65 results about "Soot deposition" patented technology

A method is described for controlling the soot deposition on sensors. A sensor element is provided, which includes a first electrode and a second electrode. Different measuring voltages U₁ and U₂ can be applied to the sensor element. During a first time period t₁, the sensor element is operated at a higher voltage U₁ until a triggering threshold AP of the sensor element is exceeded, while it is operated at a voltage U₂, which is different from higher voltage U₁, U₂ being lower than voltage U₁, during a second time period t₂.

As a precursor to forming a glass sheet, a soot layer is formed on a deposition surface using a roll-to-roll glass soot deposition process. A soot layer-separating device is configured to bring a stream of gas into contact with at least a portion of a free surface of the soot layer. The impinging gas stream affects local thermal expansion stresses at the soot layer/deposition surface interface, which separates the soot layer from the deposition surface.

Method of making a microstructured optical fiber. Silica glass based soot is deposited on a substrate to form at least a portion of an optical fiber preform by traversing a soot deposition burner with respect to said substrate at a burner traverse rate greater than 3 cm/sec, thereby depositing a layer of soot having a thickness less than 20 microns for each of a plurality of burner passes. At least a portion of the soot preform is then consolidated inside a furnace to remove greater than 50 percent of the air trapped in said soot preform, said consolidating taking place in a gaseous atmosphere containing krypton, nitrogen, or mixtures thereof under conditions which are effective to trap a portion of said gaseous atmosphere in said preform during said consolidation step, thereby forming a consolidated preform which when viewed in cross section will exhibit at least 50 voids therein.

The specification describes a VAD method for producing optical fiber preforms by depositing soot onto a solid core rod. The solid core rod preferably has a uniform composition, doped or undoped, suitable for the center core region of the preform. The primary cladding layer, and additional cladding layers if desired, are produced by depositing soot on the center core rod. The surface of the center core rod is treated with an etchant torch that traverses the center core rod in front of the soot deposition torch. This produces a clean interface between the core and primary cladding. This soot-on-center-core-rod method allows the production of sharp index profiles by reducing the diffusion of dopants into and out of the center core portion of the preform that occurs in soot-on-soot processes.

Methods and apparatus relate to optical fibers suitable for use in sensing applications exposed to radiation environments. The fibers include a core of pure silica or chlorine doped silica surrounded by a fluorinated silica cladding. These glasses for the core and cladding utilize dopants that resist radiation-induced attenuation. A two step process for forming the cladding can achieve necessary concentrations of the fluorine by performing a soot deposition process in a different environment from a consolidation process where the soot is sintered into a glass. Concentration of fluorine doped into the cladding layer enables obtaining a numerical aperture that confines a mono-mode of the fiber to resist bend-induced attenuation. Dimensions of the fiber further facilitate bending ability of the fiber.

A burner arrangement for a combustor of a gas turbine engine including a burner body is provided. The burner arrangement includes a cut-out and a burner face, the cut-out piercing the burner face, a sensor device installed in the cut-out and a first part fixed to the burner body and a second part having a tip surface, the sensor device being configured such that the second part is able to move relative to the burner face, and further including a data evaluation unit. The sensor device generates information signals corresponding to a magnitude and/or a period of the oscillation of the second part relative to the first part, the data evaluation unit collects the received information signals and determines a grade of deposition of combustion residues on the burner face by evaluating the collected information signals.

The invention relates to a device and method for jointly treating antimony-smelting arsenic soda slag through a pyrogenic process and a wet process. The device comprises a pretreatment unit, an arsenic pyrogenic process volatilization unit and a wet process deep arsenic removing unit; the pretreatment unit comprises a breaking machine, a fine grinding device, a mixing device and a pelletizing machine which are sequentially connected; the arsenic pyrogenic process volatilization unit comprises an arsenic volatilization furnace, a soot deposition chamber, a surface cooling device and a bag collector which are sequentially connected; the wet process deep arsenic removing unit comprises a breaking machine, a fine grinding device, a leaching reaction tank, a centrifuge, a deep arsenic removal reaction tank and a filter press which are sequentially connected; the pelletizing machine is connected with a feeding port of the arsenic volatilization furnace; an air outlet of the arsenic volatilization furnace is connected with the soot deposition chamber; and a discharging port of the arsenic volatilization furnace is connected to the breaking machine in the wet process deep arsenic removingunit. The invention also discloses the method for jointly treating the antimony-smelting arsenic soda slag through the pyrogenic process and the wet process. The device is simple, control is easy andconvenient, and the processing capability is strong; and by means of the method, the arsenic and antimony volatilization rate is high, cost is low, and the method is suitable for industrial production.

A plurality of glass particles synthesizing burners are arranged at a predetermined burner interval opposite to a rotating starting rod. The starting rod and the glass particles synthesizing burners are relatively parallely reciprocally moved, and the soot deposition is conducted. A reciprocating speed v(mm/minute), axis rotating speed r (rpm), and burner interval L (mm) are set so that a value A expressed by the expression A=(r/v)×L is in a range 40≧A≧8.

