摘要:
An apparatus for continuously producing wood pulp from wood shavings comprising a screw which rotates within a hollow cylinder. The hollow interior of the cylinder is divided into a pressure zone and a grinding and bleaching zone, the shavings being subjected to at least partially defibrillation under a high, continuously-increasing pressure in the pressure zone and then being simultaneously further defibrillated and bleached in the grinding and bleaching zone. The grinding and bleaching zone includes a plurality of pin planes, each plane being formed of at least three radially extending pins which project through the wall of the cylinder, the planes being spaced apart along the length of the screw. The pin planes provide a further pressure increase and produce a desired grinding and defibrillation effect, so that wood pulp is produced without damaging the material and a bleaching agent is simultaneously injected into the grinding and bleaching zone, is caused to be distributed thoroughly and uniformly through the fibers.A method for producing wood pulp in a screw press comprising the steps of feeding the shavings into the hollow interior of the cylinder which is divided into two zones, rotating the screw while at least minimizing the rotation of the shavings with the screw to cause the shavings to traverse the first zone so that the pressure acting on the shavings builds up and at least partial defibrillation of the shavings occurs, the shavings then entering the second zone in which they are simultaneously ground and bleached, the grinding being effected by pressing the shavings, by the rotation of the screw, against radially extending pins projecting through the cylinder to the base of the screw, the pins being located in a plurality of pin planes extending transversely to the longitudinal axis of the screw and at least three pins being provided in each plane and the bleaching being effected by injecting a bleaching or other treatment agent into the cylinder in the grinding and bleaching zone, and finally discharging the thus produced wood pulp from the cylinder.
摘要:
An extraction device for separating liquid from a liquid-solid mixture such as sludge or beet slices comprising a screw rotatably driveable in a barrel. The screw has a helical flight formed thereon defining a screw thread. The depth of the thread, in the axial direction of the screw, decreases in a direction opposite to the direction of conveyance of the material.A secondary helical flight formed on the screw defines a second thread for conveying extracted liquid in a direction to the direction of conveyance of the mixture. The two threads are adjacent one another. The second thread is closed at each of its ends, upstream, in the direction of conveyance of the mixture, of an outlet in the barrel for the solid components and downstream of an inlet for the mixture.
摘要:
A method and apparatus for sealing the drive end of a chamber for the preparation and hydrogenation of coal with hydrogen to form hydrocarbons in which the chamber comprises a hollow cylinder with a rotatable element therein having a conveying web thereon and in a sealing region a pressurized sealing substance such as coal particles mixed with oil is fed from a storage container through a feed passage into an annular recess at a pressure higher than that in the chamber so that the scaling substance passes through a conical annular gap which tapers towards the chamber. A further narrower gap on the drive side of the recess leads to a further annular recess from which the sealing substance can be extracted through a return pipe. Pressure comparison means control the feed pressure in the feed passage. The recesses and the annular gap can be provided by machining the rotatable element rather than the hollow cylinder and forward feed screw forms may be provided on the rotatable element in the sealing region.
摘要:
SZ twisting of stranding elements of electric or optical cables and lines is accomplished by means of twisting apparatus which consists of a twisting section defined by a first and a second twisting point within which at least one twisting head is arranged. The twisting head includes at least one deflection pulley or deflection roller which is stationary in the circumferential direction of the material to be twisted and with which the material to be twisted is in contact over part of the circumference. The axis of the deflection pulley or deflection roller is set at an angle to the axis of the tautly conducted material to be twisted. The inclination of this axis can be varied at intervals and the location of the deflection pulley or deflection roller relative to the material to be twisted can be changed at intervals. By setting the axis at an angle, a force component in the tangential direction which leads to a twisting of the material to be twisted, is exerted on the material to be twisted. The twisting head is designed so that the twisting takes place in always one direction, but with different magnitude at intervals. The super-position of two twists at the entrance and the exit of the twisting section leads to a resultant SZ twist.
摘要:
The invention relates to a food product cutting machine comprising a driven cutting knife, a receiving device for product to be cut, a height adjustment device for the receiving device by means of which a height position of product to be cut relative to the cutting knife is adjustable, a carriage displaceable relative to the cutting knife and having the receiving device arranged thereat, and a support device for product to be cut having at least one support element and being capable of supporting product to be cut on a support face as it is cut, wherein the support device for product to be cut is coupled with the height adjustment device, the position of the effective support face being predetermined by the height position of the receiving device.
摘要:
The present invention relates to novel compounds which inhibit urokinase-plasminogen activator (uPA), have a high bioavailability and can be administered orally, and to their use as therapeutic active substances for the treatment of disorders associated with urokinase and/or urokinase receptor, for example tumours and metastasis. The invention relates in particular to compounds containing oxadiazole groups.
摘要:
A method and a device determine a time response of a digital circuit. The time response is determined as a time difference between a data delay of a data path of the digital circuit, and a clock delay of a clock signal, which causes storage of a data item on the data path, taking into account a check. The check is determined dependent on a data slew of a signal on the data path and a clock slew of the clock signal in such a way that a positive time difference ensures the correct saving of the data item.
摘要:
Reactive dyes of formula (1): wherein R1, is optionally substituted C1-C4 alkyl, R2 is halogen, C1-C4 alkyl, C1-C4 alkoxy or sulfo, Z1 is a radical of formula —SO2—Y (2a), —CO—NH—(CH2)K—SO2—Y (2b), —NH—CO—CH(Hal)—CH2-Hal (2c) —NH—CO—C(Hal)═CH2 or (2d) wherein Hal is chlorine or bromine, Y is vinyl or a radical —CH2CH2—U and U is a group removable under alkaline conditions, k is the number 2, 3, 4, 5 or 6, n is the number 0, 1 or 2 and m is the number 0 or 1, are suitable for dyeing or printing cellulose-containing fibre materials, preferably natural or synthetic polyamide fibre materials, and produce, with a high colour yield, dyeings and prints having good fastness properties.
摘要:
A spring element exerts a radial force on a pivotable ball head and thereby prestresses it in a ball cup, the spring element being formed by a leaf spring which extends along the lengthwise axis of the ball head and whose active line of force is directed toward the ball cup below the equator of the ball head.
摘要:
A slicing machine for foods includes a circular knife with a peripheral cutting edge mounted rotatingly in a substantially vertical position on a machine housing. The knife defines a substantially vertical cutting plane. A knife protection ring is secured to the machine housing and surrounds a substantial portion of the cutting edge. A carriage for receiving a product to be cut is mounted on the housing on one side of the cutting plane for reciprocating movement in a direction parallel to the cutting plane. A scraper is arranged on an opposite side of the cutting plane to cover part of a face of the circular knife. The scraper is mounted pivotably about a pivot axis defined by a pivot bearing so as to be pivotable from an operating position to a cleaning position. The pivot axis is arranged above the center of the circular knife essentially horizontal and parallel to the cutting plane.