Abstract:
A method of assembling an injection device for use in a reactor injector feed assembly includes extending the injection device at least partially into a cavity. The injection device includes a plurality of substantially concentric conduits coupled to a modular tip that includes a plurality of cooling channels and a plurality of substantially annular nozzles defined therein. The method also includes coupling at least one coolant distribution device in flow communication with the plurality of cooling channels to facilitate removing heat from an outer surface of the injection device.
Abstract:
A biomass-mixed, pulverized coal-fired burner is provided. The biomass-mixed, pulverized coal-fired burner is capable of burning biomass fuel as auxiliary fuel in large quantities and burning only pulverized coal when the biomass fuel is not sufficiently available. The biomass-mixed, pulverized coal-fired burner includes: a biomass fuel jet nozzle that extends axially along the biomass-mixed, pulverized coal-fired burner; a pulverized coal fuel jet nozzle that surrounds the biomass fuel jet nozzle; a secondary air nozzle that surrounds the pulverized coal fuel jet nozzle; and a tertiary air nozzle that surrounds the secondary air nozzle. A biomass fuel stream is jetted into an inside of a pulverized coal fuel flame formed in a furnace, the flame offering favorable ignition and flame holding performance.
Abstract:
The present invention relates to a cylindrical non-melt and partial melt type entrained flow bed gasifier with one or more burners mounted on the top thereof for supplying pulverized raw coal and oxidizer thereto, wherein each of the burners comprises three or four pipes so as to form a central supplying line for injecting the pulverized coal with a carrier gas into the gasifier, a primary oxidizer annular region around the central supplying line having a plurality of primary oxidizer supplying bores for injecting primary oxidizer vertically or at an angle to the injection region of the pulverized coal supplied through the central supplying line so as to direct the pulverized coal to the central region, and an outer cooling annular region around the primary oxidizer annular region for flowing cooling water, which is operated preferably at a temperature range of 1,250˜1,450° C., or of 1,150˜1,500° C. according to the properties of the coal. According to the present invention, the pulverized coal and oxidizer are properly mixed, and the pulverized coal is directed towards the middle of the gasifier, so that the reaction is completed with the ash being wholly non-melted or partially melted.
Abstract:
A method of assembling an injection device for use in a reactor injector feed assembly includes extending the injection device at least partially into a cavity. The injection device includes a plurality of substantially concentric conduits coupled to a modular tip that includes a plurality of cooling channels and a plurality of substantially annular nozzles defined therein. The method also includes coupling at least one coolant distribution device in flow communication with the plurality of cooling channels to facilitate removing heat from an outer surface of the injection device.
Abstract:
Provided is a combustion burner including: a fuel nozzle (51) that is able to blow a fuel gas obtained by mixing pulverized coal with primary air; a secondary air nozzle (52) that is able to blow secondary air from the outside of the fuel nozzle (51); a flame stabilizer (54) that is provided at a front end portion of the fuel nozzle (51) so as to be near the axis center; and a rectification member (55) that is provided between the inner wall surface of the fuel nozzle (51) and the flame stabilizer (54), wherein an appropriate flow of a fuel gas obtained by mixing solid fuel with air may be realized.
Abstract:
A feed injector system includes an injector nozzle. The injector nozzle includes a first injector port assembly having a first injector port located at a center of a longitudinal axis of the injector nozzle and defining a flow path for directing a first feed flow from a respective source into a reaction zone. The feed injector system also includes a second injector port assembly having one or more second injector passages arranged about a first circumference of the first injector port for receiving and injecting a second feed flow. Further, the feed injector system includes a third injector port assembly having a plurality of third ports arranged about a second circumference of the first injector port. The third ports are communicatively coupled to a plurality of toroidal flow paths and configured to receive and inject a third feed flow.
Abstract:
Disclosed is a burner for oxidant gasification of pulverized fuels under high pressures, e.g. 80 bar, and temperatures, e.g. 1200 to 1900° C., in reactors with liquid slag removal for oxygen gasification. The individual pulverized coal supply tubes in the burner are inclined toward the burner axis in the direction of the burner mouth, are implemented equiareally from the burner inlet up to the burner outlet, and end at the burner mouth adjacent to the oxidant outlet. Owing to the pulverized fuel feeding elements being implemented right up to the burner mouth and the instantaneous entry of the pulverized coal into the rotating oxygen stream there is no longer any areal discontinuity at the dust outlet, since here the pulverized coal stream is immediately sucked into the oxidant stream. At the outlet of the media the individual pulverized coal streams merge into a single rotating pulverized coal/oxygen stream, thereby achieving an even flame spread and stabilization.
Abstract:
A method of assembling an injection device for use in a reactor injector feed assembly includes extending the injection device at least partially into a cavity. The injection device includes a plurality of substantially concentric conduits coupled to a modular tip that includes a plurality of cooling channels and a plurality of substantially annular nozzles defined therein. The method also includes coupling at least one coolant distribution device in flow communication with the plurality of cooling channels to facilitate removing heat from an outer surface of the injection device.
Abstract:
Disclosed herein is an apparatus and method of constructing a stationary wear-resistant stationary nozzle 200 and/or nozzle liner 230 for solid fueled furnaces. A transition section 210 is constructed from several flat pieces 211-218 several that may have identical starting shapes. This reduces manufacturing complexity and costs. All pieces 211-218 have a high-wear weld overlay on their inner surface 316, 416. Corner pieces 215-218 are folded into a corner shape at an outlet edge 412 and rolled into a curved shape at an inlet edge 411. Horizontal 211, 212 and vertical pieces 213, 214 are only rolled at an inlet edge 311. The pieces have seam tab 240 along longitudinal edges that are welded together to construct a transition section 210. The transition section 210 may be used as a liner to reduce wear in an existing stationary nozzle or may be constructed to be connected to an inlet piece 220 to form a strong, wear-resistant coal nozzle 200.
Abstract:
A method for decreasing nitrogen oxides of a pulverized coal boiler using burners (2) of internal combustion type comprising: designing or changing all or part of burners of the pulverized coal boiler as internal combustion type burners (2), in which the ignition sources may be plasma generators (1) or ignition devices such as small oil guns etc., and the power thereof can be adjusted for controlling the ignition intensity in the burners (2). The burners (2) are interiorly divided into several stage combustion chambers (5) and are provided with pulverized coal concentrators (4) which do deep fuel staging in the burners (2). During the operation of the boiler, the ignition sources always keep in a working state, and the pulverized coal in the burners (2) is ignited stage by stage and is burnt in advance; decreasing the secondary air amount in the primary combustion zone (22) so that the primary combustion zone (22) is in a relatively strong reducing atmosphere and a high temperature and oxygen-deficient condition for inhibiting the generation of NOx is created; and supplying the remaining air from the upper of furnace of the boiler in the form of over-fire air, so that a deep air staging is carried out in the total furnace. Thus, the NOx generation of combustion can be effectively controlled on the premise of not decreasing the boiler efficiency.