Abstract: An apparatus for dispersing an active ingredient, such as a fumigant, fertilizer or room freshener in which the active ingredient is placed in a sample cylinder and a pressurized solvent/propellent is subsequently introduced from a source. The solvent/propellent expands to adopt a liquid phase and a gaseous phase. The liquid phase serves to absorb the active ingredient and the gaseous phase serves to propel the borne active ingredient out of the apparatus through a dispensing outlet where further expansion takes place and the active ingredient is dispersed in a fog or mist. Flow restrictors create a pressure differential between the sample cylinder outlet and a by-pass portion to enable total absorption of the active ingredient. The flow restrictors and conduits for the system are contained in a mixing head for the sample cylinder.

Abstract: A fluidized bed combustion system that can be operated or controlled under pressure is provided. To eliminate the erosion or abrasion to which heat exchangers located in a fluidized bed combustion chamber are subjected due to the flue dust contained in the flue gas, no thermal withdrawal or exchange takes place in the combustion chamber of the inventive fluidized bed combustion system, although the reaction conditions remain the same. At least one controllable line for returning to the combustion chamber part of the flue gas, if necessary cooled by heat exchangers variously arranged outside the combustion chamber, branches off from the flue gas line downstream of a dust separator that is disposed in the flue gas line downstream of the combustion chamber. The main area of application is the production of electrical energy and heat for the generation of steam, as process heat, or as heat for a remote site, by means of a fluidized bed combustion system that can be operated or controlled under pressure.

Abstract: The invention is concerned with a method and apparatus for dispersing an active ingredient, such as a fumigant. The active ingredient is placed in a container and a pressurized solvent/propellent is subsequently introduced. The solvent/propellent expands to adopt a liquid phase and a gaseous phase. The liquid phase serves to absorb the active ingredient and the gaseous phase serves to propel the borne active ingredient out of the apparatus where further expansion takes place and the active ingredient is dispersed in a fog or mist.

Abstract: A system for handling particulate material includes a rotary valve for feeding material from a holding device to a receiving device. The rotary valve includes a slide valve that is electrically controlled in response to sensed conditions in the handling system.

Abstract: The invention relates to a separate insertion chute (103) of the type which at spaced intervals are connected to an underground suction conveying conduit (106) communicating with a refuse suction system, the upper end above ground of each chute being provided with a closable insertion opening and the lower end below ground of each chute being connected to the suction conveying conduit. According to the invention, the insertion chute (103) consists of an upper chute portion (103a) which at its lower end is provided with a connecting flange (108a), and a lower chute portion (103b) which at its upper end is provided with a connecting flange (108e), said lower chute portion (103b) being received in a branching (109) extended from the suction conveying conduit (106), said branching likewise being provided with a connecting flange (108g) at its upper end.

Abstract: Transport container for the transport of bulk material provided with a filling-hole in the upper part and an emptying device in the rear. For the loading and unloading of also parcelled goods the container is provided with a side section that can be opened, and that the emptying device comprises a pneumatic pressure discharger with a pressure vessel into which the bulk material can freely flow from the container through a check valve and in which, with the check valve closed, pressure can be produced for discharging the bulk material through a discharge pipe.

Abstract: A lock apparatus for introducing granular dry material into a pneumatic conveying conduit (32), for example of a concrete gun, consisting of a material feeding hopper (4) having a shut-off valve (6) actuable by a pneumatic working cylinder (8). Beneath the shut-off valve (6) two hose portions (16 and 22) are arranged in series and on each of said portions a hose squeezing means (34 and 38) engages between which the hose portions (16 and 22) form a lock chamber (44) which is additionally provided with a blowing air connection (62). By the shut-off valve (6) and the upper hose squeezing means (34) an antechamber (42) is formed. When the upper hose squeezing means (34) is closed and the shut-off valve (6) opened the antechamber (42) is filled from the feeding hopper (4) by free fall. At the same time the lock chamber (44) can be discharged into the blow conduit (32) by opening the hose squeezing means (38).

Abstract: Apparatus for passing a feed of particulate material into a pneumatic conveyor conduit includes a charging chamber communicating with the material feed and a closure arrangement having a closure cone axially movable between a position of communicating the charging chamber with the material feed and a closure position of closing off the chamber from the feed. The closure cone is formed by the base portion of a hollow operating member extending substantially axially in the direction of flow of the material from the feed into the chamber. The operating member is generally tubular and has at least one opening outside the material flow path into the charging chamber. A closure element within the operating member is movable between first and second positions of closing and opening the opening in the operating member, in dependence on the phase of the conveying operation.

Abstract: A powder feeder, includes a cylinder body connected to a gas blow pipe for fluidizing a powder at its bottom portion; a porous plate crossing the lower portion of the cylinder body above a gas blow hole; a partition plate which divides the interior of the cylinder body into a powder supply side and a delivery side and has a slit for communicating the supply and delivery sides with each other at its upper portion; a powder supply pipe connected to the lower portion of the cylinder body at the supply side to be inclined downward toward a connecting portion; and a powder delivery pipe connected to the lower portion of the cylinder body at the delivery side to be inclined downward in a delivery direction.

