54results about "Separation machines" patented technology

Improved methods and related apparatus are disclosed for efficiently recovering the heat of condensation from overhead vapor produced during separation of various components of dehydrogenation reaction effluent, particularly in ethylbenzene-to-styrene operations, by the use of at least a compressor to facilitate azeotropic vaporization of an ethylbenzene and water mixture within a preferred range of pressure / temperature conditions so as to minimize undesired polymerization reactions.

A solar water purifier is disclosed. The solar water purifier uses waste heat from a solar panel, or direct heat from the sun, to boil, evaporate, and condense water to create a stream of purified water. In one embodiment, a boiling tank is mounted under and in direct thermal contact with a solar panel to absorb waste heat. In another embodiment, a transparent wall of the boiling tank is directly exposed to solar energy. Unpurified water enters the boiling tank from an inlet tank. Once in the boiling tank, a stream of steam and water vapor leaves the tank and is allowed to condense within a condenser. The condenser is located within the inlet tank, such that the heat recovered during condensation is used to preheat the inlet water to the boiling tank.

Provided is a method of separating off reaction product water and recovering a carboxylic acid used as a solvent in a reactor from a reactor discharge during oxidation of an aromatic compound, and more particularly, a method of separating off reaction product water and recovering a carboxylic acid used as a solvent in a reactor from a reactor discharge during oxidation of an aromatic compound, wherein during the oxidation of the aromatic compound, the reactor discharge is led into two or more dehydration towers having different operating pressures such that a condenser of one dehydration tower operates as a reboiler of another dehydration tower, thereby remarkably reducing energy consumption.

Energy savings in an integrated DCE / VCM plant, optionally also containing a PVC plant, is accomplished by using at least part of the vapor from a DEC quenching column to supply heat to an HCl column. The DCE plant has a high boiler column operating at superatmospheric pressure, and heat is removed from an overhead stream and used to supply heat to other portions of the process.

A method and apparatus for enhanced oil recovery comprising separating CO2 gas from coal or flue emissions of a power plant, and flash freezing the CO2 gas with super chilled air, to form frozen CO2 ice blocks or cylinders, wherein the CO2 blocks or cylinders can then be inserted into an abandoned oil well, and the CO2 can be allowed to warm up and change phase to a gas, which enables the CO2 gas to mix with the oil, and helps reduce the viscosity of the oil and allows it to flow more freely, so that it can be pumped out using conventional equipment. A first application comprises having top and bottom valves and the CO2 blocks or cylinders being allowed to change phase to a gas while inside the injection pipe, to increase the pressure therein, such that, by opening the bottom valve, pressurized jets of CO2 gas can be released into the oil, causing the oil to mix vigorously with the carbon dioxide gas, and reduce the viscosity thereof. A second application comprises allowing the CO2 cylinders or blocks to drop into the oil itself, wherein the relatively warm oil causes the frozen CO2 to change phase to a gas, which causes violent gas bubbles to form that vigorously mix with the oil, which helps reduce the viscosity of the oil so it flows more freely through the reservoir.

Process and plant for refining crude methanol, comprising at least three distillation stages operating in cascade at decreasing pressures, wherein a first stage (200) operates at a maximum distillation pressure (p2), a second stage (300) operates at a medium distillation pressure (p3), and a final distillation stage (400) operates at a minimum distillation pressure (p4), wherein the first stage and the distillation stage each produce a respective gaseous stream (204, 304) of distilled methanol, and a respective solution containing methanol that is fed to the next distillation stage, and wherein at least one first gaseous stream of distilled methanol (204), produced in the first distillation stage, and a second gaseous stream of distilled methanol (304), produced in the second distillation stage, are used as heat sources to heat the second distillation stage and the final distillation stage, respectively.

Methods of sequestering carbon dioxide (CO2) are provided. Aspects of the methods include contacting an aqueous capture ammonia with a gaseous source of CO2 under conditions sufficient to produce an aqueous ammonium carbonate. The aqueous ammonium carbonate is then combined with a cation source under conditions sufficient to produce a solid CO2 sequestering carbonate and an aqueous ammonium salt. The aqueous capture ammonia is then regenerated from the from the aqueous ammonium salt. Also provided are systems configured for carrying out the methods.

Processes and apparatuses for enhanced heat recover} / in a paraxylene manufacturing plant use a side condenser to recover high quality heat. By placing the side condenser below the location of a feed stream comprising low molecular weight gases, the heat recovered is free of such non-condensable gases. Such gases are undesirable when using the condensed vapor in other applications.

The present invention relates to water purification using solar energy. More specifically, systems and methods according to the present invention collect solar energy to heat non-potable water in a super-insulated structure. Compressed heated air is injected to evaporate water vapor out of brackish water, saltwater, or dirty water, thereby creating saturated air. The saturated air is drawn through a cooling tower and distilled water is precipitated. The systems and methods employ heat recovery and recycling processes to maximize energy efficiency.

