摘要:
A cleaning kit for removing process impurities carried on the surface of a NO.sub.x reduction catalyst which is installed in the path of a flue gas flow exiting from a fossil fuel burning facility including: a reagent supply grill; a source of supply of liquid cleaning reagent; a reagent collection basin; and a recirculating structure. The reagent supply grid is adapted to be selectively positioned above a portion of a catalyst layer. The source of supply of liquid cleaning reagent adapted to be in communication with the supply grid, and the reagent collection basin being adapted to be selectively positioned below the portion of such catalyst layer to catch cleaning reagent therein after such reagent passes through such portion of the catalyst layer, the recirculating structure recirculates at least a portion of such reagent from the collecting basin for recirculating through such supply grid for further cleaning of such portion of the catalyst layer.
摘要:
A method for control of a drive for a tool or workpiece uses pilot control and a device with a control apparatus, the pilot control taking place depending on a frequency of movement which corresponds to a reference variable. In this way, a contouring error can be advantageously reduced.
摘要:
A block piece for holding an optical lens to be worked in a machine tool, the block piece having a rotational axis 1.1, a holding surface that can be made to face the lens and a bearing surface that is directed radially outwards and can be brought to bear in a workpiece spindle, wherein the holding surface has at least one recess 1.2a or a number of recesses 2.1-2.6, which are distributed around the rotational axis 1.1, have a diameter DA and serve for receiving bonding compound for adhesive bonding to the lens.
摘要:
A polishing machine for lenses with at least one first polishing spindle having a polishing axis (K) and a tool holder disposed on the first polishing spindle for a first polishing disc designed as a tool, further comprising at least one first workpiece spindle having a rotary axis (C) and a workpiece holder disposed on the first workpiece spindle for a lens, wherein the workpiece holder and the tool holder are disposed so as to be movable in translation in the direction of a telescoping axis (Z) disposed parallel to the polishing axis (K) and in the direction of a translation axis (X) disposed at right angles to the rotary axis (C). The polishing machine further has at least one first tool changer for changing the tool and a working chamber formed of at least one wall spatially limiting a spray of polishing medium during processing, wherein at least the workpiece holder and the tool holder are disposed within the working chamber, wherein the first tool changer is disposed at least partially within the working chamber during operation.
摘要:
A method for determining a deviation of at least one regulating variable on chip removal machines with a mechanical drive for a tool and/or a workpiece, regulated by a control system, wherein the regulation comprises a plurality of values of at least three spatial axes for the control system and for the drive, and the values have a functional relation with the axes. A protocol is prepared from a plurality of control system actual values detected by measuring devices and/or selected drive actual values and a control system nominal value and/or a drive nominal value is calculated at least in relation to an axis, and a control system differential value and/or a drive differential value is calculated at least in relation to the axis. A chip removal machine which implements such a method is disclosed.
摘要:
An excavation pit lining consisting of a slit wall of a hardening single-phase slit wall material with an exposed surface on the pit side, and also of vertical support elements placed at a distance in the single-phase slit wall material, whereby the slit wall forms a panel wall between the support elements and where the single-phase slit wall material has at least one water-retentive, lightweight aggregate.
摘要:
Disclosed is a method for modifying the chain length and double bond positional specificities of a soluble plant fatty acid desaturase. More specifically, the method involves modifying amino acid contact residues in the substrate binding channel of the soluble fatty acid desaturase which contact the fatty acid. Specifically disclosed is the modification of an acyl-ACP desaturase. Amino acid contact residues which lie within the substrate binding channel are identified, and subsequently replaced with different residues to effect the modification of activity.
摘要:
The invention pertains to an excavation pit lining consisting of a slit wall of a hardening single-phase slit wall material with an exposed surface on the pit side, and also of vertical support elements placed at a distance in the single-phase slit wall material, whereby the slit wall forms a panel wall between the support elements and where the single-phase slit wall material has at least one water-retentive, lightweight aggregate.