摘要:
A method for removing electrostatically charged particles that are difficult to separate from a gas flow within one or more high-voltage fields, wherein only one high-voltage supply source is used for these high-voltage fields. The flows to be cleaned are successively ionized in an ionizing region and the particles are separated in a separating region within the one or more high-voltage fields, wherein the field strength of the ionizing region is weaker than the field strength of the separating region.
摘要:
A regenerative heat-exchanger is disclosed which has a rotor mounted in an enclosing housing, with separation zones radially disposed between the heat exchange media and configured as peripheral and radial barrier chambers, and stationary peripheral and radial seals which are arranged on hot and cold sides of the rotor.
摘要:
A method of and an apparatus for removing radionuclides from a radioactively contaminated liquid, especially water from the sump of a nuclear electric-power generating plant, in which the waste water is evaporated to produce a vapor phase containing radionuclides in the form of liquid or solid aerosol-dispersed particles which are collected by passing the vapor through an electric field. Preferably a plurality of such fields are traversed in succession by the aerosol.
摘要:
A horizontal-flow electrostatic filter for gas passing from a boiler to a chimney and having separate flow chambers lying horizontally side-by-side has inlet and outlet ducting arranged such that flue gases are divided to flow in opposite directions through the respective chambers, both directions of flow being at right angles to the direction of the shortest distance between the boiler house and the chimney. The flue gas output of the boiler is divided equally between the chambers. The size and hence capacity of the filter may be greater, in this disposition, for a given said distance than if a prior art parallel co-current flow arrangement (shown in FIG. 1 of the drawings) were used. Capacity for a given available floor space is further assisted by providing a plurality of arrays of collection and discharge electrodes separately electrically supplied and controlled.
摘要:
A regenerative heat exchanger for gaseous media which are in a heat exchange with one another includes stationary or rotating storage masses and at least one cleaning device for the storage masses, wherein the cleaning device can be pivoted in relation to the annular cross section of the storage masses from the inside toward the outside or vice versa. The regenerative heat exchanger can be used for the preheating of air as well as for the preheating of gas. The free end of a swivel arm of the cleaning device constructed as a blow tube has a bent portion which extends parallel to the plane of the storage masses and the bent portion is provided with at least two blow nozzles.
摘要:
A plant for the reduction of nitrogen oxide in furnace waste gases includes a furnace, a reactor serving for selective catalytic reduction, and a regenerative heat exchanger to be used for air preheaters as well as for gas preheaters for the treatment of pollutant-containing waste gases which are in a heat exchange with another medium. The regenerative heat exchanger has stationary or revolving storage masses which are composed at least partially of catalytic material. A reduction agent is supplied to the regenerative heat exchanger. The reactor is arranged concentrically above the regenerative heat exchanger. Preferably, the reactor is placed directly onto the housing of the heat exchanger.
摘要:
The overall effective volume of a horizontal gas flow electrostatic precipitator is divided into at least four electrostatic field units arranged in stages, there being at least upper and lower vertically aligned stages, the precipitator having a dust exit bunker which receives dust collected in each of the upper and lower stages. Below the collector electrodes of the upper stage are collection pockets which communicate with the dust exit bunker through downwardly extending dust passages located in the lower stage. These passages are internal passages within hollow collector electrodes of the lower stage. The electrostatic field units are, independently of one another, each connected to a respective separate controllable power supply means so that it is possible to generate, in each respective stage, a separate controllable high voltage. The power supply means in each stage are regulated so as to provide the required electrical characteristics, it being particularly preferred that the power supply means in each stage be self-regulating so as to automatically adjust the voltage in that stage to the desired value. Each stage is also provided with a separate rapper mechanism. Gas flow is preferably in opposite horizontal directions in vertically adjacent stages.
摘要:
A regenerative air preheater with cylindrical regenerator chamber and sealing frames at its axial ends with adjustable automatic thermal compensating devices for uniformly maintaining a constant sealing gap by adjustable means under different heat distortions of the regenerator chamber. The sealing frames are movable on spring-loaded pins and the axial travel of said frames is automatically equalized to the axial distortions of the regenerative chamber by said automatic thermal compensating devices in such a way, that they may follow the axial distortion movement of the regenerator chamber in a constant distance of a predetermined sealing gap, which had been adjusted, said compensating devices are controlled by their temperature-responsiveness, preferably in accordance with the mean temperature difference across the mass. As shown, they are made up by partially compensating thermal expansive devices, tied to a lever linkage with adjustable means.
摘要:
A method for a regenerative heat exchanger for the treatment of pollutant-containing waste gases which are in a heat exchange with another medium. The heat exchanger includes stationary or rotating storage masses which are at least partially of catalytic material and to which a reduction agent is supplied from the hot side thereof. A penetration of the reduction agent into the flue gas flow can be prevented by supplying the reduction agent directly to the catalyst separately from the pollutant-containing waste gases and without coming into contact with the remaining heating surfaces. For this purpose, a nozzle arrangement having at least one arm and extending over the entire radius of the heat exchanger may be arranged in both hood sides of the heat exchanger.
摘要:
An incineration plant includes a heat exchanger arranged in a flue gas flow following a reduction stage for nitrogen oxides and in front of a flue gas dust collector, and a heat transfer medium circuit for absorbing heat from the heat exchanger in the flue gas flow. The heat exchanger is connected to the heat transfer medium circuit such that the heat transfer medium conducted in the circuit is admitted to the heat exchanger. The heat transfer medium circuit has at least one additional heat exchanger for absorbing heat from the heat transfer medium. A feed water preheater is arranged in the heat transfer medium circuit.