565results about How to "Burn evenly" patented technology

A method and apparatus for controlling a candle flame. A candle flame may be provided in a controllable environment, e.g., a semi-enclosed area formed at least in part by a cover. Air may be forced into the semi-enclosed area by an air movement device (e.g., a fan) to diffuse a candle's fragrance. The fragrance diffusion rate may be reduced by reducing (e.g., stopping) air flow into the semi-enclosed area.

The invention discloses a household gas burner, belonging to the part in the household gas kitchen range. The present household gas burner has the complex structure, poor processing precision and big accumulative error in assembling. The household gas burner comprises a nozzle, a gas distributing device, a gas mixing device and a fire lid, and characterized in that the gas distributing device and the gas mixing device are all the integrated structure, wherein the gas distributing device comprises a gas supplying pipe and a distributing chamber, a primary air inlet open is arranged on the distributing chamber, the nozzle is fixed on the orifice of the gas supplying pipe in the distributing chamber; the gas mixing device comprises a mixing pipe, a mixing chamber, a buffer baffle plate and a secondary air inlet slot, the mixing chamber is matched with the distributing chamber, the buffer baffle plate is arranged above the orifice of the mixing pipe in the mixing chamber, the secondary air inlet slot is arranged at the side surface of the gas mixing device. The gas distributing device and the gas mixing device in the invention have no accumulative error in assembling, simple assembling and safe and reliable use.

The invention designs a dual-fuel spark-ignition internal combustion engine based on a variable air channel, and a control method, aims at solving the problem that effective adjustment cannot be carried out on an intake flow and an airflow direction in an air channel, of an internal combustion engine adopting the traditional intake structure, and in particular, an internal combustion engine adopting a four-valve structure, and solving the problems of instable combustion, difficult ignition, fire and the like generated during lean combustion, and develops a dual-fuel spark-ignition internal combustion engine based on a variable air channel, and a control method. The invention provides a variable intake system. According to the variable intake system, the optimal airflow movement under different working conditions is obtained through control for the opening and closing of a swirl control valve, and in combination with a piston top surface with a special shape. The invention discloses a combined internal combustion engine technology for carrying out in-cylinder direct injection and intake channel injection respectively on the basis of two fuels. The different combustion modes of an in-cylinder mixed gas are realized through control for an injection time and an injection pulse width, and in combination with an airflow movement, and then the working efficiency of the internal combustion engine under different working conditions is improved, and oil consumption and emission are reduced.

The invention discloses an environment friendly type industrial smoke overall treatment boiler which comprises a boiler body, a heat exchange box and a purification box. A base is arranged at the bottom end of the boiler body, a burning cavity is arranged inside the boiler body, a burning separating plate is arranged at the lower end of the burning cavity, a fuel gas pipe is arranged below the burning separating plate, one end of the fuel gas pipe is connected with a fuel gas device, a feeding opening is formed in one side of the burning cavity, a conveying belt is arranged on the outer side of the feeding opening, a combustion-supporting pump is arranged on one side of the burning cavity, a supporting plate is arranged above the burning cavity and supports a water tank, and water in the water tank is heated to be discharged through a water discharging pipe; and the heat exchange box is arranged, heat of smoke in a smoke pipe is transferred to water in the heat exchange box, the waterin the heat exchange box is preheated, the water heating speed is increased, the heat energy is sufficiently used, the using amount of fire coal can be reduced, and energy conservation and emission reduction are achieved. The environment friendly type industrial smoke overall treatment boiler is reasonable in design, practical, feasible, more user-friendly and suitable for application and popularization.

