52results about How to "Improve fire stability" patented technology

The present invention discloses a radial gradation double air regulation cyclone coal powder burner, including nozzle with burner, internal first air channel, external first air channel, internal second air channel, external second air channel, internal tooth profile combustion-stabilizing ring, external tooth profile combustion-stabilizing ring, double-cone flare, stopper coal powder concentrator and central pipe cyclone coal powder burner. It utilizes two air channels to implement radial gradation combustion.

The invention discloses a recirculating fluidized bed oxygen-enriched combustion apparatus, which comprises an air compartment, an air distribution device arranged above the air compartment and a hearth arranged above the air distribution device; the upper part of the hearth is connected with a high-temperature cyclone separator; the upper part of the high-temperature cyclone separator is connected with a heating surface; the lower part of the heating surface is connected with an economizer. The invention further discloses an operation method of the recirculating fluidized bed oxygen-enriched combustion apparatus. The recirculating fluidized bed oxygen-enriched combustion apparatus and the operation method thereof, disclosed by the invention, overcome the defects in the prior art, and intermediate temperature flue gas is used as primary air and secondary air which respectively enter the hearth to serve as recirculating air, in addition, oxygen is injected into the primary air and the secondary air, and the oxygen injection amount can be adjusted, meanwhile, an oxidizing agent is provided for combustion in the hearth, the concentration of CO2 discharged from a boiler of a recirculating fluidized bed can be enriched to more than 80%, and the capture of the CO2 in the flue gas after combustion of coal is facilitated.

The present invention is related to a multifilament continous textile yarn made by melt spinning of a nanocomposite comprising as components at least one polymer and carbon nanotubes, and to its uses, in particular in the textile industry.

The invention discloses an extra high-energy spark discharge system. The system comprises an ignition energy control unit, an inductive discharge unit, a DC (Direct Current)-DC boosting unit, an energy-storage capacitor bank and a combined outward opening-type spark plug. According to the system, by inductive discharge, a spark plug gap is broken down, and a plasma channel is formed between a positive electrode and a negative electrode, and therefore, a high-energy capacitor connected in parallel near the spark plug is caused to discharge. Different from other high-energy ignition systems, the extra high-energy spark discharge system can reach as high as several Joules in single ignition energy, and meanwhile, a stable shock wave can be formed to prompt the formation of a fire core. The extra high-energy spark discharge system can be used for lean combustion occasions with higher flow rate and lower temperature, such as high-latitude gas turbine engine restart, pulse detonation engine start, homogeneous charge compression ignition piston engine ignition, pressurizing direct injection gasoline engine ignition and the like. The combustion stability can be remarkably improved, the combustion efficiency is improved, and pollutant emission during a combustion process is reduced.

The invention relates to the technical field of power equipment, in particular to a spray nozzle and a gas turbine with the same. The spray nozzle comprises a central body, an annular wall and a cyclone device. Premixed fuel channels and a diffused fuel channel which are independent from one another are respectively arranged on the central body; fuel can be respectively sprayed to a central body mixing channel and a peripheral mixing channel by the premixed fuel channels, so that fuel and air mixtures can be formed; fuel can be directly sprayed into the fuel and air mixtures at positions, which are close to the end walls of the central body, by the diffused fuel channel, the fuel and air mixtures are sprayed out of the central body mixing channel, partial premixed combustion flame can be ultimately formed in the center of an outlet of the spray nozzle, the fuel and air mixtures which are sprayed out of the peripheral mixing channel can be ignited, and peripheral premixed combustion flame can be formed. The spray nozzle and the gas turbine have the advantages that the flame stability and the combustion efficiency of the spray nozzle under low-load conditions can be greatly improved under the effect of the partial premixed combustion flame in the center of the outlet of the spray nozzle, and effects of facilitating structure machining and maintaining can be realized.

The invention relates to the technical field of power equipment, in particular to a spray nozzle and a gas turbine. The spray nozzle comprises a central body, an annular wall and a cyclone device. A peripheral mixing channel is formed between the annular wall and the central body, a central body mixing channel is arranged inside the central body, premixed fuel channels and a diffused fuel channel which are independent from one another are further respectively arranged on the central body, fuel can be respectively sprayed to the central body mixing channel and the peripheral mixing channel by the premixed fuel channels, fuel and air mixtures can be formed, fuel can be directly axially sprayed to a flame tube by the diffused fuel channel, and flame modes with middle diffusion combustion flame, inner-layer premixed combustion flame and outer-layer premixed combustion flame can be ultimately formed at an outlet of the spray nozzle. The spray nozzle and the gas turbine have the advantages that the flame stability and the combustion efficiency of the spray nozzle under low-load conditions can be greatly improved under the effect of diffusion combustion; the outlet of the spray nozzle is mainly structurally improved, and accordingly effects of facilitating structure machining and maintaining can be realized.

