And the generation of NOx is well inhibited.