The invention relates to a coal fired boiler capable of controlling flue gas oxygen content, which comprises a furnace body provided with a fire grate and a hearth, wherein the lower part of the fire grate is provided with a furnace bottom wind box; fuel gas in the hearth is exhausted from a chimney by a draught fan after passing through a venturi passage and a dust remover; an oxygen content analysis sensor is arranged between the hearth and the venturi passage and is connected with an oxygen content PLC; a fuel gas return pipe provided with a circulating fan is arranged between the draught fan and the chimney; the other end of the oxygen content analysis sensor is connected with an upper layer fuel gas return pipe with an upper layer fan and a wind box fuel gas return pipe respectively; the upper layer fuel gas return pipe is provided with an upper layer wind control valve, is controlled by the oxygen content PLC and is communicated with the hearth; the wind box fuel gas return pipe is provided with a wind box control valve and is controlled by a wind box temperature PLC; and the circulating fan and the upper layer fan are driven by an alternating current variable frequency speed control motor and are controlled by the wind box temperature PLC and the oxygen content PLC respectively. The coal fire boiler has the advantages that: firstly, the coal fire boiler can run under lower excess air and the hearth temperature is low during running so that the benefit of the boiler can be improved remarkably and the environmental pollution caused by the emission of NOx is reduced; and secondly, the coal fired boiler can adopt more extensive coal with low ash melting point to enlarge the serviceable range of the boiler and prolong the service life of the coal fired boiler.

The invention discloses an ultra-low nitrogen gas burner, which comprises a combustion cylinder, a shell and a motor, wherein the combustion cylinder is connected through a rotary positioning pin, thecombustion cylinder is a necking combustion cylinder, the front end of the combustion cylinder is provided with a flue gas internal circulation channel, the flue gas is sucked into the channel to bemixed with combustion-supporting air, a fuel pipe is arranged in the combustion cylinder along the central axis, a plurality of primary fuel spray guns and secondary fuel spray guns which are arrangedaround the circumference of the fuel pipe are also arranged in the combustion cylinder, the ring layer of the primary fuel spray guns is arranged outside the ring layer of the secondary fuel spray guns, and the primary fuel spray guns and the secondary fuel spray guns are arranged at intervals around the inner ring layer and the outer ring layer of the circumference of the fuel pipe, a combustionstabilizing cover is arranged between the fuel pipe and the combustion cylinder, a plurality of blades are arranged in the combustion stabilizing cover; and after passing through the combustion stabilizing cover, the combustion-supporting air is changed into rotational flow air from direct flow air. The ultra-low nitrogen gas burner can achieve balanced combustion, reduce the yield of nitrogen oxides and meet the requirements of energy conservation and environmental protection.

The invention belongs to the field of kiln, and provides a u-shaped internal-combustion rotating limekiln capable of recovering CO2. The limekiln is characterized in that the rotary kiln is horizontal, a u-shaped muffle heating furnace and a u-shaped calcining chamber are adjacently arranged inside the rotary kiln, blades are arranged on the inner wall of the muffle heating furnace and the inner wall of the calcining chamber, and a carbon dioxide collector is arranged through a limestone feeding inlet to communicate with the calcining chamber. Compared with present muffle rotary limekilns, the u-shaped internal-combustion rotating limekiln capable of recovering CO2 has significant advantages of reasonable structure, energy conservation, and emission reduction, and can recover and utilize materials and improve product quality.

The invention discloses a multivariable cooperative control method for a double-hearth circulating fluidized bed unit, belongs to a multivariable system for constructing a circulating fluidized bedboiler and a turbo-set, and adopts a multivariable constraint DMC algorithm based on tracking error gradient. The adopted algorithm makes improvement on the traditional DMC algorithm, specifically, the tracking error gradient is introduced in an objective function, so that the tracking effect for the set value is improved, and constraint is attached to input and output, so that the controlled variable of a solution is within the physical scope. According to the invention, as the bed temperature and the bed pressure of hearths on left and right sides are considered simultaneously, during variable working condition regulation, the load tracking capacity is guaranteed, and the bed temperature and bed pressure of the two hearths are balanced and stable, and balanced combustion is realized.

