Abstract: A sedimentation tank for separating activated sludge from a suspension of activated sludge and sewage water, with an intake (11) for the suspension, an outlet (3) for the activated sludge at the conical bottom, and a discharge (4) at the top for the sewage water that the activated sludge has been eliminated from. A pipe (7) that is open at the top and closed at the bottom by a floor (9) is accommodated at the center of the tank and an inlet (10) that communicates with the intake opens into the pipe in the vicinity of the floor. The central pipe extends above the surface (20) of the liquid in the tank, which is dictated by how much is leaving, is loosely surrounded by another pipe (8) that extends above and below the surface of the liquid, and accommodates an agitator (12) with a speed that can be set to shape the suspension at the top of the pipe into a paraboloid (21) of rotation, which extends to the edge and from which the suspension spills over the edge.

Abstract: A heat exchanger is especially for cooling cracked gases with boiling water. It consists of pipes (1) that the gas to be cooled flows through and that are surrounded by a cooling jacket with a coolant flowing through it. The end of each pipe that faces the gas intake is surrounded by a sleeve. The coolant flows through the sleeve. The volume of coolant flowing through the sleeve is less than the heat supplied from the gas being cooled. (FIG. 1).

Abstract: The gas-conveying pipes (8) of a heat exchanger employed to cool cracked gas are surrounded by and communicate with outer pipes (9). The outer pipes are welded into pipe slabs (4 and 5) and not only a convey a coolant but also secure the pipe slabs (4 and 5), which can accordingly by thin.

Abstract: An arrangement for the destruction of foam building up on a sewage surface in form of activated sludge, in which a reaction vessel holds the suspended foam. The reaction vessel has perforated plates which may be raised and lowered. The reaction vessel is furthermore provided with an inlet pipe connection for untreated sewage, and a discharge pipe for the treated suspension. The reaction vessel is closed off at its upper side by a plate member which has at least one flow-through opening. A nozzle located within an enclosure, is connected to this flow-through opening. The nozzle has a lower wall and an upper wall disposed at an acute angle relative to one another. The lower wall and the upper wall of nozzle, furthermore, have adjacent edges forming an outlet opening of the nozzles. One of the walls of the nozzle is pivotably movable relative to the other wall.

Abstract: A turbo-operation machine has a rotor disk (2) that rotates in a housing (1) and is surrounded by a disk diffusor. The radial length of the diffusor channel differs locally such that the static pressure at the circumference of the disk diffusor is as uniform as possible.

Abstract: One or more throttles are accommodated in a compression line and/or in a suction line to damp surges in reciprocating compressors. The size of the open cross-section of the throttle can be varied. The size is established to prevent surges from exceeding a prescribed limit.

Abstract: Device for cooling gases deriving from ammonia synthesis. The device consists of pipes accommodated in an interior space. The space is subjected to a heat-absorption medium and surrounded by a cylindrical mantle. The pipes are secured in a pipe floor and communicate with a gas-intake chamber and a gas-outlet chamber. When an ammonia-production plant has several reactors, a single gas-cooling device has up to now been associated with each. The new device is intended to decrease the engineering expenses involved in cooling the gases in such plants. A gas-intake chamber and a gas-outlet chamber is positioned at each of the two opposite ends of the jacket. Straight pipes are associated with each chamber. The pipes are adjacent and the gas flows through them in opposite directions.

Abstract: A nested-tube heat exchanger with tubes that are secured at each end in tube plates, for exchanging heat between materials at very different pressures. The first material, which flows through the tubes is very hot when it enters. One tube plate is thinner than the other and rests on a supporting plate. The supporting plate is fastened to a jacket that surrounds the nest of tubes. Each tube is surrounded by an annular gap where they extend through the supporting plate.

Abstract: A device for cooling a reactor positioned in a vessel. The vessel comprises a water space and a steam space. Cooling pipes that convey evaporating water extend through the reactor. The pipes communicate outside the reactor with the water space at the intake end and with the steam space at the outflow end. The object is to prevent local excess cooling that would interfere with the reaction. A fresh-water preheating section is positioned inside the steam space. The preheating section communicates with an inflow outside the vessel and with an outflow inside the steam space. The preheating section also has open pipes extending through it from top to bottom into the steam space.

Abstract: A method of operating an absorption refrigeration system. The system has high- and low-pressure sections. The sections are connected by three lines and have an evaporator for subcooling the liquified refrigerant before it enters a connecting line. To enable uninterrupted transport of the weak refrigerant solution without increasing prime cost, the refrigerant vapor is fed from a subcooler into the expanded weak refrigerant solution at one or more points and a connecting line that conveys the weak refrigerant acts as an absorber. Expanded and evaporating refrigerant fluid flows through a subcooler in the high-pressure section. A condenser is in a line that conveys the weak refrigerant solution. The exit from the subcooler communicates through another line downstream of an expansion valve with a line that conveys the weak refrigerant solution and acts accordingly as an uncooled absorber.

