25results about How to "Stable combustion" patented technology

The application discloses a premixing noise reduction burner and relates to the technical field of burners. The premixing noise reduction burner comprises a burner body and a gas mixing structure. The burner body is internally formed with a first premixing chamber and a second premixing chamber. A first sound insulation plate is located between the first premixing chamber and the second premixing chamber. The burner body is provided with a second sound insulation plate opposite to the first sound insulation plate. The first sound insulation plate is provided with an ignition mechanism. The gas mixing structure is arranged in the second premixing chamber. The first premixing chamber and the second premixing chamber of the premixing noise reduction burner can be used for mixing air and gas. The first sound insulation plate and the second sound insulation plate can reduce the flow rate of the mixed gas, so that the mixed gas can be more fully mixed. Meanwhile, the first sound insulation plate and the second sound insulation plate can also reduce the noise of the mixed gas. Therefore, the premixing noise reduction burner can fully mix the air and the gas, stably burn the mixed gas and effectively reduce the noise of the mixed gas.

This invention discloses a nicotine-resistant pectin lyase mutant and its application in tobacco leaf treatment. Using pectin lyase PL6 as the starting enzyme, this invention designs and optimizes mutation sites, designing single-site saturation mutations based on the two hydrogen bond formation sites between the enzyme and nicotine, Lys-107 and Asp-84, to construct mutants. The pectin lyase mutants D84A and K107R of this invention retain 83.63% and 81.30% of their enzyme activities at a 1% nicotine concentration, respectively. Spraying tobacco leaves with D84A and K107R enzyme solutions significantly improves tobacco leaf quality due to pectin degradation.

This utility model relates to the field of gas appliance technology, specifically providing a honeycomb heating element and a burner for use in a burner. The honeycomb heating element includes a honeycomb heating element body and a first flow restrictor. The first flow restrictor includes a first flow restricting part and a second flow restricting part, which cooperate to form a groove-shaped structure. The honeycomb heating element body is embedded in the groove-shaped structure. The first flow restricting part is attached to the bottom of the honeycomb heating element body; the second flow restricting part is attached to the side surface of the honeycomb heating element body to form a tight, filling fit with the inner wall of the outer ring of the burner cavity when the honeycomb heating element body is installed in the burner cavity. This utility model improves the sealing performance of the honeycomb heating element when installed in the burner cavity, preventing gas flow from flowing out from the junction of the honeycomb heating element and the burner cavity, improving the stability of gas combustion, and avoiding backfire.

The application discloses a kind of high-temperature combustion atmosphere under packed bed structure multivariate detection system and method, gas supply system, porous medium combustion unit, real-time monitoring system sequentially connect, the top of porous medium combustion unit is provided with high-temperature flue gas collection pipe, high-temperature flue gas collection pipe is connected product recovery chamber, product analyzer in turn;Real-time detection system includes temperature monitoring system and shape filler topography monitoring system;Detection rod is used to detect temperature abnormal area and the temperature and topography condition of different height cross section in combustion unit interior.This application uses thermocouple and high-speed camera to monitor temperature and outer filler crushing and discoloration condition in real time, detects the local temperature and topography state of inner filler that cannot be directly observed by detection rod, records overall damage and discoloration degree, quantitatively judges whether damage affects combustion.The health status of detection packed bed is helpful to the efficient use of low calorific value fuel, reduces pollutant emission, avoids resource waste.

The application belongs to the technical field of engines, and proposes a combustion chamber head structure and a combustion chamber. The combustion chamber head structure comprises a head ring and a guide plate. The inner wall of the guide plate is sleeved with a vortex generator. A fuel nozzle cap cover is inserted into the vortex generator to form a swirl cup structure. A plurality of blowout holes for blowing off carbon are arranged on the side wall of the fuel nozzle cap cover to realize the fuel flushing of the nozzle shell blowout port, effectively inhibit the fuel adhesion on the nozzle shell blowout port and the nozzle end face, and ensure the long-time work of the nozzle shell. Meanwhile, in combination with the vortex generator, the extinguishing margin of the ground slow speed and the air slow speed is expanded while meeting the long-life work of the nozzle.