Abstract: A pneumatic transportation system for transferring particulate material from a storage container at one pressure level to a receiving unit at another pressure level (e.g. in a feeding system for bed material to a combustion chamber of a PFBC plant). The transportation system incorporates a material feeder comprising a housing having a rotor containing two material chambers. The end walls of the housing and the rotor have cooperating sealing surfaces. The inlet opening of one material chamber is positioned opposite to an inlet opening in the upper end wall of the housing, when the outlet opening of the other material chamber is positioned opposite to an outlet opening in the lower end wall of the housing. After rotation of the rotor the inlet opening of the material chamber will be positioned opposite to the inlet opening and the outlet opening of the chamber will be positioned opposite to the outlet opening. Between the actual material chambers and the outlet openings there are cut-off valves.

Abstract: Methods and apparatus for controlling the flow of solids in systems containing solid/fluid slurries is disclosed. An L-valve, having subsequent thereto a separator for separating the solid and fluid phases of the slurry, and a way to regulate the flow of the separated fluid permits the opening and closing of the L-valve without the necessity of mechanical valving systems in contact with the solid phase. A novel L-valve design comprising a radial barrier above a vertical outlet which barrier is of sufficient dimension to permit the solids to attain their angle of repose before reaching the outlet is also disclosed.

Abstract: In a process and apparatus for pneumatically conveying loose material in grain or dust form by discharge thereof from a conveyor container, through a conveyor conduit disposed downstream thereof, after the conveyor container has been emptied and before the conveyor conduit is also emptied of the loose material being conveyed, the conveyor conduit is closed at both ends, to maintain that existing condition. After the conduit is thus closed off at both ends, leakage losses of conveying gas are compensated for by supplying a leakage make-up amount. The apparatus has a conveyor conduit which is provided at each of its end portion towards the conveyor conduit and its discharge end portion with at least one closure member to act as inlet and outlet valves respectively. At least one gas feed line from a leakage make-up valve opens into the conduit.

Abstract: For emptying a garbage room in a multistory residential building, a garbage container is placed in the garbage room, which container has a transport duct between the lower portion of the container and a garbage truck collection chamber, which can be evacuated to produce suction in the duct and thus move the garbage, usually in garbage bags. According to the invention, the garbage container is provided with an externally operable valve at one inlet for garbage coming from a garbage chute and an opening for inlet of air, which opening is also provided with a sealable valve. For emptying, during a first evacuation phase, both valves are closed and during a second evacuation phase, the valve at the air intake is open. The garbage bags are thus evacuated of air during the first evacuation phase and pressed together into a significantly smaller volume by the air flowing in during the second evacuation phase, at the same time as they are removed through the transport duct.

Abstract: A silo for storing alumina having a conical outlet at the bottom thereof is fitted with an exchangeable feeding unit mounted over the conical outlet opening. The feeding unit is adapted to close off the outlet opening when in the non-operative position. The feeding unit can take various forms and includes at least one injection nozzle for fluidizing the particulate material.

Abstract: An apparatus to serve as a valve to regulate the flow of particulate solids, from an upstream to a downstream location. The valve relies on pressure differential rather than moving mechanical parts. A plenum adjacent a chamber designed to accommodate a slumped mass of particulate solids receives fluid pressure and transmits the pressure to the slumped mass to move the particulate solids through an opening to a downstream location.

Abstract: A hydraulic capsule pipelining system including a pipeline adapted for flow therethrough of water or other carrier liquid to propel cargo-containing capsules through the pipeline, and means for pumping the liquid through the pipeline utilizing a segment of length of the pipeline as a pump cyclinder and utilizing capsules passing through said pump cylinder segment of the pipeline as pistons in said segment for pumping the liquid forward through the pipeline, capsules being propelled through said segment by an externally produced electromagnetic field.

Abstract: There is provided an improved powder flame spraying apparatus and method having a preheating nozzle in advance of a plurality of final heating nozzles into the converging flame envelopes of the latter of which hardfacing powder is dispensed. This powder is aspirated into a pressurized stream of inert gas at a variable rate readily adjusted between maximum and no-flow by selectively regulating the gas pressure at and/or spaced downstream from the outlet of the powder aspirator. Regulation of the gas pressure is achieved by venting variable quantities of gas to the atmosphere or air to the aspirator outlet as appropriate to provide a desired powder flow and to achieve a desired volume and velocity of gas and powder delivery into the final heating flames.

Abstract: An installation for transporting fine-grained material to a consumer using two alternately filled and emptied pneumatic pressure vessels (3, 4) together with an outlet valve (12, 12') and a control nozzle (15, 15') in the material discharge pipe of each of the two pressure vessels. The control nozzles (15, 15') are connected to an air distributor (18) through which the control nozzle receives a reduced amount of compressed air when the material discharge pipe is shut off.With an installation such as this, a continuous and exactly metered delivery of fine-grained material is obtained without any mechanically moved parts in the delivery path and with a low rate of flow in the delivery pipe.

Abstract: A hopper comprises a suction conduit and a pressure conduit each connected to a pump for discharge of the hopper contents, the suction conduit being horizontal and communicating at its free end via a control valve with water outside the hopper, a plurality of vertically extending suction pipes extending downwardly from the suction conduit and spaced above the hopper bottom, each suction pipe having a valve, and cone-shaped bottom valves below the suction pipe open ends for conducting water from outside the hopper to the suction pipes.