219results about How to "Improve combustion intensity" patented technology

A burner assembly including a housing having an air inlet and a burner end. An impeller that is mounted in the housing is in communication with the air inlet and adapted to direct air toward the burner end of the housing. The burner assembly also includes an inner air tube that is mounted in the burner end of the housing so as to define an inner combustion zone and an outer combustion zone. The assembly further includes a plurality of radiation plates that are mounted in the burner end of the housing adjacent to the outer combustion zone, an inner air spin vane that is mounted on the inner air tube so as to direct some of the air from the impeller into the inner combustion zone, an inner gas injection nozzle mounted on the inner air tube so as to direct gaseous fuel into the inner combustion zone, an outer air spin vane that is mounted in the burner end of the housing so as to direct some of the air from the impeller into the outer combustion zone, and a plurality of outer gas injection nozzles that are mounted in the burner end of the housing so as to direct gaseous fuel into the outer combustion zone. A first castellated ring is mounted around the periphery of the inner air tube, and a second castellated ring is mounted around the periphery of the burner end of the housing.

The invention provides a decoupling combustion method, which comprises the following steps: a) firstly, performing pyrolysis and gasification of fuels to generate semicoke and gas; b) secondly, combusting part of gas and semicoke to perform oxidation reaction and reduction reaction to generate coke, and applying the generated heat to the pyrolysis and gasification in step a); c) thirdly, combusting the coke and the left gas generated in step a) under the condition that an excess air coefficient is less than 1, and simultaneously generating smoke in the combustion; and d) finally, performing full secondary combustion of the smoke and the remained gas after the steps. The decoupling combustion method can increase the decoupling combustion space and intensity with a smaller floor area; the increase of the gasification zone and the gasification intensity greatly improve the load increasing capability of a decoupling combustion furnace; and in addition, because the high-temperature smoke strongly heats the fuels in the upper part of a pyrolysis and gasification chamber and has higher pyrolysis and gasification intensity, the gas output is increased and the combustion amount of solid semicoke is reduced.

A low NOx oil gun utilizing returned heat to heat is prepared as setting ceramic combustion chamber and swirler in shell, connecting swirler with Venturi wind channel being set with Venturi wind inlet, setting general wind inlet tube on shell and setting oil gun of micro oil and ignition gun of high energy on inlet end of Venturi wind channel.

The invention discloses a coal air heater with a preignition hearth and a smoke recycler, which can solve the problems of present product with short service life, lower heating efficiency and worse environment pollution. Wherein, the wind inlet of cycle fan (24) via the cycle smoke channel (23) is through to the side opening (37) of smoke outlet channel (22)); the wind outlet of cycle fan (24) via the outlet (35) of cycle smoke channel (23) is through to the smoke channel (30); the preignition hearth (2) is fixed on the lower pat of coal hopper (3) between the left and right side walls (13). The inventive preignition hearth is thermal-insulated, with higher burning strength, and high application to variable coals. At the back of furnace row, the burnt coke can make the fire bed in open fire condition, to burn the gas fully; said air heater can avoid black smoke to reduce environment pollution; the cycle smoke channel can reduce the temperature of heat exchanger, to improve the service life and efficiency of air heater.

The invention relates to the fuel additive technical field, in particular to fuel coal additives and a method for preparing the same. The invention discloses the high-efficiency fuel coal additives, which mainly comprises raising agent, combustion improver and sulfur retention smoke agent and also comprises nano silicon dioxide with a weight ratio between 0.5 and 10 percent. The high-efficiency fuel coal additives makes fuel coal in the high temperature state; the boiler steam rate is gradually increased; the furnace temperature is improved by 100 DEG; the boiler thermal efficiency is improved by over 15 percent; the coal-saving rate reaches 5 to 20 percent; the desulfurization is obvious and the desulfurization degree is as high as 40 to 70 percent; the decoking process is quick; the total discharge of clinker is reduced by about 26 percent, thereby the carbon content of furnace cinder is reduced; by addition of the fuel coal additives, metals on the boiler heating surface can not be eroded, thereby the function of protecting equipment is brought into play and the service life of the equipment is prolonged. Moreover, the high-efficiency fuel coal additives can greatly reduce the environmental pollution and the atmospheric greenhouse effect, and greatly reduce the energy consumption so as to obtain obvious economic benefit.

