摘要:
A tube heat exchanger having a substantially cylindrical housing, a pair of adjacent cylindrical headers disposed in the housing, and a multiplicity of downwardly extending U-shaped heat exchanger tubes connecting the headers to one another, one of the headers being an inlet header and the other thereof being an outlet header, both of the headers being connectible to pressurized water lines of a pressurized water nuclear reactor, includes a feedwater supply connected to the housing below the outlet header for supplying a quantity of feedwater into the housing up to a given level partly filling the housing during operation of the heat exchanger, the heat exchanger tubes extending upwardly from the outlet header above the given feedwater level and being formed with a U-shaped bend located above the given level.
摘要:
Feedwater preheater installable horizontally within a turbine exhaust steam housing for heating feedwater by means of condensing bleeder steam from the turbine, includes inlet and outlet chambers for the feedwater both located at one side of the preheater, an outer steam chamber adjacent the inlet and outlet chambers, an inner steam chamber disposed within the outer steam chamber, means for supplying the bleeder steam at different pressures to the respective steam chambers, a water chamber closed in itself partially defining the inner steam chamber, a plurality of feedwater conducting tubes communicating with the feedwater inlet chamber and disposed in the outer steam chamber, the tubes having a substantially 180.degree. bend formed therein at a location of the outer steam chamber remote from the feedwater inlet chamber and communicating at the bend thereof with the water chamber, and a plurality of additional tubes disposed in the inner steam chamber and communicating at one end thereof with said water chamber and at the other end thereof with said outlet chamber.
摘要:
A heating chamber or low-temperature carbonization drum has an interior receiving bulk material or trash and has a longitudinal axis about which the heating chamber or drum is rotatable. A number of heating tubes through which a heating gas can flow in a given direction, are disposed in the interior of the heating chamber or drum, are oriented approximately parallel to one another, and have an end region as seen in the given flow direction. Turbulators are disposed inside the heating tubes in the end region.
摘要:
Feedwater preheater having a multiplicity of tubes conducting feedwater, in combination with a device for separating moisture from moisture-bearing steam, includes structural components disposed transversely to a steam flow toward the heating tubes in vicinity of a steam inlet to the preheater, the structural components being in the form of a plurality of rod-shaped rows of profile members disposed between respective tubes of the feedwater preheater and the steam inlet, adjacent rods of the rows of profile members being spaced from one another, the spaces therebetween being mutually offset from one row of profile members to another in direction toward the tubes of the feedwater preheater.
摘要:
A carbonization apparatus for carbonizing material which includes metal parts, as for instance waste material with elongated metal parts, such as metal wires and metal bands. A residue discharge pipe has a discharge port formed in an end face thereof. Carbonization residue is discharged through the discharge port. The residue discharge pipe rotates about its longitudinal axis. The metal parts are entrained with a device which is disposed in a region of the discharge port and which rotates with the residue discharge pipe. In the alternative, the entrainment device or devices are disposed inside a carbonization drum. A stationary bar-shaped member cooperates with the entraining device to tear the metal parts discharging from the discharge opening.
摘要:
A combustion chamber for combusting a substance includes a burner and at least three successively disposed parts including a primary chamber, a secondary chamber and an ash discharge chamber. The burner is associated with and conducts a first air flow to the primary chamber. The primary chamber has an inlet for conducting a second air flow for substoichiometric combustion of a substance to be combusted at a temperature below an ash softening point and without clinker flow. The secondary chamber has an inlet for conducting a third air flow for brief, intensive, complete combustion of the substance discharged from the primary chamber with clinker flow, and the secondary chamber has walls and a material lining the walls being resistant to fluid clinker. A process for combusting a substance being at least partially formed of combustible material includes feeding an air flow to the substance for substoichiometrically combusting the substance at a temperature below an ash softening point without clinker flow but with formation of a residue, and subsequently admixing a further air flow with the residue of the substoichiometric combustion for completely combusting the residue and forming flue gas and flowing ash. Prepared pyrolysis residue and incompletely burned gas may be discharged from a pyrolysis reactor as the at least partially combustible material made by low-temperature carbonization of trash in a system for thermal trash disposal.
摘要:
Feedwater preheater for heating feedwater in the form of steam turbine condensate by means of condensing extraction steam from a turbine, includes a casing, a fixed tube plate and a movable tube plate disposed opposite one another in the casing, feedwater inlet and outlet chambers located adjacent the fixed tube plate, a feedwater reversing chamber disposed in the casing and partly defined by the movable tube plate, a first group of feedwater conducting tubes connected at one end thereof through the fixed tube plate to the feedwater inlet chamber and at the other end through the movable tube plate to the reversing chamber, a second group of tubes connected at one end thereof through the movable tube plate to the reversing chamber and at the other end thereof through the fixed tube plate to the feedwater outlet chamber, a steam vessel disposed in the casing and surrounding the second group of tubes, the first group of tubes, on the one hand, and the second group of tubes, on the other hand, being mutually spaced apart a distance so great that stresses produced by varying thermal expansion of the tubes which, in turn, produce a tipping movement and deformation of the movable tube plate do not exceed a permissible value.
摘要:
A method for processing waste includes low-temperature carbonizing one portion of the waste creating low-temperature carbonization gas and low-temperature carbonization residue. A carbon-rich fraction is separated off from the low-temperature carbonization residue. At least some of the carbon-rich fraction of the low-temperature carbonization residue is supplied as fuel for a support flame for burning another portion of the waste. A plant for processing waste includes a revolving tubular kiln in which a burner is disposed. A low-temperature carbonization drum has an outlet side communicating with a low-temperature carbonization gas line and a separator device for solid low-temperature carbonization residue. A line carries a carbon-rich fraction of the low-temperature carbonization residue from the separator device to the burner.
摘要:
A heating chamber for solid material, preferably a low-temperature carbonization drum for waste, is rotatable about its longitudinal axis and is equipped with a number of heating tubes that are disposed in an interior space and are aligned approximately parallel to one another. In order to ensure that only fine material can collect between the heating tubes and the inner wall surface of the heating chamber, the heating tubes, as viewed in cross-section, are disposed in a virtually closed row along the wall. Dummy tubes which are preferably easy to remove and preferably have the same diameter as the heating tubes, are located in this row, which may be circular.
摘要:
A waste conveyor includes a conveyor channel. A feed shaft is connected to the conveyor channel. A worm is disposed in the longitudinal direction of the conveyor channel. The worm has a shaft with an axis. A first metal cutter is disposed at an edge of a portion of the worm and is curved relative to the axis of the shaft. A second metal cutter is disposed at a portion of the conveyor channel, is curved relative to the axis of the shaft and has a radius of curvature being greater than the radius of curvature of the first metal cutter. The two metal cutters are disposed side by side and approximately concentric to the shaft, at a predetermined rotary position of the worm.