The present application relates to the field of boiler combustion technology of thermal power plant and discloses a pulverized coal burner, the pulverized coal burner comprises a first combustion cylinder, a flow guide pipe, a second combustion cylinder and a combustion stabilizer, the flow guide pipe has an air inlet end and an air outlet end, the air outlet end is communicated with the first combustion cylinder, the flow guide pipe is used for guiding the mixed gas flow carrying the pulverized coal into the first combustion cylinder, the second combustion cylinder is arranged in the interior of the first combustion cylinder, an annular channel is formed between the second combustion cylinder and the first combustion cylinder, the second combustion cylinder is used for dividing the mixed gas flow into a first-stage gas flow flowing through the second combustion cylinder and a second-stage gas flow flowing through the annular channel, the combustion stabilizer is arranged on the flow guide pipe, the combustion stabilizer has an air outlet part, the air outlet part is in the interior of the flow guide pipe and faces the second combustion cylinder, and the air outlet part is used for spraying the flame and igniting the first-stage gas flow and the second-stage gas flow in sequence. The pulverized coal burner of the embodiment of the present application can be ignited in batches and realize stable and sufficient combustion.

The application discloses a contact type regenerative combustor based on pure ammonia catalysis and a thermoelectric conversion system thereof, and the device comprises a body surrounded by an upper wall surface, a lower wall surface and a side wall surface, and the body is provided with a plurality of splitter plates and a tail gas baffle; the inner surfaces of the upper wall surface and the lower wall surface are coated with a perovskite catalyst layer; the outer sides of the upper wall surface and the lower wall surface are directly attached with thermoelectric modules, and the outer sides of the thermoelectric modules are provided with cooling plates. The application optimizes the flow field and enhances the disturbance through the splitter plates, guides the tail gas to preheat the mixed gas by using the baffle, and reduces the reaction activation energy by using the catalyst to assist combustion; the high-temperature tail gas directly heats the hot end of the thermoelectric module, and the liquid cooling plate maintains the low temperature of the cold end, thereby forming efficient thermoelectric conversion. The application has the advantages of compact structure, high thermal efficiency, effectively widened stable working range of ammonia combustion, and solved problems of small temperature difference, low efficiency and poor combustion stability of ammonia fuel of the existing combustor thermoelectric system.

The utility model discloses a garbage incinerator hearth heat -proof heat preservation optimization structure belongs to garbage incineration equipment technical field, aims at solving traditional incinerator heat loss big, furnace wall temperature is high, the low temperature of secondary air leads to the problem such as high operating cost, low combustion efficiency, including inner furnace wall, outer furnace shell, both constitute double -deck structure, and the inner furnace wall front arch, rear arch is water cooled wall, and the vertical section is equipped with secondary air through -hole, and below is the furnace grate, the outer furnace shell and the inner furnace wall form cavity heat -proof, and its arch shell is equipped with the air extraction bin and through -hole, and the air extraction bin communicates cavity, and the through -hole corresponds with secondary air through -hole, and the fan passes through the air extraction pipe, air supply pipe and will cavity hot air as secondary air send into hearth. Meanwhile, water cooled wall and arch shell are matched through hanging block, positioning column, hanging groove, positioning groove, and are fixed with bolt, ensure that the connection is firm, and the structure realizes efficient heat -proof heat preservation and waste heat recovery, and optimizes secondary air supply, improves combustion efficiency, reduces pollutant emission and operating cost.