The invention relates to a low-nitric-oxide direct-current pulverized coal combustor adaptive to a meager coal boiler, which can achieve stable and economical combustion, and also reduces nitric oxide emission to the lowest level, so that the low-nitrogen combustion modifying technique of the meager coal boiler is improved. The low-nitric-oxide direct-current pulverized coal combustor adaptive to the meager coal boiler comprises main combustor groups which are arranged on four corners of a hearth of the meager coal boiler in a four-angle tangential circle combustion mode, are matched with a water-cooling wall high-temperature-prevention corrosion system of the hearth, and are identical in structure; each main combustor group comprises pulverized coal combustors arranged at intervals and secondary air spray ports; the upper parts of the main combustor groups are provided with corresponding separation burnout air groups; a layer of precombustion chamber back flow combustor is arranged in each n-layer of pulverized coal combustors; the jet flow rotation direction of the main combustor groups is the anticlockwise direction; the rotation direction of secondary air ports close to the upper parts of the precombustion chamber back flow combustors is the clockwise direction, and the imaginary tangential circle diameter is greater than the imaginary tangential circle diameter of the main combustors; separation burnout air groups include upper groups and lower groups; and the jet flow of the lower groups is in an imaginary tangential circle mode, and the jet flow of the upper groups is in an opposed combustion mode.

A diffusion type porous medium gas fuel combustor comprises a shell, an air duct and a fire-resistant casing pipe, the air duct is connected with the shell, the bottom end of the shell is connected with the top plate of a gas flow dividing tank, the shell is internally provided with the fire-resistant casing pipe, a tray and a gas flow dividing tube from top to bottom, the bottom end of the fire-resistant casing pipe is contacted with the tray, the tray is fixed on the shell or the gas flow dividing tube, the bottom end of the gas flow dividing tube is fixed on the top plate of the gas flow dividing tank, and the gas flow dividing tube and the gas flow dividing tank are communicated internally; the fire-resistant casing pipe is provided with macro porous medium, micro porous medium and lower layer metal fiber from top to bottom, and the lower layer metal fiber is connected with the tray and the gas flow dividing tube simultaneously. The inventive diffusion type porous medium gas fuel combustor can be used for efficiently avoiding tempering when combustion intensity is stronger, thus achieving the effects of protecting micro porous medium and saving energy.

The invention discloses a partially premixed gas fuel burner of a bi-layer porous foamed ceramic plate. The partially premixed gas fuel burner comprises a shell, a macroporous foamed ceramic plate, a microporous foamed ceramic plate, a top air distributor and a bottom air distributor, wherein the shell comprises a cooling cavity in an annular structure and a shell base-plate arranged on the cooling cavity, the cooling cavity is provided with a cooling cavity used for providing secondary air to pass through, and the bottom of the cooling cavity is provided with a secondary air inlet communicated with the cooling cavity; the inner side wall of the cooling cavity is provided with a secondary air outlet communicated with the cooling cavity, an annular frame formed by the cooling cavity is sequentially provided with the macroporous foamed ceramic plate, the microporous foamed ceramic plate and the top air distributor from top to bottom; the bottom air distributor and a shell base-plate, the secondary air outlet is located between the microporous foamed ceramic plate and the top air distributor, and the shell base-plate is provided with a mixed gas inlet for providing mixed gas of fuel and air to enter. According to the burner provided by the invention, the heating efficiency can be improved, and the heating uniformity can be improved.

The invention discloses a multifunctional rare earth sulfur-fixing denitration energy-conservation additive, which solves the problems that the conventional sulfur-fixing agent has relatively low sulfur-fixing rate and does not have the function of reducing NOx emission. The additive is characterized by consisting of the following raw materials in percentage by mass: 8 to 10 percent of rare earth compound, 12 to 15 percent of inorganic salt, 51 to 65 percent of alkaline earth metal compound, 5 to 8 percent of aluminum compound, 5 to 8 percent of zinc compound and 5 to 8 percent of silicon compound. The additive is prepared by the following steps of: grinding the raw materials into fine particles with the particle size of 100 to 300 meshes; proportioning the particles according to the mass percentage at normal temperature; uniformly stirring and mixing; preparing powder from the mixture; and compounding. The additive has the advantages of capability of being popularized in a large area, high sulfur-fixing rate and denitration function and is suitable for coal-smoke type heavily-polluted production links.