Abstract: A bundled-tube heat exchanger of the vertical arrangement type has a gas inlet chamber and a gas outlet chamber. These gas chambers are connected by gas transfer tubes. The gas transfer tubes are surrounded by cooling medium tubes within a housing chamber. Each of the cooling medium tubes opens out into a respective connecting chamber that is formed between the casing chamber, the gas inlet chamber, and the gas outlet chamber. A gas transfer tube that is open to the casing chamber connects the casing chamber to a connecting chamber.

Abstract: A heat exchanger with two bundles of tubes is employed to cool the hot gases deriving from the synthesis of ammonia. The two bundles communicate directly at the incoming-gas end and through a reversing chamber positioned between them at the outgoing-gas end. The first bundle is surrounded by several chambers with separate media flowing through them. The second bundle is provided with still another separate medium flowthrough.

Abstract: A heat exchanger for the cooling of hot gases from the synthesis of ammonia. The heat exchanger has tubes which are bent into U-shape and are arranged within a shell. The tubes are inserted into a tube plate. An exit chamber and an entry chamber are arranged therein for the gases to be cooled adjacent the tube plate. Separating walls are arranged within the shell for the formation of closed preheating chambers and enclose the exit limbs of all tubes. The entry limbs extend within a separated middle space. A preheating chamber and the middle space are provided with separate connections for their own water passage.

Abstract: A thermally loaded container is supported by way of support brackets on two bearings arranged at a spacing from each other. In order to permit a length change caused by temperature in horizontal direction and a raising in vertical direction, the brackets in one bearing are guided to be displaceable vertically and horizontally. The other bearing consists of hinged supports which are inclined relative to the longitudinal axis of the container and pivotable in direction of the longitudinal axis of the container.

Abstract: An absorption refrigeration system with a booster compressor in which at least one partial flow of a refrigerant vapor is extracted at an intermediate pressure appropriate for absorption.The method is performed by installing at least one additional absorption stage for the absorption of the extracted partial flow. Only the remaining refrigerant vapor has to be compressed to the total pressure difference.

Abstract: An overpressure-control valve has a valve housing formed with a front output chamber, a back intake chamber adjacent and back of the output chamber, and a valve seat lying between the chambers. A valve body can move in the housing forward toward the valve seat into a closing position on the seat and blocking flow between the chambers and backward from the valve seat and into an open position permitting flow between the chambers. This body has at least one forwardly directed face and at least one backwardly directed face exposed in the chambers. The effective surface area of the forwardly directed face is greater than that of the backwardly directed face. A spring urges the valve forward into the open position with a predetermined generally constant biasing force so that the valve body moves back against the spring into the closed position when the backwardly effective pressure on the forward face overcomes both the force of the spring and the pressure on the back face.

Abstract: A tube bundle heat exchanger having an additional tube bottom with insertion tubes arranged in the inlet chamber upon the inlet side of the hot gases for the tubes located between the tube bottoms of the tube bundle. The additional tube bottom is arranged in such a way that both tube bottoms in the inlet chamber define another inlet chamber for colder, slag-free gases, which inlet chamber is accessible through an inlet in the shell of the tube bundle heat exchanger. The insertion tubes project far into, but not to the end of, the tubes of the tube bundle. The insertion tubes, with the outer tubes, form relatively narrow annular spaces suitable for generating high discharge speed. Four spiral formed strips respectively located in the annular spaces impart a twist to the gas flow discharging from the annular spaces to assure that gas discharging between the insertion tubes and the tubes of the tube bundle remain in flowing contact along the inner walls of the tubes.

Abstract: A tube-bundle heat exchanger for cooling a medium having a high inlet temperature. The heat exchanger has an inlet tube bottom and an outlet tube bottom, in which are fastened the ends of tubes which connect the bottoms and through which the medium of high inlet temperature flows. An intermediate tube bottom, having insert tubes arranged concentrically in the tubes, is located in the inlet chamber, with these insert tubes projecting out on both sides from the tubes and forming annular spaces therewith. Toward the inlet chamber, the annular spaces open into an intermediate chamber limited by the inlet tube bottom and the intermediate tube bottom; in the opposite direction, the annular spaces open into a deflecting or reversing chamber sealingly covering the insert tubes.

Abstract: A rotary piston compressor including a main housing part composed of a plurality of interconnected components one of which has a trochoidal two arc-shaped inner surface forming a race way, and a triangular piston rotatable in the eccentric of an eccentric shaft. The corners of the triangular piston are in continuous sliding contact with the race way. The components are surrounded by a capsule housing which on one side of the compressor has a pressure connection arranged in a dome-shaped cover. This cover includes a hood separating the high pressure section from the low pressure section. The cover is connected to the hood by a central member forming a connection for the inlet conduit. The hood sealingly engages a step in the adjacent housing component.

Abstract: An absorption refrigerating machine for operation encountering differences of heat energy and refrigeration requirement over a period of time. A storage unit for storing of refrigerating medium-fluid is provided in the flow direction of the refrigeration medium after the condenser for liquefying of refrigerating-medium-vapor; a storage unit for storing of weak refrigeration medium-solution is provided in the flow direction of the solution in a bypass conduit after the solution heat exchanger and the automatic expansion or relief valve. The bypass conduit is connected with a continuous line or conduit by two distributor valves, and a storage unit for storage of rich refrigeration medium-solution is located in the flow direction of the solution after the absorber.