A method for concentrating an aqueous caustic alkali produced by a membrane cell process by using a single or multiple effect evaporator system in which the vapor flows in a counter direction to the aqueous caustic alkali flow and the heat recovered from the catholyte circulation line is used as part of the concentration process. In one embodiment, a catholyte heat recovery heat exchanger and evaporation chamber are located after the last effect of a multiple effect evaporator system. In another embodiment, the catholyte heat recovery heat exchanger and evaporation chamber are located prior to the single or multiple effect evaporator system. In yet another embodiment, the catholyte heat recovery process is used in conjunction with additional heat exchanger processes to further concentrate the final product as desired.

A method for recovering heat available at low temperature in a process and its use in order to reduce the energy consumption of the said process, and application of this method to an aromatics complex in which the low-temperature heat is recovered at the head of distillation columns in the form of low-pressure steam and is reused to reboil other distillation columns in which the operating pressure has possibly been lowered.

A method for removing acidity and / or moisture from a hydrocarbon gas, in particular from a natural gas or a refinery gas fraction or a syngas, by absorption into a sweetening liquid and into a dehydration liquid, that are adapted to extract acid compounds or water from the gas, respectively. The method provides a step of prearranging a vertical elongated container (150) comprising at least one inner partition wall (168) that defines at least two treatment chambers within said container (151,152), a step of feeding a treatment liquid from the above into at least one of the two chambers (251,252) and feeding the gas to be treated from below into at least one same treatment chamber. It is also provided a step of selecting a treatment mode, wherein the gas flows along the two treatment chambers in a parallel or in a series arrangement, or one chamber being excluded; in particular the series-mode or the exclusion mode is actuated when the flowrate of the gas decreases below a minimum threshold value, while the parallel-mode is actuated when the flowrate of the gas rises above a maximum threshold value. An apparatus comprising at least such a container and a gas convey selective convey means (44′,44″), for actuating said treatment modes, in particular responsive to a flowrate of the gas. The apparatus and the method according to the invention allow to maintain the sweetening and / or dehydration efficiency, in particular in the case of a progressive reduction of the flowrate of natural gas that can be obtained from a well or gasfield.

Provided is a methanol plant that can obtain fresh water from sea water by using, in a seawater desalination device, the exhaust heat discharged in a step for producing methanol from natural gas. The methanol plant is provided with: a heat exchanger (4) that recovers into a thermal medium (for example, seawater) the exhaust heat discharged from a step for producing methanol from a feed stock (for example, natural gas); and a seawater desalinization device (6) that obtains freshwater from seawater using the exhaust heat recovered by means of the thermal medium.

Provided is a system for recovering waste heat discharged from distillation columns, incinerators, blast columns, smelting columns, and the like at relatively low temperatures to produce hot water in high efficiency, which can be used in various industrial fields. The investment and operating costs of the waste heat recovery system are relatively low as compared with the conventional systems.

An evaporation system employs a thermocompressor to recover heat associated with a distillate produced by an evaporator and to use the recovered heat to preheat evaporator feedwater. In one example, the thermocompressor produces a thermocompressor discharge that is directed into the deaerator, contacting and preheating the evaporator feedwater passing therethrough. In another example, the thermocompressor discharge is directed through a barometric condenser which contacts evaporator feedwater therein and condenses and in the process preheats the evaporator feedwater.

The invention provides a novel heat pump distillation energy saving process for a desulfurization solvent in regenerable flue gas desulfurization. The novel heat pump distillation energy-saving process comprises the following steps that A, SO2 is separated from a pregnant solution of an SO2-containing desulfuration solvent at a desulfuration section in a distillation tower through distillation, and a barren liquor at the bottom of the distillation tower is sent to a flash tower, and is flashed in the flash tower; B, flashing steam generated by the flashing is sent to a compressor, and is compressed by using a compressor to act; and C, steam output from the compressor is sent to the bottom in the distillation tower, and forms raising steam required by the distillation together with vaporized water, the raising steam and the pregnant solution falling from the upper part of the distillation tower reversely flow for performing mass and heat transfer to complete the distillation process, part of flashed barren liquor and the steam discharged from the top of the distillation tower are exchanged with heat, and the barren liquor returns to the flashing tower after the steam heat is recycled, the left flashed barrel liquor and the desulfurization solvent pregnant solution entering the distillation tower are exchanged with the heat, and cooled to 40-55 DEG C through water cooling after the heat of the barren liquor is recycled so as to be sent to a desulfurization section for being recycled. When the distillation is performed by adopting the heat pump distillation process, energy can be saved more than 70 percent in comparison with that of a conventional distillation method.