The invention relates to a spherical top combustion hot air furnace with annularly distributed and vertically upward-jetting burner, and its structure: the lower part of the furnace body is equipped with flue hole, furnace bottom and furnace grate, a heat storage room is in the furnace body, there is a burner between the upper part of the furnace body and the furnace top, the furnace top is made with hot air outlet, there is coal gas preheating loop in the wall body of the burner, there is combustion supporting air preheating loop in swelling body at the upper part of the coal gas preheating loop, there are coal gas outlet and top nozzle at the upper part of the coal gas preheating loop, the wall body of the burner is equipped with coal gas inlet connected with the coal gas preheating loop, the wall body of the burner at the upper part of the coal gas inlet is equipped with combustion supporting air preheating loop connected with combustion supporting air inlet and outlet, the upper part of the air outlet is equipped with air nozzle. And the invention has a special and novel structure, and skillfully solves the key problems in the gas-flow mixing, gas-flow distribution, fume preheating and other combustion courses and has huge economic and social benefits.

The invention relates to a full premixed combustion smelting method and smelting furnace for producing glass using the method, wherein the method consists of disintegrating the raw materials, mixing and loading into flame for full contact with the flame, thus realizing completely premixed combustion and smelting, the droplets formed in smelting fall into the smelting pool through colliding each other and forming shaped liquid. The disclosed method can increase utilization factor of heat energy substantially.

The invention provides a method for improving combustion temperature of a combustion furnace by a local oxygen-enriched oxygenation jet flow combustion-supporting technology, comprising the following steps: oxygen-enriched gas with higher linear velocity is delivered to some combustion flame position for combustion-supporting through an oxygen-enriched nozzle with a small spread angle; and after pressurization, the oxygen-enriched gas enters a fuel flow area for mixing and combusting at 12-45 degrees with the jet fuel and with linear velocity which is 1.5-5.0 times of the fuel flow velocity in a jet flow manner, wherein the position in which the oxygen-enriched gas enters is at the center of the combustion flame position and is slightly deviated from a fuel nozzle. The invention further provides a corresponding device. The invention has the advantage that by adopting the special oxygen-enriched jet nozzle with the small spread angle and a thermal radiation principle, under the conditions that fuel consumption is not increased, any structure of the original furnace is not changed and only an oxygen-enriched preheating system and the oxygen-enriched nozzle are contacted with a furnace body, the temperature of a combustion flame area is improved maximally.

The invention belongs to the field of fuel cells, and particularly discloses a combustor for a medium-high temperature solid fuel cell and an application thereof. An air inlet and a fuel inlet are arranged at an inlet end of a static mixing cavity in the combustor and are used for mixing air and fuel to obtain mixed gas; a shunting orifice plate is connected with an outlet end of the static mixingcavity to provide a buffer area for the mixed gas and shunt the mixed gas; a metal mesh structure is connected with the shunting orifice plate, so that the phenomena of tempering and flamelifting areprevented; a combustion chamber is arranged on the outer side of the static mixing cavity and provides a space for mixed gas combustion; and a pulse igniter is arranged above the metal mesh structureand used for igniting the mixed gas. According to the combustor, the shunting orifice plate is utilized to provide the buffer area for the high-flow-rate mixed gas, meanwhile, flame generated by combustion is divided into a plurality of fine flame flows by utilizing the metal mesh structure, and stable gas flow and temperature gradient are formed, so that the phenomena of the tempering and flamelifting are prevented.

