The present invention relates to a method for treating a cracked stream stemming from a fluid catalytic cracker unit (FCCU) in order to improve propylene recovery. The present invention also relates to the corresponding installation to implement the method.

A volatilized substance is condensed using a vapor-liquid interface. The volatilized substance is diffused into a condenser vessel containing a cooling liquid via a diffusion device. When the volatilized substance comes into contact with the cooling liquid it is condensed. The large vapor-liquid surface area created by the diffusion device enhances the rate of condensation. The cooling liquid is circulated through a heat exchanger to remove heat introduced by the condensing vapor. The temperatures of the cooling liquid leaving and entering the condenser vessel are monitored.

An apparatus includes an atomizer with a first flow member defining a first flow path and a second flow member defining a second flow path such that a solution and an inlet gas can flow in the first and second flow path to a mixing volume defined by the first flow member. A vane of the second flow member redirects a portion of at least one of a tangential velocity component or a circumferential velocity component of the flow to produce a rotational velocity component therein. The solution and the inlet gas mix within the mixing volume to produce a mixture. A separator is fluidically coupled to the second flow member to receive the mixture. The separator produces a first flow including a vaporized portion of a solvent from the solution and a second flow including a liquid portion of the solvent and a solute from the solution.

A water generation system for generating liquid water from a process gas containing water vapor is disclosed. In various embodiments, the water generation systems comprise a solar thermal unit, a condenser and a controller configured to operate the water generation system between a loading operational mode and a release operational mode for the production of liquid water. A method of generating water from a process gas is disclosed herein. In various embodiments, the method comprises flowing a process gas into a solar thermal unit, transitioning from the loading operational mode to a release operational mode; flowing a regeneration fluid into the solar thermal unit and the condenser during the release operational mode; and, condensing water vapor from the regeneration fluid to produce liquid water.

According to an embodiment of the disclosure, a desalination system includes a latent heat exchanger, a hydroclone, a compressor, and a quiescent vertical column. The latent heat exchanger is configured to receive saltwater. The latent heat exchanger includes tubes with an interior that are configured to circulate supersaturated brine with suspended salts. The hydroclone is configured to receive a flow from the latent heat exchanger. And, the hydrocodone has a flow that is substantially steam exiting the top and a flow that is substantially liquid exiting the bottom. The compressor that receives at least a portion of the flow that is substantially steam exiting the top of the hydroclone. An output of the compressor recirculating at least a portion of the flow back to the latent heat exchanger.

The invention discloses a synthesis method and device for rapidly producing lactide at high yield. The method comprises: adding a single component of lactic acid or two components of lactic acid and catalyst, passing the mixture through a mixer to enter an oligomer preparation system, increasing a residence time through bottom circulation, synthesizing oligomeric lactic acid, and passing a gas-phase component through a rectification system. With the adoption of the device, the lactide is capable of being efficiently synthesized, crude lactide with a yield of 94% to 98% is capable of being obtained.

The invention relates to a process for separating a component mixture (K) comprising hydrogen, methane, hydrocarbons having two carbon atoms and hydrocarbons having three or more carbon atoms, wherein in a deethanization at least a portion of the component mixture (K) is subjected to a first partial condensation by cooling from a first temperature level to a second temperature level at a first pressure level to obtain a first gas fraction (G1) and a first liquid fraction (C1), at least a portion of the first gas fraction (G1) is subjected to a second partial condensation by cooling from the second temperature level to a third temperature level at the first pressure level to obtain a second gas fraction (G4) and a second liquid fraction (C2), and at least a portion of the first liquid fraction (C1) and at least a portion of the second liquid fraction (C2) are subjected to a rectification to obtain a third gas fraction (G3) and a third liquid fraction (C3+). The first liquid fraction (C1) or its part subjected to the rectification and the second liquid fraction (C2) or its part subjected to the rectification are expanded to a second pressure level and the rectification is carried out at the second pressure level, the first pressure level being 25 to 35 bar and the second pressure level being 14 to 17 bar. An overhead gas formed during the rectification is cooled to 25 to 35 C. and partially condensed, wherein a condensed portion of the overhead gas is used partially or completely as a reflux in the rectification and an uncondensed portion of the overhead gas is provided partially or completely as the third gas fraction (G3). The present invention likewise provides a corresponding plant (100, 200).

A Pressure Gradient Seawater Distillation System for distilling a fluid. The elements of the system are positioned to transmit heat to improve efficiency. Fluid enters an entry tube, cooling a photovoltaic panel and cooling water in an intermediate tube. The entry tube deposits fluid in an evaporator, where the fluid is heated to transform into a gas. The gas is transmitted to a condensing chamber, where the pressure is varied to assist in condensation. Condensed water is stored in a reservoir, where a splitter is used to transmit a portion of the excess water to an exit point, while the remainder of the water is cooled by heat exchange and transmitted to a nozzle in the condensing chamber. Water falls from the nozzle to capture water vapor in condensing the gas in the condensing chamber or in condensing regions of a single compartment distiller. A flow control element, a pressure valve, and pressure controls are included for managing fluid flow and pressure.

The Cryo-Thermo Desalinator (CTD) is a fire and ice approach to potability and water reuse using liquid natural gas (LNG) for systemic fuel and cooling. The upstream key heat exchanger (HX) uses LNG to differentiate raw water into pretreated ice melt and cryo-brine blowdown. Ice melt-diluted raw water is primarily sent to the mid-stream key HX condenser where it and LNG tube bundles collapse water vapor into potable water. The downstream key HX uses LNG to separate cryo-brine and thermo-brine into heavy brine and skimmed saline ice which is reinjected into pretreated raw water for maximum corrosion and scaling dilution and extra potability. Heavy brine discharge is more easily dewatered for mining salts, mineral and elements. Pressurized LNG, becoming high pressure natural gas, adds desirable latent heat of vaporization to downstream gas users, including the integrated CCGT/HRSG and is roughly-proportional to thirsty residential/industrial gas users which the CTD serves.

Embodiments of the present disclosure can include a system for harvesting salt and generating distilled water from at least one of a produced water and salt water, comprising. A direct steam generator (DSG) can be configured to generate saturated steam and combustion exhaust constituents from the at least one of the produced water and salt water. A separation system can be configured to separate the salt from at least one of the saturated steam and combustion exhaust constituents in brine form or solid form. An expansion turbine can be configured to recover energy from the steam and combustion exhaust constituents.