The invention relates to a process of drying-grinding by using vertical roller mill, belonging to fluidizing roasting technique. It comprises following steps: coarse crushing, middle crushing coal and ore exploited from well, conveying crushed coal and ore to high-pressure vertical grinding roller through belt conveyer for drying grinding; the high-pressure vertical grinding roller drying coal and ore by using hot wind got from cyclic induced draft fan, the water content of dried ore is less than 2%; dried grinding coal and core in vertical grinding roller, classifying grinded material, discharging qualified material, feeding it into cyclone dust collector; returning unqualified material into roller for grinding; discharging cyanide leached hot calcine from discharge port of boiling calcining furnace. The invention is characterized by simplified process, saved area and investment, good coal distribution, homogenous burning, good baking effect in equilibrium temperature furnace, increased leaching ratio for goal materials and adequate utilization of excess heat resources.

The invention discloses a unit modular large household refuse incineration furnace and relates to household refuse incineration treatment equipment. The unit modular large household refuse incineration furnace comprises an incineration grate mechanism, air chambers and air supply systems, wherein the incineration grate mechanism comprises a drying section grate, a burning section grate, a burnout section grate and a rack; the drying section grate, the burning section grate and the burnout section grate respectively comprise two groups of grate units; each group of grate units comprises a spindle, a partition plate, a front wall plate, a rear wall plate and a grate with stepped drop; each grate comprises two groups of edge modules and at least one group of middle modules; each edge module and each middle module respectively consist of a plurality of grate sheets; each group of edge modules is fixed on the corresponding rack through a sidewall protection plate device; each air chamber is formed below each middle module and each edge module; an air inlet is formed at the lower end of each air chamber and connected with the corresponding air supply system; and each air supply system comprises a drying section air supply system, a burning section air supply system and a burnout section air supply system. The unit modular large household refuse incineration furnace is stable in operation, low in energy consumption and long in service life.

The invention relates to a pre-mixing and pre-evaporation low-pollution combustion chamber with a double-oil-way four-rotational-flow pre-film type main combustion stage. The combustion chamber is of a single-ring-cavity structure, and adopts a central staged combustion mode, wherein the head of the combustion chamber is divided into a preliminary combustion stage and a main combustion stage, the preliminary combustion stage adopts a mode of combining diffusive combustion with rotational-flow pre-mixing combustion, and is capable of reducing pollutant discharge under low-flow working conditions while ensuring combustion stability; the main combustion stage adopts a mode of pre-mixing and pre-evaporation combustion, and is capable of effectively reducing combustion pollutants. The oil way of the main combustion stage is divided into two stages, fuel oil in each stage forms an oil film on a pre-film plate, and the oil films are atomized, evaporated and blended under the action of two rotational flows to form a uniform oil-gas mixture, thus facilitating reduction for the combustion pollutants; due to the double-oil-way design, the one-stage working of the main combustion stage under low-flow and medium-flow working conditions such as entrance, and the two-stage working of the main combustion stage under high-flow working conditions such as take-off can be met, thus facilitating the oil-gas matching of the combustion chamber under different working conditions, and further reducing the pollutant discharge level of the whole landing and take-off circulation of the combustion chamber of an aeroengine.

The invention discloses a combustion control system for a power plant. The combustion control system comprises a data acquisition part, a control part and an execution part. The data acquisition partcomprises a sound wave temperature measurement system and a DCS data acquisition system. The control part comprises a neural network model module, an evaluator and an optimizer. The execution part comprises a secondary air door opening degree adjusting device. The invention further discloses a combustion control method for the power plant. According to the system and the method, a neural network is adopted to construct a model, and extremely high universality and transportability are achieved. According to the system and the method, stable, long-term and manual intervention-free combustion canbe achieved for the power plant, and the purposes of reducing coal consumption and NOx and CO emissions as much as possible, reducing the combustion temperature of a hearth, uniform combusting and reducing the smoke temperature under the condition of a given load can be achieved.