The invention discloses an intelligent control oxygen-enriched firing system for a kiln. The intelligent control oxygen-enriched firing system for the kiln comprises an oxygen-enriched system, an oxygen-enriched burner, a temperature measurement and analysis system, a firing expert optimization system and an intelligent control system. According to the intelligent control oxygen-enriched firing system for the kiln, the oxygen enrichment is produced and provided by a special oxygen-enriched system; the novel oxygen-enriched burner is adopted; according to different coal powder types, coal powder amount and grinding granularity of a kiln system, the shapes and temperature distribution of flames are obtained by the accurate temperature measurement and analysis system, all on-site actual thermal parameters and on-site states of the kiln are combined, the system analysis and the prediction and judgment are carried out by the firing expert optimization system, and the intelligent regulationand dynamic matching of the special oxygen-enriched system are controlled by the intelligent control system, so that the optimal operation state of the firing system of the kiln is kept, the efficientand stable burning of coal powder in the oxygen-enriched burner is realized, the consumption of the coal powder is reduced, the quality of burned materials is improved, the generation and emission ofNOx are effectively reduced, meanwhile, the fluctuation of the kiln system caused by the debugging experience and level difference of operators is reduced, and the normal and stable operation of thekiln system is guaranteed.

The invention relates to a completely-premixed gas burner, which comprises a nozzle, an ejector, a distribution chamber, a shunting plate and a burning fire-hole plate, wherein the nozzle is arranged on one end of the ejector, and the other end of the ejector is connected with the distribution chamber; the shunting plate is arranged on the distribution chamber; the burning fire-hole plate is arranged above the shunting plate; gas is injected into the ejector via the nozzle and is evenly mixed with air ejected and boosted by the ejector in the distribution chamber; and the mixture flows into the burning fire-hole plate after being shunted by the shunting plate. Compared with the prior art, the completely-premixed gas burner has the advantages of complete burning, low pollutant discharge amount in smoke and the like.

The invention relates to a turbulent combustor allowing premixed gas flow to force flue gas to flow back for preheating combustion. The turbulent combustor effectively solves the problems that the mixing rate of coal gas and air is low, mixing of the coal gas and the air is not uniform, combustion intensity is low, temperature is low, mixing is incomplete, space is large, and the structure is unreasonable. A combustion chamber is formed in a combustion chamber wall. An air inlet pipe and a coal gas inlet pipe on the combustion chamber wall are connected with an air distribution channel and a coal gas distribution channel. The coal gas distribution channel is provided with a coal gas lead-out nozzle which is connected with a coal gas and air premixing channel. The air distribution channel is provided with an air lead-out pipe which is connected with an air ejecting nozzle. The air ejecting nozzle is connected with the coal gas and air premixing channel. The top of the coal gas and air premixing channel is provided with a vertically upward premixed gas nozzle. The combustion chamber wall is provided with a hot air outlet pipe. According to the turbulent combustor, it is guaranteed that a hot-blast stove efficiently operates in high heat intensity at high air supply temperature under the premise of being safe and stable, so that the good effects of saving fuel, reducing investments, lowering exhaust gas temperature and harmful gas emissions and reducing environmental pollution are achieved.

The invention discloses a green and efficient incineration method for hazardous waste in a rotary kiln based on oxygen enriched air supply in a secondary combustion chamber. The method comprises the steps of (1) adding solid waste, liquid waste and a first combustion-supporting gas to the rotary kiln for performing treatment; (2) feeding the waste and the liquid waste which are treated by means ofthe rotary kiln and a second combustion-supporting gas into a secondary combustion chamber for performing combusting treatment; and (3) exhausting the gas which is obtained after the combustion in the secondary combustion chamber, wherein the second combustion-supporting gas is formed by mixing air and an oxygen enriched gas; the incineration temperature in the secondary combustion chamber is risen to 1,100 to 1,200 DEG C; the oxygen concentration of the second combustion-supporting gas is 23 to 28 percent; the oxygen content of a combustion environment in the secondary combustion chamber isimproved, and a technical means of the preheating is effectively utilized, which are beneficial to removing nitrogen oxides from flue gas in a waste heat utilization system under the condition of ensuring complete decomposition of the harmful substances, such as dioxin; the production and emission of secondary environment pollution substances in an incineration processing process are avoided or remarkably reduced; and efficient and green treatment of maximum reduction of the hazardous waste is realized.