Process and apparatus for recovering vapor
AssigneeJordan Holding Company
InventorEdward Menzenski
Life of this patent
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Abstract
A process and apparatus are provided for recovering volatile liquid vapors from an air-volatile liquid vapor mixture. The process includes: (1) cooling the mixture to condense volatile liquid vapors and moisture; (2) collecting the condensed volatile liquid vapors and moisture; (3) circulating the cooled and dehumidified mixture through a bed of adsorbent; and (4) desorbing and recovering the volatile liquids from the bed. The apparatus includes a refrigeration unit, a cooler for cooling the mixture, two reaction vessels each including a bed of adsorbent, a pump, an absorber tower and a valve and conduit system for circulating the mixture through the various components of the apparatus. Heat may be recovered from the refrigerant and used to heat the bed during desorption.
Claims24
A process for recovering volatile liquid vapors from an air-volatile liquid vapor mixture, comprising the steps of:
- collecting the air-volatile liquid vapor in a bladder tank;
- feeding the collected air-volatile liquid vapor mixture from said bladder tank to a cooler at a predetermine rate of flow;
- cooling the air-volatile liquid vapor mixture to condense volatile liquid vapor and moisture from the air-volatile liquid vapor mixture;
- collecting the condensed volatile liquid vapor and moisture;
- circulating the cooled and dehumidified air-volatile liquid vapor mixture through a first bed of adsorbent having an affinity for the volatile liquid whereby volatile liquid is adsorbed on said first bed and a substantially volatile liquid vapor-free air stream is exhausted;
- initially pulling a vacuum to draw air with a relatively low concentration of volatile liquid vapor from said first bed;
- adsorbing the relatively low concentration of volatile liquid vapor on a second bed of adsorbent;
- drawing air with a relatively high concentration of volatile liquid vapor from said first bed upon reaching a predetermined vacuum level;
- condensing the volatile liquid vapor from the air with a relatively high concentration of volatile liquid vapor;
- and
- recovering the condensed volatile liquid vapor.
An apparatus for recovering volatile liquid vapor from an air-volatile liquid vapor mixture, comprising:
- a bladder tank for temporarily storing the air-volatile liquid vapor mixture prior to processing;
- a cooler for cooling the air-volatile liquid vapor mixture so as to condense volatile liquid vapor and moisture from the air-volatile liquid vapor mixture;
- a refrigeration unit for providing cooling to said cooler;
- means for feeding the air-volatile liquid vapor mixture from said bladder tank to said cooler at a predetermined rate of flow;
- a pair of reaction vessels, each reaction vessel including a bed of adsorbent having an affinity for the volatile liquid whereby volatile liquid is adsorbed on said bed and relatively volatile liquid vapor free air is produced;
- first valve and conduit means for selectively circulating the air-volatile liquid vapor mixture from said cooler to either of said reaction vessels;
- a pump;
- second valve and conduit means for selectively connecting said pump to either of said reaction vessels for drawing a vacuum on the bed in the connected reaction vessel so as to recover the previously adsorbed volatile liquid vapor now concentrated in air;
- and
- third valve and conduit means for selectively directing air with a relatively low concentration of volatile liquid vapor from one of said reaction vessels to another of said reaction vessels and air with a relatively high concentration of volatile liquid vapor from said one reaction vessel to said cooler.
A process for recovering volatile liquid vapors from an air volatile liquid vapor mixture, comprising the steps of:
- collecting and feeding the air-volatile liquid vapor mixture to a cooler at a predetermined rate of flow of between 10-3000 scfm;
- cooling the air-volatile liquid vapor mixture to at least -10.degree. F. so as to condense volatile liquid vapor and moisture from the air-volatile liquid vapor mixture;
- collecting the condensed volatile liquid vapor and moisture;
- circulating the cooled and dehumidified air-volatile liquid vapor mixture through a first bed of adsorbent having an affinity for the volatile liquid whereby volatile liquid is adsorbed on said first bed and a substantially volatile liquid vapor-free air stream is exhausted;
- and
- initially pulling a vacuum to draw air with a relatively low concentration of volatile liquid vapor from said first bed;
- adsorbing the relatively low concentration of volatile liquid vapor on a second bed of adsorbent;
- drawing air with a relatively high concentration of volatile liquid vapor from said first bed upon reaching a predetermined vacuum level;
- condensing volatile liquid vapor from the air with a relatively high concentration of volatile liquid vapor;
- and
- recovering the condensed volatile liquid vapor.
An apparatus for recovering volatile liquid vapor from an air-volatile liquid vapor mixture, comprising:
- a cooler for cooling the air-volatile liquid vapor mixture so as to condense volatile liquid vapor and moisture from the air-volatile liquid vapor mixture;
- a refrigeration unit for providing cooling to said cooler;
- means for feeding the air-volatile liquid vapor mixture to said cooler at a predetermined rate of flow of between 10-3000 scfm;
- a pair of reaction vessels, each vessel including a bed of adsorbent having an affinity for the volatile liquid whereby volatile liquid is adsorbed on said bed and relatively volatile liquid vapor free air is produced;
- first valve and conduit means for selectively circulating the air-volatile liquid vapor mixture from said cooler to either of said reaction vessels;
- a pump;
- second valve and conduit means for selectively connecting said pump to either of said reaction vessels for drawing a vacuum on the bed in the connected reaction vessel so as to recover the previously adsorbed volatile liquid vapor now concentrated in air;
- and
- third valve and conduit means for selectively directing air with a relatively low concentration of volatile liquid vapor from one of said reaction vessels to another of said reaction vessels and air with a relatively high concentration of volatile liquid vapor from said one reaction vessel to said cooler.
Dependencies are inferred from the claim text.