The invention discloses a little oil burner of a double-sided ignition combination blunt body. A primary air pipeline is communicated with a secondary coal dust combustion chamber through a section of coal dust concentrator formed by a tapered pipeline with a throat part formed through invagination, a primary coal dust combustion chamber is arranged in the secondary coal dust combustion chamber, and the secondary coal dust combustion chamber extends into a tertiary coal dust combustion chamber. The upper side surface and the lower side surface of the tertiary coal dust combustion chamber connected with the secondary coal dust combustion chamber are provided with a plurality of secondary air inlets in equal intervals, an upper oil combustion chamber and a lower oil combustion chamber are arranged on the primary coal dust combustion chamber after aslant penetrating through the secondary coal dust combustion chamber, a combination blunt body is arranged at the port of the secondary coal dust combustion chamber, and a plurality of through-flow holes are arranged on the upper surface and the lower surface of the second coal dust combustion chamber positioned in the tertiary coal dust combustion chamber. By adopting the top and bottom arrangement of two oil guns, coal dust entering into the primary coal dust combustion chamber are ignited in a double side way, which strengthens turbulent mass and heat exchange of coal dust current and oil flame to rapidly heat the coal dust and form a fire curtain, thereby prolonging the residence time of the coal dust and strengthening the ignition process.

The invention discloses a cyclone pulverized coal combustion device adopting a smoke recirculation device and a pre-combustion chamber, and relates to the field of industrial pulverized coal boiler combustion devices. The cyclone pulverized coal combustion device solves the problem that in the case of an existing industrial pulverized coal boiler, the NOx emission is large, slagging is serious, the combustible content of fly ash is high, and combustion stability is poor. The cyclone pulverized coal combustion device is characterized in that a cyclone pulverized coal combustor is connected witha boiler through the pre-combustion chamber, an inner-side smoke recirculation air pipe, an inner secondary air pipe, an outer-side smoke recirculation air pipe and an outer secondary air pipe are sequentially and coaxially arranged on a primary air pipe from inside to outside in a sleeving mode, and are internally provided with cyclones, an inlet of the inner-side smoke recirculation air pipe and an inlet of the outer-side smoke recirculation air pipe are connected with the recirculation smoke pipeline correspondingly, a recirculation fan is arranged at the inlet end of a recirculation smokepipeline, the inlet end of a separation secondary air nozzle is connected with the recirculation smoke pipeline and the outer secondary air pipe, and the outlet end of the separation secondary air nozzle is connected with the boiler. The cyclone pulverized coal combustion device is used for reinforcing staged combustion and reducing the concentration of nitric oxide.

The invention provides a coal powder partial gasification cooperative denitration system and method. The structure is simple, design is reasonable, reformation is convenient, ultra-low emission of nitrogen oxides of a power station boiler can be realized without ammonia injection, and technical economy is high. The coal powder partial gasification cooperative denitration system comprises a coal bin, a coal mill, a boiler, a cyclone separator, a gasification furnace and a filter; a coal outlet of the coal bin is connected with an inlet of the coal mill, a coal powder outlet of the coal mill isrespectively connected with an inlet of the cyclone separator and a burner nozzle arranged in the main combustion area of the boiler, and the coal powder outlet of the coal mill is connected with a primary air pipe; a fine coal powder outlet of the cyclone separator is connected with the burner nozzle, and a coarse coal powder outlet of the cyclone separator is connected with an inlet of the gasification furnace; a coal gas outlet of the gasification furnace is divided into two paths, one path is connected into a flame folding angle area of the boiler through a reburning nozzle, the other pathis connected into a tail flue after passing through the filter, and the tail flue connects the coal gas into the tail flue at the tail of an air preheater through a spray gun; and a catalyst layer isarranged on the downstream part of a spray gun in the tail flue.

The invention relates to a fireproof material taking gypsum as a base material and a construction method thereof, and belongs to the technical field of building materials. The fireproof material taking gypsum as a base material is a two-component system, wherein the component A is prepared from the following materials in parts by weight: 30-80 parts of gypsum, 0-30 parts of polystyrene particles,0-30 parts of vermiculite, 1-15 parts of fiber, 50-100 parts of sodium carbonate, 1-5 parts of graphite, 1-5 parts of alpha-olefin sodium sulfonate, 1-10 parts of gypsum retarder, 1-3 parts of fillerand 1-3 parts of dicalcium silicate; and the component B is modified aluminum hydroxide and accounts for 5-30% of the weight of the component A. By means of the fireproof material, the one-time spraying thickness of a base material can reach 50 mm, and the problem caused by the fact that the thickness requirement is met only when workers conduct spraying on the base material many times is avoided.