Provided is a manufacturing apparatus for manufacturing a soot deposition body, including a main burner that deposits glass microparticles on a target rod while moving parallel to a longitudinal direction of the target rod; and a side burner that is positioned outside of a movement range of the main burner in a movement direction of the main burner, and fires an end portion of the soot depositionbody formed on the target rod. The side burner includes a plurality of heating burners arranged distanced from each other in a circumferential direction of the target rod. In the manufacturing apparatus described above, the main burner may include a plurality of deposition burners that are arranged distanced from each other in the circumferential direction of the target rod. The manufacturing apparatus improves yield of the soot deposition body.

The invention discloses a boiler soot blowing optimization method based on heating surface health state prediction. The boiler soot blowing optimization method is characterized in that drum-type prediction for characteristic change of cleaning factors of a soot deposition section in a single soot blowing period is achieved through a filtering algorithm, a functional expression is acquired, a unitminimum heat transfer energy consumption soot blowing optimization model in the single soot blowing period is utilized, and a single soot blowing optimization strategy at the optimal soot blowing timepoint in the single soot blowing period is acquired. According to the boiler soot blowing optimization method, the problem that making of the soot blowing optimization strategy based on big data is inaccurate on single soot blowing operation is solved, and with a 300-MW coal-fired power plant boiler adopted as an example, the boiler soot blowing optimization method has relatively good economy andscientificity and has a guiding function for soot blowing strategy making of a coal-fired power plant.

Light scattering inorganic substrates and articles comprising soot particles and methods for making light scattering inorganic substrates and articles comprising soot particles useful for, for example, photovoltaic cells. The method for making the substrates and articles comprises providing an inorganic substrate comprising at least one surface, applying soot particles pyrogenically to the at least one surface of the inorganic substrate to form a coated substrate, and heating the soot particles to form the light scattering inorganic substrate. The invention creates a scattering glass surface that is suitable for subsequent deposition of a TCO and a thin film silicon photovoltaic device structure. The scattering properties may be controlled by the combination of substrate glass and soot composition, deposition conditions, patterning of the soot, and/or sintering conditions.

The invention relates to the field of waste incineration, in particular to an arrangement structure and arrangement method for a soot removal device suitable for a waste incineration boiler. Accordingto the arrangement structure and arrangement method, the waste incineration boiler is divided into different areas according to the medium temperature of each heating surface of the waste incineration boiler, the temperature of flue gas flowing through the heating surfaces and the factors of forming coking soot deposition, and soot removal devices with a reasonable types are arranged in the areas; and the areas are characterized in that a boiler wall soot blower and a pulse shock wave soot blower are arranged in a cavity flue formed by a water cooling wall, a pulse shock wave soot blower is additionally arranged at the evaporation heating surface with the flue gas temperature of 600 DEG C or more and is arranged at the front part of a superheater, a steam soot blower is additionally arranged on the heating surface of the superheater with the flue gas temperature of 400 DEG C or more, and a pulse shock wave soot blower is additionally arranged on the convection heating surface with theflue gas temperature of 400 DEG C or less and is arranged at the rear part of the superheater.

The invention relates to a rotary soot blower device and a soot blower method for improving the uniformity of a denitrification inlet flue flow field, and belongs to the technical field of coal-firedpower plant flue soot deposition prevention. The rotary soot blower device comprises a compressed air mother pipe, a compressed air branch pipe, a pressure gage and a rotary soot blowing air cap, wherein the compressed air mother pipe communicates with a house-service compressed air pipeline; the compressed air branch pipe communicates with the compressed air mother pipe; the rotary soot blowing air cap communicates to the compressed air branch pipe; the pressure gage is arranged on the compressed air branch pipe; the pressure gage and the rotary soot blowing air cap are sequentially arrangedalong a compressed air flowing direction; the rotary soot blowing air cap is arranged in a flue; a flow guiding plate is arranged in the flue and is connected with a downstream flue; and the flue, theflow guiding plate and the downstream flue are sequentially arranged along a flue gas flowing direction. According to the rotary soot blower device and the soot blower method for improving the uniformity of the denitrification inlet flue flow field provided by the invention, a largen umber of manpower and time spent on clearing soot deposition during machine halt every time due to severe soot deposition are saved, and the flue leakage caused by long-time erosion of a conventional soot blower is avoided.

Disclosed is a method for fabricating an optical fiber preform. The method includes: (a) growing a first soot preform on a starting member along a lengthwise direction of the starting member by a soot deposition; (b) dehydrating the first soot preform; (c) sintering the dehydrated first soot preform, to obtain a first glassed optical preform; and (d) elongating the first optical fiber preform by heating the first optical fiber with a heat source that excludes hydrogen, wherein the first glassed optical fiber is elongated by means of only a heat source that excludes the use of hydrogen.