The invention provides a method for controlling pulse combustion of multiple burners of a fuel gas furnace. According to the method, the differential value between a set temperature and the actual temperature inside the fuel gas furnace is calculated through a controller, a temperature difference signal is calculated through a PID, is converted into a multi-time-sequence variable pulse signal by combining the maximum work period of working of the burners, and is output as a control signal, the multi-time-sequence variable pulse signal controls the opening and closing states of an air valve and a fuel gas valve according to different heating modes and controls the work period of the burner controller. The method enables the burners to burn according to a certain rule, thereby effectively controlling the combustion temperature, guaranteeing temperature uniformity inside the fuel gas furnace and improving combustion efficiency.

Methods are described for manufacturing silica-based glass, in which silica precursor material is supplied to a synthesis flame in the form of an emulsion. The methods involve the steps of: forming an emulsion of an aqueous phase in a non-aqueous liquid silica precursor material; supplying the emulsion as a spray of droplets into a synthesis flame, whereby the precursor material is converted in the flame into a silica-containing soot; and collecting the soot on a substrate, either as a porous soot body for subsequent consolidation to glass or directly as a substantially pore-free glass.

The invention discloses a modified grate furnace waste incineration device. An air vent is formed in the rear arch of a hearth of a waste incineration furnace, is connected with the air chamber of a fire grate at the drying section of an incinerator through a pipeline, and is also connected with an outlet flue of the hearth of the incinerator through the pipeline; the coal economizer outlet of a waste heat boiler joins the pipeline connected with the air vent of the rear arch of the hearth through the pipeline; a circulating fan is further arranged on the pipeline; an air conditioning bypass is arranged at the inlet of the circulating fan. According to the invention, partial hot smoke containing certain content of oxygen at the tail part of the hearth and the partial hot smoke at the outlet of the coal economizer are recycled, so that drying and preheating of waste and disturbance and combustion support of smoke are met, the fed combustion air amount and the total smoke amount can be effectively reduced, the oxygen content of a combustion area is reasonably controlled, improvement of the waste combustion quality is facilitated, improvement of the utilization efficiency of combustion thermal energy is also facilitated, and the content of pollutants in the discharged flue gas is decreased.

The invention relates to a fuel oil additive, in particular to a fuel oil additive which can be added into gasoline and diesel. The fuel oil additive consists of the following raw materials by weight percentage: 2 to 3 percent of octanol, 10 to 13 percent of isopropyl alcohol, 1.5 to 3.5 percent of nitrobenzene, 1.5 to 3.5 percent of methenamine, 0.3 to 0.5 percent of ferrocene, and the rest is methyl alcohol. The fuel oil additive of the invention adopts the liquid phase catalysis technology to promote the catalysis and cracking of the fuel oil, and enhance the physical activity, thereby causing the combustion to be more full, even and thorough. The fuel oil additive of the invention has the following functions of: 1. saving the fuel oil; 2. eliminating carbon in exhaust gases; and 3. reducing exhaust gas discharge to satisfy the European III standard.

The invention discloses a thermal desorption device for soil restoration. The thermal desorption device comprises a hot oil heating furnace unit and a thermal desorption unit. A heat absorption spiralpipe is arranged in the hot oil heating furnace unit. A heat release spiral pipe is arranged in the thermal desorption unit. The hot oil outlet end of the heat absorption spiral pipe is connected with the hot oil inlet end of the heat release spiral pipe through a first oil guide pipe in a communicating mode. The cold oil outlet end of the heat release spiral pipe is connected with the oil inletend of the heat absorption spiral pipe through a second oil guide pipe in a communicating mode. A circulation pump is arranged on the second oil guide pipe. The thermal desorption device is simple instructure, combustion in a furnace cavity is even, meanwhile, the heat release spiral pipe is adopted for heating a soil source stably and evenly, temperature control is convenient, and the mode thatflames are directly adopted for intense high-temperature heating on the soil source in the soil thermal desorption cavity is avoided.