This application relates to a hydrogen-blended combustion system for a coal-fired power boiler and a method for operating the system. The method includes: acquiring the operating status information of the coal-fired power unit; determining the operating stage of the unit based on the operating status information; during a deep peak-shaving period, controlling the pulverized coal-hydrogen mixed burner in the main combustion zone to blend hydrogen for combustion, assisting in stable combustion at low loads; during a period of rapid load increase, controlling both the pulverized coal-hydrogen mixed burner in the main combustion zone and the pure hydrogen burner in the burnout zone to simultaneously blend hydrogen, rapidly increasing the boiler's thermal load; and during a period requiring peak load, controlling both the pulverized coal-hydrogen mixed burner in the main combustion zone and the pure hydrogen burner in the burnout zone to simultaneously blend hydrogen, enhancing the unit's constant load capacity. This effectively improves the dynamic load adaptability of the coal-fired power unit and ensures the combustion effect of the coal-fired power boiler.

This invention relates to an automatic feeding method based on the upper grate advance time, belonging to the field of waste incineration control technology, and includes the following steps: S1: The DCS control system collects the start and end times of the upper grate advance and calculates the upper grate advance time; S2: The DCS control system recalculates the feeding speed of the feeder based on the change in the upper grate advance time, and sends the calculation result to the incinerator grate hydraulic station control system to adjust the feeding speed of the feeder; S3: The DCS control system recalculates the number of cycles of the upper grate based on the change in the upper grate advance time, and sends the calculation result to the incinerator grate hydraulic station control system to adjust the number of cycles of the upper grate; S4: The DCS control system recalculates the number of cycles of the lower grate based on the change in the upper grate advance time, and sends the calculation result to the incinerator grate hydraulic station control system to adjust the number of cycles of the lower grate.

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.

This utility model discloses a dual-source multi-combustion system, comprising: a boiler, wherein an exhaust gas burner, a pulverized coal silo burner, and at least two air-coal burners are provided; a plurality of main combustion coal mills are connected to one or more air-coal burners; a plurality of pulverized coal storage mills are connected to the remaining air-coal burners in the boiler; a gas drying system is connected to the main combustion coal mills and the pulverized coal storage mills respectively, for drying and conveying the coal ground in the main combustion coal mills and the pulverized coal storage mills to form primary air-coal mixture; a plurality of fine powder separators are used to separate the primary air-coal mixture to form pulverized coal and exhaust gas; a plurality of exhaust gas fans are used to collect exhaust gas, and the outlets of the exhaust gas fans are connected to the exhaust gas burner and the pulverized coal storage mill respectively; a plurality of pulverized coal silos are used to collect the pulverized coal generated in the fine powder separators; a hot medium conveying system is used to convey the pulverized coal in the pulverized coal silos to the pulverized coal silo burners, and the gas drying system is also connected to the hot medium conveying system to preheat the pulverized coal conveyed to the pulverized coal silo burners.

The present application relates to the technical field of boiler combustion and discloses a multi-stage coal powder burner, which comprises an outer combustion cylinder, an inner combustion cylinder, an adjuster and a combustion stabilizer, the inner combustion cylinder is arranged inside the outer combustion cylinder, a channel is formed between the outer combustion cylinder and the inner combustion cylinder, the adjuster is connected with the outer combustion cylinder, the adjuster is used for guiding mixed gas flow, the mixed gas flow can be divided into a first-stage gas flow flowing through the inner combustion cylinder and a second-stage gas flow flowing through the channel, the adjuster is used for adjusting the flow of the first-stage gas flow and the second-stage gas flow, the combustion stabilizer is connected with the inner combustion cylinder, the combustion stabilizer is provided with a flame spout, the flame spout is arranged in the inner combustion cylinder and is used for spouting a flame to ignite the first-stage gas flow and the second-stage gas flow step by step. The multi-stage coal powder burner of the present application can adapt to different coal types to realize rapid ignition and stable and sufficient combustion.

