185 results about "Flash-gas" patented technology

A closed loop single mixed refrigerant process and system wherein the process efficiency is increased by increasing the temperature of liquefied material produced in a heat exchange refrigeration zone and thereafter cooling the liquefied material by flashing a portion of the liquefied material to produce a cooler liquefied material and a flash gas a portion of which is recycled to the heat exchange refrigerator. The process and system provide increased process efficiency and flexibility.

A low pressure suction side refrigerant to liquid refrigerant heat exchanger, located in the refrigeration circuit in such a way that the sensor (and external equalizer tube, if applicable) is located downstream of the low pressure refrigerant outlet of the heat exchanger, provides for effectively eliminating both the superheat and flash gas loss regions of the evaporator which in turn increases the mass flow through the evaporator and increases the refrigerating capacity of the evaporator at very little increase in compressor power thereby providing for increased system efficiency for refrigerating or cooling purposes. On the heating side, heat rejection capacity of a heat pump is increased even more dramatically because of the heat reclaim of the flash gas loss heat, which provides for even greater efficiency increases for heating applications.

The invention relates to a purification process of liquefied gas and particularly provides a high-temperature hydrogenation and purification process for liquefied gas materials. The high-temperature hydrogenation and purification process is characterized by comprising the following steps: (1) carrying out heat exchange on raw material liquefied gas and a reactor outlet product in a heat exchanger, heating by a heating furnace to a reaction temperature, then feeding the material into a reactor from the top, carrying out saturation hydrogenation on olefin in the material to obtain alkane, and respectively hydrogenating and converting sulfide, oxide, nitride and halide into hydrogen sulfide, water, ammonia and hydrogen halide; (2) carrying out sufficient heat exchange on the reactor outlet product and the raw material by an efficient heat exchanger, carrying out water cooling by a water cooler and enabling the material to enter a gas-liquid separation tank, compressing a flashing gas phase and fresh hydrogen by a compressor and circulating to the raw material liquefied gas; (3) enabling the flashing liquid phase to enter an alkali washing deposition tank and carrying out fiber membrane alkali washing to remove hydrogen sulfide, ammonia and hydrogen halide; (4) enabling the material which is subjected to the alkali washing to enter a dearsenicator, and removing arsenic and metal to obtain refined liquefied gas. The high-temperature hydrogenation and purification process mainly aims at a project which is very strict in requirement on the impurity content of a catalyst, and is short in flow, small in investment, low in cost and less in solid wastes.

The recycle gas stream containing hydrogen that is part of the feedstream to a hydroprocessing reactor is mixed with the low purity make-up hydrogen and the sour flash gases upstream of the recycle gas compressor and compressed by the recycle gas compressor. The compressed gases pass through a methane and higher (C₁+) absorber to produce a sweet hydrogen recycle gas stream that is delivered to the hydroprocessing reactor at 96-98 mol % hydrogen. The process can be used to advantage in existing process facilities to increase the hydrogen partial pressure in the feedstream to the hydroprocessor where the existing recycle gas compressor is not designed for compressing the high purity hydrogen.

The invention discloses a household air source heat pump heating system in cold area and a device thereof, and relates to a heat pump system which uses the air source for running steadily under the low-temperature environment and supplying the interior with the needed heat and healthy hot water and a device thereof. The device comprises parts such as a low pressure frequency compressor, a high pressure compressor, an outdoor heat exchanger, a flash evaporator, a reservoir, a defrosting coil, a flash gas overheating coil, a compressor heat radiating recovery coil, a low pressure air supply pressurization line, a sub-thermal converter, a multi-head efficient spiral heat exchanger, a thermal expansion valve, and the like, which are connected by a pipeline. The invention is characterized in that the system comprises a flash evaporator component, a flash gas overheating coil, a compressor heat radiating recovery coil, and a low pressure air supply pressurization line. When in heat operation under low-temperature working condition, based on the two-stage compression cycle which is incompletely cooled between two stages of throttles, the invention uses the flash gas overheating coil, the compressor heat radiating recovery coil, and the low pressure air supply pressurization line for recovering the heat radiating capacity of a compressor, realizes the overheating of the flash gaseous working substance, enhances the gas transmission capacity of the compressor, and further improves the heat and the energy efficiency ratio of a heat pump system. Meanwhile, the defrosting coil is added to the bottom part of the heat exchanger device, so the frosting problem of the outdoor heat exchanger of the heat pump is solved. The invention can realize the mutual switch among a single heating operating mode in winter, a heating and healthy hot water united operating mode in winter, and a healthy hot water single operating mode during a non-heating period.

A coaxial economizer for use in a chiller system comprising an inner housing and an outer housing having a common longitudinal axis. The outer housing has an inlet for receiving a fluid from a upstream compressor stage of a multistage compressor and an outlet for conveying a fluid to a downstream compressor stage of a multistage compressor. A flow chamber forms a fluid flow path about the inner housing. A flash chamber is coterminous with the flow chamber and flashes fluid in a liquid state to a gas state. A flow passage between said flash chamber and the flow chamber for conveying a flashed gas from the flash chamber to the flow chamber; wherein the flashed gas conveyed from the flash chamber and the fluid received from the inlet of the outer housing mix along the fluid flow path toward the outlet of the outer housing.

