221results about "Combustion using liquid and pulverulent fuel" patented technology

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 application relates to a direct-flow combustor and swirl combustor cooperative combustion device and method, and belongs to the technical field of tangential circle boiler combustion technology. In order to solve the problems of poor stable combustion effect of a coal power unit only relying on pulverized coal combustion at 20%-30% rated load, reduced denitration efficiency during low-load operation, and unstable combustion caused by coal quality deviating from the design value, the application relies on the direct-flow primary air and direct-flow secondary air of a direct-flow combustor, the stable combustion cavity of a self-help stable combustion combustor, and swirl inner secondary air, so that a center backflow area is formed in the center of a swirl combustor, as a stable ignition heat source, high-concentration pulverized coal is heated, a flame formed by the self-help stable combustion combustor is ignited, a direct-flow pulverized coal combustor primary air powder flame is ignited, external flame combustion-supporting technologies such as micro-oil or plasma are not used, and the stable combustion effect of the coal power unit only relying on pulverized coal combustion at 20%-30% rated load is realized. The application is mainly used for improving the stable combustion effect of a boiler during work.

The invention discloses a calcination and afterburning integrated coal gangue decarbonization device. The coal gangue decarbonization device comprises a shell, a multi-channel pulverized coal combustion gun and a secondary air heating combustor, an air reversing cavity, a combustion cavity and a calcination cavity which are sequentially communicated in the gas flowing direction are formed in the shell, the air reversing cavity is provided with a secondary combustion-supporting air inlet, the combustion cavity is provided with a primary air inlet and a tertiary combustion-supporting air inlet, and the calcination cavity is provided with a coal gangue feeding port. The multi-channel pulverized coal combustion gun is inserted into the primary air inlet, and the secondary air heating combustor is arranged close to the secondary combustion-supporting air inlet. The structure of the coal gangue calcining device is simplified, the problems of material cost, air leakage, heat loss and the like of external equipment and pipelines are reduced, and the construction and operation cost of the coal gangue calcining device is reduced. Meanwhile, through the hot air chamber furnace structure adapting to fine powder combustion and the high-temperature secondary air heating process design, the problems that the low-heating-value coal gangue is difficult to ignite and the heat value cannot be released are solved, and suspension calcination of the low-heating-value coal gangue is achieved.

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 invention discloses flue gas recirculation and oxygen-enriched combustion collaborative denitration equipment for a pulverized coal fired boiler, and belongs to the technical field of collaborative denitration. The pulverized coal boiler comprises a heat exchange tank, and a combustion tank and a smoke return pipe are arranged in the heat exchange tank. One side of the smoke return machine shell communicates with a combustor shell, and the combustor shell communicates with the combustion tank. An igniter and a graded oxygen-enriched combustor are arranged in the combustor shell, and the graded oxygen-enriched combustor comprises a central oxygen channel structure, a pulverized coal air channel structure and a compensation oxygen channel structure; core flames of pulverized coal air are ignited through the central oxygen channel structure, then the pulverized coal air with low oxygen content sprayed out of the pulverized coal air channel structure is ignited through the core flames, and a low-oxygen combustion section close to the root of the fire tongue is formed. Oxygen is sprayed out through the compensation oxygen channel structure, so that pulverized coal air is subjected to oxidation reaction and is fully combusted; according to the invention, a staged combustion effect can be formed, nitrate substances generated by a pulverized coal oxidation reaction are greatly reduced, and the capability of denitration of combustion flue gas is improved.

This invention relates to a high-efficiency co-combustion device and method for a direct-flow burner and a swirl burner, within the field of tangential boiler combustion technology. To address the problem of tangential boilers failing to operate stably at 15% or lower rated loads, and the issues of nozzle overheating and burnout due to low primary air velocity in the direct-flow burner, as well as pulverized coal blockage in the pipes, this application utilizes a co-combustion method combining a direct-flow burner and a swirl burner. By introducing a system to increase the air velocity and temperature of the direct-flow burner and a supplementary air system for the swirl burner, the direct-flow primary air velocity is increased, thereby enhancing the direct-flow primary air ejection capacity. This allows for adjustment of the shape and size of the central recirculation zone and prevents nozzle overheating and burnout due to low air velocity in the duct. Simultaneously, increasing the temperature of the direct-flow primary air and the self-regulating combustion burner's primary air increases the pulverized coal temperature at the boiler inlet, strengthening initial ignition and burnout of the pulverized coal. This application is primarily intended to improve the stable combustion effect of boilers operating below 15% of rated power.

