摘要:
An exhaust stream treatment system includes a wet scrubber (210) having an inlet for accepting waste exhaust containing dichloromethane (201), a water inlet for accepting water (213) to be used to scrub the waste exhaust containing dichloromethane (201), a chamber in which the water is used to scrub the waste exhaust containing dichloromethane (201), an outlet for expelling dichloromethane-free exhaust, and a water outlet for expelling water and dichloromethane (211). The exhaust stream treatment system further includes a density separation vessel (220) having an inlet for accepting the water and dichloromethane output by the wet scrubber, an outlet for expelling dichloromethane (223), and a water outlet for expelling waste water (221). The system may further include a waste water return loop (224) from the waste water outlet of the density separation vessel to the water inlet of the wet scrubber. The system may further include a condenser (230) that condenses the dichloromethane-free exhaust and a condensed water return loop (232).
摘要:
Die Erfindung betrifft eine Vorrichtung und ein Verfahren zur Reinigung eines Gasstromes. Das Verfahren zur Reinigung eines Gasstromes umfasst: • Einleitung eines zu behandelnden Gasstromes mit einer Strömungsrichtung (11) in eine Rohrleitung (1) mit einem Gleichstromabscheider (G); • Eindüsung einer unkontaminierten Waschflüssigkeit (W) in den Gleichstromabscheider (G), Erzeugung einer Rotation des Gasstromes mit einem Drallerzeuger (10), Abscheidung von kontaminierter Flüssigkeit (K) aus dem Gasstrom über einen Wasserabzug (5) und Ausleitung des Reingases (14) über ein Tauchrohr (13); • Zwischenspeicherung der kontaminierten Flüssigkeit (K) in einem Pufferbehälter (8); Eindüsung der kontaminierten Flüssigkeit (K) mit Einspritzdüsen (4') in einem Sprühwäscher (I) in der Rohrleitung (1) stromaufwärts zum Gleichstromabscheider (G), • Abscheidung der kontaminierten Flüssigkeit (Κ') in einem in Strömungsrichtung (11) nachgeschalteten Wasserabzug (5') und Zwischenspeicherung in einem zugehörigen Pufferbehälter (8') für die kontaminierte Flüssigkeit (Κ'). Die kontaminierte Flüssigkeit (Κ') kann anschließend in einer weiteren Vorrichtung weiter Verwendung finden, in einen zusätzlichen Sprühwäscher (II) oder in einen Quenchkreislauf einer Vorreinigungsstufe eingeleitet werden.
摘要:
In a method for the reduction of methanol emission from an ammonia plant, a chilled methanol-containing feed gas is fed to a methanol absorber, carbon dioxide is separated from the gas phase leaving the methanol absorber, the methanol-containing gas is fed to a final separator, and the chilled, methanol-free process condensate from the final separator is used to wash out the methanol in a scrubbing column. By cooling the streams to the column and inserting a number of individual wash trays in the column, a practically quantitative removal of methanol is possible.
摘要:
With the invention a washing apparatus and a process for the efficient separation and recovery of methanol from waste gases loaded with methanol is proposed, wherein the invention also can be used in an integrated flow chart for the production and processing of methanol. The methanol fractions separated from the waste gases are recovered within the already existing, distillative processing of the crude methanol to pure methanol, so that no separate apparatuses are required for the recovery of the methanol from the loaded scrubber waste waters. The valuable substance methanol is recovered and the impact on the environment is reduced. By particular aspects of the invention the total degree of methanol separation can be adapted according to the locally applicable emission limit values.
摘要:
The invention provides a process for separating one or more hydrocarbons from a gaseous mixture of hydrocarbons, which gaseous mixture comprises: (a) one or more first hydrocarbons selected from alkanes and alkenes, and (b) one or more further hydrocarbons which are selected from alkanes and alkenes and are other than the one or more first hydrocarbons, which process comprises: contacting the gaseous mixture with an extractant suitable for extracting the one or more first hydrocarbons, which extractant comprises a polar solvent; and thereby forming: (i) a first phase comprising the extractant and the one or more first hydrocarbons; and (ii) a second phase comprising said gaseous mixture having a reduced content of the one or more first hydrocarbons.
摘要:
The present invention relates to scrubbers, particularly though not exclusively to scrubbers for treating hydrogen sulfide and mercaptan containing air streams and to scrubber media for use therein. There are provided scrubber media comprising a polycarboxylic acid composition. Also provided are methods of treating a scrubber media by addition of a polycarboxylic acid composition as well as scrubber apparatus containing a scrubber media comprising a polycarboxylic acid composition. Also provided are methods of treating a gas stream by introducing a gas stream into a scrubber media which comprises a polycarboxylic acid composition and a polycarboxylic acid composition for use to extend the operating life of a scrubber media.
摘要:
The invention relates to a process for producing a purified gas stream from a feed gas stream comprising natural gas, carbon dioxide, hydrogen sulphide, and aromatic compounds selected from the group of benzene, toluene, xylenes. In the process the feed gas stream is contacted with absorbing liquid comprising sulfolane and a secondary or tertiary amine in an absorption column. The temperature of the absorbing liquid is reduced at an intermediate section of the absorption column. A loaded absorbing liquid and a depleted gas stream are obtained. Optionally the gas stream is cooled and de-pressurized, and flash gas is obtained. A single stage flesh vessel can be used, while it is not necessary to use a scrubber or de (m)ethanizer. Flash gas comprising less than 3 ppmv BTEX can be obtained. This flash gas can be subjected to liquefaction to obtain LNG.
摘要:
Method for cleaning air or gas from undesired components, comprising the steps of: providing a porous material, in which the pores are coated with an absorbing liquid film having affinity to the undesired components, and forcing the air or gas to be cleaned through the pores coated with the absorbing liquid film, thereby promoting the absorption of the undesired components in the absorbing liquid film. And apparatus comprising a housing containing a porous material (1), in which the pores are coated with an absorbing liquid film having affinity to the undesired components, an inlet for air or gas containing the undesired components, an outlet for ejecting cleaned air or gas, and means for providing a flow of the air or gas containing the undesired components from the inlet, through the pores coated with the absorbing liquid film to the outlet.