This invention discloses a fuel atomization system suitable for the combustion chamber of a regenerative micro gas turbine, comprising: a T-shaped evaporator, a swirling oil-gas duct, a coaxial atomizing nozzle, an air intake pipe, and a fuel line protection sleeve; the T-shaped evaporator, the swirling oil-gas duct, and the coaxial atomizing nozzle are arranged coaxially, the air intake pipe is eccentrically connected to the side wall of the coaxial atomizing nozzle and can introduce high-pressure gas from the section before the regenerator after the compressor, the initially atomized mixed oil and gas enters the swirling oil-gas duct for further atomization and then evaporates and is ejected through the T-shaped evaporator, the fuel line protection sleeve is coaxially arranged on the outside of the swirling oil-gas duct and the coaxial atomizing nozzle and can avoid the direct impact of high-temperature backflow gas on the coaxial atomizing nozzle. This invention can significantly optimize fuel atomization quality, shorten the combustion chamber length, improve combustion efficiency, and improve the uniformity of combustion chamber outlet temperature distribution by adding a coaxial atomizing nozzle and an air intake pipe upstream of the traditional evaporator.

The utility model discloses a high accuracy temperature control gas heat treatment furnace with filter structure, including gas heat treatment furnace, the rear end fixed mounting of gas heat treatment furnace has the burner, one side of burner is connected with gas inlet pipe, one side mounting of gas heat treatment furnace has temperature control equipment, another side of burner is connected with air intake structure. The utility model discloses a high accuracy temperature control gas heat treatment furnace with filter structure, set up air intake structure, filter in the air -intaking time, improve the protective property, through the air filter cartridge of set up backflushing air pipe, and motor can drive backflushing nozzle to rotate, make backflushing nozzle in the inside air filter cartridge backflushing cleaning, improve the efficiency and convenience of maintenance.

The application discloses an energy-saving natural gas internal combustion generator set, which is characterized by comprising a box shell, a generator set whole, an exhaust device, a filtering device and a preheating device; any side surface of the box shell in the width direction is provided with an air inlet, and the length direction side surface is provided with an air outlet; the exhaust device comprises an exhaust pipeline which extends upwards to the top of the box shell; the preheating device is arranged on the side surface of the box shell of the air inlet and is communicated with the air inlet; the preheating device comprises a plurality of heat exchange pipelines, and the gaps between the heat exchange pipelines are used for gas flow, so that the gas outside the box shell enters the box shell through the gaps; the preheating device further comprises an air inlet part and an air outlet part which are communicated with the two ends of the heat exchange pipelines; the air inlet part extends into the box shell and is communicated with the exhaust pipeline, and the air outlet part is communicated with the exhaust pipeline outside the box shell, so that the hot gas in the exhaust pipeline is introduced into the air channel and then is discharged into the exhaust pipeline through the air outlet part, thereby heating the cold gas flowing through the gaps and improving the temperature of the gas entering the box shell.

This invention discloses a system for seasonally recovering waste heat from low-temperature flue gas and desulfurization slurry to synergistically eliminate white plumes. The system includes a flash tower, an indirect heat exchanger, and a type I absorption heat pump. Addressing the difficulties in recovering and utilizing heat and water resources from saturated wet flue gas and slurry after desulfurization, as well as the inability to continuously utilize system waste heat, this system utilizes a flash tower, indirect heat exchanger, and type I absorption heat pump to recover waste heat from the slurry for seasonal heating of the heat network return water and pre-drying of fuel. Heat from the saturated wet flue gas is used seasonally to preheat the heat network return water or air via the indirect heat exchanger. Water in the desulfurized slurry and flue gas is collected and treated for continued use in system makeup water, reducing system water consumption. This invention achieves seasonal and continuous utilization of waste heat from desulfurized flue gas and slurry through valve opening and closing, improving system energy efficiency while reducing the possibility of "white plume" formation, thus contributing to further energy conservation and emission reduction goals for coal-fired power plants.