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.

Provided are a pulverized coal boiler with a bottom combustor, and a control method for the pulverized coal boiler, wherein the pulverized coal boiler includes a furnace, at least one bottom combustor and a secondary air distributing device. Each combustor is provided with a combustor spout, and the secondary air distributing device surrounds the combustor and is arranged at the bottom of the furnace. The secondary air distributing device includes an internal secondary air distributing device and an external secondary air distributing device, wherein the internal secondary air distributing device includes an internal secondary air gathering box and an internal secondary air pipe, and the external secondary air distributing device includes an external secondary air gathering box and an external secondary air pipe.

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).

The invention relates to a method for optimizing and adjusting deep combustion of a tangential boiler of a coal-fired power plant, which comprises the following steps of: arranging pulverized coal burners at four corners of the lower part in a hearth of the tangential boiler or on a boiler wall, and arranging SOFA air nozzles at four corners of the hearth or on the boiler wall above the pulverized coal burners; sOFA air nozzles at four corners of a hearth or on a furnace wall are divided into two groups, the vertical swing angle of one group of SOFA air nozzles is inclined upwards, the vertical swing angle of the other group of SOFA air nozzles is inclined downwards, and a coal-fired power plant tangential boiler stable load deep combustion optimization and adjustment test is combined, so that the problems of residual smoke rotation at a stable load hearth outlet of the boiler and low smoke emission are effectively solved. The problems that the flue gas temperature deviation of a hearth outlet is large, the reheating steam temperature deviation is large, the low-load reheating steam temperature is low, the desuperheating water amount of a high-load reheater is large, the nitric oxide deviation of a denitration inlet is large, and the steam temperature or the wall temperature is overhigh are caused are solved, and meanwhile the low-nitrogen emission requirement is met.

The application discloses a system and method for blending biomass and ammonia gas in a pulverized coal furnace, and belongs to the technical field of fuel combustion. The boiler combustion area is divided into a stable combustion zone, a main combustion zone, a reduction zone I, a burnout zone I, a reduction zone II and a burnout zone II. The stable combustion zone is provided with a biomass burner and a pulverized coal burner, the main combustion zone is provided with a biomass burner, a pulverized coal burner and an ammonia gas burner, the reduction zone I and the reduction zone II are arranged with ammonia gas burners, and the burnout zone I and the burnout zone II are arranged with burnout air ports, which is conducive to the stable blending combustion of pulverized coal, biomass and ammonia gas and reduces the emission of nitrogen oxides. The application improves the combustion stability and relieves the problems of ash deposition, slagging and corrosion through biomass pretreatment such as secondary crushing, water washing and drying. The application uses the heat of high-temperature flue gas for liquid ammonia gasification and biomass drying, thereby improving the energy utilization rate.

A burner system suitable for deep peak shaving includes a dual-purpose burner for both coal combustion and burnout, located directly below and above a pulverized coal burner. The combustion system's air box includes a pulverized coal burner air box and a dual-purpose burner air box. The pulverized coal burner air box is connected to the pulverized coal burner, and the dual-purpose burner air box is connected to both the dual-purpose burner and the burnout air burner. The dual-purpose burner is arranged in the burnout air area of ​​the furnace. By opening or closing the pulverized coal pipeline of the dual-purpose burner, it can flexibly function as both a pulverized coal burner and a burnout air burner depending on the unit load, ensuring that the main reheat steam temperature under low load and the NOx generated by combustion under high load meet design requirements.