The invention discloses an air-source heat pump device integrating cool and warm air conditioning and water heating in the cold area, which belongs to the technical field of refrigeration air conditioner. The device consists of two high and low pressure compressors, a flash evaporator, a defrosting coil pipe, a flash gas superheated coil pipe, a compressor heat recovery coil pipe, a low pressure gas supply pressure pipeline and other parts which are connected through pipelines. The device is characterized in that the two high and low pressure compressors in the system have three modes of separate operation, parallel operation, and two-stage compression combined operation; and the two compressors are matched with a four-way electromagnetic directional valve, a three-way electromagnetic valve and an electromagnetic valve to form a refrigeration mode, a heating mode, a hygienic hot water mode and a refrigeration and hygienic hot water combined operation mold. The air-source heat pump device has the advantages that the device not only can refrigerate and produce hygienic hot water while refrigerating in summer; and under the microthermal climate in winter, the device can run stably to provide the heat needed by indoor heating and hygienic hot water, thereby realizing the integrated cool and warm air conditioning and water heating. The device which is used in a house in the cold area has wide popularization and application space and energy-saving significance.

The invention relates to an energy-saving gas washing process, comprising the following steps: subjecting raw gas to countercurrent contact with methanol in an absorbing column, and washing out acidic gas from the raw gas; delivering obtained carbon-rich methanol to the upper portion of a medium-pressure flashing column, and delivering rich methanol to the lower segment of the medium-pressure flashing column; delivering via an ejector, liquid carbon-rich methanol in the medium-pressure flashing column to the upper part of a re-absorbing column, and delivering sulfur-rich methanol at the bottom of the medium-pressure flashing column to the lower part of the re-absorbing column for flashing; returning two parts of liquid flashed from the upper part of the re-absorbing column respectively to the re-absorbing column and a negative-pressure flashing column; using flashed liquid rich methanol as main washing methanol, delivering flashed gas to a suction ejector, and delivering flashed sulfur-rich methanol to a subsequent heat regeneration system.

The invention relates to a method for producing carbon dioxide and in particular discloses a method for producing a food grade liquid carbon dioxide product. The method comprises the following steps of: (1) compressing; (2) dealkylating; (3) purifying; (4) liquefying; and (5) performing distillation and purification, wherein flashing gas rises and passes through structured packing of a lower corrugated plate, structured packing of an upper corrugated plate, tube pass of a lower heat exchanger and tube pass of an upper heat exchanger, and finally, the flashing gas becomes a gas mixture containing a little uncooled carbon dioxide gas and lots of methane, ethylene and oxygen and is exhausted from the top of the distillation and purification tower. By the method, the yield of the food grade liquid carbon dioxide product is improved.

The disclosed embodiments relate to systems for deaerating a stream of slag sump water produced by a gasifier. For example, in one embodiment, a system includes a flash vessel having a first inlet configured to introduce a first fluid into the flash vessel, wherein the flash vessel is configured to flash the first fluid to produce a first flash gas, a second inlet configured to introduce a stream from slag sump into the flash vessel, wherein the stream from slag sump comprises a mixture of a gasification fine slag, dissolved oxygen (O₂), and water. A gas-liquid contactor in the flash vessel is configured to contact the stream from slag sump with the first flash gas to enable the first flash gas to deaerate the stream from slag sump. A first outlet of the vessel is configured to output an overhead discharge comprising the first flash gas and oxygen from the stream from slag sump.

The invention provides a method for recovering unloading gas of a natural gas tank car and flash stream of a natural gas storage tank. The method comprises the following steps: when the gas phase pressure of an LNG (liquefied natural gas) tank car is 0.6-0.8 MPa, a pressure regulating valve is opened; unloading gas utilizes the self pressure to enter an air heater or a water-bath type electric heater; the unloading gas heated by the heater sequentially enters a buffer tank and a gas storage tank; after the pressure of the unloading gas is reduced by a secondary dropping valve to be a pressure required by a user, the pressure of the unloading gas is metered by a meter; finally, an odorizing device odorizes the unloading gas and then feeds the unloading gas to a station; when the gas phase pressure of the LNG tank car is reduced to 0.3 MPa, the pressure regulating valve is closed. The method for recovering the unloading gas of the natural gas tank car and the flash stream of the natural gas storage tank has the advantages of no waste of natural gas, safety and convenience.

Systems and methods for producing synthetic natural gas are provided. The method can include gasifying a carbonaceous feedstock within a gasifier to provide a raw syngas. The raw syngas can be cooled to provide a cooled raw syngas. The cooled raw syngas can be processed in a purification system to provide treated syngas. The purification system can include a flash gas separator in fluid communication with the gasifier and a saturator. The treated syngas can be converted to synthetic natural gas to provide steam, a methanation condensate, and a synthetic natural gas. The methanation condensate can be introduced to the flash gas separator.