The invention belongs to the field of combustion equipment and technology, and discloses a coal and ammonia co-combustion burner for a corner tangential coal-fired boiler, which comprises a central air pipe, and a primary air sleeve and a peripheral air sleeve are sequentially sleeved outside the central air pipe; a bluff body supporting column is arranged in the central air pipe, a plurality of axial rotational flow blades are arranged on the bluff body supporting column, a stable combustion bluff body is arranged at the air outlet end of the central air pipe, a plurality of ammonia spraying pipes are arranged at the air inlet end of the primary air sleeve, a flow guide plate and a primary air supporting plate are fixedly arranged in the primary air sleeve, and the flow guide plate is arranged in the axial direction of the central air pipe. The primary air sleeve is connected with the central air pipe through a primary air supporting plate; a peripheral air volute is arranged at the air inlet end of the peripheral air sleeve, a peripheral air supporting plate is arranged in the peripheral air sleeve, and the peripheral air sleeve is connected with the primary air sleeve through the peripheral air supporting plate. The coal-ammonia mixed combustion device is suitable for coal-ammonia mixed combustion, the ignition stability of pulverized coal can be improved, the carbon content of fly ash can be reduced while emission of nitric oxide is not increased, and carbon emission of a power station boiler is reduced.

The invention provides a thick-thin burner. The thick-thin burner comprises two pulverized coal inlet pipelines, a horizontal main pipeline, a spray hole and a plurality of blunt body components, wherein ends of the two pulverized coal inlet pipelines are provided with pulverized coal inlets, and the other ends of the two pulverized coal inlet pipelines are crossed with each other to form a V shape; the horizontal main pipeline is connected to a crossed part of the two pulverized coal inlet pipelines, and a guide plate is arranged inside the horizontal main pipeline, a pulverized coal primarypipeline is arranged inside the guide plate, and a pulverized coal auxiliary pipeline is arranged outside the guide plate; the spray hole is horn-shaped, and is connected to the guide plate; the bluntbody components are distributed at the periphery, close to the outlet end, of the spray hole, the horizontal main pipeline and the pulverized coal inlet pipelines are connected in a 150-degree roundchamfer; through the round chamfer, concentration of pulverized coal at the two sides of the horizontal main pipeline is lower than center concentration, so that primary thick-thin separation of pulverized coal is accomplished; one side, close to the pulverized coal inlet pipelines, of the guide plate and a pulverized coal incoming direction define an angle of 120-150 degrees, so that low-concentration pulverized coal at the two sides of the pulverized coal main pipeline is separated out and enters the pulverized coal auxiliary pipeline; and through the spray hole, pulverized coal cannot be quickly diffused to the boundary, so that center concentration of the pulverized coal at the spray hole is high, and peripheral concentration is low, and therefore, thick-thin separation is accomplished.

The invention provides a dangerous waste swirl-flow melting system and a dangerous waste treatment and recycling method thereof, and relates to a dangerous waste melting system and a treatment and recycling method thereof. Effective melting and toxin-free discharging effects of existing solid-state or liquid-state dangerous wastes cannot be easily realized in a treatment process, the ignition stability is not high and the heat energy utilization rate is poor. The top of a vertical type combustion barrel is communicated with a crushing device; a horizontal type combustion barrel is located under the vertical type combustion barrel and one end of the horizontal type combustion barrel is communicated with the vertical type combustion barrel; a primary air inlet is formed in the part, close to a barrel wall at one end of the vertical type combustion barrel, of the horizontal type combustion barrel; a secondary combustion-supporting combustor is located on the barrel wall of the horizontal type combustion barrel and is arranged nearby the primary air inlet; and a waste liquid drying device is located above the horizontal type combustion barrel and is communicated with the horizontal type combustion barrel through a powder combustor. The dangerous waste treatment and recycling method comprises the following steps: step 1: carrying out primary treatment; step 2: carrying out primary melting; step 3: drying waste liquid; step 4: carrying out secondary melting; and step 5, recycling residual heat. The dangerous waste swirl-flow melting system and the dangerous waste treatment and recycling method are used for treating dangerous wastes.

The invention relates to the field of engines, in particular to a necking-down type combustion chamber. The necking-down type combustion chamber comprises a combustion chamber body. The combustion chamber body comprises an opening, a throat and a bottom face. The throat comprises a throat upper edge, a throat lower edge, an annular arc protrusion and a throat opening part. The plane where the throat opening part is located divides the combustion chamber body into an upper-layer flow guiding cavity and a lower-layer combustion cavity. The flow guiding cavity is defined by a flow guiding side wall arranged between the opening and the throat upper edge. The flow guiding side wall gradually outwards extends to the opening from the throat upper edge. The combustion cavity is defined by a combustion side wall arranged between the throat lower edge and the bottom face, and the combustion side wall gradually shrinks to the throat lower edge from the bottom face. The throat opening part is in acircular shape, and the bottom face is a circular flat bottom face. Through the flow guiding action of the flow guiding cavity, extrusion flow is guided to directly flow into the combustion chamber body, the ignition stability is improved, and the combustion speed is increased.