The invention belongs to the field of hot water boilers, and particularly relates to a low-nitrogen condensation hot water boiler which comprises a combustion furnace pipe, an ignition table is fixedly connected to the position, close to the front end, of the interior of the combustion furnace pipe, and a front partition plate and a connecting plate are fixedly connected to the outer sides of the two ends of the combustion furnace pipe correspondingly. A plurality of second heat exchange pipes parallel to the combustion furnace pipe penetrate through the front partition plate and the connecting plate, the front end of the front partition plate is wrapped by a front smoke plate, the rear end of the connecting plate is connected with a smoke return box, and the outer side of the front partition plate and the outer side of the smoke return box are further wrapped by a heat preservation tank. Compared with the prior art, nitrides in waste gas are reduced, aftertreatment steps and cost required during waste gas emission are saved, impact force generated in the combustion process is effectively dispersed into a water body, the combustion furnace pipe is protected, meanwhile, the water body is effectively stirred, water body vaporizing is assisted, and the process of protecting equipment is achieved.

The invention provides an ignition assembly, a natural gas incineration device and an LNG transport ship. The natural gas incineration device comprises a combustion chamber, and the ignition assembly comprises a supporting disc, a combustion head and an igniter. The supporting disc is connected to the combustion chamber and provided with an air inlet hole used for introducing combustion-supporting air into the combustion chamber. The combustion head is connected to the side, close to the interior of the combustion chamber, of the supporting disc, the peripheral side of the combustion head forms a grid-shaped pipe wall, the grid-shaped pipe wall comprises a plurality of grid rings, the grid rings are arranged in the axial direction of the ignition assembly, the adjacent grid rings are elastically connected and form a vacant part, and the vacant part is used for introducing BOG gas into the combustion chamber. The igniter is arranged on the side, close to the combustion chamber, of the supporting disc. According to the ignition assembly, the gas amount of the BOG gas entering the combustion chamber can be adjusted according to the working condition change of the BOG gas, so that combustion of the BOG gas and combustion-supporting air is more sufficient, the emission of the LNG transport ship reaches the standard, and the safety of the LNG transport ship is also improved.

The invention relates to a gradual coal-fired pulverized coal boiler pipeline connecting system and method, and belongs to the technical field of coal-fired boilers, and the gradual coal-fired pulverized coal boiler pipeline connecting system is sequentially provided with a first branch, a second branch and a third branch; a primary fan is arranged at the head end of the first branch, the air outlet end of the primary fan is divided into two side paths, one side path is communicated with a coal mill through an air preheater, the other side path is communicated with the coal mill through a cold air adjusting valve, the air outlet end of the coal mill is connected with a pulverized coal burner through a primary air pipe, and the pulverized coal burner is arranged at the bottom of the boiler; a secondary air fan is arranged at the end of the second branch, the air outlet end of the secondary air fan is communicated with an air preheater, the air outlet end of the air preheater is connected with a plurality of fourth branches through secondary air pipes, the fourth branches are arranged at intervals in the height direction of the boiler, and a more uniform and longer combustion zone is formed and can be regulated and controlled through a regulating valve; the air outlet end of the boiler is connected with an air preheater through a third branch, and the air outlet end of the air preheater is connected with a chimney.

The invention relates to the technical field of boiler combustion and discloses a multi-stage pulverized coal burner which comprises an outer combustion cylinder, an inner combustion cylinder, an adjuster and a combustion stabilizer, the inner combustion cylinder is arranged in 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 and used for guiding in mixed airflow, and the combustion stabilizer is arranged in the outer combustion cylinder. The mixed airflow can be divided into first-stage airflow flowing through the inner combustion cylinder and second-stage airflow flowing through the channel, the adjuster is used for adjusting the flow of the first-stage airflow and the flow of the second-stage airflow, the flame stabilizer is connected with the inner combustion cylinder, the flame stabilizer is provided with a flame spraying opening, and the flame spraying opening is formed in the inner combustion cylinder and used for spraying out flames to ignite the first-stage airflow and the second-stage airflow step by step. The multi-stage pulverized coal burner provided by the embodiment of the invention can adapt to different coal types to realize rapid ignition and stable and sufficient combustion.