A heat exchanger includes a fluid distribution manifold, a fluid collection manifold, and a plurality of tubes extending there between. A separator within the fluid distribution manifold includes a first fluid conduit and a second fluid conduit. The first fluid conduit extends through an inlet end and over at least a portion of the length of the fluid distribution manifold. A plurality of openings in the first fluid conduit fluidly couples the first fluid conduit to at least a first portion of the plurality of tubes. A first end of a second fluid conduit is arranged generally centrally within and parallel to the first fluid conduit. Refrigerant vapor is configured to flow through the second fluid conduit. Liquid refrigerant is configured to flow between the first fluid conduit and the second fluid conduit to at least the first portion of the plurality of tubes.

An apparatus and process for dehydrating a wet natural gas while removing volatile organic compounds (VOC). The well-produced natural gas is contacted with a dehydrating agent, such as glycol, which absorbs water from the natural gas. The mixture of dehydrating agent/water and heavy hydrocarbons is conveyed through a heat exchanger, separator and reboiler for removing VOC and recovering the dehydrating agent for recirculation. A stripping column is coupled to an outlet of the reboiler for stripping the dehydrating agent of any traces of water that is flashed out in the reboiler. Light hydrocarbons removed from the mixture are re-circulated as flash gas in the reboiler, thereby reducing the amount of make-up fuel necessary in the heating process.

The present invention concerns a process and an apparatus for continuous polymerisation of olefin monomers. In particular, the present invention concerns a process and an apparatus for continuous polymerisation olefin monomers like ethylene and other monomers, wherein an olefin monomer is polymerised in slurry phase in an inert hydrocarbon diluent in at least one loop reactor. According to the invention, a polymer slurry is continuously withdrawn from the loop reactor and concentrated. The concentrated slurry is conducted to a flash unit in order to remove the remaining fluid phase, and gas obtained is compressed in a flash gas compressor before it is being fed to a distillation section. By means of the present invention it is possible reduce the size of the flash gas compressor and the capacity of the distillation sections. This significantly reduces investment cost for a continuously operated polymerization apparatus.

The invention discloses a device and a method for performing multistage flash, resolution and separation on a synthetic ammonia decarburization absorption tower bottom pregnant solution. The absorption tower bottom pregnant solution enters into a primary high-pressure flash tank after being decompressed; a flashing gas phase is used as a fuel gas, and a flashing liquid phase enters into a secondary high-pressure flash tank after being subjected to heat exchange; after being cooled and separated, a gas phase of the secondary high-pressure flash tank enters into a CO2 compressor so as to be conveyed to a urea workshop section, and a separated liquid phase flows back to the secondary high-pressure flash tank, and a flashing liquid phase enters into a low-pressure flash tank after being decompressed; after being cooled and separated, the gas phase of the low-pressure flash tank enters into a CO2 recovery device, a separated liquid phase flows back to the low-pressure flash tank, the flashing liquid phase partially enters into a resolution tower after being subjected to heat exchange, and the residual part enters into an absorption tower; resolution tower overhead gas enters into a secondary high-pressure flash tank, the tower bottom solution partially returns to the tower after exchanging heat with low-change gas, the residual part enters the absorption tower after being cooled, and the absorption tower overhead gas is fed into a methanation furnace through a separator. A multistage flash evaporation and resolution process is adopted, so that the CO2 yield is improved and the energy consumption of an absorption tower bottom pregnant solution resolving process is reduced.

In one embodiment, a system includes a hydrogen sulfide (H₂S) absorber, a first flash tank, a flash gas treatment column, and a CO₂ absorber. The system also includes a first fluid path extending sequentially through the H₂S absorber, the first flash tank, the flash gas treatment column, the H₂S absorber, and the CO₂ absorber.

The invention discloses a steam compressing-jet coupling refrigeration circulating device and method. According to the steam compressing-jet coupling refrigeration circulating device and method, heat is released by means of exhaust gas of a refrigeration compressor. The steam compressing-jet coupling refrigeration circulating device comprises a compressor, a generator, a condenser, a throttling valve, a gas-liquid separator, an evaporator, an ejector, a liquid booster pump, a liquid level controller, an electromagnetic valve, a pressure sensor and the like. According to the circulating system, a condensed saturated liquid refrigerant delivered into the generator through the booster pump is heated by means of superheated steam coming out of an exhaust port of the refrigeration compressor, saturated gas under the generation pressure is generated, and flash evaporation gas separated out by the gas-liquid separator after the saturated gas is used ejecting and throttling is used as working steam of the ejector; in this way, the situation that the flash evaporation gas enters the evaporator, and consequentially the limited heat exchange area of the evaporator cannot be well used is avoided, the gas transmitting amount of the compressor is definitely reduced on the premise that the refrigerating capacity is not changed, and thus power consumption of the compressor is reduced.