摘要:
Process for pretreating a very acid natural gas containing a substantial amount of hydrogen sulfide (H2S), possibly combined with carbon dioxide (CO2), comprising at least a stage wherein the initial natural gas is contacted in a distillation column with a liquid condensate itself resulting from cooling of the gaseous fraction obtained during said contacting stage. This solution allows to eventually recover at a lower cost a gas enriched in methane, depleted in hydrogen sulfide and freed from substantially all of the water it contains, and a liquid phase containing most of the hydrogen sulfide, substantially all of the water and depleted in hydrocarbon. Control of the thermodynamic conditions during the stages that characterize the process, according to the water content of the gas during treatment, allows progressive exhaustion of the water contained in said gas while preventing hydrates formation.
摘要:
An improved method and structure for purification of an acid gas stream by using raw fuel gas as a stripper to remove the BTEX and VOCs from the liquid amine stream. The improved method is particularly useful for purification of acid gas streams with BTEX contaminant levels in excess of environmentally acceptable levels for standard processing. Raw fuel gas is utilized at moderate temperatures and pressures, the uptake of BTEX and VOCs reduces the level of these compounds in the waste amine stream to environmentally acceptable levels, and the remaining contaminants may then be dealt with by ordinary means. Levels of H2S and CO2. in the liquid amine stream are also reduced.
摘要:
Disclosed is an air conditioner enabling to supply a room with oxygen as well as control temperature and humidity of air therein. The present invention includes an outdoor module 10, an indoor module 20, a refrigerant tube 30, and an oxygen generating module. The outdoor module 10 includes a condenser 11, an outdoor fan 12, and a compressor 13 so as to compress and condense a refrigerant. The indoor module 20 includes an evaporator 21, an indoor fan 22, an inlet 23, and an outlet 24 so as to cool the air in the room. The refrigerant tube 30 connects the evaporator 21 of the indoor module 20 to the condenser 11 of the outdoor module 10 so as to circulate the refrigerant. And the oxygen generating module includes an oxygen generator 100 installed at the outdoor module 10 so as to generate oxygen by sucking an outdoor air, an oxygen exhauster 200 installed in the indoor module 20 so as to exhaust the oxygen, and an oxygen transport tube 300 transporting the oxygen generated from the oxygen generator 100 to the oxygen exhauster 200.
摘要:
A high purity stream of methane can be obtained from crude natural gas, especially exhaust gas from waste landfills, by a process that includes first removing moisture, then feeding the dried crude gas mixture to a gas-liquid contact absorber to strip heavy hydrocarbon compounds in a primarily carbon dioxide by product stream. Methane enriched gas from the absorber is separated in a membrane separation unit which provides permeate enriched in carbon dioxide that is recycled to the absorber and a purified product stream of methane.
摘要:
The invention relates to a method for purifying the by-product gases that originate in a high-pressure melamine manufacturing installation in a urea wet scrubber. According to said method, CO2 is added to the by-product gases before or during their entry into said urea wet scrubber.
摘要:
There is provided a device for diverting liquid from a pipeline, and particularly for use with multi-phase flows where separation of liquid from gas is required. The device comprises a first conduit (50), a second conduit (52) connected across at least part of the first conduit, and means (80) for controlling flow of liquid from the first conduit through the second conduit by use of hydrostatic pressure. The first conduit is provided with an inlet (56) at substantially right angles to the first conduit. The second conduit further comprises an annulus (58) extending inwards from an inner wall of the first conduit and a lip (60) extending upwards from an inner circumference of the annulus. A number of embodiments of the device are described. The device is also suitable for fitting to flow meters to extend their range of operation.
摘要:
A method of reducing the pressure drop in a downflow/upflow wet flue gas desulfurization (WFGD) system and of improving overall sulfur dioxide collection efficiency by converting the downflow/upflow WFGD system to an upflow single-loop WFGD system. The method includes the replacing of the downflow quencher and related duct work with a bypass for connecting the incoming flue gas duct with the upflow absorber, and the adding of a quenching zone in the absorber comprised of spray headers.
摘要:
A method for removing organic sulfur compounds from a vent gas is described. Also described is an apparatus for absorbing organic sulfur compounds from vent gas.
摘要:
A method and apparatus for treating an exhaust gas containing volatile organic compounds. The method includes the steps of: introducing an exhaust gas into a wet scrubber, so that the organic pollutants in the exhaust gas are absorbed by a scrubbing water; pumping the scrubbing water containing the organic pollutants into at least one oxidation tank, thereby causing oxidation reaction between the organic pollutants and an oxidizing agents containing ozone; and introducing the scrubbing water after the oxidation reaction into the wet scrubber. The oxidizing agent further comprises hydrogen peroxide.
摘要:
The present invention provides a mercury removal method which can effectively remove very small amounts of mercury components present in a gas during wet gas purification such as coal or heavy oil gasification gas purification and petroleum refining. A mercury removal method for the removal of mercury present in a gas, the method comprising the steps of bringing a gas containing at least mercury and not less than 10 ppm of hydrogen sulfide into gas-liquid contact with an absorbing fluid under pressurized conditions so as to cause mercury to pass into the absorbing fluid; flashing the mercury-containing absorbing fluid under lower-pressure conditions to separate it into gaseous components and liquid components; and removing the mercury contained in the separated gaseous components by adsorption to an adsorbent.