摘要:
An apparatus for discharging bulk material (1) from a container containing process gas, which is under excess pressure, consisting of a screw conveyor with a closure in the form of a closing cone ( 4 ) and a downstream purge tank in which gas discharged with the bulk material is rinsed out of the bulk material by means of a purge gas.
摘要:
The invention relates to a tubular reactor for carrying out a catalytically supported, homogeneous chemical reaction in the gas phase at an elevated temperature and a subsequent cooling, wherein the reactor is arranged upright, and therefore the tubes extend vertically and the gas flows downward through the tubes, wherein the tubes are filled with a catalyst bed in the upper part thereof extending in the reaction zone of the reactor and are filled with a structured packing in the lower part, the cooling zone of the reactor.
摘要:
In a process for distilling polymerization-prone compounds from liquid mixtures of matter which, apart from the readily polymerizable compound, also contain other components and also polymerization inhibitors, the evaporator is operated in forced circulation and at a pressure which makes possible superheating of the liquid with respect to its boiling point at the pressure within the distillation column. This is achieved by transporting the superheated liquid against a flow restrictor, e.g. an orifice plate. The liquid which is expanded and partially evaporated on passage through the flow restrictor is returned to the distillation column. In this manner the formation of an open vapour space in the evaporator circuit after heating downstream of the heat exchanger is avoided in that, in the design of the evaporator of the prior art, formation of polymer deposits frequently occurs.
摘要:
The invention relates to a gas scrubber, equipped with heat exchanger surfaces constructed from thermal sheets, suitable for cooling and purifying a hot gas, while avoiding excessive thermal loading of the scrubbing liquid.
摘要:
The invention relates to a method for continuously producing melamine from urea by means of a fluidized bed reactor, wherein process gas conducted in the process circuit is used as the fluidizing gas, and wherein the temperature of the process gas at the inlet of the conveying element for the fluidizing gas is adjusted by adjusting the mixture ratio of a process gas flow conducted through a scrubber and a process gas flow conducted past the scrubber.
摘要:
The invention relates to a distillation column with an externally located circulating evaporator and a sedimentation zone in the column sump from which the evaporator is supplied, and also relates to the use of the distillation column according to the invention for distilling acrylic acid.
摘要:
The aim of the invention is the distillation of temperature-sensitive liquids, in particular acrylic acid and the esters thereof. This is achieved in that the liquid is heated in a column and at least partially vaporized. The vapor is conducted through a condenser that is provided within the column, said vapor being at least partially condensed in the condenser. The condensed liquid is at least partially drawn off from the column. The distillation is characterized in that the vapor that is not yet condensed is conducted through the condenser concurrently with the condensed liquid.