The invention discloses a pulverized coal combustion method and system suitable for low-load operation of a boiler, and the method comprises the steps that high-temperature flames are provided through an independent fire source, so that the high-temperature flames and air distribution of an original combustor form a fire-rich and thin air cascade combustion mode, and the high-temperature flames supplement insufficient fire heat; by controlling the mixing proportion of high-temperature flames and air powder, the hearth temperature and the oxygen concentration are adjusted, so that low-load stable combustion is achieved, and generation of nitric oxide is restrained; by additionally arranging the independent fire source, the insufficient ignition heat is supplemented, and the problems that the boiler is low in hearth temperature, weak in airflow and unstable in combustion during low-load operation are solved. The independent fire source and the original primary air pulverized coal are simultaneously fed into the boiler for continuous combustion. High-temperature flames and air distribution of an original combustor form a fire-rich and thin air cascade combustion mode, and it can be guaranteed that the unit is stably ignited and combusted under any load.

An apparatus for treating a fluid including an organofluorine compound, the apparatus including: a vessel that contains a liquid with a fluoride bonding agent; a combustion chamber in fluid communication with the vessel via an outlet submerged in the liquid; an inlet configured to introduce the fluid into the combustion chamber; and a flame source configured to produce a flame in the combustion chamber to at least partially break down the organofluorine compound to form a gaseous combustion product bearing fluoride, wherein the gaseous combustion product passes from the outlet of the combustion chamber through the liquid so that the fluoride in the gaseous combustion product is at least partially bound by the fluoride bonding agent.

The invention relates to an automatic propelling and withdrawing device for a combustor, and belongs to the field of combustion devices. The supporting assembly is arranged on the combustion device; the moving assembly is arranged on the supporting assembly, and the moving assembly can move relative to the supporting assembly; the combustor assembly is arranged on the moving assembly, the combustor assembly can move relative to the supporting assembly under the control of the moving assembly, and the combustor assembly is matched with or separated from the combustion device; and the driving assembly is arranged on the supporting assembly or the combustion device, the driving assembly is in transmission connection with the moving assembly, and the driving assembly is used for driving the moving assembly to move relative to the supporting assembly. According to the automatic propelling and withdrawing device for the combustor, the moving assembly can be moved and switched between the first position and the second position, so that the combustor assembly is accurately moved to the assembling position or the withdrawing position, and reliable assembling and disassembling of the combustor assembly are guaranteed.

The invention provides an apparatus and method for operating a cyclone burner using a gaseous fuel.

A pyrolysis system for conducting a hydrocarbon pyrolysis reaction and related systems and methods are disclosed herein. In some embodiments, the pyrolysis system includes a combustion component, a reaction chamber thermally coupled to the combustion component, and a recycling component fluidly coupled to an output of the reaction chamber. The reaction chamber can be couplable to a supply of pyrolysis feedstock. The thermal coupling allows the reaction chamber to transfer heat from the combustion component to the pyrolysis feedstock to generate a product stream that includes hydrogen gas and solid carbon. The recycling component receives the product stream and can direct a portion of the product stream into the combustion component. In some embodiments, the pyrolysis system includes a controller configured to adjust various operational parameters of the pyrolysis system based on various goals for combustion fuel consumption, hydrogen gas output, energy consumption, reactor efficiency, and / or the like.

The invention discloses a natural gas burner capable of reducing nitric oxide and a natural gas boiler. The natural gas burner comprises a pipe body, a fuel spray pipe and a burning head. A circulating flue gas inlet is formed in the middle of the pipe body; the device further comprises a distribution mechanism. The distribution mechanism comprises a distribution pipeline and an adjusting mechanism; a middle conveying channel is arranged in the distribution pipeline, and a peripheral annular conveying channel is formed between the outer side wall of the distribution pipeline and the inner side wall of the pipe body; the distribution pipeline comprises a separation pipe and a distributor; the rear end of the separation pipe is connected with the combustion head; the adjusting mechanism is used for driving the distributor to move back and forth along the axis of the separation pipe; a plurality of middle gas spraying holes are formed in the middle area of the combustion head; and a plurality of peripheral air injection holes are formed in the peripheral area of the combustion head. The natural gas burner can effectively reduce the burning temperature of a flame core area, facilitates optimization of a temperature field in a natural gas boiler and reduces emission of nitric oxide.

