Processes and systems for transferring particulate substances from containers
View Patent ↗Preferred processes are provided for unloading a particulate substance from a container using a cover system comprising a cover and a wand extending through the cover. The processes can include installing the cover system on the container so that the cover mates with the container and the wand extends into the particulate substance, connecting a pipe or a hose to the wand, and drawing the particulate substance through the wand and the pipe or hose.
1. A process for transferring catalyst and/or additive from a container to an injection device that injects the catalyst and/or additive into a fluid catalytic cracking unit, comprising:
providing a cover having a wand connected thereto, where the wand extends from the underside of the cover;
installing the cover on the container such that the connected wand penetrates into the catalyst and/or additive as the cover is installed;
placing the wand in fluid communication with a vacuum source of the injection device; and
drawing the catalyst and/or additive from the container by way of the wand.
2. The process of claim 1 , further comprising tilting the container.
3. The process of claim 2 , wherein tilting the container comprises tilting the container so that a central axis of the container is angled less than approximately ninety degrees in relation to the vertical direction.
4. The process of claim 3 , wherein tilting the container comprises tilting the container so that the central axis of the container is angled between approximately twenty to approximately sixty degrees in relation to the vertical direction.
5. The process of claim 2 , wherein tilting the container comprises placing the container on a cradle that supports the container in a tilted orientation.
6. The process of claim 1 , wherein placing the wand in fluid communication with a vacuum source of the injection device comprises connecting a hose or a pipe to a fitting mounted on the cover, the fitting having a flow path in fluid communication with a flow path of the wand.
7. The process of claim 6 , further comprising drawing the catalyst and/or additive through the cover by way of the fitting.
8. The process of claim 1 , further comprising placing a volume defined by the cover and the interior of the container in fluid communication with a source of a fluid that is non-reactive with respect to the catalyst and/or additive.
9. The process of claim 1 , further comprising removing another cover from the container before the step of installing a cover on the container.
10. The process of claim 1 , wherein the wand penetrates into the catalyst and/or additive so that the wand extends to a position proximate the bottom of the container.
11. The process of claim 1 , wherein drawing the catalyst and/or additive from the container by way of the wand comprises drawing the catalyst and/or additive from the container by way of the wand while the cover substantially isolates the catalyst and/or additive within the container from ambient environment around the container.
12. The process of claim 1 , wherein the end of the wand that extends into the catalyst and/or additive is angled in relation to a longitudinal axis of the wand.
13. The process of claim 1 , wherein the wand is tubular.