The application provides an engine air intake unit structure, an air intake assembly structure and an engine. The engine air intake unit structure comprises an air intake header and a methanol injector. The air intake header comprises an air intake pipe section with open ends and a mixing pipe section in communication with the air intake pipe section. The air intake pipe section extends along a first direction, and the mixing pipe section extends along a second direction. The first direction is perpendicular to the second direction. An end of the mixing pipe section away from the air intake pipe section is used to be in butt joint with an engine cylinder head. At least two injection positions are arranged on the mixing pipe section. The methanol injectors are arranged at the injection positions. Multiple methanol injectors inject methanol into the mixing pipe section. The injection directions of the multiple methanol injectors intersect with each other in a plane perpendicular to the second direction. The technical scheme of the application integrates the methanol injectors and the air intake header into an independent unit module, avoids direct corrosion of the methanol on the cylinder head, reduces the difficulty of improvement of the cylinder head, prolongs the mixing path of the methanol and air, and improves the uniformity and optimizes the combustion by cooperating with the cross injection of the methanol injectors.

The utility model relates to material flame retardant performance test technical field, and disclose PBT material flame retardant testing arrangement, including box, the both sides wall of box all are installed first electric hydraulic cylinder, the rear part hinge of box upper end has the apron, the inside bottom end middle part of box installs the ignition mechanism, the lower end of box is installed with the support, the inside end of first electric hydraulic cylinder all are through the box and are installed with the clamping seat, the upper part of clamping seat front end wall all installs the fixed plate, the lower end of fixed plate all installs second electric hydraulic cylinder, the lower end of second electric hydraulic cylinder all installs the clamping plate, in the utility model, the both sides of PBT material are put into the clamping seat, start two second electric hydraulic cylinders, drive the clamping plate to move downward, the both sides of PBT material are extruded and fixed, start two first electric hydraulic cylinders, drive two clamping seats to move outward, straighten PBT material, can firmly hold the PBT material sample of different shape and size, ensure that the combustion process meets the test standard requirement.

This invention discloses an ultra-low pollutant emission combustion device for natural gas internal flue gas circulation, relating to the field of burner technology, and solving the problem of excessive initial nitrogen oxide emissions from existing gas-fired boilers. The invention features a flue gas entrainment hole on the main flame gas nozzle; an air channel constriction at the end of the air channel; and a shift flame gas pipe extending into a gas mixing cylinder with several shift flame short pipes at the end. Gas is radially ejected from the shift flame short pipes and axially ejected from the shift flame gas pipes. Upon contact with the mixed combustion-supporting gas after passing through the swirl vanes, ignition occurs. The flame rotates along the sleeve and is ejected into the furnace, superimposing with the gas ejected from the main flame gas nozzle to stabilize combustion. This invention introduces flue gas into the furnace through the high-speed fluid ejection effect formed by the air channel constriction and the main flame ejector nozzle, increasing the inert gas concentration in the combustion zone. The flue gas absorbs heat and dilutes the oxygen concentration, reducing the combustion rate and temperature, and inhibiting NOx formation.

The application relates to an EUV process waste gas treatment device and method, wherein the EUV process waste gas treatment device comprises a water tank assembly, a reaction tower assembly and a washing tower assembly are connected to the water tank assembly; the reaction tower assembly comprises a gas inlet top cover located at the top, a plurality of gas inlet pipes are arranged on the gas inlet top cover, the gas inlet pipes are arranged in a central position in a direction inclined to the axial direction of the gas inlet top cover; the gas inlet top cover comprises an internal combustion air interlayer, the gas inlet pipe comprises a waste gas inlet pipe and an air inlet pipe which are arranged in a nested mode, the air inlet pipe is provided with a gas inlet gap at the position of the combustion air interlayer, the waste gas inlet pipe is closed at the inlet end, and a plurality of waste gas inlets are uniformly arranged in a ring shape at the closed position; a burner is installed at the central position of the gas inlet top cover, and the plurality of gas inlet pipes are arranged in a central position in a cross mode relative to the flame jet of the burner. The device can be suitable for uniform mixing and stable combustion of 600 SLM large-flow hydrogen, and the tail end meets the emission standard of less than 1% of the volume concentration.