The application belongs to the technical field of combustion wind tunnel, and discloses a water-cooled ignition ring for an air heater ignition torch. The water-cooled ignition ring comprises a cooling outer ring and a cooling inner ring which are connected in a nested manner from outside to inside, the cooling outer ring is provided with corresponding annular clamping grooves and clamping rings on both sides, and the water-cooled ignition ring is connected with adjacent sections through the clamping grooves and the clamping rings. The water-cooled ignition ring is provided with a cooling water outlet and an opposite cooling water inlet. The contact surfaces of the cooling outer ring and the cooling inner ring are provided with annular water-cooled channels, the cooling outer ring is internally provided with a water collecting cavity which is communicated with the annular water-cooled channels, and the cooling water outlet and the cooling water inlet extend into the water collecting cavity. The water-cooled ignition ring is further provided with a torch interface which penetrates through the cooling outer ring and the cooling inner ring, and the torch interface and the cooling water outlet and the cooling water inlet are staggered. The water-cooled ignition ring has the advantages of small volume, simple structure, low manufacturing cost, good heat insulation effect and the like, and can be applied to the air heater of the combustion wind tunnel.

This invention discloses a variable premixed flameless combustion furnace, comprising: a furnace body with an air inlet at the bottom and a flue gas outlet at the top; multiple variable premixed burners arranged at intervals in the lower part of the furnace body; a gas pipeline with its first axial end adjustablely positioned within the air pipeline, and its second axial end extending outside the air pipeline to form a fuel inlet, the gas pipeline slidingly sealing with an end cap; multiple ignition sources, each corresponding to one of the multiple variable premixed burners, for igniting the fuel at the burner outlet; and multiple blunt body assemblies, each corresponding to one of the multiple variable premixed burners, each blunt body assembly positioned between the corresponding variable premixed burner and an ignition source. The flameless combustion furnace provided by this invention is easy to operate and can achieve stable flameless combustion.

The utility model discloses ultra-low load stable combustion equipment for an opposed firing boiler, which relates to the technical field of power station boilers and comprises two peak regulation combustors, a plurality of conventional turbulent combustors and a plurality of over fire air systems, the peak regulation combustors, the conventional turbulent combustors and the over fire air systems are all communicated with the interior of the combustor hearth, the peak regulation combustors are communicated with the corresponding coal mills, and the conventional turbulent combustors are matched with the corresponding coal mills. The boiler is reasonable in design, due to the fact that the peak regulation combustor is provided with the pre-combustion chamber, the exhaust gas separation device and the exhaust gas nozzle, the boiler can have ultra-low-load self-stable combustion capacity under the condition that a single combustor does not feed oil or plasma combustion supporting is achieved, and when the boiler needs low-load operation, the peak regulation combustor is put into operation to meet the deep peak regulation capacity of 15% rated load of the boiler.

To provide a thermal power generation method that can decrease the amount of carbon dioxide discharged therefrom, without requiring forcible injection of carbon dioxide present in exhaust of a thermal power station into the ground.SOLUTION: The thermal power generation method utilizing the combustion of an organic fuel and an inorganic fuel according to the present invention, with the inorganic fuel being an inorganic matter that can be combusted using oxidized carbon gas as combustion supporting gas, a hydrogenated inorganic matter with at least a portion thereof being hydrogenated, or a mixture of an inorganic matter and a hydrogenated inorganic matter, is characterized in that the inorganic fuel is combusted using oxidized carbon gas present in exhaust gas generated by the combustion of the organic fuel, as combustion supporting gas, and the carbon present in the oxidized carbon gas is solidified.SELECTED DRAWING: Figure 1

The utility model relates to the technical field of low-nitrogen combustors, in particular to an adjusting mechanism for a low-nitrogen combustor, which comprises a bottom plate, a low-nitrogen combustor body and a horizontal adjusting mechanism, the horizontal adjusting mechanism comprises a vertical plate fixedly connected to the upper end face of the bottom plate, and a sliding rod is slidably connected to the outer wall of the vertical plate in a penetrating manner; the vertical adjusting mechanism comprises a mounting plate located over the sliding rod, the low-nitrogen burner body is mounted on the upper end face of the mounting plate, and a jack is mounted between the mounting plate and the sliding rod. The low-nitrogen burner is simple to operate and convenient to use, the mounting plate can be driven to move up and down through the jack, so that the height of the low-nitrogen burner body is adjusted, the axis of the low-nitrogen burner body can be quickly aligned with the heating surface of a boiler for different boilers, adjustment is convenient, and time and labor are saved.